Dissertations / Theses: 'Structural restorations'

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Sirovica, Slobodan. "Using structural correlations to inform the development of longer lasting dental restorations." Thesis, Aston University, 2017. http://publications.aston.ac.uk/33427/.

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Photo-initiated dimethacrylate polymers are of great biomedical importance, in orthopaedics and particularly in dentistry where they are used as a matrix to form resin-based-composite (RBC) filling materials. However, the physiochemical properties of these materials are highly sensitive to photo-polymerisation variables, particularly the polymerisation rate, and as a consequence clinical performance is not ideal. Despite extensive mechanical and Infra-red spectroscopic characterisation of the cross-linked polymer resin matrix, the impact of polymerisation rate on the resultant structure is unknown. Using novel synchrotron FTIR, X-ray and neutron scattering techniques, this study aimed to investigate the effect that polymerisation rate has on the polymer structure, at atomic to micron length scales, of experimental RBCs based on common dimethacrylate resins. Kinetic X-ray scattering measurements demonstrated that polymerisation generates chain segment extension and changes in short range order within the structures of the constituent resin monomers. Accelerating polymerisation confers greater chain extension and reduced short range order, which at extremely fast polymerisation rates may store residual strains within the system. Neutron scattering confirmed that this relationship between polymerisation rate and structure occurs at longer length scales within the polymer, specifically at cross-linking distances. Synchrotron FTIR micro-spectroscopy showed that the introduction of filler particles into a resin matrix produced local heterogeneity with respect to the degree of monomer-polymer conversion and chemical aromatic bond strain. At nearest neighbour distances, heterogeneity is believed to originate from a lower converted and reduced bond strain boundary layer surrounding each filler particle, whilst light attenuation and likely, relative monomer mobility effects dominate at longer length scales within the resin matrix This study demonstrates that advanced synchrotron and neutron based characterisation techniques, seldom used in the field of dental materials research, can provide new insight into how the polymerisation rate may impact on the structure of the polymer matrix components of dental RBCs.

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Albertao, Gilberto. "Control of the submarine palaeotopography on the turbidite system architecture : an approach combining structural restorations and sedimentary process-based numerical modeling, applied to a Brazilian offshore case study." Thesis, Bordeaux 1, 2010. http://www.theses.fr/2010BOR14064/document.

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La dynamique des courants de turbidité est fortement contrôlée par la morphologie du fond marin. Les turbidites issues de ces courants constituent des réservoirs d’hydrocarbures très importants dans les bassins sédimentaires à travers le monde. L'objectif principal de ce travail est de comprendre comment le paleorelief a contrôlé la géométrie et l'architecture des réservoirs turbiditiques, en utilisant comme zone d'étude les réservoirs du Crétacé d'un champ pétrolier du bassin de Campos (offshore du Brésil), où la tectonique a été en partie dominée par l'halocinèse. La méthodologie utilisée dans cette thèse a couplé deux approches. La première a inclus à la fois la description des séquences sédimentaires, à partir de données de sismique-réflexion et de puits, et les restaurations structurales. Six horizons régionaux et quatre unités-réservoirs ont été identifiés et cartographiés afin de construire un modèle géologique multi-2D. Ces surfaces ont ensuite été aussi restaurées. Les résultats de cette étape suggèrent que les failles liées à l'halocinèse ont contraint la paléotopographie pour le dépôt des réservoirs plus anciens et que des structures tectoniques et un canyon ont formés les contraintes paléotopographiques pour la distribution des réservoirs plus jeunes. La seconde approche a été l'analyse du rôle des paramètres des écoulements en effectuant des simulations numériques du type stratigraphique (Dionisos) et des automates cellulaires (CATS). Une surface restaurée, considérée comme référence pour le dépôt des unités-réservoirs a été utilisée comme paléotopographie pour les simulations CATS. Le modèle numérique a été contraint par les données réservoirs. Cette utilisation inédite des simulations 3D avec des automates cellulaires dans une étude de cas réel concernant des dépôts marins anciens a produit des résultats réalistes par rapport aux exemples modernes connus. Elle a également fourni des résultats plus exploitables à l'échelle de réservoir que les modèles numériques de type "stratigraphique". Ce travail met en évidence l'importance des interactions tectonique-sédimentation et de la paléotopographie pour la distribution de réservoirs turbiditiques
The dynamic of gravity-driven turbidity currents is strongly influenced by the morphology of the seafloor. The resulting turbidites constitute important hydrocarbon reservoirs in sedimentary basins throughout the world. The main objective of the present work is thus to understand the way the paleorelief controls turbidite reservoir architectures, with application in a specific study area with Cretaceous reservoirs in Campos Basin (Brazilian offshore). The tectonics in this Basin was partly controlled by halokinesis. The first approach was describing the local Cretaceous sedimentary sequence architecture, from seismic and well data, and performing structural restorations. Six regional horizons and four reservoir-scale units were identified and mapped in order to build a multi-2D geological model. Structural restorations highlighted the structural evolution and allowed the related horizon palaeotopography to be obtained. The results of this work step suggest that the halokinesis-related listric faults regulated the distribution of the basal reservoirs. Moreover, at the top of the Albian carbonates, a canyon was identified, which, in association with the tectonic structures, forms the palaeotopographic constraints for the upper reservoir geometry. The second approach was analyzing the role of flow controlling parameters by performing stratigraphic (Dionisos) and cellular automata-based (CATS) numerical simulations. The latter provided a more appropriate reservoir scale-simulation process than Dionisos. A restored surface, considered as reference for the deposition of the reservoir units, was used as the palaeotopography for CATS simulations, having as constraints the reservoir data. This pioneer use of cellular automata simulations in a real subsurface case study produced coherent results when compared with the actual reservoir distribution. This work sheds light on the importance of tectonic-sedimentation interactions and of palaeotopography for the distribution of turbidite reservoirs

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Scott, Drew Austin. "RECOVERY OF WHOLE SOIL CONDITIONS THROUGH RESTORATION FROM AGRICULTURE AND ITS ROLE IN MEDIATING PLANT-PLANT COMPETITION." OpenSIUC, 2015. https://opensiuc.lib.siu.edu/theses/1826.

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The tallgrass prairie has been severely reduced in size, making restoration important to maintain communities and functions of this ecosystem. A chronosequence approach was used to determine recovery of physical and biological soil properties. The recovery models of soil properties provided information to explain the variation in total C stock of the whole soil. Recovery models also provided information to design a competition experiment based on variation in whole soil conditions with land use history. The filter framework hypothesis is a useful concept for examining tallgrass prairie restoration; the theory states only a subset of species in the region will be able to establish in a specific location due to abiotic and biotic filters. With this theory in mind, I explored the influence of whole soil conditions as affected by land use history (cultivation/restoration) and how these conditions altered plant-plant competition dynamics of a dominant grass was studied. Belowground plant biomass recovers with cessation of tillage and restoration back to prairie, providing an organic matter source for microbial populations to recover and soil macroaggregates to form. This has potential to increase C sequestration in soils and decrease nitrous oxide efflux from soils. Intact 5.5 cm dia cores were collected to a depth of 10 cm in each field to determine physical and biological soil properties. Belowground plant, microbial community, and soil structure properties were modeled to recover coinciding with an increase in total C stock of the whole soil. Structural equation modeling revealed that soil structure physically protecting organic matter explained the most variation in soil carbon sequestration with restoration. Most of the total C was contained within the macroaggregate size fraction; within this fraction most of that C is within the microaggregates within macroaggregates fraction. Soil structure is critical for recovery of soil carbon stocks and the microaggregate within macroaggregate fraction is the best diagnostic of sequestered C. ANCOVA results indicate that while the slopes of nitrous oxide efflux rates did not differ, cumulative efflux differed, though this was not related to time since restoration. Dominant grasses, such as Andropogon gerardii, can exclude subordinate species from grassland restorations. Thus, understanding changes in competition dynamics of dominant grasses could help maintain richness in grassland restorations. There may be changes in competition dynamics with whole soil conditions affected by land use history (cultivation/restoration) as plant available nutrients will decrease, microbial populations will increase, and soil structure will improve with restoration from cultivation to prairie. Using 4 soil treatments of varying land use history with four species treatments, to determine if effects are general or species specific, pairwise substitution competition experiments were conducted. Relative A. gerardii response to competition was compared among soil and species treatments using competition intensity and competition importance indices utilizing final plant biomass, relative growth rate based on maximum height, and net absolute tiller appearance rate. The experiment was conducted over 18 weeks, allowing A. gerardii to flower. A significant intensity result and significant importance results utilizing biomass measurements indicated that the 16 year restored prairie soil cause A. gerardii to be a relatively better competitor against forbs than in all other soils except for cultivated soil, likely due to positive plant-soil feedbacks. Significant importance results utilizing tiller appearance rate indicated that the cultivated and 3 year restored prairie soil caused A. gerardii to be a relatively better competitor than in the 16 year restored and never cultivated native prairie soils, likely due to changes in whole soil conditions related to land use history. There were only general soil effects, as soil treatments did not interact with species treatments. A. gerardii was a relatively better competitor against non-leguminous forbs, indicating that legumes are a better competitor for a limiting nutrient than A. gerardii or that this species is not in direct competition with legumes.

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Bhuiyan, A. B. M. Faruquzzaman. "Instream bank protection and river restoration structures." Thesis, University of East Anglia, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246951.

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Clark, Nicholas William. "Three-dimensional structural restoration of extensional fault displacements using elastic dislocation theory." Thesis, University of Liverpool, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366486.

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Sajjad, Noman. "Structural restoration of Mesozoic rifting phases in the northern North Sea." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for petroleumsteknologi og anvendt geofysikk, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-23650.

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Structural restoration has been carried out on the northern North Sea (60-62ºN), based on the reprocessed, interpreted and depth converted seismic lines NSDP84-1 and 2. Two major rifting events have previously been recognized in the area during the Mesozoic: the Permo-Triassic and Jurassic extension phases. Different structures were formed or, in some cases, the same structures were reactivated during the Permo-Triassic and Jurassic rifting phases. Permo-Triassic rifting affected a 125 km wide area from the Oygarden Fault Zone in the east to the Hutton Fault alignment in the west.. By measuring the length of the profiles before and after faulting, the restorations show that the stretching factors for upper crustal stretching during the Permo-Triassic rifting are 1.11 (11%) for NSDP84-1 and 1.10 (10%) for NSDP84-2 respectively. The Jurassic rifting was confined to a narrower zone mainly in the Viking Graben with the major faults formed on the western side of the graben. Low angle faults are identified in the western flank of Viking Graben in the Tampen Spur area. Low angle supra-basement detachments formed in the late Jurassic are found in Gullfaks area, beneath the Gullfaks Sør block and SE of the Visund fault block. Intra-basement detachments are also found in Tampen Spur area. These detachments are formed by normal faults which flatten in the basement. From the restorations, the stretching factor for the Jurassic rifting is calculated to be 1.12 (12%) for NSDP84-1 and 1.19 (19%) for NSDP84-2. The total extensions for the two rifting phases combined are 1.24 (24%) and for NSDP84-1 and 1.30 (30%) for NSDP84-2. Stretching factors (β) can also be measured by crustal thickness changes, stretching is measured before and after rifting for different area (Horda Platform, Shetland Platform, Viking Graben, and Tampen Spur), and βmean calculate for the Permo-Triassicxrifting phase are calculated 1.25 and 1.16 for NSDP84-1 and 2 respectively. For the Jurassic rifting βmean is calculated as 1.16 for NSDP84-1 and 1.17 for NSDP84-2. These values are similar to previous published results using the same methods in the Northern North Sea and represent the minimum amounts of upper crustal extension on large seismically resolved faults.

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Holland, Michele M. "Quality Control Recommendations for Structural Interventions on Historic Properties." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/31544.

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This thesis presents recommendations for controlling quality in structural interventions on historic properties. Recognizing that establishing quality in the early stages of an intervention can set the standard of quality for an entire project, these recommendations are for the first phase of an intervention, the Pre-Construction Phase. To create these recommendations, first a literature review of past and present intervention methods is conducted. After breaking down the Pre-Construction Phase first into a series of steps, and then each step into a series of details, a standard of quality is established for each detail. The available methods for conducting each detail are then analyzed. Using the literature review and the established standards of quality, recommendations are made as to which method is most appropriate for a given project. These recommendations are applied to two case studies, the structural interventions of Boykinâ s Tavern and Fallingwater. Finally, conclusions on the use of the proposed quality control recommendations are drawn, and suggestions are given for further work in this field.
Master of Science

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Heckman, John Richard. "Restoration of Degraded Land: A comparison of Structural and Functional Measurements of Recovery." Diss., Connect to this title online, 1997. http://scholar.lib.vt.edu/theses/available/etd-1416152839711171/.

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York, Audrey K. "Indiana farm structure preservation." Virtual Press, 2005. http://liblink.bsu.edu/uhtbin/catkey/1314227.

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Agriculture has played and continues to play a vital role in the livelihood of Indiana; therefore, farm structures are present in nearly every section of the state. However, with advances in technology and commercial and residential development, historic farm structures are quickly being lost to demolition and neglect. Although Indiana is known as a leader in historic preservation, historic farm structures of the state do not receive the attention that they deserve from preservationists. This thesis serves to inform preservationists of the importance of Indiana's historic farm structures and to present suggestions on ways that the current programs and activities could be improved. This is accomplished by discussing the history and current state of farming in Indiana, by examining farm structure preservation organizations in Indiana and across the nation, and by presenting farmland preservation and the documentation of rural historic districts as two alternative tools to protect historic farm structures.
Department of Architecture

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Hickman, Elizabeth L. "Improving Design Guidance for In-Stream Structures Used in Stream Restoration." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/88534.

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Vane-type in-stream structures and step pool storm conveyance (SPSC) are more ecologically friendly alternatives to traditional stream channel stabilization and stormwater conveyance techniques. Vane-type structures have been widely accepted as elements of stream restoration projects and are regularly implemented in streams throughout the United States. However, these structures commonly experience partial or total failures of function or stability, often due either to improper installation or misapplication. This study undertook a thorough review of the available design guidance for the single-arm vane, j-hook vane, cross vane, and w-weir, which revealed that the existing guidance is composed of non-standardized recommendations largely based on practitioner experience and rules of thumb. Existing guidance was synthesized with current structure research and practitioner surveys to create factsheets for each of the four structures and the SPSC, with the intent of improving structure application and offering concise general guidance. This study also endeavored to improve the design of the SPSC by determining the most accurate of several common prediction methods for Manning's roughness coefficient n, used in SPSC design velocity calculations. This was done by using Rhodamine WT dye tracer experiments to determine n values during storm flows in two SPSC structures in Annapolis, MD, which were then compared to predicted n values. Values of Manning's n determined in the SPSCs at low flows (0.28-12) often exceeded the predicted n values (-0.17-3.9) by several orders of magnitude. Though the applicability of these results is limited, an increase in design n to 0.1-0.2 is still recommended.
Master of Science
Vane-type in-stream structures are stone or wood structures installed within a stream channel for purposes such as streambank stabilization or aquatic habitat creation. Step pool storm conveyance (SPSC) is a technique which converts an existing steep stream or gully into a step-pool channel. Both of these techniques are more ecologically friendly than many traditional stream channel stabilization or stormwater conveyance techniques such as riprap or concrete storm drains. Vane-type structures in particular have been widely accepted as elements of stream restoration projects and are regularly implemented in streams throughout the United States. However, these structures commonly experience partial or total failures, either through structural collapse or failure to function properly. This is often either because they were improperly installed or because they were installed at a stream site where they were inappropriate or unnecessary. A review of the available guidance for the design of these structures revealed that the existing guidance is composed of non-standardized and sometimes contradictory recommendations which are largely based on designer trial and error and rules of thumb, rather than on the results of scientific experiments or modeling. The goal of this study was to improve the success of vane-type in-stream structures and the SPSC by providing factsheets offering clear and concise general design guidelines and sound recommendations for structure application. Flow studies of two SPSC structures in Annapolis, MD were also conducted to improve the design of that structure by measuring its flow characteristics in the field.

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Hickman, Elizabeth Louise. "Improving Design Guidance for In-Stream Structures Used in Stream Restoration." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/88534.

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Vane-type in-stream structures and step pool storm conveyance (SPSC) are more ecologically friendly alternatives to traditional stream channel stabilization and stormwater conveyance techniques. Vane-type structures have been widely accepted as elements of stream restoration projects and are regularly implemented in streams throughout the United States. However, these structures commonly experience partial or total failures of function or stability, often due either to improper installation or misapplication. This study undertook a thorough review of the available design guidance for the single-arm vane, j-hook vane, cross vane, and w-weir, which revealed that the existing guidance is composed of non-standardized recommendations largely based on practitioner experience and rules of thumb. Existing guidance was synthesized with current structure research and practitioner surveys to create factsheets for each of the four structures and the SPSC, with the intent of improving structure application and offering concise general guidance. This study also endeavored to improve the design of the SPSC by determining the most accurate of several common prediction methods for Manning's roughness coefficient n, used in SPSC design velocity calculations. This was done by using Rhodamine WT dye tracer experiments to determine n values during storm flows in two SPSC structures in Annapolis, MD, which were then compared to predicted n values. Values of Manning's n determined in the SPSCs at low flows (0.28-12) often exceeded the predicted n values (-0.17-3.9) by several orders of magnitude. Though the applicability of these results is limited, an increase in design n to 0.1-0.2 is still recommended.
Master of Science
Vane-type in-stream structures are stone or wood structures installed within a stream channel for purposes such as streambank stabilization or aquatic habitat creation. Step pool storm conveyance (SPSC) is a technique which converts an existing steep stream or gully into a step-pool channel. Both of these techniques are more ecologically friendly than many traditional stream channel stabilization or stormwater conveyance techniques such as riprap or concrete storm drains. Vane-type structures in particular have been widely accepted as elements of stream restoration projects and are regularly implemented in streams throughout the United States. However, these structures commonly experience partial or total failures, either through structural collapse or failure to function properly. This is often either because they were improperly installed or because they were installed at a stream site where they were inappropriate or unnecessary. A review of the available guidance for the design of these structures revealed that the existing guidance is composed of non-standardized and sometimes contradictory recommendations which are largely based on designer trial and error and rules of thumb, rather than on the results of scientific experiments or modeling. The goal of this study was to improve the success of vane-type in-stream structures and the SPSC by providing factsheets offering clear and concise general design guidelines and sound recommendations for structure application. Flow studies of two SPSC structures in Annapolis, MD were also conducted to improve the design of that structure by measuring its flow characteristics in the field.

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Moorhouse, Tom P. "Demography and social structure of water vole populations : implications for restoration." Thesis, University of Oxford, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.403976.

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Maerten, Frantz. "Geomechanics to solve geological structure issues : forward, inverse and restoration modeling." Thesis, Montpellier 2, 2010. http://www.theses.fr/2010MON20031.

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Différentes applications de l'élasticité linéaire en géologie structurale sont présentées dans cette thèse à travers le développement de trois types de codes numériques. Le premier utilise la modélisation directe pour étudier les déplacements et champs de contraintes autour de zones faillées complexes. On montre que l'ajout de contraintes inégalitaires, telles que la friction de Coulomb, permet d'expliquer l'angle d'initiation des dominos dans les relais extensifs. L'ajout de matériaux hétérogènes et d'optimisations, telles la parallélisation sur processeurs multi-coeurs ainsi que la réduction de complexité des modèles, permettent l'étude de modèles beaucoup plus complexes. Le second type de code numérique utilise la modélisation inverse, aussi appelée estimation de paramètres. L'inversion linéaire de déplacements sur les failles ainsi que la détermination de paléo-contraintes utilisant une approche géomécanique sont développées. Le dernier type de code numérique concerne la restoration de structures complexes plissées et faillées. Il est notamment montré qu'une telle méthode permet de vérifier l'équilibre de coupes géologiques, ainsi que de retrouver la chronologie des failles. Finalement, nous montrons que ce même code permet de lisser des horizons 3D faillés, plissés et bruités en utilisant la géomécanique
Different applications of linear elasticity in structural geology are presented in this thesis through the development of three types of numerical computer codes. The first one uses forward modeling to study displacement and perturbed stress fields around complexly faulted regions. We show that incorporating inequality constraints, such as static Coulomb friction, enables one to explain the angle of initiation of jogs in extensional relays. Adding heterogeneous material properties and optimizations, such as parallelization on multicore architectures and complexity reduction, admits more complex models. The second type deals with inverse modeling, also called parameter estimation. Linear slip inversion on faults with complex geometry, as well as paleo-stress inversion using a geomechanical approach, are developed. The last type of numerical computer code is dedicated to restoration of complexly folded and faulted structures. It is shown that this technique enables one to check balanced cross-sections, and also to retrieve fault chronology. Finally, we show that this code allows one to smooth noisy 3D interpreted faulted and folded horizons using geomechanics

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Koljonen, S. (Saija). "Ecological impacts of in-stream restoration in salmonid rivers:the role of enhanced structural complexity." Doctoral thesis, Oulun yliopisto, 2011. http://urn.fi/urn:isbn:9789514295690.

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Abstract Despite the great amount of in-stream restorations conducted in the past decades there is still a disturbing lack of knowledge about the outcome of these measures. The overall goal of this study was to assess the effect of enhanced streambed heterogeneity on the ecology of stream salmonids and stream retention efficiency. Substratum heterogeneity is often considered as one of the most important limiting factors for organisms living in running waters. Winter ecology of rivers has not been broadly studied regardless of the general belief that wintertime conditions strongly influence the survival and population size of stream salmonids. In an experimental study, the paucity of wintertime habitat in simplified channels caused temporary mass loss in age-0 trout. In late spring, channelized stream trout performed catch-up growth with potentially negative effects on long-term fitness. A management implication of this study is that increasing cover availability by in-stream restoration structures may enhance the long term success of juvenile salmonids although the short term effects were minor. Densities of salmon parr in the River Kiiminkijoki showed no response to streambed restoration. Suitable habitat area for salmon parr increased after restoration under summer conditions. However, restoration-induced benefits to winter habitats were marginal, with one study reach indicating even negative values. Most of the areas with good habitat values were located along river margins, indicating that restoration measures had only limited impact on the mid-sections of the river channel. Dredging of small streams may have caused depletion of allochthonous organic matter due to the reduction of retentive structures. In a leaf release experiment, moss cover enhanced retentiveness as well as did various restoration structures (boulders, large wood). Only a very high amount of wood clearly enhanced retention capacity. This underlines the importance of wood as an effective retention structure in headwater streams. This study indicates that habitat complexity as such may be less important than life-stage specific habitat requirements of fish (e.g. cover for overwintering salmonids). Importantly, restoration may only be successful if the measures used target the limiting factor(s) of the ecosystem or the species; for salmonids, habitat complexity does not seem to be this factor
Tiivistelmä Uiton jälkeisten kunnostustoimenpiteiden määrä Suomessa on ollut huomattava, mutta vaikutusten arviointi, pelkästään kalastonkin kannalta, on jäänyt vähäiselle huomiolle. Tässä työssä selvitettiin kunnostusten merkitystä lohen ja taimenen poikasvaiheille, huomioiden etenkin pohjan rakenteellisen monimuotoisuuden vaikutus. Työssä selvitettiin myös kunnostusten vaikutuksia lehtikarikkeen pidätyskykyyn, joka on erityisesti latvapurojen ekosysteemien tärkeimpiä perustoimintoja. Lohikalojen talviekologinen tutkimus on viime aikoihin saakka ollut vähäistä, vaikka talviolosuhteiden uskotaan rajoittavan pohjoisten virtavesien eliöstön elinmahdollisuuksia. Kokeellisessa työssä rännimäisissä uomissa talvehtiminen aiheutti taimenenpoikasille tilapäisen painon alenemisen ja nopean kompensaatiokasvun loppukeväällä. Kompensaatiokasvu voi vaikuttaa negatiivisesti koko kalan eliniän, joten kunnostusten tuoma hyöty sopivien suojapaikkojen lisääntymisenä voi edesauttaa lohikalojen pitkäaikaista menestymistä. Kiiminkijoella lohenpoikasten tiheydet eivät muuttuneet kunnostuksen myötä ja vuosien välinen vaihtelu oli kuuden vuoden seurantajaksolla huomattavan suurta. Elinympäristömallinnuksen perusteella soveltuvan elinympäristön lisäys ei ollut merkittävää, koska etenkin talviaikaisten alueiden puute jäi huomattavaksi. Suurin osa soveltuvasta elinympäristöstä sijaitsi joen reuna-alueilla, joten kunnostusvaikutus joen keskiosaan jäi odotettua pienemmäksi. Uittoperkaus on voinut johtaa latvavesien ekosysteemien köyhtymiseen maalta tulevan orgaanisen aineksen pidättymiskyvyn vähentyessä. Kokeellisen työn perusteella kuitenkin nykypäivän tilanne vuosikymmeniä uiton loppumisen jälkeen osoittautui lähes yhtä pidättäväksi kuin nykyisin käytetyt kunnostusrakenteet (kivi tai puu). Kunnostusrakenteeseen tulisi lisätä huomattava määrä puuta, jotta lehtikarike pidättyisi korkeallakin virtaamatasolla. Tulosten perusteella elinympäristöjen muuttaminen monimuotoisemmiksi ei takaa kunnostustoimien onnistumista, sillä etenkin kalapopulaatioita rajoittavat yleensä useat tekijät. Jos kuitenkin elinympäristö on populaatiota rajoittava resurssi ja sitä pystytään lisäämään (kuten talviaikaiset suojapaikat), voidaan kunnostuksella saada näkyviä tuloksia. On ilmeistä, että kunnostustoimien tulisi olla nykyistä kattavampia ja paremmin suunnattuja rajoittaviin tekijöihin, jotta tulokset näkyisivät

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Schierenbeck, Frances. "Caspar Woods Schoolhouse historic structures report." Virtual Press, 1996. http://liblink.bsu.edu/uhtbin/catkey/1014842.

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The purpose of the Historic Structures Report on the Caspar Woods one-room schoolhouse is to document the structure and provide information for its preservation and restoration. Built in 1915 by the Caspar Lumber Company, it is an excellent example of a one-room schoolhouse. Constructed during a period of reform in the education movement the Caspar Woods schoolhouse exemplifies the movements ideal of a standardized school building. This schoolhouse also has a unique feature of having been built on a support structure of skids and beams. This allowed i t to be moved i n three sections to different logging camps.The Historic Structure report looks at the history of this one-room schoolhouse, the Caspar Lumber Company and local factors that influenced the building if this school. The report also documents the existing condition of the building and provides suggestions for its preservation and restoration.
Department of Architecture

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16

Qian, Liyuan. "An interwoven visualization platform for assessing : the restoration of fragmented landscape structures." Doctoral thesis, Universitat Politècnica de Catalunya, 2016. http://hdl.handle.net/10803/404379.

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The process of landscape restoration in highly polluted areas is influenced by complex interactions between a variety of environmental elements; these are interconnected through the comprehensive medium of the landscape structure which is made up of patches, corridors and matrices. In this study, I research landscape structure using an environmental monitoring model, configured with high-definition real-time visualization, to assess the process of controlling pollution and top-soil restoration in both restored and un-restored sites. Using a unique visual environmental impact assessment platform, I evaluate a simulation from July 1999 to July 2014. I conclude that, at 5m X 5m resolution from the Unmanned Aerial Vehicle (UAV), and 30 m X 30 m resolution from the Landsat satellite (combining GIS, ENVI, Rhino and Grasshopper software), the model captures the main features of observed surface temperature, vegetation and the hydrology variation in the research site. The finer visual representation of the complex surface temperature, vegetation variables and explicit hydrology simulation at different resolutions, significantly improves the efficient and comprehensive assessment of the restoration process, in particular with regard to the visualization analysis of the structure of the damaged landscape eco-system. The change in this during the restoration process is noteworthy; the growth of the vegetation patch and the trend of the surface temperature matrix for each five years are included in the new hydrology corridor. I conclude that there is great potential for improving the precision of the environmental impact assessment platform in restoration through using high-visualization models to develop such studies in the future. 1)I first discuss an insight into the current global conditions of severely fragmented landscape structures before researching restoration of the damage caused by different disturbance conditions. Therefore, in chapter 1, the themes of fragmented patch, corridor and matrix are discussed as cases which analyze the current heavily fragmented conditions of the landscape structure, which will enable the correct environmental index to be selected for each of the different fragmented structure assessments in Chapter 3. 2)Second, I research a number of restoration responses applied to different sites, different fragmented structures and different degrees and types of disturbance. The following restoration cases in Chapter 2 show that similar types of fragmentation can result in different conditions or statuses. These include restoring fragmented areas either back to their original natural status, or to a new modified status, or in other cases using no restoration, but just applying to them a new status and consideration as works of art. In brief, I find that rules for landscape restoration may appear through experience, or even through failure, from which the right direction for future restorations may be learnt. 3)Third, for finding the right approach to landscape restoration in different cases of fragile areas affected by the growing and transformation of cities, I need to build a comprehensive visualization platform, Environmental Impact Assessment (EIA), which we can apply not only to restored areas -to assess and control the effectiveness and evolution of the actions taken and of those in progress, but also to help find out the best alternatives for those sites where no action is taken so far. and un-restored sites. Therefore, in Chapter 3, we present two practical cases where we use our visualization platform to assess and control the situation in two landfill zones both of great landscape significance and both also quite close to important cities which have lately been through intense transformation processes: the Garraf landfill landscape restoration, near Barcelona, and the monitoring and assessment of the un-restored landscape of the landfill area near Lhasa, capital of Tibet.
El proceso de restauración del paisaje en zonas altamente contaminadas se ve influido por las interacciones complejas entre varios elementos del medio ambiente; estos están interconectados a través del medio integral de la estructura del paisaje que se compone de corredores, pasillos y matrices. En este estudio, investigo la estructura del paisaje con un modelo de monitorización del medio ambiente, configurado con visualización en tiempo real de alta definición, para evaluar el proceso de control de la contaminación y la restauración de la capa superior del suelo en ambas zonas, restauradas y no restauradas. Usando una plataforma de evaluación del impacto ambiental visual unificada, evalúo una simulación a partir de julio de 1999 y julio de 2014. Llego a la conclusión de que, con 5m X 5m de resolución del vehículo aéreo no tripulado (VANT), y 30 m X 30 m de resolución del satélite Landsat (combinando SIG, ENVI, Rhino y Grasshopper), el modelo capta las principales características de temperatura de la superficie observada, la vegetación y la variación de la hidrología en la zona investigada. La representación visual más precisa de la temperatura en superficies complejas, las variaciones de la vegetación y la simulación de la hidrología explícita en diferentes grados de resolución, mejoran significativamente la evaluación eficiente e integral del proceso de restauración, en particular, en relación con el análisis de la visualización de la estructura del ecosistema del paisaje dañado. Llego así a la conclusión de que existe un gran potencial para mejorar la precisión de esta plataforma infográfica de evaluación del impacto ambiental en la restauración a través del uso de modelos de alta capacidad de visualización para desarrollar este tipo de estudios en el futuro. 1) Esta es la primera vez que se aborda en su conjunto el estado de las condiciones existentes de las estructuras del paisaje severamente afectadas, antes de investigar como reparar los daños causados por las diferentes condiciones de perturbación. Por lo tanto, en el capítulo 1, los temas del mosaico fragmentado, los corredores y la matriz se examinan como casos con los que analizar las condiciones existentes de fuerte fragmentación de la estructura del paisaje, lo que permitirá hallar el índice ambiental correcto para cada una de las diferentes evaluaciones de la estructura fragmentada en el Capítulo 3. 2) En segundo lugar, investigo una serie de las respuestas de restauración que se han aplicado a distintos lugares, estructuras fragmentadas y diferentes grados y tipos de perturbación. Los siguientes casos de restauración en el Capítulo 2 muestran que el mismo tipo de fragmentación puede dar lugar a condiciones o estados diferentes. Estos incluyen la restauración de áreas fragmentadas ya sea de vuelta a su estado natural original, o a un nuevo estado modificado, o en otros casos utilizando no la restauración sino meramente la aplicación a las mismas de un nuevo estatus como obras de arte. En resumen, me encuentro con que los criterios aplicables a la restauración del paisaje pueden aparecer a través de la experiencia, o incluso a través del fracaso, a través del cual podemos hallar la dirección correcta a seguir en futuras restauraciones. 3) En el Capítulo 3, presentamos dos casos prácticos de utilización de nuestra plataforma de visualización para evaluar la situación en dos zonas de vertedero situadas ambas en lugares de gran relevancia desde el punto de vista paisajístico y, también en los dos casos, próximos a dos ciudades importantes que han experimentado en los últimos años intensos procesos de transformación: la restauración paisajística del vertedero del Garraf, cerca de Barcelona, y la monitorización de la evolución de la zona de vertedero, aun no restaurada, en las proximidades de la ciudad de Lhasa, capital de Tibet

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Hammond, Bonny Marguerite. "The Indiana State Hospital project : the research and documentation of twenty-eight Indiana State Hospital structures." Virtual Press, 1986. http://liblink.bsu.edu/uhtbin/catkey/460294.

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The retention of historic structures and the information which they contain, the basic goals of historic preservation, has occurred with increasing frequency in the twenty-year period following the passage of the National Historic Preservation Act of 1966. Admittedly, the ideal scenario involves the retention and reuse of architecturally or historically important structures. However, occasionally notable buildings are found which are located upon sites earmarked for new construction or which have deteriorated to a condition which makes restoration or adaptive reuse not economically feasible. Adequate documentation prior to the destruction of such buildings not only preserves the information therein contained, but also may encourage reuse of some structures by making the owner aware of their contribution to the streetscape, to local history or to the architectural history of a community or region.Although parameters for adequate documentation exist at the national level for national landmarks, state and local standards are vague at best, leaving both the professional and the non-professional preservationist to determine the level of documentation and the amount of research required. Difficult at best for the professional, documentation in the absence of guidelines frequently proves disastrous for the non-professional.This thesis is the product of a documentation project conducted between September 1984 and October 1985 to provide "adequate documentation" for a client of the College of Architecture and Planning at Ball State University, Muncie, Indiana. Having no established guidelines or precedent to follow, and instructed to produce "adequate documentation" for 28 structures at six Indiana State Hospitals, the documentation team learned much during the fourteen-month process of producing both written and graphic documentation.The author presents this descriptive analysis of one component of the documentation process - the preparation of the 331-page written text which accompanied photographs and H.A.B.S. drawings. While each project differs, the Indiana State Hospital Project established a precedent which may be referred to By the C.A.P. when faced with similar projects in the future.

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Badosa, i. Salvador Anna. "Limnological characteristics and zooplankton community structure of Mediterranean coastal lagoons undergoing restoration." Doctoral thesis, Universitat de Girona, 2007. http://hdl.handle.net/10803/7869.

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Entre 1999 i 2003 es va desenvolupar un projecte Life de restauració a la maresma de La Pletera, afectada per un pla urbanització, i a la llacuna del Ter Vell, amb un elevat grau d'eutròfia (aiguamolls del Baix Ter, NE Península Ibèrica). L'objectiu d'aquesta tesi és establir el funcionament d'ambdós ecosistemes, analitzar-ne la problemàtica ambiental i avaluar els efectes de la restauració.
A la maresma de la Pletera, es va analitzar el paper de la hidrologia en la composició i dinàmica dels nutrients i del zooplàncton en cinc llacunes, tres de les quals havien estat creades dins el projecte de restauració com a nous refugis per una espècie de peix amenaçada (Aphanius iberus). La hidrologia es va caracteritzar per un llarg període de confinament sense entrades d'aigua, interromput de manera irregular per inundacions puntuals. La dinàmica del nitrogen inorgànic es va relacionar amb les entrades d'aigua, mentre que la del fòsfor, del nitrogen total i de la matèria orgànica es va relacionar amb els processos d'acumulació i reciclatge intern durant el confinament. El zooplàncton es va analitzar mitjançant la combinació d'aproximacions taxonòmiques i de mides. L'estructura de mides de la comunitat es va veure més afectada per les interaccions tròfiques (depredació i competència) mentre que l'estructura taxonòmica va ser més sensible a factors abiòtics (nutrients). El ràpid creixement de la població A. iberus en les noves llacunes va suggerir que aquestes havien proporcionat l'hàbitat adequat per a l'espècie, almenys a curt termini.
Les actuacions de restauració a la llacuna del Ter Vell es van centrar en la millora de la qualitat de l'aigua mitjançant (1) la construcció d'uns aiguamolls per depurar l'aigua d'entrada i (2) el dragat del sediment en diversos punts. Simultàniament a la restauració, però de forma independent, la gestió agrícola de l'aigua va reduir dràsticament el cabal d'entrada d'aigua dolça a la llacuna, provocant un canvi en el règim hídric. Es van analitzar els efectes a curt termini d'aquest canvi sobre la limnologia i el zooplàncton de la llacuna. Abans del canvi, la hidrologia era artificial ja que s'havia prolongat l'entrada d'aigua dolça d'acord amb la demanda agrícola, i per tant la llacuna presentava una elevada taxa de renovació de l'aigua i majors concentracions de nutrients. Després del canvi, la hidrologia va dependre més del clima, es van reduir les entrades d'aigua i es va allargar el període de confinament. La composició y dinàmica dels nutrients va tendir a assemblar-se a l'observada a les llacunes de la maresma, mentre que la comunitat del zooplàncton no ho va fer. L'estat ecològic de la llacuna va millorar després del canvi en el règim hídric.
Between 1999 and 2003, a restoration Life project was developed in La Pletera salt marshes, affected by an urbanisation plan, and in the Ter Vell lagoon, a highly eutrophic lagoon (Baix Ter Wetlands, NE Iberian Peninsula). The aim of this thesis is to establish the natural functioning of both ecosystems, analyze their environmental problematic and also to evaluate the effects of the restoration measures.
In La Pletera salt marshes, the role of the hydrological regime in the nutrient and zooplankton composition and dynamics was analysed in five brackish lagoons. Three of them were created in the framework of the restoration project as new refuges for an endangered fish species (A. iberus). The hydrology was determined by a prolonged period of confinement without water inputs, irregularly interrupted by sudden flooding events. While the dynamics of inorganic nitrogen depended on the water inputs variability, dynamics of phosphorus, total nitrogen and organic matter was related more to the cumulative mechanisms and internal recycling during the confinement periods. The zooplankton community structure was analysed by means of the combination of taxon- and size-based approaches. Whereas the community size structure was more affected by trophic interactions (predation and competition), the taxonomic structure appeared to be more sensitive to abiotic factors (nutrients). The fast growth of the size population of A. iberus in the new lagoons suggested that they had provided a suitable refuge for this species, at least in the short-term.
Restoration actions in the Ter Vell lagoon were focused on the improvement of the water quality by means of (1) wetlands construction to reduce nutrient inputs and (2) sediment dredging. Simultaneously, but independent of the restoration activities, water management in agriculture drastically reduced the freshwater inflow to the lagoon and, therefore, changed the hydrological regime. The short-term effects of this hydrological change on the limnological characteristics and the zooplankton of the lagoon were analysed. Before the change, the hydrology was artificial since the freshwater flooding period was prolonged due to the high agricultural demand. As a result, the lagoon showed a high water turnover rate and high nutrient concentrations. After the change, hydrology was climate-dependent, with scarce water inputs and prolonged confinement periods. Then, the nutrient composition and dynamics tended to be more similar to those observed in the salt marsh lagoons. However, zooplankton did not tend to resemble to that of the salt marsh lagoons. The ecological status of the Ter Vell lagoon was improved after the hydrological change.

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19

Brudvig, Lars Andrew. "Effects of restoration on Midwestern oak savanna biodiversity, structure, and oak regeneration." [Ames, Iowa : Iowa State University], 2007.

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20

Bui, Manh Hung. "Structure and restoration of natural secondary forests in the Central Highlands, Vietnam." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-216210.

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Introduction and objectives In Vietnam, the forest resources have been declining and degrading severely in recent years. The degradation has decreased the natural forest area, changed the forest structure seriously and reduced timber volume and biodiversity. From 1999 to 2005, the rich forest area has decreased 10.2%, whereas the poor secondary forest has increased dramatically by 20.7%. Forest structure plays an important role in forestry research. Understanding forest structure will unlock an understanding of the history, function and future of a forest ecosystem (Spies, 1998). The forest structure is an excellent basis for restoration measures. Therefore, this research is necessary to contribute to improving forest area and quality, reducing difficulties in forest management. The study also enhances the grasp of forest structure, structure changes after harvesting and fills serious gaps in knowledge. In addition, the research results will contribute to improving and rescuing the poor secondary forest and restoring it, approaching the old-growth forest in Vietnam. Material and methods The study was conducted in Kon Ka Kinh national park. The park is located in the Northeastern region of Gia Lai province, 50 km from Pleiku city center to the Northeast. The park is distributed over seven different communes in three districts: K’Bang, Mang Yang and Đăk Đoa. Data were collected from 10 plots of secondary forests (Type IIb) and 10 plots of primeval forests (Type IV). Stratified random sampling was applied to select plot locations. 1 ha plots were used to investigate gaps. 2000 m2 plots were used to measure overstorey trees such as diameter at breast height, total height, crown width and species names. 500 m2 subplots were used to record tree positions. For regeneration, 25 systematic 4 m2 subplots were established inside 1 ha plots. After data were collected in the field, data analyses were conducted by using R and Excel. Firstly, some stand information, such as density, volume and so on, was calculated, and then descriptive statistics were computed for diameter and height variables. Linear mixed effect models were applied to analyze the difference of diameter and height and to check the effect of random factor between the two forest types. Diameter and height frequency distributions were also generated and compared by using permutational analysis of variance (PERMANOVA). Non-linear regression models were analyzed for diameter and height variables. Similar analyses were implemented for gaps. Regarding spatial point patterns of overstorey trees, replicated point pattern analysis techniques were applied in this research. For biodiversity, some calculations were run such as richness and biodiversity indices, comparison of biodiversity indices by using linear mixed models and biodiversity differences between two forest types tested again by permutational analysis of variance. In terms of regeneration, some analyses were implemented such as: height frequency distribution generation, frequency difference testing, biodiversity indices for the regeneration and spatial distribution checking by using a nonrandomness index. Results and discussion After analyzing the data, some essential findings were obtained as follows: Hypothesis H1 “The overstorey structure of secondary forests is more homogeneous and uniform than old-growth forests” is accepted. In other words, the secondary forest density is about 1.8 times higher than the jungle. However, the volume is only 0.56 times as large. The average diameter and height of the secondary forest is smaller by 5.71 cm and 3.73 m than the old-growth forest, respectively. Linear mixed effect model results indicate that this difference is statistically different and the effect of the random factor (Section) is not important. Type IIb has many small trees and the diameter frequency distribution is quite homogeneous. The old-growth forest has more big trees. For both forest stages, the height frequency distribution is positively skewed. PERMANOVA results illustrate that the frequency distribution is statistically different between the two forest types. Regression functions are also more variant and diverse in the old-growth forest, because all standard deviations of the parameters are greater there. Gap analysis results indicate that the number of gaps in the young forest is slightly higher, while the average gap size is much smaller. The gap frequency distribution is statistically different between the two types. In terms of the spatial point pattern of overlayer trees, the G-test and the pair correlation function results show that trees distribute randomly in the secondary forest. In contrast, the spatial point patterns of trees are more regular and diverse in the old-growth forest. The spatial point pattern difference is not significant, and this is proved by a permutational t-test for pair correlation function (pcf). Envelope function results indicate that the variation of pcf in young forests is much lower than in the primary forests. Hypothesis H2 “The overstorey species biodiversity of the secondary forest is less than in the old-growth forest” is rejected. Results show that the number of species of the secondary forest is much greater than in the old-growth forest, especially richness. The richness of the secondary forest is 1.16 times higher. The Simpson and Shannon indices are slightly smaller in the secondary forest. The average Simpson index for both forest stages is 0.898 and 0.920, respectively. However, the difference is not significant. Species accumulation curves become relatively flatter on the right, meaning a reasonable number of plots have been observed. Estimated number of species from accumulation curves in two forest types are 105 and 95/ha. PERMANOVA results show that number of species and proportion of individuals in each species are significantly different between forest types. Hypothesis H3 “The number regenerating species of the secondary forest is less and they distribute more regularly, compared to the old-growth forest” is rejected. There are both similarities and differences between the two types. The regeneration density of the stage IIb is 22,930 seedlings/ha, greater than the old forest by 9,030 seedlings. The height frequency distribution shows a decreasing trend. Similar to overstorey, the richness of the secondary forest is 141 species, higher than the old-growth forest by 9 species. Biodiversity indices are not statistically different between two types. PERMANOVA results indicate that the number of species and the proportion of individuals for each species are also not significantly different from observed forest types. Nonrandomness index results show that the regeneration distributes regularly. Up to 95% of the plots reflect this distribution trend. Hypothesis H4 “Restoration measures (with and without human intervention) could be implemented in the regenerating forest” is accepted. The investigated results show that the secondary forest still has mother trees, and it has enough seedlings to restore. Therefore, restoration solutions with and without human intervention can be implemented. Firstly, forest protection should be applied. This measure is relevant to national park regulations in Vietnam. Rangers and other related organizations will be responsible for carrying out protection activities. These activities will protect forest resources from illegal logging, grazing and tourist activities. Environmental education and awareness-raising activities for indigenous people is also important. Another measure is additional and enrichment planting. It should focus on exclusive species of the overstorey in Type IIb or exclusive species of the primary forest. Selection of these species will lead to species biodiversity increase in the future. This also meets the purpose of the maximum biodiversity solution. Conclusion Forest resources play a very important role in human life as well as maintaining the sustainability of ecosystems. However, at present, they are under serious threat, particularly in Vietnam. Central Highland, Vietnam, where forest resources are still relatively good, is also threatened by illegal logging, lack of knowledge of people and so on. Therefore, it needs the hands of the people, especially foresters and researchers. Through research, scientists can provide the knowledge and understanding of the forest, including the structure and forest restoration. This study has obtained important findings. The secondary forest is more homogeneous and uniform, while the old-growth forest is very diverse. Biodiversity of the overstorey in the secondary forest is more than the primary. The number of regenerating species in the secondary forest is higher, but other indices are not statistically different between two types. The regeneration distribute regularly on the ground. The secondary forest still has mother trees and sufficient regeneration, so some restoration measures can be applied here. Findings of the study contribute to improve people’s understanding of the structure and the structural changes after harvesting in Kon Ka Kinh national park, Gia Lai. That is a key to have better understandings of the history and values of the forests. These findings and the proposed restoration measures address rescuing degraded forests in Central Highland in particular and Vietnam in general. And further, this is a promising basis for the management and sustainable use of forest resources in the future.

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Phelps, James Denzil. "The development of an organizational structure for the Bible School /." Theological Research Exchange Network (TREN), 1985. http://www.tren.com.

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Shackleton, John Ryan. "Numerical Modeling of Fracturing in Non-Cylindrical Folds: Case Studies in Fracture Prediction Using Structural Restoration." Amherst, Mass. : University of Massachusetts Amherst, 2009. http://scholarworks.umass.edu/open_access_dissertations/82/.

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Goldenberg, Ellen Dignon. "Outplanted Acropora cervicornis enhances the fish assemblages of Southeast Florida." Thesis, NSUWorks, 2019. https://nsuworks.nova.edu/occ_stuetd/507.

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Acropora cervicornis, commonly known as the staghorn coral has historically been a major contributor to reef structural complexity, providing habitat for many functionally important fish species throughout Florida and the Caribbean. Unfortunately, due to disease, bleaching, and local anthropogenic stressors, A. cervicornis populations have suffered drastic declines that have negatively impacted associated reef fish populations. In order to promote recovery, A. cervicornis fragments can be cultivated in nurseries and outplanted back onto reefs. This practice can effectively increase A. cervicornis abundance, but the long-term effects on local fish assemblages, and specifically functionally important grazing fishes, has not been assessed. Fish assemblages at natural (control) sites were compared to outplanted A. cervicornis sites in Southeast Florida. Fish surveys were conducted each summer at four locations from 2012 to 2017. Each location contained three outplanted A. cervicornis and one or two control sites. Outplant sites were defined by 50 A. cervicornis colonies in a 36 m2 area. Control sites occupied the same area but did not contain outplanted colonies. The fish assemblage structure was assessed in terms of composition, demography, and functional temporal trends as well as with the increasing structural complexity of the outplanted corals, defined as total linear extension (TLE). Significant temporal trends were recorded for total fish abundance, grazer abundance, and diversity. Structural complexity (outplanted A. cervicornis measured in TLE m-2) was found to be a significant predictor of total fish abundance, grazer abundance and diversity. Fishes 2-5 cm total length were most numerous indicating that the outplant sites may be providing habitat for juvenile reef fishes, particularly algae consumers. These findings suggest that A. cervicornis restoration may be creating a positive feedback loop in which outplanted corals create habitat for grazing fishes that in turn reduce algae competition, potentially providing new habitat for coral settlement.

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Aunins, Aaron. "Genetic evaluation of American shad Alosa sapidissima restoration success in James River, Virginia." VCU Scholars Compass, 2010. http://scholarscompass.vcu.edu/etd/164.

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The American shad Alosa sapidissima has experienced severe declines throughout its native range due to habitat degradation, fragmentation, and over-fishing. Hatchery supplementation is often used for stock restoration, but the effects of supplementation on population structure and genetic diversity are rarely assessed. This study employed molecular markers to evaluate how supplementation of the James River American shad population with Pamunkey River origin larvae since 1994 has impacted genetic diversity and population structure. Population genetic parameters of other major Chesapeake Bay tributaries (Susquehanna, Rappahannock, Potomac, and Nanticoke) also were characterized. Prior to stocking, the James and Pamunkey populations exhibited subtle genetic differentiation, which was absent among post-supplementation samples, presumably due to the stockings. A similar situation was observed among other shad populations of Chesapeake Bay tributaries which were subtly differentiated in the 1990s but lacked any credible among-population differentiation among contemporary samples. Genetic diversity of the James River shad population was high prior to stocking, and remained high throughout years of intensive supplementation, yet the current population decline suggests that the James River shad population still has not recovered. Despite harvest curtailment, elimination of the ocean intercept fishery, and widespread supplementation efforts, Chesapeake Bay tributary American shad populations are collectively at their lowest levels in recorded history. Therefore, success of other restoration goals such as creation of fish passage in James River was investigated in a concurrent radio telemetry study to assess passage at Bosher's Dam fishway. Ninety-four American shad were radio-tagged on the spawning grounds below Bosher's Dam. Approximately one-half of the tagged shad were detected at the escapement receiver within 24 hours after tagging, and the average residence times of remaining shad were approximately one week. No tagged shad were detected above Bosher's Dam. These results imply that restricted passage through Bosher's Dam fishway may be an important factor in the failure of James River American shad to recover. Therefore, improving passage at migratory barriers such as Bosher's Dam, in conjunction with a continued Bay-wide fishing moratorium, may be more beneficial to shad restoration efforts in James and other Chesapeake Bay tributaries than continued supplementation.

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Titeux, Marc-Olivier. "Restauration et incertitudes structurales : changement d'échelles des propriétés mécaniques et gestion de la tectonique salifère." Phd thesis, Institut National Polytechnique de Lorraine - INPL, 2009. http://tel.archives-ouvertes.fr/tel-00454607.

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Un des objectifs de la restauration structurale, sujet de cette thèse, est de mettre en évidence les défauts d'interprétation ou les zones potentiellement fracturées. L'extension de cette technique en volume nécessite la définition a priori des propriétés des matériaux utilisés, notamment lorsque ces propriétés sont définies à une échelle fine. Une première partie, ce travail propose une méthode de mise à l'échelle des propriétés mécaniques utilisées pour les calculs de restauration en volume. La principale hypothèse repose sur la loi de comportement utilisée pour les matériaux définis à l'échelle grossière, supposés isotropiques transverses élastiques. Le calcul des propriétés équivalentes se fait par identification, après simulation par Éléments Finis. Cette technique a l'avantage d'assurer la conservation de l'énergie pour le même type de chargement. Dans une dernière partie, ce travail traite la gestion de la tectonique salifère lors de la restauration structurale. Les diapirs de sel présentent des topologies, des rhéologies, et des séquences de dépôt très caractéristiques. Ce mémoire présente une méthodologie de restauration multi-cartes, dont la prise en compte des relations inter-horizons est respectée dans les séquences halocinétiques. Une application de cette méthode est présentée sur le bassin de La Popa (Mexique) où les différentes interprétations réalisées au travers de leurs restaurations sont comparées

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Hassan, Ahmed Mai. "Discovery and restoration of aberrant nuclear structure and genome behaviour in breast cancer cells." Thesis, Brunel University, 2013. http://bura.brunel.ac.uk/handle/2438/8847.

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The eukaryotic interphase nucleus is well organised and the genome positioned non-randomly. Nuclear structure is an important regulator of genome behaviour and function. Genome organisation and nuclear structure are compromised in diseases such as cancer and laminopathies. This study was to find out and to determine if there is any functional relationship between nuclear structure and genome mis-organisation in cancer cells. I have assessed the presence and distribution of specific nuclear structural proteins (A-type, B-type lamins and its receptor LBR, many of their binding proteins such as MAN1, LAP2α, LAP2, and Emerin and other nuclear proteins (PML, Nucleolin, and Ki67) using indirect immunofluorescence. From this study, it is found that the nuclear structure of breast cancer cells is often altered. The most severely affected proteins are the nuclear lamins B1 and B2 and they found as large foci within the nucleoplasm with little LBR expression to localise the lamin B. I also assessed the chromosome positioning (HSA 7, 10, 11, 14 and 17) and gene positioning (AKT1, CCND1, HSP90AA1, EGFR, ERRBB2/HER2 and PTEN) in breast cancer cell lines (T-47D, GI-101, Sk-Br-3 and BT-474) and in normal breast cell lines (MCF-10A) using 2D-FISH technique. I also assessed the position of the genes in nuclei and correlated with gene expression using qRT-PCR. Breast cell lines have treated with a drug named lovastatin and it was found that the cells have restored LBR expression and localisation of lamin B, leading to altered gene positioning and changed expression of breast cancer genes. Since the drug (lovastatin, 12 μM/48 hours) affects the prenylation as a post-translation modification process and lamins B biosythensis, it is found that B-type lamins and its receptor expression and distribution were improved and increased in expression by 2-fold in expression levels in the most affected cells (T-47D, and BT-474) compared to the normal cells (MCF-10A) and these cells also showed abnormal nuclei and dead cells. When analysing the nuclear positioning of the genes (AKT1, HSP90AA1 and ERRBB2/HER2), it is found that AKT1 was positioned periphery in BT-474 and T-47D cells and interiorly in the normal cells (MCF-10A) before treatment whereas the same gene was positioned periphery in T-47D and MCF-10A cells and interiorly in BT-474 after treatment with lovastatin. It is also found that HSP90AA1 was positioned periphery in MCF-10A and T-47D cells and interiorly in BT-474 cells before and after treatment (no change). Moreover, ERRBB2/HER2 gene was positioned periphery in T-47D and BT-474 cells and interiorly in MCF-10A cells before treatment whereas the same gene was positioned periphery in MCF-10A and T-47D cells and interiorly in BT-474 after treatment with the same drug. Regarding LMNB1, LMNB2, and LBR genes, the study focussed only on their expression levels and no work has done on their chromosome positioning as well as gene position before and after treatment. These three genes were over expressed when assessed by measuring the relative and fold changes in expression. Therefore, it is suggestive that 2D-FISH experiment to assess their localisation and their specific chromosome territories is required. The results shown in this thesis demonstrate the importance and roles of nuclear architecture specifically nuclear lamins and the integral nuclear membrane proteins (B-type lamins and LBR) in mediating correct genome organisation and function. The breast normal (immortalised cells) and cancerous cell lines showed different nuclear structures as lamin B affect the position of specific target chromosomes and genes. These results will strength the finding that the nuclear lamina is a significant nuclear structure which associates, organises, and regulates numerous vital nuclear processes and the stability of the genome.

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Radspinner, Robert Ryan. "Development of Design Guidelines for In-Stream Flow Control Structures." Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/32334.

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The use of in-stream flow control structures for channel stabilization has become increasingly popular due to its potential cost-effectiveness and ecological benefits. These structures help to protect the bank from erosion and lateral migration. However, a large number of these projects fail due to inadequate design guidelines. This study aims to create authoritative design guidelines which are based on hydraulic and physical criteria attributed to the channel reach. In this report, some of the most common types of in-stream structures have been reviewed and results from a practitioner experience survey have been analyzed. This research has allowed for the selection of the most promising structures which will be studied later in the project.
Master of Science

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Teitelbaum, Heather K. Walker Mary P. "Effects of simulated functional loading conditions on dentin, composite, and laminate structures." Diss., UMK access, 2007.

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Thesis (Ph. D.)--School of Dentistry. University of Missouri--Kansas City, 2007.
"A dissertation in oral biology and engineering." Advisor: Mary P. Walker. Typescript. Vita. Title from "catalog record" of the print edition Description based on contents viewed July 30, 2008. Includes bibliographical references (leaves 110-126). Online version of the print edition.

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Almeida, Danilo Roberti Alves de. "Assessing tropical forest degradation and restoration through lidar remote sensing." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/11/11150/tde-20032019-162242/.

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The present study investigates new frontiers of lidar technology knowledge assessessing of tropical forest degradation and restoration. The thesis is structured with an introductory chapter, four technical chapters, which explored technical and scientific aspects of the application of lidar technology to the evaluation of forest degradation in the Amazon and restoration of forests in the Atlantic Forest, and a final chapter with considerations and a summary of the main scientific results obtained in this thesis. The results of chapter 2 provided important insights for the correct modeling of leaf area density (LAD) proflies profiles usind airborne lidar. LAD profile is the decomposition of the leaf area index (LAI) along the vertical canopy profile and can be used to answer many ecological questions. The results of chapter 2 provided important insights for the correct modeling of LAD profiles. Chapter 3, using lidar data on aerial and portable ground platforms, in the Biological Dynamics of Forest Fragments Project (BDFFP), demonstrated in an unprecedented way the effect of forest fragmentation in the canopy structure (lidar-derived) and their relationships with the change of the tree community. In this chapter, the results showed that the lidar technology has enormous potential to monitor the impact of forest fragmentation in a high precision scale for large areas. Chapter 4, using data from several forest typologies in the Atlantic Forest biome restoration collect by a portable ground lidar system, demonstrated the potential of canopy structural attributes to distinguish different forest typologies and to estimate above ground woody dry biomass. However, the results were not positive for estimating tree community diversity (richness, Shannon index and species composition). Finally, chapter 5 demonstrated the potential of a novel lidar system on a drone platform (also known as UAV - unmanned aerial vehicle) to monitor forest restoration plantations. Lidar is revolutionizing the way we measure forest landscapes and can be an indispensable tool for the success of forest restoration projects, having the potential to support on planning, monitoring and inspection of forest restoration landscapes. In this thesis, we demonstrate several applications of remote sensing to address the context of forest restoration, and we established methodological bases for other studies to expand the use of this technology for decision making in tropical forest conservation, management and restoration.
O presente estudo investiga novas fronteiras do conhecimento da aplicação da tecnologia de sensoriamento remoto lidar à avaliação da degradação e restauração de florestas tropicais. A tese está estruturada na forma de um capítulo de introdução, quatro capítulos técnicos, que exploraram aspectos técnicos e científicos da aplicação da tecnologia lidar à avaliação da degradação de florestas na Amazônia e restauração de florestas na Mata Atlântica, e de um capítulo final com considerações gerais e uma síntese dos principais resultados científicos obtidos nesta tese. O capítulo 2, utilizando dados lidar aeroembarcados em avião, analisou uma questão técnica, sobre a influência da densidade de pulsos da nuvem lidar e da resolução de amostragem para a modelagem do perfil de densidade de áerea foliar em florestas tropicais (DAF). O perfil de DAF é a decomposição do índice de área foliar (IAF) ao longo do perfil vertical do dossel e pode ser utilizado para responder diversas questões ecológicas. Os resultados da capítulo 2 trouxeram importantes insights para a correta modelagem dos perfis de DAF. O capítulo 3, utilizando dados lidar em plataformas aeroembarcados e terrestre portátil, no Projeto Dinâmica Biologica de Fragmentos Florestais (PDBFF), demonstrou de maneira inédita o efeito da fragmentação florestal sobre a alteração da estrutura do dossel (derivados de dados lidar) e suas relações com a mudança da comunidade arbórea. Neste capítulo os resultados demonstraram que a tecnologia lidar tem enorme potencial para monitorar o impacto da fragmentação florestal para grandes áreas e em fina escala. O capítulo 4, utilizando dados de diversas tipologias florestais em restauração no bioma Mata Atlântica, a partir de um sistema lidar terrestre portátil, demonstrou a capacidade dos atributos estruturais do dossel em distinguir diferentes tipologias florestais, estimar diversidade e biomassa de madeira acima do solo. Contudo, os resultados não foram muito positivos para estimativa da diversidade da comunidade arbórea (riqueza, indice de Shannon e composição de espécies). Finalmente, o capitulo 5 demonstrou a capacidade de um sistema inovador lidar aeroembarcado em uma plataforma drone (também conhecida como VANT - veículo aéreo não tripulado) para monitorar plantios de restauração florestal. O lidar está revolucionando a maneira de mensurarmos as paisagens florestais, podendo ser uma ferramenta imprecindível para o sucesso dos projetos de restauração florestal em larga escala, tendo o potencial de auxiliar desde o planejamento ao monitoramento e fiscalização dos projetos florestais. Nesta tese, demonstramos diversas aplicações do sensoriamento remoto lidar ao contexto da restauração florestal, e estabelecemos bases metodológicas para que outros estudos expandam o uso desta tecnologia para tomada de decisão na conservação, manejo e restauração de florestas tropicias.

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Kaya, Fuat Emre. "Applications of Additive Manufacturing in Construction and Historic Building Restoration/Rehabilitation." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/22784/.

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The term “Additive Manufacturing” is described as the layered production of parts from a 3D file. Over the past century, this technology has evolved from a complement tool for conventional product development into an independent production method. Whereas high technology industries such as aerospace and medicine were already embraced additive manufacturing, structural engineering and architecture are lagging. Additive manufacturing has the potential to revolutionize the construction and restoration of historic buildings, with foreseeable benefits including highly complex and efficient structures with the reduction in material use and wastage, streamlining and expedition of the design-build process, improved customization. However, there are also challenges and demands: a new way of thinking for design and verifications for stability and serviceability of printed elements, the cost, the need for well-educated engineers. In this dissertation, the current state of additive manufacturing in construction and historic building restoration/rehabilitation is reviewed as a combination of qualitative and quantitative-based studies. The research aims to give confidence to additive manufacturing applicability in these fields and stimulate further research. The opportunities and challenges are discussed by analysing concrete, polymer, and metal-based processes and their applications of additive manufacturing in the construction sector. A review of structural and non-structural applications in restoration projects, possible future applications in terms of structural strengthening are analysed and opportunities and challenges are identified and discussed. Based on the literature review and experimental lab tests, the outcome was obtained as the tensile mechanical properties are adequate for structural engineering applications. However, further interdisciplinary research on additive manufacturing is necessary to build confidence in structural engineers and architects.

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Smith, Benjamin Servais. "On the Design of Instream Structures in the Mid-Atlantic United States: An Investigation of the Design, Project, and Watershed Factors that Affect Structure Success." Thesis, Virginia Tech, 2021. http://hdl.handle.net/10919/103390.

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Instream structures are used to reinforce channel margins, redirect flows, and create habitat, but there is little consensus about their design or whether they function as intended. In this study, 536 instream structures in the state of Maryland were assessed to determine the effect of structure-, project-, and watershed-scale factors on performance. Structures were assessed using a 19 point scoring system based on structural stability, sediment transport, and overall function. Structure-scale variables related to the construction, geometry, and placement, and differed for six structure families: bank protection (BP), full and partial span vanes (FSV), constructed riffles (RF), regenerative stream conveyances, and step pools. Project- and watershed-scale variables related to flow, erosion resistance, and design approach. Relationships between structure scores and explanatory variables were evaluated using regression analysis. Structure performance was strongly influenced by the individual project, suggesting that design quality, construction, and maintenance are as important as specific design features. Structure durability decreased if there was additional urban development following construction. Results also indicated that restoration activities have a "protective effect" on nearby structures. For rock BP, imbricated rock walls performed better than stone toe, due to increased structure height and boulder size. Rock FSVs that were keyed into the bank at angles between 35° and 90° were more durable, while RFs performed best when constructed using downstream grade control and increased substrate depth. The results of this study provide insight into design and project features that contribute to structure success.
Master of Science
Stream restoration aims to rehabilitate streams that have been impacted by humans, and log or rock structures in the channel are utilized to protect the bed and banks, redirect water away from the banks, and create habitat for aquatic organisms. However, there are few design standards for these structures. In this study, 536 instream structures in the state of Maryland were assessed to determine the effect of design and site characteristics on performance. Structures were scored for performance based on structural stability, sedimentation, erosion, and function. Design characteristics related to structure construction and placement, while site conditions related to the project and watershed characteristics. Statistical analyses were used to determine the relationship between structure performance and design and site characteristics. Structure performance was strongly influenced by the restoration project, indicating that design quality, construction, and maintenance are as important as specific design features. Structure durability decreased if there was additional urban development in the watershed following construction. Results also indicated that when structures were used in series, there was a "protective effect" on other nearby structures. Rock walls performed better as height increased, while rock weirs that were constructed into the streambank between 35° and 90° were more durable. These results provide insight into design and project features that contribute to structure success.

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32

Branigin, Susan R. "The 1999 restoration of the 1941 New Harmony Labyrinth Temple." Virtual Press, 2006. http://liblink.bsu.edu/uhtbin/catkey/1355261.

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The purpose of this thesis is to examine the integration of modern historic preservation laws, ethics, and techniques with the practical management of historic sites. The planned restoration (1999-2001) of the New Harmony, Indiana Labyrinth Temple by its managing entity, Historic New Harmony, provided an opportunity for the investigation of questions relevant to the application, in terms of accepted historic preservation practices, of the correct preservation treatment of state-owned cultural resources. A central question of this thesis was whether early New Harmony preservation efforts deemed by some to be more "historicism" than "history" possessed actual historical value. Of further interest was the relationship between implementation of the correct preservation treatment at the subject historic site and the resultant effects of that treatment upon its historic interpretation to the visiting public.This thesis examines the activity of the first New Harmony Memorial Commission in late-1930s/early 1940s New Harmony, Indiana. To provide context for the New Harmony activity, contemporaneous national and state preservation efforts are also studied.The thesis also examines Historic New Harmony's initial plan to restore the Labyrinth Temple. Failures of that initial plan include omission of basic historic preservation principles, specifically the lack of required regulatory oversight of the planned activity by the Indiana SHPO's office (Section 106 compliance). The "restoration" plan developed by Historic New Harmony advocated the implementation of incorrect treatments of the Temple's structural components, decorative elements, and interpretive signage. In effect, Historic New Harmony's restoration plan was more "historicism" than "historic preservation."This investigation of the Labyrinth Temple finds contextual validity in the preservation activity of the first New Harmony Memorial Commission, as well as relevance of that activity to the history of Indiana's historic preservation movement. These facts, in consideration with other factors, are reflected in the development herein of a procedurally correct project plan based on historic preservation laws, ethics, and techniques, as well as the inclusion of the historic site's entire story.
Department of Architecture

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33

Naficy, Cameron Edwards. "Changes in forest structure and composition associated with unique land use histories: Implications for restoration." The University of Montana, 2009. http://etd.lib.umt.edu/theses/available/etd-12012008-173306/.

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Many contemporary semi-arid forests of western North America are denser and have a greater proportion of shade tolerant species relative to pre- Euro-American settlement. While many causes have been invoked to explain these changes, the active suppression of fire since the early 1900s has been the most widely studied and cited. However, widespread logging in western North American forests has often predated effective fire suppression and has affected a majority of semi-arid forests. The extent to which historical logging has contributed to uncharacteristically high densities and other changes in contemporary forests have never been adequately quantified. Therefore, true elucidation of the causes of departures of contemporary forests relative to historical conditions may be incomplete. I studied ponderosa pine/Douglas-fir forests of the Northern Rockies to address four main questions: 1) has historical logging exacerbated the effects of fire exclusion on forest density, structure and species composition?, 2) What is the magnitude of this change relative to that due to fire exclusion alone?, 3) in the absence of fire, which structural components in unlogged vs. historically logged stands are mostly responsible for deviations from reference ranges of variability?, and 4) what is the magnitude of such deviation in logged vs. unlogged forests? Based on a paired design (n=23 pairs) of logged, fire excluded stands with unlogged, fire excluded stands I found that fire excluded, logged stands were twice as dense as fire excluded, unlogged stands, and had higher numbers of small living and dead trees. While unlogged fire excluded forests generally experienced minimal to no departures relative to the range of stand densities observed in reference, fire-maintained stands, most logged fire excluded forests experienced substantial departures. Responses to the interaction of logging and fire exclusion varied by habitat type, with significant departures in Douglas-fir but not in ponderosa pine habitat types. The magnitude of the response was proportional to the intensity of historical logging. We suggest that unique restoration approaches are warranted for unlogged and logged, fire excluded forests and caution that fuel reduction and restoration policies which do not account for the legacy of logging may be ineffective in accomplishing their desired goals.

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34

Orzetti, Leslie LuChar. "Stream community structure an analysis of riparian forest buffer restoration in the Chesapeake Bay watershed /." Full text available online (restricted access), 2004. http://images.lib.monash.edu.au/ts/theses/Orzetti.pdf.

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35

Querard, Alexandra Eurith. "On the art of historia : the restoration and extension of the Casa del Mantegna." Thesis, Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/23733.

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Brooks, Kristen Elise. "Comparing Reach Scale Hyporheic Exchange and Denitrification Induced by Instream Restoration Structures and Natural Streambed Morphology." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/78326.

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A common water quality issue is an excess of nutrients which can lead to problems such as eutrophication. Stream restoration is one method by which improvements in water quality may be attempted. One strategy is increasing hyporheic zone flow at baseflow by addition of instream structures. The hyporheic zone can be an area of increased biogeochemical activity, with potential enhancement of reactions such as denitrification. However, the comparative effects of various instream restoration techniques, as well as the role of watershed setting and corresponding environmental characteristics in which restoration occurs (e.g., hydraulic conductivity, stream slope), are still poorly understood. In this study we numerically modeled groundwater and surface water interaction in a 200 m second order stream reach in southwestern Virginia using MIKE SHE. We calibrated the model to hydrologic and tracer data available during field tests of restoration techniques. We then simulated different types of instream restoration techniques (e.g., fully and partially channel-spanning weirs and buried structures), and varied hydrologic and biogeochemical controlling factors driven by watershed setting. The measured effects for this sensitivity analysis were direction and magnitude of surface water-groundwater exchange and amount of denitrification. We found that factors related to watershed setting had the greatest effect on surface water-groundwater exchange and on denitrification, including streambed hydraulic conductivity, natural or background stream topography and slope, and groundwater levels. Type and number of instream structures also influenced surface water-groundwater exchange and denitrification, but to a lesser degree, and the effect of structures was in turn controlled by watershed setting. Watershed setting was thus the largest control, both on exchange overall, and the effectiveness of structures. Human effects on watersheds such as agriculture and urbanization therefore likely play a role in whether reach-scale restoration practices succeed in achieving water quality goals. More broadly, restoration efforts at the watershed scale itself, such as reducing fertilizer use or improving stormwater management, may be necessary to achieve ambitious water quality goals. Nevertheless, reach-scale restoration efforts such as in-stream structures may play a useful role in certain watershed settings. Furthermore, other reach-scale restoration techniques that affect streambed topography, such as addition of pool-riffle sequences, may be more effective, and bear investigation.
Master of Science

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37

Hines, Stacy Lynn. "The effects of restoration structures on nutrient uptake and macroinvertebrate communities in restored urban streams in Greensboro, North Carolina." Greensboro, N.C. : University of North Carolina at Greensboro, 2007. http://libres.uncg.edu/edocs/etd/1502Hines/umi-uncg-1502.pdf.

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Thesis (M.S.)--University of North Carolina at Greensboro, 2007.
Title from PDF t.p. (viewed Mar. 10, 2008). Directed by Anne E. Hershey; submitted to the Dept. of Biology. Includes bibliographical references (p. 33-39).

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Barnes, Andrew David. "The Impact of Edge Effects & Matrix Restoration on Dung Beetle Community Structure & Ecosystem Function." Thesis, University of Canterbury. Biological Sciences, 2011. http://hdl.handle.net/10092/6265.

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Land-use change has become a force of global importance and has gained status as the most important driver of ecosystem degradation. The resulting creation of habitat edges has pervasive impacts on the distribution and persistence of species in forest ecosystems. Responses of species to edge effects can be highly dependent on ‘response’ traits, which may in turn co-vary with ‘effect’ traits that determine rates of ecosystem functioning. Therefore, non-random loss of species due to traits conferring higher susceptibility to extinction may also result in the loss of functionally-important species across a habitat edge gradient. Likewise, response and effect traits may be important in determining reassembly of communities in regenerating habitats, which may provide insight into potential scenarios of functional responses to restoration efforts. To test for potential off-site effects of adjacent matrix habitat restoration on dung beetle communities, I compared dung beetle community structure and species trait composition across Afromontane forest edges adjacent to degraded and regenerating matrix habitat at Ngel Nyaki forest reserve in Nigeria. I also measured dung removal rates across habitat edge gradients to investigate the relative off-site impacts of matrix restoration on dung beetle-mediated ecosystem processes. I found significant effects of adjacent matrix condition on edge response functions in dung beetle abundance, species distributions, and trait composition. Beetle abundances were markedly higher in forests adjacent to regenerating matrix, whereas the largest differences in trait composition were found between degraded and regenerating matrix habitat, indicating the presence of ecological filtering processes in these areas. Furthermore, I found that species traits determined community structural responses to environmental change and this had strong flow-on effects to rates of dung removal. Shifts in trait distributions explained dung removal rates above and beyond total beetle mass, suggesting that neutral processes alone could not explain functional efficiency. In particular, habitat regeneration resulted in the assembly of communities with high total beetle mass and on-average smaller beetles, which was optimal for functional efficiency. In conclusion, the restoration of adjacent matrix habitat was shown to effectively mitigate edge effects on dung beetle community structure resulting in the re-establishment of important associated ecosystem processes.

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39

Hughes, Brian. "Characterizing the Immobile Region of the Hyporheic Zone through the use of Hydrologic and Geophysical Techniques at Crabby Creek, PA, USA." Master's thesis, Temple University Libraries, 2011. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/142867.

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Geology
M.S.
At Crabby Creek, an urbanized watershed in northeast Chester County, Pennsylvania, an NaCl tracer test was conducted in 2010 to assess changes in hyporheic flow from a 2009 tracer test around the same stream restoration J-Hook. This project compares the 2009 and 2010 tracer test breakthrough curves and geophysical time-lapse resistivity surveys. This project also compares elevation cross sections and tile probing from 2009 and 2010, both measured upstream and downstream from the J-Hook. To confirm areas of lingering tracer seen in the time-lapse resistivity profiles, sediment cores using the freeze core method were taken to measure pore water for tracer. This project also measured diurnal temperature flux through the streambed at several locations along the sample site to model vertical water and heat flux. The breakthrough graphs constructed from the conductivity of the well water samples shows similar hyporheic flow characteristics from 2009 to 2010. The time-lapse resistivity profiles show an area of lingering tracer upstream from the J-Hook in 2010 that is similar in shape and location to an area upstream from the J-Hook in the 2009 profiles. However, an area of lingering tracer downstream from the J-Hook present in 2009 as a round feature on the profile is now a thin linear feature. The freeze cores show tracer present in the pore water after the end of the tracer injection in the stream sediment, confirming areas of lingering tracer seen in the time-lapse resistivity profiles. The grain size analysis of the freeze cores and the comparison to the 2009 cores taken at Crabby Creek show similar grain size distribution upstream from the J-Hook. Downstream from the J-Hook the grain size analysis shows a redistribution of sediment. Upstream from the J-Hook the tile probe shows both shallower and deeper bedrock, a redistribution of sediment but no net erosion. Downstream from the restoration structure, however, the tile probe data show a sediment loss of 20 cm. Elevation cross section surveys from 2009 and 2010 confirm what the tile probing found, a loss of sediment downstream but not upstream from the J-Hook. Temperature modeling of heat flux through the sediment shows that the diurnal temperature distribution can be accounted for without vertical flux. Thus, the immobile regions upstream and downstream from the J-Hook seem to be related to sediment distribution rather than hydrologic gradient differences. The significance of this study shows the need to use multiple techniques to characterize the immobile zone as a part of hyporheic flow. The immobile zone is an important area of chemical reactions in the streambed. At Crabby Creek the central J-Hook inhibits net erosion patterns upstream from the structure, allowing for the continued presence of an immobile zone. Downstream from the central J-Hook the erosion of the streambed sediment led to a decrease in size and location of the immobile zone. The disturbance of sediment around restoration structures influences the development of a healthy hyporheic flow and needs to be studied for future restoration of impaired streams and riparian corridors.
Temple University--Theses

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Becerra, Terrie A. "Muddying the waters: the failure of water restoration bureaucracies in Kansas." Diss., Kansas State University, 2010. http://hdl.handle.net/2097/4848.

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Doctor of Philosophy
Department of Sociology, Anthropology, and Social Work
Gerad D. Middendorf
In the almost 40 years since the passage of the Clean Water Act and 25 years of regulating nonpoint source pollution, and despite countless state and local community projects focused on water quality issues, clean water goals have not been met. To comprehend this failure and understand how water resources are governed and how water quality goals are pursued, I explore how watershed-level governance structures emerged and function in their specific local environment, within the state hierarchy of water governance, and as implementation of state and national policy. To this end, the structure, process, and outcomes of two newly organized and local watershed-level governance structures in Kansas were examined. An actor-oriented political ecology approach informed by environmental governance and watershed management literature was used to guide the study. Attaining water quality goals necessitates recognizing the connections between the political economy of agriculture, the cultural factors acting upon agricultural producers, and the natural, biophysical environment. Thusly, a comparative case study strategy was employed for the overall research design. Documents and interview transcripts were analyzed employing a grounded theory approach for differences and similarities; they were also sorted into topical categories and coded for common themes. The research questions focused on the agency and capacity of local watershed structures to determine the relations regarding water resource use in their watershed. Central questions addressed structure responsiveness to local versus state or national concerns; the underlying interests reflected by community member participation; and the effectiveness of local water-governance in protecting water resources. Governance models that began with holistic, alternative, participatory strategies are evolving into targeted, problem-solution strategies, and what began as watershed management is becoming problem shed management.

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Anthony, David. "Movers and shakers : the affects of vibrations on historic structures." Virtual Press, 1997. http://liblink.bsu.edu/uhtbin/catkey/1041912.

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Preservationists and historic sites managers need to be aware of the affects of excess man-made vibrations on historic structures. The purpose of this creative project is to examine those affects and identify some methods to mitigate them. To write this project, it was necessary to search through available literature identifying past research and studies on this subject. Research was culled from various sources examining the affects of vibrations on new and historic structures and are presented here in one volume.The affects of vibrations on historic structures is not a subject that is well represented in preservation or structural engineering literature. The information currently available is scattered through various sources. Thus, there is the lack of a single reference examining the affects of vibrations on historic structures. This project is meant to be used as a reference for historic preservationists, house museum curators, and historic sites managers who seek information about vibration effects and possible solutions to their vibration problem.
Department of Architecture

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Ayala, Karen M. "Hacienda La Monserrate : a historic structure report and rehabilitation recommendations." Virtual Press, 1994. http://liblink.bsu.edu/uhtbin/catkey/902473.

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For almost 450 years the island of Puerto Rico has had an agricultural economy based on the cultivation and production of sugar. Sugar plantations became small communities within towns with distinctive structures and buildings. When large scale commercial sugar production ceased, plantation houses were abandoned and have deteriorated to the point of collapse. A small number of plantation houses are still standing in defiance of progress and their own deterioration.Plantation houses represent part of Puerto Rico's economic and social history and deserve to be preserved. As a result of their architectural significance and uncertain future, plantation houses throughout the Island, should be documented.The focus of this Creative Project is the documentation of the main house in La Monserrate sugar plantation and present recommendations for its rehabilitation and adaptive reuse. This plantation house is located in Manati, a town along the north coast of Puerto Rico. The document will cover a variety of subjects all related with the history of the development of the sugar industry and its influence in Puerto Rico's architecture. The document includes both, a comprehensive analysis of the house and preliminary recommendations for its future adaptive reuse.It is the author's hope that this document will increase public awareness about the importance of preserving this particular building as well as some of the cultural and economic advantages of historic preservation. The community needs to understand and appreciate their built heritage and restoring and rehabilitating the main house in Hacienda La Monserrate can be the first step to achieve it.
Department of Architecture

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Gregory, Andrew Stuart. "The effects of amendments on soil structural development in a clay soil-forming material used as a landfill restoration cap." Thesis, Cranfield University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274050.

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Biemiller, Richard Andrew. "Influence of Structural Disturbance on Stream Function and Macroinvertebrate Communities in Upper Coastal Plain Headwater Streams." UKnowledge, 2016. http://uknowledge.uky.edu/entomology_etds/25.

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Freshwater is a resource under threat due to anthropogenic actions. Stream restoration is a common method for mitigating disturbance. Inconsistent methodologies used for evaluating restorations have drawn criticism. Limited use of baseline data for guiding stream restoration activities is of particular concern. This study was developed to elucidate metrics that differentiate reference and disturbed sites in Upper Coastal Plain streams. This information could improve resource use and successes of restorations. Structural and functional variables were examined in 10 reference and 10 streams that meet the traditional definition of disturbance and would be restoration priorities. Disturbed streams were classified into two regimes, temporal, based on time since disturbance, and categorical, based on disturbance cause. Some metrics of geomorphology, water chemistry and macroinvertebrates differentiated reference from disturbed regimes and while other metrics separated streams within disturbance regimes. Surprisingly, leaf decay rate was not an effective metric for determining disturbance. However, macroinvertebrate leaf pack colonizers were found to be useful for differentiating reference sites and disturbance regimes. Of the 10 disturbed streams this study examined, my data suggests that only three are in immediate need of restoration. This study emphasizes the importance of baseline data and its potential benefits for guiding stream restoration.

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Zolkewitz, Michael Alan Bien Walter F. "The use of assisted succession to restore the globally imperiled dwarf pine-oak forests of the New Jersey Pinelands : an investigation of the functional and structural recovery of an abandoned gravel pit /." Philadelphia, Pa. : Drexel University, 2010. http://hdl.handle.net/1860/3290.

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Gatis, Naomi Le Feuvre. "Determining the effects of peatland restoration on carbon dioxide exchange and potential for climate change mitigation." Thesis, University of Exeter, 2015. http://hdl.handle.net/10871/18205.

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Over the last millennium peatlands have accumulated significant carbon stores. Drainage for agricultural use has been widespread and has altered the functioning of these mires: shifting them towards carbon release. Recently, in recognition of the range of ecosystem services derived from these landscapes peatland restoration projects have been initiated. Carbon storage is often cited amongst the aims of these projects, especially since the inclusion of rewetting wetlands in the Kyoto Protocol. However, little is known about the effects of ditch blocking on CO2 fluxes, particularly in Molinia caerulea dominated peatlands, a species common on degraded peatlands which tolerates a range of water table depths. This thesis aims firstly to quantify CO2 fluxes from a drained Molinia caerulea dominated blanket bog and to improve understanding of the temporal and spatial controls on these fluxes and secondly, to quantify the immediate effects of ditch blocking. Closed chamber measurements of net ecosystem exchange and partitioned below-ground respiration from control-restored paired sites were collected over the growing seasons immediately pre- (2012) and post-restoration (2013/2014). These flux data were coupled with remotely sensed data quantifying vegetation phenology and structure with a fine resolution (daily/cm) over large extents (annual/catchment). Although temporal variation in water table depth was not related to CO2 fluxes, the seasonal average related to vegetation composition suggesting raising water tables may promote a change in vegetation composition within these species-poor ecosystems. The distribution of water table depths, vegetation composition and CO2 fluxes did not vary with proximity to drainage ditches despite their prominence. An empirical model suggests in a drained state these peatlands are CO2 sources, indicating carbon previously accumulated is gradually being lost. Data suggest restoration does not always significantly affect water tables and consequently CO2 fluxes in the short-term. Where shallower water tables were maintained during dry conditions photosynthesis decreased and heterotrophic respiration increased: enhancing carbon release. Research undertaken during atypical weather has been unable to determine if restoration will be able to raise water tables sufficiently to protect the existing peat store and promote the vegetation change required to reinstate CO2 sequestration in the longer-term.

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Scholl, Eric. "The influence of water velocity on aquatic macroinvertebrate functional structure and production in the Cache River in Southern Illinois." OpenSIUC, 2013. https://opensiuc.lib.siu.edu/theses/1158.

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The Cache River, located in southern Illinois, faces a unique set of restoration challenges due to multiple anthropogenic modifications to the watershed. In 1915 the Cache River was disconnected and divided into two sub-watersheds, the upper Cache River (UCR) and the lower Cache River (LCR). This alteration has led to impairments in both sections of the Cache River. The UCR currently suffers from channel incision and wetland loss due to an increase in channel slope, while the LCR experiences decreased flows and related habitat degradation. Currently, watershed managers are proposing to restore a more natural flow regime to the LCR through some degree of hydrologic reconnection. I quantified the effects of small-scale differences in flow velocities on snag-dwelling aquatic macroinvertebrates in the UCR and LCR. My study was designed to provide critical information on potential ecological responses to proposed reconnection of the Cache River by examining the effects of flow on elements of ecosystem structure (macroinvertebrate community structure, diversity, richness, evenness, biomass, and abundance) and function (secondary production). Total snag-dwelling macroinvertebrate abundance was higher in the LCR (p < 0.001), and both total biomass and total production did not differ between the UCR and LCR. Passive filter-feeders (families Hydropsychidae and Simuliidae), EPT taxa (orders Ephmeroptera Plecoptera and Trichoptera), and Elmidae were more abundant and had higher biomass on snags in the UCR compared to the LCR. Due to high variability in estimates, only Elmidae production was higher in the UCR (p < 0.05), with non-significant trends of higher production of passive filter-feeders and EPT taxa in the UCR. Non metric multidimensional scaling (NMDS) ordinations showed different communities on snags in the UCR and LCR, and analysis of similarity indicated these differences were significant (ANOSIM Global R = 0.98, p < 0.05). This UCR community was more diverse (p < 0.05) and composed of larger-sized individuals than the LCR (p < 0.001). In contrast, the LCR community was composed mainly of taxa that are associated with very low flows (e.g., zooplankton), tolerant of degraded conditions (e.g., Isopoda and Chironomidae), and generally smaller in body size. Although not statistically significant, there was a trend for higher total production in the LCR (28.90 ± 54.51) (mean ± 95% CI) than the UCR (10.22 ± 6.43). This trend was driven primarily by a patchily distributed Chironomidae, which were highly productive on some LCR snags. However, given the degraded water quality in the LCR, the ultimate fate of this production is not clear. The more natural flow regime in the UCR is likely driving many of the differences between the UCR and LCR that I observed, but relationships may be complex, as flow influences biota in numerous direct and indirect ways. This study is the first I know of to examine the structure and function of macroinvertebrate communities prior to hydrologic restoration of a river. Results will assist resource managers in the justification, planning, and execution of hydrologic restoration in the Cache watershed. Given that many river restoration projects are not based on sound ecological information and principles, this project can also serve as a model for future river restoration efforts.

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Schleif, Carolyn. "Oldfields : an historic structures report." Virtual Press, 1989. http://liblink.bsu.edu/uhtbin/catkey/563163.

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The purpose of this master's thesis was to prepare anhistoric structures report on Oldfields, the former estate of Mr. Hugh McKennan Landon,and Mr. Josiah Kirby Lilly, Jr. It included some of the surrounding areas known as the Town of Woodstock and an area of land in the flood plains below the estate. Construction of the estate began in 1908 and was completed three years later. Of particular note was the historic landscape which was designed between 1920 and 1926 by Percival Gallagher of Olmsted Brothers, a firm in Brookline, Massachusetts. The estate has undergone limited change and has never been fully documented. Both the landscape and the home are eligible for inclusion on the National Register for their historic and architectural significance. To qualify for the Register, the site or building must be designed by a master, be an example of a unique method of construction, be associated with historically significant people, or be an excellent example of a type of design. Although only one of the above qualifications is necessary for National Register nomination, this estate met all four qualifications. Clearly, scholarly historical documentation of the site and building was in order. The timely need for such work was great, since few of the original family members were still alive, and rumors pertaining to the home and family were were being taken as fact.
Department of Architecture

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Azinheira, David Lee. "Complementary Effects of In-Stream Structures and Inset Floodplains on Solute Retention." Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/51046.

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The pollution of streams and rivers is a growing concern, and environmental guidance increasingly suggests stream restoration to improve water quality. ï¿½Solute retention in off channel storage zones such as hyporheic zones and floodplains is typically necessary for significant reaction to occur. ï¿½Yet the effects of two common restoration techniques, in stream structures and inset floodplains, on solute retention have not been rigorously compared. ï¿½We used MIKE SHE to model hydraulics and solute transport in the channel, inset floodplain, and hyporheic zone of a 2nd order stream. ï¿½We varied hydraulic conditions (winter baseflow, summer baseflow, and storm flow), geology (hydraulic conductivity), and stream restoration design parameters (inset floodplain length, and presence of in stream structures). ï¿½In stream structures induced hyporheic exchange during summer baseflow with a low groundwater table (~20% of the year), while floodplains only retained solutes during storm flow conditions (~1% of the year). ï¿½Flow through the hyporheic zone increased linearly with hydraulic conductivity, while residence times decreased linearly. ï¿½Flow through inset floodplains and residence times in both the channel and floodplains increased non linearly with the fraction of bank with floodplains installed. ï¿½The fraction of stream flow that entered inset floodplains was one to three orders of magnitude higher than that through the hyporheic zone, while the residence time and mass storage in the hyporheic zone was one to five orders of magnitude larger than that in floodplain segments. ï¿½Our model results suggest that in stream structures and inset floodplains are complementary practices.
Master of Science

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Mejía-Herrera, Pablo-Eliécer. "Apport de la modélisation 3D et de la restauration structurale dans la compréhension des gisements de matières premières minérales." Thesis, Université de Lorraine, 2014. http://www.theses.fr/2014LORR0308/document.

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L'objectif de cette thèse est d'expliquer les avantages qu'offrent la reconstruction de l'architecture des unités géologiques, leurs déformations ainsi que leurs variations au cours du temps à l'exploration de ressources minérales, tout en appliquant des méthodes et outils de modélisation 3D et 4D. La modélisation et la restauration structurale sont utilisées ici pour estimer des attributs géologiques qui peuvent aider à la compréhension de la formation des gisements, et à l'identification des zones favorables aux minéralisations. Cette thèse est axée sur l'application de la modélisation 3D et 4D à des cas réels pour trouver le lien entre une minéralisation et des processus géologiques tel que l'exhumation des terrains, l'activité des failles et la fracturation résultant d'un évènement de déformation. Ce mémoire est organisé en trois parties : (i) la modélisation structurale ainsi que la restauration surfacique ont été appliquées au district minier de la Ceinture de Cuivre de Legnica-Glogów (sud-ouest de la Pologne), pour estimer les conditions favorables à la fracturation hydraulique. Cette fracturation est intervenue dans le nord de l'Europe lors d'une phase d'inversion à la fin du Crétacé et au début du Paléocène. Dans notre hypothèse de départ, la fracturation hydraulique développée au cours de cette période a joué un rôle important dans la distribution en cuivre observée aujourd'hui dans le district minier ; (ii) la courbure des surfaces triangulées, représentant les horizons de la région des Sudètes polonaises, permet de mettre en évidence les systèmes de failles dans le socle. En particulier, des méthodes de restauration surfaciques ont été utilisées pour évaluer l'activité de des failles au cours du temps, en se basant sur la courbure des surfaces obtenues à chaque étape de la restauration. Les zones de fortes activités sont ici associées aux processus de minéralisation cuprifère de la région ; (iii) la restauration mécanique de la région de Mount Pleasant (Australie occidentale), a permis de simuler un évènement de raccourcissement apparu dans l'Archéen et qui est lié à un processus de minéralisation aurifère. La restauration mécanique est appliquée pour estimer le champ des déformations de la région au moment du raccourcissement. Avec ce champ de déformation, il est possible de calculer les paramètres d'endommagement de la masse rocheuse qui semblent liés aux zones aurifères situées hors des systèmes principaux de failles. Cette thèse a ainsi permis de mettre en évidence l'aspect prometteur de la modélisation et de la restauration structurale pour identifier des zones potentiellement minéralisées, mettant en valeur leur utilisation pour l'exploration des gisements et des ressources minérales
The objective of this Ph.D. thesis is to apply 3D and 4D modeling methods to reconstruct the architecture and deformations over time of geological entities in a defined region. Structural restoration modeling is used here to estimate geological, physical and structural attributes for understanding the origin of ore-deposits, and for identifying potential mineralized areas. We focused this thesis on 3D and 4D modeling on real case studies with different geological contexts (e.g. uplifting, fault activity and shortening), demonstrating the advantages and drawbacks on their use for similar situations. This thesis is organized into three parts: (i) the application of structural modeling in the mining district of the Copper Belt of Legnica-Glogów (south-west Poland). A surface-restoration approach was applied to estimate favorable conditions for hydraulic fracturing during an inversion, occurred in the northern part of Europe at Late Cretaceous--Early Paleocene. In our hypothesis, hydraulic fracturing developed at that time played an important role in the distribution of copper content observed in present days in the mining district. (ii) The curvature calculated on triangulated surfaces that represent the stratigraphic horizons in the Fore-Sudetic region (Poland), are used to highlight the fault systems in the basement as well as their activity. High curvature values reveal the fault activity which is associated with the copper mineralization process in the region. (iii) Mechanical restoration of the Mount Pleasant, Western Australia, simulates an Archean shortening event which occurred in the area linked to the gold mineralization process. The mechanical restoration was used to estimate the strain field in the region at the time of shortening. This deformation field was used to estimate the damage parameters of the rock mass. They show new potential gold areas located in off-fault gold systems. In conclusion, it is shown that 3D modeling and structural restoration could be used to identify potential favorable zones for the presence of mineralization, and seem promising as a tool for the exploration of ore-deposits and mineral resources

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Dissertations / Theses on the topic 'Structural restorations'

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