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Littérature scientifique sur le sujet « Fores regeneration. eng »

Auteur : Grafiati

Publié le 4 juin 2021

Mis à jour le 4 février 2022

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Articles de revues sur le sujet "Fores regeneration. eng"

Bednařík, J., V. Čada, and K. Matějka. "Forest succession after a major anthropogenic disturbance: a case study of the Jewish Forest in the Bohemian Forest, Czech Republic." Journal of Forest Science 60, No. 8 (2014): 336–48. http://dx.doi.org/10.17221/57/2014-jfs.

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The knowledge of forest development after disturbances, particularly anthropogenic disturbances, is of major importance for forest management. Many areas of mountain forests in Europe have been affected by human activities such as felling and livestock grazing in the past and then left for natural succession. Those forests provide several ecosystem services (e.g. soil or avalanche protection) and therefore it is vital to know their developmental processes. The Norway spruce forest stand in the area of Medvěd&iacute; Mt. (&Scaron;umava National Park, Czech Republic), known as the Jewish

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GITHIRU, MWANGI, LEON BENNUN, and LUC LENS. "Regeneration patterns among bird-dispersed plants in a fragmented Afrotropical forest, south-east Kenya." Journal of Tropical Ecology 18, no. 1 (2002): 143–49. http://dx.doi.org/10.1017/s0266467402002092.

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Fruit-eating birds play an important role in the seed dispersal of many tropical plants (e.g. Herrera 1984), and the foraging behaviour of avian frugivores may affect their seed-dispersal capabilities (Loiselle & Blake 1999,Schupp 1993, Traveset 1994). For instance,shorter visits tend to produce less clumped seed distributions (Graham et al. 1995). Also,avian frugivores often feed on the fruits of several plant species over short periods of time (Herrera 1984, 1988a; Levey et al. 1994) in some non-random pattern (Herrera 1998). This potentially produces a predictable spatial pattern of the

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Govedar, Zoran, and Zoran Stanivukovic. "Natural regeneration of beech in mixed stands of beech and fir with spruce (Piceo-Abieti-Fagetum) in the virgin forest "Perucica"." Bulletin of the Faculty of Forestry, no. 97 (2008): 107–26. http://dx.doi.org/10.2298/gsf0897107g.

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Natural regeneration of beech in mixed stands of beech and fir was researched in the virgin forest Perucica, e.g. the basic elements of stand structure with special reference to beech regeneration characteristics, and the regeneration process in the conditions of broken stand canopy. The analysis included the stand development stages in he virgin forest based on the elements of structure, as well as the silvigenetic phases on a transect 10?100 m. The characteristics of beech regeneration (abundance, height, crown size, length of apical and lateral shoots) were measured on the selected regenera

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Ward, Jeffrey S., Scott C. Williams, and Megan A. Linske. "Influence of invasive shrubs and deer browsing on regeneration in temperate deciduous forests." Canadian Journal of Forest Research 48, no. 1 (2018): 58–67. http://dx.doi.org/10.1139/cjfr-2017-0208.

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While both chronic white-tailed deer (Odocoileus virginianus Zimmermann) overbrowsing and invasive shrubs have been linked to native regeneration failure in temperate hardwood forests, little is known of their relative importance and possible synergistic effects. Therefore, we established three study areas in Connecticut to examine the interaction of three levels of invasive shrub control and absence or presence of deer herbivory on forest regeneration over 9 years. Five observations suggest that obtaining forest regeneration requires a comprehensive management strategy. First, competitive int

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Frei, Maurus. "Zu wenig Waldverjüngung? Mit mehr Waldbewirtschaftung und Jagd zum Erfolg (Essay)." Schweizerische Zeitschrift fur Forstwesen 168, no. 4 (2017): 200–204. http://dx.doi.org/10.3188/szf.2017.0200.

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Not enough forest regeneration? Intensified silviculture and hunting bring success (essay) The influence of red deer, roe deer and chamois on forest regeneration is significant in Swiss forests, especially in mountain forests. Oak, silver fir and sycamore rarely regenerate without protection measures. Red deer populations have practically doubled over the last 20 years, and roe deer are found in every forest. Nevertheless, it is possible to have, even in Switzerland, a dense, site-appropriate forest regeneration. The conditions for this are close-to-nature silviculture over large areas, and hu

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HOMER, FLOYD, KISHORE LAL, and WINSTON JOHNSON. "Forest species regeneration and management options in the Melajo Nature Reserve, Trinidad and Tobago." Environmental Conservation 25, no. 1 (1998): 53–64. http://dx.doi.org/10.1017/s0376892998000095.

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Tropical moist forests are declining rapidly world-wide. Reforestation efforts in Trinidad have generally been insufficient and focused on non-native species. Some of these species (e.g. Pinus caribaea), however, appear ecologically inappropriate but have been used extensively on sandy soils after fires or where harvesting has degraded the original vegetation. Little research attention has been given to natural regeneration as a potential for future timber production. The purpose of this study was to determine whether or not post-fire regeneration provided sufficient species of commercial impo

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Pitt, Douglas, Andrée Morneault, William Parker, Len Lanteigne, Michael Hoepting, and Al Stinson. "Influence of herbaceous and woody competition on white pine regeneration in a uniform shelterwood." Forestry Chronicle 87, no. 05 (2011): 653–68. http://dx.doi.org/10.5558/tfc2011-072.

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We investigated the effects of herbaceous and woody vegetation control on the survival and growth of planted and natural eastern white pine (Pinus strobus L.) seedlings through six growing seasons following a uniform shelterwood regeneration harvest on two independent sites. Subsequent to chain scarification, white pine seedlings were planted at 2-m spacing, augmenting natural regeneration (full stocking and >3000 seedlings per ha). Herbaceous vegetation control involved the suppression of grasses, forbs, ferns, and low shrubs, and was maintained for zero, two, or four growing seasons after

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Maza-Villalobos, Susana, Celina Lemus-Herrera, and Miguel Martínez-Ramos. "Successional trends in soil seed banks of abandoned pastures of a Neotropical dry region." Journal of Tropical Ecology 27, no. 1 (2010): 35–49. http://dx.doi.org/10.1017/s0266467410000611.

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Abstract:A chronosequence was used to study seed-bank communities during the first 12 y of tropical-dry-forest regeneration in abandoned pastures in Chamela, Mexico. Prediction that seeds of woody species replace those of herbaceous species during succession was tested and mechanisms of species replacement (facilitation, tolerance, inhibition) were assessed. Four successional categories (three sites each) were considered: pasture (0–1 y since abandonment), early (3–5 y), intermediate (10–12 y), and old-growth forest. At the end of the dry season, 20 cylindrical soil samples (10 cm diameter, 15

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Rađević, Vid, Predrag Pap, and Verica Vasić. "Management of the common oak forests in Ravni Srem: Yesterday, today, tomorrow." Topola, no. 206 (2020): 41–52. http://dx.doi.org/10.5937/topola2006041r.

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The paper shows a historical overview of the common oak forest management in Ravni Srem from the end of the 19th century to the present. Particular attention is paid on various ways of regeneration, tending and protection measures of these forests in the past and present and proposed the directions for the common oak forests regeneration in the future.

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Guedes, Isabel Carolina de Lima, Luiz Moreira Coelho Júnior, Antônio Donizette de Oliveira, José Márcio de Mello, José Luiz Pereira de Rezende, and Charles Plínio de Castro Silva. "Economic analysis of replacement regeneration and coppice regeneration in eucalyptus stands under risk conditions." CERNE 17, no. 3 (2011): 393–401. http://dx.doi.org/10.1590/s0104-77602011000300014.

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Projects are by their very nature subject to conditions of uncertainty that obstruct the decision-making process. Uncertainties involving forestry projects are even greater, as they are combined with time of return on capital invested, being medium to long term. For successful forest planning, it is necessary to quantify uncertainties by converting them into risks. The decision on whether to adopt replacement regeneration or coppice regeneration in a forest stand is influenced by several factors, which include land availability for new forest crops, changes in project end use, oscillations in

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Thèses sur le sujet "Fores regeneration. eng"

Bianconi, Gledson Vigiano. "Morcegos frugívoros no uso do hábitat fragmentado e seu potencial para recuperação de áreas degradadas : subsídios para uma nova ferramenta voltada à conservação /." Rio Claro : [s.n.], 2009. http://hdl.handle.net/11449/106553.

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Resumo: Filostomídeos frugívoros são considerados elementos-chave na conservação e restauração florestal dado à sua representatividade numérica (espécies e indivíduos), alto potencial de deslocamento e eficiência na dispersão de sementes. Técnicas que potencializem esse papel ecológico podem ter grande aplicação na recuperação de hábitats degradados, comuns à Mata Atlântica brasileira. Estudos com óleos essenciais isolados de frutos quiropterocóricos maduros sugeriram que eles podem ser utilizados para atrair e capturar morcegos frugívoros no interior de áreas florestais. Assim, a presente tes

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Rother, Débora Cristina. "Chuva de sementes e estabelecimento de plântulas em ambientes com bambus na Mata Atlântica /." Rio Claro : [s.n.], 2006. http://hdl.handle.net/11449/87870.

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Resumo: Este trabalho teve como objetivos verificar como variam a chuva de sementes e o estabelecimento de plântulas entre ambientes colonizados (B) e não colonizados (SB) pelo bambu Guadua tagoara na floresta Atlântica do Parque Estadual Carlos Botelho, Sete Barras - SP. Foram utilizados 40 coletores e 40 parcelas de 1m2 em cada ambiente com monitoramento mensal no período de um ano. SB apresentou 38,71% mais sementes que B, maior riqueza, menor diversidade e equidade. Os ambientes mostraram uma alta similaridade no número de espécies de sementes em comum e com abundâncias semelhantes. SB apr

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Martins, Leonardo Augusto 1984. "Estrutura e dinâmica sucessional de um fragmento de floresta estacional semidecidual com diferentes históricos de pertubação /." Botucatu : [s.n.], 2010. http://hdl.handle.net/11449/88513.

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Orientador: Vera Lex Engel<br>Banca: Sebastião Venâncio Martins<br>Banca: Renata Cristina Batista Fonseca<br>Resumo: A Mata Atlântica é um dos biomas de maior biodiversidade do planeta, que há séculos tem sido sistematicamente destruída pelo desmatamento e fragmentação florestal, principalmente no domínio da Floresta Estacional Semidecidual. Os fragmentos remanescentes frequentemente têm sofrido distúrbios adicionais, tanto antrópicos quanto naturais. Deste modo, para a sua conservação e restauração é fundamental o conhecimento da resposta desses ecossistemas aos distúrbios. Este trabalho teve

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Derroire, Geraldine. "Secondary succession in tropical dry forests : drivers and mechanisms of forest regeneration." Thesis, Bangor University, 2016. https://research.bangor.ac.uk/portal/en/theses/secondary-succession-in-tropical-dry-forests(e1b446d2-1c35-4810-8897-53e88336bf5b).html.

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Secondary succession is a complex process involving numerous factors acting across scales. Understanding secondary succession in tropical dry forests is important for the conservation and restoration of this highly threatened biome. My research aims to improve knowledge of the trajectories and drivers of secondary succession in this biome, and the underlying mechanisms. I used a combination of literature synthesis, observational and experimental approaches to study plant-plant interactions and community changes during succession. Through review of published studies, I showed that established t

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Chapitres de livres sur le sujet "Fores regeneration. eng"

Lupton, Ruth, and Richard Crisp. "Regeneration redux? What (if anything) can we learn from New Labour?" In Social Policy Review 30, edited by Catherine Needham, Elke Heins, and James Rees. Policy Press, 2018. http://dx.doi.org/10.1332/policypress/9781447349990.003.0010.

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The European Union referendum result in England focused increasing political attention on ‘left behind’ places sidelined in the ‘post-regeneration’ (Matthews and O'Brien, 2015) era of 2010 onwards. This shift creates space for thinking anew about reviving and reconfiguring regeneration policies to address enduring forms of place-based disadvantage. To this end, this chapter takes a close look at the ‘New’ Labour approach to urban regeneration from 1997 to 2010 and what can be learned from it. It offers a new conceptual analysis of how the New Labour years were characterised by a tension between ‘ameliorative’ and ‘transformative’ policy logics, with valuable ameliorative outcomes around improving neighbourhood conditions eventually reassessed as failure through the lens of transformative objectives around wholesale economic regeneration. The chapter concludes that these tensions and contestations need to be acknowledged and resolved in less binary and divisive ways than in recent policy history within any new round of regeneration policy.

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Nadkarni, Nalini M., and Robert O. Lawton. "Ecosystem Ecology and Forest Dynamics." In Monteverde. Oxford University Press, 2000. http://dx.doi.org/10.1093/oso/9780195095609.003.0015.

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The earth’s surface supports living organisms and their environments to form the biosphere, a thin film of life around the planet. Organisms participate in interacting systems or communities, and these communities are coupled to their environments by the transfer of matter and energy and by movements of air, water, and organisms. Human activities in Monteverde and elsewhere can drastically alter forest ecosystems. Textbooks on ecosystem ecology typically include such topics as community structure and composition (including plant growth forms, vertical structure, niche space, species diversity), communities and environments (species distributions along environmental gradients, community classification, succession), production (food chains and webs, decomposition and detritus, photosynthesis), and nutrient cycling (mineral nutrition of organisms, soil development, biogeochemistry). Our understanding of tropical ecosystem ecology generally falls short of what we know of other aspects of tropical biology. There are far more studies concerning population biology, autecology, and life history of tropical organisms than nutrient cycling, productivity, and landscape ecology. This pattern is true in Monteverde and in such well-studied tropical forests as La Selva, Barro Colorado Island (BCI), and the Luquillo National Forest (Lugo and Lowe 1995, McDade et al. 1994). Logistical blocks to ecosystem research exist because collaborating teams of scientists are typically needed to tackle the multiple disciplines that ecosystem-level questions require, which demands a large infrastructure and budget. Temporal problems exist because ecosystem-level phenomena (e.g., tree mortality and forest regeneration) may involve time scales longer than the life of a single granting period or lifetime of a researcher. A strong academic base for ecosystem ecology is lacking because the pool of existing studies is too small to draw patterns and extrapolate trends. These obstacles have not often been overcome in Monteverde. No Monteverde institution has provided the infrastructure to support ecosystem research (e.g., laboratory facilities, meteorological station, technical library). Some community members have negative feelings about experimental manipulations and destructive sampling sometimes needed to answer ecosystem ecology questions. From the 1970s to the 1990s, Organization for Tropical Studies (OTS) courses were in Monteverde and in such well-studied tropical forests as La Selva, Barro Colorado Island (BCI), and the Luquillo National Forest (Lugo and Lowe 1995, McDade et al. 1994).

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Kumar, Manoj. "Modeling and Simulation of Surface Texture for End-Milling Process." In Handbook of Research on Manufacturing Process Modeling and Optimization Strategies. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-2440-3.ch002.

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Analysis and simulation of manufacturing process require extensive and complicated computations. Nowadays, computer resources and computational algorithms reach to the state that can model and simulate the problem efficiently. One of the important processes in manufacturing is machining. In this research end-milling process which is one of the complex and wide-spread processes in machining is chosen. Most important parameters in end-milling are surface roughness and surface location errors. A comprehensive simulation software is developed to model end-milling process in order to anticipate finishing parameter such as surface roughness and errors. The proposed algorithm takes into account cutting conditions, such as feed, doc, woc, tool run out, etc. In addition, dynamic simulation module of the software can accurately model flexible end-mill tool, the milling cutting forces and regeneration of waviness effects. The software can accurately determine the most commonly used index of surface roughness parameters such as Ra, P.T.V. and surface errors.

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Dalton, David R. "Harvesting the Light." In The Chemistry of Wine. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780190687199.003.0018.

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Products of reactions are separated from reactants by a barrier or barriers. if this were not so we could not have any reactants—everything would already be products! In order for the grapevine to grow beyond the materials provided in the seed, the rootstock, or the cutting, it is necessary for the reactants obtained from the environment (i.e., nutrients in the soil and air) to be converted to plant material. The energy for this conversion comes from the sun, and it is the chloroplasts that take the light and, using the aforementioned materials, convert it to useful energy in the plant. So, overall, for processes to occur within the plant, a high energy species must be formed and then used. Subsequent regeneration of the high energy species can use more sunlight. The currency of energy is adenosine triphosphate (ATP). When it is used, it is converted to adenosine diphosphate (ADP) and inorganic phosphate (Pi), and in that conversion (or those conversions as more than one can be used to accomplish the same end) the barrier between reactant and product can be overcome (Figure 10.1). Additionally, for moving electrons and protons around where simple solvation (the use of—and interactions with—solvents) will not work, a cofactor (a “factor” that needs to be present in addition to an enzyme to enable the catalyzed reaction to occur) is often needed. These movements of electrons and protons are simply oxidations and reductions (see Appendix 1), and it is common to find oxidation and reduction being effected by using, as cofactors, either the oxidized or reduced forms of the phosphate ester of nicotinamide adenine dinucleotide (NADP+) to/ from (NADPH) and/ or the related conversion of the oxidized/ reduced forms of flavin adenine dinucleotide (FAD)/ (FADH2) (Figure 10.2). A cartoon representation of the chloroplast wall, with the stroma (the colorless fluid filling the chloroplast through which materials move) shown on the top and the lumen of the thylakoid body (where the light- dependent photochemistry occurs) on the bottom is provided in Figure 10.3. The working agents in the membrane are shown.

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Actes de conférences sur le sujet "Fores regeneration. eng"

Wang, J. J. Junz, C. M. Zheng, and C. Y. Huang. "The Effect of Harmonic Force Components on Regenerative Stability in End Milling." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-42367.

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In a systematic manner, this paper investigates the effects of harmonic force components on the regenerative stability of an end milling process. By representing the milling force pulsation in a Fourier series expansion form, the dynamic force components and the average forces due to bi-directional dynamic feed rates are both included in the generalized system dynamics formulation. In the resulting expression for the stability criterion, the spectral features of the milling forces are integrated with the dynamics of the structure, showing the significance or insignificance of the dynamic compo

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Alia, Zerrouki, Kara Karima, Redjaimia Lilia, and Rached-Kanouni Malika. "TREE SPECIES DIVERSITY AND SPATIAL DISTRIBUTION OF HOLM OAK STANDS IN CHETTABA FOREST (ALGERIA)." In GEOLINKS Conference Proceedings. Saima Consult Ltd, 2021. http://dx.doi.org/10.32008/geolinks2021/b2/v3/28.

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The forest of Chettaba is for ecotourism. Managed by the Forest Conservation of Constantine, this site is formed of several forestry species (hardwood and softwood) spread over an area of 3010 ha. The objective of this study is to estimate the viability of this site through the permanent monitoring of the current state of the forest including biodiversity and pressures. The collection of data related to it had recourse to a forest inventory and an inventory of pressures. The condition was assessed by analyzing these components. The various analyses conducted during this study revealed that the

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Shorr, Michael J., and Steven Y. Liang. "Dynamic Stability Analysis for Multi-Flute End Milling." In ASME 1995 Design Engineering Technical Conferences collocated with the ASME 1995 15th International Computers in Engineering Conference and the ASME 1995 9th Annual Engineering Database Symposium. American Society of Mechanical Engineers, 1995. http://dx.doi.org/10.1115/detc1995-0586.

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Abstract This research discusses the methodology of developing a symbolic closed form solution that describes the dynamic stability of multi-flute end milling. A solution of this nature facilitates machine tool design, machining parameter planning, process monitoring, diagnostics, and control. This study establishes a compliance feedback model that describes the dynamic behavior of regenerative chatter for multi-flute tool-work interaction. The model formulates the machining dynamics based upon the interconnecting relationship of the tool geometry convolution and the machining system complianc

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Bayly, Philip V., Keith A. Young, and Jeremiah E. Halley. "Tool Oscillation and the Formation of Lobed Holes in a Quasi-Static Model of Reaming." In ASME 1999 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/detc99/vib-8061.

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Abstract A quasi-static model of reaming is used to explain oscillation of the tool during cutting and the resulting roundness errors in reamed holes. Tools with N evenly-spaced teeth often produce holes with N+1 or N-1 “lobes”. These profiles correspond, respectively, to forward or backward whirl of the tool at N cycles/rev. Other whirl harmonics (2N cycles/rev, e.g.) are occasionally seen as well. The quasi-static model is motivated by the observations that relatively large oscillations occur at frequencies well below the natural frequency of the tool, and that in this regime the wavelength

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Horlock, J. H. "The Evaporative Gas Turbine [EGT] Cycle." In ASME 1997 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/97-gt-408.

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Humidification of the flow through a gas turbine has been proposed in a variety of forms. The STIG plant involves the generation of steam by the gas turbine exhaust in a heat recovery steam generator [HRSG], and its injection into or downstream of the combustion chamber. This increases the mass flow through the turbine and the power output from the plant, with a small increase in efficiency. In the evaporative gas turbine [or EGT] cycle, water is injected in the compressor discharge in a regenerative gas turbine cycle [a so-called CBTX plant-compressor [C], burner [B], turbine [T], heat exchan

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Bosch Reig, Ignacio, Luis Bosch Roig, Valeria Marcenac, and Nuria Salvador Luján. "Linear parks understood as vertebration instruments of the city." In 24th ISUF 2017 - City and Territory in the Globalization Age. Universitat Politècnica València, 2017. http://dx.doi.org/10.4995/isuf2017.2017.6136.

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This research raises as thesis the idea that Linear Park is an urban instrument capable of vertebrate the city and, consequently, of regenerate it. To this end, ten parks strategically located in big cities such as Rio de Janeiro, London, Paris, Madrid, Barcelona, or in medium or small cities such as Valencia, Castellón or Figueres, have been analyzed. Of this analysis we have deduced some characteristics that are considered key in the linear and transversal vertebration of the city, such as: - Green axis-corridor approach - Sequence of events with integration of public buildings - Continuit

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Gladilin, Evgeny, and Roland Eils. "Image- and Numerics-Based Analysis of Constitutive Properties of Cellular Structures." In ASME 2007 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2007. http://dx.doi.org/10.1115/sbc2007-175995.

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External forces, cell adhesion and soluble signaling molecules influence fundamental functions of cells like shape, migration, proliferation or differentiation. Thus, investigating how mechanical forces affect 3D cell structure and function is of crucial significance in order to gain a better understanding healthy and malignant cell behavior during embryogenesis, regeneration or malignancy [1]. Micromanipulation of cells in a controlled environment is a widely used approach for understanding cellular responses with respect to external mechanical forces. While experimental data provide optical

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Fresco, Anthony N. "Solute Ion Linear Alignment as the Energy Source to Address Aquifer Depletion Fresh Water Scarcity and Sea Level Rise." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-65930.

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There are reports in the literature that the lives of 4 billion people are at risk either now or in the foreseeable future, and including even 130 million US citizens, mostly in the western states of California and surroundings and in Texas and Florida as being subject to water scarcity primarily due to depletion of aquifers and ground water and losses due to evaporation. 1, 2, 3 At the same time, according to the National Oceanic and Atmospheric Administration (NOAA), there is strong evidence that global sea level is now rising at an increased rate and will continue to rise during this centur

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