Academic literature on the topic 'Founder DDM'
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Journal articles on the topic "Founder DDM"
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Jung, Gyu-Un, Tae-Hyun Jeon, Mong-Hun Kang, et al. "Volumetric, Radiographic, and Histologic Analyses of Demineralized Dentin Matrix Combined with Recombinant Human Bone Morphogenetic Protein-2 for Ridge Preservation: A Prospective Randomized Controlled Trial in Comparison with Xenograft." Applied Sciences 8, no. 8 (2018): 1288. http://dx.doi.org/10.3390/app8081288.
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The aim of this study was to evaluate the clinical, volumetric, radiographic, and histologic aspects of autogenous demineralized dentin matrix (DDM) combined with recombinant human bone morphogenetic protein-2 (rhBMP-2) used for ridge preservation, compared to those of deproteinized bovine bone with collagen (DBBC). Following atraumatic extraction, the socket was filled with DBBC, DDM, or rhBMP-2/DDM. Scanned images of dental casts and cone beam computed tomographs (CBCT) were superimposed for the calculation of soft and hard tissue volume alteration. Preoperative and postoperative measurements of the height and width of the alveolar ridge were compared using CBCT images. After 4 months, bone specimens were harvested for histomorphometric assessment. Loss of hard and soft tissue volume occurred at 4 months after extraction and ridge preservation in all groups. No volumetric differences were detected among the three groups before and 4 months after ridge preservation. The reduction in the horizontal width at 5 mm was higher in the DBBC compared to the DDM. Histologically, approximately 40% newly formed bone was founded in rhBMP-2/DDM group. The autogenous dentin matrix used to fill the socket was as beneficial for ridge preservation as conventional xenografts. The combination of rhBMP-2 with dentin matrix also demonstrated appreciable volumetric stability and higher new bone formation compared to DDM alone and DBBC.
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Giontella, Andrea, Irene Cardinali, Hovirag Lancioni, et al. "Mitochondrial DNA Survey Reveals the Lack of Accuracy in Maremmano Horse Studbook Records." Animals 10, no. 5 (2020): 839. http://dx.doi.org/10.3390/ani10050839.
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The Maremmano horse is considered one of the most important Italian warmblood breeds which originated from an ancient population. In 1980, the National Association of Maremmano Breeders established the first Studbook that recorded 440 dams and four sire founders. In this study, we selected the most significant maternal lines in terms of offspring (for a total of 74 lineages and 92 Maremmano horses) and analyzed their mitochondrial DNA control regions. We found a high variability, reflecting the importance of this local breed as a genetic resource to be preserved. Through multiple sampling, we then verified the pedigree information for 12 dam lines by matching genealogical data with mitochondrial haplotypes. A complete concordance was demonstrated in nine lineages, while for the other we highlighted a different number of haplotypes for each line (three in Fiorella, two in Nizza I, and two in Pomposina), thus suggesting that the information recorded in the Studbook could be wrong and the samples do not descend from the same maternal founder. Our combined analysis provides the opportunity to confirm the ancestry of animals and could be employed to prevent errors in pedigree data also for other breeds and species.
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Rodrigáñez, J., M. A. Toro, M. C. Rodriguez, and L. Silió. "Effect of founder allele survival and inbreeding depression on litter size in a closed line of Large White pigs." Animal Science 67, no. 3 (1998): 573–82. http://dx.doi.org/10.1017/s1357729800033014.
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AbstractAn experimental herd of Large White pigs was established in 1931 and maintained as a closed population until 1992. The complete -pedigree (410 boars and 916 sows) has been analysed to measure along the succesive cohorts of breeding animals: thefounder representation and allele survival, the evolution ofcoancestry and inbreeding and the components of inbreeding due to each founder. Inferences about genetic and phenotypic parameters and effects of dam and litter inbreeding on litter size were obtained, using Bayesian techniques, from 2612 litter records. A significant mean reduction of 0·27 piglets born and 0·39 live born for each 10% of litter inbreeding was found but also evidence of variation among founder lineages in inbreeding depression. Alleles contributing to inbreeding depression were descendent from specific founder lineages.
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SHEPHERD, ROSS K., and JOHN A. WOOLLIAMS. "Minimising inbreeding in small populations by rotational mating with frozen semen." Genetical Research 84, no. 2 (2004): 87–93. http://dx.doi.org/10.1017/s0016672304007062.
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Mating plans are investigated in order to minimize inbreeding in small populations when frozen semen is available. For a single dam line it was found that specific sire rotations minimized the asymptotic level of inbreeding when semen is used repeatedly from certain generations. When semen of N foundation (G0) sires is used rotationally over generations it is shown that the inbreeding level asymptotes to 1/(2N+1−2). However, if only G0 sires are used then all genes will eventually descend from the founder sires. Inbreeding can be reduced further by using sires from generation one (G1) and later as this retains genes from the founder dams in the long-term gene pool. If semen from NG0 sires and N unrelated G1 sons is used rotationally then inbreeding asymptotes to (2N−1+1)/(22N+1−2). When there are more founder dams than sires, the asymptotic inbreeding can be reduced even further by using the semen of half-sib G1 sires in rotation. Optimal rotations using full-sib G1 sires or generation 2 (or later) sires will lower the asymptotic inbreeding also, but generally not by much. It was found that when unlimited frozen semen from a specified group of sires was available, the optimal mating plan was achieved by selecting each generation the sire with the least co-ancestry with the current female of the dam line.
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Saleh, Abdullah, and Qassem H. Jalut. "Static And Seismic Stability Analysis of Small Hydraulic Structure Under Seepage Load: A Case Study of Rawanduz Dam." Diyala Journal of Engineering Sciences 14, no. 3 (2021): 51–61. http://dx.doi.org/10.24237/djes.2021.14305.
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The analysis of the reservoir-dam-foundation coupled system is much more complicated than that of the structure alone because of the difference between the characteristics of the foundation and concrete dam. The small hydraulic structure may be built in seismically active regions, where ground movement would impose earth pressures. The safety of these structures should be investigated quite critically by logical and precise methods. Rawanduz dam subjected to EL-Centro earthquake-S00E component excitation was chosen as a typical case of study. The static and dynamic stability of the Rawanduz dam had been analyzed and evaluated. A 2-D Finite Element model employed using ANSYS software to simulated dam response. The water was modeled as an additive mass according to the theory of Westergaard on the back of the dam while leaving the rest of the reservoir inactive. The dam body is presumed homogeneous, elastic, and isotropic properties for mass material. The soil was assumed to be flexible and analyzed as a nonlinear material. When assessing the stability of the structure under the influence of the seepage loads, the structure was founded safe because the exit gradient value was equal to (0.25), which was less than the critical value of the exit gradient (1/6). Results showed that the principal stresses at the heel and toe of the dam were founded important to study the stability. The static and dynamic analysis findings indicate that the stress values are very low, hence satisfy the normal criteria for protection factors relating to the tensile and compressive strength of the concrete.
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Balan, Isabela, Irina Dana Tutunaru, Claudiu Pricop, and Ioan Balan. "Studies Regarding the Safety in Operation of Ezer Reservoir." Present Environment and Sustainable Development 8, no. 1 (2014): 91–104. http://dx.doi.org/10.2478/pesd-2014-0008.
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Abstract The dam of the non-permanent reservoir Ezer, located on Jijia river is an earth dam with a maximum height of 6.18 m, which provides a global retention to the canopy of 10.330 million cubic meters. The dam founded on weak, muddy soils suffered in the years 1989 and 1992 downstream slope failures of the fillings. It was found that hydrostatic levels were high in the piezometric wells and that consolidation of the foundation soil was reduced. This paper presents a brief history of the dam and aspects regarding the behaviour monitoring of Ezer non-permanent reservoir during the years 2000-2012.
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Ingram, Peter. "Frontiers of shopper marketing, customer engagement and nonlinear creative – An interview with Peter Ingram, founder of BlendedBusiness." Journal of Digital Asset Management 6, no. 2 (2010): 97–108. http://dx.doi.org/10.1057/dam.2010.10.
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Gimenes, Evandro, and Gabriel Fernández. "Hydromechanical analysis of flow behavior in concrete gravity dam foundations." Canadian Geotechnical Journal 43, no. 3 (2006): 244–59. http://dx.doi.org/10.1139/t05-095.
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A key requirement in the evaluation of sliding stability of new and existing concrete gravity dams is the prediction of the distribution of pore pressure and shear strength in foundation joints and discontinuities. This paper presents a methodology for evaluating the hydromechanical behavior of concrete gravity dams founded on jointed rock. The methodology consisted of creating a database of observed dam behavior throughout typical cycles of reservoir filling and simulating this behavior with a distinct element method (DEM) numerical model. Once the model is validated, variations of key parameters including lithology, in situ stress, joint geometry, and joint characteristics can be incorporated in the analysis. A site-specific simulation of a typical reservoir cycle was carried out for Albigna Dam, Switzerland, founded on granitic rock, to assess the nature of the flow regime in the rock foundations and to evaluate the potential for sliding surfaces other than the damrock interface to develop. The factor of safety against sliding of various rock wedges of differing geometry present within the dam foundations was also evaluated using the DEM model and conventional analytical procedures. Estimates of crack propagation patterns and corresponding uplift pressures and factors of safety against sliding along the damrock interface obtained with the DEM were also compared with those from simplified procedures currently used in engineering practice. It was found that in a jointed rock, foundation uplift estimates after crack development obtained from present design guidelines can be too conservative and result in factors of safety that are too low and do not correspond to the observed behavior.Key words: hydromechanical, jointed rock, flow, dam design.
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Signorile, A. L., J. Wang, P. W. W. Lurz, S. Bertolino, C. Carbone, and D. C. Reuman. "Do founder size, genetic diversity and structure influence rates of expansion of North American grey squirrels in Europe?" Diversity and Distributions 20, no. 8 (2014): 918–30. http://dx.doi.org/10.1111/ddi.12222.
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Deschamps, R. J., C. S. Hynes, and R. Wigh. "Analysis and Stabilization of Failing Earth Dam Founded on Claystone." Journal of Performance of Constructed Facilities 13, no. 4 (1999): 143–51. http://dx.doi.org/10.1061/(asce)0887-3828(1999)13:4(143).
Full textDissertations / Theses on the topic "Founder DDM"
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Büscher, Barbara. "Lost & Found." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2009. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-25431.
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Blau, Winfried. "Ontologically Founded Causal Sets: Constraints for a Future Physical Theory of Everything." Winfried Blau, 2016. https://slub.qucosa.de/id/qucosa%3A7600.
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The paper is located on the border between physics, mathematics and philosophy (ontology). The latter is required to embed the dualistic by nature mathematics into a monistic metatheory. It is shown, that a consequent philosophical monism and an approach which starts from the origin of the universe imposes significant constraints on a physical Theory-of-Everything. This may be helpful for finding such a theory. A philosophical system that is monistic and at the same time structured clear enough to be compatible with mathematical thinking is the Hegelian dialectic logic. With the aid of this logic the necessary existence of a causal chain embedded in the general, unconditional and timeless being is proved constructively. In the causal chain our entire reality is coded. It is termed by Hegel as determinate being in contrast to being. The chain has a beginning, representing the birth of the universe (big bang) and the beginning of time. It is isomorphic to the natural numbers. The half-ring structure of the natural numbers induces a secondary causal network. Thus the ontological approach results in a special version of the theory or causal sets. The causal network is topologically homeo-morphic to an infinite dimensional Minkowski cone. Each prime number corresponds to a dimension. Hypothetical small 'bumps” of 4D spacetime (Brane) in the direction of the extra dimensions of the Minkowski manifold mean topological defects, which can be interpreted as curvature of spacetime. This means a bridge to the general theory of relativity. On the other hand, the bumps may be interpreted as objects with which one can handle similar to the strings in string theory.<br>Die Arbeit bewegt sich im Grenzgebiet zwischen Physik, Mathematik und Philosophie (Ontologie). Letztere wird benötigt, um die vom Wesen her dualistische Mathematik in eine monistische Metatheorie einzubetten. Es wird gezeigt, dass ein konsequenter philosophischer Monismus und ein Denken vom Ursprung des Universums her einer physikalischen Theorie-von-Allem erhebliche Randbedingungen auferlegen. Für das Auffinden einer solchen Theorie kann das hilfreich sein. Ein philosophisches System, dass monistisch ist und zugleich klar genug strukturiert um mit der mathematischen Denkweise kompatibel zu sein ist die Hegelsche dialektische Logik. Unter Zuhilfenahme dieser Logik wird die notwendige Existenz einer in das allgemeine, unbedingte und zeitlose Sein eingebetteten, aber vom Chaos dieses Seins unbeeinflussten kausalen Kette konstruktiv bewiesen. In dieser kausalen Kette ist unsere gesamte Realität codiert, von Hegel als Dasein im Gegensatz zum Sein bezeichnet. Die Kette hat einen Anfang, der den Anfang des Universums und den Anfang der Zeit darstellt. Sie ist isomorph zu den natürlichen Zahlen. Deren Halbring-Struktur induziert ein sekundäres kausales Netzwerk. Somit ist das Ergebnis der ontologischen Herangehensweise eine spezielle Version der Theorie der kausalen Mengen. Das Netzwerk ist topologisch homöomorph ist zu einem unendlich dimensionalen Minkowski-Kegel. Jeder Primzahl entspricht eine Dimension. Hypothetische kleine „Ausbeulungen“ oder „Bumps“ der 4D-Raumzeit (Brane) in Richtung der Extradimensionen der Minkowski-Mannigfaltigkeit bedeuten topologische Baufehler, die sich als Krümmung der Raumzeit interpretieren lassen und eine Brücke zur allgemeinen Relativi-tätstheorie darstellen. Auf der anderen Seite lassen sich die Ausbeulungen der Brane als Objekte deuten, mit denen man ähnlich umgehen kann wie mit den Strings der Stringtheorie.
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Harlander, Uwe. "On periodic solutions found in simple ocean models with fixed surface fluxes." Wissenschaftliche Mitteilungen des Leipziger Instituts für Meteorologie ; 4 = Meteorologische Arbeiten aus Leipzig ; 2 (1996), S. 151-169, 1996. https://ul.qucosa.de/id/qucosa%3A15062.
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In einer kürzlich erschienenen Arbeit haben Greatbatch und Zhang darauf hingewiesen, daß interdekadische Oszillationen in einem Ozean-Becken-Modell gefunden werden können, falls dieses mit festgehaltenen Wärmeflüssen angetrieben wird. Diese Oszillationen haben Ahnlichkeit mit jenen, welche Delworth et al. in einem gekoppelten Ozean-Atmosphären-Modell fanden. In der vorliegenden Arbeit werden Mechanismen verglichen, die in drei einfachen Ozeanmodellen mit festgehaltenen Antrieben zu Schwingungen führen. Die Experimente mit einem drei-dimensionalen Becken-Modell werden ausführlich beschrieben. In diesen Experimenten zeigt sich der voll dreidimensionale Charakter der Schwingungen. Die Oszillationen stehen im Zusammenhang mit einer Reduktion der Ausbreitungsgeschwindigkeit von kalten Randstörungen im nordwestlichen Teil des Ozeanbeckens. Der Grund dafür ist ein anomal großes Gebiet tiefreichender Konvektion in dieser Region. Kräftige Temperaturanomalien enstehen dann infolge von anomaler Advektion. Ganz wesentlich für das Vorkommen von ungedämpften Oszillationen ist eine Verlängerung der Zeitspanne mit starker (schwacher) meridionaler Zirkulation im drei-dimensionalen Modell (\"Schleifen\"-Modell) durch einen Überkompensationsmechanismus. Letzendlich bestätigen diese Experimente die Ansicht von Winton, daß sich die Oszillationen in drei-dimensionalen Modellen nicht mit einfachen \"Schleifen\"-Modellen nachvollziehen lassen.<br>In a recent paper Greatbatch and Zhang reported the finding of interdecadal oscillations in an idealized ocean basin forced by constant heat flux. This oscillation has many similarities to that found by Delworth et al. in a coupled ocean-atmosphere model. We have used three simple models with fixed surface fluxes, a box model, a Welander-like loop model and a three-level three-dimensional ocean basin model, in order to compare mechanisms associated with interdecadal oscillations in these models. Our experiments with the basin model revealed the three-dimensional character of the oscillations in three-dimensional models. Self-sustained oscillations are associated with a reduction of the propagation speed of cold anomalies in the north-western corner of the model because of anomalous strong convection in that region. Then anomalous gyre circulation leads to the development of strong temperature anomalies. The extension of the period of strong (low) overturning in the three-dimensional (loop) model
by some overcompensation mechanism is crucial for the occurrence of self-sustained oscillations. In conclusion we confirm Wintons view that fixed flux variability is not a meridional plane phenomenon related to loop oscillators.
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Diwold, Konrad. "Natural optimization: An analysis of self-organization principles found in social insects and their application for optimization." Doctoral thesis, Universitätsbibliothek Leipzig, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-86174.
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Das Forschungsfeld Schwarmintelligenz, also die Anwendung des Verhaltens dezentraler selbstorganisierender Tierkollektive, im Kontext der Informatik hat eine Reihe von state-of-the-art Kontroll- und Optimierungsmechanismen hervorgebracht. Die Untersuchung selbstorganisierender biologischer Systeme fördert zum einen das Design neuer robuster und adaptiver Algorithmen. Zum anderen kann sie das Verständnis der Funktionalität von selbstorganisierenden Prinzipien, welche in der Natur auftreten, unterstützen. Diese Arbeit deckt beide zuvor beschriebenen Aspekte ab. Unter Verwendung von Modellen und Simulation werden offene Fragen bezüglich der Organisation und des Verhaltens von sozialen Insekten beleuchtet. Weiter werden Abstraktionen von selbstorganisierenden Konzepten, welche man bei sozialen Insekten findet, genutzt, um neue Methoden zur Optimierung zu entwickeln. Der erste Teil dieser Arbeit untersucht allgemeine Aspekte der Arbeitsteilung sozialer Insekten. Zuerst wird die Anpassungsfähigkeit von unterschiedlich großen Kolonien, bezüglich dynamischer Veränderungen in der Umwelt untersucht. Die Ergebnisse zeigen, dass die Fähigkeit einer Kolonie, auf Veränderung in der Umwelt zu reagieren, von der Koloniegröße beeinflusst wird. Ein weiterer Aspekt der Arbeitsteilung, welcher in dieser Arbeit untersucht wird, ist, inwieweit eine räumliche Verteilung von Aufgaben und Individuen einen Einfluss auf die Arbeitsteilung hat. Die Ergebnisse deuten an, dass soziale Insekten von einer räumlichen Trennung, der zu bewerkstelligenden Aufgaben profitieren, da eine solche Trennung die Produktivität der Kolonie erhöht. Das könnte erklären, warum eine räumliche getrennte Anordnung von Aufgaben und Individuen häufig in realen Kolonien sozialer Insekten beobachtet werden kann. Der zweite Teil dieser Arbeit untersucht verschiedene Aspekte von Selbstorganisation bei Honigbienen. Zunächst wird der Einfluss der räumlichen Verteilung von Nestplätzen auf die Nestplatzsuche der europäischen Honigbiene Apis mellifera untersucht. Die Ergebnisse legen nahe, dass die Nestplatzsuche eines Schwarms aktiv durch die Anordnung der Nestplätze in der Umwelt beeinflusst wird. Eine nestplatzreiche Umgebung kann den Prozess eines Schwarms, sich für einen Nestplatz zu entscheiden, stark behindern. Das könnte erklären, warum Honigbienenarten, die geringe Anforderungen an Nestplätze haben, was die Anzahl von potenziellen Nestplätzen natürlich erhöht, eine sehr ungenaue Form der Nestplatzsuche aufweisen. Ein zweiter Aspekt der Honigbienen, welcher untersucht wird, sind die Steuerungsmechanismen, die dem kollektiven Flug eines Bienenschwarms unterliegen. Zwei mögliche Führungsmechanismen, aktive und passive Führung, werden hinsichtlich ihrer Fähigkeit verglichen, die Flugeigenschaften eines echten Honigbienenschwarms zu reproduzieren. Die Simulationsergebnisse bestätigen aktuelle empirische Befunde und zeigen, dass aktive Führung in der Lage ist, Charakteristika fliegender Schwärme widerzuspiegeln. Bei passiver Führung ist das nicht der Fall. Eine Anwendung biologischer Konzepte im Bereich der Informatik wird anhand der Nestplatzsuche demonstriert. Diese ist ein natürlicher Optimierungsprozess, basierend auf einfachen Regeln. Erzielt wird eine lokale Optimierung, die es einem Schwarm ermöglicht, Nestplätze in einer bisher unbekannten Umgebung zu finden und aus diesen den besten Nestplatz zu wählen. Das ist die Motivation, Nestplatzsuche im Bereich der Optimierung anzuwenden. Hierfür wird zuerst das Optimierungspotenzial der biologischen Nestplatzsuche mit Hilfe eines biologischen Modells untersucht. Basierend auf der Nestplatzsuche wird ein abstrahiertes algorithmisches Schema, das so genannte „Bee Nest-Site Selection Scheme“ (BNSSS) entworfen. Basierend auf dem Schema wird der erste Nestplatzsuche inspirierte Optimierungsalgorithmus „Bee-Nest\\\'\\\' für die Anwendung im Bereich von molekular Docking entwickelt. Im Vergleich zu anderen Optimierungsalgorithmen erzielt „Bee-Nest“ eine sehr gute Leistung<br>The application in computer science of the behaviour found in decentralized self-organizing animal collectives -- also known as swarm intelligence -- has brought forward a number of state-of-the art control and optimization mechanisms. Further study of such self-organizing biological systems can foster the design of new robust and adaptive algorithms, as well as aid in the understanding of self-organizing processes found in nature. This thesis covers both of the aspects described above, namely the use of computational models to investigate open questions regarding the organization and behaviour of social insects, as well as using the abstraction of concepts found in social insects to generate new optimization methods. In the first part of this work, general aspects of division of labour in social insects are investigated. First the adaptiveness of different-sized colonies to dynamic changes in the environment is analysed. The findings show that a colony\\\'s ability to react to changes in the environment scales with its size. Another aspect of division of labour which is investigated is the extent to which different spatial distributions of tasks and individuals influence division of labour. The results suggest that social insects can benefit from a spatial separation of tasks within their environment, as this increases the colony\\\'s productivity. This could explain why a spatial organization of tasks and individuals is often observed in real social insect colonies. The second part of this work investigates several aspects of self-organization found in honeybees. First the influence of spatial nest-site distribution on the ability of the European honeybee Apis mellifera to select a new nest-site is studied. The results suggest that a swarm\\\'s habitat can influence its decision-making process. Nest-site rich habitats can obstruct a swarm\\\'s ability to choose a single site if all sites are of equal quality. This could explain why in nature honeybee species which have less requirements regarding a new nest-site have evolved a more imprecise form of nest-site selection than cavity-nesting species. Another aspect of honeybees which is investigated is the guidance behaviour in migrating swarms. Two potential guidance mechanisms, active and passive guidance, are compared regarding their ability to reproduce real honeybee swarm flight characteristics. The simulation results confirm previous empirical findings, as they show that active guidance is able to reflect a number of characteristics which can be observed in real moving honeybee swarms, while this is not the case for passive guidance. Nest-site selection in honeybees can be regarded as a natural optimization process. It is based on simple rules and achieves local optimization as it enables a swarm to decide between several potential nest-sites in a previously unknown dynamic environment. These factors motivate the application of the nest-site selection process to the problem domain of function optimization. First, the optimization potential of the biological nest-site selection process is studied. Then a general algorithmic scheme called ``Bee Nest-Site Selection Scheme\\\'\\\' (BNSSS) is introduced. Based on the scheme the first nest-site inspired optimization algorithm ``Bee-Nest\\\'\\\' is introduced and successfully applied to the domain of molecular docking
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Strehle, Matthias. "Beitrag zur Qualitätssicherung in Gießereien durch die Anwendung statistischer Methoden." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2012. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-101431.
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Es werden die Voraussetzungen für die Anwendung statistischer Methoden in Seriengießereien dargestellt. Dazu wurde zunächst anhand einer umfangreichen Literaturrecherche aufgezeigt, dass der Stand der Technik deutliche Defizite aufweist. Für die Verwendung statistischer Methoden, mit dem Ziel der Ausschussreduktion oder Prozessoptimierung, ist eine Datenbank anzulegen, in der jedem Gussteil eindeutig alle qualitätsrelevanten Prozessparameter zugeordnet sind. In Gießereien werden eine Vielzahl von Prozessdaten gemessen und auf unterschiedlichen Computern gespeichert, jedoch ohne Zusammenhang zum Gussteil und dessen Qualität. Eine Zusammenführung der ungenutzten Daten im Nachhinein ist nicht möglich. Die Stoffströme (Sande, Kerne etc.) wurden vom Rohmaterial bis hin zur Gussteilqualität verfolgt (z. B. mit RFID, Infrarotpyrometer). Es wurde ein Ablaufplan über die Vorgehensweise erstellt und in mehreren Gießereien angewandt. Das Ergebnis war eine vollständige Datenbank der Prozessparameter und Gussteilqualitäten, an der mittels statistischer Methoden die Ursachen für Gussfehler identifiziert worden sind.
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Harlander, Uwe. "On periodic solutions found in simple ocean models with fixed surface fluxes." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-213065.
Full textAbstract:
In einer kürzlich erschienenen Arbeit haben Greatbatch und Zhang darauf hingewiesen, daß interdekadische Oszillationen in einem Ozean-Becken-Modell gefunden werden können, falls dieses mit festgehaltenen Wärmeflüssen angetrieben wird. Diese Oszillationen haben Ahnlichkeit mit jenen, welche Delworth et al. in einem gekoppelten Ozean-Atmosphären-Modell fanden. In der vorliegenden Arbeit werden Mechanismen verglichen, die in drei einfachen Ozeanmodellen mit festgehaltenen Antrieben zu Schwingungen führen. Die Experimente mit einem drei-dimensionalen Becken-Modell werden ausführlich beschrieben. In diesen Experimenten zeigt sich der voll dreidimensionale Charakter der Schwingungen. Die Oszillationen stehen im Zusammenhang mit einer Reduktion der Ausbreitungsgeschwindigkeit von kalten Randstörungen im nordwestlichen Teil des Ozeanbeckens. Der Grund dafür ist ein anomal großes Gebiet tiefreichender Konvektion in dieser Region. Kräftige Temperaturanomalien enstehen dann infolge von anomaler Advektion. Ganz wesentlich für das Vorkommen von ungedämpften Oszillationen ist eine Verlängerung der Zeitspanne mit starker (schwacher) meridionaler Zirkulation im drei-dimensionalen Modell (\"Schleifen\"-Modell) durch einen Überkompensationsmechanismus. Letzendlich bestätigen diese Experimente die Ansicht von Winton, daß sich die Oszillationen in drei-dimensionalen Modellen nicht mit einfachen \"Schleifen\"-Modellen nachvollziehen lassen<br>In a recent paper Greatbatch and Zhang reported the finding of interdecadal oscillations in an idealized ocean basin forced by constant heat flux. This oscillation has many similarities to that found by Delworth et al. in a coupled ocean-atmosphere model. We have used three simple models with fixed surface fluxes, a box model, a Welander-like loop model and a three-level three-dimensional ocean basin model, in order to compare mechanisms associated with interdecadal oscillations in these models. Our experiments with the basin model revealed the three-dimensional character of the oscillations in three-dimensional models. Self-sustained oscillations are associated with a reduction of the propagation speed of cold anomalies in the north-western corner of the model because of anomalous strong convection in that region. Then anomalous gyre circulation leads to the development of strong temperature anomalies. The extension of the period of strong (low) overturning in the three-dimensional (loop) model by some overcompensation mechanism is crucial for the occurrence of self-sustained oscillations. In conclusion we confirm Wintons view that fixed flux variability is not a meridional plane phenomenon related to loop oscillators
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Quaas, Johannes, Bjorn Stevens, Philip Stier, and Ulrike Lohmann. "Interpreting the cloud cover: aerosol optical depth relationship found in satellite data using a general circulation model." Copernicus Publications, 2010. https://ul.qucosa.de/id/qucosa%3A13833.
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Statistical analysis of satellite data shows a positive correlation between aerosol optical depth (AOD) and total cloud cover (TCC). Reasons for this relationship have been disputed in recent literature. The aim of this study is to explore how different processes contribute to one model’s
analog of the positive correlation between aerosol optical depth and total cloud cover seen in the satellite retrievals. We compare the slope of the linear regression between the logarithm of TCC and the logarithm of AOD, or the strength of the relationship, as derived from three satellite data sets to the ones simulated by a global aerosol-climate model. We analyse
model results from two different simulations with and without a parameterisation of aerosol indirect effects, and using dry compared to humidified AOD. Perhaps not surprisingly we find that no single one of the hypotheses discussed in the literature is able to uniquely explain the positive relationship. However the dominant contribution to the model’s
AOD-TCC relationship can be attributed to aerosol swelling in regions where humidity is high and clouds are coincidentally found. This finding leads us to hypothesise that much of the AOD-TCC relationship seen in the satellite data is also carried by such a process, rather than the direct effects of the aerosols on the cloud fields themselves.
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Findeisen, Sebastian. "Zykluszeitreduzierung beim Druckgießen durch mehrteiligen Werkzeugaufbau." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2015. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-161111.
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In der Dissertation wurde der Stand der Technik zum Fertigungsverfahren Druckgießen mit dem Fokus auf die Druckgießwerkzeuge recherchiert und strukturiert aufbereitet. Der Stand der Technik mündet in der Systematik zur Optimierung des Druckgießens. Darin wurde die Problematik ganzheitlich aufgearbeitet, konkretisiert und wesentliche Handlungsfelder, wie das Temperierkonzept, der Werkstoff sowie die Auslegung, herausgearbeitet. Das Handlungsfeld Temperierkonzept wurde fokussiert und daraus das Konzept des mehrteiligenWerkzeuges erarbeitet. DiesesWerkzeugkonzept ermöglicht durch seinen Aufbau eine Maximierung der Wärmeübertragungsfläche, eine Reduzierung des Abstandes der Temperierung zum Gussteil und eine Erhöhung des Wärmeübergangskoeffizienten. Der mehrteilige Aufbau wurde in einem Versuchswerkzeug für das Druckgießen umgesetzt, sukzessive ausgelegt und virtuell abgesichert. Abschließend zeigte die thermische Simulation des Prozess Druckgießen ein Potential zur Reduzierung der Zykluszeit von 12,9s (14%) mit dem mehrteiligen Werkzeug auf. Im Dauerbetrieb konnte prozesssicher, reproduzierbar und dauerhaft eine Zykluszeitreduzierung um 20,5s (23%) nachgewiesen werden.
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Jakobsen, Arne, Janne Fauskanger, Reidar Mosvold, and Raymond Bjuland. "What can be Learned from Comparing Performance of Mathematical Knowledge for Teaching Items found in Norway and in the U.S.?" Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-82592.
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Franke, Simone. "Cupolofen-Register 1879 bis 1893." Fachverlag Schiele & Schön GmbH, 2011. https://slub.qucosa.de/id/qucosa%3A3310.
Full textBooks on the topic "Founder DDM"
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Filip, Vandenbussche, ed. Longing to belong: The life of Dom Mayeul De Caigny (1862-1939) : founder of the Mount St. Benedict Monastery, Trinidad, West Indies in 1912. Mount St. Benedict, 2012.
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Wandel, Uwe Jens. "He found Coburg 'deadly dull'": Herzog Alfred von Sachsen-Coburg und Gotha (1844-1900) : eine Ausstellung des Staatsarchivs Coburg in Zusammenarbeit mit dem Thüringischen Staatsarchiv Gotha. Generaldirektion der Staatlichen Archive Bayerns, 2000.
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Wurster, Charles F. DDT Wars. Oxford University Press, 2015. http://dx.doi.org/10.1093/oso/9780190219413.001.0001.
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DDT Wars is the untold inside story of the decade-long scientific, legal and strategic campaign that culminated in the national ban of the insecticide DDT in 1972. The widespread misinformation, disinformation and mythology of the DDT issue are corrected in this book. DDT contamination had become worldwide, concentrating up food chains and causing birds to lay thin-shelled eggs that broke in the nests. Populations of many species of predatory and fish-eating birds collapsed, including the American Bald Eagle, Osprey, Peregrine Falcon and Brown Pelican. Their numbers recovered spectacularly in the decades following the ban. During the campaign DDT and five other insecticides were found to cause cancer in laboratory tests, which led to bans of these six pesticides by international treaty in 2001. This campaign produced lasting changes in American pesticide policies. The legal precedents broke down the court "standing" barrier, forming the basis for the development of environmental law as we know it today. This case history represents one of the greatest environmental victories of recent decades. DDT is still "controversial" because it has been deceptively interjected into the "climate wars." This campaign was led by the Environmental Defense Fund (EDF), founded in 1967 by ten citizens, most of them scientists, volunteers without special political connections or financial resources. Their strategy was to take environmental problems to court. There were many setbacks along the way in this exciting and entertaining story. The group was often kicked out of court, but a few determined citizens made a large difference for environmental protection and public health. Author Charles Wurster was one of the leaders of the campaign. The first six years of EDF history are described as it struggled to survive. Now EDF is one of the world's great environmental advocacy organizations defending our climate, ecosystems, oceans and public health.
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Lohwasser, Nelo, and Rainer Schreg, eds. Kleine Funde, große Geschichten - Archäologische Funde aus dem Bamberger Dom. University of Bamberg Press, 2021. http://dx.doi.org/10.20378/irb-50035.
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Der Bamberger Dom, das bedeutendste Bauwerk der Stadt, besteht seit gut 1000 Jahren. Prof. Dr. Walter Sage, nachmalig erster Inhaber des Lehrstuhls für Archäologie des Mittelalters und der Neuzeit (AMANZ) an der Universität Bamberg, führte dort von 1969-72 großangelegte Ausgrabungen durch. Er ließ nahezu das gesamte Hauptschiff öffnen, dazu große Bereiche der Seitenschiffe. Man traf Fundamente aller Bauphasen an, dazu viele Bestattungen und eine große Zahl von Kleinfunden. Diese Funde stammen zum Teil von der Innenausstattung des ersten Doms, dessen grundsätzliche Boden- und Wandgestaltung somit gut rekonstruierbar ist. Die wissenschaftliche Aufarbeitung der Funde – 50 Jahre nach ihrer Bergung – war Anlass und Inhalt einer Sonderausstellung im Historischen Museum, bewerkstelligt vom Lehrstuhl AMANZ in Zusammenarbeit mit dem Historischen Verein und dem Historischen Museum Bamberg, den Eigentümern der Funde und unterstützt vom Erzbistum Bamberg. Mit dieser Ausstellung und dem Begleitheft, beides hauptsächlich von Studierenden erarbeitet, feiert der Lehrstuhl AMANZ zudem sein 40-jähriges Bestehen. Bamberg Cathedral, the most important building in the city, was built more than 1000 years ago. Prof. Dr. Walter Sage, who later became the first professor of medieval and postmedieval archaeology at the University of Bamberg, carried out large-scale excavations from 1969-72. He researched almost the entire nave as well as large areas of the aisles. Foundations of all construction phases were found, as well as many burials and a large number of small finds. Many finds were part of the interior of the first cathedral, allowing a reconstruction of the floor and the wall design. 50 years after the excavations the analysis of these finds is part of a new scientific project. Together with the 40th anniversary of the chair of medieval and postmedieval archaeology this is the occasion for a special exhibition in the Historical Museum Bamberg. The exhibition and this booklet were realized in cooperation with the Bamberg Historical Association, who owns the finds today, and with the support of the Archdiocese of Bamberg. Conception, exhibition texts as well as most of the article were prepared by students of the chair of medieval and postmedieval archaeology.
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Gao, Yanhong, and Deliang Chen. Modeling of Regional Climate over the Tibetan Plateau. Oxford University Press, 2017. http://dx.doi.org/10.1093/acrefore/9780190228620.013.591.
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The modeling of climate over the Tibetan Plateau (TP) started with the introduction of Global Climate Models (GCMs) in the 1950s. Since then, GCMs have been developed to simulate atmospheric dynamics and eventually the climate system. As the highest and widest international plateau, the strong orographic forcing caused by the TP and its impact on general circulation rather than regional climate was initially the focus. Later, with growing awareness of the incapability of GCMs to depict regional or local-scale atmospheric processes over the heterogeneous ground, coupled with the importance of this information for local decision-making, regional climate models (RCMs) were established in the 1970s. Dynamic and thermodynamic influences of the TP on the East and South Asia summer monsoon have since been widely investigated by model. Besides the heterogeneity in topography, impacts of land cover heterogeneity and change on regional climate were widely modeled through sensitivity experiments.In recent decades, the TP has experienced a greater warming than the global average and those for similar latitudes. GCMs project a global pattern where the wet gets wetter and the dry gets drier. The climate regime over the TP covers the extreme arid regions from the northwest to the semi-humid region in the southeast. The increased warming over the TP compared to the global average raises a number of questions. What are the regional dryness/wetness changes over the TP? What is the mechanism of the responses of regional changes to global warming? To answer these questions, several dynamical downscaling models (DDMs) using RCMs focusing on the TP have recently been conducted and high-resolution data sets generated. All DDM studies demonstrated that this process-based approach, despite its limitations, can improve understandings of the processes that lead to precipitation on the TP. Observation and global land data assimilation systems both present more wetting in the northwestern arid/semi-arid regions than the southeastern humid/semi-humid regions. The DDM was found to better capture the observed elevation dependent warming over the TP. In addition, the long-term high-resolution climate simulation was found to better capture the spatial pattern of precipitation and P-E (precipitation minus evapotranspiration) changes than the best available global reanalysis. This facilitates new and substantial findings regarding the role of dynamical, thermodynamics, and transient eddies in P-E changes reflected in observed changes in major river basins fed by runoff from the TP. The DDM was found to add value regarding snowfall retrieval, precipitation frequency, and orographic precipitation.Although these advantages in the DDM over the TP are evidenced, there are unavoidable facts to be aware of. Firstly, there are still many discrepancies that exist in the up-to-date models. Any uncertainty in the model’s physics or in the land information from remote sensing and the forcing could result in uncertainties in simulation results. Secondly, the question remains of what is the appropriate resolution for resolving the TP’s heterogeneity. Thirdly, it is a challenge to include human activities in the climate models, although this is deemed necessary for future earth science. All-embracing further efforts are expected to improve regional climate models over the TP.
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Sutherland, Tori N., and Kirk Lalwani. Duchenne’s Muscular Dystrophy. Edited by Kirk Lalwani, Ira Todd Cohen, Ellen Y. Choi, and Vidya T. Raman. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780190685157.003.0035.
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Duchenne’s muscular dystrophy (DMD) is a progressive X-linked recessive disorder that affects boys and female carriers. It is the most common dystrophy with onset in childhood in the United States. It is associated with severe, progressive proximal muscle weakening due to absence of dystrophin, which is found in skeletal and cardiac muscles This chapter presents a review of anesthetic considerations for patients with DMD in the context of the disease’s natural history with special consideration for cardiomyopathy evaluation and management, restrictive lung disease evaluation, and management and postoperative ventilation. The chapter covers an overview of the disease; etiology and pathogenesis; cognitive, neuromuscular, cardiac, and pulmonary clinical presentation; diagnosis and management; and special anesthetic considerations.
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Grant, Jon E., Sarah A. Redden, and Eric W. Leppink. Trichotillomania and Skin Picking Disorder. Edited by Christopher Pittenger. Oxford University Press, 2017. http://dx.doi.org/10.1093/med/9780190228163.003.0051.
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This chapter summarizes the clinical characteristics and treatment of trichotillomania and skin picking disorder (excoriation), collectively known as body focused repetitive behavior disorders. These two conditions are found in the new chapter on OCD and related disorders in DSM-5; skin picking disorder is a new DSM diagnosis. They are conceptualized as related to OCD due to the repetitive nature of the symptomatology, but they also differ in important ways. The neural underpinnings of these disorder are only beginning to come into focus, and much work is needed. The best-proven psychotherapy for these conditions is a form of CBT known as habit reversal therapy. Principles of pharmacotherapy are not clearly established, though there have been promising early studies of a number of agents.
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Hartmann, Andrea S., and Ulrike Buhlmann. Prevalence and Underrecognition of Body Dysmorphic Disorder. Edited by Katharine A. Phillips. Oxford University Press, 2017. http://dx.doi.org/10.1093/med/9780190254131.003.0005.
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Large epidemiologic studies across Western countries that used DSM-IV and DSM-5 diagnostic criteria have found a point prevalence rate of body dysmorphic disorder (BDD) of 1.7% to 2.9%. The prevalence of BDD is higher in clinical samples. Gender ratios in epidemiologic studies show a slight preponderance of females, which is confirmed in most convenience and clinical samples. Prevalence rates appear to be highest in younger (adolescent) subsamples. Other demographic correlates include a lower likelihood of being in a committed relationship, less education, lower household income, and higher unemployment rates. Key clinical correlates from epidemiologic studies are greater depression, anxiety, and somatoform symptoms and more frequent suicidal ideation and suicide attempts. Reasons for the underrecognition of BDD include shame, fear of not being understood by the clinician, lack of readiness for treatment, skepticism about treatment or belief in the superiority of other forms of treatment (such as cosmetic treatment), and lack of financial coverage for treatment.
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Mello, Nelci Veiga. Uma escola - Muitas histórias. Brazil Publishing, 2021. http://dx.doi.org/10.31012/978-65-5861-512-5.
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This work is about a political arm of social movements during the period of 1953 to 1964 in Campo Mourão city. These social movements have had many faces, such as Partido Comunista represented by Saint Benedict village, General Union of Workers, Campina da Lagoa city and Little School of People. The Little School had been founded by bishop Dom Eliseu Simões Mendes when he arrived in Mossoró city, located in Northern of Brazil, where a big ecclesiastical work with poor people was developed. That work have had in its bases one specific theory that believes in one point of view for adult people – education for transformation, in another words – to teach to read and write with real problems that are around you. But in 1964, had a big change side in the brasilian politic. This happening brought the banishment of all those social movements, include Little School of Workers and, in this place, that poor people have had another school only for children.
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Al-Yagon, Michal, and Malka Margalit. Hope and Coping in Individuals with Specific Learning Disorder. Edited by Matthew W. Gallagher and Shane J. Lopez. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780199399314.013.29.
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This chapter reviews and integrates empirical findings regarding hope as a major personal resource among individuals with specific learning disorder (SLD). First, it describes the Diagnostic and Statistical Manual of Mental Disorders (fifth edition; DSM-5) diagnostic criteria for SLD and briefly illustrates the major difficulties that individuals with SLD may experience in the academic, social, emotional, and behavioral domains. Next, it presents an overview of the empirical literature regarding hope as reported by children and adolescents with SLD in different age groups and its relations with additional personal resources such as the sense of coherence and coping with age-appropriate academic and social challenges. Possible factors that may contribute to the lower resources found in SLD and their implications are explored, as well as future research directions and interventional implications.
Book chapters on the topic "Founder DDM"
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Balogun, R. Ayodeji, E. Adesanya Adefisan, Z. Debo Adeyewa, and E. Chilekwu Okogbue. "Thermodynamic Environment During the 2009 Burkina Faso and 2012 Nigeria Flood Disasters: Case Study." In African Handbook of Climate Change Adaptation. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-45106-6_143.
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AbstractCritical or extreme atmospheric conditions which could result in flood disasters are important output for numerical weather forecast. This research applied thermodynamic variables to investigate the environment of two flood scenarios in West Africa as captured by the Tropical Rainfall Measurement Mission (TRMM) satellite. Results from the two case studies of flood events, in (i) Burkina Faso and (ii) Nigeria savannah, investigated in this research work, indicated that the September 1st 2009 flood, which was as a result of a single volumetric rainfall event of 408,070.60 ((mm/h)*km2) with 65% convective region in Burkina Faso, was initiated by interactions between extremely large lower tropospheric wind shear and cold pool dynamics. The case of the Nigeria savannah floods between July and September, 2012, was triggered by both continuous rainfall and release of water from the lagdo dam in Cameroon, which affected most of the communities in the river Benue axis. The continuous rainfalls were found to be as a result of extremely high convergence of moisture in the river Benue axis at different locations and periods. One of such rainfall events, as captured by TRMM satellite during September 29, 2012 in the Nigeria rainforest zone, indicated that the volumetric rainfall is 351,310.9 ((mm/h)*km2) with only 34% convective portion. From these results, it can be deduced that a combination of thermodynamic environmental variables, volume rainfall, and other satellite-derived convective parameters could provide important information for flood forecasting.
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El-Ashaal, A. A., A. A. Abdel-Motaleb, and S. M. Elkholy. "Upgrading and reconstruction of a collapsed embankment founded on salty soil." In Dam Maintenance and Rehabilitation. Routledge, 2017. http://dx.doi.org/10.1201/9781315140728-111.
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Lawrence, M., and C. Martin. "Estimating rock mass strength for a concrete dam founded on good rock." In Rock Mechanics: Meeting Society's Challenges and Demands. Taylor & Francis, 2007. http://dx.doi.org/10.1201/noe0415444019-c126.
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"Deep Green Machines." In American Perspectives on Learning Communities and Opportunities in the Maker Movement. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-8310-3.ch013.
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Deep Green Machines (DGM) was founded in the village of Rutledge, Missouri with a population of approximately 100 residents. Nearby, there are other larger specialized communities, which include the Anabaptist Mennonite community and three intentional communities with a focus on sustainable ecological living. DGM was established as a disruptor to break a continuing cycle of low wages and defunct microeconomic practices. In the end, it was the heterogeneousness of these communities that prevented DGM from making an impact, and ultimately led to it relocating. This chapter explores Deep Green Machines.
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Romero, Juan. "Empty Categories and Clitics." In The Syntactic Variation of Spanish Dialects. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780190634797.003.0004.
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In Spanish, third person object and dative clitics have a number of contrasting properties. Dative clitics allow doubling, and this is one of the reasons why it is interpreted as agreement. This chapter argues that dative clitics do not uniformly represent agreement. Specifically, when there is no overt doubling DP, dative clitics are incorporated determiners. Evidence for this proposal is found in DOM. When the clitic is doubled by a DP, the object cannot receive DOM; however, when it is not, DOM can, and (for most speakers) must be assigned to the object when conditions for DOM assignment are met. Evidence can also be found in the behavior of dative clitics in some laísta dialects. In these dialects, laísmo only shows up in those contexts where accusative Case can be assigned. Since accusative clitics are incorporated determiners, they are not compatible with doubling contexts.
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Hazay, Máté, and Ante Munjiza. "Introduction to the Combined Finite-Discrete Element Method." In Computational Modeling of Masonry Structures Using the Discrete Element Method. IGI Global, 2016. http://dx.doi.org/10.4018/978-1-5225-0231-9.ch006.
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This chapter presents a general overview of the combined Finite-Discrete Element Method (FEM/DEM) which is considered as a state-of-the-art technique for the mechanical analysis of masonry structures. In a FEM/DEM simulation each discrete element representing a stone block is discretized into finite elements in order to describe the deformability of the blocks. This chapter deals with the main steps of the FEM/DEM including contact detection, contact interaction, fracture and fragmentation algorithms, calculation of deformations and the time integration of the equation of motion. The FEM/DEM is advantageously used to simulate transition from continua to discontinua processes which may lead to the collapse of the structure. Some examples for practical applications found in the literature are mentioned.
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Cowen, Philip, Paul Harrison, and Tom Burns. "Anxiety and obsessive–compulsive disorders." In Shorter Oxford Textbook of Psychiatry. Oxford University Press, 2012. http://dx.doi.org/10.1093/med/9780199605613.003.0009.
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Chapter 9 discusses how the symptom of anxiety is found in many disorders. In the anxiety disorders, it is the most severe and prominent symptom, and it is also prominent in the obsessional disorders, although these are characterizedby their striking obsessional symptoms. In DSM-IV, obsessive–compulsive disorder is classifi ed as a type of anxiety disorder, but in ICD-10 it is classified separately. We have followed the DSM convention and included obsessional disorders in this chapter, as well as covering generalized anxiety disorder (GAD), phobias, panic, mixed anxiety and depression, transcultural variations, and obsessive-compulsive disorder (OCD).
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Raggi, F., R. Jappelli, and C. Callari. "Coupled finite element analysis of the construction of a large Italian embankment dam founded on stiff clay." In Numerical Models in Geomechanics. Taylor & Francis, 2004. http://dx.doi.org/10.1201/9781439833780.ch87.
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Cabrera, M., S. Senent, C. Olalla, and R. Jiménez. "Sliding stability analysis of a gravity dam founded on a rock mass with an impersistent joint set." In Rock Engineering and Rock Mechanics: Structures in and on Rock Masses. CRC Press, 2014. http://dx.doi.org/10.1201/b16955-91.
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Clayton, Terry, and Nicole West. "In Search of the Good Dam." In Advances in Business Strategy and Competitive Advantage. IGI Global, 2015. http://dx.doi.org/10.4018/978-1-4666-7294-9.ch015.
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There are few places in the world where hydropower development is progressing as intensely as the Mekong River Basin in Southeast Asia. In searching for ways of supporting public dialog on development, the Challenge Program on Water and Food found that the hydropower sector speaks of social responsibility only in terms of “benefit sharing,” while the development sector and Non-Governmental Organizations (NGOs) largely ignore or are unaware of Corporate Social Responsibility (CSR). The chapter begins with an overview of hydropower development in the Mekong, considers some possible reasons for the absence of CSR in the ongoing debate over hydropower development, and concludes with recommendations for designing a project to build on the findings from this research.
Conference papers on the topic "Founder DDM"
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ČESONIENĖ, Laima, Kristina LINGYTĖ, Daiva ŠILEIKIENĖ, and Midona DAPKIENĖ. "GROUNDWATER QUALITY DYNAMICS IN THE TERRITORY OF FORMER PESTICIDE WAREHOUSE." In RURAL DEVELOPMENT. Aleksandras Stulginskis University, 2018. http://dx.doi.org/10.15544/rd.2017.097.
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Pesticides are used in intensive farming to help fight plant pests and diseases (insecticides, fungicides), kill weeds (herbicides), as well as accelerate the growth of seeds (defoliants), but until 1992 pesticides were kept in improperly equipped warehouses, there was no maintenance or accounting of the pesticides. Consequently, the environment of the warehouse was often polluted. Such sources of pollution are hazardous to the environment. Economic activities in the area have been carried out from 1980 to 1994. Various agricultural chemicals have been stored and used there. Later, in 1997, chemicals (fertilizers and plant protection chemicals) stored in the territory of the warehouse have been collected and removed from the territory. During the inventory of 2009, no chemical substances were found in the territory. In 2010, an investigation carried out in the territory of the pesticide warehouse revealed unacceptable levels of pollution in the soil and the groundwater by pesticides and other toxic and neutral chemicals. In 2012, the polluted territory was cleaned eliminating the remains of buildings, and removing the soil polluted by the pesticides. The aim of the study was to evaluate the impact of the territory of the former pesticide warehouse in Kaunas District Municipality, Bubių Village on the groundwater during the period from 2012 to 2016. The results have shown that the groundwater is mostly polluted with nitrogen compounds, as well as the tendency in increase of chlorides, sodium, and calcium. Minimum and unchanging concentrations of the pesticides (DDD, DDE, DDT) were determined throughout the investigation.
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Zhang, Shuai, Koji Morita, Noriyuki Shirakawa, and Yuichi Yamamoto. "Next Generation Safety Analysis Methods for SFRs—(4) Development of a Computational Framework on Fluid-Solid Mixture Flow Simulations for the COMPASS Code." In 17th International Conference on Nuclear Engineering. ASMEDC, 2009. http://dx.doi.org/10.1115/icone17-75549.
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The COMPASS code is designed based on the moving particle semi-implicit (MPS) method to simulate various complex mesoscale phenomena relevant to core disruptive accidents (CDAs) of sodium-cooled fast reactors (SFRs). The MPS method, which is a fully Lagrangian method, can be extended for fluid-solid mixture flow simulations in a straightforward approach. In this study, a computational framework for fluid-solid mixture flow simulations was developed for the COMPASS code. In the present framework, the passively moving solid (PMS) model, which is originally proposed to describe the motion of a rigid body in a fluid, used to simulate hydrodynamic interactions between fluid and solids. In addition, mechanical interactions between solids were modeled by the distinct element method (DEM). Since the typical time step size in DEM calculation, which uses an explicit time integration scheme, is much smaller than that in MPS calculation, a multi-time-step algorithm was introduced to couple these two calculations. In order to verify the proposed computational framework for fluid-solid mixture flow simulations, a series of experiments of water-dam break with multiple solid rods was simulated using the COMPASS code. It was found that simulations considering only fluid-solid interactions using the PMS model can not reasonably represent typical behaviors of solid rods observed in the experiments. However, results of simulations taking account of solid-solid interactions using DEM as well as fluid-solid ones were in good agreement with experimental observations. It was demonstrated that the present computational framework enhances the capability of the COMPASS code for mesoscale simulations of fluid-solid mixture flow phenomena relevant to CDAs of SFRs. To improve the computational efficiency for fluid-solid mixture flow simulations, it will be necessary to optimize the time step size used in DEM calculations by adjusting DEM parameters based on additional experiments and numerical tests.
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Thavaraj, Thuraisamy, Garry Stevenson, and David Siu. "Seismic Deformation Assessment of a Dam Founded on Low Plastic Fine-Grained Soils under Strong Earthquake Shaking." In Geo-Chicago 2016. American Society of Civil Engineers, 2016. http://dx.doi.org/10.1061/9780784480120.022.
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Ishii, Eiji, Yoshihiro Sukegawa, and Hiroshi Yamada. "Fuel Spray Simulation With Collision Jets for Automobile Engines." In ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2010. http://dx.doi.org/10.1115/fedsm-icnmm2010-30098.
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Fuel injectors for automobile engines atomize fuel into multi-scale free surfaces: liquid films formed at the fuel-injector outlet, ligaments generated by the liquid-film breakup, and droplets generated from the ligaments within the air/fuel mixture region. We previously developed a fuel spray simulation combining the liquid-film breakup near the injector outlet with the air/fuel mixture. The liquid-film breakup was simulated by a particle method. The fuel-droplet behavior in the air/fuel mixture region was simulated by a discrete droplet model (DDM). In this study, we applied our method to simulate fuel sprays from a fuel injector with collision jets. The simulation results were compared with the measurements—the mean diameter of droplet in spray, D32, was 35 percent larger than measured D32. We also studied the effects of DDM injection conditions on the spray distribution in the air/fuel mixture region—diameter distributions of injected DDM-droplets were given by the liquid-film breakup simulation, or by Nukiyama-Tanazawa’s theory. The diameter distribution of droplets near the injector outlet was found to affect the spray distribution within the air/fuel mixture region, mainly around the leading edge of spray.
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Han, Zhaoying, Tricia A. Thornton-Wells, John C. Gore, and Benoit M. Dawant. "Effect of registration on corpus callosum population differences found with DBM analysis." In SPIE Medical Imaging, edited by John B. Weaver and Robert C. Molthen. SPIE, 2011. http://dx.doi.org/10.1117/12.877182.
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Ishii, Eiji, Yoshihito Yasukawa, Yoshihiro Sukegawa, and Hiroshi Yamada. "A Fuel-Spray Simulation Considering Fuel-Jet Breakup Near Fuel Injector and Composition of Air/Fuel Mixture." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-12380.
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To simulate multi-scale free surfaces in the fuel spray of an injector for automobile engine, we combined a liquid-film-breakup simulation and an air/fuel-mixture simulation. The liquid-film breakup near the injector outlet was simulated by using a particle method, and the air/fuel mixture after the liquid-film breakup was simulated by using a “discrete droplet model” (DDM). Distributions of droplet diameters and velocities, calculated in the liquid-film breakup simulation, were used as the injection condition of DDM. We applied our new method to simulate the spray from a collision fuel injector. The simulation results were verified by comparing them with measurements. The liquid-film breakup near the injector outlet and the behavior of the air/fuel mixture qualitatively agreed with the measurements. We found that out new method was useful to the fuel-spray simulation for automobile engines.
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Wiegers, Tjamme, Ernest J. J. Van Breemen, Willem G. Knoop, and Joris S. M. Vergeest. "Required and Requested Information During Conceptual Engineering Design As Found by Categorization of Empirical Data." In ASME 1996 Design Engineering Technical Conferences and Computers in Engineering Conference. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/96-detc/dtm-1533.
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Abstract To offer effective computer support in the early stages of the engineering process, we need more insight in the information needs of the designer during these stages. For this reason we developed a new method to observe the information handling of a designer, without forcing him or her to think aloud. We applied this method in ten sessions in which a subject had to perform a design assignment. We compared the information actually requested by the subjects, with the set of information that would be generally required according to an independent expert designer. Individual subjects differed much in the engineering aspects about which they requested information. Only 10% of the engineering aspects was requested by seven or more of them. The number of requested aspects corresponds well with the extent to which their concepts meet the requirements. We present a detailed picture of these differences and discuss possible explanations. An independently measured variable in the experiment was the designer’s performance in terms of the requirements met by the resulting design objects. We found a significant positive effect of the amount of different requested engineering aspects on this performance. The interpretation of this finding and its implications will be discussed.
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Smith, William, and Huei Peng. "A Surrogate Discrete Element Method for Terramechanics Simulation of Granular Locomotion." In ASME 2015 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/detc2015-46104.
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Numerical modeling methods, such as the discrete element method (DEM), are an increasingly popular alternative to traditional semi-empirical terramechanics techniques. While DEM has many advantages, including the ability to model more complex running gear and terrain profiles, it has not reached widespread popularity due to its high computation costs. In this study a surrogate DEM model (S-DEM) was developed to maintain the simulation accuracy and capabilities of DEM with reduced computation costs. This marks one of the first surrogate models developed for DEM, and the first known model developed for terramechanics. By storing wheel-soil interaction forces and soil velocities extracted from constant-velocity DEM simulations, S-DEM can quickly perform new dynamic wheel locomotion simulations. Using both DEM and S-DEM, wheel locomotion simulations were performed on flat and rough terrain. S-DEM was found to reproduce drawbar pull and driving torque well in both cases, though wheel sinkage errors were significant at times. Computation costs were reduced by three orders of magnitude in comparison to DEM, bringing the benefits of DEM modeling to vehicle design and control. The techniques used to develop S-DEM may be applicable to other common DEM applications, such as soil drilling, excavating, and plowing.
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Sˇtrubelj, Luka, and Iztok Tiselj. "Modeling of Dam-Break Flows With Conservative Level Set Method." In ASME 2006 2nd Joint U.S.-European Fluids Engineering Summer Meeting Collocated With the 14th International Conference on Nuclear Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/fedsm2006-98082.
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Conservative level set method, introduced by E. Olsson in 2005 is discussed. Calculations of dam-break on dry and wet surface were performed. The method was found to be appropriate for modeling of the dam-break flows.
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Weaver, Dustin, and Sanja Miskovic. "Analysis of Coupled CFD-DEM Simulations in Dense Particle-Laden Turbulent Jet Flow." In ASME 2020 Fluids Engineering Division Summer Meeting collocated with the ASME 2020 Heat Transfer Summer Conference and the ASME 2020 18th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/fedsm2020-20274.
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Abstract In this paper, coupled CFD-DEM simulations of dense particle-laden jet flow are performed using CFDEM® coupling interface that couples LAMMPS-based LIGGGHTS® DEM engine with OpenFOAM CFD framework. Suspensions of mono-sized spherical glass particles with 80 microns diameter and a mass loading of 0.23 and 0.86 are considered. Three different CFD meshes are used with an average mesh resolution dimension of 3.06, 2.67, and 1.86 particle diameters and it is determined that mesh resolution does not change results for void fraction calculation (using the divided model) of the CFD-DEM equations. Samples of particle flux are taken at 0.1, 10, and 20 nozzle diameters along the axial direction of the jet region. The numerical results for particle flux are compared with a well cited experimental data found in literature. The CFD-DEM simulations in turbulent jet flow are found to be highly sensitive to initial particle velocity inputs but the experimental data provide sufficient information to produce comparable results.
Reports on the topic "Founder DDM"
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Madu, Laura, Jacqueline Sharp, and Bobby Bellflower. Efficacy of Integrating CBT for Mental Health Care into Substance Abuse Treatment in Patients with Comorbid Disorders of Substance Abuse and Mental Illness. University of Tennessee Health Science Center, 2021. http://dx.doi.org/10.21007/con.dnp.2021.0004.
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Abstract: Multiple studies have found that psychiatric disorders, like mood disorders and substance use disorders, are highly comorbid among adults with either disorder. Integrated treatment refers to the treatment of two or more conditions and the use of multiple therapies such as the combination of psychotherapy and pharmacotherapy. Integrated therapy for comorbidity per numerous studies has consistently been superior to the treatment of individual disorders separately. The purpose of this QI project was to identify the effectiveness of Cognitive Behavioral Therapy (CBT) instead of current treatment as usual for treating Substance Use Disorder (SUD) or mental health diagnosis independently. It is a retrospective chart review. The review examines CBT's efficacy for engaging individuals with co-occurring mood and substance u se disorders in treatment by enhancing adherence and preventing disengagement and relapse. Methods: Forty adults aged 26-55 with a DSM-IV diagnosis of a mood disorder of Major Depressive Disorder and/or anxiety and concurrent substance use disorder (at least weekly use in the past month). Participants received 12 sessions of individual integrated CBT treatment delivered with case management over a 12-week period. Results: The intervention was associated with significant improvements in mood disorder, substance use, and coping skills at 4, 8, and 12 weeks post-treatment. Conclusions: These results provide some evidence for the effectiveness of the integrated CBT intervention in individuals with co-occurring disorders. Of note, all psychotherapies are efficacious; however, it would be more advantageous to develop a standardized CBT that identifies variables that facilitate treatment outcomes specifically to comorbid disorders of substance use and mood disorders. It is concluded that there is potentially more to be gained from further studies using randomized controlled designs to determine its efficacy.