Academic literature on the topic 'Partition plan'
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Journal articles on the topic "Partition plan"
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Yıldırım, Kemal, Elif Güneş, and Gülcan Pervan Yilmaz. "The effects of workstation partition heights on employees’ perceptions in open-plan offices." Journal of Corporate Real Estate 21, no. 2 (May 13, 2019): 148–66. http://dx.doi.org/10.1108/jcre-03-2018-0010.
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Purpose The purpose of this paper is to determine the effects of environmental factors in open-plan offices with the same characteristics but with different workstation partition heights (1.10, 1.40 and 1.65 m) on perceptual evaluations of office employees. Design/methodology/approach In this research, the effects of environmental factors on employees’ perceptual evaluations in open-plan offices at the Gölbaşı Region of Ankara were measured with a detailed questionnaire. The research data were obtained from 81 employees who agreed to fill out the questionnaire and who use open-plan offices. Findings It was found that the office environments with 1.65 m workstation partition heights were more favorably assessed for each of the items of planning and of privacy that form the dependent variables compared to the office environments with 1.10 and 1.40 m partition heights. On the other hand, the office environments with the 1.10 and 1.40 m partition heights were more favorable for lighting items than the 1.65 m partition height office environments. In addition, young employees had a more positive tendency toward the perceptions of environmental factors, including different workstation partition heights in open-plan offices, compared to older employees. Research limitations/implications Results of this research provide a fundamental contribution for the impact of various partition heights that have substantial implications on the perceptions of open-plan office environments. At this point, as open-plan offices have important effects on the quality of employees’ work experiences, the influence of various partition heights on the performance of employees should be emphasized in future studies. The diversity of performance (reading comprehension, calculation, design, drawing, etc.) will be an important decision. Originality/value The significant contribution of this research is that it provides valid data and makes a valuable contribution to the body of knowledge in open-plan office design.
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Bhatti, Muhammad Nawaz. "Politics of Water Resource Management in the Indus River Basin: A Study of the Partition of Punjab." Liberal Arts and Social Sciences International Journal (LASSIJ) 4, no. 2 (November 14, 2020): 60–70. http://dx.doi.org/10.47264/idea.lassij/4.2.6.
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The British Government of India divided the Muslim majority province of Punjab into Eastern and Western Punjab. But the partition line was drawn in a manner that headworks remained in India and irrigated land in Pakistan. The partition of Punjab was not scheduled in the original plan of the division of India. Why was it partitioned? To answer this question, the study in the first instance tries to explore circumstances, reasons, and conspiracies which led to the partition of Punjab which led to the division of the canal irrigation system and secondly, the impact of partition on water resource management in the Indus River Basin. Descriptive, historical, and analytical methods of research have been used to draw a conclusion. The study highlights the mindset of Indian National Congress to cripple down the newly emerging state of Pakistan that became a root cause of the partition of Punjab. The paper also highlights why India stopped water flowing into Pakistan on 1st April 1948 and the analysis also covers details about the agreement of 4th May 1948 and its consequences for Pakistan.
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Julistiono, Eunike Kristi, Lilianny Siegit Arifin, and Bisatya Widadya Maer. "LIGHTWEIGHT AND MULTI-PURPOSE PARTITION FOR VERTICAL HOUSING." DIMENSI (Journal of Architecture and Built Environment) 48, no. 2 (December 16, 2021): 149–56. http://dx.doi.org/10.9744/dimensi.48.2.149-156.
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Vertical housings have been developed to solve housing quality degradation due to rapid urbanization. These housings are often lack of privacy and comfort, since the lay-out mostly consists of one open plan space with limited area. This paper presents a lightweight and multi-purpose partition to improve the living quality in vertical housings. The lightweight characteristic is intended to minimize structural loads, while the multi-purpose property allows the partition to be transformed into some furniture for spatial efficiency. A literature review and material surveys were performed prior to material selection and the design process. Then, physical model experiments were carried out to simulate the installation process and the transformation process of the partition modules into some furniture. Result show that the partition’s weight is only 11-36.7% of the common partition wall, and when installed, the transformable property enables an adaptable space which can be adjusted to the occupants’ different conditions.
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Shanker Prasad, Bhanu. "CORRELATIONS AND QUERY PROCESSING." International Journal of Advanced Research 8, no. 9 (September 30, 2020): 811–16. http://dx.doi.org/10.21474/ijar01/11726.
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It is known that optimization of join queries based on average selectivities is sub-optimal in highly correlated databases. Relations are naturally divided into partitions , each partition having substantially different statistical characteristics in such databases. It is very compelling to discover such data partitions during query optimization and create multiple plans for a given query , one plan being optimal for a particular combination of data partitions. This scenario calls for the sharing of state among plans, so that common intermediate results are not recomputed. We study this problem in a setting with a routing-based query execution engine based on eddies. Eddies naturally encapsulate horizontal partitioning and maximal state sharing across multiple plan. The purpose of this paper is to present faster execution time over traditional optimization for high correlations, while maintaining the same performance for low correlations.
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SINANOGLOU, PENNY. "BRITISH PLANS FOR THE PARTITION OF PALESTINE, 1929–1938." Historical Journal 52, no. 1 (February 27, 2009): 131–52. http://dx.doi.org/10.1017/s0018246x08007346.
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ABSTRACTThe 1937 Peel Commission proposal for the partition of British mandatory Palestine has generally been framed as the precursor to the United Nations partition plan of 1947. This article demonstrates the importance of tracing the roots of the 1937 Peel Commission plan back to conversations taking place in the Colonial Office and government of Palestine as early as 1929. A close analysis of dialogues over territorial division and of preliminary partition plans, particularly those drawn up by L. G. Archer Cust and D. G. Harris, leads to the conclusion that Britain's focus on the ideal of representative government played a primary role in the development of partition proposals. This article argues that inter-ethnic violence played a much smaller role in the development of partition proposals than has previously been thought. Instead, partition was proposed as a solution to the political implications of non-representative government in Palestine, a topic constantly in the spotlight thanks to the League of Nations.
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HERSHCO, TSILLA. "France and the Partition Plan: 1947–1948." Israel Affairs 14, no. 3 (July 2008): 486–98. http://dx.doi.org/10.1080/13537120802127747.
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Horrall, Thomas R., and Parker W. Hirtle. "Partition system for open‐plan office spaces." Journal of the Acoustical Society of America 77, no. 6 (June 1985): 2208. http://dx.doi.org/10.1121/1.391694.
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Hossam Eldien, Hany, and Umaru Bongwirnso. "Impact of Partition types on Architecture design studios acoustical environment." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 263, no. 1 (August 1, 2021): 5847–57. http://dx.doi.org/10.3397/in-2021-3328.
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Working in Architecture design studios environment requires various activities. Interaction, communication and meetings could affect the speech intelligibility and the speech privacy conditions. Students Areas with a more silent environment are needed with a minimized level of distraction from surrounding activities, while teamwork and discussion areas with a high level of interaction need a good speech intelligibility. One of the more important elements which can improve the open spaces acoustical conditions is the partitions between workstations.The main purpose of this work is to evaluate the acoustical performance of four partitions types in open plan offices; 1.10m two sides partition height, 1,50m front side partitions, 1,50m one side partitions and 1.50 two sides partitions. This Study was conducted in the College of Architecture, Imam Abdulrhman Bin Faisal University, KSA. Based on ISO 3382-3, Speech Transmission Index, STI in the nearest workstation, Distraction distance rD, privacy distance rP, A-weighted background noise level L,A,B and A-weighted SPL of speech at 4 metres L,A,S,4m have been measured. It was found that the best results can be obtained by 1.50m front side and 1.50m two sides partitions.
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Song, Sicheng, Yanhui Sun, and Chao Chen. "Numerical Simulation of Macro-Segregation Phenomena in Transition Blooms with Various Carbon Contents." Metals 14, no. 3 (February 22, 2024): 263. http://dx.doi.org/10.3390/met14030263.
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This paper presents a numerical simulation of the steel grade transition from the ladle nozzle to the solidification end of the bloom. The simulation is based on models encompassing fluid flow, solidification, heat transfer, an electromagnetic field, and solute transport. To validate the accuracy of the steel grade transition model, transition blooms of high-carbon steel are sampled. Subsequently, the model is applied to investigating the steel grade transition between medium-carbon steel and low-carbon steel. The findings indicate that the regions exhibiting significant differences between their molten steel flow velocity and bloom casting speed in the strand model are primarily concentrated within 1 m below the meniscus. Additionally, the mushy zone in the strand model possesses a substantial volume. Solute elements continuously permeate the liquid phase from the solid phase through the mushy zone. Consequently, the distribution of solute elements in the transition bloom is primarily influenced by the molten steel flow in the tundish and macro-segregation in the casting process. The segregation degree of each solute element varies among grades with different carbon contents. In the austenite phase, the segregation degree of each element follows the order C > Si > Mo > Mn > Cr > Ni, while in the ferrite phase, the segregation degree is ordered as C > Si = Mn. Considering macro-segregation, the transition bloom partition model proves to be more stringent than the original partition method. This results in longer transition blooms when a significant difference exists between the new and old grades. For example, in Scheme 1, the original plan transition bloom length is 8.88 m, whereas the new plan transition bloom length is 10.88 m. Similarly, in Scheme 2, the original plan transition bloom length is 34.64 m, and the new plan transition bloom length is 35.16 m. Conversely, shorter partition intervals occur when there is an overlap in the composition of the new and old grades. In Scheme 3, the original plan partition interval for the new and old grades is 4.08 m, while the new plan partition interval is reduced to 0.94 m.
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Khalidi, Walid. "Revisiting the UNGA Partition Resolution." Journal of Palestine Studies 27, no. 1 (1997): 5–21. http://dx.doi.org/10.2307/2537806.
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This article examines the 1947 UN resolution recommending the partition of Palestine into an Arab and a Jewish state as the fulfillment of fifty years of Zionist efforts to establish a Jewish state in Palestine and as the opportunity to expand that state. The article analyzes the components of the partition plan itself in the light of the demographic and land ownership realities of the time and discusses the implications to the present day of the general acceptance of the Zionist version of events.
Dissertations / Theses on the topic "Partition plan"
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Langer, Robin. "Cylindric plane partitions, lambda determinant, commutators in semicircular systems." Thesis, Paris Est, 2013. http://www.theses.fr/2013PEST1087/document.
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Cette thèse se compose de trois parties. La première partie est consacrée aux partitions planes cylindriques, la deuxième aux lambda-déterminants et enfin la troisième aux commutateurs dans les systèmes semi-circulaires. La classe des partitions planes cylindriques est une généralisation naturelle de celle des partitions planes inverses. Borodin a donnée récemment une série génératrice pour les partitions planes cylindriques. Notre premier résultat est une preuve bijective de cette identité utilisant les diagrammes de croissance de Fomin for la correspondance RSK généralisée. Le deuxième résultat est un (q, t)-analogue de la formule de Borodin, qui généralise un résultat d'Okada. Enfin le troisième résultat de la première partie est une description combinatoire explicite du poids de Macdonald intervenant dans cette formule, qui utilise un modèle de chemins non-intersectant pour les partitions planes cylindriques. Les matrices à signes alternants ont ́été découvertes par Robbins et Rumsey alors qu’ils étudiaient les λ-déterminants. Dans la deuxième partie de cette thèse nous démontrons une généralisation à plusieurs paramètres de ce λ-déterminant, généralisant un résultat récent de di Francesco. Comme le λ-déterminant, notre formule est un exemple du phénomène de Laurent. Les systèmes semi-circulaires ont ́été introduits par Voiculescu afin d' ́étudier les algèbres de von Neumann des groupes libres. Dans la troisième partie de la thèse, nous étudions les commutateurs dans l'algèbre engendré par un système semi-circulaire. Nous avons mis en ́évidence une matrice possédant une structure auto-similaire intéressante, qui nous permet de donner une formule explicite pour la projection sur l'espace des commutateurs de degré donnée. En utilisant cette expression, nous donnons une preuve simple du fait que les systèmes semi-circulaires engendrent des facteursThis thesis is divided into three parts. The first part deals with cylindric plane partitions. The second with lambda-determinants and the third with commutators in semi-circular systems. Cylindric plane partitions may be thought of as a natural generalization of reverse plane partitions. A generating series for the enumeration of cylindric plane partitions was recently given by Borodin. The first result of section one is a new bijective proof of Borodin's identity which makes use of Fomin's growth diagram framework for generalized RSK correspondences. The second result is a (q, t)-analog of Borodin's identity which extends previous work by Okada in the reverse plane partition case. The third result is an explicit combinatorial interpretation of the Macdonald weight occuring in the(q, t)-analog using the non-intersecting lattice path model for cylindric plane partitions. Alternating sign matrices were discovered by Robbins and Rumsey whilst studying λ-determinants. In the second part of this thesis we prove a multi-parameter generalization of the λ-determinant, generalizing a recent result by di Francesco. Like the original λ-determinant, our formula exhibits the Laurent phenomenon. Semicircular systems were first introduced by Voiculescu as a part of his study of von Neumann algebras. In the third part of this thesis we study certain commutator sub algebras of the semicircular system. We find a projection matrix with an interesting self-similar structure. Making use of our projection formula we given an alternative, elementary proof that the semicircular system is a factor
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Mihal, Marek. "Vybrané části stavebně technologického projektu - Biotechnologické a biomedicínské centrum Akademie věd a Univerzity Karlovy." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-240061.
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Subject of this diploma thesis is the construction and technological solutions to the main building of biotechnology and biomedicine centre in Vestec. The aim of a thesis is to propose time, technical and technological construction processes of construction. The content of a thesis is the project of site equipment, time and financial plan of construction, assembly machines, studies of realization main technological phase, inspection and test plan for plasterboard partition, technological regulations for plasterboard partition, metal facade and contact insulation system ETICS.
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Dimitrov, Evgeni (Evgeni Simeonov). "Scaling limits of random plane partitions and six-vertex models." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/117872.
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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Mathematics, 2018.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 235-239).
We present a collection of results about the scaling limits of several models from integrable probability. Our first result concerns the asymptotic behavior of the bottom slice of a Hall-Littlewood random plane partition. We show the latter concentrates around a limit shape and in two different scaling regimes identify the fluctuations around this shape with the GUE Tracy- Widom distribution and the narrow wedge initial data solution to the Kardar-Parisi-Zhang (KPZ) equation. The second result concerns the limiting behavior of a class of six-vertex models in the quadrant, and we obtain the GUE-corners process as a scaling limit for this class near the boundary. Our final result, joint with Ivan Corwin, demonstrates the (long predicted) transversal 2/3 critical exponent for the height functions of the stochastic sixvertex model and asymmetric simple exclusion process (ASEP). The algebraic parts of our arguments involve the construction and use of degenerations and modifications of the Macdonald difference operators to obtain rich families of observables for the models we consider. These formulas are in terms of multiple contour integrals and provide a direct access to quantities of interest. The analytic parts of our arguments include the detailed asymptotic analysis of Fredholm determinants and contour integrals through steepest descent methods. An important aspect of our approach, is the combination of exact formulas with more probabilistic arguments, based on various Gibbs properties enjoyed by the models we study.
by Evgeni Dimitrov.
Ph. D.
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Petry, Tobias Brignol. "Avoiding control plane partition in software defined networks through cellular networks : assessin opportunities and linitattions." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2015. http://hdl.handle.net/10183/127451.
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Redes Definidas por Software ajudam a simplificar a programabilidade da rede ao desacoplar o plano de controle dos dispositivos de encaminhamento, e implementá-lo em um controlador logicamente centralizado. Apesar de permitir uma separação de conceitos mais clara, essa característica cria também uma relação de dependência entre controlador e dispositivos. Falhas no plano de controle prejudicam a visibilidade do estado da rede no controlador e podem tornar a rede inutilizável caso os dispositivos de encaminhamento sejam isolados. A relevância deste problema motivou uma série de propostas, incluindo a distribuição física de instâncias de controle e a delegação de tarefas aos dispositivos de encaminhamento. Esta dissertação contém a proposta e a avaliação de uma arquitetura que usa redes celulares de dados (4G) como enlaces reservas para o plano de controle. Nenhum trabalho anterior explorou esta ideia, apesar da pesquisa recente envolvendo Redes Definidas por Software e redes sem fio. A avaliação experimental permite uma melhor compreensão ao responder três perguntas: (i) Como o comportamento do tráfego do plano de controle é afetado pelas características de enlaces celulares, (ii) quão rapidamente o plano de controle é migrado para o enlace reserva quando uma falha ocorre e (iii) como funções de rede que dependem do estado da rede em um instante se comportam em tal arquitetura. Apesar da já esperada maior latência dos enlaces celulares, esta arquitetura mantém o funcionamento parcial de tarefas que dependem de visão global da rede quando falhas ocorrem nos enlaces primários, de maneira simples e com custo acessível. O grau de manutenção de tais tarefas é diretamente relacionado com sua dependência da rapidez de reação do plano de controle a eventos de rede. O principal benefício de prevenir a partição do plano de controle é a manutenção de uma visão global consistente da rede.Software Defined Networks simplify network programmability by detaching the control plane from forwarding devices and deploying it into a logically centralized controller. While this allows a clearer separation of concerns, it also creates a dependency between them. Failures in the control plane break the controller view of the network state and could render the network unusable if forwarding devices cannot be reached. The relevance of this problem has led to a range of proposals, including physical distribution of controller instances and delegation of concerns to forwarding devices. This dissertation features the proposal and evaluation of an architecture that leverages cellular data networks (4G) as control plane backup links. No previous work has explored this idea, despite the recent research intersecting SDN and wireless networks. The experimental evaluation provides insights towards answering three research questions: (i) How is the behavior of control plane traffic affected by the characteristics of cellular links, (ii) how quickly is the control plane handed over to the backup link when a failure occurs and (iii) how well do network functions that rely on a snapshot of the network state behave on such an architecture. Despite the expected higher latency of cellular links, this architecture maintains partial functionality of tasks that depend on global network awareness when failures occur in primary control links in a simple, affordable fashion. The degree to which the functionality of these tasks is maintained is directly related to its dependency on the timeliness of control plane reaction to network events. The main benefit of preventing control plane partition is to maintain a consistent global view of the network.
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Ben, Ahmed Daho Okacha. "Vérification de programmes de commande numérique pour l'usinage de poches : une application du partitionnement du plan." Limoges, 1998. http://www.theses.fr/1998LIMO0020.
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L'emulation logicielle des directeurs de commande numerique des machines-outils est un moyen efficace pour faciliter la mise au point de programmes piece et leur validation. Ces derniers sont verifies, mais aussi optimises, au moyen d'une serie de tests geometriques et technologiques. Pour affiner cette validation, nous proposons un ensemble d'applications liees a l'usinage de poches, une tache frequemment rencontree dans la fabrication de pieces mecaniques. Nous avons pour cela procede a la modelisation geometrique des trajectoires de l'outil de coupe par application du partitionnement du plan. Un graphe planaire decrivant les informations geometriques et topologiques implicitement definies par les trajectoires de l'outil est obtenu. L'utilisation de cette methode connue de la geometrie algorithmique a cependant necessite dans notre contexte industriel l'elaboration de traitements specifiques. D'une part, afin de determiner les points d'intersection dans le cas des chevauchements (complet ou incomplet) entre les aretes, et d'autre part, afin de modeliser les configurations geometriques de l'usinage qui sont a l'origine de la non connexite du graphe decrivant le partitionnement. Ainsi une representation complete des trajectoires de l'outil (traces) est obtenue. Afin de quantifier les recouvrements des surfaces balayees par l'outil, nous avons introduit le concept d'histoire d'une cellule du partitionnement. Pour chaque region de la poche, le nombre de passages de l'outil est determine. Ainsi, nous avons donne a la representation geometrique des regions de la poche une semantique liee a l'usinage. Ce concept nous permis de determiner la quantite de matiere enlevee le long d'une trajectoire, les passes d'usinage a vide et la variation de la largeur radiale le long de la trajectoire globale de l'outil. Nous avons propose aussi l'extraction de caracteristiques de forme a partir du modele geometrique de la piece usinee. Enfin, pour mettre en evidence la complexite globale de l'algorithme, nous etudions les complexites des differentes etapes de construction du partitionnement. Puis, nous procedons a une evaluation experimentale en presentant differents resultats concernant des exemples realistes issus d'un systeme de cfao.
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Baptista, Diogo Pedro Ferreira Nascimento. "Iteradas de aplicações do plano no plano." Doctoral thesis, Universidade de Évora, 2008. http://hdl.handle.net/10174/12257.
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Neste trabalho estudamos as iteradas de aplicações do plano no plano. Usando as técnicas da dinâmica simbólica em aplicações do plano no plano, tendo sempre por base a teoria de amassamento de Milnor e Thurston e o formalismo da dinâmica simbólica desenvolvido por Sousa Ramos, abordamos diferentes aspectos qualitativos da dinâmica das aplicações de Lozi.
Assim, através da dinâmica simbólica introduzida por Yutaka Ishii, começamos por refor-mular a fronteira do espaço dos parâmetros correspondente às aplicações de Lozi equivalentes à ferradura de Smale. No seguimento, apresentamos um método que permite a construção da bacia de atracção para o atractor de uma qualquer aplicação de Lozi.
Ainda usando a dinâmica simbólica para as aplicações de Lozi, apresentamos um método que fazendo uso de expansões em fracções contínuas, nos permite calcular o maior dos expoentes de Lyapunov de uma aplicação de Lozi.
Com a introdução do conceito de ponto crítico e subsequentemente de sequência de amassamento para as aplicações de Lozi, partimos para uma a construção de uma partição de Markov do seu espaço de fases. Desse modo, é possível a caracterização completa do espaço dos parâmetros através da introdução do conceito de curva de amassamento, que mostramos serem curvas isentrópicas. Consequentemente, obtemos a descrição em termos da entropia topológica da família das aplicações de Lozi.
### Abstract - In this work, we study the iterations of two dimensional maps. Using symbolic dynamics techniques for two dimensional maps, based on both the kneading theory of Milnor and Thurston and the formalism of symbolic dynamics developed by Sousa Ramos, we studied the qualitative aspects of the dynamics of Lozi maps.
Thus, through the symbolic dynamics introduced by Yutaka Ishii, through the correction of symbolic sequence that characterized the first tangency between stable and unstable manifolds, we reformulate the border for the Smale horseshoes. Following this work, we present a method that allows the construction of the basin of attraction for the Lozi attractor. Even using the symbolic dynamics, we introduce a new method, using continuous fractions expansions that allow us to compute the largest Lyapunov exponent.
Through the kneading sequence for Lozi map, we characterize the region in the parameter space were we have the kneading curves and we also give a method to the construction of a partition of Markov for the Lozi attractors. Consequently we characterize the topological entropy for the Lozi map, and costruct a new topological invariant, the second invariant.
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Foltánek, Jan. "Centrum polymerních systémů ve Zlíně - stavebně technologická příprava výstavby." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265715.
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The thesis deals with a technological project of Polymer System Centre in Zlín. It focuses on financial documentation and a time schedule of the construction. The technological project in detail focuses on implementation of a fabric of the Polymer System Centre. The thesis includes a technical report which suggests procedure of the construction. The technological documentation includes a plan of the construction site arrangement, a time schedule, a financial plan for the construction, a budget, a technological report suggesting partitions made of magnesium slabs, a control plan, a test plan and health and safety plan.
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Jbantova, Mariana G. "State spill policies for state intensive continuous query plan evaluation." Link to ETD, 2007. http://www.wpi.edu/Pubs/ETD/Available/etd-050207-222839/.
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Breton, Marc. "Les plasmides pSci de Spiroplasma citri GII3 : caractérisation fonctionnelle et rôle dans la transmission par l'insecte vecteur." Thesis, Bordeaux 2, 2009. http://www.theses.fr/2009BOR21673/document.
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Les plasmides pSci de Spiroplasma citri GII3 possèdent une structure mosaïque avec de nombreuses régions conservées. Des dérivés du plasmide pSci2 ont été produits par délétions successives et leur capacité de réplication a été évaluée. Le plus petit réplicon obtenu ne contient plus qu’une CDS (pE) et ses régions flanquantes. L’inactivation dans un vecteur navette du gène pE est suffisante pour abolir la réplication de ce plasmide dans S. citri. Des dérivés des pSci ont été introduits efficacement dans S. kunkelii et S. phoeniceum, deux spiroplasmes phytopathogènes pour lesquels aucun outil génétique n’était disponible jusqu’à présent. La stabilité des dérivés des pSci a également été évaluée par leur capacité à persister en l’absence de pression de sélection. L’instabilité ségrégationnelle des plasmides dans lesquels soj a été délété ou inactivé indique que la protéine de partition Soj/ParA est essentielle au maintien des plasmides pSci. L’incompatibilité sélective entre un plasmide pSci et ses dérivés a été exploitée pour produire une collection de souches possédant des profils plasmidiques différents. L’analyse des phénotypes d’acquisition et de transmission de plusieurs de ces mutants suggère que la CDS traG portée par le pSci6 est essentielle à la transmission de S. citri GII3. En revanche, les plasmides pSci1-5, codant les protéines adhésine-like ScARPs, ne sont indispensables ni à l’acquisition ni à la transmission. Dans le cadre de ce travail, plusieurs outils génétiques ont été adaptés aux mollicutes. Le promoteur Pxyl/tetO2 a été utilisé pour contrôler l’expression du gène de la spiraline chez S. citri et M. agalactiae. Enfin, un système de linéarisation de plasmide in vivo basé sur l’expression de l’endonucléase I-SceI a été utilisé pour l’élimination de plasmides pSci chez S. citriPlasmids pSci from Spiroplasma citri GII3 display a mosaic gene organization with highly conserved regions. Through successive deletions, various pSci2 derivatives were constructed and assessed for their ability to replicate. The smallest functional replicon consists of one single CDS (pE) and its flanking, intergenic regions. Furthermore, shuttle (S. citri/E. coli) plasmids, in which the pE gene was disrupted, failed to replicate in S. citri, suggesting that PE is the replication protein. S. citri plasmids were efficiently introduced into S. kunkelii and S. phoeniceum, two plant pathogenic spiroplasmas, the transformation of which had never been described before. Studying stability of various pSci-derived plasmids in the absence of selection pressure strongly suggests the occurrence of an active partition system involving the soj-like gene. Selective incompatibility between a given pSci plasmid and its derivatives was used to remove plasmids from the wild-type strain. As a result, a collection of S. citri GII3 mutants differing in their plasmid contents was produced. Experimental transmission of these mutants through injection to or ingestion by the leafhopper vector will provide new insights into the role of plasmid encoded determinants in the biology of S. citri. First data indicated that pSci6 traG is required for insect transmission of S. citri GII3. In contrast, pSci1-5, encoding adhesin-like proteins, are not essential for both transmission and acquisition. In the frame of this work, new genetic tools have been adapted for use in mollicutes. The tetracycline inducible promoter, Pxyl/tetO2, was used to control spiraline gene in S. citri and M. agalactiae. Also, an in vivo linearization system based on the expression of the I-SceI-endonuclease was used to remove pSci plasmids from S. citri
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Yang, Mingming. "Development of the partition of unity finite element method for the numerical simulation of interior sound field." Thesis, Compiègne, 2016. http://www.theses.fr/2016COMP2282/document.
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Dans ce travail, nous avons introduit le concept sous-jacent de PUFEM et la formulation de base lié à l'équation de Helmholtz dans un domaine borné. Le processus d'enrichissement de l'onde plane de variables PUFEM a été montré et expliqué en détail. L'idée principale est d'inclure une connaissance a priori sur le comportement local de la solution dans l'espace des éléments finis en utilisant un ensemble de fonctions d'onde qui sont des solutions aux équations aux dérivées partielles. Dans cette étude, l'utilisation des ondes planes se propageant dans différentes directions a été favorisée car elle conduit à des algorithmes de calcul efficaces. En outre, nous avons montré que le nombre de directions d'ondes planes dépend de la taille de l'élément PUFEM et la fréquence des ondes à la fois en 2D et 3D. Les approches de sélection de ces ondes planes sont également illustrés. Pour les problèmes 3D, nous avons étudié deux systèmes de distribution des directions d'ondes planes qui sont la méthode du cube discrétisé et la méthode de la force de Coulomb. Il a été montré que celle-ci permet d'obtenir des directions d'onde espacées de façon uniforme et permet d'obtenir un nombre arbitraire d'ondes planes attachées à chaque noeud de l'élément de PUFEM, ce qui rend le procédé plus souple.Dans le chapitre 3, nous avons étudié la simulation numérique des ondes se propageant dans deux dimensions en utilisant PUFEM. La principale priorité de ce chapitre est de venir avec un schéma d'intégration exacte (EIS), résultant en un algorithme d'intégration rapide pour le calcul de matrices de coefficients de système avec une grande précision. L'élément 2D PUFEM a ensuite été utilisé pour résoudre un problème de transmission acoustique impliquant des matériaux poreux. Les résultats ont été vérifiés et validés par la comparaison avec des solutions analytiques. Les comparaisons entre le régime exact d'intégration (EIS) et en quadrature de Gauss ont montré le gain substantiel offert par l'EIE en termes de temps CPU.Une 3D exacte Schéma d'intégration a été présenté dans le chapitre 4, afin d'accélérer et de calculer avec précision (jusqu'à la précision de la machine) des intégrales très oscillatoires découlant des coefficients de la matrice de PUFEM associés à l'équation 3D Helmholtz. Grâce à des tests de convergence, un critère de sélection du nombre d'ondes planes a été proposé. Il a été montré que ce nombre ne pousse que quadratiquement avec la fréquence qui donne lieu à une réduction drastique du nombre total de degrés de libertés par rapport au FEM classique. Le procédé a été vérifié pour deux exemples numériques. Dans les deux cas, le procédé est représenté à converger vers la solution exacte. Pour le problème de la cavité avec une source de monopôle située à l'intérieur, nous avons testé deux modèles numériques pour évaluer leur performance relative. Dans ce scénario, où la solution exacte est singulière, le nombre de directions d'onde doit être choisie suffisamment élevée pour faire en sorte que les résultats ont convergé.Dans le dernier chapitre, nous avons étudié les performances numériques du PUFEM pour résoudre des champs sonores intérieurs 3D et des problèmes de transmission d'ondes dans lequel des matériaux absorbants sont présents. Dans le cas particulier d'un matériau réagissant localement modélisé par une impédance de surface. Un des critères d'estimation d'erreur numérique est proposé en considérant simplement une impédance purement imaginaire qui est connu pour produire des solutions à valeur réelle. Sur la base de cette estimation d'erreur, il a été démontré que le PUFEM peut parvenir à des solutions précises tout en conservant un coût de calcul très faible, et seulement environ 2 degrés de liberté par longueur d'onde ont été jugées suffisantes. Nous avons également étendu la PUFEM pour résoudre les problèmes de transmission des ondes entre l'air et un matériau poreux modélisé comme un fluide homogène équivalentIn this work, we have introduced the underlying concept of PUFEM and the basic formulation related to the Helmholtz equation in a bounded domain. The plane wave enrichment process of PUFEM variables was shown and explained in detail. The main idea is to include a priori knowledge about the local behavior of the solution into the finite element space by using a set of wave functions that are solutions to the partial differential equations. In this study, the use of plane waves propagating in various directions was favored as it leads to efficient computing algorithms. In addition, we showed that the number of plane wave directions depends on the size of the PUFEM element and the wave frequency both in 2D and 3D. The selection approaches for these plane waves were also illustrated. For 3D problems, we have investigated two distribution schemes of plane wave directions which are the discretized cube method and the Coulomb force method. It has been shown that the latter allows to get uniformly spaced wave directions and enables us to acquire an arbitrary number of plane waves attached to each node of the PUFEM element, making the method more flexible.In Chapter 3, we investigated the numerical simulation of propagating waves in two dimensions using PUFEM. The main priority of this chapter is to come up with an Exact Integration Scheme (EIS), resulting in a fast integration algorithm for computing system coefficient matrices with high accuracy. The 2D PUFEM element was then employed to solve an acoustic transmission problem involving porous materials. Results have been verified and validated through the comparison with analytical solutions. Comparisons between the Exact Integration Scheme (EIS) and Gaussian quadrature showed the substantial gain offered by the EIS in terms of CPU time.A 3D Exact Integration Scheme was presented in Chapter 4, in order to accelerate and compute accurately (up to machine precision) of highly oscillatory integrals arising from the PUFEM matrix coefficients associated with the 3D Helmholtz equation. Through convergence tests, a criteria for selecting the number of plane waves was proposed. It was shown that this number only grows quadratically with the frequency thus giving rise to a drastic reduction in the total number of degrees of freedoms in comparison to classical FEM. The method has been verified for two numerical examples. In both cases, the method is shown to converge to the exact solution. For the cavity problem with a monopole source located inside, we tested two numerical models to assess their relative performance. In this scenario where the exact solution is singular, the number of wave directions has to be chosen sufficiently high to ensure that results have converged. In the last Chapter, we have investigated the numerical performances of the PUFEM for solving 3D interior sound fields and wave transmission problems in which absorbing materials are present. For the specific case of a locally reacting material modeled by a surface impedance. A numerical error estimation criteria is proposed by simply considering a purely imaginary impedance which is known to produce real-valued solutions. Based on this error estimate, it has been shown that the PUFEM can achieve accurate solutions while maintaining a very low computational cost, and only around 2 degrees of freedom per wavelength were found to be sufficient. We also extended the PUFEM for solving wave transmission problems between the air and a porous material modeled as an equivalent homogeneous fluid. A simple 1D problem was tested (standing wave tube) and the PUFEM solutions were found to be around 1% error which is sufficient for engineering purposes
Books on the topic "Partition plan"
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Katz, Yossi. Partner to Partition: The Jewish Agency's Partition Plan in the Mandate Era. Taylor & Francis Group, 2014.
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Katz, Yossi. Partner to Partition: The Jewish Agency's Partition Plan in the Mandate Era. Routledge, 1998.
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Katz, Yossi. Partner to Partition: The Jewish Agency's Partition Plan in the Mandate Era. Routledge, 1998.
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Katz, Yossi. Partner to Partition: The Jewish Agency's Partition Plan in the Mandate Era. Taylor & Francis Group, 2014.
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Partner to Partition: The Jewish Agency's Partition Plan in the Mandate Era. Routledge, 2014.
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Partner to partition: The Jewish Agency's partition plan in the mandate era. London: Frank Cass, 1998.
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Grewal, J. S. Seventy-Five Days to Partition. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780199467099.003.0015.
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Master Tara Singh issued a statement on 4 June that the 3 June Plan did not give ‘any power or status’ to the Sikhs or anything ‘safeguarding their position or interests’. The ultimate acceptance of the plan, he said, would depend on the terms of reference for the Boundary Commission. A cycle of retaliation and reprisal started before 15 August 1947 as a prelude to an unprecedented exodus in world history. Giani Kartar Singh was thinking of reorganization of the East Punjab to form ‘a Sikh majority province’, including the princely states of the plains. But Nehru was opposed to any kind of political safeguards. His vision of India after Independence had little room for the long-cherished hopes and aspirations of the Akalis.
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Alexandrowicz, C. H. The Partition of Africa by Treaty (1974). Oxford University Press, 2017. http://dx.doi.org/10.1093/acprof:oso/9780198766070.003.0020.
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This chapter analyses the partition of the African continent via treaties. It begins with an introductory examination of pre-nineteenth-century European–African treaty-making and references some classic writers to Africa. It then discusses relevant documents on the ‘scramble’ for titles to African territory. These demonstrate the extent to which normal institutions of the law of nations as originally applied to European–African relations degenerated into instruments of colonial penetration in the second half of the nineteenth century, particularly after the Berlin Conference of 1884–85, which led to a multilaterally conceived plan of partition of the whole continent. Partition took place in two phases, i.e. the transfer of legal titles to territory from the African transferor to the European transferee wherein the ruler still played an active part, and then the absorption of territory by annexation. Effective occupation by the Europeans usually came much later than the acquisition of legal title.
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Fleenor, Tommy. British Mandate of Palestine : Discover the un Partition Plan and Creation of the State of Israel: The Partition of the British Mandate of Palestine Book. Independently Published, 2021.
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Faiz, Asma. In Search of Lost Glory. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780197567135.001.0001.
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This book traces the trajectory of Sindhi nationalism in its quest for lost glory. It examines the Sindhi nationalist movement through its various stages, ranging from pre-partition identity construction in pursuit of the separation of Sindh from Bombay, to the post-partition travails of a community which lost its identity and its capital as a result of the arrival of millions of migrants from India (Muhajirs) and of the actions of an over-bearing central government. Going beyond the state and its power play, the book examines the long history of Sindhi-Muhajir contestation for resources in the post-partition period. The book develops a comprehensive profile of the agency of nationalist parties in Sindh, including the Sindhudesh detour and the later fragmentation of the Jiye Sind movement, which was followed by the emergence of new parties. The author also analyzes the dual role of the Pakistan Peoples Party (PPP) as an ethnic entrepreneur inside the province while operating as a federal party outside Sindh. The book covers nationalist contention at three levels: the struggle for power between Sindh and a dominant Centre; the inter-ethnic conflict between Sindhis and Muhajirs; and the intra-ethnic contestation between the Sindhi nationalists themselves and the PPP.
Book chapters on the topic "Partition plan"
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Ricarte, Joana. "The UN Approach to the ‘Question of Palestine’ During the Cold War." In Rethinking Peace and Conflict Studies, 117–59. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-16567-2_5.
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AbstractThis chapter explores the first phase of the Israeli-Palestinian peace process and its impact on identities in conflict by analyzing the period that starts with the Partition Plan and lasts during the Cold War, until the First Intifada (1947 to 1987). The Cold War period is considered a phase of its own as it marks an important moment in terms of the formulas for solving this conflict—the two-states solution—and the definition of actors that were deemed relevant for such solution. The argument developed is that the reinforcement of dehumanization processes in this period is connected with a defensive reaction of the two competing identities to developments in the international level related with the peace process, that was mainly restricted to elite-driven negotiations toward reaching an agreement regarding the governments and boundaries of the now partitioned territories.
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Medzini, Meron. "Zionist Federations and Zionist Diplomacy in Asia to Ensure United Nations Support for the 1947 Partition Plan." In Between Mumbai and Manila, 111–22. Göttingen: V&R Unipress, 2013. http://dx.doi.org/10.14220/9783737001588.111.
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Campbell, Geoffrey B. "Plane Partitions from MacMahon to Andrews." In Vector Partitions, Visible Points and Ramanujan Functions, 90–109. Boca Raton: Chapman and Hall/CRC, 2024. http://dx.doi.org/10.1201/9781003174158-9.
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Alladi, Krishnaswami. "A Review of “Partition: A Play on Ramanujan”." In Ramanujan's Place in the World of Mathematics, 143–44. India: Springer India, 2013. http://dx.doi.org/10.1007/978-81-322-0767-2_23.
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Hughes, Matthew, and William J. Philpott. "Plans for the Partition of the Ottoman Empire." In The Palgrave Concise Historical Atlas of the First World War, 46–47. London: Palgrave Macmillan UK, 2005. http://dx.doi.org/10.1057/9780230504806_23.
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Alladi, Krishnaswami. "A Review of “Partition: A Play on Ramanujan”." In Ramanujan's Place in the World of Mathematics, 153–54. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-6241-9_24.
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de Berg, Mark, and Amirali Khosravi. "Optimal Binary Space Partitions in the Plane." In Lecture Notes in Computer Science, 216–25. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-14031-0_25.
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Spandri, Elena Anna. "Performing the «miasma» of Indian Partition. Terror and romance in Howard Brenton’s Drawing the Line." In Studi di letterature moderne e comparate, 115–29. Florence: Firenze University Press, USiena Press, 2023. http://dx.doi.org/10.36253/979-12-215-0278-7.10.
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Originally performed at London Hampstead Theatre on 3 December 2013, Howard Brenton’s Drawing the Line dramatizes the Partition of India in two distinct nation-states after the Independence in a lush production that highlights personal conflicts and deflates the genocidal implications of the event that changed the future of the Subcontinent. The essay situates Drawing the Line in the context of Brenton’s lifelong engagement with historical theatre and reflects upon the aesthetic and political significance of the marginal role assigned to violence in the drama. It argues that the play performs a postcolonial discourse on South-Asian history, in which cosmopolitan notions of Britishness, Anglo-Indian relations, and colonial rule are interrogated through an ambiguous dramatic irony that, while deploring British ineptitude in handling the Partition process, in fact represents Partition as a colossal tangle of public and private complicities which mitigates the Raj’s responsibilities and tacitly subscribes to a consolatory determinism.
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Bekos, Michael A., Emilio Di Giacomo, Walter Didimo, Giuseppe Liotta, Fabrizio Montecchiani, and Chrysanthi Raftopoulou. "Edge Partitions of Optimal 2-plane and 3-plane Graphs." In Graph-Theoretic Concepts in Computer Science, 27–39. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-00256-5_3.
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Stanley, Richard P. "A Baker's dozen of conjectures concerning plane partitions." In Combinatoire énumérative, 285–93. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/bfb0072521.
Full textConference papers on the topic "Partition plan"
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Liming, Dong, Liu Weidong, and Shao Jie. "Coexistence of Multiple Partition Plan Based Physical Database Design." In the 5th International Conference. New York, New York, USA: ACM Press, 2017. http://dx.doi.org/10.1145/3057109.3057111.
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Bolander, Thomas, Lasse Dissing, and Nicolai Herrmann. "DEL-based Epistemic Planning for Human-Robot Collaboration: Theory and Implementation." In 18th International Conference on Principles of Knowledge Representation and Reasoning {KR-2021}. California: International Joint Conferences on Artificial Intelligence Organization, 2021. http://dx.doi.org/10.24963/kr.2021/12.
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Epistemic planning based on Dynamic Epistemic Logic (DEL) allows agents to reason and plan from the perspective of other agents. The framework of DEL-based epistemic planning thereby has the potential to represent significant aspects of Theory of Mind in autonomous robots, and to provide a foundation for human-robot collaboration in which coordination is achieved implicitly through perspective shifts. In this paper, we build on previous work in epistemic planning with implicit coordination. We introduce a new notion of indistinguishability between epistemic states based on bisimulation, and provide a novel partition refinement algorithm for computing unique representatives of sets of indistinguishable states. We provide an algorithm for computing implicitly coordinated plans using these new constructs, embed it in a perceive-plan-act agent loop, and implement it on a robot. The planning algorithm is benchmarked against an existing epistemic planning algorithm, and the robotic implementation is demonstrated on human-robot collaboration scenarios requiring implicit coordination.
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Zhang, Y., W. Hu, Y. Rong, and David W. Yen. "Graph-Based Setup Planning and Tolerance Decomposition for Computer-Aided Fixture Design." In ASME 1999 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/imece1999-0662.
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Abstract To bridge the gap between computer-aided process planning and computer-aided fixture design, an automated setup planning and tolerance decomposition method is developed in this research. Directed graph is extended to represent feature/ dimension/tolerance relationships (FTG) and datum/machining feature relationships (DMG). According to different production schemes and manufacturing resource capabilities, setup planning principles and algorithms are explored to automatically extract DMG from FTG. Under the true positioning frame (ANSI Y14.5), tolerance decomposition models are concluded to partition a tolerance into interoperable machining errors, such as locating error, tool alignment error, random process error. The setup plan with allowable locating tolerance specifications is the basis for fixture design. The proposed method is verified in a genuine manufacturing enterprise.
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Li, Zhigang, Jun Li, and Zhenping Feng. "Numerical Investigations on the Leakage and Rotordynamic Characteristics of Pocket Damper Seals: Part II — Effects of Partition Wall Type, Partition Wall Number and Cavity Depth." In ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-25301.
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Effects of partition wall type, partition wall number and cavity depth on the leakage and rotordynamic characteristics of the pocket damper seal (PDS) were numerically investigated using a presented 3D transient CFD method based on the multi-frequency elliptical whirling orbit model. The accuracy and availability of this transient CFD method and the multi-frequency elliptical whirling orbit model were demonstrated with the experimental data of the experimental eight-bladed fully-partitioned pocket damper seal (FPDS). The leakage flow rates and frequency-dependent rotordynamic coefficients of PDS were computed for two types of partition wall (namely conventional PDS and fully-partitioned PDS), four partition wall numbers including the labyrinth seal (no partition wall) and six cavity depths including the plain smooth seal (zero cavity depth) at operational conditions with or without inlet preswirl and 15000rpm rotational speed. The numerical results show that the FPDS has the similar leakage performance and more superior stability capacity than the conventional PDS. The FPDS possesses slightly larger leakage flow rate (∼2.6–4.0% larger) compared to the labyrinth seal. Eight is a preferable value for the partition wall number to gain the best leakage performance of the FPDS with the least manufacturing cost. The FPDS possesses significantly larger stiffness and damping than the labyrinth seal. Increasing partition wall number results in a significant increase in the direct stiffness but limited desirable effect on the effective damping. The FPDS possesses the lowest leakage flow rate when the cavity depth is about 2.0mm. Compared to the plain smooth seal, the FPDS possesses larger positive direct stiffness and significantly less direct damping and effective damping. Increasing cavity depth results in a significant decrease in the stabilizing direct damping and the magnitude of the destabilizing cross-coupling stiffness. H = 3.175mm is a preferable value of the cavity depth for which the effective damping of the FPDS is largest, especially for the concerned frequencies (80–120Hz) where most multistage high-pressure centrifugal compressors have stability problem.
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Shan, Youngbin, Yaoguang Wu, Minjun Qin, Dongming Liu, and Bin Yao. "Interwell Connectivity Study." In Offshore Technology Conference Asia. OTC, 2022. http://dx.doi.org/10.4043/31624-ms.
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Abstract Understanding interwell connectivity is crucial for EOR decision making. In 1990, K.N Wood et al proposed a method to evaluate the interwell Residual Oil using a reactive tracer and a non-partition tracer. A decade later in 2001 (Joseph Tang, 2001), Joseph Tang et al proposed a method to identify the single well near bore residual oil saturation by puff and huff approach in a single well carbonate reservoir. Today the interwell connectivity is still under research. The objective of this paper is to propose latest study to evaluate interwell connectivity through two or more partitioning tracers to estimate the breakthrough, pore volume, sweeping channel geometry, high permeability channel, residual oil saturation, etc Thanks to the new development in tracer technologies, today we can use two distinctive tracers to pump through injection well and collect tracers produced in all production wells. The different partition coefficients for two tracers can reveal the lag factor for the sweeping channel and further derive the statistical channel breakthrough time, pore volume, geometry, tortuosity and residual oil saturation. The theory, derivation and applications of the concepts are described in this paper. Based on the analysis, sweeping channels statistical information can be calculated by a simple mathematical expression of the ratio of two distinctive tracer mass produced from production wells, the ratio of two tracer dynamic partitioning coefficients and the ratio of two injected tracer mass. With this information, operator can investigate a compartmentalization in the field to optimize flooding plan. One 9-piont injection well grid were analyzed, and results are shown in this paper. Those results are important input to operators' reservoir model. It revealed the major sweeping channels and azimuths, the major residual oil channel and their azimuths, the possible tortuous channels and their azimuths which gives operator a direction of where the residual oil resides and how easy or difficult it can be recovered in tertiary oil production. This new theory analyzes sweeping channel statistical information from produced masses of two distinctively partitioning tracers, which follows a rigorous mathematical derivation and setup a volume factor equation relating to produced masses of two partitioning tracers. The partitioning coefficient is also modified by a dynamic factor to better simulate the moving partition in channel rather than the static partitioning between brine and oil.
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Nguyen, Binh Vinh Duc, and Andrew Vande Moere. "The Adaptive Architectural Layout: How the Control of a Semi-Autonomous Mobile Robotic Partition was Shared to Mediate the Environmental Demands and Resources of an Open-Plan Office." In CHI '24: CHI Conference on Human Factors in Computing Systems. New York, NY, USA: ACM, 2024. http://dx.doi.org/10.1145/3613904.3642465.
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Gardner, Christopher, Rajeev Madazhy, and Erik Howard. "Analysis of Contact Pressure Distribution on a Pass Partition Gasket in Conjunction With a Double-Tapered Seal in a High Pressure Heat Exchanger Closure." In ASME 2010 Pressure Vessels and Piping Division/K-PVP Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/pvp2010-26157.
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This paper describes the use of a partition gasket in addition to a self-energized, double-tapered, metal seal in a high pressure heat exchanger. For over 30 years a single gasket was used to seal the heat exchanger partitions against the closure. Although designed to standard code, it often resulted in leaks. Over the past five years, the double-tapered seal has been used extensively to replace welded diaphragms in high pressure heat exchangers in refineries with great success. In this design a tapered-seal is introduced in conjunction with a pass partition gasket for multiple pass heat exchanger, to address problems associated with leaks. Finite Element Analysis (FEA) was performed on the assembly at bolt-up and during internal pressure operation, and contact pressure distribution was analyzed. A 12″ scaled model of the actual heat exchanger closure assembly was designed and hydrostatic pressure tested to ensure relative pressures were held. Actual working-plant applications will be discussed as well.
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Corcoran, Joseph M., Marcel C. Remillieux, and Ricardo A. Burdisso. "Prediction of High Frequency Sonic Boom Noise Transmission Into Buildings Using a Hybrid Analytical-Ray Tracing Approach." In ASME 2012 Noise Control and Acoustics Division Conference at InterNoise 2012. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/ncad2012-0955.
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As part of the effort to renew commercial supersonic flight, a predictive numerical tool to compute sonic boom transmission into buildings is under development. Due to the computational limitations of typical numerical methods used at low frequencies (e.g. Finite Element Method), it is necessary to develop a separate approach for the calculation of acoustic transmission and interior radiation at high frequencies. The high frequency approach can then later be combined with a low frequency method to obtain full frequency vibro-acoustic responses of buildings. An analytical method used for the computation of high frequency acoustic transmission through typical building partitions is presented in this paper. Each partition is taken in isolation and assumed to be infinite in dimension. Using the fact that a sonic boom generated far from the structure will approximate plane wave incidence, efficient analytical solutions for the vibration and acoustic radiation of different types of partitions are developed. This is linked to a commercial ray tracing code to compute the high frequency interior acoustic response and for auralization of transmitted sonic booms. Acoustic and vibration results of this high frequency tool are compared to experimental data for a few example cases demonstrating its efficiency and accuracy.
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Muhammad, Zandy O., and Paul Reynolds. "Monitoring of pedestrian patterns of an office floor under normal walking activity." In IABSE Symposium, Guimarães 2019: Towards a Resilient Built Environment Risk and Asset Management. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2019. http://dx.doi.org/10.2749/guimaraes.2019.1079.
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<p>Innovative designs and development of advanced construction techniques enabling efficient use of materials have resulted in modern building floors that are characterised by longer spans, lighter weight and lower inherent damping. In the particular case of office floors, current design trends are for fewer internal partition walls and more open plan layouts. Therefore, such floors are more susceptible to excessive vibrations originating mainly from pedestrians traversing the floors with random patterns of walking.</p><p>Technological advances in tracking human locations, well-known in computer sciences, by means of in-built video cameras integrated with vision tracking software are rapidly increasing. Yet their potential implementations have not been extended significantly to monitor and track patterns of pedestrians in civil engineering structures, in particular floors. Research of the use of these techniques and pertinent experimental exercises is lagging. This paper provides the results of video monitoring of the occupant activities of a typical office floor under normal use. It is obvious that floors accommodate multi-pedestrians with walking patterns that are somewhat random. Hence, tracking and monitoring of operational floors accompanied by the vibration response measurements give an insight to the actual patterns of walking and thus corresponding in-service vibration responses. It is recognized that distribution of walking patterns with measured vibration responses help capture realistic vibration levels, particularly when combined with statistical methods of vibration serviceability assessment.</p>
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Vaishampayan, Vinay A., and Maiara F. Bollauf. "Communication cost of transforming a nearest plane partition to the Voronoi partition." In 2017 IEEE International Symposium on Information Theory (ISIT). IEEE, 2017. http://dx.doi.org/10.1109/isit.2017.8006848.
Full textReports on the topic "Partition plan"
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Ziegler, Nancy, Nicholas Webb, John Gillies, Brandon Edward, George Nikolich, Justin Van Zee, Brad Cooper, Dawn Browning, Ericha Courtright, and Sandra LeGrand. Plant phenology drives seasonal changes in shear stress partitioning in a semi-arid rangeland. Engineer Research and Development Center (U.S.), September 2023. http://dx.doi.org/10.21079/11681/47680.
Full textAbstract:
Accurate representation of surface roughness in predictive models of aeolian sediment transport and dust emission is required for model accuracy. While past studies have examined roughness effects on drag partitioning, the spatial and temporal variability of surface shear velocity and the shear stress ratio remain poorly described. Here, we use a four-month dataset of total shear velocity (u*) and soil surface shear velocity (us*) measurements to examine the spatiotemporal variability of the shear stress ratio (R) before, during, and after vegetation green-up at a honey mesquite (Prosopis glandulosa Torr.) shrub-invaded grassland in the Chihuahuan Desert, New Mexico, USA. Results show that vegetation green-up, the emergence of leaves, led to increased drag and surface aerodynamic sheltering and a reduction in us* and R magnitude and variability. We found that us* decreased from 20% to 5% of u* as the vegetation form drag and its sheltering effect increased. Similarly, the spatiotemporal variability of R was found to be linked directly to plant phenological phases. We conclude that drag partition schemes should incorporate seasonal vegetation change, via dynamic drag coefficients and/or R, to accurately predict the timing and magnitude of seasonal aeolian sediment fluxes.
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Schweiger, E., Joanna Lemly, Dana Witwicki, Kirk Sherrill, Ruth Whittington, Lewis Messner, Erin Cubley, Katherine Haynes, and Sonya Daw. Florissant Fossil Beds National Monument wetland ecological integrity: 2009?2019 synthesis report. National Park Service, 2023. http://dx.doi.org/10.36967/2300778.
Full textAbstract:
Wetlands at Florissant Fossil Beds National Monument (FLFO) are important because they are biodiversity hotspots and support iconic wildlife. They also provide valuable ?ecosystem services? such as attenuating floods, storing water, recharging aquifers, stabilizing and sequestering sediment, storing carbon, enhancing water quality, and cycling nutrients. This report summarizes 11 years (2009?2019) of wetland monitoring in three sentinel wetland complexes in FLFO. Monitoring included annual samples of 10 wet meadow and fen wetland sites in these complexes. We partition the data into a baseline period encompassing the first three years of our work for which we estimate conditions using a variety of indicators, or vital signs. We then estimate trend across the whole period of record. Results are compared to assessment points that allow us to interpret results in a management relevant context. We collected data on vascular plant species composition, woody species stand structure and damage and mortality of woody stems, soil chemistry, groundwater chemistry, and depth to water at shallow groundwater wells in each complex. We also documented human disturbance in and around each wetland complex. Projections suggest that climate change will likely reduce the number and extent of wetlands in the park and cause declines in the condition of associated flora and fauna and critical ecological functions, such as carbon and water storage. Human use can cause disturbance to wetlands across multiple scales and has well documented relationships with wetland condition. Wetlands at FLFO were impacted by over a century of cattle ranching and other human uses that increased soil erosion, altered hydrology, and made the area more susceptible to invasion by exotic plant species. Disturbance indicators at both a landscape and smaller scale generally showed an intermediate level of disturbance in and around our sentinel sites. Across all sites and indicators, we generally saw lower groundwater levels in response to drought conditions in 2010?2013 and in 2017?2018. However, groundwater at the Hornbek complex responded differently, potentially benefiting from a restoration project that filled incised channels in late summer 2012. Vegetation indicators showed relatively stable and healthy conditions in the park, except for native species cover, which was in intermediate condition.
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Shamblin, Robert, Kevin Whelan, Mario Londono, and Judd Patterson. South Florida/Caribbean Network early detection protocol for exotic plants: Corridors of invasiveness. National Park Service, July 2022. http://dx.doi.org/10.36967/nrr-2293364.
Full textAbstract:
Exotic plant populations can be potentially catastrophic to the natural communities of South Florida. Aggressive exotics such as Brazillian Pepper (Schinus terebinthifolius) and Melaleuca (Melaleuca quinquinervia) have displaced native habitats and formed monocultures of exotic stands (Dalrymple et al. 2003). Nearby plant nurseries, especially the ones outside the boundaries of Biscayne National Park (BISC) and Everglades National Park (EVER), are a continuous source of new exotic species that may become established within South Florida’s national parks. Early detection and rapid response to these new species of exotic plants is important to maintaining the integrity of the parks’ natural habitats and is a cost-effective approach to management. The South Florida/Caribbean Network (SFCN) developed the South Florida/Caribbean Network Early Detection Protocol for Exotic Plants to target early detection of these potential invaders. Three national parks of South Florida are monitored for invasive, exotic plants using this protocol: Big Cypress National Preserve (BICY), Biscayne National Park (BISC), and Everglades National Park (EVER). These national parks include some 2,411,000 acres (3,767.2 square miles [mi2]) that encompass a variety of habitat types. To monitor the entire area for new species would not be feasible; therefore the basic approach of this protocol is to scan major “corridors of invasiveness,” e.g., paved and unpaved roads, trails, trail heads, off road vehicle (ORV) trails, boat ramps, canals, and campgrounds, for exotic plant species new to the national parks of South Florida. Sampling is optimized using a two- to three-person crew: a trained botanist, a certified herbicide applicator, and optionally a SFCN (or IPMT [Invasive Plant Management Team]) staff member or park staff to take photographs and help with data collection. If infestations are small, they are treated immediately by the herbicide applicator. If large, they are reported to park staff and the Invasive Plant Management Team. The sampling domain is partitioned into five regions, with one region sampled per year. Regions include the terrestrial habitats of Biscayne National Park, the eastern region of Everglades National Park, the western region of Everglades National Park, the northern region of Big Cypress National Preserve, and the southern region of Big Cypress National Preserve. Monitoring of roads, trails, and canals occurs while traveling into and through the parks (i.e., travel at 2–10 mph) using motorized vehicles, airboats, and/or hiking. Campgrounds, boat launches, trailheads, and similar areas, involve complete searches. When an exotic plant is observed, a GPS location is obtained, and coordinates are taken of the plant. Photographs are not taken for every exotic plant encountered, but photographs will be taken for new and unusual species (for example a coastal exotic found in inland habitats). Information recorded at each location includes the species name, size of infestation, abundance, cover class, any treatment/control action taken, and relevant notes. During the surveys, a GPS “track” is also recorded to document the areas surveyed and a field of view is estimated. Field notes, pictures, and GPS data are compiled, entered, and analyzed in a Microsoft Access database. Resource briefs (and optional data summary reports) and associated shapefiles and data are then produced and sent to contacts within the corresponding national parks.
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Kirchhoff, Helmut, and Ziv Reich. Protection of the photosynthetic apparatus during desiccation in resurrection plants. United States Department of Agriculture, February 2014. http://dx.doi.org/10.32747/2014.7699861.bard.
Full textAbstract:
In this project, we studied the photosynthetic apparatus during dehydration and rehydration of the homoiochlorophyllous resurrection plant Craterostigmapumilum (retains most of the photosynthetic components during desiccation). Resurrection plants have the remarkable capability to withstand desiccation, being able to revive after prolonged severe water deficit in a few days upon rehydration. Homoiochlorophyllous resurrection plants are very efficient in protecting the photosynthetic machinery against damage by reactive oxygen production under drought. The main purpose of this BARD project was to unravel these largely unknown protection strategies for C. pumilum. In detail, the specific objectives were: (1) To determine the distribution and local organization of photosynthetic protein complexes and formation of inverted hexagonal phases within the thylakoid membranes at different dehydration/rehydration states. (2) To determine the 3D structure and characterize the geometry, topology, and mechanics of the thylakoid network at the different states. (3) Generation of molecular models for thylakoids at the different states and study the implications for diffusion within the thylakoid lumen. (4) Characterization of inter-system electron transport, quantum efficiencies, photosystem antenna sizes and distribution, NPQ, and photoinhibition at different hydration states. (5) Measuring the partition of photosynthetic reducing equivalents between the Calvin cycle, photorespiration, and the water-water cycle. At the beginning of the project, we decided to use C. pumilum instead of C. wilmsii because the former species was available from our collaborator Dr. Farrant. In addition to the original two dehydration states (40 relative water content=RWC and 5% RWC), we characterized a third state (15-20%) because some interesting changes occurs at this RWC. Furthermore, it was not possible to detect D1 protein levels by Western blot analysis because antibodies against other higher plants failed to detect D1 in C. pumilum. We developed growth conditions that allow reproducible generation of different dehydration and rehydration states for C. pumilum. Furthermore, advanced spectroscopy and microscopy for C. pumilum were established to obtain a detailed picture of structural and functional changes of the photosynthetic apparatus in different hydrated states. Main findings of our study are: 1. Anthocyan accumulation during desiccation alleviates the light pressure within the leaves (Fig. 1). 2. During desiccation, stomatal closure leads to drastic reductions in CO2 fixation and photorespiration. We could not identify alternative electron sinks as a solution to reduce ROS production. 3. On the supramolecular level, semicrystalline protein arrays were identified in thylakoid membranes in the desiccated state (see Fig. 3). On the electron transport level, a specific series of shut downs occur (summarized in Fig. 2). The main events include: Early shutdown of the ATPase activity, cessation of electron transport between cyt. bf complex and PSI (can reduce ROS formation at PSI); at higher dehydration levels uncoupling of LHCII from PSII and cessation of electron flow from PSII accompanied by crystal formation. The later could severe as a swift PSII reservoir during rehydration. The specific order of events in the course of dehydration and rehydration discovered in this project is indicative for regulated structural transitions specifically realized in resurrection plants. This detailed knowledge can serve as an interesting starting point for rationale genetic engineering of drought-tolerant crops.
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Lundgren, Jonathan, Moshe Coll, and James Harwood. Biological control of cereal aphids in wheat: Implications of alternative foods and intraguild predation. United States Department of Agriculture, October 2014. http://dx.doi.org/10.32747/2014.7699858.bard.
Full textAbstract:
The overall objective of this proposal is to understand how realistic strategies for incorporating alternative foods into wheat fields affect the intraguild (IG) interactions of omnivorous and carnivorous predators and their efficacy as biological control agents. Cereal aphids are a primary pest of wheat throughout much of the world. Naturally occurring predator communities consume large quantities of cereal aphids in wheat, and are partitioned into aphid specialists and omnivores. Within wheat fields, the relative abilities of omnivorous and carnivorous predators to reduce cereal aphids depend heavily on the availability, distribution and type of alternative foods (alternative prey, sugar, and pollen), and on the intensity and direction of IG predation events within this community. A series of eight synergistic experiments, carefully crafted to accomplish objectives while accounting for regional production practices, will be conducted to explore how cover crops (US, where large fields preclude effective use of field margins) and field margins (IS, where cover crops are not feasible) as sources of alternative foods affect the IG interactions of predators and their efficacy as biological control agents. These objectives are: 1. Determine the mechanisms whereby the availability of alternative prey and plant-provided resources affect pest suppression by omnivorous and carnivorous generalist predators; 2. Characterize the intensity of IGP within generalist predator communities of wheat systems and assess the impact of these interactions on cereal aphid predation; and 3. Evaluate how spatial patterns in the availability of non-prey resources and IGP affect predation on cereal aphids by generalist predator communities. To accomplish these goals, novel tools, including molecular and biochemical gut content analysis and geospatial analysis, will be coupled with traditional techniques used to monitor and manipulate insect populations and predator efficacy. Our approach will manipulate key alternative foods and IG prey to determine how these individual interactions contribute to the ability of predators to suppress cereal aphids within systems where cover crop and field margin management strategies are evaluated in production scale plots. Using these strategies, the proposed project will not only provide cost-effective and realistic solutions for pest management issues faced by IS and US producers, but also will provide a better understanding of how spatial dispersion, IG predation, and the availability of alternative foods contribute to biological control by omnivores and carnivores within agroecosystems. By reducing the reliance of wheat producers on insecticides, this proposal will address the BARD priorities of increasing the efficiency of agricultural production and protecting plants against biotic sources of stress in an environmentally friendly and sustainable manner.