subject:(Collective model)

Rice University

1. Zhang, Zhaoyang. Agent-based model for developmental aggregation in Myxococcus xanthus bacteria.

Degree: PhD, Natural Sciences, 2020, Rice University

URL: http://hdl.handle.net/1911/108445

► Collective behavior refers to social processes and events which do not reflect existing social structure (laws, conventions, and institutions), but which emerge in a”spontaneous” way.… (more)

▼ Collective behavior refers to social processes and events which do not reflect existing social structure (laws, conventions, and institutions), but which emerge in a”spontaneous” way. It is a common phenomenon in microbiology: a group of cells can spontaneously form different structures under different conditions. How cells interact with each other and achieve this kind of coordinated cell movement is of active scientific interest. As a model organism for bacterial collective behavior,Myxococcus xanthus is widely studied to uncover the mechanism behind bacterial collective behavior. In this work, we applied agent-based models to study the aggregation behavior of M. xanthus cells under starvation and the important cell behaviors for csgA and pilC mutants aggregation.Experiments have shown that WT M. xanthus cells perform a biased walk to-wards aggregation center and this biased walk helps aggregation. To uncover the mechanism of the biased walk, we first developed a model where each cell is modeled as an agent, represented by a point-particle and characterized by its position and moving direction. At low agent density, the model recapitulates the dynamic pat-terns observed by experiments and a previous biophysical model. At high cell density,we extended the model based on the experimental data of the biased movement to-wards aggregates. We tested two possible mechanisms for this biased movement and demonstrate that a chemotax is model with adaptation can reproduce the observed experimental results leading to the formation of stable aggregates. Furthermore, our model reproduces the experimentally observed patterns of cell alignment around aggregates. Next, we applied a data-driven agent-based model to investigate what cell behaviors are important for the rescue of aggregation in two mutants: csgA and pilC, which cannot aggregate unless mixed with wild type (WT) cells. We discovered that when mixed with WT cells, both mutants show biased movements and reduced motility inside aggregates. These behaviors are shown to be important to aggregation in our agent-based simulations. However, some mutant behaviors remain different from WT cells demonstrating that perfect recreation of WT behavior is unnecessary.This work proposes a possible mechanism of the aggregation of M. xanthus bacteria and has shown that some cell behaviors are more important than others in aggregation. Our agent-based model provides a general framework that can be used to study self-organization behaviors in other n other surface motile bacteria Advisors/Committee Members: Igoshin, Oleg (advisor), Onuchic, Jose (advisor).

Subjects/Keywords: Agent-based model; collective behavior

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APA (6^th Edition):

Zhang, Z. (2020). Agent-based model for developmental aggregation in Myxococcus xanthus bacteria. (Doctoral Dissertation). Rice University. Retrieved from http://hdl.handle.net/1911/108445

Chicago Manual of Style (16^th Edition):

Zhang, Zhaoyang. “Agent-based model for developmental aggregation in Myxococcus xanthus bacteria.” 2020. Doctoral Dissertation, Rice University. Accessed March 07, 2021. http://hdl.handle.net/1911/108445.

MLA Handbook (7^th Edition):

Zhang, Zhaoyang. “Agent-based model for developmental aggregation in Myxococcus xanthus bacteria.” 2020. Web. 07 Mar 2021.

Vancouver:

Zhang Z. Agent-based model for developmental aggregation in Myxococcus xanthus bacteria. [Internet] [Doctoral dissertation]. Rice University; 2020. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/1911/108445.

Council of Science Editors:

Zhang Z. Agent-based model for developmental aggregation in Myxococcus xanthus bacteria. [Doctoral Dissertation]. Rice University; 2020. Available from: http://hdl.handle.net/1911/108445

Cornell University

2. Dalziel, Benjamin. The Influence Of Collective Animal Movement On Population Dynamics.

Degree: PhD, Ecology, 2014, Cornell University

URL: http://hdl.handle.net/1813/37026

► Many populations exhibit collective behavior, where interactions among nearby individuals scale up to cause emergent patterns in the behavior of groups, as in the coordinated… (more)

▼ Many populations exhibit collective behavior, where interactions among nearby individuals scale up to cause emergent patterns in the behavior of groups, as in the coordinated movement of a flock of birds or a school of fish. Populations influenced by collective behavior violate the assumption of mass action that underlies most ecological models, in which individuals are viewed as statistically independent. However, the ecological significance of collective behavior is not well understood, because studies have been limited to populations where high throughput ethological data is available, such as in the laboratory or in computer simulations. This dissertation tests for the signal of collective behavior in ecological data-data on the distribution patterns of organisms collected on a coarser spatial and temporal scale than the underlying processes-and examines the influence of collective behavior on population dynamics. Data on the locations of migratory caribou (collected every five days by satellite tracking collars) are shown to be generated by two distinct processes. The first process creates broad-scale spatiotemporal order in movement patterns, and is likely driven by seasonally and spatially fluctuating environmental and physiological cues. The second process creates finer-scale order that is likely due to behavioral interactions among nearby individuals. The strength of alignment in the velocities of nearby individuals varies systematically with time of year, suggesting that collective behavior can be a dynamic property of migratory populations. The dissertation then considers collective mobility patterns in humans, analyzing census data on the commuting patterns of workers in Canadian cities. The level of order in commuting patterns varies systematically among cities. In particular, in some cities a disproportionate number of workers travel to work in a few focal locations. Simulations of the spread of a respiratory infection in each city predict differences among cities in the risk of an epidemic, due to systematic variation in the level of order in the commuting patterns of workers. In particular, larger cities tend to be more highly organized and, as a result, have a disproportionately higher probability of sparking an epidemic. The dissertation then explores the role of large cities in supporting the emergence of a new strain of influenza in dogs. The analysis combines demographic data on animal shelters in the United States, molecular data from the pathogen and seroprevalence estimates from the literature to show that large animal shelters in major metropolitan areas function as endemic reservoirs for the virus, facilitating sporadic outbreaks in the wider population. In sum the dissertation research shows that collective behavior can sometimes be detected and characterized in ecological data without recourse to fine-scale behavioral observations, and that collective behavior can significantly alter population dynamics at broad spatial and temporal scales. Advisors/Committee Members: Ellner, Stephen Paul (chair), Parrish, Colin Ross (committee member), Hooker, Giles J. (committee member), Geber, Monica Ann (committee member).

Subjects/Keywords: collective behavior; population dynamics; epidemic model

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Dalziel, B. (2014). The Influence Of Collective Animal Movement On Population Dynamics. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/37026

Chicago Manual of Style (16^th Edition):

Dalziel, Benjamin. “The Influence Of Collective Animal Movement On Population Dynamics.” 2014. Doctoral Dissertation, Cornell University. Accessed March 07, 2021. http://hdl.handle.net/1813/37026.

MLA Handbook (7^th Edition):

Dalziel, Benjamin. “The Influence Of Collective Animal Movement On Population Dynamics.” 2014. Web. 07 Mar 2021.

Vancouver:

Dalziel B. The Influence Of Collective Animal Movement On Population Dynamics. [Internet] [Doctoral dissertation]. Cornell University; 2014. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/1813/37026.

Council of Science Editors:

Dalziel B. The Influence Of Collective Animal Movement On Population Dynamics. [Doctoral Dissertation]. Cornell University; 2014. Available from: http://hdl.handle.net/1813/37026

Technical University of Lisbon

3. Pechena, Iryna. Partilha de rendimento e decisões intra-familiares em Portugal : o caso das decisões de pedidos de empréstimo.

Degree: 2013, Technical University of Lisbon

URL: http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/11359

►

Mestrado em Finanças

A situação económica e financeira de Portugal e o aumento de endividamento das famílias motiva a realização de estudo sobre a gestão… (more)

▼

Mestrado em Finanças

A situação económica e financeira de Portugal e o aumento de endividamento das famílias motiva a realização de estudo sobre a gestão das finanças das famílias e sobre o processo da tomada de decisões financeiras. Esta investigação centra-se na investigação da evidência empírica da prática de partilha comum dos rendimentos (Income Pooling) pelos casais portugueses e na forma como tomam a decisão de contrair um empréstimo (partilham ou são autonomia). As bases de dados utilizadas: o recentemente disponibilizado Módulo - Partilha de Recursos no Seio do Agregado Doméstico Privado do Inquérito às Condições de Vida e Rendimentos (ICOR), pela primeira vez realizado pelo Instituto Nacional de Estatística (INE) e Eurostat. A amostra é composta por 1.440 casais e a unidade de observação é o indivíduo (N=2.880) numa amostra representativa dos residentes em Portugal, maiores de 16 anos e vivendo em casal com ou sem filhos. Foram construídos três modelos Probit: i) income pooling; ii) a partilha na decisão de contrair um empréstimo; e iii) a autonomia na decisão de contrair um empréstimo. Os resultados indicam que não há evidência empírica da prática de Income Pooling e que o Modelo Unitário não é adequado como representando o comportamento dos casais portugueses. Existem evidências de que a decisão financeira em questão é tomada sem passar pelo processo de negociação. E que este processo não é adequado aos pressupostos do Modelo Coletivo mas sim, é do tipo de Parceria Igualitária, sem estarem definidas as áreas de responsabilidade de cada parceiro consoante o género.

The economic and financial situation of Portugal and the increase of excessive debt owned by families lead to development of studies about the families? financial management and about the financial decision making process. This investigation focus on the Income Pooling by Portuguese household members and on the decision about borrowing making process, if the decision is shared or autonomous. The databases used are: the recently provided Module on Intra-Household Sharing of Resources of European Union Statistics on Income and Living Conditions (EU-SILC), made available by the first time by Statistics Portugal (INE) and Eurostat. The final selected sample comprises 1.440 couples, the unit of observation is the individual (N=2.880) resident in Portugal, over 16 years old. Three Probit models were built: i) the Income Pooling; ii) the share of the decision about borrowing; and iii) the autonomy of the decision about borrowing. The results show that there is no evidence of Income Pooling practice and that the Unitary Model is not adequate for representing Portuguese couples? behavior. The results also suggest that the financial decision (borrowing) is made without a previous negotiation process. This process is not adequate for the assumptions of Collective Model, but it is more likely to be an Egalitarian Partnership Model, where the definition of responsibility areas of each partner according to the gender, does not exist.

Advisors/Committee Members: Fontainha, Elsa.

Subjects/Keywords: Income pooling; modelo unitário; modelo coletivo; unitary model; collective model

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APA (6^th Edition):

Pechena, I. (2013). Partilha de rendimento e decisões intra-familiares em Portugal : o caso das decisões de pedidos de empréstimo. (Thesis). Technical University of Lisbon. Retrieved from http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/11359

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Pechena, Iryna. “Partilha de rendimento e decisões intra-familiares em Portugal : o caso das decisões de pedidos de empréstimo.” 2013. Thesis, Technical University of Lisbon. Accessed March 07, 2021. http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/11359.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Pechena, Iryna. “Partilha de rendimento e decisões intra-familiares em Portugal : o caso das decisões de pedidos de empréstimo.” 2013. Web. 07 Mar 2021.

Vancouver:

Pechena I. Partilha de rendimento e decisões intra-familiares em Portugal : o caso das decisões de pedidos de empréstimo. [Internet] [Thesis]. Technical University of Lisbon; 2013. [cited 2021 Mar 07]. Available from: http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/11359.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Pechena I. Partilha de rendimento e decisões intra-familiares em Portugal : o caso das decisões de pedidos de empréstimo. [Thesis]. Technical University of Lisbon; 2013. Available from: http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/11359

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Alberta

4. Zmurchok, Cole MJ. Direction-Dependent Communication Mechanisms in Individual-Based Models of Collective Behaviour.

Degree: MS, Department of Mathematical and Statistical Sciences, 2014, University of Alberta

URL: https://era.library.ualberta.ca/files/kh04dq14x

► In this thesis, we study direction-dependent communication mechanisms in individual-based models (IBMs) of collective behaviour. Previously, direction-dependent communication mechanism were incorporated into a non-local hyperbolic… (more)

▼ In this thesis, we study direction-dependent communication mechanisms in individual-based models (IBMs) of collective behaviour. Previously, direction-dependent communication mechanism were incorporated into a non-local hyperbolic PDE model for collective behaviour. The PDE model exhibits numerous spatial patterns observed in nature by considering a variety of communication mechanisms. Like the PDE model, the IBM is formulated in terms of three social interaction forces: repulsion, alignment, and attraction, and the IBM includes information regarding conspecifics' direction of travel. We find that the IBM produces a variety of spatial patterns such as stationary groups, traveling groups, zigzagging aggregations, feathers, and ripple-like patterns, matching the rich behaviour of the PDE model. We also investigate the effect of incorporating density-dependent speed. We find that if individuals slow and speed in response to conspecifics, group splitting and group merging patterns arise. While the PDE model allows for the effect of direction-dependent communication mechanisms on collective behaviour to be seen at the population density level, the IBM model reveals how individuals move within these spatial patterns. To complete the study of direction-dependent communication mechanisms, 2-particle models are proposed as a framework for understanding how individuals respond to their neighbours. The foundation for this work is the anti-symmetric exclusion process that describes the movement of two particles on a infinite one-dimensional lattice when the particles exclude each other from space yet and have an anti-symmetric movement bias. We incorporate non-local repulsion and attraction interactions in the anti-symmetric exclusion process, and study this model by developing a master equation. Stochastic simulations reveal that non-local repulsion and attraction interactions result in group behaviour, with a finite mean separation distance. We also consider alignment interactions by considering the position and direction of travel of the particles, and develop a master equation for this process. Moving groups result from the inclusion of alignment interactions. We find that the 2-particle model framework reveals inter-individual behaviour that is characteristic of group patterns and provides a foundation for analytical work. Studying direction-dependent communication with these three perspectives (PDE, IBM, and 2-particle model) reinforces the important role that direction-dependent communication mechanisms have in producing the complex spatial patterns in nature.

Subjects/Keywords: Individual-based model; Animal Communication; Pattern formation; Collective behaviour

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APA (6^th Edition):

Zmurchok, C. M. (2014). Direction-Dependent Communication Mechanisms in Individual-Based Models of Collective Behaviour. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/kh04dq14x

Chicago Manual of Style (16^th Edition):

Zmurchok, Cole MJ. “Direction-Dependent Communication Mechanisms in Individual-Based Models of Collective Behaviour.” 2014. Masters Thesis, University of Alberta. Accessed March 07, 2021. https://era.library.ualberta.ca/files/kh04dq14x.

MLA Handbook (7^th Edition):

Zmurchok, Cole MJ. “Direction-Dependent Communication Mechanisms in Individual-Based Models of Collective Behaviour.” 2014. Web. 07 Mar 2021.

Vancouver:

Zmurchok CM. Direction-Dependent Communication Mechanisms in Individual-Based Models of Collective Behaviour. [Internet] [Masters thesis]. University of Alberta; 2014. [cited 2021 Mar 07]. Available from: https://era.library.ualberta.ca/files/kh04dq14x.

Council of Science Editors:

Zmurchok CM. Direction-Dependent Communication Mechanisms in Individual-Based Models of Collective Behaviour. [Masters Thesis]. University of Alberta; 2014. Available from: https://era.library.ualberta.ca/files/kh04dq14x

Boston College

5. Penglase, Jacob. Essays on Family Economics in Developing Countries.

Degree: PhD, Economics, 2018, Boston College

URL: http://dlib.bc.edu/islandora/object/bc-ir:107942

► In this dissertation, I attempt to better understand the inner workings of the household: Do parents favor certain types of children? When do parents decide… (more)

▼ In this dissertation, I attempt to better understand the inner workings of the household: Do parents favor certain types of children? When do parents decide to have their children work? How can we identify inequality within the household? These issues are fundamental to economic development and closely related to individual welfare. However, studying these questions is difficult since the household is in many ways a blackbox to economists; consumption data is typically collected at the household level, and concepts like bargaining power are not observable. My research examines these questions in a variety of different contexts in the developing world. In Chapter 1, I test for consumption inequality between foster and non-foster children in Sub-Saharan Africa. In Chapter 2, I examine the relationship between child labor and fertility in Nigerian households. Lastly, I study the identification of intrahousehold inequality in collective households in Chapter 3. Chapter 1: In “Consumption Inequality Among Children: Evidence from Child Fostering in Malawi", I study how resources are allocated among foster and non- foster children in Malawi. Child fostering is widespread in parts of Africa and the wellbeing of these children, who may be particularly vulnerable to impoverishment, is not well known. However, identifying individual-level consumption is difficult, since goods are shared and consumption is measured at the household level. Recent work on intrahousehold resource allocation has inferred child consumption from household- level spending on child-specific goods (e.g., child clothing). This literature is often dependent on the existence of goods in the data that are consumed exclusively by a particular type of person in the household. These studies are therefore limited by the level of assignability of goods within the consumption survey. Stated differently, to identify inequality between foster and non-foster children using existing techniques, I would need to observe expenditure on a good that is consumed separately by foster and non-foster children. Because I do not, I develop a new methodology using the collective framework to measure consumption inequality between foster and non-foster children. I find little evidence of inequality between foster and non-foster children. I then divide foster children by whether the child is orphaned, and I find that orphan-foster child consumption is 23 percent less than non-orphan foster child consumption. The results of this paper suggest that policymakers should design programs to improve the relative standing of orphan-foster children in the household. The methodological contribution of this paper is applicable to other contexts as intrahousehold inequality among children is widespread. Chapter 2: In “Child Labor Laws and Household Fertility Decision: Evidence from Nigeria" I study the Child Rights Act of Nigeria (CRA). In 2003, the Nigerian National Assembly implemented this law, which codified existing child labor standards and dramatically increased the penalties for… Advisors/Committee Members: Arthur Lewbel (Thesis advisor), S Anukriti (Thesis advisor).

Subjects/Keywords: Collective Model; Development Economics; Foster Children; Household Economics

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Penglase, J. (2018). Essays on Family Economics in Developing Countries. (Doctoral Dissertation). Boston College. Retrieved from http://dlib.bc.edu/islandora/object/bc-ir:107942

Chicago Manual of Style (16^th Edition):

Penglase, Jacob. “Essays on Family Economics in Developing Countries.” 2018. Doctoral Dissertation, Boston College. Accessed March 07, 2021. http://dlib.bc.edu/islandora/object/bc-ir:107942.

MLA Handbook (7^th Edition):

Penglase, Jacob. “Essays on Family Economics in Developing Countries.” 2018. Web. 07 Mar 2021.

Vancouver:

Penglase J. Essays on Family Economics in Developing Countries. [Internet] [Doctoral dissertation]. Boston College; 2018. [cited 2021 Mar 07]. Available from: http://dlib.bc.edu/islandora/object/bc-ir:107942.

Council of Science Editors:

Penglase J. Essays on Family Economics in Developing Countries. [Doctoral Dissertation]. Boston College; 2018. Available from: http://dlib.bc.edu/islandora/object/bc-ir:107942

University of Georgia

6. Fullilove, Brian James. A review of ruin probability models.

Degree: 2014, University of Georgia

URL: http://hdl.handle.net/10724/26049

► The probability that an insurance company can go bankrupt is a crucial quantity to be able to calculate. There are many ways to calculate such… (more)

Subjects/Keywords: Ruin Probability; Collective Risk Theory; Random Walk; Compound Poisson Model

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Fullilove, B. J. (2014). A review of ruin probability models. (Thesis). University of Georgia. Retrieved from http://hdl.handle.net/10724/26049

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Fullilove, Brian James. “A review of ruin probability models.” 2014. Thesis, University of Georgia. Accessed March 07, 2021. http://hdl.handle.net/10724/26049.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Fullilove, Brian James. “A review of ruin probability models.” 2014. Web. 07 Mar 2021.

Vancouver:

Fullilove BJ. A review of ruin probability models. [Internet] [Thesis]. University of Georgia; 2014. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10724/26049.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Fullilove BJ. A review of ruin probability models. [Thesis]. University of Georgia; 2014. Available from: http://hdl.handle.net/10724/26049

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

7. Ferkane, Ylias. L'accord collectif du travail : étude sur la diffusion d'un modele : The labour collective agreement : a study on a disseminating model.

Degree: Docteur es, Droit privé, 2015, Université Paris X – Nanterre

URL: http://www.theses.fr/2015PA100173

►

L’accord collectif de travail constitue un instrument remarquable de notre droit. Les difficultés qui entourent sa qualification depuis l’origine attestent du bouleversement qu’a entraîné une… (more)

▼

L’accord collectif de travail constitue un instrument remarquable de notre droit. Les difficultés qui entourent sa qualification depuis l’origine attestent du bouleversement qu’a entraîné une telle figure dans nos catégories d’analyse classiques. Il se particularise au sein de la catégorie des actes juridique à la fois en tant que modèle de droit négocié et modèle de droit collectif. Ces caractéristiques permettent de l’ériger à la fois au rang de modèle idéel mais également de modèle idéal. En effet, le modèle de l’accord collectif de travail se présente comme un objet que l’on ambitionne d’imiter pour ses vertus fantasmées ou avérées. Il en résulte une diffusion du modèle au-delà du droit du travail. Il est toutefois difficile de tirer les conséquences d’un tel constat sur le plan juridique. Logiquement, l’observation de ce phénomène imitatif devrait permettre, aux termes d’un raisonnement inductif, de dégager un droit commun à l’ensemble des accords collectifs identifiés. Néanmoins, leur diversité est telle que toute unification en la matière est illusoire. Une convergence est cependant possible mais elle s’exprime sur un mode mineur en termes d’harmonisation. Plus encore, il apparaît que la diffusion du modèle de l’accord collectif de travail produit dans un mouvement rétroactif surprenant des effets sur le modèle lui-même.

The labour collective agreement is an original legal instrument. Since its origins, the collective agreement has challenged the classical legal categories. The legal doctrine had difficulties modeling it. Now our days, as a model, the labour collective agreement does distinguish itself in two ways: it is a model for the right to bargain and it is a model for collective rights. Those characteristics erect the labour collective agreement as both “ideel” and “ideal” model. Actually, this model is one to mimic in the name of its alleged qualities. Therefore, the model is disseminated beyond the labour law. Many examples of collective agreements can be found outside the social law, some of which do share great similarities with the labour collective agreements. However, the legal consequences of such similarities are difficult to assess. According to an inductive analysis those mimicries could be the design of a collective agreement’s “common law”. Nevertheless, the collective agreement observed are so diversified that a unification is impossible. A mere convergence can only be identified. Surprisingly, the labour collective agreement’s model dissemination retroacts on the model itself.

Advisors/Committee Members: Rotschild-Souriac, Marie-Armelle (thesis director).

Subjects/Keywords: Accord collectif; Négociation collective; Droit du travail; Modèle; Democratie; Diffusion juridique; Collective agreement; Collective bargaining; Labour law; Model; Democracy; Legal Diffusion; 340

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ferkane, Y. (2015). L'accord collectif du travail : étude sur la diffusion d'un modele : The labour collective agreement : a study on a disseminating model. (Doctoral Dissertation). Université Paris X – Nanterre. Retrieved from http://www.theses.fr/2015PA100173

Chicago Manual of Style (16^th Edition):

Ferkane, Ylias. “L'accord collectif du travail : étude sur la diffusion d'un modele : The labour collective agreement : a study on a disseminating model.” 2015. Doctoral Dissertation, Université Paris X – Nanterre. Accessed March 07, 2021. http://www.theses.fr/2015PA100173.

MLA Handbook (7^th Edition):

Ferkane, Ylias. “L'accord collectif du travail : étude sur la diffusion d'un modele : The labour collective agreement : a study on a disseminating model.” 2015. Web. 07 Mar 2021.

Vancouver:

Ferkane Y. L'accord collectif du travail : étude sur la diffusion d'un modele : The labour collective agreement : a study on a disseminating model. [Internet] [Doctoral dissertation]. Université Paris X – Nanterre; 2015. [cited 2021 Mar 07]. Available from: http://www.theses.fr/2015PA100173.

Council of Science Editors:

Ferkane Y. L'accord collectif du travail : étude sur la diffusion d'un modele : The labour collective agreement : a study on a disseminating model. [Doctoral Dissertation]. Université Paris X – Nanterre; 2015. Available from: http://www.theses.fr/2015PA100173

NSYSU

8. Li, Shang-jen. Narrating the entrepreneuring organization-the case of BS Cultural and Educational Enterprise Group.

Degree: PhD, Business Management, 2011, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0215111-144408

► Abstract This study explores the entrepreneuring organization which presents itself as the organizer of value creation, how to create a sustained momentum in entrepreneuring along… (more)

▼ Abstract This study explores the entrepreneuring organization which presents itself as the organizer of value creation, how to create a sustained momentum in entrepreneuring along its developmental process. Based on the findings from previous study, the so-called entrepreneuring organization is the one which based on its distinguished position in the marketsset and conducted its own innovation and value creation activities. And what refers to entrepreneuring here is to differentiate it from conventional definition concerning entrepreneurship which mainly related to venture creation, it is more about the process where members in such organization conduct innovation and value creation activities. Two major issues are investgated: How sustained momentum in entrepreneuring is emerged along the developmental process; How members conduct innovation and value creation activities collectively. The purpose of this study is to conduct explorative exposition in understanding the process regarding how entrepreneuring organization functions. The narrative inquiry method and the perspective of collective entrepreneurship are applied in proceeding to this study. The âEntrepreneuring process modelâ has been depicted from this study and has sorted out research findings as follows: 1). The entrepreneurial setting is merged from the process of cycleing construction:âemergionâ-âfiltering and selectionâ-âretainingâ, as organization develops. 2). The sustained momentum in entrepreneuring is coming from the interaction among members and entrepreneurial setting which tranfroms individual agency into collective synergy effectively. 3). Three steps are pointed out to transform individual agency into collective synergy: a. The process transforming into collective synergy is activated via the believing in competent individuals who can create entrepreneuring. b. The collective synergy is produced from effective harmonizing between the needs for individuals to proceed to their own development and for organization to function as intergral whole. C. Aggregating individuals as a whole via interplay between calculative and social commitments. Advisors/Committee Members: Daniel Tsai (chair), Jack Wang (chair), Shih-Chieh Fang (chair), Yu-Chung Liu (committee member), Dun-hou Tsai (committee member), Ming-rea Kao, (chair).

Subjects/Keywords: collective entrepreneurship perspective; Narrative inquiry; organization entrepreneurship; Entrepreneuring process model; Entrepreneuring organization

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APA (6^th Edition):

Li, S. (2011). Narrating the entrepreneuring organization-the case of BS Cultural and Educational Enterprise Group. (Doctoral Dissertation). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0215111-144408

Chicago Manual of Style (16^th Edition):

Li, Shang-jen. “Narrating the entrepreneuring organization-the case of BS Cultural and Educational Enterprise Group.” 2011. Doctoral Dissertation, NSYSU. Accessed March 07, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0215111-144408.

MLA Handbook (7^th Edition):

Li, Shang-jen. “Narrating the entrepreneuring organization-the case of BS Cultural and Educational Enterprise Group.” 2011. Web. 07 Mar 2021.

Vancouver:

Li S. Narrating the entrepreneuring organization-the case of BS Cultural and Educational Enterprise Group. [Internet] [Doctoral dissertation]. NSYSU; 2011. [cited 2021 Mar 07]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0215111-144408.

Council of Science Editors:

Li S. Narrating the entrepreneuring organization-the case of BS Cultural and Educational Enterprise Group. [Doctoral Dissertation]. NSYSU; 2011. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0215111-144408

University of California – Berkeley

9. Leslie, Hannah Hogan. Measuring and Modifying Community Social Factors to Reduce Alcohol Use and HIV Risk.

Degree: Epidemiology, 2015, University of California – Berkeley

URL: http://www.escholarship.org/uc/item/39p4z9g6

► This dissertation addresses methodological and substantive questions around the estimation of contextual effects, with a focus on the influence of community factors on alcohol use… (more)

▼ This dissertation addresses methodological and substantive questions around the estimation of contextual effects, with a focus on the influence of community factors on alcohol use in South Africa. Alcohol use contributes to a multitude of health conditions and is a particularly important risk factor for South African men due to heavy consumption and the high risk of alcohol-related harms such as violence and road accidents in this population. In addition, HIV transmission and progression to AIDS may be accelerated by alcohol use. Research into the causes of dangerous alcohol use to date has focused on individual-level factors. This work addresses contextual traits that may relate to alcohol use, particularly community social factors. Specifically, I evaluate analytic methods for the measurement and aggregation of individual perceptions of social factors such as collective efficacy (chapter 2), test the associations of alcohol outlet density and village collective efficacy with young men’s drinking behaviors in rural South Africa (chapter 3), and assess the village-level effect of a randomized community mobilization trial intended to modify gender norms on men’s alcohol use (chapter 4). Measuring social factors that are not directly observed is a key challenge in the estimation of contextual effects. I consider methods for estimating the effect of latent group factors on health outcomes using observed item responses within individuals. I compare approaches where the group-level exposure is calculated as the overall mean of items within persons within groups (aggregation and regression) with latent variable methods, namely item response modeling within individuals and structural equation modeling within groups. In particular, I explore the creation of multiple plausible values for individual perception and the use of these measures in a multilevel structural equation model. Simulation studies across a range of conditions to assess the robustness of these methods suggest that latent variable models reduce bias in the estimation of contextual effects relative to consistent attenuation in approaches based on aggregation and regression. This bias correction incurs additional variability, however. The causal model linking the latent construct to item responses affects appropriate analytic choice, as one setting in which aggregation and regression approaches perform well is when the group latent trait is a composite of individual values (formative indicators) and the sampling fraction is high. Finally, consideration of the role of third variables in affecting measurement, exposure, and outcome suggests that aggregation and regression approaches can be highly prone to bias in these scenarios, with some bias correction possible when adjusting for the aggregate value of a variable that distorts measurement. Latent variable methods provide reasonable bias correction in these situations without control for the aggregate of the third variable; adjustment for the distortion factor in the measurement model did not contribute…

Subjects/Keywords: Epidemiology; Public health; Alcohol use; Collective efficacy; Contextual effects; HIV; Item response model; South Africa

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APA (6^th Edition):

Leslie, H. H. (2015). Measuring and Modifying Community Social Factors to Reduce Alcohol Use and HIV Risk. (Thesis). University of California – Berkeley. Retrieved from http://www.escholarship.org/uc/item/39p4z9g6

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Leslie, Hannah Hogan. “Measuring and Modifying Community Social Factors to Reduce Alcohol Use and HIV Risk.” 2015. Thesis, University of California – Berkeley. Accessed March 07, 2021. http://www.escholarship.org/uc/item/39p4z9g6.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Leslie, Hannah Hogan. “Measuring and Modifying Community Social Factors to Reduce Alcohol Use and HIV Risk.” 2015. Web. 07 Mar 2021.

Vancouver:

Leslie HH. Measuring and Modifying Community Social Factors to Reduce Alcohol Use and HIV Risk. [Internet] [Thesis]. University of California – Berkeley; 2015. [cited 2021 Mar 07]. Available from: http://www.escholarship.org/uc/item/39p4z9g6.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Leslie HH. Measuring and Modifying Community Social Factors to Reduce Alcohol Use and HIV Risk. [Thesis]. University of California – Berkeley; 2015. Available from: http://www.escholarship.org/uc/item/39p4z9g6

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

10. Fernandes, Mauricio Machado. Estimação da oferta de trabalho com modelos coletivos: uma aplicação para o Brasil.

Degree: Mestrado, Economia Aplicada, 2008, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/96/96131/tde-30042008-134510/ ;

►

Esse estudo tem como objetivo investigar o comportamento da oferta de trabalho dos cônjuges brasileiros e verificar o grau de adequação desse em relação a… (more)

▼

Esse estudo tem como objetivo investigar o comportamento da oferta de trabalho dos cônjuges brasileiros e verificar o grau de adequação desse em relação a um modelo específico dentro da abordagem coletiva (\'collective models\'). O modelo coletivo de oferta de trabalho com fatores distributivos oferece uma estrutura teórica para interpretar o processo decisório intra-familiar e seus resultados, as alocações de consumo e oferta de trabalho das famílias, que são Pareto eficientes por hipótese. Fatores distributivos são variáveis que afetam a decisão sobre oferta de trabalho, mas não tem impactos sobre as preferências nem a restrição orçamentária das famílias. As informações relativas à amostra de famílias brasileiras foram obtidas a partir da PNAD e da Estatística de Registros Civis, ambas para o ano de 2004. Os resultados não rejeitam as restrições derivadas do modelo coletivo, tanto em sua forma geral quanto na versão restrita pela imposição de preferências egoístas. Além disso, as variáveis adotadas como fatores distributivos, sex-ratio e \'participação em divórcios\', influenciam, de forma significativa e condizente com a teoria, a oferta de trabalho de maridos e esposas.

This paper has as objective to investigate the Brazilian spousesĺabor supply behavior and to empirically check the adequacy of a specific collective model. The collective labor supply model with distribution factors offers a theoretical structure to interpret the intra-household decision process and its results, the familiesćhoices of consumption and labor supply, who are Pareto efficient. Distribution factors are variables that affect the labor supply decision, but do not have impacts on the preference relations nor the budget constraint of the families. The sample of Brazilian families had been gotten from the \"PNADänd \"Estatística de Registros Civis\", for the year of 2004. The results do not reject the restrictions derived from the collective model, neither in its general form nor in the egoisti preferences form. Moreover, distribution factors, sex-ratio and \'participação em divórcios\', are found to affect labor supply of husbands and wives in the directions predicted by the theory and to be statistically significant.

Advisors/Committee Members: Scorzafave, Luiz Guilherme Dacar da Silva.

Subjects/Keywords: Alocações intrafamiliar eficientes; Collective model; Efficient intrahousehold allocations; Labor supply; Modelo coletivo; Oferta de trabalho

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APA (6^th Edition):

Fernandes, M. M. (2008). Estimação da oferta de trabalho com modelos coletivos: uma aplicação para o Brasil. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/96/96131/tde-30042008-134510/ ;

Chicago Manual of Style (16^th Edition):

Fernandes, Mauricio Machado. “Estimação da oferta de trabalho com modelos coletivos: uma aplicação para o Brasil.” 2008. Masters Thesis, University of São Paulo. Accessed March 07, 2021. http://www.teses.usp.br/teses/disponiveis/96/96131/tde-30042008-134510/ ;.

MLA Handbook (7^th Edition):

Fernandes, Mauricio Machado. “Estimação da oferta de trabalho com modelos coletivos: uma aplicação para o Brasil.” 2008. Web. 07 Mar 2021.

Vancouver:

Fernandes MM. Estimação da oferta de trabalho com modelos coletivos: uma aplicação para o Brasil. [Internet] [Masters thesis]. University of São Paulo; 2008. [cited 2021 Mar 07]. Available from: http://www.teses.usp.br/teses/disponiveis/96/96131/tde-30042008-134510/ ;.

Council of Science Editors:

Fernandes MM. Estimação da oferta de trabalho com modelos coletivos: uma aplicação para o Brasil. [Masters Thesis]. University of São Paulo; 2008. Available from: http://www.teses.usp.br/teses/disponiveis/96/96131/tde-30042008-134510/ ;

University of California – San Diego

11. Pornpatcharapong, Wasut. Understanding chemical reactions through the theoretical lenses: Markov State Model and Gaussian Process Regression for an identification of reaction coordinates and computation of multidimensional free energy surfaces.

Degree: Chemistry, 2018, University of California – San Diego

URL: http://www.escholarship.org/uc/item/59b7x6hs

► Understanding a proper reaction coordinate and the free energy profile of any chemical reaction provide valuable information in elucidating the kinetics and thermodynamics properties, as… (more)

▼ Understanding a proper reaction coordinate and the free energy profile of any chemical reaction provide valuable information in elucidating the kinetics and thermodynamics properties, as well as the underlying reaction mechanisms. Nevertheless, identifying a proper reaction coordinate for a specific chemical reaction or computing the free energy landscape are difficult. Hence, any methods that could systematically provide insights into both issues would play important roles in studies of any kind of chemical reactions.On the reaction coordinate’s front, Markov State Model (MSM) is a tool that can be used to identify the reaction coordinate of the slowest motion in a simulation. Instead of the deterministic view of the MD simulations, MSM takes a probabilistic view that a configuration has a probability to evolve to another configuration after time t defined by a transfer operator, which allows us to identify each motion in the system in terms of the information encapsulated in each of the operator’s corresponding eigenfunctions and eigenvalues. The eigenfunctions of the transfer operator can then be projected onto the collective variable space, and minimal representation of each eigenfunction in the collective variable space could be obtained.On the free energy front, efficient multidimensional free energy landscape can be reconstructed smoothly from noisy free energy estimators through Gaussian Process Regression (GPR). In this dissertation, we proposed a rigorous GPR workflow that also ensures the consistency through projection of the multidimensional landscape into each individual one-dimensional surface with errors bounded by Eigenvector Method for Umbrella Sampling (EMUS). We showed that a significant efficiency gain can be obtained through our scheme.This dissertation employed both MSM and GPR to study the dynamics of cation – anion association in aqueous solutions using LiCl and NaCl as a model. With MSM, we have completely identified all significant motions in the association process and in the bulk, and we also identify important contributions to the slowest process of the dynamics. With GPR, we have achieved a smooth reconstruction of a free energy landscape of both systems using 2 collective variables and large efficiency gain relative to traditional two-dimensional windowed simulation.

Subjects/Keywords: Chemistry; Collective Variables; Free Energy; Machine Learning; Markov State Model; Reaction Coordinate; Solution

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APA (6^th Edition):

Pornpatcharapong, W. (2018). Understanding chemical reactions through the theoretical lenses: Markov State Model and Gaussian Process Regression for an identification of reaction coordinates and computation of multidimensional free energy surfaces. (Thesis). University of California – San Diego. Retrieved from http://www.escholarship.org/uc/item/59b7x6hs

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Pornpatcharapong, Wasut. “Understanding chemical reactions through the theoretical lenses: Markov State Model and Gaussian Process Regression for an identification of reaction coordinates and computation of multidimensional free energy surfaces.” 2018. Thesis, University of California – San Diego. Accessed March 07, 2021. http://www.escholarship.org/uc/item/59b7x6hs.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Pornpatcharapong, Wasut. “Understanding chemical reactions through the theoretical lenses: Markov State Model and Gaussian Process Regression for an identification of reaction coordinates and computation of multidimensional free energy surfaces.” 2018. Web. 07 Mar 2021.

Vancouver:

Pornpatcharapong W. Understanding chemical reactions through the theoretical lenses: Markov State Model and Gaussian Process Regression for an identification of reaction coordinates and computation of multidimensional free energy surfaces. [Internet] [Thesis]. University of California – San Diego; 2018. [cited 2021 Mar 07]. Available from: http://www.escholarship.org/uc/item/59b7x6hs.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Pornpatcharapong W. Understanding chemical reactions through the theoretical lenses: Markov State Model and Gaussian Process Regression for an identification of reaction coordinates and computation of multidimensional free energy surfaces. [Thesis]. University of California – San Diego; 2018. Available from: http://www.escholarship.org/uc/item/59b7x6hs

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Guelph

12. Jigmeddorj, Badamsambuu. Nuclear Structure Study of Cd-110 through Internal Conversion Electrons.

Degree: MS, Department of Physics, 2012, University of Guelph

URL: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/3873

► For many years, Cd-110 has been considered the classic example of a vibrational nucleus within both the Collective Model and the Interacting Boson Model (IBM).… (more)

Subjects/Keywords: Collective model; Cd-110; phonon states; E0-transition; Conversion electron; Conversion coefficient

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APA (6^th Edition):

Jigmeddorj, B. (2012). Nuclear Structure Study of Cd-110 through Internal Conversion Electrons. (Masters Thesis). University of Guelph. Retrieved from https://atrium.lib.uoguelph.ca/xmlui/handle/10214/3873

Chicago Manual of Style (16^th Edition):

Jigmeddorj, Badamsambuu. “Nuclear Structure Study of Cd-110 through Internal Conversion Electrons.” 2012. Masters Thesis, University of Guelph. Accessed March 07, 2021. https://atrium.lib.uoguelph.ca/xmlui/handle/10214/3873.

MLA Handbook (7^th Edition):

Jigmeddorj, Badamsambuu. “Nuclear Structure Study of Cd-110 through Internal Conversion Electrons.” 2012. Web. 07 Mar 2021.

Vancouver:

Jigmeddorj B. Nuclear Structure Study of Cd-110 through Internal Conversion Electrons. [Internet] [Masters thesis]. University of Guelph; 2012. [cited 2021 Mar 07]. Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/3873.

Council of Science Editors:

Jigmeddorj B. Nuclear Structure Study of Cd-110 through Internal Conversion Electrons. [Masters Thesis]. University of Guelph; 2012. Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/3873

University of South Africa

13. Masoga, Liziwe. The role of personality and organisational climate in employee turnover .

Degree: 2013, University of South Africa

URL: http://hdl.handle.net/10500/8846

► Research on employee turnover dates back many decades. However, this research traditionally focused on either understanding turnover intentions or the factors preceding turnover, such as… (more)

▼ Research on employee turnover dates back many decades. However, this research traditionally focused on either understanding turnover intentions or the factors preceding turnover, such as job satisfaction. Despite the challenge in SA being huge and organisations struggling to keep their talent, the research on employee turnover is quite limited. Understanding the different variables that influence employee turnover and providing practical solutions on how to mitigate turnover would be valuable to many organisations. The aim of this research project was to understand the role of personality and organisational climate in employee turnover. In addition, a comprehensive model of employee turnover was developed and tested. The Five Factor Model was used to conceptualise personality, while (due to the limited nature of existing models) a new model was designed to conceptualise organisational climate. A sample of 1 536 people was drawn from a large retail organisation in SA, with 807 stayers and 729 leavers. Biographical, personality and organisational climate information was collected over a two-year period for both samples. Results of the study were mixed; there were no significant differences in the two samples regarding the big five personality factors, except when nine bipolar scales were used. On these scales, leavers were found to be more assertive, persuasive and optimistic than stayers. All five personality factors moderated HR policies & procedures in determining turnover. There were differences between the stayers and leavers samples with regard to age, gender, tenure and absenteeism. Organisational climate was a key determinant of whether people left or stayed and organisations had more than one climate. Personality, organisational climate and absenteeism accounted for 29% of turnover. The proposed model of employee turnover met most of the requirements of goof fit measures when using Structural Equation Modelling (SEM). Advisors/Committee Members: De Beer, Marié (advisor).

Subjects/Keywords: Personality testing; Five factor model; Organisational climate; Collective climates; Absenteeism; Functional turnover; Dysfunctional turnover

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APA (6^th Edition):

Masoga, L. (2013). The role of personality and organisational climate in employee turnover . (Doctoral Dissertation). University of South Africa. Retrieved from http://hdl.handle.net/10500/8846

Chicago Manual of Style (16^th Edition):

Masoga, Liziwe. “The role of personality and organisational climate in employee turnover .” 2013. Doctoral Dissertation, University of South Africa. Accessed March 07, 2021. http://hdl.handle.net/10500/8846.

MLA Handbook (7^th Edition):

Masoga, Liziwe. “The role of personality and organisational climate in employee turnover .” 2013. Web. 07 Mar 2021.

Vancouver:

Masoga L. The role of personality and organisational climate in employee turnover . [Internet] [Doctoral dissertation]. University of South Africa; 2013. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10500/8846.

Council of Science Editors:

Masoga L. The role of personality and organisational climate in employee turnover . [Doctoral Dissertation]. University of South Africa; 2013. Available from: http://hdl.handle.net/10500/8846

University of Manitoba

14. Fraser, Ley D. The effect of cultural identity priming on bicultural Canadians’ political solidarity.

Degree: Psychology, 2018, University of Manitoba

URL: http://hdl.handle.net/1993/33379

► People who perceive their identity in-group as victimized are more likely to show political solidarity for victimized out-groups (Craig & Richeson, 2012). An increasing number… (more)

Subjects/Keywords: Common in-group identity model; Cultural Identity; Bicultural; Political solidarity; Victimhood; Collective victimhood; Intergroup relations

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APA (6^th Edition):

Fraser, L. D. (2018). The effect of cultural identity priming on bicultural Canadians’ political solidarity. (Masters Thesis). University of Manitoba. Retrieved from http://hdl.handle.net/1993/33379

Chicago Manual of Style (16^th Edition):

Fraser, Ley D. “The effect of cultural identity priming on bicultural Canadians’ political solidarity.” 2018. Masters Thesis, University of Manitoba. Accessed March 07, 2021. http://hdl.handle.net/1993/33379.

MLA Handbook (7^th Edition):

Fraser, Ley D. “The effect of cultural identity priming on bicultural Canadians’ political solidarity.” 2018. Web. 07 Mar 2021.

Vancouver:

Fraser LD. The effect of cultural identity priming on bicultural Canadians’ political solidarity. [Internet] [Masters thesis]. University of Manitoba; 2018. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/1993/33379.

Council of Science Editors:

Fraser LD. The effect of cultural identity priming on bicultural Canadians’ political solidarity. [Masters Thesis]. University of Manitoba; 2018. Available from: http://hdl.handle.net/1993/33379

University of Illinois – Chicago

15. Zhao, Jieling. Dynamic Cell Model with Cellular Signaling Network and Mechanical Forces for Tissue Pattern Formation.

Degree: 2016, University of Illinois – Chicago

URL: http://hdl.handle.net/10027/21537

► Cells are the basic functional elements of living bodies. Cell-cell and cell-environment interactions largely maintain and regulate the processes of tissue formation and tissue regeneration,… (more)

▼ Cells are the basic functional elements of living bodies. Cell-cell and cell-environment interactions largely maintain and regulate the processes of tissue formation and tissue regeneration, which involve collective cell migration and proliferation at large scale. Understanding the mechanisms behind cellular physiological processes such as embryo development, wound healing, and tumor metastasis requires study of cell-cell and cell-environment interactions, and their effects on cellular behaviors. As many underlying subcellular processes such as the generation of physical forces by cytoskeleton and transmitted mechanical forces through intercellular adhesion are difficult to access through direct experiments, computational cell model is useful for gaining insight into the mechanisms of cellular processes and aid in design of further investigations. A number of computational cell models have been developed to study cellular processes. However, all have limitations. They either lack accurate descriptions of cell shapes or cell mechanics, or have limited flexibility in modeling cell movements. These limitations prevent effective modeling of dynamic changes in cell shapes and mechanics in biological processes involving large scale cell migration. Here I develop a novel computational cell model called dyCelFEM. It accounts for detailed changes in cellular shapes and mechanics of individual cells in a large population of interacting cells. In addition, it can model the full range of cell motions, from free movement of individual cells to large scale collective cell migration. Furthermore, the transmission of mechanical forces via intercellular adhesion and its rupture is also modeled. With the intercellular protein signaling networks embedded in individual cells, biochemical control of cell behaviors can also be modeled. The dyCelFEM model is then employed to study two cellular processes, namely, the wound healing and cell movement on ECM. Wound healing is a complex process to repair the injured tissue through the communication and collaboration of multiple different types of cells and multiple growth factors and cytokines. Due to its complexity, the underlying cellular mechanisms, such as how the large scale collective cell motions during wound healing are regulated by different type of signals, are still not fully understood. Here I studied the effects of both biochemical and mechanical cues in regulating human skin wound healing and explored their roles in determining the tissue patterns. The cell movement under the effect of cell-ECM interaction is a process of environment sensing of living cell through cellular interaction. In the past decade, it has been found that cell behaves in response to a variety of physical cues from environment through the cell-ECM adhesions. Here I studied the specific role of the ECM geometry on regulating cell elongation and directing cell migration. The overall findings from this study establishes quantitative biological relevance of biochemical and mechanical effects on wound healing and… Advisors/Committee Members: Liang, Jie (advisor), Thomas, Royston (committee member), DiPietro, Luisa A (committee member), Ma, Ao (committee member), Naveed, Hammad (committee member), Liang, Jie (chair).

Subjects/Keywords: Dynamic cellular finite element model Collective cell migration Re-epithelialization Cell-ECM communication

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APA (6^th Edition):

Zhao, J. (2016). Dynamic Cell Model with Cellular Signaling Network and Mechanical Forces for Tissue Pattern Formation. (Thesis). University of Illinois – Chicago. Retrieved from http://hdl.handle.net/10027/21537

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Zhao, Jieling. “Dynamic Cell Model with Cellular Signaling Network and Mechanical Forces for Tissue Pattern Formation.” 2016. Thesis, University of Illinois – Chicago. Accessed March 07, 2021. http://hdl.handle.net/10027/21537.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Zhao, Jieling. “Dynamic Cell Model with Cellular Signaling Network and Mechanical Forces for Tissue Pattern Formation.” 2016. Web. 07 Mar 2021.

Vancouver:

Zhao J. Dynamic Cell Model with Cellular Signaling Network and Mechanical Forces for Tissue Pattern Formation. [Internet] [Thesis]. University of Illinois – Chicago; 2016. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10027/21537.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Zhao J. Dynamic Cell Model with Cellular Signaling Network and Mechanical Forces for Tissue Pattern Formation. [Thesis]. University of Illinois – Chicago; 2016. Available from: http://hdl.handle.net/10027/21537

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

George Mason University

16. Stenhouse, Neil. Powerful Feelings: Extending the Extended Parallel Processing Model to collective action on climate change .

Degree: 2015, George Mason University

URL: http://hdl.handle.net/1920/9851

► The extended parallel processing model (EPPM) is a theory of how individuals’ perceptions of a threat, combined with their perceptions of their own ability to… (more)

▼ The extended parallel processing model (EPPM) is a theory of how individuals’ perceptions of a threat, combined with their perceptions of their own ability to effectively remove the threat, influence their behavioral response (Witte, 1992). Two scholars (Hart & Feldman, 2014) have suggested extending the EPPM to explain responses to the collective threat of climate change. This extension consists of the addition of two efficacy perceptions into the model: perceived likelihood of political action influencing politicians’ actions, and perceived effectiveness of policy in reducing the threat of climate change. In this dissertation, I use survey and experimental data to extend Hart & Feldman’s work by examining two additional forms of efficacy perceptions – participative efficacy and expectations of others’ participation. I also control for a third construct, collective identification with climate advocates. I hypothesized that each of the efficacy beliefs, and perceived threat, would be independently and positively associated with collective action. My results showed that four of the five forms of efficacy beliefs, perceived threat, and collective identification with climate advocates, were each positively associated with at least one measure of political action. Expectation that others would participate in political action was not associated with taking action.. The constructs with the strongest associations with political action were perceived efficacy of government climate policy, and collective identification. The failure of most experimental messages to have significant effects on efficacy and threat perceptions, combined with problems in the way that several variables were measured, mean that strong conclusions about the causal effects of each variable cannot be made. These results do, however, suggest that models of collective action will be strengthened by including a more diverse range of efficacy beliefs. Other implications for theory and practice are discussed. Advisors/Committee Members: Maibach, Edward W (advisor).

Subjects/Keywords: Communication; Political science; Climate change; Climate change; Collective action; Efficacy; Extended Parallel Process Model

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APA (6^th Edition):

Stenhouse, N. (2015). Powerful Feelings: Extending the Extended Parallel Processing Model to collective action on climate change . (Thesis). George Mason University. Retrieved from http://hdl.handle.net/1920/9851

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Stenhouse, Neil. “Powerful Feelings: Extending the Extended Parallel Processing Model to collective action on climate change .” 2015. Thesis, George Mason University. Accessed March 07, 2021. http://hdl.handle.net/1920/9851.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Stenhouse, Neil. “Powerful Feelings: Extending the Extended Parallel Processing Model to collective action on climate change .” 2015. Web. 07 Mar 2021.

Vancouver:

Stenhouse N. Powerful Feelings: Extending the Extended Parallel Processing Model to collective action on climate change . [Internet] [Thesis]. George Mason University; 2015. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/1920/9851.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Stenhouse N. Powerful Feelings: Extending the Extended Parallel Processing Model to collective action on climate change . [Thesis]. George Mason University; 2015. Available from: http://hdl.handle.net/1920/9851

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Arizona State University

17. Jamous, Sara Sami. Modeling Collective Motion of Complex Systems using Agent-Based Models and Macroscopic Models.

Degree: Applied Mathematics, 2019, Arizona State University

URL: http://repository.asu.edu/items/54938

► The main objective of mathematical modeling is to connect mathematics with other scientific fields. Developing predictable models help to understand the behavior of biological systems.… (more)

Subjects/Keywords: Applied mathematics; Agent Based Models; Collective motion; Data-model comparison; Glioma cells; Macroscopic Models; Modeling

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APA (6^th Edition):

Jamous, S. S. (2019). Modeling Collective Motion of Complex Systems using Agent-Based Models and Macroscopic Models. (Doctoral Dissertation). Arizona State University. Retrieved from http://repository.asu.edu/items/54938

Chicago Manual of Style (16^th Edition):

Jamous, Sara Sami. “Modeling Collective Motion of Complex Systems using Agent-Based Models and Macroscopic Models.” 2019. Doctoral Dissertation, Arizona State University. Accessed March 07, 2021. http://repository.asu.edu/items/54938.

MLA Handbook (7^th Edition):

Jamous, Sara Sami. “Modeling Collective Motion of Complex Systems using Agent-Based Models and Macroscopic Models.” 2019. Web. 07 Mar 2021.

Vancouver:

Jamous SS. Modeling Collective Motion of Complex Systems using Agent-Based Models and Macroscopic Models. [Internet] [Doctoral dissertation]. Arizona State University; 2019. [cited 2021 Mar 07]. Available from: http://repository.asu.edu/items/54938.

Council of Science Editors:

Jamous SS. Modeling Collective Motion of Complex Systems using Agent-Based Models and Macroscopic Models. [Doctoral Dissertation]. Arizona State University; 2019. Available from: http://repository.asu.edu/items/54938

18. Deneen, Jeffrey. A catalytic model of collective behavior.

Degree: MS, Natural and Social Sciences, 1980, Texas Woman's University

URL: http://hdl.handle.net/11274/9990

► The purpose of this thesis was to develop a model of collective behavior based on the process of catalysis that would be descriptive as well… (more)

Subjects/Keywords: Social sciences; Collective behavior; Catalytic model

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APA (6^th Edition):

Deneen, J. (1980). A catalytic model of collective behavior. (Masters Thesis). Texas Woman's University. Retrieved from http://hdl.handle.net/11274/9990

Chicago Manual of Style (16^th Edition):

Deneen, Jeffrey. “A catalytic model of collective behavior.” 1980. Masters Thesis, Texas Woman's University. Accessed March 07, 2021. http://hdl.handle.net/11274/9990.

MLA Handbook (7^th Edition):

Deneen, Jeffrey. “A catalytic model of collective behavior.” 1980. Web. 07 Mar 2021.

Vancouver:

Deneen J. A catalytic model of collective behavior. [Internet] [Masters thesis]. Texas Woman's University; 1980. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/11274/9990.

Council of Science Editors:

Deneen J. A catalytic model of collective behavior. [Masters Thesis]. Texas Woman's University; 1980. Available from: http://hdl.handle.net/11274/9990

University of Guelph

19. Elms, Alexandria. Collective Efficacy in Work Teams: How Team Confidence Impacts Team Outcomes.

Degree: MA, Department of Psychology, 2019, University of Guelph

URL: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/17072

► The present study aimed to investigate the relation of collective efficacy and team outcomes, including team performance and team satisfaction. This study also examined team… (more)

Subjects/Keywords: Teamwork; Team Processes; Team Performance; Team Satisfaction; IPO Model; Team Efficacy; Collective Efficacy

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APA (6^th Edition):

Elms, A. (2019). Collective Efficacy in Work Teams: How Team Confidence Impacts Team Outcomes. (Masters Thesis). University of Guelph. Retrieved from https://atrium.lib.uoguelph.ca/xmlui/handle/10214/17072

Chicago Manual of Style (16^th Edition):

Elms, Alexandria. “Collective Efficacy in Work Teams: How Team Confidence Impacts Team Outcomes.” 2019. Masters Thesis, University of Guelph. Accessed March 07, 2021. https://atrium.lib.uoguelph.ca/xmlui/handle/10214/17072.

MLA Handbook (7^th Edition):

Elms, Alexandria. “Collective Efficacy in Work Teams: How Team Confidence Impacts Team Outcomes.” 2019. Web. 07 Mar 2021.

Vancouver:

Elms A. Collective Efficacy in Work Teams: How Team Confidence Impacts Team Outcomes. [Internet] [Masters thesis]. University of Guelph; 2019. [cited 2021 Mar 07]. Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/17072.

Council of Science Editors:

Elms A. Collective Efficacy in Work Teams: How Team Confidence Impacts Team Outcomes. [Masters Thesis]. University of Guelph; 2019. Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/17072

University of Maryland

20. Alvarez, Silvia J. FISSION-FUSION DYNAMICS IN MAMMALS: LINKING ANIMAL MOVEMENT TO GROUP BEHAVIOR.

Degree: Biology, 2016, University of Maryland

URL: http://hdl.handle.net/1903/19269

► Mammals living in groups show temporal variation in spatial cohesion and membership of groups, a behavior known as fission-fusion dynamics (FFD). Changes in cohesion depend… (more)

▼ Mammals living in groups show temporal variation in spatial cohesion and membership of groups, a behavior known as fission-fusion dynamics (FFD). Changes in cohesion depend on the movement behavior of individuals, which is influenced by their social environment, among other factors. I aimed to answer two main questions: 1) how do cognitive abilities and environmental factors explain the variation in social systems of mammals with FFD? and 2) how are FFD related to movement behavior? To answer the first question, I built a dataset on social traits of mammals with FFD from published references and used multivariate analysis to uncover the patterns of variation in social systems. Variation resulted mostly from differences in group and subgroup sizes, and differences in social traits evidenced the presence of discrete categories of social organization that might represent distinct strategies of FFD. To assess the effects of brain size and resource availability on social traits, I used generalized estimating equations as a phylogenetic comparative method. Brain size affected most social traits in marine mammals, supporting predictions of the social brain hypothesis. Resource availability was poorly correlated with social traits in all terrestrial mammals, but it had different effects for herbivores and carnivores, suggesting that environmental constraints acting on FFD differ between trophic levels. To answer the second question, I assessed the predictive power of several movement metrics characterizing tracks of orangutans on FFD, using generalized boosted regressions. Tortuosity, speed, and the number of behaviors were strong predictors of group presence and size, while temporal changes in movement behavior were correlated with changes in cohesion. These findings highlight the potential use of individual movement data to predict aspects of FFD. Lastly, I used an agent-based model to explore the influence of different levels of specificity in recognition on grouping behaviors. Model results suggest that basic social behavioral rules influence FFD, and that more complex group dynamics, such as hierarchical group structures, only emerge in scenarios with high levels of recognition specificity. Overall, the model suggests that recognition abilities, which likely correlate with cognitive skills, may play an important role in the evolution of social systems. Advisors/Committee Members: Fagan, William F (advisor).

Subjects/Keywords: Biology; Ecology; Agent-based model; Animal movement; Collective behavior; Group dynamics; Social Brain Hypothesis

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APA (6^th Edition):

Alvarez, S. J. (2016). FISSION-FUSION DYNAMICS IN MAMMALS: LINKING ANIMAL MOVEMENT TO GROUP BEHAVIOR. (Thesis). University of Maryland. Retrieved from http://hdl.handle.net/1903/19269

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Alvarez, Silvia J. “FISSION-FUSION DYNAMICS IN MAMMALS: LINKING ANIMAL MOVEMENT TO GROUP BEHAVIOR.” 2016. Thesis, University of Maryland. Accessed March 07, 2021. http://hdl.handle.net/1903/19269.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Alvarez, Silvia J. “FISSION-FUSION DYNAMICS IN MAMMALS: LINKING ANIMAL MOVEMENT TO GROUP BEHAVIOR.” 2016. Web. 07 Mar 2021.

Vancouver:

Alvarez SJ. FISSION-FUSION DYNAMICS IN MAMMALS: LINKING ANIMAL MOVEMENT TO GROUP BEHAVIOR. [Internet] [Thesis]. University of Maryland; 2016. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/1903/19269.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Alvarez SJ. FISSION-FUSION DYNAMICS IN MAMMALS: LINKING ANIMAL MOVEMENT TO GROUP BEHAVIOR. [Thesis]. University of Maryland; 2016. Available from: http://hdl.handle.net/1903/19269

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Leiden University

21. Delft, André van. Modelling collective motion with orientation-based rewards.

Degree: 2020, Leiden University

URL: http://hdl.handle.net/1887/137060

► The recent popularization of machine learning as a new paradigm in computer science provides interesting opportunities for explaining phenomena of collective motion in living systems,… (more)

Subjects/Keywords: Machine Learning; Multi-agent; Reinforcement Learning; Collective Motion; Birds; Orientation-based rewards; Model

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APA (6^th Edition):

Delft, A. v. (2020). Modelling collective motion with orientation-based rewards. (Masters Thesis). Leiden University. Retrieved from http://hdl.handle.net/1887/137060

Chicago Manual of Style (16^th Edition):

Delft, André van. “Modelling collective motion with orientation-based rewards.” 2020. Masters Thesis, Leiden University. Accessed March 07, 2021. http://hdl.handle.net/1887/137060.

MLA Handbook (7^th Edition):

Delft, André van. “Modelling collective motion with orientation-based rewards.” 2020. Web. 07 Mar 2021.

Vancouver:

Delft Av. Modelling collective motion with orientation-based rewards. [Internet] [Masters thesis]. Leiden University; 2020. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/1887/137060.

Council of Science Editors:

Delft Av. Modelling collective motion with orientation-based rewards. [Masters Thesis]. Leiden University; 2020. Available from: http://hdl.handle.net/1887/137060

Virginia Tech

22. Chen, Hengheng. Three Essays on Family Economics and Early Childhood Development.

Degree: PhD, Economics (Science), 2012, Virginia Tech

URL: http://hdl.handle.net/10919/27461

► This dissertation consists of three essays studying the effects of collective household decisions on early childhood development from both empirical and theoretical perspectives. The first… (more)

▼ This dissertation consists of three essays studying the effects of collective household decisions on early childhood development from both empirical and theoretical perspectives. The first chapter outlines the dissertation, by presenting the motivations, methods, conclusions, and policy implications for the entire dissertation. Chapter two examines early childhood development using a collective model with children's cognitive production. We jointly estimate the home input demand with children's cognitive production functions based on a simultaneous equations model. Biases are considered that are caused by the non-random selection of time inputs and possible correlations across inputs and outcomes functions. A direct measure of time inputs relying on children's time diaries from the Child Development Supplement of the Panel Study of Income Dynamics (PSID-CDS) has been constructed. We thereby relax the assumption that there is no difference between parental time spent on children and leisure. Our results show that parental time inputs, especially the active time interacting with children's daily activities, have substantial effects on both children's math and reading test scores. The time inputs vary across parents' age, race, and eduction levels. In chapter three, we conduct a standard Blinder-Oaxaca decomposition to evaluate the role of home inputs in the black-white test score gaps based on the empirical model presented in chapter two. Aside from the finding that children's ability accounts for a large proportion of the differences, we find that home inputs can also explain a significant portion of the gap. When the maternal time is equalized at the average levels of white children, the racial differences in children's reading and math test scores can be closed by approximately 30%-50%. The last chapter extends a collective model with household production to the general equilibrium framework. We concentrate on the impacts of a global bargaining power shift within the household on children's cognitive achievement, especially on those who live with single mothers. The model shows that a global bargaining power change in favor of the female may not necessarily be beneficial to the children living with their single mothers. An increase of female's market equilibrium wage rate as a result of reduced labor supply by married women may induce single mothers to work longer hours, spend less time with children, and compensate them with more monetary investment compared with the case when the equilibrium wage rate stays constant. Advisors/Committee Members: Ge, Suqin (committeechair), You, Wen (committee member), Salehi-Isfahani, Djavad (committee member), Haller, Hans H. (committee member), Ashley, Richard A. (committee member).

Subjects/Keywords: General Equilibrium; Simultaneous Equations Model; Collective Model; Parental Time; Black-White Test Score Gap; Children's Cognitive Development

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APA (6^th Edition):

Chen, H. (2012). Three Essays on Family Economics and Early Childhood Development. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/27461

Chicago Manual of Style (16^th Edition):

Chen, Hengheng. “Three Essays on Family Economics and Early Childhood Development.” 2012. Doctoral Dissertation, Virginia Tech. Accessed March 07, 2021. http://hdl.handle.net/10919/27461.

MLA Handbook (7^th Edition):

Chen, Hengheng. “Three Essays on Family Economics and Early Childhood Development.” 2012. Web. 07 Mar 2021.

Vancouver:

Chen H. Three Essays on Family Economics and Early Childhood Development. [Internet] [Doctoral dissertation]. Virginia Tech; 2012. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10919/27461.

Council of Science Editors:

Chen H. Three Essays on Family Economics and Early Childhood Development. [Doctoral Dissertation]. Virginia Tech; 2012. Available from: http://hdl.handle.net/10919/27461

Technical University of Lisbon

23. Penha, Ricardo Miguel do Brito. Default risk : analysis of a credit risk model.

Degree: 2016, Technical University of Lisbon

URL: http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/12902

►

Mestrado em Ciências Actuariais

Uma parte considerável do negócio bancário inclui naturalmente o empréstimo de dinheiro. Inerentemente, o risco de não receber de volta o… (more)

▼

Mestrado em Ciências Actuariais

Uma parte considerável do negócio bancário inclui naturalmente o empréstimo de dinheiro. Inerentemente, o risco de não receber de volta o montante emprestado é assumido pela instituição bancária. Neste trabalho, o risco de incumprimento é estudado através da função de distribuição das perdas agregadas. Depois de feita a ponte entre as características de uma carteira de empréstimos de um banco e as características de uma carteira de apólices de seguros vida, os resultados da Teoria de Risco podem ser aplicados à carteira em estudo. O CreditRisk+, geralmente classificado como o modelo actuarial, é um modelo de risco de crédito que tem por base esta ponte. Para aplicação deste modelo, é necessária informação relativa às probabilidades de incumprimento de cada devedor e a exposição ao risco, que no nosso caso é igual ao montante em dívida. Na primeira parte deste trabalho é estimada a probabilidade de incumprimento através de um modelo logit, tendo em conta alguns indicadores financeiros da empresa. Seguidamente, no contexto de um modelo de risco coletivo, é aplicado o método iterativo de Panjer. Seguindo a metodologia proposta pelo modelo CreditRisk+, a carteira é seguidamente dividida em setores e, em cada setor, é introduzida volatilidade à probabilidade de incumprimento. No final, conclui-se que conseguem ser obtidos resultados semelhantes utilizando métodos de aproximação menos dispendiosos, nomeadamente com a aproximação NP. Finalmente, a taxa de juro média que o banco deveria aplicar aos empréstimos em carteira é calculada, assim como a reserva que deveria ter sido constituída.

A considerable part of the banking business includes the lending of money. Inherently, a bank incurs the risk of not receiving back the money lent. In this work, default risk is studied through the distribution function of the aggregate losses. After making the link between the characteristics of a portfolio of loans and of a life insurance policies portfolio, Risk Theory results are applied to the portfolio of loans under study. CreditRisk+, usually classified as the actuarial model, is a credit risk model which uses this link. As an input to this model, both the individual probabilities of default for each obligor and the exposure at risk are needed. The first part of this work focus on the estimation of the probability of default through a logit model, taking into account some financial indicators of the company. Then, in the context of a collective risk model, Panjer?s recursive algorithm is applied. Following the methodology of CreditRisk+, the portfolio is then divided into sectors and default volatility is introduced in each sector, reaching a different aggregate loss distribution function. At the end, we find that similar results are obtained with less time consuming approximation methods, particularly with NP approximation. Finally, the average interest rate that the bank should have charged to the loans in the portfolio is found as well as the amount of money that should have been reserved to…

Advisors/Committee Members: Centeno, Maria de Lurdes.

Subjects/Keywords: Probabilidade de incumprimento; Logit; Modelo de risco coletivo; Perda agregada; Panjer; CreditRisk+; Probability of default; Collective risk model; Aggregate loss

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APA (6^th Edition):

Penha, R. M. d. B. (2016). Default risk : analysis of a credit risk model. (Thesis). Technical University of Lisbon. Retrieved from http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/12902

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Penha, Ricardo Miguel do Brito. “Default risk : analysis of a credit risk model.” 2016. Thesis, Technical University of Lisbon. Accessed March 07, 2021. http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/12902.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Penha, Ricardo Miguel do Brito. “Default risk : analysis of a credit risk model.” 2016. Web. 07 Mar 2021.

Vancouver:

Penha RMdB. Default risk : analysis of a credit risk model. [Internet] [Thesis]. Technical University of Lisbon; 2016. [cited 2021 Mar 07]. Available from: http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/12902.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Penha RMdB. Default risk : analysis of a credit risk model. [Thesis]. Technical University of Lisbon; 2016. Available from: http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/12902

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Durban University of Technology

24. Mekgoe, Naome. The impact of strategy change on morale, performance and commitment.

Degree: 2008, Durban University of Technology

URL: http://hdl.handle.net/10321/535

►

Submitted in partial fulfilment of the requirements for the degree of Masters in Business Administration, Durban University of Technology, 2008.

Strategic change within an organisation… (more)

▼

Submitted in partial fulfilment of the requirements for the degree of Masters in Business Administration, Durban University of Technology, 2008.

Strategic change within an organisation is inevitable. Due to the competitive global landscape, organisations have to continuously adapt their strategies to remain in the market. Strategy change is most often met with resistance, and more so when the change involves downsizing. The effects of downsizing on employee morale, performance and commitment have been studied by numerous authors and a number of models for strategy change implementation consequently suggested. However, South Africa is faced with very particular challenges when dealing with change, including a high level of unemployment, fierce resistance to change in the form of collective action such as strikes, stay-aways or go-slows, political and social transformation happening simultaneously, global competition and the conflict between social and free markets within an emerging economy. Irrespective of the vast amount of international literature available on change management, there is a distinct lack of literature investigating the impact of strategy change in an emerging economy and a knowledge gap in terms of applying existing change theories in non-Western environments. This study was aimed at determining the impact of strategy change, particularly downsizing, on employee morale, performance and commitment at a global South-African based Telecommunication Company. The objectives of the study was to determine whether employees in South Africa are negatively affected by downsizing, and provide useful information to strategic managers in terms of implementation of strategy change in a South African environment. To determine the impact of downsizing as a strategy change, a questionnaire was designed based on the literature review to ascertain responses to three sections of questions, respectively measuring morale, performance and commitment. A sample of the target population was chosen based on their position/ employment type i.e. management, supervisor or general staff. The results of the empirical study revealed some very interesting points. Although all respondents demonstrated optimism in terms of their morale, performance and commitment, it was found that comparatively, managers are more negatively impacted during times of downsizing. The Telecommunication Company’s structured nature, advances in political and social reform, and solid Training and Development policy shielded the employees from the full negative impacts of downsizing because of their positive core self evaluation. The substantial amount of neutral responses (especially under management) indicated that not all respondents revealed their true feelings, a common characteristic amongst collective people. It also surfaced that even though the majority of responses indicated positive morale and performance, most respondents were considering positions outside the organisation. Based on the literature review and results from the…

Advisors/Committee Members: Mason, Roger Bruce.

Subjects/Keywords: Strategy change; Downsizing; Morale; Performance; Commitment; Collective; Change model; South Africa; Organizational change; Employee morale; Downsizing of organizations; Strategic planning

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APA (6^th Edition):

Mekgoe, N. (2008). The impact of strategy change on morale, performance and commitment. (Thesis). Durban University of Technology. Retrieved from http://hdl.handle.net/10321/535

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Mekgoe, Naome. “The impact of strategy change on morale, performance and commitment.” 2008. Thesis, Durban University of Technology. Accessed March 07, 2021. http://hdl.handle.net/10321/535.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Mekgoe, Naome. “The impact of strategy change on morale, performance and commitment.” 2008. Web. 07 Mar 2021.

Vancouver:

Mekgoe N. The impact of strategy change on morale, performance and commitment. [Internet] [Thesis]. Durban University of Technology; 2008. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10321/535.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Mekgoe N. The impact of strategy change on morale, performance and commitment. [Thesis]. Durban University of Technology; 2008. Available from: http://hdl.handle.net/10321/535

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Vanderbilt University

25. Matise, Lauren Alicia. Role of TGF-β signaling in carcinoma cell migration and tumor progression.

Degree: PhD, Cancer Biology, 2012, Vanderbilt University

URL: http://hdl.handle.net/1803/13239

► Transforming growth factor-beta (TGF-β) has a dual role during tumor progression initially as a suppressor and then as a promoter. Much is known about the… (more)

▼ Transforming growth factor-beta (TGF-β) has a dual role during tumor progression initially as a suppressor and then as a promoter. Much is known about the contribution of TGF-β signaling to tumorigenesis, yet, the role of TGF-β in epithelial-stromal migration during tumor progression is poorly understood. In this dissertation, we hypothesized that TGF-β is a critical regulator of tumor-stromal interactions that promote mammary tumor cell migration and metastasis. Fluorescently-labeled murine mammary carcinoma cells, isolated from either MMTV-PyVmT TGF-β receptor II knockout (TβRII KO) or TβRIIfl/fl control mice, were combined with mammary fibroblasts and xenografted onto the chicken embryo chorioallantoic membrane. Intravital microscopy of xenografts revealed that fibroblast-stimulated carcinoma cells utilize TGF-β signaling to drive single cell/strand migration but migrate collectively in the absence of TGF-β signaling. At epithelial-stromal boundaries, single cell/strand migration of TβRIIfl/fl carcinoma cells was characterized by α-SMA and vimentin expression, while collective migration of TβRII KO carcinoma cells was identified by E-cadherin+/p120+/β-catenin+ clusters. TβRII KO tumors exhibited a two-fold greater metastasis than TβRIIfl/fl tumors, attributed to enhanced extravasation ability. In TβRII KO tumor epithelium compared to TβRIIfl/fl epithelium, Igfbp4 and Tspan13 expression was upregulated while Col1α2, Bmp7, Gng11, Vcan, Tmeff1, and Dsc2 expression was downregulated. Downregulation of Tmeff1 was correlated with disease progression of TGF-β-insensitive mammary cancer. Our findings concerning TGF-β signaling in stromal-epithelial interactions are important in identifying migratory mechanisms that can be targeted as recourse for breast cancer treatment. In the second part of this dissertation, the timing of TGF-β signaling in relation to tumor progression was investigated through the creation of an inducible dominant-negative TβRII (dnTβRII) mouse model (MMTV-PyVmT;MMTV-rtta;dnTβRII). We hypothesized that attenuation of TGF-β signaling prior to tumorigenesis leads to increased metastasis. Results indicated that animals with attenuated TGF-β signaling prior to tumor palpation exhibited increased tumor latency and enhanced metastasis of dnTβRII-expressing carcinoma cells. These animals had an increased MDSC tumor population, as well as increased carcinoma cell secretion of MCP-1/CCL2. Our inducible dnTβRII model has therapeutic implications in determining the necessary timing of therapeutic inhibition of TGF-β signaling during cancer progression. Advisors/Committee Members: Andries Zijlstra, PhD (committee member), Rebecca Cook, PhD (committee member), Harold Moses, MD (committee member), Albert Reynolds, PhD (Committee Chair).

Subjects/Keywords: TGF-beta; tumor-stromal interactions; single cell invasion; collective cell invasion; mouse model; breast cancer; tumor microenvironment

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Matise, L. A. (2012). Role of TGF-β signaling in carcinoma cell migration and tumor progression. (Doctoral Dissertation). Vanderbilt University. Retrieved from http://hdl.handle.net/1803/13239

Chicago Manual of Style (16^th Edition):

Matise, Lauren Alicia. “Role of TGF-β signaling in carcinoma cell migration and tumor progression.” 2012. Doctoral Dissertation, Vanderbilt University. Accessed March 07, 2021. http://hdl.handle.net/1803/13239.

MLA Handbook (7^th Edition):

Matise, Lauren Alicia. “Role of TGF-β signaling in carcinoma cell migration and tumor progression.” 2012. Web. 07 Mar 2021.

Vancouver:

Matise LA. Role of TGF-β signaling in carcinoma cell migration and tumor progression. [Internet] [Doctoral dissertation]. Vanderbilt University; 2012. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/1803/13239.

Council of Science Editors:

Matise LA. Role of TGF-β signaling in carcinoma cell migration and tumor progression. [Doctoral Dissertation]. Vanderbilt University; 2012. Available from: http://hdl.handle.net/1803/13239

University of Ottawa

26. Asgari, Aliakbar. Simulation of Collective Intelligence of a Multi-Species Artificial Ecosystem Based on Energy Flow .

Degree: 2014, University of Ottawa

URL: http://hdl.handle.net/10393/31796

► Collective intelligence (CI) emerges from local coordination, collaboration and competition among the individuals within a social group. CI mainly results in a global intelligent behavior.… (more)

▼ Collective intelligence (CI) emerges from local coordination, collaboration and competition among the individuals within a social group. CI mainly results in a global intelligent behavior. One of the fundamental interactional channels within a CI system is energy flow. Each agent within an artificial or physical ecosystem must absorb energy in order to survive, evolve, breed, and reshape its local environment. In addition because the energy resources are limited in the environment, each agent has to compete with other agents to reach the required level of energy. Understanding the internal energy flow can potentially provide a deep insight into internal activities and external emergent behaviors of a given complex system. This study proposes a stochastic scheme for modeling a multi-species prey-predator artificial ecosystem with two levels of food chain. This will enable us to investigate the influence of energy flow on the ecosystem’s lifetime. The proposed model consists of a stationary hosting environment with dynamic weather condition and fruit trees. The inhabitants of this ecosystem are herbivore and carnivore birds each consisting of species. In our model, the collective behavior emerges in terms of flocking with more added rules consist of breeding, competing, resting, hunting, escaping, seeking and foraging behaviors. Using multi-species scheme, we define the ecosystem as a combination of prey and predator species with inter-competition among species within same level of food chain and intra-competition among those belonging to different levels of food chain. Furthermore, in order to model the energy within the ecosystem, some energy variables as functions of behaviors are incorporated in to the model. Finally, a simulation and visualization structure for implementing the proposed model is developed in this study. The experimental results of 11,000 simulations analyzed by Cox univariate analysis and hazard function suggest that only five out of eight behaviors can statistically significant influence the ecosystem’s lifetime. Furthermore, the results of survival analysis show that out of all possible interactions among energy factors, only two of them, interaction between flocking and seeking energies, and interaction between flocking and hunting energies, have statistically significant impact on the system’s lifetime. In addition, software implementation of the proposed framework validates the stability of simulation and visualization architecture. At last regression results using Nelson-Aalen cumulative hazard function and Cox-Snell variable and scaled Schoenfeld residuals test strongly validate our experimental results. To the best of our knowledge, there are three contributions in this research: First, the high level of complexity in the structure of the proposed model in comparison with the other systems which mostly contains only one species of prey, one species of predator and a kind of resource. While this study introduces two species of prey, capability of competition among species, dynamic weather…

Subjects/Keywords: Collective Intelligence; Agent-based modelling; Survival Analysis; Discrete Multi-Species Prey-Predator Model; Artificial Life; Artificial Ecosystem; Energy Flow

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Asgari, A. (2014). Simulation of Collective Intelligence of a Multi-Species Artificial Ecosystem Based on Energy Flow . (Thesis). University of Ottawa. Retrieved from http://hdl.handle.net/10393/31796

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Asgari, Aliakbar. “Simulation of Collective Intelligence of a Multi-Species Artificial Ecosystem Based on Energy Flow .” 2014. Thesis, University of Ottawa. Accessed March 07, 2021. http://hdl.handle.net/10393/31796.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Asgari, Aliakbar. “Simulation of Collective Intelligence of a Multi-Species Artificial Ecosystem Based on Energy Flow .” 2014. Web. 07 Mar 2021.

Vancouver:

Asgari A. Simulation of Collective Intelligence of a Multi-Species Artificial Ecosystem Based on Energy Flow . [Internet] [Thesis]. University of Ottawa; 2014. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10393/31796.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Asgari A. Simulation of Collective Intelligence of a Multi-Species Artificial Ecosystem Based on Energy Flow . [Thesis]. University of Ottawa; 2014. Available from: http://hdl.handle.net/10393/31796

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Brunel University

27. Gipson, Christina Marie. Extreme volunteering : a holistic perspective on international women sport volunteers.

Degree: PhD, 2012, Brunel University

URL: http://bura.brunel.ac.uk/handle/2438/6566 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.557780

► This thesis explores the lives of a group of fifteen exceptional women who were dedicated to the cause of advancing girls and women in sport… (more)

▼ This thesis explores the lives of a group of fifteen exceptional women who were dedicated to the cause of advancing girls and women in sport and physical activity. Over several decades, they worked in a voluntary capacity to transform women in sport through practice and policy development. Moreover, they aligned such unpaid work with personal and local experiences of volunteering that eventually led to their participation in international sport circles and policies. The key settings for their voluntary service came from their roles in the emergence and maintenance of two international women‘s sport organisations – International Association of Physical Education and Sport for Girls and Women (IAPESGW) and WomenSport International (WSI). In addition, their voluntary roles were so substantial that they were inextricably interwoven within all aspects of their lives. Therefore, the purpose of this thesis is to explore the participants‘ relationships with sport volunteering, in the particular settings of IAPESGW and WSI, whilst analysing the role of volunteering in their lives. The study utilised a holistic framework to gain an in-depth understanding about the women‘s commitment to the cause and how volunteering fits into their lifestyle. As there were no models from the sport volunteering field that were appropriate for this study, the research drew upon and developed Hustinx and Lammertyn‘s (2003) non-sport model called the Collective and Reflexive Styles of Volunteering (SOV). The SOV was valuable because it offered a multi-dimensional approach to explain how, why, and when the participants got involved with advancing women‘s sport and physical activity, and how their involvement related to and influenced their wider lifestyles. A critical realist and social constructionist philosophy was employed to have a greater understanding of the women‘s realities, and life history interviews were conducted to gain a greater understanding about how they constructed their knowledge about themselves, sport, and the world around them. The study illustrated the complexity of the women‘s volunteer participation. The findings suggested that their sport passion and identity guided many of their actions and activities throughout their life, such as choices for higher education and within professional work. In addition, the findings showed that it was their personal experiences and gained knowledge about gender disadvantages in sport that initially stimulated and then repeatedly reinforced their interests and commitment. Although these had strong impacts on the women‘s entrance into and commitment to the cause, the findings highlighted that the women had to identify the conditions of their relationships, family, and types of paid work to be compatible with levels of volunteering. The study concluded that sport researchers can benefit from examining volunteers from a holistic perspective to gain a better understanding of the conditions under which individuals make such an extreme, voluntary contribution to sport.

Subjects/Keywords: 796.082; Women volunteers; Women's organisations; Collective and reflexive styles of volunteer model in sports; Sports volunteering; Critical realism and social constructionism

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Gipson, C. M. (2012). Extreme volunteering : a holistic perspective on international women sport volunteers. (Doctoral Dissertation). Brunel University. Retrieved from http://bura.brunel.ac.uk/handle/2438/6566 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.557780

Chicago Manual of Style (16^th Edition):

Gipson, Christina Marie. “Extreme volunteering : a holistic perspective on international women sport volunteers.” 2012. Doctoral Dissertation, Brunel University. Accessed March 07, 2021. http://bura.brunel.ac.uk/handle/2438/6566 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.557780.

MLA Handbook (7^th Edition):

Gipson, Christina Marie. “Extreme volunteering : a holistic perspective on international women sport volunteers.” 2012. Web. 07 Mar 2021.

Vancouver:

Gipson CM. Extreme volunteering : a holistic perspective on international women sport volunteers. [Internet] [Doctoral dissertation]. Brunel University; 2012. [cited 2021 Mar 07]. Available from: http://bura.brunel.ac.uk/handle/2438/6566 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.557780.

Council of Science Editors:

Gipson CM. Extreme volunteering : a holistic perspective on international women sport volunteers. [Doctoral Dissertation]. Brunel University; 2012. Available from: http://bura.brunel.ac.uk/handle/2438/6566 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.557780

28. Šimleša, Milija. Collectif flow : sociocognitive model of optimal collaboration : Le flow collectif : modèle sociocognitif de la collaboration optimale.

Degree: Docteur es, Psychologie, 2018, Sorbonne Paris Cité

URL: http://www.theses.fr/2018USPCB203

► Face à la pression à innover, les entreprises cherchent à augmenter la créativité des équipes travaillant sur les projets d'innovation tout en favorisant leur bien-être… (more)

▼ Face à la pression à innover, les entreprises cherchent à augmenter la créativité des équipes travaillant sur les projets d'innovation tout en favorisant leur bien-être de façon durable. La littérature suggère que le Flow (Csikszentmihalyi, 1975-2000), l'expérience d'hyperconcentration et de fonctionnement optimal humain, est bénéfique à la fois au bien-être et à la performance. Toutefois, le sujet est assez peu exploré quand il s'agit du Flow dans des contextes sociaux. Par conséquent, l'objectif de la thèse est de contribuer à la compréhension du concept du Flow Collectif (FC). Soutenu par l'entreprise SBT Human(s) Matter, ce projet a aussi l'objectif de transférer ces avancées de connaissances sur le Flow et la créativité de l'équipe afin d'améliorer le bien-être à long-terme et d'atteindre la collaboration optimale pour les clients de SBT. Nous définissons le FC comme un état se manifestant quand le groupe agit comme un tout. Les membres de l'équipe sont absorbés dans l'activité commune, se coordonnent efficacement et se sentent bien ensemble. Ensuite, nous avons construit un modèle sociocognitif conceptualisant le FC comme un processus reposant principalement sur les processus attentionnels, motivationnels et socio-identitaires, déclenchés par les préconditions spécifiques comme l'empathie des membres de l'équipe, l'ambition collective et une identité partagée. Six expérimentations en laboratoire et quatre études de terrain nous ont permis de tester le modèle et les hypothèses. La recherche a été menée avec des élèves ingénieurs travaillant sur des projets d'innovation. Les résultats de nos premières expérimentations montrent que le niveau moyen de théorie de l'esprit ne prédit ni le FC ni la créativité des groupes. Cela va à l'encontre des recherches antérieures sur l'intelligence collective. Les analyses indiquent que le FC peut être prédit par la motivation intrinsèque et l'identification sociale des membres du groupe. En outre, la créativité des groupes est prédite par l'expérience individuelle du Flow. Les résultats de la 2eme étude, qui a manipulé le niveau d'identification de l'action a montré qu'un niveau élevé d'identification de l'action stimule l'identification sociale, la motivation intrinsèque et le Flow des membres du groupe. L'analyse de médiation indique que l'effet de l'identification de l'action sur l'expérience du Flow est médiée par l'identification sociale et la motivation intrinsèque des membres. Les études expérimentales testant l'impact de l'identité sociale ont montré que, contrairement à nos attentes, la saillance des indices d'identité sociale n'impacte ni le FC ni la performance. De nouveau, nous observons que la motivation intrinsèque et l'identification sociale sont des prédicteurs du Flow, au niveau individuel et collectif. Cependant, le FC ne semble pas être prédit par le Flow individuel des membres de l'équipe. Notre dernière étude expérimentale explorant l'expérience du Flow à distance, en se fondant sur le modèle SIDE, a testé la créativité collective en ligne dans des… Advisors/Committee Members: Buisine, Stéphanie (thesis director).

Subjects/Keywords: Flow; Flow collectif; Modèle sociocognitif; Bien-être; Groupe; Créativité; Flow; Collective flow; Sociocognitive model; Well-being; Group; Creativity; 302.35

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Šimleša, M. (2018). Collectif flow : sociocognitive model of optimal collaboration : Le flow collectif : modèle sociocognitif de la collaboration optimale. (Doctoral Dissertation). Sorbonne Paris Cité. Retrieved from http://www.theses.fr/2018USPCB203

Chicago Manual of Style (16^th Edition):

Šimleša, Milija. “Collectif flow : sociocognitive model of optimal collaboration : Le flow collectif : modèle sociocognitif de la collaboration optimale.” 2018. Doctoral Dissertation, Sorbonne Paris Cité. Accessed March 07, 2021. http://www.theses.fr/2018USPCB203.

MLA Handbook (7^th Edition):

Šimleša, Milija. “Collectif flow : sociocognitive model of optimal collaboration : Le flow collectif : modèle sociocognitif de la collaboration optimale.” 2018. Web. 07 Mar 2021.

Vancouver:

Šimleša M. Collectif flow : sociocognitive model of optimal collaboration : Le flow collectif : modèle sociocognitif de la collaboration optimale. [Internet] [Doctoral dissertation]. Sorbonne Paris Cité; 2018. [cited 2021 Mar 07]. Available from: http://www.theses.fr/2018USPCB203.

Council of Science Editors:

Šimleša M. Collectif flow : sociocognitive model of optimal collaboration : Le flow collectif : modèle sociocognitif de la collaboration optimale. [Doctoral Dissertation]. Sorbonne Paris Cité; 2018. Available from: http://www.theses.fr/2018USPCB203

University of Notre Dame

29. Morgen Elizabeth Anyan. Physical and Environmental Factors Affecting the Swarm Motility of Pseudomonas aeruginosa</h1>.

Degree: Civil Engineering and Geological Sciences, 2015, University of Notre Dame

URL: https://curate.nd.edu/show/41687h1659s

► Pseudomonas aeruginosa is a ubiquitous, Gram-negative bacterium that utilizes several different modes of motility to colonize surfaces, including swarming, which is the coordinated movement… (more)

▼ Pseudomonas aeruginosa is a ubiquitous, Gram-negative bacterium that utilizes several different modes of motility to colonize surfaces, including swarming, which is the coordinated movement of cells over surfaces in groups. Swarming facilitates surface colonization and biofilm development for P. aeruginosa, and it is known that swarming behavior is influenced by changes in surface moisture and nutrient composition. Variations in assay preparation factors, such as nutrient-agar medium volume, curing time, incubation humidity, agar variety and carbon source, can greatly influence swarming behavior once cells are added to these assays. A range of environmental and preparation factors were investigated to determine their effect(s) on P. aeruginosa swarm motility, and a set of general guidelines for increasing swarm assay reproducibility were developed. While swarming requires a functional flagellum, the involvement of type IV pili (TFP) appendages in Pseudomonas aeruginosa swarming is unclear. The influence of TFP on swarming motility was investigated using a combination of iterative laboratory experiments and in silico computer simulations. It was determined that TFP preferentially interact with other TFP during P. aeruginosa swarming, and that these interactions promote cell-cell associations that allow for moderation of swarm motility when needed, such as in the presence of a toxic antibiotic. While previous studies have shown surface-attached bacterial biofilms to be highly resistant to heavy metal toxicity, little is known about the influence of heavy metals upon surface motile bacteria and developing biofilms. A variety of laboratory assays were utilized to examine differences in bacterial behavior in response to two metals, cadmium and nickel. Metal resistance was shown to vary with motility mode (swimming vs. swarming), but did not correlate with rhamnolipid production, as was originally hypothesized; while cell products such as rhamnolipid were shown to bind heavy metals (as expected) and should limit metal bioavailability, the results suggest at least one additional mechanism (as yet undetermined) that promotes cell survival during swarming in the presence of these heavy metals. Advisors/Committee Members: Dr. Jeremy Fein, Committee Member, Dr. Robert Nerenberg, Committee Member, Dr. Joshua Shrout, Committee Chair, Dr. Mark Alber, Committee Member.

Subjects/Keywords: computational model; heavy metals; collective motion; motility mode; rhamnolipid; predictive simulations; motility assay; swarming; biofilms; Pseudomonas aeruginosa

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Anyan, M. E. (2015). Physical and Environmental Factors Affecting the Swarm Motility of Pseudomonas aeruginosa</h1>. (Thesis). University of Notre Dame. Retrieved from https://curate.nd.edu/show/41687h1659s

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Anyan, Morgen Elizabeth. “Physical and Environmental Factors Affecting the Swarm Motility of Pseudomonas aeruginosa</h1>.” 2015. Thesis, University of Notre Dame. Accessed March 07, 2021. https://curate.nd.edu/show/41687h1659s.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Anyan, Morgen Elizabeth. “Physical and Environmental Factors Affecting the Swarm Motility of Pseudomonas aeruginosa</h1>.” 2015. Web. 07 Mar 2021.

Vancouver:

Anyan ME. Physical and Environmental Factors Affecting the Swarm Motility of Pseudomonas aeruginosa</h1>. [Internet] [Thesis]. University of Notre Dame; 2015. [cited 2021 Mar 07]. Available from: https://curate.nd.edu/show/41687h1659s.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Anyan ME. Physical and Environmental Factors Affecting the Swarm Motility of Pseudomonas aeruginosa</h1>. [Thesis]. University of Notre Dame; 2015. Available from: https://curate.nd.edu/show/41687h1659s

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Maryland

30. Martin, Charles E. Adapting Swarm Intelligence For The Self-Assembly And Optimization Of Networks.

Degree: Mathematics, 2011, University of Maryland

URL: http://hdl.handle.net/1903/12274

► While self-assembly is a fairly active area of research in swarm intelligence and robotics, relatively little attention has been paid to the issues surrounding the… (more)

▼ While self-assembly is a fairly active area of research in swarm intelligence and robotics, relatively little attention has been paid to the issues surrounding the construction of network structures. Here, methods developed previously for modeling and controlling the collective movements of groups of agents are extended to serve as the basis for self-assembly or "growth" of networks, using neural networks as a concrete application to evaluate this novel approach. One of the central innovations incorporated into the model presented here is having network connections arise as persistent "trails" left behind moving agents, trails that are reminiscent of pheromone deposits made by agents in ant colony optimization models. The resulting network connections are thus essentially a record of agent movements. The model's effectiveness is demonstrated by using it to produce two large networks that support subsequent learning of topographic and feature maps. Improvements produced by the incorporation of collective movements are also examined through computational experiments. These results indicate that methods for directing collective movements can be extended to support and facilitate network self-assembly. Additionally, the traditional self-assembly problem is extended to include the generation of network structures based on optimality criteria, rather than on target structures that are specified a priori. It is demonstrated that endowing the network components involved in the self-assembly process with the ability to engage in collective movements can be an effective means of generating computationally optimal network structures. This is confirmed on a number of challenging test problems from the domains of trajectory generation, time-series forecasting, and control. Further, this extension of the model is used to illuminate an important relationship between particle swarm optimization, which usually occurs in high dimensional abstract spaces, and self-assembly, which is normally grounded in real and simulated 2D and 3D physical spaces. Advisors/Committee Members: Reggia, James A (advisor).

Subjects/Keywords: Applied mathematics; Computer science; Collective Movements; Developmental Model; Neural Network; Particle Swarm Optimization; Self-Assembly; Swarm Intelligence

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Martin, C. E. (2011). Adapting Swarm Intelligence For The Self-Assembly And Optimization Of Networks. (Thesis). University of Maryland. Retrieved from http://hdl.handle.net/1903/12274

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Martin, Charles E. “Adapting Swarm Intelligence For The Self-Assembly And Optimization Of Networks.” 2011. Thesis, University of Maryland. Accessed March 07, 2021. http://hdl.handle.net/1903/12274.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Martin, Charles E. “Adapting Swarm Intelligence For The Self-Assembly And Optimization Of Networks.” 2011. Web. 07 Mar 2021.

Vancouver:

Martin CE. Adapting Swarm Intelligence For The Self-Assembly And Optimization Of Networks. [Internet] [Thesis]. University of Maryland; 2011. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/1903/12274.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Martin CE. Adapting Swarm Intelligence For The Self-Assembly And Optimization Of Networks. [Thesis]. University of Maryland; 2011. Available from: http://hdl.handle.net/1903/12274

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Open Access Theses and Dissertations