Spelling suggestions: "subject:"level.analysis"" "subject:"levelanalysis""
31 |
The costs of reproduction in evolutionary demography : an application of Multitrait Population Projection Matrix models / Les coûts de la reproduction en démographie évolutive : Une application des modèles de Matrices de Projection de Population MultitraitCoste, Christophe 20 November 2017 (has links)
Les coûts de la reproduction sont un compromis biologique (trade-off ) fondamental en théorie des histoires de vie. Par ce compromis, le succès, pour un organisme, d’un évènement de reproduction réduit sa survie et sa fertilité futures. Pour les écologues, ce trade-off correspond principalement à un compromis physiologique résultant d’un processus d’allocation ayant lieu à chaque instant et au niveau de chaque individu. Au contraire, en démographie évolutive, il est envisagé comme un trade-off génétique découlant du polymorphisme génotypique d’un gène pléiotropique agissant de manière antagoniste sur la reproduction aux jeunes âges et la fitness aux âges élevés. L’étude des mécanismes des coûts de la reproduction, physiologiques et génétiques, de leur possible cohabitation et de leur effets relatifs, croisés et conjoints est le sujet de cette thèse. Un examen attentif de la définition originelle des coûts de la reproduction par Williams (1966), nous permet de construire un modèle théorique des coûts physiologiques intégrant leurs aspects mécaniques et évolutifs. Cette construction nous permet d’induire l’intensité des coûts de la reproduction selon la position d’un organisme sur trois continuums d’histoire de vie: "slow-fast", "income-capital breeders" et "quantity-quality".A partir de la décomposition, par Stearns (1989b), de l’architecture des contraintes d’histoire de vie en trois parties – le niveau génotypique, la structure intermédiaire et le niveau phénotypique – nous étendons notre modèle conceptuel pour y intégrer à la fois des trade-offs physiologiques et génétiques. Cela nous permet d’inférer les effets de l’environnement, de sa variance et de la stochasticité individuelle sur la détectabilité de chaque famille de coûts. La différence entre coûts physiologiques et génétiques se retrouve également dans leur modélisation mathématique. Il est donc nécessaire de développer de nouveaux modèles permettant d’incorporer coûts physiologiques et génétiques. Nous proposons ensuite une méthode vectorielle de construction d’un tel type de modèle, que nous appelons Matrice de Projection de Population Multitrait (MPPM). Ce dernier peut implémenter chaque type de coût en l’intégrant dans la matrice en tant que trait. Nous étendons ensuite aux MPPMs les techniques d’analyse de sensibilité, standards en démographie évolutive, des modèles à un trait aux MPPMs. Surtout, nous décrivons un nouvel outil d’analyse, pertinent en théorie des histoires de vie et en démographie évolutive: la Trait Level Analysis. Elle consiste à comparer des modèles qui partagent les mêmes propriétés asymptotiques. Ceci est rendu possible par le repliement d’une MPPM selon certains traits, une opération qui réduit le nombre de traits du modèle en moyennant ses transitions selon les abondances ergodiques relatives. Ainsi, la Trait Level Analysis permet de mesurer l’importance évolutive des coûts de la reproduction en comparant des modèles implémentant ces coûts, avec des versions ergodiquement équivalentes de ces modèles mais repliées selon les traits supportant les compromis. Nous utilisons des méthodes, classiques et nouvelles, de calculs des moments de la fitness – gradient de sélection, variance du succès reproducteur, variance environnementale – que nous appliquons aux modèles avec coûts et sans coûts afin de mesurer leurs effets démographiques et évolutifs. Nous présentons les effets conjoints des coûts physiologiques et génétiques sur la distribution par âge des taux vitaux d’une population. Nous montrons également comment les coûts physiologiques influencent les deux composants de la sélection efficace, en aplatissant le gradient de sélection d’un côté et en accroissant la taille efficace de la population de l’autre. Enfin, nous démontrons comment l’effet tampon des coûts sur les variances environnementales et démographiques améliore la résilience d’une population soumise aux coûts physiologiques de la reproduction / Costs of reproduction are pervasive in life history theory. Through this constraint, the reproductive effort of an organism at a given time negatively affects its later survival and fertility. For life historians, they correspond mostly to a physiological trade-off that stems from an allocative process, occurring at each time-step, at the level of the individual. For evolutionary demographers, they are essentially about genetic trade-offs, arising from a genetic variance in a pleiotropic gene acting antagonistically on early-age and late-age fitness components. The study, from an evolutionary demographic standpoint, of these mechanisms and of the relative, cross and joint effects of physiological and genetic costs, is the aim of this thesis. The close examination of Williams (1966)’s original definition of the physiological costs of reproduction led us to produce a theoretical design of their apparatus that accounts for both their mechanistic and evolutionary mechanisms. This design allowed us to make predictions with regards to the strength of costs of reproduction for various positions of organisms on three life-history spectra: slow-fast, income-capital breeders and quality-quantity. From Stearns (1989b)’s tryptic architecture of life history trade-offs –that divides their structure into the genotypic level, the intermediate structure and the phenotypic level – we devised a general framework, which models the possible cohabitation of both physiological and genetic costs. From this, we inferred differing detectability patterns of both types of costs according to the environmental conditions, their variance and individual stochasticity. We could also establish that both costs buffer environmental variations, but with varying time windows of effect. Their dissimilarity emerges also from the differences between mathematical projection models specific to each cost. A new family of evolutionary models is therefore required to implement both physiological and genetic trade-offs. We then describe the vector-based construction method for such a model which we call Multitrait Population Projection Matrix (MPPM) and which allows incorporating both types of costs by embedding them as traits into the matrix. We extend the classical sensitivity analysis techniques of evolutionary demography to MPPMs. Most importantly, we present a new analysis tool for both life history and evolutionary demography: the Trait Level Analysis. It consists in comparing pairs of models that share the same asymptotic properties. Such ergodic equivalent matrices are produced by folding, an operation that consists in reducing the number of traits of a multi-trait model, by averaging transitions for the traits folded upon, whilst still preserving the asymptotic flows. The Trait Level Analysis therefore allows, for example, to measure the evolutionary importance of costs of reproduction by comparing models incorporating them with folded versions of these models from which the costs are absent. Using classical and new methods to compute fitness moments – selection gradient, variance in reproductive success, environmental variance - in models with and without the costs, we can show their effects on various demographic and evolutionary measures. We reveal, in this way, the combined effects of genetic and physiological costs on the vital rates of an age-structured population. We also demonstrate how physiological costs affect both components of effective selection, as they flatten the slope of selection gradients and increase the effective size of a population. Finally, we show how their buffering of environmental and demographic variance confer greater resilience to populations experiencing physiological costs of reproduction
|
32 |
從衝突到合作: 東南亞國家雙邊互動關係的實證研究 / FROM CONFLICT TO COOPERATION: AN EMPIRICAL STUDY OF BILATERAL INTERACTION BETWEEN COUNTRIES IN SOUTHEAST ASIA陳偉華, Chen, Wei Hua Unknown Date (has links)
本研究試圖將雙邊關係導入區域整合的解釋範疇,主要探討東南亞國家之間雙邊互動關係的解釋因素,以及東協對應成員國間衝突本質的制度建構,從而推進區域合作的進程。
從理論文獻與經驗事件,本研究運用「雙邊層次理論」(dyadic level theories)解釋東南亞國家間的互動現象,選擇「相對權力」、「軍事實力」、「政體類型」、「貿易互賴」、「經濟發展」作為開發中國家雙邊關係的解釋變數,用以理解東協成員國走向衝突與合作的選擇,並對「衝突-合作」的理論命題進行檢驗,據以提出適用於東協國家雙邊互動變異的解釋模式。本研究主張,開發中區域內雙邊關係受到國家屬性與相對特質的影響,爰須從個別國家互動交往的變遷軌跡予以觀察,其解釋變數將持續影響未來的整合道路。
在理論檢證的操作上,本研究參照「事件資料分析」(event-data analysis)方法,設計「雙邊互動的衝突—整合量表」(the Conflict-Integration Continuum, CIC),蒐集自1990年至2012年的「時間序列與橫斷面資料」(TSCS),並建置「東協成員國雙邊互動關係時間序列資料庫」(ASEAN-TSCS Data set)。透過資料庫分析和預測模型之建構,本研究釐清東協雙邊關係變異的解釋因素,並確認對於開發中國家間互動關係的影響關係。
為周延地理解東南亞次區域體系中單元層次(國家間互動)與整體層次(東協整合)的互動連結,本研究對東協歷年構建的安全制度與爭端解決機制進行文本分析,擇取區域內各組雙邊關係進行案例研究。透過對東協國家相對特質與互動事件的比較,進一步檢證次體系內國家間互動行為的關聯特徵,本研究期能為東南亞的整合研究提供一種理論啟示。 / This study aims to interpret regional integration through the lens of bilateral relations. It primarily addresses the factors in bilateral interactions between the Southeast Asian nations and delves into the process in which the ASEAN put forth an architecture to resolve the inherent conflicts between its member states to further promote regional cooperation.
Based on theoretical literatures and historical events, this study uses dyadic-level theories to explain interactions among the Southeast Asian countries, chooses “Relative Power,” “Military Capability,” “Regime Types,” “Trade Interdependence,” and “Economic Development” as explanatory variables for bilateral relations between developing countries in this region for the purpose of understanding the choices made by the ASEAN member states towards either conflict or cooperation, and inspects the theoretical proposition of “conflict-cooperation” so as to put forth an explanatory model applicable for changes in the bilateral interactions between the ASEAN countries. The author argues that the bilateral relations in a developing region are not only influenced by the objective characteristics of each country, but also the relative relation to other countries. Therefore, observing the interactions between each individual country to others is required. The independent valuables are also dynamically influencing the approach of integration in the future.
In terms of theoretical validation, a conflict-integration continuum (CIC) is designed for this paper with reference to event-data analysis approach, time-series cross-sectional (TSCS) data between 1990 and 2012 is collected, and an ASEAN-TSCS data set is established. By means of database analysis and construction of a prediction model, this research clarifies the explanatory factors for changes in bilateral relations between ASEAN countries and determines the effects that they have on interactions among developing countries.
For the purpose of comprehensively understanding interactive linkages between the unit level (interactions amongst nations) and the overall level (ASEAN integration) in the Southeast Asia sub-regional system, this paper performs a text analysis on security regimes and dispute settlement mechanisms constructed by the ASEAN over the years and selects bilateral relations of pairs in the region as case studies.
In addition to the data-driven analysis above, comprehensive knowledge of the interactive linkages between individual country and the overall ASEAN are also required. Therefore, a text analysis on security regimes and dispute settlement mechanisms constructed by the ASEAN is also conducted in this thesis. Several pairs of countries are used as case studies to investigate the bilateral relations in this region. By comparing relative qualities and interactional events of ASEAN countries, correlative features of interactions among the countries in the subsystem are further validated, as such, this paper aims to provide a theoretical revelation for research on the integration of Southeast Asia.
|
33 |
Intellectual Capital as a Driver of Product Innovation : empirical Studies on European Firms / Le capital immatériel en tant que déterminant de l’innovation-produit : recherches empiriques sur les entreprises européennesBarreneche Garcia, Andrés 12 February 2014 (has links)
La théorie des ressources affirme que les avantages concurrentiels résident dans la mobilisation des actifs précieux qui sont difficiles à imiter. L'Approche du Capital Immatériel (ACI) prolonge cet argument en étudiant ces ressources; plus particulièrement celles qui sont fondées sur la connaissance et qui peuvent être classifiées dans l'une des catégories suivantes: Capital Humain, Capital Structurel, ou Capital Relationnel.Cette thèse cherche à évaluer l'ACI en tant que cadre pour rechercher les conditions favorables permettant aux entreprises d'innover en créant des nouveaux biens et services (produits). Spécifiquement, ce projet doctoral vise à analyser les rôles de chaque type de capital immatériel dans l'innovation de produits. Fondée sur des données européennes, cette thèse examine différents types d'entreprises (nouvelles, petites et moyennes entreprises, et grandes entreprises) et les secteurs d'activités (y compris l'industrie et les services). Le Chapitre 1 examine le capital humain et d'autres déterminants du taux de création d'entreprises dans les villes européennes. Ensuite, le Chapitre 2 examine l'impact de la diffusion des connaissances sur la façon dont l'investissement en R&D interne apporte à l'innovation de produits. Puis, le Chapitre 3 utilise le concept de capacité d'absorption pour explorer comment les similarités des actifs immatériels entre les entreprises sont associées à la performance de leur capital relationnel.En général, ce projet doctoral souligne que l'ACI fournit un cadre propice pour formuler et vérifier des hypothèses concernant les moteurs de l'innovation de produits. Il permet de mener des études portant sur la façon dont les entreprises mobilisent leurs actifs immatériels afin de développer et commercialiser de nouveaux produits. Par ailleurs, cette approche facilite l'interprétation des résultats afin de recommander des décisions managériales et des politiques publiques visant à articuler davantage les pratiques des entreprises. / The resource-based view of the firm argues that competitive advantages lie in the use of valuable resources that are difficult to emulate. The intellectual capital-based view (ICV) extends this argument by studying such resources; particularly intangible (or knowledge) assets that may be classified in three main components: human, structural, and relational capital.This thesis aims to evaluate the ICV as a framework for understanding the favorable conditions that allow firms to innovate by creating new goods and services (i.e., products). Specifically, this thesis seeks to analyze the specific roles of each capital capital component in product innovation. Using European data, it covers an ample range of firm types (i.e, nascent firms, small and medium-sized enterprises, and large firms) and business sectors (including manufacturing and services). Chapter 1 investigates human capital and other determinants of business creation as a measure of entrepreneurship in European cities. Chapter 2 examines the impact of knowledge spillovers on in-house R&D investment and innovation performance in firms. Chapter 3 leverages the concept of absorptive capacity to explore whether similar configurations of IC are associated with the performance of relational capital in companies.Overall, this dissertation finds that the ICV provides a fertile ground to formulate and test hypotheses concerning the drivers of product innovation. It allows to focus research on how companies mobilize intangible assets in order to develop and commercialize new goods and services. Furthermore, this approach provides several lessons for managers and policy recommendations that may help to articulate corporate practices.
|
34 |
Understanding physical activity behavior in inclusive physical educationJin, Jooyeon 21 June 2012 (has links)
Physical education is important to promote physical activity of adolescents with and without disabilities, but many adolescents are not active during physical education classes. Innovative instructional strategies are imperative to change this phenomenon, but it will be challenging to develop effective instructional strategies without thorough understanding of students' physical activity behavior in physical education settings. Two studies were conducted to comprehensively understand physical activity behavior of adolescents with and without disabilities in inclusive physical education classes at middle schools.
The first study investigated the utility of the integrative theory to predict students' physical activity intentions and behavior at the intrapersonal level. A total of 577 participants, including 24 adolescents' with disabilities, were recruited from 8 middle schools in Korea. In a prospective design, participants' psychosocial constructs and physical activity data were collected by survey questionnaires and electronic pedometers. A multilevel (design-based) structural equation modeling using maximum likelihood estimation with robust standard error correction found that students' attitudes, subjective norms, and barrier-efficacy significantly predicted students' goal intentions. Students' implementation intentions and task-efficacy were significant predictors of physical activity behavior. In addition, implementation intentions completely mediated the relationship between goal intentions and physical activity behavior.
The second study investigated three conceptual models, including process-product model, student mediation model, and ecological model, to predict students' physical activity behavior at the interpersonal and environmental levels. A total of 13 physical educators teaching inclusive physical education and their 503 students, including 22 students with disabilities, were recruited from 8 middle schools in Korea. A series of multilevel (model-based) regressions with maximum likelihood estimation showed that the ecological model was the most effective model in prediction of students' physical activity behavior. Specifically, it was found that teachers' teaching behavior and students' implementation intentions were significant predictors of the students' physical activity behavior when interacted with gender, disability, lesson contents, instructional models, and class locations.
In conclusion, findings suggest that intrapersonal, interpersonal, and environmental predictors provide a systematic account in the understanding of students' physical activity behavior in physical education settings. Future studies should consider all three factors simultaneously to effectively develop instructional strategies that promote physical activity of adolescents' with and without disabilities in physical education classes. / Graduation date: 2013
|
35 |
“Globalization from below”? Uncovering the Nuances in Grassroots/Transnational MobilizationHettiarachchi, Cindy 07 February 2014 (has links)
This thesis offers a micro-level analysis of labour and women’s organizing in the context of globalization through the case study of the Comité Fronterizo de Obrer@s (CFO) from 1978 to 2009. We will see how one organization’s journey can give us insights into the complexities of local organizing and transnational networking in the context of globalization. This case study can be seen as a lens through which we can examine the changing context of labour and women’s organizing in the distinct maquiladora environment. My work positions itself in the “globalization from above” and “globalization from below” debate, specifically around the question of transnational social movements that form the “globalization from below” category in the context of a political economy analysis. However, where my thesis differs from a more traditional analysis of the resistance to globalization, such as that found in the global justice movements or alter-globalization movements, is in its focus on the complexities of organizing at the local level and the pressures that these local organizations feel from “above” from their transnational partners. What this thesis adds to the literature are the stories from the actual members of the organization, about the structure, the decision-making process of their organization, the role of the leadership and the connections between the local organizing and the transnational civil society partners.
The complex history of an organization that has been there since the beginning of the maquiladora industry allows us a better understanding of the changing conditions and struggles these workers have faced. This journey through the history of the CFO, the richness of this empirical data encompassing more than 30 years of organizing in the maquiladora zone of Northern Mexico also allows us to explore “globalization from below” through different lens. This thesis brings in a micro-detail analysis of a specific organization in a specific context where we can see clearly transnational civil society linkages and the impact of globalizing capitalist neoliberal economy. As such, this research can offer us new insights into the intricacies of local-global linkages and thus contribute to an area often neglected or underdeveloped in international relations (IR).
|
36 |
Mobilizing critical feminist engagement with New Public ManagementWeeden, Sara Ashleigh 06 December 2010 (has links)
This thesis mobilizes a feminist critique to examine the ways in which New Public Management (NPM) represents a gendered discourse. Using Foucauldian discourse analysis, NPM is mapped as a discursive field in order to tease out its dominant and subordinate discourses. The tensions between the dominant discourses and between the dominant and subordinate discourses are examined. The discursive themes of NPM are then engaged using a feminist post-structuralist framework in order to develop a feminist critique. From this critique, it is argued that NPM discourses reinscribe dominant masculinity as well as challenge the Weberian model of bureaucracy by reconstructing a gendered division of labour that takes place entirely within the public sphere.
|
37 |
Creating Resilience – A Matter of Control or Computation? : Resilience Engineering explored through the lenses of Cognitive Systems Engineering and Distributed Cognition in a patient safety case studyLundqvist, Tomas January 2013 (has links)
In recent years, the research approach known as Resilience Engineering (RE) has offered a promising new way of understanding safety-critical organizations, but less in the way of empirical methods for analysis. In this master’s thesis, an extensive comparison was made between RE and two different research approaches on cognitive systems: Distributed Cognition (DC) and Cognitive Systems Engineering (CSE) with the aim of exploring whether these approaches can contribute to the analysis and understanding of resilience. In addition to a theoretical comparison, an ethnographic healthcare case study was conducted, analyzing the patient safety at a pediatric emergency department using the Three-Level Analytical Framework from DC and the Extended Control Model from CSE, then conducting an RE analysis based on the former two analyses. It was found that while the DC and CSE approaches can explain how an organization adapts to current demands, neither approach fully addresses the issue of future demands anticipation, central to the RE perspective. However, the CSE framework lends itself well as an empirical ground providing the entry points for a more thoroughgoing RE analysis, while the inclusion of physical context in a DC analysis offers valuable insights to safety-related issues that would otherwise be left out in the study of resilience.
|
38 |
資訊扭曲在英國選民脫歐抉擇之角色 / The Role of Information Distortion in the Brexit Referendum林琮紘, Lin, Tsung Hung Unknown Date (has links)
2016年的英國脫歐公投,最終以51.89%比48.11%的差距,決定了英國脫歐的命運。各界紛紛揣測各種可能造成民眾投下脫歐一票的原因,包含個人經濟狀況、政黨認同、受民粹操控、反菁英、對歐洲認同等。本文針對既有研究中尚存在之空缺,聚焦「議題投票取向」對選民投票抉擇的影響,探究脫歐陣營對資訊的扭曲是否對選民的投票抉擇有顯著影響。論文就脫歐派針對國民健保、移民、脫歐後的英國對外經貿、失業率、勞工權益保障與是否能無條件持續享有歐盟單一市場好處這六項議題,透過「二分勝算對數模型」進行分析,從個體層次行為來瞭解資訊扭曲對選民在脫歐公投中投票行為的影響。
研究結果顯示,在移民潮來襲、民眾高喊反全球化與選民不安全感高漲的大環境背景下,脫歐陣營對選民所關心之議題的煽動與對資訊的操控使選民在做出投票抉擇時受到明顯誤導。此外,模型結果亦顯示,選民的個人社經背景與心理態度認知同樣對選民投票行為產生影響。總結而言,本研究透過微觀層次的分析,針對促使選民投下脫歐一票的因素做出深入探討,並以「資訊扭曲」作為重要變數,補充議題投票相關研究之不足。 / In the Brexit referendum held in June 2016, 51.89 per cent of the voter voted Leave and 48.11 per cent voted Remain. The result sealed the fate of the UK as an outsider of the European Union. While the reasons behind voter’s choice to leave the EU remain disputed, individual voter’s socio-economic status, party identification, populism, anti-elite mood, and identity toward European were among the most frequently listed factors. In order to fill the gap that existing researchs has left, this thesis focuses on the significance of “issue voting” in voting behavior. It discusses if the distortion of information by the Leave campaign had a significant impact on people’s voting choice. It uses the “logistic regression model” to analyse six issues brought about by the Leave campaign. They include the NHS, immigration, trading arrangements with other nations, unemployment, working conditions for British workers, and unconditional maintaining of all the benefits from the EU. By focusing on the individual level, I try to investigate how the distortion of information has impacted upon people’s voting behavior in the Brexit referendum.
The study shows that against the background of an increased flow of immigrants and heightened anti-globalization mood, voters had a strong sense of insecurity. Under such circumstances, the Leave campaign exploited the opportunity to incite voters on issues they cared most about, manipulated information during the demagogic campaign, and misled people on their voting decision. In addition, the model also demonstrates that voters’ socioeconomic status and mental cognizance have the same effect on people’s voting behavior. In the nutshell, this thesis uses micro-level analysis to investigate voter behavior in the Brexit referendum. It brings in “information distortion” as a key variable in explaining voter behavior, a variable largely neglected in the existing literature on issue voting.
|
39 |
“Globalization from below”? Uncovering the Nuances in Grassroots/Transnational MobilizationHettiarachchi, Cindy January 2014 (has links)
This thesis offers a micro-level analysis of labour and women’s organizing in the context of globalization through the case study of the Comité Fronterizo de Obrer@s (CFO) from 1978 to 2009. We will see how one organization’s journey can give us insights into the complexities of local organizing and transnational networking in the context of globalization. This case study can be seen as a lens through which we can examine the changing context of labour and women’s organizing in the distinct maquiladora environment. My work positions itself in the “globalization from above” and “globalization from below” debate, specifically around the question of transnational social movements that form the “globalization from below” category in the context of a political economy analysis. However, where my thesis differs from a more traditional analysis of the resistance to globalization, such as that found in the global justice movements or alter-globalization movements, is in its focus on the complexities of organizing at the local level and the pressures that these local organizations feel from “above” from their transnational partners. What this thesis adds to the literature are the stories from the actual members of the organization, about the structure, the decision-making process of their organization, the role of the leadership and the connections between the local organizing and the transnational civil society partners.
The complex history of an organization that has been there since the beginning of the maquiladora industry allows us a better understanding of the changing conditions and struggles these workers have faced. This journey through the history of the CFO, the richness of this empirical data encompassing more than 30 years of organizing in the maquiladora zone of Northern Mexico also allows us to explore “globalization from below” through different lens. This thesis brings in a micro-detail analysis of a specific organization in a specific context where we can see clearly transnational civil society linkages and the impact of globalizing capitalist neoliberal economy. As such, this research can offer us new insights into the intricacies of local-global linkages and thus contribute to an area often neglected or underdeveloped in international relations (IR).
|
40 |
ATLAS jet trigger performance in Run 2 and searching for new physics with trigger-level jetsReynolds, Bryan January 2021 (has links)
No description available.
|
Page generated in 0.042 seconds