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1

Learning Physical Domains: Toward a Theoretical Framework.  

ERIC Educational Resources Information Center

People use and extend their knowledge of the physical world constantly. Understanding how this fluency is achieved would be an important milestone in understanding human learning and intelligence, as well as a useful guide for constructing machines that learn. This paper presents a theoretical framework that is being developed in an attempt to…

Forbus, Kenneth D.; Gentner, Dedre

2

Theoretical Models and Operational Frameworks in Public Health Ethics  

PubMed Central

The article is divided into three sections: (i) an overview of the main ethical models in public health (theoretical foundations); (ii) a summary of several published frameworks for public health ethics (practical frameworks); and (iii) a few general remarks. Rather than maintaining the superiority of one position over the others, the main aim of the article is to summarize the basic approaches proposed thus far concerning the development of public health ethics by describing and comparing the various ideas in the literature. With this in mind, an extensive list of references is provided. PMID:20195441

Petrini, Carlo

2010-01-01

3

Structuring Agricultural Education Research using Conceptual and Theoretical Frameworks.  

ERIC Educational Resources Information Center

Analysis of 348 articles from the Journal of Agricultural Education 1990-1999 showed that 83.3% used quantitative, applied survey research. Only 29% cited appropriate theoretical frameworks, 87% cited conceptual frameworks. They often cited limited references in establishing a framework and failed to relate findings to frameworks. (Contains 25…

Dyer, James E.; Haase-Wittler, Penny S.; Washburn, Shannon G.

2003-01-01

4

Aligning Product-Service Systems with Market Forces: A Theoretical Framework  

Microsoft Academic Search

The main purpose of the paper is to propose a theoretic framework aligning product-service systems (PSS) with market forces which manufacturing firms encounter, by which they can adopt the right PSS strategy to gain competitive advantage. The framework is presented based on literature review and multiple cases are then employed to verify the framework. It reveals that five different types

Xiucheng Fan; Hui Zhang

2010-01-01

5

Epistemologically authentic inquiry in schools: A theoretical framework for evaluating inquiry tasks  

Microsoft Academic Search

A main goal of science education is to help students learn to reason scien- tifically. A main way to facilitate learning is to engage students in inquiry activities such as conducting experiments. This article presents a theoretical framework for evaluating inquiry tasks in terms of how similar they are to authentic science. The framework helps identify the respects in which

Clark A. Chinn; Betina A. Malhotra

2002-01-01

6

New Theoretical Frameworks for Interferometric Imaging  

NASA Astrophysics Data System (ADS)

With the advent of new instruments (MIRC-6T at CHARA, PIONEER at VLTI, and VISION at NPOI) as well as the construction of MROI, the focus in optical and infrared interferometry has shifted toward imaging. However, examining the current “model-independent” image reconstruction packages proves they are often inadequate to reconstruct even simple objects. We present here two possible paths that are being explored to improve the quality of image reconstruction. The first is the Compressed Sensing framework, which prescribes the use of spatial bases in which the object is sparse. The second is the Bayesian evidence framework, which allows to discrimination between physical models in imaging. We illustrate the application of both frameworks with reconstruction of a simulated spotted star.

Baron, F.; Monnier, J.; Young, J.; Buscher, D.

2014-09-01

7

Bayesian Decision Theoretical Framework for Clustering  

ERIC Educational Resources Information Center

In this thesis, we establish a novel probabilistic framework for the data clustering problem from the perspective of Bayesian decision theory. The Bayesian decision theory view justifies the important questions: what is a cluster and what a clustering algorithm should optimize. We prove that the spectral clustering (to be specific, the…

Chen, Mo

2011-01-01

8

An integrative theoretical framework of acculturation and salutogenesis.  

PubMed

During the last two decades, the number of international migrants worldwide has constantly risen. In this context, cross-cultural dimensions of psychological disorders receive increased attention, especially depression, anxiety and post-traumatic stress disorders among the migrant population. In this paper we propose a theoretical framework for the understanding of migrant mental health. This framework combines elements from Berry's acculturation model and Antonovsky's salutogenic theory. The former illustrates the main factors that affect an individual's adaptation in a new cultural context. The term acculturative stress denotes unresolved problems resulting from intercultural contact that cannot be overcome easily by simply adjusting or assimilating. The latter specifies the relationship between culturally associated stress and mental health more distinctive, introducing the concepts of generalized resistance resources and sense of coherence that determine mental health outcomes of migrants during acculturative stress periods. Specifically, we provide an integrative framework of acculturation and salutogenesis that helps to integrate inconsistent findings in the migrant mental health literature. The current paper focuses on the effect of resource factors for positive mental health outcomes in the migrant population and summarises some implications for future research activities. PMID:22272594

Riedel, Jeannette; Wiesmann, Ulrich; Hannich, Hans-Joachim

2011-12-01

9

A Theoretical Framework for Contextual Science Teaching  

ERIC Educational Resources Information Center

The contextual approach to teaching is generally recognized as a reasonable and desirable strategy to enhance student learning in science. Using several cognitive and learning theories together with various philosophical considerations, I identify five distinct contexts that are important in engaging learners: the theoretical, practical, social,…

Klassen, Stephen

2006-01-01

10

EDUCATIONAL CARTOGRAPHY: MAPPING A THEORETICAL FRAMEWORK  

Microsoft Academic Search

Although school atlases represent a major sector in cartographic publishing, we know little about how these materials are developed. This is partly because the number of people directly involved in research and development worldwide is relatively small, partly because commercial competition has generally stifled debate and partly because theoretical perspectives on map design for young people remain underdeveloped. Although the

Patrick Wiegand

11

A Theoretical Framework for Contextual Science Teaching  

Microsoft Academic Search

The contextual approach to teaching is generally recognized as a reasonable and desirable strategy to enhance student learning\\u000a in science. Using several cognitive and learning theories together with various philosophical considerations, I identify five\\u000a distinct contexts that are important in engaging learners: the theoretical, practical, social, historical, and affective.\\u000a Based on these five contexts, I construct a model for teaching

Stephen Klassen

2006-01-01

12

Responsive space: Concept analysis and theoretical framework  

NASA Astrophysics Data System (ADS)

Customers' needs are dynamic and evolve in response to unfolding environmental uncertainties. The ability of a company or an industry to address these changing customers' needs in a timely and cost-effective way is a measure of its responsiveness. In the space industry, a systemic discrepancy exists between the time constants associated with the change of customers' needs, and the response time of the industry in delivering on-orbit solutions to these needs. There are important penalties associated with such delays, and space responsiveness is recognized as a strategic imperative in commercial competitive and military environments. In this paper, we provide a critical assessment of the literature on responsive space and introduce a new multi-disciplinary framework for thinking about and addressing issues of space responsiveness. Our framework advocates three levels of responsiveness: a global industry-wide responsiveness, a local stakeholder responsiveness, and an interactive or inter-stakeholder responsiveness. We introduce and motivate the use of "responsiveness maps" for multiple stakeholders. We then identify "levers of responsiveness": technical spacecraft- and launch-centric, as well as "soft" levers (e.g., acquisition policies) for improving the responsiveness of the space industry. Finally, we propose a series of research questions to aggressively tackle problems associated with space responsiveness.

Saleh, Joseph H.; Dubos, Gregory F.

2009-08-01

13

SEMIOTIC THEORETICAL FRAMEWORKS: CREATIVITY AND IMAGINATIVE RATIONALITY IN MATHEMATICS EDUCATION  

Microsoft Academic Search

The evolution of theoretical frameworks in mathemat ics education research is the broad umbrella under which this paper is situated. It is argued that because the field of mathematics education concerns people and their learning, every discipline relevant to humanity is germane to this research. There has been a movement to broaden the initial focus on psychology —as mathematics education

Norma Presmeg

14

Dialogue: A Theoretical Framework for Distance Education Instructional Systems  

ERIC Educational Resources Information Center

This paper presents a theoretical framework for viewing elements that comprise distance education instructional systems in terms of dialogue. It is assumed that learning is mediated by intrapersonal dialogue and facilitated by interpersonal dialogue. Every resource in a distance education instructional system (eg, instructor availability,…

Gorsky, Paul; Caspi, Avner

2005-01-01

15

Internet Use and Cognitive Development: A Theoretical Framework  

ERIC Educational Resources Information Center

The number of children and adolescents accessing the Internet as well as the amount of time online are steadily increasing. The most common online activities include playing video games, accessing web sites, and communicating via chat rooms, email, and instant messaging. A theoretical framework for understanding the effects of Internet use on…

Johnson, Genevieve

2006-01-01

16

A Theoretical Framework towards Understanding of Emotional and Behavioural Difficulties  

ERIC Educational Resources Information Center

Children's emotional and behavioural difficulties are the result of multiple individual, social and contextual factors working in concert. The current paper proposes a theoretical framework to interpret students' emotional and behavioural difficulties in schools, by taking into consideration teacher-student relationships, students'…

Poulou, Maria S.

2014-01-01

17

Educational Communities of Inquiry: Theoretical Framework, Research and Practice  

ERIC Educational Resources Information Center

Communications technologies have been continuously integrated into learning and training environments which has revealed the need for a clear understanding of the process. The Community of Inquiry (COI) Theoretical Framework has a philosophical foundation which provides planned guidelines and principles to development useful learning environments…

Akyol, Zehra; Garrison, D. Randy

2013-01-01

18

Structuring Agricultural Education Research Using Conceptual and Theoretical Frameworks.  

ERIC Educational Resources Information Center

The purpose of this study was to examine the degree to which agricultural education research has adhered to a structured approach over the past decade. Specifically, the study sought to determine the types of research conducted in agricultural education, the extent to which researchers used conceptual and theoretical frameworks, the extent to…

Dyer, James E.; Wittler, Penny S. Haase; Washburn, Shannon

19

A Theoretical Empowerment Framework for Transdisciplinary Team Building  

Microsoft Academic Search

Social workers seeking to address the relative disadvantage experienced by Indigenous Australians frequently find themselves working with complex social realities, including working in transdisciplinary teams with people of differing cultural backgrounds, values, and levels of education. Managing these complexities is critical to change, yet can be difficult to achieve. Theoretical frameworks can be used as tools to help the practitioner

Mary Whiteside; Komla Tsey; Yvonne Cadet-James

2011-01-01

20

Activity Theoretical Framework for Wiki-Based Collaborative Content Creation  

Microsoft Academic Search

Most recently, the use of collaboration element within information behavior research namely Collaborative Information Behavior (CIB) has been increasing. In addition, the success of wiki-based, large-scale, open collaborative content creation systems such as Wikipedia has aroused increasing interests of studies on their collaborative model. In contrast to previous related work, this paper focuses on an integrated theoretical framework of collaborative

Weiwei Zhang; Xiaodong Zhu

2010-01-01

21

A Theoretical Framework for Narrative Explanation in Science  

ERIC Educational Resources Information Center

This paper deals with a number of conceptual and theoretical issues that underlie the proposal to employ narrative explanations in science education: What is narrative? What is explanation? and What is narrative explanation? In answering these questions, we develop a framework of narrative elements and characteristics of narrative explanations.…

Norris, Stephen P.; Guilbert, Sandra M.; Smith, Martha L.; Hakimelahi, Shahram; Phillips, Linda M.

2005-01-01

22

Regulatory framework in assisted reproductive technologies, relevance and main issues.  

PubMed

Assisted reproductive technologies (ART) have changed life for the past 25 years and many ethical and social issues have emerged following this new method of conception. In order to protect individuals against scientific and ethical abuses without inhibiting scientific progress, a specific legal framework is necessary. The first French law on Bioethics was voted after an extensive debate in 1994 then reviewed in 2004. This review previously scheduled every five years is currently being discussed. Legal provisions applying to ART are part of a large framework including the protection of the patients' rights and biomedical research. The key principles consist of respect for human life and ban on commercial practices of human body parts, eugenic practices and any kind of cloning. These key principles apply to ART. Donation is anonymous and free. Created in 2004, the Agence de la biomédecine is a government agency and one of the main tools of the French regulations. The missions focus on improving the quality and the safety of the management of ART. Evaluation of activities is available to all from the annual report. The agency represents the French competent authority for medical and scientific aspects of ART. Substantial differences in European legislations exist from the open-up "laissez faire" to the most restrictive one. As a consequence a large reproductive tourism has developed particularly for egg donation or surrogacy. The medical and ethical conditions of management of patients and donors represent the main critical points. In order to avoid ethical abuses, homogenization regarding the key principles is necessary in Europe. It is an opportunity to reassert that human body parts should not be a source of financial gain. PMID:20067901

Merlet, Françoise

2009-01-01

23

Levels of racism: a theoretic framework and a gardener's tale.  

PubMed

The author presents a theoretic framework for understanding racism on 3 levels: institutionalized, personally mediated, and internalized. This framework is useful for raising new hypotheses about the basis of race-associated differences in health outcomes, as well as for designing effective interventions to eliminate those differences. She then presents an allegory about a gardener with 2 flower boxes, rich and poor soil, and red and pink flowers. This allegory illustrates the relationship between the 3 levels of racism and may guide our thinking about how to intervene to mitigate the impacts of racism on health. It may also serve as a tool for starting a national conversation on racism. PMID:10936998

Jones, C P

2000-08-01

24

A theoretical framework for physics education research: Modeling student thinking  

NSDL National Science Digital Library

Education is a goal-oriented field. But if we want to treat education scientifically so we can accumulate, evaluate, and refine what we learn, then we must develop a theoretical framework that is strongly rooted in objective observations and through which different theoretical models of student thinking can be compared. Much that is known in the behavioral sciences is robust and observationally based. In this paper, I draw from a variety of fields ranging from neuroscience to sociolinguistics to propose an over-arching theoretical framework that allows us to both make sense of what we see in the classroom and to compare a variety of specific theoretical approaches. My synthesis is organized around an analysis of the individual's cognition and how it interacts with the environment. This leads to a two level system, a knowledge-structure level where associational patterns dominate, and a control-structure level where one can describe expectations and epistemology. For each level, I sketch some plausible starting models for student thinking and learning in physics and give examples of how a theoretical orientation can affect instruction and research.

Redish, Edward F.

2010-02-16

25

Toward a theoretical framework for trustworthy cyber sensing  

NASA Astrophysics Data System (ADS)

Cyberspace is an indispensable part of the economy and society, but has been "polluted" with many compromised computers that can be abused to launch further attacks against the others. Since it is likely that there always are compromised computers, it is important to be aware of the (dynamic) cyber security-related situation, which is however challenging because cyberspace is an extremely large-scale complex system. Our project aims to investigate a theoretical framework for trustworthy cyber sensing. With the perspective of treating cyberspace as a large-scale complex system, the core question we aim to address is: What would be a competent theoretical (mathematical and algorithmic) framework for designing, analyzing, deploying, managing, and adapting cyber sensor systems so as to provide trustworthy information or input to the higher layer of cyber situation-awareness management, even in the presence of sophisticated malicious attacks against the cyber sensor systems?

Xu, Shouhuai

2010-04-01

26

A Universal Operator Theoretic Framework for Quantum Fault Tolerance  

E-print Network

In this paper we introduce a universal operator theoretic framework for quantum fault tolerance. This incorporates a top-down approach that implements a system-level criterion based on specification of the full system dynamics, applied at every level of error correction concatenation. This leads to more accurate determinations of error thresholds than could previously be obtained. The basis for the approach is the Quantum Computer Condition (QCC), an inequality governing the evolution of a quantum computer. In addition to more accurate determination of error threshold values, we show that the QCC provides a means to systematically determine optimality (or non-optimality) of different choices of error correction coding and error avoidance strategies. This is possible because, as we show, all known coding schemes are actually special cases of the QCC. We demonstrate this by introducing a new, operator theoretic form of entanglement assisted quantum error correction, which incorporates as special cases all known...

Gilbert, Gerald; Weinstein, Yaakov S; Aggarwal, Vaneet; Calderbank, A Robert

2007-01-01

27

A Universal Operator Theoretic Framework for Quantum Fault Tolerance.  

NASA Astrophysics Data System (ADS)

We introduce a universal operator theoretic framework for quantum fault tolerance. This incorporates a top-down approach that implements a system-level criterion based on specification of the full system dynamics, applied at every level of error correction concatenation. This leads to more accurate determinations of error thresholds than could previously be obtained. The basis for the approach is the Quantum Computer Condition (QCC), an inequality governing the evolution of a quantum computer. In addition to more accurate determination of error threshold values, we show that the QCC provides a means to systematically determine optimality (or non-optimality) of different choices of error correction coding and error avoidance strategies. This is possible because, as we show, all known coding schemes are actually special cases of the QCC. We demonstrate this by introducing a new, operator theoretic form of entanglement assisted quantum error correction.

Gilbert, Gerald; Calderbank, Robert; Aggarwal, Vaneet; Hamrick, Michael; Weinstein, Yaakov

2008-03-01

28

A Universal Operator Theoretic Framework for Quantum Fault Tolerance  

E-print Network

In this paper we introduce a universal operator theoretic framework for quantum fault tolerance. This incorporates a top-down approach that implements a system-level criterion based on specification of the full system dynamics, applied at every level of error correction concatenation. This leads to more accurate determinations of error thresholds than could previously be obtained. This is demonstrated both formally and with an explicit numerical example. The basis for our approach is the Quantum Computer Condition (QCC), an inequality governing the evolution of a quantum computer. We show that all known coding schemes are actually special cases of the QCC. We demonstrate this by introducing a new, operator theoretic form of entanglement assisted quantum error correction, which incorporates as special cases all known error correcting protocols, and is itself a special case of the QCC.

Gerald Gilbert; Michael Hamrick; Yaakov S. Weinstein; Vaneet Aggarwal; A. Robert Calderbank

2007-09-02

29

Choosing a theoretical framework to guide HESI exit examination research.  

PubMed

This article responds to issues raised in 2004 by Spurlock and Hanks, who interpreted data that were presented in four published studies describing the validity of the Health Education Systems, Inc. (HESI) Exit Examination. The argument for using classical testing theory as the preferred theoretical framework to a clinical disease detection model is advanced. While the Spurlock and Hanks article promotes a philosophical bias against the establishment of progression policies within schools of nursing, this article offers another assessment of the merits of detecting at-risk students so timely remediation can occur prior to administration of the National Council Licensure Examination for Registered Nurses (NCLEX-RN). From data presented in the four validity studies, the HESI Exit Examination was reported to be 96.36% to 98.30% accurate in predicting NCLEX-RN success, and those original findings are reaffirmed. PMID:16915987

Nibert, Ainslie T; Adamson, Carolyn; Young, Anne; Lauchner, Kathryn A; Britt, Robin B; Hinds, Mary Newman

2006-08-01

30

Development of a theoretical framework for analyzing cerebrospinal fluid dynamics  

PubMed Central

Background To date hydrocephalus researchers acknowledge the need for rigorous but utilitarian fluid mechanics understanding and methodologies in studying normal and hydrocephalic intracranial dynamics. Pressure volume models and electric circuit analogs introduced pressure into volume conservation; but control volume analysis enforces independent conditions on pressure and volume. Previously, utilization of clinical measurements has been limited to understanding of the relative amplitude and timing of flow, volume and pressure waveforms; qualitative approaches without a clear framework for meaningful quantitative comparison. Methods Control volume analysis is presented to introduce the reader to the theoretical background of this foundational fluid mechanics technique for application to general control volumes. This approach is able to directly incorporate the diverse measurements obtained by clinicians to better elucidate intracranial dynamics and progression to disorder. Results Several examples of meaningful intracranial control volumes and the particular measurement sets needed for the analysis are discussed. Conclusion Control volume analysis provides a framework to guide the type and location of measurements and also a way to interpret the resulting data within a fundamental fluid physics analysis. PMID:19772652

Cohen, Benjamin; Voorhees, Abram; Vedel, S?ren; Wei, Timothy

2009-01-01

31

Learning to trust in organisational complexity – A theoretical framework of complexity leadership and collaborative community theories.  

E-print Network

??The following study proposes and evaluates a model for conducting organisational analyses, based on a theoretical framework combining the complexity leadership and collaborative community theories.… (more)

Stiles, Elinor

2012-01-01

32

Developing a Theoretical Framework for Faculty Planning and Collaboration.  

ERIC Educational Resources Information Center

The College of Education at the University of Cincinnati agreed to examine its teacher education programs and initiate program changes within the broad framework provided by the Holmes initiatives. Those involved began by developing a conceptual framework for pursuing planning and implementation efforts in the college. Rather than proposing a…

Soled, Suzanne Wegener; Yinger, Robert J.

33

A Theoretical Framework for the Studio as a Learning Environment  

ERIC Educational Resources Information Center

In this article we describe a holistic, ecological framework that takes into account the surface structures and pedagogical approaches in the studio and how these elements are connected to the construction of design knowledge: epistemology. In our development of this framework, we came to understand how disciplinary underpinnings and academic…

Brandt, Carol B.; Cennamo, Katherine; Douglas, Sarah; Vernon, Mitzi; McGrath, Margarita; Reimer, Yolanda

2013-01-01

34

Towards an Information-Theoretic Framework for Analyzing Intrusion Detection Systems  

Microsoft Academic Search

IDS research still needs to strengthen mathematical foundations and theoretic guidelines. In this paper, we build a formal framework, based on information theory, for analyzing and quantifying the effectiveness of an IDS. We firstly present a formal IDS model, then analyze it following an information- theoretic approach. Thus, we propose a set of information-theoretic metrics that can quantitatively measure the

Guofei Gu; Prahlad Fogla; David Dagon; Wenke Lee; Boris Skoric

2006-01-01

35

APPLYING A THEORETICAL FRAMEWORK TO THE RESEARCH AND DESIGN OF MEDICAL ERROR REPORTING SYSTEMS  

Microsoft Academic Search

Patient safety research is largely atheoretical. The failure to apply extant theory or generate new theoretical perspectives is especially evident in the literature on medical incident\\/error reporting, but this does not have to be so in the future. To encourage a more theoretical bearing of error reporting (and other patient safety) research, we demonstrate the effectiveness of a theoretical framework

Richard J. Holden; Ben-Tzion Karsh

36

A Framework for Theoretical Analysis of Content Fingerprinting  

E-print Network

the system and allow suitable counter-attack strategies to be devised. While theoretical studies have been identify weaknesses of fingerprinting systems that may be exploited by smart attackers to circumvent

Wu, Min

37

An in-depth analysis of theoretical frameworks for the study of care coordination1  

PubMed Central

Introduction Complex chronic conditions often require long-term care from various healthcare professionals. Thus, maintaining quality care requires care coordination. Concepts for the study of care coordination require clarification to develop, study and evaluate coordination strategies. In 2007, the Agency for Healthcare Research and Quality defined care coordination and proposed five theoretical frameworks for exploring care coordination. This study aimed to update current theoretical frameworks and clarify key concepts related to care coordination. Methods We performed a literature review to update existing theoretical frameworks. An in-depth analysis of these theoretical frameworks was conducted to formulate key concepts related to care coordination. Results Our literature review found seven previously unidentified theoretical frameworks for studying care coordination. The in-depth analysis identified fourteen key concepts that the theoretical frameworks addressed. These were ‘external factors’, ‘structure’, ‘tasks characteristics’, ‘cultural factors’, ‘knowledge and technology’, ‘need for coordination’, ‘administrative operational processes’, ‘exchange of information’, ‘goals’, ‘roles’, ‘quality of relationship’, ‘patient outcome’, ‘team outcome’, and ‘(inter)organizational outcome’. Conclusion These 14 interrelated key concepts provide a base to develop or choose a framework for studying care coordination. The relational coordination theory and the multi-level framework are interesting as these are the most comprehensive. PMID:23882171

Van Houdt, Sabine; Heyrman, Jan; Vanhaecht, Kris; Sermeus, Walter; De Lepeleire, Jan

2013-01-01

38

Validation of the theoretical domains framework for use in behaviour change and implementation research  

PubMed Central

Background An integrative theoretical framework, developed for cross-disciplinary implementation and other behaviour change research, has been applied across a wide range of clinical situations. This study tests the validity of this framework. Methods Validity was investigated by behavioural experts sorting 112 unique theoretical constructs using closed and open sort tasks. The extent of replication was tested by Discriminant Content Validation and Fuzzy Cluster Analysis. Results There was good support for a refinement of the framework comprising 14 domains of theoretical constructs (average silhouette value 0.29): ‘Knowledge’, ‘Skills’, ‘Social/Professional Role and Identity’, ‘Beliefs about Capabilities’, ‘Optimism’, ‘Beliefs about Consequences’, ‘Reinforcement’, ‘Intentions’, ‘Goals’, ‘Memory, Attention and Decision Processes’, ‘Environmental Context and Resources’, ‘Social Influences’, ‘Emotions’, and ‘Behavioural Regulation’. Conclusions The refined Theoretical Domains Framework has a strengthened empirical base and provides a method for theoretically assessing implementation problems, as well as professional and other health-related behaviours as a basis for intervention development. PMID:22530986

2012-01-01

39

An Indirect Reciprocity Game Theoretic Framework for Dynamic Spectrum Access  

E-print Network

reciprocity game is a new paradigm to stimulate cooperation among cognitive nodes. However, the framework (BS) by stimulating cooperation between primary users (PUs) and secondary users (SUs). We model the cooperation stimulation problem as an indirect reciprocity game, where SUs help PUs relay information and gain

Liu, K. J. Ray

40

An Information-Theoretic Framework for Understanding Saccadic Eye Movements  

E-print Network

representations in the process. This framework attempts to connect several psychological phenomena, such as pop is fundamentally a Bayesian inference process. Given the measurement by the retinas, the brain's memory of eye positions and its prior knowledge of the world, our brain has to make an inference about what is where

Yu, Stella X.

41

Proposing an Integrated Research Framework for Connectivism: Utilising Theoretical Synergies  

ERIC Educational Resources Information Center

Connectivism is receiving acknowledgement as a fresh way of conceptualising learning in the digital age. Thus, as a relatively new instructional framework, it is imperative that research on its applicability and effectiveness in a variety of educational contexts is advanced. In particular, a high premium should be placed on context-specific…

Boitshwarelo, Bopelo

2011-01-01

42

Immigrant Students' Experience of Schooling: A Narrative Inquiry Theoretical Framework  

ERIC Educational Resources Information Center

We explore immigrant students' experience of schooling focusing on Yang Yang and his family. We present insights into immigrant Chinese educational experience in Canada and bring forward a narrative-inquiry framework for the study of student experience. We find that--contrary to some of the expectations of Chinese immigrants--family relations,…

Xu, Shijing; Connelly, F. Michael; He, Ming Fang; Phillion, JoAnn

2007-01-01

43

A theoretical framework on proactive information exchange in agent teamwork  

Microsoft Academic Search

Proactive information delivery is critical to achieving efiective teamwork. However, existing theories do not adequately address proactive information delivery. This pa- per presents a formal framework for proactive information delivery in agent team- work. First, the concept of information need is introduced. Second, a new modal operator, InfoNeed is used to represent information needs. The properties of the InfoNeed operator

Xiaocong Fan; John Yen; Richard A. Volz

2005-01-01

44

Primary Teachers' Attitudes toward Science: A New Theoretical Framework  

ERIC Educational Resources Information Center

Attention to the attitudes of preservice and inservice primary teachers toward science is of fundamental importance to research on primary science education. However, progress in this field of research has been slow due to the poor definition and conceptualization of the construct of primary teachers' attitude toward science. This poor theoretical

van Aalderen-Smeets, Sandra I.; Walma van der Molen, Juliette H.; Asma, Lieke J. F.

2012-01-01

45

A theoretical framework for multiple neural network systems  

Microsoft Academic Search

Multiple neural network systems have become popular techniques for tackling complex tasks, often giving improved performance compared to single network systems. For example, modular systems can provide improvements in generalisation through task decomposition, whereas multiple classifier and regressor systems typically improve generalisation through the ensemble combination of redundant networks. Whilst there has been significant focus on understanding the theoretical properties

Mike W. Shields; Matthew C. Casey

2008-01-01

46

A Type-Theoretic Framework for Certified Model Transformations  

NASA Astrophysics Data System (ADS)

We present a framework based on the Calculus of Inductive Constructions (CIC) and its associated tool the Coq proof assistant to allow certification of model transformations in the context of Model-Driven Engineering (MDE). The approached is based on a semi-automatic translation process from metamodels, models and transformations of the MDE technical space into types, propositions and functions of the CIC technical space. We describe this translation and illustrate its use in a standard case study.

Calegari, Daniel; Luna, Carlos; Szasz, Nora; Tasistro, Álvaro

47

Theories of behaviour change synthesised into a set of theoretical groupings: introducing a thematic series on the theoretical domains framework  

PubMed Central

Behaviour change is key to increasing the uptake of evidence into healthcare practice. Designing behaviour-change interventions first requires problem analysis, ideally informed by theory. Yet the large number of partly overlapping theories of behaviour makes it difficult to select the most appropriate theory. The need for an overarching theoretical framework of behaviour change was addressed in research in which 128 explanatory constructs from 33 theories of behaviour were identified and grouped. The resulting Theoretical Domains Framework (TDF) appears to be a helpful basis for investigating implementation problems. Research groups in several countries have conducted TDF-based studies. It seems timely to bring together the experience of these teams in a thematic series to demonstrate further applications and to report key developments. This overview article describes the TDF, provides a brief critique of the framework, and introduces this thematic series. In a brief review to assess the extent of TDF-based research, we identified 133 papers that cite the framework. Of these, 17 used the TDF as the basis for empirical studies to explore health professionals’ behaviour. The identified papers provide evidence of the impact of the TDF on implementation research. Two major strengths of the framework are its theoretical coverage and its capacity to elicit beliefs that could signify key mediators of behaviour change. The TDF provides a useful conceptual basis for assessing implementation problems, designing interventions to enhance healthcare practice, and understanding behaviour-change processes. We discuss limitations and research challenges and introduce papers in this series. PMID:22531601

2012-01-01

48

A game theoretic framework for bandwidth allocation and pricing in broadband networks  

Microsoft Academic Search

In this paper, we present a game theoretic framework for bandwidth allocation for elastic services in high-speed net- works. The framework is based on the idea of the Nash bargaining solution from cooperative game theory, which not only provides the rate settings of users that are Pareto optimal from the point of view of the whole system, but are also

Haïkel Yaïche; Ravi R. Mazumdar; Catherine Rosenberg

2000-01-01

49

MOTIVATION IN THE ELDERLY: A THEORETICAL FRAMEWORK AND SOME PROMISING FINDINGS  

Microsoft Academic Search

Despite a widespread concern with the well-being of elderly people, very little is known about the motivation behind everyday behaviours in old age. In this paper a theoretical framework that has been found useful in research on young adults is suggested as a promising direction for research on the psychology of motivation in the elderly. This framework (Deci & Ryan,

ROBERT J. VALLERAND; BRIAN P. OCONNOR

1989-01-01

50

A Theoretical Framework to Foster Digital Literacy: The Case of Digital Learning Resources  

E-print Network

in DLRs design and evaluation. First, a literature review is undertaken to report on the state of research of this work is to use the literature, along with a case study, to develop a framework of critical elements in the field of DLRs. Second, a theoretical framework is developed based on the literature review. Then

Paris-Sud XI, Université de

51

A Theoretical Framework for Diagrams and Information Graphics in Research and Education.  

ERIC Educational Resources Information Center

Information graphics or diagrams are two-dimensional maps of relationships that present information. Creators and interpreters of diagrams need to know what makes some diagrams more effective in communicating information. This paper suggests a theoretical framework for diagram classification to make this possible. This framework consists of two…

Hardin, Pris

52

An Integrative Theoretical Framework for Understanding Sexual Motivation, Arousal, and Behavior  

Microsoft Academic Search

An integrative theoretical framework and model for understanding sexual motivation, arousal, and behavior is presented, combining the principles of incentive motivation theory and the hierarchical control of behavior. It is intended to stimulate discussion. The framework can serve as a “route map” in understanding the links between different component processes and their interactions, as well as the relations between different

Frederick Toates

2009-01-01

53

Towards a better theoretical framework for studying learning from educational television  

Microsoft Academic Search

Drawing in particular on Open University experience, this article attempts to set out a theoretical framework for understanding how people learn through television. The first part of the framework sets out the organisational factors which appear to influence learning from television. The other parts look at the different processes of coding information and meaning which are found in different media,

Anthony W. Bates

1980-01-01

54

Theoretical Limits of Hydrogen Storage in Metal-Organic Frameworks: Opportunities and Trade-Offs  

E-print Network

Theoretical Limits of Hydrogen Storage in Metal-Organic Frameworks: Opportunities and Trade predict the hydrogen storage properties of these compounds. Approximately 20 000 candidate compounds were excess H2 uptake and surface area, we predict the theoretical total hydrogen storage capacity

Cafarella, Michael J.

55

ADOPTION AND APPROPRIATION: TOWARDS A NEW THEORETICAL FRAMEWORK AN EXPLORATORY RESEARCH ON MOBILE TECHNOLOGIES IN FRENCH  

E-print Network

1 ADOPTION AND APPROPRIATION: TOWARDS A NEW THEORETICAL FRAMEWORK AN EXPLORATORY RESEARCH ON MOBILE for their comments. halshs-00155506,version1-18Jun2007 #12;2 ADOPTION AND APPROPRIATION: TOWARDS A NEW THEORETICAL. The pace of mobile phone adoption has been very high in the European Union (42% each year from 1995 to 2003

Paris-Sud XI, Université de

56

Towards developing a theoretical framework for measuring public sector managers' career success  

Microsoft Academic Search

Purpose – The purpose of this paper is to develop a theoretical framework for measuring public sector managers' career success. Design\\/methodology\\/approach – The theoretical foundation used in this study is social cognitive career theory. To conduct a literature search, several keywords were identified, i.e. career success, objective and subjective career success, managers, managerial career development and social cognitive career theory.

Roziah Mohd Rasdi; Maimunah Ismail; Jegak Uli; Sidek Mohd Noah

2009-01-01

57

A Computational Game-Theoretic Framework for Cryptography Joseph Y. Halpern  

E-print Network

develop a definition of protocol security relying on game-theoretic notions of implemen- tation. We showA Computational Game-Theoretic Framework for Cryptography Joseph Y. Halpern Cornell University definition of protocol security; this result shows that, when tak- ing computation into account, the two

Keinan, Alon

58

Use of Theoretical Frameworks as a Pragmatic Guide for Mixed Methods Studies: A Methodological Necessity?  

PubMed Central

There is a growing acceptance of the utility of mixed methods in health sciences but there is no widely accepted set of ideas in regard to use of a conceptual or theoretical framework to guide inquiry. Few mixed methods health science articles report the use of such a framework. Lack of available conceptual maps provided by theoretical frameworks, necessary intricacy of design, and the qualitative “black box” tradition all contribute to a dearth of methodological guidance in such studies. This article uses a funded National Institutes of Health study as an example to explain the utility of a theoretical framework in conceptualizing a study, making design decisions such as sampling and recruitment, collecting and analyzing data, and data interpretation. PMID:22368533

Evans, Bronwynne C.; Coon, David W.; Ume, Ebere

2011-01-01

59

A quantitative, theoretical framework for understanding mammalian sleep  

PubMed Central

Sleep is one of the most noticeable and widespread phenomena occurring in multicellular animals. Nevertheless, no consensus for a theory of its origins has emerged. In particular, no explicit, quantitative theory exists that elucidates or distinguishes between the myriad hypotheses proposed for sleep. Here, we develop a general, quantitative theory for mammalian sleep that relates many of its fundamental parameters to metabolic rate and body size. Several mechanisms suggested for the function of sleep can be placed in this framework, e.g., cellular repair of damage caused by metabolic processes as well as cortical reorganization to process sensory input. Our theory leads to predictions for sleep time, sleep cycle time, and rapid eye movement time as functions of body and brain mass, and it explains, for example, why mice sleep ?14 hours per day relative to the 3.5 hours per day that elephants sleep. Data for 96 species of mammals, spanning six orders of magnitude in body size, are consistent with these predictions and provide strong evidence that time scales for sleep are set by the brain's, not the whole-body, metabolic rate. PMID:17215372

Savage, Van M.; West, Geoffrey B.

2007-01-01

60

A theoretical framework for research into environmental education  

NASA Astrophysics Data System (ADS)

The essential question in environmental education is the individual's relationship to his environment, including both that part of his environment which is natural and that part which is man-made. The nature of this relationship is manifested in the way in which the individual acts with regard to his environment and by what choices and decisions he makes in order to come to terms with it. The crucial factors in these decisions are his values, which at the same time represent his cognitive, socio-emotional and ethical development. As an interdisciplinary subject, environmental education draws attention to the technique of examining matters from a variety of viewpoints. Since the consequences of man's decisions regarding his environment are apparent both in the sphere of human life and in the world of nature, these decisions involve ecological and economic, social, political, aesthetic and ethical considerations. Environmental education contains both cognitive and affective aspects, the association between which is examined on the basis of the theoretical premises established in this paper.

Aho, Leena

1984-06-01

61

Theoretical Framework  

Microsoft Academic Search

\\u000a The purpose of this chapter is to discuss the basic characteristics of consulting services, consulting firms (CFs), market\\u000a structure and clients, and what these characteristics imply for the consulting sector and the behavior of CFs. As will be\\u000a seen, no single characteristic of the consulting sector is unique, but the combined characteristics make this sector unique.\\u000a The role and consequences

Roger Svensson

62

A Test for Theoretical Integration: Systems Theory Framework and Dialogical Self  

ERIC Educational Resources Information Center

The Systems Theory Framework (STF) is presented as an integrating and organising concept for the predominant theories of career. In order to test the integrative capacity of the STF, this research merges the STF's theoretical element of story with the Theory of Dialogical Self's model of personality. Implications for the practice of career…

McIlveen, Peter

2007-01-01

63

Variation Theory: A Theory of Learning and a Useful Theoretical Framework for Chemical Education Research  

ERIC Educational Resources Information Center

Instructors are constantly baffled by the fact that two students who are sitting in the same class, who have access to the same materials, can come to understand a particular chemistry concept differently. Variation theory offers a theoretical framework from which to explore possible variations in experience and the resulting differences in…

Bussey, Thomas J.; Orgill, MaryKay; Crippen, Kent J.

2013-01-01

64

Proverbs as Theoretical Frameworks for Lifelong Learning in Indigenous African Education  

ERIC Educational Resources Information Center

Every aspect of a community's life and values in indigenous Africa provide the theoretical framework for education. The holistic worldview of the traditional system places a strong emphasis on the centrality of the human element and orature in the symmetrical relationship between life and learning. This article focuses on proverbs and the…

Avoseh, Mejai B. M.

2013-01-01

65

Analysing Theoretical Frameworks of Moral Education through Lakatos's Philosophy of Science  

ERIC Educational Resources Information Center

The structure of studies of moral education is basically interdisciplinary; it includes moral philosophy, psychology, and educational research. This article systematically analyses the structure of studies of moral educational from the vantage points of philosophy of science. Among the various theoretical frameworks in the field of philosophy of…

Han, Hyemin

2014-01-01

66

A theoretical framework for specificity in cell signaling Natalia L Komarova1,2,  

E-print Network

REPORT A theoretical framework for specificity in cell signaling Natalia L Komarova1,2, *, Xiufen; scaffold; signal transduction Introduction Cells sense and respond to a wide variety of chemical messages unsolved problem in cell biology is to understand how specificity from signal to cellular response

Nie, Qing

67

Sharpening Thermal Imageries: A Generalized Theoretical Framework From an Assimilation Perspective  

Microsoft Academic Search

Land surface temperature (LST) plays an important role in many fields. However, thermal bands in prevailing sensors that are onboard satellites have limited spatial resolutions, which seriously impede their potential applications. Many approaches that aim to downscale thermal imageries to finer spatial resolution levels have been developed in recent years. This paper managed to construct a Generalized Theoretical Framework from

Wenfeng Zhan; Yunhao Chen; Ji Zhou; Jing Li; Wenyu Liu

2011-01-01

68

Understanding the Role of Numeracy in Health: Proposed Theoretical Framework and Practical Insights  

ERIC Educational Resources Information Center

Numeracy--that is, how facile people are with mathematical concepts and their applications--is gaining importance in medical decision making and risk communication. This article proposes six critical functions of health numeracy. These functions are integrated into a theoretical framework on health numeracy that has implications for risk…

Lipkus, Isaac M.; Peters, Ellen

2009-01-01

69

A Theoretical Framework for Organizing the Effect of the Internet on Cognitive Development  

ERIC Educational Resources Information Center

The number of children and adolescents accessing the Internet as well as the amount of time online are steadily increasing. The most common online activities include playing video games, navigating web sites, and communicating via chat rooms, email, and instant messaging. A theoretical framework for understanding the effects of Internet use on…

Johnson, Genevieve Marie

2006-01-01

70

Proposing a Theoretical Framework for Digital Age Youth Information Behavior Building upon Radical Change Theory  

Microsoft Academic Search

Contemporary young people are engaged in a variety of information behaviors, such as information seeking, using, sharing, and creating. The ways youth interact with information have transformed in the shifting digital information environment; however, relatively little empirical research exists and no theoretical framework adequately explains digital age youth information behaviors from a holistic perspective. In order to bridge the empirical

Kyungwon Koh

2011-01-01

71

A Study of the Model of Mastery as a Theoretical Framework for Coaching Teachers Writing Workshop  

ERIC Educational Resources Information Center

The study investigated a coach's use of a theoretical framework called the Model of Mastery to assist three teachers in becoming self-regulated in the teaching of writing workshop by moving them through three settings: acquisition, consolidation, and consultation. The goal of the coach was to assist teachers in developing expertise in procedural,…

Kimbrell, Jennifer L.

2010-01-01

72

A theoretical framework to describe communication processes during medical disability assessment interviews  

Microsoft Academic Search

BACKGROUND: Research in different fields of medicine suggests that communication is important in physician-patient encounters and influences satisfaction with these encounters. It is argued that this also applies to the non-curative tasks that physicians perform, such as sickness certification and medical disability assessments. However, there is no conceptualised theoretical framework that can be used to describe intentions with regard to

H Jolanda van Rijssen; Antonius JM Schellart; Johannes R Anema; Allard J van der Beek

2009-01-01

73

A Decision Theoretic Framework for Analyzing Binary Hash-based Content Identification Systems  

E-print Network

A Decision Theoretic Framework for Analyzing Binary Hash-based Content Identification Systems-based identification systems is that a large volume of legacy multimedia content does not have any embedded watermarks University of Maryland College Park, MD, USA minwu@umd.edu ABSTRACT Content identification has many

Wu, Min

74

Majoring in fashion: a theoretical framework for understanding the decision-making process  

Microsoft Academic Search

Choosing a college major can be a complex decision and one that has the potential to determine an individual's professional future. The purpose of this study was to develop a theoretical framework for mapping the decision-making process. Grounded in findings from a previously published study of interviews with students majoring in fashion and the existing literature on the process of

Nancy Hodges; Elena Karpova

2010-01-01

75

In Search of Theoretical Framework: A Case Study of Chinese Mothers' Experiences in Immigration and Education  

ERIC Educational Resources Information Center

This paper seeks to develop a theoretical framework that is applicable to research on recent immigrant Chinese mothers in the United States. Although Black, Chicana, and transnational feminist epistemologies exist in previous scholarship, there is no comparable discourse in the study of Chinese mothers' experiences in the United States. In this…

Chen, Shujun

2010-01-01

76

A GAME THEORETIC FRAMEWORK FOR COLLUDER-DETECTOR BEHAVIOR W. Sabrina Lin  

E-print Network

of this game. We show simulation results in Section 5, and conclusions are drawn in Section 6. 2. SYSTEM MODELA GAME THEORETIC FRAMEWORK FOR COLLUDER-DETECTOR BEHAVIOR FORENSICS W. Sabrina Lin , H. Vicky Zhao of Alberta, Edmonton, AB T6G 2V4 Canada ABSTRACT Digital ngerprinting is an emerging technology in media secu

Liu, K. J. Ray

77

A THEORETICAL AND COMPUTATIONAL FRAMEWORK FOR ISOMETRY INVARIANT RECOGNITION OF POINT CLOUD DATA  

E-print Network

A THEORETICAL AND COMPUTATIONAL FRAMEWORK FOR ISOMETRY INVARIANT RECOGNITION OF POINT CLOUD DATA; # ########### ### ############# ######### ### ######## ######### ########### ## ##### ##### #### Facundo M#19;emoli # Guillermo Sapiro # ######## Point clouds are one of the most primitive and fundamental manifold representations. A popular source of point clouds are three dimensional shape acquisition

78

Towards an Information Theoretic Framework for Location-Based Data Linkage  

E-print Network

Towards an Information Theoretic Framework for Location-Based Data Linkage Bradley Malin databases. Traditional research into record linkage has concentrated on string comparator metrics distributed data can be related through location-based linkage algorithms, which link patterns in location

79

Towards an Information Theoretic Framework for LocationBased Data Linkage  

E-print Network

Towards an Information Theoretic Framework for Location­Based Data Linkage Bradley Malin databases. Traditional research into record linkage has concentrated on string comparator metrics distributed data can be related through location­based linkage algorithms, which link patterns in location

80

Innovation value chain capability in Malaysian-owned company: A theoretical framework  

NASA Astrophysics Data System (ADS)

Good quality products or services are no longer adequate to guarantee the sustainability of a company in the present competitive business. Prior research has developed various innovation models with the hope to better understand the innovativeness of the company. Due to countless definitions, indicators, factors, parameter and approaches in the study of innovation, it is difficult to ensure which one will best suit the Malaysian-owned company innovativeness. This paper aims to provide a theoretical background to support the framework of the innovation value chain capability in Malaysian-owned Company. The theoretical framework was based on the literature reviews, expert interviews and focus group study. The framework will be used to predict and assess the innovation value chain capability in Malaysian-owned company.

Abidin, Norkisme Zainal; Suradi, Nur Riza Mohd

2014-09-01

81

Intellect: a theoretical framework for personality traits related to intellectual achievements.  

PubMed

The present article develops a theoretical framework for the structure of personality traits related to intellectual achievements. We postulate a 2-dimensional model, differentiating between 2 processes (Seek and Conquer) and 3 operations (Think, Learn, and Create). The framework was operationalized by a newly developed measure, which was validated based on 2 samples. Subsequently, in 3 studies (overall N = 1,478), the 2-dimensional structure of the Intellect framework was generally supported. Additionally, subdimensions of the Intellect framework specifically predicted conceptually related criteria, including scholastic performance, vocational interest, and leisure activities. Furthermore, results from multidimensional scaling and higher order confirmatory factor analyses show that the framework allows for the incorporation of several constructs that have been proposed on different theoretical backgrounds, such as need for cognition, typical intellectual engagement, curiosity, intrinsic motivation, goal orientation, and openness to ideas. It is concluded that based on the Intellect framework, these constructs, which have been researched separately in the literature, can be meaningfully integrated. PMID:23527846

Mussel, Patrick

2013-05-01

82

Obesity in sub-Saharan Africa: development of an ecological theoretical framework.  

PubMed

The prevalence of overweight and obesity is increasing in sub-Saharan Africa (SSA). There is a need for theoretical frameworks to catalyze further research and to inform the development of multi-level, context-appropriate interventions. In this commentary, we propose a preliminary ecological theoretical framework to conceptualize factors that contribute to increases in overweight and obesity in SSA. The framework is based on a Causality Continuum model [Coreil et al. Social and Behavioral Foundations of Public Health. Sage Publications, Thousand Oaks] that considers distant, intermediate and proximate influences. The influences incorporated in the model include globalization and urbanization as distant factors; occupation, social relationships, built environment and cultural perceptions of weight as intermediate factors and caloric intake, physical inactivity and genetics as proximate factors. The model illustrates the interaction of factors along a continuum, from the individual to the global marketplace, in shaping trends in overweight and obesity in SSA. The framework will be presented, each influence elucidated and implications for research and intervention development discussed. There is a tremendous need for further research on obesity in SSA. An improved evidence base will serve to validate and develop the proposed framework further. PMID:22933446

Scott, Alison; Ejikeme, Chinwe Stella; Clottey, Emmanuel Nii; Thomas, Joy Goens

2013-03-01

83

Theoretical framework research of open-ended project-based instruction  

Microsoft Academic Search

Open-ended project-based instruction is a theory and practice model to deepen project-based instruction. The paper proposed open-ended project-based instruction model based on theories of constructivism and multiple intelligences. And theoretical framework has been summarized: two centers, three basic conditions and four key processes. The steps about project selection, team composition, and process management have been analyzed actively. This will promote

Lin Xuefen; Cen Gang

2010-01-01

84

Praxis and reflexivity for interprofessional education: towards an inclusive theoretical framework for learning.  

PubMed

While there is growing evidence of theoretical perspectives adopted in interprofessional education, learning theories tend to foreground the individual, focusing on psycho-social aspects of individual differences and professional identity to the detriment of considering social-structural factors at work in social practices. Conversely socially situated practice is criticised for being context-specific, making it difficult to draw generalisable conclusions for improving interprofessional education. This article builds on a theoretical framework derived from earlier research, drawing on the dynamics of Dewey's experiential learning theory and Archer's critical realist social theory, to make a case for a meta-theoretical framework enabling social-constructivist and situated learning theories to be interlinked and integrated through praxis and reflexivity. Our current analysis is grounded in an interprofessional curriculum initiative mediated by a virtual community peopled by health and social care users. Student perceptions, captured through quantitative and qualitative data, suggest three major disruptive themes, creating opportunities for congruence and disjuncture and generating a model of zones of interlinked praxis associated with professional differences and identity, pedagogic strategies and technology-mediated approaches. This model contributes to a framework for understanding the complexity of interprofessional learning and offers bridges between individual and structural factors for engaging with the enablements and constraints at work in communities of practice and networks for interprofessional education. PMID:23679676

Hutchings, Maggie; Scammell, Janet; Quinney, Anne

2013-09-01

85

Towards a theoretical framework for the comparative understanding of globalisation, higher education, the labour market and inequality  

Microsoft Academic Search

This paper is a theoretical examination of three major empirical trends that affect many people: globalisation, increasingly close relations between higher education (HE) and labour markets, and increasing social inequality. Its aim is to identify key theoretical resources and their contribution to the development of a comparative theoretical framework for understanding countries' responses to globalisation with respect to HE and

Antonia Kupfer

2011-01-01

86

A second gradient theoretical framework for hierarchical multiscale modeling of materials  

SciTech Connect

A theoretical framework for the hierarchical multiscale modeling of inelastic response of heterogeneous materials has been presented. Within this multiscale framework, the second gradient is used as a non local kinematic link between the response of a material point at the coarse scale and the response of a neighborhood of material points at the fine scale. Kinematic consistency between these scales results in specific requirements for constraints on the fluctuation field. The wryness tensor serves as a second-order measure of strain. The nature of the second-order strain induces anti-symmetry in the first order stress at the coarse scale. The multiscale ISV constitutive theory is couched in the coarse scale intermediate configuration, from which an important new concept in scale transitions emerges, namely scale invariance of dissipation. Finally, a strategy for developing meaningful kinematic ISVs and the proper free energy functions and evolution kinetics is presented.

Luscher, Darby J [Los Alamos National Laboratory; Bronkhorst, Curt A [Los Alamos National Laboratory; Mc Dowell, David L [GEORGIA TECH

2009-01-01

87

Gaming the System: Video Games as a Theoretical Framework for Instructional Design  

E-print Network

In order to facilitate analyzing video games as learning systems and instructional designs as games, we present a theoretical framework that integrates ideas from a broad range of literature. The framework describes games in terms of four layers, all sharing similar structural elements and dynamics: a micro-level game focused on immediate problem-solving and skill development, a macro-level game focused on the experience of the game world and story and identity development, and two meta-level games focused on building or modifying the game and on social interactions around it. Each layer casts gameplay as a co-construction of the game and the player, and contains three dynamical feedback loops: an exploratory learning loop, an intrinsic motivation loop, and an identity loop.

Beatty, Ian D

2014-01-01

88

Very Long (> 48 hours) Shifts and Cardiovascular Strain in Firefighters: a Theoretical Framework.  

PubMed

Shift work and overtime have been implicated as important work-related risk factors for cardiovascular disease (CVD). Many firefighters who contractually work on a 24-hr work schedule, often do overtime (additional 24-hr shifts) which can result in working multiple, consecutive 24-hr shifts. Very little research has been conducted on firefighters at work that examines the impact of performing consecutive 24-hr shifts on cardiovascular physiology. Also, there have been no standard field methods for assessing in firefighters the cardiovascular changes that result from 24-hr shifts, what we call "cardiovascular strain". The objective of this study, as the first step toward elucidating the role of very long (> 48 hrs) shifts in the development of CVD in firefighters, is to develop and describe a theoretical framework for studying cardiovascular strain in firefighters on very long shifts (i.e., > 2 consecutive 24-hr shifts). The developed theoretical framework was built on an extensive literature review, our recently completed studies with firefighters in Southern California, e-mail and discussions with several firefighters on their experiences of consecutive shifts, and our recently conducted feasibility study in a small group of firefighters of several ambulatory cardiovascular strain biomarkers (heart rate, heart rate variability, blood pressure, salivary cortisol, and salivary C-reactive protein). The theoretical framework developed in this study will facilitate future field studies on consecutive 24-hr shifts and cardiovascular health in firefighters. Also it will increase our understanding of the mechanisms by which shift work or long work hours can affect CVD, particularly through CVD biological risk factors, and thereby inform policy about sustainable work and rest schedules for firefighters. PMID:24602344

Choi, Bongkyoo; Schnall, Peter L; Dobson, Marnie; Garcia-Rivas, Javier; Kim, Hyoungryoul; Zaldivar, Frank; Israel, Leslie; Baker, Dean

2014-01-01

89

Very Long (> 48 hours) Shifts and Cardiovascular Strain in Firefighters: a Theoretical Framework  

PubMed Central

Shift work and overtime have been implicated as important work-related risk factors for cardiovascular disease (CVD). Many firefighters who contractually work on a 24-hr work schedule, often do overtime (additional 24-hr shifts) which can result in working multiple, consecutive 24-hr shifts. Very little research has been conducted on firefighters at work that examines the impact of performing consecutive 24-hr shifts on cardiovascular physiology. Also, there have been no standard field methods for assessing in firefighters the cardiovascular changes that result from 24-hr shifts, what we call “cardiovascular strain”. The objective of this study, as the first step toward elucidating the role of very long (> 48 hrs) shifts in the development of CVD in firefighters, is to develop and describe a theoretical framework for studying cardiovascular strain in firefighters on very long shifts (i.e., > 2 consecutive 24-hr shifts). The developed theoretical framework was built on an extensive literature review, our recently completed studies with firefighters in Southern California, e-mail and discussions with several firefighters on their experiences of consecutive shifts, and our recently conducted feasibility study in a small group of firefighters of several ambulatory cardiovascular strain biomarkers (heart rate, heart rate variability, blood pressure, salivary cortisol, and salivary C-reactive protein). The theoretical framework developed in this study will facilitate future field studies on consecutive 24-hr shifts and cardiovascular health in firefighters. Also it will increase our understanding of the mechanisms by which shift work or long work hours can affect CVD, particularly through CVD biological risk factors, and thereby inform policy about sustainable work and rest schedules for firefighters. PMID:24602344

2014-01-01

90

The Pedagogy of Primary Historical Sources in Mathematics: Classroom Practice Meets Theoretical Frameworks  

NASA Astrophysics Data System (ADS)

We analyze our method of teaching with primary historical sources within the context of theoretical frameworks for the role of history in teaching mathematics developed by Barbin, Fried, Jahnke, Jankvist, and Kjeldsen and Blomhøj, and more generally from the perspective of Sfard's theory of learning as communication. We present case studies for two of our guided student modules that are built around sequences of primary sources and are intended for learning core curricular material, one on logical implication, the other on the concept of a group. Additionally, we propose some conclusions about the advantages and challenges of using primary sources in teaching mathematics.

Barnett, Janet Heine; Lodder, Jerry; Pengelley, David

2013-07-01

91

Phylogenetic Framework and Molecular Signatures for the Main Clades of the Phylum Actinobacteria  

PubMed Central

Summary: The phylum Actinobacteria harbors many important human pathogens and also provides one of the richest sources of natural products, including numerous antibiotics and other compounds of biotechnological interest. Thus, a reliable phylogeny of this large phylum and the means to accurately identify its different constituent groups are of much interest. Detailed phylogenetic and comparative analyses of >150 actinobacterial genomes reported here form the basis for achieving these objectives. In phylogenetic trees based upon 35 conserved proteins, most of the main groups of Actinobacteria as well as a number of their superageneric clades are resolved. We also describe large numbers of molecular markers consisting of conserved signature indels in protein sequences and whole proteins that are specific for either all Actinobacteria or their different clades (viz., orders, families, genera, and subgenera) at various taxonomic levels. These signatures independently support the existence of different phylogenetic clades, and based upon them, it is now possible to delimit the phylum Actinobacteria (excluding Coriobacteriia) and most of its major groups in clear molecular terms. The species distribution patterns of these markers also provide important information regarding the interrelationships among different main orders of Actinobacteria. The identified molecular markers, in addition to enabling the development of a stable and reliable phylogenetic framework for this phylum, also provide novel and powerful means for the identification of different groups of Actinobacteria in diverse environments. Genetic and biochemical studies on these Actinobacteria-specific markers should lead to the discovery of novel biochemical and/or other properties that are unique to different groups of Actinobacteria. PMID:22390973

Gao, Beile

2012-01-01

92

Theoretical and experimental analysis of H2 binding in a prototype metal organic framework material  

SciTech Connect

Hydrogen adsorption by the metal organic framework (MOF) structure Zn2(BDC)2(TED) is investigated using a combination of experimental and theoretical methods. By use of the nonempirical van der Waals density-functional (vdW-DF) approach, it is found that the locus of deepest H2 binding positions lies within two types of narrow channel. The energies of the most stable binding sites, as well as the number of such binding sites, are consistent with the values obtained from experimental adsorption isotherms and heat of adsorption data. Calculations of the shift of the H H stretch frequency when adsorbed in the MOF give a value of approximately ?30 cm?1 at the strongest binding point in each of the two channels. Ambient temperature infrared absorption spectroscopy measurements give a hydrogen peak centered at 4120 cm?1, implying a shift consistent with the theoretical calculations.

Kong, Dr. Lingzhu [Rutgers University; Cooper, Valentino R [ORNL; Nijem, Nour [University of Texas, Dallas; Li, Kunhao [Rutgers University; Li, Jing [Rutgers University; Chabal, Yves J. [University of Texas, Dallas; Langreth, David C. [Rutgers University

2009-01-01

93

Rethinking theoretical approaches to stigma: a Framework Integrating Normative Influences on Stigma (FINIS).  

PubMed

A resurgence of research and policy efforts on stigma both facilitates and forces a reconsideration of the levels and types of factors that shape reactions to persons with conditions that engender prejudice and discrimination. Focusing on the case of mental illness but drawing from theories and studies of stigma across the social sciences, we propose a framework that brings together theoretical insights from micro, meso and macro level research: Framework Integrating Normative Influences on Stigma (FINIS) starts with Goffman's notion that understanding stigma requires a language of social relationships, but acknowledges that individuals do not come to social interaction devoid of affect and motivation. Further, all social interactions take place in a context in which organizations, media and larger cultures structure normative expectations which create the possibility of marking "difference". Labelling theory, social network theory, the limited capacity model of media influence, the social psychology of prejudice and discrimination, and theories of the welfare state all contribute to an understanding of the complex web of expectations shaping stigma. FINIS offers the potential to build a broad-based scientific foundation based on understanding the effects of stigma on the lives of persons with mental illness, the resources devoted to the organizations and families who care for them, and policies and programs designed to combat stigma. We end by discussing the clear implications this framework holds for stigma reduction, even in the face of conflicting results. PMID:18436358

Pescosolido, Bernice A; Martin, Jack K; Lang, Annie; Olafsdottir, Sigrun

2008-08-01

94

Patterns of Control over the Teaching-Studying-Learning Process and Classrooms as Complex Dynamic Environments: A Theoretical Framework  

ERIC Educational Resources Information Center

In this theoretical paper the role of power in classroom interactions is examined in terms of a dominance continuum to advance a theoretical framework justifying the emergence of three ways of distributing power when it comes to dealing with the control over the teaching-studying-learning (TSL) "pattern of teacher domination," "pattern of…

Harjunen, Elina

2012-01-01

95

Stratigraphical framework of basaltic lavas in Torres Syncline main valley, southern Parana-Etendeka Volcanic Province  

NASA Astrophysics Data System (ADS)

The Paraná-Etendeka Volcanic Province records the volcanism of the Early Cretaceous that precedes the fragmentation of the South-Gondwana supercontinent. Traditionally, investigations of these rocks prioritized the acquisition of geochemical and isotopic data, considering the volcanic stack as a monotonous succession of tabular flows. Torres Syncline is a tectonic structure located in southern Brazil and where the Parana-Etendeka basalts are well preserved. This work provides a detailed analysis of lithofacies and facies architecture, integrated to petrographic and geochemical data. We identified seven distinct lithofacies grouped into four facies associations related to different flow morphologies. The basaltic lava flows in the area can be divided into two contrasting units: Unit I - pahoehoe flow fields; and Unit II - simple rubbly flows. The first unit is build up by innumerous pahoehoe lava flows that cover the sandstones of Botucatu Formation. These flows occur as sheet pahoehoe, compound pahoehoe, and ponded lavas morphologies. Compound lavas are olivine-phyric basalts with intergranular pyroxenes. In ponded lavas and cores of sheet flows coarse plagioclase-phyric basalts are common. The first pahoehoe lavas are more primitive with higher contents of MgO. The emplacement of compound pahoehoe flows is related to low volume eruptions, while sheet lavas were emplaced during sustained eruptions. In contrast, Unit II is formed by thick simple rubbly lavas, characterized by a massive core and a brecciated/rubbly top. Petrographically these flows are characterized by plagioclase-phyric to aphyric basalts with high density of plagioclase crystals in the matrix. Chemically they are more differentiated lavas, and the emplacement is related to sustained high effusion rate eruptions. Both units are low TiO2 and have geochemical characteristics of Gramado magma type. The Torres Syncline main valley has a similar evolution when compared to other Large Igneous Provinces, with compound flows at the base and simple flows in the upper portions. The detailed field work allied with petrography and geochemical data are extremely important to identify heterogeneities inside the volcanic pile and allows the construction of a detailed lithostratigraphical framework.

Rossetti, Lucas M.; Lima, Evandro F.; Waichel, Breno L.; Scherer, Claiton M.; Barreto, Carla J.

2014-12-01

96

Geoscience Academic Provenance: A Theoretical Framework for Understanding Geoscience Students' Pathways  

NASA Astrophysics Data System (ADS)

The demand and employment opportunities for geoscientists in the United States are projected to increase 23% from 2008 to 2018 (Gonzales, 2011). Despite this trend, there is a disconnect between undergraduate geoscience students and their desire to pursue geoscience careers. A theoretical framework was developed to understand the reasons why students decide to major in the geosciences and map those decisions to their career aspirations (Houlton, 2010). A modified critical incident study was conducted to develop the pathway model from 17, one-hour long semi-structured interviews of undergraduate geoscience majors from two Midwest Research Institutions (Houlton, 2010). Geoscience Academic Provenance maps geoscience students' initial interests, entry points into the major, critical incidents and future career goals as a pathway, which elucidates the relationships between each of these components. Analyses identified three geoscience student population groups that followed distinct pathways: Natives, Immigrants and Refugees. A follow up study was conducted in 2011 to ascertain whether these students continued on their predicted pathways, and if not, reasons for attrition. Geoscientists can use this framework as a guide to inform future recruitment and retention initiatives and target these geoscience population groups for specific employment sectors.

Houlton, H.; Keane, C.

2012-04-01

97

Predicting Recovery from Acidic Deposition: Applying a Modified TAF (Tracking and Analysis Framework) Model to Maine (USA) High Elevation Lakes  

Microsoft Academic Search

We adapted a reduced-form model, built to predict the aquatic effects of alternative nitrogen and sulfur emissions scenarios on Adirondack lakes, New York, for use on high elevation lakes of Maine (HELM), USA. The Tracking and Analysis Framework (TAF) model was originally designed to evaluate the biotic, economic, and health effects of acid deposition. The TAF model developed in our

Joshua J. Lawler; Jonathan Rubin; Bernard J. Cosby; Ivan J. Fernandez; Jeffrey S. Kahl; Stephen A. Norton

2005-01-01

98

Patient centredness in integrated care: results of a qualitative study based on a systems theoretical framework  

PubMed Central

Introduction Health care providers seek to improve patient-centred care. Due to fragmentation of services, this can only be achieved by establishing integrated care partnerships. The challenge is both to control costs while enhancing the quality of care and to coordinate this process in a setting with many organisations involved. The problem is to establish control mechanisms, which ensure sufficiently consideration of patient centredness. Theory and methods Seventeen qualitative interviews have been conducted in hospitals of metropolitan areas in northern Germany. The documentary method, embedded into a systems theoretical framework, was used to describe and analyse the data and to provide an insight into the specific perception of organisational behaviour in integrated care. Results The findings suggest that integrated care partnerships rely on networks based on professional autonomy in the context of reliability. The relationships of network partners are heavily based on informality. This correlates with a systems theoretical conception of organisations, which are assumed autonomous in their decision-making. Conclusion and discussion Networks based on formal contracts may restrict professional autonomy and competition. Contractual bindings that suppress the competitive environment have negative consequences for patient-centred care. Drawbacks remain due to missing self-regulation of the network. To conclude, less regimentation of integrated care partnerships is recommended. PMID:25411573

Lüdecke, Daniel

2014-01-01

99

A theoretical framework for analyzing the effect of external change on tidal dynamics in estuaries  

NASA Astrophysics Data System (ADS)

The most densely populated areas of the world are usually located in coastal areas near estuaries. As a result, estuaries are often subject to intense human interventions, such as dredging for navigation, dam construction and fresh water withdrawal etc., which in some areas has led to serious deterioration of invaluable ecosystems. Hence it is important to understand the influence of such interventions on tidal dynamics in these areas. In this study, we present one consistent theoretical framework for tidal hydrodynamics, which can be used as a rapid assessment technique that assist policy maker and managers to make considered decisions for the protection and management of estuarine environment when assessing the effect of human interventions in estuaries. Analytical solutions to the one-dimensional St. Venant equations for the tidal hydrodynamics in convergent unbounded estuaries with negligible river discharge can be cast in the form of a set of four implicit dimensionless equations for phase lag, velocity amplitude, damping, and wave celerity, as a function of two localized parameters describing friction and convergence. This method allows for the comparison of the different analytical approaches by rewriting the different solutions in the same format. In this study, classical and more recent formulations are compared, showing the differences and similarities associated to their specific simplifications. The envelope method, which is based on the consideration of the dynamics at high water and low water, can be used to derive damping equations that use different friction approximations. This results in as many analytical solutions, and thereby allows one to build a consistent theoretical framework. Analysis of the asymptotic behaviour of the equations shows that an equilibrium tidal amplitude exits reflecting the balance between friction and channel convergence. The framework is subsequently extended to take into account the effect of river discharge. Hence, the analytical solutions are applicable even in the upstream part of an estuary, where the influence of river discharge is remarkable. The proposed analytical solutions are transparent and practical, allowing a quantitative and qualitative assessment of human interventions (e.g., dredging, flow reduction) on tidal dynamics. Moreover, they are rapid assessment techniques that enable the users to set up a simple model and to understand the functioning of the system with a minimum of information required. The analytical model is illustrated in three large-scale estuaries with significant influence by human activities, i.e., the Scheldt estuary in the Netherlands, the Modaomen and the Yangtze estuaries in China. In these estuaries, the correspondence with observations is good, which suggests that the proposed model is a useful, yet realistic and reliable instrument for quick detection of the effect of human interventions on tidal dynamics and subsequent environmental issues, such as salt intrusion.

CAI, H.; Savenije, H.; Toffolon, M.

2013-12-01

100

A Theoretical Study of Acoustic Glitches in Low-mass Main-sequence Stars  

NASA Astrophysics Data System (ADS)

There are regions in stars, such as ionization zones and the interface between radiative and convective regions, that cause a localized sharp variation in the sound speed. These are known as "acoustic glitches". Acoustic glitches leave their signatures on the oscillation frequencies of stars, and hence these signatures can be used as diagnostics of these regions. In particular, the signatures of these glitches can be used as diagnostics for the position of the second helium ionization zone and that of the base of the envelope convection zone. With the help of stellar models, we study the properties of these acoustic glitches in main-sequence stars. We find that the acoustic glitch due to the helium ionization zone does not correspond to the dip in the adiabatic index ?1 caused by the ionization of He II, but to the peak in ?1 between the He I and He II ionization zones. We find that it is easiest to study the acoustic glitch that is due to the helium ionization zone in stars with masses in the range 0.9-1.2 M ?.

Verma, Kuldeep; Antia, H. M.; Basu, Sarbani; Mazumdar, Anwesh

2014-10-01

101

An Information-Theoretic Framework for Optimal Location Tracking in MultiSystem 4G Wireless Networks  

Microsoft Academic Search

An information-theoretic framework is developed for optimal location management in multi-system, fourth gen- eration (4G) wireless networks. The framework envisions that each individual sub-system operates fairly independently, and does not require public knowledge of individual sub-network topologies. To capture the variation in paging and location update costs in this heterogeneous environment, the location management problem is formulated in terms of

Abhishek Roy; Archan Misra; Sajal K. Das

2004-01-01

102

A Theoretical Framework for Understanding the Effects of Saharan Mineral Dust Aerosols on African Easterly Waves  

NASA Astrophysics Data System (ADS)

Studies have shown that a large fraction of the intense hurricanes observed over the Atlantic Ocean originate as African easterly waves (AEWs). Of the many processes that affect the propagation, growth and structure of AEWs, the effects of Saharan mineral dust aerosols on AEWs remains an outstanding scientific problem. With this in mind, a new theoretical framework is presented that illuminates causal relationships between Saharan dust and the linear dynamics of AEWs. The framework is built on a quasi-geostrophic system governed by coupled equations for potential vorticity, temperature, and dust continuity. The radiative-dust heating rate accounts for both shortwave and longwave radiative transfer. The source of dust is due to surface emission, which depends on surface wind; the sinks of dust are due to sedimentation and dry deposition. A perturbation analysis yields analytical expressions for the propagation and growth characteristics of the model's AEWs. These expressions are functions of vertically and meridionally averaged wave activity, which depends on wave spatial structure, dust-radiative heating, and the background distributions of wind, temperature, and dust mixing ratio. More specifically, the propagation and growth of the AEWs depend on the amount of dust lofted from the surface by the wind, and the meridional and vertical gradients of the basic state dust distribution, which are modulated by the Doppler-shifted frequency. Idealized cases are presented that show the effects of Saharan dust on the propagation, group velocity, growth, structure, and wave fluxes of AEWs. The clarity of the expressions connecting dust aerosols to the linear properties of AEWs provides an important interpretive tool for analyzing results obtained from comprehensive model simulations of AEWs, such as those produced by the Weather Research and Forecasting (WRF) model.

Nathan, T. R.; Grogan, D.; Chen, S.

2013-12-01

103

Qualitative evaluation of a local coronary heart disease treatment pathway: practical implications and theoretical framework  

PubMed Central

Background Coronary heart disease (CHD) is a common medical problem in general practice. Due to its chronic character, shared care of the patient between general practitioner (GP) and cardiologist (C) is required. In order to improve the cooperation between both medical specialists for patients with CHD, a local treatment pathway was developed. The objective of this study was first to evaluate GPs’ opinions regarding the pathway and its practical implications, and secondly to suggest a theoretical framework of the findings by feeding the identified key factors influencing the pathway implementation into a multi-dimensional model. Methods The evaluation of the pathway was conducted in a qualitative design on a sample of 12 pathway developers (8 GPs and 4 cardiologists) and 4 pathway users (GPs). Face-to face interviews, which were aligned with previously conducted studies of the department and assumptions of the theory of planned behaviour (TPB), were performed following a semi-structured interview guideline. These were audio-taped, transcribed verbatim, coded, and analyzed according to the standards of qualitative content analysis. Results We identified 10 frequently mentioned key factors having an impact on the implementation success of the CHD treatment pathway. We thereby differentiated between pathway related (pathway content, effort, individual flexibility, ownership), behaviour related (previous behaviour, support), interaction related (patient, shared care/colleagues), and system related factors (context, health care system). The overall evaluation of the CHD pathway was positive, but did not automatically lead to a change of clinical behaviour as some GPs felt to have already acted as the pathway recommends. Conclusions By providing an account of our experience creating and implementing an intersectoral care pathway for CHD, this study contributes to our knowledge of factors that may influence physicians’ decisions regarding the use of a local treatment pathway. An improved adaptation of the pathway in daily practice might be best achieved by a combined implementation strategy addressing internal and external factors. A simple, direct adaptation regards the design of the pathway material (e.g. layout, PC version), or the embedding of the pathway in another programme, like a Disease Management Programme (DMP). In addition to these practical implications, we propose a theoretical framework to understand the key factors’ influence on the pathway implementation, with the identified factors along the microlevel (pathway related factors), the mesolevel (interaction related factors), and system- related factors along the macrolevel. PMID:22584032

2012-01-01

104

A THEORETICAL FRAMEWORK FOR COMBINING TECHNIQUES THAT PROBE THE LINK BETWEEN GALAXIES AND DARK MATTER  

SciTech Connect

We develop a theoretical framework that combines measurements of galaxy-galaxy lensing, galaxy clustering, and the galaxy stellar mass function in a self-consistent manner. While considerable effort has been invested in exploring each of these probes individually, attempts to combine them are still in their infancy. These combinations have the potential to elucidate the galaxy-dark matter connection and the galaxy formation physics responsible for it, as well as to constrain cosmological parameters and to test the nature of gravity. In this paper, we focus on a theoretical model that describes the galaxy-dark matter connection based on standard halo occupation distribution techniques. Several key modifications enable us to extract additional parameters that determine the stellar-to-halo mass relation and to simultaneously fit data from multiple probes while allowing for independent binning schemes for each probe. We construct mock catalogs from numerical simulations to investigate the effects of sample variance and covariance for each probe. Finally, we analyze how trends in each of the three observables impact the derived parameters of the model. In particular, we investigate various features of the observed galaxy stellar mass function (low-mass slope, 'plateau', knee, and high-mass cutoff) and show how each feature is related to the underlying relationship between stellar and halo mass. We demonstrate that the observed 'plateau' feature in the stellar mass function at M{sub *} {approx} 2 x 10{sup 10} M{sub sun} is due to the transition that occurs in the stellar-to-halo mass relation at M{sub h} {approx} 10{sup 12} M{sub sun} from a low-mass power-law regime to a sub-exponential function at higher stellar mass.

Leauthaud, Alexie [Lawrence Berkeley National Lab, Berkeley, CA 94720 (United States); Tinker, Jeremy [Center for Cosmology and Particle Physics, Department of Physics, New York University, New York, NY 10003 (United States); Behroozi, Peter S.; Busha, Michael T.; Wechsler, Risa H., E-mail: asleauthaud@lbl.gov [Kavli Institute for Particle Astrophysics and Cosmology, Physics Department, Stanford University, and SLAC National Accelerator Laboratory, Stanford, CA 94305 (United States)

2011-09-01

105

Assessment of Environmental Enteropathy in the MAL-ED Cohort Study: Theoretical and Analytic Framework.  

PubMed

Individuals in the developing world live in conditions of intense exposure to enteric pathogens due to suboptimal water and sanitation. These environmental conditions lead to alterations in intestinal structure, function, and local and systemic immune activation that are collectively referred to as environmental enteropathy (EE). This condition, although poorly defined, is likely to be exacerbated by undernutrition as well as being responsible for permanent growth deficits acquired in early childhood, vaccine failure, and loss of human potential. This article addresses the underlying theoretical and analytical frameworks informing the methodology proposed by the Etiology, Risk Factors and Interactions of Enteric Infections and Malnutrition and the Consequences for Child Health and Development (MAL-ED) cohort study to define and quantify the burden of disease caused by EE within a multisite cohort. Additionally, we will discuss efforts to improve, standardize, and harmonize laboratory practices within the MAL-ED Network. These efforts will address current limitations in the understanding of EE and its burden on children in the developing world. PMID:25305293

Kosek, Margaret; Guerrant, Richard L; Kang, Gagandeep; Bhutta, Zulfiqar; Yori, Pablo Peñataro; Gratz, Jean; Gottlieb, Michael; Lang, Dennis; Lee, Gwenyth; Haque, Rashidul; Mason, Carl J; Ahmed, Tahmeed; Lima, Aldo; Petri, William A; Houpt, Eric; Olortegui, Maribel Paredes; Seidman, Jessica C; Mduma, Estomih; Samie, Amidou; Babji, Sudhir

2014-11-01

106

Person-centered work environments, psychological safety, and positive affect in healthcare: a theoretical framework.  

PubMed

We propose that in order to systematically improve healthcare quality, healthcare organizations (HCOs) need work environments that are person-centered: environments that support the careprovider as well as the patient. We further argue that HCOs have a moral imperative to provide a workplace where professional care standards can be achieved. We draw upon a large body of research from several disciplines to propose and articulate a theoretical framework that explains how the work environment should be related to the well-being of patients and careproviders, that is, the potential mediating mechanisms. Person-centered work environments include: 1. Climates for patient-centered care. 2. Climates for quality improvement. 3. Benevolent ethical climates. Such a work environment should support the provision of patient-centered care, and should lead to positive psychological states for careproviders, including psychological safety and positive affect. The model contributes to theory by specifying relationships between important organizational variables. The model can potentially contribute to practice by linking specific work environment attributes to outcomes for careproviders and patients. PMID:18839753

Rathert, Cheryl; May, Douglas R

2008-01-01

107

A general theoretical framework for interpreting patient-reported outcomes estimated from ordinally scaled item responses.  

PubMed

A simple theoretical framework explains patient responses to items in rating scale questionnaires. Fixed latent variables position each patient and each item on the same linear scale. Item responses are governed by a set of fixed category thresholds, one for each ordinal response category. A patient's item responses are magnitude estimates of the difference between the patient variable and the patient's estimate of the item variable, relative to his/her personally defined response category thresholds. Differences between patients in their personal estimates of the item variable and in their personal choices of category thresholds are represented by random variables added to the corresponding fixed variables. Effects of intervention correspond to changes in the patient variable, the patient's response bias, and/or latent item variables for a subset of items. Intervention effects on patients' item responses were simulated by assuming the random variables are normally distributed with a constant scalar covariance matrix. Rasch analysis was used to estimate latent variables from the simulated responses. The simulations demonstrate that changes in the patient variable and changes in response bias produce indistinguishable effects on item responses and manifest as changes only in the estimated patient variable. Changes in a subset of item variables manifest as intervention-specific differential item functioning and as changes in the estimated person variable that equals the average of changes in the item variables. Simulations demonstrate that intervention-specific differential item functioning produces inefficiencies and inaccuracies in computer adaptive testing. PMID:23427227

Massof, Robert W

2014-10-01

108

Community of Inquiry as a Theoretical Framework to Foster "Epistemic Engagement" and "Cognitive Presence" in Online Education  

ERIC Educational Resources Information Center

In this paper, several recent theoretical conceptions of technology-mediated education are examined and a study of 2159 online learners is presented. The study validates an instrument designed to measure teaching, social, and cognitive presence indicative of a community of learners within the community of inquiry (CoI) framework [Garrison, D. R.,…

Shea, Peter; Bidjerano, Temi

2009-01-01

109

Informant Discrepancies in the Assessment of Childhood Psychopathology: A Critical Review, Theoretical Framework, and Recommendations for Further Study  

Microsoft Academic Search

Discrepancies often exist among different informants' (e.g., parents, children, teachers) ratings of child psychopathology. Informant discrepancies have an impact on the assessment, classification, and treatment of childhood psychopathology. Empirical work has identified informant characteristics that may influence informant discrepancies. Limitations of previous work include inconsistent measurement of informant discrepancies and, perhaps most importantly, the absence of a theoretical framework to

Andres De Los Reyes; Alan E. Kazdin

2005-01-01

110

A theoretical framework for antigay aggression: Review of established and hypothesized effects within the context of the general aggression model  

Microsoft Academic Search

Theory and research on antigay aggression has identified different motives that facilitate aggression based on sexual orientation. However, the individual and situational determinants of antigay aggression associated with these motivations have yet to be organized within a single theoretical framework. This limits researchers' ability to organize existing knowledge, link that knowledge with related aggression theory, and guide the application of

Dominic J. Parrott

2008-01-01

111

The Problem With the Phrase Women and Minorities: Intersectionality--an Important Theoretical Framework for Public Health  

PubMed Central

Intersectionality is a theoretical framework that posits that multiple social categories (e.g., race, ethnicity, gender, sexual orientation, socioeconomic status) intersect at the micro level of individual experience to reflect multiple interlocking systems of privilege and oppression at the macro, social-structural level (e.g., racism, sexism, heterosexism). Public health’s commitment to social justice makes it a natural fit with intersectionality’s focus on multiple historically oppressed populations. Yet despite a plethora of research focused on these populations, public health studies that reflect intersectionality in their theoretical frameworks, designs, analyses, or interpretations are rare. Accordingly, I describe the history and central tenets of intersectionality, address some theoretical and methodological challenges, and highlight the benefits of intersectionality for public health theory, research, and policy. PMID:22594719

2012-01-01

112

Can the theoretical domains framework account for the implementation of clinical quality interventions?  

PubMed Central

Background The health care quality improvement movement is a complex enterprise. Implementing clinical quality initiatives requires attitude and behaviour change on the part of clinicians, but this has proven to be difficult. In an attempt to solve this kind of behavioural challenge, the theoretical domains framework (TDF) has been developed. The TDF consists of 14 domains from psychological and organisational theory said to influence behaviour change. No systematic research has been conducted into the ways in which clinical quality initiatives map on to the domains of the framework. We therefore conducted a qualitative mapping experiment to determine to what extent, and in what ways, the TDF is relevant to the implementation of clinical quality interventions. Methods We conducted a thematic synthesis of the qualitative literature exploring clinicians’ perceptions of various clinical quality interventions. We analysed and synthesised 50 studies in total, in five domains of clinical quality interventions: clinical quality interventions in general, structural interventions, audit-type interventions, interventions aimed at making practice more evidence-based, and risk management interventions. Data were analysed thematically, followed by synthesis of these themes into categories and concepts, which were then mapped to the domains of the TDF. Results Our results suggest that the TDF is highly relevant to the implementation of clinical quality interventions. It can be used to map most, if not all, of the attitudinal and behavioural barriers and facilitators of uptake of clinical quality interventions. Each of these 14 domains appeared to be relevant to many different types of clinical quality interventions. One possible additional domain might relate to perceived trustworthiness of those instituting clinical quality interventions. Conclusions The TDF can be usefully applied to a wide range of clinical quality interventions. Because all 14 of the domains emerged as relevant, and we did not identify any obvious differences between different kinds of clinical quality interventions, our findings support an initially broad approach to identifying barriers and facilitators, followed by a “drilling down” to what is most contextually salient. In future, it may be possible to establish a model of clinical quality policy implementation using the TDF. PMID:24359085

2013-01-01

113

Towards a Theoretical Framework for Informal Language Learning Via Interactive Television  

Microsoft Academic Search

This paper proposes a pedagogical framework for informal language learning services via interactive television. We argue that mapping current language learning theories onto learners' expressed attitudes to a) their language learning and b) interactive television can provide a sound pedagogical framework for iTV based language learning services. Based on this framework, we suggest a number of possible interactive features that

Lyn Pemberton; Sanaz Fallahkhair; Judith Masthoff

2004-01-01

114

Evaluation of capacity-building program of district health managers in India: a contextualized theoretical framework.  

PubMed

Performance of local health services managers at district level is crucial to ensure that health services are of good quality and cater to the health needs of the population in the area. In many low- and middle-income countries, health services managers are poorly equipped with public health management capacities needed for planning and managing their local health system. In the south Indian Tumkur district, a consortium of five non-governmental organizations partnered with the state government to organize a capacity-building program for health managers. The program consisted of a mix of periodic contact classes, mentoring and assignments and was spread over 30?months. In this paper, we develop a theoretical framework in the form of a refined program theory to understand how such a capacity-building program could bring about organizational change. A well-formulated program theory enables an understanding of how interventions could bring about improvements and an evaluation of the intervention. In the refined program theory of the intervention, we identified various factors at individual, institutional, and environmental levels that could interact with the hypothesized mechanisms of organizational change, such as staff's perceived self-efficacy and commitment to their organizations. Based on this program theory, we formulated context-mechanism-outcome configurations that can be used to evaluate the intervention and, more specifically, to understand what worked, for whom and under what conditions. We discuss the application of program theory development in conducting a realist evaluation. Realist evaluation embraces principles of systems thinking by providing a method for understanding how elements of the system interact with one another in producing a given outcome. PMID:25121081

Prashanth, N S; Marchal, Bruno; Kegels, Guy; Criel, Bart

2014-01-01

115

Evaluation of Capacity-Building Program of District Health Managers in India: A Contextualized Theoretical Framework  

PubMed Central

Performance of local health services managers at district level is crucial to ensure that health services are of good quality and cater to the health needs of the population in the area. In many low- and middle-income countries, health services managers are poorly equipped with public health management capacities needed for planning and managing their local health system. In the south Indian Tumkur district, a consortium of five non-governmental organizations partnered with the state government to organize a capacity-building program for health managers. The program consisted of a mix of periodic contact classes, mentoring and assignments and was spread over 30?months. In this paper, we develop a theoretical framework in the form of a refined program theory to understand how such a capacity-building program could bring about organizational change. A well-formulated program theory enables an understanding of how interventions could bring about improvements and an evaluation of the intervention. In the refined program theory of the intervention, we identified various factors at individual, institutional, and environmental levels that could interact with the hypothesized mechanisms of organizational change, such as staff’s perceived self-efficacy and commitment to their organizations. Based on this program theory, we formulated context–mechanism–outcome configurations that can be used to evaluate the intervention and, more specifically, to understand what worked, for whom and under what conditions. We discuss the application of program theory development in conducting a realist evaluation. Realist evaluation embraces principles of systems thinking by providing a method for understanding how elements of the system interact with one another in producing a given outcome. PMID:25121081

Prashanth, N. S.; Marchal, Bruno; Kegels, Guy; Criel, Bart

2014-01-01

116

Scale-relativity and quantization of the universe. I. Theoretical framework  

NASA Astrophysics Data System (ADS)

The theory of scale relativity extends Einstein's principle of relativity to scale transformations of resolutions. It is based on the giving up of the axiom of differentiability of the space-time continuum. The new framework generalizes the standard theory and includes it as a special case. Three consequences arise from this withdrawal: (i) The geometry of space-time must be fractal, i.e., explicitly resolution-dependent. This allows us to include resolutions in the definition of the state of the reference system, and to require scale-covariance of the equations of physics under scale transformations. (ii) The geodesics of the non-differentiable space-time are themselves fractal and in infinite number. This divergence strongly suggests we undertake a statistical, non-deterministic description. (iii) Time reversibility is broken at the infinitesimal level. This can be described in terms of a two-valuedness of the time derivative, which we account by using complex numbers. We finally combine these three effects by constructing a new tool, the scale-covariant derivative, which transforms classical mechanics into a generalized, quantum-like mechanics. Scale relativity was initially developed in order to re-found quantum mechanics on first principles (while its present foundation is axiomatic). However, the scale-relativistic approach is expected to apply not only at small scales, but also at very large space- and time-scales, although with a different interpretation. Indeed, we find that the scale symmetry must be broken at two (relative) scales, so that the scale axis is divided in three domains: (i) the quantum, scale-dependent microphysical domain, (ii) the classical, intermediate, scale-independent domain, (iii) but also the macroscopic, cosmological domain which becomes scale-dependent again and may then be described on very large time-scales (beyond a predictability horizon) in terms of a non-deterministic, statistical, quantum-like theory. In the new framework, we definitively give up the hope to predict individual trajectories on very large time scales. This leads us to describing their virtual families in terms of complex probability amplitudes, which are solutions of generalized Schrodinger equations. The squared modulus of these probability amplitudes yields probability densities, whose peaks are interpreted as a tendency for the system to make structures. Since the quantizations in quantum mechanics appear as a direct consequence of the limiting conditions and of the shape of the input field, the theory thus naturally provides self-organization of the system it describes, in connection with its environment. In the present first paper of this series, we first recall the structure of the scale-relativity theory, then we apply our scale-covariant procedure to various equations of classical physics that are relevant to astrophysical processes, including the equation of motion of a particle in a gravitational field (Newtonian and Einsteinian), in an electromagnetic field, the Euler and Navier-Stokes equations, the rotational motion of solids, dissipative systems, and first hints on field equations themselves. In all these cases, we obtain new generalized Schrodinger equations which allow quantized solutions. In scale-relativity therefore, the underlying fractal geometry of space-time plays the role of a universal structuring ``field". In subsequent papers of this series, we shall derive the solutions of our equations, then show that several new theoretical predictions can be made, and that they can be successfully checked by an analysis of the observational data.

Nottale, L.

1997-11-01

117

A Theoretical Framework of the Relation between Socioeconomic Status and Academic Achievement of Students  

ERIC Educational Resources Information Center

A socio-psychological analytical framework will be adopted to illuminate the relation between socioeconomic status and academic achievement. The framework puts the emphasis to incorporate micro familial factors into macro factor of the tracking system. Initially, children of the poor families always lack major prerequisite: diminution of cognitive…

Lam, Gigi

2014-01-01

118

A theoretical framework and research agenda for studying team attributions in sport  

Microsoft Academic Search

The attributions made for group outcomes have attracted a great deal of interest in recent years. In this article we bring together much of the current research on attribution theory in sport and outline a new conceptual framework and research agenda for investigating the attributions of team members. The proposed framework draws on multiple conceptual approaches including models of attribution,

Mark S. Allen; Iain Greenlees

2012-01-01

119

Exploring the theoretical and philosophical frameworks that influence private practitioners' mental health treatment of middle-class African American women  

Microsoft Academic Search

The purpose of this qualitative study was to explore the theoretical philosophical frameworks, treatment, engagement, and diagnostic approaches of private practice therapists who treat middle-class African-American women. This qualitative study consisted of eight in-depth interviews with private practitioners who were purposefully selected. The interviews took place over the course of three months and were the sole source of data for

Aisha D. Williams

2010-01-01

120

The Theoretical Framework for Designing Desktop Virtual Reality-Based Learning Environments  

ERIC Educational Resources Information Center

This article describes the instructional design theoretical foundation of a desktop virtual reality-based learning environment aimed at complementing the current novice driver education system in Malaysia. It provides an elaboration of how various components of the learning environment are designed to support this theoretical underpinning that…

Chen, Chwen, Jen; Toh, Seong, Chong; Fauzy, Wan, Mohd

2004-01-01

121

A game theoretic framework for evaluation of the impacts of Hackers diversity on security measures  

Microsoft Academic Search

Game theoretical methods offer new insights into quantitative evaluation of dependability and security. Currently, there is a wide range of useful game theoretic approaches to model the behaviour of intelligent agents. However, it is necessary to revise these approaches if there is a community of hackers with significant diversity in their behaviours. In this paper, we introduce a novel approach

Behzad Zare Moayedi; Mohammad Abdollahi Azgomi

122

Multistage Complexity in Language Proficiency Assessment: A Framework for Aligning Theoretical Perspectives, Test Development, and Psychometrics  

ERIC Educational Resources Information Center

This article contends that the necessary links between constructs and test scores/decisions in language assessment must be established through principled design procedures that align three models: (1) a theoretical construct model; (2) a test development model; and (3) a psychometric scoring model. The theoretical construct model articulates the…

Luecht, Richard M.

2003-01-01

123

Quality of experience in distributed interactive multimedia environments: toward a theoretical framework  

Microsoft Academic Search

The past decades have witnessed a rapid growth of Dis- tributed Interactive Multimedia Environments (DIMEs). De- spite their intensity of user-involved interaction, the exist- ing evaluation frameworks remain very much system-centric. As a step toward the human-centric paradigm, we present a conceptual framework of Quality of Experience (QoE) in DIMEs, to model, measure, and understand user experience and its relationship

Wanmin Wu; Ahsan Arefin; Raoul Rivas; Klara Nahrstedt; Renata M. Sheppard; Zhenyu Yang

2009-01-01

124

Main rotor free wake geometry effects on blade air loads and response for helicopters in steady maneuvers. Volume 1: Theoretical formulation and analysis of results  

NASA Technical Reports Server (NTRS)

A mathematical model and computer program were implemented to study the main rotor free wake geometry effects on helicopter rotor blade air loads and response in steady maneuvers. The theoretical formulation and analysis of results are presented.

Sadler, S. G.

1972-01-01

125

Theoretical study of air forces on an oscillating or steady thin wing in a supersonic main stream  

NASA Technical Reports Server (NTRS)

A theoretical study, based on the linearized equations of motion for small disturbance, is made of the air forces on wings of general plan forms moving forward at a constant supersonic speed. The boundary problem is set up for both the harmonically oscillating and the steady conditions. Two types of boundary conditions are distinguished, which are designated "purely supersonic" and "mixed supersonic." the method is illustrated by applications to a number of examples for both the steady and the oscillating conditions. The purely supersonic case involves independence of action of the upper and lower surfaces of the airfoil and present analysis is mainly concerned with this case. A discussion is first given of the fundamental or elementary solution corresponding to a moving source. The solutions for the velocity potential are then synthesized by means of integration of the fundamental solution for the moving source. The method is illustrated by applications to a number of examples for both the steady and the oscillating cases and for various plan forms, including swept wings and rectangular and triangular plan forms. The special results of a number of authors are shown to be included in the analysis.

Garrick, I E; Rubinow, S I

1947-01-01

126

Psychological elements explaining the consumer's adoption and use of a website recommendation system: A theoretical framework proposal  

Microsoft Academic Search

Purpose – The purpose of this paper is to understand, with an emphasis on the psychological perspective of the research problem, the consumer's adoption and use of a certain web site recommendation system as well as the main psychological outcomes involved. Design\\/methodology\\/approach – The approach takes the form of theoretical modelling. Findings – A conceptual model is proposed and discussed.

Francisco J. Martínez-López; Inma Rodríguez-Ardura; Juan Carlos Gázquez-Abad; Manuel J. Sánchez-Franco; Claudia C. Cabal

2010-01-01

127

A Validation Study of the Leadership Styles of a Holistic Leadership Theoretical Framework  

ERIC Educational Resources Information Center

Purpose: The overall purpose of the European Union-funded Leadership Improvement for Student Achievement (LISA) project was to explore how leadership styles, as conceptualized in the developed dynamic holistic leadership framework, directly or indirectly affect student achievement at the lower secondary level of education in seven European…

Brauckmann, Stefan; Pashiardis, Petros

2011-01-01

128

A Theoretical Framework for Understanding Help-Seeking Processes Among Survivors of Intimate Partner Violence  

Microsoft Academic Search

This paper suggests a conceptual framework for understanding the processes of help-seeking among survivors of intimate partner violence (IPV). A cognitive theory from general literature on help-seeking in “stigmatizing” situations suggests three relevant processes or stages of seeking help in the IPV context: defining the problem, deciding to seek help, and selecting a source of support. Individual, interpersonal, and sociocultural

Belle Liang; Lisa Goodman; Pratyusha Tummala-Narra; Sarah Weintraub

2005-01-01

129

Social marketing and social influences: Using social ecology as a theoretical framework  

Microsoft Academic Search

Social marketing has traditionally been dominated by an individualistic model of design. In this work, the authors apply a social ecology model to the theory and practice of social marketing, demonstrating that a multilevel framework is required to fully expose and account for the complexity of sociocultural and environmental effects. The authors have generated a diagnostic tool for this use.

Katie Collins; Alan Tapp; Ashley Pressley

2010-01-01

130

Rethinking theoretical approaches to stigma: A Framework Integrating Normative Influences on Stigma (FINIS)  

Microsoft Academic Search

A resurgence of research and policy efforts on stigma both facilitates and forces a reconsideration of the levels and types of factors that shape reactions to persons with conditions that engender prejudice and discrimination. Focusing on the case of mental illness but drawing from theories and studies of stigma across the social sciences, we propose a framework that brings together

Bernice A. Pescosolido; Jack K. Martin; Annie Lang; Sigrun Olafsdottir

2008-01-01

131

Open-Ended Learning Environments: A Theoretical Framework and Model for Design.  

ERIC Educational Resources Information Center

This paper presents a framework and model for design of open-ended learning environments (OELEs). First, an overview is presented that addresses key characteristics of OELEs, including: use of meaningful, complex contexts; provision of tools and resources; learner reflection and self-monitoring; and social, material, or technological scaffolding.…

Hill, Janette R.; Land, Susan M.

132

A theoretical framework for antigay aggression: Review of established and hypothesized effects within the context of the general aggression model?  

PubMed Central

Theory and research on antigay aggression has identified different motives that facilitate aggression based on sexual orientation. However, the individual and situational determinants of antigay aggression associated with these motivations have yet to be organized within a single theoretical framework. This limits researchers’ ability to organize existing knowledge, link that knowledge with related aggression theory, and guide the application of new findings. To address these limitations, this article argues for the use of an existing conceptual framework to guide thinking and generate new research in this area of study. Contemporary theories of antigay aggression, and empirical support for these theories, are reviewed and interpreted within the unifying framework of the general aggression model [Anderson, C.A. & Bushman, B.J. (2002). Human aggression. Annual Review of Psychology, 53, 27–51.]. It is concluded that this conceptual framework will facilitate investigation of individual and situational risk factors that may contribute to antigay aggression and guide development of individual-level intervention. PMID:18355952

Parrott, Dominic J.

2008-01-01

133

An Examination of Physical Education Teacher Motivation from a Self-Determination Theoretical Framework  

ERIC Educational Resources Information Center

Background: The motivation of physical education (PE) teachers has received precious little attention over the years. Self-determination theory (SDT) is a salient theoretical model for understanding motivation, and posits that self-determined motivation (i.e., intrinsic motivation) stems from the perceived fulfillment of three psychological needs:…

Carson, Russell L.; Chase, Melissa A.

2009-01-01

134

Measuring demand for sanitation in developing countries: A new theoretical and methodological framework for contingent valuation  

E-print Network

1 Measuring demand for sanitation in developing countries: A new theoretical and methodological (for water, sanitation or health services) and neglect the valuation of nonmarket goods (like, through a survey implemented in Moshi (Tanzania) about demand for sanitation, some methodological changes

Paris-Sud XI, Université de

135

A Framework for Workgroup Collaboration in a Virtual Environment: Theoretical Synthesis and Empirical Exploration  

Microsoft Academic Search

The effects of computer-mediated communication (CMC) have been investigated within two primary research streams: task-oriented and relationship- oriented perspectives. Due to the different perspectives, as we identified, a theoretical gap exists in the CMC domain. The purpose of this paper is to combine the two different perspectives into a single unified model, thereby providing a more realistic and comprehensive understanding.

Ayoung Suh; Kyung-shik Shin

136

A Game-Theoretic Framework for Studying Truck Platooning Incentives Farhad Farokhi and Karl H. Johansson  

E-print Network

. Johansson Abstract-- An atomic congestion game with two types of agents, cars and trucks, is used to model of this game-theoretic model for the interaction between car traffic and truck platooning incentives taxing system in August, 2007 after a seven-month trial period between January­July, 2006. A survey

Johansson, Karl Henrik

137

Can Service-Learning Help Students Appreciate an Unpopular Course? A Theoretical Framework  

Microsoft Academic Search

A theoretical model is presented that proposes a mechanism through which service-learning can improve students' attitudes toward a course. The model suggests that service-learning projects have an effect on students' perception of the course material's usefulness, and that higher perceived usefulness, along with higher perceived ease of subject, leads to more favorable attitudes toward the course and stronger intentions for

Nicholas Evangelopoulos; Laura Riolli

138

A theoretical responsibility and accountability framework for CSR and global responsibility  

Microsoft Academic Search

Purpose – Responsibility and accountability are central to much of what managers do, but in the literature these complex social science concepts are confused. The paper aims to bring theoretical rigour, structure, consistency and parsimony to this field, using as an example the subcategories of responsibility referred to as corporate social responsibility (CSR) and global responsibility. Design\\/methodology\\/approach – This conceptual

Harald Bergsteiner; Gayle C. Avery

2010-01-01

139

Exploring Asynchrony as a Theoretical Framework for Understanding Giftedness: A Case of Cognitive Dissonance?  

ERIC Educational Resources Information Center

Asynchrony is a theoretical construct that views the intellectually gifted child as inherently vulnerable because of disparities arising from the mismatch between his or her chronological age and mental age. Such disparities, for example, between wanting to belong but being intellectually out of step with peers, are said to give rise to a…

Andronaco, Julie A.; Shute, Rosalyn; McLachlan, Angus

2014-01-01

140

A theoretical framework for the regulation of Shh morphogen-controlled gene expression  

PubMed Central

How morphogen gradients govern the pattern of gene expression in developing tissues is not well understood. Here, we describe a statistical thermodynamic model of gene regulation that combines the activity of a morphogen with the transcriptional network it controls. Using Sonic hedgehog (Shh) patterning of the ventral neural tube as an example, we show that the framework can be used together with the principled parameter selection technique of approximate Bayesian computation to obtain a dynamical model that accurately predicts tissue patterning. The analysis indicates that, for each target gene regulated by Gli, which is the transcriptional effector of Shh signalling, there is a neutral point in the gradient, either side of which altering the Gli binding affinity has opposite effects on gene expression. This explains recent counterintuitive experimental observations. The approach is broadly applicable and provides a unifying framework to explain the temporospatial pattern of morphogen-regulated gene expression. PMID:25294939

Cohen, Michael; Page, Karen M.; Perez-Carrasco, Ruben; Barnes, Chris P.; Briscoe, James

2014-01-01

141

The Developmental Effects of Early Life Stress: An Overview of Current Theoretical Frameworks  

PubMed Central

The field of psychobiology has two major theories for talking about stress and health: the allostatic load model, which grew out of biological and neuroscience approaches to understanding health and disease, and the adaptive calibration model, which developed out of an explicitly evolutionary-developmental framework. Both are based on assumptions that the brain coordinates a distributed and dynamic set of neural circuits that regulate behavior and stress physiology to help the organism adapt to the demands of the environment. Both models support the notion that experiences early in life are embedded into the regulation of stress systems in ways that shape the organism’s future responses. These two paradigms differ in their emphasis on whether changes in how stress systems function are viewed as adaptive or maladaptive. The goal of this review is to identify the strengths and weaknesses of each framework and to discuss some implications for future studies and for policy.

Hostinar, Camelia E.; Gunnar, Megan R.

2014-01-01

142

Applying an extended theoretical framework for data collection mode to health services research  

Microsoft Academic Search

BACKGROUND: Over the last 30 years options for collecting self-reported data in health surveys and questionnaires have increased with technological advances. However, mode of data collection such as face-to-face interview or telephone interview can affect how individuals respond to questionnaires. This paper adapts a framework for understanding mode effects on response quality and applies it to a health research context.

Michael R Robling; David K Ingledew; Giles Greene; Adrian Sayers; Chris Shaw; Lesley Sander; Ian T Russell; John G Williams; Kerenza Hood

2010-01-01

143

Supportive Non-Parental Adults and Adolescent Psychosocial Functioning: Using Social Support as a Theoretical Framework  

Microsoft Academic Search

Supportive Non-Parental Adults (SNPAs), or non-parental adults who provide social support to youth, are present in the lives\\u000a of many adolescents; yet to date, a guiding framework for organizing the existing literature on the provision of support provided\\u000a by multiple types of SNPAS, such as teachers, natural mentors, and extended family members, as well as to inform future research\\u000a efforts,

Emma M. Sterrett; Deborah J. Jones; Laura G. McKee; Carlye Kincaid

144

A Framework for Workgroup Collaboration in a Vir tual Environment: Theoretical Synthesis and Empir ical Exploration  

Microsoft Academic Search

Abstract The effects of computer-mediated communication (CMC) have,been,investigated within two,primary research,streams: task-oriented and,relationship- oriented perspectives. Due to the different perspectives, as we identified, a theoretical gap exists in the CMC domain. The purpose of this paper is to combine,the two different perspectives into a single unified model, thereby providing a more realistic and comprehensive understanding. The proposed,model predicts both task

Ayoung Suh; Kyung-shik Shin

2007-01-01

145

Game object model version II: a theoretical framework for educational game development  

Microsoft Academic Search

Complex computer and video games may provide a vehicle, based on appropriate theoretical concepts, to transform the educational\\u000a landscape. Building on the original game object model (GOM) a new more detailed model is developed to support concepts that\\u000a educational computer games should: be relevant, explorative, emotive, engaging, and include complex challenges; support authentic\\u000a learning activities that are designed as narrative

Alan Amory

2007-01-01

146

Dynamic decision making for dam-break emergency management - Part 1: Theoretical framework  

NASA Astrophysics Data System (ADS)

An evacuation decision for dam breaks is a very serious issue. A late decision may lead to loss of lives and properties, but a very early evacuation will incur unnecessary expenses. This paper presents a risk-based framework of dynamic decision making for dam-break emergency management (DYDEM). The dam-break emergency management in both time scale and space scale is introduced first to define the dynamic decision problem. The probability of dam failure is taken as a stochastic process and estimated using a time-series analysis method. The flood consequences are taken as functions of warning time and evaluated with a human risk analysis model (HURAM) based on Bayesian networks. A decision criterion is suggested to decide whether to evacuate the population at risk (PAR) or to delay the decision. The optimum time for evacuating the PAR is obtained by minimizing the expected total loss, which integrates the time-related probabilities and flood consequences. When a delayed decision is chosen, the decision making can be updated with available new information. A specific dam-break case study is presented in a companion paper to illustrate the application of this framework to complex dam-breaching problems.

Peng, M.; Zhang, L. M.

2013-02-01

147

Predicting child abuse potential: An empirical investigation of two theoretical frameworks  

PubMed Central

This study investigated two theoretical risk models predicting child maltreatment potential: 1) Belsky’s (1993) developmental-ecological model and 2) the cumulative risk model in a sample of 610 caregivers (49% African American, 46% European American; 53% single) with a child between 3 and 6 years old. Results extend the literature by using a widely accepted and valid risk instrument (i.e., CAPI) rather than occurrence rates (e.g., reports to child protective services, observations). Results indicated Belsky’s (1993) developmental-ecological model, in which risk markers were organized into three separate conceptual domains, provided a poor fit to the data. In contrast, the cumulative risk model, which included the accumulation of risk markers, was significant in predicting child abuse potential. PMID:20390812

Begle, Angela Moreland; Dumas, Jean E.; Hanson, Rochelle F.

2010-01-01

148

Empirical Social-Ecological System Analysis: From Theoretical Framework to Latent Variable Structural Equation Model  

NASA Astrophysics Data System (ADS)

The social-ecological system (SES) approach to natural resource management holds enormous promise towards achieving sustainability. Despite this promise, social-ecological interactions are complex and elusive; they require simplification to guide effective application of the SES approach. The complex, adaptive and place-specific nature of human-environment interactions impedes determination of state and trends in SES parameters of interest to managers and policy makers. Based on a rigorously developed systemic theoretical model, this paper integrates field observations, interviews, surveys, and latent variable modeling to illustrate the development of simplified and easily interpretable indicators of the state of, and trends in, relevant SES processes. Social-agricultural interactions in the Logone floodplain, in the Lake Chad basin, served as case study. This approach is found to generate simplified determinants of the state of SESs, easily communicable across the array of stakeholders common in human-environment interactions. The approach proves to be useful for monitoring SESs, guiding interventions, and assessing the effectiveness of interventions. It incorporates real time responses to biophysical change in understanding coarse scale processes within which finer scales are embedded. This paper emphasizes the importance of merging quantitative and qualitative methods for effective monitoring and assessment of SESs.

Asah, Stanley Tanyi

2008-12-01

149

Theoretical framework to analyze searches for hidden light gauge bosons in electron scattering fixed target experiments  

NASA Astrophysics Data System (ADS)

Motivated by anomalies in cosmic ray observations and by attempts to solve questions of the Standard Model of particle physics like the (g-2)? discrepancy, U(1) extensions of the Standard Model have been proposed in recent years. Such U(1) extensions allow for the interaction of dark matter by exchange of a photonlike massive force carrier ?' not included in the Standard Model. In order to search for ?' bosons, various experimental programs have been started. One approach is the dedicated search at fixed-target experiments at modest energies as performed at microtron (MAMI) or at the Jefferson Lab. In these experiments the process e(A,Z)?e(A,Z)l+l- is investigated, and a search for a very narrow resonance in the invariant mass distribution of the l+l- pair is performed. In this work we analyze this process in terms of signal and background in order to describe existing data obtained by the A1 experiment at MAMI with the aim to give accurate predictions for exclusion limits in the ?' parameter space. We present a detailed theoretical analysis of the cross sections entering in the description of such processes.

Beranek, T.; Merkel, H.; Vanderhaeghen, M.

2013-07-01

150

Highly effective hydrogen isotope separation in nanoporous metal-organic frameworks with open metal sites: direct measurement and theoretical analysis.  

PubMed

Separating gaseous mixtures that consist of very similar size is one of the critical issues in modern separation technology. Especially, the separation of the isotopes hydrogen and deuterium requires special efforts, even though these isotopes show a very large mass ratio. Conventionally, H/D separation can be realized through cryogenic distillation of the molecular species or the Girdler-sulfide process, which are among the most energy-intensive separation techniques in the chemical industry. However, costs can be significantly reduced by using highly mass-selective nanoporous sorbents. Here, we describe a hydrogen isotope separation strategy exploiting the strongly attractive open metal sites present in nanoporous metal-organic frameworks of the CPO-27 family (also referred to as MOF-74). A theoretical analysis predicts an outstanding hydrogen isotopologue separation at open metal sites due to isotopal effects, which has been directly observed through cryogenic thermal desorption spectroscopy. For H2/D2 separation of an equimolar mixture at 60 K, the selectivity of 12 is the highest value ever measured, and this methodology shows extremely high separation efficiencies even above 77 K. Our theoretical results imply also a high selectivity for HD/H2 separation at similar temperatures, and together with catalytically active sites, we propose a mechanism to produce D2 from HD/H2 mixtures with natural or enriched deuterium content. PMID:24359584

Oh, Hyunchul; Savchenko, Ievgeniia; Mavrandonakis, Andreas; Heine, Thomas; Hirscher, Michael

2014-01-28

151

Understanding the Canadian adult CT head rule trial: use of the theoretical domains framework for process evaluation  

PubMed Central

Background The Canadian CT Head Rule was prospectively derived and validated to assist clinicians with diagnostic decision-making regarding the use of computed tomography (CT) in adult patients with minor head injury. A recent intervention trial failed to demonstrate a decrease in the rate of head CTs following implementation of the rule in Canadian emergency departments. Yet, the same intervention, which included a one-hour educational session and reminders at the point of requisition, was successful in reducing cervical spine imaging rates in the same emergency departments. The reason for the varied effect of the intervention across these two behaviours is unclear. There is an increasing appreciation for the use of theory to conduct process evaluations to better understand how strategies are linked with outcomes in implementation trials. The Theoretical Domains Framework (TDF) has been used to explore health professional behaviour and to design behaviour change interventions but, to date, has not been used to guide a theory-based process evaluation. In this proof of concept study, we explored whether the TDF could be used to guide a retrospective process evaluation to better understand emergency physicians’ responses to the interventions employed in the Canadian CT Head Rule trial. Methods A semi-structured interview guide, based on the 12 domains from the TDF, was used to conduct telephone interviews with project leads and physician participants from the intervention sites in the Canadian CT Head Rule trial. Two reviewers independently coded the anonymised interview transcripts using the TDF as a coding framework. Relevant domains were identified by: the presence of conflicting beliefs within a domain; the frequency of beliefs; and the likely strength of the impact of a belief on the behaviour. Results Eight physicians from four of the intervention sites in the Canadian CT Head Rule trial participated in the interviews. Barriers likely to assist with understanding physicians’ responses to the intervention in the trial were identified in six of the theoretical domains: beliefs about consequences; beliefs about capabilities; behavioural regulation; memory, attention and decision processes; environmental context and resources; and social influences. Despite knowledge that the Canadian CT Head Rule was highly sensitive and reliable for identifying clinically important brain injuries and strong beliefs about the benefits for using the rule, a number of barriers were identified that may have prevented physicians from consistently applying the rule. Conclusion This proof of concept study demonstrates the use of the TDF as a guiding framework to design a retrospective theory-based process evaluation. There is a need for further development and testing of methods for using the TDF to guide theory-based process evaluations running alongside behaviour change intervention trials. PMID:23433082

2013-01-01

152

'It's a can of worms': understanding primary care practitioners' behaviours in relation to HPV using the theoretical domains framework  

PubMed Central

Background The relationship between infection with high-risk human papillomavirus (HPV) and cervical cancer is transforming cervical cancer prevention. HPV tests and vaccinations have recently become available. In Ireland, as elsewhere, primary care practitioners play a key role in prevention. ATHENS (A Trial of HPV Education and Support) aims to develop a theory-based intervention to support primary care practitioners in their HPV-related practice. This study, the first step in the intervention development process, aimed to: identify HPV-related clinical behaviours that the intervention will target; clarify general practitioners’ (GPs’) and practice nurses’ roles and responsibilities; and determine factors that potentially influence clinical behaviour. A secondary objective was to informally assess the utility of the Theoretical Domains Framework (TDF) in understanding clinical behaviours in an area with an evolving evidence-base. Methods In-depth semi-structured telephone interviews were conducted with GPs and practice nurses. The topic guide, which contained open questions and HPV-related clinical scenarios, was developed through literature review and clinical experience. Interview transcripts were content-analysed using the TDF as the coding framework. Results 19 GPs and 14 practice nurses were interviewed. The major HPV-related clinical behaviours were: initiating a discussion about HPV infection with female patients; offering/recommending HPV vaccination to appropriate patients; and answering patients’ questions about HPV testing. While the responsibility for taking smears was considered a female role, both male and female practitioners dealt with HPV-related issues. All 12 theoretical domains arose in relation to HPV infection; the domains judged to be most important were: knowledge, emotion, social influences, beliefs about capabilities and beliefs about consequences. Eleven domains emerged in relation to HPV vaccination, with beliefs about consequences, social influences, knowledge and environmental context and resources judged to be the most important. Nine domains were relevant to HPV testing, with knowledge and beliefs about capabilities judged to be the most important. Conclusions The findings confirm the need for an intervention to support primary care practitioners around HPV and suggest it should target a range of theoretical domains. The TDF proved valuable in analysing qualitative data collected using a topic guide not specifically designed to capture TDF domains and understanding clinical behaviours in an area with an evolving evidence-base. PMID:22862968

2012-01-01

153

Understanding diagnosis and management of dementia and guideline implementation in general practice: a qualitative study using the theoretical domains framework  

PubMed Central

Background Dementia is a growing problem, causing substantial burden for patients, their families, and society. General practitioners (GPs) play an important role in diagnosing and managing dementia; however, there are gaps between recommended and current practice. The aim of this study was to explore GPs’ reported practice in diagnosing and managing dementia and to describe, in theoretical terms, the proposed explanations for practice that was and was not consistent with evidence-based guidelines. Methods Semi-structured interviews were conducted with GPs in Victoria, Australia. The Theoretical Domains Framework (TDF) guided data collection and analysis. Interviews explored the factors hindering and enabling achievement of 13 recommended behaviours. Data were analysed using content and thematic analysis. This paper presents an in-depth description of the factors influencing two behaviours, assessing co-morbid depression using a validated tool, and conducting a formal cognitive assessment using a validated scale. Results A total of 30 GPs were interviewed. Most GPs reported that they did not assess for co-morbid depression using a validated tool as per recommended guidance. Barriers included the belief that depression can be adequately assessed using general clinical indicators and that validated tools provide little additional information (theoretical domain of ‘Beliefs about consequences’); discomfort in using validated tools (‘Emotion’), possibly due to limited training and confidence (‘Skills’; ‘Beliefs about capabilities’); limited awareness of the need for, and forgetting to conduct, a depression assessment (‘Knowledge’; ‘Memory, attention and decision processes’). Most reported practising in a manner consistent with the recommendation that a formal cognitive assessment using a validated scale be undertaken. Key factors enabling this were having an awareness of the need to conduct a cognitive assessment (‘Knowledge’); possessing the necessary skills and confidence (‘Skills’; ‘Beliefs about capabilities’); and having adequate time and resources (‘Environmental context and resources’). Conclusions This is the first study to our knowledge to use a theoretical approach to investigate the barriers and enablers to guideline-recommended diagnosis and management of dementia in general practice. It has identified key factors likely to explain GPs’ uptake of the guidelines. The results have informed the design of an intervention aimed at supporting practice change in line with dementia guidelines, which is currently being evaluated in a cluster randomised trial. PMID:24581339

2014-01-01

154

The Analysis on Influence of Main Factors on Theoretical Value of Energy Saving Rate for Energy Efficiency Labeling of Civil Buildings  

NASA Astrophysics Data System (ADS)

For typical residential buildings, no-large-scale and large-scale public buildings, according to China's Technical Guide for the Energy Efficiency Labeling of Civil Buildings, makes up missing data of the calculation benchmark and determines the boundary conditions for calculating the theoretical values of civil building energy efficiency. Based on equivalent full load hours method, develops a modular program and calculates building energy consumption for the demands of dynamic cooling and heating and lighting etc., finds out the corresponding relationship between star level's theoretical value of energy saving rate and specified-term limiting value in the Guide. With orthogonal experimental design and multiple linear regression, establishes the quantitative function of both the theoretical value of energy saving rate and main factors parameters, analyzes the impact of the control parameter on energy saving rate, and reveals the law of theoretical value of energy saving rate variation with the control parameter. For building energy efficiency labeling upgrade, presents technical measure need to be taken and analyses its feasibility. The results from the study can provide theoretical guidance for energy-saving design or retrofitting of civil buildings.

Wang, Zhiwei; Wang, Zhenling; Jiang, Bo; Zhang, Fan; Li, Peng; Cao, Wei

155

The Maine Savvy Caregiver Project: translating an evidence-based dementia family caregiver program within the RE-AIM Framework.  

PubMed

This article presents findings of a 3-year Savvy Caregiver Program translational study designed with the RE-AIM framework to create a statewide sustainable infrastructure and improve dementia family caregiver outcomes in one rural state. The RE-AIM dimensions--reach, effectiveness, adoption, implementation and maintenance--were evaluated using mixed methods. The program reached 770 caregivers and 87.7% (n = 676) participated in the study with 60.5% (n = 409) residing in rural locations. Participants demonstrated improved confidence, fewer depressive symptoms, and better managed their situation. Trainer resources, partnerships, and adequate planning were essential for program adoption and sustainability. Implications for replication are discussed. PMID:24830961

Samia, Linda W; Aboueissa, AbouEl-Makarim; Halloran, Jan; Hepburn, Kenneth

2014-01-01

156

A theoretical framework for quantifying the relative importance of dissolution and mechanical erosion in soluble bedrock channels  

NASA Astrophysics Data System (ADS)

Models of erosion in surface streams typically assume that the rates of stream incision via dissolution are negligibly small in comparison to mechanical erosion rates. On the contrary, numerical models of the formation and evolution of cave channels in karst landscapes have not typically considered mechanical processes. The disconnect in the assumptions made by these two communities is indicative of a switch in the importance of these two types of processes as channels grow. However, the parameters that control this switch, and the typical settings in which chemical or mechanical incision will dominate are unknown. Here we construct a theoretical framework to allow a systematic study of the role of climatic and lithological factors in controlling the relative importance of dissolution and mechanical processes in channels in highly soluble rock. We begin by characterizing the relationship between saturation state and discharge in a wide variety of streams using data from the USGS Water Quality database. Using this characterization, we have developed a stochastic model for dissolution in streams that enables calculation of rates averaged over all discharges. This model is compared against similar models for mechanical erosion that employ a stream power erosion law. The model shows that at sufficiently high discharges, or shear stresses, mechanical erosion dominates. Similarly, channel dissolution is relatively insensitive to extreme events. However, at low discharges, significant dissolution can occur if the stream is undersaturated. Consequently, the average saturation state of the stream, the critical threshold for the onset of mechanical erosion, and the time distribution of discharges all play crucial roles. We conclude with a preliminary examination of the distribution of characteristic chemical and mechanical erosion features within soluble bedrock channels as a function of lithological, hydraulic, chemical, and sediment properties.

Covington, M. D.; Gabrovšek, F.; Gulley, J. D.

2013-12-01

157

River restoration in Spain: theoretical and practical approach in the context of the European water framework directive.  

PubMed

River restoration is becoming a priority in many countries because of increasing the awareness of environmental degradation. In Europe, the EU Water Framework Directive (WFD) has significantly reinforced river restoration, encouraging the improvement of ecological status for water bodies. To fulfill the WFD requirements, the Spanish Ministry of the Environment developed in 2006 a National Strategy for River Restoration whose design and implementation are described in this paper. At the same time many restoration projects have been conducted, and sixty of them have been evaluated in terms of stated objectives and pressures and implemented restoration measures. Riparian vegetation enhancement, weir removal and fish passes were the most frequently implemented restoration measures, although the greatest pressures came from hydrologic alteration caused by flow regulation for irrigation purposes. Water deficits in quantity and quality associated with uncontrolled water demands seriously affect Mediterranean rivers and represent the main constraint to achieving good ecological status of Spanish rivers, most of them intensively regulated. Proper environmental allocation of in-stream flows would need deep restrictions in agricultural water use which seem to be of very difficult social acceptance. This situation highlights the need to integrate land-use and rural development policies with water resources and river management, and identifies additional difficulties in achieving the WFD objectives and good ecological status of rivers in Mediterranean countries. PMID:22569704

González Del Tánago, Marta; García de Jalón, Diego; Román, Mercedes

2012-07-01

158

Towards a Theoretical Framework for the Comparative Understanding of Globalisation, Higher Education, the Labour Market and Inequality  

ERIC Educational Resources Information Center

This paper is a theoretical examination of three major empirical trends that affect many people: globalisation, increasingly close relations between higher education (HE) and labour markets, and increasing social inequality. Its aim is to identify key theoretical resources and their contribution to the development of a comparative theoretical

Kupfer, Antonia

2011-01-01

159

Evaluating the successful implementation of evidence into practice using the PARiHS framework: theoretical and practical challenges  

Microsoft Academic Search

BACKGROUND: The PARiHS framework (Promoting Action on Research Implementation in Health Services) has proved to be a useful practical and conceptual heuristic for many researchers and practitioners in framing their research or knowledge translation endeavours. However, as a conceptual framework it still remains untested and therefore its contribution to the overall development and testing of theory in the field of

Alison L Kitson; Jo Rycroft-Malone; Gill Harvey; Brendan McCormack; Kate Seers; Angie Titchen

2008-01-01

160

EXPLAINING THE CHOICE OF IT GOVERNANCE MODES MADE BY ORGANIZATIONS FROM THE INSTITUTIONAL PERSPECTIVE: A THEORETICAL FRAMEWORK DEVELOPMENT 1  

Microsoft Academic Search

This study uses the institutional theory as a lens for explaining choice of IT govern ance modes in organizations. Reasons are given to show how an IT governance mode can in itself be considered a legitimized institution. A conceptual framework is then developed, and several hypotheses are presented. The framework considers the IT governanc e modes from a non -rational

Ben Boubaker

161

A Highly Consistent Framework for the Evolution of the Star-Forming "Main Sequence" from z~0-6  

E-print Network

Using a compilation of 25 studies from the literature, we investigate the evolution of the star-forming galaxy (SFG) Main Sequence (MS) in stellar mass and star formation rate (SFR) out to $z \\sim 6$. These studies encompass both stacked and non-stacked data as well as many SFR indicators/timescales and selection methods. After converting all observations to a common set of calibrations, we find a remarkable consensus among MS observations ($\\sim 0.1$ dex 1$\\sigma$ interpublication scatter). By fitting for time evolution of the MS in bins of constant mass, we are able to deconvolve the observed scatter about the MS within each observed redshift bins. After accounting for observed scatter between different SFR indicators, we find the width of the MS distribution is $\\sim 0.2$ dex and remains constant over cosmic time. Our fits indicate the slope of the MS is likely time-dependent, with our best fit $\\log\\textrm{SFR}(M_*,t) = \\left(0.83 \\pm 0.03 - 0.027 \\pm 0.004 \\times t\\right) \\log M_* - \\left(6.38 \\pm 0.27 -...

Speagle, Joshua S; Capak, Peter L; Silverman, John D

2014-01-01

162

Depressive symptoms in the Netherlands 1975–1996: a theoretical framework and an empirical analysis of socio-demographic characteristics, gender differences and changes over time  

Microsoft Academic Search

This article examines the longitudinal trend of depressive symptoms in the Netherlands, using large-scale national data recorded over the period 1975-1996. Our analyses showed fluctuations in the overall longitudinal trend. On the basis of a general theoretical framework, we formulated hypotheses concerning which socio-demographic characteristics determine the likelihood of suffering from depressive symptoms and how these associations might have changed

Vivian Vivian Meertens; Peer Scheepers; Bert Tax

2003-01-01

163

A Highly Consistent Framework for the Evolution of the Star-Forming "Main Sequence" from z ~ 0-6  

NASA Astrophysics Data System (ADS)

Using a compilation of 25 studies from the literature, we investigate the evolution of the star-forming galaxy (SFG) main sequence (MS) in stellar mass and star formation rate (SFR) out to z ~ 6. After converting all observations to a common set of calibrations, we find a remarkable consensus among MS observations (~0.1 dex 1? interpublication scatter). By fitting for time evolution of the MS in bins of constant mass, we deconvolve the observed scatter about the MS within each observed redshift bin. After accounting for observed scatter between different SFR indicators, we find the width of the MS distribution is ~0.2 dex and remains constant over cosmic time. Our best fits indicate the slope of the MS is likely time-dependent, with our best-fit log SFR(M *, t) = (0.84 ± 0.02 – 0.026 ± 0.003 × t)log M * – (6.51 ± 0.24 – 0.11 ± 0.03 × t), where t is the age of the universe in Gyr. We use our fits to create empirical evolutionary tracks in order to constrain MS galaxy star formation histories (SFHs), finding that (1) the most accurate representations of MS SFHs are given by delayed-? models, (2) the decline in fractional stellar mass growth for a "typical" MS galaxy today is approximately linear for most of its lifetime, and (3) scatter about the MS can be generated by galaxies evolving along identical evolutionary tracks assuming an initial 1? spread in formation times of ~1.4 Gyr.

Speagle, J. S.; Steinhardt, C. L.; Capak, P. L.; Silverman, J. D.

2014-10-01

164

Can an analysis of the contrast between pre-Galilean and Newtonian theoretical frameworks help students develop a scientific mindset?  

NSDL National Science Digital Library

This study examines a course in which students use two writing activities and collaborative group activities to examine the conceptual structure of the calculus-based introductory Physics course. Students are presented with two alternative frameworks; pre-Galilean Physics and Newtonian Physics. The idea of the course design is that students would at first view the frameworks almost in a theatrical sense as a view of a drama involving a conflict of actors;Aristotle, Galileo, Newton and others occurring a long time ago. As participants passing through a series of interventions, the students become aware that the frameworks relate concepts from different parts of the course and learn to evaluate the two alternative frameworks. They develop a scientific mindset changing their outlook on the course material from the viewpoint that it consists of a tool kit of assorted practices, classified according to problem type, to the viewpoint that it comprises a connected structure of concepts.

Kalman, Calvin S.; Aulls, Mark W.

2013-05-28

165

A Theoretical and Practical Framework for Service-Learning in Marketing: Kolb’s Experiential Learning Cycle  

Microsoft Academic Search

The purpose of this article is to provide a framework for the design and implementation of service-learning courses in marketing. First, this article describes an experiential learning framework to be used as a guide for planning, designing, implementing, and evaluating a service-learning course. Second, this article specifies in detail service-learning implementation strategies for particular marketing courses. Third, this article describes

Ed Petkus

2000-01-01

166

Developing a Theoretical Framework to Illustrate Associations Among Patient Satisfaction, Body Image and Quality of Life for Women Undergoing Breast Reconstruction  

PubMed Central

Within the field of breast reconstruction there is increasing focus on patient-reported outcomes related to satisfaction, body image, and quality of life. These outcomes are deemed highly relevant because the primary goal of breast reconstruction is to recreate the appearance of a breast (or breasts) that is satisfying to the patient. Prominent researchers have suggested the need to develop improved standards for outcome evaluation which can ultimately benefit patients as well as physicians. The purpose of this article is to summarize key findings in the area of patient-reported outcomes for breast reconstruction and introduce a theoretical framework for advancing research in this field. We conducted an extensive literature review of outcome studies for breast reconstruction focusing on patient-reported results. We developed a theoretical framework illustrating core patient-reported outcomes related to breast reconstruction and factors associated with these outcomes. Our theoretical model highlights domains and distinguishing features of patient satisfaction, body image, and quality of life outcomes for women undergoing breast reconstruction. This model further identifies a broad range of variables (e.g., historical/premorbid influences, disease and treatment-related factors) that have been found to influence patient-reported outcomes and need to be taken into consideration when designing future research in this area. Additional attention is given to examining the relationship between patient reported outcomes and outside evaluation of breast reconstruction. Our proposed theoretical framework suggests key opportunities to expand research in this area with the goal of optimizing body image adjustment, satisfaction, and psychosocial outcomes for the individual patient. PMID:23380309

Fingeret, Michelle Cororve; Nipomnick, Summer; Crosby, Melissa A.; Reece, Gregory P.

2013-01-01

167

Theoretical Foundations of Conducting Needs Analysis for Performance Improvement in Organizations: Definition Clarification and a Framework for Action.  

ERIC Educational Resources Information Center

Clarifies the basic terminology of needs analysis, proposes a framework for conducting needs analyses, and discusses trends and issues in needs analysis as they apply to improving performance in organizations. Topics include needs; needs assessment; needs analysis; training requirements analysis; needs analysis plan; perception analysis, including…

Pershing, James A.; Lee, Sung Heum; Chung, Jaesam

2000-01-01

168

Organizational Culture and Organizational Effectiveness: A Meta-Analytic Investigation of the Competing Values Framework's Theoretical Suppositions  

ERIC Educational Resources Information Center

We apply Quinn and Rohrbaugh's (1983) competing values framework (CVF) as an organizing taxonomy to meta-analytically test hypotheses about the relationship between 3 culture types and 3 major indices of organizational effectiveness (employee attitudes, operational performance [i.e., innovation and product and service quality], and financial…

Hartnell, Chad A.; Ou, Amy Yi; Kinicki, Angelo

2011-01-01

169

The mathematical framework of Stone duality is used to synthesize a number of hitherto separate developments in Theoretical Computer Science  

E-print Network

; The mathematical framework of Stone duality is used to synthesize a number of hitherto separate developments, Hennessy based on operational semantics. Logics of programs. Stone duality provides a junction between by showing that they are Stone duals of each other. Hence, semantics and logic are guaranteed

Abramsky, Samson

170

Uses of quantum measurements: Conceptual\\/theoretical frameworks for measurements and collapse-free posterior value ascriptions  

Microsoft Academic Search

The dissertation lays out a conceptual framework for measurements equipped with explicit definitions and characterizations of important concepts and elements related to measurement. Its key concepts are: a measurement is 'used' when a value is ascribed to the measured observable based on its outcome; if a measurement reveals the value of the measured observable possessed by the object system before\\/after

Chunghyoung Lee

2006-01-01

171

A Noncooperative Game-Theoretic Framework for Radio Resource Management in 4G Heterogeneous Wireless Access Networks  

Microsoft Academic Search

Fourth generation (4G) wireless networks will provide high-bandwidth connectivity with quality-of-service (QoS) support to mobile users in a seamless manner. In such a scenario, a mobile user will be able to connect to different wireless access networks such as a wireless metropolitan area network (WMAN), a cellular network, and a wireless local area network (WLAN) simultaneously. We present a game-theoretic

Dusit Niyato; Ekram Hossain

2008-01-01

172

Theoretical assessment of the elastic constants and hydrogen storage capacity of some metal-organic framework materials.  

PubMed

Metal-organic frameworks (MOFs) are promising materials for applications such as separation, catalysis, and gas storage. A key indicator of their structural stability is the shear modulus. By density functional theory calculations in a 106-atom supercell, under the local density approximation, we find c(11)=29.2 GPa and c(12)=13.1 GPa for Zn-based MOF 5. However, we find c(44) of MOF-5 to be exceedingly small, only 1.4 GPa at T=0 K. The binding energy E(ads) of a single hydrogen molecule in MOF-5 is evaluated using the same setup. We find it to be -0.069 to -0.086 eVH(2) near the benzene linker and -0.106 to -0.160 eVH(2) near the Zn(4)O tetrahedra. Substitutions of chlorine and hydroxyl in the benzene linker have negligible effect on the physisorption energies. Pentacoordinated copper (and aluminum) in a framework structure similar to MOF-2 gives E(ads) approximately -0.291 eVH(2) (and -0.230 eVH(2)), and substitution of nitrogen in benzene (pyrazine) further enhances E(ads) near the organic linker to -0.16 eVH(2), according to density functional theory with local density approximation. PMID:16965046

Samanta, Amit; Furuta, Terumi; Li, Ju

2006-08-28

173

Theoretical assessment of the elastic constants and hydrogen storage capacity of some metal-organic framework materials  

NASA Astrophysics Data System (ADS)

Metal-organic frameworks (MOFs) are promising materials for applications such as separation, catalysis, and gas storage. A key indicator of their structural stability is the shear modulus. By density functional theory calculations in a 106-atom supercell, under the local density approximation, we find c11=29.2GPa and c12=13.1GPa for Zn-based MOF 5. However, we find c44 of MOF-5 to be exceedingly small, only 1.4GPa at T =0K. The binding energy Eads of a single hydrogen molecule in MOF-5 is evaluated using the same setup. We find it to be -0.069to-0.086eV/H2 near the benzene linker and -0.106to-0.160eV/H2 near the Zn4O tetrahedra. Substitutions of chlorine and hydroxyl in the benzene linker have negligible effect on the physisorption energies. Pentacoordinated copper (and aluminum) in a framework structure similar to MOF-2 gives Eads?-0.291eV/H2 (and -0.230eV/H2), and substitution of nitrogen in benzene (pyrazine) further enhances Eads near the organic linker to -0.16eV/H2, according to density functional theory with local density approximation.

Samanta, Amit; Furuta, Terumi; Li, Ju

2006-08-01

174

On the coupling of wave and three-dimensional circulation models: Choice of theoretical framework, practical implementation and adiabatic tests  

NASA Astrophysics Data System (ADS)

Many theoretical approaches and implementations have been proposed for the coupling of the three-dimensional ocean circulation with waves. The theoretical models are reviewed and it is shown that the formulation in terms of the quasi-Eulerian velocity circumvents the essential difficulty of alternative formulations for the Lagrangian mean velocity. Namely, models based on this Lagrangian velocity require an estimation of wave-induced motions to first order in the horizontal gradients of the wave field in order to estimate the vertical flux of wave pseudo-momentum. So far, only three-dimensional wave models have been able to provide these estimates, and all published theories based on the simpler Airy theory are not consistent at the leading order, because they ignore or incorrectly estimate the vertical momentum flux. With an adiabatic example on a sloping bottom it is shown that this inconsistency produces very large spurious velocities. These errors are independent of the slope for the inviscid case, and are still significant when a realistic vertical mixing is applied. A quick diagnostic of the potential accuracy of a theoretical model is the vertical profile of the wave-induced forcing terms: if it is not uniform over depth in adiabatic conditions then it will produce spurious artificial flow patterns in conditions with shoaling waves. Although conceptually more challenging, the quasi-Eulerian velocity theories only introduce minor modifications of the solution procedure for the standard primitive equations: a modification of the surface boundary condition for the mass conservation, the addition of the Stokes drift in the tracer advection equations, and sources of momentum and turbulent kinetic energy with associated surface and bottom fluxes. All the necessary modifications of primitive equation models are given in detail. This implementation is illustrated with the MARS3D model, which passes the test of the adiabatic shoaling waves.

Bennis, Anne-Claire; Ardhuin, Fabrice; Dumas, Franck

175

Balancing the costs of carbon gain and water transport: testing a new theoretical framework for plant functional ecology.  

PubMed

A novel framework is presented for the analysis of ecophysiological field measurements and modelling. The hypothesis 'leaves minimise the summed unit costs of transpiration and carboxylation' predicts leaf-internal/ambient CO2 ratios (ci /ca ) and slopes of maximum carboxylation rate (Vcmax ) or leaf nitrogen (Narea ) vs. stomatal conductance. Analysis of data on woody species from contrasting climates (cold-hot, dry-wet) yielded steeper slopes and lower mean ci /ca ratios at the dry or cold sites than at the wet or hot sites. High atmospheric vapour pressure deficit implies low ci /ca in dry climates. High water viscosity (more costly transport) and low photorespiration (less costly photosynthesis) imply low ci /ca in cold climates. Observed site-mean ci /ca shifts are predicted quantitatively for temperature contrasts (by photorespiration plus viscosity effects) and approximately for aridity contrasts. The theory explains the dependency of ci /ca ratios on temperature and vapour pressure deficit, and observed relationships of leaf ?(13) C and Narea to aridity. PMID:24215231

Prentice, I Colin; Dong, Ning; Gleason, Sean M; Maire, Vincent; Wright, Ian J

2014-01-01

176

Barriers and enablers to delivery of the Healthy Kids Check: an analysis informed by the Theoretical Domains Framework and COM-B model  

PubMed Central

Background More than a fifth of Australian children arrive at school developmentally vulnerable. To counteract this, the Healthy Kids Check (HKC), a one-off health assessment aimed at preschool children, was introduced in 2008 into Australian general practice. Delivery of services has, however, remained low. The Theoretical Domains Framework, which provides a method to understand behaviours theoretically, can be condensed into three core components: capability, opportunity and motivation, and the COM-B model. Utilising this system, this study aimed to determine the barriers and enablers to delivery of the HKC, to inform the design of an intervention to promote provision of HKC services in Australian general practice. Methods Data from 6 focus group discussions with 40 practitioners from general practices in socio-culturally diverse areas of Melbourne, Victoria, were analysed using thematic analysis. Results Many practitioners expressed uncertainty regarding their capabilities and the practicalities of delivering HKCs, but in some cases HKCs had acted as a catalyst for professional development. Key connections between immunisation services and delivery of HKCs prompted practices to have systems of recall and reminder in place. Standardisation of methods for developmental assessment and streamlined referral pathways affected practitioners’ confidence and motivation to perform HKCs. Conclusion Application of a systematic framework effectively demonstrated how a number of behaviours could be targeted to increase delivery of HKCs. Interventions need to target practice systems, the support of office staff and referral options, as well as practitioners’ training. Many behavioural changes could be applied through a single intervention programme delivered by the primary healthcare organisations charged with local healthcare needs (Medicare Locals) providing vital links between general practice, community and the health of young children. PMID:24886520

2014-01-01

177

Back to the basics: identifying positive youth development as the theoretical framework for a youth drug prevention program in rural Saskatchewan, Canada amidst a program evaluation  

PubMed Central

Background Despite endorsement by the Saskatchewan government to apply empirically-based approaches to youth drug prevention services in the province, programs are sometimes delivered prior to the establishment of evidence-informed goals and objectives. This paper shares the 'preptory’ outcomes of our team’s program evaluation of the Prince Albert Parkland Health Region Mental Health and Addiction Services’ Outreach Worker Service (OWS) in eight rural, community schools three years following its implementation. Before our independent evaluation team could assess whether expectations of the OWS were being met, we had to assist with establishing its overarching program goals and objectives and 'at-risk’ student population, alongside its alliance with an empirically-informed theoretical framework. Methods A mixed-methods approach was applied, beginning with in-depth focus groups with the OWS staff to identify the program’s goals and objectives and targeted student population. These were supplemented with OWS and school administrator interviews and focus groups with school staff. Alignment with a theoretical focus was determined though a review of the OWS’s work to date and explored in focus groups between our evaluation team and the OWS staff and validated with the school staff and OWS and school administration. Results With improved understanding of the OWS’s goals and objectives, our evaluation team and the OWS staff aligned the program with the Positive Youth Development theoretical evidence-base, emphasizing the program’s universality, systems focus, strength base, and promotion of assets. Together we also gained clarity about the OWS’s definition of and engagement with its 'at-risk’ student population. Conclusions It is important to draw on expert knowledge to develop youth drug prevention programming, but attention must also be paid to aligning professional health care services with a theoretically informed evidence-base for evaluation purposes. If time does not permit for the establishment of evidence-informed goals and objectives at the start-up of a program, obtaining insight and expertise from program personnel and school staff and administrators can bring the program to a point where this can still be achieved and theoretical linkages made after a program has been implemented. This is a necessary foundation for measuring an intervention’s success. PMID:24148918

2013-01-01

178

Theoretical framework to estimate spatial rainfall averages conditional on river discharges and point rainfall measurements from a single location: an application to western Greece  

NASA Astrophysics Data System (ADS)

We focus on the special case of catchments covered by a single rain gauge and develop a theoretical framework to obtain estimates of spatial rainfall averages conditional on rainfall measurements from a single location, and the flow conditions at the catchment outlet. In doing so we use (a) statistical tools to identify and correct inconsistencies between daily rainfall occurrence and amount and the flow conditions at the outlet of the basin; (b) concepts from multifractal theory to relate the fraction of wet intervals in point rainfall measurements and that in spatial rainfall averages, while accounting for the shape and size of the catchment, the size, lifetime and advection velocity of rainfall-generating features and the location of the rain gauge inside the basin; and (c) semi-theoretical arguments to assure consistency between rainfall and runoff volumes at an inter-annual level, implicitly accounting for spatial heterogeneities of rainfall caused by orographic influences. In an application study, using point rainfall records from the Glafkos river basin in western Greece, we find the suggested approach to demonstrate significant skill in resolving rainfall-runoff incompatibilities at a daily level, while reproducing the statistics of spatial rainfall averages at both monthly and annual time scales, independent of the location of the rain gauge and the magnitude of the observed deviations between point rainfall measurements and spatial rainfall averages. The developed scheme should serve as an important tool for the effective calibration of rainfall-runoff models in basins covered by a single rain gauge and, also, improve hydrologic impact assessment at a river basin level under changing climatic conditions.

Langousis, A.; Kaleris, V.

2013-03-01

179

Theoretical framework to estimate spatially averaged rainfalls conditional on river discharges and point rainfall measurements from a single location: an application to Western Greece  

NASA Astrophysics Data System (ADS)

We focus on the special case of catchments covered by a single raingauge, and develop a theoretical framework to obtain estimates of spatial rainfall averages conditional on rainfall measurements from a single location, and the flow conditions at the catchment outlet. In doing so we use: (a) statistical tools to identify and correct inconsistencies between daily rainfall occurrence and amount and the flow conditions at the outlet of the basin, (b) concepts from multifractal theory to relate the fraction of wet intervals in point rainfall measurements and that in spatial rainfall averages, while accounting for the shape and size of the catchment, the size, lifetime and advection velocity of rainfall generating features and the location of the raingauge inside the basin, and (c) semi-theoretical arguments to assure consistency between rainfall and runoff volumes at an inter-annual level, implicitly accounting for spatial heterogeneities of rainfall caused by orographic influences. In an application study, using point rainfall records from Glafkos river basin in Western Greece, we find the suggested approach to demonstrate significant skill in resolving rainfall-runoff incompatibilities at a daily level, while reproducing the statistics of spatial rainfall averages at both monthly and annual time scales, independently of the location of the raingauge and the magnitude of the observed deviations between point rainfall measurements and spatial rainfall averages. The developed scheme should serve as an important tool for the effective calibration of rainfall-runoff models in basins covered by a single raingauge and, also, improve hydrologic impact assessment at a river basin level under changing climatic conditions.

Langousis, A.; Kaleris, V.

2012-11-01

180

INTRODUCTION: THEORETICAL FRAMEWORK AND IMPLICATIONS  

Microsoft Academic Search

N Asian countries which have the potential for achieving self-sufficiency in staple foods, agricultural development is in a period of transition. Agricultural development in Asia since the 1980s has been characterized by the diversifica- tion of agriculture, and structural adjustment policies have been undertaken in many Asian countries during this period under the guidance of the World Bank (5) and

Hitoshi YONEKURA

1995-01-01

181

Effect of temperature on formation of two new lanthanide metal-organic frameworks: Synthesis, characterization and theoretical studies of Tm(III)-succinate  

NASA Astrophysics Data System (ADS)

Two new metal-organic frameworks (MOFs) have been synthesized under different hydrothermal conditions and characterized by single-crystal X-ray diffraction, infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy and elemental analysis. Compound 1, crystallized in space group P1¯ with the formula [Tm2(L)3(H2O)2]·H2O, (H2L=succinic acid), has triclinic cell parameters of a=7.61780(10), b=10.58050(10), c=12.71030(10), ?=95.3130(10), ?=107.4370(10), ?=111.0960(10) and a cell volume of 888.446(16) Å3. Compound 2, crystallized in space group I2/a with the same formula, is monoclinic, with cell parameters of a=13.77020(10), b=7.63170(10), c=17.2410(2), ?=101.303(10) and a cell volume of 1776.72(3) Å3. The results of this work indicate that a flexible succinate ligand that provides several modes of coordination can lead to different conformations, depending on the temperature used in the reaction. In the theoretical part of this study, semiempirical quantum chemistry methods using AM1, PM3 and PM6 models are employed to predict the structure of MOFs, calculate the geometric and crystallographic parameters, and make comparisons with experimental data.

de Oliveira, Carlos Alberto F.; da Silva, Fausthon Fred; Malvestiti, Ivani; Malta, Valéria Rodrigues dos S.; Dutra, José Diogo L.; da Costa, Nivan B.; Freire, Ricardo O.; Júnior, Severino A.

2013-01-01

182

Intersectorial health-related policies: the use of a legal and theoretical framework to propose a typology to a case study in a Brazilian municipality.  

PubMed

This article analyzes intersectorial health-related policies (IHRP) based on a case study performed in 2008-2009 that mapped the social policies of the city of Piracicaba, State of Sao Paulo, Brazil. The research strategy comprised quantitative and qualitative methodologies and converging information sources. Legal and theoretical conceptual frameworks were applied to the Piracicaba study results and served as the basis for proposing a typology of IHRP. Three types of IHRP were identified: health policies where the health sector is coordinator but needs non-health sectors to succeed; policies with a sector other than health as coordinator, but which needs health sector collaboration to succeed; and thirdly, genuine intersectorial policies, not led by any one sector but by a specifically-appointed intersectorial coordinator. The authors contend that political commitment of local authorities alone may not be enough to promote efficient intersectorial social policies. Comprehension of different types of IHRP and their interface mechanisms may contribute to greater efficiency and coverage of social policies that affect health equity and its social determinants positively. In the final analysis,, this will lead to more equitable health outcomes. PMID:25351311

Tess, Beatriz Helena; Aith, Fernando Mussa Abujamra

2014-11-01

183

[Mn(III)(Schiff base)]?[Re(IV)(CN)?], highly anisotropic 3D coordination framework: synthesis, crystal structure, magnetic investigations, and theoretical analysis.  

PubMed

A new highly anisotropic coordination heterobimetallic polymer [Mn(III)(Schiff-base)]3[Re(IV)(CN)7] was synthesized and characterized structurally and magnetically. The single crystal X-ray analysis has revealed that this is the first framework among the complexes composed of homoleptic cyanometallate and Mn(III) complex of the tetradentate Schiff base ligand. A formation of 3D assembly is possible due to both the pentagonal bipyrimidal geometry of the cyanometallate unit and suitable size of constituents: [Re(CN)7](3-) and [Mn(III)(acacen)](+), where acacen = N,N'-ethylenebis(acetylacetoneiminato). The powder and crystal magnetic studies show that the compound undergoes an antiferromagnetic ordering of a complicated character below Neel temperature of 13 K, and exhibits a metamagnetic behavior and strong magnetic anisotropy similar to those observed in related 3D Mn(II)-[Mo(CN)7](4-) systems. Unusual magnetic properties of [Mn(III)(acacen)]3[Re(IV)(CN)7] (1) originate from an interplay of Re-Mn anisotropic spin coupling and ZFS effect of Mn(III) ions with a noncollinear orientation of the local magnetic axes in the cyano-bridged 3D network. A theoretical model of anisotropic spin coupling between orbitally degenerate [Re(IV)(CN)7](3-) complexes and Mn(III) ions is developed, and specific microscopic mechanisms of highly anisotropic spin coupling in Re(IV)-CN-Mn(III) linkages in complex 1 are analyzed in detail. PMID:25250555

Samsonenko, Denis G; Paulsen, Carley; Lhotel, Elsa; Mironov, Vladimir S; Vostrikova, Kira E

2014-10-01

184

Implementation of pregnancy weight management and obesity guidelines: a meta-synthesis of healthcare professionals' barriers and facilitators using the Theoretical Domains Framework.  

PubMed

Obesity in pregnancy is rising and is associated with severe health consequences for both the mother and the child. There is an increasing international focus on guidelines to manage the clinical risks of maternal obesity, and for pregnancy weight management. However, passive dissemination of guidelines is not effective and more active strategies are required for effective guideline implementation into practice. Implementation of guidelines is a form of healthcare professional behaviour change, and therefore implementation strategies should be based on appropriate behaviour change theory. This systematic review aimed to identify the determinants of healthcare professionals' behaviours in relation to maternal obesity and weight management. Twenty-five studies were included. Data synthesis of the existing international qualitative and quantitative evidence base used the Theoretical Domains Framework to identify the barriers and facilitators to healthcare professionals' maternal obesity and weight management practice. The domains most frequently identified included 'knowledge', 'beliefs about consequences' and 'environmental context and resources'. Healthcare professionals' weight management practice had the most barriers compared with any other area of maternal obesity practice. The results of this review will be used to inform the development of an intervention to support healthcare professional behaviour change. PMID:24629076

Heslehurst, N; Newham, J; Maniatopoulos, G; Fleetwood, C; Robalino, S; Rankin, J

2014-06-01

185

BRITISH HOMELESSNESS: THEORETICAL PERSPECTIVES  

Microsoft Academic Search

Over the years many theories about homelessness have developed in the UK. The theories have both contributed to the understanding of homelessness and fuelled the homeless industry's push for more research. The research methods used and the outcomes of that research depend, to some degree, on the theoretical framework used. This paper argues that no single theoretical framework seems to

Megan Ravenhill

186

Effect of temperature on formation of two new lanthanide metal-organic frameworks: Synthesis, characterization and theoretical studies of Tm(III)-succinate  

SciTech Connect

Two new metal-organic frameworks (MOFs) have been synthesized under different hydrothermal conditions and characterized by single-crystal X-ray diffraction, infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy and elemental analysis. Compound 1, crystallized in space group P1-bar with the formula [Tm{sub 2}(L){sub 3}(H{sub 2}O){sub 2}]{center_dot}H{sub 2}O, (H{sub 2}L=succinic acid), has triclinic cell parameters of a=7.61780(10), b=10.58050(10), c=12.71030(10), {alpha}=95.3130(10), {beta}=107.4370(10), {gamma}=111.0960(10) and a cell volume of 888.446(16) A{sup 3}. Compound 2, crystallized in space group I2/a with the same formula, is monoclinic, with cell parameters of a=13.77020(10), b=7.63170(10), c=17.2410(2), {beta}=101.303(10) and a cell volume of 1776.72(3) A{sup 3}. The results of this work indicate that a flexible succinate ligand that provides several modes of coordination can lead to different conformations, depending on the temperature used in the reaction. In the theoretical part of this study, semiempirical quantum chemistry methods using AM1, PM3 and PM6 models are employed to predict the structure of MOFs, calculate the geometric and crystallographic parameters, and make comparisons with experimental data. - Graphical abstract: Scheme of obtaining [Tm{sub 2}(C{sub 4}H{sub 4}O{sub 4}){sub 3}(H{sub 2}O){sub 2}]H{sub 2}O in two different crystalline phases under the influence of reaction temperature. Highlights: Black-Right-Pointing-Pointer Was synthesized new MOFs based on Tm{sup 3+} ions and succinic acid in different temperature. Black-Right-Pointing-Pointer The change in the temperature leads to two compounds with different crystalline systems. Black-Right-Pointing-Pointer The Sparkle AM1, PM3 and PM6 models were used to comparison of the theoretical and experimental cell.

Oliveira, Carlos Alberto F. de; Silva, Fausthon Fred da; Malvestiti, Ivani [Department of Fundamental Chemistry, UFPE, 50590-470 Recife, PE (Brazil); Malta, Valeria Rodrigues dos S. [Institute of Chemistry and Biotechnology, UFAL, 57062-970 Maceio, AL (Brazil); Dutra, Jose Diogo L.; Costa, Nivan B. da; Freire, Ricardo O. [Department of Chemistry, UFS, 49100-000 Sao Cristovao, SE (Brazil); Junior, Severino A., E-mail: salvesjr@ufpe.br [Department of Fundamental Chemistry, UFPE, 50590-470 Recife, PE (Brazil)

2013-01-15

187

A cross-age study of students' conceptual understanding of interdependency in seed dispersal, pollination, and food chains using a constructivist theoretical framework  

NASA Astrophysics Data System (ADS)

The purpose of this research was to investigate students' understanding of interdependency across grade levels. Interdependency concepts selected for this study included food chains, pollination, and seed dispersal. Children's everyday concepts and scientific concepts across grade levels represented the focus of conceptual understanding. The researcher interviewed a total of 24 students across grade levels, six students each from grades 3, 7, and 10, and 6 college students. Data were collected by means of interviews and card sorts. A constructivist theoretical framework formed the groundwork for presenting the focus of this study and for interpreting the results of the interview data. Results were analyzed on the basis of identifying student responses to interview questions as either everyday concepts or as scientific concepts, along with transition through the zone of proximal development (ZPD) by mediation, as developed by Vygotsky. Results revealed that children across grade levels vary in their everyday and scientific understanding of the three interdependency concepts. Results for seed dispersal showed little evidence of understanding for grade 3, that is, seed dispersal was not within the zone of proximal development (ZPD) for grade 3 students. Students in grades 7 and 10 showed a developing transition within the zone of proximal development from everyday to scientific understanding, and college students demonstrated scientific understanding of seed dispersal. For pollination and food chains, results showed that grades 3, 7, and 10 were in transition from everyday to scientific understanding, and all college students demonstrated scientific understanding. The seed dispersal concept proved more complex than pollination and food chains. The findings of this study have implications for classroom teachers. By understanding the dynamic nature of the ZPD continuum for students, teachers can plan instruction to meet the needs of each student.

Smith, Shirley Mccraw

2003-06-01

188

Theoretical studies of massive stars. I - Evolution of a 15-solar-mass star from the zero-age main sequence to neon ignition  

NASA Technical Reports Server (NTRS)

The evolution of a star with mass 15 times that of the sun from the zero-age main sequence to neon ignition has been computed by the Henyey method. The hydrogen-rich envelope and all shell sources were explicitly included in the models. An algorithm has been developed for approximating the results of carbon burning, including the branching ratio for the C-12 + C-12 reaction and taking some secondary reactions into account. Penetration of the convective envelope into the core is found to be unimportant during the stages covered by the models. Energy transfer from the carbon-burning shell to the core by degenerate electron conduction becomes important after the core carbon-burning stage. Neon ignition will occur in a semidegenerate core and will lead to a mild 'flash.' Detailed numerical results are given in an appendix. Continuation of the calculations into later stages and variations with the total mass of the star will be discussed in later papers.

Endal, A. S.

1975-01-01

189

Screening revolution : constructing a Marxist theoretical framework for class="hilite">social documentary filmmakers analysing class structure and the class struggle.  

E-print Network

??class="hilite">class="hilite">Social documentary filmmaking cannot be undertaken in a theoretical void, regardless of the intentions of the filmmaker. Each film's textual, stylistic and aesthetic composition is… (more)

Sparkes, Daryl John Trevor

2006-01-01

190

Towards a Theoretical Framework of Determinants for the Adoption and Diffusion of Buyer Authenticated Credit Card Payment Programs: The Online Merchant's Perspective  

Microsoft Academic Search

This study employs Rogers' framework of perceived innovation attributes augmented by environmental influences and marketing initiatives and a new factor developed for this study, namely, risk mitigation measures, to examine the case of merchant adoption of buyer authenticated credit card payment programs (BACCPPs). Recently introduced by the major credit card associations as replacements for the decommissioned SET and 3DSET protocols,

Mustafa A. Ally; Mark Toleman

2004-01-01

191

Theoretical Explanation for Success of Deep-Level-Learning Study Tours  

ERIC Educational Resources Information Center

Study tours can help internationalize curricula and prepare students for global workplaces. We examine benefits of tours providing deep-level learning experiences rather than industrial tourism using five main theoretical frameworks to highlight the diverse learning benefits associated with intensive study tours in particular. Relevant theoretical

Bergsteiner, Harald; Avery, Gayle C.

2008-01-01

192

Gabora, L. & Aerts, D. (2007). A cross-disciplinary framework for the description of contextually mediated change. Electronic Journal of Theoretical Physics, 4(15), 1-22.  

E-print Network

of contextually mediated change. Electronic Journal of Theoretical Physics, 4(15), 1-22. A Cross Department of Psychology University of British Columbia Okanagan Campus, 3333 University Way Kelowna BC, V1V, nondeterminism, unifying theory #12;3 1. Introduction This paper elaborates a general theory of change of state

Aerts, Diederik

193

Comment on "A theoretical framework for quantitatively characterizing sound field diffusion based on scattering coefficient and absorption coefficient of walls" [J. Acoust. Soc. Am. 128, 1140-1148 (2010)] (L).  

PubMed

The relationship between the acoustic scattering characteristics of materials and the degree of diffusion in enclosed acoustic spaces has recently attracted considerable research attention. Hanyu [J. Acoust. Soc. Am. 128(3), 1140-1148 (2010)] introduced a theoretical framework, in which the diffusion time in an enclosure is expressed as a function of a material's average scattering coefficient. In this letter, a modification of this theory is proposed. The decay process of the sound energy through scattering is divided into discrete sub-processes, specifically, a purely scattering process, and alternating scattering and specular reflections. The behavior of each process is examined for different scattering coefficients. PMID:23297877

Omoto, Akira

2013-01-01

194

Theoretical Modeling of Spin Crossover in Metal-Organic Frameworks: [Fe(pz)2Pt(CN)4] as a Case Study.  

PubMed

Metal-organic frameworks (MOFs) with spin-crossover behavior are promising materials for applications in memory storage and sensing devices. A key parameter that characterizes these materials is the transition temperature T1/2, defined as the temperature with equal populations of low-spin and high-spin species. In this study, we describe the development, implementation, and application of a novel hybrid Monte Carlo/molecular dynamics method that builds upon the Ligand Field Molecular Mechanics approach and enables the modeling of spin-crossover properties in bulk materials. The new methodology is applied to the study of a spin-crossover MOF with molecular formula [Fe(pz)2Pt(CN)4] (pz = pyrazine). The total magnetic moment of the material is determined as a function of the temperature from direct calculations of the relative equilibrium populations of both low-spin and high-spin states of each Fe(II) center of the framework. The T1/2 value, calculated from the temperature dependence of the magnetization curve, is in good agreement with the available experimental data. A comparison between the spin-crossover behavior of the isolated secondary building block of the framework and the bulk material is presented, which reveals the origin of the different spin-crossover properties of the isolated molecular system and corresponding MOF structure. PMID:25271873

Cirera, Jordi; Babin, Volodymyr; Paesani, Francesco

2014-10-20

195

MAINE AQUIFERS  

EPA Science Inventory

AQFRS24 contains polygons of significant aquifers in Maine (glacial deposits that are a significant ground water resource) mapped at a scale 1:24,000. This statewide coverage was derived from aquifer boundaries delineated and digitized by the Maine Geological Survey from data com...

196

Details for Manuscript Number SSM-D-07-01631R1 "HIV-Related Stigma: Adapting a Theoretical Framework for Use in India"  

PubMed Central

Stigma complicates the treatment of HIV worldwide. We examined whether a multi-component framework, initially consisting of enacted, felt normative, and internalized forms of individual stigma experiences, could be used to understand HIV-related stigma in Southern India. In Study 1, qualitative interviews with a convenience sample of 16 people living with HIV revealed instances of all three types of stigma. Experiences of discrimination (enacted stigma) were reported relatively infrequently. Rather, perceptions of high levels of stigma (felt normative stigma) motivated people to avoid disclosing their HIV status. These perceptions often were shaped by stories of discrimination against others HIV-infected individuals, which we adapted as an additional component of our framework (vicarious stigma). Participants also varied in their acceptance of HIV stigma as legitimate (internalized stigma). In Study 2, newly-developed measures of the stigma components were administered in a survey to 229 people living with HIV. Findings suggested that enacted and vicarious stigma influenced felt normative stigma; that enacted, felt normative, and internalized stigma were associated with higher levels of depression; and that the associations of depression with felt normative and internalized forms of stigma were mediated by the use of coping strategies designed to avoid disclosure of one's HIV serostatus. PMID:18599171

Herek, Gregory M; Ramakrishna, Jayashree; Bharat, Shalini; Chandy, Sara; Wrubel, Judith; Ekstrand, Maria L

2008-01-01

197

Prediction of the main macrocyclic conjugation pathway for porphyrinoids from the ring current distribution.  

PubMed

For some porphyrinoids, such as orangarin and amethyrin, the main route of macrocyclic pi-circulation is different from the main macrocyclic conjugation pathway predicted by porphyrin chemists. Our analytical theory of ring-current diamagnetism allows us to predict the main macrocyclic conjugation pathway from the ring current distribution. We can now interpret macrocyclic aromaticity and macrocyclic circulation consistently within the same theoretical framework. PMID:20024157

Aihara, Jun-Ichi; Makino, Masakazu

2010-01-01

198

MAINE WOODLOTS  

EPA Science Inventory

MEOWN250 describes industrial, non-industrial, and public woodlot ownership in Maine at 1:250,000 scale. Industrial owners are those having at least one primary wood processing facility. Non-industrial owners are those with no primary wood processing facility. Public ownership...

199

A theoretical framework to distinguish direct and indirect anthropogenic perturbations of the terrestrial carbon cycle; and its implications in the definition of "emissions from land-use change"  

NASA Astrophysics Data System (ADS)

We present a theoretical analysis of the net land-to-atmosphere CO2 flux, so as to discuss possible definitions of "emissions from land-use change" at global scale. Our work is based on the fact that the terrestrial carbon cycle is affected by two anthropogenic perturbations. The first is the perturbation of the global Carbon-Climate-Nitrogen (CCN) system as observed with elevated CO2, climate change and increased nitrogen deposition; it impacts the intensive parameters of the terrestrial biosphere. The second is the Land-Use and Land-Use Change (LUC) perturbation induced by human activities; impacting the extensive parameters of the biosphere. Previous global carbon budgets tried to separate these two perturbations by defining two CO2 fluxes: the emissions from land-use change (LUC perturbation) and the land sink (CCN perturbation). Here, through successive mathematical demonstrations, we isolate four (not two) generic components of the net land-to-atmosphere CO2 flux. The two first components are the fluxes that would be observed if only one perturbation occurred. The two other components are due to the coupling of the CCN and LUC perturbations, highlighting the non-linear behavior of the terrestrial carbon cycle. Thanks to this, we introduce three possible definitions of "emissions from land-use change", that are indeed used in the scientific literature (often without clear distinctions), and we draw conclusions as for their absolute and relative behaviors. Finally, we illustrate our theoretical results thanks to two models: a simple carbon-climate model using a book-keeping module to estimate emissions from land-use change (named OSCAR), and the spatialized land-surface model ORCHIDEE. Our preliminary results show that comparing results from studies that do not use the same definition can lead to a bias of up to 20% between estimates of "emissions from land-use change". This makes our study of major interest to reconcile modeling and observation of "emissions from land-use change", and ultimately to distinguish direct and indirect effects of anthropogenic activities.

Gasser, Thomas; Ciais, Philippe; Viovy, Nicolas

2013-04-01

200

Tracking feature extraction based on manifold learning framework  

Microsoft Academic Search

Manifold learning is a fast growing area of research recently. The main purpose of manifold learning is to search for intrinsic variables underlying high-dimensional inputs which lie on or are close to a low-dimensional manifold. Different from current theoretical works and applications of manifold learning approaches, in our work manifold learning framework is transferred to tracking feature extraction for the

Hong Qiao; Peng Zhang; Bo Zhang; Suiwu Zheng

2011-01-01

201

[Marketing in veterinary practice; a theoretical framework].  

PubMed

An increase in the number of veterinarians, while at the same time the number of animals has remained constant, has resulted in growing competition. By extending the range of products and by enlarging the veterinarians' scope of activities this competition can be decreased. A marketing-orientation will be helpful in this respect. This article indicates in which way marketing concepts can be used in a veterinary practice. The services of the veterinarian will be looked at by means of the Abell approach. This focuses on the functions performed by the services and examines, per function performed, for whom this might be interesting and which alternatives there might be. Next the concept of market segmentation is filled in for a veterinary practice by means of a hypothetical example. The marketing mix (product, place, price, promotion and personnel) is given considerable attention. The last element of marketing in a veterinary practice that is discussed here is the marketing information system. In a next article the question will be answered how marketing-directed the Dutch veterinarian works nowadays. To find this out research has been done; 166 vets were interviewed by telephone for approximately 40 minutes each. PMID:2321238

Schuurmans, A J; Smidts, A

1990-03-15

202

Learning Physical Domains: Toward a Theoretical Framework  

E-print Network

. The chapter outlines the component theories and proposes a learning sequence for physical domains. 12 research. No one of these is adequate by itself. When extrapolating from adult learning research, we must keep in mind that cases of pure experiential learning are rare in adult life; some sort of instruction

Forbus, Kenneth D.

203

Theoretical Frameworks to Guide School Improvement  

ERIC Educational Resources Information Center

A firm grounding in change theory can provide educational leaders with an opportunity to orchestrate meaningful organizational improvements. This article provides an opportunity for practicing leaders to review four major theories of organizational change--continuous improvement, two approaches to organizational learning, and appreciative inquiry.…

Evans, Lisa; Thornton, Bill; Usinger, Janet

2012-01-01

204

Interpersonal Relations: A Choice-Theoretic Framework.  

ERIC Educational Resources Information Center

The microeconomic theory relating to utility and cost is applied to the "risk," and the possible "payoff" relative to relationships with others. A good measure of utility is the need or want-satisfying power of an alternative. For the analysis of interpersonal relationships, the needs delineated by Maslow (i.e. food, shelter, belongingness, love,…

Couvillion, L. Michael; Eckstein, Daniel G.

205

Kinetic chain rehabilitation: a theoretical framework.  

PubMed

Sequenced physiologic muscle activations in the upper and lower extremity result in an integrated biomechanical task. This sequencing is known as the kinetic chain, and, in upper extremity dominant tasks, the energy development and output follows a proximal to distal sequencing. Impairment of one or more kinetic chain links can create dysfunctional biomechanical output leading to pain and/or injury. When deficits exist in the preceding links, they can negatively affect the shoulder. Rehabilitation of shoulder injuries should involve evaluation for and restoration of all kinetic chain deficits that may hinder kinetic chain function. Rehabilitation programs focused on eliminating kinetic chain deficits, and soreness should follow a proximal to distal rationale where lower extremity impairments are addressed in addition to the upper extremity impairments. A logical progression focusing on flexibility, strength, proprioception, and endurance with kinetic chain influence is recommended. PMID:22666599

Sciascia, Aaron; Cromwell, Robin

2012-01-01

206

Framework for Supporting Web-Based Collaborative Applications  

NASA Astrophysics Data System (ADS)

The article proposes an intelligent framework for supporting Web-based applications. The framework focuses on innovative use of existing resources and technologies in the form of services and takes the leverage of theoretical foundation of services science and the research from services computing. The main focus of the framework is to deliver benefits to users with various roles such as service requesters, service providers, and business owners to maximize their productivity when engaging with each other via the Web. The article opens up with research motivations and questions, analyses the existing state of research in the field, and describes the approach in implementing the proposed framework. Finally, an e-health application is discussed to evaluate the effectiveness of the framework where participants such as general practitioners (GPs), patients, and health-care workers collaborate via the Web.

Dai, Wei

207

On the Grammar and Model-Theoretic Semantics of Children's Noun Phrases.  

ERIC Educational Resources Information Center

The paper shows informally how model-theoretical semantics may be used by a computer to give a straight-forward analysis of the meaning of children's language. This approach to semantics grows out of the main thrust of work in mathematical logic. It is discussed in the framework of generative grammar and is based on the application of the…

Suppes, Patrick

208

Anesthesiologists' and surgeons' perceptions about routine pre-operative testing in low-risk patients: application of the Theoretical Domains Framework (TDF) to identify factors that influence physicians' decisions to order pre-operative tests  

PubMed Central

Background Routine pre-operative tests for anesthesia management are often ordered by both anesthesiologists and surgeons for healthy patients undergoing low-risk surgery. The Theoretical Domains Framework (TDF) was developed to investigate determinants of behaviour and identify potential behaviour change interventions. In this study, the TDF is used to explore anaesthesiologists’ and surgeons’ perceptions of ordering routine tests for healthy patients undergoing low-risk surgery. Methods Sixteen clinicians (eleven anesthesiologists and five surgeons) throughout Ontario were recruited. An interview guide based on the TDF was developed to identify beliefs about pre-operative testing practices. Content analysis of physicians’ statements into the relevant theoretical domains was performed. Specific beliefs were identified by grouping similar utterances of the interview participants. Relevant domains were identified by noting the frequencies of the beliefs reported, presence of conflicting beliefs, and perceived influence on the performance of the behaviour under investigation. Results Seven of the twelve domains were identified as likely relevant to changing clinicians’ behaviour about pre-operative test ordering for anesthesia management. Key beliefs were identified within these domains including: conflicting comments about who was responsible for the test-ordering (Social/professional role and identity); inability to cancel tests ordered by fellow physicians (Beliefs about capabilities and social influences); and the problem with tests being completed before the anesthesiologists see the patient (Beliefs about capabilities and Environmental context and resources). Often, tests were ordered by an anesthesiologist based on who may be the attending anesthesiologist on the day of surgery while surgeons ordered tests they thought anesthesiologists may need (Social influences). There were also conflicting comments about the potential consequences associated with reducing testing, from negative (delay or cancel patients’ surgeries), to indifference (little or no change in patient outcomes), to positive (save money, avoid unnecessary investigations) (Beliefs about consequences). Further, while most agreed that they are motivated to reduce ordering unnecessary tests (Motivation and goals), there was still a report of a gap between their motivation and practice (Behavioural regulation). Conclusion We identified key factors that anesthesiologists and surgeons believe influence whether they order pre-operative tests routinely for anesthesia management for a healthy adults undergoing low-risk surgery. These beliefs identify potential individual, team, and organisation targets for behaviour change interventions to reduce unnecessary routine test ordering. PMID:22682612

2012-01-01

209

Towards theoretical emancipation in Educational ICT studies  

Microsoft Academic Search

This article explores how theoretical frameworks are evident in Master's dissertations and doctoral theses in Educational ICT research. These studies (n = 103) were purposively selected from seven South African universities. We argue that theoretical frameworks are epistemological devices that account for the knowledge that is produced in a study. We furthermore argue that they explicitly fimplicitly account for the

Najma Agherdien; Elizabeth Henning; Duan van der Westhuizen

2007-01-01

210

Theoretical highquality  

E-print Network

A Guide for New Referees in Theoretical Computer Science \\Lambda Ian Parberry y Department of Computer Sciences University of North Texas Your success as a scientist will in part be measured is an attempt to distill the experience of the theoretical computer science com­ munity on the subject

Kobourov, Stephen G.

211

MAIN THEOREM OF COMPLEX MULTIPLICATION  

Microsoft Academic Search

In [S, Ch. IV, ?18] the Main Theorem of complex multiplication is proved in a manner that uses some adelic formalism. However, [S] uses a framework for algebraic geometry that has long been abandoned, so many of the beautiful ideas there are somewhat shrouded in mystery for the reader who is unfamiliar with the pre-Grothendieck approaches to algebraic geometry and

BRIAN CONRAD

212

A Framework for Interactive Proof  

Microsoft Academic Search

This paper introduces Proof General Kit, a framework for software components tailored to interactive proof development. The goal of the framework is to enable flexible environments for managing formal proofs across their life-cycle: creation, maintenance and exploitation. The framework connects together dierent kinds of component, exchanging messages using a common communication infrastructure and protocol called PGIP. The main channel connects

David Aspinall; Christoph Lüth; Daniel Winterstein

2007-01-01

213

Reminiscence: A Continuity Theory Framework.  

ERIC Educational Resources Information Center

Provides theoretical underpinnings for reminiscence by reviewing and evaluating previous research, and integrating it within a theoretical framework. Using continuity theory perspective, generates propositions that may facilitate reminiscence research across the life span. Three global functions of reminiscence are derived--private, social, and…

Parker, Rhonda G.

1995-01-01

214

22 Digital Technology For Conviviality TheoreticalTheoreticalTheoreticalTheoretical  

E-print Network

a huge portion of their time are spent either working for a car or in the car itself. #12;2 ­ Theoretical causes people to spend more and more time driving. An average driver spends anywhere between two to eight favorable at first. But over time they will quickly pass a critical point that will begin to create

215

Learning in the framework of fuzzy lattices  

Microsoft Academic Search

A basis for rigorous versatile learning is introduced theoretically, that is the framework of fuzzy lattices or FL-framework for short, which proposes a synergetic combination of fuzzy set theory and lattice theory. A fuzzy lattice emanates from a conventional mathematical lattice by fuzzifying the inclusion order relation. Learning in the FL-framework can be effected by handling families of intervals, where

Vassilios Petridis; Vassilis G. Kaburlasos

1999-01-01

216

Theoretical spectra of terrestrial exoplanet surfaces  

E-print Network

We investigate spectra of airless rocky exoplanets with a theoretical framework that self-consistently treats reflection and thermal emission. We find that a silicate surface on an exoplanet is spectroscopically detectable ...

Hu, Renyu

217

Intelligent agent based framework for manufacturing systems control  

Microsoft Academic Search

Existing modeling frameworks for manufacturing system control can be classified into hierarchical, heterarchical, and hybrid control frameworks. The main drawbacks of existing frameworks are discussed in this paper. A new hybrid modeling framework is also described. It is a hybrid of the two: hierarchical and heterarchical frameworks. In this proposed framework, entities (e.g., parts) and resources (e.g., material handling devices,

Sunderesh S. Heragu; Robert J. Graves; Byung-in Kim; Art St. Onge

2002-01-01

218

Theoretical models in the Virtual Observatory  

E-print Network

Although full interoperativity between theoretical and observational data in the framework of the Virtual Observatory would be a very desirable achievement, the current status of VO offers few approaches to handle theoretical models. TSAP (Theoretical Spectra Access Protocol) has been proposed as a tool to fill this void, providing a simple scheme to easily operate with th is kind of data. TSAP is useful not only for synthetic spectra but also for other types of theoretical data. As an example we show an Isochrone and Evolutionary Tracks server using TSAP. Finally, we pay special attention to the correct treatment of the credits an important issue in the field of theoretical models.

Carlos Rodrigo; Raul Gutierrez; Enrique Solano; Miguel Cervino

2007-11-16

219

Fixed Informal Informal mainly UML Graphical Modeling Framework (GMF) Notation  

E-print Network

? Graphical modeling languages are defined with their: ?Abstract syntax: formally using MOF ?Concrete graphical syntax: informally using text and (example) figures ? Formal diagram definition is needed ?Enables interchange of modeling diagrams among tools ?Enables consistent rendering of diagrams by tools ?Enables consistent interpretation of diagrams by users

Maged Elaasar; M Spec

2012-01-01

220

A framework for community design : Worcester's Main South neighborhood  

E-print Network

Communities and the connections between them act as the foundation for the fabric of great cities. Suburbs were originally intended as a utopian alternative to crowded urban conditions. However, the current model of ...

DeSollar, Samuel Joseph

1997-01-01

221

Main University Entrance Main University Reception  

E-print Network

Economics Research Group School of Arts (taught programmes) Marie Jahoda School of Social Sciences (UG, PG Athletics Centre Eastern Gateway Main Reception Beldam Gallery Brunel Business School Lancaster Suite Conference Office Mary Seacole Health and Social Care (enquiries) Sports Centre St Johns Information Systems

Martin, Ralph R.

222

ICT Framework  

NSDL National Science Digital Library

This page, from the Mid-Pacific Information and Communications Technology Center, provides a basic background of Information and Communications Technology (ICT). The page outlines the basic framework for understanding and learning about the technology. Information on related industries, levels of ICT expertise and information about non-ICT industries is all included in the document.

2011-08-01

223

Wildlife Habitat of Maine  

Microsoft Academic Search

The Wildlife Habitat of Maine map was created using data from the Maine Office of GIS and the United States National Atlas. The map shows the land cover characteristics of Maine, including human development and major roads. The most suitable wildlife habitat can be attributed to the areas with the most suitable land cover and the least human development. An

Wendy Sicard

2005-01-01

224

Toward an Interdisciplinary Framework for Educational Inclusivity  

ERIC Educational Resources Information Center

This purpose of this paper is to provide a theoretical foundation for inclusion in Canadian schools for this Special Issue on Inclusive Education. In response to the need for an interdisciplinary framework, this paper uses an interpretive literature review methodology to construct a framework for educational inclusivity based on four disciplinary…

DeLuca, Christopher

2013-01-01

225

Sulawesi: A Wearable Application Integration Framework  

Microsoft Academic Search

This paper describes Sulawesi, a framework for developing applications for wearable computing that are capable of multi-modal interaction with the user. The design principles of the framework are described along with its main features, and some example applications that exploit the capabilities of the framework are outlined

Neill J. Newman; Adrian F. Clark

1999-01-01

226

MAINE MARINE WORM HABITAT  

EPA Science Inventory

WORM provides a generalized representation at 1:24,000 scale of commercially harvested marine worm habitat in Maine, based on Maine Department of Marine Resources data from 1970's. Original maps were created by MDMR and published by USF&WS as part of the ""&quo...

227

Exploring Main Belt Asteroids  

Microsoft Academic Search

Terrestrial planet formation in the main asteroid belt was interrupted when growing protoplanets became sufficiently massive to gravitationally perturb the local population, causing bodies to collide with increased energy, thus ending accretion and commencing fragmentation and disruption. Few of these protoplanets are thought to have survived unshattered (e.g., Ceres, Vesta, Pallas), leaving a main belt population dominated by fragments of

M. V. Sykes; S. M. Larson; R. Whiteley; U. Fink; R. Jedicke; J. Emery; R. Fevig; M. Kelley; A. W. Harris; S. Ostro; K. Reed; R. P. Binzel; A. Rivkin; C. Magri; W. Bottke; D. Durda; R. Walker; D. Davis; W. K. Hartmann; D. Sears; H. Yano; J. Granahan; A. Storrs; S. J. Bus; J. F. Bell; D. Tholen; A. Cellino

2001-01-01

228

The Maine Music Box  

NSDL National Science Digital Library

Created through a collaboration between the University of Maine's Fogler Library and other Maine libraries, The Maine Music Box contains hundreds of digitized sheet music scores from five major collections. First-time visitors to the site will want to click on the "About Maine Music Box" project as a way of getting started. Here they can check out the "User Information" area, which contains helpful tips on viewing the music and how to best browse the entire database. Additionally, those with a penchant for technical details and information science in general can also learn in copious detail how the database was created for this project. From there, visitors can move straight away into the main collection. Visitors can browse the collection by music subject, sheet music cover art, or just type in their own keywords. One of the best ways to look over the collection is to browse around in such areas as "Instructional Violin", "Maine Collection" and "Parlor Salon Collection". It's also worth remarking that this site may inspire a sing-a-long, a campfire get-together, or a miniature Chautauqua.

229

Disseminating research findings: what should researchers do? A systematic scoping review of conceptual frameworks  

PubMed Central

Background Addressing deficiencies in the dissemination and transfer of research-based knowledge into routine clinical practice is high on the policy agenda both in the UK and internationally. However, there is lack of clarity between funding agencies as to what represents dissemination. Moreover, the expectations and guidance provided to researchers vary from one agency to another. Against this background, we performed a systematic scoping to identify and describe any conceptual/organising frameworks that could be used by researchers to guide their dissemination activity. Methods We searched twelve electronic databases (including MEDLINE, EMBASE, CINAHL, and PsycINFO), the reference lists of included studies and of individual funding agency websites to identify potential studies for inclusion. To be included, papers had to present an explicit framework or plan either designed for use by researchers or that could be used to guide dissemination activity. Papers which mentioned dissemination (but did not provide any detail) in the context of a wider knowledge translation framework, were excluded. References were screened independently by at least two reviewers; disagreements were resolved by discussion. For each included paper, the source, the date of publication, a description of the main elements of the framework, and whether there was any implicit/explicit reference to theory were extracted. A narrative synthesis was undertaken. Results Thirty-three frameworks met our inclusion criteria, 20 of which were designed to be used by researchers to guide their dissemination activities. Twenty-eight included frameworks were underpinned at least in part by one or more of three different theoretical approaches, namely persuasive communication, diffusion of innovations theory, and social marketing. Conclusions There are currently a number of theoretically-informed frameworks available to researchers that can be used to help guide their dissemination planning and activity. Given the current emphasis on enhancing the uptake of knowledge about the effects of interventions into routine practice, funders could consider encouraging researchers to adopt a theoretically-informed approach to their research dissemination. PMID:21092164

2010-01-01

230

The main cubioid  

NASA Astrophysics Data System (ADS)

The connectedness locus in the parameter space of quadratic polynomials is called the Mandelbrot set. A good combinatorial model of this set is due to Thurston. By definition, the principal hyperbolic domain of the Mandelbrot set consists of parameter values, for which the corresponding quadratic polynomials have an attracting fixed point. The closure of the principal hyperbolic domain of the Mandelbrot set is called the main cardioid. Its topology is completely described by Thurston's model. Less is known about the connectedness locus in the parameter space of cubic polynomials. In this paper, we discuss cubic analogues of the main cardioid and establish relationships between them.

Blokh, Alexander; Oversteegen, Lex; Ptacek, Ross; Timorin, Vladlen

2014-08-01

231

MAINE SCHOOLS AND LIBRARIES  

EPA Science Inventory

SCHLIB shows point locations of libraries and educational institutions in Maine at 1:24,000 scale. Colleges, universities, technical colleges, high schools, middle schools, elementary schools, kindergarten/sub-primary and other special schools are included. The data was developed...

232

Maine Dance Curriculum Guide.  

ERIC Educational Resources Information Center

This curriculum guide is designed to support those in Maine who wish to establish or enhance dance education in any educational areas and at elementary or secondary levels. A preface describes the state's dance heritage. An introduction argues for the importance of dance education. The next section addresses pedagogy and explains how to create and…

Grindel, Susan; And Others

233

COLDSPRINGCREEK MAIN STREET WEST  

E-print Network

.................................... 43 David Braley Athletic Centre.... 54 Divinity College............................ 17 Dramatic Arts MAIN STREET WEST COLLEGE CRESCENT COOTESDRIVE WESTAWAY ROAD SCHOLAR'S ROAD STEARN DRIVE Entrance Pay Stations Short Term Parking - Pay and Display Campus Shuttle Bus Service Go Bus Stop A-Q CAMPUS

Thompson, Michael

234

COLDSPRINGCREEK MAIN STREET WEST  

E-print Network

....................................43 David Braley Athletic Centre ....54 Divinity College............................17 Dramatic Arts 37 MAIN STREET WEST COLLEGE CRESCENT COOTESDRIVE WESTAWAY ROAD SCHOLAR'S ROAD STEARN DRIVE EntranceCampus LEGEND McMaster University Entrance Security and Parking Services Parking Lot Location Pay Stations Short

Haykin, Simon

235

Main Course Beef Lasagne  

E-print Network

with lemon and free range egg mayonnaise Mediterranean Quorn and Garlic Pie A ragu of roasted Mediterranean vegetables and Quorn topped with garlic bread slices Served with Sautéed New Potatoes or Penne Pasta Sweet Corn & Garlic Bread Salad Bar Should you wish to have salad as your main meal please see the choice

Bristol, University of

236

Maine Humanities Council  

NSDL National Science Digital Library

Formed as a private nonprofit organization, the Maine Humanities Council (MHC) "promotes strong communities and informed citizens by providing Mainers with opportunities to explore the power and pleasure of ideas." Their work is supported by volunteer board members, and their projects include programs to promote reading and writing, guest lectures around the state, and online newsletters and discussion groups. In the "Programs" area, visitors can learn about these programs, and educators can check out the resources created especially for them. The "Connections" area contains links to their thoughtful blog, their "Humanities on Demand" podcasts, and their periodic newsletter "Synapse", which deals with medicine and literature. The podcasts are quite fun, and they include "Franco-American Women's Words in Maine" and a talk by Professor Dianne Sadoff of Rutgers University on Middlemarch, by George Eliot.

237

Stars main sequence  

NSDL National Science Digital Library

What happens during most of a star's life? This activity page, part of an interactive laboratory series for grades 8-12, introduces students to the main sequence phase of a star's existence. This phase is where a star lives out the majority of its life. In an interactive lab activity, students predict the length of the main sequence for four different stars. The predictions can be printed for later evaluation. Students view diagrams that compare the size and color of stars to human lives, and equilibrium within a star is stressed. Finally, students choose between two hypotheses about the length of life of a star. Students write a one- to three-sentence explanation for their hypotheses. The correct answer is provided. Copyright 2005 Eisenhower National Clearinghouse

University of Utah. Astrophysics Science Project Integrating Research and Education (ASPIRE)

2003-01-01

238

Game-theoretic characterization of antidegradable channels  

NASA Astrophysics Data System (ADS)

We introduce a guessing game involving a quantum channel, three parties—the sender, the receiver, and an eavesdropper, Eve—and a quantum public side channel. We prove that a necessary and sufficient condition for the quantum channel to be antidegradable, is that Eve wins the game. We thus obtain a complete operational characterization of antidegradable channels in a game-theoretic framework.

Buscemi, Francesco; Datta, Nilanjana; Strelchuk, Sergii

2014-09-01

239

COBRA Main Engine Project  

NASA Technical Reports Server (NTRS)

The COBRA (CO-Optimized Booster for Reusable Applications) project include the following: 1. COBRA main engine project team. 2. COBRA and RLX cycles selected. 3. COBRA proto-type engine approach enables mission success. 4. COBRA provides quick, low cost demo of cycle and technologies. 5. COBRA cycle I risk reduction supports. 6. Achieving engine safety. 6. RLX cycle I risk reduction supports. 7. Flight qualification. 9. Life extension engine testing.

Snoddy, Jim; Sides, Steve; Lyles, Garry M. (Technical Monitor)

2002-01-01

240

Hybrid rocket engine, theoretical model and experiment  

Microsoft Academic Search

The purpose of this paper is to build a theoretical model for the hybrid rocket engine\\/motor and to validate it using experimental results. The work approaches the main problems of the hybrid motor: the scalability, the stability\\/controllability of the operating parameters and the increasing of the solid fuel regression rate. At first, we focus on theoretical models for hybrid rocket

Teodor-Viorel Chelaru; Florin Mingireanu

2011-01-01

241

Augmented Human Engineering: A Theoretical and Experimental  

E-print Network

. Thus, augmented human design has to integrate human factors - anatomy, neurophysiology, behaviour12 Augmented Human Engineering: A Theoretical and Experimental Approach to Human Systems. Introduction This chapter focuses on one of the main issues for augmented human engineering: integrating

Paris-Sud XI, Université de

242

Nonrelativistic Holography — a Group-Theoretical Perspective  

NASA Astrophysics Data System (ADS)

We give a review of some group-theoretical results related to nonrelativistic holography. Our main playgrounds are the Schrödinger equation and the Schrödinger algebra. We first recall the interpretation of nonrelativistic holography as equivalence between representations of the Schrödinger algebra describing bulk fields and boundary fields. One important result is the explicit construction of the boundary-to-bulk operators in the framework of representation theory, and that these operators and the bulk-to-boundary operators are intertwining operators. Further, we recall the fact that there is a hierarchy of equations on the boundary, invariant with respect to Schrödinger algebra. We also review the explicit construction of an analogous hierarchy of invariant equations in the bulk, and that the two hierarchies are equivalent via the bulk-to-boundary intertwining operators. The derivation of these hierarchies uses a mechanism introduced first for semisimple Lie groups and adapted to the nonsemisimple Schrödinger algebra. These require development of the representation theory of the Schrödinger algebra which is reviewed in some detail. We also recall the q-deformation of the Schrödinger algebra. Finally, the realization of the Schrödinger algebra via difference operators is reviewed.

Dobrev, V. K.

2014-02-01

243

A system theoretic approach to design safety into medical device  

E-print Network

The goal of this thesis is to investigate and demonstrate the application of a systems approach to medical device safety in China. Professor Leveson has developed an accident modeling framework called STAMP (Systems Theoretic ...

Song, Qingyang S.M. Massachusetts Institute of Technology

2012-01-01

244

Non-state actors in international politics: a theoretical framework  

E-print Network

for such terrorist attacks on U.S. soil as early as 1995. Both the Federal Bureau of Investigation (FBI) and the Federal Aviation Administration (FAA) had detailed information about the possible use of hijack/suicide attacks by terrorists connected to Osama bin Laden..."(Ahmed 2002). It is even more startling that inquiry has also revealed that the FBI had advance indications of plans to hijack U.S. airliners and use them as weapons, but neither acted on them nor distributed the intelligence to local police agencies (Ahmed...

Paley, Abram Wil

2009-05-15

245

A New Replicator: A theoretical framework for analysing replication  

Microsoft Academic Search

BACKGROUND: Replicators are the crucial entities in evolution. The notion of a replicator, however, is far less exact than the weight of its importance. Without identifying and classifying multiplying entities exactly, their dynamics cannot be determined appropriately. Therefore, it is importance to decide the nature and characteristics of any multiplying entity, in a detailed and formal way. RESULTS: Replication is

István Zachar; Eörs Szathmáry

2010-01-01

246

Understanding supply chain management: critical research and a theoretical framework  

Microsoft Academic Search

Increasing global cooperation, vertical disintegration and a focus on core activities have led to the notion that firms are links in a networked supply chain. This strategic viewpoint has created the challenge of coordinating effectively the entire supply chain, from upstream to downstream activities. While supply chains have existed ever since businesses have been organized to bring products and services

I. J. Chen; A. Paulraj

2004-01-01

247

Post-fire ecological succession: A theoretical modeling framework  

Microsoft Academic Search

Fire is considered as an extreme disturbance in Mediterranean grasslands or shrublands as it often brings about many sudden changes in the vegetation structure, composition, and diversity patterns. In addition, it creates opportunities for exotic plant species to establish successfully in foreign habitat, and to outperform dominating native species. Monitoring and simulating post-fire successional changes, therefore, are essential tasks to

Amit Chakraborty; Bai-Lian Li

2009-01-01

248

Media Competence In Search of a Theoretical Framework  

Microsoft Academic Search

Media competence for long time has been understood as the recipients' ability and capacity of a critical awareness of media. The idea was that people, who understand how media are produced, how media influence and what media do to recipients or what consumers do with media, would then be independent from the media or immune against their influence. That concept

Thomas A. Bauer

249

Understanding Online Knowledge Sharing: An Exploratory Theoretical Framework  

Microsoft Academic Search

\\u000a Online learning has been getting popular in higher education. Key functionalities of online learning environment include the\\u000a access to a wider perspective of learning resources and the provision of social interactions between instructor-learners and\\u000a among learners-learners. Recent empirical findings in online learning have acknowledged the importance of online knowledge\\u000a sharing as an integral part of online learning, through the various

Will Wai-Kit Ma; Allan Hoi Kau Yuen

2010-01-01

250

Assessment of Student Outcomes Using a Theoretical Framework.  

ERIC Educational Resources Information Center

Examines the scientific concept of evaporation. Attempts to show how students develop their understanding through the levels of the Structure of the Observed Learning Outcome (SOLO) taxonomy. Shows how designing learning experiences to suit the learners' developmental stages in understanding a concept is paramount to the overall growth of the…

Levins, Lesley

1997-01-01

251

Virtual Manipulatives in Mathematics Education: A Theoretical Framework  

ERIC Educational Resources Information Center

Meaningful educational activities and cognitive tools might improve students' active involvements in the teaching-learning process and encourage their reflections on the concepts and relations to be investigated. It is claimed that usage of manipulatives not only increase students' conceptual understanding and problem solving skills but also…

Durmus, Soner; Karakirik, Erol

2006-01-01

252

Research Leadership in Writing for Publication: A Theoretical Framework  

ERIC Educational Resources Information Center

Academics experience difficulty in managing competing tasks, particularly in relation to writing for publication. In a study conducted on a writing retreat, analysis of data obtained from academic writers revealed that facilitative leadership provided at a writing retreat was central to managing task complexity and writing-related anxiety. The…

Murray, Rowena; Steckley, Laura; MacLeod, Iain

2012-01-01

253

A theoretical framework for understanding recovered memory experiences.  

PubMed

If recovered memory experiences appear counter-intuitive, this is in part due to misconceptions about trauma and memory, and to a failure to adopt a comprehensive model of memory that distinguishes personal semantic memory, autobiographical event memory, and memory appraisal. Memory performance is generally superior when events, including traumas, are central to identity. Prolonged trauma in childhood, however, can produce severe identity disturbances that may interfere with the encoding and later retrieval of personal semantic and autobiographical event information. High levels of emotion either at encoding or recall can also interfere with the creation of coherent narrative memories. For example, high levels of shock and fear when memories are recovered unexpectedly may lead to the experience of vivid flashbacks. Memory appraisals may also influence the sense that an event has been forgotten for a long time. Recovered memories, although unusual, do not contradict what we know about how memory works. PMID:22303766

Brewin, Chris R

2012-01-01

254

A PATTERN CLASSIFICATION FRAMEWORK FOR THEORETICAL ANALYSIS OF COMPONENT FORENSICS  

E-print Network

reproduction, forensic analysis can help to trace the origin and authenticity of digital data. This bootlegging others newly created. In the bootlegging example, some traces of the projector employed in the theater

Liu, K. J. Ray

255

VIRTUAL MANIPULATIVES IN MATHEMATICS EDUCATION: A THEORETICAL FRAMEWORK  

Microsoft Academic Search

Abstract: Meaningful,educational,activities and cognitive tools might improve,students’ active involvements,in the teaching-learning process and encourage,their reflections on the concepts and relations to be investigated. It isclaimed,that usage ,of manipulatives, not ,only increase ,students’ conceptual ,understanding ,and ,problem solving skills but also promotes ,their positive attitudes towards ,mathematics ,since they supposedly ,provide “concrete experiences” ,that focus attention and ,increase motivation. A concrete

Soner DURMU?; Erol KARAKIRIK

256

Changing Mental Models of the IT Professions: A Theoretical Framework  

ERIC Educational Resources Information Center

It is widely recognized that the current and projected shortage of adequately-educated IT professionals could be greatly reduced if more female and minority students would major in IT disciplines, yet the dramatic under-representation of these populations appears to be worsening. This under-representation is reflected in Drexel University's…

Agosto, Denise E.; Gasson, Susan; Atwood, Michael

2008-01-01

257

An Information-Theoretic Framework for Flow Visualization  

Microsoft Academic Search

The process of visualization can be seen as a visual communication channel where the input to the channel is the raw data, and the output is the result of a visualization algorithm. From this point of view, we can evaluate the effectiveness of visualization by measuring how much information in the original data is being communicated through the visual communication

Lijie Xu; Teng-Yok Lee; Han-Wei Shen

2010-01-01

258

Situated Learning as a Theoretical Framework for Sport Education  

Microsoft Academic Search

The article seeks to establish the usefulness of situated learning theory as a means of thinking differently about the alleged abstraction of school learning in a range of subjects including physical education, and the issue of transfer of learning. Following a discussion of Lave and Wenger’s notion of situated learning as legitimate peripheral participation in communities of practice, the article

David Kirk; Gary Kinchin

2003-01-01

259

Connecting Online Behavior to Adolescent Development: A Theoretical Framework  

Microsoft Academic Search

\\u000a Adolescence is a period of tremendous change and many view it as a period of “storm and stress.” Although we now know that\\u000a adolescence is not always a turbulent period, the storm and stress view, has come to frame questions about the role of interactive\\u000a technologies in adolescent development, the focus of this book. In this chapter, we present the

Kaveri Subrahmanyam; David Šmahel

260

Theoretical framework for filtered back projection in tomosynthesis  

Microsoft Academic Search

Tomosynthesis provides only incomplete 3D-data of the imaged object. Therefore it is important for reconstruction tasks to take all available information carefully into account. We are focusing on geometrical aspects of the scan process which can be incorporated into reconstruction algorithms by filtered backprojection methods. Our goal is a systematic approach to filter design. A unified theory of tomosynthesis is

Guenter Lauritsch; Wolfgang H. Haerer

1998-01-01

261

Integrated Information in Discrete Dynamical Systems: Motivation and Theoretical Framework  

PubMed Central

This paper introduces a time- and state-dependent measure of integrated information, ?, which captures the repertoire of causal states available to a system as a whole. Specifically, ? quantifies how much information is generated (uncertainty is reduced) when a system enters a particular state through causal interactions among its elements, above and beyond the information generated independently by its parts. Such mathematical characterization is motivated by the observation that integrated information captures two key phenomenological properties of consciousness: (i) there is a large repertoire of conscious experiences so that, when one particular experience occurs, it generates a large amount of information by ruling out all the others; and (ii) this information is integrated, in that each experience appears as a whole that cannot be decomposed into independent parts. This paper extends previous work on stationary systems and applies integrated information to discrete networks as a function of their dynamics and causal architecture. An analysis of basic examples indicates the following: (i) ? varies depending on the state entered by a network, being higher if active and inactive elements are balanced and lower if the network is inactive or hyperactive. (ii) ? varies for systems with identical or similar surface dynamics depending on the underlying causal architecture, being low for systems that merely copy or replay activity states. (iii) ? varies as a function of network architecture. High ? values can be obtained by architectures that conjoin functional specialization with functional integration. Strictly modular and homogeneous systems cannot generate high ? because the former lack integration, whereas the latter lack information. Feedforward and lattice architectures are capable of generating high ? but are inefficient. (iv) In Hopfield networks, ? is low for attractor states and neutral states, but increases if the networks are optimized to achieve tension between local and global interactions. These basic examples appear to match well against neurobiological evidence concerning the neural substrates of consciousness. More generally, ? appears to be a useful metric to characterize the capacity of any physical system to integrate information. PMID:18551165

Balduzzi, David; Tononi, Giulio

2008-01-01

262

Systems Plan for Combating Identity Theft - A Theoretical Framework  

Microsoft Academic Search

The incidences of identity theft have increased substantially in the Internet age. Increasing news reports of bank\\/credit cards theft, assumed identity for economical and criminal activities has created a growing concern for individuals, businesses, and governments. As a result, it's become an important and urgent task for organizations to find managerial and technical solutions to combat identity fraud and theft.

Shaobo Ji; Jianquan Wang; Qingfei Min; Shawn Smith-Chao

2007-01-01

263

Emerging theoretical basis for monitoring the changing states (health) of large marine ecosystems. Technical memo  

SciTech Connect

;Contents: Workshop Objective; Overview and Background; North Sea Ecosystem Case Study; Great Lakes Basin Ecosystem Case Study; Theoretical Framework; Plankton Recorder Technology; Data Analyses; Summary.

Sherman, K.

1993-09-01

264

Rethinking Theoretical Approaches to Stigma  

PubMed Central

A resurgence of research and policy efforts on stigma both facilitates and forces a reconsideration of the levels and types of factors that shape reactions to persons with conditions that engender prejudice and discrimination. Focusing on the case of mental illness but drawing from theories and studies of stigma across the social sciences, we propose a framework that brings together theoretical insights from micro, meso and macro level research: Framework Integrating Normative Influences on Stigma (FINIS) starts with Goffman’s notion that understanding stigma requires a language of social relationships, but acknowledges that individuals do not come to social interaction devoid of affect and motivation. Further, all social interactions take place in a context in which organizations, media and larger cultures structure normative expectations which create the possibility of marking “difference”. Labelling theory, social network theory, the limited capacity model of media influence, the social psychology of prejudice and discrimination, and theories of the welfare state all contribute to an understanding of the complex web of expectations shaping stigma. FINIS offers the potential to build a broad-based scientific foundation based on understanding the effects of stigma on the lives of persons with mental illness, the resources devoted to the organizations and families who care for them, and policies and programs designed to combat stigma. We end by discussing the clear implications this framework holds for stigma reduction, even in the face of conflicting results. PMID:18436358

Martin, Jack K; Lang, Annie; Olafsdottir, Sigrun

2008-01-01

265

Conceptual Framework for Animal Assisted Therapy  

Microsoft Academic Search

Animal-assisted Therapy (A-AT) is becoming a popular therapeutic treatment for both children and adults. The author has used\\u000a A-AT in a school setting with students with emotional disturbances. A review of the literature regarding A-AT reveals a lack\\u000a of a unified theoretical framework. This paper proposes a conceptual framework that incorporates a physiological, psychological,\\u000a and cognitive model to depict the

Tracy S. Geist

2011-01-01

266

The Process of Job Redesign: Signposts from a Theoretical Orphanage?  

Microsoft Academic Search

This paper argues that conceptual frameworks of the process of job redesign are needed, for both practical and theoretical purposes. In particular, they would enable change agents to systematically document and analyze their experiences, as well as encourage the generation of theory-based propositions about the change process. A tentative framework is presented in an attempt to satisfy three principal criteria.

Chris W. Clegg

1979-01-01

267

Main Factors of Teachers' Professional Well-Being  

ERIC Educational Resources Information Center

The purpose of the study was to reveal the main factors of teachers' professional well being. Theoretically constructed model was tested on large scale data belong to 72.190 teachers working at lower secondary level. Theoretical model included teachers' individual, professional and organizational characteristics. Professional well-being…

Yildirim, Kamil

2014-01-01

268

Development of integrated rotorcraft design and virtual manufacturing framework  

Microsoft Academic Search

Purpose – The purpose of this paper is to develop an integrated rotorcraft design and virtual manufacturing framework. The framework consists of two major sub-frameworks which are e-design and virtual manufacturing frameworks. This paper aims to describe the process of generating a specific framework for helicopter design and manufacturing in general, and a method for main rotor blade design. Design\\/methodology\\/approach

Ngoc Anh Vu; Abdulaziz Azamatov; Tun Lwin; Jae-Woo Lee

2011-01-01

269

Theoretical Grounding: The "Missing Link" in Suicide Research.  

ERIC Educational Resources Information Center

Discusses the strengths and limitations of the current pragmatic focus of research in suicidology and presents an argument for theoretical grounding as a precursor for continued advancement in this area. Presents an existential-constructivist framework of "meaning creation" as a theoretical heuristic for understanding suicide. Outlines general…

Rogers, James R.

2001-01-01

270

Sustainability Framework 1 Queen's University  

E-print Network

Sustainability Framework 1 Queen's University Sustainability Strategic Framework #12;Sustainability Framework 2 Contents Introduction .................................................................................................................................................. 2 Queen's Sustainability Mission

Abolmaesumi, Purang

271

An impulse framework for hydrodynamic force analysis : fish propulsion, water entry of spheres, and marine propellers  

E-print Network

This thesis presents an impulse framework for analyzing the hydrodynamic forces on bodies in flow. This general theoretical framework is widely applicable, and it is used to address the hydrodynamics of fish propulsion, ...

Epps, Brenden P

2010-01-01

272

A Framework for Multi Robot Guidance Control  

NASA Astrophysics Data System (ADS)

In this paper we present a framework for path planning and path finding for multiple mobile robots with global vision. Our framework model considers the agents’ dynamic status and their environment with obstacles to perform given tasks. The global vision system provides feedback to main controller computer and mobile robots are directed towards to their tasks with avoiding obstacles and without any collision. Different kinds of scenario are prepared to simulate manipulating tasks and non-collision behavior with our framework. Experiment results with Lego Mindstorms NXT shows that our framework can be used where a multi robot system is needed with minimum resources.

Keskin, Onur; Uyar, Erol

273

The shuttle main engine: A first look  

NASA Technical Reports Server (NTRS)

Anyone entering the Space Shuttle Main Engine (SSME) team attends a two week course to become familiar with the design and workings of the engine. This course provides intensive coverage of the individual hardware items and their functions. Some individuals, particularly those involved with software maintenance and development, have felt overwhelmed by this volume of material and their lack of a logical framework in which to place it. To provide this logical framework, it was decided that a brief self-taught introduction to the overall operation of the SSME should be designed. To aid the people or new team members with an interest in the software, this new course should also explain the structure and functioning of the controller and its software. This paper presents a description of this presentation.

Schreur, Barbara

1996-01-01

274

Human-Centered Fusion Framework  

SciTech Connect

In recent years the benefits of fusing signatures extracted from large amounts of distributed and/or heterogeneous data sources have been largely documented in various problems ranging from biological protein function prediction to cyberspace monitoring. In spite of significant progress in information fusion research, there is still no formal theoretical framework for defining various types of information fusion systems, defining and analyzing relations among such types, and designing information fusion systems using a formal method approach. Consequently, fusion systems are often poorly understood, are less than optimal, and/or do not suit user needs. To start addressing these issues, we outline a formal humancentered fusion framework for reasoning about fusion strategies. Our approach relies on a new taxonomy for fusion strategies, an alternative definition of information fusion in terms of parameterized paths in signature related spaces, an algorithmic formalization of fusion strategies and a library of numeric and dynamic visual tools measuring the impact as well as the impact behavior of fusion strategies. Using a real case of intelligence analysis we demonstrate that the proposed framework enables end users to rapidly 1) develop and implement alternative fusion strategies, 2) understand the impact of each strategy, 3) compare the various strategies, and 4) perform the above steps without having to know the mathematical foundations of the framework. We also demonstrate that the human impact on a fusion system is critical in the sense that small changes in strategies do not necessarily correspond to small changes in results.

Posse, Christian; White, Amanda M.; Beagley, Nathaniel

2007-05-16

275

Airpower Application Framework: Modeling Coercive Airpower Strategies.  

National Technical Information Service (NTIS)

This study focuses on the development of a theoretical framework for the application of coercive airpower strategies that can be used in the construction of a decision aid for use by airpower strategists. The author begins this work by synthesizing the th...

A. M. Weigand

1998-01-01

276

Evaluation of Learning Materials: A Holistic Framework  

ERIC Educational Resources Information Center

This paper presents a holistic framework for evaluating learning materials and designs for learning. A holistic evaluation comprises investigations of the potential learning potential, the actualised learning potential, and the actual learning. Each aspect is explained and exemplified through theoretical models and definitions. (Contains 3 figures…

Bundsgaard, Jeppe; Hansen, Thomas Illum

2011-01-01

277

March 29, 2008 Operating Systems: Main Memory 1 Main Memory  

E-print Network

March 29, 2008 Operating Systems: Main Memory 1 Main Memory Chapter 8 #12;March 29, 2008 Operating Systems: Main Memory 2 Chapter Outline Background Contiguous Memory Allocation Paging Structure of the Page Table Segmentation #12;March 29, 2008 Operating Systems: Main Memory 3 Objectives To provide

Adam, Salah

278

Theoretical Computer Science  

E-print Network

Theoretical Computer Science ELSEVIER Theoretical Computer Science 188(1997)59-78 Lower boundsis the number of connected components of W. This implies non-trivia1 lower bounds for parallel. 14th Conf. of the FST & TCS. Madras. India, 1994. 0304.3975/97/$17.00 @ 1997 - Elsevier Science B

Sen, Sandeep

279

Theoretical Unification in Justice and Beyond  

Microsoft Academic Search

The goal of scientific work is to understand more and more by less and less. In this effort, theoretical unification plays\\u000a a large part. There are two main types of theoretical unification—unification of different theories of the same field of phenomena\\u000a and unification of theories of different fields of phenomena. Both types are usually a surprise; even when vigorously pursued,

Guillermina Jasso

2007-01-01

280

State of Maine's Environment 2010  

Microsoft Academic Search

The State of Maine's Environment is a regular series of reports written by senior environmental policy majors at Colby College in Waterville, Maine. The State of Maine's Environment 2010 is the sixth State of Maine's Environment report created by students enrolled in ES 493: Environmental Policy Practicum taught by Philip J. Nyhus, Environmental Studies Program. Topics in this report include

Philip J. Nyhus

2010-01-01

281

PET Image Reconstruction Using Information Theoretic Anatomical Priors  

PubMed Central

We describe a nonparametric framework for incorporating information from co-registered anatomical images into positron emission tomographic (PET) image reconstruction through priors based on information theoretic similarity measures. We compare and evaluate the use of mutual information (MI) and joint entropy (JE) between feature vectors extracted from the anatomical and PET images as priors in PET reconstruction. Scale-space theory provides a framework for the analysis of images at different levels of detail, and we use this approach to define feature vectors that emphasize prominent boundaries in the anatomical and functional images, and attach less importance to detail and noise that is less likely to be correlated in the two images. Through simulations that model the best case scenario of perfect agreement between the anatomical and functional images, and a more realistic situation with a real magnetic resonance image and a PET phantom that has partial volumes and a smooth variation of intensities, we evaluate the performance of MI and JE based priors in comparison to a Gaussian quadratic prior, which does not use any anatomical information. We also apply this method to clinical brain scan data using F18 Fallypride, a tracer that binds to dopamine receptors and therefore localizes mainly in the striatum. We present an efficient method of computing these priors and their derivatives based on fast Fourier transforms that reduce the complexity of their convolution-like expressions. Our results indicate that while sensitive to initialization and choice of hyperparameters, information theoretic priors can reconstruct images with higher contrast and superior quantitation than quadratic priors. PMID:20851790

Somayajula, Sangeetha; Panagiotou, Christos; Rangarajan, Anand; Li, Quanzheng; Arridge, Simon R.

2011-01-01

282

The theoretical and policy implications of knowledge codification  

Microsoft Academic Search

The purpose of the following contribution is to present the main consequences in terms of policy of firms and governments that emerged from the theoretical and empirical work achieved under the TIPIK project. In a first part, the introduction is devoted to a summing-up of the main theoretical dimensions used in TIPIK, that led in particular to a special issue

Patrick Cohendet; Frieder Meyer-Krahmer

2001-01-01

283

Coding for system-on-chip networks: a unified framework  

Microsoft Academic Search

ABSTRACT In this paper, we present a coding framework derived from a communication-theoretic view of a DSM bus to jointly address power, delay, and reliability. In this framework, the data is first passed through a nonlinear source coder that reduces self and coupling transition activity and im- poses a constraint on the peak coupling transitions on the bus. Next, a

Srinivasa R. Sridhara; Naresh R. Shanbhag

2005-01-01

284

A learning-based framework for manufacturing system design  

Microsoft Academic Search

Existing literature suggest that learning occur at three levels: individual, team and organizational. Although there have been theoretical models at all three levels, the research efforts to integrate them are limited. This paper proposes a learning-based framework that integrates previous learning theories at different levels. The framework was then used to explain how to overcome learning barriers in various aspects

Xiao-mei Qi; Qiang Tu

2011-01-01

285

On constructing a fuzzy inference framework using crisp decision trees  

Microsoft Academic Search

This paper proposes a framework which consists of a novel fuzzy inference algorithm to generate fuzzy decision trees from induced crisp decision trees. Fuzzy theoretical techniques are used to fuzzify crisp decision trees in order to soften sharp decision boundaries at decision nodes inherent in this type of trees. A framework for the investigation of various types of membership functions

Keeley A. Crockett; Zuhair Bandar; David Mclean; James O’Shea

2006-01-01

286

Collaborative intelligent CAD framework incorporating design history tracking algorithm  

Microsoft Academic Search

This paper shows a new and efficient collaborative intelligent Computer Aided Design (CAD) framework in a theoretical study. While other collaborative CAD frameworks or protocols focus on decreasing the waiting time for updating design or communication methods for design review among collaborative designers, the suggested collaborative design protocol determines the next design ownership criterion with the objective of minimizing redundant

Hyunsoo Lee; Jonghyun Kim; Amarnath Banerjee

2010-01-01

287

37. Fore and main masts, and main boom lying in ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

37. Fore and main masts, and main boom lying in storage yard. Stern of Museum Ship Wavetreet to left in photograph. - Schooner "Lettie G. Howard", South Street Seaport Museum, New York, New York County, NY

288

ANU POLICY FRAMEWORK INTRODUCTION  

E-print Network

the authority to approve policies and procedures for publication. POLICY FRAMEWORK HIERARCHY 4. The figure below1 | ANU POLICY FRAMEWORK INTRODUCTION 1. The Australian National University governs its operations through Government legislation and University legislation (statutes, rules, orders), policies, procedures

Botea, Adi

289

Choices, frameworks and refinement  

Microsoft Academic Search

Presents a method for designing operating systems using object-oriented frameworks. A framework can be refined into subframeworks. Constraints specify the interactions between the subframeworks. The authors describe how they used object-oriented frameworks to design Choices, an object-oriented operating system

Roy H. Campbell; Nayeem Islam; Ralph Johnson; Panos Kougiouris; Peter Madany

1991-01-01

290

Choices, Frameworks and Refinement  

NASA Technical Reports Server (NTRS)

In this paper we present a method for designing operating systems using object-oriented frameworks. A framework can be refined into subframeworks. Constraints specify the interactions between the subframeworks. We describe how we used object-oriented frameworks to design Choices, an object-oriented operating system.

Campbell, Roy H.; Islam, Nayeem; Johnson, Ralph; Kougiouris, Panos; Madany, Peter

1991-01-01

291

Theoretical Division Progress Report.  

National Technical Information Service (NTIS)

This report presents highlights of activities in the Theoretical (T) Division from October 1976-January 1979. The report is divided into three parts. Part I presents an overview of the Division: its unique function at the Los Alamos Scientific Laboratory ...

N. G. Cooper

1979-01-01

292

EXPLORATORY FISHING FOR MAINE HERRING  

E-print Network

of Maine waters were sounded and fished with a lampara seine, gill nets, midwater trawls, and otter trawls for Atlantic herring and to carry on research and developmental work on sardine fishing gear. Original efforts sought along the Maine coast and in the Gulf of Maine. Otter trawl surveys were made during the winters

293

Cosmological Models (mainly relativistic Cosmology)  

E-print Network

COSMOLOGY Cosmological Models (mainly relativistic Cosmology) [References] c 2009, F. Jegerlehner R Lect. 5 R 301 #12;COSMOLOGY Cosmological Models (mainly relativistic Cosmology) [References] Objects our local experience. c 2009, F. Jegerlehner R Lect. 5 R 301 #12;COSMOLOGY Cosmological Models (mainly

Peters, Achim

294

Technical Report TR-CS_01_07 A Game Theoretic Approach toward Multi-Party  

E-print Network

Technical Report TR-CS_01_07 A Game Theoretic Approach toward Multi-Party Privacy;A Game Theoretic Approach toward Multi-Party Privacy-Preserving Distributed Data Mining Hillol where each party tries to maximize its own objectives. It develops a game-theoretic framework

Kargupta, Hilol

295

Theoretical models of culture shock and adaptation in international students in higher education  

Microsoft Academic Search

Theoretical concepts of culture shock and adaptation are reviewed, as applied to the pedagogical adaptation of student sojourners in an unfamiliar culture. The historical development of ‘traditional’ theories of culture shock led to the emergence of contemporary theoretical approaches, such as ‘culture learning’, ‘stress and coping’ and ‘social identification’. These approaches can be accommodated within a broad theoretical framework based

Yuefang Zhou; Keith Topping; John Todman

2008-01-01

296

A Formal Framework for Mobile Robot Patrolling in Arbitrary Environments with Adversaries  

E-print Network

Using mobile robots for autonomous patrolling of environments to prevent intrusions is a topic of increasing practical relevance. One of the most challenging scientific issues is the problem of finding effective patrolling strategies that, at each time point, determine the next moves of the patrollers in order to maximize some objective function. In the very last years this problem has been addressed in a game theoretical fashion, explicitly considering the presence of an adversarial intruder. The general idea is that of modeling a patrolling situation as a game, played by the patrollers and the intruder, and of studying the equilibria of this game to derive effective patrolling strategies. In this paper we present a game theoretical formal framework for the determination of effective patrolling strategies that extends the previous proposals appeared in the literature, by considering environments with arbitrary topology and arbitrary preferences for the agents. The main original contributions of this paper ar...

Basilico, Nicola; Amigoni, Francesco

2009-01-01

297

Oblique view, looking eastsoutheast, of main gatehouse, main entrance, and ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Oblique view, looking east-southeast, of main gatehouse, main entrance, and battery storage house. East side of canal wall in foreground - Grand Valley Diversion Dam, Half a mile north of intersection of I-70 & Colorado State Route 65, Cameo, Mesa County, CO

298

View of the main interior space facing east. The main ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

View of the main interior space facing east. The main entry is on the left hand side at the rear. The exit to the deck is to the right. - San Luis Yacht Club, Avila Pier, South of Front Street, Avila Beach, San Luis Obispo County, CA

299

A framework to analyse gender bias in epidemiological research  

PubMed Central

The design and analysis of research may cause systematic gender dependent errors to be produced in results because of gender insensitivity or androcentrism. Gender bias in research could be defined as a systematically erroneous gender dependent approach related to social construct, which incorrectly regards women and men as similar/different. Most gender bias can be found in the context of discovery (development of hypotheses), but it has also been found in the context of justification (methodological process), which must be improved. In fact, one of the main effects of gender bias in research is partial or incorrect knowledge in the results, which are systematically different from the real values. This paper discusses some forms of conceptual and methodological bias that may affect women's health. It proposes a framework to analyse gender bias in the design and analysis of research carried out on women's and men's health problems, and on specific women's health issues. Using examples, the framework aims to show the different theoretical perspectives in a social or clinical research context where forms of selection, measurement and confounding bias are produced as a result of gender insensitivity. Finally, this paper underlines the importance of re?examining results so that they may be reinterpreted to produce new gender based knowledge. PMID:18000118

Ruiz-Cantero, Maria Teresa; Vives-Cases, Carmen; Artazcoz, Lucia; Delgado, Ana; del Mar Garcia Calvente, Maria; Miqueo, Consuelo; Montero, Isabel; Ortiz, Rocio; Ronda, Elena; Ruiz, Isabel; Valls, Carme

2007-01-01

300

POLYFLOW theoretical background  

NASA Astrophysics Data System (ADS)

In the scope of the 1990-04 lecture series on computational fluid dynamics, a finite element program is described. POLYFLOW was designed for the analysis of industrial processes dominated by nonlinear viscous phenomena and viscoelastic effects. It is based on the general principles of continuum mechanics, together with phenomenological or kinetic theoretical models for describing the rheological behavior of the fluid. The theoretical background, necessary to understand the models, and numerical techniques used in POLYFLOW, are provided. The governing equations, their finite element formulations and the solution procedures are summarized.

Crochet, M. J.

301

Distributed visualization framework architecture  

NASA Astrophysics Data System (ADS)

An architecture for distributed and collaborative visualization is presented. The design goals of the system are to create a lightweight, easy to use and extensible framework for reasearch in scientific visualization. The system provides both single user and collaborative distributed environment. System architecture employs a client-server model. Visualization projects can be synchronously accessed and modified from different client machines. We present a set of visualization use cases that illustrate the flexibility of our system. The framework provides a rich set of reusable components for creating new applications. These components make heavy use of leading design patterns. All components are based on the functionality of a small set of interfaces. This allows new components to be integrated seamlessly with little to no effort. All user input and higher-level control functionality interface with proxy objects supporting a concrete implementation of these interfaces. These light-weight objects can be easily streamed across the web and even integrated with smart clients running on a user's cell phone. The back-end is supported by concrete implementations wherever needed (for instance for rendering). A middle-tier manages any communication and synchronization with the proxy objects. In addition to the data components, we have developed several first-class GUI components for visualization. These include a layer compositor editor, a programmable shader editor, a material editor and various drawable editors. These GUI components interact strictly with the interfaces. Access to the various entities in the system is provided by an AssetManager. The asset manager keeps track of all of the registered proxies and responds to queries on the overall system. This allows all user components to be populated automatically. Hence if a new component is added that supports the IMaterial interface, any instances of this can be used in the various GUI components that work with this interface. One of the main features is an interactive shader designer. This allows rapid prototyping of new visualization renderings that are shader-based and greatly accelerates the development and debug cycle.

Mishchenko, Oleg; Raman, Sundaresan; Crawfis, Roger

2010-01-01

302

Maine: Early Head Start Initiatives  

ERIC Educational Resources Information Center

Maine has two initiatives that build on Early Head Start (EHS). The first initiative, Fund for a Healthy Maine, has since 2001 provided tobacco settlement money to existing Head Start and EHS programs to expand the number of children who receive full-day, full-year services. Local programs have the option of using these funds for EHS, depending on…

Center for Law and Social Policy, Inc. (CLASP), 2012

2012-01-01

303

Teachers Implementing Context-Based Teaching Materials: A Framework for Case-Analysis in Chemistry  

ERIC Educational Resources Information Center

We present a framework for analysing the interplay between context-based teaching material and teachers, and for evaluating the adequacy of the resulting implementation of context-based pedagogy in chemistry classroom practice. The development of the framework is described, including an account of its theoretical foundations. The framework needs…

Vos, Martin A. J.; Taconis, Ruurd; Jochems, Wim M. G.; Pilot, Albert

2010-01-01

304

To, from and beyond the margins : Business models: towards an integrative framework  

Microsoft Academic Search

Purpose – The purpose of this paper is to provide an integrative framework on business models that combines and connects concepts pertinent to the literatures of strategy, entrepreneurship, and organization. Design\\/methodology\\/approach – The paper describes the framework's theoretical development. Findings – The framework enriches the discussion on business models by providing a life cycle perspective. Research limitations\\/implications – This paper

Luis Vives; Silviya Svejenova

2011-01-01

305

Journal of Theoretical Biology ] (  

E-print Network

of blastomeres in sea urchin eggs are coherently explained, while some theoretical predictions are made. We observed successive differentiation from a cell type with diverse chemicals and chaotic only from a specific type of cell, i.e. germ cells, recursive production with morphogenetic diversity

Kaneko, Kunihiko

306

Theoretical aspects of cephalosporin isomerism  

SciTech Connect

The {triangle}{sup 3} double bond of cephalosporins isomerizes to the {triangle}{sup 2} position, resulting in biological inactivation of these antibiotics. This phenomenon occurs slowly in the case of cephalosporanic acids, but is rapid when the 4-carboxylate moiety is esterified or otherwise derivatized, leading to an equilibrium between the {triangle}{sup 2} and {triangle}{sup 3} forms. A theoretical study of this isomerization is described in the framework of two semiempirical all-valence electron molecular orbital (MO) approximations, namely MNDO and AMI. Specifically, the methyl ester and free carboxylate derivatives of both the {triangle}{sup 3} and {triangle}{sup 2} isomers of 7-phenylacetamidocephalosporin were studied. The results obtained indicated that the {triangle}{sup 3} derivatives were thermodynamically more stable than were the {triangle}{sup 2} isomers both in the case of the free acids and methyl esters. These data are consistent with experimental findings and suggest that the more rapid isomerization demonstrated in the case of the esters is due primarily to kinetic rather than to thermodynamic factors. Examination of the calculated molecular structures lend support to various theories that correlate the inactivity of the {triangle}{sup 2} isomers with spatial considerations and the degree of {beta}-lactam amide resonance.

Pop, E.; Brewster, M.E.; Bodor, N. (Pharmatec, Inc., Alachua, FL (USA) Univ. of Florida, Gainesville (USA)); Kaminski, J.J. (Schering-Plough Corp., Bloomfield, NJ (USA))

1989-01-01

307

Information security framework  

Microsoft Academic Search

This paper focuses on the holistic framework proposed includes the following clusters of ideas: purpose and role of information security, societal trends, human elements, changing technologies, information security management, and complexity and interactions. These multiple views of information security provide a more complete framework in which to embed much of the global research in information security. Future directions and possible

Kay Fielden

2010-01-01

308

Frameworks of Educational Technology  

ERIC Educational Resources Information Center

This paper, written from a 20th-century perspective, traces the development of, and influences on, the field of instructional technology and attempts to describe a framework within which we can better understand the field. [This article is based on "Instructional Technology: Contemporary Frameworks" originally written by the author for the…

Ely, Donald

2008-01-01

309

A framework for consciousness  

Microsoft Academic Search

Here we summarize our present approach to the problem of consciousness. After an introduction outlining our general strategy, we describe what is meant by the term 'framework' and set it out under ten headings. This framework offers a coherent scheme for explaining the neural correlates of (visual) consciousness in terms of competing cellular assemblies. Most of the ideas we favor

Francis Crick; Christof Koch

2003-01-01

310

Introduction Legal Framework  

E-print Network

or "private" profile? · Do you limit what you put online? #12;Introduction Legal Framework Privacy Enhancing online? · Who segregates between different types of people? · Who is aware of your friends privacy settings? #12;Introduction Legal Framework Privacy Enhancing Technologies Conclusion Radboud University

Hoepman, Jaap-Henk

311

Reverse logistics - a framework  

Microsoft Academic Search

In this paper we define and compare Reverse Logistics definitions. We start by giving an understanding framework of Reverse Logistics: the why-what-how. By this means, we put in context the driving forces for Reverse Logistics, a typology of return reasons, a classification of products, processes and actors. In addition we provide a decision framework for Reverse Logistics and we present

Marisa P. de Brito; Rommert Dekker

2002-01-01

312

2007 Mississippi Mathematics Framework  

ERIC Educational Resources Information Center

The primary purpose of the "2007 Mississippi Mathematics Framework" is to provide a basis for curriculum development for K-12 teachers. The framework provides an outline of what students should learn through competencies and objectives/benchmarks. Suggested teaching strategies and assessments for those strategies are correlated to the…

Mississippi Department of Education, 2006

2006-01-01

313

P21 Framework Definitions  

ERIC Educational Resources Information Center

To help practitioners integrate skills into the teaching of core academic subjects, the Partnership for 21st Century Skills has developed a unified, collective vision for learning known as the Framework for 21st Century Learning. This Framework describes the skills, knowledge and expertise students must master to succeed in work and life; it is a…

Partnership for 21st Century Skills, 2009

2009-01-01

314

Sustainable transport: analysis frameworks  

Microsoft Academic Search

For both passenger and freight transport, this paper presents analysis frameworks illustrating the interaction of factors that influence indicators of transport sustainability; identifies opportunities for policy intervention; and illustrates the possibility of unintended consequences of such intervention and the tradeoffs among the indicators. The frameworks account for systematic relationships, feedbacks, and rebound effects of making changes to the system. For

Barbara C. Richardson

2005-01-01

315

A review of telehealth service implementation frameworks.  

PubMed

Despite the potential of telehealth services to increase the quality and accessibility of healthcare, the success rate of such services has been disappointing. The purpose of this paper is to find and compare existing frameworks for the implementation of telehealth services that can contribute to the success rate of future endeavors. After a thorough discussion of these frameworks, this paper outlines the development methodologies in terms of theoretical background, methodology and validation. Finally, the common themes and formats are identified for consideration in future implementation. It was confirmed that a holistic implementation approach is needed, which includes technology, organizational structures, change management, economic feasibility, societal impacts, perceptions, user-friendliness, evaluation and evidence, legislation, policy and governance. Furthermore, there is some scope for scientifically rigorous framework development and validation approaches. PMID:24464237

van Dyk, Liezl

2014-02-01

316

Humboldt River main stem, Nevada  

USGS Publications Warehouse

This data set contains the main stem of the Humboldt River as defined by Humboldt Project personnel of the U.S. Geological Survey Nevada District, 2001. The data set was digitized on screen using digital orthophoto quadrangles from 1994.

Warmath, Eric; Medina, Rose L.

2001-01-01

317

UNIVERSITY OF MAINE STUDENT LIFE  

E-print Network

UNIVERSITY OF MAINE STUDENT LIFE CAMPUS RECREATION RELEASE AND ASSUMPTION OF RISK *** PLEASE PRINT:______________________________________________________), of : (________________________________________________________________________), Street Address City State Zip (Email: ______________________________________), (Phone force and effect. I declare that I completely understand and have fully informed myself of the terms

Thomas, Andrew

318

Virtual Tour of Maine Geology  

NSDL National Science Digital Library

This selection of slide shows provides a photographic tour of Maine geology. Users can choose slide shows on surficial, bedrock, and coastal geology; fossils, geologic hazards, groundwater and wells; or mineral collecting, mining, and quarrying.

319

Space Shuttle Era: Main Engines  

NASA Video Gallery

Producing 500,000 pounds of thrust from a package weighing only 7,500 pounds, the Space Shuttle Main Engines are one of the shining accomplishments of the shuttle program. The success did not come ...

320

Theoretical study on high order interior tomography  

PubMed Central

In this paper, we study a new type of high order interior problems characterized by high order differential phase shift measurement. This problem is encountered in local x-ray phase-contrast tomography. Here we extend our previous theoretical framework from interior CT to interior differential phase-contrast tomography, and establish the solution uniqueness in this context. We employ the analytic continuation method and high order total variation minimization which we developed in our previous work for interior CT, and prove that an image in a region of interest (ROI) can be uniquely reconstructed from truncated high order differential projection data if the image is known a priori in a sub-region of the ROI or the image is piecewise polynomial in the ROI. Preliminary numerical experiments support the theoretical finding. PMID:23324783

Yang, Jiansheng; Cong, Wenxiang; Jiang, Ming; Wang, Ge

2013-01-01

321

A theoretical trombone  

NASA Astrophysics Data System (ADS)

What follows is a description of a theoretical model designed to calculate the playing frequencies of the musical pitches produced by a trombone. The model is based on quantitative treatments that demonstrate the effects of the flaring bell and cup-shaped mouthpiece sections on these frequencies and can be used to calculate frequencies that compare well to both the desired frequencies of the musical pitches and those actually played on a real trombone.

LoPresto, Michael C.

2014-09-01

322

Modern Physics : Theoretical Minimum  

NSDL National Science Digital Library

This Stanford Continuing Studies course is a collection of video lectures that provide a concise introduction to Theoretical Physics. The goal is for students following the curriculum to achieve a solid understanding of Modern Physics in an optimized manner. The lectures in the series cover Classical Mechanics, Quantum Mechanics, Special Relativity, General Relativity, Cosmology, Statistical Mechanics, Quantum Entanglement, Basic Particle Physics, and the Standard Model. While the courses build upon one another, each course also stands on its own.

Susskind, Leonard

2014-05-01

323

Panorama of theoretical physics  

NASA Astrophysics Data System (ADS)

We shall start this panorama of theoretical physics by giving an overview of physics in general, this branch of knowledge that has been taken since the scientific revolution as the archetype of the scientific discipline. We shall then proceed in showing in what way theoretical physics from Newton to Maxwell, Einstein, Feynman and the like, in all modesty, could be considered as the ticking heart of physics. By its special mode of inquiry and its tantalizing successes, it has capturing the very spirit of the scientific method, and indeed it has been taken as a role model by other disciplines all the way from the "hard" ones to the social sciences. We shall then review how much we know today of the world of matter, both in term of its basic content and in the way it is structured. We will then present the dreams of today's theoretical physics as a way of penetrating into its psyche, discovering in this way its aspirations and longing in much the same way that a child's dreams tell us about his yearning and craving. Yet our understanding of matter has been going in the past decades through a crisis of sort. As a necessary antidote, we shall thus discuss the pitfalls of dreams pushed too far….

Mimouni, J.

2012-06-01

324

The Theoretical Foundation for Intercultural Business Communication: A Conceptual Model  

Microsoft Academic Search

This article develops a theoretical framework for intercultural business communica tion which sets it apart from intercultural communication and international busi ness. In the past, discussions on the theory of intercultural business communica tion have mostly focused on intercultural communication using business as examples rather than including business as a distinct variable. The model pre sented here discusses the intercultural,

Iris I. Varner

2000-01-01

325

Remodeling of the bone material containing microcracks: A theoretical analysis  

Microsoft Academic Search

The question is, what happens when the bone loses its ability for load-driven adaptation, when damage is no longer repaired as it seems to be the case for bone loss associated with age, medication or disease? In this study, we tempt to show how damage can influence the remodeling process. A thermodynamic theoretical framework is therefore provided as a basis

S. Ramtani; M. Zidi

1999-01-01

326

Nonscience Majors Learning Science: A Theoretical Model of Motivation  

ERIC Educational Resources Information Center

A theoretical model of nonscience majors' motivation to learn science was tested by surveying 369 students in a large-enrollment college science course that satisfies a core curriculum requirement. Based on a social-cognitive framework, motivation to learn science was conceptualized as having both cognitive and affective influences that foster…

Glynn, Shawn M.; Taasoobshirazi, Gita; Brickman, Peggy

2007-01-01

327

A Game Theoretic Approach to Multi-User Spectrum Allocation  

Microsoft Academic Search

We consider the interaction of several transmit-receive pairs coexisting in the same area and communicating using the same portion of the spectrum. Using a game theoretic framework, each pair is regarded as a player whose payoff function is the individual link rate and power is allocated using the iterative water-filling algorithm. We find properties of the resulting Nash equilibria and

Peter von Wrycza; M. R. Bhavani Shankar; Mats Bengtsson; Björn E. Ottersten

2009-01-01

328

Title of dissertation: EVOLUTIONARY GAME THEORETIC MODELING OF DECISION MAKING  

E-print Network

ABSTRACT Title of dissertation: EVOLUTIONARY GAME THEORETIC MODELING OF DECISION MAKING AND CULTURE Evolutionary Game Theory (EGT) has become an attractive framework for modeling human behavior because of cooperation and ii) the relationship between societal threat and the propensity with which agents of societies

Nau, Dana S.

329

Theoretical Models of Parental HIV Disclosure: A Critical Review  

PubMed Central

This review critically examined three major theoretical models related to parental HIV disclosure (i.e., the Four-Phase Model, the Disclosure Decision Making Model, and the Disclosure Process Model), and the existing studies that could provide empirical support to these models or their components. For each model, we briefly reviewed its theoretical background, described its components and or mechanisms, and discussed its strengths and limitations. The existing empirical studies supported most theoretical components in these models. However, hypotheses related to the mechanisms proposed in the models have not yet tested due to a lack of empirical evidence. This review also synthesized alternative theoretical perspectives and new issues in disclosure research and clinical practice that may challenge the existing models. The current review underscores the importance of including components related to social and cultural contexts in theoretical frameworks, and calls for more adequately designed empirical studies in order to test and refine existing theories and to develop new ones. PMID:22866903

Qiao, Shan; Li, Xiaoming; Stanton, Bonita

2012-01-01

330

A conceptual framework for marine agronomy  

Microsoft Academic Search

Between the late 1960s and the early 1980s, several generations of phycologists in Hawaii and the Philippines, associated with M. S. Doty, contributed to developing a new approach, and to advance concepts in marine agronomy. This study reviews the approach and the main concepts contributed. Integrating these contributions with others, a basic conceptual framework for marine agronomy is presented.

B. Santelices

1999-01-01

331

Free Parameters and Frameworks in Minimal Supersymmetry  

E-print Network

405 Appendix A Free Parameters and Frameworks in Minimal Supersymmetry It is useful to discuss what the various schemes that exist for reducing the set of free parameters to a manageable number. The information, and so is fixed by experiment. The free parameters consist mainly of the coe#cients of the ``soft

California at Berkeley, University of

332

Free Parameters and Frameworks in Minimal Supersymmetry  

E-print Network

405 Appendix A Free Parameters and Frameworks in Minimal Supersymmetry It is useful to discuss what the various schemes that exist for reducing the set of free parameters to a manageable number. The information, and so is fixed by experiment. The free parameters consist mainly of the coefficients of the "soft

California at Berkeley, University of

333

Flower power: the armoured expert in the CanMEDS competency framework?  

Microsoft Academic Search

Competency frameworks based on roles definitions are currently being used extensively in health professions education internationally.\\u000a One of the most successful and widely used models is the CanMEDS Roles Framework. The medical literature has raised questions\\u000a about both the theoretical underpinnings and the practical application of outcomes-based frameworks, however little empirical\\u000a research has yet been done examining specific roles frameworks.

Cynthia R. Whitehead; Zubin Austin; Brian D. Hodges

334

Theoretical Tools in Modeling Communication and Language Dynamics  

NASA Astrophysics Data System (ADS)

Statistical physics has proven to be a very fruitful framework to describe phenomena outside the realm of traditional physics. In social phenomena, the basic constituents are not particles but humans and every individual interacts with a limited number of peers, usually negligible compared to the total number of people in the system. In spite of that, human societies are characterized by stunning global regularities that naturally call for a statistical physics approach to social behavior, i.e., the attempt to understand regularities at large scale as collective effects of the interaction among single individuals, considered as relatively simple entities. This is the paradigm of Complex Systems: an assembly of many interacting (and simple) units whose collective behavior is not trivially deducible from the knowledge of the rules governing their mutual interactions. In this chapter we review the main theoretical concepts and tools that physics can borrow to socially-motivated problems. Despite their apparent diversity, most research lines in social dynamics are actually closely connected from the point of view of both the methodologies employed and, more importantly, of the general phenomenological questions, e.g., what are the fundamental interaction mechanisms leading to the emergence of consensus on an issue, a shared culture, a common language or a collective motion?

Loreto, Vittorio

335

Lung morphometry with hyperpolarized 129Xe: theoretical background.  

PubMed

The (3) He lung morphometry technique, based on MRI measurements of hyperpolarized (3) He gas diffusion in lung airspaces, provides unique information on the lung microstructure at the alveolar level. In vivo 3D tomographic images of standard morphological parameters (airspace chord length, lung parenchyma surface-to-volume ratio, and number of alveoli per unit volume) can be generated from a rather short (several seconds) MRI scan. The technique is based on a theory of gas diffusion in lung acinar airways and experimental measurements of diffusion-attenuated MRI signal. The present work aims at developing the theoretical background of a similar technique based on hyperpolarized (129) Xe gas. As the diffusion coefficient and gyromagnetic ratio of (129) Xe gas are substantially different from those of (3) He gas, the specific details of the theory and experimental measurements with (129) Xe should be amended. We establish phenomenological relationships between acinar airway geometrical parameters and the diffusion-attenuated MR signal for human and small animal lungs, both normal lungs and lungs with mild emphysema. Optimal diffusion times are shown to be about 5 ms for human and 1.3 ms for small animals. The expected uncertainties in measuring main morphometrical parameters of the lungs are estimated in the framework of Bayesian probability theory. PMID:21713985

Sukstanskii, A L; Yablonskiy, D A

2012-03-01

336

THEORETICAL AND COMPUTATIONAL APPROACH TO CHEMICAL EVALUATION BASED ON STRUCTURE-ACTIVITY RELATIONSHIPS  

EPA Science Inventory

During the past ten years we have been developing relationships to predict physical, chemical, environmental, and toxicological properties of chemicals directly from structure. he fundamental framework of our approach is to propose a theoretical basis for such relationships, comp...

337

A Theoretical Analysis of Cross-Cultural Research in Cognitive Development: Piaget's Conservation Task  

ERIC Educational Resources Information Center

The conservation task is analyzed into three essential components, a theoretical framework for interpreting cross-cultural studies is presented, and its applicability to existing empirical results is demonstrated. (JM)

Furby, Lita

1971-01-01

338

Theoretical Astrophysics at Fermilab  

NASA Technical Reports Server (NTRS)

The Theoretical Astrophysics Group works on a broad range of topics ranging from string theory to data analysis in the Sloan Digital Sky Survey. The group is motivated by the belief that a deep understanding of fundamental physics is necessary to explain a wide variety of phenomena in the universe. During the three years 2001-2003 of our previous NASA grant, over 120 papers were written; ten of our postdocs went on to faculty positions; and we hosted or organized many workshops and conferences. Kolb and collaborators focused on the early universe, in particular and models and ramifications of the theory of inflation. They also studied models with extra dimensions, new types of dark matter, and the second order effects of super-horizon perturbations. S tebbins, Frieman, Hui, and Dodelson worked on phenomenological cosmology, extracting cosmological constraints from surveys such as the Sloan Digital Sky Survey. They also worked on theoretical topics such as weak lensing, reionization, and dark energy. This work has proved important to a number of experimental groups [including those at Fermilab] planning future observations. In general, the work of the Theoretical Astrophysics Group has served as a catalyst for experimental projects at Fennilab. An example of this is the Joint Dark Energy Mission. Fennilab is now a member of SNAP, and much of the work done here is by people formerly working on the accelerator. We have created an environment where many of these people made transition from physics to astronomy. We also worked on many other topics related to NASA s focus: cosmic rays, dark matter, the Sunyaev-Zel dovich effect, the galaxy distribution in the universe, and the Lyman alpha forest. The group organized and hosted a number of conferences and workshop over the years covered by the grant. Among them were:

2004-01-01

339

South Columbia Street (Main Hospital)  

E-print Network

W est N ew Mason Farm R oad di M anning Drive Drive Deck Cardinal Hospital NC Neuro- Infirmary NC 2 East Wing Patient Support Wing Parking Dogwood Deck UNC HOSPITALS Children's NC Memorial NC Women's cal South Columbia Street wood Dri Pit D rive Drive West ve (Main Hospital) Old Tarrson Brauer Dental

Whitton, Mary C.

340

South Columbia Street (Main Hospital)  

E-print Network

W est N ew Mason Farm R oad di M anning Drive Drive Deck Cardinal Hospital NC Neuro- Infirmary NC 2 Wing Patient Support Wing Parking Dogwood Deck UNC HOSPITALS Children's NC Memorial NC Women's cal South Columbia Street wood Dri Pit D rive Drive West ve (Main Hospital) Old Brauer Tarrson Koury Oral

Doyle, Martin

341

South Columbia Street (Main Hospital)  

E-print Network

W est New Mason Farm Road M anning Drive Drive Deck Cardinal Hospital NC Neuro- Infirmary NC 2nd Wing Patient Support Wing Parking Dogwood Deck UNC HOSPITALS Children's NC Memorial NC Women's cal South Columbia Street wood Dri P Drive Drive West ve (Main Hospital) Old Tarrson Brauer Dental Research

Whitton, Mary C.

342

UC Santa Cruz Main Entrance  

E-print Network

UC Santa Cruz West Entrance Em pire Grade Main Entrance HagarDrive Coolid geDrive P H ellerSt. Mission St. Bay St. Bay St. WesternDr. University of California Santa Cruz campus GlennCoolidgeDr. Water meters are posted regarding hours of enforcement. S T Campus shuttle stop Santa Cruz Metro bus stop

Wilmers, Chris

343

Main tank injection pressurization program  

NASA Technical Reports Server (NTRS)

Computer program predicts performance of fluorine-hydrogen main tank injection pressurization system for full range of liquid-hydrogen-fueled space vehicles. Analytical model includes provisions for heat transfer, injectant jet penetration, and ullage gas mixing. Analysis predicts GF2 usage, ullage gas and tank wall temperatures, and LH2 evaporation.

Cady, E. C.; Kendle, D. W.

1972-01-01

344

MAIN STREET WEST COLLEGE CRESCENT  

E-print Network

.................................... 43 David Braley Athletic Centre.... 54 Divinity College............................ 17 Dramatic Arts 11 MAIN STREET WEST COLLEGE CRESCENT COOTESDRIVE WESTAWAY ROAD SCHOLAR'S ROAD STEARN DRIVE EntranceCampus LEGEND McMaster University Entrance Security and Parking Services Parking Lot Location Pay Stations Short

Thompson, Michael

345

Strategic petroleum reserves in Maine  

Microsoft Academic Search

An evaluation was made to determine if the State of Maine should develop a State petroleum storage reserve to protect its economic and social vitality against future petroleum shortages. The requirements for residual oil are delineated and alternate storage options are described. The adequacy of the National Strategic Petroleum Reserve Program (S.P.R.) as a tool for alleviating shortfalls of residual

Tibbetts

1977-01-01

346

UC Santa Cruz Main Entrance  

E-print Network

COFFEE SHOP PAGE SMITH LIBRARY RR RR RR RR COWELL/STEVENSON MAIN ENTRANCE COLLEGE OFFICE DINING COMMONS The Eloise Pickard Smith Gallery is located in Cowell College, in the southeast corner of the campus coreLaughlin Drive, turn left at the second opportunity, following the sign for Cowell College. There are several

Wilmers, Chris

347

Main Title Details Author ISBN  

E-print Network

Main Title Details Author ISBN Price to Bookstore Price to Students Pub Date Silberschatz Price to Price to Savings to Student ISBN Bookstore Students $$ % Binder Ready Version (BRV 9781118063330 $132.00 $169.95 12/11/2012 Wiley Flex OPTIONS E-Textbooks Price to Savings to Student ISBN Status

Newhall, Tia

348

Library Site Finder MAIN LIBRARY  

E-print Network

Library Site Finder MAIN LIBRARY Burlington Street Tel: 0161 275 3751 THE ALAN GILBERT LEARNING COMMONS Oxford Road Tel: 0161 306 4306 ART & ARCHAEOLOGY LIBRARY Mansfield Cooper Building Tel: 0161 275 3657 BRADDICK LIBRARY School of Physics & Astronomy Brunswick Street Tel: 0161 275 4078 EDDIE DAVIES

Sidorov, Nikita

349

Spring MVC Framework  

Microsoft Academic Search

\\u000a In this chapter, you will learn web-based application development using the Spring MVC framework. Spring MVC is one of the\\u000a most important modules of the Spring framework. It builds on the powerful Spring IoC container and makes extensive use of\\u000a the container features to simplify its configuration. Most Spring MVC configurations are written in bean configuration files.

Gary Mak

350

A framework for comparing different image segmentation methods and its use in studying equivalences between level set and fuzzy connectedness frameworks  

PubMed Central

In the current vast image segmentation literature, there seems to be considerable redundancy among algorithms, while there is a serious lack of methods that would allow their theoretical comparison to establish their similarity, equivalence, or distinctness. In this paper, we make an attempt to fill this gap. To accomplish this goal, we argue that: (1) every digital segmentation algorithm A should have a well defined continuous counterpart MA, referred to as its model, which constitutes an asymptotic of A when image resolution goes to infinity; (2) the equality of two such models MA and MA? establishes a theoretical (asymptotic) equivalence of their digital counterparts A and A?. Such a comparison is of full theoretical value only when, for each involved algorithm A, its model MA is proved to be an asymptotic of A. So far, such proofs do not appear anywhere in the literature, even in the case of algorithms introduced as digitizations of continuous models, like level set segmentation algorithms. The main goal of this article is to explore a line of investigation for formally pairing the digital segmentation algorithms with their asymptotic models, justifying such relations with mathematical proofs, and using the results to compare the segmentation algorithms in this general theoretical framework. As a first step towards this general goal, we prove here that the gradient based thresholding model M? is the asymptotic for the fuzzy connectedness Udupa and Samarasekera segmentation algorithm used with gradient based affinity A?. We also argue that, in a sense, M? is the asymptotic for the original front propagation level set algorithm of Malladi, Sethian, and Vemuri, thus establishing a theoretical equivalence between these two specific algorithms. Experimental evidence of this last equivalence is also provided. PMID:21442014

Ciesielski, Krzysztof Chris; Udupa, Jayaram K.

2011-01-01

351

Strategies comparison for game theoretic cyber situational awareness and impact assessment  

Microsoft Academic Search

This paper compares different defense strategies against various attacks utilizing a dynamic game theoretic data fusion framework for Cyber network defense. In our game theoretic framework, alerts generated by intrusion detection sensors (IDSs) or intrusion prevention sensors (IPSs) are fed into the data refinement (Level 0) and object assessment (LI) data fusion components. High-level situation\\/threat assessment (L2\\/L3) data fusion based

Dan Shen; Genshe Chen; Leonard Haynes; Erik Blasch

2007-01-01

352

A Theoretical Analysis of Cross-Cultural Research in Cognitive Development: Piaget's Conservation Task  

Microsoft Academic Search

Cross-cultural studies of the conservation of continuous quantities are reviewed and the conservation task is analyzed into three essential components. A theoretical framework is presented for interpreting cross-cultural studies of conservation, and the applicability of such a framework to existing empirical results is demonstrated. The importance of this and similar cross-cultural analyses to a theoretical understanding of the development of

Lita Furby

1971-01-01

353

Dark matter: theoretical perspectives.  

PubMed Central

I both review and make the case for the current theoretical prejudice: a flat Universe whose dominant constituent is nonbaryonic dark matter, emphasizing that this is still a prejudice and not yet fact. The theoretical motivation for nonbaryonic dark matter is discussed in the context of current elementary-particle theory, stressing that (i) there are no dark-matter candidates within the "standard model" of particle physics, (ii) there are several compelling candidates within attractive extensions of the standard model of particle physics, and (iii) the motivation for these compelling candidates comes first and foremost from particle physics. The dark-matter problem is now a pressing issue in both cosmology and particle physics, and the detection of particle dark matter would provide evidence for "new physics." The compelling candidates are a very light axion (10(-6)-10(-4) eV), a light neutrino (20-90 eV), and a heavy neutralino (10 GeV-2 TeV). The production of these particles in the early Universe and the prospects for their detection are also discussed. I briefly mention more exotic possibilities for the dark matter, including a nonzero cosmological constant, superheavy magnetic monopoles, and decaying neutrinos. PMID:11607395

Turner, M S

1993-01-01

354

Dark matter: Theoretical perspectives  

SciTech Connect

I both review and make the case for the current theoretical prejudice: a flat Universe whose dominant constituent is nonbaryonic dark matter, emphasizing that this is still a prejudice and not yet fact. The theoretical motivation for nonbaryonic dark matter is discussed in the context of current elementary-particle theory, stressing that: (1) there are no dark matter candidates within the standard model of particle physics; (2) there are several compelling candidates within attractive extensions of the standard model of particle physics; and (3) the motivation for these compelling candidates comes first and foremost from particle physics. The dark-matter problem is now a pressing issue in both cosmology and particle physics, and the detection of particle dark matter would provide evidence for ``new physics.`` The compelling candidates are: a very light axion ( 10{sup {minus}6} eV--10{sup {minus}4} eV); a light neutrino (20 eV--90 eV); and a heavy neutralino (10 GeV--2 TeV). The production of these particles in the early Universe and the prospects for their detection are also discussed. I briefly mention more exotic possibilities for the dark matter, including a nonzero cosmological constant, superheavy magnetic monopoles, and decaying neutrinos.

Turner, M.S. [Chicago Univ., IL (United States). Enrico Fermi Inst.]|[Fermi National Accelerator Lab., Batavia, IL (United States)

1993-01-01

355

Dark matter: Theoretical perspectives  

SciTech Connect

I both review and make the case for the current theoretical prejudice: a flat Universe whose dominant constituent is nonbaryonic dark matter, emphasizing that this is still a prejudice and not yet fact. The theoretical motivation for nonbaryonic dark matter is discussed in the context of current elementary-particle theory, stressing that: (1) there are no dark matter candidates within the standard model of particle physics; (2) there are several compelling candidates within attractive extensions of the standard model of particle physics; and (3) the motivation for these compelling candidates comes first and foremost from particle physics. The dark-matter problem is now a pressing issue in both cosmology and particle physics, and the detection of particle dark matter would provide evidence for new physics.'' The compelling candidates are: a very light axion ( 10[sup [minus]6] eV--10[sup [minus]4] eV); a light neutrino (20 eV--90 eV); and a heavy neutralino (10 GeV--2 TeV). The production of these particles in the early Universe and the prospects for their detection are also discussed. I briefly mention more exotic possibilities for the dark matter, including a nonzero cosmological constant, superheavy magnetic monopoles, and decaying neutrinos.

Turner, M.S. (Chicago Univ., IL (United States). Enrico Fermi Inst. Fermi National Accelerator Lab., Batavia, IL (United States))

1993-01-01

356

Theoretical analysis of ARC constriction  

SciTech Connect

The physics of the thermionic converter is governed by strong electrode-plasma interactions (emissions surface scattering, charge exchange) and weak interactions (diffusion, radiation) at the maximum interelectrode plasma radius. The physical processes are thus mostly convective in thin sheaths in front of the electrodes and mostly diffusive and radiative in the plasma bulk. The physical boundaries are open boundaries to particle transfer (electrons emitted or absorbed by the electrodes, all particles diffusing through some maximum plasma radius) and to convective, conductive and radiative heat transfer. In a first approximation the thermionic converter may be described by a one-dimensional classical transport theory. The two-dimensional effects may be significant as a result of the sheath sensitivity to radial plasma variations and of the strong sheath-plasma coupling. The current-voltage characteristic of the converter is thus the result of an integrated current density over the collector area for which the boundary conditions at each r determine the regime (ignited/unignited) of the local current density. A current redistribution strongly weighted at small radii (arc constriction) limits the converter performance and opens questions on constriction reduction possibilities. The questions addressed are the followng: (1) what are the main contributors to the loss of current at high voltage in the thermionic converter; and (2) is arc constriction observable theoretically and what are the conditions of its occurrence. The resulting theoretical problem is formulated and results are given. The converter electrical current is estimated directly from the electron and ion particle fluxes based on the spatial distribution of the electron/ion density n, temperatures T/sub e/, T/sub i/, electrical voltage V and on the knowledge of the transport coefficients. (WHK)

Stoenescu, M.L.; Brooks, A.W.; Smith, T.M.

1980-12-01

357

Frameworks and Tensegrities Presented to  

E-print Network

Frameworks and Tensegrities A Thesis Presented to The Division of Mathematics and Natural Sciences . . . . . . . . . . . . . . . . . . . 12 1.4 Stresses of Frameworks . . . . . . . . . . . . . . . . . . . . . . . . . . 16 2 Tensegrity Frameworks . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 2.1 Tensegrities

Perkinson, David

358

The Pre-Main-Sequence Star RU Lupi: An Extreme T Tauri star  

NASA Astrophysics Data System (ADS)

In this work I will try to give the most general complete view, comparatively with the conciseness, on RU Lupi, which is an Extreme Classical T Tauri star. T Tauri stars (TTSs) form a class of low luminosity stars which are going to the Main Sequence. They are young contracting objects that are in a particular Pre-Main-Sequence (PMS) evolutionary phase. The study of the Pre-Main-Sequence Stars (PMSSs) can provide crucial information on stellar evolution and formation of planetary systems, and therefore also indirect information on the processes occurred in the primeval solar system. For this reason, firstly I will briefly comment a sort of classification of stars in PMS phases (Section 2); then I will emphasize the main characteristics of TTSs and the current theories (Section 3). The up-to-date observational properties of RU Lupi (Section 4) and a discussion on their explanation within the framework of theories (Section 5) will allow me to draw the conclusions (Section 6) and to argue the most convenient line of investigation (Section 7) both experimental and theoretical for a better understanding of the underlying physics of these systems. Finally (Section 8), I will comment in general on the methodology of investigation of highly variable cosmic sources. An original result has been obtained in this work: the flare-like events (FLEs) of RU Lupi, occurring in all wavelength regions, are periodic with aP FLE=27.686±0.002 days. This periodicity could be the rotational period of the star.

Giovannelli, Franco

1994-07-01

359

Overview: Main Fundamentals for Steganography  

E-print Network

The rapid development of multimedia and internet allows for wide distribution of digital media data. It becomes much easier to edit, modify and duplicate digital information .Besides that, digital documents are also easy to copy and distribute, therefore it will be faced by many threats. It is a big security and privacy issue, it become necessary to find appropriate protection because of the significance, accuracy and sensitivity of the information. Steganography considers one of the techniques which used to protect the important information. The main goals for this paper, to recognize the researchers for the main fundamentals of steganography. In this paper provides a general overview of the following subject areas: Steganography types, General Steganography system, Characterization of Steganography Systems and Classification of Steganography Techniques.

AL-Ani, Zaidoon Kh; Zaidan, B B; Alanazi, Hamdan O

2010-01-01

360

A Face Annotation Framework with Partial Clustering and Interactive Labeling  

Microsoft Academic Search

Face annotation technology is important for a photo management system. In this paper, we propose a novel interactive face annotation framework combining unsuper- vised and interactive learning. There are two main con- tributions in our framework. In the unsupervised stage, a partial clustering algorithm is proposed to find the most ev- ident clusters instead of grouping all instances into clusters,

Yuandong Tian; Wei Liu; Rong Xiao; Fang Wen; Xiaoou Tang

2007-01-01

361

Heavy hydrocarbon main injector technology  

NASA Technical Reports Server (NTRS)

One of the key components of the Advanced Launch System (ALS) is a large liquid rocket, booster engine. To keep the overall vehicle size and cost down, this engine will probably use liquid oxygen (LOX) and a heavy hydrocarbon, such as RP-1, as propellants and operate at relatively high chamber pressures to increase overall performance. A technology program (Heavy Hydrocarbon Main Injector Technology) is being studied. The main objective of this effort is to develop a logic plan and supporting experimental data base to reduce the risk of developing a large scale (approximately 750,000 lb thrust), high performance main injector system. The overall approach and program plan, from initial analyses to large scale, two dimensional combustor design and test, and the current status of the program are discussed. Progress includes performance and stability analyses, cold flow tests of injector model, design and fabrication of subscale injectors and calorimeter combustors for performance, heat transfer, and dynamic stability tests, and preparation of hot fire test plans. Related, current, high pressure, LOX/RP-1 injector technology efforts are also briefly discussed.

Fisher, S. C.; Arbit, H. A.

1988-01-01

362

Theoretical Challenges for Distance Education in the 21st Century: A Shift from Structural to Trans actional Issues  

Microsoft Academic Search

The premise of this article is that theoretical frameworks and models are essential to the long-term credibility and viability of a eld of practice. In order to assess the theoretical challenges facing the eld of distance education, the signicant theoretical contributions to distance education in the last century are briey reviewed. This review of distance educa- tion as a eld

Randy Garrison

363

Theoretical Particle Astrophysics  

SciTech Connect

Abstract: Theoretical Particle Astrophysics The research carried out under this grant encompassed work on the early Universe, dark matter, and dark energy. We developed CMB probes for primordial baryon inhomogeneities, primordial non-Gaussianity, cosmic birefringence, gravitational lensing by density perturbations and gravitational waves, and departures from statistical isotropy. We studied the detectability of wiggles in the inflation potential in string-inspired inflation models. We studied novel dark-matter candidates and their phenomenology. This work helped advance the DoE's Cosmic Frontier (and also Energy and Intensity Frontiers) by finding synergies between a variety of different experimental efforts, by developing new searches, science targets, and analyses for existing/forthcoming experiments, and by generating ideas for new next-generation experiments.

Kamionkowski, Marc

2013-08-07

364

Theoretical Leonid entry modeling  

SciTech Connect

In this work we present a model originally developed by ReVelle (1979, 1993) that has been applied to model large Leonid bolides with a few relatively minor modifications and one major modification which allows for catastrophic 'pancake: fragmentation processes as described below. The minor modifications include allowing the energy of ablation per unit mass for vaporization, Qvap, to be a free variable that is adjusted until agreement is obtained between the theoretical model and the statistically expected ablation coefficient for the Leonids (Group IIIB type bolide). It was found that the Qvap had to be reduced by a factor of about five times compared to the accepted value of Qvap for cometary materials. Alternative ways of achieving this degree of agreement between theory and observations are also suggested as well. In a separate paper we apply this model to a specific Leonid bolide during the 1998 storm period.

ReVelle, D. O. (Douglas O.)

2001-01-01

365

Further evidence on the validity of the theoretical models underlying the Baldrige criteria  

Microsoft Academic Search

The Baldrige framework has emerged as both a guide for quality management and the model upon which numerous state and international quality awards are based. It was introduced in 1988 as the foundation for the Malcolm Baldrige National Quality Award. The framework was significantly revised in 1992 and 1997. In order to test the validity of the theoretical model underlying

Barbara B. Flynn; Brooke Saladin

2001-01-01

366

General Aviation Data Framework  

NASA Technical Reports Server (NTRS)

The Flight Research Services Directorate at the NASA Langley Research Center (LaRC) provides development and operations services associated with three general aviation (GA) aircraft used for research experiments. The GA aircraft includes a Cessna 206X Stationair, a Lancair Colombia 300X, and a Cirrus SR22X. Since 2004, the GA Data Framework software was designed and implemented to gather data from a varying set of hardware and software sources as well as enable transfer of the data to other computers or devices. The key requirements for the GA Data Framework software include platform independence, the ability to reuse the framework for different projects without changing the framework code, graphics display capabilities, and the ability to vary the interfaces and their performance. Data received from the various devices is stored in shared memory. This paper concentrates on the object oriented software design patterns within the General Aviation Data Framework, and how they enable the construction of project specific software without changing the base classes. The issues of platform independence and multi-threading which enable interfaces to run at different frame rates are also discussed in this paper.

Blount, Elaine M.; Chung, Victoria I.

2006-01-01

367

Mount Apatite Park, Auburn, Maine  

NSDL National Science Digital Library

This guide discusses the geology, mineralogy, and mineral collecting opportunities of the Mount Apatite quarries at Auburn, Maine. Topics include the history and occurrence of the granite pegmatites, which contain collectible specimens of apatite, tourmaline, lepidolite, and other minerals; the history of glaciation in the area; and the history of the mining industry in Auburn, an important producer of commercial feldspar in the early 1900s. There is also information for mineral collectors, including permission and access, directions, and information on the exposures and how to extract specimens from them. References and links to additonal information are included.

368

Bald Mountain, Washington Plantation, Maine  

NSDL National Science Digital Library

This guide provides information on the geology of Bald Mountain, an outstanding example of an unvegetated mountain summit in western Maine. Topics include the petrology of the metamorphic rocks exposed on the mountain (layered quartzite and schist), which preserve evidence of their sedimentary origin (graded bedding, cross-bedding). There is also information on the glacial history of the area, as indicated by the presence of glacial striations and erratics. For visitors, there is information on permission and access, directions, sampling information, and activities. References are included.

369

The Internet and the European Parliament elections: Theoretical perspectives, empirical investigations and proposals for research  

Microsoft Academic Search

This article reviews the existing literature on the study of on-line aspects of elections along three well-rehearsed theoretical frameworks: equalisation vs. normalisation, information vs. engagement, and mobilisation vs. reinforcement. It then examines the contribution of this volume to the field, first by direct reference to existing literature, then more generally, touching upon the notion of the 'comparative' - theoretical, geographical

Wainer Lusoli

2005-01-01

370

Some New Theoretical Issues in Systems Thinking Relevant for Modelling Corporate Learning  

ERIC Educational Resources Information Center

Purpose: The purpose of this paper is to describe fundamental concepts and theoretical challenges with regard to systems, and to build on these in proposing new theoretical frameworks relevant to learning, for example in so-called learning organizations. Design/methodology/approach: The paper focuses on some crucial fundamental aspects introduced…

Minati, Gianfranco

2007-01-01

371

Multimedia content description framework  

NASA Technical Reports Server (NTRS)

A framework is provided for describing multimedia content and a system in which a plurality of multimedia storage devices employing the content description methods of the present invention can interoperate. In accordance with one form of the present invention, the content description framework is a description scheme (DS) for describing streams or aggregations of multimedia objects, which may comprise audio, images, video, text, time series, and various other modalities. This description scheme can accommodate an essentially limitless number of descriptors in terms of features, semantics or metadata, and facilitate content-based search, index, and retrieval, among other capabilities, for both streamed or aggregated multimedia objects.

Bergman, Lawrence David (Inventor); Kim, Michelle Yoonk Yung (Inventor); Li, Chung-Sheng (Inventor); Mohan, Rakesh (Inventor); Smith, John Richard (Inventor)

2003-01-01

372

Formal specification of Catalysis frameworks  

Microsoft Academic Search

Frameworks are increasingly recognised as very useful components in the emerging paradigm of component-based software development (CBD). They are widely accepted as better units of reuse than objects. The CBD methodol- ogy Catalysis, for instance, uses frameworks. However, at present, Catalysis frameworks are described only in- formally, which means we cannot reason formally about frameworks, in particular their composition, and

Juliana Küster Filipe; Kung-kiu Lau; Mario Ornaghi; Kenji Taguchi; Hirokazu Yatsu; Alan Wills

2000-01-01

373

Space shuttle main engine controller  

NASA Technical Reports Server (NTRS)

A technical description of the space shuttle main engine controller, which provides engine checkout prior to launch, engine control and monitoring during launch, and engine safety and monitoring in orbit, is presented. Each of the major controller subassemblies, the central processing unit, the computer interface electronics, the input electronics, the output electronics, and the power supplies are described and discussed in detail along with engine and orbiter interfaces and operational requirements. The controller represents a unique application of digital concepts, techniques, and technology in monitoring, managing, and controlling a high performance rocket engine propulsion system. The operational requirements placed on the controller, the extremely harsh operating environment to which it is exposed, and the reliability demanded, result in the most complex and rugged digital system ever designed, fabricated, and flown.

Mattox, R. M.; White, J. B.

1981-01-01

374

The Main Aeromonas Pathogenic Factors  

PubMed Central

The members of the Aeromonas genus are ubiquitous, water-borne bacteria. They have been isolated from marine waters, rivers, lakes, swamps, sediments, chlorine water, water distribution systems, drinking water and residual waters; different types of food, such as meat, fish, seafood, vegetables, and processed foods. Aeromonas strains are predominantly pathogenic to poikilothermic animals, and the mesophilic strains are emerging as important pathogens in humans, causing a variety of extraintestinal and systemic infections as well as gastrointestinal infections. The most commonly described disease caused by Aeromonas is the gastroenteritis; however, no adequate animal model is available to reproduce this illness caused by Aeromonas. The main pathogenic factors associated with Aeromonas are: surface polysaccharides (capsule, lipopolysaccharide, and glucan), S-layers, iron-binding systems, exotoxins and extracellular enzymes, secretion systems, fimbriae and other nonfilamentous adhesins, motility and flagella. PMID:23724321

Tomas, J. M.

2012-01-01

375

75 FR 27863 - Savings Bank of Maine, MHC and Savings Bank of Maine, Gardiner, Maine; Approval of Conversion...  

Federal Register 2010, 2011, 2012, 2013

...AC-38: OTS Nos. 06947 and H 4709] Savings Bank of Maine, MHC and Savings Bank of Maine, Gardiner, Maine; Approval of Conversion...Supervision approved the application of Savings Bank of Maine, MHC and Savings Bank of Maine, Gardiner, Maine, to convert...

2010-05-18

376

Overarching framework for data-based modelling  

NASA Astrophysics Data System (ADS)

One of the main modelling paradigms for complex physical systems are networks. When estimating the network structure from measured signals, typically several assumptions such as stationarity are made in the estimation process. Violating these assumptions renders standard analysis techniques fruitless. We here propose a framework to estimate the network structure from measurements of arbitrary non-linear, non-stationary, stochastic processes. To this end, we propose a rigorous mathematical theory that underlies this framework. Based on this theory, we present a highly efficient algorithm and the corresponding statistics that are immediately sensibly applicable to measured signals. We demonstrate its performance in a simulation study. In experiments of transitions between vigilance stages in rodents, we infer small network structures with complex, time-dependent interactions; this suggests biomarkers for such transitions, the key to understand and diagnose numerous diseases such as dementia. We argue that the suggested framework combines features that other approaches followed so far lack.

Schelter, Björn; Mader, Malenka; Mader, Wolfgang; Sommerlade, Linda; Platt, Bettina; Lai, Ying-Cheng; Grebogi, Celso; Thiel, Marco

2014-02-01

377

Anion separation with metal-organic frameworks  

SciTech Connect

The application of metal-organic frameworks (MOFs) to anion separations with a special emphasis on anion selectivity is reviewed. The coordination frameworks are classified on the basis of the main interactions to the included anion, from weak and non-specific van der Waals forces to more specific interactions such as coordination to Lewis acid metal centers or hydrogen bonding. The importance of anion solvation phenomena to the observed anion selectivities is highlighted, and strategies for reversing the Hofmeister bias that favors large, less hydrophilic anions, and for obtaining peak selectivities based on shape recognition are delineated. Functionalization of the anion-binding sites in MOFs with strong and directional hydrogen-bonding groups that are complementary to the included anion, combined with organizational rigidity of the coordination framework, appears to be the most promising approach for achieving non-Hofmeister selectivity.

Custelcean, Radu [ORNL; Moyer, Bruce A [ORNL

2007-01-01

378

Framework for Conceptual Change  

ERIC Educational Resources Information Center

Students often enter introductory courses lacking a consistent conceptual framework about natural sciences, and after traditional instruction, many experience little change in conceptual understanding. This article analyzes the nature and origin of misconceptions and discusses how they are formed and where they come from. It explains why it is so…

Zirbel, Esther L.

2004-01-01

379

Interacting Frameworks in Catalysis  

Microsoft Academic Search

In current OO Design, most of the existing (semi-formal) methods use classes or objects as the basic unit of design. However, it is increasingly recognised that classes are not the best focus for design. Typical design artefacts are about groups of objects and the way they interact. In theCatal- ysis project, we use the term frameworks for descriptions of groups

Kung-kiu Lau; Shaoying Liu; Mario Ornaghi; Alan Wills

1998-01-01

380

Qualifications Frameworks in Australia  

Microsoft Academic Search

Australian education and training has been shaped by federalism and the nation's history as a collection of city-formed states. Institutional and sectoral separation and autonomy have been powerful themes. The Australian Qualifications Framework (AQF) is a weak model for achieving the objective of seamlessness in education and training pathways. Yet it has a rigid and semi-regulatory role within the Vocational

Jack Keating

2003-01-01

381

Developing a Conceptual Framework.  

ERIC Educational Resources Information Center

As a screening tool for curriculum priorities, a pattern of curriculum design and redevelopment for the associate degree technical nursing program was explored. Curriculum developers examined three components: student, setting, and subject. The evolved conceptual framework, based on Orem's self-care theory, of a continuum of nursing assistance is…

Fenner, Kathleen

1979-01-01

382

Framework of product experience  

Microsoft Academic Search

In this paper, we introduce a general framework for product experience that applies to all affective responses that can be experienced in human-product interaction. Three distinct components or levels of product experiences are discussed: aesthetic experience, experience of meaning, and emotional experience. All three components are distinguished in having their own lawful underlying process. The aesthetic level involves a product’s

P. Desmet; P. Hekkert

2007-01-01

383

The STAR offline framework*  

NASA Astrophysics Data System (ADS)

The Solenoidal Tracker At RHIC (STAR) is a large acceptance collider detector which started data taking at Brookhaven National Laboratory in summer 2000. STAR has developed a software framework for simulation, reconstruction and analysis in offline production, interactive physics analysis, and online monitoring. It is well matched both to STAR's present status of transitioning from a Fortran/C++ base to a fully object oriented (OO) base, and to the emerging OO base. This paper presents the results of two years of effort developing a modular C++ framework based on the ROOT package. The framework encompasses both wrapped Fortran components (legacy simulation and reconstruction code) used via IDL-defined data structures, and fully OO components (all physics analysis code) served by a recently developed object model for event data. The framework supports chronologically chained components, which can themselves be composite sub-chains, with components ("makers") managing "data sets" they have created and are responsible for. Makers and data sets inherit from the TDataSet class which supports their organization into hierarchical structures for management. TDataSet also centralizes almost all system tasks such as data set navigation, I/O, database access, and inter-component communication. This paper will present an overview of this system, now deployed and well exercised in production environments with 10 TBytes real and 3 TBytes simulated data, and in an active physics analysis development program.

Fine, V.; Fisyak, Y.; Perevoztchikov, V.; Wenaus, T.

2001-10-01

384

A framework for quantifying complexity and understanding its sources : application to tow large-scale systems  

E-print Network

The motivation for this work is to quantify the complexity of complex systems and to understand its sources. To study complexity, we develop a theoretical framework where the complex system of interest is embedded in a ...

Martin, Pierre-Alain J. Y

2004-01-01

385

Reflection Amplifiers in Online Courses: A Classification Framework  

ERIC Educational Resources Information Center

This paper provides a theoretical framework for "reflection amplifiers" that are used in online courses. Such reflection amplifiers are intervention techniques that aim at provoking reflective practices in learning, in order to enhance the quality and effectiveness of learning and promote meta-cognition. A literature survey identified a sample of…

Verpoorten, Dominique; Westera, Wim; Specht, Marcus

2011-01-01

386

A Unified Framework for Monetary Theory and Policy Analysis.  

ERIC Educational Resources Information Center

Search-theoretic models of monetary exchange are based on explicit descriptions of the frictions that make money essential. However, tractable versions of these models typically make strong assumptions that render them ill suited for monetary policy analysis. We propose a new framework, based on explicit micro foundations, within which macro…

Lagos, Ricardo; Wright, Randall

2005-01-01

387

Frameworks: Putting Design Patterns into Perspective Henrik Brbak Christensen  

E-print Network

Frameworks: Putting Design Patterns into Perspective Henrik Bærbak Christensen Department, and realized over the last decade. As such, teaching both the underlying ideas of design patterns as well as providing the students with theoret- ical and practical experience with a range of the most often used

Christensen, Henrik Bærbak

388

School Violence Assessment: A Conceptual Framework, Instruments, and Methods  

ERIC Educational Resources Information Center

This article outlines a philosophical and theoretical framework for conducting school violence assessments at the local level. The authors advocate that assessments employ a strong conceptual foundation based on social work values. These values include the active measurement of ecological factors inside and outside the school that reflect the…

Benbenishty, Rami; Astor, Ron Avi; Estrada, Joey Nunez

2008-01-01

389

A framework for the unification of the behavioral sciences  

Microsoft Academic Search

The various behavioral disciplines model human behavior in distinct and incompatible ways. Yet, recent theoretical and empirical developments have created the conditions for rendering coherent the areas of overlap of the various behavioral disciplines, as outlined in this paper. The analytical tools deployed in this task incorporate core principles from several behavioral disciplines. The proposed framework recognizes evolutionary theory, covering

Herbert Gintis

2007-01-01

390

Students' Science Process Skills within a Cognitive Domain Framework  

ERIC Educational Resources Information Center

The purpose of this study was to investigate Turkish primary students' scientific process skills under the theoretical framework of cognitive domain. The sample set consisted of 306 sixth and seventh grade students from public, private, and bussed schools. The Turkish Integrated Process Skill Test was used to measure scientific process skills, and…

Ozgelen, Sinan

2012-01-01

391

A Semiotic Framework for Linking Cultural Practice and Classroom Mathematics.  

ERIC Educational Resources Information Center

With the increasing recognition that connections are an important component in the pedagogy of school mathematics (National Council of Teachers of Mathematics, 1989), there is a need for a theoretical framework that addresses the ways in which the real experiences and cultural practices of students may be connected with mathematics classroom…

Presmeg, Norma C.

392

A framework for implementing TQM in higher education programs  

Microsoft Academic Search

Purpose – This paper aims to provide a TQM framework that stresses continuous improvements in teaching as a plausible means of TQM implementation in higher education programs. Design\\/methodology\\/approach – The literature survey of the TQM philosophies and the comparative analysis of TQM adoption in industry versus higher education provide the theoretical and practical background for this work. The analysis of

Sitalakshmi Venkatraman

2007-01-01

393

A framework for comparison of process in algorithmic music systems  

E-print Network

theoretical constructs that are explicit enough to generate music (Loy and Abbott 1985; Cope 1991); inspired by generative grammars in language and music, where generative instead refers to mathematical recursion (ChomskyA framework for comparison of process in algorithmic music systems Rene Wooller, Andrew R. Brown

Miranda, Eduardo Reck

394

Construct Definition Using Cognitively Based Evidence: A Framework for Practice  

ERIC Educational Resources Information Center

In this article, we highlight the need for a precisely defined construct in score-based validation and discuss the contribution of cognitive theories to accurately and comprehensively defining the construct. We propose a framework for integrating cognitively based theoretical and empirical evidence to specify and evaluate the construct. We apply…

Ketterlin-Geller, Leanne R.; Yovanoff, Paul; Jung, EunJu; Liu, Kimy; Geller, Josh

2013-01-01

395

A Framework for Mathematical Thinking: The Case of Linear Algebra  

ERIC Educational Resources Information Center

Linear algebra is one of the unavoidable advanced courses that many mathematics students encounter at university level. The research reported here was part of the first author's recent PhD study, where she created and applied a theoretical framework combining the strengths of two major mathematics education theories in order to investigate the…

Stewart, Sepideh; Thomas, Michael O. J.

2009-01-01

396

Arts Integration Frameworks, Research & Practice. A Literature Review  

ERIC Educational Resources Information Center

This literature review is an essential resource for anyone involved in the research, theories, or methods and practices of arts integration. It covers what has been written between 1995 and 2007 in the U.S. and abroad and includes an historical overview, definitions and theoretical frameworks for arts integration, research and evaluation studies…

Burnaford, Gail

2007-01-01

397

Board Governance of Independent Schools: A Framework for Investigation  

ERIC Educational Resources Information Center

Purpose: This paper develops a theoretical framework to guide future inquiry into board governance of independent schools. Design/methodology/approach: The authors' approach is to integrate literatures related to corporate and educational boards, motivation, leadership and group processes that are appropriate for conceptualizing independent school…

McCormick, John; Barnett, Kerry; Alavi, Seyyed Babak; Newcombe, Geoffrey

2006-01-01

398

TANGO: A FRAMEWORK AND SYSTEM FOR ALGORITHM ANIMATION  

Microsoft Academic Search

Algorithm animation is the process of abstracting the data, operations, and semantics of computer programs, and then creating animated graphical views of those abstractions. Although a handful of algorithm animation systems have been developed in recent years, relatively little work has been done on the theoretical foundations of such systems. In this work we develop a conceptual framework with formal

John T. Stasko

1990-01-01

399

Identity Education: A Conceptual Framework for Educational Researchers and Practitioners  

Microsoft Academic Search

This article presents the concept of identity education (IdEd) referring to the purposeful involvement of educators with students’ identity-related processes or contents. We discuss why educators may consider identity important to the realization of educational goals and choose to target aspects of students’ identity in their pedagogical practice. We offer a broad theoretical framework that organizes and focuses the extensive

ELLI P. SCHACHTER; YISRAEL RICH

2011-01-01

400

A framework for understanding Latent Semantic Indexing (LSI) performance  

Microsoft Academic Search

In this paper we present a theoretical model for understanding the performance of Latent Semantic Indexing (LSI) search and retrieval applications. Many models for understanding LSI have been proposed. Ours is the rst to study the values produced by LSI in the term by dimension vectors. The framework presented here is based on term co-occurrence data. We show a strong

April Kontostathis; William M. Pottenger

2006-01-01

401

Main memory unit. [hybrid computers  

NASA Technical Reports Server (NTRS)

The development of a main memory unit (MMU) for the space ultrareliable module computer (SUMC) model HTC is discussed. The design, fabrication, and test of basic memory modules (BMM) which were to be used in the design and construction of the MMU are described. The BMM was designed from state-of-the-art technologies which included large scale integration devices mounted and interconnected on a substrate to form a functional module to be utilized in the MMU development. A SUMC memory system design study is discussed which addressed itself to the BMM design and analysis to be conducted to determine the most efficient organization of the BMM in order to establish such modularity features as: word length expandability without redesign, high reliability, and fault tolerance. One MMU was designed, fabricated, tested, and delivered which will be electrical and mechanically compatible with the hybrid technology computer (HTC) model of the SUMC family of computers. The MMU will contain a storage capacity of 8196 36 bit words which includes a parity bit for each 8 bit byte of data.

1975-01-01

402

Characterizing behavioural 'characters': an evolutionary framework.  

PubMed

Biologists often study phenotypic evolution assuming that phenotypes consist of a set of quasi-independent units that have been shaped by selection to accomplish a particular function. In the evolutionary literature, such quasi-independent functional units are called 'evolutionary characters', and a framework based on evolutionary principles has been developed to characterize them. This framework mainly focuses on 'fixed' characters, i.e. those that vary exclusively between individuals. In this paper, we introduce multi-level variation and thereby expand the framework to labile characters, focusing on behaviour as a worked example. We first propose a concept of 'behavioural characters' based on the original evolutionary character concept. We then detail how integration of variation between individuals (cf. 'personality') and within individuals (cf. 'individual plasticity') into the framework gives rise to a whole suite of novel testable predictions about the evolutionary character concept. We further propose a corresponding statistical methodology to test whether observed behaviours should be considered expressions of a hypothesized evolutionary character. We illustrate the application of our framework by characterizing the behavioural character 'aggressiveness' in wild great tits, Parus major. PMID:24335984

Araya-Ajoy, Yimen G; Dingemanse, Niels J

2014-02-01

403

A Framework for Empirical Galaxy Phenomenology: The Scatter in Galaxy Ages and Stellar Metallicities  

E-print Network

We develop a theoretical framework that extracts a deeper understanding of galaxy formation from empirically-derived relations among galaxy properties by extending the main-sequence integration method for computing galaxy star formation histories. We properly account for scatter in the stellar mass-star formation rate relation and the evolving fraction of passive systems and find that the latter effect is almost solely responsible for the age distributions among $z\\sim0$ galaxies with stellar masses above $\\sim 10^{10}\\,{\\rm M_{\\odot}}$. However, while we qualitatively agree with the observed median stellar metallicity as a function of stellar mass, we attribute our inability to reproduce the distribution in detail largely to a combination of imperfect gas-phase metallicity and $\\alpha$/Fe ratio calibrations. Our formalism will benefit from new observational constraints and, in turn, improve interpretations of future data by providing self-consistent star formation histories for population synthesis modeling.

Muñoz, Joseph A

2014-01-01

404

Theoretical research on surface bonding and structure  

SciTech Connect

A theoretical framework that directly relates surface spectroscopy and bonding energy has contributed significantly to a fundamental understanding of surface bonding - important in developing 1) materials for gaseous fuels supply, distribution, and utilization and 2) catalysts for producing SNG. Using the theory of inelastic scattering to relate the differential cross section for charged particle scattering and the total Coulomb energy of a bound system, and combining the results with the theorem for both bound and unbound species, researchers derived a closed expression relating differential scattering cross section, integrated over-energy, and angle to the binding energy. Preliminary results for homopolar diatomic molecules appear promising. A less direct connection of photoemission spectroscopy and bonding has also been discovered.

Schrieffer, J.R.

1982-04-01

405

Operational Framework for Nonlocality  

NASA Astrophysics Data System (ADS)

Because of the importance of entanglement for quantum information purposes, a framework has been developed for its characterization and quantification as a resource based on the following operational principle: entanglement among N parties cannot be created by local operations and classical communication, even when N-1 parties collaborate. More recently, nonlocality has been identified as another resource, alternative to entanglement and necessary for device-independent quantum information protocols. We introduce an operational framework for nonlocality based on a similar principle: nonlocality among N parties cannot be created by local operations and allowed classical communication even when N-1 parties collaborate. We then show that the standard definition of multipartite nonlocality, due to Svetlichny, is inconsistent with this operational approach: according to it, genuine tripartite nonlocality could be created by two collaborating parties. We finally discuss alternative definitions for which consistency is recovered.

Gallego, Rodrigo; Würflinger, Lars Erik; Acín, Antonio; Navascués, Miguel

2012-08-01

406

Geothermal Sustainability Assessment Framework  

NASA Astrophysics Data System (ADS)

With increasing global energy consumption, geothermal energy usage is set to increase in the future. There is potential for geothermal developments in many countries all over the world, where geothermal resources are located. Geothermal developments may result in both positive and negative environmental and socio-economic impacts. Sustainability assessment tools are useful to decision-makers in showing the progress of energy developments towards sustainability. Due to the unique issues associated with geothermal energy projects, a customized framework for assessing the sustainability of such projects is required. This presentation describes the development of a sustainability assessment framework for geothermal energy projects, using the input of international multi-stakeholder groups and internationally recognized methods.

Shortall, Ruth

2014-05-01

407

THE STAR OFFLINE FRAMEWORK.  

SciTech Connect

The Solenoidal Tracker At RHIC (STAR) is a-large acceptance collider detector, commissioned at Brookhaven National Laboratory in 1999. STAR has developed a software framework supporting simulation, reconstruction and analysis in offline production, interactive physics analysis and online monitoring environments that is well matched both to STAR's present status of transition between Fortran and C++ based software and to STAR's evolution to a fully OO software base. This paper presents the results of two years effort developing a modular C++ framework based on the ROOT package that encompasses both wrapped Fortran components (legacy simulation and reconstruction code) served by IDL-defined data structures, and fully OO components (all physics analysis code) served by a recently developed object model for event data. The framework supports chained components, which can themselves be composite subchains, with components (''makers'') managing ''data sets'' they have created and are responsible for. An St-DataSet class from which data sets and makers inherit allows the construction of hierarchical organizations of components and data, and centralizes almost all system tasks such as data set navigation, I/O, database access, and inter-component communication. This paper will present an overview of this system, now deployed and well exercised in production environments with real and simulated data, and in an active physics analysis development program.

FINE,V.; FISYAK,Y.; PEREVOZTCHIKOV,V.; WENAUS,T.

2000-02-07

408

Pubertal Timing, Depression, and Externalizing Problems: A Framework, Review, and Examination of Gender Differences  

ERIC Educational Resources Information Center

The purpose of this report is to synthesize the existing literature on pubertal timing and (a) depression and (b) externalizing behavior within a theoretical framework of risks, transitions, and psychological development during adolescence. This review first proposes a framework for considering pubertal timing and maladaptive behavior. Next, the…

Negriff, Sonya; Susman, Elizabeth J.

2011-01-01

409

Antitakeover provisions and shareholder value implications: a review and a contingency framework  

Microsoft Academic Search

This paper reviews literatures on the two competing theoretical views of the antitakeover provisions–shareholder value relationship — managerial entrenchment and shareholder interests — and offers a contingency framework to reconcile these views. This framework, based on a broader agency theory perspective and the organizational literatures on power, incorporates two key moderators: corporate board and shareholder monitoring, and draws attention to

Chamu Sundaramurthy

2000-01-01

410

Antitakeover Provisions and Shareholder Value Implications: A Review and a Contingency Framework  

Microsoft Academic Search

This paper reviews literatures on the two competing theoretical views of the antitakeover provisions–shareholder value relationship — managerial entrenchment and shareholder interests — and offers a contingency framework to reconcile these views. This framework, based on a broader agency theory perspective and the organizational literatures on power, incorporates two key moderators: corporate board and shareholder monitoring, and draws attention to

Chamu Sundaramurthy

2000-01-01

411

A Conceptual Framework for Examining Adolescent Identity, Media Influence, and Social Development  

Microsoft Academic Search

The adolescent identity, media, and sociocognitive schema (AIMSS) framework offers a theoretical understanding of adolescent consumption and cognitive processing of media entertainment. Review and integration of mass communication theory, developmental theory, and ecological theory serves as the conceptual foundation. The framework outlines linkages between media exposure and adolescent development, in particular adolescent identity formation and social competence. A key contribution

Blake Te'Neil Lloyd

2002-01-01

412

Self-Referent Constructs and Medical Sociology: In Search of an Integrative Framework  

ERIC Educational Resources Information Center

A theoretical framework centering on four classes of self-referent constructs is offered as a device for integrating the diverse areas constituting medical sociology. Guidance by this framework sensitizes the researcher to the occurrence of parallel processes in adjacent disciplines, facilitates recognition of the etiological significance of…

Kaplan, Howard B.

2007-01-01

413

Career "Mist," "Hope," and "Drift": Conceptual Framework for Understanding Career Development in Japan  

ERIC Educational Resources Information Center

Purpose: The purpose of this research is to present a new theoretical framework concerning subjective career development in Japan. The framework consists of three concepts, namely, career "drift," "mist," and "hope". Design/methodology/approach: This paper introduces these concepts, including how they were discovered, and the potential strength…

Kato, Ichiro; Suzuki, Ryuta

2006-01-01

414

A Research on the Evaluation Framework of Carbon Footprint in Large-scale Public Building  

Microsoft Academic Search

The purpose of this study is to evaluate the quantification of carbon footprint over the full life cycle of a large public building by establishing the framework of carbon footprint evaluation system. The theoretical basis of the framework is the life cycle theory, the gray system theory and the analytic hierarchy process. A quantity of real data should be collected

Li Nianping; Wei Xiaoqing; Ruan Fang; Wang Lijie

2011-01-01

415

Learning and Motivation in Multiple Contexts: The Development of a Heuristic Framework  

ERIC Educational Resources Information Center

This paper presents the development of a heuristic framework that integrates three aspects of context (perspective, content and level) from a number of established theoretical approaches. In this framework, context is viewed from different perspectives (subjective and objective), it comprises different contents (physical, social and formal) and it…

Wosnitza, Marold; Beltman, Susan

2012-01-01

416

From apples and oranges to symbolic dynamics: a framework for conciliating notions of cognitive representation  

Microsoft Academic Search

We introduce symbolic dynamics to cognitive scientists with the aim of furthering constructive debate on representation. Symbolic dynamics is a mathematical framework in which both continuous and discrete states of a system can be considered jointly. We discuss a number of theoretical implications this framework has for cognitive science, and offer some consideration of the way in which it might

Rick Dale; Michael J. Spivey

2005-01-01

417

Using the TPACK Framework to Facilitate Decision Making on Instructional Technologies  

ERIC Educational Resources Information Center

Technological pedagogical content knowledge ("TPACK") is a theoretical framework used primarily in the field of education to facilitate the integration of technology into educational endeavors. This framework can be particularly valuable to librarians, who are heavy users of technology, and can provide a structure that can help…

Sobel, Karen; Grotti, Margaret G.

2013-01-01

418

Activity Theory as a potential framework for human- computer interaction research  

Microsoft Academic Search

During the recent years the mainstream framework for HCI research — the information- processing cognitive psychology —has gained more and more criticism because of serious problems in applying it both in research and practical design. In a debate within HCI research the capability of information processing psychology has been questioned and new theoretical frameworks searched. This paper presents an overview

Kari Kuutti

1996-01-01

419

On the modelling-based framework for the instructional as- sessment of dynamic processes  

Microsoft Academic Search

In this paper we present a preliminary theoretical framework for the design and implementation of instruc- tional applications for dynamic processes. These applications can be used e.g. to support the simulator- based education. The framework is partly based on previous research on intelligent computer-aided in- struction (ICAI), intelligent tutoring systems (ITS), electronic performance support systems (EPSS), and adaptive hypermedia (AH)

Jukka Huhtamäki; Pekka Ranta; Seppo Pohjolainen

420

Characterizing Key Developmental Understandings and Pedagogically Powerful Ideas within a Statistical Knowledge for Teaching Framework  

ERIC Educational Resources Information Center

A hypothetical framework to characterize statistical knowledge for teaching (SKT) is described. Empirical grounding for the framework is provided by artifacts from an undergraduate course for prospective teachers that concentrated on the development of SKT. The theoretical notion of "key developmental understanding" (KDU) is used to identify…

Groth, Randall E.

2013-01-01

421

A Framework for Developing Ecosystem-Specific Nutrient Criteria: Integrating Biological Thresholds with Predictive Modeling  

Microsoft Academic Search

We present a novel ecosystem-specific framework for developing nutrient criteria from biological thresholds and predictive modeling (BTPM) and an application of this framework to lakes in Michigan, U.S. The four main components for the BTPM framework are: (1) to predict each ecosystem's 'expected nutrient concentration' in the absence of human effects using a predictive model, (2) to identify important biological

Patricia A. Soranno; Kendra Spence Cheruvelil; R. Jan Stevenson; Scott L. Rollins; Sarah W. Holden; Sylvia Heaton; Eric Torng

2008-01-01

422

The European Network of Excellence CRUISE Application Framework and Network Architecture for Wireless Sensor Networks  

Microsoft Academic Search

This paper presents the main application scenarios under investigation within the network of excellence CRUISE, which is funded in the 1ST 6th framework programme. First an application scenario framework is presented being used for the design process of wireless sensor networks (WSN). Using the framework WSN applications can be compared and contrasted in terms of user, systems requirements, and object

Ken Murray; Andreas Timm-Giel; Markus Becker; Cheng Guo; Radosveta Sokullu; Dimitri Marandin

2007-01-01

423

The Research and Application of Real Time CORBA in Software Framework for Industrial Robot  

Microsoft Academic Search

It aims to develop an extensible, scalable and portable software framework providing specific solutions for train maintenance using industrial robots. The core of the framework is C++ RTCORBA, it serves as main bone for communication, scheduling and computing, C++ and Java RMI serves in client side for comprehensive management applications. It expatiates at length on the framework's design and implcmentaion

Hongjun Song; Yibin Li; Fengyu Zhou; Lei Jia

2007-01-01

424

A decision theoretic approach to time series analysis  

Microsoft Academic Search

Summary  In this article we present a solution to the problem of constructing a statistical decision theory for discrete stochastic\\u000a processes. In doing this we also develop a theoretical frame-work for combining cross-section and time-series analyses of\\u000a non-stationary random processes. Our general approach is similar to that used by Blackwell and Girschick in their book,Theory of Games and Statistical Decisions [4].

Bernt P. Stigum

1967-01-01

425

Research Regulatory Framework 21 June 2010 1 RESEARCH REGULATORY FRAMEWORK  

E-print Network

and Policies Animals, Research involving http://www.mcgill.ca/researchoffice/compliance/animal/ Conduct://www.mcgill.ca/ehs/laser/policy/ #12;Research Regulatory Framework ­ 21 June 2010 2 Occupational Health for Animal Care Activities httpResearch Regulatory Framework ­ 21 June 2010 1 RESEARCH REGULATORY FRAMEWORK The regulatory

Fabry, Frederic

426

Street justice: a theoretical paradigm  

Microsoft Academic Search

Three theoretical perspectives examine the role of justice as a means of informal social control and as a reactionary process to dynamics of social strain and subcultural demands. This theoretical analysis is then applied to concepts of justice, including retributive, distributive, restorative, and procedural. The derived street justice paradigm incorporates these various forms of justice as they are linked with

Steven Downing

2011-01-01

427

Conceptual frameworks and empirical approaches used to assess the impact of health research: an overview of reviews  

PubMed Central

Background How to assess the impact of research is of growing interest to funders, policy makers and researchers mainly to understand the value of investments and to increase accountability. Broadly speaking the term "research impact" refers to the contribution of research activities to achieve desired societal outcomes. The aim of this overview is to identify the most common approaches to research impact assessment, categories of impact and their respective indicators. Methods We systematically searched the relevant literature (PubMed, The Cochrane Library (1990-2009)) and funding agency websites. We included systematic reviews, theoretical and methodological papers, and empirical case-studies on how to evaluate research impact. We qualitatively summarised the included reports, as well the conceptual frameworks. Results We identified twenty-two reports belonging to four systematic reviews and 14 primary studies. These publications reported several theoretical frameworks and methodological approaches (bibliometrics, econometrics, ad hoc case studies). The "payback model" emerged as the most frequently used. Five broad categories of impact were identified: a) advancing knowledge, b) capacity building, c) informing decision-making, d) health benefits, e) broad socio-economic benefits. For each proposed category of impact we summarized a set of indicators whose pros and cons are presented and briefly discussed. Conclusions This overview is a comprehensive, yet descriptive, contribution to summarize the conceptual framework and taxonomy of an heterogeneous and evolving area of research. A shared and comprehensive conceptual framework does not seem to be available yet and its single components (epidemiologic, economic, and social) are often valued differently in different models. PMID:21702930

2011-01-01

428

Preparation of functionalized zeolitic frameworks  

DOEpatents

The disclosure provides zeolitic frameworks for gas separation, gas storage, catalysis and sensors. More particularly the disclosure provides zeolitic frameworks (ZIFs). The ZIF of the disclosure comprises any number of transition metals or a homogenous transition metal composition.

Yaghi, Omar M; Hayashi, Hideki; Banerjee, Rahul; Park, Kyo Sung; Wang, Bo; Cote, Adrien P

2012-11-20

429

Preparation of functionalized zeolitic frameworks  

DOEpatents

The disclosure provides zeolitic frameworks for gas separation, gas storage, catalysis and sensors. More particularly the disclosure provides zeolitic frameworks (ZIFs). The ZIF of the disclosure comprises any number of transition metals or a homogenous transition metal composition.

Yaghi, Omar M; Furukawa, Hiroyasu; Wang, Bo

2013-07-09

430

Simple theoretical models for composite rotor blades  

NASA Technical Reports Server (NTRS)

The development of theoretical rotor blade structural models for designs based upon composite construction is discussed. Care was exercised to include a member of nonclassical effects that previous experience indicated would be potentially important to account for. A model, representative of the size of a main rotor blade, is analyzed in order to assess the importance of various influences. The findings of this model study suggest that for the slenderness and closed cell construction considered, the refinements are of little importance and a classical type theory is adequate. The potential of elastic tailoring is dramatically demonstrated, so the generality of arbitrary ply layup in the cell wall is needed to exploit this opportunity.

Valisetty, R. R.; Rehfield, L. W.

1984-01-01

431

Muscle hysteresis and movement control: a theoretical study.  

PubMed

In this study we have tried to elaborate necessary theoretical approaches for the adequate analysis of the central motor commands to a mammalian muscle in the equilibrium states and during transition movements between these states. At present, the equilibrium point hypothesis has obtained a wide distribution in this field. The muscle is considered in the framework of the theory as an executive element of the reflex circuits originating in the muscle proprioceptors and being closed at the level of spinal cord and the supraspinal motor centres. The main parameter defining the muscle state is supposed to be the threshold of the stretch reflex--the minimal length value at which muscle begins to resist to the externally applied force. We have attempted to show that the theory has an essential shortcoming because it does not take into account such important non-linearity in the muscle behaviour as hysteresis. In the framework of the equilibrium point hypothesis, the muscle behaviour within the stretch reflex system does not depend on movement direction. The stretch and unloading reflexes are supposed to have the same length tension dependencies when the muscle is stretching or contracting with a rather slow velocity. However, powerful hysteresis of the stretch reflex system requires taking into account the direction of the current movement, the after-effects of previous movement led to a principal uncertainty in the muscle steady-state. We would like to stress that any process of active muscle shortening should be controlled by dynamic components in efferent inflow. At the same time, the resulting steady-state develops by using effective hysteresis mechanism for its maintenance. The following hypothesis was proposed to explain the length clamping mechanisms in shortening transition movements. A significant decrement of the arrived efferent activity at the phase of the length fixation can evoke an internal elongation of the contractile elements within the muscle and corresponding hysteresis-like enhancement of the contractile effectiveness. Hence, instead of considering the quasi-static and dynamic components of movement commands as in the equilibrium point hypothesis, it is preferable to adopt a model of the shared coding of both the final position and movement velocity. The dynamic component of the efferent discharge seems to be required for a complete definition of the final steady-state, but maintenance of the state is closely associated with energetically advantageous hysteresis mechanisms. It was concluded that the dynamic phase of efferent activity should play an extremely important role in the central coding of the real movements produced, in particular, by contraction of agonists in the absence of antagonist activation. PMID:9466419

Kostyukov, A I

1998-03-01

432

Changing Places, Changing Spaces? Towards Understanding Teacher Education through Space-Time Frameworks  

ERIC Educational Resources Information Center

This article draws together theoretical ideas from studies of space/spatiality and the history of teacher education. These ideas form a theoretical framework through which to analyse the findings from a small-scale ethnographic study of the geographical relocations made by two university schools of education in England. Data collection instruments…

Murray, Jean

2012-01-01

433

Forum Rea?rming Social Landscape Analysis in Landscape Ecology: A Conceptual Framework  

Microsoft Academic Search

Landscape ecology continues to mature as its theoretical grounding is strengthened, its precepts and principles become increasingly accepted in other disciplines, and its broad multidisciplinary perspective becomes adopted as a framework for a growing body of empirical work. The same may be said about a social landscape analysis that draws upon its theoretical foundations in applied demography, human ecology, and

DONALD R. FIELD; PAUL R. VOSS; TRACY K. KUCZENSKI; ROGER B. HAMMER; VOLKER C. RADELOFF

434

A framework for family description  

Microsoft Academic Search

A hierarchical framework for family description is presented which consists of seven levels. These are, in order, conceptions of interaction, items of interaction, episodes of interaction, patterns of meaning, holistic formulation, type formulation, and requisite formulation. The framework is used to clarify intrinsic differences between the different schools of therapy. Implications of this framework for the epistemological debate within family

Warren Kinston; Arnon Bentovim

1990-01-01

435

A Mental Disabilities Curriculum Framework.  

ERIC Educational Resources Information Center

The framework is intended to help staff develop curricula for mildly mentally retarded students in special and regular education and assist both educators and parents in evaluating the curricula. Distinctions between a curriculum and a framework are made. The proposed framework describes essential skills, competencies, and concepts necessary for…

Gonwa, Jim; Clary, Joan Turner

436

Metal-organic frameworks.  

PubMed

Metal-organic frameworks are a recently-identified class of porous polymeric material, consisting of metal ions linked together by organic bridging ligands, and are a new development on the interface between molecular coordination chemistry and materials science. A range of novel structures has been prepared which feature amongst the largest pores known for crystalline compounds, very high sorption capacities and complex sorption behaviour not seen in aluminosilicate zeolites. The development of synthetic approaches to these materials and investigations of their properties are reviewed. PMID:14518181

James, Stuart L

2003-09-01

437

Framework for Conceptual Change  

NASA Astrophysics Data System (ADS)

Students often enter introductory courses lacking a consistent conceptual framework about natural sciences, and after traditional instruction, many experience little change in conceptual understanding. This article analyzes the nature and origin of misconceptions and discusses how they are formed and where they come from. It explains why it is so difficult to change students' concepts. This article also reviews Posner et al.'s (1982) conceptual change model and elaborates how and under what conditions it can be employed to modify students' preexisting concepts. Various challenges of that conceptual change model are discussed. How to teach to provoke conceptual change is discussed in a further paper.

Zirbel, Esther L.

438

A hybrid systems framework for cellular processes.  

PubMed

With the availability of technologies that allow us to obtain stimulus-response time series data for modeling and system identification, there is going to be an increasing need for conceptual frameworks in which to formulate and test hypotheses about intra- and inter-cellular dynamics, in general and not just dependent on a particular cell line, cell type, organism, or technology. While the semantics can be quite different, biologists and systems scientists use in many cases a similar language (notion of feedback, regulation, etc.). A more abstract system-theoretic framework for signals, systems, and control could provide the biologist with an interface between the domains. Apart from recent examples to identify functional elements and describing them in engineering terms, there have been various more abstract developments to describe dynamics at the cell level in the past. This includes Rosen's (M,R)-systems. This paper presents an abstract and general compact mathematical framework of intracellular dynamics, regulation and regime switching inspired by (M,R)-theory and based on hybrid automata. PMID:15888342

Cho, Kwang-Hyun; Johansson, Karl Henrik; Wolkenhauer, Olaf

2005-06-01

439

An entropic framework for modeling economies  

NASA Astrophysics Data System (ADS)

We develop an information-theoretic framework for economic modeling. This framework is based on principles of entropic inference that are designed for reasoning on the basis of incomplete information. We take the point of view of an external observer who has access to limited information about broad macroscopic economic features. We view this framework as complementary to more traditional methods. The economy is modeled as a collection of agents about whom we make no assumptions of rationality (in the sense of maximizing utility or profit). States of statistical equilibrium are introduced as those macrostates that maximize entropy subject to the relevant information codified into constraints. The basic assumption is that this information refers to supply and demand and is expressed in the form of the expected values of certain quantities (such as inputs, resources, goods, production functions, utility functions and budgets). The notion of economic entropy is introduced. It provides a measure of the uniformity of the distribution of goods and resources. It captures both the welfare state of the economy as well as the characteristics of the market (say, monopolistic, concentrated or competitive). Prices, which turn out to be the Lagrange multipliers, are endogenously generated by the economy. Further studies include the equilibrium between two economies and the conditions for stability. As an example, the case of the nonlinear economy that arises from linear production and utility functions is treated in some detail.

Caticha, Ariel; Golan, Amos

2014-08-01

440

Spatio-temporal Granger causality: a new framework.  

PubMed

That physiological oscillations of various frequencies are present in fMRI signals is the rule, not the exception. Herein, we propose a novel theoretical framework, spatio-temporal Granger causality, which allows us to more reliably and precisely estimate the Granger causality from experimental datasets possessing time-varying properties caused by physiological oscillations. Within this framework, Granger causality is redefined as a global index measuring the directed information flow between two time series with time-varying properties. Both theoretical analyses and numerical examples demonstrate that Granger causality is a monotonically increasing function of the temporal resolution used in the estimation. This is consistent with the general principle of coarse graining, which causes information loss by smoothing out very fine-scale details in time and space. Our results confirm that the Granger causality at the finer spatio-temporal scales considerably outperforms the traditional approach in terms of an improved consistency between two resting-state scans of the same subject. To optimally estimate the Granger causality, the proposed theoretical framework is implemented through a combination of several approaches, such as dividing the optimal time window and estimating the parameters at the fine temporal and spatial scales. Taken together, our approach provides a novel and robust framework for estimating the Granger causality from fMRI, EEG, and other related data. PMID:23643924

Luo, Qiang; Lu, Wenlian; Cheng, Wei; Valdes-Sosa, Pedro A; Wen, Xiaotong; Ding, Mingzhou; Feng, Jianfeng

2013-10-01

441

Theoretical and experimental approaches to understand morphogen gradients  

PubMed Central

Morphogen gradients, which specify different fates for cells in a direct concentration-dependent manner, are a highly influential framework in which pattern formation processes in developmental biology can be characterized. A common analysis approach is combining experimental and theoretical strategies, thereby fostering relevant data on the dynamics and transduction of gradients. The mechanisms of morphogen transport and conversion from graded information to binary responses are some of the topics on which these combined strategies have shed light. Herein, we review these data, emphasizing, on the one hand, how theoretical approaches have been helpful and, on the other hand, how these have been combined with experimental strategies. In addition, we discuss those cases in which gradient formation and gradient interpretation at the molecular and/or cellular level may influence each other within a mutual feedback loop. To understand this interplay and the features it yields, it becomes essential to take system-level approaches that combine experimental and theoretical strategies. PMID:18364710

Ibanes, Marta; Belmonte, Juan Carlos Izpisua

2008-01-01

442

Hybrid rocket engine, theoretical model and experiment  

NASA Astrophysics Data System (ADS)

The purpose of this paper is to build a theoretical model for the hybrid rocket engine/motor and to validate it using experimental results. The work approaches the main problems of the hybrid motor: the scalability, the stability/controllability of the operating parameters and the increasing of the solid fuel regression rate. At first, we focus on theoretical models for hybrid rocket motor and compare the results with already available experimental data from various research groups. A primary computation model is presented together with results from a numerical algorithm based on a computational model. We present theoretical predictions for several commercial hybrid rocket motors, having different scales and compare them with experimental measurements of those hybrid rocket motors. Next the paper focuses on tribrid rocket motor concept, which by supplementary liquid fuel injection can improve the thrust controllability. A complementary computation model is also presented to estimate regression rate increase of solid fuel doped with oxidizer. Finally, the stability of the hybrid rocket motor is investigated using Liapunov theory. Stability coefficients obtained are dependent on burning parameters while the stability and command matrixes are identified. The paper presents thoroughly the input data of the model, which ensures the reproducibility of the numerical results by independent researchers.

Chelaru, Teodor-Viorel; Mingireanu, Florin

2011-06-01

443

Master track Theoretical Biology & Bioinformatics  

E-print Network

Master track Theoretical Biology & Bioinformatics Modeling and bioinformatics is an important Biology & Bioinformatics provides courses introducing you to the basic concepts of modeling and bioinformatics, and offers research projects in which you will study how complex biological systems function

Utrecht, Universiteit

444

Fsusy and Field Theoretical Construction  

E-print Network

Following our previous work on fractional spin symmetries (FSS) \\cite{6, 7}, we consider here the construction of field theoretical models that are invariant under the $D=2(1/3,1/3)$ supersymmetric algebra.

Sedra, M B

2009-01-01

445

Fsusy and Field Theoretical Construction  

E-print Network

Following our previous work on fractional spin symmetries (FSS) \\cite{6, 7}, we consider here the construction of field theoretical models that are invariant under the $D=2(1/3,1/3)$ supersymmetric algebra.

M. B. Sedra; J. Zerouaoui

2009-12-18

446

Age-Related Observations of Low Mass Pre-Main and Young Main Sequence Stars (Invited Review)  

E-print Network

This overview summarizes the age dating methods available for young sub-solar mass stars. Pre-main sequence age diagnostics include the Hertzsprung-Russell (HR) diagram, spectroscopic surface gravity indicators, and lithium depletion; asteroseismology is also showing recent promise. Near and beyond the zero-age main sequence, rotation period or vsini and activity (coronal and chromospheric) diagnostics along with lithium depletion serve as age proxies. Other authors in this volume present more detail in each of the aforementioned areas. Herein, I focus on pre-main sequence HR diagrams and address the questions: Do empirical young cluster isochrones match theoretical isochrones? Do isochrones predict stellar ages consistent with those derived via other independent techniques? Do the observed apparent luminosity spreads at constant effective temperature correspond to true age spreads? While definitive answers to these questions are not provided, some methods of progression are outlined.

Lynne A. Hillenbrand

2008-12-06

447

Promoting good governance through regulatory frameworks in African water utilities.  

PubMed

Most public utilities in Africa are operating at very low efficiency levels. This is mainly a result of poor governance leading to a downward spiral in terms of service to customers. Nearly in every case, studies have shown that the root cause of these problems is not necessarily lack of investment but poor choices with regard to sector policies, institutional and regulatory frameworks. The paper will seek to show the need for effective regulatory framework that promotes Good Governance of public utilities leading to their efficient performance. The paper will draw lessons from the Australian water services regulatory framework and apply it to the African water situation. The Australian regulatory framework has been instrumental in promoting Good Governance in the public utilities hence being run efficiently. It is recognised that the African Water and Sanitation Sector where most public utilities are not operating under a clearly defined regulatory framework can learn a lot from the Australian experience. PMID:16007930

Mwanza, D D

2005-01-01

448

Sensor Based Framework for Secure Multimedia Communication in VANET  

PubMed Central

Secure multimedia communication enhances the safety of passengers by providing visual pictures of accidents and danger situations. In this paper we proposed a framework for secure multimedia communication in Vehicular Ad-Hoc Networks (VANETs). Our proposed framework is mainly divided into four components: redundant information, priority assignment, malicious data verification and malicious node verification. The proposed scheme jhas been validated with the help of the NS-2 network simulator and the Evalvid tool. PMID:22163462

Rahim, Aneel; Khan, Zeeshan Shafi; Bin Muhaya, Fahad T.; Sher, Muhammad; Kim, Tai-Hoon

2010-01-01

449

The RAVE\\/VERTIGO vertex reconstruction toolkit and framework  

Microsoft Academic Search

A detector-independent toolkit for vertex reconstruction (RAVE1) is being developed, along with a standalone framework (VERTIGO2) for testing, analyzing and debugging. The core algorithms represent state-of-the-art for geometric vertex finding and fitting by both linear (Kalman filter) and robust estimation methods. Main design goals are ease of use, flexibility for embedding into existing software frameworks, extensibility, and openness. The implementation

W. Waltenberger; W. Mitaroff; F. Moser; B. Pflugfelder; H. V. Riedel

2008-01-01

450

Sensor based framework for secure multimedia communication in VANET.  

PubMed

Secure multimedia communication enhances the safety of passengers by providing visual pictures of accidents and danger situations. In this paper we proposed a framework for secure multimedia communication in Vehicular Ad-Hoc Networks (VANETs). Our proposed framework is mainly divided into four components: redundant information, priority assignment, malicious data verification and malicious node verification. The proposed scheme jhas been validated with the help of the NS-2 network simulator and the Evalvid tool. PMID:22163462

Rahim, Aneel; Khan, Zeeshan Shafi; Bin Muhaya, Fahad T; Sher, Muhammad; Kim, Tai-Hoon

2010-01-01

451

Cold-formed thin-walled framework with flexible joint  

NASA Astrophysics Data System (ADS)

The behavior of symmetrical double storey frameworks of cold-formed thin-walled plain channel members and semi-rigid connections is investigated analytically. A method of analysis, which is based on the matrix stiffness method, is developed and written into a computer program. Generalized relationships between forces and displacements at the ends of an element with semi-rigid connections are presented in a matrix form. The analysis takes account of member local buckling, connection strength and full moment-rotation behavior, axial load effects and shortening due to flexure. Using the theoretical analysis, the elastic critical load of the framework can be established.

Tan, Soon H.; Rhodes, J.

1993-05-01

452

From theory to observations and vice versa: theoretical uncertainties and observational constraints  

NASA Astrophysics Data System (ADS)

During these past decades, our knowledge of evolutionary and structural properties of stars of different mass and chemical composition is significantly improved. This result has been achieved as a consequence of our improved capability in understanding and describing the physical behaviour of matter in the different thermal regimes characteristic of the various stellar mass ranges and evolutionary stages. This notwithstanding, the current generation of stellar models is still affected by significant and, usually, not negligible uncertainties. These uncertainties are related to our poor knowledge of some physical proceses occurring in the real stars such as, for instance, some thermodynamical processes, nuclear reaction rates, as well as the efficiency of mixing processes. These drawbacks of stellar models have to be properly taken into account when comparing theory with observations in order to derive relevant information about the properties of both resolved and unresolved stellar populations. On the other hand, observations of both field and cluster stars can provide fundamental benchmarks for constraining the reliability and accuracy of the theoretical framework. In the following we review some important evolutionary and structural properties of very-low and low-mass stars, as well as the most important uncertainties affecting the stellar models for such stars. We show what are the main sources of uncertainty along the main evolutionary stages, and discuss the present level of agreement between theory and observations.

Cassisi, S.

2014-11-01

453

Rural Employment, Migration, and Economic Development: Theoretical Issues and Empirical Evidence from Africa. Africa Rural Employment Paper No. 1.  

ERIC Educational Resources Information Center

Employment problems in Africa were examined with special emphasis on rural employment and migration within the context of overall economic development. A framework was provided for analyzing rural employment in development; that framework was used to analyze empirical information from Africa; and theoretical issues were raised in analyzing rural…

Byerlee, Derek; Eicher, Carl K.

454

The health impacts of globalisation: a conceptual framework  

PubMed Central

This paper describes a conceptual framework for the health implications of globalisation. The framework is developed by first identifying the main determinants of population health and the main features of the globalisation process. The resulting conceptual model explicitly visualises that globalisation affects the institutional, economic, social-cultural and ecological determinants of population health, and that the globalisation process mainly operates at the contextual level, while influencing health through its more distal and proximal determinants. The developed framework provides valuable insights in how to organise the complexity involved in studying the health effects resulting from globalisation. It could, therefore, give a meaningful contribution to further empirical research by serving as a 'think-model' and provides a basis for the development of future scenarios on health. PMID:16078989

Huynen, Maud MTE; Martens, Pim; Hilderink, Henk BM

2005-01-01

455

ReaxFF molecular dynamics simulation of thermal stability of a Cu3(BTC)2 metal-organic framework.  

PubMed

The thermal stability of a dehydrated Cu(3)(BTC)(2) (copper(II) benzene 1,3,5-tricarboxylate) metal-organic framework was studied by molecular dynamics simulation with a ReaxFF reactive force field. The results show that Cu(3)(BTC)(2) is thermally stable up to 565 K. When the temperature increases between 600 K and 700 K, the framework starts to partially collapse. The RDF analysis shows that the long range correlations between Cu dimers disappear, indicating the loss of the main channels of Cu(3)(BTC)(2). When the temperature is above 800 K, we find the decomposition of the Cu(3)(BTC)(2) framework. CO is the major product, and we also observe the release of CO(2), O(2), 1,3,5-benzenetricarboxylate (C(6)H(3)(CO(2))(3), BTC) and glassy carbon. The Cu dimer is stable up to 1100 K, but we find the formation of new copper oxide clusters at 1100 K. These results are consistent with experimental findings, and provide valuable information for future theoretical investigations of Cu(3)(BTC)(2) and its application in adsorption, separation and catalytic processes. PMID:22796865

Huang, Liangliang; Joshi, Kaushik L; van Duin, Adri C T; Bandosz, Teresa J; Gubbins, Keith E

2012-08-28

456

Theoretical Population Biology 69 (2006) 231233 ESS theory now  

E-print Network

Theoretical Population Biology 69 (2006) 231­233 Editorial ESS theory now More than 30 years have passed since the concept of evolutionarily stable strategy (ESS) was introduced in the context of animal of the ESS concept. Even today the main idea, and the more general one, remains to look for a population

Lessard, Sabin

457

Preservation of Newspapers: Theoretical Approaches and Practical Achievements  

ERIC Educational Resources Information Center

The preservation of newspapers is the main topic of this paper. A theoretical overview of newspaper preservation is given, with an emphasis on the importance of a systematic and comprehensive approach. Efficient newspaper preservation implies understanding the meaning of preservation in general, as well as understanding specific approaches,…

Hasenay, Damir; Krtalic, Maja

2010-01-01

458

Hormonal and nonhormonal regulation of maternal behavior : A theoretical survey  

E-print Network

Hormonal and nonhormonal regulation of maternal behavior : A theoretical survey J. S. ROSENBLATT. There is a general uniformity in the hormones that regulate pregnancy among a large variety of mammals. There is also the hormonal basis for the onset of maternal behavior. In the main, however, the ovarian hormones probably play

Boyer, Edmond

459

Local Development in EuropeTheoretical Models and International Comparisons  

Microsoft Academic Search

This paper deals with territory and economic development, highlighting the active role of territory in the development process. The main aim of the paper is to draw policy lessons from theoretical analysis and international comparison. After a short analysis of the debate about the literature on local development (industrial districts, endogenous development, regional innovation systems), the paper deals with the

Gioacchino Garofoli

2002-01-01

460

Theoretical Division progress report. [October 1976January 1979  

Microsoft Academic Search

This report presents highlights of activities in the Theoretical (T) Division from October 1976-January 1979. The report is divided into three parts. Part I presents an overview of the Division: its unique function at the Los Alamos Scientific Laboratory (LASL) and within the scientific community as a whole; the organization of personnel; the main areas of research; and a survey

1979-01-01

461

Special functions and group theory in theoretical physics  

SciTech Connect

The subject of special functions, even where restricted to the narrower subject of special functions in theoretical physics, is far too broad for one to attempt any meaningfully complete survey. We attempt to review the important main themes in the subject and then show how recent advances broadened and extended these themes.

Biedenharn, L.C.; Gustafson, R.A.; Lohe, M.A.; Louck, J.D.; Milne, S.C.

1983-01-01

462

Attachment: Theoretical Development and Critique  

ERIC Educational Resources Information Center

Zeanah argues that ethological attachment theory, as outlined by John Bowlby, has provided one of the most important frameworks for understanding crucial risk and protective factors in social and emotional development. However, although attachment theory and the notion of attachment disorders have influenced such initiatives, many psychologists,…

Slater, Ruth

2007-01-01

463

40 CFR 81.320 - Maine.  

Code of Federal Regulations, 2011 CFR

...east to Dudley Street, Dudley Street south to Cedar Street, Cedar Street west to Main Street, Main Street south to Kennedy Brook, Kennedy Brook northwest crossing Presque Isle Stream to Coburn Street, Coburn Street northwest to Mechanic...

2011-07-01

464

40 CFR 81.320 - Maine.  

Code of Federal Regulations, 2012 CFR

...east to Dudley Street, Dudley Street south to Cedar Street, Cedar Street west to Main Street, Main Street south to Kennedy Brook, Kennedy Brook northwest crossing Presque Isle Stream to Coburn Street, Coburn Street northwest to Mechanic...

2012-07-01

465

Small Main-Belt Asteroid Lightcurve Survey  

NASA Technical Reports Server (NTRS)

The Small Main-Belt Asteroid Lightcurve Survey is the first to measure main-belt asteroid lightcurve properties for bodies with diameters smaller than 5 km. Attention is given to CCD lightcurves for 32 small main-belt asteroids. The objects of this sample have a mean rotational frequency which is faster than that of larger main-belt asteroids. All lightcurves were investigated for nonperiodic variations ascribable to free precession; no conclusive detection of this phenomenon has been made, however.

Binzel, Richard P.; Xu, Shui; Bus, Schelte J.; Bowell, Edward

1992-01-01

466

Theoretical Consolidation of Acoustic Dissipation  

NASA Technical Reports Server (NTRS)

In many engineering problems, the effects of dissipation can be extremely important. Dissipation can be represented by several parameters depending on the context and the models that are used. Some examples of dissipation-related parameters are damping ratio, viscosity, resistance, absorption coefficients, pressure drop, or damping rate. This Technical Memorandum (TM) describes the theoretical consolidation of the classic absorption coefficients with several other dissipation parameters including linearized resistance. The primary goal of this TM is to theoretically consolidate the linearized resistance with the absorption coefficient. As a secondary goal, other dissipation relationships are presented.

Casiano, M. J.; Zoladz, T. F.

2012-01-01

467

In Maine, Postsecondary Success Starts before College  

ERIC Educational Resources Information Center

A 2008 report from the Joint Standing Committee on Education and Culture Affairs of the Maine Legislature indicates a quarter of those who enrolled at a public university in Maine required a remedial course to catch them up to the level where they should have been when they completed high school. Regardless of how hard Maine has tried and how much…

LePage, Paul R.

2011-01-01

468

Main Entrances Free City Bus Stops  

E-print Network

647 EASBY ROAD A647 A647 25 26 27 B Main Entrances Free City Bus Stops Controlled parking areas Information B Bus Stops B Main Entrances Free City Bus Stops Controlled parking areas (permit holders only B Main Entrances Free City Bus Stops Controlled parking areas (permit holders only)P Visitor car

Magee, Derek

469

New England: 1. Cod Gulf of Maine  

E-print Network

New England: 1. Cod ­ Gulf of Maine 2. Cod ­ Georges Bank 3. Haddock ­ Gulf of Maine 4. Haddock New England/Middle Atlantic 8. Yellowtail flounder ­ Cape Cod/Gulf of Maine 9. White Hake 10. Windowpane Flounder ­ Southern New England/Middle Atlantic 11. Winter Flounder ­ Southern New England

470

New England: 1. Cod Gulf of Maine  

E-print Network

New England: 1. Cod ­ Gulf of Maine 2. Cod ­ Georges Bank 3. Yellowtail flounder ­ Southern New ­ Georges Bank 7. Winter Flounder ­ Southern New England/Middle Atlantic 8. Pollock - Gulf of Maine / Georges Bank 9. Windowpane - Gulf of Maine / Georges Bank 10. Windowpane - Southern New England / Mid

471

Executor Framework for DIRAC  

NASA Astrophysics Data System (ADS)

DIRAC framework for distributed computing has been designed as a group of collaborating components, agents and servers, with persistent database back-end. Components communicate with each other using DISET, an in-house protocol that provides Remote Procedure Call (RPC) and file transfer capabilities. This approach has provided DIRAC with a modular and stable design by enforcing stable interfaces across releases. But it made complicated to scale further with commodity hardware. To further scale DIRAC, components needed to send more queries between them. Using RPC to do so requires a lot of processing power just to handle the secure handshake required to establish the connection. DISET now provides a way to keep stable connections and send and receive queries between components. Only one handshake is required to send and receive any number of queries. Using this new communication mechanism DIRAC now provides a new type of component called Executor. Executors process any task (such as resolving the input data of a job) sent to them by a task dispatcher. This task dispatcher takes care of persisting the state of the tasks to the storage backend and distributing them among all the Executors based on the requirements of each task. In case of a high load, several Executors can be started to process the extra load and stop them once the tasks have been processed. This new approach of handling tasks in DIRAC makes Executors easy to replace and replicate, thus enabling DIRAC to further scale beyond the current approach based on polling agents.

Casajus Ramo, A.; Graciani Diaz, R.

2012-12-01

472

Finding the Onset of Convection in Main Sequence Stars  

NASA Technical Reports Server (NTRS)

The primary goal of the work performed under this grant was to locate, if possible, the onset of subphotospheric convection zones in normal main sequence stars by using the presence of emission in high temperature lines in far ultraviolet spectra from the FUSE spacecraft as a proxy for convection. The change in stellar structure represented by this boundary between radiative and convective stars has always been difficult to find by other empirical means. A search was conducted through observations of a sample of A-type stars, which were somewhat hotter and more massive than the Sun, and which were carefully chosen to bridge the theoretically expected radiative/convective boundary line along the main sequence.

Simon, Theodore

2003-01-01

473

Theoretical SNR for DPCM with predictor mismatch  

E-print Network

, and four sentence inputs. Corresponding calculations of theoretical SNRs are made using the derived equations. Results verify that the theoretical SNR equations make good predictions of actual SNR performance of DPCM. ACKNOWLEDGMENTS The author wishes... Theoretical and Experimental SNR of First-order DPCM for Sentence 1. 37 Theoretical and Experimental SNR of First-order DPCM for Sentence 2. . 38 III. Theoretical and Experimental SNR of First-order DPCM for Sentence 3. 39 IV. Theoretical and Experimental...

Purcell, David Keith

2012-06-07

474

A career in theoretical physics  

NASA Astrophysics Data System (ADS)

1. Pressure broadening in the microwave and infrared regions -- 2. Theory of ferroelectric behavior of barium titanate -- 3. Use of stochastic methods in line-broadening problems -- 4. An approximate quantum theory of the antiferromagnetic ground state -- 5. Qualitative considerations on the statistics of the phase transition in BaTi0[symbol]-type ferroelectrics -- 6. Ordering and antiferromagnetism in ferrites -- 7. Absence of diffusion in certain random lattices -- 8. New method in the theory of superconductivity -- 9. New approach to the theory of superexchange interactions -- 10. Theory of dirty superconductors -- 11. Calculation of the superconducting state parameters with retarded electron-phonon interaction -- 12. Generalized Bardeen-Cooper-Schrieffer states and the proposed low-temperature phase of liquid He[symbol] -- 13. Localized magnetic states in metals -- 14. Plasmons, gauge invariance, and mass -- 15. Hard superconductivity: theory of the motion of Abrikosov flux lines -- 16. Probable observation of the Josephson superconducting tunneling effect -- 17. Image of the phonon spectrum in the tunneling characteristic between superconductors -- 18. Exchange in magnetic insulators in Transition Metal Compounds -- 19. Superconductivity (two opinions) -- 20. Coherent matter field phenomena in superfluids in Some Recent Definitions in the Basic Sciences -- 21. Considerations on the flow of superfluid helium -- 22. Multiple-scattering theory and resonances in transition metals (with W. L. McMillan) -- 23. Infrared catastrophe in Fermi gases with local scattering potentials -- 24. The Kondo effect I. The Kondo effect II. Kondo effect III: the wilderness - mainly theoretical. Kondo effect IV: out of the wilderness -- 25. Superconductivity in the past and the future in Superconductivity -- 26. Macroscopic coherence and superfluidity in Contemporary Physics -- 27. The Fermi glass: theory and experiment -- 28. Space-time and scaling techniques in the Kondo problem in Proc. of 12th Int. Conf. on Low Temperature Physics -- 29. Anomalous low-temperature thermal properties of glasses and spin glasses -- 30. Comments on the maximum superconducting transition temperature (with M. L. Cohen). Comment on "Model for an exciton mechanism of superconductivity" (with J. C. Inkson) -- 31. Resonating valence bonds: a new kind of insulator? -- 32. Anisotropic superfluidity in [symbol]He: a possible interpretation of its stability as a spin-fluctuation effect (with W. F. Brinkman) -- 33. Conference summary in Collective Properties of Physical Systems -- 34. Asymptotically exact methods in the Kondo problem (with G. Yuval) -- 35. Many-body effects at surfaces in Elementary Excitations in Solids, Molecules and Atoms -- 36. Conductivity from charge or spin density waves (with P. A. Lee and T. M. Rice) -- 37. Uses of solid state analogies in Elementary Particle Theory in Proc. of Conf. on Gauge Theories and Modern Field Theory -- 38. Possible consequences of negative U centers in amorphous materials -- 39. Theory of spin glasses (with S. F. Edwards) -- 40. Solution of "Solvable model of a spin glass" (with D. J. Thouless and R. G. Palmer) -- 41. Phase slippage without vortex cores: vortex textures in superfluid [symbol]He (with G. Toulouse) -- 42. Scaling theory of localization: absence of quantum diffusion in two dimensions (with E. Abrahams, D. C. Licciardello and T. V. Ramakrishnan) -- 43. Some general thoughts about broken symmetry in Symmetries and Broken Symmetries in Condensed Matter Physics -- 44. The rheology of neutron stars: vortex line pinning in the crust superfluid (with M. A. Alpar, D. Pines and J. Shaham) -- 45. Localization redux -- 46. New method for scaling theory of localization. II: multi-channel theory of a "wire" and possible extension to higher dimensionality -- 47. Definition and measurement of the electrical and thermal resistances (with H.-L. Engquist) -- 48. Suggested model for prebiotic evolution: the use of chaos -- 49. Chemical pseudopotentials -- 50. Spin glass Hamiltonians: a brid

Anderson, P. W.

475

A metacommunity framework for enhancing the effectiveness of biological monitoring strategies.  

PubMed

Because of inadequate knowledge and funding, the use of biodiversity indicators is often suggested as a way to support management decisions. Consequently, many studies have analyzed the performance of certain groups as indicator taxa. However, in addition to knowing whether certain groups can adequately represent the biodiversity as a whole, we must also know whether they show similar responses to the main structuring processes affecting biodiversity. Here we present an application of the metacommunity framework for evaluating the effectiveness of biodiversity indicators. Although the metacommunity framework has contributed to a better understanding of biodiversity patterns, there is still limited discussion about its implications for conservation and biomonitoring. We evaluated the effectiveness of indicator taxa in representing spatial variation in macroinvertebrate community composition in Atlantic Forest streams, and the processes that drive this variation. We focused on analyzing whether some groups conform to environmental processes and other groups are more influenced by spatial processes, and on how this can help in deciding which indicator group or groups should be used. We showed that a relatively small subset of taxa from the metacommunity would represent 80% of the variation in community composition shown by the entire metacommunity. Moreover, this subset does not have to be composed of predetermined taxonomic groups, but rather can be defined based on random subsets. We also found that some random subsets composed of a small number of genera performed better in responding to major environmental gradients. There were also random subsets that seemed to be affected by spatial processes, which could indicate important historical processes. We were able to integrate in the same theoretical and practical framework, the selection of biodiversity surrogates, indicators of environmental conditions, and more importantly, an explicit integration of environmental and spatial processes into the selection approach. PMID:22937068

Siqueira, Tadeu; Bini, Luis M; Roque, Fabio O; Cottenie, Karl

2012-01-01

476

Theoretical Perspectives for Developmental Education.  

ERIC Educational Resources Information Center

This monograph from the University of Minnesota General College (GC) discusses theoretical perspectives on developmental education from both new and established standpoints. GC voluntarily eliminated its degree programs in order to focus on preparing under-prepared students for transfer to the university system. GC's curricular model includes a…

Lundell, Dana Britt, Ed.; Higbee, Jeanne L., Ed.

477

Theoretical Foundations of Learning Environments  

ERIC Educational Resources Information Center

"Theoretical Foundations of Learning Environments" describes the most contemporary psychological and pedagogical theories that are foundations for the conception and design of open-ended learning environments and new applications of educational technologies. In the past decade, the cognitive revolution of the 60s and 70s has been replaced or…

Jonassen, David H., Ed.; Land, Susan M., Ed.

1999-01-01

478

Introductory Training on Theoretical Spectroscopy  

E-print Network

theoretical description and analysis. The joint use of theory and computer simulation has in fact, over electron density 10h40 - 11h10 Caffeine Break 11h10 - 11h40 Green's Functions theory: description throughh30 - 15h20 Optics beamline 15h20 - 15h50 Caffeine break 15h50 - 16h40 Loss Spectroscopy beamline 16

Botti, Silvana

479

Theoretical problems of spiral galaxies  

NASA Technical Reports Server (NTRS)

Three theoretical problems concerning the large scale structure of disk galaxies in general, and the Milky Way System, in particular, were proposed to study. They are, namely, modes of spiral density waves, evolutionary change of the abundance distribution of the gas in the Milky Way System and the motions of the cloud medium behind the large scale galactic shock.

Yuan, C.

1982-01-01

480

Theoretical Physics in Cellular Biology  

E-print Network

Theoretical Physics in Cellular Biology: Some Illustrative Case Studies Living matter obeys in many areas of biology. This truism is becoming ever more relevant with the rapid growth of the ability of biological experiment to produce large amounts of quantitative data: comprehending that data surely

481

Theoretical understanding of charm decays  

SciTech Connect

A detailed description of charm decays has emerged. The various concepts involved are sketched. Although this description is quite successful in reproducing the data the chapter on heavy flavour decays is far from closed. Relevant questions like on th real strength of weak annihilation, Penguin operators, etc. are still unanswered. Important directions in future work, both on the experimental and theoretical side are identified.

Bigi, I.I.

1986-08-01

482

Ocean Dynamics Theoretical, Computational and  

E-print Network

1 23 Ocean Dynamics Theoretical, Computational and Observational Oceanography ISSN 1616-7341 Ocean Dynamics DOI 10.1007/s10236-012-0537-5 FVCOM model estimate of the location of Air France 447 Changsheng and the Woods Hole Oceanographic Institution RE- MUS autonomous underwater vehicle Operations Group who

Chen, Changsheng

483

Theoretical predictions for exotic hadrons  

NASA Astrophysics Data System (ADS)

In this contribution we discuss current theoretical expectations for the properties of light meson ``exotica'', which are meson resonances outside the qq¯ quark model. Specifically we discuss expectations for gluconic hadrons (glueballs and hybrids) and multiquark systems (molecules). Experimental candidates for these states are summarized, and the relevance of a TCF to these studies is stressed.

Barnes, T.

1996-01-01

484

Teaching Political Analysis: A Framework  

ERIC Educational Resources Information Center

A framework using concepts from systems theory, theories of power, and the garbage can model of decision-making was developed for the purpose of teaching aspiring school administrators to analyze situations using a political lens. The framework is demonstrated in an analysis of the process that led to Ohio's establishing a school facilities…

Edlefson, Carla

2010-01-01

485

Massachusetts Arts Curriculum Framework, 1999.  

ERIC Educational Resources Information Center

This curriculum framework presents a philosophy of arts education, synthesizes current research, and sets learning standards for students from kindergarten through 12th grade in the Commonwealth of Massachusetts. The curriculum framework's core concept is that experience in the creative process is essential for all learners, and that, in the arts,…

Massachusetts State Dept. of Education, Boston.

486

TRUMAN STATE UNIVERSITY'S COMMON FRAMEWORK  

E-print Network

TRUMAN STATE UNIVERSITY'S COMMON FRAMEWORK FOR CRITICAL THINKING PEDAGOGY 30 October, 2012 Pathways Critical Thinking Task Force Table of Contents Framework Narrative 1-10 Introduction and Rationale 1: Critical Thinking Rubric Template Appendix B: "Purple Paper: Critical Thinking Task Force" Exhibits Exhibit

Gering, Jon C.

487

An Uncertainty Framework for Classification  

Microsoft Academic Search

We define a generalized likelihood function based on uncertainty measures and show that maximizing such a likelihood function for different measures induces different types of classifiers. In the probabilistic framework, we obtain classifiers that optimize the cross-entropy function. In the possibilistic framework, we obtain classifiers that maximize the interclass margin. Furthermore, we show that the support vector machine is a

Loo-nin Teow; Kia-fock Loe

2000-01-01

488

The framework of product affection  

Microsoft Academic Search

This paper introduces a conceptual framework for the process underlying emotional responses that result from the perception of products. The framework distinguishes different kinds of product affection on the basis of emotional psychology. Accordingly, the product affection is divided into three levels: the reflection emotional level, the basic emotional level, the emotional senior level. By revealing the characteristics of the

J. Q. Mao; Y. H. Zhou; H. B. Yang

2009-01-01

489

TIMSS Advanced 2008 Assessment Frameworks  

ERIC Educational Resources Information Center

Developing the Trends in International Mathematics and Science Study (TIMSS) Advanced 2008 Assessment Frameworks was a collaborative venture involving mathematics and physics experts from around the world. The document contains two frameworks for implementing TIMSS Advanced 2008--one for advanced mathematics and one for physics. It also contains…

Garden, Robert A.; Lie, Svein; Robitaille, David F.; Angell, Carl; Martin, Michael O.; Mullis, Ina V.S.; Foy, Pierre; Arora, Alka

2006-01-01

490

The Quality Framework in Norway  

ERIC Educational Resources Information Center

The quality framework summarises and elaborates on the provisions in the Education Act and its regulations, including the National Curriculum, and must be considered in light of the legislation and regulations. The quality framework helps to clarify the responsibilities the school owners (the local and county administration authorities in…

Mandt, Gunnar

2008-01-01

491

Field theoretic simulations of polymer nanocomposites  

SciTech Connect

Polymer field theory has emerged as a powerful tool for describing the equilibrium phase behavior of complex polymer formulations, particularly when one