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1

PHALANX: A Graph-Theoretic Framework for Test Case Prioritization  

E-print Network

PHALANX: A Graph-Theoretic Framework for Test Case Prioritization Murali Krishna Ramanathan Dept, prioritization remains an attractive, albeit conservative, al- ternative; its main goal is to detect as many bugs prioritization for regression testing can be per- formed using different metrics (e.g., statement coverage, path

Koyuturk, Mehmet

2

Unifying Different Theories of Learning: Theoretical Framework and Empirical Evidence  

ERIC Educational Resources Information Center

The main aim of this research study was to test out a conceptual model encompassing the theoretical frameworks of achievement goals, study processing strategies, effort, and reflective thinking practice. In particular, it was postulated that the causal influences of achievement goals on academic performance are direct and indirect through study…

Phan, Huy Phuong

2008-01-01

3

The Theoretical Framework of Cognitive Informatics  

Microsoft Academic Search

ABSTRACT Cognitive Informatics (CI) is a transdisciplinary enquiry of the internal information processing mechanisms and processes of the brain and natural intelligence shared by almost all science and engineering disciplines. This article presents an intensive review of the new field of CI. The structure of the theoretical framework of CI is described encompassing the Layered Reference Model of the Brain

Yingxu Wang

2007-01-01

4

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

5

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

6

Democracy and development: A theoretical framework  

Microsoft Academic Search

A simple framework is set up to discuss the relationship between democracy, material welfare, and development. Democracy is regarded both as a good in its own right, and as an input in the production of material welfare. The optimum level of democracy is then related to the level of development. At the optimum point, the marginal cost of democracy in

Jean-Paul Azam

1994-01-01

7

A Theoretical Framework for Physics Education Research: Modeling Student Thinking  

ERIC Educational Resources Information Center

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…

Redish, Edward F.

2004-01-01

8

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

9

Framework for a space shuttle main engine health monitoring system  

NASA Technical Reports Server (NTRS)

A framework developed for a health management system (HMS) which is directed at improving the safety of operation of the Space Shuttle Main Engine (SSME) is summarized. An emphasis was placed on near term technology through requirements to use existing SSME instrumentation and to demonstrate the HMS during SSME ground tests within five years. The HMS framework was developed through an analysis of SSME failure modes, fault detection algorithms, sensor technologies, and hardware architectures. A key feature of the HMS framework design is that a clear path from the ground test system to a flight HMS was maintained. Fault detection techniques based on time series, nonlinear regression, and clustering algorithms were developed and demonstrated on data from SSME ground test failures. The fault detection algorithms exhibited 100 percent detection of faults, had an extremely low false alarm rate, and were robust to sensor loss. These algorithms were incorporated into a hierarchical decision making strategy for overall assessment of SSME health. A preliminary design for a hardware architecture capable of supporting real time operation of the HMS functions was developed. Utilizing modular, commercial off-the-shelf components produced a reliable low cost design with the flexibility to incorporate advances in algorithm and sensor technology as they become available.

Hawman, Michael W.; Galinaitis, William S.; Tulpule, Sharayu; Mattedi, Anita K.; Kamenetz, Jeffrey

1990-01-01

10

An Evaluation of Theoretical Frameworks for Studying Physically Active Leisure  

Microsoft Academic Search

Recent reviews demonstrate participation in active recreation and the development of an active lifestyle is important to a broad spectrum of society. Reviews further highlight the presence of an underdeveloped knowledge base for active leisure. Theory development is required to guide researchers, practitioners, and policy makers. Specifically, evaluating the theoretical frameworks applied to active recreation is needed to foster collaboration

Anthony A. Beaton; Daniel C. Funk

2008-01-01

11

Reliability Calculus: A Theoretical Framework To Analyze Communication Reliability  

E-print Network

Reliability Calculus: A Theoretical Framework To Analyze Communication Reliability Wenbo He Xue Liu, University of Nebraska-Lincoln School of Computer Science, McGill University § Nokia Research Center Abstract--Communication reliability is one of the most impor- tant concerns and fundamental issues

Liu, Xue

12

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

13

Community of inquiry as a theoretical framework to foster \\  

Microsoft Academic Search

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., Anderson, T., & Archer, W. (2000). Critical inquiry in a

Peter Shea; Temi Bidjerano

2009-01-01

14

Diffusion of Innovations as a Theoretical Framework for Telecenters  

Microsoft Academic Search

Local information and communication resource centers, usually called telecenters, are springing up in developing countries with the objective of bringing the benefits of new communication technologies to the rural poor. Rural telecenters are calling the attention of academic and nonacademic researchers, but there is no theoretical framework to help understand the process of diffusion and adoption of these centers by

Raul Roman

2003-01-01

15

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

16

A theoretical framework for narrative explanation in science  

Microsoft Academic Search

This paper deals with a number of conceptual and theoretical issues that underlie the proposal to employ narrative explanations in science education: What is narra- tive? What is explanation? and What is narrative explanation? In answering these questions, we develop a framework of narrative elements and characteristics of narrative explanations. Two possible examples of narrative explanation are presented and examined

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

2005-01-01

17

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

18

Using Learning Principles as a Theoretical Framework for Instructional Consultations  

ERIC Educational Resources Information Center

Learning theory provides a powerful framework for analyzing instructional consultations and increasing their effectiveness. In this paper, the authors review the main tenets of learning theory, apply them to consultation scenarios, and present a complex case study to show how they can guide analysis and problem solving around challenging…

DiPietro, Michele; Norman, Marie

2014-01-01

19

135 Digital Literacy: Definition, Theoretical Framework, and Competencies  

E-print Network

Abstract: This paper offers an overview of existing definitions and theoretical frameworks for digital literacy. The researcher makes recommendations for an agreed upon definition and theoretical framework and discusses implications for a relationship between digital and visual literacy skills. For some time now, new perspectives on literacy, and the learning processes through which literacy is acquired, has been emerging (Herbert, 1991). While there is agreement that a new set of 21st-century skills involving technologies are needed for literacy, there is little consensus about precisely what knowledge and abilities are necessary for people to be digitally literate (Ba, Tally, & Tsikalas, 2002). To obtain a consensus, there must be an agreed upon definition for digital literacy and an identification of its particular competencies. For this to happen, two initial steps must be taken: (a) Begin the development of an instrument designed to identify the major dimensions of digital literacy, and (b) conduct an initial validation study of this instrument. This paper offers an overview of existing digital literacy definitions, frameworks, and competencies; makes recommendations for the refinement of a digital literacy model that includes visual literacy as a core skill; and discusses implications for a relationship

Mark D. Osterman

20

Theoretical framework for estimating snow distribution through point measurements  

NASA Astrophysics Data System (ADS)

In recent years, marked improvements in our knowledge of the statistical properties of the spatial distribution of snow properties have been achieved thanks to improvements in measuring technologies (e.g. LIDAR, TLS, and GPR). Despite of this, objective and quantitative frameworks for the evaluation of errors and extrapolations in snow measurements have been lacking. Here, we present a theoretical framework for quantitative evaluations of the uncertainty of point measurements of snow depth when used to represent the average depth over a profile section or an area. The error is defined as the expected value of the squared difference between the real mean of the profile/field and the sample mean from a limited number of measurements. The model is tested for one and two dimensional survey designs that range from a single measurement to an increasing number of regularly-spaced measurements. Using high-resolution (~1 m) LIDAR snow depths at two locations in Colorado, we show that the sample errors follow the theoretical behavior. Furthermore, we show how the determination of the spatial location of the measurements can be reduced to an optimization problem for the case of the predefined number of measurements, or to the designation of an acceptable uncertainty level to determine the total number of regularly-spaced measurements required to achieve such error. On this basis, a series of figures are presented that can be used to aid in the determination of the survey design under the conditions described, and under the assumption of prior knowledge of the spatial covariance/correlation properties. With this methodology, better objective survey designs can be accomplished, tailored to the specific applications for which the measurements are going to be used. The theoretical framework can be extended to other spatially distributed snow variables (e.g. SWE) whose statistical properties are comparable to those of snow depth.

Trujillo, E.; Lehning, M.

2015-01-01

21

One theoretical framework for cardiovascular disease prevention in women.  

PubMed

Cardiovascular disease (CVD) is the leading cause of morbidity and mortality for women in the United States. Vulnerable and underserved women are even less likely to participate in healthy lifestyle behaviors to prevent CVD than the general US population. Many women are not aware that they are at risk for CVD and do not modify unhealthy lifestyle behaviors to reduce their risks for CVD. Healthcare providers may not promote awareness of CVD or consistently counsel female patients concerning lifestyle behavior modifications to reduce their risks for CVD. "The Evidence-Based Guidelines for the Prevention of Cardiovascular Disease in Women 2011 Update: A Guideline From the American Heart Association" provides a guide for healthcare providers to help women lower their risk for heart disease. By using a theoretical approach, nurses can facilitate implementation of these evidence-based guidelines to help women reduce their risks for CVD. Commonly used intrapersonal, interpersonal, and organizational- and community-level health behavior change theories that can be used to effectively promote CVD risk reduction in women will be discussed. The theoretical basis for changing CVD risk behaviors in women can be applied by using the PRECEDE-PROCEED Model to guide planning, implementing, and evaluating health behavior programs. The purpose of this article was to help nurses improve healthcare delivery by using the PRECEDE-PROCEED Model as a theoretical framework to guide CVD risk reduction efforts for women. PMID:21912271

Peterson, Jane Anthony

2012-01-01

22

Exploring the UMLS: a rough sets based theoretical framework.  

PubMed Central

The Unified Medical Language System (UMLS) [1] has a unique and leading position in the evolution of thesauri and metathesauri. Features that set it apart are: its composition from more than fifty component health care vocabularies; the sophisticated UMLS ontology linking the Metathesaurus with structures such as the Semantic Network and the SPECIALIST lexicon; and the high level of social collaboration invested in its construction and growth. It is our thesis that in order to successfully harness such a complex vocabulary for text retrieval we need sophisticated methods derived from a deeper understanding of the UMLS system. Thus we propose a theoretical framework based on the theory of rough sets, that supports the systematic and exploratory investigation of the UMLS Metathesaurus for text retrieval. Our goal is to make it more feasible for individuals such as patients and health care professionals to access relevant information at the point of need. PMID:10566340

Srinivasan, P.

1999-01-01

23

Developing, evaluating, and refining stock assessment framework for the Maine sea urchin fishery  

E-print Network

Developing, evaluating, and refining stock assessment framework for the Maine sea urchin fishery A Bayesian stock assessment framework has been developed and applied to the Maine sea urchin fishery dynamics of sea urchin, which can take into account of large spatial variations in growth; (2) Bayesian

Chen, Yong

24

Theoretical framework for the viscosity equation for strong glasses  

NASA Astrophysics Data System (ADS)

One of the most important applications of the stochastic matrix method is the evaluation of the probability of forming a ring for B2O3, as a description of the growth process of a solid. In a recent work Dagdug and García-Colín (L. Dagdug and L. S. García-Colín, J. Phys.:Condens. Matter 11, 2193 (1999)) generalized this method for the same substance introducing a probabilistic cut temperature finding a theoretical VFT-like equation for the average relaxation time (or viscosity) of the strong glass forming liquid. To carry out their purpose they take the average relaxation time as inversely proportional to the probability of forming a ring, calculated for a large number of steps of growth. They also use the temperature derivative method to recognize the functional dependence of the relaxation time. Dagdug et. al. (L. Dagdug, L. S. García-Colín and P. Goldstein, Rev. Mex Phys, 2004 (in press)) used the configurational entropy to calculate the isoentropic tempearture for this boron oxide glass using the probability of find boroxol rings and dendrites. With the prediction of the VFT-like equation and the calculation of the isoentropic temperature, in this work, we give a completely theoretical framework to understand the viscosity processes in strong glasses.

Dagdug, Leonardo

2005-04-01

25

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

26

Non-state actors in international politics: a theoretical framework  

E-print Network

In recent years, there has been a burgeoning of studies related to international terrorism, many related to and resulting from current events and occurrences. However, the enterprise of terrorism scholarship within the framework of political science...

Paley, Abram Wil

2009-05-15

27

Exploring a theoretical framework for understanding doctoral education  

Microsoft Academic Search

In this paper, we explore the potential of activity theory as a conceptual framework to understand doctoral education. In particular, we highlight its utility as a way of thinking about interactions across the multiple contexts influencing doctoral experience, and its use as a tool to understand the structural tensions students experience. We incorporate an exploration of the strengths and weaknesses

Nick Hopwood; Lynn McAlpine

2007-01-01

28

An Information Theoretic Framework for Ontology-based Bioinformatics  

Microsoft Academic Search

With myriad information being generated from high-throughput experiments such as microarrays and sequencing technologies, an ever-increasing amount of data is being recorded and analyzed with the help of hierarchical ontologies, such as the gene ontology (GO). We have developed a novel framework- based on the well established foundations of information theory- that allows for the evaluation of new types of

G. Alterovitz; M. Xiang; M. F. Ramoni

2007-01-01

29

Theoretical frameworks used to discuss ethical issues in private physiotherapy practice and proposal of a new ethical tool.  

PubMed

In the past, several researchers in the field of physiotherapy have asserted that physiotherapy clinicians rarely use ethical knowledge to solve ethical issues raised by their practice. Does this assertion still hold true? Do the theoretical frameworks used by researchers and clinicians allow them to analyze thoroughly the ethical issues they encounter in their everyday practice? In our quest for answers, we conducted a literature review and analyzed the ethical theoretical frameworks used by physiotherapy researchers and clinicians to discuss the ethical issues raised by private physiotherapy practice. Our final analysis corpus consisted of thirty-nine texts. Our main finding is that researchers and clinicians in physiotherapy rarely use ethical knowledge to analyze the ethical issues raised in their practice and that gaps exist in the theoretical frameworks currently used to analyze these issues. Consequently, we developed, for ethical analysis, a four-part prism which we have called the Quadripartite Ethical Tool (QET). This tool can be incorporated into existing theoretical frameworks to enable professionals to integrate ethical knowledge into their ethical analyses. The innovative particularity of the QET is that it encompasses three ethical theories (utilitarism, deontologism, and virtue ethics) and axiological ontology (professional values) and also draws on both deductive and inductive approaches. It is our hope that this new tool will help researchers and clinicians integrate ethical knowledge into their analysis of ethical issues and contribute to fostering ethical analyses that are grounded in relevant philosophical and axiological foundations. PMID:24942342

Drolet, Marie-Josée; Hudon, Anne

2014-06-19

30

On Motivation, Research Agendas, and Theoretical Frameworks. "MLJ" Response Article.  

ERIC Educational Resources Information Center

Three recent articles by Dornyei, Crookes and Schmidt, and Oxford and Sherin on the role of motivation in the learning of a second or foreign language are discussed. Similarities among them that support Gardner's theoretical model are described. (45 references) (LB)

Gardner, R. C.; Tremblay, P. F.

1994-01-01

31

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

32

A Decision Theoretic Framework for Ranking using Implicit Feedback  

Microsoft Academic Search

This paper presents a decision theoretic ranking system that incorporates both explicit and implicit feedback. The system has a model that predicts, given all available data at query time, different interactions a person might have with search results. Possible interactions include relevance labelling and clicking. We define a utility function that takes as input the outputs of the interaction model

Onno Zoeter; Michael Taylor; Ed Snelson; John Guiver; Nick Craswell; Martin Szummer

2008-01-01

33

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

34

Developing a Theoretical Framework for Examining Student Understanding of Fractional Concepts: An Historical Accounting  

ERIC Educational Resources Information Center

In 2007, a group of mathematics educators and researchers met to examine rational numbers and why children have such an issue with them. An extensive review of the literature on fractional understanding was conducted. The ideas in that literature were then consolidated into a theoretical framework for examining fractions. Once that theoretical

Cooper, Susan M.; Wilkerson, Trena L.; Montgomery, Mark; Mechell, Sara; Arterbury, Kristin; Moore, Sherrie

2012-01-01

35

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.

36

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

37

The symmetries of image formation by scattering. I. Theoretical framework.  

PubMed

We perceive the world through images formed by scattering. The ability to interpret scattering data mathematically has opened to our scrutiny the constituents of matter, the building blocks of life, and the remotest corners of the universe. Here, we present an approach to image formation based on the symmetry properties of operations in three-dimensional space. Augmented with graph-theoretic means, this approach can recover the three-dimensional structure of objects from random snapshots of unknown orientation at four orders of magnitude higher complexity than previously demonstrated. This is critical for the burgeoning field of structure recovery by X-ray Free Electron Lasers, as well as the more established electron microscopic techniques, including cryo-electron microscopy of biological systems. In a subsequent paper, we demonstrate the recovery of structure and dynamics from experimental, ultralow-signal random sightings of systems with X-rays, electrons, and photons, with no orientational or timing information. PMID:22714309

Giannakis, Dimitrios; Schwander, Peter; Ourmazd, Abbas

2012-06-01

38

Theoretical investigation of hydrogen interaction in Covalent Organic Framework - 1  

NASA Astrophysics Data System (ADS)

Density functional theory (DFT) and second-order Møller-Plesset perturbation theory (MP2) are carried out to calculate the non-dissociative hydrogen adsorption energies of covalent organic framework-1 (COF-1). Our DFT results show that a hydrogen molecule prefers to adsorb on top of oxygen of boroxine (B3O3) ring and C---C bridge site of benzene ring when a single H2 is interacting with the COF-1. Moreover, the trend of adsorption energy obtained from the DFT calculations is found to be in good agreement with the MP2 binding energy trend. However, hydrogen molecules prefer to trap on top of oxygen at B3O3 ring and carbon atom at C6H4 ring at high hydrogen loadings. By performing ab initio molecular dynamics simulations, we observed that H2 molecules are able to stay at their initial adsorption sites due to blocking by occupancy of hydrogen molecules at the adsorption sites. (See also J. Phys. Chem. C, 113, 8498 (2009))

Srepusharawoot, Pornjuk; Scheicher, Ralph H.; Moysées Araúujo, C.; Blomqvist, Andreas; Ahuja, Rajeev

2010-03-01

39

Interprofessional learning in acute care: developing a theoretical framework.  

PubMed

There are a number of adult learning theories that have been used to inform IPE delivery (e.g. Kolb's theory of experiential learning), and one of the most important to emerge in recent times has been the contact theory or contact hypothesis, which looks at the outcomes when two differing groups of health care professionals are brought together. The team responsible for the development of an acute care IPE programme called Student Management of Acute illness Recognition and Treatment (SMART(TM)) set out to incorporate the most up to date educational theory into the programme. Following an extensive review of the literature, it was decided to adopt a blended theoretical approach, involving a combination of 'contact theory' and 'scaffolding', supported by interprofessional facilitation. It was clear that there were a number of enabling factors that could be incorporated into any IPE programme. These were the educational setting, group characteristics (group size, balance and stability), quality of IPE facilitation and opportunities for informal learning. Although the contact theory provides us with a better understanding of interprofessional groups, an understanding of how the organised contact of different professional groups of students helps to reduce intergroup prejudice and improve intergroup relations is still required. PMID:21531487

Lewis, Robin

2012-04-01

40

Emergent Writing in Preschoolers: Preliminary Evidence for a Theoretical Framework.  

PubMed

Researchers and educators use the term emergent literacy to refer to a broad set of skills and attitudes that serve as foundational skills for acquiring success in later reading and writing; however, models of emergent literacy have generally focused on reading and reading-related behaviors. Hence, the primary aim of this study was to articulate and evaluate a theoretical model of the components of emergent writing. Alternative models of the structure of individual and developmental differences of emergent writing and writing-related skills were examined in 372 preschool children who ranged in age from 3- to 5-years using confirmatory factor analysis. Results from a confirmatory factor analysis provide evidence that these emergent writing skills are best described by three correlated but distinct factors, (a) Conceptual Knowledge, (b) Procedural Knowledge, and (c) Generative Knowledge. Evidence that these three emergent writing factors show different patterns of relations to emergent literacy constructs is presented. Implications for understanding the development of writing and assessment of early writing skills are discussed. PMID:25316955

Puranik, Cynthia S; Lonigan, Christopher J

2014-10-01

41

A framework for biodynamic feedthrough analysis--part I: theoretical foundations.  

PubMed

Biodynamic feedthrough (BDFT) is a complex phenomenon, which has been studied for several decades. However, there is little consensus on how to approach the BDFT problem in terms of definitions, nomenclature, and mathematical descriptions. In this paper, a framework for biodynamic feedthrough analysis is presented. The goal of this framework is two-fold. First, it provides some common ground between the seemingly large range of different approaches existing in the BDFT literature. Second, the framework itself allows for gaining new insights into BDFT phenomena. It will be shown how relevant signals can be obtained from measurement, how different BDFT dynamics can be derived from them, and how these different dynamics are related. Using the framework, BDFT can be dissected into several dynamical relationships, each relevant in understanding BDFT phenomena in more detail. The presentation of the BDFT framework is divided into two parts. This paper, Part I, addresses the theoretical foundations of the framework. Part II, which is also published in this issue, addresses the validation of the framework. The work is presented in two separate papers to allow for a detailed discussion of both the framework's theoretical background and its validation. PMID:24816627

Venrooij, Joost; van Paassen, Marinus M; Mulder, Mark; Abbink, David A; Mulder, Max; van der Helm, Frans C T; Bulthoff, Heinrich H

2014-09-01

42

A Research Framework on Social Networking Sites Usage: Critical Review and Theoretical Extension  

Microsoft Academic Search

\\u000a Despite the worldwide popularity and rapid proliferation of social networking sites (SNS), e.g., Facebook, our understanding\\u000a about what drive people to SNS and how they use them remains limited. This study aims at establishing a theoretical framework\\u000a guiding the research on SNS usage. Built upon the Theory of Acceptance and Use of Technology (UTAUT), the framework makes\\u000a following major extensions:

Kathy Ning Shen; Mohamed Khalifa

2010-01-01

43

An information-theoretic framework for optimal temperature sensor allocation and full-chip thermal monitoring  

Microsoft Academic Search

Full-chip thermal monitoring is an important and challenging issue in today's microprocessor design. In this paper, we propose a new information-theoretic framework to quantitatively model the uncertainty of on-chip temperature variation by differential entropy. Based on this framework, an efficient optimization scheme is developed to find the optimal spatial locations for temperature sensors such that the full-chip thermal map can

Huapeng Zhou; Xin Li; Chen-Yong Cher; Eren Kursun; Haifeng Qian; Shi-Chune Yao

2012-01-01

44

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

45

Professional Development in Higher Education. A Theoretical Framework for Action Research.  

ERIC Educational Resources Information Center

This book proposes that action research can give higher education professional development a theoretical framework by integrating educational research and teaching in higher education. The book offers an alternative paradigm in higher education research and development and explains the differences between the traditional and alternative paradigms…

Zuber-Skerritt, Ortrun

46

Testing Social Cognitive Theory as a theoretical framework to predict smoking relapse among daily smoking adolescents  

Microsoft Academic Search

Predictors of adolescent smoking relapse are largely unknown, since studies either focus on relapse among adults, or address (long-term) smoking cessation but not relapse. In the present study, Social Cognitive Theory (SCT) was used as a theoretical framework to examine the first and second lapses, as well as mild and heavy relapse into smoking among 135 daily smoking adolescents who

Rinka M. P. Van Zundert; Linda M. Nijhof; Rutger C. M. E. Engels

2009-01-01

47

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

ERIC Educational Resources Information Center

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…

Koh, Kyungwon

2011-01-01

48

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

49

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

50

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

51

A Graph Theoretic Framework for Preventing the Wormhole Attack in Wireless Ad Hoc Networks  

E-print Network

or long-range wireless link, between two points in the network that are not within communication range the direct communication range will have to rely on intermediate nodes to exchange messages, thus formingA Graph Theoretic Framework for Preventing the Wormhole Attack in Wireless Ad Hoc Networks Radha

Poovendran, Radha

52

NLPIR: A Theoretical Framework for Applying Natural Language Processing to Information Retrieval.  

ERIC Educational Resources Information Center

Proposes a theoretical framework called NLPIR that integrates natural language processing (NLP) into information retrieval (IR) based on the assumption that there exists representation distance between queries and documents. Discusses problems in traditional keyword-based IR, including relevance, and describes some existing NLP techniques.…

Zhou, Lina; Zhang, Dongsong

2003-01-01

53

An Empirical-Theoretical Analysis Framework for Public Participation in Environmental Impact Assessment  

Microsoft Academic Search

Public participation has been increasingly recognized as one of the most important aspects of environmental impact assessment. However, the definition of adequate evaluative criteria for public participation, with a strong theoretical backing, the functionality of empirical best practice and the consideration of the country-specific context, has remained elusive. The evaluative framework developed here is an attempt to fill this gap.

Juan Palerm

2000-01-01

54

A Game-Theoretic Framework for Jamming Attacks and Mitigation in Commercial  

E-print Network

will be deployed on next-generation commercial aircrafts, forming essential components of the aircraft's onboardA Game-Theoretic Framework for Jamming Attacks and Mitigation in Commercial Aircraft Wireless on commercial aircraft is likely to increase. Introduction of services to an aircraft network creates a host

Tague, Patrick

55

First-Year Biology Students' Understandings of Meiosis: An Investigation Using a Structural Theoretical Framework  

ERIC Educational Resources Information Center

Meiosis is a biological concept that is both complex and important for students to learn. This study aims to explore first-year biology students' explanations of the process of meiosis, using an explicit theoretical framework provided by the Structure of the Observed Learning Outcome (SOLO) model. The research was based on responses of 334…

Quinn, Frances; Pegg, John; Panizzon, Debra

2009-01-01

56

Memory and the Self in Autism: A Review and Theoretical Framework  

ERIC Educational Resources Information Center

This article reviews research on (a) autobiographical episodic and semantic memory, (b) the self-reference effect, (c) memory for the actions of self versus other (the self-enactment effect), and (d) non-autobiographical episodic memory in autism spectrum disorder (ASD), and provides a theoretical framework to account for the bidirectional…

Lind, Sophie E.

2010-01-01

57

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

58

Grounding desire and motivated behavior: A theoretical framework and review of empirical evidence  

E-print Network

psychological mechanisms that produce desires and consequently affect our behavior to fulfill them? What neural these questions, we develop a grounded theory of desire and motivated behavior, and we review empirical work1 Grounding desire and motivated behavior: A theoretical framework and review of empirical

Barsalou, Lawrence W.

59

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

ERIC Educational Resources Information Center

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…

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

2014-01-01

60

Reliability Modeling of Cyber-Physical Electric Power Systems: A System-Theoretic Framework  

E-print Network

1 Reliability Modeling of Cyber-Physical Electric Power Systems: A System-Theoretic Framework on tools for quantifying power system reliability when there is coupling between cyber and physical and allow system operation closer to physical limits for increased efficiency [1], [2], [3], [4

Liberzon, Daniel

61

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

62

Framework for a U.S. Geological Survey Hydrologic Climate-Response Program in Maine  

USGS Publications Warehouse

It is important to monitor hydrologic systems in the United States that could change dramatically over the short term as a result of climate change. Many ecological effects of climate change can be understood only if hydrologic data networks are in place. Because of its humid, temperate climate and its substantial annual snowpack, Maine's seasonal water cycle is sensitive to air temperature changes (Hodgkins and others, 2003). Monitoring of relevant hydrologic data would provide important baseline information against which future climate change can be measured. A series of recent investigations by the U.S. Geological Survey (USGS) has documented changes in several components of the water cycle, including earlier snowmelt runoff in Maine during the last 30 to 40 years (Hodgkins and others, 2003), earlier lake- and river-ice breakups (Hodgkins and others, 2002; Hodgkins and others, 2005), and a denser and thinner late-winter snowpack (Hodgkins and Dudley, 2006). Snowmelt runoff timing was measured as the date, each year, by which half of the total winter-spring streamflow passed a streamflow-gaging station. Historical snowmelt runoff timing for the Piscataquis River in central Maine is shown in figure 1 as an example. Results of climate projections input to hydrologic models indicate that hydrologic trends, such as earlier spring snowmelt runoff, are expected to continue into the future (Hayhoe and others, 2007). These trends could affect species at the southern edge of their range in Maine, such as Atlantic salmon and Canada lynx, and may also affect availability of water for human use. This fact sheet describes the framework of a hydrologic climate-response program that would improve understanding of the effects of future climate change in Maine.

Hodgkins, Glenn A.; Lent, Robert M.; Dudley, Robert W.; Schalk, Charles W.

2009-01-01

63

A game-theoretic framework for landmark-based image segmentation.  

PubMed

A novel game-theoretic framework for landmark-based image segmentation is presented. Landmark detection is formulated as a game, in which landmarks are players, landmark candidate points are strategies, and likelihoods that candidate points represent landmarks are payoffs, determined according to the similarity of image intensities and spatial relationships between the candidate points in the target image and their corresponding landmarks in images from the training set. The solution of the formulated game-theoretic problem is the equilibrium of candidate points that represent landmarks in the target image and is obtained by a novel iterative scheme that solves the segmentation problem in polynomial time. The object boundaries are finally extracted by applying dynamic programming to the optimal path searching problem between the obtained adjacent landmarks. The performance of the proposed framework was evaluated for segmentation of lung fields from chest radiographs and heart ventricles from cardiac magnetic resonance cross sections. The comparison to other landmark-based segmentation techniques shows that the results obtained by the proposed game-theoretic framework are highly accurate and precise in terms of mean boundary distance and area overlap. Moreover, the framework overcomes several shortcomings of the existing techniques, such as sensitivity to initialization and convergence to local optima. PMID:22692901

Ibragimov, Bulat; Likar, Boštjan; Pernus, Franjo; Vrtovec, Tomaz

2012-09-01

64

Theoretical framework for the histone modification network: modifications in the unstructured histone tails form a robust scale-free network  

Microsoft Academic Search

A rapid increase in research on the relationship between histone modifications and their subsequent reactions in the nucleus has revealed that the histone modification system is complex, and robust against point mutations. The prevailing theoretical framework (the histone code hypothesis) is inadequate to explain either the complexity or robustness, making the formulation of a new theoretical framework both necessary and

Yohei Hayashi; Toshiya Senda; Norihiko Sano; Masami Horikoshi

2009-01-01

65

Analysis of poetic literature using B. F. Skinner's theoretical framework from verbal behavior  

PubMed Central

This paper examines Skinner's work on verbal behavior in the context of literature as a particular class of written verbal behavior. It looks at contemporary literary theory and analysis and the contributions that Skinner's theoretical framework can make. Two diverse examples of poetic literature are chosen and analyzed following Skinner's framework, examining the dynamic interplay between the writer and reader that take place within the bounds of the work presented. It is concluded that Skinner's hypotheses about verbal behavior and the functional approach to understanding it have much to offer literary theorists in their efforts to understand literary works and should be more carefully examined.

Luke, Nicole M.

2003-01-01

66

Framework for a U.S. Geological Survey Hydrologic Climate-Response Program in Maine  

USGS Publications Warehouse

This report presents a framework for a U.S. Geological Survey (USGS) hydrologic climate-response program designed to provide early warning of changes in the seasonal water cycle of Maine. Climate-related hydrologic changes on Maine's rivers and lakes in the winter and spring during the last century are well documented, and several river and lake variables have been shown to be sensitive to air-temperature changes. Monitoring of relevant hydrologic data would provide important baseline information against which future climate change can be measured. The framework of the hydrologic climate-response program presented here consists of four major parts: (1) identifying homogeneous climate-response regions; (2) identifying hydrologic components and key variables of those components that would be included in a hydrologic climate-response data network - as an example, streamflow has been identified as a primary component, with a key variable of streamflow being winter-spring streamflow timing; the data network would be created by maintaining existing USGS data-collection stations and establishing new ones to fill data gaps; (3) regularly updating historical trends of hydrologic data network variables; and (4) establishing basins for process-based studies. Components proposed for inclusion in the hydrologic climate-response data network have at least one key variable for which substantial historical data are available. The proposed components are streamflow, lake ice, river ice, snowpack, and groundwater. The proposed key variables of each component have extensive historical data at multiple sites and are expected to be responsive to climate change in the next few decades. These variables are also important for human water use and (or) ecosystem function. Maine would be divided into seven climate-response regions that follow major river-basin boundaries (basins subdivided to hydrologic units with 8-digit codes or larger) and have relatively homogeneous climates. Key hydrologic variables within each climate-response region would be analyzed regularly to maintain up-to-date analyses of year-to-year variability, decadal variability, and longer term trends. Finally, one basin in each climate-response region would be identified for process-based hydrologic and ecological studies.

Hodgkins, Glenn A.; Lent, Robert M.; Dudley, Robert W.; Schalk, Charles W.

2009-01-01

67

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

68

Multi-scale theoretical investigation of hydrogen storage in covalent organic frameworks  

NASA Astrophysics Data System (ADS)

The quest for efficient hydrogen storage materials has been the limiting step towards the commercialization of hydrogen as an energy carrier and has attracted a lot of attention from the scientific community. Sophisticated multi-scale theoretical techniques have been considered as a valuable tool for the prediction of materials storage properties. Such techniques have also been used for the investigation of hydrogen storage in a novel category of porous materials known as Covalent Organic Frameworks (COFs). These framework materials are consisted of light elements and are characterized by exceptional physicochemical properties such as large surface areas and pore volumes. Combinations of ab initio, Molecular Dynamics (MD) and Grand Canonical Monte-Carlo (GCMC) calculations have been performed to investigate the hydrogen adsorption in these ultra-light materials. The purpose of the present review is to summarize the theoretical hydrogen storage studies that have been published after the discovery of COFs. Experimental and theoretical studies have proven that COFs have comparable or better hydrogen storage abilities than other competitive materials such as MOF. The key factors that can lead to the improvement of the hydrogen storage properties of COFs are highlighted, accompanied with some recently presented theoretical multi-scale studies concerning these factors.

Tylianakis, Emmanuel; Klontzas, Emmanouel; Froudakis, George E.

2011-03-01

69

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

70

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

71

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

72

Fat stigma and public health: a theoretical framework and ethical analysis.  

PubMed

This paper proposes a theoretical framework for understanding fat stigma and its impact on people's well-being. It argues that stigma should never be used as a tool to achieve public health ends. Drawing on Bruce Link and Jo Phelan's 2001 conceptualization of stigma as well as the works of Hilde Lindemann, Paul Benson, and Margaret Urban Walker on identity, positionality, and agency, this paper clarifies the mechanisms by which stigmatizing, oppressive conceptions of overweight and obesity damage identities and diminish moral agency, arguing that the use of obesity-related stigma for public health ends violates the bioethics principles of nonmaleficence, autonomy, and justice. PMID:25423850

Abu-Odeh, Desiree

2014-09-01

73

A theoretical framework for a virtual diabetes self-management community intervention.  

PubMed

Due to its high prevalence, chronic nature, potential complications, and self-management challenges for patients, diabetes presents significant health education and support issues. We developed and pilot-tested a virtual community for adults with type 2 diabetes to promote self-management education and provide social support. Although digital-based programs such as virtual environments can address significant barriers to reaching patients (i.e., child care, transportation, location), they must be strongly grounded in a theoretical basis to be well-developed and effective. In this article, we discuss how we synthesized behavioral and virtual environment theoretical frameworks to guide the development of SLIDES (Second Life Impacts Diabetes Education and Support). PMID:24451083

Vorderstrasse, Allison; Shaw, Ryan J; Blascovich, Jim; Johnson, Constance M

2014-10-01

74

A Single Theoretical Framework for Circular Features Processing in Humans: Orientation and Direction of Motion Compared  

PubMed Central

Common computational principles underlie processing of various visual features in the cortex. They are considered to create similar patterns of contextual modulations in behavioral studies for different features as orientation and direction of motion. Here, I studied the possibility that a single theoretical framework, implemented in different visual areas, of circular feature coding and processing could explain these similarities in observations. Stimuli were created that allowed direct comparison of the contextual effects on orientation and motion direction with two different psychophysical probes: changes in weak and strong signal perception. One unique simplified theoretical model of circular feature coding including only inhibitory interactions, and decoding through standard vector average, successfully predicted the similarities in the two domains, while different feature population characteristics explained well the differences in modulation on both experimental probes. These results demonstrate how a single computational principle underlies processing of various features across the cortices. PMID:22661940

Tzvetanov, Tzvetomir

2012-01-01

75

Graph theoretic framework based cooperative control and estimation of multiple UAVs for target tracking  

NASA Astrophysics Data System (ADS)

Designing the control technique for nonlinear dynamic systems is a significant challenge. Approaches to designing a nonlinear controller are studied and an extensive study on backstepping based technique is performed in this research with the purpose of tracking a moving target autonomously. Our main motivation is to explore the controller for cooperative and coordinating unmanned vehicles in a target tracking application. To start with, a general theoretical framework for target tracking is studied and a controller in three dimensional environment for a single UAV is designed. This research is primarily focused on finding a generalized method which can be applied to track almost any reference trajectory. The backstepping technique is employed to derive the controller for a simplified UAV kinematic model. This controller can compute three autopilot modes i.e. velocity, ground heading (or course angle), and flight path angle for tracking the unmanned vehicle. Numerical implementation is performed in MATLAB with the assumption of having perfect and full state information of the target to investigate the accuracy of the proposed controller. This controller is then frozen for the multi-vehicle problem. Distributed or decentralized cooperative control is discussed in the context of multi-agent systems. A consensus based cooperative control is studied; such consensus based control problem can be viewed from the algebraic graph theory concepts. The communication structure between the UAVs is represented by the dynamic graph where UAVs are represented by the nodes and the communication links are represented by the edges. The previously designed controller is augmented to account for the group to obtain consensus based on their communication. A theoretical development of the controller for the cooperative group of UAVs is presented and the simulation results for different communication topologies are shown. This research also investigates the cases where the communication topology switches to a different topology over particular time instants. Lyapunov analysis is performed to show stability in all cases. Another important aspect of this dissertation research is to implement the controller for the case, where perfect or full state information is not available. This necessitates the design of an estimator to estimate the system state. A nonlinear estimator, Extended Kalman Filter (EKF) is first developed for target tracking with a single UAV. The uncertainties involved with the measurement model and dynamics model are considered as zero mean Gaussian noises with some known covariances. The measurements of the full state of the target are not available and only the range, elevation, and azimuth angle are available from an onboard seeker sensor. A separate EKF is designed to estimate the UAV's own state where the state measurement is available through on-board sensors. The controller computes the three control commands based on the estimated states of target and its own states. Estimation based control laws is also implemented for colored noise measurement uncertainties, and the controller performance is shown with the simulation results. The estimation based control approach is then extended for the cooperative target tracking case. The target information is available to the network and a separate estimator is used to estimate target states. All of the UAVs in the network apply the same control law and the only difference is that each UAV updates the commands according to their connection. The simulation is performed for both cases of fixed and time varying communication topology. Monte Carlo simulation is also performed with different sample noises to investigate the performance of the estimator. The proposed technique is shown to be simple and robust to noisy environments.

Ahmed, Mousumi

76

The Community-First Land-Centred Theoretical Framework: Bringing a "Good Mind" to Indigenous Education Research?  

ERIC Educational Resources Information Center

This article introduces an emergent research theoretical framework, the community-first Land-centred research framework. Carefully examining the literature within Indigenous educational research, we noted the limited approaches for engaging in culturally aligned and relevant research within Indigenous communities. The community-first Land-centred…

Styres, Sandra D.; Zinga, Dawn M.

2013-01-01

77

Revisiting Symbolic Interactionism as a Theoretical Framework Beyond the Grounded Theory Tradition.  

PubMed

The tight bond between grounded theory (GT) and symbolic interactionism (SI) is well known within the qualitative health research field. We aimed to disentangle this connection through critical reflection on the conditions under which it might add value as an underpinning to studies outside the GT tradition. Drawing on an examination of the central tenets of SI, we illustrate with a field study using interpretive description as methodology how SI can be applied as a theoretical lens through which layers of socially constructed meaning can help surface the subjective world of patients. We demonstrate how SI can function as a powerful framework for human health behavior research through its capacity to orient questions, inform design options, and refine analytic directions. We conclude that using SI as a lens can serve as a translation mechanism in our quest to interpret the subjective world underlying patients' health and illness behavior. PMID:25316693

Handberg, Charlotte; Thorne, Sally; Midtgaard, Julie; Nielsen, Claus Vinther; Lomborg, Kirsten

2014-10-14

78

[Epidemiology as a theoretical-methodological framework in the nurses' working process].  

PubMed

The objective of this reflection was to understand epidemiology as the theoretical-methodological framework for collective health nursing practice. This study is a bibliographic investigation which analyzed articles and books that point out the strengths and weaknesses of classic, social and critical epidemiology, with the purpose to examine their concepts in regards to nursing practice. The connections between the knowledge obtained from the above mentioned views of epidemiology which allow the creation of nursing interventions to change health realities are discussed. Critical epidemiology is supported by the recognition of the protecting processes and wearing determinants of the health-disease process experienced by different social classes. Hence, nurses should plan health interventions aiming beyond the identified illness, proposing interventions committed to changing historical and social processes, taking into account the unique, particular or structural dimensions that eventually determine the health-disease process in individuals or groups. PMID:23380799

de Medeiros, Adeli Regina Prizybicien; Larocca, Liliana Müller; Chaves, Marta Maria Nolasco; Meier, Marineli Joaquim; Wall, Marilene Loewen

2012-12-01

79

A Framework for Quality Control and Parameter Optimization in Diffusion Tensor Imaging: Theoretical Analysis and Validation  

PubMed Central

In this Communication, a theoretical framework for quality control and parameter optimization in diffusion tensor imaging (DTI) is presented and validated. The approach is based on the analytical error propagation of the mean diffusivity (Dav) obtained directly from the diffusion-weighted data (DW) acquired using rotationally-invariant and uniformly distributed icosahedral encoding schemes. The error propagation of a recently described and validated cylindrical tensor model is further extrapolated to the spherical tensor case (diffusion anisotropy ~ 0) to relate analytically the precision error in fractional tensor anisotropy (FA) with the mean diffusion signal-to-noise ratio (DNR). The approach provided simple analytical and empirical quality control measures for optimization of diffusion parameter space in an isotropic medium that can be tested using widely available water phantoms. PMID:17442523

Hasan, Khader M.

2007-01-01

80

Biological stoichiometry: a theoretical framework connecting ecosystem ecology, evolution, and biochemistry for application in astrobiology  

NASA Astrophysics Data System (ADS)

Astrobiology is an extremely wide-ranging field and thus is in special need of conceptual and theoretical frameworks that can integrate its various arenas of study. In this paper I review recent work associated with a conceptual framework known as "ecological stoichiometry" and even more recent extensions in the development of "biological stoichiometry". Ecological stoichiometry is the study of the balance of energy and multiple chemical elements in ecological interactions and has developed rapidly in the study of nutrient cycling and energy flow in aquatic food webs. It identifies the elemental composition of interacting biota as central in understanding the nature of their interactions and dynamics, including key feedbacks via nutrient recycling. Biological stoichiometry extends this mode of thinking to all types of biological systems. It especially seeks to better understand, at the biochemical and genetic levels, the factors influencing the elemental composition of living things and the evolutionary forces that drive and constrain that elemental composition. By connecting key concepts of ecosystem ecology, evolutionary biology and biochemistry, stoichiometric theory integrates biological information into a more coherent whole that holds considerable promise for application in astrobiology. Several examples of potential astrobiological applications of stoichiometric analysis are offered, including ones related to pre-biotic evolution, the Cambrian explosion, biosignatures and biological feedbacks on planetary carbon cycling.

Elser, James J.

2003-07-01

81

Theoretical framework for nanoparticle reactivity as a function of aggregation state.  

PubMed

Theory is developed that relates the reactivity of nanoparticles to the structure of aggregates they may form in suspensions. This theory is applied to consider the case of reactive oxygen species (ROS) generation by photosensitization of C(60) fullerenes. Variations in aggregate structure and size appear to account for an apparent paradox in ROS generation as calculated using values for the photochemical kinetics of fullerene (C(60)) and its hydroxylated derivative, fullerol (C(60)(OH)(22-24)) and assuming that structure varies between compact and fractal objects. A region of aggregation-suppressed ROS production is identified where interactions between the particles in compact aggregates dominate the singlet oxygen production. Intrinsic kinetic properties dominate when aggregates are small and/or are characterized by low fractal dimensions. Pseudoglobal sensitivity analysis of model input variables verifies that fractal dimension, and by extension aggregation state, is the most sensitive model parameter when kinetics are well-known. This theoretical framework qualitatively predicts ROS production by fullerol suspensions 2 orders of magnitude higher compared with aggregates of largely undifferentiated C(60) despite nearly an order of magnitude higher quantum yield for the undifferentiated C(60) based on measurements for single molecules. Similar to C(60), other primary nanoparticles will exist as aggregates in many environmental and laboratory suspensions. This work provides a theoretical basis for understanding how the structure of nanoparticle aggregates may affect their reactivity. PMID:20527955

Hotze, Ernest M; Bottero, Jean-Yves; Wiesner, Mark R

2010-07-01

82

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

83

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

84

Measuring determinants of implementation behavior: psychometric properties of a questionnaire based on the theoretical domains framework  

PubMed Central

Background To be able to design effective strategies to improve healthcare professionals’ implementation behaviors, a valid and reliable questionnaire is needed to assess potential implementation determinants. The present study describes the development of the Determinants of Implementation Behavior Questionnaire (DIBQ) and investigates the reliability and validity of this Theoretical Domains Framework (TDF)-based questionnaire. Methods The DIBQ was developed to measure the potential behavioral determinants of the 12-domain version of the TDF (Michie et al., 2005). We identified existing questionnaires including items assessing constructs within TDF domains and developed new items where needed. Confirmatory factor analysis was used to examine whether the predefined structure of the TDF-based questionnaire was supported by the data. Cronbach’s alpha was calculated to assess internal consistency reliability of the questionnaire, and domains’ discriminant validity was investigated. Results We developed an initial questionnaire containing 100 items assessing 12 domains. Results obtained from confirmatory factor analysis and Cronbach’s alpha resulted in the final questionnaire consisting of 93 items assessing 18 domains, explaining 63.3% of the variance, and internal consistency reliability values ranging from .68 to .93. Domains demonstrated good discriminant validity, although the domains ‘Knowledge’ and ‘Skills’ and the domains ‘Skills’ and ‘Social/professional role and identity’ were highly correlated. Conclusions We have developed a valid and reliable questionnaire that can be used to assess potential determinants of healthcare professional implementation behavior following the theoretical domains of the TDF. The DIBQ can be used by researchers and practitioners who are interested in identifying determinants of implementation behaviors in order to be able to develop effective strategies to improve healthcare professionals’ implementation behaviors. Furthermore, the findings provide a novel validation of the TDF and indicate that the domain ‘Environmental context and resources’ might be divided into several environment-related domains. PMID:24641907

2014-01-01

85

A theoretical framework for the incorporation of history in science education  

NASA Astrophysics Data System (ADS)

This thesis formulates a theoretical framework for the incorporation of history of science in science teaching, which, it is argued, is essential to laying a stable foundation for instructional design and future empirical studies. It is assumed that the historical approach to teaching science no longer needs defending and that contextual methods are a pedagogically sound approach to learning. Various cognitive and learning theories suggest that there are five distinct contexts that are important in engaging learners: the theoretical, practical, social, historical, and affective. On the basis of these five contexts, a model for teaching and learning is constructed, in which the story assumes a major role in engaging the learner affectively. This model is named the Story-Driven Contextual Approach (SDCA). The SDCA is introduced to students by means of a narrative, encouraging students to become actively engaged with the five contexts. In the SDCA, students are seen as novice researchers and the teacher as a research director. The place and nature of the historical science story in science education is a relatively undeveloped area in the literature. This thesis argues that the development of the events in a story proceed in the same fashion as the steps in learning a concept. A structural model of a story consisting of a three-stage temporal sequence, which includes a causative element, is presented and developed. It is argued that the conceptual change process, from a temporal perspective, can also be viewed as a three-stage sequence similar to the story. The story can, in this light, be thought of as the re-enactment of a particular type of learning process. This knowledge about the nature of stories can serve as a guiding principle in the designing and writing of effective stories based on the history of science, which are to be incorporated with the SDCA. The SDCA was tested in a university physics class using a constructed story which portrays the heroic personal and scientific efforts of the nineteenth century physicist Lord Kelvin in laying the first successful trans-Atlantic cable. Students designed and undertook various practical and theoretical exercises in the SDCA and observations on its implementation are reported.

Klassen, James Stephen

86

Towards the Development of an Integrative Governance Framework for the Third Sector: A Theoretical Review and Analysis  

Microsoft Academic Search

This paper reviews the theoretical approaches taken in the governance literature in order to assess the relevance of their application to the third sector and to develop an integrative governance framework to help guide third sector organisations as they seek to improve their governance practices. Governance has been studied extensively in the corporate sector, and also, to a much lesser

Murray E. Millar; Anne Abraham

2006-01-01

87

An inverse finite element method for beam shape sensing: theoretical framework and experimental validation  

NASA Astrophysics Data System (ADS)

Shape sensing, i.e., reconstruction of the displacement field of a structure from surface-measured strains, has relevant implications for the monitoring, control and actuation of smart structures. The inverse finite element method (iFEM) is a shape-sensing methodology shown to be fast, accurate and robust. This paper aims to demonstrate that the recently presented iFEM for beam and frame structures is reliable when experimentally measured strains are used as input data. The theoretical framework of the methodology is first reviewed. Timoshenko beam theory is adopted, including stretching, bending, transverse shear and torsion deformation modes. The variational statement and its discretization with C0-continuous inverse elements are briefly recalled. The three-dimensional displacement field of the beam structure is reconstructed under the condition that least-squares compatibility is guaranteed between the measured strains and those interpolated within the inverse elements. The experimental setup is then described. A thin-walled cantilevered beam is subjected to different static and dynamic loads. Measured surface strains are used as input data for shape sensing at first with a single inverse element. For the same test cases, convergence is also investigated using an increasing number of inverse elements. The iFEM-recovered deflections and twist rotations are then compared with those measured experimentally. The accuracy, convergence and robustness of the iFEM with respect to unavoidable measurement errors, due to strain sensor locations, measurement systems and geometry imperfections, are demonstrated for both static and dynamic loadings.

Gherlone, Marco; Cerracchio, Priscilla; Mattone, Massimiliano; Di Sciuva, Marco; Tessler, Alexander

2014-04-01

88

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

89

Linking predator risk and uncertainty to adaptive forgetting: a theoretical framework and empirical test using tadpoles  

PubMed Central

Hundreds of studies have examined how prey animals assess their risk of predation. These studies work from the basic tennet that prey need to continually balance the conflicting demands of predator avoidance with activities such as foraging and reproduction. The information that animals gain regarding local predation risk is most often learned. Yet, the concept of ‘memory’ in the context of predation remains virtually unexplored. Here, our goal was (i) to determine if the memory window associated with predator recognition is fixed or flexible and, if it is flexible, (ii) to identify which factors affect the length of this window and in which ways. We performed an experiment on larval wood frogs, Rana sylvatica, to test whether the risk posed by, and the uncertainty associated with, the predator would affect the length of the tadpoles' memory window. We found that as the risk associated with the predator increases, tadpoles retained predator-related information for longer. Moreover, if the uncertainty about predator-related information increases, then prey use this information for a shorter period. We also present a theoretical framework aiming at highlighting both intrinsic and extrinsic factors that could affect the memory window of information use by prey individuals. PMID:20236976

Ferrari, Maud C. O.; Brown, Grant E.; Bortolotti, Gary R.; Chivers, Douglas P.

2010-01-01

90

Contextualized analysis of a needs assessment using the Theoretical Domains Framework: a case example in endocrinology  

PubMed Central

Background The Theoretical Domains Framework (TDF) is a set of 14 domains of behavior change that provide a framework for the critical issues and factors influencing optimal knowledge translation. Considering that a previous study has identified optimal knowledge translation techniques for each TDF domain, it was hypothesized that the TDF could be used to contextualize and interpret findings from a behavioral and educational needs assessment. To illustrate this hypothesis, findings and recommendations drawn from a 2012 national behavioral and educational needs assessment conducted with healthcare providers who treat and manage Growth and Growth Hormone Disorders, will be discussed using the TDF. Methods This needs assessment utilized a mixed-methods research approach that included a combination of: [a] data sources (Endocrinologists (n:120), Pediatric Endocrinologists (n:53), Pediatricians (n:52)), [b] data collection methods (focus groups, interviews, online survey), [c] analysis methodologies (qualitative - analyzed through thematic analysis, quantitative - analyzed using frequencies, cross-tabulations, and gap analysis). Triangulation was used to generate trustworthy findings on the clinical practice gaps of endocrinologists, pediatric endocrinologists, and general pediatricians in their provision of care to adult patients with adult growth hormone deficiency or acromegaly, or children/teenagers with pediatric growth disorders. The identified gaps were then broken into key underlying determinants, categorized according to the TDF domains, and linked to optimal behavioral change techniques. Results The needs assessment identified 13 gaps, each with one or more underlying determinant(s). Overall, these determinants were mapped to 9 of the 14 TDF domains. The Beliefs about Consequences domain was identified as a contributing determinant to 7 of the 13 challenges. Five of the gaps could be related to the Skills domain, while three were linked to the Knowledge domain. Conclusions The TDF categorization of the needs assessment findings allowed recommendation of appropriate behavior change techniques for each underlying determinant, and facilitated communication and understanding of the identified issues to a broader audience. This approach provides a means for health education researchers to categorize gaps and challenges identified through educational needs assessments, and facilitates the application of these findings by educators and knowledge translators, by linking the gaps to recommended behavioral change techniques. PMID:25060235

2014-01-01

91

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

92

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

93

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

94

Towards a theoretical basis for students' alternative frameworks in science and for science teaching  

Microsoft Academic Search

As there is nothing as practical as a good theory, there is a continuing need in the field of science education enquiry to look for theories which help to interpret the findings about students' alternative frameworks and to inform the design of teaching strategies which relate to a research focus on `how the student learns'. The developmental model of cognitive

Brian L. Jones; Kevin F. Collis; Jane M. Watson

1993-01-01

95

From Traditional to Constructivist Epistemologies: A Proposed Theoretical Framework Based on Activity Theory for Learning Communities  

ERIC Educational Resources Information Center

This article is concerned with how learning communities are transformed as they evolve from traditional learning epistemologies towards constructivist orientations and pedagogies. Adopting activity theory as a framework, the article discusses how transformations take place through a two-way process of appropriation (learning from one another as a…

Hung, David; Tan, Seng-Chee; Koh, Thiam-Seng

2006-01-01

96

THEORETICAL FRAMEWORK FOR COUPLING OF NON LOCAL DAMAGE AND VISCOPLASTICITY FOR DYNAMIC LOCALIZATION PROBLEMS  

Microsoft Academic Search

Conventional continuum mechanics models of inelastic deformation processes are size scale independent. In contrast, there is considerable experimental evidence that inelastic flow in crystalline materials is size- dependent. At present there is no generally accepted framework for analyzing the size-dependent response of an inelastically deforming material. This is due to the fact that very limited quantitative numerical comparisons with experimental

G. Z. Voyiadjis; R. K. Abu Al-Rub

97

Evaluation of traffic safety, based on micro-level behavioural data: Theoretical framework and first implementation  

Microsoft Academic Search

A traffic encounter between individual road users is a process of continuous interplay over time and space and may be seen as an elementary event with the potential to develop into an accident. This paper proposes a framework for organising all traffic encounters into a severity hierarchy based on some operational severity measure. A severity hierarchy provides a description of

Aliaksei Laureshyn; Åse Svensson; Christer Hydén

2010-01-01

98

A Game Theoretic Framework of SLA-Based Resource Allocation for Competitive Cloud Service Providers  

E-print Network

California Los Angeles, CA, USA {yanzhiwa, xuelin, pedram}@usc.edu Abstract--Cloud computing is an emerging. Resource allocation is one of the most important challenges in the cloud computing system, especially when provisioning framework for the CSPs. Keywords--cloud computing; cloud service provider; request dispatching

Pedram, Massoud

99

A validation study of the leadership styles of a holistic leadership theoretical framework  

Microsoft Academic Search

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 countries. This paper seeks to address this issue. Design\\/methodology\\/approach – In its methodological

Stefan Brauckmann; Petros Pashiardis

2011-01-01

100

Websites that Satisfy Users: A Theoretical Framework for Web User Interface Design and Evaluation  

Microsoft Academic Search

With the fast development and increasing use of the World Wide Web as both an information seeking and an electronic commerce tool, web usability studies grow in importance. While web designers have largely focused on functional aspects of websites, there has been little systematic attention to (1) the motivational issues of web user interface design or (2) a theoretically driven

Ping Zhang; Ruth V. Small; Gisela M. Von Dran; Silvia Barcellos

1999-01-01

101

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

102

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

103

Teachers' Stances on Cell Phones in the ESL Classroom: Toward a "Theoretical" Framework  

ERIC Educational Resources Information Center

In the ongoing and constantly expanding discussion surrounding cell phones in the classroom, a theoretical complement to the practical side of the issue is generally lacking. This is perhaps understandable. Many teachers are still trying to deal with the simple presence of cell phones in the class, and managing a classroom in which the presence…

Brown, Jeff

2014-01-01

104

Game Object Model Version II: A Theoretical Framework for Educational Game Development  

ERIC Educational Resources Information Center

Complex computer and video games may provide a vehicle, based on appropriate theoretical concepts, to transform the educational landscape. Building on the original game object model (GOM) a new more detailed model is developed to support concepts that educational computer games should: be relevant, explorative, emotive, engaging, and include…

Amory, Alan

2007-01-01

105

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

106

Practice through Partnership: Examining the Theoretical Framework and Development of a "Community of Musical Practice"  

ERIC Educational Resources Information Center

This article examines the development of a "community of musical practice" (CoMP) which emerged within a research case study in Limerick, Ireland. The case study was a music education partnership between a third level institution, a resource agency and a primary school. Using a "community of practice" (CoP) theoretical

Kenny, Ailbhe

2014-01-01

107

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

PubMed

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

2014-10-01

108

Towards a theoretical basis for students' alternative frameworks in science and for science teaching  

Microsoft Academic Search

As there is nothing as practical as a good theory, there is a continuing need in the field of science education enquiry to\\u000a look for theories which help to interpret the findings about students' alternative frameworks and to inform the design of\\u000a teaching strategies which relate to a research focus on ‘how the student learns’. The developmental model of cognitive

Brian L. Jones; Kevin F. Collis; Jane M. Watson

1993-01-01

109

Charging station selection optimization for plug-in electric vehicles: An oligopolistic game-theoretic framework  

Microsoft Academic Search

In this paper, we describe a framework for the selection of the best charging station when plug-in electric vehicles (PEV) need to recharge their batteries, while at the same time the power utilities, which own the charging stations (CS), optimize their revenue. We use two-way communication to transmit positioning information, which is a key factor so that the plug-in electric

J. Joaquin Escudero-Garzas; Gonzalo Seco-Granados

2012-01-01

110

The theoretical underpinnings of customer asset management: A framework and propositions for future research  

Microsoft Academic Search

Most research in customer asset management has focused on specific aspects of the value of the customer to the company. The\\u000a purpose of this article is to propose an integrated framework, called CUSAMS (customer asset management of services), that\\u000a enables service organizations (1) to make a comprehensive assessment of the value of their customer assets and (2) to understand\\u000a the

Ruth N. Bolton; Katherine N. Lemon; Peter C. Verhoef

2004-01-01

111

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

112

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

113

Theory of mind and paranoia in schizophrenia: A game theoretical investigation framework  

Microsoft Academic Search

Introduction. Ample evidence already shows that theory of mind (ToM) is impaired in people with schizophrenia. Our aim was to critically review this literature.Method. We completed a selected review of the research literature on ToM in schizophrenia.Results. Gaps in ToM research were identified. A specific relationship between impaired ToM and paranoid delusions, although intuitively reasonable from a theoretical basis, has

Kevin K. S. Chan; Eric Y. H. Chen

2011-01-01

114

An examination of physical education teacher motivation from a self-determination theoretical framework  

Microsoft Academic Search

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: autonomy, competence, and relatedness. Scholars of SDT also contend that individual characteristics and contextual features can

Russell L. Carson; Melissa A. Chase

2009-01-01

115

On the presence of electric currents in the solar atmosphere. I - A theoretical framework  

NASA Technical Reports Server (NTRS)

The general magnetic field above the solar photosphere is divided by an elementary analysis based on Ampere's law into two parts: a potential field due to electric currents below the photosphere and a field produced by electric currents above the photosphere combined with the induced mirror currents. The latter, by symmetry, has a set of field lines lying in the plane taken to be the photosphere which may be constructed from given vector magnetograph measurements. These field lines also represent all the information on the electric currents above the photosphere that a magnetograph can provide. Theoretical illustrations are given, and implications for data analysis are discussed.

Hagyard, M.; Low, B. C.; Tandberg-Hanssen, E.

1981-01-01

116

A theoretical framework to study potassium utilization efficiency in response to withdrawal of potassium.  

PubMed

An important objective of plant research is to improve the efficiency in the utilization of major nutrients, particularly nitrogen, phosphorus, and potassium. Several definitions of internal nutrient utilization efficiency (NUE) have been proposed, but the theoretical consistence of their use has been poorly explored. Here, a non-mechanistic approach was developed to theoretically examine the dynamics of commonly used NUE indicators following complete potassium deprivation. This approach was used to study the sensitivity of NUE indicators to changes in the actual NUE (NUEa) of K(+) in virtual plants. Three empirically based models that differ in the relationship between NUE and the internal K(+) concentration were examined. Frequently used indicators (potassium use efficiency, utilization efficiency, physiological efficiency, and nutrient productivity) and two additional ones introduced here (accumulated productivity and physiological ratio) differed in their capacity to reflect differences in NUEa. They also exhibited large disparities in their temporal variation and in their responsiveness to the concentration of K(+) before the beginning of the deprivation period. According to this analysis, the simultaneous use of several indicators could help to refine plant breeding for high NUE. The data also suggest that a trade off between plant productivity and the time necessary to reduce the concentration of K(+) by half is inherent to the dynamics of plant systems. Finally, it is proposed that for some plant species selection for high NUEa would not always be in conflict with selection for improved relative plant performance in low K(+) environments. PMID:23963671

Moriconi, Jorge I; Santa-María, Guillermo E

2013-11-01

117

Developing a Framework for Distributed and Dynamic Data Sharing Among the Coastal Ocean Community: Gulf of Maine Spatial Data Project and the Open IOOS Portal  

Microsoft Academic Search

In the past year the Gulf of Maine Ocean Observing System (GoMOOS), the Southeastern Universities Research Association (SURA) and DM Solutions Group worked with multiple government, academic and private industry partners to develop regional and national distributed data-sharing frameworks for the coastal ocean community. These projects were initiated by a joint FGDC and GeoConnections grant for the Gulf of Maine

P. Bogden; T. Shyka; D. McIlhagga

2005-01-01

118

Evaluation of traffic safety, based on micro-level behavioural data: theoretical framework and first implementation.  

PubMed

A traffic encounter between individual road users is a process of continuous interplay over time and space and may be seen as an elementary event with the potential to develop into an accident. This paper proposes a framework for organising all traffic encounters into a severity hierarchy based on some operational severity measure. A severity hierarchy provides a description of the safety situation and trade-off between safety and efficiency in the traffic system. As a first approach to study the encounter process, a set of indicators is proposed to describe an encounter. These indicators allow for a continuous description even if the relationship between the road users changes during the process (e.g., when they are on a collision course or leave it). Automated video analysis is suggested as a tool that will allow data collection for validation of the proposed theories. PMID:20728612

Laureshyn, Aliaksei; Svensson, Ase; Hydén, Christer

2010-11-01

119

Emotional Intelligence: A Theoretical Framework for Individual Differences in Affective Forecasting  

PubMed Central

Only recently have researchers begun to examine individual differences in affective forecasting. The present investigation was designed to make a theoretical contribution to this emerging literature by examining the role of emotional intelligence in affective forecasting. Emotional intelligence was hypothesized to be associated with affective forecasting accuracy, memory for emotional reactions, and subsequent improvement on an affective forecasting task involving emotionally-evocative pictures. Results from two studies (N = 511) supported our hypotheses. Emotional intelligence was associated with accuracy in predicting, encoding, and consolidating emotional reactions. Furthermore, emotional intelligence was associated with greater improvement on a second affective forecasting task, with the relationship explained by basic memory processes. Implications for future research on basic and applied decision making are discussed. PMID:22251053

Hoerger, Michael; Chapman, Benjamin P.; Epstein, Ronald M.; Duberstein, Paul R.

2011-01-01

120

Responsive Feeding Is Embedded in a Theoretical Framework of Responsive Parenting123  

PubMed Central

Children throughout the world are confronted with growth problems ranging from underweight and stunting to overweight and obesity. The development of healthy eating behaviors depends on both healthy food and responsive parenting behaviors. With origins from anthropology, psychology, and nutrition, responsive parenting reflects reciprocity between child and caregiver, conceptualized as a 4-step mutually responsive process: 1) the caregiver creates a routine, structure, expectations, and emotional context that promote interaction; 2) the child responds and signals to the caregiver; 3) the caregiver responds promptly in a manner that is emotionally supportive, contingent, and developmentally appropriate; and 4) the child experiences predictable responses. This paper examines evidence for the practice and developmental benefits of responsive parenting with a view to providing a theoretical basis for responsive feeding. Recommendations are made that future efforts to promote healthy growth and to prevent underweight and overweight among young children incorporate and evaluate responsive feeding. PMID:21270366

Black, Maureen M.; Aboud, Frances E.

2011-01-01

121

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

122

A Framework for Determining the Maximum Theoretical Power Output for a Given Vibration Energy  

NASA Astrophysics Data System (ADS)

This paper outlines a mathematical framework to determine the upper bound on extractable power as a function of the forcing vibrations. In addition to determining the upper bound on power output, the method described provides insight into the dynamic transducer forces required to attain the upper bound. This relationship, between input vibration parameters and transducer force gives a critical first step in determining the optimal transducer architecture for a given vibration input. The method developed is applied to two specific vibration inputs; a single sinusoid, and the sum of two sinusoids. For the single sinusoidal case, the optimal transducer force is found to be that produced by a linear spring, resonant with the input frequency, and a linear viscous damper, with matched impedance to the mechanical damper. The solution to this first case was previously known, but has been used here to validate the methodology. The resulting transducer force for the input described by a sum of two sinusoids is found to be inherently time dependent. This time dependency shows that an active system can outperform a passive system. Furthermore, the upper bound on power output is shown to be twice that obtainable from a linear harvester centred at the lower of the two frequencies.

Heit, J.; Roundy, S.

2014-11-01

123

[Marxism as a theoretical and methodological framework in collective health: implications for systematic review and synthesis of evidence].  

PubMed

In this study, we discuss the integration in systematic reviews of research developed from a Marxist perspective of knowledge production and their results as evidence in healthcare. The study objectives are to review the assumptions of dialectical and historical materialism (DHM) and discuss the implications of dialectics for a literature review and the synthesis of evidence. DHM is a powerful framework for knowledge generation and transformation of policies and practices in healthcare. It assumes that social contradictions underlie the health-disease process, the fundamental theoretical construction in the field of collective health. Currently, we observe a considerable influence of the critical paradigm, of Marxist origin, in the construction of knowledge in health. Studies based on this critical paradigm incorporate complex methods, which are inherent to the guidelines of dialect, to identify the object and arrive at results that constitute evidence in healthcare. Systematic reviews should address the methodological difficulties associated with entirely integrating these results to healthcare. PMID:24626368

Soares, Cassia Baldini; Campos, Celia Maria Sivalli; Yonekura, Tatiana

2013-12-01

124

A Theoretical Framework for Understanding Neuromuscular Response to Lower Extremity Joint Injury  

PubMed Central

Background: Neuromuscular alterations are common following lower extremity joint injury and often lead to decreased function and disability. These neuromuscular alterations manifest in inhibition or abnormal facilitation of the uninjured musculature surrounding an injured joint. Unfortunately, these neural alterations are poorly understood, which may affect clinical recognition and treatment of these injuries. Understanding how these neural alterations affect physical function may be important for proper clinical management of lower extremity joint injuries. Methods: Pertinent articles focusing on neuromuscular consequences and treatment of knee and ankle injuries were collected from peer-reviewed sources available on the Web of Science and Medline databases from 1975 through 2010. A theoretical model to illustrate potential relationships between neural alterations and clinical impairments was constructed from the current literature. Results: Lower extremity joint injury affects upstream cortical and spinal reflexive excitability pathways as well as downstream muscle function and overall physical performance. Treatment targeting the central nervous system provides an alternate means of treating joint injury that may be effective for patients with neuromuscular alterations. Conclusions: Disability is common following joint injury. There is mounting evidence that alterations in the central nervous system may relate to clinical changes in biomechanics that may predispose patients to further injury, and novel clinical interventions that target neural alterations may improve therapeutic outcomes. PMID:23016066

Pietrosimone, Brian G.; McLeod, Michelle M.; Lepley, Adam S.

2012-01-01

125

A theoretical framework for evaluating analytical digestion methods for poorly soluble particulate beryllium.  

PubMed

Complete digestion of all chemical forms and sizes of particulate analytes in environmental samples is usually necessary to obtain accurate results with atomic spectroscopy. In the current study, we investigate the physicochemical properties of beryllium particles likely to be encountered in samples collected from different occupational environments and present a hypothesis that a dissolution theory can be used as a conceptual framework to guide development of strategies for digestion procedures. For monodisperse single-chemical constituent primary particles, such as those encountered when handling some types of beryllium oxide (BeO) powder, theory predicts that a digestion procedure is sufficient when it completely dissolves all primary particles, independent of cluster size. For polydisperse single-chemical constituent particles, such as those encountered during the handling of some types of beryllium metal powder, theory predicts that a digestion procedure is sufficient only when it completely dissolves the largest particle in the sample. For samples with unknown or multi-chemical constituent particles and with particles having undefined sizes, e.g., fume emissions from a copper-beryllium alloy furnace operation or dust from a beryl ore crushing operation, a surface area-limited and single-constituent-dependent dissolution theory may not predict complete dissolution, thereby requiring non-routine robust treatment procedures with post-digestion filtration, followed by examination of residual particulate material. Additionally, for beryllium, and likely other poorly soluble materials, particulate reference materials of various chemical forms and size distributions are needed to better evaluate and harmonize analytical digestion procedures. Figure Generation of aerosol particles during machining of beryllium oxide. PMID:17124574

Stefaniak, Aleksandr B; Brink, Christopher A; Dickerson, Robert M; Day, Gregory A; Brisson, Michael J; Hoover, Mark D; Scripsick, Ronald C

2007-04-01

126

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

127

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

128

Theoretical framework of population genetics with somatic mutations taken into account: application to copy number variations in humans  

PubMed Central

Traditionally, population genetics focuses on the dynamics of frequencies of alleles acquired by mutations on germ-lines, because only such mutations are heritable. Typical genotyping experiments, however, use DNA from some somatic tissues such as blood, which harbors somatic mutations at the current generation in addition to germ-line mutations accumulated since the most recent common ancestor of the sample. This common practice may sometimes cause erroneous interpretations of polymorphism data, unless we properly understand the role of somatic mutations in population genetics. We here introduce a very basic theoretical framework of population genetics with somatic mutations taken into account. It is easy to imagine that somatic mutations at the current generation simply add individual-specific variations, as errors in mutation detection do. Our theory quantifies this increment under various conditions. We find that the major contribution of somatic mutations plus errors is to very rare variants, particularly to singletons. The relative contribution is markedly large when mutations are deleterious. Because negative selection also increases rare variants, it is important to distinguish the roles of these mutually confounding factors when we interpret the data, even after correcting for demography. We apply this theory to human copy number variations (CNVs), for which the composite effect of somatic mutations and errors may not be negligible. Using genome-wide CNV data, we demonstrate how the joint action of the two factors, selection and somatic mutations plus errors, shapes the observed pattern of polymorphism. PMID:23981956

Ezawa, K; Innan, H

2013-01-01

129

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

130

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

131

A direct vulnerable atherosclerotic plaque elasticity reconstruction method based on an original material-finite element formulation: theoretical framework  

NASA Astrophysics Data System (ADS)

The peak cap stress (PCS) amplitude is recognized as a biomechanical predictor of vulnerable plaque (VP) rupture. However, quantifying PCS in vivo remains a challenge since the stress depends on the plaque mechanical properties. In response, an iterative material finite element (FE) elasticity reconstruction method using strain measurements has been implemented for the solution of these inverse problems. Although this approach could resolve the mechanical characterization of VPs, it suffers from major limitations since (i) it is not adapted to characterize VPs exhibiting high material discontinuities between inclusions, and (ii) does not permit real time elasticity reconstruction for clinical use. The present theoretical study was therefore designed to develop a direct material-FE algorithm for elasticity reconstruction problems which accounts for material heterogeneities. We originally modified and adapted the extended FE method (Xfem), used mainly in crack analysis, to model material heterogeneities. This new algorithm was successfully applied to six coronary lesions of patients imaged in vivo with intravascular ultrasound. The results demonstrated that the mean relative absolute errors of the reconstructed Young's moduli obtained for the arterial wall, fibrosis, necrotic core, and calcified regions of the VPs decreased from 95.3±15.56%, 98.85±72.42%, 103.29±111.86% and 95.3±10.49%, respectively, to values smaller than 2.6 × 10-8±5.7 × 10-8% (i.e. close to the exact solutions) when including modified-Xfem method into our direct elasticity reconstruction method.

Bouvier, Adeline; Deleaval, Flavien; Doyley, Marvin M.; Yazdani, Saami K.; Finet, Gérard; Le Floc'h, Simon; Cloutier, Guy; Pettigrew, Roderic I.; Ohayon, Jacques

2013-12-01

132

Assessing Students' Understandings of Biological Models and Their Use in Science to Evaluate a Theoretical Framework  

ERIC Educational Resources Information Center

Research in the field of students' understandings of models and their use in science describes different frameworks concerning these understandings. Currently, there is no conjoint framework that combines these structures and so far, no investigation has focused on whether it reflects students' understandings sufficiently (empirical…

Grünkorn, Juliane; Upmeier zu Belzen, Annette; Krüger, Dirk

2014-01-01

133

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

134

Assessing Learning in the Outdoors with the Field Trip in Natural Environments (FiNE) Framework  

ERIC Educational Resources Information Center

The development and application of a framework that captures main characteristics of learning in nature--the Field Trip in Natural Environments (FiNE) framework--is the main outcome of this study that followed up 22 daily field trips of 4-6th grade students to nature parks. The theoretical and practical framework, which was developed based on the…

Morag, Orly; Tal, Tali

2012-01-01

135

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

136

Gender Dynamics in Homeownership: A Gender System and Contract Theoretical Framework For Analysing Gender Inequality in Homeownership in Urban Uganda  

Microsoft Academic Search

This paper presents Hirdman's gender system and contract theory to examine the unequal gender relations in homeownership in an urban Ugandan partriarchal society. The theoretical point of departure is that married women are usually in the subordinate position in homeownership. For married women to become homeowners in a patriarchal society, it is an uphill task. Special conditions that include: a

Florence Akiiki ASIIMWE

137

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

Microsoft Academic Search

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=29.2 GPa and c12=13.1 GPa for Zn-based MOF 5. However, we find c44 of MOF-5 to be exceedingly

Amit Samanta; Terumi Furuta; Ju Li

2006-01-01

138

Hierarchical representations of the five-factor model of personality in predicting job performance: integrating three organizing frameworks with two theoretical perspectives.  

PubMed

Integrating 2 theoretical perspectives on predictor-criterion relationships, the present study developed and tested a hierarchical framework in which each five-factor model (FFM) personality trait comprises 2 DeYoung, Quilty, and Peterson (2007) facets, which in turn comprise 6 Costa and McCrae (1992) NEO facets. Both theoretical perspectives-the bandwidth-fidelity dilemma and construct correspondence-suggest that lower order traits would better predict facets of job performance (task performance and contextual performance). They differ, however, as to the relative merits of broad and narrow traits in predicting a broad criterion (overall job performance). We first meta-analyzed the relationship of the 30 NEO facets to overall job performance and its facets. Overall, 1,176 correlations from 410 independent samples (combined N = 406,029) were coded and meta-analyzed. We then formed the 10 DeYoung et al. facets from the NEO facets, and 5 broad traits from those facets. Overall, results provided support for the 6-2-1 framework in general and the importance of the NEO facets in particular. PMID:24016206

Judge, Timothy A; Rodell, Jessica B; Klinger, Ryan L; Simon, Lauren S; Crawford, Eean R

2013-11-01

139

Understanding practice: the factors that influence management of mild traumatic brain injury in the emergency department-a qualitative study using the Theoretical Domains Framework  

PubMed Central

Background Mild traumatic brain injury is a frequent cause of presentation to emergency departments. Despite the availability of clinical practice guidelines in this area, there is variation in practice. One of the aims of the Neurotrauma Evidence Translation program is to develop and evaluate a targeted, theory- and evidence-informed intervention to improve the management of mild traumatic brain injury in Australian emergency departments. This study is the first step in the intervention development process and uses the Theoretical Domains Framework to explore the factors perceived to influence the uptake of four key evidence-based recommended practices for managing mild traumatic brain injury. Methods Semi-structured interviews were conducted with emergency staff in the Australian state of Victoria. The interview guide was developed using the Theoretical Domains Framework to explore current practice and to identify the factors perceived to influence practice. Two researchers coded the interview transcripts using thematic content analysis. Results A total of 42 participants (9 Directors, 20 doctors and 13 nurses) were interviewed over a seven-month period. The results suggested that (i) the prospective assessment of post-traumatic amnesia was influenced by: knowledge; beliefs about consequences; environmental context and resources; skills; social/professional role and identity; and beliefs about capabilities; (ii) the use of guideline-developed criteria or decision rules to inform the appropriate use of a CT scan was influenced by: knowledge; beliefs about consequences; environmental context and resources; memory, attention and decision processes; beliefs about capabilities; social influences; skills and behavioral regulation; (iii) providing verbal and written patient information on discharge was influenced by: beliefs about consequences; environmental context and resources; memory, attention and decision processes; social/professional role and identity; and knowledge; (iv) the practice of providing brief, routine follow-up on discharge was influenced by: environmental context and resources; social/professional role and identity; knowledge; beliefs about consequences; and motivation and goals. Conclusions Using the Theoretical Domains Framework, factors thought to influence the management of mild traumatic brain injury in the emergency department were identified. These factors present theoretically based targets for a future intervention. PMID:24418161

2014-01-01

140

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

141

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

142

A theoretical framework to model DSC-MRI data acquired in the presence of contrast agent extravasation  

NASA Astrophysics Data System (ADS)

Dynamic susceptibility contrast (DSC) MRI methods rely on compartmentalization of the contrast agent such that a susceptibility gradient can be induced between the contrast-containing compartment and adjacent spaces, such as between intravascular and extravascular spaces. When there is a disruption of the blood-brain barrier, as is frequently the case with brain tumors, a contrast agent leaks out of the vasculature, resulting in additional T1, T2 and T*2 relaxation effects in the extravascular space, thereby affecting the signal intensity time course and reducing the reliability of the computed hemodynamic parameters. In this study, a theoretical model describing these dynamic intra- and extravascular T1, T2 and T*2 relaxation interactions is proposed. The applicability of using the proposed model to investigate the influence of relevant MRI pulse sequences (e.g. echo time, flip angle), and physical (e.g. susceptibility calibration factors, pre-contrast relaxation rates) and physiological parameters (e.g. permeability, blood flow, compartmental volume fractions) on DSC-MRI signal time curves is demonstrated. Such a model could yield important insights into the biophysical basis of contrast-agent-extravasastion-induced effects on measured DSC-MRI signals and provide a means to investigate pulse sequence optimization and appropriate data analysis methods for the extraction of physiologically relevant imaging metrics.

Quarles, C. C.; Gochberg, D. F.; Gore, J. C.; Yankeelov, T. E.

2009-10-01

143

Theoretical study of molecular hydrogen and spiltover hydrogen storage on two-dimensional covalent-organic frameworks  

NASA Astrophysics Data System (ADS)

Molecular hydrogen and spiltover hydrogen storages on five two-dimensional (2D) covalent-organic frameworks (COFs) (PPy-COF, TP-COF, BTP-COF, COF-18 Å, and HHTP-DPB COF) are investigated using the grand canonical Monte Carlo (GCMC) simulations and the density functional theory (DFT), respectively. The GCMC simulated results show that HHTP-DPB COF has the best performance for hydrogen storage, followed by BTP-COF, TP-COF, COF-18 Å, and PPy-COF. However, their adsorption amounts at room temperature are all too low to meet the uptake target set by US Department of Energy (US-DOE) and enable practical applications. The effects of pore size, surface area, and isosteric heat of hydrogen on adsorption amount are considered, which indicate that these three factors are all the important factors for determining the H2 adsorption amount. The chemisorptions of spiltover hydrogen atoms on these five COFs represented by the cluster models are investigated using the DFT method. The saturation cluster models are constructed by considering all possible adsorption sites for these cluster models. The average binding energy of a hydrogen atom and the saturation hydrogen storage density are calculated. The large average binding energy indicates that the spillover process may proceed smoothly and reversibly. The saturation hydrogen storage density is much larger than the physisorption uptake of H2 molecules at 298 K and 100 bar (1 bar = 105 Pa), and is close to or exceeds the 2010 US-DOE target of 6 wt% for hydrogen storage. This suggests that the hydrogen storage capacities of these COFs by spillover may be significantly enhanced. Thus 2D COFs studied in this paper are suitable hydrogen storage media by spillover.

Liu, Xiu-Ying; He, Jie; Yu, Jing-Xin; Li, Zheng-Xin; Fan, Zhi-Qin

2014-06-01

144

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

145

A novel theoretical framework for the dynamic stability analysis, movement control, and trajectory generation in a multisegment biomechanical model.  

PubMed

We consider a simplified characterization of the postural control system that embraces two broad components: one representing the musculoskeletal dynamics in the sagittal plane and the other representing proprioceptive feedback and the central nervous system (CNS). Specifically, a planar four-segment neuromusculoskeletal model consisting of the ankle, knee, and hip degrees-of-freedom (DOFs) is described in this paper. The model includes important physiological constructs such as Hill-type muscle model, active and passive muscle stiffnesses, force feedback from the Golgi tendon organ, muscle length and rate feedback from the muscle spindle, and transmission latencies in the neural pathways. A proportional-integral-derivative (PID) controller for each individual DOF is assumed to represent the CNS analog in the modeling paradigm. Our main hypothesis states that all stabilizing PID controllers for such multisegment biomechanical models can be parametrized and analytically synthesized. Our analytical and simulation results show that the proposed representation adequately shapes a postural control that (a) possesses good disturbance rejection and trajectory tracking, (b) is robust against feedback latencies and torque perturbations, and (c) is flexible to embrace changes in the musculoskeletal parameters. We additionally present detailed sensitivity analysis to show that control under conditions of limited or no proprioceptive feedback results in (a) significant reduction in the stability margins, (b) substantial decrease in the available stabilizing parameter set, and (c) oscillatory movement trajectories. Overall, these results suggest that anatomical arrangement, active muscle stiffness, force feedback, and physiological latencies play a major role in shaping motor control processes in humans. PMID:19045918

Iqbal, Kamran; Roy, Anindo

2009-01-01

146

Fundamental relationship between the noise properties of grating-based differential phase contrast CT and absorption CT: Theoretical framework using a cascaded system model and experimental validation  

PubMed Central

Purpose: Using a grating interferometer, a conventional x-ray cone beam computed tomography (CT) data acquisition system can be used to simultaneously generate both conventional absorption CT (ACT) and differential phase contrast CT (DPC-CT) images from a single data acquisition. Since the two CT images were extracted from the same set of x-ray projections, it is expected that intrinsic relationships exist between the noise properties of the two contrast mechanisms. The purpose of this paper is to investigate these relationships. Methods: First, a theoretical framework was developed using a cascaded system model analysis to investigate the relationship between the noise power spectra (NPS) of DPC-CT and ACT. Based on the derived analytical expressions of the NPS, the relationship between the spatial-frequency-dependent noise equivalent quanta (NEQ) of DPC-CT and ACT was derived. From these fundamental relationships, the NPS and NEQ of the DPC-CT system can be derived from the corresponding ACT system or vice versa. To validate these theoretical relationships, a benchtop cone beam DPC-CT/ACT system was used to experimentally measure the modulation transfer function (MTF) and NPS of both DPC-CT and ACT. The measured three-dimensional (3D) MTF and NPS were then combined to generate the corresponding 3D NEQ. Results: Two fundamental relationships have been theoretically derived and experimentally validated for the NPS and NEQ of DPC-CT and ACT: (1) the 3D NPS of DPC-CT is quantitatively related to the corresponding 3D NPS of ACT by an inplane-only spatial-frequency-dependent factor 1/f?2, the ratio of window functions applied to DPC-CT and ACT, and a numerical factor Cg determined by the geometry and efficiency of the grating interferometer. Note that the frequency-dependent factor is independent of the frequency component fz perpendicular to the axial plane. (2) The 3D NEQ of DPC-CT is related to the corresponding 3D NEQ of ACT by an f?2 scaling factor and numerical factors that depend on both the attenuation and refraction properties of the image object, as well as Cg and the MTF of the grating interferometer. Conclusions: The performance of a DPC-CT system is intrinsically related to the corresponding ACT system. As long as the NPS and NEQ of an ACT system is known, the corresponding NPS and NEQ of the DPC-CT system can be readily estimated using additional characteristics of the grating interferometer. PMID:23387756

Li, Ke; Bevins, Nicholas; Zambelli, Joseph; Chen, Guang-Hong

2013-01-01

147

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

148

[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

149

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

150

Identifying factors likely to influence compliance with diagnostic imaging guideline recommendations for spine disorders among chiropractors in North America: a focus group study using the Theoretical Domains Framework  

PubMed Central

Background The Theoretical Domains Framework (TDF) was developed to investigate determinants of specific clinical behaviors and inform the design of interventions to change professional behavior. This framework was used to explore the beliefs of chiropractors in an American Provider Network and two Canadian provinces about their adherence to evidence-based recommendations for spine radiography for uncomplicated back pain. The primary objective of the study was to identify chiropractors’ beliefs about managing uncomplicated back pain without x-rays and to explore barriers and facilitators to implementing evidence-based recommendations on lumbar spine x-rays. A secondary objective was to compare chiropractors in the United States and Canada on their beliefs regarding the use of spine x-rays. Methods Six focus groups exploring beliefs about managing back pain without x-rays were conducted with a purposive sample. The interview guide was based upon the TDF. Focus groups were digitally recorded, transcribed verbatim, and analyzed by two independent assessors using thematic content analysis based on the TDF. Results Five domains were identified as likely relevant. Key beliefs within these domains included the following: conflicting comments about the potential consequences of not ordering x-rays (risk of missing a pathology, avoiding adverse treatment effects, risks of litigation, determining the treatment plan, and using x-ray-driven techniques contrasted with perceived benefits of minimizing patient radiation exposure and reducing costs; beliefs about consequences); beliefs regarding professional autonomy, professional credibility, lack of standardization, and agreement with guidelines widely varied ( social/professional role & identity); the influence of formal training, colleagues, and patients also appeared to be important factors ( social influences); conflicting comments regarding levels of confidence and comfort in managing patients without x-rays ( belief about capabilities); and guideline awareness and agreements ( knowledge). Conclusions Chiropractors’ use of diagnostic imaging appears to be influenced by a number of factors. Five key domains may be important considering the presence of conflicting beliefs, evidence of strong beliefs likely to impact the behavior of interest, and high frequency of beliefs. The results will inform the development of a theory-based survey to help identify potential targets for behavioral-change strategies. PMID:22938135

2012-01-01

151

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

152

A quantitative synthesis of the medicinal ethnobotany of the Malinké of Mali and the Asháninka of Peru, with a new theoretical framework  

PubMed Central

Background Although ethnomedically and taxonomically guided searches for new medicinal plants can improve the percentage of plants found containing active compounds when compared to random sampling, ethnobotany has fulfilled little of its promise in the last few decades to deliver a bounty of new, laboratory-proven medicinal plants and compounds. It is quite difficult to test, isolate, and elucidate the structure and mechanism of compounds from the plethora of new medicinal plant uses described each year with limited laboratory time and resources and the high cost of clinical trials of new drug candidates. Methods A new quantitative theoretical framework of mathematical formulas called "relational efficacy" is proposed that should narrow down this search for new plant-derived medicines based on the hypothesis that closely related plants used to treat closely related diseases in distantly related cultures have a higher probability of being effective because they are more likely to be independent discoveries of similar plant compounds and disease mechanisms. A prerequisite to this hypothesis, the idea that empirical testing in traditional medicine will lead to choosing similar medicinal plants and therefore the medicinal flora of two distant cultures will prove to be more similar than their general flora, is tested using resampling statistics on cross-cultural field data of the plants used by the Malinké of Mali and the Asháninka of Peru to treat the diseases malaria, African sleeping sickness, Chagas' disease, leishmaniasis, diabetes, eczema, asthma, and uterine fibroids. Results In this case, the similarity of the medicinal floras is found to be significantly greater than the similarity of the general floras, but only when the diseases in question are grouped into the categories of parasitic and autoimmune diseases. Conclusion If the central theoretical framework of this hypothesis is shown to be true, it will allow the synthesis of medicinal plant information from around the world to pinpoint the species with the highest potential efficacy to take into the laboratory and analyze further, ultimately saving much field and laboratory time and resources. Spanish abstract Las búsquedas que utilizan la etnomedicina y la taxonomía para descubrir nuevas plantas medicinales, pueden aumentar la probabilidad de éxito de encontrar compuestos químicos activos en plantas, en comparación con las búsquedas aleatorias. A pesar de lo anterior, en las últimas décadas, la etnobotánica no ha cumplido con las expectativas de proveer numerosas plantas medicinales y químicos nuevos una vez examinados en el laboratorio. Cada año se describen una plétora de plantas medicinales y sus usos, sin embargo las limitaciones de tiempo y recursos en los laboratorios, unidos al alto coste de los ensayos clínicos de las drogas potenciales, hacen muy difícil probar, aislar, y elucidar la estructura y el mecanismo de los compuestos de estas plantas. Se propone un nuevo marco teórico cuantitativo cuyo fin es focalizar la búsqueda de nueva plantas medicinales. Este marco teórico está basado en la hipótesis que las plantas cercanamente relacionadas, usadas para tratar enfermedades cercanamente relacionadas en culturas distantemente relacionadas, tienen una eficacia potencial más alta, debido a que es más probable que estos hallazgos sean descubrimientos independientes de compuestos químicos similares. Parte de esta hipótesis, que las escogencias racionales se hacen para elegir plantas medicinales similares y que la flora medicinal de dos culturas distantes es más similar que su flora general, se probó usando métodos estadísticos de remuestreo con datos de campo de la comunidad Malinké de Malí y de la Asháninka de Perú, y las enfermedades de paludismo, enfermedad africana del sueño, enfermedad de Chagas, leishmania, diabetes, eczema, asma, y fibromas uterinos. Se encontró, en este caso, que

Bletter, Nathaniel

2007-01-01

153

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

154

Polymorphism of metal-organic frameworks: direct comparison of structures and theoretical N?-uptake of topological pto- and tbo-isomers.  

PubMed

The syntheses, calculated surface areas and N2 uptakes of two highly augmented {Cu}2 'paddlewheel'-based MOFs provide a direct comparison of tbo and pto framework polymorphs with identical composition. PMID:24634915

Zhu, Nianyong; Lennox, Matthew J; Düren, Tina; Schmitt, Wolfgang

2014-04-25

155

Defining the Nature and Impact of Goals in Children and Adolescents with a Chronic Health Condition: A Review of Research and a Theoretical Framework  

Microsoft Academic Search

This paper presents a review of research related to goals in youth with a chronic health condition (CHC) and a related framework to inform theory and research. Performed literature review using PsychINFO and Medline with a combination of many key words related to health, goals, and youth. Sixteen studies related to goals in youth with a CHC were identified. An

Lisa Schwartz; Dennis Drotar

2006-01-01

156

Maine Ingredients  

ERIC Educational Resources Information Center

This article features Maine Learning Technology Initiative (MLTI), the nation's first-ever statewide 1-to-1 laptop program which marks its seventh birthday by expanding into high schools, providing an occasion to celebrate--and to examine the components of its success. The plan to put laptops into the hands of every teacher and student in grades 7…

Waters, John K.

2009-01-01

157

MAINE HYDROGRAPHY  

EPA Science Inventory

Hydronet_me24 and Hydropoly_me24 depict Maine's hydrography data, based on 8-digit hydrological unit codes (HUC's) at the 1:24,000 scale. Some New Hampshire and New Brunswick hydrography data are also included. The NHD hydrography data was compiled from previous ArcIn...

158

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...

159

A Framework to Implement Cross-Cultural Pedagogy: The Case of Implementing Learning Reform at Confucian Heritage Culture Colleges  

ERIC Educational Resources Information Center

This article proposes an applied theoretical framework that could assist education reformers in Confucian heritage culture (CHC) countries to adopt Western-developed learning practices successfully. This framework is needed because the literature has recently documented a large number of failures in educational reforms at CHC colleges. The main

Thanh, Pham Thi Hong

2012-01-01

160

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

161

A theoretical study of the hydrogen-storage potential of (H2)4CH4 in metal organic framework materials and carbon nanotubes  

NASA Astrophysics Data System (ADS)

The hydrogen-methane compound (H2)4CH4—or for short H4M—is one of the most promising hydrogen-storage materials. This van der Waals compound is extremely rich in molecular hydrogen: 33.3 mass%, not including the hydrogen bound in CH4; including it, we reach even 50.2 mass%. Unfortunately, H4M is not stable under ambient pressure and temperature, requiring either low temperature or high pressure. In this paper, we investigate the properties and structure of the molecular and crystalline forms of H4M, using ab initio methods based on van der Waals DFT (vdW-DF). We further investigate the possibility of creating the pressures required to stabilize H4M through external agents such as metal organic framework (MOF) materials and carbon nanotubes, with very encouraging results. In particular, we find that certain MOFs can create considerable pressure for H4M in their cavities, but not enough to stabilize it at room temperature, and moderate cooling is still necessary. On the other hand, we find that all the investigated carbon nanotubes can create the high pressures required for H4M to be stable at room temperature, with direct implications for new and exciting hydrogen-storage applications.

Li, Q.; Thonhauser, T.

2012-10-01

162

Main Report  

PubMed Central

Background: States vary widely in their use of newborn screening tests, with some mandating screening for as few as three conditions and others mandating as many as 43 conditions, including varying numbers of the 40+ conditions that can be detected by tandem mass spectrometry (MS/MS). There has been no national guidance on the best candidate conditions for newborn screening since the National Academy of Sciences report of 19751 and the United States Congress Office of Technology Assessment report of 1988,2 despite rapid developments since then in genetics, in screening technologies, and in some treatments. Objectives: In 2002, the Maternal and Child Health Bureau (MCHB) of the Health Resources and Services Administration (HRSA) of the United States Department of Health and Human Services (DHHS) commissioned the American College of Medical Genetics (ACMG) to: Conduct an analysis of the scientific literature on the effectiveness of newborn screening.Gather expert opinion to delineate the best evidence for screening for specified conditions and develop recommendations focused on newborn screening, including but not limited to the development of a uniform condition panel.Consider other components of the newborn screening system that are critical to achieving the expected outcomes in those screened. Methods: A group of experts in various areas of subspecialty medicine and primary care, health policy, law, public health, and consumers worked with a steering committee and several expert work groups, using a two-tiered approach to assess and rank conditions. A first step was developing a set of principles to guide the analysis. This was followed by developing criteria by which conditions could be evaluated, and then identifying the conditions to be evaluated. A large and broadly representative group of experts was asked to provide their opinions on the extent to which particular conditions met the selected criteria, relying on supporting evidence and references from the scientific literature. The criteria were distributed among three main categories for each condition: The availability and characteristics of the screening test;The availability and complexity of diagnostic services; andThe availability and efficacy of treatments related to the conditions. A survey process utilizing a data collection instrument was used to gather expert opinion on the conditions in the first tier of the assessment. The data collection format and survey provided the opportunity to quantify expert opinion and to obtain the views of a diverse set of interest groups (necessary due to the subjective nature of some of the criteria). Statistical analysis of data produced a score for each condition, which determined its ranking and initial placement in one of three categories (high scoring, moderately scoring, or low scoring/absence of a newborn screening test). In the second tier of these analyses, the evidence base related to each condition was assessed in depth (e.g., via systematic reviews of reference lists including MedLine, PubMed and others; books; Internet searches; professional guidelines; clinical evidence; and cost/economic evidence and modeling). The fact sheets reflecting these analyses were evaluated by at least two acknowledged experts for each condition. These experts assessed the data and the associated references related to each criterion and provided corrections where appropriate, assigned a value to the level of evidence and the quality of the studies that established the evidence base, and determined whether there were significant variances from the survey data. Survey results were subsequently realigned with the evidence obtained from the scientific literature during the second-tier analysis for all objective criteria, based on input from at least three acknowledged experts in each condition. The information from these two tiers of assessment was then considered with regard to the overriding principles and other technology or condition-specific recommendations. On the basis of this information, conditions were assigned to one of thr

2006-01-01

163

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

164

Interconnected Musical Networks: Toward a Theoretical Framework  

Microsoft Academic Search

This article attempts to define and classify the aes- thetic and technical principles of interconnected musical networks. It presents an historical overview of technological innovations that were instrumen- tal for the development of the field and discusses a number of paradigmatic musical networks that are based on these technologies. A classification of on- line and local-area musical networks then leads

Gil Weinberg

2005-01-01

165

Homeopathy. A theoretical framework and clinical application.  

PubMed

The use of homeopathic remedies for the treatment of mastitis is described. The basic principles of homeopathy are discussed, including the simillimum, the minimum dose, the single remedy, the whole person, the vital force, susceptibility, and constitutional treatment. Homeopathic research trials and papers are examined and discussed. The author explains how homeopathy can be incorporated into midwifery practice and applies this to the treatment of mastitis. Specific indications in the application of 19 homeopathic remedies for mastitis, breast abscess, and lactation difficulties (including problems with supply and painful nipples) are cited. Keynote symptoms are presented in an easy access repertory. General guidelines for potency and dosage protocol are given. PMID:10380446

Castro, M

1999-01-01

166

Theoretical Resource  

Microsoft Academic Search

This paper makes a contribution to the theory and practice of educational action research by introducing two theoretical and methodological resources as part of a personal review of sustained professional experience: ‘appreciative inquiry’ and the ‘enneagram’. It is more than a theoretical exercise, however, because it also constitutes an action?oriented reflection on the transitional nature of the author’s professional situation,

Tim Luckcock

2007-01-01

167

Decision support models for solid waste management: Review and game-theoretic approaches  

SciTech Connect

Highlights: ? The mainly used decision support frameworks for solid waste management are reviewed. ? The LCA, CBA and MCDM models are presented and their strengths, weaknesses, similarities and possible combinations are analyzed. ? The game-theoretic approach in a solid waste management context is presented. ? The waste management bargaining game is introduced as a specific decision support framework. ? Cooperative and non-cooperative game-theoretic approaches to decision support for solid waste management are discussed. - Abstract: This paper surveys decision support models that are commonly used in the solid waste management area. Most models are mainly developed within three decision support frameworks, which are the life-cycle assessment, the cost–benefit analysis and the multi-criteria decision-making. These frameworks are reviewed and their strengths and weaknesses as well as their critical issues are analyzed, while their possible combinations and extensions are also discussed. Furthermore, the paper presents how cooperative and non-cooperative game-theoretic approaches can be used for the purpose of modeling and analyzing decision-making in situations with multiple stakeholders. Specifically, since a waste management model is sustainable when considering not only environmental and economic but also social aspects, the waste management bargaining game is introduced as a specific decision support framework in which future models can be developed.

Karmperis, Athanasios C., E-mail: athkarmp@mail.ntua.gr [Sector of Industrial Management and Operational Research, School of Mechanical Engineering, National Technical University of Athens, Iroon Polytechniou 9, 15780 Athens (Greece); Army Corps of Engineers, Hellenic Army General Staff, Ministry of Defence (Greece); Aravossis, Konstantinos; Tatsiopoulos, Ilias P.; Sotirchos, Anastasios [Sector of Industrial Management and Operational Research, School of Mechanical Engineering, National Technical University of Athens, Iroon Polytechniou 9, 15780 Athens (Greece)

2013-05-15

168

Institute for Theoretical Physics  

SciTech Connect

String theory is the only serious candidate for a unified description of all known fundamental particles and interactions, including gravity, in a single theoretical framework. Over the past two years, activity in this subject has grown rapidly, thanks to dramatic advances in understanding the dynamics of supersymmetric field theories and string theories. The cornerstone of these new developments is the discovery of duality which relates apparently different string theories and transforms difficult strongly coupled problems of one theory into weakly coupled problems of another theory.

Giddings, S.B.; Ooguri, H.; Peet, A.W.; Schwarz, J.H.

1998-06-01

169

Theoretical Issues  

SciTech Connect

The theoretical issues in the interpretation of the precision measurements of the nucleon-to-Delta transition by means of electromagnetic probes are highlighted. The results of these measurements are confronted with the state-of-the-art calculations based on chiral effective-field theories (EFT), lattice QCD, large-Nc relations, perturbative QCD, and QCD-inspired models. The link of the nucleon-to-Delta form factors to generalized parton distributions (GPDs) is also discussed.

Marc Vanderhaeghen

2007-04-01

170

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

171

The Fabled Maine Winter  

NSDL National Science Digital Library

No study of Maine weather would be complete without analysis of the year of 1816 - the year with no summer in an area from western Pennsylvania and New York, up through Quebec and across to Maine and the Canadian maritimes. In this five-unit lesson, students will investigate the causes and effects of the Fabled Maine Winter by exploring a variety of data sources. They will locate, graph, and analyze meteorological and climatological data for Portland, Maine, for more recent years to try to find one that most closely resembles the fabled Maine winter of 1816.

172

Nonlinear estimation framework in target tracking  

Microsoft Academic Search

The goal of the article is to describe a software framework designed for nonlinear state estimation of discrete-time dynamic systems. The framework was designed with the aim to facilitate implementation, testing and use of various nonlinear state estimation methods. The main strength of the framework is its versatility due to the possibility of either structural or probabilistic model description. Besides

O. Straka; M. Fli?dr; J. Duni?k; E. Blasch

2010-01-01

173

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

174

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.

175

The Maine Event  

ERIC Educational Resources Information Center

In this article, the author describes the successful laptop program employed at Mt. Abram High School in Strong, Maine. Through the Maine Learning Technology Initiative, the school has issued laptops to all 36,000 teachers and students in grades 7-8. This program has helped level the playing field for a student population that is 50 percent to 55…

McHale, Tom

2007-01-01

176

Gulf of Maine: Weather  

NSDL National Science Digital Library

Lessons and activities from the Gulf of Maine Research Institute (formerly Gulf of Maine Aquarium), focused on hurricanes, El Nino, fog, and volcanic eruptions. Emphasis on important hurricanes of the past. Resources include lessons, guides for simple experiments, and a student weather network. Downloadable materials and additional webpages also provided.

2010-08-04

177

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...

178

on Hurricane Island, Maine  

Microsoft Academic Search

In 1981, a study was initiated to measure the effects of low-level trampling (100 to 200 tramples) on selected vegetation on Hurricane Island, Maine. Low levels of trampling are representative of general recreational use patterns on most Maine islands. The study was designed to compare percent survival of common island species when subjected to low-level trampling, to observe treadway formation,

R. E. Leonard; P. W. Conkling; J. L. McMahon

179

Maine Folklife Center  

NSDL National Science Digital Library

Located at the University of Maine, the Maine Folklife Center is committed to documenting and understanding the folklore, folklife, and history of Maine and Atlantic Canada. Along with its various scholarly activities, the Center sponsors a number of festivals, lectures, and like-minded programs that encourage appreciation of the diverse cultural traditions within the region. The site will be useful to researchers with a penchant in these fields, as it contains information about the collections, including a rather extensive oral history collection (with work that documenting the cranberry culture of Massachusetts and the traditional music of Maine). There is also material on the public programs and exhibits sponsored by the center, and a set of external links that lead to other sites dealing with oral history, folklore, and Maine. While the Center's site does not have a great deal of online material for consideration, the center has transcribed the sixth volume of Northeast Folklore (originally published in 1964) and placed them online.

180

NA57 main results  

E-print Network

The CERN NA57 experiment was designed to study the production of strange and multi-strange particles in heavy ion collisions at SPS energies; its physics programme is essentially completed. A review of the main results is presented.

G. E. Bruno; for the NA57 Collaboration

2007-10-15

181

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.

182

The Maine Memory Network  

NSDL National Science Digital Library

Once you have visited Maine, it is most certainly not a place that you will soon forget. This website is designed to make sure longtime residents and visitors alike will not forget this tranquil state, as it brings together a very wide range of historical documents and memories from around the state. The site itself was created by the Maine Historical Society, and is supported by monies from the Institute of Museum and Library Services and several other partners. Within the site, visitors can search for historical items and documents, view thematic online exhibits, and learn about how the site may be used effectively in classroom settings. One particularly fine exhibit is the one that offers some visual documentation of rural Aroostook County around the year 1900. In this exhibit, visitors can experience the dense forests and rugged terrain that dominate the landscape of this part of Maine.

183

Ionic Liquids from Theoretical Investigations  

NASA Astrophysics Data System (ADS)

Theoretical investigations of ionic liquids are reviewed. Three main cate-gories are discussed, i.e., static quantum chemical calculations (electronic structure methods), traditional molecular dynamics simulations and first-principles molecular dynamics simulations. Simple models are reviewed in brief.

Kirchner, Barbara

184

Indian Education in Maine.  

ERIC Educational Resources Information Center

The Maine Department of Education assumed the responsibility for the education of Indian children living on Indian reservations on July 1, 1966. This report provides information on the present status of the program. Information is provided on number of schools, school enrollment for the 1969-1970 school year, characteristics of the teaching staff,…

Maine State Dept. of Education, Augusta.

185

Snow Falls - Maine  

USGS Multimedia Gallery

As the Little Androscoggin River flows through western Maine it eventually reaches Snow Falls, a 25 ft cascading waterfall in the town of West Paris.  This photo was taken during a high flow event at the falls. The USGS monitors the Little Androscoggin River upstream of the falls at station 01...

186

MAIN APPLICATIONS Spot welding  

E-print Network

IRB 6400 MAIN APPLICATIONS Spot welding Press tending Material handling Machine tending Palletizing Assembly Industrial Robot High performance industrial robot The 6-axis IRB 6400 manipulator and S4Cplus precision. IRB 6400 accounts for one third of the 90,000 ABB robot installations. The family of 6400 robots

De Luca, Alessandro

187

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...

188

Oliver Kullmann Main results  

E-print Network

Oliver Kullmann Main results Complement invariance Lean clause-sets Minimal unsatisfiability SAT and Outlook SAT and the Polya Permanent Problem Oliver Kullmann Computer Science Department Swansea University SAT 2007, Lisbon, May 30, 2007 SAT: Connecting combinatorics and linear algebra #12;Oliver Kullmann

Martin, Ralph R.

189

Main features of meiosis  

SciTech Connect

Chapter 17, outlines the main features of meiosis, beginning with its significance and proceeding through the meiotic stages. Meiosis is the most important modification of mitosis because it is the reduction division that gives rise to the haploid generation in the life cycle. 17 refs., 6 figs.

NONE

1993-12-31

190

Windows on Maine  

NSDL National Science Digital Library

Created with funds provided by the Institute of Museum and Library Services (IMLS), Windows on Maine contains interesting and informative programs and video clips from Maine Public Broadcasting and other partners. On their homepage, visitors can use their interactive map and timeline to locate video clips of interest, and they can also search the entire collection for specific items. Visitors can also use the subject category menu to look over 25 different headings, including "earth sciences", "land disputes", and "Penobscot tribe". The map feature is a real pip, and visitors can customize their search by location and date, and it's a great way to learn about different regions, including Aroostook County (also known as "the County") and Downeast. Also, many of the videos also have additional resources attached to them, such as railroad timetables, historic photographs, and so on.

191

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.

192

Main roads to melanoma  

PubMed Central

The characterization of the molecular mechanisms involved in development and progression of melanoma could be helpful to identify the molecular profiles underlying aggressiveness, clinical behavior, and response to therapy as well as to better classify the subsets of melanoma patients with different prognosis and/or clinical outcome. Actually, some aspects regarding the main molecular changes responsible for the onset as well as the progression of melanoma toward a more aggressive phenotype have been described. Genes and molecules which control either cell proliferation, apoptosis, or cell senescence have been implicated. Here we provided an overview of the main molecular changes underlying the pathogenesis of melanoma. All evidence clearly indicates the existence of a complex molecular machinery that provides checks and balances in normal melanocytes. Progression from normal melanocytes to malignant metastatic cells in melanoma patients is the result of a combination of down- or up-regulation of various effectors acting on different molecular pathways. PMID:19828018

Palmieri, Giuseppe; Capone, Mariaelena; Ascierto, Maria Libera; Gentilcore, Giusy; Stroncek, David F; Casula, Milena; Sini, Maria Cristina; Palla, Marco; Mozzillo, Nicola; Ascierto, Paolo A

2009-01-01

193

Jupiter's Main Ring  

NASA Technical Reports Server (NTRS)

A mosaic of four images taken through the clear filter (610 nanometers) of the solid state imaging (CCD) system aboard NASA's Galileo spacecraft on November 8, 1996, at a resolution of approximately 46 kilometers (km) per picture element (pixel) along the rings; however, because the spacecraft was only about 0.5 degrees above the ring plane, the image is highly foreshortened in the vertical direction. The images were obtained when Galileo was in Jupiter's shadow peering back toward the Sun; the ring was approximately 2,300,000 kilometers (km) away. The arc on the far right of the image is produced by sunlight scattered by small particles comprising Jupiter's upper atmospheric haze. The ring also efficiently scatters light, indicating that much of its brightness is due to particles that are microns or less in diameter. Such small particles are believed to have human-scale lifetimes, i.e., very brief compared to the solar system's age.

Jupiter's ring system is composed of three parts -- a flat main ring, a lenticular halo interior to the main ring, and the gossamer ring, which lies exterior to the main ring. The near and far arms of Jupiter's main ring extend horizontally across the mosaic, joining together at the ring's ansa, on the far left side of the figure. The near arm of the ring appears to be abruptly truncated close to the planet, at the point where it passes into Jupiter's shadow. Some radial structure is barely visible across the ring's ansa. A faint mist of particles can be seen above and below the main rings; this vertically extended 'halo' is unusual in planetary rings, and is probably caused by electromagnetic forces pushing the smallest grains out of the ring plane. Because of shadowing, the halo is not visible close to Jupiter in the lower right part of the mosaic.

Jupiter's main ring is a thin strand of material encircling the planet. The diffuse innermost boundary begins at approximately 123,000 km. The main ring's outer radius is found to be at 128,940 +/-50 km, slightly less than the Voyager value of 129,130 +/-100 km, but very close to the orbit of the satellite Adrastea (128,980 km). The main ring exhibits a marked drop in brightness at 127,849 +/-50 km, lying almost atop the orbit of the Jovian moon Metis at 127,978 km. Satellites seem to affect the structure of even tenuous rings like that found at Jupiter.

The Jet Propulsion Laboratory, Pasadena, CA manages the mission for NASA's Office of Space Science, Washington, DC.

This image and other images and data received from Galileo are posted on the World Wide Web, on the Galileo mission home page at: http://galileo.jpl.nasa.gov. Background information and educational context for the images can be found at: http:/ /www.jpl.nasa.gov/galileo/sepo.

1997-01-01

194

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

195

Energetic Main Idea  

NSDL National Science Digital Library

In this lesson, students will learn about different forms of energy and how to find the main idea and key details in informational text. Included with the lesson is an anticipation guide to assess prior knowledge, plus a rubric to score the students' summative assessment. Also present is a list of books to choose from so that teachers can use the books that fit their students best.

Shipley, Amanda

2012-09-16

196

Maine coast winds  

SciTech Connect

The Maine Coast Winds Project was proposed for four possible turbine locations. Significant progress has been made at the prime location, with a lease-power purchase contract for ten years for the installation of turbine equipment having been obtained. Most of the site planning and permitting have been completed. It is expect that the turbine will be installed in early May. The other three locations are less suitable for the project, and new locations are being considered.

Avery, Richard

2000-01-28

197

Main graphs: Quadratic equation  

E-print Network

Main graphs: Quadratic equation: Equation A2 +B+C = 0, has solutions given by the following 'abc equations: Equation dN dt = kN has the solution: N(t) = N0ekt; N0 is an (arbitrary) initial value of N. Characteristic time of change is = 1/k. Systems of linear differential equations: For system dx dt = ax+by dy dt

Utrecht, Universiteit

198

Theoretical approach to regional environmental conflicts  

SciTech Connect

A regional analysis framework was developed to address regional environmental problems. This interdisciplinary framework is based on the utilization of four principal variables: environmental pattern, assets, and human culture as influenced by the externalities. The framework was applied to three heuristic examples: urban energy supplies in the north-eastern United States; resource extraction in the Rocky Mountain region of the US; and cattle herding in East Africa. The illustrated analyses and their results verify the broad utility of the theory underlying this framework. Although more in-depth analyses would be required to solve the real-world problems, our preliminary analyses indicate that the theoretical framework presented here can indeed be useful in approaching the regional environmental problem, analyzing the significant interactions in the system, and describing the regional dynamics among these variables and components. 34 references, 6 figures, 3 tables

Klopatek, J.M.; Krummel, J.R.; Mankin, J.B.; O'Neill, R.V.

1983-01-01

199

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

200

A framework for delay emulation of large-scale internetworks  

E-print Network

. The framework models and dynamically adapts the test traffic according to the network delay characteristics observed on the Internet in real-time. The proposed framework consists of three main modules: Virtual Host Configuration Module, Delay Estimator...

Venkata, Shravan Rangaraju

2001-01-01

201

A logical framework for designing robust distributed NLP applications  

Microsoft Academic Search

Abstract: The main goal of our work is to propose an agent-oriented framework for developing robust NLP applications. The framework is a computational logic-based environment for developing document analysis applications.

Vincenzo Pallotta

2001-01-01

202

Anthropology rediscovers sexuality: A theoretical comment  

Microsoft Academic Search

Despite its reputation for openness to research on sexuality, anthropology as a discipline has only reluctantly supported such work. Anthropological research and theory developed slowly, sharing a stable theoretical paradigm (the cultural influence model) from the 1920s to the 1990s. Moving beyond determinist and essentialist frameworks still common in biomedicine, anthropological work nevertheless viewed important aspects of sexuality as universal

Carole S. Vance

1991-01-01

203

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

204

Visual selective attention: A theoretical analysis  

Microsoft Academic Search

The present paper outlines a framework which allows a consistent interpretation of data regarding visual selection in visual search tasks. It organizes and reviews visual search tasks in which the target is defined by primitive features, by conjunctions of features and when the target is categorically different from non-targets. The special role of spatial attention is reviewed and different theoretical

Jan Theeuwes

1993-01-01

205

Designing Optimal Sales Contests: A Theoretical Perspective  

Microsoft Academic Search

Sales contests are commonly used by firms as a short-term motivational device to increase salespeople's efforts. Conceptually, sales contests and piece-rate schemes, such as salary, commission, or quotas, differ in that in sales contests payment to salespeople is based on relative rather than absolute sales levels. Using the agency theoretic framework where the firm is risk neutral and the salespeople

Ajay Kalra; Mengze Shi

2001-01-01

206

Revenge after trauma: Theoretical outline  

Microsoft Academic Search

\\u000a Tis chapter focuses on revenge, a somewhat neglected psychological phenomenon ofen occurring in the context of embitterment\\u000a that has been observed to be associated with traumatization and Posttraumatic Stress Disorder (PTSD). Recent theoretical approaches\\u000a to and research findings on revenge and its specific relationship to embitterment phenomena are summarized, and therapeutic\\u000a implications are discussed. The main objective of the chapter

Ira Gäbler; Andreas Maercker

207

A Framework for Ethical Conformity in Marketing  

Microsoft Academic Search

The extant marketing literature provides little guidance for theory development or practice with regard to questions of ethical\\u000a conformity and the resulting market response. To begin to bridge this research gap, we advance a theoretical framework of\\u000a ethical conformity in marketing, appealing to marketing ethics, management strategy, and sociological foundations. We set\\u000a the stage for our theoretical arguments by considering

Kelly D. Martin; Jean L. Johnson

2008-01-01

208

Economic Impact Reporting Framework  

E-print Network

Economic Impact Reporting Framework 2007/08 November 2008 #12;#12;Economic Impact Reporting Framework 2007/08 #12;STFC Economic Impact Reporting Framework 2007/08 Contents: Introduction..............................................................................................................................................2 1: Overall Economic Impacts

209

Economic Impact Reporting Framework  

E-print Network

Economic Impact Reporting Framework 2008/09 #12;#12;Economic Impact Reporting Framework 2008/09 #12;STFC Economic Impact Reporting Framework 2008/09 Contents: Introduction..............................................................................................................................................2 1: Overall Economic Impacts

210

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

211

COMMORG Theoretical Framework: E-MAIL, SOCIAL STRUCTURE AND NETWORKS  

E-print Network

of the work of many European theorists, such as: Giddens's (1979, 1984) structuration theory; Archer's (1995 and competence' upon which actors are able to draw in action but without being able to express it (what

Boudourides, Moses A.

212

Polarimetry With Phased Array Antennas: Theoretical Framework and Definitions  

NASA Astrophysics Data System (ADS)

For phased array receivers, the accuracy with which the polarization state of a received signal can be measured depends on the antenna configuration, array calibration process, and beamforming algorithms. A signal and noise model for a dual-polarized array is developed and related to standard polarimetric antenna figures of merit, and the ideal polarimetrically calibrated, maximum-sensitivity beamforming solution for a dual-polarized phased array feed is derived. A practical polarimetric beamformer solution that does not require exact knowledge of the array polarimetric response is shown to be equivalent to the optimal solution in the sense that when the practical beamformers are calibrated, the optimal solution is obtained. To provide a rough initial polarimetric calibration for the practical beamformer solution, an approximate single-source polarimetric calibration method is developed. The modeled instrumental polarization error for a dipole phased array feed with the practical beamformer solution and single-source polarimetric calibration was -10 dB or lower over the array field of view for elements with alignments perturbed by random rotations with 5 degree standard deviation.

Warnick, Karl F.; Ivashina, Marianna V.; Wijnholds, Stefan J.; Maaskant, Rob

2012-01-01

213

An Information Theoretic Framework for Eukaryotic Gradient Sensing  

E-print Network

transduction" networks. Despite this suggestive terminology, there have been few attempts to analyze chemical in understanding biochemical cellular communication [3, 4]. Dictyostelium is a soil dwelling amoeba that aggregates

Thomas, Peter J.

214

Binary collision rates of relativistic thermal plasmas. I Theoretical framework  

NASA Technical Reports Server (NTRS)

Binary collision rates for arbitrary scattering cross sections are derived in the case of a beam of particles interacting with a Maxwell-Boltzmann (MB) plasma, or in the case of two MB plasmas interacting at generally different temperatures. The expressions are valid for all beam energies and plasma temperatures, from the nonrelativistic to the extreme relativistic limits. The calculated quantities include the reaction rate, the energy exchange rate, and the average rate of change of the squared transverse momentum component of a monoenergetic particle beam as a result of scatterings with particles of a MB plasma. Results are specialized to elastic scattering processes, two-temperature reaction rates, or the cold plasma limit, reproducing previous work.

Dermer, C. D.

1985-01-01

215

Design theoretic analysis of three system modeling frameworks.  

SciTech Connect

This paper analyzes three simulation architectures from the context of modeling scalability to address System of System (SoS) and Complex System problems. The paper first provides an overview of the SoS problem domain and reviews past work in analyzing model and general system complexity issues. It then identifies and explores the issues of vertical and horizontal integration as well as coupling and hierarchical decomposition as the system characteristics and metrics against which the tools are evaluated. In addition, it applies Nam Suh's Axiomatic Design theory as a construct for understanding coupling and its relationship to system feasibility. Next it describes the application of MATLAB, Swarm, and Umbra (three modeling and simulation approaches) to modeling swarms of Unmanned Flying Vehicle (UAV) agents in relation to the chosen characteristics and metrics. Finally, it draws general conclusions for analyzing model architectures that go beyond those analyzed. In particular, it identifies decomposition along phenomena of interaction and modular system composition as enabling features for modeling large heterogeneous complex systems.

McDonald, Michael James

2007-05-01

216

Understanding educational transfer: theoretical perspectives and conceptual frameworks  

Microsoft Academic Search

Educational transfer is an important and growing body of literature in the field of comparative education. Work from the last\\u000a decade has focused on the stages of the borrowing cycle, and the context, causes and rationales for education borrowing. This\\u000a recent work has contributed to earlier research on the role of multilateral organizations in education development and transfer.\\u000a Rather than

Laura B. Perry; Geok-hwa Tor

2008-01-01

217

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

218

A Framework for Theoretical Analysis of Content Fingerprinting  

E-print Network

previously carried out in the related field of robust image hashing [2,3], there are subtle differences applications of image hashing typically focus on authenticating a smaller set of images. As a result in content fingerprinting that bring with them unique challenges. Traditionally, robust hashing was studied

Wu, Min

219

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

220

Modeling Concept Combinations in a Quantum-theoretic Framework  

E-print Network

We present modeling for conceptual combinations which uses the mathematical formalism of quantum theory. Our model faithfully describes a large amount of experimental data collected by different scholars on concept conjunctions and disjunctions. Furthermore, our approach sheds a new light on long standing drawbacks connected with vagueness, or fuzziness, of concepts, and puts forward a completely novel possible solution to the 'combination problem' in concept theory. Additionally, we introduce an explanation for the occurrence of quantum structures in the mechanisms and dynamics of concepts and, more generally, in cognitive and decision processes, according to which human thought is a well structured superposition of a 'logical thought' and a 'conceptual thought', and the latter usually prevails over the former, at variance with some widespread beliefs

Diederik Aerts; Sandro Sozzo

2014-01-15

221

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

222

Understanding Educational Transfer: Theoretical Perspectives and Conceptual Frameworks  

ERIC Educational Resources Information Center

Educational transfer is an important and growing body of literature in the field of comparative education. Work from the last decade has focused on the stages of the borrowing cycle, and the context, causes and rationales for education borrowing. This recent work has contributed to earlier research on the role of multilateral organizations in…

Perry, Laura B.; Tor, Geok-hwa

2008-01-01

223

Emergent Writing in Preschoolers: Preliminary Evidence for a Theoretical Framework  

ERIC Educational Resources Information Center

Researchers and educators use the term "emergent literacy" to refer to a broad set of skills and attitudes that serve as foundational skills for acquiring success in later reading and writing; however, models of emergent literacy have generally focused on reading and reading-related behaviors. Hence, the primary aim of this study was to…

Puranik, Cynthia S.; Lonigan, Christopher J.

2014-01-01

224

Towards a Theoretical Framework of Digital Supply Chain Integration  

Microsoft Academic Search

One of the most significant changes in organizational business models has been that it is not the individual organizations that compete with each other; rather they compete as a network of organizations forming the supply chain. To compete as supply chains in a digital economy organizations invest in digital applications, and IT infrastructure for supply chain integration. They also establish

Ravi Patnayakuni; Nainika Patnayakuni; Arun Rai

2002-01-01

225

Theoretical framework for the viscosity equation for strong glasses  

Microsoft Academic Search

One of the most important applications of the stochastic matrix method is the evaluation of the probability of forming a ring for B2O3, as a description of the growth process of a solid. In a recent work Dagdug and García-Colín (L. Dagdug and L. S. García-Colín, J. Phys.:Condens. Matter 11, 2193 (1999)) generalized this method for the same substance introducing

Leonardo Dagdug

2005-01-01

226

Going for Growth; a Theoretical and Policy Framework  

Microsoft Academic Search

This paper introduces scenario planning as a tool to explore plausible developments for SMEs in the Netherlands until 2040. Globalization has resulted in the emergence of an increasingly borderless society with greater unrestricted movement of information, travel, and currency between countries. As policy and technological developments in the past few decades have spurred increases in cross-border trade, investment, and migration,

Peter Nijkamp; Patricia van Hemert

2007-01-01

227

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

228

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

229

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

230

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

231

University of Maine Cooperative Extension  

E-print Network

University of Maine Cooperative Extension Hand Signals Useful for Farmers Bulletin #2335 by Dawna L of Congress of May 8 and June 30, 1914, by the University of Maine Cooperative Extension, Vaughn H. Holyoke, Director for the University of Maine Cooperative Extension, the Land Grant University of the state of Maine

Leistikow, Bruce N.

232

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

233

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

234

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

235

Theory-Based Negotiation Frameworks for Supporting Group Work  

Microsoft Academic Search

In this paper we begin by presenting a taxonomy of impasses in group work situations. The taxonomy includes factors such as goal conflicts and resource limitations. We then present a prescriptive theoretical framework designed to support negotiation during these impasses. We also describe NegotiationLens, a system which embodies the framework by supporting the actions prescribed by the theory. We then

Beth Adelson

1993-01-01

236

The EQ Framework for Learning Equivalence Classes of Bayesian Networks  

Microsoft Academic Search

This paper proposes a theoretical and an algorithmic framework for the analysis and the design of efficient learning algorithms which explore the space of equivalence classes of Bayesian network structures. This framework is composed of a generic learning model which uses essential graphs and more general partially directed graphs in order to represent the equivalence classes evaluated during search, operational

Paul Munteanu; Mohamed Bendou

2001-01-01

237

Risk measures The main result  

E-print Network

Outline Risk measures The main result A collection of risk measures Dual representations of risk measures Georg Ch. Pflug May 7, 2005 Georg Ch. Pflug Dual representations of risk measures #12;Outline Risk measures The main result A collection of risk measures Risk measures The main result A collection of risk

Pflug, Georg

238

2014 Maine Earth Science Day  

USGS Multimedia Gallery

On October 15, 2014 Maine Earth Science Day was held at the Maine State Museum in Augusta. The USGS was represented by Charlie Culbertson, left, and Nick Waldron, right. This photo was taken as the two were packing up for the day, and shows a main feature of the table, a touch screen display with th...

239

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

240

Taking a geometric look at the socio-political functioning schemes of the living. Catastrophe theory and theoretical sociology.  

PubMed

The aim of this communication is to consider morphological processes in sociology, mainly through the study of the stability of forms of sociality. At the same time, it aims to study the regulation of constraints, related to an increasingly conflictual environment, through political organization. We use a specific theoretical framework: the catastrophe theory developed by René Thom in topology, further developed by Claude Bruter from a physics point of view, and reworked by Jacques Viret in biology. The idea is to show the existence of archetypal processes organizing social forms. PMID:23943093

Morier, Clément

2013-09-01

241

A new pressure ulcer conceptual framework  

PubMed Central

Aim This paper discusses the critical determinants of pressure ulcer development and proposes a new pressure ulcer conceptual framework. Background Recent work to develop and validate a new evidence-based pressure ulcer risk assessment framework was undertaken. This formed part of a Pressure UlceR Programme Of reSEarch (RP-PG-0407-10056), funded by the National Institute for Health Research. The foundation for the risk assessment component incorporated a systematic review and a consensus study that highlighted the need to propose a new conceptual framework. Design Discussion Paper. Data Sources The new conceptual framework links evidence from biomechanical, physiological and epidemiological evidence, through use of data from a systematic review (search conducted March 2010), a consensus study (conducted December 2010–2011) and an international expert group meeting (conducted December 2011). Implications for Nursing A new pressure ulcer conceptual framework incorporating key physiological and biomechanical components and their impact on internal strains, stresses and damage thresholds is proposed. Direct and key indirect causal factors suggested in a theoretical causal pathway are mapped to the physiological and biomechanical components of the framework. The new proposed conceptual framework provides the basis for understanding the critical determinants of pressure ulcer development and has the potential to influence risk assessment guidance and practice. It could also be used to underpin future research to explore the role of individual risk factors conceptually and operationally. Conclusion By integrating existing knowledge from epidemiological, physiological and biomechanical evidence, a theoretical causal pathway and new conceptual framework are proposed with potential implications for practice and research. PMID:24684197

Coleman, Susanne; Nixon, Jane; Keen, Justin; Wilson, Lyn; McGinnis, Elizabeth; Dealey, Carol; Stubbs, Nikki; Farrin, Amanda; Dowding, Dawn; Schols, Jos MGA; Cuddigan, Janet; Berlowitz, Dan; Jude, Edward; Vowden, Peter; Schoonhoven, Lisette; Bader, Dan L; Gefen, Amit; Oomens, Cees WJ; Nelson, E Andrea

2014-01-01

242

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

243

Theoretical Perspectives on Protein Folding  

E-print Network

Understanding how monomeric proteins fold under in vitro conditions is crucial to describing their functions in the cellular context. Significant advances both in theory and experiments have resulted in a conceptual framework for describing the folding mechanisms of globular proteins. The experimental data and theoretical methods have revealed the multifaceted character of proteins. Proteins exhibit universal features that can be determined using only the number of amino acid residues (N) and polymer concepts. The sizes of proteins in the denatured and folded states, cooperativity of the folding transition, dispersions in the melting temperatures at the residue level, and time scales of folding are to a large extent determined by N. The consequences of finite N especially on how individual residues order upon folding depends on the topology of the folded states. Such intricate details can be predicted using the Molecular Transfer Model that combines simulations with measured transfer free energies of protein building blocks from water to the desired concentration of the denaturant. By watching one molecule fold at a time, using single molecule methods, the validity of the theoretically anticipated heterogeneity in the folding routes, and the N-dependent time scales for the three stages in the approach to the native state have been established. Despite the successes of theory, of which only a few examples are documented here, we conclude that much remains to be done to solve the "protein folding problem" in the broadest sense.

D. Thirumalai; Edward P. O'Brien; Greg Morrison; Changbong Hyeon

2010-07-18

244

TIMSS 2007 Assessment Frameworks  

ERIC Educational Resources Information Center

Developing the Trends in International Mathematics and Science Study (TIMSS) 2007 Assessment Frameworks represents an extensive collaborative effort involving individuals and expert groups from more than 60 countries around the world. The document contains three frameworks for implementing TIMSS 2007--the Mathematics Framework, the Science…

Mullis, Ina V. S.; Martin, Michael O.; Ruddock, Graham J.; O'Sullivan, Christine Y.; Arora, Alka; Erberber, Ebru

2005-01-01

245

Perspective Theoretical Neuroscience Rising  

E-print Network

Neuron Perspective Theoretical Neuroscience Rising L.F. Abbott1,* 1Department of Neuroscience *Correspondence: lfabbott@columbia.edu DOI 10.1016/j.neuron.2008.10.019 Theoretical neuroscience has experienced to introduce new ideas and shape directions of neuroscience research. This review presents some

Columbia University

246

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

247

A Markov Random Field Groupwise Registration Framework for Face Recognition  

PubMed Central

In this paper, we propose a new framework for tackling face recognition problem. The face recognition problem is formulated as groupwise deformable image registration and feature matching problem. The main contributions of the proposed method lie in the following aspects: (1) Each pixel in a facial image is represented by an anatomical signature obtained from its corresponding most salient scale local region determined by the survival exponential entropy (SEE) information theoretic measure. (2) Based on the anatomical signature calculated from each pixel, a novel Markov random field based groupwise registration framework is proposed to formulate the face recognition problem as a feature guided deformable image registration problem. The similarity between different facial images are measured on the nonlinear Riemannian manifold based on the deformable transformations. (3) The proposed method does not suffer from the generalizability problem which exists commonly in learning based algorithms. The proposed method has been extensively evaluated on four publicly available databases: FERET, CAS-PEAL-R1, FRGC ver 2.0, and the LFW. It is also compared with several state-of-the-art face recognition approaches, and experimental results demonstrate that the proposed method consistently achieves the highest recognition rates among all the methods under comparison. PMID:25506109

Liao, Shu; Shen, Dinggang; Chung, Albert C.S.

2014-01-01

248

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, María Teresa; Vives?Cases, Carmen; Artazcoz, Lucía; Delgado, Ana; del Mar García Calvente, Maria; Miqueo, Consuelo; Montero, Isabel; Ortiz, Rocío; Ronda, Elena; Ruiz, Isabel; Valls, Carme

2007-01-01

249

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

250

Main Injector power distribution system  

SciTech Connect

The paper describes a new power distribution system for Fermilab's Main Injector. The system provides 13.8 kV power to Main Injector accelerator (accelerator and conventional loads) and is capable of providing power to the rest of the laboratory (backfeed system). Design criteria, and features including simulation results are given.

Cezary Jach and Daniel Wolff

2002-06-03

251

Investigating Potential Main Belt Comets  

NASA Astrophysics Data System (ADS)

The discovery of a new class of objects, the Main Belt Comets, has confirmed that ice has been preserved within the Main Belt, despite the fact that the snowline long ago migrated outwards to ~5AU. Main Belt Comets are cometary in appearance, with comae and dust tails visible, but are dynamically unremarkable when compared to asteroids within the Main Belt. Three of the four known Main Belt Comets are dynamically linked to the Themis Family - a collisional family of ~550 asteroids that was created when a 380km progenitor catastrophically disrupted approximately 2Gyr ago. Other Themis Family members are likely to have retained ice deposits and are, thus, potential Main Belt Comets, yet, conversely, hydrated minerals have been detected on one member of the family, asteroid 24 (Themis). The presence of these minerals imply that liquid water was once present on the asteroid, and suggest post-formation heating took place. The preservation of ice within Main Belt Comets suggests that the Themis Family may have once been, and may still be, an important reservoir of ice, while the detection of hydrated minerals on asteroid 24 (Themis) argues for post-formation heating in that region. We will search for hydration features on Themis Family asteroids to constrain the possible thermal evolution of potential Main Belt Comets.

Stevenson, Rachel; Jewitt, David

2009-08-01

252

MAINE LANDS OVER 2700 FEET  

EPA Science Inventory

MECON2700 contains areas in Maine with elevations greater than 2700 feet, generated from USGS 1:250,000 DEMs. Areas above 2700 feet are regulated by the Maine Land Use Regulation Commission (MELURC). Areas were generated from USGS 1:250,000 scale digital elevation models using A...

253

Maine Agricultural Foods. Project SEED.  

ERIC Educational Resources Information Center

This paper describes an activity-based program that teaches students in grades 4-12 about the importance of Maine agriculture in their lives. Specifically, the goal is to increase student awareness of how the foods they eat are planted, harvested, and processed. The emphasis is on crops grown in Maine such as potatoes, broccoli, peas, blueberries,…

Beaulieu, Peter; Ossenfort, Pat

254

Theoretical studies of reaction surfaces  

NASA Astrophysics Data System (ADS)

The main goals in the previous grant period have been to develop new, more effective methods for performing accurate ab initio electronic structure calculations and to use these methods for the prediction of molecular structure, bonding and reactivity, especially for main group species and reactions of interest to the Air Force. From the theoretical point of view, the principle accomplishments have been extensive development of approaches and codes for performing electronic structure calculations in parallel, continued development of methods for interfacing electronic structure calculations with dynamics, initial studies of the possibility of splicing together different levels of electronic structure theory, and the development of a new model for treating solvation. Applications have ranged from the development of very accurate and extensive potential energy surfaces for A +HB reactions (to interface with the experiments) to the role of catalysts in the hydrosilation reaction to extensive studies of reactions involved in both main group and transition metal chemical vapor deposition (CVD) to broad-based studies of cage molecules (using our new parallel capabilities) that are potential precursors for new materials electronic and optical devices and catalysts. A new area that we have entered into is a series of systematic calculations on transition metal(TM)-main group (MG) compounds and their roles and catalysts and in such important area as CVD.

Gordon, Mark S.

1994-08-01

255

Main Propulsion Test Article (MPTA)  

NASA Technical Reports Server (NTRS)

Scope: The Main Propulsion Test Article integrated the main propulsion subsystem with the clustered Space Shuttle Main Engines, the External Tank and associated GSE. The test program consisted of cryogenic tanking tests and short- and long duration static firings including gimbaling and throttling. The test program was conducted on the S1-C test stand (Position B-2) at the National Space Technology Laboratories (NSTL)/Stennis Space Center. 3 tanking tests and 20 hot fire tests conducted between December 21 1 1977 and December 17, 1980 Configuration: The main propulsion test article consisted of the three space shuttle main engines, flightweight external tank, flightweight aft fuselage, interface section and a boilerplate mid/fwd fuselage truss structure.

Snoddy, Cynthia

2010-01-01

256

Understanding childbirth practices as an organizational cultural phenomenon: a conceptual framework  

PubMed Central

Understanding the main values and beliefs that might promote humanized birth practices in the specialized hospitals requires articulating the theoretical knowledge of the social and cultural characteristics of the childbirth field and the relations between these and the institution. This paper aims to provide a conceptual framework allowing examination of childbirth practices through the lens of an organizational culture theory. A literature review performed to extrapolate the social and cultural factors contribute to birth practices and the factors likely overlap and mutually reinforce one another, instead of complying with the organizational culture of the birth place. The proposed conceptual framework in this paper examined childbirth patterns as an organizational cultural phenomenon in a highly specialized hospital, in Montreal, Canada. Allaire and Firsirotu’s organizational culture theory served as a guide in the development of the framework. We discussed the application of our conceptual model in understanding the influences of organizational culture components in the humanization of birth practices in the highly specialized hospitals and explained how these components configure both the birth practice and women’s choice in highly specialized hospitals. The proposed framework can be used as a tool for understanding the barriers and facilitating factors encountered birth practices in specialized hospitals. PMID:24215446

2013-01-01

257

Contextual Divorces: Towards a Framework for Identifying Critical Context Issues in Collaborative-Argumentation System Design  

Microsoft Academic Search

This paper provides some theoretical and empirical bases of a framework aimed at identifying critical context issues related\\u000a to the design of collaborative-argumentation systems especially systems supporting collective design rationale. The framework\\u000a is intended to help developers anticipate, diagnose, and repair divorces from context which can impede system usability. The\\u000a theoretical bases of the framework are the notion of contextual

Alain Giboin

1999-01-01

258

Field Theoretical Analysis of Microwave Ovens  

Microsoft Academic Search

A field theoretical method for the analysis of microwave ovens is presented. The developed computer code is the main building block for an accurate computer aided design of microwave ovens. The analysis models the food inside the oven by a lossy dielectric body. The matching elements in the feeding waveguide near the electrically large coupling aperture are taken into account.

M. Schulte; A. S. Omar

1991-01-01

259

Developing a conceptual framework for assessing competitiveness of India's agrifood chain  

Microsoft Academic Search

Purpose – The purpose of this paper is to present a conceptual framework and set of propositions to analyze competitiveness of India's agrifood chain. Nine components constitute the framework. These are identified on the basis of theoretical studies and expert consultations. Each component leads to at least one proposition. Design\\/methodology\\/approach – The framework is dependent on two major streams of

Silpa Sagheer; S. S. Yadav; S. G. Deshmukh

2009-01-01

260

A New Theoretical Psychology?  

ERIC Educational Resources Information Center

It is suggested that the study of artificial intelligence can provide ways of thinking about the human mind that are potentially valuable in formulating cognitive theories. Theoretical psychology is proposed as an appropriate classification for this branch of theory. (MSE)

Longuet-Higgins, H. C.

1982-01-01

261

Journal of Theoretical Biology ] (  

E-print Network

The threat of biological warfare and the emergence of new infectious agents spreading at a global scale have The global health, threatened by emerging infectious diseases, pandemic influenza, and biological warfareJournal of Theoretical Biology ] (

Szolovits, Peter

262

An Automata-Theoretic Approach to Infinite-State Systems  

Microsoft Academic Search

\\u000a In this paper we develop an automata-theoretic framework for reasoning about infinite-state sequential systems. Our framework\\u000a is based on the observation that states of such systems, which carry a finite but unbounded amount of information, can be\\u000a viewed as nodes in an infinite tree, and transitions between states can be simulated by finite-state automata. Checking that\\u000a a system satisfies a

Orna Kupferman; Nir Piterman; Moshe Y. Vardi

2010-01-01

263

A Literary Map of Maine  

NSDL National Science Digital Library

Sure, you might know that Longfellow was a member of the literati who called Maine home, but did you know that Robert McCloskey was one as well? In case you might have forgotten, McCloskey was the author and illustrator of those children's classics "Make Way for Ducklings" and "Blueberries for Sal". It's easy to learn about dozens of Maine authors via this delightful website created as part of a partnership between the Maine Sunday Telegram and a number of library and humanities groups in Maine. Currently, the map features over 50 sites, and visitors can browse around at their leisure to learn about authors like Longfellow, Stephen King, and Richard Russo. Clicking on each site will pull up a brief excerpt of each author's work, along with a brief bio.

264

History of Maine Fisheries Database  

NSDL National Science Digital Library

A number of institutions have begun to expand their digital collections in order to include lesser-known subjects, and the University of Maine's Raymond H. Fogler Library continues to expand their online offerings with this intriguing collection. Drawing on the holdings of institutions like the Machias Historical Society, the Maine Maritime Museum, and the Maine State Archives, their digital collections team has created this History of Maine Fisheries database. There aren't any subject headings or sample searches on the site, but it is still quite easy to use. Visitors can use the keyword search to locate materials of interest, and they can also set date parameters to look for materials from a given time period. To get started, visitors might try typing in words like "lobster", "fleet", and "Bangor".

265

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

266

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

267

Reusable rocket engine intelligent control system framework design, phase 2  

NASA Technical Reports Server (NTRS)

Elements of an advanced functional framework for reusable rocket engine propulsion system control are presented for the Space Shuttle Main Engine (SSME) demonstration case. Functional elements of the baseline functional framework are defined in detail. The SSME failure modes are evaluated and specific failure modes identified for inclusion in the advanced functional framework diagnostic system. Active control of the SSME start transient is investigated, leading to the identification of a promising approach to mitigating start transient excursions. Key elements of the functional framework are simulated and demonstration cases are provided. Finally, the advanced function framework for control of reusable rocket engines is presented.

Nemeth, ED; Anderson, Ron; Ols, Joe; Olsasky, Mark

1991-01-01

268

High frequency variations of the main magnetic field: convergence of observations and theory (Petrus Peregrinus Medal Lecture)  

NASA Astrophysics Data System (ADS)

Understanding the main magnetic field variations has been hindered by the discrepancy between the periods (from months to years) of the simplest linear wave phenomena and the relatively long time intervals (10 to 100 years) over which magnetic field changes can be confidently monitored. A theoretical description of short-period waves within the Earth's fluid core is at hand. Quasi-geostrophic inertial waves (akin to Rossby waves in the atmosphere) are slightly modified in the presence of magnetic fields and torsional oscillations consist of differential motion between coaxial rigid cylindrical annuli. Torsional oscillations are sensitive to the whole magnetic field that they shear in the course of their propagation. From their modelling, we have thus gained an estimate for the magnetic field strength in the core interior. There is now ongoing work to extend the theoretical framework to longer times. Furthermore, data collected from the Swarm constellation of three satellites to be launched this year by ESA will permit to better separate the internal and external magnetic signals. We may thus dream to detect quasi-geostrophic inertial waves. As the spectral ranges of theoretical models and observations begin to overlap, we can now go beyond the understanding of the magnetic field variations as the juxtaposition of partial models, arranged as a set of nested Matryoshka dolls. This talk will give illustrations for this statement, among which the question of induction in the lower mantle.

Jault, Dominique

2013-04-01

269

IBRD Operational Decision Framework  

SciTech Connect

The IBRD Operational Decision Framework in this document is an expansion of an emerging general risk management framework under development by an interagency working group. It provides the level of detail necessary to develop a general Consequence Management Guidance Document for biological contamination remediation and restoration. It is the intent of this document to support both wide area and individual site remediation and restoration activities. This product was initiated as a portion of the IBRD Task 1 Systems Analysis to aid in identification of wide area remediation and restoration shortcomings and gaps. The draft interagency general risk management framework was used as the basis for the analysis. The initial Task 1 analysis document expanded the draft interagency framework to a higher level of resolution, building on both the logic structure and the accompanying text explanations. It was then employed in a qualitative manner to identify responsible agencies, data requirements, tool requirements, and current capabilities for each decision and task. This resulted in identifying shortcomings and gaps needing resolution. Several meetings of a joint LLNL/SNL working group reviewed and approved the initial content of this analysis. At the conclusion of Task 1, work continued on the expanded framework to generate this Operational Decision Framework which is consistent with the existing interagency general risk management framework. A large LLNL task group met repeatedly over a three-month period to develop the expanded framework, coordinate the framework with the biological remediation checklist, and synchronize the logic with the Consequence Management Plan table of contents. The expanded framework was briefed at a large table top exercise reviewing the interagency risk management framework. This exercise had representation from major US metropolitan areas as well as national agencies. This product received positive comments from the participants. Upon completion of the Operational Decision Framework, another joint LLNL/SNL working group conducted a day-long review. Identified modifications were made to the document, resulting in the included product.

Greenwalt, R; Hibbard, W; Raber, E; Carlsen, T; Folks, K; MacQueen, D; Mancieri, S; Bunt, T; Richards, J; Hirabayashi-Dethier, J

2010-11-12

270

A comparison of justice frameworks for international research.  

PubMed

Justice frameworks have been developed for international research that provide guidance on the selection of research targets, ancillary care, research capacity strengthening, and post-trial benefits. Yet there has been limited comparison of the different frameworks. This paper examines the underlying aims and theoretical bases of three such frameworks-the fair benefits framework, the human development approach and research for health justice-and considers how their aims impact their guidance on the aforementioned four ethical issues. It shows that the frameworks' underlying objectives vary across two dimensions. First, whether they seek to prevent harmful or exploitative international research or to promote international research with health benefits for low and middle-income countries. Second, whether they address justice at the micro level or the macro level. The fair benefits framework focuses on reforming contractual elements in individual international research collaborations to ensure fairness, whereas the other two frameworks aim to connect international research with the reduction of global health inequities. The paper then highlights where there is overlap between the frameworks' requirements and where differences in the strength and content of the obligations they identify arise as a result of their varying objectives and theoretical bases. In doing so, it does not offer a critical comparison of the frameworks but rather seeks to add clarity to current debates on justice and international research by showing how they are positioned relative to one another. PMID:25378552

Pratt, Bridget; Loff, Bebe

2014-11-01

271

A systems framework for understanding social settings  

Microsoft Academic Search

In this paper, we argue that attempts to change social settings have been hindered by lack of theoretical advances in understanding\\u000a key aspects of social settings and how they work in a dynamic system. We present a systems framework for understanding youths’\\u000a social settings. We focus on three aspects of settings that represent intervention targets: social processes (i.e., patterns of

Vivian Tseng; Edward Seidman

2007-01-01

272

Maine`s electric revenue adjustment mechanism: Why it fizzled  

SciTech Connect

Though entered into with broad support and good intentions, the Maine experiment in decoupling revenues from sales came undone in the face of poor regional economic conditions and mild weather. Any new approach to decoupling should be designed to endure these unexpected outcomes.

Hudson, L.; Seguino, S.; Townsend, R.E.

1995-10-01

273

Remember the MaineRx.  

PubMed

In 2000, Maine became the first state in the US to enact a law to establish maximum retail prices for prescription drugs for all qualified state residents-MaineRx. The purpose was to lower prescription drug prices for all eligible residents of the state. The state was to have the ability to negotiate manufacturer rebates and pharmacy discounts. Major drug manufacturers, represented by the Pharmaceutical Research and Manufacturers of America, challenged MaineRx in the courts, going to the Supreme Court where it was upheld in 2003. Fifteen other states enacted, proposed, or filed price-control bills in their state legislatures. The result would have been downward pressure on prices outside of the public programs, and the first instance of state-sponsored monopsony power in the US. MaineRx is viewed as one of the proximate causes of the pharmaceutical industry's successful lobbying effort to implement Medicare Part D in 2004. Medicare Part D is administered through private Pharmacy Benefit Managers (PBMs); it made administration via state government PBMs illegal. The lower prices that could have resulted from MaineRx-type laws did not occur and the magnitude of these reductions is commented upon. PMID:24420789

Kemp, Robert

2014-02-01

274

A Review of Telehealth Service Implementation Frameworks  

PubMed Central

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

2014-01-01

275

Theoretical model of critical issues in informed consent in HIV vaccine trials.  

PubMed

The informed consent process (ICP) for HIV vaccine trials poses unique challenges and would benefit from improvements to its historically based structure and format. Here, we propose a theoretical framework that provides a basis for systematically evaluating and addressing these challenges. The proposed framework follows a linear pathway, starting with the precondition of voluntariness, three main variables of valid decision-making (competency, provision of information and understanding) and then the consequential outcome of either refusal or consent to participate. The existing literature reveals that culturally appropriate provision of information and resultant understanding by the vaccine trial participant are among the most significant factors influencing the authenticity of valid decision-making, though they may be overridden by other considerations, such as individual altruism, mistrust, and HIV-related stigma. Community collaborations to foster bidirectional transmission of information and more culturally tailored consenting materials, therefore, represent a key opportunity to enhance the ICP. By providing a visual synopsis of the issues most critical to IC effectiveness in a categorical and relational manner, the framework provided here presents HIV vaccine researchers a tool by which the ICP can be more systematically evaluated and consequently improved. PMID:24865892

Lewis, Cindi A; Dewhurst, Stephen; McMahon, James M; Bunce, Catherine A; Keefer, Michael C; Alio, Amina P

2014-01-01

276

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

277

Authoring Support Framework for Intelligent Educational Systems  

E-print Network

Authoring Support Framework for Intelligent Educational Systems Lora AROYO1 and Riichiro MIZOGUCHI2@ei.sanken.osaka-u.ac.jp Abstract. In this paper we discuss how Semantic web concepts can be beneficial for the authoring support SmartTrainer [3] and AIMS [1]. Authoring Task Ontology (ATO) is envisioned as main driving force

Mizoguchi, Riichiro

278

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

279

Materials Science Framework  

NSDL National Science Digital Library

This PDF document from Edmonds Community College provides a framework for a program in materials science. Components and competencies include chemical science skills, physical science skills, fundamentals of materials science and technology and materials testing. Different materials including metals, plastics, composites, wood, concrete, glasses and ceramics are also included in the program framework.

280

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

281

Arkansas History Frameworks. Revised.  

ERIC Educational Resources Information Center

This Arkansas history curriculum framework sets out the state content standards for grades K-4, grades 5-8, and grades 9-12. The framework lists the different history strands: Strand 1: "Time, Continuity, and Change"; Strand 2: "People, Places, and Environments"; Strand 3: "Production, Distribution, and Consumption"; Strand 4: "Power, Authority,…

Arkansas State Dept. of Education, Little Rock.

282

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

283

Map showing of UT's Main,  

E-print Network

$ $ Map showing locations of UT's Main, Scott Park, and Health Science Campuses Student Parking HEALTH SCIENCE CAMPUS GLENDALE BANCROFT NEBRASKA DETROIT FERI A NG BUILDING DIRECTORY AC Scott Park..........................................WBReceiving..........................................WB Minority Business Development Ctr....FAMinority Business Development Ctr....FA NorthwestNorthwest State

Viola, Ronald

284

South Columbia Street (Main Hospital)  

E-print Network

Dental School Bridge A Bridge B East Parking Circle Deck Jackson Building Office Physicians NC Cancer South Columbia Street wood Dri P Drive Drive West ve (Main Hospital) Old Tarrson Brauer Dental Research Hospital BridgeC Em ergency R oom D rive UNC Hospitals Visitor Maps for the University of North Carolina

Whitton, Mary C.

285

South Columbia Street (Main Hospital)  

E-print Network

Research Dental School Bridge A Bridge B East Parking Circle Deck Jackson Building Office Physicians NC South Columbia Street wood Dri Pit D rive Drive West ve (Main Hospital) Old Tarrson Brauer Dental Cancer Hospital BridgeC Em ergency R oom D rive UNC Hospitals Visitor Maps for the University of North

Whitton, Mary C.

286

Main Street in Iowa History.  

ERIC Educational Resources Information Center

This theme issue of "The Goldfinch" focuses on the main streets in Iowa's past. Residential and business patterns are discussed with an analysis of successes and failures. Efforts of young Iowans involved in preservation of a historic town square in their community are described. Activities, fiction selections, and nonfictional accounts of present…

Ruth, Amy, Ed.

1997-01-01

287

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

288

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

289

Main Campus Raleigh-Durham  

E-print Network

EGRC and Constructed Facilities Lab) Textiles ComplexCapability Dr. Bell Tower Stinson Dr. N NCSU North (Main) Campus for Advanced Electronic Materials Processing · Microelectronics Systems Lab · Multimedia Laboratory · Power of Textiles Complex · Textile Engr., Chemistry, and Sci. · Biomedical Engineering (partial) #12;#12;Directions

Velev, Orlin D.

290

Gulf of Maine Research Institute  

NSDL National Science Digital Library

Teaching about aquatic environments, serving as neutral conveners, and facilitating marine research is the mission of the Gulf of Maine Research Institute. Features hundreds of web pages with information and classroom activities covering: oceans, human impact, weather, satellite imagery, remote sensing, Antarctica, global climate change, lobsters, turtles, marine, freshwater issues and more. The project of building the new aquarium at Portland is specially considered.

291

MAINE CONTOUR LINES 60 FEET  

EPA Science Inventory

MECON60 contains contours at 60 foot intervals for the entire state of Maine as generated from USGS 1:250,000 scale digital elevation models using ARC/INFO software. Arcs are coded by elevation. Due to the nature of the source data, the positional accuracy of these contour line...

292

Theoretical Aspects of Translation.  

ERIC Educational Resources Information Center

This study attempts to bring some clarification into the concept of translation, especially into the theoretical problems presented by the difficulties of translation. The following aspects of the question are treated: (1) translation in the past and present, including the controversy over translation as an art or a science, the relevance of…

House, Juliane M.

293

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

294

An adaptive framework for 'single shot' motion planning  

E-print Network

an adaptive framework for single shot motion planning (i.e., planning without preprocessing). This framework can be used in any situation, and in particular, is suitable for crowded environments in which the robot's free C-space has narrow corridors. The main...

Jones, Christopher V

2013-02-22

295

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

296

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

297

Surficial Geologic Map of Maine  

NSDL National Science Digital Library

In this activity students become familiar with the nature and use of the Surficial Geologic Map of Maine and gain practice in using maps other than topographic maps. They will discover that surficial geology deals primarily with the geologically youthful, unconsolidated sedimentary materials that exist at, or close to the surface of a specific area and are important because the surface deposits filter and control the access of water to the water table. Students also learn that the study of surficial geology is important for siting of waste disposal facilities and for resources such as sand, gravel, and clay. Although this activity was written for a map of Maine, it will work in any state where surficial geological maps are available.

298

Field-theoretical description of deep inelastic scattering  

SciTech Connect

The most important theoretical notions concerning deep inelastic scattering are reviewed. Topics discussed are the model-independent approach, which is based on the general principles of quantum field theory, the application of quantum chromodynamics to deep inelastic scattering, approaches based on the quark--parton model, the light cone algebra, and conformal invariance, and also investigations in the framework of perturbation theory.

Geyer, B.; Robaschik, D.; Wieczorek, E.

1980-01-01

299

LVCSR rescoring with modified loss functions: a decision theoretic perspective  

Microsoft Academic Search

The problem of speech decoding is considered in a decision theoretic framework and a modified speech decoding procedure to minimize the expected risk under a general loss function is formulated. A specific word error rate loss function is considered and an implementation in an N-best list rescoring procedure is presented. Methods for estimation of the parameters of the resulting decision

Vaibhava Goel; William Byrne; Sanjeev Khudanpur

1998-01-01

300

Families, Geographical Separation, and the Internet: A Theoretical Prospectus.  

ERIC Educational Resources Information Center

The perception and acceptance of the Internet as a personal communication channel, and the functional characteristics of the Internet, provide a new means for geographically separated friends and family members to communicate with one another. This paper presents a theoretical framework for the study of family communication and electronic mail. A…

Jaffe, J. Michael; Aidman, Amy

301

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

302

Conceptualising barriers to incident reporting: a psychological framework  

Microsoft Academic Search

BackgroundIncident reporting systems are widely considered effective instruments for learning from incidents. However, research shows that many incidents are not reported by healthcare providers.ObjectiveThe lack of theoretical foundation in research on barriers to and motivators for incident reporting is addressed in this article, and a psychological framework of antecedents to staff's motivation (not) to report incidents is proposed.Framework developmentConcepts relevant

Y. Pfeiffer; T. Manser; T. Wehner

2010-01-01

303

A general framework and review of scatter correction methods in cone beam CT. Part 2: Scatter estimation approaches  

SciTech Connect

The main components of scatter correction procedures are scatter estimation and a scatter compensation algorithm. This paper completes a previous paper where a general framework for scatter compensation was presented under the prerequisite that a scatter estimation method is already available. In the current paper, the authors give a systematic review of the variety of scatter estimation approaches. Scatter estimation methods are based on measurements, mathematical-physical models, or combinations of both. For completeness they present an overview of measurement-based methods, but the main topic is the theoretically more demanding models, as analytical, Monte-Carlo, and hybrid models. Further classifications are 3D image-based and 2D projection-based approaches. The authors present a system-theoretic framework, which allows to proceed top-down from a general 3D formulation, by successive approximations, to efficient 2D approaches. A widely useful method is the beam-scatter-kernel superposition approach. Together with the review of standard methods, the authors discuss their limitations and how to take into account the issues of object dependency, spatial variance, deformation of scatter kernels, external and internal absorbers. Open questions for further investigations are indicated. Finally, the authors refer on some special issues and applications, such as bow-tie filter, offset detector, truncated data, and dual-source CT.

Ruehrnschopf and, Ernst-Peter; Klingenbeck, Klaus [Siemens AG, Healthcare Sector, Imaging and Therapy Division, D 91301 Forchheim (Germany)

2011-09-15

304

78 FR 70545 - KEI (Maine) Power Management (I) LLC, KEI (Maine) Power Management (II) LLC, KEI (Maine) Power...  

Federal Register 2010, 2011, 2012, 2013, 2014

...11472-060, 11132-028, 11482-030, 4202-023, 3562-024] KEI (Maine) Power Management (I) LLC, KEI (Maine) Power Management (II) LLC, KEI (Maine) Power Management (III) LLC, KEI (Maine) Power Management (IV)...

2013-11-26

305

Cybersecurity Framework Development Overview  

E-print Network

Cybersecurity Framework Development Overview NIST's Role in Implementing Executive Order 13636 "Improving Critical Infrastructure Cybersecurity" #12;Executive Order 13636: Improving Critical Infrastructure Cybersecurity - February 12, 2013 "The cyber threat to critical infrastructure continues to grow

Bentz, Dale P.

306

Cybersecurity Framework Development Overview  

E-print Network

Cybersecurity Framework Development Overview NIST's Role in Implementing Executive Order 13636 "Improving Critical Infrastructure Cybersecurity" #12;Executive Order 13636: Improving Critical Infrastructure Cybersecurity February 12, 2013 · "The cyber threat to critical infrastructure continues to grow

307

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

308

FRAMEWORKS FOR CONCEPTUALISING TERRORISM  

Microsoft Academic Search

Terrorism has been situated—and thereby implicitly also defined—in various contexts such as crime, politics, war, propaganda and religion. Depending on which framework one chooses, certain aspects of terrorism get exposed while others are placed ‘outside the picture’ if only one framework is utilised. In this article five conceptual lenses are utilised: 1. terrorism as\\/and crime; 2. terrorism as\\/and politics; 3.

P. Schmid Alex

2004-01-01

309

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

310

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.

311

Decision-Theoretic Troubleshooting  

Microsoft Academic Search

We describe a decision-theoretic methodology for case-based reasoning in diagnosis and troubleshooting applications. The system utilizes a special-structure Bayesian network to represent diagnostic cases, with nodes representing issues, causes, and symptoms. Dirichlet distributions are assessed at knowledge acquisition time to indicate the strength of relationships between variables. During a diagnosis session, a relevant subnetwork is extracted from a Bayesian-network database

John S. Breese; David Heckerman

1999-01-01

312

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

313

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

314

Theoretical Developments in SUSY  

NASA Astrophysics Data System (ADS)

I am proud that I was personally acquainted with Julius Wess. We first met in 1999 when I was working on the Yuri Golfand Memorial Volume (The Many Faces of the Superworld, World Scientific, Singapore, 2000). I invited him to contribute, and he accepted this invitation with enthusiasm. After that, we met many times, mostly at various conferences in Germany and elsewhere. I was lucky to discuss with Julius questions of theoretical physics, and hear his recollections on how supersymmetry was born. In physics Julius was a visionary, who paved the way to generations of followers. In everyday life he was a kind and modest person, always ready to extend a helping hand to people who were in need of his help. I remember him telling me how concerned he was about the fate of theoretical physicists in Eastern Europe after the demise of communism. His ties with Israeli physicists bore a special character. I am honored by the opportunity to contribute an article to the Julius Wess Memorial Volume. I will review theoretical developments of the recent years in non-perturbative supersymmetry.

Shifman, M.

2009-01-01

315

Enzootic Babesia microti in Maine.  

PubMed

Human babesiosis in the northeastern United States caused by Babesia microti (Apicomplexa: Piroplasmida) is mainly reported from coastal New England sites, where deer ticks (Ixodes dammini) are common. However, the piroplasm has been detected in microtine rodents elsewhere in association with I. angustus or other nidicolous ticks, suggesting that the agent is widely distributed but zoonotically significant only where a human-biting "bridge" vector is present. To determine whether this piroplasm may be enzootic in areas where I. dammini is absent, we surveyed small mammals collected from 2 sites in Maine, where I. angustus or I. muris is common but I. dammini is not. Of 43 chipmunks, voles, deer mice, and shrews examined, 3 (6.9, 95% confidence interval 0 to 14.5) were parasitemic, as determined by blood smear or polymerase chain reaction targeting a piroplasm-specific portion of the 18S ribosomal DNA gene. Phylogenetic analysis of the sequenced amplification products demonstrates the presence of 2 forms of B. microti. We conclude that B. microti may be enzootic in the absence of I. dammini but that human risk relates to dense infestations of this human-biting tick. PMID:14627162

Goethert, H K; Lubelcyzk, C; LaCombe, E; Holman, M; Rand, P; Smith, R P; Telford, S R

2003-10-01

316

Flavor ofmaine 4 Maine Sardine Pizza  

E-print Network

Flavor of maine #12;Flavor ofmaine 4 Maine Sardine Pizza Maine Tomato Surprise French Toasted Sardine Sandwich 6 Sardines on a Roll Maine Sardine Olive Sandwich Sardine Skyscraper Sandwich 7 Maine Sardine Submarine Sandwich Mustard Sauce 8 Bohemian Salad Marinade Maine Sardine Cole Slaw Cole Slaw

317

European Vocational Training "Systems"--Some Thoughts on the Theoretical Context of Their Historical Development  

ERIC Educational Resources Information Center

There are few long-term studies in which the development of vocational education and training (VET) is placed in a larger societal framework. Consequently, there is limited understanding as to why VET has evolved quite differently even in countries with similar economic and social development. In his reflections on a possible theoretical framework

Greinert, Wolf-Dietrich

2004-01-01

318

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

Tomás, J. M.

2012-01-01

319

Bedrock Geologic Map of Maine  

NSDL National Science Digital Library

In this activity students study a map of bedrock geology which describes the types of rocks that exist in a given area. It shows these rock units as well as their known and inferred contacts. Consideration is also given to folding, faulting, unconformities, and similar rock relationships. These features are often included in bedrock geology maps. Students study the legend and scale and become aware of the other information that is included on the map such as the stratigraphic column, list of formations, and inset map of metamorphic grade. Students then locate their city or town and draw a 40-mile diameter circle around it and identify all the symbols inside the circle and the age of the various rocks. Student question sheets are available at this site. Although this activity was written for a map of Maine, it will work in any state where geological maps are available.

320

A "Framework" for Object Oriented Frameworks Design David Parsons1  

E-print Network

-oriented frameworks are established tools for domain-specific reuse. Many frame- work design patterns have beenA "Framework" for Object Oriented Frameworks Design David Parsons1 , Awais Rashid2 , Andreas Speck3 application. We describe a more flex- ible component-based approach to framework design that stresses a common

Telea, Alexandru C.

321

Developing interdisciplinary environmental frameworks.  

PubMed

The purpose of this article is to review interdisciplinary systemic frameworks of environmental protection and evaluate their use as tools, educational policymaking and education. We analyze the pressures-state-responses (PSR) framework of the Organization for Economic Cooperation and Development, the drivers-pressures-state-impact-response (DPSIR) framework developed in the European Environment Agency and a later environmental political dynamics framework developed by Schroll and Staerdahl. We then continue the discussion by introducing a comprehensive model, labeled as the environmental protection process (EPP) framework that can be used to analyze and teach why there are environmental problems, what are their characteristics, and in which ways they can be mitigated. The EPP model is used for classifying measures of coping with environmental problems. Finally, a submodel of individual and societal factors affecting human action is formed. Environmental issues of transport are used as an illustrative example. We hope to contribute a relevant way to outline a wide interdisciplinary picture of environmental problems and solutions. PMID:18488556

Tapio, Petri; Willamo, Risto

2008-03-01

322

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

323

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

324

M dwarfs: Theoretical work  

NASA Technical Reports Server (NTRS)

Theoretical work on the atmospheres of M dwarfs has progressed along lines parallel to those followed in the study of other classes of stars. Such models have become increasingly sophisticated as improvements in opacities, in the equation of state, and in the treatment of convection were incorporated during the last 15 to 20 years. As a result, spectrophotometric data on M dwarfs can now be fitted rather well by current models. The various attempts at modeling M dwarf photospheres in purely thermal terms are summarized. Some extensions of these models to include the effects of microturbulence and magnetic inhomogeneities are presented.

Mullan, Dermott J.

1987-01-01

325

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

326

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

327

Mining Implementation Recipes of Framework-Provided Concepts in Dynamic Framework API Interaction Traces  

E-print Network

called FUDA (Framework API Understanding through Dynamic Analysis). The main idea of this technique, we present the prototype implementation of FUDA as two Eclipse plug-ins, and use them to generate, Frame- work Comprehension, FUDA, Dynamic Slicing, Clustering, Data Mining. 1. Introduction Object

Czarnecki, Krzysztof

328

"The Integrity and Obstinacy of Intellectual Creations": Jurgen Habermas and Librarianship's Theoretical Literature  

ERIC Educational Resources Information Center

Librarianship and library and information science (LIS) have long struggled with an ongoing lack of a theoretical and epistemological basis. There have been renewed efforts to explore various theoretical and philosophical positions and their meaning for librarianship and LIS research. This article explores the framework that Jurgen Habermas offers…

Buschman, John

2006-01-01

329

Military defense strategies: An inspiration from game theoretic analysis of the immune defense  

Microsoft Academic Search

Based on our early studies on passive versus aggressive strategies, this paper proposes immune defense inspired game theoretic strategies for military defense. Similarities between the immune system and the military operations have been explored under a game theoretic framework and formulated as a min-max optimal control problem. This paper expands the early studies and offers detailed analysis of our predicted

Sharon Bewick; Jing Wu; William Hamel; Mingjun Zhang

2010-01-01

330

Theoretical Development, Factorial Validity, and Reliability of the Online Graduate Mentoring Scale  

ERIC Educational Resources Information Center

In this study, we sought to confirm the theoretical framework underlying an Online Graduate Mentoring Scale by establishing the scale's factorial validity and reliability. Analysis of data received from doctoral students and alumni/ae of the College of Education of one large, online, accredited university reduced the initial theoretical

Crawford, Linda M.; Randolph, Justus J.; Yob, Iris M.

2014-01-01

331

Theoretical estimation of shifts of methane lines in the v4 band  

NASA Astrophysics Data System (ADS)

The principal purpose of the present study is to obtain the approximate theoretical estimation of pressure-induced line shift coefficients in the (nu) 4 band of CH4. A theoretical formulation is presented within the framework of Anderson-Tsao-Curnutte theory for calculation of pressure-shifts of F-species spectral lines.

Lavrentjeva, N. N.; Saveljev, Vladimir N.

1994-01-01

332

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

333

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

334

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

335

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

336

Healthcare Information Framework.  

PubMed

CEN committee TC 251 Medical Informatics, has set up a project team charged with producing a European pre-standard ENV on Healthcare Information Framework (HIF). The HIF is based on abstraction from a specific information system architecture to a reference architecture and further to a conceptual architectural framework based on serving open, distributed and heterogeneous healthcare enterprises. To specify the suitable healthcare information system architecture modelling of the healthcare enterprise is required. As there is no one method serving all needs, the HIF gives guidance on what aspects to look at in selecting a suitable modelling method. It is expected that the work will be completed by early 1995. PMID:7601549

Saranummi, N; Demeester, M; Fernandez Perez de Talens, A; Harrington, J; Heimly, V; de la Riva Grandal, J M; Taylor, J

1995-04-01

337

Journal of Theoretical Biology ] (  

E-print Network

bluefin tuna movements: An analysis based on net displacement and length of track Ryan Gutenkunsta 16 October 2006 Abstract We use observed movement tracks of Atlantic bluefin tuna in the Gulf, we estimate that, on average, bluefin tuna in the Gulf of Maine encounter a resource patch every 2 h

Keshet, Leah

338

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

339

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

340

Everything Is Connected: Giftedness within a Broad Framework for Cognition  

ERIC Educational Resources Information Center

Ziegler and Phillipson (Z&P) have provided a valuable discussion of the identification and development of giftedness under a systemic umbrella, including issues of differing theoretical approaches and efficacy. This commentary considers their discussion within a novel systemic framework that links also individuals and environment, but in terms of…

Woolcott, Geoff

2012-01-01

341

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

342

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

343

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

344

Computational Capabilities of Soft-Computing Frameworks: An Overview  

Microsoft Academic Search

In theoretical computer science, it is well-established fact that Turing model (and its equivalent models like Chomsky's phrase structured grammar model, or recursively enumerable functions) is a most general model for computation. Many biologically inspired computing paradigms such as traditional neural networks, genetic algorithms, evolutionary computing frameworks etc., aim at addressing the problem of automatic generation of algorithmic solutions for

Narendra S. Chaudhari; Yew-soon Ong; Veena Trivedi

2006-01-01

345

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

346

A passivity-based framework for resilient cyber physical systems  

Microsoft Academic Search

Resilient control systems play a special role in the area of cyber-physical systems, where the design must address the question how complex dynamic plants are to be controlled safely and reliably when a control system is under a cyber attack. In this paper we describe a control theoretical framework based on the concept of passivity for designing a control network

Nicholas Kottenstette; Gabor Karsai; Janos Sztipanovits

2009-01-01

347

Mapping and monitoring potato cropping systems in Maine: geospatial methods and land use assessments  

Technology Transfer Automated Retrieval System (TEKTRAN)

Geospatial frameworks and GIS-based approaches were used to assess current cropping practices in potato production systems in Maine. Results from the geospatial integration of remotely-sensed cropland layers (2008-2011) and soil datasets for Maine revealed a four-year potato systems footprint estima...

348

Virtual Mission Operation Framework (VMOF)  

NASA Technical Reports Server (NTRS)

The Virtual Mission Operation Framework (VMOF) is one of the project lifecycle engineering process improvement efforts initiated by the institutional technology infrastructure program at JPL. The VMOF is composed of three frameworks: a model integration framework, a simulation framework, and a visualization framework. The model integration framework interfaces with spacecraft system design, mission design, and structure design. The simulation framework interfaces with the operation scenario design, environmental phenomena science, and science payload system design. The visualization framework interfaces with the flight system testbed, the ground system, and the science analysis. The three frameworks of the VMOF collaborate to create a comprehensive virtual mission operation that enables a "validation-in-the-loop" system design process and lifecycle-continuous science-return validation.This paper discusses the technical approaches for each framework implementation, challenges and approaches involved in streamlining mission information access, and on-going activities toward enabling Model-Based Engineering Design in a collaborative distributed environment.

Lee, Meemong; Weidner, Richard J.

2004-01-01

349

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

Federal Register 2010, 2011, 2012, 2013, 2014

...TREASURY Office of Thrift Supervision [AC-38: OTS Nos. 06947 and H 4709] Savings Bank of Maine, MHC and Savings Bank of Maine, Gardiner, Maine; Approval of Conversion Application Notice is hereby given that on May 7, 2010, the...

2010-05-18

350

Space Shuttle Main Engine performance analysis  

NASA Technical Reports Server (NTRS)

For a number of years, NASA has relied primarily upon periodically updated versions of Rocketdyne's power balance model (PBM) to provide space shuttle main engine (SSME) steady-state performance prediction. A recent computational study indicated that PBM predictions do not satisfy fundamental energy conservation principles. More recently, SSME test results provided by the Technology Test Bed (TTB) program have indicated significant discrepancies between PBM flow and temperature predictions and TTB observations. Results of these investigations have diminished confidence in the predictions provided by PBM, and motivated the development of new computational tools for supporting SSME performance analysis. A multivariate least squares regression algorithm was developed and implemented during this effort in order to efficiently characterize TTB data. This procedure, called the 'gains model,' was used to approximate the variation of SSME performance parameters such as flow rate, pressure, temperature, speed, and assorted hardware characteristics in terms of six assumed independent influences. These six influences were engine power level, mixture ratio, fuel inlet pressure and temperature, and oxidizer inlet pressure and temperature. A BFGS optimization algorithm provided the base procedure for determining regression coefficients for both linear and full quadratic approximations of parameter variation. Statistical information relative to data deviation from regression derived relations was also computed. A new strategy for integrating test data with theoretical performance prediction was also investigated. The current integration procedure employed by PBM treats test data as pristine and adjusts hardware characteristics in a heuristic manner to achieve engine balance. Within PBM, this integration procedure is called 'data reduction.' By contrast, the new data integration procedure, termed 'reconciliation,' uses mathematical optimization techniques, and requires both measurement and balance uncertainty estimates. The reconciler attempts to select operational parameters that minimize the difference between theoretical prediction and observation. Selected values are further constrained to fall within measurement uncertainty limits and to satisfy fundamental physical relations (mass conservation, energy conservation, pressure drop relations, etc.) within uncertainty estimates for all SSME subsystems. The parameter selection problem described above is a traditional nonlinear programming problem. The reconciler employs a mixed penalty method to determine optimum values of SSME operating parameters associated with this problem formulation.

Santi, L. Michael

1993-01-01

351

Space Shuttle Main Engine performance analysis  

NASA Astrophysics Data System (ADS)

For a number of years, NASA has relied primarily upon periodically updated versions of Rocketdyne's power balance model (PBM) to provide space shuttle main engine (SSME) steady-state performance prediction. A recent computational study indicated that PBM predictions do not satisfy fundamental energy conservation principles. More recently, SSME test results provided by the Technology Test Bed (TTB) program have indicated significant discrepancies between PBM flow and temperature predictions and TTB observations. Results of these investigations have diminished confidence in the predictions provided by PBM, and motivated the development of new computational tools for supporting SSME performance analysis. A multivariate least squares regression algorithm was developed and implemented during this effort in order to efficiently characterize TTB data. This procedure, called the 'gains model,' was used to approximate the variation of SSME performance parameters such as flow rate, pressure, temperature, speed, and assorted hardware characteristics in terms of six assumed independent influences. These six influences were engine power level, mixture ratio, fuel inlet pressure and temperature, and oxidizer inlet pressure and temperature. A BFGS optimization algorithm provided the base procedure for determining regression coefficients for both linear and full quadratic approximations of parameter variation. Statistical information relative to data deviation from regression derived relations was also computed. A new strategy for integrating test data with theoretical performance prediction was also investigated. The current integration procedure employed by PBM treats test data as pristine and adjusts hardware characteristics in a heuristic manner to achieve engine balance. Within PBM, this integration procedure is called 'data reduction.' By contrast, the new data integration procedure, termed 'reconciliation,' uses mathematical optimization techniques, and requires both measurement and balance uncertainty estimates. The reconciler attempts to select operational parameters that minimize the difference between theoretical prediction and observation. Selected values are further constrained to fall within measurement uncertainty limits and to satisfy fundamental physical relations (mass conservation, energy conservation, pressure drop relations, etc.) within uncertainty estimates for all SSME subsystems. The parameter selection problem described above is a traditional nonlinear programming problem. The reconciler employs a mixed penalty method to determine optimum values of SSME operating parameters associated with this problem formulation.

Santi, L. Michael

1993-11-01

352

Fair Bandwidth Sharing Algorithms based on Game Theory Frameworks for Wireless Ad-hoc Networks  

Microsoft Academic Search

This paper examines the theoretical aspects of bandwidth sharing in wireless, possibly mobile, ad-hoc networks (MANETs) through a game theoretic framework. It presents some applications to show how such a framework can be invoked to design efficient media access control protocols in a non- cooperative, self-organized, topology-blind environment as well as in environments where the competing nodes share some basic

Zuyuan Fang; Brahiin Bensaou

2004-01-01

353

Ariba: A Framework for Developing Decentralized Services  

Microsoft Academic Search

Developing new network services in the Internet is complex and costly. This high entrance barrier has prevented new innovation and has stuck the Internet as being mainly client\\/server-based. End-system based decentralized services are cheaper but more complex than centralized systems. The ariba framework aims at easy development of such decentralized services without infrastructure support. In this paper we present the

Christian Hubsch; Christoph P. Mayer; Oliver P. Waldhorst

354

Exploring the Science Framework  

ERIC Educational Resources Information Center

The National Research Council's recent publication "A Framework for K-12 Science Education: Practices, Crosscutting Concepts, and Core Ideas" (NRC 2011), which is the foundation for the Next Generation Science Standards now being developed, places unprecedented focus on the practices involved in doing scientific and engineering work. In an effort…

Bell, Philip; Bricker, Leah; Tzou, Carrie; Lee, Tiffany; Van Horne, Katie

2012-01-01

355

Exploring the Science Framework  

ERIC Educational Resources Information Center

The vision for science education set forth in "A Framework for K-12 Science Education" (NRC 2012) makes it clear that for today's students to become the scientifically literate citizens of tomorrow, their educational experiences must help them become mathematically proficient. "The focus here is on important practices, such as modeling, developing…

Mayes, Robert; Koballa, Thomas R., Jr.

2012-01-01

356

Exploring the Science Framework  

ERIC Educational Resources Information Center

The vision for science education set forth in "A Framework for K-12 Science Education" (NRC 2012) makes it clear that for today's students to become the scientifically literate citizens of tomorrow their educational experiences must help them become mathematically proficient. "The focus here is on important practices, such as modeling, developing…

Mayes, Robert; Koballa, Thomas R., Jr.

2012-01-01

357

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

358

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

359

21 CFR 808.69 - Maine.  

Code of Federal Regulations, 2014 CFR

... 8 2014-04-01 2014-04-01 false Maine. 808.69 Section 808.69 Food and Drugs...Specific State and Local Exemptions § 808.69 Maine. (a) The following Maine medical device requirement is enforceable...

2014-04-01

360

78 FR 34701 - Maine Disaster #ME-00037  

Federal Register 2010, 2011, 2012, 2013, 2014

...Disaster Declaration 13594 and 13595] Maine Disaster ME-00037 AGENCY: U.S...declaration of a disaster for the State of Maine dated 05/30/2013. Incident: Commercial...Androscoggin. Contiguous Counties: Maine: Cumberland, Franklin, Kennebec,...

2013-06-10

361

21 CFR 808.69 - Maine.  

Code of Federal Regulations, 2012 CFR

... 8 2012-04-01 2012-04-01 false Maine. 808.69 Section 808.69 Food and Drugs...Specific State and Local Exemptions § 808.69 Maine. (a) The following Maine medical device requirement is enforceable...

2012-04-01

362

21 CFR 808.69 - Maine.  

Code of Federal Regulations, 2013 CFR

... 8 2013-04-01 2013-04-01 false Maine. 808.69 Section 808.69 Food and Drugs...Specific State and Local Exemptions § 808.69 Maine. (a) The following Maine medical device requirement is enforceable...

2013-04-01

363

75 FR 22167 - Maine Disaster #ME-00025  

Federal Register 2010, 2011, 2012, 2013, 2014

...Disaster Declaration 12126 and 12127] Maine Disaster ME-00025 AGENCY: U.S...declaration of a disaster for the State of MAINE dated 04/19/2010. Incident: Severe...Counties: York. Contiguous Counties: Maine: Cumberland, Oxford. New...

2010-04-27

364

21 CFR 808.69 - Maine.  

Code of Federal Regulations, 2011 CFR

... 8 2011-04-01 2011-04-01 false Maine. 808.69 Section 808.69 Food and Drugs...Specific State and Local Exemptions § 808.69 Maine. (a) The following Maine medical device requirement is enforceable...

2011-04-01

365

78 FR 34701 - Maine Disaster #ME-00036  

Federal Register 2010, 2011, 2012, 2013, 2014

...Disaster Declaration 13592 and 13593] Maine Disaster ME-00036 AGENCY: U.S...declaration of a disaster for the State of Maine dated 05/30/2013. Incident: Apartment...Androscoggin. Contiguous Counties: Maine: Cumberland, Franklin, Kennebec,...

2013-06-10

366

21 CFR 808.69 - Maine.  

Code of Federal Regulations, 2010 CFR

... 8 2010-04-01 2010-04-01 false Maine. 808.69 Section 808.69 Food and Drugs...Specific State and Local Exemptions § 808.69 Maine. (a) The following Maine medical device requirement is enforceable...

2010-04-01

367

Tinkering at the main-ring lattice  

SciTech Connect

To improve production of usable antiprotons using the proton beam from the main ring and the lossless injection of cooled antiprotons into the main ring, modifications of the main ring lattice are recommended.

Ohnuma, S.

1982-08-23

368

Adventure Learning and Learner-Engagement: Frameworks for Designers and Educators  

ERIC Educational Resources Information Center

There is a recognized need for theoretical frameworks that can guide designers and educators in the development of engagement-rich learning experiences that incorporate emerging technologies in pedagogically sound ways. This study investigated one such promising framework, adventure learning (AL). Data were gathered via surveys, interviews, direct…

Henrickson, Jeni; Doering, Aaron

2013-01-01

369

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

370

A framework for designing assistive technologies for teaching children with ASDs emotions  

Microsoft Academic Search

This paper presents a theory-driven serious game design framework for teaching emotions to children with autism spectrum disorders (ASDs). The framework is based on the integration of two theoretical models, Kolb's experiential learning model and Piaget's cognitive development model. Based on these theories, we extracted six essential elements (factors) for designing games (and other assistive technologies) to teach children with

Ji Hyun Park; Bretagne Abirached; Yan Zhang

2012-01-01

371

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

372

Integrating learning assessment and supervision in a competency framework for clinical workplace education.  

PubMed

Although competency-based education is well established in health care education, research shows that the competencies do not always match the reality of clinical workplaces. Therefore, there is a need to design feasible and evidence-based competency frameworks that fit the workplace reality. This theoretical paper outlines a competency-based framework, designed to facilitate learning, assessment and supervision in clinical workplace education. Integration is the cornerstone of this holistic competency framework. PMID:25497139

Embo, M; Driessen, E; Valcke, M; van der Vleuten, C P M

2015-02-01

373

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

374

Theoretical status of the muon g-2  

E-print Network

We review the present status of the theoretical evaluation of the anomalous magnetic moment of the the muon within the Standard Model. We mainly focus on the hadronic contributions in the muon g-2 due to vacuum polarization effects, light-by-light scattering and higher order electroweak corrections. We discuss some recent calculations together with their uncertainties and limitations and point out possible improvements in the future. In view of the inconsistent values for the hadronic vacuum polarization based on e^+ e^- and tau data, no conclusion can be drawn yet, whether the apparent discrepancy between the current experimental and theoretical values for the muon g-2 points to physics beyond the Standard Model.

Andreas Nyffeler

2003-05-13

375

A framework for biodynamic feedthrough analysis--part II: validation and application.  

PubMed

Biodynamic feedthrough (BDFT) is a complex phenomenon, that has been studied for several decades. However, there is little consensus on how to approach the BDFT problem in terms of definitions, nomenclature, and mathematical descriptions. In this paper, the framework for BDFT analysis, as presented in Part I of this dual publication, is validated and applied. The goal of this framework is twofold. First of all, it provides some common ground between the seemingly large range of different approaches existing in BDFT literature. Secondly, the framework itself allows for gaining new insights into BDFT phenomena. Using recently obtained measurement data, parts of the framework that were not already addressed elsewhere, are validated. As an example of a practical application of the framework, it will be demonstrated how the effects of control device dynamics on BDFT can be understood and accurately predicted. Other ways of employing the framework are illustrated by interpreting the results of three selected studies from the literature using the BDFT framework. The presentation of the BDFT framework is divided into two parts. This paper, Part II, addresses the validation and application of the framework. Part I, which is also published in this journal issue, addresses the theoretical foundations of the framework. The work is presented in two separate papers to allow for a detailed discussion of both the framework's theoretical background and its validation. PMID:25137695

Venrooij, Joost; van Paassen, Marinus M; Mulder, Mark; Abbink, David A; Mulder, Max; van der Helm, Frans C T; Bulthoff, Heinrich H

2014-09-01

376

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

377

Theoretical fluid dynamics  

NASA Astrophysics Data System (ADS)

This book is concerned with a discussion of the dynamical behavior of a fluid, and is addressed primarily to graduate students and researchers in theoretical physics and applied mathematics. A review of basic concepts and equations of fluid dynamics is presented, taking into account a fluid model of systems, the objective of fluid dynamics, the fluid state, description of the flow field, volume forces and surface forces, relative motion near a point, stress-strain relation, equations of fluid flows, surface tension, and a program for analysis of the governing equations. The dynamics of incompressible fluid flows is considered along with the dynamics of compressible fluid flows, the dynamics of viscous fluid flows, hydrodynamic stability, and dynamics of turbulence. Attention is given to the complex-variable method, three-dimensional irrotational flows, vortex flows, rotating flows, water waves, applications to aerodynamics, shock waves, potential flows, the hodograph method, flows at low and high Reynolds numbers, the Jeffrey-Hamel flow, and the capillary instability of a liquid jet.

Shivamoggi, B. K.

378

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

379

The Maine Coastal Current: Spring Climatological Circulation  

E-print Network

The Maine Coastal Current: Spring Climatological Circulation Daniel R. Lynch, Monica J. Holboke in the Gulf of Maine, with special emphasis on its coastal current in the periods March­April and May of Maine cyclonic circulation is persistent, with significant bimonthly modulation of key Maine Coastal

380

Implementation techniques for main memory database systems  

Microsoft Academic Search

With the availability of very large, relatively inexpensive main memories, it is becoming possible keep large databases resident in main memory In this paper we consider the changes necessary to permit a relational database system to take advantage of large amounts of main memory We evaluate AVL vs B+-tree access methods for main memory databases, hash-based query processing strategies vs

David J DeWitt; Randy H Katz; Frank Olken; Leonard D Shapiro; Michael R Stonebraker; David A. Wood

1984-01-01

381

An intermediate framework between WIMP, FIMP, and EWIP dark matter  

SciTech Connect

WIMP (Weakly Interacting Massive Particle), FIMP (Feebly interacting Massive Particle) and EWIP (Extremely Weakly Interacting Particle) dark matter are different theoretical frameworks that have been postulated to explain the dark matter. In this paper we examine an intermediate scenario that combines features from these three frameworks. It consists of a weakly interacting particle — à la WIMP — that does not reach thermal equilibrium in the early Universe — à la FIMP — and whose relic density is determined by the reheating temperature of the Universe — à la EWIP. As an example, an explicit realization of this framework, based on the singlet scalar model of dark matter, is analyzed in detail. In particular, the relic density is studied as a function of the parameters of the model, and the new viable region within this intermediate scenario is determined. Finally, it is shown that this alternative framework of dark matter allows for arbitrarily heavy dark matter particles and that it suggests a connection between dark matter and inflation.

Yaguna, Carlos E., E-mail: carlos.yaguna@uni-muenster.de [Institut für Theoretische Physik, Universität Münster, Wilhelm-Klemm-Straße 9, D-48149 Münster (Germany)

2012-02-01

382

A Theoretical Model of Water and Trade  

NASA Astrophysics Data System (ADS)

Water is an essential factor of agricultural production. Agriculture, in turn, is globalized through the trade of food commodities. There is an extensive literature detailing the direct and local relationships between water and agricultural production. Here, we expand upon this important literature to understand how the globalized food economy interacts with water resources. In particular, we seek to understand the following questions: What is the impact of agricultural trade on water resources? How do water resources impact agricultural trade? Thus, we aim to explore the bidirectional feedbacks between water resources and food trade, using a socio-hydrologic framework. To do this, we develop a theoretical model of international trade that explicitly incorporates water resources.

Dang, Qian; Zeng, Ruije; Ling, Xiaowen; Di Baldassarre, Giuliano; Konar, Megan

2014-05-01

383

A framework for digital watercolor  

E-print Network

This research develops an extendible framework for reproducing watercolor in a digital environment, with a focus on interactivity using the GPU. The framework uses the lattice Boltzmann method, a relatively new approach to fluid dynamics...

O'Brien, Patrick Michael

2008-10-10

384

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.

2014-08-19

385

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

386

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

387

Domain-theoretic Solution of Differential Equations (Scalar Fields)  

Microsoft Academic Search

Abstract: We provide an algorithmic formalization of ordinarydierential equations in the framework of domaintheory. Given a Scott continuous, interval-valuedand time-dependent scalareld and a Scott continuousinitial function consistent with the scalareld, thedomain-theoretic analogue of the classical Picard operator,whosex-points give the solutions of the differentialequation, acts on the domain of continuouslydierentiable functions by successively updating the informationabout the...

A. Edalat; M. Krznaric; A. Lieutier

388

GRAND CHALLENGES Coordinating Theoretical and  

E-print Network

variation, the constraints on phenotypes, and the relationships between phenotypes and fitness. Theodosius Dobzhansky: Does theoretical, mathematical inves- tigation make sense unless it leads to experiments

Angilletta, Michael

389

Spatio-temporal Granger causality: a new framework  

PubMed Central

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

2015-01-01

390

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

391

Cross Support Transfer Service (CSTS) Framework Library  

NASA Technical Reports Server (NTRS)

Within the Consultative Committee for Space Data Systems (CCSDS), there is an effort to standardize data transfer between ground stations and control centers. CCSDS plans to publish a collection of transfer services that will each address the transfer of a particular type of data (e.g., tracking data). These services will be called Cross Support Transfer Services (CSTSs). All of these services will make use of a common foundation that is called the CSTS Framework. This library implements the User side of the CSTS Framework. "User side" means that the library performs the role that is typically expected of the control center. This library was developed in support of the Goddard Data Standards program. This technology could be applicable for control centers, and possibly for use in control center simulators needed to test ground station capabilities. The main advantages of this implementation are its flexibility and simplicity. It provides the framework capabilities, while allowing the library user to provide a wrapper that adapts the library to any particular environment. The main purpose of this implementation was to support the inter-operability testing required by CCSDS. In addition, it is likely that the implementation will be useful within the Goddard mission community (for use in control centers).

Ray, Timothy

2014-01-01

392

The ATLAS DDM Tracer monitoring framework  

NASA Astrophysics Data System (ADS)

The DDM Tracer monitoring framework is aimed to trace and monitor the ATLAS file operations on the Worldwide LHC Computing Grid. The volume of traces has increased significantly since the framework was put in production in 2009. Now there are about 5 million trace messages every day and peaks can be near 250Hz, with peak rates continuing to climb, which gives the current structure a big challenge. Analysis of large datasets based on on-demand queries to the relational database management system (RDBMS), i.e. Oracle, can be problematic, and have a significant effect on the database's performance. Consequently, We have investigated some new high availability technologies like messaging infrastructure, specifically ActiveMQ, and key-value stores. The advantages of key value store technology are that they are distributed and have high scalability; also their write performances are usually much better than RDBMS, all of which are very useful for the Tracer monitoring framework. Indexes and distributed counters have been also tested to improve query performance and provided almost real time results. In this paper, the design principles, architecture and main characteristics of Tracer monitoring framework will be described and examples of its usage will be presented.

Zang, Dongsong; Garonne, Vincent; Barisits, Martin; Lassnig, Mario; Stewart, Graeme Andrew; Molfetas, Angelos; Beermann, Thomas

2012-12-01

393

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

394

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

395

Covalent organic frameworks.  

PubMed

Covalent organic frameworks (COFs) are a class of crystalline porous polymers that allow the atomically precise integration of organic units to create predesigned skeletons and nanopores. They have recently emerged as a new molecular platform for designing promising organic materials for gas storage, catalysis, and optoelectronic applications. The reversibility of dynamic covalent reactions, diversity of building blocks, and geometry retention are three key factors involved in the reticular design and synthesis of COFs. This tutorial review describes the basic design concepts, the recent synthetic advancements and structural studies, and the frontiers of functional exploration. PMID:22821129

Feng, Xiao; Ding, Xuesong; Jiang, Donglin

2012-09-21

396

Theoretical horizontal-branch evolution  

NASA Technical Reports Server (NTRS)

The general features of the theoretical evolution of canonical horizontal-branch (HB) stars are briefly reviewed with specific emphasis on the track morphology in the HR diagram and the determination of the globular cluster helium abundance. The observational evidence for the occurrence of semiconvection is discussed together with some remaining theoretical uncertainty.

Sweigart, Allen V.

1987-01-01

397

[Theoretic medicine in Egypt].  

PubMed

Egyptian medical writings - especially those surviving on papyri - provide a rich material for historical research. They did not only serve the memory of old healing methods and practices, but that of contemporary medical theories and views as well. On the one hand, Egyptians knew illnesses caused by factors physicians could easily identify by mere empirism, or by their anatomical or physiological knowledge. (Their main physiological theory was probably based on the idea of specific materials circulating through a system of canals (mtw) in the body. It produced illness, either by the system being blocked, or by its original materials changed into the pathogenic material (wxdw). On the other hand however, they supposed the existence of illnesses, caused by the activity of supernatural forces or demons. The two different but parallel etiologies demanded different therapies. Consequently, besides physical also magical therapies were used, and in the healing process the healer him/herself played a double role. Egyptian thinking regarded both ways of healing - the physical and the magical - as equally useful and rational. This richly documented article gives an overview of the Egyptian medical heritage, as illustrated by the original texts and objects. PMID:12800853

Györy, Hedvig

2002-01-01

398

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

399

75 FR 39993 - MAINE Disaster #ME-00026  

Federal Register 2010, 2011, 2012, 2013, 2014

...ADMINISTRATION [Disaster Declaration 12222 and 12223] MAINE Disaster ME-00026 AGENCY: U.S. Small Business Administration...a major disaster for Public Assistance Only for the State of MAINE (FEMA-- 1920--DR), dated 07/01/2010....

2010-07-13

400

75 FR 17792 - Maine Disaster # ME-00024  

Federal Register 2010, 2011, 2012, 2013, 2014

...ADMINISTRATION [Disaster Declaration 12091 and 12092] Maine Disaster ME-00024 AGENCY: U.S. Small Business Administration...a major disaster for Public Assistance only for the State of Maine (FEMA-1891- DR), dated 03/25/2010. Incident:...

2010-04-07

401

78 FR 20370 - Maine Disaster # ME-00035  

Federal Register 2010, 2011, 2012, 2013, 2014

...ADMINISTRATION [Disaster Declaration 13525 and 13526] Maine Disaster ME-00035 AGENCY: U.S. Small Business Administration...a major disaster for Public Assistance Only for the State of Maine (FEMA-4108- DR), dated 03/25/2013. Incident:...

2013-04-04

402

76 FR 7622 - Maine Disaster # ME-00028  

Federal Register 2010, 2011, 2012, 2013, 2014

...ADMINISTRATION [Disaster Declaration 12461 and 12462] Maine Disaster ME-00028 AGENCY: U.S. Small Business Administration...a major disaster for Public Assistance Only for the State of Maine (FEMA-1953- DR), dated 02/01/2011. Incident:...

2011-02-10

403

40 CFR 81.320 - Maine.  

Code of Federal Regulations, 2013 CFR

... DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES Section...otherwise noted. Maine—Ozone (1-Hour Standard)4 Designated...2001. 4 The 1-hour ozone standard is revoked...noted. Maine—1997 8-Hour Ozone NAAQS (Primary and...

2013-07-01

404

40 CFR 81.320 - Maine.  

Code of Federal Regulations, 2010 CFR

... DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES Section...otherwise noted. Maine—Ozone (1-Hour Standard)4 Designated...2001. 4 The 1-hour ozone standard is revoked... X AQCR 111 X Maine—Ozone (8-Hour Standard)...

2010-07-01

405

40 CFR 81.320 - Maine.  

Code of Federal Regulations, 2014 CFR

... DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES Section...otherwise noted. Maine—Ozone (1-Hour Standard)4 Designated...2001. 4 The 1-hour ozone standard is revoked...noted. Maine—1997 8-Hour Ozone NAAQS (Primary and...

2014-07-01

406

Space Shuttle Main Engine Flies High  

NASA Technical Reports Server (NTRS)

A Space Shuttle Main Engine is being lowered onto its handler before its journey to the test complex at Stennis Space Center. This building is where partially assembled Space Shuttle Main Engines are received and prepared for testing.

1996-01-01

407

STAR Analysis Framework  

NASA Astrophysics Data System (ADS)

The STAR collaboration has developed STAF (STAR Analysis Framework), a distributable data analysis framework based upon the software bus concept and implemented using CORBA-compliant(http://www.omg.org) C++ classes. The extended lifetime of the experiment, the prodigious quantity of data to be handled, and the number of collaborators compel us to pay special attention in software design to the maintainability, upgradability, and scalability of the analysis software for STAR. Object-oriented programming techniques provide a powerful tool for the development and maintenance of complex software systems. The emergence of the CORBA software bus standard from the Object Management Group presents a well-accepted industry standard for combining an OOP approach to software development with a software model distributed over a heterogeneous computer network. We are currently using STAF to develop analysis code on simulated data using the familiar KUIP command-line interface from CERN. We present an overview of the design of STAF, some results from our experience with the software environment, plans for distributing STAF components for event parallel processing, and for upgrading the user interface to a distributed, network-based interface using Java(tm) from Sun Microsystems, Inc.

Olson, D. L.; Tull, C. E.

1996-10-01

408

The Generalized Security Framework  

SciTech Connect

The Generalized Security Framework (GSF) consists of a set of libraries, classes, and tools that provide developers with the ability to easily secure distributed applications and collaborative environments. The GSF uses and enhances the Generic Security Services API (GSSAPI) to provide authentication, authorization, data protection, delegation, and auditing. It currently works with either DCE or Kerberos as the underlying security mechanism, and it has been designed so support for PKI can be easily added in the future. DCE/Kerberos is a scaleable, mature, robust security infrastructure embraced and accredited throughout the Nuclear Weapons Complex (NWC) for a secure collaborative modeling and simulation environment. The goal of the GSF is to provide a common security foundation that can be applied and extended to create secure distributed applications, independent of the communications protocol. The GSF provides a number of extensions that embed GSF security in specific remote communication APIs, such as Java sockets and Java RMI. The extensions have been designed and implemented in such a manner as to require minimum changes to application code in order to move from an unsecure application to a secure application. The advantage of this approach is that security can be enforced reliably and consistently since very little is required of the application developer. In this paper, the authors describe the goals, design, and implementation of the Generalized Security Framework.

Richard J. Detry; Stephen D. Kleban; Patrick C. Moore

2001-06-01

409

Analyzing LBD Methods using a General Framework  

NASA Astrophysics Data System (ADS)

This chapter provides a birds-eye view of the methods used for literature-based discovery (LBD). We study these methods with the help of a simple framework that emphasizes objects, links, inference methods, and additional knowledge sources. We consider methods from a domain independent perspective. Specifically, we review LBD research on postulating gene-disease connections, LBD systems designed for general purpose biomedical discovery goals, as well as LBD research applied to the web. Opportunities for new methods, gaps in our knowledge, and critical differences between methods are recognized when the "literature on LBD" is viewed through the scope of our framework. The main contributions of this chapter are in presenting open problems in LBD and outlining avenues for further research.

Sehgal, A. K.; Qiu, X. Y.; Srinivasan, P.

410

DNA, dichotomic classes and frame synchronization: a quasi-crystal framework.  

PubMed

In this article, we show how a new mathematical model of the genetic code can be exploited for investigating the almost periodic properties of DNA and mRNA protein-coding sequences. We present the main mathematical features of the model and highlight its connections with both number theory and group theory. The group theoretic framework presents interesting analogies with the theory of crystals. Moreover, we exploit the information provided by dichotomic classes, binary variables naturally derived from the mathematical model, in order to build statistical classifiers for retrieving and predicting the normal reading frame used by the ribosome in protein synthesis. The results show that coding sequences possess a local informational structure that can be related to frame synchronization processes. The information for retrieving the normal reading frame, which implies the existence of short-range correlations and almost periodic structures related to the organization of codons, offers an interesting analogy with the properties of quasi-crystals. From a theoretical point of view, our results might contribute to clarifying the relation between biological information and shape in nucleic acids and proteins. Also, from the point of view of applications, we present new promising tools for designing efficient algorithms for frame synchronization, which plays a crucial role in faithful synthesis of proteins. PMID:22615472

Giannerini, Simone; Gonzalez, Diego Luis; Rosa, Rodolfo

2012-06-28

411

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

412

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

413

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

414

40 CFR 81.320 - Maine.  

Code of Federal Regulations, 2012 CFR

...Environment 18 2012-07-01 2012-07-01 false Maine. 81.320 Section 81.320 Protection of Environment...Section 107 Attainment Status Designations § 81.320 Maine. Maine—TSP Designated areas Does not meet primary...

2012-07-01

415

40 CFR 81.320 - Maine.  

Code of Federal Regulations, 2011 CFR

...Environment 17 2011-07-01 2011-07-01 false Maine. 81.320 Section 81.320 Protection of Environment...Section 107 Attainment Status Designations § 81.320 Maine. Maine—TSP Designated areas Does not meet primary...

2011-07-01

416

University of Maine Office of Human Resources  

E-print Network

University of Maine Office of Human Resources EMPLOYEE AUTHORIZATION for the University of Maine Office of Human Resources to Disclose the Identity of Spouse/Domestic Partner to the New Balance Student of Human Resources ("OHR") at the University of Maine to disclose to the New Balance Student Recreation

Thomas, Andrew

417

AMERICAN LOBSTERS TAGGED BY MAINE COMMERCIAL FISHERMEN,  

E-print Network

AMERICAN LOBSTERS TAGGED BY MAINE COMMERCIAL FISHERMEN, 1957-59 In 1957 at the suggestion of C. Owen Smith, then editor of the "Maine Coast Fisherman," several commercial lobster fishermen volunteered to tag illegal American lobster, Homarus ameri- canus, with tags furnished by the Maine Depart

418

MAINE BEDROCK SOURCE WATER PROTECTION AREAS  

EPA Science Inventory

Bedrocksqpa_region_pws is a REGIONS SDE layer of bedrock source water protection areas in Maine with a high, moderate, or low probability of contributing water to community public water supplies. The Maine Drinking Water Program (MEDWP), in cooperation with the Maine Geological S...

419

A theoretical framework for land evaluation 1 Reprint of Geoderma 72 (1996) 165-202 A theoretical framework for land evaluation*  

E-print Network

of the land resource, poverty and other social problems. The land is the ultimate source of wealth maintaining the earth's ecosystems. Part of the solution to the land-use problem is land evaluation in support/or economic terms; 3. The variation is at least in part systematic, with definite and knowable causes, so that

Rossiter, D G "David"

420

Second generation registry framework  

PubMed Central

Background Information management systems are essential to capture data be it for public health and human disease, sustainable agriculture, or plant and animal biosecurity. In public health, the term patient registry is often used to describe information management systems that are used to record and track phenotypic data of patients. Appropriate design, implementation and deployment of patient registries enables rapid decision making and ongoing data mining ultimately leading to improved patient outcomes. A major bottleneck encountered is the static nature of these registries. That is, software developers are required to work with stakeholders to determine requirements, design the system, implement the required data fields and functionality for each patient registry. Additionally, software developer time is required for ongoing maintenance and customisation. It is desirable to deploy a sophisticated registry framework that can allow scientists and registry curators possessing standard computing skills to dynamically construct a complete patient registry from scratch and customise it for their specific needs with little or no need to engage a software developer at any stage. Results This paper introduces our second generation open source registry framework which builds on our previous rare disease registry framework (RDRF). This second generation RDRF is a new approach as it empowers registry administrators to construct one or more patient registries without software developer effort. New data elements for a diverse range of phenotypic and genotypic measurements can be defined at any time. Defined data elements can then be utilised in any of the created registries. Fine grained, multi-level user and workgroup access can be applied to each data element to ensure appropriate access and data privacy. We introduce the concept of derived data elements to assist the data element standards communities on how they might be best categorised. Conclusions We introduce the second generation RDRF that enables the user-driven dynamic creation of patient registries. We believe this second generation RDRF is a novel approach to patient registry design, implementation and deployment and a significant advance on existing registry systems. PMID:24982690

2014-01-01

421

Philosophical, theoretical and empirical foundations of Acceptance and Commitment Therapy  

Microsoft Academic Search

This article has two main purposes. The first one is to present the philosophical, theoretical, and empirical underpinnings of Acceptance and Commitment Therapy (ACT). The second is to outline the importance of philosophy and theory in order to build an empirical clinical psychology that copes progressively with the needs of the field. To accomplish these purposes, we have structured the

Roger Vilardaga; Steven C. Hayes; Leif Schelin

2007-01-01

422

A DOMAIN-THEORETIC APPROACH TO INTEGRATION IN HAUSDORFF SPACES  

Microsoft Academic Search

In this paper we generalize the construction of a domain-theoretic integral, introduced by Professor Abbas Edalat, in locally compact separable Hausdorff spaces, to general Hausdorff spaces embedded in a domain. Our main example of such spaces comprises general metric spaces embedded in the rounded ideal completion of the par- tially ordered set of formal balls. We go on to discuss

J. D. HOWROYD

2000-01-01

423

Devising a New Model-Driven Framework for Developing GUI for Enterprise Applications  

NASA Astrophysics Data System (ADS)

The main goal of this chapter is to demonstrate the design and development of a GUI framework that is model driven and is not directly linked to one presentation technology or any specific presentation subsystem of a certain programming language. This framework will allow us to create graphical user interfaces that are not only dynamically customizable but also multilingual. In order to demonstrate this new concept we design in this chapter a new framework called Customizable Enterprise Data Administrator (CEDAR). Additionally, we build a prototype of this framework and a technology-dependent engine which would transform the output of our framework into a known presentation technology.

Akiki, Pierre

424

The hyper-cube framework for ant colony optimization.  

PubMed

Ant colony optimization is a metaheuristic approach belonging to the class of model-based search algorithms. In this paper, we propose a new framework for implementing ant colony optimization algorithms called the hyper-cube framework for ant colony optimization. In contrast to the usual way of implementing ant colony optimization algorithms, this framework limits the pheromone values to the interval [0,1]. This is obtained by introducing changes in the pheromone value update rule. These changes can in general be applied to any pheromone value update rule used in ant colony optimization. We discuss the benefits coming with this new framework. The benefits are twofold. On the theoretical side, the new framework allows us to prove that in Ant System, the ancestor of all ant colony optimization algorithms, the average quality of the solutions produced increases in expectation over time when applied to unconstrained problems. On the practical side, the new framework automatically handles the scaling of the objective function values. We experimentally show that this leads on average to a more robust behavior of ant colony optimization algorithms. PMID:15376861

Blum, Christian; Dorigo, Marco

2004-04-01

425

Discrimination, objectification, and dehumanization: toward a pantheoretical framework.  

PubMed

In this chapter, I have called for greater attention to targets' experiences in theory and research on dehumanization. I have also argued that what we know from theory and research on targets' experiences of stigma and discrimination can inform how we pursue the understanding of targets' experiences of dehumanization. To this end, I have emphasized the utility of attention to the intersectionality of minority statuses in shaping discrimination experiences. I have also described theoretical frameworks grounded in different populations' experiences--including theories of discrimination as stressful life events or daily hassles, minority stress frameworks, and objectification theory--and offered examples of integrating these frameworks as a way to attend to intersectionality. As well, I have noted parallels between the areas of convergence across discrimination theories and emerging findings regarding the consequences of dehumanization for targets. Finally, I have described the broad outlines of a pantheoretical framework that reflects areas of convergence and complementary integration across the discrimination and dehumanization literatures. My hope is that this framework will encourage further attention to the potential distinctions between internalization and cognizance of discrimination, exploration of their potentially distinctive intermediary consequences, and consideration of a broader range of outcomes beyond individual health and well-being indicators, and including individual and collective social activism. I also hope that readers will contribute to the critical evaluation and refinement of this pantheoretical framework with continued attention to the intersectionality that characterizes people's identities and experiences of discrimination. PMID:23947282

Moradi, Bonnie

2013-01-01

426

A Framework for Efficient and Composable Oblivious Transfer  

Microsoft Academic Search

We propose a simple and general framework for constructing oblivious transfer (OT) protocols that are efficient, universally composable, and generally realizable under any one of a variety of standard number- theoretic assumptions, including the decisional Diffie-Hellman assumption, the quadratic residuosity and decisional composite residuosity assumptions, and worst-case lattice assumptions. Our OT protocols are round-optimal (one message each way), quite efficient

Chris Peikert; Vinod Vaikuntanathan; Brent Waters

2008-01-01

427

Market-oriented sustainability: a conceptual framework and propositions  

Microsoft Academic Search

Utilizing Resource-Advantage Theory as the underlying theoretical foundation and drawing on literature from a variety of disciplines,\\u000a we develop a market-oriented sustainability framework. By incorporating sustainability into market orientation, the goal of\\u000a strategic alignment of sustainability with marketing strategies is achieved to create a competitive advantage. Three constructs\\u000a identified in the model are DNA, stakeholder involvement, and performance management. These

Victoria L. Crittenden; William F. Crittenden; Linda K. Ferrell; O. C. Ferrell; Christopher C. Pinney

2011-01-01

428

Main principles and practices in leader development  

Microsoft Academic Search

Purpose – Aims to present a conceptual framework for understanding how leaders develop. Design\\/methodology\\/approach – The arguments are derived from the assumption that leadership, like many other human manifestations, is a function of a given potential, relevant motivation, and ongoing developmental processes. It is argued that three developmental psychological principles are essential for leaders' development, i.e. experiential learning, vicarious learning,

Micha Popper

2005-01-01

429

Framework forensic examination computer systems.  

E-print Network

??This thesis discusses the features and requirements of a computationally intelligent computer forensic system. By introducing a novel concept, "Case-Relevance", a computationally intelligent forensic framework… (more)

Gong, Ruibin.

2008-01-01

430

Womanist ways of knowing: theoretical considerations for research with African American women.  

PubMed

Research designs that are congruent with theoretical frameworks of African American women are important. However, many researchers remain unfamiliar with womanist thought or are unsure of how it can be used to inform specific aspects of research design. The article explicates a womanist epistemologic framework that can undergird the development of intervention designs aimed at assisting African American women incorporate health-promoting behaviors into their lives. PMID:10711803

Banks-Wallace, J

2000-03-01

431

The Human Condition and the Gift: Towards a Theoretical Perspective on Close Relationships  

Microsoft Academic Search

Hannah Arendt’s exposition of the human condition provides the basic framework for a theoretical perspective on close relationships.\\u000a According to Arendt, the human condition is comprised of three modes of activity: labor, work, and action. Labor is need-driven\\u000a behavior, work concerns goal-directed activity and the fabrication of things, and action involves the mutual validation of\\u000a unique individuals. Within this framework,

Nathan Miczo

2008-01-01

432

77 FR 48565 - Maine Yankee Atomic Power Company, Maine Yankee Independent Spent Fuel Storage Installation...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Nos. 50-309 and 72-30; NRC-2012-0189] Maine Yankee Atomic Power Company, Maine Yankee Independent Spent Fuel Storage Installation, Exemption--Staff Evaluation 1.0 Background Maine Yankee Atomic Power Company (MY, the...

2012-08-14

433

77 FR 12909 - Eastern Maine Railway Company-Acquisition and Operation Exemption-Montreal, Maine & Atlantic...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Surface Transportation Board [Docket No. FD 35588] Eastern Maine Railway Company--Acquisition and Operation Exemption--Montreal, Maine & Atlantic Railway, Ltd. Eastern Maine Railway Company (EMR), a Class III rail carrier, has...

2012-03-02

434

Time-dependent deformation of gas shales - role of rock framework versus reservoir fluids  

NASA Astrophysics Data System (ADS)

Hydraulic fracturing operations are generally performed to achieve a fast, drastic increase of permeability and production rates. Although modeling of the underlying short-term mechanical response has proven successful via conventional geomechanical approaches, predicting long-term behavior is still challenging as the formation interacts physically and chemically with the fluids present in-situ. Recent experimental work has shown that shale samples subjected to a change in effective stress deform in a time-dependent manner ("creep"). Although the magnitude and nature of this behavior is strongly related to the composition and texture of the sample, also the choice of fluid used in the experiments affects the total strain response - strongly adsorbing fluids result in more, recoverable creep. The processes underlying time-dependent deformation of shales under in-situ stresses, and the long-term impact on reservoir performance, are at present poorly understood. In this contribution, we report triaxial mechanical tests, and theoretical/thermodynamic modeling work with the aim to identify and describe the main mechanisms that control time-dependent deformation of gas shales. In particular, we focus on the role of the shale solid framework versus the type and pressure of the present pore fluid. Our experiments were mainly performed on Eagle Ford Shale samples. The samples were subjected to cycles of loading and unloading, first in the dry state, and then again after equilibrating them with (adsorbing) CO2 and (non-adsorbing) He at fluid pressures of 4 MPa. Stresses were chosen close to those persisting under in-situ conditions. The results of our tests demonstrate that likely two main types of deformation mechanisms operate that relate to a) the presence of microfractures as a dominating feature in the solid framework of the shale, and b) the adsorbing potential of fluids present in the nanoscale voids of the shale. To explain the role of adsorption in the observed compaction creep, we postulate a serial coupling between 1) stress-driven desorption of the fluid species, 2) diffusion of the desorbed species out of the solid, and 3) consequent shrinkage. We propose a model in which the total shrinkage of the solid (Step 3) that is measured as bulk compaction, is driven by a change in stress state (Step 1), and evolves in time controlled by the diffusion characteristics of the system (Step 2). Our experimental and modeling study shows that both the nature of the solid framework of the shale, as well as the type and pressure of pore fluids affect the long-term in-situ mechanical behavior of gas shale reservoirs.

Hol, Sander; Zoback, Mark

2013-04-01

435

Algorithms for real-time fault detection of the Space Shuttle Main Engine  

Microsoft Academic Search

This paper reports on the results of a program to develop and demonstrate concepts related to a realtime health management system (HMS) for the Space Shuttle Main Engine (SSME). An HMS framework was developed on the basis of a top-down analysis of the current rocket engine failure modes and the engine monitoring requirements. One result of Phase I of this

C. A. Ruiz; M. W. Hawman; W. S. Galinaitis

1992-01-01

436

A MODELING STUDY OF WATER QUALITY IN MAIN CHANNEL AND ESTUARINE WETLAND  

Microsoft Academic Search

A simple computation framework is applied to include estuarine wetland and their interaction with main channels in estuarine modeling. The concept and the model implementation of the scheme are explained using a vertical two-dimensional model of estuarine hydrodynamics and water quality. The model was applied to the Tanshui River estuary and Kuan-Du wetland. The model is calibrated and verified by

Wen-Cheng Liu; Ming-Hsi Hsu; Albert Y. Kuo

2001-01-01

437

A framework for plot control in interactive story systems  

SciTech Connect

This paper presents a framework for plot control in interactive story systems. In this framework, the user takes the place of the main character of the story, the protagonist. The rest of the cast consists of discrete characters, each playing a specific role in the story. A separate module in this system, the plot manager, controls the behavior of the cast and specifies what the protagonist can do. The story plot is dynamically shaped by the interference between cast members and their social interactions. The system accepts as input a story map which provides the main metaphor for organizing the plot and localizes the interaction of the protagonist with the rest of the cast. We are implementing this framework in PEGASUS, an interactive travel story environment for Greek mythology.

Sgouros, N.M.; Papakonstantinou, G.; Tsanakas, P. [National Technical Univ. of Athens, Zographou Campus (Greece)

1996-12-31

438

TARGET ARTICLE An Evolutionary Life History Framework for Psychopathology  

E-print Network

, Brizio, & Elena, 2010), borderline personality disorder (Brune, Ghiassi, & Ribbert, 2010), attention a general framework for the evolutionary analysis of mental disorders based on the concepts of life history between fast spectrum and slow spectrum disorders. I describe four main causal pathways from life history

Crespi, Bernard J.

439

A scheduling framework for system-level estimation  

Microsoft Academic Search

This paper presents the first main task of a new system estimation framework for codesign located before the partitioning and architectural estimation steps. The key issue of the proposed method is a dynamic estimation at an abstract level (without architectural target) based on a global estimation algorithm. The proposed algorithm, addresses a given function extracted from a complex application. It

Y. Le Moullec; J. P. Diguet; J. L. Philippe

2000-01-01

440

A Semanticbased Framework for Contextaware Pedestrian Guiding Services  

E-print Network

: {bikakis, patkos, antoniou, mgp, dp}@ics.forth.gr services. Integrating web ontology languages with context a framework for building location aware applications that use Semantic Web tech­ nologies and advanced from the Semantic Web and Ubiquitous Computing do­ mains. The objective is to explore the intelligent

441

Foreign Policy & Morality: Framework for a Moral Audit.  

ERIC Educational Resources Information Center

Two papers and several commentaries discuss a viable moral framework for foreign policy. It is hoped that the thought of some of the world's major thinkers can provide at least the foundations for a more enduring approach to the issues of political morality. The two main papers are by Father Theodore M. Hesburgh, C.S.C., president of the…

Hesburgh, Theodore M.; Halle, Louis J.

442

BIOLOGICAL FRAMEWORKS FOR ENGINEERS Laboratory Experience #3 [Skeletal Muscle Biomechanics  

E-print Network

physiologic range of muscle lengths and arm positions. Study inverse relationship between load and velocity in muscle. Central Framework: Muscle strength is dictated by both the length-tension relationship mechanism. There are two main determinants of muscle strength. The first is the length-tension relationship

Sniadecki, Nathan J.

443

BIOLOGICAL FRAMEWORKS FOR ENGINEERS Laboratory Experience #3 [Skeletal Muscle Biomechanics  

E-print Network

physiologic range of muscle lengths and arm positions. Study inverse relationship between load and velocity in muscle. Central Framework: Muscle strength is dictated by the length-tension and velocity contraction through a ratcheting mechanism. There are two main determinants of muscle strength. The first

Sniadecki, Nathan J.

444

Conceptual Change from the Framework Theory Side of the Fence  

ERIC Educational Resources Information Center

We describe the main principles of the framework theory approach to conceptual change and briefly report on the results of a text comprehension study that investigated some of the hypotheses that derive from it. We claim that children construct a naive physics which is based on observation in the context of lay culture and which forms a relatively…

Vosniadou, Stella; Skopeliti, Irini

2014-01-01

445

A FRAMEWORK FOR SONIFICATION OF VICON MOTION CAPTURE DATA  

Microsoft Academic Search

This paper describes experiments on sonifying data obtained using the VICON motion capture system. The main goal is to build the necessary infrastructure in order to be able to map motion parameters of the human body to sound. For sonification the following three software frameworks were used: Marsyas, tradi- tionally used for music information retrieval with audio analysis and synthesis,

Ajay Kapur; George Tzanetakis; Naznin Virji-Babul; Ge Wang; Perry R. Cook

2005-01-01

446

HANet: a framework toward ultimately reliable network services  

Microsoft Academic Search

High availability is becoming an essential part of network services because even a little downtime may lead to a great loss of money. According to previous research, network failure is one of the major causes of system unavailability. In this paper, we propose a framework called HANet for building highly available network services. The main goal of HANet is to

Ying-jie Jiang; Da-wei Chang; Ruei-chuan Chang

2005-01-01

447

Proactive or Reactive Routing: A Unified Analytical Framework in MANETs  

E-print Network

- formance evaluation of proactive and reactive routing protocols operating in mobile ad hoc networks (MANETs-event simulations. I. INTRODUCTION The two main classes of routing protocols for mobile ad hoc networks (MANETs for analyzing protocol performance in mobile ad-hoc networks. In our framework, the adverse effects of signaling

Sadjadpour, Hamid

448

Group Theoretical Construction of Planar Noncommutative Systems  

E-print Network

In this thesis, we construct and classify planar noncommutative phase spaces by the coadjoint orbit method on the anisotropic and absolute time kinematical groups. We show that noncommutative symplectic structures can be generated in the framework of centrally extended anisotropic kinematical groups as well as in the framework of noncentrally abelian extended absolute time kinematical groups. However, noncommutative phase spaces realized with noncentral abelian extensions of the kinematical groups are algebraically more general than those constructed on their central extensions. As the coadjoint orbit construction has not been carried through some of these planar kinematical groups before, physical interpretations of new generators of those extended structures are given. Furthermore, in all the cases discussed here, the noncommutativity is measured by naturally introduced fields, each corresponding to a minimal coupling. This approach allows to not only construct directly a dynamical system when of course the symmetry group is known but also permits to eliminate the non minimal couplings in that system. Hence, we show also that the planar noncommutative phase spaces arise naturally by introducing minimal coupling. We introduce here new kinds of couplings. A coupling of position with a dual potential and a mixing model (that is minimal coupling of the momentum with a magnetic potential and of position with a dual potential). Finally we show that this group theoretical discussion can be recovered by a linear deformation of the Poisson bracket. The reason why linear deformation of Poisson bracket is required here is that the noncommutative parameters (which are fields) are constant (they are coming from central and noncentral abelian extensions of kinematical groups).

Ancille Ngendakumana

2014-01-21

449

Flexibility windows and phase transitions of ordered and disordered ANA framework zeolites  

NASA Astrophysics Data System (ADS)

The analcime-like feldspathoids are a group of microporous minerals with the ANA framework topology. Analcime proper has predominantly Na as its channel cation content, while leucite contains predominantly K, pollucite contains Cs and wairakite contains Ca. Under compression, all these minerals display structural displacive phase transitions to low-symmetry forms at relatively low pressures (0.5-3.2 GPa). We show, using geometric simulation, that these phase transitions are controlled by the "flexibility window" of the ANA framework, defined as the range of framework densities over which the tetrahedral units of the framework can in principle be made geometrically ideal. We discuss experimental compression data for these minerals and its relationship to the theoretical flexibility of the ANA framework, the influence of cation content, and framework ordering.

Wells, S. A.; Sartbaeva, A.; Gatta, G. D.

2011-06-01

450

Childhood Injuries in Maine: A Status Report.  

ERIC Educational Resources Information Center

Purposes of this report are to: (1) describe the extent of the childhood injury problem relative to diseases and other conditions affecting children in Maine who are 1 to 19 years of age; (2) give an overview of what is known about the incidence of childhood injuries in Maine; and (3) offer recommendations to improve the state's ability to control…

DiCara, Cheryl; And Others

451

40 CFR 81.413 - Maine.  

Code of Federal Regulations, 2013 CFR

...Environment 18 2013-07-01 2013-07-01 false Maine. 81.413 Section 81.413 Protection of Environment...Federal Areas Where Visibility Is an Important Value § 81.413 Maine. Area name Acreage Public Law establishing...

2013-07-01

452

40 CFR 81.413 - Maine.  

Code of Federal Regulations, 2014 CFR

...Environment 18 2014-07-01 2014-07-01 false Maine. 81.413 Section 81.413 Protection of Environment...Federal Areas Where Visibility Is an Important Value § 81.413 Maine. Area name Acreage Public Law establishing...

2014-07-01

453

40 CFR 81.413 - Maine.  

Code of Federal Regulations, 2010 CFR

...Environment 17 2010-07-01 2010-07-01 false Maine. 81.413 Section 81.413 Protection of Environment...Federal Areas Where Visibility Is an Important Value § 81.413 Maine. Area name Acreage Public Law establishing...

2010-07-01

454

40 CFR 81.413 - Maine.  

Code of Federal Regulations, 2012 CFR

...Environment 18 2012-07-01 2012-07-01 false Maine. 81.413 Section 81.413 Protection of Environment...Federal Areas Where Visibility Is an Important Value § 81.413 Maine. Area name Acreage Public Law establishing...

2012-07-01

455

Main Memory Caching of Web Documents  

Microsoft Academic Search

An increasing amount of information is currently becoming available through World Wide Web servers. Document requests to popular Web servers arrive every few tens of milliseconds at peak rate. To reduce the overhead imposed by frequent document requests, we propose the notion of caching a World Wide Web server's documents in its main memory (which we call Main Memory Web

Evangelos P. Markatos

1996-01-01

456

40 CFR 81.413 - Maine.  

Code of Federal Regulations, 2011 CFR

...Environment 17 2011-07-01 2011-07-01 false Maine. 81.413 Section 81.413 Protection of Environment...Federal Areas Where Visibility Is an Important Value § 81.413 Maine. Area name Acreage Public Law establishing...

2011-07-01

457

The Legal Rights of Maine Women.  

ERIC Educational Resources Information Center

This booklet is intended to help Maine women recognize and enforce their rights under Maine and federal law. It is not designed to be a substitute for lawyers' services, but to inform women of their legal rights so that they will know when to consult a lawyer or a governmental agency for assistance in enforcing these rights. Organized topically by…

Potter, Judy R.; Marshall, Gail

458

Penetration electric fields driving main phase Dst  

Microsoft Academic Search

On the basis of three selection criteria we have analyzed the main phase electrodynamics of 17 magnetic storms that occurred between 1999 and mid-2005: (1) the availability of solar wind measurements from the Advanced Composition Explorer (ACE) satellite, (2) a minimum Dst ? ?100 nT, and (3) no significant recovery episode between the beginning and maximum epoch of the main

William J. Burke; Louise C. Gentile; Cheryl Y. Huang

2007-01-01

459

UC SAN DIEGO ELEVATOR LOCATIONS MAIN CAMPUS  

E-print Network

UC SAN DIEGO ELEVATOR LOCATIONS MAIN CAMPUS BUILDING # OF ELEVATORS APPLIED PHYSICS AND MATHEMATICS BUILDING, UNIT 3B 2 ERC 5.1 1 FORUM THEATRE CONTROL ROOM 1 GALBRAITH HALL 3 GEISEL LIBRARY 6 GILMAN PARKING BUILDING # OF ELEVATORS HILLCREST MAIN HOSPITAL 16 HILLCREST AMBULATORY CARE CENTER 2 HILLCREST FACULTY

Tsien, Roger Y.

460

Water main assets: from deterioration to renewal  

Microsoft Academic Search

The deterioration of water mains is taking its toll on water utilities across the world. It is imperative that this deterioration be accurately quantified in order to implement effective renewal plans for water distribution systems. With hundreds and even thousands of buried pipes, it is often prohibitively expensive to directly inspect every water main in a distribution network. Identifying water

Yehuda Kleiner; Balvant Rajani

461

Maine KIDS COUNT 2000 Data Book.  

ERIC Educational Resources Information Center

This KIDS COUNT Report details statewide trends in the well-being of Maine's children. The statistical portrait is based on a variety of indicators in the areas of: (1) physical and mental health; (2) social and economic opportunity; (3) education and learning; and (4) child health care access. The report contains a special section on Maine

Maine Children's Alliance, Augusta.

462

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.

463

Geometric algebra: a computational framework  

E-print Network

Geometric algebra: a computational framework for geometrical applications (part I: algebra) Leo Dorst and Stephen Mann Abstract Geometric algebra is a consistent computational framework in which of geometric algebra are important for developers of CAD systems. This paper gives an introduction

Waterloo, University of

464

Geometric algebra: a computational framework  

E-print Network

Geometric algebra: a computational framework for geometrical applications (part II: applications) Leo Dorst and Stephen Mann Abstract Geometric algebra is a consistent computational framework in which. It shows how using well-chosen geometric algebra models, we can eliminate special cases in incidence

Dorst, Leo

465

Sublime Heterogeneities in Curriculum Frameworks  

ERIC Educational Resources Information Center

To what extent does the construction of any curriculum framework have to contain axiological assumptions? Educators have been made aware of tacit epistemological assumptions underlying existing curricular frameworks by the continual demands for their revision. Eisner (1979, 2002) suggested that curriculum policy should be centred around…

Haynes, Felicity

2006-01-01

466

EPA'S NEW EMISSIONS MODELING FRAMEWORK  

EPA Science Inventory

EPA's Office of Air Quality Planning and Standards is building a new Emissions Modeling Framework that will solve many of the long-standing difficulties of emissions modeling. The goals of the Framework are to (1) prevent bottlenecks and errors caused by emissions modeling activi...

467

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

468

DEVELOPING FRAMEWORKS FOR PROTOCOL IMPLEMENTATION  

E-print Network

design tech- niques, while the concrete systems to be build are protocol implementations. The protocol to develop frameworks for protocol implementation. Frameworks are software structures developed for a specific application domain, which can be reused in the implementation of various different concrete

Pires, Luís Ferreira

469

Learning and Technology Policy Framework  

ERIC Educational Resources Information Center

The Learning and Technology Policy framework provides direction and coordination of the use of technology in Alberta's learning system. This Framework will inform decisions by establishing a context for assessing trends, issues, best practices, and new initiatives; for ensuring the investment in technology is consistent with the learning system's…

Online Submission, 2004

2004-01-01

470

A behavioral paradigm for identifying persons at risk for bipolar depressive disorder: A conceptual framework and five validation studies  

Microsoft Academic Search

Attempted to study predisposition to bipolar manic-depressive disorder by developing a behavioral paradigm to identify persons at risk for various forms of the disorder. A theoretical discussion is given for defining bipolar disorder within the broader framework of common human diseases, and this framework is used to derive dimensions of bipolar disorder that define its distinctness from the normal phenotype.

Richard A Depue

1981-01-01

471

As the nation goes, so goes Maine?  

PubMed

Historically, Maine has been a state with generous safety net programs and a track record of innovative efforts in health system reform, developed under the leadership of Democratic administrations and with frequent support from moderate Republicans. But the 2010 elections in Maine dramatically changed the political balance of power, anointing both a governor and a legislature ideologically at odds with the state's recent political past. Maine has become a bastion of resistance to the Patient Protection and Affordable Care Act, with a reduced Medicaid program, defunded state access initiative, and no state exchange. In addition, the state has adopted a laissez-faire approach to insurance market dysfunction. Using Maine as a case study of the shifts in national political mood, this article describes in broad brushstrokes Maine's history of health reform efforts and recent shift in political direction, and discusses some of the factors that contributed to the change. PMID:24603087

Kilbreth, Elizabeth

2014-06-01

472

Maine Studiesumaine.edu/mainestudies An Interdisciplinary Minor that Focuses on the Study of Maine  

E-print Network

Maine Studiesumaine.edu/mainestudies An Interdisciplinary Minor that Focuses on the Study of Maine Interdisciplinary Core Courses: · MES 101- Introduction to Maine Studies (one section online, one section on site at UMaine), satisfies one or more general education requirements (gen ed). · MES 201 - The Maine Coast

Thomas, Andrew

473

33 CFR 334.30 - Gulf of Maine off Pemaquid Point, Maine; naval sonobuoy test area.  

Code of Federal Regulations, 2012 CFR

...Maine off Pemaquid Point, Maine; naval sonobuoy test area. 334.30 Section 334...Maine off Pemaquid Point, Maine; naval sonobuoy test area. (a) The area. The...Light. (b) The regulations. (1) Sonobuoy drops will be made only in the...

2012-07-01

474

33 CFR 334.30 - Gulf of Maine off Pemaquid Point, Maine; naval sonobuoy test area.  

Code of Federal Regulations, 2013 CFR

...Maine off Pemaquid Point, Maine; naval sonobuoy test area. 334.30 Section 334...Maine off Pemaquid Point, Maine; naval sonobuoy test area. (a) The area. The...Light. (b) The regulations. (1) Sonobuoy drops will be made only in the...

2013-07-01

475

33 CFR 334.30 - Gulf of Maine off Pemaquid Point, Maine; naval sonobuoy test area.  

Code of Federal Regulations, 2014 CFR

...Maine off Pemaquid Point, Maine; naval sonobuoy test area. 334.30 Section 334...Maine off Pemaquid Point, Maine; naval sonobuoy test area. (a) The area. The...Light. (b) The regulations. (1) Sonobuoy drops will be made only in the...

2014-07-01

476

33 CFR 334.30 - Gulf of Maine off Pemaquid Point, Maine; naval sonobuoy test area.  

Code of Federal Regulations, 2011 CFR

...Maine off Pemaquid Point, Maine; naval sonobuoy test area. 334.30 Section 334...Maine off Pemaquid Point, Maine; naval sonobuoy test area. (a) The area. The...Light. (b) The regulations. (1) Sonobuoy drops will be made only in the...

2011-07-01

477

33 CFR 334.30 - Gulf of Maine off Pemaquid Point, Maine; naval sonobuoy test area.  

Code of Federal Regulations, 2010 CFR

...Maine off Pemaquid Point, Maine; naval sonobuoy test area. 334.30 Section 334...Maine off Pemaquid Point, Maine; naval sonobuoy test area. (a) The area. The...Light. (b) The regulations. (1) Sonobuoy drops will be made only in the...

2010-07-01

478

Lightcurves and rotational periods of main belt asteroids. III.  

NASA Astrophysics Data System (ADS)

In the framework of the collaborative program between the Astronomy Institute of Catania University and the Torino Astronomical Observatory to collect new photometric lightcurves of main-belt asteroids, six new objects were observed. The B and V photoelectric observations were carried out at Serra la Nave stellar station of Catania Astrophysical Observatory during June and August 1992 and April, May and November 1993. The observed asteroids and their reliable determined synodic rotational periods are: 238 Hypatia (P=8.84h+/-0.01h), 371 Bohemia (P=12.48h+/-0.01h), 411 Xanthe (P=7.48h+/-0.01h), 419 Aurelia (P=16.63h+/-0.01h), 665 Sabine (P=3.932h+/-0.008h), 914 Palisana (P=15.62h+/-0.01h). No large modulation of the B-V color is in general evident for all the observed objects.

Riccioli, D.; Blanco, C.; di Martino, M.; de Sanctis, G.

1995-06-01

479

Nodal modulation of the lunar semidiurnal tide in the Bay of Fundy and Gulf of Maine  

SciTech Connect

Observations, numerical modeling, and theoretical calculations show how the 18.6-year modulation of the main lunar semidiurnal tide in the Bay of Fundy and Gulf of Maine is reduced from its astronomical value of 3.7 percent to 2.4 percent by the effects of friction and resonance. The agreement of the three approaches increases confidence in model predictions of widespread changes in the tidal regime resulting from development of tidal power. 12 references, 2 figures, 1 table.

Ku, L.F.; Greenberg, D.A.; Garrett, C.J.R.; Dobson, F.W.

1985-10-04

480

Structure and variability of the Western Maine Coastal Current  

USGS Publications Warehouse

Analyses of CTD and moored current meter data from 1998 and 2000 reveal a number of mechanisms influencing the flow along the western coast of Maine. On occasions, the Eastern Maine Coastal Current extends into the western Gulf of Maine where it takes the form of a deep (order 100 m deep) and broad (order 20 km wide) southwestward flow with geostrophic velocities exceeding 20 cm s -1. This is not a coastally trapped flow, however. In fields of geostrophic velocity, computed from shipboard-CTD data, the core of this current is roughly centered at the 100 m isobath and its onshore edge is no closer than 10 km from the coast. Geostrophic velocity fields also reveal a relatively shallow (order 10 m deep) baroclinic flow adjacent to the coast. This flow is also directed to the southwest and appears to be principally comprised of local river discharge. Analyses of moored current meter data reveal wind-driven modulations of the coastal flow that are consistent with expectations from simple theoretical models. However, a large fraction of the near-shore current variance does not appear to be directly related to wind forcing. Sea-surface temperature imagery, combined with analysis of the moored current meter data, suggests that eddies and meanders within the coastal flow may at times dominate the near-shore current variance. ?? 2005 Elsevier Ltd. All rights reserved.

Churchill, J.H.; Pettigrew, N.R.; Signell, R.P.

2005-01-01

481

The Case for Theoretical Pluralism.  

ERIC Educational Resources Information Center

Research and theory tend to lag behind practice in educational administration. Theory and research do not reflect schools' problems; the everyday activities of students, staff, and parents; nor the social milieu. Faulty research methodology is to blame, particularly reliance on single theories. By embracing new conceptual frameworks, such as…

Griffiths, Daniel

1997-01-01

482

Euclid's Number-Theoretical Work  

E-print Network

When people mention the mathematical achievements of Euclid, his geometrical achievements always spring to mind. But, his Number-Theoretical achievements (See Books 7, 8 and 9 in his magnum opus \\emph{Elements} [1]) are rarely spoken. The object of this paper is to affirm the number-theoretical role of Euclid and the historical significance of Euclid's algorithm. It is known that almost all elementary number-theoretical texts begin with Division algorithm. However, Euclid did not do like this. He began his number-theoretical work by introducing his algorithm. We were quite surprised when we began to read the \\emph{Elements} for the first time. Nevertheless, one can prove that Euclid's algorithm is essentially equivalent with the Bezout's equation and Division algorithm. Therefore, Euclid has preliminarily established Theory of Divisibility and the greatest common divisor. This is the foundation of Number Theory. After more than 2000 years, by creatively introducing the notion of congruence, Gauss published his \\emph{Disquisitiones Arithmeticae} in 1801 and developed Number Theory as a systematic science. Note also that Euclid's algorithm implies Euclid's first theorem (which is the heart of `the uniqueness part' of the fundamental theorem of arithmetic) and Euclid's second theorem (which states that there are infinitely many primes). Thus, in the nature of things, Euclid's algorithm is the most important number-theoretical work of Euclid. For this reason, we further summarize briefly the influence of Euclid's algorithm. Knuth said `we might call Euclid's method the granddaddy of all algorithms'. Based on our discussion and analysis, it leads to the conclusion Euclid's algorithm is the greatest number-theoretical achievement of the Euclidean age.

Shaohua Zhang

2009-02-14

483

ACACIA: An Agency Based Collaboration Framework for Heterogeneous Multi-Agent Systems  

Microsoft Academic Search

We introduce a collaboration framework called ACACIA for multi-agent systems (MAS). ACACIA is a high level framework that focuses on heterogeneous agents. Our main goal is to create a collaboration framework that precludes the re-engineering of existing software agents. We also apply a case-based coordination scheme in which a database of collaboration protocols can be consulted during the collaboration process.

Wilfred C. Jamison

1996-01-01

484

Quantum turbulence: Theoretical and numerical problems  

NASA Astrophysics Data System (ADS)

The term “quantum turbulence” (QT) unifies the wide class of phenomena where the chaotic set of one dimensional quantized vortex filaments (vortex tangles) appear in quantum fluids and greatly influence various physical features. Quantum turbulence displays itself differently depending on the physical situation, and ranges from quasi-classical turbulence in flowing fluids to a near equilibrium set of loops in phase transition. The statistical configurations of the vortex tangles are certainly different in, say, the cases of counterflowing helium and a rotating bulk, but in all the physical situations very similar theoretical and numerical problems arise. Furthermore, quite similar situations appear in other fields of physics, where a chaotic set of one dimensional topological defects, such as cosmic strings, or linear defects in solids, or lines of darkness in nonlinear light fields, appear in the system. There is an interpenetration of ideas and methods between these scientific topics which are far apart in other respects. The main purpose of this review is to bring together some of the most commonly discussed results on quantum turbulence, focusing on analytic and numerical studies. We set out a series of results on the general theory of quantum turbulence which aim to describe the properties of the chaotic vortex configuration, starting from vortex dynamics. In addition we insert a series of particular questions which are important both for the whole theory and for the various applications. We complete the article with a discussion of the hot topic, which is undoubtedly mainstream in this field, and which deals with the quasi-classical properties of quantum turbulence. We discuss this problem from the point of view of the theoretical results stated in the previous sections. We also included section, which is devoted to the experimental and numerical suggestions based on the discussed theoretical models.

Nemirovskii, Sergey K.

2013-03-01

485

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

486

Theoretical  

NASA Astrophysics Data System (ADS)

Modeling and simulation of TiO2 nanorod based DSSC are done to explore the effect of nanorod diameter on the short-circuit current density. The results show that the porosity decreases with increasing diameter of nanorod for a fixed value of inter-rod separation. The short-circuit current density can be improved by optimizing the nanorod diameter. From this study it could be observed that the nanorods of diameter from 65 nm to 90 nm with a porosity range from 0.43 to 0.66 would result in better performing DSSC. The peak value of current density of 23.96 mA/cm2 is obtained for the working electrode with a nanorod diameter of 81 nm of length 12 ?m for N719 dye.

Tripathi, Brijesh; Yadav, Pankaj; Kumar, Manoj

487

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.

488

Dogmatism and Theoretical Pluralism in Modern Cosmology  

E-print Network

This work discusses the presence of a dogmatic tendency within modern cosmology, and some ideas capable of neutralizing its negative influence. It is verified that warnings about the dangers of dogmatic thinking in cosmology can be found as early as the 1930's, and we discuss the modern appearance of "scientific dogmatism". The solution proposed to counteract such an influence, which is capable of neutralizing this dogmatic tendency, has its origins in the philosophical thinking of the Austrian physicist Ludwig Boltzmann (1844-1906). In particular we use his two main epistemological theses, scientific theories as representations of nature and theoretical pluralism, to show that once they are embodied in the research practice of modern cosmology, there is no longer any reason for dogmatic behaviours.

Marcelo B. Ribeiro; Antonio A. P. Videira

1998-06-08

489

Dogmatism and Theoretical Pluralism in Modern Cosmology  

E-print Network

This work discusses the presence of a dogmatic tendency within modern cosmology, and some ideas capable of neutralizing its negative influence. It is verified that warnings about the dangers of dogmatic thinking in cosmology can be found as early as the 1930's, and we discuss the modern appearance of "scientific dogmatism". The solution proposed to counteract such an influence, which is capable of neutralizing this dogmatic tendency, has its origins in the philosophical thinking of the Austrian physicist Ludwig Boltzmann (1844-1906). In particular we use his two main epistemological theses, scientific theories as representations of nature and theoretical pluralism, to show that once they are embodied in the research practice of modern cosmology, there is no longer any reason for dogmatic behaviours.

Ribeiro, M B; Ribeiro, Marcelo B.; Videira, Antonio A. P.

1998-01-01

490

Genetic Status of Atlantic Salmon in Maine  

NSDL National Science Digital Library

This interim report from the National Research Council's (NRC) Committee on Atlantic Salmon in Maine is a prepublication of the March 2002 report provided by National Academy Press. The once abundant populations of Atlantic Salmon in Maine have declined in recent years, now listed as endangered. The NRC Committee believes that "understanding the genetic makeup of Maine's salmon is important for recovery efforts." This 48-page report includes information on the salmon's biology, evolution, genetics, its current state, and the committee's conclusions. It can be viewed online or downloaded for printing.

National Research Council. Committee on Atlantic Salmon in Maine.

491

How Does Sexual Minority Stigma “Get Under the Skin”? A Psychological Mediation Framework  

PubMed Central

Sexual minorities are at increased risk for multiple mental health burdens compared to heterosexuals. The field has identified two distinct determinants of this risk, including group-specific minority stressors and general psychological processes that are common across sexual orientations. The goal of the present paper is to develop a theoretical framework that integrates the important insights from these literatures. The framework postulates that (a) sexual minorities confront increased stress exposure resulting from stigma; (b) this stigma-related stress creates elevations in general emotion dysregulation, social/interpersonal problems, and cognitive processes conferring risk for psychopathology; and (c) these processes in turn mediate the relationship between stigma-related stress and psychopathology. It is argued that this framework can, theoretically, illuminate how stigma adversely affects mental health and, practically, inform clinical interventions. Evidence for the predictive validity of this framework is reviewed, with particular attention paid to illustrative examples from research on depression, anxiety, and alcohol use disorders. PMID:19702379

Hatzenbuehler, Mark L.

2009-01-01

492

Main Features of the Caspian Sea Hydrology  

Microsoft Academic Search

\\u000a The Caspian Sea constantly attracts considerable attention thanks to its natural uniqueness, resource abundance, great historical\\u000a value and vital importance to human societies of the vast Caspian region. In these circumstances, improving theoretical and\\u000a applied knowledge of the sea is indispensable for addressing many complex issues. Specifically, there has been increasing\\u000a environmental concern over expanding extraction of hydrocarbons off and

Aleksey N. Kosarev; Valentin S. Tuzhilkin; Andrey G. Kostianoy

493

A Framework for the Evaluation of CASE Tool Learnability in Educational Environments  

ERIC Educational Resources Information Center

The aim of the research is to derive a framework for the evaluation of Computer Aided Software Engineering (CASE) tool learnability in educational environments. Drawing from the literature of Human Computer Interaction and educational research, a framework for evaluating CASE tool learnability in educational environments is derived. The two main

Senapathi, Mali

2005-01-01

494

Developing the evaluation framework of technology foresight program: lesson learned from European countries  

Microsoft Academic Search

Foresight activities are valued in many countries since 1990s due to their long term strategic planning. These governments consequently allocate most resources in these foresight activities. As a result, the paper mainly develops the evaluation framework of technology foresight program, by integrating the concepts of evaluation and logic framework with the experience of foresight evaluation from developed countries, for instance

S. S. Li; M. H. Kang; L. C. Lee

2009-01-01

495

Space Shuttle Main Engine Test Firing  

NASA Technical Reports Server (NTRS)

A cloud of extremely hot steam boils out of the flame deflector at the A-1 test stand during a test firing of a Space Shuttle Main Engine (SSME) at the John C. Stennis Space Center, Hancock County, Mississippi.

1988-01-01

496

Maine Geological Survey: Online Educational Materials  

NSDL National Science Digital Library

The Maine Geological Survey (MGS) has crafted a fine set of materials for those interested in learning more about the state's natural history via virtual tours, lesson plans, and maps. First up is the Virtual Tour of Maine Geology, which includes photographs of bedrock geology, geologic hazards, mineral collecting, and surficial geology. The Lesson Plans area contains 51 lessons, including "Igneous Rock Identification" and "Composition of Topsoil." A number of MGS maps are available online in the Maps and Publications area. The site includes a Bibliography of Maine Geology, which contains over 12,000 references. Additionally, the site contains a link to the MGS publications page, which has official state of Maine wall maps available for purchase.

2013-05-30

497

Maine Geological Survey: Online Educational Materials  

NSDL National Science Digital Library

The Maine Geological Survey (MGS) has crafted a fine set of materials for those interested in learning more about the state's natural history via virtual tours, lesson plans, and maps. First up is the Virtual Tour of Maine Geology, which includes photographs of bedrock geology, geologic hazards, mineral collecting, and surficial geology. The Lesson Plans area contains 51 lessons, including "Igneous Rock Identification" and "Composition of Topsoil." A number of MGS maps are available online in the Maps and Publications area. The site includes a Bibliography of Maine Geology, which contains over 12,000 references. Additionally, the site contains a link to the MGS publications page, which has official state of Maine wall maps available for purchase.

2009-12-08

498

Main ring lattice and beam dynamics  

SciTech Connect

The main-ring lattice considered in this note is based on previous studies made for high-energy rings of the TRIUMF Kaon Factory as well as for the main ring and second-generation storage ring proposed for an advanced hadron facility at Los Alamos. The reason for further study of the design concepts is mainly to increase the dynamic aperture for coupled motion in the presence of the sextupoles used for chromaticity adjustment and magnet imperfection compensation. At the same time, it was interesting to include the features required for slow extraction and direct H/sup /minus// injection and obtain a complete layout of the ring as close as possible to a realistic structure for estimating the stability limit. The basic ideas retained for the design of the main ring lattice are briefly recalled here. 10 refs., 2 figs., 1 tab.

Guignard, G.

1989-01-01

499

Main Ideas Are Hamburgers (in the Classroom).  

ERIC Educational Resources Information Center

Lists 10 activities used to develop and reinforce the concepts of main idea and generalizing, after describing how a particular teacher connected a favorite meal with the understanding of these concepts. (MG)

Arthur, Beth M.

1991-01-01

500

Alfons Hoekstra (UvA) A Multiscale Modelling & Computing Framework and  

E-print Network

Colloquium Alfons Hoekstra (UvA) A Multiscale Modelling & Computing Framework and selected - and Distributed Computing, with applications mainly in the biomedical domain. See http://uva.computationalscience.nl and http://staff.science.uva.nl/~alfons/ #12;

Al Hanbali, Ahmad