Showing papers on "Context (language use) published in 2000"

Systematic Reviews in Health Care : Meta-Analysis in Context

Abstract: The second edition of this best-selling book has been thoroughly revised and expanded to reflect the significant changes and advances made in systematic reviewing. New features include discussion on the rationale, meta-analyses of prognostic and diagnostic studies and software, and the use of systematic reviews in practice.

Dilemmas in qualitative health research

Abstract: As the use of qualitative methods in health research proliferates, it becomes increasingly necessary to consider how the value of a piece of qualitative research should be assessed. This article discusses the problem posed by the novelty and diversity of qualitative approaches within health psychology and considers the question of what criteria are appropriate for assessing the validity of a qualitative analysis. In keeping with the ethos of much qualitative research, some open-ended, flexible principles are suggested as a guide to the quality of a qualitative study: sensitivity to context; commitment and rigour; transparency and coherence; impact and importance. Examples are given of the very different ways in which various forms of qualitative research can meet these criteria.

The finite element method in electromagnetics

Abstract: This Key Note presents a summary of the development of the Finite Element Method in the field of Electromagnet ic Engineering, together with a description of several contributions of the authors to the Finite Element Method and its application to the solution of electromagnetic problems. First, a self-adaptive mesh scheme is presented in the context of the quasi-static and full-wave analysis of general anisotropic multiconductor arbitrary shaped waveguiding structures. A comparison between two a posteriori error estimates is done. The first one is based on the complete residual of the differential equations defining the problem. The second one is based on a recovery or smoothing technique of the electromagnetic field. Next, an implementation of the first family of Nedelec's curl-conforming elements done by the authors is outlined. Its features are highlighted and compared with other curl-conforming elements. A presentation of an iterative procedure using a numerically exact radiation condition for the analysis of open (scattering and radiation) problems follows. Other contributions of the authors, like the use of wavelet like basis functions and an implementation of a Time Domain Finite Element Method in the context of two-dimensional scattering problems are only mentioned due to the lack of space.

A Survey of Context-Aware Mobile Computing Research

Abstract: Context-aware computing is a mobile computing paradigm in which applications can discover and take advantage of contextual information (such as user location, time of day, nearby people and devices, and user activity) Since it was proposed about a decade ago, many researchers have studied this topic and built several context-aware applications to demonstrate the usefulness of this new technology Context-aware applications (or the system infrastructure to support them), however, have never been widely available to everyday users In this survey of research on context-aware systems and applications, we looked in depth at the types of context used and models of context information, at systems that support collecting and disseminating context, and at applications that adapt to the changing context Through this survey, it is clear that context-aware research is an old but rich area for research The difficulties and possible solutions we outline serve as guidance for researchers hoping to make context-aware computing a reality

Situated literacies : reading and writing in context

Abstract: Situated Literacies is a rich and varied collection of key writings from leading international scholars in the field of literacy. Each contribution, written in a clear, accessible style, makes the link between literacies in specific contexts and broader social practices. Detailed ethnographic studies of a wide variety of specific situations, all involving real texts and lived practices, are balanced with general claims about the nature of literacy. Contributors address a coherent set of issues: * the visual and material aspects of literacy * concepts of time and space in relation to literacy * the functions of literacies in shaping and sustaining identities in communities of practice * the relationship between texts and the practices associated with their use the role of discourse analysis on literacy studies These studies, along with a foreword by Denny Taylor, make a timely and important contribution to literacy theory and suggest directions for the further development of the field. Situated Literacies is essential reading for anyone involved in literary education.

Attitudes and the Attitude-Behavior Relation: Reasoned and Automatic Processes

Abstract: The chapter re-examines, in light of recent developments, the reasoned action perspective inherent in the expectancy-value model of attitude and in the theory of planned behavior. According to this perspective, people's attitudes follow spontaneously and consistently from beliefs accessible in memory and then guide corresponding behavior. The number and types of beliefs that are accessible vary with motivation and ability to process attitude-relevant information and with the context. Based on these considerations, it is shown that the reasoned action perspective is compatible with evidence for automatic processes in the activation of attitudes and behavior, and with the finding that attitudes can vary with the context in which they are expressed. Implications for the attitude-behavior relation and for the role of habit in human behavior are discussed.

Scale-Invariance and Turbulence Models for Large-Eddy Simulation

Abstract: ▪ Abstract Relationships between small and large scales of motion in turbulent flows are of much interest in large-eddy simulation of turbulence, in which small scales are not explicitly resolved and must be modeled. This paper reviews models that are based on scale-invariance properties of high-Reynolds-number turbulence in the inertial range. The review starts with the Smagorinsky model, but the focus is on dynamic and similarity subgrid models and on evaluating how well these models reproduce the true impact of the small scales on large-scale physics and how they perform in numerical simulations. Various criteria to evaluate the model performance are discussed, including the so-called a posteriori and a priori studies based on direct numerical simulation and experimental data. Issues are addressed mainly in the context of canonical, incompressible flows, but extensions to scalar-transport, compressible, and reacting flows are also mentioned. Other recent modeling approaches are briefly introduced.

A Multidimensional Conceptualization of Racism‐Related Stress: Implications for the Well‐Being of People of Color

Abstract: A conceptualization of racism-related stress and its impact on well-being is offered that integrates existing theory and research on racism, multicultural mental health, and the stress process The conceptualization is relevant to diverse racial/ethnic groups, considers the larger social and historical context, and incorporates attention to culture-based variables that may mediate the relationship between racism and well-being Implications for intervention are discussed

Emotion, plasticity, context, and regulation: perspectives from affective neuroscience.

Abstract: The authors present an overview of the neural bases of emotion. They underscore the role of the prefrontal cortex (PFC) and amygdala in 2 broad approach- and withdrawal-related emotion systems. Components and measures of affective style are identified. Emphasis is given to affective chronometry and a role for the PFC in this process is proposed. Plasticity in the central circuitry of emotion is considered, and implications of data showing experience-induced changes in the hippocampus for understanding psychopathology and stress-related symptoms are discussed. Two key forms of affective plasticity are described--context and regulation. A role for the hippocampus in context-dependent normal and dysfunctional emotional responding is proposed. Finally, implications of these data for understanding the impact on neural circuitry of interventions to promote positive affect and on mechanisms that govern health and disease are considered.

Mode-locking of lasers

Abstract: The evolution of the theory of mode-locking over the last three and a half decades is reviewed and some of the salient experiments are discussed in the context of the theory. The paper ends with two-cycle pulses of a mode-locked Ti:sapphire laser.

College Binge Drinking in the 1990s: A Continuing Problem

Abstract: In 1999, the Harvard School of Public Health College Alcohol Study resurveyed colleges that participated in the 1993 and 1997 surveys. Responses to mail questionnaires from more than 14 000 students at 119 nationally representative 4-year colleges in 39 states were compared with responses received in 1997 and 1993. Two of 5 students (44%) were binge drinkers in 1999, the same rate as in 1993. However, both abstention and frequent binge-drinking rates increased significantly. In 1999, 19% were abstainers, and 23% were frequent binge drinkers. As before, binge drinkers, and particularly frequent binge drinkers, were more likely than other students to experience alcohol-related problems. At colleges with high binge-drinking rates, students who did not binge drink continued to be at higher risk of encountering the secondhand effects of others’heavy drinking. The continuing high level of binge drinking is discussed in the context of the heightened attention and increased actions at colleges. Although it may take more time for interventions to take effect, the actions college health providers have undertaken thus far may not be a sufficient response.

Doing Discourse Analysis: Methods for Studying Action in Talk and Text

Abstract: PART ONE: THEORETICAL BACKGROUND Language, Discourse and Discourse Analysis Varieties of Discourse Analysis Example of Discourse Analysis PART TWO: METHOD Discourse and Data Data Collection Preparation for Analysis PART THREE: ANALYSIS Analysis I Strategies of Interpretation Analysis II Patterns and Context Identities in Talk Research Examples PART FOUR: EVALUATING AND REPORTING Warranting in Discourse Analysis Writing the Report

Psychological resources, positive illusions, and health.

Abstract: Psychological beliefs such as optimism, personal control, and a sense of meaning are known to be protective of mental health. Are they protective of physical health as well? The authors present a program of research that has tested the implications of cognitive adaptation theory and research on positive illusions for the relation of positive beliefs to disease progression among men infected with HIV. The investigations have revealed that even unrealistically optimistic beliefs about the future may be health protective. The ability to find meaning in the experience is also associated with a less rapid course of illness. Taken together, the research suggests that psychological beliefs such as meaning, control, and optimism act as resources, which may not only preserve mental health in the context of traumatic or life-threatening events but be protective of physical health as well.

Providing architectural support for building context-aware applications

Abstract: Traditional interactive applications are limited to using only the input that users explicitly provide. As users move away from traditional desktop computing environments and move towards mobile and ubiquitous computing environments, there is a greater need for applications to leverage from implicit information, or context. These types of environments are rich in context, with users and devices moving around and computational services becoming available or disappearing over time. This information is usually not available to applications but can be useful in adapting the way in which it performs its services and in changing the available services. Applications that use context are known as context-aware applications. This research in context-aware computing has focused on the development of a software architecture to support the building of context-aware applications. While developers have been able to build context-aware applications, they have been limited to using a small variety of sensors that provide only simple context such as identity and location. This dissertation presents a set of requirements and component abstractions for a conceptual supporting framework. The framework along with an identified design process makes it easier to acquire and deliver context to applications, and in turn, build more complex context-aware applications. In addition, an implementation of the framework called the Context Toolkit is discussed, along with a number of context-aware applications that have been built with it. The applications illustrate how the toolkit is used in practice and allows an exploration of the design space of context-aware computing. This dissertation also shows how the Context Toolkit has been used as a research testbed, supporting the investigation of difficult problems in context-aware computing such as the building of high-level programming abstractions, dealing with ambiguous or inaccurate context data and controlling access to personal context.

Implementing Change: Patterns, Principles, and Potholes

Abstract: Part I The Context for Implementing Change Chapter 1 What Key Patterns, Principles, and Lessons Have We Learned About Implementing Change? Chapter 2 What Actions and Events Are Imperative in Facilitating Implementation? Part II The People Part of Change: Three Diagnostic Dimensions: Concerns, Using, and Fidelity Chapter 3 How Can We Clarify the Change? Chapter 4 How Can the Different Feelings and Perceptions About Change Be Understood and Addressed? Chapter 5 What Are Characteristic Behavioral Profiles of Implementers? Part III Leading Change across the Organization Chapter 6 How Do Leaders Make a Difference in Implementation Success? Chapter 7 How Does a Culture of Continuous Learning Support Implementation? Chapter 8 What Can Be Done to Understand a Part of the Change Process That Is Not Controlled by the Leaders or the Followers? Part IV Different Perspectives for Understanding the Big Picture of Change: Systems, Diffusion, and Organization Development Chapter 9 How Can Systems Thinking Enhance the Success of Change Efforts? Chapter 10 How Do Communication Activities and Change Agents Affect Implementation? Chapter 11 In What Ways Can Team Member Skills and Process Consultants Affect Implementation? Part V Combining Views: Perspectives, Constructs, Tools, Applications, and Implications Chapter 12 How Can Change Constructs Be Combined to Understand, Assess, and Lead Efforts to Implement Change? Appendix A Stages of Concern Questionnaire Appendix B Stages of Concern Questionnaire Scoring Device Appendix C Levels of Use of the Innovation Appendix D Six Dimensions of Change Facilitator Style Appendix E Change Facilitator Style Questionnaire Appendix F Change Facilitator Style Questionnaire Scoring Device Appendix G Example Interventions for Each Stage of Concern References Index

EasyLiving: Technologies for Intelligent Environments

Abstract: The EasyLiving project is concerned with development of an architecture and technologies for intelligent environments which allow the dynamic aggregation of diverse I/O devices into a single coherent user experience. Components of such a system include middleware (to facilitate distributed computing), world modelling (to provide location-based context), perception (to collect information about world state), and service description (to support decomposition of device control, internal logic, and user interface). This paper describes the current research in each of these areas, highlighting some common requirements for any intelligent environment.

Stakeholder analysis: a review.

Abstract: The growing popularity of stakeholder analysis reflects an increasing recognition of how the characteristics of stakeholders--individuals, groups and organizations--influence decision-making processes. This paper reviews the origins and uses of stakeholder analysis, as described in the policy, health care management and development literature. Its roots are in the political and policy sciences, and in management theory where it has evolved into a systematic tool with clearly defined steps and applications for scanning the current and future organizational environment. Stakeholder analysis can be used to generate knowledge about the relevant actors so as to understand their behaviour, intentions, interrelations, agendas, interests, and the influence or resources they have brought--or could bring--to bear on decision-making processes. This information can then be used to develop strategies for managing these stakeholders, to facilitate the implementation of specific decisions or organizational objectives, or to understand the policy context and assess the feasibility of future policy directions. Policy development is a complex process which frequently takes place in an unstable and rapidly changing context, subject to unpredictable internal and external factors. As a cross-sectional view of an evolving picture, the utility of stakeholder analysis for predicting and managing the future is time-limited and it should be complemented by other policy analysis approaches.

Quality, Nature, and Embeddedness: Some Theoretical Considerations in the Context of the Food Sector

Abstract: In this paper we analyze a turn to “quality” in both food production and consumption. We argue that quality in the food sector, as it is being asserted at the present time, is closely linked to nature and the local embeddedness of supply chains. We thus outline the broad contours of this shift and discuss the most appropriate theoretical approaches. We consider political economy, actor-network theory, and conventions theory and argue that, whereas political economy has proved useful in the analysis of globalization, it may prove less so in the examination of quality. We concentrate, therefore, upon actor-network theory and conventions theory and show that the former allows nature to be brought to the center of analytical attention but provides few tools for the analysis of quality, especially in the context of the food sector. Conventions theory, on the other hand, links together a range of aspects found in food supply chains and allows us to consider the establishment of quality as a system of ne...

One road to turnover: an examination of work exhaustion in technology professionals

Abstract: The concept of work exhaustion (or job burnout) from the management and psychology research literature is examined in the context of technology professionals. Data were collected from 270 IT professionals and managers in various industries across the United States. Through structural equation modeling, work exhaustion was shown to partially mediate the effects of workplace factors on turnover intention. In addition, the results of the study revealed that: (1) technology professionals experiencing higher levels of exhaustion reported higher intentions to leave the job and, (2) of the variables expected to influence exhaus

Automatic recognition of multi-word terms:. the C-value/NC-value method

Abstract: Technical terms (henceforth called terms ), are important elements for digital libraries. In this paper we present a domain-independent method for the automatic extraction of multi-word terms, from machine-readable special language corpora. The method, (C-value/NC-value ), combines linguistic and statistical information. The first part, C-value, enhances the common statistical measure of frequency of occurrence for term extraction, making it sensitive to a particular type of multi-word terms, the nested terms. The second part, NC-value, gives: 1) a method for the extraction of term context words (words that tend to appear with terms); 2) the incorporation of information from term context words to the extraction of terms.

Research Report: The Evolving Relationship Between General and Specific Computer Self-Efficacy--An Empirical Assessment

Abstract: The concept of computer self-efficacy (CSE) recently has been proposed as important to the study of individual behavior toward information technology. This paper extends current understanding about the concept of self-efficacy in the context of computer software. We describe how two broad types of computer self-efficacy beliefs, general self-efficacy and task-specific self-efficacy, are constructed across different computing tasks by suggesting that initial general CSE beliefs will strongly predict subsequentspecific CSE beliefs. The theorized causal relationships illustrate the malleability and development of CSE beliefs over time, within a training environment where individuals are progressively provided with greater opportunity for hands-on experience and practice with different software. Consistent with the findings of prior research, judgments of self-efficacy then serve as key antecedents of the perceived cognitive effort (ease of use) associated with technology usage. Further, we theorize that self-efficacy judgments in the task domain of computing are strongly influenced by the extent to which individuals believe that they are personally innovative with respect to information technology. Panel data were collected using a longitudinal research design within a training context where 186 subjects were taught two software packages in a sequential manner over a 14-week period. The emergent patterns of the hypothesized relationships are examined using structural equation modeling techniques. Results largely support the relationships posited.

Dissociable Neural Responses in Human Reward Systems

Abstract: Reward is one of the most important influences shaping behavior. Single-unit recording and lesion studies in experimental animals have implicated a number of regions in response to reinforcing stimuli, in particular regions of the extended limbic system and the ventral striatum. In this experiment, functional neuroimaging was used to assess neural response within human reward systems under different psychological contexts. Nine healthy volunteers were scanned using functional magnetic resonance imaging during the performance of a gambling task with financial rewards and penalties. We demonstrated neural sensitivity of midbrain and ventral striatal regions to financial rewards and hippocampal sensitivity to financial penalties. Furthermore, we show that neural responses in globus pallidus, thalamus, and subgenual cingulate were specific to high reward levels occurring in the context of increasing reward. Responses to both reward level in the context of increasing reward and penalty level in the context of increasing penalty were seen in caudate, insula, and ventral prefrontal cortex. These results demonstrate dissociable neural responses to rewards and penalties that are dependent on the psychological context in which they are experienced.

The Stanford Achievement Test, 9th Edition: National Norming and Performance Standards for Deaf and Hard-of-Hearing Students

Abstract: This article presents a rich context of information for interpreting Stanford Achievement Test scores and for describing the achievement of deaf and hard-of-hearing students The publisher's national norming of the Stanford Achievement Test provides a context of actual performance of hearing students The publisher's Performance Standards provide a context of expectations for hearing students as determined by a panel of experts The Gallaudet Research Institute's norming of the test on a national sample of deaf and hard-of-hearing students provides a context of test performance by this special population A smaller subsample of the deaf and hard-of-hearing students who take the same test levels as hearing students provides an additional reference group with respect to the Performance Standards Information from these sources is brought together into two graphical contexts to address these questions: Can the normative data from the publisher's national standardization of the test with hearing students, and the normative data from the GRI's national norming of the test with deaf and hard-of-hearing students provide a useful context for the interpretation of individual test scores? Can they provide a useful way to examine achievement of groups of students? Can the new Performance Standards defined by the test publisher offer a useful context for test score interpretation for high-achieving deaf and hard-of-hearing students?

Social entrepreneurship – a new look at the people and the potential

Abstract: Considers the crucial role of private sector social entrepreneurship in the context of a state welfare system stretched beyond its means. Defines social entrepreneurship, recounts a number of key points from relevant research projects, reflects upon current developments and initiatives, describes a number of cases and uses these to draw a set of tentative conclusions about social entrepreneurs and social entrepreneurship in the context of the current government’s aim of fostering rapid growth in the sector. Concludes that while such growth is highly desirable, a number of hurdles have to be overcome.

Metal nanoparticles and their assemblies

Abstract: Metal nanoparticles of varying sizes can be prepared by physical as well as chemical methods. They exhibit many fascinating properties, the size-dependent metal to nonmetal transition being an important one. Metal nanoparticles capped by thiols can be organized into ordered one-, two- and three-dimensional structures and these structures have potential applications in nanodevices. In this context, organization of arrays of metal nanoparticles with a fixed number of atoms assumes significance.

Implicit human computer interaction through context

Abstract: In this paper the term “implicit human-computer interaction” is defined. It is discussed how the availability of processing power and advanced sensing technology can enable a shift in HCI from explicit interaction, such as direct manipulation GUIs, towards a more implicit interaction based on situational context. In the paper, an algorithm is given based on a number of questions to identify applications that can facilitate implicit interaction. An XML-based language to describe implicit HCI is proposed. The language uses contextual variables that can be grouped using different types of semantics as well as actions that are called by triggers. The term of perception is discussed and four basic approaches are identified that are useful when building context-aware applications. Two examples, a wearable context awareness component and a sensor-board, show how sensor-based perception can be implemented. It is also discussed how situational context can be exploited to improve input and output of mobile devices.

Focused Crawling Using Context Graphs

Abstract: Maintaining currency of search engine indices by exhaustive crawling is rapidly becoming impossible due to the increasing size and dynamic content of the web. Focused crawlers aim to search only the subset of the web related to a specific category, and offer a potential solution to the currency problem. The major problem in focused crawling is performing appropriate credit assignment to different documents along a crawl path, such that short-term gains are not pursued at the expense of less-obvious crawl paths that ultimately yield larger sets of valuable pages. To address this problem we present a focused crawling algorithm that builds a model for the context within which topically relevant pages occur on the web. This context model can capture typical link hierarchies within which valuable pages occur, as well as model content on documents that frequently cooccur with relevant pages. Our algorithm further leverages the existing capability of large search engines to provide partial reverse crawling capabilities. Our algorithm shows significant performance improvements in crawling efficiency over standard focused crawling.