1,743 research outputs found

    Grensoverschrijdend inlenen van arbeid in de agrarische sector:een branche-impressie

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    Product- en diensteninnovatie in internationale arbeidsbemiddeling worden bemoeilijkt door onduidelijkheid en onzekerheid. In dit working paper van het Expertisecentrum Grensoverschrijdend Inlenen van Arbeid, wordt beschreven wat de huidige stand van zaken is in de agrarische sector. Ook worden relevante cijfers gepresenteerd over de agrarische arbeidsmarkt en komen ontwikkelingen in de bedrijfstak op het gebied van grensoverschrijdend inlenen van arbeid aan de orde. Het paper eindigt met een vooruitblik op de verdere ontwikkeling van (tijdelijke arbeids)migratie in de agrarische sector

    Minimum power design of RF front ends

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    This thesis describes an investigation into the design of RF front ends with minimum power dissipation. The central question is: "What are the fundamental limits for the power dissipation of telecommunication front ends, and what design procedures can be followed that approach these limits and, at the same time, result in practical circuits?" After a discussion of the state of the art in this area, the elementary operations of a front end are identified. For each of these elementary operations, the fundamental limits for the power dissipation are discussed, divided into technology imposed limits and physics imposed limits. A traditional DECT front end design is used to demonstrate the large difference between the fundamental limits and the power dissipation of existing circuits. To improve this situation, first the optimum distribution of specifications across individual subcircuits needs to be determined, such that the requirements for a specific system can be fulfilled. This is achieved through the introduction of formal transforms of the specifications of subcircuits, which correspond with transforms of the subcircuit itself. Using these transforms, the optimum distribution of gain, noise, linearity and power dissipation can be determined. As it turns out, this optimum distribution can even be represented by a simple, analytical expression. This expression predicts that the power dissipation of the DECT front end can be reduced by a factor of 2.7 through an optimum distribution of the specifications. Using these optimum specifications of the subcircuits, the boundaries for further power dissipation reduction can be determined. This is investigated at the system, circuit and technology level. These insights are used in the design of a 2.5GHz wireless local area network, implemented in an optimized technology ("Silicon on Anything"). The power dissipation of the complete receiver is 3.5mW, more than an order of magnitude below other wireless LAN receivers in recent publications. Finally, the combination of this minimum power design method with a platform based development strategy is discussed

    No strings attached:the complexity of omissions

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    Cultural Competence in School Social Work: A Personal and Professional Learning Curve

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    As the nation grows more diverse and the numbers of American youth with mental illness climb, the importance of culturally responsive school social work practice is critical. Research suggests cultural competence is a fluid concept but one that improves service and client outcomes. Studies link cultural competence to licensure levels and practice experience, as well as primary social work competencies. Studies also indicate practitioners consider professional development and a supportive school environment to aid in cultural competency efforts, while societal influences and personal lack of knowledge and self-awareness can impede the process. This study obtained primary data from a purposive sample (n = 7) of licensed school social workers in an urban school district. A semi-structured interview afforded quantitative and qualitative data regarding demographics and perceptions on knowledge, skills, influences, and evaluative measures deemed relevant to cultural competence. The findings echo previous research that suggests cultural competence involves adopting key social work principles and therapeutic skills in the aim to meet individual client needs, rather than those assumed to belong to an overt cultural group. Supports were seen as generally stemming from more immediate factors, while barriers were seen as stemming from larger, more removed influences; this also supports previous research. This study suggests social workers’ abilities to model cultural responsiveness and a willingness to assess their own competencies in diverse ways are important practice components. It also highlights the need for more balanced, behaviorally based cultural competency measures. Future research to explore clients’ perspectives of practitioners’ cultural competence and relevant case studies is recommended. While this study’s qualitative nature allowed for personal insight and experiences, it remains highly exploratory

    Cultural Competence in School Social Work: A Personal and Professional Learning Curve

    Get PDF
    As the nation grows more diverse and the numbers of American youth with mental illness climb, the importance of culturally responsive school social work practice is critical. Research suggests cultural competence is a fluid concept but one that improves service and client outcomes. Studies link cultural competence to licensure levels and practice experience, as well as primary social work competencies. Studies also indicate practitioners consider professional development and a supportive school environment to aid in cultural competency efforts, while societal influences and personal lack of knowledge and self-awareness can impede the process. This study obtained primary data from a purposive sample (n = 7) of licensed school social workers in an urban school district. A semi-structured interview afforded quantitative and qualitative data regarding demographics and perceptions on knowledge, skills, influences, and evaluative measures deemed relevant to cultural competence. The findings echo previous research that suggests cultural competence involves adopting key social work principles and therapeutic skills in the aim to meet individual client needs, rather than those assumed to belong to an overt cultural group. Supports were seen as generally stemming from more immediate factors, while barriers were seen as stemming from larger, more removed influences; this also supports previous research. This study suggests social workers’ abilities to model cultural responsiveness and a willingness to assess their own competencies in diverse ways are important practice components. It also highlights the need for more balanced, behaviorally based cultural competency measures. Future research to explore clients’ perspectives of practitioners’ cultural competence and relevant case studies is recommended. While this study’s qualitative nature allowed for personal insight and experiences, it remains highly exploratory

    Optimizing RF front ends for low power

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    This paper discusses optimizations for the power dissipation of RF front ends in portable wireless devices. A breakthrough in power dissipation can be achieved by simultaneously optimizing the antenna interface, circuits, and IC technology of such devices. A model that predicts the minimum power dissipation of a front end for both short-range and long-range connections will be introduced. Using these models, the impact of the antenna interface on the power dissipation will be assessed. Using two antennas with equal gain combining, a typical power dissipation reduction of 2.5 to 30 times can be achieved. Using high-impedance circuits for short-range systems in combination with silicon-on-anything technology, a further reduction of power dissipation by up to one order of magnitude can be realize
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