1,109 research outputs found

    Invertebrates

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    He who doesn\u27t concur with his sep

    Critical Factors that Contribute to Youth at Risk

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    There has been much written about youth at risk. The focus of this writing has been on the challenges that this population continues to create for school systems and teachers in the classroom. This student at risk population is one that has been historically overlooked and traditionally underserved

    Aphrodite Unadorned

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    Friendship is Venus without her wings

    A Rose is a Rose is a Rose : The Definition Debate

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    There has been much discussion and debate among child care workers about the definition of child care workers. Who is a child care worker? What does the child care worker do with children that is unique and different from the teacher, nurse, the social worker, or the psychologist does

    The modelling of nematic liquid crystal phase devices

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    The implementation of nematic liquid crystal optical devices, which exploit the voltage dependent, optical path length modification of the electrical Freedrichsz transition, is presented. By combining refractive elements in a diffractive zone structure, efficient and flexible devices with relatively high refractive powers can be constructed. Continuously variable optical properties can be achieved by scaling the optical profile of the refractive elements and applying a phase correction to ensure that the transition between adjacent zones is an integral number of wavelength, hence a continuous optical profile is constructed. Two such devices are postulated; a variable deflection angle prism and a variable focal length lens, though the approach may be extended to other devices. The zones are addressed through combed electrode structures. The required voltage profile is produced by dropping the applied voltages across a shaped conductive strip. A sampling of the profile is transported along the length of the zone via discrete electrodes. In order to produce the required scalability and independent phase correction of the optical profile, it is necessary to restrict the design and operation of the electrodes to the approximately linear region of the response curve. Two-dimensional optical structures can either be achieved through the use of planar earth plates, to mask connections to the centre of the device, or by cascading devices with electrode structures open to connection at the edges. In order to predict the optical profiles of these and other devices, a model was constructed which describes the director orientation through a two-dimensioned electrode structure. The variational finite element method was employed to minimize the electrical Gibbs free energy of a liquid crystal cell, in order to find the equilibrium director orientation. A preliminary version of this model is presented which is restricted to rotation of the liquid crystal to within the plane of the solution

    An International Exchange Program: Self-Esteem Building and Relationship Development for Youth and Staff

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    Troubled youth can manage, and benefit from, short intensive relationship-centered experiences. This article reports on an innovative staff and client exchange program involving groups from Montreal, Quebec and Washington, D.C. Such experiences, as well as enhancing the youths\u27 cultural awareness and self-esteem, provide exciting staff-development opportunities

    Virtual Environments and Human-Computer Interaction Anxiety: An Experimental Study

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    In a world where interaction is a significant part of everyday life, personal space (PS) – an invisible bubble surrounding human body - is important. This is because PS functions as a comfort zone during interaction, a factor in designing physical environments, and invading such space produces anxiety and discomfort. Little is known, however, about how personal space might operate in virtual environments and what features the interface model of these environments should incorporate in order to reduce the anxiety produced by the invasions of such space in these environments. To begin to address this, we have conducted two experiments concerning personal space invasions (PSI) in collaborative virtual environments (CVE). Results suggest that reactions to PSI in CVE tend to differ in various ways from reactions to PSI in the physical world though some participants experienced anxiety when their avatar personal space was invaded. Recommendations to incorporate some features in the interface model of these environments are presented

    Using Multi-Instructional Teaching and Technology-Supported Active Learning Strategies to Enhance Student Engagement

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    University professors are developing an increasing awareness of how creative teaching is contributing to active learning in the classroom. Much is being learned from research that explores the significance of engaging students in activities designed to increase their learning. This article examines essential components of active learning, discusses ways in which multi-instructional teaching and technology can be used to generate active learning in the classroom, and provides examples of strategies, models, and tools that can be implemented to enhance student engagement and active learning in today\u27s classroo
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