1,067 research outputs found

    An Investigation Of Factors Impacting The Use Of Technology In A Home School Environment

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    Home school populations have been studied for socialization and academic preparedness, but there are few studies on the use of technology among home schooled families.  One researcher, in studying technology use among home school families in the greater Albany, New York area, found that the use of technology had a positive influence on the decision to home school and to allow home school families to create and maintain groups of like-minded home schoolers in their quest to educate their children. The objectives of this study are to understand what technologies are being used by home school families and about perception of technology in four areas of technology usage: 1) to build social networks, 2) acquire and share knowledge, 3) administrative actions and 4) instructional activities.  This research shows that when technology is perceived as easier to use, it will lead to perceived usefulness, at a higher significance than leading to actual use.  Further, it was surprising that the models did not show perceived usefulness leading to actual use, which is indicated in the literature

    The Surface Wave Magnitude for the 9 October 2006 North Korean Nuclear Explosion

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    Surface waves were generated by the North Korean nuclear explosion of 9 October 2006 and were recorded at epicentral distances up to 34°, from which we estimated a surface wave magnitude (M_s) of 2.94 with an interstation standard deviation of 0.17 magnitude units. The International Data Center estimated a body-wave magnitude (m_b) of 4.1. This is the only explosion we have analyzed that was not easily screened as an explosion based on the differences between the M_s and m_b estimates. Additionally, this M_s predicts a yield, based on empirical M_s/yield relationships, that is almost an order of magnitude larger than the 0.5–1 kt reported for this explosion. We investigate how emplacement medium effects on surface wave moment and magnitude may have contributed to the yield discrepancy

    Pseudoedge--a hierarchical skeletal modeler for the computer aided design of structural components

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    Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1991.Includes bibliographical references (p. 121-122).by David Leo Bonner.M.S

    Calculating conical diffraction coefficients

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    EThOS - Electronic Theses Online ServiceGBUnited Kingdo

    1.6 W continuous-wave Raman laser using low-loss synthetic diamond

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    Low-birefringence (Δn<2x10−6), low-loss (absorption coefficient <0.006cm−1 at 1064nm), single-crystal, synthetic diamond has been exploited in a CW Raman laser. The diamond Raman laser was intracavity pumped within a Nd:YVO4 laser. At the Raman laser wavelength of 1240nm, CW output powers of 1.6W and a slope efficiency with respect to the absorbed diode-laser pump power (at 808nm) of ~18% were measured. In quasi-CW operation, maximum on-time output powers of 2.8W (slope efficiency ~24%) were observed, resulting in an absorbed diode-laser pump power to the Raman laser output power conversion efficiency of 13%
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