3,339 research outputs found
The design of a professional development program for technology integration
Although teachers recognize the use of technology in their classrooms has a positive influence on their students, efforts to learn the technology integration are often limited by barriers. The purpose of this project was to document the whole process of designing and developing a professional development program for technology integration to break out barriers. By conducting a literature review I gained a better understanding for professional development of instructional technologies. After collaboratively conducting the context analysis with my colleagues, I designed, developed and implemented thirteen sessions of the professional development sessions. I got the on-going feedback as the formative evaluation. I also conducted a beta-testing for the summative evaluation. This report ends with the plan for future changes
Cosmological Implications of the Tetron Model of Elementary Particles
Based on a possible solution to the tetron spin problem, a modification of
the standard Big Bang scenario is suggested, where the advent of a spacetime
manifold is connected to the appearance of tetronic bound states. The metric
tensor is constructed from tetron constituents and the reason for cosmic
inflation is elucidated. Furthermore, there are natural dark matter candidates
in the tetron model. The ratio of ordinary to dark matter in the universe is
calculated to be 1:5.Comment: 23 page
State-of-the-art in Power Line Communications: from the Applications to the Medium
In recent decades, power line communication has attracted considerable
attention from the research community and industry, as well as from regulatory
and standardization bodies. In this article we provide an overview of both
narrowband and broadband systems, covering potential applications, regulatory
and standardization efforts and recent research advancements in channel
characterization, physical layer performance, medium access and higher layer
specifications and evaluations. We also identify areas of current and further
study that will enable the continued success of power line communication
technology.Comment: 19 pages, 12 figures. Accepted for publication, IEEE Journal on
Selected Areas in Communications. Special Issue on Power Line Communications
and its Integration with the Networking Ecosystem. 201
New proton polarized structure functions in charged current processes at HERA
Estimates for longitudinal spin asymmetries which single out new polarized
nucleon structure functions in deeply inelastic charged current interactions at
HERA energies are given, exploiting their interpretation in terms of polarized
quark distributions. These asymmetries turn out to be large and allow a
measurement of the new polarized structure functions and ,
which would add valuable tests and information on the spin content of quarks
inside a polarized proton. We also show that single spin asymmetries in neutral
current interactions are very small.Comment: LaTeX, 8 pages, 6 figure
Cholesterol and coronary heart disease: screening and treatment
Coronary heart disease (CHD) is a major cause of morbidity and mortality in the United Kingdom, accounting for just under one quarter of all deaths in 1995: 27% among men and 21% among women.1 Although many CHD deaths occur among elderly people, CHD accounts for 31% of male and 13% of female deaths within the 45–64 age group
Polarized top decay into polarized W: t(up)->W(up) + b at O(alpha_s)
We consider the decay of a polarized top quark into a polarized W-boson plus
a bottom quark, followed by the decay of the W-boson into a pair of leptons or
quarks. The polar angle distribution of the top spin relative to the W-momentum
and the polar angle distribution of the lepton (or quark) in the W-rest frame
is governed by three polarized and three unpolarized rate functions which are
related to the double density matrix elements of the decay . We
obtain analytical expressions for the radiative corrections to
the three polarized and three unpolarized rate functions. We also provide a
comprehensive discussion of the dependence of the longitudinal, transverse and
normal polarization of the top quarks produced at -colliders on beam
polarization parameters.Comment: 13 pages, 3 postscript figures added, file standard.sty included,
material on normal polarization added, some misprints correcte
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