eLearning

Kenneth Buckle, a visiting scientist at the Center
for Integrated Manufacturing Studies at the Rochester
Institute of Technology, provides this answer:
When connected to a load like a lightbulb, a typical battery
undergoes chemical reactions that release electrons, which
travel through the bulb and are then reabsorbed by the battery.
(Devices that store mechanical energy also exist, but the most
common bat ter ies ,  such as those used in fl  ashlights and   remotes,
hold energy in chemical form.) Inside is at least one galvanic
cell, which produces between zero and several volts,   depending
on its chemistry. In a car battery, six cells, each contributing
two volts, are connected in series …

David W. Schindler
ABSTRACT
The results of bottle and mesocosm experiments
were compared with those obtained in whole-
ecosystem experiments at the Experimental Lakes
Area. Unless they can be cleverly designed to mimic
major ecosystem processes and community compo-
sitions, smaller-scale experiments often give highly
replicable, but spurious, answers. Problems with
appropriate scaling are difficult to deduce without
direct comparisons with whole-ecosystem experi-
ments. Reasons aremany, but include inappropriate
spatial scales to include whole communities, in
particular predators and nocturnally active animals;
temporal scales that are too short to assess accu-
rately the response of slow-responding organisms
and biogeochemical processes; and elimination of
key littoral–pelagic and catchment–lake interac-
tions. Identical studies of limnological processes in
lakes of a large …

David A. Starrett
Economists are widely viewed by the general public
as being committed tomarkets as a way of allocating
resources and consequently to the use of market
prices as a reflection of social value. This view has
given economists a bad reputation in some circles;
indeed, there is a cynical definition of an economist
as someone who ‘‘knows the price of everything and
the value of nothing.’’ Whereas economists prob-
ably do as a group have more faith in markets than
others, it certainly is not true that we equate price
with value. We recognize many goods and services
for which there are no markets (such as clean air,
wildlife habitat, and …

Elearning has an extensive scope and higher interdependence and visibility. Thus, if you are eager to learn using this method, it is important to gain knowledge of it in general and get the best out of it. Know what elearning is, its methods and categories, uses and applications, benefits of its tools, and importance.  
However, if you are interested in starting up an elearning institution, it’s more than just those things. Elearning further encompasses program and strategic consulting, content planning, software and system management, hosting and maintenance services, multimedia production, teaching and web site solutions, online evaluation tools and student …

Privacy Policy
Last Updated October 2005
We recognize that privacy is an important issue, so we design and operate our services with the protection of your privacy in mind. This Privacy Policy outlines the types of personal information we gather when you use our website, as well as some of the steps we take to safeguard it.
The following principles apply to the personally identifying information we ask for and that you provide. “Personally identifying information” is information that individually identifies you, such as your name, physical address or email address.
Data collection
Some of our services and/or information requests may require you to register …

W. Y. Ching,
Lizhi Ouyang,
Paul Rulis,
and Hongzhi Yao1
Department of Physics, University of Missouri-Kansas City, Kansas City, Missouri 64110, USA
Department of Physics and Mathematics, Tennessee State University, Nashville, Tennessee 37211, USA
Based on the most recently determined noncubic structure for
-Al2O3 by Menendez-Proupin and Gutierrez,
a comprehensive list of physical properties is investigated theoretically. These include lattice dynamics and
phonon spectra, elastic constants and bulk structural parameters, electronic structure and interatomic bonding,
optical properties, and x-ray absorption near-edge structure
XANES spectra. Compared to similar calcula-
tions of -Al2O3, we find a smaller lowest zone-center vibrational mode at 97.6 cm−1
, a lower heat capacity,
a smaller bulk modulus, and …