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Dec 17, 2014Open Access
This
study investigated the magnetospheric and ionospheric sources of geomagnetic
field variation using the data set that consists of the hourly values of the
geomagnetic element: horizontal intensity H,
recorded at the geomagnetic observatory of the Department of physics,
university of Ilorin, Ilorin (Long 4.670 and Lat. 8.50, dip 4.1°S)
Nigeria for the months of august, October and December in the year 2008. The
study attributed the daytime variation to the ionospheric sources while var...
Dec 16, 2014Open Access
The capacitance of a Metal-Insulator-Metal (MIM) capacitor first
described in United States Letters Patent 20070278551 (2007) is analysed in
three dimensions. The finite element computer program is given so that others
may make similar calculations with their own dimensions and dielectric materials.
Plots of potentials and fields are presented.
Dec 15, 2014Open Access
Understanding the propagation of acoustic waves
through a liquid-perfused porous solid framework such as cancellous bone is an
important pre-requisite to improve the diagnosis of osteoporosis by ultrasound.
In order to elucidate the propagation dependence upon the material and
structural properties of cancellous bone, several theoretical models have been
considered to date, with Biot-based models demonstrating the greatest
potential. This paper describes the fundamental basis of these models and...
Dec 12, 2014Open Access
Weathering of biomarkers is a physical, geochemical and biological process
that alters the oil components. Whether in petroleum geochemistry or
environmental impact studies, knowledge of mechanisms, residence times and
chemical intermediates is essential to describe the scientific and technical
bases of oil deterioration. This report attempts to review the concepts of oil
weathering and its biomarkers specifically, in order to inform studies related
to the impact of spills in marine environments...
Dec 11, 2014Open Access
Wetlands are one of our most important yet endangered and under-valued
environments. Sustainable management of wetland ecosystem is necessary as it
serves the important functions such as food storage, water quality maintenance
and providing habitat for different species of wildlife. More than 75% of commercial
fish species require wetlands to complete part of their life cycle. Many local
and migratory birds also utilize coastal wetlands as breeding and roosting
sites as well as providing food an...
Dec 10, 2014Open Access
Currently, the model is based on the Clinical
Laboratory. It is a great centre that performs almost all of the techniques. Thanks to the automation of them. These
laboratories receive samples from centres that often are some kilometers away.
Time spent between collection and processing must be as short as possible and this is a requirement to
care about in order to process the samples in optimal conditions.
Transport logistic factor is essential to achieve the right balance between
optimal quali...
Dec 09, 2014Open Access
The state of North Carolina
continues to grow at a rapid
rate. The rise of negatively impacted streams, particularly within urbanizing
counties, continues to expand. Considerable effort and public funding are spent
through a variety of agencies that attempt to deal with the problem on a
collaborative basis through management networks. A study using surveys, a plan
quality rating tool and the U.S. Environmental Protection Agency (EPA) list of
impaired (303d) streams was conducted to determine the...
Dec 08, 2014Open Access
Background: Odot is the head-quarter of Nsit-Atai
local government, 70 kilometers from Uyo, the Akwa-Ibom state capital. About 5000
population has a Comprehensive Health Center, a Primary Health Centre and 2
Health Posts to meet its enormous health needs. Additionally, the workers in
these health facilities are neither trained nor equipped to render eye care
services. Patients with systemic diseases with potentially debilitating effects
on vision come to the urban tertiary referral health center...
Dec 05, 2014Open Access
A
swellpacker has the advantages of high isolation reliability and good gas
migration resistance in open holes. This paper analyzed the contact pressure
and stress distribution of the downhole swellpacker, and optimized rubber
structure for various formations. 1) The research shows that thermal expansion
can better explain the expanding process of the rubber after adsorption of oil.
2) The maximum contact pressure occurs in the middle of rubber, and the sealing
effect of the packer increases exp...
Dec 04, 2014Open Access
The tourism industry has a higher dependence on natural and cultural
resources and is more vulnerable to environmental impacts than any other
industry. It faces a plethora of issues, risks, and opportunities related to sustainability
and environmental change. The hotel industry is one of the most important parts
of tourism. Three China Green certified hotels (the
Guesthouse International Hotel Sanya, the Leaguen Resort Sanya Bay and the Boao
Golden Coast Hot Spri ...
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