«The battle for control of public airwaves is nothing new. Following in the steps of radio and cellular telephones, wireless Internet – or wireless fidelity, known and trademarked as WiFi – is becoming the next major wireless permanent...» Document abstract
$4.95
5 word format
Language : english
computer science
presentation
date published
01/05/2008
review : not yet assessed
level : Advanced
requested 0 times
SummaryThe battle for control of public airwaves is nothing new. Following in the steps of radio and cellular telephones, wireless Internet – or wireless fidelity, known and trademarked as WiFi – is becoming the next major wireless permanent infrastructure accessed in urban public space. As such, regulatory concerns arise about this third generation of wireless technology (Werbach 2003), as do conflicts in varied visions for the future. A number of the nation’s growing cities are working to build up the faculties needed for wireless Internet citywide, and with that growth comes the promise of networks and accessibility for all. A leading expert on wireless technology, Craig Mathias from FarPoint Group in Ashland, MA, explained, “Every major city is going to have some kind of citywide Wi-Fi access. It will become an expectation like electricity or telephone service” (Reardon 2005). Without always understanding the technology at hand, several major cities have already begun to commit resources to building necessary infrastructure, both to serve the general public as well as close the digital divide (Werbach 2003).Indeed, the prevalence of wireless Internet access continues to rise, beginning to catch up with broadband and high speed Internet connections that now service over 37 million people in the United States, up from just 7 million in 2000, according to the Federal Communication Commission (Lehrer 2006). Wireless Internet, requiring less complicated technical infrastructure, is a less expensive option if geography allows for its penetration into all areas attempting to access service from the same connection.
key words- ubicomp model, antenna, WiFi-NY’s, NYCwireless, Earthlink, ACLU 2007, wireless technology
key words- ubicomp model, antenna, WiFi-NY’s, NYCwireless, Earthlink, ACLU 2007, wireless technology
«Climate change is now widely recognised as a long term threat. It is thought that the climate is being changed by the increasing emissions of greenhouse gases, especially CO2, arising from human activities.
Useful reductions in CO2 emissions can be...» Document abstract
$9.95
33 slides .ppt
Language : english
geology
presentation
date published
28/04/2008
review : not yet assessed
level : Advanced
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SummaryClimate change is now widely recognised as a long term threat. It is thought that the climate is being changed by the increasing emissions of greenhouse gases, especially CO2, arising from human activities.
Useful reductions in CO2 emissions can be achieved by fuel switching and improving energy efficiency. This presentation will cover both the experience
from this project as well as the results found in the
Statoil SACS program (Saline Aquifer CO2 storage
programme), a 4,5 million Euro R&D programme
run under the European Union R&D Framework
programme, involving numerous European geological survey institutions and energy companies together with the IEA Greenhouse Gas R&D Programme.
«Half of all cardiac deaths are sudden, accounting for approximately 300,000 deaths per year in the United States. SCD is death due to instantaneous, unanticipated circulatory collapse within 1 hour of initial symptoms and is often, but not always,...» Document abstract
$9.95
40 slides .ppt
Language : english
medical studies
presentation
date published
28/04/2008
review : not yet assessed
level : Advanced
requested 0 times
SummaryHalf of all cardiac deaths are sudden, accounting for approximately 300,000 deaths per year in the United States. SCD is death due to instantaneous, unanticipated circulatory collapse within 1 hour of initial symptoms and is often, but not always, due to a cardiac arrhythmia. More than 70% of all sudden natural deaths have a cardiac cause, and 80% of these are attributable to coronary artery disease. Approximately 70% of SCDs occur in men. Compared with routine activities, vigorous exercise increases the immediate risk of SCD 17-fold.
«Development of T & B Lymphocytes
Thymus-derived cells (T lymphocytes) mediate cellular immune responses; bone marrow-derived cells (B lymphocytes) are involved in humoral immunity. Both T and B lymphocytes are derived from precursor or stem cells...» Document abstract
$9.95
22 slides .ppt
Language : english
medical studies
presentation
date published
25/04/2008
review : not yet assessed
level : Advanced
requested 0 times
SummaryDevelopment of T & B Lymphocytes
Thymus-derived cells (T lymphocytes) mediate cellular immune responses; bone marrow-derived cells (B lymphocytes) are involved in humoral immunity. Both T and B lymphocytes are derived from precursor or stem cells in the marrow.
Precursors of T cells migrate to the thymus, where they develop some of the functional and cell surface characteristics of mature T cells. Through positive and negative selection, clones of autoreactive T cells are eliminated, and mature T cells migrate to the peripheral lymphoid tissues.
«Clinical manifestations resembling allergic hypersensitivity can also occur in the absence of an immunologic mechanism. Specific examples include nonallergic (intrinsic) asthma, which is triggered by the effect of inhaled dusts and fumes, weather...» Document abstract
$9.95
20 slides .ppt
Language : english
medical studies
presentation
date published
25/04/2008
review : not yet assessed
level : General public
requested 0 times
SummaryClinical manifestations resembling allergic hypersensitivity can also occur in the absence of an immunologic mechanism. Specific examples include nonallergic (intrinsic) asthma, which is triggered by the effect of inhaled dusts and fumes, weather changes, viral respiratory infections, and stress rather than by aeroallergen-induced IgE-mediated mast cell degranulation; irritant dermatitis, the result of physical or chemical damage to skin rather than development of sensitized lymphocytes; and "anaphylactoid reactions" from nonimmunologic release of mast cell mediators.
«With injuries happening daily it is no wonder that the medical field is constantly growing and evolving. This field has actively changed since its early incarnation during the Roman Era in which medicine was based on theory not science (Greig 41)....» Document abstract
$3.95
4 word format
Language : english
medical studies
presentation
date published
25/04/2008
review : not yet assessed
level : General public
requested 0 times
SummaryWith injuries happening daily it is no wonder that the medical field is constantly growing and evolving. This field has actively changed since its early incarnation during the Roman Era in which medicine was based on theory not science (Greig 41). With practices based on theory the profession was bound to change. It was more or less forced to change. The medical profession has switched its focus from a people-centric profession to a profit driven industry at the cost of the patient's health and wallet.
«In today’s environment of advanced medical practices and practitioners, it still amazes me that some doctor’s are so set in their ways that they are not willing to try alternative therapies for more debilitating conditions. When scientists can clone...» Document abstract
$1.95
2 word format
Language : english
medical studies
presentation
date published
25/04/2008
review : not yet assessed
level : General public
requested 0 times
SummaryIn today’s environment of advanced medical practices and practitioners, it still amazes me that some doctor’s are so set in their ways that they are not willing to try alternative therapies for more debilitating conditions. When scientists can clone animals, cure diseases from newborn stem cells and put stints in major arteries to restore blood flow to vital areas, it would lead me to believe that most medical practitioners would be open to trying almost anything to help their patients.
«The Giant Panda, scientifically known as the Ailurodopa melanoleuca, is considered an endangered species found in a few mountain ranges in central China, Sichuan, Shannxi, and the Gansu Provinces, according to the Smithsonian National Zoological...» Document abstract
$2.95
3 pdf format
Language : english
biology
presentation
date published
23/04/2008
review : not yet assessed
level : General public
requested 0 times
SummaryThe Giant Panda, scientifically known as the Ailurodopa melanoleuca, is considered an endangered species found in a few mountain ranges in central China, Sichuan, Shannxi, and the Gansu Provinces, according to the Smithsonian National Zoological Park. The Smithsonian Zoo continues to add that they used to live “in lowland areas, but farming, forest clearing, and other development now restrict Giant Pandas to the mountains.” Paul Massicot, founder and editor of the Internet source www.animalinfo.org, helps with the physical description. Massicot states the Giant Panda weighs in the range of one hundred and fifty pounds to two hundred and seventy five pounds.
«In humans, the suprachiasmatic nucleus (SCN) controls the body’s circadian rhythms. Each day, sighted people have the opportunity to reset their internal clock based on the amount of ambient light entering their retinas. The retina contains a subset...» Document abstract
$3.95
4 word format
Language : english
medical studies
case study
date published
15/04/2008
review : not yet assessed
level : Advanced
requested 0 times
SummaryIn humans, the suprachiasmatic nucleus (SCN) controls the body’s circadian rhythms. Each day, sighted people have the opportunity to reset their internal clock based on the amount of ambient light entering their retinas. The retina contains a subset of retinal ganglion cells specialized in regulating the body’s rhythms. These ganglion cells project to the SCN from both eyes via the retinohypothalamic pathway. But how do completely blind people synchronize with their environment? Non-photic cues may help blind people sense the passage of time, but they are not always enough to regulate the body’s cycle of body temperature and hormones.
Keywords: Intrinsically photosensitive retinal ganglion cells (ipRGCs), retina, olivary pretectal nucleus (OPN)
Keywords: Intrinsically photosensitive retinal ganglion cells (ipRGCs), retina, olivary pretectal nucleus (OPN)
«The objective of this experiment is to determine the total concentration of metal ions required to completely react with EDTA, or ethylene diamine tetra-acetate. The concentration determined will then be taken as the equivalent concentration of...» Document abstract
$3.95
4 word format
Language : english
physics & chemistry
course material
date published
15/04/2008
review : not yet assessed
level : Advanced
requested 0 times
SummaryThe objective of this experiment is to determine the total concentration of metal ions required to completely react with EDTA, or ethylene diamine tetra-acetate. The concentration determined will then be taken as the equivalent concentration of Ca2+ and Mg2+. Ca2+ will be analyzed separately in an additional titration after Mg(OH)2 has been precipitated from the solution using a strong base.
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