The traffic volume of the data transmission is increasing each year with the explosive growth of the Internet. The networking technologies supporting the data transmission are optical fiber transmission technologies. In the physical layer, the networks are classified into three networks, the long-haul network that connects city to city, the metropolitan area network that connects the central st...

Decision support of air quality management needs to connect several categories of the input data with the analytical process of air pollution dispersion. The aim of the respective model of air pollution is to provide a quantitative assessment of environmental impact of emission sources in a form of spatial/temporal maps of pollutants’ concentration or deposition in the domain. These results are...

The term high-tech has always denoted a very ambiguous and amorphous concept. An industry or an occupational field that is commonly known as high-tech one year could be using technology or skills that are considered to be standard only a few years later. Low-skilled workers can be found in industries known as high-tech, and most people would not consider these workers to be employed in high-tec...

Wireless Local area networks (wLANs), particularly from standards 802.1b/g, have become extremely widespread in a very short time, in society in general as well as at an industrial level. One of the limitations of this technology is its coverage. The family of new standards, such as 802.16, allows us to overcome these limitations, enabling then their use as Metropolitan Area Networks (MAN), as ...

55 Wireless mesh networks combine three key features: the use of wireless transmission , the multi-hop nature of the end-to-end communication, and the availability of multiple paths. While each of these features raises a host of technical issues, at the same time they provide those advantages that make wireless mesh networks appealing. For instance, wireless transmission offers ubiquitous cover...

Baylisascaris procyonis, the raccoon roundworm responsible for fatal larva migrans in humans, has long been thought to be absent from many regions in the southeastern United States. During spring 2002, 11 (22%) of 50 raccoons trapped in DeKalb County, Georgia, had B. procyonis infection. The increasing number of cases highlight this emerging zoonotic infection.

Every day thousands of individuals in the greater DC area use the WMATA Metro system to get from place to place. The Metro has collected a lot of information on riders including when and where they pass through turnstiles. In “the spirit of open data and collaboration,” the Metro has released data on stationto-station rider counts (1). The release was an open invitation for the public to analyz...

1. Sengupta R, Rosenschein L, Gilbert M, Weiller C. Ecoregional dominance in spatial distribution of avian infl uenza (H5N1) outbreaks. Emerg Infect Dis. 2007;13:1269–70. 2. Jourdain E, Gauthier-Clerc M, Bicout DJ, Sabatier P. Bird migration routes and risk for pathogen dispersion into western Mediterranean wetlands. Emerg Infect Dis. 2007;13:365–72. 3. Olsen B, Munster VJ, Wallensten A, Walden...

In the mountains north of New York City a number of cities and towns are being absorbed by the suburbs of one of the largest cities on the planet. The existence of independent communities has created some confusion in terms of classification in the past. Since 1970, Orange County has variously been classified as part of the Newburgh-Middletown Metropolitan Area, the Poughkeepsie-Newburgh Metrop...