Low cost, high speed wireless LAN networks can be integrated within the cellular coverage to provide hot spot coverage for high speed data services. This article presents a novel approach for integrating North American 3G cellular network and 802.11 wireless LAN networks. The intertechnology mobility is supported using the standard cdma2000 functions and signaling.

Port-based network access control makes use of the physical access characteristics of IEEE 802 Local Area Networks (LAN) infrastructures in order to provide a means of authenticating and authorizing devices attached to a LAN port that has point-to-point connection characteristics, and of preventing access to that port in cases in which the authentication and authorization process fails.

BACKGROUND Animal and epidemiologic studies suggest that exposure to light at night (LAN) may disrupt circadian patterns and decrease nocturnal secretion of melatonin, which may disturb estrogen regulation, leading to increased breast cancer risk. OBJECTIVES We examined the association between residential outdoor LAN and breast cancer incidence using data from the nationwide U.S.-based Nurses...

Regulation of diurnal and circadian rhythms and cell proliferation are coupled in all mammals, including humans. However, themolecular mechanisms by which diurnal and circadian rhythms regulate cell proliferation are relatively poorly understood. In this study, we report that tumor growth in nude rats bearing human steroid receptor-negative MCF-7 breast tumors can be significantly accelerated b...

The methodology of switched LAN models construction in the form of colored Petri net is introduced. For the simulation and analysis of the model the Design/CPN tool is used. The tasks of estimation of LAN switch’s buffer size and network response time were solved. The components of the model are switches, servers, and workstations. © 2004 IMACS. Published by Elsevier B.V. All rights reserved.

Radio local area networks (LAN s) would provide flexible, portable communications within factories and office buildings. Such networks will be required for autonomous vehicles and portable equipment. This paper summarizes the results of extensive radio channel measurements recently made in five operating factory buildings and addresses multiple-access considerations for the design of indoor rad...

This paper presents a simulation study of eLearning classroom using iPads as mobile devices based on the wireless LAN with IEEE 802.11b protocol. Moreover, this paper presents a simulation study whether the IEEE 802.11b can support up to 25 iPads of the eLearning classroom without fairness problems on a shared Wireless LAN. The simulation is performed by OPNET IT Guru Academic Edition 9.1.

Several studies over the last decade have suggested that the modern practice of keeping our bodies exposed to artificial light at night, or LAN, increases cancer risk, especially for cancers (such as breast and prostate cancers) that require hormones to grow. Women who work night shifts have shown higher rates of breast cancer, whereas blind women, who are not likely to be exposed to or perceiv...

BACKGROUND Treatment of severe diffuse congenital hyperinsulinism (CHI) without sufficient response to diazoxide is complicated by the lack of approved drugs. Therefore, patients are often hospitalized long-term or have to undergo pancreatic surgery if episodes of severe hypoglycaemia cannot be prevented. A long-acting somatostatin analogue, octreotide, has been reported to be an effective trea...

Regulation of diurnal and circadian rhythms and cell proliferation are coupled in all mammals, including humans. However, the molecular mechanisms by which diurnal and circadian rhythms regulate cell proliferation are relatively poorly understood. In this study, we report that tumor growth in nude rats bearing human steroid receptor-negative MCF-7 breast tumors can be significantly accelerated ...