The radiation of RFID anti-theft gate system based on two parallel coaxial square loop antennas has been analyzed. The system was simulated in FEKO and near electric and magnetic fields have been calculated. A physical model of the system was realized and near magnetic field was measured. Measurement results were found to be in excellent agreement with the simulation. The obtained simulation an...

large volumes of mostly irreparable electronic waste (e-waste) are shipped to africa on a monthly basis, of which nigeria receives the largest share. e-waste management practices in nigeria have remained completely primitive until date; and e-waste workers have little or no occupational safety knowledge and devices. the thousands of chemicals in e-waste have been reported to be toxic to human h...

conclusions based on existing data, hiv infection surveillance, performance of standard precaution, and post exposure prophylaxis with anti-retroviral drugs outlined in this review article represent reasonable interim approaches to this complex problem. context human immunodeficiency virus (hiv) infection and acquired immunodeficiency syndrome (aids) concentrated in injecting drug users (idus) ...

Malignant mesothelioma is an uncommon but rapidly fatal disease for which the principal aetiological agent is exposure to asbestos. Mesothelioma is of particular significance in Australia where asbestos use was very widespread from the 1950s until the 1980s. Exposure to asbestos includes occupational exposure associated with working with asbestos or in workplaces where asbestos is used and also...

OBJECTIVE To determine the role of environmental pollutants in the etiology of nasal polyposis. DESIGN Case-control study. SETTING A community-based hospital practice in the Gaspesian peninsula in rural northeastern Quebec. PATIENTS Fifty-five case patients with nasal polyposis and 55 age-matched control subjects without nasal polyposis who were seen at one physician's practice (J.K.) fro...

We recently completed a review of scientific evidence, particularly epidemiologic evidence, regarding the contribution of environmental and occupational exposures to the overall cancer burden in the US. We evaluated the efforts to estimate the proportion of cancer due to these involuntary exposures, including the ambitious effort by Doll and Peto and an update by a group of authors at the Harva...

This study was initiated to determine and compare daily occupational exposure (OE) and non-occupational exposure (NOE) of three employee groups of teachers, maintenance workers and secretarial staff in a Canadian school district. The time-weighted average (TWA) individual OE for subjects ranged from 0.4-3.8 milligauss (mG), and the TWA NOE ranged from 0.2-7.1 mG. TWA OE and NOE were 1.2 mG and ...

BACKGROUND AND OBJECTIVES Although past studies of workplace exposures have contributed greatly to our understanding of carcinogens, significant knowledge gaps still exist with regard to the actual extent of exposure among current workers, with no routinely collected population-based data being available in most countries. This study, the Australian Work Exposures Study (AWES), aimed to investi...

Toxic effects of formaldehyde in humans are discussed in relation to occupational exposure and tolerance to this agent. Carcinogenic and mutagenic properties of formaldehyde have been reported in animals and this has led to concern about a possible role in human cancer. The current state of affairs is reviewed in the light of a lack of direct evidence linking formaldehyde with cancer in man and...