BACKGROUND Physical activity promotes health and longevity. Further elaboration of the role of physical activity for human health in epidemiological studies on large samples requires accurate methods that are easy to use, cheap, and possible to repeat. The use of telecommunication technologies such as cell phones is highly interesting in this respect. In an earlier report, we showed that physic...

Recent research on the impact of cell phones has largely focused on coverage and nonresponse error with few exceptions (Kennedy et al 2009, Brick et al 2011). In this work the authors focus on nonsampling error in the American Time Use Survey (ATUS). This nationally representative survey is conducted by the U.S. Census Bureau on behalf of the Bureau of Labor Statistics. The sample for the ATUS ...

Recent studies have shown that exposing human semen samples to cell phone radiation leads to a significant decline in sperm parameters. In daily living, a cell phone is usually kept in proximity to the groin, such as in a trouser pocket, separated from the testes by multiple layers of tissue. The aim of this study was to calculate the distance between cell phone and semen sample to set up an in...

The purpose of this paper is to revisit the question of what factors influence cell phone banking adoption in South Africa, in the light of an earlier study conducted by Brown, Cajee and Davis. Brown et al. found that in 2002 despite the availability of cell phone banking, very few bank customers were making use of it. Hence a survey was conducted amongst potential users, rather than actual use...

Background and objectives: A considerable increase in using the Internet and cell phone is evident especially among university students. On the other hand, the attention and concerns expressed about the psychological and social effects of long-term use of communicational technologies and the, probably negative, effects on professional future and social relationships are growing. Therefore, the ...

A technique to characterize the fields generated by a cell phone, and projected into an area inside a TEM cell for possible biological interaction studies is described. A double-ended monopole antenna is proposed as the lead signal inducer between the inside and the outside areas of the TEM cell. The coupling voltage at the TEM cell ports and the field distribution within the area under test (A...

A cell phone is an electronic communication device that helps break down the distance barriers between people, with added mobility advantages. For some users a cell phone is more than a communication device; it may be used as a fashion accessory, and for some the cell phone is needed to seek help in emergency situations. The cell phone market has been expanding globally over the past decade, wi...

To meet challenges arising from increasing rates of noncoverage in US landline-based telephone samples due to cell-phone-only households, the Behavioral Risk Factor Surveillance System (BRFSS) expanded a traditional landline-based random digit dialing survey to a dual-frame survey of landline and cell phone numbers. In 2008, a survey of adults with cell phones only was conducted in parallel wit...

OBJECTIVE The performance costs associated with cell phone use while driving were assessed meta-analytically using standardized measures of effect size along five dimensions. BACKGROUND There have been many studies on the impact of cell phone use on driving, showing some mixed findings. METHODS Twenty-three studies (contributing 47 analysis entries) met the appropriate conditions for the me...

BACKGROUND Today's cell phones increase opportunities for activities traditionally defined as sedentary behaviors (e.g., surfing the internet, playing video games). People who participate in large amounts of sedentary behaviors, relative to those who do not, tend to be less physically active, less physically fit, and at greater risk for health problems. However, cell phone use does not have to ...