نتایج جستجو برای: cellular phone

تعداد نتایج: 478229  

Journal: :American journal of epidemiology 2014
Daniel A Gundersen Kurt R Peters Ashley Conner James Dayton Cristine D Delnevo

During the 2000s, rapid adoption of cellular phones and foregoing of landline telephones (i.e., wireless substitution) were observed (1–3). This affected behavioral surveillance by creating a staggering decrease in coverage for surveys that relied on random-digit dialing (RDD) sampling, resulting in biased health estimates (1–5). During this time, innovative sampling approaches that integrated ...

Journal: :Human factors 2007
Anne-Marie Chany William S. Marras Deborah L. Burr

OBJECTIVE To compare a small cellular clamshell phone with a traditional office phone in the development of discomfort and muscle fatigue over time during phone use. BACKGROUND Phone use involves low-level static exertions that may be influenced by phone design. Phone design and its interactions with anthropometry may change shoulder and hand postures assumed during use, which in turn may mod...

Objective(s): The increasing rate of over using cell phones has been considerable in youths and pregnant women. We examined the effect of mobile phones radiation on genes expression variation on cerebellum of BALB/c mice before and after of the birth. Materials and Methods: In this study, amobile phone jammer, which is an instrument to prevent receiving signals between cellular phonesand base t...

Journal: :Accident; analysis and prevention 2005
David Shinar Noam Tractinsky Richard Compton

Experimental research on the effects of cellular phone conversations on driving indicates that the phone task interferes with many driving-related functions, especially with older drivers. Unfortunately in past research (1) the dual task conditions were not repeated in order to test for learning, (2) the 'phone tasks' were not representative of real conversations, and (3) most often both the dr...

Journal: :iranian journal of management studies 2013
ali shirazi hanzaleh zeynvand lorestani ahmadreza karimi mazidi

a key challenge to brand managers is how to gain a better understanding of the relationship between brand and customer loyalty constructs. researchers have recognized that brand identity plays a key role in brand management. the purpose of this paper is to investigate the effect of brand identity and brand identification on brand loyalty through perceived value, customer satisfaction, and trust...

2008
William Enck Machigar Ongtang Patrick McDaniel

Mobile phones running open operating systems such as Google Android will soon be the norm in cellular networks. These systems expose previously unavailable phone and network resources to application developers. However, with increased exposure comes increased risk. Poorly or maliciously designed applications can compromise the phone and network. While Android defines a base set of permissions t...

2013
Rajesh Kumar Dubey Sunil Kumar

Tanzania telecommunication sector has witnessed fast growth in the number of mobile telephone users now served by seven cellular operators. Until February 2012, there were about 26 million mobile phone subscribers served by more than 4,000 base stations spread all over the country. Despite the many advantages brought by these systems, there is increased public concern over possible adverse heal...

Journal: :American journal of epidemiology 2004
Helle Collatz Christensen Joachim Schüz Michael Kosteljanetz Hans Skovgaard Poulsen Jens Thomsen Christoffer Johansen

Despite limited evidence, cellular telephones have been claimed to cause cancer, especially in the brain. In this Danish study, the authors examined the possible association between use of cellular telephones and development of acoustic neuroma. Between 2000 and 2002, they ascertained 106 incident cases and matched these persons with 212 randomly sampled, population-based controls on age and se...

2014
Keen Sung Brian Neil Levine Marc Liberatore

Cellular network operators can track the location of cell phone users as they connect to different towers. Operators may not directly control the user’s phone, but they do supply and control the SIM card that identifies the user. We seek to preserve a cellular phone user’s location privacy from cellular network operators. We propose the ZipPhone protocol for secure, virtual, and therefore easil...

2007
Ching-I Huang William Rogerson James Heckman Chung-Ming Kuan

I present a game-theoretical model to estimate consumption demand, accounting for intra-household interaction among household members. Although multiple Nash equilibria of consumption decisions may exist in a household, model parameters are pointwise identified from household-level data for households with only two members. I propose a semiparametric maximum likelihood estimator and apply it to...

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