Number Of Cell Phones Research Articles

Adaptive Mobility Mapping for People Tracking Using Unlabelled Wi-Fi Shotgun Reads

Mobility tracking plays an important role in identifying human activities and providing location-based services (LBSs). Up to now, with the help of special infrastructures or hardware devices, many existing tracking systems involve some cumbersome work of fingerprint or landmark calibration. In this letter, we present an adaptive mobility map construction scheme for large-scale Wi-Fi mobility tracking in indoor areas which does not require any off-line fingerprinting effort or deployment of landmarks. Our scheme works by collecting a large data-set of Wi-Fi received signal strength using a large number of cell phones carried by users during their normal daily activities.

A Web-based, Offline-able, and Personalized Runtime Environment for executing applications on mobile devices

An increasing number of people use cell phones daily. Users are not only capable of making phone calls, but can also install applications on their mobile phones. When creating mobile applications, developers usually encounter the cross-platform incompatibility problem (for example, iPhone applications cannot be executed on the Android platform). Moreover, because mobile Web browsers have increasingly supported more and more Web-related standards, Web applications are more possible to be executed on different platforms than mobile applications. However, the problem of Web application is that it cannot be executed in offline mode. This study proposes a Web-based platform for executing applications on mobile devices. This platform provides several services for developers such as offline service, content adaptation service, and synchronization service. With the help of the proposed platform, application developers can develop and publish offline Web applications easily with simplified external Web content and synchronization capability.

The Design and Implementation of an Automated System for Logging Clinical Experiences Using an Anesthesia Information Management System

Residents in anesthesia training programs throughout the world are required to document their clinical cases to help ensure that they receive adequate training. Current systems involve self-reporting, are subject to delayed updates and misreported data, and do not provide a practicable method of validation. Anesthesia information management systems (AIMS) are being used increasingly in training programs and are a logical source for verifiable documentation. We hypothesized that case logs generated automatically from an AIMS would be sufficiently accurate to replace the current manual process. We based our analysis on the data reporting requirements of the American College of Graduate Medical Education (ACGME). We conducted a systematic review of ACGME requirements and our AIMS record, and made modifications after identifying data element and attribution issues. We studied 2 methods (parsing of free text procedure descriptions and CPT4 procedure code mapping) to automatically determine ACGME case categories and generated AIMS-based case logs and compared these to assignments made by manual inspection of the anesthesia records. We also assessed under- and overreporting of cases entered manually by our residents into the ACGME website. The parsing and mapping methods assigned cases to a majority of the ACGME categories with accuracies of 95% and 97%, respectively, as compared with determinations made by 2 residents and 1 attending who manually reviewed all procedure descriptions. Comparison of AIMS-based case logs with reports from the ACGME Resident Case Log System website showed that >50% of residents either underreported or overreported their total case counts by at least 5%. The AIMS database is a source of contemporaneous documentation of resident experience that can be queried to generate valid, verifiable case logs. The extent of AIMS adoption by academic anesthesia departments should encourage accreditation organizations to support uploading of AIMS-based case log files to improve accuracy and to decrease the clerical burden on anesthesia residents.

The cell phone effect on pedestrian fatalities

This paper examines the impact of cell phone usage on pedestrian fatalities in the United States using econometric models and specification error tests. The model makes use of a polynomial specification so as to allow for potential life-saving and life-taking effects of cell phones. The results indicate that when cell phones were first introduced they had an adverse effect on pedestrian safety, but after a critical number of cell phones was reached, the life-saving effect dominated over the life-taking effect. However, as the number of phones continued to increase, the life-taking effect once again dominated over the life-saving effects.

Téléphone mobile, risque de tumeurs cérébrales et du nerf vestibuloacoustique : l'étude cas-témoins INTERPHONE en France

Background Use of cell phones has increased dramatically since 1992 when they were first introduced in France. Certain electromagnetic fields (at extremely low frequency) have been recognized as possibly carcinogenic by the International Agency for Research on Cancer. Given the use of radiofrequency technology in cell phones, the rapid increase in the number of cell phones has generated concerns about the existence of a potential health hazard. To evaluate the relationship between the use of cell phones and the development of tumors of the head, a multicentric international study (INTERPHONE), coordinated by the International Agency for Research on Cancer, was carried out in 13 countries. This publication reports the results of the French part of the INTERPHONE study. Methods INTERPHONE is a case-control study focused on tumors of the brain and central nervous system: gliomas, meningiomas and neuromas of cranial nerves. Eligible cases were men and women, residents of Paris or Lyon, aged 30–59, newly diagnosed with a first primary tumor between February 2001 and August 2003. The diagnoses were all either histologically confirmed or based upon unequivocal radiological images. Controls were matched for gender, age (± 5 years) and place of residence. They were randomly drawn from electoral rolls. Detailed information was collected for all subjects during a computer-assisted face-to-face interview. Conditional logistic regression was used to estimate the odds ratio (OR) for an association between the use of cell phones and risk of each type of cancer. Results Regular cell phone use was not associated with an increased risk of neuroma (OR = 0,92; 95% confidence interval = [0.53–1.59]), meningioma (OR = 0,74; 95% confidence interval = [0.43–1.28]) or glioma (OR = 1.15; 95% confidence interval = [0.65–2.05]). Although these results are not statistically significant, a general tendency was observed for an increased risk of glioma among the heaviest users: long-term users, heavy users, users with the largest numbers of telephones. Conclusion No significant increased risk for glioma, meningioma or neuroma was observed among cell phone users participating in Interphone. The statistical power of the study is limited, however. Our results, suggesting the possibility of an increased risk among the heaviest users, therefore need to be verified in the international INTERPHONE analyses.

A cochlear implant user's guide to assistive devices and telephones

A cochlear implant user's guide to assistive devices and telephones