introduction blood pressure (bp) is one of the important vital signs that need to be monitored for personal healthcare. arterial blood pressure is estimated from pulse transit time (ptt). this study uses two pulse sensors to get ptt. the aim of this study was to construct an optical system and to monitor blood pressure continuously and without cuff in people with different ages. materials and m...

Small ubiquitous devices connected by wireless networks will become future Internet appliances. To support them, communication networks must evolve to seamlessly assist appliances and provide advanced functionalities. We present a personal communication environment called Omnisphere that provides a communication and information universe surrounding wireless appliances. It is based on a high lev...

Personal mobility (PM) is one of the key issues in realizing personal communications service (PCS) in emerging thirdgeneration mobile communication networks such as International Mobile Telecommunication 2000 (IMT-2000). It can be realized through universal personal telecommunication (UPT) service. Two PM management schemes are proposed to manage PM information related to UPT users for incoming...

While in recent years bandwidth, connectivity and world wide data communication have become cheap and ubiquitous, the problem of storing and preserving personal digital data is still largely unsolved. Most users struggle with preserving data, moving data from one PC generation to the next, finding personal documents on one’s own hard drive and sharing personal documents with others. This paper ...

There has been rapid growth in demand for mobile communications over the past few years that has led to intensive research and development of complex PCS (personal communication service) networks. Capacity planning and performance modeling is necessary to maintain a high quality of service to the mobile subscriber while minimizing cost. Simulation is widely used in such studies, however, becaus...

Personal Networks (PN) are future communication systems that combine wireless and infrastructure based networks to provide users a variety of services anywhere and anytime. PNs introduce new design challenges due to the heterogeneity of the involved technologies, the need for self-organization, the dynamics of the system composition, the application-driven nature, the co-operation with infrastr...

Current wireless personal area network (WPAN) standards provide no method for two previously unacquainted parties to authenticate to one another in a trusted manner upon first encounter. The paper details the research leading up to the development of Friendly Authentication and Communication Experience (FACE). The FACE methodology will be developed to be independent of wirelessly enabled mobile...

This study brings together the literature on social network approaches to social capital and health and on migration and HIV risks to examine how non-migrating wives of labor migrants use their personal networks to cope with perceived risks of HIV infection in rural southern Mozambique. Using data from a 2006 survey of 1,680 women and their dyadic interactions, we compare the composition of per...

The rapid proliferation of personal computers, offering tremendous productivity gains for knowledge workers, often creates new application maintenance tasks. Specific concerns include security, data integrity, and access authorization. Distributed networks require security and communication systems. Distributed data entry requires file servers, network support personnel, and synchronization met...

The purpose of the microprocessor – based controller described in the present study is to enable the measurements by means of EL-11D ellipsometer system to be carried in automatic mode. The geometry of optic components of the ellipsometer system can be changed in MANUAL and AUTOMATIC modes by means of the controller. Three keys incorporated on the front panel are used for setting of the ellipso...