background: various strategies such as teaching self care to hemodialysis patients have been employed to increase the level of their hope. this study aimed at examining the effects of a telephone follow-up program on the level of hope in a self care education program. methods: in this single-blind randomized controlled clinical trial, 75 hemodialysis patients, selected by convenient sampling, w...

This study examines patterns of cellular phone adoption and usage in an urban setting. One hundred and seventy-six cellular telephone users were surveyed about their patterns of usage, demographic and socioeconomic characteristics, perceptions about the technology, and their motivations to use cellular services. The results of this study confirm that users' perceptions are significantly associa...

a parallel hybrid system of hmm and gmm modeling techniques was implemented and used in a telephony speaker verification and identification system. spectral subtraction and weighted projection measure were used to render this system more robust against additional noise. cepstral mean subtraction method was also applied for the compensation of convolution noise due to transmission channel degrad...

We consider the following communications system: A mobile cellular telephone company would like to serve K users simultaneously. Each user (transmitter) transmits data to the company’s base station (receiver) in the form of bits (0’s and 1’s). By modulating electromagnetic waves of different frequencies, each user’s data can be transmitted on a fixed set of “frequency slots” approved the govern...

In this paper, we investigate the degradation of speaker identification performance due to speech coding algorithms used in digital telephone networks, cellular telephony, and voice over IP. By analyzing the difference between front-end feature vectors derived from coded and uncoded speech in terms of spectral distortion, we are able to quantify this coding degradation. This leads to two novel ...

The cellular telephone success story prompts the wireless communications community to turn its attention to other information services, many of them in the category of "wireless data" communications. One lesson of cellular telephone network operation is that effective power control is essential to promote system quality and efficiency. In recent we have applied microeconomic theories to power c...

Tokyo, September 1, 2011 --Hitachi, Ltd. (NYSE: HIT/TSE: 6501, hereafter, Hitachi) today announced the development of technology to increase the reliability of remote monitoring systems using cellular mobile telephone networks to wirelessly transmit data collected from sensor terminal measuring the status equipment in factories and buildings to monitoring center. This technology reduces the arr...

Several groups of investigators have assessed the impact of electromagnetic fields(EMF) on sleep and its disorders, waking electroencephalography (EEG), and theneuroendocrine system. These studies evaluated the effects of both mobile and non-mobile telephone EMF exposure in humans and animals. The results of these studies aresummarized and discussed in this article. 1. Mobile Te...

machine-part family formation is one of major applications of group technology (gt). the machine cell formation problem in cellular manufacturing system (cms) involves the decomposition of the manufacturing system into machine cells. part families are identified such that they are fully processed within a machine cell. the problem of cell design is a very complex task with wide ranging implicat...