Background noise is present in many telephone calls and may influence the perceived overall quality of a connection quite significant. Different conversation situations have to be distinguished: Background noise may influence the transmission quality during periods where no speech signal is present, during periods with near end speech and with far end speech. Various analysis procedures are int...

Noise pollution is one of the most serious quality-of-life issues in urban environments. In New York City (NYC), for example, more than 80% of complaints1 registered with NYC’s 311 phone line2 are noise complaints. Noise is not just a nuisance to city dwellers as its negative implications go far beyond the issue of quality-of-life; it contributes to cardiovascular disease, cognitive impairment,...

The properties of HBTs, HEMTs, PHEMTs and MESFETs are reviewed and discussed in the context of their suitability for various applications. Noise, power and high frequency performance is reviewed and the physical mechanisms dictating their values are discussed. The reliability characteristics of the devices are discussed and system applications are reported.

This study presents data for the joint angles of isocomfort (JAI) in sitting and standing males based on perceived comfort ratings for static joint postures maintained for 60 s. The JAI value was defined as a boundary indicating joint deviation (an angle) from neutral posture, within which the perceived comfort for different body joint postures is expected to be the same. An experiment for quan...

conclusions it seems that to achieve the patients' comfort during the hemodialysis procedure, the health care teams, hospitals in charge and the patients themselves have to do their best to provide the patients' comfort. results three themes emerged: the presence of competent nurses, the delightful presence of the others, and coping with comfort obstacles. each theme consisted of some categorie...

PURPOSE To investigate whether carrying out various interventions part way through the day influences comfort in symptomatic daily disposable (DD) contact lens wearers. METHODS A subject-masked, randomized, controlled clinical trial was conducted in thirty symptomatic soft lens wearers who wore their habitual DD contact lenses bilaterally for 12 h on two separate days. Five hours after lens a...

A great number of factors affect the uncomfortable of seats. Apart from external appearance, the most important is the comfort for users in designing an un-adjustable seat. A system or suggested principles which assist designers in designing the comfort of the seats to testees will benefit waist of users, and hence prevent them from potential discomfort and injuries. This study attempts to deve...

threats are one of the most fundamental problems of our modern societies that daily will affect citizens in urban spaces. this becomes more problematic when the people in their everyday living spaces encounter with behaviors that cause lack of security and should have been feel comfort and their families used these spaces freely. this causes many problems for citizens. in today cities because o...