Real{time systems are de ned as those systems in which the correctness of the system depends not only on the logical result of computation, but also on the time at which the results are produced. Real-time systems span a broad spectrum of complexity from very simple microcontrollers (such as a microprocessor controlling an automobile engine) to highly sophisticated, complex and distributed syst...

Emissions of airborne particulate matter are a major cause air pollution. A numerical approach was used to establish single-filter-bag cleaning model based on the discrete phase particle deposition distribution law study effect pulse backflushing operation parameters performance specific structure dust collector. It found that increasing blowing pressure (0.2 MPa 0.6 MPa) and extending width (0...

Crandall et al. (1) used a matched-pair case-control study design to estimate the effects of air bags and seat belts on the mortality of drivers involved in traffic crashes. The authors defined a case as a driver who died and a control as a driver who lived. The matched pairs were the drivers in two passenger cars that collided head-on in the United States. The authors claimed that they were ab...

In spring, with the appearance of new foliage, the aromatic content of the air as measured with the gas chromatograph does not increase much, and the air is essentially free of terpenes such as a-pinene. Even when plastic bags are put around young shoots of Aster, no terpenes are detectable inside the bag until the leaves are crushed, when large amounts of terpenes are immediately released. Soo...

Air pollutants have been documented to be associated with a wide variety of adverse health impacts in children. These include increases in mortality in very severe episodes; an increased risk of perineonatal mortality in regions of higher pollution, and an increased general rate of mortality in children; increased acute respiratory disease morbidity; aggravation of asthma, as shown by increased...

Only 35.7% of the bowel injuries occurred during CO2 laparoscopy is noticeable intra-operatively. Although air insufflations into the rectum is suggested to identify this injuries, increased risk of contamination of the abdominal cavity by bowel contents makes this procedure abolished. In this experimental study we aimed to evaluate the role of rectal catheterization in the diagnosis of small o...

Unsafe water, sanitation and hygiene together with deficient nutritional status are major contributors to the global burden of disease. Safe collection, disposal and reuse of human excreta would enable the risk of transmission of diseases to be decreased and household food security to be increased in many regions. However, the majority of the 2.5 billion people lacking improved sanitation compr...