Previous studies on nonwovens used for respiratory protective devices (RPDs) were related to equipment intended for short-term use. There is only limited research on the development of biocidal nonwoven fabrics for reusable RPDs that could be used safely in an industrial work environment where there is a risk of microbial growth. Moreover, a new group of biocides with high antimicrobial activit...

Nowadays, local flap coverage methods, including the C-V breast flap compose the majority of nipple reconstruction procedures [1]. As the projection of new nipple from the C-V breast flap is basically subcutaneous fat, the reconstructed nipple tends to be flattened over the long term, especially if submitted to pressure. In addition, necrosis or abrasion may result in flap failure. For this rea...

As the 750kV substation has the characteristics like incomplete information, uncertain diagnosis result and dual protection configuration, a fault diagnosis method of substation with redundant protection configuration based on rough sets and grey relational analysis is proposed. In this method, the diagnosis decision table which takes advantage of information about wave-recording devices and tw...

The CDC reported the results of two surveys of US hospitals conducted in 1992 and 1996 to determine the degree of implementation of the “CDC Guidelines for Preventing the Transmission of Mycobacterium tuberculosis at US Hospitals.” The 1992 survey included all public (city, county, Veterans’ Administration), and primary medical school-affiliated US hospitals (n=632) and a 20% random sample of a...

BACKGROUND Outbreaks of tuberculosis (TB) in hospitals have occurred when the Centers for Disease Control and Prevention (CDC) guideline recommendations for preventing the transmission of Mycobacterium tuberculosis were not fully implemented. OBJECTIVE To determine whether US hospitals are making progress in implementing the CDC guidelines for preventing TB. METHODS In 1992, we surveyed all...

UNLABELLED Carbon dioxide (CO2) rebreathing has been recognised as a concern regarding respirator use and is related to symptoms of discomfort, fatigue, dizziness, headache, muscular weakness and drowsiness. Previous investigations are limited by small sample size and have not evaluated the relationship between CO2 inhalation and phonic respiration (breathing during speech) in respiratory prote...