Eighty-nine consecutive patients with suspected intracranial masses were examined by auscultatory percussion in a blind study to assess the sensitivity of the procedure. Each patient underwent computed tomography (CT) of the brain as part of his medical care, and the results were compared with those of auscultatory percussion. Fifty-one of the patients had abnormal CT scans, of whom 44 (86%) ha...

The large load and poor heat dissipation of moon rock core drilling leads to the difficulty breaking low sampling efficiency. As a new auxiliary method, laser is expected be applied perturbation in lunar drilling. Revealing fracture characteristics mechanism under irradiation an important basis for realizing laser-assisted sampling. Basalt was used as simulated sample, its mechanical response w...

NIOSH continues to conduct respirable dust control research for surface mine blasthole drilling operations. Research areas have included testing variables (shroud leakage area, drill deck cross-sectional area, shroud height, collector-to-bailing airflow ratio, etc.) that have the most impact on respirable dust control, development of a dust collector inlet hood, development of a dust collector ...

The direct method of chest percussion, first described by Auenbrugger but disseminated by Corvisart, has rapidly been replaced by the indirect or digitodigital method. Chest percussion has not been evaluated by modern acoustic means, so that our present knowledge of the method does not consistently differ from the 19th century approach. Auscultatory percussion is not superior to conventional pe...

The genetic status of oocytes can be determined by polar body (PB) analysis. Following PB extraction, a genetic evaluation is performed. As each PB contains the complementary genetic material of the oocyte, PB analysis reveals information about its genetic status. Genetically altered oocytes may then be excluded from in vitro fertilization. The aim of our study was to evaluate laser microdissec...

Many reasons exist for companies to use quasicontinuous wave (QCW) fi ber lasers, including the fact that a fi ber laser combines the drilling and welding advantages of a pulsed Nd:YAG laser with the cutting capabilities of a CO2 laser. This combination of processing performance is not possible with the older technology, so in the past many companies owned both CO2 and Nd:YAG lasers to handle a...