In this paper, we present the development of a method to accurately measure the positive and negative charge distribution of nanosized aerosols using a tandem differential mobility analyzer (TDMA) system. From the series of TDMA measurements, the charge fraction of nanosized aerosol particles was obtained as a function of equivalent mobility particle diameter ranging from 50 to 200 nm. The capa...

powders at millimeter waves Konstantin A. Korolev, John S. McCloy, and Mohammed N. Afsar Department of Electrical and Computer Engineering, Tufts University 161 College Avenue, Medford, Massachusetts 02155, USA Extremely High Frequency Medical and Technical Association 11-7 Mokhovaya Street, Moscow 125009, Russia Glass and Materials Science Team, Pacific Northwest National Laboratory, Richland,...

osteopenia of prematurity (oop) is a preventable disease. improved survival of premature newborns is associated with an increased incidence of oop. the purpose of this study was to compare the prophylactic effects of two low doses of vitamin d (200 and 400 iu/day) on the clinical, biochemical and radiological indices of the rickets of prematurity. in a randomized clinical trial, 60 preterm newb...

background: radiology staff needs to justify the radiation exposures in order to protect themselves and others from radiation risks. the aims of this study were to examine the awareness level of radiation dose and protection amongst radiographers and to compare their performance between major jordanian hospitals. materials and methods: a cross-sectional survey was conducted in 4 major jordanian...

background: the natural radionuclides are always present in soil and care needs to be taken to minimize the radiation dose to humans. these radionuclides are mostly gamma ray emitting radionuclides which contribute to the radiation dose in long term behavior of radionuclides in soil. health hazards associated with natural radioactivity are of great concern and it is necessary to assess risk due...

background:  this study presents patient specific and organ dose estimation in computed tomography (ct) imaging of thorax directly from patient ct image using monte carlo simulation.  patient's ct image is considered as the patient specific phantom and the best representative of patient physical index in order to calculate specific organ dose. materials and methods: egsnrc /beamnrc monte c...

objective: acute inflammatory demyelinating peripheral neuropathy (guillain-barre-syndrome) is by far the most common cause of immune-medicated peripheral nervous system disease in children; with the near disappearance of poliomyelitis, gbs is responsible for the great majority of cases of acute flaccid paralysis. so far, in several controlled studies, corticosteroids, plasmapheresis and ivig h...

Introduction: The functionalized Multi-Walled Carbon Nanotube with hydroxyl group (MWCNT-OH) due to high aspect ratios (length to diameter), and also excellent mechanical, electrical and thermal characteristics, has great potential applications in flexible electronics, solar cells, antistatic devices, electromagnetic interference shielding, radiation shielding, electrode materi...

Aim: To investigate the structural changes in SiO2 (silicon dioxide) layer, which is sensitive region of RadFET radiation sensors used medical field, and to elaborate impacts these modifications on electrical characteristics. Methods: Dry oxidation method was grow film n-type Si (100) MOS capacitors were produced by using DC magnetron sputtering. Irradiation carried out a 60Co radioactive sourc...

Abstract Jatropha curcas (JC) is a highly effective conditioner in dewatering fecal sludge (FS); however, there are limited studies on the model predicting its optimal dose. This study presents results of developed for JC doses. The assessed FS parameters and stock solution. We analyzed samples from mixture pit latrine septic tank at water quality laboratory University Dar es Salaam. multiple l...