نتایج جستجو برای: air correction

تعداد نتایج: 368892  

2012
Andréanne Morin Jeffrey R. Brook Caroline Duchaine Catherine Laprise

Eight candidate genes selected in this study were previously associated with gene-environment interactions in asthma in an urban area. These genes were analyzed in a familial collection from a founder and remote population (Saguenay-Lac-Saint-Jean; SLSJ) located in an area with low air levels of ozone but with localized areas of relatively high air pollutant levels, such as sulphur dioxide, whe...

Ali Bidari Hassan Amiri Masoumeh Emamverdy Nilofar Ghodrati Samad Shams Vahdati, Tayeb Ramim

Objective: There are many communities at risk by a series of air pollution episodes. Tehran is one of the most polluted cities in the world. The presence of one or more air pollutants with a certain concentration in a particular period of time can cause several adverse effects on human and animals’ well-being that can cause much morbidity. There are several pollutants in the ai...

Journal: :journal of emergency practice and trauma 0
hassan amiri emergency department, iran university of medical sciences, tehran, iran ali bidari emergency department, iran university of medical sciences, tehran, iran samad shams vahdati road traffic injury research center, tabriz university of medical sciences, tabriz, iran nilofar ghodrati department of hematology oncology, alborz university of medical sciences, karaj, iran tayeb ramim sina trauma and surgery research center, tehran university of medical sciences, tehran, iran masoumeh emamverdy road traffic injury research center, tabriz university of medical sciences, tabriz, iran

objective: there are many communities at risk by a series of air pollution episodes. tehran is one of the most polluted cities in the world. the presence of one or more air pollutants with a certain concentration in a particular period of time can cause several adverse effects on human and animals’ well-being that can cause much morbidity. there are several pollutants in the air but some of the...

2017
Florian Büther Benjamin Noto Katharina Auf der Springe Thomas Allkemper Lars Stegger

Background: Attenuation correction is one of the most important steps in producing quantitative PET image data. In hybrid PET-MRI systems, this correction is far from trivial, as MRI data are not correlated to PET attenuation properties of the scanned object. Commercially available systems often employ correction schemes based on segmenting the body into different tissue classes (air, lung tiss...

Journal: :Remote Sensing 2016
Azusa Ishizaki Yukihisa Sanada Airi Mori Mitsuo Imura Mutsushi Ishida Masahiro Munakata

In aerial radiation monitoring (ARM), the air dose rate cannot be appropriately estimated under snowy conditions due to attenuation of gamma rays by the snow layer. A technique to address this issue is required for ARM to obtain enough signals for air dose rates. To develop this technique, we investigated the relationship between snow depth and ARM measurement results using ARM, laser imaging d...

2014

1. Richardson ET, Morrow CD, Kalil DB, Bekker L-G, Wood R (2014) Shared Air: A Renewed Focus on Ventilation for the Prevention of Tuberculosis Transmission. PLoS ONE 9(5): e96334. doi:10.1371/journal.pone.0096334 2. The PLOS ONE Staff (2014) Correction: Shared air: A renewed focus on ventilation for the prevention of tuberculosis transmission. PLoS ONE 9(8): e106216. doi:10.1371/journal.pone.01...

2005
Tadahiro Kurosawa Nobuhisa Takata

Correction factors for the contribution of X-rays transmitted through the diaphragm of a free-air ionization chamber and those scattered from the surface of the diagram aperture are obtained by Monte Carlo simulation for two free-air ionization chambers for various diaphragm aperture sizes, X-ray energies, and source to chamber distances. The dependences of these contributions on conditions are...

Journal: :iranian journal of radiation research 0
a. mostaar medical physics department, tehran university of medical sciences, tehran, iran m. allahverdi department of radiotherapy physics, cancer institute, tehran, iran m. shahriari gamma irradiation center, atomic energy organization of iran, tehran, iran

background: in treating patients with radiation, the degree of accuracy for the delivery of tumor dose is recommended to be within ± 5% by icru in report 24. the experimental studies have shown that the presence of low-density inhomogeneity in areas such as the lung can lead to a greater than 30% change in the water dose data. therefore, inhomogeneity corrections should be used in treatment pla...

2007
R. H. Menk

A dosimetric procedure to assure the traceability to the air-kerma standard of the measurements performed in synchrotron radiation beams, was implemented at the “Istituto Nazionale di Metrologia delle Radiazioni Ionizzanti” of ENEA (INMRI-ENEA). To this purpose, absolute air-kerma measurements by the ENEA standard free-air chamber for low energy x-rays have been performed at the SYRMEP (SYnchro...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز - دانشکده ادبیات و زبانهای خارجی 1391

abstract this study investigates the teachers’ correction of students’ spoken errors of linguistic forms in efl classes, aiming at (a) examining the relationship between the learners’ proficiency level and the provision of corrective feedback types, (b) exploring the extent to which teachers’ use of different corrective feedback types is related to the immediate types of context in which err...

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