نتایج جستجو برای: semi conductor dosimeter

تعداد نتایج: 150692  

Journal: :iranian journal of medical physics 0
hamidreza shabani m.sc. student of medical physics, department of medical physics, tehran university of medical sciences, tehran, iran mahmood allahverdi associated professor, medical physics dept., tehran university of medical sciences, and radiotherapy physics dept., of the cancer institute, tehran, iran mahbod esfahani physisist of the radiotherapy physics department of the cancer institute, tehran, iran mehdi aghili associate professor, radiotherapy and oncology department of the cancer institute, imam khomeini hospital, tehran, iran abbas takavar professor, medical physics dept., tehran university of medical sciences, tehran, iran mohammd reza taghizade m.sc. of medical physics, imam khomeini medical imaging center, gilan university of medical sciences, some’e-sara, iran

introduction: delivering maximum dose to tumor and minimum dose to normal tissues is the most important goal in radiotherapy. according to icru, the maximum acceptable uncertainty in the delivered dose compared to the prescribed dose should be lower than 5%, and this is because of the relationship between absorbed dose, tumor control and normal tissue damage. absorbed dose accuracy is investiga...

Journal: :Journal of Number Theory 2004

2006
Patrick Leteinturier

The automotive electronics has been introduced with multiple waves over the time: powertrain, safety & vehicle dynamic, body & convenience, telematics. The future is already knocking at the door and revolutionary systems are currently developed: X-by-wire, E-safety, Hybrid vehicle. The increasing requirements for fuel economy, safety, emission reduction, and onboard diagnosis push the automotiv...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2009
fatemeh yazdian seyed abbas shojaosadati mohsen nosrati mahdi pesaran hajiabbas khosro malek khosravi

a dissolved methane sensor based on silicone tube was designed, constructed and optimized.the silicone tube diameter, silicone tube length and helium flow rate (as the carrier gas(were considered as process parameters to be optimized.a continuous stream of helium (50 ml/min) was directed through the tubing, sweeping out the dissolved methane which diffused through the walls of the tubing from t...

Journal: :Journal of The Japan Society of Electrical Machining Engineers 1968

2010
Andrew J. Davenport

We present a maintenance scheduling problem arising from semi-conductor manufacturing which is characterized by low resource contention and multiple complex objectives and preferences. Since semi-conductor manufacturing involves a very high degree of uncertainty at the level of detailed operations, such as machine availability, yield, and processing times, generating a maintenance schedule whic...

2012

In Part I of the present work the theory of ionic adsorption was developed. In the present paper, the theory of the catalytic activity of semi-conductors is extended on the basis of the previous conclusions as to the ionic adsorption of gases. By introducing the concept of a "virtual atmosphere", a guiding principle for the selection of catalysts is obtained. The law of the virtual atmosphere h...

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