نتایج جستجو برای: thermal radiation

تعداد نتایج: 443055  

2013
Yomna Abdelrahman Anja Mebus

Thermal camera operating in Far Infrared (FIR) is considered to be underexplored in fields other than security and law enforcement. Nevertheless, recently it drawn the attention of Human Computer Interaction (HCI) researchers as a new sensory system enabling novel interactive systems. They are robust to illumination changes and using it with well-known computer vision techniques, the complexity...

ژورنال: سنجش و ایمنی پرتو 2019

This research aimed to measure the received photon and thermal neutron doses to contralateral breast (CB) surface in breast cancer radiation therapy for different field sizes in presence of dynamic and physical wedges. The photon and thermal neutron doses were measured by thermo uminescent dosimeter (TLDs) chips for 11 × 13, 11 × 17 and 11 × 21 cm2 field sizes in presence of physical and dynamic ...

2004
M. Vollmer S. Henke

Thermal reflections are a common source of problems in interpreting infrared (IR) thermal images. In particular, atomically smooth surfaces like glass, metals, or wet surfaces, and also brick and concrete, may easily give rise to reflections of infrared radiation from often uncared sources. If unnoticed, these thermal reflections may give rise to misinterpretations of the object temperature. Af...

2006
C. DE MICCO C. M. ALDAO

− The radiative contribution to thermal conductivity in plastic foams is studied through two different approaches. Both consist in close forms derived from the heat transfer equation governing the intensity of radiation in foams, where scattering can be treated as isotropic. While one approach is based on the solution of the equation for a continuous medium, the other one is based in the soluti...

2006
Timothy H. Boyer

It is suggested that an understanding of blackbody radiation within classical physics requires the presence of classical electromagnetic zero-point radiation, the restriction to relativistic (Coulomb) scattering systems, and the use of discrete charge. The contrasting scaling properties of nonrelativistic classical mechanics and classical electrodynamics are noted, and it is emphasized that the...

2015
Ahmad Fudholi Kamaruzzaman Sopian Mohammad H. Yazdi Mohd Hafidz Ruslan Adnan Ibrahim Hussein A. Kazem

The electrical and thermal performances of photovoltaic thermal (PVT) water collectors were determined under 500–800 W/m solar radiation levels. At each solar radiation level, mass flow rates ranging from 0.011 kg/s to 0.041 kg/s were introduced. The PVT collectors were tested with respect to PV efficiency, thermal efficiency, and a combination of both (PVT efficiency). The results show that th...

Journal: :Seminars in oncology 2014
Mark Hurwitz Paul Stauffer

The compelling biologic basis for combining hyperthermia with modern cancer therapies including radiation and chemotherapy was first appreciated nearly half a century ago. Hyperthermia complements radiation as conditions contributing to radio-resistance generally enhance sensitivity to heat and sensitizing effects occur through increased perfusion/tumor oxygenation and alteration of cellular de...

Journal: :Entropy 2017
Payam Hooshmand Hamed Rajabzadeh Gatabi Navid Bagheri Isma'il Pirzadeh Ashkan Hesabi Mohamad Yaghoub Abdollahzadeh Jamalabadi Majid Oveisi

Numerical investigation of the effects of magnetic field strength, thermal radiation, Joule heating, and viscous heating on a forced convective flow of a non-Newtonian, incompressible power law fluid in an axisymmetric stretching sheet with variable temperature wall is accomplished. The power law shear thinning viscosity-shear rate model for the anisotropic solutions and the Rosseland approxima...

2010

The solar reflectance and the thermal emittance of a roof surface are important surface properties affecting the roof temperature, which, in turn, drives the heat flow through the roof. The solar reflectance (p) determines the fraction of the solar radiation incident from all directions that is diffusely reflected by the surface. The thermal emittance (c) describes how well the surface radiates...

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