نتایج جستجو برای: red brick

تعداد نتایج: 154444  

2002
K. Ghosh

We consider the thermodynamics of minimally coupled massive scalar field in 3+1 dimensional Taub-NUT background. The brick wall model of 't Hooft is used. When Schwarzschild like coordinates are used it is found that the usual radial brick wall cutoff parameter is required to regularize the solution. Free energy of the scalar field is obtained through explicit counting of states. It is found th...

Journal: :Scientific American 1906

Journal: :Journal of the Franklin Institute 1876

Journal: :Radiation protection dosimetry 2013
G Xhixha A Ahmeti G P Bezzon M Bitri C Broggini G P Buso A Caciolli I Callegari F Cfarku T Colonna G Fiorentini E Guastaldi F Mantovani G Massa R Menegazzo L Mou D Prifti C Rossi Alvarez Dh Sadiraj Kuqi M Shyti L Tushe M Xhixha Kaçeli A Zyfi

This study focuses on the radiological characterisation of building materials manufactured in Albania by using a high-resolution gamma-ray spectrometer. The average activity concentrations of (40)K, (226)Ra and (232)Th were, respectively, 644.1±64.2, 33.4 ± 6.4 and 42.2 ± 7.6 Bq kg(-1) in the clay brick samples and 179.7 ± 48.9, 55.0 ± 5.8 and 17.0 ± 3.3 Bq kg(-1) in the cement samples. The cal...

Journal: :Journal of hazardous materials 2009
Hai-rong Li Qing-bin Liu Wu-yi Wang Lin-sheng Yang Yong-hua Li Fu-jian Feng Xiao-yu Zhao Kun Hou Ge Wang

The objective of this study was to detect the fluoride level in the drinking water and the urine of habitants aged 16-55 years living in Inner Mongolia China. Furthermore, fluoride concentration of the brick tea infusion samples which were drunk by Mongolia herdsmen in everyday life living in SumuErga village of Ejin Horo Banner, Inner Mongolia China was also determined. A total of 117 particip...

1998
Won Tae Kim

We calculate the statistical entropy of a scalar field on the background of three-dimensional De Sitter space in terms of the brick wall method and finally derive the perimeter law of the entropy. ∗Electronic address: [email protected] 1 Entropy of black holes has an universal area law [1] and the entropy of the well-known Schwarzschild black hole satisfies the area law by means of thermal...

2008
Mohammed O. Ramadan Hanan A. Fouad Ahmed M. Hassanain

A large quantity of sludge is generated each year from water treatment plants in Egypt. Disposing the sludge to the nearest water stream is the common practice in Egypt, which accumulatively rise the aluminum concentrations in water and consequently in human bodies. This practice has been linked to occurrence of Alzheimer’s disease. Landfill disposal of the sludge is impractical because of the ...

2012
Shiraz Shaikh Asaad Ahmed Nafees Vikash Khetpal Abid Ali Jamali Abdul Manan Arain Akram Yousuf

BACKGROUND Occupational risk factors are one of the major causes of respiratory illnesses and symptoms, and account for 13% of chronic obstructive pulmonary disease and 11% of asthma worldwide. Majority of brick kilns in Pakistan use wood and coal for baking the bricks which makes the brick kiln workers susceptible to high exposure of air pollution. This study was designed to describe frequency...

Journal: :Disability Studies Quarterly 2006

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