نتایج جستجو برای: Phenomenological foam model

تعداد نتایج: 2130978  

Journal: :Strojnícky casopis – Journal of Mechanical Engineering 2015

2013
Olivier Doutres Noureddine Atalla Kevin Dong

This paper proposes simple semi-phenomenological models to predict the sound absorption efficiency of highly porous polyurethane foams from microstructure characterization. In a previous paper [J. Appl. Phys. 110, 064901 (2011)], the authors presented a 3-parameter semi-phenomenological model linking the microstructure properties of fully and partially reticulated isotropic polyurethane foams (...

M Abu-Ayyad M.F Alzoubi, S Al-Hallaj

Flexible Polyurethane (PU) foam samples with different densities and chemical formulations were tested in quasi-static stress-strain compression tests. The compression tests were performed using the Lloyd LR5K Plus instrument at fixed compression strain rate of 0.033 s-1 and samples were compressed up to 70% compression strains. All foam samples were tested in the foam rise direction and their ...

2013
F. P. Zhao Q. An B. Li H. A. Wu W. A. Goddard S. N. Luo

Related Articles Elastic superlattices with simultaneously negative effective mass density and shear modulus J. Appl. Phys. 113, 093508 (2013) Identifying local characteristic lengths governing sound wave properties in solid foams J. Appl. Phys. 113, 084905 (2013) A semi-phenomenological model to predict the acoustic behavior of fully and partially reticulated polyurethane foams J. Appl. Phys. ...

2013
O. Dazel J.-P. Groby B. Brouard C. Potel

Related Articles Method of extreme surfaces for optimizing geometry of acousto-optic interactions in crystalline materials: Example of LiNbO3 crystals J. Appl. Phys. 113, 083103 (2013) Photothermal model fitting in the complex plane for thermal properties determination in solids Rev. Sci. Instrum. 84, 024903 (2013) Transient lattice distortion induced by ultrashort heat pulse propagation throug...

Journal: :iranian journal of pharmaceutical research 0
a jouyban hk chan m khoubnasabjafari

the phenomenological model of khossravi and connors (1992) has been adopted to calculate the electrophoretic mobility of drugs at different concentrations of solvents in a binary mixture. the accuracy and predictability of the model have been evaluated employing 14 experimental data sets by using average percentage mean deviation (apmd). the obtained apmd for correlative and predictive studies ...

2001
Giovanni AMELINO-CAMELIA

I propose a phenomenological description of space-time foam and discuss the experimental limits that are within reach of forthcoming experiments.

2001
Giovanni Amelino-Camelia

The expectation that it should not be possible to gain experimental insight on the structure of space-time at Planckian distance scales has been recently challenged by several studies. With respect to space-time fluctuations, one of the conjectured features of quantum-gravity foam, the experiments that have the best sensitivity are the ones which were originally devised for searches of the clas...

Journal: :iranian biomedical journal 0
حسن پیپل زاده mohammad hassan pipelzadeh عبدالرحمان دزفولیان abdulrahman dezfulian محمد هادی کوچک mohammad hadi koocheck مهرداد مرادی mehrdad moradi

the aim of the present study was to clarify if old n-mri rat, a strain which is easily available in iran and cheap to maintain, is a suitable alternative to those previously reported. in this model, we compared three quantifiable parameters between old and young rats: biochemically, involving measurement of differences in the lipid profile. histologically, the differences of the thickness of th...

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