نتایج جستجو برای: thermal damage

تعداد نتایج: 439025  

2015
F. Hofmann D. R. Mason J. K. Eliason A. A. Maznev K. A. Nelson S. L. Dudarev

Knowledge of mechanical and physical property evolution due to irradiation damage is essential for the development of future fission and fusion reactors. Ion-irradiation provides an excellent proxy for studying irradiation damage, allowing high damage doses without sample activation. Limited ion-penetration-depth means that only few-micron-thick damaged layers are produced. Substantial effort h...

Journal: :Journal of biomedical optics 2012
Hyun Soo Lim

General application of continuous-wave (CW) laser irradiation modes in photodynamic therapy can cause thermal damage to normal tissues in addition to tumors. A new photodynamic laser therapy system using a pulse irradiation mode was optimized to reduce nonspecific thermal damage. In in vitro tissue specimens, tissue energy deposition rates were measured in three irradiation modes, CW, pulse, an...

2014
Huan Huang Lih-Mei Yang Jian Liu

Micro-hole drilling and cutting in ambient air are presented by using a femtosecond fiber laser. At first, the micro-hole drilling was investigated in both transparent (glasses) and nontransparent (metals and tissues) materials. The shape and morphology of the holes were characterized and evaluated with optical and scanning electron microscopy. Debris-free micro-holes with good roundness and no...

Journal: :Journal of the Japan Institute of Metals and Materials 1994

1998
Michael D. Seale Barry T. Smith W. H. Prosser

Among the various techniques available, ultrasonic Lamb waves offer a convenient method of evaluating composite materials. Since the Lamb wave velocity depends on the elastic properties of a structure, an effective tool exists to monitor damage in composites by measuring the velocity of these waves. Lamb wave measurements can propagate over long distances and are sensitive to the desired in-pla...

2014
Dimitrios K. Filippiadis Sean Tutton Argyro Mazioti Alexis Kelekis

BACKGROUND Primary or metastatic osseous and soft tissue lesions can be treated by ablation techniques. METHODS These techniques are classified into chemical ablation (including ethanol or acetic acid injection) and thermal ablation (including laser, radiofrequency, microwave, cryoablation, radiofrequency ionisation and MR-guided HIFU). Ablation can be performed either alone or in combination...

Journal: :پژوهش های جغرافیای طبیعی 0
حسین محمدی دانشیار دانشکده جغرافیای دانشگاه تهران علی اصغر زینانلو استادیار موسسه تحقیقات اصلاح و تهیه نهال و بذر علی اصغر روشن دانشجوی دکتری اقلیم شناسی دانشگاه تهران و عضو هیات علمی دانشگاه امام حسین(ع) تهران

abstract temperature is the most important environmental factor that affects flowering and fruiting. the temperatures induce reproduction and cause damaging to tree or its crop.this paper analyzed daily minimum temperatures 0.0oc, and maximum temperatures 12.5 oc from october 1 to may 31 at nine sites in olive producing and cultivating regions, and one control station, using thermal adaptabilit...

2010
E. Surdutovich A. V. Yakubovich A. V. Solov'yov

We present the latest advances of the multiscale approach to radiation damage caused by irradiation of a tissue with energetic ions and report the most recent advances in the calculations of complex DNA damage and the effects of thermal spikes on biomolecules. The multiscale approach aims to quantify the most important physical, chemical, and biological phenomena taking place during and followi...

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