排序方式: 共有29条查询结果,搜索用时 15 毫秒
1.
Fan L Fallahi M Hader J Zakharian AR Moloney JV Murray JT Bedford R Stolz W Koch SW 《Optics letters》2006,31(24):3612-3614
We propose an efficient coherent power scaling scheme, the multichip vertical-external-cavity surface-emitting laser (VECSEL), in which the waste heat generated in the active region is distributed on multi-VECSEL chips such that the pump level at the thermal rollover is significantly increased. The advantages of this laser are discussed, and the development and demonstration of a two-chip VECSEL operating around 970 nm with over 19 W of output power is presented. 相似文献
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Hader A. Elgendy 《代数通讯》2019,47(7):2798-2809
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The Bethe ansatz leads to Yang-Yang integral equations. The particle-hole structure of the zero-temperature excitations is generalized to finite temperatures, which leads to the definition of soliton- and phonon-quasiparticles. The solitons approximately follow the Fermi-Dirac statistics and have a chemical potential with an unusual temperature dependence, because the number of solitons is not constant. 相似文献
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–The effect of solar radiation on development was studied in two strains (wild type N04 and axenic AX2) of the cellular slime mold, Dictyostelium discoideum. In both strains early development was retarded by solar radiation and amoebae exposed for >200 min never developed into mature sorocarps. Overheating can be excluded as a mechanism for inhibition since the organisms were exposed in a temperature-controlled growth chamber. The most effective component seems to be UV-B radiation (while UV-A has a smaller inhibitory effect) as shown by cutting off shorter wavelength radiation using WG filters. 相似文献
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Cyclic and Lasso Peptides: Sequence Determination,Topology Analysis,and Rotaxane Formation 下载免费PDF全文
Hader E. Elashal Ryan D. Cohen Heidi E. Elashal Dr. Chuhan Zong Prof. Dr. A. James Link Prof. Dr. Monika Raj 《Angewandte Chemie (International ed. in English)》2018,57(21):6150-6154
A broadly applicable chemical cleavage methodology to facilitate MS/MS sequencing was developed for macrocyclic and lasso peptides, which hold promise as exciting new therapeutics. Existing methods such as Edman degradation, CNBr cleavage, and enzymatic digestion are either limited in scope or completely fail in cleavage of constrained nonribosomal peptides. Importantly, the new method was utilized for synthesizing a unique peptide‐based rotaxane (both cyclic and threaded) from the lasso peptide, benenodin‐1 ΔC5. 相似文献
6.
Hader A. Elgendy 《代数通讯》2018,46(9):3840-3864
We extend the notion of compatibility of tripotents in a Jordan triple system to that of quadripotents in a Jordan quadruple system and get a criterion for compatibility of quadripotents in a Jordan quadruple system. 相似文献
7.
Ahmed Hader Imad Achik Khalid Sbiaai Lahcen El Arroum Yahia Boughaleb 《Optical and Quantum Electronics》2014,46(1):57-63
We aimed in this work to study numerically the scaling behavior and the mound morphological properties of the interfaces generated by the multilayer deposition process. We have found that when the diffusion process dominates strongly the deposition one, the obtained interfaces consist of wedding-cake like structures. The width of the surface is a self-affine fractal exhibiting non-trivial scaling with the surface height and the system size, and the obtained interfaces follow the Family–Vicsek law with exponent values more consisting with the Edwards–Wilkinson model. 相似文献
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The effects of radiative losses on the thermal behavior of thin metal films, as described by the microscopic two-step hyperbolic heat conduction model, are investigated. Different criteria, which determine the ranges within which thermal radiative losses are significant, are derived. It is found that radiative losses from the electron gas are significant in thin films having [(CR ee4/3 T¥ 4 )/(ke1/3 L2/3 G)] 3 4.6 ×107{{C_R \epsilon _e^{{4 \over 3}} T_\infty ^4 } \over {k_e^{{1 \over 3}} L^{{2 \over 3}} G}}\geq 4.6 \times 10^7 for /o > 4 and FF < 1 and [(CR ee3/2 T¥ 9/2)/(ke1/2 L1/2 G)] 3 7.4 ×1010{{C_R \epsilon _e^{{3 \over 2}} T_\infty ^{{9 \over 2}}} \over {k_e^{{1 \over 2}} L^{{1 \over 2}} G}}\geq 7.4 \times 10^{10} for /o < 4 and FF > 1. 相似文献