Materials Literature
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The alpha emission rate from some older americium-241 school cup sources, detected by a GM tube, appears much lower than when the sources were new. Strangely, the sources perform as expected when used with spark counters and ionisation chambers. This apparent reduction of emission rate adversely affects the demonstrat…
This paper experimentally reports the effect of suspension stability on the thermal conductivity of water-based Au nanofluids. For this purpose, the water-based Au nanofluids are prepared by the one-step method called electro-chemical method with volume fraction of 0.0005%. The thermal conductivity of water-based Au n…
El ajuste de la produccion de energia electrica al ritmo al cual se consume es uno de los principales retos que se plantea hoy dia. El consumo electrico experimenta diferentes picos a lo largo no solo de un dia, sino tambien del ano, asi por ejemplo podemos encontrar picos de consumo en verano a raiz de aparatos como…
In this work, two mixtures with equal concentrations of 1) 4ꞌ-(6-(4-(pentylamino) methyl)-3-hydroxyphenoxy) hexyloxy) biphenyl-4-carbonitrile+-4-((4-(hexyloxy) benzylidene) amino) phenyl 4-butoxy benzoate and 2) 4ꞌ - (6-(4-(hexylamino) methyl)-3-hydroxyphenoxy) hexyloxy) biphenyl-4-carbonitrile+-4-((4-(octyloxy) benzy…
To compare the performance of small intestinal submucosa (SIS)-covered endografts (SCEs) to bare nitinol stents (BSs) in injured swine iliac arteries.Twenty-eight nitinol stents were used: 14 externally SCEs and 14 BSs. Devices were implanted in each side of balloon-injured external iliac arteries of 14 swine via caro…
Many-body interactions are cornerstones of contemporary solid state physics research.\nEspecially, phonon related interactions such as phonon-phonon coupling, spin-phonon\ncoupling and electron-phonon coupling constantly present new challenges. To study\nphonon related many-body interactions, temperature dependent Ram…
Jerami merupakan salah satu limbah pertanian terbesar dan pemanfaatannya belum optimal.Kandungan serat selulosa yang cukup tinggi pada jerami dapat dimanfaatkan untuk campuran pembuatan kertas yang selama ini masih didominasi oleh penggunaan serat kayu.Seiring dengan semakin menipisnya persediaan serat kayu, diperluka…
On page 3580, J.-W. Liu, S.-H. Yu, and co-workers construct two different types of two types of binder/collector-free Te cathodes using a bifunctional and elastic carbon nanotube (CNT) aerogel and Te nanowires. Both cathodes have high specific capacity, fine cycling stability, and high-rate capability, showing excelle…
Heterogeneous catalysts have been developed for the conversion of biomass-derived synthetic gas (syngas) to ethanol. The objectives of this project were to develop a clean synthesis gas from biomass and develop robust catalysts with high selectivity and lifetime for C2 oxygenate production from biomass-derived syngas…
\nW artykule przedstawiono badania powłok aluminiowych naniesionych na poliamid 6 za pomocą niskociśnieniowej odmiany metody cold spray (LPSC). Porównano wpływ przygotowania powierzchni na przyczepność, mikrotwardość oraz mikrostrukturę powłok. Warstwy wytworzone na podłożach niepoddanych obróbce charakteryzowały się…
Two donor-acceptor alternating conjugated copolymers were synthesized as the donor materials of the active layer in polymer solar cells via Stille coupling reaction.Both copolymers consisted of dithienosilole as the donor unit and nonfluorinated 2,1,3-benzooxadiazole or fluorinated 2,1,3-benzooxadiazole as the accepto…
介绍了专利商UOP（环球油品公司）连续催化重整工艺——3 000 lb/h催化剂再生部分。以某在建的项目为例,对Cycle MaxⅠ、Cycle MaxⅡ两代催化剂再生技术设备台位数变化情况、框架内的设备立面布置情况、设备标高确定原则、框架标高、催化剂管线设置要求进行了说明与对比分析。阐述了Cycle MaxⅡ再生技术相比Cycle MaxⅠ再生技术的改进情况。对关键设备的定位、支撑方案及其之间管道的连接选用元件提出了建议和设计倾向。
Σκοπός της παρούσας μελέτης ήταν η διερεύνηση της επίδρασης της θερμοκρασίας παρασκευής των συμπλόκων αμυλόζης και συστημάτων αμύλου με διάφορα λιπαρά οξέα καθώς και η επίδραση του μήκους αλυσίδας και του βαθμού ακορεστότητας των φιλοξενούμενων μορίων στα δομικά χαρακτηριστικά, στις θερμικές ιδιότητες και στα μορφολογ…
In this paper, we present a computational method for rapidly designing GRadient-INdex (GRIN) lenses by employing a surrogate model that relates input lens parameters to output Zernike aberrations. This approach also provides a path forward for the designer to identify which lens parameters have the largest impact on s…
We propose a novel antenna design combining the simplicity of shielded Fabry-Perot leaky-wave antennas (FP-LWA) with the performance of antenna arrays. The device is based on a probe-fed shielded FP-LWA structure, with the standard partially-reflecting surface replaced by a metasurface. The cavity excitation is optimi…
This paper discusses and compares two approaches for the analysis of SW propagation on modulated impedance surfaces. The first one is an extension of geometrical optics (GO) description for plane waves in graded index materials to surface waves (SWs) supported by modulated, impenetrable, isotropic or anisotropic imped…
研究了1，3-丙二醇双子琥珀酸二异辛酯磺酸钠（GSS362）和月桂醇聚氧乙烯醚-7（AEO-7）的复配体系（GSS362／AEO-7）分别在水溶液和乙二醇／水混合溶剂中的表面性质和胶团化行为，并对理想混合胶团的临界胶束浓度、混合体系中各组分在表面吸附层和胶团中的组成、相互作用参数和热力学参数进行了分析计算。实验结果表明，复配物在水和乙二醇／水混合溶剂中均不存在协同效应，但AEO-7的加入明显降低了GSS362的临界胶束浓度，混合胶团的形成为自发过程，胶团中GSS362与AEO-7分子具有较弱的相互作用，表面吸附层和胶团中均富含非离子表面活性剂AEO-7；乙二醇的加入使体系的临界胶束浓度变大，且对GSS362影响较大，不利于GSS3…
Multiphysics modeling and simulation have a wide range of application in science and engineering. This paper discusses some challenges for computational electromagnetics in the modeling and simulation of multiphysics problems that involve the interaction between electromagnetic fields and other physical phenomena.
The dual-primal finite-element and interconnecting algorithm (FETI-DP) is efficiently applied in parallel to compute the far-field scattering from a wafer with sub-wavelength patterns. As a nonoverlapping domain decomposition method for solving large-scale problems, the FETI-DP algorithm formulates a global interface…
The design of task-oriented metamaterial coatings able to improve the radiation characteristics of reference linear arrays is demonstrated in this paper. Towards this end, the synthesis problem is formulated within the Material-by-Design (MbD) framework and it is solved by means of an advanced Quasi-Conformal Transfor…