Materials Literature
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In present work, anodic polarization tests are conducted on different steel specimens to find out corrosion zone potentials of various corrosion zones. The tests are done in the concrete powder solution extracts contaminated with the varying levels of admixed chloride and sulfate salts, at varying w/c ratios and cemen…
Diversas técnicas são utilizadas para a remediação de áreas contaminadas por derivados de petróleo, as quais podem causar severos danos ambientais e à saúde humana. O objetivo deste trabalho é comparar a eficiência de três dessas técnicas: bombeamento, TPE (Two Phase Extraction) e DPE (Dual Phase Extraction), na remed…
Study of electrokinetics of nematic liquid crystals (LCs) with dissolved impurities hold utmost importance in understanding director distribution characteristics and modified flow rheology. However, no concrete theory for the non-uniform potential and ionic species distribution, due to an induced electrical double lay…
Abstract In dieser Arbeit wurde ein Prüfverfahren angewendet, das statische, zyklische Belastung von Klebstofffugen infolge Quellen und Schwinden des Holzes simuliert und plastische Verformungen im niedrigen Lastbereich aufzeigt. Es wurde das elastische Verhalten von Zugscher‐Prüfkörpern, welche aus Buchenholz verkleb…
Background: Extrauterine fibroids are rare and are usually difficult to diagnose. Benign metastasizing leiomyomatosis (BML) is characterized by multiple smooth-muscle nodules located on the peritoneum, omentum, or rest of peritoneal surface. Case: A 42-year-old woman presented for a routine gynecologic examination; an…
Recent industrial results around directed self-assembly (DSA) of block copolymers (BCP) have demonstrated the high potential of such technique. One of the main advantages of this method is the reduction of lithographic steps thus leading to cost reduction. At the same time, the associated correction for mask creation…
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A new Markov Chain Monte Carlo method for simulating the dynamics of molecular systems with atomistic detail is introduced. In contrast to traditional Kinetic Monte Carlo approaches, where the state of the system is associated with minima in the energy landscape, in the proposed method, the state of the system is asso…
碳纤维织物增强聚苯硫醚（CFF/PPS）复合材料是重要的热塑性航空复合材料,其难点为提高碳纤维（CF）与基体的浸润性及界面强度。探讨了CF表面修饰对CFF/PPS界面结合强度的影响,对比了热处理去浆及三种表面修饰剂对碳纤维单丝及CFF/PPS复合材料的改性效果。采用X射线光电子能谱分析（XPS）、扫描电子显微镜（SEM）、单丝强度测试、复合材料静力学测试和动态力学分析等手段对CF表面修饰效果进行评价,建立了基于CF表面修饰制备高性能CFF/PPS热塑性航空复合材料的方法。制备的复合材料层间剪切强度达91.4MPa,弯曲强度953.7MPa,拉伸强度797.4MPa,模量68.4GPa,冲击强度58.3kJ/m^2,用SEM观察到C…
This work presents a methodology for interfacing with the students in order to study impact problems. The results are derived from the Bachelor Thesis developed at the end of the fourth course in the Security Engineering Degree. The knowledge regarding security topic and the use of new analysis tools (commercial finit…
以Nb,Si粉末为原料,采用放电等离子烧结（SPS）技术制备了二元Nb-Si超高温材料,研究了烧结温度、保温时间、加热速率和冷却速率等工艺参数对材料物相组成、微观组织和室温力学性能的影响。结果表明：烧结温度在1300℃以上时,材料主要由Nbss（铌基固溶体）和α-Nb5Si3两相组成,材料的致密度和室温力学性能随着烧结温度的升高而不断提高,在1600℃制备的材料力学性能最好;在1600℃时,随着保温时间的延长,材料的物相组成和微观组织基本没有变化,而其力学性能有小幅度提高;较慢的加热速率和烧结完成后较快的冷却速率均有利于提高材料的室温力学性能。应用优化后的SPS工艺,制备出了室温综合力学性能优异的Nb-Si超高温材料。
Hand gloves (hereafter referred to as gloves ) are used in the detonator manufacturing and packaging operations. As part of a process improvement program, new glove formulations have been considered that lower the overall risk of detonator operations by reducing ergonomic injury factors. Gloves with a specially treate…
A lab on-a-chip is a miniaturized device that integrates onto a single chip different analytical steps (preconcentration, separation, detection...) with minimal sample consumption and short analysis time. They are potentially beneficial in phosphorylated biomarker analysis for which a preconcentration step is necessar…
L’objectif de cette these est le diagnostic des defauts dans les machines electriques asynchrones triphasees a cage d’ecureuil par un modele de simulation basee sur la methode des elements finis 2D. La technique d’analyse spectrale du courant satorique est la plus utilisee pour diagnostiquer les differents defauts dan…
We present a comprehensive and integrated model-independent ab initio study\nof the structural, cohesive, electronic, and optical properties of silicon\nquantum dots of various morphologies and sizes in the framework of all-electron\nstatic and time-dependent density functional theory (DFT, TDFT), using the\nwell-test…
Der vorliegende Bericht dokumentiert die Arbeiten und Ergebnisse des DLR Teilprojekts im LuFo IV-4 Verbundprojekt Inga. Ziel ist die Entwicklung von Lösungen zur strukturellen Integration von Funktionselementen insbesondere für die elektrische Erdung, Beleuchtungs- und Designapplikationen in Flugzeuggalleys. Des Weite…
A series of uranium-doped silicate glasses were created at (Lawrence Livermore National Laboratory) LLNL, to be used as working reference material analogs for low uranium concentration research. Specifically, the aim of this effort was the generation of well-characterized glasses spanning a range of concentrations and…
ADVERTISEMENT RETURN TO ISSUEPREVAddition/CorrectionNEXTORIGINAL ARTICLEThis notice is a correctionCorrection to "Temperature and Pressure Dependence of the Viscosities of Krytox GPL102 Oil and Di(pentaerythritol) Hexa(isononanoate)"Kenneth R. Harris*View Author Information School of Physical, Environmental and Mathem…
ADVERTISEMENT RETURN TO ISSUEEditorialNEXTTable of Contents Images: Science and Beauty = ClarityJillian M. BuriakCite this: Chem. Mater. 2016, 28, 6, 1589–1590Publication Date (Web):March 22, 2016Publication History Published online22 March 2016Published inissue 22 March 2016https://pubs.acs.org/doi/10.1021/acs.chemma…
Based on the Eulerian hydrocode MMIC-2D for explosion and impact problems, both particle mapping method and mass loss model based on heat-melting theory are implanted. High velocity projectiles penetrating into concrete targets are numerically simulated with MMIC-2D. The simulation results are compared with related ex…