Materials Literature
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Following two illustrative examples, a quite general form for the functional derivative of the Dirac density matrix {gamma}(r{sub 1},r{sub 2}) with respect to the electron density {rho}(r) is proposed. In turn, this functional derivative is related to a further three-point object, which reduces to the linear response…
This report summarizes results from a 3-year Laboratory Directed Research and Development project performed in collaboration with researchers at Rensselaer Polytechnic Institute. Our collaborative effort was supported by Sandia's National Institute for Nanoengineering and focused on the study and application of nanosc…
The Heat Transport system loop stability of CANDU-6 reactor as Wolsong-1 with the CANFLEX fuel bundle has been studied. The SOPHT modelling of the CANFLEX fuel bundle and the ROH interconnection line was made and the stability analysis response of Wolsong-1 reactor with CANFLEX fuel bundle was obtained. The mechanics…
Abstract Experimental data which demands that one transcends the ‘method of neutral pseudoatoms’ for expanded alkali metals is first summarized. A chemical ‘bondrlsquo; provides a more basic building block than a pseudoatom. This ‘bond’ can be characterised by potential curves1σ+ u and 3σ+ u of the appropriate free-sp…
The combustion reaction of polyvinylchloride(PVC) was investigated using a thermogravimetric technique under an air atmosphere condition at several heating rates from 10 to 50℃/min. To obtain information on the kinetic parameters, the dynamic thermogravimetric analysis curve and its derivative were analyzed by a varie…
Este trabalho tem como objetivo o estudo comparativo do processo de fragilizacao assistido por hidrogenio nos acos API 5L X60 e API 5L X80. A partir de testes de permeacao eletroquimica de hidrogenio foram determinados os parâmetros de difusividade, solubilidade e permeabilidade nestes acos. Foram realizados dois tipo…
Rubber materials are used in automotive parts such as tires and gaskets. For the developement of these complex parts the use of simulation tools and therefore an appropriate model of such materials is necessary. The most assemblies are composed of a solid rubber part and a porous rubber part, both carbon black-filled.…
Global growth of nuclear energy in the 21st century is creating new challenges to limit the spread of nuclear technology without hindering adoption in countries now considering nuclear power. Independent nuclear states desire autonomy over energy choices and seek energy independence. However, this independence comes w…
Defect energies in two- and three-dimensional classical crystals correlate with the shear modulus mu ; in turn this relates the melting temperature Tm intimately to mu . Thus, a model is first proposed for the shear modulus for two-dimensional Wigner crystals. The melting temperature is then determined from the Koster…
Background: For laparoscopic cholecystectomy, pain is most frequent complaint and the most common cause of delayed discharge. The aim of this study was to determine the effect of preoperative administration of celecoxib on the level of postoperative pain in patient undergoing laparoscopic cholecystectomy. Methods: We…
Semi-empirical fitting based on classical Bohr theory has been applied to the experimental LET data in silicon of the RADEF heavy ion cocktail species. The parameterized LET descriptions to be used in the European Component Irradiation Facilities are introduced and compared with the commonly used estimations from SRIM…
Na+/H+逆向转运蛋白调节细胞内的离子内平衡, 在植物耐盐性起重要的作用. 本研究克隆一个大豆Na+/H+逆向转运蛋白的同源基因GmNHX2, 编码一条长534氨基酸的多肽并预测有10个可能的跨膜结构域. GmNHX2在大豆的根、茎和叶中表达, 但在根中的丰度最高, 受NaCl和PEG (polyethylene glycol)处理的诱导表达. GmNHX2与LeNHX2和AtNHX2的序列相似性高于AtNHX1和AtSOS1. 尽管系统发育分析将GmNHX2与细胞器(液泡和囊泡)逆向转运蛋白聚成一类, 但亚细胞定位的结果表明GmNHX2-EGFP (enhanced green flurescent protein)融合蛋白可…
A free-electron-like model is first shown to lead to the eigenvalue sum of the π electrons in almost spherical C cages, being proportional to N, where N is the number of C atoms. The model is also closely related to a tight-binding model, stemming from the Huckel theory of π electrons. The equilibrium radius R e of th…
Abstract Total energies for the paramagnetic (P) and ferromagnetic (F) metallic phases of jellium are calculated using interpolation formulae adjusted to the results of computer simulation studies. For the Wigner insulator (W), the total energy given by an early theoretical model is found to agree closely with recent…
Traditionally, many contact sensors have been employed to collect data during an impact test. Often to select the appropriate data acquisition equipments and sensors, prior knowledge of the magnitude of the peak crushing parameters and the duration of the crash event is important. However, this is not an easy task. An…
Surface transfer doping relies on charge separation at interfaces, and represents a valuable tool for the controlled and nondestructive doping of nanostructured materials or organic semiconductors at the nanometer-scale. It cannot be easily achieved by the conventional implantation process with energetic ions. Surface…
Finally, the weft delivery of the RIEMCHENTRANSPORT was replaced by FOUMISSEUR. In order to find a solution of this problem is investigating the factors affecting the width fabric in the direction of warp and weft. The study of the weft direction has a significant impact on this characteristic, namely weft yarn tensio…
When a radioactive source is being counted, a detected disintegration cannot be recorded during a Dead-Time period. In this report experiments are described which show that the graph of the distribution of detected disintegrations during Dead-Time periods is a horizontal line. Based on this observation, an alternative…
An ECS meeting in Europe is always an energetic event because we produce extraordinary technical programs and attract many of the best scientists in our discipline to one of the world’s greatest destinations.
Abstract A formal proof has recently been proposed [I.A. Howard, N.H. March, Chem. Phys. Lett. 402 (2005) 1.] to show that the exchange-correlation potential V xc ( r ) of density functional theory (DFT) is, in principle, determined by the idempotent Dirac density matrix γ ( r , r ′) generated by the one-body potentia…