Materials Literature
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O presente trabalho trata do estudo referente ao desempenho da fibra vegetal amazônica curauá (Ananas erectifolius) aplicada no processo de produção dos painéis de cimento portland, analisando a compatibilidade, os tratamentos realizados nas fibras de curauá, visando à melhoria das propriedades físicas e mecânicas dos…
Research on radionuclide accumulation is significant for analyzing the source term in a severe accident. The previous method utilizing the point depletion computer code to analyze radionuclide accumulation assumes that thermal power density and burnup distribution are uniform. And the different fuel enrichment in diff…
Among numerous Antarctic and Arctic species of ciliates that we have stably adapted to grow in laboratory, Euplotes petzi has attracted particular interest because of its strict psychrophilic behavior (it does not tolerate temperatures above 8-9 °C) and capacity to constitutively secrete signaling protein pheromones.…
A micro/nanofluidic device containing linearly arranged gold nanoparticles embedded in nanochannels was developed for highly sensitive surface-enhanced Raman spectroscopy (SERS). The Si nanochannel array was fabricated using a photolithography-based process. Synthesized colloidal particles of mean diameter 100 nm were…
The accurate and speedy characterization of aqueous foams generated by the use of surfactants are critical for the formulation of soaps and detergents. This paper describes details of experimental studies directed towards measurement of foaming properties of mixture of ethanol, hexanol and sodium lauryl sulfate (SLS).…
In recent years, global environmental issues such as global warming and depletion of fossil fuels are serious. As a solution, it is conceivable to utilize a hydrogen energy instead of gasoline. High-pressure storage is a mainstream method of storing hydrogen in fuel cell vehicles. On the other hand, there is a problem…
In the Fukushima Daiichi nuclear power plant accident in 2011, the tsunami attacked the power plant and station blackout occurred. As a result, core meltdown was intended at Unit 1, 2 and 3. To remove molten fuels from the Fukushima Daiichi nuclear power plants, it is necessary to know the current status of the reacto…
NASA and other research groups testing two non-petroleum-based jet fuels in pursuit of alternative fuels.
< Ti-Nb-X 合金における α''-β 相間の変態ひずみと相安定性に及ぼす 合金元素 X の影響の第一原理計算> < The effect of alloying element X on transformation strain and phase stability between α'' and β phase In Ti-Nb-X ternary alloys from first-principles calculations.><南大地・大阪府立大学[院]>
Metallic ion concentration on Ni-W planting bath had little influence on the thickness of Ni-W films. On the other hand, concentration increasing of metallic ion decreased the content rate of W in Ni-W film and suppressing nodules on Ni-W film. Ni-W plating bath with a metallic ion concentration of 0.75 M was largely…
The conversion of solar energy into electricity is in the focus of a large number of scientists. Because of the problems caused by the use of fossil fuels, the use of renewable and environmentally friendly energy sources is desirable, and in some countries the use of a certain percentage of such energy sources becomes…
Armchair graphene nanoribbons (a-GNRs) are finite strips of graphite sheets cut along a specific direction with a width < 10 nm and a length/width ratio > 10. 1 They feature peculiar electronic and optical properties so they have been touted as a promising material for everything from solar cells to computers.2 The en…
Field programmable gate arrays (FPGAs) are gaining increased attention worldwide for application in the instrumentation and control systems for nuclear power plants. In this paper, we study potential application of FPGAs in the radiation environment of an accelerator driven sub-critical (ADS) system, where a spallatio…
Atomic force microscope (AFM) has been widely used as a tool, not only for the measurement of surface topography and the characterization of localized surface properties at nanometric scale, but also for nanolithography and nanostructure fabrication. In this paper, we propose a novel nanofabrication technique for a wi…
Residual stress that is mainly caused by heat treatment is one of the important factors in mechanical products such as internal combustion engines, since it affects the maintenance of peak performance and operational durability in competitive scenarios. In past, a phase transformation analysis method, in which volume…
Impact test of single crystal silicon was performed at -80℃, room temperature and 500℃. We fabricated test chips that consist of four beams supporting central dead weight. It was mounted on an impact shuttle and we indicated fracture probability curve of acceleration. Experimental result, compared to 50 % destruction…
The cyclic deformation behavior of AZ31 magnesium alloy sheet metal have been investigate in order to reveal the general material elasto-plastic behaviors related with its texture, such as Bauschinger effect and flow stress during stress reversal, by finite element analyses. To discuss these phenomena of AZ31 magnesiu…
Microbubbles are very small air bubbles with diameters on the order of less than several tens of micrometers. A crucial characteristic of microbubbles is that they are electrically charged on their surface (ζ-potential). In the previous study, we conducted an experiment of the effect of microbubble bathing on organism…
Since its first use to solve the structure of sodium chloride in 1915 X-ray crystallography has developed significantly to become the premier technique for obtaining 3D structural information of small molecules and macromolecules alike. As the technique continues to develop and focus its attention on weak diffraction…
We developed a motion assistance apparatus which can be used for neuro-rehabilitation of patients and for the promotion of exercise for the elderly. This apparatus assists only the ankle joints of the equipped person according to the posture of him/her while walking, getting up, sitting, and standing. To confirm the e…