Materials Literature
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It is difficult to obtain the pure YAP phase in YAP:Ce pellets synthesized by solid-state reaction at high temperature (up to 1500°C), because a small amount of YAG (Y3Al5O12):Ce tends to form, resulting in additional emission and degrading the scintillation performance. We attempted three methods to suppress the form…
Transparent ceramics of Y2O3doped with 0.5 mol% Tm were fabricated starting from the synthesis of the precursor nanopowder by co-precipitation and calcination followed by its consolidation into fully dense ceramics. Densification and optical transparency of the ceramic were achieved by means of sequential steps of col…
PET/MRI systems require specialized PET detectors that can function inside of an MRI bore without interfering with MRI functionality. Ideally such a detector would be physically compact, low power, immune to interference from the MRI, and with minimal interference to the MRI, while preserving all PET timing, energy, a…
Formation of a high density of Ni-Mn-Si nm-scale precipitates in irradiated reactor pressure vessel steels, both with and without Cu, could lead to severe embrittlement. Models long ago predicted that these precipitates, which are not treated in current embrittlement regulations, would emerge only at high fluence. How…
본 연구는 산림에서의 운동이 β-endorphin과 Norepinephrine에 미치는 영향에 대하여 알아보고자 하였다. 대학생 10명을 대상으로 주 3회 씩 8주간 숲에서의 운동을 실시하였다. 산림에서의 운동은 일회 60분씩 실시하였으며, 숲에서의 운동 전ㆍ후에 β-endorphin과 Norepinephrine를 측정하였다. 산림에서의 운동을 통하여 수집된 자료를 각 변인별 측정치의 실수, 백분율 그리고 평균과 표준편차를 구하였으며, 각 변인별 산림에서의 운동 전ㆍ후에 따른 β-endorphin과 Norepinephrine에 대하여 paired T-test를 실시…
Codoping is a method of current interest for modifying the properties of scintillators. The study reported here explores the effect of codoping on cerium doped Gd3Ga3Al2O12(GGAG:Ce) crystals with various concentrations of Ca. These single crystals were grown via the Czochralski technique with Ce concentrations fixed a…
Le projet ITER (International Tokamak Experimental Reactor) et plus particulièrement les projets de modules expérimentaux de couverture et les composants faisant face au plasma, posent des défis technologiques comparables à ceux des réacteurs à fission à neutrons rapides et à haute température.En effet, dans les deux…
Recently, Micro-lattice was introduced as the lightest metal with a truss structure which is fabricated using 3D Lithography technology. It has very high porosity. That is, at maximum, 99.99% of the volume is filled with air and only remaining 0.01% is made of metal. Because the truss structure is composed of hollow t…
En el extremo sudeste de la Sierra de Velasco, al oeste de la ciudad de La Rioja, Argentina, se desarrolla una faja de cizalla denominada Faja Milonítica Sur, como consecuencia de una deformación de carácter dúctil del plutón granítico San Cristóbal en condiciones de facies esquistos verdes. En este trabajo se evalúa…
In this research, using pyrolysis of phenolic resin in the presence of silicon particles, the SiC ceramic composite is formed. The samples were prepared by introducing 30, 35, 40, 45 and 50 wt% of Si particles to the phenolic resin. The samples were cured at 180°C then carbonized at 1100°C. The final carbonized C/Si c…
در این تحقیق، عملکرد یک غشای پلیمری تحت فرآیند اولترافیلتراسیون آب تولید شده همراه نفت با استفاده از یک فرآیند دو مرحلهای مورد بررسی قرار گرفت. در مرحله اول، تاثیر پارامترهای عملیاتی مانند اختلاف فشار دو طرف غشاء، دما و سرعت جریان عرضی خوراک بر روی میزان افت فلاکس ناشی از گرفتگی غشا در طول فرآیند مورد مطالعه قرار گرف…
We present theoretical evidence for the phase evolution and stability of Fe substituted RMn₂O 5-δ (R=Bi, Sm or Y) mullite structures. Our density-functional simulations show evidence for the R site dependence of the mullite phase evolution with the Fe content in the solid solution. For Fe in R=Y or Sm compounds, the o…
A fast moving system’s fragments are produced during an unexpected event and it can be incurred an impact with the case of fast moving system(CFMS). To prevent the fragment of fast moving system from penetrating the CFMS, the collided body is required to design not to be penetrated using analysis of simulation method…
Air Products is carrying out a scope of work under DOE Award No. DE-FE0012065 “Development of ITM Oxygen Technology for Low-cost and Low-emission Gasification and Other Industrial Applications.” The Statement of Project Objectives (SOPO) includes a Task 4f in which a Decision Point shall be reached, necessitating a re…
ZnO:Al (AZO) thin films were prepared on glass substrates by radio frequency magnetron sputtering at 300℃. Effects of H_2/(H_2 + Ar) flow rate ratio (R_H) during sputtering and post-deposition hydrogen plasma treatment on structural, electrical, and optical properties of AZO thin films were investigated and compared.…
Many studies have been conducted for Periodic Cellular Metals(PCMs) to obtain high strength and stiffness for a given weight. To date, a number of structures have been proposed, and they mostly have truss structures such as Pyramid, Octet, Kagome, etc. Recently, Microlattice, a ultra-low density metal(ULDM) composed o…
On superhydrophobic (SHPo) surfaces, either of two wetting states ?the Cassie state (i.e., non-wetted state) and the Wenzel state (i.e., wetted state) ? can be observed depending on the thermodynamic energy of each state and experimental conditions. Each wetting state leads to quite a distinctive dynamic characteristi…
This paper presents the shape design for reducing cogging torque and characteristic analysis in Brushless DC (BLDC) motor. In this BLDC motor, Δ(delta)-winding is applied, and in order to obtain the 60° trapezoidal phase back-EMF waveform, permanent magnet shape design is carried out. And then, a method on specifying…
Se presentan los efectos reforzantes de la radiación gamma en compuestos de polietileno de alta densidad y residuos de madera Bolaina blanca (Guazuma crinita) procedentes de la región Pucallpa. Las muestras han sido mezcladas con anhídrido maléico y extruidos a temperaturas comprendidas entre 170 y 200 ºC, obteniéndos…
Electrochemical signal current can be enhanced by increasing surface area of the electrode or integrating nanopores at the electrode surface. However, complex processes have limited wide-application of nanoporous electrodes. We present a simple method enhancing redox current signal of electrochemcal sensors based on c…