SiO2 pillar arrays with high aspect ratios were fabricated by nanoimprinting using ordered anodic porous alumina as a mold. The size and shape of SiO2 pillars could be controlled by changing the geometrical structures of the anodic porous alumina mold. The used of the obtained SiO2 fine patterns composed of ordered arrays of tapered pillars could effectively suppress the reflectance of incident light at the surface of the sample.
Edited by Richard CogdellKeywords: Ferredoxin X-ray crystallography Thermostability [2Fe-2S] Spinacia oleracea Cyanidioschyzon merolae a b s t r a c t Cyanidioschyzon merolae (Cm) is a single-cell red alga that grows under moderately thermophilic (40-50°C), acidic (pH 1-3) conditions. We purified a Cm ferredoxin (Fd) that was characterized as a plant-type [2Fe-2S] Fd by physicochemical techniques. X-ray crystallography revealed that the overall three-dimensional structure of CmFd was highly similar to, but slightly different from, the [2Fe-2S] Fd from Spinacia oleracea, whose growth temperature is 15-20°C. Therefore, slight structural differences, including non-covalent-bond number and amino acid sequence, may underlie the differential thermostabilities of the plant-type Fds.
Finite difference time domain (FDTD) method is a very poplar way of numerically solving partial differential equations. FDTD has a low operational intensity so that the performances in CPUs and GPUs are often restricted by the memory bandwidth. Recently, deeply pipelined FPGA accelerators have shown a lot of success by exploiting streaming data flows in FDTD computation. In spite of this success, many FPGA accelerators are not suitable for real-world applications that contain complex boundary conditions. Boundary conditions break the regularity of the data flow, so that the performances are significantly reduced. This paper proposes an FPGA accelerator that computes commonly used absorbing and periodic boundary conditions in many 3D FDTD applications. Accelerator is designed using a "C-like" programming language called OpenCL (open computing language). As a result, the proposed accelerator can be customized easily by changing the software code. According to the experimental results, we achieved over 3.3 times and 1.5 times higher processing speed compared to the CPUs and GPUs, respectively. Moreover, the proposed accelerator is more than 14 times faster compared to the recently proposed FPGA accelerators that are capable of handling complex boundary conditions.
Moth-eye structures composed of an ordered array of tapered SiO2 pillars were fabricated by photo-nanoimprinting using anodic porous alumina as a mold. The formation of SiO2 moth-eye structures was carried out using a photosensitive polysilane solution as a precursor of silica. The SiO2 moth-eye structures formed on the surface of a glass plate effectively suppressed the reflection of incident light.
In the field of engineering geology, rock color is described by sensuous manner. In this paperthe relationships between numerical color change of rock which were measured by chronometer and degree of weathering are described. Measured samples are a variety of different geologial ground types (granite, sandstone and felsic volcaniclastic rock). As the results, the turning of rock color to yellowish-brown with weathering is responsible for progressive accumulation of iron hydroxides into microcracks and pores. And then above process is also related to the change of rate of moisture absorption and absolute dry specific gravity. It is accounted that the numerical rock color is effective for an accurate and objective evaluation of rock ground .
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