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81.
Syuji Fujii Yukihiro Nishimura Atsushi Aichi Soichiro Matsuzawa Yoshinobu Nakamura Kensuke Akamatsu Hidemi Nawafune 《Synthetic Metals》2010,160(13-14):1433-1437
Polyaniline–silver nanocomposites were synthesized in the form of colloidal particles by the facile one-step aqueous chemical oxidative dispersion polymerization of aniline using silver nitrate as an oxidant and poly(vinyl alcohol) as a colloidal stabilizer. Aniline monomer was oxidized by silver ions, yielding polyaniline and elemental Ag simultaneously. The synthesized nanocomposite particles were colloidally stable over 2 years and transmission electron microscopy studies indicated the production of spherical, plate and rod-shaped polyaniline–silver nanocomposite particles with a silver core–polyaniline shell morphology. The conductivity of a pressed pellet of the nanocomposite particles using the conventional four-point probe technique was 1.4 × 10?2 S/cm at 25 °C. The nanocomposite particles behaved as a ‘colored’ particulate emulsifier for the stabilization of transparent oil-in-water emulsions. 相似文献
82.
The effect of write induced pole tip protrusion on the magnetic spacing of the head/disk interface has to be taken into consideration as flying heights approach the spacing regime of a few nano-meters. Thermal flying height control (TFC) sliders are presently in common use in hard disk drives to control the flying height at the read/write element during drive operations. In this paper the flying characteristics of TFC sliders with dual heater/insulator elements are investigated. Simulation results are shown for situations where the write current is ??on?? and where the write current is ??off??. The effect of design parameters of two heater/insulator elements is studied to optimize the performance of TFC slider. 相似文献
83.
K. Proke Th. Wand A.V. Andreev M. Meissner F. Honda V. Sechovský 《Journal of Alloys and Compounds》2008,460(1-2):47-53
Specific heat of a single crystalline URhSi was measured by a relaxation method in a temperature range 0.3–25 K in magnetic fields up to 8 T applied along the two of the principal axes. The low-temperature specific heat exponentially decays with magnetic field. The decay is much faster in fields applied along the easy magnetization direction (the c-axis) than for the hard axis (the a-axis) case. A strong upturn in cp/T versus T below 0.6 K that disappears with application of magnetic field is observed suggesting possible magnetic or superconducting phase transition at lower temperatures. The electrical resistivity in the vicinity of the ferromagnetic phase temperature is found to be reduced by more than 50% upon application of magnetic field of 8 T applied along the c-axis. URhSi represent an itinerant ferromagnetic system with influence of spin fluctuations. 相似文献
84.
Kazuhiro Honda 《Thin solid films》2008,516(5):826-828
Growth of tungsten silicide (WSix) on tungsten (W) catalyzer surface is investigated by monitoring resistance change of heated W wire in silane (SiH4) atmosphere. To know a method suppressing the silicide formation, the effect of carbonization of W surface is also studied. Resistance change of heated W, observed in initial stage just after SiH4 introduction, is brought about increase in power consumption due to decomposition of SiH4. This power consumption can be drastically reduced when W surface is carbonized. Therefore, carbonization of tungsten surface is effective to stabilize the catalyzer temperature and to suppress W silicidation. 相似文献
85.
Shiang Suo Huang Lan Hui Chih Chia Hsien Lin Long Y. Chiang Tadahiko Mashino Masataka Mochizuki Kensuke Okuda Takasi Hirota Ming-Cheng Tsai Ming Cheng Tsai 《Fullerenes, Nanotubes and Carbon Nanostructures》2001,9(3):375-395
The effects of hexasulfobutylated (FC4S), the fullerene derivative on the contraction of smooth muscle were tested pharmacologically on the circular muscle of stomach of guinea pigs. The effects of monomalonic acid C60 (MMA C60) on the same preparations were compared. The effects of those compounds on the taenia coli, portal vein and vas deferens of guinea pigs were also tested. The FC4S did, while MMA C60 did not elicit contracture of the circular muscle of stomach and taenia coli. Both FC4S and MMA C60 did not elicit contraction on the portal vein and on the vas deferens of the guinea pig. Prazosin (0.5 μM) or propranolol (0.5 μM) did not alter the FC4S elicit contracture of the circular muscle of stomach. However, atropine (0.01, 0.1 and 1 μM), tetrodotoxin (0.1 μM) or low calcium medium decreased reversibly the FC4S elicited contracture of the circular muscle of stomach. The effect of FC4S on the contracture of the gastric muscles was also tested using various muscarinic receptor subtype antagonists. 4-DAMP (1 μM), muscarinic M3 receptor antagonist, and tropicamide (1 μM), muscarinic M4 receptor antagonist, did not alter the contracture elicited by FC4S. Pirenzepine (0.1 μM), muscarinic M1 receptor antagonist, and methoctramine (0.25 μM), muscarinic M2 receptor antagonist, significantly decreased the FC4S elicited contracture of the circular muscle. Atropine (1 μM) or tetrodotoxin (0.1 μM) completely blocked the FC4S elicited contracture of the circular muscle of stomach. It is concluded that FC4S elicited contracture of the circular muscle of stomach. The effect may be due to FC4S acts on the cholinergic cells existed in the gastric muscle and indirectly activating the tetrodotoxin dependent releasing of the transmitters from the cells, then, activating the muscarinice M1, M2 receptors in the muscle eliciting the contractures. 相似文献
86.
An operation-level robot language for parts handling has been developed, in which stress is laid on the systematization of the hierarchical structure of verbs (and verb phases) and the realization of and interpreter of the language for controlling a robot arm. In this research, the circumstances are defined as a robot arm, shelves (work benches), boxes and objects on a floor. In the user's programming, eighteen verbs can be utilized: [Level 3] place on, stack on, lift down, carry, direct to, put in, put out, push and draw; [Level 2] have, lift and put; [Level 1] go, raise, lower, seize (grip), detach and turn. In the system, a verb module is reduced to a sequence of the verb modules immediately one level below it, and a series of control commands to a robot controller is automatically generated. 相似文献
87.
Tsuyoshi Kawai Akihiro Kubota Kensuke Kawamura Hiroyuki Tsumatori Takuya Nakashima 《Thin solid films》2008,516(9):2666-2669
Diffusion kinetics of three dyes in nematic liquid crystals are studied with single-molecule fluorescence autocorrelation spectroscopy. Markedly large anisotropy was observed in the diffusion coefficient and structure of diffusion molecules showed no marked effect on the anisotropy. 相似文献
88.
Summary Poly(dithiafulvene)s having alkoxy group and mesogenic moiety in the side chain were prepared by cycloaddition polymerization.
The effects of the side chains on the structural and optical properties of poly(dithiafulvene)s in solution were investigated.
Furthermore, the film state properties of the polymers and their charge transfer complex with electron acceptor were studied
before and after annealing. 相似文献
89.
Kensuke Takei Keiichi Tsuto Shigeyuki Miyamoto Junya Wakatsuki 《Journal of the American Oil Chemists' Society》1985,62(2):341-347
Lauryl sulfate and lauryl ether sulfate obtained by the sulfation of lauryl alcohol and lauryl alcohol ethoxylate are representative
of anionic surfactants and are used as a formable detergent or an emulsifier. For the sulfation of lauryl alcohol and lauryl
alcohol ethoxylate, SO3 gas, it was found that the quality of products was significantly influenced by the reaction conditions. In order to obtain
good quality products we developed a new technology by using a new type of reactor called a “climbing film reactor,” in which
SO3 gas and liquid raw material flow ascendingly. 相似文献
90.
Ray Nakashima Shuanghui Hao Hideki Honda Ryuichi Oguro Hidekazu Miyakawa Teruo Tsuji 《Electrical Engineering in Japan》2004,147(4):68-76
In this paper, position control of a linear slider with twin linear drives is considered. Recently, for high‐speed response, several linear motors have been used for linear slider systems. In such a linear slider, if the linear drives are controlled individually, their position responses may undergo vibrational disturbance by interaction with the output of the motors. To control this vibration, this paper presents a dynamic model of a linear slider system which consists of two motion systems decoupled by coordinate transformation, and proposes a feedback controller which is designed for these two decoupled systems. The effectiveness of the proposed method is confirmed by experiments. © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 147(4): 68–76, 2004; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.10291 相似文献