http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Yoshiaki (검색결과 370 건)
- 무료
- 기관 내 무료
- 유료
-
-
In-plane Anisotropy of the Magnetic and the Electric Properties of the Fe Pnictide Ba(Fe1−xCox)2As2
Yoshiaki Kobayashi,Akihiro Ichikawa,Masayuki Toyoda,Masayuki Itoh,Masatoshi Sato 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.3
The anisotropy of the electronic and the magnetic properties within the FeAs planes of Co(2%)-doped BaFe2As2 has been investigated by using 75As nuclear magnetic resonance (NMR) measurementson the As (As0) sites with all four nearest neighbor sites occupied by Fe. Even in thetetragonal phase at temperatures above 100 K, two sets of NMR spectra with twofold symmetry ofin-plane Knight shifts and electronic nuclear quadrupole frequencies are observed. They originatefrom two domains with their symmetry axes lying at right angles to each other. The anisotropies ofthe electronic and the magnetic properties become pronounced at 140 K, below which an in-planeanisotropy is reported to appear in electrical resistivity under a pressure along one of Fe-Fe directions. 75As NMR measurements have also been carried out for the As (As1) sites surrounded byone Co and three Fe. From the data, we conclude that the spin susceptibility of As1 is ~1/3 thatof As0 and that the antiferromagnetic spin fluctuation of As1 is fairly suppressed as compared withthat of As0. We discuss these behaviors of the FeAs layer in connection with the impurity-inducedlocal orbital order model proposed by theoretical studies.
-
-
Electrical breakdown of microwave plasma in water
Yoshiaki Hattori,Shinobu Mukasa,Hiromichi Toyota,Shinfuku Nomura 한국물리학회 2013 Current Applied Physics Vol.13 No.6
The electrical breakdown of microwave plasma in water was investigated between 1 and 30 kPa. The dependency of the ignition power for generating plasma on the size of coaxial electrode was measured. The ignition power decreases with a decrease of the diameter of the inner electrode. The behavior of microwave plasma in water was observed using a high-speed camera. The plasma ignites in a bubble generated by microwave heating. The model for calculating the electric field was created on the basis of the captured images of the bubble just before plasma ignition. The method presented can be used to visualize the electrical field distribution in the bubble. The electric field breakdown was calculated using the measured ignition power. The electric field breakdown of plasma in water is of the same order as gas phase plasma.
-
-
Development of a Brain-Computer Interface using Steady State Visual Evoked Potential
Yoshiaki YOSHIDA,Junichi USHIBA,Yutaka TOMITA 대한인간공학회 2007 대한인간공학회 학술대회논문집 Vol.- No.-
Visual Evoked Potential (VEP) is a damped oscillation-like reaction brain wave obtained from a cerebrum vision field by visual stimulation lasting almost one second. VEP is divided into two categories. One is a transient VEP (t-VEP) observed with low stimulation cycle, and the other is a steady-state VEP (ss-VEP) observed with high stimulation cycle. The former is the reaction wave for every stimulus, while the latter is the fused waveform of t-VEPs, and observed as sinusoid. Since ss-VEP is known to synchronize with the stimulation wave, from the brain wave we can decide the illumination frequency. This study aims the development of a device, which can recognize the LED at which patient gazes, when several light emitting diodes (LEDs) illuminating with different driving frequencies. By assigning the LEDs to specific functions, such as calling caregivers, opening/closing a curtain, ON/OFF of TV set, our device can work as an input part of an environment control system for quadriplegic patients. Our device records brain wave from electrodes mounted on ear pads and nose pads of an eyeglass frame, rather than from electrodes on vision cortex, while the SNR was much smaller than vision cortex lead. In order to overcome the less SNR signal processing was employed. The measured brain wave with eyeglass frame electrodes was analyzed with FFT and Autoregressive-model estimate, and we could identify the light source that the patients stared.
-
Yoshiaki Hayashi,Keshav Lall Maharjan,Hajime Kumagai 아세아·태평양축산학회 2006 Animal Bioscience Vol.19 No.2
Twenty small-scale farms of two villages (A and B) were surveyed to identify the feeding traits, milk productivity and nutritional status of lactating cattle and buffalo in Terai, Nepal. Constituents and dry matter (DM) of feed supplied, body condition score (BCS), heart girth (HG), bodyweight (BW), milk yield (MY) and plasma metabolites were obtained in the pasture-sufficient, pasturedecreasing and fodder-shortage periods. Milk yield of 305-day lactation was estimated by the daily MY. The supplies of rice straw and native grass were lower and higher in the pasture-sufficient period than in the other periods, respectively (5.5 kg/day vs. 9.8 kg/day and 3.2 kg/day vs. 0.4 kg/day, respectively, p<0.01). The roughage-supplement rates of the animals were higher in village A than in village B (5.0 vs. 2.2 in cattle and 9.3 vs. 1.8 in buffalo, p<0.01). The variance of feed constituents among the periods and between the villages induced different supplies of CP, NDF and TDN. The concentrations of CP and TDN in the cattle feed were higher in the pasturesufficient period than in the other periods (9.1% vs. 7.3% and 57.4% vs. 51.0%, respectively, p<0.01). The supplies of CP for cattle and buffalo, and of TDN for buffalo were lower in village A than in village B (7.5% vs. 8.7% and 6.6% vs. 9.1% [p<0.01], and 53.1% vs. 56.2% [p<0.05], respectively). The BCS, HG and BW of the animals were lower in village A than in village B (2.51 vs. 2.86, 156 cm vs. 170 cm and 300 kg vs. 318 kg, respectively in cattle, 2.83 vs. 4.00, 186 cm vs. 216 cm and 429 kg vs. 531 kg, respectively in buffalo, p<0.01). The cattle yielded more milk in the pasture-sufficient period than in the other periods (7.9 liters/day vs. 6.6 liters/day, p<0.01). The 305-day MY of cattle that calved in the fodder-shortage period was lower than that of cattle that calved in the other periods (1,900 liters vs. 2,251 liters, p<0.01). The MYs of cattle and buffalo were lower in village A than in village B (6.2 liters/day vs. 8.1 liters/day and 3.7 liters/day vs. 7.7 liters/day, respectively, p<0.01). The 305-day MY of cattle was lower in village A than in village B (1,935 liters vs. 2,409 liters, p<0.01). The concentrations of plasma albumin and urea nitrogen in cattle were lower in village A than in village B (3.2 g/dl vs. 3.4 g/dl [p<0.01] and 7.4 mg/dl vs. 10.2 mg/dl [p<0.05], respectively). The different supplies of CP, NDF and TDN among the periods and between the villages might have affected MY and nutritional status in cattle and buffalo. It was likely that the lower supplies of CP and TDN for cattle that calved in the fodder-shortage period and in village A lowered the 305-day MY of cattle.
-
Recent Progress of SHG Interference Microscope and Its Applications
Yoshiaki UESU,Hiroko YOKOTA,Noritaka Kato,Satoshi KAWADO 한국물리학회 2007 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.51 No.2I
A confocal second-harmonic-generation (SHG) interference microscope has newly been developed. The microscope enables us to obtain section images of 180 domain structures in ferroelectrics along the axial direction. SHG interference images of inverted domains in MgO:LiNbO3 are shown. The microscope is also equipped with a micro-Raman optical system, which gives SHG and Raman images at the same site of a specimen. An example for LiIO3/laponite nano-composites is shown.
-
QPOs in MHD Accretion Flows around Black Holes
Yoshiaki Kato 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.4
We review a recent study of the oscillations in three-dimensional magnetohydrodynamic (MHD) accretion °ows around black holes. We .nd that the distribution of the oscillations is changed at the resonant radius where the ratio of the Keplerian frequency to the epicyclic frequency is close to 2. A pair of quasi-periodic oscillations (twin QPOs) are excited in that region. The power spectrum density (PSD) shows that the lower peak frequency corresponds to the Keplerian frequency while the upper peak frequency corresponds to the sum of the Keplerian and the epicyclic frequencies. The results provide the .rst direct evidence for the excitation of resonant disk oscillation in MHD accretion °ows.퐻5X.
-
Generalized Vehicle Routing Problem for Reverse Logistics Aiming at Low Carbon Transportation
Yoshiaki Shimizu,Tatsuhiko Sakaguchi 대한산업공학회 2013 Industrial Engineeering & Management Systems Vol.12 No.2
Deployment of green transportation in reverse logistics is a key issue for low carbon technologies. To cope with such logistic innovation, this paper proposes a hybrid approach to solve practical vehicle routing problem (VRP) of pickup type that is common when considering the reverse logistics. Noticing that transportation cost depends not only on distance traveled but also on weight loaded, we propose a hierarchical procedure that can design an economically efficient reverse logistics network even when the scale of the problem becomes very large. Since environmental concerns are of growing importance in the reverse logistics field, we need to reveal some prospects that can reduce CO2 emissions from the economically optimized VRP in the same framework. In order to cope with manifold circumstances, the above idea has been deployed by extending the Weber model to the generalized Weber model and to the case with an intermediate destination. Numerical experiments are carried out to validate the effectiveness of the proposed approach and to explore the prospects for future green reverse logistics.
ScienceON연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
