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Stability Analysis of Nonlinear Systems via Locally Defined Density Functions
Izumi Masubuchi 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
This paper considers local stability analysis of nonlinear systems with deriving a positively in variant set based on Rantzer’s stability theory byuing density functions. We define notion of locally defined density functions around an equilibrium that give monotonously increasing positive measures near the equilibrim of an onlinear system. Under several assumptions, it is shown that some level set of alocally defined density function is apositively in variant set where almost all of the system trajectories converge to the equilibrium.
Izumi Yahata,Tetsuaki Kawase,Hiromitsu Miyazaki,Yusuke Takata,Daisuke Yamauchi,Kazuhiro Nomura,Yukio Katori 대한이비인후과학회 2015 Clinical and Experimental Otorhinolaryngology Vol.8 No.3
Objectives. To examine the relationship between speech intelligibilities among the similar level of hearing loss and threshold elevation of the auditory brainstem response (ABR). Methods. The relationship between maximum speech intelligibilities among similar levels of hearing loss and relative threshold elevation of the click-evoked ABR (ABR threshold – pure tone average at 2,000 and 4,000 Hz) was retrospectively reviewed in patients with sensorineural hearing loss (SNHL) other than apparent retrocochlear lesions as auditory neuropathy, vestibular schwannoma and the other brain lesions. Results. Comparison of the speech intelligibilities in subjects with similar levels of hearing loss found that the variation in maximum speech intelligibility was significantly correlated with the threshold elevation of the ABR. Conclusion. The present results appear to support the idea that variation in maximum speech intelligibility in patients with similar levels of SNHL may be related to the different degree of dysfunctions of the inner hair cells and/or cochlear nerves in addition to those of outer hair cells.
The Perception on the Islam in Modern Japanese Society
IZUMI Kazue 한국글로벌문화학회 2015 글로벌문화연구 Vol.6 No.2
That perception of the Islam, which is based mainly on the media coverage of the extreme Islamist or Jihadist groups, is at all time strong since IS killed two Japanese hostages in January and February 2015. However, the image of the Islam among the ordinary Japanese is not changeless. It has been made from a lot of different elements; realities found in the Islamic society, media reports covering the Middle East, education in the school and university based on the academic achievement of the Middles East and Islamic studies, exchanges with the region through the diplomacy, trade, culture, tourism, and so on. Therefore, the image changes according as changes of those elements. The results of those surveys were worse than the conductors’ pre-estimate. Major proportion of the students who answered the ‘backward’, ‘rigid doctrine’, ‘intolerant’, ‘unfree’, ‘aggressive, horrible’, ‘mysterious’, and ‘strange customs’ as factors that the word of Islam.
Izumi Mori 서울대학교 교육연구소 2010 Asia Pacific Education Review Vol.11 No.1
Prodigious growth in out-of-school, private educational activities meant to supplement formal schooling is observed worldwide. Why has shadow education expanded, and what does it mean for the future of education in postmodern society? Illustrated by the historical development and recent changes in the Japanese shadow education industry, it is suggested that shadow education follows the institutional logic of formal education. And as this logic has become more homogenized and expansive globally, so have the forms and goals of shadow education. Because of its focus on learning and achievement, which are central to formal education, it is predicted that shadow education will be increasingly incorporated into the broader culture of education.
Effect of Rumen Protected Methionine on Lactational Performance of Dairy Cows
Izumi, K.,Kikuchi, C.,Okamoto, M. Asian Australasian Association of Animal Productio 2000 Animal Bioscience Vol.13 No.9
Thirty-six Holstein dairy cows were used to evaluate the effect of a rumen protected methionine supplement (RPMet). The cows were divided into two groups of 18 each (control/experimental). The experimental group was given 15 g/d of RPMet (Mepron $^{(R)}$M85, Degussa) from the 4th to the 26th week postpartum. All cows were fed a similar amount of forage including alfalfa silage, corn silage and timothy silage. Concentrate mixture was offered in proportion to the milk yield of each cow. Sufficiency of major metabolizable AAs was checked. Milk yield and milk composition was monitored for each individual cow. A metabolic profile test (MPT) was carried out at the 7th, 11th and 21st week postpartum. Without supplement, both methionine and leucine fell short of the daily requirement. Supplementation with 15 g/d RPMet was calculated to be within a sufficient margin of safety. Milk yield tended to remain higher in the supplemented group than in the controls during supplementation with RPMet. The differences in weekly milk production at the 17th, 18th, 19th and 22nd weeks postpartum were significantly high in the RPMet group (p<0.05). The average 305-d milk yield and the percentages of milk fat, milk protein and solids-not-fat were not affected by the treatment. No differences were observed in either the somatic cell count in the milk or the reproductive status. Judging from MPT, all the cows were in good health during lactation.