Chiba Institute of Technology

About: Chiba Institute of Technology is a education organization based out in Narashino, Japan. It is known for research contribution in the topics: RNA & Magnet. The organization has 2663 authors who have published 4999 publications receiving 56870 citations. The organization is also known as: Chiba kōgyō daigaku & Kōa Institute of Technology.

Glassy Dynamics and Heterogeneity of Polymer Thin Films

Abstract: We review our recent studies on glassy dynamics and glass transition of polymer thin films using neutron and X-ray reflectivity and inelastic neutron techniques. In the last decade extensive studies have been performed on polymer thin films to reveal very interesting but unusual properties such as reduction in the glass transition temperature T g with film thickness and negative thermal expansivity for thin films below about 25 nm, and often some contradictory experimental results have been reported. It is believed that a key to solve the controversial situation is to disclose heterogeneous structure or multi-layer structure in polymer thin films. In the review, therefore, we summarize our recent experimental results by neutron and X-ray reflectivity and inelastic neutron scattering, focusing on the dynamic heterogeneity in polymer thin films.

Body Surface Laplacian Mapping in Patients with Left or Right Ventricular Bundle Branch Block

Abstract: Body surface Laplacian maps (BSLMs) have been previously reported to provide enhanced capability in localizing and resolving multiple spatially separate myocardial events However, only a few studies have been reported on the clinical applications of BSLM To test the clinical utility of BSLMs, BSLMs and body surface potential maps (BSPMs) during ventricular depolarization for complete right or left ventricular bundle branch block (CRBBB or CLBBB) were studied in ten patients in each group As a control group, ten healthy subjects were also studied using the same procedure One hundred and twenty-eight electrodes were placed uniformly over the entire chest and back of the subjects BSLMs were computed from recorded potentials, using a numerical algorithm The BSLMs showed multiple and more localized positive and negative activities compared with the BSPMs In healthy subjects, the BSLMs showed multiple areas of positive activity overlying the RV, LV, and the RV outflow, and negative activity corresponding to RV free-wall breakthrough and LV anterolateral breakthrough sites, whereas the BSPMs could not separate RV and LV activities In the patients with CRBBB, the BSLMs showed more localized areas of activity corresponding to the LV apex breakthrough and LV lateral breakthrough, and separated LV lateral and posterior activation In the patients with CLBBB, the BSLMs showed multiple RV activation, and propagating activation of LV from lateral to posterior The BSLMs appear to provide enhanced capability in detecting multiple ventricular electrical events associated with normal and abnormal conduction and a more detailed activation sequence of both ventricles in healthy subjects and in the patients with CRBBB and CLBBB BSLM may provide an important alternative to other imaging modalities in localizing cardiac electrical activity noninvasively

Pedometer-determined physical activity among youth in the Tokyo Metropolitan area: a cross-sectional study

Abstract: Providing large-scale descriptive data of objectively measured physical activity in youth is informative for practitioners, epidemiologists, and researchers. The purpose of this study was to present the pedometer-determined physical activity among Japanese youth using the Tokyo Metropolitan Survey of Physical Fitness, Physical Activity and Lifestyle 2011. This study used a school-based survey. The Tokyo Metropolitan Board of Education originally collected pedometer-determined steps per day in the fall of 2011. Data were collected from 15,471 youth aged 6 to 18 years living in Tokyo. Participants were asked to wear pedometers for 14 consecutive days, and daily steps logged in the final 7 days were selected for this analysis. At the primary and junior high school levels, boys (12,483 and 9476, respectively) had a significantly higher mean number of steps per day than did girls (10,053 and 8408, respectively). There was no significant difference in the mean number of steps per day between the sexes at the high school level. Mean steps per day decreased consistently with age and grade level; the lowest overall steps per day was observed in the last year of junior high school, although there was a slight increase in the subsequent year, the first year of high school. This study demonstrates a trend toward reduced physical activity with age in Japanese youth and a substantial difference in the number of steps per day between boys and girls in Tokyo. The age-related reduction in steps per day was greater in boys because they attained a higher peak value prior to this reduction, and sex-related differences in the step count disappeared in high school students.

The origin of the coercivity in Co-Zr system alloys

Abstract: The phases and magnetic properties of Co-Zr melt-spun ribbons were studied to investigate the origin of the hard magnetic phase in Co-Zr system alloys. The Co-Zr melt-spun ribbons with coercivities of 1.5-2.7 kOe consisted of a metastable Co/sub 5/Zr phase together with fcc-Co and Co/sub 23/Zr/sub 6/ phases. Annealing at relatively high temperatures (700-800/spl deg/C resulted in the formation of an equilibrium Co/sub 11/Zr/sub 2/ phase). However, the annealed ribbons with the Co/sub 11/Zr/sub 2/ phase showed a lower coercivity than those without the Co/sub 11/Zr/sub 2/ phase. The hard magnetic phase of the Co-Zr system alloys was believed to be the metastable Co/sub 5/Zr phase.