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( M. Tamaki ),( T. Ishibashi ),( T. Yamazaki ),( S. Konda ),( K. Kono ),( S. Okada ),( T. Tomita ) 대한슬관절학회 2024 대한슬관절학회지 Vol.36 No.-
Introduction Patient satisfaction is an important outcome of total knee arthroplasty (TKA). However, we cannot predict how and why patients are satisfied or dissatisfied with TKA. The hypothesis of this study was that patient-reported outcomes (PROs) correlate with in vivo kinematics after TKA. Materials and methods One hundred knees were analyzed after TKA. The in vivo kinematics of deep knee bending motion were estimated from single-plane fluoroscopy using a two-to-three-dimensional registration technique. Active knee flexion, femoral rotation and rollback were evaluated. The PROs were obtained after surgery using the 2011 Knee Society Scoring System (KSS), and their relationship with in vivo kinematics was determined. Results The average minimum and maximum flexion were -2.4 ± 7.3° and 113.2 ± 13.6°, respectively. The average femoral rotation was 7.4 ± 3.4°, and the average medial and lateral rollback were 2.4 ± 4.8 mm and 7.2 ± 5.6 mm, respectively. The multiple regression analysis revealed that the maximum flexion angle significantly contributed to symptoms and satisfaction. In addition, lateral rollback was also a significant factor affecting patient satisfaction. Lateral rollback and lateral Anterior-Posterior (AP) position at maximum flexion were correlated with the maximum flexion angle, whereas femoral rotation did not correlate with flexion angles. Conclusions Maximum flexion and lateral rollback are important for better patient satisfaction after TKA. To obtain the maximum flexion angle, it was necessary to perform the normal kinematic pattern with a large amount of lateral rollback.
Yanagisawa, Y.,Suetomi, Y.,Piao, R.,Yamagishi, K.,Takao, T.,Hamada, M.,Saito, K.,Ohki, K.,Yamaguchi, T.,Nagaishi, T.,Kitaguchi, H.,Ueda, H.,Shimoyama, J.,Ishii, Y.,Tomita, M.,Maeda, H. The Korea Institute of Applied Superconductivity a 2018 초전도와 저온공학 Vol.20 No.2
The present article briefly overviews the plan for a new project on joint technology for HTS wires/cables and describes the development plan for the world's highest field NMR magnet, which is a major development item in the project. For full-fledged social implementation of superconducting devices, high temperature superconducting (HTS) wire is a key technology since they can be cooled by liquid nitrogen and they can generate a super-high magnetic field of >>24 T at liquid helium temperatures. However, one of the major drawbacks of the HTS wires is their availability only in short lengths of a single piece of wire. This necessitates a number of joints being installed in superconducting devices, resulting in a difficult manufacturing process and a large joint resistance. In Japan, a large-scale project has commenced, including two technical demonstration items: (i) Development of superconducting joints between HTS wires, which are used in the world's highest field 1.3 GHz (30.5 T) NMR magnet in persistent current mode; the joints performance is evaluated based on NMR spectra for proteins. (ii) Development of ultra-low resistive joints between DC superconducting feeder cables for railway systems. The project starts a new initiative of next generation super-high field NMR development as well as that of realization of better superconducting power cables.
Progress in development of neutron energy spectrometer for deuterium plasma operation in KSTAR.
Tomita, H,Yamashita, F,Nakayama, Y,Morishima, K,Yamamoto, Y,Sakai, Y,Cheon, M S,Isobe, M,Ogawa, K,Hayashi, S,Kawarabayashi, J,Iguchi, T American Institute of Physics 2014 Review of scientific instruments Vol.85 No.11
<P>Two types of DD neutron energy spectrometer (NES) are under development for deuterium plasma operation in KSTAR to understand behavior of beam ions in the plasma. One is based on the state-of-the-art nuclear emulsion technique. The other is based on a coincidence detection of a recoiled proton and a scattered neutron caused by an elastic scattering of an incident DD neutron, which is called an associated particle coincidence counting-NES. The prototype NES systems were installed at J-port in KSTAR in 2012. During the 2012 and 2013 experimental campaigns, multiple shots-integrated neutron spectra were preliminarily obtained by the nuclear emulsion-based NES system.</P>
Acid-suppressive medication, a possible risk factor for asthma
( Yasuhiro Tomita ),( Yuma Fukutomi ),( Mari Irie ),( Kazuhiro Azekawa ),( Yoichi Nakamura ),( Chiharu Okada ),( Terufumi Shimoda ),( Miku Sano ),( Katsuyuki Kojima ),( Yoshinori Hasegawa ),( Masami T 대한결핵 및 호흡기학회 2019 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.127 No.-
Background: Acid-suppressive medication (ASM), such as proton pump inhibitors and histamine 2 receptor antagonists, are commonly used. However, concerns have been raised that they might cause allergic diseases, including asthma. We investigated the relationship between the use of ASM and the subsequent incidence of asthma. Methods: A retrospective cohort study was conducted using the data from health insurance claims and results of specific health checkups for metabolic syndrome from 3 health insurance societies April 2011-thru-March 2015. Among the 40-64-year-old subjects without asthma (5,915 men, 3,973 women), logistic regression analyses were performed to investigate the relationship between the use of ASM (stratified as none, 1-59 days/year, ≥60days/year) and subsequent incidence of asthma. The adjustment was made for age, smoking status, BMI, and registered “allergic rhinitis” and “reflux esophagitis” diagnoses in multivariate logistic regression analyses. Results: 213 (3.6%) men (median 47 [IQR, 11] years old) and 211 (5.3%) women (median 47 [IQR, 9]) developed asthma. In the whole cohort, both short- and long-term use of ASM was significantly related to asthma incidence (adjusted Odds Ratio 1.89 [95% CI, 1.40-2.57]; P <0.001, aOR 1.82 [95% CI, 1.15-2.89]; P = 0.01, respectively). In men, only short-term use of ASM was significantly related to asthma incidence (aOR 1.87 [95% CI, 1.21-2.92]; P = 0.005). In women, both short- and long-term use was significantly related to asthma incidence (aOR 1.92 [95% CI, 1.26-2.92]; P = 0.002, aOR 2.85 [95% CI, 1.50-5.40]; P = 0.001, respectively). Longer duration of ASM use was also significantly associated with asthma incidence after adjusting for confounders (P-values for trends <0.001 in women and the whole cohort). Results in subjects without registered “reflux esophagitis” were almost the same as in the main analyses. Conclusions: Acid- suppressive medication could be a risk factor for the subsequent incidence of asthma.
N. UMEHARA,T. TOKOROYAMA,H. TOMITA,Y. TAKENOSHITA 한국트라이볼로지학회 2002 한국트라이볼로지학회 학술대회 Vol.2002 No.10
During the sliding between a-CNx and Si₃N₄, applying nitrogen as environmental gas provided very low friction as the level of 0.01 in friction coefficient. In order to know the effect of the running-in process on the reduction of the friction, the effect of surface roughness of mating surface on friction was investigated. It was shown that smooth surface in wear scar of ball provided low friction coefficient. Friction coefficient after running-in was proportional to the Ry value of wear scar of ball. Also smooth thin transferred layer was observed on the wear scar of balls with an AFM after sliding test. Those results showed the smoothing of wear scar, of ball, the generating of the transferred layer from CNx was necessary for low friction.
Yamada, M.,Hasebe, T.,Tomita, Y.,Onizawa, T. Techno-Press 2008 Interaction and multiscale mechanics Vol.1 No.4
This paper examined the stability of high-dense dislocation substructures (HDDSs) associated with martensite laths in High Cr steels supposed to be used for FBR, based on a series of dislocation dynamics (DD) simulations. The DD simulations considered interactions of dislocations with impurity atoms and precipitates which substantially stabilize the structure. For simulating the dissociation processes, a point defect model is developed and implemented into a discrete DD code. Wall structure composed of high dense dislocations with and without small precipitates were artificially constructed in a simulation cell, and the stability/instability conditions of the walls were systematically investigated in the light of experimentally observed coarsening behavior of the precipitates, i.e., stress dependency of the coarsening rate and the effect of external stress. The effect of stress-dependent coarsening of the precipitates together with application of external stress on the subsequent behavior of initially stabilized dislocation structures was examined.
Ichiyanagi, K.,Sato, T.,Nozawa, S.,Kim, K. H.,Lee, J. H.,Choi, J.,Tomita, A.,Ichikawa, H.,Adachi, S.,Ihee, H.,Koshihara, S. International Union of Crystallography 2009 Journal of synchrotron radiation Vol.16 No.3
<▼1><P>A new method of time-resolved solution scattering utilizing X-ray multilayer optics is presented.</P></▼1><▼2><P>100 ps time-resolved X-ray solution-scattering capabilities have been developed using multilayer optics at the beamline NW14A, Photon Factory Advanced Ring, KEK. X-ray pulses with an energy bandwidth of Δ<I>E</I>/<I>E</I> = 1–5% are generated by reflecting X-ray pulses (Δ<I>E</I>/<I>E</I> = 15%) through multilayer optics, made of W/B<SUB>4</SUB>C or depth-graded Ru/C on silicon substrate. This tailor-made wide-bandwidth X-ray pulse provides high-quality solution-scattering data for obtaining photo-induced molecular reaction dynamics. The time-resolved solution scattering of CH<SUB>2</SUB>I<SUB>2</SUB> in methanol is demonstrated as a typical example.</P></▼2>