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단기간 크레아틴 섭취가 태권도 선수의 신체조성, 등속성 근력 및 혈액성분에 미치는 영향
오세용,김창은,김의영 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.20 No.1
The purpose of this study was to examine the effect of short-term creatine intake on constitution, isokinetic muscular power and constituent parts of the blood among taekwondo players. After 14 taekwondo players were divided into two groups, one group took creatine for six days and the other took placebo for the same short period of time. This experiment was conducted during training period, and then their constitution, isokinetic muscular power, blood creatinine and inorganic phosphate were measured. The findings of this study were as follows: 1. As for constitution, there was no significant disparity in weight, the amount of muscle, body fat volume and body fat rate between the creatine group and the placebo group. 2. Concerning isokinetic muscular power, the creatine group made a significant progress in set total work(J) and endurance rate(%) after the two groups were engaged in maximal flexion/extension exercise(180˚/s) 30 times. 3. When the constituent parts of the blood was gauged, the creatine group showed a significant increase in creatinine at rest and 30 minutes after recovery(p<.05), and the placebo group showed a significant reduction in creatinine at rest and immediately after workout(p<.05). In the former group, there was no change in inorganic phosphate, but the placebo group showed a significant increase at rest, immediately after workout and 30 minutes after recovery(p<.05). The above-mentioned findings suggested that the six-day creatine intake had an effect on the muscular power of the taekwondo players and their constituent parts of the blood, but it gave no positive impact on their physical constitution. Therefore, short-term creatine intake seemed to contribute to enhancing motor skills.
Reconstructing Individual Hand Models from Motion Capture Data
Yui Endo,Mitsunori Tada,Masaaki Mochimaru (사)한국CDE학회 2013 한국CAD/CAM학회 국제학술발표 논문집 Vol.2010 No.8
In this paper, we propose a new method of reconstructing the hand models for individuals, which include the link structure models, the homologous skin surface models and the homologous tetrahedral mesh models in a reference posture. As for the link structure model, the local coordinate system related to each link consists of the joint rotation center and the axes of joint rotation, which can be estimated based on the trajectories of optimal markers on the relative skin surface region of the subject obtained from the motion capture system. The skin surface model is defined as a three-dimensional triangular mesh, obtained by deforming a template mesh so as to fit the landmark vertices to the relative marker positions obtained motion capture system. In this process, anatomical dimensions for the subject, manually measured by a caliper, are also used as the deformation constraints.
Assessing the displacement effect of exports with gravity trade model
Yui-Yip Laua,Man-Hin Chanc,Hong-Oanh Nguyen 인하대학교 정석물류통상연구원 2017 JOURNAL OF INTERNATIONAL LOGISTICS AND TRADE Vol.15 No.1
This paper employs the gravity model to investigate how the growth of China’s textile and clothing (T&C) exports is displacing the exports of other Asian developing countries over the 1990-2015 period. Aggregate analyses were undertaken, and the endogeneity of Chinese exports were accounted by applying instrumental variables with country fixed effects. It was found that there was a negative impact of China’s emergence on T&C exports on other Asian developing countries. We further explored whether such displacement effect varies across Asian countries and the results showed that a more pronounced effect was found in low-income countries than high-income ones. Our findings suggest that the export competitiveness of China’s neighbors, i.e. both more and less developed Asian countries, are affected by the emergence of China in T&C Trade. The implications of China’s One Belt, One Road initiative are also discussed.
Yui-su Youk,Cong-yi Zhang,Sung-Ho Kim 한국지능시스템학회 2009 INTERNATIONAL JOURNAL of FUZZY LOGIC and INTELLIGE Vol.9 No.3
An efficient fault diagnosis system is needed for industry because it can optimize the resources management and improve the performance of the system. In this study, a fault diagnostic system is proposed for rotating machine using wavelet packet transform (WPT) and elman neural network (ENN) techniques. In most fault diagnosis for mechanical systems, WPT is a well-known signal processing technique for fault detection and identification. In previous work, WPT can improve the continuous wavelet transform (CWT) used over a longer computing time and huge operand. It can also solve the frequency-band disagreement by discrete wavelet transform (DWT) only breaking up the approximation version. In the experimental work, the extracted features from the WPT are used as inputs in an Elman neural network. The results show that the scheme can reliably diagnose four different conditions and can be considered as an improvement of previous works in this field.
Yui Kishimoto,Naoki Okano,Ken Ito,Kensuke Takuma,Seiichi Hara,Susumu Iwasaki,Kensuke Yoshimoto,Yuto Yamada,Koji Watanabe,Yusuke Kimura,Hiroki Nakagawa,Yoshinori Igarashi 대한소화기내시경학회 2022 Clinical Endoscopy Vol.55 No.2
Background/Aims: Endoscopic evaluation of intraductal papillary mucinous neoplasms (IPMNs) is useful in determining whetherthe lesions are benign or malignant. This study aimed to examine the usefulness of peroral pancreatoscopy (POPS) in determiningthe prognosis of IPMNs. Methods: POPS with videoscopy was performed using the mother–baby scope technique. After surgery, computed tomography/magnetic resonance cholangiopancreatography or ultrasonography and blood tests were performed every 6 months during thefollow-up. Results: A total of 39 patients with main pancreatic duct (MPD)–type IPMNs underwent POPS using a videoscope, and theprotrusions in the MPD were observed in 36 patients. The sensitivity and specificity of cytology/biopsy performed at the time ofPOPS were 85% and 87.5%, respectively. Of 19 patients who underwent surgery, 18 (95%) patients had negative surgical margins and1 (5%) patient had a positive margin. Conclusions: In IPMNs with dilatation of the MPD, POPS is considered effective if the lesions can be directly observed. Thediagnosis of benign and malignant lesions is possible depending on the degree of lesion elevation. However, in some cases, slightlyelevated lesions may increase in size during the follow-up or multiple lesions may be simultaneously present; therefore, carefulfollow-up is necessary.
M¨ossbauer Spectroscopy of Fe-doped Valence-fluctuating α-YbAlB4
Yui Sakaguchi,Shugo Ikeda,Hisao Kobayashi,Kentaro Kuga,Keita Sone,Satoru Nakatsuji 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.12
The magnetic properties of high-quality 25 at.% Fe doped α-YbAlB4 with an orthorhombicPbam structure were investigated by using magnetization measurements and 57Fe M¨ossbauer spectroscopy. The temperature dependence of the magnetization along the a-axis showed anomaliesat TN2 7.7 K and TN1 10.4 K. Broadenings of the peaks in the M¨ossbauer spectrum wereobserved at temperatures below 6 K, which were due to the magnetic hyperfine fields transferredfrom the Yb magnetic moments. The evaluated transferred magnetic hyperfine field almost disappearsaround TN2. The anomalous temperature dependence of the transferred magnetic hyperfinefield reveals that the magnetic structure and the ordered magnetic moments of the Yb ions showcomplex temperature dependences at temperatures below TN1.
Intelligent Data Reduction Algorithm for Sensor Network based Fault Diagnostic System
Yui-su Youk,Sung-Ho Kim,Young-Hoon Joo 한국지능시스템학회 2009 INTERNATIONAL JOURNAL of FUZZY LOGIC and INTELLIGE Vol.9 No.4
In the modern life, machines are used for various areas in industries as the advance of science and industrial development has proceeded. In many machines, the rotating machines play an important role in many processes. Therefore, the development of fault diagnosis and monitoring system for rotating machines is required. An ubiquitous sensor network (USN) is a combination of the key computer science and engineering area technology including the wireless network, embedded system hardware and software, communication, real-time system, etc. It collects environmental information to realize a variety of functions. In this work, a data reduction algorithm for USN based remote fault diagnostic system which can be easily applied to previously built factories is proposed. To verify the feasibility of the proposed scheme, some simulations and experiments are executed.