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Sonoko Mashimo,Naruto Yoshida,Ayaka Takegami,Yuki Warashina,Hitoshi Shiraki 대한운동학회 2019 아시아 운동학 학술지 Vol.21 No.2
[OBJECTIVES] To understand the condition of athletes engaged in daily sports activities, it is important to investigate the pain that many such athletes can experience as well as the pain that can be an initial symptom of injury. Although handball is a contact sport associated with frequent injuries, the actual nature of pain symptoms that develop has not been sufficiently studied, and the relationship between pain occurrence and athletes’ daily changing physical load remains unclear. This study aimed to clarify the nature of pain symptoms in handball players and examine the relationship between pain occurrence and physical load. [METHODS] This study involved a 12-month daily assessment of pain symptoms and physical load involving 11 university female handball players. Pain was examined in terms of body region and a pain severity score using a pain questionnaire, and physical load on handball was assessed based on playing hours, types of matches and training recorded by a video camera. [RESULTS] The total number of pains was 1698, and the pain incidence rate was 288.1 pains per 1000 player hours. In terms of body regions, the ankle (18.3%) was the most common, followed by the lower back (13.3%), foot (12.8%), Achilles tendon (9.2%), and thigh (8.9%). With regard to the relationship between pain and physical load, significant moderate or weak correlations were observed between handball (rs=0.657), training (rs=0.626), and on-court training (rs=0.591) and overall pain occurrences. In terms of body regions, the ankle and thigh, significant moderate or weak correlations were observed with respect to all categories in on-court training. [CONCLUSIONS] We found that pain occur frequently and athletes continue to compete in games despite experiencing pain. In addition, pain occurrence was related to physical load, indicating that the type of physical load depends on the body region.
Chan Hee Lee,Naruto Araki 한국문화재보존과학회 2019 보존과학회지 Vol.35 No.4
The stone lantern of the Damyang Gaeseonsaji temple site is a cultural heritage built during the Unified Silla period (AD 868). The reason for its value as a cultural property is due to wittern the background and the period created on inscription of the lamp stone engraved by letters. The stone lantern consists of two types of lithic tuffs for the 23 original properties, the replaced stones in 1991, and the biotite granite for its ground stones replaced in 2005. The lithic tuffs selected as the replacement parts in 1991 and 2017 have been examined and got to properties of hardly exposure moisture as well as very similar geochemical characteristics. There were various types of physical deterioration of the stone properties and structural cracks; in particular, on the northern side of the stylobates. Chemical and biological deterioration can be identified as black, white, and brown discolorations as well as by the presence of lichens, bryophytes, and herbaceous plants. In the evaluation of the physical properties of the stone lantern, the mean and maximum ultrasonic velocities were found to be similar in each direction. However, the lowest velocity on the east and south sides were found to be lower than those of other stone properties. It was found that physical damage to the stylobates resulted from water expansion in a freeze-to-thaw phenomena related to water content. Therefore, dismantling repair was carried out in the protection facility to restrict further water supply to the stone as much as possible.
Simulation and Analysis of Dynamics of the Force-free Control for Industrial Robot Arms
Achala Pallegedara,Yoshitaka Matsuda,Naruto Egashira,Takenao Sugi,Satoru Goto 제어로봇시스템학회 2012 제어로봇시스템학회 국제학술대회 논문집 Vol.2012 No.10
Simulation and analysis of the dynamic force-free control of robot arm with revolute joints are presented in this paper. Initially, modeling of dynamic force-free control method is described. Then simulation is carried out for single arm and two arm links robots by adopting Matlab/Simulink environment. The model characteristics of the force-free control is utilized to demonstrate the autonomous safety action being taken by the robot arm in particular instances such as; when the robot insisting on an undesirable operation or a collision with an obstacle or an unusual dragging along the working objects. Finally, simulation results are taken by adopting the force-free control on robot arms with industrial mechatronics controllers. Moreover, analysis of the force-free control is carried out by using real robot parameters throughout the simulations. Since the force-free control is about to deal with external forces given to the robot arm, it can be used to illustrate the cooperative control between a human and a robot arm by means of passive motion through external force.
Minakawa Yoichi,Miyazaki Shogo,Waki Hideaki,Yoshida Naruto,Iimura Kaori,Itoh Kazunori 사단법인약침학회 2022 Journal of Acupuncture & Meridian Studies Vol.15 No.2
Background: Exercise therapy is the first choice non-pharmacotherapeutic approach for musculoskeletal pain; however, it often interferes with the implementation and continuation of exercise due to fear-avoidance behaviors. Trigger point acupuncture (TrPAcp) has been reported to reduce musculoskeletal pain. Objectives: To examine the efficacy of exercise combined with TrPAcp compared to exercise alone for older patients with chronic low back pain (CLBP), the most common subjective symptom reported by old people of both sexes in Japan. Methods: In this single-center randomized controlled trial conducted at Teikyo Heisei University, 15 men and women aged ≥ 65 years with low back pain for at least 3 months who met the eligibility criteria were included. The Ex+TrPAcp group received exercise and trigger point acupuncture, while the Ex group received only exercise for 3 months. The main outcome, pain intensity, was measured using the numerical rating scale (NRS). Improvement was defined as a decrease in NRS of ≥ 2 or less than moderate (NRS < 4). Results: The analysis included 7 of 8 cases in the Ex+TrPAcp group and 7 of 7 cases in the Ex group. NRS improved in 6 of 7 and 1 of 7 patients in the intervention and control groups, respectively, with a significant difference between groups (p = 0.03, φ = 0.71). Regarding adverse events due to acupuncture, one patient (14.3%) complained of heaviness after acupuncture. Nothing specific was reported with exercise. Conclusion: Compared with Ex alone, Ex+TrPAcp may be more effective therapy for older people with CLBP who do not have an exercise habit.
Toxicity and Carcinogenicity of Dichlorodiphenyltrichloroethane (DDT)
Takanori Harada,Makio Takeda,Sayuri Kojima,Naruto Tomiyama 한국독성학회 2016 Toxicological Research Vol.32 No.1
Dichlorodiphenyltrichloroethane (DDT) is still used in certain areas of tropics and subtropics to control malaria and other insect-transmitted diseases. DDT and its metabolites have been extensively studied for their toxicity and carcinogenicity in animals and humans and shown to have an endocrine disrupting potential affecting reproductive system although the effects may vary among animal species in correlation with exposure levels. Epidemiologic studies revealed either positive or negative associations between exposure to DDT and tumor development, but there has been no clear evidence that DDT causes cancer in humans. In experimental animals, tumor induction by DDT has been shown in the liver, lung, and adrenals. The mechanisms of hepatic tumor development by DDT have been studied in rats and mice. DDT is known as a non-genotoxic hepatocarcinogen and has been shown to induce microsomal enzymes through activation of constitutive androstane receptor (CAR) and to inhibit gap junctional intercellular communication (GJIC) in the rodent liver. The results from our previously conducted 4-week and 2-year feeding studies of p,p"-DDT in F344 rats indicate that DDT may induce hepatocellular eosinophilic foci as a result of oxidative DNA damage and leads them to hepatic neoplasia in combination with its mitogenic activity and inhibitory effect on GJIC. Oxidative stress could be a key factor in hepatocarcinogenesis by DDT.
송현,제형곤,나루토 마쯔다,이재원,송명근,Song, Hyun,Je, Hyoung-Gon,Matsuda, Naruto,Lee, Jae-Won,Song, Meung-Gun 대한흉부심장혈관외과학회 2001 Journal of Chest Surgery (J Chest Surg) Vol.34 No.5
심장에서 발생하는 모셀혈관종은 극히 드문 양성 종양이다. 본원에서는 호흡곤란을 주소로 내원한 13세 남자 환자에서,심포음파상 중등도의 혈류 폐쇄를 초래하는 우심실내 종괴를 확인한 후, 우심방을 통해 완전 절제하여 조직검사상 모세 혈관종을 발견하였기에 문헌고찰과 더불어 증례보고하는 바이다.
Early Disease Detection of Bacterial Leaf Blight on Rice Plant by using Hyperspectral Imaging
( M Naufal Rauf Ibrahim ),( Takashi Okayasu ),( Atsushi Yoshimura ),( Yoshiyuki Yamagata ),( Naruto Furuya ),( Eiji Inoue ),( Yasumaru Hirai ),( Muneshi Mitsuoka ) 한국농업기계학회 2018 한국농업기계학회 학술발표논문집 Vol.23 No.1
In Southeast Asia, bacterial leaf blight (BLB) is one of the significant rice diseases that potentially causes productivity loss up to 50%. The early stage disease detection contributes to prevent the serious crop damage due to the disease outbreak. The hyperspectral imaging provides an extension of our vision by capturing the near infrared (NIR) region at 700-1000 nm which is the outside of visible light (VIS) region at 400-700 nm. In this study, the possibility of early stage disease detection method of BLB on rice plant was investigated in captured hyperspectral images with 40-50 cm from the top of rice plant. For early disease setting, the hyperspectral images for both the healthy and infected single leaf of the rice plants, both were taken from 2 days post-inoculation when the symptom had not been shown yet. The possible sensitive bands were explored from VIS to NIR and chosen by applying the principal component analysis (PCA) on reflectance value of the healthy and infected leaves using 400-850 nm. The PCA result provided that there several ranges of wavelength have high correlation with the disease development on early stage and found that the ratio of orange-red color (605-640 nm) and red edge (690-720 nm) has the highest possibility to detect the BLB.