Nagano Prefectural College

Nagano-shi, Japan

Nagano Prefectural College

Nagano-shi, Japan

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Mori R.,Nagano Prefectural College | Yamaoka T.,Wakayama University
ACHI 2014 - 7th International Conference on Advances in Computer-Human Interactions | Year: 2014

The purpose of this paper is to provide a measurement of user's thought process after discussing the experiment with "degree of formed mental model", which involves a logical thinking. We studied 42 people based on questionnaire to measurement mental models. This method helped understanding the potential effectiveness of mental model measurement. Copyright © IARIA, 2014.


Kato M.,Waseda University | Sato T.,Jissen Women's University | Shimodaira Y.,Nagano Prefectural College
Proceedings of the International Conferences on Interfaces and Human Computer Interaction 2015, IHCI 2015, Game and Entertainment Technologies 2015, GET 2015 and Computer Graphics, Visualization, Computer Vision and Image Processing 2015, CGVCVIP 2015 - Part of the Multi Conference on Computer Science and Information Systems 2015 | Year: 2015

Motion repeatability is one of the required skills for any sports including tennis. One of the reasons why expert tennis players can accurately serve the ball to another side is their motion repeatability. On the other hand, however the novice players can luckily serve the ball, they are required to practice again and again to repeat the motion. The reliable criterion by the objective numerical indicator is needed for training and evaluation of motion repeatability. In this study, the method of numerical evaluation of motion repeatability would be developed by a motion capture system. The correlation coefficients of each segment angular fluctuation on the serving motions were validated as the criterion for motion repeatability. 17 sensors measure three-dimensional 23 segments and 22 joints angle fluctuations during the two seconds around the ball impact. Three experienced tennis players and three novice players tried to serve ten balls by right arms. The results of the experiments indicated that the repeatability of upper body tends to be stable comparing arms and legs for all the subjects. The correlation coefficients of the fluctuations at the measurement joints that are far from the upper body tend to be low. Comparing the experts and the novices on the motion of the arms and legs, the novices have much variation of correlation coefficients of each motion than the experts. In addition, most of the motion fluctuations of novices are larger than those of the experts. This study revealed that the joint angular fluctuation would be able to be applied as a criterion of motion repeatability.


Kato M.,Waseda University | Kato M.,Nagano Prefectural College | Kato M.,Jissen Women's University | Kato M.,Nihon Taiiku Sangyo Co
Industrial Health | Year: 2014

Protecting children from injuries caused by fall accidents from playground equipment is important. Therefore, measures toward minimizing the risk of fall accident injuries are required. The risk of injury can be evaluated using ASTM F1292. In this test, G-max and the HIC are used to estimate the risk of injury. However, the measurement procedure is too complicated for application to a large number of installed equipment. F1292 requires simplified by reducing the number of phases, even with a small risk of loss in accuracy. With this in mind, this study proposes a shortened measurement procedure and a transformation equation to estimate the risk as same as F1292. As the result of experiments, it was revealed that G-max and the HIC values for both procedures linearly increase with drop height. The differences in outcomes between the regression equations of the standardized procedure and those of the shortened procedure can be used as a correction value. They can be added to the value measured by the shortened procedure. This suggests that the combination of the shortened procedure and transformation equation would be equivalent to F1292, with the advantage of being more easily and efficiently applied to the evaluation of installed playground equipment. © 2014 National Institute of Occupational Safety and Health.


Kato M.,Nagano Prefectural College | Shimodaira Y.,Nagano Prefectural College | Sato T.,Jissen Women's University
Proceedings of the IADIS International Conference Interfaces and Human Computer Interaction 2011, Part of the IADIS Multi Conference on Computer Science and Information Systems 2011, MCCSIS 2011 | Year: 2011

Number of elderly people who live alone or elderly only couples are going to increase as ratio of elderly people increase in Japan as same as the other developed countries. They often have trouble with their health which needs care by someone. However most of their families live away from them. In this study we tried to develop remote monitoring system by measurement of fixture movement at home to observe the elderly people's daily behavior for safety. Through eight days experiment at rural area in Nagano, Japan, the acceleration measurement system recorded the door movement to observe the inhabitant's characteristics. Extracted characteristics from the results has shown the inhabitant's behavior which can be used for criteria of their activities. Elderly people who live alone or elderly only couples will be able to be monitored their safety by this automatic confirming system without violation of the inhabitant's privacy. © 2011 IADIS.


Toida E.,Nagano Prefectural College | Tajima M.,Jissen Women's University
Nippon Shokuhin Kagaku Kogaku Kaishi | Year: 2015

The proximate composition (%) of Japanese walnut (Shinano) was determined to be as follows : crude protein, 13.6; crude fat, 67.5; carbohydrate, 14.3; ash, 1.7; and moisture, 2.9. 1-1-diphenyl-2-picrylhydrazyl radical scavenging activity was 186.2 and 144.8 μmol of Trolox equivalent per gram dry weight in Japanese and American walnuts, respectively, indicating that Japanese walnuts exhibit slightly stronger antioxidant capacity than American walnuts. The total polyphenol content was 2 202.3 and 1 855.0mg of gallic acid equivalent per 100 g dry weight in Japanese and American walnuts, respectively, indicating that Japanese walnuts have a slightly higher polyphenol content than American walnuts. The principal ellagitannin compounds were 445.7 and 473.5mg of ellagic acid equivalent 100 gram dry weight in Japanese and American walnuts, respectively, indicating that American walnuts have slightly higher ellagitannin content than Japanese walnuts. The results presented above indicate that polyphenolic compounds contribute to the antioxidant capacity. The data also suggest that the antioxidants in walnuts include both identified ellagitannins and unidentified polyphenolic compounds. The study also demonstrates differences in polyphenolic composition between Japanese and American walnuts, which reflect antioxidant capacity. These observations are likely related to differences between the two countries in cultivation region and horticultural practices, as well as genetic factors and post-harvest processing. © 2015, Japanese Society for Food Science and Technology.


PubMed | Red Cross, Hiroshima University, Nagano Prefectural College, Tokyo Women's Medical University and 5 more.
Type: | Journal: BioPsychoSocial medicine | Year: 2015

No epidemiologic survey examining eating disorders in Japan has been done at a national level since 1992. The prevalence of anorexia nervosa, as assessed by questionnaires to hospitals, is thought to be underestimated because patients with anorexia nervosa tend to avoid consultations. In conformity with the School Health and Safety Act of Japan, schools are required to have physicians perform a medical examination of students every year. The teachers in charge of health education and school physicians determine the height, weight, and health condition, and examine the medical records of each student. Therefore, we as members of the Survey Committee for Eating Disorders of the Japanese Ministry of Health, Labour, and Welfare conducted an epidemiologic survey using questionnaires sent to schools in seven prefectures to determine the current prevalence of anorexia nervosa among adolescents.We sent a questionnaire to elementary, junior high, and senior high schools. Questionnaires contained items on the number of students, patients with anorexia nervosa in each grade who were diagnosed by specialists, and students who the school physician strongly suspected to have anorexia nervosa but who did not undergo a clinical examination in a medical institution.We found patients of both sexes with anorexia nervosa aged 9-10 years in elementary schools. The point prevalence of anorexia nervosa for girls, including strongly suspected cases, in the three grades of junior high school and three grades of senior high school were 0-0.17%, 0-0.21%, 0.17-0.40%, 0.05-0.56%, 0.17-0.42% and 0.09-0.43%, respectively. We also confirmed a prominent sex difference in the prevalence of anorexia nervosa. The prevalence of boys was one third that of girls in some prefectures. One third to one half of diagnosed and strongly suspected students with anorexia nervosa had not received medical consultation or treatment.Although the prevalence of anorexia nervosa had regional differences in Japan, it has reached levels comparable to those in Western societies. Because no eating disorder center exists and the treatment environment is poor, national action to address this disease is a pressing need in Japan.


Tanaka N.,Shinshu University | Zhang X.,Shinshu University | Sugiyama E.,Nagano Prefectural College | Kono H.,Mochida Pharmaceutical Company Ltd | And 6 more authors.
Biochemical Pharmacology | Year: 2010

Eicosapentaenoic acid (EPA) in fish oil is known to improve hepatic steatosis. However, it remains unclear whether such action of EPA is actually caused by peroxisome proliferator-activated receptor α (PPARα) activation. To explore the contribution of PPARα to the effects of EPA itself, male wild-type and Ppara-null mice were fed a saturated fat diet for 16 weeks, and highly (>98%)-purified EPA was administered in the last 12 weeks. Furthermore, the changes caused by EPA treatment were compared to those elicited by fenofibrate (FF), a typical PPARα activator. A saturated fat diet caused macrovesicular steatosis in both genotypes. However, EPA ameliorated steatosis only in wild-type mice without PPARα activation, which was evidently different from numerous previous observations. Instead, EPA inhibited maturation of sterol-responsive element-binding protein (SREBP)-1 in the presence of PPARα through down-regulation of SREBP cleavage-activating protein and site-1 protease. Additionally, EPA suppressed fatty acid uptake and promoted hydrolysis of intrahepatic triglycerides in a PPARα-independent manner. These effects were distinct from those of fenofibrate. Although fenofibrate induced NAPDH oxidase and acyl-coenzyme A oxidase and significantly increased hepatic lipid peroxides, EPA caused PPARα-dependent induction of superoxide dismutases, probably contributing to a decrease in the lipid peroxides. These results firstly demonstrate detailed mechanisms of steatosis-ameliorating effects of EPA without PPARα activation and ensuing augmentation of hepatic oxidative stress. © 2010 Elsevier Inc.


Kido Y.,Kyoto Prefectural University | Shizuka F.,Nagano Prefectural College | Shimomura Y.,Nagoya University | Sugiyama T.,Mie University
Journal of Nutritional Science and Vitaminology | Year: 2013

Proteins form the most important structural component of cells that constitute the various types of tissue, such as muscle, skin, and bone. Proteins also function as enzymes and hormones to regulate various metabolic processes in the body. The estimated average requirement (EAR) of protein for both men and women who habitually consume mixed protein was evaluated as 0.72 g/kg body weight/d by nitrogen balance studies as the value to maintain nitrogen equilibrium with high quality protein, revised with digestibility of mixed protein in habitual food intake. The recommended intake of protein for infants is normally based on the adequate intake (AI) standard, which reflects the observed mean protein intake of infants fed principally with breast milk for up to 6 mo of age. The EAR of children aged 1-17 y was estimated by the factorial method, which adds the amount required for protein storage because of growth and protein requirement for maintenance. The EAR of protein in the elderly was calculated by meta-analysis, employing 144 data sets obtained from 5 published reports, with 60 subjects, and was found to be 0.85 g of habitual mixed protein/kg body weight/d. The tolerable upper intake level (UL) of protein must be established based on the health risk caused by excessive protein intake. However, no clear evidence to establish this value is available at present, and therefore, the UL of protein cannot be determined.


PubMed | Nagano Prefectural College
Type: Comparative Study | Journal: Journal of human ergology | Year: 2015

The purpose of this study is to suggest a numerical model for postural control ability variations in children, young adults and the elderlies. Three sensors were attached to the subjects bodies at the vertex, the iliospinale and the mid-patellar to measure three-dimensional acceleration at each point while subjects maintained a standing posture for two minutes. Variations in acceleration at the vertex differed among the three age groups. Most children subjects could not maintain the initial position during the trials, whereas the young adult subjects could maintain it. Most elderly subjects could maintain their lateral balance however it was difficult for them to maintain their anteroposterior balance. From the results of acceleration measurement, it is indicated that the scalar of the average acceleration vector at the vertex point could serve as a numerical criterion of postural control ability.


PubMed | Shinshu University, Nagano Prefectural College and U.S. National Institutes of Health
Type: Journal Article | Journal: Archives of toxicology | Year: 2016

It was reported that 2,4-dichlorophenoxyacetic acid (2,4-D), a commonly used herbicide and a possible endocrine disruptor, can disturb spermatogenesis, but the precise mechanism is not understood. Since 2,4-D is a weak peroxisome proliferator in hepatocytes and peroxisome proliferator-activated receptor (PPAR) is also expressed in Leydig cells, this study aimed to investigate the link between PPAR and 2,4-D-mediated testicular dysfunction. 2,4-D (130mg/kg/day) was administered to wild-type and Ppara-null mice for 2weeks, and the alterations in testis and testosterone/cholesterol metabolism in Leydig cells were examined. Treatment with 2,4-D markedly decreased testicular testosterone in wild-type mice, leading to degeneration of spermatocytes and Sertoli cells. The 2,4-D decreased cholesterol levels in Leydig cells of wild-type mice through down-regulating the expression of 3-hydroxy-3-methylglutaryl coenzyme A synthase 1 and reductase, involved in de novo cholesterogenesis. However, the mRNAs encoding the important proteins involved in testosterone synthesis were unchanged by 2,4-D except for CYP17A1, indicating that exhausted cholesterol levels in the cells is a main reason for reduced testicular testosterone. Additionally, pregnancy rate and the number of pups between 2,4-D-treated wild-type male mice and untreated female mice were significantly lower compared with those between untreated couples. These phenomena were not observed in 2,4-D-treated Ppara-null males. Collectively, these results suggest a critical role for PPAR in 2,4-D-induced testicular toxicity due to disruption of cholesterol/testosterone homeostasis in Leydig cells. This study yields novel insights into the possible mechanism of testicular dysfunction and male infertility caused by 2,4-D.

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