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강대웅,정지용,윤나라,안치용,김종오,신병철,정종훈,김현리 朝鮮大學校 附設 醫學硏究所 2006 The Medical Journal of Chosun University Vol.31 No.2
Background: Some cases of QT interval, corrected QT interval (QTc), QT dispersion (QTd) and corrected QT dispersion (QTcd) have been reported in ESRD, but these results are variable and the influence of a hemodialysis is still controversial, In this study, we investigated the effect of hemodialysis on QT and QTc interval and QT and QTc dispersion in patients with ESRD 15 min before and 15 minute after each hemodialysis. Methods: Sixty-seven patients with ESRD (men 33 & women 34) on three-times stable hemodialysis (>3 months) were randomly enrolled. Fifty control subjects with a similar age and normal renal function were enrolled from this hospital. Routine biochemical studies were measured pre- and post dialysis, at the time of the ECG. Plasma Na+, K+, BUN, creatinine, ionized calcium and phosphate were checked. Twelve-lead electrocardiographs were performed at 10㎜/mv and 50㎜/s using a HewIett-Packard Pagewriter 100, before and after a single hemodialysis session.The QT interval was measured from the onset of the QRS complex to the end of the T wave. If the end of the T wave was not clear in a particular lead then it was excluded from analysis. When U waves were present, the end of the T wave was taken as the nadir between the T and U waves. Each QT interval was corrected for heart rate using Bazett's formula (QTc==QT/√(RR)) (ms). The difference between maximal and minimal QT interval duration was defined as QT dispersion (QTd) in each of the 12 leads. Result: This study demonstrates that QT, QTd, QTcd is higher in hemodialysis patients compared with control subjects, and QT and QTd rise postdialysis to levels comparable to those seen acutely following myocardial infarction, when patients are at greatly increased risk of potentially fatal ventricular arrhythmias, Conclusions: QT interval and QT dispersion, markers of risk for arrhythmias and sudden death, are elevated in hemodialysis patients, and rise postdialysis. QT interval and QT dispersion is an easily obtainable, noninvasive, simple, inexpensive, and widely available method of risk stratification in uremic patients receiving chronic dialysis. Additional studies are needed to clarity whether increased postdialysis QT dispersion results in an increased occurrence of arrhythmias.
강지용 濟州大學校 亞熱帶農業硏究所 1995 亞熱帶農業硏究 Vol.12 No.-
The overall objective of this research is to accomplish the future image of Cheju agriculture in the 21st century by carrying forward reorganizing the production field, composing the balanced system of combined pooducrion, and constructing the composite supply site for chemical-free agricultural products. Strategies on the direction of development for each crop are as follows: 1) to establish the promising kingdom of citrus in an era of internalization, 2) to build up the livestock management pursuing low cost, high quality, and high efficiency, 3) to construct the composite whole year supply site for fresh vegetables, having strong competitiveness between areas of production, and 4) to construct the composite whole year supply site for high quality flowers.
姜志勇 濟州大學校 亞熱帶農業硏究所 1985 亞熱帶農業硏究 Vol.2 No.-
As economic development continues steadily,it varies not only the production of agricultural products but also the consumption patterns of agricultural products. If this is considered seriously, it is necessary to be concerned with the marketing structure of agricultural products in order to efficiently deal with the products of agriculture and to meet the increasing demand. If the demand and the supply of agricultural products is to change without any interruption, it must be based upon the modernization of agricultural marketing patterns, which have to be able to meet the needs, satisfying the economic efficiency of the marketing organization agricultural products and the marketing function Therefore, conclude that the solutions of the problem are as follws : 1. It is necessary to quickly make a long-range plan about the modernization of the agricultural marketing system. 2. It is good that the government adopts indirect support and policy rather than direct intervention during the modernization. 3. The modernization must be gradually promoted after fully examining the problems involved in it.
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강동묵,이철호,,신용철,김은아,우지훈,조병만,이수일 大韓産業醫學會 2005 대한직업환경의학회지 Vol.17 No.4
Objectives: As automobile part manufacturing is characterized by high speed and high repetition, observation methods which are usually utilized for static posture are inappropriate to evaluate musculoskeleatal risk factors. This study quantified the risk factors of musculoskeletal disorders on the forearm and suggested exposure limits by estimating the risk factors using surface electromyography (EMG) and electrogoniometer. Methods: Ten percent of the total workers at 3 automobile part manufacturing factories were randomly selected, and 99 male workers were recruited as study subjects. The study was conducted during May 2003 to September 2004. The workers were equipped with electrogoniometers on the wrist and the elbow, surface EMGs on the skin of the flexor digitorum superficialis (FDS) and extensor carpi radialis (ECR) muscles, and the heart beat recorder during work as indicators of joint movement, local muscle tension and physical work load, respectively. Results: After controlling for age, body mass index and job stress, wrist flexion maximum angle, FDS relative activity (RA) and ECR RA were significantly associated with forearm musculoskeletal symptoms. The odds ratios of the forearm were 5.0(95% CI: 1.1-22.7), 14.0(95% CI: 1.5-128.8) and 7.3(95% CI: 1.1-49.4) for wrist flexion maximum angle more than 76˚, FDS RA more than 2.8%, and ECR RA more than 3.5%, respectively. Conclusions: Joint angle and focal muscle activity were associated with forearm musculoskeletal symptoms. To reduce forearm musculoskeletal symptoms among automobile part manufacturers, the wrist flexion angle, and FDS and ECR activity need to be reduced below the guidelines recommended in this study.
강지연,전만중,유병철,이용환 고신대학교의과대학 2008 고신대학교 의과대학 학술지 Vol.23 No.4
Background : To access the influential factors of life satisfaction in low-income and living alone old people for solving the problem of the estranged elderly. Method : We conducted a questionnaire survey during the period from June 2007 till September 2007. Investigation subjects were 152 elderly people registered in two welfare centers in Busan. We measured life satisfaction of low-income and living alone old people and analyzed with descriptive analysis, t-test, one-way ANOVA and dummy variable regression analysis using SPSS Win(ver 12.0k) program. Result : The mean score of life satisfaction in low-income and living alone old people was 2.52 ± 0.56. Life satisfaction in low-income and living alone old people was relatively high in groups of 65-69 years old, elementary school graduates, subjectively healthy, exercise, hobby or leasure activity, regular repast, 3 times repast per day and income satisfaction. Life satisfaction in low-income and living alone old people was influenced by age, religion, satisfaction of income, subjective health conditions and regular repast. Conclusion : From the result, we can concluded that life satisfaction in low-income and living alone old people was low and influenced by various social and economic factors. Therefore, methods for improving life satisfaction level of low income and living alone old people are required for discerning our society's equality and healthiness.
姜志勇,高成寶 濟州大學校 亞熱帶農業硏究所 1998 亞熱帶農業硏究 Vol.15 No.-
ABSTRACT The purpose of this study is to investigate the effects on the citrus industry of orange import liberalization in Japan and to develop the strategies for orange market opening in a producing center and national level. In a producing center, in order to cope with orange market liberalization, countermeasures are as follows ; (1) making the structural adjustment and improving the infra- structure in Japanese citrus industry (2) producing high-quality products through the intensive management (3) producing low-cost products through the increase in yield per lOa. In a national level, in order to cope with orange market opening, policy programs are as follows; (1) estimating the optimal planted area of citrus which meets its nationwide demand through the production adjustment (2) improving the quality of citrus through variety replacement (3) stabilizing the price of citrus through juice processing.
강민구,배지훈,박경용,김갑일 명지대학교 산업기술연구소 2001 産業技術硏究所論文集 Vol.20 No.-
In this paper, a biped robot is designed and implemented, and walking tests are performed using a fast walking model. In order to embody the human joint structure, designed biped robot has each two degree of freedom attached to the pelvic, knee, and ankle . Using two motors for each knee makes it possible to have the same walking as human walking and fast walking. Also in joint controller, PID control algorithm may causes variation to the robot, which make the system unstable. Therefore, a PD controller is used to limit the vibrations as much as possible allowing steady state error to a certain extent.
강지용,김종선,윤남식,이희순,한성일 梨花女子大學校 韓國生活科學硏究院 1975 韓國生活科學硏究院 論叢 Vol.15 No.-
The following results were obtained from the survey of health status and the measurements of physical fitness of 914 students of Ewha Womans University by means of CMI, which were conducted from October 7 to October 27 for three weeks. The purpose of the research mainly consists in the improvement of university health adiministration and of physical education. A. Survey of Health Status 1. The average Number of Complaints are 26.8 for items A-L, 15.3 for items M-R, and 42.1 for items A-R. In terms of classes, the Numbers of Complaints are revealed on a decreasing scale as follows: sophomores, 44.0, the highest; seniors, 42.6; freshmen, 42.1; and juniors, 40.5. 2. Among all the items, the following figures of average Numbers of complaints per person are conspicuous: the seniors have shown 5.3 for item D, which is the highest; and the sophomores, 0,7, which is the lowest. Among the physiological item, D, which corresponds to the ailments of digestion system, shows the highest rate; and among the items for mental diseases, item M, which corresponds to nonadjustment, is 5.2, the highest. 3. The percentiles on the lower echelons of the Number of Complaints are the following: 26.1% for freshmen is the highest; 22.2% for sophomores, the lowest. The sophomores have shown 27.1%, the highest figure, of students who have Number of Complaints of four or above. 4. The percentile figures of 10 or above of Number of Complaints are displayed by seniors with 2.4% and by sophomores with 1.5%. On the other hand, the percentile figures of 80 or above are revealed by seniors with 5.4% and by sophomores with 5.3%. B. Physical Fitness Measurements The figures for the physical fitness measurements are found as given below: 1. Pullup Freshmen 18.4 seconds Juniors 9.3 seconds Sophomores 7.5 seconds Seniors 7.0 seconds 2. 100 Meters Dash An approximation of 19 seconds is recorded by freshmen, and the tendency is to be slower as the years go up. 3. Situps The freshmen recorded 13 situps, and the tendency is to be fewer as the years go up. 4. Throwing An approximation of 19 meters is marked by freshmen, and the tendency is to be shorter as the years go up. 5. Long Jump The freshmen marked 249.5 centimeters, and the tendency decreases as the years go up. 6. 800 Meters Run 4'1"8"'(4 minutes 1 seconds 8 points) is obtained for freshmen, and the tendency is to be slower as the years go up. 7. Shuttle Run 12.5 seconds is recorded for freshmen, and the tendency is to be slower as the years go up. 8. Trunk Flexion 18 centimeters is marked by freshmen, and the tendency is to be decreasing as the years go up.
姜志勇 濟州大學校 亞熱帶農業硏究所 1994 亞熱帶農業硏究 Vol.11 No.-
Facing an all-out opening of agricultural product markets, serious loss and stagnation in the farming of Cheju is expected. To overcome this situation, we must propel the strategy and policy for increasing competitive power based on our target of expanding export of agricultural products rather than the structural reform of agriculture and the financial support with special agricultural taxes. If we take the project of expanding export of agricultural products by increasing competitive power, domestic agricultural products can compete with imported agricultural products very effectively, and enlarging the foreign needs in return for the reducing domestic needs will be the best way. Japan is the best nation for increasing agricultural exports of Cheju. The reason is that Japan imports the largest amount of agricultural products from the world. Another reason is Japan's high exchange rate of yen and its being near Cheju. Especially, agricultural products are so different from industrial products in that they will go bad easily, which is a favorable condition for Cheju, which is nearest to Japan. The agricultural and stock-farming exports of Cheju to Japan have been trifling; the amount of export in 1993 was no more than $3,500,000. This study aims to present a plan for expanding export of agricultural, and stock-arming products to Japan, which is the largest agricultural market, and to activate the agriculture of Cheju which has been stagnated by opening markets. The following are the problems concerning export and a plan for expanding export. 1. The problems concerning agricultural exports (1) Lack of stable conditions for experts (2) Imperfection of export goods quality control & considerable expenses for transportation (3) Insufficient system for suporting export of agricultural-marine products & lack of foreign export basis (4) Shortage of foreign market information and public relations (5) Insufficient making use of given conditions 2. A plan for expanding export (1) Inspirations of strong will and cognition for opening up new markets (2) Adaptation to the new environment of free trade by preparing the basis for exporting agricultural products (3) Increasing competitive power through improving the quality of agricultural products (4) Intensive upbringing of strategic export goods (5) Selection and upbringing of expert export enterprises (6) Construction of synthetic intelligence ntework for Japanese markets (7) Positive application of Korean residents in Japan (8) Reinforcing the system for supporting agricultural exports (9) Opening up Japanese markets and reinforcing public relation