제29회 베이징 올림픽 탁구남자개인단식 금메달리스트의 대상별 탁구경기전술분석

이동헌(Lee Dong-Heun),정구인(Jung Koo-In),송창훈(Song Chang-Hoon) 한국체육과학회 2010 한국체육과학회지 Vol.19 No.3

This is an analysis of Lee Dong-heun's table tennis tactics(2010) in the 29th Bejing Olympics focusing primarily on Marin's performance in the finals. I searched for Vod materials on the OK ping-pong website, and TV broadcasting materials to obtain the analysis. After analyzing the 3 games of Marin point by point, I came to the following conclusion. First of all, Marin could win the games with his own tactical patterns. On the other hand, Wang Hao and Wang Richin of China also won the games with their own tactical patterns, but they lost the games without their own tactical patterns. Second, Wang Hao(China), Wang Richin(China) and Oh Sang Eun(South Korea) should have increased the frequency of their main scoring tactics and raised their scoring success rate. In other words, Marin(China) had a higher scoring success rate than the others. However, it is natural that Marin(China)'s table tennis tactics were able to block Wang Hao, Wang Richin and Oh Sang Eun's.

각종치과용 Composite resins의 특성에 관한 비교연구

이종흔,최선진,정동균,김철위 대한치과기재학회 1984 대한치과재료학회지 Vol.11 No.1

The purpose of this study was to investigate the physical and mechanical properties of six commercially available two-paste composite resin systems used in Korea. The following properties were studied; inorganic filler content, setting time, diametral tensile strength, water sorption and indentation resistance. These tests were performed according to the modified methods of A.D.A.Spe. No. 27 and I.S.O. 4049. The results were as follows; 1. Compared with the conventional composite, the microfilled composites had lower values of inorganic filler content. 2. The microfilled composite resins had longer setting times than the conventional composites. 3. Microfilled resins tended to be somewhat weaker than conventional composite resins, with respect to diametral tensile strength, they were in the same general range. 4. The microfilled resins sorbed significantly more water than did the conventional composite resins. 5. The conventional composites had values of depth of indentation considerably less than the microfilled composite resins.

Capsaicin과 Paradol이 구강내 유해자극에 의한 개구반사와 신경흥분 전달에 미치는 영향

최동주,신일영,김중수,이종흔 대한구강생물학회 1988 International Journal of Oral Biology Vol.12 No.2

This study was performed to elucidate the analgesic mechanism of paradol and to compare effects of paradol with those of dihidrocapscaicin(DHC). Rabbits(2-2.5kg both sexes) were anesthetized with pentobarbital sodium(30mg/kg I.V.), and cannulated in trachea and external jugular vein. To observe effects on jaw opening reflex, inferior alveolar nerve(IAN) of both sides were exposed for drug application, and wire electrodes were inserted in anterior belly of digastric muscle for recording of EMGs of anterior belly of digastric muscle(dEMG) and in oral mucosa covering mental foramen for applying noxious stimulation. dEMGs evoked by noxious stimulation with double intensity of threshold for digastric EMG were recorded in magnetic tape recorder. To observe effects on action potential, saphenous nerve were exposed, and three tissue pools were made from surrounding tissue. The most distal pool was used for applying stimulation, the most proximal one for recording of action potentials, and the other on for drug application. Action potentials evoked by 200 folds intensity of threshold for most sensitive fiber were recorded in magnetic tape recorder. One side of IAN and saphenous nerves were used for DHC or paradol applications, the other side of nerves for control experiments(only vehicle application). Vehicle consisted of 10% Tween 80, 10% ethanol and 80% physiological saline(v/v), and drugs were solubilized in vehicle for 1.5% concentration(w/v). dEMGs and action potentials were recorded before drug application, immediate after 30 minutes drug application, at 30 and 60 minutes after drug had been washed out. DHC application on IAN could not influence on dEMG, but paradol application decreased the amplitude of dEMG. In action potential experiments, DHC decreased amplitude and conduction velocity of only C fiber, while paradol did those of C-fiber and Aδ-fiber.

한국인의 치아우식 조절에 관한 연구 : Ⅳ. 金堤郡 치문국교 학동의 尿中弗素濃度, 班狀齒指數 및 學童居住地域의 飮料水弗素濃度에 關한 硏究 Ⅳ. STUDY ON THE RELATION BETWEEN THE URINARY FLUORIDE CONCENTRATION, THE FLUOROSIS INDEX AND THE FLUORIDE CONCENTRATION OF DRINKING WATER IN BAIKKU-MYUN, KIMJAE-KUN

丁東均,李種昕,李孝宰,金各均,吳貴玉,鄭泰英 대한구강생물학회 1979 International Journal of Oral Biology Vol.3 No.1

The urinary fluoride concentration and the degree of dental fluorosis of all the schoolboys attending Chimoon primary school in Baikku-myun, Kimjae-kun and the fluoride concentration of drinking water of those areas were investigated in an effort to elucidate the relation between them. The urinary fluoride concentration and the fluoride concentration of driking water were measured by fluoride ion electrode, and dental fluorosis was surveyed and analysed by Dean and McKay's and Horowitz's method. 1) The mean urinary fluoride concentration and the mean fluorosis index of all the schoolboys were 1.89ppm (0.12-12.2ppm) and 0.79 (0-1.99). The mean fluoride concentration of drinking water of those areas was 0.61ppm (0.027-2.66ppm). 2) The mean urinary fluoride concentration and the mean fluorosis index of the schoolboys residing in Yookang-ri 5-ku, Baikku-myun (Dongja-po) were the highest (3.23ppm, 1.99) among the statistics for the schoolboys residing in different areas. Incidentally the fluoride concentration of drinking water for that area was also the highest (1.99ppm). 3) The urinary fluoride concentration was two to ten times as high as the fluoride concentration of drinking water regardless of the resident area of schoolboys. 4) There was no significant seasonal change in fluoride concentration of drinking water collected from the well in the resident area of schoolboys. 5) There showed a relatively parallel relationship between the urinary fluoride concentration and the fluorosis index of schoolboys. 6) The urinary fluoride concentration and the fluorosis index of schoolboys tend to increase with age increasing.

한국인의 치아우식 조절에 관한 연구 : Ⅲ. 白鼠우치痍患率에 미치는 數種 稀 有元素, 쌀 및 各種 양념의 影響 Ⅲ.EFFECTS OF SEVERAL TRACE ELEMENTS, RICE AND SPICES ON THE CARIES RATE IN RATS

鄭東均,鄭素英,李孝宰,金各均,吳貴玉,李種昕 대한구강생물학회 1979 International Journal of Oral Biology Vol.3 No.1

Two-part experiment was conducted to elucidate the effects of several trace elements, rice and spices on caries rate in Korean albino rats. Rats were selected into two large groups according to their weight ; one group (for part I experiment) consists of rats weighing 140-200gm and the other group (for part II experiment) consists of rats weighing 76-109gm, and the same experiment was conducted independently for both groups. Rats were fed standard cariogenic diet supplemented with rice (21, 53%), capsicum (1, 10%), garlic (0.5, 5 or 10%), phosphorus (2%), sodium chloride (3%, reagent grade), or table salt. Drinking water was tap water containing cold water extract of capsicum (0.1%) alcoholic extract of capsicum (0.1%), water extract of ginseng (2%), fluoride (10, 50 or 100ppm) or 50ppm of Mg, Zn, Mo, Sr, Mn of Fe. The results were as follows. 1. 24.9%, 51.0% and 54.3% decrease in caries score were recorded for rats which drank water containing 10, 50 and 100ppm of fluoride in part I experiment. In part II experiment caries score decreases 51.8% and 56.9% for 10ppm and 50ppm fluoride content. 2. Capsicum-fed rats showed 51.7% (capsicum 1%) and 58.1% (capsicum 10%) decrease in caries score in part I experiment. 21.5% and 33.6% decrcase were recorded for part II experiment. 3. Garlic-fed rats showed 44.5% (garlic 0.5%), 23.0% (garlic 5%) and 53.7% (garlic 10%) decrease in caries score. 4. Sodium chloride-fed rats showed 122.6% (NaCl 3%) increase in caries score. 5. Rats which were fed diet containing 2% Na_2HPO_4 showed 26.7% decrease in caries score and further 41.6% decrease when 10ppm fluoride was given simultaneously. 6. 28.4% and 31.5% decrease in caries score were recorded for rats which drank water containing 50ppm of Mg and Zn.

한국인의 치아우식 조절에 관한 연구 : Ⅰ. 만경·동진강유역 음료수내의 수종 무기질 함량 Ⅰ. THE CONTENTS OF SEVERAL ELEMENTS IN DRINKING WATER AROUND THE REGIONS OF THE MANKYUNG AND DONGJIN RIVERS

이종흔,정동균,김중수,이효재,김각균,오귀옥,정태영 대한구강생물학회 1979 International Journal of Oral Biology Vol.3 No.1

Mineral analyses of water samples from several areas of the Mankyung River and the Dongjin River regions in Chonrabukdo where dental fluorosis was observed, which had been conducted between June in 1978 and January in 1979, have shown the following results. In general, the mean calcium concentrations were high in the areas where the mean concentrations of phosphorus and fluoride were low. And in the same area where dental fluorosis was particularly observed, seasonally a few minerals were variable─namely, calcium, phosphorus, and fluoride. Those samples of high fluoride concentration have higher phosphorus concentration, but calcium concentrations were the opposite phenomenon. Particularly, fluoride concentrations were remarkably greater during the cold season(January) than during the rainy season(July).

Periaquenductal gray 와 nucleus raphe magnus 자극이 medullary dorsal horn의 세포 활성도와 serotonin 및 enkephalin 농도에 미치는 영향

정동균,이종흔,김중수 대한구강생물학회 1987 International Journal of Oral Biology Vol.11 No.2

This experiment was carried out to clarify the role of periaqueductal gray (PAG) on the neural activity in medullary dorsal horn (MDH) and influences of PAG or nucleus raphe magnus (NRM) on methionine-enkephalin (MENK) and serotonin which were related to modulation of pain. Rabbits were operated under general anesthesia, and fixed to stereotaxic apparatus. Caudal brainstem and rostral spinal cord were exposed and activity of neurons in MDH were recorded with glass-coated tungsten microelectrode. The cells which were responded to noxious or non-noxious stimuli were classified as low threshold (LT), wide dynamic range (WDR) and nociceptive specific (NS) neuron, and modulatory effects of PAG on these neurons were evaluated. In some animals, brainstem including MDH was removed after PAG or NRM stimulation for quantifying the content of serotonin and MENK by HPLC and RIA, respectively. PAG stimulation modulated activities of LT, WDR and NS neurons in MDH, and mainly produced inhibitory effect. The inhibitory effects of PAG stimulation were significantly greater in NS neurons than in LTneurons (χ^2=3.98, P<0.05). Content of serotonin in MDH was decreased by PAG or NRM stimulation, this effect was greater in NRM stimulation than in PAG stimulation. In MENK content, PAG or NARM stimulation induced only slight decrease. In summary, PAG influenced afferent pathway for central transmission of mechanical stimuli in oro-facial region, and serotonin and MENK were related to descending inhibitory mechanism of PAG and NRM.

가토에서 일측 요관 부분 및 완전폐색시 신장과 요관의 조직학적 변화

김상현,김용웅,육승모,한동석,노안식,임재성,김홍식,나용길,설종구 충남대학교 의학연구소 2003 충남의대잡지 Vol.30 No.2

This study was designed to clarify histologic changes in the experimental rabbit kidney and ureter after unilateral partial or complete ureteral obstruction. A total of 20 adult white rabbits were divided into 4 subgroups in the partial obstruction followed by 2 weeks, the partial obstruction followed by 4 weeks, the complete obstruction followed by 2 weeks, and the complete obstruction followed by 4 weeks. The normal control group was consisted of 5 adult white rabbits. The kidneys and ureters for light microscopy were fixed in 10% neutral formalin, embedded in paraffin and stained with hematoxylin and eosin. Abnormal histologic fingings showed in ipsilateral kidney and ureter of all subgroups(such as dilatation of uriniferous tubule, focal necrosis and desquamation of epithelium, interstitial fibrosis, glomerular congestion, widening of Bowman's space, dilatation of ureter, epithelial cell atrophy or loss, interstitial fibrosis and interstitial inflammation). These findings were most severe in the group of the complete-obstructed ureter for 4 weeks. No significant changes showed in contralateral ureter of all subgroups. The degree of obstruction was severe and period of obstruction was long, the histological changes in ipsilateral side were severe. Despite of changes in ipsilateral side no abnormal findings showed in contralateral side. We suggest that long term experimental investigation of histologic changes in ipsilateral side and compensatory changes in contralateral side have to be studied.

초등학교 체육전담교사제와 학급담임제에 따른 학생체력 비교

이정흔,김동준,안정훈 忠南大學校體育科學硏究所 1998 體育科學硏究誌 Vol.16 No.1

This research has been done to compare how much difference there is between their physical strength, after a physical educator has instructed 100 students (50 boys and 50 girls) ans a homeroom teacher has instructed another 100 students (50 boys and 50girls) for 9 months, who are the fifth grade students of an elementary school located in the city of Yong in The research result is as follows: 1) In case of the 100m race, the boy students instrected by a physical educator were superior to the students instructed by a gomeroom teacher by 1,44 seconds, and the girl students. by 1.81 seconds. 2) In case of the standing-long-jump, the boy students instructed by a physical educator were superior to the students in instructed by a homeroom teacher by 19.1 centimeters. and the girl students, by 11.8 centimeters 3) In case of the 600m race, the boy students instructed by a physical educator were superior to the students instructed by a homeroom teacher by 0.68 second. and the girl students, by 0.73 second. 4) In case of the ball throwing, the boy students instructed by a physical educator were superior to the students instructed by a homeroom teacher by 2.2 meters, and the girl students. by 4.1 meters. 5) In case of the boys pull up, the boy students instructed by a physical educator were superior to the students instructed by a homeroom teacher by 2.1 times, and in case of the girls' flexed arm hang, by 5.4seconds. 6) In case of the sit ups, the boy students instructed by a physical educator were superior to the students instructed by a homeroom teacher by 5.1 times, and the girl students. by 13.8 times. According to the above result, the students instructed by a physical educator were superior to the students by a homeroom teacher in all kinds of examination of physical strength. These superior records are because a physical edycator has instructed the students in the systematic and national based on a technical knowledge and given them a proper motivation. On the other hand the students by a homeroom teaher have neglected athletic classes because of main subjects and he has not given them a proper motivation because he doesn' t have enough technical knowledge. The physical educator system has not been activated because of the problems such as the unpreparedness of a physical educator training system. the ignorance of the persons concerned. the persistence of the homeroom teacher system. and the lack of an administrative support/but the elementary school physical educator system has to spread throughout the country and we have to help children improve their physical strength and achieve their balanced bodily structure by this system.

아동의 스포츠 활동 참가자 EQ와 스트레스에 미치는 영향

조동진,박도헌 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.14 No.4

This study aims at providing the basic materials for developing the sport program for the emotional maturity of children by analyzing the effects of sport activity on the formation of child's EQ and Stress. It makes 250 boys attending Y, K and S elementary schools and participating in the program of sports for all by S Sports Center and K Sports Center the objects of this research and divides them into participation and non-participation groups in sport activities and then divides both groups into participation groups over 2 years and under 2 years. For the analysis of data collected, T-test is conducted by using the statistical program, SPSS for Win 11.0 and the following conclusions as the result of executing the significant difference test in 5% level are obtained. First, it is found that there is a difference in EQ and Stress between participants and non-participants in sport activities. Second, it is known that the degree of influence of the period of participation in sport activities on the development of child's EQ and Stress is different and the longer the period of participation in sport is, the higher the development of EQ is. Third, it is shown that the items of sports are Taekwondo, others, swimming, football and baseball, which affect the EQ and Stress development in order.