인조 합성 테니스 바닥재의 지면 반력 분석

조승제,정미라,서국웅,박승범,윤양진,이훈식,강영택 釜山大學校 附設 體育科學硏究所 1998 體育科學硏究所 論文集 Vol.14 No.-

Some authors suggest that certain types of surfaces are the origin of such injuries. A few years after the first medical concerns about surfaces were voiced, publications of biomechanical measurements apperared, describing accleration, force, and impact measurement on different types of surfaces. In many sport activities, surfaces can be under very high dynamic load. This was the reason for the development of various methods for impact simulation, like the development of various methods for impact simulation, like the artificial athlete. Furthermore, it is important to collect information about the hardness of new and already existing surfaces in sport arenas. The idea on which this measuring system is based Is as follows: The stiffness of the material can be computed from the kinematics measurd at touch down of a rigid body onto a material sample. The results show the following The result for the artifical surfaces(Synpave ace) is surprising. It is known that these surfaces are much harder than synpave rebound classic, synpave spring. This finding suggests that it may be possible that the subjective impression is used as one criterion in the selection of landing(or style) strategies. The number of subjects in this experiment is too small to make statistically significant conclusions. It is shown analytically that when an object a deformable surface, the acceleration it experiences is inversely propotional to its mass. In future, it need to stress that the interaction between shoe and surface is important, and this aspect has now become well accepted. Considering biomechanical aspect in player's injury, it request Korean Standards for synthetic playing surfaces in sport like ASTM(America Society for Testing & Materials) standards of America, DIN 18035 standards of Germany, BSI standards of U.K.

폴리에스테르 섬유 감량시스템용 프로세서 타이트레이터 개발

조진호,이흥락,이종현,김명남,구성모,김무영,진경찬,유병희,강민수,김국진 경북대학교 센서기술연구소 1993 연차보고서 Vol.1993 No.-

폴리에스테르 섬유 감량시스템의 제어를 위해서는 처리조 내에서 감량되는 섬유가 목표 감량치에 도달했는지를 판단해 주는 장치가 필요하다. 본 연구에서는 가성소다용액의 초농도 및 섬유 감량 정도의 정확한 측정과 감량 종료시간의 산출 및 이에 따른 종료신호를 발생할 수 있는 폴리에스테르 섬유 감량기 전용의 자동적정장치를 개발하였다. To control caustic soda treatment system for the polyester fabric reduction, we need the device to determine that the fabric has been arrived target reduction value. In this study, we develope an automatic process titrator for the caustic soda treatment system. Major functions of the target titrating system are accurate measurements of the caustic soda concentration and then producing the end point signal for caustic soda treatment system.

유사체액에서의 전기화학적 처리가 티타늄 표면의 인산갈슘 흡착에 미치는 영향

조국현,김문영,송광엽,배태성,이민호 大韓齒科器材學會 2002 대한치과재료학회지 Vol.29 No.3

This study was performed to examine the effect of electrochemical treatment on the precipitation of apatite-like calcium phosphate in a simulated body fluid. Titanium plates of 20×20×1 ㎣ in dimensions were polished sequentially from #600 to #2,000 emery paper and one surface of each specimen was received an additional polishing sequence through 0.1㎛ alumina paste. To improve the bioactivity of titanium plates, they were electrochemically treated at 100 mA for 20 min in an electrolyte containing the calcium and phosphate ions, and the Hanks' solution with pH 7.4 at 36.5℃ for 30 days, and the surfaces were examined with X-ray diffractometer(XRD), scanning electron microscope(SEM) and X-ray photoemission spectroscopy(XPS). Precipitation of calcium phosphate and CaO were observed on the electrochemically treated titanium surface in a simulated body fluid after treatment at 600℃. Precipitation of calcium phosphate was densified and coarsened with increasing the temperature of the electrolyte solution in the range of 20-80℃. The calcium phosphate contained phosphate in the form of Po₄^3-, HPO₄^2-, and H₂PO₄^-.

One Arm Curl 동작의 Simulation

조동욱,서국웅,윤양진,김정태,조승제 釜山大學校 附設 體育科學硏究所 1997 體育科學硏究所 論文集 Vol.13 No.-

In recent years, numerical simulation of human body motion has received an increasingly wider range of application. Computer simulations have greatly contributed to the understanding of kinematics and dynamics of human motion. Such simulations are being used in ergonomics to better understand and thus improve the interaction of persons with machines and with workplace configurations. In sports, the simulations are being used to optimize performance, to develop equipment for injury prevention, and to speed and enhance recovery from injury. Then in this study simulated one arm curl motion for understanding force and moment in arm's each joint, and this segment modeling was used 2-dimension, 3-link system. From simulation of mathematica 3.0 we found kinematic and kinetic factors with imaginatively lift of dumbbell and simulated random value of the last curl angle, weight of dumbbell, cycle of motion and so on. The conclusions of this study is as follows ; 1. As this study link system, weight of dumbbell influence not a stance and motion but magnitude of force and moment. 2. The force showed even as smooth curve in all cycle. Moment showed biggist between 0.5sec and 1.5sec. The magnitude order is shoulder, elbow and wrist joint. 3. Motion of system in this study is very similar human arm's motion considering that law of inertia and helped effectively delegation of force. 4. Mathematica is useful language as simulation program. Forward it needs study about modeling and simulation on muscle factors, also human body simulation.

인체 혈장에서 염산시프로플록사신(시프로플록사신으로서 250㎎) 정량을 위한 HPLC 분석법의 유효성검토

하용화,조성희,천성국,서성훈,류재환,최영욱,이경태 한국약제학회 2004 Journal of Pharmaceutical Investigation Vol.34 No.4

A simple HPLC method with ultraviolet detection of ciprofloxacin in human plasma was developed and validated. After protein precipitation with trichloroacetic acid, chromatographic separation of ciprofloxacin in plasma was achieved at 50℃ with a C_18 column and methanol-phosphate mixture (pH 2.5), as mobile phase. Quantitative determination was performed by ultraviolet detection at 278 nm. The method was specific and validated with a limit of quantification of 100 ng/ml. The infra- and inter-day coefficients of variation were between 1.67% and 10.55% and accuracy between 92.01% and 106.09%. The method has been successfully applied in a bioavailability study of 250 ㎎ ciprofloxacin hydrochloride tablet.

비만 치료 및 예방에 대한 한약의 효능 연구 (4)

金連燮,卞晟僖,金相贊,國萬,趙應行 대한본초학회 2000 大韓本草學會誌 Vol.15 No.2

We had experiment with five herb in order to find cure and prevention effects on the obesity. We fed control group rats high fat diet(Harlan, USA) and administered normal saline during 8 weeks, and experimental group rats high fat diet(Harlan, USA) and administered five herbal extract during 8 weeks. The results were as follows; 1. The body weight of all experimental group decreased than control group. 2. The average size of the epididymal fat cells in all experimental group decreased than control group but only Zeae Stigma and Crataegi Fructus group showed statistically significant difference with control group. 3. The fat drops area of hepatic lobule in all experimental group decreased than control group but Plantaginis Semen, Zeae Stigma and Crataegi Fructus group showed statistically significant difference with control group. 4. The area % of the insulin granules in Langerhans islet of all experimental group showed no difference with control group.

비만 치료 및 예방에 대한 한약의 효능 연구(Ⅱ) : 4종 처방이 비만 흰쥐의 면역조직화학적 변화에 미치는 영향

金蓮燮,卞晟僖,徐富一,金相贊,國萬,趙應行 대한본초학회 2000 大韓本草學會誌 Vol.15 No.1

We had experiment with several prescriptions in order to find cure and prevention effects for an obesity. We fed control gmup rats high fat diet and administered normal saline for Bweeb. And we fed experimental gmup ram high fat diet and administered exmct of four prescriptions for Bweek. The result were as follows: 1. The size of the epididymal fat cell of rats in Bikam-whan, Chekamhanghyuluiyiin-rang and Chekambohyulansin-tang groups showed a significant decrease in comparison with control group. 2. The fat drops area in hepatic lobule of rats in Bikam-whan, Cheknmhanghyuluiyiin-rang, Chekambohyulonrin-tang, and Chekambangpungrongseong-san groups showed a significant decrease in comparison with control group. 3. The area of the insulin granuls in islet of rats in Bikam-who4 Chekamhnnghyuluiyiin-tang and Chekambohyulonrin-tong group showed a significant decrease in comparison with control group. According to above these results, Bikam-whan. Cheknmhonghyuluiviin-tnng and Chekambohyulonrin-tang have shown to be capable of cure and prevent for an obesty.

비만 치료 및 예방에 대한 한약의 효능 연구 ( Ⅷ )

金蓮燮,卞晟僖,金相贊,國萬,趙鷹行 대한본초학회 2001 大韓本草學會誌 Vol.16 No.2

Objects : We had experiment with Chekamhanghyuluiiin plus Zeae Stigma in order to find effects on cure and prevention of the obesity. Methods : We fed control group rats high fat diet(Harlan, U.S.A.) and administered normal saline during 8 weeks, and experimental group rats high fat diet(Harlan, USA) and administered Chekamhanghyuluiiin plus Zeae Stigma extract during 8 weeks. Results : 1. The body weight of all experimental group decreased than control group. 2. The average size of the epididymal fat cells in all experimental group decreased than control group but only 7CH5 group showed statistically significant difference with control group. 3. The fat drops area of hepatic lobule in all experimental group decreased than control group but 4CH10, 7CH5 and 7CH10 group showed statistically significant difference with control group. 4. The area % of the insulin granules in Langerhans islet of 7CH5 and 7CH10 group showed difference with control group. Conclusion : Chekamhanghyuluiiin plus Zeae Stigma could be effective for the obesity.

내분비 기능이 없는 췌장 도세포 종양-1예 보고

정재걸,박건춘,윤상기,한덕종,조영국 울산대학교 의과대학 1993 울산의대학술지 Vol.2 No.1

Nonfunctioning pancreatic endocrine tumor is a rare disease without showing any specific clinical manifestations. Indolent growth of this tumor has a prognosis in between functioning endosrine tumor of pancreas and exocrine adenocarcinoma. We experienced a nonfunctioning pancreatic islet tumor in 59 year old male patient. The tumor in the body of pancreas was clinically silent and had no hormonal activity in immunohistochemical staining

Diatomaceous earth를 이용한 경제적이고 효율높은 homemade PCR purification column의 제조 및 평가

이동호,이승관,이창규,조경진,최명재,이국성 高麗大學校 倂設 保健大學 保健科學硏究所 2002 保健科學論集 Vol.28 No.2

In recent years the amount of sequencing has increased tremendously, especially due to the introduction of automated DNA sequencing. PCR is principal method for the synthesis of templates for DNA sequencing. Consequently, the need for PCR cleanup for template preparation has increased. Already, many PCR purification kits are marketed. This DNA purification kits uses most glass membrane or silica gel, So, can do rapidly efficient purification by simple miniprep. But, efficiency of purification kits is different according to manufacturer and is very expensive. Therefore, we compare the homemade Diatomaceous earth column with major manufacturer's spin column methods for DNA purification. As a result, we found that the homemade Diatomaceous earth column method resulted in equal or better yields relative to the commercial purification kits.