조절 방출법의 기술 , 이론 및 응용

고영찬,문상흡 ( Young Chan Ko,Sang Heup Moon ) 한국화학공학회 1975 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.13 No.4

The primary intention of this paper is to present a broad introduction of controlled-release technology. Discussions are centered on techniques of formulation and release mechanisms of active ingredients. Aspects of practical application of this technology, together with some actual examples, are also provided.

4차 산업혁명 시대의 펄프·제지 산업의 창의적 성장 전략

고영찬(Young Chan Ko) 한국펄프·종이공학회 2017 한국펄프·종이공학회 학술발표논문집 Vol.2017 No.10

펄프 · 제지 산업의 발전을 위한 창조적 성장의 필요성

고영찬(Youngchan Ko) 한국펄프·종이공학회 2014 한국펄프·종이공학회 학술발표논문집 Vol.2014 No.4

위생용지 부드러움의 객관적 평가 방법 개발 및 표준화

고영찬(Young Chan Ko),박종문(Jong-Moon Park),문병근(Byoung-Geun Moon) 한국펄프·종이공학회 2015 펄프.종이기술 Vol.47 No.5

Softness is considered one of the most important attributes of hygiene paper such as tissue and towel. Being subjective in nature, however, softness attribute has been generally believed to be impossible to evaluate using objective methods. Hallmark in his pioneering work proposed that tissue subjective softness should be mainly consisted of the bulk softness component and surface softness component. The bulk softness component can be determined by tensile stiffness; the surface softness component by surface tester. The surface friction turns out far more important than the surface roughness in determining the surface softness component. It cannot be too much emphasized that both results of the tensile stiffness and the surface friction should depend on measuring conditions such as an instrument used, sample sizes (e.g., basis weight, length, and width) and operating conditions of the instrument (e.g., gauge length, cross-head speed, size of stylus, and its scanning speed). This indicates that a direct comparison of the test results would be impossible or misleading unless they have been tested under the identical conditions. This may explain why the standard objective test method for tissue softness has not been available at present.

저항운동과 유산소성 운동 순서에 따른 복합운동이 건강관련체력, 에너지기질에 미치는 영향

고영찬(Yeong Chan Ko),김영표(Young Pyo Kim) 한국사회체육학회 2012 한국사회체육학회지 Vol.0 No.48

The purpose of this study was attempted to to identify the effects of combined resistance exercise and aerobic exercise course on health-related, and energy substrates. This study divided 24 healthy college students into the group of aerobic exercise after resistance exercise(n=8), the group of resistance exercise after aerobic exercise(n=8), and the control group(n=8) and thereby conducted a combined exercise program of different order for 12 weeks. Resistance exercise was conducted 4 times a week with the intensity of 60~70% of 1RM during the 1st through 8th week and the intensity of 70~80% of 1RM during the 9th through 12th week. Aerobic exercise was conducted 4 times a week with the intensity of 60~70% of maximum heart rate during the 1st through 8th week and the intensity of 70~80% of maximum heart rate during the 9th through 12th week. The results are as follows. 1. Changes of the health-related physical fitness In the changes of body composition through which we can know the degree of obesity. Body fat significantly decreased in both groups after 8 weeks and the decreased values were similar in each other group. However, the group of aerobic exercise after resistance exercise showed a significant increase of LBM after 8 weeks. We think that the method of aerobic exercise after resistance exercise was more effective than the other type of program. In the changes of physical fitness, flexibility, muscular endurance, muscular strength, and cardiovascular endurance of both exercised groups significantly increased compared to a control group. However, the increased values in both exercised groups showed similar results. 2. The changes of energy substrates There were no significant differences in glucose and free fatty acid being used by elements of energy substrates between the group of aerobic exercise after resistance exercise and the group of resistance exercise after aerobic exercise. Lactic acid, however, significantly decreased in the group of aerobic exercise after resistance exercise(0>12 weeks) and in the group of resistance exercise after aerobic exercise (0> 8, 12 weeks) compared to control group, respectively. Ultimately, this study provides evidence that the program which conducted aerobic exercise after resistance exercise is more effective than the program which conducted resistance exercise after aerobic exercise in the aspect of improving body composition. However, the both exercised groups showed a similar effect regardless of the order of execution of exercise in the elements of physical fitness and energy metabolism.

운동처방 유형이 비만 중년여성의 건강관련체력 및 혈중지질에 미치는 영향

고영찬(Yeong Chan Ko),이창준(Chang Joon Lee),김영표(Young Pyo Kim) 한국발육발달학회 2005 한국발육발달학회지 Vol.13 No.4

The purpose of this study was to investigate the effect of combined aerobic and resistance exercise on health-related fitness and blood lipids The subjects for this study were composed of twenty-one obese middle-aged women. The subjects were randomly assigned to three group a control group (CG, n=7), an aerobic exercise group (AEG, n=7), a cross-exercise group that combined both aerobic and resistance exercise group (XEC, n-7). The AEC and XEG exercised for 12 weeks and were monitored for changes in health-related fitness and blood lipid profiles. The results of this study are as follow; 1. Back strength, trunk flexion were significantly increased and 1,600m run was significantly decreased in AEG, XEG after 12 weeks of exercise. And back strength showed significant increase In XEG, and trunk flexion showed significant increase In AEG, XEG compared to CG after exercise. 2. Body weight, percentage of body fat(% fat), waist-hip ratio(WHR) were significantly decreased in AEG, XEG, and lean body mass(LBM) was significantly increased in XEG, whereas was significantly decreased in AEG after 12 weeks of exercise. % fat showed significant decrease In XEG compared to CG after exercise. 3. TC, TG, LDL-C were significantly reduced and HDL-C was significantly increased in AEG, XEG after 12 weeks of exercise. And TG showed significant decrease in XEG compared to CG after exercise. In conclusion, our results observed that combined exercise and aerobic exercise improved health-related fitness and blood lipids in obese middle-aged women. And the results of this study suggest that combined exercise can contribute to the better benefit in health-related fitness and blood lipids than aerobic exercise for obese treatment.

펄프ㆍ제지 산업에서의 프랙탈 기하 원리 및 그 응용

고영찬(Young Chan Ko),박종문(Jong-Moon Park),신수정(Soo-Jung Shin) 한국펄프·종이공학회 2015 펄프.종이기술 Vol.47 No.4

Until Mandelbrot introduced the concept of fractal geometry and fractal dimension in early 1970s, it has been generally considered that the geometry of nature should be too complex and irregular to describe analytically or mathematically. Here fractal dimension indicates a non-integer number such as 0.5, 1.5, or 2.5 instead of only integers used in the traditional Euclidean geometry, i.e., 0 for point, 1 for line, 2 for area, and 3 for volume. Since his pioneering work on fractal geometry, the geometry of nature has been found fractal. Mandelbrot introduced the concept of fractal geometry. For example, fractal geometry has been found in mountains, coastlines, clouds, lightning, earthquakes, turbulence, trees and plants. Even human organs are found to be fractal. This suggests that the fractal geometry should be the law for Nature rather than the exception. Fractal geometry has a hierarchical structure consisting of the elements having the same shape, but the different sizes from the largest to the smallest. Thus, fractal geometry can be characterized by the similarity and hierarchical structure. A process requires driving energy to proceed. Otherwise, the process would stop. A hierarchical structure is considered ideal to generate such driving force. This explains why natural process or phenomena such as lightning, thunderstorm, earth quakes, and turbulence has fractal geometry. It would not be surprising to find that even the human organs such as the brain, the lung, and the circulatory system have fractal geometry. Until now, a normal frequency distribution (or Gaussian frequency distribution) has been commonly used to describe frequencies of an object. However, a log-normal frequency distribution has been most frequently found in natural phenomena and chemical processes such as corrosion and coagulation. It can be mathematically shown that if an object has a log-normal frequency distribution, it has fractal geometry. In other words, these two go hand in hand. Lastly, applying fractal principles is discussed, focusing on pulp and paper industry. The principles should be applicable to characterizing surface roughness, particle size distributions, and formation. They should be also applicable to wet-end chemistry for ideal mixing, felt and fabric design for papermaking process, dewatering, drying, creping, and post-converting such as laminating, embossing, and printing.

유 · 무산소성 복합운동 순서가 혈중지질 및 호르몬에 미치는 영향

고영찬(Ko, Yeong-Chan),김영표(Kim, Young -Pyo) 한국체육과학회 2014 한국체육과학회지 Vol.23 No.6

The purpose of this study was attempted to identify the effects of combined aerobic exercise and anaerobic exercise course on blood lipid and hormone. This study divided 24 healthy college students into the group of aerobic exercise after resistance exercise(n=8), the group of resistance exercise after aerobic exercise(n=8), and the control group(n=8) and thereby conducted a combined exercise program of different order for 12 weeks. Resistance exercise was conducted 4 times a week with the intensity of 60~70% of 1RM during the 1st through 8th week and the intensity of 70~80% of 1RM during the 9th through 12th week. Aerobic exercise was conducted 4 times a week with the intensity of 60~70% of maximum heart rate during the 1st through 8th week and the intensity of 70~80% of maximum heart rate during the 9th through 12th week. The results are as follows. TC, TG and DHL-C were significantly decreased in both groups after exercise and the decreased values were similar in each other group. However, HDL-C were significantly increased in the group of aerobic exercise after resistance exercise. And HDL-C were significantly higher in the both exercise groups than the control group after the 8, 12 weeks of exercise. Growth hormone were significantly increased in the group of resistance exercise after aerobic exercise. Testosterone were significantly increased in the both exercise groups after exercise. And Testosterone were significantly higher in the both exercise groups than the control group after the 8, 12 weeks of exercise. In conclusion, The both exercised groups showed a similar effect regardless of the order of execution of exercise in the elements of blood lipid and hormone. Therefore, it is wished that further studies be carried out on the effect and development of combined exercise program.

부산항의 개발단계별 수질환경변동특성에 관한 연구

고영찬(YEONG-CHAN KO),김종인(JONG-IN KIM),류청로(CHEONG-RO RYU) 한국해양공학회 2000 韓國海洋工學會誌 Vol.14 No.3

This study aims to examine the characteristics of the water quality variation in relation to the change of water exchange rate with respect to the development phases of the Pusan port. To clarify the characteristics, water exchange caused by the variations of coastline shape and water surface area was examined by the numerical experiments using the Lagrangian particle tracking model based on 2-D shallow water equation. As the results of numerical experiments, it was proved that the water exchange in the Pusan port was decreased mainly due to the port development and the breakwaters construction. During the port development phases from 1875 to 1998, 35 % of the sea-space in the port had decreased to make hinterland spaces. This resulted in the loss of wet-land and coastline change as well as decrease of the water exchange rate at the sea side. The city population in that period had rapidly increased from several thousands to 4 millions, resulting in the large discharge of sewages into the port area Under the these environmental conditions, it can be clearly said that the water quality in the Pusan port is sensitively affected by the discharge of urban sewages decrease of the water exchange rate in relation to port and urban developments. In the study, the temporal changes of water quality were discussed with respect to the port development phases. It was clear that the water quality was controlled by the exchange rate change under the port development as well as the input impact into the port from the urbanized city area. To make clean sea of the Pusan port, it is suggested that the sewage control, the water exchange and coastline control should be systematically checked under the concept of eco-friendly development and environmental management.

걷기와 달리기 속도에 따른 에너지소비 및 에너지 기질 분석

고영찬(Yeong Chan Ko),김영표(Young Pyo Kim) 한국사회체육학회 2008 한국사회체육학회지 Vol.0 No.33