수산화마그네슘에 의한 배연탈황에 관한 연구

정홍기,장성호,임찬섭,김장호 동아대학교 환경문제연구소 1995 硏究報告 Vol.18 No.2

This study has been carried out to evaluate the effect on desulfurization of flue gas by Mg(OH)₂in steam-power cogeneration plant. We investigated the effects of desulfurizatin on the temperature of flue gas and pH of circulation water in aborber. The desulfurization installations of flue gas in cogeneration and thermoelectric power plant will be increased every year because of stricted environmental regulation in Korea. Some conclusions obtained are summerized as follows ; 1. With regard to running cost, Mg(OH)₂ absorbent for desulfurization of flue gas snowed more economic than Ca(OH)₂. 2. While bunker-C oil with 1.6% sulfur was used, desulfurization of flue gas by Mg(OH)₂ was performed and then SO₂ content in the exhausted gas was under 50 ppm. 3. In flue gas desulfurization, the optimum condition on the temperature and pH was 55-60℃ and 6 respectively, then efficiency was 96%.

농어촌 인구 정주에 관한 환경 계획적 연구

정성찬,이길영 大田大學校 環境問題硏究所 2002 환경문제연구소 논문집 Vol.6 No.-

The settlement of population in agricultural areas helps to prevent the influx of agricultural population to metropolitan areas and also contributes to improving residential environments of large cities. Constituting a major pillar to support balanced development of a nation, it can be said to be the key task in regional planning. Recently, Korean agricultural society has gone through a tremendous change. The economic policy of urbanization and industrialization enforced in the 1970's resulted in the concentration of industries and economies mostly in cities, which inevitably led to the phenomenon of so-called "leaving countries for cities." This indicates the outflow of agricultural population from countries into cities. As a result, the development of agricultural regions has slowed down, with the population decreasing and the community becoming empty, in contrast to urban areas. Consequently, agricultural areas are facing a crisis, and it is hard even to maintain them as residential areas. Furthermore, the wide regional gap between cities and agricultural areas derived from the process of urbanization and industrialization is recognized as a big barrier to the efficient use and balanced development of the land of the nation. Therefore, plans of rearrangements of residential environments in the agricultural areas are emergingas an urgenttask, both in revitalization of decreasing agricultural areas and in balanced developmentof the national territory. However, academic investment or developmental policies up to now have been mostly concentrated on cities. Matters of agricultural areas, thus, have been neglected as secondary problems to those of cities. It is essential to view the question of the settlement of agricultural population from various perspectives and to have academic involvement. Yet, the settlement of population, the result of movement, is a very complicated phenomenon originated in the relationships between residents, the subjects of settlement, and the surrounding regional circumstances. These phenomena vary according to the behaviors and attitudes of the residents. And the degrees of satisfaction of the residents differ depending on each individual's value system. Therefore, the attempt to establish the settlement of the agricultural population can be seen in this context. It is the biggest mission, then, to simultaneously examine both aspects, the aspect regarding regional environments and the aspect related to residents, the subjects of settlement. Finally, as mentioned before, it is necessary to note that the attributes and conditions are various both in a macroscopic level involving regions and in a microscopic level involving individuals as subjects of settlement. It is also necessary to investigate the perspectives from which the settlement in the agricultural regions is dealt with in the regional, environmental planning. Obviously, this issue needs be handled with external and internal analyses as it involves both the reality and the ideal of the residents' value system. Therefore, this study is not about simply restoring the past in regard to a series of problems with the settlement of agricultural population. This study aims to pursue the natural essence of agricultural areas in which new agricultural regions and cities can be integrated under the conditions of national territory, and at the same time, to deal with the agricultural areas as new space for settlement.

Expansin으로 형질전환 된 담배의 생장 특성

신하정, 성현정, 백승준, 김보미, 엄유리, 조은정, 정찬문, 이이 충북대학교 연초연구소 2008 煙草硏究 Vol.21 No.-

-본문참고-

스페로이드 조합자극치료 적용 후 만성요통의 통증 감소 효과

홍성찬,김영빈,박병근,김유성,이성진,정동혁 원광대학교 체력과학연구소 2008 體力科學硏究 Vol.30 No.1

The aim of the present study is to evaluate effects of Spheroid 9000NS applied to 10 elderly patients with Chronic Low Back Pain. The effects were measured and analyzed by means of MPQWL, VRS, VAS-I and VAS-U after 4, 8 and 12 weeks, respectively, during the 12-week application of the Spheroid 9000NS. From the findings of the measurement and analysis, following conclusion could be drawn: 1. Significant reductions in MPQWL were confirmed at each period of measurement since the use of Spheroid 9000NS(p<.001). 2. Significant reductions were also revealed in VRS at each period of the measurement(p<.001). 3. Significant reductions were also revealed in VAS-I at each period of the measurement(p<.001). 4. The same reductions were found as well in VAS-U 4, 8 and 12 weeks after the application of the Spheroid 9000NS(p<.001). In sum, it may be concluded from the outcomes that the use of Spheroid 9000NS may help reduce drastically Chronic Low Back Pain, mostly effective to remove them speedily and safely. Patients, rehabilitation therapists and health experts are, therefore, recommended to employ the products as safe and effective means to control pains. Continued researches and experiments should further be conducted to collect more data from the larger population of patients with particular diseases in clinical situation, though.

무산소성역치 트레이닝이 세포성 피부 면역력, 호흡순환반응 및 체구성에 미치는 영향

홍성찬,정동혁 圓光大學校 附設 體力科學硏究所 2002 體力科學硏究 Vol.25 No.2

This study aims to investigate the effects of long-term anaerobic threshold(AT) training on cell mediated immunity(CMI), cardiopulmonary function and body composition. For the survey of this study, 20 healthy males were selected at random among the college students who do not take exercise regularly. Selected students were again divided into a control group without exercise and experiment group with exercise. A twelve-week long training was conducted for the students of the experiment group whose AT strength was determined individually through GXT test prior to training. After the training, cell mediated immunity, was checked with CMI Skin Test. The results are as follows: 1. AT training group showed shorter response time in recognizing bacillus than the non-training group(AT training group: 24 hours; non-training group: 48 hours). 2. After the lapse of 24 hours, non-training group recognized 4 bacilli in average, while AT training group recognized 6 in average(p<.05), evidencing that the AT training helped produce memory T cells. 3. Regarding the average size of erythema, non-training group showed 3.79mm in average, while AT training group did 5.14mm. This bigger size indicates that the immunity cells of the students in the training group immediately attack and kill the penetrating bacilli while expanding blood vessels. 4. Compared to the non-training group, AT training group responded faster to trichophyton and candida. Such a result is associated with the fact that the increased blood circulation, a primary effect of AT training, prompted defense cells to memorize the contacts with bacilli at the peripheral areas of the body. 5. Compared to the non-training group, AT training group showed increase of □Emax by 3.25ℓ/min, □O2max by 4.27ml/kg/min(p<.01), HRmax by 3.57 beats/min(p<.01), AT-□E by 7.25ℓ/min(p<.01), AT-□O2 by 4.80ml/kg/min(p<.01), and AT-HR by 3.00 beats/min(p<.05) and decrease of % body fat by 2.13%. From these results, it became evident that AT training can contribute to improving cardiopulmonary function and to generating positive change in body composition. In summary, we may conclude that AT training can not only improve the cardiopulmonary functions but also contribute to strengthening cell mediated immunity and changing body composition positively. The AT training could, therefore, be recommended as suitable for enhancing physical health as well as for intensifying immunity. The training at the AT level may also be regarded as reasonable exercise prescription. Finally, it is thought to be desirable to make further studies to develop detailed training program and to increase training effects.

부산지역 산성강우의 장기적인 화학적 성상의 변화

황성욱,전보경,김찬훈,서정민,최금찬 동아대학교 환경문제연구소 2001 硏究報告 Vol.24 No.1

It is important to know the impacts of acid rain because of soil acidification, reduced biological productivity. Many researchers were interested in regional acid problems, and former research were focued in short-term trends of acid rain. It is not easy to evaluate acid rain problems because of many parameters relating to meteorological factors, which are wind, temperature, humidity and other factors. Rainfall sampling for this study was done from September 1933 to December 2000 in Dong-A University, Busan. All Samples were collected in separately to early fraction and succeeding fraction. Also, the samples were measured for pH, and EC, cations and anions were analysed by ion Chromatography.

운동기간에 따른 혈중지단백대사 및 비만호르몬의 변화

홍성찬,함용기,김영빈,박병근,정동혁,이정윤,권성택 圓光大學校 附設 體力科學硏究所 2003 體力科學硏究 Vol.26 No.2

The purpose of this study is to elucidate the effects of regular swimming exercise on blood lipoprotein metabolism and leptin. In this study, swimming(HRmax 50-75%, 60min/day, 5day/week) was performed and 18 were participated for study during 16 weeks. They were divided into two groups, one group as experimental group(n=9) and the other as control group(n=9). A measured factors were TC, TG, HDL-C, LDL-C and leptin.. All data were expressed as mean± standard deviation by using spss package program(win 9.0), one way anova and independent t-test was used to analyze the difference of exercise duration(0week, 8week, 12week, 16week) between groups. For all statistics performed statistical significance was set at p<.05. After exercise intervention, TC, TG, HDL-C, LDL-C and leptin were found to have more significant effects in the experimental group than control group. This results indicated regular swimming exercise training is beneficial to prevent and treat cardiovascular disease and obesity.

개에서 발생한 수컷 가성 반음양 1례

이기찬,손정민,윤기영,최호정,박성준,이영원,정성목,신상태,조종기 忠南大學校 獸醫科大學 附設 動物醫科學硏究所 2006 動物醫科學硏究誌 Vol.14 No.-

In this report, we present a case of the male pseudohermaphrodite in a beagle dog. The animal was subjected for examination due to enlargement of clitoris that was shown as reddish finger-like structure protruding from the vulva. Visual examination of the internal genitalia revealed that the animal possessed both testes and uterus. Based on the findings of physical examination and exploratory laparotomy, it was tentatively diagnosed as male pseudohermaphrodite. Internal genitalia and enlarged clitoris were removed for the prevention of pyometra and Sertoli cell tumor.

의료용 조합자극기(HAPPY DREAM HM-206DB) 적용이 동결견 환자의 통증과 관절가동범위에 미치는 영향

홍성찬,김영빈,박병근,김유성,이성진,정동혁 원광대학교 체력과학연구소 2008 體力科學硏究 Vol.30 No.1

The purpose of this study is to find out the effectiveness of the HAPPY DREAM HM-206DB applied to the patients with Frozen Shoulder by measuring, assessing and analyzing the changes in pain and range of motion(ROM). Surveyed from Mar. 2007 to Dec. 2007 were 10 patients suffering from Frozen Shoulder. After HAPPY DREAM HM-206DB, the pain were measured and analyzed by means of MPQWL, VAS-I and VAS-U, while ROM was measured and analyzed by using Goniometer. The major findings from this study are as follows; 1. There was significant decrease in the MPQWL after HAPPY DREAM HM-206DB applied(p<.001). 2. There was significant decrease in the VAS-I(intensity of pain) after HAPPY DREAM HM-206DB applied(p<.001). 3. There was significant decrease in the VAS-U(unpleasantness of pain) after HAPPY DREAM HM-206DB applied(p<.001). 4. There appeared, however, significant increase in ROM(abduction, external and internal rotation) after HAPPY DREAM HM-206DB applied(p<.001). From the above outcomes, it was revealed that HAPPY DREAM HM-206DB application has proven to reduce the pains, exercising huge influence to increase ROM. It is, therefore, suggested to continue and expand the study on the cure of Frozen Shoulder and to motivate patients, rehabilitation specialists, and health management specialists etc. to consider HAPPY DREAM HM-206DB application as safest and most efficient pain remedy.

P2P 파일 공유 에서 효율적인 네트워크 생성

안성수,이준,이정기,박찬모 東新大學校 2003 論文集 Vol.13 No.-

The leading applications in P2P(Peer-to-Peer) file sharing are Napster, Soribada, Gnutella and Kazaa. Napster and the early version of Soribada fall into the category of centralized P2P system in which a central server provides clients with the indices of shared files and clients share those files with the help of searching feature. Previous research on this resulted in Pastry, Freenet, Chord, and CAN. A node is not connected to an arbitrary node, but the structure of network is to be maintained by mapping the node and its target contents in a certain address space. Contents that are mapped in a certain address area calls for a routing only to that specific area which brings forth the advantage of increased search efficiency. Its weak point, though, is the overload in a certain area because the discriminator which is referred to by a content or a P2P client is mapped onto a physical network.