도시공원 조성에 따른 미기후환경의 변화 분석

김대욱(Kim, Dae-Wuk),김중권(Kim, Jung-Kwon),정응호(Jung, Eung-Ho) 한국도시설계학회 2010 도시설계 : 한국도시설계학회지 Vol.11 No.2

본 연구에서는 대구광역시 중구의 국채보상운동기념공원과 2.28기념중앙공원을 대상으로 도시공원의 조성 후 열섬 영향 정도와 미기후환경 변화를 정량적으로 분석하여 과거대비 미기후 측면의 효율성 검증과 도시내 공원의 중요성 및 필요성에 대해 살펴보고 이를 바탕으로 미기후개선을 위한 친환경적 도시공원 계획 및 도시계획 방안 제시를 목적으로 한다. 본 연구에서는 대구광역시 중구에 위치하는 2.28기념중앙공원과 국채보상운동기념공원을 대상으로 3차원 미기후분석프로그램인 ENVI-met을 이용하여 미기후환경(온도, 습도, 바람)의 변화를 분석ㆍ고찰하였다. 2.28공원 및 국채보상기념공원 조성으로 인한 미기후환경 변화를 요약하면, 지점별로 차이가 있지만 기존대비 각각 2.27%, 1.50%의 온도저감효과가 있는 것으로 나타났다. 습도는 기존대비 각각 5.52%, 2.83%의 상승효과가 나타났다. 본 연구는 과거의 미기후환경을 예측하여 공원 조성을 통한 미기후환경의 변화를 정량적으로 분석하였다는데 가장 큰 의의가 있다. 향후 도시계획 이전에 미기후의 변화를 모의하여 계획에 반영한다면 보다 쾌적한 도시조성에 효과를 줄 것이라 판단된다. This study examined the effect of Gukchae-bosang Memorial Park(GBM park) and 2.28 Jung-ang Memorial Park(JAM park) located at Jung-gu, Daegu on heat island phenomenon. The changes in micro-climate environment after the development of urban parks were analyzed quantitatively to evaluate the efficiency of the parks in terms of micro-climate control. The importance and necessity of urban parks are reviewed based on the analysis, and the guidelines for eco-friendly park and town planning are suggested. In this study, the microclimate environment factors of the urban parks, such as temperature, humidity, and wind, were analyzed and examined by ENVI-met -- a three dimensional micro-climate analysis program. The micro-climate environmental changes caused by the urban parks are as follows. The temperature decreasing effects by the parks were 2.27%(JAM park) and 1.50%(GBM park), and the humidity increasing effects were 5.52%(JAM park) and 2.83%(GBM park) respectively. The significance of this study is that the changes of micro-climate environment by urban parks were analyzed quantitatively on the assumption of the past micro-climate environment. It is expected that the simulation of micro-climate changes from the results of this study helps planners develop a better plan to create more pleasant urban environment.

Higenammine이 심근의 활동전압 및 수축에 미치는 영향

권평중,조성일,엄대용,이상돈 중앙대학교 의과대학 의과학연구소 1981 中央醫大誌 Vol.6 No.4

In order to investigate the action mechanism of higenamine on cardiac muscle cells, the isometric contraction and transmembrane action potential in rabbit papillary muscle preparations taken out from tight ventricles were observed. The isometric contraction and action potential were recorded in the control Tyrode solution and higenamine-Tyrode solution in which the preparations were kept beating (1 Hz.) for about 30 minutes to get stable data. The resting membrane potential, amplitude of action potential amplitude of overshoot potential, time of repolarization to 60%, 90% of the amplitude of action potential and the first derivatives of potential recorded transmembrane action potential in control Tyrode solution and higenamine (2.5×10^-7gm/ml) Tyrode solution in which showed about 130%-150% of positive inotropic effect compared with those controls. The following results were obtained. 1. Higenamine showed no effects on the time-to-peak tension. 2. Higenamine showed almost no effects on resting membrane potential, amplitude of action potential and overshoot potential. 3. Higenamine significantly shortened to repolarize 60% or 90% of the action potential from 218ms and 264ms in the controls to 200ms and 246ms respectively. (p<0.005) Therefore. the maximum values of the first derivatives of potential variations (- Vmax) in the plateau phase an d repolarization phase were also significantly increased from 16.3V/sec in the control groups to 17.3V/sec in the higenamine-treated groups. The above results which showed positive inotropic effect and simultaneously shortening of action potential duration by higenamine suggest possible involvement of the increase of slow inward current.

상악골과 비사골동에 이환된 백악질 골화성 섬유종(cemento-ssifying fibroma)의 치험례

권대현,김신유,남정순,구명숙,이봉서,권대근,김종배 大韓顎顔面成形再建外科學會 2001 Maxillofacial Plastic Reconstructive Surgery Vol.23 No.6

The cemento-ossifying fibroma is a benign fibro-osseous tumor that may behave in an aggressive pattern. Although found predominantly in the mandible, most of these unusual tumors may arise in the maxilla and paranasal sinuses. Especially these lesion in the maxilla and sinuses behave more aggressively and are more prone to recur compared to mandibular counterparts. Therefore, more radical approach may be recommended than expectant observation or curettage in the initial management of this neoplasm. This is a case report of cemento-ossifying fibroma extended to maxillary sinus and naso-ethmoidal area treated by wide surgical excision after repeated conservative treatments.

고효율 준호기성 매립구조에서 침출수처리를 중심으로 한 환경성 검토

권대원,서정인 嶺南大學校 工業技術硏究所 2002 工業技術硏究所論文集 Vol.30 No.2

Management of leachate generated from the semi-aerobic landfill system has become a serious problem in recent years. For the enhancement of the efficiency of semi-aerobic landfill system as well as the reduction of environmental impacts of leachate treatment, we examined three lysimeter systems including conventional system(A), leachate recirculation and surface capping liner system(B), and added air supply to system B(C). Exeriments were performed at room temperature with the municipal solid waste(MSW). Lysimeter B yielded higher reduction of organic compounds and nitrogen compared to lysimeter A due to the reasons that leachate recirculation maintained appropriate water content and nutrition balance in the MSW, and thereby the requirement energy for leachate to be treated was 120 times s much as leachate to be recirculated. Also, in the lysimeter B, the most of nutrification material, total nitrogen and total phosphate, were eliminated in the recirculation process. However, the reduction rate of organic compounds and nitrogen was seriously decreased in excess of 120 days, indicating that most of the soluble organic compounds and nitrogen in the MSW were released to the leachte phase in this period. During that time, the reduction rate of organic compounds and nitrogen was increased by the air supply. AS a result, lysimeter B is better than lysimeter A, in respect to energy consumption and eutrophication. It may be appeared that lysimeter C has disadvantage in energy consumption, but it has advantage in respect to reuse of landfill come earlier true.

매립된 쓰레기에 있어서 종이류와 주방쓰레기의 조성비에 따른 가스발생포텐셜의 변화

권대원,서정인 嶺南大學校 環境問題硏究所 1996 環境硏究 Vol.16 No.1

요약문매립되는 생활쓰레기는 그 대부분이 비닐봉지에 충진된 상태로 매립되는 것이 일반 적이며 매립지내 생활쓰레기의 분해 상황에 대한 조사는 봉지내부의 쓰레기를 파악하는 것 이 효과적이다. 따라서 본 연구에서는 매립경과 1년후의 봉지형쓰레기중 종이류와 주방쓰레 기의 조성비 변화에 따른 가스발생포텐셜을 평가하기 위하여 매립쓰레기의 성상과 그 물리 ·화학적인 특성과 혐기성 반응기에서 배양실험을 하여 분해상황을 평가하였다. 그 결과, 매 립경과 1년 후의 쓰레기중 생 물이 분해성쓰레기의 조성은 습윤중량을 기준으로 종이, 주방 쓰레기, 나무류의 순으로 각각 26%, 7%, 2%로 나타났다. 종이류와 주방쓰레기의 조성비별 가스발생포텐셜은 종이의 함유비 100%, 80%, 60%, 40%, 0%에서 각각 0.432, 0.074, 0.070, 0.176, 0.134로 나타났으며 종이의 함유비 100%가 종이의 함유비 60%에 비해 약 6배이상의 가스발생량을 보였으며, 종이함유비가 100% < 40% < 0% > 80% < 60%의 순으로 가스발 생을 보였다. CH,의 발생은 종이의 함유비 0%, 40%, 60%의 경우 검출되지 않았으며, 종이 의 함유비 100%의 경우 0.189, 종이의 함유비가 80%의 경우 0.005로 나타났으며, 종이의 함 유비 40%, 60%의 반응기는 높은 수소분압으로 CH洲 발생하지 않은 것으로 생각된다.AbstractTo evaluate gas production potential on the composition ratio of garbage and paper in landfill samples, physico-chemical characteristics of landfill refuse, gas production volume and composition in anaerobic incubation of landfill sample after 1 year in landfill were investigated. On the wet weight base, the composition of biodegradable refuse such as paper, garbage (including vegetables), and wood after 1 year in landfill was presented 26 %, 7 % and 2 %, respectively. Gas production potential on composition ratio of garbage and paper in landfill samples at incubation time 60 days, when paper content ratio is 100 %, was presented the highest value as 0.432 among five experimetal series. The methane was detected in the reactor of paper content ratio over 80 %.

실무개발자를 위한 BSD 소켓프로그래밍에 관한 연구

최대석,권중장,최재원 경성대학교 공학기술연구소 2002 공학기술연구지 Vol.9 No.-

네트워크 응용 프로그램을 개발하기 위해서는 Socket API를 많이 이용한다. Socket API를 이용해 정상적인 동작을 하는 것은 아주 쉽다. 그러나 실제 개발 과정에서 정상적인 상황이 아닌 여러 가지 비정상적인 오류에 처하게 됨에 따라 속수무책일 때가 많다. 따라서 본 논문에서 각 플랫폼별로 비정상적인 오류들의 사례 연구를 통하여 효율적인 응용시스템 개발에 도움을 주고자 한다.

老人療養施設 入住 意思가 있는 韓國 中年層의 老後 展望 및 老人療養施設에 대한 認識과 選好

김대년,권오정 대한건축학회 2005 대한건축학회논문집 Vol.21 No.1

Korea has a rapidly aging population as more and more people are living to an older age Although managing to live In their own homes(aging-in-place) in the most desirable arrangement, there is a need for long-term care facilities to enable elderly people to get social and medical care services Such facilities avoid the high costs of long-term hospitalization for the elderly and provide social services to those without family members to take care of them This study was conducted to clarify the perceptions and preferences of middle-aged Koreans about their outlook on aging and long-term care facilities for the elderly A Survey questionnaire by 1100 adults In their 50s living In different big cities in Korea was used to collect the data The data of 623 of those surveyed who expressed willingness to reside at such facilities If they were very frail was analyzed using SPSS window program The results are as follows, a majority of respondents 1) perceived that the responsibility was theirs for making arrangements for their future care and housing, but thought that the government should make greater efforts to Improve the facilities for the elderly, 2) didn't have negative stereotypes of those facilities, 3) perceived the facilities would provide a systematic care service and should include user-paid medical facilities and that It should be available for middle and high-class elderly, 4) perceived that various kind of facilities should be developed according to the degree or type of disability, length of residence, and the level of service, 5) preferred the facilities to be located in City suburbs first, in cities second, and in the country last, 6) preferred to have personal spaces of 11-20 pyung and to have public spaces primarily for sports and other recreational activities The education level of respondents or their spouses, average monthly Income and property Status were major variable's which showed significant differences in the perceptions and preferences of middle-aged Koreans willing to reside at long-term care facilities The results of this study provides reliable information for the development of long-term care facilities In the near future

장기투석을 받은 만성 신부전 환자에서 발생한 종양에 관한 고찰

황정화,이혜경,홍현숙,박재성,김대호,권귀향,최득린,황승덕,이희발 순천향의학연구소 1996 Journal of Soonchunhyang Medical Science Vol.2 No.2

The authors tried to evaluate tumor occurrence in long-term dialysis patients with chronic renal failure. Among 359 patients, 20 patients (about 5.6%) were diagnosed with malignancy during long-term dialysis from the period of 1983 to 1995 at our nephrology department. The ultrasonographic and computed tomographic findings including the clinical features of 20 patients that were retrospectively reviewed. The mean age of the patients was 53 (37-75)years old and the ratio of male to female was 9:1. Among the 20 cases, 7 cases of hepatoma (35%) were developed. Among them, urinary tract tumors such as renal and bladder cancer were developed in 4 (20%) and 2 (10%) of the cases. Other malignant tumors were lymphoma, stomach cancer, uterine cervical cancer, cholangiocarcinoma, lung cancer, meningioma, and acoustic neuroma one case of each (each of 5.3%). The most common tumor in patients with chronic renal failure, who were receiving long-term dialysis, was hepatoma and the second most common tumor was cancer of the urinary tract such as kidney and bladder.

만선신부전 환자에서 관상동맥조영술 소견에 관한 연구

한대희,김성구,박상호,김성한,조원영,방덕원,조윤행,정의룡,은영근,권영구 순천향의학연구소 2003 Journal of Soonchunhyang Medical Science Vol.9 No.1

Background : Patients with chronic renal fialure have a substantially elevated risk of death from cardiovascular diseases than do the general population. the patients with chronic renal failure are at significantly increased freqeuncy of hypertension, hyperlipidemia, and diabetes mellitus which are known to the risk factors of the coronary artery diseases, and the prevalence of the coronary artery diseases in chronic renal failure patients is highly associated with the hemodynamic disorder and metabolic abnormalities. therefore we expected that the coronary angiographic findings in patients with chronic renal failure should be different from the general population (control groups) and investigated the risk factors contributing to coronary artery diseases. Method : we have retrospectively compared the coronary angiographic findings of 44 patients with chronic renal failure on hemodialysis with that of 88 patients in the general population and investigated the factors contributing to the development and acceleration of coronary artery diseases in patients with chronic renal failure Result : Hypertension and diabetes mellitus which is risk factors for coronary artery disease is significantly increased in patients with chronic renal failure, in coronary angiographic finding the severity of the lesion is worse. the incidence of PCI or CABG of patients with chronic renal failure is more than that of control group but statistically no difference between patients with chronic renal failure and control group. the sex, the duration of disease, the duration of dialysis, serum creatinine in patients with chronic renal failure have no correlation to the prevalence of coronary artery disease and severity of lesion. hyperglycemic patients with chronic renal failure have high incidence of coronary artery disease and are worse in the severity of lesion Conclusions : There is significantly increased the pevalence and severity of involving multiple coronary artery diseses in hyperglycemic patients with CRF.

고감도 다공질 실리콘 수광 다이오드의 제조 및 특성

설정훈,이정희,이종현,권대혁,신장규 경북대학교 센서기술연구소 1995 센서技術學術大會論文集 Vol.6 No.1

A porous silicon-based photodiode has been fabricated by selective anodization of Si wafer and deposition of ITO(Indium Tin Oxide) as a transparent electrode. PECVD silicon nitride was deposited for the passivation of the device. The fabricated photodiode shows a very high photo-responsivity of 0.73A/W at 800nm wave length and a rise time of about 8ns at 100Ω load resistance. In order to find out the electrical conduction mechanism in the photodiode, metal/porous silicon Schottky diodes have also been fabricated. Their I-V characteristics are similar to those of p-i-n diodes and amorphous silicon diodes, unlike those of conventional Schottky diodes.