식물플라크톤의 세포외배출유기물을 고려한 소양호의 1차생산과 유기물 부하

남궁현,김범철,황길순,최광순,김철구 江原大學校 附設 環境硏究所 2001 環境硏究 Vol.18 No.-

The autochthonous and allochthonous organic carbon loading were measured in Lake Soyang, to estimate the amount of carbon loading into the lake and the contribution of their sources to the lake's carbon loading. Autochthonous carbon loading was estimated from phytoplankton primary production with the extracellular organic carbon(EOC). Allochthonous loding was determined by measuring dissolved organic carbon(DOC) and particulate organic carbon(POC) concentration in the main inflowing Soyang River. Both autochthonous and allochthonous organic carbon loading were high during the summer, from July to September, and accounted for 43.2% and 71.7% of the annual loading, respectively. Primary productivity was elevated up to 1,000 mgCm^(-2)d^(-1)during summer and lowest in winter. EOC production from phytoplankton was also large in summer, resulting in a high DOC concentration in the lake water. Primary production of phytoplankton and allochthonous organic matter loading from the watershed contributed to 53.6% and 46.4% of total loading, respectively. The EOC production accounted for 4.4~21.2% of POC primary production, implying that EOC production of phytolankton must be considered in estimation of primary production.

청각, Codium fragile (Suringar) Hariot의 胞囊의 形態 및 成熟時期에 關하여

金南吉,元容仁,孫徹鉉 國立統營水産專門大學 附設 水産科學硏究所 1990 수산과학연구소보고 Vol.2 No.-

본 연구는 1984년 4월부터 1985년 3얼까지 채집된 충무 연안산 청각을 대상으로 포낭의 형태 및 성숙 시기를 구명하기 위하여 수행되었다. 조사지역의 수온은 7.5~25.4℃였으며, 염분은 32.9~34.5‰로 나타났다. 배우자낭은 조사한 조체들은 모두 성숙 또는 미성숙한 배우자낭을 가지는 신장된 형태의 포안이 많았다. 대부분의 조체가 자웅이체 이었으며, 일부가 자웅동체로 암배우체 보다는 숫배우체의 출현율이 높았다, 동계에 채집된 조체들 중 일부는 절두형 또는 신장된 형태의 포낭을 가진 것이 많았으며, 하난의 포낭에 암, 수의 배우자낭을 함께 가진 조체가 출현하였고 하나의 포낭에서 파생된 또 다른 포낭을 볼 수 있었다. The present work was carried out to investigate the maturing period and the morphology of utricle Codium fragile collected from April 1984 to March 1985 in the coast of Chumgmu southern of Korea. Ranges of water temperature and salinity during the survey period were 7.5∼27.0℃ and 32.9∼34.5%, respectively. The gametangia were produced throughout the year. Mature gametangia were present on plants collected from June to November, whereas most of plants collected from January to May occured as the elongated utricles with both mature and immature gametangia. As for the sexuality, most of plants were dioecious and some monoecious, and there were more male gametophytes rather than female gametophytes. Some plants collected during winter months of December to February were observed as thalli with both brunted and elongated utricles, and male and female gametangia occured together on a single utricle.

PBD가 설치된 연약지반의 원심모형실험에 관한 연구

정길수,박병수,전상현,유남재 강원대학교 산업기술연구소 2006 産業技術硏究 Vol.26 No.B

This study is the result of experimental and numerical study on the consolidational behavior of multi-layered soft soil ground installed with plastic board drains (PBD). Centrifuge model tests with a marine clay sampled from field were performed to investigate the consolidational behavior of multi layered ground where a dredged soil was placed on the soft clay ground and PBDs were installed. Test results were compared with those of numerical analyses, using the 2-D equivalent model previously proposed. From test resuts, it was found that the amount of consolidation settlement occurred in the original ground due to embankment surcharge loads was in the range of 38% of total settlement in the whole ground. From the results of cone penetration tests executed after finishing the centrifuge model tests, the cone resistance was found to increase with depth. The measured water contents inbetween PBDs were in the ranges of 38~50% and their values tended to increase with increasing the distance between PBDs.

대전시 가로수 식재지 토양의 화학적 특성에 관한 연구

고소현,박관수,강길남,방병욱,김동일 충남대학교 농업과학연구소 2005 농업과학연구 Vol.32 No.1

This study was carried out to examine the effect of heavy traffic on chemical properties of soil in roadside trees of Daejeon city. Soil samples at 0~10cm and 10~30cm depths were collected from soil of the roadside trees, Platanus occidentalis. and Ginko biloba. Soil pH in heavy traffic regions were around 7.0 at 0~10 cm and 10~30cm soil depths because of spraying of calcium chloride for snow moving. The concentrations of Fe, Cd, Cu, Zn, and Pb in soil were higher in heavy traffic regions(Daejeon Station and Daehwa Industrial Complex) than in light traffic region(Chungnam National University). The result could be from rubbing and wear of car tire and metals when they travel.

PBD가 설치된 연약지반의 원심모형실험에 관한 연구

정길수,박병수,전상현,유남재 강원대학교 산업기술연구소 2006 産業技術硏究 Vol.26 No.A

This study is the results of experimental and numerical study on the consolidational behavior of multi-layered soft soil ground installed with plastic board drains (PBD). Centrifuge model tests with a marine clay sampled from field were performed to investigate the consolidational behavior of multi-layered ground where a dredged soil was placed on the soft clay ground and PBDs were installed. Test results were compared with those of numerical analyses, using the 2-D equivalent model previously proposed. From test resuts, it was found that the amount of consolidation settlement occurred in the original ground due to embankment surcharge loads was in the range of 38% of total settlement in the whole ground. From the results of cone penetration tests executed after finishing the centrifuge model tests, the cone resistance was found to increase with depth. The measured water contents inbetween PBDs were in the ranges of 38~50% and their values tended to increase with increasing the distance between PBDs.

성인 물질남용 환자의 치료결과와 관련된 요인

김길숙,박용천,남정현,안동현,오동열 大韓神經精神醫學會 1998 신경정신의학 Vol.37 No.5

목 적 : 본 연구는 성인 물질남용 환자의 치료프로그램 탈락율, 치료결과 및 예후에 영향을 미치는 요인을 알아보기 위해 시행되었다. 방 법 : 1992년 9월 1일부터 1997년 4월 15일까지 국립서울정신병원 물질남용 입원치료프로그램에서 치료를 받고 퇴원한 환자 97명을 대상으로 병록지 검토를 통해 인구학적 특징, 물질남용상의 특징, 입원전 위험 행동력, 치료기간중의 특징이 치료완료여부와 관련이 있는지 분석해 보았고, 이중 전화추적조사가 가능했던 53명을 대상으로 물질남용 중단여부를 조사하고, 이와 관련된 요인을 알아보았다. 결 과 : 1) 퇴원형태에 따라 59명의 탈락군(60.8%)과 38명의 완료군(39.2%)으로 나누어 비교한 결과 탈락군은 입원기간이 짧고, 자의 입원율이 낮으며, 난폭행동의 과거력이 많고, 규칙위반의 횟수가 많은 것으로 나타났다(p〈.05), 프로그램에서 탈락한 주 이유는 병동내 규칙위반(45.3%), 산책중 도망(23.7%), 외출, 외박중 미귀원(15.2%)의 순이었다. 2) 전화로 추적조사가 가능했던 53명중 32명이 물질남용을 중단했고(60.4%). 21명이 아직 남용중인 것으로(39.6%) 나타났다. 남용군은 공존정신질환의 빈도가 높고, 과거 정신과적 입원 횟수가 많으며, 자살기도력의 빈도가 높은 것으로 나타났다(p〈.05). 3) 물질남용을 중단하게 된 계기는 국립서울정신병원의 치료프로그램에 참여하고 난 후가 45.3%로 가장 많았고, 치료를 완료한 환자일수록 퇴원후 치료결과가 좋은 것으로 나타났다. 그리고 물질남용을 중단한 환자일수록 직업을 가지고 있는 경우가 더 많았다(p〈.05). 결 론 : 물질남용 여부는 공존정신질환, 과거정신과적 입원횟수, 자살기도력등 동반된 정신과적 문제와 관련이 많은 것으로 나타나 이런 요인들에 대한 철저한 평가 및 치료가 필요할 것으로 추측되고, 환자의 동기는 치료를 완료하는 중요한 요인으로 나타나 입원 과정에서 치료에 대한 동기를 강화시킬 수 있는 정신과적 면담이나 전략이 필요할 것으로 생각된다. Objectives : We investigated the factors related to the treatment outcome for substance abuse inpatients. Methods : We reviewed the medical records of 97 patients who were discharged from the substance abuse treatment unit in Seoul National Mental Hospital. We then had follow-up telephone interview with 53 family members and / or patents of 97 patients. Results : 1) Among 97 discharged patients, 59 patients were dropped out, 38 patients graduated successfully from the treatment program. The dropout group had shorter treatment period, were more often admitted involuntarily, had greater incidence of violence history and violated ward rules more often(P<0.5). The main reasons for dropout were violation of rules(45.3%), escape during outdoor activities(3.7%), and refusal of return to the hospital(15.2%). 2) At the follow-up interview, 32 patients were abstaining from substances whereas 21 patients resumed use. The abuser group had more previous psychiatric admissions, more comorbid psychiatric disorders, and higher percentage of history of suicide attempts than the abstaining group(P<0.5). 3) After the discharge from the hospital, 45% of patients showed to discontinue substance. Treatment graduates were more in recovery from substance abuse. The abstaining group had a higher percentage of employment than the abuser group(P<0.5). Conclusion : The treatment outcome was more likely to be related with co-existing psychiatric problems such as previous psychiatric admission, comorbid psychiatric disorders, and history of suicide attempts. Therefore it is suggested that careful evaluation and appropriate treatment for such factors are needed for better treatment outcome. And psychiatric interview to enhance the motivation of patients is needed for completion of treatment.

곡관 덕트내 난류 비정상유동의 압력분포

박길문,이행남,백대우,손현철 朝鮮大學校 機械技術硏究所 2000 機械技術硏究 Vol.3 No.1

In this study, Flow characteristics of turbulent unsteady flows in a square-sectional 180°curved duct were experimentally investigated. Experimental studies for air flow were conducted to measure pressure distributions in the square-sectional 180°curved duct by using a magnehelic differential pressure gage. The experiment were conducted in nineteen sections from the inlet (ø=0°) to the outlet(ø=180°) of the duct at 10°intervals. The results obtained from the experimentation are summarized as follows. (1) In the turbulent oscillatory flow, the pressure distribution was the largest in the accelerating and decelerating region of the bend angle of 90°and the pressure difference of the inner and outer walls was the largest before and after the bend angle of 90°. (2) In the turbulent pulsating flow, the pressure difference was the largest near the region of bend angle of 90°in the case of the middle region, and since then the pressure difference of the inner and outer walls became smaller.

출생후 흰쥐 구치의 발육에 따른 치수의 신경지배 발달에 관한 면역조직화학적 연구

김영진,남순현,배용철,김동길,김현정 大韓小兒齒科學會 1996 大韓小兒齒科學會誌 Vol.23 No.4

The purpose of this study was to investigate the postnatal development of pulpal innervation with the tooth development and eruption process in developing rat mandibular molars (postnatal 1, 5, 10, 15, 20, 25, 35day-old and adult rats). Immunohistochemical method was carried out for the detection of nerve fibers, using the antibody against calcitonin gene-related peptide(CGRP). The results were as follows: The feature of CGRP-IR nerve fibers were shown in a bead-like appearance. The time of nerve entering into the dental papilla of tooth follicle began at the occured advanced dentinogenesis. The development of Raschkow plexus began at the formative stage of the roots and was accelerated at the stage of the crown emerged into the oral cavity. The number of nerve fibers entering the odontoblastic layer increased with the tooth eruption and mastication. The development of innervation was shown to be related with the stage of the development of individual teeth rather than the chronological age of the rat.

풍화암에 근입된 그라운드 앵커의 인발거동 연구

박병수,정길수,전상현,유남재 강원대학교 산업기술연구소 2006 産業技術硏究 Vol.26 No.A

This study is an numerical study of predicting the behavior of anchor embedded in weathered rocks, subjected to uplift loads, about ultimate pullout capacity and the failure mechanism. Factors influencing the behavior of anchors were investigated by reviewing the data about in-situ anchor tests performing numerical modelling with changing the bondage length of anchor, diameter of anchor body and diameter of tenden, and by Correlations between those factors were evaluated to apply them to predict the behavior of anchors. As results of numerical analysis, a linear relationship between bondage length, diameter of anchor body and diameter of tenden with ultimate pullout capacity was obtained on the one hand, from the result of numerical analysis changing the Young's modulus of weathered rock, this parameter was found to inflence to load-displacement and ultimate pullout capacity within the range of 10%, which was mot so significant to affect.

풍화암에 근입된 그라운드 앵커의 인발거동 연구

박병수,정길수,전상현,유남재 강원대학교 산업기술연구소 2006 産業技術硏究 Vol.26 No.B

This study is an numerical study of predicting the behavior of anchor embedded in weathered rocks, subjected to uplift loads, about ultimate pullout capacity and the failure mechanism. Factors influencing the behavior of anchors were investigated by reviewing the data about in0situ anchor tests performing numerical modelling with changing the bondage length of anchor, diameter of anchor body and diameter of tenden, and by Correlations between those factors were evaluated to apply them to predict the behavior of anchors. As results of numerical analysis, a linear relationship between bondage length, diameter of anchor body and diameter of tenden with ultimate pullout capacity was obtained on the one hand, from the result of numerical analysis changing the Young's modulus of weathered rock, this parameter was found to inflence to load-displacement and ultimate pullout capacity within the range of 10%, which was mot so significant to affect.