제주도 지하수 질산염 농도의 시·공간적 변화 특성: 장기(1993-2015) 모니터링 자료의 평가

김호림(Ho-Rim Kim),오준섭(Junseop Oh),도현권(Hyun-Kwon Do),이경진(Kyung-Jin Lee),현익현(Ik-Hyun Hyun),오상실(Sang-Sil Oh),감상규(Sang-Kyu Kam),윤성택(Seong-Taek Yun) 대한자원환경지질학회 2018 자원환경지질 Vol.51 No.1

1993년부터 2015년까지 관측된 제주도 지하수 장기모니터링 관측정(N = 4,835)에서 수집된 지하수 수질자료(N = 21,568)를 기반으로 질산성질소의 시공간적 변동 특성을 평가하였다. 제주도 지하수의 질산성질소 농도의 중앙값은 2.5 mg/L로서 다른 국가나 대륙의 조사 결과에 비해 다소 높거나 유사한 것으로 나타났다. 또한 지하수 용도, 행정구역 및 고도 별로 유의한 차이를 보였다. 특히, 산간 지역에 비해 저지대 해안가에 위치한 농업 및 주거지역에서 농도가 높음을 확인하였다. Mann-Kendall 및 Sen’s slope 분석을 활용한 질산성질소 농도의 추세 분석 결과, 하류 저지 대에 비해 중산간지역에서의 질산성질소 농도 증가 경향이 뚜렷하였다. 제주도 내 토지 피복의 시계열 변화 특성과 결부 지어 보면, 중산간지역의 오염 증가 추세는 농업지역의 확장 등 인위적 활동 증가에 기인한 결과로 판단된다. 반면,기지정된 지하수자원특별관리구역에서는 전반적으로 질산성질소 농도의 감소 경향이 나타났는데, 이는 지하수 관리 측면에서 수질관리를 위한 적극적인 정책이 유효함을 시사한다. 본 연구에서는 제주도 지하수의 질산성질소 오염관리를 위한 적정 방안을 제안한다. The spatio-temporal variations of nitrate concentrations in groundwater of Jeju Island were evaluated by an analysis of time series groundwater quality data (N = 21,568) that were collected from regional groundwater monitoring (number of wells = 4,835) for up to 20 years between 1993 and 2015. The median concentration of NO 3 -N is 2.5 mg/L, which is slightly higher than those reported from regional surveys in other countries. Nitrate concentrations of groundwater in wells tend to significantly vary according to different water usage (of the well), administrative districts, and topographic elevations: nitrate level is higher in low-lying agricultural and residential areas than those in high mountainous areas. The Mann-Kendall trend test and Sen’s slope analysis show that nitrate concentration in mid-mountainous areas tends to increase, possibly due to the expansion of agricultural areas toward highland. On the other hand, nitrate concentrations in the Specially Designated Groundwater Quality Protection Zones show the temporally decreasing trend, which implies the efficiency of groundwater management actions in Jeju. Proper measures for sustainable groundwater quality management are suggested in this study.

관광 여행 가이드 매칭앱 설계

김도윤,박형민,오상태,이성욱 韓國交通大學校 2022 한국교통대학교 논문집 Vol.57 No.-

After a period of tourism stagnation due to the corona virus epidemic, Korea is preparing to lift self-isolation and PCR results. Accordingly, we designed a platform application that can connect consumers and suppliers of travel guides that can respond to the influx of domestic and foreign tourists. DB design and client design were made using NoSQL-based Firebase server, Android Studio, and Java language. The suggestion app provides location-based tourist recommendation and tourist information output using GPS, and tour guide matching service using user information.

소장 질환이 의심되는 환자에서 캡슐내시경과 CT 소견의 비교

이성수,홍성숙,김정훈,김연수,김진오,권석범,박성태,장윤우,최득린,권귀향 순천향의학연구소 2007 Journal of Soonchunhyang Medical Science Vol.13 No.1

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마우스 폐선종을 이용한 항발암 실험법

윤택구,김성호,오영란 대한암학회 1987 Cancer Research and Treatment Vol.19 No.1

이족로봇의 경사면 균형 유지와 보행에 관한 연구

오성남,윤동우,손영익,김갑일,임승철,강환일 명지대학교 산업기술연구소 2007 産業技術硏究所論文集 Vol.26 No.-

This paper aims to provide a way to improve dynamic stability of biped robots against undesirable disturbances and in a slope. By using an angular velocity sensor and an acceleration sensor on its waist, we can make a medium-sized biped robot walk stably in a slope against impulsive disturbances. In addition, it is possible for the robot to walk stably in an unknown slope. The measured signals from the sensor are used for compensating the reference angles of ankle, knee, and pelvis joints. Some experiments show that the stability of the robot is much enhanced by using cheap sensors and a simple algorithm. This work helps biped robots walk more stably in real environments.

科學的 態度 및 興味를 爲한 學習方法 및 學習資料 開發에 關한 硏究

吳允謙,金英昊,左升元 濟州敎育大學 科學敎育硏究所 1977 科學敎育硏究誌 Vol.2 No.-

The purpose of this study is to lead learners to observe the natural objects and phenomena correctly, and set up practical examples of effective methods for the study of elementary science by the learners participating at positive activities in the study with absorbing interest. I have analysed the problems existing in the study of elementary science which is being progressed in the proper educational institutes upon my investigation of the study from the following points of view : 1. Learning method in elementary science which pupils are desirous of. 2. Constitution of school course requested in the study of elementary science 3. Interest of the pupi1s in their study of elementary science. 4. Response shown by the parents of the pupils ill their own study of elementary science. As the result of my analysis mentioned above, the followinig problems have been detected : 1. The further pupils advance in their study of the subject, the more they are interested in independent study of method, and the more they are desirous of individual experiment needed in its study. 2. Questions, instructions, and demonstrations given on the part of teachers have great influences on durability of the pupils' interest and concern in consequence of their teaching methods. 3. The result of my analysis shows 5,2% of the pupils are fond of the subject, and 22,3% of them are not; (N=578) the followings are the reasons shown in otation as described : a. Contents of the subject are hard to make out. b. Vast bulk of contents of the subject is unbearable. c. Scientific terms used in the subject are inintelligible. d. The subject is uninteresting. The reasons of their being fond of the subject are : a. They have chances of conducting experiments and observation on the subject. b. They can enjoy pleasure experiments on the subject. 4. The subject meets with little response on the part of the parents on the occasion of their own study of the subject, proving of little service to them. The reasons ascertained are : a. They lack understanding of the contents of the subject. (54.2%) b. They can hardly afford to prepare for research materials (36.2%) This shows the fact that we can hardly warrant any sanguine expectations regarding their home learning of the subject, The following are methods of teaching conducted practically in order to solve the abovementioned problems, the result of which got the Pupils interested intensively in their study of the subject, bring on a remarkable change in their learning attitude : 1. Teaching method by funny form style ( applied by the lesson, "Light and Shawdgw", 2nd Pear grae) 2. Teaching method by vigorous mannerr of acfivity in teaching (applied by the lesson, ('Eleectric Current and Magnetic Field, 6th year grade) a. Investigation of the pupils, readiness. b. Presentation of phenomena for independent study of the subject. 3. Teaching method by analysis of teaching materials.

로봇 그립퍼의 악력 제어

윤동우,오성남,김갑일,손영익,임승철,강환일 明知大學校 産業技術硏究所 2007 産業技術硏究所論文集 Vol.26 No.-

In addition to accurate position and velocity control, force control is necessary for a successful robot operation. In this paper, we have designed a simple robot gripper using a DC motor. For its force control, a current feedback control law is presented without using additional force sensors. Experimental results prove the effectiveness of the proposed control law. A digital controller is also developed with a TMS320LF2406 processor.

혈전성 혈소판감소성 자반증으로 발현된 전신홍반루푸스 1예

오명근,유미라,변유미,윤찬영,권세훈,박치영,김상현 朝鮮大學校 附設 醫學硏究所 2007 The Medical Journal of Chosun University Vol.32 No.3

Thrombotic thrombocytopenic purpura (TTP) is a life-threatening syndrome characterized by the classic pentad of clinical features that includes microangiopathic hemolytic anemia, thrombocytopenia, neurologic abnormalities, fever, and renal dysfunction. Early diagnosis and utilization of plasmapheresis can improve the survival rates of patients with TTP. TTP rarely may be seen in association with autoimmune disease such as systemic lupus erythematous (SLE). We report here a 42-year-old female who was presented with severe digital gangrenes, microangiopathic hemolytic anemia, thrombocytopenia, neurologic abnormalities, fever, and renal dysfunction. Her condition responded to combined therapy with high dose steroid, immunosuppressants, and plasmapheresis therapy.

실험적 진폐증에서 투여약제에 따른 면역학적 병리학적 조직변화

윤임중,임현우,노영만,오상용,정장영,임영,김경아 가톨릭 대학 산업의학 쎈타 산업의학연구소 1993 韓國의 産業醫學 Vol.32 No.2

To access the effects of some drugs such as piperazine phosphare, azathioprine and allopurinol in the experimental pneumoconiosis, 263 rats weighted 240-320 gm was divided into the control and eight experimental groups. To each group, the turbid solution mixed free silica, talc and natural coal dust of 50 mg in 0.8 ml saline were instilled intratracheally. At the begining and 5th week of experiment, piperazine phosphate(8mg/week orally), aspirin(1.5mg/day intramuscularly), azathioprine(25mg/day orally) and allopurinol(1.5mg/day orally) were administered simultaneously, while the dust turbid solution was only given to the control group. For each group the change of body weight. dry right lung weight, cellularity including total cell, macrophage, lymphocyte and neurtrophil in bronchoalveolar lavage fluid, superoxide ion, hydroxyproline, leukotriene B₄, tumor necrotsis factor, prostaglandin E₂were examined, and observed the pathological chages in lung tissue. The results were as follow : 1. The larger amount of their instilled dust and the longer observation period, the severer pathological findings were found in the lung tissue of each experimental group. 2. The body and dry right lung wight was not significantly changed in the experimental groups compared with the control group. 3. The number of total cell in bronchoalveolar lavage fluid was markedly less in the experimental group than the control one, while no significant difference was found in the percent alveolar macrophages and lymphocytes in both groups. However, the percent of neutrophiles was usually lower than in the control group. 4. The amount of superoxide ion was frequently less in the experimental group compared with the control one. 5. The amount of hydroxyproline was significantly lower in the experimental group than in the control one. 6. The amount of leukotriene B₄was usually less in the drug administered group than in the control one. 7. The amount of tumor necrotic factor was also frequently lower in each experimental group than in the control one. 8. The amount of prostaglandin E₂was usually higher in each experimental group than in the control one.

정신과 환자에서 간이정신진단검사의 요인구조

오상우,김윤희,고효선,이상열,노승호 圓光大學校 醫科學硏究所 2008 圓光醫科學 Vol.23 No.2

배경: 본 연구는 SCL-90-R에서 9개 증상차원의 요인구조가 어떻게 나타나는지를 알아보는 데 목적이 있다. 방법: SAS 프로그램을 이용하여 정신과적 장애로 진단받은 환자 188명이 수행한 SCL-90-R 자료의 요인구조를 분석하였다. 결과: 요인분석 결과 SCL-90-R의 9개 증상차원은 단일요인으로 나타났다. 결론: SCL-90-R의 요인분석 결과 단일 요인 모형이 탐색되었다. 추후 연구에서는 SCL-90-R의 9개 척도에 대한 확인적 요인분석이 필요할 것으로 생각된다. Background: To find of this study was to find exploratory factor analysis of the nine scales of the Symptom Checklist-90-Revision(SCL-90-R). Methods: This study was investigated the factor structures of nine scales of the SCL-90-R in 188 patients with psychiatric disorders using SAS 8.02 software. Results: The factor structure showed that the factor structures of nine scales of the SCL-90-R had one factor. Conclusion: The factor structures showed that the factor structures of the SCL-90-R had one factor. Further research is nedeed about confirmatory factor analysis of the nine scales of the SCL-90-R.