축산농가에서 배출되는 비점오염 물질이 소규모 유역에 미치는 영향

이수인,신민환,전제홍,박병기,이지민,원철희,최중대,Lee, Su In,Shin, Min Hwan,Jeon, Je Hong,Park, Byeong Ky,Lee, Ji Min,Won, Chul Hee,Choi, Joong Dae 한국농공학회 2015 한국농공학회논문집 Vol.57 No.2

The objective of this paper was to quantitatively analyze the effect of concentrated animal feeding operations (CAFO) NPS pollution on a small watershed water quality. Monitoring was conducted from March to October, 2013. Monthly flow rate and selected water quality at each monitoring site were measured during dry days. Rainy day monitoring also was conducted. Modeling was conducted to evaluate the effect of CAFO NPS pollution on the water quality at the watershed outlet. The highest and mean concentration of selected water quality indices during rainy days were higher than those in dry days in general. The highest TN concentration measured at the CAFP pollution discharge point was 237.831 mg/L. The results revealed that the CAFO NPS pollution sources could be equally blamed for the water quality degradation of the stream. However, the effect of the NPS pollution from CAFOs seemed not to be very influential to the watershed water quality at the outlet. SWAT modeling revealed that the TN load was reduced by 18.95 %, 23.39 % and 30.53 % at the watershed outlet if the TN load at the CAFO NPS pollution discharge point reduced by 20 %, 40 % and 60 %, respectively. It was thought that the natural attenuation processes played an important role. The modeling was based only on the assumption of the load reduction and not verified by the monitored data. Therefore, it was suggested that a long term monitoring studies for the evaluation of the impact of CAFO NPS pollution on the watershed water quality be conducted.

장기 모니터링을 통한 고랭지 밭 지역의 비점오염물질 유출특성

이수인,신재영,신민환,주소희,서지연,박운지,이재영,최중대,Lee, Su In,Shin, Jae Young,Shin, Min Hwan,Ju, So-Hui,Seo, Ji Yeon,Park, Woon Ji,Lee, Jae Young,Choi, Joong Dae 한국농공학회 2017 한국농공학회논문집 Vol.59 No.4

In this research, I performed rainfall monitoring by selecting the spot which can represent high altitude cool farm region in recent 3 years, and tried to understand the characteristic of outflow of non-point pollutants coming from high altitude cool farm region. As a result, it was shown that reducing rainfall runoff in highland farm area can reduce non-point pollution load and should consider priority to reduce runoff through management resources when selecting abatement method. Additionally, it is judged that reduction method related to base run-off should be selected by performing research on material motion of TN.

치아염소산염용액이 치주낭 상피조직 및 치은창상 치유에 미치는 영향에 관한 전자현미경적 연구

이수인,Lee, Su-In 대한치주과학회 1983 Journal of Periodontal & Implant Science Vol.13 No.1

수면전일 수면제를 필요로 하는 환자들의 특성

이수인,윤진상,이형영,Lee, Soo-In,Yoon, Jin-Sang,Lee, Hyung-Young 대한수면의학회 1997 수면·정신생리 Vol.4 No.2

본 연구는 수술전일 수면제 필요군의 특성을 파악하고 수면제의 필요성에 기여하는 변인들의 상대적인 중요성을 알아보고자 하였다. 연구자는 수술이 예정된 환자들의 병록지를 검토한 후 반구조적 면담을 시행하였다. 또한 환자에게는 불안, 우울, 통증의 정도를 측정하는 자가평가 질문지와 수면 전 후 설문지를 작성토록 하였다. 설문지에 성실히 응답한 167 명의 환자를 수술당일 기상 후 지난 밤 수면제의 복용이 필요했다고 판단하는 환자군(수면제 필요군)과 필요하지 않았다고 판단한 군(수면제 불필요군)으로 분류한 다음, 양군간에 인구통계학적 특성, 임상적 특성, 수면에 영향을 줄 수 있는 가능한 인자, 심리적 특성, 수술전 주간 상태와 야간 수면 등을 비교하였다. 양군간에 유의한 차이를 보인 변인들에 대해서는 수면제 필요군을 특징짓는 변인들의 예측기여도를 측정하기 위해 판별분석을 하였다. 연구결과는 수면제 필요군과 불필요군 간에 인구통계학적 특성 및 임상적 특성은 차이가 없었다. 그러나 병실환경에 대한 만족도는 수면제 필요군에서 불필요군에 비해 낮았다. 심리적 특성에서 불안의 정도는 양군간에 차이가 없는 반면에, 우울과 통증의 정도는 수면제 필요군이 불필요군에 비해 더 심하였다. 수술전일의 야간 수면에서도 수면제 필요군이 취침 전 수면에 대한 기대가 더 부정적이었고, 실제로 다음날 아침 전일의 수면을 더 불량하게 평가하였다. 판별분석의 결과, '수면에 대한 기대도'와 '통증'이 수면제 필요성을 판별하는 중요한변인이었다. 이상의 결과로 수술전일의 불면을 개선하기 위한 수면제나 진통제의 투여는 치료자의 판단이나 다른 객관적인 지표보다는 수면제의 필요성에 대한 환자 자신의 주관적인 의견이 더 중시되어야 할 것이다. Objects : This study was carried out to investigate characteristics of patients who need hypnotics on the night before elective surgery as well as contributing variables for the necessity of hypnotics. Methods : After reviewing the clinical charts of patients who were scheduled to receive surgery by general anesthesia the following day, researchers had semi structural interviews with patients. In addition, Spielberger's State-Trait Anxiety Inventory(SSTAI), Beck Depression Inventory(BDI), Zung's Self-Rating Pain and Distress Scale(ZPDS), and Presleep and Postsleep Questionnaires were administered to patients. A total of 167 patients, who gave reliable information, were divided into two groups based on subjective judgement regarding the necessity for hypnotics on the night before surgery; 29 eligibles for hypnotics and 138 non-eligibles for hypnotics. Demographic and clinical characteristics of patients, some possible factors affecting sleep, psychological characteristics of patients and daytime status and nighttime sleep before surgery were compared between the two groups. In addition, discriminant function analysis was done to find the variables which would best discriminate among patients who differ in terms of necessity for hypnotics on the night before surgery. Results : There was no difference in demographic and clinical characteristics between the two groups; however, the satisfaction level with ward environment was significantly lower in the eligible group for hypnotics than the non-eligible group. Psychologically, the eligible group for hypnotics, compared to the non-eligible group, showed significantly more severe depression, pain, and distress; whereas anxiety level was not different between the two groups. For nighttime sleep before surgery, the eligible group for hypnotics, compared to the non-eligible group, expected poorer sleep before retiring and in fact, reported poorer sleep the following morning. In discriminant function analysis, 'expectation for sleep' and 'pain and distress' were the most potent contributors to discriminate the necessity of hypnotics. Conclusion : For the improvement of the patient's sleep on the night before elective surgery, giving hypnotics and/or analgesics should be determined by patient's opinion about the necessity of the drugs rather than by the therapist's own judgement or any other objective indices.

길쌈부호의 부등오류제어 특성

이수인,이상곤,문상재,Lee, Soo-In,Lee, Sang-Gon,Moon, Sang-Jae 대한전자공학회 1990 전자공학회논문지 Vol. No.

부호율 r=b/n인 2진길쌈부호의 부등 비트오류 제어특성을 해석한다. Viterbi 복호되어 나온 b비트로 구성된 정보벡터에서 각 비트가 갖는 오류확률은 서로 다를 수 있다. 따라서 각 비트의 오류제어 성능은 그외 다른 비트의 오류제어 성능과 다를 수 있다. 이러한 부등 비트 오류특성은 DPCM 시스템의 표본 데이타를 전송할 때 전송상에서 신호대 잡음비의 개선을 위해 적용될 수 있다. The unequal bit-error control of rate r=b/n binary convolutional code is analyzed. The error protection afforded to each digit of the viterbi decoded b-tuple information word can be different from that afforded to other digit. The property of the unequal protection can be applied for improvement of SNR in transmitting sampled data of DPCM system.

무경운 밭에서의 비점오염물질 저감효과 분석

이수인,원철희,신민환,신재영,전제홍,최중대,Lee, Su In,Won, Chul Hee,Shin, Min Hwan,Shin, Jae Young,Jeon, Je Hong,Choi, Joong Dae 한국농공학회 2015 한국농공학회논문집 Vol.57 No.4

Various Best Management Practices (BMPs) have been suggested to reduce soil erosion and non point source (NPS) pollutant loads from agricultural fields. However, very little research regarding water quality improvement with No-till (NT) has been performed in Korea. Thus, effects of NT were investigated in this study. The objective of the study was to investigate the effect of NT on the surface runoff and sediment discharge in a field. Eight experimental plots of $5{\times}30m$ in size and 3 % or 8 % in slope prepared on gravelly sandy loam soil were treated with Conventional-till (CT) and NT. Runoff and NPS pollution discharge were monitored and compared the treatments. The amounts of rainfall from 13 monitored events ranged from 28.7 mm to 503.5 mm. The runoff amount was reduced by 17.6~59.2 % in 3 % NT and 29.6~53.2 % in 8 % NT. The average NPS pollution loads of the 3 % NT plots and 8 % NT plot were reduced about 45.1~89.2 % and 47.7~98.0 % compared to those of the CT plots, respectively. This research revealed that NT can reduce the NPS pollution loads substantially as well as increase the crop yield. Runoff and NPS pollution loads reduction by NT method could be contribute to improve the water quality of streams in agricultural regions.

다중 체온 감지용 지능형 카메라 개발

이수인,김윤수,석종원,Lee, Su-In,Kim, Yun-Su,Seok, Jong-Won 한국전기전자학회 2022 전기전자학회논문지 Vol.26 No.3

In this paper, we propose an intelligent camera for multiple body temperature detection. The proposed camera is composed of optical(4056*3040) and thermal(640*480), which detects abnormal symptoms by analyzing a person's facial expression and body temperature from the acquired image. The optical and thermal imaging cameras are operated simultaneously and detect an object in the optical image, in which the facial region and expression analysis are calculated from the object. Additionally, the calculated coordinate values from the optical image facial region are applied to the thermal image, also the maximum temperature is measured from the region and displayed on the screen. Abnormal symptom detection is determined by using the analyzed three facial expressions(neutral, happy, sadness) and body temperature values. In order to evaluate the performance of the proposed camera, the optical image processing part is tested on Caltech, WIDER FACE, and CK+ datasets for three algorithms(object detection, facial region detection, and expression analysis). Experimental results have shown 91%, 91%, and 84% accuracy scores each.

결로방지를 위한 공용배기 활용 환기 시스템의 습도저감 성능 분석

이수인(Suin Lee),최경석(Gyeong-Seok Choi),이용준(Yong Jun Lee),이현화(Hyun-Hwa Lee) 대한설비공학회 2021 설비공학 논문집 Vol.33 No.2

In order to prevent condensation, it is necessary to remove water vapor through ventilation. In this study, we proposed a hybrid ventilation system in which natural ventilation and cen-tralized exhaust fan (VCE) ventilation systems are linked, and then compared the air flow of the natural ventilation system and the VCE system using a Computational fluid dynamics (CFD) model. The possibility of condensation was analyzed according to the systems’ chang-es in temperature and relative humidity, and the temperature and the humidity of the ventila-tion systems were directly measured within apartment houses. The results revealed that the ventilation volume of the whole household measured at 0.15 ACH when the natural ventila-tion was applied, and 0.50 ACH when the VCE system was applied. The average indoor air temperature only decreased by 1℃ when VCE was applied, indicating a very slight differ-ence when compared to the natural ventilation system. In addition, the result of analyzing the relative humidity distribution shows that the local relative humidity exceeded 100%, and that condensation conditions were formed when the natural ventilation system was applied. How-ever, the relative humidity distribution was even, and less than 100%, when the VCE system was applied, indicating a low probability of condensation. The results of analyzing the dif-ferences in average indoor air temperature with the VCE system shows that the air tempera-ture was measured to be 1.9℃ lower in the living room, and 2.27℃ lower in the laundry room, the balcony, and the evacuation space, than the air temperatures achieved with the nat-ural ventilation system. As a result of measuring the levels of absolute humidity, the average absolute humidity with the shared exhaust ventilation system was lower by 44.56% in the liv-ing room, the laundry room, and the evacuation space, when compared to the humidity of the natural ventilation opening case. Therefore, the results revealed that the humidity reduction performance was improved when the shared exhaust ventilation system was applied, when compared to the natural ventilation system, which could be effective in the prevention of condensation.

CO₂농도 상승과 온도 상승조건에서 광, 수분, 유기물구배에 따른 멸종위기식물인 황근(Hibiscus hamabo)의 생육과 생태적 지위폭의 변화

이수인 ( Soo-in Lee ),이응필 ( Eung-pill Lee ),김의주 ( Eui-ju Kim ),박재훈 ( Jae-hoon Park ),조규태 ( Kyu-tae Cho ),이승연 ( Seung-yeon Lee ),유영한 ( Young-han You ) 한국환경생태학회 2017 한국환경생태학회지 Vol.31 No.3

CO₂농도와 온도의 상승으로 인한 지구온난화가 진행되었을 때 광, 수분 그리고 유기물 구배에 따른 멸종위기식물인 황근의 생육과 생태적 지위폭의 변화를 알아보았다. 대조구(야외)와 처리구(CO₂ + 온도 상승구)로 나누어 각각 광, 수분 그리고 유기물구배를 두어 재배하였다. 그 연구결과, 황근은 낮은 광량보다 높은 광량을 선호하나, 광량이 787±77.76μmol m^-2s^-1을 넘어가면 높은 광량이라 하더라도 생육이 어려웠다. 또한 유기물이 없거나(0%) 너무 많은 토양(20%)에서는 생육이 어려웠다. 그러나 수분 구배에 따른 경향이 보이지 않았다. 황근의 고사율은 대조구보다 처리구에서 광량이 높은 조건을 제외한 모든 구배에서 높았다. 이는 CO₂와 온도가 상승하면 광에 대한 내성범위가 좁아진다는 것을 의미한다. 대조구와 처리구를 비교하였을 때, 수분구배에 따른 경향은 보이지 않았다. 유기물구배에서는 대조구보다 처리구에서 모두 고사율이 낮았는데, 이는 유기물에 대한 내성의 범위가 넓어진 것을 의미한다. 황근의 생태적 지위폭은 처리구가 대조구보다 광 구배에서 30.1% 좁아졌으며, 수분 구배에서 8.6% 그리고 유기물 구배에서 30% 넓어졌다. 따라서 CO₂농도와 온도의 증가로 인한 지구온난화가 진행되면, 황근의 생육은 광량에 의해서 제한될 것으로 판단된다. We investigated growth response and variation of ecological niche breadth of Hibiscus hamabo according to light, moisture and nutrient when global warming is proceeded by elevated CO₂ concentration and temperature. H. hamabo was cultivated in experimental condition in the greenhouse that are divided by control(ambient condition) and treatment(elevated CO₂ concentration and temperature). Light, moisture and nutrient gradients were treated within the control and the treatment. Although H. hamabo prefers higher light intensity(up to L3) to lowers`, Hamabo mallow doesn`t like excessive light intensity(787±77.76μmol m^-2s^-1). Also, H. hamabo was difficult to grow in absent nutrient(0%) and excessive nutrient(20%). However, there was no trend with moisture gradients. The death rate of H. hamabo in the treatment was higher in all gradients except for the highest light intensity condition than control. It means that range of tolerance about light is narrowed when concentration of CO₂ gas and temperature is elevated. There was no trend of death rate according to moisture gradient, comparing between control and treatment. The death rate in all nutrient gradients within the treatment is lower than the controls`. It means that range of tolerance about nutrient is widened. The ecological niche breadth of H. hamabo in the treatment was narrower as 30.1% in light gradients but wider as 8.6% in moisture gradients and 30% in nutrient gradients than in the control. In the conclusion, when global warming is proceeded by elevated CO₂ concentration and temperature, growth of H. hamabo would be restricted by light intensity.

의류제품에 대한 소비자 고발실태 분석

이정순(Lee, Jung Soon),이현영(Lee, Hyun Young),이현자(Lee, Hyun Ja),송경자(Song, Kyeong Ja),김희숙(Kim, Hea Suk),서미영(Seo, Mee Young),이수인(Lee, Soo In) 한국생활과학회 2000 한국생활과학회지 Vol.9 No.1