상수원수의 효과적인 정수처리를 위한 최적 응집제 주입량 결정 : Ⅲ. The Effect of Coagulant Aid Dose Ⅲ. 응집보조제 주입효과

손보균,허재선,조주식 順天大學校 1999 論文集 Vol.18 No.1

This study was conducted to determine the optimum amounts of coagulant for effective treatment of raw water. To avoid overdosing coagulants in case of low turbidity of raw water, the removal rate of turbidity and particle size distribution of flocs were investigated after addition of coagulant aids such as lime and coagulated sludges. When lime was used as a coagulant aid, the maximum removal rate of turbidity was found to be 93% by addition of 20ml/ℓ of lime in combination with 35mg/l polyaluminum chloride(PAC) as a coagulant. At the settling time of 8 min, more than 82% of suspended solids showed the particle size of less than 10㎛ and -7.4mV of zeta potential. It was found that increase in lime addition enhanced the removal efficiency of turbidity, but had no effect on reduction in lime addition enhanced the removal efficiency of turbidity, but had no effect on reduction in coagulant dosage. When coagulated sludges was employed as the aid, the maximum removal rate of turbidity was found to be 82% by addition of 20mg/l of the sludges in combination with 25mg/l PAC as a coagulant. At the settling time of 8 min, about 80% of suspended solids showed the particle size of less than 10um and +3.8mV of zeta potential. Zeta potential decreased with increasing amounts of coagulated sludges and PAC. Addition of coagulated sludges increased the removal rate of turbidity in the water and, at the same time, reduced the amounts of coagulant added.

노면표시 제거 자동화 장비개발을 위한 작업공정분석

한재구,김균태,권순옥,함영복 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1

Present removal work for road signs has been required many workers and times because it has been worked by a manually controlled shaving equipment. While these manual works are progressing, there are unwillingly traffic jam by passing control, and unexpected accidents to all workers exposed dangerous road circumstance. Besides, in current shaving method, there are high potentialities on air pollution as well as explosive accidents occurred by using propane gas. However there have been little efforts to improve technical impediments and to develop a new method or equipment related to the road sign erasing works in domestic construction industry. The purpose of this study is to investigate the road sign erasing work processes of the existing in detail and to analyze the required performance criteria for the automated equipment development.

신경망을 이용한 내용기반 이미지 분류

이재원,강홍식,김상균 인제대학교기초과학연구소 2001 자연과학 Vol.5 No.-

본 논문에서는 내용기반 이미지 검색의 한 방법론으로써 웨이블릿 변환과 신경망을 이용한 방법을 제안한다. 분류 대상 이미지는 인터넷상의 다양한 이미지 중 전경과 배경의 구분이 뚜렷한 객체 이미지이다. 분류를 위한 특징은 웨이블릿 변환 후 추출된 형태 특징과 질감 특징을 이용한다. 추출된 특징 값들을 이용하여 이미지들에 대한 학습 패턴을 생성하고 신경망을 학습하여 분류기를 구성한다. 본 연구에서는 다양한 질감 특징 중 가장 높은 인식률을 보여주는 대비를 사용하였으며, 신경망의 학습 알고리즘은 역전파 알고리즘을 사용하였다. In this paper, we propose a method of content-based image classification using waveiet transform and neural network. The images for classification are object images that can be divided into foreground and background. Features for the classification are texture and shape features extracted from wavelet transformed image. The neural network classifier is constrycted with the extracted features and the back-propagation learning algorithm. Among the various texture features, the contrast was more effective.

신경망과 웨이블릿 변환 기반의 이미지 분류기 구현

이재원,심재원,한병철,김상균,서재현 인제대학교 기초과학연구소 2000 자연과학 Vol.4 No.-

본 논문에서는 신경망과 웨이블릿 변환을 이용한 이미지 분류 시스템을 제안한다. 분류 대상 이미지는 인터넷상의 다양한 이미지이며 웹 에이전트를 구현하여 획득하고 정규화과정을 거친다. 분류를 위한 특징은 웨이블릿 변환 후 추출된 질감 특징이다. 이러한 질감 특징을 이용하여 이미지들에 대한 학습 패턴을 생성하고 신경망을 학습한다. 구성한 신경망 분류기로 이미지들을 분류하여, 그 결과를 이미지 데이터베이스에 저장하고 웹사이트 검색 서비스에 사용한다. 본 연구에서는 다양한 질감 특징 중 가장 높은 검색 결과를 보여주는 대비(Contrast)를 사용하였으며, 신경망의 학습 알고리즘은 역전파 알고리즘을 사용하였다. In this paper, we propose an image classification system based on neural network and wavelet transform. The classifier deals with the various images on the Internet and the images are obtained and normalized with a Web agent. A feature for the classifier is a texture feature extracted from a wavelet transformed image. The features are used as training patterns for the neural network classifier. The results of the classifier are saved to the image database for website search service. We used the contrast out of many kinds of texture features and the back-propagation algorithm as the texture feature and the classifier learning algorithm, respectively.

CORBA 기반의 분산 객체 관리 모델 구현

강재효,서재현,김상균 인제대학교 1998 仁濟論叢 Vol.14 No.1

본 논문에서는 CORBA(Common Object Request Broker Architecture) 객체의 관리를 위한 ObjectMonitor의 설계를 제안한다. 본 ObjectMonitor의 특징을 요약해 보면 다음과 같다. 첫째는 URN(Uniform Resource Name)기반의 객체에 대한 위치 투명성은 물론 한 단계 추가된 추상화기법을 통해 위치 독립성을 제공한다. 둘째는 서버들간의 부하 분담(Load Balancing)을 위한 정책을 쉽게 그리고 동적으로 제공한다. 셋째는 오브젝트의 오류 상황을 체크하여 제어할 수 있는 기능을 첨가함으로써 결함 허용(Fault Tolerant) 시스템을 지원한다. 이런 특징들을 바탕으로, 제안된 ObjectMonitor는 이질의 분산환경에서의 신뢰성을 부여하고, 확장이 용이하며, 또한 객체의 이동성을 제공한다. 이런 특성은 클라이언트와 서버간의 고품질의 서비스 제공을 가능하게 한다. This paper proposes a design of ObjectMonitor to manage CORBA(Common Object Request Broker Architecture) Object. The features of this ObjectMonitor are: 1) this provides not only Location Transparency of object based on URN (Uniform Resource Name) but also Location Independence through the abstract technics developed one more level; 2) it provides the policy for Load Balancing among servers easier and dynamically; 3) it supports Fault Tolerant System by adding functions that detect the error situations and fix them. The ObjectMonitor gives reliability in different distributed environment, and makes it easy to extend, and provides migration of objects. These kinds of features make it possible to give high quality service between Client and Server. Moreover, performing real-time object management dynamically, we get synergy that real time Load Balancing Policy can be used easily.

Paraquat 투여로 인한 흰쥐 폐장변화에 대한 면역 조직화학적 연구

도재원,김의한,강상균 순천향대학교 1992 논문집 Vol.15 No.2

Paraquat에 의해서 유발되는 간질 및 폐포내 섬유조직 증식증의 진행과정을 알아보기 위하여 20마리의 흰쥐를 대상으로 10mg/kg, 20mg/kg를 복강내 주사하고 3일, 5일, 7일, 10일, 15일 간격으로 폐장을 적출하여 조직학적 및 면역조직 화학적 방법을 통해 관찰하여 다음과 같은 결론을 얻었다. 1. 10mg/kg를 투여한 군에서는 뚜렷한 손상을 보이지 않고 7일후에는 거의 정상으로 나타나 Paraquat에 의한 독성 효과는 투여된 양에 의존됨을 알 수 있었다. 2. 나타나는 폐장의 변화는 2단계로 분류될수 있는데 폐포내에 출혈, 부종 및 초자막 형성은 초기에 나타나는 병변이었으며, 간질 및 폐포내 섬유 조직 증식증은 후기에 나타나는 병변으로 일반적인 급성 호흡곤란 증후군때 보이는 소견과 비슷하였다. 3. 관찰 초기부터 폐포세포 Ⅱ형의 증식이 나타나는 것으로 보아 중독 초기에 이미 폐포세포 Ⅰ형에 손상이 나타남을 알 수 있었다. 4. 간질 및 폐포내 간엽조직은 시간이 경과됨에 따라 Vimentin에 강하게 염색되는 것을 볼 수 있는데 이는 간질 및 폐포내 섬유조직 증식증이 시간 경과에 따라 진행되고 있음을 의미한다. 5. 7일 이후에 상피세포가 다시 EMA에 강한 양성 반응을 보였으며 이는 이들 세포들이 재생되고 있음을 뜻하고 있으나 더욱 시간을 두고 관찰 할 필요가 있다고 본다. To investigate the progress of the Paraquat-induced pulminary interstitial and intralveolar fibrosis, 10 white rats were administered 10mg/kg and 10 white rats were administered 20mg/kg of Paraquat intraperitoneally. Three, five, seven, ten and fifteen days after this injection, the rats were sacrificed. The removed lungs were evaluated by immunohistological and histological study, so following results were obtained. 1. Toxic effects of Paraquat seem to depend on the dose of administrated Paraquat since the groups of rats treated with 10mg/kg revealed no significant tissue damage after 7 days. 2. The pulmonary changes by Paraquat can be classified into two stages : the early change such as hemorrhage, edema and hyaline membrane formation, and the late change characterized by interstitial and intra-alveolar fibrosis. These changes are similar to the findings observed in acute respiratory distrees syndrome. 3. Proliferation of Type Ⅱ alveolar cell at the time of the initial observation (3days) suggested that the damage of type Ⅰ alveolar cell had been occured prior to observation. 4. Strong Vimentin positive staining of the interstitial and intra-alveolar mesenchymal cell with time indicated the progression of the interstitial and intra-alveolar fibrosis. 5. Strong positive reaction of epithelial cells to EMA after 7 days of Paraquat adminstration indicated the regeneration of these cells. However, due to short duration of observation, it was hard to obtain conclusion whether this regeneration completed or not.

야뇨증 환아들의 심리사회적 특성에 대한 다기관 연구 : 행동 및 정서 문제를 중심으로

조수철,김재원,신민섭,황준원,한상원,박관현,이상돈,김경도,김건석,서홍진,이유식,정재용,김영균,문두건,남궁미경,한창희,조원열,김영식,배기수,이종국,정우영,신의진 大韓神經精神醫學會 2005 신경정신의학 Vol.44 No.6

Objectives : The aim of this study was to examine the behavioral and emotional problems associated with nocturnal enuresis in Korean children. Methods : Three hundred eighteen children with nocturnal enuresis, together with their parents, completed the Child Behavior Checklist (CBCL), Disruptive Behavior Disorder Scale according to DSM-IV (DBDS), Children's Depression Inventory (CDI), State-Trait Anxiety Inventory for Children (STAIC), and Piers-Harris Children's Self-Concept Scale (PHCSC). Ninety-three normal students were selected as the control group. Results : Compared to the normal control group, the mean scores with regard to the withdrawn, social problems, attention problems, delinquent behavior, aggressive behavior, externalizing problems and total problems profiles were significantly higher in the nocturnal enuresis group according to the CBCL results. The nocturnal enuresis group also scored significantly higher in the ADHD and ODD profiles of the DBDS. The nocturnal enuresis group was more depressed and anxious than the control group according to the results of the CDI and STAI. The mean score of the PHCSC was significantly lower in the nocturnal enuresis group when compared to the normal control group. Conclusion : The results of this study suggest that children with nocturnal enuresis in Korea have clinically relevant behavioral and emotional problems. The findings support the link between nocturnal enuresis and psychopathology in Korean children.

정신분열병 환자의 인지과제수행에서 삼차원적 시공간-운동 방해자극 처리의 특성

정혜정,김재진,박성혁,전종희,김지혜,염태호,이장한,김선일,구정훈,조원근,안석균,이홍식 大韓神經精神醫學會 2003 신경정신의학 Vol.42 No.2

Objectives : Abnormalities of cognitive responses to verbal and visual distracter in schizophrenia have been demonstrated in numerous studies but little is known about three dimensional visuospatial-motor distracter processing. The purpose of this study was to investigate the vulnerability of patients with schizophrenia to three dimensional visuospatial-motor distracter. Methods : 14 patients with schizophrenia and 14 normal volunteers were assessed on three dimensional maze tasks requiring on working memory and reasoning ability in the virtual reality environment. Performances were compared according to with- or without-distracter conditions. Results : Patients with schizophrenia showed significantly lower performances than normal control group on cognitive flexibility, simple motor function or motor control and motor coordination, working memory span and delayed performance times. The performance index tended to be more deteriorated, but not significantly, in with-distracter condition than in Without-distracter condition in schizophrenia. Conclusions : Patients with schizophrenia tend to be vulnerable to visuospatial-motor distracter which simulate the real world of three dimensional environment.

만성 강박장애 환자의 정서처리 특성 : 정신분열병 환자 및 정상인과의 비교

석정호,김재진,전종희,이홍식,안석균,이은,김찬형 大韓神經精神醫學會 2005 신경정신의학 Vol.44 No.3

Objectives : Obsessive compulsive disorder (OCD) tends to take chronic course as schizophrenia. Researchers reported that OC patients had idiosyncratic sensitivity to threat-related information, while schizophrenic patients were reported to have affec-tive blunting. We hypothesized that there might be a difference in emotional response between OCD and SPR in cronic phase. Methods : Eight different emotional tasks were done by 25 healthy controls, 21 OCD patients and 25 SPR patients. Visual stimuli were made by pairing two words or pictures. Four kinds of emotional stimuli (positive, negative, combined and neutral)were presented to subjects through monitor and they were asked to report their subjective feelings by pushing mouse button, In the combined condition, a pair of positive words (or pictures) and negative words (or pictures) were presented simultaneously. The responses and response time were recorded and analyzed using SPSS 9.0 package. Results : In the negative condition, OCD group didn't show any deficit compared to healthy group. But SPR group showed significantly lower appropriate response rate than healthy group, In the combined condition, OCD and healthy control group Showed 'negativity bias' which SPR group didn't show. In the positive condition, however, OCD and SPR groups did show Significantly lower appropriate response rate than healthy controls. Conclusion : Our results suggested that OCD patients may not have deficits in the processing of negative emotion even in the chronic phase but to have a specific deficit in positive emotion. This result supports the 'threat-relatedness hypothesis' on attentional bias of OCD.

南海島(慶南·南海郡)主民의 肺디스토마 感染率 및 中間宿主 調査報告

安泳謙,徐載均,林泓正 최신의학사 1966 最新醫學 Vol.9 No.11