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 Results : Compared to the normal control group, the mean scores with regard to the withdrawn, social problems, attention problems, delinquent behavior, aggressive behavior, externalizing problems and total problems profiles were significantly higher in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.

성견에서 수직적 골결손부에 골이식후 교정력 적용시기에 따른 치주조직의 반응

이상열,황현식,김경근 전남대학교 치과대학 2000 전남치대논문집 Vol.12 No.1

The aim of this study was to investigate the periodontal response according to the timing of orthodontic force application after bone graft into the angular bony defect. Nine dogs were divided into three groups, 2, 4, and 6 weeks, according to the timing of orthodontic force application after bone graft. Periodontal angular bony defects were created surgically at the distal aspect of both maxillary third incisors. Two weeks later, flap operation was performed to eliminate inflammation and reference notch was made on the root surface at the level of the bottom of each defect. Demineralized freeze-dried bone was implanted on the left side whereas only debridement was done on the other side. Experimental tooth movement was executed during 8 weeks on both graft and non-graft sides. After 2 weeks of retention period, animals were sacrificed for histologic specimens. The results were obtained as follows: 1. New bone formation was more pronounced in the graft side than in the non-graft side in all experimental animals. 2. In the 6-week group, new bone and cementum formation was observed in more than half from the notch to the cemento-enamel junction, and the zone of connective tissue attachment was found without apical migration of junctional epithelium. 3. In the 4-week group, the amount of new bone formation was smaller than in the 6-week group whereas the overall remodeling pattern was similar. 4. New bone formation was confined to around the notch and the junctional epithelium migrated apically to the level of the notch with no connective tissue attachment and cementum formation in the 2-week group. The results of the present study suggest that periodontal response may be influenced by the timing of orthodontic force application after bone graft into angular bony defect.

농작물 해충 및 진균류 방제를 위한 방선균의 분리 및 동정

이은정,강경돈,황교열,김두호,김신덕,성수일 한국잠사학회 1998 한국잠사곤충학회지 Vol.40 No.1

Twenty seven out of ca. 5,000 actinomycete strains, which were isolated from soil collected throughout the country, showed antimicrobial effects against fungi, Rhizopus stronifer (ATCC6227a), Rhizoctonia solani (KCCM 11271) and yeast, Candida albicans(ATCC10231). From these antifungal microorganisms, we further selected seven strains which seemed to produce insecticidal substances with in vivo test, using silkworm, Bombyx mori and beet armyworm, Spodoptera exigua. Morphological and biochemical experiments revealed that three strains out of seven were streptomyces. Further investigations on the physical and chemical properties of these antifungal and insecticidal substances are now in progress.

C54x DSK를 이용한 디지털 오실로스코프의 구현

이경화,정혜윤,신건일,권호열 江原大學校 産業技術硏究所 1997 産業技術硏究 Vol.17 No.-

In this paper, a digital oscilloscope is implemented using a C54x DSk with PC. This digital oscilloscope has some basic measurement functions with a capability to change Volt/Div and Time/Div as well as to set appropriate trigger level automatically. Also several stored waveforms and current input waveform can be displayed simultaneously. Experimental results show that our approaches are versatile and cost-effective particularly in educational installment.

TiO₂-ZrO₂와 γ-Al₂O₃에 담지된 Co-Mo 촉매의 특성비교 및 수첨탈황반응에 관한 연구

김경림,고을석,박해경,이재열 연세대학교 대학원 1993 延世論叢 Vol.29 No.1

Hydrodesulfurization of thiophene were studied over Co- Mo/TiO2- ZrO2 and Co-Mo/γ-Al2O3 catalysts. Under the experimental conditions of this study, the surface area, acidity and acid strength of TiO2- ZrO2 support were similar to those of γ-Al2O3 support. Characteristics of Co-Mo/TiO2-ZrO2 catalyst were similar to that of Co-Mo/γ-Al2O3 Catalyst, too. Under the atmospheric pressure, thiophene conversion increased with increasing temperature over both Co-Mo/TiO2-ZrO2 and Co-Mo/γ-Al2O3 catalysts, and the increasing rate of thiophene conversion over Co-Mo/TiO2-ZrO2 catalyst was higher than that of Co-Mo/γ-Al2O3 catalyst with increasing temperature.

초음파 검사 기반의 용접결함 분류성능 개선에 관한 연구

김재열,윤성운,김창현,송경석,양동조,--,-- 한국공작기계학회 2004 한국공작기계학회 춘계학술대회논문집 Vol.2004 No.-

In this study, we made a comparative study of backpropagation neural network and probabilistic neural network and bayesian classifier and perceptron as shape recognition algorithm of welding flaws. For this purpose, variables are applied the same to four algorithms. Here, feature variable is composed of time domain signal itself and frequency domain signal itself. Through this process, we comfirmed advantages/disadvantages of four algorithms and identified application methods of four algorithms.

피지선 모반에서 발생한 유두상 한선종 1예

성열오,서무규,문형도,박기흠,이창우,이경섭 동국대학교 경주대학 1993 東國論集 Vol.12 No.-

Syringoadenoma papilliferum occurs as a solitary lesion appearing usually on the scalp. It's origin is not definitely known, and about one-third of cases are associted with nevus sebaseous. We describe a case of syringoadenoma papillferum associated with nevus sebaseous in a 29 year-old female who had developed bean sized verrucotic nodules on the Rt. temporal area of the scalp since 6 years after removal of nevus sebaceous. Histopathologic findings showed hyperkeratosis, acanthosis and villi that projected into a cystic lumen. And the villi were surrounded by two cell layers.

용접결함의 형상인식을 위한 분류기 알고리즘의 성능 비교

김재열,김영석,김창현,양동조,이창선,송경석 한국비파괴검사학회 2003 학술대회 논문집 Vol.- No.1

In this study, we compared backpropagation network(BPNN) with probabilistic neural network(PNN) as the classification algorithm of welding flaws. For this purpose variables are appied the same to two algorithm. Here, feature variable is composed of time signal itself and frequency signal itself. Those are ultrasonic signals reflected on welding flaws. Through this process, we comfirmed advantages/disadvantages of two algorithms, identified application methods of two algorithms to classification methods of welding flaws. These advantages/disadvantages and application methods are based on theoretical backgrounds.

진공청소기 팬 모터의 진동 및 소음원인 분석을 위한 유동해석

김재열,곽이구,안재신,양동조,송경석,박기형 한국공작기계학회 2004 한국생산제조학회지 Vol.13 No.4

Recently technology resulted in highly efficient and multiple-functional electric appliances considering environmental problems. One of the environmental problems is noise of a product in respect to its function. A vacuum cleaner is an essential electric appliance in our daily lives. However, severe noise resulted from high motor speed for improving the function of the appliance is a nuisance for the user. This noise is caused by vibration from various parts of the appliance and fluid noise during a series of intake and exhaust processes while rotating the impeller connected to the axle at a high speed of the fan motor inside the vacuum cleaner rotating around 30,000-35,000rpm. Despite the fact that many researchers conducted studies on reducing the noise level of the fan motor in a vacuum cleaner, only few studies have been conducted considering both the theoretical and experimental aspects using fluid analysis by measuring vibration and noise. Moreover, there has not been a study that accurately compared major noise data obtained considering both of the aspects. In this study, both aspects were considered by considering the following experimental and theoretical methods to verify the major causes of noise from the fan motor in a vacuum cleaner.

糖尿病 集團檢診에 대한 費用效果分析

천병렬,박재용,감신,이경은 大韓産業醫學會 1995 대한직업환경의학회지 Vol.7 No.2

대구 지역의 일개 종합병원에서 실시한 1992년 건강 검진 결과 중, 20세 이상인 성인들을 연구 대상자로 하여 근로자 검진과 공무원 검진 자료에서 당뇨병 집단검진 항목 중 요당, 공복혈당 그리고 식후혈당 검사 결과와 공무원 검진 자료에서 성, 연령, 신장, 그리고 체중에 관한 자료를 수집하여 분석하였다. 당뇨병 집단검진의 효율성을 비용효과분석 기법으로 비교하기 위하여 기존의 근로자 검진 방법과 공무원 검진 방법, 기존의 근로자 검진 방법에서 2차 검사 항목 중 요당 검사를 제외한 대안 (A), 공복혈당검사만 직장에서 실시하는 대한 (B), 식후혈당검사만 직장에서 실시하는 대안 (C), 공복혈당검사를 직장에서 실시하고 음성자에게 식후 혈당검사를 직장에서 실시하는 대안 (D), 식후혈당검사를 직장에서 실시하고 음성자에게 공복혈당검사를 직장에서 실시하는 대안 (E), 그리고 요당검사만 직장에서 실시하는 대안 (F)에 대해 당뇨병 유소견자당 투입 비용을 산출하였다. 각 대안별 유소견자당 투입 비용은 기존 근로자 검진 방법이 37,767원, 기존 공무원 검진 방법이 50,441원, 대안 (A)는 37,433원, 대안 (B)가 27,645원, 그리고 공복혈당 음성일 때 식후혈당 양성인 비율을 2%로 고정한 경우의 대안 (C)가 28,541원, 대안 (D)가 38,458원, 그리고 대안 (E)는 38,488원이었다. 그런데 대안 (F)의 경우 양성예측도가 93%인 경우 유소견당 투입 비용이 18,689원으로 가장 적었지만, 양성예측도가 20%일 때는 88,106원으로 가장 많았다. 양성예측도가 64% 이상일 때 대안 (F)가 가장 비용효과적이었다. 결국 대안 (B)와 대안(F) 둘 중 하나가 가장 효율적인 검진 프로그램으로 생각되며 이는 요당 검사의 양성예측도에 의해 달라질 것이다. To evaluate the efficiency of the diabetes mellitus screening program, the records of screening examinations for general workers and official workers at a general hospital in Taegu city were analysed. Six alternatives of the diabetes mellitus screening program were compared in terms of cost-effectiveness. The screening program I which was already used in the examination for general workers, screening program II for official workers, alternative program (A) which was the same method as screening program I without urine sugar test for the second examination in a hospital, alternative program(B) with the test for fasting blood sugar(FBS) in a worksite, alternative program (C) with the test for postprandial blood sugar(PPBS) in a worksite, alternative program (D) with the first test for FBS and the second test for PPBS of negatives for FBS test in a worksite, alternative program (E) with the first test for PPBS and the second test for FBS of negatives for PPBS test, and alternative program (F) with the test for urine sugar in a worksite. To compare the cost-effectiveness between alternatives, the cost (Won) per positive detected for diabetes mellitus (cost-effectiveness ratio) was calculated. The cost per positive detected was 37,767 Won for screening program I, 50,441 for screening program II, 37,433 for alternative program (A), 27,645 for alternative program (B), and if it was assumed that the positive rate for negatives of FBS would be 2.0%, 28,541 for alternative program (C), 38,458 for alternative program (D), 38,488 for alternative program (E). However, that for alternative program (F) was varied with the positive predictive value(PPV) of urine sugar test for diabetes. The cost per positive detected was lowest(18,689 Won) when PPV when PPV was 93%, whereas, highest (88,106) when PPV was 20%. The critical value of PPV was 64%. The alternative program (F) was most efficient when PPV was 64% or more. Considering the prevalence for diabetes mellitus, PPV for urine sugar test, and feasibility of screening examination, alternative program (B) will be proved as the most efficient screening program. In conclusion, either program(B) or program(F) will be the most efficient method for screening a large population depending on the positive predictive value of fasting urine sugar test.