제주도 연안 갈치, Trichiurus lepturus 채낚기 어구의 생력화 : 3. 집어등의 수중조도

오승훈,서익조,김병엽,이창헌,정용진,서두옥,김동근 제주대학교 해양연구소 2001 해양자원연구소연구보고 Vol.25 No.-

만성적인 신체질환 및 장애를 지닌 아동의 심리적 특성:자기개념 및 스트레스에 대한 양상 비교

최승미,신민섭,정진엽,김중술 대한소아청소년정신의학회 2000 소아청소년정신의학 Vol.11 No.2

목적 : 만성 신체 질환 아동의 우울, 자기 개념 및 스트레스에 대한 지각과 대처 양상에 대해 알아보고자 하였다. 방법 : 연구 대상자는 서울대학교 병원 어린이 병원에 입원해 있거나 외래에 다니는 환아 13명과 정상아동 13명으로 구성되었다. 만성 질환 아동군은 Schiffer 등(1963)이 만성 환자군으로 정의한 조작적 정의에 근거하여 최소한 3개월 이상 질환을 앓고 있거나 앓았던 적이 있으며, 현재도 그 질환으로 인해 지속적인 치료를 받고 있는 정형외과, 소아과 아동을 대상으로 하였다. 정상 아동군은 그러한 병력이 없는 아동 13명을 대상으로 하였다. 검사도구는 피어스-해리스 자기 개념 척도, 소아 우울 척도, 투사적 검사(나의 기분을 색으로 표현하기, 다른 사람으로 인한 나의 기분을 색으로 표현하기, 비속의 아이)를 실시하였다. 결과 : 만성 질환 아동군과 정상 아동군을 비교한 결과, 만성 질환 아동군이 소아 우울 척도에서 유의미하게 높은 점수를 보였으며, 자기 개념 척도에서는 보다 유의미하게 낮은 점수를 보였다. 또한 자기 개념 척도의 하위 항목인 '인기도' 및 '학습 상태'에서 유의미하게 점수가 낮았다. 투사 과제의 경우, '색으로 표현하기' 과제에서는 집단간의 유의한 차이를 보이지 않았으나, 스트레스에 대한 지각 및 대처를 평가하는 '비속의 아이'과제에서는 하위 항목(비의 양, 기간, 도구, 효율성) 모두에서 집단간의 차이를 보였다. 비속의 아이 과제와 우울 점수, 자기 개념 점수와의 상관 계수를 구한 결과, '비가 오는 기간'항목이 우울 점수와는 정적 상관을, 자기 개념 점수와는 높은 부적 상관을 보였다. 결론 : 만성 질환 아동군이 정상 아동군 보다 더 우울하며, 자기 개념이 더 부정적이었다. 또한, 이들이 지각하는 스트레스는 상당히 지속적이고 장기적이며, 이에 대해 대처할 수 있는 스스로의 능력이나 전략을 사용하는 데 있어서는 매우 무기력한 것으로 나타났다. 이러한 결과는 만성적인 신체 질환이 아동의 정신 건강 및 심리적 적응에 있어서 위험 요인이 될 수 있음을 시사해 준다. 중심 단어 : 만성 질환 아동ㆍ심리적 특성ㆍ우울ㆍ자기 개념ㆍ스트레스 Objectivity : This study was conducted to examine the depression, self-concept, perception of stress & coping strategy in children with chronic physical illness. Methods : Two groups of participants were recruited for this study, 13 children with chronic illness in outpatient or impatient treatment at Seoul National University Children's Hospital, and 13 nonpatient children. They were assessed using Korean form of the Piers-Harris Self-Concept Scale(PHSCS), Kovacs' Children's Depression Inventory(CDI) and three subscaleds ('color how you feel', 'color how others make you feel', 'A children in the rain') of Children's Self-Report and Projective Inventory(CSRPI). Result : There were significant differences between the chronic ill children and the healthy children in scores of depression and self-concept. The chronicity ill children were more depressive and had very negative self-concept, and obtained significantly lower scores than the healthy children in the subscales of PHSCS, 'intellectual/school status' and 'popularity'. Among three scales of CSRPI, there was no difference in 'color how you feel' and 'color how others make you feel'. But there were significant differences in all items of 'A child in the rain' (quantity of raining, duration of raining, tool, and effectiveness). 'Duration of raining', correlated most negatively with PHSCS scores, and correlated positively with CDI scores. Conclusion : The children with chronic illness are more depressive and have very negative self-concept. And they fuel that the stresses are more permanent, but have no appropriate coping strategy. The results suggest that the chronic illness strongly affects the psychological and emotional adjustment of children(i.e. depression, peer relation, stress coping strategy). KEY WORDS : Children with Chronic illnessㆍPsychological characteristicsㆍSelf-conceptㆍStress.

제주도 연안 초망 어선의 소음에 관한 연구

박성욱,서익조,오승훈,김병엽,이창헌,서두옥 濟州大學校 海洋硏究所 2002 해양과환경연구소 연구논문집 Vol.26 No.-

제주도 연안에서 이루어지는 초망 어업에서 수중음을 이용하여 멸치 어군을 유효하게 집어하기 위한 기초 자료를 얻기 위하여 어선의 주기관을 공회전시켰을 때의 선상과 어군이 유집되어 투망되는 수심 4m지점과 함께 수심 10m층의 수중 소음을 측정 조사하였다. 이때 사용한 선박의 공회전은 전진시의 800 rpm과 후진시의 1000 rpm으로 그 결과는 다음과 같다. 1. 기관의 회전수 800 rpm에서 선수(B), 갑판(D), 선미(S), 연돌 위(F), 기관실 내(E)의 소음 준위는 각각 90, 93, 106, 107, 101 dB 이었으며, 기관 회전수 1,000 rpm에서의 소음 준위는 각각 93, 95, 110, 109, 103dB이었다. 2. 회전수를 800rpm으로 할 경우 100, 300, 500, 1000, 1500, 2000 Hz에서 선수의 소음 준위는 4m인 경우 각각 92, 95, 102, 97, 94, 92dB 이었으며, 수심 10m인 경우 87, 88, 99, 96, 94, 93 dB이었고, 선체 중앙에서는 4m인 경우 94, 91, 100, 96, 94, 92dB, 10m인 경우 93, 92, 99, 95, 93, 91dB이었다. 선미에서는 4m인 경우 98, 94, 100, 97, 94, 92 dB이었으며 10 m인 경우 92, 93, 99, 96, 93, 92 dB로 나타났다. 3. 후진시 사용하는 회전수 1000 rpm으로 할 경우 100, 300, 500, 1000, 1500, 2000 Hz에서 선수 소음 준위는 4m인 경우 각각 86, 91, 98, 95, 93, 92 dB로 나타났고, 10m인 경우 88, 87, 99, 96, 94, 92 dB로 나타났으며, 선미에서는 4m인 경우 88, 88, 99, 96, 93, 92 dB, 10m인 경우 88, 86, 99, 96, 94, 92 dB로 나타났다. In order to obtain a basic data for alluring a school of fish, anchovy with emitting underwater sound, an experimnet for measuring noise level was carried out on no-load operation of a engine. noise level was measured at the depths of four meters and ten meters and analyzed. Then, the revolution per minute of the ship used at this field experiment was 800 including 1000. The results were followed. 1. On 800 rpm, noise levels on board were 90, 93, 106, 107 and 101 dB in the order of bow, deck, stern, funnel, funnel and engine room. In addition, 93, 95, 110, 109 and 103 dB on 1000 rpm, respectively. 2. on 800 rpm, underwater noise levels of the depth of four meters at the bow were 92, 95, 102, 97, 94 and 92dB at the frequencies of 100, 300, 500, 1000, 1500 and 2000 Hz, respectively and those of the depth of ten meters were 87, 88, 99, 96, 94 and 93 dB. Underwater noise levels of the depth of four meters outside the engine room were 94, 91, 100, 96, 94 and 92 dB at the frequencies of 100, 300, 500, 1000, 1500 and 2000 Hz, respectively and those of the depth of ten meters were 93, 92, 99, 95, 93 and 91 dB. Underwater noise levels of the depth of four meters at the stern were 98, 94, 100, 97, 94 and 92 dB at the frequencies of 100, 300, 500, 1000, 1500, and 2000 Hz, respectively and those of the depth of ten meters were 92, 93, 99, 96, 93 and 92 dB. 3. On 1000 rpm, underwater noise levels of the depth of four meters at the bow were 86, 91, 98, 95, 93 and 92 dB at the frequencies of 100, 300, 500, 1000, 1500 and 2000 Hz, respectively and those of the depth of ten meters were 88, 87, 99, 96, 94 and 92 dB. Underwater noise levels of the depth of four meters at the stern were 88, 88, 99, 96, 93 and 92 dB at the frequencies of 100, 300, 500, 1000, 1500 and 2000 Hz, respectively and those of the depth of ten meters were 88, 86, 99, 96, 94 and 92 dB.

저주파음에 의한 자리돔, Chromis notatus의 청각 능력 : 청각 문턱치

이창헌,서익조,오승훈,김병엽,서두옥,김동근 제주대학교 해양과환경연구소 2001 해양과환경연구소 연구논문집 Vol.25 No.-

In order to obtain the fundamenal data about method of luring fish schools by underwater sound, this experiment was carried out to investigte the auditory threshold of coralfish Chromis notatus which was on the coast of Jeju island by heartbeat conditioning technique using pure tones coupled with a delayed electric shock. The coralfish could hear a sound in the frequency range from 80 ㎐ to 800 ㎐. The mean auditory thresholds of coralfish at the frequencies of 80 ㎐, 100 ㎐, 200 ㎐, 300 ㎐, 500 ㎐ and 800 ㎐ were 100 ㏈, 99 ㏈, 91 ㏈, 88 ㏈, 96 ㏈ and 114 ㏈, respectively. As the frequency became higher than 300 Hz the auditory threshold increased rapidly.

Variability of Chemical Stress Resistance in Food Isolated Bacillus cereus

Seung-Youb Baek,Se-Wook Oh,Minseon Koo,Hyun Jung Kim 한국식품영양과학회 2012 한국식품영양과학회 학술대회발표집 Vol.2012 No.10

In Situ Fracture Observation and Fracture Toughness Analysis of Pearlitic Graphite Cast Irons with Different Nodularity

Seung Youb Han,Seok Su Sohn,Sang Yong Shin,이성학,Yong Chan Suh 대한금속·재료학회 2013 METALS AND MATERIALS International Vol.19 No.4

Effects of microstructural modification and microfracture mechanisms on fracture toughness of pearlitic graphite cast irons with different nodularity were investigated by in situ observation of microfracture process. Six pearlitic graphite cast irons were fabricated by adding a small amount of Mg as a nodularizing element for graphite, and their microstructures including pearlite, ferrite, graphite, and eutectic carbide were analyzed. Most of ferrites were observed in a layer shape around graphites because of carbon-depleted zones formed near graphites. As the nodularity and nodule count increased, fracture toughness linearly increased in the cast irons except the iron containing many fine graphites. According to in situ observation of microfracture process, cracks initiated at nodular graphites and carbides even at a small load, and then propagated readily through the adjacent graphites or carbides, thereby resulting in the lowest fracture toughness. The cast iron having widely spaced graphites and ferrite layers thickly formed around graphites showed the highest fracture toughness because of the blocking of crack propagation by ductile ferrite layers and the crack blunting and deflection by graphites, which was also confirmed by the R-curve analysis.

Shear, Tensile and Shear/Tensile Combined Bond Strength of Metal Orthodontic Bracket Applied with Liquid Polish (Biscover)

Seung-Youb Lee(이승엽),Ji-Hye Song(송지혜),Youngji Choe(최영지),Myoung-Kyun Kim(김명균),Yu-Shin Kim(김유신),Young-Mi Jeon(전영미) 대한치과재료학회 2010 대한치과재료학회지 Vol.37 No.3

Change of Total viable count in baby leaf salads as a function of temperature

Seung-Youb Baek,Taeyoung Oh,Hyun Joo Chang,Jeong Hee Choi,Hyun Jung Kim 한국식품영양과학회 2013 한국식품영양과학회 학술대회발표집 Vol.2013 No.11

Contamination patterns and molecular typing of Bacillus cereus in red pepper powder processing

Seung-Youb Baek,Taeyoung Oh,Minseon Koo,Hyun Jung Kim 한국식품영양과학회 2011 한국식품영양과학회 학술대회발표집 Vol.2011 No.10

Life Cycle Cost Analysis based Optimal Maintenance and Rehabilitation for Underground Infrastructure Management

Seung-Hyun Chung,Tae-Hoon Hong,Seung-Woo Han,Jae-Ho Son,Sang-Youb Lee 대한토목학회 2006 KSCE journal of civil engineering Vol.10 No.4

This study presents a sanitary sewer management decision-making framework incorporating demand forecasting and life cycle cost analysis. The framework provides the asset managers with an alternative approach in sewer management. It is designed to allow asset managers to better allocate limited funds for maintenance and rehabilitation by identifying possible problematic sewers and devising a maintenance plan to prevent costly sewer failures. Sewer demand forecasting model is developed using an artificial neural network. The forecasted sewer demand is then used to identify "critical" areas, where the current hydraulic capacity is less than the forecasted sewer demand. In such areas, an optimal maintenance and rehabilitation strategy is developed through the application of probabilistic dynamic programming in conjunction with Markov chain deterioration modeling.