천장마감재를 겸한 슬래브 거푸집공법의 효용성 향상 방안

이형수,윤유상,서상욱,김창덕 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1

The purpose of this study is to present an improved the construction method of slab form combined with ceiling finish. The current integration construction method has some waste factors ; unnecessary process, rework, time & cost waste. Therefore the study applied the value stream analysis methodology for efficient improvement of current process. The main contents of the study are as follows ; 1) Waste factors of current process were analyzed through current state mapping(CSM). 2) An improved process was suggested through future state mapping(FSM). 3) Cost reduction effect by process improvement was also analyzed. The study recommends that development of technique to eliminate waste factors and application of the construction method of slab form combined with ceiling finish should be increased.

전도성 고분자 센서 어레이를 이용한 휘발성 유기 화합물 가스 인식

이경문,주병수,유준부,황하룡,이병수,이덕동,변형기,허증수 한국센서학회 2002 센서학회지 Vol.11 No.5

휘발성 유기 화합물 가스(Volatile Organic Compounds)를 인식하고 분석하기 위하여 전도성 고분자 센서어레이를 이용한 시스템을 제작하였다. Polypyrrole와 Polyaniline을 화학중합법으로 센서에 전도성고분자막을 형성하였고 이를 통해 VOC 검지용 센서 어레이를 제작하였다. 센서어레이로부터 측정되는 다차원 데이터는 주성분분석법(PCA)과 RBF(Radial Basis Function Network)을 이용하였다. 제안된 시스템으로 VOCs 가스를 인식하는데 있어서 RBF Network이 PCA방식보다 더욱 효율적인 것으로 판단되었다. We fabricated gas recognition system using conducting polymer sensor array for recognizing and analyzing VOCs(Volatile Organic Compounds) gases. The polypyrrole and polyaniline thin film sensors which were made by chemical polymerization were employed to detect VOCs. The multi-dimensional sensor signals obtained from the sensor array were analyzed using PCA(principal component analysis) technique and RBF(radial basis function) Network. Throughout the experimental trails, we confirmed that RBF Network is effective than PCA technique in identifying VOCs.

당밀의 첨가가 갈근탕박 사일리지의 품질과 산양의 기호성에 미치는 영향

김성복,문계봉,이봉덕,오홍록,배형철,이수기 충남대학교 농업과학연구소 2006 농업과학연구 Vol.33 No.1

Two experiments were conducted to investigate the effects of molasses supplementation to silage materials in ensiling Galgeuntang (herbal medicine) meal on the quality of silage, and its palatability in Korean native goats. In experiment Ⅰ, molasses was added at the levels of 0, 0.5, and 1.0% to Galgeuntang meal with three replicates per treatment. In experiment Ⅱ, three 1.5-yr-old Korean native goats were used to measure palatability. In experiment Ⅰ, lactic acid contents in molasses treatments were significantly(p<0.05) higher, and pH and butyric acid contents were lower than those of non-molasses treatment. In addition, molasses treatment increased total microbial cell counts in MRS medium for lactobacillus, but decreased total microbial cell counts in PDA medium for fungi. Molasses supplementation to silage materials increased in vitro dry matter disappearance. Molasses supplementation tended to increase silage intake in Korean native goat (experiment Ⅱ), but the difference was not significant(p>0.05). It is concluded that molasses supplementation to silage materials in ensiling herbal medicine meal could improve its preservability and palatability, the higher the better.

고령토로부터 알루미나 추출 잔분 활용에 관한 연구

이덕형,이용근,최세영 연세대학교 산업기술연구소 1992 논문집 Vol.24 No.2

Autoclaved hydrate of CaO-SiO₂-H₂O system was investigated according to CaO/SiO₂ mole ratio and the condition of hydrothermal treatment. Residual product for extraction of alumina from hydrochloric acid treated domestic kaolin and Ca(OH)₂ were used as the source of SiO₂ and CaO, respectively. The main crystalline phases were C-S-H(I), tobermorite, xonotlite and transformed in order of C-S-H(I) → tobermorite → xonotlite as hydrothermal temperature, time, CaO/SiO₂ mole ratio increase. The porosity and absorption were increased with increasing CaO/SiO₂mole ratio and hydrothermal treatment time. The bending strength was dependent on the balanced bond between the residual and hydrothermal products, and tended to be maximum at CaO/SiO₂ of 0.6, and hydrothermal temperature of 140℃.

SHS법에 의한 TiC-Al₂O₃계 세라믹스의 합성 및 소결특성

이형복,김성수,편무실,최덕배 明知大學校 産業技術硏究所 1991 産業技術硏究所論文集 Vol.10 No.-

TiC-Al₂O₃ system powders were prepared by the self-propagating high temperature synthesis method from the mixture of metal titanium, carbon and alumina powder, Powder and sintering characterization of TiC-Al₂O₃ system were investigated. TiC-15wt% Al₂O₃ compacts sintered by hoy-pressing under the pressure of 20MPa at 1850 for 90 minutes showed 3-point bending strength of 724Mpa, ?? of ??????, hardness of 2450㎏/㎟ and relative density of 97%. The combustion mode of combustion wave showed steady-state up to 15wt% Al₂O₃, spin above 20wt% Al₂O₃ also combustion velocity was decreased with increasing of Al₂O₃ contents.

時變磁界 測定用 센서에 관한 硏究

이복희,백용현,박형기,정승수,전덕규 경북대학교 센서기술연구소 1992 센서技術學術大會論文集 Vol.3 No.1

當歸의 種類에 따른 四物湯이 白鼠의 胸部大動脈 血管弛緩에 미치는 影響

김형환,이주호,이제현,안덕균,박성규 대한본초학회 2001 大韓本草學會誌 Vol.16 No.2

We have examined the relaxational reponse to the water extract of Angelica gigas Nakai (AG), A. sinensis(Oliv.) Diels (AS), A. acutiloba Kitagawa (AA), and Four-Substance Decoctions (AG-FSD, AS-FSD, AA-FSD) in isolated thoracic aorta from sprague dawley(SD) rat in the presence and absence of endothelium. Rat thoracic aorta was investigated in vessel segments suspended for isometric tension recording by polygraph. Responses to AG, AS, AA and AG-FSD, AS-FSD, AA-FSD were investigated in vessels precontracted with 5-hydroxytryptamine(5-HT) were compared in vasodilation effect. We found that the thoracic aorta segments responded to AG, AS, AA and AG-FSD, AS-FSD, AA-FSD with a dose-dependent vasodilation. The 5-hydroxytryptamine induced contraction at 10-4M were inhibited by 26.3%, 2.7%, 2.1% and 24.6%, 1.1%, 3.2% after addition of the 0.1 g/㎖ water extract of AG, AS, AA and AG-FSD, AS-FSD, AA-FSD. The 5-hydroxytrptamine induced contraction at 10^-4M with and without endothelium were inhibited by 24.6% and 6.9% after addition of the 0.1 g/㎖ water extract of AG-FSD. In conclusion, AG, AS, AA and AG-FSD, AS-FSD, AA-FSD-induced relaxation in the isolated rat thoracic aorta were composed of dose-dependent relaxation. AG-FSD has very potent vasodilation.

실과 체험 학습의 방향 탐색

김형균,이성덕 韓國實科敎育硏究學會 2001 實科敎育硏究 Vol.7 No.1

The purpose of this study was to review the direction of experience learning of practical arts education based on the theories of experiential learning. The major findings of this study were as follows; 1.As result of reviewing literature, the concept of experiential learning, experiential learning and its related education theory, four model of experiential learning were discussed. 2.Experiential Learning of Practical Arts Education should be conceived as a process, not in terms of outcomes. Experiential learning is described as a process whereby concepts are derived from and continuously modified by experience. 3.Experiential learning of Practical Arts Education should be a continuous process based in experience. experiential learning is a continuous process based in experience has important educational significance. 4.Experiential Learning of Practical Arts Education should be demanded the resolution of conflicts between dialectically opposed style of adaptation to the world. New knowledge, skill, or attitudes are achieved through confrontation among four modes(concrete experience, reflective observation, abstract conceptualization, active experimentation) of experimentation. 5.Experiential Learning of Practical Arts Education should be an holistic process of adaptation to the world. when experiential Learning is conceived as a holistic adaptive process, it provides conceptual bridges across life situations such as school and work, portraying learning as a continuous, life process. 6.Experiential Learning of Practical Arts Education should be involved dealings between the person and the environment. 7.Experiential Learning of Practical Arts Education should be the process of creating knowledge.

주침 수치 방법에 따른 種大黃이 백서의 흉부대동맥 혈관이완에 미치는 영향

김형환,이현경,강순아,안덕균,박성규 대한본초학회 2004 大韓本草學會誌 Vol.19 No.1

Objectives: We have examined the relaxative response to the water extract of Rheum undulatuum (ERU) and water extract of alcohol processed Rheum unddatum (ARU) with isolated thoracic aorta from sprague dawley (SD) rat Methods: Rat thoracic aorta was investigated in vessel segments suspended for isometric tension recording by polygraph. Responses to ERU and ARU were investigated in vessels precontracted with 5- hydroxytryptamine(5-HT). Results: We found that the thoracic aorta segments responded to ERU and ARU with a dose-dependent vasorelaxation. 1. The thoracic aorta segments responded to ERU and ARU with a dose-dependent vasodilation. 2. The amounts of emodin were 0.063% and 0.076% in ERU and ARU, respectable. 3. The 5-HT induced contraction at 10^(-4) were inhibited by 85.2±4.76% and 83.4*8.82% after addition of the 0.lmg/mL. water extract of ERU and ARU. 4. The 5-HT induced contraction at l0^(-3)% were inhibited by 100% after 10^(-3) emodin. Conclusion: In conclusion, vasodilation effect of the water extract of Rheum undulatum L. in rat thoracic aorta was not decreased according to the alcohol processing of Rheum undulatum L.

정신분열증 환자의 언어성 기억과제수행

전덕인,정기립,김찬형,이홍식 大韓神經精神醫學會 1998 신경정신의학 Vol.37 No.5

목 적 : 정신분열증 환자에서 기억장애가 일관되게 보고되고 있으나 반복에 의한 언어성 기억수행의 변화에 대해서는 아직도 알려진 바가 적다. 본 연구는 정신분열증 환자에서 전산화된 기억과제를 이용하여 반복시행에 따른 언어성 기억수행과 기억전략의 변화 및 학습과 망각의 양상을 정보처리적 관점에서 알아보기 위해 시행되었다. 방 법 : 항정신병약물을 7일 이상 복용하지 않은 정신분열증 환자 26명과 나이, 성, 교육정도를 맞춘 정상대조군 22명을 연구대상으로 하였다. 전산화 기억과제 중 우선 언어성 즉각 상기과제에서는 60개의 한글단어 모음에서 30개 단어가 선택되어 차례로 3초 동안 모니터에 제시된 다음, 피험자는 제시순서에 상관없이 기억나는 단어를 대답하였다. 이후 동일한 과제를 2회 반복하여 총 3회 수행하였다. 그리고 간섭과제로서 시각성 인식과제를 수행한 다음, 상기 과제를 구성하는 60개 단어모음을 하나씩 무작위로 노출시켜 앞서 보았던 단어인지 판단하는 언어성 인식과제를 수행하였다. 마지막 과제는 30분 지연 상기과제로서 언어성 즉각 상기과제에서 보았던 30개 단어를 다시 기억하여 답하도록 하였다. 항정신병약물을 7일 이상 복용하지 않은 정신분열증 환자 26명과 나이, 성, 교육정도를 맞춘 정상대조군 22명을 연구대상으로 하였다. 전산화 기억과제는 3회의 즉각 상기과제, 간섭과제, 인식과제, 그리고 30분 지연 상기과제의 순서로 시행되었다. 결 과 : 총 3회 반복된 즉각 상기과제에서 정신분열증 환자의 수행은 정상대조군보다 유의하게 떨어졌고 (df=1, F=12.4, p=0.001), 과제가 반복되면서 두 군 모두에서 유의한 수행증가가 나타났으나(df=2, F=148.0 p=0.0001) 증가되는 정도에는 차이가 있었다 (교호작용, df=2, F=11.4 . p=0.0001). 3차 상기수행과 30분 지연 상기수행의 차이(망각정도)는 정신분열증이 정상대조군보다 컸으나 유의하진 않았다. (df=33.9, t=-1.8, p=0.08), 3회의 상기수행에서는 전혀 기억하지 못했으나 지연상기에서는 기억한 단어, 즉 늦은 상기의 양은 정신분열증 환자에서 유의하게 적었다(df=46, t=3.0, p=0.005), 전체적으로 군집화 정도와 즉각상기 수행 사이에 유의한 정적 상관관계가 있었으며, 환자군의 군집화는 상기과제에서 전체적으로 정상대조군보다 감소되어 있었다(df=1, F=6.53, p=0.01), 비록 과제가 반복되면서 정상대조군과 환자군 모두 군집화가 증가되었으나(df=2, F=36.7, p=0.0001) 두 군 사이의 군집화 차이는 점점 커졌다(교호작용, df=2, F=3.72, p=0.03). 결 론 : 상기 결과에 의하면 정신분열증 환자에서는 반복에 의해 새로 학습할 수 있는 언어성 기억기능은 저하 되어 있으나 일단 학습된 기억은 유지할 수 있는 가능성이 시사되며, 이러한 학습저하에는 기억전략의 비효율성이 밀접하게 관련되어 있다고 사료된다. 정보처리적 관점에서 정신분열증의 정교한 부호화 과정의 결함을 지지하는 소견이다. Objectives : Memory deficits in patients with schizophrenia have been well established, but it is still unclear how memory performance changes during verbal learning tasks. This study was designed to assess the pattern of verbal learning and memory performance to test the inefficiency of encoding processes in learning of schizophrenia. Method : Subjects consisted of 26 patients with schizophrenia who were unmedicated for at least seven days and 22 normal controls who were matched for age, sex, and education. Verbal memory and learning were evaluated with computerized tasks composed of three consecutive immediate recall trials, a yes/no recognition test, and a delayed recall trial of a word list. Results : The patients with schizophrenia showed significant learning deficits characterized by impaired immediate recall performance and poor learning of a word list. However, both verbal recognition performance and forgetting were comparable in both groups. Word clustering correlated significantly with recall performance. Clustering of patients decreased significantly over immediate and delayed recall tasks and showed poor increase during consecutive recall tasks. Conclusion : These findings indicate that verbal learning and mnemonic strategy are impaired but learned information appears to be preserved in patients with schizophrenia The results are consistent with the notion that a learning deficit is closely related with impaired encoding processes in schizophrenia.