콘크리트용 잔골재로서 고막 패각의 활용성에 관한 연구

신용석,이설,김판선,조철희,김정섭 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1(구조계)

1) As a result of compressive strength experiment, rupture compressive strength showed more increases in specimens of 15% and 20% of Cockle shells in those of non-mixture. Comparing compressive strength between no-mixed Specimens and Specimens of containing Cockle shells, Specimens containing Cockle shells showed higher strength in 60 days of age, and as ark Cockle is contained and age is elapsed, compressive strength is also increased. 2) To sum up the above experimental results, it is found that using splitted Cockle shells as aggregate for concrete by 10% - 20% showed the same or higher compressive strength and shear strength as concretes using general aggregate and it can be used as substitute aggregate of concrete. It is considered that for future use of splitted Cockle shells as substitute concrete aggregate, continuous researches of its durability, applicability and economy are needed.

아동기 경계선 장애 : 8 CASES 8증례

신민섭,이정섭,홍강의 대한소아·청소년정신의학회 1995 소아청소년정신의학 Vol.6 No.1

요 약 아동에서의 경계선 장애는 현실감각의 불안정, 대인관계의 장애, 충동조절의 장애, 심 한 기능의 변동, 발달상의 불균형, 불안등을 보이며 현재의 진단 체계로는 진단하기 어려운 환아를 의미한다. 본 논문에서는 Bemporad등과 Vera등이 제안한 '경계선 아동'에 부 합하는 7세에서 11 세사이의 8명의 소아정신과를 내원한 아동들을 대상으로 37개의 병인들을 비교하여 다음 과 같은 결과를 얻었다. 1) 임상적인 특징으로는 모든 환아들이 다 남아였으며, 현재의 진단체계에서는 진단을 내리기가 어려웠고, 공존정신과적인 진단이 많았다. 주소는 산만하고 또래와 어울리지 못한다는 것 이 많았다. 현실과 환상사이의 경계가 불명확한 것과 사고의 장애가 특징적인 증상이었다. 2) 심리학적 및 신경생리학 검사상 지능은 보통수준이었으며, 동작성 지능이 언어성 지능보다 우수한 경향이 있었다. 투사법 검사에서는 사고 장애의 지표를 보였으며, 정서적으로 불안 정하고 공격성이 심하였다. 반수에서 주의력 검사상 주의력결핍을 시사하였다. 기질적인 요인은 뚜렷하지 않았다. 3) 발달력 및 가족력상 원하지 않았던 아이가 많았고, 주 양육자는 어머니였으나, 양육 방식에 중등도의 문제가 있었다. 부모간에 불화가 많았고, 사회 경제적으로는 중하가 많았다. 언 어발달은 대부분에서 지연이 되었거나, 성장하면서 점차로 정상이 되었다. 공격적이어서 또래들로 부터 따 돌림을 많이 받았다. 4) 치료 및 경과상 6세경에 처음 병원에 방문하였으며,평균 치료 기간은 2년이었고,주 로 외래에서 치료를 받았다. 약물치료에 대한 반응은 뚜렷하지 않았으며, 장기 놀이치료의 필요성이 암 시되었 다. 본 연구 방법에 여러가지 제한점이 있으나, 앞으로 이 장애의 명확한 진단 기준을 확 립하고 역학 및 치료에 대한 연구들이 이루어져야 할 것이다. ABSTRACT The so-called borderline children are characterised by disturbances in the sense of reality and interpersonal relationships, lack of control, fluctuation of functioning, uneven development and excessive anxiety. But the concept of borderline disorder of childhood is very difficult to define and diagnose in current classification system. The present study adapted the consensus symptoms in borderline children by Bemporad and Vera. Eight cases aged 7-11 were examined in 37 variables. Results are as follows. 1) All subjects are boys and can hardly be diagnosed in current diagnostic system and have many concurrent diagnoses. Common chief complaints are hyperactivity and poor peer relation. The most prominent clinical feature is disturbances in the sense of reality. 2) In KEDI-WISC test, the borderline children showed average intelligence, but performance IQ tends to be higher than verbal IQ. In Rorschach test. they showed high thought disorder index, emotional instabilities and aggressive impulses. The results of TOVA suggested attentional deficit in half of the subjects. The organicity is not prominent. 3) Many of the borderline children were unwanted baby. Although primary care takers of all the subjects were their mothers, there were moderate problems in caring attitude of their children and marital relationship with their husbands. Socioeconomic status was generally below middle class. Most of all subjects have delayed language development, but have overcome subsequently. Many subjects were rejected by peers because of their aggression. 4) The first visit of the subjects was about 6 years of age. Average duration of treatment was 2 years. All of them were treated in the outpatient basis except one. The effect of pharmaco- therapy was doubtful and the necessity of long term play therapy was suggested. Although there were many limitations of method in present study, it was suggested that further research is needed for diagnostic criteria, epidemiology and treatment.

先加力 후 補修-補强한 鐵筋콘크리트 壓縮部材의 構造特性에 관한 實驗的 硏究

신용석,최진석,김판선,조철희,손순채,김정섭 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2(구조계)

This study examined the Stress and structural characteristics of reinforced concrete compressive member repair and strengthening by CFS and GFS after pre-loading. The following results were obtained. The results of compressive testing by the kind of fiber suggested that: In CFS, Specimen increased by about 26.9% and strengthening after pre-loading, by about 111.8%, compared with after strengthening, In GFS, Specimen increased by about 69.0% and repaired and models after pre-loading, by about 76.7%, compared with after strengthening. In the compressive testing, strengthen with CFS-Specimen showed a brittle fracture and strengthen with GFS-Specimen represented ductile fracture. More increasing in stress of Specimen, and repair and Strengthening specimen after pre-loading than loading specimen after strengthening suggested the strengthen effect of fiber.

초음파속도법을 이용한 혼화재 및 섬유 사용 콘크리트의 압축강도 추정에 관한 연구

김정섭,신용석,노성열 朝鮮大學校 建設技術硏究所 2007 建設技術硏究 Vol.27 No.1

This study aims to estimate strength approximate to actual concrete strength by presenting appropriate non-destructive strength estimation expression with admixtures such as fly ash, blast furnace slag and silica fume which are used as cement substitute and polypropylene fiber and steel fiber and owing to their s of cement owing to their equal conditions to blending characteristics of concrete used for domestic structures and their recyclable properties. In case of ultrasound velocity, equation by Japanese Architecture Society was estimated 4%~11% higher than destructive strength till 60 days of age, but as age progresses, i is estimated to 15% lower than destructive strength and remaining suggested equation was estimated 3%~27% lower than destructive strength in almost age. As a result of comparing error rates between conventional suggested equations and this estimation equations, there are a little differences by age, but error rate of this study was reduced to 0.6%~18.6% by ultrasound velocity method and it is judged that it is desirable to be used for concrete using admixture and fiber

비파괴 시험에 의한 혼화재를 사용한 콘크리트 압축 강도 추정에 관한 연구

김정섭,신용석 朝鮮大學校 建設技術硏究所 2005 建設技術硏究 Vol.25 No.1

This study made member specimen for taking specimen, core with the concrete mixing normal concrete, admixture and conducted the same air curing as field conditions. After performing destructive and nondestructive test by ages, estimate expression was suggested by analyzing correlations between compressive strength, rebound number and ultrasonic pulse velocity and the results are as follows. 1) As a result of comparing error rate of existing expressions and this estimation expression, error rate of this estimation is reduced compared to existing expressions and has higher reliability. 2) When conventional concrete expression is applied to admixture concrete, error rate occurs and then this study suggests the following estimation expressions depending on types of admixture concrete.

순환골재를 사용한 콘크리트 보의 구조적 특성에 관한 연구

김정섭,신용석,노성열 朝鮮大學校 建設技術硏究所 2007 建設技術硏究 Vol.27 No.1

This study identified materials and dynamic characteristics of reclaimed aggregates affecting reinforced concrete through materials and supplementary tests to use broken red bricks and waste concrete as substitutes of concrete and obtained the following results. As a result of the bending specimen test according to types of reclaimed aggregates, it was found that when normal concrete was compared with reclaimed concrete. RBA 30% specimen showed 99-104% of yield load and RCA 30% specimen showed 102-104% of yield load, which were the yield load and the largest yield load of normal concrete. Therefore, it is believed that RBA 30% and RCA 30% specimens has almost similar bending strength to ormal concrete. To sum up the results of material and supplementary tests, the mixed aggregates showed almost the same compressive strength and bending strength compared to that of normal concrete when 30% of broken red bricks and waste concrete were mixed. So this study suggests that they can be applied as thick aggregates.

반발경도법에 의한 혼화재 및 섬유사용 콘크리트의 압축강도 추정

김정섭,신용석,노성열,김정훈 朝鮮大學校 建設技術硏究所 2007 建設技術硏究 Vol.27 No.2

This study aims to estimate strength approximate to actual concrete strength by presenting appropriate rebound method strength estimation expression with admixtures (fly ash, blast furnace slag, silica fume) which are used as cement substitute and polypropylene fiber and steel fiber and owing to their s of cement owing to their equal conditions to blending characteristics of concrete used for domestic structures and their recyclable properties. In case of rebound hammering, equation by Japanese Architecture Society was estimated 26~40% higher than destructive strength and remaining suggested equation was estimated 2%~18% lower. In case of ultrasound velocity, equation by Japanese Architecture Society was estimated 4%~11% higher than destructive strength till 60 days of age, but as age progresses, is estimated to 15% lower than destructive strength and remaining suggested equation was estimated 3%~27% lower than destructive strength in almost age. In case of complex methods, all suggested equations were estimated to 24%~94% higher than destructive strength. Since application of existing expression of normal concrete against concrete using admixtures and fiber causes error rate, this study suggests the following estimation expression depending on the kind of admixtures and fiber of concrete using them and position of non-destructive experiment. C-N f_(cu)=1.6R-25.43(R²=0.90), C-FA f_(cu) = 1.07R-8.76 (R²=0.82), C-BF f_(cu)=1.46R-23.09(R²=0.92) C-SF f_(cu) = 1.55R-22.96(R²=0.89), C-PP f_(cu) = 1.16R-12.24(R²=0.73), C-S f_(cu)=0.99R-8.07(R²=0.86)

구조적 손상을 입은 철근콘크리트 보의 보강 효과에 관한 연구

김정섭,신용석,김경옥 朝鮮大學校 建設技術硏究所 2006 建設技術硏究 Vol.26 No.1

This study conducted bending experiment to examine reinforcing effects after preloading of reinforced concrete by reinforcing materials and obtained the following conclusions. To sum up experimental results, it was found that CFS reinforced specimens were excellent in improving bending force and ductility capacity and CB reinforced specimen showed higher reinforcing effects. GFS reinforced specimen had lower reinforcing effects due to lower attachment than fiber reinforced material CFS. GSP reinforced specimen had larger internal force than other reinforced specimens, but it showed the lowest reinforce effects due to its low attachment to concrete and GSP reinforcing specimen showed the same or higher reinforcing effects than other reinforcing materials if its attachment to concrete is improved.

한국판 아동용 Leyton 강박증 척도의 개발

홍강의,신민섭,이정섭 대한소아ㆍ청소년정신의학회 1994 소아청소년정신의학 Vol.5 No.1

요 약 소아의 강박증 평가 도구인 아동용 레이톤 강박증 척도를 한국판 집단용 지필 검사로 개발하기 위하여 본 연구를 시행하였다. 국민학교 4학년부터 고등하교 3학년까지 127 명을 대상으로 한국어로 번역한 지필 검사 양식의 아동용 레이톤 강박증 척도를 실시하였고, 검사- 재검사 신뢰도 검증을 위하여 3주뒤에 82명에게 재검사를 시행하였다. 또한 전 대상 군에 신뢰도와 타당도가 이미 입증된 간이진단검사(SCL90-R)를 함께 실시하여 공존타당도가 있는 지를 알아 보았 고, 강박환아군과 정신과 환아대조군 그리고 정상대조군을 9명씩 비교하여 진단 변별력이 있는 지를 보 았다. 검사-재검사 신뢰도, 내적 일관성 등은 상당히 만족스러운 수준이었고, 간이진단검사와의 공존 타당도도 비교적 높게 나왔다. 강박환아군이 정신과 환아대조군이나 정상 대조군보다 유의하게 높은 점수가 나와서 변별력 또한 높은 것으로 나타났다. 요인분석상 문항들을 5개의 요인 으로 묶을 수 있었다. 한편 증상과 저항척도에서 여아가 남아보다 유의하게 높은 점수를 보고하였 으며, 특히 국민학교 여아에서 높은 점수를 보여 주었다. 결론적으로 한국판 아동용 레이톤 강박척도는 실시하기 간편하고, 신뢰도와 타당도가 좋은 척 도임 이 입증되 었다. 향후 전국 규모의 규준을 작성하고, 미흡한 부분을 보완한 후속 연구가 필요하다. ABSTRACT Objects : This study was carried out to develop the Korean form of Leyton Obsessional Inventory-Child Version(LOI-CV) designed to assess the obsessive compulsive symptoms in children and adolescents. The LOI-CV was modified into a paper-and-pencil form in order to administer it to group. Methods : We applied the Korean form LOI-CV to 127 elementary, middle and high school children, and retest it to 82 children with 3 weeks interval. Togather with LOI-CV, Korean form of SCL-90-R which had been proved its reliability and validity, were administered to the all subjects for examininig of concurrent validity And then we examined whether this scale discriminates between obsessive patients, psychiatric controls and normal controls in the level of obsessive symptoms. Results : Test-retest reliability, internal consistency were very satisfactory. Concurrent validity with SCL-90-R was moderate level. And obsessive patients was scored significantly higher than psychiatric and normal controls in the level of obsessive symptoms. In factor analysis, items are clustered to 5 factors. In the global obsessive symptom, obsessive scores of female elimentary school students were higher than that of male students. Conclusions : These results indicate that the Korean form of LOI-CV is a reliable and valid self-rating scale to assess the obsessive-compulsive symptoms in Korean children and adolesce- nts. Author suggests that future research is needed for Korean version standardization study in normal and clinic-refered population.

鹽化物 含有梁에 따른 鐵分 腐蝕에 관한 實驗的 硏究

최진석,조철희,신용석,고송균,손순채,김정섭 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1(구조계)

As a result of separating river sand and sea sand into the corrosion increased according to the of thinnss or the coating and the Chloride Content and Corrosion of Steel Bar through the experiment, the following conclusions are obtained. 1. There was no corrosion in the case of treating the steel bar with anticorrosive among test specimens cured in the air for 60 days, corrosion was found in the test specimens not treated with anticorrosive and for 60 days of age. 2. The area of corrosion increased according to the thinnss of the coating and the chloride content wher exposed for are more than 60 days. Therefore, it was determined in general that the corrosion progressed more rapidly in water cured specimens than in air cured ones and this was due to the influence of C1_(￣) in the sea sand.