건축공사시방서에서의 KS규격의 국제인증방안에 관한 연구

김경식,이재섭,김용수,이규진,조용훈,최완철,전재열,이현수,구재동,이기환 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1

The purpose of this research is make out construction specifications for International Construction. Using off-shore products incur cost increase and longer delivery term of construction. and inconvenient on International Construction. Expand the range of additional local products conforming to performance. Life Cycle Cost. maintainability. operability. user's acceptability, etc.. And this study is suggest the standard formats and the techniques for construction specification.

폐폴리우레탄 폼을 이용한 유출유 흡수

이현구,김형순 한국공업화학회 2003 응용화학 Vol.7 No.1

This study investigate the effectiveness of rigid and flexible waste polyurethane foams for oil spills clean up. For the two types of the waste foams used as a sorbent, rigid sandwich panel foam and high density auto seat foam were selected, respectively. The sorption test of the above foams were performed in different types of petroleum products, and in the presence and absence of water as well. Finally, the same experiments were carried out in simulated seawater bath in order to estimate that actual sorption properties in the sea. In the case of rigid polyurethane foam, the sorption properties that the sorbent materials had, were poorer as compared with the flexible foam except floating ability, which showed good sorption properties not only in floating ability, but also in initial sorption rate and maximum sorption capacity.

만성 세뇨관 간질성 신염을 보인 메칠말로닌산혈증 1예

이진석,구영희,하태선 대한신장학회 2003 대한신장학회잡지 Vol.22 No.6

將軍鑛山 부근에 分布하는 將軍炭酸藍岩의 熱水變質作用

李鉉具 충남대학교 1985 忠南科學硏究誌 Vol.12 No.1

The Janggun mine is situated approximately at latitude 36°51′N, longitude 129°04′E. The ore deposits of Janggun mine may be classified into manganese deposits and lead-zinc-silver deposits. The manganes deposits may be subdivided into manganese corbonate and mangcnes oxide deposits on the basis of their mineralogy and genesis. The manganese carbonate and the lead-zinc-silver deposits are of hydrothermal - metasomatic origin, charaeterized by marked hydrothermal alteration of the wall rocks, such as hydrothermal manganese enrichment of carbonate rocks, silicification, chloritization, sericitization and argillic alteration. The Janggun Limestone Formation, in which the ores have been deposited, varies thickness from 100∼800m, and consists mainly of gray∼white massive limestone, vermiculas limestone, dolomitic limestone and dolomite rock with some intercalations of siliceous and muddy carbonate rocks. These carbonate rocks have been thoroughly recrystallized and contain metamorphic minerals, such as phlogopite, biotite, manganes calcite, etc. The Janggun carbonates near the lead-zinc-silver orebodies show some evidence of influence by mineralization. Polarizing microscopic studies, X-ray diffraction analysis, stainning methods by arizarin red S and AgNO_3-K_2CrO_4, and chemical analyses by EPMA were made on the carbonate minerels. The results obtained are summerized as follows. 1. On the basis of the petrological study, wall rock alteration zone of this mine may be divided into the following four zones from orebody to wall rock. 1) Rhodochrosite zone. 2) Dolomite zone. 3) Dolomitic limestone zone. 4) Primary calcite and dolomite zone. 2. By means of electron probe microanalysis, it was found that manganoan, dolomite occured between primary dolomite grains, cross the cleavage of the primary dolomite, and around the dolomite grains. 1) There was not recognized Mn and Fe elements in the primary calcite and dolomite zone. 2) In the dolomitic limestone zone, calcite and dolomite were subjected to weak hydrothermal manganese enrichment and the grade of the manganese enrichment increases oreward. 3) Rhodochrosite zone consisted of rhodochrosite, manganoan calcite and magnecian calcite. 3. This study supports that the Janggun manganese carbonate deposits are of hydrothermal metasomatic origin.

퇴행성 골관절염에 있어서 Diacerhein(Artrodar^(�)) 제제의 효과에 대한 임상적 연구 : Prioxicam 제제 투여군과의 비교연구

이준규,신현대,이정구 최신의학사 1990 最新醫學 Vol.33 No.2

LaNiO₃의 전자 구조

具賢珠,李廣純 가톨릭대학교 자연과학연구소 1995 자연과학논문집 Vol.16 No.-

Perovskite형 복합 산화물인 LaNiO₃ 단위세포를 (2×2×1)으로 확장시킨 구조에서 각 구성원자 궤도함수 DOS를 Extended Hu¨ckel type tight binding 방법으로 계산한 결과, LaNiO₃의 Fermi 준위 근처에서의 전자 이동은 니켈 3d 전자에 의해 이루어지는 것으로 생각된다. The valence orbital density of state for each atom in extended (2×2×1) model of LaNiO₃with perovskite structure calculated by Extended Hu¨ckel type tight binding method. As the result of calculation it is supposed that the electron transfer around the fermi level due to 3d electron of nickel atom.

영구 계승치의 조기 맹출에 관한 증례 보고

구현정,한세현,이재천 大韓小兒齒科學會 1999 大韓小兒齒科學會誌 Vol.26 No.2

유치의 탈락과 영구치의 맹출은 정상적이고 예측 가능한 생리적인 과정이다. 치아 발육의 정확한 예측은 어린이의 치료 계획의 수립에 있어서 중요하다. 어린이의 연령과 그에 해당하는 치아 발육의 정상치가 여러 연구자들에 의해 조사되었다. 그러나 다양한 요소에 의해 치아의 정상 발육이 영향받을 수 있고, 치아의 맹출을 촉진하거나 지연시킬 수 있다. 특히 농양이 있던 유치의 조기 발거나 탈락은 영구 계승치의 맹출에 뚜렷한 영향을 미칠 수 있다. 유치의 농양은 영구치를 덮은 골을 흡수시키고 따라서 발육 상태에 관계없이 영구치는 맹출할 수 있다. 유구치가 일찍 탈락 또는 발거되고 영구 계승치의 맹출이 조기에 일어나면 치아의 편향과 회전, 맹출 순서의 변경, 이웃 치아의 매복, 중심선 변위 등의 다양한 중요한 사건이 발생할 수 있다. 이에 저자는 서울대학교 병원 소아치과에 내원한 환아들의 조기 맹출한 영구 계승치의 임상적, 방사선학적 특징과 그로 인한 영향을 알아보고, 그에 따른 적합한 처치와 추후 관찰 사항을 보고하고자 한다. Exfoliation of the primary teeth and eruption of the permanent teeth is a normal and predictable physiologic process. The accurate prediction of tooth development is of major importance in treatment planning for children. Norms that correspond to the child's age and development have been determined by many investigators. However, there are a variety of factors that may hasten, retard, or otherwise affect the normal developmental process. Among the factors that influence tooth eruption is the premature loss of primary teeth. An abscess of a primary molar, followed by bone resorption and early extraction or exfoliation may lead to premature eruprion of the permanent succesor, and a variety of clinical sequelae. I, hereby present the patients who have prematurely erupted permanent successor in Seoul National University Hospotal Pediatric Dentisty, and report the clinical and radiologic characteristics, its sequelae, proper managements, and followed up findings.

수치사진측량에서 수치영상의 최적해상도에 관한 연구

이현직,구대성 尙志大學校 生産技術硏究所 2000 生産技術論叢 Vol.8 No.-

Recently, the digital map of national basemap has been made as a national task in Korea. The digital map would have to be corrected and/or updated to cope with the changes in topography in future. For that, an efficient correction and/or updating method correspond with digital map should be presented. Digital photogrammetry has been considered as an efficient method for digital mapping. This study aims present an optimum resolution of digital image in digital photogrammetry for digital mapping. Digital images of a pair of aerial stereo photographies are acquired in various resolution. Then, the images are applied in each orientation process in digital photogrammetic system. As a result of the experiment, optimum resolution can be presented.

투기운동이 골밀도에 미치는 효과

이재구,조현철 龍仁大學校 武道硏究所 1998 武道硏究所誌 Vol.9 No.1

The purpose of this study was to examine the effects of fighting exercise on bone mineral density of lumbar spine, proximal femur, and forearn. Sixteen exercise females, TKD group 8 and JD group 8, and nine female of neneexercise group were D group and JD group recruited from university taekwondo and judo teams were career players, Bone mineral density were measured at three local bone sites; radius and ular of right forearm, lumbar spine 2-4 was significantly higher (16.7%, P<.0231) in the JD than NG. Both neck (P<.013) and trochanter (P<.0044) sites were significantly different between three groups. JD were 20.1% and 32.6% higher than ND, respectively. On the total ulna distal, total 33% site and radius 33%, JD were significantly 18.7%, 27.4% and 15.2% higher, and also TKD were significantly 3.8%, 17.5% and 14.4% higher than those of NG, respectively. In conclusion, Judo players in this study were sown higher bone mineral density in the all sites measured than normal group (P<.05) or taedwondo player (relatively). It may probably be contriuted that judo players had greater impacts in whole body through a falling skill training and pushing or pulling techniques of judo. Moreover, bone mineral densities to the appendicular bones, radius and ulna, were significantly higher in the two exercise groups than normal group means complete effect on the long term training of fight exercise.

예방적 레진수복의 미세누출에 관한 연구

구현정,이상훈,한세현 대한소아치과학회 2001 大韓小兒齒科學會誌 Vol.28 No.3

예방적 레진수복은 교합면 열구전색의 개념을 확대하여 초기우식에만 국한한 와동을 형성하여 복합레진으로 충전한 후 나머지 건전한 부위의 소와열구를 치면열구전색재로 도포하는 것이다. 충전제가 첨가된 치면열구전색재로서 작은 와동의 수복도 가능하다는 새로운 방법은 소아환자의 치료시 술자와 환자 모두에게 도움을 줄 수 있을 것이다 그러나 예방적 레진수복을 시행하여 비교한 연구가 아직까지는 부족한 실정이다. 이에 저자들은 4가지 방법의 예방적 레진수복시의 미세누출을 비교해보고자 하였으며 레진수복만을 한 경우도 함께 비교하여 보았다. 55개의 상, 하악 소구치를 준비하여 I급와동을 교합면에 형성하고 다음과 같이 수복하였다. 제 1군 . 와동을 복합레진(Z-100)으로 수복 제2군 : 와동을 복합레진(Z-100)으로 수복 중합후. 비충전 전색재인 Teethmate F-1으로 소와열구도포 제3군 : 와동을 복합레진(Z-100)으로 수복 중합후, 충전 전색재인 Ultraseal XT-plus로 소와열구도포 제4군 : 와동과 소와열구를 한 번에 Ultraseal XT-plus로 수복 제5군 : 와동과 소와열구를 나누어 Ultraseal XT-plus로 수복 위와 같이 처리한 치아를 5℃와 55℃의 수조에 번갈아 30초씩 500회의 열순환을 실시하고 1% methylene blue용액에 24시간 담근 후 수세하고 투명레진에 매몰하였다. 매몰된 치아를 협설측으로 치아장축방향으로 평행하게 절단한 후 입체현미경으로 염색용액의 침투정도를 관찰하여 다음의 결과를 얻었다. 1. 평균 미세누출은 4군에서 가장 높았고, 3군에서 가장 낮았다. 평균 미세누출은 4>1>5>2>3군의 순으로 감소하였다. 2. 군간의 미세누출 비교에서 1군은 5군과는 통계학적으로 유의한 차이가 없었으나, 2군 3군보다 유의하게 높은 미세누출을 보였고(p<0.05), 4군보다는 유의하게 낮은 미세누출을 보였다(p<0.05). 3. 2군은 3군과는 통계학적으로 유의한 차이가 없었으나 4군. 5군보다는 유의하게 낮은 미세누출을 보였다(p<0.05). 4. 3군은 4.5군보다 통계학적으로 유의하게 낮은 미세누출을 보였다(p<0.05). 5. 5군은 4군보다 통계학적으로 유의하게 낮은 미세누출을 보였다(p<0.05). of as follows. Cavity preparation is limited to areas of initial caries. The cavity is then restored with composite resin, while other sound pits and fissures are sealed with pit and fissure sealant. If pit and fissure sealant with which microrestoration is possible is used, it may be of great benefit to both pa-tient and operactor in case of difficult-to-control children's treatment. However, study on preventive resin restoration using this kind of materials have been scarce. Preventive resin restoration, extended concept of occlusal pit and fissure sealing, is procedure composed The purpose of this study was to compare the microleakage of four different modes of preventive resin restoration . Restoration using only composite resin was compared together. Fifty-five bicuspids were prepared with small class I cavity preparation on the occlusal surface, divided into the following groups and restored accordingly. Group 1 : Cavity was restored with Z-100 composite resin. Group 2 : Cavity was restored with Z-100 composite resin. Pits and fissures were then sealed with Teethmate F-1. Group 3 : Cavity was restored with Z-100 composite resin. Pits and fissures were then sealed with Ultraseal XT-plus. Group 4 : Cavity and pits and fissures were restored with Ultraseal XT-plus altogether. Group 5 : Cavity was restored with Ultraseal XT-plus . Pits and fissures were then sealed with the same material . After restoration. the samples were thermocycled 500 times between 5℃ and 55℃ with a dwell time of 30 seconds. After thermocycling, the samples were dipped into 1% methylene blue solution for 24 hours, then rinsed with tap water. The teeth were then embedded in resin and cut buccolingually along the tooth axis and observed with a stereomicroscope to determine the degree of microleakage The results were as follows : 1 Group 4 showed the greatest microleakage, while group 3, showed the least. The mean microleakage decreased in the following order: 4>1>5>2>3. 2. There was no statistically significant difference between group 1 and group 5(p>0.05). However. group 1 showed significantly greater microleakage compared to group 2 and 3(p<0.05). Group 1 showed significantly less microleakage compared to group 4(p<0.05). 3. Group 2 showed no statistically significant difference compared to group 3(p>0.05). However, group 2 showed significantly less microleakage compared to group 4 and 5(p<0.05). 4. Group 3 showed significantly less microleakage compared to group 4 and 5(p<0.05) . 5.Group 5 showed significantly less microleakage than group 4(p<0.05).