고속프레스의 다이나믹 시스템 및 방진시스템 설계에 관한 연구

서진성(Jin Sung Suh),정철재(Chel-Jea Jeong),현기용(Gi-Yong Hyeon),류민(Min Ryoo) 한국소음진동공학회 2015 한국소음진동공학회 논문집 Vol.25 No.12

분산된 환경에서의 상태 전이 그래프의 확장

서진형(Jin-Hyung Suh),이왕헌(Wang-Heon Lee) 한국컴퓨터정보학회 2010 韓國컴퓨터情報學會論文誌 Vol.15 No.1

일반적인 웹 환경에서도 웹 페이지에 포함되어 있는 웹뷰 콘텐츠의 갱신 상태와 재-계산 상태 또는 생성되는 과정에서의 변화는 파악하기가 어려우며, 만약 갱신이 되고 있는 도중에 읽기 작업이 수행되거나, 잘못된 갱신으로 인한 부정확한 콘텐츠의 사용으로 인한 문제가 발생하면 이에 대한 문제 해결은 매우 복잡하다. 이러한 문제를 해결하기 위하여 많은 연구가 이루어져 왔으나, 대부분 단일 사용자 환경에서의 웹뷰 연구로 분산된 환경에서의 적용은 문제가 있다. 이러한 이유로 본 연구에서는 웹뷰 콘텐츠의 운영 상태를 확인할 수 있는 방법으로 기존의 상태 전이 그래프를 확장하고 이에 대한 알고리즘을 제시하여 분산된 환경에서의 웹뷰 콘텐츠의 갱신 및 재-계산 상태 또는 생성되는 과정에서의 상태 변화를 설명할 수 있도록 하며, 구체화 웹뷰를 이용한 실험을 통하여 구체화 웹뷰를 사용하였을 경우와 사용하지 않았을 경우 그리고 네트워크의 상태에 따른 시간 분석과 웹뷰 콘텐츠의 크기에 따른 효율성에 대한 분석을 한다. In a typical web environment, it is difficult to determine the update and re-computation status of WebView content or the transition of WebView processing included in web page. If an update to one of data is performed before a read operation to that, we could get a wrong result due to the incorrect operation and increase a complexity of the problem to process. To solve this problem, lots of researchers have studied and most of these problems at the single user environment is not problems. However, the problems at a distributed environment might be occurred. For this reason, in this paper, we proposed the extended state transition graph and algorithms for each status of WebView for explaining WebView state in the distributed environment and analyze the performance of using the materialized WebView and not. Additionally, also analyze the timing issues in network and effectiveness which follows in size of WebView contents.

금속판과 나사못 또는 나사못 고정을 이용한 중수골 간부 골절의 치료

서진수(Jin Soo Suh),오형근(Hyoung Keun Oh) 대한정형외과학회 2003 대한정형외과학회지 Vol.38 No.2

라디에타소나무 단판적층재의 밀도,접착,강도성능 및 내부후성

서진석 ( Jin Suk Suh ),이동흡 ( Dong Heub Lee ),황원중 ( Won Joung Hwang ),오형민 ( Hyung Min Oh ),박영란 ( Young Ran Park ),강승모 ( Sung Mo Kang ) 한국목재공학회 2011 목재공학 Vol.39 No.4

라디에타소나무 단판적층재(LVL)를 제조함에 있어서, CuAz 및 ACQ 방부처리와 비처리, 수성비닐우레탄 접착제와 페놀변성 리조시놀수지 접착제의 상온경화형 접착제를 적용함에 따른 밀도경사, 접착·강도성능 및 내부후성(방부효력)을 살펴보았다. 결과, LVL의 밀도경사에서 접착층 주변이 원추형으로 밀도가 커지는 경사패턴을 보였다. 접착성은 수성비닐우레탄 접착의 경우, 자비반복시험 후 전층이 박리되거나, 일부 층이 박리하고 할렬·틈새 현상이 일어났다. 페놀변성 리조시놀수지 접착제 접착의 경우, 자비반복시험 후 접착층의 응력이 큰데 연유한 굽음과 상하 접착층 사이의 단판의 수직할렬 현상이 있었으나, 접착층의 박리나 할렬이 거의 발견되지 않아 침지박리접착력은 높은 것으로 판단되었다. 한편, 방부효력시험에 있어서, 수성비닐우레탄 접착제로 적층한 LVL의 경우 갈색부후균에 의한 부후도가 백색부후균보다 크게 나타났다. 페놀변성 리조시놀수지 접착제로 LVL을 제조한 경우에는 갈색부후균에 의한 질량감소가 적었고, 약제를 처리하지 않더라도 그 피해가 낮았으며, 약제처리한 것은 질량감소율 0 수준을 보일 정도로 방부효력이 큰 것을 알 수 있었다. In this study, LVLs of radiata pine were fabricated with non-preservative treated veneers, CuAz treated veneers, and ACQ treated veneers, using aqueous vinyl urethane adhesive and phenol modified resorcinol resin adhesive. Then density gradient, bonding strength, bending properties and decay resistance of LVLs were evaluated. As results, the cone-shaped and higher density gradient pattern was found in layer close to glueline. After cyclic water boiled test, the LVL bonded with aqueous vinyl urethane resin adhesive was delaminated in all layers or partly delaminated including check, chasm in glueline layer. In the case of LVL bonded with phenol modified resorcinol resin adhesive, despite slight cupping due to great glueline stress and vertical check between glueline layers, it was observed that the bonding strength to delamination was higher, owing to most absence of delamination through overall glueline. On the other hand, in the decay test, mass loss by brown rot fungi was greater than white rot fungi in LVL bonded with aqueous vinyl urethane resin adhesive However, in LVL bonded with phenol modified resorcinol resin adhesive, the mass loss by brown rot fungi was slight and non-preservative treated LVL was low. The mass loss of preservative-treated LVL was 0 (zero), showing the high decay resistance effect.

OSB 대체용 국내산 합판의 못 접합부 전단내력 성능

서진석 ( Jin Suk Suh ),황성욱 ( Sung Wook Hwang ),황권환 ( Kweon Hwan Hwang ),정기영 ( Gi Young Jeong ),정하현 ( Ha Hyun Joung ) 한국목재공학회 2012 목재공학 Vol.40 No.4

본 연구에서는 현재 국내 목조건축에서 벽구성 재료로 많이 사용되고 있는 수입 OSB(배향성 스트랜드보드)를 국산 합판으로 대체하기 위해 OSB와 국산 합판의 못 접합부 전단성능을 비교·검토하였다. 주부재(잣나무)와 측면부재(OSB·합판)의 섬유 방향성(평행·직각)에 따른 전단성능은 합판에서 현저하였다. 결과, OSB와 합판 모두 현행 국내 기준인 못 접합부 기준 허용전단내력을 만족하는 것으로 나타났다. 그리고, 표면층에 MLH(열대산 활잡목)를 사용하고 7ply 구성한 합판(P-4 type)은 OSB보다 섬유방향에 관계없이 큰 전단성능을 나타냈다. 전반적으로 측면부재로서 합판을 사용할 경우 주부재에 대하여 섬유방향을 직교되도록 구성할 경우,평행방향 구성보다 큰 전단성능을 발휘할 수 있음이 확인되었다. This study was carried out in order to compare nail shear strength between domestic plywood and imported OSB for structural sheathing members as infill wall of wooden construction. The differences of nail shear strength between parallel-to-grain direction and perpendicular-to-grain direction of sheathing material to frame material were distinct at the plywood composition. The shear strengths of plywood and OSB with nail met current design values. The plywood of P-4 type, which uses MLH at surface layer and constructs 7 ply, showed greater than OSB regardless of grain direction of sheathing material to frame material. When the plywood as sheathing material to frame material was used, it was found out that the overall construction of perpendicular-to-grain direction of plywood had greater nail shear strengths than the construction of parallel-to-grain.

원통형 단판적층재의 접착성 및 도장처리에 따른 표면내구성

서진석 ( Jin Suk Suh ),김종인 ( Jong In Kim ),황성옥 ( Sung Wook Hwang ),박상범 ( Sang Bum Park ) 한국목재공학회 2012 목재공학 Vol.40 No.6

원통형 단판적층재(LVL)의 구조재 이외의 공예재 등의 용도개발을 위하여 원통형 단판적층재의 내수접착성과 도장처리에 따른 내마모성 및 표면경도를 측정하였다. 레조시놀 수지와 경화제(paraformaldehyde)를 100 : 5의 혼합비로 하여 접착·경화한 원통형 단판적층재의 전체적인 접착층에 대한 삶음박리 접착력은 양호한 편이었다. 내마모성은 횡단면이 접선단면보다 상대적으로 우수하였으며, 접선단면에 자외선 차단 오일을 도장 처리한 경우 내마모성이 향상되었다. 표면경도는 횡단면의 경우, 낙엽송 중심재가 라디에타소나무 단판적층 부위보다 높았고, 접선단면의 경우에는 접착층 부위가 단판부위보다 높게 나타났다. In order to develop the end use of cylindrical laminated veneer lumber LVL) such as wooden crafts, the water proof-bonding strength, the resistance to abrasion and the surface hardness by painting the surface of LVL were investigated. The study results were as follows: The water proof-bonding strength through 5 cyclic test by boiling in water immersion and drying were favorable without delamination of glue line. Then the formulation of glue was resorcinol resin (100) to hardener of paraformaldehyde(5)by mixed weight percentage. The resistance to abrasion was relatively higher at cross section than tangential section. When tangential section of LVL was painted by UV protection oil, the resistance to abrasion was improved. In case of a cross section of LVL, the higher surface hardness appeared at larch core than radiate pine LVL. Also, in case of a tangential section of LVL, the higher surface hardness appeared at glue line veneer side.

운륜 모반의 임상적 연구

서진천(Jin Chun Suh),염정섭(Jung Sub Yeum),신동주(Dong Ju Shin),서선교(Seon Kyo Seo),나건연(Gun Yeon Na),서무규(Moo Kyu Suh) 대한피부과학회 2001 大韓皮膚科學會誌 Vol.39 No.6

N/A Background: There have been few clinical studies of halo nevi. Objective : The purpose of this study was aimed at evaluating the clinical and histopathologic features of halo nevi and correlation between halo nevi and vitiligo. Methods : The medical records of 40 patients with halo nevi and biopsy specimens of 30 patients with halo nevi were reviewed. Results and Conclusion . 1. The ratio of male to female patients was 1:1.5. 2. The mean age of the onset was 20.1 years (male: 11.5, female : 25.9). 3. Multiple halo nevi were present in 32.5%(male : 25%, female : 37.5%). 4. The areas in which the lesions developed were head 8c neck(39.1%), back(32.8%), anterior chest(12.5%), abdomen(10.9%), groin(3.1%), and lower extremity(1.6%) in descending order. 5. The mean duration of each color in central nevus was as follows: black(2.7 years), pink(3.5 years), gray(4.9 years) 6. The most common pathology of the central nevus was intradermal(80%). 7. The halo nevi associated with vitiligo were 21 cases(52.5%) out of 40 patients. Among them, the eases with non-segmental vitiligo were 13(61.9%), the cases with segmental vitiligo were 8(38.1%). 8. Out of the 21 cases with halo nevi associated with vitiligo, the cases with halo nevi prior to vitiligo were 4(19.1%), concurrent onset 12(57.1%) and the cases with halo nevi after vitiligo were 5(23.8%). (Korean J Dermatol 2001;39(6): 648~653)

프로젝트 리포트 : 대관령 알펜시아 점프타워 설치공사의 슬립폼 공법 적용

서진선(Suh Jin-sun),한준영(Han Jun-young),임칠순(Im Chil-soon) 대한건축학회 2007 建築 Vol.51 No.10

천연염색ㆍ도장처리 단판의 내변퇴색시험에 따른 색차특성

서진석(Jin-Suk Suh),김종인(Jong-In Kim),김소라(So-Ra Kim),박령재(Ryeong-Jae Park),박상범(Sang-Bum Park) 한국가구학회 2013 한국가구학회지 Vol.24 No.4

In order to evaluate a feasibility of industrial art use of veneer such as cylindrical laminated veneer lumber, the veneers of 4 species of Korean pine, radiata pine, yellow poplar and Japanese cypress were natural dye-colored and clear finished. Natural dyes were red color originated from sappanwood, blue color from polygonum indigo, and yellow color from Amur cork tree and gardenia. the clear coats of crack seal clear and UV protection oil were applied on the dyed veneer. The dyeing and finishing characteristics through fading test were summarized as follows; In non-dyed and non-finished Korean pine veneer, lightness was decreased and yellow and red hues increased after fading test. In natural dyed- and finished- veneer, color difference of gardenia-mixed Amur cork tree was generally highest, and that of polygonum indigo was lowest. Compared to non-treatment of veneers of Korean pine and yellow poplar, color difference decreasing effect by finishing was shown in crack seal clear and UV protection oil. In addition, UV protection oil was more favorable than crack seal clear with more decreased color difference. In result, maximum values of color difference after fading for 8 days were recorded about 16 to 20, which are remarked ‘very much’ of 12.1 or more when reviewing with ‘National bureau of standards unit in USA’.

방사선요법으로 치유된 안와내 악성임파종 1 예

서진활(Jin Hwal Suh),김동건(Dong Gun Kim),김형전(Hyung Jeon Kim) 대한안과학회 1989 대한안과학회지 Vol.30 No.2