콘크리트의 균열폭이 중성화와 철근 부식에 미치는 영향

유제준 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2

The study aims to investigate the corrosion of steel in carbonated concrete. The parameters of the specimens are crack Widths and water cement ratio of concrete. The results indicate that the corrosion area of steel increase with increment in the widths of crack. The weight loss is no significant relationship with the crack widths. Although the corrosion depth is large in the position of a crack, there is no influence of crack widths.

접촉연소검지방식을 이용한 후막형 메탄가스센서의 제조 및 그 특성

박준식,이재석,홍성제,박효덕,신상모 경북대학교 센서기술연구소 1995 센서技術學術大會論文集 Vol.6 No.1

본 연구에서는 스크린 프린팅 기술을 이용한 병렬저항열원을 갖는 후막형 가연성 가스센서를 제조하고, 메탄가스에 대한 감도특성을 조사하였다 알루미나 기판의 양면 위에 제조된 병렬형 백금 후막발열체는 후막형 백금 저항체로 사용된 백금페이스트 온도 감지 특성과 표면 특성을 조사하여 paste A로 선정하였다. 제조된 백금 후막 발열체는 평균저항값이 1.8Ω이고, TCR값은 3685ppm/℃이었다. 제조된 백금 발열체상에 Pt과 Pd이 첨가된 촉매 페이스트를 제조하고 가지부는 Pt과 Pd가 첨가된 촉매를 스크린 프린팅하여 후막을 형성하고 열처리하여 제조하였다. 제조된 후막형 센서는 메탄가스에 대해 4.3mV/1009ppm의 감도를 보였으며, 소비전력은 2.12W이었다. We fabricated the sensors with parallel Pt heaters using screen printing process and investigated sensitivities to hydrocarbon gases. The paste A was selected as Pt paste for heater by investigated the properties of TCRs and thick film microstructures. The average resistance of parallel Pt heaters was 1.8Ω, and the best TCR obtained was 3685ppm/℃. On the top of the Pt heaters, a sensing layer added with Pt and Pd as catalyst paste was screen printed and heat treated. The sensitivity of fabricated the sensor was 4.3mV/1000ppm to methane. The power consumption of the sensors was 2.12watts

고강도 콘크리트를 사용한 플랫 플레이트 구조의 기둥-슬래브 접합부 강성에 관한 연구

김형기,유제준 대한건축학회 2005 大韓建築學會論文集 : 構造系 Vol.21 No.2

In this study, the four column-slab connections in flat plate system using high strength concrete exceeding 60㎫, modeled after a typical reinforced concrete flat plate building, were tested under combined gravity and lateral loadings. The variables selected for this study were the slab reinforcement ratio and the level of slab gravity load. The test results were compared with the stiffness predictions of elastic finite element analysis, the ACI equivalent frame method and the AIJ method. The followings were found: 1) The stiffness of column-slab connection under gravity loading reduced as the slab gravity load increased. At the level of service gravity load, the gravity stiffness was about 70 percent of initial stiffness. 2) The lateral stiffness of column-slab connection decreased with increasing the lateral deflection and was dependent on the level of slab gravity "load and slab reinforcement percentage. 3) The initial lateral stiffness was about 50 percent of elastic finite element analysis in lateral drift ratio of 0.0625 percent. This was attributed to the accelerated slab cracking around the connection as a result of the increased gravity load moments. 4) The lateral stiffness varied from 24 to 37 percent of elastic finite element analysis and from 17 to 26 percent of ACI equivalent frame method in lateral drift ratio of 0.2 percent. This result gave agreement with other researcher's test result of column-slab connection in flat plate system using normal strength concrete.

Surgical Management of Large Adnexal Cyst : Two-incision Laparoscopic-Assisted Transumbilical Extracorporeal Adnexal Cystectomy (LATEC)

( Jei Jun Bae ) 대한산부인과학회 2012 대한산부인과학회 학술대회 Vol.98 No.-

Object: Recent reports suggest that single-incision laparoscopic surgery, also known as single port surgery, is technically feasible in treating a various disease. But, 25 mm sized skin incision of single incision laparoscopic surgery is very long for cosmesis. So, we developed and applied a simplified two-incision laparoscopic-assised transumbilical extracorporeal adnexal cystectomy using traditional trocar. Methods: For LATEC, Following insufflation with CO2 to a pressure of 10 mm Hg, two 10-mm umbilical trocar were inserted at umbilicus. and 30-degree laparoscope was introduced. Under laparoscopic guidance, needle aspiration of the cyst was performed. The 10-mm trocar was removed, the deflated cyst and adnexa were exteriorized through the umbilicus for either cyst excision with adnexal preservation. Conclusion: Two-incision LATEC is a relatively simple procedure that combines laparoscopy and traditional extracorporeal surgery. and this procedure may have the better advantage of laparoscopy such as rapid recovery and exellent cosmesis, with only umbilical two incision and may offer a better chance for adnexal preservation.

Expression of Endothelin-1 by Stimulation with CXCL8 in Mouse Peritoneal Macrophages

Jei-Jun Bae,Jung-Hae Kim,Hoon Kim,Hee-Sun Kim 대한미생물학회 2009 Journal of Bacteriology and Virology Vol.39 No.3

Characteristic of Steel Corrosion in Carbonated Concrete

( Jei Jun You ),( Yoshiteru Ohno ) 한국부식방식학회(구 한국부식학회) 2005 Corrosion Science and Technology Vol.4 No.4

골반 방선균증에 대한 임상적 고찰

배제준 ( Jei Jun Bae ),김진희 ( Jin Hee Kim ),박윤기 ( Yoon Kee Park ),이두진 ( Doo Jin Lee ),고민환 ( Min Whan Koh ),이태형 ( Tae Hyung Lee ),이승호 ( Sung Ho Lee ) 대한산부인과학회 2007 Obstetrics & Gynecology Science Vol.50 No.8

우선심사제도

유제준(Jei-Jun You) 한국콘크리트학회 2009 콘크리트학회지 Vol.21 No.6

복강경시술 중 발견된 Fitz-Hugh-Curtis증후군의 임상적 고찰

배제준 ( Jei Jun Bae ),이대형 ( Dae Hyung Lee ),고민환 ( Min Whan Koh ) 대한산부인과학회 2009 Obstetrics & Gynecology Science Vol.52 No.5

목적: 복강경수술 시 우연히 발견된 FHC증후군 환자들의 임상적 특성, 혈액학적 특성 및 골반 유착정도 및 유착박리술 후 우상복부 동통의 개선되었는지를 알아보고자 하였다. 연구 방법: 2001년 1월 1일부터 2006년 12월 31일까지 영남대학교병원 산부인과에서 1399예의 복강경시술 중 발견된 FHC증후군 40예에 대한 의무기록을 후향적으로 조사하였다. 환자의 과거력, 수술 후 주 진단명, 간기능이상 유무, 우상복부통, 골반강 내 유착의 정도, 간주위 유착의 정도, 과거력 등을 검토하였다. 결과: 환자의 연령 분포는 16세에서 65세였으며 평균 연령은 32.9세로 성적으로 활동적인 가임기여성이 대부분을 차지하였다. 복강경수술 시 주 진단은 난소난관농양을 포함한 골반염이 전체 FHC증후군 중 14예(35%)를 차지하였고, 자궁근종이 9예(22.5%), 양성 난소난관종양이 7예(17.5%), 자궁외임신이 6예(15%), 자궁내막증이 5예(12.5%), 골반결핵이 1예(2.5%)였다. FHC증후군으로 진단된 40예의 과거력을 살펴보면 4예 (10%)에서 자궁외임신의 과거력이 있었고 14예(5%)에서는 골반염이, 3예(7.5%)에서 폐결핵의 병력이 있었고 이 중 1예는 수술 후 AFB 염색 및 배양검사에서 골반 결핵으로 진단받았다. 12예(30%)에서 과거 개복수술이나 복강경수술의 과거력이 있었으며 2예(5%)에서 자궁 내 장치 사용의 경험이 있었다. 결론: 본 연구결과 FHC증후군은 골반 내 염증성 질환 및 자궁외 임신에 이환된 환자에게서 자주 발견되며 자궁근종이나 난소난관종양, 자궁내막증 및 골반결핵 환자에서도 발견되었다. 이는 불분명한 위장관 증상, 우상복부 동통 등의 과거력이 있는 환자 및 부인과질환으로 시행하는 모든 복강경수술 시 우상복부, 특히 주위 공간을 관찰하는 것이 필요하다고 생각되며, 향후 정확한 빈도와 원인에 대한 전향적이고 광범위한 연구가 필요하다고 사료된다. Objective: The aim of this study was to analyse the characteristics, severity of Fitz-Hugh-Curtis syndrome (FHCS), pelvic adhesions and hematologic findings of incidentally founded FHCS in laparoscopy. Methods: We retrospectively reviewed the medical records of 40 patients incidentally found laparoscopically as FHCS at the department of obstetrics and gynecology of Yeungnam University Hospital from Jan. 2001 to Dec. 2006. Severity of FHCS and pelvic adhesions were classified and characteristics of patients, hematologic findings, past medical histories and symptoms after surgery were analysed. Results: The ages of the cases varied between 16 and 65 years old. Mean age of cases was 32.9 years. Indications of surgery were uterine myoma, benign adnexal mass, ectopic pregnancy, endometriosis, chronic pelvic pain and pelvic tuberculosis. From this study we can notice that FHCS can be found out most frequently in the patient with pelvic inflammatory disease (PID). Past medical history were pelvic inflammatory disease, ectopic pregnancy, abdominal surgery and pelvic tuberculosis. 17 patients had been suffered from RUQ pain and 10 patients (58.8%) were in good health after adhesiolysis. Conclusion: Laparoscopy is a confirmative tool in the diagnosis of FHCS. Direct observation of perihepatic space is the most definitive method of diagnosing this syndrome. From our study, we can find that FHCS can be diagnosed frequently in the patient with pelvic inflammatory disease, ectopic pregnancy and pelvic tuberculosis. So, We recommend that investigating the perihepatic space during surgery is a good treatment especially in patients with PID, vague abdominal discomfort and pains.

특허기술에 대한 최근동향

유제준(Jei-Jun You) 한국콘크리트학회 2010 콘크리트학회지 Vol.22 No.5