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문윤재(Yoon Jae Moon),황준영(Jun Young Hwang),강희석(Heuiseok Kang),강경태(Kyungtae Kang),문승재(Seung-Jae Moon) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
Electrical sintering of silver nanoparticles was performed using operational amplifier (OP amp) to apply a constant DC current. Conducting lines were printed on glass substrate by a drop-on-demand (DOD) inkjet printer and silver nanoparticle ink. Specific resistance and microstructure of sintered silver lines and were measured with varying DC current. Sintering process finished within a few milliseconds. Increasing applied DC current, specific resistance decreased and gain size increased. Achievable minimum specific resistance is approximately two times higher than specific resistance of bulk silver.
만성 염증성 장질환 환자에서 항호중구 세포질 항체의 의의
문윤재(Yoon Jae Moon),배희동(Hee Dong Bae),박효진(Hyo Jin Park),김원호(Won Ho Kim),정석훈(Suk Hoon Chung),김현숙(Hyun Sook Kim),전재윤(Chae Yoon Chon),박인서(In Suh Park) 대한내과학회 1997 대한내과학회지 Vol.52 No.5
N/A Objective: Anti-neutrophil cytoplasmic antibody (ANCA), known as a useful diagnostic marker in patients with ulcerative colitis (UC), are specific for granule proteins of granulocytes and monocytes and induce distinct fluorescence patterns. To evaluate the significance of ANCA in chronic inflammatory bowel disease (IHD), the presence of ANCA in chronic IBD was studied using indirect immunofluorescent test (IIF), Methods: Between March, 1994 and September 1995, 51 patients with chronic inflammatory bowel disease were subjected in this study. We had analysed the correlation between duration, disease activity, location by colonoscopy and radiologic examinations, steroid treatment. Results: 1) Among 34 patients with ulcerative colitis (UC), ANCA was demonstrated in 23 patients (67.6%). Among 19 patients with other chronic IBD (4 Crohn's disease, 6 Behcet's colitis, 7 intestinal tuberculosis and 2 radiation colitis) 2 patients (10.5%) had ANCA. The positivity of ANCA in patients with UC was significantly higher than in patients with other chronic IBD. 2) In patients with UC, c-ANCA was positive in 2 (5.9%) patients and p-ANCA was positive in 21 (61.8%) patients. In patients with other chronic IBD, ANCA was positive in one patient with Behcet's colitis or one patient with intestinal tuberculosis but negative in all patients with Crohn's disease or radiation colitis. 3) The mean duration of disease in ANCA positive patients was 42.4±39.4 months and the mean duration of disease in ANCA negative patients was 44.9±36.8 months, but there was no significant difference. 4) The number of patients in clinically mild, moderate and severe group were 23 (37.6%), 6 (83.2%) and 5 (14.7%) respectively. Among these groups the number of ANCA positive patients were 15 (65.2%), 5 (83.2%) and 3 (60%) respectively, but there was no significant difference. 5) The number of patients with proctitis, left side colitis and pancolitis were 9 (26.5%), 14 (41.2%) and 11 (32.4%) respectively, Among these groups the number of ANCA positive patients were 4 (44.4%), 10 (71.4%) and 9 (81.8%) respectively, but there was no significant difference. 6) Among 13 patients with steroid treatment 9 patients (69.2%) were ANCA positive. Among 21 patients without steroid treatment 16 patients (76.2%) were ANCA positive, but there was no significant difference. Conclusion: Although there was no correlation between ANCA and duration, disease activity, location or steroid treatment in UC patients, ANCA could be a diagnostic marker of UC in chronic IBD patients.
윤재문,김선아,노주헌.Jae Moon Yoon. M.D.. Sun A Kim. M.D.. Joo Heon Roh. M.D.. Ph.D 대한안과학회 2008 대한안과학회지 Vol.49 No.12
Purpose: To evaluate the long-term effectiveness of different surgical procedures according to horizontal eyelid laxity in correcting involutional entropion. Methods: This retrospective study reviewed 104 eyes of 79 patients with involutional lower eyelid entropion who underwent surgical repair. The 62 eyes with horizontal eyelid laxity were classified as group I. In 17 eyes of group I, we performed the lateral tarsal strip procedure alone (group Ia), while in 45 eyes of group I, we performed the lateral tarsal procedure and Quickert suture (group Ib). The 42 eyes without horizontal eyelid laxity were classified as group II. In 13 eyes of group II, we performed a lower eyelid retractor reinsertion procedure only (group IIa), and in 29 eyes of group II, we performed combined lower eyelid retractor reinsertion and orbicularis resection (group IIb). Results: The recurrence rate in these four surgical subsets (group Ia , group Ib, group IIa, group IIb) was 11.7%, 0%, 15.4%, and 6.9%, respectively, with an average follow-up of 11 months. Six recurrent eyelids and two overcorrected eyelids successfully underwent procedures to correct recurrent entropion and ectropion, respectively. Conclusions: The lateral tarsal strip procedure is an effective approach for achieving long-lasting correction of involutional entropion with horizontal eyelid laxity, whereas the lower eyelid retractor reinsertion procedure is an effective approach for achieving long-lasting correction for involutional entropion without horizontal eyelid laxity. Use of the Quickert suture reduced the need to repeat the lateral tarsal strip procedure and additional orbicularis resection decreased the need to repeat the lower eyelid retractor reinsertion procedure. J Korean Ophthalmol Soc 2008;49(12):1877-1887
무장발사장치 체계성능분석을 위한 시뮬레이터 개념 모델링 사례
윤재문,Yoon, Jae-Moon 한국군사과학기술학회 2009 한국군사과학기술학회지 Vol.12 No.4
This paper describes a conceptual model for the performance analysis simulator of a weapon launching system. The system performance analysis simulator is envisioned to provide an integrated analysis environment in which the system performance and operational effectiveness can be analyzed in more rapid and efficient way. The conceptual model for the simulator describes a referent independently of specific technology and implementation, and it can be used to transform the simulator requirements into the simulator system specifications.
나이관련황반변성에서 광역학요법 후 발생한 망막하출혈의 임상분석
윤재문,김호숭,강재훈,윤희성,Jae Moon Yoon,M,D,Ho Soong Kim,M,D,Jae Hoon Kang,M,D,Hee Sung Yoon,M,D,Ph,D 대한안과학회 2008 대한안과학회지 Vol.49 No.10
Purpose: To evaluate the clinical features of subretinal hemorrhage after photodynamic therapy in eyes with exudative age-related macular degeneration. Methods: We retrospectively reviewed data for 267 eyes of 243 patients who had undergone PDT for the treatment of ARMD between January 2005 and December 2006. Best corrected visual acuity, fundus photography, fluorescein angiography, and ICG angiography were performed before and after treatment. We followed up the patients at 1 week, 1 month, and 3 months after treatment and at 3-month intervals thereafter. Results: Postoperative subretinal hemorrhage was seen in 36 (13.4%) of 267 eyes. The pretreatment and post-treatment mean visual acuities were logMAR 0.80 and logMAR 1.05 respectively, representing a decrease of 2.05 lines. On FAG, two eyes were predominantly classic, four eyes were minimally classic, and 30 eyes were occult. The laser irradiation spot size was under 3,000 μm in one case and from 3,000 μm to 5,000 μm in 19 cases and over 5,000 μm in 16 eyes. Conclusions: Subretinal hemorrhage after PDT for ARMD can be a common complication in patients who have been treated for larger irradiation spot sizes and for pigment epithelial detachment (PED), so doctors should be aware of the risk of serious hemorrhagic complications in such situations. J Korean Ophthalmol Soc 2008;49(10):1603-1610