OLT의 QoS 기능 구현

한성수,이순흠,이병수 순천향대학교 부설 산업기술연구소 2005 순천향 산업기술연구소논문집 Vol.11 No.2

In this paper, Implemented QoS functions are described which are key functions of OLT in the implemented EPON system which is considered currently as a economical solution of FTTH. The implemented QoS functions use L2/L3/L4 header information and provide different services and quality

소파커버의 연소특성에 관한 연구

이광흠,박영근,윤명오,현성호,김동일 한국화재소방학회 2003 한국화재소방학회논문지 Vol.17 No.2

본 연구는 다중이용업소에서 사용하고 있는 실내내장재료 중 소파커버의 인조가죽 5종에 대하여 연소시 위험성 요소인 착화성, 난연성, 열방출율, 독성가스를 평가하였다. 연구결과 Artificial Leather 1~5의 착화온도는 427~43℃, 산소지수는 19~20%로 나타났다. 또한 25 kw/m²의 복사열에서 착화시간은10~16초, 최대열방출율은 147~277 kW/ m²이었으며, 35 kW/ m²의 복사열에서 착화시간은 6~9초, 최대열방출율은 176~296 kw/m² 및 일산화탄소(CO)는 5,550~6,290 ppm, 이산화탄소(CO²)는 18,5OO~23,400 ppm, 염화수소(HCl)는 110~140 ppm, 시안화수소(HCN)은 13~65 ppm, 질소산화물(NO_(x))은145~220 ppm이 발생하는 것으로 나타났다. In this study, we tried to evaluate the ignitibility, flammability, heat release rate, and toxicity of five different types of burning artificial leather sofa covers that are widely used in entertainment service industry buildings. As the results of this study; Putting the artificial leathers under fire conditions we found out following results : auto-ignition temperature was 427~437℃, limiting oxygen index was 19~20%; at heat flux of 25 kW/ m², ignition time was 10~16s and peak heat release rate was 147~277 kW/m²; and at heat flux of 35 kW/ m², ignition time was 6~9s and peak heat release rate was 176~296 kW/ m². The toxic materials discharged from the burning leathers were 5,550~6,290 ppm of CO, 18,500~23,400 ppm of CO², 110~140 ppm, of HCl, 13~65 ppm of HCN and 145~220 ppm of NO_(x).

Polystyrene/Cd arachidate 혼합 LB막의 제조와 구조적 성질

박연흠,남성우,박성윤 成均館大學校 科學技術硏究所 1992 論文集 Vol.43 No.2

The spreading behavior of mixed monolayer of polystyrene with arachidic acid at the air-water interface was studied by measuring the surface pressure(π)-surface area per molecule(A) isotherms. Since polystyrene has no hydrophilic group, the π -A isotherms appear to support that polystyrene exists in a dense spherical form at the air-water interface. The observed transfer ratio and wettability indicated that the mixed LB films have been deposited in Y-type. Through the X-ray diffraction measurements, the structure of polystyrene/Cd arachidate mixed LB films has been confirmed as well-ordered structure.

급성 충수염에서 의사에 의한 수술지연이 수술후 경과에 미치는 영향

조병욱,박성흠,윤서구,최경우 대한대장항문학회 1998 Annals of Coloproctolgy Vol.14 No.3

Bisthmus 제재와 항생제의 복합 투여가 Helicobactor pylori 박멸과 재발에 미치는 영향

김선주,황성규,박상흠,이문호 순천향대학교 1994 논문집 Vol.17 No.4

위점막내에 존재하는 Helicobacter pylori는 소화성 궤양의 발생과 재발에 중요한 인자로 인식되고 있으며, bisthmus, metronidazole, amoxicillin을 포함하는 3제 병합요법을 시행하면 H. pylori균의 박멸에 유효하고 소화성 궤양 재발 빈도를 낮출 수 있다고 한다. 그러나 3제 병합요법은 부작용 발생율이 높아 치료 실패의 주원인이 되고 있다. 이에 저자등은 H. pylori 양성인 소화성 궤양환자에서 H₂ 길항제 투여와 함께 3제 병합요법을 시행하였고, 또한 비교적 약제 부작용이 많은 metronidazole을 제외한 이제 병합 요법을 시행하여 H₂ 길항제 단독 투여한 대조군과 6개월간 추적하여 균의 박멸및 재발 여부를 비교 관찰하였다. 대조군은 Nizatidine을 8주간 투여하였으며 치료 1군은 nizatidine(150mg 하루 2회 복용)을 8주간 투여하고 첫 2주간은 TDB(240mg 하루 2회 복용), amoxicilline(500mg 하루 4회 복용) 투여하였다. 치료 2군은 nizatidine(150mg 하루 2회 복용)을 8주간 투여하고 첫 2주간은 TDB(240mg 하루 2회 복용)과 amoxicilline(500mg 하루 4회복용) metronidazole (250mg thrice a day)을 투여하였다. 치료 8주후 치료 1군은 53%에서, 치료 2군은 100%에서 균이 음전되었으나 대조군은 1예도 음전되지 않았다. 치료 2군의 13%에서 약물에 의한 부작용이 관찰되었다. 치료 6개월 추적 검사시 대조군은 모두 H. pylori 감염이 지속되었으며 치료 1군에서는 63%에서 재발하였으며, 치료 2군에서는 15%에서 재발하였다. 대조군에서는 소화성 궤양(위궤양 1명, 십이지장 궤양 4명)이 5명에서 재발하였으나 치료군에서는 재발이 없었다. H. pylori박멸된 환자에서의 항 H.pylori 항체(IgG)가는 치료 6개월에 치료전의 40%로 감소한 반면, 대조군의 항체가는 변화가 없었다. 이상의 결과로 H₂ 길항제(nizatidine)을 metronidazole 750mg/day, TDB 480mg/day, amoxicillin 2.0gm/day를 2주간 투여하면 약제에 의한 합병증이 비교적 적고, Helicobacter pylori 박멸과 재발 방지에 효과적이며 혈청 H. pylori 항체(IgG)의 추적 검사는 항 H. pylori 치료후 균박멸의 추적검사에 유용함을 알 수 있었다. It has recently been recognized that Helicobacter pylori is a important factor in the development and the recurrence of peptic ulcer diseases. Several studies has been shown that the eradication of Helicobacter pylori is associated with considerable reduction in the the rate of recurrence of peptic ulcer. Triple therapy including bisthmus, amoxicillin, metronidazole is known to be useful in the eradication of Helicobacter pylori, but relatively frequent side effects are a major problem. This study was performed to evaluate the clinical course and the efficacy of triple therapy with H₂ blocker and bisthmus plus amoxicillin therpy with H₂ blocker in the eradication and the recurrence of Helicobacter pylori at 8 weeks and 6 months of treatment. Forty five patients with peptic ulcer disease with a positive urease test of the gastric mucosa were enrolled and assigned to receive H₂ blocker (nizatidine 150mg twice a day) for 8 weeks(control group), tripottasium dicitrato bismuthate 240mg twice a day and amoxicillin 500mg four times a day for 2 weeks, nizatidine for 8 weeks (treatment group Ⅰ), tripottasium dicitrato bismuthate 240mg twice a day and amoxicillin 500mg four times a day, metronidazole 250mg thrice a day for 2 weeks, nizatidine for 8 weeks(treatment group Ⅱ). H. pylori was eradicated in 53% of treatment group Ⅰ, 100% of treatment group Ⅱ, none of control group after 8 weeks of treatment. Helicobacter pylori infection is recurred in 63% of of treatment group Ⅰ and 15% of treatment group Ⅱ. Side effects were recorded in 3 patients(2 patients on treatment group Ⅱ, 1 patient on treatment group Ⅰ), but it were minor side effects. No patients on treatment groups recurred peptic ulcer disease, while 5 patients on control group. Anti-H. pylori antibody IgG remained constant in bacteria positive control group, but in patients in whom H. pylori had been eradicated serum antibody titers fell significantly at 6 months of treatment. In conclusion, triple therapy including a low dose metronidazole with nizatidine is effective on the eradication of Helicobacter pylori infection and reduced the rate of side effects. Bisthmus and amoxicillin with nizatidine is not effective on the eradication and the recurrence of Helicobactor pylori infection. Serologic tests for H. pylori are reliable means of monitoring success of eradication of H. pylori.

Linear Accelerator를 이용한 Stereotactic Radiosurgery

정상섭,윤도흠,오성훈,김선호,서창옥,추성실,노준규,김동익,서정호 대한신경외과학회 1988 Journal of Korean neurosurgical society Vol.17 No.6

A Modified irradiation technique utilizing a linear accelerator for radiation surgery within the brain was performed in 4 patients. Three of them had brain tumors and one small arteriovenous malformation in midbrain. A Hitchcock stereotactic apparatus and a 10 MeV linear accelerator have been adapted and special computer programs for dosimetry were obtained and studied experimentally with a phantom model. Stereotactic radiosurgery is a valuable tool in the treatment of inoperable, deep seated intracranial lesions, the major advantage being high efficacy and smoothness of the procedure, as well as short hospitalization times.

간헐적 복통과 혈변이 동반된 성인의 맹장-결장 회전결여증 1예

정서진,박성흠,윤서구,박치구,최경우 대한대장항문학회 1998 Annals of Coloproctolgy Vol.14 No.3

파킨슨씨병 환자에 있어서 자가부신수질 이식술

정상섭,박상근,오성훈,김선호,윤도흠,박정수,양우익,최인준,안영수,김경환,박창일,김진수,이현철 대한신경외과학회 1988 Journal of Korean neurosurgical society Vol.17 No.6

Recent experimental studies and clinical cases have suggested that grafting tissue from the adrenal medulla into the brain may alleviate the symptoms of Parkinson's disease. Autologous adrenal medullary grafts into the striatum was performed stereotactically in two patients with Parkinson's disease. Both patients were bedridden preoperatively, but 4 months after the surgery both became ambulatory and one was even capable of returning to his job. Even though the number of cases was small⑵ and the follow-up period was short, this study shows that adrenal medullary transplantation into the striatum may have some beneficial effects in patient with Parkinson's disease. Further experimental and clinical trials are necessary to see whether this procedure will be a recommendable surgical treatment for patients suffering from Parkinson's disease.

Insecticidal Activities of Plant Essential Oils against Bemisia tabasi Q type Adults and Aedes aegypti larvae

Seong Heum Yeon,Yu Wha Kim,Min Joon Kim,Soon-Il Kim 한국농약과학회 2014 한국농약과학회 학술발표대회 논문집 Vol.2014 No.10

Multi-View Object Extraction With Fractional Boundaries

Seong-Heum Kim,Yu-Wing Tai,Jaesik Park,In So Kweon IEEE 2016 IEEE TRANSACTIONS ON IMAGE PROCESSING - Vol.25 No.8

<P>This paper presents an automatic method to extract a multi-view object in a natural environment. We assume that the target object is bounded by the convex volume of interest defined by the overlapping space of camera viewing frustums. There are two key contributions of our approach. First, we present an automatic method to identify a target object across different images for multi-view binary co-segmentation. The extracted target object shares the same geometric representation in space with a distinctive color and texture model from the background. Second, we present an algorithm to detect color ambiguous regions along the object boundary for matting refinement. Our matting region detection algorithm is based on the information theory, which measures the Kullback-Leibler divergence of local color distribution of different pixel bands. The local pixel band with the largest entropy is selected for matte refinement, subject to the multi-view consistent constraint. Our results are high-quality alpha mattes consistent across all different viewpoints. We demonstrate the effectiveness of the proposed method using various examples.</P>