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노승환,신성호 국립7개대학공동논문집간행위원회 2001 공업기술연구 Vol.1 No.-
Embedded system is used in wide areas, because of its low power consumption, stability and various functions. Especially, it enables web based control over internet without timewise and spatial restrictions. In this paper, as a case study of embedded system application, we developed internet boiler controller that enables remote control. In developing the software we take into consideration various problems such as security and data reliability etc. and subsequent problems are reviewed.
기장근,노승환 公州大學校工科大學生産技術硏究所 1998 論文集 Vol.6 No.-
This paper presents the application scheme of distributed B-NT system. The distributed B-NT system consists of head node, ring network node, CANS(Centralized Access Node System) and HANS(Home ATM Node System). In this paper ATM cell transfer delay between subscribers, cell loss and cell transfer ratio of head node per each input port according to the various structures of B-NT system and change of input traffic are presented. The results of this paper will be used in constructing the optimized B-NT system.
기장근,노승환 公州大學校工科大學生産技術硏究所 1997 論文集 Vol.5 No.-
This paper presents development of a simulator in which ATM cell transmission delay time between subscribers, average queue length and cell loss of each system can be obtained according to the various structures of B-NT system and change of input traffic. The simulator consists of graphic user interface module, simulation program automatic generator module, B-NT system model library, etc. The results of simulation for the performance analysis of the B-NT system are also presented.
김정념,이숭환,김정식,김진호,배윤오,박성규,윤상정,한현영,이헌영 충남대학교 의과대학 의학연구소 2003 충남의대잡지 Vol.30 No.1
Omental infarction, the end result of impaired perfusion to the greater omentum, is a rare benign self-limiting clinical entity. The main clinical symptom is non-specific localized abdominal pain with a moderately raised white blood cell and erythrocyte sedimentation rate. These findings often mimic an abdominal surgical emergency. This condition is often misdiagnosed as acute appendicitis or cholecystitis. The characteristic feature of CT scan and ultrasonography provide non-invasive diagnosis in most patients with omental infarction. We report a case of patient whose CT scan showed the characteristic finding of omental infarction. The patient was improved spontaneously only with conservative care.
동일한 시료에 대한 국내 기관간의 STR 분석결과 비교 : STR 유전자좌 분석법의 표준화 설정을 위하여
박종태,신경진,양윤석,우광만,이숭덕,이승환,이정빈,정연보,조승희,한길로,한면수,홍승범 大韓法醫學會 2001 대한법의학회지 Vol.25 No.1
This paper described a collaborative exercise intended to see what kinds of short tandem repeat (STR) loci are used in different DNA typing laboratories in Korea and to compare their results for the demonstration whether uniformity of DNA profiling results from different laboratory could be achieved in Korea Laboratories were asked to test five tissue DNAs using methods routinely used in each laboratory and to report the results to the coordinating laboratory. The exercise demonstrated that each laboratory was using different STR loci for the typing with different STR numbers,2 VNTRS,36 STRs and amelogenin in total, and the direct comparison of the results from all the laboratory for the 18 loci could not be done as only one laboratory submitted typing results. Among 21 loci for which several laboratories submitted typing results, results for 14 loci were the same and results for the other 7 loci were different depending on the participating laboratory. D1S80, F13A01, D16S539, D21S11, D18S51, D3S1744 were the loci with different typing results. Even in the cases where commercial kits were used, the results were not the same depending on the machines used, that is the capillary electrophoresis or the gel based electrophoresis. The reason for the different results, points about the standardization of the methods arid the profiling data were described.
간세포암종 환자에서 간동맥색전술후 혈청 Angiogenin , bFGF 및 EGF의 상승
이숭환(Soong Hwan Lee),조용현(Yong Hyeon Jo),김병훈(Byoung Hun Kim),김홍주(Hong Ju Kim),이창화(Chang Hwa Lee),이재영(Jae Young Lee),남승우(Seung Woo Nam),백인규(In Kyu Paik),박찬현(Chan Hyun Park),이동후(Dong Hoo Lee) 대한소화기학회 1996 대한소화기학회지 Vol.28 No.3
N/A Background/Aims: Angiogenesis, the induction of the formation of blood vessels, is critical to the development, progression, and metastasis of animal and human tumors. Tumor cells may produce factors which either induce or inhibit angiogenesis and that the onset of angiogenic activity is determined by the balance of these factors may be generalizable to other tumors. Hepatocellular carcinoma is hypervascular tumor and transcatheter arterial embolization(TAE) is widely used to treat patients with unresectable hepatocellular carcinoma. To evaluate changes of angiogenic factors after TAE for hepatocellular carcinoma, we investigated serum angiogenin, bFGF and EGF at the pre-TAE and the post-TAE among the seven patients with hepatocelluar carcinoma. Methods: Angiogenin, bFGF and EGF concentrations in sera were measured at pre-TAE and 3 days after TAE by employing ELISA. The statistical analysis was evaluated by Student's t-test. Results: 1) Angiogenin concentration at pre-TAE and post-TAE was 197.57+28.82ng/ml(mean+standard error) and 225.89>32.06ng/ml, respectively(p=0.022). 2) bFGF concentration at pre-TAE and post-TAE was 6.71+1.83 pg/ml and 21.68+5.58 pg/ml, respectively(p=0.036). 3) EGF concentra- tion at pre-TAE and post-TAE was 195.09+40.29 pg/rnl and 258.11+36.12 pg/ml, respectively (p=0.014). No correlation, however, was present among angiogenin, bFGF, and EGF at both of pre-TAE and post-TAE state. Conclusions: These results indicate that certain angiogenic factors, such as angiogenin, bFGF, EGF, were increased significantly at post-TAE in comparison to pre- TAE, which may reduce the therapeutic effect of TAE for hepatocellular carcinoma. We suggested that the tissue injury/destruction associated with ischemia by hepatic artery embolization are generally considered to represent a fundamental stimulus for angiogenesis in post-TAE. Therefore, suppression of angiogenesis at post-TAE may be important in improving survival for the patients with hepatocellular carcinoma since tumor growth and metastasis are angiogenesis-dependent. (Korean J Gastroenterol 1996; 28:391 - 401)
SCM의 파트너십 촉진요소가 협력적 SCM 지향성에 미치는 비대칭적 영향에 대한 연구
정승환(Soong Hwan Chung),최강화(Kanghwa Choi) 한국SCM학회 2015 한국SCM학회지 Vol.15 No.1
The purpose of this study is to investigate impacts of partnership between Defense Acquisition Program Administration(DAPA) and defense-related industry on supply chain management (SCM) orientation using the asymmetric regression and KANO model. The examinations of the asymmetric relationships between SCM promotion factors and SCM orientation was done using KANO model and regression with dichotomized dummy variables. We find an asymmetric relationship between SCM promotion factors and SCM orientation, thereby confirming the four-factor(attractive/basic/must-be/irrelevance) theory in the context of collaborative SCM orientation.
LoRa 망에서 이중 홉 디코드-포워드 릴레이의 성능평가
노승환(Soong Hwan Ro),티엔 뉴옌 호아(Tien Nguyen Hoa) 한국통신학회 2022 한국통신학회 학술대회논문집 Vol.2022 No.2
이 연구에서는 LoRa 네트워크에서 이중 홉 디코딩-포워드의 성능 평가에 대한 성능평가를 하였다. 특히, 에지-ED(Edge-End Device)의 커버리지 확률(Pcov)과 스펙트럼 효율이 폐쇄형 표현식으로 계산되었다. 제안된 프레임워크를 기반으로 스펙트럼 효율과 커버리지 확률을 최대화하기 위한 에지-ED의 전송 전력과 함께 최적화하기 위한 릴레이 위치를 제안하였다.