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개선한 일회성 난수를 이용한 RFID 상호인증 프로토콜
윤은준(Eun-Jun Yoon),유기영(Kee-Young Yoo) 한국정보과학회 2009 정보과학회논문지 : 정보통신 Vol.36 No.2
2008년에 Kim-Jun은 의도하지 않은 정보의 누출로 인한 악의적인 공격들 및 범죄 악용 문제점들을 해결하기 위해 일회성 난수를 이용한 RFID 상호인증 프로토콜을 제안하였다. 보안성 분석을 통하여 Kim-Jun은 제안한 프로토콜이 재전송 공격을 포함한 다양한 공격들에 안전함을 증명하였다. 하지만 본 논문에서는 그들의 주장과는 달리 그들이 제안한 프로토콜이 여전히 재전송 공격에 취약함을 증명하며, 더 나아가 동일한 연산 효율성을 보장하며 재전송 공격을 막을 수 있는 간단히 개선된 일회성 난수 기반의 RFID 상호인증 프로토콜을 제안한다. In 2008, Kim-Jun proposed a RFID mutual authentication protocol using one-time random number that can withstand malicious attacks by the leakage of important information and resolve the criminal abuse problems. Through the security analysis, they claimed that the proposed protocol can withstand various security attacks including the replay attack. However, this paper demonstrates that Kim-Jun's RFID authentication protocol still insecure to the replay attack. In addition, this paper also proposes a simply improved RFID mutual authentication protocol using one-time random number which not only provides same computational efficiency, but also withstands the replay attack.
Yoon,Myong-O,Park,Jin-Kook,Kim,Choong-Ik,Ryou,Hong-Sun,Kim,Jin-Gon,Kim,Myung-Bae,Choi,Jun-Seok,Kim,Kwang-Il 한국화재소방학회 1997 한국화재소방학회 학술대회 논문집 Vol.1997 No.-
Fire characteristics of a typical apartment building in Korea was studied through full scale experiment and zone model simulation. The fire was ignited at the living room and allowed to spread to other parts of a single unit in a five storied apartment building. Various data including temperatures, species concentrations, and images were collected in the experiment. A zone model(CFAST) was used to analyze the same apartment building that represents the average households in Korea. The results were compared with a full scale experiments. While CFAST allows one compartment involved with fire, the experiment allowed the fire to spread to other compartments. Therefore, the comparison between experimental data and Zone-Model data is valid until the living-room fire spread to other parts of the apartment. Flashover occurred at approximately 380 seconds in a fire experiment, and at approximately 420 seconds in Zone-Model. Based on all of data between experimental data and Zone-Model data, it is concluded that the safe escape time is about 250 seconds.
( Hyeok Jun Yoon1 ),( Young Hyun You ),( Ye Eun Kim ),( Young Ja Kim ),( Won Sik Kong ),( Jong Guk Kim ) 한국미생물 · 생명공학회 2013 Journal of microbiology and biotechnology Vol.23 No.8
The ectomycorrhizal fungus Tricholoma matsutake grows symbiotically with Pinus densiflora. Phenylalanine ammonia-lyase (E.C. 4.3.1.24) catalyzes the conversion of L-phenylalanine to trans-cinnamic acid. The role of fungal phenylalanine ammonia-lyase, however, has not been clear until now. In this study, the gene encoding phenylalanine ammonia-lyase (PAL), which was isolated from T. matsutake, was cloned and characterized. The PAL gene (tmpal) consists of 2,160 nucleotides, coding for a polypeptide containing 719 amino acid residues. The deduced amino acid sequence of tmpal from T. matsutake shows high identity (70%) with that from Laccaria bicolor. Comparative analysis of the PAL genes among T. matsutake and other species of the class Agaricomycetes showed that both active sites and binding sites were significantly conserved among these genes. The transcriptional analysis of the PAL gene revealed a differential gene expression pattern depending on the developmental stages (mycelium, primordium, stipe, pileus, and gills) of T. matsutake. These results suggest that the PAL gene in T. matsutake plays an important role in multiple physiological functions.
김윤신,윤병준,이준협,윤치근 한국보건통계학회 2003 보건정보통계학회지 Vol.28 No.1
Health indicator system and measurement of health status are an important fields in national health fields. In order to promote the national health level and measure health status, the national heath authority must rebuild the present health data and indicator production system. This study reviewed the overall concepts of health and health indicator, health indicator system. The scope of this study ; - Review of the conceptual health framework, health indicators, and health indicator system - Comparative analysis on the present health indicator system of developed countres and international organizations. This study suggested the new health indicator system corresponding the health state situation and national health components. The results of this study are appiled to the conceptual framework establishment of national health components, the development of national health policy a health status measurement tools. And the national health authority will apply the results of this study to the promotion of health indicator system and the demand of international organizations. Finally, although this study suggest the desirable health indicator system will be reduced in the functions and characteristics of health indicator and health indicator system.
S-344 : The Role of Skeletal Muscle Mass in Development of Metabolic Syndrome
( Byung Sam Park ),( Jun Sung Moon ),( Ji Sung Yoon ),( Kyu Chang Won ),( Hyoung Woo Lee ) 대한내과학회 2013 대한내과학회 추계학술대회 Vol.2013 No.1
Introduction: It has been well known that abdominal adiposity is related with insulin resistance and greater risk of metabolic disorder. Skeletal muscle plays central role in insulin mediated glucose disposal of whole body, but we only know a little about the association between skeletal muscle mass and MetS (MetS). The aim of this study is to clarify the clinical role of skeletal muscle mass in developing MetS through using skeletal muscle parameters by body impedance analysis (BIA). Methods: 1,042 healthy adults aged from 20 to 75 years who visited Yeungnam university health promotion center from Jun. 2008 to Jun. 2010 were enrolled. 204 subjects who had prior MetS or chronic disease that can affect to skeletal muscle mass were excluded. After 24 months from baseline, the metabolic parameters were assessed and the development of MetS was diagnosed using modified NCEP-ATP III criteria. From the BIA (Inbody 720), we obtained skeletal muscle mass (SMM, Kg), body fat mass (BFM, Kg), and visceral fat area (VFA, cm2). Then, we had defined as follows; percent of skeletal muscle mass (SMM%, %): SMM (kg)/weight (Kg), skeletal muscle index (SMI, Kg/m2): SMM (Kg)/height (m)2, skeletal muscle to body fat ratio (MFR): SMM (kg)/BFM (Kg) and skeletal muscle to visceral fat ratio (SVR, Kg/cm2): SMM (Kg)/VFA (cm2) Results: Mean follow up periods were 28.7±5.4 months. Among total 838 subjects (46.9±9.9 years, M:F=477:361), 88 (10.5%) were newly diagnosed MetS. 5th quintile of the SMM%, MFR and SVR was associated with decreased risk of development of MetS after adjusting for confounding factors. Conclusion: Decreased skeletal muscle mass may play critical role in development of the MetS and not absolute amount of skeletal muscle mass but relative ratio to body composition may be more important.
전진용,김상아,박웅섭,오미경,홍윤미 관동대학교 의과학연구소 2001 關東醫大學術誌 Vol.5 No.1
This study was conducted to understand health status by general characteristic, and to find out relationship between the general characteristics and rural elderly's health status. Health status was measured using SF-36(Medical Outcome Study Short From 36). The finding of this study were as follow; Mean scores of health status by sex were higher in male on physical function, social function and role limitation-emotion. The elderly educated more reported good health on physical function, role limitation-physical, vitality, bodily pain and general health than did the elderly educated less. The elderly who have disease reported bad health on social function, mental health and general health. Therefore we reviewed the evidence that sex, education and illness are associated with health status in the elderly, and that specific public health service that related such condition should be considered for the rural elderly.
윤준식 건국대학교 산업대학원 2001 論文集 Vol.13 No.-
To assess the comfortableness of climbing wear, this study investigated physiological responses and subjective senses by dividing the enveronmental condition into 2 types, climbing wear into 2 types and subjects into 2 groups. The indicators of physiological responses included clothing temperature by region of the body, average skin temperature, eardrum temperature, temperature and moisture whitin the clothing, the amount of sweating, heart rate, energy metabolism. The indicators of subjective senses included the sence of warmth, the sense of humidity and the sense of comfortableness. This study has the following limitations : First, only representative specimens were selected from diverse functional materials and general materials and tested. Care was taken not make an expansive interpretation of the study results. Second, climbing exercise has no special rules. Therefore, a little more diverse and extensive studies are needed in the future. Third, the state of the artificial climate room might considerably differ from the climate of the general mountainous terrain. Therefore, the laboratory researchmight be more or less different from the research under the actual environment. With these limitations in mind, the climbing wear of general materials and the climbing wear of functional materials were investigated by environmental condition and by group of subjects. As a consequence, the following findings were obtained : (1) Physiological Responses As for the skin temperature by region of the body, the skin temperature of the trunk was higher than that of the limbs. The average clothing temperature showed the temperature distribution of 31.08℃∼33.38℃ and higher than that of skin temperature. The higher temperature/moisture were, the higher this distribution of skin temperature was shown to be. The eardrum temperature was shown to be within the distribution of 36±1℃. It was found that there was not a great difference in int under the different environment because of the ability of the body to regulate its temperature. In the 'A' environment(18℃, 40%), it was found that there was a significant difference in temperature/moisture wihtin clothing between the types of climbing wear at the significance level of p <0.001. In the 'B' environment, it was found that there was not a statistically significant difference. This indicates that there was not a great difference between the climbing wear of general materials and the climbing wear of functional materials in the hot and humid environment. As for the amount of sweating by reginon of the body, the sweating amount of the trunk was higher than that of the limbs. The sweating amount of the chest and the back was shown to be highest. And the difference between the types of climbing wear showed the same tendency as the climate within climbing wear in both the 'A' environment and the 'B' environment. Therefore, they had the close relationship with each other. The higher the temperature/moisture of the environmental condition became, the higher blood pressure became. Depending on time, blood pressure tended to rise at a time of exercise and fall at a time of resting. The lowest blood pressure belonged to the normal domain, but the highest blood pressure was shown to be high at the range of 1㎜Hg∼10㎜Hg. (2) Subjective Senses It was found that there was not a difference in the sense of warmth between the climbing wear of general materials and the climbing wear of functional in both the 'A' environment(18℃, 40%) and the 'B' environment(25℃, 60%). There was a more or less difference in the sense of humidity and the sense of comfortableness in the 'A' environment condition. But it was found that there was not a difference between climbing wear of general materials and the climbing wear of functional materials in the 'B' environment(25℃, 60%). (3) The Study Results Depending on the Classification of Subjects It was found that there was a difference in the result of physiological reactions by item between the group of climbing specialists(P1) and the group of general people(P2), which indicates that physiological reactions are related to exercise ability at ordinary times. But, in case of the group of climbing specialists(P1), there was not a great difference in the figures of subjective senses between and the 'B' environmental condition. But in case of the group of general people, it was found that there was a more or less difference between the types of wear materials in each environmental condition. It was found that the group of general people was sensitive to changes in wear materials.
무세정 Wave Soldering 공정 기술에 관한 연구
윤준호,장인철,신영의 중앙대학교 기술과학연구소 1997 기술과학연구소 논문집 Vol.27 No.-
본 연구는 저잔사 무세정 플럭스를 사용한 솔더링 공정에 대한 실험을 수행하였다. 일반적으로 세정이 요구되는 플럭스와 같은 조건에서 실험할 후 비교하여 육안 검사와 인장 시험을 통해 저잔사 플럭스의 특성과 문제점 그에 따른 최적 조건을 검토하였다. 실험한 결과로부터 기존의 플럭스와 저잔사 무세정 플럭스의 결함 발생 조건을 검토하였고, 시편이 접합력 측정하여 품질을 평가하였다. 접합력에 있어서는 저잔사 무세정 플럭스가 기존 플럭스보다 약 10~20N 정도로 높게 나타났지만, 변동폭도 크게 나타나 접합의 재현성면에서 문제가 있는 것으로 생각되며, 솔더링 공정 상 (특히 예열온도, 예열 시간, 납조 접촉 시간)의 보다 세심한 주의를 요하는 것으로 사려된다. Wave soldering with low residue, non-cleaning flux has been studied from perspective initial solderability using visual inspection and mechanical tensile test. Soldering fillet including joining force with non-cleaning flux and cleaning flux were compared in wave soldering process. As a result of visual inspection, for low residue non-cleaning flux, optimal conveyor speed was 1.0~2.0 m/min and optimal preheat temperature was 50~125℃. For cleaning type flux, optimal conditions were 0.6~1.0 m/min, 110~125℃. As result of tensile test, initial tensile force of non-cleaning flux is lower than cleaning flux. It is recommenced to use non-cleaning flux for demanding higher strength and to use cleaning flux for demanding on repeatability. The influences of filling the holes on tensile force are also explored. To inspect that holes was filled with solder are more important than the lower- side fillet deformed well in PTH(PIH)devices.
프로젝트 초기 단계에서의 분쟁방지를 위한 분쟁요인 추출에 관한 연구 : 턴키공사 사례 중심으로 Focusing on Turn-Key Project
윤준선,권기범,서춘택,백준홍 韓國仲裁學會 2004 중재연구 Vol.14 No.1
Although we try to increase the order of turn key construction for the international competitiveness strengthening, the construction quality advancement and the productivity enhancement of the public sectors, the problems of the domestic turn key systems are causing the hardships of all the participants and many possible disputes. The home turn key constructions have been activated since 1997. A lot of trial and error had been experienced in these days, and the turn key systems have been changed little by little. But the bases are continuously kept because of their reflecting all the participants' opinions. In the inner turn key constructions the problems of uniform types are repeatedly occurred, and, especially, many problems happen up to the stage of early stage owing to the specialties of the turn key construction. So the dispute factors of the Korean turn key constructions were abstracted through the literature searches, the site document examinations, the case studies and the interviews with the experts. When the technicians meeting the interior turn key construction for the first time and working here now are well acquainted with only these factors, many disputes will be prevented.