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.

ANALYSIS OF FIRE CHARACTERISTICS IN APARTMENT BUILDING THROUGH FULL SCALE EXPERIMENT AND ZONE MODEL SIMULATION

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.

각국의 보건지표체계에 대한 비교 고찰

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.

Cloning and mRNA Expression Analysis of the Gene Encoding Phenylalanine Ammonia-Lyase of the Ectomycorrhizal Fungus Tricholoma matsutake

( 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.

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.

번호이동성제도 시행 이후의 소비자 행동에 관한 실증분석

윤충한,정준호 한국정보사회진흥원 2006 정보화정책 Vol.13 No.2

우리나라 이동전화시장의 공정한 경쟁을 위해 도입된 번호이동성 제도는 제도 시행이후 시장에 여러 가지 긍정적인 변화를 가져온 것으로 판단된다. 제도 시행이후 가입전환은 증가하였으며, 시장점유율의 차이는 줄어들고 허핀달지수는 지속적으로 내려가고 있는 등 시장구조에 상당한 변화가 일어나 이동전화시장이 더 경쟁적인 상태로 변화하고 있음을 보여 준다. 본 연구는 집계변수 측면에서 확인되는 이러한 이동전화시장의 변화가 번호이동성으로 소비자들의 선택이 더욱 용이해지고 가입전환에 드는 비용이 줄어들어서 발생하는 현상인지를 직접적으로 확인하기 위해 소비자선택모형을 이용하여 시장의 번호이동성제도의 효과를 실증적으로 분석하였다는 점에서 의의가 있다. 관측되는 가입전환의 증가 현상이 실제로 번호변경에 따르는 비용으로 오랫동안 가입전환을 하지 못했던 소비자들이 대거 번호이동하였기 때문에 나타났다는 본 연구의 실증분석 결과는 전환비용과 번호이동제의 효과 분석에 많은 시사점을 준다.

6K21-T4 알루미늄 합금 레이저 용접부의 기계적 성질에 미치는 필러 와이어의 영향

윤종원,강준일 동의대학교 산업기술개발연구소 2006 産業技術硏究誌 Vol.20 No.-

6xxx(Al-Mg-Si) alloy is candidate material for eco-friendly car (lightweight car body structure and panels) due to their good combination of strength and formability. 6K21 aluminum alloy sheet of 1㎜ and 2㎜ thickness were TB(tailored blank) welded using continuous wave Nd:YAG laser with and without 4043 filler wire. The effect of filler wire on the weldability of 6K21 alloy was investigated. The weld metal composition was changed by feeding the 4043 filler wire containing 5wt.% Si. Solidification cracking in the weld metal was substantially reduced when the filler wire was used. Tensile strength and formability of the welds were improved compared to those of welds made without filler wires. It was revealed by EPMA analysis and image mapping that the abundant amount of Al-Si eutectic existed particularly at the interdendritic sites or grain boundaries and thus the eutectic prevented the solidification cracking in the weld metal.

주관적 건강상태에 영향을 미치는 관련요인 분석

윤병준 서울保健大學 1998 論文集 Vol.18 No.1

This study was carried out to analyze the relationship self-evaluated health status, usual health status evaluated by a member of household with social-demographic levels and health related behaviors. I obtained the health consciousness and behavior survey data which Korea Institute for Health and Social Affairs conducted national-wide interview in 1995. The sample consisted of 5,330 persons aged 20~69. I select following independent variables residence, sex, age, educational level, marital status, standard of living among social-demographic variables and smoking, drinking, physical exercise, adequate sleeping, regular meals among health behavior variables and I select self-evaluated health status, usual health status as the dependent variables. The results were as follow 1. Self-evaluated health status was significantly associated with residence, sex, age, educational level, marital status, standard of living respectively(p<0.001). 2. Self-evaluated health status was significantly associated with smoking, drinking, physical exercise, regular meals, adequate sleeping respectively(p<0.001). 3. Self-evaluated health status was highly correlated with usual health status evaluated by a member of household (r=0.6916). 4. The result of multivariate analysis of variance was that physical exercise and adequate sleeping had an effect on self-evaluated health status significantly(p<0.001). 5. The health behaviors explained 0.5 percent of self-evaluated health status variance, but covariate variables of age, educational level, sex, standard of living, residence explained 11.2 percent of total variance.

유도선수의 체급별 득점빈도 비교 분석

전윤수,김도형 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.5

This study has been performed by analysing the scoring frequency of technical styles of male and female Judo players between weight groups compared to the scoring frequency of technical styles of male and female Judo players in each weight group participated in the 29th Chairman Cup National Judo Tournament (251 men players and 146 women players: Total: 397). The results was analyzed using the SPSS/win statistic program. 1. Analysis result of scoring frequency in each weight group: First, man -60kg weight players scored in an order of Hyokwa, Yuhyo, Jeolban and Hanpan and woman -48kg weight players scored in an order of Hyokwa, Hanpan, Yuhyo, and Jeolban. Second, man -66kg weight players scored in an order of Hyokwa, Yuhyo, Hanpan and Jeolban and woman -52kg weight players scored in an order of Yuhyo, Hyokwa, Hanpan, and Jeolban. Third, man -73kg weight players scored in an order of Hyokwa, Hanpan, Jeolban and Yuhyo and woman -57kg weight players scored in an order of Hyokwa, Hanpan, Yuhyo, and Jeolban. Fourth, man -81kg weight players scored in an order of Hyokwa, Hanpan, Jeolban and Yuhyo and woman -63kg weight players scored in an order of Hanpan, Hyokwa, Jeolban and Yuhyo. Fifth, man -90kg weight players scored in an order of Hyokwa, Yuhyo, Hanpan and Jeolban and woman -70kg weight players scored in an order of Hyokwa, Jeolban, Hanpan, and Yuhyo. Sixth, man -100kg weight players scored in an order of Yuhyo, Hyokwa, Jeolban and Hanpan and woman -78kg weight players scored in an order of Yuhy, Jolban, Hyokwa, and Hanpan. Seventh, man +100kg weight players scored in an order of Hyokwa, Hanpan, Yuhyo, and Jeolban and woman +78kg weight players scored in an order of

등산복 쾌적성에 대한 연구

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.