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.

黃芩 抽出物이 DNCB로 誘導된 생쥐의 Allergy性 接觸皮膚炎에 미치는 影響

全宰弘,姜允皓 동국대학교 한의학연구소 1998 東國韓醫學硏究所論文集 Vol.7 No.1

본 실험은 황금이 Allergy性 접촉피부염의 면역과민반응 및 염증반응에 미치는 영향을 조사하기 위해서 시행되었다. 실험을 위해 BALB/C계 생쥐를 DNCB 처리군과 DNCB 처리 후 황금추출액을 경구 투여한 황금추출물투여군(HGET군)으로 나누어 2,4-dinitrochlorobenzene(DNCB)를 도포하여 Allergy性 접촉피부염을 유발한 뒤, 시간의 경과에 따라 contact hypersensitivity assay, 피부의 일반적인 구조 혈관생성, 림프구를 비롯한 염증세포, sulfated acid mucosubstance, 비만세포, IL-2 R, ICAM-1 그리고 CD11b의 변화를 관찰하였다. Contact hypersensitivity assay에서 HEGT군은 DNCB처리군에 비해 有意性있는 ear swelling의 감소를 보였다. 피부표피의 변화에서 HEGT군에서 DNCB처리군에 비해 감소된 것으로 나타났다. 또한 혈관생성, 림프구의 침투 및 표피 기저층과 가시층 세포치 손상은 HEGT군에서 DNCB처리군에 비해 감소된 것으로 나타났다. 또한 혈관생성, 림프구를 비롯한 염증세포, sulfated acid mucosubstance와 비만세포, IL-2 R 양성반응세포, ICAM-1 양성반응세포 그리고 CD11b 양성반응은 Allergy性 접촉피부염의 면역과민반응억제와 항염증작용에 효과가 있는 것으로 사료된다. This study was performed to investigated the effects of an immunosuppression and a mitigation of inflammation of Scutellaria baicalensis GEORGI on Allergic contact dermatitis. In order to study, after oral administration of Scutellaria baicalensis GEORGI extract, contact hypersensitivity assay, general morphologic change of skin, suIfated acid mucosubstance, mast cell, lL-2R, ICAM-1 and CD11b were observed in BALB/C mouse induced allergic contact dermatitis by the contact sensitizing DNCB. Ear swelling in contact hypersensitivity assay was decreased in the Scutellaria baicalensis GEORGI extracts administered(HEGT) group, compared with DNCB painted group. In the general morphologic change of skin, hyperplasia of keratinocytes, increase of lymphocytes and inflammatory cell, increase of vasculogenesis and epidermal lymphocytes infiltration, increase of cell damage in epidermal basal layer and prickle layer were decreased in the HEGT group, compared with DNCB painted group. Increase of sulfated acid mucosubstance, mast cell, lL-2R positive cell, ICAM-1 positive cell, CD11b positive cell were decreased in the HEGT group, compared with DNCB painted group.

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.

지방화시대의 지역사회운동의 역할과 과제

윤준상,김동섭 公州大學校 産業開發硏究所 1999 産業開發硏究 Vol.7 No.-

After 1960's, the urbanization and industriaization have been nation=leading in Korea. Also, the policy process oriented only the public good as a result nuder the authoritarian government, ommiting democratic proccess without taking public opinion into consideration. As result of these, each community's specific circumstance was not reflected in regional development and brought forward various social problems such as income and development disparity etc. However, operation of local autonomy, gradual realization of democracy and enlargement of demand on bottom-up made a community movements quantitatively and qualitatively. Community movements have played a very essential role as the major means of protest in such problems of community people concerned. Especially, in the cases of underprivileged social strata and area, community movement is an important means in the formation of political opinion and policy making processes to the their local government. Community movement should be based on the community people's needs. Community movement organizations should be made programs solving people's needs is to be established in local government level. So, the desirable directions for the development of community movement in community level are as follows: ① the settlement of Local Agenda, ② the development of community common sense, ③ the activation and solidarity of community movement organizations, ④ the development of community leadership, ⑤ the activation of local press and regional informatization, ⑥ the support of local government to the community movement organizations.

친환경 농업기술로서의 규소의 잠재적 효용성

윤영만,장준영,김정규 고려대학교 자연자원연구소 2000 自然資源科學硏究 Vol.8 No.-

韓國人의 平均有配偶餘命에 關한 硏究

윤병준 한국인구학회 1988 한국인구학 Vol.11 No.2

This study was conducted in order to compare the sequential changes of marital partnership and average marital life expectancy in Korea using Korean marriage life table for 1970. 1980. and 1985. The marriage life table was constructed by the Wolfbein-Wool method of constructing a working life table. Data used in this study was obtained from the Population Census Reports of Korea and the Korean Abridged life Tables. Some of the finding may be summarized as follows: 1. The marital partnership findings showed that males in the 40-44 age group in 1970 and in 1980 and those in the 45-49 bracket in 1985 have the highest rates of any other age interval, the percentages were 97.5%, 97.3% and 96.9%, respectively. The highest marital partnership rates for females were those aged 30-34 in 1970 and in 1980 and 35-39 in 1985:these were 94.6%. 94.3% and 93.3% respectively. 2. The marital rate of the youngest age group has decreased due to the increasing amount of people marrying at older ages. On the other hand. the marital rates of the elderly has increased slightly due to the decreasing mortality rate. 3. The enterance rate of marriage at the 15-19 female age group ad the 20-24 male age group has decreased. 4. The secession rate of marriage has gradually decreased due to the decrease in the mortality rate. The main reason of secession for males is his own death. For females, the main reasons are divorce and the death of her spouse. 5. Korean average marital life expectancy has improved in general. In 1985 the average marital life expectancy for males was higher by 4-5 years than for females. The average difference of marital expectancy and life expectancy is about 1.4-1.5 years for males and about 11-14 years at the age groups below 60 years for females.