Homomorphic Encryptions at a Long Distance Through Quantum Key Distribution Protocols

JEONG*, Kabgyun,KIM, Yong Jin,YOON, Jong Beom,KIM, Geon Woo,CHO, Gueha,KIM, Suntaek Korean Physical Society 2019 새물리 Vol.69 No.2

한국인 직무 스트레스 측정도구의 개발 및 표준화

장세진,고상백,강동묵,김성아,강명근,이철갑,정진주,조정진,손미아,채창호,김정원,김정일,김형수,노상철,박재범,우종민,김수영,김정연,하미나,박정선,이경용,김형렬,공정옥,김인아,김정수,박준호,현숙정,손동국 大韓産業醫學會 2005 대한직업환경의학회지 Vol.17 No.4

Background and Purposes: Over the past three decades, numerous studies performed in Korea have reported that job stress is a determinant risk factor for chronic diseases and work disability. Every society has its own culture and occupational climate particular to their organizations, and hence experiences different occupational stress. An occupational stress measurement tool therefore needs to be developed to estimate it objectively. The purpose of this study is to develop and standardize the Korean Occupational Stress Scale (KOSS) which is considered to be unique and specific occupational stressors in Korean employees. Subjects and Methods: Data were obtained from the National Study for Development and Standardization of Occupational Stress (NSDSOS Project: 2002-2004). A total of 12,631 employees from a nationwide sample proportional to the Korean Standard Industrial Classification and the Korean Standard Occupational Classification were administered. The KOSS was developed for 2 years (2002-2004). In the first year, we collected 255 items from the most popular job stress measurement tools such as JCQ, ERI, NIOSH and OSI, and 44 items derived from the a qualitative study (depth interview). Forty-three items of KOSS, in the second year, were retained for use in the final version of the KOSS by using Delphi and factor analysis. Items were scored using conventional 1-2-3-4 Likert scores for the response categories. Results: We developed eight subscales by using factor analysis and validation process: physical environment (3 items), job demand (8 items), insufficient job control (5 items), interpersonal conflict (4 items), job insecurity (6 items), organizational system (7 items), lack of reward (6 items), and occupational climate (4 items). Together they explained 50.0% of total variance. Internal consistency alpha scores were ranged from 0.51 to 0.82. Twenty-four items of the short form of the KOSS (KOSS-SF) were also developed to estimate job stress in the work setting. Because the levels of the subscales of occupational stress were gender dependent, gender-specific standard norms for both the 43-item full version and the 24-item short form using a quartile for the subscales of KOSS were presented. Conclusion: The results of this study suggest that KOSS might be an appropriate measurement scale to estimate occupational stress of Korean employees. Further and more detailed study needs to be conducted to improve the validity of this scale.

타이밍 오류 검출회로의 설계

정한철,곽철호,김정범 강원대학교 정보통신연구소 2002 정보통신논문지 Vol.6 No.-

Error control is one of major concerns in many computer systems. Experience shows that most malfunctions during system operation are caused by transient faults, which often mean abnormal signal delays that may result in violations of circuit element timing constraints. This paper presents a novel CMOS-based concurrent timing error detector that makes a flip-flop (or other timing-sensitive circuit element) to sense and then signal whether its data has been potentially corrupted or not by a setup or hold timing violation. Designed circuit performs a quiescent supply current evaluation to determine timing violation from the input changes in relation to a clock edge. If the input is too close to the clock time, the resulting switching transient current in the detection circuit exceeds a reference threshold at the instant of the clock transition and an error is flagged. The simulation results in this paper shows that designed circuit can be used to detect setup and hold time violations effectively in clocked circuit element.

PFA / Silica 유-무기 복합체의 제조 및 표면특성

범정철,하종욱,박인준,이수복 한국공업화학회 2003 응용화학 Vol.7 No.1

Poly(perfluoroalkyl acrylate)(PFA) / silica composites having different silica size were prepared by surface polymerization. In this study, surface characterizations of PFA/silica composites were done by HR-TEM(High Resolution Transmission Microscopy), contact angle measurement, sliding angle measurement, surface roughness measurement, and the relationships between the sliding angle and the contact angle were investigated. In the highly hydrophobic region, the sliding angles of water droplets decreased with increasing contact angle. Their surface free energies were calculated with contact angle data by geometric mean approximation. The composites with super water repellent and sliding could be obtained with contact angle of above 150。and sliding angle of below 10。to water droplets. The ultimate value of surface free energies of the composites reached below ca. ldyn/cm.

질병의 활동도 지표로써 머리카락 중 미량의 구리와 아연의 분석

정한성,최범석 慶熙大學校 材料科學技術硏究所 1997 材料科學技術硏究論集 Vol.10 No.-

The copper and zinc in scalp hair are determined by the ICP-AES and the relations between the trace elements concentrations with disease activity for the rheumatoid arthritis are investigated. The concentrations of the metals are varied depending upon the distance from the skin. The concentrations at the distal are higher than that of the proximal. Zinc concentration of the rheumatoid arthritis patients is higher than that of the osteroarthritis ones, and the confidence level that the group are different lies 95-99%. However, copper concentration for rheumatoid arthritis patients is lower and the two groups are different with a 50-80% confidence level.

CITIS 지원 기술정보관리 시스템의 설계

정석찬,한태창,서범수,조장혁,주경준 한국경영과학회 1998 한국경영과학회 학술대회논문집 Vol.- No.1

CITIS(Contractor Integrated Technical Information Service) is a contractor's developed service to provide electronic access and/or delivery of contractually required information. CITIS satisfies one of the major CALS objectives to furnish a single-entry point for authorized access to contractor-generated Contract Data Requirement List(CDRL) data. A critical requirement for the practical implementation of the CITIS concept is the ability to access multiple existing heterogeneous databases in a fashion transparent to the CITIS user. In this paper, we will propose a prototype system model for CITIS, and discuss the system architecture of proposed CITIS system as a global information management system for distributed and heterogeneous local information systems. Furthermore, we will discuss about the required server module and using-scenario of proposed CITIS system.

Lagomorpha (토끼)의 열생물학적 분류와 특성

이정범,민영기,양훈모 순천향대학교 교수학습개발센터 2004 Journal of Soonchunhyang Medical Science Vol.10 No.3

고산지대 또는 추운 지역에서 서식하는 Pika는 높은 고도에 의한 추위에 적응되어 있다. 저 호흡, 작은 귀이개와 열이 없는 타액의 분비와 행동의 특성에 의한 고 체온, 높은 대사량과 열을 적게 잃는 능력을 가진 Pika는 땅 밑의 토굴 또는 바위 사이의 은신처에 겨우내 먹을 수 잇는 저장된 먹이와 풀이 있는 곳에서 겨울을 난다고 보고 되어져 있다. 혈액 glucose 수준은 Pika (83±5.3 mg/ml)와 rabbit 90±8.2 mg/ml)에 비하여 Rat (120±15.5 mg/ml)이 높게 나타났다. 이는 통게적으로 유의한 차이가 인정되었다. (P<0.01). 또한 Pika와 Rabbit에 있어서는 통게적으로 유의한 차이가 인정되지 않았다. Pika는 생태학적으로나 자율 행동성 체온 조절학적인 것뿐만 아니라 추위에 대한 단열적인 방어 기전에 적응한 것으로 생각된다. 앞으로의 연구들에서 밝혀지겠지만 Pika의 연속적인 체온 주기의 소실은 주기 연구 영역에서 상당히 특이하고 흥미로운 것이다.

유산소 체계의 훈련이 아세티콜린에 대한 말초 발한 감도에 미치는 영향

이정범,민영기,양훈모 순천향대학교 교수학습개발센터 2004 Journal of Soonchunhyang Medical Science Vol.10 No.3

Higher sweating in trained, compared to sedentary men has been attributed to differences in the peripheral sweating mechanisms, although such mechanisms have not been completely investigated in comparative terms. The aim of this study is to quantitatively investingate the peripheral sudomotor adaptive mechanisms attributed for greater sweating in endurance-trained athletes as opposed to sedentary men. To do this, we compared sudomotor activities to acetylcholin (ACh) iontophoresed in the fore arm skins of trained versus untrained subjects. Changes in sking and body temperatures, sweating rate (sweat volume), sweat onset time, active sweat gland density (SGD), and single sweat gland output (SGO) were measured. Training-related differences were observed for sweat volume, onset-time, SGD, SGO and skin temperature. It was concluded that endurance trained atholetes had higher sweat outputs due to the combinations of a higher sweat output per activated sweat gland, shorter lag phase for sweating, higher number of activated sweat glands.

양극성장애와 새로운 항경련제의 효과

남범우,서정석,정헌종,최진영 건국대학교 의과학연구소 2004 건국의과학학술지 Vol.13 No.-

Bipolar disorder, like epilepsy and migraine, is episodic in nature and psychiatric illness requiring lifelong treatment. So, it should not be surprising that anticonvulsants such as carbamazepine and valproate have proven efficacy as mood stabilizers. The newer anticonvulsants such as lamotrigine, gabapentin, topiramate, oxcarbazepine, tiagabine, and zonisamide may also be effective treatments for bipolar disorder. Identifying an anticonvulsant for use in bipolar disorder should take into account not only the pathophysiology of bipolar disorder but also the mechanism of action of the anticonvulsant. Evidence for effectiveness of these novel antiepileptic drugs in treating acute mania and depression as well as in preventing the recurrence of mania and depression is reviewed. In conclusion, although the novel anticonvulsants appear to be clinically useful, more controlled trials are needed to assess the effectiveness in bipolar disorder.

한강수계 유입지천의 오염부하량 산정

서정범 안양대학교 산업기술연구소 1998 自然科學硏究 Vol.5 No.2

북한강의 의암댐과 팔당댐 사이 및 남한강의 충주댐과 팔당댐 사이의 102개 지천의 유량과 수질을 조사하고 오염부하량을 산정하였다. 유량이 가장 많은 제1 지천은 달천이었으며, 진암천, 소양천, 중리천, 양근천 등 도시지역을 통과하는 제2 지천은 BOD 농도가 높았다. 제1 지천중 BOD와 TN 농도가 가장 높은 지천은 경안천으로서 각각 8.5mg/L 및 7.94mg/L였으며, BOD부하량이 가장 높은 지천은 경안천으로서 2,057Kg/day였고, TN 및 TP의 부하량이 가장 높은 지천은 달천으로서 각각 6,956Kg/day 및 1,245Kg/day로 나타났다. This study was focused on survey of flow rate and pollutant concentration and on estimation of pollutant load for the 102 branch streams of Han-river. The results of the survey showed that flow rate of Dal-stream was particulary high among the first branch streams. Second branch streams passed through city or town as Jinam stream, Soyang stream, Joongri stream, Yangkeun stream showed high BOD concentration. Kyungan stream among the first branch streams was surveyed to highest BOD and TN concentration as 8.5mg/L and 7.94mg/L, respectively. Kyungan stream was showed the highest BOD load as 2,057Kg/day and Dal stream was showed the highest TN and TP load as 6,956Kg/day and 1,245Kg/day, respectively.