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성연국,김현철,정진욱,김순철,류원 한국융합보안학회 2002 융합보안 논문지 Vol.2 No.2
무선 인터넷에 대한 수요가 날로 증가하고 있는 가운데 무선 인터넷이 보다 활성화되기 위해서는 반드시 해결해야 될 문제가 있는데, 보안 문제가 바로 그것이다. 특히 음성 위주의 이동통신에서는 도청만이 문제가 되었지만 증권이나 뱅킹같이 단순한 정보 서비스를 뛰어넘는 상거래 활동이 이루어지는 데이터 서비스에서는 사용자 인증, 데이터 무결성 보장 등 해결해야 할 문제가 많다. 이에 무선 인터넷 환경에서 안전한 서비스를 제공하기 위해 유선 인터넷 환경에서와 같은 보안 서비스를 제공할 수 있는 무선 PH(WPKI: Wireless Public Key Infrastructure)의 필요성이 대두되었다. 즉, 유선 인터넷 환경에서 제공되는 기밀성, 무결성, 부인봉쇄 등의 보안 서비스를 무선 인터넷 환경에서도 제공하기 위해서는, 먼저 무선 PKI가 구축되고 서비스가 활성화되어야 할 것이다. 본 논문에서는 안전한 무선 인터넷 서비스를 위한 다양한 무선 인터넷 기술들과 그에 사용되는 무선 PKI기술 그리고 이에 적용 가능한 무선 PKI 표준들에 대해 분석하였다. 본 논문의 수행 결과로는 안전한 무선 PKI 서비스의 활성화와 더불어 무선 인터넷 뱅킹 서비스, 주식 거래, 온라인 쇼핑 등 무선 인터넷을 이용한 전자 상거래의 활성화에 기여할 것으로 기대된다. Everyday demand of wireless internet is increasing. Security problem is certainly resolved for wireless internet activation. Especially problem is only wiretap in mobile communication with voice, but problems, user authentication, data integrity guarantee etc., are resolved in data-services that have commercial transaction over simple data information service such bill, banking. Necessity of wireless PKI that can offer security service likely in wired environment is requested for offering security service in wireless environment. For offering security services, confidentiality, integrity, non-repudiation etc, that of offered in wired environment in wireless environment, first it must construct wireless PKI infrastructure and do service activity. This paper analyze various wireless internet technology for offering safe wireless internet service and wireless PH standards. Performance Result of this paper expect activity of safe wireless PH service and activity of electronic commercial transaction used wireless internet such banking service, bill transaction, online shopping.
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Multichannel Type 분광방사측정 시스템의 제작 및 응용에 관한 연구
성연국,백운식 한국조명전기설비학회 1996 조명.전기설비 Vol.10 No.2
본 연구에서는 광학계를 설계하고 이미지 센서를 사용하여 자외선 영역에서 근적외선(220nm~1100nm)의 광학적 특성평가를 측정시간 16ms에서 20000ms 범위에서 검지할 수 있도록 하는 시스템을 제작하고 본 시스템의 응용연구를 통해 조명산업 및 표시소자 산업의 연구개발 및 품질관리 평가에 필요한 칼라의 색좌표, 연색성, 휘도, 색차, 색순도, 반사율, 투과율 등을 측정하였다. A multichannel type spectroradiometer which can measure the optical characteristics of light sources was constructed. Our system can be used to measure the optical characteristics of light sources of which the wavelengths are ranging from ultraviolet to infrared(220nm~1100nm)in 16msec. The optical characteristics such as color coordinates, color rendering index, brightness, color difference, etc. was measured and analyzed.
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손승진,성연국,정경은 대한건선학회 2022 대한건선학회지 Vol.19 No.2
Psoriasis is a chronic inflammatory skin disease. Metabolic syndrome and cardiovascular disease, such as hypertension, stroke, diabetes mellitus, and hyperlipidemia, are more frequent among psoriatic patients and they experience increased morbidity and mortality than the normal population. Therefore, psoriasis and its comorbidities are important issues, especially in the geriatric population. However, little is known about psoriasis in geriatric patients, whereas treating this growing population can be challenging due to comorbidities, polypharmacy and physical impairments. Also, it will be of increasing importance to focus on the holistic management of geriatric dermatological conditions as this approach is potentially more cost effective because treatment is individualized and takes into account the patient’s overall medical and social circumstances. Treatment goals should be kept simple and individualized for each patient, based on concomitant comorbidities, potential adverse effects, existing quality of life, self-care capability, drug history, care-giver situation, financial needs, feasibility for follow- up and patient’s preferences. Here, we review the characteristics of geriatric patients with psoriasis and discuss rational treatment strategies.
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PMF 수용모델을 이용한 평택 지역 PM<SUB>10</SUB>의 오염원 기여율 평가
허종원(Jongwon Heo),김찬혁(Chanhyuk Kim),민윤기(Yoonki Min),김현자(Hyeonja Kim),성연국(Yeongook Sung),김종수(Jongsoo Kim),이경빈(Kyoungbin Lee),허종배(Jongbae Heo) 한국대기환경학회 2018 한국대기환경학회지 Vol.34 No.6
In order to identify the PM<SUB>10</SUB> pollutant sources, positive matrix factorization (PMF) was applied to the chemical composition data of ambient PM<SUB>10</SUB> samples that were collected at Pyeongtaek in Gyeonggi-do every fifth day from January 2015 to December 2016. Carbon species (organic and elemental carbon), ionic matter, and trace elements of PM<SUB>10</SUB> were analyzed and the results were included in the PMF model. Nine PM<SUB>10</SUB> sources were identified and apportioned by using important individual indicators of chemical species on each of the resolved source profiles from the PMF modeling. The identified nine sources were secondary sulfate (19.4%), secondary nitrate (18.7%), biomass burning (17.6%), soil (12%), sea salt (9.3%), industry (7.6%), diesel emission (6.3%), gasoline emission (5.7%), and incineration (3.3%). Also, the results of conditional probability function (CPF) showed that PM<SUB>10</SUB> levels were influenced by local-sources such as industry, incineration and soil. The results of this study will provide the fundamental information to help regularize the PM<SUB>10</SUB> control strategies for improvement the air quality in the study region.
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연구논문 : 생활계 오염원의 유기물 및 암모니아성 질소 배출특성 평가
한송희 ( Song Hee Han ),김요용 ( Yo Yong Kim ),성연국 ( Yeon Gook Sung ),박익범 ( Ik Beom Park ),조덕희 ( Deok Hee Cho ),남우경 ( Woo Kyung Nam ),김창규 ( Chang Gyu Kim ),오조교 ( Jo Kyo Oh ) 한국물환경학회(구 한국수질보전학회) 2015 한국물환경학회지 Vol.31 No.4
The purpose of this research was to suggest the water quality improvement in streams by evaluating the distribution characteristics of organics and ammonia nitrogen discharged by pollution sources from human living. The public sewage treatment plants’(PSTPs) effluents and the waters from streams in Gyeonggi-do were sampled and analyzed. Nitrogenous oxygen demand (NOD) was measured for the stream waters as well as the PSTPs effluents, and the correlations of NOD and NH3-N, NH3-N and water temperature in the PSTPs effluents were confirmed. In the case of the stream waters, the ratios of NOD to BOD and NH3-N increased in the downstream sites after discharging the PSTPs effluents. As a result of statistical analysis of NH3-N concentrations for the national water quality monitoring streams in Gyeonggi-do, NH3-N showed the non-normal distribution which were biased to the left, but showed the considerable level because of higher coefficient of variation. Therefore, it is required to establish the water quality standard for the NH3-N as a new parameter for judging the quality of the streams. In addition, inducing complete nitrification and introducing a logical standard setting system are needed to improve the water quality of streams by identifying distribution of the nitrogen components from PSTPs effluents.
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