네트워크 수집정보를 이용한 정보보호 위험도 예측지수 개발

박진우,윤석훈,김진흠,정형철,Park, Jin Woo,Yun, Seokhoon,Kim, Jinheum,Jeong, Hyeong Chul 한국통계학회 2016 응용통계연구 Vol.29 No.7

본 연구에서는 네트워크 가입자들로부터 수집된 악성코드 감염 정보에 기초하여 악성코드 감염에 대한 위험정도를 파악할 수 있는 지수 산출 문제를 다루었다. 계층적 의사결정 방법을 사용하여 여러 악성코드들의 상대적 위험 가중치를 제안하였으며, 이들 가중치를 결합하여 위험도 지수를 산출하였다. 개발된 위험도지수에 대한 시계열 분석 및 통계적 모형 적합을 시도하였으며, 관리도를 통해 정보보호 위험을 예보할 수 있는 지수의 활용성을 살펴보았다. In this paper, we proposed an information security risk index to diagnose users' malware infection situations (such as computer virus and adware) by gathering data from KT network systems. To develop the information security risk index, we used the analytic hierarchy process methodology and estimated the risk weights of malware code types using the judgments of experts. The control chart could be used effectively to forecast the information security risk for the proposed information security risk index data.

PDGF-BB 적용시간이 decalcified dentin에서의 치은섬유아세포의 증식에 대한 효과

박진우,이재목,서조영,Park, Jin-Woo,Lee, Jae-Mok,Sun, Jo-Young 대한치주과학회 1996 Journal of Periodontal & Implant Science Vol.26 No.4

Platelet-derived growth factor(PDGF) is one of the polypeptide growth fators. PDGF has been reported as a biological mediator which regulates activities of wound healing process including the cell proliferation, migration and metabolism. Recent studies indicated that demineralized root surface as the primary site for growth factor application has advantages over other application method, especially due to binding capacity of growth factor for exposed matrix component of deminera1ized dentin surface. The purpose of this study is to evaluate optimal application time of PDGF-BB on proliferation of human gingival fibroblasts using deminera1ized dentin surface as primary application site. Human gingival fibroblasts and dentin slabs were prepared from the first premolar tooth extracted for the orthodontic treatment, cells were cultured in DMEM/I0% FBS at the $37^{\circ}C$, 5% CO2 incubator. All of the dentin slabs were preconditioned with Tetracycline HCI(100mg/ml) solution and rinsed in PBS. In the cell proliferation experiment, experimental group was immersed in DMEM containing 10% FBS, 50ng/rnl PDGF-BB during different time(30sec, 1, 2, 4, 8 minutes) and dried. Cells at concentration of $1{\times}10^5$cells/ml were seeded in each culture well which contained dentin slabs and incubated for 6 hours. Then, all of the dentin slabs were moved into new 24 well culture dish and incubated for 24, 48, 72 hours. The cell counting was done by hemocytometer with inverted phase contrast microscope after trypsinization. The results were as follows : The application of PDGF-BB for 1, 2 min slightly increased the number of gingival fibroblasts, and the application of PDGF-BB for 4, 8 min prominently increased the number of gingival fibroblasts. The application of PDGF-BB for 4 min showed maximum proliferation rate of gingival fibroblasts at 24, 48, 72 hours, and the application of PDGF-BB for 8 min showed less proliferation rate of gingival fibroblasts compared to the application of PDGF-BB for 4 min at 24, 48, 72 hours. In conclusion, the application of PDGF-BB for 4 min appeared to be optimal to obtain maximum proliferation of gingival fibroblasts using demineralized dentin surface as primary applicaton site of PDGF-BB.

Electron Impact Induced Ring Closure Reaction in Nornicotine

박진우,Jeen Woo Park Korean Chemical Society 1982 대한화학회지 Vol.26 No.5

톳(Hizikia fusiforme)과 모자판(Sargassum fulvellum) 에탄올 및 물 추출물의 아질산염 소거작용

박진우,이문조,윤현민,김철호,Park, Jin-Woo,Lee, Moon-Jo,Yoon, Hyun-Min,Kim, Cheorl-Ho 한국생명과학회 2001 생명과학회지 Vol.11 No.4

The purpose of this study was to investigate the nitrite scavenging activity of the ethanol and water extracts obtained from Hizikia fusiforme and Sargassum fulvelum using sodium nitrite under different pH conditions. The nitrite scavenging activity was appeared in all the extracts examined and it showed the highest value at pH 1.2 The ethanol extract of Hizikia fusiforme provided higher activity than the water extract of that. Ohterwise, the nitrite scavenging activity of Sargassum fulvelum ethanol extract was similar to that Sargassum fulvelum water extract. There was significant difference among concentration of extracts Hizikia fusiforme and Sargassum fulvelum. Also, nitrite scavenging activity of the extracts Hizikia fusiforme and Sargassum fulvelum decreased with higher pH condition. In addition, the activity was increaed with higher concentration of extracts Hizikia fusiforme and Sargassum fulvelum in the course of reaction time 30 minute to 3 hour.

깜짝인터뷰-부산 동주대 도서관 김연희 사서

박진우,Park Jin-U 한국도서관협회 2002 圖協會報 Vol.43 No.4

다중 대역 이동 통신 단말기용 이중 반파장 로디드 라인 안테나 설계

박진우,김덕구,정병운,박면주,정용식,이병제,Park, Jin-Woo,Kim, Duk-Gu,Jung, Byung-Woon,Park, Myun-Joo,Cheong, Young-Seek,Lee, Byung-Je 한국전자파학회 2007 한국전자파학회논문지 Vol.18 No.3

본 논문에서는 다중 대역 이동 통신 단말기로의 적용을 위하여 이중 반파장 로디드 라인 구조를 이용한 주파수 가변 안테나가 제안되었다. 제안된 안테나는 추가된 두 개의 인덕턴스 값의 조절을 통하여 두 개의 대역에서 독립적인 주파수 이동이 가능하다. 제작된 안테나의 측정을 통하여 이 안테나는 약 0.54 dB의 적은 최대 이득 변화 내에서 $CELLULAR(824\sim894\;MHz)$, $EGSM(880\sim960\;MHz)$, $DCS1800(1,710\sim1,880\;MHz)$, $PCS1900(1,850\sim1,990\;MHz)$, $WCDMA(1,920\sim2,170\;MHz)$의 대역을 만족할 수 있는 넓은 유효 대역폭을 가지고 있음을 확인하였다. In this paper, a frequency changeable antenna using dual half wavelength loaded line structure is proposed for multiband mobile handset applications. The proposed antenna has a capability of independent frequency shift by controlling two added inductance values in two different bands. Experimental results indicate that the proposed antenna provides enough effective bandwidth to cover $CELLULAR(824\sim894\;MHz)$, $EGSM(880\sim960\;MHz)$, $DCS1800(1,710\sim1,880\;MHz)$, $PCS1900(1,850\sim1,990\;MHz)$ and $WCDMA(1,920\sim2,170\;MHz)$ bands and peak gain variation is only 0.54 dB.

Uroskinase 에 의한 항응혈반응에 관한 연구 Ⅰ. Urokinase 의 정제와 효소 특성

박진우,이현재,김수자 ( Jin Woo Park,Hyun Jae Lee,Soo Ja kim ) 생화학분자생물학회 1980 BMB Reports Vol.13 No.3

The activation of plasminogen to an active fibrinolytic enzyme, plasmin, was studied withe urokinase(EC 3. 4. 26. 99). A crude form of urokinase obtained from human urine was purified partially by an ion exchange column of ECTEOLA and further by an affinity column employing arginine or agmatine as a ligand on Sepharose 4B matrix. The specific activity of the final enzyme preparation was about 1, 300 units per ㎎ protein based on the caseinolytic assay measuring the rate of casein hydrolysis by plasmin formed. The mode of the enzyme action seems to be similar to that of trypsin in term of the esterase activity, but the enzyme is found to be very specific toward plasminogen as the substrate. Characteristic properties of the enzyme including molecular weight, pH and temderature optimum, and some kinetic properties were studied and compared with that of the other proteolytic enzyme of trypsin and plasmin. In addition, based on its associative properties, the nature and the physiological role in the fibrinolysis were also discussed.

Plasminogen 활성제로서의 Urokinase 의 활성화 부위내 작용기들에 대한 연구

박진우,김수자,이현재 ( Jin Woo Park,Soo Ja Kim,Hyun Jae Lee ) 생화학분자생물학회 1983 BMB Reports Vol.16 No.2

In order to elucidate the mechanism of the urokinase- induced plasminogen activetion, catalytically active functional groups which involved in the active site of urokinase molecule were investigated by a series of kinetic and chemical modification experiments. Inhibition study with several lysine and arginine derivatives indicates there involves hydrophobic interaction between urokinase and plasminogen molecules. 6-Amino hexanoic acid shows an exceptional high degree inhibition. The results from a set of pH-activity profiles and several chamical modification experiments suggest there involve at lease one serine hydroxyl moiety and one histidine imidazole group in the active site of the activator urokinase for the catalytic conversion of plaminogen into plasmin. Based on the results obtained, a minimal three step mechanism of the UK-induced plasminogen activation process was proposed as a working model.

CO₂ 수송선 저장탱크의 BOG 측정 실험 및 회수에 관한 연구

박진우,김동선,고민수,조정호,Park, Jin-Woo,Kim, Dong-Sun,Ko, Min-Su,Cho, Jung-Ho 한국청정기술학회 2014 청정기술 Vol.20 No.1

화석연료로부터 에너지를 얻을 때, 연소반응에 의해 이산화탄소가 생성되어 진다. 이렇게 이산화탄소의 배출이 늘어나게 되면 지구온난화 문제가 더욱 심각해지게 된다. 따라서 이를 방지하기 위한 이산화탄소 포집 및 저장기술(carbon capture and storage, CCS) 개발이 요구되고 있다. 하지만 액화 이산화탄소를 수송 시 여러 문제로 인해 지속적으로 BOG (boil-off gas)가 발생하게 된다. 본 연구에서는 $40m^3$저장 탱크 2대에 액화 이산화탄소를 주입하여 압력변화 및 외부열과 선적, 하역 시 발생하는 BOG의 양과 조성을 30일 간 측정하였다. 측정한 결과 16,040 kg의 BOG가 발생하였으며, 조성은 $CO_2$ 99.95%, $N_2$ 0.05%인 것을 알 수 있었다. 또한 상용성 모사기인 PRO/II with PROVISION 9.2를 이용하여 발생한 BOG를 증기 재압축 냉동사이클을 통해 재액화 하는 전산모사를 수행하였다. 그 결과 냉동사이클의 총 순환유량은 42.07 kg/h, 응축기 설비의 소모량은 48.85 kg/h가 나오는 것을 알 수 있었다. $CO_2$ is generated by the combustion reaction, when getting the energy from fossil fuel. If the carbon dioxide emissions increases more, the global warming problem will become more serious. CCS (carbon capture storage) needs to be developed for the prevention of this. When liquefied $CO_2$ is transported, BOG (boil-off gas) is generated because of several problems. In the study, by injecting liquefied $CO_2$ in two tanks which contains $40m^3$each, the amount of BOG and its composition were measured during 30 days when generating pressure changes and external heat, loading, unloading. In result, 16,040 kg of BOG was generated and the composition has been found out to be 99.95% $CO_2$ and 0.05 % $N_2$. Also, we conducted simulation process for reliquefaction of generated BOG with vapor compression cycle using the PRO/II with PROVISION version 9.2. As a result, the refrigeration cycle of the total circulation flow rate was 42.07 kg/h and the condenser utility consumption was 48.85 kg/h.

Studies on the Anticoagulation Process (Fibrinolysis) by Urokinase I. Purification and Characterization of Urokinase from Human Urine

박진우,이현재,김수자,Park, Jin-Woo,Lee, Hyun-Jae,Kim, Soo-Ja 생화학분자생물학회 1980 한국생화학회지 Vol.13 No.3

Urokinase는 비활성 혈장단백질인 프라스민 전구체를 활성화시키는 효소로서, 이 효소반응의 산물인 프라스민이 혈류의 응혈요소인 피브린 가수분해 과정에 참여될 수 있음으로 이 효소, 즉 Urokinase가 지닌 특성을 연주 검토하였다. 효소 시료의 정제는 ECTEOLA 수지에 의한 이온 교환 크로마토그래피 방법과 알지닌 또는 아그마틴을 ligand로 하는 친화성 크로마토그래피 방법을 도입하여 약 60배의 정제도를 얻었으며 이 경우 효소의 비활성도는 약 1,300 units/mg protein 이였다. 효소의 특성 중 특기할만한 사실은 기질 특성으로서, 다른 단백질 분해 효소인 trypsin과 작용은 비슷하나 프라스민 전구체인 프라스민노젠에만 특이하게 작용함을 알았으며 효소활성도의 최적 pH와 최적온도 등에 있어서도 다른 유사단백질 분해효소들과 다름을 알았다. 그 밖의 효소 특성인 기질에 대한 친화력 및 저해제에 의한 결과 등을 토대로 이 효소가 지난 생리적 역할, 즉 피브린 가수분해 조절기능에 대하여도 검토하여 보았다. The activation of plasminogen to an active fibrinolytic enzyme, plasmin, was studied withe urokinase(EC 3.4.26.99). A crude form of urokinase obtained from human urine was purified partially by an ion exchange column of ECTEOLA and further by an affinity column employing arginine or agmatine as a ligand on Sepharose 4B matrix. The specific activity of the final enzyme preparation was about 1,300 units per ㎎ protein based on the caseinolytic assay measuring the rate of casein hydrolysis by plasmin formed. The mode of the enzyme action seems to be similar to that of trypsin in term of the esterase activity, but the enzyme is found to be very specific toward plasminogen as the substrate. Characteristic properties of the enzyme including molecular weight, pH and temderature optimum, and some kinetic properties were studied and compared with that of the other proteolytic enzyme of trypsin and plasmin. In addition, based on its associative properties, the nature and the physiological role in the fibrinolysis were also discussed.