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Jung, Jae-Woon,Park, Ha-Na,Yoon, Kwang-Sik,Choi, Dong-Ho,Lim, Byung-Jin The Korean Society for Applied Biological Chemistr 2013 Applied Biological Chemistry (Appl Biol Chem) Vol.56 No.6
Characteristics of non-point source (NPS) pollution runoff from a public park in Gwangju, Korea were investigated. Results exhibited the highest pollutant concentrations at the start of the rainfall events due to their build-up and wash off processes. The average event mean concentrations (EMCs) were 27.8, 7.2, 56.3, 7.5, and 0.84 mg/L (range: 4.2-54.8 mg/L) for COD, (0.5-20.8 mg/L) for TOC, (22.3-138.4) for SS, (1.4-18.5 mg/L) for T-N, and (0.17-2.02 mg/L) for T-P, respectively. The study site presented a strong first flush effect for most rainfall events. However, no first flush effect was observed in rainfall events with small rainfall factors (e.g. intensity, amount, and runoff depth). On the other hand, the ratios of total pollution loads discharged by the first 20% of runoff volume were 32% for COD, 34% for TOC, 36% for SS, 42% for T-N, and 50% for T-P. Especially, $MFF_{20}$ (mass first flush) values of T-N and T-P were larger than those of other pollutants (COD, TOC, SS), indicating that T-N and T-P are easily transported by stormwater runoff from the public park. First flush management of T-N and T-P, therefore, is required for efficient water quality management of the public park.
김운학,유영화,박문식 안성산업대학교 2002 論文集 Vol.34 No.-
Several considerations on structural safety of connection part in Finger-Type expansion joint system were presented in this paper. Special considerations were focused on the compressive strength of sealant concrete, the stress of anchor bolt through introducing prestressing force and he reasonability on the magnitude of prestressing force. Tow-and three-dimensional finite element analyses using MIDAS have been performed to check the structural safety of the expansion joint system. The analysis results showed that the excessive compressive stress acting on concrete can be dispersed or reduced only when over 40% of maximum tensile stress acting on bolt obtained by hand calculation is added to the prestressing force. And the design compressive strength of sealant concrete over 400 kgf/㎠ is reasonable, but more attention should be paid to quality control and construction management even though he design value of 500 kgf/㎠ in original design can improve a structural safety.
남기두,김운식,최명호,박완 한국미생물생명공학회 ( 구 한국산업미생물학회 ) 1996 한국미생물·생명공학회지 Vol.24 No.2
증자시 높은 점성이 문제되는 쌀보리를 기질로 알콜발효를 행할 경우, 기질의 점성문제를 해결하여 발효조건을 개선하면서 생산수율을 올릴 수 있는 상업용 액화효소를 검토하였다. 쌀보리 증자액화시 BAN을 사용한 경우 기절의 점도는 T120L의 1/3 정도로 떨어졌으며 최종 알콜수율도 T120L에 비해 원료 Ton 당 4 ℓ 정도 더 높게 나왔다. 알콜의 수율은 사용한 당화효소의 종류에 의해서도 영향을 받았다. 산업 규모에서 BAN을 사용한 쌀보리의저온증자가 가능하였으며 고온증자에 비해 알콜수율도 388.4에서 390.4 ℓ/Ton으로 약간 증가하였다. 또 이때 사용한 기질의 전분가를 분석하였는데, 산가수분해 및 효소가수분해법에 의한 쌀의 전분가 분석치는 큰 차이를 보이지 않았으나 쌀 보리의 경우는 효소가수분해법에 의한 값이 산가수분해법에 비해 10% 정도 낮게 나타났다. 이때 BAN은 T120L에 비해 전분가가 약 1% 높게 나왔다. Various treatments of naked barley with commercial liquefying enzymes have been employed to reduce high viscosity of naked barley in cooking as a raw material for alcohol production and to increase alcohol yield. The enzyme BAN used for cooking and liquefaction of naked barley was able to make a reduction of one third of viscosity and to enhance alcohol yield of 4 l/Ton of raw material than the T120L was. Of course, alcohol yield depended in part on the applied saccharifying enzymes. The low temperature cooking of naked barley with BAN was favorable compared with high temperature cooking of both of reducing viscosity (210 vs. 237 cp) and final alcohol yield (Yp/so; 0.397 vs. 0.395 g/g) in industrial scale.
Park, Woon Ik,Yoon, Jong Moon,Park, Moonkyu,Lee, Jinsup,Kim, Sung Kyu,Jeong, Jae Won,Kim, Kyungho,Jeong, Hu Young,Jeon, Seokwoo,No, Kwang Soo,Lee, Jeong Yong,Jung, Yeon Sik American ChemicalSociety 2012 Nano letters Vol.12 No.3
<P>We report the direct formation of ordered memristor nanostructureson metal and graphene electrodes by a block copolymer self-assemblyprocess. Optimized surface functionalization provides stacking structuresof Si-containing block copolymer thin films to generate uniform memristordevice structures. Both the silicon oxide film and nanodot memristors,which were formed by the plasma oxidation of the self-assembled blockcopolymer thin films, presented unipolar switching behaviors withappropriate set and reset voltages for resistive memory applications.This approach offers a very convenient pathway to fabricate ultrahigh-densityresistive memory devices without relying on high-cost lithographyand pattern-transfer processes.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/nalefd/2012/nalefd.2012.12.issue-3/nl203597d/production/images/medium/nl-2011-03597d_0003.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nl203597d'>ACS Electronic Supporting Info</A></P>
Park, Keun-Ho,Jeong, Myung Ho,Hong, Young Joon,Ahn, Youngkeun,Kim, Hyun Kuk,Koh, Young Yub,Kim, Doo Il,Kim, Sang Wook,Kim, Weon,Rha, Seung Woon,Rhew, Jay Young,Park, Jong Seon,Park, Hun Sik,Bae, Jang Yonsei University, College of Medicine 2018 Yonsei medical journal Vol.59 No.1
<P><B>Purpose</B></P><P>This study sought to determine the 1-year clinical effectiveness and safety of a biodegradable, polymer-containing Biolimus A9™-eluting stent (BES) in Korean patients with acute coronary syndrome (ACS).</P><P><B>Materials and Methods</B></P><P>A total of 1000 ACS patients with 1251 lesions who underwent implantation of BESs at 22 centers in Korea were enrolled between May 2011 and July 2013. We assessed major adverse cardiac events (MACE) defined as the composite of cardiac death, non-fatal myocardial infarction (MI), and clinical-driven target vessel revascularization at 12 months.</P><P><B>Results</B></P><P>Patient mean age was 62.6±11.4 years. 72.8% of the patients were male, 28.5% had diabetes, 32.8% had multi-vessel disease (MVD), and 47.9% presented with acute MI (AMI). The mean global registry of acute coronary events risk score of all patients was 103.0±27.6. The number of stents per patient was 1.3±0.6. The incidences of MACE and definite stent thrombosis at 12 months were 3.9% and 0.2%, respectively. On multivariate Cox-regression analysis, age ≥65 years was identified as an independent predictors of 1-year MACE (hazard ratio=2.474; 95% confidence interval=1.202−5.091). Subgroup analyses revealed no significant differences in the incidence of MACE between patients with and without diabetes (4.3% vs. 3.7%, <I>p</I>=0.667), between those who presented with and without AMI (4.4% vs. 3.4%, <I>p</I>=0.403), and between those with and without MVD (4.6% vs. 3.5%, <I>p</I>=0.387).</P><P><B>Conclusion</B></P><P>Our study demonstrated excellent 1-year clinical outcomes of BES implantation in patients at low-risk for ACS.</P>
위락시설지역의 초기세척현상과 초기 강우-유출고 저류에 따른 저감효율 분석
정재운 ( Jae Woon Jung ),박하나 ( Ha Na Park ),최동호 ( Dong Ho Choi ),백상수 ( Sang Soo Baek ),윤광식 ( Kwang Sik Yoon ),백원진 ( Won Jin Back ),범진아 ( Jin A Beam ),임병진 ( Byung Jin Lim ) 한국물환경학회 2013 한국물환경학회지 Vol.29 No.5
Nonpoint source pollution characteristics of recreation park was investigated. Runoff ratio of recreation park ranged 23-57%, which was lower than other urban area since impervious area was less than 37%. The average BOD, COD, TOC, SS, T-N, T-P, were 14.09, 32.86, 12.19, 121.51, 7.78 and 0.72 mg/L, respectively. First flush of recreation park was analyzed by normalized cumulative load - volume curve and mass first flush ratio(MFFn), MFF10 for BOD, COD, SS, T-P, T-N, TOC were 2.90, 1.59, 2.15, 2.74, 2.60, and 1.59, respectively. Observed data showed that 62% of pollutant could be removed by storaging 5 mm rainfall-runoff and even 3 mm depth could store up to 50% of pollutant in runoff.
Step Up Therapy for Ulcerative Colitis, But Step Down Therapy for the Prevention of Colitic Cancer
Ki-Baik Hahm,Sang Woon Park,So Soon Kim,Hyun Sik Chung,Eun Jeong Jang,Jeong Sang Lee,Young-Joon Surh,Bong Hwan Kim,Seung Hee You,Hyun-Wook Baik,Sang Jong Park,Ju Sang Park,Wee Sik Son 大韓藥學會 2008 大韓藥學會 總會 및 學術大會 Vol.2008 No.2
박찬규,권준원,김유식 한밭대학교 건설안전기술연구소 2002 건설안전기술논문집 Vol.2 No.-
In this study, a computer program is developed for optimum design of the reinforced concrete frames which is able to calculate automatically the optimum variables and total construction cost by the integer variable transformation method. To verify the accuracy of the proposed computer program, its results are compared by the various type of frames. Using the proposed computer program, the various influence of design parameters are studied and their results are analyzed. In this study, the structure used in parametric investigation is frame of 1 bay and 2 bay in 1st story with the beams length of 3.0∼4.5 meters, the columns height of 3.0∼4.5 meters. A total number of parameters are five which is used for the analysis. From the results of parametric investigations considering frames, the convergence are closed 1~ 9 cycle and their influences are very effective. To maximize the efficiency of the section design, the safety selection of reinforce size must be guaranteed and the accurate structural analysis must be accompanied.