낙동강 상수원수의 오존처리 효과 : II. 회분식 오존처리에 의한 휘발성유기화합물 및 조류제거 효과 II. Removal of VOCs and Algae in Raw Water by Conducting Batch Test of Ozonation Experiments

임영식,이홍재,이도진,허종수,손보균,조주식 한국환경과학회 2002 한국환경과학회지 Vol.11 No.12

This study was carried out to evaluate the pollutant removal efficiencies of the advanced drinking water treatment using ozonation process. For raw water, Nakdong River was used. By conducting batch test of ozonation efficiencies of the ozonation were 94 to 92%, respectively. Removal efficiencies of single VOC compound or mixed VOC compounds in the raw water were 80% to 90% by the ozonation with 2 mg/ℓ dosage and 10 minutes contact time. Removal efficiencies of ABS by the ozonation with 1 mg/ℓ, 3 mg/ℓ dosage and 20 minutes contact time were 83% to 96%, respectively. Almost 67% of chlorophyll-a at the concentration of 38.㎍/ℓ was removed by ozonation at ozone dosage of 1mg/ℓ for 20 min. considering the efficiency of ozone utilization and water treatment, the most effective ozonation could be obtained with high ozone dosage and short and short contact time.

활성탄을 이용한 낙동강 상수원수의 수처리 효과

임영성,강관호,이홍재,서동철,허종수,손보균,조주식 한국환경농학회 2002 한국환경농학회지 Vol.21 No.3

상수원수를 보다 효과적으로 처리함으로서 양질의 수돗물을 공급하기 위한 기초자료를 얻고자 낙동강 상수원수를 대상으로 활성탄처리에 의한 공탐체류시간 및 활성탄 여층 깊이에 따른 수처리 효율과 생물활성탄으로서의 이용 가능성을 조사한 결과는 다음과 같다. 공탑체류시간(EBCT)에 따른 수처리 효율은 EBCT가 증가할수록 증가되었으나 운전시간이 경과함에 따라 활성탄 흡착능력은 감소되어 처리효율도 서서히 감소하였다. 활성탄 여층깊이에 따른 pH 변화는 활성탄 층 깊이에 따라 거의 없었으며, D0는 활성탄 층 깊이가 깊을수록 서서히 감소하였다. KMnO^4 소비량, UV254 흡광물질 DOC 및 THMFP 처리효율은 활성만 표층으로부터 하부로 내려갈수록 증가하였으며, 운전시간이 경과할수록 활성탄 상층부에 형성되어 있던 흡착대파 하부로 이동하였다. DOC의 상당 부분이 활성탄여과지에 서식하는 미생물 작용에 의해 분해 제거되는 것으로 나타났으며, 운전개시 126일 후의 BAC에서 활성탄 표층으로 부터깊이 20 cm 부근에 미생물이 1.1*10^7 cell/cm^3 이상 존재하는 것으로 관찰되어 생물활성탄 조건을 만족시키고 있었다. This study was carried out to evaluate the pollutant removal efficiencies of the advanced drinking water treatment using mated carbon process. For raw water, Nakdong river was used. From the activated carbon adsorption experiment, the following results were obtained. The efficiency of water treatment enhanced with increase in empty bed contact time. Variation of pH was not detected to the bed depth, but DO content gradually decreased with the bed depth, Removal efficiency of KMnO₄ consumption, UV254 absorption, DOC and THMFP also were increased by increasing in the bed depth. Transition of adsorption zone from upper parts of the bed to the lower parts were detected as treatment periods increased. Large portion of DOCs were degraded and removed by the microbes growing on the surface of activated carbons. Cell numbers of microbes were estimated over 1.1 × 10 exp(7) cell/㎤ at the depth of 20 ㎝ from the surface 126 days after starting operation. The results shown that the activated carbon filter was successfully acted as a biofilm filter.

산불진화정보 관리를 위한 Mobile GIS 공간 데이터 압축기법 개발

조명희,이명보,이시영,김준범,권봉겸,허영진 한국지리정보학회 2004 한국지리정보학회지 Vol.7 No.2

최근 무선 인터넷 및 통신기술의 눈부신 발달과 LBS(location based service)개념을 기반으로 한 mobile GIS 기술 개발은 대규모 산불 발생시 정확한 현장 파악과 신속한 상황보고 뿐만 아니라 사고 예방과 분석·평가에 이르기까지 의사결정지원시스템으로 자리를 잡고 있다. 본 연구에서는 지상진화대의 정확한 위치와 이동상황을 실시간으로 파악하여 안전한 진화작업 유도 및 산불진화 환경정보를 제공을 목적으로 mobile GIS 기술 기반의 산불진화정보 관리시스템을 설계하고 네트워크 부하감소를 위하여 '.gci'라는 공간 데이터 압축기법을 개발하여 면, 선, 주기 데이터에 대하여 51~62%의 높은 압축률을 구현하였다. 따라서 대규모 산불 발생시 일어날 수 있는 안전사고를 미연에 방지하고 사고 발생시 신속한 후속조치로 안전하고 과학적인 산불진화 업무를 수행할 수 있도록 하였다. Recently GPS and mobile GIS technologies based on LBS (location based service) have played an important role as DSS (decision supporting system) for domestic forest fire extinguishment policies. In this study forest fire extinguishments information management system based on mobile GIS technique was designed to seize the exact location on wireless network so that it helps to guide the safe and efficient extinguishments affairs and provide the extinguishments environment toward ground fighting teams and the central forest government in real time. Moreover, possibly to operate this system, the foundation technologies by the name of `. gci such as the spatial data compression method, the spatial data transmission method over wireless network and the spatial analysis interface on PDA should be mainly considered. Especially, in this study the spatial data compression method having high compression rate from 51% to 62% for each polygon, line, and point data, without the loss of data was developed.

원외처방전 검토시 발생한 문의처방 분석

허란희,이주연,임영근,조윤숙,이지영,이영희,정성훈,박종윤,소원희,진보영,한현주,이병구,손인자 한국병원약사회 2002 병원약사회지 Vol.19 No.1

The purpose of this study is to evaluate hospital pharmacist's double-check task of outpatient prescription since separation of dispensary from medical practice carried out, which is being shifted to pharmacists out of hospital gradually. We analyzed 2,613 conference call on prescription out of one-year 488,481 outpatient prescription made in SNUH(Seoul National University Hospital). And it is classified and analyzed by month, by department and by conference call item. This study can provide useful information for doctors and pharmacists. Consequently, the doctors can avoid prescription errors. And the pharmacists can promote the capacity of double-checking prescriptions.

Comparative Genome Analysis and Evaluation of Probiotic Characteristics of Lactobacillus plantarum Strain JDFM LP11

Jae-young Heo,Dong-hyun Shin,Sung Yong Chang,Paul Bogere,Mi Ri Park,Sang-don Ryu,Woong Ji Lee,Bo-hyun Yun,Hak Kyo Lee,Young-hoon Kim,Sang-nam Oh 한국축산식품학회 2018 한국축산식품학회지 Vol.38 No.5

In the current study, the probiotic potential of approximately 250 strains of lactic acid bacteria (LAB) isolated from piglet fecal samples were investigated; among them Lactobacillus plantarum strain JDFM LP11, which possesses significant probiotic potential, with enhanced acid/bile tolerance, attachment to porcine intestinal epithelial cells (IPEC-J2), and antimicrobial activity. The genetic characteristics of strain JDFM LP11 were explored by performing whole genome sequencing (WGS) using a PacBio system. The circular draft genome have a total length of 3,206,883 bp and a total of 3,021 coding sequences were identified. Phylogenetically, three genes, possibly related to survival and metabolic activity in the porcine host, were identified. These genes encode p60, lichenan permease IIC component, and protein TsgA, which are a putative endopeptidase, a component of the phosphotransferase system (PTS), and a major facilitator in the gut environment, respectively. Our findings suggest that understanding the functional and genetic characteristics of L. plantarum strain JDFM LP11, with its candidate genes for gut health, could provide new opportunities and insights into applications in the animal food and feed additive industries.

Effect of Post-Depositon Annealing on the Structural, Optical and Electrical Properties of Ti-doped Indium Oxide Thin Films

Sung-Bo Heo,Hyun-Joo Moon,Jeong-Hyeon Oh,Young-Hwan Song,Tae-Young Eom,Jun-Ho Kim,Daeil Kim 대한금속재료학회(구 대한금속학회) 2016 대한금속·재료학회지 Vol.54 No.10

Ti-doped In₂O₃ (TIO) thin films were deposited on glass substrates by RF magnetron sputtering. The films were then annealed at 100, 200 or 300 °C for 30 min to investigate the effects of the annealing temperature on the films’ structural, electrical and optical properties. The films annealed at 200 °C and above were polycrystalline in phase, and their electrical resistivity decreased to as low as 7.5×10-4 Ω cm at the annealing temperature of 300°C. The films’optical transmittance in the visible wavelength region also improved from 77.7% to 81.2% when the annealing temperature was increased. The TIO films’ figures of merit were evaluated, showing that the TIO films annealed at 300 °C had better optical and electrical performance than the other films prepared using lower-temperature or no annealing.

글자 영상을 위한 학습기반 초고해상도 기법

허보영(Bo-Young Heo),송병철(Byung Cheol Song) 대한전자공학회 2015 전자공학회논문지 Vol.52 No.4

본 논문은 글자 영상을 효과적으로 확대 (up-scaling)하기 위한 학습 기반 초고해상도 (super-resolution; SR) 기법을 제안한다. 제안 기법은 크게 학습 단계와 합성 단계로 나뉜다. 학습 단계에서 다양한 HR (high-resolution) /LR (low-resolution) 글자 영상 쌍들을 수집한다. LR영상들은 양자화를 하고, 충분히 많은 수의 HR-LR 블록쌍들을 추출한다. 양자화된 LR블록을 기준으로 블록 쌍들을 소정의 개수의 클래스들로 구분한다. 클래스 별로 최적의 2D-FIR 필터 계수를 계산하고, 양자화한 후색인용 LR 블록과 함께 사전에 저장한다. 합성 단계에서 입력 LR 영상 내 각 블록을 양자화한 후 사전 내 양자화된 LR블록들과 정합하여 가장 근사한 블록에 대응하는 FIR 필터계수를 선정한다. 마지막으로 선택된 FIR필터로 HR 블록을 합성하여 최종적인 HR영상을 생성한다. 또한, 우리는 잡음이 있는 글자 영상에 대응하기 위해 학습과정에서 잡음 세기에 따른 복수개의 사전들을 제작한다. 입력 LR 영상의 잡음 레벨에 맞는 사전을 선택하여 HR영상을 합성한다. 실험 결과는 제안 기법이 종래 기법보다 잡음이 없는 환경에서는 물론 잡음이 있는 환경에서 우수한 주관적/객관적 화질을 가짐을 보인다. The proposed algorithm consists of two stages: the learning and synthesis stages. At the learning stage, we first collect various high-resolution (HR)-low-resolution (LR) text image pairs, and quantize the LR images, and extract HR-LR block pairs. Based on quantized LR blocks, the LR-HR block pairs are clustered into a pre-determined number of classes. For each class, an optimal 2D-FIR filter is computed, and it is stored into a dictionary with the corresponding LR block for indexing. At the synthesis stage, each quantized LR block in an input LR image is compared with every LR block in the dictionary, and the FIR filter of the best-matched LR block is selected. Finally, a HR block is synthesized with the chosen filter, and a final HR image is produced. Also, in order to cope with noisy environment, we generate multiple dictionaries according to noise level at the learning stage. So, the dictionary corresponding to the noise level of the input image is chosen, and a final HR image is produced using the selected dictionary. Experimental results show that the proposed algorithm outperforms the previous works for noisy images as well as noise-free images.

NC 블록 분포를 이용한 자유곡면의 가공시간 예측

허은영(Heo, Eun Young),박선영(Park, Seon-Young),김보현(Kim, Bo Hyun),김동원(Kim, Dong Won) 대한산업공학회 2004 대한산업공학회 춘계학술대회논문집 Vol.2004 No.2

N-terminal arginylation generates a bimodal degron that modulates autophagic proteolysis

Yoo, Young Dong,Mun, Su Ran,Ji, Chang Hoon,Sung, Ki Woon,Kang, Keum Young,Heo, Ah Jung,Lee, Su Hyun,An, Jee Young,Hwang, Joonsung,Xie, Xiang-Qun,Ciechanover, Aaron,Kim, Bo Yeon,Kwon, Yong Tae National Academy of Sciences 2018 PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF Vol.115 No.12

<P>The conjugation of amino acids to the protein N termini is universally observed in eukaryotes and prokaryotes, yet its functions remain poorly understood. In eukaryotes, the amino acid L-arginine (L-Arg) is conjugated to N-terminal Asp (Nt-Asp), Glu, Gln, Asn, and Cys, directly or associated with posttranslational modifications. Following Ntarginylation, the Nt-Arg is recognized by UBR boxes of N-recognins such as UBR1, UBR2, UBR4/p600, and UBR5/EDD, leading to substrate ubiquitination and proteasomal degradation via the N-end rule pathway. It has been a mystery, however, why studies for the past five decades identified only a handful of Nt-arginylated substrates in mammals, although five of 20 principal amino acids are eligible for arginylation. Here, we show that the Nt-Arg functions as a bimodal degron that directs substrates to either the ubiquitin (Ub)proteasome system (UPS) or macroautophagy depending on physiological states. In normal conditions, the arginylated forms of proteolytic cleavage products, D101-CDC6 and D1156-BRCA1, are targeted to UBR box-containing N-recognins and degraded by the proteasome. However, when proteostasis by the UPS is perturbed, their Nt-Arg redirects these otherwise cellularwastes tomacroautophagy through its binding to the ZZ domain of the autophagic adaptor p62/STQSM/Sequestosome-1. Upon binding to the Nt-Arg, p62 acts as an autophagic N-recognin that undergoes self-polymerization, facilitating cargo collection and lysosomal degradation of p62-cargo complexes. A chemical mimic of Nt-Arg redirects Ub-conjugated substrates from the UPS to macroautophagy and promotes their lysosomal degradation. Our results suggest that the Nt-Arg proteome of arginylated proteins contributes to reprogramming global proteolytic flux under stresses.</P>

Ga doped ZnO 박막의 질소분위기 열처리에 따른 특성 변화

허성보 ( Sung Bo Heo ),이영진 ( Young Jin Lee ),이학민 ( Hak Min Lee ),김선광 ( Sung Kwang Kim ),김유성 ( Yu Sung Kim ),공영민 ( Young Min Kong ),김대일 ( Dae Il Kim ) 한국열처리공학회 2011 熱處理工學會誌 Vol.24 No.6

Ga doped ZnO (GZO) thin films were deposited with RF magnetron sputtering on glass substrate and then the effect of post deposition annealing at nitrogen atmosphere on the structural, optical and electrical properties of the films was investigated. The post deposition annealing process was conducted for 30 minutes at different temperature of 150, 300 and 450℃, respectively. As increase annealing temperature, GZO films show the increment of the prefer orientation of ZnO (002) diffraction peak in the XRD pattern and the optical transmittance in a visible wave region was also increased, while the electrical sheet resistance was decreased. The figure of merit obtained in this study means that GZO films which vacuum annealed at 450℃ have the highest optoelectrical performance in this study. (Received October 12, 2011; Revised November 4, 2011; Accepted November 16, 2011)