흡수에서 합성수지 충전물(Nor-Pac, 25mm)로부터 분리작용의 연구

김장호,김재홍,김종수,김형호 동아대학교 환경문제연구소 2002 硏究報告 Vol.25 No.1

This study was carried out to demonstrate the superiority of used packing in view of energy saving and efficiency of mass transfer, comparing with conventional packing. The results are as follows 1. Owing to low pressure drop under high load, 25mm NSW-ring, pp. can cause energy saving. 2. The unique magnitudes of used packing are as follows : C_(G) = 5.78 m = 0.67 n = 0.46 3. Used packing can make high efficiency including energy saving because of low pressure drop per the number of transfer unit. To rate the characteristic of packing, it should be carried out that the measurement of pressure drop per packing height and per the number of transfer unit. This study demonstrated the superiority of used packing by caning out above experiment and could be used as basic reference for design and predicting efficiency of packing tower which is filled with same packing.

고강도 콘크리트 보부재의 구속효과 및 전단거동에 관한 연구

이수형,송재호,장일영 金烏工科大學校 2000 論文集 Vol.21 No.-

Even though concrete is a good material having considerably high durability, problems in durability and reliability take place sometimes when using it. One of the problems is involved in compaction work which depends greatly on human workability. So if concrete which doesn't need compaction work is possible, a higher promotion in reliability of concrete structures is also possible. But problems in reliability can take place depending on the concrete filling condition, even when high-performance concrete is used. High strength concrete beams are dealt concerning shear behavior and confinement in this study. series of high strength concrete beam specimens are tested to investigate their behavior and to determine their ultimate shear stresses. Test variables consist of concrete filing condition, compressive strength of concrete, and shear stirrup ratio. Two cases of concrete filling condition are prepared intentionally in such a way that specimens are cast soundly to obtain perfect filling condition in first case. In second case, in order to simulate the state of poor workmanship, poor workability and unsatisfactory compaction, up to a half the beam section good concrete is filled while poor concrete is filled to the other half. From the test results, load-displacement responses, formation of shear cracks, types of shear failure, and shear strength are analyzed and evaluated. The have no effects of different concrete filling conditions and arrangement of stirrups on the ultimate strength of structures. But, the habe a great influence of concrete filling condition and arrangement of stirrups on total reserved shear force and ductile of structures.

부하분산 및 결함허용을 제공하는 CORBA 기반 원격 회의 시스템 설계

성재철,임주혁,장우혁,조찬윤,최항묵 인제대학교 1999 仁濟論叢 Vol.15 No.1

인터넷 및 통신 기술의 발달에 따라 원격 회의 시스템이나 원격 교육, 가상 대학과 같은 응용에 대한 연구가 활발히 진행되고 있다. 이와 판은 시스템에 기존의 중앙 집중 방식을 사용할 경우에는 서버측의 부하가 모두 집중되어 전체 시스템에 영향을 미치게 될 수 있으므로 분산 시스템을 이용한 연구가 활발히 진행되고 있다. 본 논문에서는 이미지나 텍스트-파일과 같은 자료를 필요로 하는 원격 회의 시스템을 설계하고 Factory 객체와 관계형 통합 데이터 베이스를 이용하여 동적 부하 분산과 동적 결함 허용을 제공하는 시스템을 제안한다. As the technigues of the Interned and Communication are developed, the study about its applications such as Remote Conference system, Remote Education and Cyber University are lively progressing. When the centralized method is applied to those kinds of system mentioned above, the load is mostly occurred in the server side anaitcauas bad effect to the whole system. So the Study about an application such as Remote Conference system, Remote Education and Cyber University is considering using the distributed system. In this paper I would like design a Remote Conference System is soogetled, which needs sub data like images, text files and givers dynamic load balance and dynamic fault tolerance using Factory object and Relational Integrated Data Base.

Genetic Identification of Subspecies and Stocks of Minke Whale Meats Purchased from Korean Markets during 2005-2007

Hung Sun Koh, Kyung Hee Jang, Eui Dong Han, Jae Eun Jo, Seon Ki Jeong, Eui Jeong Ham, Seong Taek In, Jong Hyek Lee, Gu Hee Kweon, Kwang Seon Kim 충북대학교 동물의학연구소 2012 Journal of Biomedical and Translational Research Vol.13 No.2

To identify subspecies and stocks of minke whale meats purchased from Korean markets during 2005-2007, we first obtained their complete sequences of mitochondrial DNA cytochrome b and control region sequences, and compared these sequences to the corresponding sequences of the common minke whale (Balaenoptera acutorostrata), obtained from GenBank. From analyses with partial cytochrome b sequences (383 bp) and non-coding, partial control region sequences (463 bp), Korean mink whale meats are identified as products from the North Pacific minke whale (B. a. scammoni). In addition, the sequences of the partial control region from these meats showed G at site no. 298 and G or A at site no. 463, and the meats appeared to originate from the J stock within this subspecies. Thus, because the J stock has been protected since 1986, implementation of strict regulation measures to reduce their accidental fisheries by catch seems urgent. In addition, B. a. scammoni is distinct from B. a. acutorostrata, with an average Jukes-Cantor distance of 2.21% in the complete control region sequence analysis (935 bp) and 1.31% in the complete cytochrome b gene sequence analysis; the current results support the current subspecies classification, although further sequencing analyses with nuclear genes are necessary.

Prognostic Value of Interleukin-6 in Patients with Interstitial Lung Diseases

( Ji Hoon Jang ),( Jin Han Park ),( Hyo Jung Kim ),( Hyun Kuk Kim ),( Hang-jae Jang ),( Jae Ha Lee ) 대한결핵 및 호흡기학회 2020 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.128 No.-

Background Interstitial lung diseases (ILDs) are chronic, parenchymal lung diseases with a variable clinical course and a poor prognosis. The aim of this study is to investigate the predictive and prognostic value of interleukin-6 (IL-6) in patients with ILD. Methods Eighty three patients, who were diagnosed with ILD from 2016 to 2019 at Haeundae Paik Hospital, were included and clinical data of them were retrospectively reviewed. Results Median follow-up period was 20 months. Mean age was 68.1 years, 65.1% were men and 60.2% were ever-smokers. Among ILDs, IPF was the most common (68.7%), followed by connective tissue disease-associated ILD (14.5%), cryptogenic organizing pneumonia (9.6%) and nonspecific interstitial pneumonia (6.0%). Most patients (62.7%) showed restrictive pattern in lung function test (forced vital capacity: 73.9±15.5% predicted, diffusing capacity of the lung for carbon monoxide: 59.1±17.0% predicted). Baseline level of serum IL-6 and C-reactive protein was 14.9 pg/mL and 2.5 mg/dL, respectively. In 32 (38.6%) patients, disease progression was observed by significant decrease in FVC or DLco compared to baseline lung function test. During follow-up, 20 (24.1%) patients experienced acute exacerbation of ILD and four (4.8%) patients died due to acute exacerbation (AE) and pneumonia. In the multivariable analysis, delta IL-6 (OR 1.067, 95% CI: 1.017-1.119, p = 0.008) was an independent risk factor for AE. According to the Receiver Operating Characteristic Curve analysis, the area under the curve was of 0.824 (p < 0.001) and the optimal cut-off value of serum IL-6 to predict AE was 17.65 pg/mL, with sensitivity of 66.7%, specificity of 89.6%, positive predictive value of 58.8% and negative value of 92.3%. Conclusions In our study, elevated serum IL-6 compared to baseline level was a useful biomarker to predict poor prognosis in patients with ILD.

Isolation of Mycobacterium Species from Free-ranging Wildlife in South Korea

Yun ho Jang,So yoon Ryoo,Yoon ra Jang,Na rae Kim,Jae min Jang,Doan Lan Pham,Hang Lee,Suk Chan Jung,Jae Myung Kim 대한수의학회 2013 대한수의학회 학술대회발표집 Vol.2013 No.-

Genetic Distinctness of Sorex caecutiens hallamontanus (Soricomorpha: Mammalia) from Jeju Island in Korea

Hung Sun Koh,Kyung Hee Jang,Seong Teak In,Eui Dong Han,Jae Eun Jo,Eui Jeong Ham,Seon Ki Jeong,Jong Hyek Lee,Kwang Seon Kim,Gu Hee Kweon 한국동물분류학회 2012 Animal Systematics, Evolution and Diversity Vol.28 No.3

To examine genetic divergences of two endemic Sorex caecutiens subspecies from Korea (S. c. hallamontanus in Korean Jeju Island and S. c. annexus in the mainland Korean Peninsula), we obtained partial cytochrome oxidase I (COI) sequences (429 bp) and complete cytochrome b sequences (1,140 bp) from the two Korean subspecies, and we compared these sequences to the corresponding sequences of S. caecutiens, obtained from GenBank. We found that Jeju S. c. hallamontanus is one of three clades within S. caecutiens, with an average Jukes-Cantor distance of 1.57% in the COI sequences and the distance of 2.07% and 11 fixed site differences in the cytochrome b sequences, indicating that Jeju S. c. hallamontanus is one endemic subspecies with concordant genetic distinctness, although further analyses with nuclear DNA sequences are necessary to confirm these findings. However, S. c. annexus from the mainland Korean Peninsula was not divergent from S. c. macropygmaeus from northeastern China and adjacent Russia, indicating that S. c. annexus from the mainland Korean Peninsula is another endemic subspecies with only morphological differences, although it is necessary to reexamine the subspecies status of S. c. annexus.

흐름 반응기에서 전자빔에 의한 방향족 휘발성 유기화합물의 분해

장재혁,배준석,김병남,박완식,김숙동,원양수,한도흥 한국공업화학회 2003 응용화학 Vol.7 No.1

Oxidative decomposition of aromatic volatile organic compounds(VOCs), toluene and chlorobenzene, were tested in flow reactor under the irradiation of electron bcam. The maximum flow rate and concentration were 20 1/min and 1000 ppm on a basis of volume, respectively. The radistion was carried out under atmospheric pressure and room tempcrature. Main carrier gas was air, and to improve the removal efficiency of VOC, hydrogen pcroxide was added into the mixture of air and VOC.In this work, the removal cfficiencies werc 87.6% and 67.4% at 120 kGy for 100 ppm of toluene and chlorobenzene, respectively As increasing initial concentration of VOC , higher dosage was required for removal of the VOCs.When pure oxtgen being used instead of air, the removal efficiency could be increased additionally by about 40% for high concentrations of VOC . Addition of 28% aqueous hydrogen peroxide could improve the removal efficiency for VOCs. A largc amount of acrosol. which molecular weight may be much higher molecular weight than VOCs, was produced in a course of oxidative decomposition of VOCs.

Lack of Mitochondrial DNA Sequence Divergence between Two Subspecies of the Siberian Weasel from Korea

Hung Sun Koh,Kyung Hee Jang,Jang Geun Oh,Eui Dong Han,Jae Eun Jo,Eui Jeong Ham,Seon Ki Jeong,Jong Hyek Lee,Kwang Seon Kim,Gu Hee Kweon,Seong Teak In 한국동물분류학회 2012 Animal Systematics, Evolution and Diversity Vol.28 No.2

The objective of this study was to determine the degree of mitochondrial DNA (mtDNA) divergence between two subspecies of Mustela sibirica from Korea (M. s. coreanus on the Korean Peninsula and M. s. quelpartis on Jeju Island) and to examine the taxonomic status of M. s. quelpartis. Thus, we obtained complete sequences of mtDNA cytochrome b gene (1,140 bp) from the two subspecies, and these sequences were compared to a corresponding haplotype of M. s. coreanus, downloaded from GenBank. From this analysis, it was observed that the sequences from monogenic M. s. quelpartis on Jeju Island were identical to the sequences of four M. s. coreanus from four locations across the Korean Peninsula, and that the two subspecies formed a single clade; the average nucleotide distance between the two subspecies was 0.26% (range, 0.00 to 0.53%). We found that the subspecies quelpartis is not genetically distinct from the subspecies coreanus, and that this cytochrome b sequencing result does not support the current classification, distinguishing these two subspecies by pelage color. Further systematic analyses using morphometric characters and other DNA markers are necessary to confirm the taxonomic status of M. s. quelpartis.

Use of Extracorporeal Membrane Oxygenation in a Fulminant Course of Amniotic Fluid Embolism Syndrome Immediately after Cesarean Delivery

Jae Ha Lee,Hang Jea Jang,Jin Han Park,Yong Kyun Kim,Ho Ki Min,Sun Young Kim,Hyun-kuk Kim 대한중환자의학회 2016 Acute and Critical Care Vol.31 No.3

Amniotic fluid embolism is rare but is one of the most catastrophic complications in the peripartum period. This syndrome is caused by a maternal anaphylactic reaction to the introduction of fetal material into the pulmonary circulation. When amniotic fluid embolism is suspected, the immediate application of extracorporeal mechanical circulatory support such as veno-arterial extracorporeal membrane oxygenation (ECMO) or cardiopulmonary bypass should be considered. Without the application of extracorporeal mechanical circulatory support, medical supportive care might not be sufficient to maintain cardiopulmonary stabilization in severe cases of amniotic fluid embolism. In this report, we present the case of a 36-year-old pregnant woman who developed an amniotic fluid embolism immediately after a cesarean section. Her catastrophic event started with the sudden onset of severe hypoxia, followed by circulatory collapse within 8 minutes. The veno-arterial mode of extracorporeal membrane oxygenation was initiated immediately. She was successfully resuscitated but with impaired cognitive function. Thus, urgent ECMO should be considered when amniotic fluid embolism syndrome is suspected in patients presenting acute cardiopulmonary collapse.