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Song, K.J.,Ko, R.K.,Kim, H.S.,Ha, H.S.,Ha, D.W.,Oh, S.S.,Park, C.,Yoo, S.-I.,Kim, M.W.,Kim, C.J.,Joo, J.H. Institute of Electrical and Electronics Engineers 2007 IEEE transactions on applied superconductivity Vol.17 No.2
<P>The degree of ferromagnetism of Ni-W<SUB>y</SUB> alloys decreases as W-content y increases. Both the saturation magnetization <I>M</I> <SUB>sat</SUB> and Curie temperature <I>T</I> <SUB>c</SUB> decrease linearly with W-content y, and both <I>M</I> <SUB>sat</SUB> and <I>T</I> <SUB>c</SUB> go to zero at critical concentration of y<SUB>c</SUB> ~9.50 at.% W. To compare with Ni-W alloys, the magnetic properties of a series of both as-rolled (non-textured) and annealed (biaxially textured) [Ni<SUB>97at.%</SUB>-W<SUB>3at.%</SUB>]<SUB>100-x</SUB>-Cu<SUB>x</SUB> alloy tapes with compositions x = 0, 1, 3, 5, and 7 at.%, were studied. Characterization methods included XRD analyses to investigate the biaxial texturing of the annealed [Ni-W]-Cu alloy tapes and studies of the magnetization for both as-rolled and annealed [Ni-W]-Cu alloy tapes. Both the isothermal mass magnetizations <I>M</I>(<I>H</I>) of a series of samples at different fixed temperatures and <I>M</I>(<I>T</I>) in fixed field, were measured. The effect of Cu addition on both the saturation magnetization and Curie temperature T<SUB>c</SUB> of the Ni<SUB>97at.%</SUB>-W<SUB>3at.%</SUB> alloy was investigated.</P>
Park, E-Y,Kim, W-Y,Kim, Y-M,Lee, J-H,Han, K-H,Weiner, I D,Kim, J Gutenberg 2012 HISTOLOGY AND HISTOPATHOLOGY Vol.27 No.12
<P>Potassium depletion (K?-D) induces hypertrophy and hyperplasia of collecting duct cells, and potassium repletion (K?-R) induces regression of these changes. The purpose of this study was to examine the time courses of the changes in cellular composition, the origin of intercalated cells (ICs) and the mechanism responsible for these changes. SD rats received K?-depleted diets for 1, 7, or 14 days. After K?-D for 14 days some of the rats received normal diets for 1, 3, 5, or 7 days. In the inner stripe of the outer medulla, K?-D increased significantly the number and proportion of H?-ATPase-positive ICs, but decreased the proportion of H?-ATPase-negative principal cells (PCs). However, proliferation was limited to H?-ATPase-negative PCs. During K?-R, the cellular composition was recovered to control level. Apoptosis increased during K?-R and exclusively limited in H?-ATPase-negative PCs. Double immunolabeling with antibodies to PC and IC markers identified both cells negative or positive for all markers during both K?-D and K?-R. Electron microscopic observation showed that ultrastructure of AE1-positive some cells were similar to AE1-negative some cells during K?-R. LC3 protein expression increased significantly and autophagic vacuoles appeared particularly in PCs on days 14 of K?-D and in ICs on days 3 of K?-R. These results suggest that PCs and ICs may interconvert in response to changes in dietary K+ availability and that autophagic pathways may be involved in the interconversion.</P>
Effects of Acteoside on Maturation and Development of Porcine Oocytes In Vitro
K. J. Kim,J. H. Lee,X. X. Li,E. Y. Kim,Y. B. Park,K. S. Park,Y. N. Ha,M. Kim,K. W. Han,J. Y. Park,J. Yu,D. S. Lee,Min Kyu Kim 한국동물생명공학회(구 한국동물번식학회) 2011 발생공학 국제심포지엄 및 학술대회 Vol.2011 No.1
Acteoside (verbascoside) is a typical phenylethanoid glycoside, extracted from various plants. It has various biological functions such as anti-oxidant, anti-inflammation, and anti-hypertension. Specially, it was powerful anti-oxidants either by direct scavenging of reactive oxygen and nitrogen species, or by acting as chain-breaking peroxyl radical scavengers. We examined the role of acteoside in IVM medium on the morphological progress of meiosis, developmental competence, and ROS in porcine oocytes. And we investigated effect of acteoside on the oocytes condition represented by cytoplasmic maturation by homogeneous distribution and formation of cytoplasmic organelles and regulation of apoptosis-related genes. The selected COCs were cultured in TCM-199 with various concentration of acteoside: 0 (control), 10, 30, and 50 μM. After 22 h of maturation with hormones, the oocytes were washed twice in a fresh maturation medium before being cultured in hormone-free medium for additional 22 h. The oocytes maturation rates of supplemented with acteoside were no significantly different compared with control group (71.13, 75.96, 72.95 and 73.68%, respectively). Level of ROS was significantly decreased in acteoside treated group. Furthermore, the parthenogenetic blastocyst rate was significantly improved in 10 μM acteoside treated group compared with control group (40.03 vs. 22.95%). During IVM, 10 μM acteoside treated oocytes showed that the mitochondria and lipid droplet were smaller and homogeneous distribution in cytoplasm compare with non-treated control oocytes. And reverse transcription polymerase chain reaction (RT-PCR) witarthenogenetic blstocysts revealed that acteoside increased the anti-apoptoticgenes, otherwise reibued pro-apoptotic genes. In conclusion, our results represents that addition of acteoside to the IVM medium has a beneficial effect in physiology of porcine oocytes such as viability and activation, providing a improved method for porcine oocytes in vitro.
김원석 ( W. S. Kim ),이기명 ( K. M. Lee ),차충근 ( C. K. Cha ),김덕기 ( D. K. Kim ),김영배 ( Y. B. Kim ),유병무 ( B. M. Yoo ),김진홍 ( J. H. Kim ),김영수 ( Y. S. Kim ),조성원 ( S. W. Cho ),함기백 ( K. B. Hahm ) 대한소화기학회 2002 대한소화기학회 춘계학술대회 Vol.2002 No.-
위암의 발생에 관여하는 종양 억제 유전자로는 p53이 잘 알려져 있으며, 주요 작용 기전 중의 하나가 apoptosis 장애 및 cell cycle 조절 실패로 보고되고 있다. 그러나 위암에서 p53의 변이는 30-65% 정도로 보고되고 있어 나머지 위암에서 발암 기전은 의문으로 남아있다. 최근에는 pS2/TFF1 단백질의 변이가 암화의 초기에 관여한다는 사실과 pS2/TFF1 knockout mice에서 위암의 발생되었다는 보고로 위암 발생시 pS2/
K-means 및 헝가리안 알고리즘기반 중소형 유통사업장 배송지역 균등할당 알고리즘 개발
박건우(K. W. Park),전창범(C. B. Jeon),정의연(U. Y. Jung),최원화(W. H. Choi),정홍진(H. J. Jeong),김준(J. Kim),김보현(B. H. Kim) Korean Society for Precision Engineering 2021 한국정밀공학회 학술발표대회 논문집 Vol.2021 No.11월
최근 COVID-19 로 언택트 시대를 맞이하여 유통산업의 물류량은 급진적으로 증가하고 있는 추세이다. 따라서 유통산업은 효율적인 물류관리를 위해 배송 최적화에 노력하고 있다. 하지만 중소형 유통업체는 대형 유통업체에 비해 인력 및 비용의 한계로 배송 최적화에 어려움이 있다. 중소형 유통업체의 배송지 최적화의 이슈는 고객으로부터 접수한 주문의 배송지를 균등하게 할당하는 것이다. 따라서 본 연구는 중소형 유통업체의 배송 최적화를 위해 배송 인력과 배송 이동거리를 고려하여 배송 지역 균등할당 알고리즘을 개발한다. 배송 지역 균등할당 알고리즘은 배송지 밀집도의 특징을 고려하여 배송지를 가용 배송기사에게 균등 할당하는 것이다. 배송지 밀집도 특징을 도출하기 위해 밀도기반 클러스터링 기법인 DBSCAN 으로 배송지의 밀집도가 높은 권역과 낮은 권역으로 나누었다. 밀집도가 높은 권역은 배송 출발지에서 가까우며 배송지 수가 많은 특징을 가지고, 밀집도가 낮은 권역은 배송 출발지에서 멀리 떨어져 있으며 배송지 수가 적은 특징을 가진다. 밀집도가 낮은 권역은 이동거리의 편차가 더 커질 수 있기 때문에 K-means 알고리즘의 Elbow Method 를 사용하여 배송지를 할당한다. 밀집도가 높은 권역은 K-means 알고리즘으로 배송지 그룹을 나누고 그룹의 중심점과 그룹 간 배송지의 거리가 최소가 되게 헝가리안 알고리즘을 적용하여 배송지를 할당한다. 실 데이터를 사용하여 비교한 결과 본 연구에서 제안한 균등알고리즘은 이동거리의 편차와 배송지 수의 편차를 감소시킬 수 있는 것으로 나타났다.
한국에서의 Human T-Cell Leukemia Virus Type-1(HTLV-1)에 대한 혈청학적 및 역학에 관한 연구
이영열,이성열,김은실,이홍복,김병국,이문호,박선양,김노경,서철원,규경채,최강원,조한익,고월청,야마구찌이찌세이 대한내과학회 1986 대한내과학회지 Vol.31 No.2
Type-C retrovirus, human T-cell leukemia virus type-l(HTLV-1), has been shown to be associated etiologically with adult T-cell leukemia, which is an endemic disease in southwestern parts of Japan. We examined the seroepidemiological characteristics of antibody to adult T-cell leukemia virus associated antigen (anti-ATLA-antibody) by the indirect immunofluorescent assay and ELISA from the healthy individuals and various diseased patients in the Republic of Korea, a country adjacent to Japan in which HTLV-1 is endemic. The results were as follows. 24 out of 9,603 individuals(0.25%) were seropiositive. The positve rate was 0.17% in males and 0.36% in females, the sex difference was female predominent relatively. HTLV-1 carriers were found 16 individuals in Seoul, 5 in Kyonggi area, 1 in Chungnam and Jonbuk, respectively, but found only 1 individual in Busan city and Jaejoo area close to southwestern parts of Japan. Positive rate to anti-ATLA-antibody seemed to be high in older age, especially at the 50s(0. 4Yo). In conclusion the prevalence rate of anti-ATLA- antibody seemed to be very low in the Republic of Korea adjacent to Japan in which HTLV-1 is endemic and no patient with adult T-cell leukemia has been found as yet. Also we noted that the Republic of Korea is not an endemic area to HTLV-1.
Effect of Organic Materials on Seedling Growth and Yield of Red Pepper
Seo, Y. W.,Yang, S. K.,Kim, Y. S.,Lim, K. H.,Kim, H. J.,Choi, K. J. 한국유기농업학회 2011 韓國有機農業學會誌 Vol.19 No.S
In this study, growth of pepper seedlings was testedby treating organic materials in a plastic green house in Ssangok-ri Dogok-myeon, Hwasun-gun, Jeollanam Province from February 3, 2010 to April 19, 2010. The raised seedlings were planted to the organic planting area with an interval of 70cmx55cm on April 20 in Deogam-ri Gogeum-myeon Wando-gun and red peppers were harvested at 7 times from July 22 to September 29. Before planting, the plant length of the overgrowth of seedlings was reduced by 26.8% using plant powder treatment as compared to the control group. The red pepper yield was 27% higher than in the control group when 20g of bone ash powder and 20g of plant powder were mixed. The yield tended to increase in other treatments compared to the control group.
Optical subthreshold current method for extracting the interface states in MOS systems
Kim, M.S.,Nam, I.C.,Kim, H.T.,Shin, H.T.,Kim, T.E.,Park, H.S.,Kim, K.S.,Kim, K.H.,Choi, J.B.,Min, K.S.,Kim, D.J.,Kang, D.W.,Kim, D.M. IEEE 2004 IEEE electron device letters Vol.25 No.2
Optical subthreshold current method (OSCM) is proposed for characterizing the interface states in MOS systems using the current-voltage characteristics under a photonic excitation. An optical source with a subbandgap (E<SUB>ph</SUB>>E<SUB>g</SUB>) photonic energy (E<SUB>ph</SUB>=0.943 eV, P<SUB>opt</SUB>=+5 dBm), which is less than the silicon bandgap (E<SUB>g</SUB>=1.12;eV), is employed for the optical subthreshold current characterization of interface states in the photoresponsive energy band. We applied the OSCM method under a subbandgap photonic excitation to MOS systems with a poly-Si gate and verified a U-shaped distribution of interface trap density D<SUB>it</SUB>=10<SUP>10</SUP>∼10<SUP>12</SUP> eV<SUP>-1</SUP>cm<SUP>-2</SUP> for n- and p-type MOSFETs with W/L=30 μm/1.2 μm.