Poster Session : Cancer Biology ; Activities of extract isolated from Rhizopus oryzae KSD-815 on cytotoxicity and antihypertension

( Sang Jin Lee ),( Nark Hyun ),( Dae Young Lee ),( Namin Baek ),( Gye Won Kim ),( Sung Youl Hong ) 생화학분자생물학회 2007 생화학분자생물학회 춘계학술발표논문집 Vol.2007 No.-

Improvement of the Quality of Ojeoksan(Herbal Medicine) Meal Silage by Molasses Supplementation

Gye-Bong Moon(문계봉),Sung-Bok Kim(김성복),Sang-Woo Cha(차상우),Bong-Duk Lee(이봉덕),Sung-Kyung Cho(조성경),Soo-Kee Lee(이수기) 충남대학교 농업과학연구소 2007 농업과학연구 Vol.34 No.1

당밀의 첨가가 오적산박 사일리지의 품질 및 한국재래산양에 대한 기호성을 조사하기 위하여 두가지 실험을 수행하였다. 실험 Ⅰ에서는 오적산박에 당밀을 0, 0.5 및 1.0% 첨가하여 사일리지를 제조하였고, 실험 Ⅱ에서는 오적산박 사일리지의 기호성을 조사하기 위하여 9두의 우리나라 재래산양을 공시하여 당밀 첨가수준별 및 옥수수 사일리지와의 섭취량을 비교하였다. 실험 Ⅰ에서는 당밀의 첨가에 의하여 젖산함량이 유의하게 많아지고, pH와 낙산은 낮게 나타났다. 당밀의 첨가로 사일리지액의 유산균배지 배양시험에 있어 총균수는 증가하였고, 곰팡이 균주는 감소하였다. 그리고 당밀의 첨가에 따라 체외 건물 소실율이 증가하였다. 실험 Ⅱ에서는 당밀의 첨가가 사일리지 건물섭취량에는 유의한 영향을 미치지 못 하였으며, 오적산박 사일리지는 옥수수 사일리지에 비하여 기호성이 좋았다. 결론적으로 오적산박 사일리지에 대한 당밀의 첨가수준은 1% 정도면 품질을 향상시킬 수 있으며, 체외 소화율도 개선할 수 있다고 생각된다.

The effect of TUDCA on the cryopreservation of Hanra horse semen

Sung Woo Kim,Sang Min Shin,Jae-Yeong Lee,Chan-Lan Kim,Yeong Gye Ko 한국실험동물학회 2020 한국실험동물학회 학술발표대회 논문집 Vol.2020 No.7

Improvement of Magnetic Field Homogeneity From the HTS Joint-Less Coil

Lee, Seyeon,Yoon, Miyeon,Park, Sang-Ho,Lee, Ji-Kwang,Hong, Gye-Won,Choi, Kyeongdal,Kim, Woo-Seok IEEE 2018 IEEE transactions on applied superconductivity Vol.28 No.4

<P>The concept of joint-less winding with 2G high-temperature superconductors (HTS) wide conductors proposed by the authors made HTS magnets possible to realize a persistent-current-mode operation. It could successfully maintain reasonable amount of the persistent current in multiple stacked HTS pancake coils with perfectly closed superconducting loops. In this paper, we applied the same technique to HTS layer winding, so called solenoid winding, to make an improvement of the magnetic field quality. To avoid unfavorable gap near at the center plane of the joint-less winding, we made two identically designed joint-less coils and attached them symmetrically. By this particular design of the coil, we could locate the intrinsic gap of the coil far away from the important magnetic center point. We fabricated the joint-less coil according to the design. During the experiment of the coil to measure the central magnetic field, one of the two coils was found to be damaged after the successful cooling down below 20 K and the charging up the healthy one with a persistent magnetic field of 0.5 T, which was just a half of the expected value. The damaged coil will be replaced with a new one, and tested again in the near future.</P>

Membrane Characteristics for Removing Particulates in PFC Wastes

Gye-Nam Kim,Sung-Yeol Lee,Hui-Jun Won,Chong-Hun Jung,Won Jin Oh,Jin-Ho Park 한국방사성폐기물학회 2005 방사성폐기물학회지 Vol.3 No.2

원자력연구시설의 핫셀 내 바닥이나 장치표면에 부착된 고방사능분진의 제거를 위해서 PFC제염기술을 적용한다. 고가인 PFC 용액의 재사용을 위해서는 여과장치의 개발이 필요하고 제염종료 후 이차폐기물의 양을 최소화할 필요가 있다. PFC 제염폐액 내 방사성 입자를 제거하기 위해 핫셀 내의 고방사능분진의 오염 특성을 조사했다. 여과 막을 이용한 입자의 제거효율 측면에서 보면 세라믹 , PVDF, PP 막 모두가 95 이상의 높은 여과 성능을 보였다. 기공 크기가 같은 동일 여과 막에서는 입자가 크거나 가하는 압력이 높을수록 좀더 높은 제거효율을 나타내었고, 3psi이하에서는 PVDF의 제거효율이 다른 막에 비해 작게 나타났다. 플럭스 성능은 PVDF 막이 가장 높은 수준을 나타냈고 세라믹과 PP 막에서는 다소 낮은 성능을 보였다. PVDF 막은 낮은 압력과 짧은 여과시간으로 최대(한계)플럭스에 도달함을 확인하였다. 세라믹 막은 모의입자의 제거 효율은 높지만 다소 낮은 Flux 성능을 나타냈다. 또한, 막 자체의 비싼 가격과 쉽게 부서지는 성질의 단점을 지니고 있지만 무기화합물의 재질로 되어있기 때문에 알파방사능 환경에서 H, 가스를 발생하는 고분자 막인 PVDF, PP 막과 비교하여 훨씬 안정적이었다. 그리고 이들 소수성 여과막들의 특성 비교를 바탕으로 세라믹 막을 적용한 PFC 실증 여과장치의 공정도를 살펴보았다. PFC(Perfluorocarbon) decontamination process is one of best methods to remove hot particulate adhered at inside surface of hot cell and surface of equipment in hot cell. It was necessary to develop a particulate filtration equipment to reuse PFC solution used on PFC decontamination due to its high cost and to minimize the volume of second wastewater. Contamination characteristics of hot particulate were investigated and then a filtration process was presented to remove hot particulate in PFC solution generated through PFC decontamination process. The removal efficiency of PVDF(Poly vinylidene fluoride), PP(Polypropylene), Ceramic(AlO filter showed more than 95. The removal efficiency of PVDF filter was a little lower than those of other kiters at same pressure(3psi). A ceramic filter showed a higher removal efficiency with other filters, while a little lower flux rate than other filters. Due to inorganic composition, a ceramic filter was highly stable against radio nuclides in comparison with PVDF and PP membrane, which generate H gas in e-radioactivity atmosphere. Therefore, the adoption of ceramic filter is estimated to be suitable for the real nitration process.

The Effect of Bias in Data Set for Conceptual Clustering Algorithms

Lee, Gye Sung The Institute of Internet 2019 International journal of advanced smart convergenc Vol.8 No.3

When a partitioned structure is derived from a data set using a clustering algorithm, it is not unusual to have a different set of outcomes when it runs with a different order of data. This problem is known as the order bias problem. Many algorithms in machine learning fields try to achieve optimized result from available training and test data. Optimization is determined by an evaluation function which has also a tendency toward a certain goal. It is inevitable to have a tendency in the evaluation function both for efficiency and for consistency in the result. But its preference for a specific goal in the evaluation function may sometimes lead to unfavorable consequences in the final result of the clustering. To overcome this bias problems, the first clustering process proceeds to construct an initial partition. The initial partition is expected to imply the possible range in the number of final clusters. We apply the data centric sorting to the data objects in the clusters of the partition to rearrange them in a new order. The same clustering procedure is reapplied to the newly arranged data set to build a new partition. We have developed an algorithm that reduces bias effect resulting from how data is fed into the algorithm. Experiment results have been presented to show that the algorithm helps minimize the order bias effects. We have also shown that the current evaluation measure used for the clustering algorithm is biased toward favoring a smaller number of clusters and a larger size of clusters as a result.

Belief Function Retraction and Tracing Algorithm for Rule Refinement

Lee, Gye Sung The Institute of Internet 2019 International journal of advanced smart convergenc Vol.8 No.2

Building a stable knowledge base is an important issue in the application of knowledge engineering. In this paper, we present an algorithm for detecting and locating discrepancies in the line of the reasoning process especially when discrepancies occur on belief values. This includes backtracking the rule firing from a goal node of the rule network. Retracting a belief function allows the current belief state to move back to another belief state without the rule firing. It also gives an estimate, called contribution measure, of how much the rule has an impact on the current belief state. Examining the measure leads the expert to locate the possible cause of problem in the rule. For non-monotonic reasoning, the belief retraction method moves the belief state back to the previous state. A tracing algorithm is presented to identify and locate the cause of problem. This also gives repair suggestions for rule refinement.

Bendable and Splitter-Integrated Optical Subassembly Based on a Flexible Optical Board

Sung Hwan Hwang,Jung Woon Lim,Woo-Jin Lee,Gye Won Kim,Che Hyun Cho,Jong Bea An,Ki Young Jung,Kyung Soon Cha,Byung Sup Rho IEEE 2010 IEEE photonics technology letters Vol.22 No.3

<P>A bendable and splitter-integrated optical subassembly (OSA) is suggested as a short-distance board-to-board optical interconnection. This OSA was fabricated by simply packaging a vertical-cavity surface-emitting laser on a flexible optical board having an embedded 1 × 8 optical splitter waveguide. Finally, we measured various optical characteristics of the OSA, including insertion, twist, and bending losses.</P>

Belief Function Retraction and Tracing Algorithm for Rule Refinement

Gye Sung Lee 한국인터넷방송통신학회 2019 Journal of Advanced Smart Convergence Vol.8 No.2

Building a stable knowledge base is an important issue in the application of knowledge engineering. In this paper, we present an algorithm for detecting and locating discrepancies in the line of the reasoning process especially when discrepancies occur on belief values. This includes backtracking the rule firing from a goal node of the rule network. Retracting a belief function allows the current belief state to move back to another belief state without the rule firing. It also gives an estimate, called contribution measure, of how much the rule has an impact on the current belief state. Examining the measure leads the expert to locate the possible cause of problem in the rule. For non-monotonic reasoning, the belief retraction method moves the belief state back to the previous state. A tracing algorithm is presented to identify and locate the cause of problem. This also gives repair suggestions for rule refinement.

Application of Cyclone to Removal of Hot Particulate in Hot Cell

Gye-Nam Kim,Sung-Yeol Lee,Hui-Jun Won,Chong-Hun Jung,Won Zin Oh 한국방사성폐기물학회 2005 방사성폐기물학회지 Vol.3 No.1

원자력시설 핫셀 (Hot Cell)내에서 핵종실험 시 발생하는 고방사능 분진(Hot Particulate)의 크기는 0.5300 이고 주 핵종은 UO였다. 핫셀 내의 고방사능 분진을 제거하기 위해 사이클론과 Bag/HEPA필터로 구성된 장치를 고안하였고, 이 장치의 사이클론에 의해 고방사능 분진을 최대로 포집할 수 있는 실험조건을 제시했다. 모의입자의 크기가 클수록 입자의 포집효율은 높았다. 모의 입자의 크기가 5 이상일 때, 입자의 포집효율은 보다 높았다. 모의 입자의 크기가 1.0 보다 작을 때, 포집효율은 보다 작았다. 모의 입자의 유입속도가 12 m/sec보다 클 때, 포집효율은 보다 높았다. 그러나 유입속도가 17 m/sec 보다 클 때 포집효율의 증가율은 크지 않았다. 모의입자의 포집효율은 Vortex Finder의 길이가 7.2 cm이하일 때, 길이의 증가와 함께 높아졌지만 7.2 cm 이상일 때는 낮아지기 시작했다. 그러므로 Vortex Finder의 길이가 7.2 cm 일 때, 최대포집효율을 나타냈다. 사이클론 밑에 보조콘 부착 시 모든 속도 범위에서 약 평균 정도 포집효율이 증가하므로 보조콘 부착효과가 크지 않았다. The size and main ingredient of hot particulate generated during the nuclide experiment in hot cells of nuclear facilities were 0.5300 m and UO. A cyclone filter equipment which consists of a cyclone and Bag/HEPA filter was devised to remove hot particulate generated during the nuclide experiment in hot cells of nuclear facilities. The experimental conditions to maximize the collection efficiency of hot particulate were suggested through experiments done with the cyclone filter equipment. With the large size of simulated particulate, the collection efficiency of the particulate was high. When the size of simulated particulate was more than 5 m, the collection efficiency of the particulate was more than and when the size of simulated particulate was less than 1.0 urn, the collection efficiency decreased by less than . If the inflow velocity of simulated particulate was increased, the collection efficiency of the particulate was also increased. When the inflow velocity of simulated particulate was more than 12m/sec, the collection efficiency was higher than , but after 17 m/sec inflow velocity, no change observed. The collection efficiency of the simulated particulate can be enhanced with the length of vortex finder inside the chamber. With the length of vortex finder, 7.2cm, the observed collection efficiency of the particulate was the maximum. Moreover, when the sub-cone was attached under the cyclone, the collection efficiency of cyclone increased . It was found that effect by attachment of sub-cone was not serious.