http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Strategies in Protein Immobilization on a Gold Surface
Park, Jeho,Kim, Moonil The Korean Vacuum Society 2015 Applied Science and Convergence Technology Vol.24 No.1
Protein immobilization on a gold surface plays an important role in the usefulness of biosensors that utilize gold-coated surfaces such as surface plasmon resonance (SPR), quartz crystal microbalance (QCM), etc. For developing high performance biosensors, it is necessarily required that immobilized proteins must remain biologically active. Loss of protein activity and maintenance of its stability on transducer surfaces is directly associated with the choice of immobilization methods, affecting protein-protein interactions. During the past decade, a variety of strategies have been extensively developed for the effective immobilization of proteins in terms of the orientation, density, and stability of immobilized proteins on analytical devices operating on different principles. In this review, recent advances and novel strategies in protein immobilization technologies developed for biosensors are briefly discussed, thereby providing an useful information for the selection of appropriate immobilization approach.
A Comparative Performance Study for Compute Node Sharing
Jeho Park,Shui F. Lam 한국정보과학회 2012 Journal of Computing Science and Engineering Vol.6 No.4
We introduce a methodology for the study of the application-level performance of time-sharing parallel jobs on a set of compute nodes in high performance clusters and report our findings. We assume that parallel jobs arriving at a cluster need to share a set of nodes with the jobs of other users, in that they must compete for processor time in a time-sharing manner and other limited resources such as memory and I/O in a space-sharing manner. Under the assumption, we developed a methodology to simulate job arrivals to a set of compute nodes, and gather and process performance data to calculate the percentage slowdown of parallel jobs. Our goal through this study is to identify a better combination of jobs that minimize performance degradations due to resource sharing and contention. Through our experiments, we found a couple of interesting behaviors for overlapped parallel jobs, which may be used to suggest alternative job allocation schemes aiming to reduce slowdowns that will inevitably result due to resource sharing on a high performance computing cluster. We suggest three job allocation strategies based on our empirical results and propose further studies of the results using a supercomputing facility at the San Diego Supercomputing Center.
Applications of Field-Effect Transistor (FET)-Type Biosensors
Park, Jeho,Nguyen, Hoang Hiep,Woubit, Abdela,Kim, Moonil The Korean Vacuum Society 2014 Applied Science and Convergence Technology Vol.23 No.2
A field-effect transistor (FET) is one of the most commonly used semiconductor devices. Recently, increasing interest has been given to FET-based biosensors owing totheir outstanding benefits, which are likely to include a greater signal-to-noise ratio (SNR), fast measurement capabilities, and compact or portable instrumentation. Thus far, a number of FET-based biosensors have been developed to study biomolecular interactions, which are the key drivers of biological responses in in vitro or in vivo systems. In this review, the detection principles and characteristics of FET devices are described. In addition, biological applications of FET-type biosensors and the Debye length limitation are discussed.
A Comparative Performance Study for Compute Node Sharing
Park, Jeho,Lam, Shui F. Korean Institute of Information Scientists and Eng 2012 Journal of Computing Science and Engineering Vol.6 No.4
We introduce a methodology for the study of the application-level performance of time-sharing parallel jobs on a set of compute nodes in high performance clusters and report our findings. We assume that parallel jobs arriving at a cluster need to share a set of nodes with the jobs of other users, in that they must compete for processor time in a time-sharing manner and other limited resources such as memory and I/O in a space-sharing manner. Under the assumption, we developed a methodology to simulate job arrivals to a set of compute nodes, and gather and process performance data to calculate the percentage slowdown of parallel jobs. Our goal through this study is to identify a better combination of jobs that minimize performance degradations due to resource sharing and contention. Through our experiments, we found a couple of interesting behaviors for overlapped parallel jobs, which may be used to suggest alternative job allocation schemes aiming to reduce slowdowns that will inevitably result due to resource sharing on a high performance computing cluster. We suggest three job allocation strategies based on our empirical results and propose further studies of the results using a supercomputing facility at the San Diego Supercomputing Center.
Lee, Jeho,Kwak, Jiwon,Ko, Kyoung Chul,Park, Ji Hoon,Ko, Ju Hong,Park, Nojin,Kim, Eunchul,Ryu, Do Hyun,Ahn, Tae Kyu,Lee, Jin Yong,Son, Seung Uk The Royal Society of Chemistry 2012 Chemical communications Vol.48 No.93
<P>New phenothiazine-based organic dyes with two anchoring groups at 3,7 positions and systematic alkyl chains on nitrogen were prepared. Their TiO<SUB>2</SUB>–Pt composites showed excellent photo-catalytic activities in visible light-induced water splitting. Interestingly, phenothiazine dyes with longer alkyl chains showed better stability in catalytic systems.</P> <P>Graphic Abstract</P><P>New phenothiazine-based organic dyes with two anchoring groups were prepared and their TiO<SUB>2</SUB>–Pt composites showed promising photo-catalytic activities in visible light driven water splitting. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c2cc36501d'> </P>
A New Low-voltage Tunable CMOS VDTA-based 10MHz LP/BP Filter
Kyeongmin Park,Junho Bang,Jeho Song 한국산학기술학회 2014 SmartCR Vol.4 No.4
In this paper, a new low-voltage complementary metal oxide semiconductor voltage differencing transconductance amplifier is proposed, and its performance is demonstrated by comparing its theory and simulated results with conventional versions. The main advantage of the proposed voltage differencing transconductance amplifier is that there are only two transistors composing a path from Vdd to Vss. A secondary advantage is that it can operate at very low voltages of less than ± 0.6V, which is superior to that of conventional models that require ± 0.9V and ± 2V. Additionally, a 10MHz multifunction filter is designed with the proposed complementary metal oxide semiconductor voltage differencing transconductance amplifier, which works both as a lowpass filter and a bandpass filter. The performance of the proposed voltage differencing transconductance amplifier and filter is verified using an HSPICE simulation with complementary metal oxide semiconductor 0.18㎛ process parameters.
슘페테리안 경쟁구조하에서 벤처기업의 성장과 스핀아웃 : 메디슨 사례 the Medison Case
이제호,박상문,장현국 한국중소기업학회 2000 기업가정신과 벤처연구 Vol.3 No.2
This study explores spinouts as an alternative to the conventional growth strategy, diversification of a business portfolio under the umbrella of a single organization. We argue that in the context of schumpeterian competition the spinout strategy is more appropriate for high-tech startups than the conventional diversification strategy; Through the case analysis of spinout in Medison Co. Ltd., a Korean high-tech startup, we found that spinouts offer the following benefits: (1) reducing a parent company's exposure to the risk associated with diversification, (2) providing appropriate incentives for motivated employees and keeping entrepreneurship alive, and (3) minimizing communication complexity and administrative costs. On the other hand, it was observed that spinouts can increase transaction costs when functional departments such as marketing department are spun out.