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DGS 공진기를 이용한 소형 마이크로스트립 대역통과 필터의 설계
조영빈,전계석,Cho, Young-Bin,Jun, Kye-Suk 한국통신학회 2005 韓國通信學會論文誌 Vol.30 No.2a
본 연구에서는 인덕턴스와 커패시턴스 특성을 동시에 갖는 I형 DGS 슬롯을 이용하여 공진기를 설계하고 I형 DGS 슬롯의 공진 특성과 open-loop 공진기를 결합한 새로운 형태의 ${\subset}$ 스터브-I형 DGS 공진기를 제안하였으며, 이를 이용한 대역통과 필터를 설계하였다. 이 구조는 통과대역에서 반사손실의 조정이 용이한 특징을 갖는다. 그리고 기존 필터에 비해 초소형화가 가능하며, 부품 실장에 유리하고, IMT-2000 대역의 하모닉 성분 및 불요파 제거 등 다양한 응용을 기대할 수 있다. In this paper, we have proposed a novel DGS(Defected Ground Structure) resonator and has designed the band -pass filter using the proposed ${\subset}$ stub-I type DGS resonator. This structure has strong advantages that can vary the retune loss at the passband freely and also can easily tune the attenuation pole frequency at the stopband. The bandpass filter can be made more smaller than the existing filters and be used to find the various applications for eliminating the harmonics and spurious mode at IMT-2000 band.
Recent Advances in Biological Uses of Traction Force Microscopy
조영빈,박은영,고은민,박진성,신현정 한국정밀공학회 2016 International Journal of Precision Engineering and Vol.17 No.10
Cell traction forces (CTF) generated by the actomyosin cytoskeleton onto a substrate or extracellular matrix (ECM) are essential for many biological processes, including developmental morphogenesis, tissue homeostasis, and cancer metastasis. Because the cellular physical properties are closely related to the pathological states of the cells, affected by various physicochemical stimuli from their neighboring cells or surrounding environments, it is crucial to develop a quantitative measure for cellular responses to these external stimuli. Since the pioneering work of Harris et al. in 1980s1, traction force microscopy (TFM) has been widely used as a standard tool that allows the optical measurement of cellular tractions exerted on 2- and 3-dimensional soft elastic substrates. Recently, there have been many technical advances in conventional TFM to enhance its spatial and temporal resolutions as well as the range of applicability. In this review, we provide a survey on the recent advancement in TFM, especially with a special emphasis on platforms that can externally apply various stimuli such as fluid shear, mechanical tension or compression, biochemical factors, and electric field in a physiologically relevant regime.
趙英彬 全北大學校 1985 論文集 Vol.27 No.-
This paper purport to examine the interaction patterns and approaches of interorganization relationships and organizational strategies. The notion of environment turns out to be very complicated. To simply our analysis, we can adopt the organizational domain, the task environment and the organization-set. Two approches to the study of interorganizational relationships have emerged, exchange theory and power-dependence theory. According to exchange theory, relations form when two or more organizations percieve mutual benefits from interacting. The formation of exchange relation occurs among organizations primarily for two interrelated reasons‥specialization and resource scarcity and when organization seeks to reduce environmantal uncertainty. So the interaction between organizations is voluntary and is characterized by a high degree of cooperation. Power-dependency theory, however, is implied that the motivation to interact is asymmetrical. And power is linked to dependence in interorganizational relations formation. Competition and conflict are the natural form of interaction in this relationships, since each party seeks to attain its own goal at the expense of the others. An integrative approach is needed to incorporate both approaches of interorganizational relations into a single framework. The establishment of appropriate interaction patterns or strategies can be a major organizational consideration. Three cooperative strategies represent different degree of environment control over organizational decision making. The least contol is bargaining, the next is cooptation and the least amount of autonomy is coalition. Dependence introduces constrains and power may have a variety of effects upon interorganizational relations. So organizations seek to minimize the power of other organitions by maintaining alter natives, to acquire prestige and to external linkages of network organizations.