• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2006년도 추계공동학술대회
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• pp.367-372
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• 2006

Since 1990's, many enterprises have constructed Integration Information System. Especially, they want to become an advanced company use ERP package. Already, ERP system come to high level which is stabilized and support independent business process of many industry sectors. Therefore, important success factors for ERP project are change management and organization activation. Although most companies had previous good plans, but those are not satisfied. Because of failed to change management and discontinued next activity for promotion. This paper studied success factors of project team and plan for organization activation. Also, it proposed next study subject about investigate the role of the member of task force team as a factor that makes the ERP system a success. The results of this study can be used for a successful construction of the ERP system as a solution about internal problems of Project team.

• 대한안전경영과학회지
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• 제8권5호
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• pp.231-242
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• 2006

Since 1990's, many enterprises have constructed Integration Information System. Especially, they want to become an advanced company use ERP package. Already, ERP system come to high level which is stabilized and support independent business process of many industry sectors. Therefore, important success factors for ERP project are change management and organization activation. Although most companies had previous good plans, but those are not satisfied. Because of failed to change management and discontinued next activity for promotion. This paper studied success factors of project team and plan for organization activation. Also, it proposed next study subject about investigate the role of the member of task force team as a factor that makes the ERP system a success. The results of this study can be used for a successful construction of the ERP system as a solution about Internal problems of Project team.

• BMB Reports
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• 제47권12호
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• pp.655-659
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• 2014

Integrin-mediated cell adhesion is important for development, immune responses, hemostasis and wound healing. Integrins also function as signal transducing receptors that can control intracellular pathways that regulate cell survival, proliferation, and cell fate. Conversely, cells can modulate the affinity of integrins for their ligands a process operationally defined as integrin activation. Analysis of activation of integrins has now provided a detailed molecular understanding of this unique form of "inside-out" signal transduction and revealed new paradigms of how transmembrane domains (TMD) can transmit long range allosteric changes in transmembrane proteins. Here, we will review how talin and mediates integrin activation and how the integrin TMD can transmit these inside out signals.

• 한국에너지공학회:학술대회논문집
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• 한국에너지공학회 1999년도 춘계 학술발표회 논문집
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• pp.165-170
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• 1999

Palladium membranes have high selectivity of separation and removal of hydrogen to chemical process at high temperature. For the development of hydrogen permeable membrane, palladium was deposited on porous stainless steel support by electroless plating method. In this work, the activation effect on the surface of stainless steel support has been investigated for the effective palladium plating. The morphology and microstructure were characterized by SEM and the composition was analyzed by EDX. It is found that the composition of deposited nuclei on the stainless steel support was changed in accordance with activation cycles. It is also observed that Sn-enriched nuclei has been changed to Pd-enriched nuclei over the fifteenth activation. The uniform deposition of the dense palladium layer on porous stainless steel support has been performing with Sn-enriched nuclei and comparing with Pd-enriched nuclei.

• Journal of Magnetics
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• 제5권4호
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• pp.116-119
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• 2000

Magnetic field dependence of magnetization reversal in Co/Pt multilayers was quantitatively investigated. Serial samples of Co/Pt multilayers were prepared by dc-magnetron sputtering under various Ar pressures. Magnetization reversal was monitored by magnetization viscosity measurement and direct domain observation using a magneto-optical microscope system, and the wall-motion speed V and the nucleation rate R were determined using a domain reversal model based on time-resolved domain reversal patterns. Both V and R were found to be exponentially dependent on the applied reversing field. From the exponential dependencies, the activation volumes for wall motion and nucleation could be determined, based on a thermally activated relaxation model, and the wall-motion activation volume was found to be slightly larger than the nucleation activation volume.

• 한국세라믹학회지
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• 제36권10호
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• pp.1016-1021
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• 1999

활상탄소섬유는 입상 활성탄에 비해 빠른 흡 · 탈착 속도와 높은 흡착량을 갖기 때문에 흡착재, 촉매, 분자체와 같은 환경 신소재로서 큰 주목을 받고 있다. 본 연구에서는 안정화 PAN계 탄소섬유를 수증기와 CO2를 이용한 물리적 활성화에 의해 여러 등급의 활성탄소섬유를 제조하였고, 비표면적, 요오드 흡착량, 세공구조 등을 측정하였다. 수증기 활성화에서 77%의 burn-off에서 비표면적이 1019 m2/g을 나타내었고, 반면에 CO2 활성화에서는 52%의 burn-off에서 7168m2/g의 비표면적을 갖는 활성탄소섬유가 제조되었다 그러나, 비슷한 burn-off에서는 CO2로 활성화한 경우에서 세공용적이 0.37 cc/g이고, 요오드 흡착량이 1589 mg/g으로서 수증기 활성화보다 더 큰 세공용적과 요오드 흡착량을 나타내었다. 또한 제조된 활성탄소섬유의 질소 흡착등온선들은 Brunaner-Deming-Deming-Teller의 분류에 따르면 모두 type I으로 주로 미세공들로 이루어져 있음을 알 수가 있었다.

• 정보처리학회논문지:소프트웨어 및 데이터공학
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• 제10권10호
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• pp.407-420
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• 2021

심층신경망은 다양한 문제를 해결하는데 널리 사용되고 있다. 하지만 은닉층이 깊은 심층신경망을 학습하는 동안 빈번히 발생하는 기울기 소실 또는 폭주 문제는 심층신경망 학습의 큰 걸림돌이 되고 있다. 본 연구에서는 기울기 소실이 발생하는 원인 중 비선형활성함수에 의해 발생할 수 있는 기울기 소실 문제를 완화하기 위해 파라메트릭 활성함수를 제안한다. 제안된 파라메트릭 활성함수는 입력 데이터의 특성에 따라 활성함수의 크기 및 위치를 변환시킬 수 있는 파라미터를 적용하여 얻을 수 있으며 역전파과정을 통해 활성함수의 미분 크기에 제한이 없는 손실함수를 최소화되도록 학습시킬 수 있다. 은닉층 수가 10개인 XOR문제와 은닉층 수가 8개인 MNIST 분류문제를 통하여 기존 비선형활성함수와 파라메트릭활성함수의 성능을 비교하였고 제안한 파라메트릭 활성함수가 기울기 소실 완화에 우월한 성능을 가짐을 확인하였다.

• The Korean Journal of Physiology and Pharmacology
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• 제23권5호
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• pp.357-366
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• 2019

$G{\alpha}_q$-coupled receptor stimulation was implied in the activation process of transient receptor potential canonical (TRPC)1/4 and TRPC1/5 heterotetrameric channels. The inactivation occurs due to phosphatidylinositol 4,5-biphosphate ($PI(4,5)P_2$) depletion. When $PI(4,5)P_2$ depletion was induced by muscarinic stimulation or inositol polyphosphate 5-phosphatase (Inp54p), however, the inactivation by muscarinic stimulation was greater compared to that by Inp54p. The aim of this study was to investigate the complete inactivation mechanism of the heteromeric channels upon $G{\alpha}_q$-phospholipase $C{\beta}$ ($G{\alpha}_q-PLC{\beta}$) activation. We evaluated the activity of heteromeric channels with electrophysiological recording in HEK293 cells expressing TRPC channels. TRPC1/4 and TRPC1/5 heteromers undergo further inhibition in $PLC{\beta}$ activation and calcium/protein kinase C (PKC) signaling. Nevertheless, the key factors differ. For TRPC1/4, the inactivation process was facilitated by $Ca^{2+}$ release from the endoplasmic reticulum, and for TRPC1/5, activation of PKC was concerned mostly. We conclude that the subsequent increase in cytoplasmic $Ca^{2+}$ due to $Ca^{2+}$ release from the endoplasmic reticulum and activation of PKC resulted in a second phase of channel inhibition following $PI(4,5)P_2$ depletion.

• 마이크로전자및패키징학회지
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• 제24권4호
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• pp.59-63
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• 2017

n-type GaN 반도체는 광전극으로서 우수한 성질을 가지고 있지만, 표면에서 일어나는 산소반응으로 인한 광부식으로 신뢰성이 저하되는 큰 단점이 있다. 이를 근본적으로 억제하기 위하여 표면에서 수소 발생 반응이 일어나는 p-type GaN를 광전극으로 사용함으로써 광부식을 피하고자 하는 연구가 진행되고 있다. 하지만 p-type GaN은 비저항이 높고 정공 이동도가 낮기 때문에 효율이 낮다는 단점을 가지고 있다. 본 연구에서는 이러한 문제를 p-type GaN의 activation 공정을 통해 개선하고자 한다. 전극으로 사용될 p-type GaN을 $N_2$ 분위기의 $500^{\circ}C$에서 1 분 동안 annealing을 하였다. Hall effect 측정을 통하여 전기적 특성을 확인하였으며, potentiostat (PARSTAT4000) 측정을 통하여 광전기화학적 (photoelectrochemical, PEC) 특성을 분석하였다. 그 결과 annealing 공정을 통하여 광전류밀도가 1.5배 이상 향상되었으며, 3시간 동안 안정적인 광전류 값을 확인하였다.

• 한국응용과학기술학회지
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• 제31권3호
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• pp.408-415
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• 2014

In order to prepare high-quality activated carbons (ACs), coal tar pitch (CTP), and mixtures of CTP and petroleum pitch (PP) were activated with KOH. The ACs prepared by activation of CTP in the range of $700{\sim}1000^{\circ}C$ for 1~5 h had very porous textures with large specific surface areas of $2470{\sim}3081m^2/g$. The optimal activation conditions of CTP were determined as CTP/KOH ratio of 1:4, activation temperature of $900^{\circ}C$, and activation time of 3 h. The obtained AC showed the highest micro-pore volume, and pretty high specific surface area and meso-pore volume. The micro-pore volumes and specific areas of activated mixtures of CTP and PP were similar to each other but the meso-pore volume could be increased. In order to change the degree of crystallinity of precursors before KOH activation process, the CTPs were carbonized in the range of $500{\sim}900^{\circ}C$. As the carbonization temperature increased, the specific surface area and pore volume of the activated ACs with the same activation conditions for CTP decreased dramatically. It was demonstrated that the increased pore size distribution of AC electrodes in the range of 1 to 2 nm plays an important role in the performance of electric double-layer capacitor.