• 동력기계공학회지
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• 제16권6호
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• pp.45-51
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• 2012

In this paper, the algorithm for the static analysis of an axisymmetric cylindrical shell by using the finite element-transfer stiffness coefficient method (FE-TSCM) is suggested. TE-TSCM combining both the modeling procedure of the finite element method (FEM) and the transfer procedure of the transfer stiffness coefficient method (TSCM) has the advantages of FEM and TSCM. After computational programs are made by both FE-TSCM and FEM for the stress analysis of the axisymmetric cylindrical shell, we compare the numerical results by FE-TSCM with those of FEM for two computational models in order to confirm the trust of FE-TSCM.

• 동력기계공학회지
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• 제5권4호
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• pp.24-30
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• 2001

The substructure synthesis method(SSM) is developed for overcoming disadvantages of the Finite Element Method(FEM). The concept of the SSM is as follows. After dividing a whole structure into several substructures, every substructures are analyzed by the FEM or experiment. The whole structure is analyzed by using connecting condition and the results of substructures. The concept of the transfer stiffness coefficient method(TSCM) is based on the transfer of the nodal stiffness coefficients which are related to force vectors and displacement vectors at each node of analytical mode1. The superiority of the TSCM to the FEM in the computation accuracy, cost and convenience was confirmed by the numerical computation results. In this paper, the author suggests an efficient vibration analysis method of structures by using the TSCM and the SSM. The trust and the validity of the present method is demonstrated through the numerical results for computation models.

• 한국인터넷방송통신학회논문지
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• 제12권3호
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• pp.209-216
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• 2012

이 글은 소셜 네트워크 서비스와 스마트폰 기술의 시야에서 사용자 손수 제작 콘텐츠의 커뮤니케이션 구조를 모색하였다. 연구 모델의 개발을 위해, 저자는 정밀한 성공 척도의 개발과 선생 연구를 통해 사용자 손수 제작 콘텐츠의 성공 요인을 선별하는데 역점을 두었다. 제안된 모델은 페이스북과 연결된 플리커 등의 사례와 같은 서비스를 고찰하면서 각 개별 서비스 간의 신뢰의 관련성 그리고 소셜 자본의 전환 등에 대한 내용으로 구성된다. 그 결과 네트워크 자체의 조직 특성과 구조가 사용자 손수 제작 콘텐츠의 신뢰 흐름을 파악하는데 중요한 요인이라는 점을 보여주었다. 그리고 소셜 네트워크 서비스를 통해 협업하는 관계를 가능하게 하는 개방된 API 기술들과 Single sign on의 기술을 고찰하였다. 사용자 손수 제작 콘텐츠의 구체적인 특징은 결국 소셜 자본 및 신뢰를 증진시키는데 소셜 네트워크 서비스의 직접 또는 간접적인 네트워크 효과가 갖는 의미를 기술하였다.

• Archives of Plastic Surgery
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• 제44권4호
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• pp.293-300
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• 2017

Background Simulation training is becoming an increasingly important component of skills acquisition in surgical specialties, including Plastic Surgery. Non-living simulation models have an established place in Plastic Surgical microsurgery training, and support the principles of replacement, reduction and refinement of animal use. A more sophisticated version of the basic chicken thigh microsurgery model has been developed to include dissection of a type 1-muscle flap and is described and validated here. Methods A step-by-step dissection guide on how to perform the chicken thigh adductor profundus free muscle flap is demonstrated. Forty trainees performed the novel simulation muscle flap on the last day of a 5-day microsurgery course. Pre- and post-course microvascular anastomosis assessment, along with micro dissection and end product (anastomosis lapse index) assessment, demonstrated skills acquisition. Results The average time to dissect the flap by novice trainees was $82{\pm}24$ minutes, by core trainees $90{\pm}24$ minutes, and by higher trainees $64{\pm}21$ minutes (P=0.013). There was a statistically significant difference in the time to complete the anastomosis between the three levels of training (P=0.001) and there was a significant decrease in the time taken to perform the anastomosis following course completion (P<0.001). Anastomosis lapse index scores improved for all cohorts with post-test average anastomosis lapse index score of $3{\pm}1.4$ (P<0.001). Conclusions The novel chicken thigh adductor profundus free muscle flap model demonstrates face and construct validity for the introduction of the principles of free tissue transfer. The low cost, constant, and reproducible anatomy makes this simulation model a recommended addition to any microsurgical training curriculum.

• Asia Marketing Journal
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• 제21권2호
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• pp.99-115
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• 2019

Branding strategy is important in the hyper-competitive luxury industry. In digitalized market environments, it is critical for luxury brands to transfer their established brand equity from the offline market to the online market. The purpose of this study is to examine the causal relationships between offline brand equity (i.e., brand awareness, brand image, and perceived quality)toward online consumer responses, including satisfaction and loyalty, in the context of luxury brands. In addition, this study investigates the moderating effects of offline brand trust on the relationship between offline brand equity and online satisfaction and loyalty. Data was collected via online surveys. For empirical validation of the proposed hypotheses, a structural equation modeling technique was employed. The results show that offline luxury brand awareness, brand image, and perceived quality have a positive effect on consumers' online satisfaction. Also, offline brand image has a positive effect on online consumer loyalty. The results indicate that there is a significant moderating effect of offline brand trust on the relationship between brand image and e-loyalty. The results of the present study provide implications for luxury brand managers and retailers to develop effective online sales strategies.

• 예술인문사회 융합 멀티미디어 논문지
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• 제6권1호
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• pp.39-48
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• 2016

암묵지는 전이를 통해 증식되며, 가치 또한 증대된다. 암묵지 전이는 조직의 경쟁력 향상을 위한 가장 중요한 역할을 담당하고 있다. 암묵지 전이가 매우 중요함에도 불구하고, 암묵지 전이는 활발히 이루어지지 못하고 있다. 암묵지 전이를 방해하는 장벽이 암묵지 전이를 저해하고 있기 때문이다. 암묵지 전이를 방해하는 장벽은 지식과 지식전문가에 대한 이해부족, 업무 가중 및 미흡한 보상, 신뢰부족과 지식 접착성(Knowledge Stickiness)이다. 암묵지 전이의 장벽을 극복하기 위해서는 암묵지 지식전이를 주도적으로 추진하는 대리인이 필요하다. 지식중개자는 암묵지 전이를 위한 근간이며, 효율적인 지식네트워크의 구축은 암묵지 전이를 위한 핵심성공요소이다. 그러나 지식네트워크 관련된 대부분의 연구는 네트워크의 근접성과 밀도, 중심성 등 기초지표를 활용하는 수준에 머무르고 있다. 암묵지 전이 활성화를 위한 새로운 지식중개인 진단 프레임워크가 필요하다. 따라서 사회연결망분석을 기반으로 조직관점 및 지식근로자관점의 암묵지 전이를 분석하고, 이를 기반으로 BSKT 구축안을 제시하고자 한다.

• Molecules and Cells
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• 제28권5호
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• pp.407-415
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• 2009

The sirtuins are a protein family named after the first identified member, S. cerevisiae Sir2p. Sirtuins are protein deacetylases whose activity is dependent on $NAD^+$ as a cosubstrate. They are structurally defined by two central domains that together form a highly conserved catalytic center, which catalyzes the transfer of an acetyl moiety from acetyllysine to $NAD^+$, yielding nicotinamide, the unique metabolite O-acetyl-ADP-ribose and deacetylated lysine. One or more sirtuins are present in virtually all species from bacteria to mammals. Here we describe a phylogenetic analysis of sirtuins. Based on their phylogenetic relationship, sirtuins can be grouped into over a dozen classes and subclasses. Humans, like most vertebrates, have seven sirtuins: SIRT1-SIRT7. These function in diverse cellular pathways, regulating transcriptional repression, aging, metabolism, DNA damage responses and apoptosis. We show that these seven sirtuins arose early during animal evolution. Conserved residues cluster around the catalytic center of known sirtuin family members.

• Asia Marketing Journal
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• 제19권4호
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• pp.61-85
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• 2018

Open innovation is based on a different knowledge landscape, with a different logic about the sources and uses of technologies. It implies that firms increasingly rely on external sources of innovation by emphasizing these ideas and resources. Using datasets from the UK biotechnology industry, this paper explores firms' willingness to participate in open innovation. The results indicate that the switching cost is identified as the direct predictor of the willingness to participate in open innovation. While high commitment based on the trust with partner increases switching costs, IT infrastructure within the firm decreases switching costs to open innovation. Taken together, this research broadens the study on open innovation by applying the switching cost as a medium of knowledge transfer in the biotech industry.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제15권10호
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• pp.3834-3857
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• 2021

The design of cluster-based routing protocols is necessary for Wireless Sensor Networks (WSN). But, due to the lack of features, the traditional methods face issues, especially on unbalanced energy consumption of routing protocol. This work focuses on enhancing the security and energy efficiency of the system by proposing Energy Efficient Based Secure Routing Protocol (EESRP) which integrates trust management, optimization algorithm and key management. Initially, the locations of the deployed nodes are calculated along with their trust values. Here, packet transfer is maintained securely by compiling a Digital Signature Algorithm (DSA) and Elliptic Curve Cryptography (ECC) approach. Finally, trust, key, location and energy parameters are incorporated in Particle Swarm Optimization (PSO) and meta-heuristic based Harmony Search (HS) method to find the secure shortest path. Our results show that the energy consumption of the proposed approach is 1.06mJ during the transmission mode, and 8.69 mJ during the receive mode which is lower than the existing approaches. The average throughput and the average PDR for the attacks are also high with 72 and 62.5 respectively. The significance of the research is its ability to improve the performance metrics of existing work by combining the advantages of different approaches. After simulating the model, the results have been validated with conventional methods with respect to the number of live nodes, energy efficiency, network lifetime, packet loss rate, scalability, and energy consumption of routing protocol.

• 동력기계공학회지
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• 제5권4호
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• pp.82-89
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• 2001

To design a structural or a mechanical system with the best performance, the main procedure of a typical design usually consists of repeated modifications of design parameters and the investigation of the system response for each set of these parameters. But this procedure requires much time, effort and experience. Sensitivity analysis can provide systematic information for improving performance of a system. The author has studied on the development of the structural analysis algorithm and suggested recently the transfer stiffness coefficient method(TSCM). This method is very suitable algorithm to a personal computer because the concept of the TSCM is based on the transfer of the nodal stiffness coefficients which are related to force and displacement vectors at each node. In this paper, a new sensitivity analysis algorithm using the concept of the TSCM is formulated for the computation of state variable sensitivity in static problems. The trust of the proposed algorithm is confirmed through the comparison with the computation results using existent sensitivity analysis algorithm and reanalysis for computation models.