• 품질경영학회지
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• 제20권2호
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• pp.109-117
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• 1992

An inspection task largely can be seen as a job divided up into a series of visual search and classification subtasks. In these subtasks, an Inspector must performs to compare the standard references proposed in visual environments and recalled in his memory with the visual stimuli to be inspected. It means that the judgement of similarity should be demanded on inspection tasks. Therefore, the inspector's ability for the judgement of similarity and the difference similarity between inspection materials are important factors to effect on performances in inspection tasks. In this paper, to analysis the effect of these factors on inspection time, an inspection task is designed and suggested by means of computer simulator. Especially, the skin conductance responses(SCR) of subjects are measured to evaluate the complexity of tasks due to the difference of similarity between materials. In the results of experiment, the more similar or different the difference of similarity between materials is, the shorter the inspection time is because of the reduction of task complexity. And, When the inspector's cognition for similarity between materials is consistanct, the inpsection time is improved. Concludingly, the consistency of reponses for similarity judgement becomes a measurement to present the performance levels. And the information of inspection time that due to the difference of similarity between materials must be considered in planning and scheduling inspection tasks.

• BMB Reports
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• 제37권1호
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• pp.93-106
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• 2004

The new complexity arising from the genome sequencing projects requires new comprehensive post-genomic strategies: advanced studies in regulatory mechanisms, application of new high-throughput technologies at a genome-wide scale, at the different levels of cellular complexity (genome, transcriptome, proteome and metabolome), efficient analysis of the results, and application of new bioinformatic methods in an integrative or systems biology perspective. This can be accomplished in studies with model organisms under controlled conditions. In this review a perspective of the favourable characteristics of yeast as a touchstone model in post-genomic research is presented. The state-of-the art, latest advances in the field and bottlenecks, new strategies, new regulatory mechanisms, applications (patents) and high-throughput technologies, most of them being developed and validated in yeast, are presented. The optimal characteristics of yeast as a well-defined system for comprehensive studies under controlled conditions makes it a perfect model to be used in integrative, 'systems biology' studies to get new insights into the mechanisms of regulation (regulatory networks) responsible of specific phenotypes under particular environmental conditions, to be applied to more complex organisms (e.g. plants, human).

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2004년도 춘계학술발표대회
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• pp.673-676
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• 2004

Fast and high-quality document clustering algorithms play an important role in providing data exploration by organizing large amounts of information into a small number of meaningful clusters. In particular, hierarchical clustering provide a view of the data at different levels, making the large document collections are adapted to people's instinctive and interested requires. Many papers have shown that the hierarchical clustering method takes good-performance, but is limited because of its quadratic time complexity. In contrast, K-means has a time complexity that is linear in the number of documents, but is thought to produce inferior clusters. Think of the factor of simpleness, high-quality and high-efficiency, we combine the two approaches providing a new system named CONDOR system [10] with hierarchical structure based on document clustering using K-means algorithm to "get the best of both worlds". The performance of CONDOR system is compared with the VIVISIMO hierarchical clustering system [9], and performance is analyzed on feature words selection of specific topics and the optimum hierarchy depth.

• Clinical Nutrition Research
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• 제13권2호
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• pp.121-129
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• 2024

The prevalence of metabolic syndrome caused by diets containing excessive fatty acids is increasing worldwide. Patients with metabolic syndrome exhibit abnormal lipid profiles, chronic inflammation, increased levels of saturated fatty acids, impaired insulin sensitivity, excessive fat accumulation, and neuropathological issues such as memory deficits. In particular, palmitic acid (PA) in saturated fatty acids aggravates inflammation, insulin resistance, impaired glucose tolerance, and synaptic failure. Recently, adiponectin, brain-derived neurotrophic factor (BDNF), and glucose-like peptide-1 (GLP-1) have been investigated to find therapeutic solutions for metabolic syndrome, with findings suggesting that they are involved in insulin sensitivity, enhanced lipid profiles, increased neuronal survival, and improved synaptic plasticity. We investigated the effects of adiponectin, BDNF, and GLP-1 on neurite outgrowth, length, and complexity in PA-treated primary cortical neurons using Sholl analysis. Our findings demonstrate the therapeutic potential of adiponectin, BDNF, and GLP-1 in enhancing synaptic plasticity within brains affected by metabolic imbalance. We underscore the need for additional research into the mechanisms by which adiponectin, BDNF, and GLP-1 influence neural complexity in brains with metabolic imbalances.

• 항공우주시스템공학회지
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• 제8권2호
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• pp.21-26
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• 2014

The aircraft manufacturers are constantly driving to reduce manufacturing lead times and cost at the same time as the product complexity increases and technology continues to change. Integrated Modular Avionics (IMA) is a solution that allows the aviation industry to manage their avionics complexity. IMA defines an integrated system architecture that preserves the fault containment and 'separation of concerns' properties of the federated architectures. In software side, the air transport industry has developed ARINC 653 specification as a standardized Real Time Operating System (RTOS) interface definition for IMA. It allows hosting multiple applications of different software levels on the same hardware in the context of IMA architecture. This paper describes a study that provided the avionics software design for separation of fault and backup of core function to reduce workload of pilot with cost efficiency.

• Architectural research
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• 제4권1호
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• pp.7-16
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• 2002

In order to examine theoretical underpinnings of preference for built forms, 129 subjects are asked to rate a series of 9 slides of residential houses depicting a wide range of architectural styles on a 5 point scale, for coherence, complexity, excitement, familiarity, and natural harmony, respectively. Based on Lee's (2002a, 2002b) two previous studies addressing the issue of aesthetic beauty evaluation for man-made creatures (e.g., residential housing scenes), this study summarizes several meaningful findings. As reported by all the subjects, first, both "desire to visit" and "desire to live in" turned out to be a good predictor of preference as the two measures are highly correlated in statistically significant levels (99.9%). People who desire to visit a spot are more likely to desire to live in it. Second, Pearson's correlations showed that coherence is the opposite end of complexity. The more likely a housing setting is hanging together, the less likely it looks to be complex. Overall, though, it is not clear that the two variables work directly in that way, as weighted on preference ratings. That is, coherence and complexity are likely to be totally two independent systems that affect the ratings of preference. Third, both excitement and environmental sensitivity (e.g., harmony of a house with its surrounding nature) most highly account for the preference for various housing scenes, while familiarity has only a little effect on preference ratings. Possibly, people like or dislike a visual thing, no matter how much they are familiar with it. Finally, this study suggested that design professionals could communicate effectively with their clients if sets of visual standards as an appropriate communication tool for better design are properly established.

• 디지털융복합연구
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• 제13권1호
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• pp.151-162
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• 2015

본 연구는 조직시민행동의 선행요인을 찾고, 그리고 LMX(leader-member exchange)의 매개역할을 살펴보는 것이다. 선행연구 검토를 통해 본 연구는 조직시민행동과 LMX에 영향을 미치는 요인을 개인(분배, 절차 공정성), 그룹(변혁적 리더십, 팀 임파워먼트), 그리고 조직(조직구조의 복잡성)수준으로 분류하였다. 산업단지 공단에 근무하는 종업원들을 대상으로 설문조사를 실시하였고, 총 773부의 설문지가 실증분석에 사용되었다. 실증분석 결과, 절차적 공정성, 변혁적 리더십, 그리고 팀 임파워먼트가 조직시민행동에 정(+)의 영향을 미치는 것으로 나타났다. 또한 분배공정성, 절차공정성, 변혁적 리더십, 팀 임파워먼트, 조직구조의 복잡성은 LMX에 정(+)의 영향을 미치는 것으로 나타났다. 게다가 LMX는 5개의 독립변수(분배공정성, 절차공정성, 변혁적 리더십, 팀 임파워먼트, 조직구조의 복잡성)가 조직시민행동에 미치는 영향관계에서 매개역할을 하는 것으로 나타났다. 연구결과를 바탕으로 연구의 시사점과 한계점 등에 대해서도 논의하였다.

• 한국음향학회지
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• 제30권1호
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• pp.22-32
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• 2011

본 논문은 건축음향 설계에 있어서 가장 많이 활용되고 있는 컴퓨터 시뮬레이션의 정밀도 향상을 위한 3차원 모델의 구체성에 대하여 연구하였다. 본 연구에서는 건축음향 시뮬레이션 프로그램인 odeon 6.5에서 제시하고 있는 transition order의 단계를 기준으로 3D 모델의 구체성을 총 4단계로 구분하였다. 각 실내마감재의 흡음률은 도면에 표기된 재료를 odeon의 material library 및 시험성적서를 참고해 입력하였으며 확산률은 odeon의 마감의 표면형태에 따른 권장치를 입력하였다. 또한 room setup 설정시 사용음선수를 동일하게 입력하였으며, trasition order는 각 모델의 유효표면수에 맞게 입력하였다. 실제 공연장에서 측정한 현장음향실험 결과를 기준으로 시뮬레이션 결과와 비교하여 물리적 음향인자 (음압레벨, 잔향시간, 명료도 등)의 오차를 분석하였다. 또한 가청화시재를 제작하여 현장에서 녹음한 음원과 청감실험을 통해 비교하여 주관적 음향인자 (잔향감, 명료함 등)별 유사 정도를 평가하였다. 물리적 음향인자 분석결과, 가장 구체적인 3D모델의 잔향시간 오차가 가장 작게 나타났으며 명료도의 경우 단순한 모델의 오차가 가장 작았다. 그러나 단순한 모델은 저주파수 대역의 오차가 상대적으로 매우 크게 나타남에 따라 3D 모델을 구체적으로 작성할수록 보다 정밀한 음향예측이 가능할 것으로 판단된다. 또한 주관적 청감실험 결과, 물리적 오차가 작을수록 가청화시재가 원음과 가장 유사하게 들린다고 응답함으로써 3D 모델의 구체성이 가청화시제 제작에 영향을 미치고 있음을 알 수 있었다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2004년도 ICCAS
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• pp.772-776
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• 2004

This paper proposes an interference avoidance approach for Constraint-Based Routing (CBR) algorithm in the Multi-Protocol Label Switching (MPLS) network. The MPLS network itself has a capability of integrating among any layer-3 protocols and any layer-2 protocols of the OSI model. It is based on the label switching technology, which is fast and flexible switching technique using pre-defined Label Switching Paths (LSPs). The MPLS network is a solution for the Traffic Engineering(TE), Quality of Service (QoS), Virtual Private Network (VPN), and Constraint-Based Routing (CBR) issues. According to the MPLS CBR, routing performance requirements are capability for on-line routing, high network throughput, high network utilization, high network scalability, fast rerouting performance, low percentage of call-setup request blocking, and low calculation complexity. There are many previously proposed algorithms such as minimum hop (MH) algorithm, widest shortest path (WSP) algorithm, and minimum interference routing algorithm (MIRA). The MIRA algorithm is currently seemed to be the best solution for the MPLS routing problem in case of selecting a path with minimum interference level. It achieves lower call-setup request blocking, lower interference level, higher network utilization and higher network throughput. However, it suffers from routing calculation complexity which makes it difficult to real task implementation. In this paper, there are three objectives for routing algorithm design, which are minimizing interference levels with other source-destination node pairs, minimizing resource usage by selecting a minimum hop path first, and reducing calculation complexity. The proposed CBR algorithm is based on power factor calculation of total amount of possible path per link and the residual bandwidth in the network. A path with high power factor should be considered as minimum interference path and should be selected for path setup. With the proposed algorithm, all of the three objectives are attained and the approach of selection of a high power factor path could minimize interference level among all source-destination node pairs. The approach of selection of a shortest path from many equal power factor paths approach could minimize the usage of network resource. Then the network has higher resource reservation for future call-setup request. Moreover, the calculation of possible path per link (or interference level indicator) is run only whenever the network topology has been changed. Hence, this approach could reduce routing calculation complexity. The simulation results show that the proposed algorithm has good performance over high network utilization, low call-setup blocking percentage and low routing computation complexity.

• 마케팅과학연구
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• 제18권2호
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• pp.147-187
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• 2008

온라인 게임에서의 경험을 설명하는 대부분의 이전 연구들이 플로우의 역할을 강조하고 있으며, 플로우의 선행요인과 결과요인을 밝히는데 초점을 두었다. 플로우는 온라인상의 몰입경험을 설명하는데 타당한 것으로 기존 연구에서 검증되었고 성과와 직결된다는 점에서 중요한 변수임은 분명하지만, 쾌락적 경험으로서의 온라인 게임을 설명하는 데 있어서는 부족하다. 이러한 기존 연구의 부족한 점을 보완하고자, 본 연구는 음악과 영화분야에서 연구된 쾌락적 반응 연구를 온라인 게임에 적용하여 온라인 게임에서의 다차원적인 경험과정을 보여주고자 하였다. 또한 기존에 쾌락적 반응에 관한 연구를 보완하여 감각적 반응, 상상적 반응, 분석적 반응이 감정적 반응에 주는 영향을 검증하였으며, 플로우를 대신해 쾌락적 반응들이 게임 만족에 주는 영향, 게임 만족이 충성도에 주는 영향을 규명하고자 하였다. 그리고 쾌락적 선호를 조절하거나 매개하는 변수로 알려진 지각된 복잡성에 따른 조절 영향을 확인함으로써, 자극의 차이에 따른 쾌락적 반응의 영향차이를 보지 않았던 기존연구를 확장하였다. 연구결과, 감각적 반응, 상상적 반응, 분석적 반응의 감정적 반응에 대한 유의한 영향, 각각의 쾌락적 반응의 만족에 대한 유의한 영향, 만족의 충성도에 대한 영향이 검증되었다. 그리고 이러한 영향은 지각된 복잡성이 다른 집단 별로 달랐는데, 예상한 바대로 지각된 복잡성이 높은 집단에서는 분석적 반응이 전반적으로 강한 영향을, 그리고 낮은 집단에서는 감각적 반응이 감정과 만족에 강한 영향을 주는 것으로 밝혀졌다. 연구 마지막에는 이러한 결과들에 대한 요약 및 해석, 시사점 및 한계점이 논의되었다.