• 대한물리의학회지
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• 제8권2호
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• pp.281-287
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• 2013

PURPOSE: The study was designed to investigate the effects of visual, auditory, and visuoauditory cues on simple Serial Task Performance in heaithy adults. METHODS: Sixty-three right-handed heaithy adults without history of neurological dysfunction were participated. A modified version of the Serial Reaction Time Task (SRTT) using five blocks of perceptual motor sequences was administered. The blocked paradigm consisted of the five blocks with randomly repeated 8 digit sequences with 5 repetition. Three types of sensory cue were employed: visual cue, auditory cue and visuoauditory cue. All subjects were assigned to press the matched botton as quickly and accurately as possible, when one of 8 stimulations was presented(one, two, three, four, five, six, seven, eight). The reaction time, accuracy, and P300 latency were measured during serial task performance. The mean reaction time(ms), accuracy(%), and P300 latency(ms) were compared between three types of cue using ANOVA. RESULTS: The reaction time to auditory cue was significantly longer than visual and visuoauditory cues(p<.001). And accuracy to auditory cue was significantly lower than visual and visuoauditory cues(p<.001). All P300 latency(at Fz, Cz, Pz) were significantly longer than to visual and visuoauditory cues(p<.05). CONCLUSION: It is suggested that type of cues influence in choice reaction. These data may helpful in designing not only effective motor learning training programs for healthy persons but also reeducation programs for patients with neurological dysfunction.

• PNF and Movement
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• 제20권1호
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• pp.135-145
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• 2022

Purpose: The purpose of this study was to investigate the association between cognitive and motor inhibition by comparing muscle activity and ground reaction force during unplanned gait termination according to reaction time measured through the stop-signal task. Methods: Sixteen young adults performed a stop-signal task and an unplanned gait termination separately. The subjects were divided into fast and slow groups based on their stop-signal reaction time (SSRT), as measured by the stop-signal task. Electromyography (EMG) and ground reaction force (GRF) were compared between the groups during unplanned gait termination. The data for gait termination were divided into three phases (Phase 1 to 3). The Mann-Whitney U test was used to compare spatiotemporal gait parameters and EMG and GRF data between groups. Results: The slow group had significantly higher activity of the tibialis anterior in Phase 2 and Phase 3 than the fast group (p <0.05). In Phase 1, the fast group had significantly shorter time to peak amplitude (TPA) of the soleus than the slow group (p <0.05). In Phase 2, the TPA of the tibialis anterior was significantly lower in the fast group than the slow group (p <0.05). In Phase 3, there was no significant difference in the GRF between the two groups (p >0.05). There were no significant difference between the two groups in the spatiotemporal gait parameters (p >0.05). Conclusion: Compared to the slow group, the fast group with cognitive inhibition suppressed muscle activity for unplanned gait termination. The association between SSRT and unplanned gait termination shows that a participant's ability to suppress an incipient finger response is relevant to their ability to construct a corrective gait pattern in a choice-demanding environment.

• 대한전자공학회논문지SD
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• 제49권8호
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• pp.1-9
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• 2012

Quantum-Inspired Evolutionary Algorithm(QEA)은 알고리즘 자체에 충분한 data-level parallelism이 내재되어 있어 GPU를 이용한 가속에 용이하다. 그러나 효과적인 실행시간의 단축을 위해서는 CPU와 GPU에의 적절한 task-mapping이 필요하다. 이때 단순히 함수 자체의 병렬성만을 고려하는 것이 아니라 CPU와 GPU간의 데이터 전송도 고려하여 task-mapping을 할 필요가 있다. 또한 추가적인 성능향상을 위하여 zero-copy host memory와 적절한 execution configuration의 사용, 그리고 memory coalescing 등을 이용할 수 있다. 그 결과 30,000개의 item수를 가진 0-1 knapsack problem에 대한 QEA의 수행을 multi-threading CPU에 비해 평균 3.69배 빠르게 할 수 있었다.

• 한국산업정보학회논문지
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• 제26권4호
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• pp.73-89
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• 2021

대학생 시기에 진로에 대한 목표를 설정하고, 진로를 결정하는 것은 인생에서 매우 중요한 과업 중 하나다. 본 연구에서는 대학생의 진로 선택 동기와 진로 역량 및 진로 결정의 구조적 관계를 조사 분석하여 대학생들의 진로 결정에 도움을 줄 수 있는 자료를 제공하는데 목적을 두고 있다. 이와 같은 연구의 목적을 달성하기 위하여 부산 소재 4년제 D대학에 재학중인 학생을 대상으로 설문 조사를 하였다. 총 326부의 자료가 최종 분석에 사용되었으며, SPSS 25와 AMOS 25를 이용하여 경로 분석을 실시하였다. 본 연구의 연구 결과는 첫째 내재적 진로 선택 동기와 외재적 진로 선택 동기는 각각 진로 역량인 진로 성찰과 진로 관리에 유의한 영향을 미치는 것으로 나타났다. 둘째, 진로 역량인 진로 성찰과 진로 관리는 진로 결정 구성 요인인 진로 결정 구체성과 진로 결정 확신성에 모두 유의한 영향을 미치는 것으로 나타났다. 내재적 진로 선택 동기와 외재적 진로 선택 동기는 진로 역량인 진로 성찰과 진로 관리를 매개하여 진로 결정 구체성과 확신성에 유의한 영향을 미치는 것으로 나타났다. 이상의 연구 결과를 종합해 보면 대학생의 진로 결정의 구체성과 확신성을 높이기 위해서는 학생들의 진로 성찰 역량과 진로 관리 역량을 증진 시킬 필요가 있음을 확인할 수 있었다. 불확실한 고용환경의 변화와 높은 청년 실업률과 함께 직업의 종류가 매우 다양해지고 고도로 전문화되면서 대학생이 자신에게 적합한 진로 결정에 대한 어려움이 가중되고 있다. 현 상황에서 본 연구의 결과는 대학에서의 진로 상담과 진로 지도에 활용할 수 있는 대학생의 진로 결정에 대한 기초 자료를 제공할 수 있을 것이다.

• 한국의류학회지
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• 제36권3호
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• pp.282-296
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• 2012

This study identified the types of motives for reading consumer reviews of apparel products for online stores and classified shoppers into the groups based on motives. Data were collected from eleven Korean women by a focus group interview and from 313 females by an online survey. Respondents were in their 20s' and 30s' with significant experience reading consumer reviews of apparel products for online stores. The seven motives found by interviews were reduced to four types of motives by factor analysis: Right product choice and judgment of product value, risk reduction, saving time and money, and fun/killing time. The motive for the right product choice and judgment of product value was the highest and the motive for fun/killing time was the lowest. Consumers were classified into four groups based on motives: Utilitarian shoppers (25.8%), shopping-task oriented shoppers (36.8%), multiple-motive shoppers (19.7%), and moderate-motive shoppers (17.7%). There were significant differences among age groups and the amount of reading reviews posted on a product and the duration of reading reviews for online stores. In addition, managerial implications were developed.

• 수산경영론집
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• 제46권1호
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• pp.15-28
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• 2015

This research examined a task to foster into the export industry, through analyzing the competitiveness of the ornamental fish industry and identifying the position of Korea's ornamental industry in the world. Ornamental fish in Korea holds the world's leading aquaculture technology, but products are limited to a few species, lacking competitive products. In the case of aquarium supplies, the Korean technology level is receiving relatively positive marks in the global market, but ornamental fish products are lagging behind the global trend. In other words, Korea's ornamental fish industry has the overall technical foundation, but lacks differentiation in the global market. Meanwhile, Korea's market share of world trade market in fishery products is minimal. Growth was also analyzed not high compared to other countries. Various trade competitiveness index results rated very low in competitiveness, but it is hard to compare Korea with other countries which have already built a strong foundation in the ornamental fish industry. Therefore, for the mid to long term Korea should adapt a "Choice and concentration" strategy and focus on the production of ornamental fish and aquarium supplies, which will enable Korea to become differentiated in the global market and capture the world exports.

• Steel and Composite Structures
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• 제3권3호
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• pp.185-198
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• 2003

The concept of performance based seismic design has been gradually accepted by the earthquake engineering profession recently, in which the cost-effectiveness criterion is one of the most important principles and more attention is paid to the structural performance at the inelastic stage. Since there are many uncertainties in seismic design, reliability analysis is a major task in performance based seismic design. However, structural reliability analysis may be very costly and time consuming because the limit state function is usually a highly nonlinear implicit function with respect to the basic design variables, especially for the complex large-scale structures for dynamic and nonlinear analysis. Understanding statistical properties of the structural inelastic deformation, which is the aim of the present paper, is helpful to develop an efficient approximate approach of reliability analysis. The present paper studies the statistical properties of the maximum elastoplastic story drift of steel frames subjected to earthquake load. The randomness of earthquake load, dead load, live load, steel elastic modulus, yield strength and structural member dimensions are considered. Possible probability distributions for the maximum story are evaluated using K-S test. The results show that the choice of the probability distribution for the maximum elastoplastic story drift of steel frames is related to the mean value of the maximum elastoplastic story drift. When the mean drift is small (less than 0.3%), an extreme value type I distribution is the best choice. However, for large drifts (more than 0.35%), an extreme value type II distribution is best.

• 대한지리학회지
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• 제45권1호
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• pp.144-164
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• 2010

이 연구의 목적은 '길 안내' 와 같은 문제해결 과정을 통해 나타나는 학생들의 공간적 문제해결 전략 및 개인차를 밝히는 것이다. 방문객의 길 안내를 위해 학생들이 캠퍼스에 세운 간이 표지판의 위치를 분석하였다. 학생들은 표지판의 위치로 급격한 방향 전환이 필요한 갈림길이나 길 안내의 출발, 도착지점을 선호하였으며, 경로를 선정할 때 효율성, 환경적 특성, 방문객의 심미적 만족감 등 다양한 요인들을 고려하였다. 또한 대부분의 학생들이 방문객의 예상 이동 경로를 따라 일렬로 간이 표지판을 세운 반면, 몇몇 학생들은 복수의 경로를 설정하는 전략을 사용하였다. 한편 동일한 과제를 실내에서 수행하게 했을 때, 실내에서 수행된 과제의 표지판들이 실외의 경우보다 균등한 간격으로 분포하는 특징을 보였다.

• 감성과학
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• 제16권4호
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• pp.535-544
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• 2013

결과에 대한 원인을 추론하는 인지적 정보처리과정에 대한 연구에는 많은 성과가 있었다. 그러나 서로 다른 원인의 무의식적 점화가 과제 결과의 만족도와 과제 재수행에 관한 의사결정에 미치는 영향을 검증한 연구는 찾아보기 어렵다. 본 연구는 암묵적 귀인점화 절차를 사용하여 과제의 결과를 우연 또는 개인적인 노력에 귀인시키는 것이 과제에 대한 만족도와 과제 재수행 의도에 미치는 효과를 알아보기 위해 수행되었다. 이를 위해 지시문을 사용하여 우연과 노력 조건별로 실험참가자들을 점화한 후, O/X 퀴즈 과제 (실험 1) 또는 5지선다형 문제 (실험 2)를 풀게 하였다. 그리고 실제 과제수행 결과와 관계없이 '좋음' 또는 '나쁨'의 피드백을 주고 과제 만족도와 과제의 재수행 의도를 측정하였다. 분석 결과, 과제 만족도는 주로 피드백에 의해 영향을 받지만, 과제 재수행 의도는 피드백과 점화 유형에 따라 상호작용이 있음이 관찰되었다. 즉, '좋음'의 피드백을 받은 조건의 경우, 우연 점화 참가자들보다 노력 점화 참가자들에게서 재수행의도가 높게 나타났고, '나쁨'의 피드백을 받은 조건에서는 우연 점화 참가자들이 노력 점화 참가자들보다 재수행의도가 높았다. 본 연구의 결과는 귀인과 의사결정 관련 연구뿐만 아니라 중독 관련 상담심리연구에도 이론적, 실무적 시사점을 줄 수 있을 것으로 기대한다.

• 지식경영연구
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• 제12권4호
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• pp.1-15
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• 2011

The purpose of this study is to determine abusive supervision and its effect on the resistance to such behavior by workers, and also to determine the moderating roles of subordinate's personalities that can strengthen or weaken the relationship between the abusive supervision and employee behaviors. Because the key factors underlying the choice of individual OCB(Organizational Citizenship Behavior) or organizational OCB have to do with subordinates' concern for the task and relational consequences of their behavior, the analysis focused on Neuroticism, the Big Five domains that represent one's orientations toward task and relational matters, respectively(Costa & McCrae, 1992). For empirical study, survey was performed for the analysis, and a total of 233 was used. The following is a summary of the verification results. First, in the relationships between the use of abusive supervision and employee's OCB, the relationship is negatively correlated to the abusive supervision. Second, moderating effects of subordinates' personalities(neuroticism) between abusive supervision and subordinates' were not verified. Finally, future research will explore the effects of situational variables that affect the extent to which supervisors engage in abusive behavior and how subordinates respond to abusive supervision.