• Fashion & Textile Research Journal
• /
• v.21 no.2
• /
• pp.141-150
• /
• 2019

Online recommendation services help people search for an appropriate product among a huge assortment in stores that also minimize consumers' choice overload. People with a need for uniqueness are likely to prefer this online recommendation service based on individual needs and tastes. This study verifies the effect of consumers' choice overload and similarity avoidance in consumers' evaluation towards an online recommendation service with a focus on innovativeness and use comparability. Two-hundred consumers participated in this study and data were collected through an online survey firm. A mock retailer's webpage was created and showed six types of sneakers, which was presented as a result of product recommendation based on consumers' personal information. Data was analyzed using confirmatory factor analysis (CFA), analysis of variance (ANOVA), and regression analysis. The results show that people with a high similarity avoidance perceive an online recommendation service as an innovative and compatible service. They also perceive a high level of use compatibility for an online recommendation service, especially when it is difficult to choose a product under choice overload. Innovativeness and use compatibility of an online recommendation service increase behavioral intention. The results of this study can contribute to strategies to start online recommendation services from online retailers' websites that identify circumstances in which consumers can adopt innovative services in a positive manner.

• The Journal of the Acoustical Society of Korea
• /
• v.38 no.3
• /
• pp.283-289
• /
• 2019

RLS (Recursive-least-squares) algorithm is known to have good convergence and excellent error level after convergence. However, there is a disadvantage that numerical instability is included in the algorithm due to inverse matrix calculation. In this paper, we propose an algorithm with no matrix inversion to avoid the instability aforementioned. The proposed algorithm still keeps the same convergence performance. In the proposed algorithm, we adopt an averaged gradient-based step size as a self-adjusted step size. In addition, a variable forgetting factor is introduced to provide superior performance for time-varying channel estimation. Through simulations, we compare performance with conventional RLS and show its equivalency. It also shows the merit of the variable forgetting factor in time-varying channels.

• Journal of the Korea Fashion and Costume Design Association
• /
• v.11 no.1
• /
• pp.181-192
• /
• 2009

본 연구는 소비자가 다른 사람과 차별되며 특별하게 지각되고자 하는 성향을 나타내는 소비자의독특성 욕구와 의복에 대한 관심이 브랜드 인식, 브랜드 충성, 및 구매의도와의 어떠한 관계를 지니고 있는지를 밝히고자 하였다. 특히 이러한 관계에 있어 문화간의 차이가 있는지를 알아보기 위하여 한국과 미국 소비자를 대상으로, 소비자특성이 구매의사결정에 미치는 과정의 모형을 검증한 후, 두 모형을 비교 분석하였다. 자료는 설문지를 사용하여 한국과 미국대학생을 중심으로 수집되었으며, 응답이 부정확하거나 불성실한 설문지를 제외하고, 총 485부-한국 271부와 미국 214부-만이 최종 자료 분석에 사용되었다 본 연구에서 사용한 통계분석방법으로 신뢰도 검증을 위하여 SPSS 11.0을 이용하여 신뢰도 계수를 구하였으며, Prelis 2와 Lisrel 8.53으로 확인적 요인분석 및 모형검증을 실시하였다. 한국과 미국소비자의 선택친 모형을 비교한 결과, 전반적인 모형의 구조에도 차이를 보였을 뿐 아니라 각 변수간의 영향력에도 차이가 있음을 나타냈다. 소비자의 독특성 욕구의 하위차원인 '독창적 선택'과 '브랜드 충성도'의 관계는 두 그룹간의 반대의 성향을 보였으며, '비대증적 선택'과 '브랜드 인식'도 또한 한국 소비자는 정의 관계를 보인 반면, 미국소비자는 부의 관계를 나타냈다. 이와 더불어 유사성을 회피하려는 한국소비자들은 브랜드에 충성하는 경향이 있는 반면, 미국소비자들은 브랜드 인식도가 높은 것으로 나타나 두 문화간의 차이가 있음을 뒷받침하였다. '브랜드 충성도'는 두 집단 모두 '구매의도'에 상대적으로 높은 영향을 미치는 것으로 나타났다.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2023.11a
• /
• pp.1153-1154
• /
• 2023

본 논문에서는 아두이노를 이용하여 유아용전동차가 실제 도로와 유사한 환경의 트랙을 자율주행할 수 있는 방법을 찾고자 한다. 라이다와 카메라를 이용하여 차선을 따라 주행하고, 장애물을 회피하고 신호등의 지시에 따라 정지하고 출발하며, 후진 주차를 완수하는 알고리즘을 완성하였다.

• Journal of Advanced Navigation Technology
• /
• v.13 no.5
• /
• pp.646-655
• /
• 2009

This paper presents a new search strategy based on models of evolution in order to solve the problem of collision-free robotic path planning. We designed the robot path planning method with genetic algorithm which has become a well-known technique for optimization, intelligent search. Considering the path points as genes in a chromosome will provide a number of possible solutions on a given map. In this case, path distances that each chromosome creates can be regarded as a fitness measure for the corresponding chromosome. The effectiveness of the proposed genetic algorithm in the path planning was demonstrated by simulation. The proposed search strategy is able to use multiple and static obstacles.

• Proceedings of the Korean Society of Applied Pharmacology
• /
• 1994.04a
• /
• pp.291-291
• /
• 1994

Ibotonic acid와 FeCl$_3$ 투여군은 phosphate buffered saline을 투여한 대조군에 비해 흰쥐의 능동적 회피학습 습득율을 감소시켰고 해마영역의 과산화지질 형성도를 유의하게 증가시켰으며 acetylcholinesterase의 활성을 감소시켰으나 acetylcholine의 농도에는 별영향을 주지 못하였다. 이들 약물은 신경세포 지질막등에 작용하여 노인성 치매에서와 유사한 cholinergic신경계통에 neuronal degeneration을 유발하여 학습능력 감소를 유발한 것으로 보인다. 4,결론 중추 Cholinergic성 신경계활성의 변화와 뇌내 과산화지질의 과다 형성이 학습능력 감소 및 노인성치매의 원인이라고 말할수는 없지만 이러한 뇌내의 변화률이 치매과정과 연관성을 갖는 것으로 보여진다.

• Journal of radiological science and technology
• /
• v.40 no.2
• /
• pp.205-211
• /
• 2017

There is a need for aggressive diagnosis and treatment in middle-aged and high-risk individuals who are more likely to progress from nonalcoholic fatty liver to hepatitis. In this study, nonalcoholic fatty liver was divided into severe, moderate, and severe, and classified by quantitative method using computer analysis of GLCM algorithm. The purpose of this study was to evaluate the characteristics of ultrasound images in the local fat avoidance region. Normal, mild, moderate, severe fatty liver, and focal fat sparing area, 80 cases, respectively. Among the parameters of the GLCM algorithm, the values of the Autocorrelation, Square of the deviation, Sum of averages and Sum of variances with high recognition rate of the liver ultrasound image were calculated. The average recognition rate of the GLCM algorithm was 97.5%. The result of local fat avoidance image analysis showed the most similar value to the normal parenchyma. Ultrasonography can be easily accessed by primary screening, but there may be differences in the accuracy of the test method or the correspondence of results depending on proficiency. GLCM algorithm was applied to quantitatively classify the degree of fatty liver. Local fat avoidance region was similar to normal parenchyma, so it could be predicted to be homogeneous liver parenchyma without fat deposition. We believe that GLCM computer image analysis will provide important information for differentiating not only fatty liver but also other lesions.

• The Journal of Society for e-Business Studies
• /
• v.22 no.4
• /
• pp.117-128
• /
• 2017

The increased national utilization of Bitcoin results in multiple complications. Therefore, there are continuous debates on the subject, the main point being how to characterize Bitcoin's asset nature. The following study bases, focusing on the function value, justifies Bitcoin's asset characterization. Using regression analysis to construct relations between gold and indexes such as CPI, DXY, and S&P500 as well as the relation between Bitcoin and the previously mentioned indexes, the question of whether gold and Bitcoin reacted in a similar fashion to the same indicators was examined. The results conclude that Bitcoin has similarities with gold, showing that it is risk averse and an investable commodity in lieu to profitability when it comes to inflation and currency value. When considered with price volatility, the main force behind the function of investment asset, categorizing Bitcoin as a high-risk financial investment asset rather than as a currency within the system would be more effective for management.

• The Journal of the Korea Contents Association
• /
• v.13 no.11
• /
• pp.699-713
• /
• 2013

This study has three purposes. Firstly, we try to extract the types of the motives of OCBO & OCBI instead of global OCB. Secondly, we compare the types of the motives OCBO & OCBI and those of the motives of global OCB. Finally, using another set of P-sample, we try to find out whether the four types of the motives of OCB found in the study of Kim & Lee(2013) could be found once again. The findings are as follows. First, we found the four types of the motives of OCBO, and three the types of the motives of OCBI. Second we found some similarities and differences at the same time between the types of OCBO, OCBI, & global OCB. Third, except the instrumentality-based type, three of the four types found in the study of Kim & Lee(2013) reappeared in this study. In conclusion, these findings suggest that OCBO & OCBI, the sub-dimensions of OCB, have their own distinctive natures respectively.

• Environmental and Resource Economics Review
• /
• v.25 no.1
• /
• pp.1-25
• /
• 2016

This study investigated the variability of WTP estimates(i.e. mean or median) with ad hoc assumptions of specific parametric probability distributions(i.e. normal, logistic, lognormal, and exponential distribution) to estimate WTP function using dichotomous choice CV data on mortality risk reduction. From the perspective of policy decision, the variability of these WTP estimates are intolerable in comparison with those of Turnbull nonparametric estimation method which is free from ad hoc distribution assumptions. The Turnbull nonparametric estimation can avoid a kind of misspecification bias due to ad hoc assumption of specific parametric distributions. Furthermore, the WTP estimates by Turnbull nonparametric estimation are robust because the similar estimates are elicited from a dichotomous choice or double dichotomous choice CV data, and the statistically significant WTP estimates can be obtained even though it is not possible by parametric estimation methods. If there are considerable variability among those WTP estimates by parametric estimation methods in condition with no criteria of model adequacy, the mean WTPs from Turnbull nonparametric estimation can be the robust estimates without ad hoc assumptions, which can avoid controversial issues in the perspective of policy decisions.