• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제15권5호
• /
• pp.1798-1813
• /
• 2021

This paper proposes a positive experience design approach for Internet of Things (IoT) intelligent products to improve users' subjective well-being in the fields of artificial intelligence and big data. First, the authors selected six target users and taking the Xiaomi IoT intelligent products for the research objects and conducted a thorough observation on how the target users used IoT intelligent products in their own homes over two weeks via a home-visiting interview, group diary, and focus group. Second, they constructed an individual activities table for the participants' IoT intelligent product experience using a hierarchical task analysis (HTA). Third, two researchers sorted out the sub-tasks of happiness in the HTA table. Finally, the authors found the positive experience design approach of IoT intelligent products. The positive experience design approach of IoT intelligent products is proposed from focusing on the personal pleasure experience to individual life meaningful design and group social relationship design, including individual pleasure experience, personal goal realization, group needs satisfaction and the harmony of group relations. The paper uses the two design examples of an interactive kettle and a harmonious chair to further discuss the feasibility of the design approach. In the era of big data, it is helpful for designers to use this design approach to improve the users' sense of sustainable pleasure, achievement perception of their future goal realization, and the well-being of the group's social relationships.

• International Journal of Control, Automation, and Systems
• /
• 제5권1호
• /
• pp.1-7
• /
• 2007

In this paper, the necessary and sufficient conditions for strict positive realness of the rational transfer functions directly from basic definitions in the frequency domain are studied. A new frequency domain approach is used to check if a rational transfer function is a strictly positive real or not. This approach is based on the Taylor expansion and the Maximum Modulus Principle which are the fundamental tools in the complex functions analysis. Four related common statements in the strict positive realness literature which is appeared in the control theory are discussed. The drawback of these common statements is analyzed through some counter examples. Moreover a new necessary condition for strict positive realness is obtained from high frequency behavior of the Nyquist diagram of the transfer function. Finally a more simplified and completed conditions for strict positive realness of single-input single-output linear time-invariant systems are presented based on the complex functions analysis approach.

• Journal of Information Processing Systems
• /
• 제15권3호
• /
• pp.550-569
• /
• 2019

We propose approaches for improving Bloom filter in terms of false positive probability and membership query speed. To reduce the false positive probability, we propose special type of additional Bloom filters that are used to handle false positives caused by the original Bloom filter. Implementing the proposed approach for a routing table lookup, we show that our approach reduces the routing table lookup time by up to 28% compared to the original Bloom filter by handling most false positives within the fast memory. We also introduce an approach for improving the membership query speed. Taking the hash table-like approach while storing only values, the proposed approach shows much faster membership query speed than the original Bloom filter (e.g., 34 times faster with 10 subsets). Even compared to a hash table, our approach reduces the routing table lookup time by up to 58%.

• International Journal of Computer Science & Network Security
• /
• 제21권5호
• /
• pp.129-132
• /
• 2021

Two feature selection approaches are analyzed in this study. First Approach used in this paper is Filter Approach which comprises of correlation technique. It provides two reduced feature sets using positive and negative correlation. Secondly Approach used in this paper is the wrapper approach which comprises of Sequential Forward Selection technique. The reduced feature set obtained by positive correlation results comprises of Rate of Acceleration, Intensity and Formant. The reduced feature set obtained by positive correlation results comprises of Rasta PLP, Log energy, Log power and Zero Crossing Rate. Pitch, Rate of Acceleration, Log Power, MFCC, LPCC is the reduced feature set yield as a result of Sequential Forwarding Selection.

• 한국치위생학회지
• /
• 제12권1호
• /
• pp.167-178
• /
• 2012

Objectives : The purpose of this research is to examine the effects of the goal achievement orientation of the students in dental-hygiene practice classes on their self-efficacy and on their adaptation to and satisfaction with their major. Methods : A survey was conducted among the dental-hygiene students in schools located in the Daegu region on October 24-31, 2011. A total of 212 accomplished questionnaires were gathered as sources of final analytical data. Statistical analysis was conducted on the collected data, using the SPSS 19.0 program. Results : 1. The students who had good personal relationships(p=.000) and who chose their major and school based on their aptitude(p=.029) were found to have a higher degree of satisfaction than those who did not have good personal relationships and who did not choose their major and school based on their aptitude. 2. Self-confidence(p=.004), self-control efficacy(p=.000), mastery approach(p=.000), and performance approach(p=.003) were found to have positive correlations with major adaptation while task difficulty preference(p=.000) was found to have a negative correlation with the same. 3. Self-confidence(p=.004), self-control efficacy(p=.000), mastery approach(p=.000), and performance approach(p=.045) were also found to have a positive correlation with major satisfaction while task difficulty preference(p=.000) was found to have a negative correlation with the same. 4. Mastery approach(p=.000) in goal achievement orientation was found to have a positive effect on self-efficacy while mastery avoidance(p=.001) was found to have a negative effect on the same. Mastery avoidance showed the greatest effect on self-confidence(p=.000) while mastery approach showed the greatest effect on self-control efficacy(p=.000) and task difficulty preference(p=.000). 5. In goal achievement orientation, mastery approach(p=.000) was found to have a positive effect on major adaptation while mastery avoidance was found to have a negative effect on the same. Meanwhile, with regard to self-efficacy, self-control efficacy(p=.037) and task difficulty preference(p=.008) were found to have positive effects on major adaptation. 6. In the case of major satisfaction, mastery approach(p=.000) in goal achievement orientation was found to have a positive effect on it, and in self-efficacy, self-control efficacy(p=.038) and task difficulty preference(p=.002) were found to have positive effects on it. Conclusions : Accordingly, to raise the level of the dental-hygiene students' adaptation to and satisfaction with their major, the students should be given appropriate tasks so that they can raise their mastery goal, and they should be encouraged to raise their approach goal rather than their avoidance goal. In addition, the students should be provided assistance in setting self-expectations and in developing confidence in their capabilities.

• Journal of the Korean Statistical Society
• /
• 제36권2호
• /
• pp.275-284
• /
• 2007

Confidence intervals for the population proportion in a double sampling scheme subject to false-positive misclassification are considered. The confidence intervals are obtained by applying Agresti and Coull's approach, so-called "adding two-failures and two successes". They are compared in terms of coverage probabilities and expected widths with the Wald interval and the confidence interval given by Boese et al. (2006). The latter one is a test-based confidence interval and is known to have good properties. It is shown that the Agresti and Coull's approach provides a relatively simple but effective confidence interval.

• 대한수학회지
• /
• 제47권4호
• /
• pp.845-860
• /
• 2010

In this paper, using the Nehari manifold approach and some variational techniques, we discuss the multiplicity of positive solutions for the p(x)-Laplacian problems with non-negative weight functions and prove that an elliptic equation has at least two positive solutions.

• 디지털융복합연구
• /
• 제10권11호
• /
• pp.589-594
• /
• 2012

초창기 국내 온라인기반 게임은 일부 장르에 집중한 수익중심의 게임개발에 집중해왔다. 하지만 현재는 스마트 환경, 소셜네트워크 중심의 다양한 콘텐츠의 확장과 더불어 게임 역시 더 다양한 대상을 위한 게임 소재가 개발되고 있다. 이에 본 연구에서는 다양한 대상에 기반한 게임 접근 측면에서 게임디자이너 관점의 포지티브(Positive)게임이란 새로운 범주를 조명해 보고자 한다. 그리고 포지티브 게임 개발의 선행단계에 해당하는 디자인 접근에 대하여 디자이너 관점에서 재미기반 범주의 게임접근 프로세스를 구성해 보았다. 디자이너 관점에서의 게임 범주 체계성과 그에 따른 디자인 접근은 유-무선기반 환경, 융합미디어 기반의 새로운 환경에서 게임이 중심적인 인터렉티브 콘텐츠로서 확장하기 위해 필요한 연구이다.

• 한국콘텐츠학회논문지
• /
• 제6권11호
• /
• pp.190-201
• /
• 2006

공익광고의 효과적인 커뮤니케이션 수행에 어려움이 많고, 고도의 독창성이 요구되고, 대다수의 공익광고에서 은유적 표현이 빈번히 사용되어짐에도 불구하고, 이와 관련된 연구가 미비한 실정이다. 이에 본 연구는 공익광고의 은유적 표현의 효과에 대한 실증연구를 통해 은유적 광고전략에 도움을 주고자 하였다. 그 결과 첫째, 긍정적 접근과 간접카피를 사용한 은유광고가 높은 감정적 태도에 효과를 가지는 것으로 나타났다. 둘째, 긍정적 접근과 간접카피를 동시에 사용하였을 때 정보원의 공신력과 디자인선호도는 높게 증가하였다. 셋째, 긍정적 접근과 부정적 접근, 직접카피와 간접카피에 따라 정보신뢰도에 유의한 차이가 없었고, 접근유형과 카피유형에 따라 상호작용효과도 발생하지 않는 것으로 나타났다. 넷째, 간접카피를 사용한 광고가 행동의도에 효과를 가지는 것으로 나타났다. 따라서 공익광고의 효과를 높이기 위해서는 은유광고를 긍정적 접근으로 만드는 전략을 사용하여야 함을 본 연구결과는 시사하고 있다.

• 지능정보연구
• /
• 제23권2호
• /
• pp.39-70
• /
• 2017

최근 여론조사 분야에서 데이터에 기반을 둔 분석 기법이 널리 활용되고 있다. 기업에서는 최근 출시된 제품에 대한 선호도를 조사하기 위해 기존의 설문조사나 전문가의 의견을 단순 취합하는 것이 아니라, 온라인상에 존재하는 다양한 종류의 데이터를 수집하고 분석하여 제품에 대한 대중의 기호를 정확히 파악할 수 있는 방안을 필요로 한다. 기존의 주요 방안에서는 먼저 해당 분야에 대한 감성사전을 구축한다. 전문가들은 수집된 텍스트 문서들로부터 빈도가 높은 단어들을 정리하여 긍정, 부정, 중립을 판단한다. 특정 제품의 선호를 판별하기 위해, 제품에 대한 사용 후기 글을 수집하여 문장을 추출하고, 감성사전을 이용하여 문장들의 긍정, 부정, 중립을 판단하여 최종적으로 긍정과 부정인 문장의 개수를 통해 제품에 대한 선호도를 측정한다. 그리고 제품에 대한 긍 부정 내용을 자동으로 요약하여 제공한다. 이것은 문장들의 감성점수를 산출하여, 긍정과 부정점수가 높은 문장들을 추출한다. 본 연구에서는 일반 대중이 생산한 문서 속에 숨겨져 있는 토픽을 추출하여 주어진 제품의 선호도를 조사하고, 토픽의 긍 부정 내용을 요약하여 보여주는 제품 평판 마이닝 알고리즘을 제안한다. 기존 방식과 다르게, 토픽을 활용하여 쉽고 빠르게 감성사전을 구축할 수 있으며 추출된 토픽을 정제하여 제품의 선호도와 요약 결과의 정확도를 높인다. 실험을 통해, K5, SM5, 아반떼 등의 국내에서 생산된 자동차의 수많은 후기 글들을 수집하였고, 실험 자동차의 긍 부정 비율, 긍 부정 내용 요약, 통계 검정을 실시하여 제안방안의 효용성을 입증하였다.