• 대한인간공학회지
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• 제23권3호
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• pp.73-88
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• 2004

This study was contrived Hierarchical Information Search (HIS) model. HIS model is based on a “cognitive process” in which model, comprising basic human information processing mechanize and information interaction. Its process include 3 semantic cognitive processes: Schema-Association LTM, Form Domain, and Alternative Selection. Design methodology consists to elicitate memory, thinking and cognitive response variables. In case study, menu structure of mobile phone was applied. In result, a correlation between predictive error rate and real error rate was .892. and a correlation between selective and real reaction time was .697. This present to suggest a model of how the methodology could be applied to real system design effectively when this was used. HIS model could become one of the most important factors for success of product design. In the perspective, the systemic methodology would contribute to design a quantitative and predictive system.

• 한국도서관정보학회지
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• 제35권2호
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• pp.199-218
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• 2004

이 연구의 목적은 대학생이 일정한 기간 내에 과제를 수행하기 위해 정보를 추구하는 과정이라는 한정된 맥락에서 보이는 개별적인 감정과 행태의 특성을 발견하는 것이다. 과제 수행이라는 일종의 강제된, 동일한 맥락에서 개별적, 선택적으로 발생하는 개개인의 정보추구를 보다 깊이 이해하고자 시도하였다. 데이터는 문헌정보학 전공 4학년생 54명이 서술한 자기보고서를 내용 분석함으로서 수집하였고, 주요한 발견을 정보추구의 상황 인식과 감정, 정보추구의 장애요인, 정보추구의 과정과 전략 및 정보원의 이용이라는 측면에서 분석하였다.

• 의학교육논단
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• 제13권2호
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• pp.25-37
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• 2011

Purpose: Core competencies for becoming a good physician have been the focus of recent discussion. Understanding students' state of mind should be included in this analysis. Thus, the purpose of this study was to review recent research papers on subjective well-being in medical education and propose some suggestions. Methods: A selective search was conducted of the literature that has been published since 2000 in the Medline, Riss4U, ERIC, and KoreaMed databases using the search terms "happiness", "subjective well-being", "satisfaction", and "stress". Thirty seven studies were included in this review. Each was categorized according to 3 subjects (satisfaction, positive affect, negative affect). Results: Most studies showed relatively high levels of distress in medical students, which was related to academic worries. Although medical students were under a great deal of distress, they regarded help-seeking behavior for their distress as weakness or something negative. Conclusion: To decrease medical students' distress and sustain their well-being, there should be a change in students' awareness through curriculum, teaching methods, and coping strategies in medical education.

• Plant Biotechnology Reports
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• 제3권2호
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• pp.139-145
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• 2009

DNA methylation is known to play an important role in the regulation of gene expression in eukaryotes. In this study, we isolated NtMET1 from Nicotiana tabacum cv. Havana (SR1) and obtain transgenic plants that reduced MET1 expression level with the double-strand RNA (dsRNA) MET1 gene. Transgenic tobacco plants showed dwarf and abnormal flower development when compared with the wild type. Using methylation-sensitive amplified polymorphism (MSAP) analysis, the patterns of cytosine methylation in transformed plants and the wild type were compared. MseI/HpaII selection primers showed an interesting polymorphism, and 153 DNA bands of interest were detected. Among these, 30 selective fragments were sequenced and analyzed with a BLAST search by successful MSAP modifications. The homology search showed that the transposons and tandem repeated sequences were related to the phenotypes. These results suggested that the decreased degree of methylation by dsRNA strategy caused abnormal growth and development in N. tabacum.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2003년도 통신소사이어티 추계학술대회논문집
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• pp.20-23
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• 2003

A reduced-state sequence estimation(RSSE) for trellis-coded (TC) 8PSK/cyclic prefixed single carrier(CPSC) with minimum mean-square error-liner equalization(MMSE-LE) on frequency-selective Rayleigh fading channels is proposed. The Viterbi algorithm (VA) is used to search for the best path through the reduced-state trellis combined equalization and TCM decoding. The symbol error probability of the proposed scheme is confirmed by computer simulation.

• 한국멀티미디어학회논문지
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• 제21권3호
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• pp.369-381
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• 2018

Nowadays a personalization algorithm is gaining huge attention. It gives users selective information which is helpful and interesting in a deluge of information based on their past behavior on the internet. However there is also a fatal side effect that the user can only get restricted information on restricted topics selected by the algorithm. Basically, the personalization algorithm makes users have a narrower perspective and even stronger bias because users have less chances to get views of opponent. Eli Pariser called this problem the 'filter bubble' in his book. It is important to understand exactly what a filter bubble is to solve the problem. Therefore, this paper shows how much Google's personalized search algorithm influences search result through an experiment with deep neural networks acting like users. At the beginning of the experiment, two Google accounts are newly created, not to be influenced by the Google's personalized search algorithm. Then the two pure accounts get politically biased by two methods. We periodically calculate the numerical score depending on the character of links and it shows how biased the account is. In conclusion, this paper shows the formation process of filter bubble by a personalization algorithm through the experiment.

• 한국통신학회논문지
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• 제33권1B호
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• pp.38-47
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• 2008

다양한 소프트웨어 기능들에 대해서 활발한 시장의 요구사항에 부응하기 위해서는 주어진 납기에 시스템시험을 마쳐야 한다. 특히, 사용자나 개발목표 시스템의 주요 핵심기능과 밀접한 주요 고장들은 시스템시험에서 반드시 검출, 제거되어야 한다. 대부분 제안되고 있는 시스템시험 방법은 효율적이고 가격 경쟁력을 갖춘 선택적인 시험 방법이 아닌 일상적인 방법이다. 이러한 방법들은 시스템 개발 초기나 단기간(short-term)의 효과적인 시험에 응용할 수 없으며, 새로운 기능의 추가에 따른 시험 준비에 많은 비용이 수반되므로 효과적인 시험이 되지 못한다. 이러한 문제를 극복하기 위한 새로운 시험방법으로 시험수행의 핵심적인 역할을 수행하는 선택적인 소프트웨어 시험이 필요하다. 선택적인 시험방법은 3가지 정보를 조합하여 시험항목 순위를 결정하는데 즉, 사용빈도, 시나리오 복잡도, 고장강도 등이다. 이 정보를 사용하여 시험을 수행함으로써 시스템의 치명적인 고장을 찾는데 활용함으로써 보다 효율적인 시스템 시험을 수행할 수 있다. 본 논문에서는 주요기능과 관련된 심각한 오류와 시스템의 치명적인 결함을 찾는 선택적인 소프트웨어 시험 방법에 대해 제안된 방법을 적용, 그 결과를 검증한다.

• 한국실내디자인학회논문집
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• 제24권2호
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• pp.125-133
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• 2015

Gaze induction characteristics in space vary depending on characteristics of spatial components and display. This study analyzed dominant eye-fixation characteristics of three zones of department store space. Eye-fixation characteristics depending on spatial components and positional relationship can be defined as follows. First, [**.jpg] was used as an extension in the process of storing the image photographed during image data processing for analysis in pixels and due to compressed storage of image data, the image produced with a clear boundary was stored in neutral colors. To remove this problem, the image used in operation was re-processed in black and white and stored in the [**.bmp] format with large capability, at the same time. As the result, the effort caused by unnecessary colors in the program operation process was corrected. Second, the gaze ratio to space area can be indicated as a strength of each gaze zone and when analyzing the gaze strength of the three zones, the left store was a zone with a "little strong" gaze strength of "102.8", the middle space was a zone with an "extremely weak" gaze strength of "89.6" and the right store was a zone with an "extremely strong" gaze strength of "117.2". Third, the IV section had a strong strength of gaze on the middle space and the right store and the V section showed a markedly strong strength of gaze on the left and right stores. This tendency was the same as the VI section with the strongest gaze strength and the right store had a little strong gaze strength than the left store.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제5권10호
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• pp.1862-1878
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• 2011

With the advances in wireless communication technology and the advent of smartphones, research on location-based services (LBSs) is being actively carried out. In particular, several spatial index methods have been proposed to provide efficient LBSs. However, finding an optimal indexing method that balances query performance and index size remains a challenge in the case of wireless environments that have limited channel bandwidths and device resources (computational power, memory, and battery power). Thus, mechanisms that make existing spatial indexing techniques more efficient and highly applicable in resource-limited environments should be studied. Bitmap-based Spatial Indexing (BSI) has been designed to support LBSs, especially in wireless broadcast environments. However, the access latency in BSI is extremely large because of the large size of the bitmap, and this may lead to increases in the search time. In this paper, we introduce a Selective Bitmap-based Spatial Indexing (SBSI) technique. Then, we propose an Adaptive Bitmap-based Spatial Indexing (ABSI) to improve the tuning time in the proposed SBSI scheme. The ABSI is applied to the distribution of geographical objects in a grid by using the Hilbert curve (HC). With the information in the ABSI, grid cells that have no objects placed, (i.e., 0-bit information in the spatial bitmap index) are not tuned during a search. This leads to an improvement in the tuning time on the client side. We have carried out a performance evaluation and demonstrated that our SBSI and ABSI techniques outperform the existing bitmap-based DSI (B DSI) technique.

• 한국정보통신학회논문지
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• 제18권9호
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• pp.2209-2215
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• 2014

본 논문은 DOI방법을 개선한 디인터레이싱 방법을 제안한다. DOI방법은 강력한 인트라필드 기반의 디인터레이싱 기술이지만 긴 연산시간과 주기적인 패턴에서 방향을 잘못 찾는 문제를 가지고 있다. 이 문제를 해결하기 위해 기존의 전역검색 대신하여 2단계 검색을 하여 연산속도를 향상시키고 두 가지 과정을 추가하여 영상의 화질을 개선하는 방법을 제안한다. 첫 번째 단계로 잘못된 방향으로 찾은 공간벡터를 삭제하며 두 번째 단계로 찾지 못한 방향에 대한 공간 방향벡터를 삽입함으로써 제안된 방법에서 잘못 찾은 공간 방향벡터를 정확한 결과인지 재확인하여 픽셀의 보간에 사용할지 검사한다. ISO 실험 이미지를 이용하여 제안된 방법과 line evarage, edge-based line averaging, DOI, selective deinterlacing algorithm 등의 기존의 방법을 비교한 결과 제안된 방법이 객관적으로나 주관적으로 우 수하다는 것을 보였다.