• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2023.11a
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• pp.127-128
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• 2023

해양수산 연구개발사업으로 추진하고 있는 "초고속해상무선통신망 무선설비 다각화 및 통신연계 기술개발"은 LTE-M. 무선설비 다각화 개발, 선내 극한환경 대응 무선 M-IoT 기술개발, 선박 M-S2X 기술개발 및 통신망 품질검증 객관화 고도화 연구로 구분되어 추진되고 있다. 해당 논문을 통하여 관련 주요 추진성과를 공유하고 향후 계획을 제시하고자 한다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.36 no.11C
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• pp.655-661
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• 2011

The transmission issues for the scalable video coding extension of H.264/AVC (H.264 SVC) video has been widely studied. In this paper, we propose an objective video-quality assessment metric based on no-reference for H.264 SVC using scalability information. The proposed metric estimate the perceptual video-quality reflecting error conditions with the consideration of the motion vectors, error propagation patterns with the hierarchical prediction structure, quantization parameters, and number of frame which damaged by packet loss. The proposed metric reflects the human perceptual quality of video and we evaluate the performance of proposed metric by using correlation relationship between differential mean opinion score (DMOS) as a subjective quality and proposed one.

• 한국IT서비스학회:학술대회논문집
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• 2005.11a
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• pp.311-318
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• 2005

최근 정보 시스템의 기능이 복잡화, 거대화하고 있는 추세에 따라 감리인이 수작업으로 시험시나리오를 작성하고, 검증시험을 실시하는 것은 매우 비효율적이라고 할 수 있으며, 결과로 얻어진 증적 자료는 신뢰성 및 객관성 면에서 한계를 가지게 된다. 정보시스템 감리의 시험단계에 대하여 적정한 시험도구를 도입 ${\cdot}$ 적용함으로써 감리 시행의 효율성을 제고하고 정량적인 판단 근거를 제시하여, 감리 의견의 신뢰성 및 일관성을 확보하는데 도움이 될 수 있다. 본 연구에서는 감리서비스요인이 감리품질과 감리성과간의 관계에 미치는 영향과 이들과 자동화 도구 적용의 적합관계를 규명하고, 나아가서 감리품질과 감리성과간의 관계를 규명하고자 하였다. 연구결과, 자동화 도구가 감리품질에 유의한 영향요인이며, 또한 감리품질은 감리성과에, 그리고 자동화 도구의 적용이 감리성과에 유의한 영향을 미치는 것으로 밝혀졌다.

• 한국IT서비스학회:학술대회논문집
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• 2010.05a
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• pp.452-457
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• 2010

정보시스템 운영은 연속성, 장애에 대한 민감성 등 정보시스템 구축과는 다른 특성을 많이 가지고 있어 감리방법에 있어서도 새로운 방법이 필요하다. 본 논문은 정량화된 운영점검표를 제시함으로써, 운영감리의 객관성과 신뢰성을 확보하고, 감리결과를 정량화하며, 타 운영사례나 과거 운영 상태와의 비교를 가능케 하여, 감리의 품질과 운영감리의 효용성 향상에 기여하고자 하였다. 시스템 운영 정보시스템 감리지침의 기본점검항목을 기준으로 13가지 기본점검항목을 도출하였고, 각 기본점검항목 별로 현재 운영상태가 어떤 수준인지를 평가할 수 있도록 하였으며, 전문가 인터뷰와 현장적용을 통하여 검증하였다.

• Annual Conference on Human and Language Technology
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• 1996.10a
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• pp.98-104
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• 1996

일반적으로 비선형 형태 정규화 과정은 필기체 문자에서 발생하는 형태 변형을 보상하기 위하여 사용되며, 현재까지 이진 영상에 대한 비선형 형태 정규화 방법들이 제안되었다. 그러나 현존하는 대부분의 문자 인식 시스템은 스캐너를 통하여 입력된 명도 문자영상을 이진화하여 사용하고 있기 때문에 이진화로 인해 야기되는 물자 영상에 대한 정보 유실 및 잡영 첨가 현상이 비선형 형태 정규화 과정에 누적되어 결과적으로 좋은 특징 추출 결과를 기대하기 어려운 실정이다. 본 연구에서는 이진화에 의한 정보의 손실을 최소화시키고, 필기체 문자에서 발생하는 다양한 형태 변형을 효과적으로 보상할 수 있는 명도 영상에서의 비선형 형태 정규화 방법을 제안한다. 제안된 명도 영상에서의 비선형 형태 정규화 방법들의 성능을 객관적으로 검증하기 위하여 처리 시간 및 복잡도 등을 기준으로 평가하였으며, 다양한 명도 한글 글씨 데이터에 대한 실험을 통하여 이진 영상에서의 비선형 형태 정규화 방법에 비해 제안된 방법이 변형이 심한 한글 글씨 데이타의 품질을 개선하는데 있어서 매우 효율적임을 확인할 수 있었다.

• Journal of Digital Convergence
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• v.17 no.4
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• pp.137-147
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• 2019

This paper studies the effect of content information quality of u-tourism information system on flow theory and satisfaction. The purpose of the research is to generate and propose flow-related information to satisfy tourists with content information quality. The meaning of this paper is to derive success factors for verifying satisfaction of content information quality to tourists, establish hypotheses as research models, and evaluate verification. The differentiation of this study is the design implementation of u-fusion tourism information system by combining flow relation information with flow theory. The contribution of this paper is the generation of flow related information and the elicitation of success factors of contents quality of u-tourism information system. The advantage is that tourists can be patterned by symbolization and the pattern can be illustrated. The limitations of this paper are limited to small areas, and the lack of objectivity is required and future tasks are needed to compensate for them.

• Journal of Korean Society of Archives and Records Management
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• v.19 no.3
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• pp.123-153
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• 2019

The study aims to develop and verify evaluation factors and items for assessing the quality when digitizing intangible cultural heritage record information resources. To derive evaluation areas and factors, the study analyzes the digitalization cases of the National Intangible Heritage Center and International Information and Networking Centre for Intangible Cultural Heritage in the Asia-Pacific region (ICHCAP) under the auspices of UNESCO, along with digitalization-related guidelines, National Archives of Korea standards, and previous studies. Afterward, to select the importance of evaluation factors and items developed, the study conducted a survey on working-level officials of intangible cultural heritage-related organizations and those working on digitalization, and established an allocation system based on the selected importance. Furthermore, the study performed a pilot evaluation by applying it to a digitalized intangible cultural heritage record information resources and conducted a focus group interview (FGI) to verify the results of the evaluation. Through the evaluation factors and items developed in this study, the agency can objectify the deficiencies of digitalization at a glance and use them as basic data by practitioners in the future.

• Food Science and Preservation
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• v.16 no.2
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• pp.204-210
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• 2009

This study investigated consumer grape recognition and preference, to improve grape quality. The questionnaire explored consumption frequency, purchasing locations, amounts purchased, general preferences, seedless/seeded preference, and external/internal quality factors. Answers to 519 questionnaires were analyzed both descriptively and quantitatively using SPSS for Windows(Version 14.0). The principal results were as follows: 46.1% of respondents purchased at wholemarket; 38.5% purchased 3-5 bunches at any one time; 76% preferred grapes to other fruits; and 49.8% purchased bigger(and not smaller) grapes. Most customers preferred seedless grapes. The most important external quality factor was bunch fullness and the most significant internal factor was sweetness.

• Journal of the Korean Wood Science and Technology
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• v.47 no.2
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• pp.229-238
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• 2019

Various wood defects occur during tree growing or wood processing. Thus, to use wood practically, it is necessary to objectively assess their quality based on the usage requirement by accurately classifying their defects. However, manual visual grading and species classification may result in differences due to subjective decisions; therefore, computer-vision-based image analysis is required for the objective evaluation of wood quality and the speeding up of wood production. In this study, the SIFT+k-NN and CNN models were used to implement a model that automatically classifies knots and analyze its accuracy. Toward this end, a total of 1,172 knot images in various shapes from five domestic conifers were used for learning and validation. For the SIFT+k-NN model, SIFT technology was used to extract properties from the knot images and k-NN was used for the classification, resulting in the classification with an accuracy of up to 60.53% when k-index was 17. The CNN model comprised 8 convolution layers and 3 hidden layers, and its maximum accuracy was 88.09% after 1205 epoch, which was higher than that of the SIFT+k-NN model. Moreover, if there is a large difference in the number of images by knot types, the SIFT+k-NN tended to show a learning biased toward the knot type with a higher number of images, whereas the CNN model did not show a drastic bias regardless of the difference in the number of images. Therefore, the CNN model showed better performance in knot classification. It is determined that the wood knot classification by the CNN model will show a sufficient accuracy in its practical applicability.

• Korean Journal of Construction Engineering and Management
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• v.16 no.4
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• pp.98-106
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• 2015

VE aims at reduction in a budget, improvement of function, structural safety and quality security for public construction projects. However, there is possibility for the structural safety and quality security review to be insufficient because related regulations are mostly composed of analysis on economic efficiency of design. In addition, due to the misconception about VE as a cost saving methodology, an alternative is being presented which still focuses mainly on cost saving, but with no objective evaluation of function related to cost. In order to improve this, the government adopted the reduction of life cycle cost and proposal of value improvement, and let people specify the cost and function of the original plan versus the alternative plan, and the value changes between them. However, it is written mainly into practical convenience rather than theoretical basis since a specific way is not suggested. The current method sets a different starting point by applying the attributional difference of function and cost. Furthermore, an evaluation standard for correlating is an important element in rational decision making for assessing and choosing an alternative. This paper analyzes the process and method of function & cost scoring when performing VE and suggests a mathematical normalization model in order to support rational decision making when selecting an optimum plan.