• 한국정보처리학회논문지
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• 제6권11호
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• pp.2954-2964
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• 1999

In this paper, we propose the model to measure and compare the performances of the Linux, PC_Solaris and FreeBSD which are the heterogeneous PC based UNIX kernels connected by network. Using the stop-watch timer with the $mutextrm{s}$ unit, we measure the important performance indices of UNIX kernels which are the primitive and command execution time and disk I/O time. Also we measure the message transfer time using the TCP, UDP and RPC methods to compare the network performance of UNIX kernels. And we compare the performance of NFS for each UNIX kernels. And we display the measured data on internet.

• Journal of information and communication convergence engineering
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• 제6권2호
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• pp.187-191
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• 2008

In the mobile environments for the vector map services, a map simplification work through the map generalization steps helps improve the readability of the map on a large scale. The generalization operations are various such as selection, aggregation, simplification, displacement, and so on, the formal operation algorithms have not been built yet. Because the algorithms require deep special knowledge and heuristic, which make it hard to automate the processes. This thesis proposes some map generalization algorithms specialized in mobile vector map services, based on previous works. This thesis will show the detail to adapt the approaches on the mobile environment, to display complex spatial objects efficiently on the mobile devices which have restriction on the resources.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2004년도 하계학술대회 논문집 D
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• pp.2690-2692
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• 2004

Medications or cognitive-behavior methods have been mainly used as a treatment of alcoholism. lately the virtualy technology has been applied to the kink of alcoholic disorders. A virtual environment makes him having ability to over come the drink. In this study, we were implemented by making panorama images and 3D object modules using 3D Studio MAX. VRML, JAVA Applet. And the BAR stimulator that composed with a position sensor head mount display, and audio system, is suggested. To illustrate the physiological difference between a person who has a alcoholism and and without a liquor bottle, heart rate was measured during experiment, and also measured a Person's HR after the virtual reality training. we demonstrated the subjective effectiveness of virtual reality psychotherapy through the clinical experiment.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2007년도 Proceedings of ISRS 2007
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• pp.508-511
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• 2007

Car navigation system is one of the most important applications in telematics. A newest trend of car navigation system is using real video captured by camera equipped on the vehicle, because video can overcome the semantic gap between map and real world. In this paper, we suggest a visual car navigation system that visually represents navigation information or route guidance. It can improve drivers' understanding about real world by capturing real-time video and displaying navigation information overlaid on it. Main services of the visual car navigation system are graphical turn guidance and lane change guidance. We suggest the system architecture that implements the services by integrating conventional route finding and guidance, computer vision functions, and augmented reality display functions. What we designed as a core part of the system is visual navigation controller, which controls other modules and dynamically determines visual representation methods of navigation information according to a determination rule based on current location and driving circumstances. We briefly show the implementation of system.

• 대한원격탐사학회지
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• 제23권5호
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• pp.365-373
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• 2007

Car navigation system is a key application in geographic information system and telematics. A recent trend of car navigation system is using real video captured by camera equipped on the vehicle, because video has more representation power about real world than conventional map. In this paper, we suggest a visual car navigation system that visually represents route guidance. It can improve drivers' understanding about real world by capturing real-time video and displaying navigation information overlaid directly on the video. The system integrates real-time data acquisition, conventional route finding and guidance, computer vision, and augmented reality display. We also designed visual navigation controller, which controls other modules and dynamically determines visual representation methods of navigation information according to current location and driving circumstances. We briefly show implementation of the system.

• 정보처리학회논문지B
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• 제18B권6호
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• pp.349-354
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• 2011

JPEG2000의 ROI 코딩에서, 사용자가 지정한 큰 이미지의 특정 영역은 우선적으로 처리되어야 한다. 왜냐하면, 전체 이미지를 나타내는데 많은 시간이 소모되기 때문이다. 사용자가 개략적인 이미지의 영역을 지정하면, 브라우저는 그 영역을 마스킹하고, 마스킹 정보를 서버로 전송한다. 마스크 정보를 전송받은 서버는 그에 해당하는 코드 블록들을 우선적으로 전송한다. 여기서, 마스크 정보의 빠른 생성이 중요하다. 이를 위해, 본 논문에서는 48개의 미리 정의된 마스크 패턴을 사용한다. 마스크 패턴은 마스킹된 영역을 빠르게 계산하기 위하여 ROI와 배경의 분포의 모양에 따라 미리 만들어져 있다. 기존의 방법인 ROI와 배경의 모양을 정확하게 나누어 처리하는 방법에 비해 품질은 아주 조금 떨어지지만 처리시간은 월등히 줄어졌음을 본 논문에서는 보인다.

• 한국의류학회지
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• 제47권1호
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• pp.73-84
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• 2023

This study aims to identify the current sizing communication issues of menswear on retail websites and to suggest an effective size information presentation method. Based on sales frequency and awareness in the Korean menswear market, 22 brand websites were selected, and size-related information was investigated using 7 types of representative apparel items. The current diverse types of size codes had limitations in delivering actual product size information. Many websites preferred to display garment dimensions rather than basic body measurements, which is the suggested size designation method in Korean Standard. The websites posted fit model photos and customer reviews. However, the body size specifications, which consumers can use as a useful reference, were often omitted. There was also a high uncertainty in product size selection, with only the basic body measurement information listed, and there was a high deviation of garment dimensions within the same basic body measurements. The product size distribution did not match actual Korean body types. Based on the findings, we suggested improved effective sizing communication methods. These methods will contribute to a better online shopping environment for both consumers and retail sellers.

• 전자공학회논문지
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• 제51권1호
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• pp.137-144
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• 2014

본 논문에서는 OLED 디스플레이에서 히스토그램 정합 기법을 통해 인지 화질을 고려한 파워 소모 저감 기법을 제안한다. 기존 방법의 경우 영상의 클리핑 에러를 정확하게 분석할 수 없어 클리핑 에러를 갖는 픽셀들이 집중된 경우 화질 저하가 크게 발생한다. 제안한 방법은 이를 해결하기 위해서 다른 특성을 갖는 여러 영상들에 대한 히스토그램들을 생성하고 각 영상에 대해 인지 화질을 고려한 최적의 클리핑 비율을 계산 및 데이터베이스에 저장한다. 이를 입력 영상에 대한 히스토그램과 정합도를 비교하여 최적의 클리핑 비율을 선택하여 출력 영상의 화질 저하를 막는다. 실험 결과 제안한 방법은 기존 방법 대비 평균 PSNR과 SSIM을 각각 최대 15.795 dB, 0.036 향상시킬 수 있었다.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2002년도 Proceedings of International Symposium on Remote Sensing
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• pp.66-69
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• 2002

This article outlines the capabilities of a viewer component called GridViewer, and proves its reusability. GridViewer was designed for the construction of the image display part of GIS or remote sensing application software, and consequently it is particularly straightforward to closely couple GridViewer with access to very large images. Displaying is performed through pyramid structure, which enables to treat very large dataset up to several gigabytes in size under the limited capability of PC. GridViewer is free from responsibility to handle various formats of raster data files by taking grid coverage, which is designed by OGC to promote interoperability between implementations done by data vendors and software vendors providing analysis and grid processing implementations. GridViewer differs from other such viewer by allowing for clients to extend its function and capability by using small set of methods originally implemented in it. We show its reusability and expandability by applying it in developing application programs performing various functions not supported originally by the GridViewer COM component.

• 한국언어정보학회지:언어와정보
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• 제13권1호
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• pp.1-20
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• 2009

Summarization is a complex cognitive task and its simulation is very difficult for machines. This paper presents an automatic summarization strategy that is based on a discourse categorization of the textual information. This categorization is carried out by the automatic identification of discourse markers in texts. We defend here the use of discourse methods in automatic summarization. Two evaluations of the summarization strategy are presented. The summaries produced by our strategy are evaluated with summaries produced by humans and other applications. These two evaluations display well the capacity of our application, based on EXCOM, to produce summaries comparable to the summaries of other applications.