• Korean Journal of Geomatics
• /
• v.3 no.2
• /
• pp.87-91
• /
• 2004

Surveying and GIS have increasingly contributed to improve the quality of humane life through the development of its technology. While the surveying professions are now experiencing the crisis of identity. In this paper, we aim to study the concepts and presence of newly used terminologies, present state and future vision of surveying and GIS in Korea. To cope with various surveying consumers for expanding the market and their demands, enhancement of educational system, complement of laws legal system, construction of cooperative system in business are basically required.

• Proceedings of the IEEK Conference
• /
• 2003.07e
• /
• pp.1779-1782
• /
• 2003

본 논문에서는 새로운 색역폭(color gamut) 매핑 방법을 이용하여 디지털 TV 디스플레이 장치의 화질을 개선하는 방법을 제안하였다. 기존에 실시간 적응이 어렵던 색역폭 매핑 방법을 실시간으로 처리하기 위한 하드웨어 구조를 제안하였으며 이를 통하여 수 나노 초 단위의 처리 속도가 필요한 디지털 TV 의 디스플레이 장치에 성공적으로 적용이 가능하였다. 또한 제안된 하드웨어 구조는 필요에 따라 색역폭 매핑 해상도의 조절이 가능하여 해상도 및 하드웨어 구현 비용을 적절히 조절할 수 있는 장점이 있다.

• Proceedings of the Korean Society of Broadcast Engineers Conference
• /
• 2002.11a
• /
• pp.183-186
• /
• 2002

본 논문에서는 신호의 마스킹 특성을 이용한 Inter-Band Smoothing 기법을 통한 음질 개선 연구를 하였다. 이것은 임계 대역 신호 처리 후 신호의 전체 신호 대 마스킹 비를 보상해 주는 방식으로, 각 대역의 여기(Excitation) 에너지로부터 근사화 시킨 전역 마스킹 임계치를 통한 보상 기법이다. 잡음 에너지 제어를 통한 음질 개선알고리즘을 이용한 실험 결과 보다 자연스러운 음질의 제공을 통해 MOS의 개선을 확인 할 수 있었다.

• Journal of Educational Research in Mathematics
• /
• v.9 no.1
• /
• pp.239-244
• /
• 1999

This study aims to present the necessity of 'mathematics for teacher' and advices for enhancing professionalism of mathematics teacher. Many mathematics teachers don't know formula giving roots of cubic and quartic equation which is presented as a example of mathematics for teacher, but they feel the necessity of professional knowledge like mathematics for teacher. As the role of mathematics teachers changes, professionalism in various fields is required. That is, they must be equipped with the belief and attitude as a professional and understand the content of mathematics for teacher and mathematics education theory. After all, loaming mathematics depends on the quality of mathematics teacher.

• Proceedings of the Korean Information Science Society Conference
• /
• 2003.10c
• /
• pp.280-282
• /
• 2003

SCTP (Stream Control Transmission Protocol)은 신뢰성있는 스트림 전송을 위해, 기존의 전송 프로토콜로 사용되어온 TCP/UDP 프로토콜의 장점을 살린 차세대 전송프로토콜 기술로, IETF SIGTRAN에서 개발한 표준이다. RFC 2960(SCTP)는 신뢰성 있는 데이터 전송이 기존의 전송프로토콜에 비해 뛰어나다는 평가를 받고 있다. 본 논문에서는 이러한 SCTP의 신뢰성을 바탕으로 에러 발생시 에러를 지각하고, 이를 기반으로 향상된 멀티미디어 서비스 품질을 제공할 수 있는 시스템과 그 방법에 대해 제안한다.

• Proceedings of the IEEK Conference
• /
• 2002.06d
• /
• pp.251-254
• /
• 2002

Currently many devices reproduce electronic images in a variety of ways. However, the colors that are reproduced are different from the original color due to the differences in the gamut between devices. In this paper, a gamut mapping method utilizing a simultaneous mapping function and a lightness rescaling is proposed. This method enhance the local-color characteristics and lightness contrast. The experimental result shows that the overall contrast and the colorfulness were increased.

• Journal of the Korean Society for Precision Engineering
• /
• v.17 no.1
• /
• pp.185-191
• /
• 2000

Direct ＆ adaptive slicing of sculptured surfaces in RP improves, quality ＆ accuracy of the final product, compared to the slicing with uniform layer thickness or the slicing of facets (ie, STL). Present D＆A slicing procedures adaptively compute the next layer thickness based on the surface information of current sliced contour, which assumes constant normal curvature values. In some cases, however. such assumption leads to intolerable slicing result which cannot correctly consider the entire local feature shape. We propose improved adaptive slicing algorithms which can determine near-optimal layer thickness, including illustrated examples.

• Proceedings of the Korean Institute of Surface Engineering Conference
• /
• 2012.05a
• /
• pp.154-155
• /
• 2012

In this work, we report the comprehensive study of performance enhancement of InGaAs n-MOSFET by plasma $PH_3$ p assivation. The calibrated plasma $PH_3$ passivation of the InGaA ssurface before CVD high-k dielectric deposition significantly improves interface quality, resulting in suppressed frequency dispersion in C-V, increase in drive-current with high electron mobility, and excellent thermal stability.

• Proceedings of the Korean Institute of Building Construction Conference
• /
• 2021.11a
• /
• pp.150-151
• /
• 2021

This study aims to achieve an enhancement in the quality of high strength concrete through a reduction in autogenous shrinkage by supplying the moisture needed for hydration through recycled aggregates that retain high amounts of moisture. The result showed that, moisture supply increased with the higher replacement rate, autogenous shrinkage dropped by up to 45 percent.

• Journal of Korean Society for Geospatial Information Science
• /
• v.22 no.4
• /
• pp.81-89
• /
• 2014

In Korea, National spatial data infrastructure has implemented in order to integrated manage and share the national spatial information producted by public agencies and local governments. The necessities of systematic quality management are raised, because information, which is generated by different agencies, is integrative managed by national level. In this paper, the establishment of BPR(Business Process Reengineering) for national spatial data infrastructure quality management system. Quality management business is defined as quality management object definition, quality measuring, evaluation and analysis, and quality enhancement process. Next, activities for each process are designed. For the quality management business, business rule(BR) is required for determining error. We derive the BR for six objects(legal-dong, railway boundary, railway centerline, road boundary, road centerline, building) among the basic spatial information. Other information's BR can be generated by using the derivation method described in this paper. Based on the BPR of this paper and derived BR, national spatial data infrastructure quality management system can be implemented in the future.