http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
초·중·고 학생들의 과학 탐구 능력 추이 분석을 위한 종단적 연구
우종옥,김범기,허명,김찬종,양일호,최관순,김태선 한국교원대학교 과학교육연구소 1999 청람과학교육연구논총 Vol.9 No.1
본 연구에서는 우리 나라 초·중·고등학교 학생들의 과학 탐구 능력에 대한 종단적 추이를 분석하였다. 1997년에는 우종옥 등(1998)이 개발한 검사지를 사용하였으며, 1999년에는 이를 일부만 수정하여 사용하였다. 조사 대상은 성별, 지역별 등을 고려하여 표집하였다. 조사된 자료는 각각 횡단적으로 분석하고, 이를 바탕으로 학생들의 과학 탐구능력이 어떻게 변해 가는지 종단적 추이를 분석하였다. 조사 결과 초등학생들의 과학 탐구 능력은 유의미한차이가 없었으나, 중·고등학생들의 과학 탐구 능력은 유의미하게 향상된 것으로 나타났다. 학교 과학 교육의 질을 과학적으로 관리하기 위해서는 교육과정이 추구하는 교육 목표의 달성이 성공적으로 이루어지고 있는지를 국가수준에서 주기적으로 측정하여 부진의 원인을 진단하고, 개선 방안을 계속 연구하여야 할 것이다. The longitudinal trend of elementary and secondary students' science process skills were investigated to monitor the progress of science learning. Science process skill test, developedin an earlier study on developing a national science process skills assessment system, was revised and administered for the study on March, 1999. Subjects were sampled nation wide according to sex and region. The results of this assessments were compared to those administered on February, 1997. The results showed little difference on science process skills among elementary school students. However, secondary students showed marked increase in science process skills. More systematic and long-term research for assessing science process skills should be planned and performed periodically to provide empirical and foundational data for educational policy making.
인간 시각 특성을 고려한 DTV 비디오 테스트 패턴 연구
한찬호,박양우,윤태진 경운대학교 산업기술연구소 2001 産業技術硏究論文誌 Vol.3 No.2(C)
For DTV development and testing, we propose composite a video test pattern considering human visual characteristics and compress to stream. In this paper, we use the SMPTE 274M for video input format. And we compose verity analog video test pattern and develop digital video test pattern. We propose MPEG-2 MP@HL compression algorithm for proposed still picture sequence maintaining above 40dB picture quality. Finally we test several DTV using proposed video test pattern.
와전류검사에 의해 검출된 증기발생기 전열관의 균열 특성
조찬희,남민우,김영호,양승한,이희종 한국비파괴검사학회 2004 학술대회 논문집 Vol.- No.-
The flaws detected at the steam generator tube of the Nuclear Power Plant are the wear indications by anti-vibration bars and circumferential cracks at the top of the tubesheet. It is easy to detect and size wear indications. Also the wear indications are commonly found at the steam generator tubes. However, the steam generator tube which includes crack indication is plugged because it is very difficult to predict the growth rate and the sizing error is high. The motorized rotating pancake coil has been used for the detection of circumferential crack since it is not possible to detect using the conventional bobbin probe. This paper describes the characteristics for the circumferential crack at the steam generator tubes of the Korean Standard Nuclear Power Plants.
위상 및 음압 레벨제어를 이용한 스테레오 음상 확대에 관한 연구
한찬호,박양우,장주석 경운대학교 산업기술연구소 2001 産業技術硏究論文誌 Vol.3 No.2(A)
Three-dimensional sound is a technique for generating or recreating sounds so they are perceived as emanating from locations in a three-dimensional space. Three dimensional sound has the potential of increasing the feeling of realism in music or movie soundtracks. Three-dimensional sound effects depend on psychoacoustic spectral and phase cues being presented in a reproduced signal. In this paper we propose an effective algorithm for the sound image expansion in television system using stereo image enhancement techniques. In this algorithm, a lower frequency band sound is expanded by phase control and a higher frequency band sound is expanded by cross-talk cancelation. Compared to the other techniques of three-dimensional sound, the proposed algorithm use only two speakers to enhance the sound image expansion, while maintaining the original sound characteristics.
균일한 색 변화를 위한 밝기 사상과 최대 채도 재현을 위한 색역사상
박양우,윤태진,한찬호 경운대학교 산업기술연구소 2001 産業技術硏究論文誌 Vol.3 No.2(C)
In this paper, luminance mapping for uniform color distribution and gamut mapping for maximum chroma reproduction are proposed. In the conventional lightness mapping, the average lightness difference between the two gamut is increased and different color changes in bright and dark regions are also increased. TO solve these problems, a lightness mapping is proposed that minimizes the lightness difference of the cusps at each hue angle and produces same color changes in bright and dark regions. Also, chroma mapping that utilize variable anchor point and an anchor point are proposed for maximum chroma reproduction and uniform color change. The proposed algorithm reduce a sudden color change on the gamut boundary of the printer and to maintain a uniform color change during the mapping process. Accordingly, the proposed algorithm can reproduce high quality images with low-cost color devices.
고추 탄저병 저항성 중간모본 ‘원예 100005호 ’,‘원예 100006호’ 육성
양은영,김수,채영,채수영,조명철,문지혜,박태성,이우문,곽정호 忠北大學校 農業科學硏究所 2015 農業科學硏究 Vol.31 No.2
Owing to frequent heavy rain due to abnormal weather, the occurrence of pepper anthracnose has recently increased, which affects the supply and demand of pepper. As a result, the price of red pepper powder in 2011, for example, increased three times compared to the average year. Although anthracnose of pepper plants has been controlled by fungicides until now, it is important to develop new resistant cultivars because of the reduction of the labor force in rural area and occurrence of new anthracnose strains resistant to fungicides. National Institute of Horticultural and Herbal Science developed two pepper lines, ‘Wonye 100005’ and ‘Wonye 100006’ that are resistant to pepper anthracnose. These lines were developed by continuous selection of progenies from a cross between ‘Wonye AR1’, which were developed from interspecific hybridization and ‘TF68’. The anthracnose resistance level of the two lines was higher than that of commercial cultivars and similar to check varieties showing highest level of anthracnose resistance.
보안성향상과 네트워크 부하감소를 위한 Jini 기반 SNMP 시스템 설계 및 구현
윤태진,박양우,한찬호 경운대학교 산업기술연구소 2001 産業技術硏究論文誌 Vol.3 No.2(B)
Web-based SNMP and CORBA-based SNMP have been studied as a standard of network management technology in distributed environment. Jini can be used to build robust and reliable networks without modification to any platforms as network plug & play protocol. In this paper, we design and implement Jini-based SNMP system. This system has manager, agent, and lookup service, and communicates each other via Java RMI. The manager supervises networks by user interface component, the agent takes a various task of network management, and the lookup service links manager to agents dynamically. Security and portability are enhanced using JAVA, and communication overheads can be decreased by excluding pollings of servers.
NK/T 세포 림프종 환자에서 시행된 비골수제거성 조혈모세포이식
정준원,김진석,장준호,서형찬,이승태,김현옥,양우익,민유홍,한지숙,고윤웅 대한조혈모세포이식학회 2001 대한조혈모세포이식학회지 Vol.6 No.2
저자 등은 맹장, 충수돌기 및 흉막을 침범한 고위험군 NK/T 세포 림프종 환자에서 비골수제거 조혈모세포이식을 시행한 후 이식연관 합병증 없이 무병생존하였기에 보고하는 바이다. NK/T cell lymphoma is a rare type of non-Hodgkin"s lymphomas. It has the histological features of angiocentric lymphoma characterized by prominent angio-invasion by tumor cells, and commonly presents in nasal and paranasal structures. Non-nasal form of NK/T cell lymphoma involves skin, gastrointestinal tract, or liver. With conventional chemotherapy and/or radiotherapy, NK/T cell lymphoma shows poor response rate and seldom results in long term survival. Especially, non-nasal form has more aggressive clinical manifestations and grave outcome than nasal form. We report a case of NK/T cell lymphoma presenting with small bowel perforation and malignant pleural effusion due to lymphoma infiltration, transplanted with allogeneic peripheral blood stem cells from HLA identical sibling donor after fludarabine-based nonmyeloablative chemotherapy. After transplantation, the patient achieved an enduring tri-lineage hematological complete response without any evidence of relapse for 10 months.
Compact & Contact Quad-Band(DVB-H UHF/L, WLAN 11 a/b) Antenna for PMP Applications
Yang, Chan-Woo,Yeum, In-Su,Jung, Chang-Won The Korean Institute of Electromagnetic Engineerin 2010 Journal of Electromagnetic Engineering and Science Vol.10 No.3
The quad-band antenna, which is composed of two compact dual-band antennas, is presented for potable media player(PMP) applications. The antenna for the broadcasting dual-band(DVB-H UHF; 470-862 MHz, L; 1452-1492 MHz) is composed of a planar inverted F-shaped antenna(PIFA) with an input matching circuit. The antenna for the communication dual-band(WLAN 11 b; 2.4~2.5 GHz, 11 a; 5.15~5.8 GHz) is composed of a folded dipole antenna with enhanced mutual coupling. The proposed antennas are contact with the PMP case($\varepsilon_r$=3.2) which is used as a substrate for the compact design.