• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2007년 가을학술발표회
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• pp.431-439
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• 2007

Data logger is generally needed for gathering field information automatically(or manually), using various sensors. However it, currently used in the county, is produced and developed by overseas. It is difficult to upgrade related program due to developed system and limited user in terms of environment it is used. On the other hand, several companies developed and sold unique data logger based their technique expertise in the country. But enhancement and practical use of related technology has much difficulties because feasibility, marketability and demand for technique are uncertain. In this study, it is the main purpose to offer basic information to select equipment suitable for field characteristic through analysis and comparison with features about method of information collection, operating program and process technique data logger which is used primarily in geotechnical engineering in both domestic and international.

• 산업경영시스템학회지
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• 제17권30호
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• pp.125-133
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• 1994

In this paper we studied the field tracking and feedback systems of NTT in Japen and AT&T in the U.S. Then we would like to suggest an effective field quality information system for Korea Telecom, the biggest telecommunication company in Korea.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제6권9호
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• pp.2351-2369
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• 2012

This paper describes interpolation method of motion field in the Wyner-Ziv video coding (WZVC) based on Expectation-Maximization (EM) algorithm. In the EM algorithm, the estimated motion field distribution is calculated on a block-by-block basis. Each pixel in the block shares similar probability distribution, producing an undesired blocking artefact on the pixel-based motion field. The proposed interpolation techniques are Bicubic and Lanczos which successively use 16 and 32 neighborhood probability distributions of block-based motion field for one pixel in k-by-k block on pixel-based motion field. EM-based WZVC codec updates the estimated probability distribution on block-based motion field, and interpolates it to pixel resolution. This is required to generate higher-quality soft side information (SI) such that the decoding algorithm is able to make syndrome estimation more quickly. Our experiments showed that the proposed interpolation methods have the capability to reduce EM-based WZVC decoding complexity with small increment of bit rate.

• 한국전자파학회논문지
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• 제28권1호
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• pp.61-68
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• 2017

본 논문에서는 저주파 대역에서 동작하는 무선전력전송 시스템에서 발생하는 자기장을 저감하기 위한 개선된 자기장 저감 구조를 제안하였다. 제안된 구조는 자성체와 도체로 구성되었으며, 적용된 다양한 설계 파라미터를 최적화하여 전력전송을 위한 자기장의 상쇄효과는 최소화 하면서 시스템 주변으로 누설되는 자기장 상쇄효과는 개선되도록 하였다. 무선전력전송 시스템의 효율과 주변으로 누설되는 자기장 저감 효과를 컴퓨터 시뮬레이션과 측정을 통하여 분석 및 검증을 하였다. 시뮬레이션 분석 결과, 제안된 구조가 적용된 무선전력전송 시스템의 전력전송효율은 약 77 % 수준으로 기존의 전력전송효율과 동등한 수준을 유지하였다. 또한, 고효율을 유지하는 구조들과 비교하여 최대 근접지점에서 누설되는 자기장의 세기를 약 29~37 % 저감할 수 있었다.

• 한국정보과학회논문지:소프트웨어및응용
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• 제32권7호
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• pp.636-649
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• 2005

분야연상어는 어휘자체가 분야정보를 가지므로 인간이 분야를 인지할 때와 유사하게 문서의 분야를 판단한다. 한국어의 경우 180분야로 분류된 약 IS,000개의 문서뱅크를 수집하여 구축 $\cdot$실험한 결과 88,782개의 단일 분야연상어가 8,405개로 전체의 약 9$\%$로 압축되며, 재현율 0.77 이상(평균 0.85), 정확률 0.90 이상(평균 0.94)의 높은 추출 정밀도를 얻었다. 구축한 분야연상어를 문서분류의 초기결정에 적용하여 인간에 의한 분야결정과 비교한 결과 약 90$\%$이상의 정답률을 얻었다. 연구결과를 문서분류의 초기단계에 관한 기초연구로 이용하고, 다언어(multilingual) 간의 문서검색에 적용하여 다국어 정보검색에 대한 기초 연구로 이용할 수 있다.

• 한국도서관정보학회지
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• 제38권4호
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• pp.299-323
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• 2007

이 글은 '정보봉사'라는 용어의 사용을 사례로 하여 우리 문헌정보학계의 전문용어 사용과 관련된 개념적 모호성과 허구성을 드러내 보이고 있다. 구체적으로 우리 학계가 참고봉사를 대체하는 용어로 사용하고 있는 '정보봉사'의 역사를 추적하면서, 우리의 정보봉사가 사용 당위성의 근거로 삼고 있는 미국의 'information services'와 실질적으로 어떠한 차이가 있는지에 대해 각자의 역사와 이론적 기반을 비교하면서 분석하고 있다. 이 과정에서 현재 우리 강단에서는 정보봉사라는 용어가 어느 정도 사용되고 있으며 지적 토대가 되는 이론적 영역을 무엇이라고 판단하고 있는지, 더불어 우리 도서관에서는 정보봉사를 어떠한 의미로 이해하면서 관련 업무를 수행하고 있는지 등에 대해 논의하고 있다. 이 글의 궁극적인 목적은 '정보봉사'라는 용어의 사용이 단순한 외양의 모방이 아닌 속내의 변혁을 동반하는 실질적인 패러다임의 변환으로 이어지도록 우리 학계의 노력을 촉구하는데 있다.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2009년도 춘계학술대회
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• pp.517-520
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• 2009

This dissertation was aimed at finding an implication of selecting and educating the gifted of information science discovering features of gifted learner in the field of math and science and the gifted of information science through comparative analysis of observing evaluation for the gifted of information science. Subjects of the study are foundation course learners of University Science Education Institute for the Gifted in the field of physics, earth science, math, information science. We have compared the features of learners of each field through one-way ANOVA about an observing evaluation for one year. In consequence, information science learners showed mostly different features from physics and earth science learners in details of an attitude area and a problem solving area. On this, the researcher concluded that there must be features of the gifted on information science and their difference from gifted learners in math and science was caused by learner levels and features of each field. Based on the result of this study, we expect that we can imply it to selecting and educating the gifted of information science.

• 한국컴퓨터정보학회논문지
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• 제22권7호
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• pp.83-91
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• 2017

In this paper, we propose a thorough solution for adjusting virtual sound field with different kinds of devices and software in preliminary procedure and late stage of music processing. The basic process of music production includes composing, arranging and recording at pre-production stage as well as sound mixing and mastering at post-production stage. At the initial stage of music creation, it should be checked whether the design of virtual sound field, the choice of the tone and the instrument used in the arrangement match the virtual sound field required for the final work. In later recording, mixing and mastering, elaborate adjustments should be done to the virtual sound field. This study also analyzed how to apply the parameter of the effectors to the design and adjustment of the virtual sound field, making it the source of our creation.

• 대한지구과학교육학회지
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• 제4권2호
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• pp.142-150
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• 2011

This study is aimed to offer the elementary school teacher's experience and awareness about science field trip and science museum field trip, by analyzing the survey of 867 students and 81 teachers in Seoul. Research shows 67.9% high figure of elementary school teacher's experience on science field trip. That experience is include 61.8% of science museum using experience. In case of elementary school teacher's pre-activity is only 53.1% and most of them was visiting Website. Post-activity is more than preceding activity(74.1%) but method is too simple like checking work sheets. 62.3% of elementary school students have been to science field trip and science museum that is higher than teachers'. 66.5% of students said science field trip is influence on science study in good ways but there are some difficulties like lack of pre-activity(33.0%) and unkind information about science museum(21.9%). For activation of science field trip, resources development for effective science field trip operating, program development for pre- and post-activity, school group science field trip program development which is linked science curriculum, complement and expand activity information of science field trip institution.

• Journal of Power Electronics
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• 제19권4호
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• pp.980-988
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• 2019

When compared with traditional power frequency generators, the frequency of a super high-speed permanent magnet generator (SHSPMG) is a lot higher. In order to study the influence of frequency on the electromagnetic field of SHSPMGs, a 60000rpm, 117kW SHSPMG was taken as a research object. The two-dimensional finite element model of the generator was established, and the two-dimensional transient field of the generator was simulated. In addition, a test platform of the generator was set up and tested. The reliability of the simulation was verified by comparing the experiment data with that of the simulation. Then the generator electromagnetic field under different frequencies was studied, and the influence mechanism of frequency on the generator electromagnetic field was revealed. The generator loss, voltage regulation rate, torque and torque ripple were analyzed under the rated active power load and different frequencies. The influences of frequency on the eddy current density, loss, voltage regulation rate and torque ripple of the generator were obtained. These conclusions can provide some reference for the design and optimization of SHSPMGs.