• 한국통신학회논문지
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• 제36권6B호
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• pp.631-641
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• 2011

Digital Multimedia Broadcasting (DMB) and Internet Protocol Television (IPTV) are now in commercial service, tearing down the traditional boundaries between the telecommunications and broadcasting sectors. These latest developments also hold important implications for research projects in related areas. Both telecommunications and broadcasting being fields with a strong service orientation, market demand should be the primary consideration when selecting research and development (R&D) projects in these areas. This study presents a process for selecting converged telecommunications-broadcasting technology development projects from a demand-oriented perspective, using criteria that are based on projected future demand characteristics. Aimed at increasing the efficiency of the R&D project selection process in telecommunications and broadcasting convergence, this study can point out new directions in R&D management in this field.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1993년도 하계학술대회 논문집 B
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• pp.889-891
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• 1993

In order to perform the group control of motor drive systems in such as steel process line, high performance communication system is indispensible. In this paper, we introduce newly developed communication system which is suitable for these group control application. Using HDLC protocol, this system can transfer data to a long distance(up to 1km) at high speed(1Mbps) with reliability and efficiency. The performance of this communication system was proven through the application to the group control of DAEKYOUNG Bar Mill Line.

• Asian-Australasian Journal of Animal Sciences
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• 제11권6호
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• pp.732-738
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• 1998

Three crossbred gilts weighing $61{\pm}2kg$ ($mean{\pm}SD$) and three gilts weighing $52{\pm}3kg $ on the day before the first treatment began (d -1) were used for each of two experiments (Exp. 1 and Exp. 2), respectively. In Exp. 1, all pigs were fed the experimental diet (CP 19%) from d -7 to the end of study (d 21) to verify that nitrogen retention is constant during the 21 -d period. In Exp. 2, pigs were fed the control diet (CP 15.5 %) from d -7 to d 8 and then the low-lysine diet from d 9 to d 16 in order to determine how rapidly dietary changes in amino acid composition results in a new equilibrium for nitrogen metabolism. The amount of urine nitrogen loss was not different over 21 days (p > 0.10). Rates of nitrogen retention were not different among pigs (p > 0.10) nor over time (p > 0.10). Average nitrogen retention during the period was 1.00 g/kg $BW^{0.75}$ per day. The apparent biological value was 41%, which did not change over the 3-week period (p > 0.10). The overall efficiency of nitrogen use for nitrogen retention was 35% (Exp. 1). The amount of nitrogen loss in urine and the efficiency of nitrogen utilization for nitrogen gain reached a new equilibrium within 2 to 3 d after the diet was changed. The low-lysine diet resulted in a 20% increase of nitrogen loss in urine (p < 0.001) and a 9% decline in efficiency of nitrogen use for nitrogen retention (p < 0.001). Nitrogen retention while the pigs were fed the control diet was also higher than the retention when pigs were fed the low lysine diet (p < 0.001). The efficiency of nitrogen use for nitrogen retention in pigs fed the control diet was 57% (Exp. 2), which was higher (p < 0.001) than that from pigs fed the low-lysine diets (52%).

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2013년도 추계학술대회
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• pp.898-899
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• 2013

본 연구에서 사용되는 컨테이너 보안 장치의 전도성 대역에서 전도성 노이즈가 방출되는 현상을 전자파 저감 기술을 활용하여 측정 주파수 0.204MHz에서 40.3dBuV로 저감하여 컨테이너 보안장치의 전자파 노이즈억제기술개발을 확보한 기술 내용을 기재하였다.

• 기술혁신연구
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• 제12권3호
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• pp.97-109
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• 2004

According to "structure-conduct-performance" paradigm in IO, market structure (concentration) determines conduct (R&D investments), and conduct yields market performance (ratio of price to marginal cost). Previous empirical studies on Schumpeter Mark I, II assumed that the explanatory variable (market structure) and the disturbance are uncorrelated in the R&D equation. In this situation, Ordinary Least Squares (OLS) estimates of the structural parameters are inconsistent, because the endogeneous variables (R&D and market structure) can be determined simultaneously. So, in this study, full information (or system methods) estimation is used to test Schumpeter hypothesis since joint estimation can as well bring efficiency gains in the seemingly uncorrelated regressions (SUR) setting.

• 한국가스학회지
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• 제15권6호
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• pp.1-7
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• 2011

도시가스 공급시설에서 위험인자의 계측은 근래까지 인력에 의하여 측정 및 확인되었으며 유선통신을 이용하여 원격모니터링 시스템으로 진화해왔다. 더 나아가 국내/외 산업시설은 무선통신 기반 원격 모니터링 시스템 및 제어 시스템을 개발하여 관리의 효율성을 향상시켜왔다. 그러나 외부에서 데이터를 확인이 즉각적으로 확인하기 위해서는 유선으로 PDA나 노트북에 연결함으로써 효율성과 편의성이 감소되기 때문에 본 논문은 증강현실 기반 모바일 도시가스 안전관리 시스템을 개발하여 도시가스 공급시설의 안전관리 효율성을 개선하고자 한다.

• 기술혁신학회지
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• 제12권1호
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• pp.1-35
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• 2009

각국의 과학기술연구개발 투자는 자연의 법칙 규명과 진리탐구에서 벗어나 국가발전의 핵심적인 경쟁력확보 및 삶의 질 향상을 목적으로 하고 있다. 이러한 국가경쟁력을 확보하기 위해서 국가가 시행하는 여러 정책 중에서 정부의 막대한 예산이 투입되는 국가연구개발사업은 사회에 미치는 여러 가지 파급효과를 고려해 보았을 때 중요한 위치를 차지하고 있다. 연구관리 전문기관은 국민의 세금으로 조성된 정부 R&D 정부예산을 정부를 대신하여 연구기획 관리 평가의 공적기능을 민간조직의 형태로 추진하는 점에서 볼 때 준공공부문에 해당하는 특성을 가지고 있다. 정부 R&D 투자의 중요한 주체로서의 연구관리 전문기관의 그 역할의 중요성에도 불구하고, 부처 중심의 정부연구개발예산 편성으로 인해 그 중요성이 간과되어 왔다. 각 부처에 산재해 있는 연구관리 전문기관에 대한 국가적 차원의 현황 파악과 이를 바탕으로 한 이론적 논의가 본격적으로 다루어진 선행연구가 부족하여 관련 정책을 수립하고 시행하는데 많은 어려움이 노정되고 있다. 이에 연구관리 전문기관의 현황파악을 통하여 현상을 분석하고 개념적 특성을 도출하여 유형화를 시도하였다.

• 기술혁신학회지
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• 제19권1호
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• pp.191-229
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• 2016

우리나라 국가연구개발사업의 규모가 꾸준히 증가하면서 국가 R&D 예산의 투자 효율성 효과성 제고 필요성에 대한 꾸준한 논의가 이루어져 왔다. 따라서 국가연구개발사업의 효율성 효과성 제고를 위한 성과평가체계 구축에 노력하고 있으며 국가연구개발사업 상위평가 결과와 차기 년도 예산배분과의 연계를 명문화한 것이 대표적인 제도이다. 그러나 '국가연구개발사업 상위평가 결과 우수 등급 이상인 사업은 예산을 증액하며, 미흡 이하의 사업은 감액한다.'는 법 제도상 명문화된 규정과는 다르게 성과평가 결과와 예산배분 간 연계의 실효성에 대해서는 다양한 선행연구를 통해 나타났듯이 엇갈린 평가가 이뤄져 오고 있다. 본 연구에서는 그 간의 논란이 되어온 성과평과와 예산배분구조 연계정책 관련 법 제도적 명문화 규정의 순기능 작동여부에 대해 명확히 실증하기 위해 패널회귀분석 및 정량적 데이터를 활용하여 분석을 추진하였다. 또한 국가연구개발사업 성과평가결과와 예산배분 구조의 연계성을 저해하는 원인에 대해 분석하고 이러한 저해요인 최소화를 통해 성과평가 제도의 체계성 및 평가결과의 신뢰성을 극대화하기 위한 다각적인 고도화 방안에 대해 고찰하였다.

• 한국자동차공학회논문집
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• 제16권5호
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• pp.147-156
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• 2008

As the management of fuel efficiency becomes globally reinforced in attempts to find an environment-friendly vehicle that will operate against global warming, the interest in and the demand for the type of vehicle with a high-efficiency diesel engine using light oil. However, it also emits a greater amount of PM (particulate matter) and NOx than emissions from vehicles using other types of fuels. Therefore, the DME (Dimethyl Ether), an oxygen containing fuel draws attention as an alternative fuel for light oil that can be used for diesel engines since it generates very little smoke. But to develop and compare performance of an electric controlled common-rail DME engine, engine tests requires optimized injection conditions at required engine RPM and engine torque. These injection conditions cannot be set freely and the data configuration through the experimentally repeated application requires much time as well as a significant amount of errors and effort. The object of this study is to configure the basic injection map using the results of the DME engine experiments performed so far. For this, in this study, the functionalization of the required equations were performed along with the basic review of the factors that had influence on the data map. Through this, the information on the injection pressure, injection amount, injection duration, injection timing, etc. under certain operation condition could be obtained.

• Nuclear Engineering and Technology
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• 제35권3호
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• pp.234-242
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• 2003

The full energy peak efficiency of a hyper pure germanium (HPGe) detector was calibrated in a wide energy range from 0.06 to 11 MeV. Both the experimental technique and the Monte Carlo method were used for the efficiency calibration. The measurement was performed using the standard radioisotopes in the low energy region of $60{\sim}1408$ keV, which was further extended up to 11 MeV by using the $^{14}N(n,r)\;and\;^{35}Cl(n,r)$ reactions. The GEANT Monte Carlo code was used for efficiency calculation. The calculated efficiency had the same dependency on the r-ray energy with the measurement, and the discrepancy between the calculation and the measurement was minimized by fine-tuning of the detector geometry. From the calculated result, the efficiency curve of the HPGe detector was reliably determined particularly in the high energy region above several MeV, where the number of measured efficiency points is relatively small despite the wide energy region. The calculated efficiency agreed with the measurement within about $7\%$. In addition to the efficiency calculation, the origin of the local minimum near 600 keV on the efficiency curve was analyzed as a general characteristics of a HPGe detector.