• 수산경영론집
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• 제43권3호
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• pp.75-87
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• 2012

Today, the Korean fisheries is undergoing significant hardships, both domestically and internationally. While declining amount of catch, ascending international oil prices and others pose a compelling challenge to the fishing sector, the ever strengthening influence of international institutions related to fisheries and international trade organizations also compel to bring about myriad of changes in the realm of fishery products. Against the backdrop, this study attempted to examine the fisheries catch, aquaculture, service, processing fields in terms of its rippling effect and of how the industry has been changed by analyzing the past and present through an input-output analysis. As for research methods, 168 items of the input-output tables in 2000, 2005, 2009, and 2010 were integrated to form and classify 32 sectors (28 basic sectors + catch, aquaculture, fishery service, processed fishery products) so as to generate production inducement coefficient, sensitivity coefficient, and impact coefficient. The analysis results revealed that : though the linkage effect of fishery industry was not very sizable, the impact coefficient of the processed fishery products was high; the consumption and investment coefficient sector among production inducement coefficient was on an upturn trend ; the export coefficient was tended to decline. In the future research, it is necessary to carry out a study based on the integration of detailed classification (404 sector) and a study and analysis of fishery industry by different regions through the inter-regional input-output tables. The fishery industry is one of the crucial industries in Korea. The fishery industry is not only important in its own right but also significant as it exerts influence over other industries. Therefore, it is required that there should be more investment and supports for the development of the fishery industry, and pay efforts to ensure that the investment and development could lead to mutual growth for both the fishery and other various industries.

• The Journal of Asian Finance, Economics and Business
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• 제8권12호
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• pp.85-94
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• 2021

Infrastructure capacities are essential elements and one of the sustainable lines to drive economic growth. Infrastructure development, both physical and social, is vital to sector-wise economic development. However, there is limited evidence of how infrastructure development in certain sectors benefits the economy as a whole. This study explains the relationships between infrastructure and economic growth in selected middle-income Asian countries, highlighting the essential criteria to benefit from both physical and social infrastructure, as well as sectoral (agriculture, industry, and services) economic output. The research uses the data from 1990 to 2020 for empirical estimations. The study used Levin, Lin, & Chu test, ADF- Fischer chi- Square, and PP- Fischer Chi-Square to test unit root and to observe the stationary nature of the panel. Padroni and Kao cointegration is applied to check the cointegration among different panes. A Fully Modified OLS was employed for checking the association between physical and social infrastructure and economic growth. Results show that physical and social infrastructure negatively impact sectoral output in Asia's middle-income countries. Apart from infrastructure the per capita GDP growth, tax to GDP ratio, and population growth shows a simultaneous relation between infrastructure and sectoral economic growth.

• Current Optics and Photonics
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• 제7권3호
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• pp.297-303
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• 2023

In this paper, we demonstrated a high-energy (285 mJ) mid-infrared flashlamp-pumped electro-optically 𝚀-switched Er:YAG master oscillator power amplifier (MOPA) system and comprehensively investigated its temporal, spectral, and spatial characteristics. To increase the output energy, we optimized the delay between the timings at which the flashlamps of the master oscillator and power amplifier were triggered. In addition, the output energy was improved while minimizing thermal effects by cooling the MOPA system to a temperature slightly above the dew point. Consequently, the MOPA structure boosted the output energy without damaging the lithium niobate Pockels cell, which is a crucial element in 𝚀-switching. This design realized pulses with energies up to 0.285 J and pulse durations of approximately 140 ns at a wavelength of 2,936.7 nm. This high-energy mid-IR Er:YAG MOPA system can be used for various scientific, engineering, and military underwater applications.

• 한국시스템다이내믹스연구
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• 제6권1호
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• pp.71-98
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• 2005

If Korea Research & Development reinforces integrated control function, indeed would Korea Research & Development's output be increased? Truly, could Korea's competition be ultimately improved with technology innovation and accumulation of knowledge. Can reinforcement of Integrated control that reinforced efficiency of Research & Development's investment effects make Korea Research & Development's investment,itself, be decreased? I try to answer clearly that in a way to reorganize Korea technology Administration's system, introduced Korea Research & Development integrated control system's establishment is what to effect Korea innovation system's direction after answering clearly previous mentioned problems. In this study, to answer these problems view theoretical discussion about Korea innovation system, integrated control system and system dynamics. Set up analytic tools of system dynamics which includes Korea innovation system and integrated control system. Then, draw a general casual loop diagram, which includes established Korea Research & Development's integrated control system, of Korea innovation system's activity. In based these, develop situation model to analyze trend of Korea innovation system and derive a political meaning by analyzing value of Korea innovation system's major inflow, outflow and stock variations according to extent of Korea Research & Development's integrated control in the same model.

• 정보처리학회논문지D
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• 제16D권2호
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• pp.201-212
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• 2009

소프트웨어 개발시 요구사항의 일관성 및 완전성을 검증하기 위해 다양한 방법으로 산출물을 추적하는데, 기존 연구에서는 추적메타모델 또는 자동화된 도구를 제시하되 구체적인 추적산출물 및 추적요소 선정이 미흡하며, 추적요소를 제시하는 추적테이블 연구의 경우는 전체공정이 아닌 일부 공정만을 대상으로 추적하고 있다. 이에 본 연구는 일부 공정만 추적한 저자의 이전 추적테이블연구에 이어 프로젝트시작단계에서 아키텍쳐단계, 인도단계까지의 산출물을 추적한 확장된 요구사항추적테이블을 제시하였다. 또한 추적테이블이 확장됨에 따라 추적필드가 많아져서 추적이 복잡해지는 문제점을 해결하기 위해 개발프로세스단위로 통합/분리할 수 있는 추적테이블의 정규화 방안을 제시하였다. 본 연구를 D사의 H시스템개발프로젝트에 적용함으로써 연구의 적용가능성을 검증하고 요구사항의 오류를 쉽게 발견하는 추적의 효과를 확인하였다. 이에 연구를 통해 요구사항의 일관성과 완전성을 검증하는 추적의 정확성을 높여 소프트웨어 개발의 실패를 최소화하고자 하였다.

• 한국산학기술학회논문지
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• 제21권4호
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• pp.509-517
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• 2020

본 연구는 3D 프린팅 기술을 활용한 거리 가구 제작 시 기술 특성 중요도를 도출하고 거리 가구 중 비정형 벤치 제작을 통해 우선순위가 높은 3D 프린팅 기술의 적용 방안을 제시하는 것을 목적으로 한다. 본 연구를 위해 품질기능전개(QFD: Quality Function Deployment) 방식으로 중요도를 분석하여 점수로 계량화하였으며 개발 및 연구에서 우선시 되어야할 기술요소는 '출력 크기', '재료의 수축성', '출력 각도' 순으로 나타났다. 연구결과의 검증을 위해 비정형 거리 가구 디자인을 대형 3D 프린팅 출력물로 제작하였으며 제작 과정에서 우선순위 기술요소들의 적용 방안을 모색하였다. 거리 가구 제작은 기능성과 안정성을 기반으로 설계되어야 하며 경제성, 제작성, 심미성 등이 고려되어야 하므로 '출력 크기'는 파츠의 분할을 최소화시켜 안정성을 확보하였다. '재료의 수축성'은 형태의 오차를 최소화시켜 심미성 및 제작성을 충족시켰으며 마지막으로 '출력 각도'는 출력물의 품질을 향상시켜 다양한 출력 각도를 통해 효율적이고 구조적 안정성이 있는 각도를 선정함으로써 연구결과에 대한 검증과 적용 방안에 대해 제시하였다.

• The Journal of Asian Finance, Economics and Business
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• 제7권6호
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• pp.379-385
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• 2020

The effect of research and development (R&D) expenditure on firm output is an interesting topic, but hardly explored in developing countries due to the unavailability of data. This study investigates this topic in the context of Vietnam by utilizing a novel dataset of 343 firms listed on the Vietnam Stock Exchange in the 2010-2018 period. The effect of R&D expenditure is examined under the production function framework. In order to obtain the robustness of the quantitative results, we estimate the production function with two coherent techniques including the OLS and 2-SLS. An instrumental variable regression technique is adopted to avoid the endogeneity problem between R&D expenditure and other variables. In our empirical analysis, we find that R&D expenditure has a positive and significant impact on output growth. The finding is robust in both OLS and 2-SLS frameworks. Besides, the output elasticity to R&D expenditure of our result is much higher than the estimated elasticity of other countries. The results imply that a 1% increase in R&D expenditure in Vietnam will help to expand the output more than a 1% increase in R&D investment in other countries. The findings from our paper provide important implications for firm managers, investors, and policymakers in Vietnam.

• 한국정보통신학회논문지
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• 제15권7호
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• pp.1591-1597
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• 2011

본 논문에서는 심폐기능에 이상이 있는 중환자의 상태를 진단하거나 치료 방향을 정하기 위하여 심박 출량을 측정하는 플랫폼 구현에 관한 연구로써, 센서가 내장된 Swan-Ganz Catheter를 체내에 삽입 후, 생리식염수를 투입하여 생기는 온도변화량을 열희석법을 이용하여 심박출량을 구하는 방법을 사용한다. Swan-Ganz Catheter는 온도센서와 압력센서를 포함하고 있으며 이를 통해 입력되는 센서 값을 보다 세밀하게 수집한다면 심박출량, 전선 및 폐혈관저항, 산소소모량 등을 보다 정확하게 계산해 낼 수가 있으므로 환자의 상태를 보다 정확하게 진단 및 치료가 가능하게 한다.

• Progress in Superconductivity
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• 제5권1호
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• pp.17-20
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• 2003

We have designed and measured a SFQ(Single Flux Quantum) DFFC and an Inverter(NOT) for superconducting ALU(Arithmetic Logic Unit) development. To optimize the circuit, we used Julia, XIC, and L meter for circuit simulations and circuit layouts. The Inverter was consisted of a D Flip-Flop, a data input, a clock input and a data output. If a data pulse arrives at the inverter, then the output reads ‘0’ (no output pulse is produced) at the next clock period. If there is no input data pulse, it reads out ‘1’(output pulse is produced). The DFFC was consisted of a D flip-Flop, an Inverter, a Data in, a Clock in and two outputs. If a data pulse arrives at the DFFC circuit, then the output2 reads ‘1’ at the next clock period, otherwise it reads out ‘1’ to output1. Operation of the fabricated chip was performed at the liquid helium temperature and at the frequencies of 1KHz.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년 학술대회 논문집 정보 및 제어부문
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• pp.391-393
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• 2006

In this paper, we develop a portable game device with uncompressed HD video and high quality sound output. Portable game devices support not only game function but also various complex functions recently. It especially supports TV-Out port to play realistic game, connecting a large screen display device. But the video and audio output signals of conventional TV-out port have the low performance and these signals are analog output. So, it is difficult that the users enjoy realistic game with benefit of high resolution digital TV. We propose the game device output with uncompressed digital signal, which has no delay of video/audio signal, also has strong immunity to external noise. Since it supports a high resolution video and high quality sound, users can playa realistic game. First, we implement the HDMI to the game device and we test reliability with the various resolutions video inputs and audio inputs. The proposed method can be applied multimedia devices requiring high performance output function as well as portable devices.