• 제목/요약/키워드: Field Utilization System

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치안분야의 정보통신기술 활용방안 연구 - 빅데이터기반 치안수요분석과 대응체계를 중심으로 - (Information and Communications Technology in the Field of Public Security: Crime Prevention and Response System)

  • 김연수
    • 융합보안논문지
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    • 제16권6_2호
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    • pp.23-32
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    • 2016
  • 급격한 정보통신기술의 발달은 경찰에게 새로운 도전이자 기회가 되고 있다. 이 연구는 국내외 치안분야의 ICT기술 활용사례를 검토하고, 그 시사점을 확인하는 것을 목적으로 한다. 이를 위해 정보통신기술 활용에 관한 경찰활동의 근거이론으로 정보주도 경찰활동(intelligence-led policing), 예측적 경찰활동(predictive policing), 증거기반 경찰활동(evidence-based policing)의 개념에 대해 소개하였다. 또, 빅데이터 기반 범죄분석과 예측기술 활용방안과 경찰의 정보통신체계 및 지휘통제기술의 고도화방안에 대해 논의하였다. 이 연구를 통해 확인한 시사점으로 (1) 기본데이터의 확보, (2) 활용가능한 통합D/B의 구축, (3) 정책결정자의 활용성 증대, (4) 유관기관 사이의 교류협력, (5) 전문가집단의 양성, (6) 통합 D/B구축의 법적 근거와 실무적 가이드라인 마련을 제안한다.

성장기술 프로그램의 보급 및 활용에 관한 연구 (Dissemination and Utilization of Growing-up Skills Program)

  • 최명민
    • 한국사회복지학
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    • 제52권
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    • pp.89-115
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    • 2003
  • 그동안 사회복지 임상실천 분야에서 주로 관심을 기울여 온 것은 개입방법의 개발과 효과성 측정 연구였다. 반면 이러한 연구 결과물이 어떻게 현장에 보급되고 활용되는지에 대한 관심은 상대적으로 부족한 편이었다. 이러한 현상은 결과적으로 연구와 실천간의 괴리를 초래할 수 있다는 비판이 제기되면서, 최근 외국에서는 사회복지 분야에서도 이론과 실천, 또는 학문과 현장을 잇는 중요한 기제로서 지식 및 기술의 보급과 활용에 대한 관심이 부각되고 있다. 이에 본 연구에서는 본 연구자가 프로그램 개발에 이어 현장보급 노력을 기울여 온 성장기술 프로그램을 중심으로 현장보급 과정과 활용현황을 살펴보고자 하였다. 이를 위하여 보급과 활용에 관한 기존 이론 및 모델들을 정리하고, 그 중 Herie와 Martin의 연구-실천 가교 모델에 의거하여 성장기술 프로그램의 현장 보급과정 및 활용 상황을 추적 조사하고 분석해 보았다. 그 결과 성장기술 프로그램 보급과정의 문제점으로는 구체적인 전략의 부재, 계획성 부족으로 인한 즉흥적인 대응, 초기 보급 대상자에 대한 허술한 파악 등을 도출할 수 있었다. 그리고 효과적인 보급과 활용을 위해서는 적절한 모델을 선택하고 그에 따라 보급과정을 적용하고 실천할 것, 프로그램 개발과정부터 보급에 대해 염두를 두고 진행할 것, 프로그램 개발 뿐 아니라 현장 피드백 확보를 위한 노력을 기울일 것, 그리고 사회복지 교육 및 연구에서 전파과정에 대한 부분을 강화할 것 등을 제언하였다. 이를 통해 몇 가지 한계점들에도 불구하고 보급 및 활용에 대한 중요성을 제시할 수 있었으며, 성장기술 프로그램의 현장 활용성도 파악할 수 있었다. 이와 같은 보급과 활용에 대한 논의들은 국내에서 진행되는 연구의 전파 뿐 아니라 그동안 외국으로부터 도입해온 개입방법들을 한국 상황에 맞게 토착화하기 위하여 앞으로 더욱 활성화될 필요가 있을 것이다.

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주차설비용 벡터제어 유도전동기 시스템의 약계자제어에 관한 연구 (A study on the Field Weakening Control of Induction Machine System for Parking Facilities)

  • 최철;이상훈;김병수;김철우
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1998년도 하계학술대회 논문집 F
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    • pp.1919-1921
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    • 1998
  • In this paper, a control method for field weakening region of induction machine drive which is based on indirect field oriented control was implemented. Also, application method of direct field oriented control in the field weakening region using maximum torque control methods which is adaptable for parking facilities was studied. The implemented method which is based on direct field oriented control method ensures the full utilization of the output torque capability of the machine over the conventional 1/${\omega}_r$ method. And machine drive system can obtain the robustness to motor parameter variation.

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필드 버스 시스템을 위한 네트웍 스케쥴링 알고리즘 (Network scheduling algorithm for field bus system)

  • 추성호;김일환
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 1996년도 한국자동제어학술회의논문집(국내학술편); 포항공과대학교, 포항; 24-26 Oct. 1996
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    • pp.1348-1351
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    • 1996
  • In field bus network, field device are connected with a medium. Because a medium must be shared for transmitting data, there are random delay time when data arrive destination station. It is difficult that all data packets are guaranteed synchronization and real-time restriction. In this paper, we show an algorithm that makes network utilization to maximum, guarantees real-time restriction, calculates sampling time at all control loop.

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태양광발전 어레이 표면의 냉각/세정에 대한 장기 실증 실험 (Long-term Experiments of the Cooling/Cleaning on the surface of the PV Power Array)

  • 한준선;김이현;지희관;유상필
    • 한국태양에너지학회:학술대회논문집
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    • 한국태양에너지학회 2012년도 춘계학술발표대회 논문집
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    • pp.248-254
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    • 2012
  • In the situation of expanding domestic solar power supply business long-term performance modeling of a proposed solar-cooling and cleaning system to increase electromotive force and light transmission is carried out to test the effectiveness of the system. To test the effectiveness of the system, the data which comparing the solar power planet installing the system to not installing at the same time is used. A difference between the utilization factor of each comparison group were recorded. Approximately from one year to two years Field Test was performed, Result of apply to cooling/cleaning technology, Each of plant by From least 7 percent up to 16 percent utilization factor increased, and the cooling / cleaning is output through improved as a result of the determined.

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Study on the Dielectric Characteristics of Gaseous Nitrogen for Designing a High Voltage Superconducting Fault Current Limiter

  • Heo, Jeong-Il;Hong, Jong-Gi;Nam, Seok-Ho;Kang, Hyoung-Ku
    • 한국초전도ㆍ저온공학회논문지
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    • 제14권2호
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    • pp.28-31
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    • 2012
  • The study on the dielectric characteristics of gaseous insulation medium is important for designing current leads of superconducting machines using a sub-cooled liquid nitrogen ($LN_2$) cooling method. In a sub-cooled $LN_2$ cooling system, the temperature of gaseous insulation medium surrounding current leads varies from the temperature of coolant to 300 K according to the displacement between the electrode system and the surface of sub-cooled $LN_2$. In this paper, AC withstand voltage experiments on gaseous nitrogen according to temperature are conducted. Also, AC withstand voltage experiments on gaseous nitrogen according to pressure, size of electrode, and gap length between two electrodes are performed. It is found that there is a functional relation between the electrical breakdown voltage and the field utilization factor (${\xi}$). As a result, the empirical formula for estimating an electrical breakdown voltage is deduced by adopting the concept of field utilization factors. It is expected that the experimental results presented in this paper are helpful to design current leads for a high voltage superconducting apparatus such as a superconducting fault current limiter (SFCL) using a sub-cooled $LN_2$ cooling system.

한국에 있어서 답리작을 이용한 양질 조사료 생산기술 (Studies on the Forage Production and Utilization on Paddy Field in Korea)

  • 서성;육완방
    • 한국초지학회:학술대회논문집
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    • 한국초지조사료학회 2002년도 창립 30주년 International Symposium
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    • pp.5-56
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    • 2002
  • The problems in the current domestic forage production were evaluated, and the prospective improvement was suggested in this paper. Grassland development in forest, production of high quality forages in upland and paddy land, efficient utilization of rice straw, development of new varieties of forages suitable for our environmental conditions and imported forages were described Among them, preferential production and utilization of forages using paddy field after rice harvest . should be enlarged for domestic supply of forages in Korea. Several studies were carried out to select the promising forage crops and barley cultivars for whole crop silage production, to determine productivity, nutritive value and production cost of forages produced in paddy field, and feeding effect of forages with Hanuwoo and milking cow for whole crop silage with forages produced in paddy field, 1999 to 2001, and also discussed restraint factors and activation plans for enlargement of forage production in paddy land. The promising forage crops in paddy field were rye and barley for Middle region, and rye, barley, early maturing Italian ryegrass and wheat for Southern region. The promising barley cultivars for whole crop silage in paddy field were Albori in Suwon, Keunalbori, Milyang 92, Saessalbori, and Naehanssalbori in Iksan, and Keunalbori, Albori, Naehanssalbori, and Saegangbori in Milyang, respectively. Silage production, quality and animal palatability of silage by trench and round bale were also compared. The production yields of whole crop barley silage(WBS) were 17,135kg as a fresh matter, and 6,011kg as a dry matter per ha, and the quality of WBS was 2∼3 grade, while that of rice straw silage was 4 grade as a farm basis. The production cost of WBS per kg was 83won as a fresh matter, and 238won as a dry matter. Feeding of WBS as forages on Hanwoo was very desirable for the improvement of live-weight gain, beef quality and farm income, particularly in growing stage of Hanwoo. Milk production and income were also increased, and feed cost was decreased by feeding of WBS. The daily voluntary intake of WBS in milking cow was 26.3kg as a fresh matter(DM 7.7kg) per head. Milk production when WBS was fed, was very similar to that of imported hay feeding such as Kentucky bluegrass or domestic corn silage. The issues to be solved in near future f3r stable forage production and supply in paddy land are sustainable livestock-forages policy, development & seed production of new varieties of barley, rye, Italian ryegrass and other promising forages, efficient demand & supply system of forages, solidification for mass production and utilization of forages, efficient application management of animal slurry on paddy field considering environmental agriculture/livestock industry, and break k development of bottleneck technique in production field. Domestic production & supply of high cost agricultural machine (round baler, wrapper, handler and so on), plastic wrapping film, and silage additives are also important.

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A New Expression of Near-Field Gain Correction Using Photonic Sensor and Planar Near-Field Measurements

  • Hirose, Masanobu;Kurokawa, Satoru
    • Journal of electromagnetic engineering and science
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    • 제12권1호
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    • pp.85-93
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    • 2012
  • We propose a new expression of the near-field gain correction to calculate the on-axis far-field gain from the onaxis near-field gain for a directive antenna. The new expression is represented by transversal vectorial transmitting characteristics of two antennas that are measured by planar near-field equipment. Due to the advantages of the photonic sensor, the utilization of the new expression realizes the measurements of the on-axis far-field gains for two kinds of double ridged waveguide horn antennas within 0.1 dB deviation from 1 GHz to 6 GHz without calibrating the photonic sensor system.

Deregulation Necessity for the Invigoration of Drone Utilization in the Geospatial Information Field

  • Heo, Joonghyeok;Park, Joonkyu
    • 한국측량학회지
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    • 제40권4호
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    • pp.351-357
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    • 2022
  • In this study, a direction for deregulation that can increase the use of drones in the field of spatial information is presented. Regulations and administrative procedures for drone operation showed similar procedures in Japan, the United States, and Korea, such as reporting flight equipment, driver's license, and prohibition of flying within a specific flight zone. In the United States, policies to encourage the use of commercial drones have been implemented, and Japan has slightly tightened regulations on drone operation to protect the Olympics and important national facilities. As a result of the study, in the area where drone operation is restricted for geospatial data construction, Korea was setting the largest area, and GIS analysis showed that Korea's drone flight restricted area was more than 19.4% of the country's land area. In order to increase the utilization of drones in the construction and utilization of spatial information in the future, it is necessary to reset the drone flight restriction zone and reduce the area of the drone flight restriction zone. In addition, it was found that Korea is the only country that has formal and specific regulations on geospatial information security management. In order to increase the construction of geospatial information using drones, it is necessary to ease GSD (Ground Sample Distance)regulations.

벡터제어(制御) 유도전동기(誘導電動機)의 광역운전(廣域運轉) (Field Oriented Control of an Induction Motor in a Wide Speed Operating Region)

  • 김상훈
    • 산업기술연구
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    • 제17권
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    • pp.79-85
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    • 1997
  • This paper describes a control for the high performance induction motor drive system with a wide speed operating range and proposes a robust control method independent of motor parameter variation. For the operation below the rated speed, the high performance control is achieved by using the indirect field-oriented control with a speed sensor. In the high speed regain, the field weakening region with a large variation in motor parameters, the motor drive system can obtain the robustness to motor parameter variation by switchover to the direct field-oriented control. Also, the sensorless speed control using estimated speed is achieved in very high speed region that the utilization of speed sensor pulses is limited. And from experiments using high performance 32bit DSP for 2.2[kW] and 22[kW] laboratory induction motor drive systems, it is verified that the proposed opration algorithm provided a good performance.

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