• Title/Summary/Keyword: Application Fields

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Soil Fertility Evaluation by Application of Geographic Information System for Tobacco Fields (지리정보시스템을 활용한 연초재배 토양의 비옥도 평가)

  • 석영선;홍순달;안정호
    • Journal of the Korean Society of Tobacco Science
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    • v.21 no.1
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    • pp.36-48
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    • 1999
  • Field test was conducted in Chungbuk province to evaluate the soil fertility using landscape and soil attributes by application of geographic information system(GIS) in 48 tobacco fields during 2 years(1996 ; 23 fields, 1997 ; 25 fields). The soil fertility factors and fertilizer effects were estimated by twenty five independent variables including 13 chemical properties and 12 GIS databases. Twenty five independent variables were classified by two groups, 15 quantitative indexes and 10 qualitative indexes and were analyzed by multiple linear regression (MLR) of SAS, REG and GLM models. The estimation model for evaluation of soil fertility and fertilizer effect was made by giving the estimate coefficient for each quantitative index and for each group of qualitative index significantly selected by MLR. Estimation for soil fertility factors and fertilizer effects by independent variables was better by MLR than single regression showing gradually improvement by adding chemical properties, quantitative indexes and qualitative indexes of GIS. Consequently, it is assumed that this approach by MLR with quantitative and qualitative indexes was available as an evaluation model of soil fertility and recommendation of optimum fertilization for tobacco field.

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Properties of the metallic glass thin films fabricated by multicomponent single alloying target and its applications in various industrial fields

  • Shin, S.Y.;Moon, K.I.
    • Proceedings of the Korean Institute of Surface Engineering Conference
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    • 2015.05a
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    • pp.77-77
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    • 2015
  • Metallic glass alloys having dense packing structure have short range ordered structure with long range homogeneity. Therefore, they can provide complete corrosion protection and unique electrical properties. Recently, metallic glass thin films have received much attention to extend its application fields combining with PVC coating technologies. The metallic glass thin films can change the surface properties of the conventional bulk materials which need anticorrosion properties. However, multi-component alloying targets are required to fabricate the metallic glass thin films because metallic glass alloys contain more than three elements. Recently, many researchers have been reported the properties of the metallic glass thin films synthesized with multi-cathode systems or amorphous target. But, it is difficult to fabricate the large sized sputtering targets for mass production equipment with high toughness and thermal stability. In this study, newly developed sputtering target with glass forming ability and the properties of the metallic glass thin films will be introduced with respect to the various application fields such as bipolar plate in PEM fuel cell and decorative coatings for electric device and construction fields.

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The study on the Proposals for Application to Information Technology in Field Construction (건설 현장의 정보기술 발전 방향에 관한 연구)

  • Kim Sung-Gun;Lee Ung-Kyun;Kang Kyung-In
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2005.05a
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    • pp.207-210
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    • 2005
  • Information Technology (IT) makes a great contribution towards improvement of productivity in construction industry. Because most of researches of construction industry's IT are focused on the whole field of the industry or development of information system, however, these have no regard for conditions in fields. Thus, this study proposes the requirements in order to improve the productivity and efficiency of field execution of construction industry. To achieve this aim, the surveys are conducted of the problems and conditions of IT application on site workers and managers. As a result, the followings are suggested: (1) user training should be exercised continuously, (2) infrastructure of IT constructed, (3) total management system of field execution developed, and (4) the development of IT system focused on fields. Therefore, this study provides meaningful proposal that can be set up basic direction toward IT investment and IT system development.

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A Study on Information of Steel Bridges Using Application Protocols of STEP on the Web (웹상에서 STEP의 응용프로토콜을 이용한 강교량 정보운용에 관한 연구)

  • 이상호;정연석;임승완
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • 2002.04a
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    • pp.284-291
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    • 2002
  • New information technology developments continue to have a significant impact on civil engineering fields. The objective of this study is to develop STEP-based database which will be able to store and manipulate the information of steel bridges over the life cycle. In this study, there are three steps to fulfil the objective to build database and develop the application module for that data model practically and effectively To begin with, STEP methodology for a development of data model has been used for modelling data structure. And then the data model for a steel bridge's shape and structural analysis information has been made up by using AP203 (configuration controlled design) and AP203 (composite and metallic structural analysis and related design) which are the international standard in STEP Lastly, the application module for an access to information of steel bridges has been developed by means of already made database. This study show efficiently the prototype of developing information system with the existing standard technology in civil engineering fields.

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Application of System Dynamics in Nursing Research (시스템 다이내믹스의 간호학에의 활용)

  • Kwak, Chan-Yeong
    • Korean System Dynamics Review
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    • v.10 no.4
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    • pp.73-83
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    • 2009
  • Systemic Dynamics has been widely used as a method for studies in the areas of education, health care, and behavioral sciences. This paper discussed the SD application in nursing research by illustrating examples of published articles in nursing discipline, which can be classified into physiologic, socio-psychological, and health policy fields. It also identified the limitations of SD use in nursing and suggests strategies in order to facilitate a SD method for nursing research: 1) systematic introduction of SD in nursing research fields; 2) Interest about SD as an innovative research method; 3) researcher's efforts to understand the SD method in academic settings.

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Current state and future prospect of technology development in satellite application (인공위성 활용 분야 기술 발전 현황 및 전망)

  • Lee, Jeong-Ho;Yoon, Bo-Yeol;Kim, Youn-Soo;Lim, Deok-Won;Heo, Moon-Beom;Lee, Byoung-Sun;Oh, Hyun-Ung
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.44 no.8
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    • pp.728-740
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    • 2016
  • Korea developed several satellites through government-led satellite development projects, and now operates earth observation satellites of various sensors, science and technology satellites, and communication satellites. Satellites can be utilized in many fields, and Satellite Information, Global Navigation Satellite System, Satellite Communications and Broadcasting, Space Solar Power System are typical application fields. Now that we have developed and operated several satellites, we have to concentrate more efforts on satellite application. In this paper, we reviewed the current states of the technologies of four satellite application fields mentioned above and analyzed the future prospects of them.

LIGHT-CONE EFFECT OF RADIATION FIELDS IN COSMOLOGICAL RADIATIVE TRANSFER SIMULATIONS

  • Ahn, Kyungjin
    • Journal of The Korean Astronomical Society
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    • v.48 no.1
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    • pp.67-73
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    • 2015
  • We present a novel method to implement time-delayed propagation of radiation fields in cosmological radiative transfer simulations. Time-delayed propagation of radiation fields requires construction of retarded-time fields by tracking the location and lifetime of radiation sources along the corresponding light-cones. Cosmological radiative transfer simulations have, until now, ignored this "light-cone effect" or implemented ray-tracing methods that are computationally demanding. We show that radiative transfer calculation of the time-delayed fields can be easily achieved in numerical simulations when periodic boundary conditions are used, by calculating the time-discretized retarded-time Green's function using the Fast Fourier Transform (FFT) method and convolving it with the source distribution. We also present a direct application of this method to the long-range radiation field of Lyman-Werner band photons, which is important in the high-redshift astrophysics with first stars.

Development of a Method for Improving the Electric Field Distribution in Patients Undergoing Tumor-Treating Fields Therapy

  • Sung, Jiwon;Seo, Jaehyeon;Jo, Yunhui;Yoon, Myonggeun;Hwang, Sang-Gu;Kim, Eun Ho
    • Journal of the Korean Physical Society
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    • v.73 no.10
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    • pp.1577-1583
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    • 2018
  • Tumor-treating fields therapy involves placing pads onto the patient's skin to create a low- intensity (1 - 3 V/cm), intermediate frequency (100 - 300 kHz), alternating electric field to treat cancerous tumors. This new treatment modality has been approved by the Food and Drug Administration in the USA to treat patients with both newly diagnosed and recurrent glioblastoma. To deliver the prescribed electric field intensity to the tumor while minimizing exposure of organs at risk, we developed an optimization method for the electric field distribution in the body and compared the electric field distribution in the body before and after application of this optimization algorithm. To determine the electric field distribution in the body before optimization, we applied the same electric potential to all pairs of electric pads located on opposite sides of models. We subsequently adjusted the intensity of the electric field to each pair of pads to optimize the electric field distribution in the body, resulting in the prescribed electric field intensity to the tumor while minimizing electric fields at organs at risk. A comparison of the electric field distribution within the body before and after optimization showed that application of the optimization algorithm delivered a therapeutically effective electric field to the tumor while minimizing the average and the maximum field strength applied to organs at risk. Use of this optimization algorithm when planning tumor-treating fields therapy should maintain or increase the intensity of the electric field applied to the tumor while minimizing the intensity of the electric field applied to organs at risk. This would enhance the effectiveness of tumor-treating fields therapy while reducing dangerous side effects.

A study on the application of robots in electric power company (전력회사의 로보트 적용현황에 관한 조사연구)

  • 이범희;우희곤;양일권;김정국;홍지민;문찬우;이명웅;박시영;서창원
    • 제어로봇시스템학회:학술대회논문집
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    • 1990.10a
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    • pp.73-78
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    • 1990
  • As a preliminary study for the application of robots in electrical power company, several case studies in foreign countries, such as a substation patrol robot, a robot for nuclear power facilities, an insulator cleaning robot and a robot system for live-distribution line works, have been carried out for the application of robots. Various application fields, application-related problems, technical difficulties, and the feasibility of applications are studied.

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