• 제목/요약/키워드: Infrastructure engineering platform

검색결과 136건 처리시간 0.019초

Open Source Cloud Computing: An Experience Case of Geo-based Image Handling in Amazon Web Services

  • Lee, Ki-Won
    • 대한원격탐사학회지
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    • 제28권3호
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    • pp.337-346
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    • 2012
  • In the view from most application system developers and users, cloud computing becomes popular in recent years and is still evolving. But in fact it is not easy to reach at the level of actual operations. Despite, it is known that the cloud in the practical stage provides a new pattern for deploying a geo-spatial application. However, domestically geo-spatial application implementation and operation based on this concept or scheme is on the beginning stage. It is the motivation of this works. Although this study is an introductory level, a simple and practical processed result was presented. This study was carried out on Amazon web services platform, as infrastructure as a service in the geo-spatial areas. Under this environment, cloud instance, a web and mobile system being previously implemented in the multi-layered structure for geo-spatial open sources of database and application server, was generated. Judging from this example, it is highly possible that cloud services with the functions of geo-processing service and large volume data handling are the crucial point, leading a new business model for civilian remote sensing application and geo-spatial enterprise industry. The further works to extend geo-spatial applications in cloud computing paradigm are left.

u-IT 기반의 생장환경 관리 시스템 (u-IT Based Plant Growth Environment Management System)

  • 조승일;김종찬;반경진;김치용;김응곤
    • 한국정보통신학회:학술대회논문집
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    • 한국해양정보통신학회 2011년도 춘계학술대회
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    • pp.362-364
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    • 2011
  • 유비쿼터스 농업 환경을 성공적으로 구축하기 위해서는 센서노드 H/W, 센서노드 미들웨이 플랫폼, 라우팅 프로토콜, 농업환경 응용 서비스 등 농업에 최적화된 핵심 기술 개발이 필요하다. 전통산업인 농업 분야에 u-IT 기술을 적용함으로써 융복합기술이 노동집약적인 농업의 부가가치와 생산성을 높일 수 있는 원천기술로 자리 잡고 있다. 하지만 이러한 기술을 이용한 원예 산업 영역확장 및 시설원예에 대한 인프라 개선이 시급하다. 본 논문에서는 정밀한 식물 생장환경관리를 위해서 재배온실에 환경요인 모니터링 센서 및 생체 정보 센서들을 이용하여 생장환경 관리 시스템을 제안했다.

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중소기업에서 정부 3.0기반의 빅 데이터 활용정책 (In Small and Medium Business the Government 3.0-based Big Data Utilization Policy)

  • 조영복;우성희;이상호
    • 중소기업융합학회논문지
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    • 제3권1호
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    • pp.15-22
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    • 2013
  • 현재 우리나라 중소기업은 혁신역량이 부족한 영세기업의 비중이 높고, 매출 규모가 건실한 기업군이 취약한 구조로 발전을 기대하기 어려운 상황이다. 따라서 정부 3.0을 기반으로 한 중소기업의 빅 데이터 활용방안을 제시한다. 정부 3.0을 기반으로 중소기업의 활성화를 위한 정부지원 빅 데이터 활용 방안을 제시한다. 정부3.0을 기반으로 빅 데이터 인프라를 중소기업과 중소 벤처들이 자유롭게 이용할 수 있는 개방형 빅 데이터 서비스 플랫폼의 구축이 반드시 필요하다.

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공항시설물에 대한 BIM 기반의 공통 데이터 표준 구축 방안 (Development of Common Data Standard for Airports Facilities based on Building Information Modeling (BIM))

  • 정의수;김기웅;최연철
    • 한국항공운항학회지
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    • 제29권3호
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    • pp.100-110
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    • 2021
  • Building Information Modeling(BIM) technology continues to develop and is now being applied to infrastructure facilities. As smart technology based on BIM is applied to the construction industry, the construction of the same data in a common environment is considered to be a very important step in various applications. This study was conducted on methods to establish an open BIM-based airport facility information common data environment. Therefore, this study develops the element technology to establish a common data environment for the integrated management of airport facility information, and aims to standardize data in the common data environment among various technologies and applications. In order to achieve the aim, in this study, the required technologies were derived by examining the common data environment and examining the civil engineering facility field and the case of integrated airport facility management. Through this, standards and development for information standard framework, information requirement level, BIM guidebook, and BIM library were developed in connection with national and higher standards. Through these standards, it is expected that the integrated management of various airport facilities will be efficiently carried out through a standard data platform in the future.

WAVE Communication-based V2I Channel Modeling

  • Lee, Soo-Hwan;Kim, Jong-Chan;Lim, Ki-Taek;Cho, Hyung-Rae;Seo, Dong-Hoan
    • Journal of Advanced Marine Engineering and Technology
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    • 제40권10호
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    • pp.899-905
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    • 2016
  • Wireless access in vehicle environment (WAVE) communication is currently being researched as core wireless communication technologies for cooperative intelligent transport systems (C-ITS). WAVE consists of both vehicle to vehicle (V2V) communication, which refers to communication between vehicles, and vehicle to infrastructure (V2I) communication, which refers to the communication between vehicles and road-side stations. V2I has a longer communication range than V2V, and its communication range and reception rate are heavily influenced by various factors such as structures on the road, the density of vehicles, and topography. Therefore, domestic environments in which there are many non-lines of sight (NLOS), such as mountains and urban areas, require optimized communication channel modeling based on research of V2I propagation characteristics. In the present study, the received signal strength indicator (RSSI) was measured on both an experience road and a test road, and the large-scale characteristics of the WAVE communication were analyzed using the data collected to assess the propagation environment of the WAVE-based V2I that is actually implemented on highways. Based on the results of this analysis, this paper proposes a WAVE communication channel model for domestic public roads by deriving the parameters of a dual-slope logarithmic distance implementing a two-ray ground-reflection model.

실내외 위치측위를 위한 Fingerprint 기반 측정오차 감소 방안 연구 (A Study on Measurement Error Reduction of Indoor and Outdoor Location Determination in Fingerprint Method)

  • 권대우;이두용;송영근;장정환;이창호
    • 대한안전경영과학회지
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    • 제13권1호
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    • pp.107-114
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    • 2011
  • Location-Based Service(LBS) is a service that provides a variety of convenience in life using location information that can be obtained by mobile communication network or satellite signal. In order to provide LBS precisely and efficiently, we need the location determination technology, platform technology and server technology. In this study, we studied on how we can reduce the error on location determination of objects such people and things. Fingerprint location determination method was applied to this study because it can be used at current wireless communication infrastructure and less influenced by a variety of noisy environment than other location determination methods. We converted the probability value to logarithmic scale value because using the sum of k probability values is not suitable to be applied to weight determination. In order to confirm the performance of suggested method, we developed location determination test program with Visual Basic 6.0 and performed the test. According to indoor and outdoor test results, the suggested stochastic method reduced the distance error by 17%, 18% and 9% respectively at indoor environment and 25%, 11% and 4% at outdoor environment compared with deterministic NN, kNN and kWNN fingerprint methods.

ToA 기반 실내 위치측위 시스템 개발에 관한 연구 (A Study on Development based on ToA Method of Location Determination System in Indoor)

  • 이두용;박설화;송영근;장정환;조용철;이창호
    • 대한안전경영과학회지
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    • 제13권1호
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    • pp.99-105
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    • 2011
  • Location-Based Service(LBS) is a service that provides a variety of convenience in life using location information that can be obtained by mobile communication network or satellite signal. In order to provide LBS precisely and efficiently, we have to need technologies such as location determination technology, platform technology and server technology first. In this study, we studied on how we can reduce the error on location determination of objects such people and things. Fingerprint location determination method was applied to this study because it can be used at current wireless communication infrastructure and less influenced by a variety of noisy environment than other location determination methods. We used the time of arrival(ToA) method in fingerprint location determination method. In order to confirm the performance of suggested method, we developed location determination test program with LAbVIEW 2010 and performed the test. According to indoor test results, the suggested method reduced the distance error by 24%, 34% and 19% respectively at indoor environment compared with deterministic kWNN and Rice Gaussian fingerprint methods.

세일요트 통합관리 시스템을 위한 웹기반 YWBS 설계 프로그램 (Development of a Web-Based Application for YWBS in Integrated Management Systems)

  • 이동건;남승훈;정용국;신종계
    • 대한산업공학회지
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    • 제39권1호
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    • pp.46-54
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    • 2013
  • Recently, the marine leisure industry has begun to make a mark on the growth engines of the Korean economy. Hence, various government research projects are in progress to catch up with the fundamental yacht technologies of advanced countries. Research on the integrated management technologies of sail yachts is carried out as a part of those projects. Work Breakdown Structure (WBS) is a basic architecture for robust and high-level management systems. In this paper, we suggest a product-oriented Yacht Work Breakdown Structure (YWBS). General WBS has a drawback in that it can only follow the targeted purpose, but YWBS allows for a generic WBS approach. This concept allows us to apply WBS to multi-purpose uses. The YWBS is used as an infrastructure in information management and for data relationships in sail yacht management systems. YWBS is designed and managed by a web application, and the system is implemented with a website as a user interface. This application has not only a design function, but also a data transfer function that is based on the Microsoft Silverlight platform, a kind of Rich Internet Application (RIA) technology. Using this application, YWBS designers can communicate with the management system without added tasks like as uploading and updating.

Structural analysis of a prestressed segmented girder using contact elements in ANSYS

  • Lazzari, Paula M.;Filho, Americo Campos;Lazzari, Bruna M.;Pacheco, Alexandre R.
    • Computers and Concrete
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    • 제20권3호
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    • pp.319-327
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    • 2017
  • Studying the structural behavior of prestressed segmented girders is quite important due to the large use this type of solution in viaducts and bridges. Thus, this work presents a nonlinear three-dimensional structural analysis of an externally prestressed segmented concrete girder through the Finite Element Method (FEM), using a customized ANSYS platform, version 14.5. Aiming the minimization of the computational effort by using the lowest number of finite elements, a new viscoelastoplastic material model has been implemented for the structural concrete with the UPF customization tool of ANSYS, adding new subroutines, written in FORTRAN programming language, to the main program. This model takes into consideration the cracking of concrete in its formulation, being based on fib Model Code 2010, which uses Ottosen rupture surface as the rupture criterion. By implementing this new material model, it was possible to use the three-dimensional 20-node quadratic element SOLID186 to model the concrete. Upon validation of the model, an externally prestressed segmented box concrete girder that was originally lab tested by Aparicio et al. (2002) has been computationally simulated. In the discretization of the structure, in addition to element SOLID186 for the concrete, unidimensional element LINK180 has been used to model the prestressing tendons, as well as contact elements CONTA174 and TARGE170 to simulate the dry joints along the segmented girder. Stresses in the concrete and in the prestressing tendons are assessed, as well as joint openings and load versus deflection diagrams. A comparison between numerical and experimental data is also presented, showing a good agreement.

비대면 환경에서의 비판적 사고와 토론교육 - 공대 신입생 대상 온라인 수업 사례를 중심으로 (Critical Thinking and Debate Education under Non-Face-to-Face Situation - Through Online classes for Freshmen at the Engineering College)

  • 신희선
    • 공학교육연구
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    • 제24권1호
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    • pp.34-45
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    • 2021
  • This research is a case study about "Critical Thinking and Debate Education" class which was done for freshmen at the engineering college of "S" Women's University. Real time remote classes through LMS and ZOOM were the most effective tools under on-line circumstances, considering the fact that video lectures only cannot cultivate students' capabilities of critical thinking and communication. Throughout the analysis on students' self-reflection journals and lecture evaluations, this paper examined considerable future points and the pros and cons of "Critical Thinking and Debate Education" under online presentation and discussion situation. As research outputs, students told they could feel less nervousness and anxiety when they exercise and have a presentation because they could choose familiar space for them. In addition, students also told that they feel comfortable about both self-feedback and peer evaluation, repeatedly seeing the recorded video clip. However, on the contrary, sometimes students felt uncomfortable due to unstable internet connection through the online classes, and they also were regretful about the missing chances of interaction between a teacher and students and of intimate exchanges among students. They also told they had felt a kind of limit of enhancing their presentation skills just in front of the monitor. Considering these outcomes, this research paper points out that online education needs to be proceeded by strengthening multi layered feedback to students with the build-up of a non-face-to-face stable educational infrastructure, application of online instructional strategy, and utilization of YouTube platform and video contents. Through this research paper, I hope the new system of encompassing on/off line "Critical Thinking and Debate Education" and effective teaching and learning method can be developed soon by strengthening the strength of online education.