• ICROS
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• v.2 no.4
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• pp.19-29
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• 1996

본 고에서는 분산제어 및 자동화 시스템에서 필드버스 기술의 필요성과 현황 및 앞으로의 전망에 대하여 기술하였다. 또한, 필드버스에 접속되는 장비들에서 생성되는 데이터들은 크게 주기적, 실시간 및 비실시간 데이터 트래픽의 세가지로 나눌 수 있으며, 필드버스 네트워크의 제한된 대역폭이 이러한 데이터 트래픽을 수용하는 경우에 실시간 및 주기적 데이터의 전송지연시간에 대한 요구사항을 만족시키는 동시에 네트워크 설계기법을 소개하였다.

• Proceedings of the KAIS Fall Conference
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• 2007.11a
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• pp.297-299
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• 2007

본 논문은 유한한 유전체 격자구조에 입사되는 TE필드가 유전체 내부에 발생시키는 모드의 필드 분포와 방출하는 필드를 분석하였다. 입사되는 필드는 유전체 격자구조에 일정한 패턴의 모드를 형성한다. 유한한 길이의 격자구조의 영향을 받아 유전체 내부에 유한개의 모드가 만들어지며 모드들은 각기 독립적인 방사패턴을 갖는다. 이러한 방사패턴을 분석함으로써 실제로 제작되는 유전체 격자구조의 분석에 도움이 될 것으로 사료된다.

• The KIPS Transactions:PartB
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• v.14B no.4
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• pp.295-302
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• 2007

It is very iterative and complicated work to enter the personal information every time one fills the form-based resume or one joins the new membership page on the internet. Although there are some systems that have the personal information on the computer and fill the membership page automatically, their accuracies are not often satisfactory in that the fields and their values do not match exactly. The research proposes and implements a system that has user's information on the computer and reasons and fills the information automatically that a membership web page(target page) requests using the personal information ontology. During the reasoning process, the target page is analyzed to extract the requested fields. Then the requested field names are converted to the standard field names using synonym ontology. The converted requested fields find the appropriate level in the personal information ontology using ontology match making to generate the final field value. The system not only finds the similar fields but also generates the exact field values by reasoning on the information ontology hierarchy. By experimenting with several membership pages on the web, the system showed higher accuracy over the existing systems. The system can be easily applicable to the cases where one iteratively fills the same information such as resume form.

• 베이커리
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• no.4 s.369
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• pp.76-77
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• 1999

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.29 no.2
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• pp.5-34
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• 2018

In this research, we intended to discover all types of information related to international research cooperation, collect information by each type, and build a database. To this end, we initially developed metadata, discussed with metadata experts to develop metadata in the primary phase, and conducted a survey on the experts related to international research cooperation. Furthermore, we collected and entered data in the meta field for each type of information source, and verified the meta field through processes such as the existence of actual data for each meta field, among others. The types of database designed in this research are the international research cooperation information source database, international research cooperation project database, international research cooperation expert database, international research cooperation institution database, international organization database, and other database, and as a result of validating of the field by entering the data by conducting the survey, the survey results and the data entry rate by field demonstrated such a high rate of consistency. However, only the international organization data field was confirmed to have approximately 25% of the field having the data entry rate of less than 10% despite the high rate of significance rated by the users.

• Journal of Environmental Policy
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• v.9 no.4
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• pp.103-123
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• 2010

Many former industrial cities such as Cleveland, Ohio are trying to transform their identities from blue-collar manufacturing centers to white-collar professional hubs. As a result, the re-use of land previously occupied by industrial firms has been on the rise as an important sustainable land-use strategy in the United States. Ohio's Cuyahoga County offers a Brownfield Redevelopment Fund to overcome the environmental barriers inherent in re-use in order to obtain full use of underutilized properties in the county. This study estimates externality effects of brownfield redevelopment projects (BRPs) on nearby housing sales prices in Cuyahoga County. Typical hedonic regression models that employ "difference-in-difference" techniques are used to compare proximal housing sale prices before and after the completion of BRPs.

• Journal of the Korean Institute of Telematics and Electronics S
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• v.35S no.10
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• pp.94-117
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• 1998

This paper investigates the performance characteristics of the data link layer of the 1996 version of IEC/ISA fieldbus which is developed as internatioal standard of fieldbus. A discrete-event simulation model of the data link layer of IEC/ISA fieldbus is developed. Using the simulation model, this paper identifies the network parameters that influence the performance of prioritys scheme and real-time data transmission, and analyzes the delay performance of IEC/ISA fieldbus with respect to the change of network parameters. The simulation model also integrates continuous-time simulation model of a control system as application process. Using the integrated simulation model, this study investigates the effect of network-induced delay on the performance of control system. Since the simulation model developed in this study can predict the network performance, it will be effectively utilized in the design phase of control and automation systems that adopt the IEC/ISA fieldbus.

• Journal of Broadcast Engineering
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• v.24 no.5
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• pp.755-764
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• 2019

Currently commercially available light field cameras are difficult to acquire 5D light field video since it can only acquire the still images or high price of the device. In order to solve these problems, we propose a deep learning based method for synthesizing the light field video from monocular video. To solve the problem of obtaining the light field video training data, we use UnrealCV to acquire synthetic light field data by realistic rendering of 3D graphic scene and use it for training. The proposed deep running framework synthesizes the light field video with each sub-aperture image (SAI) of $9{\times}9$ from the input monocular video. The proposed network consists of a network for predicting the appearance flow from the input image converted to the luminance image, and a network for predicting the optical flow between the adjacent light field video frames obtained from the appearance flow.

• Journal of Practical Engineering Education
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• v.9 no.1
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• pp.49-56
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• 2017

Recently, due to Industry 4.0, there is a great interest in smart factory for productivity improvement and customer satisfaction in manufacturing industry, and construction is also actively pursued by government support. In particular, data integration and fieldbus communication technology to build an efficient production system are essential. Fieldbus is an open control system that is not tied to a specific vendor system and has various advantages such as compatibility with other products, accuracy of data transmission, and remote diagnosis. However, there are no educational equipment for training field buses, training courses and examples for practical training, and there are many limitations in improving the practical skills needed for building smart factories in the industrial field. Therefore, this study develops PLC based fieldbus education equipment and training course based on previous research results that selected PLC and communication technology suitable for domestic industry field for practical fieldbus training and develops the training program of Ethernet IP, Profibus DP, Modbus, CC-Link, and DeviceNet. In addition, it is confirmed that the control and remote diagnosis of distributed field devices are possible by data collection and monitoring.

• Broadcasting and Media Magazine
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• v.24 no.2
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• pp.39-52
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• 2019

본 고에서는 라이트필드 혹은 디지털 홀로그램에 기반한 근안 디스플레이 기술에 대하여 알아본다. 헤드 마운티드 디스플레이로 불리기도 하는 근안 디스플레이는 사용자가 착용하는 안경 형태의 디스플레이 기기를 말하며, 가상현실 및 증강현실 응용의 핵심 기기 중 하나이다. 본 고에서는 라이트필드 및 디지털 홀로그램 기술이 근안 디스플레이에 적용될 경우 갖는 장점들을 살펴보고 관련 연구 동향을 소개한다.