• Journal of the Korean Society for Library and Information Science
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• v.56 no.3
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• pp.153-179
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• 2022

The purpose of this study, was to examine and understand the possibility of introducing a standard field training semester system and the possibility of operating an autonomous field training semester system that can be operated without payment and propose a response strategy based on their perception survey conducted with the field training institutions. As a result of the study, first, it is apparent that the practice institution shows a very low perception of operating hours and operating methods, including the allocation of job-related training hours. Second, the introduction status of standard field practice turned out to be very low, while the introduction status of standard field practice, operation and agreement, change of standard field practice, specific details of standard field practice contract, and satisfaction of standard field practice turned out to be very low. Based on which, this study considers the introduction of standard field practice based on the reference research including surveys, such as the amendments of the relevan laws, adoption of standard field practice semesters or autonomous field practice semesters, securing and sharing sufficient field practice manuals, among others.

• Proceedings of the KIEE Conference
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• 1996.07c
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• pp.1450-1452
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• 1996

In order to optimize the characteristics of gate insulator for FED(field emission device), we investigated the effect of wet-etching process on the gate insulator for fabrication of FED. We used the general three types of etchants for fabrication of the metal tip FEA(field emitter array), they are MO and oxide etchants to form the gate hole, and Al etchant to remove the release layer. In the result of the breakdown field of the insulator by the measure of the current-voltage characteristics, the breakdown field of insulator for immersing in oxide etchant was rapidly lowering with increasing etching time, but that for immersing in Al etchant was slow lowering. Also, in comparing cleaning with non-cleaning samples, the breakdown field of the cleaning samples was higher than that of non-cleaning samples.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.35 no.11C
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• pp.957-964
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• 2010

In this paper, we propose an indoor positioning algorithm based on 3 points near field angle-of-arrival estimation without side information. The conventional angle-of-arrival based positioning scheme requires the distance between the listener and the center of two points which is obtained by a received signal strength based range estimation. However, a received signal strength is affected by structure of room, placement of furniture, and characteristic of signal, these effects cause a large error to estimation of angle. In this paper, the proposed positioning scheme based on near field angle-of-arrival estimation can be used to estimate the position of listener without a prior distance information, just using time-difference-of-arrival information given from 3 points microphones. The performance of the proposed scheme is shown by cumulative distribution function of root mean squared error.

• Journal of the Korean Society of Safety
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• v.17 no.2
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• pp.32-38
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• 2002

In this paper, a new approach for the SynRM(Synchronous Reluctance Motor) control which ensures producing MTPA(Maximum Torque per Ampere) over the entire field weakening region is presented. In addition, this paper presents a speed sensorless control scheme of SynRM using flux observer. Also, by adjusting the base speed for the field weakening operation according to the flux level, the current and voltage limit, the smooth and precise transition into the field weakening operation can be achieved. The validity of the proposed scheme is verified through simulation.

• International Journal of Advanced Culture Technology
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• v.1 no.1
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• pp.19-22
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• 2013

The basic principle of the product manufacturing technology using the 3D printing technique materializes the material including the high molecular substance or plastic and metallic dust, and etc. the product into the laminate additive manufacturing according to the design diagram gradually. It is applied to the various industrial field including the field of food division, field of home appliances, field of medicine, field of mechanical department and construction, etc.. The global development case of 3D printing technique is the next. This study described global technology and market trends. Afterward, 3D printing technique manages the important role when it exceeds the product manufacturing view just and is grafted with the various technology including the biotechnology, nanotechnology, and etc. and it improves the quality of the human life.

• KOREAN JOURNAL OF PACKAGING SCIENCE & TECHNOLOGY
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• v.4 no.2
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• pp.39-44
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• 1998

We used recording device(EDR-3) to monitor the packages and the vehicle during shipment. Provided we did this enough times, we began to gain statistically valid information which could be used to describe the particular channel of distribution. The event was obviously changed from trip to trip, but in general we could have an idea of what to expect. Considerable amount of time and money were invested to record field data. Although not ideal, it was the best suited approach to gain information regarding a specific distribution channel. Based on the recorded field data, we could make our own packaging vibration testing specification through MIL-STD-810D(Guidance for development of laboratory dynamic test specification). This test specification was proved several times through field tests. As a result, we gained confidence in this revised vibration specification and come to know the development procedures of a laboratory dynamic test specification.

• Journal of Korean Library and Information Science Society
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• v.32 no.1
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• pp.223-248
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• 2001

The purpose of this study is to analyze the problems of classified items by directly applying the domestic literary publications of agriculture field one by one and to present revision scheme having KDC as the subject of the study. In order to do this, I directly applied and analyzed KDC's 4th edition to the 5,400 literatures of agricultural field from the collection list database at the National Library of Korea. Revision scheme of KDC's agricultural field that's been made based on the above revision scheme tried to follow the basic classified systems and items of KDC's 4th edition, if possible, and in terns of necessary items, it includes only addition of cycles and the minimum subdivided extension.

• Journal of Korea Society of Digital Industry and Information Management
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• v.4 no.1
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• pp.105-117
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• 2008

T Abstract This study investigates the influence of differential factors on learner satisfaction by field-independent learning style in e-learning. Most of data were collected from students. Participants were classified based on a learning style typology (field-independent/dependent) and, then, analyzed was the influence of key factors on learner satisfaction using multiple regression analysis. This study suggests that e-Learning service providers need to differentiate learners based on learning style in order to improve learner satisfaction. Specially, Field independent learners are more likely to be satisfied by the teacher's provide degree of joyful, degree of contents, degree of learning control pacing, ability of problem solving and consistency.

• Transactions of the Society of Information Storage Systems
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• v.2 no.4
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• pp.219-223
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• 2006

Near field recording(NFR) technology has been considered as a strong candidate to surpass the far-field diffraction limit imposed by the nature of light in present optical disk drives such as CD, DVD, and BD(Blu-ray Disk). In this paper, we suggest novel inside near-field dual layer recording concept using elliptic shape solid immersion lens(ESIL).

• Journal of the Korea Society of Computer and Information
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• v.22 no.7
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• pp.93-100
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• 2017

In this paper, we propose a methodology of using time-lag, make it serve the sound field, in order to smoothen the music production and reduce conflicts. The importance of music production in today's music industry chain is becoming more and more apparent. In the process of music production, the creators pay more attention to the design and adjustment of virtual sound field, especially the late mixing and production. In the process, as a commonly used tool for the adjustment of sound field, "time-lapse" plays a decisive role.