• Title, Summary, Keyword: Core Quality

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A Study on the Wearing Behavior of Diamond Tool used to Machining of Ceramics (세라믹스 가공용 다이아몬드 공구 마모에 관한 연구)

  • Park, Sang-Hee;Kim, Kwang-Min;Choi, Seong-Dae;Hong, Young-Bae
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.10 no.1
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    • pp.73-79
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    • 2011
  • In this study, coring with diamond core drill on the sintered $Al_2O_3$ ceramic plate were carried out with different coring conditions such as various cutting speed and feed rate to evaluate their effectiveness on the wearing behavior of diamond tool and coring quality. The wearing rate of diamond core drill were getting better with increasing cutting speed and feed rate but the quality of cored hole were getting worse as increasing cutting speed and feed rate.

The Impacts of Participation Motivation and Service Quality on Satisfaction of the Trade Exhibition Participants (전시회의 참가동기와 서비스품질이 참가자 만족에 미치는 영향)

  • Kim, Kyung-Nam
    • International Commerce and Information Review
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    • v.10 no.2
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    • pp.211-232
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    • 2008
  • This research intends to explore two questions: 1) how the service qualities of trade exhibitions affect the participant's satisfaction, and 2) how participation motivation moderates the relationship's between the service quality and satisfaction. For this purpose, the service qualities were measured with respect to three components: 1) core services, 2) physical environments, and 3) personal services of trade exhibitions. The results showed that the core services had largest impact on the participant's satisfaction among three components. The influence of the personal services was next strong, and the impact of the physical environment was weakest. Participation motivation was shown to moderate the effects of core services and personal services on satisfaction, but its moderating impact on the relationship between physical environments and satisfaction was not observed.

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A Study on the Flexural Property of Glass Fiber Filled Coextruded Wood Plastic Composites (유리섬유가 충전된 공압출 목재.플라스틱 복합재의 굽힘 특성에 관한 연구)

  • Kim, Birm-June
    • Journal of the Korea Furniture Society
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    • v.24 no.4
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    • pp.379-388
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    • 2013
  • In this study, the effect of various glass fiber (GF) contents in a shell layer and shell thickness changes on the flexural property of coextruded wood plastic composites (WPCs) in combination with three core systems (weak, moderate, and strong) was investigated. GF behaved as an effective reinforcement for the whole coextruded WPCs and GF alignments in the shell layer played an important role in determining the flexural property of the coextruded WPCs. At a given shell thickness, the flexural property of the whole coextruded WPCs was improved with the increase of GF content in shell. For core quality, when the core is weak, increase of GF content in shell led to improved flexural property of the whole composites and increase of shell thickness helped it. On the other hand, when the core is strong, the flexural property of the whole composites showed reduced features at low GF content in shell and increase of shell thickness aggravated it. This approach provides a method for optimizing performance of the coextruded WPCs with various combinations of core-shell structure and properties.

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Functional Requirements of Data Repository for DMP Support and CoreTrustSeal Authentication

  • Kim, Sun-Tae
    • International Journal of Knowledge Content Development & Technology
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    • v.10 no.1
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    • pp.7-20
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    • 2020
  • For research data to be shared without legal, financial and technical barriers in the Open Science era, data repositories must have the functional requirements asked by DMP and CoreTrustSeal. In order to derive functional requirements for the data repository, this study analyzed the Data Management Plan (DMP) and CoreTrustSeal, the criteria for certification of research data repositories. Deposit, Ethics, License, Discovery, Identification, Reuse, Security, Preservation, Accessibility, Availability, and (Meta) Data Quality, commonly required by DMP and CoreTrustSeal, were derived as functional requirements that should be implemented first in implementing data repositories. Confidentiality, Integrity, Reliability, Archiving, Technical Infrastructure, Documented Storage Procedure, Organizational Infrastructure, (Meta) Data Evaluation, and Policy functions were further derived from CoreTrustSeal. The functional requirements of the data repository derived from this study may be required as a key function when developing the repository. It is also believed that it could be used as a key item to introduce repository functions to researchers for depositing data.

Construction of Practical Teaching System of Database Principles based on Core Literacy

  • JIN, Hua
    • Journal of Information Technology Applications and Management
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    • v.27 no.2
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    • pp.23-36
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    • 2020
  • The promulgation of the overall framework of Chinese students' development of core literacy has made the implementation of core literacy into specific teaching activities an urgent problem to be solved in the field of education. Based on the analysis of the problems existing in the undergraduate education under the mode of emphasizing theory and neglecting practice, this paper constructs the practical teaching system of Database Principle Course Based on the core quality, expounds the implementation strategy of practical teaching, and probes into how to train the students in the practical teaching of database principle Cultivate scientific spirit, learning ability, practical innovation, responsibility and other core literacy. After 5 rounds of practice, students have achieved better development in independent development and collaborative work, and their awareness of practical innovation has been significantly improved.

Core Managing Points in a Wine Training Program Deduced by Loyalty (와인교육프로그램 수강생의 충성도 군집별 교육프로그램의 중점관리점 도출)

  • Lee, In-Soon;Lee, Hae-Young;Kim, Hye-Young
    • Journal of the Korean Society of Food Culture
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    • v.28 no.4
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    • pp.371-385
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    • 2013
  • This study aimed to classify attendants of a wine training institute according to loyalty for wine training service program and to deduce the core managing points in a wine training program by IPA (Importance-Performance Analysis). Self-administered questionnaires were collected from 192 trainees and statistical data analysis completed using SPSS ver. 18.0. As a result of clustering analysis based on trainee loyalty from both attitude and behavioral perspectives, four classification groups were identified: a "genuine" loyalty group, a "latent" loyalty group, a "mendacious" loyalty group, and a "low" loyalty group. For the genuine loyalty group, the importance of total service quality was 4.32 on average whereas the performance was measured as 4.22; thus there was little difference between importance to quality and performance. However, for the other three groups, especially the low loyalty group, there were significant wide gaps between importance to quality and performance. According to IPA, different service quality items were posted on the 'Focus here' quadrant (a domain with high service quality importance but low performance) by group, while the other three quadrants had several common items regardless of the group. Finally, the core quality managing points were different depending on the level of trainee loyalty. Therefore, it is necessary to plan and conduct a wine training program that reflects the characteristics and needs of its students, which will lead to a differentiated management strategy according to the level of loyalty.

Analysis of Mechanical Characteristics of Polymer Sandwich Panels Containing Injection Molded and 3D Printed Pyramidal Kagome Cores

  • Yang, K.M.;Park, J.H.;Choi, T.G.;Hwang, J.S.;Yang, D.Y.;Lyu, M.-Y.
    • Elastomers and Composites
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    • v.51 no.4
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    • pp.275-279
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    • 2016
  • Additive manufacturing or 3D printing is a new manufacturing process and its application is getting growth. However, the product qualities such as mechanical strength, dimensional accuracy, and surface quality are low compared with conventional manufacturing process such as molding and machining. In this study not only mechanical characteristics of polymer sandwich panel having three dimensional core layer but also mechanical characteristics of core layer itself were analyzed. The shape of three dimensional core layer was pyramidal kagome structure. This core layer was fabricated by two different methods, injection molding with PP resin and material jetting type 3D printing with acrylic photo curable resin. The material for face sheets in the polymer sandwich panel was PP. Maximum load, stiffness, and elongation at break were examined for core layers fabricated by two different methods and also assembled polymer sandwich panels. 3D printed core showed brittle behavior, but the brittleness decreased in polymer sandwich panel containing 3D printed core. The availability of 3D printed article for the three dimensional core layer of polymer sandwich panel was verified.

Image Contrast Enhancement For Displaying Without Fading Under Environment Light

  • Monobe, Yusuke;Yamashita, Haruo;Kurosawa, Toshiharu;Kotera, Hiroaki
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.239-242
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    • 2004
  • This paper presents a novel contrast enhance algorithm for images displayed with bright environment light. This algorithm is designed to preserve local contrast based on the luminance ratio of the pixel to its local surround in attention. This algorithm improves image quality of projectors in a bright room.

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Improvement of Proton Beam Quality from the High-intensity Short Pulse Laser Interaction with a Micro-structured Target

  • Seo, Ju-Tae;Yoo, Seung-Hoon;Pae, Ki-Hong;Hahn, Sang-June
    • Journal of the Optical Society of Korea
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    • v.13 no.1
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    • pp.22-27
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    • 2009
  • Target design study to improve the quality of an accelerated proton beam from the interaction of a high-intensity short pulse laser with an overdense plasma slab has been accomplished by using a two-dimensional, fully electromagnetic and relativistic particle-in-cell (PIC) simulation. The target consists of a thin core part and a thick peripheral part of equivalent plasma densities, while the ratio of the radius of the core part to the laser spot size, and the position of the peripheral part relative to the fixed core part were varied. The positive effects of this core-peripheral target structure could be expected from the knowledge of the typical target normal sheath acceleration (TNSA) mechanism in a laser-plasma interaction, and were apparently evidenced from the comparison with the case of a conventional simple planar target and the case of the transversal size reduction of the simple planar target. Improvements of the beam qualities including the collimation, the forward directionality, and the beam divergence were verified by detailed analysis of relativistic momentum, angular directionality, and the spatial density map of the accelerated protons.

ROI-based Encoding using Face Detection and Tracking for mobile video telephony (얼굴 인식과 추적을 이용한 ROI 기반 영상 통화 코덱 설계 및 구현)

  • Lee, You-Sun;Kim, Chang-Hee;Na, Tae-Young;Lim, Jeong-Yeon;Joo, Young-Ho;Kim, Ki-Mun;Byun, Jae-Woan;Kim, Mun-Churl
    • Proceedings of the IEEK Conference
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    • pp.77-78
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    • 2008
  • With advent of 3G mobile communication services, video telephony becomes one of the major services. However, due to a narrow channel bandwidth, the current video telephony services have not yet reached a satisfied level. In this paper, we propose an ROI (Region-Of-Interest) based improvement of visual quality for video telephony services with the H.264|MPEG-4 Part 10 (AVC: Advanced Video Coding) codec. To this end, we propose a face detection and tracking method to define ROI for the AVC codec based video telephony. Experiment results show that our proposed ROI based method allowed for improved visual quality in both objective and subjective perspectives.

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