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Progress of the StereoLithography Product's Shape Accuracy by Temperature Control of the Resin (광경화성 수지의 온도 제어에 의한 광조형물의 형상 정밀도 향상)

  • 김성환;이은덕;백인환
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2000.05a
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    • pp.808-811
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    • 2000
  • The product of stereolithography is consist of gathering the single strand. Therefore the accuracy of the shape is related to the linear shrinkage of the single strand. The resin temperature change affect on curing properties. This article will propose the interaction between material temperature and shape accuracy by resin temperature control. The main concern of this article is related to the improvement of end product's shape accuracy by the persuit for the filles curing criterion.

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The Effect of Network Position on the Efficiency of Open Collaboration: A Study of Wikipedia Featured Article Edits

  • Naveed Khan;Jongwoo Kim;Hong Joo Lee
    • Asia pacific journal of information systems
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    • v.29 no.1
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    • pp.50-64
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    • 2019
  • The success of Wikipedia is due to the large number of volunteers collaborating to provide content to Wikipedia articles. In this paper, we study the effect of network position on the promotion of an article to a featured article. We focus on the edits of featured Wikipedia articles to study the effects of the centrality of editors and centrality of articles on the promotion of featured articles. Considering the editing precedence among editors within an article, editor collaboration networks for a single article are generated using the total English-written featured articles on Wikipedia. In addition, based on the affiliation network of editors and articles, an article-to-article network and an editor-to-editor collaboration network are constructed. Based on the investigation of the networks, we find that article centrality in an article-to-article network has a negative effect on the promotion of an article, and editor centrality in an article-to-article networks has a positive effect on promotion. In addition, editor centrality in an editor-to-editor network has a negative effect on promotion. Some theoretical and managerial implications are provided in view of these results.

Recent Progress of Spray-Wall Interaction Research

  • Lee Sang-Yong;Ryu Sung-Uk
    • Journal of Mechanical Science and Technology
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    • v.20 no.8
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    • pp.1101-1117
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    • 2006
  • In the present article, recent progress of spray-wall interaction research has been reviewed. Studies on the spray-wall interaction phenomena can be categorized mainly into three groups: experiments on single drop impact and spray (multiple-drop) impingement, and development of comprehensive models. The criteria of wall-impingement regimes (i.e., stick, rebound, spread, splash, boiling induced breakup, breakup, and rebound with breakup) and the post-impingement characteristics (mostly for splash and rebound) are the main subjects of the single-drop impingement studies. Experimental studies on spray-wall impingement phenomena cover examination of the outline shape and internal structure of a spray after the wall impact. Various prediction models for the spray-wall impingement phenomena have been developed based on the experiments on the single drop impact and the spray impingement. In the present article, details on the wall-impingement criteria and post-impingement characteristics of single drops, external and internal structures of the spray after the wall impact, and their prediction models are reviewed.

One Hundred Scopus Citations to a Non-Scopus Indexed Article: A Case Study

  • Bakthavachalam Elango
    • Journal of Information Science Theory and Practice
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    • v.11 no.4
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    • pp.82-91
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    • 2023
  • Receiving 100 citations from indexed journals is not a common occurrence, although it does happen very rarely, and it is even more uncommon for a non-indexed article. Given this, the purpose of this present study is to perform a bibliometric analysis of 100 cited Scopus articles to a non-Scopus indexed article, using a case study of the article titled "Authorship trends and collaboration pattern in the marine sciences literature: A scientometric study" which was published by Elango and Rajendran in the International Journal of Information Dissemination and Technology in 2012. On October 15, 2022, the Scopus database was searched with the article title in the references field, and the resulting bibliographic data was exported as a comma-separated values file. The tools utilized for this analysis were ScientoPy, the Bibliometrix R Package, and VOSviewer. Based on the findings, most of the cited articles were published within the last three years, and international researchers have given more recognition compared to Indian researchers. The most popular topics were found to be bibliometrics, bibliometric analysis, and bibliometrix. The fact that all 100 cited articles were published across various subject disciplines used by Scopus to categorise sources demonstrates how well-established the citing article is within the scientific community.

The Political Dynamics of Policy Networks and Advocacy Coalitions in South Korea's Healthcare Policymaking : The 20 Years of Debates to Inaugurate a Single-Payer System (한국에서의 의료보험조합 통합일원화 논의의 정치 : 정책 네트워크, 옹호연합, 그리고 보건의료 정책형성의 동태성)

  • Kim, Soon‐yang
    • Korean Journal of Social Welfare Studies
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    • v.42 no.4
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    • pp.61-102
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    • 2011
  • The purpose of this article is to anatomize the political dynamics of South Korea's healthcare policymaking through the integrative analytical framework combining the policy network perspective and the advocacy coalition theory. This framework is expected to be advantageous to the analysis of Korea's turbulent healthcare policy change from a systematic and process-driven point of view. A target of analysis is the two decades of turbulence to transform the health insurance system into a single payer system. Through the analysis, this article tries to illuminate the dynamics of Korea's healthcare policymaking, by connecting environmental context, policy networks, advocacy coalitions, and policy outputs. For a case study, this article classifies the debates to inaugurate a single payer system into four sub-phases and conducts longitudinal comparative research.

Understanding radiation effects in SRAM-based field programmable gate arrays for implementing instrumentation and control systems of nuclear power plants

  • Nidhin, T.S.;Bhattacharyya, Anindya;Behera, R.P.;Jayanthi, T.;Velusamy, K.
    • Nuclear Engineering and Technology
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    • v.49 no.8
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    • pp.1589-1599
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    • 2017
  • Field programmable gate arrays (FPGAs) are getting more attention in safety-related and safety-critical application development of nuclear power plant instrumentation and control systems. The high logic density and advancements in architectural features make static random access memory (SRAM)-based FPGAs suitable for complex design implementations. Devices deployed in the nuclear environment face radiation particle strike that causes transient and permanent failures. The major reasons for failures are total ionization dose effects, displacement damage dose effects, and single event effects. Different from the case of space applications, soft errors are the major concern in terrestrial applications. In this article, a review of radiation effects on FPGAs is presented, especially soft errors in SRAM-based FPGAs. Single event upset (SEU) shows a high probability of error in the dependable application development in FPGAs. This survey covers the main sources of radiation and its effects on FPGAs, with emphasis on SEUs as well as on the measurement of radiation upset sensitivity and irradiation experimental results at various facilities. This article also presents a comparison between the major SEU mitigation techniques in the configuration memory and user logics of SRAM-based FPGAs.

Single Mother Family's Family Resources, Coping and Stress (편모가족의 가족자원, 대처와 스트레스)

  • 김경신
    • Journal of the Korean Home Economics Association
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    • v.35 no.4
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    • pp.211-228
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    • 1997
  • The purposes of this article were to find the general trends of single mothers and their children's stress family resources and coping to estimate the correlation among variables and to analyze the effects of related variables family resources influencing coping and stress. The data were analyzed from the 566 single mothers and their children living in Kwang-ju. The major findings were as follow; 1. Scores of single mothers' and their children's stress family resources were lower than median. But scores of single mothers' coping were higher than median. Their problem-solving coping were higher than emotional coping. 2. Widowed single mothers' stress were related to family resources and emotional coping. Divorced single mothers' stress were related to emotional coping. Children's stress were related to emotional coping. Single mother's stress coping were related to stress of children. 3. Single mothers' coping were influenced by financial well-being family strength I and family strength II. Children's coping were influenced by number of friend. Single mothers' stress were influenced by education financial well-being. Children's stress were influenced by their mothers' education friendship satisfaction and school achievement satisfaction.

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A Study on an Energy-Effective Site Planning for a Residential Environment(II) (에너지 절약형 주택단지 설계기법에 관한 연구 (II))

  • 양병이;김기호
    • Journal of the Korean Institute of Landscape Architecture
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    • v.13 no.1
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    • pp.25-42
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    • 1985
  • The objective of this article is to develop residential site planning techniques for the energy conservation by focusing on energy conscious site design process, influencing natural factors for energy conservation and suggestion of multi - family housing Prototypes. This article is the second part of the article titled "A Study on an Energy - Effective Site Planning for a Residential Environment"which is published in the previous issue (Vol. 12, No. 2) of this journal. The first part of the article dealt with how to make best use of energy conserving effect of natural forces such as sun, wind and water, and the selection techniques of suitable residential site for achieving energy conservation. The second part proposes the energy conscious design process of residential site development and suggests building forms of single family and multi -family housings. The three multi - family housing prototypes haute been developed which are most energy -effective ; the linear type, the cut -de -sac type and the atrium type. In the process of creating the prototypes, energy conserving design criteria have been also developed. These criteria can be used to develop some other alternative prototypes.

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A hollow definitive obturator fabrication technique for management of partial maxillectomy

  • Patil, Pravinkumar Gajanan;Patil, Smita Pravinkumar
    • The Journal of Advanced Prosthodontics
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    • v.4 no.4
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    • pp.248-253
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    • 2012
  • Maxillary obturator prosthesis is the most frequent treatment option for management of partial or total maxillectomy. Heavy weight of the obturators is often a dislocating factor. Hollowing the prosthesis to reduce its weight is the well established fact. The alternate technique to hollow-out the prosthesis has been described in this article which is a variation of previously described processing techniques. A pre-shaped wax-bolus was incorporated inside the flasks during packing of the heat-polymerized acrylic resin to automatically create the hollow space. The processing technique described is a single step flasking procedure to construct a closed-hollow-obturator prosthesis as a single unit. To best understand the technique, this article describes management of a patient who had undergone partial maxillectomy secondary to squamous cell carcinoma rehabilitated with a hollow-obturator prosthesis.

Single Mothers' Stress and Psychological Well-being (편모의 스트레스와 심리적 복지)

  • 김경신
    • Journal of the Korean Home Economics Association
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    • v.36 no.2
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    • pp.19-34
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    • 1998
  • The purposes of this article were to find the general trends of single mothers' stressor, self-esteem, family resources, coping, stress and psychological well-being, and to test a causal model of family resources, coping and stress influencing on psychological well-being. The data were analyzed from the 283 single mothers living in Kwang-ju. The major findings were as follows; 1. Scores of single mothers' stress, family resources were lower than median. But scores of single mothers' stressor, self-esteem, coping, life satisfaction and depression were higher than median. Their problem-focused coping scores were higher than emotion-focused coping. 2. Single mothers' life satisfaction were directly affected by self-esteem, family resources, problem-focused coping and stress, and were indirectly affected by stressor, emotion-focused coping. Single mothers' depression were directly influenced by self-esteem, family resources, emotion-focused coping, problem-focused coping and stress, and were indirectly influenced by stressor.

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