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Thermal Characteristics of a Heat Sink with Bypass Structure for GaN-based Laser Diode (열 우회 구조를 적용한 GaN 레이저 다이오드 패키지의 열특성 분석)

  • Ji, Byeong-Gwan;Lee, Seung-Gol;Park, Se-Geun;O, Beom-Hoan
    • Korean Journal of Optics and Photonics
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    • v.27 no.6
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    • pp.218-222
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    • 2016
  • The thermal characteristics of a laser diode TO package has been analyzed using a commercial computational fluid dynamics (CFD) tool, and the thermal bypass structure was optimized. Comparison of device temperature and the estimated thermal resistance of the resultant structure showed that the bypass structure relieved the thermal bottleneck, and improved the thermal characteristics quite efficiently.

Virtual Design and Construction (VDC)-Aided System for Logistics Monitoring: Supply Chains in Liquefied Natural Gas (LNG) Plant Construction

  • Moon, Sungkon;Chi, Hung-Lin;Forlani, John;Wang, Xiangyu
    • International conference on construction engineering and project management
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    • 2015.10a
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    • pp.195-199
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    • 2015
  • Many conventional management methods have emphasized the minimization of required resources along the supply chain. Accordingly, this paper presents a proposed method called the Virtual Design and Construction (VDC)-aided system. It is based on object-oriented resource control, in order to accomplish a feed-forward control monitoring supply chain logistics. The system is supported by two main parts: (1) IT-based Technologies; and (2) VDC Models. They enable the system to convey proactive information from the detection technology to its linked visualization. The paper includes a field study as the system's pre-test: the Scaffolding Works in a LNG Mega Project. The study demonstrates a system of real-time productivity monitoring by use of the RFIDbased Mobile Information Hub. The on-line 'productivity dashboard' provides an opportunity to display the continuing processes for each work-package. This research project offers the observed opportunities created by the developed system. Future work will entail research experiments aimed towards system validation.

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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.

Perception of Library Personel Towards Socal Media Utilization for Information Service Delivery in University Libraries in Kwara State

  • Saliu Abdulfatai;Aishat Temitope Akinbowale
    • International Journal of Knowledge Content Development & Technology
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    • v.14 no.4
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    • pp.85-99
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    • 2024
  • The study examined perception of library personnel towards social media utilization for information service delivery in kwara state university library. It adopted the descriptive survey design with population consisting of 27 professional librarians in three selected university libraries in kwara State. Total enumerative sampling techniques were used because the population of the study is manageable by the researcher. Percentage and mean were used in analyzing the data. Primary data solicited would be cleaned, coded and entered into the Statistical Package for Social Sciences (SPSS) version 20 software for quantitative analysis. The findings of the study revealed the services rendered by library professional in university libraries in Kwara State, are Current Awareness Services (CAS), Photocopying services, Technical Services, Circulation/borrowing services, Internet services, and Bibliographic verification services. Majority of the respondent indicated Myspace, Google plus, Flickr, Telegram, Twitter, WhatsApp and Facebook are the social media platforms used for service delivery by librarians. Also, majority of the respondents in university libraries indicated Google plus, LinkedIn, Myspace, Skype, WhatsApp, Flickr, WeChat, Twitter and Facebook as social media space use for information service delivery effectively and Bandwidth problem, Limited fund, Lack of maintenance culture, Lack of Awareness, Copyright Issue, Technophobia are the major challenges inhibiting the use of social media for service delivery by the library staff. Lastly, the study concluded with recommendations.

A New Multiple Presence Servers Architecture in SIP Environment (SIP 환경에서의 새로운 다중 프레즌스 서버 구조)

  • Jang, Choonseo
    • Journal of the Korea Society of Computer and Information
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    • v.18 no.4
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    • pp.79-85
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    • 2013
  • In SIP(Session Initiation Protocol) environment, the presence server should process SIP SUBSCRIBE request messages including multiple presence resources addresses from users, and also precess massive notification messages from the subscribed presence resources. The load of the presence server increases as number of users increase, and it limits system extendability. Therefore a new multiple presence servers architecture has been suggested in this research. In this architecture presence servers can be added dynamically and each server's load can be controlled effectively as number of users increase. Each presence server can monitor current load status of entire presence system by using presence event notification package which newly has been suggested in this paper. When a particular presence server's load increases over predefined limit, the presence service processing is distributed by selecting a server which has the smallest load, or by generating a new server dynamically. In this system the overall load of the entire system can be controlled optimally and extendability of the system can be increased. For this purpose a new presence event notification package and presence information data format have been suggested. The performance of the proposed system has been evaluated by experiments. They shows 44.3% increase in SUBSCRIBE message processing time, and 43.1% increase in Notification message processing time.

An Analysis of Relationship between Older Adults' Online Information Activities and their Life Satisfaction (고령층의 온라인 정보활동과 삶의 만족감 관계 분석)

  • Kang, Bora;Kim, Heesop;Lee, Misook
    • Journal of the Korean Society for Library and Information Science
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    • v.48 no.2
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    • pp.159-175
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    • 2014
  • The purpose of this study is to analyze the relationships between the online information activities of older adults and their life satisfaction. Online information activities were categorized into 'information use ability', 'information use time', and 'information device use ability', and the life satisfaction included such as 'feeling of happiness', 'physical condition', and 'economical condition'. A total of valid 341 responses were examined and analyzed to test the research model using SPSS 19 and Amos. It found that the online information use ability and the online information use time had a positive effect to the information device use ability; it showed that the higher the information device use ability the higher their life satisfaction. However, the online information use ability and the online information use time had no effect to the older adults' life satisfaction in this study.

Powdered Infant Formula Packages in Asian Market Examined in Perspective of Food Packaging Functions (식품포장기능의 측면에서 본 아시아 시장에서의 조제분유 포장)

  • Wang, Hong Jiang;An, Duck Soon;Lee, Dong Sun
    • KOREAN JOURNAL OF PACKAGING SCIENCE & TECHNOLOGY
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    • v.22 no.3
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    • pp.59-70
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    • 2016
  • Packaging is thought to contribute to the consumers' purchasing choice of the powdered infant formula products. In Asian market, the products of international and local brands are competing. Evaluation and analysis of food package functions for a variety of brand products will be helpful for the innovative packaging development. Thus, the packaged products of powdered infant formula were collected in Chinese, Indonesian and Korean supermarkets as a typical Asian market and examined in terms of main food packaging functions. Metal cans were the most dominant type of big size package (800-1000 g) while flexible bags were often the common one of medium size (400 g). In general, convenience function was provided in forms of easy opening device and portioning take-out spoon. Information on primary and secondary shelf lives was given besides nutritional facts and use instruction for communication function. The combination of $N_2$ and $CO_2$ was usually employed to protect powdered infant formula in rigid packages, whereas only $N_2$ was used to protect product in most flexible packages.

Utilization Patterns and Determinants of Oriental Medical Services : Focused on the Residents of Taegu City (한방의료의 이용행태 및 이용결정요인 분석 - 일부 대도시 지역주민을 중심으로 -)

  • Yoo Wang-Keun;Ryu Kyung-A
    • Journal of Society of Preventive Korean Medicine
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    • v.4 no.2
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    • pp.1-24
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    • 2000
  • This study was conducted to examine utilization patterns and determinants of oriental medical services. Data were collected from 545 residents in Taegu city The results of this study are summarized as follows 1) 37.8% of subjects used oriental medical services in the past year. Especially, the female, the ages of 50 and 60 over, the single. low-educated. high-income class, white-collar class, medical insured tended to use more oriental medical services than another groups. 2) 46.7% of users of oriental medical services reported that number of visits in the past year was 2 - 5 times 37 1% of them was 1 times, and 4.5% over 10 times. 3) According to the reasons to choose the oriental medical facilities, most was 'on their own judgement'(48.8%) and 'by the advice of relatives and friends'(42.0%) Regarding to the objectives of using oriental medicine, 68.3% was 'treatment', 31.7% 'health counselling and promotion'. And among diseases of users, diseases of musculo-skeletal system was the highest(54.5%). 4) 57.9% of oriental medical services users had experience of utilizing western medicine on the same diseases. Among peoples with experiencing western medicine on the same diseases. 54.4% received oriental medical services 'in addition to western medicine', 45.6%'in place of western medicine 'And 41.2% of using both services reported that they had difficulty in deciding to choose the type of services -oriental medical services or western medicine-for their diseases. 37.3% of them answered that 'providing relevant information' was the most desirable measure to solve this problem, 27.3% 'establishment of effective referral system between oriental and western medical facilities '23.6% 'cooperative medical treatment systems in the same facilities', 11.8%'integration of oriental medicine into western medicine 5) According to the satisfaction level with each items of oriental medical services, the respondents had positive views on efficacy, kindness, and side-effects. They, however, had negative view on the cost of oriental medical services. 6) In regarding to the priority of improvement of oriental medical system,'expansion of insurance benefit package 'ranked first. 'expansion of insurance benefit Package 'ranked second, 'improvement of scientific methods and diagnostic technique 'third, and 'safety of herbal medicine' fourth in order. 7) The significant factors influencing the utilization of oriental medical services were kindness of oriental medical practitioners, efficacy , travel time, age To be brief, utilization rate of oriental medical services in urban area generally tends to be high. There, however, have been various barriers to limit oriental medical services, such as incomplete benefit package of oriental medical insurance and lack of coordination and referral system between oriental and western medical services, lack of scientific diagnostic procedures, high price etc . For the development of oriental medical services, Much attention to remove these limiting factors should be placed. In addition, kindness of oriental medical practitioners , which is expected to be more important factor in the consumer - focused health care environment than ever, should be kept high consistently. Since this study was conducted for specific residents of an urban city. further research including more sampling in different urban areas should be required to generalize the results of the study.

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Influences of Well-being Trend on Color of Packaged Food Products (웰빙트랜드가 식품포장디자인의 색채에 끼친 영향)

  • Shin, Seong-Hoon
    • The Journal of the Korea Contents Association
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    • v.7 no.5
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    • pp.184-192
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    • 2007
  • A social trend can change market trend because it influences on consumer's lifestyle. Therefore the trend has been considered as an important factor for planning and producing new items. If a new trend occurred, its impact on market needs to be examined. Recently, well-being became top global issue and it caused many changes on packaged food products. This study focuses on measuring the impact of well-being trend on package design. The range of products for this research is limited to packaged food product selling in discount stores because it is main category to show well-being trend. Generally, good package design generates impulsive buying at the point of purchase. Colors on packages are critical point for good product design and they are also reflecting social trend to meet their consumers' psychological desires. After gathering basic information from market research, several colors had been selected and classified. For providing specific evidences result from the trend, the role of four major colors have been compared and analyzed. Finally, questionnaire had been handed out to trendy consumers to reach consensus on well-being color.

A Study on the Impact of Hotel Internal Marketing Practices on Culinary Staff Job Satisfaction and Organizational Commitment (호텔기업 내부마케팅활동이 조리종사원들의 직무만족과 조직몰입에 미치는 영향에 관한 연구)

  • Ahn, Sung-Bin;Lee, Jong-Ho
    • Culinary science and hospitality research
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    • v.21 no.2
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    • pp.60-74
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    • 2015
  • This study seeks to determine causal relationships between hotel internal marketing practices and job satisfaction, and ultimately on organizational commitment, to contribute information enabling hotel management to better understand employees working in hotel culinary departments. SPSS 18.0 and AMOS 18.0 were employed for the statistical analysis (e.g. frequency statistics, exploratory factor analysis, confirmatory factor analysis, reliability analysis, and structure equation model). Results revealed that the formulated model showed proper model fit (${\chi}^2=227.154$(df=179), p-value=0.009, CMIN/DF=1.269, RMR=0.013, GFI=0.931, AGFI=0.911, NFI=0.906, CFI=0.978, RMSEA=0.031), and confirmed construct reliability and convergent validity. Three factors (benefit package, educational training, work autonomy) were extracted based on the results of the factor analyses. Specifically, benefit package and work autonomy exhibited an effect on job satisfaction with benefit package asthe most significant factor (t-value 3.311, p<0.001), partially supporting the first hypothesis of this study. In addition, job satisfaction has found to have a positive influence in organizational commitment, confirming the second hypothesis of this study.