• Special Issue of the Society of Naval Architects of Korea
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• 2015.09a
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• pp.50-55
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• 2015

Application of newly conceptualized Anti-Splash Devices designed for COT vent pipes were studied on a P/V valve located on the upper deck of an oil carrier vessel. Anti-Splash devices are used in the shipbuilding industry in order to avoid oil overflow and spray accidents caused by excess pressure and vacuum condition in the cargo oil tanks. These conditions are caused by the transverse and longitudinal sloshing forces that arise from ship motion during sea voyages. The main issue with existing Anti-Splash device model is flux at the outlet of the Anti-Splash Device, and so, new conceptual models for the Anti-Splash device were developed and compared to existing Anti-Splash device model using CFD analysis. Transient analysis was used to capture the flow and velocity of each model and a comparative analysis was performed between old and new-concept models. This data was used to determine the optimal design parameters in order to develop an optimized Anti-Splash Device. A Factory acceptance test was performed on the new-concept models in order to verify the performance and efficiency against their design requirements and other criterion. The final step performed was to apply the optimized Anti-Splash Device models for COT vent pipes to an actual vessel and verify performance through a seawater cargo operation during a sea voyage as per the ship owner's request. The patent for the aforementioned device was obtained by the Korean Intellectual property Office dated Dec. 18th,2014.

• Proceedings of the KAIS Fall Conference
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• 2009.12a
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• pp.379-381
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• 2009

대덕 바이오클러스터의 네트워크를 파악하기 위하여 한국특허정보원의 KIPRIS 서비스를 이용하여 한국특허정보를 분석하였다. 공동출원 한 특허에 대하여 샐튼지수(Shalton index)를 구하여 연구개발 주체 간의 연관성과 기술 간의 연관관계에 의하여 R&D network model을 제시하였다. 본 모델에 의하면 벤처기업 간 공동연구가 가장 활발하였고 벤처기업들은 대학보다는 연구기관을 선호하였다. 과학 기술지식의 산업으로의 확산을 위해서는 대학이나 출연연구소의 네트워크가 더욱 활성화되어야 한다. 일부 벤처기업이 대덕특구의 연구기관과 공동연구가 활발하였지만 특구내의 연구추체보다는 타 지역의 기업, 벤처기업, 대학과의 공동연구가 많이 이루어지고 있었다. 샐튼지수에 의하여 기술 간 연관성 분석 한 결과는 생물자원탐색 기술, 세포배양, 유전공학과 같은 기초분야를 모체로 네트워크가 형성되고 있다. 생물의약분야는 기술우위가 약하므로 이의 경쟁력 확보를 위한 네트워크가 절실히 요구되고있다. 과학기술문헌이나 특허자료를 이용한 계량서지학적 분석방법은 R&D 네트워크 구축을 위한 전략 수립에 있어 효과적인 방법으로 이용될 수 있다.

• Proceedings of the KSPS conference
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• 2007.05a
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• pp.146-148
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• 2007

Studies of cry characteristics in the newborn infant were aimed to determine if cry analysis could be succesful in the early detection of the infant at risk for developmental difficulties. Crying presupposes functioning of the respiratory, laryngeal and supralaryngeal muscles. The nervous system controls the capacity, stability, and co-ordination of the movements in these muscles. Hence, the cry provides information about how the Nervous System is functioning. 3 patients(down syndrome, cornelia de lange syndrome, Patent ductus arteriosus) were assessed through a Computerized Speech Lab (CSL). Tests had been chosen to assess Fundamental frequency(mean, maximum, minimum values), Melody contour, NHR, Energy. We compared the data from patients and healthy volunteer. Variations in cry characteristics were documented in a number of medical abnormalities.

• Steel and Composite Structures
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• v.19 no.6
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• pp.1483-1499
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• 2015

With the improvement of the quality of construction materials and the development of construction technologies, large-scale long-span steel frame buildings have been built recently. The P.E.B system using tapered members is being employed as an economically-efficient long-span structure owing to its advantage of being able to distribute stress appropriately depending on the size of sectional areas of members. However, in December 2005 and in February 2014, P.E.B buildings collapsed due to sudden loads such as snow loads and wind gusts. In this study, the design and construction of the P.E.B system in Korea were analyzed and its structural safety was evaluated using the finite element analysis program to suggest how to improve the P.E.B system in order to promote the efficient and rational application of the system.

• Journal of the Korea Society of Computer and Information
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• v.23 no.12
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• pp.179-184
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• 2018

In this paper, we have proposed the development of DC-DC converter for LRT power supply. First of all, we have studied converter technology, main functions and characteristics were determined. In also, the converter design was carried out to meet the system design conditions. Based on this design, converter simulation is performed to enable stable charging and discharging of the vehicle system. We have performed the Light-load test according to charge mode, discharge mode. As a result, the manufactured converter performance was verified through the load test, and it's stability was confirmed.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.3
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• pp.1213-1222
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• 2011

The aim of this research is to map the intellectual structure of the field of LED and optics during the period of 2000-2009. We utilize the scientometric tool of co-word analysis to reveal patterns and trends in the LED and optics field by measuring the association strengths of keywords (or IPCs). Data were collected from Science Citation Index Expanded (SCIE) and United Stated Patent and Trademark Office (USTPO) for the period of 2000-2009. Keywords were extracted from abstracts and further standardized using thesaurus. In order to trace the dynamic changes of the LED and optics field, the whole 10-year period was separated into two consecutive periods: 2000-2004 and 2005-2009. The results show that the LED and optics field has some established research themes and it also changes to embrace new themes.

• Resources Recycling
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• v.17 no.4
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• pp.66-76
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• 2008

Silicon wafer is used in making semiconductor device of various forms in the semiconductor industry. Silicon wafer is produced by cutting silicon ingot and sludge containing silicon results from cutting process. The amount of silicon sludge is increasing owing to the usage of semiconductor device in many industry sectors. These days the recycling technologies of the waste silicon sludge has been widely studied from view point of economy and efficiency. In this study, patents on the recycling technologies of the waste silicon sludge were analyzed. The range of search was limited in the open patents of USA, European Union, Japan, and Korea up to september, 2007. Patents were collected using key-words and filtered by filtering criteria. The trend of the patents was analyzed by the years, countries, companies, and technologies.

• Journal of the Korean Data and Information Science Society
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• v.24 no.5
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• pp.999-1011
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• 2013

In this research, we propose a document recommendation method which can find documents that are relatively important to a specific document based on citation information. The key idea is parameter tuning in the Neumann kernal which is an intermediate between a measure of importance (HITS) and of relatedness (co-citation). Our method properly selects the tuning parameter ${\gamma}$ in the Neumann kernal minimizing the prediction error in future citation. We also discuss some comutational issues needed for analysing large citation data. Finally, results of analyzing patents data from the US Patent Office are given.

• Journal of Korea Technology Innovation Society
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• v.19 no.1
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• pp.80-104
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• 2016

Existing methodologies of technology planning about promising new technology focused on target technology itself, so it is true that socio-environmental context which the relevant technology has influence on is not well understood. In this respect, this study is aimed to questingly examine that news content analysis methodologies widely available in the field of science communication can be applied as a complementary methodology for contextual understanding of socio-environment in terms of technology planning about promising new technology. In the co-evolutionary environment of technology-society, promising new technology shows hype phenomenon regarding the relation with the society. Based on this, this study performed news content analysis and examined if the consequences of analysis would match hype cycle. It tried to explore substantive content understanding by socio-environment factors according to specific news frame content. To do this, new content analysis was performed targeting cloud computing as a representative promising new technology. The result of news content analysis targeting general newspapers, business news, IT special newspapers revealed that the tendency of news reporting matched the trend of hype cycle. Particularly, it was verified that reporting attitude and news frame analysis provided useful information to understand contextual content depending on social, economic, and cultural environment factors about promising new technology. The results of this study implied that news content analysis could overcome the limitation of technology information analysis focusing on academic journal patent usually applied for technology planning and could be used as a complementary methodology for understanding the context depending on macro-environment factors. In conclusion, application of news content analysis on the phase of macro-environment analysis of technology planning could contribute to the securement of mutually balanced view in the co-evolutionary perspective of technology-society.

• Management & Information Systems Review
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• v.32 no.3
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• pp.263-283
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• 2013

Recently, social enterprises in the korean are gaining more interest but, it seems that many social enterprises are not successful in their sustainability. Therefore government implements various supporting policies for social enterprise. The purpose of this paper is to find new criteria of business development expense through the analysis of submitted application of business development expense. For this study, business development expense data of 126 social enterprises(applied to the Busan in 2013 year) for supporting money are analyzed. The result shows that (1) need to apply 1 or 2 business that is the most important in their business (2) concerns about the patent, engineering development, prototype model development, program development taken IT business are very desirable (3) need to feedback about last year result (4) need to make more elaborate guideline for application (5) none of social enterprise applied co-marketing (brand), therefore a strong inducement plan is need In conclusion, effective and strategic policy of business development expense will be a helpful for the sustainability of social enterprises. In this sense, the results of this study is meaningful to the social enterprise policy, especially business development expense, maker.