• Journal of Conservation Science
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• v.38 no.1
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• pp.14-32
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• 2022

Underwater photographing and image recording are essential for pre-excavation survey and during excavation in underwater archaeology. Unlike photographing on land, all underwater images suffer various quality degradations such as shape distortions, color shift, blur, low contrast, high noise levels and so on. Outcome is very often heavily photographing equipment and photographer dependent. Excavation schedule, weather conditions, and water conditions can put burdens on divers. Usable images are very limited compared to the efforts. In underwater archaeological study in very turbid water such as in the Yellow Sea (between mainland China and the Korean peninsula), underwater photographing is very challenging. In this study, off-site image distortion and color compensation techniques using an image processing/analysis software is investigated as an alternative image quality enhancement method. As sample images, photographs taken during the excavation of 800-year-old Taean Mado Shipwrecks in the Yellow Sea in 2008-2010 were mainly used. Significant enhancement in distortion and color compensation of archived images were obtained by simple post image processing using image processing/analysis software (PicMan) customized for given view ports, lenses and cameras with and without optical axis offsets. Post image processing is found to be very effective in distortion and color compensation of both recent and archived images from various photographing equipment models and configurations. Merits and demerit of in-situ, distortion and color compensated photographing with sophisticated equipment and conventional photographing equipment, which requires post image processing, are compared.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.7
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• pp.92-102
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• 2016

In this study, the systems and standards for temporary equipment and materials established in domestic and foreign countries are examined to provide improvement schemes and to insure their safety. Statistical analyses of the data obtained from the internet and/or field visit surveys of employees working in manufacturing, leasing, and construction companies related to temporary equipment and materials and improvement schemes were conducted to evaluate the implementation of a safety certification system for currently used temporary equipment and materials. This safety certification system has been enforced since 2009, but the number of accidents at construction sites, which are reported by the 'serious accident cases and measures in construction sites' group of the Korea Occupational Safety & Health Agency (KOSHA), has increased. The respondents' answers regarding the suitability of the items, which are required for the safety certification of the equipment and materials, were 'yes (36%)', 'no (30%)', and 'unknown (35%)'. Less than half of the answers regarding the current system were positive and most of the respondents answered that the current system does not reflect the evolution of the construction environment. A system is needed to approve items certified in foreign countries and newly developed materials and items, in addition to the (automatic) registration for the reuse of temporary equipment and materials, and improvements are needed in their safety. In this study, after examining the size and practicability of the items requiring approval from the current system, the certification methods are reevaluated and improvement schemes are provided for the system.

• Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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• 2004.11a
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• pp.539-544
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• 2004

In this study, locational information data acquisited by using the side scan sonar which is more precise than traditional submarine terrain' survey equipment. And the result of exploration through the object area(the East sea), accurate submarine terrain could be deciphered by sounded image. Also, in the future, side scan sonar's application will be maximized for the submarine terrain's sediment investigation to design or construction of ocean facilities.

• Proceedings of the KIEE Conference
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• 1993.07b
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• pp.818-820
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• 1993

In the three phase full-wave thyristor rectifier, heat radiation concentrated at a few thyristor(s), while equipment's output is normal. That is very important on the predictive maintenance or checking including replacement of parts(or modules). Therefore, this report explains the method of effective diagnosis and the reason that firing control modules have to be adjusted accuratly on each phase.

• Proceedings of the KIEE Conference
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• 2007.07a
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• pp.677-678
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• 2007

배전계통의 신뢰도를 추정하기위한 첫 단계는 배전설비의 고장률 분석이다. 고장률 분석을 위한 여러 가지 방법이 있지만, 본 논문에서는 유지보수 담당자들을 대상으로 설문조사를 실시하였고 그 결과를 분석하였다. 설문조사는 지역 및 기후가 배전설비의 수명에 미치는 영향도 및 설비의 예상수명에 대한 질문으로 이루어 졌다. 통계적 관점에서 자료가 충분하지는 않지만 지역 및 기후가 배전설비의 수명에 뚜렷한 영향을 주는 것으로 분석되었다.

• Journal of Distribution Science
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• v.12 no.1
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• pp.5-12
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• 2014

Purpose - The general objective of this study is to explain the governance mechanisms of relational exchanges by considering both economic and relational factors. As regards the relationship between opportunism and governance mechanisms, opportunism was hypothesized as being positively related to the use of the authority mechanism, and negatively related with use of the trust mechanism. Research design, data, and methodology - Purchasing relationships between original equipment manufacturers (OEMs) and their component suppliers were chosen as the empirical setting. Purchasing specialists in each company, who interact regularly with suppliers and have the major responsibility for managing the exchange relationships with suppliers, were used as the respondents for this study. A mail survey methodology was employed to collect data in the final field survey. Results - As predicted, opportunistic behavior is found to be negatively related to the use of the trust mechanism and positively related to the use of the authority mechanism. Therefore, the result supports the proposed hypotheses. Conclusions - By integrating research streams, this study contributes to the marketing discipline by improving our understanding of when and why different mixtures of governance mechanisms are used.

• Journal of the Korean housing association
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• v.8 no.2
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• pp.135-145
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• 1997

The purpose of this study was to investigate the space feature of private kindergarten in Taegu city. This study was conducted by means of the observation on the equipments, the actual measurement of space of kindergarten and environment, and the questionnaire survey by the chief of kindergarten. The samples for analysis were 20 kindergartens on Taegu city. The Major findings were as follows :1) The chiefs of kindergartens were generally satisfied with the whole range of institutions and it's management.2) Generally the environmental coditions were satisfactory, but the design of the equipments had no consideration for children's body size.3) According to observation on the equipment, it was found that generally environment of kindergarten were desireable.

• Korean Journal of Organic Agriculture
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• v.21 no.1
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• pp.49-59
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• 2013

The Purpose of this paper is to analysis on farmer's awareness and satisfaction level of the project for developing large-scale environment-friendly agricultural districts (LSEAD). To analysis farmer's awareness and satisfaction level, a series of farm household surveys were conducted on farmers, take part in the project for developing LSEAD. The sample size of the survey is 80 respectively. As a survey result, awareness and practical use of facilities & equipment shows a little different outcome. Satisfaction level of the project for developing LSEAD is summarized as follows. Influence on disposal of livestock excretions and farmer's consciousness change appears 4.47 and spreading environment-friendly agriculture 4.44, distribution of environment-friendly agricultural product 4.33, and demand of environment-friendly agricultural materials 4.04. In order to sustainable development of LSEAD, a governance system should be established.

• Proceedings of the Korea Concrete Institute Conference
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• 1996.04a
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• pp.363-369
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• 1996

PMS(Pavement Management System) is the effective and efficient decision making system to provide pavements in an acceptable condition at the lowest life-cycle cost. As the highway system become larger, the necessity of the PMS in increasing. As of December 1995, the 3rd stage of PMS project was completed. The accomplishment of the research work can be itemized to the followings : $\bullet$ Calibration of PMS submodules (1) Pavement Condition Evaluation Model (2) Pavement Distress Prediction Model (3) Pavement Performance Prediction Mode (4) Selection of Pavement Rehabilitation Criteria (5) Optimization Technique for PMS Economic Analysis $\bullet$ Development of Computer Program to Implement PMS Logic $\bullet$ A Study to Implement the Automized Pavement Condition Survey Equipment to PMS $\bullet$ PMS Test Run $\bullet$ Development of PMS Operation Guideline $\bullet$ The 2nd Pavement Condition Survey for Long-Term Pavement Performance Monitoring.

• Journal of Korea Association of Health Promotion
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• v.1 no.1
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• pp.34-37
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• 2003

The NGO program of "intestinal parasite Control among primary Schoolchildren of Lao PDR", supported by KOICA and implemented by KAHP, has started in 1999 and will be executed until 2004. Under cooperation of the LAo Ministry of Health, WHO, Korean Embassy and KOCIA, for the last 4 years, KHIP has conducted parasitological survey throughout the country, supply of medical equipment and anti-helminthics and treatment of positive people. The results of the survey is as below : A total of 29,846 stool specimens were collected from primary schoolchildren from May 2000 to June 2002 and examined once with the cellphone thick smear. By species, the rate for Ascaris lumbricoides was 34.9%, hookworm 19.1%, Trichuris trihiura 25.8%, Opisthorchis iverrini 10.9%, Taenia spp. 0.6% and Hymenolepis spp. 0.1%. The northern mountainous regions showed a higher prevalence of soil-transmitted helminths. The regions along the Mekong River such as Khammuane, Saravane or Svannakhet Province showed a higher prevalence of fish-borne parasites.