• Imaging Science in Dentistry
• /
• v.35 no.2
• /
• pp.87-90
• /
• 2005

Purpose : The purpose of this study was to investigate variability of doses with same exposure parameters and evaluate radiographic density according to the variability of doses. Materials and methods Twenty-eight MAX-GLS (Shinhung Co, Seoul, Korea), twenty-one D-60-5 (DongSeo Med, Seoul, Korea), and eleven REX-601 (Yoshida Dental MFG, Tokyo, Japan) dental x-ray machines were selected for this study Surface doses were measured under selected combinations of tube voltage, tube current, exposure time, and constant distance 42 cm from the focal spot to the surface of the Multi-O-meter (Unfors Instruments, Billdal, Sweden). Radiographic densities were measured on the films at maximum, minimum and mean surface doses of each brand of x-ray units. Results With MAX-GLS, the maximum surface doses were thirteen to fourteen times as much as the minimum surface doses. With D-60-S, the maximum surface doses were three to eight times as much as the minimum surface doses. With REX-601, the maximum surface doses were six to ten times as much as the minimum surface doses. The differences in radiographic densities among maximum, mean, and minimum doses were significant (p<0.01). Conclusion : The surface exposure doses of each x-ray machine at the same exposure parameters were different within the same manufacturer's machines.

• Proceedings of the KIEE Conference
• /
• 2005.07e
• /
• pp.55-57
• /
• 2005

Along with the development of the industrial society, as the transportation of water which is the indirect capital of society and petroleum, gas, etc used as energy sources is rapidly increased. the underground material is being expanded. Like this, the pipes laid under the ground not only bring the corrosion to the land circumstances to reduce the life of the pipes, but also raise the social problem of leakage accidents and the economic loss by Pin Hole. By reason of this, for the purpose of protecting the corrosion of the underground material, we are constructing and operating the electrolytic protection facilities. In case of a region of which specific resistance is high, however, we are not keeping proper protection potential(that is -850mV) to get protection effects. In this study, for the water pipes that under-voltage phenomena occur in the protection potential, we made a spot survey on the under-voltage section and normal-voltage section, compared, analyzed each of the contents and examined the under-voltage causes of the protection potential.

• Journal of Korean Clinical Health Science
• /
• v.4 no.4
• /
• pp.671-679
• /
• 2016

Purpose. This research study is to understand the effects of field (clinical) Practice on employment choice and decision. Method. The research study conducts a questionnaire survey of trainees who received field (clinical) Training during the period of 2016 summer vacation to analyze the data, utilizing Likert 5 rating scales and conduct a statistical analysis with the tool of SPSS 18.0. Results.. As for the satisfaction of the participation of Practice, girl students account for the high rate (75.1%) compared with boy students (61.7%). Regarding the satisfaction of each Practice spot, ophthalmic clinic reaches the high rate (77.8%) compared with optical shop (65.7%). Practice about practice courses (53.2%) of regular subjects have somewhat close correlations compared with theory courses (46.8%). 75.2% of respondents in the group that shows the high satisfaction of the participation of Practice replied that they would decide employment as an academic major after Practice. And the figure is proved to assume a high ratio. Conclusion. The analytic research outcome indicates that those trainees who received Practice in an ophthalmic clinic have higher satisfaction than those who received Practice in an optical shop. There is the high accomplishment of employment in relation to academic major area instead of other area, after Practice.

• Journal of the Korea Safety Management & Science
• /
• v.14 no.1
• /
• pp.53-63
• /
• 2012

The purpose of this study is to grasp foreign worker's industrial safety and health state, which find out the improvement to secure the basic safety net for foreign workers. We have investigated 2,050 workers through direct interviews during the period from April 12, 2010 to May 31, 2010. And the result of analysis, foreign worker's daily average working time is 10.6 hours(40.8% workers in total work 10~12 hours), the extent of exposure to harmful and dangerous working environment is 'the position which cause pain in neck, waist, hands, shoulders, legs'(69.3%), 'repetitive hands and arms movement'(66.1%). It showed 'experience of accident damage or disease related work'(27.3%), 'never apply for industrial accident compensation' is revealed high at 73%. As a result of completing a safety health education for a year, it showed 'never educated'(40.2%), 'the institute that foreign workers have used for help and advice is the foreign worker's support center'(61.9%) Thus, hiring foreign workers in the company are small in site, the environment is too harmful and dangerous. In addition, no safety and health managers, legally blind spot located in the health and safety, because it is an urgent meet for these measures to improve.

• Journal of the Speleological Society of Korea
• /
• no.92
• /
• pp.19-30
• /
• 2009

The purpose of this paper work is to establish the plans of Gyeongju' identity through the activation of various culture tourism which for literature, narrative, experience and others in company with history tourism. And so first of all we are examined thoroughly the literature related to the characteristics of urban identity and the spot marketing in our country for establishing of this work. And then also we are carried out survey about the cases of Pyeongchang-gun where built around Hyo-seok Lee and Namwon where is too well known the tale of Chunhyang and then make surveyed the actual locale on Gongju and Buyeo in which the old capital of Baekjae. On the other hand the paper work are suggested the plans that Gyeongju' identity has been settled such as the historic culture tourism city of the various culture tourism programs by using of SWOT analysis.

• Korean Institute of Interior Design Journal
• /
• v.15 no.3 s.56
• /
• pp.3-13
• /
• 2006

It is obviously true that the aspects of interior designs in current use have been combined with changing trends and developed and handed down throughout centuries. An examination of respective characteristics of spaces where Korean presidents have lived during their terms of office could get a useful clue by which both traces of Korean modernism and senses of modeling can be perceived. However, there are not enough literatures that can be verified. Therefore, it would be especially meaningful to find out and analyze documents unearthed. The purpose of this study is to consider the expressiveness of interior designs of presidential residence and office which have been combined with changing trends and developed, while classifying respective cases during presidential tenure by periods of Joseon Government general, U. S military administration, the first Republic, the second Republic, the third and the fourth Republic, the fifth Republic, and the sixth Republic, examining relevant literatures, photos, drawings and making on-the-spot survey. The study is also intended to get a better understanding of the aspects and the features of interior designs shown in presidential residences and offices that are not so much made known due to uneasy access to archives and to document the resources buried in oblivion and to consider the historical meanings.

• Journal of the Korean Institute of Landscape Architecture
• /
• v.23 no.2
• /
• pp.29-43
• /
• 1995

In this study on the creation of parks in North Korea, which is closely re]toted to the developmental stages in North Korea, park construction plans are investigated according to the following periods: 1) from the Liberation of Korea in 1945 to the outbreak of the Korean War, 2) from the end of the Korean War to the 1950's, 3) 1960's and 4) 1970's and 1980's Major North Korean parks are also presented and common characteristics of park-making in North Korea are analyzed in the following way : 1) the character and function of the parks, 2) the development of landscaping, 3) the creation of unique North Korean parks. This study was conducted through archival research of North Korean documents and it may be limited due to the intrinsic problem of reliability that the documents have, and also to an impossoble on-the-spot survey. However this study is of value because it presents North Korean parks, as yet unpublished in South Korea, and it can be used as valuable information for further study and especially for the planning of parks and green space system in preparation for a probable unified Korea. For a profound stuffy, broader and more accurately detailed North Korean documents must be obtained and opened to the public. A comparative study on the principles of spatial composition and design elements of the parka in South and North Korea mutt also be conducted so as to find a model for the Korean park for a future unified Korea.

• Journal of the Korean Institute of Rural Architecture
• /
• v.6 no.3
• /
• pp.63-74
• /
• 2004

This study is focusing on the Nagan Folk Village, primarily because of its historical and cultural values. The purpose of this study, accordingly, analysis the fact of the dwelling change through spot-survey and case-investigation, and is to find a way to improve for the rational preservation of the traditional dwelling analyzing on the actual condition and the reason for such changes in the Nakan Folk Village. The dwelling change is stemmed from the physical factors, and some modifications of internal composition, exterior formation, building equipment. As a result, The changes of internal composition are included in the reduction of garnering room, the enlargement of bed/service room, the establishment of mechanical room. The changes of exterior formation with structural material are included in the glass door for the internalization of 'TOEMARU', the extra glass door for the brightening of room, the cement plastering for the endurance of wall. The changes of building equipment are included in the establishment of oil-boiler, wash closet, sink for convenient life All houses should be graded on their qualitative value, managed in a cycle. And its own criterion for acceptable deformations should be established.

• Journal of the Korea Institute of Building Construction
• /
• v.9 no.4
• /
• pp.75-83
• /
• 2009

Although a range of machine excavation methods are in wide use, including casing, earth drill and reverse circulation drilling, deterioration in pile quality and faulty construction can be often found these days because of trouble in the construction field. For this study, research was conducted in the form of a survey of construction engineers working in the field in order to identify the types and the causes of trouble by focusing on all casing, earth drilling and reverse circulation drilling. By analyzing the causes of trouble, countermeasures could be presented. The data and the analysts presented in this study could be effectively used for minimizing trouble in future machine excavation work during construction.

• International Journal of Contents
• /
• v.12 no.2
• /
• pp.58-65
• /
• 2016

This paper describes design and development of a system that supports continuous creation of hazard maps by local residents in their daily life. We made an interview survey to design our system in a model traditional town in Saga, Japan. The results show that in spite of continuous efforts, many practical problems remain and residents feel unsafe. Based on these results, we designed and developed a unique ICT-based support system which contributes to community-based disaster prevention/reduction. The continuous resident participation and posting design are core concept for our sustainable community-based approach. Our system continues to support making a hazard map by integrating the community-based hazard information. Local residents register information about the spot (disaster types, a risk level, a photograph, comments, positional information) that can be dangerous in case of disaster. We have evaluated the usefulness and possibilities of our prototype system implemented as an iOS application.