• Journal of the Korean Operations Research and Management Science Society
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• v.33 no.4
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• pp.31-51
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• 2008

Predicting the preferences of users and providing the personalized services/products based on users' preferences is one of the important issues. However, the research considering users' preferences on context-aware computing is a relatively insufficient research field. Hence, this paper aims to propose a framework for providing the personalized services based on context history in context-aware computing. Based on this framework, we have implemented a prototype system to show the feasibility of the framework. Previous researches have reasoned the preferences of the user considering only the user's input, but this research provides the personalized services using the relationship between users' profile and services.

• Journal of Educational Research in Mathematics
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• v.9 no.1
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• pp.217-228
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• 1999

The fundamental theorem of calculus is the most 'fundamental' content in teaching calculus. Since the aim of teaching the theorem goes beyond simple application of it, it is difficult to teach it meaningfully. Hence, for the meaningful teaching of the fundamental theorem of calculus, this article seeks to find the educational implication of the fundamental theorem of calculus through reviewing the genetic history of it. A genetic history of the fundamental theorem of calculus can be divided into the following five phases: 1. The deductive discovery of the fundamental theorem of calculus 2. Galileo's Law of falling body and the idea of the fundamental theorem of calculus 3. The discovery of the fundamental theorem of calculus and Barrow's proof 4. Newton's mensuration 5. the development of calculus in 19th century and the fundamental theorem of calculus The developmental phases of the fundamental theorem of calculus discussed above provides the three educational implications. first, we can rediscover this theorem through deductive methods and get the ideas of it in relation to kinetic problems. Second, the developmental phases of the fundamental theorem of calculus shows that the value of this theorem lies in the harmony of its theoretical beauty and practicality. Third, Newton's dynamic image of this theorem can be a typical way of understanding the theorem. We have different aims of teaching the fundamental theorem of calculus, according to which the teaching methods can be adopted. But it is self-evident that the simple application of the theorem is just a part of teaching the fundamental theorem of calculus. Hence we must try to put the educational implications reviewed above into practice.

• Journal of architectural history
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• v.14 no.3 s.43
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• pp.23-37
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• 2005

The purpose of this study is to clarify the characteristics of the ancient architectures of the Yuan Dynasty(元代). The result is expected to efficient for a basic data to research history of the Koryo(高麗) architectures. This study was focused on the architecture of the Yuan dynasty in Hancheng city, because the buildings of the Yuan Dynasty were remained in Hancheng city(韓城) of Shanxi province(陝西) in the largest numbers through all China territory. And the study was especially analyzed in the angle of the system of wooden structures among various architectural points. It was looked into, in large, views of form of whole structure and, in detail, joining method of detail parts. As a result of the study, the characteristics of architectures of the Yuan Dynasty in Hancheng city were summarized as follow a reduction of the unit size, a shifting of columns, a removal of columns and a simplicity of ornaments. These are different with architecture of other empire periods. Also, these are the characteristics of the Korean tradition at architectures. This study of the Yuan's architectures of Hancheng is expected to be the basis of the advanced study about the relationship between Koryo(高麗) architectures and Yuan(元) architectures.

• Journal of architectural history
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• v.21 no.3
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• pp.93-108
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• 2012

This study is one that estimates the architectural composition as well as the location of guest house of Haemi Eupseong on the basis of the analysis of modern and contemporary data related to Haemi Eupseong. It is significant that this study has presented an opinion that can become a practical basis for the historical research of the prototype of Haemi Eupseong of the late Chosun Dynasty through the analysis of modern and contemporary data that had been unsatisfactory among the fruition of studies conducted in relation to Haemi Eupseong. The outcomes achieved by this study are as follows. Firstly, it was verified that the guest house of Haemi Eupseong that has been restored is one that has different architectural composition than the prototype of the late Chosun Dynasty and is restored in a different location. Secondly, in respect of architectural composition of guest house found by the analysis of the picture, it was confirmed that the government office has one step higher than the double-wing house in the form of the roof. Thirdly, the location of the guest house of Haemi Eupseong of the late Chosun Dynasty is judged to be the periphery area where the current restored guest house is located, which is where the teachers' building of Haemi elementary school was located. Fourthly, the prospect of the guest house of Haemi Eupseong is decided to be similar direction to the current restored guest house with the greatest possibility of having the same direction with the arrangement of teachers' building of Haemi Eupseong elementary school.

• Journal of architectural history
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• v.21 no.4
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• pp.37-46
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• 2012

This study examines the construction method of lime tomb of royal tombs in the Choseon Dynasty based on reference. This was primarily published as "The Five Manners and Courtesy of the Annals of Sejong" as examples, which were followed by the influence of Koryo's culture in the beginning foundation of Choseon, were organized in the time of Sejong; and later, in the time of Sungjong, "The National Five Manners and Courtes y" was published. Such old reference explains the stone materials and construction method of the royal tomb's pit yet there were not many studies regarding the pit of royal tomb in the Choseon Dynasty. And there exists no historical research or reference study in regard to the pit of royal tomb which is formed as a lime tomb. This is believed to be impossible to excavate the royal tomb since ancestral ritual formalities are still given by the descendants and because of our country's culture of giving ancestral ritual formalities which value formalities and filial duty. However, the current excavation of Guhui Tomb, which was the early burial site, was important since it gives an opportunity to look at the shape and structure of lime tombs in the Choseon Dynasty. Thus, this study, based on the excavation of Guhui Tomb, will look into the construction method of the pit of lime tomb and will examine the structure, shape, construction method, etc. of the lime tomb which was formed after the time of Sejo in a way with reference history. This is an important data to learn the construction method of limb tomb of royal tombs in the Choseon Dynasty and is believed to have a very important value as historical materials as to understanding the structure of the pit of royal tombs in the Choseon Dynasty which yet has not been excavated.

• Journal of Korean society of Dental Hygiene
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• v.19 no.5
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• pp.625-633
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• 2019

The aim of this study was to review the history of dental hygiene education in Korea on its $50^{th}$ anniversary in 2015. Internal resources and documents from the Korean Dental Hygienists' Association and other accessible resources were examined to verify the historical facts of dental hygiene education in Korea. From 1965 to 1967, the first class of four dental hygiene students graduated, and the legal basis for dental hygiene as a profession was established, which led to the start of the profession Registered Dental Hygienist in 1971. From 1977 to 1993, 13 higher educational institutions started dental hygiene programs. The Korean Dental Hygienists' Association (1977) and Korean Association of Dental Hygiene College Professors (1987) were established in this period. From 1994 to 2006, the duration of major-intensive course programs in dental hygiene was extended to three from the two years of 1994, and the first bachelor's degree program in dental hygiene started in 2002. In this period, studies on dental hygiene became significantly active owing to vigorous activities by academic societies. The master's degree program in dental hygiene was established in 2007. Academic dental hygiene journals, the Journal of Dental Hygiene Science, and Journal of Korean Academy of Dental Hygiene Education were promoted as the registered journals of the Korean Research Foundation. From 1965 to 2015, dental hygiene education in South Korea expanded both quantitatively and qualitatively and is now ready for further progress in the future.

• Journal of architectural history
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• v.14 no.1 s.41
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• pp.135-150
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• 2005

Historical study of Korean traditional houses have been carried, mainly, based on the geographical region of Korean peninsula. However, the case of primitive houses can not be researched according to the geographical and racial concept of modern nations. This study aims to examine the primitive houses of ethnic minorities of northeastern China, where the cultural and racial background have been deeply rooted in the history of Korea as well as Korean traditional houses. Through the field research and literary materials, the basic types of primitive houses of the five ethnic minorities could be identified. Among these types, those that have possible relationship with Korean houses, are cone shaped house, underground house, and elevated wooden house. Archeological evidences of underground houses were amply found in Korea already, but above ground evidences could not be found. However, It seems quite certain that the cone shaped houses and elevated wooden houses, too, existed in Korea as one of the earliest housing types, as can be examined in remaining examples in Korean peninsula. With no doubt, the primitive houses of Korea have strong connection with that of the ethnic minorities of northeastern China. This can be verified through the facts that the evidences of cone shaped houses, the similarities of the use of Inner space, the evidences of elevated wooden houses. Also, the combination of wooden floor and ondol, which is known to be one of the strongest characteristic of Korean traditional houses, could be originated from the combination of primitive summer house, the elevated wooden house, and the winter house, the underground house with ondol.

• Asian Pacific Journal of Cancer Prevention
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• v.15 no.17
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• pp.7479-7486
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• 2014

Background: Colorectal cancer (CRC) is one of the most common cancers worldwide. This study aimed to investigate the interaction between the presence of a polymorphism of the XRCC1 gene and known risk factors for colorectal cancer in Thailand. Materials and Methods: A hospital-based case-control study was conducted in Thailand. The participants were 230 histologically confirmed new cases and 230 controls matched by sex and age and recruited from the same hospital. Information about demographic characteristics, life style, and dietary habits was collected using structured interviews, and blood samples were taken which were used for the detection of a homozygous and heterozygous polymorphisms of XRCC1. Associations were assessed using multiple conditional logistic regression. Results: In the univariate analysis, factors found to be significantly associated with an increased risk for CRC were the presence of the XRCC1 AA homozygote (OR= 4.95; 95% CI: 1.99-12.3), a first degree family history of cancer (OR= 1.74; 95% CI: 1.18-2.58), and a high frequency of pork consumption (OR= 1.49; 95% CI: 1.00-2.21). Intakes of fish fruit and vegetables appeared to be protective factors, but the associations were not statistically significant. In the multivariate analysis only the XRCC1 AA homozygote polymorphism and a family history of cancer emerged as risk factors (OR= 4.96; 95% CI: 1.90- 12.95 and OR=1.80; 95% CI: 1.18-2.72, respectively). Conclusions: While the XRCC1 AA homozygote and a family history of cancer were found to be associated with an increased risk of CRC, none of the dietary intake variables were clearly identified as risk or protective factors. There is a need for further research to determine the reasons for this.

• Safety and Health at Work
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• v.6 no.2
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• pp.139-142
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• 2015

Background: Healthcare workers' practices regarding hepatitis B have an important effect on the control of this problem in workplaces. Methods: A questionnaire-based cross-sectional study was used to investigate the role of knowledge, cues to action, and risk perceptions as predictors of preventive behavioral intentions for hepatitis B among healthcare works in Broujen, Iran (n = 150). History of hepatitis B vaccination, hepatitis B surface antigen test, and demographic characteristics were investigated. The psychometric properties of the questionnaire were established. Results: Those who had a history of hepatitis B surface antigen test had a statistically significant higher level of risk perceptions ($30.89{\pm}4.08$ vs. $28.41{\pm}3.93$, p < 0.01) and preventive behavioral intentions ($5.05{\pm}1.43$ vs. $4.45{\pm}1.29$, p < 0.01). The mean score of cues to action was significantly correlated with age and work history (r = 0.20, p = 0.02 and r = 0.19, p = 0.02). Preventive behavioral intentions were significantly correlated with cues to action and risk perceptions but not with knowledge level. Cognitional factors were responsible for a 17% change in observed variance of preventive behavioral intentions, which was statistically significant. Conclusion: Risk perceptions were the most important determinant of preventive behavioral intentions for hepatitis B among health personnel; thus, emphasizing risk perceptions is recommended in educational programs aimed at increasing health personnel's practices regarding hepatitis B.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• v.26 no.6
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• pp.684-687
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• 2000

Mongolia is a huge, landlocked, middle-Asian country bordering Russia in the north, and China in the south. Mongolia was under socialism from 1921 to 1990, and its political system has started moving toward capitalistic democratism in 1990. The history of the Mongolian Oral & Maxillofacial Surgery can be divided into four periods; the incipient period($1956{\sim}1971$), the period of early development($1971{\sim}1981$), the period of active development($1981{\sim}1991$), and the period of reformation($1991{\sim}$). Mongolian Oral & Maxillofacial Surgery had been developed by the cooperation of Soviet Union and Eastern European countries before the 1990s, but the role of Korea, Japan, and western countries has been increasing from the 1990s. In Mongolia Oral & Maxillofacial Surgery is well recognized to the people and is considered as one of the specialized medical field. There are specialized departments of Oral & Maxillofacial Surgery in State Central Hospital, Child & Maternal Research and Clinical Center, and Oncology Center in Ulaanbaatar. Now, the basic knowledge and surgical technique of the Mongolian Oral & Maxillofacial Surgeons are satisfactory. But because of the difficult social and economic situation, there is a shortage of surgical instruments and materials, and acquirement of new knowledge is not easy. In 1998 the Mongolian Association of Oral & Maxillofacial Surgeons was established and its members want to have international relationship to keep up with the new medical information. Mongolia and Korea have ethnic, linguistic and cultural similarity, so the interchange and cooperation between Mongolian and Korean Oral & Maxillofacial Surgeons are recommended to make a beautiful one-world.