• 디지털콘텐츠학회 논문지
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• 제6권3호
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• pp.149-155
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• 2005

요즈음 인터넷 사용자들의 폭발적인 증가와 함께 많은 콘텐츠가 생겨났고 그중 공간의 제약이 없고 교육의 기회가 확대되는 장점으로 인해 사이버강의, 사이버대학이 생기는 등 온라인 교육이 활성화 되고 있는 추세이다. 그러나 온라인 교육은 오프라인 교육과 달리 수강자가 출석이나 시험 일정 둥 자신이 수업에 관한 정보를 계속적으로 관리하지 않으면 출석미달, 과제 및 시험에 관한 정보부재로 인한 어려움이 생길 수 있다. 본 연구에서는 항상 지참하고 있는 휴대폰을 이용하여 사이버강의 둥의 수업 정보를 언제 어디서나 관리하여 온라인교육의 학습능률을 향상시킬 수 있는 모바일 교육시스템을 제안한다.

• 동아시아식생활학회지
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• 제18권1호
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• pp.158-164
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• 2008

This study was performed to present new insights into the distinct aspects of Jehotang. Its history, significance, and effects were examined by evaluating the pertinent literature. In which the idea that Korean foods were original sources of medicine was well expressed. This study was also conducted with the anticipation that it may be useful in developing new foods and beverages based on modern science. References to the Jehotang were found in nine Korean medicine books, seven general books, and in dynastic records such as Bibyeonsa deungnok, Joseonwangjosilrok, Seungjeongwon Ilgi, etc; thus, it was likely a food since the early Korean age. Furthermore, it was discovered that in the Chosun era. Jehotang was not only drunk as a soft drink at the Royal Court in the summer, but was also used as a royal gifts to Cabinet members at the Tano festival on the fifth day of the fifth month of the lunar calendar.

• 천문학논총
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• 제26권1호
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• pp.1-24
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• 2011

Korea Astronomy and Space Science Institute (KASI) has constructed online database of the Korean Astronomical Almanac as a part of the 'Knowledge and Information Business Project 2009' supported by the Ministry of Knowledge Economy. Throughout this project, KASI provides both digitized images and extracted text from the almanac covering approximately 240 years. The primary purpose of this paper is to serve as a reference for users of the almanac database. Hence, we introduce the calendar history and kinds of the astronomical almanac used in Korea, and explain the contents of the almanacs according to its appearance time. We also briefly mention the steps employed in constructing the database system and Web site. Since ancient times, astronomical almanacs have been an essential part of daily life. We, therefore, believe that the astronomical almanac database constructed by KASI will prove its usefulness in various fields, and particularly in the study of historical astronomy.

• 천문학회지
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• 제48권6호
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• pp.325-331
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• 2015

We study an association between the duration of solar activity and characteristics of the latitude distribution of sunspots by means of center-of-latitude (COL) of sunspots observed during the period from 1878 to 2008 spanning solar cycles 12 to 23. We first calculate COL by taking the area-weighted mean latitude of sunspots for each calendar month to determine the latitudinal distribution of COL of sunspots appearing in the long and short cycles separately. The data set for the long solar cycles consists of the solar cycles 12, 13, 14, 20, and 23. The short solar cycles include the solar cycles 15, 16, 17, 18, 19, 21, and 22. We then fit a double Gaussian function to compare properties of the latitudinal distribution resulting from the two data sets. Our main findings are as follows: (1) The main component of the double Gaussian function does not show any significant change in the central position and in the full-width-at-half-maximum (FWHM), except in the amplitude. They are all centered at ~ 11° with FWHM of ~ 5°. (2) The secondary component of the double Gaussian function at higher latitudes seems to differ in that even though their width remains fixed at ~ 4°, their central position peaks at ~ 22.1° for the short cycles and at ~ 20.7° for the long cycles with quite small errors. (3) No significant correlation could be established between the duration of an individual cycle and the parameters of the double Gaussian. Finally, we conclude by briefly discussing the implications of these findings on the issue of the cycle 4 concerning a lost cycle.

• KIEAE Journal
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• 제3권3호
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• pp.67-74
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• 2003

The repair and maintenance planning is the principal transaction to prevent from the degradation of apartment buildings to prolong their lives. Various building components as part of living area should be maintained properly and timely before critical defects are realized, then the building life might be extended until the limit of its usability. In other words, various building components such as utilities, finishes and structural members are needed to be repaired and replaced in different time interval after completion. To do this systematically, a maintenance management system for Long-Range Planning (LRP) needs developing. The LRP should be figured out based on the forecast of repairing and replacing cycle of building components according to work trades. And the precise forecast of repairing and replacing time of the components helps to enhance the usability of the developed system. The purpose of this paper is to suggest a system with which apartment building managers carry out the tasks of periodical check, diagnosis and replacement of building components based on the maintenance calendar. By using the system, they can easily forecast repairing and replacing time of the components with the consideration of life cycle of building materials and build the LRP.

• 동아시아식생활학회지
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• 제11권1호
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• pp.60-70
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• 2001

This study was conducted to investigate the actual state of utilization of Korean traditional foods by Korean Americans residing in L.A. area and to provide come policies, to improve their attitudes for Korean traditional foods. The proper period preparing traditional foods was the occasion of family events(47.0% )and Korean festivals(40.8%). Festival foods were prepared in Sulnal( =New Year's Day), Chusok( =the Korean Thanksgiving Day), Daeborum( =the 15th of January by the lunar calendar), Dongji( =the winter solstice) and Tano( =the 5th day of the 5th by lunar month), respectively. Sixty five percent of all the respondents expressed their wish to hand down the cooking methods of traditional foods. However, only28.6% of the respondents at their twenties replied positively on this matter. To maintain and develop traditional foods abroad, it is necessary that older generations sometimes offer opportunities to meet with them to the coming korean generations to taste traditional foods and that Korean food companies establish special selling agencies abroad and export standardized traditional foods. And furthermore, if tourism corporations and cooking schools hold a food exhibition and or a food-tasting party, occasionally, in conjunction with the embassies and legations abroad, the utilization of traditional foods will increase.

• 천문학회보
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• 제37권2호
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• pp.102.1-102.1
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• 2012

In this paper, we analyzed Korean historical records of the periodic comet Halley in three periods (Three Kingdoms, the Goryeo dynasty, and the Joseon dynasty) using various sources such as Samguksagi (History of the Three Kingdoms), Goryeosa (History of the Goryeo Dynasty), and Joseonwangjosillok (Annals of the Joseon Dynasty). To determine the apparition time of the comet at each return, we referred to the works of Kronk. For the Three Kingdoms period, we could not find any record relevant to Halley's comet from Samguksagi. Instead, we examined the suggestion that the phenomenon two Suns appearing on April 1, 760 (in a luni-solar calendar), which is recorded in Samgukyusa (Renaissance of the Three Kingdoms), indicates an appearance of comet Halley during the daytime. In contrast, we found that all the returns of Halley's comet during the Goryeo dynasty are recorded, although some accounts are questioned. In addition, we found that the appearance of Halley's comet in 1145 is also mentioned in a spirit-path stele made in 1178. For the Joseon dynasty period, we found that all the returns of the comet are recorded, as with the Goryeo dynasty, except for the return of 1910, in which the former dynasty fell. In conclusion, we think that this study will be helpful for understanding Korean historical accounts of Halley's comet.

• International Journal of Contents
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• 제16권1호
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• pp.75-86
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• 2020

As the elderly population is becoming an aging society, the elderly are experiencing many problems. Social security costs for the elderly are increasing and the un-linked social phenomenon is emerging. Thus, the social infrastructure and welfare system established in the past economic growth period are in danger of not functioning properly. People socially isolated or with chronic diseases among the elderly are exposed to various accidents. Thus, an active healthcare management service is imperative. Additionally, in the event of a dangerous situation, the system must have ways to notify guardians (family or medical personnel) regarding appropriate action. Thus, in this paper, we propose the smartphone-based healthcare and emergency response service platform. The proposed service platform aggregates movement of relevant data in real-time using a smartphone. Based on aggregated data, it will always recognize the user's movements and current state using the human motion recognition mechanism. Thus, the proposed service platform provides real-time status monitoring, activity reports, a health calendar, location-based hospital information, emergency situation detection, and cloud messaging server-based efficient notification to several subscribers such as family, guardians, and medical personnel. Through this service, users or guardians can augment the level of care for the elderly through the reports. Also, if an emergency situation is detected, the system immediately informs guardians so as to minimize the risk through immediate response.

• 천문학논총
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• 제33권3호
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• pp.31-44
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• 2018

Song, I-Yeong (1619 ~ ?) was an active astronomer in the Joseon dynasty at the era of adopting the Shixian-li, Chinese calendar in Qing dynasty. His astronomical contribution was recorded in Annals of the Joseon Dynasty, Diary of the Royal Secretariat, Comparative Review of Records and Documents-Its Revision and Enlargement, and Treatise on the Bureau of Astronomy. In addition the details on his life and works were found at the genealogies of the Song Family from Yeonan and the Kim Family from Seonsan. His major astronomical activities can be summarized in three items. First, as a specialist astronomer, he has attempted to make a systematic observation of two comets. Second, he designed and fabricated the Jamyeong-jong, the weight-powered armillary clock, which became a typical model of the astronomical clock in the Joseon dynasty. Last, he served as a royal astronomical professor, greatly contributing on implementing the Shixian-li. Song has concentrated on performing astronomical duties for his royal official service time. Song is regarded as an important astronomer who made it possible to enforce the Shixian-li until the late Joseon dynasty.

• Journal of Medicine and Life Science
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• 제16권2호
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• pp.39-42
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• 2019

While the notified crude incidence rates(per 100,000 persons, CIR) of new tuberculosis between 2016 and 2017 decreased in nationwide and 16 provinces, except Jeju Province, Korea. The aim of this study was to compare CIRs of Jeju Province and nationwide by calendar years and age groups in order to interpret the increasing trend of CIR in Jeju Province. The data source was the Integrated Diseases and Health Control System of the Korea Centers for Disease Control and Prevention. The selection criteria were the notified new cases as tuberculosis, who had the address as Jeju Province at diagnosis, between 2011 and 2018. The 95% confidence interval of CIR was estimated based on Poisson distribution. There was not statistically significant difference of CIRs between Nationwide and Jeju Province of 2011 and 2018, except 2016. Especially the CIR of group aged over 65 years in Jeju Province, 2016 was significantly lower compared to Nationwide CIR. But, the CIR of group aged 30~50 between 2017 and 2018 showed significantly higher compared to Nationwide CIR. Based on the results, the fact of increasing CIR from 2016 to 2017 in Jeju Province might be interpreted as an introduction of new tuberculosis screening project rather than real increased CIRs.