• Publications of The Korean Astronomical Society
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• v.30 no.1
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• pp.1-9
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• 2015

The National Foundation Day of Korea (개천절, 開天節) is currently celebrated on October 3 in Gregorian calendar. We review the history of dating the National Foundation Day of Korea and make a suggestion that it be celebrated on October 3 in the lunar calendar. We present numerous historical records on heaven-worship rites supporting the date October 3 in the lunar calendar. It is pointed out that October 3 in the solar calendar has been adopted in 1949 by the National Assembly with the thought that the lunar calendar is inferior and behind the times. The thought originates from misunderstanding on the value of the lunar calendar and from the ignorance of importance of history and tradition. Since there are now many national holidays that follow the lunar calendar, the logic of the National Assembly in 1949 also makes no sense. We emphasize that the lunar calendar should be followed for the National Foundation Day of Korea for its historical and symbolic characteristics restoration. We also investigate the year of the foundation of the first country of Korea, Dangun Joseon. It is found that even though the majority of the literature before late 15th century recorded the beginning year of Dangun Joseon dynasty to be equal to that of Liao Dynasty (堯), it was accidentally changed to the 25th year of Liao Dynasty in 1484 through a misinterpretation of the previous records. We claim that the beginning year of Dangun Joseon should be set to that of Liao Dynasty as recorded in the original literature in the earlier days. According to the two main opinions accepted by Korea, the beginning year of Liao Dynasty was 2357 B.C. or 2333 B.C., which correspond to the year of Gap-Jin (the 41st year of the sexagenary cycle) or Mu-Jin (the 4th year of the sexagenary cycle), respectively.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.43 no.1
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• pp.46-53
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• 2010

Spawning behavior and early life history of the tuman river sculpin, Cottus hangiongensis were studied in the laboratory and in the field at Wangpi Stream, Gyeongsangbuk-do, Korea, from January to December, 2007. The spawning ground was in the lower Wangpi Stream, which is a shallow region about 40cm or less in depth. During the spawning period, from March to April, mature males made nest cavities under stone 10 which they led a gravid female. The male and female then turned upside down, and spawning and fertilization occurred onto the ceiling of the nest cavity. After spawning, the male chased the female from the nest and mated with several other females. Fertilized eggs were spherical in shape, demersal, adhesive, transparent and yellow in color, measuring 1.86 mm (1.79~1.93 mm) in diameter. A mean of 17(12~22) various-sized oil globules were counted in the yolk. Granular materials formed a mass in the yolk. Fertilized eggs hatched at 256 hrs, 10 minutes after the morula stage under water temperature of $15.0{\sim}18.0^{\circ}C$. Newly hatched larvae 9.34 mm (9.02~9.69 mm. n=10) in total length (TL) had a large yolk At 14 days after hatching, larvae 11.40 mm (11.07~11.72 mm, n=10) in TL transformed to the postlarval stage. At 41 days after hatching, postlarvae of 18.42 mm (17.31~18.62 mm, n=10) in TL had reached the juvenile stage. The result of this study indicate that Cottus hangiongensis has the spawning ground in the lower stream and the amphidromous life history which is the different from that of Cottus poecilopus.

• Korean Chemical Engineering Research
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• v.48 no.1
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• pp.93-97
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• 2010

In this study, we have measured the thermo-physical properties of pure organic phase change materials (PCMs) and their mixtures which have the melting points from 0 to $15^{\circ}C$ by using a modified T-history method. These organic PCMs can be used as coolant materials for packaging and shipping of vaccines. Through measuring the thermophysical properties of pure paraffins, we were able to know that we could improve the reliability of measurement if we considered the melting point of each material and subsequently decided an optimum coolant temperature for each system. The modified T-history method showed a potential usefulness for reliably measuring thermo-physical properties of organic mixtures with avoiding possible inaccuracy of measurement due to using a small amount of sample at DSC measurement.

• 한국문화재보존과학회:학술대회논문집
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• 2006.11a
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• pp.23-28
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• 2006

• 한국문화재보존과학회:학술대회논문집
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• 2007.10a
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• pp.37-38
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• 2007

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• v.49 no.3
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• pp.142-147
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• 2023

Objectives: As medical history before surgery is often based on patient reporting, there is the possibility that patients intentionally hide underlying diseases or that dentists cannot recognize abnormal health states. Therefore, more professional and reliable treatment processes are needed under the Korean dental specialist system. The purpose of this study was to elucidate the necessity of a preoperative blood testing routine prior to office-based surgery under local anesthesia. Patients and Methods: Preoperative blood lab data for 5,022 patients from January 2018 to December 2019 were assembled. Study participants were those who underwent extraction or implant surgery under local anesthesia at Seoul National University Dental Hospital. Preoperative blood tests included complete blood count (CBC), blood chemistry, serum electrolyte, serology, and blood coagulation data. Values outside of the normal range were considered an "abnormality," and the percentage of abnormalities among the total number of patients was calculated. Patients were divided into two groups based on the presence of underlying disease. The rates of abnormalities in the blood tests were compared between groups. Chi-square tests were performed to compare data from the two groups, and P<0.05 was considered statistically significant. Results: The percentages of males and females in the study were 48.0% and 52.0%, respectively. Of all patients, 17.0% (Group B) reported known systemic disease, while 83.0% (Group A) reported no specific medical history. There were significant differences between Groups A and B in CBC, coagulation panel, electrolytes, and chemistry panel (P<0.05). In Group A, the results of blood tests that required a change in procedure were identified even though the proportion was very small. Conclusion: Preoperative blood tests for office-based surgery can detect underlying medical conditions that are difficult to identify from patient history alone and can prevent unexpected sequelae. In addition, such tests can result in a more professional treatment process and build patient confidence in the dentist.

• Korean Institute of Interior Design Journal
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• v.22 no.5
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• pp.22-32
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• 2013

Today, the museum historical material and mental, physical culture and heritage to preserve the collection and exhibition organization rather than to recognize that culture acts as a community to respond to the subject of the attitude and the ability jeokgeukhwa also due to the trend of the times due to changes in lifestyle education and research, and public participation in culture by expanding the role of dissemination activities are becoming. Museum exhibit these changes as part of a combination of various technologies in the coexistence of digital and analog display direction proactive and aggressive behavior, such as visitors expect to have an evaluation of the public and communicate the expectations of the plan in the exhibition space, the larger the effect can feel. This effective display for visitors to watch the way for a systematic approach to provide direction to the urgent reality. Museum visitors experienced officials to improve the quality of research in a variety of ways spectators began to try and move the action was to put the attention on the characteristics. Visitors to visit the Museum of History and ages, categorized by the type of display any difference in the behavior of the visitor experience and attributes based on what is being investigated for the History Museum's exhibition of any exhibit to visitors that experience and is to an analysis.

• The Journal of Korean Medical History
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• v.22 no.1
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• pp.15-24
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• 2009

The objective of this article is to analysis of Acupuncture & Moxibustion Fix-a-day Method (AMFDM;鍼灸擇日) shown in the Seunjeongwon-Ilgi(承政院日記). Through such inquisition, The practical application of AMFDM could be found. The authors used web database of Seunjeongwon-Ilgi(承政院日記) serviced by National Institution of Korea History. We searched the database twice. First, We check up the database using key words - '忌日', '吉日', '拘忌', '鍼', '針' and '灸'. Search words is "(忌日|吉 日|拘忌)&(鍼|針|灸)". Second, We check up the database using other key words - '瘟㾮', '爲吉', '爲受鍼吉'. 1. AMFDM was used whenever Royal Family was cared. Futhermore, Its application method was as same as medical documents said. 2. AMFDM in the Seunjeongwon-Ilgi consists of Taboo-day(忌日) and Favor-day(吉日). Taboo-day is classified into following 5 type. Weather, Moon phases, The 24 solar terms(節氣), Spirit-location(人神), KunJie-12-deity(建除十二神) and OnHuang-day(瘟㾮日). 3. Sometime contradiction was occurred when AMFDM was used. So AMFDM had the priority order. According to these's order, doctor picked up a date. 4. Doctor used AMFDM to control Interval of treatment. They thought that acupuncture treatment exhaust one's Qi(氣). Using AMFDM, they could give recovery period to patient.

• Atmosphere
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• v.33 no.2
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• pp.155-171
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• 2023

This paper aims to examine from various perspectives how domestic research studies and projects related to climate change have been conducted to mark the 60th anniversary of the Korean Meteorological Society (KMS). The 『50-year History of the Korean Meteorological Society』, published more than a decade ago, has never dealt with the history of development of individual fields of meteorology such as climate change. Therefore, it is of significance to look at the history of research activities and studies achieved by KMS members in the area of climate change over the past 60 years. The research on climate change in KMS is classified by era from the beginning to the latest and the contents are examined by major research projects at that time. During the past 60 years, climatological research in KMS has been mainly focused on general climate, synoptic climate, and applied climate (urban climate) until the 2000s. However, since the 1990s, climate change has become an important area for climate research. The 2000s are the beginning era of climate change research, since the major projects and researches for climate change has begun in the period. The 2010s can be a time when climate change prediction and monitoring are expanded and refined to meet the rapidly increasing demands for climate information from a wide range of areas. We concluded that the development of the research capabilities of the society over the past 60 years, in particular in the past two decades, in the field of climate change research is remarkable.

• Journal of Korean Society of Archives and Records Management
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• v.22 no.2
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• pp.95-116
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• 2022

This study selected four institutions, namely the National Archives of Korea, the National Library of Korea, the National Institute of Korean History, and the Institute for Military History, that have collected the foreign records about Korea, providing web services for users. A total of 163,874 records were collected from these institutions to analyze the topics of the records, which resulted in a proposed topic map with 7 facets as top levels. This study suggests an integrated and visualized tool using a topic map to improve the searching service of foreign records about Korea from Korean institutions, especially the US records related to Korea.