• Industry Promotion Research
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• v.6 no.1
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• pp.23-31
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• 2021

The Calendar(曆法) has been a very important concern in every dynasty of history.『Hyupgiltongui』 written in the Joseon Dynasty included many contents related to the Calendar. In particular, the ancient rule of the Calendar(曆律) shown in the text of 『Hyupgiltongui』 Bonwon chapter one is meaningful in the process of creating the necessary Calendar for selection and reading fortune. Accordingly, we tried to analyze the rule of the Calendar(曆律) that is the fundamental principle of the Calandar(曆法) and the almanac which can be used in real life, based on comparative analysis of 『Hyupgibyeonbangseo』, 『Sanggiltongseo』 and 『Cheongidaeyo』, which are the basis of 『Hyupgiltongui』. Saju Myung-ri is the scheme of time change by the combination of Ganji (Celestial Stems). Therefore, the core of the calendar system is to make four pillars by the year, month, day, and time. For doing this, 『Hyupgiltongui』 provides basic principles and materials for making four pillars using constellations like 28 Fixed Stars, as well as does simple composition principle for telling fortune such as Ten Celestial Stems, Twelve Zodiac Signs, the order of four seasons(四序), Yukjin(六辰) and Sexagenary Cycle (甲曆). However, despite the limitations of the results produced by the rule of the Calendar(曆律), we came to the conclusion that if reading fortune in Saju(四柱簡明) is to find good one(吉) in terms of understanding it as the rule of predicting future(術法) not science, its usefulness cannot be ignored.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.49 no.3
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• pp.243-249
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• 2021

The star tracker detects microscopic star light in space and compares it with a stored list of stars to calculate the satellite's position in the inertial coordinate system. If other light, such as the sun or the earth, enters the optical head, the star cannot be recognized and the star tracker cannot be operated. In particular, strong light such as the sun affects not only operation but also the performance of the star tracker. The sun exclusion angle of the star tracker is one of the important factors determining the performance of the star tracker. This paper performs the verification of the star tracker's sun exclusion angle. In order to verify the sun exclusion angle, we predict the sun exclusion time of the star tracker and compare it to the actual sun exclusion time of the GEO-KOMPSAT-2A star tracker. In addition, the performance of the star tracker is analyzed for normal operations against the sun exclusion in the optical head. It shows that the actual sun exclusion is maintained under the range of 26 degrees, the performance requirement of the star tracker, and the star tracker operates normally in spite of the sun exclusion.

• Journal of The Korean Astronomical Society
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• v.54 no.3
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• pp.89-102
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• 2021

Even in an era where 8-meter class telescopes are common, small telescopes are considered very valuable research facilities since they are available for rapid follow-up or long term monitoring observations. To maximize the usefulness of small telescopes in Korea, we established the SomangNet, a network of 0.4-1.0 m class optical telescopes operated by Korean institutions, in 2020. Here, we give an overview of the project, describing the current participating telescopes, its scientific scope and operation mode, and the prospects for future activities. SomangNet currently includes 10 telescopes that are located in Australia, USA, and Chile as well as in Korea. The operation of many of these telescopes currently relies on operators, and we plan to upgrade them for remote or robotic operation. The latest SomangNet science projects include monitoring and follow-up observational studies of galaxies, supernovae, active galactic nuclei, symbiotic stars, solar system objects, neutrino/gravitational-wave sources, and exoplanets.

• The Korean Journal of Food & Health Convergence
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• v.5 no.1
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• pp.1-11
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• 2019

Smoking has become one of the public health harzard affecting the world. In the UK, smoking is responsible for around one in five deaths. The illnesses caused by smoking extend beyond the well-reported links with cancer, heart disease and respiratory illnesses. Hence the research to determine the awareness of the predisposing factor to smoking among adults in sokoto metropolis. A cross-sectional form of descriptive survey research design was used for this study. This is because descriptive studies are used when the characteristics of a population are either unknown or partially known (Hennekens & Buring, 2007), and it was used by Ganley and Rosario (2013) in a related research this justified the use of similar design in a study of similar nature.Two hundred and seventy returned questionnaire was collected, analyzed using descriptive statistic of frequency count, normative percentage and grand mean; as well as inferential statistics of chi-square (${\chi}^2$). The level of significant was fixed at 0.05. Appropriate degrees of freedom were worked out. There was statistical significant influence or relationship with marital status on the predisposing factors of smoking chi-square of 19716.516 greater than the critical value 43.77297at df 30 p<0.05. There were statistical significance chi-square =27468.348 which is greater than the critical value 43.77297 at df= 30. These show that there is a relationship on gender awareness of predisposing factors to smoking rejecting the null hypotheses. The respondents across different lever/year higher institution shows that the awareness of predisposing factors of smoking there were a statistical significance difference chi-square =7168.429 (df=88) greater than critical value 102.342 rejecting the null hypotheses. There is consistent evidence that links exposure to depictions of smoking in movies and initiation of smoking in young people. Over the years television shows and films have effectively built up associations between smoking and glamour, sex and risk-taking. Social learning theory describes how we learn by example from others. We are strongly influenced by our parents, and other people we look up to, such as peers, actors and pop stars. This can lead us to emulate their behaviour and try smoking.

• Journal of Digital Convergence
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• v.20 no.4
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• pp.725-735
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• 2022

This study analyzed how the literary works embodying nurses accommodate various discourses about nurses and reproduce them in literature. The subject of analysis is a Korean modern novel featuring a nurse, and 29 works were selected from 1927 to 2016. The analysis method is the content analysis of the novel among the qualitative research methods. The unit of analysis adopts a narrative or dialogue that deals with the image of a nurse in a novel as a unit of analysis, The image determining factors of previous studies were integrated and categorized into 4 types and considered. As a result of analyzing the image of a nurse in the novel, First, traditional image types include Lee Kwang-soo 『Love』, Kim Eui-jung 『Doctor Han』, Jo Jung-rae 『Han River』, Gong Ji-young's 「Field of Stars」, Baek Min-seok 「Poor Little Hans」 Second, social image types include Kang Kyung-ae 「Dark」, Kim Kyung-wook 「Heaven's Gate」, Choi Jeong-hee 「Cheonmaek」 Third, professional image types include Lee Cheong-jun 「Mr. Jo Man-deuk」, 「Discharge」, Choi In-hoon 『The Square』, Kim Yeon-soo 「The Night in the Tunnel Where I Listened to Jusaeng Tudipini」, Jeong Se-lang 『Public health teacher Ahn Eun-young』and Fourth, personal image types include Choi In-ho 「Apprentice Patient」, Kim Jeong-han 「The Third Ward」, Eun Hee-kyung 『Minor League』, Hoon Kim 「Hwajang」, Ha Seong-ran 「The Joy of Eating」, Kim Ji-yeon 「Hippocrates Love Song」, Park Kyung-ri 「Era of Distrust」, Jeong Mi-kyung 「The Lady of Arsenal」 typed as. Through the image of the nurse in the novel, the implications of the novel for human care were discussed.

• Journal of the Korean Society of Earth Science Education
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• v.14 no.3
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• pp.225-235
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• 2021

The purpose of this study is to obtain implications for the improvement direction of astronomical education methods and development of educational materials or software. In connection with the 5th grade 1st semester elementary science 'Solar System and Stars' unit, elementary pre-service teachers were given a reorganization task to compare the relative distances from the sun to the planets, and then this was analyzed. Pre-service teachers are 11 male and 19 female students in the second year of the music education department at the elementary school teacher training university in B city. The implications of the study results are as follows. First, the 'distance comparison activity using a roll of tissue paper' is suitable for simply comparing the distances from the sun to the planet, but it has limitations in allowing students to experience the vastness of the solar system or inducing student participation-centered classes. Second, it is necessary to develop software materials for elementary school students that can simultaneously reflect the size of the planet and the distance to the planet that can be applied indoors, and also experience the vastness of the solar system, as well as a wide learning space. Third, textbook materials for students have an important influence on the class design of pre-service teachers.

• The Journal of the Korea Contents Association
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• v.22 no.10
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• pp.291-308
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• 2022

The purpose of this study is to suggest an effective marketing method for product advertising. With regards to this, 148 copies of survey data were collected from consumers, and the hypothesis of this study was verified using SPSS 25.0. The results revealed that (1) Human Brand attractiveness had a positive effect on Human Brand attachment among the products of low involvement. (2) The uniqueness and the intimacy of Human Brand had a positive effect on Human Brand attachment among the products of high involvement. Through this study, the effect of reliability, expertise, attractiveness, uniqueness, and intimacy among human brand characteristics on human brand attachment, human brand attitude, and product purchase intention was confirmed, and it was also possible to confirm the difference in influence on human brand characteristics and purchase intention according to the product characteristics involved. This study has expanded the research scope of Human Brand, which has been studied mainly by entertainers and entrepreneurs, to sports stars and through empirical analysis, it has tried to identify influencing factors to improve purchasing intent based on high and low-contention characteristics of advertising products.

• Journal of Korea Entertainment Industry Association
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• v.14 no.8
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• pp.141-152
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• 2020

This thesis is a study on the creation of characters of "personality actors and character actors" among the concepts of "star persona" of S. Prince. This study selected 7 representative films of Jung Woo-sung, a representative personality actor in the Korean film industry, and analyzed how 'Jung Woo-sung-character' is embodied in the film as a character component suggested by R. Dyer. In the traditional sense, the actor's acting has been highly valued for transformation and impersonation in character creation, but discussing the method of creating a character focusing only on the actor's acting in a movie acting implemented in combination with advanced technology I don't think it's suitable for movie acting research. Theorists such as R.Dyer and Edgar Morin, who studied film actors and stars, also emphasize that 'movie actors are different from theater actors' (by the film medium). Therefore, in this thesis, a detailed analysis of the acting of a personality actor was avoided. As Morin pointed out that the character in the movie can be implemented through the actor's image and type, not playing the type of role. I tried to propose the significance of this character creation method of the personality actor by analyzing actor Jung Woo-sung and his character.

• Korean Journal of Optics and Photonics
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• v.35 no.5
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• pp.199-209
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• 2024

Predicting the performance of adaptive optics systems is a crucial step in their design and analysis. First-order prediction methods, based primarily on several assumptions and scaling laws, are commonly used. These methods must account for various parameters and error sources, such as the intensity and profile of atmospheric turbulence, fitting errors based on the resolution of the wavefront sensor and deformable mirror, wavefront-sensor noise propagated through the wavefront-reconstruction algorithm, servo lag due to the finite bandwidth of the control loop, and anisoplanatism caused by the arrangement of natural and laser guide stars. However, since first-order performance-prediction methods based on certain assumptions can sometimes yield results that deviate from real-world performance, evaluation through computational simulations and closed-loop tests on a testbed is necessary. Additionally, an atmospheric simulator is required for closed-loop testing, which must adequately simulate the spatial and temporal characteristics of atmospheric disturbances. This paper aims to present an overview of the theory of atmospheric disturbance simulators, as well as their implementation in computational simulation and hardware.

• Journal of Astronomy and Space Sciences
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• v.25 no.2
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• pp.101-112
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• 2008

Systematic CCD observations of times of minimum lights for eclipsing binaries has been carried out from 2002 to 2007 at Campus Station of Chungbuk National University Observatory which is located in Cheongju city, Korea. As a by-product of our observations, photometric data for stars in CCD images taken from 2005 to 2007 were used to determine 1st order atmospheric extinction coefficient (hereafter AEC) and seasonal and yearly variations of the AECs were studied. Total nights used for determination of AECs were 57 days in 2005, 51 days in 2006, and 63 days in 2007. As a result the annual mean value of the AECs per air mass is calculated as $0.^m34{\pm}0.^m18$ for 2005, $0.^m38{\pm}0.^m19$ for 2006, and $0.^m45{\pm}0.^m20$ for 2007. These values show that the AECs and their standard deviations are two and four times, respectively, larger than those of normal observatories which are not located near large cities. Annual comparison between concentration of atmospheric fine dust and coefficient of atmospheric extinction show strong correlation between two quantities of which time variations show similar patterns. The AECs for the east sky show larger than those for the west sky. It can be easily understood by the reasonable possibility that air pollutants remain more in the east sky than in the west because the east area of Cheongju city has been more developed than the west one. In conclusion the atmospheric extinction of the night sky of Cheongju city has an annual trend of increase of $0.^m06\;airrnass^{-1}\; year^{-1}$ implying that it may take only about 13 years for Cheongju city to have 2 times brighter night sky than the present one. Our study highlights that variations of AEC can be used as an important indicator of air pollution to monitor night skies.