• Journal of Korean Home Economics Education Association
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• v.34 no.4
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• pp.19-41
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• 2022

This study aims to confirm the effect of the 'Meal and Cooking for Single-Person Households' education program on improving the dietary management competency of high school students. In order to achieve this research purpose, 'Meal and Cooking for Single-Person Households' education program was developed, implemented, and evaluated based on the ADDIE instructional design model. The results of this study are as follows. First, an analysis was conducted on literature and prior research related to the dietary life of single-person households and dietary education programs of the home economics subject. Based on this, the theoretical background for the 'Meal and Cooking for Single-Person Households' education program was established. Then, teaching-learning process plan and student workbooks for a total of 16 unit classes were developed. The expert validity of the program was verified by 6 experts who are current high school home economics teachers and have experience in conducting research related to dietary education programs. As a result, the average of all items was 4.89 (out of 5 points) and the CVI was 0.98, securing very excellent content validity. Second, the researcher directly implemented 'Meal and Cooking for Single-Person Households' education program for 100 students in Y high school located in Sejong city. Considering the school's situation, the 16th session of teaching-learning process plan was shortened to 6th sessions while all the core topics. A survey was conducted on students who participated in the program and the pre- and post- results were analyzed. As a result of the survey analysis, the 'Meal and Cooking for Single-Person Households' education program had a positive effect on improving the dietary management competency of high school students. This study is meaningful in that it has implications for the development of a new subject in home economics in preparation for the high school credit system and improving dietary management competency in accordance with social changes in the era of single-person households, and the 'Meal and Cooking for Single-Person Households' education program developed in this study can be used as a mini-subject in the 2022 revised curriculum.

• Journal of The Korean Association For Science Education
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• v.35 no.2
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• pp.289-301
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• 2015

This study noted that elementary school students were unable to accurately comprehend the principles of moon phase changes and that teachers themselves lacked a full understanding of it as well. Therefore, this study classifies conception types through 161 5th grade respondents and suggests how to change students' conception types through the use of reconstructed teaching and learning materials (that have been developed in existing studies). It verified the changes in the learning achievement of 129 5th grade respondents and analyzed how to think about reconstructed teaching and learning materials through four teacher respondents and four 5th grade respondents from the same study. The results of this study are as follows: First, the conception types on moon phase changes were classified into C and W types. W types consisted of W1, W2, W3, W4, and W5 types. Students had difficulty in understanding the principles of a waxing crescent moon and first quarter phase changes. Second, the group taking classes, which implemented reconstructed teaching and learning materials, showed greater improvement in learning achievement posttest and long-term tests compared to those who have not. Finally, teachers and students reacted positively to the reconstructed teaching and learning materials as shown in exit survey results. In conclusion, it is suggested that teachers are better off utilizing reconstructed teaching and learning materials so that elementary school students may fully understand the principles of moon phase changes rather than just memorizing the results.

• Journal of the korean academy of Pediatric Dentistry
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• v.49 no.3
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• pp.321-328
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• 2022

The aim of this in-vitro study is to evaluate the effect of potassium iodide (KI) on erythrosine-mediated photodynamic therapy (PDT) against Streptococcus mutans biofilms. S. mutans ATCC 25175 was cultured to form a biofilm on a hydroxyapatite disk. After diluting erythrosine to 20 μM and KI to 10, 50, and 100 mM, respectively, PDT was performed. The number of surviving bacteria was calculated as colony forming units (CFU)/mL and the statistical significance of the difference between groups was confirmed by Bonferroni post-hoc analysis. Cell viability was visually evaluated using confocal laser scanning microscopy (CLSM). As a result of the experiment, a significant decrease (p < 0.05) in CFU was observed in the experimental groups in which PDT was performed after applying KI regardless of the concentration of KI. In addition, a significant reduction (p < 0.05) in CFU was observed in the experimental group to which 100 mM KI was applied compared to 10 mM KI. The same results were confirmed when observing CLSM. KI significantly improved the efficacy of erythrosine-mediated PDT on S. mutans biofilms at all concentrations. This may compensate for the low sensitivity of PDT to biofilm-state bacteria strains, but it is necessary to establish an optimal clinical protocol through further research.

• Korean Journal of Heritage: History & Science
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• v.37
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• pp.445-469
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• 2004

The Avatamsaka Sutra copied in ink on the white paper of Shilla Period is the oldest manuscript in korea. This Avatamsaka Sutra is volume 1-10 and 44-50 of the 80 volume's transcription. According to the postscript, written with 528 letters at the end of the volume 10 and 50, this sutra is made during A.D. 754-755, for six months by the order Master Yon-gi(綠起 法師) who founded Hwaumsa Temple(華嚴寺.) It explains the procedure of the ritual and production method of the sutra-copying, and also shows the 19 participants with their name, address, official title, and etc. When the sutra was founded, volume 1-10 were so congealed that we could not open the volumes. And volume 44-50 was prohibited to take photograph for preservation. According to the recent examination, it proved that this sutra is the treasure for the study of the characters made by Empress Wu Zetian(則天武后.) The characters made by Empress Wu Zetian(A.D. 625-705) are new shape of chinese characters which is different from the traditional characters. After the demise of the Queen, the characters were not used any more officially, but privately some people used the characters for personal tastes and interest. The characters in the sutra includes 512 characters of 13 kinds of Empress We Zetians'. Compared to the Tun-huang version of the sutra, this is far better treasure for the study of Empress We Zetians' characters in terms of the number of the character and the their use of frequency. The Avatamsaka Sutra of Shoso-in(正倉院) in japan copied in A.D. 768 does not use the Empress We Zetians' characters. In this respect, this Shilla Avatamsaka-Sutra is a unique one preserves the original forms of Chinese translation at that time.

• Korean Journal of Soil Science and Fertilizer
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• v.45 no.2
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• pp.293-300
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• 2012

This study was to investigate the unsuitable rate of the storage facilities, the changes in corrosion process over time after installation according to the status, the time to install the facilities, years elapsed after facilities installation, inspection of methods and motivation, and so on, based on the results of the inspection at the petroleum storage facilities conducted by domestic soil-relate specialized agency to derive optimal management plans which meet the status of soil contamination facilities. The results showed that the facilities more than 5 years after the initial leak test at the time of the installation need to be inspected periodically by considering costs of leak test and remediation of polluted soil. The inspection period can be decided by cost and leak test methods showing discrepancies for the results obtained from individual test whether it was direct or indirect. To compensate these matters, we suggested that the direct inspection method on regular schedule is recommended. On the other hand, the inspection can be voluntarily completed to ease burden of the results by inspection or equivalent level to this inspection method. Also, it may need improved construction supervision and performance test system to minimize the occurrence of the nature defects in installing the facilities as well as the upgrade program for the facilities during intervals of inspection period.

• Journal of the korean academy of Pediatric Dentistry
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• v.50 no.1
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• pp.113-120
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• 2023

Restoring composite resins with the optimal shades for all primary teeth is a great challenge for pediatric dentists. A newly developed single-shade composite resin can exhibit a color similar to that of the surrounding tooth structure based on the structural color phenomenon. This study aims to evaluate the color adjustment potential (CAP) of a single-shade composite resin compared to conventional multi-shade composite resins in primary teeth. A single-shade composite resin and two conventional multi-shade composite resins were included in this study. Two types of specimens, a single specimen and a dual specimen, were evaluated. For single specimens, duplications of the primary second molar denture teeth were made using experimental composite resins. For dual specimens, cavities were prepared on the buccal surfaces of extracted primary second molars and restored with experimental composite resins. The L^*, a^*, and b^* values were measured using a colorimeter for the extracted teeth and specimens. The mean ΔE_ab^* values for single and dual specimens and CAP were calculated. Bonferroni post-hoc analysis was performed to confirm the statistical significance between the ΔE_ab^* and CAP values of the experimental resins. Among the single specimens, the single-shade composite resin showed significantly higher ΔE_Single compared to other composite resins (p < 0.0167). There was no significant difference between ΔE_Dual for all experimental resins. The single-shade composite resin showed highest CAP compared to other multi-shade composite resins. A single-shade composite resin exhibited the most prominent color adaptability compared to other conventional multi-shade composite resins for primary second molars. A single-shade composite resin can simplify shade matching and provide esthetic outcomes for the restoration of primary second molars.

• Proceedings of the Korean Society of Developmental Biology Conference
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• 2003.10a
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• pp.132-132
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• 2003

멸종위험성이 높은 재래돼지를 유전자원으로서 안전하게 보존하고 유전적 다양성을 유지하기 위해 체내수정란의 동결보존 방법을 수행하였다. 재래돼지의 과배란유기는 altrenogest를 1일 20mg씩 18일 경구투여하고 PMSG 500~l,000IU 근육주사후 80시간에 hCG 500~750IU를 근육주사하였다. 발정이 관찰된 개체는 발정개시후 12시간과 24시간에 자연교배 또는 액상정액을 이용하여 2회씩 수정시켰다. 최종 수정후 5일째에 외과적으로 개복수술하여 FBS가 5% 첨가된 D-PBS 관류액으로 자궁으로부터 수정란을 회수하여 상실기, 배반포기, 확장배반포기의 수정란으로 구분하였다. 회수된 수정란은 FBS가 20% 첨가된 D-PBS의 0.4, 0.8, 1.4M glycerol 항동해제에 각 단계별로 10분씩 평형시킨후 수정란동결기(CL863, Australia)를 이용하여 18$^{\circ}C$부터 -7$^{\circ}C$까지 2$^{\circ}C$/min의 냉각속도와 -7$^{\circ}C$부터 -35$^{\circ}C$까지 0.5$^{\circ}C$/min의 동결속도(실험1), 1$^{\circ}C$/min의 냉각속도와 0.3$^{\circ}C$/min의 동결속도(실험 2)로 동결시켰다. 또한 FBS가 20% 첨가된 D-PBS의 ethylene glyco1(EG) 1.8M의 항동제에 15분간 평형시킨후 실험 1과 동일한 방법으로 동결시켰다(실험 3). 동결수정란의 융해는 37$^{\circ}C$의 항온수조에서 30초간 실시하였다. 항동해제로 glycerol을 이용한 수정란은 융해후 3가지 농도로 0.3M sucrose, 0.8M glycerol, 0.4M glycerol을 첨가한 D-PBS에 각각 10분씩 단계적으로 정치시킨 다음, 10% FBS 첨가 mNCSU-23으로 3회 세척했다. 항동해제로 EG를 이용한 수정란은 융해후 즉시 D-PBS에 각각 10분간 정치시킨 다음, 10% FBS 첨가 mNCSU-23으로 3회 세척했다. 항동해제가 제거된 수정란은 FBS가 10% 첨가된 mNCSU-23 배양액에서 39$^{\circ}C$, 5% $CO_2$ 배양기에 48시간 배양하면서 생존여부를 판단하였다. 실험 2에서 확장배반포배 수정란이 25.3%의 생존율을 나타내었으며, 실험 1과 실험 3에서는 수정란의 형태와 관계없이 생존성을 확인할 수 없었다. 이상의 결과로 보아 glycerol 완만동결에서는 확장배반포기 수정란 이상이 보존가능한 것으로 추정되나 더 추가적인 연구가 요구된다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.6
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• pp.2118-2123
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• 2010

Korean individual occupational exposure control is focused on the retrospective service to the over-exposed person by the reading of personal dosimeter. Since the radiophamaceuticals using in the nuclear medicine department are uncontained radiation sources, the potential exposure at working environment is very high. Moreover, a patient remains radioactive for hours or even days after the administration of a radiopharmaceutical for diagnosis or treatment. Thus, the proper working environmental exposure control must be established and executed to protect not only the affiliated employees, but also guardians accompanying patients and temporarily visiting public from the exposure by the patients. Japanese radiation protection law regulates working environmental radiation exposure by regularly measuring and filing the environmental dose for years. This study was aimed at measuring working environmental radiation dose in the nuclear medicine department of an university hospital located in Daejeon, Korea. We measured the accumulation radiation dose in air at 8 locations in the nuclear medicine department by using the same method as in Japan with glass dosimeters. The highest dose rate, 0.23 mSv per month, was measured at the waiting room, and the second one is at reception desk. Even though the doses were lower than the Korean constraint dose rate (0.3 mSv/week) at the boundary of the radiation controlled area, it was over the dose limit of public (1 mSv/y) and environment (0.25 mSv/y). Conclusionally, it was found that the new or additional procedure was necessary to less the exposure dose to the receptionist and guardians by the environmental radiation dose in the nuclear medicine department.

• Korean journal of communication and information
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• v.50
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• pp.164-186
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• 2010

Korean society, suffered from a severe currency crisis in 1997, had scarcely missed another market meltdown in 2008. However, neither economic fundamentals nor has political stability little to do with the recent crises. This paper thus projects the possibility of 'self-fulfilling crisis' in which the media took a critical part in amplifying 'crisis discourses.' For the purpose of understanding of media's impact on such a crisis, at first, this paper chose 'September Crisis in 2008' as a case study. While collecting news articles about the crisis, then, total 118 news articles collected from mainstream newspapers such as DongA-ilbo and Money Today have been analyzed in terms of media frame and discourse strategies. Research results showed that not only has the crisis discourse been shifted by economic situations, but the media re-constructed economic realities in way of justifying their political ideology and loyal readership. Taking those findings into consideration, in final, the authors urged the media to improve their performance by embracing more responsible and professional manners.

• Journal of Service Research and Studies
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• v.7 no.3
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• pp.21-36
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• 2017

Recently in information business, managing and auditing are getting more difficult because of enlargement, intellectualization and convergence. In addition, ordering organizations have been having a difficult time choosing a service because not only there is a huge overlap between information audit system and PMO but also the work boundaries of those two are not clear enough. As the demand that a business managing and auditing frame work need to be more developed in terms of independence, quality, economic feasibility and responsibility has been increased, the Korea Association Of Information Systems Audit has been attempting to improve business management and audit system by proposing Unified Project Management Framework whose process is approximately constructed. This study introduces Unified Project Management Framework which is all-encompassing from the ordering at the very beginning of business to the operating in the post-processing step and then verifies its work scope through a comparative analysis with existing management systems. Also, this thesis examines the necessity of unification of audit system and PMO by analysing existing similar systems. At the end, this study, analyses the suitability of Unified Project Management Framework by evaluating it with IT goal frame of COBIT5 which is constructed based on BSC performance management index. The result of the analysis is expected to help people in charge understanding the features of Unified Project Management Framework before they apply it to practical business.