• Journal of the Korean Society of Manufacturing Technology Engineers
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• v.26 no.1
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• pp.66-73
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• 2017

This study attempted to design lights with Type II distribution suitable for LED street lights based on the regulations of street light distribution developed by the Illuminating Engineering Society of North America (IESNA). The shape of an asymmetric lens, different from that of a rotationally symmetric lens, cannot be generated using a simple mathematical formula. In the first trial, the outline of the lens was fixed and simulated to confirm the distribution type. Following ISENA regulations, some problems that occurred during simulations and repeating was be modified that process is how we detected errors. Through optical research and simulations, a lens conforming to the regulations of Type II very short, Type II short, and Type II medium distributions was developed. A prototype was developed using simulation data and it was subjected to distribution tests. The results show that it can compare with property of Type II distribution.

• Progress in Medical Physics
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• v.29 no.4
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• pp.143-149
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• 2018

To verify the correlations between the clinical outcomes and physical factors of short-course chemoradiotherapy (SCRT) and long-course chemoradiotherapy (LCRT) with delayed surgery in patients with rectal cancer. Seventy-two patients with rectal cancer were enrolled in this study. Nineteen patients were treated with SCRT (25 Gy, 5 fractions) by intensity-modulated radiation therapy (IMRT), and 53 patients were treated with LCRT (50.4 Gy, 28 fractions) by three-dimensional conformal radiation therapy (3DCRT). Various physical factors for the target and organs at risk (OARs) were calculated to compare the clinical outcomes. The organ equivalent dose (OED) and lifetime attributable risk (LAR) of bowels and bladders were similar between the SCRT and LCRT groups, whereas the values of femurs were higher in the LCRT group. The equivalent uniform dose and normal tissue complication probability were higher in the LCRT than the SCRT group for most organs. Treatment complications, including anastomotic leakage, bowel adhesion, and hematologic toxicity, were not significantly different between SCRT and LCRT groups. CIs were $0.84{\pm}0.2$ and $0.61{\pm}0.1$ for SCRT and LCRT, respectively. The CVIs were $1.07{\pm}0.0$ and $1.10{\pm}0.1$, and the HIs were $0.09{\pm}0.0$ and $0.11{\pm}0.1$ for SCRT and LCRT, respectively. The sphincter-saving rates were 89.5% and 94.3% for SCRT and LCRT, respectively. The complete pathologic remission rates were 21.1% and 13.2%, and the down-staging rates were 47.4% and 26.4% for SCRT and LCRT, respectively. SCRT with IMRT is comparable to conventional LCRT in both physical indexes and clinical outcome. The preoperative SCRT, compensated by IMRT, is an effective and safe modality.

• The Korean Journal of Archival Studies
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• no.2
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• pp.195-230
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• 2000

In this paper I tried to get an overall view of the training course of German archivists, based on the curriculum of Marburger Archivschule. In Germany the short-term training courses are offered by some archives and also graduate-level course is offered by a college in Potzdam. Marburger Schule is, however, said to be a representative institute for training of archivists in Germany because the institute has a long history and its graduates have been playing a leading role in the archival science and archival administration of Germany. By examining the curriculum of the Marburger Schule, I tried to analyze the important elements which have decided the shaping of curriculum historically. I also examined the general prerequisite to be an archivist in Germany, including qualification-examination in order to see how the high standards of German archivists can be maintained. There are three kinds of training courses in Marburger Schule: course for academic archivists, course for administrative archivists, short-term course for complementary training. The former two main courses are runned in association with each state archives(staatliche Archive, Landesarchive) in the Federal Republic of Germany along the line of public regulation. These courses consist of theoretical and practical education. Marburger Schule is charged with the theoretical education, while each local government(Landesregiergung) runs the training system according to its own rules with autonomy. The education of archivists must be structured to fill the expected role in a society to which archivists belong. The image of archivist changes in the course of times and makes a greate many differences according to the conditions and tradition of a country. The whole system of formal education is also related with the style of managing of Archives in each country. Therefore an example of a country can not be taken so easily as a model. The education system of archivists must be interpreted in the relation with the historical condition of a country and its administrative system of archives.

• The Journal of Korean Medicine
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• v.33 no.4
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• pp.69-80
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• 2012

Objectives: The purpose of this study is to develop a clinical practice observation course in a medical school that can give Korean medical students opportunities to experience the treatment environment in western medicine, and to analyze the results of the course. Methods: A total of 47 (collection rate: 85.5%) senior students of the College of Korean medicine in Gyunggi-do replied to the survey. Twenty-seven of them were male and 20 were female. They participated in the clinical practice observation course in the medical school two days a week for two weeks (total: four days) in the academic year 2011-2012. Before the course, an orientation was held; and upon the students' completion of the course, they presented their experiences and replied to the survey. Results: According to the survey, the purpose of the course was well explained (91.5%), and the course was necessary for Korean medical students (97.9%). The four-day course duration was inappropriate, though (83%). The female students were more satisfied with their participation in the fourth year and with the timing of the course than the male students were. The students who finished the course at the surgical departments recognized the necessity of the course more than the students who finished the course at the non-surgical departments. The advantages of the course included opportunities to observe operation scenes and experience clinical treatment processes and systems. The weakness of the course included poor organization due to the short preparation period. Conclusions: The course was confirmed as necessary for Korean medical students so that they would understand the treatment environment in western medicine. Through the course, the students broadened the understanding of the disease and developed a strong sense of identity as Korean medical students. The duration of the course needs to be extended, and its structure should be enhanced. Furthermore, various educational programs that offer Korean medical students opportunities to experience various clinical cases need to be introduced.

• Journal of the Korean Society of Marine Environment & Safety
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• v.24 no.4
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• pp.430-437
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• 2018

For a ship navigating in waves, added resistance, sway force and yaw moment due to waves differ from still water conditions, which affects the maneuverability of the ship. Therefore, it is important to estimate the sway force and yaw moment generated by waves. In this study, numerical simulations were carried out to calculate the hydrodynamic forces acting on a barge in still water and waves using CFD. Based on the results, the characteristics of course stability of a barge were investigated and analyzed. The hydrodynamic forces acting on the barge in waves were stronger than in still water, and it was confirmed that hydrodynamic forces become greater as wavelength becomes longer. In long wavelength regions, the (-) value of the yaw damping lever was larger than in still water. However, in short wavelength regions and when wavelength coincided with the length of the ship, values were smaller than in still water. In this region, it can be assumed that course stability improved. In other words, in long wavelength regions, the course stability of the barge was worse than in still water and short wavelength regions. Therefore, attention is required for safe navigation in long wavelength regions.

• 제어로봇시스템학회:학술대회논문집
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• 2004.08a
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• pp.1195-1200
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• 2004

We introduce an introductory engineering education course for engineering majors and non-engineering majors. This course does not require any previous knowledge and experience on engineering. It requires strong curiosities and imaginations on current and future society we live in, where technology is inseparable ingredient. Course encourages attendees to explore fundamental issues of engineering: what is proper technology and what are proper ways of exercising engineering, issues dealt in soft engineering. Since course topics cover many aspects of technology, traditional learning methods fail to be successful and efficient. Various efficient learning methods have been proposed and implemented. We utilize various interactive tangible media, which include simulated thought experiments and physical media experiences. About 20 episodes in short film format are produced based on scenario written according to related issues selected. Physical media like interactive robots are introduced for attendees' stimulated experiences. We summarize our exciting experiments on interactive teaching experiences at Pusan National University which include on/off-line interactions, assignments, projects, and evaluations.

• Journal of Soil and Groundwater Environment
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• v.6 no.1
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• pp.85-88
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• 2001

• The Journal of Industrial Distribution & Business
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• v.9 no.6
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• pp.15-24
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• 2018

Purpose - The adjustment of one country's monetary policy can cause the macroeconomic change of other countries. Due to this, this paper attempts to analyze the impact of China's monetary policy on South Korea's exchange rate. Research design, data, and methodology - Based on the flexible-price monetary model, sets of annual time series from 1980 to 2017 are employed to perform an empirical estimation. The vector error correction model is also used to exploit the short-run relationship between both of them. Of course, the South Korea's real GDP, the China's real GDP, South Korea's interest rate, the South Korea's interest rate and the South Korea's monetary supply are treated as independent variables in this paper. Result - The long-run findings reveal that the China's money supply has a negative effect on South Korea's exchange rate. Respectively, the short-run findings depicts that the China's money supply has negative a effect on South Korea's exchange rate. Of course, other variables selected in this paper also have an effect on South Korea's exchange rate whatever positive or negative. Conclusions - As the empirical evidence shows, the China's monetary policy has a negative effect on South Korea's exchange rate whenever in the long run or in the short run.

• Korean Institute of Interior Design Journal
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• no.20
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• pp.3-9
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• 1999

The purpose of this study was to verify the stability of environmental disposition through analyzing the short term effect of the 'Interior Design History' course on students environmental dispositions, especially their interior image preferences toward traditional/modern, female/masculine, and simple/complex characteristics. The pre-test post-test control group experimental design was used. The independent variable was the experience of the Interior Design History course, and the dependent variable was environmental disposition measured by IIPS(Interior Image Preference Scale). The measurements were done at both beginning and end of fall semester, 1997. Subjects were using 71 undergraduate students of Drafting course (control group) and 35 undergraduate students of Interior Design History course (experimental group) at Y University. Data were analyzed using frequency, percentage, mean, and F-test through ANOCOVA. This research revealed no effect of the Interior Design History course on students interior environmental dispositions. The stability of those environmental dispositions and also the validity of the IIPS were proved.

• Radiation Oncology Journal
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• v.31 no.4
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• pp.216-221
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• 2013

Purpose: The purpose of this retrospective study was to evaluate the efficacy and feasibility of short-course hypofractionated radiotherapy (RT) for the palliation of uterine cervical cancer. Materials and Methods: Seventeen patients with cancer of the uterine cervix, who underwent palliative hypofractionated 3-dimensional conformal radiotherapy between January 2002 and June 2012, were retrospectively analyzed. RT was delivered to symptomatic lesions (both the primary mass and/or metastatic regional lymph nodes). The total dose was 20 to 25 Gy (median, 25 Gy) in 5 Gy daily fractions. Results: The median follow-up duration was 12.2 months (range, 4 to 24 months). The median survival time was 7.8 months (range, 4 to 24 months). Vaginal bleeding was the most common presenting symptom followed by pelvic pain (9 patients). The overall response rates were 93.8% and 66.7% for vaginal bleeding control and pelvic pain, respectively. Nine patients did not have any acute side effects and 7 patients showed minor gastrointestinal toxicity. Only 1 patient had grade 3 diarrhea 1 week after completion of treatment, which was successfully treated conservatively. Late complications occurred in 4 patients; however, none of these were of grade 3 or higher severity. Conclusion: Short-course hypofractionated RT was effective and well tolerated as palliative treatment for uterine cervical cancer.