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玄宗勳 陸軍士官學校 1980 한국군사학논집 Vol.20 No.-
Education directed toward the creative and practical phases of economic design is the most distinctive feature of engineering curricula. Graphics are courses to develop specific and essential abilities which devote to engineering design and analysis. Its value as a skill alone does not justify its inclusion in curriculum. The emphasis should be put on spatial visualization, experinence in creative thinking, and the ability to convey ideas. To devote to engineering analysis and design, we have to develop the well-balanced course content in keeping pace with current status and trends in foreign countries. It is believed that Engineering drawings and Descriptive Geometry courses should be integrated and correlated each other. The course is emphasized to apply graphical principles and ideas in engineering practices.
대구광역시 소재 대형할인점 전면공간 활용실태 조사 및 계획방향에 관한 연구
현종훈,최무혁,김현주,박준웅,고은형 대한건축학회 2006 대한건축학회논문집 Vol.22 No.9
Consumer stores have shown a rapid growth since the mid 90's and at present they're the most representative retail outlets in Korea. They have a very close connection to the average Korean's everyday life. Under these circumstances, consumers are deciding to choose where to shop according to their preferences to physical environment of the store.To meet the need of users with diverse and comfortable spaces for shopping, managers of consumer stores are interested in improving the open space of the store as well as the interior design. Compared with the interior space of the consumer store, the front-space hasn't been really designed to satisfy the needs of the people. Even when the front-space has been designed considering the people's desire, it is often used in different ways. This study analyzes the present status and the characteristics of physical facilities of the front-spaces of consumer stores in the relationship with the behavior pattern of users. The objective of the study is to propose a design guideline of the front-space, and finally to enhance the overall qualities of the facilities.
玄宗勳 陸軍士官學校 1974 한국군사학논집 Vol.12 No.-
It is evident that there must be a vast difference between the projective geometry and the descriptive geometry. However, in both geometries between a figure and its projection there exists the relation of one-to-one correspondence which is invariant under projection. The idea of one-to-one correspondence in homological figure provides us the means for transformations of the figure from a view to the related view, and a convenient basis of solutions of the interesection in the descriptive geometry. the principles of the projective geometry will serve to have some understanding of modes of attack on the descriptive geometry.
함대공 유도탄 방어 유도무기의 점화안전장치 조립체 성능시험 방법 개선 연구
현종훈,박세혁,최준범,서보길,김상운,김효진 국방기술품질원 2023 국방품질연구논집 Vol.5 No.1
In this study, the performance test method of the ignition safety device assembly of a surface-to-air anti-missile was improved. The testing items of the ignition stabilizer assembly performance test measure maximum pressure and total combustion time, and use a pressure sensor for measurement. The ignition safety device assembly is a product that performs a critical function of igniting the propulsion engine when launching a guided missile, and it is important to secure normal performance. In fact, after measuring the maximum pressure and total combustion time using a pressure sensor during the performance test, a quantitative standard is required for each data value analysis and a pressure sensor that can minimize errors should be used. Therefore, this study presents a method to quantify and analyze the maximum pressure and total combustion time measurement data for the ignition safety device assembly performance test, and verify the optimal type of pressure sensor to exclude measurement errors.
현종훈,박용정,송영구,한상훈,박순영,김신혜,박지수,전소영,이혜선,이경화 연세대학교의과대학 2022 Yonsei medical journal Vol.63 No.12
Purpose: The association between reactogenicity and immunogenicity of the ChAdOx1 nCOV-19 is controversial. We aimed to evaluate this association among South Korean healthcare workers (HCWs). Materials and Methods: Participants received two doses of the ChAdOx1vaccine 12 weeks apart. Blood samples were tested for anti-severe acute respiratory syndrome-coronavirus-2 (SARS-CoV-2) spike protein receptor binding domain antibodies about 2 months after the first and second doses using the Elecsys Anti-SARS-CoV-2 S assay kits. Adverse events were noted using an online self-reporting questionnaire. Results: Among the 232 HCWs, pain (85.78% after the first dose vs. 58.62% after the second dose, p<0.001) was the most prominent local reaction, and myalgia or fatigue (84.05% vs. 53.02%, p<0.001) was the most prominent systemic reaction. The frequency of all adverse events was significantly reduced after the second dose. After the first dose, the anti-SARS-CoV-2 S showed significantly higher titer in the group with swelling, itching, fever, and nausea. Also, the anti-SARS-CoV-2 S titer significantly increased as the grade of fever (p=0.007) and duration of fever (p=0.026) increased; however, there was no significant correlation between immunogenicity and adverse event after the second dose. The group with pain after the first dose showed a greater increase in the anti-SARS-CoV-2 S difference between the second and first doses compared to the group without pain (542.2 U/mL vs. 363.8 U/mL, p=0.037). Conclusion: The frequency of adverse events occurring after the first dose of the ChAdOx1 was significantly reduced after the second dose. Interestingly, the elevation of anti-SARS-CoV-2 S titer was significantly increased in the group with pain after the first dose.