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산업연관분석을 이용한 브렉시트가 한국중소기업에 미치는 영향 분석
김대종(Dae-Jong Kim) 한국경영학회 2016 한국경영학회 통합학술발표논문집 Vol.2016 No.8
본 논문의 연구목적은 브렉시트 이후 중소기업이 얼마나 영향을 받는가? 를 연구한 것이다. 연구방법은 산업연관분석을 이용했다. 연구결과는 다음과 같다. 첫째 2015년 총수출액 5,199억 달러, 영국수출은 74억 달러이다. 영국수출은 우리나라 총수출의 약 1.4% 정도이다. 브렉시트로 우리나라 전체 국내총생산에 미치는 피해액은 약 1.6조원 정도로 추정된다. 중소기업이 우리나라 전체 제조업의 약 56%, 영국수출의 약 12%를 차지하고 있다. 둘째 중소기업의 손실추정액은 약 9,400억원 정도로 추정된다. 약 1조원에 이르는 금액은 큰 금액이므로 대비를 해야한다. 정책적 시사점은 첫째 중소기업이 내수위주의 경영에서 벗어나 수출지향으로 나아가도록 지원해야 한다. 둘째 수출창구를 단일화하여 중소기업의 수출을 도와야 한다. 본 논문의 의의는 브렉시트로 인하여 중소기업에 미치는 영향을 분석한 것에 있다. The purpose of this research paper How does this affect how SMEs sheet after Brexit? It will study the Research methods were used to analyze Input-Output Onalysis. The results were as follows. First, in 2015 total exports 519.9 billion US dollars, British exports at $ 7.4 billion. UK exports is about 1.4% of Korea"s total exports. Brexit damages to the sheet on the entire country"s gross domestic product is estimated to be about 1.6 trillion won. SMEs account for approximately 56% of total manufacturing country, about 12% of UK exports.
콘택트렌즈 착용자의 굴절교정이상이 삶의 질에 미치는 영향
김대종(Dae-Jong Kim) 한국안광학회 2019 한국안광학회지 Vol.24 No.2
Purpose: The purpose of this study was to investigate the effect of refractive anomalies on contact lens wearers’ quality of life. Methods: We analyzed a total of 103 contact lens users without eye disease through a vison test and an automated refraction test after the patients filled in an National Eye Institute Visual Function (NEI-VF) questionnaire. Results: Astigmatism was observed in 66.0% of the contact lens wearers. Of the total participants, 45.0% wore lenses without undergoing a refraction test. and 30.0% of the participants had different refractive powers on both eyes but were prescribed lenses with the same refractive power; 21.0% of the participants had a self-prescription. We found a significant correlation between the refractive error, spherical refractive power, and cylindrical power in both the eyes after the use of contact lenses. There was a decrease in the near vision, distant vision, and social quality of life of the participants. Conclusions: In conclusion, we found a significant correlation between the refractive corrections in contact lens wearers following vision tests and automated refraction tests, as well as a questionnaire analysis for near vision, distant vision, and social functioning of the participants. Therefore, the degree of vision correction through contact lens use significantly affects patients’ quality of life.
김대종(Dae-Jong Kim) 한국안광학회 2019 한국안광학회지 Vol.24 No.2
Purpose: We aimed to determine the relationship between blood pressure and blood glucose levels and visual acuity that cannot be corrected in refraction examinations. Methods: We measured the participants’ blood pressure and blood glucose levels to determine whether the presence of high blood pressure or diabetes was apprehended through the previously conducted survey and analyzed its influence on the non-corrected vision by performing refraction examinations. Results: Through the survey, high blood pressure was determined in 40 patients (43.8%) and not determined in 59 (56.2%). Diabetes was determined in 27 patients (25.7%) and not determined in 77 (77.3%). The participants were classified according to the results of the blood pressure and blood glucose measurements. The blood pressure was normal in 47 (44.8%) and slightly elevated in 23 (21.9%) participants. Nineteen participants (18.1%) had stage 1 hypertension, 2 (1.9%) had stage 2 hypertension, and 11 (10.5%) had a low-systolic blood pressure. In 52 participants (49.5%), the results of the blood glucose measurements were normal, and 53 (50.5%) had diabetes. We found a negative, but not significant, correlation between corrected vision and the blood pressure and blood glucose levels. However, the correlation between non-corrected vision and the blood pressure and blood glucose levels was significant (R2 = 0.867 and R2 = 0.871, respectively). Conclusions: The results of this study show that the blood pressure and blood glucose levels correlated with visual acuity in patients in whom vision could not be corrected in the refraction examination. Thus, older patients should be advised that high blood pressure and diabetes induce ophthalmologic diseases. Furthermore, if the vision cannot be corrected during refraction examinations in clinical practice, the patients should be informed of the possibility of an eye disease related to high blood pressure or diabetes.
김대종(Dae-Jong Kim),박종덕(Jong-Duck Park) 대한공간정보학회 2009 한국공간정보학회 학술대회 Vol.2009 No.9
현재 KOPSS에서 개발하고 있는 10개의 모형은 속성자료뿐만 아니라 공간자료 그리고 시공간 자료를 필요로 한다. 이러한 자료들은 그 출처와 형태가 다양하기 때문에 KOPSS에서 바로 활용할 수 있는 데이터마트 구축이 필수적이다. KOPSS의 데이터마트는 KLIS, UPIS, AIS 등 다양한 시스템의 데이터웨어하우스로부터 필요한 데이터를 수집 및 가공ㆍ처리하여 구축하고 있다.
Measurements of Radial In-plane Vibration Characteristics of Piezoelectric Disk Transducers
Dae Jong Kim(김대종),Se Hwan Oh(오세환),Jin Oh Kim(김진오) 한국소음진동공학회 2015 한국소음진동공학회 논문집 Vol.25 No.1
The paper experimentally deals with the radial in-plane vibration characteristics of disk-shaped piezoelectric transducers. The radial in-plane motion, which is induced due to Poisson’s ratio in the piezoelectric disk polarized in the thickness direction, was measured by using an in-plane laser vibrometer, and the natural frequencies were measured by using an impedance analyzer. The experimental results have been compared with theoretical predictions obtained by simplified theoretical and finite-element analyses. It appears that the fundamental mode of a piezoelectric disk transducer is a radial mode and its radial displacement distribution from the center to the perimeter is not monotonic but shows maximum slightly apart from the perimeter. The theoretically-calculated fundamental frequencies agree well with the finite-element results for small thickness-to-diameter ratio, and they are accurate within 7 % error for the ratio up to 0.4.