http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
최기영(Kiyoung Choi) 한국항만경제학회 2011 韓國港灣經濟學會誌 Vol.27 No.3
평택항이 자동차 수출입 특화항으로 부상하고 있다. 울산항에 이어 줄곧 2위항 자리를 지켜 온 평택항이 2010년 우리나라 31개 항만 중 자동차 수출입 처리 실적 전국 1위항을 기록했다. 2011년에는 수출입 자동차 물동량이 100만대를 넘어설 전망이다. 평택항은 특히 외국산 수입자동자들에게 인기가 높다. 2011년 상반기 수입물량이 2010년 한해 물량에 거의 육박하고 있는 수준이다. 본 연구는 수입자동차들이 평택항 선택 결정 요인과 평택항의 개선 필요 요인게 대한 관계자들의 견해를 묻고 그 중요도를 분석했다. 본 연구는 2011년 7월 현재 평택항을 이용하고 있는 14개 수입자동차 회사를 대상으로 설문조사와 AHP분석 방법을 통해 실시했다. 본 연구에 따르면 우리나라 외국산 수입자동자들의 항만선택 시 가장 중요한 결정요인은 ‘항만입지’이며, 개선이 가장 시급한 요인은 ‘항만시설’로 분석됐다. Pyeongtaek Port is becoming a specialized for importing or exporting cars. In 2010, Pyeongtaek Port became the major port, out of the 31 ports in Korea, for import and export of cars. Usage of this port was especially high for imported cars. In 2011, more than 1 million cars are expected to be imported or exported via Pyeongtaek Port. This researeh analyses the factors for selecting Pyeongtaek Port for imported cars and recommendations required to improve Pyeongtaek Port. To do this, questionnaires were given to 14 imported car companies that currently, July 2011, use Pyeongtaek Port and used AHP criteria to asses the importances of each factors. According to this researeh, the most important determinant for the use of Pyeongtaek Port is ‘Port Location’ followed by ‘Port Cost’, ‘Port Facility’, ‘Port Service’, ‘Port Marketing' and ‘Port Cargo Volume’, in the order of importance. Also, imported car companies say that the factor in need for the most urgent improvement is ‘Port Facilities’ in Pyeongtaek Port.
최수은(Sueun Choi),최도선(Doseon Choi),장성재(Sung Jae Jang),박성준(SungJun Park),윤충식(Chungsik Yoon),이기영(Kiyoung Lee),고광표(GwangPyo Ko),이정훈(Cheonghoon Lee) 한국환경보건학회 2022 한국환경보건학회지 Vol.48 No.2
Background: The recent COVID-19 pandemic is one of the worst disease outbreaks of the 21th century. Due to a lack of reliable antiviral therapeutics, wearing face masks is recommended to prevent airborne infection originating from virus-contaminated bioaerosols. Objectives: The aim of this study was to evaluate the filtration efficiencies of face masks that are commercially available in South Korea for a biological aerosol of Staphylococcus aureus (S. aureus) and murine coronavirus, a well-known surrogate for human coronaviruses. Methods: We collected six different kinds of commercial masks: two Korea Filter (KF)94 (KF94-1, KF94-2) masks, one surgical (Surgical-1) mask, one anti-droplet (KF-AD-1) mask, and two dust (Dust-1, Dust-2) face masks. S. aureus (ATCC 6538), a well-performing test bacteria and murine coronavirus (ATCC VR-764) were prepared under a suitable culture condition. Then, a mask biological filtration tester was used to examine the microbial filtration efficiencies of masks. Test microorganisms were quantitatively measured via cultivation methods and microbial filtration efficiencies were calculated appropriately. Results: All face masks showed over 99.6% filtration efficiency for S. aureus or murine coronavirus. There were no significant differences among the bacterial filtration efficiencies of the face masks. KF94-1 (99.97±0.08%) and Dust-1 mask (99.97±0.07%) showed the highest (over 99.9%) filtration efficiency for murine coronavirus. KF94-1 or Dust-1 masks showed a significant virus filtration efficiency compared to Surgical-1 mask (p<0.05; Mann-Whitney U test). Conclusions: All the commercially available face masks used in this study can filter S. aureus or murine coronavirus in bioaerosols efficiently, regardless of the mask type. Therefore, our results suggest that wearing a certified face mask is a reliable means to prevent the transmission of infectious airborne diseases via biological aerosols.