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- 저자 : 신종연(Jong-Yeon Shin) (검색결과 3 건)
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Effects of Nature-Based Programs for Workers in Korea: A Systematic Review
신종연(Jong-Yeon Shin)신원섭(Won-Sop Shin) 인간식물환경학회 2020 인간식물환경학회지 Vol.23 No.2
The aim of this study was to review previous literature to determine the effects of nature-based program for workers. This systematic review was conducted in accordance with National Evidence-based Healthcare Collaborating Agency’s guidance for undertaking systematic reviews for intervention. Literature search was performed using National Assembly Digital Library, Korean Studies Information Service System, and Korea Education & Research Information Service for literature published until March 2019. The participants were full-time workers, and intervention of nature-based programs was conducted in the outdoor, indoor, and indirect nature contact exposures, with comparators in the control group who did not receive the treatment. The results showed that the programs were effective in physical, psychological, and social health. The methodological quality of randomized controlled trials (RCT) was assessed using the Cochrane Risk of Bias(RoB) tool, while non-randomized controlled trials (N-RCT) were assessed using the Cochrane Risk of bias assessment tool for non-randomized studuies (RoBANS). A total of 16 studies were selected for assessment: two RCTs, 10 N-RCTs, and four one-group pretest-posttest designs. Most interventions were provided at the workplace and in the community. There were many kinds of nature-based interventions, and forest therapy and horticultural therapy programs were most common. Various interventions for workers effectively improved job stress, depression, serum cortisol and stress-response. However, the included studies lacked methodological rigor. Future research is needed to evaluate the long-term effectiveness of nature-based programs for workers using rigorous research designs.
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컬러 레이저 프린터에서 검출되는 Yellow Dots의 특성
최영호(Young-Ho Choi),이덕호(Doek-Ho Lee),윤영미(Young-Mi Yoon),홍현식(Heon-Sich Hong),신종연(Jong-Yeon Shin),윤기형(Kee-Hyung Yoon) 한국콘텐츠학회 2012 한국콘텐츠학회논문지 Vol.12 No.12
본 논문에서는 HP 컬러 레이저 프린터 기기의 출력물에 나타나는 Yellow Dots의 형태를 분석하고자, 각각 시간의 경과, 연과 월의 경과 그리고 동일한 기종에 따른 Yellow Dots의 특성을 실험하였다. 그 결과, 동일한 프린터기기의 출력물에서는 시간의 경과, 연과 월의 경과에서 나타나는 Yellow Dots의 형태가 동일한 것을 알 수 있었다. HP 컬러 레이저젯 프린터 기기에는 Xerox사에서 출시된 컬러 레이저젯 프린터기기와는 다르게 시간과 날짜 정보가 임베딩 되지 않았다는 것을 가정 할 수 있었다. 또한 시리얼 넘버가 다른 프린터기기에서는 유사하지만 다른 형태의 Yellow Dots가 나타나는 것을 알 수 있었으며, 이것은 프린터기기 구분에 있어 큰 도움이 된다. 마지막으로 실험에 사용된 모든 HP 컬러 레이저 프린터 기기들의 Yellow Dots를 분석한 결과, 동일한 패턴을 찾을 수 있었으며, 그 결과를 통하여 제조사를 파악 할 수 있었다. 향후 Yellow Dots 패턴을 해독하고 나아가 타 제조사의 Yellow Dots를 검출 및 분석하는 연구가 진행되어져야 한다. To analyzed the shape of Yellow Dots which appeared on the paper printed HP color laser printer, and analyzed the characteristic of Yellow Dots according to time, month, year and same printers. As a result, documents that printed in same printers had an identical Yellow Dots’s shapes according to time, month, year. It was presupposed that was not embedded time and date information in HP Color LaserJet printers against Xerox, and printers which have different serial number had similar shapes but it was not identical Yellow Dots. Finally, it was found to be identical patterns in Yellow Dots of HP Color LaserJet printers used analysis. Depending on the results, it could understand HP’s pattern. In the future, it will decipher patterns of Yellow Dots which have other informations to include other printer manufacturer.
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최한철,고영무,정재헌,신종연,김일선,최성욱,정효수 대한치과기재학회 1999 대한치과재료학회지 Vol.26 No.4
Dental magnetic materials have been applied to removable prosthetic appliances, maxillofacial prostheses, obturator and dental implant but they still have some problems such as low corrosion resistance in oral environments. To increase the corrosion resistance of dental magnetic materials, surfaces of Sm-Co and Nd-Fe-B based magnetic materials were plated with TiN and then electrochemical corrosion test were performed in 4 kinds of electrolyte solutions(0.9% NaCl. 1% lactic acid, 0.05% HCl and modified Fusayama's artificial saliva). From this study, corrosion behavior, amount of elements released, mean average surface roughness values and the changing of mean surface microhardness values were measured comparing with control group of non-sputtered plating magnetic materials. The results were as follows: 1. TiN layer coated on magnet grows into preferred direction with lamellar structure and its thickness is 3.0㎛. 2. Sm-Co base magnetic materials coated with TiN have good corrosion resistance in 1% lactic acid and their pitting corrosion can not be seen. 3. Nd-Fe-B base magnetic materials coated with TiN showed good tendency of corrosion resistance in 0.05% HCl solution. 4. The amount of elements released from both Sm-Co and Nd-Fe-B base magnetic materials coated with TiN were more significantly decreased than that of uncoated magnetic materials. 5. The mean surface roughness values of both Sm-Co and Nd-Fe-B base magnetic materials coated with TiN were smooth than that of uncoated magnetic materials after corrosion test. 6. The decreasing rate of microhardness of both Sm-Co and Nd-Fe-B base magnetic materials coated with TiN were lower than that of uncoated magnetic materials after corrosion test. 7. Dental magnetic materials coated with TiN produced various corrosion products such as TiO, TiO₂, Ti₂O₃on the surface and resulted in better corrosion resistance than uncoated magnetic materials. In conclusion, it is considered that the corrosion problem of dental magnetic materials could be solved to some extent by EB-PVD with TiN on the surface of dental magnetic materials.
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