기내 서비스 환경에 대한 승무원의 인식이 동기부여 및 서비스 지향성을 매개로 하여 서비스 제공행동에 미치는 영향에 관한 연구

최덕진,김문선,김기웅,박성식,Choi, Duk Jin,Kim, Mun Sun,Kim, Kee Woong,Park, Sung Sik 한국항공운항학회 2013 한국항공운항학회지 Vol.21 No.4

In-flight service, depending on the perceptions of service satisfaction because ever turns into a variable, which enables service providers the flexibility of a variable in the end flight service to suit your needs to providing comprehensive and proactive services of the crew will be motivated. In addition, the service provider's motivation to work in a confined space on board the flight service characteristics in-flight service will be a major impact on the environment. This service-oriented environment, in-flight service and motivation in order to verify the impact on services in Cape factors as independent variables and the dependent variable service-oriented multi-regression analysis was performed. As a result, the motivation of the crew and the crew of the service-oriented, with a voluntary service crew services dependent variable parameters that affect the behavior of the acts. Services and service-oriented motivation Cape factors significantly influence both the irradiated while the impact on voluntary service and results verification service aesthetics, cleanliness, and physical service environment, only the voluntary services of the crew a positive effect on that the effects were investigated.

황산수와 저속습식마쇄기로 생산된 고품질 순환 잔골재의 콘크리트 압축강도에 관한 실험적 연구

최덕진(Choi, Duck-Jin),이대근(Lee, Dae-Guen),김하석(Kim, Ha-Suk),곽은구(Kawk, Eun-Gu),강철(Kang, Chul),김진만(Kim, Jin-Man) 한국콘크리트학회 2008 한국콘크리트학회 학술대회 논문집 Vol.2008 No.11

모듈화 패널의 냉 · 난방에너지 저감 효과

최덕진(Choi, Duck-Jin),김한봄(Kim, Han-Bom),유상열(Yoo, Sang-Yeol) 대한건축학회 2015 대한건축학회 학술발표대회 논문집 Vol.2015 No.-

고로슬래그 미분말과 CA계 혼합물을 사용한 압출성형패널 특성

최덕진(Choi, Duck-Jin),김진만(Kim, Jin-Man),최세진(Choi, Se-Jin) 대한건축학회 2014 大韓建築學會論文集 : 構造系 Vol.30 No.7

Due to the development of steel industry, more than 12 million tons of ground granulated blast-furnace slag(GG) have produced every year. On the other hand, the amount of GG got used has been discreasing gradually due to the construction market diminished. So it is needed to develop some various usage for GG including increasing the amount of GG in concrete and concrete products. Even if the extruded panel mainly used for the external drywall having superior performance to being needed, it has not been widely utilized in the drywall market for an interior material, due to its low economic advantage. This study have checked the engineering characteristics of various extruded panels, depending on the different amounts of blast furnace slag(GG), CA binder and hemihydrate gypsum(HG), and finally determined the optimum mixture ratio of an environmentally friendly non-OPC extruded panel, with high economic and environmental feasibility. The experimental results of this study confirmed that the amount of CA could replace up to at least 10wt% of the total binder in the non-OPC extruded panel with GG in the comprehensive consideration of its strength and moldability. Then, the optimum blending ratio of alpha-hemihydrate gypsum(HG) was 20wt% of CA.

황산수와 저속습식마쇄기로 생산된 고품질 순환 잔골재의 모르타르 압축강도에 관한 실험적 연구

최덕진(Choi, Duck-Jin),이대근(Lee, Dae-Guen),한상일(Han, Sang-Il),김하석(Kim, Ha-Suk),전명훈(Jun, Myong-Hun),김진만(Kim, Jin-Man) 한국콘크리트학회 2008 한국콘크리트학회 학술대회 논문집 Vol.2008 No.5

정수슬러지로 합성한 인공제올라이트와 소석회의 수화응결특성

라정민,최덕진,김민길,김진만,La, Jung-Min,Choi, Duk-Jin,Kim, Min-Gil,Kim, Jin-Man 한국건설순환자원학회 2010 한국건설순환자원학회지 Vol.5 No.4

정수 슬러지는 해양투기가 금지됨에 따라 매립되거나, 성토재, 복토재 등과 부가가치가 거의 없는 용도로 활용되고 있다. 정수슬러지는 하수슬러지와는 달리 유기물의 함유량이 높지 않은 무기성 슬러지이며, 적절히 가공할 경우 유용한 자원으로 사용할 수 있음에도 불구하고 적절히 활용되지 못하고 있다. 본 연구팀은 정수슬러지를 인산으로 수열반응하여 인공제올라이트를 합성하였다. 합성된 제올라이트는 다공성으로 탈취능이 매우 우수한 분말이지만, 건축자재로 사용하기 위해서는 일정한 형상으로 고화할 필요성이 있다. 본 연구에서는 합성한 인공제올라이트의 특성과 이를 다양한 고화제로 고화하여 그 특성을 분석한 것이다. 실험결과 소석회가 가장 적절한 고화특성을 보이고 있었으며, 최적 사용조건은 전체 분말 중량의 30-60%인 것으로 나타났다. 고화체의 탈취 성능은 원료인 인공제올라이트에는 못미치지만 매우 우수한 것으로 나타나 건축물용 탈취 재료로서의 사용가능성을 확인할 수 있었다. On the international provision on prohibition of ocean dumping of waste, tap water sludge has been buried or recycled on th low value added product as landfill. Due to the tap water sludge having high inorganic content, differing from the sewage sludge, it is possible to use as a usable resource by suitable process. We have studied on hydro thermal processing of tap water sludge with phosphoric acid and finally synthesize a artificial zeolite having a deodorization property. To use it as a building material, it has to be solidification. This study is on the properties of artificial zeolite synthsized and solidification properties by various types of solidifier. It is showed that the slaked lime is the best on setting property and its optimum content is 30-60 weight proportion. Solid by solidified by slaked lime has low strength and excellent deodorization performance, so it is possible to use as a functional pannel as gypsum board.

항공서비스 교육과정에 대한 학생의 인식, 서비스 호스피탈리티 및 서비스 지향성에 관한 연구 : CIPP 평가모형을 중심으로

박지영,김기웅,최덕진,박성식,Park, Ji-Young,Kim, Kee-Woong,Choi, Duk-Jin,Park, Sung-Sik 한국항공운항학회 2016 한국항공운항학회지 Vol.24 No.3

This study examines the awareness of the curriculum of the cabin service major students at 2 year colleges through the CIPP (Context, Input, Process, Product) evaluation model and an empirical analysis on how their awareness affects Service Orientation and Service Hospitality. It was proven that the CIPP evaluation model has a positive effect on the satisfaction of their department, and also has a meaningful effect on Service Hospitality and Service Orientation statistically. However, the satisfaction of their department itself is not associated with the increase of Service Orientation and Service Hospitality so it negatively affected them. Moreover, both the Service Management program(Process) and Service Attitude(Product) have a meaningful effect on Service Hospitality, and Service Hospitality also has a meaningful effect on Service Orientation. So it resulted in a casual relationship among them. As a result, it is desperately necessary to promote an educational environment that will increase the satisfaction of the department and help students to become flight attendants. It is also necessary to increase awareness of the Service Management program(Process) and Service Attitude(Product).

잔골재로서의 바텀애시를 사용한 플라이애시 시멘트 압출경화체의 공학적 특성

이명진,김진만,한동엽,최덕진,이근우,Lee, Myeong-Jin,Kim, Jin-Man,Han, Dong-Yeop,Choi, Duck-Jin,Lee, Keun-Woo 한국건설순환자원학회 2015 한국건설순환자원학회 논문집 Vol.3 No.3

The aim of this research is providing the fundamental data for treating and recycling the byproducts by using the wet processed bottom ash as a fine aggregate replacement for cement-based extruded panel. Although the cement-based extruded panel was used mainly as a cladding component with its high strength and outstanding durability, it was hardly spread because of low economic feasibility due to the high cost of additives or fibers which were used to achieve 14 MPa of flexural strength as a cladding material. As a solution of this drawback, by the previous research, it was possible to replace cement by fly ash up to 80 % by decreasing quality criteria with restricting the application to indoor purpose. In this research, based on the previous research, by using the bottom ash as a replacement of fly ash, improvement of shape retention performance is tried. As a result of the experiment on evaluating the optimum content and PSD of bottom ash, as the fineness modulus and content of bottom ash was increased, the extruding performance was decreased and penetration resistance was increased. Additionally, the optimum content and the maximum particle size was found as 20 %, and 0.3 mm, respectively. 본 연구의 목적은 석탄회 중 바텀애시를 이용하여 시멘트압출성형 패널에 잔골재대체재(보형성 유지)의 용도로 적용을 함으로써 산업 부산물을 처리함과 동시에 새로운 용도를 창출하기 위한 기초자료를 제시하는 것이다. 선행연구에서는 건식벽체로 사용되는 시멘트 압출성형 패널에 비정제 플라이애시를 시멘트계 재료로 대체하여, 최대 80%까지 대체가 가능하였다. 하지만, 압출성형체는 압출 직후 자중에 의해 약간의 침하가 발생을 하게 되는데, 이는 반응성이 느린 플라이애시를 대량 사용한 경우에 늦은 경화로 인한 것이다. 본 연구에서는 자중에 의한 침하에 저항하기 위한 용도로 바텀애시를 잔골재대체재로의 사용가능성과 최적사용량을 검토하였다. 그 결과 바텀애시의 대체율이 증가함에 따라 압출경화체의 압출성은 저하 되었지만 관입저항성은 증가하였다. 그러므로 기존의 자중에 의한 패널의 침하현상은 잔골재 대체재를 사용함으로써 보완이 가능하였다. 또한 바텀애시 대체율 20%, 최대 입자 크기 0.6mm, 오토클레이브 양생에서 적절한 강도특성을 발현하고 있다. 본 연구의 결과를 통해 차후 바텀애시의 활용방법이 확대되고, 바텀애시를 잔골재로 활용함으로서 부가가치 상승에 기여할 것으로 예상된다.

시멘트 압출패널의 규사분말 대체재로서 폐콘크리트 미립분의 활용

김진만,김기석,라정민,최덕진,Kim, Jin-Man,Kim, Kee-Seok,La, Jung-Min,Choi, Duck-Jin 한국건설순환자원학회 2011 한국건설순환자원학회지 Vol.6 No.1

To make recycling aggregate, quantity of fine particles increase due to multi-crushing. Though this particles were mixed with recycling aggregate, those have to be disparted from aggregate in the high quality recycling aggregate, because of the cause of low quality. Considering reactivity, fine particles is better than coarse one. Therefore, it needs to develop suitable usage. We try to make cement extruding material by using the fine particles from concrete recycling, as a silicious replacement. Test results are as follows ; 1) Waste concrete powder has major ingredients such as $SiO_2$ and CaO, its density is $2.45g/cm^3$ being similar to silica powder, its diameter is range 13 to $141{\mu}m$. 2) Considering to strength properties according to particle size, specimen was made using small particles is higher strength than large one. 3) Despite of exception in the autoclaved curing, when the replacement of waste fine particle increase, strength of extruding panel shows almost same level. 순환골재를 제조하기 위해서는 반복적으로 파쇄해야 하기 때문에 미립분의 발생량이 증가하게 된다. 기존에는 이 분말을 순환골재에 포함하여 배출하였으나, 고품질 순환골재의 경우에는 골재의 품질을 저하시키게 되므로 별도로 분리하여야 한다. 또한, 폐콘크리트의 완전한 리사이클링 이라는 측면에서도 미립분의 용도를 개발하는 것은 매우 중요하다. 본 연구에서는 고압으로 압출하고 고온고압 양생에 의해 산화칼슘과 산화규소의 수화반응을 유도하여 강도를 발현하는 시멘트 압출패널을 대상으로 규사분말의 대체재로서 폐콘크리트 분말을 적용하는 연구를 수행하였으며, 그 결과는 다음과 같다. 1) 폐콘크리트 분말은 $SiO_2$, CaO를 주성분으로 하고 환경에 유해한 성분을 포함하고 있지 않으며, 밀도는 콘크리트보다 약간 높은 $2.45g/cm^3$, 분말의 평균 입경은 $13{\sim}141{\mu}m$로 배출되는 장소에 따라서 다소 차이가 있는 것으로 나타났다. 2) 폐콘크리트 분말을 배출되는 장소에 따라 강도를 검토한 결과 분말의 평균사이즈가 작은 경우의 강도가 높게 나타나고 있어 분말의 크기가 강도에 미치는 주요 요인인 것을 확인하였다. 3) 평균크기 $13{\mu}m$로 크기가 가장 작은 백필터 집진분말을 이용하여 규사분말의 50~100%를 대체하여 실험한 결과 대체율의 증가에 따라 강도가 저하하고 있으나 KS 기준을 만족하는 경우도 있어 폐콘크리트 미립분을 수열반응에 의해 제조하는 시멘트 압출패널의 실리카질 재료로 활용하는 것이 가능함을 확인하였다.

옻에 의한 전신성 접촉피부염의 전신광화학요법

김태흥(T. H. Kim),최덕진(D. J. Choi),윤태진(T. J. Yoon) 대한피부과학회 2002 大韓皮膚科學會誌 Vol.40 No.5

N/A Background : Tha clinical symptoms of the acuie stage systemic contact dermatitis by rhus arc not easily improved by ordinary treatment including systemic steroids. Object : The, purpose of this Study was to evaluate the effect of systemic photochemotherapy on the systemic contact dermacius rhus. Method : Eleven patients of system contact dermatitis by rhus were divided into two creatment groups. One was treated by systemic photochamothelapy with systemic steroids and the other by systemic steroids only. The mean duration of symptomatic improvement and the mean dose of systemic steroids were calculated after termination of the treatment. Results : The mean amount of steroids and mean duration of symptomatic improvement were significantly decreased in patients who received systemic photochemotherapy. Conclusion : Systemic photochemotherapy is a alternative treatment for patients who can not tolerate high does steroids, and a combat of systemic photoclimotherapy and low dos steroids is very effective in controlling acute stag. symptoms of systemic contact dermatitis with much lowered dose of systemic steroids.