지속가능한 학교시설을 위한 실내환경 계획 요소에 관한 연구

신동식,이종국,Shin, Dong-Sik,Lee, Jong-Kuk 한국교육녹색환경연구원 2011 교육·녹색환경연구 Vol.10 No.1

Global environment is getting deteriorated at an alarming rate. Eco-school could be one of the effective solutions to project our environment and a good sample of architecture to economize in total energies, resources and greenhouse gases. In case of our country, the study of eco-school planning is not sufficient compared with other countries, so this paper would be a good study on the indoor environment of the classroom by surveying their opinions and ideas from the group of users in school facility. The result of this study shows that the proper installation of building equipment and nature ventilation system is necessary to provide delightful environment for the students and to save the energy. To ensure that we have adequate saving and protection it is necessary to change the existing appraisal standard.

515nm 피코초 레이저를 이용한 구리 어블레이션 공정의 최대 가공율에 대한 이론적 분석

신동식,조용권,손현기,서정,Shin, Dongsig,Cho, Yongkwon,Sohn, Hyonkee,Suh, Jeong 한국레이저가공학회 2013 한국레이저가공학회지 Vol.16 No.2

Picosecond lasers are a very effective tool for micromachining metals, especially when high accuracy, high surface roughness and no heat affected zone are required. However, low productivity has been a limit to broadening the spectrum of their industrial applications. Recently it was reported that in the micromachining of copper with a 1064nm picosecond laser, there exist the optimal pulse energy and repetition rate to achieve the maximum volume ablation rate. In this paper, we used a 515nm picosecond laser, which is more efficient for micromachining copper in terms of laser energy absorption, to obtain its optimal pulse energy and repetition rate. Theoretical analysis based on the experimental data on copper ablation showed that using a 515nm picosecond laser instead of a 1064nm picosecond laser is more favorable in that the calculated threshold fluence is 75% lower and optical penetration depth is 50% deeper.

Development of Debris-free Process using Erasable Ink for Polymer Ablation

신동식,이제훈,서정,김도훈,Shin, D.S.,Lee, J.H.,Suh, J.,Kim, T.H. Korean Society of Laser Processing 2005 한국레이저가공학회지 Vol.8 No.2

The excimer laser ablation of a polymer occurs by the excitation of chemical bonds to energy levels that are above the dissociation energy. In this process, however, fragmented debris is finally ejected explosively by the scission of bonds and accumulates on the material surface. In the present work, a process for eliminating surface debris contamination generated by the laser ablation of a polymer is developed. The proposed approach for removing surface debris utilizes an erasable ink pasted on a polymide. The ink pasted polyimide is ablated by KrF excimer laser. The surface debris ejected from the polyimide is then combined with the ink layer on the polymer. Finally, both the surface debris and the ink layer are removed using adhesive tape or alcohol solvent. The results suggest that the erasable ink method is a simple, low cost, and extremely effective debris eliminating process.

피코초 레이저를 이용한 금속의 미세가공 특성

신동식(D. S. Shin),이제훈(J. H. Lee),서정(J. Suh),노지환(J. W. Noh),정용운(Y. W. Chung),김재구(J. G. Kim) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6

In contrast to dielectric materials, metals are characterized by a high density of quasi-free electrons causing strong absorption of laser light from the beginning of the ultrashort laser pulse without the need of nonlinear absorption effects like multiphoton absorption. The transfer of energy from the electronic system causing strong absorption of laser light to the lattice needs relaxation times of the order of some picoseconds. Under the above theoretical background, nickel was chiefly ablated using femtosecond, picosecond and nanosecond laser. As a result, nickel ablation by picosecond laser and femtosecond laser, which are called ultrashort laser, has similar machinability because of relaxation time of metals, whereas nanosecond Nd:YAG laser has lower absorption, higher thermalization effect in comparison with ultrashort laser.

<봄날은 간다>를 통해 본 플롯과 캐릭터의 관계

신동식(Dong-Sik Shin) 미디어스토리텔링학회 2015 미디어스토리텔링 Vol.2 No.-

<봄날은 간다>는 2001년에 제작된 영화로 14년이라는 시간이 지났지만 당시 다른 나라와의 공동투자로 만들어진 영화로 안정적인 제작환경이 영화에 줬던 영향, 지금은 찾아보기 힘든 한국형 멜로영화의 새로운 제작을 위해 분석해보기 좋은 영화이다. 다른 나라의 멜로 영화와의 분석을 통해 한국형 멜로의 특징을 파악하고 설문조사를 통한 비교분석을 통해 영화가 흥행하는 원인에 대해 생각해보려 한다.

호텔경영계약시 자본참여, 경쟁제한, 상표권, 분쟁해결 및 계약종료에 관한 연구

신동식(Shin, Dong-Shik) 국제관광산업학회 2010 국제관광산업연구 Vol.2 No.3

This study was designed to examine the analytical comparisons, the point of issues and reform measures of major contents of the management contracts of 8 domestic hotels which have introduced the internationally operating chain hotel brand of management companies, through which to furnish the upright information on negotiation of management contract for domestic hotel owners. The study was carried out by the methods of documentary and specialists group interviewing ones at the same time. It focuses on review of the management contract letters of 8 domestic hotels for fact-findings by the comparative study method. It was chosen a method of interviewing of the related specialists group as a study of management contract letter and relating questionnaires were given to 12 hotel management-related specialists for balancing the objectivity of research materials in which only the common opinions were accepted. The components of questionnaires on concerning specialists were categorized as general notions on hotel management contract, operator loan and equity contributions, restrictive covenants, trademark right, dispute settlement procedures, and condition for contract termination. As a result of the interviewing survey on the hotel management-related specialists, it was proposed the improvements as follows. It is beneficial for the owner to introduce operator equity participation as much as possible under the condition the management right is not to be violated, and to introduce financing also as the owner needs more funds in the beginning of hotel operation. The owner is to set the restrictive area provisions specifically by real or geographical distance in order not the business area of owner to be encroached by similar properties of the management company. Regarding the rights of trademark, the owner should negotiate with the operator that additional management fees are not be paid, if possible, when another revenues are created thru expansion of outside catering business, and the consumption inventories are to be used up for the hotel operation until they exhausted regardless of the termination of the management contract. Concerning dispute settlement procedures, the both parties need to clarify prior dispute items and ranges, and to establish and solve the problems thru the dispute settlement committee before going to the litigation. Relating to the termination of the contract provision, if the actual revenue is less than the budget, the option to terminate by the owner should be stipulated in the operator performance provisions. Generally, this study suggests that the hotel management contract should be balanced to both the owner and operator.

Two-Port Time Domain Reflectometry 방법을 이용한 XLPE 전력용 케이블의 전파 특성 측정

신동식(Dong Sik Shin),조현동(Hyeon Dong Cho),박위상(Wee Sang Park),이상화(Sang-Hwa Yi),선종호(Jong-Ho Sun) 한국전자파학회 2013 한국전자파학회논문지 Vol.24 No.3

본 논문에서는 전력 케이블의 전파상수를 추출하는 2-port time-domain reflectometry(TDR) 방법을 제안한다. 케이블을 투과하는 펄스 신호를 시간 영역에서 측정하고 주파수 영역에서 분석하여 전파상수를 추출하였다. 22.9 kV 325 mm² XLPE 케이블의 전파상수를 2.14 GHz까지 추출하고 network analyzer 로 측정한 케이블의 S21을 비교하여 2-port TDR 방법의 타당성을 입증하였다. 그 결과, 기존의 TDR 방법보다 측정 가능한 상한 주파수가 증가하고, 고주파수에서 오차가 줄어드는 것을 확인하였다. This paper presents a two-port time-domain reflectometry(TDR) measurement technique for extracting the complex propagation constant of a cross-linked polyethylene(XLPE) cable. For the extraction, a short pulse transmitted through the cable is measured in the time domain and analyzed in the frequency domain. The propagation constant of a 22.9 kV XLPE cable with a conductor area of 325 mm² is extracted up to a frequency of approximately 2.14 GHz. The S21 measured using a network analyzer and the two-port TDR technique are compared for verification. As a result compared with previous TDR method, the upper possible frequency limit for extracting the propagation constant increases and the measurement error decreases.

지역축제 체험 가치가 지역 브랜드 자산 및 지역 애호도에 미치는 영향에 관한 연구

신동식(Shin, Dong Shik) 한국서비스경영학회 2013 서비스경영학회지 Vol.14 No.2

City governments are actively making and implementing the city marketing strategy focused on differentiated competitive factors as the policy for regional development to secure the advantage over competition. Under this situation, the festival has become a city marketing means utilized most to respond to the actual demand such as enhancement of competitiveness of each local governments and revitalization of economy. The purposes of this study are to investigate the casual relationship among Experience value of Local Festival, City Brand Equity and Regional Loyalty. Data has been collected from 208 respondents for this study using a questionnaire method. The survey was done for 5 days from May, 2012. The positive analysis was done with SPSS 19.0 and AMOS 19.0 using the reliability analysis, factor analysis, correlation analysis, path analysis and so on.

호텔경영계약에 관한 바이블 - 아이스터의 “The Negotiation and Administration of Hotel and Restaurant Management Contracts” : 호텔경영계약에 관한 바이블

신동식(Shin Dongshik) 국제관광산업학회 2008 국제관광산업연구 Vol.1 No.1

폴리머의 어블레이션 시 소거성 잉크를 이용한 잔유물 제거공정 개발

신동식(D. S. Shin),이제훈(J. H. Lee),서정(J. Suh),김도훈(T. H. Kim) 한국레이저가공학회 2005 한국레이저가공학회지 Vol.8 No.2

  The excimer laser ablation of a polymer occurs by the excitation of chemical bonds to energy levels that are above the dissociation energy. In this process, however, fragmented debris is finally ejected explosively by the scission of bonds and accumulates on the material surface. In the present work, a process for eliminating surface debris contamination generated by the laser ablation of a polymer is developed. The proposed approach for removing surface debris utilizes an erasable ink pasted on a polyimide. The ink pasted polyimide is ablated by a KrF excimer laser. The surface debris ejected from the polyimide is then combined with the ink layer on the polymer. Finally, both the surface debris and the ink layer are removed using adhesive tape or alcohol solvent. The results suggest that the erasable ink method is a simple, low cost, and extremely effective debris eliminating process.