동박과 접착력 향상을 위한 폴리이미드 합성 및 접착특성 평가

박재연(Jae Yun Park),박종현(Jong Hyun Park),박유민(Yu Min Park),박노균(No Kyun Park),김윤호(Yun Ho Kim),원종찬(Jong Chan Won) 한국고분자학회 2017 폴리머 Vol.41 No.5

차세대(5G) 디스플레이의 발전으로 인하여 데이터 전송량이 점차 증가하므로, 신호전송이 빠른 대역대인 고주파 대역을 사용한다. 신호전송을 위한 회로는 동박과 폴리이미드 필름으로 이뤄진 유연동박적층판(FCCL)이 사용되는데, 고주파는 표면으로 신호가 흐르므로 두 소재 사이의 계면 조도를 낮춰 경로를 최소화하여야 한다. 그러나 저조도 동박을 사용하면 동박과 폴리이미드 수지와의 접착 강도가 떨어지게 되므로 이러한 문제점을 보완해야 한다. 본 연구에서는 동박과 접착력 향상을 위해 다양한 폴리이미드 구조를 설계하고, 아민계 실란 기능기를 도입한 폴리아믹산을 합성하였다. 다양한 구조의 폴리아믹산은 pyromellitic dianhydride(PMDA), 3,3"4,4"-biphenyltetracarboxylicdianhydride(BPDA), 4,4"-(hexafluoroisopropylidene) diphthalic anhydride(6FDA)와 m-tolidine(mTB), 2,2"-bis(trifluoromethyl)-[1,1"-biphenyl]-4,4"-diamine(TFMB) 등의 조합으로 합성하여, 이를 동박에 코팅하고 이미드화하여 FCCL을 제조하였다. 접착력에 대한 특성은 다양한 폴리이미드 구조에 따른 박리 강도 시험과 분리된 계면에 대한 AFM, SEM, 접촉각 측정으로 상관관계를 비교 해석하여 확인하였다. Since the development in mobile display requires high data transmission speed, there is a growing need in the development of flexible copper clad laminate (FCCL) for flexible printed circuit board (FPCB) that has a high signal propagation at high frequency range. The circuit for signal transmission uses FCCL which is composed of copper foil and polyimide film. The surface roughness of copper foil has to be low to reduce the pathway of signal because the current flows near the surface at high frequency range. However, such low roughness of the copper foil results in poor adhesion to polyimide, which is a problem that should be addressed. In this study, the poly(amic acid)s (PAAs) having various structures were synthesized and the silane functional group was introduced as end group to investigate the enhancement in the adhesion with the copper metal. Various polyimide structures were synthesized with the combinations of pyromellitic dianhydride (PMDA), 4,4"-(hexafluoroisopropylidene) diphthalic anhydride (6FDA), 3-aminopropyltriethoxysilane (TEOS), 3,3",4,4"-biphenyltetracarboxylic dianhydride (BPDA), m-tolidine (mTB) and 2,2"-bis(trifluoromethyl) biphenyl-4,4"-diamine (TFDB). The synthesized PAAs were casted on the copper foil and were imidized for the fabrication of polyimide for FCCL. The adhesion strength between the polyimide and the copper foil was investigated by peel strength test and interfacial characteristics was investigated with AFM, SEM, FTIR and contact angle measurement.

문화유산을 활용한 테마파크형박물관에 관한 연구

박소라(Park, So La),우성호(Woo, Sung Ho) 한국실내디자인학회 2013 한국실내디자인학회논문집 Vol.22 No.6

The number of visitors to historic sites and museums in Korea has been on a rapid decrease and in order to search for creative ways to work on the problem, the study proposed a theme park-typed museum with cultural heritage applied and reviewed spatial strategies for such theme park-typed museums. Applied methods of research of this study are as follows. First, in order to understand definitions and current situations of cultural heritage use and theme park-typed museums, the study went thoroughly over all sorts of literature and reports as well as findings of advance researches on how to make a use of cultural heritage. Based on the results of the investigations, the study determined characteristics of the theme park-typed museums with cultural heritage applied which the study was proposing and the characteristics were categorized by type. Considering those characteristics and types gained in the study, the study looked for cultural heritage-based theme parks and museums in the world which were good enough to be used as research subjects in the study from the aspects of profitability and level of awareness. The study examined those theme parks and museums in the world and in the end, it found out ways to adopt the findings to the situations in Korea and discussed expecting effects as well. As to the characteristics of the theme park-typed museums with cultural heritage applied, the study divided those characteristics into mutual cooperation, location, communicability, authenticity, maintainability, education, durability, narrativity, undailiness, interactivity and leisure. The types were categorized into ride, environment direction, cartoon character and souvenir by attraction pattern. When cultural heritage is used actively, it would improve competitiveness of historic cultural sites and museums in return, making people realize the iterative structure of excavation, conservation, maintenance and use of cultural heritage. That would create many kinds of added values, re-discovering culture of the country. At the same time, it would also create a new value of culture as well. Now, it is important for us to do harder with researches on how to evolve museums and exhibition spaces. Considering that, the study is believed to make a contribution to revival of historic sites and museums in Korea but also establishment of scientific strategies.

The effect and mechanism of pirfenidone in the genetic progressive glomerulosclerosis animal model, FGS/KIST mouse

박호선 ( Park Ho Seon ),박용훈 ( Park Yong Hun ),조인호 ( Jo In Ho ),이철호 ( Lee Cheol Ho ),현병화 ( Hyeon Byeong Hwa ),김용진 ( Kim Yong Jin ),( Li Hua Bao ),( Solomon B. Margolin ) 대한신장학회 2002 춘계학술대회 초록집 Vol.21 No.1

수두-대상포진 바이러스의 재활성에 의해 유발되는 다양한 임상질환

박호선 ( Ho Sun Park ) 영남대학교 의과대학 2016 Yeungnam University Journal of Medicine Vol.33 No.1

The two distinctive clinical features of varicella-zoster virus (VZV) are varicella (chickenpox) by primary infection and zoster (singles) by the reactivation of latent infection. In addition to the two typical clinical symptoms mentioned above, diverse clinical manifestations have been reported as a result of VZV reactivation, including chronic radicular pain without rash, visual loss, facial palsy, dysphagia, sore throat, odynophagia, otalgia, hearing loss, dizziness, headache, hemiplegia, etc. Most of these symptoms are derived from neuropathy and vasculopathy of affected nerves and arteries. Diagnosis of VZV disease can be difficult if there is no appearance of a skin rash during development of atypical symptoms. In addition to natural infection, vaccination and anti-viral agent treatment have influenced the changes of epidemics and clinical presentations of varicella and zoster. In this article, diverse clinical manifestations caused by VZV reactivation, particular without skin rash, are reviewed.

공무원들의 인식에 나타난 경관자원 특성 분석 연구

박선명(Park Sun-Myung),박선경(Park Sun-Kyung),김주현(Kim Joo-Hyun),김종하(Kim Jong-Ha),이정호(Lee Jung-Ho),최무혁(Choi Moo-Hyuck) 대한건축학회 2010 대한건축학회논문집 Vol.26 No.11

In this study, to set up landscaping plans, characteristics of landscape were extracted based on opportunity and weaknesses factors of landscape after carrying out a questionnaire targeting officers in 23 cities and counties in Kyung-buk province and the findings are as following. First, in analyzing condition, component and value of landscape based on opportunity and weaknesses factors, for opportunity factors, it was found that the condition of landscape was quantitatively great, the component of landscape was industrially great and the value of landscape was great in possibility of development. Also, for weaknesses factors, the 'quality' was superior in its condition, the industry was superior in its 'component' and the shortage of artificial resources was superior in its 'value'. Secondly, in the relation between factors consisting opportunity and weaknesses resources, firstly, it was found that industry, city and nature are superior for opportunity factors, and culture, traffic and population are superior for weaknesses factors. Next, in the relation between component and condition, 'qualitatively superior industry' and 'quantitatively superior industry' had the highest frequencies in opportunity factors and 'qualitatively outstanding city' and 'quantitatively preponderant industry' had the highest frequencies in weaknesses factors. Thirdly, in analyzing the importance of opportunity and weaknesses factors, for opportunity factors, qualitatively superior resource was a priority in the importance of condition and for weaknesses factors, it was qualitatively little greater than the quantity. In the importance of component, the industry was most superior in both of strength and weak points and in the importance of value, the shortage of artificial resources was a priority. Fourthly, in characteristics of landscape, internal characteristics were found stronger than external characteristics in each city and county. This means that there are more resources to strategize in landscape plans of individual city and county unit than other in metropolitan unit. Also, possibility of development, possession of complex resources and geographical adjoin were common points of their strategies and plans.

Shannon`s Entropy와 DEA를 결합한 효율성 분석 -세계 주요 20대 컨테이너항만을 대상으로-

박호 ( Ho Park ),김동진 ( Dong Jin Kim ),왕진 ( Jin Wang ) 한국생산성학회 2012 生産性論集 Vol.26 No.4

Data Envelopment Analysis (DEA) is a non-parametric method widely used for efficiency assessment of units having similar characteristics. However, DEA method has several different models and the result of each model is usually different making the choice of the specific model difficult in assessing the efficiency of units. One way of overcoming this difficulty is to combine the different DEA models into an integrated one with each model being weighted according to some weighing method. In this regard, we use Shannon`s Entorpy measure to combine the DEA models in such a way that all the efficiency results calculated from each model are considered in the integrated model to rank the units. For the study, the top 20 container ports in the world are compared for efficiency based on the traditional DEA method and the proposed method with Entropy.

포스트텐션 PSC 거더에 대한 2400 MPa급 강연선의 적용성 분석

박호(Ho Park),조재열(Jae-Yeol Cho),김지상(Jee-Sang Kim) 한국콘크리트학회 2012 콘크리트학회논문집 Vol.24 No.6

스테로이드의 국소 도포(Dermovate(R), Eumovate(R))에 의해 발생한 알레르기성 접촉 피부염

박용태 ( Park Yong Tae ),정유석 ( Jeong Yu Seog ),박태호 ( Park Tae Ho ),유재학 ( Yu Jae Hag ),김계정 ( Kim Gye Jeong ) 대한피부과학회 2003 대한피부과학회지 Vol.41 No.10

Allergic contact dermatitis to topical corticosteroids seems to occur more frequently than previously supposed. But it is not easily recognized because the allergic condition for which the steroid is mostly prescribed masks the sensitization. Moreover, corticosteroids evoke some anti-inflammatory effect, even in case of steroid hypersensitivity. A 40-year-old man visited our department for the evaluation of aggravated skin lesion of trunk. Previously he was treated with Dermovate?? and Eumovate?? ointment for chronic dermatitis. He was patch tested to the Korean standard series, with Dermovate?? and Eumovate?? ointment as is. Patch test showed positive reactions to both ointments.(Korean J Dermatol 2003;41(10) : 1385~1389)

흰쥐 내측 전정핵 세포의 막전도도와 시냅스 전달에 대한 Orphan Opioid의 작용

박현영 ( Hyun Young Park ),장혁 ( Hyuk Chang ),최정희 ( Jeong Hee Choi ),이문영 ( Moon Young Lee ),조광호 ( Kwang Ho Jo ),박병림 ( Byung Rim Park ),천상우 ( Sang Woo Chun ) 원광대학교 치의학연구소 2004 圓光齒醫學 Vol.13 No.2

버팀보지지 가시설구조물의 이산화 최적설계

박순응(Soon-Eung Park),박문호(Moon-Ho Park),김진규(Jin-Kyu Kim) 한국산업융합학회 2008 한국산업융합학회 논문집 Vol.11 No.3

This study is to develop the structure analysis and optimization algorithm of the strut supported temporary structure for underground constructions. Developed algorithm performs the analysis and the optimization of each strut, wale, and H pile of temporary structures separately. The design variables of nonlinear optimization consist of the cross-sections of temporary structures such as strut, wale, and H pile and the solution of the nonlinear programming is searched using for the method of successive unconstranint minimization technique. The weight of the structure is used for the object function of nonlinear programming. the constraints are derived from the specification of the temporary structures as compressive axial, bending, shear, composite stress and serviceability. The structural analysis is performed based on the elastoplastic beam theory. This developed program can be used to evaluate the applicability, convergence, and effectiveness of the temporary structures.