정책결정과 주민참여에 대한 연구

고종국 서강대학교 공공정책대학원 2005 국내석사

대화체 기계번역을 위한 플렌-기반 어휘적 애매성 해소

고종국 포항공과대학교 1996 국내석사

東北亞 據點港灣으로서의 問題點分析에 관한 硏究 :

고종국 한국해양대학교 대학원 2004 국내석사

This paper investigates about the corresponding device to the main factor of the problems, which our port will face when successfully being North-East Asia's central port. To achieve the main topic of this essay; survey was carried, verified a set experimental hypothesis by grasping the variety of relationships with human resource and applied the Multiple Regression Analysis to diagnose our port's problem according to North-East Asia's logistics environment change. Summarizing the result of the experiment, it come out as following. Firstly, concerning if the developing of Busan new port or Kwangyang port could become the North-East Asia's central port, the professionals of logistic pointed out that they have a high possibility of not becoming the central port and a low reliability. Especially for Kwangyang port, the recognition turns out to be insufficient for becoming a central port in North-East Asia. Abstracted these uncertainty and low reliability are mainly caused by; the decreasing of transshipment cargo, the growth possibilities of the competition ports surrounding North-East Asia, and the unsatisfactory service-facilities of our main port. Amongst these three factors, the most threatening factor for our port to aim at becoming the central port in North-East Asia is the competition port's (Shanghai, Qingdao, Kobe, etc) growth probability. Among the competition ports, the most threatening factor is Shanghai China port's variable volition of growth. The construction of a large scale of terminal, [Development plan of deep-draft container terminal at Yangsan], for 52 berth at a depth of 15m in Dansan Islands at Daeso Yangsan which is located at a marine of 30Km Eastwards from Shanghai harbor, is in process. In a definite way, Shanghai harbor is the most threatening barrier for our port to become the central harbor in North-East Asia because the construction of total length of 1,600m for 1st step construction of five berth is in process till 2005 and if in 2010, the construction is complete for 54 berth, it will furnish handling capacity of 20million TEU, thus making it the main intimidating factor for our port. Subsequently, it is possessed real grounds of port at Shanghai, Qingdao, Kobe, etc which our Busan port or Kwangyang port have no possession. The focus of the future harbor is not only loading/discharging function, but also substantially able to create a valuable construction of real grounds of port is urgent and an efficient and flexible management. Therefore, the construction of real grounds of port is urgent for Busan new port or Kwangyang port to become the central port in North-East Asia. Moreover, for competing country's central logistics, port development's accelerate and hub of logistics is in propulsion. Thus, for Japan's super central port policy and logistics industry's activation, special economic zone system's introduction and through Taiwan's Kaohsiung port main plan of development of 2020, developing additional 16 container berth and ensure total of 30million TEU handling capacity is a propulsion plan. Consequently, these competing country's central logistics propulsion plan is recognized as the main factor which causes a great amount of threat to our port to intend to become the central port in North-East Asia. Secondly, decreasing trend of transshipment cargo is the second main factor which is recognized as another intimidating factor to our port to become the central port in North-East Asia. After the year 2000, transshipment cargo mean was around 30% yearly. However, in 2003 Busan port, there were the effects of typhoon and serious disturbance of logistics but comparison of last year not even 8.8% and Kwangyang port is at around 9.7%. transshipment cargo is further increasing and these Trend of North-East Asia for the quantity of goods transported causes a problem to our port which has only a few domestic cargo and thus, it is a serious factor for our port to develop into the central port in North-East Asia. Thirdly, North-East Asia competing country's of central logistics competitions accelerate and unable to correspond to the logistic environmental changes are the fact that our port has lack of confrontation. Not only today's port facilities and services are inadequate compared to the competing harbors, but also the primary factor of failure of the developing plan is expected. Thus, for Busan new port, if consider the negotiation date for the southern ports 11 berth, it will be hard to complete within the planning date. Also, real road of Busan port and real grounds of port construction propulsion is expected to have a miscarriage in completing it within the expecting date. Consequently, according to option and concentration, focusing on the resources is considerate for our port to become the central port. we can sufficiently dispose to the threatening competing ports and resuscitate to become the central port. Fourthly, as the above statements, amongst the three main environment factors, the first reason why our port has an uncertainty of becoming the central port in North-East Asia is because our harbor facilities and services has a low quality of level and next is decreasing trend of transshipment cargo. Also, it appeared that North-East Asia competing ports growth possibility has no effect on the uncertainty. Moreover, it is also the fact that our port facility and service level is insufficient which effects to lower the reliability for our port to become the central port and next is decreasing trend of transshipment cargo and North-East Asia competing ports growth possibility is appeared that it is effecting on lowering the reliability. According to these results, if we strengthen the competitiveness of our harbor with no miscarriage in logistics environment of North-East Asia, we can sufficiently dispose to the threatening competing ports and resuscitate to become the central port. Lastly, the three main factors all effect the insufficient recognition of Kwangyang port. Needless to say this is because of the propulsion that is in process, which is to develop berth and rear grounds with no miscarriage and by connecting with Busan new port, port operating system is needed.

Interfacial Engineering of Conjugated Polymers by Nanoconfinement for Optoelectronic Applications

고종국 서울대학교 대학원 2018 국내박사

The conjugated polymers have gained enormous attention as next-generation semiconducting materials because of their tunable electrical and optical properties combined with plastic properties such as toughness, plasticity and elasticity. Therefore, various applications such as OTFT, OLED, OPV, photodetector, and sensor etc., were considered and widely studied. Among various application using conjugated polymers, OLED has already been commercialized and is about to become an alternative displays and light sources. Cheap, flexible and cost-effective solar cells by conjugated polymers are particularly prominent application to solve energy related problems. Less than 0.1 % of power conversion efficiencies in 1980s have been increased up to more than 12 % recently. There were several breakthroughs by developing of new process methods and new materials. New conjugated polymers such as low bandgap polymers which more efficiently absorb photons and transfer electrons were synthesized. In addition, bulk heterojunction was discovered which provide large interfaces for charge separation and pathways for efficient charge transfer. However, chemical instability as well as metastable nanostructures by bulk heterojunction which are intrinsic drawbacks of organic materials have made difficult for OPVs to be commercialized. Therefore, it required another breakthrough approach which can enhance both device performance and stability at the same time. Nanoconfinement could be effective approach to realize both efficient and stable optoelectronic devices. Nano-confined polymers have shown novel structural and dynamical properties which were not obtainable using conventional methods. Controlling the structural properties and dynamics by nanoconfinements could give us new approach to solve the problems. In this study, systematic studies of nanoconfinement effect on structural properties and dynamics of conjugated polymers will be shown. We applied nanoconfinements effects on organic solar cells to realize efficient and stable device performance based on those systematic studies. In the first Chapter, fundamentals on conjugated polymers, organic solar cells and nanoconfinement effects will be described to address the importance and effectiveness of our approach. In the second Chapter, nanoconfinement effects on crystalline structure of conjugated polymer were studied. Based on structural studies, organic semiconductor thin films with dramatically enhanced charge mobility along with superior oxidization resistivity were realized by exploiting nanoconfinement followed by solution-based doping. First, easy and mass-producible methods to fabricate nanostructures of conjugated polymers will be introduced. Parameters of conjugated polymer nanostructures such as size, geometry and composing materials were easily controlled using newly developed patterning methods. Based on those newly developed patterning methods, systematic studies on the effect of nanoconfinement on structural properties of conjugated polymers were conducted. We fabricated nanopillars, nanoholes, and nanocones of conducting polymer with different chemical structure, dimension, and crystallinity based on patterning with soft PFPE templates. GIWAXS measurements showed the changes in both chain orientation and crystallinity depending on the degree of confinement which are quite different from the bulk crystallinity of conducting polymers. More than 20 times higher population of crystallites having face-on orientation were obtained by nanoconfinement effect. In addition, they have shown more than two magnitudes higher charge mobility along vertical direction by increased crystallinity. Moreover, doping on those nanostructured films further increased the conductivity 400 ~ 500 times higher than that of bulk film. In the third chapter, two examples of nanoconfined geometry showing unusual dyanamics of molecules will be shown. Based on those dynamical studies, organic solar cells with increased device performance and stability were realized. First we used nanowire network structures in bulk heterojunction as confinement geometry. we demonstrate a novel strategy for the stabilization of nanomorphology of organic solar cells by inducing polymeric nanowire network structures. The physically interconnected network structures form robust electron donor domains and impose confinement which suppresses the aggregation of the electron acceptor, [6,6]-phenyl-C61-butylric acid methyl ester (PCBM). Organic solar cells having the nanowire network structures showed increased power conversion efficiencies and dramatically enhanced thermal stability compared to BHJ and non-network nanowire-based devices. Second geometry is quasi-OHJ fabricated by sequential process. For this study we used PTB7 and PCBM. PTB7 were first deposited on substrate. And on PTB7 films, PCBM dissolved in DCM/DIM were deposited by spin-casting. During the spin-coating process, some PCBM were diffused into PTB7 amorphorous phases forming interdigited structures at the interfaces. Because of such as interdigited structures, confined structures at the interfaces, they showed significantly enhanced device stabilities. Compared to device performance of BHJ were deteriorated within initial 10 hours, other nanoconfined devices showed stabilized performance more than 1,000 hours. In the last chapter, effect of nanoconfinement on both structural properties and dynamics was applied to organic solar cell to realize efficient and stable organic solar cells. P-type materials PCBM and PNDIT were deposited on top of 70 nm sized P3HT nanopillars to fabricate ordered heterojunction geometry. Strong face-on orientation with high crystallinity in P3HT nanopillars will provide effective pathways for hole transport along vertical direction. Their interdiffusion between donor and acceptor molecules were effectively controlled by changing annealing conditions. In addition, their dynamics were quantitatively analyzed by in-situ GISAXS experiments. They have shown different rate of diffusion and stabilized degree of diffusion. We could obtain highly enhanced device performance by decreasing domains sizes from the controlled interdiffusion of donor and acceptor molecules. Moreover, they endured harsh thermal conditions up to 200 ℃ for 4 hours by the stabilized interdiffusion due to nanoconfinement.