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한재석,심순보 충북대학교 건설기술연구소 1986 建設技術論文集 Vol.5 No.1
A forecasting model for reservoir water level of the Dae-Cheong multipurpose dam during flood season was developed by using discrete dynamic transfer function and linear stochastic model. The purpose of this forecasting model development is to forecast the reservoir water level of the Dae-Cheong multipurpose dam. The formulation of this model was derived from the following physical phenomena: reservoir water level, inflow into reservoir, outflow at the gate and the hydrological characteristics. The model was calibrated for the flood period of 1981 and 1983, and data for the 1984 flood period w ere analyzed. In particular, the forecast error for the peak flood stage was only about 18㎝, and the model predicted the exact time of the occurrence of the peak point and the criterion of efficiency. R²_m, was 0.93. These reservoir water level prediction results were found to be superior to the current system of deterministic methods.
Regrowing Synovial Chondromatosis in a Cervical Facet Joint with Radiculopathy
한재석,이승훈,김은상,어환 대한척추신경외과학회 2012 Neurospine Vol.9 No.3
Synovial chondromatosis (SC) in the spine is rare. There are few reports of associated cervical radiculopathy and there has not been a case reported of regrowing cervical SC. Here we report a 21-year-old man with a SC of a cervical facet joint that extended into the intervertebral foramen and compressed the cervical nerve root. The same symptom developed three years following the first operation. Computed tomography (CT) scans and Magnetic resonance imaging (MRI) showed multiple calcified nodules anterior to the right facet joint of C6-7 that extended into the intervertebral foramen. A mass removal was performed just as in the previous operation with a subtotal facetectomy. When vertebral SC is suspected, complete removal involving the bone and synovium should be considered as the standard treatment option.
한재석,손재상,조상은,조용철,김종민,우현석,김연정,INAMDARAKBAR IBRAHIM,김형상,임현식 한국물리학회 2015 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.67 No.3
Multi-wall carbon nanotube/polyaniline (CNT/PANI) nanocomposite thin films for electrochemical electrode applications are synthesized on flexible graphene-coated indium-tin-oxide (ITO) substrates by using a drop-casting technique. Graphene serves as an adhesion layer between the CNT/PANI nanocomposite film and the flexible ITO substrate. A nanoscale vermicular morphology of PANI films containing well-dispersed CNTs is formed on the surface of graphene. The electrochemical characteristics of the nanocomposite films are investigated in a 0.5-M LiClO4 + PC electrolyte. The electrical conduction of the CNT/PANI/graphene/ITO film is considerably superior to that of a PANI/ITO film. The cyclic voltammogram measurements indicate that the specific capacitance of the CNT/PANI film is 134 F/g which is 11% higher than that (120 F/g) of the pure PANI film. Most importantly, the nominal capacitance loss of the PANI/CNT film (1.2%) is significantly improved relative to that of the pure PANI film (18.1%) after 100 charge-discharge cycles. We attribute the considerably improved capacity retention of the flexible CNT/PANI electrode to the graphene adhesion layer.
한재석,심순보 충북대학교 건설기술연구소 1988 建設技術論文集 Vol.6 No.2
A new approach method for the computation of demand water in river basin based on the node-reach concepts was attempted. This method was formulated by using the linear regression method to interpolate the parameters for the calculation of demand water during the applied unit period, and the Seomjin river basin was selected far the case study. The results in this study were found to be superior to the existing methods, therefore, it would be provide the basis data far the optimal allocation of the water resources and the planning of low flow management system.
Electrical Properties of N2- and H2-annealed Bulk MoS2/Metal Junctions
한재석,이종하,이종경,우현석,김종민,조용철,조상은,김형배,김형상,파와르,INAMDARAKBAR IBRAHIM,정웅,임현식 한국물리학회 2015 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.67 No.7
We have investigated the electrical transport in symmetric metal-bulk MoS2-metal junction devices as a function of the temperature in the bias-voltage range between −0.5 V and +0.5 V. Three different types of MoS2 were: pristine, N2-annealed and H2-annealed MoS2. Metal/MoS2 contacts were formed by evaporating various metals (Al, Au, Ti and Ni) with different work functions on the surface of MoS2. The two-terminal current-voltage characteristics were measured in the temperature range from 100 K to 300 K, and the thermal activation energies at the metal-bulk MoS2 interface were also estimated. The Au/MoS2 and Ni/MoS2 junctions exhibit Ohmic behavior (linear current-voltage characteristics) over the entire temperature range, regardless of whether N2- or H2-annealing was applied. Al/N2 annealed MoS2 and Ti/N2 annealed MoS2 junction devices exhibited Schottky behavior (nonlinear current-voltage characteristics) as the temperature was decreased below 150 K. We attribute the different electrical transport properties that were observed to the dissimilar natures of the junction interfaces and to the annealing-induced modification in the Fermi level of MoS2.
도시 하천의 수자원 최적관리를 위한 다차원 수질모형의 개발(2) : 하천 수질시스템 전산프로그램 개발
한재석,심순보 충북대학교 건설기술연구소 1989 建設技術論文集 Vol.7 No.2
The purpose of this paper is to study a development of stream water quality systems and computer programs in succession to $quot;A Development of Multi-Dimensional Urban Stream Water Quality Model for an Optimal Water Resources Management (I) : A Development of Multi-Dimensional Stream Water Quality Model$quot;. For a development of stream water quality systems, firstly, stability and sensitivity analyses are carried out. The results of this study seems to be satisfactory for the reliability of stream water quality model with respect to the numerical scheme and the variations of water quality parameters. Secondly, the stream water quality systems for the effective management of the model in real operations are built by the decomposition theory. Lastly, the algorithms of computer programs are developed by based on the water quality systems and water quality modeling. The computer systems are developed by one main program and eighteen sub-programs, and the I/O systems are developed for the effective operations of computer systems.