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Oh, I.,Jo, J.,Park, J.,Lee, J.,Shin, H.,Yoo, J.W. Elsevier 2016 Current Applied Physics Vol.16 No.11
<P>Glassy carbon can be used in a variety of harsh environments because it exhibits low electrical resistance, high thermal stability, chemically impermeability and hardness. In this work, we studied the potential application of the pyrolized glassy carbon as a thermoelectric material by electron beam irradiation. Irradiation with electron beam energy of 1.4 MeV and 0.2 MeV triggered local crystallization of glassy carbon, which was determined by a Raman spectroscopy. As the irradiation time was increased, the number of sp(2) hybridized carbons was gradually increased while the number of disordered carbons was decreased. This electron beam induced local crystallization caused a synergetic effect on a thermoelectric power factor of the studied glassy carbon films. Although the electrical conductivity was decreased by the e-beam irradiation, the Seebeck coefficient was significantly enhanced resulting in an improved power factor. The optimal power factor we obtained for the irradiated glassy carbon was similar to 50% higher than that of the non-irradiated sample. (C) 2016 Elsevier B.V. All rights reserved.</P>
오광식,박외정 대구효성가톨릭대학교 1994 연구논문집 Vol.49 No.1
In regression diagnostics, a number of outlier measures based on various statistical tools have been discussed. These measures usually pay·attention to dectecting individual outlier. However, there exists a situation in which observations are multiple but not individual outliers or the other way about, The situation is revered to as a masking effect which means that the outlier of one observation is masked by the presence of another observation. The multiple outlier is often overlooked because it is much more difficult to detect than the individual outliers. We propose a new expression of John and Draper's outlier sum of square. The advantages from the theoretical point of view are that the expression is based not only on the multiple case but also on the single case, and that we can detect multiple outliers with the masking effect by investigating the difference between the multiple outliers and sum of the individual outliers. Furthermore we suggest a search method for multiple outliers after investigating some properties of the new expression. .
An Analysis of Shin keikō haiku and Dentō ha haiku from the Fundamental Informatics Perspective
Ohi, Nami World Association for Triple Helix and Future Stra 2013 Journal of Contemporary Eastern Asia Vol.12 No.2
This study aims to understand haiku phenomena from the viewpoint of communication, which emerges from reciprocal relationships among haiku poets, haiku societies, media on haiku, and other establishments relating to haiku. Such an analytic point of view, which tries to consider both the operation of each autonomous agent and that of the whole system consisted by the agents, is included in the realm of second-order cybernetics. The operation of a system cannot be reduced completely to a system's individual components, which is why such a viewpoint is required. Fundamental informatics, which is employed as a theoretical framework, and two haiku movements, which include shin keiko haiku ("new-trend" haiku) and dento ha haiku (Hototogisu-school haiku), forming an important part of modern haiku history, are the focus of this study. As a result, modern haiku history is considered to be an evolution of a haiku system, whose main incentive is an awareness of the production mechanism of haiku communication occurring through second-order observations in the system. This study also illuminates how haiku poets, haiku societies, and media covereage of haiku play roles in the evolution of the haiku system.
HIROSHI OHI,TOMOYA YOKOYAMA 한국펄프·종이공학회 2006 한국펄프종이학회 기타 간행물 Vol.- No.-
The pulp yield was improved by about 4.5-5% when polysulfide (PS) and anthraquinone (AQ) were added to the kraft cooking liquor (white liquor). The exchange of the black liquor with fresh white liquor further increased the yield. The highest pulp yield was obtained when the PS cooking liquor containing 70% of total active alkali (AA) and 100% of AQ was used from the beginning of the reaction and the black liquor was exchanged with fresh white liquor containing the residual 30% of AA just after temperature reached 135℃. There was a good correlation between kraft pulp yields of a hardwood species and the ratios of the amount of xylose to glucose (X/G ratio), liberated by an acid hydrolysis of the pulps. However, the correlation was dependent on raw material wood species. Therefore, it is required in advance to establish a correlation between the yields and X/G ratios for raw material wood species of a target pulp in order to estimate pulp yield using X/G ratio. The X/G ratios of relatively high yield pulps showed higher values than those expected from the correlation. In a mill trial, the superiority of the PS-AQ isothermal cooking (ITC) process over the kraft ITC process was confirmed by examining X/G ratio of pulps obtained. The pulp yield in the PS-AQ ITC process was estimated at about 57.0%. This yield is very high, which indicates that reaction conditions of the PS-AQ ITC process are optimal.
Full Dynamic Transmission Model and Threat Analysis of COVID-19
Abu Quwsar Ohi,M. F. Mridha,Md. Abdul Hamid,Muhammad Mostafa Monowar,Md. Ferdous Mridha,AKM Ashiquzzaman 한국디지털콘텐츠학회 2020 The Journal of Contents Computing Vol.2 No.1
No doubt, the COVID-19 outbreak exemplifies ongoing biothreats to humanity as a whole. This necessitates an emergency response towards its remedy because it is heightened in importance and compressed in the time frame. Consequently, significant research efforts have been noticed to tackle this pressing crisis. In this paper, we endeavor to formulate a mathematical model of the transmission of COVID-19. The dynamics of the disease are illustrated by a compartmental model that involves differential equations. The paper also exhibits a mathematical estimation of the future threats induced by COVID-19 universally, which is computed based on the immediate statistical data. We compute the current transmission rate of COVID-19 to be 0.0462, considering the current fertility and mortality of the world population. From the threat estimation, it is expected that the COVID-19 may eliminate around 30% of the current population by the next three years, and it may obliterate nearly 43% of the current population by the next five years.