• Journal of Hydrogen and New Energy
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• v.10 no.4
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• pp.191-196
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• 1999

4-probe resistivity measurement technique was used to study hydrogen A-D(Absorption-Desorption)kinetics on Pd films(18 to 67nm thick) from 25 to $50^{\circ}C$, from 0 to 5 torr hydrogen pressure. Pd films were made on sapphire substrate by thermal evaporation technique under high vacuum at room temperature. Upto about 100 hydrogen A-D cyclings, no pulverization was observed, but film was detached partially from substrate. Forward reaction and backward reaction rate were analyzed separately. The activation energies of hydrogen A-D processes were obtained from the Arrhenius plot of the reaction rates. The activation energies of Pd films are not strongly dependent on the thickness of the film. But the activation energy of very thin film( l8nm thick) was smaller than the others.

• The Journal of the Korea Contents Association
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• v.16 no.4
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• pp.594-603
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• 2016

This study analyzed that introduction function and program how influence about quality of life local resident and development of region according to real development. Also, it suggested policy implications of area activation plan through complex development of railway station area. In research method, the factor and structure affecting area activation in complex development of railway station area analyzed positively using the PLS structural equation focused on citizen near station area. As a result of study, in regional economic vitalization, the factors of software(marketing support, transfer system support, plan and design support, complex development support, law institution improvement, etc) and the factors of hardware(traffic function, information exchange function, commercial business function, housing features, amenity function, etc) are represented to influence significantly and then, in quality of life of local resident, the factor of hardware analyzed to influence significantly, but the factor of software and network did not. In comparison, the factor of network is represented that it did not contributed in regional economic vitalization and quality of life of local resident. So, political supplementations are needed.

• Journal of the Korean Chemical Society
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• v.37 no.1
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• pp.3-9
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• 1993

Specific rates of solvolysis of 1-adamantyl fluoroformate in hydroxylic solvents have been measured by an electric conductivity method under various pressures. The activation parameters (${\Delta}V^{\neq}{_o},\;{\Delta}{\beta}^{\neq},\;{Delta}H^{\neq},\;{Delta}S^{\neq}$,/TEX>) and average pressure within the solvation-shell of activated complex (charge development) have been estimated from the rates. Also, the selectivities for the formation of solvolysis products in aqueous ethanol have been determined by response-calibrated GC. The values of ${\Delta}V^{\neq}{_o},\;and\;{\Delta}{\beta}^{\neq}$ are both negative, but ${Delta}H^{\neq}$ is positive and ${Delta}S^{\neq}$, is large negative. This behavior is discussed in terms of electrostriction of solvation. From these results, it could be postulated that the solvolysis of 1-adamantyl fluoroformate have two major reaction pathway.

• Journal of the Korean Chemical Society
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• v.40 no.5
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• pp.327-332
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• 1996

The rates of solvolylsis of methyl chloroformate, phenyl chloroformate and 1-adamantyl derivatives in binary solvent mixtures have been measured by conductometric method at various temperatures and pressures. The activation parameters were estimated from the rate constants. The activation volume (${\Delta}V_o^{\neq}$) and the activation entropy (${\Delta}S^{\neq}$) are both negative, but the activation enthalpy (${\Delta}H^{\neq}$) is positive. This behavior is discussed in terms of electrostriction of solvation. The reactivities of these reactions were also estimated from the correlation of the activation volumes with the activation entropies. From these results, it could be estimated that the solvolyses of 1-adamantyl fluoroformate (in aqueous TFE) and 1-adamantyl tosylate have pathway involving unimolecular reaction, while the reaction of methyl chloroformate, phenyl chloroformate and 1-adamantyl fluoroformate (in aqueous alcohol) proceed through a bimolecular reaction.

• Journal of the Korean GEO-environmental Society
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• v.9 no.3
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• pp.45-50
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• 2008

In this work, stainless steel mesh-supported activated carbons were prepared using phenolic resin and cellulose fiber. $ZnCl_2$ was used as a activation reagent in this work. $ZnCl_2$-chemical activation method has been proposed to produce highly porous activated carbons. The objectives of this work were to develop an optimal condition for manufacturing activated carbon assemblies screen from stainless steel mesh and phenolic resin. The iodine number was more increased over activation temperature of $450^{\circ}C$. Iodine number was 657 mg/g at activation temperature of $550^{\circ}C$, penolic resin concentration 20% and $ZnCl_2$ concentration 15%. Iodine number was 1359.4 mg/g when 10% cellulose added to these conditions.

• Journal of Digital Convergence
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• v.15 no.2
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• pp.519-525
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• 2017

The purpose of this study is to elaborate the factors and strategies to revitalize the policies of elderly-friendly care industry. The analysis was carried out using the method called DEMATEL. The analytical method is based on the DEMATEL technique. The purpose of this study is to clarify the complexity and unclear relationship between activation factors and factors that constitute the elderly friendly-care industry through the prioritization of policy strengthening. As the result of analysis, it was analyzed that the most intensive activation intensity was the highest total strength of meal service(22.095). Followed by health promotion facilities(19.97) and health care(17.726). The lowest factor is sport(15.896). Therefore, in order to improve and promote these factors, continuous policy measures should be sought that are closely related to facility care services, home care services, and preventive support services.

• The Journal of the Korea Contents Association
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• v.19 no.3
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• pp.236-251
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• 2019

The animation industry is an emerging and promising industry of the 21st century, characterized by a wide range of consumer segments, high market demand, and a long life cycle of products. The paper is aimed at examining the current situation of the animation industry of Korea, the U.S., China and Japan, analyzing the success factors and presenting measures for activation of problems in China's animation industry, and contributing to the promotion of China's animation policies in the future. To realize this goal, the study methods were adopted literature review by using Internet data, statistical data, reports, papers and academic journals which are related to the Chinese animation industry and presented methods for activation. The aviations as follows, firstly, it is suggested actively train creative men of animation for profession. Secondly, it is advised to encourage the creativity and originality of Chinese animation works through various ways. Thirdly, it is suggested to develop an industry chain of animation which is suitable for the market circumstances. Fourthly, it needs to expand its viewer and strengthen its reality in the form and content of animation works.

• Journal of the Korean Society for Library and Information Science
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• v.56 no.2
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• pp.157-177
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• 2022

This study, in relation to the decision to designate April 12 as the Library Day and the week from that day as the Library Week starting in 2023 in accordance with the amendment of the Libraries Act, suggests ways how the Library Week could be activation plan based on the analysis of the meaning and history of the Library Week which started in 1964 and cases of the use of library week at home and abroad. The uses of library week at home and abroad were analyzed and based on the implications drawn, suggestions for promoting the Library Week, were made in terms of three aspects - efficient methods for using the Library Week, changes in programs, diversification of promotional strategies. This paper suggests in order to promote the Library Week, various ways of running events, online and offline platforms, honorary ambassadors, unique commemorative events, national campaigns, archiving and all-year-round promotional channels and system are needed. This study could be used as a reference for promoting the Library Day and Library Week that will start in 2023.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.33 no.5
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• pp.761-773
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• 2023

This paper proposes a method to increase the power-analysis resistance of the neural network model's feedforward process by replacing the exponential-based activation function, used in the deep-learning field, with an approximated function especially at the multi-layer perceptron model. Due to its nature, the feedforward process of neural networks calculates secret weight and bias, which already trained, so it has risk of exposure of internal information by side-channel attacks. However, various functions are used as the activation function in neural network, so it's difficult to apply conventional side-channel countermeasure techniques, such as masking, to activation function(especially, to exponential-based activation functions). Therefore, this paper shows that even if an exponential-based activation function is replaced with approximated function of simple form, there is no fatal performance degradation of the model, and than suggests a power-analysis resistant feedforward neural network with exponential-based activation function, by masking approximated function and whole network.

• Investigative Magnetic Resonance Imaging
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• v.13 no.1
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• pp.47-53
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• 2009

Purpose : Although it's been known for half a century that unique structures have evolved in the cerebellum and they then became greatly enlarged in the human brain, the function of these structures still remains unknown. The purpose of this study was to assess cerebellar activation during motor, sensory, word generation, listening comprehension, and working memory tasks with using functional magnetic resonance imaging (fMRI). Materials and Methods : Eleven healthy right-handed subjects (Male: female, 6:5, mean age: 27.4years) were imaged on a Siemens 1.5T scanner. Whole brain functional maps were acquired using BOLD EPI sequences in the axial plane. Each paradigm consisted of five epochs of activation vs. the control condition. The activation tasks consisted of left finger complex movement, sensory stimulation of the left hand, word generation, listening comprehension, and working memory tasks. The reference function was a boxcar waveform. The activation maps were thresholded at p = 0.001. SPM 5 evaluated the activated areas and responses within the cerebellum. Results : Cerebellar activation was observed on motor task, word generation task, and working memory task. There were 949 activated areas and the mean fitted and adjusted response was 0.68 during the motor task. There were 319 activated areas and the mean fitted and adjusted response was 0.15 during the word generation task. There were 330 activated areas and the mean fitted and adjusted response was 0.26 during the working memory task. Conclusion : Our results suggest that the cerebellum is involved in a variety of functional tasks, including motor, word generation, and working memory tasks. However, during the motor task, the cerebellum showed a large activated area and a high response. Cerebellar function can be evaluated by fMRI.