• Journal of Biomedical Engineering Research
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• v.41 no.2
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• pp.107-119
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• 2020

The deep neural networks (DNN) that can replicate the behavior of the human expert who recognizes the characteristics of ECG waveform have been developed and studied to analyze ECG. However, although the existing DNNs can not provide the explanations for their decisions, those trials have attempted to determine whether patients have certain diseases or not and those decisions could not be accepted because of the absence of relating theoretical basis. In addition, these DNNs required a lot of training data to obtain sufficient accuracy in spite of the difficulty in the acquisition of relating clinical data. In this study, a small-sized continuous data processing DNN (C-DNN) was suggested to determine the simple characteristics of ECG wave that were not required additional explanations about its decisions and the C-DNN can be easily trained with small training data. Although it can analyze small input data that was selected in narrow region on whole ECG, it can continuously scan all ECG data and find important points such as start and end points of P, QRS and T waves within a short time. The star and end points of ECG waves determined by the C-DNNs were compared with the results performed by human experts to estimate the accuracies of the C-DNNs. The C-DNN has 150 inputs, 51 outputs, two hidden layers and one output layer. To find the start and end points, two C-DNNs were trained through deep learning technology and applied to a parameter acquisition algorithms. 12 lead ECG data measured in four patients and obtained through PhysioNet was processed to make training data by human experts. The accuracy of the C-DNNs were evaluated with extra data that were not used at deep learning by comparing the results between C-DNNs and human experts. The averages of the time differences between the C-DNNs and experts were 0.1 msec and 13.5 msec respectively and those standard deviations were 17.6 msec and 15.7 msec. The final step combining the results of C-DNN through the waveforms of 12 leads was successfully determined all 33 waves without error that the time differences of human experts decision were over 20 msec. The reliable decision of the ECG wave's start and end points benefits the acquisition of accurate ECG parameters such as the wave lengths, amplitudes and intervals of P, QRS and T waves.

• Convergence Security Journal
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• v.14 no.6_1
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• pp.75-87
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• 2014

It may be meaningful that analysis of possible continuity and change of North Korea's Kim Jong-un's ruling in its third year. For this analysis, for the application more rational and statistical analysis methods, this study takes advantage of the new years' messages of Kim Il Sung, Kim Jong Il, and Kim Jong-un. In North Korea, the new years' messages are rare enough to give influence to every field of the North Korea's community and the New Year's message performs tutorial role throughout the whole year. The said messages of Il Sung, Kim Jong Il, and Kim Jong-un regimes have been researched and comprehensively summarized. The summarized New Year's Message by Kim Il Sung, Kim Jong Il, and Kim Jong Un are separated, compared and analyzed by the regime by presentation method, configured information, and others followed by New Year message's characteristics and implications of each North Korean regime that have been investigated. Based on the results of this analysis of Kim Jong-un era, possibility of its continuation and change is forecasted. Above all, for possible continuation of the ruling, sticking to the governing socialist way and military-first politics are presented. For possible causes of change, such the four factors as partial opening to overcome economic problems, the North Korean nuclear issue, influx of the nature of capitalism, and Kim Jung-un's control weakness have been presented. Such the factors of possible change and continuation of the North Korea Kim Jung-un ruling are expected to work as a combination of factors. The issue of continuation and change of North Korea Kim Jong-un's control is a key point for us to solve the issues between North and South Koreas. In the situation that the whole people of South Korea have a national consensus in the effort of gathering the public opinion, it is a high time that we needed to have much flexibility to actively cope with the North Korean issues.

• Journal of Ginseng Culture
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• v.2
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• pp.39-70
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• 2020

In this paper, through the mutual interpretation and verification of the ancient Korean history books with different origin that have been suspected as false documents, it proves that they could be logically real records and reveal that the substance of the legendary 'medicine for anti-aging and longevity', which also had been mentioned in Chinese old books, is Korean ginseng. Furthermore, with reference to the modern Y chromosomal map of the migratory routes of mankind corresponding to these routes recorded in 「Budoji」, the core history book, the formation of the four ethnic constitution groups (Sasang Constitution) based on the life style of each human group has been estimated. And the cause of Korean ginseng with fever problem for Southeast Asians is their pharmacogenomic constitution problem by protopanaxatriol (PPT) type ginsenosides in ginseng. It was resolved with over production of protopanaxdiol (PPD) type ginsenosides against PPT type in Korean red ginseng as historical or scientific point of view. In addition, by explaining that the processing method to Korean red ginseng could increase red ginseng acidic polysaccharides (RGAP), the RGAP, PPD type ginsenosides, and arginine which is originally abundant in Korean ginseng could increase the expression of the 'heat shock proteins' as a kind of chaperone in the body, this paper presents the theory allowing the scientific interpretation of the efficacy of Korean red ginseng as an 'adaptogen' or 'medicine for anti-aging and longevity'. Lastly, through the consideration of the growing environment of American ginseng and Korean ginseng, the differences are presented.

• Journal of the Korea Fashion and Costume Design Association
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• v.19 no.2
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• pp.29-37
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• 2017

Due to the pursuit of individuality by modern consumers, the day has come when it is hard for design to be sustained solely by external beauty. Accordingly, products with the psychological value and brand stories are appearing, so that products that reinterpret traditional crafts are now being appreciated for their merits. Handmade goods defined as new luxury goods or products of high-quality craftsmanship are being used to enhance the consumer's individual image, and has created an unprecedented consumer stratum structure. Japan is one of the countries that actively applies traditional crafts to contemporary design and this study aims to investigate cases that are being reinterpreted in modern fashion in the theme of Boro, which is not as well known among Japanese traditional crafts. The purpose of this study is to offer basic data for designers by investigating the cases of the reinterpretation of traditional crafts. In addition, in reinterpreting traditional crafts into other fields, it is regarded as a meaningful way to contribute to a variety of other ideas. As the research method, first, the definition and kind of Boro were investigated utilizing the related literature information about the traditional fabric of Boro, which is the starting point and basis of the research. Second, Japanese aesthetic sense defined in the previous research was classified and the relationship of the anti-decorative aesthetic sense and Boro investigated. Third, after classifying the reinterpretation cases of Boro that have appeared in four major fashion collections and designer brands from 2011 to 2016 by the selected aesthetic sense, its characteristics were investigated. The search for examples of the reinterpretation of Boro uses the results of the keyword search of Boro and Boro Fashion via the internet search engine Google from April 2016 to December 2016. In addition, the search results were selected on the basis of whether the designer specified borrowing from Boro or whether Boro on the collection order was included or not. In addition to introducing an unknown fabric craft, this study also raises the methodological problems of the reinterpretation of traditional crafts. Products containing psychological value are expected to come into the spotlight in the upcoming consumer market. Therefore, as a follow-up study, it is suggested to research examples in which various crafts are being applied as products before one knows, how this creates new originality, and the limitations involved in this.

• The Journal of Korean Academy of Prosthodontics
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• v.41 no.5
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• pp.582-595
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• 2003

Statement of problem : Most posts are metallic, but in response to the need for a post that possesses optical properties compatible with an all-ceramic crown. an esthetic post has been developed. Although there have been many studies about the esthetic post materials, 3-dimensional finite element studies about the stress distribution of them are in rare. Purpose : The purpose of this study is to investigate comparatively the distribution of stresses of the restored, endodontically treated maxillary incisors with the esthetic post materials and the displacement on the cement layer on simulated occlusal loading by using a 3-dimensional finite element analysis model. Material and method : Four 3-dimensional finite element models were constructed in a view of a maxillary central incisor, a post, a core, and the supporting tissues to investigate the stresses in various esthetic posts and cores and the displacement on the cement layer (Model 1 ; Cast gold post and core, Model 2 ; Glass fiber post with composite core, Model 3 ; Zirconia post with composite core. Model 4 ; Zirconia post with ceramic core). Force of 300N was applied to the incisal edge and the cingulum (centric stop point) with the angle of 135-degree to the long axis of the tooth. Results : 1. The stresses and displacement on the incisal edge were higher than on the cingulum 2. The stresses in dentin were the highest in Model 2 (Glass fiber post with composite core), and the second was Model 3, the third Model 1, and the lowest Model 4. 3. The stresses in post and core were the highest in Model 4 (Zirconia post with ceramic core), and the second was Model 1, the third Model 3, and the lowest Model 2. 4. The displacement on the cement layer was the highest in Model 2 (Glass fiber post with composite core), and the second was Model 3, the third Model 1, and the lowest Model 4. Conclusion : When a functional maximum bite force was applied, the distribution of stresses or the esthetic post and core materials and the displacement on the cement layer were a little different. It seems that restoring extensively damaged incisors with esthetic post and core materials would be decided according to the remaining tooth structure.

• Archives of design research
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• v.16 no.3
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• pp.241-252
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• 2003

Currently while a phase of the Internet as an advertising media is firm, and Internet advertisement utilization of a company rises, and the consumers contact with various Internet advertisements. A lot of Internet advertisements of various forms made with new technology to develop rapidly are executed and will disappear again. Now, It is necessary to classify various types of the Internal advertisement which was made by a sharp environment change, and was tested of the last ten years and to classify expression techniques systematically. At the same time, we have to check a development direction of domestic Internet advertisement and trend. It is a point of time that Internet advertisement must be designed in a macroscopic dimension like the four medium advertisement by an advertisement strategy and an expression strategy. In this paper, first I classified a type of domestic Internet advertising into marketing, an advertisement purpose, an expression form, manufacture technology, and an express on method systematically in five sides so far And I tried to consider the form and characteristics. By next time, while examine change of internet marketing paradigm, I checked trend of recently domestic Internet advertising in accord to a change of consumer's use tendency and a change of Internet advertisement manufacture technology, and tried to consider the development course in the marketing side, the manufacture technical side, and the creative side. Finally, I wish to propose necessity of expression strategy establishment to promote development of the interactive advertisement technique that considered the creative side in order to raise an effect of Internet advertisement.

• Journal of Animal Science and Technology
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• v.46 no.1
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• pp.115-122
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• 2004

This study was performed to investigate the behavioral characteristics of Hanwoo(Bos taurus coreanae) cows and their calves. Four cows and their calves were placed in pens. The behaviors of each cow and calf were recorded using a time lapse VCR from 07:00 h to 18:00 h for 6 days and were analyzed using the scan point sampling method. The cow's behaviors in order of frequency were LD(lying down, 25%), ST(standing, 23%), EA(eating, 13%), LR(lying down rumination, 10%) and SR(standing rumination, 7%). The cows spent less than 3% of their time PG(pairwise grooming) and SF(snifting). The calves mainly showed LD(52%), ST(28%), LF (lying flat, 4%), EA(3%) and WA(walking, 3%). The calves spent less than 2% of their time SF(sniffing) and SUK(suckling), The behavioral patterns of cows and their calves at 07:00 h, 12:00 h and 18:00 h were different, especially in ST and LD.

• Journal of Korean Association for Spatial Structures
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• v.2 no.1 s.3
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• pp.85-92
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• 2002

Two way grid single-layer domes are of great advantage in fabrication and construction because of the simple fact that they have only four members at each junction. But, from a point of view of mechanics, the rectangular latticed pattern gives rise to a nonuniform rigidity-distribution in the circumferential direction. If the equivalent rigidity is considered in the axial direction of members, the in-plane equivalent shearing rigidity depends only on the in-plane bending rigidity of members and its value is very small in comparison to that of the in-plane equivalent stretching rigidity. It has a tendency to decrease buckling -strength of dome considerably by external force. But it is possible to increase buckling strength by the use of roofing covering materials connected to framework. In a case like this, shearing rigidity of roofing material increases buckling strength of the overall structure and can be designed economically from the viewpoint of practice. Therefore, the purpose of this paper, in Lamella dome and rectangular latticed dome that are a set of 2-way grid dome, is to clarify the effects of roofing covering materials for increasing of buckling strength of overall dome. Analysis method is based on FEM dealing with the geometrically nonlinear deflection problems. The conclusion were given as follows: 1. In case of Lamella domes which have nearly equal rigidity in the direction of circumference, the rigidity of roofing covering materials does not have a great influence on buckling-strength, but in rectangular latticed domes that has a clear periodicity of rigidity, the value of its buckling strength has a tendency to increase considerably with increasing rigidity of roofing covering materials 2. In case of rectangular latticed domes, as rise-span-ratio increases, models which is subjected to pressure -type-uniform loading than vertical-type-uniform loading are higher in the aspects of the increasing rate of buckling- strength according to the rate of shear reinforcement rigidity, but in case of Lamella dome, the condition of loading and rise-span-ratio do not have a great influence on the increasing rate of buckling strength according to the rate of shear reinforcement rigidity.

• Journal of Environmental Science International
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• v.20 no.10
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• pp.1273-1284
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• 2011

The aim of this research was to evaluate the performance of insoluble electrode for the purpose of degradation of Rhodamine B (RhB) and oxidants generation [N,N-Dimethyl-4-nitrosoaniline (RNO, indicator of OH radical), $O_3$, $H_2O_2$, free Cl, $ClO_2$)]. Methods: Four kinds of electrodes were used for comparison: DSA (dimensional stable anode; Pt and JP202 electrode), Pb and boron doping diamond (BDD) electrode. The effect of applied current (0.5~2.5 A), electrolyte type (NaCl, KCl and $Na_2SO_4$) and electrolyte concentration (0.5~3.5 g/L) on the RNO degradation were evaluated. Experimental results showed that the order of RhB removal efficiency lie in: JP202 > Pb > BDD ${\fallingdotseq}$ > Pt. However, when concerned the electric power on maintaining current of 1 A during electrolysis reaction, the order of RhB removal efficiency was changed: JP202 > Pt ${\fallingdotseq}$ Pb > BDD. The total generated oxidants ($H_2O_2$, $O_3$, free Cl, $ClO_2$) concentration of 4 electrodes was Pt (6.04 mg/W) > JP202 (4.81 mg/W) > Pb (3.61 mg/W) > BDD (1.54 mg/W), respectively. JP202 electrode was the best electrode among 4 electrodes from the point of view of performance and energy consumption. Regardless of the type of electrode, RNO removal of NaCl and KCl (chlorine type electrolyte) were higher than that of the $Na_2SO_4$ (sulfuric type electrolyte) RNO removal. Except BDD electrode, RhB degradation and creation tendency of oxidants such as $H_2O_2$, $O_3$, free Cl and $ClO_2$, found that do not match. RNO degradation tendency were considered a simple way to decide the method which is simple it will be able to determinate the electrode where the organic matter decomposition performance is superior. As the added NaCl concentration was increases, the of hydrogen peroxide and ozone concentration increases, and this was thought to increase the quantity of OH radical.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.38 no.10
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• pp.1093-1100
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• 2014

The purpose of this paper is to suggest a weight-reduction design method for the hybrid carbody of a high-speed maglev train that uses aluminum extrusion profiles and sandwich composites. A sandwich composite was used on the roof as a secondary member to minimize the weight. In order to assemble the sandwich composite roof and aluminum extrusion side frame of the carbody using welding, a guide aluminum frame located at the four sides of the sandwich composite roof was introduced in this study. The clamping force of this guide aluminum frame was verified by three-point bending test. The structural integrity and crashworthiness of the hybrid carbody of a high-speed maglev train were evaluated and verified according to the Korean Railway Safety Law using a commercial finite element analysis program. The results showed that the hybrid carbody composed of aluminum extrusion frames and a sandwich composite roof was lighter in weight than a carbody made only of aluminum extrusion profiles and had better structural performance.