• KIEE International Transactions on Electrophysics and Applications
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• v.5C no.2
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• pp.81-85
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• 2005

This paper presents some interesting results regarding the harmonic performance on the photonic band-gap (PBG) structures formed by periodic conducting vias. Study on PBG structures has been one of the major topics in electromagnetics, microelectronics, and communications areas. In most of the studies, the band-gap filtering behavior was fulfilled by a periodic pattern of perforations on the ground planes of microstrip lines. Nevertheless, the PBG characteristics can also be realized using a periodic via-pattern along the transmission-line circuits. Hence, some of the via-typed PBG structures are studied and their frequency characteristics in terms of the scattering parameters are presented. It is found that by varying the length of vias with respect to the period pattern, different harmonic performances are observed.

• 제어로봇시스템학회:학술대회논문집
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• 2002.10a
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• pp.107.4-107
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• 2002

One of the most important functions of a biped robot is to walk naturally like human. For the human being, toe is very important joint in order to walk naturally. Thus, for a biped robot, the existence of toe joint much affects gait pattern generation and contributes to natural walking, which is similar to the human gait or faster walking like running. Since a conventional biped robot has the feet which consist of soles without toes, it seems difficult to walk naturally. For realizing the gait to be similar to human one, toes are necessary to the biped robot. In this paper, the effect of the toe joint for gait pattern generation is studied. In order to find the effect of toe joint, a biped r...

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2003.06a
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• pp.1174-1177
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• 2003

In this study, to achieve the optimal conditions for mechanical hyper-fine pattern fabrication process, deformation behavior of the materials during indentation was studied with numerical method by ABAQUS S/W. Polymer (PMMA) and brittle materials (Si, Pyrex glass) were used as specimens, and forming conditions to reduce the elastic recover and pile-up was proposed. The indenter was modeled a 3D rigid surface. Minimum mesh sizes of specimens are 1-10nm. Comparison between the experimental data and numerical result demonstrated that the finite element approach is capable of reproducing the loading-unloading behavior of a nanoindentation test. The result of the investigation will be applied to the fabrication of the hyper-fine pattern.

• Journal of Ginseng Research
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• v.11 no.1
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• pp.24-31
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• 1987

We studied a assay method on the measurement of superoxide dismutase (SOD Superoxide : superoxide oxidoreductase, EC. 1. 15. 1. 1) activity with photoreduced flavin and nitroblue tetrazolium (NBT) as superoxide (${O_2}^{-}$) source and detector, respectively. The $\Delta$E (1000 ng SOD$.$$min.)^{-1}$ of photoreduced flavin-NBT system was 0.08, whereas that of xanthine-xanthine-cytochrome system used broadly in experiments was 0.014. Therefore, the new method was regarded more simple and utilizable than xanthine-xanthine cytochrome system method. In the present paper, we also carried out to investigate the SOD activity and isozyme pattern for the parpose of study of leaf-burning disease in ginseng (Panax ginseng C.A. Meyer) leaves.

• 제어로봇시스템학회:학술대회논문집
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• 1987.10b
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• pp.324-328
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• 1987

In this study a computer-aided textile pattern design system is implemented and a control methodology of a dobby motion is studied. The described system allows the user to design various weave patterns through graphic editor and to simulate weaving by displaying the dummy weaving process on the monitor. In addition, if the yarn colors are specified it is also possible to analyze color weaves. Thus it can replace effectively a conventional. design tool, a design paper. The main features of the system are to design weave patterns, to show weaving effect, and to make lifting plan for the dobby motion control. In dobby motion control, the mechanical. control method conventionally used is not adequate for the loom which is linked with the computer-aided textile pattern design system, so an electromagnetic control method is proposed.

• Proceedings of the Korea Contents Association Conference
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• 2004.05a
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• pp.224-228
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• 2004

Various web_based ERP(Enterprise Resource Planning) are developed as the Internet is popularized in If or non If fields. But, in many case of web development method, It is not systematic analysis method, Therefor developer have difficulties with applying the development methods for a large scale application. this approach is studied on design pattern analysis of web ERP for the rapid and efficient development method. as this approach, various design pattern of web and ERP can be used in development method of component generation.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.41 no.12
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• pp.1748-1751
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• 2016

In this correspondence, we studied 3D uniform rectangular array as an extension of interpolation technique to compensate the beam pattern of 3D conformal array. The simulation result shows outstanding performance comparing to 2D interpolations.

• Korean Journal of Veterinary Research
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• v.14 no.2
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• pp.207-210
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• 1974

Pharmacological investigation was performed in chickens which were pretreated with reserpine. Transmural stimulations were given to the isolated jejunum of chickens and studied the responses and the effects of dibenamine, propranolol, atropine and tetrodotoxin on them. The results obtained were summerized as follows: 1. Three different patterns of response were obtained from the isolated jejunum of non-treated chickens after giving them transmural stimulation. The first pattern was contraction followed by relaxation, the second pattern was contraction only and the third pattern was relaxation only. 2. The transmural stimulation of the jejunum preparations evoked relaxation while the periarterial stimulation evoked contraction in the reserpinized chick. 3. The relaxation response to the transmural stimulation was not affected by the pretreatment with dibenamine, propranolol and atropine. 4. The relaxation response to the transmural stimulation was abolished by tetrodotoxin. The results obtained in these studies indicate that the relaxation response to the transmural stimulation is due to non-adrenergic inhibitory fibers.

• Korean Journal of Clinical Pharmacy
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• v.3 no.1
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• pp.21-30
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• 1993

The contents of caffeine in caffeine containing products in Korea, i.e., coffee. tea, cocoa and cola, and the individual pattern of consumption of caffeine containing beverages were studied to know the pattern of caffeine consumption. The correlation in between the amount of caffeine consumption and the obesity were also investigated. In results, the average contents of caffeine in the instant coffee was $31.8\pm4.4mg/g(mean{\pm}SD)$. The amount of caffeine in coffee were $68.2\pm13.0\;mg/cup$ in the vending machine coffee, and $76.6\pm12.1\;mg/cup$ in the coffee shop coffee. Average daily caffeine consumption per person was investigated to be 128mg with the wide range of 26mg-341mg. There was no correlation in the amount of daily caffeine consumption and the obesity.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2015.10a
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• pp.803-805
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• 2015

MIMO receiver for multiplexing gain brings about antenna volume issue to which beam pattern switching scheme shall be one of the solutions. This scheme has been studied mainly in theory. This paper presents the test results and performance analysis of 2x2 MIMO receiver we implemented by using beam pattern switching.