• The Journal of Korean Institute of Communications and Information Sciences
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• v.18 no.8
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• pp.1190-1200
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• 1993

In this work, the performance of both delay sensitive traffics and loss sensitive traffics of the output buffered ATM switch with priority control mechanisms has been evaluated. We choose the partial buffer sharing mechanism as the loss priority control mechanism and the HOL(Head Of Line) priority control mechanism as the time priority control mechanism. We model loss sensitive traffics with Poisson process and delay sensitive traffics with MMPP. With loss priority control, it is confirmed that loss probability of loss sensitive traffice decreases when the loss priority control mechanism is chosen. With time priority control, it has also been confirmed that mean cell delay of delay sensitive traffics decreases when the HOL priority control mechanism is used. From this analysis, It has been confirmed that the requirements of QOS for both loss sensitive and delay sensitive traffics can be satisfied in the ATM switch by combining both the loss priority control mechanism and the HOL priority control mechanism.

• Korean Journal of Optics and Photonics
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• v.9 no.3
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• pp.162-167
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• 1998

$SiO_xF_y$ optical thin films of lower refractive indices than glass substrates were fabricated by the CF$_4$ ion beam assisted deposition method and the optical, structural and chemical properties of them were investigated. Refractive index of $SiO_xF_y$ films was varied from 1.455 to 1.394 by decreasing the anode voltage or from 1.462 to 1.430 by increasing the current density of end-Hall ion source. FT-IR and XPS analyses show that as the F concentration increases, the Si-O bond at $1080m^{-1}$ shifts to higher wavenumber, the OH bonds are reduced drastically, and the fluorine atoms at the air-film interface are desorbed out by reacting with $H_2O$ in the atmosphere. $SiO_xF_y$ thin films are amorphous by the XRD analysis and have the compressive stress below 0.3 GPa. As an application of $SiO_xF_y$ thin films a two-layer antireflection coating was fabricated using a $SiO_xF_y$ film as a low refractive index layer and a Si film as an absorbing one.

• The Korean Journal of Community Living Science
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• v.27 no.1
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• pp.31-47
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• 2016

This research examines the effects of consumers' moderation and simplicity, autonomy, and income level on happiness, and based on this, classifies consumer types and examines the differences in consumer happiness and life happiness in accordance with this classification. The questionnaire survey was conducted on adults in their 20's through 60's. Moreover, hierarchical regression analysis, cluster analysis, and the analysis of variance were conducted. The results of this research are as follows. First, on consumer happiness, moderation and simplicity, income level, autonomy, education level, and gender had significant effects; on life happiness, moderation and simplicity, income level, autonomy, and education level had significant effects. Second, consumers were classified into three types according to moderation and simplicity, autonomy, and income level, and when making a comparison based on these factors between consumer happiness and life happiness, both consumer happiness and life happiness showed significant differences, but the detailed aspects were different. In the case of consumer happiness, non-autonomous moderation and simplicity type were reported to have the highest sense of happiness, followed by autonomous moderation and simplicity type, and passive moderation and simplicity type, but in the case of life happiness, autonomous moderation and simplicity type were reported to have the highest sense of happiness, followed by non-autonomous moderation and simplicity type, and passive moderation and simplicity type.

• The Journal of Internal Korean Medicine
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• v.38 no.4
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• pp.491-500
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• 2017

Objectives: This clinical study reports the effects of Cheonggansoyo-san (CSS) on three patients with glossodynia. Methods: Three patients with glossodynia were treated with CSS (i.e., an herbal medicine) and acupuncture. Numeric rating scales (NRSs) for glossodynia and dry mouth and hwa-byung questionnaire scores were evaluated, and the results from heart rate variability (HRV) evaluations were analyzed. Results: After treatment with CSS, three patients' glossodynia symptoms, such as burning sensations, tingling, and numbness of the tongue, were improved. NRS ratings for glossodynia and dry mouth and the hwa-byung questionnaire scores also improved, and HRV parameters were closer to the normal range. Conclusion: Cheonggansoyo-san could be used to treat glossodynia.

• Journal of Oriental Neuropsychiatry
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• v.6 no.1
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• pp.61-70
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• 1995

This study was aimed to evaluate the anti-stress effect of Chungkansoyosan on the rats stressed by immobilizaton. The experimintal animals were immobilized in stress box $(5cm{\times}5cm{\times}20cm)$ for 12 hours in a day during 3 days, and administered 90ng/100g Chungkansouosan extract for 15 days before stress. The epinephrine, dopamine contents in rat brain were measured by using HPLC method. The following results were obtained: 1. Total cholesterol contents of control group was $58.1{\pm}2.56mg/dl$, that of sample group was $61.6{\pm}3.70mg/dl$. This shows decreasing effect, but not significant. 2. Triglyceride contents of control group was $39.8{\pm}6.75mg/dl$ that of sample group was $27.7{\pm}4.23mg/dl$. This shows significant decrease in sample group comparing to control group. 3.Epinephrine contents of control group was $8.21{\pm}0.31ng/mg$ that of sample group was $6.33{\pm}1.02ng/mg$ this shows significant decrease in sample group comparing to control group. 4. Dopamine contents of control group was $2.45{\pm}0.23ng/mg$ that of sample group was $1.65{\pm}0.41ng/mg$ this shows decreasing effect, but not significant. 5. The quantity of muscle relaxation by Rota Rod was improved significantly by Chungkcansoyosan in immobilizaton-stressed rats. According to the above results, it is concluded that Chunkansoyosan will be useful as a preventive and remedy against stress disease.

• Journal of the Korean Institute of Telematics and Electronics
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• v.8 no.2
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• pp.24-33
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• 1971

A noble method of delta modulation by means of pair transistor circuit having negative resistance charcteristic is presented. An RC parallel circuit is inserted between two eiuitter tarminals of the pair transistor circuit, and their emitters are driven by a square pulsed current source. Basically this is a relaxation oscillator circuit. But when the value of capacitors and resistanc R, and the pulse height of driving source are properly chosen, the RC parallel circuit apparently functions as integrating circuit of driviving pulses. Compared with the integrated voltage of capacitor C, a signal input voltatage supplied in series with RC parallel circuit between two emitters makes on or off either of the pair transistors. as the result, one bit pulse is sent out from the coupling resistance terminal of conducted transistor. The circuit diagram used for this experiment is presented, it i% composed with simple mod ulster circuit, differential amplifier and pulse shaping amplifier, The characteristics of the components of this ciruit are discussed, and especially quantumized noise in this delta modulation system is discussed in order to improve the signal to noise ratio which has a close relation with circut constants, quantumized voltage, pulse height and width of driving current source.

• The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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• v.29 no.4
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• pp.218-231
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• 2016

Objectives : To report the patient bilateral facial palsy, because it is unusual. Methods : One patient with bilateral facial palsy was selected. Herbal medicine(Cheunggansoyosan, bubidongyeom-2) was administered and acupuncture was applied for twice a day in 73 days. Facial function was evaluated by House-Brackmann scale, Yanagihara's scale and Standardization of muscular paralysis. Results : Cheunggansoyosan, bubidongyeom-2 and acupuncture treatment improved facial function after 73 days of treatment. Adverse effects were not reported. Conclusions : This study shows that the Korean medicine treatment was effective in improving bilateral facial palsy.

• Korean Journal of Environmental Biology
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• v.22 no.1
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• pp.233-241
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• 2004

Chlorophyll fluorescence and antioxidative enzyme activity were investigated from leaves of Crinum asiaticum var. japonicum under the natural condition in winter, in order to monitor plant response and physiological states such as vitality, productivity and so on. In the O-J-I-P transients, the fluorescence intensity of J, I, P-step decreased remarkably depending on temperature drop in winter. The photochemical efficiencies of PSII, Fv/Fm, were significantly low in late winter with decrease of Fm. These results indicate that Crinum plants were affected by seasonal drop of temperature. The catalase activity significantly decreased depending on temperature drop in winter. However, the activity of superoxide dismutase ascorbate peroxidase and peroxidase slightly increased in winter while some isoenzymes appeared in winter. These results, with the remarkable decrease of Ev/Fm in winter, represent that Crinum plants were exposed to oxidative stress and subsequently damaged leading to cell death.

• Journal of Korean Society of Transportation
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• v.35 no.4
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• pp.292-306
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• 2017

Traffic noise cost can be assessed either by the damage cost approach or by the avoidance cost method. This paper provides an overview of pertinent studies of these two approaches and shows that the damage cost approach is more universal and reliable than the avoidance cost counterpart. This study then investigated three sub-components to address the damage cost framework. First of all, unit value per person exposed to noise per year was calculated. Secondly, the area exposed to noise was determined using noise prediction equation. Thirdly, the number of people affected by noise was computed by multiplying the number of people exposed to noise with the percentage of people affected by noise. This paper also suggested a simplified equation that represents the relationship between damage costs and noise levels. Finally, the benefits of noise reduction derived from the damage cost method and those from the avoidance cost approach were compared and discussed.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.17 no.4
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• pp.857-862
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• 2013

Due to the development of the online and mobile, cases of introducing CMS(Contents Management System) and WCMS(Web Contents Management System) to manage Web-Contents of individual and company's homepage are continuously increasing. In this paper, it is necessary to develop WCMS that can establish GUI(Graphic User Interface) based WCMS and edit contents using more concise procedures. In this paper, by reconfiguring WCMS-based Web contents using user-definition, we designed the system that can effectively and conveniently edit web contents as GUI-based. Also, we studied the intuitive and convenient web-contents management methods through researches using simplified logic. Therefore, proposed WCMS based Web-contents editing system allows the users to edit and modify the web contents much more quickly and conveniently compared to the existing web-contents editing system.