• The Journal of the Korea Contents Association
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• v.18 no.10
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• pp.558-567
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• 2018

This study was the first attempt to investigate which factors influence problem gambling among out-of-school adolescents in South Korea. Using data from the 2015 Survey on Youth Gambling Problems, this study examined the influences of personal characteristics and betting games on problem gambling among out-of-school adolescents. Regression analyses of personal characteristics on problem gambling showed that being male adolescents, having more allowance, living without parents/guardians, or belonging to probation was associated with higher likelihood of doing problem gambling among out-of-school adolescents. Also, regression analyses of betting games on problem gambling revealed that doing betting games more frequently, doing betting games more time, or spending more money on betting games was associated with higher likelihood of doing problem gambling among out-of-school adolescents. Based on the findings, this study suggested practice and policy implications for addressing problem gambling among out-of-school adolescents.

• The Journal of Internal Korean Medicine
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• v.38 no.5
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• pp.812-819
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• 2017

Objectives: The purpose of this study was to report the long-term efficacy of herbal medicine for treatment of patients with recurrent aphthous stomatitis (RAS). Methods: We reviewed the clinical records of 17 patients with RAS who visited the Oral Diseases Clinic of Kyung Hee University Korean Medicine Hospital from September 1st, 2014 to August 29th, 2017. The patients were treated with herbal medicine for more than 3 consecutive weeks, followed by a telephone survey. We evaluated the clinical characteristics of RAS, and compared the short-term and long-term efficacy of herbal medicine treatment. Results: After treatment with herbal medicine, the clinical characteristics improved in the 17 patients with RAS, especially in terms of the duration and interval of recurrence. Prolonged effects were reported upon the follow-up telephone survey. Conclusion: Herbal medicine treatment may have a long-term effect in patients with RAS.

• KSTLE International Journal
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• v.3 no.2
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• pp.110-113
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• 2002

The lubricative characteristics of negative pressure slider were performed by using coordinate transform method. Governing equation is derived by applying generalized coordinate system to the divergence formulation method. This method makes it possible to deal with an arbitrary configuration of a lubricated surface. The pressure profile of the slider is calculated. These results are compared to that from direct numerical method. The steady-state, including minimum film thickness, pitching and rolling angle are calculated by multi-dimensional Newton-Rapshon method. The stiffness and damping characteristics are also calculated.

• 한국정보디스플레이학회:학술대회논문집
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• 2007.08b
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• pp.1733-1736
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• 2007

Integral floating is three-dimensional display technique which is a combination of integral imaging and floating display. In this paper, we explain and analyze the relation between the special viewing characteristics and the system factors of integral floating system. The experimental results which prove the analysis will be presented.

• Proceedings of the KIEE Conference
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• 1998.07g
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• pp.2504-2508
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• 1998

In this paper, we propose the new detecting method for three dimensional piezoresistive silicon accelerometer. Furthermore the accelerometer is formed to have endurance for high temperature by perfect isolation of the piezoresistors using Silicon On Insulator(SOI) wafer. Sensor size are optimized with analytical formulae and extended with FEM simulation for the more detailed results. The accelerometer was fabricated by bulk micromachining techonology. We measured the temperature characteristics and the output characteristics, and the both characteristics were compared with the simulated results

• Proceedings of the KIEE Conference
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• 1996.07c
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• pp.1609-1611
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• 1996

The on-resistance characteristics of the RESURF LDMOS and VDMOS are compared. The on-resistance vs. breakdown characteristics of the RESURF LDMOS is analytically investigated. The on-resistance of RESVRF LDMOS is as almost same as that of VDMOS.

• Proceedings of the Korean Institute of Surface Engineering Conference
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• 2009.05a
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• pp.219-219
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• 2009

In this study, electrochemical impedance characteristics of anodic oxide layer formed on titanium ternary alloy surface have been investigated, Titanium oxide layers were grown on Ti-29Nb-xZr(x=3, 5, 7, 10 and 15 wt%) alloy substrates using phosphoric acid electrolytes.

• Proceedings of the KIEE Conference
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• 2006.07b
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• pp.647-648
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• 2006

In this paper, magnetic levitation characteristics of hybrid magnets are experimentally shown under the newly proposed airgap condition. The digital PID controller is utilized to control the airgap of the magnetic levitation system.

• Transactions of the Korean Society of Automotive Engineers
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• v.17 no.2
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• pp.82-89
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• 2009

In order to investigate the spray characteristics according to diesel and bioethanol blending with biodiesel fuel, macroscopic spray characteristics were analyzed from the comparison of the effect of the injection pressure, ambient pressure and density on the spray tip penetration and spray cone angle. In addition, spray atomization characteristics were studied with local and overall Sauter mean diameter (SMD) and the contour map of SMD distribution at various injection conditions. It was revealed that the spray tip penetration of biodiesel fuels blended with diesel and ethanol was shorter than that of an undiluted biodiesel fuel at low injection pressure. However, the difference of spray tip penetration among three test fuels reduces at a high injection pressure. Increase of the ambient gas density leads to the decrease of the spray tip penetration of three test fuels. When diesel and ethanol fuels add to an undiluted biodiesel fuel, spray cone angle increases due to the decrease of the fuel density at the same ambient pressure condition. On the other hand, the droplet mean diameter decreases due to the reduction of the kinematic viscosity and surface tension.

• Journal of the Korean Institute of Educational Facilities
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• v.24 no.5
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• pp.3-10
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• 2017

This study was tried to find out characteristics of students' movement in classroom and homeroom. The object was the school whose homebase management was different by grade. Observation research was tried about middle school class that is simultaneously worked with different type of homeroom and the movement of students under various situations was analyzed. As a result, students in exclusive subject classroom moved in short time within one or two minutes after class. In case of exclusive homeroom, returning frequency of students was nearly about 85 to 100 percent within ten minutes in end of end. Behavioral characteristics of students in dual purpose homeroom was similar in exclusive subject classroom. The class using dual purpose homeroom showed high ratio in use of center homebase, therefore, returning frequency at short recess time was extremely low. In case of dual purpose homeroom at lunch time, next class students moved in early time and maximized within one or two minutes in end of end. These results are thought to be useful for planning spaces of variation type.