• Journal of Radiation Industry
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• v.7 no.1
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• pp.1-5
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• 2013

Photostimulated luminescence (PSL) and thermoluminescence (TL) analyses were applied to identify the cookie molds mixed with 2 mg of 10 kGy-irradiated minerals according to cookie processing methods and sonication time (0~60 min) for mineral separation. PSL analysis showed that photon counts of cookies, dried or baked, ranged intermediate levels between the lower and upper threshold (700~5,000 counts/60 s), thereby showing its unsuitablility for screening of irradiated cookie. The TL glow curve intensities, measured according to mineral separation time (5, 10, 20, 40 and 60 mins) from the cookies using a sonicator, were high enough to identify irradiation status and significantly increased with the time in dried cookies. Those of baked cookies, however, were relatively low and not linearly increased with the time, but still possible to identify them (p<0.05).

• Journal of Convergence for Information Technology
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• v.9 no.5
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• pp.104-116
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• 2019

Transformational leadership(TL) is an effective job resource that can lead to innovative behavior. The new concern is to identify the mechanisms by which innovative behaviors persist, taking into account factors such as mediator. Therefore, this study intends to identify the mediating role of job engagement in the relationship between sub-factors of TL and innovative behavior. We conducted a questionnaire survey of 671 employees who are highly related to innovative behavior in public, private firms and utilized a structural equation analysis, mediation analysis to verify hypotheses based on previous studies. As a result, charisma and intellectual stimulation, which are sub-factors of TL were proved to influence innovative behavior through job engagement. The results of this study imply that companies need to utilize the measurement tool of job engagement and select leader with charisma and intellectual stimulation to sustain innovative behavior.

• Journal of Electrical Engineering and Technology
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• v.12 no.1
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• pp.443-450
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• 2017

Nowadays, Power Line Communication (PLC) is gaining high attention from industry and electric supply companies for the services like demand response, demand side management and Advanced Metering Infrastructure (AMI). The reliable services to consumers using PLC can be provided by utilizing an efficient PLC channel for which sophisticated channel modeling is very important. This paper presents characterization of a Low Voltage (LV) access network for Narrowband Power Line Communications (NB-PLC) using transmission line (TL) theory and a Simulink model. The TL theory analysis not only includes the constant parameters but frequency selectivity is also introduced in these parameters such as resistance, conductance and impedances. However, the proposed Simulink channel model offers an analysis and characterization of capacitive coupler, network impedance and channel transfer function for NB-PLC. Analysis of analytical and simulated results shows a close agreement of the channel transfer function. In the absence of a standardized NBPLC channel model, this research work can prove significant in improving the efficiency and accuracy of NB-PLC communication transceivers for Smart Grid communications.

• Proceedings of the Korea Electromagnetic Engineering Society Conference
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• 2005.11a
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• pp.29-32
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• 2005

In this paper, we present the 8 port in-phase power divider using right/left-handed transmission line. The proposed power divider splits the input power into 8 port regardless of the electrical length of transmission lines. Its size is much smaller than the conventional one. As the length of the transmission line in the power divider decreases, its bandwidth becomes wider.

• The Korean Journal of Applied Statistics
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• v.15 no.2
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• pp.415-421
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• 2002

Because most common assumption is normality in statistical analysis, testing normality is very important. We propose a new plot and test statistic to test for normality based on the modified Lorenz curve that is proved to be a powerful tool to measure the income inequality within a population of income receivers. We also compare the proposed test statistics with the W test (Shapiro and Wilk (1965)), TL test (Kang and Cho (1999)) in terms of the power of test through by Monte Carlo method. The proposed test is more usually powerful than the other tests except some case.

• Speech Sciences
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• v.8 no.1
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• pp.143-157
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• 2001

This paper focused on glottal parameters contributing to the perception of loud voices because energy of a voice is not the only effective factor. We used a formant synthesizer to synthesize loud voices. We divided F0 tilt (the tilt of F0 contour), SQ (Speed Quotient), OQ (Open Quotient) and TL (spectral Tilt Level) into three levels to get different combinations with default values for the other synthesizer parameters. Analysis of listening tests indicated that F0 tilt, SQ, OQ and TL in descending order had significant influence on the perception of loud voices. F0 tilt had a far more significant effect than the others. The influence of SQ increased greatly with the exclusion of F0 tilt as a factor. The interaction between parameters was not significant.

• Proceedings of the Computational Structural Engineering Institute Conference
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• 2011.04a
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• pp.500-503
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• 2011

본 연구에서는 Terrestrial Laser Scanning (TLS)를 이용한 보 구조물의 변위 및 응력 추정에 대한 기법을 개발하였다. TLS는 Geographic Informatio Systems (GIS) 분야에서 처음 도입된 시스템으로, 레이저 펄스를 통해 원격으로 목적물의 3차원 좌표 정보를 획득 할 수 있는 시스템이다. 그러나 이러한 TLS로부터 획득한 대상물의 3차원 좌표 데이터는 10mm 내외의 오차를 포함하고 있다. 이에 건축 구조분야에 적용 가능한 변형 정보를 획득하기 위해서는 보다 정밀한 데이터 획득을 위한 데이터 처리 기법이 필요하다. 또한 구조물의 응력의 경우 획득된 형상 위의 각 지점의 곡률로 인해 발생하기 때문에 구조물의 변형 추정시 보다 미세한 오차에도 크게 영향을 받아 심한 왜곡을 가져오게 된다. 그러므로 응력 추정시 추가적인 데이터 처리 기법이 필요하다. 이에 본 연구에서는 보 구조물의 응력을 추정할 수 있는 기법을 제시한다.

• 한국방재학회:학술대회논문집
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• 2010.02a
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• pp.34.1-34.1
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• 2010

TLS(Terrestrial Laser Scanning)는 레이저를 이용하여 물체의 3차원 위치 정보를 원격으로 획득할 수 있는 시스템이다. 그러나 TLS로부터 획득한 3차원 위치 정보는 처짐 또는 응력 평가 등에 있어서 구조 정보로서 사용하기에는 한계가 있다. 따라서 정밀한 형상정보의 획득을 위해서는 3차원 형상 좌표 정보에 대한 적절한 데이터 처리가 필요하다. 본 연구에서는 구조물에 작용하는 하중 또는 지점 조건에 대한 정보 없이 회기분석의 중첩을 이용하여 TLS로부터 얻은 대상물의 이산화 된 위치 정보로 부터 구조물의 정밀한 변형 형상을 추정할 수 있는 방법을 제시한다.

• Journal of electromagnetic engineering and science
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• v.15 no.1
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• pp.31-36
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• 2015

The design of a new compact band-pass filter is proposed, which is based on the microstrip composite right- and left-handed transmission- line (CRLH-TL) structure. Particularly, the interdigital coupled (IDC) lines of the CRLH geometry are proposed to be parted by inserting open stubs to meet the specifications on the passband. In addition, there is another pair of stubs to complete the design in a limited space. These are considered in the TL-based analysis and the design parameters are calculated by genetic algorithm optimization. The measurement is shown to be acceptable and agreeable with the circuit and electromagnetic field simulations. In addition, the zerothorder resonance (ZOR) phenomenon is verified.

• Journal of Electrical Engineering and Technology
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• v.11 no.4
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• pp.943-950
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• 2016

In this paper, we propose to analyze the physical characteristics of a planar dual-composite right-left handed transmission line by a common application of Bond Graph approach and Scattering formalism (Methodology S.BG). The technique, we propose consists, on the one hand, of modeling of a dual composite right-left metamaterial transmission line (D-CRLH-TL) by Bond Graph approach, and, it consists of extracting the equivalent circuit of this studied structure. On the other hand, it consists to exploiting the scattering parameters (Scattering matrix) of the DCRLH-TL using the methodology which we previously developed since 2009. Finally, the validation of the proposed and used technique is carried out by comparisons between the simulations results with ADS and Maple (or MatLab).