• Journal of the Korean Institute of Telematics and Electronics
• /
• v.25 no.2
• /
• pp.188-195
• /
• 1988

The electronic states in implanted n-type silicon inversion layers have been calculated by solving Schrodinger and Poisson's equations self-consistently. The results show that implantation affects seriously energy levels, populations, and electron distribution of n-type silicon inversion layers. The calcualted channel charge is in excellent agreement with the experimental data reported elsewhere. This analysis is expected to provide powerful means to evaluate the performance of implanted n-channel MOSTs.

• Transactions of the Korean Society of Mechanical Engineers B
• /
• v.37 no.10
• /
• pp.887-894
• /
• 2013

Effective thermal conductivity of nanofluids has been predicted by using generalized self-consistent model and modified Eshelby model, which have been used for analysis of material properties of composites. A nanolayer between base fluid and nanoparticle, one of key factors for abrupt enhancement of thermal conductivity of nanofluids, is included in the analysis. The effective thermal conductivities of the nanofluid predicted by the present study show good agreement with those by models in the literature for the nanolayer with a constant or linear thermal conductivity. The predicted results by the present approach have been confirmed to be consistent with experiments for representative nanofluids such as base fluids of water or ethyleneglycol and nanoparticles of $Al_2O_3$ or CuO to be validated.

• Journal of the Optical Society of Korea
• /
• v.16 no.3
• /
• pp.292-298
• /
• 2012

The epitaxial layer structures for blue InGaN light emitting diodes have been optimized for high brightness applications with the output power levels exceeding 1000 $W/cm^2$ by using a self-consistent finite element method. The light-current-voltage relationship has been directly estimated from the multiband Hamiltonian for wurtzite crystals. To analyze the efficiency droop at high injection levels, the major nonradiative recombination processes and carrier spillover have also been taken into account. The wall-plug efficiency at high injection levels up to several thousand $A/cm^2$ has been successfully evaluated for various epilayer structures facilitating optimization of the epitaxial structures for desired output power levels.

• Proceedings of the IEEK Conference
• /
• 2003.07b
• /
• pp.775-778
• /
• 2003

In this paper, we report our quantum mechanical approach for the analysis of FinFET in a self-consistent manner. The simulation results are carefully investigated for FinFET with an electrical channel length(Leff) of 30nm and with a fin thickness(Tsi) of 10～35nm. We also demonstrated the differences in the simulations for the classical and quantum-mechanical simulation approaches, respectively. These simulation results also imply that it is necessary to solve the coupled Poisson and Schrodinger equations in a self-consistent manner for analyzing the sub-30nm MOSFETS including FinFET.

• Proceedings of the KIEE Conference
• /
• 1993.07b
• /
• pp.1280-1282
• /
• 1993

We investigated theoretically the current-voltage characteristics of resonant tunneling diodes with a single quantum well structure, using a self-consistent method. This method is a numerical analysis which is able to include the effects of the undoped spacer layer and the band bending by charge accumulation and depletion on the contact layers, so that it is better suited to explain experimental results. The structure used is an $Al_{0.5}Ga_{0.5}$As/GaAs/$Al_{0.5}Ga_{0.5}As$ single quantum well. In this work, we estimate the theoretical current-voltage characteristics, and then, the dependence of the current-voltage curves on the thickness of undoped spacer layers.

• Proceeding of KASS Symposium
• /
• 2008.05a
• /
• pp.89-94
• /
• 2008

This paper deals with the method of self-equilibrium stress mode analysis of cable dome structures. From the point of view of analysis, cable dome structure is a kind of unstable truss structure which is stabilized by means of introduction of prestressing. The prestress must be introduced according to a specific proportion among different structural member and it is determined by an analysis called self-equilibrium stress mode analysis. The mathematical equation involved in the self-equilibrium stress mode analysis is a system of linear equations which can be solved numerically by adopting the concept of Moore-Penrose generalized inverse. The calculation of the generalized inverse is carried out by rank factorization method. This method involves a parameter called epsilon which plays a critical role in self-equilibrium stress mode analysis. It is thus of interest to investigate the range of epsilon which produces consistent solution during the analysis of self-equilibrium stress mode.

• Proceedings of the Korean Vacuum Society Conference
• /
• 2010.02a
• /
• pp.314-314
• /
• 2010

The design of the blanket and shield play a key role in determining the size of a reactor since it has an impact on the various reactor components. The blanket should produce enough tritium for tritium self-sufficiency and the shield should provide sufficient protection for the superconducting TF coil. Neutronic optimization of the blanket and the shield is necessary, and we coupled the system analysis with a neutronic calculation to account for the interrelation of the blanket and shield with the plasma performance of a reactor system in a self-consistent manner. By using the coupled system analysis code, the operational space for a low aspect ratio (LAR) tokamak reactor with a superconducting toroidal field (TF) coil is investigated with an spect ratio in the range of 1.5 - 2.5. The minimum major radius which satisfies all the physics and engineering requirements increases with the magnetic field at the magnetic axis. A required inboard shield thickness is mainly determined by the requirement on the protection of the TF coil against radiation damage. It is shown that to have a fusion power bigger than 3,000 MW in the LAR tokamak with a superconducting TF coil, a major radius bigger than 4.0 m is required.

• The Transactions of the Korean Institute of Electrical Engineers C
• /
• v.51 no.9
• /
• pp.397-407
• /
• 2002

A new simulator which predicts the quantum effect in NMOSFET structure is developed. Using the self-consistent method by numerical method, this simulator accurately predicts the carrier distribution due to improved calculation precision of potential in the inversion layer. However, previous simulator uses analytical potential distribution or analytic function based fitting parameter Using the developed simulator, threshold voltage increment and gate capacitance reduction due to the quantum effect are analyzed in NMOS. Especially, as oxide thickness and channel doping dependence of quantum effect is analyzed, and the property analysis for the next generation device is carried out.

• Survey Research
• /
• v.11 no.2
• /
• pp.123-140
• /
• 2010

The purpose of this study is to determine the unidimensionality of Grasmick's operationalization of Gottfredson and Hirschi's criminality inducing the concept of low self-control. By applying confirmatory factor analysis procedures that incorporate advances in the application, the proposed six factor model and two alternative models were examined suggesting that Grasmick's low self-control scale actually contains 6 distinguishable factors, not a single factor. The factors identified to be consistent with the six-factor model were impulsivity, simple tasks, risk seeking, physical activities, self-centered, and temper.

• Journal of Digital Convergence
• /
• v.11 no.10
• /
• pp.313-320
• /
• 2013

In this study of tourism destination brand equity and self-consistent interstellar significant attachment relationships and brand equity and behavioral intention was to determine the effect on the relationship. First, the tourism destination brand equity of the self-consistent sex tourists will have a significant impact is to test the hypothesis of a multiple regression analysis was conducted brand equity, loyalty, self image and gender matched only indicates the relationship was significant. Second, self Correspondence tourist destination tourists will have a significant effect on attachment. In order to verify the hypothesis that the multiple regression analysis was conducted for self-Correspondence attachment was significantly related shows. Third, the attachment of tourist destinations for travelers of action also will have a significant impact on. Hypotheses multiple regression analysis was conducted to attachment behavior also shows significant relationship was about.