Sanghoon Lee

ORCID: 0000-0002-4851-097X
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About
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Research Areas
  • Gas Dynamics and Kinetic Theory
  • Computational Fluid Dynamics and Aerodynamics
  • Innovation and Knowledge Management
  • Plasma and Flow Control in Aerodynamics
  • Organic Electronics and Photovoltaics
  • Rocket and propulsion systems research
  • Heat Transfer and Optimization
  • Geothermal Energy Systems and Applications
  • Perovskite Materials and Applications
  • Conducting polymers and applications
  • Graph theory and applications
  • Particle Dynamics in Fluid Flows
  • Molecular Junctions and Nanostructures
  • Advanced Sensor and Energy Harvesting Materials
  • Geometric Analysis and Curvature Flows
  • Diamond and Carbon-based Materials Research
  • Space Satellite Systems and Control
  • Digital Marketing and Social Media
  • Intellectual Property and Patents
  • Nonlinear Partial Differential Equations
  • Customer Service Quality and Loyalty
  • Advanced Statistical Process Monitoring
  • Functional Equations Stability Results
  • Innovation Diffusion and Forecasting
  • Belt Conveyor Systems Engineering

Korea Advanced Institute of Science and Technology
2012-2024

Daejeon University
2021

Sejong University
2021

Technology Management Economics Society
2012-2015

Jeonju University
2012

Kootenay Association for Science & Technology
2001

Kyungnam University
1991

Since the introduction of corporate social responsibility (CSR), it has become an important duty companies and organizations. In addition, academic industry researchers have attempted to explore effects on firm performance. To this end, study examined how service quality are notably associated with customer satisfaction behavioral intention use by employing a structural equation modeling method. A research model nine constructs was introduced findings revealed that economic, social,...

10.3390/su70912106 article EN Sustainability 2015-09-01

The concepts of corporate social responsibility (CSR) and user experience have been identified as core determinants the success service providers. Accordingly, practitioners researchers investigated effects providers’ CSR on behavioral intention to use a particular service. Based importance these concepts, current study integrates subjective dimensions with technology acceptance model (TAM) explore whether efforts mobile telecommunication services providers their customers significant We...

10.3390/su70811345 article EN Sustainability 2015-08-20

With the emergence of smartphones, paradigm mobile ecosystem has changed rapidly. In particular, global firms focus on technological competition when jostling for market position in recognition strategic need to secure a strong platform. this paper, we analyse network structure knowledge flows ecosystems using US patent citation information. We find that two subsectors, platform providers and application software providers, are at centre exchange activity play brokerage role as key mediator....

10.1080/09537325.2015.1096336 article EN Technology Analysis and Strategic Management 2015-10-15

We report inverted small molecular organic solar cells using a doped window layer as an optical spacer. The spacer was used to shift the field distribution inside active layers, generating more charge carriers from sunlight. In this report, N,N,N′,N′-tetrakis(4-methoxyphenyl)-benzidine (MeO-TPD) with 2,2-(perfluoronaphthalene-2,6-diylidene)dimalononitrile (F6-TCNNQ), p-type dopant material. P-doped MeO-TPD adopted because it has large energy band gap, and its conductivity can be increased by...

10.1039/c4nr05425c article EN Nanoscale 2014-11-03

10.1007/s42405-019-00185-2 article EN International Journal of Aeronautical and Space Sciences 2019-06-18

In this study, stagnation-point heating and ablation analysis of the orbital re-entry experiment (OREX) are performed including air gas mixture. gas–gas interactions, is ejected into shock layer, interaction between gases fully considered. The two-temperature model employed to describe thermochemical nonequilibrium flows OREX flight conditions. state-of-art chemical-kinetic parameters 19-species, carbon-related species, assessed utilized calculate flows. gas–surface three types models,...

10.1063/5.0057473 article EN Physics of Fluids 2021-08-01

A thermochemical nonequilibrium analysis was performed under the low enthalpy shock-tunnel flows. quasi-one-dimensional flow calculation employed by dividing calculations into two parts, for shock-tube and Mach 6 nozzle. To describe of flows, a three-temperature model is proposed. The treats vibrational O2 NO separately from single energy mode previous two-temperature model. In model, electron-electronic energies N2 are grouped as one mode, O2, O2+, another mode. results flows calculated...

10.1371/journal.pone.0240300 article EN cc-by PLoS ONE 2020-10-07

Wall partial pressure dependence analysis of oxygen surface catalytic recombination efficiency on copper-coated is experimentally performed in a shock tube at room temperature. Three flow conditions with different enthalpy gas mixture that contains 21% and 79% argon are considered. The determined based the stagnation heat transfer measurement end-wall tube. A platinum thin-film gauge used to determine total transfer. An additional silicon dioxide-coated thin film applied measure conductive...

10.1016/j.csite.2021.101600 article EN cc-by-nc-nd Case Studies in Thermal Engineering 2021-10-28

We report enhanced internal quantum efficiency and absorption of parallel-like bulk heterojunction small molecular organic solar cells by inserting multi-functional layers (MFLs). The inserted MFL has an energy level between main donor acceptor levels, assisting exciton dissociation the charge transfer state transport from active to electrodes. Furthermore, two donors having complementary spectra yield higher broader efficiency. When a ClAlPc:C60 layer was as on CuPc:C60, short circuit...

10.1063/1.4821441 article EN Applied Physics Letters 2013-09-16

Three force measurement techniques in a shock tunnel, the free-flight, movable-support balance, and stress-wave balance were employed, each technique's characteristics assessed. For technique, system setup, data processing method, uncertainties, applied range of test model size-flow establishment time described detail compared. comparison discussion, drag coefficients circular pointed cone with semi-angle 18.4° at nominal freestream Mach number 6 measured. As result, three yield similar...

10.1371/journal.pone.0270743 article EN cc-by PLoS ONE 2022-07-08

To achieve highly efficient organic photovoltaics, control of the molecular orientation is one prime important factors, for interfacial dipole and energy offset at donor/acceptor interface influence device performance.

10.1039/d0tc04895j article EN Journal of Materials Chemistry C 2021-01-01

The effect of the surface catalycity on effective radius a blunt body geometry in hypersonic flow is numerically investigated. defined terms with variation both nose and corner radius. Five different types configurations are considered, that range from flat-faced to complete hemisphere geometry. chosen investigated for four conditions levels enthalpy. obtained by comparing stagnation heat transfer spherical To compute given configuration, two-dimensional computational fluid dynamics (CFD)...

10.1016/j.csite.2022.102085 article EN cc-by-nc-nd Case Studies in Thermal Engineering 2022-05-05

Knowledge of ground thermal properties is most important for the proper design large BHE(borehole heat exchanger) systems. Thermal response tests with mobile measurement devices were first introduced in Sweden and USA 1995. have so far been used primarily insitu determination data BHE systems, but also evaluation grout material, exchanger types water effects. The main purpose has to determine values effective conductivity, including effect ground-water flow natural convection boreholes. Test...

10.3795/ksme-b.2006.30.8.764 article EN Transactions of the Korean Society of Mechanical Engineers B 2006-08-01

10.1016/j.ijheatmasstransfer.2022.123731 article EN International Journal of Heat and Mass Transfer 2022-12-15

Purpose The Fay and Riddell (F–R) formula is an empirical equation for estimating the stagnation-point heat flux on noncatalytic fully catalytic surfaces, based assumption of equilibrium. Because its simplicity, F–R has been used extensively reentry flight design as well ground test facility applications. This study aims to investigate uncertainties F-R by considering velocity gradient, chemical species at boundary layer edge, thermochemical nonequilibrium (NEQ) behind shock under various...

10.1108/hff-01-2022-0051 article EN International Journal of Numerical Methods for Heat &amp Fluid Flow 2022-05-18

In this paper, we establish Liouville-type theorems for a one-parameter family of elliptic PDEs on the standard upper half-plane model hyperbolic space, under specific geometric assumptions. Our results indicate that Euclidean is only compactification space when scalar curvature compactified metric has designated sign.

10.48550/arxiv.2401.06623 preprint EN other-oa arXiv (Cornell University) 2024-01-01

This paper proposes an unmanned aerial vehicle (UAV) equipped with a rigid contact module and two supplementary forward-direction motors, designed for the contact-based inspection of porcelain insulators. During free-flight, this robot is controlled by geometric tracking controller. When approaching contacting insulators, impedance controller generates enough force to sustain using while maintains its orientation. platform validated through simulations, demonstrating effectiveness in...

10.1109/iceic61013.2024.10457221 article EN 2020 International Conference on Electronics, Information, and Communication (ICEIC) 2024-01-28

Although the formulation of technology policies focusing on university is a topic that has been well-discussed in academia, more analytic researches have not yet developed. Especially, characteristics and source R&D funding take critical roles for academic to be commercialized. This study aims investigate differences depending sources - private or governmental formulate research policy based empirical results. From qualitative perspective, we visualize two-mode networks by linking patent...

10.1109/ieem.2012.6837835 article EN IEEE International Conference on Industrial Engineering and Engineering Management 2012-12-01
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