Effect of indium composition ratio on solution-processed nanocrystalline InGaZnO thin film transistors

Byung Du Ahn, Hyun Soo Shin, Woong Hee Jeong, +2

Applied Physics Letters

Materials ScienceElectrical EngineeringEngineeringNanotechnologyNanoelectronics +11

Improvement in policy and proactive interconnection procedure for renewable energy expansion in South Korea

Sehyun Kim, Hyunjae Lee, Heejin Kim, +5

Renewable and Sustainable Energy Reviews

Distributed Energy SystemElectrical EngineeringRenewable Energy ExpansionEngineeringSmart Grid +8

On Droop Control of Energy-Constrained Battery Energy Storage Systems for Grid Frequency Regulation

Jae Woong Shim, Gregor Verbič, Heejin Kim, +1

IEEE Access

Operating Region of Modular Multilevel Converter for HVDC With Controlled Second-Order Harmonic Circulating Current: Elaborating P-Q Capability

Heejin Kim, Sang Min Kim, Yong-Ho Chung, +3

IEEE Transactions on Power Delivery

Electrical EngineeringPower EngineeringEngineeringDc MicrogridsEnergy Management +8

Performance Testing of Mobile Applications at the Unit Test Level

Heejin Kim, Byoungju Choi, W. Eric Wong

Performance TestingEngineeringSystem TestingProgram AnalysisTest Process Improvement +13

Exploiting Redundant Energy of MMC–HVDC to Enhance Frequency Response of Low Inertia AC Grid

Heejin Kim, Jaesik Kang, Jae Woong Shim, +5

IEEE Access

Electrical EngineeringRedundant EnergyEngineeringSmart GridEnergy Management +13

On Exploiting Active Redundancy of a Modular Multilevel Converter to Balance Reliability and Operational Flexibility

Jaesik Kang, Heejin Kim, Hong-Ju Jung, +4

IEEE Transactions on Power Electronics

EngineeringPower Electronics ConverterElectric Power ConversionPower ElectronicsReliability Engineering +15

Threshold voltage control of InAlN/GaN heterostructure field-effect transistors for depletion- and enhancement-mode operation

Suk Soon Choi, Heejin Kim, Zachary Lochner, +5

Applied Physics Letters

SemiconductorsWide-bandgap SemiconductorElectrical EngineeringSemiconductor DeviceEngineering +10

Performance testing based on test-driven development for mobile applications

Heejin Kim, Byoungju Choi, Seok-Jin Yoon

EngineeringTest Data GenerationSoftware EngineeringSoftware AnalysisSoftware Performance Testing +15

Amount of sympathetic sprouting in the dorsal root ganglia is not correlated to the level of sympathetic dependence of neuropathic pain in a rat model

Heejin Kim, Heung Sik Na, Backil Sung, +1

Neuroscience Letters

Pain SyndromeSympathetic DependenceHealth SciencesNeuroanatomySympathetic Nervous System +13