Bongkoo Kang

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Background: To evaluate the usefulness of dynamic and delayed magnetic resonance (MR) imaging in the T-staging of stomach cancer and to compare the enhancement pattern of the cancerous lesion and the normal wall. Methods: We performed MR imaging in 46 patients with stomach cancer (including four early gastric cancers and 42 advanced gastric cancers). Axial,(More)
Article history: Received 11 September 2015 Received in revised form 16 December 2015 Accepted 10 January 2016 Available online xxxx This paper proposes amethodwhich can separate the parasitic effect from the drain current Id vs. gate voltage Vg curves of MOSFETs, then uses this method to analyze degradation of experimental pMOSFETs due to(More)
This paper presents a distributed circuit model of the cold cathode fluorescent lamps (CCFLs) in the backlight units (BLUs) of liquid crystal displays (LCDs). This model consists of nonlinear resistors and parasitic circuit elements, and it can be used to simulate CCFL BLUs for various input waveforms using standard circuit simulators. The nonlinear(More)
Enhanced degradation of n-MOSFETs with high-k/metal gate stacks under CHC/GIDL alternating stress is investigated. CHC stress generates negative oxide charges while GIDL stress generates positive oxide charges in the gate oxide near drain region. Theses oxide charges degrade device reliability, and degradation is enhanced when CHC stress and GIDL stress are(More)
Channel width dependence of mechanical stress effects on a nanoscale n-channel metal–oxide-semiconductor field-effect transistor using the shallow trench isolation (STI) is investigated. The results indicate that the mechanical stress induced by the STI enhances mobility, off currents, and the impact ionization significantly. 841 MPa of tensile stress is(More)
This paper proposes a method of controlling external electrode lamps (EEFLs) for local dimming of liquid crystal displays (LCDs). In the proposed method, each EEFL is divided into four partitions using external electrodes formed on the outer surface of the lamp. The luminance is controlled by varying the duration of ac power applied to the center electrode(More)