Hyunskim Kim

Abstract The current study proposes and tests a theoretical model of the relationship among service outcome quality, interaction quality, peer-to-peer quality, and customer experience quality, and the impact of customer experience quality on customer loyalty. The findings indicate that service outcome quality, interaction quality, and peer-to-peer quality perceptions significantly influence customer experience quality, which, in turn, influences customer loyalty. Furthermore, the findings show t

This paper presents a 10-bit column driver IC for active-matrix LCDs, with a proposed iterative charge-sharing based (ICSB) capacitor-string that interpolates two output voltages from a resistor-string DAC. Iterative mode change between a capacitive voltage division mode and a charge sharing mode in the ICSB capacitor-string interpolation suppresses the effect of mismatches between capacitors and that of parasitic capacitances; thus, a highly linear capacitor sub-DAC is realized. In addition, th

Abstract The fourth KSTAR campaign in 2011 concentrated on active edge-localized mode (ELM) control by various methods such as non-axisymmetric magnetic perturbations, supersonic molecular beam injection (SMBI), vertical jogs of the plasma column and edge electron heating. The segmented in-vessel control coil (IVCC) system is capable of applying n ⩽ 2 perturbed field with different phasing among top, middle and bottom coils. Application of an n = 1 perturbed field showed a desirable ELM suppress

This paper presents a source-driver IC that actively compensates for inter-channel charging rate mismatch in an active-matrix organic light-emitting diode (OLED) display with ultra-thin bezel panel. Due to the limitation of the physical design, the resistances of the driver-to-column routing lines in the panel bezel differ across channels. To solve the luminance non-uniformity caused by resistance mismatch, a digitally controlled gm-degeneration technique embedded in the output buffer amplifier

This paper presents a direct photon-counting X-ray image detector with a <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex Notation="TeX">${\rm HgI}_{2}$</tex> </formula> photoconductor for high-quality medical imaging applications. The proposed sampling-based charge preamplifier with asynchronous self-reset enables a pixel to detect single X-ray photon energy with higher sensitivity and faster processing rate. The use of

A mutual-capacitive multi-touch sensing technique is presented, especially for ultra-thin active-matrix organic light-emitting diode (OLED) display panels. The proposed scheme recognizes touch positions by detecting LC oscillation frequency shift. The signal feedback to the common cathode electrode of OLEDs cancels out the effects of parasitic coupling capacitances. In addition, the ground-floating-based scanning method enables a multi-touch function. The proposed touch sensor was implemented in

To achieve high image quality in mobile active-matrix LCDs, higher DAC resolution and good channel-to-channel uniformity are required in column-driver ICs. In conventional column-driver ICs, the resistor-DAC (R-DAC) architecture has been generally used due to its uniform characteristic, because each R-DAC in driver channels shares a common resistor string for gamma reference-voltage generation. Furthermore, nonlinear gamma correction can be easily implemented using a nonlinear resistor-string th

In this paper, a daily activity monitoring system for Internet of Things (IoT)- assisted living in home area networks is proposed in order to provide care for elderly people who live alone. The proposed system consists of two main parts: an IoT-assisted living space with contactless activity sensors, a help trigger, and an emergency gateway and a daily activity monitoring server with a range of components including data collection, event and user management, activity analysis and reporting, and

The IMM based tracking algorithm requires the many number of sub-models in order to have a good performance with respect to the various target maneuvering. But it is not reasonable to use the algorithm, which has more computing resource, in real system application. Therefore, we need the algorithm which has less computing resource as well as good performance. To solve this problem, we propose a fuzzy interacting multiple model algorithm (FIMMA) for a maneuvering target tracking, which use the mi

IP address lookup is an important function to meet such requirements as high speed, memory size and low power for the overall performance of the routers. The biggest problem of IP address lookup is that prefixes has a variable length so that longest prefix match should be employed for IP address lookup. Binary search is useful to decrease search times. But binary search is only adaptable to an exact match. Prefix range search proposed the method binary search can be extended for the longest pref