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In this paper, we try to recognize negative emotions (sadness and disgust) of human affecting driving by using physiological signals that are commonly used to deal with human emotions. To do this, emotional stimuli are used to induce sadness and disgust, and emotion recognition is performed based on the feature vector extracted from the physiological signals collected on the induced emotion by a stimulus...
Recently, attempts have been made to change the paradigm of existing plants by applying ICT to the manufacturing industry. It can be seen as an extension of factory automation, which used to automate production facilities and unmanned work in the past, but Smart Factory is an advanced model to predict and respond to the future situation. In this paper, we propose a controller that is optimized for...
This paper presents a wireless counting system used for product management in factory. Compared to wire network system, wireless system is cost-effective solution for installation and maintenance. Proposed counting system detects target product which figure of top part is not flat due to protruded plastic wrap and position on conveyor belt is varied. Wireless sensor node includes three distance measuring...
Cognitive femotcell networks can opportunistically access the licensed spectrum to enhance spectrum utilization. However, interference management plays a crucial role to effectively utilize the spectrum. In this paper, we consider the joint resource allocation and power control problem for an uplink transmission for a network consisting of a licensed macrocell and multiple cognitive femtocells. Furthermore,...
In this paper, a novel video error concealment algorithm is presented for HEVC in wireless IP networks. More specifically, motion vector estimation is performed based on residual errors and block reliability. Then, mismatch errors along block boundary are calculated for reducing blocky effects along the block boundary. In the proposed approach, a downhill simplex approach is adopted for fine-tuning...
In this paper, we demonstrate an ACF-packaged ultrathin Si-based flexible NAND flash memory by adopting a simple method, without using a conventional transfer process. By gently etching the bottom sacrificial silicon of the SOI wafer, flip-chip bonded devices were sufficiently thinned down (roughly to 1 μm) to fabricate highly flexible, fully packaged Si-based NAND flash memory, without any cracks...
This paper proposes an active islanding detection method for the BESS (Battery Energy Storage System) with a three-phase inverter which is connected to the unbalanced AC grid. The proposed method adopts the DDSRF (Decoupled Double Synchronous Reference Frame) PLL (Phase-Locked Loop) so that the independent control of positive-sequence and negative-sequence current is successfully carried out using...
This paper presents an parking assistance system based on wireless sensor networks technology to reduce the wire harness in vehicle. This wireless sensor networks system consists of two types of sensor nodes which one measures the distance using ultrasonic sensor and another monitors the ECU information from OBD. Sensor node for measuring distance to obstacles operates the detection process twice...
In this paper, we develop the base-station platform for in-vehicle wireless sensor network system. The base-station platform is a component of in-vehicle wireless sensor network system which includes wireless sensor nodes platforms, an OBD (On-Board Diagnostics) module, and a user device (e.g., smart-phone, head-unit, and navigation). The in-vehicle wireless sensor network system applies wireless...
This paper designs and develops the communication interface between base-station and user device (e.g., smart-phone, smart-pad) which are components of the wireless automotive sensor network system. The wireless automotive sensor network system provides a variety of driver assistance information for drivers by using wireless sensor network technologies. The communication interfaces are needed to provide...
Organic-inorganic hybrid perovskite solar cells have emerged as a leading renewable energy technology in photovoltaic. Despite many advantageous in perovskite solar cells, the perovskite absorbing layer quality was not uniform such crystallinity, surface coverage. Here we report a novel fabrication method using UV O2 plasma process by controlling the surface reactivity for high crystallinity perovskite...
Multi-spectral imaging (MSI) and its analysis methods were investigated to determine end-point of photothermal damage of tissue. MSI revealed denatured porcine tissue after irradiation of laser with irradiance lower than photothermal damage threshold.
Here we present detailed transmission measurements of ex-vivo lens capsule from 40,000 cm−1 to 800 cm−1. Time-dependent measurements were also performed to eliminate water absorption.
Lateral resolution and depth discrimination in turbid samples was measured with optical resolution photoacoustic microscopy (ORPAM) and compared to confocal microscopy (CM). ORPAM signal strength and CM resolution were relatively less affected by scattering.
This paper proposes an operational improvement of MMC (Modular Multilevel Converter) with redundancy SMs (sub-modules) by a new scheme of NLC (Nearest Level Control), which can offer reduction of voltage harmonics and switching loss. The feasibility of proposed scheme was verified through computer simulations with PSCAD/EMTDC software. Based on simulation results, a hardware prototype of 10kVA, DC-1000V...
We report that noise level was reduced by passivating WSe2 field effect transistors (FETs) with high-k dielectric material. Low frequency noise and I-V characteristics of the device were measured from WSe2 FETs before and after the passivation with ZrO2 to confirm the effect of passivation by high-k dielectric material. As a result, there was no significant change in the I–V characteristics. In the...
In this paper, a novel video error concealment technique is presented. More specifically, for IP-based in-vehicle wireless networks, a robust video error concealment technique is proposed based on residual errors and boundary matching approach. Residual errors are used for checking reliability of motion vectors of coding units and a boundary matching algorithm is used for maintaining smoothness in...
In this paper, we develop vehicular base-station for wireless parking assistance system. We introduce in-vehicle wireless sensor network system which can provide the convenience/safety-related services by applying wireless sensor network technology. We develop wireless parking assistance system to verify usefulness and effectiveness of the in-vehicle wireless sensor network system. The wireless parking...
In this paper, we study on the vehicular wireless basestation for in-vehicle wireless sensor network system. We introduce in-vehicle wireless sensor network system applying wireless sensor network technologies. The in-vehicle wireless sensor network system greatly consists of the vehicular wireless base-station, vehicular wireless sensor nodes, and wireless OBD (On-Board Diagnostics) module. Here,...
Vehicular telematics such as car navigation systems, traffic information systems, and location-based systems (LBS) are getting popular. However, contents for vehicular telematics are generated by multiple contents providers and their data formats are not compatible. Thus, it is difficult to integrate or exchange contents, e.g., navigation maps, traffic information, points of interest (POI), etc.,...
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