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This paper discusses the potentiality of reconfiguring distribution networks into islanded Microgrids to reduce the network infrastructure reinforcement requirement and incorporate various dispersed energy resources. The major challenge would be properly breaking down the network and its resultant protection and automation system changes. A reconfiguration method is proposed based on allocation of...
Multi-mode road watch radar system has been designed and implemented for the obstacle collision avoidance on the highway. This paper gives an overview of RWR system and shows the operation of the system as well as several results. The system operation modes are traffic monitoring and collision avoidance. The algorithms of traffic monitoring are MTI, CFAR, FFT, angle estimation, and tracking. IMTI,...
A modeling framework that considers inventory-distribution coordination and consignment stock policy is proposed. The model is applied to determine the optimal stock policy and examine the potential benefits of consignment stock policy. Numerical results show consignment stock policy is profitable and leads to inventory consolidation.
UHF method is one of the well-known PD measurements and has been applied widely to PD diagnostic system of gas insulated switchgears (GISs). Recently, UHF method is also being applied to power transformers. This paper presents the UHF sensor for PD diagnosis of power transformers. To measure the PD inside of a power transformer, the UHF sensor is mostly mounted inside the oil drain valve of exterior...
Dissolved gas analysis(DGA) is one of the most widely used diagnostic tools to detect and evaluate faults in power transformers for a long time. IEEE Guide C57.104 and IEC Publication 60599 recommend several DGA diagnostic methods used for utilities and most of them are available to classify the different types of faults using gas ratios or %gas. However, the task of DGA interpretation is not easy...
In this paper, Smith-Purcell effect, which utilizes metallic grating and electron bunches, was investigated for a new device of terahertz (THz)-wave generation. Femtosecond electron bunches induced multimode THz-wave at a frequency of <0.7 THz.
This paper presents an ultrasonic sensing based human face identification approach. As a biometric identification method, ultrasonic sensing could detect the geometric structure of faces without being affected by the illumination of the environment. Multi ultrasonic sensors are used for data collection. Continuous Transmitted Frequency Modulated (CTFM) signal is chosen as the detection signal. High...
4F2 selector-less crossbar array 2Mb ReRAM test chip with 54nm technology has been successfully integrated for high cell efficiency and high density memory applications by implementing parts of decoders to row/column lines directly under the cell area. Read/write specifications for memory operation in a chip are presented by minimizing sneak current through unselected cells. The characteristics of...
The thermal dynamic influence of microstructure and physical phase leading to the variation on the short-circuit density (Jsc) for the large size of CIGS solar cell has been investigated by the subsequent rapid thermal annealing (RTA) and optical and electrical analyses, respectively. The annealing temperature of 300°C is an optimized point for a high efficiency of 11.75% to a 125 × 125 mm2 cell....
To avoid mutual interferences and detection confusion, orthogonal waveforms are usually employed for multiple-input multiple-output (MIMO) radar. In this paper, we apply chaos to design orthogonal waveforms for MIMO radar. Chaotic phase coded waveforms are generated, which are further optimised for obtaining good correlation performance of low sidelobe level. A sidelobe suppression method with complementary...
This work presents the development of an inertial switch employing stimuli-sensitive hydrogel integrated with a passive inductor/capacitor (LC) resonator. The device consists of a glass substrate with capacitor plates and an inductor coil, and a PDMS microfluidic chip with micro-channels and micro-cavities containing hydrogel and water droplet. When the acceleration exceeds the designed threshold-level,...
A plug-and-play CD-like platform is used to perform a statistical detection of Platelet Derived Growth Factor (PDGF) proteins through aptamer-based surface functionalization of microcantilevers. When PDGF proteins bind to the aptamers, the cantilevers deflect. This deflection is monitored by optical readout heads from a DVD-ROM. The improved sensing platform facilitates measurements in continuous...
This paper reports the results of using graphene as a novel electrode material in the experiment of electrowetting on dielectric (EWOD). The device has a Teflon layer coated CVD graphene electrode which is patterned on transparent and flexible substrates such as PET films. By applying a potential difference between a liquid droplet and a graphene electrode, we observed a change in contact angle from...
Deep UV LED structures with UV transparent design, highly reflective p-electrodes and die encapsulation exhibited peak external quantum efficiencies up to 5%. Modeling indicates further increases in efficiency through reduced defect-related nonradiative recombination.
This paper provides a discussion on future direct current (DC) network development in terms of system protection under DC-side fault scenarios. The argument between appropriate DC circuit breaker and new DC fault-tolerant converters is discussed after a review on DC technology development and bottleneck issues that require proper solutions. The overcurrent/cost curve of power-electronic DC circuit...
In this paper we describe a novel design methodology for fabricating chemical sensing platforms by utilising well-established inexpensive technologies. In our approach, the sensing site and the active part of the transducer are designated as two separate entities, facilitating the use of a multitude of sensing membranes and/or supporting substrates as well as the employment of discrete off-the-shelf...
This paper presents a super low power MICS band receiver front-end down converter on 65 nm CMOS for Bionic Eye or other implantable biomedical devices. This down converter, including a low-noise amplifier (LNA) and a quadratrue mixer, consumes a mere 500-µA DC current under 1-V supply. With a small differential local oscillation (LO) swing of 300 mV, it provides a voltage conversion gain of 34 dB...
In this paper, we present the design of a social robot, Nancy, which is developed as a platform for engaging social interaction. Targeting for a social, safe, interactive and user-friendly robot mate, the design philosophy of Nancy is presented with mechanical, electrical, artificial skin and software specifications. In particular, there are 32 degrees of freedom (DOFs) through the whole body of Nancy,...
We report our discovery of a new process to produce composite carbon nanotubes (CNT) fibers from single-walled carbon nanotubes (SWNTs), multi-walled nanotubes (MWNTS) or the combinations thereof utilizing already an adhesive (polymer) coated layer on polyethylene terephthalate (PET) film strip by simply applying CNT coating on the layer followed by an acid dipping. We also found that applying either...
A novel ethanol sensor using three-dimensional single-walled carbon nanotube networks (3D-SWNTs) built on silicon pillars with the use of an alkaline solution electrolyte has been developed. A cyclic voltammetry was used to examine the electrochemical response of the sensor. The relationship between response currents and ethanol concentrations was found to be linear for the ethanol concentrations'...
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