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In the present paper, we examine the parameterization of all robust stabilizing Internal Model Controllers (IMCs) for multiple-input/multiple-output plants with uncertainties. The parameterization problem is the problem in which all stabilizing controllers for a plant are sought. Since this parameterization can successfully search for all proper stabilizing controllers, it is used as a tool for many...
This paper proposes a magneto-dielectric metasubstrate (MDM) for a microstrip patch antenna (MPA). A miniaturization MPA with miniaturization factor of 2.33 and radiation efficiency of 87% is designed, numerically tested, fabricated and measured. The results of the simulation and measurement are in good agreement. Furthermore, we propose the advantage of MDM, in comparison with dielectric and magnetic...
In this paper, we present a compact thin-film ultrawideband (UWB) antenna with round corner rectangular slot and partial circular patch. A CPW-fed rectangular slot with a fork-like tuning stub radiates through a rectangular aperture, which ensures UWB impedance matching from 2 GHz to 11.6 GHz for S11 < −10 dB. This antenna is printed on Mylar® Polyester Film substrate with size of 60×53.3...
In implantable stimulators, a current-controlled stimulation is preferred over a voltage-controlled due to its safety. However, the power efficiency is a major disadvantage. By reducing the headroom voltage needed in the current driver, power efficiency of a constant current stimulation is improved. A promising technique is to bias the transistor in triode region whereas improving output impedance...
Effects of 3-kJ.kg−1 nanosecond pulsed electric fields on activities of Salmonella enterica and Staphylococcus aureus were observed through batch treatment experiments. The results showed different responses in bacterial inactivation depending on pulse durations (30 and 500 ns) and bacterial strains. The response to longer pulse treatments of S. enterica showed a higher significance in bacterial inhibition...
A dc to dc multilevel modular capacitor clamped converter (M2C3) with electrical grounding isolation and bidirectional power flow for a dc microgrid application is proposed in this paper. The principle of this particular M2C3 is based upon volt-sec balance of capacitors connected as a modular cell in the circuit so that the M2C3 can be similarly operated as a dc transformer. The M2C3 can be interfaced...
This paper presents a compact ultrawideband monopole antenna with 5.5 GHz notched band. By inserting V-shaped slit into the patch of UWB antenna, the notched band is obtained. The V-shaped slit length corresponds to a half guide wavelength of center frequency of band notch. The proposed antenna can rejects the frequencies from 5.3 GHz – 5.65 GHz, resulting in avoidance of electromagnetic interference...
Listening to a lecture in a classroom is a common process for studying in Thailand. Ability of learning is affected by the ability of hearing the instructors' speech. Acoustical environments of the classroom, hence, can influence speech intelligibility. In this research, acoustical parameters, reverberation time, listeners' locations in classrooms and their effects were studied. By using an assumption...
If a pulse frequency, a load resistance of an LLC current-resonant DC-DC converter are changed, the dynamic characteristics is varied greatly, that is, the LLC current-resonant DC-DC converter has non-linear characteristics. In many applications of DC-DC converters, loads cannot be specified in advance, and they will be changed suddenly from no loads to full loads. A DC-DC converter system used a...
Many classification techniques are originally designed to solve a binary problem, but practically many classification problems involve more than two classes. A multiclass problem can be decomposed into binary sub-problems, each solved by a binary classifier. Aside from using one-against-one (OAO) or one-against-all (OAA) decomposition scheme, an ensemble of binary classifiers be constructed hierarchically...
This paper proposes a new color image watermarking scheme based on coefficients modification in LL sub-band. Basically, the blue component of original color image is decomposed by the Discrete Wavelet Transform (DWT) to obtain the coefficients in LL sub-band in order for embedding a single watermark bit with a tuned constant value to achieve the optimum watermark strength. To extract this embedded...
Gas sensors based on carbon nanotube (CNT)/ polymer nanocomposite were fabricated by a fully inkjet-printing method. The CNT/polymer layers acting as sensing layer were prepared by 2 methods; (i) deposition of separated layer of CNT and polymer to form a composite-like structure at the interface and (ii) deposition of blend CNT and polymer to obtain completely composite layer. Difference of sensor...
This paper presents low power CMOS full adder cells. The full adder cells are utilization to low power by using XOR and XNOR gate architectures with pass transistor logic and transmission gate. All simulation results have been carried out by using HSPICE program simulator based on 22 nm CMOS technology at 1.2 V supply voltages. The operating frequency is 250 MHz. In comparison with other 1 bit adder...
Falls are a common and an often serious problem in elderly people. The simple and effective way to prevent falls is regular exercises without requiring any weight at home. In order to promote the daily-life exercises in elderly people, the exercise recognition system based on surface electromyography (EMG) signals is presented. This research aimed to evaluate features extracted from four lower-limb...
This paper presents the compensating current control of shunt active power filter using space vector PWM. The synchronous detection method is used to calculate the reference currents for shunt active power filter. The control strategy of shunt active power filter using PI controllers on dq frame is also presented in the paper. The simulation results for the harmonic elimination show that the source...
This paper presents the study on lightning impulse breakdown voltage of nitrogen and air by the variation of gap distance, pressure and humidity in rod-plane gap. The range of gap distance is 5–35 mm; pressure 2–5 bars; relative humidity 35%, 60% and 82%, both positive and negative polarities. According to the results, the breakdown voltage of both gases is increased with gap distance, pressure and...
The radio frequency identification (RFID) tags are proposed to be employed as remotely read dielectric-property sensors to determine qualities of some construction material products (CMPs); e.g., light weight concrete (LWC), mortar specimens and concrete. This paper presents a study of the characteristics of an RFID tag mounted at several locations on the LWC. The numerical simulations are performed...
Various unsupervised clustering algorithms have been used to infer population structure in genetic data. The goals are to separate individuals of similar genetic characteristics into clusters and to estimate the number of clusters within each dataset. Among them, a framework called iterative pruning principal component analysis (ipPCA) have been developed. It performs PCA iteratively on subsets of...
Pattern matching has became a bottleneck of software based Network Intrusion Detection System (NIDS) as the number of signature have recently increased dramatically. Many FPGA-based architectures for detecting malicious patterns have been proposed recently. However, these approaches have just considered matching pattern separately while more and more complex combination of several patterns are utilized...
Boolean satisfiability problem (SAT) is an NP-complete decision problem for determining whether there exists a variable assignment making a Boolean expression satisfiable (TRUE). SAT has been the cornerstone for various Computer Engineering applications. Numerous algorithms for solving SAT exist with varying degrees of completeness and complexity. A class of SAT algorithms based on stochastic local...
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