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Many challenges have been investigated in the past few years to make network communications more secured, more reliable, scalable, standardized, and higher performance. Implementations of these researches vary, taking into consideration several features of embedded system design, such as cost, flexibility, performance, and size. Embedded system cores for network communication are becoming much important...
In order to be viable for use in communication and radar systems, wideband beamforming requires the calculation of filter coefficients to be performed quickly so as to avoid undesirable latency in the system. This paper provides a quick introduction to the method of least-squares wideband beamforming and discusses the use of General Purpose computation on Graphics Processing Units (GPGPU) for acceleration...
The eikonal partial differential equation is solved using a modified level set algorithm which is then transformed into a proposed field programmable gate array implementation. The numerical method for isotropic material eikonal hardware engines is extended to angle dependent anisotropic media in two dimensions. This new method transforms the eigenvalue iteration into a process which executes in constant...
With the shift from desktop/laptop computers to multi-touch mobile devices (e.g. iPad, Smartphone, Tablet handheld), these mobile devices have become a part of everyday life and have potentials to promote in-class activities between teachers and students. In this paper, we have developed mobile learning applications for the Google's Android and Apple's iOS platforms to be used in electrical engineering...
This is a report on our evaluation of Robotis' Bioloid robotic systems for their use in a senior-level engineering robotics course. We had found that Robotis had provided robust embedded C and LabView libraries that we were able to intermix, adapt and extend for our needs in sensor and actuator interfacing, especially in ZigBee applications to create a mobile wireless sensor network whereas the PC...
This short paper describes a Master's program design to meet the educational demand for body parts making, both from physiological and non-physiological nature (prostheses). The paper gives a new definition of an organ to allow both types of human body parts. It also introduces the concept of Engineered Physiology in the educational system.
A novel unit cell and analysis are presented for a metamaterial with effective negative permittivity. The structure consists of two disks connected by a central post, and the analytic approach directly provides the electromagnetic field coupling to the resonant structure. By using Ampere's circuital law in the development, the electromagnetic field effects are directly coupled to the resonant behavior...
In this paper, we propose a method to detect and eliminate the streaking artifacts, present in Feldkamp-David-Kress (FDK) based 3D cone-beam tomography, by comparing and combining two synthetic data sets. The data sets, which are 3D reconstructed volume data, are created from the original and negative of the X-ray projections of 3D Sheep-Logan model. The 2nd data set, created from the negative of...
Robotic simulators, frameworks, and related toolkits are very important in today's research community. The need to accurately simulate movements, algorithms, and interactions with the real world is quickly becoming a major research focus as humans and robots interact in more situations and differently than ever before. This is a survey of popular robotics simulators and some of the main frameworks...
This paper deals with the problem of adding and placing phasor measurement units (PMU) to achieve power system observability. A new algorithm that minimizes the number of added PMUs with minimum number of channels is proposed. The proposed algorithm is tested using different power systems. The solution provided by the algorithm outperforms existing algorithms in terms of number of PMU channels required...
For evaluating the first swing stability (FSS) of power systems in the presence of doubly fed induction generator (DFIG) wind farms, a simple and unified model of DFIG is proposed in this paper. In addition the proposed DFIG model is carefully incorporated into the power system for fast FSS evaluation. The evaluation algorithm is also presented in details in the paper. Without losing generality, DFIG...
Network centrality indices are quantification of the fact that some nodes/edges are more central or more important in a network than others. Different centrality indices are suitable for different applications, but most of them have structural significance and require that the network be connected. Most centrality measures are only definitions and there hasn't been much work done in measuring the...
The pull-out frequency of a 2nd-order Type II Phase Lock Loop (PLL) is a very important parameter in many applications. It quantifies the ability of a phased-locked PLL to track an abrupt jump at the input reference frequency. This parameter also gives a qualitative idea about the convergence region of the PLL without a cycle-slip. This paper compares the pull-out frequency of two different kinds...
Photovoltaic systems are being considered as one of the major sources of electrical energy for next decades. The cost of PV cells is decreasing more and more and this will help increase its penetration in power systems. One of the main issues of PV systems is their dependency on irradiance of the sun and temperature of the cells. As during day-time both these factors are changing continuously, the...
This paper presents modeling methods for overhead transmission lines with segmented shield wires, as well as signal attenuation calculation for different coupling methods for use in power line carrier (PLC) systems. The purpose of this paper is to present a generalized method to model transmission lines with segmented shield wires, along with steps for signal attenuation calculation in the phase domain...
Finding the behavior of application programs has been studied by many researchers to improve the performance. Especially, reuse distance, number of distinct data element between two adjacent references to a data element, has been studied by many researchers since reuse distance is independent of hardware architecture configurations. However, with the advent of multicore architectures, predicting the...
Reliability-aware logic synthesis can be used to mitigate a circuit's response to radiation-induced soft errors. This paper analyzes the impact of using reliability-aware logic synthesis to reduce both the pulse width and the drain area of a circuit. Using our targeted cell library, several benchmark circuits were analyzed to identify equivalent, less-vulnerable implementations while minimizing penalties...
In this paper, we propose a new preemptive scheduling algorithm which belongs to a new family of real-time service oriented scheduling problems. As the complementarity of our previous non-preemptive algorithm, real time tasks are scheduled preemptively with the objective of maximizing the total utility this time. Different from the traditional utility accrual scheduling problem that each task is associated...
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