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In recent years, nanometal/epoxy resin composites have become the focus of much research because of their wide applications in the electrical industry. Nanocomposites prepared with nano-sized alumina fillers have been shown to have improved dielectric properties e.g. resistance to surface degradation. In our earlier work, we have studied the effect on conduction processes using PDC (polarization-depolarization...
The difference-frequency band of the Kongsberg TOPAS PS18 sub-bottom profiling parametric sonar is very directional. Calibration of this by the standard-target method requires precise positioning and knowledge of target location. This was apparent during the first calibration trial performed on 10 December 2008. The proximity of split-beam transducers of the Simrad EK60/18- and 38-kHz scientific echo...
Cellular communication has explosive growth in recent years. Today millions of people around the world uses cellular phones. Cellular communication is supported by an infrastructure called a cellular network, which integrates cellular phones into the public switched telephone network (PSTN). Location management is one of the main issues in cellular network. A service coverage area of cellular network...
Privacy preserving data mining (PPDM) is a novel research direction to preserve privacy for sensitive knowledge from disclosure. Many of the researchers in this area have recently made effort to preserve privacy for sensitive association rules in statistical database. In this paper, we propose a heuristic algorithm named DSRRC (Decrease Support of R.H.S. item of Rule Clusters), which provides privacy...
Information is valuable asset of any organization which is stored in databases. Data in such databases may contain credit card numbers, social security number or personal medical records etc. Failing to protect these databases from intrusions will result in loss of customer's confidence and might even result in lawsuits. Traditional database security mechanism does not design to detect anomalous behavior...
For many years, the selective emitter approach has been well-known to yield cell efficiencies well above those achieved by conventional screen-printed cells. A simple and effective way of forming a selective emitter can be achieved by laser doping to simultaneously pattern the dielectric with openings as narrow as 8 μm, and create heavy doping beneath the metal contacts. In conjunction with laser...
This paper deals with the development of a System Dynamics Model to study the influence of Production cycle time on: Production start rate, Work in progress, Production rate, Distribution inventory, Distribution rate, and Waste rate. The simulation results indicate that Production cycle time has a significant influence on `Bullwhip Effect' and there may be a need to stretch the Production cycle time...
We developed a method for automated quantification of myocardial perfusion from cardiac magnetic resonance (CMR) images. Our approach uses region-based and edge-based level set techniques for endocardial and epicardial border detection combined with non-rigid registration achieved by a 2D multi-scale cross-correlation and contour adaptation. This method was tested on 66 short-axis image sequences...
Although abnormal motion of the interventricular septum (IVS) caused by elevated right ventricular pressure in patients with pulmonary hypertension (PH) is easy to recognize visually, determination of the severity of PH relies on measurements of pulmonary arterial pressure (PAP). We hypothesized that quantitative 3D analysis of regional IVS curvature throughout the cardiac cycle could be used to differentiate...
ART1 based clustering approach is used for classification, which groups fingerprints into more compact classes. ART1 is a efficient technique for grouping fingerprints in to N number of classes, which speedup the process of fingerprint recognition. After classification of fingerprints the keyfingerprint class is used for the purpose of fingerprint identification. The key-fingerprint is recognized...
This paper proposes a new niching technique for distributed genetic algorithm (DGA). In DGA quick evolution takes place because of independent evolution of subpopulation. To improve performance of DGA care need to be taken for distribution of population in to subpopulations. A proper distribution leads to efficient GA and good solutions. The new technique uses the traditional histogram construction...
Data mining is the discovery of knowledge and useful information from the data stored in large databases. The classification of large data sets is an important problem in data mining. Most data mining algorithms cannot be applied to complex object databases unless it is converted into a single flat table. Much valuable information especially the linkages between objects could be lost by conversion...
This paper focuses on the transmission of real-time fax in IP networks. Itpsilas been some time now that expressions like ldquoVoice over IPrdquo, ldquoFax over IPrdquo and the likes are heard extensively in the telecommunications industry. The idea is utilizing data networks to deliver telecommunications services which are presently provided by the PSTN. The incentive is pretty straightforward: cutting...
Todaypsilas systems are more complex and need higher performance. To accomplish this, systems include more hardware compared to software. This increases the use of FPGAs in modern systems because of its reconfiguration capabilities. FPGA contains many hardware components, which are utilized to perform operations directly in hardware. There are two problems related to this issue, first is high performance...
Data compression algorithms are used to reduce the redundancy and storage requirement for data. Data compression is also an efficient approach to reduce communication costs by using available bandwidth effectively. Over the last decade we have seen an unprecedented explosion in the amount of digital data transmitted via the Internet in the form of text, images, video, sound, computer programs, etc...
Analysis of functional neuroimaging data in the studies of human brain has become very critical in understanding neuro-degenerative diseases such as Alzheimer's disease (AD). The most common approach in AD neuroimaging studies has been of univariate nature, where individual brain regions/voxels are analyzed separately. In many cases these techniques prove to be effective. However, they could not shed...
Presently, the optimization concept plays an important role in the problems related to engineering management and commerce etc. Recent trends in optimization, points towards the genetic algorithm and evolutionary approaches. Different genetic algorithms are proposed, designed and implemented for the single objective as well as for the multiobjective problems. GAS3 [2006] (Genetic Algorithm with Species...
A multi-mission approach to solving the same problems for various projects is enticing. However, the multi-mission approach leads to the need to develop a configurable, adaptable and distributed system for meeting unique project requirements. That, in turn, leads to a set of challenges varying from handling synchronization issues to coming up with a smart design that allows the ldquounknownsrdquo...
Recent advances in cellular mobile communications have touched every aspect of our lives. In mobile computing, mobile hosts or mobile terminals (MTs) move randomly from one place to another within a well-defined geographical area. To provide timely services to mobile users, a challenging task is to track the location of the mobile user effectively so that the connection establishment delay is low...
A stable dispersion of micron size magnetite spheres in a ferrofluid exhibits several interesting magnetically induced effects like zero forward scattering, enhanced backward scattering etc. Here we show that at a critical magnetic field the dispersion inhibits propagation of certain optical frequencies. The field required to induce this photonic band gap is quite moderate and the technique can be...
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