Statistics of Electromagnetic Noise Due to High-Voltage Power Lines

The impulsive noise caused by a 275-kV transmission line has been measured at 80, 150, and 480 MHz and the results are presented in the form of graphs of the amplitude probability distribution (APD), average level crossing rate, and pulse width (PWD) and pulse-interval distributions (PID's). It is concluded that the noise decreases as the monitoring frequency increases and as the moniitoring antenna is moved away from directly beneath the line. The character of the noise also changes, noise bursts being much less apparent at higher frequencies.     

Erucic acid ameliorates the lipopolysaccharide-induced memory deficit in rats through inhibited inflammation cytokines expression/caspase 3/NF-κB pathways

Erucic acid is a single unsaturated fatty acid that falls under the omega-9 fatty acid family. It was suggested to treat Wistar rats with lipopolysaccharide (LPS)-induced memory impairment and minimize cognitive impairment. A total of 30 animals were randomized: group I was normally treated group, group II was administered with LPS, group III was treated with LPS along with erucic acid at the dose of 10 mg kg^–1 p.o.^–1, group IV was treated with LPS along with erucic acid at 20 mg kg^–1 p.o.^–1 and group V was the erucic acid per se group provided at the dose of 20 mg kg^–1 p.o.^–1 per se. Behavioral tests were evaluated by using the Morris water maze and Y-maze. Biochemical analysis including acetylcholine esterase (AChE), choline acetyltransferase (ChAT), glutathione (GSH), catalase activity (CAT), superoxide dismutase (SOD), and nitric oxide (NO) along with proinflammatory mediators tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β), caspase 3, and neuroinflammatory biomarker (nuclear factor kappa B-NF-κB) were measured. Erucic acid produced substantial behavioral improvement in the Y-maze test, including spontaneous alterations and reduced latency time during acquisition, and a longer duration of time in the consolidation phase undergoing the MWM test. Furthermore, erucic acid improved the AChE, proinflammatory markers, and oxidative stress as well as restoring endogenous antioxidant levels, ChAT, caspase 3, and NF-κB levels. Erucic acid may be a therapeutic component for conditions related to memory disorders such as memory impairment, enhances memory functioning, and protects against neuronal damage.     

Histological,transmission electron microscopic,and immunohistochemical study of the adrenal gland in the Persian squirrel (Sciurus anomalus)

This research was aimed to present the histological and ultrastructure properties of the adrenal gland in the Persian squirrel. Two male and female animals were included in the study. The adrenal gland was bean-shaped and located on the cranial pole of kidney. The enveloping capsule was dense connective tissue that reacted positively with Periodic-Acid Schiff (PAS) and Masson trichrome stainings. The parenchyma of the gland consisted of two-part, namely cortex and medulla; the cortex had three layers: zona glomerulosa (ZG), zona fasciculata (ZF), and zona reticularis (ZR). The cells of the ZG were mainly spherical and ovoid with circular arrangement and few lipid droplets in TEM micrographs. The cells of the ZF were columnar and spherical that were arranged in cord-like rows. Transmission electron microscopy (TEM) indicated conspicuous lipid droplets and mitochondria in this zone. The cells of the ZR were arranged in a tangled networks and were almost similar to those in the ZF. TEM images showed fewer lipid vesicles in the ZR compared to the ZF and ZG. Chromaffin cells were located in the medulla of the adrenal gland in two layers. TEM images showed that some of them were smaller and contained fewer secretory granules; other cells were larger and contained more electron-dense secretory granules. Immunofluorescence staining showed that steroidogenic factor 1 (SF1) expressed from cortex to the corticomedullary junction (CMJ) and tyrosine hydroxylase (TH) expressed in the medulla. In conclusion, the results indicated both similarities and differences between the adrenal gland of the Persian squirrel and other animals such as mammals and rodents.     

Feature fusion based on joint sparse representations and wavelets for multiview classification

Pattern Analysis and Applications - Feature-level-based fusion has attracted much interest. Generally, a dataset can be created in different views, features, or modalities. To improve the...     

Guest Editorial: Special Issue on Advances in Signal Processing Systems

Journal of Signal Processing Systems -     

Performance of Data-Rate Analysis of Massive MIMO System Using User Grouping

Wireless Personal Communications - The major challenges in massive MIMO networks are to increase the system throughput and capacity with low complexity and reliability of the wireless communication...     

Electrical Resistivity of Titanium Diboride and Zirconium Diboride

The electrical resistivities of hot-pressed samples of Ti_{1- x} Zr _x B₂ ( x = 0.0, 0.3, 0.5, 0.7, 1.0) were measured by a four-point ac technique over the range 298 to 1573 K in an argon atmosphere. The hot-pressed samples for the intermediate compositions were found to be mixtures of two solid-solution phases. The resistivities for all compositions were found to increase linearly with temperature and can be described by ρ( T ) =ρ₂₉₈+φ( T - 298). The room-temperature resistivity ρ298 (μΩ cm) and the temperature coefficient of resistivity φ (nΩ·cm/K) for ZrB₂ were determined to be 7.8 and 10, both of which increase with the content of TiB₂. These values for TiB₂ were determined to be 20.4 and 36, respectively.     

Sedimentation behavior of mixed solid particles

During the material relocation phase of core-disruptive accidents in sodium-cooled fast reactors, the sedimentation behavior of fragmented debris discharged from the reactor core into the lower plenum region leading to a debris-bed formation is crucial in regard to in-vessel retention and safety concerns. The height of the beds formed may influence both the cooling of the bed from the decay heat in the fuel and the neutronic characteristics. To develop an experimental database of bed formation behavior, a series of experiments using simulant materials, namely, Al₂O₃, ZrO₂, and stainless steel, were performed under gravity-driven discharge of solid particles from a nozzle into a quiescent cylindrical water pool. The bed height was measured for particles of different size, density, and sphericity, and an injection nozzle with varying diameter, injection velocity, and injection height. From these experiments, an empirical correlation was established to predict the bed height for both homogeneous and mixed particles for the different properties. This correlation reproduces reasonably well the experimental trend in bed height with critical factors, which were identified in this and previous experiments.     

The Development of a Robust ANFIS Model for Predicting Minimum Miscibility Pressure

Miscible gas injection has been considered one of the most important enhanced oil recovery techniques. Minimum miscibility pressure (MMP) is a key parameter in the design of an efficient miscible gas injection project. This parameter is usually determined using a slimtube apparatus in the laboratory. However, many attempts have been made to introduce MMP predicting correlations. In this study an adaptive neuro-fuzzy inference system (ANFIS)–based correlation has been developed to estimate the MMP values. In this model, the MMP of reservoir fluid is correlated with 27 variables containing concentrations of different components in reservoir oil and injecting gas, molecular weight and specific gravity of C₇ ⁺ in reservoir oil and also reservoir temperature. This correlation can be applied to predict the effect of each individual parameter on the MMP values.     

Design of NS3 VLC module and performance analysis of ad hoc network under VLC and Wi‐Fi layers

Visible light communication (VLC) is the branch of optical wireless communications that uses light‐emitting diodes for the dual purpose of illumination and very‐high‐speed data communication. The main motivation behind the current work is finding alternatives to the saturated radio frequency spectrum, radio frequency security issue, and vulnerability to interferences. The current work is aimed at developing a module for the physical layer of a VLC‐based ad hoc network in network simulation 3. The VLC physical layer module is developed by using the optical signal modules available in the network simulator. The work also includes modelling of VLC‐based transmitter, wireless optical channel, and the optical receiver. Furthermore, the implementation and evaluation of the VLC‐based physical layer is carried out over a typical ad hoc network under different performance metrics. The designed ad hoc network is also tested under Wi‐Fi module followed by its comparison with corresponding ad hoc network under VLC module. The comparison is based on bit error rate curves, system throughput, and gain in received signal‐to‐noise ratio mainly. Finally, the suitability of different modulation schemes is also investigated in the current work for both Wi‐Fi– and VLC‐based ad hoc networks.