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Sulphur hexafluoride (SFó) gas insulated switchgear (GIS) is widely used in electrical power supply system and therefore needs regular preventive maintenance. In this research work, a reliable and effective diagnostic technique was used to detect SFó byproducts caused by partial discharge (PD) occuring as a result of more that one defect, named as a hybrid defect. A 0.2-MPa presurrised coaxial chamber...
Rapid economic developments have forced power networks and pipeline networks to share the same pathway. Induced voltages and currents appear on pipelines running parallel with high voltage transmission line when the transmission line is hit by lightning strike. In this study, a simulation had been carried out to determine the first lightning stroke effect on an underground pipeline coating stress...
Gas insulated switchgear assumes an indispensable equipment for high voltage transmission of electrical energy because of its focal points of high unwavering quality and execution, smaller in measurements and extraordinary compatibility with the environment. It utilizes sulphur hexafluoride gas as its insulant and coolant in view of its high dielectric quality and superb circular segment extinguishing...
A reliable diagnostic technique of Gas insulated switchgear condition monitoring is used in this research for the detection of Sulphur hexafluoride gas (SF6) decomposition products due to its high sensitivity and anti-electromagnetic interference; it is known as decomposition by-product method. A simulated coaxial decomposition chamber was designed and used to simulate the decomposition of SF6 under...
In this paper, demonstration of failure recovery mechanism was conducted employing nodes developed in Software Defined Network. SDN allows programmability inside a network by providing adaptability towards advancement variation policy usage, as vendor specific policy building confines dynamic application building. In Node failure Recover, first mechanism is Bellman Ford Algorithm (shortest path algorithm)...
Cognitive Radio (CR) is an innovative approach based on Software Defined Radio (SDR) that utilizes frequency spectrum efficiently to accommodate large number of users. Fast & fine spectrum sensing (to determine available free spectrum) is the primary objective in CR systems. Spectrum sensing is effected by multipath and shadowing which are the major hindrances in wireless communication; there...
Scripture under sight is defining the robustness and functionalities of ventilator which is not only easily transferable as well as it is very low cost and economics friendly. It is designed under the basic idea of being incorporated in huge human catastrophes in poorly resources enriched environments. Ventilator under the proposed design was being developed with wooden pieces with a weight of 6 kg...
This paper presents a novel architecture for ternary content-addressable memory (TCAM), using G-AETCAM cells, which outputs the address of the provided input data. The proposed architecture is a matrix of G-AETCAM cells arranged in the form of rows and columns using flip-flop as a memory element and a control logic circuitry consisting of logic gates. One G-AETCAM cell encodes the input and stored...
Millimeter waves (MMWs), operating at 30–300 GHz band, are very promising to the next-generation 5G wireless communication systems, enabling data rates of multi Gbps per user. Photonic technology is increasingly considered to play a key role in a wide range of MMW devices, modules, and subsystems that are essential to successfully build next generation MMW-based 5G networks. This work considers the...
Pressing demands of accuracy, repeatability, reliability and productivity in today's robotic applications has highlighted significance of modern control techniques. This research proposes two non-linear design techniques, Model Predictive Control (MPC) and H-infinity control for a six Degree Of Freedom (DOF) robotic arm. The derived dynamics of the manipulator based on Euler Lagrange formulation is...
This paper proposes a critical survey of crowd analysis techniques using visual and non-visual sensors. Automatic crowd understanding has a massive impact on several applications including surveillance and security, situation awareness, crowd management, public space design, intelligent and virtual environments. In case of emergency, it enables practical safety applications by identifying crowd situational...
Huge volume of content is produced on multiple online sources every day. It is not possible for a user to go through these articles and read about topics of interest. Secondly professional articles, blog and forum have many topics discussed in a single discussion. Automatic knowledge-based topic models is a recent approach in Natural Language Processing that extract high quality topics from a large...
This paper discusses speed control performance of a proposed hybrid fuzzy-fuzzy controller (HFFC) in a variable speed induction motor (IM) drive system. With respect to finding the rule base of the fuzzy controller, a simple genetic algorithm (GA) is employed to resolve the problem of optimization to diminish an objective function, i.e., the Integrated Absolute Error (IAE) criterion. The principle...
We manipulate the phase and amplitude of terahertz waves emitted from graphitic materials by utilizing doping types, work function offsets, and circular transports.
Task allocation is one of the main issues to be addressed in the domain of multi-robot systems, in which it is determined which robot(s) should execute which task(s) so that overall system goal is achieved. Such collective decision making process is of great significance during complex task execution by swarm of simple robots with heterogeneous capabilities. This work targets the issue of coalition...
A low power front-end fully differential operational transconductance amplifier (OTA) has been designed in 65 nm CMOS technology which is suitable to receive low data rates upto 300 kbps for capacitive body coupled communication (BCC) channel. The current shunt current mirror OTA topology has been utilized in open loop configuration in the context of digital baseband architecture on the receiver side...
This paper highlights the digital control problems and issues during the controller design and suggests the solutions to resolve them. For this purpose, digital controller designed on the basis of digital redesign or emulation technique is applied to a buck converter working in continuous conduction mode. Nonlinearities due to the ADC and DAC quantizers, loop-delay, etc. are introduced into the control...
The paper describes the optimization of a discrete-time controller designed on the basis of discrete root locus for the boost converter operating at 1000 kHz. The optimization is accomplished through a nonlinear least squares method. The digital control theory is not as rich as the analog control theory. Locating poles and zeros directly in the z-plane by a designer to render the required performance...
Role based access control (RBAC) is well known due to its high security and ease in management for permissions. But it also has some deficiencies like role structure complexity and having no dynamic behavior. Attribute based access control (ABAC) is a dynamic access control model that provides ease of role structuring. Analyzing roles and permissions after implementing access control model and its...
In this paper a Park's transformation method for the analysis of bearing inner race surface roughness defects is presented. The existing instantaneous power analysis and stator current analysis techniques are unable to diagnose bearing surface roughness defects, due the fact that characteristics defect frequency model is not available for the bearing surface roughness defects. Thus, this paper proposes...
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