Improvement of Voltage Profile and Loss Reduction Using Optimized Soft Computing Based Capacitor Placement Methodology

Significant exploration has been done on the arrangement of ideal capacitor arranging in the appropriation frameworks for the assignments of power factor adjustment, voltage profile improvement and misfortune decrease. Particularly, mechanical plant with variable load conditions has huge inductive loads and its power factor is exceptionally poor. These ventures advantage most capacitor banks. This bank gives improved power factor, expanded voltage level on the load and lessen the electric service bills. Moreover, programmed capacitor banks might be ready to dispose of kVAr stimulated at light-load periods and bothersome over-voltages. In most cases, the primary motivation behind why a client introduces a capacitor bank is to maintain a strategic distance from punishment in the power bill. Power factor is a proportion of the genuine power to evident power, and speaks to how a lot genuine power electrical gear uses. A power factor of any worth other than solidarity is brought about by inductive or capacitive reactance and harmonics in the circuit [2]. The expansion in power request and high load thickness in the urban zones makes the activity of power frameworks muddled. To fulfill the load need, the framework is required to extend by expanding the substation limit and the quantity of feeders. Notwithstanding, this may not be handily accomplished for some utilities because of different requirements. Along these lines, to give more limit edge for the substation to fulfil load need, framework misfortune minimization procedures are utilized. In addition, the impact of electric power misfortune is that heat energy is dispersed which builds the temperature of the related electric parts and can bring about protection disappointment. By limiting the power misfortunes, the framework may secure longer life expectancy and have dependability that is more prominent. Different techniques have been utilized to decrease power misfortunes financially by ideal choice of size, area and cost of capacitor bank

Temperature dependence of soft mode frequency, dielectric constant and loss tangent of deuterated Rochelle salt crystal

By fitting model values for physical quantities for deuterated Rochelle salt crystal in theoretical expressions for soft mode frequency, dielectric constant and loss tangent derived for Rochelle salt in our earlier studies temperature dependences of these quantities have been calculated. Theoretical results have been compared with experimental results reported in literature, which shows a good agreement. Isotope effects on both transition temperatures have been explained successfully

Structural and Luminescence Properties of ZnO Nanoparticles Synthesized by Mixture of Fuel Approach in Solution Combustion Method

Zinc oxide has been used for many applications, for example optoelectronic devices, ceramics, catalysts, pigments, varistors and many other important applications. In this study, ZnO nanoparticles were synthesized by mixture of fuel approach in solution combustion method. Mixtures of urea, glycine and citric acid were mixed at room temperature with Zinc nitrates as fuels resulting in spontaneous ignition resulting in production of ZnO nanopowder. The crystal structure and size of the synthesized powder were determined by X-ray diffractometer (XRD), which revealed that the synthesized ZnO nanopowder has the pure wurtzite structure having crystallite size 26–40 nm. Optical studies of nanomaterial were examined by FTIR and UV-Visible absorption spectrum. The luminescence studies also investigated in the visible region 360–800 nm with excitation 325 nm laser. These nanomaterials may be used in solid-state lightening devices

Comparative Analysis of Objective Functions in Routing Protocol for Low Power and Lossy Networks

Internet-of-Things (IoT), a new paradigm, has led to the extensive increase in communication among the tiny and embedded network devices. Majority of those devices are power, memory, and energy constrained and are made to work in lossy environments, thus forming an important part of Low Power and Lossy Networks (LLNs). Routing Protocol for Low Power and Lossy Networks (RPL) designed by Internet Engineering Task Force (IETF) is proved to be an effective candidate for routing in such networks. RPL defines the Objective Functions (OFs) in which a set of routing metrics (like hop count, ETX and so on) are used either in an individual or combined manner for optimal path selection between the nodes of the network in terms of various performance factors like power consumed, Packet Delivery Ratio (PDR), reliability and so on. There are two standard Objective Functions- Objective function Zero (OF0) and Minimum Rank Hysteresis Objective Function (MRHOF). The former uses the hop count and the latter uses the Expected Transmission Count (ETX) as the default routing metrics to select the optimal paths. But both of them are single metric Objective Functions (OFs) and have to face various issues regarding the energy consumed, network lifetime and so on. So a number of RPL optimizations incorporating the different routing metrics in a combined way have been proposed to enhance the performance in all respects. This paper gives the comparative analysis of existing Objective Functions that are based on different routing metrics and concludes that the use of a combination of multiple metrics will further improve the RPL performance in future

Temperature dependence of ferroelectric mode frequency, dielectric constant and loss tangent in CsH2PO4 and deuterated CsH2PO4 crystals

The pseudo-spin lattice coupled mode model by adding third- and fourth-order phonon anharmonic interactions and extra spin-lattice interaction term has been considered for CsH2PO4 (abbreviated CDP) and deuterated CsH2PO4 (abbreviated DCDP) crystals. Expressions for shift and width of response function, vibrational normal mode frequency, dielectric constant and loss tangent have been evaluated. Double time temperature dependent Green’s function method has been used for derivation. Fitting the values of model parameters in expressions, the temperature dependence of soft mode frequency, dielectric constant and loss tangent have been calculated. Theoretical results are in agreement with experimental results reported by Blinc et al16

Use of Clustering-based Routing Protocols in Low Power and Lossy Networks � A Survey

Internet of Things (IoT) is the one of the emerging field today, which consists of various resource-constrained devices that are limited in resources and work in the lossy wireless network. Therefore, IoT requires efficient routing protocol so that devices can communicate fast and power efficiently. Among different protocols available for wireless networks, Routing Protocol for Low Power and Lossy Networks (RPL) is a protocol specially standardized by IETF for efficient communication between IoT devices. Routing technique is one of the important factors of a routing protocol, which affects the performance of a protocol. In recent years, researchers contributed to improving RPL performance by providing various solutions and clustering is one of those ways to improve RPL performance by using Cluster- parent based Destination Oriented Directed Acyclic Graph (DODAG). In this paper, we discuss the various clustering-based routing protocols in a Low power and lossy networks (LLNs) and concludes that this survey might be helpful for future researchers

An Efficient Portfolio Management for Trading Under Uncertain Environment

This study presents a framework for efficient portfolio management for trading under uncertain environment. The proposed framework can be used to determine the dominance of various sectors among the chosen set of alternatives. The dominance of these sectors are analyzed by considering various aspects such as Return on equity, Book value per share, Price earnings ratio, and Price to book ratio. For illustration, the dominance of various sectors is evaluated using the proposed framework. The historical stats of various sectors, corresponding to the aforementioned criteria's are collected from various sources and the dominance is studied using the proposed framework. The findings of this study facilitate novice users in understanding the relative dominance of each sector

Self managed Access Scheme for Demand Request in TDM TDMA Star Topology Network

In demand assignment protocol, resources are granted on the basis of demand, governing some rules, policies in resource assignment and after the completion of need, resources are released back to the central pool for further requests. In star topology TDM/TDMA network of VSATs, large number of participating terminals generate signaling packet on common demand request channel. It is desired that these signaling terminals to have higher chances of successful access to the media and at the same time with minimal number of collision over the shared channel. Under these circumstances, performance of media access protocol is really crucial. Aloha is the simplistic technique to access the shared channel but suffers from extremely low throughput. Its immediate successor slotted Aloha improves the throughput by cutting down the vulnerable period to half by agreeing on transmission at slot boundaries. This improvement is also not adequate to provide the better chances of packets getting through when multiple nodes are participating. The large latency network where one hop delay is of the order of 270ms, feedback time and timeouts are also of high order this further worsen the problem. In this paper, we propose self-managed access scheme for demand request that tries to reduce the collision by managing the multiple requests and distributing them over different slots