EM dampers, generally called regenerative dampers, consist of permanent magnets and coils. The electromagnetic force due to the relative motion between the coil and the permanent magnet can be used to control the vibration of the structure. Dampers have the competence of allowing semi active regulatory of the gesture of a system of interest like coil mechanism. Due to the possessions of the fluid, dampers have the capability to differ damping force in real time by much less liveliness than the fully active systems. Classification of the dampers has been done using separate, constant standards of current to regulatory of the output force.

Read More...

An automated smart shopping system is formed by introducing the concept of IoT to connect all items in the grocery shop. In this system, an inexpensive RFID tag is embedded within each product. When the product is placed into a smart cart, the product detail is automatically read by the cart equipped with an RFID reader. Hence, billing is made from the shopping cart itself preventing customers from waiting in a long queue at checkout. Also, expiry date of the product is displayed and the damaged products can be identified with respect to its weight. Thus, expired and damaged products will not be considered for bill calculation. In addition to that, smart shelving is added to this system by introducing RFID readers that can monitor stock, perhaps updating a central server. Thus, inventory management becomes easier. Finally, the checkout points can validate the purchase made by a client. A prototype of a smart shopping system is also presented in this paper.

Read More...

Rapid development of VLSI design, the logic gates and arithmetic circuits plays important role in signal, image, video and microprocessor applications. A challenging problem in hardware design is to develop hardware efficient, high speed and low power design. Multiplication is one of the arithmetic operations for such applications. Most of the existing multipliers satisfy single requirement, but the time delay and power consumption are very essential requirements for such applications. In this paper, we propose an approximate reconfigurable (AR) multiplier obtained by scaling the input operands. The objective of proposed AR multiplier is to enhance the speed and power consumption at the price of low hardware cost. The scaling logic is used to compute the least significant part of the result is kept in a steady state, as the adders input do not change; the switching activity of this logic is 0, while the unfrozen part of the adder still has a switching activity. Moreover, AR multiplier with the n-bit operation is designed by the canonical signed-digit (CSD) technique for reducing number of adders/shifters in the design. The implementation of the proposed AR multiplier is evaluated by comparing it is performance with state-of-art multipliers in terms of hardware utilization, maximum clock frequency and power consumption.

Read More...

Today’s competitive market required to optimize Weight and Volume of the gear design. Weight and Volume optimization of gear pairs is difficult to solve because it includes various objectives and large number of variables. Therefore, to solve such difficulty robust optimization technique will be useful to get optimal solution. Genetic algorithm will be useful to solve such difficulty using MATLAB. In this work a helical gear pair design optimization problem is solved. It is a multi-variable, complex non-linear problem with derived objective function and constraints. The objective is to minimize the volume of the gear. The design parameters considered are module, face width, number of teeth on drive and driven and helix angle. Results indicate that GA algorithm gives the best results for all design variables and objective function in helical gear design.

Read More...

The fast development of mixed media applications has joined basic significance to advanced example acknowledgment and recovery methods. We propose a computerized watermarking strategy for image pattern confirmation. Image authentication systems have as of late increased extraordinary consideration because of its significance for a substantial number of sight and sound applications. Advanced images are progressively transmitted over non-secure channels, for example, the Internet. In this way, military, medicinal and quality control images must be secured against endeavors to control them; such controls could alter the choices dependent on these images. To secure the legitimacy of interactive media pictures, a few methodologies have been proposed. These methodologies incorporate ordinary cryptography, fragile and semi-fragile watermarking and computerized marks that depend on the image content. Computerized watermarking is a cutting edge innovation of concealing data inside some advanced media: for example, content, picture, video, or sound records. It was produced as of late as another strategy for copyright assurance. Strategies are ordered by the administration they give, that is strict or specific verification, tamper discovery, restriction and recreation abilities and heartiness against various desired images handling activities. The point of this paper is to show the strategies for rising watermarking procedures for image authentication.

Read More...

Social media and Social Network Analysis (SNA) acquired a huge popularity and represent one of the most important social and computer science phenomena of recent years. One of the most studied problems in this research area is influence and information propagation. The aim of this paper is to analyze the information diffusion process and predict the influence (represented by the rate of infected nodes at the end of the diffusion process) of an initial set of nodes in two networks: Facebook user’s contacts users commenting these post. These networks are dissimilar in their structure (size, type, diameter, density, components), and the type of the relationships (explicit relationship represented by the contacts links, and implicit relationship created by commenting on post), they are extracted using Node XL tool. Three models are used for modeling the dissemination process: Linear Threshold Model (LTM), Independent Cascade Model (ICM) and an extension of this last called Weighted Cascade Model (WCM). Networks metrics and visualization were manipulated by NodeXL as well. Experiments results show that the structure of the network affect the diffusion process directly. Unlike results given in the blog world networks, the information can spread farther through explicit connections than through implicit relations.

Read More...

This paper are conclude by speed control of squirrel cage 3- phase induction motor by 3-phase AC voltage controller along with SPWM technique, AC controllers are thyristor based devices, which convert fixed alternating voltage without a change in the frequency. SPWM (Sinusoidal PWM) is a type of “carrier-based” pulse width modulation. In sinusoidal PWM, the modulation signal is sinusoidal, with the peak of the modulating signal always less than peak of the carrier signals. The AC voltage controller are makes use of line commutation and as such no complex commutation circuitry is required in this controller. The controller of the easy to comparison of the other controller. The main application of this model is winders, fan drives, domestic pumps, industrial heating and lighting control. Simulation is carried out by using MATLAB and programming for firing of SCR is done by using MALTAB simulink model.

Read More...

Conventional power system includes four major sections, bulk generation, transmission network, distribution network, and loads. The main converter in the conventional electric grid is the low frequency passive transformer providing galvanic isolation and voltage regulation for various voltage zones. In this configuration, small-scale renewable energy resources are connected to the power system at low voltage zones or inside micro-grids. Nowadays the electrical main grid is managed in AC due to several reasons derived from the past. Recent years have experimented a rapid evolution of power electronic components able to dramatically enhance the effectiveness of the active and reactive power flow management. To investigate Community Energy Storage impacts on Volt-VAR Optimization (VVO) solutions for advanced distribution networks. It is one of the technologies employed to improve system stability, reliability and quality. This research introduces the application of the Multi-Port Solid State Transformer (MPSST) as an effective tool to support grid voltage at distribution level while integrating distributed energy resources. The solid state transformer replaces the conventional transformer between two voltage zones of distribution systems. Matlab/Simulink environment is used to simulate and test system with an MPSST. The simulation results prove the effectiveness of the MPSST supporting the distribution system at local level in a fast and efficient manner in response to disturbances caused by load variations.

Read More...

Pollution has a major role in depleting air system. The health risks of air pollution are extremely serious. The Internet of Things (IOT) is the interconnection of uniquely identifiable embedded computing devices within the existing Internet infrastructure. The IOT concerns the connection of physical devices (cars, thermostats, smart phones, home lighting, tide sensors, smart meters, etc.) to the Internet. There are more devices connected to the Internet than people on the planet, and the prediction is that there will be 50 billion IOT devices by 2020.In previous papers, to integrate sensors with cloud computing and IOT, other authors have opted for ZigBee hybrid network connected to a Wi-Fi or Ethernet gateway. The main objective of this paper is to implement IOT to measure the pollution of public transports using MQ-135 Raspberry PI which is sensitive for Carbon Monoxide. Global Positioning System (GPS) is implemented in Raspberry PI which would find the location of the transport vehicle. The amount of Carbon Monoxide emitted is sensed once in (say 20km) and also the locality of vehicle is used for finding the area which is polluted the most. These are then integrated to the Amazon Cloud IOT which is more securable and many services of AWS can be used along with it. This would enable a Simple Notification Service (SNS) to the mobile phone when the vehicle is causing higher level of pollutants.

Read More...

Cementitious materials (especially concrete) are the most common construction materials used worldwide. However, cementitious materials are generally brittle and have very low tensile strength and strain capacity. Macroscopic steel reinforcement bars are commonly used to improve the strength and ductility of this type of material, but in recent decades extensive research on the effects of micro- and macro fibers in controlling the growth of cracks in cementitious materials has been carried out. The concept behind such a transition to fiber-reinforced cement (FRC) is that the resulting tensile strength is developed from many individual fibers rather than a few pieces of steel. While microfibers may delay the nucleation and growth of cracks on the micro scale, nano reinforcement would delay the nucleation and growth of cracks on the nano scale. If nano scale cracks can be successfully controlled, their propagation to the micro level would be prevented. Recently, carbon nanostructures such as carbon nanotubes (CNTs, both single and multi-walled), carbon nano fibers (CNFs), and graphene have attracted attention from many concrete researchers because of their exceptional mechanical, chemical, thermal, and electrical properties, and good performance as polymeric reinforcement materials. This project presents the results of an experimental investigation of graphene oxide on mechanical properties of concrete. This article aims to find out the optimum quantity of graphene oxide required to achieve maximum compressive, tensile and flexural strength of concrete. Graphene oxide was added to the concrete in five mix proportions. Graphene oxide content were varied by 0.025%, 0.05% & 0.075% of cement content. To check durability of concrete cubes cured in acid solution for the age of 7 and 28 days.

Read More...

This study is intended to explore the bonding and hydrological performance of the plastic coated aggregate used permeable pavement. The surface infiltrates storm water, reduce peak flows, filter and clean contaminants and promote ground water recharge. The safe disposal of plastic is the most challenging issue for the solid waste management across the globe. It could be worth experimental the use of plastic waste in concrete to overcome the dual issue of shortage of raw material and safe disposal of plastic waste. For this an experimental stud was carried out with two different mix proportion of concrete (water cement ratio 1:2 AND 1:4) and plastic waste at a dosage of 15% and 25% by volume. Thus, the plastic waste is effectively used in permeable pavement of concrete.

Read More...

The paper is based on Internet of things(IoT) for health monitoring and tracking system for soldiers. The GPS is used for transmitting location of Soldier to the base station. These health parameters and location are transmitted to base station using IoT. Using these information we can save valuable soldiers life.

Read More...

People have been working seriously in the search for best alternative fuels to safeguard the environment ever since the transportation and industrial fields started growing widely. Among such alternatives acetylene has proved to be a better fuel for internal combustion engines due to its low cost, simplicity in manufacturing and excellent combustion characteristics. Moreover it has less carbon content compared to other fuels, which plays a central role in environmental degradation. However the fuel must be safe and environmentally friendly and also readily usable in existing engines without any significant design modifications. Acetylene is produced in parallel to the engine operation taking proper care to avoid back firing. We propose in the present study that acetylene be the safe and appropriate fuel for engine in terms of Computational Analysis. It is concluded that acetylene could be the better alternative fuel without compromising brake thermal efficiency and safe operation with a moderate increment of smoke and NOx.

Read More...