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Preserving Data Access Control and Security in Cloud for Multi-Organization
Sahana M Beelagi ; Kavitha Juliet
Computer Science and Engineering
Year: 2016, Volume:2, Issue : 12
Pages: 1 - 5
Data access control is an effective way to ensure the data security in the cloud. However, due to data outsourcing and untrusted cloud servers, the data access control becomes a challenging issue in cloud storage systems. Existing access control schemes are no longer applicable to cloud storage systems, because they either produce multiple encrypted copies of the same data or require a fully trusted cloud server. Cipher text-Policy Attribute-based Encryption (CP-ABE) is a promising technique for access control of encrypted data. It requires a trusted authority manages all the attributes and distributes keys in the system. In cloud storage systems, there are multiple authorities co-exist and each authority is able to issue attributes independently. However, existing CP-ABE schemes cannot be directly applied to the access control for multi-authority cloud storage systems, due to the inefficiency of decryption and revocation.
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Experimental Investigation of Heat Transfer through Circular Tube using Al2O3/Water-EG Nanofluid
Bhavinkumar J. Patel ; Mr Dattatraya Subhedar
Mechanical Engineering
Year: 2016, Volume:2, Issue : 12
Pages: 6 - 10
The aim of this study is to investigate the convective heat transfer of alumina oxide nanofluids inside a horizontal circular tube subject to constant and uniform heat flux at the pipe wall. The alumina oxide nanoparticles of about 20 nm diameter are used in the present study. Three volume fractions of 0.2% 0.4% and 0.6% were tested for alumina oxide/distilled water: ethylene glycol (50:50) nanofluids. Experimental results show that the convective heat transfer coefficient of nanofluid is higher than the base fluid at same inlet condition. The heat transfer coefficient of nanofluid increases with an increase in the volume flow rate and volume concentration of the alumina oxide nanofluid. The Nusselt numbers have substantially higher value then the base fluid and it is increase with an increase of the volume flow rate and the particles concentrations. A significant improvement in the Nusselt number (16.18%) was achieved using the nanofluid compared to the base fluid.
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Magnetic Gearing System
YADHU RAJ ; VISHNU M NAIR; LIBIN K VARGHESE; MARTIN VINCENT; DAVIS WILSON
Mechanical Engineering
Year: 2016, Volume:2, Issue : 12
Pages: 11 - 18
With the advent of magnetic gears, researchers have developed a new breed of permanent-magnet machines. These magnetic-geared permanent-magnet machines artfully incorporate the concept of magnetic gearing into the permanent-magnet machines, leading to achieve low-speed high-torque direct-drive operation.Gears and gearboxes are extensively used for speed change and torque transmission in various industrial applications. It is well known that the mechanical gear has a high torque density, but suffers from some inherent problems such as contact friction, noise, heat, vibration and reliability are of great concern. In order to avoid these types of problems we are using magnetic meshing gears. That is the gears are meshed together with the help of magnetic force of attraction without making into contact. By using such kind of gearing systems we can reduce the wear and tear that are commonly seen in mechanical spur gear systems and the magnetic gears works smoothly without any sound and the main advantage of magnetic gearing is it will not get heated as long as it works. Magnetic gearing systems can be used in vehicle transmissions that reduce the friction and improve the efficiency without using any type of additional lubricants. We are using high power rare earth neodymium magnets for the purpose of making gears. Neodymium magnets are powerful magnets which are about 12 times stronger than normal magnets used in speakers.
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Improving Performance of Wireless Sensor Networks using LEGAC
Divjyot Singh ; Deepinder Singh
Electronics & Communication Engineering
Year: 2016, Volume:2, Issue : 12
Pages: 19 - 25
Wireless sensor network (WSN) is still a developing technology with different aspects. It takes attention of many researchers because of its tremendous resources for internet and users. To be able to manage these resources, multiple protocols and algorithms are developed. Energy efficiency is one of the most important research areas of WSNs in the literature. A Wireless Sensor Network is the collection of large number of sensor nodes, which are technically or economically feasible and measure the ambient condition in the environment surrounding them. The difference between usual wireless networks and WSNs is that sensors are sensitive to energy consumption. Energy saving is the crucial issue in designing the wireless sensor networks. In this paper, a modified algorithm for Low Energy Adaptive Clustering Hierarchy (LEACH) protocol is proposed. The modified algorithm proposed is Enhanced Multihop LEACH protocol i.e. LEGAC (LEACH Genetic Ant Colony algorithm); using Genetic algorithm for head selection and Ant Colony algorithm for routing. The network performance depends on the changing energy consumption of the nodes and degree of connectivity of the nodes according to their distance from the base station.
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Experimental and Analytical Investigation to Improve the Efficiency of Industrial Cooling Tower
Uka Sohel Iqbalhusen ; Prof. Piyush Patel; Prof. Amol N. Varade ; Prof. krunal A. Shah; Prof. Ankita B. Pathak
Mechanical Engineering Design
Year: 2016, Volume:2, Issue : 12
Pages: 26 - 31
Cooling towers make use of evaporation whereby some of the water is evaporated into a moving air stream and subsequently discharged into the atmosphere. As a result, the remainder of the water is cooled down significantly.The process parameters such as inlet air rate, water flow rate and fills porosity have more influence on Thermal performance of cooling tower. The Temperature of outlet water is maintained nearest to inlet air wet bulb temperature to obtain the best Thermal Performance of cooling tower. So current work is to obtain and maintaining outlet water Temperature nearest to inlet air wet bulb temperature. The cooling tower fill is the most critical component in the operation of the cooling tower. The function of the tower fill is to provide a maximum contact surface between the water and the air to promote evaporation and heat transfer. Cooling tower fill accelerates the transfer of heat from circulating water by maximizing the contact area between water and air. So inlet water flow rate, inlet air rate and fill porosity are important factor to maintain the outlet temperature of water nearest to inlet air wet bulb temperature.
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E-Business Security towards Customer Perception - An Empirical Study
A. MOHAMED SHAKHEEN ; Dr. C. THIRUMAL AZHAGAN
MBA
Year: 2016, Volume:2, Issue : 12
Pages: 32 - 35
With the rapid increase of the Internet and the World Wide Web {WWW} security has become a key concern of many organizations, enterprises and users. Criminal attacks and intrusion into computer and information systems are dispersion swiftly and they can come from anyplace or universally. The design of the security model and development of the tactic rests on the faith that modern business and technological systems are versatile vibrant systems. Security will then be achieved by focusing on a particular set of security necessities and by securing the business judgment and individual information flows of an e-process. A descriptive study on the systematic approach in e-business security and a methodology for its completion is presented which identify and describes the succession of the phases that should be performed.
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Study on Vermiculite Incorporate in Mortar
M.Gunasekaran ; A.Priyalakshmi; C.Anudevi; H.Premachandar; V.Balamurugan
Civil Engineering
Year: 2016, Volume:2, Issue : 12
Pages: 36 - 42
Exfoliated Vermiculite is a versatile lightweight material and it is used as an calcium silicate boards, roof and floor screeds and insulating concretes, loose fill insulation etc. Study on Vermiculite replacing natural sand is investigated. Design mix having the mix proportion 1:3 with the water cement ratio 0.5. In these specimen the vermiculite is partially replaced by sand at the range of 5%, 10%, 15%, 20%, 25%, and 30% to the total weight of sand. The Superplasticizer Conplast SP430 is added to the samples at a range of 1.5% to the weight of cement. The properties of the mortar such as compression strength, split tensile, water absorption, sorptivity for 28 days of curing were determined.
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Design and Analysis of Material Handling System
Saurabh Gudhate ; Saurabh S. Gudhate; Prabhanjan P. Kulkarni; Praveen K. Mali
Mechanical Engineering
Year: 2016, Volume:2, Issue : 12
Pages: 43 - 52
Material handling systems is used for continuous movement of material from one point to another. They are uncommon in service systems. Material is conveyed everywhere in a factory or warehouse—before, during, and after processing. Material handling work should be minimized without compromising production or the level of quality required of the operation. Material handling operations should be mechanized and/or automated where feasible to improve operational efficiency, increase reaction, improve uniformity and unavoidability, decrease operating costs, and eliminate recurring or potentially unsafe manual labor. The intelligent system approach to selection of conveyor provides advantages of unbiased decision making, greater availability, faster response, and reduced cost as compared to human experts. This paper discuses the design and analysis of material handling system- Conveyor system.
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Design and Static Analysis of Shock Absorber
Karthik A.S. ; Vinaykumar P Ugargol; Manojkumar M Hanumanalli; Vinaykumar B Honakeri; Manjunath S.
Mechanical Engineering
Year: 2016, Volume:2, Issue : 12
Pages: 53 - 55
A shock absorber or suspension system is a mechanical assembly designed to smooth out or damp shock impulse, and dissipate kinetic energy. The shock absorbers duty is to absorb or dissipate energy. In a automobile, it reduces the impact of traveling over rough surface, which leads to improvement in ride quality, and increase in comfort due to substantially decreased amplitude of disturbances. When a automobile is moving on a level road and the wheels strike a speed breakers, the spring is compressed instantly. The compressed spring will rebound back to its normal position, causing the body to be lifted. This bouncing process is repeated over and over, a little less each time. If bouncing is allowed to go uncontrolled, it will not only cause an uncomfortable ride but will make handling of the automobile very difficult. The design of spring in suspension system is very important. In this project a shock absorber is designed to automobile of capacity 150cc and a 3D model is created using NX UNIGRAPHICS 10. Structural analysis is carried out using ANSYS 14.5 on the shock absorber by varying material for spring, Structural Steel, Titanium alloy, Copper alloy, Aluminum alloy. The analysis is done by considering loads, bike weight, single person and 2 persons. Structural analysis is done to validate the strength and static analysis is done to determine the displacements for number of materials of spring. Comparison is done for four materials to verify best material for spring in Shock absorber.
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Design and fabrication B-care
LEJIN P REJI ; FRANCIS AUGUSTINE JOSEPH; MATHEW JOSEPH; VISHNU VIJAI; KURUVILLA GEORGE RAMACHA THYKKADAVIL
Mechanical Engineering
Year: 2016, Volume:2, Issue : 12
Pages: 56 - 63
The major problem associated with the conventional cradle used by our society is that, it is very difficult to swing the carriage resulting in sleepless nights for parents. Besides, observation of baby movement is also difficult with this approach. So B-care comes as a solution for this problem. B-Care is a novel concept, which enables the movements of a carriage, to raise the cradle, to move the machine from one place to another, automatic movement of cradle when baby is disturbed and much more.In our concept, mechanical links are provided for moving the carriage through bearings by using a dc 12V, 17 W motor. The equipment B-care includes a dc motor, link, and an oscillating bed and sensors. The electric powered motor will actuate the links by shaft. Links actuates the rod attached to the bed at constant speed. The carriage is attached to the metal rod through springs which will provide a vibratory motion. It will also ensure the cradle motion even when the baby cries or moves using sensors. Motor, link and sensors are attached to the side of the cradle frame. High strength, light weight material is used for the manufacturing of B-care. B-care is the most cost effective, user friendly, automated mechanism for baby care in the modern nuclear family.
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Abstract
