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Raja, K.
- Power Smoothening of Grid Connected Direct- Driven Permanent Magnet Synchronous Generator (PMSG) Wind Turbines
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Authors
Affiliations
1 Department of EEE, Knowledge Institute of Technology, Salem – 637504, Tamil Nadu, IN
2 Department of EEE, SRM University, Chennai – 603203, Tamil Nadu, IN
1 Department of EEE, Knowledge Institute of Technology, Salem – 637504, Tamil Nadu, IN
2 Department of EEE, SRM University, Chennai – 603203, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 9, No 42 (2016), Pagination:Abstract
Objectives: The main objective of this paper is smoothening of the power fluctuation of a variable speed PMSG wind generator with the help of Energy Capacitor System (ECS). ECS consists of a voltage source inverter, dc-dc converter and an ultra-capacitor bank including their control strategies. Methods/Analysis: In this paper two back-to-back voltage source Insulated Gate Biopolar Transistor (IGBT) converters controlled through highly efficient variable frequency drive control method is considered. By using this method, efficiency of wind farm can be improved and voltage regulation for interconnecting the wind farm with grid can be achieved. Findings: Recent application of power electronic devices and scaling up of MegaWatt (MW) wind turbines, Low-speed high torque Permanent Magnet Synchronous Generator (PMSG) has become the ultimate choice for wind power extraction. At present, a commercial PMSG based wind generator primarily makes use of a rectifier followed by an IGBT converter. Novelty /Improvement: The real power reference for ECS is generated accurately. Simulation is carried out through MATLAB/SIMULINK.Keywords
ECS, Grid Voltage Support Control, Maximum Power Extraction, PMSG Wind Generator, Reactive Power Control, Variable Frequency Drive Control, Voltage Source Converter.- Mechanical and Micro Structural Characterization of Al6082-TiO2 Metal Matrix Composites produced via Compo Casting Method
Abstract Views :155 |
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Authors
Affiliations
1 Department of Mechanical Engineering, University College of Engineering, Anna University.Dindigul – 624622, Tamil Nadu, IN
1 Department of Mechanical Engineering, University College of Engineering, Anna University.Dindigul – 624622, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 9, No 41 (2016), Pagination:Abstract
Objectives: Aluminum Matrix Composites (AMCs) are considered as a distinct category of the advanced materials, which have superior strength, light weight and good wear resistance. Methods/Statistical Analysis: In the present study, Al6082 is chosen as matrix material and Titanium Oxide (TiO2) particles as reinforcement. Aluminum-TiO2 composites reinforced with various weight percentages (0, 3, 6 and 9 wt. %) were produced by semi-solid state compo casting route. The microstructure of fabricated composites and monolithic alloys were examined by Optical Microscope (OP). Hardness and Ultimate Tensile Strength (UTS) of the produced composites were investigated. Findings: The test results show that the mechanical behaviors of the fabricated composites are enhanced by increasing the Titanium Oxide content. The UTS and hardness of the produced composite enhanced with the addition of higher percentage of TiO2. Application/Improvements: The mechanical performances of the Al-TiO2 AMCs are higher than that of the base monolithic alloy.Keywords
Al6082, Compo Casting, Microstructural Characterization, TiO2- Preventing Cloud Attacks using Bio-Metric Authentication in Cloud Computing
Abstract Views :199 |
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Authors
S. Srinivasan
1,
K. Raja
2
Affiliations
1 Research and Development Center, Bharathiar University, Coimbatore - 641046, Tamil Nadu, IN
2 Alpha College of Engineering, Udayavar Koil Street, Chennai - 602107, Tamil Nadu, IN
1 Research and Development Center, Bharathiar University, Coimbatore - 641046, Tamil Nadu, IN
2 Alpha College of Engineering, Udayavar Koil Street, Chennai - 602107, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 9, No 23 (2016), Pagination:Abstract
Objectives: To provide a secured and efficient solution for end users to access their personal files in the cloud servers using biometric authentication. Methods/: In this Minutiae Map (MM) algorithm is implemented for processing fingerprint based authentication. The user personal files are stored in free public multiple cloud storages namely Dropbox and CloudMe using splitting and merging techniques. RC4 algorithm is used to improve the security in cloud environment. Cross site request forgery (CSRF) and Cross site scripting (XSS) prevention techniques are used to provide security against cloud attacks. Findings: This study analyses that MM algorithm is the best accurate fingerprint feature extraction algorithm compared to Orientation Map, Gabor Filter and core point detection techniques. The proposed approach measures the user personal files upload time in cloud servers namely Dropbox and CloudMe. The study also analyses the presence of CSRF and XSS attacks in the application. Applications/ Improvements: The proposed system can be improvised involving preventive measures for more security threats and integrating other biometric authentications.Keywords
Cloud Computing, Fingerprint, Minutiae Map, Dropbox, CloudMe, CSRF, XSS- Ontology Centric Access Control Mechanism for Enabling Data Protection in Cloud
Abstract Views :228 |
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Authors
M. Auxilia
1,
K. Raja
2
Affiliations
1 Faculty of Computer Science and Engineering, Department of Computer Science and Engineering, Sathyabama University, Chennai - 600 119, Tamilnadu, IN
2 Alpha College of Engineering, Chennai, Tamilnadu, IN
1 Faculty of Computer Science and Engineering, Department of Computer Science and Engineering, Sathyabama University, Chennai - 600 119, Tamilnadu, IN
2 Alpha College of Engineering, Chennai, Tamilnadu, IN
Source
Indian Journal of Science and Technology, Vol 9, No 23 (2016), Pagination:Abstract
Background: Cloud computing provides access to a large scale of resources. Access control is the indispensable requirement for protecting cloud resource. A cloud service provider is responsible for enforcing access control and they normally rely upon conventional access control mechanisms. Methods: These access control policies, consider the access control primitives in separation which may lead to abuse of access control. These aforesaid problems motivated our research to center around the provision of access control by considering the association among the three access control primitives namely the user making access request, resource upon which access is requested and operation performed by the user on the resource. Hence Ontology Centric Access Control (OCAC) is being proposed in this paper. Findings: This OCAC circulates authorization rules among the primitives of access control say subject, object and action by reducing the various associations among the associations among the access control elements; it is observed that there is less chance for security violation. Ontology is used since it reduces the times of agreement while exchanging the authorization policies across the security domains. For reducing the number of statements and rules in policy base, subsumption property is used. This reduces the space and time complexity. Applications/Improvements: We are applying our work to protect bank data as banks are embracing clouds to store huge data by cutting their IT costs.Keywords
Access Control, Ontology, Cloud Computing, User Ontology, Resource Ontology, Activity Ontology Introduction.- Decision Making Process for B2C Model Using Behavior Analysis with Big Data Technologies
Abstract Views :196 |
PDF Views:0
Authors
Affiliations
1 Department of Computer Science and Engineering, Sathyabama University, Chennai - 600119, Tamil Nadu, IN
2 Department of Computer Science and Engineering, Alpha College of Engineering, Chennai - 600035, Tamil Nadu, IN
1 Department of Computer Science and Engineering, Sathyabama University, Chennai - 600119, Tamil Nadu, IN
2 Department of Computer Science and Engineering, Alpha College of Engineering, Chennai - 600035, Tamil Nadu, IN