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Madhubala R.P.,Veermata Jijabai Technological Institute
Proceedings of the 2015 International Conference on Green Computing and Internet of Things, ICGCIoT 2015 | Year: 2015

Cloud consists of vast number of servers. Cloud contains tremendous amount of information. There are various problems in cloud computing such as storage, bandwidth, environment problems like availability, Heterogeneity, scalability and security problems like reliability and privacy. Though so many efforts are taken to solve these problems there are still some security problems[1]. Ensuring security to this data is important issue in cloud Storage. Cloud computing security can be defined as broad set of technologies, policies and controls deployed to protect applications, data and corresponding infrastructure of cloud computing. Due to tremendous progress in technology providing security to customers data becomes more and more important. This paper will tell the need of third party auditor in security of cloud. This paper will give brief idea about what are the security threats in cloud computing. This paper will analyze the various security objectives such as confidentiality, integrity, authentication, auditing, accountability, availability, authorization. This paper also studies the various data security concerns such as various reconnaissance techniques, denial of service, account cracking, hostile and self-replicating codes, system or network penetration, Buffer overflow, SQL injection attack. © 2015 IEEE. Source


Palaskar V.N.,Veermata Jijabai Technological Institute | Deshmukh S.P.,Institute of Chemical Technology
Proceedings of the Indian National Science Academy | Year: 2012

The temperature of photovoltaic module increases when it absorbs solar radiation, causing a decrease in electrical efficiency. A hybrid photovoltaic/thermal collector or hybrid (PV/T) systems are used to partially avoid this undesirable effect. A water/air circulation system has found to be necessary to overcome the degradation in open circuit voltage (VOC) with PV panel temperature. The cooling of PV module helps to increase the electrical output and hot water can be obtained which will be improved the overall efficiency of the system. This paper gives a review of the trend of development in the technology of flat plate PV/Thermal water or air Collectors, in particular the advancements in recent years and the future work required. Source


Palaskar V.N.,Veermata Jijabai Technological Institute | Deshmukh S.P.,Institute of Chemical Technology
International Journal of Renewable Energy Research | Year: 2014

The hybrid (PV/T) solar water systems are commercially unviable because of its low concentration ratio, less combined PV/T efficiency, non-standardization of PV heat exchanger surface and long payback period. The simplest and cost effective technique to increase PV/T efficiency is to boost solar radiation on surface of PV module. This can be done by attaching flat reflectors to sides of commercial PV module. This paper provides design and performance analysis of commercial silicon based PV module with reflectors for Mumbai latitude (φ=19.12°). The flat reflectors made of anodized Aluminum sheet were attached to shorter sides of PV module at North-South direction. For different tilts of module and reflector orientations, photovoltaic power, efficiency and highest working temperature of modified module are discussed and analyzed. The modified PV module at 25° tilt and 24° reflector orientation with vertical surface of module could able to generate PV power and efficiency of 161 W and 13.8% respectively. This results shows that modified module produced 15% more PV power than one-sun concentration of PV module. During the experiments the modified module was found heated with maximum operating temperature of 66 °C. Source


Patil S.P.,Veermata Jijabai Technological Institute
2014 Annual International Conference on Emerging Research Areas: Magnetics, Machines and Drives, AICERA/iCMMD 2014 - Proceedings | Year: 2014

This paper presents a Z-Source inverter system and Double carrier control technique applied for Induction motor drive system. Z-Source Inverter system consists of a unique impedance structure of two capacitors and inductors connected in cross fashion, which cannot be observed in traditional inverter system. This special Z-Source network effectively utilizes shoot through state to boost the DC link voltage. Amount of boost in voltage depends on shoot through duty ratio and size of Z-Source elements. Because of this unique feature it can provide ride-through capability during voltage sags. Also it helps to minimize line harmonics, improves power factor and reduces motor rating. This paper uses double carrier PWM control which has additional benefits over conventional PWM control methods. A model of Z-Source Inverter based Induction Motor drive is built in MATLAB/SIMULINK to demonstrate these features. © 2014 IEEE. Source


Nawale S.D.,Sinhgad Institute of Technology | Sarawade N.P.,Veermata Jijabai Technological Institute
Proceedings of the International Conference on Sensing Technology, ICST | Year: 2012

Since RFID is wireless technology, it enables the identification from a distance, depending upon the read range of the tag. There is a vast requirement of RFID technology in security, military, health-care, airline, library, sports, farming and other applications, not only for identification but as a sensor to monitor different parameters related to these fields. RFID based environmental sensor can be designed with the integration of sensing material in a microstrip antenna. The properties of the sensing material are responsible for converting a passive tag as a sensor. Here, RFID based passive chemical vapor sensor is presented doped with the conducting polymer. A sensitive Polystyrene Sulfonate is used as sensing material to integrate in H-shaped slot of PIFA like tag. The designed tag working at 870 MHz is characterized by turn-on and back-scattered power measurements. The experimental results are also presented by considering known and unknown percentage of water vapor and the moisture levels. © 2012 IEEE. Source

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