Pandit Deendayal Petroleum University

About: Pandit Deendayal Petroleum University is a education organization based out in Gandhinagar, Gujarat, India. It is known for research contribution in the topics: Welding & Computer science. The organization has 996 authors who have published 1804 publications receiving 16594 citations.

A Comprehensive Study on Critical Security Issues and Challenges of the IoT World

Abstract: The Internet of Things (IoT) expected for infinite connectivity among various elements or “things”. It converges with interpersonal organizations, enabling individuals and gadgets to collaborate, and facilitating data sharing. However, security and protection issues are an incredible test for IoT, yet they are likewise empowering components to make a “trust environment”. The inherent vulnerabilities of IoT gadgets, with restricted assets and heterogeneous innovations, together with the absence of specifically planned IoT models, representable to reproduce ground for the development of specific digital dangers. In this paper, we begin with the three main key layers of the IoT system model: 1) perception; 2) network; and 3) application levels and continue on with information security-related challenges that IoT will encounter. Finally, as a result of the examination, authors will highlight the most critical issues with the point of managing future research directions.

Comprehensive geochemical/hydrochemical and geo-thermometry analysis of Unai geothermal field, Gujarat, India

Abstract: The knowledge of water temperature produced from a geothermal reservoir and its composition is of utmost importance in designing utilization strategies, the surface production facilities and in selecting the material to be used. Unai hot springs are located in the southern part of Gujarat, India with discharge temperatures varying from 51 to 56 °C. With the aim of developing Unai as a potential geothermal field and exploiting it in the future, geochemical and geothermometrical study was undertaken. The samples were collected from various Unai geothermal location and analysis of chemical composition of water obtained from different wells was done. The concentration of Silica, carbonate and ions like Na and Cl have been analyzed to delineate the path of water movement in the subsurface and classify the reservoir based on the enthalpy. The ratio of the concentration of ions like Na+ and K+ and the relative proportions of various sets of ions were also used to characterize the geothermal reservoir and the reservoir fluid by the use of ternary diagrams. Na–K–Ca, Chalcedony, quartz, and Silica geo-thermometers have been studied. The present study also envisages the importance of graphical representations like Piper diagram, Scholler etc. to determine variation in hydrochemical facies and to understand the evolution of hydrochemical processes in the Unai geothermal field respectively. The study yields the conclusion that the reservoir under consideration is a low enthalpy reservoir with temperature ranging from 60 to 80 °C.

Electronic, magnetic, thermoelectric and lattice dynamical properties of full heusler alloy Mn2RhSi: DFT study

Abstract: The manganese based heusler compounds are important class of materials having remarkable ferrimagnetic and thermoelectric properties Among them, Mn2RhSi which crystallizes in both Hg2CuTi and Cu2MnAl type structure have undergone detailed investigation for its electronic, magnetic and mechanical properties in Hg2CuTi type structure However, no studies have been performed on Cu2MnAl type structure of Mn2RhSi In this study we have performed a detailed comparative study on electronic, magnetic, mechanical, thermoelectric and lattice dynamical behavior of both types of Mn2RhSi structures The higher value of thermal conductivity reduces the thermo electric figure of merit in the material and has large value of Seebeck coefficient making these alloys as a potential candidate for thermoelectric device application Our results show high value of spin polarization ratio for Mn2RhSi which can increase the efficiency of spintronics devices which further have direct application in magnetic random access memory device The heusler compound are least studied for their lattice dynamical behavior In our work, we perform detail investigation on lattice dynamical behavior of both type structures of Mn2RhSi Our calculations revealed the anomalous behavior of optical phonons in Cu2MnAl type structure which was attributed to the presence of peak right at the Fermi level in electronic density of states whereas phonon dispersion curves of Hg2CuTi type structure confirms its dynamical stability