Inflation with f(R,ϕ)f(R,\phi) in Jordan frame

We consider an $f(R)$ action that is non-minimally coupled to a massive scalar field. The model closely resembles scalar-tensor theory and by conformal transformation can be transformed to Einstein frame. To avoid the ambiguity of the frame dependence, we obtain an exact analytical solution in Jordan frame and show that the model leads to a period of accelerated expansion with an exit. Further, we compute the scalar and tensor power spectrum for the model and compare them with observations.Comment: 10 pages, 3 figure

Exact inflationary solutions in exponential gravity

We consider a modified gravity model of the form $f(R,\phi)=R e^{h(\phi)R}$, where the strong gravity corrections are taken to all orders and $\phi$ is a self-interacting massless scalar field. We show that the conformal transformation of this model to Einstein frame leads to non-canonical kinetic term and negates the advantage of the Einstein frame. We obtain exact solutions for the background in the Jordan frame without performing conformal transformations and show that the model leads to inflation with exit. We obtain scalar and tensor power-spectrum in Jordan frame and show that the model leads to red-tilt. We discuss the implications of the same in the light of cosmological observations.Comment: 17 pages, 4 figures, 2 table

User Attitudes on E-Books Collection in Mahatma Gandhi University Library: A Case Study

A study on the user’s attitudes, interest and understanding of e-book collections. The sample taken for the study is the E-book collection developed at the Mahatma Gandhi University Library and its users. The survey assessed the impact of the e-books on teaching learning and research. The problems associated with the use of e-books aware also identified. The inference of the study are that the user’s require an orientation on different types of collections, and also extended facilities for access which is possible in this format

Evolution of documents - Information and Data objects

The vast amount of data leading to the digital data explosion highlights the fact that the current data definition needs a change as the current systems are unable to track the evolution in a document over time without manual intervention. The concepts of Information and Data objects are introduced in this thesis to track the evolution information in a document. We developed the requirements for such a system in which the evolution information is automatically tracked by tracking the user copy and paste action and then using the data to create the evolution information about a specified document. A case study is discussed to further analyse the information and data flow in a collaboration. We have used this knowledge to design the system and then to implement the system so that the user copy and paste actions can be tracked to create the evolution information. The implementation is then presented to a group of experts to identify the problems and to get the feedback to improve the system

Quality Certifications Relevant to Seafood Trade

The fisheries trade is very much linked with various types of certifications to meet different legal, market and customer requirements. This paper contains basic information on relevant certifications in the seafood trade with the broad context of quality, which essentially include environment and safety also