Inflation with an antisymmetric tensor field

We investigate the possibility of inflation with models of antisymmetric tensor field having minimal and nonminimal couplings to gravity. Although the minimal model does not support inflation, the nonminimal models, through the introduction of a nonminimal coupling to gravity, can give rise to stable de-Sitter solutions with a bound on the coupling parameters. The values of field and coupling parameters are sub-planckian. Slow roll analysis is performed and slow-roll parameters are defined which can give the required number of e-folds for sufficient inflation. Stability analysis has been performed for perturbations to antisymmetric field while keeping the metric unperturbed, and it is found that only the sub-horizon modes are free of ghost instability for de-Sitter space.Comment: 10 pages; minor correction to the claim of Sec. IV; to appear in EPJ

Impact of Transformational Leadership on Job Involvement and Organizational Commitment

Managing an organization for effectiveness requires effective leadership. There abound different styles of leadership with attendant different effects. This project studied the effect of transformational leadership styles on organizational commitment and job involvement in the petroleum public sector as a case study. The purpose of the study is to examine the relationship between transformational leadership and organizational commitment and Job Involvement in petroleum sector. In order to achieve the above objective, employees from various departments are surveyed with the help of questionnaire by following non probability convenient sampling technique. A total of 120 questionnaires were distributed among the employees of ONGC Vadodara; out of which 98 were properly filled and returned. This research was carried out by measuring the data gathered from the five point likert scale. This gives a response rate of 81%. Reliability test and factor analysis comprising principal component analysis have been done based on statistical principle. Bases on the variables loaded most strongly on each factor the items are grouped under three factors. The collected empirical data pertaining to the various responses are decoded and analyzed by using SPSS, version 20. The major finding shows that Transformational leadership style is the best approach to be used for any organization that creates organisational commitment through improved performance of its employees. The entire three hypotheses were accepted. From organizational point of view, this project will help the company in assessing the impact of leadership on organizational commitment and job involvement. From organizational point of view, this project will help the company in assessing the impact of leadership on organizational commitment and job involvement. It will give them insights from a current research which is up to date, as employee preferences tend to change over time