Polarized Light from the Transportation of a Matter-Antimatter Beam in a Plasma

A relativistic electron-positron beam propagating through a magnetized electron-ion plasma is shown to generate both circularly and linearly polarized synchrotron radiation. The degrees of circular and linear polarizations depend both on the density ratio of pair beam to background plasma and initial magnetization, and a maximum degree of circular polarization $\langle P_\textrm{circ}\rangle \approx 18\%$ is found to occur for a tenuous pair beam. We demonstrate that the generation of circularly polarized radiation is intrinsically linked to asymmetric energy dissipation of the pair beam during the filamentation instability dynamics in the electron-ion plasma. These results can help in understanding the recent observations of circularly polarized radiation from gamma-ray-bursts

Foundation Problems at a Residential Complex – A Case History

The paper describes a case history in connection with foundation problems at a residential complex on the adequacy or otherwise of the bearing capacity of foundation soil for raising the existing buildings to double storeyed configuration. The study made possible to raise few existing buildings to double storeyed where safe bearing capacity was found adequate and these buildings could reveal good performance since implementation of suggestions

Failure of Buildings on Mound ̶ A Case Study

The century old buildings situated on mound at Jais town, Rae Bareli (Uttar Pradesh), India, failed after heavy rainfall. The paper presents the convincing evidence of the failure or buildings through photographs. The prime cause of failures and suggestions are also reported

Critical Appraisal of Baby Friendly Hospital Initiatives among the beneficiaries of Indore Urban - A Comparative Study

Background: Majority of the women in M.P who breastfeed their babies throw away the colostrum before they begin actual feed. Only 14.9% females feed their babies with in 1/2 an hour (National Family Health Survey-3). In Indore 2 hospitals have been given designation of baby friendly hospital (BFH) namely M.Y. hospital (MYH) which is a tertiary care center, attached to Medical College and District hospital (DH). Objectives: (1) To assess the process of implementation of baby friendly hospital initiative programme. (2) Knowledge, Attitude, Practice regarding breast feeding amongst the beneficiaries. Methods: A comparative study was conducted between two BFH and two NBFH (Non Baby Friendly Hospitals) of Indore. The respondents were categorized into health care providers and beneficiaries. A pretested questionnaire was used to interview the respondents which was made taking into consideration the essential 10 Criteria of BFHI Programme. Results: 89% in BFH and 97% in NBFH were having positive attitude towards colostrum feeding. 81% postnatal mothers in BFH and 96% in NBFH were having knowledge about benefits of exclusive breast feeding. 21% postnatal mothers in BFH and 39% in NBFH initiated breast feeding within ½ an hour. 64 % of mothers in BFH and 62 % mothers in NBFH were practicing exclusive breast Feeding. Conclusion: The above findings show that although designated as BFH, the breast feeding practices remained poor as compared to NBFH. There is an utmost need to reinforce training and constant monitoring of health care providers regarding BFHI

Characteristics of six new para-fluorophenylalanine resistant loci of Aspergillus nidulans.

Characteristics of six new para-fluorophenylalanine resistant loci of Aspergillus nidulans

Legitimacy defense during post-merger integration: Between coupling and compartmentalization

During post-merger integration, the realization of the benefits of potential synergies depends on managing the legitimacy of the merger. However, we still know little about how threats that change stakeholders’ assessments of a merger’s legitimacy are managed. This study is based on the merger case of Air New Zealand’s trans-national acquisition of Ansett Australia where a delegitimizing event occurred at Ansett relatively early after the integration had started. The study builds a framework of an evolving legitimation process depicting the oscillation between legitimation responses that maintain the coupling between the two organizations and a compartmentalization response used to manage diverse stakeholders’ legitimacy demands and illegitimacy spillover concerns. We explain how these legitimation responses can create an unproductive oscillation where stakeholder assessments of illegitimacy build up and ultimately become unresolvable. Our processual framework provides novel insights regarding when attempts to defend legitimacy can prove self-defeating, demonstrating how previous responses emphasizing integration or separation can affect the success of subsequent swings back to coupling or compartmentalization

Stress Corrosion Cracking of Stainless Steel Super Heater Tubes in 200 MW Boiler

A few cases of super heater tube failures by corrosion were noticed in a boiler of 210 MW units of NTPC stations. The failure investigation was carried out at the Research and Development centre of NTPC. The failed tubes were examined by using Optical, scanning Electron Microscope and conventional methods. The material of the tube was stabilised grade austenitic stainless steel. The micro-scopic examination indicated the presence of a large number of transgranular cracks with branches. The surface analysis by EDAX revealed the presence of chloride in the corrosion products. The reason of failure has been attributed to chloride induced stress corrosion cracking. Chloride ions had generated supposedly due to leaching of residual contaminants carried over from manufacturing stage. It was suggested to check the cracks already gene-rated by NDT methods and wash the tube panels which were already installed. After implementation of the recomm-endations, no such case of tube failure was reported. The present paper describes the investigations carried out and the remedial measures to prevent chloride induced stress corrosion cracking in supper heater tubes