Light Curve and Spectral Evolution of Type IIb Supernovae

Stripped-Envelope Supernovae constitute the sub-class of core-collapse supernovae that strip off their outer hydrogen envelope due to high stellar winds or due to interaction with a binary companion where mass transfer occurs as a result of Roche lobe overflow. We present here the photometric and spectroscopic analysis of a member of this class : SN 2015as classified as a type IIb supernova. Light curve features are similar to those of SN 2011fu while spectroscopic features are quite similar to those of SN 2008ax and SN 2011dh. Early epoch spectra have been modelled with SYN++ which indicates a photospheric velocity of 8500 km sec−1 and temperature of 6500K. Spectroscopic lines show transitioning from H to He features confirming it to be a type IIb supernova. Prominent oxygen and calcium emission features are indicative of the asymmetry of the ejecta. We also estimate the signal to noise ratio of the 3.6m telescope data. This telescope is located at ARIES, Devasthal, Nainital at an altitude of 2450m. We also show the comparison plots of spectra taken with a 2m and 4m class telescopes to enlighten the importance of spectral features displayed by bigger diameter telescopes.

Core-collapse SNe of type IIP and their progenitors: The case study of PNV J01315945+3328458

The type II supernovae (SNe) are hydrogen-rich cosmic explosions resulting from the collapse of massive stars. The impetus of studying individual events arises from its cosmological importance and the diverse understanding of the evolution and explosion mechanism of such events. In this work, we present the preliminary photometric and spectroscopic analysis of a recent type IIP explosion, PNV J01315945+3328458 in the galaxy NGC 582. While the initial phases of these energetic events are bright enough to be observed with the 1-2m class telescopes, the supernovae fade below the detection limit of these telescopes in the nebular phase. In addition, the class of sub-luminous events with Mv ∼ -15 or the events occurring at higher redshift, fade below the detection limit of these telescopes very early in their evolution. Large aperture telescopes like the newly installed 3.6m Devasthal Optical Telescope (DOT) will ensure a longer coverage of such events and also to probe deeper into the Universe. With the 3.6m telescope installed in Devasthal (DOT), we plan to study the progenitor environment of CCSNe to infer the metallicity at the explosion site.

General health status and morbidity pattern of bus drivers in West Bengal

1 Ergonomics and Occupational Physiology Laboratory, Department of Physiology, University of Kalyani, Nodia, 741235,West Bengal, India. 2 Regional Occupational Health Centre (E), Block DP, Sector V, Salt Lake, Kolkata – 70009, West Bengal, India. 3 College of Medicine and Sagore Dutta Hospital, 578 B T Road, Kolkata700058, West Bengal, India. 4 Department of Physiology, Sister Nibedita General Degree College, Kolkata700 027, West Bengal, India.

A Customized Semi- Precision Bar Attachment for Tooth Supported Overdenture: A Case Report

Various precision attachment systems are available for tooth supported overdenture treatment modality. The objective of all the systems is to provide retention and support for the overdenture. Retention of a mandibular denture can be achieved by natural tooth-retained with bar and stud attachment in anterior region. A simple and cost effective treatment for a more complex implant overdenture is the concept of conventional tooth-retained overdentures. The present clinical report describes a patient treated with customized hader bar with coffee straw in mandibular tooth-borne overdenture.

INDUSTRIAL ENGINEERING WILL HELP CREATE A BETTER WORLD

WORK SYSTEM facilitates the Work, the transformation process,at one or more places. Work at trillions of work systems, like cooking in Family kitchens , assembly lines, building houses, driving a car, teaching in a classroom, playing games, conducting orchestra, cultivating land, machining a component, building bridges, filing documents offices, fighting wars, to give very few examples, by all , over eons, have created the World we live in and love.

MEASURING PERFORMANCE OF ENVIRONMENTALLY RESPOSNSIVE SUPPLY CHAIN MANAGEMENT : A CASE STUDY OF INDIAN INDUSTRIAL SECTOR

Nagendra Kumar Sahu Dr. AC Shukla Abstract In recent times much emphasis is being given to environmental pollution and ecological damage caused by the modern methods of production of goods in large scale Industries. Government and corporate bodies have now started to look into the matter seriously. This paper aims to locate and recognize various factors responsible for the environmentally responsive and socially conscious supply chain management in various industries in India. For this data has been collected from 35 various industries in Pithampur area of Central India in the form of structured questionnaire. Being a new approach to supply chain management most of the industries are in early stage of adoption. This paper might serve as a guiding tool for future managers in implementing environmental issues across the supply chain organization to achieve competitive edge.

Risk Prioritization Using PFMEA Approach: A Case Study of Camshaft Sub Assembly

The objective of the study is to reduce the process potential failures and to prioritize the risk of failure of sub assembly of camshaft. A Process Failure Mode and Effects Analysis (PFMEA) methodology is used for risk investigative technique for potential process failure before it happens. PFMEAs focus on preventing failures, enhancing reliability and increasing custom potential failure modes, thus rating a priority system for corrective action considerations. Various possible causes of failure and their effects on sub systems have been evaluated for minimizing the failure manufacturing or assembly process. Generally, risk prioritization in PFMEA is carried out by using risk priority numbers (RPNs) which can be determined by evaluating three factors: occurrence (O), severity (S) and detection (D). Based on this param and, ultimately, to reduce the loss of time, quality and productivity.

Role of Medical Geology in Indian Society

Medical Geology is a broad and complex subject which requires interdisciplinary contributions from several different scientific fields. The importance of medical geology is multiple types in our society. Medical geology brings together geoscientists and medical/public health researchers to address health problems caused or exacerbated by geological materials; ultimately, it is only with multidisciplinary collaborations that interventions can be devised to reduce morbidity and mortality from such problems. Medical geology aims to understand how natural geological factors, such as, natural occurring elements (As, F, Cd, Pb, Hg, Co, Cu, Ni, U etc.) are affecting directly or indirectly Human and Animal health. Rocks are the source of most chemical elements found on the earth. Many elements in the right quantities are essential for plant, animal, and human health and have limited biological function. Generally, these elements are toxic in nature and may cause various health hazards in society. Most of these elements enter the human body via food and water in the diet and through the air that we breathe. The links between geology, environment and health are particularly important for subsistence populations that are heavily dependent on the local geology and environment for their food supply. Infectious diseases in humans are also dramatically affected by the geological environment, albeit indirectly. Geological forces shape the environments in which microbes thrive, sometimes creating opportunities for the emergence of infectious diseases as major public health problems. In the present paper an attempt has been made to describe general importance of medical geology for our society.

Tuberculosis of the Female Breast: A Case Report

Assessment of Paediatric usage of Antibiotics in Moradabad Region