Azimuthal correlations of D-mesons in pp+pp and pp+Pb collisions at LHC energies

We study the correlations of D mesons produced in $p$+$p$ and $p$+Pb collisions. These are found to be sensitive to the effects of the cold nuclear medium and the transverse momentum ($p_T$) regions we are looking into. In order to put this on a quantitative footing, as a first step we analyse the azimuthal correlations of D meson-charged hadron(Dh), and then predict the same for D meson -anti D meson ($D\overline{D}$) pairs in $p$+$p$ and $p$+Pb collisions with strong coupling at leading order $\cal{O}$($\alpha_{s}^{2}$) and next to leading order $\cal{O}$($\alpha_{s}^{3}$) which includes space-time evolution (in both systems), as well cold nuclear matter effects (in $p$+Pb). This also sets the stage and baseline for the identification and study of medium modification of azimuthal correlations in relativistic collision of heavy nuclei at the Large Hadron Collider.Comment: 12 pages, 4 figure

Near-infrared Observations of Be/X-ray Binary Pulsar A0535+262

We present results obtained from an extensive near-infrared spectroscopic and photometric observations of the Be/X-ray binary A0535+262/HDE 245770 at different phases of its ~111 day orbital period. This observation campaign is a part of the monitoring programme of selective Be/X-ray binary systems aimed at understanding the X-ray and near-IR properties at different orbital phases, especially during the periastron passage of the neutron star. The near-IR observations were carried out using the 1.2 m telescope at Mt. Abu IR observatory. Though the source was relatively faint for spectroscopic observations with 1.2 m telescope, we monitored the source during the 2011 February--March giant outburst to primarily investigate whether any drastic changes in the near-IR JHK spectra take place at the periastron passage. Changes of such a striking nature were expected to be detectable in our spectra. Photometric observations of the Be star show a gradual and systematic fading in the JHK light curves since the onset of the X-ray outburst that could suggest a mild evacuation/truncation of the circumstellar disc of the Be companion. Near-IR spectroscopy of the object shows that the JHK spectra are dominated by the emission lines of hydrogen Brackett and Paschen series and HeI lines at 1.0830, 1.7002 and 2.0585 micron. The presence of all hydrogen emission lines in the JHK spectra, along with the absence of any significant change in the continuum of the Be companion during X-ray quiescent and X-ray outburst phases suggest that the near-IR line emitting regions of the disc are not significantly affected during the X-ray outburst.Comment: 10 Pages, 5 Figures, Accepted for publication in Res. in Astronomy and Astrophysic

The spectrum of sickle hemoglobin-related nephropathy: from sickle cell disease to sickle trait

Renal dysfunction is among the most common complication of sickle cell disease (SCD), from hyposthenuria in children to progression to overt chronic kidney disease (CKD) in young adults. Emerging evidence now suggests that sickle hemoglobin-related nephropathy extends to individuals with sickle cell trait (SCT)

Efficient absolute aspect determination of a balloon borne far infrared telescope using a solid state optical photometer

The observational and operational efficiency of the TIFR 1 meter balloon borne far infrared telescope has been improved by incorporating a multielement solid state optical photometer (SSOP) at the Cassegrain focus of the telescope. The SSOP is based on a 1-D linear photo diode array (PDA). The online and offline processing schemes of the PDA signals which have been developed, lead to improvement in the determination of absolute telescope aspect ($\sim$ 0\farcm8), which is very crucial for carrying out the observations as well as offline analysis. The SSOP and its performance during a recent balloon flight are presented here.Comment: To appear in the February 2000 issue of the PAS

A True 1V 1µW Biomedical Front End with Reconfigurable ADC for Self powered Smarter IoT Healthcare Systems

This work proposes an ultralow power highly linear analog front-end (AFE) with an input dynamic range from 200μVpp to 20mVpp. The system consists of a signal conditioning instrumentation amplifier (IA), two programmable gain amplifiers (PGA), a mixed signal automatic gain control (AGC), two sample and hold (S/H), a 10 bit successive approximation register (SAR) analog to digital converter (ADC), and a ΣΔ modulator with 10 bit effective number of bits (ENOB). A highly linear capacitively-coupled IA is achieved by increasing its feedback factor. Moreover, a transconductance (gm) cancellation technique is proposed for achieving a high common mode rejection ratio (CMRR). The conditioned signal is digitized using a SAR ADC for an input range of 200μVpp to 2mVpp, and, an opamp-shared ΣΔ ADC for an input range of 2mVpp to 20mVpp. The selection between the two ADCs is done by the AGC. The full system is designed using 1V supply in UMC 0.18μm CMOS technology. The AFE (IA and the two PGAs) achieves an overall linearity of more than 12 bits, for an input range of 200μVpp to 20mVpp while consuming 300nW with a bandwidth of 0.05 - 250Hz. The power consumption of the SAR ADC is 40nW while operating at a sampling frequency of 1KHz. The ΣΔ ADC consumes 300nW at a sampling frequency of 32KHz with an OSR of 32. The proposed system is intended to be powered by an energy scavenging circuit without compromising its own performance. The system was successfully tested for an ECG signal obtained from PTB database

Implementation of Environment-Friendly Strategies for Energy Conservation and Mitigation of Climate Change – A Holistic Approach in Mangalagangotri Campus

The harnessing of renewable energies and mitigation of climate change are like two faces of a coin. Decentralized implementation and individual-level practices of eco-friendly strategies contribute a lot on a global scale. In this context, Mangalore University on its headquarters Mangalagangotri campus, adopted and implemented many eco-friendly activities, technologies, and policies for sustainable development. Installation of solar power panels for electricity generation, of the current estimated value of 23,13,311 kWh/month; replacement of incandescent bulbs with LED bulbs with an energy saving of around 62% and procurement of most energy-efficient electronic & electrical appliances (47%) are some of the technologies that have been implemented for energy conservation. Implementation of e-Governance and e-Office program of Govt of Karnataka, and campus management system, social media, and email-based official communications have significantly reduced the usage of papers (>70% ); a complete ban on single-use plastics; recycling of organic wastes through vermicomposting, pot-composting, biogas production; encouraging electric vehicles are some of the adopted strategies. Altogether these strategies have significantly reduced the release of greenhouse gases in and around the campus in our efforts to join with global efforts to drop carbon footprint below 2 tons by 2050. The rainwater harvesting through the rooftop catchments and check-dams contributed to ≈ 50% water conservation. The campus comprises 32.4% of its total area with natural vegetation (463192 m2) and currently with 30.8% planted vegetation (439670 m2) of the total area (1428540 m2). The campus biodiversity was further enriched by periodical tree plantation drives with special reference to the planting of fruit-yielding saplings. As an Institutional Social Responsibility (ISR), the university has been making efforts to disseminate the knowledge of eco-friendly practices, by conducting public awareness programs and publishing popular articles in regional language. Despite the COVID-19 pandemic and government-imposed lockdown to curb the spread of the novel coronavirus, the University has continued eco-friendly activities and setting up of infrastructures, by strictly following safety guidelines. Overall, our continued holistic approaches of various eco-friendly strategies, in terms of the utility of advanced technologies, eGovernance, solar energy, and rainwater harvesting, organic wastes management, recycling of solid wastes, and many others, have been implemented since its inception have significantly helped in saving energy and reduction in the emission of greenhouse gases.Keyword: Climate change; Eco-friendly strategies; Carbon footprint; Greenhouse gase