Compensation of B-L charge of matter with relic sneutrinos

We consider massless gauge boson connected to B-L charge with and without compensation to complete the investigation of the gauging of B and L charges. Relic sneutrinos predicted by SUSY and composite models may compensate B-L charge of matter. As a consequence of the possible compensation mechanism we have shown that the available experimental data admit the range of the B-L interaction constant, 10^{-29} < {\alpha}_{B-L} < 10^{-12}, in addition to {\alpha}_{B-L} < 10^{-49} obtained without compensation.Comment: 6 page

Bond percolation on a class of correlated and clustered random graphs

We introduce a formalism for computing bond percolation properties of a class of correlated and clustered random graphs. This class of graphs is a generalization of the Configuration Model where nodes of different types are connected via different types of hyperedges, edges that can link more than 2 nodes. We argue that the multitype approach coupled with the use of clustered hyperedges can reproduce a wide spectrum of complex patterns, and thus enhances our capability to model real complex networks. As an illustration of this claim, we use our formalism to highlight unusual behaviors of the size and composition of the components (small and giant) in a synthetic, albeit realistic, social network.Comment: 16 pages and 4 figure

Long and short paths in uniform random recursive dags

In a uniform random recursive k-dag, there is a root, 0, and each node in turn, from 1 to n, chooses k uniform random parents from among the nodes of smaller index. If S_n is the shortest path distance from node n to the root, then we determine the constant \sigma such that S_n/log(n) tends to \sigma in probability as n tends to infinity. We also show that max_{1 \le i \le n} S_i/log(n) tends to \sigma in probability.Comment: 16 page

Numerical Simulations of the Onset and Stability of Dynamical Mass Transfer in Binaries

Hydrodynamical simulations of semi-detached, polytropic binary stars are presented in an effort to study the onset and stability of dynamical mass transfer events. Initial, synchronously rotating equilibrium models are constructed using a self-consistent-field technique and then evolved with an Eulerian hydrodynamics code in a fully self-consistent manner. We describe code improvements introduced over the past few years that permit us to follow dynamical mass-transfer events through more than 30 orbits. Mass-transfer evolutions are presented for two different initial configurations: A dynamically unstable binary with initial mass ratio (donor/accretor) $q_0 = 1.3$ that leads to a complete merger in $\sim 10$ orbits; and a double-degenerate binary with initial mass ratio $q_0 = 0.5$ that, after some initial unstable growth of mass transfer, tends to separate as the mass-transfer rate levels off.Comment: 47 pages, 11 figures, submitted to the Astrophysical Journal. See http://www.phys.lsu.edu/faculty/tohline/astroph/dmtf05 for high resolution figures and mpeg animation

Algorithm for normal random numbers

We propose a simple algorithm for generating normally distributed pseudo random numbers. The algorithm simulates N molecules that exchange energy among themselves following a simple stochastic rule. We prove that the system is ergodic, and that a Maxwell like distribution that may be used as a source of normally distributed random deviates follows when N tends to infinity. The algorithm passes various performance tests, including Monte Carlo simulation of a finite 2D Ising model using Wolff's algorithm. It only requires four simple lines of computer code, and is approximately ten times faster than the Box-Muller algorithm.Comment: 5 pages, 3 encapsulated Postscript Figures. Submitted to Phys.Rev.Letters. For related work, see http://pipe.unizar.es/~jf

Growth Kinetics, Optical studies of Pure and Mg2+ Doped Nickel Cadmium Oxalate Single Crystals

Growth of pure (nickel cadmium oxalate) and Mg2+ doped nickel cadmium oxalate (MNCO) single crystals were grown by the single diffusion gel method at room temperature, by optimizing the various growth parameters such as specific gravity of sodium meta silicate (SMS), gel pH, gel temperature, gel aging, concentration of supernatant solution and concentration of oxalic acid. The morphology and composition of elements present in the crystals were identified using SEM-EDX analysis. The FTIR study shows that the occurrences of C=O, C-O, C-C, O-H and M-O bonding within the crystal lattice. The triclinic crystal system with P-1 space group were identified using, X-ray diffraction method. The absorbance, transmittance, energy gap, refractive index (n), reflectance (R) and insulating behaviour of the grown crystals were analysed using UV-Visible spectrophotometer

Tuberculosis notification in a private tertiary care teaching hospital in South India: a mixed-methods study

From BMJ via Jisc Publications RouterHistory: received 2018-05-08, rev-recd 2018-10-31, accepted 2018-11-05, ppub 2019-02, epub 2019-02-05Publication status: PublishedFunder: Swedish Research CouncilFunder: Department for International Development, FundRef: http://dx.doi.org/10.13039/501100000278Funder: Welcome trust/ DBT AllianceFunder: La Fondation Veuve Emile Metz-Tesch, LuxumbergObjectives India contributes approximately 25% of the ‘missing’ cases of tuberculosis (TB) globally. Even though ~50% of patients with TB are diagnosed and treated within India’s private sector, few are notified to the public healthcare system. India’s TB notification policy mandates that all patients with TB are notified through Nikshay (TB notification portal). We undertook this study in a private hospital to assess the proportion notified and factors affecting TB notifications. We explored barriers and probable solutions to TB notification qualitatively from health provider’s perspective. Study setting Private, tertiary care, teaching hospital in Bengaluru, South India. Methodology This was a mixed-methods study. Quantitative component comprised a retrospective review of hospital records between 1 January 2015 and 31 December 2017 to determine TB notifications. The qualitative component comprised key informant interviews and focus groups to elicit the barriers and facilitators of TB notification. Results Of 3820 patients diagnosed and treated, 885 (23.2%) were notified. Notifications of sputum smear-positive patients were significantly more likely, while notifications of children were less likely. Qualitative analysis yielded themes reflecting the barriers to TB notification and their solutions. Themes related to barriers were: (1) basic diagnostic procedures and treatment promote notification; (2) misconceptions regarding notification and its process are common among healthcare providers; (3) despite a national notification system other factors have prevented notification of all patients; and (4) establishing hospital systems for notification will go a long way in improving notifications. Conclusions The proportion of patients with TB notified by the hospital was low. A comprehensive approach both by the hospital management and the national TB programme is necessary for improving notification. This includes improving awareness among healthcare providers about the requirement for TB notifications, establishing a single notification portal in hospital, digitally linking hospital records to Nikshay and designating one person to be responsible for notification

Deficiency and Also Transgenic Overexpression of Timp-3 Both Lead to Compromised Bone Mass and Architecture In Vivo

Tissue inhibitor of metalloproteinases-3 (TIMP-3) regulates extracellular matrix via its inhibition of matrix metalloproteinases and membrane-bound sheddases. Timp-3 is expressed at multiple sites of extensive tissue remodelling. This extends to bone where its role, however, remains largely unresolved. In this study, we have used Micro-CT to assess bone mass and architecture, histological and histochemical evaluation to characterise the skeletal phenotype of Timp-3 KO mice and have complemented this by also examining similar indices in mice harbouring a Timp-3 transgene driven via a Col-2a-driven promoter to specifically target overexpression to chondrocytes. Our data show that Timp-3 deficiency compromises tibial bone mass and structure in both cortical and trabecular compartments, with corresponding increases in osteoclasts. Transgenic overexpression also generates defects in tibial structure predominantly in the cortical bone along the entire shaft without significant increases in osteoclasts. These alterations in cortical mass significantly compromise predicted tibial load-bearing resistance to torsion in both genotypes. Neither Timp-3 KO nor transgenic mouse growth plates are significantly affected. The impact of Timp-3 deficiency and of transgenic overexpression extends to produce modification in craniofacial bones of both endochondral and intramembranous origins. These data indicate that the levels of Timp-3 are crucial in the attainment of functionally-appropriate bone mass and architecture and that this arises from chondrogenic and osteogenic lineages

The impact of COVID-19 pandemic on diagnosis and management of gastrointestinal cancers

Gastrointestinal (GI) cancer is one of the leading causes of death that affect many patients around the world. The coronavirus disease 2019 (COVID-19) pandemic significantly impacted our healthcare system in large that diagnosis and management of GI cancer have suffered with a reduction in cancer screening. This review will describe the current practices of cancer screening during COVID-19 pandemic and summarize how each GI cancer (esophageal, gastric, colorectal, and hepatocellular cancers) has been affected by COVID-19. World widely there has been a decreasing trend in screening, diagnosis, and management of GI cancers during the COVID-19 pandemic. Many healthcare institutions are now observing the effect of this change and implementing practice variations to adapt to the pandemic

The Voicing Hidden Histories Project: Participatory Video in Development, Soft Power and Film Language

In this article, we wish to reflect upon some of the findings of a recent Arts and Humanities Research Council-funded Global Challenges Research Fund Participatory Video (PV) project ‘Voicing Hidden Histories’. Working in South Africa, India and Brazil, this project has been using PV to support specific marginalised communities in each country to challenge the way their nations present themselves – and in particular their national history – to the world via ‘nation branding’ and other ‘soft power’ initiatives. Specifically, we ask: why use filmmaking as an international development tool? What are the enablers of – and barriers to – successful PV initiatives and what does ‘success’ mean in this context? Moreover, while such projects invariably make claims for PV as a particularly effective method for ‘giving’ communities ‘voice’ – however such potentially patronising terms might be defined – very little space is usually dedicated to the exploration of the films produced in such projects, that is to the specific articulation of this ‘voice’. Thus, we also wish to challenge a trend in the analysis of such projects that focuses entirely on questions of methodology and an understanding of PV as a process, largely ignoring the products made