Thermal properties of nanofluids: controversy in the making?

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Turbulence and dispersion

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Embedded AGN and star formation in the central 80 pc of IC 3639

[Abridged] Methods: We use interferometric observations in the $N$-band with VLTI/MIDI to resolve the mid-IR nucleus of IC 3639. The origin of the nuclear infrared emission is determined from: 1) the comparison of the correlated fluxes from VLTI/MIDI with the fluxes measured at subarcsec resolution (VLT/VISIR, VLT/ISAAC); 2) diagnostics based on IR fine-structure line ratios, the IR continuum emission, IR bands produced by polycyclic aromatic hydrocarbons (PAH) and silicates; and 3) the high-angular resolution spectral energy distribution. Results: The unresolved flux of IC 3639 is $90 \pm 20\, \rm{mJy}$ at $10.5\, \rm{\mu m}$, measured with three different baselines in VLTI (UT1-UT2, UT3-UT4, and UT2-UT3; $46$-$58\, \rm{m}$), making this the faintest measurement so far achieved with mid-IR interferometry. The correlated flux is a factor of $3$-$4$ times fainter than the VLT/VISIR total flux measurement. The observations suggest that most of the mid-IR emission has its origin on spatial scales between $10$ and $80\, \rm{pc}$ ($40$-$340\, \rm{mas}$). A composite scenario where the star formation component dominates over the AGN is favoured by the diagnostics based on ratios of IR fine-structure emission lines, the shape of the IR continuum, and the PAH and silicate bands. Conclusions: A composite AGN-starburst scenario is able to explain both the mid-IR brightness distribution and the IR spectral properties observed in the nucleus of IC 3639. The nuclear starburst would dominate the mid-IR emission and the ionisation of low-excitation lines (e.g. [NeII]$_{12.8 \rm{\mu m}}$) with a net contribution of $\sim 70\%$. The AGN accounts for the remaining $\sim 30\%$ of the mid-IR flux, ascribed to the unresolved component in the MIDI observations, and the ionisation of high-excitation lines (e.g. [NeV]$_{14.3 \rm{\mu m}}$ and [OIV]$_{25.9 \rm{\mu m}}$).Comment: Accepted for publication in A&

Mass Hierarchy Determination via future Atmospheric Neutrino Detectors

We study the problem of determination of the sign of Delta m^2_{31}, or the neutrino mass hierarchy, through observations of atmospheric neutrinos in future detectors. We consider two proposed detector types : (a) Megaton sized water Cerenkov detectors, which can measure the survival rates of nu_\mu + \bar{\nu}_\mu and nu_e + \bar{\nu}_e and (b) 100 kton sized magnetized iron detectors, which can measure the survival rates of \nu_\mu and \bar{\nu}_\mu. For energies and path-lengths relevant to atmospheric neutrinos, these rates obtain significant matter contributions from P_{\mu e}, P_{\mu \mu} and P_{ee}, leading to an appreciable sensitivity to the hierarchy. We do a binned \chi^2 analysis of simulated data in these two types of detectors which includes the effect of smearing in neutrino energy and direction and incorporates detector efficiencies and relevant statistical, theoretical and systematic errors. We also marginalize the \chi^2 over the allowed ranges of neutrino parameters in order to accurately account for their uncertainties. Finally, we compare the performance of both types of detectors vis a vis the hierarchy determination.Comment: 36 pages, 13 figures, revised version accepted in Physical Review

An Unusual Case of Moraxella osleonsis Bacteremia in an Immunocompetent Patient With SARS-CoV-2 Infection.

Moraxella osleonsis (M.osleonsis ) is an organism that rarely presents with bacteremia in immunocompetent patients. We report a case of an immunocompetent 59-year-old male with a recent SARS-CoV-2 infection that developed M. osleonsis bacteremia. We believe that SARS-CoV-2 infection may have played a role in developing M. osleonsis bacteremia in this patient and may be one of the first reported cases of such bacteremia in a COVID-19 patient

Monitoring Lateral Deflections of a Berthing Structure During Dredging — A Case Study

For one of the major ports in India, a shallow water berth is recently constructed comprising of a diaphragm wall and pile rows to support the deck structure. The soil strata are essentially very soft clay extending to a large depth. Reclaiming land behind this structure created number of problems including mud flow. The structure was constructed after placement of fill required for reclamation. After completion of the structure, when dredging work was undertaken, it was decided to monitor the lateral movements of berths, as the dredging depth increases. For this purpose inclinometer tubes were installed in one of the diaphragm wall panels and another in one of the piles of the structure. The structure is analysed using PLAXIS finite element software and results are compare with field measurements which are in good agreements

The morphology of lumbar sympathetic trunk in humans: a cadaveric study

The vasospastic diseases and chronic pain related to lower limb have been successfullytreated by surgical ablation of lumbar sympathetic trunk for last 80 years.Precise knowledge of anatomy of lumbar sympathetic trunk and its adjoiningstructures is mandatory for safe and uncomplicated lumbar and spinal surgeries.We aim to study the detailed anatomy of entry and exit of lumbar sympathetictrunk, the number, dimensions and location of lumbar ganglia in relation tolumbar vertebra. Thorough dissection was carried out in 30 formalin embalmedcadavers available in the Department of Anatomy, Pravara Institute of MedicalSciences (PIMS), Rural Medical College (RMC), Loni, Maharashtra. A total of238 ganglia were observed in 60 lumbar sympathetic trunks. The sympathetictrunk traversed dorsal to the crus of diaphragm in 72.6% and in 13.3% it entereddorsal to the medial arcuate ligament. The most common site of the location oflumbar ganglia was in relation to the second lumbar vertebra, sometimes extendingup to the L2–L3 vertebral disc. There was a medial shift of sympathetictrunk in lumbar region and it coursed over sacral promontory to reach the pelvicregion in 96% of specimens. These variations should be kept in mind in order toprevent hazardous complications like accidental avulsion of first lumbar gangliaand genitofemoral neuritis