Food irradiation - Wikipedia
British English) is the process of exposing food and food packaging to ionizing radiation, such as from gamma rays, x-rays, or electron beams. Food irradiation
Fin ray-inspired, Origami, Small Scale Actuator for Fin Manipulation in Aquatic Bioinspire…
Fish locomotion is enabled by fin rays-actively deformable boney rods, which manipulate the fin to facilitate complex interaction with surrounding water and enable propulsion. Replicating the performance and kinematics of the biological fin ray from...
Quantifying the effect of X-ray scattering for data generation in real-time defect detecti…
Background: X-ray imaging is widely used for the non-destructive detection of defects in industrial products on a conveyor belt. In-line detection requires highly accurate, robust, and fast algorithms. Deep Convolutional Neural Networks (DCNNs) satis...
Elizabeth Gilbert admits to enabling late girlfriend Rayya’s drug relapse, plotting her mu…
Elizabeth Gilbert (author of Eat Pray Love) released her controversial new memoir All The Way To The River this week. Some facts from the book. Warning, these get more fucked up the farther you read...
HST Observations of the Serendipitous X-ray Companion to Mrk 273: Cluster at z=0.46?
We have used HST I-band images to identify Mrk 273X, the very unusual high-redshift X-ray-luminous Seyfert 2 galaxy found by ROSAT in the same field-of-view as Mrk 273. We have measured the photometric properties of Mrk 273X and have also analyzed...
Innovative use of X-ray radiography in the study of daguerreotypes: identification of hall…
X-ray radiography is an imaging technique widely used in the examination of works of art and heritage objects, however no references to its application to the study of daguerreotypes have been found. The results obtained in this study demonstrate for...
Fermi LAT detection of pulsed gamma-rays from the Vela-like pulsars PSR J1048-5832 and PSR…
We report the detection of gamma-ray pulsations (> 0.1 GeV) from PSR J2229+6114 and PSR J1048-5832, the latter having been detected as a low-significance pulsar by EGRET. Data in the gamma-ray band were acquired by the Large Area Telescope aboard t...
Raychaudhuri Equation from Lagrangian and Hamiltonian formulation : A Quantum Aspect
The paper deals with a suitable transformation related to the metric scalar of the hyper-surface so that the Raychaudhuri Equation (RE) can be written as a second order nonlinear differential equation. A first integral of this second order differenti...
Quadratic matings and ray connections
A topological mating is a map defined by gluing together the filled Julia sets of two quadratic polynomials. The identifications are visualized and understood by pinching ray-equivalence classes of the formal mating. For postcritically finite polynom...
Black Friday Blu-ray Deals from Walmart, Amazon, Best Buy and More
Nov 22, 2021 · Several retailers are offering incredible discounts on Blu-ray and 4K movies leading up to Black Friday. See which movies are on sale here.
ray-cast/AnimatorGo
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X-ray Polarization Signatures of Compton Scattering in Magnetic Cataclysmic Variables
Compton scattering within the accretion column of magnetic cataclysmic variables (mCVs) can induce a net polarization in the X-ray emission. We investigate this process using Monte Carlo simulations and find that significant polarization can arise...
COMPTEL detection of pulsed gamma-ray emission from B1509-58 up to at least 10 MeV
We report on the first firm detection of pulsed gamma-ray emission from PSR B1509-58 in the 0.75-30 MeV energy range in CGRO COMPTEL data collected over more than 6 years. The modulation significance in the 0.75-30 MeV pulse-phase distribution is 5...
GRB091127/SN2009nz and the VLT/X-shooter spectroscopy of its host galaxy: probing the fain…
We perform a detailed study of the gamma-ray burst GRB091127/SN2009nz host galaxy at z=0.490 using the VLT/X-shooter spectrograph in slit and integral-field unit (IFU). From the analysis of the optical and X-ray afterglow data obtained from ground-ba...
Variable X-ray absorption in the mini-BAL QSO PG 1126-041
X-ray studies of active galactic nuclei (AGN) with powerful nuclear winds are important for constraining the physics of the inner accretion/ejection flow around supermassive black holes (SMBHs) and for understanding the impact of such winds on the AG...
Coordinated X-ray and UV absorption within the accretion disk wind of the active galactic…
Accretion disk winds launched close to supermassive black holes (SMBHs) are a viable mechanism to provide feedback between the SMBH and the host galaxy. We aim to characterize the X-ray properties of the inner accretion disk wind of the nearby active...
Dr TIM: Ray-tracer TIM, with additional specialist scientific capabilities
We describe several extensions to TIM, a raytracing program for ray-optics research. These include relativistic raytracing; simulation of the external appearance of Eaton lenses, Luneburg lenses and generalized focusing gradient-index (GGRIN) lenses,...
A Prototype PCI-based Data Acquisition System for Cosmic Ray Detection Below 10^18 eV
A prototype flash analog-to-digital readout system for cosmic ray detection at energies below 10^18 eV has been designed and tested at Columbia University Nevis Laboratories. The electronics consist of an FADC module that digitizes 16 photomultipli...
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The brightest X-ray AGNs at redshift $3\lesssim z \lesssim 6$
Given recent X-ray observations of high-redshift active galactic nuclei (AGNs), we consider whether the extreme luminosities of these AGNs are consistent with current semi-analytical models. In particular, we apply extreme-value statistics (EVS) to o...