cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Lockman Hole project: LOFAR observations and spectral index properties of low-frequency radio sources
Creators: name: Mahony, E. K.
name: Morganti, R.
name: Prandoni, I.
name: van Bemmel, I. M.
name: Shimwell, T. W.
name: Brienza, M.
name: Best, P. N.
name: Brüggen, M.
name: Rivera, G. Calistro
name: de Gasperin, F.
name: Hardcastle, M. J.
name: Harwood, J. J.
name: Heald, G.
name: Jarvis, M. J.
name: Mandal, S.
name: Miley, G. K.
name: Retana-Montenegro, E.
name: Röttgering, H. J. A.
name: Sabater, J.
name: Tasse, C.
name: van Velzen, S.
name: van Weeren, R. J.
name: Williams, W. L.
name: White, G. J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The Lockman Hole is a well-studied extragalactic field with extensive multi-band ancillary data covering a wide range in frequency, essential for characterising the physical and evolutionary properties of the various source populations detected in deep radio fields (mainly star-forming galaxies and AGNs). In this paper we present new 150-MHz observations carried out with the LOw Frequency ARray (LOFAR), allowing us to explore a new spectral window for the faint radio source population. This 150-MHz image covers an area of 34.7 square degrees with a resolution of 18.6$\times$14.7 arcsec and reaches an rms of 160 $μ$Jy beam$^{-1}$ at the centre of the field. As expected for a low-frequency selected sample, the vast majority of sources exhibit steep spectra, with a median spectral index of $α_{150}^{1400}=-0.78\pm0.015$. The median spectral index becomes slightly flatter (increasing from $α_{150}^{1400}=-0.84$ to $α_{150}^{1400}=-0.75$) with decreasing flux density down to $S_{150} \sim$10 mJy before flattening out and remaining constant below this flux level. For a bright subset of the 150-MHz selected sample we can trace the spectral properties down to lower frequencies using 60-MHz LOFAR observations, finding tentative evidence for sources to become flatter in spectrum between 60 and 150 MHz. Using the deep, multi-frequency data available in the Lockman Hole, we identify a sample of 100 Ultra-steep spectrum (USS) sources and 13 peaked spectrum sources. We estimate that up to 21 percent of these could have $z>4$ and are candidate high-$z$ radio galaxies, but further follow-up observations are required to confirm the physical nature of these objects.
description: 26 pages. Accepted for publication in MNRAS
Duplication-Correcting Codes for Data Storage in the DNA of Living Organisms
Creators: name: Jain, Siddharth
name: Farnoud, Farzad
name: Schwartz, Moshe
name: Bruck, Jehoshua
Publisher: name: arXiv
Year: 2016
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: The ability to store data in the DNA of a living organism has applications in a variety of areas including synthetic biology and watermarking of patented genetically-modified organisms. Data stored in this medium is subject to errors arising from various mutations, such as point mutations, indels, and tandem duplication, which need to be corrected to maintain data integrity. In this paper, we provide error-correcting codes for errors caused by tandem duplications, which create a copy of a block of the sequence and insert it in a tandem manner, i.e., next to the original. In particular, we present two families of codes for correcting errors due to tandem-duplications of a fixed length, the first family can correct any number of errors while the second corrects a bounded number of errors. We also study codes for correcting tandem duplications of length up to a given constant $k$, where we are primarily focused on the cases of $k=2,3$. Finally, we provide a full classification of the sets of lengths allowed in tandem duplication that result in a unique root for all sequences.
description: Submitted to IEEE Transactions on Information Theory
Generation of a cold pulsed beam of Rb atoms by transfer from a 3D magneto-optic trap
Creators: name: Chanu, Sapam Ranjita
name: Rathod, Ketan D.
name: Natarajan, Vasant
Publisher: name: arXiv
Year: 2016
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We demonstrate a technique for producing a cold pulsed beam of atoms by transferring a cloud of atoms trapped in a three dimensional magneto-optic trap (MOT). The MOT is loaded by heating a getter source of Rb atoms. We show that it is advantageous to transfer with two beams (with a small angle between them) compared to a single beam, because the atoms stop interacting with the beams in the two-beam technique, which results in a Gaussian velocity distribution. The atoms are further cooled in optical molasses by turning off the MOT magnetic field before the transfer beams are turned on.
description: 9 pages, 7 figures
Suppression of chaos through coupling to an external chaotic system
Creators: name: Chaurasia, Sudhanshu Shekhar
name: Sinha, Sudeshna
Publisher: name: arXiv
Year: 2016
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We explore the behaviour of an ensemble of chaotic oscillators coupled only to an external chaotic system, whose intrinsic dynamics may be similar or dissimilar to the group. Counter-intuitively, we find that a dissimilar external system manages to suppress the intrinsic chaos of the oscillators to fixed point dynamics, at sufficiently high coupling strengths. So, while synchronization is induced readily by coupling to an identical external system, control to fixed states is achieved only if the external system is dissimilar. We quantify the efficacy of control by estimating the fraction of random initial states that go to fixed points, a measure analogous to basin stability. Lastly, we indicate the generality of this phenomenon by demonstrating suppression of chaotic oscillations by coupling to a common hyper-chaotic system. These results then indicate the easy controllability of chaotic oscillators by an external chaotic system, thereby suggesting a potent method that may help design control strategies.
In-orbit performance of AstroSat CZTI
Creators: name: Vadawale, Santosh V.
name: Rao, A. R.
name: Bhattacharya, Dipankar
name: Bhalerao, Varun B.
name: Dewangan, Gulab Chand
name: Vibute, Ajay M.
name: S., Mithun N. P.
name: Chattopadhyay, Tanmoy
name: Sreekumar, S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Cadmium-Zinc-Telluride Imager (CZTI) is one of the five payloads on-board recently launched Indian astronomy satellite AstroSat. CZTI is primarily designed for simultaneous hard X-ray imaging and spectroscopy of celestial X-ray sources. It employs the technique of coded mask imaging for measuring spectra in the energy range of 20 - 150 keV. It was the first scientific payload of AstroSat to be switched on after one week of the launch and was made operational during the subsequent week. Here we present preliminary results from the performance verification phase observations and discuss the in-orbit performance of CZTI.
description: 11 pages, 9 figures in Proc. SPIE. 9905, Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray, 99051G. (July 18, 2016)
Across the Pacific: The Other Side of the China Shock
Creators: name: Liu, Lyujia
Publisher: name: University of Chicago
Year: 2023

description: Exploiting the US’s granting of Permanent Normal Trade Relation (PNTR) to China, this paper examines the effects of the reduction in trade policy uncertainty (TPU) on Chinese manufacturing firms and the associated ex- port and labor markets. I document that a larger reduction in TPU led to a higher share of exports to the US and a higher share of ordinary exports both extensively and intensively. I provide evidence that the granting of PNTR encouraged the transition from processing to ordinary form for ex- ports to the US as well as exports to the world. Firms more exposed to the TPU reduction experienced greater losses in the growth of revenue, profits, wages and labor productivity, which might be explained by the negative externality from the decreased total export growth due to the transition.
Enceladus's and Dione's floating ice shells supported by minimum stress isostasy
Creators: name: Beuthe, Mikael
name: Rivoldini, Attilio
name: Trinh, Antony
Publisher: name: arXiv
Year: 2016
Subjects: subject: Geophysics (physics.geo-ph)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Enceladus's gravity and shape have been explained in terms of a thick isostatic ice shell floating on a global ocean, in contradiction of the thin shell implied by librations. Here we propose a new isostatic model minimizing crustal deviatoric stress, and demonstrate that gravity and shape data predict a $\rm{38\pm4\,km}$-thick ocean beneath a $\rm{23\pm4\,km}$-thick shell agreeing with -- but independent of -- libration data. Isostatic and tidal stresses are comparable in magnitude. South polar crust is only $7\pm4\rm\,km$ thick, facilitating the opening of water conduits and enhancing tidal dissipation through stress concentration. Enceladus's resonant companion, Dione, is in a similar state of minimum stress isostasy. Its gravity and shape can be explained in terms of a $\rm{99\pm23\,km}$-thick isostatic shell overlying a $\rm{65\pm30\,km}$-thick global ocean, thus providing the first clear evidence for a present-day ocean within Dione.
description: Main paper: 14 pages, 4 figures; Supplementary information: 15 pages, 5 figures, 7 tables. Paper accepted for publication in Geophysical Research Letters
The numerical simulation tool for the MAORY multiconjugate adaptive optics system
Creators: name: Arcidiacono, Carmelo
name: Schreiber, Laura
name: Bregoli, Giovanni
name: Diolaiti, Emiliano
name: Foppiani, Italo
name: Agapito, Guido
name: Puglisi, Alfio
name: Xompero, Marco
name: Oberti, Sylvain
name: Cosentino, Giuseppe
name: Lombini, Matteo
name: Butler, Chris R.
name: Ciliegi, Paolo
name: Cortecchia, Fausto
name: Patti, Mauro
name: Esposito, Simone
name: Feautrier, Philippe
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The Multiconjugate Adaptive Optics RelaY (MAORY) is and Adaptive Optics module to be mounted on the ESO European-Extremely Large Telescope (E-ELT). It is a hybrid Natural and Laser Guide System that will perform the correction of the atmospheric turbulence volume above the telescope feeding the Multi-AO Imaging Camera for Deep Observations Near Infrared spectro-imager (MICADO). We developed an end-to-end Monte- Carlo adaptive optics simulation tool to investigate the performance of a the MAORY and the calibration, acquisition, operation strategies. MAORY will implement Multiconjugate Adaptive Optics combining Laser Guide Stars (LGS) and Natural Guide Stars (NGS) measurements. The simulation tool implements the various aspect of the MAORY in an end to end fashion. The code has been developed using IDL and uses libraries in C++ and CUDA for efficiency improvements. Here we recall the code architecture, we describe the modeled instrument components and the control strategies implemented in the code.
description: 6 pages, 1 figure, Proceeding 9909 310 of the conference SPIE Astronomical Telescopes + Instrumentation 2016, 26 June 1 July 2016 Edinburgh, Scotland, UK
The 2011 unrest at Katla volcano: characterization and interpretation of the tremor sources
Creators: name: Sgattoni, Giulia
name: Gudmundsson, Ólafur
name: Einarsson, Páll
name: Lucchi, Federico
name: Li, Ka Lok
name: Sadeghisorkhani, Hamzeh
name: Roberts, Roland
name: Tryggvason, Ari
Publisher: name: arXiv
Year: 2016
Subjects: subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: A 23 hour tremor burst was recorded on July 8-9th 2011 at the Katla subglacial volcano, one of the most active and hazardous volcanoes in Iceland. This was associated with deepening of cauldrons on the ice cap and a glacial flood that caused damage to infrastructure. Increased earthquake activity within the caldera started a few days before and lasted for months afterwards and new seismic activity started on the south flank. No visible eruption broke the ice and the question arose as to whether this episode relates to a minor subglacial eruption with the tremor being generated by volcanic processes, or by the flood. The tremor signal consisted of bursts with varying amplitude and duration. We have identified and described three different tremor phases, based on amplitude and frequency features. A tremor phase associated with the flood was recorded only at stations closest to the river that flooded, correlating in time with rising water level observed at gauging stations. Using back-projection of double cross-correlations, two other phases have been located near the active ice cauldrons and are interpreted to be caused by volcanic or hydrothermal processes. The greatly increased seismicity and evidence of rapid melting of the glacier may be explained by a minor sub-glacial eruption. It is also plausible that the tremor was generated by hydrothermal boiling and/or explosions with no magma involved. This may have been induced by pressure drop triggered by the release of water when the glacial flood started. All interpretations require an increase of heat released by the volcano.
Origins and Impacts of High-Density Symmetry Energy
Creators: name: Li, Bao-An
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: What is nuclear symmetry energy? Why is it important? What do we know about it? Why is it so uncertain especially at high densities? Can the total symmetry energy or its kinetic part be negative? What are the effects of three-body and/or tensor force on symmetry energy? How can we probe the density dependence of nuclear symmetry energy with terrestrial nuclear experiments? What observables of heavy-ion reactions are sensitive to the high-density behavior of nuclear symmetry energy? How does the symmetry energy affect properties of neutron stars, gravitational waves and our understanding about the nature of strong-field gravity? In this lecture, we try to answer these questions as best as we can based on some of our recent work and/or understanding of research done by others. This note summarizes the main points of the lecture.
description: Invited lecture given at the Carpathian Summer School of Physics 2016, Exotic Nuclei and Nuclear Astrophysics (VI), Sinaia, Romania, June 26 to July 9, 2016
Enhanced Information Exclusion Relations
Creators: name: Xiao, Yunlong
name: Jing, Naihuan
name: Li-Jost, Xianqing
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In Hall's reformulation of the uncertainty principle, the entropic uncertainty relation occupies a core position and provides the first nontrivial bound for the information exclusion principle. Based upon recent developments on the uncertainty relation, we present new bounds for the information exclusion relation using majorization theory and combinatoric techniques, which reveal further characteristic properties of the overlap matrix between the measurements.
description: 10 pages, 5 figures
Scalable and Passive Wireless Network Clock Synchronization
Creators: name: Zachariah, Dave
name: Dwivedi, Satyam
name: Händel, Peter
name: Stoica, Petre
Publisher: name: arXiv
Year: 2016
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Clock synchronization is ubiquitous in wireless systems for communication, sensing and control. In this paper we design a scalable system in which an indefinite number of passively receiving wireless units can synchronize to a single master clock at the level of discrete clock ticks. Accurate synchronization requires an estimate of the node positions. If such information is available the framework developed here takes position uncertainties into account. In the absence of such information we propose a mechanism which enables simultaneous synchronization and positioning. Furthermore we derive the Cramer-Rao bounds for the system which show that it enables synchronization accuracy at sub-nanosecond levels. Finally, we develop and evaluate an online estimation method which is statistically efficient.
An interacting quark-diquark model. Strange and nonstrange baryon spectroscopy and other observables
Creators: name: De Sanctis, M.
name: Ferretti, J.
name: Vsevolodovna, R. Magaña
name: Saracco, P.
name: Santopinto, E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We describe the relativistic interacting quark-diquark model formalism and its application to the calculation of strange and nonstrange baryon spectra. The results are compared to the existing experimental data. We also discuss the application of the model to the calculation of other baryon observables, like baryon magnetic moments, open-flavor strong decays and baryon masses with self-energy corrections.
Calculated high-pressure structural properties, lattice dynamics and quasi particle band structures of perovskite fluorides KZnF 3 , CsCaF 3 and BaLiF 3
Creators: name: G, Vaitheeswaran
name: V, Kanchana
name: X, Zhang
name: Y, Ma
name: A, Svane
name: NE, Christensen
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A detailed study of the high-pressure structural properties, lattice dynamics and band structures of perovskite structured fluorides KZnF3, CsCaF3 and BaLiF3 has been carried out by means of density functional theory. The calculated structural properties including elastic constants and equation of state agree well with available experimental information. The phonon dispersion curves are in good agreement with available experimental inelastic neutron scattering data. The electronic structures of these fluorides have been calculated using the quasi particle self-consistent [Formula: see text] approximation. The [Formula: see text] calculations reveal that all the fluorides studied are wide band gap insulators, and the band gaps are significantly larger than those obtained by the standard local density approximation, thus emphasizing the importance of quasi particle corrections in perovskite fluorides.
New Gapless COS G140L Mode Proposed for Background-Limited Far-UV Observations
Creators: name: Redwine, Keith
name: McCandliss, Stephan R.
name: Fleming, Brian
name: France, Kevin
name: Zheng, Wei
name: Osterman, Steven
name: Howk, J. Christopher
name: Anderson, Scott F.
name: Gaensicke, Boris T.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Here we describe the observation and calibration procedure for a new G140L observing mode for the Cosmic Origins Spectrograph (COS) aboard the Hubble Space Telescope (HST). This mode, CENWAV = 800, is designed to move the far-UV band fully onto the Segment A detector, allowing for more e cient ob- servation and analysis by simplifying calibration management between the two channels, and reducing the astigmatism in this wavelength region. We also de- scribe some of the areas of scientific interest for which this new mode will be especially suited.
description: 18 pages, 8 figures. This is an author-created, un-copyedited version of an article accepted for publication/published in Publications of the Astronomical Society of the Pacific. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it
Temperature-dependent photoluminescence characteristics of GeSn epitaxial layers
Creators: name: Pezzoli, Fabio
name: Giorgioni, Anna
name: Patchett, David
name: Myronov, Maksym
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: GeSn epitaxial heterostructures are emerging as prominent candidates for the monolithic integration of light sources on Si substrates. Here we propose a judicious explanation for their temperature-dependent photoluminescence (PL) that is based upon the so far disregarded optical activity of dislocations. By working at the onset of plastic relaxation, which occurs whenever the epilayer releases the strain accumulated during growth on the lattice mismatched substrate, we demonstrate that dislocation nucleation can be explicitly seen in the PL data. Notably, our findings point out that a monotonous thermal PL quenching can be observed in coherent films, in spite of the indirect nature of the GeSn bandgap. Our investigation, therefore, contributes to a deeper understanding of the recombination dynamics in this intriguing group IV alloy and offers insights into crucial phenomena shaping the light emission efficiency.
Software Sustainability Institute 2023 Fellowship Application
Creators: name: Umar, Ahmad
Publisher: name: Zenodo
Year: 2022
Subjects: Software Sustainability Institute
Fellowship
Application
Training
Open Science
Computational genomics

description: This is the application for Software Sustainability Institute 2023 Fellowship Application. I explained my plans for the fellowship as follows To develop bioinformatics and computational genomics course To develop short courses in areas of data science using R & Python To develop short training modules about preprints and open science I would like to be part of the SSI fellowship because the SSI community highly compliments my own goals and passion to promote Open Science and develop the capacity of our local scientists, computationally. This slide deck was presented in video format while making application for the 2023 Software Sustainability Institute Fellowship.
Multiple short-lived stellar prominences on O stars: The O6.5I(n)fp star lambda Cephei
Creators: name: Sudnik, N. P.
name: Henrichs, H. F.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Most O and many B stars show unexplained cyclical variability in their spectral lines, i.e. modulation on the rotational timescale, but not strictly periodic. The variability occurs in the so-called discrete absorption components (DACs) that accelerate through the UV-wind line profiles and also in many optical lines. For such OB stars no dipolar magnetic fields have been detected with upper limits of ~300G. We investigate whether multiple magnetic loops on the surface rather than non-radial pulsations or a dipolar magnetic field can explain the observed cyclical UV and optical spectral line variability. We present time-resolved, high-resolution optical spectroscopy of the O6.5I(n)fp star lambda Cep. We apply a simplified phenomenological model in which multiple spherical blobs attached to the surface represent magnetic-loop structures, which we call stellar prominences, by analogy with solar prominences. We compare the calculated line profiles as a function of rotational phase, adopting a rotation period of 4.1d, with observed relative changes in subsequent quotient spectra. We identify many periodicities in spectral lines, almost none of which is stable over timescales from months to years. We show that the relative changes in various optical absorption and emission lines are often very similar. Our proposed model applied to the HeII 4686 line can typically be fitted with 2-5 equatorial blobs with lifetimes between ~1 and 24h. Given the irregular timescales involved, we propose that the azimuthal distribution of DACs correspond to the locations of stellar prominences attached to the surface. This could explain the observed variability of optical and UV lines, and put constraints on the strength and lifetime of these structures, which can be compared with recent theoretical predictions, in which bright magnetic surface spots are formed by the action of the subsurface convection zone.
description: 30 pages, 48 figures
Data Analytics for Technology Acceptance Monitoring of SBC Technologies (Extended Abstract)
Creators: name: Gkioka, Georgia
name: Mentzas, Gregoris
Publisher: name: Zenodo
Year: 2022
Subjects: Data Analytics, Descriptive Analytics Framework, Technology Acceptance, Smart Border Control Technologies

description: The increasing demand for traveler clearance at Border Crossing Points (BCPs) has motivated research for finding more efficient solutions. Thus, Automated Border Control (ABC) is emerging as a solution to enhance the convenience of travelers, the throughput of BCPs, and national security. Despite the growing interest in novel Smart Border Control (SBC) technologies, there is currently a lack of information regarding their acceptance, both from travelers’ and border control staff’s viewpoint. The goal of our research is to provide a descriptive analytics framework for technology acceptance monitoring of SBCs aiming to enhance policy development and decision support.
Le traitement orthodontique dans l’ostéoporose
Creators: name: Bengana, Bilal
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 320223
subject: Rheumatology and arthritis

description: Le déplacement orthodontique se base sur le métabolisme osseux. En effet, il fait appel aux phénomènes de résorption et d’apposition osseuse. L’ostéoporose, maladie touchant l’adulte le plus souvent mais aussi les enfants dans des conditions particulières, se traduit par un déséquilibre du remodelage osseux en faveur de la résorption ; ceci entraîne une fragilité accrue des os, les exposants aux fractures. Les thérapeutiques actuelles de l’ostéoporose ont toutes une influence sur le métabolisme osseux, avec des mécanismes d’action différents, tantôt agissant sur la résorption tantôt agissant sur la formation. Selon le mode d’action de ces molécules thérapeutiques, il se voit une modification du déplacement dentaire orthodontique et de ce fait, un allongement de la durée du traitement orthodontique. Ce travail tente de décrire la place du traitement orthodontique sur les sujets souffrant d’ostéoporose, mais aussi l’influence de l’ostéoporose ainsi que ses traitements sur le traitement orthodontique.
On Profiling Bots in Social Media
Creators: name: Oentaryo, Richard Jayadi
name: Murdopo, Arinto
name: Prasetyo, Philips Kokoh
name: Lim, Ee-Peng
Publisher: name: arXiv
Year: 2016
Subjects: subject: Social and Information Networks (cs.SI)
subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: The popularity of social media platforms such as Twitter has led to the proliferation of automated bots, creating both opportunities and challenges in information dissemination, user engagements, and quality of services. Past works on profiling bots had been focused largely on malicious bots, with the assumption that these bots should be removed. In this work, however, we find many bots that are benign, and propose a new, broader categorization of bots based on their behaviors. This includes broadcast, consumption, and spam bots. To facilitate comprehensive analyses of bots and how they compare to human accounts, we develop a systematic profiling framework that includes a rich set of features and classifier bank. We conduct extensive experiments to evaluate the performances of different classifiers under varying time windows, identify the key features of bots, and infer about bots in a larger Twitter population. Our analysis encompasses more than 159K bot and human (non-bot) accounts in Twitter. The results provide interesting insights on the behavioral traits of both benign and malicious bots.
Weighted Procrustes problems
Creators: name: Contino, Maximiliano
name: Giribet, Juan
name: Maestripieri, Alejandra
Publisher: name: arXiv
Year: 2016
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: Let $\mathcal{H}$ be a Hilbert space, $L(\mathcal{H})$ the algebra of bounded linear operators on $\mathcal{H}$ and $W \in L(\mathcal{H})$ a positive operator such that $W^{1/2}$ is in the p-Schatten class, for some $1 \leq p< \infty.$ Given $A \in L(\mathcal{H})$ with closed range and $B \in L(\mathcal{H}),$ we study the following weighted approximation problem: analize the existence of $$\underset{X \in L(\mathcal{H})}{min}\Vert AX-B \Vert_{p,W},$$ where $\Vert X \Vert_{p,W}=\Vert W^{1/2}X \Vert_{p}.$ In this paper we prove that the existence of this minimum is equivalent to a compatibility condition between $R(B)$ and $R(A)$ involving the weight $W,$ and we characterize the operators which minimize this problem as $W$-inverses of $A$ in $R(B).$
Estimate on Spin Asymmetry for Drell-Yan Process at Fermilab with Tensor-Polarized Deuteron
Creators: name: Kumano, S.
name: Song, Qin-Tao
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: There are four new structure functions for the spin-1 deuteron in comparison with the ones for the spin-1/2 proton, and they are called $b_1$, $b_2$, $b_3$, and $b_4$. The twist-2 structure functions $b_1$ and $b_2$ are expressed by tensor-polarized parton distribution functions in the deuteron. HERMES measurements of $b_1$ are much different from the prediction of the standard deuteron model with D-state admixture. It indicates that the structure functions $b_1$ and $b_2$ probe an interesting new aspect in the deuteron. There is an approved experiment at JLab to measure $b_1$ and it is expected to start in 2019. On the other hand, the measurement of tensor-polarized distributions is under consideration at Fermilab by the Drell-Yan process with the unpolarized proton beam and tensor-polarized deuteron target. It is expected to provide crucial information on tensor-polarized antiquark distributions. Since the distributions are small quantities, it is important to estimate the tensor-polarized spin asymmetry theoretically to find experimental feasibility for an actual proposal at Fermilab.
description: 4 pages, 3 eps figures, to be published in JPS Conf. Proc., Proceedings of the 14th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon (MENU2016), July 25-30, 2016, Kyoto, Japan
Sparse aperture differential piston measurements using the pyramid wave-front sensor
Creators: name: Arcidiacono, Carmelo
name: Chen, Xinyang
name: Yan, Zhaojun
name: Zheng, Lixin
name: Agapito, Guido
name: Wang, Chaoyan
name: Zhu, Nenghong
name: Zhu, Liyun
name: Cai, Jianqing
name: Tang, Zhenghong
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: In this paper we report on the laboratory experiment we settled in the Shanghai Astronomical Observatory (SHAO) to investigate the pyramid wavefront sensor (WFS) ability to measure the differential piston on a sparse aperture. The ultimate goal is to verify the ability of the pyramid WFS work in closed loop to perform the phasing of the primary mirrors of a sparse Fizeau imaging telescope. In the experiment we installed on the optical bench we performed various test checking the ability to flat the wave-front using a deformable mirror and to measure the signal of the differential piston on a two pupils setup. These steps represent the background from which we start to perform full closed loop operation on multiple apertures. These steps were also useful to characterize the achromatic double pyramids (double prisms) manufactured in the SHAO optical workshop.
description: 10 pages, 9 figures, Proceeding 9909-253 of the SPIE Astronomical Telescopes + Instrumentation 2016, 26 June-1 July 2016 Edinburgh, Scotland, UK
Screening for pancreatic cancer has the potential to save lives, but is it practical?
Creators: name: Mazer, Benjamin L.
name: Lee, Jae W.
name: Roberts, Nicholas J.
name: Chu, Linda C.
name: Lennon, Anne Marie
name: Klein, Alison P.
name: Eshleman, James R.
name: Fishman, Elliot K.
name: Canto, Marcia Irene
name: Goggins, Michael G.
name: Hruban, Ralph H.
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Space Science
subject: Medicine
classificationCode: 59999
subject: Environmental Sciences not elsewhere classified
classificationCode: 39999
subject: Chemical Sciences not elsewhere classified
classificationCode: 69999
subject: Biological Sciences not elsewhere classified
classificationCode: 80699
subject: Information Systems not elsewhere classified
subject: Cancer

description: Most patients with pancreatic cancer present with advanced stage, incurable disease. However, patients with high-grade precancerous lesions and many patients with low-stage disease can be cured with surgery, suggesting that early detection has the potential to improve survival. While serum CA19.9 has been a long-standing biomarker used for pancreatic cancer disease monitoring, its low sensitivity and poor specificity have driven investigators to hunt for better diagnostic markers. This review will cover recent advances in genetics, proteomics, imaging, and artificial intelligence, which offer opportunities for the early detection of curable pancreatic neoplasms. From exosomes, to circulating tumor DNA, to subtle changes on imaging, we know much more now about the biology and clinical manifestations of early pancreatic neoplasia than we did just five years ago. The overriding challenge, however, remains the development of a practical approach to screen for a relatively rare, but deadly, disease that is often treated with complex surgery. It is our hope that future advances will bring us closer to an effective and financially sound approach for the early detection of pancreatic cancer and its precursors.
New model for datasets citation and extraction reproducibility in VAMDC
Creators: name: Zwölf, Carlo Maria
name: Moreau, Nicolas
name: Dubernet, Marie-Lise
Publisher: name: arXiv
Year: 2016
Subjects: subject: Digital Libraries (cs.DL)
subject: Atomic Physics (physics.atom-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: In this paper we present a new paradigm for the identification of datasets extracted from the Virtual Atomic and Molecular Data Centre (VAMDC) e-science infrastructure. Such identification includes information on the origin and version of the datasets, references associated to individual data in the datasets, as well as timestamps linked to the extraction procedure. This paradigm is described through the modifications of the language used to exchange data within the VAMDC and through the services that will implement those modifications. This new paradigm should enforce traceability of datasets, favour reproducibility of datasets extraction, and facilitate the systematic citation of the authors having originally measured and/or calculated the extracted atomic and molecular data.
description: 48 pages
Simulating fast time variations in the supernova neutrino flux in Hyper-Kamiokande
Creators: name: Migenda, Jost
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Hyper-Kamiokande is a proposed next-generation water Cherenkov detector. If a galactic supernova happens, it will deliver a high event rate ($\mathcal{O}(10^5)$ neutrino events in total) as well as event-by-event energy information. Recent supernova simulations exhibit the Standing Accretion Shock Instability (SASI) which causes oscillations in the number flux and mean energy of neutrinos. The amplitude of these oscillations is energy-dependent, so the energy information available in Hyper-Kamiokande could be used to improve the detection prospects of these SASI oscillations. To determine whether this can be achieved in the presence of detector effects like backgrounds and finite energy uncertainty, we have started work on a detailed simulation of Hyper-Kamiokande's response to a supernova neutrino burst.
description: 3 pages, 2 figures. Presented as a poster at Neutrino 2016, proceedings to be published in Journal of Physics: Conference Series
New in the optical spectrum and kinematic state of the atmosphere of the variable V1027\,Cyg (= IRAS 20004+2955)
Creators: name: Klochkova, V. G.
name: Panchuk, V. E.
name: Tavolganskaya, N. S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Based on high-resolution spectroscopy performed with the NES echelle spectrograph of the 6-m telescope, we have studied the peculiarities of the spectrum and the velocity field in the atmosphere and envelope of the cool supergiant V1027 Cyg, the optical counterpart of the infrared source IRAS 20004+2955. For the first time, a splitting of the cores of strong absorptions of metals and their ions (SiII, NiI, TiI, TiII, ScII, CrI, FeI, FeII, BaII) has been detected in the stellar spectrum. The broad profile of these lines contains a stable weak emission in the core whose position may be considered as the systematic velocity Vsys=5.5 km/s. Small radial velocity variations with an amplitude of 5-6 km/s due to pulsations have been revealed by symmetric low- and moderate-intensity absorptions. A long-wavelength shift of the H$α$ profile due to line core distortion is observed in the stellar spectrum. Numerous weak CN molecular lines and the KI 7696 Å line with a P Cyg profile have been identified in the red spectral region. The coincidence of the radial velocities measured from symmetric metal absorptions and CN lines suggests that the CN spectrum is formed in the stellar atmosphere. We have also identified numerous diffuse interstellar bands (DIBs) whose positions in the spectrum, Vr(DIBs)=$-12.0$ km/s, correspond to the velocity of the interstellar medium in the Local arm of the Galaxy.
description: 15 pages, 6 figures, 2 tables
Maximizing device-independent randomness from a Bell experiment by optimizing the measurement settings
Creators: name: Assad, Syed M
name: Thearle, Oliver
name: Lam, Ping Koy
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The rates at which a user can generate device-independent quantum random numbers from a Bell-type experiment depend on the measurements that he performs. By numerically optimising over these measurements, we present lower bounds on the randomness generation rates for a family of two-qubit states composed from a mixture of partially entangled states and the completely mixed state. We also report on the randomness generation rates from a tomographic measurement. Interestingly in this case, the randomness generation rates are not monotonic functions of entanglement.
Dark tip-tilt sensing
Creators: name: Arcidiacono, Carmelo
name: Ragazzoni, Roberto
name: Viotto, Valentina
name: Bergomi, Maria
name: Farinato, Jacopo
name: Magrin, Demetrio
name: Dima, Marco
name: Gullieuszik, Marco
name: Marafatto, Luca
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Dark wavefront sensing in its simplest and more crude form is a quad-cell with a round spot of dark ink acting as occulting disk at the center. This sensor exhibits fainter limiting magnitude than a conventional quad-cell, providing that the size of the occulting disk is slightly smaller than the size of the spot and smaller than the residual jitter movement in closed loop. We present simulations focusing a generic Adaptive Optics system using Natural Guide Stars to provide the tip-tilt signal. We consider a jitter spectrum of the residual correction including amplitudes exceeding the dark disk size.
description: 8 pages, 7 figures, Proceeding 9909-252 of the SPIE Astronomical Telescopes + Instrumentation 2016, 26 June-1 July 2016 Edinburgh, Scotland, UK
Bridging thermal and electrical transport in dielectric nanostructure based polar colloids
Creators: name: Dhar, Purbarun
name: Pattamatta, Arvind
name: Das, Sarit K.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Heat and charge transport characteristics of nanocolloids have been bridged from fundamental analysis. The relationship between the two transport phenomena in dielectric nanostructure based polar colloids has been quantitatively presented. An extensional intuitive analogy to the Wiedemann Franz law has been drawn. Derived from the fact that mobile electrons transport both heat and charge within metallic crystal structure, the analogy can be extended to nanocolloids, wherein the dispersed population act as the major transporter. The analogy allows modeling the relationship between the two phenomena and sheds more insight and conclusive evidence that nanoparticle traversal within the fluid domain is the main source of augmented transport phenomena exhibit by nanocolloids. Important factors such as the thermal and dielectric responses of the nanocolloid can be quantified and bridged through the semi analytical formalism. The theoretical analysis has been validated against experimental data and variant scientific literature and good accuracy has been observed.
The quenching of the star formation activity in cluster galaxies
Creators: name: Boselli, A.
name: Roehlly, Y.
name: Fossati, M.
name: Buat, V.
name: Boissier, S.
name: Boquien, M.
name: Burgarella, D.
name: Ciesla, L.
name: Gavazzi, G.
name: Serra, P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We study the star formation quenching mechanism in cluster galaxies by fitting the SED of the Herschel Reference Survey, a complete volume-limited K-band-selected sample of nearby galaxies including objects in different density regions, from the core of the Virgo cluster to the general field. The SED are fitted using the CIGALE SED modelling code. The truncated activity of cluster galaxies is parametrised using a specific SFH with 2 free parameters, the quenching age QA and the quenching factor QF. These 2 parameters are crucial for the identification of the quenching mechanism which acts on long timescales if starvation while rapid and efficient if ram pressure. To be sensitive to an abrupt and recent variation of the star formation activity, we combine in a new way 20 UV to FIR photometric bands with 3 age-sensitive Balmer line absorption indices extracted from available medium-resolution integrated spectroscopy and with Halpha narrow band imaging data. The use of a truncated SFH significantly increases the quality of the fit in those objects whose atomic gas content has been removed during the interaction with the hostile cluster environment. The typical QA of the perturbed late-type galaxies is QA < 300 Myr whenever the activity of star formation is reduced by 50% < QF <= 80% and QA < 500 Myr for QF > 80%, while that of the quiescent early-types is QA ~ 1-3 Gyr. The fraction of late-types with a star formation activity reduced by QF > 80% and with an HI-deficiency parameter HI-def > 0.4 drops by a factor of ~ 5 from the inner half virial radius of the Virgo cluster, where the hot diffuse X-ray emitting gas of the cluster is located, to the outer regions. The efficient quenching of the star formation activity observed in Virgo suggests that the dominant stripping process is ram pressure. We discuss the implication of this result in the cosmological context of galaxy evolution.
description: Accepted fro publication on Astronomy & Astrophysics
Multi-Die Heterogeneous FPGAs: How Balanced Should Netlist Partitioning Be?
Creators: name: Raikar, Raveena
name: Stroobandt, Dirk
Publisher: name: Zenodo
Year: 2022

description: High-capacity multi-die FPGA systems generally consist of multiple dies connected by external interposer lines. These external connections are limited in number. Further, these connections also contribute to a higher delay as compared to the internal network on a monolithic FPGA and should therefore be sparsely used. These architectural changes compel the placement & routing tools to minimize the number of signals at the die boundary. Incorporating a netlist partitioning step in the CAD flow can help to minimize the overall number of cross-die connections.
 Conventional partitioning techniques focus on minimizing the cut edges at the cost of generating unequal-sized partitions. Such highly unbalanced partitions can affect the overall placement & routing quality by causing congestion on the denser die. Moreover, this can also negatively impact the overall runtime of the placement & routing tools as well as the FPGA resource utilization.
 In previous studies, a low value of the unbalance was proposed to generate equal-sized partitions. In this work, we investigate the factors that influence the netlist partitioning quality for a multi-die FPGA system. A die-level partitioning step, performed using hMETIS, is incorporated into the flow before the packing step. Large heterogeneous circuits from the Koios benchmark suite are used to analyze the partitioning-packing results. Consequently, we examine the variation in output unbalance, the number of cut edges and die-size vs the input value of unbalance. We propose an optimal parametric value of the unbalance factor based on the findings for achieving the desired partitioning quality.
The Moutard transformation of two-dimensional Dirac operators and conformal geometry of surfaces in the four-space
Creators: name: Matuev, R. M.
name: Taimanov, I. A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The Moutard transformation for a two-dimensional Dirac operator with a complex-valued potential is constructed. It is showed that this transformation relates the potentials of Weierstrass representations of surfaces related by a composition of the inversion and a reflection with respect to an axis. It is given an analytical description of an explicit example of such a transformation which results in a creation of double points on the spectral curve of a Dirac operator with a double-periodic potential.
description: 15 pages
Determination of Inelastic Mean Free Paths  in Elemental Solids in the 200 to 5000 eV Energy Range by Absolute Elastic Peak Electron Spectroscopy
Creators: name: Tanuma，S
name: Okamoto, N
name: Azuma, Y
name: Kimura, T
name: Goto, K
Publisher: name: Czech Vacuum Society
Year: 2006
Subjects: IMFP
TPP-2M
AES
XPS

description: Recently Goto have done a precise measurement of transmission efficiency using a new method. Then, we have carried out the experimental determinations of IMFPs for 14 elemental solids in the 200-5000 eV energy range from absolute backscattered elastic-peak intensities taken by a novel CMA together with Monte Carlo (MC) calculations and also calculated IMFPs of the elemental solids with the Penn algorithm. At relatively high-energy region (over 200 eV), the values of energy/IMFP versus log (E) should be a straight line (Fano Plot). Then, we present an evaluation of the correction equations for surface-electron excitation proposed by Werner et. al., Oswald and Chen et. al. using Fano Plots.