cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Perception On Covid-19 Pandemic As A Social Strain On Society Impact On Education, Challenges And Lessons To Learn.pdf
Creators: name: Orji, Evelyn   Ijeoma
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 399999
subject: Other education not elsewhere classified

description: The disease COVID-19 was so named by the international committee on taxonomy of viruses (ICTV). The disease is of Severe Acute Respiratory Syndrome-Corona Virus-2 Strain (SARS?COV-2) which causes dysfunction of the immune system of an infected person. Anybody can be infected by this disease. Most affected are people with diagnosed health conditions such as; disease of the lung and diabetes. Symptom of COVID-19 is known to appear 2-14 days after exposure to the disease. COVID-19 is known as novel because of its virulence and unprecedented speed of transfer from one person to another and the rapid spread in the entire world killing in thousands. The positivity of the negative impact from COVID-19 on society and humanity led to the declaration of the disease at a public health emergency. Sadly COVID-19 and its delta variance in recent time has remained a canker worm eating off the fabric of society. COVID-19 pandemic era and post COVID-19 era has proven to be a social strain on society in all aspect of the economy globally and locally as in the case in Nigeria. This paper shares the researcher’s perception on COVID-19 pandemic, its impact on education. Some psychosocial consequences, challenges and lessons to learn are also enumerated. It is concluded that COVID-19 pandemic impacted the society to an extent that it is regarded by the researcher as a social strain.
Hyperbolic limit on the early arrival time of bright pulses from PSR~J0835$-$4510 (Vela)
Creators: name: Mahida, Angiraben D.
name: Palfreyman, J. L.
name: Calves, G. Molera
name: Sett, Susmita
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Astronomers have studied the Vela pulsar (PSR~J0835$-$4510) for decades. This study analyses almost one hundred hours of single-pulse data collected over three consecutive days from 2016 and 2020. The work investigates the fascinating phenomena of the earlier arrival of brighter pulses with their increase in peak intensity. We found a hyperbolic relation between them by constructing integrated pulse profiles using flux density intervals and examining the relationship between pulse arrival time and intensity. We identified a phase limit of $-0.85~\pm 0.0109$~ms for the earliest arrival of the brightest pulses. This study offers exciting prospects for further exploring the emission regions responsible for the Vela pulsar's regular and giant micro-pulses.
description: 9 pages, 11 figures
De experiencias y elecciones: narrativas de adolescentes adoptadas en el área metropolitana de Buenos Aires, Argentina
Creators: name: Ciordia, Carolina
Publisher: name: Confluenze. Rivista di Studi Iberoamericani
Year: 2022

description: Desde una perspectiva antropológica se analiza cómo las adolescentes han significado sus propias adopciones focalizando en dos aspectos del proceso de adopción: cómo tomaron conocimiento de la existencia de la adopción como posible desenlace para su trayectoria personal, construyendo así un saber experiencial; y las experiencias asociadas al sufrimiento que atravesaron en los dispositivos institucionales de cuidado donde fueron alojadas y en los desenlaces de sus adopciones. El dolor y el sufrimiento que atravesaron las adolescentes adoptadas en dichos procesos pueden ser interpretados como etapas en la preparación de los sujetos para un cambio de status.
description: Confluenze. Rivista di Studi Iberoamericani, Vol. 14 No. 2 (2022): Escapes of/from the queer in Ibero-America: aesthetics, narratives, political imagination of sex-gender dissidence
Modellbasierte prädiktive Längsdynamikregelung für künftige Fahrerassistenz- und Automatisierungssysteme
Creators: name: Walz, Fabian
Publisher: name: Karlsruher Institut für Technologie (KIT)
Year: 2024
Subjects: Fahrzeugdynamik
Two Point Tire Model
Störungen durch Fahrbahnprofil
Längsregelung
Vorausschau
Vehicle Dynamics
Road Profile Disturbances
Longitudinal Motion Control
Preview

description: Eine grundlegende Anforderung an künftige automatisierte Fahrzeuge besteht darin, dass Absätze und andere Fahrbahnunebenheiten sicher, zuverlässig und präzise überfahren werden. In dieser Arbeit wird ein Konzept für eine modellbasierte, prädiktive Längsdynamikregelung entwickelt und in der Praxis demonstriert, wie die Kenntnis über das vorausliegende Fahrbahnprofil genutzt werden kann, um sowohl die Regelgüte zu steigern als auch die für den Fahrkomfort bedeutsamen Größen zu verbessern.
Intrinsic Superspin Hall Current
Creators: name: Linder, Jacob
name: Amundsen, Morten
name: Risinggård, Vetle
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We discover an intrinsic superspin Hall current: an injected charge supercurrent in a Josephson junction containing heavy normal metals and a ferromagnet generates a transverse spin supercurrent. There is no accompanying dissipation of energy, in contrast to the conventional spin Hall effect. The physical origin of the effect is an antisymmetric spin density induced among transverse modes $k_y$ near the interface of the superconductor arising due to the coexistence of $p$-wave and conventional $s$-wave superconducting correlations with a belonging phase mismatch. Our predictions can be tested in hybrid structures including thin heavy metal layers combined with strong ferromagnets and ordinary $s$-wave superconductors.
description: 8 pages, 6 figures. Included a section on the microscopic origin of the effect in addition to a derivation and physical explanation of how a non-unitary state where singlet and triplet pairing coexist produce a net magnetization
Kaon femtoscopy with Lévy-stable sources from $\sqrt{s_{_{\rm NN}}} = 200$ GeV $\mathrm{Au}+\mathrm{Au}$ collisions at RHIC
Creators: name: Mukherjee, Ayon
Publisher: name: arXiv
Year: 2023
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Femtoscopy has the capacity to probe the space-time geometry of the particle-emitting source in heavy-ion collisions. In particular, femtoscopy of like-sign kaon-pairs may shed light on the origin of non-Gaussianity of the spatial emission probability density. The momentum-correlations between like-sign kaon-pairs are, hence, measured in data recorded by the STAR experiment, from $\sqrt{s_{_{\rm NN}}} = 200$ GeV $\mathrm{Au}+\mathrm{Au}$ collisions at RHIC, BNL. Preliminary results hint at the, possible, existence of non-Gaussian, Lévy-stable sources; and signal the, likely, presence of an anomalous diffusion process; for the identically-charged kaon-pairs so produced. More statistically significant studies, at lower centre-of-mass energies, may contribute to the search for the critical end point of QCD as well.
title: Gauge invariance and the κ–gl relation
Creators: name: Arima, A.
name: Bentz, W.
name: Enders, J.
name: Richter, A.
Publisher: name: IOP Publishing
Year: 2024

description: The connection between the enhancement factor of the photonuclear E1 sum rule and the orbital angular momentum g-factor of a bound nucleon is discussed in the framework of the Landau–Migdal theory for isospin asymmetric nuclear matter, and compared to empirical informations.
Annealing shallow Si/SiO$_2$ interface traps in electron-beam irradiated high-mobility metal-oxide-silicon transistors
Creators: name: Kim, Jin-Sung
name: Tyryshkin, Alexei M.
name: Lyon, Stephen A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Electron-beam (e-beam) lithography is commonly used in fabricating metal-oxide-silicon (MOS) quantum devices but creates defects at the Si/SiO$_2$ interface. Here we show that a forming gas anneal is effective at removing shallow defects ($\leq$ 4 meV below the conduction band edge) created by an e-beam exposure by measuring the density of shallow electron traps in two sets of high-mobility MOS field-effect transistors (MOSFETs). One set was irradiated with an electron-beam (10 keV, 40 $μ$C/cm$^2$) and was subsequently annealed in forming gas while the other set remained unexposed. Low temperature (335 mK) transport measurements indicate that the forming gas anneal recovers the e-beam exposed sample's peak mobility (14,000 cm$^2$/Vs) to within a factor of two of the unexposed sample's mobility (23,000 cm$^2$/Vs). Using electron spin resonance (ESR) to measure the density of shallow traps, we find that the two sets of devices are nearly identical, indicating the forming gas anneal is sufficient to anneal out shallow defects generated by the e-beam exposure. Fitting the two sets of devices' transport data to a percolation transition model, we extract a T=0 percolation threshold density in quantitative agreement with our lowest temperature ESR-measured trap densities.
title: Structure of ⁷He studied with the ⁷Li(d,²He) reaction
Creators: name: Neumann-Cosel, P. von
name: Bäumer, C.
name: Berg, A. M. van den
name: Frekers, D.
name: De Frenne, D.
name: Grewe, E. W.
name: Haefner, P.
name: Jacobs, E.
name: Johanson, H.
name: Kalmykov, Y.
name: Negret, A.
name: Popescu, L.
name: Rakers, S.
name: Richter, A.
name: Ryezayeva, N.
name: Schrieder, G.
name: Shevchenko, A.
name: Wörtche, H. J.
Publisher: name: IOP Publishing
Year: 2024

description: A search for the Jπ = 1/2⁻ spin–orbit partner of the Jπ = 3/2⁻ ground state in ⁷He has been performed with the ⁷Li(d,²He) charge-exchange reaction. The results are incompatible with recent claims of such a state at very low excitation energy [Meister M et al 2002 Phys. Rev. Lett. 88 102501] but rather suggest a resonance with parameters Ex = (1.2⁺⁰.⁵₋₀.₄) MeV, Λ = (1.9⁺⁰.⁸₋₀.₄) MeV. GT strengths deduced for the transitions to the lowest states in 7He are in remarkable agreement with ab initio quantum Monte Carlo calculations.
Comments on Joint Terms in Gravitational Action
Creators: name: Ruan, Shan-Ming
name: Yang, Run-Qiu
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: This paper compares three different methods about computing joint terms in on-shell action of gravity, which are identifying the joint term by the variational principle in Dirichlet boundary condition, treating the joint term as the limit contribution of smooth boundary and finding the joint term by local SO(1,$d-1$) transformation. In general metric gravitational theory, we show that the differences between these joint terms are some variational invariants under fixed boundary condition. We also give an explicit condition to judge the existence of joint term determined by variational principle and apply it into general relativity as an example.
description: Published version with little modifications compared with previous one
title: Expressionist visions of war trauma: male bodies in the sketches of Erich Heckel and Max Beckmann (1914-1918)
Creators: name: Jankuliaková, Jana
Publisher: name: University of Glasgow
Year: 2023

description: This thesis examines the impact of traumatic war experience on gender identity, body integrity and welfare of German soldiers enlisted in the First World War (1914-1918) through a rigorous analysis of the sketches of the German Expressionist artists Erich Heckel (18831970) and Max Beckmann (1888-1950). The artists actively engaged with men affected by physical and psychological trauma during their service as medical orderlies in military hospitals and medical stations on Eastern and Western Fronts, and they created hundreds of intimate sketches exploring how these men articulated their pain and exhaustion arising from the lasting conflict. This thesis seeks to develop a critical framework for a rigorous analysis of the traumatised male body within the context of Expressionist art practice and early twentieth century medical discourse. It explores comparatively how the artists’ sketches reflect a radical shift in the way the male body had been perceived and represented within the medical, social and cultural contexts prior to and during the First World War. The thesis makes use of interdisciplinary perspectives including art history, literature, sociology of the body and sexuality and medical humanities, all of which are relevant to a cogent understanding of war trauma and post-traumatic subjectivity and their impact on cultural images of masculinity in the German context of 1914-1918.
Anomalous Quantum Correlations of Squeezed Light
Creators: name: Kühn, B.
name: Vogel, W.
name: Mraz, M.
name: Köhnke, S.
name: Hage, B.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Three different noise moments of field strength, intensity, and their correlations are simultaneously measured. For this purpose a homodyne cross-correlation measurement [W. Vogel, Phys. Rev. A 51, 4160 (1995)] is implemented by superimposing the signal field and a weak local oscillator on an unbalanced beam splitter. The relevant information is obtained via the intensity noise correlation of the output modes. Detection details like quantum efficiencies or uncorrelated dark noise are meaningless for our technique. Yet unknown insight in the quantumness of a squeezed signal field is retrieved from the anomalous moment, correlating field strength with intensity noise. A classical inequality including this moment is violated for almost all signal phases. Precognition on quantum theory is superfluous, as our analysis is solely based on classical physics.
description: 9 pages, 4 figures
Light pollution is skyrocketing
Creators: name: Falchi, Fabio
name: Bará, Salvador
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Artificial light at night is a pollutant that is rising fast, as demonstrated by Kyba et al. (1) work by analyzing ten of thousands observations by citizen scientists in the last 12 years. The study found that the dimmest stars are vanishing, progressively hidden by a 10 percent yearly increase of the sky background due to artificial lights. This increase is difficult to be detected by the global coverage satellites now in operation, due to detector's blindness to the blue peak of white LEDs that are progressively replacing older technology lamps. This shows the need for a satellite with nighttime multi band capability in the visible light to study and control future evolution. More importantly, a call for a strong reverse in the light pollution rising trend is extremely urgent to avoid all the cultural, scientific, energetic, ecological and health negative effects of artificial nightlights.
description: 2 pages, not edited version of the article published in Science
The Kepler Follow-Up Observation Program. I. A Catalog of Companions to Kepler Stars from High-Resolution Imaging
Creators: name: Furlan, E.
name: Ciardi, D. R.
name: Everett, M. E.
name: Saylors, M.
name: Teske, J. K.
name: Horch, E. P.
name: Howell, S. B.
name: van Belle, G. T.
name: Hirsch, L. A.
name: Gautier, T. N. III
name: Adams, E. R.
name: Barrado, D.
name: Cartier, K. M. S.
name: Dressing, C. D.
name: Dupree, A. K.
name: Gilliland, R. L.
name: Lillo-Box, J.
name: Lucas, P. W.
name: Wang, J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present results from high-resolution, optical to near-IR imaging of host stars of Kepler Objects of Interest (KOIs), identified in the original Kepler field. Part of the data were obtained under the Kepler imaging follow-up observation program over seven years (2009 - 2015). Almost 90% of stars that are hosts to planet candidates or confirmed planets were observed. We combine measurements of companions to KOI host stars from different bands to create a comprehensive catalog of projected separations, position angles, and magnitude differences for all detected companion stars (some of which may not be bound). Our compilation includes 2297 companions around 1903 primary stars. From high-resolution imaging, we find that ~10% (~30%) of the observed stars have at least one companion detected within 1" (4"). The true fraction of systems with close (< ~4") companions is larger than the observed one due to the limited sensitivities of the imaging data. We derive correction factors for planet radii caused by the dilution of the transit depth: assuming that planets orbit the primary stars or the brightest companion stars, the average correction factors are 1.06 and 3.09, respectively. The true effect of transit dilution lies in between these two cases and varies with each system. Applying these factors to planet radii decreases the number of KOI planets with radii smaller than 2 R_Earth by ~2-23% and thus affects planet occurrence rates. This effect will also be important for the yield of small planets from future transit missions such as TESS.
description: Published in AJ; 33 pages; ascii files with Tables 2,3,8,9,10 are available; added references column to Tables 3 and 8 for v3
title: Covariant density functional theory for isospin properties of nuclei far from stability
Creators: name: Ring, P.
name: Lalazissis, G. A.
name: Nikšić, T.
name: Paar, N.
name: Vretenar, D.
Publisher: name: IOP Publishing
Year: 2024

description: The standard relativistic mean-field density functionals based on non-linear meson exchange terms are extended to include density dependent meson-nucleon coupling constants. Special care is taken for the density dependence in the isovector channel. This provides not only an improved description of the equation of state for neutron matter and asymmetric nuclear matter but also for isovector properties of finite nuclei far from stability such as the neutron skin thickness. In particular it improves nuclear binding energies considerably as compared earlier applications of relativistic density functional theory to nuclear mass tables. An average root mean square deviation of 900 keV is found.
title: Nuclear spectroscopy with fast exotic beams
Creators: name: Gade, A.
name: Bazin, D.
name: Brown, B. A.
name: Campbell, C. M.
name: Church, J. A.
name: Dinca, D. C.
name: Enders, J.
name: Glasmacher, T.
name: Hansen, P. G.
name: Honma, M.
name: Mizusaki, T.
name: Mueller, W. F.
name: Olliver, H.
name: Otsuka, T.
name: Riley, L. A.
name: Terry, J. R.
name: Tostevin, J. A.
name: Yurkewicz, K. L.
Publisher: name: IOP Publishing
Year: 2024

description: Quadrupole collectivity in the proximity of the doubly-magic shell closure at N = Z = 28 has been studied using intermediate-energy Coulomb excitation of ⁵⁴,⁵⁶,⁵⁹Ni and ⁵²Fe. The results will be summarized and discussed in comparison to large-scale shell model calculations.
 
A complementary experimental approach sensitive to the single-particle structure of exotic nuclei, one-neutron knockout at intermediate beam energies, has been applied to the proton-rich N = 16 isotones ³⁴Ar, ³³Cl and ³²S as well as to ³²Ar where the knockout residue ³¹Ar is the last particle-bound Z = 18 isotope. The reduction of single-particle strength (‘‘quenching’’) compared to shell-model calculations using the USD interaction is discussed in the framework of correlation effects beyond effective-interaction theory.
Methodology for generating synthetic labeled datasets for visual container inspection
Creators: name: Delgado, Guillem
name: Cortés, Andoni
name: García, Sara
name: Loyo, Estíbaliz
name: Berasategi, Maialen
name: Aranjuelo, Nerea
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Nowadays, containerized freight transport is one of the most important transportation systems that is undergoing an automation process due to the Deep Learning success. However, it suffers from a lack of annotated data in order to incorporate state-of-the-art neural network models to its systems. In this paper we present an innovative methodology to generate a realistic, varied, balanced, and labelled dataset for visual inspection task of containers in a dock environment. In addition, we validate this methodology with multiple visual tasks recurrently found in the state of the art. We prove that the generated synthetic labelled dataset allows to train a deep neural network that can be used in a real world scenario. On the other side, using this methodology we provide the first open synthetic labelled dataset called SeaFront available in: https://datasets.vicomtech.org/di21-seafront/readme.txt.
Beam Search Strategies for Neural Machine Translation
Creators: name: Freitag, Markus
name: Al-Onaizan, Yaser
Publisher: name: arXiv
Year: 2017
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: The basic concept in Neural Machine Translation (NMT) is to train a large Neural Network that maximizes the translation performance on a given parallel corpus. NMT is then using a simple left-to-right beam-search decoder to generate new translations that approximately maximize the trained conditional probability. The current beam search strategy generates the target sentence word by word from left-to- right while keeping a fixed amount of active candidates at each time step. First, this simple search is less adaptive as it also expands candidates whose scores are much worse than the current best. Secondly, it does not expand hypotheses if they are not within the best scoring candidates, even if their scores are close to the best one. The latter one can be avoided by increasing the beam size until no performance improvement can be observed. While you can reach better performance, this has the draw- back of a slower decoding speed. In this paper, we concentrate on speeding up the decoder by applying a more flexible beam search strategy whose candidate size may vary at each time step depending on the candidate scores. We speed up the original decoder by up to 43% for the two language pairs German-English and Chinese-English without losing any translation quality.
description: First Workshop on Neural Machine Translation, 2017
Adaptive discretization refinement for discrete models of coupled mechanics and mass transport in concrete
Creators: name: Mašek, Jan
name: Květon, Josef
name: Eliáš, Jan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: An adaptive discretization refinement strategy for steady state discrete mesoscale models of coupled mechanics and mass transport in concrete is presented. Coupling is provided by two phenomena: the Biot's theory of poromechanics and an effect of cracks on material permeability coefficient. The model kinematics is derived from rigid body motion of Voronoi cells obtained by tessellation of the domain. Starting with a coarse discretization, the density of Voronoi generator points is adaptively increased on the fly in regions where the maximum principal stress exceeds a chosen threshold. Purely elastic behavior is assumed in the coarse discretization, therefore no transfer of history/state variables is needed. Examples showing (i) computational time savings achieved via the adaptive technique and (ii) an agreement of the outputs from the fine and adaptive models during simulations of hydraulic fracturing and three-point bending combined with a fluid pressure loading are presented.
description: 25 pages, 13 figures
Intrinsic ferromagnetism and quantum anomalous Hall effect in CoBr2 monolayer
Creators: name: Chen, Peng
name: Zou, Jin-Yu
name: Liu, Bang-Gui
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The electronic, magnetic, and topological properties of CoBr2 monolayer are studied in the frame-work of the density-functional theory (DFT) combined with tight-binding (TB) modeling in terms of Wannier basis. Our DFT investigation and Monte Carlo simulation show that there exists intrinsic two-dimensional ferromagnetism in the CoBr2 monolayer thanks to large out-of-plane magnetocrystalline anisotropic energy. Our further study shows that the spin-orbits coupling makes it become a topologically nontrivial insulator with quantum anomalous Hall effect and topological Chern number C=4, and its edge states can be manipulated by changing the width of its nanoribbons and applying strains. The CoBr2 monolayer can be exfoliated from the layered CoBr2 bulk material because its exfoliation energy is between those of graphene and MoS2 monolayer and it is dynamically stable. These results make us believe that the CoBr2 monolayer can make a promising spintronic material for future high-performance devices.
Early mapping of winter wheat in Henan province of China using time series of Sentinel-2 data
Creators: name: Huang, Xianda
name: Huang, Jianxi
name: Li, Xuecao
name: Shen, Qianrong
name: Chen, Zhengchao
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 20199 Astronomical and Space Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Plant Biology

description: Accurate mapping of winter wheat in its early stages is crucial for crop growth monitoring and crop yield forecasting. However, early mapping of winter wheat using remotely sensed data is challenging because remote sensing observations can only be used for a part of the growth period. In this study, a framework was proposed for early season mapping of winter wheat using spectral and temporal information of Sentinel-2 images. First, time series of temporal and spectral features were derived using Whittaker smoothing. Subsequently, sensitivities of different parameters (i.e. input features, time interval, and length of time-series data) to early mapping were analyzed. Finally, early maps of winter wheat were generated based on optimal parameters. Results show that the earliest identifiable timing was delayed as the time interval of the time series increased. Winter wheat can be mapped in the early overwintering period (5 months before harvest) with an overall accuracy of 0.91, which is comparable to that of post-season mapping (0.94). In addition, the misclassification in early mapping was caused by uneven sample spatial patterns, natural conditions, and planting management; however, most errors can be gradually amended during the green-up and jointing periods, and the overall accuracy remained stable after the jointing stage. This study demonstrates that it is feasible to implement large-scale early mapping of winter wheat using satellite observations. The proposed approach potentially provides a reference for early mapping of other crop types in agricultural regions worldwide.
Circumcentering the Douglas--Rachford method
Creators: name: Behling, Roger
name: Cruz, Jose Yunier Bello
name: Santos, Luiz-Rafael
Publisher: name: arXiv
Year: 2017
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 49M27, 65K05, 65B99, 90C25

description: We introduce and study a geometric modification of the Douglas-Rach\-ford method called the Circumcentered-Douglas-Rachford method. This method iterates by taking the intersection of bisectors of reflection steps for solving certain classes of feasibility problems. The convergence analysis is established for best approximation problems involving two (affine) subspaces and both our theoretical and numerical results compare favorably to the original Douglas-Rachford method. Under suitable conditions, it is shown that the linear rate of convergence of the Circumcentered-Douglas-Rachford method is at least the cosine of the Friedrichs angle between the (affine) subspaces, which is known to be the sharp rate for the Douglas-Rachford method. We also present a preliminary discussion on the Circumcentered-Douglas-Rachford method applied to the many set case and to examples featuring non-affine convex sets.
Complexity in the light curves and spectra of slow-evolving superluminous supernovae
Creators: name: Inserra, C.
name: Nicholl, M.
name: Chen, T. -W.
name: Jerkstrand, A.
name: Smartt, S. J.
name: Krühler, T.
name: Anderson, J. P.
name: Baltay, C.
name: Della Valle, M.
name: Fraser, M.
name: Gal-Yam, A.
name: Galbany, L.
name: Kankare, E.
name: Maguire, K.
name: Rabinowitz, D.
name: Smith, K.
name: Valenti, S.
name: Young, D. R.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: A small group of the newly discovered superluminous supernovae show broad and slowly evolving light curves. Here we present extensive observational data for the slow-evolving superluminous supernova LSQ14an, which brings this group of transients to four in total in the low redshift Universe (z$
description: Paper accepted by MNRAS on 31/03/2017
title: Magnetic dipole and Gamow–Teller modes: quenching, fine structure and astrophysical implications
Creators: name: Richter, A.
Publisher: name: IOP Publishing
Year: 2024

description: The magnetic dipole (M1) and Gamow–Teller (GT) response are prime examples to illustrate the importance of configuration mixing for an understanding of elementary excitation modes of the nucleus. Starting from the ’’classical’’ problem of quenching - whose proper description is still beyond the capabilities of microscopic models after all those years — I want to address some current developments of the field. Mandatory for the progress are high-resolution data from electron and hadron scattering and charge-exchange reactions.
 
In medium-mass fp-shell nuclei, the detailed knowledge of the M1 and GT strength distribution provides a stringent test of state-of-the-art shell-model calculations, validating their applicability in astrophysical network calculations. As an example, it is demonstrated that high-precision M1 data on N = 28 isotones from electron scattering at Darmstadt permit the extraction of neutral-current neutrino-nucleus scattering cross sections important for supernova dynamics and nucleosynthesis.
 
Fine structure of the GT mode is not only observed in light and medium-mass nuclei, but also in the GT resonance observed in a heavy nucleus like ⁹⁰Nb studied in the ⁹⁰Zr(³He, t) reaction at Osaka with a resolution ΔE ≃ 50 keV (FWHM). Novel methods, based on wavelet transforms, to extract scales characterizing the fine structure are presented. This in turn permits an interpretation of the physics underlying the phenomenon. These methods can also be used to extract spin- and parity-resolved level densities in a nearly model-independent way, again important to test models used in various astrophysical scenarios.
 
As a final example, the influence of configuration mixing on the GT strength distribution at low energies is investigated for the heavy odd-odd nuclei ¹³⁸La and ¹⁸⁰Ta. The nucleosynthesis of these exotic nuclides, amongst the rarest in nature, is a long-standing problem. A likely source are charged-current neutrino-nucleus reactions which would be dominated by the GT response. However, the main GT resonance lies above the particle threshold and, therefore, does not contribute. Recent measurements of the GT strength distributions in ¹³⁸La and ¹⁸⁰Ta below the particle threshold and their astrophysical implications are discussed.
Constrained RS coding for Low Peak to Average Power Ratio in FBMC -- OQAM Systems
Creators: name: Chunkath, Job
name: Sheeba, V. S.
name: Varghese, Nisha
Publisher: name: arXiv
Year: 2023
Subjects: subject: Information Theory (cs.IT)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Multi-carrier modulation techniques have now become a standard in many communication protocols. Filter bank based multi-carrier (FBMC) generation techniques have been discussed in the literature as a means for overcoming the shortcomings of IFFT/FFT based OFDM system. The Peak to Average Power Ratio (PAPR) is a problem faced by all multi-carrier techniques. This paper discusses the methods for reducing PAPR in a FBMC system while maintaining acceptable Bit Error Rate (BER). A new PAPR minimizing scheme called Constrained Reed Solomon (CRS) coding is proposed. The hybrid techniques using coding and companding are tested for different channel models and is found to yield promising results.
description: 6 pages,6 Figures,2 Tables Journal of Electrical and Electronics Engineering
Don't be left in the dark: Improving LHC searches for dark photons using lepton-jet substructure
Creators: name: Barello, G.
name: Chang, Spencer
name: Newby, Christopher A.
name: Ostdiek, Bryan
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Collider signals of dark photons are an exciting probe for new gauge forces and are characterized by events with boosted lepton jets. Existing techniques are efficient in searching for muonic lepton jets but due to substantial backgrounds have difficulty constraining lepton jets containing only electrons. This is unfortunate since upcoming intensity frontier experiments are sensitive to dark photon masses which only allow electron decays. Analyzing a recently proposed model of kinetic mixing, with new scalar particles decaying into dark photons, we find that existing techniques for electron jets can be substantially improved. We show that using lepton-jet-substructure variables, in association with a boosted decision tree, improves background rejection, significantly increasing the LHC's reach for dark photons in this region of parameter space.
description: 28 pages, 9 figures; v2. As appears in PRD. Added appendix to compare boosted decision tree to a cut-based analysis. Other minor typos corrected
Tracking transient boreal wetland inundation with Sentinel-1 SAR: Peace-Athabasca Delta, Alberta and Yukon Flats, Alaska
Creators: name: Huang, Chang
name: Smith, Laurence C.
name: Kyzivat, Ethan D.
name: Fayne, Jessica V.
name: Ming, Yisen
name: Spence, Christopher
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Medicine
subject: Cell Biology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Cancer
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Plant Biology

description: Accurate and frequent mapping of transient wetland inundation in the boreal region is critical for monitoring the ecological and societal functions of wetlands. Satellite Synthetic Aperture Radar (SAR) has long been used to map wetlands due to its sensitivity to surface inundation and ability to penetrate clouds, darkness, and certain vegetation canopies. Here, we track boreal wetland inundation by developing a two-step modified decision-tree algorithm implemented in Google Earth Engine using Sentinel-1 C-band SAR and Sentinel-2 Multispectral Instrument (MSI) time-series data as inputs. This approach incorporates temporal as well as spatial characteristics of SAR backscatter and is evaluated for the Peace-Athabasca Delta, Alberta (PAD), and Yukon Flats, Alaska (YF) from May 2017 to October 2019. Within these two boreal study areas, we map spatiotemporal patterns in wetland inundation classes of Open Water (OW), Floating Plants (FP), Emergent Plants (EP), and Flooded Vegetation (FV). Temporal variability, frequency, and maximum extents of transient wetland inundation are quantified. Retrieved inundation estimates are compared with in-situ field mapping obtained during the NASA Arctic-Boreal Vulnerability Experiment (ABoVE), and a multi-temporal Landsat-derived surface water map. Over the 2017–2019 study period, we find that fractional inundation area ranged from 18.0% to 19.0% in the PAD, and from 10.7% to 12.1% in the YF. Transient wetland inundation covered ~595 km2 of the PAD, comprising ~9.1% of its landscape, and ~102 km2 of the YF, comprising ~3.6%. The implications of these findings for wetland function monitoring, and estimating landscape-scale methane emissions are discussed, together with limitations and uncertainties of our approach. We conclude that time series of Sentinel-1 C-band SAR backscatter, screened with Sentinel-2 MSI optical imagery and validated by field measurements, offer a valuable tool for tracking transient boreal wetland inundation.
title: Atomic quantum systems in optical micro-structures
Creators: name: Müther, T.
name: Nes, J.
name: Gehrmann, A-L.
name: Volk, M.
name: Ertmer, W.
name: Birkl, G.
name: Gruber, M.
name: Jahns, J.
Publisher: name: IOP Publishing
Year: 2024

description: We present experiments with cold atoms in optical dipole potentials which are directed towards developing an integrated coherent atom optics with micro-optical systems. We describe an experiment on evaporative cooling in a far-detuned optical dipole trap for ⁸⁷Rb. The dipole trap is created by a solid state laser at a wavelength of 1030 nm. To achieve high initial phase space densities allowing for efficient evaporative cooling, we have optimised the loading process from a magneto-optical trap into the dipole trap. Starting with an initial phase space density of 2 × 10⁻⁴ the trap depth was ramped down and temperatures below 200 nK and phase space densities of about 0.2 could be reached. These investigations aim at the creation of an ’all-optical’ BEC based on a simple experimental scheme. As an example for an integrated atom optical system, we present the transport of atoms in a ring-shaped guiding structure, i.e. optical storage ring, for cold atoms which is produced by a micro-fabricated ring lens.
Excitonic mass gap in uniaxially strained graphene
Creators: name: Sharma, Anand
name: Kotov, Valeri N.
name: Neto, Antonio H. Castro
Publisher: name: arXiv
Year: 2017
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the conditions for spontaneously generating an excitonic mass gap due to Coulomb interactions between anisotropic Dirac fermions in uniaxially strained graphene. The mass gap equation is realized as a self-consistent solution for the self-energy within the Hartree-Fock mean-field and static random phase approximations. It depends not only on momentum, due to the long-range nature of the interaction, but also on the velocity anisotropy caused by the presence of uniaxial strain. We solve the nonlinear integral equation self-consistently by performing large scale numerical calculations on variable grid sizes. We evaluate the mass gap at the charge neutrality (Dirac) point as a function of the dimensionless coupling constant and anisotropy parameter. We also obtain the phase diagram of the critical coupling, at which the gap becomes finite, against velocity anisotropy. Our numerical study indicates that with an increase in uniaxial strain in graphene the strength of critical coupling decreases, which suggests anisotropy supports formation of excitonic mass gap in graphene.
description: 8 pages, 5 figures. Accepted Phys. Rev. B version with a new figure and revised text
Annex to the Deliverable Report D5.11: Human biomonitoring in risk assessment: 4th set of examples on the use of HBM in risk assessments of HBM4EU priority chemicals
Creators: name: Mahiout, Selma
name: Santonen, Tiina
Publisher: name: Zenodo
Year: 2022

description: This Annex to “Deliverable Report D5.11: Human biomonitoring in risk assessment: 4th set of examples on the use of HBM in risk assessments of HBM4EU priority chemicals” contains the complete risk assessment reports for most of the work summarized in the deliverable. The rest of the full risk assessment reports are or will be available as scientific journal articles. The Deliverable Report D5.11 is available at https://doi.org/10.5281/zenodo.6984201
description: {"references": ["Ares(2022)4267188 - 09/06/2022"]}
Spatiotemporal inhomogeneity of total column NO2 in a polluted urban area inferred from TROPOMI and Pandora intercomparisons
Creators: name: Park, Jong-Uk
name: Park, Jin-Soo
name: Diaz, Daniel Santana
name: Gebetsberger, Manuel
name: Müller, Moritz
name: Shalaby, Lena
name: Tiefengraber, Martin
name: Kim, Hyun-Jae
name: Park, Sang Seo
name: Song, Chang-Keun
name: Kim, Sang-Woo
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Plant Biology

description: The spatiotemporal inhomogeneity of the total column NO2 amounts (TCN) in the Seoul Metropolitan Area (SMA), Korea, was quantitatively assessed through year-round (October 2019–May 2021) TROPOMI and ground-based Pandora measurements. The average TCN over the SMA was comparable to that of major Chinese megacities, being consistently high (> 0.8 DU; Dobson Unit) during the daytime (10–17 local standard time). The autocorrelation scores of the Pandora-measured TCNs demonstrated high temporal variability attributed to the spatial inhomogeneity of NO2 emissions within the SMA and near-surface advection. Accordingly, the adequate temporal collocation range for Pandora measurements for the intercomparison with the satellite sensors was considered to be ± 5 min to avoid significant uncertainty from the temporal variability (RMSE < 0.1 DU, R2 > 0.96). TROPOMI showed better agreement with conventionally collocated Pandora measurements (0.73 < R2 < 0.76, 26–29% negative bias) than the other two satellite sensors (OMI and OMPS) attributed to its highest spatial resolution. The application of the wind-based collocation revealed that the TROPOMI showed a greater negative bias on the upwind side, which was less affected by anthropogenic emissions from the urban area, than the downwind side, and the increasing distance of the TROPOMI pixel from Pandora was the most critical factor deteriorating the intercomparison scores. The FRESCO-S TROPOMI cloud algorithm update to FRESCO-wide yielded a general increase in TROPOMI TCN, especially in the partially cloudy pixels, leaving only 11% (downwind) and 29% (upwind) negative bias from coincident Pandora measurements. Furthermore, the wind-based collocation method revealed the spatial distribution pattern of NOX (NO + NO2) emissions in the SMA, with significant emission sources in the northeastern and southeastern sides of the ground-based Pandora site in Seoul.
A robust and adaptive spatial-spectral fusion model for PlanetScope and Sentinel-2 imagery
Creators: name: Zhao, Yongquan
name: Liu, Desheng
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Space Science
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Neuroscience
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 20199 Astronomical and Space Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified

description: Satellite sensors usually compromise between their spatial and spectral resolutions due to the limitations of data volume and signal-to-noise ratio, such as the Very High spatial Resolution (VHR) PlanetScope (PS, four or five 3-m bands) and medium spatial resolution (med-resolution) Sentinel-2 (S2, ten 10-m or 20-m bands) constellations. Concomitant with the growing demand for satellite images with ample spatial details and spectral signatures, Spatial-Spectral image Fusion (SSF) is important for blending the spatial resolution of PS and the spectral resolution of S2 to produce synthetic 3-m image products in the ten bands for different applications. However, the existing studies conducted for fusing PS and S2 data present limited spatial and spectral fidelities to original PS and S2 bands. Hence, this study presents a new SSF method named Robust and Adaptive Spatial-Spectral image Fusion Model (RASSFM) for that purpose. RASSFM improves the spatial and spectral fidelities of the results through: (1) combining the spectral mapping and the spectral correlation to obtain the high-quality spatial information sources for the S2 bands, (2) utilizing the neighborhood information considering both spatial and spectral constraints to improve the spectral fidelities of the fused bands. We conducted the SSF tests at the degraded and original spatial resolutions to comprehensively evaluate the proposed RASSFM method. Furthermore, we examined the performance of RASSFM in four study sites with highly mixed regular or desert urban, heterogeneous agricultural, and vegetation-dominated landscapes. Moreover, we compared our method with twenty representative SSF methods developed for similar purposes. The results demonstrate that RASSFM not only outperforms the other methods but has robust performance in different landscapes and comparable accuracies in different bands, thereby advancing the fusion of VHR and med-resolution images from PS and S2, respectively.