cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Relationship among state reopening policies, health outcomes and economic recovery through first wave of the COVID-19 pandemic in the U.S
Creators: name: Ligo, Alexandre K.
name: Mahoney, Emerson
name: Cegan, Jeffrey
name: Trump, Benjamin D.
name: Jin, Andrew S.
name: Kitsak, Maksim
name: Keenan, Jesse
name: Linkov, Igor
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Economics (econ.GN)
subject: FOS: Economics and business

description: State governments in the U.S. have been facing difficult decisions involving tradeoffs between economic and health-related outcomes during the COVID-19 pandemic. Despite evidence of the effectiveness of government-mandated restrictions mitigating the spread of contagion, these orders are stigmatized due to undesirable economic consequences. This tradeoff resulted in state governments employing mandates in widely different ways. We compare the different policies states implemented during periods of restriction (lockdown) and reopening with indicators of COVID-19 spread and consumer card spending at each state during the first wave of the pandemic in the U.S. between March and August 2020. We find that while some states enacted reopening decisions when the incidence rate of COVID-19 was minimal or sustained in its relative decline, other states relaxed socioeconomic restrictions near their highest incidence and prevalence rates experienced so far. Nevertheless, all states experienced similar trends in consumer card spending recovery, which was strongly correlated with reopening policies following the lockdowns and relatively independent from COVID-19 incidence rates at the time. Our findings suggest that consumer card spending patterns can be attributed to government mandates rather than COVID-19 incidence in the states. We estimate the recovery in states that reopened in late April was more than the recovery in states that did not reopen in the same period - 15% for consumer card spending and 18% for spending by high income households. This result highlights the important role of state policies in minimizing health impacts while promoting economic recovery and helps planning effective interventions in subsequent waves and immunization efforts.
description: Revised on October 4, 2021
Richard Hunter/Antonios Rengakos/Evina Sistakou (Hgg.), Hellenistic Studies at a Crossroads. Exploring Texts, Contexts and Metatexts
Creators: name: Bär, Silvio
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Richard Hunter/Antonios Rengakos/Evina Sistakou (Hgg.), Hellenistic Studies at a Crossroads. Exploring Texts, Contexts and Metatexts. Trends in Classics Suppl. Bd. 25. Berlin/Boston: Walter de Gruyter 2014, VIII + 379 S.
description: Göttinger Forum für Altertumswissenschaft, Bd. 18 (2015): Göttinger Forum für Altertumswissenschaft
Surface science motivated by heating of trapped ions from the quantum ground state
Creators: name: Hite, D. A.
name: McKay, K. S.
name: Pappas, D. P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: For the past two and a half decades, anomalous heating of trapped ions from nearby electrode surfaces has continued to demonstrate unexpected results. Caused by electric-field noise, this heating of the ions' motional modes remains an obstacle for scalable quantum computation with trapped ions. One of the anomalous features of this electric-field noise is the reported nonmonotonic behavior in the heating rate when a trap is incrementally cleaned by ion bombardment. Motivated by this result, the present work reports on a surface analysis of a sample ion-trap electrode treated similarly with incremental doses of Ar$^+$ ion bombardment. Kelvin probe force microscopy and x-ray photoelectron spectroscopy were used to investigate how the work functions on the electrode surface vary depending on the residual contaminant coverage between each treatment. It is shown that the as-fabricated Au electrode is covered with a hydrocarbon film that is modified after the first treatment, resulting in work functions and core-level binding energies that resemble that of atomic-like carbon on Au. Changes in the spatial distribution of work functions with each treatment, combined with a suggested phenomenological coverage and surface-potential roughness dependence to the heating, appear to be related to the nonmonotonic behavior previously reported.
description: 18 pages, 6 figures. New J. Phys. (2021)
The symmetric action on secondary homotopy groups
Creators: name: Baues, Hans-Joachim
name: Muro, Fernando
Publisher: name: arXiv
Year: 2006
Subjects: subject: Algebraic Topology (math.AT)
subject: Category Theory (math.CT)
subject: FOS: Mathematics
subject: 55Q25; 55S45

description: We show that the symmetric track group, which is an extension of the symmetric group associated to the second Stiefel- Withney class, acts as a crossed module on the secondary homotopy group of a pointed space. An application is given to cup-one products in unstable homotopy groups of spheres, generalizing a formula of Barratt-Jones-Mahowald.
description: We correct a misprint in the presentation of the symmetric track groups
Observing intermediate-mass black holes and the upper--stellar-mass gap with LIGO and Virgo
Creators: name: Mehta, Ajit Kumar
name: Buonanno, Alessandra
name: Gair, Jonathan
name: Miller, M. Coleman
name: Farag, Ebraheem
name: deBoer, R. J.
name: Wiescher, M.
name: Timmes, F. X.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Using ground-based gravitational-wave detectors, we probe the mass function of intermediate-mass black holes (IMBHs) wherein we also include BHs in the upper mass gap $\sim 60-130~M_\odot$. Employing the projected sensitivity of the upcoming LIGO and Virgo fourth observing (O4) run, we perform Bayesian analysis on quasi-circular non-precessing, spinning IMBH binaries (IMBHBs) with total masses $50\mbox{--} 500\, M_\odot$, mass ratios 1.25, 4, and 10, and dimensionless spins up to 0.95, and estimate the precision with which the source-frame parameters can be measured. We find that, at $2σ$, the mass of the heavier component of IMBHBs can be constrained with an uncertainty of $\sim 10-40\%$ at a signal-to-noise ratio of $20$. Focusing on the stellar-mass gap with new tabulations of the $^{12}\text{C}(α, γ)^{16} \text{O}$ reaction rate and its uncertanties, we evolve massive helium core stars using \MESA\, to establish the lower and upper edge of the mass gap as $\simeq$\,59$^{+34}_{-13}$\,$M_{\odot}$ and $\simeq$\,139$^{+30}_{-14}$\,$M_{\odot}$ respectively, where the error bars give the mass range that follows from the $\pm 3σ$ uncertainty in the $^{12}\text{C}(α, γ) ^{16} \text{O}$ nuclear reaction rate. We find that high resolution of the tabulated reaction rate and fine temporal resolution are necessary to resolve the peak of the BH mass spectrum. We then study IMBHBs with components lying in the mass gap and show that the O4 run will be able to robustly identify most such systems. Finally, we re-analyse GW190521 with a state-of-the-art aligned-spin waveform model, finding that the primary mass lies in the mass gap with 90\% credibility.
description: 29 pages, 18 figures
One-loop corrections to a scalar field during inflation
Creators: name: Seery, David
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The leading quantum correction to the power spectrum of a gravitationally-coupled light scalar field is calculated, assuming that it is generated during a phase of single-field, slow-roll inflation.
description: 33 pages, uses feynmp.sty and ioplatex journal style. v2: matches version published in JCAP. v3: corrects sign error in Eq. (58). Corrects final coefficient of the logarithm in Eq. (105). Small corrections to discussion of divergences in 1-point function. Minor improvements to discussion of UV behaviour in Sec. 4.2
Täterkonzeptionen im attischen und römischen Gerichtswesen: Vorstellungen zu delinquentem Handeln und dessen Trägern in forensischrhetorischer Theorie und Praxis
Creators: name: Piepenbrink, Karen
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Göttinger Forum für Altertumswissenschaft, Bd. 18 (2015): Göttinger Forum für Altertumswissenschaft
Deliverable D‐JIP2-4.2.2 FoodChain‐Lab with integrated network analysis module as a web‐service, browser‐ready, open source and implemented in the BfR cloud (COHESIVE)
Creators: name: Lewicki, Birgit
name: Gottschald, Marion
name: Rügen, Marco
name: Falenski, Alexander
name: Käsbohrer, Annemarie
name: Weiser, Armin
Publisher: name: Zenodo
Year: 2021
Subjects: COHESIVE
FoodChain-Lab
tracing tool
foodborne disease outbreak

description: This is the Deliverable D-JIP2-4.2.2 of the EJP COHESIVE project. The deliverable deals with unifying the efforts of different WPs/tasks within COHESIVE as well as of different national and international projects and across multiple disciplines to develop the FoodChain-Lab web application as integrative tracing software platform.
Charge Gap in the One-Dimensional Extended Hubbard Model at Quarter Filling
Creators: name: Sano, K.
name: Ono, Y.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We propose a new combined approach of the exact diagonalization, the renormalization group and the Bethe ansatz for precise estimates of the charge gap $Δ$ in the one-dimensional extended Hubbard model with the onsite and the nearest-neighbor interactions $U$ and $V$ at quarter filling. This approach enables us to obtain the absolute value of $Δ$ including the prefactor without ambiguity even in the critical regime of the metal-insulator transition (MIT) where $Δ$ is exponentially small, beyond usual renormalization group methods and/or finite size scaling approaches. The detailed results of $Δ$ down to of order of $10^{-10}$ near the MIT are shown as contour lines on the $U$-$V$ plane.
description: 4 pages, 4 figures
Zoning in Vancouver : an expert system to assess development proposals
Creators: name: Atkins, Julian Francis
Publisher: name: University of British Columbia
Year: 2010

description: A sample of Vancouver's zoning has been expressed as an expert system, microcomputer program, - Euclid - in order to demonstrate the feasibility of applying this tool in municipal planning, and to explore the desirability of such computer applications. Review of the literature on Expert Systems from a planning practice perspective showed that this is considered one of the more exciting and potentially useful developments emerging from Computer Science. Expert Systems are thought to be applicable to some planning tasks which are difficult to handle using the computer tools currently available yet suited to automation, however, there is in the literature very little empirical work on developing systems and testing the potential utility of expert systems in land use planning. Euclid is programmed in Turbo Prolog 2.0, a language accessible without extensive or specialized computer training. The first conclusions of the thesis are that simple but useful expert systems can be built rather quickly by planners, and that development control is a good application domain. The thesis also uncovered several weaknesses and inconsistencies which appear related to the way Zoning By-laws have been written, and suggests that the discipline of programming in logic may avoid or resolve such problems. Finally the process of developing a system is shown to be just important as the system itself: Expert systems are a way of thinking about a problem just as they are a way of solving it.
Experimental observation of transverse spin of plasmon polaritons in a single-crystalline silver nanowire
Creators: name: Taneja, Chetna
name: Paul, Diptabrata
name: Kumar, G V Pavan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: We report the experimental observation of the transverse spin and associated spin-momentum locking of surface plasmon polaritons (SPPs) excited in a plasmonic single crystalline silver nanowire (AgNW). In contrast to the SPPs excited in metal films, the electromagnetic field components of the evanescent SPP mode propagating along the long axis ($x$ axis) of the NW can decay along two longitudinal planes ($x$-$y$ and $x$-$z$ planes), resulting in two orthogonal transverse spin components ($s_z$ and $s_y$). Analysis of the opposite circular polarization components of the decaying SPP mode signal in the longitudinal plane ($x$-$y$) reveals spin dependent biasing of the signal and hence the existence of transverse spin component ($s_z$). The corresponding transverse spin density ($s_3$) in the Fourier plane reveals spin-momentum locking, where the helicity of the spin is dictated by the wave-vector components of the SPP evanescent wave. Further, the results are corroborated with three-dimensional numerical calculations. The presented results showcase how a chemically prepared plasmonic AgNW can be harnessed to study optical spins in evanescent waves, and can be extrapolated to explore sub-wavelength effects including directional spin coupling and optical nano-manipulation.
description: 25 pages, 8 figures
Algorithmic Information Theory: a brief non-technical guide to the field
Creators: name: Hutter, Marcus
Publisher: name: arXiv
Year: 2007
Subjects: subject: Information Theory (cs.IT)
subject: Computational Complexity (cs.CC)
subject: FOS: Computer and information sciences

description: This article is a brief guide to the field of algorithmic information theory (AIT), its underlying philosophy, and the most important concepts. AIT arises by mixing information theory and computation theory to obtain an objective and absolute notion of information in an individual object, and in so doing gives rise to an objective and robust notion of randomness of individual objects. This is in contrast to classical information theory that is based on random variables and communication, and has no bearing on information and randomness of individual objects. After a brief overview, the major subfields, applications, history, and a map of the field are presented.
description: 11 LaTeX pages. http://www.scholarpedia.org/article/Algorithmic_information_theory
Transverse Spin Studies with STAR at RHIC
Creators: name: Gagliardi, C. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: STAR has observed sizable transverse single-spin asymmetries for inclusive pi^0 production at forward rapidity in p+p collisions at sqrt{s}=200 GeV. These asymmetries may arise from either the Sivers or Collins effect. Studies are underway during the current RHIC run to elucidate the dynamics that underlie these single-spin asymmetries. Additional measurements are underway to search for the Sivers effect in mid-rapidity di-jet production.
description: 4 pages, 3 figures, to appear in DIS2006 proceedings
A parameter refinement method for Ptychography based on Deep Learning concepts
Creators: name: Guzzi, Francesco
name: Kourousias, George
name: Billè, Fulvio
name: Pugliese, Roberto
name: Gianoncelli, Alessandra
name: Carrato, Sergio
Publisher: name: arXiv
Year: 2021
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Numerical Analysis (math.NA)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: 68U10, 94A08, 92C55

description: X-ray Ptychography is an advanced computational microscopy technique which is delivering exceptionally detailed quantitative imaging of biological and nanotechnology specimens. However coarse parametrisation in propagation distance, position errors and partial coherence frequently menaces the experiment viability. In this work we formally introduced these actors, solving the whole reconstruction as an optimisation problem. A modern Deep Learning framework is used to correct autonomously the setup incoherences, thus improving the quality of a ptychography reconstruction. Automatic procedures are indeed crucial to reduce the time for a reliable analysis, which has a significant impact on all the fields that use this kind of microscopy. We implemented our algorithm in our software framework, SciComPty, releasing it as open-source. We tested our system on both synthetic datasets and also on real data acquired at the TwinMic beamline of the Elettra synchrotron facility.
Graviton Chirality and Topological Order in the Half-filled Landau Level
Creators: name: Haldane, F. D. M.
name: Rezayi, E. H.
name: Yang, Kun
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The fractional quantum Hall state at Landau level (LL) filling factor 5/2 is extremely interesting because it is likely the first non-Abelian state, but its precise nature remains unclear after decades of study. We demonstrate this can be resolved by studying the chirality of its graviton excitations, using circularly polarized Raman scattering. We discuss the advantage of this bulk probe over the existing edge probes.
description: 6 pages, 6 figures
The Orbifolds of Permutation-Type as Physical String Systems at Multiples of c=26. I.Extended Actions and New Twisted World-Sheet Gravities
Creators: name: Halpern, M. B.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: This is the first in a series of papers in which I investigate the orbifolds of permutation-type as candidates for {\it new physical string systems} at multiples of critical closed-string central charges. Examples include the bosonic orientation orbifolds, the bosonic permutation orbifolds and others, as well as superstring extensions. In this paper I use the extended (twisted) Virasoro algebras of these orbifolds to construct the corresponding extended action formulations of the twisted open- and closed-string sectors of all the bosonic orbifolds at $\hatc=26K$. The extended actions exhibit a large set of {\it new twisted world-sheet gravities}, whose extended diffeomorphism groups clearly indicate that the associated operator-string theories can be free of negative- norm states at higher central charge.
description: 54 pages
Forschungen über die rechtlichen Grundlagen der römischen Außenbeziehungen während der Republik bis zum Beginn des Prinzipats
Creators: name: Zack, Andreas
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Göttinger Forum für Altertumswissenschaft, Bd. 18 (2015): Göttinger Forum für Altertumswissenschaft
Using atomic clocks to detect local dark matter halos
Creators: name: Kouvaris, Chris
name: Papantonopoulos, Eleftherios
name: Street, Lauren
name: Wijewardhana, L. C. R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It is possible that bosonic dark matter forms halos around the Sun or the Earth. We discuss the possibility of probing such halos with atomic clocks. Focusing on either a Higgs portal or photon portal interaction between the dark matter and the Standard Model, we search the possible parameter space for which a clock on Earth and a clock in space would have a discernible frequency difference. Bosonic dark matter halos surrounding the Earth can potentially be probed with current optical atomic clocks.
description: 19 pages, 3 figures
Did the terms ‚wanax‘ and ‚lāwāgetās‘ already exist before the emergence of the Mycenaean palatial polities?
Creators: name: Ruppenstein, Florian
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Göttinger Forum für Altertumswissenschaft, Bd. 18 (2015): Göttinger Forum für Altertumswissenschaft
Urinary Symptoms are Unrelated to Dipstick Findings in Indwelling Catheter Users: Supplemental Material
Creators: name: Rounds, Amanda
name: Tractenberg, Rochelle
name: Groah, Suzanne
name: Frost, Jamie
name: Ljungberg, Inger
name: Navia, Herminio
name: Pham, Cynthia
Publisher: name: figshare
Year: 2020
Subjects: subject: Diseases
subject: 110904 Neurology and Neuromuscular Diseases
subject: FOS: Clinical medicine
subject: 110312 Nephrology and Urology

description: Urinary Symptoms are Unrelated to Dipstick Findings in Indwelling Catheter Users: Supplemental Material. This supplemental material includes:
1A and 1B: No matter how a positive leukocyte esterase is defined, there is no evidence that symptoms of bladder function or urine quality co-occur with positive leukocyte esterase or positive nitrite on a dipstick.
Table 1: Ratios to assess association between "negative dipstick" and asymptomatic profile. Regardless of varying definitions of a negative dipstick, symptoms and symptom profiles were not associated with a negative dipstick.
D3.4 Report on participation of BIOS researchers at conferences and events
Creators: name: Santos-Martinez, Maria Jose
name: Knežević, Nikola
Publisher: name: Zenodo
Year: 2024

description:  

This deliverable outlines the participation and presentations of NANOFACTS researchers at conferences and events from March 2022 to June 2024, as part of the Plan for the Exploitation and Dissemination of Results (PEDR). These activities were aimed at staying current with advancements in cancer theranostics and cancer-related biosensors while fostering potential collaborations.
On cumulative residual (past) inaccuracy for truncated random variables
Creators: name: Kundu, Chanchal
name: Di Crescenzo, Antonio
name: Longobardi, Maria
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Theory (cs.IT)
subject: Probability (math.PR)
subject: Statistics Theory (math.ST)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: 94A17, 62N05, 60E15

description: To overcome the drawbacks of Shannon's entropy, the concept of cumulative residual and past entropy has been proposed in the information theoretic literature. Furthermore, the Shannon entropy has been generalized in a number of different ways by many researchers. One important extension is Kerridge inaccuracy measure. In the present communication we study the cumulative residual and past inaccuracy measures, which are extensions of the corresponding cumulative entropies. Several properties, including monotonicity and bounds, are obtained for left, right and doubly truncated random variables.
description: 19 pages, 3 figures
Nuclear Masses, Chaos, and the Residual Interaction
Creators: name: Molinari, A.
name: Weidenmuller, H. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We interpret the discrepancy between semiempirical nuclear mass formulas and actual nuclear masses in terms of the residual interaction. We show that correlations exist among all binding energies and all separation energies throughout the valley of stability. We relate our approach to chaotic motion in nuclei.
description: 9 pages
„… ich gehöre hin nach Trier“: Sieben Briefe (1902-1905) von Hans Graeven über und aus Trier an Wilamowitz
Creators: name: Dräger, Paul
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Göttinger Forum für Altertumswissenschaft, Bd. 18 (2015): Göttinger Forum für Altertumswissenschaft
One-loop corrections to the curvature perturbation from inflation
Creators: name: Seery, David
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: An estimate of the one-loop correction to the power spectrum of the primordial curvature perturbation is given, assuming it is generated during a phase of single-field, slow-roll inflation. The loop correction splits into two parts, which can be calculated separately: a purely quantum-mechanical contribution which is generated from the interference among quantized field modes around the time when they cross the horizon, and a classical contribution which comes from integrating the effect of field modes which have already passed far beyond the horizon. The loop correction contains logarithms which may invalidate the use of naive perturbation theory for cosmic microwave background (CMB) predictions when the scale associated with the CMB is exponentially different from the scale at which the fundamental theory which governs inflation is formulated.
description: 28 pages, uses feynmp.sty and ioplatex journal style. v2: supersedes version published in JCAP. Some corrections and refinements to the discussion and conclusions. v3: Corrects misidentification of quantum correction with an IR effect. Improvements to the discussion
Introductory models of COVID-19 in the United States
Creators: name: Nelson, Peter Hugo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Physics Education (physics.ed-ph)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Students develop and test simple models of the spread of COVID-19. Microsoft Excel is used as the modeling platform because it's non-threatening to students and because it's widely available. Students develop finite difference models and implement them in the cells of preformatted spreadsheets following a guided-inquiry pedagogy that introduces new model parameters in a scaffolded step-by-step manner. That approach allows students to investigate the implications of new model parameters in a systematic way. Students fit the resulting models to reported cases-per-day data for the United States using least-squares techniques with Excel's Solver. Using their own spreadsheets, students discover for themselves that the initial exponential growth of COVID-19 can be explained by a simplified unlimited growth model and by the SIR model. They also discover that the effects of social distancing can be modeled using a Gaussian transition function for the infection rate coefficient and that the summer surge was caused by prematurely relaxing social distancing and then reimposing stricter social distancing. Students then model the effect of vaccinations and validate the resulting SIRV model by showing that it successfully predicts the reported cases-per-day data from Thanksgiving through February 14, 2021. The same SIRV model is then extended and successfully fits the fourth peak up to June 1, 2021, caused by further relaxation of social distancing measures. Finally, students extend the model up to the present day and successfully account for the appearance of the delta variant of SARS-CoV-2. The fitted model also predicts that the delta-variant peak will be comparatively short, and the cases-per-day data should begin to fall off in early September 2021 - counter to current expectations. This case study would make an excellent capstone experience for students interested in scientific modeling.
description: 37 pages, 13 figures
Induced decoherence and entanglement by interacting quantum spin baths
Creators: name: Lai, Cheng-Yan
name: Hung, Jo-Tzu
name: Mou, Chung-Yu
name: Chen, Pochung
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The reduced dynamics of a single or two qubits coupled to an interacting quantum spin bath modeled by a XXZ spin chain is investigated. By using the method of time-dependent density matrix renormalization group (t-DMRG), we go beyond the uniform coupling central spin model and evaluate nonperturbatively the induced decoherence and entanglement. It is shown that both decoherence and entanglement strongly depend on the phase of the underlying spin bath. We show that in general, spin baths can induce entanglement for an initially disentangled pair of qubits. Furthermore, when the spin bath is in the ferromagnetic phase, because qubits directly couple to the order parameter, the reduced dynamics shows oscillatory type behavior. On the other hand, only for paramagnetic and antiferromagnetic phases, initially entangled states suffer from the entanglement sudden death. By calculating concurrence, the finite disentanglement time is mapped out for all phases in the phase diagram of the spin bath.
BPS Domain Walls and Vacuum Structure of N=1 Supergravity Coupled to a Chiral Multiplet
Creators: name: Gunara, Bobby E.
name: Zen, Freddy P.
name: Arianto
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Dynamical Systems (math.DS)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We study BPS domain walls of N=1 supergravity coupled to a chiral multiplet and their Lorentz invariant vacua which can be viewed as critical points of BPS equations and the scalar potential. Supersymmetry further implies that gradient flows of BPS equations controlled by a holomorphic superpotential and the Kaehler geometry are unstable near local maximum of the scalar potential, whereas they are stable around local minimum and saddles of the scalar potential. However, the analysis using RG flows shows that such gradient flows do not always exist particularly in infrared region.
description: 17 pages, a typo corrected in section 2
D5.1 Delivered trainings on research management and administration skills in the first year
Creators: name: Gadjanski, Ivana
name: Djisalov, Mila
name: Knežević, Nikola
Publisher: name: Zenodo
Year: 2024

description: This deliverable focuses on the trainings organized from the project's inception until December 31, 2021. These sessions covered topics such as project proposal writing, project planning and management, best practices for research publication within the Horizon Europe funding scheme, and public procurement processes in Serbia, all tailored to the needs of researchers from the Biosense Institute.
Suppression of heating by long-range interactions in periodically driven spin chains
Creators: name: Bhakuni, Devendra Singh
name: Santos, Lea F.
name: Lev, Yevgeny Bar
Publisher: name: arXiv
Year: 2021
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We propose a mechanism to suppress heating in periodically driven many-body quantum systems by employing sufficiently long-range interactions and experimentally relevant initial conditions. The mechanism is robust to local perturbations and does \emph{not} rely on disorder or high driving frequencies. Instead, it makes use of an approximate fragmentation of the many-body spectrum of the non-driven system into bands, with band gaps that grow with the system size. We show that when these systems are driven, there is a regime where \emph{decreasing} the driving frequency \emph{decreases} heating and entanglement build-up. This is demonstrated numerically for a prototypical system of spins in one dimension, but the results can be readily generalized to higher dimensions.
description: 5 pages, 4 figures
A Convex Approximation for the Tertiary Control of Unbalanced Microgrids
Creators: name: Ramirez, Diego-Alejandro
name: Garces, Alejandro
name: Florez, Juan Jose Mora
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: This article presents an optimization model for tertiary control in three-phase unbalanced microgrids. This model considers 24h operation and includes renewable energy sources, energy storage devices, and grid code limitations. Power flow equations are simplified using a recently developed approximation based on Wirtinger's calculus. The proposed model is evaluated both theoretically and practically. From the theoretical point of view, the model is suitable for tertiary control since it is convex; hence, global optimum, uniqueness of the solution, and convergence of the interior point method are guaranteed. From the practical point of view, the model is simple enough to be implemented in a small single-board computer with low time calculation. The latter is evaluated by implementing the model in a Raspberry-Pi board with the CIGRE low voltage benchmark; the model is also evaluated in the IEEE 123-nodes test system for power distribution networks.
description: Paper submitted to Electric Power Systems Research
Hero, non-hero, and anti-hero : a critical study of the development of Chen Jiangong's fiction
Creators: name: Hu, Lingyi
Publisher: name: University of British Columbia
Year: 2010

description: This M.A. thesis is a critical study of Chen Jiangong's fiction, chiefly attempting to reveal the process of thematic development in this author's works by way of tracing the hero through non-hero to anti-hero. The first chapter, which is biographical, makes a brief account of Chen's family background, personal experience as well as the unique personality fostered by his ten year career as a coal-miner. The second chapter presents an analysis of the thematic defects of his early fiction, and meanwhile some technical matters are succinctly introduced. The third chapter deals with the stylistic traits -- subject matter, narrative technique and language -- of the three stories which left untouched in the previous chapter due to their different way of representation. In order to show clearly Chen's two styles, a comparison of these three stories with his other early works is frequently made. The fourth chapter is an interpretation of his two mature works "No. 9 Winch Handle Alley" and "Looking for Fun." The centre of attention is mainly concentrated on "the sense of tragicomedy" -- a philosophy of life rather than a mere technique Chen acquired after he disposed of former literary dogmas. The fifth chapter is devoted to a comparative study of his masterpiece "Curlylocks" and how it was influenced by J.D. Salinger's "The Catcher in the Rye". The aspect of anti-heroism is especially stressed. The sixth chapter is a summary in which Chen's thematic transformation from heroism to anti-heroism is reiterated and his literary achievements are evaluated.
Charged black-bounce spacetimes
Creators: name: Franzin, Edgardo
name: Liberati, Stefano
name: Mazza, Jacopo
name: Simpson, Alex
name: Visser, Matt
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Given the recent development of rotating black-bounce-Kerr spacetimes, for both theoretical and observational purposes it becomes interesting to see whether it might be possible to construct black-bounce variants of the entire Kerr-Newman family. Specifically, herein we shall consider black-bounce-Reissner-Nordström and black-bounce-Kerr-Newman spacetimes as particularly simple and clean everywhere-regular black hole "mimickers" that deviate from the Kerr-Newman family in a precisely controlled and minimal manner, and smoothly interpolate between regular black holes and traversable wormholes. While observationally the electric charges on astrophysical black holes are likely to be extremely low, $|Q|/m \ll 1$, introducing any non-zero electric charge has a significant theoretical impact. In particular, we verify the existence of a Killing tensor (and associated Carter-like constant) but without the full Killing tower of principal tensor and Killing-Yano tensor, also we discuss how, assuming general relativity, the black-bounce-Kerr-Newman solution requires an interesting, non-trivial matter/energy content.
description: V1: 27 pages, 0 figures, 61 references. V2: Still 27 pages, 0 figures, no physics changes, 6 references added (now 67 references). V3: Published and final version, now 29 pages, 2 figures added, minor discussion added on page 17, 2 references added (now 69 references)
Feedback from supercritical disk accretion flows; Two-dimensional radiation-hydrodynamic simulations of stable and unstable disks with radiatively driven outflows
Creators: name: Ohsuga, K.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The supercritical disk accretion flow with radiatively driven outflows is studied based on two-dimensional radiation-hydrodynamic simulations for a wide range of the mass input rate, $\dot{M}_{\rm input}$, which is the mass supplied from the outer region to the disk per unit time. The $α$-prescription is adopted for the viscosity. We employ $α=0.5$, as well as $α=0.1$ for $\dot{M}_{\rm input}\ge 3\times 10^2L_{\rm E}/c^2$ and only $α=0.5$ for $\dot{M}_{\rm input}\le 10^2L_{\rm E}/c^2$, where $L_{\rm E}$ is the Eddington luminosity and $c$ is the speed of light. The quasi-steady disk and radiately driven outflows form in the case in which the mass input rate highly exceeds the critical rate, $\dot{M}_{\rm input}>3\times 10^2 L_{\rm E}/c^2$. Then, the disk luminosity as well as the kinetic energy output rate by the outflow exceeds the Eddington luminosity. The moderately supercritical disk, $\dot{M}_{\rm input}\sim 10-10^2 L_{\rm E}/c^2$, exhibits limit-cycle oscillations. The disk luminosity goes up and down across the Eddington luminosity, and the radiatively driven outflows intermittently appear. The time averaged mass, momentum, and kinetic energy output rates by the outflow as well as the disk luminosity increase with increase of the mass input rate, $\propto \dot{M}_{\rm input}^{0.7-1.0}$ for $α=0.5$ and $\propto \dot{M}_{\rm input}^{0.4-0.6}$ for $α=0.1$. Our numerical simulations show that the radiatively driven outflow model for the correlation between black hole mass and bulge velocity dispersion proposed by \citeauthor{SR98} and \citeauthor{King03} is successful if $\dot{M}_{\rm input}c^2/L_{\rm E} \sim$ a few 10 ($α=0.5$) or $\gsim$ a few ($α=0.1$).
description: 7 pages, 5 figures, accepted for publication in ApJ
Slow growth of magnetic domains helps fast evolution routes for out-of-equilibrium dynamics
Creators: name: Pemartín, Isidoro González-Adalid
name: Mompó, Emanuel
name: Lasanta, Antonio
name: Martín-Mayor, Víctor
name: Salas, Jesús
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Cooling and heating faster a system is a crucial problem in science, technology and industry. Indeed, choosing the best thermal protocol to reach a desired temperature or energy is not a trivial task. Noticeably, we find that the phase transitions may speed up thermalization in systems where there are no conserved quantities. In particular, we show that the slow growth of magnetic domains shortens the overall time that the system takes to reach a final desired state. To prove that statement, we use intensive numerical simulations of a prototypical many-body system, namely the 2D Ising model.
description: The document contains the paper (pdflatex, 11 pages), and 12 pdf figures. Final version to be published
Extrapolations of Lattice Meson Form Factors
Creators: name: Bunton, T. B.
name: Jiang, F. -J.
name: Tiburzi, B. C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We use chiral perturbation theory to study the extrapolations necessary to make physical predictions from lattice QCD data for the electromagnetic form factors of pseudoscalar mesons. We focus on the quark mass, momentum, lattice spacing, and volume dependence and apply our results to simulations employing mixed actions of Ginsparg-Wilson valence quarks and staggered sea quarks. To determine charge radii at quark masses on the lattices currently used, we find that all extrapolations except the one to infinite volume make significant contributions to the systematic error.
description: 14pp, discussion and Ref. added for disconnected diagrams
Semiclassical Dynamics of Dirac particles interacting with a Static Gravitational Field
Creators: name: Gosselin, Pierre
name: Bérard, Alain
name: Mohrbach, Herve
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The semiclassical limit for Dirac particles interacting with a static gravitational field is investigated. A Foldy-Wouthuysen transformation which diagonalizes at the semiclassical order the Dirac equation for an arbitrary static spacetime metric is realized. In this representation the Hamiltonian provides for a coupling between spin and gravity through the torsion of the gravitational field. In the specific case of a symmetric gravitational field we retrieve the Hamiltonian previously found by other authors. But our formalism provides for another effect, namely, the spin hall effect, which was not predicted before in this context.
High-precision source characterization of intermediate mass-ratio black hole coalescences with gravitational waves: The importance of higher-order multipoles
Creators: name: Islam, Tousif
name: Field, Scott E.
name: Haster, Carl-Johan
name: Smith, Rory
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Intermediate mass ratio inspiral (IMRI) binaries -- containing stellar-mass black holes coalescing into intermediate-mass black holes ($M>100M_{\odot}$) -- are a highly anticipated source of gravitational waves (GWs) for Advanced LIGO/Virgo. Their detection and source characterization would provide a unique probe of strong-field gravity and stellar evolution. Due to the asymmetric component masses and the large primary, these systems generically excite subdominant modes while reducing the importance of the dominant quadrupole mode. Including higher order harmonics can also result in a $10\%-25\%$ increase in signal-to-noise ratio for IMRIs, which may help to detect these systems. We show that by including subdominant GW modes into the analysis we can achieve a precise characterization of IMRI source properties. For example, we find that the source properties for IMRIs can be measured to within $2\%-15\%$ accuracy at a fiducial signal-to-noise ratio of 25 if subdominant modes are included. When subdominant modes are neglected, the accuracy degrades to $9\%-44\%$ and significant biases are seen in chirp mass, mass ratio, primary spin and luminosity distances. We further demonstrate that including subdominant modes in the waveform model can enable an informative measurement of both individual spin components and improve the source localization by a factor of $\sim$10. We discuss some important astrophysical implications of high-precision source characterization enabled by subdominant modes such as constraining the mass gap and probing formation channels.
description: 11 Pages, 10 Figures; Matches published version in PRD
Impfquoten von Kinderschutzimpfungen in Deutschland – aktuelle Ergebnisse aus der RKI-Impfsurveillance
Creators: name: Rieck, Thorsten
name: Feig, Marcel
name: Siedler, Anette
Publisher: name: Robert Koch-Institut
Year: 2021
Subjects: subject: Impfsurveillance
subject: Kinderschutzimpfungen
subject: Schuleingangsuntersuchungen
subject: STIKO
subject: Impfquoten
subject: 610 Medizin und Gesundheit

description: Das RKI analysiert und publiziert auf jährlicher Basis Impfquoten bei Kindern und Jugendlichen in Deutschland unter Berücksichtigung von Daten aus den Schuleingangsuntersuchungen und Abrechnungsdaten der Kassenärztlichen Vereinigungen. Die aktuellen Analysen weisen auf die bereits in den Vorjahren aufgezeigten Defizite hin, die bei fast allen Impfungen bestehen: Kinder in Deutschland werden oftmals zu spät und zu wenig geimpft und dadurch unnötig lange einer Infektionsgefahr ausgesetzt.
Influence of dimensionality on superconductivity in carbon nanotubes
Creators: name: Bellucci, S.
name: Cini, M.
name: Onorato, P.
name: Perfetto, E.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate the electronic instabilities in carbon nanotubes (CNs), looking for the break-down of the one dimensional Luttinger liquid regime due to the strong screening of the long-range part of the Coulomb repulsion. We show that such a breakdown is realized both in ultra-small single wall CNs and multi wall CNs, while a purely electronic mechanism could explain the superconductivity (SC) observed recently in ultra-small (diameter $ \sim 0.4 nm$) single wall CNs ($T_c\sim 15 ^{o}K$) and entirely end-bonded multi-walled ones ($T_c\sim 12 ^{o}K$). We show that both the doping and the screening of long-range part of the electron-electron repulsion, needed to allow the SC phase, are related to the intrinsically 3D nature of the environment where the CNs operate.
description: 5 pages, 3 figures, PACS: 71.10.Pm,74.50.+r,71.20.Tx, to appear in J. Phys. Cond. Mat
Prospects of light charged scalars in a three Higgs doublet model with $Z_3$ symmetry
Creators: name: Chakraborti, Manimala
name: Das, Dipankar
name: Levy, Miguel
name: Mukherjee, Samadrita
name: Saha, Ipsita
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The stringent constraints from the direct searches for exotic scalars at the LHC as well as indirect bounds from flavor physics measurements have imposed severe restrictions on the parameter space of new physics models featuring extended Higgs sectors. In the Type-II 2HDM, this implies a lower bound on the charged Higgs masses of $\cal O$(600 GeV). In this work we analyze the phenomenology of a Z3HDM in the alignment limit focusing on the impact of flavor physics constraints on its parameter space. We show that the couplings of the two charged Higgs bosons in this model feature an additional suppression factor compared to Type-II 2HDM. This gives rise to a significant relaxation of the flavor physics constraints in this model, allowing the charged Higgs masses to be as low as $\cal O$(200 GeV). We also consider the constraints coming from precision electroweak observables and the observed diphoton decay rate of the 125 GeV Higgs boson at the LHC. The bounds coming from the direct searches of nonstandard Higgs bosons at the LHC, particularly those from resonance searches in the ditau channel, prove to be very effective in constraining this scenario further.
description: 22 pages, 7 figures, Discussions on unitarity, stability and perturbativity of the scalar potential included, matches accepted PRD version
Normal zone propagation along superconducting films deposited on wide substrates
Creators: name: Sokolovsky, V.
name: Meerovich, V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The propagation of a normal zone in a long superconducting film on a dielectric or conducting substrate is analyzed analytically. The obtained expressions for the propagation velocity allow one to analyze the effect of the thermal resistance between the film and substrate and the width of the substrate. The results are expended into the cases of the normal zone propagation in a meander and in parallel films and can be approximately applied to multifilamentary coated superconductors.
description: 23 pages, 10 figures, submitted to Cryogenics