cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Collective excitations of low density fermion-boson quantum-liquid mixtures
Creators: name: Santamore, D. H.
name: Timmermans, Eddy
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We investigate the collective excitations of a low temperature dilute gas mixture that consists of a Bose-Einstein condensate and a Fermi-gas that is a normal (i.e. non-superfluid) Fermi-liquid. We find that the BEC-mediated fermion-fermion interactions, as a consequence of retardation, can become repulsive and support a zero-sound mode that is essentially undamped. In addition, we find a damped zero-sound mode that can be described as a BEC-sound mode modified by fermion mediated boson-boson interactions, and we derive its decay-rate caused by Landau damping. We study the mode structure of these excitations and find avoided crossing behavior as well as a termination point. The collective mode dynamics also reveals that phase separation sets in when the fermion-mediated boson-boson interaction destroys the stability of the homogeneous BEC. We estimate the time and length scales of the onset of the phase separation, and we discuss the feasibility of experimentally probing these consequences of mediated interactions.
description: 13 pages, 6 figures
Efficient implementation of the single-reference algebraic diagrammatic construction theory for charged excitations: Applications to the TEMPO radical and DNA base pairs
Creators: name: Banerjee, Samragni
name: Sokolov, Alexander Yu.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We present an efficient implementation of the second- and third-order single-reference algebraic diagrammatic construction theory for electron attachment (EA) and ionization (IP) energies and spectra (EA/IP-ADC(n), n = 2, 3). Our new EA/IP-ADC program features spin adaptation for closed-shell systems, density fitting for efficient handling of the two-electron integral tensors, as well as vectorized and parallel implementation of tensor contractions. We demonstrate capabilities of our efficient implementation by applying the EA/IP-ADC(n) (n = 2, 3) methods to compute the photoelectron spectrum of the TEMPO radical, as well as the vertical and adiabatic electron affinities of TEMPO and two DNA base pairs (guanine-cytosine and adenine-thymine). The spectra and electron affinities computed using large diffuse basis sets with up to 1028 molecular orbitals are found to be in a good agreement with the best available results from the experiment and theoretical simulations.
Hinweise für Publikationen der Römisch-Germanischen Kommission
Creators: name: Die Redaktion
Publisher: name: Bericht der Römisch-Germanischen Kommission
Year: 2023

description: Bericht der Römisch-Germanischen Kommission, Bd. 101/102 2020/2021(2023): Bericht der Römisch-Germanischen Kommission
Cosmological Constraints for the Cold Dark Matter and Model Building based on the Flavor Symmetric Radiative Seesaw Model
Creators: name: Okada, Hiroshi
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: It is now clear that the masses of the neutrino sector are much lighter than those of the other three sectors.There are many attempts to explain the neutrino masses radiatively by means of inert Higgses, which don't have vacuum expectation values. Then one can discuss cold dark matter candidates, because of no needing so heavy particles and having a $Z_2$ parity symmetry corresponding to the R-parity symmetry of the MSSM. The most famous work would be the Zee model. Recently a new type model along this line of thought was proposed by Mr. E. Ma. We paid attention to this idea. We introduce a flavor symmetry based on a dihedral group $D_6$ to constrain the Yukawa sector. For the neutrino sector, we find that the maximal mixing of atmospheric neutrinos is realized, it can also be shown that only an inverted mass spectrum, the value of $|V_{MNS_{13}}|$ is 0.0034 and so on. When one extends the Higgs sector, it leads to FCNCs mediated by Higgs fields generally. But in our model, the FCNCs are (of course) suppressed for the experiments sufficiently. For the fermionic CDM candidates, we find that the mass of the CDM and the inert Higgs should be larger than about 230 and 300 GeV, respectively. If we restrict ourselves to a perturbative regime, they should be lighter than about 750 GeV.
description: 4 pages, 1 figure. Talk given at ICGA8-For The 100th Anniversary of Hideki Yukawa and Promotion of Women Scientists-, Nara Women's University, Japan (August 29-September 1, 2007)
Towards the hidden symmetry in Coulomb interacting twisted bilayer graphene: renormalization group approach
Creators: name: Vafek, Oskar
name: Kang, Jian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We develop a two stage renormalization group which connects the continuum Hamiltonian for twisted bilayer graphene at length scales shorter than the moire superlattice period to the Hamiltonian for the active narrow bands only which is valid at distances much longer than the moire period. In the first stage, the Coulomb interaction renormalizes the Fermi velocity and the interlayer tunnelings in such a way as to suppress the ratio of the same sublattice to opposite sublatice tunneling, hence approaching the so-called chiral limit. In the second stage, the interlayer tunneling is treated non-perturbatively. Via a progressive numerical elimination of remote bands the relative strength of the one-particle-like dispersion and the interactions within the active narrow band Hamiltonian is determined, thus quantifying the residual correlations and justifying the strong coupling approach in the final step. We also calculate exactly the exciton energy spectrum from the Coulomb interactions projected onto the renormalized narrow bands. The resulting softening of the collective modes marks the propinquity of the enlarged ("hidden") $U(4)\times U(4)$ symmetry in the magic angle twisted bilayer graphene.
description: 11 pages; (4p main text + 2.5p references + 4p supplementary) 3+3 figures; added a new calculation of the RG flow of the particle-hole asymmetry term and an outline of the numerical recipe for stage 2 RG
On the Diophantine equation $x^2+q^{2m}=2y^p$
Creators: name: Tengely, Szabolcs
Publisher: name: arXiv
Year: 2006
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11D61; 11Y50

description: In this paper we consider the Diophantine equation $x^2+q^{2m}=2y^p$ where $m,p,q,x,y$ are integer unknowns with $m>0,$ $p$ and $q$ are odd primes and $\gcd(x,y)=1.$ We prove that there are only finitely many solutions $(m,p,q,x,y)$ for which $y$ is not a sum of two consecutive squares. We also study the above equation with fixed $y$ and with fixed $q.$
Scholarship across barriers – the social history of the Corpus Vasorum Arretinorum
Creators: name: Kenrick, Philip
Publisher: name: Bericht der Römisch-Germanischen Kommission
Year: 2023

description: This paper traces, through the preserved correspondence of Prof Howard Comfort (1904–1993) of Haverford College, Pennsylvania the recovery after the Second World War of the unpublished catalogue of makers’ marks on Italian terra sigillata pottery which had been compiled over many years by August Oxé (1863–1944) of Krefeld, Germany. The manuscript had in 1944 been placed in safe keeping in Marburg; permission was obtained for it to be sent to the USA, where it was translated into English and edited. It was eventually published in Germany in 1968. The correspondence also paints a vivid picture of the difficulties of life in different parts of Germany in the immediate aftermath of the war.
description: Bericht der Römisch-Germanischen Kommission, Bd. 101/102 2020/2021(2023): Bericht der Römisch-Germanischen Kommission
title: The Detection of Simulated Clandestine Graves in an Arid Environment Using Unmanned Aerial Vehicle Remote Sensing
Creators: name: Alawadhi, A
Publisher: name: Liverpool John Moores University
Year: 2025

description: The Middle East has frequently suffered from armed conflicts that resulted in mass burials. However, the detection of graves in such an arid environment by deploying remote sensing payload on unmanned aerial vehicles (UAVs) has received little attention. This study used UAVs equipped with different sensors aimed at narrowing down the search area of possible simulated gravesites. It sought to detect variation in topsoil temperature and soil moisture between the simulated graves and their surroundings, detect surface anomalies both manually and automatically, find grave mounds using the digital elevation model and evaluate the use of normalised difference vegetation index (NDVI) in grave detection. The enclosed research area included both control and experimental graves and was imaged for 18 months. The results demonstrated the effectiveness of thermal imaging in detecting heat produced from buried sheep carcasses and detecting the change in grave soil moisture for 7 and 10 months, respectively. Moreover, the buried animals significantly influenced the topsoil temperature of the mass graves (p = 0.044). Meanwhile, the anomaly detection was possible for up to 18 months. Near-IR and red-edge bands were the most suitable for the manual detection (Near-IR 66.66%, red-edge 33.33%), whilst the best-performing automated method varied depending on the sensor used. Standard RXD (RXD) and Uniform Target Detector (UTD) algorithms were the most suitable methods for the RGB sensor (RXD 56.25%, UTD 43.75%). The best outcomes for the multispectral sensor were obtained using Hybrid of the RXD and UTD algorithms (RXD-UTD) (60%), UTD (26.67%) and RXD (13.33%). Despite the fact that the research took place in a very hot and dry environment, a high (0.33) difference in NDVI values was observed between the graves and their surroundings. The results from these cost-and time- effective search methods presented in this study affirm their potential for detecting burial sites in an arid environment.
Search for the decay B0 to a1 rho
Creators: name: al, B. Aubert et
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present a search for the rare B-meson decay B0 to a1+- rho-+ with a_1+- to pi+ pi- pi+-. We use (110 +/- 1.2) x 10^6 Upsilon(4S) to BBbar decays collected with the BaBar detector at the PEP-II asymmetric-energy B Factory at SLAC. We obtain an upper limit of 30 x 10-6 (90% C.L.) for the branching fraction product B(B0 to a_1+- rho-+)B(a_1+- to pi+ pi- pi+-), where we assume that the a_1+- decays exclusively to rho0 pi+-.
description: Submitted to PRD Rapid Communication
Factorization in exclusive semileptonic radiative B decays
Creators: name: Cirigliano, Vincenzo
name: Pirjol, Dan
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We derive a new factorization relation for the semileptonic radiative decay B -> π\ell νγin the kinematical region of a slow pion p_π~ Λand an energetic photon E_γ>> Λ, working at leading order in Λ/m_b. In the limit of a soft pion, the nonperturbative matrix element appearing in this relation can be computed using chiral perturbation theory. We present a phenomenological study of this decay, which may be important for a precise determination of the exclusive nonradiative decay.
description: 10 pages, 3 figures; minor corrections, one reference added
Investigation of the three-dimensional structures of zeolite molecular sieves by high resolution solid state NMR
Creators: name: Diaz Garcia, Anix C.
Publisher: name: University of British Columbia
Year: 2009

description: This thesis work describes the use of solid state NMR experiments to obtain important structural information about zeolite complexes with organic guest molecules. A highly siliceous zeolite ZSM-5 loaded with p-xylene was chosen for the detailed study. A methodology to investigate the zeolite complexes of highly siliceous ZSM-5 with pxylene molecules by locating the organic molecules inside the framework using only NMR techniques was developed. In this way a complete three-dimensional characterisation of these systems was obtained. The application of the double and triple resonance dephasing experiments of Cross- Polarization (CP), Rotational Echo Double Resonance (REDOR), and Transferred Echo Double Resonance (TEDOR), to attain internuclear distances from the dipolar interaction between the guest molecules nuclei and the silicon nuclei in the zeolite framework was investigated. Specifically deuterated and ¹³C labelled p-xylenes were used in these studies. Triple resonance dephasing experiments of REDOR and TEDOR were performed on the complex of the high loaded form of zeolite ZSM-5 with p-xylene [¹³C,CH₃] to obtain structural information through the dipolar interaction between the labelled ¹³C methyl group of the guest molecules and the silicon atoms. The unambiguous assignment of the ¹³C NMR spectra of the guest p-xylene molecules was done using 2D-TEDOR experiments. The acquisition of reliable quantitative data from these techniques was complicated due to the dynamics of the absorbed molecules within the zeolite framework. The motional characteristic of the molecules was investigated by ²H NMR and chemical-exchange spectroscopy. The application of high resolution ¹³C CP/MAS 2D NMR exchange spectroscopy to investigate the molecular motions of guest molecules inside zeolite catalysts and to obtain critical kinetic information on these processes was demonstrated for the first time. By application of the CP experiment and the protocol developed in this thesis a threedimensional structure of the low-loaded complex of p-xylene in ZSM-5 was obtained. This structure was derived without any previous x-ray diffraction information. The NMR results indicated that the p-xylene molecules were located in the intersection of the sinusoidal and straight channels of the zeolite.
Evaluation of Truck Escape Ramps
Creators: name: Pigman, Jerry G.
name: Agent, Kenneth R.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1985
Subjects: subject: Transportation Engineering

description: Out-of-control vehicles on steep grades have the potential for and frequently do result in severe accidents. There are two truck escape ramps in Kentucky, and both were constructed as a result of severe accidents and the potential for additional accidents.  One escape ramp is on the Hyden Spur (KY 118) in Leslie County. Because of geometric conditions of the highway and topographic constraints, an arrester-type escape ramp was designed with pea gravel as the arrester material. The beginning of the ramp is a 386-foot paved section on an 8-percent downgrade; followed by a gravel bed 520 feet long on a 4-percent downgrade. This ramp was opened for use in 1980, and it has been used four times in emergency situations.  The other escape ramp is on KY 11 leading into Beattyville in Lee County and is a combination gravity and arrester design. The ramp includes a 400-foot paved approach, followed by a 700-foot arrester bed over a 1.5-percent downgrade and then a 210-foot arrester bed over a 14-percent upgrade. There has been only one reported emergency usage of this ramp since it opened in 1980.  Overall, the escape ramps have proven to be operating properly and appear to be performing as they were designed. Of the five cases where the ramps were used by out-of-control vehicles, no one has been injured and there has been very little damage to the vehicles involved.
Sampling Techniques for the Collection of Vehicle Classification Data
Creators: name: Pigman, Jerry G.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1985
Subjects: subject: Transportation Engineering

description: The question of what length of time is necessary to collect statistically reliable vehicle classification data is an important issue when manpower is limited. Varying local conditions may necessitate more classification data be collected at some locations than others. The use of short-term counts could produce significant savings. Supplementing manual counts with automatic classification equipment could reduce data collection costs and improve accuracy.  The objectives of this study were to review literature to determine the capabilities of automatic classification equipment and to analyze toll road data in Kentucky to determine if short time periods may be used to represent the annual distribution of vehicle types.  Automatic classification equipment has been evaluated by others and there are systems available that can classify vehicles according to number of axles and wheelbase. Emphasis is being placed on the development of a more reliable and permanent axle counter by several companies.  Results from the analysis of vehicle classification data at two parkway toll stations indicate that specific 8-hour periods within the year are representative of the annual distribution of vehicle types. It was recommended that data collection efforts be concentrated on weekdays between 7:00 a.m. and 11:00 p.m. during all seasons of the year. Limitations were noted because the analysis included data from only two toll stations.
Evaluation of Stone Column Stabilized Embankment Foundation
Creators: name: Meade, Bobby W.
name: Allen, David L.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1985
Subjects: subject: Transportation Engineering

description: The purpose of this study was to document construction procedures, monitor field performance, and make recommendations concerning the effectiveness and future use of a foundation improvement procedure using stone columns for stabilization. This effort was executed by use of field inspections and photographs, instrumentation to monitor foundation and field responses and laboratory analyses of existing and possible conditions.  Instrumentation included earth pressure meters, a multipoint settlement gage, a horizontal slope inclinometer, a settlement platform and vertical slope inclinometers. Settlement of the foundation after column construction was found to be approximately 8 inches as compared to a predicted total settlement of 16 inches. Initial pressure distribution was affected by the stone columns but long term distribution indicated no relationship to the stone columns. Performance of the stone columns was found to be satisfactory in that an adequate embankment factor of safety was obtained.
Exact-Exchange Spin-Current Density-Functional Theory
Creators: name: Rohra, Stefan
name: Goerling, Andreas
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A spin-current density-functional theory (SCDFT) is introduced, which takes into account currents of the spin-density and thus currents of the magnetization in addition to the electron density, the non-collinear spin-density, and the density current, which are considered in standard current spin-density-functional theory. An exact exchange Kohn-Sham formalism based on SCDFT is presented, which represents a general framework for the treatment of magnetic and spin properties. As illustration an oxygen atom in a magnetic field is treated with the new approach.
description: 4 pages, 3 figures
On the Exponential of Matrices in su(4)
Creators: name: Ramakrishna, Viswanath
name: Zhou, Hong
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 15-xx

description: This note presents explicit formulae for the exponentials of a wide variety of matrices which are 4x4, anti-Hermitian. Easily verifiable conditions characterizing when such matrices admit one of three minimal polynomials are also given. Essential use of the algebra isomorphism between real 4x4 matrices and the tensor product of the quaternions with themseleves is made. Illustrations from important applications are given.
description: 21 pages long
Hydrodynamic interactions of spherical particles in suspensions confined between two planar walls
Creators: name: Bhattacharya, S.
name: Blawzdziewicz, J.
name: Wajnryb, E.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Hydrodynamic interactions in a suspension of spherical particles confined between two parallel planar walls are studied under creeping-flow conditions. The many-particle friction matrix in this system is evaluated using our novel numerical algorithm based on transformations between Cartesian and spherical representations of Stokes flow. The Cartesian representation is used to describe the interaction of the fluid with the walls and the spherical representation is used to describe the interaction with the particles. The transformations between these two representations are given in a closed form, which allows us to evaluate the coefficients in linear equations for the induced-force multipoles on particle surfaces. The friction matrix is obtained from these equations, supplemented with the superposition lubrication corrections. We have used our algorithm to evaluate the friction matrix for a single sphere, a pair of spheres, and for linear chains of spheres. The friction matrix exhibits a crossover from a quasi-two-dimensional behavior (for systems with small wall separation H) to the three-dimensional behavior (when the distance H is much larger than the interparticle distance L). The crossover is especially pronounced for a long chain moving in the direction normal to its orientation and parallel to the walls. In this configuration, a large pressure buildup occurs in front of the chain for small values of the gapwidth H, which results in a large hydrodynamic friction force. A standard wall superposition approximation does not capture this behavior.
Long-lived mesoscopic entanglement outside the Lamb-Dicke regime
Creators: name: McDonnell, M. J.
name: Home, J. P.
name: Lucas, D. M.
name: Imreh, G.
name: Keitch, B. C.
name: Szwer, D. J.
name: Thomas, N. R.
name: Webster, S. C.
name: Stacey, D. N.
name: Steane, A. M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We create entangled states of the spin and motion of a single $^{40}$Ca$^+$ ion in a linear ion trap. The motional part consists of coherent states of large separation and long coherence time. The states are created by driving the motion using counterpropagating laser beams. We theoretically study and experimentally observe the behaviour outside the Lamb-Dicke regime, where the trajectory in phase space is modified and the coherent states become squeezed. We directly observe the modification of the return time of the trajectory, and infer the squeezing. The mesoscopic entanglement is observed up to $Δα= 5.1$ with coherence time 170 microseconds and mean phonon excitation $\nbar = 16$.
description: 5 pages, 3 figures. Revised version after editor comments
Event-Based Signal Temporal Logic Synthesis for Single and Multi-Robot Tasks
Creators: name: Gundana, David
name: Kress-Gazit, Hadas
Publisher: name: arXiv
Year: 2020
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: We propose a new specification language and control synthesis technique for single and multi-robot high-level tasks; these tasks include timing constraints and reaction to environmental events. Specifically, we define Event-based Signal Temporal Logic (STL) and use it to encode tasks that are reactive to uncontrolled environment events. Our control synthesis approach to Event-based STL tasks combines automata and control barrier functions to produce robot behaviors that satisfy the specification when possible. Our method automatically provides feedback to the user if an Event-based STL task can not be achieved. We demonstrate the effectiveness of the framework through simulations and physical demonstrations of multi-robot tasks.
description: 8 pages, 5 figures
Entanglement of zero angular momentum mixtures and black hole entropy
Creators: name: Livine, Etera R.
name: Terno, Daniel R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We calculate the entanglement of formation and the entanglement of distillation for arbitrary mixtures of the zero spin states on an arbitrary-dimensional bipartite Hilbert space. Such states are relevant to quantum black holes and to decoherence-free subspaces based communication. The two measures of entanglement are equal and scale logarithmically with the system size. We discuss its relation to the black hole entropy law. Moreover, these states are locally distinguishable but not locally orthogonal, thus violating a conjecture that the entanglement measures coincide only on locally orthogonal states. We propose a slightly weaker form of this conjecture. Finally, we generalize our entanglement analysis to any unitary group.
description: 5 pages, revtex4 Final version. A discussion of local orthogonality and entanglement is added
Straßburg 1987: Vollversammlung der Leuenberger Unterzeichnerkirchen
Creators: name: Gang, Dietrich
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 36 Nr. 3 (1987): Ökumenische Rundschau, Band 36, Heft 3
Ghost Imaging of Dark Particles
Creators: name: Estrada, Juan
name: Harnik, Roni
name: Rodrigues, Dario
name: Senger, Matias
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a new way to use optical tools from quantum imaging and quantum communication to search for physics beyond the standard model. Spontaneous parametric down conversion (SPDC) is a commonly used source of entangled photons in which pump photons convert to a signal-idler pair. We propose to search for "dark SPDC" (dSPDC) events in which a new dark sector particle replaces the idler. Though it does not interact, the presence of a dark particle can be inferred by the properties of the signal photon. Examples of dark states include axion-like-particles and dark photons. We show that the presence of an optical medium opens the phase space of the down-conversion process, or decay, which would be forbidden in vacuum. Search schemes are proposed which employ optical imaging and/or spectroscopy of the signal photons. The signal rates in our proposal scales with the second power of the feeble coupling to new physics, as opposed to light-shining-through-wall experiments whose signal scales with coupling to the fourth. We analyze the characteristics of optical media needed to enhance dSPDC and estimate the rate. A bench-top demonstration of a high resolution ghost imaging measurement is performed employing a Skipper-CCD to demonstrate its utility in a dSPDC search.
description: 15 pages, 12 figures, References added
COVINFORM - User Guide
Creators: name: Edwards, James
name: Tautscher, Isabella
Publisher: name: Zenodo
Year: 2023

description: This deliverable summarises the findings of the COVINFORM risk assessment dashboard usabilitytesting sequence, which entailed the following activities:

Workshop 1 (May 2021): online requirements elicitation workshop with public healthpractitioners within the consortium, including discussion of mock-ups

Workshop 2 (October 2022): in-person cognitive walkthrough of the dashboard with the fullconsortium (focus on “Risk Assessment”, “Geospatial Plots”, “Indicator Comparisons”, and“COVID-19 Trends” tabs)

Workshop 3 (July 2023): online cognitive walkthrough of the dashboard with selectedconsortium partners (focus on “Case Studies” tab)

Individual end-user tests (September and October 2023): concurrent think-aloud tests of thefull dashboard conducted with N=12 external end-users

The workshops, conducted with project partners, found a number of minor issues but generallysuggested good usability. The individual usability tests, conducted with external end-users, identifiedseveral more basic challenges. This differential was expected based on the difference in contextualknowledge between the internal workshop participants and the external end-users. The end-userfeedback will prove critical in the finalisation of the dashboard, as well as in planning its futureexploitation.

A note on the deliverable name: in the Description of Action, the deliverable is titled “User Guide”albeit the description indicating that it should contain results of the usability testing, not a user-facingdescription of functions and how to use them. These are available in information boxes on the siteitself, and a walkthrough video is available in D2.9, “Cloud-based interactive dashboard for displayinggeospatial layers”.
An Étude in non-linear Dyson--Schwinger Equations
Creators: name: Kreimer, Dirk
name: Yeats, Karen
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Quantum Algebra (math.QA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We show how to use the Hopf algebra structure of quantum field theory to derive nonperturbative results for the short-distance singular sector of a renormalizable quantum field theory in a simple but generic example. We discuss renormalized Green functions $G_R(α,L)$ in such circumstances which depend on a single scale $L=\ln q^2/μ^2$ and start from an expansion in the scale $G_R(α,L)=1+\sum_k γ_k(α)L^k$. We derive recursion relations between the $γ_k$ which make full use of the renormalization group. We then show how to determine the Green function by the use of a Mellin transform on suitable integral kernels. We exhibit our approach in an example for which we find a functional equation relating weak and strong coupling expansions.
description: 6 pages. Two typos corrected
Identifying and mitigating noise sources in precision pulsar timing data sets
Creators: name: Goncharov, Boris
name: Reardon, D. J.
name: Shannon, R. M.
name: Zhu, Xing-Jiang
name: Thrane, Eric
name: Bailes, M.
name: Bhat, N. D. R.
name: Dai, S.
name: Hobbs, G.
name: Kerr, M.
name: Manchester, R. N.
name: Osłowski, S.
name: Parthasarathy, A.
name: Russell, C. J.
name: Spiewak, R.
name: Thyagarajan, N.
name: Wang, J. B.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Pulsar timing array projects measure the pulse arrival times of millisecond pulsars for the primary purpose of detecting nanohertz-frequency gravitational waves. The measurements include contributions from a number of astrophysical and instrumental processes, which can either be deterministic or stochastic. It is necessary to develop robust statistical and physical models for these noise processes because incorrect models diminish sensitivity and may cause a spurious gravitational wave detection. Here we characterise noise processes for the 26 pulsars in the second data release of the Parkes Pulsar Timing Array using Bayesian inference. In addition to well-studied noise sources found previously in pulsar timing array data sets such as achromatic timing noise and dispersion measure variations, we identify new noise sources including time-correlated chromatic noise that we attribute to variations in pulse scattering. We also identify "exponential dip" events in four pulsars, which we attribute to magnetospheric effects as evidenced by pulse profile shape changes observed for three of the pulsars. This includes an event in PSR J1713$+$0747, which had previously been attributed to interstellar propagation. We present noise models to be used in searches for gravitational waves. We outline a robust methodology to evaluate the performance of noise models and identify unknown signals in the data. The detection of variations in pulse profiles highlights the need to develop efficient profile domain timing methods.
description: 18 pages, 7 figures, 5 tables
COVINFORM - Cloud-based interactive dashboard for displaying geospatial layers (update)
Creators: name: Bonavita, Ilarai
name: Buckley, Matt
name: Plakazhi, Nanditha
name: Sivagnanam, Dinno
Publisher: name: Zenodo
Year: 2023

description: The COVINFORM project investigates the impact of the COVID-19 pandemic across the 27 EU memberstates (MS) and the UK, with a particular focus on vulnerable and marginalised groups. One of theproject outcomes is an interactive risk assessment dashboard that highlights different vulnerabilities(physical, social, economic, and informational) and their COVID-19-related consequences. Theconsortium undertook extensive work to appropriately define a risk framework and identify suitabledata reflecting different dimensions of risk. Following data collection, processing and curationactivities, the data were modelled to create the COVINFORM Risk Score, a composite indicatorassigning a level of risk to each EU MS and the UK. The COVINFORM dashboard provides access to thecollected data, to the COVINFORM Risk Score as well as to the insights derived from the qualitativework undertaken during the project. The dashboard provides users with different statistical graphs andcolour-coded maps showing each country’s levels of risk at three key time points (pre-pandemic, first-wave, second-wave) and allows them to assess the degree with which single dimensions of riskcontribute to the total score. These insights will offer stakeholders the opportunity to explore theirassumptions of risk, particularly for vulnerable groups, during a public health crisis and ultimatelyinform their future responses.

This report provides a brief description of the final COVINFORM dashboard functionalities, details onits technical implementation and an update on the dashboard requirements deriving from the end-users engagement activities. The main output of this deliverable is a video demonstrator including awalk through of the dashboard components and functionalities. This deliverable provides an update ofDeliverable 2.4 ‘Cloud-based interactive dashboard for displaying geospatial layers’ submitted atmonth 22.
Adding Gravitational Memory to Waveform Catalogs using BMS Balance Laws
Creators: name: Mitman, Keefe
name: Iozzo, Dante A. B.
name: Khera, Neev
name: Boyle, Michael
name: De Lorenzo, Tommaso
name: Deppe, Nils
name: Kidder, Lawrence E.
name: Moxon, Jordan
name: Pfeiffer, Harald P.
name: Scheel, Mark A.
name: Teukolsky, Saul A.
name: Throwe, William
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Accurate models of gravitational waves from merging binary black holes are crucial for detectors to measure events and extract new science. One important feature that is currently missing from the Simulating eXtreme Spacetimes (SXS) Collaboration's catalog of waveforms for merging black holes, and other waveform catalogs, is the gravitational memory effect: a persistent, physical change to spacetime that is induced by the passage of transient radiation. We find, however, that by exploiting the Bondi-Metzner-Sachs (BMS) balance laws, which come from the extended BMS transformations, we can correct the strain waveforms in the SXS catalog to include the missing displacement memory. Our results show that these corrected waveforms satisfy the BMS balance laws to a much higher degree of accuracy. Furthermore, we find that these corrected strain waveforms coincide especially well with the waveforms obtained from Cauchy-characteristic extraction (CCE) that already exhibit memory effects. These corrected strain waveforms also evade the transient junk effects that are currently present in CCE waveforms. Lastly, we make our code for computing these contributions to the BMS balance laws and memory publicly available as a part of the python package $\texttt{sxs}$, thus enabling anyone to evaluate the expected memory effects and violation of the BMS balance laws.
description: 13 pages, 9 figures; Corrected a bug affecting the mismatch plot in Figure 7
Bericht über die Tagung des Joint Committee der Konferenz Europäischer Kirchen
Creators: name: Jung, Hans-Gernot
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 36 Nr. 3 (1987): Ökumenische Rundschau, Band 36, Heft 3
Quantization of the Relativistic Fluid in Physical Phase Space on Kähler Manifolds
Creators: name: Holender, L.
name: Santos, M. A.
name: Vancea, I. V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We discuss the quantization of a class of relativistic fluid models defined in terms of one real and two complex conjugate potentials with values on a Kähler manifold, and parametrized by the Kähler potential $K(z,\bar{z})$ and a real number $λ$. In the hamiltonian formulation, the canonical conjugate momenta of the potentials are subjected to second class constraints which allow us to apply the symplectic projector method in order to find the physical degrees of freedom and the physical hamiltonian. We construct the quantum theory for that class of models by employing the canonical quantization methods. We also show that a semiclassical theory in which the Kähler and the complex potential are not quantized has a highly degenerate vacuum. Also, we define and compute the quantum topological number (quantum linking number) operator which has non-vanishing contributions from the Kähler and complex potentials only. Finally, we show that the vacuum and the states formed by tensoring the number operators eigenstates have zero linking number and show that linear combinations of the tensored number operators eigenstates which have the form of entangled states have non-zero linking number.
description: 14 pages, LaTex file. Minor typos corrected
title: Spatial Transformation of a Heritage City by Infill Development: the Case of Raciborz Old Town
Creators: name: Jagiełło-Kowalczyk, Magdalena
name: Stachura, Ewa
name: Poluk, Dominika
Publisher: name: Publishing House of Poznan University of Technology
Year: 2023

description: Zeszyty Naukowe Politechniki Poznańskiej. Architektura, Urbanistyka, Architektura Wnętrz, 15, 65-83
Entanglement-enhanced sensing using a chain of qubits with always-on nearest-neighbor interactions
Creators: name: Yoshinaga, Atsuki
name: Tatsuta, Mamiko
name: Matsuzaki, Yuichiro
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum metrology is the use of genuinely quantum properties such as entanglement as a resource to outperform classical sensing strategies. Typically, entanglement is created by implementing gate operations or inducing many-body interactions. However, existing sensing schemes with these approaches require accurate control of the probe system such as switching on and off the interaction among qubits, which can be challenging for practical applications. Here, we propose an entanglement-enhanced sensing scheme with an always-on nearest-neighbor interaction between qubits. We adopt the transverse field Ising chain as the probe system, making use of the so-called quantum domino dynamics for the generation of the entangled states. In addition to the advantage that our scheme can be implemented without controlling the interactions, it only requires initialization of the system, projective measurements on a single qubit, and control of the uniform magnetic fields. We can achieve an improved sensitivity beyond the standard quantum limit even under the effect of realistic decoherence.
description: 10 pages, 9 figures; version 3: Many minor revisions made, title changed, a new figure added
Passivation kinetics at semiconductor interfaces
Creators: name: Gheorghita, Ligia
Publisher: name: University of British Columbia
Year: 2009

description: The interaction of atomic hydrogen with defects at a GaAs (100) surface was studied by continuously monitoring the photoluminescence of a GaAs wafer in a discharge-flow system at room temperature. It was found that there was an initial irreversible passivation of the surface in the presence of the hydrogen atoms, and this was followed by an improved (but reversible) passivation that occurred when the exposure to atomic hydrogen was discontinued. This reversible recovery of the passivation level was found to follow a non-exponential rate law. A kinetic study of the interaction of atomic hydrogen with the defects at a Si/Si0₂ interface was undertaken at temperatures between 23°C and 330°C. The concentration of defects at the interface was monitored continuously, in situ, with a remote radio frequency (RF) probe, which measured the steady-state photogenerated carrier concentration. The results were similar to those obtained with GaAs. The kinetics of the hydrogen atom loss from both semiconductors have been analyzed in terms of a distribution of trapping sites. A comparison of the GaAs and Si/Si02 systems leads us to conclude that hydrogen atoms can be trapped at interstitial sites near these interfaces. The reaction of molecular hydrogen with defects at the (111) Si/Si0₂ interface has been investigated in the 135°C to 300°C temperature range, using the RF-probe to continuously monitor the rate of removal of electrically active defects. The kinetic parameters calculated from these experiments are compared with earlier workers' electron paramagnetic resonance (EPR) studies of the so-called "P[sub b]" defect. Our results confirm the non-exponential nature of the reaction reported by one of these studies, and are consistent with the rate constants obtained earlier at high temperatures. This process has an activation energy of 1.5 eV. However, the new results indicate that there are other interfacial defects, which could not be detected by EPR, that react with H₂ in a process that has a much lower activation energy (0.5 eV). Similar experiments were conducted on intrinsic and p-type (100) Si/Si0₂ and the same non-exponential rate law was observed for the passivation of interfacial defects in the presence of H₂.
A Time Variation of Proton-Electron Mass Ratio and Grand Unification
Creators: name: Calmet, Xavier
name: Fritzsch, Harald
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Astrophysical observations indicate a time variation of the proton-electron mass ratio and of the fine-structure constant. We discuss this phenomenon in models of Grand Unification. In these models a time variation of the fine-structure constant and of the proton mass are expected, if either the unified coupling constant or the scale of unification changes, or both change. We discuss in particular the change of the proton mass. Experiments in Quantum Optics could be done to check these ideas.
description: 5 pages
COVINFORM - Case study reports and comparative report
Creators: name: Ricoca-Peixoto, Madalena
Publisher: name: Zenodo
Year: 2022

description: This deliverable concerns to the case study research, focusing on vulnerable populations and onidentifying vulnerability and adaptation communalities which increase vulnerability and/or resilienceto COVID-19 impacts across several relevant system levels (e.g., governance, public health, community,information), through a multidisciplinary, intersectional & complex systems approach.

From a conceptual perspective, this deliverable validates the SES Framework proposed to provide acomparative evaluation of the 101 case studies: FS (Portugal); UANTWERP (Belgium); URJC & SAMUR(Spain); SAPIENZA & UCSC (Italy); SYNYO (Austria); SINUS & UGOT (Germany & Sweden); KEMEA(Greece); SWANSEA (Wales); and MDI (England).

All case studies, despite their different objectives, are focused in better understanding the ways thepandemic impacted certain vulnerable communities. In order to do so, secondary (e.g., existingdatabases) and primary data (e.g., interviews) involving the different systems (national and local) hasbeen collated to provide a baseline overview, at different time points of the pandemic.

This first phase of the case study research entails the identification of variables and indicators whichhelp to characterize the systems surrounding the target populations, as well as the outcomes resultingfrom the interaction between systems and within each system. This allows for a better understandingof the resilience of target populations and policy-making organizations from a systems-driven point ofview. This process will allow a more precise determination of the weights of different variables inpredicting resilience that is a central point in the risk assessment model presented in WP2.

As the primary and secondary data collection activities are ongoing, rather than a comparativeevaluation of the findings, this deliverable presents a cross-analysis of the characterization of therelevant systems identified across all case studies. In addition, we present the vulnerability andprotective factors (variables and indicators) hypothesized to mitigate and/or enhance COVID-19impacts on the chosen vulnerable target populations, throughout several time points of the pandemic.

It is expected that the field work will provide insight regarding the fit of these hypothesized factors andthe identification of others not considered, should they prove to be significant.
The Effect of Interacting Dark Energy on Mass-Temperature Relation in Galaxy Clusters
Creators: name: Naseri, Mahdi
name: Firouzjaee, Javad T.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: There are a variety of cosmological models for dark matter and dark energy in which a possible interaction is considered between these two significant components of the universe. We focus on five suggested models of interacting dark matter and dark energy and derive the modified virial theorem for them by developing a previous approach. It provides an opportunity to study the evolution of this modified virial theorem with time and interacting constants for different interacting models. Then we use this obtained virial condition to investigate the modified mass-temperature relation in galaxy clusters via three various methods. It reveals that the effect of interaction between dark matter and dark energy merely appears in the normalization factor of $M\propto T^{\frac{3}{2}}$. This relation also leads to a new constraint on the constants of interacting models, which only depends on the concentration parameter and density profile of the cluster. Then we use five observational data sets to check some proposed figures for the constants of interaction which have been resulted from other observational constraints. Finally, by fitting the observational results to the modified mass-temperature relation, we obtain values for interacting constants of three models and four specific cases of the two remained models. In agreement with many other observational outcomes, we find that according to observational data for masses and temperatures of the galaxy clusters, energy transfer occurs from dark matter to dark energy in the seven investigated models.
description: 22 pages, 9 figures, 2 tables, new figures in terms of Burkert density profile, accepted in Phys. Rev. D