cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Sterblichkeit Älterer während der COVID-19-Pandemie in den ersten Monaten des Jahres 2020. Gab es Nord-Süd-Unterschiede?
Creators: name: Nowossadeck, Enno
Publisher: name: Robert Koch-Institut
Year: 2020
Subjects: subject: Übersterblichkeit
subject: Kalenderwochen
subject: COVID-19
subject: Norddeutschland
subject: Süddeutschland
subject: 610 Medizin und Gesundheit

description: COVID-19 ist eine dynamisch verlaufende Krankheit, die in einigen Fällen zum Tod führen kann. Der vorliegende Beitrag hat das Ziel, Zeiträume einer erhöhten Gesamtsterblichkeit zu identifizieren, um Übersterblichkeit präziser messen zu können. Untersucht wurde die Entwicklung der Sterberaten in der Bevölkerung ab 65 Jahren. Untersuchungsregionen waren Deutschland insgesamt, eine süddeutsche Region (Bundesländer Baden-Württemberg und Bayern) und eine norddeutsche Region (Schleswig-Holstein, Mecklenburg-Vorpommern und Brandenburg). Der Beitrag analysiert kalenderwöchentliche Sterbedaten, die vom Statischen Bundesamt (Destatis) für die ersten 23 Kalenderwochen 2020 veröffentlicht wurden. Zum Vergleich wird derselbe Zeitraum des Jahres 2016 herangezogen, des letzten Jahres ohne grippebedingte Exzess-Mortalität. In den Kalenderwochen zehn bis 15 stiegen die Sterberaten der älteren Bevölkerung in der süddeutschen Region im Vergleich zur norddeutschen Region und im Vergleich zu 2016 in einem außergewöhnlichen Maß an. Der Höhepunkt wurde in den Kalenderwochen 14 und 15 erreicht. Gegenüber dem Höhepunkt der Inzidenzentwicklung ist dies ein Zeitverzug von zwei bis drei Wochen. Seit dem Höhepunkt sinken die Sterberaten wieder, liegen aber bis zur 18. Kalenderwoche über den Werten von 2016. Zusammenfassend wird geschlussfolgert, dass die erhöhten Sterberaten der COVID-19-Pandemie und nicht dem jährlichen Influenzageschehen zuzuschreiben sind.
(500770) Elizabeth Bracher
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.
title:  Utopia e costruzione di una società di giustizia, e più oltre di una società fraterna
Creators: name: Colombo  ,  Arrigo
Publisher: name: Roma TrE-Press
Year: 2019

description: Questo intervento non è dedicato a Bloch e al suo Geist der Utopie, dove l'utopia si presenta prevalentemente come una forma di conoscenza o un Wachtraum che sublima la conoscenza stessa; né al più maturo e voluminoso, ma anche pletorico,  Prinzip Hoffnung in cui Bloch sviluppa l'utopia come processo storico-materialistico o di uomo-natura, e dove Marx è il grande maestro; di Bloch tuttavia si parla a proposito dell'utopia storica (dopo quella letteraria) e della sua genesi. È invece dedicato in toto all'utopia e anzitutto alla precisazione del suo senso, di contro alla sua degradazione nel progetto puramente immaginario e irreale. È dedicato Soprattutto all'utopia storica, cioè al progetto dell'umanità, e al processo in corso: la costruzione di una società di giustizia in cui l'umanità è impegnata dall'età delle rivoluzioni; e di una società fraterna, il cui principio è già affermato nella Dichiarazione universale dei diritti del 1948: ogni uomo deve comportarsi con gli altri uomini come con dei fratelli. Da notare il deve; è già inteso come un dovere.
description: B@belonline vol. 5 Ernst Bloch e il principio utopico ieri e oggi
The radiative decay of scalar glueball from lattice QCD
Creators: name: Zou, Jintao
name: Gui, Long-Cheng
name: Chen, Ying
name: Liang, Jian
name: Jiang, Xiangyu
name: Qin, Wen
name: Yang, Yi-Bo
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We perform the first lattice QCD study on the radiative decay of the scalar glueball to the vector meson $ϕ$ in the quenched approximation. The calculations are carried out on three gauge ensembles with different lattice spacings, which enable us to do the continuum extrapolation. We first revisit the radiative $J/ψ$ decay into the scalar glueball $G$ and obtain the partial decay width $Γ(J/ψ\to γG)=0.578(86)~\text{keV}$ and the branching fraction $\text{Br}(J/ψ\to γG) = 6.2(9)\times 10^{-3}$. We then extend the similar calculation to the process $G\to γϕ$ and get the partial decay width $Γ(G \to γϕ)= 0.074(47)~\text{keV}$, which implies that the combined branching fraction of $J/ψ\toγG\to γγϕ$ is as small as $\mathcal{O}(10^{-9})$ such that this process is hardly detected by the BESIII experiment even with the large $J/ψ$ sample of $\mathcal{O}(10^{10})$. With the vector meson dominance model, the two-photon decay width of the scalar glueball is estimated to be $Γ(G\toγγ)=0.53(46)~\text{eV}$, which results in a large stickiness $S(G)\sim \mathcal{O}(10^4)$ of the scalar glueball by assuming the stickiness of $f_2(1270)$ to be one.
description: 13 pages,11 figures. This version is to be published in SCPMA
title: Sweeteners: majority of studies confirm no adverse health effects – however, the study situation is insufficient: BfR Opinion No 004/2023 of 7 February 2023
Creators: name: Bundesinstitut Für Risikobewertung
Publisher: name: Bundesbehörden und Einrichtungen im Geschäftsbereich des Bundesministeriums für Ernährung und Landwirtschaft (BMEL)
Year: 2023
Subjects: subject: 000

description: BfR-Stellungnahmen, vol. 2023, no. 004
Tensor space representations of Temperley-Lieb algebra via orthogonal projections of rank $r \geq 1$
Creators: name: Bytsko, Andrei
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Algebra (math.QA)
subject: Representation Theory (math.RT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Unitary representations of the Temperley-Lieb algebra $TL_N(Q)$ on the tensor space $({\mathbb C^n})^{\otimes N}$ are considered. Two criteria are given for determining when an orthogonal projection matrix $P$ of a rank $r$ gives rise to such a representation. The first of them is the equality of traces of certain matrices and the second is the unitary condition for a certain partitioned matrix. Some estimates are obtained on the lower bound of $Q$ for a given dimension $n$ and rank $r$. It is also shown that if $4r>n^2$, then $Q$ can take only a discrete set of values determined by the value of $n^2/r$. In particular, the only allowed value of $Q$ for $n=r=2$ is $Q=\sqrt{2}$. Finally, properties of the Clebsch-Gordan coefficients of the quantum Hopf algebra $U_q(su_2)$ are used in order to find all $r=1$ and $r=2$ unitary tensor space representations of $TL_N(Q)$ such that $Q$ depends continuously on $q$ and $P$ is the projection in the tensor square of a simple $U_q(su_2)$ module on the subspace spanned by one or two joint eigenvectors of the Casimir operator $C$ and the generator $K$ of the Cartan subalgebra.
description: 26 pages, LaTeX
Neumania (Neumania) ambigua Piersig 1906
Creators: name: SAVATENALINTON, SUKONTHIP
name: SMIT, HARRY
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Trombidiformes
Unionicolidae
Neumania
Neumania ambigua

description: Neumania (Neumania) ambigua Piersig, 1906
Material examined. 0/1/0, Huay Talad Reservoir, Buriram Province, 14° 52ʹ 00.1ʺ N, 103° 04ʹ 24.6ʺ E, 4-x-2010; 1/3/0, rice field, Sisaket Province, 14° 59ʹ 28.4ʺ N, 104° 22ʹ 56.7ʺ E, 5-x-2010; 2/4/2, Oxbow lake Kud Seum, Yasothon Province, 15° 47.090ʹ N, 104° 09.269ʹ E, 24-x-2010; 0/1/0, rice field, Yasothon Province, Thailand, 15° 44.688ʹ N, 104° 13.244ʹ E, 24-x-2010; 0/1/0, Sirindhorn Dam, Ubon Ratchathani Province, 15° 10.623ʹ N, 105° 21.461ʹ E, 24-x-2010; 1/1/0, rice field, Ubon Ratchathani Province, 15° 23.604ʹ N, 104° 48.907ʹ E, 25-x-2010; 1/2/0, rice field, Amnat Chareon Province, 16° 03.244ʹ N, 104° 38.105ʹ E, 25-x-2010; 0/1/0, Nong Chang Yai Reservoir, Ubon Ratchathani Province, 15° 23.874ʹ N, 104° 49.756ʹ E, 25-x-2010; 2/0/0, Huay Wang Nong Reservoir, Ubon Ratchathani Province, 15° 15.596ʹ N, 104° 53.811ʹ E, 24-x-2010; 2/0/0, Kud Pla Khoa Swamp, Ubon Rathchathani Province, 15° 12.373ʹ N, 104° 51.700ʹ E, 10-ii-2011; 2/1/0, Huay Nam Kham Noi rivulet, Yasothon Province, Thailand, 15° 48.779ʹ N, 104° 09.415ʹ E, 10-ii-2011; 1/0/0, Chi River, Yasothon Province, 15° 48.400ʹ N, 104° 06.760ʹ E, 11-ii-2011; 1/2/0, Kon Chum Dam, Nakhon Ratchasima Province, 14° 59ʹ 2.99ʺ N, 102° 3ʹ 15.25ʺ E, 14-ii-2011.
Remarks. Neumania ambigua was previously reported from Thailand by Imamura (1964). It is a widespread species, occurring from Australia to India.
description: Published as part of SAVATENALINTON, SUKONTHIP & SMIT, HARRY, 2017, New records of water mites from standing waters in Thailand, with the description of nine new species (Acari: Hydrachnidia), pp. 69-91 in Zootaxa 4312 (1) on page 78, DOI: 10.11646/zootaxa.4312.1.3, http://zenodo.org/record/852086
Glue in hadrons at medium resolution and the QCD instanton vacuum
Creators: name: Liu, Wei-Yang
name: Shuryak, Edward
name: Zahed, Ismail
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We discuss a general framework for the evaluation of the gluonic form factors in light hadrons at low momentum transfer, in the QCD instanton vacuum. At medium resolution of the order of the inverse mean instanton size, the glue is mostly localized in single or pair of pseudoparticles, and globally constrained by the fluctuations of their topological charges. These pseudoparticles trap light quarks, giving rise to emerging multiflavor 't Hooft interactions. We explicitly evaluate the gluonic scalar, pseudoscalar, energy-momentum tensor (EMT), and the leading C-odd and C-even three gluons hadronic form factors, at next to leading order (NLO) in the instanton density, including molecular clusters of like and unlike instantons. We use the results for the EMT to address the contribution of the gluons in Ji$^\prime$s mass and spin sum rules, at low resolution. When evolved, our results for the mass and spin composition of the nucleon, are shown to be in good agreement with the recently reported lattice results at higher resolution.
description: 67 pages, 16 figures
title: Aniline in finger paints: Health impairments for children shouldn’t be expected according to current understanding: BfR Opinion No 034/2023 of 24 July 2023
Creators: name: Bundesinstitut Für Risikobewertung
Publisher: name: Bundesbehörden und Einrichtungen im Geschäftsbereich des Bundesministeriums für Ernährung und Landwirtschaft (BMEL)
Year: 2023
Subjects: subject: 000

description: BfR-Stellungnahmen, vol. 2023, no. 034
Supplementary Material from Mechanics of pressurized cellular sheets
Creators: name: Chandler, Thomas Graham John
name: Ferria, Jordan
name: Shorthose, Oliver
name: Allain, Jean-Marc
name: Maiolino, Perla
name: Boudaoud, Arezki
name: Vella, Dominic
Publisher: name: The Royal Society
Year: 2025
Subjects: classificationCode: 320203
subject: Clinical microbiology

description: Further details of mathematical modelling.
MPEC 2023-U16 : 2020 FE
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
(500769) William Cross
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.
Modelling tank drainage using a simple apparatus
Creators: name: Rother, Michael A.
Publisher: name: Taylor & Francis
Year: 2023
Subjects: Biological Sciences not elsewhere classified
Mental Health
Computational Biology

description: A straightforward experimental set-up, requiring a two-liter bottle, a ruler and a stopwatch, is used to provide data appropriate for modelling with Torricelli's Law in the simplest case, and a more sophisticated differential equation when losses are taken into account and a pipe extension is considered. With only an exit hole included in the model, the governing equation can be integrated analytically to find the liquid height in the tank as a function of time. In the more complicated instance, the governing equation requires numerical integration. In both cases, a discharge coefficient can be employed as a fitting parameter. Excellent agreement between the experimental data and the theoretical modelling results has been obtained. An analytical solution with comparable accuracy to the numerical version is also possible for a pipe extension under the operating conditions considered here. Student reception of the experiment was generally positive, although some nuances were not fully grasped.
The Rosenzweig Porter model revisited for the three Wigner Dyson symmetry classes
Creators: name: Cadez, Tilen
name: Nandy, Dillip
name: Rosa, Dario
name: Andreanov, Alexei
name: Dietz, Barbara
Publisher: name: arXiv
Year: 2024
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We present numerical results for the Rosenzweig Porter model for all symmetry classes of the Dyson threefold way. We analyzed the fluctuation properties in the eigenvalue spectra, and compared them with existing and new analytical results. Based on these results we propose characteristics of the spectral properties as measures to explore the transition from Poisson to Wigner Dyson WD statistics. Furthermore, we performed thorough studies of the properties of the eigenvectors in terms of the fractal dimensions, the Kullback Leibler KL divergences and the fidelity susceptibility. The ergodic and Anderson transitions take place at the same parameter values and a finite size scaling analysis of the KL divergences at the transitions yields the same critical exponents for all three WD classes, thus indicating superuniversality of these transitions.
(500768) Bertha Ager
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.
High-order harmonic spectroscopy for molecular imaging of polyatomic molecules
Creators: name: Negro, M.
name: Devetta, M.
name: Faccialà, D.
name: De Silvestri, S.
name: Vozzi, C.
name: Stagira, S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: High-order harmonic generation is a powerful and sensitive tool for probing atomic and molecular structures, combining in the same measurement an unprecedented attosecond temporal resolution with a high spatial resolution, of the order of the angstrom. Imaging of the outermost molecular orbital by high-order harmonic generation has been limited for a long time to very simple molecules, like nitrogen. Recently we demonstrated a technique that overcame several of the issues that have prevented the extension of molecular orbital tomography to more complex species, showing that molecular imaging can be applied to a triatomic molecule like carbon dioxide. Here we report on the application of such technique to nitrous oxide (N2O) and acetylene (C2H2). This result represents a first step towards the imaging of fragile compounds, a category which includes most of the fundamental biological molecules.
title:  Bloch e l’utopia della Menschenwürde
Creators: name: Cacciatore  ,  Giuseppe
Publisher: name: Roma TrE-Press
Year: 2019

description: Quale futuro per un’idea politica e etica di dignità umana? Il saggio prende spunto da questa domanda, rifacendosi alle analisi di Bloch in proposito. Nell’opera di Bloch il futuro non è solo il superamento di uno stadio precedente per arrivare ad un’analisi evolutiva ed escatologica che annunci un regno dei fini tanto religioso quanto politico-ideologico. In Bloch, il futuro è ciò che sta per accadere. Grazie alla straordinaria intuizione della Ungleichzeitigkeit (della non-contemporaneità dei tempi storici), infatti, il futuro può anche essere ciò che non è stato e avrebbe potuto essere, come il futuro di un passato che non ha manifestato la sua positività e che può ancora essere rinvenuto. Uno dei leitmotiv del pensiero di Bloch è l’idea di un’età di transizione che non è stata e non sarà mai compiutamente e definitivamente superata. Questo dispositivo teorico generale è fondamentalmente caratterizzato dal tentativo di mantenere una connessione equilibrata tra la calda corrente della speranza e il freddo flusso della analisi storica. Entro questo quadro, credo, le idee blochiane di democrazia e di diritti umani, intesi come eredità da conservare e proteggere, possono oggi ricevere rinnovata attenzione.
description: B@belonline vol. 5 Ernst Bloch e il principio utopico ieri e oggi
(500766) Reginald Henry Cross
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.
Transmit and Receive Antenna Port Selection for Channel Capacity Maximization in Fluid-MIMO Systems
Creators: name: Efrem, Christos N.
name: Krikidis, Ioannis
Publisher: name: arXiv
Year: 2024
Subjects: subject: Signal Processing (eess.SP)
subject: Information Theory (cs.IT)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: In this letter, we study a discrete optimization problem, namely, the maximization of channel capacity in fluid multiple-input multiple-output (fluid-MIMO) systems through the selection of antenna ports/positions at both the transmitter and the receiver. First, we present a new joint convex relaxation (JCR) problem by using an upper bound on the channel capacity and exploiting the binary nature of optimization variables. Then, we develop and analyze two optimization algorithms with different performance-complexity tradeoffs. The first algorithm is based on JCR and reduced exhaustive search (JCR&RES), while the second on JCR and alternating optimization (JCR&AO).
description: 5 pages, 5 figures
title: Characterizing the Variability and Heterogeneity of Stem Cells by Engineering Methods
Creators: name: Geng, Junnan
Publisher: name: Utah State University
Year: 2021

description: With their self-renewal and cellular differentiation capacities, stem cells could be the ideal model for exploring the mechanisms that regulate cell differentiation, organ maintenance, novel cellular therapies, etc. This research focuses on the exploration of better engineering methods to replace the invasive and inconvenient traditional methods to characterize the stem cell differentiation process and heterogeneity of cancer stem cells.
First, label-free Raman spectroscopy was applied to characterize the gradual change during the differentiation process of live human neural stem cells in in vitro cultures. Eight key spectral biomarkers were selected and based on those biomarkers, three machine learning-based analysis methods were used to predict cell types. Among those methods, the artificial neural network had the highest predictive accuracy compared to the logistic regression model and linear discriminant analysis. In addition, our mathematical model could also classify cell types at the single-cell level. Next, the brain cancer stem cells were studied with microfluidic devices to identify their heterogeneity and migration behavior. The microfluidic devices were fabricated to recapitulate the 3D-confined interstitial and chemotactic environment. The invasion speed of brain cancer stem cells of glioblastoma multiforme (GBM) was accelerated with the increase of growth factors gradient (EGF and basic-FGF). Furthermore, this platform could also differentiate different cell subtypes of GBM based on their chemotactic invasion and be used for drug screening (e.g. resveratrol). Third, using our microfluidic device, one type of cell migration modes—blebbing migration, was specifically explored. GBM cells were cultured under the chemotactic environment to study the relationship between ion channels (NHE-1 and NKCC-1) and blebbing dynamics. The blebbing dynamics were significantly influenced by inhibitors (NKCC1, NHE1, and Myosin). The ion channel regulations (i.e., polarity and direction) were found to relate to blebbing dynamics, which in turn were affected by gradient conditions. Lastly, the two shapes of sub-micron particles of ZnO were fabricated and their bio-imaging and potential anti-cancer properties were shown.
Blow-up of classical solutions of quasilinear wave equations in one space dimension
Creators: name: Haruyama, Yuki
name: Takamura, Hiroyuki
Publisher: name: arXiv
Year: 2024
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: primary 35L72, secondary 35B44

description: This paper studies the upper bound of the lifespan of classical solutions of the initial value problems for one dimensional wave equations with quasilinear terms of space-, or time-derivatives of the unknown function. The results are same as those of the semilinear case. But it is quite meaningful to consider this kind of problems for the purpose to cover the optimality of the general theory for nonlinear wave equations by many model equations as far as possible.
description: 19 pages. Introduction is modified. The concluding remarks are added
(500765) Elsie Violet Cross
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.
Radiative properties of multi-carrier bound excitons in GaAs
Creators: name: Karin, Todd
name: Barbour, Russell
name: Santori, Charles
name: Yamamoto, Yoshihisa
name: Hirayama, Yoshiro
name: Fu, Kai-Mei C.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Excitons in semiconductors can have multiple lifetimes due to spin dependent oscillator strengths and interference between different recombination pathways. In addition, strain and symmetry effects can further modify lifetimes via the removal of degeneracies. We present a convenient formalism for predicting the optical properties of ${k=0}$ excitons with an arbitrary number of charge carriers in different symmetry environments. Using this formalism, we predict three distinct lifetimes for the neutral acceptor bound exciton in GaAs, and confirm this prediction through polarization dependent and time-resolved photoluminescence experiments. We find the acceptor bound-exciton lifetimes to be ${T_o (1,3,3/4)}$ where ${T_o = (0.61 \pm 0.12) \text{ns}}$. Furthermore, we provide an estimate of the intra-level and inter-level exciton spin-relaxation rates.
description: 5 pages, 3 figures, supplemental information included
Haldane graphene billiards versus relativistic neutrino billiards
Creators: name: Nguyen, Dung Xuan
name: Dietz, Barbara
Publisher: name: arXiv
Year: 2024
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study fluctuation properties in the energy spectra of finite-size honeycomb lattices, graphene billiards, subject to the Haldane-model onsite potential and next-nearest neighbor interaction at critical points, referred to as Haldane graphene billiards in the following. The billiards had the shapes of a rectangular billiard with integrable dynamics, one with chaotic dynamics, and one whose shape has, in addition, threefold rotational symmetry. It had been shown that the spectral properties of the graphene billiards coincide with those of the nonrelativistic quantum billiard with the corresponding shape, both at the band edges and in the region of low energy excitations around the Dirac points at zero energy. There, the dispersion relation is linear and, accordingly, the spectrum is described by the same relativistic Dirac equation for massless half-spin particles as relativistic neutrino billiards, whose spectral properties agree with those of nonrelativistic quantum billiards with violated time-reversal invariance. Deviations from the expected behavior are attributed to differing boundary conditions and backscattering at the boundary, which leads to a mixing of valley states corresponding to the two Dirac points, that are mapped into each other through time reversal. We employ a Haldane model to introduce a gap at one of the two Dirac points so that backscattering is suppressed in the energy region of the gap and demonstrate that there the correlations in the spectra comply with those of the neutrino billiard of the corresponding shape.
(500764) Ellen Jane Mathews
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.
Spectroscopic variability of two Oe stars
Creators: name: Rauw, G.
name: Morel, T.
name: Naze, Y.
name: Eversberg, T.
name: Alves, F.
name: Arnold, W.
name: Bergmann, T.
name: Viegas, N. G. Correia
name: Fahed, R.
name: Fernando, A.
name: Gonzalez-Perez, J. N.
name: Carreira, L. F. Gouveia
name: Hempelmann, A.
name: Hunger, T.
name: Knapen, J. H.
name: Leadbeater, R.
name: Dias, F. Marques
name: Mittag, M.
name: Moffat, A. F. J.
name: Reinecke, N.
name: Ribeiro, J.
name: Romeo, N.
name: Gallego, J. Sanchez
name: Santos, E. M. Dos
name: Schanne, L.
name: Schmitt, J. H. M. M.
name: Schroeder, K. -P.
name: Stahl, O.
name: Stober, Ba.
name: Stober, Be.
name: Vollmann, K.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The Oe stars HD45314 and HD60848 have recently been found to exhibit very different X-ray properties: whilst HD60848 has an X-ray spectrum and emission level typical of most OB stars, HD45314 features a much harder and brighter X-ray emission, making it a so-called gamma Cas analogue. Monitoring the optical spectra could provide hints towards the origin of these very different behaviours. We analyse a large set of spectroscopic observations of HD45314 and HD60848, extending over 20 years. We further attempt to fit the H-alpha line profiles of both stars with a simple model of emission line formation in a Keplerian disk. Strong variations in the strengths of the H-alpha, H-beta, and He I 5876 emission lines are observed for both stars. In the case of HD60848, we find a time lag between the variations in the equivalent widths of these lines. The emission lines are double peaked with nearly identical strengths of the violet and red peaks. The H-alpha profile of this star can be successfully reproduced by our model of a disk seen under an inclination of 30 degrees. In the case of HD45314, the emission lines are highly asymmetric and display strong line profile variations. We find a major change in behaviour between the 2002 outburst and the one observed in 2013. This concerns both the relationship between the equivalent widths of the various lines and their morphologies at maximum strength (double-peaked in 2002 versus single-peaked in 2013). Our simple disk model fails to reproduce the observed H-alpha line profiles of HD45314. Our results further support the interpretation that Oe stars do have decretion disks similar to those of Be stars. Whilst the emission lines of HD60848 are explained by a disk with a Keplerian velocity field, the disk of HD45314 seems to have a significantly more complex velocity field that could be related to the phenomenon that produces its peculiar X-ray emission.
description: Accepted for Publication in A&A
Love stories in a differential equations classroom
Creators: name: Ma, Yanping
name: Tang, Gail
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Medicine
subject: Neuroscience
subject: Science Policy
subject: Sociology
subject: FOS: Sociology
subject: Developmental Biology
subject: Mental Health

description: We believe that developing cultural competencies can help students learn mathematics and conversely that learning mathematical content can help students learn about themselves and others. Using frameworks introduced by Rendón (2009) and Gutiérrez (2018), we present a five-part bundle of activities for undergraduate differential equations course instructors, including one pre-activity reflection assignment, three modeling activities, and a final project. The Pre-Activity Assignment engages students to draw on their own personal and/or cultural experiences with the concept of love. Three activities focus on developing revision skills in mathematical modeling and practicing methods of solving systems of ordinary differential equations (ODEs). In these activities, students would collaborate to construct a relationship model consisting of a system of first-order linear ODEs and solve different model iterations with the characteristic polynomial, matrix form, or Laplace transform method. The final project connects the reflections in Pre-Activity Assignment with the skills developed in the three activities by inviting students to create a relationship scenario, model, revise, solve it, and present the conclusions. By engaging in this set of assignments, students connect personal and cultural experiences with the concept of love and perceive themselves and their peers in the curriculum, fostering a sense of belonging and relevance.
On the abundance of extraterrestrial life after the Kepler mission
Creators: name: Wandel, Amri
Publisher: name: arXiv
Year: 2014
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The data recently accumulated by the Kepler mission have demonstrated that small planets are quite common and that a significant fraction of all stars may have an Earth-like planet within their Habitable Zone. These results are combined with a Drake-equation formalism to derive the space density of biotic planets as a function of the relatively modest uncertainty in the astronomical data and of the (yet unknown) probability for the evolution of biotic life, Fb. I suggest that Fb may be estimated by future spectral observations of exoplanet biomarkers. If Fb is in the range 0.001 -- 1 then a biotic planet may be expected within 10 -- 100 light years from Earth. Extending the biotic results to advanced life I derive expressions for the distance to putative civilizations in terms of two additional Drake parameters - the probability for evolution of a civilization, Fc, and its average longevity. For instance, assuming optimistic probability values (Fb Fc 1) and a broadcasting longevity of a few thousand years, the likely distance to the nearest civilizations detectable by SETI is of the order of a few thousand light years. The probability of detecting intelligent signals with present and future radio telescopes is calculated as a function of the Drake parameters. Finally, I describe how the detection of intelligent signals would constrain the Drake parameters.
description: 12 pages, 3 figures, accepted for publication, International Journal of Astrobiology 2015
Spin-resolved nonlocal transport in proximitized Rashba nanowires
Creators: name: Szumniak, Paweł
name: Loss, Daniel
name: Klinovaja, Jelena
Publisher: name: arXiv
Year: 2024
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Non-equilibrium transport in hybrid semiconductor-superconductor nanowires is crucial for many quantum phenomena such as generating entangled states via cross Andreev reflection (CAR) processes, detecting topological superconductivity, reading out Andreev spin qubits, coupling spin qubits over long distances and so on. Here, we investigate numerically transport properties of a proximitized Rashba nanowire that hosts spin-polarized low-energy quasiparticle states. We show that the spin polarization in such one-dimensional Andreev bands, extended over the entire nanowire length, can be detected in nonlocal transport measurements with tunnel-coupled side leads that are spin polarized. Remarkably, we find an exact correspondence between the sign of the nonlocal conductance and the spin density of the superconducting quasiparticles at the side lead position. We demonstrate that this feature is robust to moderate static disorder. As an example, we show that such a method can be used to detect spin inversion of the bands, accompanying the topological phase transition (TPT) for realistic system parameters. Furthermore, we show that such effects can be used to switch between CAR and elastic cotunneling (ECT) processes by tuning the strength of either the electric or the magnetic field. These findings hold significant practical implications for state-of-the-art transport experiments in such hybrid systems.
(500763) Stanley A. Cross
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.
(500762) Eliza Ann Nutley
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.
Symmetries for the 4HDM. II. Extensions by rephasing groups
Creators: name: Shao, Jiazhen
name: Ivanov, Igor P.
name: Korhonen, Mikko
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We continue classification of finite groups which can be used as symmetry group of the scalar sector of the four-Higgs-doublet model (4HDM). Our objective is to systematically construct non-abelian groups via the group extension procedure, starting from the abelian groups $A$ and their automorphism groups $\mathrm{Aut}(A)$. Previously, we considered all cyclic groups $A$ available for the 4HDM scalar sector. Here, we further develop the method and apply it to extensions by the remaining rephasing groups $A$, namely $A = \mathbb{Z_2}\times\mathbb{Z_2}$, $\mathbb{Z_4}\times \mathbb{Z_2}$, and $\mathbb{Z_2}\times \mathbb{Z_2}\times \mathbb{Z_2}$. As $\mathrm{Aut}(A)$ grows, the procedure becomes more laborious, but we prove an isomorphism theorem which helps classify all the options. We also comment on what remains to be done to complete the classification of all finite non-abelian groups realizable in the 4HDM scalar sector without accidental continuous symmetries.
description: 27 pages, 0 figures, 4 tables. v2: extra clarifications, matches the published version
MPEC 2023-U17 : 2022 VV
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Determining energy relaxation length scales in two-dimensional electron gases
Creators: name: Billiald, Jordan
name: Backes, Dirk
name: König, Jürgen
name: Farrer, Ian
name: Ritchie, David
name: Narayan, Vijay
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present measurements of the energy relaxation length scale $\ell$ in two-dimensional electron gases (2DEGs). A temperature gradient is established in the 2DEG by means of a heating current, and then the elevated electron temperature $T_e$ is estimated by measuring the resultant thermovoltage signal across a pair of deferentially biased bar-gates. We adapt a model by Rojek and König [Phys. Rev. B \textbf{90}, 115403 (2014)] to analyse the thermovoltage signal and as a result extract $\ell$, $T_e$, and the power-law exponent $α_i$ for inelastic scattering events in the 2DEG. We show that in high-mobility 2DEGs, $\ell$ can attain macroscopic values of several hundred microns, but decreases rapidly as the carrier density $n$ is decreased. Our work demonstrates a versatile low-temperature thermometry scheme, and the results provide important insights into heat transport mechanisms in low-dimensional systems and nanostructures. These insights will be vital for practical design considerations of future nanoelectronic circuits.
description: Version accepted for publication in Appl. Phys. Lett. (2015)
Radial and orbital excitation energies of charmonium
Creators: name: Galloway, B. A.
name: Knecht, P.
name: Koponen, J.
name: Davies, C. T. H.
name: Lepage, G. P.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: The charmonium system has several excited states below the energy threshold for decay into $D$ and $\bar{D}$ mesons, which can in principle be studied accurately in lattice QCD. Studies that include many states in the spectrum have typically only been done at one value of the lattice spacing and with relatively heavy light quarks in the sea. Here we give preliminary results for radial and orbital excitation energies for charmonium from a calculation on 2+1+1 MILC configurations at multiple lattice spacings and including physical values for $u/d$ quark masses. We use the HISQ formulation for $c$ to obtain small discretisation errors and smeared operators to improve excited state overlap.
description: 7 pages, 4 figures. Presented at the 32nd International Symposium on Lattice Field Theory (Lattice 2014), 23-28 June 2014, New York, USA
title: Development of Decision Making Techniques for Analysing the Designation of the Northern Sea Route (NSR)
Creators: name: Ahmad Najib, AF
Publisher: name: Liverpool John Moores University
Year: 2020

description: The prospect of being able to shorten the route between Europe and the Far East using the NSR as a permanent shipping lane is attracting increasing interest. This is why the use of the NSR is now a major topic, especially in ﬁnancial circles, amongst politicians, and shipping operators. Numerous assessments to determine the potential cost advantage of using the NSR as a transit route have been conducted throughout recent years. These are, however conflicting in their conclusions and a final answer to the question is therefore lacking. The primary aim of this research is the application of decision-making tools to analyse the current routes of the NSR. Accordingly, this will lead to the development of decision-making techniques that will formulate a tool for shipping companies to select the most cost-effective route(s) for travelling between the Far East and European regions.
Modified mean field ansatz for charged polarons in a Bose-Einstein condensate
Creators: name: Olivas, Ubaldo Cavazos
name: Ardila, Luis A. Peña
name: Jachymski, Krzysztof
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Ionic Bose polarons are quantum entities emerging from the interaction between an ion and a Bose-Einstein condensate (BEC), featuring long-ranged interactions that can compete with the gas healing length. This can result in strong interparticle correlations and enhancement of gas density around the ion. One possible approach to describe this complex system with high accuracy relies on numerical treatment such as the quantum Monte Carlo (QMC) techniques. Nevertheless, it is computationally very expensive and does not easily allow to study the system dynamics. On the other hand, a mean-field based variational ansatz in the co-moving frame can capture a sizeable change in the gas density. We apply it to the case of regularized ion-atom potential and find that it qualitatively reproduces the full numerical results. In addition, we also study the system of two pinned ions, focusing on their effective interaction induced by the bath. This approach seems to be promising for studying transport and nonequilibrium dynamics of charged (bi)polarons in condensed media.
description: 6 pages, 9 figures
Intertwined orders from symmetry projected wavefunctions of repulsively interacting Fermi gases in optical lattices
Creators: name: Leprévost, A.
name: Juillet, O.
name: Frésard, R.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Unconventional strongly correlated phases of the repulsive Fermi-Hubbard model, which could be emulated by ultracold vapors loaded in optical lattices, are investigated by means of energy minimizations with quantum number projection before variation and without any assumed order parameter. In a tube-like geometry of optical plaquettes to realize the four-leg ladder Hubbard Hamiltonian, we highlight the intertwining of spin-, charge-, and pair-density waves embedded in a uniform d-wave superfluid background. As the lattice filling increases, this phase emerges from homogenous states exhibiting spiral magnetism and evolves towards a doped antiferromagnet. A concomitant enhancement of long-ranged d-wave pairing correlations is also found. Numerical tests of the approach for two-dimensional clusters are carried out, too.
description: 26 pages, 15 figures ; replaced with the published manuscript ; substantial changes from previous version
(500761) Charles Bracher Cross
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.