cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Enhanced energy deposition and carrier generation in silicon induced by two-color intense femtosecond laser pulses
Creators: name: Tani, Mizuki
name: Sasaki, Kakeru
name: Shinohara, Yasushi
name: Ishikawa, Kenichi L.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We theoretically investigate the optical energy absorption of crystalline silicon subject to dual-color femtosecond laser pulses, using the time-dependent density functional theory (TDDFT). We employ the modified Becke-Johnson (mBJ) exchange-correlation potential which reproduces the experimental direct bandgap energy $E_g$. We consider situations where the one color is in the ultraviolet (UV) range above $E_g$ and the other in the infrared (IR) range below it. The energy deposition is examined as a function of mixing ratio $η$ of the two colors with the total pulse energy conserved. Energy transfer from the laser pulse to the electronic system in silicon is dramatically enhanced by simultaneous dual-color irradiation and maximized at $η\sim 0.5$. Increased is the number of generated carriers, not the absorbed energy per carrier. The effect is more efficient for lower IR photon energy, or equivalently, larger vector-potential amplitude. As the underlying mechanism is identified the interplay between intraband electron motion in the {\it valence} band (before excitation) driven by the IR component and resonant valence-to-conduction interband excitation (carrier injection) induced by the UV component. The former increases excitable electrons which pass through the $k$ points of resonant transitions. The effect of different multiphoton absorption paths or intraband motion of carriers generated in the conduction band play a minor role.
description: 14 pages, 20 figures
Implications of New Quantum Spin Perspective In Quantum Gravity
Creators: name: Vyas, Rakshit P.
name: Joshi, Mihir J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Consequences of new quantum spin perspective in quantum gravity are far-reaching. Results of this novel perspective in loop quantum gravity, i.e., the modification of the equation of geometrical operators such as the area and the volume operator are known. Using newly proposed formula from this perspective, the magnitude of fundamental constants such as the reduced Planck constant \(\hbar\), the gravitational constant \(G\), the speed of light \(c\), the Boltzmann constant \(k_β\), the fine structure constant \(α\), can be validated. With the aid of this perspective, we find new formulas for the fundamental Planckian quantities and the derived Planckian quantities. We also propose novel formulas for the Planck star such as the size, the curvature, the surface area and the size of black hole (for the Planck star) without modifying its significance. The relation of the quantum spin with the Planck temperature \(T_{P}\) \((T_{p} \propto n^{2})\), the Planck mass \(m_{P}\) \((m_{P} \propto n^{2})\), the Planck length \(l_{P}\) \((l_{P} \propto n)\) are also proposed using this novel perspective
description: 13 pages
Creating change sophisticated people: a change competencies workbook based on school support staff's perceptions of strategic change in a post '92 higher education institution
Creators: name: Winkler, Tamara Maria
Publisher: name: Cardiff Metropolitan University
Year: 2022
Subjects: Organisational planning and management
Higher education

description: This research critically examines school support staff’s perceptions of strategic change within a post ’92 higher education institution. The need for effective communication as well as valuing and empowering employees during any change process is discussed. The research uses a mixed methods approach. Qualitative and quantitative data are obtained from questionnaires and emerging themes identified. Further qualitative data are gathered from diary logs, interviews and focus groups. This research represents the opinions of school support staff at a particular moment in time within a particular educational context. The results suggest some limitations to the change capabilities of the post ’92 institution, but also some areas of good practice. The production of a change framework and the change competencies workbook provides both the institution and its employees, with an opportunity to explore further the prospect of improving their ability to manage change. Both the framework and the competencies require an environment of trust for them to work effectively. The subject headings of identity, perception and communication are utilised in the change framework and the change competencies. The subject headings were chosen in order to assist the researcher to categorise various data covering areas of concern raised by research participants. This thesis suggests that the post ’92 institution has yet to establish a corporate change policy or embed a continuous change culture within its organisation. This thesis concludes that incorporating the following could assist the institution’s management of change:  create a culture of change by utilising the change framework and implement a corporate change strategy based on Kotter’s (1996) eight steps for change;  create an environment of trust through excellence in two-way communication by promoting Perkins (2008) supportive communication and listening skills;  create empowered and change sophisticated people by improving their change competencies using the workbook and regular targeted staff development.
Subconvexity for Half Integral Weight $L$-functions
Creators: name: Kiral, Eren Mehmet
Publisher: name: arXiv
Year: 2013
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11M36, 11M41, 11F37, 11F72

description: We prove a subconvexity bound in the conductor aspect for $L(s,f,χ)$ where $f$ is a half integer weight modular form. This $L$-function has analytic continuation and functional equation, but no Euler product. Due to the lack of an Euler product, one does not expect a Riemann hypothesis for half integer weight modular forms. Nevertheless one may speculate a Lindelof-type hypothesis, and this current subconvexity result is an indication towards its truth.
description: 33 pages
title: Die Murrhardter Doppelhäuser des 18. Jahrhunderts
Creators: name: Wichmann, Petra
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 21, Nr. 1 (1992), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
GTMDs and the factorization of exclusive double Drell-Yan
Creators: name: Echevarria, Miguel G.
name: Garcia, Patricia A. Gutierrez
name: Scimemi, Ignazio
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Different exclusive processes have been proposed to access the generalized transverse momentum dependent distributions (GTMDs) with no proof of factorization, which allows to rigorously define the GTMDs. Using Soft Collinear Effective Theory we derive for the first time the factorization of the differential cross section for the exclusive double Drell-Yan process for the exclusive double Drell-Yan process pion N to N' gamma* gamma* to N' (l^+l^-)(l^+l^-), for small transverse momenta of the photons in terms of a perturbatively calculable hard factor, GTMDs and light-cone wave functions (LCWFs). We find that the hard factor of the process can be obtained from single inclusive Drell-Yan production so that one can resum logarithms at high orders in QCD. We also discuss the evolution of the GTMDs and the LCWFs.
description: 9 pages, 3 figure. Version accepted for publication
Cavity-based reservoir engineering for Floquet-engineered superconducting circuits
Creators: name: Petiziol, Francesco
name: Eckardt, André
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Considering the example of superconducting circuits, we show how Floquet engineering can be combined with reservoir engineering for the controlled preparation of target states. Floquet engineering refers to the control of a quantum system by means of time-periodic forcing, typically in the high-frequency regime, so that the system is governed effectively by a time-independent Floquet Hamiltonian with novel interesting properties. Reservoir engineering, on the other hand, can be achieved in superconducting circuits by coupling a system of artificial atoms (or qubits) dispersively to pumped leaky cavities, so that the induced dissipation guides the system into a desired target state. It is not obvious that the two approaches can be combined, since reaching the dispersive regime, in which system and cavities exchange excitations only virtually, can be spoiled by driving-induced resonant transitions. However, working in the extended Floquet space and treating both system-cavity coupling as well as driving-induced excitation processes on the same footing perturbatively, we identify regimes, where reservoir engineering of targeted Floquet states is possible and accurately described by an effective time-independent master equation. We successfully benchmark our approach for the preparation of the ground state in a system of interacting bosons subjected to Floquet engineered magnetic fields in different lattice geometries.
description: 5 + 15 pages
Naming Game on Networks: Let Everyone be Both Speaker and Hearer
Creators: name: Gao, Yuan
name: Chen, Guanrong
name: Chan, Rosa H. M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Social and Information Networks (cs.SI)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: To investigate how consensus is reached on a large self-organized peer-to-peer network, we extended the naming game model commonly used in language and communication to Naming Game in Groups (NGG). Differing from other existing naming game models, in NGG, everyone in the population (network) can be both speaker and hearer simultaneously, which resembles in a closer manner to real-life scenarios. Moreover, NGG allows the transmission (communication) of multiple words (opinions) for multiple intra-group consensuses. The communications among indirectly-connected nodes are also enabled in NGG. We simulated and analyzed the consensus process in some typical network topologies, including random-graph networks, small-world networks and scale-free networks, to better understand how global convergence (consensus) could be reached on one common word. The results are interpreted on group negotiation of a peer-to-peer network, which shows that global consensus in the population can be reached more rapidly when more opinions are permitted within each group or when the negotiating groups in the population are larger in size. The novel features and properties introduced by our model have demonstrated its applicability in better investigating general consensus problems on peer-to-peer networks.
description: 11 pages, 6 figures
title: Naturwissenschaften und Archäologische Denkmalpflege (4). Die Geophysik am Landesdenkmalamt im Aufbau
Creators: name: Von Der Osten-Woldenburg, Harald
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 21, Nr. 1 (1992), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Generalized Harnack's inequality for nonhomogeneous elliptic equations
Creators: name: Julin, Vesa
Publisher: name: arXiv
Year: 2013
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35J60, 35B65

description: This paper is concerned with nonlinear elliptic equations in nondivergence form where the operator has a first order drift term which is not Lipschitz continuous. Under this condition the equations are nonhomogeneous and nonnegative solutions do not satisfy the classical Harnack's inequality. This paper presents a new type of generalization of the classical Harnack's inequality for such equations. As a corollary we obtain the optimal Harnack type of estimate for p(x)-harmonic functions which quantifies the strong minimum principle.
Statistics of Galactic-Scale Quasar Pairs at Cosmic Noon
Creators: name: Shen, Yue
name: Hwang, Hsiang-Chih
name: Oguri, Masamune
name: Chen, Nianyi
name: Di Matteo, Tiziana
name: Ni, Yueying
name: Bird, Simeon
name: Zakamska, Nadia
name: Liu, Xin
name: Chen, Yu-Ching
name: Kratter, Kaitlin M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The statistics of galactic-scale quasar pairs can elucidate our understanding of the dynamical evolution of supermassive black hole (SMBH) pairs, the duty cycles of quasar activity in mergers, or even the nature of dark matter, but have been challenging to measure at cosmic noon, the prime epoch of massive galaxy and SMBH formation. Here we measure a double quasar fraction of $\sim 6.2\pm0.5\times 10^{-4}$ integrated over $\sim 0.3-3$ arcsec separations (projected physical separations of $\sim 3-30\,{\rm kpc}$ at $z\sim 2$) in luminous ($L_{\rm bol}>10^{45.8}\,{\rm erg\,s^{-1}}$) unobscured quasars at $1.5
description: 19 pages, 9 figures; submitted to ApJ
Watterson estimators for Next Generation Sequencing: from trios to autopolyploids
Creators: name: Ferretti, Luca
name: Ramos-Onsins, Sebástian E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Genomics (q-bio.GN)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences

description: Several variations of the Watterson estimator of variability for Next Generation Sequencing (NGS) data have been proposed in the literature. We present a unified framework for generalized Watterson estimators based on Maximum Composite Likelihood, which encompasses most of the existing estimators. We propose this class of unbiased estimators as generalized Watterson estimators for a large class of NGS data, including pools and trios. We also discuss the relation with the estimators that have been proposed in the literature and show that they admit two equivalent but seemingly different forms, deriving a set of combinatorial identities as a byproduct. Finally, we give a detailed treatment of Watterson estimators for single or multiple autopolyploid individuals.
description: 25 pages
title: Nachruf auf Georg Sigmund Graf Adelmann von Adelmannsfelden
Creators: name: Gebeßler, August
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 21, Nr. 1 (1992), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Collinear functions for QCD resummations
Creators: name: Catani, Stefano
name: Dhani, Prasanna K.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The singular behaviour of QCD squared amplitudes in the collinear limit is factorized and controlled by splitting kernels with a process-independent structure. We use these kernels to define collinear functions that can be used in QCD resummation formulae of hard-scattering observables. Different collinear functions are obtained by integrating the splitting kernels over different phase-space regions that depend on the hard-scattering observables of interest. The collinear functions depend on an auxiliary vector $n^μ$ that can be either light-like $(n^2=0)$ or time-like $(n^2 > 0)$. In the case of transverse-momentum dependent (TMD) collinear functions, we show that the use of a time-like auxiliary vector avoids the rapidity divergences, which are instead present if $n^2=0$. The perturbative computation of the collinear functions lead to infrared (IR) divergences that can be properly factorized with respect to IR finite functions that embody the logarithmically-enhanced collinear contributions to hard-scattering cross sections. We evaluate various collinear functions and their $n^μ$ dependence at ${\cal O}(α_{\rm S})$. We compute the azimuthal-correlation component of the TMD collinear functions at ${\cal O}(α_{\rm S}^2)$, and we present the results of the ${\cal O}(α_{\rm S}^2)$ contribution of linearly-polarized gluons to transverse-momentum resummation formulae. Beyond ${\cal O}(α_{\rm S}^2)$ the collinear functions of initial-state colliding partons are process dependent, as a consequence of the violation of strict collinear factorization of QCD squared amplitudes.
description: 55 pages; some comments added, results unchanged
title: Die Dienststellen des Landesdenkmalamtes
Creators: name: Redaktion, Die
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 21, Nr. 1 (1992), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Large spin Hall conductivity and excellent hydrogen evolution reaction activity in unconventional PtTe1.75 monolayer
Creators: name: Shao, Dexi
name: Deng, Junze
name: Sheng, Haohao
name: Zhang, Ruihan
name: Weng, Hongming
name: Fang, Zhong
name: Chen, Xing-Qiu
name: Sun, Yan
name: Wang, Zhijun
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Two-dimensional (2D) materials have gained lots of attention due to the potential applications. In this work, we propose that based on first-principles calculations, the (2$\times$2) patterned PtTe$_2$ monolayer with kagome lattice formed by the well-ordered Te vacancy (PtTe$_{1.75}$) hosts large spin Hall conductivity (SHC) and excellent hydrogen evolution reaction (HER) activity. The unconventional nature relies on the $A1@1b$ band representation (BR) of the highest valence band without SOC. The large SHC comes from the Rashba spin-orbit coupling (SOC) in the noncentrosymmetric structure induced by the Te vacancy. Even though it has a metallic SOC band structure, the $\mathbb Z_2$ invariant is well defined due to the existence of the direct band gap and is computed to be nontrivial. The calculated SHC is as large as 1.25$\times 10^3 \frac{\hbar}{e} (Ω~cm)^{-1}$ at the Fermi level ($E_F$). By tuning the chemical potential from $E_F-0.3$ to $E_F+0.3$ eV, it varies rapidly and monotonically from $-1.2\times 10^3$ to 3.1$\times 10^3 \frac{\hbar}{e} (Ω~cm)^{-1}$. In addition, we also find the Te vacancy in the patterned monolayer can induce excellent HER activity. Our results not only offer a new idea to search 2D materials with large SHC, i.e., by introducing inversion-symmetry breaking vacancies in large SOC systems, but also provide a feasible system with tunable SHC (by applying gate voltage) and excellent HER activity.
Analyses of Hydrogen-stripped core-collapse supernovae using MOSFiT and MESA based tools
Creators: name: Aryan, Amar
name: Pandey, Shashi Bhushan
name: Kumar, Amit
name: Gupta, Rahul
name: Ror, Amit kumar
name: Tripathi, Apara
name: Tiwari, Sugriva Nath
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In this work, we employ two publicly available analysis tools to study four hydrogen(H)--stripped core--collapse supernovae (CCSNe) namely, SN 2009jf, iPTF13bvn, SN 2015ap, and SN 2016bau. We use the Modular Open-Source Fitter for Transients ({\tt MOSFiT}) to model the multi band light curves. {\tt MOSFiT} analyses show ejecta masses (log M$_{ej}$) of $0.80_{-0.13}^{+0.18}$ M$_{\odot}$, $0.15_{-0.09}^{+0.13}$ M$_{\odot}$, $0.19_{-0.03}^{+0.03}$ M$_{\odot}$, and $0.19_{+0.02}^{-0.01}$ M$_{\odot}$ for SN 2009jf, iPTF13vn, SN 2015ap, and SN 2016au, respectively. Later, Modules for Experiments in Stellar Astrophysics ({\tt MESA}), is used to construct models of stars from pre-main sequence upto core collapse which serve as the possible progenitors of these H-stripped CCSNe. Based on literature, we model a 12 M$_{\odot}$ ZAMS star as the possible progenitor for iPTF13vn, SN 2015ap, and SN 2016bau while a 20 M$_{\odot}$ ZAMS star is modeled as the possible progenitor for SN 2009jf. Glimpses of stellar engineering and the physical properties of models at various stages of their lifetime have been presented to demonstrate the usefulness of these analysis threads to understand the observed properties of several classes of transients in detail.
description: Accepted for Special Issue of Journal of Astrophysics and Astronomy, 2022, Astrophysical jets and observational facilities: National perspective, 05 -09 April 2021, ARIES Nainital
Influences of past and present relational social processed when entering higher education post 30 years: Experiential accounts of foundation and year one students
Creators: name: Elmi-Glennan, Clare
Publisher: name: Cardiff Metropolitan University
Year: 2022
Subjects: Higher education

description: The Robbins Report (1963) championed the idea that higher education (HE) should be available to all who might benefit. Consequently, fair access and social inclusion have become central to the UK and Welsh Government‘s lifelong learning and widening participation agenda. However, not all policies facilitated this. For example, in 1999, the Labour government set a target that 50 per cent of 18 to 30 year-olds should experience HE by 2010 and commentators, such as Gorard and Rees (2006) and O‘Shea and Stone (2011) suggest that the 18 to 30 target has led to an emphasis upon this age demographic, leaving older learners either ignored in literature or portrayed as problematic and vulnerable. Additionally, within the educational literature there seems to be a limited understanding of the ways in which relational social processes can act as motivations and barriers to learning across the lifespan (Fuller and Heath, 2010). The present study seeks to address these gaps. HE students, aged 30 years and over, were asked to reflect upon the ways in which such processes influenced their initial decisions to participate in HE and continued to influence their actual HE experience. A phenomenological, qualitative approach was employed with six adult learners who were either at the end of their Foundation Year or at the end of Year 1 of degree level study at a HE Institution in South Wales. A ‗bolder‘ design (Smith, Flower & Larkin, 2009) was developed, which combined interpretative phenomenological analysis (IPA) with autodriven photo elicitation (APE). Findings suggested that past and present relational social processes were multifaceted and complex, influencing and shaping each individual‘s decision to participate and their ongoing engagement. Participants likened their HE experience to a journey, leading them from a powerless to powerful state of personal and academic growth and development. This study challenges and expands on current literature regarding traditional motivations and barriers to learning. Furthermore, it highlights that participation in HE takes place at any age and is not reserved for those under the age of 30.
Spin-1/2 XYZ model revisit: general solutions via off-diagonal Bethe ansatz
Creators: name: Cao, Junpeng
name: Cui, Shuai
name: Yang, Wen-Li
name: Shi, Kangjie
name: Wang, Yupeng
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The spin-1/2 XYZ model with both periodic and anti-periodic boundary conditions is studied via the off-diagonal Bethe ansatz method. The exact spectra of the Hamiltonians and the Bethe ansatz equations are derived by constructing the inhomogeneous T-Q relations, which allow us to treat both the even N (the number of lattice sites) and odd N cases simultaneously in an unified approach.
description: 20 pages, 3 tables, published version, numerical check is added
title: Denkmäler "alternativer" Architektur. Eine Aufsatzreihe
Creators: name: Stopfel, Wolfgang
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 21, Nr. 2 (1992), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
"Crisis" and "recovery": essays on dynamics involved in the team learning from setbacks process
Creators: name: Gong, Hao
Publisher: name: No Publisher Supplied
Year: 2023

description: Research demonstrates that setbacks can stimulate team learning, which is central to both team and organization performance. Although existing literature reveals that the team learning process unfolds over time and is dynamic by nature, scant attention has been paid to the temporality and dynamics involved in the process. To address this void, the present dissertation explores the process of setback-elicited team learning and performance change in a multistage and multifaceted framework. Through two empirical studies, I aim to advance knowledge on how and why teams can learn and reap valuable lessons from setbacks. Specifically, the first study reveals the multi-stage process of team learning from setbacks. In this study, I disaggregate the setback-elicited team dynamics into “falling down” and “bouncing back” stages and explore the mechanisms through which teams bounce back from the setback and bolster subsequent growth. Adopting a mixed method approach, I examine the hypothesized model using both longitudinal survey data from 144 “top management teams” in the context of a strategic business simulation and qualitative interview data from 111 team leaders of 35 private companies. Findings from both quantitative and qualitative evidence provide consistent support for the hypotheses: 1) setbacks cause team disruptions at the “falling down” stage, which then triggers team reflexivity, initiating the transition toward the “bouncing-back” stage and leading to an improvement in subsequent team performance. 2) the saliency of setback aggravates team disruptions (i.e., the deterioration of team productive energy, team behavioral integration and team structure) in short range while amplifies the “learning effects” (i.e., changes in team reflexivity and performance) in long range, functioning as a contextual cue. The second study further explores “why some teams sail through the storm and turn setbacks into an opportunity for learning and growth, while others are knocked out in the face of adversity?” Using interview data from 85 teams, I develop a fine-grained framework (i.e., triple-loop learning model) of team reflexivity and shed light on the role of team reflexivity in facilitating team post-setback learning. Given the increasing complexity and uncertainty of the modern business environment where teams inevitably face various adversities, this dissertation concludes by discussing the implications for future research on team learning from setbacks and providing valuable and timely insights for practitioners.
Analytic Modelling of Binary-Single Encounters: Non-Thermal Eccentricity Distribution and Gravitational-Wave Source Formation
Creators: name: Ginat, Yonadav Barry
name: Perets, Hagai
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Chaotic three-body interactions may lead to the formation of gravitational-wave sources. Here, by modelling the encounter as a series of close, non-hierarchical, triple approaches, interspersed with hierarchical phases, in which the system consists of an inner binary and a star that orbits it, we compute the pericentre probability distribution, and thereby the in-spiral probability in any given binary-single encounter. We then consider the indirect influence of binary-single encounters on the population of gravitational-wave sources, by changing the eccentricity distribution of hard binaries in clusters; we calculate this distribution analytically, by requiring that it be invariant under interactions with single stars.
description: Updated to agree with MNRAS version
title: Die Dienststellen des Landesdenkmalamtes
Creators: name: Redaktion, Die
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 21, Nr. 3 (1992), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
$\mathbb{Z}_{2}$ Spin Hopf Insulator: Helical Hinge States and Returning Thouless Pump
Creators: name: Zhu, Penghao
name: Alexandradinata, A.
name: Hughes, Taylor L.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We introduce a time-reversal-symmetric analog of the Hopf insulator that we call a spin Hopf insulator. The spin Hopf insulator harbors nontrivial Kane-Mele $\Z_2$ invariants on its surfaces, and is the first example of a nonmagnetic delicate topological insulator with spin-orbit coupling. We show that the Kane-Mele $\Z_2$ topology on the surface is generically unstable, but can be stabilized by the addition of a composition of the particle hole and spatial inversion symmetry. Such a symmetry not only protects the surface $\Z_2$ invariant, but also protects gapless helical hinge states on the spin Hopf insulator. Furthermore, we show that in the presence of four-fold rotational symmetry, the spin Hopf insulator exhibits a returning Thouless pump, as well as surface states on sharp boundary terminations.
description: 9+4 pages, 6+1 figures
MPEC 2023-V218 : 2023 VP7
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
subject: 2023 VP7

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.
Schnol's theorem and spectral properties of massless Dirac operators with scalar potentials
Creators: name: Schmidt, Karl Michael
name: Umeda, Tomio
Publisher: name: arXiv
Year: 2013
Subjects: subject: Spectral Theory (math.SP)
subject: FOS: Mathematics
subject: 35Q40, 47F05, 81Q10

description: The spectra of massless Dirac operators are of essential interest e.g. for the electronic properties of graphene, but fundamental questions such as the existence of spectral gaps remain open. We show that the eigenvalues of massless Dirac operators with suitable real-valued potentials lie inside small sets easily characterised in terms of properties of the potentials, and we prove a Schnol'-type theorem relating spectral points to polynomial boundedness of solutions of the Dirac equation. Moreover, we show that, under minimal hypotheses which leave the potential essentially unrestrained in large parts of space, the spectrum of the massless Dirac operator covers the whole real line; in particular, this will be the case if the potential is nearly constant in a sequence of regions.
description: 18 pages
On the Brousseau sums $\sum_{i=1}^n i^p F_i$
Creators: name: Dresden, Gregory
Publisher: name: arXiv
Year: 2022
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11B39 (Primary), 11B83, 65Q30

description: We start with new convolution formulas for $F_n - n^p$ involving only the binomial coefficients. Then, we use those to find direct formulas for the sums $\sum_{i=1}^n i^p F_{n-i}$ and $\sum_{i=1}^n i^p F_i$, and we show how our formulas connect to work in earlier papers by Ledin, Brousseau, Zeitlin, Adegoke, Shannon and Ollerton, and Kinlaw, Morris, and Thiagarajan.
description: 17 pages. Currently under review for publication
Characterization of the human mitochondrial helicase, Twinkle with focus on the role of the N-terminal domain
Creators: name: Johnson, Laura C.
Publisher: name: No Publisher Supplied
Year: 2023

description: Twinkle is the essential replicative helicase in unwinding the mitochondrial DNA during replication. Expression level variations and mutations in Twinkle have been linked to perturbations in mtDNA copy number and integrity and identified as the causative agent in several human clinical disease presentations, including various myopathies, certain Parkinsonisms, and ataxias. Twinkle is structurally and sequentially similar to a subset of other replicative proteins from other taxa (DnaB and DnaG in archaea, A. aeolicus and bacteria, E.coli), as primase-helicases in viruses (T7 gp4), in addition to having orthologues spread amongst both plants and animals. These Twinkle helicase relatives display characteristic features largely maintained in human Twinkle with one major difference; the NTD of human Twinkle does not exhibit any enzymatic activities, in contrast to many of the aforementioned relatives whose NTD contains a primase activity that synthesizes replication primers.To determine the purpose of the NTD in human Twinkle, I designed and purified two constructs to represent the isolated N-terminal and C-terminal domains. Here I report the foundational work demonstrating human NTD directly binds ssDNA and compare the enzymatic properties of a novel human Twinkle construct, exclusively containing the residues in the CTD and linker regions compared to the full-length (FL) Twinkle. Insights from the resulting data were applied to propose a ‘doorstop’ model for the NTD’s contribution to Twinkle’s canonical activities. Twinkle’s noncanonical activities are also further explored using these modular domain constructs. The data generated from that comparative analysis is harnessed to generate a model for how Twinkle’s annealing activity may be involved in generating mitochondrial DNA deletions that are a hallmark of mitochondrial disease.
An examination of educational practitioner perspectives towards reintegration in a rural Welsh local authority setting: from Pupil Referral Unit (PRU) to mainstream education
Creators: name: Thomas, David Vittle
Publisher: name: Cardiff Metropolitan University
Year: 2022
Subjects: Educational psychology

description: This study explores the perspectives of education practitioners toward the process of reintegrating pupils (many of whom display Emotional and Behavioural Difficulties), from a Pupil Referral Unit (PRU) to mainstream educational provision in a rural Welsh education authority and, examines the barriers and facilitators that they identified as evident within their individual schools and the catchment areas they serve, with regard to reintegrating pupils and their families. The study locates the process within the geographical context of the education authority to discuss whether there are specific reintegration barriers and facilitators inherent within the rural Welsh setting. Patterns of pupil referral to, and reintegration from, the PRU and mainstream schools were first examined and analysed from 'pupil tracking data' which records and tracks pupils throughout an academic year from their arrival at the PRU. The perspectives of educational practitioners regarding the possible influence of these variables were gathered first through an expert sample postal questionnaire followed by a landscape sample postal questionnaire. Interviews were subsequently conducted with respondents from Primary, Secondary and PRU settings to drill down into specific variables identified as influencing reintegration moves. This study suggests that although there may be generic reintegration barriers and facilitators evident in all settings, there were specific variables inherent within the rural Welsh context which, were largely identified as barriers. For example, a lack of aspiration and narrow world views of many county residents. Educational practitioners across mainstream and alternative settings provided feedback on difficulties inherent within the reintegration process and how these might be overcome to increase the rate of successful reintegration. The results of this study will be fed back into the professional practice community and to the Behaviour Support Service in the county where the research took place.
Transformer-Based Deep Learning Model for Stock Price Prediction: A Case Study on Bangladesh Stock Market
Creators: name: Muhammad, Tashreef
name: Aftab, Anika Bintee
name: Ahsan, Md. Mainul
name: Muhu, Maishameem Meherin
name: Ibrahim, Muhammad
name: Khan, Shahidul Islam
name: Alam, Mohammad Shafiul
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Finance (q-fin.ST)
subject: Machine Learning (cs.LG)
subject: FOS: Economics and business
subject: FOS: Computer and information sciences

description: In modern capital market the price of a stock is often considered to be highly volatile and unpredictable because of various social, financial, political and other dynamic factors. With calculated and thoughtful investment, stock market can ensure a handsome profit with minimal capital investment, while incorrect prediction can easily bring catastrophic financial loss to the investors. This paper introduces the application of a recently introduced machine learning model - the Transformer model, to predict the future price of stocks of Dhaka Stock Exchange (DSE), the leading stock exchange in Bangladesh. The transformer model has been widely leveraged for natural language processing and computer vision tasks, but, to the best of our knowledge, has never been used for stock price prediction task at DSE. Recently the introduction of time2vec encoding to represent the time series features has made it possible to employ the transformer model for the stock price prediction. This paper concentrates on the application of transformer-based model to predict the price movement of eight specific stocks listed in DSE based on their historical daily and weekly data. Our experiments demonstrate promising results and acceptable root mean squared error on most of the stocks.
description: 16 Pages, 14 Figures (including some containing subfigures)
Bringing Simulation and Observation Together to Better Understand the Intergalactic Medium
Creators: name: Egan, Hilary
name: Smith, Britton D.
name: O'Shea, Brian W.
name: Shull, J. Michael
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The methods by which one characterizes the distribution of matter in cosmological simulations is intrinsically different from how one performs the same task observationally. In this paper, we make substantial steps towards comparing simulations and observations of the intergalactic medium (IGM) in a more sensible way. We present a pipeline that generates and fits synthetic QSO absorption spectra using sight lines cast through a cosmological simulation, and simultaneously identifies structure by directly analyzing the variations in HI and OVI number density. We compare synthetic absorption spectra with a less observationally motivated, but more straightforward density threshold-based method for finding absorbers. Our efforts focus on HI and OVI to better characterize the warm/hot intergalactic medium, a subset of the IGM that is challenging to conclusively identify observationally. We find that the two methods trace roughly the same quantities of HI and OVI above observable column density limits, but the synthetic spectra typically identify more substructure in absorbers. We use both methods to characterize HI and OVI absorber properties. We find that both integrated and differential column density distributions from both methods generally agree with observations. The distribution of Doppler parameters between the two methods are similar for Lya and compare reasonably with observational results, but while the two methods agree with each other with OVI systems, they both are systematically different from observations. We find a strong correlation between OVI baryon fraction and OVI column density. We also discuss a possible bimodality in the temperature distribution of the gas traced by OVI.
description: 22 pages, 21 figures. Accepted by The Astrophysical Journal
Low frequency tail of gravitational wave spectra from hydromagnetic turbulence
Creators: name: Sharma, Ramkishor
name: Brandenburg, Axel
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Hydrodynamic and magnetohydrodynamic turbulence in the early Universe can drive gravitational waves (GWs) and imprint their spectrum onto that of GWs, which might still be observable today. We study the production of the GW background from freely decaying magnetohydrodynamic turbulence from helical and nonhelical initial magnetic fields. To understand the produced GW spectra, we develop a simple model on the basis of the evolution of the magnetic stress tensor. We find that the GW spectra obtained in this model reproduce those obtained in numerical simulations if we consider the detailed time evolution of the low-frequency tail of the stress spectrum from numerical simulations. We also show that the shapes of the produced GW frequency spectra are different for helical and nonhelical cases for the same initial magnetic energy spectra. Such differences can help distinguish helical and nonhelical initial magnetic fields from a polarized background of GWs -- especially when the expected circular polarization cannot be detected directly.
description: 12 pages, 12 figures, 3 tables, Accepted for publication in Phys. Rev. D
Strong nonlinear optical response and transient symmetry switching in Type-II Weyl semimetal $β$-WP2
Creators: name: Hu, Tianchen
name: Su, Bo
name: Shi, Liyu
name: Wang, Zixiao
name: Yue, Li
name: Xu, Shuxiang
name: Zhang, Sijie
name: Liu, Qiaomei
name: Wu, Qiong
name: Li, Rongsheng
name: Zhou, Xinyu
name: Yuan, Jiayu
name: Wu, Dong
name: Chen, Zhiguo
name: Dong, Tao
name: Wang, Nanlin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The topological Weyl semimetals with peculiar band structure exhibit novel nonlinear optical enhancement phenomena even for light at optical wavelengths. While many intriguing nonlinear optical effects were constantly uncovered in type-I semimetals, few experimental works focused on basic nonlinear optical properties in type-II Weyl semimetals. Here we perform a fundamental static and time-resolved second harmonic generation (SHG) on the three dimensional Type-II Weyl semimetal candidate $β$-WP$_2$. Although $β$-WP$_2$ exhibits extremely high conductivity and an extraordinarily large mean free path, the second harmonic generation is unscreened by conduction electrons, we observed rather strong SHG response compared to non-topological polar metals and archetypal ferroelectric insulators. Additionally, our time-resolved SHG experiment traces ultrafast symmetry switching and reveals that polar metal $β$-WP$_2$ tends to form inversion symmetric metastable state after photo-excitation. Intense femtosecond laser pulse could optically drive symmetry switching and tune nonlinear optical response on ultrafast timescales although the interlayer coupling of $β$-WP$_2$ is very strong. Our work is illuminating for the polar metal nonlinear optics and potential ultrafast topological optoelectronic applications.
description: 8 pages, 5 figures
Twisted Spin cobordism and positive scalar curvature
Creators: name: Hebestreit, Fabian
name: Joachim, Michael
Publisher: name: arXiv
Year: 2013
Subjects: subject: Algebraic Topology (math.AT)
subject: Differential Geometry (math.DG)
subject: K-Theory and Homology (math.KT)
subject: FOS: Mathematics
subject: 55N20, 55N22, 55P42, 55R70, 53C25

description: We show how a suitably twisted Spin-cobordism spectrum connects to the question of existence of metrics of positive scalar curvature on closed, smooth manifolds by building on fundamental work of Gromov, Lawson, Rosenberg, Stolz and others. We then investigate this parametrised spectrum, compute its $mod~2$-cohomology and generalise the Anderson-Brown-Peterson splitting of the regular Spin-cobordism spectrum to the twisted case. Along the way we also describe the $mod~2$-cohomology of various twisted, connective covers of real K-theory.
description: 61 pages. Reworked exposition following a referee's report, to appear in Journal of Topology
title: Eröffnungsansprache
Creators: name: Brechtken, Rainer
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 22, Nr. 1 (1993), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
title: Nachruf auf Prof. Dr. Helmut Dölke
Creators: name: Schöck, Gustav
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 22, Nr. 1 (1993), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Probing feebly interacting dark matter with monojet searches
Creators: name: Claude, Jérôme
name: Dutra, Maíra
name: Godfrey, Stephen
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Dark matter may consist of feebly interacting massive particles (FIMPs) that never thermalized with the cosmic plasma. Their relic density is achieved via freeze-in for a wide range of masses, significantly expanding the model space that can be tested compared to other production mechanisms. However, testing the tiny couplings required by freeze-in is challenging. We show that FIMPs can be probed by LHC searches for new physics in mono-jet events with large missing energy. We study a $Z'$ portal model in which gluon annihilation produces FIMPs in the early universe and today at colliders. Monojet searches by LHC Run 3 might discover new physics accounted for by FIMPs with mass in the MeV-TeV range.
description: 7 pages, 3 figures. v2: updated figures ensuring a nonthermal Z'; Matches the journal version
Magnetic octupole tensor decomposition and second-order magnetoelectric effect
Creators: name: Urru, Andrea
name: Spaldin, Nicola A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We discuss the second-order magnetoelectric effect, in which a quadratic or bilinear electric field induces a linear magnetization, in terms of the ferroic ordering of magnetic octupoles. We present the decomposition of a general rank-3 tensor into its irreducible spherical tensors, then reduce the decomposition to the specific case of the magnetic octupole tensor, $\mathcal{M}_{ijk} = \int μ_i (\mathbf{r}) r_j r_k d^3 \mathbf{r}$. We use first-principles density functional theory to compute the size of the local magnetic multipoles on the chromium ions in the prototypical magnetoelectric Cr$_2$O$_3$, and show that, in addition to the well established local magnetic dipoles and magnetoelectric multipoles, the magnetic octupoles are non-zero. The magnetic octupoles in Cr$_2$O$_3$ have an anti-ferroic arrangement, so their net second-order magnetoelectric response is zero. Therefore they form a kind of hidden order, which could be revealed as a linear magnetic (antiferromagnetic) response to a non-zone-center (uniform) quadratic electric field.