cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Perylene Diimide: A Versatile Building Block for Complex Molecular Architectures and a Stable Charge Storage Material
Creators: Milton, Margarita
Publisher: name: Columbia University
Year: 2018
Subjects: Chemistry
Materials science
Sustainability
Perylene
Energy storage

description: Properties such as chemical robustness, potential for synthetic tunability, and superior electron-accepting character describe the chromophore perylene-3,4,9,10-tetracarboxylic diimide (PDI) and have enabled its penetration into organic photovoltaics. The ability to extend what is already a large aromatic core allows for synthesis of graphene ribbon PDI oligomers. Functionalization with polar and ionic groups leads to liquid crystalline phases or immense supramolecular architectures. Significantly, PDI dianions can survive in water for two months with no decomposition, an important property for charge storage materials.
      	We realized the potential of PDI as an efficient negative-side material for Redox Flow Batteries (RFBs). The synthetic tunability of PDI allowed for screening of several derivatives with side chains that enhanced solubility in polar solvents. The optimized molecule, PDI[TFSI]2, dissolved in acetonitrile up to 0.5 M. For the positive-side, we synthesized the ferrocene oil [Fc4] in high yield. The large hydrodynamic radii of PDI[TFSI]2 and [Fc4] preclude their ability to cross a size exclusion membrane, which is a cheap alternative to the typical RFB membranes. We show that this cellulose-based membrane can support high voltages in excess of 3 V and extreme temperatures (−20 to 110 °C). We assembled a cell with 0.4 M electron concentration with negligible capacity loss for over 450 cycles (>74 days). Such concentration and stability are among the highest values reported in redox flow batteries with organic electrolytes.
      	Oxidative photocyclizations of PDI onto acenes administer regiochemistry that favors helical products, albeit with a small number of overlapping π-bonded atoms. We achieved an oxidative photocyclization of PDI onto phenanthrene to form the [7]helicenes PPDHa and PPDHb with 20 overlapping π-bonded atoms, as well as a partially planar molecule 5HPP. Higher temperature increases the ratio of PPDHa:5HPP. Calculations reveal that these molecules contain ~20 kcal/mol more strain than planar analogs, and single crystals show bending of the PDI units from their favored planarity. The PPDH molecules display a new electronic transition in their UV-Vis spectra that sets them apart from monomer PDI and other PDI helicenes. Spectroelectrochemical measurements confirm that PPDHb accepts four electrons. Compared to a naphthyl-fused PDI helicene with only 10 overlapping π-bonded atoms, the PPDH molecules have a heightened ability to delocalize the first added electron.
Continuous-time quantum search and time-dependent two-level quantum systems
Creators: name: Cafaro, Carlo
name: Alsing, Paul M.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: It was recently emphasized by Byrnes, Forster, and Tessler [Phys. Rev. Lett. 120, 060501 (2018)] that the continuous-time formulation of Grover's quantum search algorithm can be intuitively understood in terms of Rabi oscillations between the source and the target subspaces. In this work, motivated by this insightful remark and starting from the consideration of a time-independent generalized quantum search Hamiltonian as originally introduced by Bae and Kwon [Phys. Rev. A 66, 012314 (2002)], we present a detailed investigation concerning the physical connection between quantum search Hamiltonians and exactly solvable time-dependent two-level quantum systems. Specifically, we compute in an exact analytical manner the transition probabilities from a source state to a target state in a number of physical scenarios specified by a spin-1/2 particle immersed in an external time-dependent magnetic field. In particular, we analyze both the periodic oscillatory as well as the monotonic temporal behaviors of such transition probabilities and, moreover, explore their analogy with characteristic features of Grover-like and fixed-point quantum search algorithms, respectively. Finally, we discuss from a physics standpoint the connection between the schedule of a search algorithm, in both adiabatic and nonadiabatic quantum mechanical evolutions, and the control fields in a time-dependent driving Hamiltonian.
description: 42 pages, 4 figures, 2 tables
Quantum Transport on KAM Tori
Creators: name: Asch, Joachim
name: Knauf, Andreas
Publisher: name: arXiv
Year: 1998
Subjects: subject: Mathematical Physics (math-ph)
subject: Condensed Matter (cond-mat)
subject: Dynamical Systems (math.DS)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Although quantum tunneling between phase space tori occurs, it is suppressed in the semiclassical limit $\hbar\searrow 0$ for the Schrödinger equation of a particle in $\bR^d$ under the influence of a smooth periodic potential. In particular this implies that the distribution of quantum group velocities near energy $E$ converges to the distribution of the classical asymptotic velocities near $E$, up to a term of the order $\cO(1/\sqrt{E})$.
description: 21 pages
Theoretical analysis of a nearly optimal analog quantum search
Creators: name: Cafaro, Carlo
name: Alsing, Paul M.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We analyze the possibility of modifying the original Farhi-Gutmann Hamiltonian algorithm in order to speed up the procedure for producing a suitably distributed unknown normalized quantum mechanical state. Such a modification is feasible provided only a nearly optimal fidelity is sought. We propose to select the lower bounds of the nearly optimal fidelity values such that their deviations from unit fidelity are less than the minimum error probability characterizing the optimum ambiguous discrimination scheme between the two nonorthogonal quantum states yielding the chosen nearly optimal fidelity values. Departing from the working assumptions of perfect state overlap and uniform distribution of the target state on the unit sphere in N-dimensional complex Hilbert space, we determine that the modified algorithm can indeed outperform the original analog counterpart of a quantum search algorithm. This performance enhancement occurs in terms of speed for a convenient choice of both the ratio E'/E between the energy eigenvalues E' and E of the modified search Hamiltonian and the quantum mechanical overlap x between the source and the target states. Finally, we briefly discuss possible analytical improvements of our investigation together with its potential relevance in practical quantum engineering applications.
description: 26 pages, 5 figures, 1 table
title: Potentilla crantzii (Crantz) Beck ex Fritsch "Goldrausch"
Creators: name: :None
Publisher: name: Universitätsbibliothek
Year: 2012
Subjects: subject: Digitale Pflanzenbilder: Sammlung Dietmar Brandes
subject: 580

description: Digitale Pflanzenbilder: Sammlung Dietmar Brandes
Optimal power and efficiency of single quantum dot heat engines: theory and experiment
Creators: name: Josefsson, Martin
name: Svilans, Artis
name: Linke, Heiner
name: Leijnse, Martin
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Quantum dots (QDs) can serve as near perfect energy filters and are therefore of significant interest for the study of thermoelectric energy conversion close to thermodynamic efficiency limits. Indeed, recent experiments in [Nat. Nano. 13, 920 (2018)] realized a QD heat engine with performance near these limits and in excellent agreement with theoretical predictions. However, these experiments also highlighted a need for more theory to help guide and understand the practical optimization of QD heat engines, in particular regarding the role of tunnel couplings on the performance at maximum power and efficiency for QDs that couple seemingly weakly to electronic reservoirs. Furthermore, these experiments also highlighted the critical role of the external load when optimizing the performance of a QD heat engine in practice. To provide further insight into the operation of these engines we use the Anderson impurity model together with a Master equation approach to perform power and efficiency calculations up to co-tunneling order. This is combined with additional thermoelectric experiments on a QD embedded in a nanowire where the power is measured using two methods. We use the measurements to present an experimental procedure for efficiently finding the external load $R_P$ which should be connected to the engine to optimize power output. Our theoretical estimates of $R_P$ show a good agreement with the experimental results, and we show that second order tunneling processes and non-linear effects have little impact close to maximum power, allowing us to derive a simple analytic expression for $R_P$. In contrast, we find that the electron contribution to the thermoelectric efficiency is significantly reduced by second order tunneling processes, even for rather weak tunnel couplings.
Phase retrieval in the high-dimensional regime
Creators: Bakhshizadeh, Milad
Publisher: name: Columbia University
Year: 2021
Subjects: subject: Statistics
subject: FOS: Mathematics
subject: X-ray crystallography
subject: X-ray diffraction imaging
subject: Astronomical photography
subject: Spectrum analysis

description: The main focus of this thesis is on the phase retrieval problem. This problem has a broad range of applications in advanced imaging systems, such as X-ray crystallography, coherent diffraction imaging, and astrophotography. Thanks to its broad applications and its mathematical elegance and sophistication, phase retrieval has attracted researchers with diverse backgrounds. Formally, phase retrieval is the problem of recovering a signal 𝔁 ∈ ℂⁿ from its phaseless linear measurements of the form |𝛼ᵢ∗𝔁| + 𝜖ᵢ where sensing vectors 𝛼ᵢ, 𝑖 = 1, 2, ..., 𝓶, are in the same vector space as 𝔁 and 𝜖ᵢ denotes the measurement noise. Finding an effective recovery method in a practical setup, analyzing the required sample complexity and convergence rate of a solution, and discussing the optimality of a proposed solution are some of the major mathematical challenges that researchers have tried to address in the last few years. In this thesis, our aim is to shed some light on some of these challenges and propose new ways to improve the imaging systems that have this problem at their core. Toward this goal, we focus on the high-dimensional setting where the ratio of the number of measurements to the ambient dimension of the signal remains bounded. This regime differs from the classical asymptotic regime in which the signal's dimension is fixed and the number of measurements is increasing. We obtain sharp results regarding the performance of the existing algorithms and the algorithms that are introduced in this thesis. To achieve this goal, we first develop a few sharp concentration inequalities. These inequalities enable us to obtain sharp bounds on the performance of our algorithms. We believe such results can be useful for researchers who work in other research areas as well. Second, we study the spectrum of some of the random matrices that play important roles in the phase retrieval problem, and use our tools to study the performance of some of the popular phase retrieval recovery schemes. Finally, we revisit the problem of structured signal recovery from phaseless measurements. We propose an iterative recovery method that can take advantage of any prior knowledge about the signal that is given as a compression code to efficiently solve the problem. We rigorously analyze the performance of our proposed method and provide extensive simulations to demonstrate its state-of-the-art performance.
Taming Chimeras in Networks by Multiplexing Delays
Creators: name: GHOSH, SAPTARSHI
name: Schulen, Leonhard
name: Kachhvah, Ajay Deep
name: Zakharova, Anna
name: Jalan, Sarika
Publisher: name: figshare
Year: 2020
Subjects: Applied Physics

description: Chimera referring to a coexistence of coherent and incoherent states, is traditionally very difficult to control due to its peculiar nature. Here, we provide a recipe to construct chimera states in the multiplex networks with the aid of multiplexing-delays. The chimera state in multiplex networks is produced by introducing heterogeneous delays in a fraction of interlayer links, refered as multiplexing-delay, in a sequence. Additionally, the emergence of the incoherence in the chimera state can be regulated by making appropriate choice of both inter- and intra layer coupling strengths, whereas the extent and the position of the incoherence regime can be regulated by appropriate placing and values of the multiplexing delays. The proposed technique to construct such tailor-made chimera equips us with multiplex network's structural parameters as tools in gaining both qualitative- and quantitative-control over the incoherent section of the chimera states and, in turn, the chimera. Our investigation can be of worth in controlling dynamics of multi-level delayed systems and attain desired chimeric patterns.
Counting States of Black Strings with Traveling Waves II
Creators: name: Horowitz, Gary T.
name: Marolf, Donald
Publisher: name: arXiv
Year: 1996
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We extend our recent analysis of the entropy of extremal black strings with traveling waves. We previously considered waves carrying linear momentum on black strings in six dimensions. Here we study waves carrying angular momentum on these strings, and also waves carrying linear momentum on black strings in five dimensions. In both cases, we show that the horizon remains homogeneous and compute its area. We also count the number of BPS states at weak string coupling with the same distribution of linear and angular momentum, and find complete agreement with the black string entropy.
description: 14 pages
Eulophia horsfallii Summerh.
Creators: name: Zhou, Ya-Dong
name: Mwachala, Geoffrey
name: Hu, Guang-Wan
name: Wang, Qing-Feng
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Asparagales
Orchidaceae
Eulophia
Eulophia horsfallii

description: Eulophia horsfallii (Bateman) Summerh.  —
Habit: Herb.
Habitat: LMWF; up to 2 700 m. Distribution: II.
 Voucher: Thiba Fishing Camp, Alt. 1 850 m, 31 Jul. 1977, Gilbert & Rankin 4810 (EA).
References: Cribb (1989b), Bussmann (1994), Agnew (2013).
description: Published as part of Zhou, Ya-Dong, Mwachala, Geoffrey, Hu, Guang-Wan & Wang, Qing-Feng, 2022, Annotated checklist of the vascular plants of Mount Kenya, East Africa, pp. 1-108 in Phytotaxa 546 (1) on page 26, DOI: 10.11646/phytotaxa.546.1.1, http://zenodo.org/record/6550464
The free energy of compressed lattice knots
Creators: name: van Rensburg, EJ Janse
Publisher: name: arXiv
Year: 2019
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences
subject: 82B41, 92B05

description: A compressed knotted ring polymer in a confining cavity is modelled by a knotted lattice polygon confined in a cube in ${\mathbb Z}^3$. The GAS algorithm [17] is used to sample lattice polygons of fixed knot type in a confining cube and to estimate the free energy of confined lattice knots. Lattice polygons of knot types the unknot, the trefoil knot, and the figure eight knot, are sampled and the free energies are estimated as functions of the concentration of monomers in the confining cube. The data show that the free energy is a function of knot type at low concentrations, and (mean-field) Flory-Huggins theory [12,15] is used to model the free energy as a function of monomer concentration. The Flory interaction parameter of knotted lattice polygons in ${\mathbb Z}^3$ is also estimated.
Magnetic Properties of Short Period InGaMnAs/InGaAs Superlattices
Creators: name: Sadowski, J.
name: Mathieu, R.
name: Svedlindh, P.
name: Kanski, J.
name: Karlsteen, M.
name: Swiatek, K.
name: Domagala, J. Z.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We have observed a paramagnetic-to-ferromagnetic phase transition in short period InGaMnAs/InGaAs superlattices. The thicknesses of magnetic InGaMnAs layers in the structures studied was chosen to be 4 or 8 molecular layers (12 Åor 24 Å). The nonmagnetic InGaAs spacer layers are 12 Åthick. The In content of InGaMnAs and InGaAs layers was chosen in such a way that magnetic layers were: deep potential wells, high potential barriers or shallow potential wells. For superlattices with 8 monolayer thick InGaMnAs magnetic layers and 4 monolayer thick InGaAs nonmagnetic spacers the temperatures of paramagnetic-to-ferromagnetic phase transition do not depend on the band offsets between InGaMnAs and InGaAs adjusted by the In content.
description: Proceedings of the XXXI International School on the Physics of Semiconducting Compounds, Jaszowiec, Poland, June 7-14 (2002)
Instability of an "Approximate Black Hole"
Creators: name: Choptuik, Matthew W.
name: Hirschmann, Eric W.
name: Liebling, Steven
Publisher: name: arXiv
Year: 1997
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate the stability of a family of spherically symmetric static solutions in vacuum Brans-Dicke theory (with $ω=0$) recently described by van Putten. Using linear perturbation theory, we find one exponentially growing mode for every member of the family of solutions, and thus conclude that the solutions are not stable. Using a previously constructed code for spherically symmetric Brans-Dicke, additional evidence for instability is provided by directly evolving the static solutions with perturbations. The full non-linear evolutions also suggest that the solutions are black-hole-threshold critical solutions.
description: 5 pages, REVTeX 3.0, 6 figures included
Phenazine Homeostasis in Pseudomonas aeruginosa Biofilms
Creators: Bendebury, Anastasia
Publisher: name: Columbia University
Year: 2018
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Electrical engineering
subject: Phenazine
subject: Pseudomonas aeruginosa
subject: Biofilms

description: A bacterial biofilm is a community of sessile cells encased in a matrix composed of polysaccharides, proteins, and extracellular DNA that develops according to a reproducible morphogenic program. This morphogenic program is deeply influenced by prevailing redox conditions within the biofilm, which are established by a gradient of terminal electron acceptor through the depth of the biofilm. Terminal electron acceptor limitation leads to redox stress, measured as an elevated ratio of reduced to oxidized forms of the metabolic cofactor nicotinamide adenine dinucleotide, NAD(H). In biofilms of the gram-negative bacterium Pseudomonas aeruginosa, redox stress is relieved by the presence of diffusible redox-cycling molecules, phenazines, that are able to act as an electrical conduit between intracellular NADH and oxygen in the aerobic zone of the biofilm. This is most apparent in the dramatically hyperspread and hyperwrinkled morphologies observed in colony biofilms unable to produce phenazines. However, the ability of phenazines to act as a biologically relevant redox couple between the reducing equivalents of metabolism and atmospheric oxygen also renders them toxic to producing cells. In order to avoid phenazine toxicity, P. aeruginosa encodes self-resistance mechanisms under the control of the redox-sensitive transcription factor SoxR. Two components of the SoxR regulon, the efflux pump MexGHI-OpmD and the monooxygenase PumA, are known to be major contributors to survival in the presence of toxic concentrations of phenazines. This work further details the role of the small protein MexG (Chapter 3) and PumA in phenazine resistance (Chapter 4), and presents an electrochemical platform for studying the effects of a phenazine redox gradient in biofilm morphogenesis (Chapter 5).
Steady streaming flows in viscoelastic liquids
Creators: name: Vishwanathan, Giridar
name: Juarez, Gabriel
Publisher: name: arXiv
Year: 2019
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We discuss experimental investigations on steady streaming flows of dilute and semi-dilute polymer solutions in microfluidic devices. The effect of non-Newtonian behavior on steady streaming for different model fluids is determined by characterizing the evolution of the inner streaming layer as a function of oscillation frequency using particle tracking velocimetry. We find that steady streaming velocity profiles in constant-viscosity elastic liquids are qualitatively similar to those in Newtonian liquids. Steady streaming velocity profiles in elastic liquids with strong shear thinning, however, display two unique features: (i) a non-monotonic evolution of the inner streaming layer with increasing frequency, first growing then decreasing in width, and (ii) a clear asymmetry in the flow profile at high frequencies.
Habenaria altior Rendle
Creators: name: Zhou, Ya-Dong
name: Mwachala, Geoffrey
name: Hu, Guang-Wan
name: Wang, Qing-Feng
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Asparagales
Orchidaceae
Habenaria
Habenaria altior

description: Habenaria altior Rendle  —
Habit: Herb.
Habitat: LMWF, LMDF; 1 700–3 700 m. Distribution: IIIa.
 Voucher: Mount Kenya Safari Club, Alt. 2 438 m, 22 Sep. 1968, Agnew 10729 (EA).
References: Stewart & Campbell (2003).
description: Published as part of Zhou, Ya-Dong, Mwachala, Geoffrey, Hu, Guang-Wan & Wang, Qing-Feng, 2022, Annotated checklist of the vascular plants of Mount Kenya, East Africa, pp. 1-108 in Phytotaxa 546 (1) on page 26, DOI: 10.11646/phytotaxa.546.1.1, http://zenodo.org/record/6550464
Islamic civilization in Abbasid era: A study and criticism
Creators: name: Bakhtiari, Shahla
Publisher: name: figshare
Year: 2020
Subjects: History

description: For modern researchers, various books and texts open a gate to the knowledge about ancient consequences of civilizations. Criticism, however, not only unfolds the facts and characteristics of the text body as well as examining the capability of the compiler or translator, it also recognizes different domains from intellectual facilities to the type of writing and translation. Finding the strength and weakness points of the book, “Islamic Civilization in Abbasid Era”, from compilation and translation perspective, the compiler and translator seem to have keenly been motivated to present the consequences of civilization in Abbasid era, an effort in which they could successfully fulfill the aim.
The study shows that the strength points are positively more than weaknesses. Having Shariah- based approach, the compiler has been capable to propose the consequences of Islamic civilization from various domains. The translator, in turn, has not only strived to fill a gap in Persian works by selecting such book, he also succeeds to deliver an appropriate material to the students with a very little imperfection in translation.
Action principle and weak invariants
Creators: name: Abe, Sumiyoshi
name: Ou, Congjie
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: A weak invariant associated with a master equation is characterized in such a way that its spectrum is not constant in time but its expectation value is conserved under time evolution generated by the master equation. Here, an intriguing relationship between the concept of weak invariants and the action principle for master equations based on the auxiliary operator formalism is revealed. It is shown that the auxiliary operator can be thought of as a weak invariant.
description: 7 pages, no figures. Published version
Galeruca Geoffroy 1762
Creators: name: Viswajyothi, Keezhpattillam
name: Clark, Shawn M.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Chrysomelidae
Galeruca

description: Genus Galeruca Geoffroy, 1762
Galeruca Geoffroy, 1762: 251.
description: Published as part of Viswajyothi, Keezhpattillam & Clark, Shawn M., 2022, New World genera of Galerucinae Latreille, 1802 (tribes Galerucini Latreille, 1802, Metacyclini Chapuis, 1875, and Luperini Gistel, 1848): an annotated list and identification key (Coleoptera: Chrysomelidae), pp. 1-102 in European Journal of Taxonomy 842 on page 13, DOI: 10.5852/ejt.2022.842.1945, http://zenodo.org/record/7222499
Supplementary information from Improved forecasts of influenza-associated hospitalization rates with Google Search Trends
Creators: name: Sasikiran Kandula
name: Pei, Sen
name: Shaman, Jeffrey
Publisher: name: The Royal Society
Year: 2019
Subjects: Computational Biology

description: Reliable forecasts of influenza-associated hospitalizations during seasonal outbreaks can help health systems better prepare for patient surges. Within the USA, public health surveillance systems collect and distribute near real-time weekly hospitalization rates, a key observational metric that makes real-time forecast of this outcome possible. In this paper, we describe a method to forecast hospitalization rates using a population level transmission model in combination with a data assimilation technique. Using this method, we generated retrospective forecasts of hospitalization rates for 5 age groups and the overall population during 5 seasons in the USA and quantified forecast accuracy for both near-term and seasonal targets. Additionally, we describe methods to correct for under-reporting of hospitalization rates (backcast) and to estimate hospitalization rates from publicly available online search trends data (nowcast). Forecasts based on surveillance rates alone were reasonably accurate in predicting peak hospitalization rates (within ± 25% of the actual peak rate, three weeks before peak). The error in predicting rates one to four weeks ahead, remained constant for the duration of the seasons, even during periods of increased influenza incidence. An improvement in forecast quality across all age groups, seasons and targets was observed when backcasts and nowcasts supplemented surveillance data. These results suggest that the model-inference framework can provide reasonably accurate real-time forecasts of influenza hospitalizations; backcasts and nowcasts offer a way to improve system tolerance to observational errors.
Diamagnetism of metallic nanoparticles as the result of strong spin-orbit interaction
Creators: name: Murzaliev, B.
name: Titov, M.
name: Katsnelson, M. I.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The magnetic susceptibility of an ensemble of clean metallic nanoparticles is shown to change from paramagnetic to diamagnetic one with the onset of spin-orbit interaction. The effect is quantified on the basis of symmetry analysis with the help of the random matrix theory. In particular, the magnetic susceptibility is investigated as the function of symmetry breaking parameter representing magnetic flux in the crossover from symplectic to unitary and from orthogonal to unitary ensembles. Corresponding analytical and numerical results provide a qualitative explanation to the experimental data on diamagnetism of an ensemble of gold nanorods.
description: 6 pages, 5 figures; extended version
Regional prices reconsidered
Creators: name: Hearne, David
name: Bailey, David
Publisher: name: Taylor & Francis
Year: 2025
Subjects: subject: Sociology
subject: FOS: Sociology
subject: Information Systems not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Cancer
subject: Science Policy

description: Purchasing power parities are widely used in cross-country international comparisons of macroeconomic aggregates. Despite their importance, there is much less information about how prices differ across regions within countries. This paper contributes to a growing body of literature seeking to fill this gap by combining consumer price index (CPI) microdata and a variety of other data sources to develop more detailed price measures than has hitherto been possible. Using these, the paper then estimates relative price levels for nomenclature of territorial units of statistics (NUTS)-2 UK sub-regions using a random coefficient regression model. The results provide some empirical evidence against which to assess theoretical models in the literature.
Habenaria attenuata Hook. f.
Creators: name: Zhou, Ya-Dong
name: Mwachala, Geoffrey
name: Hu, Guang-Wan
name: Wang, Qing-Feng
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Asparagales
Orchidaceae
Habenaria
Habenaria attenuata

description: Habenaria attenuata Hook.f.  —
Habit: Herb.
Habitat: LMWF, BZ, UMF, HZ, AZ; 2 300–4 000 m. Distribution: II.
 Voucher: Naru Moru Track, Alt. 3 174 m, 24 Jul. 2014, SAJIT 002111 (HIB).
References: Blundell (1987), Cribb (1989a), Agnew (2013).
description: Published as part of Zhou, Ya-Dong, Mwachala, Geoffrey, Hu, Guang-Wan & Wang, Qing-Feng, 2022, Annotated checklist of the vascular plants of Mount Kenya, East Africa, pp. 1-108 in Phytotaxa 546 (1) on page 26, DOI: 10.11646/phytotaxa.546.1.1, http://zenodo.org/record/6550464
Habenaria bracteosa A. Rich.
Creators: name: Zhou, Ya-Dong
name: Mwachala, Geoffrey
name: Hu, Guang-Wan
name: Wang, Qing-Feng
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Asparagales
Orchidaceae
Habenaria
Habenaria bracteosa

description: Habenaria bracteosa Hochst. ex A.Rich.  —
Habit: Herb.
Habitat: LMWF, BZ, UMF, HZ; 2 000–4 000 m. Distribution: II.
 Voucher: Naro Moru Track, Alt. 2 546 m, 23 Jul. 2014, SAJIT 002082 (HIB).
 References: Fries et al. (1924a), Blundell (1987), Cribb (1989a), Agnew (2013).
description: Published as part of Zhou, Ya-Dong, Mwachala, Geoffrey, Hu, Guang-Wan & Wang, Qing-Feng, 2022, Annotated checklist of the vascular plants of Mount Kenya, East Africa, pp. 1-108 in Phytotaxa 546 (1) on page 26, DOI: 10.11646/phytotaxa.546.1.1, http://zenodo.org/record/6550464
Exact Physical Black Hole States in Generic 2-D Dilaton Gravity
Creators: name: Barvinsky, A.
name: Kunstatter, G.
Publisher: name: arXiv
Year: 1996
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The quantum mechanics of black holes in generic 2-D dilaton gravity is considered. The Hamiltonian surface terms are derived for boundary conditions corresponding to an eternal black hole with slices on the interior ending on the horizon bifurcation point. The quantum Dirac constraints are solved exactly for these boundary conditions to yield physical eigenstates of the energy operator. The solutions are obtained in terms of geometrical phase space variables that were originally used by Cangemi, Jackiw and Zwiebach in the context of string inspired dilaton gravity. The spectrum is continuous in the Lorentzian sector, but in the Euclidean sector the thermodynamic entropy must be $2πn/G$ where $n$ is an integer. The general class of models considered contains as special cases string inspired dilaton gravity, Jackiw-Teitelboim gravity and spherically symmetry gravity.
description: 11 pages, Revtex
title: Potentilla incana Gaertn., B. Mey. & Scherb.
Creators: name: :None
Publisher: name: Universitätsbibliothek
Year: 2012
Subjects: subject: Digitale Pflanzenbilder: Sammlung Dietmar Brandes
subject: 580

description: Digitale Pflanzenbilder: Sammlung Dietmar Brandes
Review of 2010 financial security at Equity Silver mine
Creators: name: Price, W.A.
name: Aziz, M.
name: Bellefontaine, K.
Publisher: name: The University of British Columbia
Year: 2012

description: The Equity Silver Mine operated between 1980 and 1994, producing silver, gold, and copper from three open pits and a small underground operation. Future liability is important at the site due to the environmental risk and high cost of treating acid rock drainage (ARD) produced by waste rock. As a condition of the Mines Act permit, British Columbia requires the provision of financial security. Security reviews have been held every five years since 1991. This paper outlines conclusions of the 2010 review and trends in costs over time.
Cosmology in cubic and $f(P)$ gravity
Creators: name: Erices, Cristian
name: Papantonopoulos, Eleftherios
name: Saridakis, Emmanuel N.
Publisher: name: arXiv
Year: 2019
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct cubic gravity and its $f(P)$ extension and we investigate their early- and late-time cosmological applications. Cubic gravity is based on a particular invariant $P$, constructed from cubic contractions of the Riemann tensor, under three requirements: (i) the resulting theory possesses a spectrum identical to that of general relativity, (ii) it is neither topological nor trivial in four dimensions, and (iii) it is defined such that it is independent of the dimensions. Relaxing the last condition and restricting the parameters of cubic gravity we can obtain second-order field equations in a cosmological background. We show that at early times one can obtain inflationary, de Sitter solutions, which are driven by an effective cosmological constant constructed purely from the cubic terms of the simple cubic or $f(P)$ gravity. Concerning late-time evolution, the new terms constitute an effective dark-energy sector and we show that the Universe experiences the usual thermal history and the onset of late-time acceleration. In the case of $f(P)$ gravity, depending on the choice of parameters, we find that the dark-energy equation-of-state parameter can be quintessencelike, phantomlike or it can experience the phantom-divide crossing during the evolution, even if an explicit cosmological constant is absent.
description: 10 pages, 3 figures
Solutions of arbitrary topology in 1+1 gravity
Creators: name: Kloesch, Thomas
Publisher: name: arXiv
Year: 1997
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present a classification of all global solutions for generalized 2D dilaton gravity models (with Lorentzian signature). While for some of the popular choices of potential-like terms in the Lagrangian, describing, e.g., string inspired dilaton gravity or spherically reduced gravity, the possible topologies of the resulting spacetimes are restricted severely, we find that for generic choices of these `potentials' there exist maximally extended solutions to the field equations on all non-compact two-surfaces.
description: 4 pages, LaTex, 5 eps-figures; contribution to the 2nd Conference on Constrained Dynamics and Quantum Gravity, Santa Margherita Ligure, September 1996
Phenomenal Woman:  Women's Workplace Identity Development and Meaning Making Through Storytelling
Creators: Brito, Aurora M.
Publisher: name: Columbia University
Year: 2020
Subjects: Adult education
Women's studies
Organizational behavior
Women graduate students
Storytelling in education
Theater--Study and teaching (Higher)
Discrimination in higher education
Racism in higher education
Diversity in higher education
Homophobia

description: This case study examined women’s identity development in the workplace through the application of storytelling as a learning technique. Study participants included twenty-two women graduates and 2nd year students of diverse backgrounds ranging in ages 25 to 71 from a master’s degree applied theatre program in a Northeastern university. This study describes identity development through ways in which women make meaning of their lived experience and perceived interactions in the workplace. Data collection derived from 22 semi-structured interviews. Deeper data analysis surfaced through dramaturgical coding. Three analytical categories emerged: 1) Generations, 2) Race and 3) Sexual Orientation. The findings exposed power and positionality barriers as obstacles and challenges that undermine women’s careers. Three conclusions emerged: 1) Women continue to struggle with barriers that pose as obstacles and challenges to their learning and identity development in the workplace, 2) Women of color experience the double bind barriers of racism and sexism and 3) Women learn through storytelling and sharing workplace stories. This study privileges storytelling, a form of presentational knowing, as a legitimate way of knowing and has been shown to be conducive to learning and identity development. Women’s perspectives changed through theatre techniques using critical reflection and action; they engaged in communities of practice that offered supportive structures. Also, there continues to be resistance to hard conversations around race and inequality. Diversity programs that build upon Paulo Freire’s praxis of reflection and action hold leaders who espouse diversity initiatives to account. To avoid the paradox of diversity, human resources diversity training, organizational learning, professional development and community based social programs can leverage the power of storytelling. Affective empathy as an embodied component of storytelling establishes empathic connections between dominant culture and the marginalized. Critical and constructive development theories need to be embedded into curriculum to address systemic racism. Presentational knowing is an effective tool for social action and social justice by broadening learning beyond adult education to encourage empathy between people whose views are different. This qualitative study is grounded in critical theory, John Heron’s (1992) Presentational knowing, theories of identity and constructive development.
Tracking spatio-temporal energy vulnerability: A composite indicator for England and Wales
Creators: name: Ward, Cameron
name: Singleton, Alexander
name: Robinson, Caitlin
name: Rowe, Francisco
Publisher: name: Taylor & Francis
Year: 2025
Subjects: subject: Physical Sciences not elsewhere classified
subject: Medicine
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified

description: Energy vulnerability concerns a household that is unable to access a socially and materially necessitated level of energy service. The government’s fuel poverty metric which concerns fuel affordability and energy efficiency does not capture the broader range of factors that drive energy vulnerability within households. Research has addressed this gap by creating spatial composite indicators using a greater array of known drivers. However, the studies that observe the temporality of energy vulnerability are in short supply. This prevents the monitoring of progress and the identification of areas with entrenched energy vulnerability. A temporal consideration is critical as the associated household physical and mental health implications from energy vulnerability are known to compound over time. This study addresses the gap by constructing the first spatial energy vulnerability composite indicator for England and Wales that is temporally comparable. Utilising dwelling and socio-economic measures, we calculate energy vulnerability risk in small areas for both 2011 and 2021. The findings reveal substantial geographic variation in energy vulnerability, with a total of 5,530 small areas identified to be in entrenched energy vulnerability across the analysis period. We strongly advocate for targeted policies to be situated within both areas of continued and increasing energy vulnerability to raise living standards.
title: Правовое обеспечение землеустройства и кадастров
title: Учебник для бакалавров
titleType: Subtitle
Creators: name: Липски С.А.
Publisher: name: Ай Пи Ар Медиа
Year: 2020

description: В учебнике дана общая характеристика правового регулирования земельных отношений; раскрыты вопросы, связанные с правами на землю, их реализацией и защитой, разрешением земельных споров, привлечением к ответственности за земельные правонарушения. Освещены правовые аспекты охраны земель, образования земельных участков, государственного управления земельным фондом и государственного земельного надзора; особенности правового режима отдельных категорий земель. Также дана характеристика законодательного обеспечения землеустройства, кадастровой деятельности, кадастрового учета объектов недвижимости и регистрации прав на них. Изучение изложенного в учебнике материала позволит овладеть компетенциями, предусмотренными соответствующим образовательным стандартом, и сформировать у обучающихся системное восприятие правового обеспечения землеустройства и кадастров. Подготовлен в соответствии с Федеральным государственным образовательным стандартом высшего образования. Учебник предназначен для студентов, обучающихся по направлению подготовки 21.03.02 «Землеустройство и кадастры», изучающих дисциплину «Правовое обеспечение землеустройства и кадастров», а также будет полезен специалистам в области земельных отношений.
Monotonicity with Volume of Entropy and of Mean Entropy for Translationally Invariant Systems as Consequences of Strong Subadditivity
Creators: name: Kay, Amanda R.
name: Kay, Bernard S.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Mathematical Physics (math-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider some questions concerning the monotonicity properties of entropy and mean entropy of states on translationally invariant systems (classical lattice, quantum lattice and quantum continuous). By taking the property of strong subadditivity, which for quantum systems was proven rather late in the historical development, as one of four primary axioms (the other three being simply positivity, subadditivity and translational invariance) we are able to obtain results, some new, some proved in a new way, which appear to complement in an interesting way results proved around thirty years ago on limiting mean entropy and related questions. In particular, we prove that as the sizes of boxes in Z^n or R^n increase in the sense of set inclusion, (1) their mean entropy decreases monotonically and (2) their entropy increases monotonically. Our proof of (2) uses the notion of "m-point correlation entropies" which we introduce and which generalize the notion of "index of correlation" (see e.g. R. Horodecki, Phys. Lett. A 187 p145 1994). We mention a number of further results and questions concerning monotonicity of mean entropy for more general shapes than boxes and for more general translationally invariant (/homogeneous) lattices and spaces than Z^n or R^n.
description: 17 pages, LaTeX, uses amsmath, amsfonts, latexsym, amssymb and amsthm usepackages; 2 LaTeX figures, uses curves usepackage. Submitted to "Journal of Mathematical Physics"
Habenaria cornuta Lindl.
Creators: name: Zhou, Ya-Dong
name: Mwachala, Geoffrey
name: Hu, Guang-Wan
name: Wang, Qing-Feng
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Asparagales
Orchidaceae
Habenaria
Habenaria cornuta

description: Habenaria cornuta Lindl.  —
Habit: Herb.
Habitat: LMDF; up to 2 400 m. Distribution: II.
Voucher: N/A.
 Reference: Fries et al. (1924a).
description: Published as part of Zhou, Ya-Dong, Mwachala, Geoffrey, Hu, Guang-Wan & Wang, Qing-Feng, 2022, Annotated checklist of the vascular plants of Mount Kenya, East Africa, pp. 1-108 in Phytotaxa 546 (1) on page 26, DOI: 10.11646/phytotaxa.546.1.1, http://zenodo.org/record/6550464
An Introduction to hpxMP: A Modern OpenMP Implementation Leveraging HPX, An Asynchronous Many-Task System
Creators: name: Zhang, Tianyi
name: Shirzad, Shahrzad
name: Diehl, Patrick
name: Tohid, R.
name: Wei, Weile
name: Kaiser, Hartmut
Publisher: name: arXiv
Year: 2019
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: Asynchronous Many-task (AMT) runtime systems have gained increasing acceptance in the HPC community due to the performance improvements offered by fine-grained tasking runtime systems. At the same time, C++ standardization efforts are focused on creating higher-level interfaces able to replace OpenMP or OpenACC in modern C++ codes. These higher level functions have been adopted in standards conforming runtime systems such as HPX, giving users the ability to simply utilize fork-join parallelism in their own codes. Despite innovations in runtime systems and standardization efforts users face enormous challenges porting legacy applications. Not only must users port their own codes, but often users rely on highly optimized libraries such as BLAS and LAPACK which use OpenMP for parallization. Current efforts to create smooth migration paths have struggled with these challenges, especially as the threading systems of AMT libraries often compete with the treading system of OpenMP. To overcome these issues, our team has developed hpxMP, an implementation of the OpenMP standard, which utilizes the underlying AMT system to schedule and manage tasks. This approach leverages the C++ interfaces exposed by HPX and allows users to execute their applications on an AMT system without changing their code. In this work, we compare hpxMP with Clang's OpenMP library with four linear algebra benchmarks of the Blaze C++ library. While hpxMP is often not able to reach the same performance, we demonstrate viability for providing a smooth migration for applications but have to be extended to benefit from a more general task based programming model.
Special complex manifolds
Creators: name: Alekseevsky, D. V.
name: Cortés, V.
name: Devchand, C.
Publisher: name: arXiv
Year: 1999
Subjects: subject: Differential Geometry (math.DG)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 53C30

description: We introduce the notion of a special complex manifold: a complex manifold (M,J) with a flat torsionfree connection \nabla such that (\nabla J) is symmetric. A special symplectic manifold is then defined as a special complex manifold together with a \nabla-parallel symplectic form ω. This generalises Freed's definition of (affine) special Kähler manifolds. We also define projective versions of all these geometries. Our main result is an extrinsic realisation of all simply connected (affine or projective) special complex, symplectic and Kähler manifolds. We prove that the above three types of special geometry are completely solvable, in the sense that they are locally defined by free holomorphic data. In fact, any special complex manifold is locally realised as the image of a holomorphic 1-form α: C^n \to T^* C^n. Such a realisation induces a canonical \nabla-parallel symplectic structure on M and any special symplectic manifold is locally obtained this way. Special Kähler manifolds are realised as complex Lagrangian submanifolds and correspond to closed forms α. Finally, we discuss the natural geometric structures on the cotangent bundle of a special symplectic manifold, which generalise the hyper-Kähler structure on the cotangent bundle of a special Kähler manifold.
description: 24 pages, latex, section 3 revised (v2), modified Abstract and Introduction, version to appear in J. Geom. Phys