cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Microstructural and compositional design principles for Mo-V-Nb-Ti-Zr multi-principal element alloys: a high-throughput first-principles study
Creators: name: Leong, Zhidong
name: Ramamurty, Upadrasta
name: Tan, Teck Leong
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Due to the vast compositional space of multi-principal element alloys (MPEAs), the rational design of MPEAs for optimized microstructures is difficult. Therefore, a high-throughput first-principles study of Mo-V-Nb-Ti-Zr, a refractory MPEA, was conducted to gain insights into the underlying microstructures. Using Monte-Carlo simulations powered by cluster expansion, we uncover the principles governing the MPEA's microstructures across a large compositional space that includes non-equiatomic compositions and encompasses the constituent binaries, ternaries, and quaternaries. In the spirit of Hume-Rothery rules for complete solid solubility, we present a quantitative expression for predicting solid solution formation from the composition. Within a consistent framework, our results reproduce the microstructural observations (solid solution vs. segregation) from numerous experiments and provide microstructural predictions for unexplored regions in the compositional space. Our work illuminates the MPEA's microstructures in terms of the separation and clustering tendencies of the elements, presenting a set of simple but powerful design principles for future experiments to rationally design MPEAs with the desired microstructures for superior mechanical properties.
description: 13 pages, 10 figures. Accepted by Acta Materialia
Orbital and Spin Excitations in Cobalt Oxide
Creators: name: Yamani, Z.
name: Buyers, W. J. L.
name: Cowley, R. A.
name: Prabhakaran, D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: By means of neutron scattering we have determined new branches of magnetic excitations in orbitally active CoO (TN=290 K) up to 15 THz and for temperatures from 6 K to 450 K. Data were taken in the (111) direction in six single-crystal zones. From the dependence on temperature and Q we have identified several branches of magnetic excitation. We describe a model for the coupled orbital and spin states of Co2+ subject to a crystal field and tetragonal distortion.
description: To be published in Physica B (Proceedings of SCES07 conference in Houston)
Transformation Optics and the Geometry of Light
Creators: name: Leonhardt, Ulf
name: Philbin, Thomas G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Optics (physics.optics)
subject: Materials Science (cond-mat.mtrl-sci)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Metamaterials are beginning to transform optics and microwave technology thanks to their versatile properties that, in many cases, can be tailored according to practical needs and desires. Although metamaterials are surely not the answer to all engineering problems, they have inspired a series of significant technological developments and also some imaginative research, because they invite researchers and inventors to dream. Imagine there were no practical limits on the electromagnetic properties of materials. What is possible? And what is not? If there are no practical limits, what are the fundamental limits? Such questions inspire taking a fresh look at the foundations of optics and at connections between optics and other areas of physics. In this article we discuss such a connection, the relationship between optics and general relativity, or, expressed more precisely, between geometrical ideas normally applied in general relativity and the propagation of light, or electromagnetic waves in general, in materials. We also discuss how this connection is applied: in invisibility devices, perfect lenses, the optical Aharonov-Bohm effect of vortices and in analogues of the event horizon.
description: 72 pages, 18 figures, preprint with low-resolution images. Introduction to transformation optics, to appear in Progress in Optics (edited by Emil Wolf)
Impact of Front-End Maintenance/Upgrades on ALMA Operation
Creators: name: Siringo, Giorgio
Publisher: name: Zenodo
Year: 2019

description: The ALMA Front-End (FE) can host up to 10 receivers, cooled down in the same cryostat and operated through common electronics, the ALMA FE is therefore a single point of failure for an ALMA antenna element (AE). We have in total 66 AEs and 70 FEs: only 4 spares are available in the FE lab to compensate not only for individual FE problems but also for more critical, larger scale issues that can potentially affect simultaneously more than 4 units. FE maintenance done at the OSF (cryogenics, receivers, IF, M&C, integration, verification,...) has therefore a direct impact on the number of antennas available for science at the AOS. Improving the efficiency of that process would consequently improve the efficiency of ALMA science operations.
Luca Malavasi, David Lynch. Mulholland Drive. Torino. Lindau. 2008. pp. 240. ISBN 978-88-7180-718-8
Creators: name: Pavesi, Diletta
Publisher: name: Annali Online  Lettere - Ferrara
Year: 2012

description: Annali Online  Lettere - Ferrara, III 1 (2008)
Martina Niedhammer, Nur eine „Geld-Emancipation“? Loyalitäten und Lebenswelten des Prager jüdischen Großbürgertums 1800-1867
Creators: name: Munke, Martin
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2014

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 63 Nr. 4 (2014)
Information processing at the speed of light
Creators: name: AbuGhanem, M.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: In recent years, quantum computing has made significant strides, particularly in light-based technology. The introduction of quantum photonic chips has ushered in an era marked by scalability, stability, and cost-effectiveness, paving the way for innovative possibilities within compact footprints. This article provides a comprehensive exploration of photonic quantum computing, covering key aspects such as encoding information in photons, the merits of photonic qubits, and essential photonic device components including light squeezers, quantum light sources, interferometers, photodetectors, and waveguides. The article also examines photonic quantum communication and internet, and its implications for secure systems, detailing implementations such as quantum key distribution and long-distance communication. Emerging trends in quantum communication and essential reconfigurable elements for advancing photonic quantum internet are discussed. The review further navigates the path towards establishing scalable and fault-tolerant photonic quantum computers, highlighting quantum computational advantages achieved using photons. Additionally, the discussion extends to programmable photonic circuits, integrated photonics and transformative applications. Lastly, the review addresses prospects, implications, and challenges in photonic quantum computing, offering valuable insights into current advancements and promising future directions in this technology.
Sensing force and charge at the nanoscale with a single-molecule tether
Creators: name: Meng, Xuanhui
name: Kukura, Philipp
name: Faez, Sanli
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Measuring the electrophoretic mobility of molecules is a powerful experimental approach for investigating biomolecular processes. A frequent challenge in the context of single-particle measurements is throughput, limiting the obtainable statistics. Here, we present a molecular force sensor and charge detector based on parallelised imaging and tracking of tethered double-stranded DNA functionalised with charged nanoparticles interacting with an externally applied electric field. Tracking the position of the tethered particle with simultaneous nanometre precision and microsecond temporal resolution allows us to detect and quantify electrophoretic forces down to the sub-piconewton scale. Furthermore, we demonstrate that this approach is capable of detecting changes to the particle charge state, as induced by the addition of charged biomolecules or changes to pH. Our approach provides an alternative route to studying structural and charge dynamics at the single-molecule level.
description: 23 pages, 7 figures
Instability of spatial patterns and its ambiguous impact on species diversity
Creators: name: Reichenbach, Tobias
name: Frey, Erwin
Publisher: name: arXiv
Year: 2008
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Self-arrangement of individuals into spatial patterns often accompanies and promotes species diversity in ecological systems. Here, we investigate pattern formation arising from cyclic dominance of three species, operating near a bifurcation point. In its vicinity, an Eckhaus instability occurs, leading to convectively unstable "blurred" patterns. At the bifurcation point, stochastic effects dominate and induce counterintuitive effects on diversity: Large patterns, emerging for medium values of individuals' mobility, lead to rapid species extinction, while small patterns (low mobility) promote diversity, and high mobilities render spatial structures irrelevant. We provide a quantitative analysis of these phenomena, employing a complex Ginzburg-Landau equation.
description: 4 pages, 3 figures and supplementary information. To appear in Phys. Rev. Lett.
Miklós Lojkó (Hrsg.), Hungary’s Long Nineteenth Century. Constitutional and Democratic Traditions in a European Perspective
Creators: name: Deák, Ágnes
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2014

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 63 Nr. 2 (2014)
Bryobia Koch
Creators: name: Toroitich, Faith J.
name: Ueckermann, Edward A.
name: Theron, Pieter D.
name: Knapp, Markus
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Prostigmata
Tetranychidae
Bryobia

description: Bryobia Koch (Bryobiinae: Bryobiini)
 Adult members of Bryobia have 4 pairs of setae on the prodorsum, first two pairs set on prominent prodorsal lobes; 12 pairs of setae are located on the opisthosoma; fourth pair of dorsocentral setae (f1) marginal; peritreme ends either simply or in anastomosis. Empodia on tarsi pad-like and with tenent hairs.
description: Published as part of Toroitich, Faith J., Ueckermann, Edward A., Theron, Pieter D. & Knapp, Markus, 2009, The tetranychid mites (Acari: Tetranychidae) of Kenya and a redescription of the species Peltanobia erasmusi Meyer (Acari: Tetranychidae) based on males, pp. 33-47 in Zootaxa 2176 on page 34, DOI: 10.5281/zenodo.189364
Asteroseismology of red giants: photometric observations of Arcturus by SMEI
Creators: name: Tarrant, N. J.
name: Chaplin, W. J.
name: Elsworth, Y.
name: Spreckley, S. A.
name: Stevens, I. R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present new results on oscillations of the K1.5 III giant Arcturus (alpha Boo), from analysis of just over 2.5 yr of precise photometric observations made by the Solar Mass Ejection Imager (SMEI) on board the Coriolis satellite. A strong mode of oscillation is uncovered by the analysis, having frequency 3.51+/-0.03 micro-Hertz. By fitting its mode peak, we are able offer a highly constrained direct estimate of the damping time (tau = 24+/-1 days). The data also hint at the possible presence of several radial-mode overtones, and maybe some non-radial modes. We are also able to measure the properties of the granulation on the star, with the characteristic timescale for the granulation estimated to be 0.50+/-0.05 days.
description: 6 pages, 5 figures; accepted for publication in MNRAS Letters
I Dialoghi degli dèi di Luciano: il racconto mitico tra passato e futuro
Creators: name: Dolcetti, Paola
Publisher: name: Annali Online  Lettere - Ferrara
Year: 2013

description: In his Dialogues of the Gods Lucian is able to link mythical situations which happen in the present with the past or with the future. In this essay some passages from Dialogues will be analysed in order to point out the different way of presenting the connection between the past and the future. Sometimes what happened in the past is simply recalled; less often, past and future are mere hints, and present is an aition of what will happen afterwards. At least in some dialogues the mythical contents are arranged according to the connection between past and future and sometimes the future is represented as a prophecy. Anyway, the different ways of linking past and future are in Luciano’s Dialogues the privileged practice to recover what cannot be told more clearly and to extend the temporal horizon by hinting at mythical events well known to the audience.
description: Annali Online  Lettere - Ferrara, VII 2 (2012)
Analogue and digital tools for ALMA
Creators: name: Mena, Patricio
Publisher: name: Zenodo
Year: 2019

description: Here I present two different technologies that we have been developing at University of Chile and that may find applications at ALMA:

(i) We are working on the development of compact ultra-wide bandwidth receivers for the millimeter band. These receivers are composed of home-made blocks built around MMICs fabricated in a commercial foundry after our own designs.

(ii) We are developing digital tools for correcting the performance of analogue receivers. In this poster I present our work on sideband rejection-ratio and polarization correction.
SIS process development at GARD to serve next generation receivers for ALMA
Creators: name: Pavolotsky, Alexey
Publisher: name: Zenodo
Year: 2019

description: For years, GARD has a stable process for Nb/Al-AlOx/Nb SIS junctions. The track record includes production of SIS mixer chips for the full ALMA Band5 program, as well as APEX SHeFI Bands 1, 2 and 3 and APEX SEPIA Band 5.
The ALMA Development Roadmap calls for a next generation of receivers with about a doubled RF and IF bands compared to today's receivers. This in turn calls for developing stable technologies for fabricating of SIS junctions with lower specific capacitance and smaller size, as well as for new approaches to SIS chip packaging.
On the workshop, we will present the current status and future plans of our development of SIS junction technology.
In particular, the high quality Nb/Al-AlN/Nb junctions fabricated with our in-house process, their Cs vs RnA relation and further technological development towards smaller size junctions, will be discussed. Also, we present our junction packaging approach allowing for arbitrary chip shape and easier and more precise chip mounting
Euchromia horsfieldi
Creators: name: Bolotov, Ivan N.
name: Kondakov, Alexander V.
name: Spitsyn, Vitaly M.
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Arctiidae
Euchromia
Euchromia horsfieldi

description: Euchromia horsfieldi (Moore, 1859)
Fig. 2A
Material examined. INDONESIA, Lesser Sundas, East Nusa Tenggara, Flores Island: south of the town of Labuan Bajo by the road to Gorontalo, secondary forest, 8º32’22”S, 119 º52’39”E, 16-18 January 2015, 1♀, Bolotov leg. (RMBH, voucher no. SPH0723).
..continued on the next page
*An outgroup
.
Distribution: Sumatra, Java, Borneo, Bali, Lesser Sundas, and Christmas Island (Table 1).
Remarks: First record from Flores. The lengthened dark yellow spot below the cell on the forewing of our female specimen is separated by large black triangular inclusion (vs. continuous dark yellow spot with only a minute black inclusion in specimens from Java and Borneo: Moore, 1859; Holloway, 1988).
description: Published as part of Bolotov, Ivan N., Kondakov, Alexander V. & Spitsyn, Vitaly M., 2018, A review of tiger moths (Lepidoptera: Erebidae: Arctiinae: Arctiini) from Flores Island, Lesser Sunda Archipelago, with description of a new species and new subspecies, pp. 1-15 in Ecologica Montenegrina 16 on pages 4-6, DOI: 10.37828/em.2018.16.1, http://zenodo.org/record/8027753
Progress on longer baselines within the current operational model
Creators: name: Philips, Neil
Publisher: name: Zenodo
Year: 2019

description: A progress report of a development study on the feasibility of extending maximum baseline lengths using the existing ALMA systems will be presented. In addition to the specific topic of increased baseline lengths to achieve higher angular resolution, inputs to future upgrade design choices and system specifications will be considered, e.g. the division of central hardware resources between AOS and OSF sites.
Next-to-leading-order study of $J/ψ$ angular distributions in $e^{+}e^{-} \to J/ψ+η_c,χ_{cJ}$ at $\sqrt{s} \approx 10.6$ GeV
Creators: name: Sun, Zhan
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper, we present a detailed next-to-leading-order (NLO) study of $J/ψ$ angular distributions in $e^{+}e^{-} \to J/ψ+η_c,χ_{cJ}$ ($J=0,1,2$) within the nonrelativistic QCD factorization (NRQCD). The numerical NLO expressions for total and differential cross sections, i.e., $\frac{dσ}{d\cosθ}=A+B\cos^2θ$, are both derived. With the inclusion of the newly-calculated QCD corrections to $A$ and $B$, the $α_θ(= B/A)$ parameters in $J/ψ+χ_{c0}$ and $J/ψ+χ_{c1}$ are moderately enhanced, while the magnitude of ${α_θ}_{J/ψ+χ_{c2}}$ is significantly reduced; regarding the production of $J/ψ+η_c$, the $α_θ$ value remains unchanged. By comparing with experiment, we find the predicted ${α_θ}_{J/ψ+η_c}$ is in good agreement with the $\textrm{B}\scriptsize{\textrm{ELLE}}$ measurement; however, ${α_θ}_{J/ψ+χ_{c0}}$ is still totally incompatible with the experimental result, and this discrepancy seems to hardly be cured by proper choices of the charm-quark mass, the renormalization scale, and the NRQCD matrix elements.
description: 14 pages, 4 figures, and 7 tables; accepted for publication in JHEP
Modelling for the estimation of the metabolic energy requirement of laying chickens
Creators: name: Dornan, Robert John
Publisher: name: University of British Columbia
Year: 2010

description: Experiments were conducted to assess the degree of accuracy with which the Metabolizable Energy (M.E.) requirements of laying chickens in production could be predicted. Three of the most recently published prediction models (Emmans 1974, McDonald 1978, and NRC 1981) were evaluated using production data covering a full laying cycle. While each model proved valid under certain environmental, physiological and productive conditions, none was valid over the full production period. A new equation was developed as a derivation of the NRC (1981) equation. ME = 128 W[sup 0.75]* 1.015[sup (25-T)] + 5.50 G + (2.07 * 1.03 [sup (E-62))* (E*R) WHERE: ME = METABOL IZABLE ENERGY, KCAL/DAY W = BODY WEIGHT, KG G = BODY WEIGHT GAIN/LOSS /DAY, GM E = EGG WEIGHT, GM R = 7. RATE OF LAY / 100 T = AMBIENT TEMPERATURE, ° C A factor was included in this new equation to account for the differences in egg component yeild relative to egg weight. This new equation was evaluated against the same full cycle production data as were the Emmans', McDonald and NRC equations and was found to be able to predict M.E. intake with greater accuracy. All four prediction models (Emmans 1974, McDonald 1978, NRC 1981 and Dornan) were then further evaluated using three individual sets of experimental flock production data. The Dornan equation, in all cases, was found to be superior in its ability to predict Metabolizable Energy intake of laying chickens in production.
Collective excitations in one-dimensional ultracold Fermi gases: a comparative study
Creators: name: Li, Wei
name: Xianlong, Gao
name: Kollath, Corinna
name: Polini, Marco
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Time-dependent density-functional theory (TDDFT) is a powerful tool to study the non-equilibrium dynamics of inhomogeneous interacting many-body systems. Here we show that the simple adiabatic local-spin-density approximation for the time-dependent exchange-correlation potential is surprisingly accurate in describing collective density and spin dynamics in strongly correlated one-dimensional ultracold Fermi gases. Our conclusions are based on extensive comparisons between our TDDFT results and accurate results based on the adaptive time-dependent density-matrix renormalization-group method.
description: 11 pages, 6 figures, submitted
Entanglement Action for the Real-Space Entanglement Spectra of Composite Fermion Wave Functions
Creators: name: Henderson, Greg J.
name: Sreejith, G J
name: Simon, Steven H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We argue and numerically substantiate that the real-space entanglement spectrum (RSES) of composite fermion quantum Hall states is given by the spectrum of a local boundary perturbation of a $(1+1)$d conformal field theory (CFT), which describes an effective edge dynamics along the real-space cut. The cut-and-glue approach suggests that the low-lying RSES is equivalent to the low-lying modes of some effective edge action. The general structure of this action is deduced by mapping to a boundary critical problem, generalizing work of Dubail, Read, and Rezayi [PRB 85, 11531 (2012)]. Using trial wave functions we numerically test our model of the RSES for the $ν= 2/3$ bosonic composite fermion state.
description: 24 pages, 6 figures
Olaf Mertelsmann, Kaarel Piirimäe (Hrsg.), The Baltic Sea Region and the Cold War
Creators: name: Boden, Ragna
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2013

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 62 Nr. 2 (2013): Nationalisierung und Pragmatismus. Staatliche Institutionen und Minderheiten in Polen 1918-1939
CONTEMPORARY ECOLOGICAL PROBLEMS
Creators: name: Mirzoyeva, Shaxzoda
Publisher: name: Zenodo
Year: 2025

description: Contemporary ecological problems present complex challenges that directly influence biodiversity, climate stability, and human well-being. Over the last several decades, researchers have identified multiple interacting environmental stressors—ranging from climate change and habitat destruction to pollution and unsustainable resource consumption—that require integrated and multifaceted approaches. Governments, scientists, and communities worldwide have recognized that piecemeal solutions to these problems are insufficient to address the underlying drivers. Instead, holistic strategies that emphasize the interconnectedness of natural systems, social structures, and economic activities must be devised. This article explores the extent to which contemporary ecological problems have grown in complexity, examines existing scholarship addressing these issues, and discusses both traditional and innovative strategies for mitigating them. The results of this analysis suggest that effective solutions necessitate collaborative governance, stakeholder involvement, and the integration of scientific insights into policy frameworks. Ultimately, the pursuit of sustainability requires strong commitment across disciplines and sectors, ensuring the protection of ecosystems for current and future generations.
Bryobia praetiosa Koch 1836
Creators: name: Toroitich, Faith J.
name: Ueckermann, Edward A.
name: Theron, Pieter D.
name: Knapp, Markus
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Prostigmata
Tetranychidae
Bryobia
Bryobia praetiosa

description: Bryobia praetiosa Koch, 1836
Tarsus I very long, more than twice as long as other tarsi. It has five pairs of genitoanal setae and one pair of pregenital setae. Tarsus I with two pairs of duplex setae and tarsus II has one pair. The peritreme ends in a protruding sausage-like structure (anastomosis). Body measurements are as follows: Body length: 550µm, width 350µm. Leg I is 590µm long and leg II is 240µm long.
Leg chaetotaxy as follows: genua 8-6-6-5; femora 21-11-5 -(4/3); coxae 2-1-1-1.
Solenidia on tarsus III and IV associated with tactile setae to form duplex setae. Leg I slightly longer than total body length.
 Specimens examined: Four females collected on Chloris gayana (Poaceae) in Ngarenyiro, Laikipia district (N00°04.971'; E036°55.956') and 3 larvae collected on Sida schimperiana (Malvaceae) from Kitengela, Kajiado district (S01°32.319'; E036°56.497').
 Remarks: This species has a world-wide distribution and occurs on a wide range of low lying host plants belonging to a wide range of families (Migeon and Dorkeld, 2006). Previous records of this species on members of the family Poaceae which include wheat, rye and barley were reported in Arizona (Tuttle and Baker, 1964). In this study, the specimens were collected in savanna grasslands. The species is dark red in colour
description: Published as part of Toroitich, Faith J., Ueckermann, Edward A., Theron, Pieter D. & Knapp, Markus, 2009, The tetranychid mites (Acari: Tetranychidae) of Kenya and a redescription of the species Peltanobia erasmusi Meyer (Acari: Tetranychidae) based on males, pp. 33-47 in Zootaxa 2176 on page 34, DOI: 10.5281/zenodo.189364
Compatible Geometric Matchings
Creators: name: Aichholzer, Oswin
name: Bereg, Sergey
name: Dumitrescu, Adrian
name: García, Alfredo
name: Huemer, Clemens
name: Hurtado, Ferran
name: Kano, Mikio
name: Márquez, Alberto
name: Rappaport, David
name: Smorodinsky, Shakhar
name: Souvaine, Diane
name: Urrutia, Jorge
name: Wood, David R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 52C99

description: This paper studies non-crossing geometric perfect matchings. Two such perfect matchings are \emph{compatible} if they have the same vertex set and their union is also non-crossing. Our first result states that for any two perfect matchings $M$ and $M'$ of the same set of $n$ points, for some $k\in\Oh{\log n}$, there is a sequence of perfect matchings $M=M_0,M_1,...,M_k=M'$, such that each $M_i$ is compatible with $M_{i+1}$. This improves the previous best bound of $k\leq n-2$. We then study the conjecture: \emph{every perfect matching with an even number of edges has an edge-disjoint compatible perfect matching}. We introduce a sequence of stronger conjectures that imply this conjecture, and prove the strongest of these conjectures in the case of perfect matchings that consist of vertical and horizontal segments. Finally, we prove that every perfect matching with $n$ edges has an edge-disjoint compatible matching with approximately $4n/5$ edges.
description: improved exposition and improved results
Cyclic projectors and separation theorems in idempotent convex geometry
Creators: name: Gaubert, Stephane
name: Sergeev, Sergei
Publisher: name: arXiv
Year: 2007
Subjects: subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 52A20, 06F15, 47H07, 52A01

description: Semimodules over idempotent semirings like the max-plus or tropical semiring have much in common with convex cones. This analogy is particularly apparent in the case of subsemimodules of the n-fold cartesian product of the max-plus semiring it is known that one can separate a vector from a closed subsemimodule that does not contain it. We establish here a more general separation theorem, which applies to any finite collection of closed semimodules with a trivial intersection. In order to prove this theorem, we investigate the spectral properties of certain nonlinear operators called here idempotent cyclic projectors. These are idempotent analogues of the cyclic nearest-point projections known in convex analysis. The spectrum of idempotent cyclic projectors is characterized in terms of a suitable extension of Hilbert's projective metric. We deduce as a corollary of our main results the idempotent analogue of Helly's theorem.
description: 20 pages, 1 figure
Nikolaus Olaf Siemaszko, Das oberschlesische Eisenhüttenwesen 1741-1860. Ein regionaler Wachstumssektor
Creators: name: Gehrke, Roland
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2014

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 63 Nr. 2 (2014)
Wide band instantaneous coverage receiver concept for ALMA
Creators: name: Adema, Joost
name: Baryshev, Andrey
Publisher: name: Zenodo
Year: 2019

description: We propose concept of frequency array receiver. Receiver input beam will be quasi-optically frequency multiplexed on several mixer pixels. All individual mixers will be operated simultaneously creating very large input bandwidth covering several atmospheric windows in high frequency resolution. This system allows to combine large bandwidth advantage of direct detecting with high frequency resolution of heterodyne system. We will discuss initial system concept, and report on mixer designs and their performance for building elements. In particularly we report DSB noise temperature below hf/k level at 260GHz mixer prototype. Sensitivity of such system in presents of atmospheric background will be evaluated.
Lutz Budraß (Hrsg.), Industrialisierung und Nationalisierung. Fallstudien zur Geschichte des oberschlesischen Industriereviers im 19. und 20. Jahrhundert
Creators: name: Parent, Thomas
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2014

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 63 Nr. 4 (2014)
Implications of the cosmic ray spectrum for the mass composition at the highest energies
Creators: name: Allard, D.
name: Busca, N. G
name: Decerprit, G.
name: Olinto, A. V.
name: Parizot, E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The significant attenuation of the cosmic-ray flux above $\sim 5 10^{19}$ eV suggests that the observed high-energy spectrum is shaped by the so-called GZK effect. This interaction of ultra-high-energy cosmic rays (UHECRs) with the ambient radiation fields also affects their composition. We review the effect of photo-dissociation interactions on different nuclear species and analyze the phenomenology of secondary proton production as a function of energy. We show that, by itself, the UHECR spectrum does not constrain the cosmic-ray composition at their extragalactic sources. While the propagated composition (i.e., as observed at Earth) cannot contain significant amounts of intermediate mass nuclei (say between He and Si), whatever the source composition, and while it is vastly proton-dominated when protons are able to reach energies above $10^{20}$ eV at the source, we show that the propagated composition can be dominated by Fe and sub-Fe nuclei at the highest energies, either if the sources are very strongly enriched in Fe nuclei (a rather improbable situation), or if the accelerated protons have a maximum energy of a few $10^{19}$ eV at the sources. We also show that in the latter cases, the expected flux above $3 10^{20}$ eV is very much reduced compared to the case when protons dominate in this energy range, both at the sources and at Earth.
description: 16 pages, 7 figures
Piotr Kuroczyński, Die Medialisierung der Stadt. Analoge und digitale Stadtführer zur Stadt Breslau nach 1945
Creators: name: Tamáska, Máté Dávid
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2013

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 62 Nr. 2 (2013): Nationalisierung und Pragmatismus. Staatliche Institutionen und Minderheiten in Polen 1918-1939
High pCO$_2$ reduces sensitivity to CO$_2$ perturbations on temperate, Earth-like planets throughout most of habitable zone
Creators: name: Graham, R. J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The nearly logarithmic radiative impact of CO$_2$ means that planets near the outer edge of the liquid water habitable zone (HZ) require $\sim$10$^6$x more CO$_2$ to maintain temperatures conducive to standing liquid water on the planetary surface than their counterparts near the inner edge. This logarithmic radiative response also means that atmospheric CO$_2$ changes of a given mass will have smaller temperature effects on higher pCO$_2$ planets. Ocean pH is linked to atmospheric pCO$_2$ through seawater carbonate speciation and calcium carbonate dissolution/precipitation, and the response of pH to changes in pCO$_2$ also decreases at higher initial pCO$_2$. Here, we use idealized climate and ocean chemistry models to demonstrate that CO$_2$ perturbations large enough to cause catastrophic changes to surface temperature and ocean pH on low-pCO$_2$ planets in the innermost region of the HZ are likely to have much smaller effects on planets with higher pCO$_2$. Major bouts of extraterrestrial fossil fuel combustion or volcanic CO$_2$ outgassing on high-pCO$_2$ planets in the mid-to-outer HZ should have mild or negligible impacts on surface temperature and ocean pH. Owing to low pCO$_2$, Phanerozoic Earth's surface environment may be unusually volatile compared to similar planets receiving lower instellation.
description: Submitted November 30, 2020; Reviews received March 23rd, 2021; Resubmitted April 2, 2021
Importance of the ion-pair lifetime in polymer electrolytes
Creators: name: Gudla, Harish
name: Shao, Yunqi
name: Phunnarungsi, Supho
name: Brandell, Daniel
name: Zhang, Chao
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Ion-pairing is commonly considered as a culprit for the reduced ionic conductivity in polymer electrolyte systems. However, this simple thermodynamic picture should not be taken literally, as ion-pairing is a dynamical phenomenon. Here we construct model PEO-LiTFSI systems with different degree of ion-pairing by tuning solvent polarity, and examine the relation between the cation-anion distinct conductivity $σ^\rm{d}_{+-}$ and the lifetime of ion-pairs $τ_{+-}$ using molecular dynamics simulations. It is found that there exist two distinct regimes where $σ^\rm{d}_{+-}$ scales with $1/τ_{+-}$ and $τ_{+-}$ respectively, and the latter is a signature of longer-lived ion-pairs which contribute negatively to the total ionic conductivity. This suggests that ion-pairs are kinetically different depending on the solvent polarity, which renders the ion-pair lifetime highly important when discussing its effect on ion transport in polymer electrolyte systems.
Paraplonobia (Anaplonobia) prosopis Tuttle & Baker 1964
Creators: name: Toroitich, Faith J.
name: Ueckermann, Edward A.
name: Theron, Pieter D.
name: Knapp, Markus
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Prostigmata
Tetranychidae
Paraplonobia
Paraplonobia prosopis

description: Paraplonobia (Anaplonobia) prosopis (Tuttle & Baker, 1964)
 Aplonobia prosopis Tuttle & Baker, 1964; Neopetrobia prosopis Meyer, 1987
The peritremes end in anastomosis with a network of cell-like structures. Prodorsal and opisthosomal setae are strongly serrate and sub-spatulate with e2, f1, f2 and h 1 set on small tubercles. Setae well separated from each other, almost equidistant between all dorsocentrals, dorsal setae sub-equal in length. Dorsal striations faint, longitudinal on prodorsum and transverse on hysterosoma and without lobes. Leg setae strong, lanceolate and serrated. Legs shorter than the body.
Leg chaetotaxy as follows: tarsi 13(2)-10(1)-9-8; tibiae 9-7-8-7; genua 4-4-3-2; femora 5-4-3-3; coxae 2- 2-1-1.
 Specimens examined: Four females collected on Prosopis juliflora (Fabaceae) from Marigat, Baringo district (N00°28.907'; E036°03.230').
 Remarks: P. prosopis Tuttle and Baker was first described from Prosopis juliflora in Arizona (United States of America) and the second record of this species is from Mexico (Tuttle and Baker, 1964). This is the first record of this species in the Afro-tropical region on P. juliflora which is an invasive plant species in Kenya after being introduced as a land reclamation plant in the semi-arid parts of the country. It is therefore possible that this mite was introduced together with its host plant although in our collection, the mite population was very low and the damage symptoms could not be observed on the host plant. The males of this species are not known. In the field, this species is dark red in colour.
description: Published as part of Toroitich, Faith J., Ueckermann, Edward A., Theron, Pieter D. & Knapp, Markus, 2009, The tetranychid mites (Acari: Tetranychidae) of Kenya and a redescription of the species Peltanobia erasmusi Meyer (Acari: Tetranychidae) based on males, pp. 33-47 in Zootaxa 2176 on page 35, DOI: 10.5281/zenodo.189364
Jerzy Lukowski, Disorderly Liberty. The Political Culture of the Polish-Lithuanian Commonwealth in the Eighteenth Century
Creators: name: Faber, Martin
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2014

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 63 Nr. 2 (2014)
Scale Equivariant Neural Networks with Morphological Scale-Spaces
Creators: name: Sangalli, Mateus
name: Blusseau, Samy
name: Velasco-Forero, Santiago
name: Angulo, Jesus
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The translation equivariance of convolutions can make convolutional neural networks translation equivariant or invariant. Equivariance to other transformations (e.g. rotations, affine transformations, scalings) may also be desirable as soon as we know a priori that transformed versions of the same objects appear in the data. The semigroup cross-correlation, which is a linear operator equivariant to semigroup actions, was recently proposed and applied in conjunction with the Gaussian scale-space to create architectures which are equivariant to discrete scalings. In this paper, a generalization using a broad class of liftings, including morphological scale-spaces, is proposed. The architectures obtained from different scale-spaces are tested and compared in supervised classification and semantic segmentation tasks where objects in test images appear at different scales compared to training images. In both classification and segmentation tasks, the scale-equivariant architectures improve dramatically the generalization to unseen scales compared to a convolutional baseline. Besides, in our experiments morphological scale-spaces outperformed the Gaussian scale-space in geometrical tasks.
Attractors for weak and strong solutions of the three-dimensional Navier-Stokes equations with damping
Creators: name: Pardo, Daniel
name: Valero, José
name: Giménez, Ángel
Publisher: name: arXiv
Year: 2024
Subjects: subject: Analysis of PDEs (math.AP)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 35B40, 35B41, 35K55, 35Q30, 37B25, 58C06

description: In this paper we obtain the existence of global attractors for the dynamical systems generated by weak solution of the three-dimensional Navier-Stokes equations with damping. We consider two cases, depending on the values of the parameters \b{eta},α controlling the damping term and the viscosity μ. First, for \b{eta} we define a multivalued dynamical systems and prove the existence of the global attractor as well. Second, for either \b{eta}>3 or \b{eta}=3, 4αμ>1 the weak solutions are unique and we prove that the global attractor for the corresponding semigroup is more regular. Also, we prove in this case that it is the global attractor for the semigroup generated by the strong solutions. Finally, some numerical simulations are performed.
Benchmark on neutron capture extracted from $(d,p)$ reactions
Creators: name: Mukhamedzhanov, A. M.
name: Nunes, F. M.
name: Mohr, P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Direct neutron capture reactions play an important role in nuclear astrophysics and applied physics. Since for most unstable short-lived nuclei it is not possible to measure the $(n, γ)$ cross sections, $(d,p)$ reactions have been used as an alternative indirect tool. We analyze simultaneously $^{48}{\rm Ca}(d,p)^{49}{\rm Ca}$ at deuteron energies $2, 13, 19$ and 56 MeV and the thermal $(n,γ)$ reaction at 25 meV. We include results for the ground state and the first excited state of $^{49}$Ca. From the low-energy $(d,p)$ reaction, the neutron asymptotic normalization coefficient (ANC) is determined. Using this ANC, we extract the spectroscopic factor (SF) from the higher energy $(d,p)$ data and the $(n, γ)$ data. The SF obtained through the 56 MeV $(d,p)$ data are less accurate but consistent with those from the thermal capture. We show that to have a similar dependence on the single particle parameters as in the $(n, γ)$, the (d,p) reaction should be measured at 30 MeV.
description: 5 pg, 4 figs, Phys. Rev. C (rapid) in press
Katarzyna Stokłosa, Polen und die deutsche Ostpolitik 1945-1990
Creators: name: Wiaderny, Bernard
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2013

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 62 Nr. 2 (2013): Nationalisierung und Pragmatismus. Staatliche Institutionen und Minderheiten in Polen 1918-1939
High-resolution models of solar granulation: the 2D case
Creators: name: Muthsam, H. J.
name: Loew-Baselli, B.
name: Obertscheider, Chr.
name: Langer, M.
name: Lenz, P.
name: Kupka, F.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Using grid refinement, we have simulated solar granulation in 2D. The refined region measures 1.97*2.58 Mm (vertical*horizontal). Grid spacing there is 1.82*2.84 km. The downflows exhibit strong Kelvin-Helmholtz instabilities. Below the photosphere, acoustic pulses are generated. They proceed laterally (in some cases distances of at least the size of our refined domain) and may be enhanced when transversing downflows) as well as upwards where, in the photosphere they contribute significantly to 'turbulence' (velocity gradients, etc.) The acoustic pulses are ubiquitous in that at any time several of them are seen in our high-resolution domain. Their possible contributions to p-mode excitation or heating of the chromosphere needs to be investigated.
Interlayer exciton mediated second harmonic generation in bilayer MoS2
Creators: name: Shree, Shivangi
name: Lagarde, Delphine
name: Lombez, Laurent
name: Robert, Cedric
name: Balocchi, Andrea
name: Watanabe, Kenji
name: Taniguchi, Takashi
name: Marie, Xavier
name: Gerber, Iann C.
name: Glazov, Mikhail M.
name: Golub, Leonid E.
name: Urbaszek, Bernhard
name: Paradisanos, Ioannis
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Second harmonic generation (SHG) is a non-linear optical process, where two photons coherently combine into one photon of twice their energy. Efficient SHG occurs for crystals with broken inversion symmetry, such as transition metal dichalcogenide monolayers. Here we show tuning of non-linear optical processes in an inversion symmetric crystal. This tunability is based on the unique properties of bilayer MoS2, that shows strong optical oscillator strength for the intra- but also inter-layer exciton resonances. As we tune the SHG signal onto these resonances by varying the laser energy, the SHG amplitude is enhanced by several orders of magnitude. In the resonant case the bilayer SHG signal reaches amplitudes comparable to the off-resonant signal from a monolayer. In applied electric fields the interlayer exciton energies can be tuned due to their in-built electric dipole via the Stark effect. As a result the interlayer exciton degeneracy is lifted and the bilayer SHG response is further enhanced by an additional two orders of magnitude, well reproduced by our model calculations.
description: main paper and supplement
What do we mean, 'tipping cascade'?
Creators: name: Klose, Ann Kristin
name: Wunderling, Nico
name: Winkelmann, Ricarda
name: Donges, Jonathan F
Publisher: name: arXiv
Year: 2021
Subjects: subject: Geophysics (physics.geo-ph)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: Based on suggested interactions of potential tipping elements in the Earth's climate and in ecological systems, tipping cascades as possible dynamics are increasingly discussed and studied as their activation would impose a considerable risk for human societies and biosphere integrity. However, there are ambiguities in the description of tipping cascades within the literature so far. Here we illustrate how different patterns of multiple tipping dynamics emerge from a very simple coupling of two previously studied idealized tipping elements. In particular, we distinguish between a two phase cascade, a domino cascade and a joint cascade. While a mitigation of an unfolding two phase cascade may be possible and common early warning indicators are sensitive to upcoming critical transitions to a certain degree, the domino cascade may hardly be stopped once initiated and critical slowing down--based indicators fail to indicate tipping of the following element. These different potentials for intervention and anticipation across the distinct patterns of multiple tipping dynamics should be seen as a call to be more precise in future analyses on cascading dynamics arising from tipping element interactions in the Earth system.
Šarūnas Liekis u.a. (Hrsg.), Jews in the Former Grand Duchy of Lithuania since 1772
Creators: name: Volbikaitė, Goda
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2014

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 63 Nr. 4 (2014)
Peltanobia Meyer 1974
Creators: name: Toroitich, Faith J.
name: Ueckermann, Edward A.
name: Theron, Pieter D.
name: Knapp, Markus
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Prostigmata
Tetranychidae
Peltanobia

description: Peltanobia Meyer 1974 (Bryobiinae: Hystrichonychiini)
 Prodorsum with three pairs of setae and opisthosoma with ten pairs of dorsal setae. The first four pairs of dorsocentrals c1, d1 e 1 and f1 are located on cushion-like sclerites.
description: Published as part of Toroitich, Faith J., Ueckermann, Edward A., Theron, Pieter D. & Knapp, Markus, 2009, The tetranychid mites (Acari: Tetranychidae) of Kenya and a redescription of the species Peltanobia erasmusi Meyer (Acari: Tetranychidae) based on males, pp. 33-47 in Zootaxa 2176 on page 35, DOI: 10.5281/zenodo.189364
Advanced tuning algorithms for high-frequency SIS mixers
Creators: name: Barkhof, Jan
name: Baryshev, Andrey
Publisher: name: Zenodo
Year: 2019

description: Three tuning parameters are key to SIS performance: SIS bias voltage, LO pumping level and Josephson current suppression. The former two are relatively easy to perform automatically, although there are a couple of pitfalls. The suppression of the Josephson current, however, is much more complicated, especially in the high-current-density AlN-barrier junctions used in ALMA Band 9. The tuning parameter sets that were supplied with the receivers were always biased towards safer and more repeatable regimes for operational reasons. Here we present results of the ALMA Band 9 Advanced Tuning Study commissioned by ESO. The objective of this study is to investigate more "intelligent" tuning algorithms which should enable the receivers to operate in more critical regimes that were previously avoided, but with possibly a considerable increase in performance.