cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Performance Tuning of N-Body Codes on Modern Microprocessors: I. Direct Integration with a Hermite Scheme on x86_64 Architecture
Creators: name: Nitadori, Keigo
name: Makino, Junichiro
name: Hut, Piet
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The main performance bottleneck of gravitational N-body codes is the force calculation between two particles. We have succeeded in speeding up this pair-wise force calculation by factors between two and ten, depending on the code and the processor on which the code is run. These speedups were obtained by writing highly fine-tuned code for x86_64 microprocessors. Any existing N-body code, running on these chips, can easily incorporate our assembly code programs. In the current paper, we present an outline of our overall approach, which we illustrate with one specific example: the use of a Hermite scheme for a direct N^2 type integration on a single 2.0 GHz Athlon 64 processor, for which we obtain an effective performance of 4.05 Gflops, for double precision accuracy. In subsequent papers, we will discuss other variations, including the combinations of N log N codes, single precision implementations, and performance on other microprocessors.
description: 32 pages, 2 figures
Barrow agegraphic dark energy
Creators: name: Sharma, Umesh Kumar
name: Varshney, Gunjan
name: Dubey, Vipin Chandra
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this work, we propose a new dark energy model by applying the Barrow entropy and the holographic principle, with a time scale as IR cut off. Analysing the conformal time as well as universe's age as infrared cut-offs, we explore the cosmological importance of the suggested dark energy models and examine the universe evolution filled with the proposed DE applicants and a pressure-less matter. We observe that the equation of state, deceleration, the density parameters can present adequate nature, and these models may also explain the late-time acceleration though, the proposed models are unstable except some values of Barrow exponent $Δ$. Furthermore, we mention the consequences of the presence of interaction among the universe sectors.
Hierarchical star formation in nearby galaxies
Creators: name: Rodríguez, María Jimena
name: Baume, Gustavo
name: Feinstein, Carlos
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Aims: The purpose of this work is to study the properties of the spatial distribution of the young population in three nearby galaxies in order to better understand the first stages of star formation. Methods: We used ACS/HST photometry and the "path-linkage criterion" in order to obtain a catalog of young stellar groups (YSGs) in the galaxy NGC 2403. We studied the internal distribution of stars in these YSGs using the Q parameter. We extended these analyses to the YSGs detected in in NGC 300 and NGC 253 our previous works. We built the young stars' density maps for these three galaxies. Through these maps, we were able to identify and study young stellar structures on larger scales. Results: We found 573 YSGs in the galaxy NGC 2403, for which we derived their individual sizes, densities, luminosity function,and other fundamental characteristics. We find that the vast majority of the YSGs in NGC 2403, NGC 300 and NGC 253 present inner clumpings, following the same hierarchical behavior that we observed in the young stellar structures on larger scales in these galaxies. We derived values of the fractal dimension for these structures between ~ 1.5 and 1.6. These values are very similar to those obtained in other star forming galaxies and in the interstellar medium, suggesting that the star formation process is regulated by supersonic turbulence.
description: 10 pages, 10 figures, 2 tables, Accepted for publication in A&A
All-optical switching in a two-channel waveguide with cubic-quintic nonlinearity
Creators: name: Driben, Rodislav
name: Malomed, Boris A
name: Chu, Pak L
Publisher: name: arXiv
Year: 2006
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We consider dynamics of spatial beams in a dual-channel waveguide with competing cubic and quintic (CQ) nonlinearities. Gradually increasing the power in the input channel, we identify four different regimes of the pulses coupling into the cross channel, which alternate three times between full pass and full stop, thus suggesting three realizations of switching between the channels. As in the case of the Kerr (solely cubic) nonlinearity, the first two regimes are the linear one, and one dominated by the self-focusing nonlinearity, with the beam which, respectively, periodically couples between the channels, or stays in the input channel. Further increase of the power reveals two novel transmission regimes, one characterized by balance between the competing nonlinearities, which again allows full coupling between the channels, and a final regime dominated by the self-defocusing quintic nonlinearity. In the latter case, the situation resembles that known for a self-repulsive Bose-Einstein condensate trapped in a double-well potential, which is characterized by strong symmetry breaking; accordingly, the beam again abides in the input channel, contrary to an intuitive expectation that the self-defocusing nonlinearity would push it into the cross channel. The numerical results are qualitatively explained by a simple analytical model based on the variational approximation.
description: Journal of Physics B (in press)
On a nontrivial knot projection under (1, 3) homotopy
Creators: name: Ito, Noboru
name: Takimura, Yusuke
Publisher: name: arXiv
Year: 2020
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: In 2001, Östlund formulated the question: are Reidemeister moves of types 1 and 3 sufficient to describe a homotopy from any generic immersion of a circle in a two-dimensional plane to an embedding of the circle? The positive answer to this question was treated as a conjecture (Östlund conjecture). In 2014, Hagge and Yazinski disproved the conjecture by showing the first counterexample with a minimal crossing number of 16. This example is naturally extended to counterexamples with given even minimal crossing numbers more than 14. This paper obtains the first counterexample with a minimal crossing number of 15. This example is naturally extended to counterexamples with given odd minimal crossing numbers more than 13.
description: 8 pages, 14 figures
An alle Bischofskonferenzen und Bischöfe. An alle, die in der biblischen Animation der Pastoral Verantwortung tragen
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 43 Nr. 2 (1994): Ökumenische Rundschau, Band 43, Heft 2
The role of clearance mechanisms in the kinetics of toxic protein aggregates involved in neurodegenerative diseases
Creators: name: Thompson, Travis B.
name: Meisl, Georg
name: Knowles, Tuomas
name: Goriely, Alain
Publisher: name: arXiv
Year: 2020
Subjects: subject: Biomolecules (q-bio.BM)
subject: Cell Behavior (q-bio.CB)
subject: FOS: Biological sciences

description: Protein aggregates in the brain play a central role in cognitive decline and structural damage associated with neurodegenerative diseases. For instance, in Alzheimer's disease the formation of Amyloid-beta plaques and tau proteins neurofibrillary tangles follows from the accumulation of different proteins into large aggregates through specific mechanisms such as nucleation and elongation. These mechanisms have been studied in vitro where total protein mass is conserved. However, in vivo, clearance mechanisms may play an important role in limiting the formation of aggregates. Here, we generalise classical models of protein aggregation to take into account both production of monomers and the clearance of protein aggregates. Depending on the clearance model, we show that there may be a critical clearance value above which aggregation does not take place. Our result offers further evidence in support of the hypotheses that clearance mechanisms play a potentially crucial role in neurodegenerative disease initiation and progression; and as such, are a possible therapeutic target.
description: 25 pages, 7 figures
Characterisation of single-crystal diamond grit for construction applications
Creators: name: Nailer, S.
name: Klein, T.
name: Müller, M.
name: Grasberger, S.
Publisher: name: International Conference on Stone and Concrete Machining (ICSCM)
Year: 2015
Subjects: Diamond; diamond segment; drilling; sawing; particle characterisation; particle size; particle shape; diamond strength; friability; image analysis

description: The last ten years have seen a step-change in the ability to position diamond particles in metalmatrix
segments for drilling and sawing applications. Advances in segment assembly technology
allow diamonds to be positioned at specific locations within the segment. Performance of the
segment can be optimized when the diamond particles are themselves selected to best exploit
arranged-diamond segment design and other cutting conditions (such as tool drive parameters).
Diamond ‘grit’ products for stone and construction applications each comprise particles of various
sizes, shapes, strengths and purities. Consequently, effective selection of diamond types is
dependent upon measurement using appropriate laboratory ‘characterisation’ techniques. As many
of these techniques yield results on individual particles rather than bulk ‘figures-of-merit’, effective
interpretation of these results is dependent on appropriate statistical analyses.
This paper will introduce the key characteristics of diamond products for construction applications,
provide insights into appropriate laboratory characterisation techniques, and describe how their
results may be best interpreted to facilitate understanding and consequent diamond selection.
description: International Conference on Stone and Concrete Machining (ICSCM), Vol 3 (2015)
title: Dagstuhl Reports, Table of Contents, Volume 2, Issue 4, 2012
Creators: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Publisher: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Year: 2012
Subjects: subject: Dagstuhl Reports
subject: Table of Contents
subject: Volume 2
subject: Issue 4
subject: 2012

description: Table of Contents, Frontmatter
description: Dagstuhl Reports, Volume 2, Issue 4, pages i-ii
Revisiting migration in a disc cavity to explain the high eccentricities of warm Jupiters
Creators: name: Debras, F.
name: Baruteau, C.
name: Donati, J. -F.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The distribution of eccentricities of warm giant exoplanets is commonly explained through planet--planet interactions, although no physically sound argument favours the ubiquity of such interactions. No simple, generic explanation has been put forward to explain the high mean eccentricity of these planets. In this paper, we revisit a simple, plausible explanation to account for the eccentricities of warm Jupiters: migration inside a cavity in the protoplanetary disc. Such a scenario allows to excite the outer eccentric resonances, a working mechanism for higher mass planets, leading to a growth in the eccentricity while preventing other, closer resonances to damp eccentricity. We test this idea with diverse numerical simulations, which show that the eccentricity of a Jupiter-mass planet around a Sun-like star can increase up to 0.4, a value never reached before with solely planet--disc interactions. This high eccentricity is comparable to, if not larger than, the median eccentricity of warm Saturn- to Jupiter-mass exoplanets. We also discuss the effects such a mechanism would have on exoplanet observations. This scenario could have strong consequences on the discs lifetime and the physics of inner disc dispersal, which could be constrained by the eccentricity distribution of gas giants.
Factors that influence health behaviors among Middle Eastern college women in the United States
Creators: name: Kozachek, Constance
Publisher: name: No Publisher Supplied
Year: 2021

description: Study Purpose: We know there are problematic health behaviors among college students. College students are faced with adjustments in academic workload, social pressures, anxiety, and changes in supportive networks. It is also known that in the United States, problematic health behaviors exist among immigrant populations. Therefore, health behaviors among immigrant college students may also be impacted by social exclusion, socioeconomic status, and access to health care services. Studies report health behaviors among college students in American colleges; however, we know very little about Middle Eastern college students in the United States. Despite Middle Eastern population growth in the US, little is known about the Middle Eastern community; more specifically, little is known about Middle Eastern college women in the United States. Therefore, the purpose of this study was to examine the rates and correlates of health behaviors among Middle Eastern college women in the United States. Methodology: This descriptive correlational study examined the rates and correlates of health behaviors among Middle Eastern college women in the United States. Analysis: Statistical analysis tested the hypothesis and built predictive models of factors associated with health behaviors among the study sample. The analysis proceeded in three stages. The first stage consisted of descriptive (univariate) analysis. The second stage consisted of bivariate analysis. Chi-square was used to examine the effect of the categorical predictors on health behaviors. The t-test was used to examine the effect of continuous predictors on health behaviors. The third stage consisted of hierarchical multivariate regression analysis, which built models of the predictors. Results: Four hundred and six Middle Eastern college women participated in the study. Findings address factors that influence health behaviors in this population, including individual, sociocultural, and access to care.Conclusion: Policy implications for program interventions were identified to address risky health behaviors. The benefits derived from the study findings have provided us with implications for policy, practice, and future research. The study design, integrative theoretical model, and findings contribute to the current literature, which is lacking in data related to factors that influence health behaviors among this population.
Relativity in Classical Mechanics: Momentum, Energy and the Third Law
Creators: name: Assumpcao, R
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: Most of the logical objections against the classical laws of motion, as they are usually presented in textbooks, centre on the fact that defining force in terms of mass and acceleration, the first two laws are mere assertions of concepts to be introduced in the theory; conversely, the third law expresses the experimental fact that the ratio of masses is inversely proportional to the ratio of accelerations, but it is known to fail when the interacting bodies are rapidly accelerated or far apart, leading to objections at the research level, particularly when electromagnetic phenomena is present. Following a specification of the coordinate system with respect to which velocities and accelerations are to be measured, relative to a fixed spacetime point, this contribution argues that the limitation of the third law is removed; as a consequence, Energy and Momentum relations are given an alternative formulation, extending their fundamental aspects and terms to the relativistic level. Most important, the presented alternative relations seem to preserve exactly the same form of the concepts as originally used by Newton in the Principia.
description: 8 pages, 2 figures, replaced to conform with published version
D-Brane Actions in Non-Relativistic String Theory and T-Duality
Creators: name: Kluson, J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study D-brane actions in non-relativistic string theory. We consider single D-brane and analyse its properties under T-duality. We also derive an action for N D8-branes and also for lower dimensional D-branes through T-duality transformations.
description: 14 pages
D5.6 Report on application guidelines
Creators: name: Wenning, Rigo
Publisher: name: Zenodo
Year: 2020
Subjects: data protection, data processing, use case, legal requirements

description: This document first explains the overall abstract concept behind SPECIAL. Because SPECIAL uses known technologies and extends them in specific ways, an implementer needs to understand the basic ideas behind it. This includes technical aspects, opportunistic benefiting from existing situations and hints on how to deal with certain legal requirements. Because data protection and data processing potentially can cover every aspect of live, boundaries for the comprehensive approach have to be found. SPECIAL has chosen to use the approach via use cases. It has three industry partners and as many use cases. Two use cases concern location based services and one concerns a compliance mechanism in a highly regulated environment. SPECIAL also created a generic location based service to exemplify findings. This generic use case used the now common fitness bracelets that are monitoring your daily life. Following the presentation of the general concept, this report takes a consulting approach by giving hints on where to start and how to prepare the grounds based on the use cases that were explored.
title: Dagstuhl Reports, Table of Contents, Volume 2, Issue 5, 2012
Creators: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Publisher: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Year: 2012
Subjects: subject: Dagstuhl Reports
subject: Table of Contents
subject: Volume 2
subject: Issue 5
subject: 2012

description: Table of Contents, Frontmatter
description: Dagstuhl Reports, Volume 2, Issue 5, pages i-ii
Brycon costaricensis Angulo & Gracian-Negrete 2013
Creators: name: Angulo, Arturo
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Actinopterygii
Characiformes
Bryconidae
Brycon
Brycon costaricensis

description: 5) Brycon costaricensis Angulo & Gracian-Negrete, 2013;
Bryconidae.
Costa Rican Machaca, Machaca, Macabi Tetra; Machaca, Sábalo, Sabalete, Machaca del Atlántico, Machaca de Costa Rica (Fig. 4A–B).
New record for the Bebedero River basin; previous records of the species in Costa Rican freshwaters were restricted to Atlantic drainages. Basis of the record: Eight specimens were captured in the río Corobicí, near Palmira, Cañas, Guanacaste (10.55285, -85.09607), at 208 m. a.s.l., on May 2, 2021, by Jorge San Gil and Arturo Angulo; an additional specimen was captured in an artificial (irrigation) canal (Canal Oeste) on the Cañas-Upala road, Cañas, Guanacaste (10.47837, -85.13624), at 60 m. a.s.l., on May 2, 2021, by Pablo Morales, Jorge San Gil, Susana Gutiérrez and Arturo Angulo.Additional records on the region (including the Bebedero and Corobicí Rivers) were confirmed by artisanal and sport anglers.
description: Published as part of Angulo, Arturo, 2021, New records and range extensions to the Costa Rican freshwater fish fauna, with an updated checklist, pp. 1-72 in Zootaxa 5083 (1) on page 13, DOI: 10.11646/zootaxa.5083.1.1, http://zenodo.org/record/5800630
Geometry of vector bundle extensions and applications to a generalised theta divisor
Creators: name: Hitching, George H.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14H60, 14H51

description: Let E and F be vector bundles over a complex projective smooth curve X, and suppose that 0 -> E -> W -> F -> 0 is a nontrivial extension. Let G be a subbundle of F, and D an effective divisor on X. We give a criterion for the subsheaf G(-D) \subset F to lift to W, in terms of the geometry of a scroll in the extension space \PP H^1 (X, Hom(F, E)). We use this criterion to describe the tangent cone to the generalised theta divisor on the moduli space of semistable bundles of rank r and slope g-1 over X, at a stable point. This gives a generalisation of a case of the Riemann-Kempf singularity theorem for line bundles over X. In the same vein, we generalise the geometric Riemann-Roch theorem to vector bundles of slope g-1 and arbitrary rank.
description: Main theorem slightly weakened; statement and proof significantly more compact
X-ray Bursts from the Transient Magnetar Candidate XTE J1810-197
Creators: name: Woods, P. M.
name: Kouveliotou, C.
name: Gavriil, F. P.
name: Kaspi, V. M.
name: Roberts, M. S. E.
name: Ibrahim, A.
name: Markwardt, C. B.
name: Swank, J. H.
name: Finger, M. H.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have discovered four X-ray bursts, recorded with the Rossi X-ray Timing Explorer Proportional Counter Array between 2003 September and 2004 April, that we show to originate from the transient magnetar candidate XTE J1810-197. The burst morphologies consist of a short spike or multiple spikes lasting ~1 s each followed by extended tails of emission where the pulsed flux from XTE J1810-197 is significantly higher. The burst spikes are likely correlated with the pulse maxima, having a chance probability of a random phase distribution of 0.4%. The burst spectra are best fit to a blackbody with temperatures 4-8 keV, considerably harder than the persistent X-ray emission. During the X-ray tails following these bursts, the temperature rapidly cools as the flux declines, maintaining a constant emitting radius after the initial burst peak. During the brightest X-ray tail, we detect a narrow emission line at 12.6 keV with an equivalent width of 1.4 keV and a probability of chance occurrence less than 4 x 10^-6. The temporal and spectral characteristics of these bursts closely resemble the bursts seen from 1E 1048.1-5937 and a subset of the bursts detected from 1E 2259+586, thus establishing XTE J1810-197 as a magnetar candidate. The bursts detected from these three objects are sufficiently similar to one another, yet significantly different from those seen from soft gamma repeaters, that they likely represent a new class of bursts from magnetar candidates exclusive (thus far) to the anomalous X-ray pulsar-like sources.
description: Accepted for publication in ApJ. 26 pages and 11 figures
Baryogenesis through Asymmetric Hawking Radiation from Primordial Black Holes as Dark Matter
Creators: name: Boudon, Alexis
name: Bose, Benjamin
name: Huang, Hyat
name: Lombriser, Lucas
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We examine the extent to which primordial black holes (PBHs) can constitute the observed dark matter while also giving rise to the measured matter-antimatter asymmetry and account for the observed baryon abundance through asymmetric Hawking radiation generated by a derivative coupling of curvature to the baryon-lepton current. We consider both broad and monochromatic mass spectra for this purpose. For the monochromatic spectrum we find that the correct dark matter and baryon energy densities are recovered for peak masses of the spectrum of $M_{\rm pk} \geq 10^{12}$ kg whereas for the broad case the observed energy densities can be reproduced regardless of peak mass. Adopting some simplifications for the early-time expansion history as a first approximation, we also find that the measured baryon asymmetry can be recovered within an order of magnitude. We argue furthermore that the correct value of the baryon-lepton yield can in principle be retrieved for scenarios where a significant amount of the radiation is produced by PBH decay during or after reheating, as is expected when the decaying PBHs also cause reheating, or when an early matter-dominated phase is considered. We conclude from this first analysis that the model merits further investigation.
description: 26 pages, 6 figures, 2 tables
Milliarcsecond-Scale Structure in the Gamma-Ray Loud Quasar PKS 1622-297
Creators: name: Wajima, Kiyoaki
name: Bignall, Hayley E.
name: Kobayashi, Hideyuki
name: Hirabayashi, Hisashi
name: Murata, Yasuhiro
name: Edwards, Philip G.
name: Tsuboi, Masato
name: Fujisawa, Kenta
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have made a high-resolution VLBI observation of the gamma-ray loud quasar PKS 1622-297 with the HALCA spacecraft and ground radio telescopes at 5 GHz in 1998 February, almost three years after the source exhibited a spectacular GeV gamma-ray flare. The source shows an elongated structure toward the west on the parsec scale. The visibility data are well modeled by three distinct components; a bright core and two weaker jet components. Comparison with previous observations confirms that the jet components have an apparent superluminal motion up to 12.1 h^{-1}c, with the inner jet components having lower superluminal speeds. We apply the inverse Compton catastrophe model and derive a Doppler factor, δ, of 2.45, which is somewhat lower than that of other gamma-ray loud active galactic nuclei (AGNs), suggesting the source was in a more quiescent phase at the epoch of our observation. As an alternative probe of the sub-parsec scale structure, we also present the results from multi-epoch ATCA total flux monitoring, which indicate the presence of persistent intraday variability consistent with refractive interstellar scintillation. We examine the gamma-ray emission mechanism in the light of these observations.
description: 10 pages, 6 figures, 3 tables, to appear in PASJ, Vol.58, No.1
Measurement of the separation between atoms beyond diffraction limit
Creators: name: Chang, Jun-Tao
name: Evers, Joerg
name: Scully, Marlan O.
name: Zubairy, M. Suhail
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Precision measurement of small separations between two atoms or molecules has been of interest since the early days of science. Here, we discuss a scheme which yields spatial information on a system of two identical atoms placed in a standing wave laser field. The information is extracted from the collective resonance fluorescence spectrum, relying entirely on far-field imaging techniques. Both the interatomic separation and the positions of the two particles can be measured with fractional-wavelength precision over a wide range of distances from bout lambda/550 to lambda/2.
description: v2: Revised version for publication
title: Dagstuhl Reports, Table of Contents, Volume 2, Issue 6, 2012
Creators: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Publisher: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Year: 2012
Subjects: subject: Dagstuhl Reports
subject: Table of Contents
subject: Volume 2
subject: Issue 6
subject: 2012

description: Table of Contents, Frontmatter
description: Dagstuhl Reports, Volume 2, Issue 6, pages i-ii
Dynamics of solvated electrons during femtosecond laser-induced plasma generation in water
Creators: name: Sakakibara, Noritaka
name: Ito, Tsuyohito
name: Terashima, Kazuo
name: Hakuta, Yukiya
name: Miura, Eisuke
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We studied the dynamics of solvated electrons in the early stage of plasma generation in water induced with an intense femtosecond laser pulse. According to the decay kinetics of solvated electrons, fast recombination process of solvated electrons (geminate recombination) occurred with a more prolonged lifetime (500 ps to 1 ns) than that observed in previous pulse photolysis studies (10-100 ps). This unusually longer lifetime is attributed to additional production of solvated electrons due to abundant free electrons generated with the laser-induced plasma, implying significant influence of free electrons on the dynamics of solvated electrons.
description: 24 pages, 5 figures
Signatures of the spatial extent of plastic events in the yielding transition in amorphous solids
Creators: name: Korchinski, Daniel
name: Ruscher, Céline
name: Rottler, Jörg
Publisher: name: arXiv
Year: 2021
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Amorphous solids are yield stress materials that flow when a sufficient load is applied. Their flow consists of periods of elastic loading interrupted by rapid stress drops, or avalanches, coming from microscopic rearrangements known as shear transformations (STs). Here we show that the spatial extent of avalanches in a steadily sheared amorphous solid has a profound effect on the distribution of local residual stresses $x$. We find that in this distribution, the most unstable sites are located in a system size dependent plateau. While the entrance into the plateau is set by the lower cutoff of the mechanical noise produced by individual STs, the departure from the usually assumed power-law (pseudogap) form $P(x) \sim x^θ$ comes from far field effects related to spatially extended rearrangements. Interestingly, we observe that the average value of weakest sites $\langle x_{min} \rangle$ is located in an intermediate power law regime between the pseudogap and the plateau regimes, whose exponent decreases with system size. Our findings imply a new scaling relation linking the exponents characterizing the avalanche size and residual stress distributions.
Kleinian groups of small Hausdorff dimension are classical Schottky groups I
Creators: name: Hou, Yong
Publisher: name: arXiv
Year: 2006
Subjects: subject: Geometric Topology (math.GT)
subject: Differential Geometry (math.DG)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: In this paper we prove that there exists a positive number $λ>0$, such that any 2-generated Kleinian groups with limit set of Hausdorff dimension $
description: appeared in Geometry&Topology 14, 2010
Percolation of the two-dimensional XY model in the flow representation
Creators: name: Wang, Bao-Zong
name: Hou, Pengcheng
name: Huang, Chun-Jiong
name: Deng, Youjin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We simulate the two-dimensional XY model in the flow representation by a worm-type algorithm, up to linear system size $L=4096$, and study the geometric properties of the flow configurations. As the coupling strength $K$ increases, we observe that the system undergoes a percolation transition $K_{\rm perc}$ from a disordered phase consisting of small clusters into an ordered phase containing a giant percolating cluster. Namely, in the low-temperature phase, there exhibits a long-ranged order regarding the flow connectivity, in contrast to the qusi-long-range order associated with spin properties. Near $K_{\rm perc}$, the scaling behavior of geometric observables is well described by the standard finite-size scaling ansatz for a second-order phase transition. The estimated percolation threshold $K_{\rm perc}=1.105 \, 3(4)$ is close to but obviously smaller than the Berezinskii-Kosterlitz-Thouless (BKT) transition point $K_{\rm BKT} = 1.119 \, 3(10)$, which is determined from the magnetic susceptibility and the superfluid density. Various interesting questions arise from these unconventional observations, and their solutions would shed lights on a variety of classical and quantum systems of BKT phase transitions.
title: Dagstuhl Reports, Table of Contents, Volume 2, Issue 7, 2012
Creators: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Publisher: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Year: 2013
Subjects: subject: Dagstuhl Reports
subject: Table of Contents
subject: Volume 2
subject: Issue 7
subject: 2012

description: Table of Contents, Frontmatter
description: Dagstuhl Reports, Volume 2, Issue 7, pages i-ii
SUSY Searches at LEP
Creators: name: Kraan, Aafke Christine
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Searches for SUSY particles have been performed in 3.6 fb$^{-1}$ e$^+$e$^-$ data collected by the LEP detectors at $\sqrt{s}$ between 90 GeV and 209 GeV. This talk reviews some of the relevant searches for SUSY particles at LEP. No excess of events is observed in any channel. Results are interpreted in the context of the MSSM.
description: 5 pages, 9 figures, conference contribution to Lake Louise Winter Institute 2005
The deterministic nature of conservative post-Newtonian accurate dynamics of compact binaries with leading order spin-orbit interaction
Creators: name: Gopakumar, Achamveedu
name: Koenigsdoerffer, Christian
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We formally show that the conservative second post-Newtonian (PN) accurate dynamics of spinning compact binaries moving in eccentric orbits, when spin effects are restricted to the leading order spin-orbit interaction cannot be chaotic for the following two distinct cases: (i) the binary consists of compact objects of arbitrary mass, where only one of them is spinning with an arbitrary spin and (ii) the binary consists of equal mass compact objects, having two arbitrary spins. We rest our arguments on the recent determination of PN accurate Keplerian-type parametric solutions to the above cases, indicating that the PN accurate dynamics is integrable in these two situations. We compare predictions of our case (i) with those from a numerical investigation of an equivalent scenario that observed chaos in the associated dynamics. We also present possible reasons for the discrepancies.
description: 5 pages; accepted by PRD
Gemeinsame Erklärung EKD/Altkath. Kirche
Creators: name: Engelhardt, Klaus
name: Kraft, Sigisbert
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 43 Nr. 2 (1994): Ökumenische Rundschau, Band 43, Heft 2
Migration of gap-opening planets in 3D stellar-irradiated accretion disks
Creators: name: Chrenko, Ondřej
name: Nesvorný, David
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Context. The origin of giant planets at moderate separations $\simeq$$1$$-$$10$ au is still not fully understood because numerical studies of Type II migration in protoplanetary disks often predict a decay of the semi-major axis that is too fast. According to recent 2D simulations, inward migration of a gap-opening planet can be slowed down or even reversed if the outer gap edge becomes heated by irradiation from the central star, and puffed up. Aims. Here we study how stellar irradiation reduces the disk-driven torque and affects migration in more realistic 3D disks. Methods. Using 3D hydrodynamic simulations with radiation transfer, we investigated the static torque acting on a single gap-opening planet embedded in a passively heated accretion disk. Results. Our simulations confirm that a temperature inversion is established at the irradiated outer gap edge and the local increase of the scale height reduces the magnitude of the negative outer Lindblad torque. However, the temperature excess is smaller than assumed in 2D simulations and the torque reduction only becomes prominent for specific parameters. For the viscosity $α=10^{-3}$, the total torque is reduced for planetary masses ranging from $0.1$ to $0.7$ Jupiter mass, with the strongest reduction being by a factor of $-0.17$ (implying outward migration) for a Saturn-mass planet. For a Jupiter-mass planet, the torque reduction becomes stronger with increasing $α$ (the torque is halved when $α=5\times10^{-3}$). Conclusions. We conclude that planets that open moderately wide and deep gaps are subject to the largest torque modifications and their Type II migration can be stalled due to gap edge illumination. We then argue that the torque reduction can help to stabilize the orbits of giant planets forming at $\gtrsim$$1$ au.
description: Accepted for publication in A&A, 17 pages, 15 figures
Carassius auratus
Creators: name: Angulo, Arturo
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Actinopterygii
Cypriniformes
Cyprinidae
Carassius
Carassius auratus

description: 6) * Carassius auratus (Linnaeus, 1758);
Cyprinidae.
Goldfish; Carpa Dorada, Pez Chino (Fig. 4C).
New record for the San Carlos River basin; previous records of the species in Costa Rican freshwaters were restricted to the Tárcoles River basin. New elevational record (29 m. a.s.l.); previous records of the species in Costa Rican freshwaters were restricted to 100–1779 m.a.s.l. Basis of the record: One specimen was captured in the río San Carlos, Santa Rita, Pital, San Carlos, Alajuela (10.70005, -84.19132), at 29 m. a.s.l., on June 2, 2019, by Oscar Sandoval.
description: Published as part of Angulo, Arturo, 2021, New records and range extensions to the Costa Rican freshwater fish fauna, with an updated checklist, pp. 1-72 in Zootaxa 5083 (1) on page 13, DOI: 10.11646/zootaxa.5083.1.1, http://zenodo.org/record/5800630
Soil development and forest productivity on naturally regenerating landslides on Vancouver Island
Creators: name: Straker, Justin
Publisher: name: University of British Columbia
Year: 2009

description: A chronosequence of five naturally regenerating landslide tracks on the west coast of Vancouver Island was studied, to identify processes of soil and vegetation recovery that might be adapted for use in slide rehabilitation programs. Information on soil physical and chemical properties (forest floor depth, coarse fragment content, texture, bulk density, pH, organic matter content, total N, extractable P, exchangeable K, Ca, and Mg) was collected on slide scour and deposit zones, and on equivalent slope positions on adjacent stable ground. Data on current stand attributes (stocking, height growth, and volume production) were collected in order to estimate the effects of landsliding on forest productivity. Two younger rehabilitated slide scars were included for study, to provide comparison between natural regeneration processes and those initiated by rehabilitation actions. Sixteen additional natural and rehabilitated landslides were included to extend the geographic range of the forest productivity component of the study. Sites ranged in age from 6 months to 100+ years since failure, and in current state from unvegetated to supporting mature conifer stands. Alteration of analyzed soil properties occurred rapidly as slide tracks revegetated. Although general trends follow those observed in other chronosequence work, the extent and rate of changes recorded in this study are attributed to red alder dominance of early successional phases on slide tracks. Although alder was a major component of regeneration on all slides studied, in all cases stand development followed predictable successional patterns towards eventual conversion to conifer species. Observed trends in soil properties stabilized or reversed under conifer dominance. Results of timber cruising indicate consistency in both alder and conifer volume production as slide scars age, with 20-year age classes being reliable predictors of stand volume. Reductions in conifer volumes on landslide tracks greater than 60 years of age were 50-60%, as compared to adjacent old-growth stands or projected second-growth stands. Based on findings from this research, a number of potential avenues for slide rehabilitation work are discussed. Particular emphasis is placed on management options for retaining alder as a component of regeneration, and to selection of conifer species for inclusion in slide planting programs.
title: Dagstuhl Reports, Table of Contents, Volume 2, Issue 8, 2012
Creators: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Publisher: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Year: 2013
Subjects: subject: Dagstuhl Reports
subject: Table of Contents
subject: Volume 2
subject: Issue 8
subject: 2012

description: Table of Contents, Frontmatter
description: Dagstuhl Reports, Volume 2, Issue 8, pages i-ii
Optimal model-based trajectory planning with static polygonal constraints
Creators: name: Martinsen, Andreas B.
name: Lekkas, Anastasios M.
name: Gros, Sebastien
Publisher: name: arXiv
Year: 2020
Subjects: subject: Systems and Control (eess.SY)
subject: Optimization and Control (math.OC)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics

description: The main contribution of this paper is a novel method for planning globally optimal trajectories for dynamical systems subject to polygonal constraints. The proposed method is a hybrid trajectory planning approach, which combines graph search, i.e. a discrete roadmap method, with convex optimization, i.e. a complete path method. Contrary to past approaches, which have focused on using simple obstacle approximations, or sub-optimal spatial discretizations, our approach is able to use the exact geometry of polygonal constraints in order to plan optimal trajectories. The performance and flexibility of the proposed method is evaluated via simulations by planning distance-optimal trajectories for a Dubins car model, as well as time-, distance- and energy-optimal trajectories for a marine vehicle.
Spectral asymptotics via the semiclassical Birkhoff normal form
Creators: name: Charles, Laurent
name: Ngoc, San Vu
Publisher: name: arXiv
Year: 2006
Subjects: subject: Spectral Theory (math.SP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 58J40, 58J50, 58K50, 47B35, 53D20

description: This article gives a simple treatment of the quantum Birkhoff normal form for semiclassical pseudo-differential operators with smooth coefficients. The normal form is applied to describe the discrete spectrum in a generalised non-degenerate potential well, yielding uniform estimates in the energy $E$. This permits a detailed study of the spectrum in various asymptotic regions of the parameters $(E,\h)$, and gives improvements and new proofs for many of the results in the field. In the completely resonant case we show that the pseudo-differential operator can be reduced to a Toeplitz operator on a reduced symplectic orbifold. Using this quantum reduction, new spectral asymptotics concerning the fine structure of eigenvalue clusters are proved. In the case of polynomial differential operators, a combinatorial trace formula is obtained.
description: 44 pages, 2 figures
title: Dagstuhl Reports, Table of Contents, Volume 2, Issue 9, 2012
Creators: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Publisher: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Year: 2013
Subjects: subject: Dagstuhl Reports
subject: Table of Contents
subject: Volume 2
subject: Issue 9
subject: 2012

description: Table of Contents, Frontmatter
description: Dagstuhl Reports, Volume 2, Issue 9, pages i-ii
Constraining msugra parameters with mu->e gamma and mu-e conversion in nuclei
Creators: name: Yaguna, Carlos E.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We show that, in the MSSM with msugra boundary conditions and seesaw induced neutrino masses, the values of BR(mu->e gamma) and the mu-e conversion rate in a nucleus determine the sign of mu and constrain tan beta in a model independent way.
description: 9 pages, 3 figures
Quantum Sensors for Microscopic Tunneling Systems
Creators: name: Bilmes, Alexander
name: Volosheniuk, Serhii
name: Brehm, Jan D.
name: Ustinov, Alexey V.
name: Lisenfeld, Jürgen
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The anomalous low-temperature properties of glasses arise from intrinsic excitable entities, so-called tunneling Two-Level-Systems (TLS), whose microscopic nature has been baffling solid-state physicists for decades. TLS have become particularly important for micro-fabricated quantum devices such as superconducting qubits, where they are a major source of decoherence. Here, we present a method to characterize individual TLS in virtually arbitrary materials deposited as thin-films. The material is used as the dielectric in a capacitor that shunts the Josephson junction of a superconducting qubit. In such a hybrid quantum system the qubit serves as an interface to detect and control individual TLS. We demonstrate spectroscopic measurements of TLS resonances, evaluate their coupling to applied strain and DC-electric fields, and find evidence of strong interaction between coherent TLS in the sample material. Our approach opens avenues for quantum material spectroscopy to investigate the structure of tunneling defects and to develop low-loss dielectrics that are urgently required for the advancement of superconducting quantum computers.
A contribution for an optimization of the polishing quality of stone slabs: simulation and experimental study using a single-head polishing machine
Creators: name: Barbosa, A. R.
name: Coelho, A.
name: Fernandes, J. C.
name: Amaral, P. M.
name: Rosa, L. G.
name: Pereira, J. C.
Publisher: name: International Conference on Stone and Concrete Machining (ICSCM)
Year: 2015
Subjects: Polishing; Pressure; Water Flow; Ornamental Stone; Gloss; Frankfurt Abrasives; Modelling

description: This paper describes recent research regarding: 1) the influence of the water flow and the pressure
in order to attain the best polishing in portuguese limestones; 2) the experimental validation of a
polishing simulator under development at Instituto Superior Tecnico (Lisbon). The research work
was carried out using slabs of calcareous stone Moleanos, from Portugal, and the polishing
sequence employed commercial Frankfurt-type abrasive tools applied for the last 3 stages of the
process in order to attain maximum surface gloss. The study was conducted with a single-head
laboratory-type polishing machine, where all test conditions are adequately monitored and
controlled. The polishing head contains 6 Frankfurt abrasives of the same grit size (320#, 400# and
5Extra). The surface quality was assessed, after each polishing stage, by means of a glossmeter.
In the end, it was possible to identify the optimum working parameters for each polishing stage.
The results obtained also show that indeed a correlation exists between experimental values of
gloss and the abrasion data given by the simulator.
description: International Conference on Stone and Concrete Machining (ICSCM), Vol 3 (2015)