cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Anomalous Microfluidic Phonons Induced by the Interplay of Hydrodynamic Screening and Incompressibility
Creators: name: Beatus, Tsevi
name: Bar-Ziv, Roy
name: Tlusty, Tsvi
Publisher: name: arXiv
Year: 2010
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We investigate the acoustic normal modes ("phonons") of a 1D microfluidic droplet crystal at the crossover between 2D flow and confined 1D plug flow. The unusual phonon spectra of the crystal, which arise from long-range hydrodynamic interactions, change anomalously under confinement. The boundaries induce weakening and screening of the interactions, but when approaching the 1D limit we measure a marked increase in the crystal sound velocity, a sign of interaction strengthening. This non-monotonous behavior of the phonon spectra is explained theoretically by the interplay of screening and plug flow.
description: http://link.aps.org/doi/10.1103/PhysRevLett.99.124502 http://www.weizmann.ac.il/complex/tlusty/papers/PhysRevLett2007.pdf
Chaotic Electron Motion in Macroscopic and Mesoscopic Antidot Lattices
Creators: name: Weiss, Dieter
name: Lütjering, Gerd
name: Richter, Klaus
Publisher: name: Universität Regensburg
Year: 1997
Subjects: subject: 530 Physik

description: Antidot arrays consisting of a lattice of nanometer scale holes etched through a two- dimensional electron gas display distinct resistance anomalies if the period of the array is much smaller than the electron mean free path. While in conventional conductors the electrons are deflected by randomly distributed scatterers, the situation is different in antidot arrays: here, the electrons predominantly collide with the periodically arranged antidots. Due to their geometry, antidot lattices can be considered as periodically repeated Sinai billiards, known for their classically chaotic electron dynamics. Here, electron transport through two different types of antidot lattices will be discussed: in macroscopic antidot lattices the extent of the array is much larger than the phase coherence length or the elastic mean free path of the electrons while in mesoscopic ones the electrons can travel ballistically from the ‘entrance’ to the ‘exit’ of the array.
31947: Maps from home
Creators: name: Project, Lockdown2020 and Beyond
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 479999
subject: Other language, communication and culture not elsewhere classified

description: I try to emulate my normal working pattern. Wake up at 6.00, then breakfast, then on my bike for a 90-minute ''commute'' to work. Start work at 9.00 and adhere to our child's school timetable - tea break at 10.50, lunch at 13.10.
Back to work at 14.00 finish 17.00-ish. Household chores then evening lockdown.
Lots of Zoom and Teams meetings, and lots of sunshine outside.
Supersymmetric SO(N) from a Planck-scale statistical theory
Creators: name: Allen, Roland E.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Several refinements are made in a theory which starts with a Planck-scale statistical picture and ends with supersymmetry and a coupling of fundamental fermions and bosons to SO(N) gauge fields. In particular, more satisfactory treatments are given for (1) the transformation from the initial Euclidean form of the path integral for fermionic fields to the usual Lorentzian form, (2) the corresponding transformation for bosonic fields (which is much less straightforward), (3) the transformation from an initial primitive supersymmetry to the final standard form (containing, e.g., scalar sfermions and their auxiliary fields), (4) the initial statistical picture, and (5) the transformation to an action which is invariant under general coordinate transformations.
description: 12 pages, proceedings of Beyond the Standard Models 2010 (Capetown, South Africa, February 2010); one point corrected
Integrability and Disorder in Mesoscopic Systems: Application to Orbital Magnetism
Creators: name: Richter, Klaus
name: Ullmo, Denis
name: Jalabert, Rodolfo A.
Publisher: name: Universität Regensburg
Year: 1996
Subjects: subject: 530 Physik

description: We present a semiclassical theory of weak disorder effects in small structures and apply it to the magnetic response of non-interacting electrons confined in integrable geometries. We discuss the various averaging procedures describing different experimental situations in terms of one- and two- particle Green functions. We demonstrate that the anomalously large zero-field susceptibility characteristic of clean integrable structures is only weakly suppressed by disorder. This damping depends on the ratio of the typical size of the structure with the two characteristic length scales describing the disorder (elastic mean-free- path and correlation length of the potential) in a power-law form for the experimentally relevant parameter region. We establish the comparison with the available experimental data and we extend the study of the interplay between disorder and integrability to finite magnetic fields.
Pushing BitTorrent Locality to the Limit
Creators: name: Blond, Stevens Le
name: Legout, Arnaud
name: Dabbous, Walid
Publisher: name: arXiv
Year: 2010
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Peer-to-peer (P2P) locality has recently raised a lot of interest in the community. Indeed, whereas P2P content distribution enables financial savings for the content providers, it dramatically increases the traffic on inter-ISP links. To solve this issue, the idea to keep a fraction of the P2P traffic local to each ISP was introduced a few years ago. Since then, P2P solutions exploiting locality have been introduced. However, several fundamental issues on locality still need to be explored. In particular, how far can we push locality, and what is, at the scale of the Internet, the reduction of traffic that can be achieved with locality? In this paper, we perform extensive experiments on a controlled environment with up to 10,000 BitTorrent clients to evaluate the impact of high locality on inter-ISP links traffic and peers download completion time. We introduce two simple mechanisms that make high locality possible in challenging scenarios and we show that we save up to several orders of magnitude inter-ISP traffic compared to traditional locality without adversely impacting peers download completion time. In addition, we crawled 214,443 torrents representing 6,113,224 unique peers spread among 9,605 ASes. We show that whereas the torrents we crawled generated 11.6 petabytes of inter-ISP traffic, our locality policy implemented for all torrents could have reduced the global inter-ISP traffic by up to 40%.
Como evaluar el pulido de las resinas compuestas (3).pdf
Creators: name: Shahverdi, Zahra
name: Taki, Hamed
Publisher: name: figshare
Year: 2025
Subjects: classificationCode: 320302
subject: Dental materials and equipment

description: CÓMO EVALUAR EL PULIDO DE RESINAS COMPUESTAS: UNA REVISIÓN BIBLIOGRÁFICA Objetivo: El objetivo de este trabajo es evaluar y comparar la eficacia de los diferentes métodos de medición del pulido de resinas compuestas. Para ello, nos enfocamos en aspectos como la rugosidad de la superficie, el brillo residual y la microestructura final de la restauración, que son los criterios de evaluación sobre los que centramos el estudio. Metodología: Se realizó una revisión de la literatura siguiendo las recomendaciones de PRISMA. Se buscó en bases de datos como PubMed, Scopus, Web of Science y Google Scholar desde el año 2016 hasta 2024 y en inglés y en español. Finalmente, se incluyeron un total de 16 artículos: estudios in vitro, revisiones sistemáticas y ensayos clínicos controlados aleatorios. Resultados: Los métodos más efectivos para evaluar cómo se llevó a cabo el pulido fueron aquellos que combinaban el análisis cuantitativo y el análisis cualitativo: la perfilometría óptica como método preciso para medir rugosidad (Ra < 0,2 µm); los glossmeters que permitirían estimar la retención de brillo tras 10.000 ciclos de cepillado; y el SEM que revelaba diferencias microestructurales producidas por protocolos. Los sistemas multietapa de pulido (discos de óxido de aluminio y pulidores de diamante) mostraron los mejores resultados. Las resinas nanorrellenas se mostraron con mejores resultados que las bulk-fill, especialmente con protocolos de evaluación combinados. Conclusiones: La eficacia del pulido no puede ser evaluada con un único método. Siempre resulta más interesante el uso combinado de perfilometría, reflectometría y SEM para obtener información de gran interés. Además, los sistemas multietapa, con resinas de tipo nanohíbrido o nanorrelleno eran los que permitían obtener las superficies más lisas, brillantes y duraderas. Se recomienda estandarizar los métodos de evaluación para introducir calidad clínica en las restauraciones. Palabras clave: abrasión mecánica; brillo superficial; glossometer; microscopía electrónica de barrido; nanorrelleno; perfilometría óptica; pulido de resinas compuestas; resina bulk-fill; rugosidad superficial.
Persistent Currents in the Ballistic Regime
Creators: name: Jalabert, Rodolfo A.
name: Richter, Klaus
name: Ullmo, Denis
Publisher: name: Universität Regensburg
Year: 1996
Subjects: subject: Equilibrium thermodynamics and statistical mechanics; Green's function methods; Heterojunctions; Magnetic phenomena; Semiconductor-semiconductor heterostructures; Semiconductor-semiconductor interfaces
subject: 530 Physik

description: We analyze the persistent current of non- interacting electrons in mesoscopic ballistic rings. We provide a semi-classical approach stressing the relevance of the underlying classical mechanics, and in particular of short periodic trajectories. In the limit of thin rings we recover previous theoretical results which we compare with recent measurements in the ballistic regime.
Using Wi-Fi channel state information (CSI) for human activity recognition and fall detection
Creators: name: Chowdhury, Tahmid Z.
Publisher: name: University of British Columbia
Year: 2018

description: Human Activity Recognition (HAR) serves a diverse range of human-centric applications in healthcare, smart homes, and security. Recently, Wi-Fi-based solutions have attracted a lot of attention. The underlying principle of these is the effect that human bodies have on nearby wireless signals. The presence of static objects such as ceilings and furniture cause reflections while dynamic objects such as humans result in additional propagation paths. These effects can be empirically observed by monitoring the Channel State Information (CSI) between two Wi-Fi devices. As different human postures induce different signal propagation paths, they result in unique CSI signatures, which can be mapped to corresponding human activities. However, there are some limitations in current state-of-the-art solutions. First, the performance of CSI-based HARs degrades in complex environments. To overcome this limitation, we propose Wi-HACS: Leveraging Wi-Fi for Human Activity Classification using Orthogonal Frequency Division Multiplexing (OFDM) Subcarriers. In our work, we propose a novel signal segmentation method to accurately determine the start and end of a human activity. We use several signal pre-processing and noise attenuation techniques, not commonly used in CSI-based HAR, to improve the features obtained from the amplitude and phase signals. We also propose novel features based on subcarrier correlations and autospectra of principal components. Our results indicate that Wi-HACS can outperform the state-of-the-art method in both precision and recall by 8% in simple environments, and by 14.8% in complex environments. The second limitation in existing CSI-HAR solutions is their poor performance in new/untrained environments. Since accurate Wi-Fi based fall detectors can greatly benefit the well-being of the elderly, we propose DeepFalls: Using Wi-Fi Spectrograms and Deep Convolutional Neural Nets for Fall Detection. We utilize the Hilbert Huang Transform spectrograms and train a Convolutional Neural Network to learn the features automatically. Our results show that DeepFalls can outperform the state-of-the-art RT-Fall in untrained environments with improvements in sensitivity and specificity by 11% and 15% respectively.
Land capability classification of Vernazza catchment, Cinque Terre National Park, Italy
Creators: name: Scopesi, C.
name: Olivari, S.
name: Firpo, M.
name: Scarpellini, P.
name: Pini, S.
name: Rellini, I.
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Plant Biology

description: Land capability classification is based on chemical and physical properties of soils for agricultural purposes. Objective of this study is the realization of the land capability map in the Vernazza catchment, an historically terraced landscape in the Cinque Terre National Park, recognized as a World Heritage site by UNESCO since 1997. A pedolandscape map with a descriptive legend, based on the soil-landscape paradigm for the prediction of soil classes and their spatial distribution, was produced. After, a land capability map was created by classifying the pedolandscape units to aid the sustainable territorial planning in the National Park. The results were plotted on a 1:4000 scale map with a descriptive legend. Land capability map is dominated by lands with severe limitation and only the 30% of the study area may be used for crops but it requires very careful management and conservation practice.
Abstract wave equations with acoustic boundary conditions
Creators: name: Mugnolo, Delio
Publisher: name: arXiv
Year: 2010
Subjects: subject: Analysis of PDEs (math.AP)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 47D05, 47H20, 35L20

description: We define an abstract setting to treat wave equations equipped with time-dependent acoustic boundary conditions on bounded domains of ${\bf R}^n$. We prove a well-posedness result and develop a spectral theory which also allows to prove a conjecture proposed in (Gal-Goldstein-Goldstein, J. Evol. Equations 3 (2004), 623-636). Concrete problems are also discussed.
description: 21 pages. A few minor bugs appearing in the journal version have been fixed
Stability of Schwarzschild-like solutions in f(R,G) gravity models
Creators: name: De Felice, Antonio
name: Suyama, Teruaki
name: Tanaka, Takahiro
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study linear metric perturbations around a spherically symmetric static spacetime for general f(R,G) theories, where R is the Ricci scalar and G is the Gauss-Bonnet term. We find that unless the determinant of the Hessian of f(R,G) is zero, even-type perturbations have a ghost for any multi-pole mode. In order for these theories to be plausible alternatives to General Relativity, the theory should satisfy the condition that the ghost is massive enough to effectively decouple from the other fields. We study the requirement on the form of f(R,G) which satisfies this condition. We also classify the number of propagating modes both for the odd-type and the even-type perturbations and derive the propagation speeds for each mode.
description: 15 pages, uses RevTeX4-1
Structural and geomorphological framework of the upper Maira Valley (Western Alps, Italy): the case study of the Gollone Landslide
Creators: name: Petroccia, A.
name: Bonasera, M.
name: Caso, F.
name: Nerone, S.
name: Morelli, M.
name: Bormioli, D.
name: Moletta, G.
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Science Policy
subject: Computational Biology

description: An interdisciplinary study has been adopted to investigate the upper Maira Valley (Western Alps, Italy). A geological map of an unmapped area, of about 12 km2, at scale 1:10.000, has been realized. The combination of field surveys, GIS database creation, aerial photo observation, local archival data consultation, geo-structural analysis and drillholes re-interpretation outlined a relationship between structures and landforms. A ductile and brittle deformation history with the definition of four discontinuity systems (F1-F4) has been detected. Where the fracturation is intense, rock-falls and topplings are triggered. In area associated with a homogeneous presence of weathered cover, debris flows were identified. The geo-structural pattern obtained from the surveys in the upper Maira Valley allowed characterizing detachment zones of the slope overlooking Acceglio town. The Gollone Landslide is an excellent case study to unravel the structural-morphological interaction and the kinematic evolution due to its framework.
Glacial geomorphology of the Strait of Magellan ice lobe, southernmost Patagonia, South America
Creators: name: Soteres, Rodrigo L.
name: Peltier, Carly
name: Kaplan, Michael R.
name: Sagredo, Esteban A.
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Neuroscience
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Ecology
subject: 20199 Astronomical and Space Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified

description: We present a geomorphic map of the landforms created by the Patagonian Ice Sheet during the local Last Glacial Maximum and perhaps prior glaciations in southernmost Patagonia. Building on prior work, the new mapping focuses in unprecedented detail on the right lateral and frontal landforms formed by the Strait of Magellan ice lobe. We produced the map using aerial orthophotography, Sentinel-2 and SPOT satellite imagery, ALOS PALSAR digital elevation model and fieldwork to ground-truth preliminary interpretations. We delineate at least five glacial events defined by a sequence of moraine drifts and associated glaciofluvial features. In contrast to previous studies, we propose the Magellan ice lobe extended ∼65 km farther, to the Primera Angostura peninsula, during the local Last Glacial Maximum. Our study provides a new context to establish a precise glacial chronology of the Magellan ice lobe during the last glacial cycle in the middle-high latitudes of the Southern Hemisphere.
The NumPy array: a structure for efficient numerical computation
Creators: name: Van Der Walt, Stefan
name: Colbert, S. Chris
name: Varoquaux, Gaël
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Software (cs.MS)
subject: FOS: Computer and information sciences

description: In the Python world, NumPy arrays are the standard representation for numerical data. Here, we show how these arrays enable efficient implementation of numerical computations in a high-level language. Overall, three techniques are applied to improve performance: vectorizing calculations, avoiding copying data in memory, and minimizing operation counts. We first present the NumPy array structure, then show how to use it for efficient computation, and finally how to share array data with other libraries.
Geoarchaeology and geomorphology of the Metaponto area, Ionian coastal belt, Italy
Creators: name: Gioia, Dario
name: Bavusi, Massimo
name: Di Leo, Paola
name: Giammatteo, Tonia
name: Schiattarella, Marcello
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Marine Biology
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Plant Biology

description: A 1:28,000-scale geoarchaeological map has been prepared for a large sector of the Ionian coastal belt of the Basilicata region, southern Italy, in order to investigate the relationships between the spatial distribution of archaeological sites of Greek settlement of Metapontum and the main landforms of this sector of the Bradano Foredeep. Archaeological investigation consists of an examination and a re-organisation of published data and new field surveys, which has allowed us to infer the relationships between landform elements and spatial distribution of about 1400 archaeological remnants of the Greek colony of Metapontum. Our results highlight a non-random distribution of the archaeological evidence and the strong influence of geomorphological features and processes on the settlement pattern.
Southwest extension of dextral transpression along the Burnsville fault into the Clyde 7.5-minute quadrangle, western North Carolina, USA
Creators: name: Langille, Jackie M.
name: Stachowicz, Liana
name: Stith, Felix
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: Cell Biology
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: 20199 Astronomical and Space Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Cancer

description: The Neoacadian Burnsville fault is a dextral transpressional structure exposed in western North Carolina. Bedrock geologic mapping in the Clyde 7.5-minute quadrangle documents the fault an additional ∼40 km southwest than previously mapped. Here it overprints the contact between the Ashe Metamorphic Suite (AMS) and Grenville basement and a portion of the Hayesville fault, both older Taconic structures. Neoacadian deformation was partitioned onto these pre-existing structures. The Burnsville fault intersects faults previously interpreted as the younger Alleghanian Fries and Chattahoochee faults. These do not offset the Burnsville fault here suggesting that they are Taconic and not the Fries and Chattahoochee faults. Our results suggest: (1) Grenville basement was thrust over the Cartoogechaye terrane, (2) the AMS was thrust over both by the Holland Mountain thrust, (3) all were then thrust over the Great Smoky Group by the Hayesville fault, and (4) these structures were later overprinted by Neoacadian dextral shear.
Seafloor Map of the Alghero Bay (Sardinia, Italy)
Creators: name: De Luca, Mario
name: Chaiallah, Abdesslam
name: Andreucci, Stefano
name: Cossu, Giulia
name: Santonastaso, Antonio
name: Sechi, Daniele
name: Stelletti, Myriam
name: Pascucci, Vincenzo
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Neuroscience
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Computational Biology

description: The Alghero Bay is a coastal area of high economic value because of the presence of one of the most popular beaches of Sardinia (San Giovanni, Maria Pia, Le Bombarde, Lazzaretto). The organisms living in the meadow of Posidonia oceanica, which densely cover the offshore areas of the bay, represent the most important source of sediments to these beaches. For this reason, a detailed mapping of the local seabed features and distribution of P. oceanica constitutes an important tool for the coastal managing of the area. The integrated use of several methodologies, such as Side Scan Sonar, Remote Operating Vehicle, Drone and direct sediment sampling has allowed us to realize a very detailed seafloor map of the Alghero Bay.
Static magnetic order of Sr$_{4}$A$_{2}$O$_{6}$Fe$_{2}$As$_{2}$ (A = Sc and V) revealed by local probes
Creators: name: Munevar, J.
name: Sanchez, D. R.
name: Alzamora, M.
name: Baggio-Saitovitch, E.
name: Carlo, J. P.
name: Goko, T.
name: Aczel, A. A.
name: Williams, T. J.
name: Luke, G. M.
name: Wen, Hai-Hu
name: Zhu, Xiyu
name: Han, Fei
name: Uemura, Y. J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Static magnetic order of quasi two-dimensional FeAs compounds Sr4A2O6-xFe2As2, with A = Sc and V, has been detected by 57Fe Moessbauer and muon spin relaxation (μSR) spectroscopies. The non-superconducting stoichiometric (x = 0) A = Sc system exhibits a static internal/hyperfine magnetic field both at the 57Fe and μ+ sites, indicating antiferromagnetic order of Fe moments below TN = 35 K with ~ 0.1 Bohr magneton per Fe at T = 2 K. The superconducting and oxygen deficient (x = 0.4) A = V system exhibits a static internal field only at the μ+ site below TN ~ 40 K, indicating static magnetic order of V moments co-existing with superconductivity without freezing of Fe moments. These results suggest that the 42622 FeAs systems belong to the same paradigm with the 1111 and 122 FeAs systems with respect to magnetic behavior of Fe moments.
description: 4 pages 4 figures: for information, contact tomo@lorentz.phys.columbia.edu
Geology of the Susa Shear Zone (Susa Valley, Western Alps)
Creators: name: Ghignone, Stefano
name: Gattiglio, Marco
name: Balestro, Gianni
name: Borghi, Alessandro
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biophysics
subject: Biochemistry
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Physiology
subject: FOS: Biological sciences
subject: Evolutionary Biology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: 20199 Astronomical and Space Sciences not elsewhere classified
subject: Inorganic Chemistry

description: The 1:10,000 scale geological map of the Susa Shear Zone (SSZ) in the inner sector of the Western Alps, aims to describe the geological setting and tectonic evolution of a first-order Alpine shear zone, which drove exhumation and juxtaposition of different oceanic and continental margin units (i.e. the blueschist-facies External Piedmont Zone in its hanging wall and the eclogite-facies Internal Piedmont Zone and Dora Maira Massif in its footwall). The SSZ corresponds to a tectonic mélange showing a block-in-matrix structure, wherein mylonitic calcschists embed blocks of different rock units. Geological mapping and structural analysis investigated overprinting relationships among shear planes and structures related to different deformation phases: they show that the SSZ evolved through two tectonic events, during which apparent reverse top-to-E shear planes were superposed by extensional top-to-W ones.
Enhanced and reduced atom number fluctuations in a BEC splitter
Creators: name: Maussang, Kenneth
name: Marti, G. Edward
name: Schneider, Tobias
name: Treutlein, Philipp
name: Li, Yun
name: Sinatra, Alice
name: Long, Romain
name: Estève, Jérôme
name: Reichel, Jakob
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We measure atom number statistics after splitting a gas of ultracold 87Rb atoms in a purely magnetic double-well potential created on an atom chip. Well below the critical temperature for Bose-Einstein condensation T_c, we observe reduced fluctuations down to -4.9dB below the atom shot noise level. Fluctuations rise to more than +3.8dB close to T_c, before reaching the shot noise level for higher temperatures. We use two-mode and classical field simulations to model these results. This allows us to confirm that the super-shot noise fluctuations directly originate from quantum statistics.
Quantitative determination of anisotropic magnetoelectric coupling in BiFeO$_{3}$-CoFe$_{2}$O$_{4}$ nanostructures
Creators: name: Oh, Yoon Seok
name: Crane, S.
name: Zheng, H.
name: Chu, Y. H.
name: Ramesh, R.
name: Kim, Kee Hoon
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The transverse and longitudinal magnetoelectric susceptibilities (MES) were quantitatively determined for (001) heteroepitaxial BiFeO$_{3}$-CoFe$_{2}$O$_{4}$ nanostructures. Both of these MES values were sharply enhanced at magnetic fields below 6 kOe and revealed asymmetric lineshapes with respect to the dc magnetic field, demonstrating the strain-induced magnetoelectric effect. The maximum transverse MES, which reached as high as $\sim$60 mV/cm Oe, was about five times larger than the longitudinal MES. This observation signifies that transverse magnetostriction of the CoFe$_{2}$O$_{4}$ nanopillars is enhanced more than the bulk value due to preferred magnetic domain alignment along the [001] direction coming from compressive, heteroepitaxial strain.
description: 8 pages, 3 figures
B polarization of cosmic background radiation from second-order scattering sources
Creators: name: Beneke, M.
name: Fidler, C.
name: Klingmuller, K.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: B-mode polarization of the cosmic background radiation is induced from purely scalar primordial sources at second order in perturbations of the homogeneous, isotropic universe. We calculate the B-mode angular power spectrum C_l^{BB} sourced by the second-order scattering term in the full second-order Boltzmann equations for the polarized radiation phase-space density, which have recently become available. We find that at l\approx 200 the second-order effect is comparable to the first-order effect for a tensor-to-scalar ratio of r=10^{-6}, and to about 2\cdot 10^{-4} at l\approx 1000. It is always negligible relative to the weak-lensing induced contribution.
description: 32 pages
Groundwater vulnerability of principal aquifers of the Campania region (southern Italy)
Creators: name: Tufano, Rita
name: Allocca, Vincenzo
name: Coda, Silvio
name: Cusano, Delia
name: Fusco, Francesco
name: Nicodemo, Federico
name: Pizzolante, Antonio
name: De Vita, Pantaleone
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Space Science
subject: Cell Biology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Marine Biology
subject: Computational Biology

description: The assessment of groundwater vulnerability is an important aspect of territorial planning aimed at the management and protection of groundwater quality. This topic is particularly relevant for the Campania region (southern Italy) due to the abundance of groundwater resources and the strong dependence on them of current economic, social and environmental settings. The region is characterized by complex geological, structural and hydrogeological frameworks which make challenging and innovative the assessment of groundwater vulnerability with SINTACS, a parametric method officially recognized by the Italian environmental agencies. In order to apply results obtained to current regional regulations, groundwater vulnerability was estimated for the 80 principal aquifers, hosting respective groundwater bodies, as recognized by the application of the Directive 2000/60/EC. Among principal results, the alluvial and limestone (karst) aquifers, which are the most productive of the region, show the highest groundwater vulnerability, even with spatially variable conditions depending on local hydrogeological features.
J-Class Abelian Semigroups of Matrices on C^n and Hypercyclicity
Creators: name: Ayadi, Adlene
name: Marzougui, Habib
Publisher: name: arXiv
Year: 2011
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 47A16

description: We give a characterization of hypercyclic finitely generated abelian semigroups of matrices on C^n using the extended limit sets (the J-sets). Moreover we construct for any n\geq 2 an abelian semigroup G of GL(n;C) generated by n + 1 diagonal matrices which is locally hypercyclic but not hypercyclic and such that JG(e_k) = C^n for every k = 1; : : : ; n, where (e_1; : : : ; e_n) is the canonical basis of C^n. This gives a negative answer to a question raised by Costakis and Manoussos.
description: 10 pages
Plant succession in the High Arctic : patterns & mechanisms
Creators: name: O'Kane, Katriina
Publisher: name: University of British Columbia
Year: 2018

description: Succession is defined as species change over time, and investigations into its nature over the past century have shown that it is a highly variable process, dependent on local environmental conditions and species pools. The High Arctic is a landscape currently experiencing rapid change, and the response of ecosystems to certain changes can be better predicted by understanding succession. However, little research has been conducted about succession in High Arctic environments. Consequently, in this thesis we investigate the patterns of and mechanisms behind plant succession at and around Alexandra Fiord, Ellesmere Island, in the Canadian High Arctic. In Chapter 2 we resurvey three glacial forelands originally surveyed 21 years ago to investigate patterns of primary succession. We find that species advance predictably in a directional manner towards the retreating glacial margin, however the rates and patterns of change are unique to each species, and species do not behave as well define communities. However, distinctly different species dominated on successional areas compared to older mature areas. In Chapter 3 we survey a topographically heterogeneous foreland to investigate the mechanisms driving primary succession. We find that micro-environmental influences played the most important role. Variation in substrate grain size explained the largest amount of variation in vegetation patterns. Other important influences included facilitation from moss and other vascular plant species, time since deglaciation, intrinsic life history traits, and distance to a seed source. In Chapter 4 we visit a site of secondary succession that has been recovering for 31 years. We find that this site was far more advanced in its recovery than the glacial forelands, but it had not yet reached a community composition similar to that of the surrounding mature tundra. Many successional species were the same at both the site of secondary succession and the site of primary succession. This work has provided new insights into the patterns and mechanisms of succession in the High Arctic, emphasizing the importance of understanding succession at a local scale, and providing testable hypothesis for further research.
A general solution to the Schrödinger-Poission equation for charged hard wall: Application to potential profile of an AlN/GaN barrier structure
Creators: name: Berland, Kristian
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: A general, system-independent formulation of the parabolic Schrödinger-Poisson equation is presented for a charged hard wall in the limit of complete screening by the ground state. It is solved numerically using iteration and asymptotic-boundary conditions. The solution gives a simple relation between the band bending and charge density at an interface. I further develop approximative analytical forms for the potential and wave function, based on properties of the exact solution. Specific tests of the validity of the assumptions leading to the general solution are made. The assumption of complete screening by the ground state is found be a limitation; however, the general solution still provides a fair approximate account of the potential when the bulk is doped. The general solution is further used in a simple model for the potential profile of an AlN/GaN barrier, and gives an approximation which compares well with the solution of the full Schrödinger-Poisson equation.
Records and sequences of records from random variables with a linear trend
Creators: name: Franke, Jasper
name: Wergen, Gregor
name: Krug, Joachim
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We consider records and sequences of records drawn from discrete time series of the form $X_{n}=Y_{n}+cn$, where the $Y_{n}$ are independent and identically distributed random variables and $c$ is a constant drift. For very small and very large drift velocities, we investigate the asymptotic behavior of the probability $p_n(c)$ of a record occurring in the $n$th step and the probability $P_N(c)$ that all $N$ entries are records, i.e. that $X_1 < X_2 < ... < X_N$. Our work is motivated by the analysis of temperature time series in climatology, and by the study of mutational pathways in evolutionary biology.
description: 21 pages, 7 figures
31957: Lockdown Freedom
Creators: name: Project, Lockdown2020 and Beyond
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 479999
subject: Other language, communication and culture not elsewhere classified

description: At first I didn't sleep. I woke dry mouthed and aching in the middle of night to check the news for some key piece of information I worried I missed. I worried about my family away from home. I worried about my family at home. I worried for my friends. I worried for the people I knew and the people I didn't. I worried about how the panic of strangers might make them behave. I worried about queuing, about how to ask for more space. I worried if there would be enough. Except, every time I've left my house there was enough. I've had strangers say more to me across the walls of their gardens and through their open kitchen windows than I've ever noticed before. I've had more greetings shouted at me from a distance than I know what to do with. I've noticed the moon. I've seen more art. I've read poetry. I've had discussions with strangers about more than the weather. I've watched my friends dance in the street. I've learnt to ask for more space and felt relief at voicing what I need. I've lost my phone and not noticed. I haven't spent money on things I don't need. I've argued about the influence of Jimi Hendrix until 2am. I've made mushroom risotto. I've painted. I've consulted on the cardboard Taj Mahal my young neighbour is presently erecting. I've watched my mum nail an improvised wooden rainbow to the gate like it really mattered. And then suddenly it did matter, because everyone walking their dogs or escaping their children, talked to us about it on their way past. I've started to accept the worry, the feelings of anxiety and confusion. I recognised I never could escape those before lockdown anyway. I think I might have found the freedom in captivity, in the people I already love and the things I already have. [The submission also pointed readers to 'Everything is Waiting for You' by David Whyte available at: https://www.davidwhyte.com/english-poetry#Everything]
Geomorphology of the urban area of Palermo (Italy)
Creators: name: Cappadonia, Chiara
name: Di Maggio, Cipriano
name: Agate, Mauro
name: Agnesi, Valerio
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: The results of a geomorphological study carried out in the urban area of Palermo are summarized in a thematic map. Field survey, analysis of aerial photographs and topographic maps, consultation of historical documents and maps, stratigraphic and topographic reconstruction from numerous wells and subsoil data, and bibliographic search were performed, in order to display the geomorphological changes produced by man over time in a densely populated area and to define the Anthropocene of the study area. Palermo town rises along large marine terrace surfaces cut by small river valleys and bordered by wide degraded and abandoned coastal cliffs. Over the last 2700 years, this area was affected by remarkable man-made changes to topographic surface and underground, exposing large areas of the city to hydraulic, sinkhole, and landslide risks, and increasing the levels of seismic susceptibility. In light of these results, the produced map is useful for urban planning studies.
Formica rufotruncicola WASMANN 1891
Creators: name: Seifert, Bernhard
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Formicidae
Formica
Formica rufotruncicola

description:  Formica rufotruncicola WASMANN, 1891 Formica rufa var. rufotruncicola WASMANN, 1891 [description of types by BETREM (1960)] This taxon was described from Panheel near Roermond / Netherlands on the basis of workers collected from a nest in April 1889. WASMANN (1891a) gave no description of structural characters. However, as WASMANN (1891b) reported on the mixed colouration of the worker population of exactly this nest, F. rufotruncicola WASMANN, 1891 is no nomen nudum. The data reported by BETREM (1960) on seven investigated syntype workers from NHM Maastricht indicate that it is a red colour variant of F. rufa.
description: Published as part of Seifert, Bernhard, 2021, A taxonomic revision of the Palaearctic members of the Formica rufa group (Hymenoptera: Formicidae) - the famous mound-building red wood ants, pp. 133-179 in Myrmecological News 31 on page 152, DOI: 10.25849/myrmecol.news_031:133, http://zenodo.org/record/5582216
description: {"references": ["WASMANN, E. 1891 a: Verzeichnis der Ameisen und Ameisengaste von Hollandisch Limburg. - Tijdschrift voor Entomologie 34: 39 - 64.", "BETREM, J. G. 1960: Formica truncorum F. niet inheems. - Entomologische Berichten 20: 130 - 134.", "WASMANN, E. 1891 b: Die zusammengesetzten Nester und gemischten Kolonien der Ameisen. - Aschendorff, MUnster, 278 pp."]}
Analysis and design enhancement of an interference fit in a slot/insert assembly condition
Creators: name: Swift, Robert
Publisher: name: University of British Columbia
Year: 2018

description: An interference fit is a relatively low-cost and effective method to lock inserts within component slots. The inserts are primarily held in place by friction. This method induces various stresses within both the slot and the insert. Due to the broad range of applications for interference fits and their geometry, the failures that are experienced are varied. Clearly, the failures depend on the in-service loads experienced, and how this loading is applied, however all are significantly influenced by the residual stresses which define the initial conditions of the component. This research aims to investigate the stresses within basic slot/insert scenarios in order to build a foundation of knowledge of this phenomenon. This knowledge will be developed further with the objective of developing an analytical tool which can be used to optimize the slot/insert design for a variety of applications. The outcome is to enable optimization of a slot/insert design to prevent unidentified failure modes without significantly compromising other performance aspects of the design, thus giving the user the ability to increase component life and system reliability.
Geomorphological analysis of drainage changes in the NE Apennines piedmont area: the case of the middle Tavo River bend (Abruzzo, Central Italy)
Creators: name: Carabella, Cristiano
name: Buccolini, Marcello
name: Galli, Luca
name: Miccadei, Enrico
name: Paglia, Giorgio
name: Piacentini, Tommaso
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: This work presents a tectonic geomorphology analysis of a river bend in the middle Tavo River valley, in the piedmont area of the NE Apennines (Abruzzo Region), between the eastern slope of the chain (Gran Sasso Massif) and the Adriatic coast. The main map (1:15,000 scale) was obtained through a morphometric, geological, and geomorphological analysis, and was composed of four sections including orography and hydrography at basin scale, main map at local scale, geomorphological cross-section and longitudinal profiles, and morphoneotectonic analysis. This study provides a basis for the recognition of morphostructural and morphotectonic features that control the drainage evolution of the Tavo River. Specifically, the study is focused on the Tavo-Saline basin characterized by possible capture processes, and the evolution of the watershed with the Pescara basin. The results from this study can contribute to the understanding of the evolution of the NE Apennines piedmont area since the Middle Pleistocene.
X-ray bursts and burst oscillations from the slowly spinning X-ray pulsar IGR J17480-2446 (Terzan 5)
Creators: name: Motta, S.
name: D'Aì, A.
name: Papitto, A.
name: Riggio, A.
name: Di Salvo, T.
name: Burderi, L.
name: Stella, T. Belloni L.
name: Iaria, R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The newly discovered 11 Hz accreting pulsar, IGR J17480-2446, located in the globular cluster Terzan 5, has shown several bursts with a recurrence time as short as few minutes. The source shows the shortest recurrence time ever observed from a neutron star. Here we present a study of the morphological, spectral and temporal properties of 107 of the bursts observed by the Rossi X-ray Timing Explorer. The recurrence time and the fluence of the bursts clearly anticorrelate with the increase of the persistent X-ray flux. The ratio between the energy generated by the accretion of mass and that liberated during bursts indicate that Helium is ignited in a Hydrogen rich layer. Therefore we conclude that all the bursts shown by IGR J17480-2446 are Type-I X-Ray bursts. Pulsations could be detected in all the brightest bursts and no drifts of the frequency are observed within 0.25 Hz of the spin frequency of the neutron star. These are also phase locked with respect to the pulsations observed during the persistent emission and no rise of the rms associated to the pulse frequency is observed during the burst. This behavior would favor a scenario where the flash is ignited within a region which is consistent to be as large as the neutron star surface.
description: 11 pages, 7 figures and 2 tables. Accepted by MNRAS 2011 February 06. Received 2011 January 07 ; in original form 2010 November 28