cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Atomic diffusion-induced polarization and superconductivity in topological insulator-based heterostructures
Creators: name: Wei, Xian-Kui
name: Jalil, Abdur Rehman
name: Rüßmann, Philipp
name: Ando, Yoichi
name: Grützmacher, Detlev
name: Blügel, Stefan
name: Mayer, Joachim
Publisher: name: Forschungzentrum Jülich
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: arXiv (2023). doi:10.48550/ARXIV.2311.16590
description: The proximity effect at a highly transparent interface of an s-wave superconductor (S) and a topological insulator (TI) provides a promising platform to create Majorana zero modes in artificially designed heterostructures. However, structural and chemical issues pertinent to such interfaces are poorly explored so far. Here, we report the discovery of Pd diffusion induced polarization at interfaces between superconductive Pd$_{1+x}$(Bi$_{0.4}$Te$_{0.6}$)$_2$ (xPBT, $0\le x \le 1$) and Pd-intercalated Bi$_2$Te$_3$ by using atomic-resolution scanning transmission electron microscopy. Our quantitative image analysis reveals that nanoscale lattice strain and QL polarity synergistically suppress and promote the Pd diffusion at the normal and parallel interfaces, formed between Te-Pd-Bi triple layers (TLs) and Te-Bi-Te-Bi-Te quintuple layers (QLs), respectively. Further, our first-principles calculations unveil that the superconductivity of xPBT phase and topological nature of Pd-intercalated Bi$_2$Te$_3$ phase are robust against the broken inversion symmetry. These findings point out the necessity of considering coexistence of electric polarization with superconductivity and topology in such S-TI systems.
description: Published by arXiv
Radio pulsar population synthesis with consistent flux measurements using simulation-based inference
Creators: name: Araujo, Celsa Pardo
name: Ronchi, Michele
name: Graber, Vanessa
name: Rea, Nanda
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The properties of the entire neutron star population can be inferred by modeling their evolution, from birth to the present, through pulsar population synthesis. This involves simulating a mock population, applying observational filters, and comparing the resulting sources to the limited subset of detected pulsars. We specifically focus on the magneto-rotational properties of Galactic isolated neutron stars and provide new insights into the intrinsic radio luminosity law by combining pulsar population synthesis with a simulation-based inference (SBI) technique called truncated sequential neural posterior estimation (TSNPE). We employ TSNPE to train a neural density estimator on simulated pulsar populations to approximate the posterior distribution of the underlying parameters. This technique efficiently explores the parameter space by concentrating on regions that are most likely to match the observed data thus allowing a significant reduction in training dataset size. We demonstrate the efficiency of TSNPE over standard neural posterior estimation (NPE), achieving robust inferences of magneto-rotational parameters consistent with previous studies using only around 4% of the simulations required by NPE approaches. Moreover, for the first time, we incorporate data from the Thousand Pulsar Array (TPA) program on MeerKAT, the largest unified sample of neutron stars with consistent fluxes measurement to date, to help constrain the stars' intrinsic radio luminosity. We find that adding flux information as an input to the neural network largely improves the constraints on the pulsars' radio luminosity, as well as improving the estimates on other input parameters.
description: 18 pages, 9 figures
Gonomyia (Paralipophleps) uncinata Alexander 1969
Creators: name: Armitage, Brian J.
name: Ríos González, Tomás A.
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Limoniidae
Gonomyia
Gonomyia uncinata

description: Gonomyia (Paralipophleps) uncinata Alexander, 1969
Original Genus: Gonomyia; Holotype: male; Type Locality: Panama, Colon Province, Fort Gulick; Description: Alexander, 1969e; Wing Reference: none; Hypopygium Reference: none; Panamanian Provinces: Colón; Regional Distribution: Panama.
description: Published as part of Armitage, Brian J. & Ríos González, Tomás A., 2019, The Diptera of Panama. I. Annotated catalog of the Tipulomorpha of Panama, pp. 1-30 in Insecta Mundi 712 on page 16, DOI: 10.5281/zenodo.3727017
A routine Carbon-11-PET workflow for in vivo measurements of plants: from a custom plant facility to data analysis
Creators: name: Chlubek, Antonia
name: Pflugfelder, Daniel
name: Metzner, Ralf
name: Huber, Gregor
name: Schurr, Ulrich
name: Hinz, Carsten
name: Koller, Robert
name: Scheins, Jürgen
name: Streun, Matthias
Publisher: name: Forschungzentrum Jülich
Year: 2023

description: 2nd Workshop Carbon Allocation in Plants, Versailles, France, 20 Nov 2023 - 21 Nov 2023
description: Positron Emission Tomography (PET) is a potent tool in plant sciences to measure allocation and transport processes in vivo. Especially the radioisotope Carbon-11 is of major interest as it can be administered as 11CO2 to leaves and used as a tracer to monitor the flow of photoassimilates within complex 3D structures such as roots.However, in the past, PET studies on plants have primarily been conducted on clinical or preclinical PET scanners. These scanners have the drawback of being horizontally orientated and typically not optimized for a plant-friendly environment, including suboptimal temperature, humidity and light conditions. Studies conducted on plant dedicated scanners have often lacked a full characterization, quantitative image reconstruction (including attenuation correction of individual samples) and data analysis pipeline.In this poster we present the establishment of a complete routine Carbon-11 PET pipeline for plants. This pipeline begins with a custom PET facility for plants, which comprises the production and administration of 11CO2, gas exchange measurement, and a climate chamber with a fully characterized and calibrated plant-dedicated PET scanner, the phenoPET. It also includes workflow protocols to measure up to four plants per day and ensures that data from individual plants in measuring series can be reliably and quantitatively compared. Additionally, the application of an in-house developed compartmental model for long-distance transport allows us to quantify and analyze flow velocities of the tracer and exchange rates with other tissues along the transport pathways, including error calculation.
Detecting substeps in the rotary motors of FoF1-ATP synthase by Hidden Markov Models
Creators: name: Zarrabi, N.
name: Dueser, M. G.
name: Reuter, R.
name: Dunn, S. D.
name: Wrachtrup, J.
name: Boersch, M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: FoF1-ATP synthase is the enzyme that provides the 'chemical energy currency' adenosine triphosphate, ATP, for living cells. The formation of ATP is accomplished by a stepwise internal rotation of subunits within the enzyme. We monitor subunit rotation by a single-molecule fluorescence resonance energy transfer (FRET) approach using two fluorophores specifically attached to the enzyme. To identify the stepsize of rotary movements by the motors of ATP synthase we simulated the confocal single-molecule FRET data of freely diffusing enzymes and developed a step finder algorithm based on 'Hidden Markov Models' (HMM). The HMM is able to find the proximity factors, P, for a three-level system and for a five-level system, and to unravel the dwell times of the simulated rotary movements. To identify the number of hidden states in the system, a likelihood parameter is calculated for the series of one-state to eight-state HMMs applied to each set of simulated data. Thereby, the basic prerequisites for the experimental single-molecule FRET data are defined that allow for discrimination between a 120 degree stepping mode or a 36 degree substep rotation mode for the proton-driven Fo motor of ATP synthase.
description: 12 pages, 5 figures
Διαχείριση Επισκεπτών στις Προστατευόμενες Περιοχές, Ελλάδα: Η Περίπτωση των Εθνικών Δρυμών Ολύμπου και Σαμαριάς, Συγκριτική Ανάλυση.:
Creators: name: Παπαβραμίδου, Δήμητρα Αθανασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Όγκος επισκεπτών
Εθνικός Δρυμός Ολύμπου
Εθνικός Δρυμός Σαμαριάς
Number οf visitors
National Park Olympus
National Park Samaria

description: Σκοπός αυτής της μεταπτυχιακής εργασίας είναι η σύγκριση δυο εθνικών δρυμών της Ελλάδος, του Ολύμπου και των Λευκών Ορέων – Σαμαριά, η μελέτη του μεγέθους των επισκεπτών, ο προσδιορισμός κοινών χαρακτηριστικών και κοινών συμπεριφορών, καθώς και η εύρεση της μελλοντικής τους τάσης. Αρχικά παρουσιάζεται το θεσμικό και νομικό περιβάλλον που υπάρχει στην Ελλάδα. Συνεχίζουμε με την παρουσίαση των δυο δρυμών και έπειτα εξετάζουμε τους λόγους για τους οποίους επιλέξαμε τους συγκεκριμένους δρυμούς. Ακολουθεί η ποσοτική ανάλυση δηλαδή η επεξεργασία πρώτα οικονομετρικού και κατόπιν μαθηματικού χαρακτήρα των δεδομένων του όγκου των επισκεπτών των δυο δρυμών.
description: Abstract
description: The purpose of this postgraduate thesis is the comparison of two national parks of Greece, mount Olympus and Lefka Ori- Samaria, taking in consideration the number of visitors for each park, defining the common traits and characteristics and eventually finding their future trend if possible. Initially there is an explanation of the institutional framework and the legal background concerning national parks in Greece. We proceed with a presentation of the two parks, examining and displaying the reasons for choosing these two in particular. The following part of our thesis consists of the quantitative analysis which includes elaborating and processing, firstly via econometrics and secondly via mathematics, the information concerning the number of visitors for each park.
Bullet pressure-cell design for neutron scattering experiments with horizontal magnetic fields and dilution temperatures
Creators: name: Fogh, Ellen
name: Giriat, Gaétan
name: Gaal, Richard
name: Testa, Luc
name: Pásztorová, Jana
name: Rønnow, Henrik M.
name: Prokhnenko, Oleksandr
name: Bartkowiak, Maciej
name: Pomjakushina, Ekaterina
name: Uwatoko, Yoshiya
name: Nojiri, Hiroyuki
name: Munakata, Koji
name: Kakurai, Kazuhisa
Publisher: name: arXiv
Year: 2024
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The simultaneous application of high magnetic fields and high pressures for controlling magnetic ground states is important for testing our understanding of many-body quantum theory. However, the implementation for neutron scattering experiments presents a technical challenge. To overcome this challenge we present an optimized pressure-cell design with a novel bullet shape, which is compatible with horizontal-field magnets, in particular the high-field magnet operating at the Helmholtz-Zentrum Berlin. The cell enabled neutron diffraction and spectroscopy measurements with the combination of three extreme conditions: high pressures, high magnetic fields, and dilution temperatures, simultaneously reaching 0.7 GPa, 25.9 T, and 200 mK. Our results demonstrate the utility of informed material choices and the efficiency of finite-element analysis for future pressure-cell designs to be used in combination with magnetic fields and dilution temperatures for neutron scattering purposes.
Ferrimagnetic 120$^\circ$ magnetic structure in Cu2OSO4
Creators: name: Favre, Virgile Yves
name: Tucker, Gregory S.
name: Ritter, Clemens
name: Sibille, Romain
name: Manuel, Pascal
name: Frontzek, Matthias D.
name: Kriener, Markus
name: Yang, Lin
name: Berger, Helmuth
name: Magrez, Arnaud
name: Casati, Nicola P. M.
name: Zivkovic, Ivica
name: Ronnow, Henrik M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report magnetic properties of a 3d$^9$ (Cu$^{2+}$) magnetic insulator Cu2OSO4 measured on both powder and single crystal. The magnetic atoms of this compound form layers, whose geometry can be described either as a system of chains coupled through dimers or as a Kagomé lattice where every 3rd spin is replaced by a dimer. Specific heat and DC-susceptibility show a magnetic transition at 20 K, which is also confirmed by neutron scattering. Magnetic entropy extracted from the specific heat data is consistent with a $S=1/2$ degree of freedom per Cu$^{2+}$, and so is the effective moment extracted from DC-susceptibility. The ground state has been identified by means of neutron diffraction on both powder and single crystal and corresponds to a $\sim120$ degree spin structure in which ferromagnetic intra-dimer alignment results in a net ferrimagnetic moment. No evidence is found for a change in lattice symmetry down to 2 K. Our results suggest that \sample \ represents a new type of model lattice with frustrated interactions where interplay between magnetic order, thermal and quantum fluctuations can be explored.
description: Published in Physical Review B
Gonomyia (Leiponeura) platyphallus Alexander 1971
Creators: name: Armitage, Brian J.
name: Ríos González, Tomás A.
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Limoniidae
Gonomyia
Gonomyia platyphallus

description: Gonomyia (Leiponeura) platyphallus Alexander, 1971
Original Genus: Gonomyia; Holotype: male; Type Locality: Panama, Coclé Province, El Valle de Anton; Description: Alexander, 1971b; Wing Reference: none; Hypopygium Reference: none; Panamanian Provinces: Coclé; Regional Distribution: Panama.
description: Published as part of Armitage, Brian J. & Ríos González, Tomás A., 2019, The Diptera of Panama. I. Annotated catalog of the Tipulomorpha of Panama, pp. 1-30 in Insecta Mundi 712 on page 15, DOI: 10.5281/zenodo.3727017
Gonomyia (Leiponeura) macswaini Alexander 1940
Creators: name: Armitage, Brian J.
name: Ríos González, Tomás A.
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Limoniidae
Gonomyia
Gonomyia macswaini

description: Gonomyia (Leiponeura) macswaini Alexander, 1940
Original Genus: Gonomyia; Holotype: male; Type Locality: Panama, Chiriqui Province, Potrerillos; Description: Alexander, 1940l; Wing Reference: none; Hypopygium Reference: none; Panamanian Provinces: Chiriquí; Regional Distribution: Costa Rica, Panama.
description: Published as part of Armitage, Brian J. & Ríos González, Tomás A., 2019, The Diptera of Panama. I. Annotated catalog of the Tipulomorpha of Panama, pp. 1-30 in Insecta Mundi 712 on page 15, DOI: 10.5281/zenodo.3727017
Line Searches in Swift X-ray Spectra
Creators: name: Hurkett, C. P.
name: Vaughan, S.
name: Osborne, J. P.
name: O'Brien, P. T.
name: Page, K. L.
name: Beardmore, A.
name: Godet, O.
name: Burrows, D. N.
name: Capalbi, M.
name: Evans, P.
name: Gehrels, N.
name: Goad, M. R.
name: Hill, J. E.
name: Kennea, J.
name: Mineo, T.
name: Perri, M.
name: Starling, R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Prior to the launch of the Swift mission several X-ray line detections were reported in Gamma Ray Burst afterglow spectra. To date, these pre-Swift era results have not been conclusively confirmed. The most contentious issue in this area is the choice of statistical method used to evaluate the significance of these features. In this paper we compare three different methods already extant in the literature for assessing the significance of possible line features and discuss their relative advantages and disadvantages. The methods are demonstrated by application to observations of 40 bursts from the archive of Swift XRT at early times (< few ks post trigger in the rest frame of the burst). Based on this thorough analysis we found no strong evidence for emission lines. For each of the three methods we have determined detection limits for emission line strengths in bursts with spectral parameters typical of the Swift-era sample. We also discuss the effects of the current calibration status on emission line detection.
description: Accepted by ApJ
Gonomyia (Leiponeura) extensa Alexander 1914
Creators: name: Armitage, Brian J.
name: Ríos González, Tomás A.
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Limoniidae
Gonomyia
Gonomyia extensa

description: Gonomyia (Leiponeura) extensa Alexander, 1914
Original Genus: Gonomyia; Holotype: male; Type Locality: Guyana, Bartica; Description: Alexander, 1914g; Wing Reference: none; Hypopygium Reference: none; Panamanian Provinces: Panama; Regional Distribution: Guyana, Panama, Trinidad.
description: Published as part of Armitage, Brian J. & Ríos González, Tomás A., 2019, The Diptera of Panama. I. Annotated catalog of the Tipulomorpha of Panama, pp. 1-30 in Insecta Mundi 712 on page 15, DOI: 10.5281/zenodo.3727017
Adversarial Machine Learning in Image Classification: A Survey Towards the Defender's Perspective
Creators: name: Machado, Gabriel Resende
name: Silva, Eugênio
name: Goldschmidt, Ronaldo Ribeiro
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Deep Learning algorithms have achieved the state-of-the-art performance for Image Classification and have been used even in security-critical applications, such as biometric recognition systems and self-driving cars. However, recent works have shown those algorithms, which can even surpass the human capabilities, are vulnerable to adversarial examples. In Computer Vision, adversarial examples are images containing subtle perturbations generated by malicious optimization algorithms in order to fool classifiers. As an attempt to mitigate these vulnerabilities, numerous countermeasures have been constantly proposed in literature. Nevertheless, devising an efficient defense mechanism has proven to be a difficult task, since many approaches have already shown to be ineffective to adaptive attackers. Thus, this self-containing paper aims to provide all readerships with a review of the latest research progress on Adversarial Machine Learning in Image Classification, however with a defender's perspective. Here, novel taxonomies for categorizing adversarial attacks and defenses are introduced and discussions about the existence of adversarial examples are provided. Further, in contrast to exisiting surveys, it is also given relevant guidance that should be taken into consideration by researchers when devising and evaluating defenses. Finally, based on the reviewed literature, it is discussed some promising paths for future research.
A 3-Dimensional study of the Local Environment of Bright IRAS Galaxies: The AGN/Starburst connection
Creators: name: Koulouridis, Elias
name: Chavushyan, Vahram
name: Plionis, Manolis
name: Krongold, Yair
name: Dultzin-Hacyan, Deborah
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a 3-dimensional study of the local ($\leq 100 h^{-1}$ kpc) and the large scale ($\leq$ 1 $h^{-1}$ Mpc) environment of Bright IRAS Galaxies (BIRGs). For this purpose we use 87 BIRGs located at high galactic latitudes (with 0.008$\leq z \leq$0.018) as well as a control sample of non-active galaxies having the same morphological, redshift and diameter size distributions as the corresponding BIRG sample. Using the Center for Astrophysics (CfA2) and Southern Sky Redshift Survey (SSRS) galaxy catalogues ($m_b\lesssim 15.5$)as well as our own spectroscopic observations ($m_b\lesssim19.0$) for a subsample of the original BIRG sample, we find that the fraction of BIRGs with a close neighbor is significantly higher than that of their control sample. Comparing with a related analysis of Sy1 and Sy2 galaxies of Koulouridis et al. (2006) we find that BIRGs have a similar environment as Sy2s, although the fraction of BIRGs with a bright close neighbor is even higher than that of Sy2 galaxies. An additional analysis of the relation between FIR colors and the type of activity of each BIRG shows a significant difference between the colors of strongly-interacting and non-interacting starbursts and a resemblance between the colors of non-interacting starbursts and Sy2s. Our results support the view where close interactions can drive molecular clouds towards the galactic center, triggering starburst activity and obscuring the nuclear activity. When the close neighbor moves away, starburst activity is reduced with the simultaneous appearance of an obscured (type 2) AGN. Finally, the complete disentanglement of the pair gives birth to an unobscured (type 1) AGN.
description: Accepted for publication in The Astrophysical Journal,10 pages, 4 figures
Gonomyia (Leiponeura) carsiostyla Alexander 1971
Creators: name: Armitage, Brian J.
name: Ríos González, Tomás A.
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Limoniidae
Gonomyia
Gonomyia carsiostyla

description: Gonomyia (Leiponeura) carsiostyla Alexander, 1971
Original Genus: Gonomyia; Holotype: male; Type Locality: Panama, Colon Province, Fort Gulick; Description: Alexander, 1971b; Wing Reference: none; Hypopygium Reference: none; Panamanian Provinces: Colón; Regional Distribution: Panama.
description: Published as part of Armitage, Brian J. & Ríos González, Tomás A., 2019, The Diptera of Panama. I. Annotated catalog of the Tipulomorpha of Panama, pp. 1-30 in Insecta Mundi 712 on page 15, DOI: 10.5281/zenodo.3727017
Stationary Black Holes as Holographs
Creators: name: Racz, Istvan
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Smooth spacetimes possessing a (global) one-parameter group of isometries and an associated Killing horizon in Einstein's theory of gravity are investigated. No assumption concerning the asymptotic structure is made, thereby, the selected spacetimes may be considered as generic distorted stationary black holes. First, spacetimes of arbitrary dimension, $n\geq 3$, with matter satisfying the dominant energy condition and allowing non-zero cosmological constant are investigated. In this part complete characterisation of the topology of the event horizon of ``distorted'' black holes is given. It is shown that the topology of the event horizon of ``distorted'' black holes is allowed to possess a much larger variety than that of the isolated black hole configurations. In the second part, 4-dimensional (non-degenerate) electrovac distorted black hole spacetimes are considered. It is shown that the spacetime geometry and the electromagnetic field are uniquely determined in the black hole region once the geometry of the bifurcation surface and one of the electromagnetic potentials are specified there. Conditions guaranteeing the same type of determinacy, in a neighbourhood of the event horizon, on the {\it domain of outer communication} side are also investigated. In particular, they are shown to be satisfied in the analytic case.
description: 31 pages, LaTeX; typos corrected, new references added, to appear in CQG
New commodity representations for multicommodity network flow problems: An application to the fixed-charge network design problem
Creators: name: Kazemi, Ahmad
name: Bodic, Pierre Le
name: Ernst, Andreas
name: Krishnamoorthy, Mohan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optimization and Control (math.OC)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 90B10, 90B06

description: When solving hard multicommodity network flow problems using an LP-based approach, the number of commodities is a driving factor in the speed at which the LP can be solved, as it is linear in the number of constraints and variables. The conventional approach to improve the solve time of the LP relaxation of a Mixed Integer Programming (MIP) model that encodes such an instance is to aggregate all commodities that have the same origin or the same destination. However, the bound of the resulting LP relaxation can significantly worsen, which tempers the efficiency of aggregating techniques. In this paper, we introduce the concept of partial aggregation of commodities that aggregates commodities over a subset of the network instead of the conventional aggregation over the entire underlying network. This offers a high level of control on the trade-off between size of the aggregated MIP model and quality of its LP bound. We apply the concept of partial aggregation to two different MIP models for the multicommodity network design problem. Our computational study on benchmark instances confirms that the trade-off between solve time and LP bound can be controlled by the level of aggregation, and that choosing a good trade-off can allow us to solve the original large-scale problems faster than without aggregation or with full aggregation.
description: 27 pages, 12 figures
Gonomyia (Leiponeura) batesi Alexander 1945
Creators: name: Armitage, Brian J.
name: Ríos González, Tomás A.
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Limoniidae
Gonomyia
Gonomyia batesi

description: Gonomyia (Leiponeura) batesi Alexander, 1945
Original Genus: Gonomyia; Holotype: male; Type Locality: Panama, Panama Province, Canal Zone, Barro Colorado Island; Description: Alexander, 1945y; Wing Reference: none; Hypopygium Reference: Alexander, 1945y; Panamanian Provinces: Panama; Regional Distribution: Panama.
description: Published as part of Armitage, Brian J. & Ríos González, Tomás A., 2019, The Diptera of Panama. I. Annotated catalog of the Tipulomorpha of Panama, pp. 1-30 in Insecta Mundi 712 on page 15, DOI: 10.5281/zenodo.3727017
Effects of Magnetic Coupling on Radiation from Accretion Disc around a Kerr Black Hole
Creators: name: Gan, Zhao-Ming
name: Wang, Ding-Xiong
name: Li, Yang
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The effects of magnetic coupling (MC) process on the inner edge of the disc are discussed in detail. It is shown that the inner edge can deviate from the innermost stable circular orbit (ISCO) due to the magnetic transfer of energy and angular momentum between a Kerr black hole (BH) and its surrounding accretion disc. It turns out that the inner edge could move inward and outward for the BH spin $a_{*}$ being greater and less than 0.3594, respectively. The MC effects on disc radiation are discussed based on the displaced inner edge. A very steep emissivity can be provided by the MC process, which is consistent with the observation of MCG-6-30-15. In addition, the BH spins of GRO J1655-40 and GRS 1915+105 are detected by X-ray continuum fitting based on this model.
description: 7 pages, 7 figures. Accepted by MNRAS
Monte Carlo simulations of geosynchrotron radio emission from CORSIKA-simulated air showers
Creators: name: Huege, T.
name: Ulrich, R.
name: Engel, R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present simulations performed with REAS2, a new Monte Carlo code for the calculation of geosynchrotron radio emission from extensive air showers. The code uses thoroughly tested time-domain radio emission routines in conjunction with a realistic air shower model based on per-shower multi-dimensional CORSIKA-generated histograms. We assess in detail how the transition from simpler, parametrised, to realistic, CORSIKA-based particle distributions affects the predicted radio emission from a typical 10^17 eV air shower. The effects of eliminating a previously needed free parameter and adopting realistic electron to positron ratios are also discussed. Compared with earlier calculations based on parametrised showers, REAS2 simulations predict slightly weaker and in some cases narrower pulses. In addition, a pronounced east-west versus north-south asymmetry arises in the emission pattern, and the radio pulses become generally unipolar. Finally, we demonstrate how REAS2 can be used to study radio pulse shapes and their relation to shower characteristics such as the longitudinal air shower development.
description: accepted for publication in Astroparticle Physics, minor revision of v1, 25 pages
Οι Προσδιοριστικοί Παράγοντες των Άμεσων Ξένων Επενδύσεων Μεταπολεμικά στην Πορτογαλία:
Creators: name: Τεζεψίδου, Εύα Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Προσδιοριστικοί παράγοντες
Άμεσες ξένες επενδύσεις
Πορτογαλία
Determinants
Foreign direct investments
Portugal

description: Σκοπός της διατριβής ήταν η μελέτη των προσδιοριστικών παραγόντων των άμεσων ξένων επενδύσεων μεταπολεμικά στην Πορτογαλία. Αρχικά έγινε αναφορά σε κάποια εισαγωγικά και θεωρητικά στοιχεία σχετικά με τις άμεσες ξένες επενδύσεις όπως ο ορισμός, οι μορφές και οι τύποι, οι επιπτώσεις τους αλλά και το παγκόσμιο ιστορικό τους. Ακόμα παρουσιάστηκαν οι θεωρίες των άμεσων ξένων επενδύσεων που αναπτύχθηκαν κατά καιρούς και αναλύθηκαν οι προσδιοριστικοί παράγοντες που προκύπτουν μέσα από αυτές και φαίνεται να τις επηρεάζουν. Στην συνέχεια επικεντρωθήκαμε στην Πορτογαλία και πιο συγκεκριμένα στην πορεία των άμεσων ξένων επενδύσεων εκεί από το τέλος του Β’ Παγκοσμίου πολέμου και μετά καθώς και στις διάφορες πολιτικές που ακολούθησε η χώρα με σκοπό την προσέλκυση των ξένων επενδυτών. Επιπλέον, μέσα από μία εμπειρική μελέτη που έγινε, προσπαθήσαμε να προσδιορίσουμε τους βασικότερους παράγοντες στους οποίους οφείλεται η δημιουργία άμεσων ξένων επενδύσεων στην Πορτογαλία και καταλήξαμε στο συμπέρασμα πως τόσο το μέγεθος αγοράς όσο και το χαμηλό κόστος εργασίας είναι οι δύο βασικοί παράγοντες που προσελκύουν τις άμεσες ξένες επενδύσεις στην χώρα με τον παράγοντα μέγεθος αγοράς να υπερισχύει.
description: The aim of the present thesis was the study of the determinants of foreign direct investments after the Second World War in Portugal. Firstly, we mentioned some introductory and theoretical elements relative to foreign direct investment such as the definition, forms and types, the effects and also their world-wide background. Furthermore, we presented the theories of foreign direct investments that have been developed over time and we analyzed the determinants that ensue from these theories and seem to influence them. Then we examined Portugal and particular the course of foreign direct investments in this country after the end of the Second World War and also the various politics that followed Portugal with the purpose to attract the foreign investors. Moreover, through an investigation, we tried to identify the basic determinants for the creation of foreign direct investments in Portugal and we concluded that both the size of the market and the low wages are the two basic determinants that attract foreign direct investments to the country with the determinant size of the market to be more valued.
Evidence for an entropy bound from fundamentally discrete gravity
Creators: name: Rideout, D.
name: Zohren, S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The various entropy bounds that exist in the literature suggest that spacetime is fundamentally discrete, and hint at an underlying relationship between geometry and "information". The foundation of this relationship is yet to be uncovered, but should manifest itself in a theory of quantum gravity. We present a measure for the maximal entropy of spherically symmetric spacelike regions within the causal set approach to quantum gravity. In terms of the proposal, a bound for the entropy contained in this region can be derived from a counting of potential "degrees of freedom" associated to the Cauchy horizon of its future domain of dependence. For different spherically symmetric spacelike regions in Minkowski spacetime of arbitrary dimension, we show that this proposal leads, in the continuum approximation, to Susskind's well-known spherical entropy bound.
description: 25 pages, 9 figures. Comment on Bekenstein bound added and smaller corrections. To be published in Class.Quant.Grav
Gonomyia (Gonomyia) subunicolor Alexander 1948
Creators: name: Armitage, Brian J.
name: Ríos González, Tomás A.
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Limoniidae
Gonomyia
Gonomyia subunicolor

description: Gonomyia (Gonomyia) subunicolor Alexander, 1948
Original Genus: Gonomyia; Holotype: male; Type Locality: Panama, Coclé Province, Cerro Pena; Description: Alexander, 1948k; Wing Reference: none; Hypopygium Reference: none; Panamanian Provinces: Coclé; Regional Distribution: Panama.
description: Published as part of Armitage, Brian J. & Ríos González, Tomás A., 2019, The Diptera of Panama. I. Annotated catalog of the Tipulomorpha of Panama, pp. 1-30 in Insecta Mundi 712 on page 15, DOI: 10.5281/zenodo.3727017
D4.3 Discussion paper on the political economy of trade regimes
Creators: name: Häberli, Christian
Publisher: name: Zenodo
Year: 2024

description: This discussion paper focuses on the political economy of agrifood trade, drawing from the 15 MATS case studies (CS). It highlights commonalities and differences in the light of relevant SDG, the EU Green Deal, other Standards and Regulations, and of Actor/Stakeholder inclusiveness in each CS. A grid of trade and other policies and instruments along these parameters shows their expected sustainability results, positive and negative, across the CS.

Human and natural resources availability, market signals, societal demands, cultural priorities, and sustainability concerns act as the prime motivators for operator decisions. Trade policy instruments are among the most important government tools, acting at the end of the food value chains (VC) ‘from farm to fork’. These instruments, in turn, shape the policy framework for inputs, energy, production, processing, investment, wholesale and retail trading locally, and for exports, marketing, consumption, and recycling. Notwithstanding the probability of unintended (unexpected) consequences, one would hope that the collective costs of not making the framework effective would outweigh the smaller short-term gains of gaming this process.

We find that ‘more sustainable agricultural trade’ can result from what could also be called ‘smarter’ (or ‘greener’), and enforceable, policymaking. Clearly, the success of these policies in delivering these benefits will depend not only on their effective implementation, but also on independent, in-built ex ante/ex post monitoring, impact assessment, and adaptation where necessary – especially for SMEs, women, and the more vulnerable market participants. Public engagement and inclusiveness will also be crucial to achieve the desired outcomes. Making agricultural trade more sustainable requires a specific combination of nudging, incentives, mandatory and voluntary standards, and import prescriptions. The progressive implementation of some of the new European Green Deal (and FF55) regulatory instruments can provide a useful impetus as well, together with foreign policies and development policy changes introduced by the European Commission and Member States. This could go for all MATS partner countries, in appropriate ways, and provided that development-friendly European regulations can be expected to bring about tangible social, economic, and environmental benefits for all.
Critical behavior of repulsive linear $k$-mers on triangular lattices
Creators: name: Pasinetti, P. M.
name: Roma, F.
name: Riccardo, J. L.
name: Ramirez-Pastor, A. J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Monte Carlo (MC) simulations and finite-size scaling analysis have been carried out to study the critical behavior in a submonolayer two-dimensional gas of repulsive linear $k$-mers on a triangular lattice at coverage $k/(2k+1)$. A low-temperature ordered phase, characterized by a repetition of alternating files of adsorbed $k$-mers separated by $k+1$ adjacent empty sites, is separated from the disordered state by a order-disorder phase transition occurring at a finite critical temperature, $T_c$. The MC technique was combined with the recently reported Free Energy Minimization Criterion Approach (FEMCA), [F. Romá et al., Phys. Rev. B, 68, 205407, (2003)], to predict the dependence of the critical temperature of the order-disorder transformation. The dependence on $k$ of the transition temperature, $T_c(k)$, observed in MC is in qualitative agreement with FEMCA. In addition, an accurate determination of the critical exponents has been obtained for adsorbate sizes ranging between $k=1$ and $k=3$. For $k>1$, the results reveal that the system does not belong to the universality class of the two-dimensional Potts model with $q=3$ ($k=1$, monomers). Based on symmetry concepts, we suggested that the behavior observed for $k=1, 2$ and 3 could be generalized to include larger particle sizes ($k \geq 2$).
description: 17 pages, 13 figures
Reggeized quark -- Reggeized quark -- gluon effective vertex
Creators: name: Bogdan, A. V.
name: Grabovsky, A. V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: This paper is devoted to the calculation of the Reggeized quark-Reggeized quark-gluon effective vertex in perturbative QCD in the next-to-leading order. The case of QCD with massless quarks is considered and the correction is obtained in the D->4 limit. This vertex appears in the quark Reggeization theory, which next-to-leading order extension is now under construction.
description: 20 pages, 3 figures, elsart documetclass
High order non-unitary split-step decomposition of unitary operators
Creators: name: Prosen, Tomaz
name: Pizorn, Iztok
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a high order numerical decomposition of exponentials of hermitean operators in terms of a product of exponentials of simple terms, following an idea which has been pioneered by M. Suzuki, however implementing it for complex coefficients. We outline a convenient fourth order formula which can be written compactly for arbitrary number of noncommuting terms in the Hamiltonian and which is superiour to the optimal formula with real coefficients, both in complexity and accuracy. We show asymptotic stability of our method for sufficiently small time step and demonstrate its efficiency and accuracy in different numerical models.
description: 10 pages, 4 figures (5 eps files) Submitted to J. of Phys. A: Math. Gen
Positive solutions for the Robin $p$-Laplacian plus an indefinite potential
Creators: name: Papageorgiou, Nikolaos S.
name: Rădulescu, Vicenţiu D.
name: Repovš, Dušan D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35J20, 35J60

description: We consider a nonlinear elliptic equation driven by the Robin $p$-Laplacian plus an indefinite potential. In the reaction we have the competing effects of a strictly $(p-1)$-sublinear parametric term and of a $(p-1)$-linear and nonuniformly nonresonant term. We study the set of positive solutions as the parameter $λ>0$ varies. We prove a bifurcation-type result for large values of the positive parameter $λ$. Also, we show that for all admissible $λ>0$, the problem has a smallest positive solution $\overline{u}_λ$ and we study the monotonicity and continuity properties of the map $λ\mapsto\overline{u}_λ$.
Δρομολόγηση παράλληλων εργασιών σε ένα σύστημα Grid: μοντελοποίηση, προσομοίωση και ανάλυση της απόδοσης
Creators: name: Σαλαμπάση, Σταυρούλα Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Προσομοίωση
Πλέγμα
Απόδοση
Simulation
Grid
Performance

description: Στην παρούσα εργασία μελετάται η αποτελεσματικότητα διαφορετικών πολιτικών δρομολόγησης εργασιών σε ένα σύστημα grid με παράλληλες εργασίες. Στόχος της είναι η καταγραφή της επίδρασης της κάθε πολιτικής δρομολόγησης στην απόδοση του συστήματος και η σύγκριση του συνόλου των πολιτικών για την εύρεση της αποδοτικότερης. Οι πολιτικές δρομολόγησης των εργασιών συγκρίνονται ως προς τον συνολικό χρόνο προσομοίωσης, την μέση χρησιμοποίηση, τον μέσο και τον μέγιστο χρόνο απόκρισης και τον μέσο πλήθος εργασιών στο σύστημα. Τελικός σκοπός είναι η μείωση του χρόνου προσομοίωσης και του μέσου χρόνου παραμονής των εργασιών στο σύστημα, η αύξηση του μέσου αριθμού εργασιών στο σύστημα και η παρόμοια χρησιμοποίηση όλων των επεξεργαστών ώστε να γίνεται καταλληλότερη διανομή του φόρτου εργασίας στους επεξεργαστές και να μην επιβαρύνονται ιδιαίτερα μόνο κάποιοι από αυτούς.
description: In this study we examine the effectiveness of different job scheduling policies on a grid system where jobs are made of parallel tasks. Its purpose is to record the impact of scheduling policy on system performance, and to compare the policies in terms of efficiency. Job scheduling policies are compared by the total simulation time, the mean utilization, mean and maximum response time and the average number of jobs in the system. The goal is to reduce simulation time and the average waiting time of the job in the system. Also beneficial would be sharing out the load across all the processors and therefore having uniform utilization.
A Digital Tool to Design Structurally Feasible Hemispherical Masonry Domes Composed of Interlocking Blocks
Creators: name: Mousavian, Elham
name: Casapulla, Claudia
Publisher: name: Zenodo
Year: 2021

description: A Digital Tool to Design Structurally Feasible Hemispherical Masonry Domes Composed of Interlocking Blocks, Thirteenth International Conference on Computational Structures Technology, Sitges, Spain
Antenna-Coupled TES Bolometers for CMB Polarimetry
Creators: name: Kuo, C. L.
name: Bock, J. J.
name: Chattopadthyay, G.
name: Goldin, A.
name: Golwala, S.
name: Holmes, W.
name: Irwin, K.
name: Kenyon, M.
name: Lange, A. E.
name: LeDuc, H. G.
name: Rossinot, P.
name: Vayonakis, A.
name: Wang, G.
name: Yun, M.
name: Zmuidzinas, J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have developed a completely lithographic antenna-coupled bolometer for CMB polarimetry. The necessary components of a millimeter wave radiometer -- a beam forming element, a band defining filter, and the TES detectors -- are fabricated on a silicon chip with photolithography. The densely populated antennas allow a very efficient use of the focal plane area. We have fabricated and characterized a series of prototype devices. We find that their properties, including the frequency and angular responses, are in good agreement with the theoretical expectations. The devices are undergoing optimization for upcoming CMB experiments.
description: SPIE, Orlando, 2006
Gonomyia (Gonomyia) stylacantha Alexander 1969
Creators: name: Armitage, Brian J.
name: Ríos González, Tomás A.
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Limoniidae
Gonomyia
Gonomyia stylacantha

description: Gonomyia (Gonomyia) stylacantha Alexander, 1969
Original Genus: Gonomyia; Holotype: male; Type Locality: Panama, Coclé Province, El Valle de Anton; Description: Alexander, 1969e; Wing Reference: none; Hypopygium Reference: none; Panamanian Provinces: Coclé; Regional Distribution: Panama.
description: Published as part of Armitage, Brian J. & Ríos González, Tomás A., 2019, The Diptera of Panama. I. Annotated catalog of the Tipulomorpha of Panama, pp. 1-30 in Insecta Mundi 712 on page 15, DOI: 10.5281/zenodo.3727017
Ultracold atoms in radio-frequency-dressed potentials beyond the rotating wave approximation
Creators: name: Hofferberth, S.
name: Fischer, B.
name: Schumm, T.
name: Schmiedmayer, J.
name: Lesanovsky, I.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study dressed Bose-Einstein condensates in an atom chip radio-frequency trap. We show that in this system sufficiently strong dressing can be achieved to cause the widely used rotating wave approximation (RWA) to break down. We present a full calculation of the atom - field coupling which shows that the non-RWA contributions quantitatively alter the shape of the emerging dressed adiabatic potentials. The non-RWA contributions furthermore lead to additional allowed transitions between dressed levels. We use RF spectroscopy of Bose-Einstein condensates trapped in the dressed state potentials to directly observe the transition from the RWA to the beyond-RWA regime.
description: 6 pages, 4 figures
The neutrino mass bound from WMAP-3, the baryon acoustic peak, the SNLS supernovae and the Lyman-alpha forest
Creators: name: Goobar, Ariel
name: Hannestad, Steen
name: Mortsell, Edvard
name: Tu, Huitzu
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We have studied bounds on the neutrino mass using new data from the WMAP 3 year data, the Sloan Digital Sky Survey measurement of the baryon acoustic peak, the Type Ia supernovae from SNLS, and the Lyman-alpha forest. We find that even in the most general models with a running spectral index where the number of neutrinos and the dark energy equation of state are allowed to vary, the 95% C.L. bound on the sum of neutrino masses is sum m_nu < 0.62 eV (95% C.L.), a bound which we believe to be robust. In the more often used constrained analysis with N_nu =3, w = -1, and alpha_s = 0, we find a bound of 0.48 eV without using the Lyman-alpha data. If Lyman-alpha data is used, the bound shrinks to \sum m_nu < 0.2-0.4 eV (95% C.L.), depending strongly on the Lyman-alpha analysis used.
description: 13 pages, 3 figures, matches version to appear in JCAP. The paper now includes an analysis with the WMAP-3 data. It also includes an improved analysis of the SDSS Baryon Acoustic Oscillation data, providing a new analytic fitting formula for the inclusion of non-zero neutrino masses in the BAO data analysis
Quantitative analysis of the co-publications of Ukrainian scientists with the Nobel laureates 1994-2018 in Science
Creators: name: Nazarovets, Serhii
Publisher: name: arXiv
Year: 2020
Subjects: subject: Digital Libraries (cs.DL)
subject: FOS: Computer and information sciences

description: The Nobel Prize is awarded annually for outstanding scientific discoveries and inventions. Most scientific papers today are co-authored by a large number of researchers. However, very few scientists can receive the Nobel Prize according to the Statutes of the Nobel Foundation. An analysis of the co-authorship of the Nobel laureates will make it possible to identify employees of Ukrainian institutions who have collaborated with leading scientists of the world, whose scientific works were noted by Nobel. For the development of science in Ukraine it is important to study the successful experience of cooperation of domestic research institutions with leading world scientists and research centers, because international scientific collaboration facilitates the process of acquiring new knowledge, promotes mutual enrichment of ideas, efficient use of resources and expands opportunities for further use of research results. Using the Scopus database, selected publications of Nobel Prize winners, which were written in collaboration with scientists who worked in Ukrainian institutions. The data obtained indicate that the employees of scientific institutions of Ukraine published very few papers in collaborations with Nobel Prize winners of 1994-2018 in comparison with employees of institutions in leading countries in publishing activity.