cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Estimation of short-run and long-run food import demand elasticities in Sri Lanka: The bound testing approach
Creators: name: Naduni Nayanathara,
name: Gayanthi A. Ilangarathna
name: Shashika D. Rathnayaka
name: Jeevika Weerahewa
Publisher: name: Unknown
Year: 2023
Subjects: subject: Agricultural and Food Policy
subject: Demand and Price Analysis
subject: Bound testing, food trade, Import demand elasticities, Sri Lanka, Unrestricted Error Correction Model

description: The elasticities of import demand are required to ascertain the direction and magnitude of the effects of various import regulations and global market disruptions on import volumes, tax revenue, exchange rates, and the trade balance. However, empirical estimates for food import demand elasticities in Sri Lanka are scarce. The objective of this study is to estimate price and income elasticities of import demand for six food commodities in Sri Lanka, namely, rice, potato, B onion, chilli, mung bean, and soybean. The bound testing procedure was employed to test for cointegration relationships followed by the Unrestricted Error Correction Model approach to obtain consistent short-run and long-run estimates in a single equation framework. The import demand for rice, chili, B onion, and potato were found to be inelastic but elastic for mung bean and soybean in the short run. In the long run, rice, mung bean, and soybean were elastic, while B onion and potato were inelastic. None of the income elasticities were significant in the short run; rice, chili and B onion had positive elasticities in the long run. Using these results, the effects of the increase in import taxes imposed in response to the COVID-19 pandemic were simulated. In the short run a reduction in import demand by 18.9% for B onion and 22.9% for potato were observed leading to foreign exchange savings of LKR 287.82 million and an increase in tax revenue by LKR 396.22 million. In the long run a reduction in import demand by 1.6% for B onion, 9% for potato and 40.8% for mung bean were observed, which are associated with foreign exchange savings of LKR 126.45 million and an increase in tax revenue by LKR 553.78 million. The results highlight the importance of using food import elasticities to compute the likely effects of food import regulations before any policy decisions are made.
Teratosauridae Cope 1871
Creators: name: McIntosh, John S.
Publisher: name: Zenodo
Year: 1981
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Reptilia
Dinosauria
Teratosauridae

description: Family Teratosauridae Teratosaurus and its allies are known from only very fragmentary material, and their position has been the subject of a great deal of controversy. From its traditional assignment as a primitive theropod some have argued that it is really a carnivorous prosauropod, while others have questioned whether it is a saurischian at all. For purposes of this catalogue the conservative position is accepted.
description: Published as part of John S. McIntosh, 1981, Annotated catalogue of the dinosaurs (Reptilia, Archosauria) in the collections of Carnegie Museum of Natural History, pp. 1-67 in Bulletin of Carnegie Museum of Natural History 18 on page 7, DOI: 10.5281/zenodo.3943059
Efficient detection and characterization of exoplanets within the diffraction limit: nulling with a mode-selective photonic lantern
Creators: name: Xin, Yinzi
name: Jovanovic, Nemanja
name: Ruane, Garreth
name: Mawet, Dimitri
name: Fitzgerald, Michael P.
name: Echeverri, Daniel
name: Lin, Jonathan
name: Leon-Saval, Sergio
name: Gatkine, Pradip
name: Kim, Yoo Jung
name: Norris, Barnaby
name: Sallum, Steph
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Coronagraphs allow for faint off-axis exoplanets to be observed, but are limited to angular separations greater than a few beam widths. Accessing closer-in separations would greatly increase the expected number of detectable planets, which scales inversely with the inner working angle. The Vortex Fiber Nuller (VFN) is an instrument concept designed to characterize exoplanets within a single beam-width. It requires few optical elements and is compatible with many coronagraph designs as a complementary characterization tool. However, the peak throughput for planet light is limited to about 20%, and the measurement places poor constraints on the planet location and flux ratio. We propose to augment the VFN design by replacing its single-mode fiber with a six-port mode-selective photonic lantern, retaining the original functionality while providing several additional ports that reject starlight but couple planet light. We show that the photonic lantern can also be used as a nuller without a vortex. We present monochromatic simulations characterizing the response of the Photonic Lantern Nuller (PLN) to astrophysical signals and wavefront errors, and show that combining exoplanet flux from the nulled ports significantly increases the overall throughput of the instrument. We show using synthetically generated data that the PLN detects exoplanets more effectively than the VFN. Furthermore, with the PLN, the exoplanet can be partially localized, and its flux ratio constrained. The PLN has the potential to be a powerful characterization tool complementary to traditional coronagraphs in future high-contrast instruments.
description: 15 pages, 12 figures
“A chiare lettere - Editoriali” • 2021: sempre in attesa di una legge generale sulle libertà di religione, tra inadeguatezza e paura del cimento
Creators: name: Casuscelli, Giuseppe
Publisher: name: Stato, Chiese e pluralismo confessionale
Year: 2021

description: SOMMARIO: 1. Uno sguardo preliminare - 2. La Francia e il progetto di legge “confortant le respect des principes de la République”: realtà sociale e volontà politica - 3. La crisi italiana della laicità e i suoi riflessi sul piano normativo - 4. La vana ricerca dell’attuale indirizzo politico in materia ecclesiastica delle forze di maggioranza nel governo nazionale e la deriva anti-islamista delle forze di opposizione - 5. La pretesa regionale di legiferare in materia di sicurezza e identità non supera il vaglio di legittimità costituzionale - 6. L’impegno della dottrina. la “proposta Astrid”, le critiche e la mancanza di progetti alternativi - 7. Preparare il futuro. 2021: always awaiting a general law on freedom of religion, between inadequacy and fear of the trial ABSTRACT: While France wonders how the secular character of the Republic sholuld change, and President Macron presents a project to profoundly revise 1905 separation law (Loi concernant la Séparation des Eglises e de l’Etat), Italy is still tryng to update 1929 minority cults law (“sull’esercizio dei culti ammessi nello Stato”). The parties that should implement the sucularity principle and religion's freedom, don't have a clear political direction. However, preparing for the future is strictly necessary in these times of health, economic and social emergency.
description: Stato, Chiese e pluralismo confessionale, 2021: 18 gennaio
The biochemistry of the skipjack swimming musculature and its application to metabolic control in vertebrate white muscle
Creators: name: Guppy, Michael
Publisher: name: University of British Columbia
Year: 2010

description: The tunas could be called the 'ultimate teleosts'. They have a high percentage of muscle and a high percentage of that muscle is red muscle, the muscles are kept at above ambient temperatures by a counter current heat exchanger and the respiratory capabilities of these fish are accordingly high. The behavioral culmination of these characteristics is manifested in swimming speeds, which can be extraordinarily high, on a sustained, or a burst basis. One of the hottest and fastest tunas, the skipjack, was used in a study to determine (1) when each muscle is active (2) when and where the muscle heat is produced and (3) what the advantage of the hot musculature is to the animal. Evidence from E. H. , histological, enzyme and metabolite studies suggest that the red muscle is qualitatively quite typical although its aerobic capacity is somewhat above that of other teleost red muscles. The white muscle has truely astounding anaerobic capabilities, but also displays an aerobic capacity not usually found in teleost white muscle. Further examination of white muscle biochemical organization revealed a GP cycle which balances redox during the aerobic catabolism of glycogen and/or glucose. Both LDH (the terminal step in anaerobic glycolysis) and GPDH (the cytoplasmic arm of the GP cycle) are present in white muscle in high activities. Since these enzymes potentially compete for a common co-substrate, NADH, a tight control of these two enzymes seemed necessary to ensure mutual exclusive activity. Metabolite regulators of both enzymes were found which by affecting the ability of each enzyme to compete for NADH, channel carbon and hydrogen to lactate and C02 and H20 under anaerobic and aerobic conditions respectively. , The effect of temperature on metabolism was investigated and it is concluded that the stability rather than the absolute 'set point' of the body temperature is the more important feature.
Asymptotic profiles of solutions for the generalized Fornberg-Whitham equation with dissipation
Creators: name: Fukuda, Ikki
Publisher: name: arXiv
Year: 2022
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35B40, 35Q53

description: We consider the Cauchy problem for the generalized Fornberg-Whitham equation with dissipation. This is one of the nonlinear, nonlocal and dispersive-dissipative equations. The main topic of this paper is an asymptotic analysis for the solutions to this problem. We prove that the solution to this problem converges to the modified heat kernel. Moreover, we construct the second term of asymptotics for the solutions depending on the degree of the nonlinearity. In view of those second asymptotic profiles, we investigate the effects of the dispersion, dissipation and nonlinear terms on the asymptotic behavior of the solutions.
description: 22 pages
Anisotropic three-dimensional magnetism in CaFe2As2
Creators: name: McQueeney, R. J.
name: Diallo, S. O.
name: Antropov, V. P.
name: Samolyuk, G.
name: Broholm, C.
name: Ni, N.
name: Nandi, S.
name: Yethiraj, M.
name: Zarestky, J. L.
name: Pulikkotil, J. J.
name: Kreyssig, A.
name: Lumsden, M. D.
name: Harmon, B. N.
name: Canfield, P. C.
name: Goldman, A. I.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Inelastic neutron scattering measurements on the low energy spin waves in CaFe2As2 show that the magnetic exchange interactions in the Fe layers are exceptionally large and similar to the cuprates. However, the exchange between layers is ~10% of the coupling in the layers and the magnetism is more appropriately categorized as anisotropic three-dimensional, in contrast to the two-dimensional cuprates. Band structure calculations of the spin dynamics and magnetic exchange interactions are in good agreement with the experimental data.
description: 17 pages, 3 figures
Hotel Preference Rank based on Online Customer Review
Creators: name: Saputra, Muhammad Apriandito Arya
name: Alamsyah, Andry
name: Fatihan, Fajar Ibnu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Retrieval (cs.IR)
subject: Social and Information Networks (cs.SI)
subject: General Economics (econ.GN)
subject: FOS: Computer and information sciences
subject: FOS: Economics and business

description: Topline hotels are now shifting into the digital way in how they understand their customers to maintain and ensuring satisfaction. Rather than the conventional way which uses written reviews or interviews, the hotel is now heavily investing in Artificial Intelligence particularly Machine Learning solutions. Analysis of online customer reviews changes the way companies make decisions in a more effective way than using conventional analysis. The purpose of this research is to measure hotel service quality. The proposed approach emphasizes service quality dimensions reviews of the top-5 luxury hotel in Indonesia that appear on the online travel site TripAdvisor based on section Best of 2018. In this research, we use a model based on a simple Bayesian classifier to classify each customer review into one of the service quality dimensions. Our model was able to separate each classification properly by accuracy, kappa, recall, precision, and F-measure measurements. To uncover latent topics in the customer's opinion we use Topic Modeling. We found that the common issue that occurs is about responsiveness as it got the lowest percentage compared to others. Our research provides a faster outlook of hotel rank based on service quality to end customers based on a summary of the previous online review.
description: 5 pages, 6 figures, 5 tables
Intelligenz und neurale Effizienz gemessen mittels EEG-Kohärenz
Creators: name: Schrausser, Dietmar
name: Fink, Andreas
name: Neubauer, Aljoscha
Publisher: name: Zenodo
Year: 2002

description: Neben Indices der globalen kortikalen Aktivierung werden in der Psychophysiologie zunehmend auch EEG-Parameter für die funktionale "Koppelung" verschiedener Kortexareale (EEG-Kohärenzen) analysiert. Empirischen Befunden zur sog. "neural efficiency" -Hypothese der Intelligenz zufolge zeigen intelligentere Personen bei kognitiver Arbeit eine räumlich stärker fokussierte kortikale Aktivierung. Dementsprechend sollten sie auch eine stärkere Dissoziierung bzw. geringere Koppelung der Aktivität verschiedener Kortexareale aufweisen.
Integrable isotropic profiles for polarized light
Creators: name: Davtyan, Mher
name: Gevorkian, Zhyrair
name: Nersessian, Armen
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We consider the propagation of polarized light in the medium with an isotropic refraction index profile and show that polarization violates the additional symmetries of the medium. Then we suggest a scheme for the construction of polarization-dependent refraction index which restores all symmetries of the initial profile. We illustrate the proposed scheme on the examples of Luneburg and Maxwell's fisheye profiles.
description: Based on talk given by M.D XVIII Conference "Symmetry Methods in Physics", 10-16 July, 2022, Yerevan. Submitted to proceedings. arXiv admin note: substantial text overlap with arXiv:2106.15465
The generalized Ermakov conservative system: A discussion
Creators: name: Mitsopoulos, Antonios
name: Tsamparlis, Michael
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Using older and recent results on the integrability of two-dimensional (2d) dynamical systems, we prove that the results obtained in a recent publication concerning the 2d generalized Ermakov system can be obtained as special cases of a more general approach. This approach is geometric and can be used to study efficiently similar dynamical systems.
Machine-learning-based identification for initial clustering structure in relativistic heavy-ion collisions
Creators: name: He, Junjie
name: He, Wan-Bing
name: Ma, Yu-Gang
name: Zhang, Song
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: $α$-clustering structure is a significant topic in light nuclei. A Bayesian convolutional neural network (BCNN) is applied to classify initial non-clustered and clustered configurations, namely Woods-Saxon distribution and three-$α$ triangular (four-$α$ tetrahedral) structure for $^{12}$C ($^{16}$O), from heavy-ion collision events generated within a multi-phase transport (AMPT) model. Azimuthal angle and transverse momentum distributions of charged pions are taken as inputs to train the classifier. On multiple-event basis, the overall classification accuracy can reach $95\%$ for $^{12}$C/$^{16}$O + $^{197}$Au events at $\sqrt{S_{NN}} =$ 200 GeV. With proper constructions of samples, the predicted deviations on mixed samples with different proportions of both configurations could be within $5\%$. In addition, setting a simple confidence threshold can further improve the predictions on the mixed dataset. Our results indicate promising and extensive possibilities of application of machine-learning-based techniques to real data and some other problems in physics of heavy-ion collisions.
description: 12 pages, 11 figures; Accepted by Physical Review C
Low-power multi-mode fiber projector overcomes shallow neural networks classifiers
Creators: name: Ancora, Daniele
name: Negri, Matteo
name: Gianfrate, Antonio
name: Trypogeorgos, Dimitris
name: Dominici, Lorenzo
name: Sanvitto, Daniele
name: Ricci-Tersenghi, Federico
name: Leuzzi, Luca
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optics (physics.optics)
subject: Applied Physics (physics.app-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Machine Learning (stat.ML)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: In the domain of disordered photonics, the characterization of optically opaque materials for light manipulation and imaging is a primary aim. Among various complex devices, multi-mode optical fibers stand out as cost-effective and easy-to-handle tools, making them attractive for several tasks. In this context, we cast these fibers into random hardware projectors, transforming an input dataset into a higher dimensional speckled image set. The goal of our study is to demonstrate that using such randomized data for classification by training a single logistic regression layer improves accuracy compared to training on direct raw images. Interestingly, we found that the classification accuracy achieved is higher than that obtained with the standard transmission matrix model, a widely accepted tool for describing light transmission through disordered devices. We conjecture that the reason for such improved performance could be due to the fact that the hardware classifier operates in a flatter region of the loss landscape when trained on fiber data, which aligns with the current theory of deep neural networks. These findings suggest that the class of random projections operated by multi-mode fibers generalize better to previously unseen data, positioning them as promising tools for optically-assisted neural networks. With this study, in fact, we want to contribute to advancing the knowledge and practical utilization of these versatile instruments, which may play a significant role in shaping the future of neuromorphic machine learning.
description: 12 pages, 8 figures
High-pT photon processes and the photon structure - results from HERA jet and prompt photon (photo)production
Creators: name: Schoerner-Sadenius, Thomas
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Many important QCD tests with jets and prompt photons have been performed with the experiments H1 and ZEUS at the HERA ep collider. This contribution focuses on results from jet and prompt photon photoproduction. In particular, the concept of resolved photon interactions and various jet cross sections and their sensitivity to the photon (and proton) PDFs will be discussed. In addition, recent results from prompt photon production will be shown. Finally results on multi-parton interactions and the underlying event will be presented.
description: Talk given at the workshop on "High energy photon collisions at the LHC", CERN, Geneva, April 2008; 8 pages, 12 figures
Unbalanced Triangle Detection and Enumeration Hardness for Unions of Conjunctive Queries
Creators: name: Bringmann, Karl
name: Carmeli, Nofar
Publisher: name: arXiv
Year: 2022
Subjects: subject: Databases (cs.DB)
subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences

description: We study the enumeration of answers to Unions of Conjunctive Queries (UCQs) with optimal time guarantees. More precisely, we wish to identify the queries that can be solved with linear preprocessing time and constant delay. Despite the basic nature of this problem, it was shown only recently that UCQs can be solved within these time bounds if they admit free-connex union extensions, even if all individual CQs in the union are intractable with respect to the same complexity measure. Our goal is to understand whether there exist additional tractable UCQs, not covered by the currently known algorithms. As a first step, we show that some previously unclassified UCQs are hard using the classic 3SUM hypothesis, via a known reduction from 3SUM to triangle listing in graphs. As a second step, we identify a question about a variant of this graph task that is unavoidable if we want to classify all self-join-free UCQs: is it possible to decide the existence of a triangle in a vertex-unbalanced tripartite graph in linear time? We prove that this task is equivalent in hardness to some family of UCQs. Finally, we show a dichotomy for unions of two self-join-free CQs if we assume the answer to this question is negative. In conclusion, this paper pinpoints a computational barrier in the form of a single decision problem that is key to advancing our understanding of the enumeration complexity of many UCQs. Without a breakthrough for unbalanced triangle detection, we have no hope of finding an efficient algorithm for additional unions of two self-join-free CQs. On the other hand, a sufficiently efficient unbalanced triangle detection algorithm can be turned into an efficient algorithm for a family of UCQs currently not known to be tractable.
Allosaurus Marsh 1877
Creators: name: McIntosh, John S.
Publisher: name: Zenodo
Year: 1981
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Reptilia
Dinosauria
Allosauridae
Allosaurus

description: Family Megalosauridae Genus Allosaurus Marsh, 1877 Syn.: (?) Antrodemus Leidy, 1870. Although it is not unlikely that the half caudal centrum upon which Leidy founded Antrodemus belongs to this animal, the realization in recent years that a number of large theropods were present in the Morrison Formation makes positive verification of the synonymy difficult. Most writers today have returned to the use of the name Allosaurusthe position adopted here.
description: Published as part of John S. McIntosh, 1981, Annotated catalogue of the dinosaurs (Reptilia, Archosauria) in the collections of Carnegie Museum of Natural History, pp. 1-67 in Bulletin of Carnegie Museum of Natural History 18 on page 7, DOI: 10.5281/zenodo.3943059
description: {"references": ["Marsh, O. C. 1877. Notice of new dinosaurian reptiles from the Jurassic formation. Amer. J. Sci., 14: 514 - 516.", "Leidy, J. 1870. Remarks on Poicilopleuron valens, Clidastes intermedins, Leiodon proriger, Baptemys wyomiugeiisis, and Emys stevensonianus. Proc. Acad. Nat. Sci. Philadelphia, pp. 3 - 5."]}
Fisher zeros in the Kallen-Lehmann approach to 3D Ising model
Creators: name: Astorino, Marco
name: Canfora, Fabrizio
name: Giribet, Gaston
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The distribution of the Fisher zeros in the Kallen-Lehmann approach to three-dimensional Ising model is studied. It is argued that the presence of a non-trivial angle (a cusp) in the distribution of zeros in the complex temperatures plane near the physical singularity is realized through a strong breaking of the 2D Ising self-duality. Remarkably, the realization of the cusp in the Fisher distribution ultimately leads to an improvement of the results of the Kallen-Lehmann ansatz. In fact, excellent agreement with Monte Carlo predictions both at high and at low temperatures is observed. Besides, agreement between both approaches is found for the predictions of the critical exponent alpha and of the universal amplitude ratio Delta = A_+/A_-, within the 3.5% and 7% of the Monte Carlo predictions, respectively.
description: 18 pages, 1 figure
Interactive All-Hex Meshing via Cuboid Decomposition
Creators: name: Li, Lingxiao
name: Zhang, Paul
name: Smirnov, Dmitriy
name: Abulnaga, S. Mazdak
name: Solomon, Justin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Graphics (cs.GR)
subject: FOS: Computer and information sciences
subject: I.3.5

description: Standard PolyCube-based hexahedral (hex) meshing methods aim to deform the input domain into an axis-aligned PolyCube volume with integer corners; if this deformation is bijective, then applying the inverse map to the voxelized PolyCube yields a valid hex mesh. A key challenge in these methods is to maintain the bijectivity of the PolyCube deformation, thus reducing the robustness of these algorithms. In this work, we present an interactive pipeline for hex meshing that sidesteps this challenge by using a new representation of PolyCubes as unions of cuboids. We begin by deforming the input tetrahedral mesh into a near-PolyCube domain whose faces are close but not perfectly aligned to the major axis directions. We then build a PolyCube by optimizing the layout of a set of cuboids with user guidance to closely fit the deformed domain. Finally, we construct an inversion-free pullback map from the voxelized PolyCube to the input domain while optimizing for mesh quality metrics. We allow extensive user control over each stage, such as editing the voxelized PolyCube, positioning surface vertices, and exploring the trade-off among competing quality metrics, while also providing automatic alternatives. We validate our method on over one hundred shapes, including models that are challenging for past PolyCube-based and frame-field-based methods. Our pipeline reliably produces hex meshes with quality on par with or better than state-of-the-art. We additionally conduct a user study with 20 participants in which the majority prefer hex meshes they make using our tool to the ones from automatic state-of-the-art methods. This demonstrates the need for intuitive interactive hex meshing tools where the user can dictate the priorities of their mesh.
Higher-order asymptotic profiles for solutions to the Cauchy problem for a dispersive-dissipative equation with a cubic nonlinearity
Creators: name: Fukuda, Ikki
name: Irino, Yota
Publisher: name: arXiv
Year: 2022
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35B40, 35Q53

description: We consider the asymptotic behavior of solutions to the Cauchy problem for a dispersive-dissipative equation with a cubic nonlinearity. It is known that the leading term of the asymptotic profile for the solution to this problem is the Gaussian. Moreover, by analyzing the corresponding integral equation, the higher-order asymptotic expansion for the solution to the linear part and the first asymptotic profile for the Duhamel term have already been obtained. In this paper, we construct the second asymptotic profile for the Duhamel term and give the more detailed higher-order asymptotic expansion of the solutions, which generalizes the previous works. Furthermore, we emphasize that the newly obtained higher-order asymptotic profiles have a good structure in the sense of satisfying the parabolic self-similarity.
description: 19 pages
Feedback Scheduling: An Event-Driven Paradigm
Creators: name: Xia, Feng
name: Tian, Guosong
name: Sun, Youxian
Publisher: name: arXiv
Year: 2008
Subjects: subject: Operating Systems (cs.OS)
subject: FOS: Computer and information sciences
subject: D.4.1; C.3

description: Embedded computing systems today increasingly feature resource constraints and workload variability, which lead to uncertainty in resource availability. This raises great challenges to software design and programming in multitasking environments. In this paper, the emerging methodology of feedback scheduling is introduced to address these challenges. As a closed-loop approach to resource management, feedback scheduling promises to enhance the flexibility and resource efficiency of various software programs through dynamically distributing available resources among concurrent tasks based on feedback information about the actual usage of the resources. With emphasis on the behavioral design of feedback schedulers, we describe a general framework of feedback scheduling in the context of real-time control applications. A simple yet illustrative feedback scheduling algorithm is given. From a programming perspective, we describe how to modify the implementation of control tasks to facilitate the application of feedback scheduling. An event-driven paradigm that combines time-triggered and event-triggered approaches is proposed for programming of the feedback scheduler. Simulation results argue that the proposed event-driven paradigm yields better performance than time-triggered paradigm in dynamic environments where the workload varies irregularly and unpredictably.
description: 8 pages, 10 figures
Solar-Cycle Variations of South-Atlantic Anomaly Proton Intensities Measured With The PAMELA Mission
Creators: name: Bruno, A.
name: Martucci, M.
name: Cafagna, F. S.
name: Sparvoli, R.
name: Adriani, O.
name: Barbarino, G. C.
name: Bazilevskaya, G. A.
name: Bellotti, R.
name: Boezio, M.
name: Bogomolov, E. A.
name: Bongi, M.
name: Bonvicini, V.
name: Campana, D.
name: Carlson, P.
name: Casolino, M.
name: Castellini, G.
name: De Santis, C.
name: Galper, A. M.
name: Koldashov, S. V.
name: Koldobskiy, S.
name: Kvashnin, A. N.
name: Lenni, A.
name: Leonov, A. A.
name: Malakhov, V. V.
name: Marcelli, L.
name: Marcelli, N.
name: Mayorov, A. G.
name: Menn, W.
name: Merge', M.
name: Mocchiutti, E.
name: Monaco, A.
name: Mori, N.
name: Mikhailov, V. V.
name: Munini, R.
name: Osteria, G.
name: Panico, B.
name: Papini, P.
name: Pearce, M.
name: Picozza, P.
name: Ricci, M.
name: Ricciarini, S. B.
name: Simon, M.
name: Sotgiu, A.
name: Spillantini, P.
name: Stozhkov, Y. I.
name: Vacchi, A.
name: Vannuccini, E.
name: Vasilyev, G. I.
name: Voronov, S. A.
name: Yurkin, Y. T.
name: Zampa, G.
name: Zampa, N.
name: Zharaspayev, T. R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: We present a study of the solar-cycle variations of >80 MeV proton flux intensities in the lower edge of the inner radiation belt, based on the measurements of the Payload for Antimatter Matter Exploration and Light-nuclei Astrophysics (PAMELA) mission. The analyzed data sample covers an ~8 year interval from 2006 July to 2014 September, thus spanning from the decaying phase of the 23rd solar cycle to the maximum of the 24th cycle. We explored the intensity temporal variations as a function of drift shell and proton energy, also providing an explicit investigation of the solar-modulation effects at different equatorial pitch angles. PAMELA observations offer new important constraints for the modeling of low-altitude particle radiation environment at the highest trapping energies.
description: accepted for publication in the Astrophysical Journal Letters
André-Quillen Cohomology and $k$-invariants of simplicial categories
Creators: name: Blanc, David
name: Meadows, Nicholas
Publisher: name: arXiv
Year: 2022
Subjects: subject: Algebraic Topology (math.AT)
subject: Category Theory (math.CT)
subject: FOS: Mathematics
subject: 55S35 (primary), 55S45, 18M60

description: Using the Harpaz-Nuiten-Prasma interpretation of the Dwyer-Kan-Smith cohomology of a simplicial category $\mathcal{X}$, we obtain a cochain complex for the André-Quillen cohomology groups in which the $k$-invariants for $\mathcal{X}$ take value. Given a map of simplicial categories $ϕ:\mathcal{Y}\rightarrow P^{(n-1)} \mathcal{X}$ into a Postnikov section of $\mathcal{X}$, we use a homotopy colimit decomposition of $\mathcal{Y}$ to study the obstruction to lifting $ϕ$ to $P^{(n)}\mathcal{X}$. In particular, an explicit description of this obstruction for the boundary of a cube can be used to recover various higher homotopy invariants of $\mathcal{X}$.
description: Article appears in HHA Vol. 27 (2025) pg 147-177
On μ-Compatible Metrics and Measurable Sensitivity
Creators: name: Grigoriev, Ilya
name: Ince, Nathaniel
name: Iordan, Marius Catalin
name: Lubin, Amos
name: Silva, Cesar E.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: We introduce the notion of W-measurable sensitivity, which extends and strictly implies canonical measurable sensitivity, a measure- theoretic version of sensitive dependence on initial conditions. This notion also implies pairwise sensitivity with respect to a large class of metrics. We show that nonsingular ergodic and conservative dynamical systems on standard spaces must be either W-measurably sensitive, or isomorphic mod 0 to a minimal uniformly rigid isometry. In the finite measure-preserving case they are W-measurably sensitive or measurably isomorphic to an ergodic isometry on a compact metric space.
description: Many improvements in exposition, a technical assumption removed, as suggested by the reviewer
Landspatientregisteret
Creators: Statens Serum Institut
Sundhedsdatastyrelsen
Publisher: name: Rigsarkivet
Year: 2022

description: a)	Danne grundlag for Sundhedsdatastyrelsens løbende sygehusstatistik
b)	Forsyne de myndigheder, der er ansvarlig for sygehusplanlægningen med det nødvendige beslutningsgrundlag
Indgå som grundmateriale i forbindelse med overvågning af hyppigheden af forskellige sygdomme og behandlinger.
Cosmology of Bifundamental Fields
Creators: name: Vachaspati, Tanmay
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: If a field theory contains gauged, non-Abelian, bi-fundamental fields i.e. fields that are charged under two separate non-Abelian gauge groups, the transition from a deconfined phase to a hadronic phase may be frustrated. Similar frustration may occur in non-Abelian gauge models containing matter only in higher dimensional representations e.g. models with pure glue, or if ordinary quarks are confined by two flux tubes, as implied in the triangular configuration of baryons within QCD. In a cosmological setting, such models can lead to the formation of a web of confining electric flux tubes that can potentially have observational signatures.
description: 5 pages, 3 figures. Added discussion of Y vs. triangular configurations of baryons in QCD; revised figure; improved discussion
Electrical activity in the hippocampal formation of the rat : role of ascending monoamine-containing systems
Creators: name: Assaf, Souhile Y.
Publisher: name: University of British Columbia
Year: 2010

description: The effects of electrical stimulation of the monoamine-containing nuclei, the median raphe (MR) and the locus coeruleus (LC), on extracellularly recorded hippocampal electrical activty were studied in urethane anaesthetized rats. The following observations suggested that serotonergic and noradrenergic systems originating in MR and LC, respectively, modulate rhythmical slow activity (RSA) recorded in the dentate gyrus and/or the population response of granule cells to stimulation of the perforant path (PP) input. 1. RSA (3-7 Hz,) recorded in the dentate gyrus (DG) was related to the bursting discharge pattern of medial septal (MS) neurones. Electrolytic or kainate lesions of the MS abolished RSA thereby supporting the conclusion that rhythmical hippocampal activity was initiated by MS neurones. 2. Stimulation of MR resulted in disruption of the bursting discharge of MS neurones and desynchronization of RSA. Depletion of forebrain serotonin following pretreatment with para-chlorophenylalanine (p-CPA) eliminated these responses while quipazine (1 mg/kg), a serotonin agonist, mimicked the effects of MR stimulation. These data confirmed that a serotonin-containing system mediates the disruption of bursting discharge in MS and desynchronization of hippocampal electrical activity. 3. LC stimulation evoked RSA. Intracerebral injections of 6-hydroxydopamine (6-OHDA) which depleted hippocampal noradrenaline (NA) did not eliminate this response. In addition, electrolytic lesions of the LC did not eliminate RSA. These data suggested that NA-containing afferents to the hippocampal formation are not essential for the generation of rhythmical activity. 4. Stimulation of the PP resulted in synaptic potentials in the dendritic layer of DG and population spikes recorded in the granule cell body layer. Conditioning stimulation of ME or LC increased the amplitude of the population spike evoked by a test PP pulse without altering the amplitude or rate of rise of the synaptic potential. The effects of MR and LC stimulation were blocked by p-CPA and 6-OHDA, respectively, suggesting that these monoamine-containing nuclei specifically influenced the responsiveness of dentate granule cells. 5. The observations that changes in the amplitude of the population spike, such as those observed following stimulation of MR and LC, could occur in the absence of changes in the synaptic potential were confirmed using an additional afferent to the dentate via the commissural projection. These data indicated that extrinsic afferents to DG may potentiate the discharge of a population of granule cells without enhancing synaptic potentials. On the basis of the above data, it was concluded that pharmacologically distinct neuronal systems originating in MR and LC modulate electrical activity in the hippocampal formation.
Den Danske Valgundersøgelse 1971-2019 - kontinuitetfil
Creators: Kasper Møller Hansen, Det Samfundsvidenskabelige Fakultet KU
Publisher: name: Rigsarkivet
Year: 2022

description: Det Danske Valgprojekt har gennemført landsdækkende repræsentative vælgerundersøgelser efter hvert folketingsvalg siden 1971. Hovedformålet med undersøgelserne er at afdække de væsentligste årsager til, at vælgerne stemmer, som de gør.
Extra-auditory effects of noise in laboratory animals: the relationship between noise and sleep
Creators: name: Rabat, Arnaud
Publisher: name: arXiv
Year: 2008
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Biological sciences

description: Noise has both auditory and extra-auditory effects. Some of the most deleterious extra-auditory effects of noise are those leading to sleep disturbances. These disturbances seem to be related to both endogenous (physical parameters) and exogenous (sex, age) factors of noise. Despite correlative relations between noise level and awakenings, the scientific community has not reached consensus regarding a specific action of these factors on the different sleep stages. In animal research, 2 complementary main fields of research exist. One is focused on the positive modulation of sleep by repeated tone stimulation. The other concerns noise-related sleep disturbances. The few studies that have investigated noise-related sleep disturbances suggest the following conclusions. First, sleep disturbances are greater upon exposure to environmental noise, whose frequency spectrum is characterized by high and ultrasonic sounds, than white noise. Second, unpredictability and pattern of noise events are responsible for extractions from both SWS and PS. Third, chronic exposure to noise permanently reduces and fragments sleep. Finally, in chronic noise exposure, an inter-individual variability in SWS deficits is observed and correlated to a psychobiological profile related to an incapability to face stressful situations. Based on results from other research, acute noise-related sleep perturbations could result from an imbalance in the sleep-wake cycle in favor of arousing ascending systems. Chronic noise-related sleep disturbances may arise due to imbalance of the sleep-wake cycle and malfunctioning of the hypothalamo-pituitary-adrenal axis which may both contribute to the development of pathology.
Solar differential rotation reproduced with high-resolution simulation
Creators: name: Hotta, H.
name: Kusano, K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The Sun rotates differentially with a fast equator and slow pole. Convection in the solar interior is thought to maintain the differential rotation. However, although many numerical simulations have been conducted to reproduce the solar differential rotation, previous high-resolution calculations with solar parameters fall into the anti-solar (fast pole) differential rotation regime. Consequently, we still do not know the true reason why the Sun has a fast-rotating equator. While the construction of the fast equator requires a strong rotational influence on the convection, the previous calculations have not been able to achieve the situation without any manipulations. The problem is called convective conundrum. The convection and the differential rotation in numerical simulations were different from the observations. Here, we show that a high-resolution calculation succeeds in reproducing the solar-like differential rotation. Our calculations indicate that the strong magnetic field generated by a small-scale dynamo has a significant impact on thermal convection. The successful reproduction of the differential rotation, convection, and magnetic field achieved in our calculation is an essential step to understanding the cause of the most basic nature of solar activity, specifically, the 11-year cycle of sunspot activity.
description: 11 pages, 4 figures, published in Nature Astronomy (2021)
Mapping tori of $A_{\infty}$-autoequivalences and Legendrian lifts of exact Lagrangians in circular contactizations
Creators: name: Petr, Adrian
Publisher: name: arXiv
Year: 2022
Subjects: subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics

description: We study mapping tori of quasi-autoequivalences $τ: \mathcal{A} \to \mathcal{A}$ which induce a free action of $\mathbf{Z}$ on objects. More precisely, we compute the mapping torus of $τ$ when it is strict and acts bijectively on hom-sets, or when the $A_{\infty}$-category $\mathcal{A}$ is directed and there is a bimodule map $\mathcal{A} (-, -) \to \mathcal{A} (-, τ(-))$ satisfying some hypotheses. Then we apply these results in order to link together the Fukaya $A_{\infty}$-category of a family of exact Lagrangians, and the Chekanov-Eliashberg DG-category of Legendrian lifts in the circular contactization.
description: 71 pages, 4 figures
Optimal control of entangling operations for trapped ion quantum computing
Creators: name: Nebendahl, V.
name: Haffner, H.
name: Roos, C. F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Optimal control techniques are applied for the decomposition of unitary quantum operations into a sequence of single-qubit gates and entangling operations. To this end, we modify a gradient-ascent algorithm developed for systems of coupled nuclear spins in molecules to make it suitable for trapped ion quantum computing. We decompose unitary operations into entangling gates that are based on a nonlinear collective spin operator and complemented by global spinflip and local light shift gates. Among others, we provide explicit decompositions of controlled-NOT and Toffoli gates, and a simple quantum error correction protocol.
description: Slightly revised version
Den Danske Valgundersøgelse, 2019
Creators: Kasper Møller Hansen, Det Samfundsvidenskabelige Fakultet KU
Rune Stubager, Institut for Statskundskab, Aarhus Universitet
Publisher: name: Rigsarkivet
Year: 2022

description: Det Danske Valgprojekt har gennemført landsdækkende repræsentative vælgerundersøgelser efter hvert folketingsvalg siden 1971. Hovedformålet med undersøgelserne er at afdække de væsentligste årsager til, at vælgerne stemmer, som de gør.
Low mechanical loss TiO$_2$:GeO$_2$ coatings for reduced thermal noise in Gravitational Wave Interferometers
Creators: name: Vajente, Gabriele
name: Yang, Le
name: Davenport, Aaron
name: Fazio, Mariana
name: Ananyeva, Alena
name: Zhang, Liyuan
name: Billingsley, Garilynn
name: Prasai, Kiran
name: Markosyan, Ashot
name: Bassiri, Riccardo
name: Fejer, Martin M.
name: Chicoine, Martin
name: Schiettekatte, Francois
name: Menoni, Carmen S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Materials Science (cond-mat.mtrl-sci)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The sensitivity of current and planned gravitational wave interferometric detectors is limited, in the most critical frequency region around 100 Hz, by a combination of quantum noise and thermal noise. The latter is dominated by Brownian noise: thermal motion originating from the elastic energy dissipation in the dielectric coatings used in the interferometer mirrors. The energy dissipation is a material property characterized by the mechanical loss angle. We have identified mixtures of titanium dioxide (TiO$_2$) and germanium dioxide (GeO$_2$) that show internal dissipations at a level of 1 $\times 10^{-4}$, low enough to provide almost a factor of two improvement on the level of Brownian noise with respect to the state-of-the-art materials. We show that by using a mixture of 44% TiO$_2$ and 56% GeO$_2$ in the high refractive index layers of the interferometer mirrors, it would be possible to achieve a thermal noise level in line with the design requirements. These results are a crucial step forward to produce the mirrors needed to meet the thermal noise requirements for the planned upgrades of the Advanced LIGO and Virgo detectors.
Control-Scheduling Codesign: A Perspective on Integrating Control and Computing
Creators: name: Xia, Feng
name: Sun, Youxian
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Computer Science (cs.OH)
subject: FOS: Computer and information sciences
subject: C.3; D.4.1

description: Despite rapid evolution, embedded computing systems increasingly feature resource constraints and workload uncertainties. To achieve much better system performance in unpredictable environments than traditional design approaches, a novel methodology, control-scheduling codesign, is emerging in the context of integrating feedback control and real-time computing. The aim of this work is to provide a better understanding of this emerging methodology and to spark new interests and developments in both the control and computer science communities. The state of the art of control-scheduling codesign is captured. Relevant research efforts in the literature are discussed under two categories, i.e., control of computing systems and codesign for control systems. Critical open research issues on integrating control and computing are also outlined.
description: 7 pages, 2 figures; A review paper