cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Blockchain-enabled Internet of Medical Things to Combat COVID-19
Creators: name: Dai, Hong-Ning
name: Imran, Muhammad
name: Haider, Noman
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computers and Society (cs.CY)
subject: Cryptography and Security (cs.CR)
subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences
subject: C.2.4; I.2; J.3; K.6.5

description: We are experiencing an unprecedented healthcare crisis caused by newly-discovered corona-virus disease (COVID-19). The outbreaks of COVID-19 reveal the frailties of existing healthcare systems. Therefore, the digital transformation of healthcare systems becomes an inevitable trend. During this process, the Internet of Medical Things (IoMT) plays a crucial role while intrinsic vulnerabilities of security and privacy deter the wide adoption of IoMT. In this article, we present a blockchain-enabled IoMT to address the security and privacy concerns of IoMT systems. We also discuss the solutions brought by blockchain-enabled IoMT to COVID-19 from five different perspectives. Moreover, we outline the open challenges and future directions of blockchain-enabled IoMT.
description: 7 pages, 4 figures, 1 table
Aspects of political propaganda and coin images of Alexander the Great
Creators: name: Olbrycht, Marek
Publisher: name: figshare
Year: 2020
Subjects: subject: History
subject: 210399 Historical Studies not elsewhere classified
subject: FOS: History and archaeology
subject: 210302 Asian History
subject: 210310 Middle Eastern and African History
subject: 219999 History and Archaeology not elsewhere classified
subject: 210306 Classical Greek and Roman History

description: Marek Jan Olbrycht, Aspects of political propaganda and coin images of Alexander the Great (Aspekty propagandy politycznej I portrety monetarne Aleksandra Wielkiego) in: Haec mihi in ani mis vestris templa. Studia Classica in Memory of Professor L. Morawiecki, Rzeszów 2007, 77-95. FS
Measurements of Agricultural Productivity and Efficiency Gains from NAFTA
Creators: name: Yeboah, Osei-Agyeman
name: Gunden, Cihat
name: Shaik, Saleem
name: Allen, Albert J.
name: Li, Tongzhe
name: Yeboah, Osei-Agyeman
name: Gunden, Cihat
name: Shaik, Saleem
name: Allen, Albert J.
name: Li, Tongzhe
Publisher: name: Unknown
Year: 2011
Subjects: subject: International Relations/Trade
subject: Agricultural Efficiency
subject: Data Envelopment Analysis
subject: Malmquist Index
subject: NAFTA
subject: Total Factor Productivity

description: The primary objective of this study is to empirically determine whether North American Free Trade Agreement (NAFTA) has contributed to increased agricultural productivity in any of its member countries. Implementation of the NAFTA began on January 1, 1994. This agreement removed most barriers to trade and investment among the United States, Canada, and Mexico, in which all non-tariff barriers to agricultural trade between these countries were eliminated. Data Envelopment Analysis (DEA) and the Malmquist Productivity Index were used to estimate the total factor productivity change, technical change, and efficiency change of agricultural production for each NAFTA country. Then, using time series data, the efficiency changes in countries were compared to determine whether NAFTA has been beneficial to the agricultural sector of a member country. , Total factor productivity, technical change, and efficiency change of agricultural production in NAFTA countries were analyzed for the period 1980-2007, and then a comparison between pre- and post-NAFTA periods was also made. In the analysis, aggregate agricultural production was used as the output, and five variables were considered as the inputs, which included: land, labor, capital, fertilizer and livestock. The results revealed that the average annual total factor productivity increased by 1.6 percent during the 1980-2007 period for NAFTA countries, mainly coming from technical change. Total factor productivity did not change obviously during the pre-NAFTA period. In contrast, it increased by 2.7 percent due to technical improvements in post-NAFTA period. Consequently, it is noticeable that compared to the pre-NAFTA period, the countries especially Mexico performed better by achieving higher levels of productivity in agricultural production.
COSTREAM: Learned Cost Models for Operator Placement in Edge-Cloud Environments
Creators: name: Heinrich, Roman
name: Binnig, Carsten
name: Kornmayer, Harald
name: Luthra, Manisha
Publisher: name: arXiv
Year: 2024
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Databases (cs.DB)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: In this work, we present COSTREAM, a novel learned cost model for Distributed Stream Processing Systems that provides accurate predictions of the execution costs of a streaming query in an edge-cloud environment. The cost model can be used to find an initial placement of operators across heterogeneous hardware, which is particularly important in these environments. In our evaluation, we demonstrate that COSTREAM can produce highly accurate cost estimates for the initial operator placement and even generalize to unseen placements, queries, and hardware. When using COSTREAM to optimize the placements of streaming operators, a median speed-up of around 21x can be achieved compared to baselines.
description: This paper has been accepted by IEEE ICDE 2024
New Modified Gamma and Beta Functions
Creators: name: Mubeen, S
name: Aslam, I.
name: Khammash, Ghazi S.
name: Nadarajah, Saralees
name: Shehata, Ayman
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Mathematics (math.GM)
subject: FOS: Mathematics

description: This note introduces a new range of modified gamma and beta $k$ functions. The authors present new modified gamma and beta $k$-functions, first and second summation relations, various functionals, Mellin transforms, and integral representations. Furthermore, mean, variance and the moment generating function of a generalized beta distribution are obtained.
Les Particules Numériques
Creators: name: Croissant, Joël
Publisher: name: Zenodo
Year: 2021
Subjects: particule
numérique

description: Présentation par Powerpoint du sujet de réunion : "Les Particules Numériques" sur le site : Problématiques scientifiques de notre temps et philosophie

 Jeudi 25 mars 2021 à 18h30 en visioconférence
 Joël Croissant : Les particules numériques -  Site web
Modeling the onset of type 1 diabetes
Creators: name: Kublik, Richard Alexander
Publisher: name: University of British Columbia
Year: 2009

description: A neonatal wave of apoptosis (programmed cell death) occurs normally in the pancreatic β-cells of mice and rats. Previous collaborative work by members of Diane T Finegood's experimental lab at Simon Fraser University and Leah Edelstein-Keshet's mathematical biology group at the University of British Columbia demonstrated that macrophages from non-obese diabetic (NOD) mice become activated more slowly and engulf apoptotic cells at a lower rate than macrophages from control (Balb/c) mice. It has been hypothesized that this low clearance could result in secondary necrosis of the β-cells, escalating inflammation and the self-antigen presentation that later triggers autoimmune, type 1 diabetes. We here investigate whether this hypothesis could offer a reasonable and simplified explanation for the onset of type 1 diabetes in NOD mice. We quantify variants of the Copenhagen model, developed by Freiesleben De Blasio et al (1999, Diabetes 48, 1677), based on parameters from NOD and Balb/c experimental data. We demonstrate that the original Copenhagen model fails to explain observed phenomena within a reasonable range of parameter values, predicting an unrealistic all-or-none disease occurrence in both strains. However, if we assume that the activated macrophages produce harmful cytokines only when engulfing necrotic (but not apoptotic) cells, then the revised model becomes qualitatively and quantitatively reasonable. Further, we show that known differences between NOD and Balb/c mouse macrophages kinetics are large enough to account for the fact that an apoptotic wave can trigger escalating inflammatory response in NOD, but not Balb/c mice. In Balb/c mice, macrophages clear the apoptotic wave so efficiently, that chronic inflammation is prevented.
The Beneficial Impact of Sorting Heavy Cattle at Re-Implant
Creators: name: Link, David J.
name: Almas, Lal K.
name: Brown, Michael S.
name: Lawrence, Ty E.
name: Link, David J.
name: Almas, Lal K.
name: Brown, Michael S.
name: Lawrence, Ty E.
Publisher: name: Unknown
Year: 2011
Subjects: subject: Farm Management
subject: Livestock Production/Industries
subject: Marketing
subject: FOS: Economics and business
subject: cattle
subject: fed cattle marketing
subject: cattle sorting
subject: formula marketing

description: This research examined a simple sorting strategy to reduce the prevalence of heavyweight carcass discounts. Cattle that were identified and sorted off at re-implant had a reduced prevalence of heavyweight carcasses versus unsorted cattle. Re-implant sorting was profitable at pen average in-weights of 800 pounds or less.
One-loop calculations for SUSY processes
Creators: name: Fritzsche, T.
name: Hollik, W.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Strategy and results for complete one-loop computations in the Minimal Supersymmetric Standard Model are reviewed, with applications to the calculation of SUSY mass spectra and SUSY-particle processes. Determination of renormalization constants and counterterms are described in the on-shell renormalization scheme, and a translation between $\bar{\rm DR}$ and on-shell parameters is given. As an example, cross sections for chargino and neutralino pair production in $e^+e^-$ annihilation are presented, complete at the one-loop level.
description: Talk presented at Loops and Legs in Quantum Field Theory, Zinnowitz, Germany, April 2004
Revealing hidden physical nonclassicality with nonnegative polynomials
Creators: name: Ohst, Ties-A.
name: Yadin, Benjamin
name: Ostermann, Birte
name: de Wolff, Timo
name: Gühne, Otfried
name: Nguyen, Hai-Chau
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: Optimization and Control (math.OC)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Understanding quantum phenomena which go beyond classical concepts is a focus of modern quantum physics. Here, we show how the theory of nonnegative polynomials emerging around Hilbert's 17th problem, can be used to optimally exploit data capturing the nonclassical nature of light. Specifically, we show that nonnegative polynomials can reveal nonclassicality in data even when it is hidden from standard detection methods up to now. Moreover, the abstract language of nonnegative polynomials also leads to a unified mathematical approach to nonclassicality for light and spin systems, allowing us to map methods for one to the other. Conversely, the physical problems arising also inspire several mathematical insights into characterisation of nonnegative polynomials.
description: 17 pages, 5 figures, published version
Cool White Dwarfs in the Sloan Digital Sky Survey
Creators: name: Kilic, Mukremin
name: Munn, Jeffrey A.
name: Harris, Hugh C.
name: Liebert, James
name: von Hippel, Ted
name: Williams, Kurtis A.
name: Metcalfe, Travis S.
name: Winget, D. E.
name: Levine, Stephen E.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A reduced proper motion diagram utilizing Sloan Digital Sky Survey (SDSS) photometry and astrometry and USNO-B plate astrometry is used to separate cool white dwarf candidates from metal-weak, high-velocity main sequence Population II stars (subdwarfs) in the SDSS Data Release 2 imaging area. Follow-up spectroscopy using the Hobby-Eberly Telescope, the MMT, and the McDonald 2.7m Telescope is used to demonstrate that the white dwarf and subdwarf loci separate cleanly in the reduced proper motion diagram, and that the contamination by subdwarfs is small near the cool white dwarf locus. This enables large statistically complete samples of white dwarfs, particularly the poorly understood cool white dwarfs, to be created from the SDSS imaging survey, with important implications for white dwarf luminosity function studies. SDSS photometry for our sample of cool white dwarfs is compared to current white dwarf models.
description: AJ accepted, 36 pages, 11 figures (Figure 1 low-rez version)
Anomalous in-gap edge states in two-dimensional pseudospin-1 Dirac insulators
Creators: name: Xu, Hong-Ya
name: Lai, Ying-Cheng
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum materials that host a flat band, such as pseudospin-1 lattices and magic-angle twisted bilayer graphene, can exhibit drastically new physical phenomena including unconventional superconductivity, orbital ferromagnetism, and Chern insulating behaviors. We report a surprising class of electronic in-gap edge states in pseudospin-1 materials without the conventional need of band-inversion topological phase transitions or introducing magnetism via an external magnetic type of interactions. In particular, we find that, in two-dimensional gapped (insulating) Dirac systems of massive spin-1 quasiparticles, in-gap edge modes can emerge through only an {\em electrostatic potential} applied to a finite domain. Associated with these unconventional edge modes are spontaneous formation of pronounced domain-wall spin textures, which exhibit the feature of out-of-plane spin-angular momentum locking on both sides of the domain boundary and are quite robust against boundary deformations and impurities despite a lack of an explicit topological origin. The in-gap modes are formally three-component evanescent wave solutions, akin to the Jackiw-Rebbi type of bound states. Such modes belong to a distinct class due to the following physical reasons: three-component spinor wave function, unusual boundary conditions, and a shifted flat band induced by the external scalar potential. Not only is the finding of fundamental importance, but it also paves the way for generating highly controllable in-gap edge states with emergent spin textures using the traditional semiconductor gate technology. Results are validated using analytic calculations of a continuum Dirac-Weyl model and tight-binding simulations of realistic materials through characterizations of local density of state spectra and resonant tunneling conductance.
description: 19 pages, 12 figures
On the Kondo effect in carbon nanotubes at half halfing
Creators: name: Babic, B.
name: Kontos, T.
name: Schoenenberger, C.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In a single state of a quantum dot the Kondo effect arises due to the spin-degeneracy, which is present if the dot is occupied with one electron (N = 1). The eigenstates of a carbon nanotube quantum dot possess an additional orbital degeneracy leading to a four-fold shell pattern. This additional degeneracy increases the possibility for the Kondo effect to appear. We revisit the Kondo problem in metallic carbon nanotubes by linear and non-linear transport measurement in this regime, in which the four-fold pattern is present. We have analyzed the ground state of CNTs, which were grown by chemical vapor deposition, at filling N = 1, N = 2, and N = 3. Of particular interest is the half-filled shell, i.e. N = 2. In this case, the ground state is either a paired electron state or a state for which the singlet and triplet states are effectively degenerate, allowing in the latter case for the appearance of the Kondo effect. We deduce numbers for the effective missmatch d of the levels from perfect degeneracy and the exchange energy J. While d ~ 0.1 - 0.2 (in units of level spacing) is in agreement with previous work, the exchange term is found to be surprisingly small: J < 0.02. In addition we report on the observation of gaps, which in one case is seen at N = 3 and in another is present over an extended sequence of levels.
description: full paper including figures at: http://www.unibas.ch/phys-meso/Research/Papers/2004/Kondo-4shell-SWNT.pdf
The Impacts of Farm Size and Economic Risk on No-Till Rice Whole-Farm Profitability
Creators: name: Watkins, K. Bradley
name: Hignight, Jeffrey A.
name: Anders, Merle M.
name: Watkins, K. Bradley
name: Hignight, Jeffrey A.
name: Anders, Merle M.
Publisher: name: Unknown
Year: 2011
Subjects: subject: Farm Management
subject: Production Economics
subject: Risk and Uncertainty
subject: mixed integer programming
subject: no-till
subject: profitability
subject: rice
subject: risk
subject: simulation
subject: stochastic dominance
subject: whole-farm

description: This study evaluated the impacts of farm size and stochastic return variability on no-till (NT) rice profitability at the whole-farm level. Mixed integer programming was used to determine optimal machinery complements, fuel consumption, and machinery labor requirements for conventional till (CT) and NT rice-soybean farms of 1200, 2400, and 3600 acres in size. Crop yields, market prices, and prices for key production inputs were simulated to construct stochastic whole-farm net returns for each farm size under CT and NT management, and both first and second degree stochastic dominance analysis were used to rank cumulative distribution functions of whole-farm returns according to specified risk preferences. The results indicate NT farms exhibit second degree stochastic dominance over CT farms regardless of farm size, and high input prices have less downward effect on the profitability of NT farms relative to CT farms.
Optical Properties of Isolated and Supported Metal Nanoparticles
Creators: name: Noguez, Cecilia
Publisher: name: arXiv
Year: 2004
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A review of the main phenomena related with the linear optical properties of isolated and supported metal nanoparticles is presented. The extinction, absorption and scattering efficiencies are calculated using the Mie theory and the Discrete Dipole Approximation. The origin of the optical spectra is discussed in terms of the size, shape and environment for each nanoparticle. The main optical features of each nanoparticle are identified, showing the tremendous potentiality of optical spectroscopy as a tool of characterization.
description: Accepted in Optical Materials, 14 pages, 7 figures
Local symmetries and physical degrees of freedom in $f(T)$ gravity: a Dirac Hamiltonian constraint analysis
Creators: name: Blagojević, Milutin
name: Nester, James M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the literature on $f(T)$ gravity, the status of local Lorentz invariance and the number of physical degrees of freedom have been controversial issues. Relying on a detailed Hamiltonian analysis, we show that there are several scenarios describing how local Lorentz invariance can be broken, but in the generic case, the number of physical degrees of freedom is found to be $N^*=5$; in $D$ dimensions, this number is $N^*=D(D-3)/2+(D-1)$. As expected, the theory is vulnerable to having problematical propagating modes. We compare our results with those existing in the literature. As a byproduct of our analysis, the diffeomorphysm invariance is explicitly confirmed.
description: LaTeX, 32 pages; v4: Small but important changes in Abstract and subsections 3.3 and 6.2
Synchrotron Radiation From Radiatively Inefficient Accretion Flow Simulations: Applications to Sgr A*
Creators: name: Goldston, Joshua E.
name: Quataert, Eliot
name: Igumenshchev, Igor V.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We calculate synchrotron radiation in three-dimensional pseudo-Newtonian magnetohydrodynamic simulations of radiatively inefficient accretion flows. We show that the emission is highly variable at optically thin frequencies, with order of magnitude variability on time-scales as short as the orbital period near the last stable orbit; this emission is linearly polarized at the 20-50 % level due to the coherent toroidal magnetic field in the flow. At optically thick frequencies, both the variability amplitude and polarization fraction decrease significantly with decreasing photon frequency. We argue that these results are broadly consistent with the observed properties of Sgr A* at the Galactic Center, including the rapid infrared flaring.
description: Accepted for publication in ApJ
Leaf and stem anatomy of Bulgarian endemic Marrubium frivaldskyanum Boiss. (Lamiaceae)
Creators: name: Gyuzeleva, Donika
name: Stoyanov, Plamen
name: Mladenova, Tsvetelina
name: Bivolarska, Anelia
name: Mladenov, Rumen
name: Todorov, Krasimir
Publisher: name: Zenodo
Year: 2021
Subjects: Anatomy
Marrubium frivaldskyanum

description: In the Bulgarian flora, the genus Marrubium L. is represented by four species, of which M. frivaldskyanum is a rare species and Bulgarian endemic. The study presents information about the anatomy of leaves and stems of M. frivaldskyanum, collected from the floristic region of the Rhodopes Mts (western). The leaves show bifacial structure, with mesophyll which is differentiated as palisade and spongy parenchyma. The stomata are of anomocytic and diacytic types, located primarily on the abaxial epidermis. The leaf and stem surfaces are covered with two types of trichomes: non-glandular (unicellular and multicellular) and glandular. The cross-section of the stem represents the typical anatomy structure of dicotyledons. In terms of the shape, it is quadrangular, and collenchyma tissue can be seen under the epidermis in the area of the edges.
Caterpillars, ribbons, and the chromatic symmetric function
Creators: name: Morin, Matthew
Publisher: name: University of British Columbia
Year: 2009

description: For every n-vertex tree T, it is known that the chromatic polynomial x(T, k) is equal to k(k — l )ⁿ⁻¹. It is known that the function in noncommuting variables, Y[sub G](x), distinguishes all simple graphs. In the midground, the question of whether or not the chromatic symmetric function X[sub G](x) distinguishes nonisomorphic trees is still open. We look at Stanley's expansion of X[sub G](x) in terms of the power sum symmetric basis {pλ(x)| λ|-n) of Λⁿ , and identify properties of our trees in various coefficients of the pλ in this expansion for X[sub G](x). By restricting to the case when our tree is a caterpillar C, we shall use a correspondence between ribbons and caterpillars to look at the coefficients of the pλ(x) in the expansion of X[sub C](x) using ribbon classes. Among these ribbon classes we will have special interest in those which are symmetric. We show that the chromatic symmetric function distinguishes these symmetric classes from all other caterpillars.
The Seleukids and the Arsakids: propaganda aspects in the rivalry for supremacy in the "Hellenistic Near East"
Creators: name: Olbrycht, Marek
Publisher: name: figshare
Year: 2020
Subjects: subject: History
subject: 210399 Historical Studies not elsewhere classified
subject: FOS: History and archaeology
subject: 210302 Asian History
subject: 210310 Middle Eastern and African History
subject: 219999 History and Archaeology not elsewhere classified
subject: 210306 Classical Greek and Roman History

description: Marek Jan Olbrycht, The Seleukids and the Arsakids: propaganda aspects in the rivalry for supremacy in the "Hellenistic Near East" (Seleukidzi i Arsakidzi: aspekty propagandy w walce o hegemonię na “hellenistycznym” Bliskim Wschodzie) In: Ideology and Propaganda in Antiquity. Materials of a Conference organized by the Ancient History Committee of the Polish Historical Association, Rzeszów, September 12-14, 2000. Rzeszow, 2004, 45 – 68. (in Polish, German summary).
Fractional regularity, global persistence, and asymptotic properties of the Boussinesq equations on bounded domains
Creators: name: Aydın, Mustafa Sencer
name: Jayanti, Pranava Chaitanya
Publisher: name: arXiv
Year: 2024
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We address the long-time behavior of the 2D Boussinesq system, which consists of the incompressible Navier-Stokes equations driven by a non-diffusive density. We construct globally persistent solutions on a smooth bounded domain, when the initial data belongs to $(H^k\cap V)\times H^k$ for $k\in\mathbb{N}$ and $H^s\times H^s$ for $0
PROPERTY RIGHTS IN A FLEA MARKET ECONOMY
Creators: name: Fafchamps, Marcel
name: Minten, Bart
name: Fafchamps, Marcel
name: Minten, Bart
Publisher: name: Unknown
Year: 1999
Subjects: subject: Marketing
subject: FOS: Economics and business
subject: Resource /Energy Economics and Policy

description: This paper studies liberalized grain markets in Madagascar and examines how property rights are protected and contracts are enforced among agricultural traders. We find that the incidence of theft and breach of contract is low and that the losses resulting from such instances are small. This, however, does not result from reliance on legal institutions -- actual recourse to police and courts is fairly rare, except in cases of theft -- but from traders’ reluctance to expose themselves to opportunism. As a result, Malagasy grain trade resembles a flea market, with little or no forward contracting and high transactions costs. The dominant contract enforcement mechanism is trust-based relationships. Trust is established primarily through repeated interaction with little role for referral by other traders. Information on bad clients does not circulate widely, hence severely limiting group punishments for non payment.
Incompatible Coulomb hamiltonian extensions
Creators: name: Abramovici, G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We revisit the resolution of the one-dimensional Schrödinger hamiltonian with a Coulomb $λ$/|x| potential. We examine among its self-adjoint extensions those which are compatible with physical conservation laws. In the one-dimensional semi-infinite case, we show that they are classified on a U(1) circle in the attractive case and on (R,$\infty$) in the repulsive one. In the one-dimensional infinite case, we find a specific and original classification by studying the continuity of eigenfunctions. In all cases, different extensions are incompatible one with the other. For an actual experiment with an attractive potential, the bound spectrum can be used to discriminate which extension is the correct one.
description: 26 pages, 10 figures
Study of the doubly and singly Cabibbo suppressed decays D+ --> K+ pi+ pi- and Ds+ --> K+ pi+ pi-
Creators: name: FOCUS Collaboration
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Using data collected by the high energy photoproduction experiment FOCUS at Fermilab we study the doubly and singly Cabibbo suppressed decays D+ and Ds+ --> K+ pi+ pi-. Branching ratios and Dalitz plot analyses are performed.
description: 14 pages, paper to be submitted to Phys.Lett.B
Creating an Empire: Iran and Middle Asia in the Policy of Seleukos I
Creators: name: Olbrycht, Marek
Publisher: name: figshare
Year: 2020
Subjects: subject: 210399 Historical Studies not elsewhere classified
subject: FOS: History and archaeology
subject: History
subject: 210302 Asian History
subject: 210310 Middle Eastern and African History

description: Marek Jan Olbrycht, Creating an Empire: Iran and Middle Asia in the Policy of Seleukos I, in: V. P. Nikonorov (ed.), Central Asia from the Achaemenids to the Timurids. Archaeology, History, Ethnology, Culture. Materials of an International Scientific Conference dedicated to the Centenary of Aleksandr Markovich Belenitsky, St. Petersburg, November 2-5, 2004, Sankt-Petersburg 2004, 231-235.
LAI-Net: Local-Ancestry Inference with Neural Networks
Creators: name: Montserrat, Daniel Mas
name: Bustamante, Carlos
name: Ioannidis, Alexander
Publisher: name: arXiv
Year: 2020
Subjects: subject: Genomics (q-bio.GN)
subject: FOS: Biological sciences

description: Local-ancestry inference (LAI), also referred to as ancestry deconvolution, provides high-resolution ancestry estimation along the human genome. In both research and industry, LAI is emerging as a critical step in DNA sequence analysis with applications extending from polygenic risk scores (used to predict traits in embryos and disease risk in adults) to genome-wide association studies, and from pharmacogenomics to inference of human population history. While many LAI methods have been developed, advances in computing hardware (GPUs) combined with machine learning techniques, such as neural networks, are enabling the development of new methods that are fast, robust and easily shared and stored. In this paper we develop the first neural network based LAI method, named LAI-Net, providing competitive accuracy with state-of-the-art methods and robustness to missing or noisy data, while having a small number of layers.
J/psi transport in QGP and Pt distribution at SPS and RHIC
Creators: name: Zhu, Xianglei
name: Zhuang, Pengfei
name: Xu, Nu
Publisher: name: arXiv
Year: 2004
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Combining the hydrodynamic equations for the QGP evolution and the transport equation for the primordially produced $J/ψ$ in the QGP, we investigate the $J/ψ$ transverse momentum distribution as well as its suppression in the $\sqrt{s}$=17.3A GeV Pb-Pb collisions at SPS and $\sqrt{s}$=200A GeV Au-Au collisions at RHIC. The two sets of equations are connected by the $J/ψ$ anomalous suppression induced by its inelastic scattering with gluons in the QGP. The calculated centrality dependence of $J/ψ$ suppression and average transverse momentum square agree well with the SPS data. From the comparison with the coalescence model where charm quark is fully thermalized, our calculated elliptical flow of the primordially produced $J/ψ$ is much smaller. This may be helpful to differentiate the $J/ψ$ production mechanisms in relativistic heavy ion collisions.
description: 6 pages, 4 figures
Policy and Royal Propaganda in Parthia: Hellenistic Concepts versus Nomadic and Iranian Tradition under the Arsacids
Creators: name: Olbrycht, Marek
Publisher: name: figshare
Year: 2020
Subjects: subject: History
subject: 210302 Asian History
subject: FOS: History and archaeology
subject: 210310 Middle Eastern and African History
subject: 219999 History and Archaeology not elsewhere classified

description: Marek Jan Olbrycht, Policy and Royal Propaganda in Parthia: Hellenistic Concepts versus Nomadic and Iranian Tradition under the Arsacids, in: V.M. Masson (ed.), Kulturnoe naslediye Turkmenistana (glubinnye istoki i sovremennye perspektivy). Materialy k mezhdunarodnoy nauchnoy konferentsii, Ašgabat, 10.-13. 10. 2000, Ašgabat-Sankt Peterburg, 2000, 35-38.
RELATIONSHIPS AND TRADERS IN MADAGASCAR
Creators: name: Fafchamps, Marcel
name: Minten, Bart
name: Fafchamps, Marcel
name: Minten, Bart
Publisher: name: Unknown
Year: 1998
Subjects: subject: Marketing
subject: FOS: Economics and business

description: This paper documents the role that personal relationships play in economic exchange. Original survey data show that agricultural traders in Madagascar perceive relationships as the most important factor for success in their business. Evidence details the extent to which relationships are used to serve a variety of purposes such as: the circulation of information about prices and market conditions; the provision of trade credit; the prevention and handling of contractual difficulties; the regularity of trade flows; and the mitigation of risk. Of these, the regularity of supply and demand and the sharing of risk appear particularly important. Larger and more prosperous traders are those with quantitatively and qualitatively better relationships. Family plays little role in business beyond assistance at start-up.
Edms in SUSY GUTS
Creators: name: Hisano, Junji
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Hadronic and leptonic EDMs in SUSY GUTs are reviewed in this article.
description: Talk given at NuFact04, Osaka, Japan, July 26 - August 1,2004 - 3 pages, 2 figures
GENERATING DISAGGREGATED POVERTY MAPS: AN APPLICATION TO VIET NAM
Creators: name: Minot, Nicholas
name: Minot, Nicholas
Publisher: name: Unknown
Year: 1998
Subjects: Food Security and Poverty

description: Geographic targeting is often recommended as a way to improve the impact of social spending and infrastructure investments on rural poverty. Previous research shows that such targeting is not very accurate unless the geographic units are small. Household surveys, however, rarely allow the estimation of poverty rates for more than 5-10 regions in a country. This study develops a method for generating disaggregated poverty maps and applies the method to Viet Nam. First, the relationship between rural poverty and 25 household indicators is estimated using household survey data. Then, census data on those same indicators are used to estimate the poverty rates for each of the 543 rural districts in Viet Nam. The results indicate that poverty is concentrated in the north and in districts furthest from the coast and cities.
On the Neyman-Pearson problem for law-invariant risk measures and robust utility functionals
Creators: name: Schied, Alexander
Publisher: name: arXiv
Year: 2004
Subjects: subject: Probability (math.PR)
subject: Risk Management (q-fin.RM)
subject: FOS: Mathematics
subject: FOS: Economics and business
subject: 91B28, 91B30, 62G10 (Primary)

description: Motivated by optimal investment problems in mathematical finance, we consider a variational problem of Neyman-Pearson type for law-invariant robust utility functionals and convex risk measures. Explicit solutions are found for quantile-based coherent risk measures and related utility functionals. Typically, these solutions exhibit a critical phenomenon: If the capital constraint is below some critical value, then the solution will coincide with a classical solution; above this critical value, the solution is a superposition of a classical solution and a less risky or even risk-free investment. For general risk measures and utility functionals, it is shown that there exists a solution that can be written as a deterministic increasing function of the price density.
Problemy istoricheskoy geografii Turkmenistana v éllinisticheskiy i arshakidskiy periody
Creators: name: Olbrycht, Marek
Publisher: name: figshare
Year: 2020
Subjects: subject: 210108 Historical Archaeology (incl. Industrial Archaeology)
subject: FOS: History and archaeology
subject: 210399 Historical Studies not elsewhere classified
subject: History
subject: 210310 Middle Eastern and African History
subject: 219999 History and Archaeology not elsewhere classified
subject: 210306 Classical Greek and Roman History

description: Marek Jan Olbrycht, Problemy istoricheskoy geografii Turkmenistana v éllinisticheskiy i arshakidskiy periody, in: M. A. Annanepesov (ed.), Merv v drevney i srednevekovoy istorii Vostoka III: Merv i parfyanskaya épokha. Tezisy dokladov nauchnoy konferentsii, Ashgabat 1992, 21-22.
Numerical Particles
Creators: name: Croissant, Joël
Publisher: name: Zenodo
Year: 2021
Subjects: Particles
Numerical

description: Article de publication proposant une origine numérique et mathématique aux particules en complément de la présentation : "Problématiques scientifiques de notre temps et philosophie"

 Jeudi 25 mars 2021 à 18h30 en visioconférence
 Joël Croissant : Les particules numériques -  Site web
Embodied Navigation in Immersive Abstract Data Visualization: Is Overview+Detail or Zooming Better for 3D Scatterplots?
Creators: name: Yang, Yalong
name: Cordeil, Maxime
name: Beyer, Johanna
name: Dwyer, Tim
name: Marriott, Kim
name: Pfister, Hanspeter
Publisher: name: arXiv
Year: 2020
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Graphics (cs.GR)
subject: FOS: Computer and information sciences

description: Abstract data has no natural scale and so interactive data visualizations must provide techniques to allow the user to choose their viewpoint and scale. Such techniques are well established in desktop visualization tools. The two most common techniques are zoom+pan and overview+detail. However, how best to enable the analyst to navigate and view abstract data at different levels of scale in immersive environments has not previously been studied. We report the findings of the first systematic study of immersive navigation techniques for 3D scatterplots. We tested four conditions that represent our best attempt to adapt standard 2D navigation techniques to data visualization in an immersive environment while still providing standard immersive navigation techniques through physical movement and teleportation. We compared room-sized visualization versus a zooming interface, each with and without an overview. We find significant differences in participants' response times and accuracy for a number of standard visual analysis tasks. Both zoom and overview provide benefits over standard locomotion support alone (i.e., physical movement and pointer teleportation). However, which variation is superior, depends on the task. We obtain a more nuanced understanding of the results by analyzing them in terms of a time-cost model for the different components of navigation: way-finding, travel, number of travel steps, and context switching.
description: To be presented at IEEE Conference on Information Visualization (InfoVis 2020)
Effective dynamics in Hamiltonian systems with mixed phase space
Creators: name: Motter, Adilson E.
name: de Moura, Alessandro P. S.
name: Grebogi, Celso
name: Kantz, Holger
Publisher: name: arXiv
Year: 2005
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Dynamical Systems (math.DS)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: An adequate characterization of the dynamics of Hamiltonian systems at physically relevant scales has been largely lacking. Here we investigate this fundamental problem and we show that the finite-scale Hamiltonian dynamics is governed by effective dynamical invariants, which are significantly different from the dynamical invariants that describe the asymptotic Hamiltonian dynamics. The effective invariants depend both on the scale of resolution and the region of the phase space under consideration, and they are naturally interpreted within a framework in which the nonhyperbolic dynamics of the Hamiltonian system is modeled as a chain of hyperbolic systems.
description: 4 figures, Revtex
The Cimmerian Problem Re-Examined: the Evidence of the Classical Sources
Creators: name: Olbrycht, Marek
Publisher: name: figshare
Year: 2020
Subjects: subject: 210399 Historical Studies not elsewhere classified
subject: FOS: History and archaeology
subject: History
subject: 210302 Asian History
subject: 210310 Middle Eastern and African History
subject: 219999 History and Archaeology not elsewhere classified
subject: 210306 Classical Greek and Roman History
subject: 210102 Archaeological Science
subject: 210199 Archaeology not elsewhere classified
subject: 210105 Archaeology of Europe, the Mediterranean and the Levant
subject: Archaeology
subject: 210103 Archaeology of Asia, Africa and the Americas

description: Marek Jan Olbrycht, The Cimmerian Problem Re-Examined: the Evidence of the Classical Sources, in: J. Pstrusińska; A. T. Fear (eds.), Collectanea Celto-Asiatica Cracoviensia, Kraków 2000, 71-99. DOI: 10.13140/RG.2.1.1522.1529

https://www.researchgate.net/publication/297204031_The_Cimmerian_Problem_Re-Examined_the_Evidence_of_the_Classical_Sources?channel=doi&linkId=56dd982c08aed4e2a99c51e7&showFulltext=true
An iterative method for pricing the American put options with dividends
Creators: name: Coman, Florica
Publisher: name: University of British Columbia
Year: 2009

description: In this thesis we present a fixed-front approach for pricing the American Put Options with dividends, combined with an iterative method. This approach transforms the free boundary problem into a nonlinear parabolic differential equation defined on a fixed spatial domain. The resulting equation has been solved using an implicit numerical scheme. The method can be easily applied to Barrier Options with dividends and numerical results were shown to compare well with the optimal exercise boundary for different dividend yields and different values of the barrier. All the programming work has been done in MATLAB and sample of codes can be found in Appendix B.
On completeness of foliated structures, and null Killing fields
Creators: name: Hanounah, Malek
name: Mehidi, Lilia
Publisher: name: arXiv
Year: 2024
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C50, 53B30

description: We consider a compact manifold $(M,\mathfrak{F})$ with a foliation $\mathfrak{F}$, and a smooth affine connection $\nabla$ on the tangent bundle of the foliation $T\mathfrak{F}$. We introduce and study a foliated completeness problem. Namely, under which conditions on $\nabla$ the leaves are complete? We consider different natural geometric settings: the first one is the case of a totally geodesic lightlike foliation of a compact Lorentzian manifold, and the second one is the case where the leaves have particular affine structures. In the first case, we characterize the completeness, and obtain in particular that if a compact Lorentzian manifold admits a null Killing field $V$ such that the distribution orthogonal to $V$ is integrable, then it defines a (totally geodesic) foliation with complete leaves. In the second case, we give a completeness result for a specific affine structure called "the unimodular affine lightlike geometry", and characterize the completeness for a natural relaxation of the geometry. On the other hand, we study the global completeness of a compact Lorentzian manifold in the presence of a null Killing field. We give two non-complete examples, starting from dimension $3$: one is a locally homogeneous manifold, and the other is a $3$D example where the Killing field dynamics is equicontinuous.
description: 23 pages, 1 figure
THE IMPACT OF LIVESTOCK AND FISHERIES ON FOOD AVAILABILITY AND DEMAND IN 2020
Creators: name: Delgado, Christopher L.
name: Crosson, Pierre
name: Courbois, Claude B.
name: Delgado, Christopher L.
name: Crosson, Pierre
name: Courbois, Claude B.
Publisher: name: Unknown
Year: 1997
Subjects: Food Security and Poverty
Livestock Production/Industries

description: People in developed countries consume about 3 to 4 times as much meat and fish, and 5 to 6 times as much milk products per capita as in developing Asia and Africa. Yet, meat, milk, and fish consumption per capita has barely grown in the developed countries as a whole over the past 20 years. Growth in per capita consumption and production has occurred in developing regions such as developing Asia, where income has increased from a low level and urbanization is rapid. By 2020, according to projections by IFPRI's IMPACT model, the share of the developing countries in total world meat consumption will rise from 47 percent currently to 64 percent. The net impact on food access for the poor of the world will depend on their role as producers of meat, milk, and fish, their role as consumers, and their need for protein. The amount of cereals per capita consumed directly by rural people will decline as they diversify their diets into animal proteins, but feed use will increase greatly. Available evidence suggests that on balance poor consumers in developing countries will probably be better off.
Spectroscopic Signature for Local-moment Magnetism in van der Waals Ferromagnet Fe$_3$GeTe$_2$
Creators: name: Xu, X.
name: Li, Y. W.
name: Duan, S. R.
name: Zhang, S. L.
name: Chen, Y. J.
name: Kang, L.
name: Liang, A. J.
name: Chen, C.
name: Xia, W.
name: Xu, Y.
name: Malinowski, P.
name: Xu, X. D.
name: Chu, J. -H.
name: Li, G.
name: Guo, Y. F.
name: Liu, Z. K.
name: Yang, L. X.
name: Chen, Y. L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The van der Waals ferromagnet Fe$_3$GeTe$_2$ has recently attracted extensive research attention due to its intertwined magnetic, electronic and topological properties. Here, using high-resolution angle-resolved photoemission spectroscopy, we systematically investigate the temperature evolution of the electronic structure of bulk Fe$_3$GeTe$_2$. We observe largely dispersive energy bands that are narrowed by a factor of 1.6 compared with ab-initio calculation. Upon heating towards the ferromagnetic transition near 225 K, we observe a massive reduction of quasiparticle coherence in a large energy range, which is attributed to the enhanced magnetic fluctuation in the system. Remarkably, the electron bands barely shift with increasing temperature, which deviates from the exchange splitting picture within the itinerant Stoner model. We argue that the local magnetic moments play a crucial role in the ferromagnetism of Fe$_3$GeTe$_2$, despite its strongly itinerant nature. Our results provide important insights into the electronic and magnetic properties of Fe$_3$GeTe$_2$ and shed light on the generic understanding of itinerant magnetism in correlated materials.
description: 4 figures
Oscillations of dark solitons in trapped Bose-Einstein condensates
Creators: name: Pelinovsky, Dmitry E.
name: Frantzeskakis, D. J.
name: Kevrekidis, P. G.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We consider a one-dimensional defocusing Gross--Pitaevskii equation with a parabolic potential. Dark solitons oscillate near the center of the potential trap and their amplitude decays due to radiative losses (sound emission). We develop a systematic asymptotic multi-scale expansion method in the limit when the potential trap is flat. The first-order approximation predicts a uniform frequency of oscillations for the dark soliton of arbitrary amplitude. The second-order approximation predicts the nonlinear growth rate of the oscillation amplitude, which results in decay of the dark soliton. The results are compared with the previous publications and numerical computations.
description: 13 pages, 3 figures