cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
PHYSICAL, CHEMICAL AND BACTERIOLOGICAL QUALITY OF INJIBARA TOWN DRINKING WATER SUPPLY FROM THE SOURCE TO END USERS
Creators: name: BEYENECH ALIMAW BEZABIH
Publisher: name: Zenodo
Year: 2021

description: Different Source of water for physical, chemical, and Bacteriological Evaluation were Boreholes, Hand dug well, spring, Tap, and reservoir. The great parts of residential people in the study area meet their daily water consumption fetching from traditional hand- dug, river, spring, and rainwater during rainy seasons, the injiabara town has no permanent proper sewage disposal site for disposing wastes. As result the community is exposed for different diseases such as diarrheal, Girdiaeass, Amaba, Malaria, and bacteria. Physical, Chemical, and Bacteriological quality assessment was conducted in the study area by took total 46 Water sample collected based on WHO standards). Analysis methods used in the study, Sulphate was determined by using a photometer; Calcium, magnesium, chloride, and bicarbonate were determined by the titrimetric method. And Sodium and potassium was analyzed using a flame photometer. Total hardness (TH) as CaCO-3, Calcium (Ca2+), (bicarbonate (HCO3 - ) were analyzed by volumetric methods. Temperature, PH, electrical conductivity (E.C), Total dissolve substances (TDS), Turbidity were conducted by Thermometer and Protablemulti parameter instrument respectively. Free chlorine residual, nitrates, were conducted by using DPD and nitrate powder. The isolation and enumeration of FC and TC were carried out using Membrane Filtration (MF) techniques.
Asymmetric Twin Dark Matter
Creators: name: Farina, Marco
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study a natural implementation of Asymmetric Dark Matter in Twin Higgs models. The mirroring of the Standard Model strong sector suggests that a twin baryon with mass around 5 GeV is a natural Dark Matter candidate once a twin baryon number asymmetry comparable to the SM asymmetry is generated. We explore twin baryon Dark Matter in two different scenarios, one with minimal content in the twin sector and one with a complete copy of the SM, including a light twin photon. The essential requirements for successful thermal history are presented, and in doing so we address some of the cosmological issues common to many Twin Higgs models. The required interactions we introduce predict signatures at direct detection experiments and at the LHC.
description: 15 pages, 2 figures, v2: final revision with minor corrections, matches the version published in JCAP
Knowledge Mapping of Learning Analytics and Professional Capital in Education: a Bibliometric Study
Creators: name: De La Hoz-Ruíz, Javier
name: Khalil, Mohammad
name: Segovia, Jesús Domingo
Publisher: name: Zenodo
Year: 2023

description: Knowledge Mapping of Learning Analytics and Professional Capital in Education: a Bibliometric Study. En European Conference on Educational Research: ECER 2023 "The Value of Diversity in Education and Educational Research". University of Glasgow (Glasgow, Escocia, U.K), 22–25 August 2023
Cerebrospinal fluid immune cells appear similar across neuropathic and non-neuropathic pain conditions
Creators: name: Denk, Franziska
Publisher: name: OSF Registries
Year: 2023
Subjects: subject: Immunology and Infectious Disease
subject: Other Immunology and Infectious Disease
subject: Life Sciences
subject: Molecular and Cellular Neuroscience
subject: Neuroscience and Neurobiology

description: Background: Microglia have been implicated in the pathophysiology of neuropathic pain. Here, we sought to investigate whether cerebrospinal fluid (CSF) might be used as a proxy-measure of microglial activation in human participants. Methods: We preformed fluorescence-activated cell sorting (FACS) of CSF immune cell populations derived from individuals who experienced pain with neuropathic features. We sorted CD4+, CD8+ T cells and monocytes and analyzed their transcriptome using RNA sequencing. We also performed Cellular Indexing of Transcriptomes and Epitopes (CITE) sequencing to characterize the expression of all CSF immune cells in a patient with postherpetic neuralgia and in a patient with neuropathic pain after failed back surgery. Results: Immune cell numbers and phenotypes were not obviously different between individuals regardless of the etiology of their pain. This was true when examining our own dataset, as well as when comparing it to previously published single-cell RNA sequencing data of human CSF. In all instances, CSF monocytes showed expression of myeloid cell markers commonly associated with microglia (P2RY12, TMEM119 and OLFML3), which will make it difficult to ascertain the origin of CSF proteins: do they derive directly from circulating CSF monocytes or could some originate in spinal cord microglia in the parenchyma? Conclusions: We conclude that it will not be straightforward to use CSF as a biomarker for microglial function in humans.
Ordered Decompositional DAG Kernels Enhancements
Creators: name: Martino, Giovanni Da San
name: Navarin, Nicolò
name: Sperduti, Alessandro
Publisher: name: arXiv
Year: 2015
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: In this paper, we show how the Ordered Decomposition DAGs (ODD) kernel framework, a framework that allows the definition of graph kernels from tree kernels, allows to easily define new state-of-the-art graph kernels. Here we consider a fast graph kernel based on the Subtree kernel (ST), and we propose various enhancements to increase its expressiveness. The proposed DAG kernel has the same worst-case complexity as the one based on ST, but an improved expressivity due to an augmented set of features. Moreover, we propose a novel weighting scheme for the features, which can be applied to other kernels of the ODD framework. These improvements allow the proposed kernels to improve on the classification performances of the ST-based kernel for several real-world datasets, reaching state-of-the-art performances.
description: Paper accepted for publication in Neurocomputing
Individual participant data from Luminance contrast provides metric depth information
Creators: name: Hibbard, Paul B.
name: Goutcher, Ross
name: Hornsey, Rebecca L.
name: Hunter, David W.
name: Scarfe, Peter
Publisher: name: The Royal Society
Year: 2023
Subjects: subject: 179999 Psychology and Cognitive Sciences not elsewhere classified
subject: FOS: Psychology

description: This file contains plots of data for individual participants, to complement the plots of average data in the article.
Elliptic complexes on manifolds with boundary
Creators: name: Schulze, B. -W.
name: Seiler, J.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Analysis of PDEs (math.AP)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 58J10, 47L15 (primary), 18G35, 35S15, 58J40 (secondary)

description: We show that elliptic complexes of (pseudo)differential operators on smooth compact manifolds with boundary can always be complemented to a Fredholm problem by boundary conditions involving global pseudodifferential projections on the boundary (similarly as the spectral boundary conditions of Atiyah, Patodi and Singer for a single operator). We prove that boundary conditions without projections can be chosen if, and only if, the topological Atiyah-Bott obstruction vanishes. These results make use of a Fredholm theory for complexes of operators in algebras of generalized pseudodifferential operators of Toeplitz type which we also develop in the present paper.
description: 41 pages, title of manuscript updated
pymcabc: A Particle Physics Toy Toolbox for the ABC Model
Creators: name: Desai, Aman
Publisher: name: Zenodo
Year: 2023

description: We present the pymcabc software which is a High Energy Physics toy toolkit for the ABC model. The ABC model is a pedagogical model that consists of three scalar particles of arbitrary masses. The only interaction among these particles occurs when all three of them are present together. The pymcabc software can calculate all the leading-order cross-sections as well as decay widths within the ABC model. The software can be used as an Event Generator to simulate all the scattering processes within the ABC model. Moreover, it simulates the decays associated with the heavy-particle final state, leading to a 2→3 or a 2→4 type final states within the ABC model. We also apply toy gaussian detector effects to simulate the detector response of a toy tracker for three-momentum measurements and a toy calorimeter for energy measurements. Using the results of the pymcabc software, we have also illustrated some well-known physics analyses techniques such as the analysis of the lineshape of a heavy propagator and recoil mass reconstruction.
Dynamics and quantumness of excitation energy transfer through a complex quantum network
Creators: name: Qin, M.
name: Shen, H. Z.
name: Zhao, X. L.
name: Yi, X. X.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Biological Physics (physics.bio-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Understanding the mechanisms of efficient and robust energy transfer in organic systems provides us with new insights for the optimal design of artificial systems. In this paper, we explore the dynamics of excitation energy transfer (EET) through a complex quantum network by a toy model consisting of three sites coupled to environments. We study how the coherent evolution and the noise-induced decoherence work together to reach efficient EET and illustrate the role of the phase factor attached to the coupling constant in the EET. By comparing the differences between the Markovian and non-Markovian dynamics, we discuss the effect of environment and the spatial structure of system on the dynamics and the efficiency of EET. A intuitive picture is given to show how the exciton is transferred through the system. Employing the simple model, we show the robustness of EET efficiency under the influence of the environment and elucidate the important role of quantum coherence in EET. We go further to study the quantum feature of the EET dynamics by {\it quantumness} and show the importance of quantum coherence from a new respect. We calculate the energy current in the EET and its quantumness, results for different system parameters are presented and discussed.
description: 14 pages, 7 figures
A thesis to be submitted to the Department of Medical Laboratory Sciences, School of Allied Health Sciences, and College of Health Science Addis Ababa University in Partial Fulfillment of the Requirements for the Degree Of Masters in Diagnostic and Public Health Microbiology
Creators: name: Nibret Mekuria (Bsc)
Publisher: name: Zenodo
Year: 2024

description: Background: Tuberculosis is an infectious disease caused by the bacillus Mycobacterium tuberculosis. The diagnosis of TB is highly relies sputum smear microscopy. It requires three sputum sample examinations over two days (conventional approach) and patient often abandons the diagnostic procedure owing to costs and inconvenience involved in multiple visits. The World Health Organization (WHO) recommends same day sputum microscopy (spot-spot) for the diagnosis of smear positive tuberculosis. As there is limited study on the same day sputum microscopy in our country this study aim to evaluate same day sputum smear performance for the detection of pulmonary and multi-drug resistance tuberculosis
Electronic Supplementary Tables from Masticatory biomechanics of red and grey squirrels (Sciurus vulgaris and S. carolinensis) modelled with multibody dynamics analysis
Creators: name: Cox, Philip G.
name: Watson, Peter J.
Publisher: name: The Royal Society
Year: 2023
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 110601 Biomechanics
subject: FOS: Health sciences

description: Percentage reduction in maximum incisor bite force with each pair of masticatory muscles set to zero activation
Lower bounds for nodal set of biharmonic Steklov problems
Creators: name: Chang, Jui-En
Publisher: name: arXiv
Year: 2015
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We use layer potential to establish that the boundary biharmonic Steklov operators are elliptic pseudo-differential operators. Thus we are able to establish lower bounds on both the measure of boundary nodal sets and interior nodal sets for biharmonic Steklov eigenfunctions.
Composite scalars at the LHC: the Higgs, the Sextet and the Octet
Creators: name: Cacciapaglia, Giacomo
name: Cai, Haiying
name: Deandrea, Aldo
name: Flacke, Thomas
name: Lee, Seung J.
name: Parolini, Alberto
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a phenomenological theory of scalar particles that transform as a sextet and an octet of QCD interactions. These particles may arise as light bound states of a fundamental dynamics giving rise to a composite Higgs boson and partial compositeness for the top. As a concrete example, we discuss an explicit UV completion based on the SU(4)/Sp(4) coset, where QCD colour is carried by additional fundamental fermions charged under the confining gauge group. Top partners, as well as potentially even lighter coloured scalars, arise as bound states of the coloured fermions. We study production and detection at LHC Run I and II of the octet and sextet, setting lower limits on masses and couplings to Standard Model particles using existing 8 TeV analyses. We finally explore prospects for the ongoing 13 TeV Run II: we focus on final states with two same sign leptons, that have the potential to discriminate the sextet.
description: 39 pages, 9 figures, 4 tables. Agrees with version published in JHEP. Changes w.r.t. v1: Fig. 1 added for illustration, U(1) charge in Tab. 1 corrected, references added
Fingerprints of the initial conditions on the density profiles of cold and warm dark matter haloes
Creators: name: Polisensky, E.
name: Ricotti, M.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We use N-body simulations of dark matter haloes in cold dark matter (CDM) and a large set of different warm dark matter (WDM) cosmologies to demonstrate that the spherically averaged density profile of dark matter haloes has a shape that depends on the power spectrum of matter perturbations. Density profiles are steeper in WDM but become shallower at scales less than one percent of the virial radius. Virialization isotropizes the velocity dispersion in the inner regions of the halo but does not erase the memory of the initial conditions in phase space. The location of the observed deviations from CDM in the density profile and in phase space can be directly related to the ratio between the halo mass and the filtering mass and are most evident in small mass haloes, even for a 34 keV thermal relic WDM. The rearrangement of mass within the haloes supports analytic models of halo structure that include angular momentum. We also find evidence of a dependence of the slope of the inner density profile in CDM cosmologies on the halo mass with more massive haloes exhibiting steeper profiles, in agreement with the model predictions and with previous simulation results. Our work complements recent studies of microhaloes near the filtering scale in CDM and strongly argue against a universal shape for the density profile.
description: 14 pages, 11 figures. Submitted to MNRAS 05/2014, accepted for publication 04/2015
RedRibbon: A new rank-rank hypergeometric overlap pipeline to compare gene and transcript expression signatures (code used to produce the results)
Creators: name: Piron, Anthony
name: Szymczak, Florian
name: Alvelos, Maria Inês
name: Defrance, Matthieu
name: Lenaerts, Tom
name: Eizirik, Décio L.
name: Cnop, Miriam
Publisher: name: Zenodo
Year: 2023

description: This upload contains the code to produce the figures and results of the manuscript "RedRibbon: A new rank-rank hypergeometric overlap pipeline to compare gene and transcript expression signatures".
On applicability of inhomogeneous diffusion approach to localized transport through disordered waveguides
Creators: name: Neupane, P.
name: Yamilov, A.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: In this work we show analytically and numerically that wave transport through random waveguides can be modeled as a diffusion with an inhomogeneous diffusion coefficient (IDC). In localized regime, IDC retains the memory of the source position. In an absorbing random medium, IDC becomes independent of the source.
description: 5 pages, 3 figures
Electronic Supplmental Material (Merged) from Sunflower sea star predation on urchins can facilitate kelp forest recovery
Creators: name: Galloway, A. W. E.
name: Gravem, S. A.
name: Kobelt, J. N.
name: Heady, W. N.
name: Okamoto, D. K.
name: Sivitilli, D. M.
name: Saccomanno, V. R.
name: Hodin, J.
name: Whippo, R.
Publisher: name: The Royal Society
Year: 2023
Subjects: subject: Ecology
subject: FOS: Biological sciences

description: 7 Figures, 5 Tables
Natureza e arte - atividades para educação ambiental
Creators: name: De Jesus, Rebeca Silva
Publisher: name: Zenodo
Year: 2023
Subjects: natureza, arte, flora, fauna, funga, educação ambiental

description: O que a arte tem a ver com a natureza? A natureza é muito representada na arte e estas representações podem revelar pistas sobre as relações que um individuo, grupo ou sociedade possuem com o meio ambiente. Além disso, a arte tem o poder de sensibilizar, encantar, chamar a atenção e influenciar as pessoas. Com base nesses aspectos, a cartilha "Natureza e arte - atividades para educação ambiental", utiliza estas características como recurso para apresentar e ensinar de maneira lúdica, por meio de atividades artísticas, alguns conceitos do pensamento ambiental e ecológico, bem como, problemas que afetam a conservação e a preservação dos fungos, animais e plantas, como a micofobia, a cegueira botânica e o desconhecimento dos brasileiros a respeito da fauna nativa.
Mixture models applied to heterogeneous populations
Creators: name: Cavalcante, Carolina Valani
name: Gonçalves, Kelly Cristina Mota
Publisher: name: arXiv
Year: 2015
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: Mixture models provide a flexible representation of heterogeneity in a finite number of latent classes. From the Bayesian point of view, Markov Chain Monte Carlo methods provide a way to draw inferences from these models. In particular, when the number of subpopulations is considered unknown, more sophisticated methods are required to perform Bayesian analysis. The Reversible Jump Markov Chain Monte Carlo is an alternative method for computing the posterior distribution by simulation in this case. Some problems associated with the Bayesian analysis of these class of models are frequent, such as the so-called "label-switching" problem. However, as the level of heterogeneity in the population increases, these problems are expected to become less frequent and the model's performance to improve. Thus, the aim of this work is to evaluate the normal mixture model fit using simulated data under different settings of heterogeneity and prior information about the mixture proportions. A simulation study is also presented to evaluate the model's performance considering the number of components known and estimating it. Finally, the model is applied to a censored real dataset containing antibody levels of Cytomegalovirus in individuals.
Supplementary data of replicates and information on antibodies used from Mechanical loading due to muscle movement regulates establishment of the collagen network in the developing murine skeleton
Creators: name: Ahmed, Saima
name: Rogers, Andrew V.
name: Nowlan, Niamh C.
Publisher: name: The Royal Society
Year: 2023
Subjects: Evolution of Developmental Systems
Agricultural Biotechnology not elsewhere classified

description: Mechanical loading is critical for collagen network maintenance and remodelling in adult skeletal tissues, but the role of loading in collagen network formation during development is poorly understood. We test the hypothesis that mechanical loading is necessary for the onset and maturation of spatial localization and structure of collagens in prenatal cartilage and bone, using in vivo and in vitro mouse models of altered loading. The majority of collagens studied was aberrant in structure or localization, or both, when skeletal muscle was absent in vivo. Using in vitro bioreactor culture system, we demonstrate that mechanical loading directly modulates the spatial localization and structure of collagens II and X. Furthermore, we show that mechanical loading in vitro rescues aspects of collagens II and X development from the effects of fetal immobility. In conclusion, our findings show that mechanical loading is a critical determinant of collagen network establishment during prenatal skeletal development. Teaser (One line): mechanical loading is required for normal establishment and maturation of key collagens during prenatal skeletal development.
Cosmological dynamics with non-minimally coupled scalar field and a constant potential function
Creators: name: Hrycyna, Orest
name: Szydlowski, Marek
Publisher: name: arXiv
Year: 2015
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Dynamical systems methods are used to investigate global behavior of the spatially flat Friedmann-Robertson-Walker cosmological model in gravitational theory with a non-minimally coupled scalar field and a constant potential function. We show that the system can be reduced to an autonomous three-dimensional dynamical system and additionally is equipped with an invariant manifold corresponding to an accelerated expansion of the universe. Using this invariant manifold we find an exact solution of the reduced dynamics. We investigate all solutions for all admissible initial conditions using theory of dynamical systems to obtain a classification of all evolutional paths. The right-hand sides of the dynamical system depend crucially on the value of the non-minimal coupling constant therefore we study bifurcation values of this parameter under which the structure of the phase space changes qualitatively. We found a special bifurcation value of the non-minimal coupling constant which is distinguished by dynamics of the model and may suggest some additional symmetry in matter sector of the theory.
description: 39 pages, 8 multiple figs; v2. 41 pages, 8 multiple figs. published version
Improvement of a quantum broadcasting multiple blind signature scheme based on quantum teleportation
Creators: name: Zhang, Wei
name: Qiu, Daowen
name: Zou, Xiangfu
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Recently, a broadcasting multiple blind signature scheme based on quantum teleportation has been proposed for the first time. It is claimed to have unconditional security and properties of quantum multiple signature and quantum blind signature. In this paper, we analyze the security of the protocol and show that the signatory Ui can learn the signed message m by a single particle measurement and the signed message m can be modified at random by anyone according to the scheme. Furthermore, there are some participant attacks and external attacks existing in the scheme. Finally we present an improved protocol and show that the improved scheme can resist all of the mentioned attacks. Meanwhile, the secret keys can be used again and again, which will make it more efficient and practical.
description: 22 pages
Quantum correlations from classically correlated states
Creators: name: Bellomo, Guido
name: Majtey, Ana P.
name: Plastino, A. R.
name: Plastino, A.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Consider a bipartite quantum system with at least one of its two components being itself a composite system. By tracing over part of one (or both) of these two subsystems it is possible to obtain a reduced (separable) state that exhibits quantum correlations even if the original state of the full system is endowed only with classical correlations. This effect, first pointed out by Li and Luo in (2008), is of considerable interest because there is a growing body of evidence suggesting that quantum correlations in non-entangled, mixed states may constitute a useful resource to implement non trivial information related tasks. Here we conduct a systematic exploration of the aforementioned effect for particular families of states of quantum systems of low dimensionality (three qubits states). In order to assess the non-classicality of the correlations of the reduced states we use an indicator of quantum correlations based upon the state disturbances generated by the measurement of local observables. We show, for a three-qubit system, that there exists a relationship between the classical mutual information of the original classically correlated states and the maximum quantum correlation exhibited by the reduced states.
description: 6 pages, 4 figures
Overview of the ABRomics database structure
Creators: name: LAO, Julie
name: MARIN, Pierre
name: BIRER, Aurélien
name: LECLERCQ, Sébastien
name: RUPPE, Etienne
name: BONNET, Richard
name: GLASER, Philippe
name: Médigue, Claudine
name: Consortium ABRomics
Publisher: name: Zenodo
Year: 2023
Subjects: database
antibiotic resistant gene
bacterial strain
metagenomic sample

description: Représentation schématique des tables de la base de données relationnelles ABRomics contenant les métadonnées des projets et des séquences, et les résultats de l'analyse des workflows Galaxy.
Cultural Clothe Customers: The Case of "Gundish Meda" Manufacturing and Marketing Center
Creators: name: Asrat Tesfaye
Publisher: name: Zenodo
Year: 2019

description: This study emphasizes the determinants of consumers purchase decision of cultural clothe customers in case of Gundish Meda Manufacturing and Marketing Center, in Addis Ababa, Ethiopia, by considering six independent variables- product, price, distribution channel and promotion, customer service and culture. The researcher used Descriptive, exploratory, quantitative and empirical research methods. Closed-end questionnaire was used in collecting data through convenience sampling from three hundred fifty one (351) customers and potential customers with a response rate of 91.40%. Research Data was analyzed to obtain descriptive statistics, normality test, reliability test and comparing inferential analyses (i.e. correlation analysis, multiple linear regressions, independent t-test and ANOVA) and other analyses with the aid of statistical package for social sciences (SPSS) version 20. According to the study findings, from all six factors included in the research, namely, Products, Customer Service, Price and Promotion were identified as critical factors that Consumers of cultural clothes perceive to be important in influencing their purchase decision towards Gundish Meda Manufacturing and Marketing Center.
Well-posedness and Finite Element Approximations for Elliptic SPDEs with Gaussian Noises
Creators: name: Cao, Yanzhao
name: Hong, Jialin
name: Liu, Zhihui
Publisher: name: arXiv
Year: 2015
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 60H35 (Primary) 65M60, 60H15 (Secondary)

description: The paper studies the well-posedness and optimal error estimates of spectral finite element approximations for the boundary value problems of semi-linear elliptic SPDEs driven by white or colored Gaussian noises. The noise term is approximated through the spectral projection of the covariance operator, which is not required to be commutative with the Laplacian operator. Through the convergence analysis of SPDEs with the noise terms replaced by the projected noises, the well-posedness of the SPDE is established under certain covariance operator-dependent conditions. These SPDEs with projected noises are then numerically approximated with the finite element method. A general error estimate framework is established for the finite element approximations. Based on this framework, optimal error estimates of finite element approximations for elliptic SPDEs driven by power-law noises are obtained. It is shown that with the proposed approach, convergence order of white noise driven SPDEs is improved by half for one-dimensional problems, and by an infinitesimal factor for higher-dimensional problems.
Calibrating the absolute amplitude scale for air showers measured at LOFAR
Creators: name: Nelles, A.
name: Hörandel, J. R.
name: Karskens, T.
name: Krause, M.
name: Buitink, S.
name: Corstanje, A.
name: Enriquez, J. E.
name: Erdmann, M.
name: Falcke, H.
name: Haungs, A.
name: Hiller, R.
name: Huege, T.
name: Krause, R.
name: Link, K.
name: Norden, M. J.
name: Rachen, J. P.
name: Rossetto, L.
name: Schellart, P.
name: Scholten, O.
name: Schröder, F. G.
name: ter Veen, S.
name: Thoudam, S.
name: Trinh, T. N. G.
name: Weidenhaupt, K.
name: Wijnholds, S. J.
name: Anderson, J.
name: Bähren, L.
name: Bell, M. E.
name: Bentum, M. J.
name: Best, P.
name: Bonafede, A.
name: Bregman, J.
name: Brouw, W. N.
name: Bruüggen, M.
name: Butcher, H. R.
name: Carbone, D.
name: Ciardi, B.
name: de Gasperin, F.
name: Duscha, S.
name: Eislöffel, J.
name: Fallows, R. A.
name: Frieswijk, W.
name: Garrett, M. A.
name: van Haarlem, M. P.
name: Heald, G.
name: Hoeft, M.
name: Horneffer, A.
name: Iacobelli, M.
name: Juette, E.
name: Karastergiou, A.
name: Kohler, J.
name: Kondratiev, V. I.
name: Kuniyoshi, M.
name: Kuper, G.
name: van Leeuwen, J.
name: Maat, P.
name: McFadden, R.
name: McKay-Bukowski, D.
name: Orru, E.
name: Paas, H.
name: Pandey-Pommier, M.
name: Pandey, V. N.
name: Pizzo, R.
name: Polatidis, A. G.
name: Reich, W.
name: Röttgering, H.
name: Schwarz, D.
name: Serylak, M.
name: Sluman, J.
name: Smirnov, O.
name: Tasse, C.
name: Toribio, M. C.
name: Vermeulen, R.
name: van Weeren, R. J.
name: Wijers, R. A. M. J.
name: Wucknitz, O.
name: Zarka, P.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Air showers induced by cosmic rays create nanosecond pulses detectable at radio frequencies. These pulses have been measured successfully in the past few years at the LOw Frequency ARray (LOFAR) and are used to study the properties of cosmic rays. For a complete understanding of this phenomenon and the underlying physical processes, an absolute calibration of the detecting antenna system is needed. We present three approaches that were used to check and improve the antenna model of LOFAR and to provide an absolute calibration of the whole system for air shower measurements. Two methods are based on calibrated reference sources and one on a calibration approach using the diffuse radio emission of the Galaxy, optimized for short data-sets. An accuracy of 19% in amplitude is reached. The absolute calibration is also compared to predictions from air shower simulations. These results are used to set an absolute energy scale for air shower measurements and can be used as a basis for an absolute scale for the measurement of astronomical transients with LOFAR.
description: 34 pages, 10 figures
A discrete-pulse optimal control algorithm with an application to spin systems
Creators: name: Dridi, G.
name: Lapert, M.
name: Salomon, Julien
name: Sugny, D
name: Glaser, S. J.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: This article is aimed at extending the framework of optimal control techniques to the situation where the control field values are restricted to a finite set. We propose a generalization of the standard GRAPE algorithm suited to this constraint. We test the validity and the efficiency of this approach for the inversion of an inhomogeneous ensemble of spin systems with different offset frequencies. It is shown that a remarkable efficiency can be achieved even for a very limited number of discrete values. Some applications in Nuclear Magnetic Resonance are discussed.
Supplementary Table and Figures from A well-preserved ‘placoderm’ (stem-group Gnathostomata) upper jaw from the Early Devonian of Mongolia clarifies jaw evolution
Creators: name: Brazeau, Martin D.
name: Yuan, Haobo
name: Giles, Sam
name: Jerve, Anna L.
name: Zorig, E.
name: Ariunchimeg, Ya.
name: Sansom, Robert S.
name: Atwood, Robert
Publisher: name: The Royal Society
Year: 2023
Subjects: subject: 40308 Palaeontology (incl. Palynology)
subject: FOS: Earth and related environmental sciences

description: Supplementary Table and Figures for A well-preserved ‘placoderm’ (Stem-group Gnathostomata) upper jaw from the Early Devonian of Mongolia clarifies jaw evolution
RedRibbon: A new rank-rank hypergeometric overlap pipeline to compare gene and transcript expression signatures (code and data used to produce the results)
Creators: name: Piron, Anthony
name: Szymczak, Florian
name: Papadopoulou, Theodora
name: Alvelos, Maria Inês
name: Defrance, Matthieu
name: Lenaerts, Tom
name: Eizirik, Décio L.
name: Cnop, Miriam
Publisher: name: Zenodo
Year: 2023

description: This upload contains the code to produce the figures and results of the manuscript "RedRibbon: A new rank-rank hypergeometric overlap pipeline to compare gene and transcript expression signatures".
Shapes From Pixels
Creators: name: Fatemi, Mitra
name: Amini, Arash
name: Baboulaz, Loic
name: Vetterli, Martin
Publisher: name: arXiv
Year: 2015
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Continuous-domain visual signals are usually captured as discrete (digital) images. This operation is not invertible in general, in the sense that the continuous-domain signal cannot be exactly reconstructed based on the discrete image, unless it satisfies certain constraints (\emph{e.g.}, bandlimitedness). In this paper, we study the problem of recovering shape images with smooth boundaries from a set of samples. Thus, the reconstructed image is constrained to regenerate the same samples (consistency), as well as forming a shape (bilevel) image. We initially formulate the reconstruction technique by minimizing the shape perimeter over the set of consistent binary shapes. Next, we relax the non-convex shape constraint to transform the problem into minimizing the total variation over consistent non-negative-valued images. We also introduce a requirement (called reducibility) that guarantees equivalence between the two problems. We illustrate that the reducibility property effectively sets a requirement on the minimum sampling density. One can draw analogy between the reducibility property and the so-called restricted isometry property (RIP) in compressed sensing which establishes the equivalence of the $\ell_0$ minimization with the relaxed $\ell_1$ minimization. We also evaluate the performance of the relaxed alternative in various numerical experiments.
description: 13 pages, 14 figures
Optimizing oil-water separation using fractal surfaces
Creators: name: Gavazzoni, Cristina
name: Lazzari, Davi
name: Ramos, Iara Patrícia da Silva
name: Brito, Carolina
Publisher: name: arXiv
Year: 2025
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Oil has become a prevalent global pollutant, stimulating the research to improve the techniques to separate oil from water. Materials with special wetting properties - primarily those that repel water while attracting oil - have been proposed as suitable candidates for this task. However, one limitation in developing efficient substrates is the limited available volume for oil absorption. In this study we investigate the efficacy of disordered fractal materials in addressing this challenge, leveraging their unique wetting properties. Using a combination of a continuous model and Monte Carlo simulations, we characterize the hydrophobicity and oleophilicity of substrates created through ballistic deposition (BD). Our results demonstrate that these materials exhibit high contact angles for water, confirming their hydrophobic nature, while allowing significant oil penetration, indicative of oleophilic behavior. The available free volume within the substrates vary from $60\%$ to $90\%$ of the total volume of the substrate depending on some parameters of the BD. By combining their water and oil wetting properties with a high availability of volume, the fractal substrates analyzed in this work achieve an efficiency in separating oil from water of nearly $98\%$, which is significantly higher compared to a micro-pillared surfaces made from the same material but lacking a fractal design.
description: 7 pages, 5 figures. arXiv admin note: text overlap with arXiv:2012.11562
The VLT-FLAMES Tarantula Survey. XXIII: two massive double-lined binaries in 30~Doradus
Creators: name: Howarth, Ian D.
name: Dufton, P. L.
name: Dunstall, P. R.
name: Evans, C. J.
name: Almeida, L. A.
name: Bonanos, A. Z.
name: Clark, J. S.
name: Langer, N.
name: Sana, H.
name: Simon-Diaz, S.
name: Soszynski, I.
name: Taylor, W. D.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We investigate the characteristics of two newly discovered short-period, double-lined, massive binary systems, VFTS 450 (O9.7$\;$II--Ib$\,$+$\,$O7::) and VFTS 652 (B1$\;$Ib$\,+\,$O9:$\;$III:). We perform model-atmosphere analyses to characterise the photospheric properties of both members of each binary (denoting the `primary' as the spectroscopically more conspicuous component). Radial velocities and optical photometry are used to estimate the binary-system parameters. We estimate $T_{\rm eff}=27$ kK, $\log{(g)}=2.9$ (cgs) for the VFTS 450 primary spectrum (34kK, 3.6: for the secondary spectrum); and $T_{\rm eff} = 22$kK, $\log{(g)}=2.8$ for the VFTS 652 primary spectrum (35kK, 3.7: for the secondary spectrum). Both primaries show surface nitrogen enrichments (of more than 1 dex for VFTS 652), and probable moderate oxygen depletions relative to reference LMC abundances. We determine orbital periods of 6.89d and 8.59d for VFTS 450 and VFTS 652, respectively, and argue that the primaries must be close to filling their Roche lobes. Supposing this to be the case, we estimate component masses in the range $\sim$20--50M$_\odot$. The secondary spectra are associated with the more massive components, suggesting that both systems are high-mass analogues of classical Algol systems, undergoing case-A mass transfer. Difficulties in reconciling the spectroscopic analyses with the light-curves and with evolutionary considerations suggest that the secondary spectra are contaminated by (or arise in) accretion disks.
TRAIN OPERATION SYSTEM DEVELOPMENT FOR ADDIS ABABA LIGHT RAIL TRANSIT
Creators: name: Befikadu Diro
Publisher: name: Zenodo
Year: 2014

description: This research paper mainly deals with the train operation system development for railway

transport of Addis Ababa LRT. The prime justification for the introduction of a Light Rail

System in Addis Ababa is the provision of major improvements to public transport in the city,

particularly with reference to greatly increased carrying capacity, reduced pollution and

improved the service of operation. To achieve this, system analysis approach is presented for the

investigation of train operations in railway stations and routes based on demand, network,

timetable (train schedule), and rolling stock and crew analysis data. Network and train schedule

analysis are the main focus of this paper which are solved using a simulation model programmer

language Arena5. The simulation model is formulated in the way that it represents the

appropriate actual working system of the Addis Ababa LRT.
First detections of 610 MHz radio emission from hot magnetic stars
Creators: name: Chandra, P.
name: Wade, G. A.
name: Sundqvist, J. O.
name: Oberoi, D.
name: Grunhut, J. H.
name: ud-Doula, A.
name: Petit, V.
name: Cohen, D. H.
name: Oksala, M. E.
name: David-Uraz, A.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We have carried out a study of radio emission from a small sample of magnetic O- and B-type stars using the Giant Metrewave Radio Telescope, with the goal of investigating their magnetospheres at low frequencies. These are the lowest frequency radio measurements ever obtained of hot magnetic stars. The observations were taken at random rotational phases in the 1390 and the 610 MHz bands. Out of the 8 stars, we detect five B-type stars in both the 1390 and the 610 MHz bands. The O-type stars were observed only in the 1390 MHz band, and no detections were obtained. We explain this result as a consequence of free-free absorption by the free-flowing stellar wind exterior to the closed magnetosphere. We also study the variability of individual stars. One star - HD 133880 - exhibits remarkably strong and rapid variability of its low frequency flux density. We discuss the possibility of this emission being coherent emission as reported for CU Vir by Trigilio et al. (2000).
description: 9 pages, 4 figures, 4 tables, submitted to MNRAS
Max-Min Diversification with Asymmetric Distances
Creators: name: Kumpulainen, Iiro
name: Adriaens, Florian
name: Tatti, Nikolaj
Publisher: name: arXiv
Year: 2025
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences

description: One of the most well-known and simplest models for diversity maximization is the Max-Min Diversification (MMD) model, which has been extensively studied in the data mining and database literature. In this paper, we initiate the study of the Asymmetric Max-Min Diversification (AMMD) problem. The input is a positive integer $k$ and a complete digraph over $n$ vertices, together with a nonnegative distance function over the edges obeying the directed triangle inequality. The objective is to select a set of $k$ vertices, which maximizes the smallest pairwise distance between them. AMMD reduces to the well-studied MMD problem in case the distances are symmetric, and has natural applications to query result diversification, web search, and facility location problems. Although the MMD problem admits a simple $\frac{1}{2}$-approximation by greedily selecting the next-furthest point, this strategy fails for AMMD and it remained unclear how to design good approximation algorithms for AMMD. We propose a combinatorial $\frac{1}{6k}$-approximation algorithm for AMMD by leveraging connections with the Maximum Antichain problem. We discuss several ways of speeding up the algorithm and compare its performance against heuristic baselines on real-life and synthetic datasets.
Homotopy theory of symmetric powers
Creators: name: Pavlov, Dmitri
name: Scholbach, Jakob
Publisher: name: arXiv
Year: 2015
Subjects: subject: Algebraic Topology (math.AT)
subject: Category Theory (math.CT)
subject: K-Theory and Homology (math.KT)
subject: FOS: Mathematics
subject: 55U35, 18G55, 55U40 (Primary), 55P48, 18D50, 55P43, 55U10, 55U15

description: We introduce the symmetricity notions of symmetric h-monoidality, symmetroidality, and symmetric flatness. As shown in our paper arXiv:1410.5675, these properties lie at the heart of the homotopy theory of colored symmetric operads and their algebras. In particular, the former property can be seen as the analog of Schwede and Shipley's monoid axiom for algebras over symmetric operads and allows one to equip categories of such algebras with model structures, whereas the latter ensures that weak equivalences of operads induce Quillen equivalences of categories of algebras. We discuss these properties for elementary model categories such as simplicial sets, simplicial presheaves, and chain complexes. Moreover, we provide powerful tools to promote these properties from such basic model categories to more involved ones, such as the stable model structure on symmetric spectra.
description: 25 pages. Comments and questions are very welcome. This article splits off for publication purposes the first 7 sections of arXiv:1410.5675v1. v2: Added the notion of a strongly admissibly generated model category. v3: Identical to the journal version except for formatting and style
Modelling solar low-lying cool loops with optically thick radiative losses
Creators: name: Sasso, C.
name: Andretta, V.
name: Spadaro, D.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We investigate the increase of the DEM (differential emission measure) towards the chromosphere due to small and cool magnetic loops (height $\lesssim8$~Mm, $T\lesssim10^5$~K). In a previous paper we analysed the conditions of existence and stability of these loops through hydrodynamic simulations, focusing on their dependence on the details of the optically thin radiative loss function used. In this paper, we extend those hydrodynamic simulations to verify if this class of loops exists and it is stable when using an optically thick radiative loss function. We study two cases: constant background heating and a heating depending on the density. The contribution to the transition region EUV output of these loops is also calculated and presented. We find that stable, quasi-static cool loops can be obtained by using an optically thick radiative loss function and a background heating depending on the density. The DEMs of these loops, however, fail to reproduce the observed DEM for temperatures between $4.6
description: Accepted for publication in A&A on Aug 21st 2015. arXiv admin note: text overlap with arXiv:1112.0309