cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Gender earnings wage differential in the Ethiopian public sector
Creators: name: Yuya, Abdi
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2008

description: I would like to express my sincere thanks, deep sense of gratitude and indebtedness to my adviser Professor Teshome Mulat for his keen interest, valuable guidance, and sustained help for the completion of this thesis. I am grateful to the graduate school of Addis Ababa University for financing this thesis. I am also delighted to express my heart felt gratitude and sincere thanks to my dear wife Ajiba Mohammed, my brother Ato Ahmed Yuya, and my friend Fuad Usmail for their unfailing support and moral encouragement throughout my study time. I am thankful to my friend Malaku Teklea for his relentless cooperation in searching documents and data management. My heart felt thank also extends to the Federal and Oromia Civil Service Commissions, UNECA library, Central Statistical Agency, and Ministry of Education for providing the required data and documents. My special thanks also go to Ato Tekalign Birhane, the commissioner of the Oromia Civil Service Commission, for his invaluable support. I am thankful to the Oromia Ethics and Anti Corruption Commission for sponsoring my study and to w/o Aberash Tamiru for typing this thesis in an attractive manner. Finally, I would like to notify that any unintentional omission in this brief acknowledgement does not mean lack of gratitude.
Graviton resonance phenomenology and a pNGB Higgs at the LHC
Creators: name: Alvarez, Ezequiel
name: Da Rold, Leandro
name: Mazzitelli, Javier
name: Szynkman, Alejandro
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present an effective description of a spin two massive state and a pseudo Nambu-Goldstone boson Higgs in a two site model. Using this framework we model the spin two state as a massive graviton and we study its phenomenology at the LHC. We find that a reduced set of parameters can describe the most important features of this scenario. We address the question of which channel is the most sensitive to detect this graviton. Instead of designing search strategies to estimate the significance in each channel, we compare the ratio of our theoretical predictions to the limits set by available experimental searches for all the decay channels and as a function of the free parameters in the model. We discuss the phenomenological details contained in the outcome of this simple procedure. The results indicate that, for the studied masses between 0.5 and 3 TeV, the channels to look for such a graviton resonance are mainly $ZZ$, $WW$ and $γγ$. This is the case even though top and bottom quarks dominate the branching ratios, since their experimental sensitivity is not as good as the one of the electro-weak gauge bosons. We find that as the graviton mass increases, the $ZZ$ and $WW$ channels become more important because of its relatively better enhancement over background, mainly due to fat jet techniques. We determine the region of the parameter space that has already been excluded and the reach for the LHC next stages. We also estimate the size of the loop-induced contributions to the production and decay of the graviton, and show in which region of the parameter space their effects are relevant for our analysis.
description: This article is inspired by our recent submission 1606.05326 on the 750 GeV diphoton resonance. We have kept the intrinsic results (theory of a graviton and a pNGB Higgs) which are relevant independently of the existence of the specific resonance, and we have added a whole new phenomenological analysis for a massive spin 2 particle at the LHC
Approaches to analysis with infinitesimals following Robinson, Nelson, and others
Creators: name: Fletcher, Peter
name: Hrbacek, Karel
name: Kanovei, Vladimir
name: Katz, Mikhail G.
name: Lobry, Claude
name: Sanders, Sam
Publisher: name: arXiv
Year: 2017
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Mathematical Physics (math-ph)
subject: Differential Geometry (math.DG)
subject: History and Overview (math.HO)
subject: Logic (math.LO)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: This is a survey of several approaches to the framework for working with infinitesimals and infinite numbers, originally developed by Abraham Robinson in the 1960s, and their constructive engagement with the Cantor-Dedekind postulate and the Intended Interpretation hypothesis. We highlight some applications including (1) Loeb's approach to the Lebesgue measure, (2) a radically elementary approach to the vibrating string, (3) true infinitesimal differential geometry. We explore the relation of Robinson's and related frameworks to the multiverse view as developed by Hamkins. Keywords: axiomatisations, infinitesimal, nonstandard analysis, ultraproducts, superstructure, set-theoretic foundations, multiverse, naive integers, intuitionism, soritical properties, ideal elements, protozoa.
description: 54 pages, to appear in Real Analysis Exchange
Experiencias de desarrollo profesional docente en América Latina en contextos COVID-19 y su vinculación con tecnologías digitales
Creators: name: Castillo-Canales, Dante
name: Lagos-Mancilla, Andrea
name: Gonzalez, Alvaro
name: Cuellar, Carolina
name: Queupil, Juna Pablo
name: Hernández, Macarena
name: Guzmán, María Angélica
name: Cuadros, Olga
Publisher: name: Zenodo
Year: 2021
Subjects: Desarrollo Profesional Docente
Tecnologías Digitales
Innovación
América Latina
COVID-19

description: La expansión del Covid-19 ha significado una disrupción de gran envergadura en los sistemas educativos alrededor del mundo, siendo el cierre de escuelas la principal respuesta adoptada por los países, que ha impactado al 94% de la población escolar a nivel global (United Nations, 2020). En el caso de América Latina, todos los países, con la única excepción de Nicaragua, decretaron en el mes de marzo del año 2020 el cierre de los centros educativos y la suspensión de las clases presenciales (CEPAL-UNESCO, 2020). La pandemia ofrece un espacio para promover cambios e innovaciones en la práctica educativa. La evidencia muestra un activo nivel de innovación en las formas de desarrollo profesional docente precipitadas por la crisis sanitaria. Resulta importante indagar a nivel regional sobre el modo en que los docentes de América Latina han construido procesos de aprendizaje profesional durante el período de educación remota provocado por la pandemia y cómo se relaciona este aprendizaje profesional con las tecnologías digitales disponibles en distintos contextos de la región. Este reporte, usando un enfoque cualitativo, muestra las experiencias de diversos países de América Latina en sus procesos de aprendizaje profesional mediado por tecnologías digitales.
A Committee of Convolutional Neural Networks for Image Classication in the Concurrent Presence of Feature and Label Noise
Creators: name: Kaźmierczak, Stanisław
name: Mańdziuk, Jacek
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Image classification has become a ubiquitous task. Models trained on good quality data achieve accuracy which in some application domains is already above human-level performance. Unfortunately, real-world data are quite often degenerated by the noise existing in features and/or labels. There are quite many papers that handle the problem of either feature or label noise, separately. However, to the best of our knowledge, this piece of research is the first attempt to address the problem of concurrent occurrence of both types of noise. Basing on the MNIST, CIFAR-10 and CIFAR-100 datasets, we experimentally proved that the difference by which committees beat single models increases along with noise level, no matter it is an attribute or label disruption. Thus, it makes ensembles legitimate to be applied to noisy images with noisy labels. The aforementioned committees' advantage over single models is positively correlated with dataset difficulty level as well. We propose three committee selection algorithms that outperform a strong baseline algorithm which relies on an ensemble of individual (nonassociated) best models.
Erhebung des technischen Selbstkonzepts von Grundschulkindern
Creators: name: Adenstedt, Victoria
Publisher: name: Journal of Technical Education (JOTED)
Year: 2016

description: In einer technisierten Lebens- und Arbeitswelt nimmt die Entwicklung einer technikmündigen Gesellschaft eine zentrale Rolle ein. Mangelnde Erfahrungen mit Technik haben aber unzutreffende Einschätzungen der eigenen Fähig- und Fertigkeiten zur Folge, sodass sich ein negatives technisches Selbstkonzept entwickelt und der Umgang mit dieser vermieden wird. Schulische Bildung könnte durch die Ausbildung technischer Kompetenzen und eines positiven technischen Selbstkonzepts einem technischen Analphabetismus entgegenwirken. Solche Selbstkonzepte scheinen sich besonders im Grundschulalter zu entwickeln. In diesem Beitrag wird das Dissertationsvorhaben zur Erhebung des technischen Selbstkonzepts von GrundÂ­schülern vorgestellt. Der Fokus liegt hierbei auf der Entwicklung eines Erhebungsinstruments. Schlüsselwörter: Technisches Selbstkonzept, technische Bildung, Ist-Standserhebung, Messinstrument
description: Journal of Technical Education (JOTED), Bd. 4 Nr. 2 (2016): Journal of Technical Education (JOTED)
Caucasian Entomological Bulletin, vol. 18, iss. 2
Creators: name: M.V. Nabozhenko, editor-in-chief
Publisher: name: Zenodo
Year: 2022

description: The volume 18, issue 2 of the journal "Caucasian Entomological Bulletin" (166 pp.) contains 20 research articles and 3 short communications. This issue includes papers on taxonomy, faunistics and ecology of Coleoptera (Scirtidae, Scarabaeidae, Staphylinidae, Tenebrionidae, Nitidulidae, Chrysomelidae, Atellabidae, Curculionidae, Cerambycidae), Diptera (many families), Thysanoptera (Thripidae), Lepidoptera (Papilionoidea, Crambidae), Diptera (Dolichopodidae), Plecoptera, Aranei from the following regions: Russia (Crimea, Caucasus, Siberia), Belarus, Transcaucasia, Kazakhstan, Tajikistan, Turkmenistan, China, Malaysia, Indonesia, Turkey. In total, one new genus, one new subgenus, and 15 new recent and 1 fossil species of Coleoptera, Diptera and Aranei are described in the journal.
Non-destructive monitoring of Bloch oscillations in an optical cavity
Creators: name: Keßler, H.
name: Klinder, J.
name: Venkatesh, B. P.
name: Georges, Ch.
name: Hemmerich, A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Bloch oscillations are a hallmark of coherent wave dynamics in periodic potentials. They occur as the response of quantum mechanical particles in a lattice if a weak force is applied. In optical lattices with their perfect periodic structure they can be readily observed and employed as a quantum mechanical force sensor, for example, for precise measurements of the gravitational acceleration. However, the destructive character of the measurement process in previous experimental implementations poses serious limitations for the precision of such measurements. In this article we show that the use of an optical cavity operating in the regime of strong cooperative coupling allows one to directly monitor Bloch oscillations of a cloud of cold atoms in the light leaking out of the cavity. Hence, with a single atomic sample the Bloch oscillation dynamics can be mapped out, while in previous experiments, each data point required the preparation of a new atom cloud. The use of a cavity-based monitor should greatly improve the precision of Bloch oscillation measurements for metrological purposes.
description: 4 pages, 3 figures
Schreiben im Technikunterricht: Untersuchung zum textsortenbasierten Schreiben am Beispiel der Technischen Analyse
Creators: name: Schniederjan, Michaela
name: Lang, Martin
Publisher: name: Journal of Technical Education (JOTED)
Year: 2016

description: Basierend auf den Ergebnissen einer Teilstichprobe von 338 Schülerinnen und Schülern im vom BMBF geförderten Projekt SchriFT (Schreiben im Fachunterricht der Sekundarstufe I unter Einbeziehung des Türkischen) wird für das Fach Technik am Beispiel der Textsorte Technische Analyse erläutert, welche Zusammenhänge zwischen technischer Fachkompetenz und allgemein- und bildungssprachlicher Kompetenz im Deutschen bestehen und wie sich daraus fachliche und sprachliche Fähigkeiten bezüglich der Textsortenkompetenz unter Berücksichtigung weiterer möglicher Einflussgrößen bedingen. Aus den Erkenntnissen können Möglichkeiten erarbeitet werden, wie das förderliche Schreiben sinnvoll in den Fachunterricht Technik implementiert werden kann. Schlüsselwörter: sprachsensibler Fachunterricht, Technische Analyse, Textsortenkompetenz, Migrationshintergrund
description: Journal of Technical Education (JOTED), Bd. 4 Nr. 2 (2016): Journal of Technical Education (JOTED)
Homology-Preserving Multi-Scale Graph Skeletonization Using Mapper on Graphs
Creators: name: Rosen, Paul
name: Hajij, Mustafa
name: Wang, Bei
Publisher: name: arXiv
Year: 2018
Subjects: subject: Social and Information Networks (cs.SI)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Node-link diagrams are a popular method for representing graphs that capture relationships between individuals, businesses, proteins, and telecommunication endpoints. However, node-link diagrams may fail to convey insights regarding graph structures, even for moderately sized data of a few hundred nodes, due to visual clutter. We propose to apply the mapper construction -- a popular tool in topological data analysis -- to graph visualization, which provides a strong theoretical basis for summarizing the data while preserving their core structures. We develop a variation of the mapper construction targeting weighted, undirected graphs, called {\mog}, which generates homology-preserving skeletons of graphs. We further show how the adjustment of a single parameter enables multi-scale skeletonization of the input graph. We provide a software tool that enables interactive explorations of such skeletons and demonstrate the effectiveness of our method for synthetic and real-world data.
Foreign Direct Investment and Uncertainty in Africa
Creators: name: Andargie, Ephrem
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2012

description: In the past two decades, there has been a significant increase of FDI flow to all developing countries. However, Africa still lags behind in the attraction of this investment. Why African has received a little FDI inflows as compared to other developing countries is the starting question of this study. Theories suggest that the prevailed uncertainty in Africa is considered as a reason for the poor FDI attractions. Having this concept, the paper examines weather macroeconomic uncertainty and political instability affect inflow of foreign direct investment (FDI) to Africa. The study estimates both fixed and dynamic GMM Panel-data models using data from 25 African countries over the period 1995 to 2009. Unconditional standard deviations are applied to capture macroeconomic volatility and state fragility indices are taken to measure political instability and institutional strength towards corruption. We find that macroeconomic volatility proxied by inflation has a deleterious impact on FDI inflows to Africa while exchange rate volatility has no statistical significance. We also find that level of corruption and political instability are not statistical significance Key word: FDI, Macroeconomic Uncertainty, Political instability and co
Normal bases for modular function fields
Creators: name: Koo, Ja Kyung
name: Shin, Dong Hwa
name: Yoon, Dong Sung
Publisher: name: arXiv
Year: 2016
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: Primary 11F03, Secondary 11G16

description: We provide a concrete example of a normal basis for a finite Galois extension which is not abelian. More precisely, let $\mathbb{C}(X(N))$ be the field of meromorphic functions on the modular curve $X(N)$ of level $N$. We construct a completely free element in the extension $\mathbb{C}(X(N))/\mathbb{C}(X(1))$ by means of Siegel functions.
description: 8 pages
Optimum conditions for high speed injection moulding of polypropylene thin-walled cups
Creators: name: Benetti, Adrian.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Richtig Handeln in Entscheidungssituationen des Technikunterrichts - Instrumentenkonstruktion und empirische Befunde professioneller Unterrichtswahrnehmung
Creators: name: Goreth, Sebastian
name: Rehm, Markus
name: Geißel, Bernd
Publisher: name: Journal of Technical Education (JOTED)
Year: 2016

description: Aktuell wird als wesentlicher Aspekt professioneller Lehrerkompetenz in der empirischen Bildungsforschung der Bereich der professionellen Unterrichtswahrnehmung diskutiert. Neben den Facetten content knowledge (CK), general pedagogical knowledge (PPK) sowie pedagogical content knowledge (PCK), werden in derzeitigen Modellen der Prozess des Unterrichtens unter Bezugnahme von Vorstellungen zum Lehren und Lernen sowie den Erfahrungen von Lehrpersonen erweitert. Dieser Beitrag skizziert die Entwicklung eines quantitativ angelegten vignettengestützten Testinstruments sowie deren Normwertgewinnung und fokussiert Ergebnisse einer Querschnittstudie (N=350) von Studierenden unter-schiedlicher Expertise. Es kann gezeigt werden, dass ein Instrument für eine ausreichend sensible Differenzierung zwischen verschiedenen Studierendengruppen herangezogen werden kann und dabei einen Anstieg über den Verlauf des Studiums abbildet. Schlüsselwörter: Professionelle Unterrichtswahrnehmung, Vignettentest, fachdidaktische Lehrkompetenzen, PCK-T
description: Journal of Technical Education (JOTED), Bd. 4 Nr. 2 (2016): Journal of Technical Education (JOTED)
All silicon Josephson junctions
Creators: name: Chiodi, F.
name: Duvauchelle, J. -E.
name: Marcenat, C.
name: Débarre, D.
name: Lefloch, F.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We have realised laser-doped all-silicon superconducting (S)/ normal metal (N) bilayers of tunable thickness and dopant concentration. We observed a strong reduction of the bilayers critical temperature when increasing the normal metal thickness, a signature of the highly transparent S/N interface associated to the epitaxial sharp laser doping profile. We extracted the interface resistance by fitting with the linearised Usadel equations, demonstrating a reduction of one order of magnitude from previous superconductor/doped Si interfaces. In this well controlled crystalline system we exploited the low resistance S/N interfaces to elaborate all-silicon lateral SNS Josephson junctions with long range proximity effect. Their dc transport properties, such as the critical and retrapping currents, could be well understood in the diffusive regime. Furthermore, this work lead to the estimation of important parameters in ultra-doped superconducting Si, such as the Fermi velocity, the coherence length, or the electron-phonon coupling constant, fundamental to conceive an all-silicon superconducting electronics.
description: 6 pages, 7 figures
A new geometric structure on tangent bundles
Creators: name: Georgiou, Nikos
name: Guilfoyle, Brendan
Publisher: name: arXiv
Year: 2018
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: For a Riemannian manifold $(N,g)$, we construct a scalar flat metric $G$ in the tangent bundle $TN$. It is locally conformally flat if and only if either, $N$ is a 2-dimensional manifold or, $(N,g)$ is a real space form. It is also shown that $G$ is locally symmetric if and only if $g$ is locally symmetric. We then study submanifolds in $TN$ and, in particular, find the conditions for a curve to be geodesic. The conditions for a Lagrangian graph to be minimal or Hamiltonian minimal in the tangent bundle $T{\mathbb R}^n$ of the Euclidean real space ${\mathbb R}^n$ are studied. Finally, using the cross product in ${\mathbb R}^3$ we show that the space of oriented lines in ${\mathbb R}^3$ can be minimally isometrically embedded in $T{\mathbb R}^3$.
description: 23 pages, AMS-Tex
Symmetric approximation sequences, Beilinson-Green algebras and derived equivalences
Creators: name: Pan, Shengyong
Publisher: name: arXiv
Year: 2019
Subjects: subject: Representation Theory (math.RT)
subject: Category Theory (math.CT)
subject: K-Theory and Homology (math.KT)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics

description: In this paper, we will consider a class of locally $Φ$-Beilinson-Green algebras, where $Φ$ is an infinite admissible set of the integers, and show that symmetric approximation sequences in $n$-exangulated categories give rise to derived equivalences between quotient algebras of locally $Φ$-Beilinson-Green algebras in the principal diagonals modulo some factorizable ghost and coghost ideals by the locally finite tilting family. Then we get a class of derived equivalent algebras that have not been obtained by using previous techniques. From higher exact sequences, we obtain derived equivalences between subalgebras of endomorphism algebras by constructing tilting complexes, which generalizes Chen and Xi's result for exact sequences. From a given derived equivalence, we get derived equivalences between locally $Φ$-Beilinson-Green algebras of semi-Gorenstein modules. Finally, from given graded derived equivalences of group graded algebras, we get derived equivalences between associated Beilinson-Green algebras of group graded algebras.
description: Welcome to give comments. Fix some errors. Math. Scand to appear
Electron heating and mechanical properties of graphene
Creators: name: Silva-Guillén, Jose Angel
name: Guinea, Francisco
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The heating of electrons in graphene by laser irradiation, and its effects on the lattice structure, are studied. Values for the temperature of the electron system in realistic situations are obtained. For sufficiently high electron temperatures, the occupancy of the states in the $σ$ band of graphene is modified. The strength of the carbon-carbon bonds changes, leading to the emergence of strains, and to buckling in suspended samples. While most applications of `strain engineering' in two dimensional materials focus on the effects of strains on electronic properties, the effect studied here leads to alterations of the structure induced by light. This novel optomechanical coupling can induce deflections in the order of $\sim 50$ nm in micron size samples.
Buoyancy-driven exchange flows in inclined ducts
Creators: name: Lefauve, Adrien
name: Linden, P. F.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Buoyancy-driven exchange flows arise in the natural and built environment wherever bodies of fluids at different densities are connected by a narrow constriction. In this paper we study these flows in the laboratory using the canonical stratified inclined duct experiment, which sustains an exchange flow in an inclined duct of rectangular cross-section over long time periods (Meyer & Linden, J. Fluid Mech., vol. 753, 2014). We study the behaviour of these sustained stratified shear flows by focusing on three dependent variables of particular interest: the qualitative flow regime (laminar, wavy, intermittently turbulent, or fully turbulent), the mass flux (net transport of buoyancy between reservoirs), and the interfacial thickness (thickness of the layer of intermediate density between the two counter-flowing layers). Dimensional analysis reveals five non-dimensional independent input parameters: the duct aspect ratios in the longitudinal direction $A$ and spanwise direction $B$, the tilt angle $θ$, the Reynolds number $Re$ (based on the initial buoyancy difference driving the flow), and the Prandtl number $Pr$ (we consider both salt and temperature stratifications). After reviewing the literature and open questions on the scaling of regimes, mass flux, and interfacial thickness with $A,B,θ,Re,Pr$, we present the first extensive, unified set of experimental data where we varied systematically all five input parameters and measured all three output variables with the same methodology. Our results in the $(θ,Re)$ plane for five sets of $(A,B,Pr)$ reveal a variety of scaling laws, and a non-trivial dependence of all three variables on all five parameters, in addition to a sixth elusive parameter. We further develop three classes of candidate models to explain the observed scaling laws: ...
BasicBlocker: ISA Redesign to Make Spectre-Immune CPUs Faster
Creators: name: Thoma, Jan Philipp
name: Feldtkeller, Jakob
name: Krausz, Markus
name: Güneysu, Tim
name: Bernstein, Daniel J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cryptography and Security (cs.CR)
subject: Hardware Architecture (cs.AR)
subject: FOS: Computer and information sciences

description: Recent research has revealed an ever-growing class of microarchitectural attacks that exploit speculative execution, a standard feature in modern processors. Proposed and deployed countermeasures involve a variety of compiler updates, firmware updates, and hardware updates. None of the deployed countermeasures have convincing security arguments, and many of them have already been broken. The obvious way to simplify the analysis of speculative-execution attacks is to eliminate speculative execution. This is normally dismissed as being unacceptably expensive, but the underlying cost analyses consider only software written for current instruction-set architectures, so they do not rule out the possibility of a new instruction-set architecture providing acceptable performance without speculative execution. A new ISA requires compiler and hardware updates, but these are happening in any case. This paper introduces BasicBlocker, a generic ISA modification that works for all common ISAs and that allows non-speculative CPUs to obtain most of the performance benefit that would have been provided by speculative execution. To demonstrate the feasibility of BasicBlocker, this paper defines a variant of the RISC-V ISA called BBRISC-V and provides a thorough evaluation on both a 5-stage in-order soft core and a superscalar out-of-order processor using an associated compiler and a variety of benchmark programs.
description: Preprint
Spin-flavor structure of chiral-odd GPDs in the large-N_c limit
Creators: name: Schweitzer, P.
name: Weiss, C.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the spin-flavor structure of the nucleon's chiral-odd generalized parton distributions (transversity GPDs) in the large-N_c limit of QCD. In contrast to the chiral-even case, only three combinations of the four chiral-odd GPDs are non-zero in the leading order of the 1/N_c expansion: E_T-bar = E_T + 2 H_T-tilde, H_T and E_T-tilde. The degeneracy is explained by the absence of spin-orbit interactions correlating the transverse momentum transfer with the transverse quark spin. It can also be deduced from the natural N_c-scaling of the quark-nucleon helicity amplitudes associated with the GPDs. In the GPD E_T-bar the flavor-singlet component u + d is leading in the 1/N_c expansion, while in H_T and E_T-tilde it is the flavor-nonsinglet components u - d. The large-N_c relations are consistent with the spin-flavor structure extracted from hard exclusive pi0 and eta electroproduction data, if it is assumed that the processes are mediated by twist-3 amplitudes involving the chiral-odd GPDs and the chiral-odd pseudoscalar meson distribution amplitudes.
description: 13 pages, 1 figure
Artin groups of types $F_4$ and $H_4$ are not commensurable with that of type $D_4$
Creators: name: Soroko, Ignat
Publisher: name: arXiv
Year: 2020
Subjects: subject: Group Theory (math.GR)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 20F36, 20F65, 57M07, 57K20 (Primary) 20E36, 20E45 (Secondary)

description: In a recent article, Cumplido and Paris studied the question of commensurability between Artin groups of spherical type. Their analysis left six cases undecided, for the following pairs of Artin groups: $(F_4,D_4)$, $(H_4,D_4)$, $(F_4,H_4)$, $(E_6,D_6)$, $(E_7,D_7)$, and $(E_8,D_8)$. In this note we resolve the first two of these cases, namely, we show that the Artin groups of types $F_4$ and $H_4$ are not commensurable with that of type $D_4$. As a key step, we realize the abstract commensurator of the Artin group of type $D_4$ as the extended mapping class group of the torus with three punctures. We also find the automorphism group of the Artin group of type $D_4$ and obtain a description of torsion elements, their orders and conjugacy classes in all irreducible Artin groups of spherical type modulo their centers.
description: v4: a shortened version for the journal publication, to appear in "Topology and its Applications", 15 pages, 5 figures
Intrinsic Tetrahedron Formation of Reduced Attitude
Creators: name: Zhang, Silun
name: Song, Wenjun
name: He, Fenghua
name: Hong, Yiguang
name: Hu, Xiaoming
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: In this paper, formation control for reduced attitude is studied, in which both stationary and rotating regular tetrahedron formation can be achieved and are asymptotically stable under a large family of gain functions in the control. Moreover, by further restriction on the control gain, almost global stability of the stationary formation is obtained. In addition, the control proposed is an intrinsic protocol that only uses relative information and does not need to contain any information of the desired formation beforehand. The constructed formation pattern is totally attributed to the geometric properties of the space and the designed inter-agent connection topology. Besides, a novel coordinates transformation is proposed to represent the relative reduced attitudes in S^2, which is shown to be an efficient approach to reduced attitude formation problems.
The Nexuses between Tax Revenue, Inflation, Private Final Consumption And Economic Growth In Ethiopia
Creators: name: Handamo, Firehiywot
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2016

description: The study aims at understanding the nexus between tax revenue, private final consumption, inflation and economic growth in Ethiopia. To achieve this objective co-integrated VAR approach was employed. The estimated models enable to understand the long run and short run relationship of the variables for the period 1970–2015 in Ethiopia. The study have the following major findings: First, Real GDP exert negative and significant effect on real tax revenue in the long run while the impact of the real private final consumption is positive and insignificant in the long run. Second, there is a strong evidence that inflation exert negative impact on real tax revenue. Third, there is evidence of bi-directional causality between real tax revenue, inflation, real private final consumption and real GDP. Fifth, the impulse response function indicates that the variables are at fast movement towards long run time path. The overall findings of the study underlined given the long run negative impact of RGDP on real tax revenue, it will be natural to think of different reforms. Here, Inferences drawn will have implications for all stakeholders in the economy and are particularly useful for fiscal policy makers of the country.
Editorial: Eine Bestandsaufnahme technikdidaktischer Forschung im deutschsprachigen Raum
Creators: name: Pittich, Daniel
Publisher: name: Journal of Technical Education (JOTED)
Year: 2016

description: Eine Bestandsaufnahme technikdidaktischer Forschung im deutschsprachigen Raum
description: Journal of Technical Education (JOTED), Bd. 4 Nr. 2 (2016): Journal of Technical Education (JOTED)
HOMFLYPT homology for links in handlebodies via type A Soergel bimodules
Creators: name: Rose, David E. V.
name: Tubbenhauer, Daniel
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Algebra (math.QA)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: We define a triply-graded invariant of links in a genus g handlebody, generalizing the colored HOMFLYPT (co)homology of links in the 3-ball. Our main tools are the description of these links in terms of a subgroup of the classical braid group, and a family of categorical actions built from complexes of (singular) Soergel bimodules.
description: 25 pages, lots of figures, comments welcome
Second main theorem for meromorphic mappings with moving hypersurfaces in subgeneral position
Creators: name: Quang, Si Duc
Publisher: name: arXiv
Year: 2016
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 32H30, 30D35, 32A22

description: Let $f$ be an algebraically nondegenerate meromorphic mapping from $\mathbb C^m$ into $\mathbb P^n(\mathbb C)$ and let $Q_1,...,Q_q$ be $q$ hypersurfaces in $\mathbb P^n(\mathbb C)$ of degree $d_i$, in $N-$subgeneral position. In this paper, we will prove that, for every $ε>0$, there exists a positive integer $M$ such that $$||\ (q-(N-n+1)(n+1)-ε) T_f(r)\le\sum_{i=1}^q\frac{1}{d_i}N^{[M]}(r,f^*Q_i)+o(T_f(r)).$$ Moreover, an explicit estimate for $M$ is given. Our result is an extension of the previous second main theorem for the mappings and moving hyperplanes or moving hypersurfaces.
description: 21 pages. arXiv admin note: text overlap with arXiv:1610.03951
Location of the Adsorption Transition for Lattice Polymers
Creators: name: Madras, Neal
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mathematical Physics (math-ph)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 82B41, 60K35

description: We consider various lattice models of polymers: lattice trees, lattice animals, and self-avoiding walks. The polymer interacts with a surface (hyperplane), receiving a unit energy reward for each site in the surface. There is an adsorption transition of the polymer at a critical value of $β$, the inverse temperature. We present a new proof of the result of Hammersley, Torrie, and Whittington (1982) that the transition occurs at a strictly positive value of $β$ when the surface is impenetrable, i.e. when the polymer is restricted to a half-space. In contrast, for a penetrable surface, it is an open problem to prove that the transition occurs at $β=0$ (i.e., infinite temperature). We reduce this problem to showing that the fraction of N-site polymers whose span is less than $N/\log^2 N$ is not too small.
description: 15 pages
Protected generation of dissipative Kerr solitons in supermodes of coupled optical microresonators
Creators: name: Tikan, Alexey
name: Tusnin, Aleksandr
name: Riemensberger, Johann
name: Churaev, Mikhail
name: Komagata, Kenichi
name: Ji, Xinru
name: Wang, Rui Ning
name: Liu, Junqiu
name: Kippenberg, Tobias J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: The driven-dissipative photonic dimer comprised of two evanescently coupled high-Q microresonators is a fundamental element of multimode soliton lattices. It has demonstrated a variety of emergent nonlinear phenomena including supermode soliton generation, symmetry breaking, and soliton hopping. In this article, we present another aspect of dissipative soliton generation in coupled resonators, revealing the advantages of this system over conventional single resonator platforms. Namely, we show that the accessibility of solitons drastically varies for symmetric and antisymmetric supermode families of the dimer. Linear measurements reveal that the coupling between transverse modes, which gives rise to avoided mode crossings, can be almost completely suppressed. We explain the origin of this phenomenon and show its crucial influence on the dissipative Kerr soliton formation process in lattices of coupled high-Q resonators of any type. Choosing a particular example of the topological Su-Schrieffer-Heeger model, we demonstrate how the edge state can be protected from the interaction with higher-order modes, allowing for the formation of topological Kerr solitons.
The Financial Determinants of Private Sector Investment: The Case of Ethiopia
Creators: name: Teklay, Brhane
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2016

description: This study mainly emphasized on the financial determinants of private sector investment in Ethiopia using annual time series data from1975-2015. Using Johansen co integration test they have a significant relationship among variables and OLS regression analysis was undertake to estimate long run model and ECM has been used to find out the short run dynamics. In both long run and short run model the financial determinants variable like broad money supply, bank credit and availability of foreign exchange were positive relation with the private investment. The other macro variable taken was the capital expenditure, which is negatively affect in the long run and positively affect private investment in the short run. The researchers conclude based on past literature result's capital expenditure is positively association with private investment. The short run dynamics of estimated coefficient ECM which suggests a relatively quick speed of adjustment back to the long-run equilibrium. The findings of the study provide evidence that private investment in Ethiopia, like in other developing countries is affected by important financial and macroeconomic variables. The empirical evidence however has certain important policy implications, and in view of that recommendations have also been provided, in an attempt to help increase and stimulate private investment in Ethiopia. Key words: Ethiopia, private investment, financially determinants, Johannes co-integration.
Absorbing Boundary Condition as Limiting Case of Imaginary Potentials
Creators: name: Tumulka, Roderich
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Imaginary potentials such as $V(x)=-iv 1_Ω(x)$ (with $v>0$ a constant, $Ω$ a subset of 3-space, and $1_Ω$ its characteristic function) have been used in quantum mechanics as models of a detector. They represent the effect of a "soft" detector that takes a while to notice a particle in the detector volume $Ω$. In order to model a "hard" detector (i.e., one that registers a particle as soon as it enters $Ω$), one may think of taking the limit $v\to\infty$ of increasing detector strength $v$. However, as pointed out by Allcock, in this limit the particle never enters $Ω$; its wave function gets reflected at the boundary $\partial Ω$ of $Ω$ in the same way as by a Dirichlet boundary condition on $\partial Ω$. This phenomenon, a cousin of the "quantum Zeno effect," might suggest that a hard detector is mathematically impossible. Nevertheless, a mathematical description of a hard detector has recently been put forward in the form of the "absorbing boundary rule" involving an absorbing boundary condition on the detecting surface $\partial Ω$. We show here that in a suitable (non-obvious) limit, the imaginary potential $V$ yields a non-trivial distribution of detection time and place in agreement with the absorbing boundary rule. That is, a hard detector can be obtained as a limit, but it is a different limit than Allcock considered.
description: 12 pages LaTeX, no figures
On the roots of the node reliability polynomial
Creators: name: Brown, Jason
name: Mol, Lucas
Publisher: name: arXiv
Year: 2016
Subjects: subject: Combinatorics (math.CO)
subject: Classical Analysis and ODEs (math.CA)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 05E99, 94C15

description: Given a graph $G$ whose edges are perfectly reliable and whose nodes each operate independently with probability $p\in[0,1],$ the node reliability of $G$ is the probability that at least one node is operational and that the operational nodes can all communicate in the subgraph that they induce; it is the analogous node measure of robustness to the well studied \textit{all-terminal reliability}, where the nodes are perfectly reliable but the edges fail randomly. In sharp contrast to what is known about the roots of the all-terminal reliability polynomial, we show that the node reliability polynomial of any connected graph on at least three nodes has a nonreal polynomial root, the collection of real roots of all node reliability polynomials is unbounded, and the collection of complex roots of all node reliability polynomials is dense in the entire complex plane.
description: 3 figures
The Effect of Remittances on Household Expenditures and Labor Supply in Ethiopia: Evidence from Ethiopian Rural Household Survey.
Creators: name: Ejeta, Genet
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2014

description: The study examined the impacts of remittances on household expenditures and labor supply in rural households in Ethiopia. Specifically, the paper investigates the extents to which receipts of remittances affect the consumption and investment behaviors of rural households. The study employs two-part model (Hurdle model analyses in order to estimate the impact of household expenditure within Engle"s Curve framework .The result indicates that there is no strong link between receipt of remittances and productive investment expenditures. The study finds that households receiving remittances spend, on average ceteris paribus, a larger share of their budget on consumption of food and a smaller share on than do households receiving no remittances. This implies that migration and remittances are used as a short term coping strategies and hardly used as stepping-stone to productive investment options. Therefore, designing policies that increase the inflow and usage of remittances are vital. Policies include: improving the operation and service of financial institutions, providing incentives and training for remittance recipients to be designed. This paper also examines the impact that remittances has on the remittance-receiving households" labor supply decisions, specifically examining how they affect off-farm work effect of using panel data. The study aims to investigate how the received remittances are affecting the recipient household"s labor supply by applying the neoclassical model of labor-leisure choice, and by analyzing data on ERHS. The finding from Tobit model shows that remittances affect labor supply negatively for both men and women (especially women) and these results thereby contribute to the understanding of how this aspect of migration affects the households and source countries" economy. Key Words and Phrases: Remittances, labor supply, Household expenditures and investment, Rural households, Panel data.
Hydrogenation of naphthalene and of creosote oil in a continuous stirred tank reactor
Creators: name: White, R. T. .
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Quantum simulations of molecular systems with intrinsic atomic orbitals
Creators: name: Barison, Stefano
name: Galli, Davide Emilio
name: Motta, Mario
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum simulations of molecular systems on quantum computers often employ minimal basis sets of Gaussian orbitals. In comparison with more realistic basis sets, quantum simulations employing minimal basis sets require fewer qubits and quantum gates, but yield results of lower accuracy. A natural strategy to achieve more accurate results is to increase the basis set size, which in turn requires increasing the number of qubits and quantum gates. Here we explore the use of intrinsic atomic orbitals (IAOs) in quantum simulations of molecules, to improve the accuracy of energies and properties at the same computational cost required by a minimal basis. We investigate ground-state energies and one- and two-body density operators in the framework of the variational quantum eigensolver, employing and comparing different Ansätze. We also demonstrate the use of this approach in the calculation of ground- and excited-states energies of small molecules by a combination of quantum algorithms, using IBM Quantum computers.
description: 14 pages, 14 figures. Published in Physical Review A
Inflation and Economic Growth: An Estimating of Threshold Level of Inflation in Ethiopia
Creators: name: Feyisa, Admasu
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2014

description: One of the prime objectives of macroeconomic policy both in developed and developing countries are to achieve economic stability and obtain sustainable economic growth simultaneously with price stability. This study, therefore, seeks to estimate the optimal level of inflation using quarterly time-series data for the period 1991 – 2013, which is conducive for economic growth in Ethiopia by following the Khan and Senhadji (2001) methodology. Based on the approach adopted, it is found some evidence that inflation has a threshold effect on economic growth. Estimated threshold model indicate that there is non-linear relationship between economic growth and inflation in the Ethiopian economy and the threshold level of inflation for GDP growth is 10 percent. As an inflation targeting country, this is a crucial finding as it provides a baseline study in search of the optimal level of inflation for growth. These findings are essential for monetary policy formulation by the National Bank of Ethiopia, whose primary objective is the achievement and maintenance of price stability, as it provides a guide for the Bank to choose an optimal inflation rate, which is consistent with long-term sustainable economic growth goals of the country