cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
STUDYING THE FLEXURAL PROPERTIES AND MAX.SHEAR STRESS OF SELF CURE PMMA RESIN FOR DENTURE APPLICATIONS
Creators: name: Oleiwi, Jawad K.
Publisher: name: figshare
Year: 2020
Subjects: subject: 90301 Biomaterials
subject: FOS: Medical engineering
subject: 110501 Dental Materials and Equipment
subject: FOS: Clinical medicine
subject: 91202 Composite and Hybrid Materials
subject: FOS: Materials engineering
subject: 91299 Materials Engineering not elsewhere classified

description: Poly Methyl Methacrylate were widely accepted material in dental and medical field due to the excellent biocompatibility and easy fabrication, however exhibit inferior mechanical properties. Therefore, the present study conducted to determine the flexural properties of PMMA based material by reinforcing PMMA with two different natural fibers (bamboo & siwak fibers). Discontinuous random fibers used in three lengths (2, 6 & 12 mm) and three weight percentage (3, 6 & 9 wt. %) of the both types of fibers. Results indicated that Flexural modulus, flexural strength and max.shear stress increase with increasing weight fraction and fiber length of fibers (bamboo & siwak) and reach the maximum amount at addition of weight fraction of (9 wt.%) and (12mm) length of fibers. The highest value of flexural modulus, flexural strength and max.shear stress were (10.09GPa), (112MPa), (6MPa) respectively, for composite specimens with bamboo fibers, while for composite specimen with siwak fibers (9.71GPa),(101MPa),(4.44MPa) at the optimum condition of (9wt.%) and (12mm) length . All composite specimens reinforced with bamboo fibers showed the highest flexural strength and flexural modulus among the composite specimen reinforced by siwak fibers.
KH15D: a star eclipsed by a large scale dusty vortex?
Creators: name: Barge, P.
name: Viton, M.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We propose that the large photometric variations of KH15D are due to an eclipsing swarm of solid particles trapped in giant gaseous vortex rotating at \~0.2 AU from the star. The efficiency of the capture-in-vortex mechanism easily explains the observed large optical depth. The weaker opacity at mid-eclipse is consistent with a size segregation of the particles toward the center of the vortex. This dusty structure must extend over ~1/3 of an orbit to account for the long eclipse duration. The estimated size of the trapped particles is found to range from 1 to 10cm, consistent with the gray extinction of the star. The observations of KH15D support the idea that giant vortices can grow in circumstellar disks and play a central role in planet formation.
description: Accepted in ApJ Letters - 4 pages - 2 figures
MERITS OF PRINCIPAL ARGUMENTS ON UNDERGRADUATE STUDENT VOTING MEMBERSHIP ON THE GOVERNING BOARD OF COLLEGES AND UNIVERSITIES
Creators: name: Wright, William Charles
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 39
subject: Education
classificationCode: 3903
subject: Education systems

description: Source: Dissertation Abstracts International, Volume: 38-03, Section: A, page: 1264.
Study Compression and Impact Properties of PMMA Reinforced by Natural Fibers Used in Denture
Creators: name: Oleiwi, Jawad K.
Publisher: name: figshare
Year: 2020
Subjects: subject: 90301 Biomaterials
subject: FOS: Medical engineering
subject: 110501 Dental Materials and Equipment
subject: FOS: Clinical medicine
subject: 91202 Composite and Hybrid Materials
subject: FOS: Materials engineering
subject: 91299 Materials Engineering not elsewhere classified

description: The fracture in dentures prepared from acrylic resin occurs frequently during the accidental damage or service through heavy occlusal force [1]. Impact failures usually occur out of the mouth as a result of accidental dropping due to cleaning, coughing or sneezing or a sudden blow to the denture [2]. This paper is focused on the effect of natural fibers on the mechanical properties of PMMA by changing two parameters (content of fibers and length of fibers). Fibers were treated with alkaline solution to improve the interfacial adhesion. Composite specimens were prepared by using hand lay-up method. The results were showed that the increasing the weight fraction of both fibers lead to increase compression strength and decrease impact strength of composite specimens. While, increasing fiber length of both fibers lead to decrease compression strength and increase impact strength of the composite specimens. The largest value obtained for bamboo specimens at (2mm) fiber length and (9wt. %) and reach (530 MPa.). The main goal of this research is studying the impact and compression properties of PMMA reinforced by natural fibers (siwak and bamboo) by varying length and concentration of both kinds of fibers.
Elastic Inflation
Creators: name: Gruzinov, Andrei
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Inflation of a universe filled by an elastic continuous medium is considered. Elastic inflation, while capable of describing current observations, is qualitatively different from standard inflationary models. The scalar and tensor modes keep evolving after crossing the horizon. Due to this superhorizon evolution, the amplitude of the tensor mode (inflationary gravitational wave) is not simply proportional to the energy density of the universe at the time of horizon crossing. The spectral index of tensor modes can be positive.
description: 12 pages
Hydrodynamic attractors in phase space
Creators: name: Heller, Michal P.
name: Jefferson, Ro
name: Spaliński, Michał
name: Svensson, Viktor
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Hydrodynamic attractors have recently gained prominence in the context of early stages of ultra-relativistic heavy-ion collisions at the RHIC and LHC. We critically examine the existing ideas on this subject from a phase space point of view. In this picture the hydrodynamic attractor can be seen as a special case of the more general phenomenon of dynamical dimensionality reduction of phase space regions. We quantify this using Principal Component Analysis. Furthermore, we adapt the well known slow-roll approximation to this setting. These techniques generalize easily to higher dimensional phase spaces, which we illustrate by a preliminary analysis of a dataset describing the evolution of a 5-dimensional manifold of initial conditions immersed in a 16-dimensional representation of the phase space of the Boltzmann kinetic equation in the relaxation time approximation.
description: 9 pages, 5 figures. Matches published version and includes new supplemental material on dimensionality reduction in kinetic theory
SOCIAL INTERACTION AMONG MALTREATED PRESCHOOLERS IN A THERAPEUTIC EDUCATIONAL SETTING
Creators: name: Wusterbarth, Niles J.
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 39
subject: Education
classificationCode: 3904
subject: Specialist studies in education

description: Source: Dissertation Abstracts International, Volume: 38-03, Section: A, page: 1336.
Explanations of the inconsistencies in survey respondents' forecasts
Creators: name: Clements, Michael P.
name: Clements, Michael P.
Publisher: name: Unknown
Year: 2008
Subjects: subject: Agricultural and Food Policy
subject: Research Methods/ Statistical Methods
subject: Rationality
subject: point forecasts
subject: probability distributions

description: A comparison of the point forecasts and the central tendencies of probability distributions of ináation and output growth of the SPF indicates that the point forecasts are sometimes optimistic relative to the probability distributions. We consider and evaluate a number of possible explanations for this Önding, including the degree of uncertainty concerning the future, computational costs, delayed updating, and asymmetric loss. We also consider the relative accuracy of the two sets of forecasts.
Drawings of the Cicada, the Seventeen Year Locust
Creators: name: Black, G. V. (Greene Vardiman), 1836-1915.
Publisher: name: DigitalHub. Galter Health Sciences Library & Learning Center
Year: 1876
Subjects: subject: Periodical cicada
subject: Hemiptera
subject: Microscopical Society (Jacksonville, Ill.)
subject: Hemiptera
subject: Periodical cicada

description: Pencil drawings presented to the Jacksonville, Illinois Microscopical Society
Driving a magnetized domain wall in an antiferromagnet by magnons
Creators: name: Shen, Pengtao
name: Tserkovnyak, Yaroslav
name: Kim, Se Kwon
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We theoretically study the interaction of magnons, quanta of spin waves, and a domain wall in a one-dimensional easy-axis antiferromagnet in the presence of an external magnetic field applied along the easy axis. To this end, we begin by obtaining the exact solution for spin waves in the background of a domain wall magnetized by an external field. The finite magnetization inside the domain wall is shown to give rise to reflection of magnons scattering off the domain wall, deviating from the well-known result of reflection-free magnons in the absence of a magnetic field. For practical applications of the predicted reflection of magnons, we show that the magnon reflection contributes to the thermally-driven domain-wall motion. Our work leads us to envision that inducing a finite magnetization in antiferromagnetic solitons such as vortices and skyrmions can be used to engender phenomena that do not occur in the absence of magnetization.
description: 9 pages, 3 figures
CONTRASTING SOCIAL THEORIES OF UTOPIA: AN ANALYSIS OF "LOOKING BACKWARD" AND "WALDEN TWO."
Creators: name: Ziemba, Margaret Mary
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 47
subject: Language, communication and culture
classificationCode: 4705
subject: Literary studies

description: Source: Dissertation Abstracts International, Volume: 38-03, Section: A, page: 1399.
Large-N Collective Fields and Holography
Creators: name: Das, Sumit R.
name: Jevicki, Antal
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We propose that the euclidean bilocal collective field theory of critical large-N vector models provides a complete definition of the proposed dual theory of higher spin fields in anti de-Sitter spaces. We show how this bilocal field can be decomposed into an infinite number of even spin fields in one more dimension. The collective field has a nontrivial classical solution which leads to a O(N) thermodynamic entropy characteristic of the lower dimensional theory, as required by general considerations of holography. A subtle cancellation of the entropy coming from the bulk fields in one higher dimension with O(1) contributions from the classical solution ensures that the subleading terms in thermodynamic quantities are of the expected form. While the spin components of the collective field transform properly under dilatational, translational and rotational isometries of $AdS$, special conformal transformations mix fields of different spins indicating a need for a nonlocal map between the two sets of fields. We discuss the nature of the propagating degrees of freedom through a hamiltonian form of collective field theory and argue that nonsinglet states which are present in an euclidean version are related to nontrivial backgrounds.
description: 27 pages, harvmac. v2: references added
Black or White? How to Develop an AutoTuner for Memory-based Analytics [Extended Version]
Creators: name: Kunjir, Mayuresh
name: Babu, Shivnath
Publisher: name: arXiv
Year: 2020
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Databases (cs.DB)
subject: FOS: Computer and information sciences
subject: H.2.4

description: There is a lot of interest today in building autonomous (or, self-driving) data processing systems. An emerging school of thought is to leverage AI-driven "black box" algorithms for this purpose. In this paper, we present a contrarian view. We study the problem of autotuning the memory allocation for applications running on modern distributed data processing systems. For this problem, we show that an empirically-driven "white-box" algorithm, called RelM, that we have developed provides a close-to-optimal tuning at a fraction of the overheads compared to state-of-the-art AI-driven "black box" algorithms, namely, Bayesian Optimization (BO) and Deep Distributed Policy Gradient (DDPG). The main reason for RelM's superior performance is that the memory management in modern memory-based data analytics systems is an interplay of algorithms at multiple levels: (i) at the resource-management level across various containers allocated by resource managers like Kubernetes and YARN, (ii) at the container level among the OS, pods, and processes such as the Java Virtual Machine (JVM), (iii) at the application level for caching, aggregation, data shuffles, and application data structures, and (iv) at the JVM level across various pools such as the Young and Old Generation. RelM understands these interactions and uses them in building an analytical solution to autotune the memory management knobs. In another contribution, called GBO, we use the RelM's analytical models to speed up Bayesian Optimization. Through an evaluation based on Apache Spark, we showcase that RelM's recommendations are significantly better than what commonly-used Spark deployments provide, and are close to the ones obtained by brute-force exploration; while GBO provides optimality guarantees for a higher, but still significantly lower compared to the state-of-the-art AI-driven policies, cost overhead.
description: Main version in ACM SIGMOD 2020
EXPERIMENTAL INVESTIGATION OF FLEXURAL AND IMPACT PROPERTIES OF PMMA REINFORCED BY BAMBOO AND RICE HUSK POWDERS
Creators: name: Oleiwi, Jawad K.
Publisher: name: figshare
Year: 2020
Subjects: subject: 90301 Biomaterials
subject: FOS: Medical engineering
subject: 110501 Dental Materials and Equipment
subject: FOS: Clinical medicine
subject: 91202 Composite and Hybrid Materials
subject: FOS: Materials engineering
subject: 91299 Materials Engineering not elsewhere classified

description: In this research, studying the influence of insert two different types of reinforcing particles, which included: Rice Husk and Bamboo powders which were practical size (25 and 75 μm) and utilize at four various concentrations of (2, 4, 6, and 8 wt.%), to improve in the properties of flexural and impact for heat-cure acrylic resin. The composite specimens of resin and powders were cured at temperature 70-100 °C in a water bath and 2.5 bar for 2 hours. The results showed that the flexural and impact properties became better with low particle size and high concentration. The highest value of flexural strength was (114 Mpa.) for (PMMA- 8% Ba) composite specimens at particles size (25 μm). And the highest value of impact strength was (14.2 KJ/m²) for (PMMA-8%RH) composite specimen at particles size (25 μm).
Low-energy J/psi-Hadron Interactions from Quenched Lattice QCD
Creators: name: Yokokawa, K.
name: Sasaki, S.
name: Hayashigaki, A.
name: Hatsuda, T.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The J/psi-hadron interaction is a key ingredient in analyzing the J/psi suppression in hot hadronic matter as well as the propagation of J/psi in nuclei. As a first step to clarify the J/psi-hadron interactions at low energies, we have calculated J/psi-pi, J/psi-rho and J/psi-nucleon scattering lengths by the quenched lattice QCD simulations with Wilson fermions for beta=6.2 on 24^3*48 and 32^3*48 lattices. Using the Luscher's method to extract the scattering length from the simulations in a finite box, we find an attractive interaction in the S-wave channel for all three systems: Among others, the J/psi-nucleon interaction is most attractive. Possibility of the J/psi-nucleon bound state is also discussed.
description: 6 pages, 6 figures, talk presented at Lattice 2005 (Heavy quark physics), Trinity College, Dublin, Ireland, 25-30 July 2005
Dynamics and transport properties of Kondo insulators
Creators: name: Vidhyadhiraja, N. S.
name: Smith, Victoria E.
name: Logan, David E.
name: Krishnamurthy, H. R.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A many-body theory of paramagnetic Kondo insulators is described, focusing specifically on single-particle dynamics, scattering rates, d.c. transport and optical conductivities. This is achieved by development of a non-perturbative local moment approach to the symmetric periodic Anderson model within the framework of dynamical mean-field theory. Our natural focus is the strong coupling, Kondo lattice regime; in particular the resultant `universal' scaling behaviour in terms of the single, exponentially small low-energy scale characteristic of the problem. Dynamics/transport on all relevant ($ω, T$) scales are considered, from the gapped/activated behaviour characteristic of the low-temperature insulator through to explicit connection to single-impurity physics at high $ω$ and/or $T$; and for optical conductivities emphasis is given to the nature of the optical gap, the temperature scale responsible for its destruction, and the consequent clear distinction between indirect and direct gap scales. Using scaling, explicit comparison is also made to experimental results for d.c. transport and optical conductivites of Ce_3Bi_4Pt_3, SmB_6 and YbB_{12}. Good agreement is found, even quantitatively; and a mutually consistent picture of transport and optics results.
description: 49 pages, 23 figures
Was Germany ever united? Evidence from Intra- and International Trade 1885 – 1933
Creators: name: Wolf, Nikolaus
name: Wolf, Nikolaus
Publisher: name: Unknown
Year: 2008
Subjects: subject: International Relations/Trade
subject: Public Economics
subject: Germany
subject: Economic Integration
subject: Aggregation Bias
subject: Border Effects

description: When did Germany become economically integrated? Within the framework of a gravity model, based on a new data set of about 40,000 observations on trade flows within and across the borders of Germany over the period 1885 – 1933, I explore the geography of trade costs across Central Europe. There are three key results. First, the German Empire before 1914 was a poorly integrated economy, both relative to integration across the borders of the German state and in absolute terms. Second, this internal fragmentation resulted from cultural heterogeneity, from administrative borders within Germany, and from geographical barriers that divided Germany along natural trade routes into eastern and western parts. Third, internal integration improved, while external integration worsened after World War I and again with the Great Depression, in part because of border changes along the lines of ethno-linguistic heterogeneity. By the end of the Weimar Republic in 1933, Germany was reasonably well integrated.
Applications of correlation inequalities to low density graphical codes
Creators: name: Macris, Nicolas
Publisher: name: arXiv
Year: 2005
Subjects: subject: Information Theory (cs.IT)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: This contribution is based on the contents of a talk delivered at the Next-SigmaPhi conference held in Crete in August 2005. It is adressed to an audience of physicists with diverse horizons and does not assume any background in communications theory. Capacity approaching error correcting codes for channel communication known as Low Density Parity Check (LDPC) codes have attracted considerable attention from coding theorists in the last decade. Surprisingly strong connections with the theory of diluted spin glasses have been discovered. In this work we elucidate one new connection, namely that a class of correlation inequalities valid for gaussian spin glasses can be applied to the theoretical analysis of LDPC codes. This allows for a rigorous comparison between the so called (optimal) maximum a posteriori and the computationaly efficient belief propagation decoders. The main ideas of the proofs are explained and we refer to recent works for the more lengthy technical details.
description: 11 pages, 3 figures
Are Central Banks following a linear or nonlinear (augmented) Taylor rule?
Creators: name: Castro, Vitor
name: Castro, Vitor
Publisher: name: Unknown
Year: 2008
Subjects: subject: Financial Economics
subject: Research Methods/ Statistical Methods
subject: Taylor rule
subject: ECB monetary policy
subject: Financial Conditions Index
subject: Nonlinearity
subject: Smooth transition regression models

description: The Taylor rule establishes a simple linear relation between the interest rate, inflation and output gap. However, this relation may not be so simple. To get a deeper understanding of central banks’ behaviour, this paper asks whether central banks are indeed following a linear Taylor rule or, instead, a nonlinear rule. At the same time, it also analyses whether that rule can be augmented with a financial conditions index containing information from some asset prices and financial variables. A forwardlooking monetary policy reaction function is employed in the estimation of the linear and nonlinear models. A smooth transition model is used to estimate the nonlinear rule. The results indicate that the European Central Bank and the Bank of England tend to follow a nonlinear Taylor rule, but not the Federal Reserve of the United States. In particular, those two central banks tend to react to inflation only when inflation is above or outside their targets. Moreover, our evidence suggests that the European Central Bank is targeting financial conditions, contrary to the other two central banks. This lack of attention to the financial conditions might have made the United States and the United Kingdom more vulnerable to the recent credit crunch than the Eurozone.
Mimela dehaani
Creators: name: Prokofiev, Artem M.
name: Zorn, Carsten
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Rutelidae
Mimela
Mimela dehaani

description: Mimela dehaani (HOPE, 1839)
(Figs 5, 29–31)
 Material: 5, 4 “ VIETNAM, Lam Dong prov., Lac Duong distr., Bi Doup – Nui Ba Natl. Park, alt. 1500–1625 m, at light, 4.2010, 4–5.2012, A.M. Prokofiev leg.” (CAP).
 Type material: Euchlora dehaani Hope: Syntype: 1  “TYPE HOPE Proc. Zool. Soc. 2. 1839. P. 71 Coll. Hope Oxon. | Euchlora DeHaani Hope [Hope’s handwritten label] | DeHaani Hope [Hope’s handwritten label] | Mimela dehaani, Hope. teste,c 1910. G.J. Arrow. in Brit. Mus. | TYPE COL: 565 Euchlora dehaani Hope HOPE DEPT.OXFORD ” (UMO).
 Mimela decipiens Hope: Syntypes: 1  “TYPE HOPE Trans. Ent. Soc. 3. 1841 P. 66 Coll. Hope Oxon. | Mimela decipiens Hope [Hope’s handwritten label] | Mimela dehaani, Hope. teste,c 1910. G.J. Arrow. in Brit. Mus. | TYPE COL: 566 1/1 Mimela decipiens Hope HOPE DEPT.OXFORD ” (UMO). 1  “Decipiens [Hope’s handwritten label] | TYPE HOPE Trans. Ent. Soc. 3. 1841 P. 66 Coll. Hope Oxon. | Mimela dehaani, Hope. teste,c 1910. G.J. Arrow. in Brit. Mus. | TYPE COL: 566 2/2 Mimela decipiens Hope HOPE DEPT.OXFORD ” (UMO).
 Mimela dulcissima Bates: Syntype: 1  “SzeChuen China | Mimela dulcissima Bates | Ex-Musaeo H.W.BATES 1892 | SYNTYPE Mimela dulcissima Bates, 1891 det. Zorn, 2002” (MNHN).
 Remarks: Our specimens from Dalat Plateau do not differ from the type specimens of Euchlora dehaani HOPE, 1839, Mimela decipiens HOPE, 1841 and M. dulcissima BATES, 1891 (UMO, MNHN, examined) from Himalaya and Southwestern China, of which the conspecificity was proved earlier (ZORN, 2005).
description: Published as part of Prokofiev, Artem M. & Zorn, Carsten, 2016, Review of the Mimela species of the Dalat Plateau in southern Vietnam (Coleoptera, Scarabaeidae, Rutelinae), pp. 329-346 in Beiträge Zur Entomologie = Contributions to Entomology 66 (2) on page 333, DOI: 10.21248/contrib.entomol.66.2.329-346, http://zenodo.org/record/4754143
WATER ABSORPTION AND THERMAL PROPERTIES OF PMMA REINFORCED BY NATURAL FIBERS FOR DENTURE APPLICATIONS
Creators: name: Oleiwi, Jawad K.
Publisher: name: figshare
Year: 2020
Subjects: subject: 90301 Biomaterials
subject: FOS: Medical engineering
subject: 110501 Dental Materials and Equipment
subject: FOS: Clinical medicine
subject: 91202 Composite and Hybrid Materials
subject: FOS: Materials engineering
subject: 91299 Materials Engineering not elsewhere classified

description: The water absorption and thermal conductivity of denture base materials are important properties due to effecton dimensional stability and sensory of food during mastication. This paper discusses the effect of two natural fibers (siwak and bamboo) which used as reinforcement for properties (water absorption and thermal conductivity) of PMMA. The two kinds of fibers used in three different lengths (2, 6 and 12mm) and three concentrations (3, 6 and 9 wt. %). The results showed that the percent water absorption, thermal conductivity and thermal diffusivity increased with increase fiber length and weight fraction. The highest values of water absorption for bamboo specimens and siwak specimens (6.21 % and 7.21 % respectively) at (9wt.%) and (12mm) fiber length. The maximum values of thermal conductivity and thermal diffusivity for bamboo specimens (0.2216 W/m0K and 0.1628 mm2/sec), while for siwak specimens (0.2408 W/m0K and0.1747mm2/sec), respectively at optimum condition of (9wt. %) and (12mm) fiber length.
Digital Simulation of Topological Matter on Programmable Quantum Processors
Creators: name: Mei, Feng
name: Guo, Qihao
name: Yu, Ya-Fei
name: Xiao, Liantuan
name: Zhu, Shi-Liang
name: Jia, Suotang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Simulating the topological phases of matter in synthetic quantum simulators is a topic of considerable interest. Given the universality of digital quantum simulators, the prospect of digitally simulating exotic topological phases is greatly enhanced. However, it is still an open question how to realize digital quantum simulation of topological phases of matter. Here, using common single- and two-qubit elementary quantum gates, we propose and demonstrate an approach to design topologically protected quantum circuits on the current generation of noisy quantum processors where spin-orbital coupling and related topological matter can be digitally simulated. In particular, a low-depth topological quantum circuit is performed on both IBM and Rigetti quantum processors. In the experiments, we not only observe but also distinguish the 0 and $π$ energy topological edge states by measuring qubit excitation distribution at the output of the circuits.
description: 8 pages, 4 figures, Accepted by PRL
Study Thermal Behavior of Heat Cure Poly (Methyl Methacrylate) Reinforced by Bamboo and Rice Husk Powders for Denture Applications
Creators: name: Oleiwi, Jawad K.
Publisher: name: figshare
Year: 2020
Subjects: subject: 90301 Biomaterials
subject: FOS: Medical engineering
subject: 110501 Dental Materials and Equipment
subject: FOS: Clinical medicine
subject: 91202 Composite and Hybrid Materials
subject: FOS: Materials engineering
subject: 91299 Materials Engineering not elsewhere classified

description: The present research, studies the effect of adding two different types of reinforcing powders, which included: Bamboo (Ba) and Rice Husk (RH), that added with different weight fractions (2, 4, 6 and 8 wt. %), and with the selected size particles of (25μm and 75μm) on thermal behavior of heat Cure Poly (Methyl Methacrylate) such as thermal conductivity and thermal diffusivity in addition to the differential scanning calorimetry (DSC) analysis and these tests were accomplished at temperature of laboratory. The poly Methyl Methacrylate properties which reinforced by (Bamboo and Rice Husk) powders are mainly influenced by the interfacial adhesion strength between the powders and the matrix, and in order to get better correlation between the natural powder and PMMA matrix, so the powders were treated with alkali (sodium hydroxide NaoH) solution prior to use as reinforcement materials. The results showed that the values of the thermal conductivity and thermal diffusivity increased with increasing of the weight fraction for both particle sizes (25 μm and 75 μm) of natural powders.
Exact solutions for supersymmetric stationary black hole composites
Creators: name: Bates, Brandon
name: Denef, Frederik
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Four dimensional N=2 supergravity has regular, stationary, asymptotically flat BPS solutions with intrinsic angular momentum, describing bound states of separate extremal black holes with mutually nonlocal charges. Though the existence and some properties of these solutions were established some time ago, fully explicit analytic solutions were lacking thus far. In this note, we fill this gap. We show in general that explicit solutions can be constructed whenever an explicit formula is known in the theory at hand for the Bekenstein-Hawking entropy of a single black hole as a function of its charges, and illustrate this with some simple examples. We also give an example of moduli-dependent black hole entropy.
description: 13 pages, 1 figure
Message complexity of population protocols
Creators: name: Amir, Talley
name: Aspnes, James
name: Doty, David
name: Eftekhari, Mahsa
name: Severson, Eric
Publisher: name: arXiv
Year: 2020
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Computational Complexity (cs.CC)
subject: FOS: Computer and information sciences
subject: F.1.1

description: The standard population protocol model assumes that when two agents interact, each observes the entire state of the other agent. We initiate the study of $\textit{message complexity}$ for population protocols, where the state of an agent is divided into an externally-visible $\textit{message}$ and an internal component, where only the message can be observed by the other agent in an interaction. We consider the case of $O(1)$ message complexity. When time is unrestricted, we obtain an exact characterization of the stably computable predicates based on the number of internal states $s(n)$: If $s(n) = o(n)$ then the protocol computes semilinear predicates (unlike the original model, which can compute non-semilinear predicates with $s(n) = O(\log n)$), and otherwise it computes a predicate decidable by a nondeterministic $O(n \log s(n))$-space-bounded Turing machine. We then introduce novel $O(\mathrm{polylog}(n))$ expected time protocols for junta/leader election and general purpose broadcast correct with high probability, and approximate and exact population size counting correct with probability 1. Finally, we show that the main constraint on the power of bounded-message-size protocols is the size of the internal states: with unbounded internal states, any computable function can be computed with probability 1 in the limit by a protocol that uses only $\textit{1-bit}$ messages.
HOSTILITY AND RECONCILIATION: THE MOTHER IN ENGLISH CANADIAN FICTION
Creators: name: Irvine, Lorna Marie
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 47
subject: Language, communication and culture
classificationCode: 4705
subject: Literary studies

description: Source: Dissertation Abstracts International, Volume: 38-03, Section: A, page: 1380.
A STUDY OF INTERNAL STUDENT TRANSFERS FROM NATURAL SCIENCES IN SIX PREDOMINANTLY BLACK COLLEGES AND UNIVERSITIES
Creators: name: Brown, Rather G.
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 39
subject: Education
classificationCode: 3901
subject: Curriculum and pedagogy

description: Source: Dissertation Abstracts International, Volume: 38-03, Section: A, page: 1320.
Cash Breeds Success: The Role of Financing Constraints in Patent Races
Creators: name: Schroth, Enrique
name: Szalay, Dezso
name: Schroth, Enrique
name: Szalay, Dezso
Publisher: name: Unknown
Year: 2008
Subjects: subject: Financial Economics
subject: Research and Development/Tech Change/Emerging Technologies
subject: Patent Race
subject: optimal contract
subject: innovation
subject: financial constraints

description: This paper studies the impact of Önancing constraints on the equilibrium of a patent race. We develop a model where Örms Önance their R&D expenditures with an investor who cannot verify their e§ort. We solve for the optimal Önancial contract of any Örm along its best-response function. In equilibrium, any Örm in the race is more likely to win the more cash and assets it holds prior to the race, and the less cash and assets its rivals hold prior to the race. We use NBER evidence from pharmaceutical patents awarded between 1975 and 1999 in the US, patent citations, and COMPUSTAT to measure the effect of all the racing firms; cash holdings on the equilibrium winning probabilities. The empirical findings support our theoretical predictions.
STUDYING THE EFFECT OF NATURAL BAMBOO AND RICE HUSK POWDERS ON COMPRESSIVE STRENGTH and HARDNESS OF ACRYLIC RESIN
Creators: name: Oleiwi, Jawad K.
Publisher: name: figshare
Year: 2020
Subjects: subject: 90301 Biomaterials
subject: FOS: Medical engineering
subject: 110501 Dental Materials and Equipment
subject: FOS: Clinical medicine
subject: 91202 Composite and Hybrid Materials
subject: FOS: Materials engineering
subject: 91299 Materials Engineering not elsewhere classified

description: Denture base is the part of a denture that rests on the foundation tissues and to which teeth are Attached. Denture base may be complete or partial used for the alteration of missing natural teeth. The most popular material utilized for the fabrication of dentures base is the poly (methylmethacrylate) (PMMA) because is distinguished by many characteristic. The remarkable clarity of a methyl methacrylate resin, its relatively high strength and hardness, its color stability under all conditions of dental use, its insolubility in the mouth fluids, all of these properties combine to provide an excellent material for the prosthetics denture (S. S Carmen, 2010 and R. K. Alla 2013). This survey illustrate the effect of particle size of powders and weight fraction of natural Bamboo and Rice Husk powders on PMMA, with the selected size particles of (25μm and 75μm) and weight fraction (2, 4, 6 and 8wt. %), on compression strength and hardness, and these experiencewere accomplished at a temperature of laboratory. The results showed improved in the hardness and compression with concentration rate of Rice Husk and Bamboo powders in composite samples. Also, the highest values of compressive strength and hardness were (300MPa.) and (86) respectively for (PMMA-8%RH) and particle size (25 μm).
Quantum Fourier Transform Revisited
Creators: name: Camps, Daan
name: Van Beeumen, Roel
name: Yang, Chao
Publisher: name: arXiv
Year: 2020
Subjects: subject: Numerical Analysis (math.NA)
subject: Quantum Physics (quant-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: The fast Fourier transform (FFT) is one of the most successful numerical algorithms of the 20th century and has found numerous applications in many branches of computational science and engineering. The FFT algorithm can be derived from a particular matrix decomposition of the discrete Fourier transform (DFT) matrix. In this paper, we show that the quantum Fourier transform (QFT) can be derived by further decomposing the diagonal factors of the FFT matrix decomposition into products of matrices with Kronecker product structure. We analyze the implication of this Kronecker product structure on the discrete Fourier transform of rank-1 tensors on a classical computer. We also explain why such a structure can take advantage of an important quantum computer feature that enables the QFT algorithm to attain an exponential speedup on a quantum computer over the FFT algorithm on a classical computer. Further, the connection between the matrix decomposition of the DFT matrix and a quantum circuit is made. We also discuss a natural extension of a radix-2 QFT decomposition to a radix-d QFT decomposition. No prior knowledge of quantum computing is required to understand what is presented in this paper. Yet, we believe this paper may help readers to gain some rudimentary understanding of the nature of quantum computing from a matrix computation point of view.
TENSILE PROPERTIES AND MORPHOLOGICAL TEST OF HEAT CURED ACRYLIC RESIN REINFORCED BY NATURAL POWDERS
Creators: name: Oleiwi, Jawad K.
Publisher: name: figshare
Year: 2020
Subjects: subject: 90301 Biomaterials
subject: FOS: Medical engineering
subject: 110501 Dental Materials and Equipment
subject: FOS: Clinical medicine
subject: 91202 Composite and Hybrid Materials
subject: FOS: Materials engineering
subject: 91299 Materials Engineering not elsewhere classified

description: In the present research, studying the effect of adding two different types of reinforcing particles, which included: Rice Husk and Bamboo powders which were practical size (25 and 75 μm) and utilize at four various concentrations of (2,4,6, and 8 wt.%), to locate improved in the properties of tensile for heat-cure acrylic resin. The blend of resin and powders were cured at temperature 70-100 °C in a water bath and 2.5 bar for 2hours, The ASTM D638 is used for composite specimens of the tensile test. The results showed that the strength of tensile and Young's modulus became better with low particle size and high concentration. Also, the results showed that the largest values of tensile strength and modulus of elasticity were (96 MPa.) and (1.85 GPa.) respectively when reinforced by Rice Husk powder at particle size (25 μm) and concentration (8 wt. %).
TUGMACHAGUL (MALVA) TURKUMI O'SIMLIKLARINING BOTANIK TAVSIFI VA AMALIY AHAMIYATI
Creators: name: Muxtasar Muhammadjon Qizi Ergasheva
Publisher: name: Academic research in educational sciences
Year: 2021
Subjects: Tugmachagul (Malva)
aktinomorf
yong„oq meva
gulkosacha
ginetsey
turkum
Malva neglecta
Malva mauritana
Malva silvestris
Malva bucharica
kanop

description: Gulxayridoshlar oilasining vakilli hisoblangan tugmachagul turkumi vakillarini yer yuzining ko„pgina mintaqalarida uchratishimiz mumkin. Ularning barchasi o„zining morfologik tuzilishi va amaliy ahamiyatining turlicha ekanligi bilan farqlanadi. Tugmachagul turkumi sug„oriladigan va bahorikor yerlarda keng tarqalgan bo„lib, begona o„t sifatida o„sadi. Aprel sentyabr oylarida gullab meva beradi. Bu oila vakillari 5 qismli kosachasi va 5 ta barglari borliligi bilan ajralib turadi. O„zbekistonda uning Malva neglecta, M. mauritana, M. silvestris, M.bucharica singari turlari keng tarqalgan. Ushbu maqolada bu va boshqa mintaqalarda keng tarqalgan turkum vakillari keltirilgan
Non-local current correlations in ferromagnet/superconductor nanojunctions
Creators: name: Lambert, C. J.
name: Koltai, J.
name: Cserti, J.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: When two fully polarized ferromagnetic (F) wires with opposite polarizations make contact with a spin-singlet superconductor, a potential-induced current in wire 1 induces a non-local current of equal magnitude and sign in wire 2. The magnitude of this current has been studied in the tunneling limit and found to decay exponentially with the distance between the contact. In this paper we propose a new structure in which this novel non-local effect is increased by orders of magnitude. We study the spin-dependent electronic transport of a diffusive nanojunction and demonstrate that when a normal diffusive region is placed between the F leads and superconductor, the non-local initially increases with the separation between the F leads, achieving a maximum and decays as a power law with increasing separation.
description: Published in 'Towards The Controllable Quantum States (Mesoscopic Superconductivity and Spintronics)', 119-125, Eds H. Takayanagi and J. Nitta, World Scientific., (2003)
АВТОМОБИЛЬ ЙЎЛЛАРИНИНГ ЙЎЛ ПОЙИНИ ХИСОБИЙ НАМЛИГИНИ АНИҚЛАШ УСУЛЛАРИ
Creators: name: Сирожиддин Ахмеджанов
name: Фитрат Абдиҳалилов
name: Қуват Усмонов
Publisher: name: Academic research in educational sciences
Year: 2021
Subjects: йўл-иқлим зоналари
қумтош
глина
табиий намлиги
музлаш қалинлиги
сув баланси
сувнинг зичлиги
зичланиш даражаси

description: Ушбу мақолада Урганч шаҳар жойлашган ҳудудидан келиб чиқиб геологик ва гидрологик маълумотлар асосида автомобил йўли йўл пойининг хисобий намлигини аниқлаш масалалари баѐн қилинган
ХИТОЙ ТИЛИДА ИНВЕРСИЯ ҲОДИСАСИ ВА 把 “BǍ” ОЛД КЎМАКЧИСИ
Creators: name: Зиёда Зайнитдиновна Артикова
Publisher: name: Academic research in educational sciences
Year: 2021
Subjects: Инверсия
тўлдирувчи
грамматик восита
ёрдамчи сўз туркуми
把 “bǎ” олд кўмакчиси
сўзларнинг гапдаги тартиби
контекст

description: 把 “bǎ” ли гап хитой тилидаги кўп учрайдиган, тузилиши ўзига хос бўлган гаплардандир. Хитой тилида тўлдирувчининг икки хил жой ўзгартириш услуби бор. Биринчиси, ҳеч қандай грамматик воситаларсиз биринчи позицияни эгаллаш бўлса, иккинчиси эса, эга билан кесим орасидаги позицияни эгаллаш, яъни инверсия ҳодисаси содир бўлади, лекин бунинг учун ёрдамчи грамматик восита керак бўлади. Ёрдамчи грамматик восита вазифасини 把 “bǎ” олд кўмакчиси бажаради. Ишимизда кўриб чиқадиган масаламиз ҳам 把 “bǎ” олд кўмакчисининг ўзидан кейин турувчи тўлдирувчига нисбатан қўйиладиган талабларини очиб бериш
Tunable multiwindow magnomechanically induced transparency, Fano resonances, and slow-to-fast light conversion
Creators: name: Ullah, Kamran
name: Naseem, M. Tahir
name: Müstecaplıoglu, Özgür E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We investigate the absorption and transmission properties of a weak probe field under the influence of a strong control field in a hybrid cavity magnomechanical system in the microwave regime. This hybrid system consists of two ferromagnetic material yttrium iron garnet (YIG) spheres strongly coupled to a single cavity mode. In addition to two magnon-induced transparency (MIT) that arise due to strong photon-magnon interactions, we observe a magnomechanically induced transparency (MMIT) due to the presence of nonlinear phonon-magnon interaction. In addition, we discuss the emergence and tunability of the multiple Fano resonances in our system. We find that due to strong photon-magnon coupling the group delay of the probe field can be enhanced significantly. The subluminal or superluminal propagation depends on the frequency of the magnons, which can be easily tuned by an external bias magnetic field. Besides, the group delay of the transmitted field can also be controlled with the control field power.
description: 8 pages 9 figures
ТОШКЕНТ ИҚТИСОДИЙ РАЙОНИ ТРАНСПОРТ ГЕОГРАФИЯСИ
Creators: name: Равшан Йўлдошевич Маҳаммадалиев
Publisher: name: Academic research in educational sciences
Year: 2021
Subjects: ўтказувчанлик қуввати
логистика хизмати
юк ташиш
логистика
иқтисодий район
юк ташиш ҳажми
умумфойдаланиладиган йўллар
саноат тугуни
йўловчи ташиш

description: Мазкур мақолада Тошкент иқтисодий районида автомобил ва темир йўл транспортининг тарихи, ўрни ва аҳамияти, ҳозирги кундаги ҳолати таҳлил этилиш билан бир қаторда, иқтисодий районда транспорт тармоқларининг ривожланишига сабаб бўлган факторлар қайд этилган . Шунингдек иқтисодий райондаги мавжуд саноат шаҳарлари ва қишлоқ хўжалик туманларини ўзаро боғлаб турувчи автомобил йўллари тадрижий баѐн этилган. Айниқса, мақолада иқтисодий районнинг асосий шаҳри ҳисобланган Тошкент шаҳри мисолида автомобил, темир йўл ва ҳаво транспорти орқали боғланган маҳаллий(шаҳар атрофи ва шаҳарлар) ва хорижий шаҳарларга тўхталган.
Probing the Magnetic Field Structure in Gamma-Ray Bursts through Dispersive Plasma Effects on the Afterglow Polarization
Creators: name: Sagiv, Amir
name: Waxman, Eli
name: Loeb, Abraham
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: (Abr) The origin and structure of magnetic fields in Gamma-Ray Burst (GRB) fireball plasmas are two of the most important open questions in all GRB models. We show that the structure and strength of the magnetic field may be constrained by radio and IR observations of the early afterglow, where plasma effects on the polarization of propagating radiation are significant. We calculate these propagation effects for cold and relativistic plasmas, and find that in the presence of a uniform equipartition field the degree of linear polarization is suppressed, and circular polarization prevails at low frequencies, nu < 1-3 GHz, (2x10^11 Hz < nu < few x 10^14 Hz) in the forward (reverse) shock. At higher frequencies linear polarization dominates. At the frequency of the transition between circular and linear polarization, the net level of polarization is minimal, ~10-20%. These features are nearly independent of the circumburst density. The transition frequency is smaller by a factor of ~10 when the uniform field is much weaker than equipartition. The dependence of these results on viewing geometry, outflow collimation and magnetic field orientation is discussed. When the configuration of the field is entangled over length scales much smaller than the extent of the emitting plasma, the aforementioned effects should not be observed and a linear polarization at the few % level is expected. Polarimetric observations during the early afterglow, and particularly of the reverse shock emission, may therefore place strong constraints on the structure and strength of the magnetic field within the fireball plasma.
description: 12 pages, 6 figures. Accepted for publication in ApJ. Revised version includes improved discussion of viewing and fireball geometry, with implications to resulting polarization
The Smallest Eigenvalue Distribution of the Jacobi Unitary Ensembles
Creators: name: Lyu, Shulin
name: Chen, Yang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 15B52, 34E05, 41A60, 42C05

description: In the hard edge scaling limit of the Jacobi unitary ensemble generated by the weight $x^α(1-x)^β,~x\in[0,1],~α,β>0$, the probability that all eigenvalues of Hermitian matrices from this ensemble lie in the interval $[t,1]$ is given by the Fredholm determinant of the Bessel kernel. We derive the constant in the asymptotics of this Bessel-kernel determinant. A specialization of the results gives the constant in the asymptotics of the probability that the interval $(-a,a),a>0,$ is free of eigenvalues in the Jacobi unitary ensemble with the symmetric weight $(1-x^2)^β, x\in[-1,1]$.
description: 19 pages