cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Characterization of design parameters for a free foil rotor in a pressure screen
Creators: name: Gonzalez, Jaime Arturo
Publisher: name: University of British Columbia
Year: 2009

description: This thesis experimentally examined the pressure pulses produced by a NACA foil rotor. For this purpose, an experimental apparatus representing a cross section of a small industrial pulp pressure screen was used. The Cross Sectional Screen (CSS) was fitted with high frequency pressure sensors and an optical position encoder to record the pressure pulses created by the rotor on the inside of the screen basket and the effect of foil operation and design on the pulse shape and magnitude was determined. From this study, it was shown that: (1) the magnitude of pressure increases with the square of rotor tip speed, i.e., the dimensionless pressure coefficient was independent of rotor tip speed. (2) The magnitude of the pressure pulse increased exponentially as the clearance of the foil and the screen plate decreased. (3) The magnitude of the pressure pulse decreased with increasing pulp consistency. (4) The magnitude of the positive pressure peak increases with foil thickness; this is particularly important for thicknesses greater than 12%. The magnitude of the negative pressure peak and the shape of the pulse in general do not change significantly due to foil thickness. (5) For the foils tested (0%, 4% and 8% camber) the magnitude of the suction peak increased with increasing camber at zero angle of attack. (6) Angle of attack significantly changed the shape and magnitude of the pressure peak. In particular, it was noted that the maximum negative peak occurs at angles of attack between 5° and 15°, depending on the type of foil and experimental conditions. For positive angles of attack, the positive pressure peak seemed to be negligible. This suggests the optimal angle of attack for a NACA0012 foil is in the vicinity of 10°. In general, it was established that the Cross Sectional Screen modified to measure pressure pulses together with CNC machining of rotor foils provide a powerful tool for designing improved foils and assessing the resulting pressure pulses.
Formação Docente: Os graduandos das Licenciaturas e suas vivências e experimentações de estagiários na Escola de Aplicação da Universidade Federal do Pará
Creators: name: Ianca Miranda
Publisher: name: figshare
Year: 2020
Subjects: subject: 130313 Teacher Education and Professional Development of Educators
subject: FOS: Educational sciences

description: O artigo trata da relaçãoestabelecido entre estudantes de graduaçãocursos, seu processo de treinamento, suas interações,práticas e práticas como estagiários noEscola de Aplicação da Universidade Federal dePára. O objetivo é identificar a condição emquais esses alunos estão na escola, o quepossibilidades de construção do conhecimento edesenvolvimento de práticas pedagógicas e educacionaispráticas são fornecidas para a formação dessescomo professores e como eles acreditam que seusperíodo de estágio pode impactar seus profissionaispraticar após a sua formação. O trabalho usou ométodo quantitativo e qualitativo, queincluiu pesquisa bibliográfica e pesquisa de campoentre março e outubro de 2019, cujainstrumentos foram: aplicação de questionário,entrevistas e observações nas entrevistas dos alunosSala de aula. Alunos de graduação designados comoestagiários da Escola de Aplicação da FederalUniversidade do Pará. Os resultados indicam um bom usopela maioria dos estagiários e quanto àoportunidades que são possíveis durante oestágio, são vistos como positivos para odesenvolvimento de suas práticas de ensino. Elesidentificar que a Escola de Aplicação daUniversidade Federal do Pará tem dado atenção aestagiários e desenvolveu de forma organizadaforma sua gestão em seus espaços para que elespode desenvolver as habilidades e didáticas de ensino queeducação escolar exige, reafirmando acompromisso de auxiliar no treinamento deProfessores de educação.
Electrically tuned hyperfine spectrum in neutral Tb(II)(Cp$^{\rm{iPr5}}$)$_2$ single-molecule magnet
Creators: name: Smith, Robert L.
name: Wysocki, Aleksander L.
name: Park, Kyungwha
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Molecular spin qubits with long spin coherence time as well as non-invasive operation methods on such qubits are in high demand. It was shown that both molecular electronic and nuclear spin levels can be used as qubits. In solid state systems with dopants, an electric field was shown to effectively change the spacing between the nuclear spin qubit levels when the electron spin density is high at the nucleus of the dopant. Inspired by such solid-state systems, we propose that divalent lanthanide (Ln) complexes with an unusual electronic configuration of Ln$^{2+}$ have a strong interaction between the Ln nuclear spin and the electronic degrees of freedom, which renders electrical tuning of the interaction. As an example, we study electronic structure and hyperfine interaction of the $^{159}$Tb nucleus in a neutral Tb(II)(Cp$^{\rm{iPr5}}$)$_2$ single-molecule magnet (SMM) using the complete active space self-consistent field method with spin-orbit interaction included within the restricted active space state interaction. Our calculations show that the low-energy states arise from $4f^8(6s,5d_{z^2})^1$, 4$f^8$(5$d_{x^2-y^2}$)$^1$, and $4f^8(5d_{xy})^1$ configurations. We compute the hyperfine interaction parameters and the electronic-nuclear spectrum within our multiconfigurational approach. We find that the hyperfine interaction is about one order of magnitude greater than that for Tb(III)Pc$_2$ SMMs. This stems from the strong Fermi contact interaction between the Tb nuclear spin and the electron spin density at the nucleus that originates from the occupation of the $(6s,5d)$ orbitals. We also uncover that the response of the Fermi contact term to electric field results in electrical tuning of the electronic-nuclear level separations. This hyperfine Stark effect may be useful for applications of molecular nuclear spins for quantum computing.
description: 8 pages, 6 figures
Gauge invariant source terms in QCD
Creators: name: Fukushima, Kenji
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss how to implement the source terms in Quantum Chromodynamics (QCD) respecting gauge invariance and noncommutativity of color charge density operators. We start with decomposing the generating functional of QCD into constituents projected to have specified color charge density. We demonstrate that such a projection leads to the gauge invariant source terms consisting of a naive form accompanied by the density of states which cancels the gauge dependence. We then illustrate that this form is equivalently rewritten into a manifestly gauge invariant expression in terms of the Wilson line. We confirm that noncommutativity of color charge density operators is fulfilled in both representations of the source terms. We point out that our results are useful particularly to consider the problems of the quantum evolution in high energy QCD.
description: 10 pages, references added, more argument added in Sec.V
Acquiring the user’s opinion by using a generalized Context-aware Recommender System for real-world applications
Creators: name: Venkata Murali Krishna Chinta
Publisher: name: figshare
Year: 2020
Subjects: subject: 99999 Engineering not elsewhere classified
subject: FOS: Other engineering and technologies

description: This paper focusing about to extract user opinions in any application with in simple manner by using a Generalized Context-aware Recommnender System.
Unusual high-redshift radio BAL quasar 1624+3758
Creators: name: Benn, C. R.
name: Carballo, R.
name: Holt, J.
name: Vigotti, M.
name: Gonzalez-Serrano, J. I.
name: Mack, K. -H.
name: Perley, R. A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present observations of the most radio-luminous BAL quasar known, 1624+3758, at redshift z = 3.377. The quasar has several unusual properties: (1) The FeII UV191 1787-A emission line is very prominent. (2) The BAL trough (BALnicity index 2990 km/s) is detached by 21000 km/s and extends to velocity v = -29000 km/s. There are additional intrinsic absorbers at -1900 and -2800 km/s. (3) The radio rotation measure of the quasar, 18350 rad/m^2, is the second-highest known. The radio luminosity is P(1.4GHz) = 4.3 x 10^27 W/Hz (H0 = 50 km/s/Mpc, q0 = 0.5), radio loudness R* = 260. The radio source is compact (
description: 18 pages, 14 figures, accepted for publication in MNRAS
Arnol'd Tongues and Quantum Accelerator Modes
Creators: name: Guarneri, Italo
name: Rebuzzini, Laura
name: Fishman, Shmuel
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: The stable periodic orbits of an area-preserving map on the 2-torus, which is formally a variant of the Standard Map, have been shown to explain the quantum accelerator modes that were discovered in experiments with laser-cooled atoms. We show that their parametric dependence exhibits Arnol'd-like tongues and perform a perturbative analysis of such structures. We thus explain the arithmetical organisation of the accelerator modes and discuss experimental implications thereof.
description: 20 pages, 6 encapsulated postscript figures
Climate change mitigation potential in sanitation via off-site composting of human waste
Creators: name: McNicol, Gavin
name: Jeliazovski, Julie
name: Junior Jules-François
name: Kramer, Sasha
name: Ryals, Rebecca
Publisher: name: University of Illinois at Chicago
Year: 2021
Subjects: Environmental Science

description: Approximately 4.5 billion people lack access to safely managed sanitation globally, and 1 billion live in slums, often relying on anaerobic waste containment in pit latrines. Providing access to safely managed sanitation may lead to reduced GHG emissions and thus simultaneously address both Sustainable Development Goals. Here we measure cumulative GHG emissions of carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) during the off-site composting of human waste to estimate scalable emission factors. We find that CH4 emission factors are one to two orders of magnitude smaller than IPCC values for other excreta collection, treatment and disposal processes. After accounting for GHG emissions throughout the sanitation cycle, including transport, urine and compost end-use, the climate change mitigation potential is 126 kg of CO2-equivalent per capita per year for slum inhabitants. If scaled to global slum populations, composting could mitigate 3.97 Tg CH4 yr−1, representing 13-44% of sanitation sector CH4 emissions.
Imperfect Competition, Economies of Scale and Trade Liberalisation in Tunisia - A Comparative Analysis Using a Computable General Equilibrium Model (CGEM)
Creators: name: Ferjani, Ali
name: Ferjani, Ali
Publisher: name: Unknown
Year: 2003
Subjects: International Relations/Trade

description: Within a multi-sectoral general equilibrium framework, we explicitly model either competitive or Cournot oligopolistic commodities market structures. The model is used to assess the impact of trade liberalization on Tunisia economy. We show that the results are different from those obtained with perfect competition in terms of sectors allocations, but also mainly in terms of welfare. It is found that the trade liberalization improves welfare in all cases, and these gains are the most important with oligopoly. The existence of imperfection competition will be beneficial if the local producers profit from trade liberalization to decrease their production prices and to increase their production level. The outcome shows that the traditionally export-oriented sectors will cope with the liberalisation without any problems. In opposition the sectors that are usually more protected against foreign competition like the agricultural sector will suffer. The most unfortunate effects refer to public budget equilibrium. The fiscal reform proves to be an important element of every complementary domestic policy of the commercial liberalization.
First-principles calculation on the transport properties of molecular wires between Au clusters under equilibrium
Creators: name: Ning, Zhanyu
name: Chen, Jingzhe
name: Hou, Shimin
name: Zhang, Jiaxing
name: Liang, Zhenyu
name: Zhang, Jin
name: Han, Rushan
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Based on the matrix Green's function method combined with hybrid tight-binding / density functional theory, we calculate the conductances of a series of gold-dithiol molecule-gold junctions including benzenedithiol (BDT), benzenedimethanethiol (BDMT), hexanedithiol (HDT), octanedithiol (ODT) and decanedithiol (DDT). An atomically-contacted extended molecule model is used in our calculation. As an important procedure, we determine the position of the Fermi level by the energy reference according to the results from ultraviolet photoelectron spectroscopy (UPS) experiments. After considering the experimental uncertainty in UPS measurement, the calculated results of molecular conductances near the Fermi level qualitatively agree with the experimental values measured by Tao et. al. [{\it Science} 301, 1221 (2003); {\it J. Am. Chem. Soc.} 125, 16164 (2003); {\it Nano. Lett.} 4, 267 (2004).]
description: 12 pages,8 figures
The MVTec 3D-AD Dataset for Unsupervised 3D Anomaly Detection and Localization
Creators: name: Bergmann, Paul
name: Jin, Xin
name: Sattlegger, David
name: Steger, Carsten
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: We introduce the first comprehensive 3D dataset for the task of unsupervised anomaly detection and localization. It is inspired by real-world visual inspection scenarios in which a model has to detect various types of defects on manufactured products, even if it is trained only on anomaly-free data. There are defects that manifest themselves as anomalies in the geometric structure of an object. These cause significant deviations in a 3D representation of the data. We employed a high-resolution industrial 3D sensor to acquire depth scans of 10 different object categories. For all object categories, we present a training and validation set, each of which solely consists of scans of anomaly-free samples. The corresponding test sets contain samples showing various defects such as scratches, dents, holes, contaminations, or deformations. Precise ground-truth annotations are provided for every anomalous test sample. An initial benchmark of 3D anomaly detection methods on our dataset indicates a considerable room for improvement.
description: Accepted for presentation at VISAPP 2022
Model Independent Measurement of \swave $K^{-}π^{+}$ systems using $\Dp\to Kππ$ Decays from Fermilab E791
Creators: name: E791 Collaboration
name: Aitala, E.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A model-independent partial-wave analysis of the \swave component of the $Kπ$ system from decays of $D^{+}$ mesons to the three-body $\Km\pip\pip$ final state is described. Data come from the Fermilab E791 experiment. Amplitude measurements are made independently for ranges of $\Km\pip$ invariant mass, and results are obtained below 825 \MeVcc, where previous measurements exist only in two mass bins. This method of parametrizing a three-body decay amplitude represents a new approach to analysing such decays. Though no model is required for the \swave, a parametrization of the relatively well-known reference \pdash and \dwave s, optimized to describe the data used, is required. In this paper, a Breit-Wigner model is adopted to describe the resonances in these waves. The observed phase variation for the \sdash, \pdash and \dwave s do not match existing measurements of $I=\half$ $\Km\pip$ scattering in the invariant mass range in which scattering is predominantly elastic. If the data are mostly $I=\half$, this observation indicates that the Watson theorem, which requires these phases to have the same dependence on invariant mass, may not apply to these decays without allowing for some interaction with the other pion. The production rate of $\Km\pip$ from these decays, if assumed to be predominantly $I=\half$, is also found to have a significant dependence on invariant mass in the region above 1.25 \GeVcc. These measurements can provide a relatively model-free basis for future attempts to determine which strange scalar amplitudes contribute to the decays.
description: To be submitted to Phys. Rev. D. 21 pages, 9 figures, 4 tables
A INCLUSÃO COMO PROJETO DE EDUCAÇÃO E GARANTIA DE DIREITOS DA PESSOA COM DEFICIÊNCIA NAS SÉRIES INICIAIS DO ENSINO FUNDAMENTAL DAS ESCOLAS PÚBLICAS BRASILEIRAS
Creators: name: Ianca Miranda
Publisher: name: figshare
Year: 2020
Subjects: subject: 130312 Special Education and Disability
subject: FOS: Educational sciences

description: O artigo trata do direito a Educação da Pessoa Com Deficiência e da inclusão desses sujeitos no sistema público de ensino brasileiro. O objetivo é analisar quais ações são aplicadas pela escola para a inclusão desses sujeitos nos estabelecimentos públicos de ensino e como esse projeto de inclusão se desenvolve no contexto escolar, visando efetivar a garantia do direito à educação desses alunos. O trabalho utilizou o método qualiquantitativo e foi realizado com base em análise de dados de uma pesquisa de campo realizada por alunos do curso de Pedagogia da Universidade Federal do Pará no segundo semestre do ano de 2018 em escolas da rede pública da região urbana de Belém – PA, Brasil –, juntamente com uma pesquisa de revisão bibliográfica de autores que tratam do tema. Os resultados apontam dificuldades para a efetivação da inclusão e manutenção da Pessoa Com Deficiência nas escolas públicas de Belém, devido à desestrutura física dos espaços, à impossibilidade de ações administrativas e Pedagógicas coordenadas e à falta de continuidade na formação docente nessas escolas, em virtude da lacuna causada pela ausencia de políticas públicas e educacionais por parte do Estado brasileiro que visem a garantia do direito àeducação e inclusão desses sujeitos no sistema público de ensino.
Modeling of fiber motion in pulp and paper equipment
Creators: name: Dong, Suqin
Publisher: name: University of British Columbia
Year: 2009

description: This thesis describes a computational tool developed to simulate the fiber motion in pulp and paper equipment with particular emphasis on pulp screens. It is focused on modeling the fiber concentration upstream of a screen slot and examining the effects that different slot shapes have on the passage of fibers through the narrow apertures. This provides insight into the screen performance and has been used in this research to predict the characteristics of the screen. This simulation tool includes three coupled models: the flow model to predict the flow field in the equipment, the fiber model to trace the fiber trajectory in the equipment and the wall model to deal with the case when a fiber touches the equipment wall. The fluid field in the screen was examined using two numerical methods: the Reynolds Averaged Navier-Stokes (RANS) method for the calculation of flow through various slot shapes and Large Eddy Simulation (LES) for the fiber concentration calculation upstream of the screen slot. A three-dimensional flexible fiber model was employed to track the fiber trajectory in the screen. A very general wall model was developed to deal with the fiber-wall interaction. This wall model could be used for the case where a fiber touches a wall of any geometry, while specifying the wall geometry only through the fluid flow calculation routine. The simulated fiber concentration distribution increases linearly near the wall and becomes approximately constant farther from the wall, in reasonable agreement with experimental observations reported elsewhere. Slot shape has the most important influence on fiber passage ratio. For the same kind of fibers, same flow conditions and same overall slot width, a slope-slope slot provides the best passage for the fiber among all the slot shapes tested. For these contour slots, the contour height is also very critical, and a contour depth of 0.5mm seems best for both the step-step contour and slope-slope contour for fiber lengths of 1 to 3 mm. For the contour slots, the upstream side of contour plays no significant role in the fiber behavior; only the downstream side is important.
The theory of spectral evolution of the GRB prompt emission
Creators: name: Medvedev, Mikhail V.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We develop the theory of jitter radiation from GRB shocks containing small-scale magnetic fields and propagating at an angle with respect to the line of sight. We demonstrate that the spectra vary considerably: the low-energy photon index, $α$, ranges from 0 to -1 as the apparent viewing angle goes from 0 to $π/2$. Thus, we interpret the hard-to-soft evolution and the correlation of $α$ with the photon flux observed in GRBs as a combined effect of temporal variation of the viewing angle and relativistic aberration of an individual thin, instantaneously illuminated shell. The model predicts that about a quarter of time-resolved spectra should have hard spectra, violating the synchrotron $α=-2/3$ line of death. The model also naturally explains why the peak of the distribution of $α$ is at $α\approx-1$. The presence of a low-energy break in the jitter spectrum at oblique angles also explains the appearance of a soft X-ray component in some GRBs and a relatively small number of them. We emphasize that our theory is based solely on the first principles and contains no {\it ad hoc} (phenomenological) assumptions.
description: 5 pages, 3 figures, accepted to ApJ
Currículo e cultura: os estudos antropológicos que adentram os muros da escola
Creators: name: Ianca Miranda
Publisher: name: figshare
Year: 2020
Subjects: Education

description: Este texto busca uma compreensão sobre a relação entre cultura e currículo, educação e antropologia. Parte de uma pesquisa bibliográfica de abordagem qualitativa, subsidiada nos pensamentos de Moreira e Candau (2007), Silva (2011), Saviani (2006), Arroyo (2013), Gusmão (1997), Oliveira, Búrigo e Boin (2016). Inicia com uma exposição de conceitos sobredo termo “currículo”, para, então, realizar um debate sobre sua relação com a cultura, a partir de aportes teóricos dos estudos antropológicos desenvolvidos no âmbito escolar e sobre educação, em geral. Conclui que esses estudos contribuem para um movimento de suporte àreinvindicação ao respeito e à igualdade, para a elaboração de uma ação pedagógica que englobe conhecimentos científicos e sociais na sala de aula, em vista da compreensão da diversidade cultural no ambiente escolar.
A Galactic Plane Relative Extinction Map from 2MASS
Creators: name: Froebrich, D.
name: Ray, T. P.
name: Murphy, G. C.
name: Scholz, A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present three 14400 square degree relative extinction maps of the Galactic Plane (|b|<20degrees) obtained from 2MASS using accumulative star counts (Wolf diagrams). This method is independent of the colour of the stars and the variation of extinction with wavelength. Stars were counted in 3.5'x3.5' boxes, every 20". 1x1degree surrounding fields were chosen for reference, hence the maps represent local extinction enhancements and ignore any contribution from the ISM or very large clouds. Data reduction was performed on a Beowulf-type cluster (in approximately 120 hours). Such a cluster is ideal for this type of work as areas of the sky can be independently processed in parallel. We studied how extinction depends on wavelength in all of the high extinction regions detected and within selected dark clouds. On average a power law opacity index (β) of 1.0 to 1.8 in the NIR was deduced. The index however differed significantly from region to region and even within individual dark clouds. That said, generally it was found to be constant, or to increase, with wavelength within a particular region.
description: 4 pages, 2 figures, A&A Letters accepted, version with high resolution figures at http://www.dias.ie/~df
For a conscious management of landscapes and habitats in the Swiss Alpine Region -the National Research Programme 48 (PNR 48)
Creators: name: Lehmann, Bernard
name: Stucki, Erwin
name: Lehmann, Bernard
name: Stucki, Erwin
Publisher: name: Unknown
Year: 2003
Subjects: Environmental Economics and Policy

description: The contribution outlines the goals, the organisational structures and the key issues of the NRP 48 (National Research Programme). In addition, it gives an overview of the subjects covered by the 35 on-going research projects. On this basis, the stakeholders dealing with subjects relating to Landscapes and Habitats are invited to take into account the knowledge gained from the NRP 48 within their field of activity. Furthermore, the author invites the reader to a dialogue with the research teams and the programme leaders.
Hardcore Magnons in the S=1/2 Heisenberg Model on the Square Lattice
Creators: name: Schmidt, Kai P.
name: Uhrig, Götz S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We propose a versatile approach to treat commonly arising constraints. It is illustrated for interacting magnons of the Heisenberg antiferromagnet on a square lattice. For systems of $L\times L$ sites a non-perturbative continuous unitary transformation (CUT) is used to derive an effective Hamiltonian conserving the number of magnons. They are bosonic particles with a hardcore constraint which is captured by a local, repulsive interaction U. The limits $U\to\infty$ and $L\to\infty$ are achieved by extrapolation. The residual spin gap $Δ_1$ is smaller than 0.01J reflecting the gapless nature of the magnons. The one-magnon dispersion displays all known characteristics.
description: 4 pages, 3 figures
ATP hydrolysis stimulates large length fluctuations in single actin filaments
Creators: name: Stukalin, Evgeny B.
name: Kolomeisky, Anatoly B.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Biomolecules (q-bio.BM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Polymerization dynamics of single actin filaments is investigated theoretically using a stochastic model that takes into account the hydrolysis of ATP-actin subunits, the geometry of actin filament tips, the lateral interactions between the monomers as well as the processes at both ends of the polymer. Exact analytical expressions are obtained for a mean growth velocity and for dispersion in length fluctuations. It is found that the ATP hydrolysis has a strong effect on dynamic properties of single actin filaments. At high concentrations of free actin monomers the mean size of unhydrolyzed ATP-cap is very large, and the dynamics is governed by association/dissociation of ATP-actin subunits. However, at low concentrations the size of the cap becomes finite, and the dissociation of ADP-actin subunits makes a significant contribution to overall dynamics. Actin filament length fluctuations reach the maximum at the boundary between two dynamic regimes, and this boundary is always larger than the critical concentration. Random and vectorial mechanisms of hydrolysis are compared, and it is found that they predict qualitatively similar dynamic properties. The possibility of attachment and detachment of oligomers is also discussed. Our theoretical approach is successfully applied to analyze the latest experiments on the growth and length fluctuations of individual actin filaments.
description: Submitted to Biophysical Journal
A System Dynamics approach for the investigation of peripheral and agrarian communities
Creators: name: Kopainsky, Birgit
name: Rieder, Peter
name: Buchli, Simon
name: Kopainsky, Birgit
name: Rieder, Peter
name: Buchli, Simon
Publisher: name: Unknown
Year: 2003
Subjects: Community/Rural/Urban Development
Research Methods/ Statistical Methods

description: In this paper an alternative approach for the analysis of rural development in peripheral and agrarian communities in the Swiss Alps is developed. It is based on System Dynamics, a qualitative and quantitative methodology on the structure and behaviour of complex systems. In the qualitative part, system elements and their interconnections are identified and a descriptive networktype model of the strategically relevant issues faced by peripheral and agrarian communities is developed. In the quantitative part, a dynamic simulation model is built as a decision support tool for the evaluation of different policy measures. Preliminary results from the application of the methodology to the Muenstertal confirm the need for this holistic view of the processes affecting rural development. However, they also emphasise the need of a sound theoretical background and of the integration of other methodical approaches. Model simulations for the case study region strongly emphasise that sectoral policies are not sufficient for an integrated rural development. Policies have to be elaborated and implemented simultaneously and on an interdisciplinary basis. It is especially important to pay attention to the aspects of social changes and change of lifestyles as they showed a far reaching impact on system behaviour.
ACRONYM IV: Three New, Young, Low-mass Spectroscopic Binaries
Creators: name: Flagg, Laura
name: Shkolnik, Evgenya L.
name: Weinberger, Alycia
name: Bowler, Brendan P.
name: Skiff, Brian
name: Kraus, Adam L.
name: Liu, Michael C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: As part of our search for new low-mass members of nearby young moving groups (YMG), we discovered three low-mass, spectroscopic binaries, two of which are not kinematically associated with any known YMG. Using high-resolution optical spectroscopy, we measure the component and systemic radial velocities of the systems, as well as their lithium absorption and H$α$ emission, both spectroscopic indicators of youth. One system (2MASS J02543316-5108313, M2.0+M3.0) we confirm as a member of the 40 Myr old Tuc-Hor moving group, but whose binarity was previously undetected. The second young binary (2MASS J08355977-3042306, K5.5+M1.5) is not a kinematic match to any known YMG, but each component exhibits lithium absorption and strong and wide H$α$ emission indicative of active accretion, setting an upper age limit of 15 Myr. The third system (2MASS J10260210-4105537, M1.0+M3.0) has been hypothesized in the literature to be a member of the 10 Myr old TW Hya Association (TWA), but with our measured systemic velocity, shows the binary is in fact not part of any known YMG. This last system also has lithium absorption in each component, and has strong and variable H$α$ emission, setting an upper age limit of 15 Myr based on the lithium detection.
description: published in ApJ
Self-Consistent Perturbation Theory for Thermodynamics of Magnetic Impurity Systems
Creators: name: Otsuki, J.
name: Kusunose, H.
name: Kuramoto, Y.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Integral equations for thermodynamic quantities are derived in the framework of the non-crossing approximation (NCA). Entropy and specific heat of 4f contribution are calculated without numerical differentiations of thermodynamic potential. The formulation is applied to systems such as PrFe4P12 with singlet-triplet crystalline electric field (CEF) levels.
description: 3 pages, 2 figures, proc. ASR-WYP-2005 (JAERI)
Terzoli, Ricardo: Il tema della beatitudine nei padri siri
Creators: name: Davids, Adelbert
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2024

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 60 (1976): Oriens christianus, Band 60
Deliberation, Responsivity and Power in German and Swiss Agricultural Policy
Creators: name: Mann, Stefan
name: Mann, Stefan
Publisher: name: Unknown
Year: 2005
Subjects: Agricultural and Food Policy

description: Preferences with respect to agricultural policy have changed in Germany and Switzerland. In the middle of the 20th century, food self sufficiency and a certain cultural solidarity with farmers were central issues. Today, farmers are expected to contribute to environmental protection and safe food. Switzerland and Germany are two examples of countries where national agricultural policies have attempted to take the changing preferences into account. However, in Germany the government had a hard time succeeding since the general features of agricultural policy are decided by the EU. Comparing Germany with Switzerland indicates that it might be more appropriate to decide on agricultural policy on the national rather than on a regional or supranational level.
Two populations of coupled quadratic maps exhibit a plentitude of symmetric and symmetry broken dynamics
Creators: name: Andrzejak, Ralph G.
name: Ruzzene, Giulia
name: Schöll, Eckehard
name: Omelchenko, Iryna
Publisher: name: Technische Universität Berlin
Year: 2020
Subjects: subject: 530 Physik
subject: chimeras
subject: quadratic maps
subject: dynamics
subject: symmetry
subject: broken symmetry
subject: network

description: This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Chaos 30, 033125 (2020) and may be found at https://doi.org/10.1063/5.0002272.
description: We numerically study a network of two identical populations of identical real-valued quadratic maps. Upon variation of the coupling strengths within and across populations, the network exhibits a rich variety of distinct dynamics. The maps in individual populations can be synchronized or desynchronized. Their temporal evolution can be periodic or aperiodic. Furthermore, one can find blends of synchronized with desynchronized states and periodic with aperiodic motions. We show symmetric patterns for which both populations have the same type of dynamics as well as chimera states of a broken symmetry. The network can furthermore show multistability by settling to distinct dynamics for different realizations of random initial conditions or by switching intermittently between distinct dynamics for the same realization. We conclude that our system of two populations of a particularly simple map is the most simple system that can show this highly diverse and complex behavior, which includes but is not limited to chimera states. As an outlook to future studies, we explore the stability of two populations of quadratic maps with a complex-valued control parameter. We show that bounded and diverging dynamics are separated by fractal boundaries in the complex plane of this control parameter.
Nuclear X-ray Activity in Low-Surface-Brightness Galaxies: Prospects for Constraining the Local Black Hole Occupation Fraction with a Chandra Successor Mission
Creators: name: Hodges-Kluck, Edmund
name: Gallo, Elena
name: Seth, Anil
name: Greene, Jenny
name: Baldassare, Vivienne
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: About half of nearby galaxies have a central surface brightness >1 magnitude below that of the sky. The overall properties of these low-surface-brightness galaxies (LSBGs) remain understudied, and in particular we know very little about their massive black hole population. This gap must be closed to determine the frequency of massive black holes at z=0 as well as to understand their role in regulating galaxy evolution. Here we investigate the incidence and intensity of nuclear, accretion-powered X-ray emission in a sample of 32 nearby LSBGs with the Chandra X-ray Observatory. A nuclear X-ray source is detected in 4 galaxies (12.5%). Based on an X-ray binary contamination assessment technique developed for normal galaxies, we conclude that the detected X-ray nuclei indicate low-level accretion from massive black holes. The active fraction is consistent with that expected from the stellar mass distribution of the LSBGs, but not their total baryonic mass, when using a scaling relation from an unbiased X-ray survey of normal galaxies. This suggests that their black holes co-evolved with their stellar population. In addition, the apparent agreement nearly doubles the number of galaxies available within ~100 Mpc for which a measurement of nuclear activity can efficiently constrain the frequency of black holes as a function of stellar mass. We conclude by discussing the feasibility of measuring this occupation fraction to a few percent precision below 1e10 solar masses with high-resolution, wide-field X-ray missions currently under consideration.
description: 17 pages, accepted by ApJ
Holographic Renormalization of Probe D-Branes in AdS/CFT
Creators: name: Karch, Andreas
name: O'Bannon, Andy
name: Skenderis, Kostas
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We perform holographic renormalization for probe branes in AdS_5 x S^5. We show that for four known probe D-branes wrapping an AdS_m x S^n, the counterterms needed to render the action finite are identical to those for the free, massive scalar in AdS_m plus counterterms for the renormalization of the volume of AdS_m. The four cases we consider are the probe D7, two different probe D5's and a probe D3. In the D7 case there are scheme-dependent finite counterterms that can be fixed by supersymmetry.
description: 22 pages; minor corrections, 5 references added, added calculation of boundary two-point functions from fluctuations in AdS
Currículo e cultura: A necessidade de um currículo que vá além dos muros da escola
Creators: name: Ianca Miranda
Publisher: name: figshare
Year: 2020
Subjects: subject: 130299 Curriculum and Pedagogy not elsewhere classified
subject: FOS: Educational sciences

description: Este artigo tem por objetivo analisar a influência da cultura no currículo escolar, na forma em que a cultura implica na seleção de um currículo, na seletividade dos assuntos a serem abordados. Para tanto, foi necessário compreender a relação entre cultura e currículo, através da análise de artigos e livros, caracterizando a pesquisa como bibliográfica. O texto apresenta a forma como a cultura está incorporada no currículo, de forma estática ou dinâmica como propõe Silva (1999) . As representações sociais são determinantes na elaboração do currículo escolar, no momento que estipulamos o tipo de educação que é cabível ensinar. Inicia-se por falar da cultura e sua relação com o currículo, destacando o currículo como um lugar de disputa (ARROYO, 2011) e de significação (SILVA, 1999). Em seguida, parte-se para o debate da produção da diferença na Pedagogia Cultural (CORAZZA, 2004) e da importância de trazer o contexto do aluno para a escola (MOREIRA & CANDAU, 2007). A partir dessa análise, foi possível concluir que existe uma multiplicidade cultural que devem ser incorporadas no currículo escolar, a escola não pode ser algo a parte do contexto social do aluno, pois a educação é um reflexo das relações sociais e culturais, e, por esse motivo, deve trabalhar estas representações culturais e sociais que a influenciam na sala de aula, o currículo escolar deve ir além dos muros escolares.
Projeto Interdisciplinar como Instrumento Pedagógico para a Educação Patrimonial dos Alunos no Ambiente Escolar
Creators: name: Ianca Miranda
Publisher: name: figshare
Year: 2020
Subjects: subject: 130313 Teacher Education and Professional Development of Educators
subject: FOS: Educational sciences

description: Este trabalho apresenta o descritivoexposição de um Projeto de Intervenção aplicado emescola pública da cidade de Belém (PA), desenvolvidadurante o componente do curso SupervisionadoGestão e Coordenação Pedagógica emAmbientes Escolares, durante o curso de Pedagogiada Universidade Federal do Pará, de14 a 28 de novembro de 2019. O objetivo éproduzir uma análise de projetos com transversaltemas desenvolvidos por estudantes de graduação eaplicada em escolas sob a interdisciplinaridadeprisma, com o objetivo de Educação Patrimonial deos alunos e, também, como o desenvolvimento deessas ações impactam a comunidade escolar equais são suas conseqüências navida prática relativa ao cuidado dapatrimônio material da escola. Os resultados mostram quedesenvolvimento de projetos de forma interdisciplinarperspectiva requer diálogo entregestão, coordenação pedagógica, professorese alunos responsáveis ​​pela preparação eexecução dos projetos apresentados, buscandoharmonizar sua implementação para que não hajadanos à carga de trabalho obrigatória proposta parao ano acadêmico dos alunos. alunos. Portanto,é evidente a necessidade de intervenções queabordar temas transversais em uminterdisciplinar, em particular, que abordamo tópico Educação patrimonial com ensino básicoEstudantes de educação, para que eles percebam oimportância de cuidar do patrimônio da escola comobem comum a todos, uma vez que, se preservados,proporcionar uma melhor qualidade no desenvolvimento dofunção social da escola.
Сімейна терапія: Підходи та процес / Family therapy: Approaches and the process
Creators: name: Burlaka, Viktor
name: Бурлака, Віктор
Publisher: name: figshare
Year: 2020
Subjects: subject: 160701 Clinical Social Work Practice
subject: FOS: Sociology

description: The paper reviews literature on family therapy approaches and processes
The fate of silver nanoparticles in riverbank filtration systems — The role of biological components and flow velocity
Creators: name: Degenkolb, Laura
name: Leuther, Frederic
name: Lüderwald, Simon
name: Philippe, Allan
name: Metreveli, George
name: Amininejad, Sayed
name: Vogel, Hans-Jörg
name: Kaupenjohann, Martin
name: Klitzke, Sondra
Publisher: name: Technische Universität Berlin
Year: 2019
Subjects: subject: 551 Geologie, Hydrologie, Meteorologie
subject: nanomaterial
subject: long-term experiment
subject: water-saturated transport
subject: near-natural condition
subject: biological retention
subject: mechanical filtration

description: Riverbank filtration is a natural process that may ensure the cleaning of surface water for producing drinking water. For silver nanoparticles (AgNP), physico-chemical interaction with sediment surfaces is one major retention mechanism. However, the effect of flow velocity and the importance of biological retention, such as AgNP attachment to biomass, are not well understood, yet. We investigated AgNP (c = 0.6 mg L−1) transport at different spatial and temporal scales in pristine and previously pond water-aged sediment columns. Transport of AgNP under near-natural conditions was studied in a long-term riverbank filtration experiment over the course of one month with changing flow scenarios (i.e. transport at 0.7 m d−1, stagnation, and remobilization at 1.7 m d−1). To elucidate retention processes, we conducted small-scale lab column experiments at low (0.2 m d−1) and high (0.7 m d−1) flow rate using pristine and aged sediments. Overall, AgNP accumulated in the upper centimeters of the sediment both in lab and outdoor experiments. In the lab study, retention of AgNP by attachment to biological components was very effective under high and low flow rate with nearly complete NP accumulation in the upper 2 mm. When organic material was absent, abiotic filtration mechanisms led to NP retention in the upper 5 to 7 cm of the column. In the long-term study, AgNP were transported up to a depth of 25 cm. For the pristine sediment in the lab study and the outdoor experiments only erratic particle breakthrough was detected in a depth of 15 cm. We conclude that physico-chemical interactions of AgNP with sediment surfaces are efficient in retaining AgNP. The presence of organic material provides additional retention sites which increase the filtration capacity of the system. Nevertheless, erratic breakthrough events might transport NP into deeper sediment layers.
Alegoria à educação: uma aplicação da metodologia de análise do autor Joaquim Severino na obra a república, de Platão
Creators: name: Ianca Miranda
Publisher: name: figshare
Year: 2020
Subjects: Education

description: Busca-se atingir dois objetivos com este trabalho: demonstrar a metodologia proposta por Severino (1996) para leitura, análise e interpretação de textos; e compreender o conceito de educação intrínseco à Alegoria de Platão. Para tanto, realizou-se as três análises das diretrizes para a leitura, análise e interpretação de textos – textual, temática e a crítico interpretativa – propostas por Severino (1996). O Livro VII da obra A República, de Platão, apresenta uma alegoria introduzida pela percepção de verdade do homem em relação ao mundo, desenvolvida em torno do pensamento da existência de uma realidade dessa verdade (mundo inteligível), que deve ser descoberta pelo homem para que saia da ignorância, concluindo que a educação correta (presente para ele no ensino do cálculo e da aritmética) leva o homem à reflexão e conduz a alma para o ser, relacionando conhecimento e educação, além de destacar a suas influências na política. Conclui-se que essas diretrizes possibilitam a compreensão e crítica de textos teóricos e tornam mais fluida a leitura a análise textual,possibilitando chegarmos à consideração do pensamento platônico como atemporal e influenciador no campo da educação.
Lithium and Lithium Depletion in Halo Stars on Extreme Orbits
Creators: name: Boesgaard, Ann Merchant
name: Stephens, Alex
name: Deliyannis, Constantine P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have determined Li abundances in 55 metal-poor (3.6 < [Fe/H] < -0.7) stars with extreme orbital kinematics. We find the Li abundance in the Li-plateau stars and examine its decrease in low-temperature, low-mass stars. The Li observations are primarily from the Keck I telescope with HIRES (spectral resolution of ~48,000 and median signal-to-noise per pixel of 140). Abundances or upper limits were determined for Li for all the stars with typical errors of 0.06 dex. Our 14 stars on the Li plateau give A(Li) = log N(Li)/N(H) + 12.00 of 2.215 +-0.110, consistent with earlier results. We find a dependence of the Li abundance on metallicity as measured by [Fe/H] and the Fe-peak elements [Cr/H] and [Ni/H], with a slope of ~0.18. We also find dependences of A(Li) with the alpha elements, Mg, Ca, and Ti. For the n-capture element, Ba, the relation between A(Li) and [Ba/H] has a shallower slope of 0.13; over a range of 2.6 dex in [Ba/H], the Li abundance spans only a factor of two. We examined the possible trends of A(Li) with the characteristics of the orbits of our halo stars, but find no relationship with kinematic or dynamic properties. The stars cooler than the Li plateau are separated into three metallicity subsets. The decrease in A(Li) sets in at hotter temperatures at high metallicities than at low metallicities; this is in the opposite sense of the predictions for Li depletion from standard and non-standard models.
description: 29 pages including 3 tables and 12 figures Accepted by The Astrophysical Journal, for the 1 November 2005 issue, v. 633