cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Evolution of Coated Grains in Spiral Shocks of Self-Gravitating Protoplanetary Disks
Creators: name: Podolak, M.
name: Mayer, L.
name: Quinn, T.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We investigate the evolution of grains composed of an ice shell surrounding an olivine core as they pass through a spiral shock in a protoplanetary disk. We use published three-dimensional radiation-hydrodynamics simulations of massive self-gravitating protoplanetary disks to extract the thermodynamics of spiral shocks in the region between 10 and 20 AU from the central star. As the density wave passes, it heats the grains, causing them to lose their ice shell and resulting in a lowering of the grain opacity. In addition, since grains of different sizes will have slightly different temperatures, there will be a migration of ice from the hotter grains to the cooler ones. The rate of migration depends on the temperature of the background gas, so a grain distribution that is effectively stable for low temperatures, can undergo an irreversible change in opacity if the gas is temporarily heated to above $\sim 150$\,K. We find that the opacity can drop more, and at a significantly faster rate throughout the spiral shocks relative to the prediction of standard dust grains models adopted in hydrodynamical calculations of protoplanetary disks. This would lead to faster gas cooling within spiral arms. We discuss the implications of our results on the susceptibility of disk fragmentation into sub-stellar objects at distances of a few tens of astronomical units.
description: 28 pages; 9 figures. To appear in Ap.J
title: Can Small Molecules Provide Clues on Disease Progression in Cerebrospinal Fluid from Mild Cognitive Impairment and Alzheimer’s Disease Patients?
Creators: name: Begoña Talavera Andújar
name: Arnaud Mary
name: Carmen Venegas Maldonado
name: Tiejun Cheng
name: Leonid Zaslavsky
name: Evan E. Bolton
name: Michael Heneka
name: Emma Schymanski
Publisher: name: LCSB
Year: 2023

description: Alzheimer’s Disease (AD) is a complex and multifactorial neurodegenerative disease, which is currently diagnosed via clinical symptoms and non-specific biomarkers (Aβ1-42, t-Tau, and p-Tau) measured in cerebrospinal fluid (CSF), which alone do not provide sufficient insights into disease progression. In this pilot study, these biomarkers were complemented with small molecule analysis using non-target high resolution mass spectrometry (NT-HRMS) coupled to liquid chromatography (LC) on the CSF of three groups; AD, Mild Cognitive Impairment (MCI) due to AD, and a non-demented control group (ND).  An open-source cheminformatics pipeline based on MS-DIAL and patRoon was enhanced using CSF- and AD-specific suspect lists to assist in data interpretation. ChemRICH analysis revealed a significant increase of hydroxybutyrates in AD, including 3-hydroxy butanoic acid (BHBA), which was found at higher levels in AD compared to MCI and ND. Furthermore, a highly sensitive target LC-MS method was used to quantify 35 bile acids (BAs) in the CSF, revealing several statistically significant differences including higher dehydrolithocholic acid levels and decreased conjugated BAs levels in AD. This work provides several promising small molecule hypotheses that could be used to help track the progression of AD in CSF samples.
Letter of Recommendation for Ruth Perry from Rowena S. Hadsell, July 10, 1940
Creators: name: Hadsell, Rowena Saeger
Publisher: name: Columbia University
Year: 2019
Subjects: Race relations
African Americans--Social conditions
Endowments

description: Letter of recommendation by Carnegie-Myrdal Study secretary Rowena S. Hadsell for Ruth Perry's application to the Atlanta University School of Social Work.
Unusual resonances in nanoplasmonic structures due to nonlocal response
Creators: name: Raza, Søren
name: Toscano, Giuseppe
name: Jauho, Antti-Pekka
name: Wubs, Martijn
name: Mortensen, N. Asger
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We study the nonlocal response of a confined electron gas within the hydrodynamical Drude model. We address the question whether plasmonic nanostructures exhibit nonlocal resonances that have no counterpart in the local-response Drude model. Avoiding the usual quasi-static approximation, we find that such resonances do indeed occur, but only above the plasma frequency. Thus the recently found nonlocal resonances at optical frequencies for very small structures, obtained within quasi-static approximation, are unphysical. As a specific example we consider nanosized metallic cylinders, for which extinction cross sections and field distributions can be calculated analytically.
description: 5 pages, 2 figures. Accepted as a PRB Rapid Communication, revised title, minor changes to the text
New constraints on Parity Symmetry from a re-analysis of the WMAP-7 low resolution power spectra
Creators: name: Gruppuso, A.
name: Finelli, F.
name: Natoli, P.
name: Paci, F.
name: Cabella, P.
name: De Rosa, A.
name: Mandolesi, N.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The Parity symmetry of the Cosmic Microwave Background (CMB) pattern as seen by WMAP 7 is tested jointly in temperature and polarization at large angular scale. A Quadratic Maximum Likelihood (QML) estimator is applied to the WMAP 7 year low resolution maps to compute all polarized CMB angular power spectra. The analysis is supported by 10000 realistic Monte-Carlo realizations. We confirm the previously reported Parity anomaly for TT in the range $δ\ell=[2,22]$ at $> 99.5%$ C.L.. No anomalies have been detected in TT for a wider $\ell$ range (up to $\ell_{max}=40$). No violations have been found for EE, TE and BB which we test here for the first time. The cross-spectra TB and EB are found to be consistent with zero. We also forecast {\sc Planck} capabilities in probing Parity violations on low resolution maps.
description: 8 pages, 6 figures, 4 tables. Accepted for publication in MNRAS
Coherently manipulating cold ions in separated traps by their vibrational couplings
Creators: name: Zhang, Miao
name: Wei, L. F.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Recent experiments [K. R. Brown, et al., Nature 471, 196 (2011); and M. Harlander, et al., Nature 471, 200 (2011)] have demonstrated the coherent manipulations on the external vibrations of two ions, confined individually in the separated ion traps. Using these recently developed techniques, we propose here an approach to realize the coherent operations, e.g., the universal quantum gates, between the separated ion-trap qubits encoded by two internal atomic states of the trapped ions. Our proposal operates beyond the usual Lamb-Dicke limits, and could be applied to the scalable ion traps coupled by their vibrations.
description: 4 pages, 2 figures
Thermal production of relativistic Majorana neutrinos: Strong enhancement by multiple soft scattering
Creators: name: Anisimov, Alexey
name: Besak, Denis
name: Bodeker, Dietrich
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The production rate of heavy Majorana neutrinos is relevant for models of thermal leptogenesis in the early Universe. In the high temperature limit the production can proceed via the 1 2 (inverse) decays which are allowed by the thermal masses. We consider new production mechanisms which are obtained by including additional soft gauge interactions with the plasma. We show that an arbitrary number of such interactions gives leading order contributions, and we sum all of them. The rate turns out to be smooth in the region where the 1 2 processes are kinematically forbidden. At higher temperature it is enhanced by a factor 3 compared to the 1 2 rate.
description: 26 pages, 8 figures; added references, added comments on 2 to 2 scattering processes, improved appearance of fig. 8, corrected typos; matches published version
Detecting non-Abelian statistics of Majorana fermions in quantum nanowire networks
Creators: name: Xue, Zheng-Yuan
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a scheme in semiconducting quantum nanowires structure to demonstrate the non-Abelian statistics for Majorana fermions in terms of braid group. The Majorana fermions are localized at the endpoints of semiconducting wires, which are deposited on an \emph{s}-wave superconductor. The non-Abelian nature of Majorana fermion is manifested by the fact that the output of the different applied orders of two operations, constructed by the braid group elements, are different. In particular, the difference can be unambiguously imprinted on the quantum states of a superconducting flux qubit.
description: V1, accepted for publication at JETP Letters; v2, typos corrected
Relations between Neutrino and Charged Fermion Masses
Creators: name: Gu, Pei-Hong
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We find an intriguing relation between neutrino and charged fermion masses, $|m_{ν_3^{}}^2- m_{ν_1^{}}^2| : (m_{ν_2^{}}^2- m_{ν_1^{}}^2):: V_{tb}^4 m_τ^2 m_b^2/m_t^2 : V_{cs}^4 m_μ^2 m_s^2/m_c^2$. We further indicate this relation can be predicted by a left-right symmetric model.
description: 4 pages, 1 figure. Model is slightly corrected. Title is changed. Journal version
Exploring singlet deflection of gauge mediation
Creators: name: de Blas, J.
name: Delgado, A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We embed the Next-to Minimal Supersymmetric Standard Model into gauge mediation of supersymmetry breaking and study the phenomenology of scenarios where the gauge-mediation contributions to soft parameters are deflected by superpotential interactions of the gauge singlet with the messenger fields and the Higgs doublets. This kind of models provide a satisfactory solution to the mu-b_mu problem of gauge mediation, compatible with the adequate pattern of electroweak symmetry breaking and a realistic spectrum with supersymmetric partners at the TeV scale without requiring a significant fine tuning.
description: Latex 18 pages, 4 eps figures. Minor corrections, version published in Phys. Rev. D
D1.3. Public design and FAST models of the two 15MW floater-turbine concepts
Creators: name: Mahfouz, Youssef
name: Salari, Mohammad
name: Vigara, Fernando
name: Hernandez, Sergio
name: Climent Molins
name: Trubat, Pau
name: Bredmose, Henrik
name: Pegalajar-Jurado, Antonio
Publisher: name: Zenodo
Year: 2020
Subjects: COREWIND project
Horizon2020
Renewable Energy
Wind
Floating Wind Energy

description: This report is the Deliverable D1.3; were we present two floating OpenFAST models for the WindCrete spar and the ActiveFloat semi-submersible. The floaters are designed for the IEA Wind 15MW reference wind turbine. Moreover, Ultimate Limit State (ULS) load cases are selected for the mooring and dynamic cable design in COREWIND.
description: This deliverable is a draft version, and still under revision by the EC
Pulsar-Black Hole Binaries in the Galactic Center
Creators: name: Faucher-Giguere, C. -A.
name: Loeb, Abraham
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Binaries consisting of a pulsar and a black hole (BH) are a holy grail of astrophysics, both for their significance for stellar evolution and for their potential application as probes of strong gravity. In spite of extensive surveys of our Galaxy and its system of globular clusters, no pulsar-black hole (PSR-BH) binary has been found to date. Clues as to where such systems might exist are therefore highly desirable. We show that if the central parsec around Sgr A* harbors a cluster of ~25,000 stellar BHs (as predicted by mass segregation arguments) and if it is also rich in recycled pulsar binaries (by analogy with globular clusters), then 3-body exchange interactions should produce PSR-BHs in the Galactic center. Simple estimates of the formation rate and survival time of these binaries suggest that a few PSR-BHs should be present in the central parsec today. The proposed formation mechanism makes unique predictions for the PSR-BH properties: 1) the binary would reside within ~1 pc of Sgr A*; 2) the pulsar would be recycled, with a period of ~1 to a few tens of milliseconds, and a low magnetic field B~3 AU. The potential discovery of a PSR-BH binary therefore provides a strong motivation for deep, high-frequency radio searches for recycled pulsars toward the Galactic center.
description: 13 pages, 1 figure
Generic master equations for quasi-normal frequencies
Creators: name: Skakala, Jozef
name: Visser, Matt
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Generic master equations governing the highly-damped quasi-normal frequencies [QNFs] of one-horizon, two-horizon, and even three-horizon spacetimes can be obtained through either semi-analytic or monodromy techniques. While many technical details differ, both between the semi-analytic and monodromy approaches, and quite often among various authors seeking to apply the monodromy technique, there is nevertheless widespread agreement regarding the the general form of the QNF master equations. Within this class of generic master equations we can establish some rather general results, relating the existence of "families" of QNFs of the form omega_{a,n} = (offset)_a + i n (gap) to the question of whether or not certain ratios of parameters are rational or irrational.
description: 23 pages; V2: Minor additions, typos fixed. Matches published version
Computations in Finite Groups and Quantum Physics
Creators: name: Kornyak, Vladimir V.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Mathematical core of quantum mechanics is the theory of unitary representations of symmetries of physical systems. We argue that quantum behavior is a natural result of extraction of "observable" information about systems containing "unobservable" elements in their descriptions. Since our aim is physics where the choice between finite and infinite descriptions can not have any empirical consequences, we consider the problem in the finite background. Besides, there are many indications from observations - from the lepton mixing data, for example - that finite groups underly phenomena in particle physics at the deep level. The "finite" approach allows to reduce any quantum dynamics to the simple permutation dynamics, and thus to express quantum observables in terms of permutation invariants of symmetry groups and their integer characteristics such as sizes of conjugate classes, sizes of group orbits, class coefficients, dimensions of representations. Our study has been accompanied by computations with finite groups, their representations and invariants. We have used both our C implementation of algorithms for working with groups and computer algebra system GAP.
description: 17 p., to be published in LNCS; v2: changes to match to published paper
Intersections of thick Center Vortices, Dirac Eigenmodes and Fractional Topological Charge in SU(2) Lattice Gauge Theory
Creators: name: Höllwieser, Roman
name: Faber, Manfried
name: Heller, Urs M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Intersections of thick, plane SU(2) center vortices are characterized by the topological charge |Q|=1/2. We compare such intersections with the distribution of zeromodes of the Dirac operator in the fundamental and adjoint representation using both the overlap and asqtad staggered fermion formulations in SU(2) lattice gauge theory. We analyze configurations with four intersections and find that the probability density distribution of fundamental zeromodes in the intersection plane differs significantly from the one obtained analytically in [Phys.\ Rev.\ D 66, 85004 (2002)]. The Dirac eigenmodes are clearly sensitive to the traces of the Polyakov (Wilson) lines and do not exactly locate topological charge contributions. Although, the adjoint Dirac operator is able to produce zeromodes for configurations with topological charge |Q|=1/2, they do not locate single vortex intersections, as we prove by forming arbitrary linear combinations of these zeromodes - their scalar density peaks at least at two intersection points. With pairs of thin and thick vortices we realize a situation similar to configurations with topological charge |Q|=1/2. For such configurations the zeromodes do not localize in the regions of fractional topological charge contribution but spread over the whole lattice, avoiding regions of negative traces of Polyakov lines.
description: 21 pages, 9 figures
Detection of bound entanglement in continuous variable systems
Creators: name: Zhang, Cheng-Jie
name: Nha, Hyunchul
name: Zhang, Yong-Sheng
name: Guo, Guang-Can
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present several entanglement conditions in order to detect bound entangled states in continuous variable systems. Specifically, Werner and Wolf [Phys. Rev. Lett. 86, 3658 (2001)] and Horodecki and Lewenstein [Phys. Rev. Lett. 85, 2657 (2000)] have proposed examples of bound entangled Gaussian state and bound entangled non-Gaussian state, respectively, of which entanglement can be detected by using our entanglement conditions.
description: 5 pages, 1 figure
Ophrys ×bodegomii (Ophrys passionis × Ophrys tenthredinifera) Nuevo híbrido de la Península Ibérica.
Creators: name: Romieg Soca
Publisher: name: Zenodo
Year: 2001

description: Benito Ayuso J., Hermosilla C. E. & Soca R., 2001. Ophrys ×bodegomii (Ophrys passionis × Ophrys tenthredinifera) Nuevo híbrido de la Península Ibérica. Estudios del Museo de Ciencias Naturales de Álava 16: 89-92.
Emission of Mitochondrial Biophotons and their Effect on Electrical Activity of Membrane via Microtubules
Creators: name: Rahnama, M.
name: Bokkon, I.
name: Tuszynski, J.
name: Cifra, M.
name: Sardar, P.
name: Salari, V.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Neurons and Cognition (q-bio.NC)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: In this paper we argue that, in addition to electrical and chemical signals propagating in the neurons of the brain, signal propagation takes place in the form of biophoton production. This statement is supported by recent experimental confirmation of photon guiding properties of a single neuron. We have investigated the interaction of mitochondrial biophotons with microtubules from a quantum mechanical point of view. Our theoretical analysis indicates that the interaction of biophotons and microtubules causes transitions/fluctuations of microtubules between coherent and incoherent states. A significant relationship between the fluctuation function of microtubules and alpha-EEG diagrams is elaborated on in this paper. We argue that the role of biophotons in the brain merits special attention.
description: 22 pages, 7 figures
Memorandum from Charles Dollard to Frederick P. Keppel, May 23, 1940
Creators: name: Dollard, Charles, 1907-1977
Publisher: name: Columbia University
Year: 2019
Subjects: Race relations
African Americans--Social conditions
Endowments

description: Details of Charles Dollard's meeting with Edwin G. Nourse of the Brookings Institute to discuss research for the Carnegie-Myrdal Study.
Representations of Gender Relations in Turkish Soap Operas and Afghan Audiences' Reception
Creators: name: Qasmi, Hosai
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2020
Subjects: Afghanistan
Afghan media
Afghan audience
encoding and decoding
Entertainment-Education strategy
feminist media studies
reception studies
social change
transnational media

description: Although efforts have been made by the Afghan government and its international partners to promote the tents of gender equality in Afghan society, biases against women and other marginalized groups persist in the society and media sector, particularly. The current study is a timely research because feminist media studies are an under-researched field in the context of Afghanistan. My research aims to be a contribution to this field and open a path for Afghan feminist media studies. The current study explores the representations of gender relations in transnational television soap operas broadcast on Afghan television stations, audiences’ decoding of the representations, and the role of the media in promoting social change. The selected soap operas for the study are Paiman and Qesay Maa, Turkish television soap operas dubbed in the Dari language. The current study is based on feminist theory and feminist methodology, providing a balance of content and reception analysis. Drawing on feminist media studies and focusing on media representations, the content analysis of transnational soap operas echoed previous studies on representations of gender relations and indicated that gender relations are often portrayed in stereotypical and traditional manners. The content analysis further demonstrated that women are objectified in different ways and are often represented as domestic, passive, selfless beings in men’s service. Moreover, relationships between women are often based on rivalry, hatred, and shaming and often without any particular reason. The study also found that contrary to women, men are often represented at outdoor and professional settings. Additionally, grounded on encoding/decoding model through a feminist lens, the thematic analysis of focus group discussions demonstrated that audiences constantly interact with media text and actively make meaning. Interestingly, FGD findings further indicated that as active viewers, both female and male participants, derive multiple and often diverse meanings from the media text. Although both female and male participants problematize the content of transnational soap operas, their interpretations of representations of gender relations and gender equality are dissimilar. The study concludes that transnational soap operas, and the media in general, can play an important role in promoting social change in Afghanistan, particularly gender parity through the Entertainment-Education strategy. However, an intersectional framework is essential in designing EE programmes for promoting gender equality in a diverse society like Afghanistan.
GBT Zpectrometer CO(1-0) Observations of the Strongly-Lensed Submillimeter Galaxies from the Herschel ATLAS
Creators: name: Frayer, D. T.
name: Harris, A. I.
name: Baker, A. J.
name: Ivison, R. J.
name: Smail, Ian
name: Negrello, M.
name: Maddalena, R.
name: Aretxaga, I.
name: Baes, M.
name: Birkinshaw, M.
name: Bonfield, D. G.
name: Burgarella, D.
name: Buttiglione, S.
name: Cava, A.
name: Clements, D. L.
name: Cooray, A.
name: Dannerbauer, H.
name: Dariush, A.
name: De Zotti, G.
name: Dunlop, J. S.
name: Dunne, L.
name: Dye, S.
name: Eales, S.
name: Fritz, J.
name: Gonzalez-Nuevo, J.
name: Herranz, D.
name: Hopwood, R.
name: Hughes, D. H.
name: Ibar, E.
name: Jarvis, M. J.
name: Lagache, G.
name: Leeuw, L. L.
name: Lopez-Caniego, M.
name: Maddox, S.
name: Michalowski, M. J.
name: Omont, A.
name: Pohlen, M.
name: Rigby, E.
name: Rodighiero, G.
name: Scott, D.
name: Serjeant, S.
name: Smith, D. J. B.
name: Swinbank, A. M.
name: Temi, P.
name: Thompson, M. A.
name: Valtchanov, I.
name: van der Werf, P. P.
name: Verma, A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS) has uncovered a population of strongly-lensed submillimeter galaxies (SMGs). The Zpectrometer instrument on the Green Bank Telescope (GBT) was used to measure the redshifts and constrain the masses of the cold molecular gas reservoirs for two candidate high-redshift lensed sources. We derive CO(1-0) redshifts of z=3.042+/-0.001 and z=2.625+/-0.001, and measure molecular gas masses of (1--3)x10^{10}Msun, corrected for lens amplification and assuming a conversion factor of alhpa=0.8 Msun(K km/s pc^2)^{-1}. We find typical L(IR)/L'(CO) ratios of 120+/-40 and 140+/-50 Lsun (K km/s pc^2)^{-1}, which are consistent with those found for local ULIRGs and other high-redshift SMGs. From analysis of published data, we find no evidence for enhanced L(IR)/L'(CO(1-0)) ratios for the SMG population in comparison to local ULIRGs. The GBT results highlight the power of using the CO lines to derive blind redshifts, which is challenging for the SMG population at optical wavelengths given their high obscuration.
description: v1 Submitted to ApJL, 2010 Sept. 11; v2 Accepted by ApJL, 2010 Nov. 19; 15 pages including tables and figures
Memorandum from Charles Dollard to Frederick P. Keppel and Eliza Gaylord, May 24, 1940
Creators: name: Dollard, Charles, 1907-1977
Publisher: name: Columbia University
Year: 2019
Subjects: Race relations
African Americans--Social conditions
Endowments

description: Notes on Charles Dollard's meeting with Samuel A. Stouffer and their decision to opt against working with the Brookings Institution on the Carnegie-Myrdal Study.
Educational Psychologists' Experiences and Perceptions of Reflective Practice
Creators: name: Ohara, Sherly
Publisher: name: University of East London
Year: 2021
Subjects: Educational Psychology
Professional Development
Personal Growth
Reflection
Reflective Practice
Training

description: This study explored Educational Psychologists’ experiences and perceptions of reflective practice. Reflective practice generates significant professional interest. However, it is an area where there has been a lack of research to date. For this study, ten Educational Psychologists, currently practicing in the United Kingdom and the Republic of Ireland, were interviewed. The qualitative data from those interviews was analysed using thematic analysis. Four overarching themes, and eight themes, were identified: Educational Psychologists as Reflective Practitioners (professional interest in reflective practice); Outcome of Reflective Practice (effect on EP role; Dunning-Kruger effect); Wide-Ranging Reflective Space (.means for reflection; enabler of reflective practice; obstacles) and The Way Forward (observation of growth; opportunities for forthcoming development). Participants were generally positive in their views and experiences of reflective practice, feeling that it benefited both their professional practice and their personal wellbeing. In order for the use of reflective practice to grow, it needs to be given greater priority at individual, organisational and governing levels. The lack of an agreed definition of reflective practice was also seen as a barrier. Finally, the study highlighted the importance of continued research into reflective practice.
Letter from Eveline M. Burns to Samuel A. Stouffer, May 21, 1940
Creators: name: Burns, Eveline M. (Eveline Mabel), 1900-1985
Publisher: name: Columbia University
Year: 2019
Subjects: Race relations
African Americans--Social conditions
Endowments

description: Eveline M. Burns of the National Resources Planning Board writes to confirm that Erna Magnus can contribute to the Carnegie-Myrdal Study, and offers suggestions of additional researchers to contribute to the project.
Matter power spectra in dynamical-Dark Energy cosmologies
Creators: name: Fedeli, C.
name: Dolag, K.
name: Moscardini, L.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: (abridged) We used a suite of numerical cosmological simulations in order to investigate the effect of gas cooling and star formation on the large scale matter distribution. The simulations follow the formation of cosmic structures in five different Dark Energy models: the fiducial $Λ$CDM cosmology and four models where the Dark Energy density is allowed to have a non-trivial redshift evolution. For each cosmology we have a control run with dark matter only, in order to allow a direct assessment of the impact of baryonic processes. We found that the power spectra of gas and stars, as well as the total matter power spectrum, are in qualitative agreement with the results of previous works in the framework of the fiducial model, although several quantitative differences exist. We used the halo model in order to investigate the backreaction of gas and stars on the dark matter distribution, finding that it is very well reproduced by increasing the average dark matter halo concentration by 17%, irrespective of the mass. Moving to model universes dominated by dynamical Dark Energy, it turns out that they introduce a specific signature on the power spectra of the various matter components, that is qualitatively independent of the exact cosmology considered. This generic shape is well captured by the halo model, however the finer details of the dark matter power spectrum can be precisely captured only at the cost of a few slight modifications to the ingredients entering the model. The backreaction of baryons onto the dark matter distribution works pretty much in the same way as in the reference $Λ$CDM model. Nonetheless, the increment in average concentration is less pronounced than in the fiducial model (only $\sim 10%$), in agreement with a series of other clues pointing toward the fact that star formation is less efficient when Dark Energy displays a dynamical evolution.
description: 15 pages, 8 figures. Accepted by MNRAS
Simulation of 1+1 dimensional surface growth and lattices gases using GPUs
Creators: name: Schulz, Henrik
name: Ódor, Géza
name: Ódor, Gergely
name: Nagy, Máté Ferenc
Publisher: name: arXiv
Year: 2010
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Cellular Automata and Lattice Gases (nlin.CG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Restricted solid on solid surface growth models can be mapped onto binary lattice gases. We show that efficient simulation algorithms can be realized on GPUs either by CUDA or by OpenCL programming. We consider a deposition/evaporation model following Kardar-Parisi-Zhang growth in 1+1 dimensions related to the Asymmetric Simple Exclusion Process and show that for sizes, that fit into the shared memory of GPUs one can achieve the maximum parallelization speedup ~ x100 for a Quadro FX 5800 graphics card with respect to a single CPU of 2.67 GHz). This permits us to study the effect of quenched columnar disorder, requiring extremely long simulation times. We compare the CUDA realization with an OpenCL implementation designed for processor clusters via MPI. A two-lane traffic model with randomized turning points is also realized and the dynamical behavior has been investigated.
description: 20 pages 12 figures, 1 table, to appear in Comp. Phys. Comm
Knudsen number, ideal hydrodynamic limit for elliptic flow and QGP viscosity in $\sqrt{s}$=62 and 200 GeV Cu+Cu/Au+Au collisions
Creators: name: Chaudhuri, A. K.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Taking into account of entropy generation during evolution of a viscous fluid, we have estimated inverse Knudsen number, ideal hydrodynamic limit for elliptic flow and QGP viscosity to entropy ratio in $\sqrt{s}$=62 and 200 GeV Cu+Cu/Au+Au collisions. Viscosity to entropy ratio is estimated as $η/s=0.17\pm 0.10\pm 0.20$, the first error is statistical, the second one is systematic. In a central Au+Au collision, inverse Knudsen number is $\approx 2.80\pm 1.63$, which presumably small for complete equilibration. In peripheral collisions it is even less. Ideal hydrodynamic limit for elliptic flow is $\sim$40% more than the experimental flow in a central collision.
description: 4 pages, 2 figures, 2 tables. Final version to be published in Phys. Rev. C
Application of Edwards' statistical mechanics to high dimensional jammed sphere packings
Creators: name: Jin, Yuliang
name: Charbonneau, Patrick
name: Meyer, Sam
name: Song, Chaoming
name: Zamponi, Francesco
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The isostatic jamming limit of frictionless spherical particles from Edwards' statistical mechanics [Song \emph{et al.}, Nature (London) {\bf 453}, 629 (2008)] is generalized to arbitrary dimension $d$ using a liquid-state description. The asymptotic high-dimensional behavior of the self-consistent relation is obtained by saddle-point evaluation and checked numerically. The resulting random close packing density scaling $ϕ\sim d\,2^{-d}$ is consistent with that of other approaches, such as replica theory and density functional theory. The validity of various structural approximations is assessed by comparing with three- to six-dimensional isostatic packings obtained from simulations. These numerical results support a growing accuracy of the theoretical approach with dimension. The approach could thus serve as a starting point to obtain a geometrical understanding of the higher-order correlations present in jammed packings.
description: 13 pages, 7 figures
Letter from Arnold M. Rose to Samuel A. Stouffer, May 18, 1940
Creators: name: Rose, Arnold M. (Arnold Marshall), 1918-1968
Publisher: name: Columbia University
Year: 2019
Subjects: Race relations
African Americans--Social conditions
Endowments

description: Arnold M. Rose writes to Samuel A. Stouffer accepting an offer to join the research team of the Carnegie-Myrdal Study.
Spatial structure increases the waiting time for cancer
Creators: name: Martens, Erik A.
name: Kostadinov, R.
name: Maley, Carlo C.
name: Hallatschek, Oskar
Publisher: name: arXiv
Year: 2011
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Cancer results from a sequence of genetic and epigenetic changes which lead to a variety of abnormal phenotypes including increased proliferation and survival of somatic cells, and thus, to a selective advantage of pre-cancerous cells. The notion of cancer progression as an evolutionary process has been experiencing increasing interest in recent years. Many efforts have been made to better understand and predict the progression to cancer using mathematical models; these mostly consider the evolution of a well-mixed cell population, even though pre-cancerous cells often evolve in highly structured epithelial tissues. We propose a novel model of cancer progression that considers a spatially structured cell population where clones expand via adaptive waves. This model is used to asses two different paradigms of asexual evolution that have been suggested to delineate the process of cancer progression. The standard scenario of periodic selection assumes that driver mutations are accumulated strictly sequentially over time. However, when the mutation supply is sufficiently high, clones may arise simultaneously on distinct genetic backgrounds, and clonal adaptation waves interfere with each other. We find that in the presence of clonal interference, spatial structure increases the waiting time for cancer, leads to a patchwork structure of non-uniformly sized clones, decreases the survival probability of virtually neutral (passenger) mutations, and that genetic distance begins to increase over a characteristic length scale, determined here. These characteristic features of clonal interference may help to predict the onset of cancers with pronounced spatial structure and to interpret spatially-sampled genetic data obtained from biopsies. Our estimates suggest that clonal interference likely occurs in the progressing colon cancer, and possibly other cancers where spatial structure matters.
description: 21 pages
Modeling ²³⁰Th (and ²³¹Pa) : as an approach to study the intermediate and deep water circulation in the Arctic Ocean
Creators: name: Yu, Xiaoxin
Publisher: name: University of British Columbia
Year: 2017

description: Recently observed ²³⁰Th concentrations in 2007 and 2009 documented very high ²³⁰Th values within the Atlantic layer in the Canada Basin of the Arctic Ocean. Similar levels of high ²³⁰Th had only been previously observed in the Alpha Ridge region, implying that the Alpha Ridge is the potential source of the high ²³⁰Th waters. As the Alpha Ridge is downstream in the classic cyclonic circulation, that circulation is believed to have changed. Motivated by this, a three-dimensional Arctic ²³⁰Th model is configured for the first time to study such change. To simulate the tracer, I coupled a scavenging model, which describes the exchange of ²³⁰Th (and ²³¹Pa) between the dissolved and particulate phases, to an offline NEMO model (the Nucleus for European Modelling of the Ocean) that provides the advection and mixing processes that redistribute the tracers within the ocean. As the scavenging rates of such tracer elements are strongly affected by oceanic particle concentrations, the scavenging rates are parameterized as a function of ice concentration, which, to a great extent, influences the biological processes in the water. Model output produced an increase of ²³⁰Th concentration in the south Canada Basin. Sensitivity experiments confirm such change is not caused by a change in the particle field but a change in the intermediate circulation from cyclonic to anticyclonic throughout the Amerasian Basin. This shift in circulation is the reason for a subsequent transport of high ²³⁰Th concentration from the Alpha Ridge to the south Canada Basin. The model circulation and density fields suggest that the change in the flow is caused by increased dense water flux into the Arctic Ocean, primarily through the Barents Sea route. This increase of dense water inflow alters the density distribution in the Arctic and results in a quick adjustment in the Atlantic layer (~1 year) through propagation of boundary trapped internal Kelvin waves.
Quantum algorithm for simulating the dynamics of an open quantum system
Creators: name: Wang, Hefeng
name: Ashhab, S.
name: Nori, Franco
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In the study of open quantum systems, one typically obtains the decoherence dynamics by solving a master equation. The master equation is derived using knowledge of some basic properties of the system, the environment and their interaction: one basically needs to know the operators through which the system couples to the environment and the spectral density of the environment. For a large system, it could become prohibitively difficult to even write down the appropriate master equation, let alone solve it on a classical computer. In this paper, we present a quantum algorithm for simulating the dynamics of an open quantum system. On a quantum computer, the environment can be simulated using ancilla qubits with properly chosen single-qubit frequencies and with properly designed coupling to the system qubits. The parameters used in the simulation are easily derived from the parameters of the system+environment Hamiltonian. The algorithm is designed to simulate Markovian dynamics, but it can also be used to simulate non-Markovian dynamics provided that this dynamics can be obtained by embedding the system of interest into a larger system that obeys Markovian dynamics. We estimate the resource requirements for the algorithm. In particular, we show that for sufficiently slow decoherence a single ancilla qubit could be sufficient to represent the entire environment, in principle.
description: 5 figures, two tables
Aboriginal and Torres Strait Islander Health Workers and Practitioners and their role in cervical screening and self-collection in Australia
Creators: name: Zammit, Claire
name: Morseu-Diop, Aminata
name: Leha, Desiree
name: Briscoe, Karl
name: Dennis, Jodie
name: Butler, Tamara
name: BROTHERTON, JULIA
name: Cunningham, Joan
name: Garvey, Gail
name: Falzon, Kristine
name: Lawton, Beverley
name: SAVILLE, MARION
name: Taylor, Natalie
name: Whop, Lisa J
Publisher: name: The University of Melbourne
Year: 2025
Subjects: classificationCode: 450519
subject: Aboriginal and Torres Strait Islander perspectives
classificationCode: 450409
subject: Aboriginal and Torres Strait Islander health services
classificationCode: 420305
subject: Health and community services
classificationCode: 420312
subject: Implementation science and evaluation
classificationCode: 420602
subject: Health equity
classificationCode: 420605
subject: Preventative health care

description: Introduction: National Cervical Screening Program Guidelines suggest that Aboriginal and/or Torres Strait Islander health workers and practitioners could lead self-collection cervical screening (SC) delivery. Expanding the workforce offering screening is a priority in the National Cervical Cancer Elimination Strategy. To our knowledge, there has been no consultation with the Aboriginal and/or Torres Strait Islander health worker-practitioner workforce about their role in offering SC. We explored how Aboriginal and Torres Strait Islander health professionals want to be involved in delivering cervical screening and/or self-collection in the Australian National Cervical Screening Program.Methods: In partnership with the National Association of Aboriginal and Torres Strait Islander Health Workers and Practitioners (the peak community-controlled health workforce organisation), we undertook a cross-sectional survey to understand current and desired roles of the health worker-practitioner workforce and focus-group discussions with workforce members to explore how Aboriginal and Torres Strait Islander health worker/practitioner-led SC is currently or could work in practice,Results: 239 Aboriginal and Torres Strait Islander health workers (40%) or practitioners (60%) completed the survey with most respondents from NSW (38%) and QLD (30%). Most participants identified as women (91%), with both clinical and non-clinical responsibilities (46%), in primary care settings (62%). 85% of participants were aware of SC however only 15% had ever had any training on cervical screening. Primary care participants’ current roles were concentrated on health promotion with a resounding almost all participants (98%) wanting to offer SC within their scope of practice. We conducted 14 in-depth focus groups (n = 41 participants) and will present these data in greater depth in November 24.Conclusions: This research aligns with strategic directions of the National Workforce Plan for the Aboriginal and Torres Strait Islander Health Workforce and national elimination strategies and will create an evidence base for health worker/practitioner-led models of cancer screening.
The Galactic Center Massive Black Hole and Nuclear Star Cluster
Creators: name: Genzel, Reinhard
name: Eisenhauer, Frank
name: Gillessen, Stefan
Publisher: name: arXiv
Year: 2010
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The Galactic Center is an excellent laboratory for studying phenomena and physical processes that may be occurring in many other galactic nuclei. The Center of our Milky Way is by far the closest galactic nucleus, and observations with exquisite resolution and sensitivity cover 18 orders of magnitude in energy of electromagnetic radiation. Theoretical simulations have become increasingly more powerful in explaining these measurements. This review summarizes the recent progress in observational and theoretical work on the central parsec, with a strong emphasis on the current empirical evidence for a central massive black hole and on the processes in the surrounding dense nuclear star cluster. We present the current evidence, from the analysis of the orbits of more than two dozen stars and from the measurements of the size and motion of the central compact radio source, Sgr A*, that this radio source must be a massive black hole of about 4.4 \times 1e6 Msun, beyond any reasonable doubt. We report what is known about the structure and evolution of the dense nuclear star cluster surrounding this black hole, including the astounding fact that stars have been forming in the vicinity of Sgr A* recently, apparently with a top-heavy stellar mass function. We discuss a dense concentration of fainter stars centered in the immediate vicinity of the massive black hole, three of which have orbital peri-bothroi of less than one light day. This 'S-star cluster' appears to consist mainly of young early-type stars, in contrast to the predicted properties of an equilibrium 'stellar cusp' around a black hole. This constitutes a remarkable and presently not fully understood 'paradox of youth'. We also summarize what is known about the emission properties of the accreting gas onto Sgr A* and how this emission is beginning to delineate the physical properties in the hot accretion zone around the event horizon.
description: accepted by Rev.Mod.Phys. Aug 30, 2010
Differential rotation of main-sequence dwarfs and its dynamo-efficiency
Creators: name: Kitchatinov, L. L.
name: Olemskoy, S. V.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: A new version of a numerical model of stellar differential rotation based on mean-field hydrodynamics is presented and tested by computing the differential rotation of the Sun. The model is then applied to four individual stars including two moderate and two fast rotators to reproduce their observed differential rotation quite closely. A series of models for rapidly rotating ($P_{rot} = 1$ day) stars of different masses and compositions is generated. The effective temperature is found convenient to parameterize the differential rotation: variations with metallicity, that are quite pronounced when the differential rotation is considered as a function of the stellar mass, almost disappear in the dependence of differential rotation on temperature. The differential rotation increases steadily with surface temperature to exceed the largest differential rotation observed to date for the hottest F-stars we considered. This strong differential rotation is, however, found not to be efficient for dynamos when the efficiency is estimated with the standard $C_Ω$-parameter of dynamo models. On the contrary, the small differential rotation of M-stars is the most dynamo-efficient. The meridional flow near the bottom of the convection zone is not small compared to the flow at the top in all our computations. The flow is distributed over the entire convection zone in slow rotators but retreats to the convection zone boundaries with increasing rotation rate, to consist of two near-boundary jets in rapid rotators. The implications of the change of the flow structure for stellar dynamos are briefly discussed.
description: 9 pages, 11 figures, submitted to MNRAS