cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Dark matter halos in the multicomponent model. II. Density profiles of galactic halos
Creators: name: Todoroki, Keita
name: Medvedev, Mikhail V.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The multicomponent dark matter model with self-scattering and inter-conversions of species into one another is an alternative dark matter paradigm that is capable of resolving the long-standing problems of $Λ$CDM cosmology at small scales. In this paper, we have studied in detail the properties of dark matter halos with $M \sim 4-5 \times10^{11} M_{\odot}$ obtained in $N$-body cosmological simulations with the simplest two-component (2cDM) model. A large set of velocity-dependent cross-section prescriptions for elastic scattering and mass conversions, $σ_s(v)\propto v^{a_s}$ and $σ_c(v)\propto v^{a_c}$, has been explored and the results were compared with observational data. The results demonstrate that self-interactions with the cross-section per particle mass evaluated at $v=100$ km s$^{-1}$ being in the range of $0.01\lesssim σ_0/m\lesssim 1$ cm$^2$g$^{-1}$ robustly suppress central cusps, thus resolving the core-cusp problem. The core radii are controlled by the values of $σ_0/m$ and the DM cross-section's velocity-dependent power-law indices $(a_s,a_c)$, but are largely insensitive to the species' mass degeneracy. These values are in full agreement with those resolving the substructure and too-big-to-fail problems. We have also studied the evolution of halos in the 2cDM model with cosmic time.
description: 17 pages, 13 figures
Additional file 1: of Emotional intelligence among medical students: a mixed methods study from Chennai, India
Creators: name: Subashini Sundararajan
name: Vijayaprasad Gopichandran
Publisher: name: figshare
Year: 2018
Subjects: subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: Emotional intelligence among medical college students, questionnaire. This file provides the questionnaire used to assess the emotional intelligence of the medical college students. (DOCX 19Â kb)
Magnetized black hole as a gravitational lens
Creators: name: Konoplya, R. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We use the Ernst-Schwarzschild solution for a black hole immersed in a uniform magnetic field to estimate corrections to the bending angle and time delay due-to presence of weak magnetic fields in galaxies and between galaxies, and also due-to influence of strong magnetic field near supermassive black holes. The magnetic field creates a kind of confinement in space, that leads to increasing of the bending angle and time delay for a ray of light propagating in the equatorial plane.
description: 5 pages, 2 figures, to be published in Phys. Lett. B, references added
Practice Reloaded: A Statement, an Acknowledgment and a Comment
Creators: name: Bruni, Attila
Publisher: name: Sociologica
Year: 2019
Subjects: practice theory; science and technology studies; organization studies; power

description: This article is a comment to the Symposium on the Contamination of Practices. It starts by presenting a concise picture of the adoption of the idea of practice in Science & Technology Studies and Organization Studies and then it offers some remarks on several of the articles included in the Symposium.
description: Sociologica, Vol 13, No 3 (2019)
Noncovalent interactions that tune the reactivities of the flavins in bifurcating electron transferring flavoprotein
Creators: name: González-Viegas, María
name: Kar, Rajiv K.
name: Miller, Anne-Frances
name: Mroginski, Maria-Andrea
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: conformational change
subject: electron density
subject: electron transfer
subject: electron transfer flavoprotein
subject: electron bifurcation
subject: flavoprotein
subject: FAD
subject: hydrogen bond
subject: QM/MM
subject: redox tuning
subject: 500 Naturwissenschaften und Mathematik::530 Physik::539 Moderne Physik

description: Bifurcating electron transferring flavoproteins (Bf-ETFs) tune chemically identical flavins to two contrasting roles. To understand how, we used hybrid quantum mechanical molecular mechanical calculations to characterize noncovalent interactions applied to each flavin by the protein. Our computations replicated the differences between the reactivities of the flavins: the electron transferring flavin (ETflavin) was calculated to stabilize anionic semiquinone (ASQ) as needed to execute its single-electron transfers, whereas the Bf flavin (Bfflavin) was found to disfavor the ASQ state more than does free flavin and to be less susceptible to reduction. The stability of ETflavin ASQ was attributed in part to H-bond donation to the flavin O2 from a nearby His side chain, via comparison of models employing different tautomers of His. This H-bond between O2 and the ET site was uniquely strong in the ASQ state, whereas reduction of ETflavin to the anionic hydroquinone (AHQ) was associated with side chain reorientation, backbone displacement, and reorganization of its H-bond network including a Tyr from the other domain and subunit of the ETF. The Bf site was less responsive overall, but formation of the Bfflavin AHQ allowed a nearby Arg side chain to adopt an alternative rotamer that can H-bond to the Bfflavin O4. This would stabilize the anionic Bfflavin and rationalize effects of mutation at this position. Thus, our computations provide insights on states and conformations that have not been possible to characterize experimentally, offering explanations for observed residue conservation and raising possibilities that can now be tested.
Ultra High Energy Cosmic Rays
Creators: name: Protheroe, R. J.
name: Clay, R. W.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Cosmic rays with energies above $10^{18}$ eV are currently of considerable interest in astrophysics and are to be further studied in a number of projects which are either currently under construction or the subject of well-developed proposals. This paper aims to discuss some of the physics of such particles in terms of current knowledge and information from particle astrophysics at other energies.
description: 44 pages, 17 figures. Invited review, PASA, in press
MOESM1 of Nasal colonization with methicillin-resistant Staphylococcus aureus among elderly living in nursing homes in Brazil: risk factors and molecular epidemiology
Creators: name: Silveira, Monica
name: Cunha, Maria De
name: Souza, Camila
name: Correa, Adriana
name: Fortaleza, Carlos
Publisher: name: figshare
Year: 2018
Subjects: subject: Space Science
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Cancer
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: 60506 Virology
subject: Computational Biology

description: Additional file 1. Flow-chart of inclusion of subjects in the study.
Verifying cross-Kerr induced number squeezing: a case study
Creators: name: Schmid, David
name: Marshall, Kevin
name: James, Daniel F. V.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We analyze an experimental method for creating interesting nonclassical states by processing the entanglement generated when two large coherent states interact in a cross-Kerr medium. We specifically investigate the effects of loss and noise in every mode of the experiment, as well as the effect of "binning" the post-selection outcomes. Even with these imperfections, we find an optimal set of currently-achievable parameters which would allow a proof-of-principle demonstration of number squeezing in states with large mean photon number. We discuss other useful states which can be generated with the same experimental tools, including a class of states which contain coherent superpositions of differing photon numbers, e.g. good approximations to the state $\frac{1}{\sqrt{2}} (|0\rangle+|20\rangle)$. Finally, we suggest one possible application of this state in the field of optomechanics.
description: 8 pages, 7 figures
A Model for 'Double Notches' in Radio Pulsar Profiles
Creators: name: Wright, Geoffrey A. E.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Aberration and retardation of the radiation within a pulsar's magnetosphere enable a single corotating absorbing region in the outer magnetosphere to give rise to a 'double notch' in the pulsar's observed radio profile. This effect requires that a pulsar has not only absorbing but also emitting regions at heights which are a substantial proportion of the light cylinder radius. The known presence of double notches in the weak secondary emission of three nearby pulsars suggests that this emission comes from open field lines well above their poles and that an obscuring region extending over no more than 5 percent of the light cylinder radius is located at or near the light cylinder.
description: 10 pages, 4 figures, Published in MNRAS. See also astro-ph/0311467
Decoherence of a Pointer by a Gas Reservoir
Creators: name: Kleckner, Michael
name: Ron, Amiram
Publisher: name: arXiv
Year: 2000
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the effect of the environment on the process of the measurement of a state of a microscopic spin half system. The measuring apparatus is a heavy particle, whose center of mass coordinates can be considered at the end of the measurement as approximately classical, and thus can be used as a pointer. The state of the pointer, which is the result of its interaction with the spin, is transformed into a mixed state by the coupling of the pointer to the environment. The environment is considered to be a gas reservoir, whose particles interact with the pointer. This results in a Fokker-Planck equation for the reduced density matrix of the pointer. The solution of the equation shows that the quantum coherences, which are characteristic to the entangled state between the probabilities to find the pointer in one of two positions, decays exponentially fast in time. We calculate the exponential decay function of this decoherence effect, and express it in terms of the parameters of the model.
description: 41 pages, 1 figure
Dark Enactments in Milan: A Practice-Centred Exploration of an Italian Post-Punk Subculture of the ‘80s
Creators: name: Tosoni, Simone
Publisher: name: Sociologica
Year: 2019
Subjects: Subcultures; Post-subcultures; Enactment; Social Practices; Post-punk

description: The present paper intends to propose a methodological framework inspired by second generation practice theories and by John Law's concept of enactment for the study of subcultures related to music and style, as a way to circumvent the frontal contraposition between subculturalist and post subculturalist approaches that characterize the field. Addressing the case of goth (or dark, as the subculture is known in Italy) in Milan in the 1980s, the paper shows how the subculture was not internally homogeneous, but also how its internal variations did not simply depend on personal interpretations. In Milan, in fact, it was possible to observe different and stabilized ways of enacting dark, depending on the bundle of practices in which subcultural participation unfolded: the activist enactment, the music club enactment, and the loner enactment. The three enactments shared the same canon of subcultural resources (music, style, literature, cinema, figurative arts, and others), and yet they differed for relevant aspects as stance to political engagement, forms of socialization, relationship with urban public space, and ultimately forms of identity construction.
description: Sociologica, Vol 13, No 3 (2019)
Quantum interferometric optical lithography:towards arbitrary two-dimensional patterns
Creators: name: Kok, Pieter
name: Boto, Agedi N.
name: Abrams, Daniel S.
name: Williams, Colin P.
name: Braunstein, Samuel L.
name: Dowling, Jonathan P.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: As demonstrated by Boto et al. [Phys. Rev. Lett. 85, 2733 (2000)], quantum lithography offers an increase in resolution below the diffraction limit. Here, we generalize this procedure in order to create patterns in one and two dimensions. This renders quantum lithography a potentially useful tool in nanotechnology.
description: 9 pages, 5 figures Revtex
The Sociomateriality of Cooking. The Practice Turn in Contemporary Food Studies
Creators: name: Domaneschi, Lorenzo
Publisher: name: Sociologica
Year: 2019
Subjects: Practice theory; Sociology of food; Culinary culture; Sociomateriality; Habitus; Ethnography; Symbolic power

description: The paper present the so-called “practice turn in contemporary theory” and its possible and profitable sociological application to the field of food studies. Starting from the epistemological perspective that sees the concept of practice as the ongoing arrangement resulting from the social organization between different elements, I present a brief critical review of the research works about food culture that has drawn on a practice-based approach, in order to show how it affords to move from a “sociology of food” to a “sociology of food social practices”. Then, I discuss one particular approach offered by theories of practice, based on the category of “sociomateriality”. Finally, I briefly introduce, by way of example, the empirical analysis of the practice of professional cooking to show the potentiality of this approach. In conclusion, I will discuss the strengths and the vulnerabilities related to the analysis of food social practices, focusing in particular on the issue of symbolic power.
description: Sociologica, Vol 13, No 3 (2019)
Stability of an active longitude of the giant PZ Mon
Creators: name: Pakhomov, Yu. V.
name: Antonyuk, K. A.
name: Bondar', N. I.
name: Pit, N. V.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Analysis of photometric data of the active giant PZ Mon is presented. Using ASAS-3 project data and new more accurate photometry we establish that during 15 years of PZ Mon CCD observations the light curve remains stable, and consequently a longitude of the active spotted area is stable. The small deviations may be explained by differential rotation or inhomogeneous distribution of spots on the active hemisphere of PZ Mon. The stability of the active longitude and it's location on the PZ Mon surface indicates on the secondary component as reason of stellar activity.
description: 4 pages, 3 figures, International Astronomy Conference "Stars: from collapse to collapse"
MOESM1 of Ethanol production potential from AFEX™ and steam-exploded sugarcane residues for sugarcane biorefineries
Creators: name: Thapelo Mokomele
name: Sousa, Leonardo Da Costa
name: Balan, Venkatesh
name: Eugéne Rensburg
name: Dale, Bruce
name: Görgens, Johann
Publisher: name: figshare
Year: 2018
Subjects: subject: Space Science
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: Inorganic Chemistry

description: Additional file 1: Table S1. Composition of the liquid and solid fractions after water-impregnated steam explosion of sugarcane bagasse, cane leaf matter and a bagasse-CLM mixture (at 1:1 w/w ratio).
Structural Equations and Analysis of Dispositions
Creators: name: Friend, Toby
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: Structural Equations
subject: Analysis
subject: Dispositions
subject: 100 Philosophie und Psychologie::100 Philosophie::102 Verschiedenes

description: I develop a new schema for analysis of dispositions in terms of structural equations. This schema provides the means to respond to a host of problems that have been posed for other proposals, including the problem of masks, alters, mimickers, tricks, conjunctive multi-track dispositions and dispositional degrees. In the development of this new schema, I will employ structural modelling techniques to highlight features of the problem cases, thereby revealing the utility of these techniques to ongoing discussion.
Additional file 1 of Metagenomics of gut microbiome for migratory seagulls in Kunming city revealed the potential public risk to human health
Creators: name: Liao, Feng
name: Qian, Jing
name: Yang, Ruian
name: Gu, Wenpeng
name: Li, Rufang
name: Yang, Tingting
name: Fu, Xiaoqing
name: Yuan, Bing
name: Zhang, Yunhui
Publisher: name: figshare
Year: 2023
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics

description: Additional file 1.
report.pdf
Creators: name: Kumar, Ayush
name: Singh, Honey
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 401406
subject: Machining

description: We present the training and validation dataset to be utilized in the Capsule Vision 2024 Challenge: Multi-Class Abnormality Classification for Video Capsule Endoscopy. This challenge is being virtually organized by the Research Center for Medical Image Analysis and Artificial Intelligence (MIAAI), Department of Medicine, Danube Private University, Krems, Austria, and the Medical Imaging and Signal Analysis Hub (MISAHUB) in collaboration with the 9th International Conference on Computer Vision Image Processing (CVIP 2024) organized by the Indian Institute of Information Technology, Design and Manufacturing (IIITDM) Kancheepuram, Chennai, India.
title: Pnina Werbner
title: An Obituary
titleType: Subtitle
Creators: name: Liebelt, Claudia
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: Pnina Werbner
subject: social anthropologist
subject: anthropology
subject: 300 Sozialwissenschaften::300 Sozialwissenschaften, Soziologie::301 Soziologie, Anthropologie

description: Pnina Werbner was a British social anthropologist, a brilliant thinker and an engaged intellectual renowned for her prolific contributions to debates on Sufi Islam, multiculturalism and diaspora, as well as urban and legal anthropology. In January 2023, she died unexpectedly during a holiday with her husband, the anthropologist Richard Werbner.
Additional file 2 of Metagenomics of gut microbiome for migratory seagulls in Kunming city revealed the potential public risk to human health
Creators: name: Liao, Feng
name: Qian, Jing
name: Yang, Ruian
name: Gu, Wenpeng
name: Li, Rufang
name: Yang, Tingting
name: Fu, Xiaoqing
name: Yuan, Bing
name: Zhang, Yunhui
Publisher: name: figshare
Year: 2023
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics

description: Additional file 2.
Warrior Women: Indigenous Women, Gender Relations, and Sexual Politics within the American Indian Movement and at Wounded Knee
Creators: name: Voigt, Matthias André
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: American Indian Movement
subject: Indigenous Women
subject: Gender Relations
subject: Sexual Politics
subject: 900 Geschichte und Geografie::970 Geschichte Nordamerikas::973 Geschichte der USA

description: The main purpose of this article is to describe and analyze Indigenous women’sparticipation in the prolonged takeover of Wounded Knee in 1973. Indigenouswomen’s grassroots activism was fundamental for sustaining and keeping the occu-pation alive, yet their contributions were largely eclipsed by the actions of theirmedia-savvy, male comrades-in-arms. What is more important, Indigenous women inthe American Indian Movement (AIM) frequently claimed that they were in a state of“double oppression” or “double colonization”—first, through colonial domination andracial inequality, and second, through male privilege and female subordination—itself,part of the legacy of colonization and the imposition of dominant white patriarchalmasculinity.2 Nationalist struggles such as that of the anticolonial AIM tend to repli-cate the very structures of male dominance that they struggle against. While womenhave been included in public discourse, they have been largely left out of politicaldecision-making.3 At Wounded Knee, Indigenous women took on a series of interrelated roles andresponsibilities that kept the occupation alive. Indigenous women skillfully renegoti-ated their gendered position of power within the masculinist organization, constructingfemininities that shifted between domesticated motherhood and female comrades-in-arms. In so doing, they both reaffirmed and challenged sexist and chauvinist attitudes within AIM. They were well known as long-standing community organizers, andtheir active participation at the Wounded Knee takeover was an indication of female empowerment.
Cycles of Dispositions–Unfoldings. A Retro-ANT View of Practices
Creators: name: Mattozzi, Alvise
Publisher: name: Sociologica
Year: 2019
Subjects: Actor-Network Theory; Actualization; Design; Script; Structuralism; Virtuality

description: The present contribution intends to probe a view of practices as cycles of disposition and unfoldings or, which is the same, of virtualities and actualizations, and to show how such view allows not only to take artifacts into account, but also to account for their contribution to the unfolding of practices. A specific practice, related to squeezing oranges in a sink by using Juicy Salif, the (in)famous Philippe Starck’s squeezer, is exploited as empirical ground for exemplification. In order to probe the proposed view of practices as cycles of disposition and unfoldings, the present contribution engages in an epistemological and in a methodological reflection. On the one hand, it investigates the role of dispositions-virtualities in past and present approaches to practices. On the other, it recovers the disused Actor-Network Theory’s notion of “script” as a way to describe-analyze artifacts’ dispositions or virtualities and thus accounting for their contribution to practices. In the end, the paper, by investigating the role of dispositions-virtualities, recovers the structuralist legacy to the reflection on practices, showing how Actor-Network Theory can be considered a “distributed structuralism”.
description: Sociologica, Vol 13, No 3 (2019)
title: Dry Pipes: Associations between Utility Performance and Intermittent Piped Water Supply in Low and Middle Income Countries
Creators: name: Kaminsky, Jessica
name: Kumpel, Emily
Publisher: name: University of Massachusetts Amherst
Year: 2018
Subjects: subject: intermittent water supply
subject: water distribution systems
subject: utility benchmarking
subject: utility performance

description: Abstract Intermittent piped water supply impacts at least one billion people around the globe. Given the environmental and public health implications of poor water supply, there is a strong practical need to understand how and why intermittent supply occurs, and what strategies may be used to move utilities towards the provision of continuous water supply. Leveraging data from the International Benchmarking Network for Water and Sanitation Utilities, we discover 42 variables that have statistically significant associations with intermittent water supply at the utility scale across 2115 utilities. We categorized these under the following themes: Physical infrastructure system scale, coverage, consumer type, public water points, financial, and non-revenue water and metering. This research identifies globally relevant factors with high potential for cross-context, scaled impact. In addition, using insights from the analysis, we provide empirically grounded recommendations and data needs for improved global indicators of utility performance related to intermittent supply.
QED and QCD self-energy corrections through the loop-tree duality
Creators: name: Ramírez-Uribe, N. Selomit
name: Hernández-Pinto, Roger J.
name: Rodrigo, Germán
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The loop-tree duality (LTD) theorem establishes that loop contributions to scattering amplitudes can be computed through dual integrals, which are build from single cuts of the virtual diagrams. In order to build a complete LTD representation of a cross section and to achieve a local cancellation of singularities, it is crucial to include the renormalized self-energy corrections in an unintegrated form. In this document, we calculate the scalar functions related to the self-energy corrections in QED and QCD in the LTD formalism and extract explicitly their UV behaviour.
description: 9 pages, 1 figure. To be published in Journal of Physics Conference Series (IOP). Joint Proceedings of the XXXI Annual Meeting of the Division of Particles and Fields of the Mexican Physical Society
Additional file 3 of Metagenomics of gut microbiome for migratory seagulls in Kunming city revealed the potential public risk to human health
Creators: name: Liao, Feng
name: Qian, Jing
name: Yang, Ruian
name: Gu, Wenpeng
name: Li, Rufang
name: Yang, Tingting
name: Fu, Xiaoqing
name: Yuan, Bing
name: Zhang, Yunhui
Publisher: name: figshare
Year: 2023
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics

description: Additional file 3.
A Maximally Symmetric Vector Propagator
Creators: name: Tsamis, N. C.
name: Woodard, R. P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We derive the propagator for a massive vector field on a de Sitter background of arbitrary dimension. This propagator is de Sitter invariant and possesses the proper flat spacetime and massless limits. Moreover, the retarded Green's function inferred from it produces the correct classical response to a test source. Our result is expressed in a tensor basis which is convenient for performing quantum field theory computations using dimensional regularization.
description: 21 pages, no figures, uses LaTeX 2 epsilon, version 2 has an error in eqn (86) corrected and an updated reference list
Modelling Practice: The Inertia of Body Ideals in the Fashion System
Creators: name: Volonté, Paolo
Publisher: name: Sociologica
Year: 2019
Subjects: Practice; Fashion; Fashion modelling; Thin ideal; Inertia; Cultural intermediaries

description: This article addresses practice-based theories with the goal to show that they can contribute substantially to the understanding of fashion modelling and, consequently, of the social phenomenon of fashion in general. Fashion modelling is a key component of the fashion system, and fashion models contribute to the innovation of the clothing landscape in contemporary Western societies much more than assumed by common sense. Yet, some features of fashion modelling, such as the incorporation of the thin ideal and the affected gait of the models’ walking on the catwalk, are puzzling if understood in the light of traditional sociological categories. If studied with the conceptual tools displayed by the practice approach, they appear as striking manifestations of the inertia that bodies, materials, routines, skills and meanings of the practice of fashion impose on its participants.
description: Sociologica, Vol 13, No 3 (2019)
Schrödinger cat state of trapped ions in harmonic and anharmonic oscillator traps
Creators: name: Sharma, S. Shelly
name: Sharma, N. K.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Quantum Physics (quant-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We examine the time evolution of a two level ion interacting with a light field in harmonic oscillator trap and in a trap with anharmonicities. The anharmonicities of the trap are quantified in terms of the deformation parameter $τ$ characterizing the q-analog of the harmonic oscillator trap. Initially the ion is prepared in a Schrödinger cat state. The entanglement of the center of mass motional states and the internal degrees of freedom of the ion results in characteristic collapse and revival pattern. We calculate numerically the population inversion I(t), quasi-probabilities $Q(t),$ and partial mutual quantum entropy S(P), for the system as a function of time. Interestingly, small deformations of the trap enhance the contrast between population inversion collapse and revival peaks as compared to the zero deformation case. For β=3 and $4,(% β$ determines the average number of trap quanta linked to center of mass motion) the best collapse and revival sequence is obtained for τ=0.0047 and τ=0.004 respectively. For large values of τdecoherence sets in accompanied by loss of amplitude of population inversion and for τ\sim 0.1 the collapse and revival phenomenon disappear. Each collapse or revival of population inversion is characterized by a peak in S(P) versus t plot. During the transition from collapse to revival and vice-versa we have minimum mutual entropy value that is S(P)=0. Successive revival peaks show a lowering of the local maximum point indicating a dissipative irreversible change in the ionic state. Improved definition of collapse and revival pattern as the anharminicity of the trapping potential increases is also reflected in the Quasi- probability versus t plots.
description: Revised version, 16 pages,6 figures. Revtex
Applied Research Note: Survival of Escherichia coli and temperature development during composting of chicken manure with a typically low carbon/nitrogen ratio and moisture content
Creators: name: Thomas, C.
name: Idler, C.
name: Ammon, C.
name: Amon, Thomas
Publisher: name: Freie Universität Berlin
Year: 2024
Subjects: subject: chicken manure
subject: composting
subject: Escherichia coli
subject: inactivation
subject: temperature development
subject: 600 Technik, Medizin, angewandte Wissenschaften::630 Landwirtschaft::630 Landwirtschaft und verwandte Bereiche

description: The presence of pathogens, e.g., Escherichia coli (E. coli), in chicken manure can potentially lead to serious infections and foodborne diseases when spread on land as organic fertilizer. Therefore, it is essential to inactivate these bacteria before land application. The aim of the present study was to determine the survival of E. coli and the temperature development in compost piles during composting of chicken manure with a typically low carbon/nitrogen (C/N) ratio and moisture content (MC). In a summer and winter trial, chicken manure piles were stacked in 1) uncovered static piles, 2) covered static piles, and 3) periodically turned piles. Samples were inoculated with a nonpathogenic E. coli strain at levels of 107 cfu/g and placed at subsurface and center locations of the piles. Within 24 h, E. coli were undetectable by direct count in all piles and at all sample locations. By d 28, all samples were also negative for E. coli by enrichment. Despite the suboptimal composting conditions with an initial C/N ratio of 10:1 and an MC below 40%, temperatures within all piles mainly exceeded 50°C within the first 24 h. Statistical analyses showed that the sample location and the total hours at temperatures ≥50 and 55°C in the piles had significant influences on the survival of E. coli in the chicken manure compost. The season and manure treatment method had no significant effects on the presence of E. coli.
Practice Theories and the "Circuit of Culture": Integrating Approaches for Studying Material Culture
Creators: name: Mora, Emanuela
name: Noia, Eleonora
name: Turrini, Valentina
Publisher: name: Sociologica
Year: 2019
Subjects: Material culture; Circuit of culture; Practice theory; Haptic interfaces; Farmer agriculture

description: The paper compares two heuristic tools to understand how practice theory could be used to study the phenomena of material culture: the one summarized by Shove et Al. (2012) in The Dynamics of Social Practice: Everyday Life and How It Changes and the “circuit of culture” proposed by Paul Du Gay et Al. in Doing Cultural Studies. The Case of the Sony Walkman (1997). The aim of the article is to test the possibility to integrate the use of these two tools. In order to fulfil this purpose, the article is comprised of two parts. The first part illustrates how the two heuristic tools are compatible and what advantages each have over the other. In the second part, both heuristic tools will be applied to explore two case studies, one regarding a technological artefact and another one regarding a type of agricultural practice.
description: Sociologica, Vol 13, No 3 (2019)
Cosmological Models of Universe with Variable Deceleration Parameter in Lyra's Manifold
Creators: name: Pradhan, A.
name: Shahi, J. P.
name: Singh, C. B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: FRW models of the universe have been studied in the cosmological theory based on Lyra's manifold. A new class of exact solutions has been obtained by considering a time dependent displacement field for variable deceleration parameter from which three models of the universe are derived (i) exponential (ii) polynomial and (iii) sinusoidal form respectively. The behaviour of these models of the universe are also discussed. Finally some possibilities of further problems and their investigations have been pointed out.
description: 11 pages, 3 figures. To appear in Braz. J. Phys
Aplicação da Design Sprint para Fins Educacionais: Um Estudo de Caso no Instituto Federal de Goiás
Creators: name: Vinícius Gomes Ferreira
Publisher: name: figshare
Year: 2018
Subjects: subject: 80309 Software Engineering
subject: FOS: Computer and information sciences

description: Artigo final sobre design sprint
Effect of peas and pea products in diets for broiler chickens with consideration of the intestinal microbiota
Creators: name: Kirn, A. I.
name: Vahjen, Wilfried
name: Weindl, P. A.
name: Hofmann, P.
name: Zentek, Jürgen
name: Bellof, G.
Publisher: name: Freie Universität Berlin
Year: 2024
Subjects: subject: pea
subject: pea protein concentrate
subject: pea hull
subject: broiler
subject: intestinal microbiota
subject: 16S-sequencing
subject: short-chain fatty acids
subject: 600 Technik, Medizin, angewandte Wissenschaften::630 Landwirtschaft::630 Landwirtschaft und verwandte Bereiche

description: In addition to the whole white-flowered pea, pea protein concentrates and pea hulls can be utilized in animal nutrition. In particular, fermentable carbohydrates and fibers in peas and pea products seem to contribute to intestinal health and health maintenance in poultry, due to their prebiotic effect on the intestinal microbiota. This study was conducted to investigate the effect of different proportions of peas (P), pea protein concentrate (PPC) and pea hulls (PH) in complete feed mixtures for broilers on growth and slaughter performance as well as intestinal microbiota. Twenty diets with varying proportions of peas and pea products were fed to male broilers from d 1 to 34. Short-chain fatty acid analysis and 16S sequencing were used to examine the ileal and cecal microbiota for selected feeding groups. Overall, the attained fattening performances were at a high level. The use of peas and pea products did not affect body weight on d 34 or slaughter performance. The use of pea hulls up to 6% resulted in the highest overall feed intake and overall feed conversion ratio (P < 0.001). Microbiota composition and ileal bacterial metabolites were unchanged. Microbiota changes in the cecum were found between dietary treatments for several subdominant microbial genera that preferentially ferment carbohydrates. This study has shown that peas and pea products are well-suited as feedstuffs for feeding broilers when used appropriately. Furthermore, the intestinal microbiota responded with an increased abundance of nonpathogenic genera that may help maintain intestinal microbial homeostasis.
Hyperon softening of the EOS of dense matter and the spin evolution of isolated neutron stars
Creators: name: Zdunik, J. L.
name: Haensel, P.
name: Gourgoulhon, E.
name: Bejger, M.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The effect of the hyperon softening of the equation of state (EOS) of dense matter on the spin evolution of isolated neutron stars is studied for a broad set of hyperonic EOSs. We use a multidomain 2-D code based on a spectral method, and show how important the precision of solving the equations of stationary motion is for the stability analysis. For some EOSs, the hyperon softening leads to spin-up by the angular momentum loss, in the form of the back bending phenomenon, for a rather broad range of stellar baryon mass. We show that large segments of the evolutionary tracks exhibiting the back bending behaviour in the moment-of-inertia - rotation-frequency plane, are actually unstable and therefore not astrophysically relevant. We show also that during the spin-up - angular-momentum-loss epoch, an isolated neutron star (e.g., a radio pulsar) can lose a sizable part of its initial angular momentum without significantly changing its rotation period. We propose also simple arguments and criteria allowing to connect the presence of a back bending epoch with the mass-radius relations and the stiffness and/or softness of the nucleon and hyperon EOSs of the neutron star core.
description: 11 pages, 13 figures. Accepted for publication in A&A
Stabilization of test particles in Induced Matter Kaluza-Klein theory
Creators: name: Jalalzadeh, S.
name: Vakili, B.
name: Ahmadi, F.
name: Sepangi, H. R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The stability conditions for the motion of classical test particles in an $% n $-dimensional Induced Matter Kaluza-Klein theory is studied. We show that stabilization requires a variance of the strong energy condition for the induced matter to hold and that it is related to the hierarchy problem. Stabilization of test particles in a FRW universe is also discussed.
description: 15 pages, 1 figure, to appear in Class. Quantum Grav
The fuzzy Henstock-Kurzweil delta integral on time scales
Creators: name: Zhao, Dafang
name: Ye, Guoju
name: Liu, Wei
name: Torres, Delfim F. M.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 26A42, 26E50, 26E70

description: We investigate properties of the fuzzy Henstock-Kurzweil delta integral (shortly, FHK $Δ$-integral) on time scales, and obtain two necessary and sufficient conditions for FHK $Δ$-integrability. The concept of uniformly FHK $Δ$-integrability is introduced. Under this concept, we obtain a uniformly integrability convergence theorem. Finally, we prove monotone and dominated convergence theorems for the FHK $Δ$-integral.
description: This is a preprint of a paper whose final and definite form will appear in 'Springer Proceedings in Mathematics and Statistics', ISSN: 2194-1009. Submitted 30-July-2017; accepted 29-Nov-2017
Selecting molecules in the vibrational and rotational ground state by deflection
Creators: name: Domokos, P.
name: Kiss, T.
name: Janszky, J.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A beam of diatomic molecules scattered off a standing wave laser mode splits according to the rovibrational quantum state of the molecules. Our numerical calculation shows that single state resolution can be achieved by properly tuned, monochromatic light. The proposed scheme allows for selecting non-vibrating and non-rotating molecules from a thermal beam, implementing a laser Maxwell's demon to prepare a rovibrationally cold molecular ensemble.
description: 11 pages, LaTeX. To appear in the European Physical Journal D
Experimental study of optimal measurements for quantum state tomography
Creators: name: Sosa-Martinez, H.
name: Lysne, N. K.
name: Baldwin, C. H.
name: Kalev, A.
name: Deutsch, I. H.
name: Jessen, P. S.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Quantum tomography is a critically important tool to evaluate quantum hardware, making it essential to develop optimized measurement strategies that are both accurate and efficient. We compare a variety of strategies using nearly pure test states. Those that are informationally complete for all states are found to be accurate and reliable even in the presence of errors in the measurements themselves, while those designed to be complete only for pure states are far more efficient but highly sensitive to such errors. Our results highlight the unavoidable tradeoffs inherent to quantum tomography.
description: 5 pages, 3 figures
Molecular phylogenetics and morphology reveal the Plettkea lineage including several members of Arenaria and Pycnophyllopsis to be a clade of 21 South American species nested within Stellaria (Caryophyllaceae, Alsineae)
Creators: name: Montesinos-Tubée, Daniel B.
name: Borsch, Thomas
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: Bolivia
subject: molecular phylogeny
subject: new species
subject: Peru
subject: Plettkea
subject: Pycnophyllopsis
subject: South America
subject: Stellaria
subject: 500 Naturwissenschaften und Mathematik::580 Pflanzen (Botanik)::580 Pflanzen (Botanik)

description: Caryophyllaceae with a cushion-like life form occur with a large number of species at the higher altitudes of the Andes (3500–5000 m) and have evolved convergently in several different lineages. Based on molecular phylogenetic analysis it is shown that members of the former genera Plettkea and Pycnophyllopsis, but also certain species previously classified as Arenaria constitute a subclade nested within the monophyletic genus Stellaria. Both plastid (trnK-matK-psbA + trnL-F) and nuclear (nrITS) trees converged on such a highly supported ‘Plettkea’ clade. Morphologically, the members of the ‘Plettkea’ subclade of Stellaria are further characterized by reduced to completely absent petals and seeds with a more or less conspicuous tuberculate testa. This clade is described as S. sect. Plettkea (Mattf.) Montesinos & Borsch. Species-level relationships within S. sect. Plettkea are also congruently inferred by plastid and nuclear genomic compartments, with three further sublineages recognized: Altogether, our detailed taxonomic revision showed that the ‘Plettkea’ clade in fact constitutes an Andean radiation of 21 species within Stellaria, four of which are described as new to science. Earlier treatments indicated just a few species with a putative placement. The results of this investigation underscore the importance of fieldwork and integrated molecular-morphological approaches to assess the species diversity in Andean plant groups. In addition to the phylogenetic analysis, we provide a taxonomic backbone including all names and types, descriptions and information on distribution and ecology and a key for identification. Regarding the next relatives of the S. sect. Plettkea clade, our plastid trees depict the ‘Nitentes’ clade of Stellaria as sister, whereas nrITS instead suggests a sister group relationship of the ‘Nitentes’ with the speciose ‘Larbreae’ clade. Our inferred relationships of major clades further deviate from published molecular trees by indicating an early branching position of the ‘Petiolares’ clade.
Solar activity forcing of terrestrial hydrological phenomena
Creators: name: Mauas, P. J. D.
name: Buccino, A. P.
name: Flamenco, E.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: Recently, the study of the influence of solar activity on the Earth's climate received strong attention, mainly due to the possibility, proposed by several authors, that global warming is not anthropogenic, but is due to an increase in solar activity. Although this possibility has been ruled out, there are strong evidences that solar variability has an influence on Earth's climate, in regional scales. Here we review some of these evidences, focusing in a particular aspect of climate: atmospheric moisture and related quantities like precipitation. In particular, we studied the influence of activity on South American precipitations during centuries. First, we analyzed the stream flow of the Paraná and other rivers of the region, and found a very strong correlation with Sunspot Number in decadal time scales. We found a similar correlation between Sunspot Number and tree-ring chronologies, which allows us to extend our study to cover the last two centuries.
description: Living around Active Stars Proceedings IAU Symposium, 12 pages
Responsible Data Management and Ethical Sharing in Context: Available resources and campus support
Creators: name: Curty, Renata Gonçalves
Publisher: name: Zenodo
Year: 2024
Subjects: data ethics
data publication
data sharing
social sciences
sensitive data
data availability
restricted data
data documentation

description: Presentation for faculty and graduate students from the Anthropology Department at UCSB as part of the Data Ethics Seminar (Feb. 2024).
Constraining f(R) theories with the energy conditions
Creators: name: Bergliaffa, Santiago Esteban Perez
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A new method to constrain gravitational theories depending on the Ricci scalar is presented. It is based on the weak energy condition and yields limits on the parameters of a given theory through the current values of the derivatives of the scale factor of the Friedmann-Robertson-Walker geometry. A further constraint depending on the current value of the snap is also given. Actual constraints (and the corresponding error propagation analysis) are calculated for two examples, which show that the method is useful in limiting the possible $f(R)$ theories.
description: 4 pages, 3 figures
Research Projects (2018) - Oliver Maclaren
Creators: name: OJ Maclaren
Publisher: name: figshare
Year: 2018
Subjects: subject: 91305 Energy Generation, Conversion and Storage Engineering
subject: FOS: Mechanical engineering
subject: 10299 Applied Mathematics not elsewhere classified
subject: FOS: Mathematics
subject: 19999 Mathematical Sciences not elsewhere classified

description: Short presentation on my research interests, aimed at potential postgraduate (PhD or Masters) students.