cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Transport of First Rocks of The Solar System by X-winds
Creators: name: Hu, Renyu
Publisher: name: arXiv
Year: 2010
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: It has been suggested that chondrules and calcium-aluminum-rich inclusions (CAIs) were formed at the inner edge of the protoplanetary disk and then entrained in magnetocentrifugal X-winds. We study trajectories of such solid bodies with the consideration of the central star gravity, the protoplanetary disk gravity, and the gas drag of the wind. The efficiency of the gas drag depends on a parameter $η$, which is the product of the solid body size and density. We find that the gravity of the protoplanetary disk has a non-negligible effect on the trajectories. If a solid body re-enters the flared disk, the re-entering radius depends on the stellar magnetic dipole moment, the disk's gravity, the parameter $η$, and the initial launching angle. The disk's gravity can make the re-entering radius lower by up to 30%. We find a threshold $η$, denoted as $η_t$, for any particular configuration of the X-wind, below which the solid bodies will be expelled from the planetary system. $η_t$ sensitively depends on the initial launching angle, and also depends on the mass of the disk. Only the solid bodies with a $η$ larger than but very close to $η_t$ can be launched to a re-entering radius larger than 1 AU. This size-sorting effect may explain why chondrules come with a narrow range of sizes within each chondritic class. In general, the size distributions of CAIs and chondrules in chondrites can be determined from the initial size distribution as well as the distribution over the initial launching angle.
description: Accepted for publication in ApJ
Flow of emotional messages in artificial social networks
Creators: name: Chmiel, Anna
name: Holyst, Janusz A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Models of message flows in an artificial group of users communicating via the Internet are introduced and investigated using numerical simulations. We assumed that messages possess an emotional character with a positive valence and that the willingness to send the next affective message to a given person increases with the number of messages received from this person. As a result, the weights of links between group members evolve over time. Memory effects are introduced, taking into account that the preferential selection of message receivers depends on the communication intensity during the recent period only. We also model the phenomenon of secondary social sharing when the reception of an emotional e-mail triggers the distribution of several emotional e-mails to other people.
description: 10 pages, 7 figures, submitted to International Journal of Modern Physics C
The cooling phase of Type-I X-ray bursts in 4U 1636-53
Creators: name: Zhang, Guobao
name: Mendez, Mariano
name: Altamirano, Diego
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Time-resolved spectra during the cooling phase of thermonuclear X-ray bursts in low-mass X-ray binaries (LMXBs) can be used to measure the radii and masses of neutron stars. We analyzed ~ 300 bursts of the LMXB 4U 1636-53 using data from the Rossi X-ray Timing Explorer. We divided the bursts in three groups, photospheric radius expansion (PRE), hard non-PRE and soft non-PRE bursts, based on the properties of the bursts and the state of the source at the time of the burst. For the three types of bursts, we found that the average relation between the bolometric flux and the temperature during the cooling phase of the bursts is significantly different from the canonical $F \propto T^4$ relation that is expected if the apparent emitting area on the surface of the neutron star remains constant as the flux decreases during the decay of the bursts. We also found that a single power law cannot fit the average flux-temperature relation for any of the three types of bursts, and that the flux-temperature relation for the three types of bursts is significantly different. Finally, for the three types of bursts, the temperature distribution at different flux levels during the decay of the bursts is significantly different. From the above we conclude that hard non-PRE bursts ignite in a hydrogen-rich atmosphere, whereas for soft non-PRE and PRE bursts the fuel is helium-rich. We further conclude that the metal abundance in the neutron star atmosphere decreases as the bursts decay, probably because the heavy elements sink faster in the atmosphere than H and He.
description: 10 pages, 22 figures, submitted to MNRAS
A theory of $L^1$-dissipative solvers for scalar conservation laws with discontinuous flux
Creators: name: Andreianov, Boris
name: Karlsen, Kenneth H.
name: Risebro, Nils Henrik
Publisher: name: arXiv
Year: 2010
Subjects: subject: Analysis of PDEs (math.AP)
subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: We propose a general framework for the study of $L^1$ contractive semigroups of solutions to conservation laws with discontinuous flux. Developing the ideas of a number of preceding works we claim that the whole admissibility issue is reduced to the selection of a family of "elementary solutions", which are certain piecewise constant stationary weak solutions. We refer to such a family as a "germ". It is well known that (CL) admits many different $L^1$ contractive semigroups, some of which reflects different physical applications. We revisit a number of the existing admissibility (or entropy) conditions and identify the germs that underly these conditions. We devote specific attention to the anishing viscosity" germ, which is a way to express the "$Γ$-condition" of Diehl. For any given germ, we formulate "germ-based" admissibility conditions in the form of a trace condition on the flux discontinuity line $x=0$ (in the spirit of Vol'pert) and in the form of a family of global entropy inequalities (following Kruzhkov and Carrillo). We characterize those germs that lead to the $L^1$-contraction property for the associated admissible solutions. Our approach offers a streamlined and unifying perspective on many of the known entropy conditions, making it possible to recover earlier uniqueness results under weaker conditions than before, and to provide new results for other less studied problems. Several strategies for proving the existence of admissible solutions are discussed, and existence results are given for fluxes satisfying some additional conditions. These are based on convergence results either for the vanishing viscosity method (with standard viscosity or with specific viscosities "adapted" to the choice of a germ), or for specific germ-adapted finite volume schemes.
Nuclear Reaction Uncertainties, Massive Gravitino Decays and the Cosmological Lithium Problem
Creators: name: Cyburt, Richard H.
name: Ellis, John
name: Fields, Brian D.
name: Luo, Feng
name: Olive, Keith A.
name: Spanos, Vassilis C.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider the effects of uncertainties in nuclear reaction rates on the cosmological constraints on the decays of unstable particles during or after Big-Bang nucleosynthesis (BBN). We identify the nuclear reactions due to non-thermal hadrons that are the most important in perturbing standard BBN, then quantify the uncertainties in these reactions and in the resulting light-element abundances. These results also indicate the key nuclear processes for which improved cross section data would allow different light-element abundances to be determined more accurately, thereby making possible more precise probes of BBN and evaluations of the cosmological constraints on unstable particles. Applying this analysis to models with unstable gravitinos decaying into neutralinos, we calculate the likelihood function for the light-element abundances measured currently, taking into account the current experimental errors in the determinations of the relevant nuclear reaction rates. We find a region of the gravitino mass and abundance in which the abundances of deuterium, He4 and Li7 may be fit with chi^2 = 5.5, compared with chi^2 = 31.7 if the effects of gravitino decays are unimportant. The best-fit solution is improved to chi^2 ~ 2.0 when the lithium abundance is taken from globular cluster data. Some such re-evaluation of the observed light-element abundances and/or nuclear reaction rates would be needed if this region of gravitino parameters is to provide a complete solution to the cosmological Li7 problem.
description: 24 pages, 10 figures
Neutrinos in Non-linear Structure Formation - The Effect on Halo Properties
Creators: name: Brandbyge, Jacob
name: Hannestad, Steen
name: Haugboelle, Troels
name: Wong, Yvonne Y. Y.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We use N-body simulations to find the effect of neutrino masses on halo properties, and investigate how the density profiles of both the neutrino and the dark matter components change as a function of the neutrino mass. We compare our neutrino density profiles with results from the N-one-body method and find good agreement. We also show and explain why the Tremaine-Gunn bound for the neutrinos is not saturated. Finally we study how the halo mass function changes as a function of the neutrino mass and compare our results with the Sheth-Tormen semi-analytic formulae. Our results are important for surveys which aim at probing cosmological parameters using clusters, as well as future experiments aiming at measuring the cosmic neutrino background directly.
description: 20 pages, 8 figures
Early Initiation of a Newborn Individualized Developmental Care and Assessment Program (NIDCAP) Reduced Length of Stay
Creators: name: Moody, Cheryl
name: Callahan, Tiffany J.
name: Sables-Baus, Sharon
name: Moran, Susan L.
Publisher: name: F1000 Research Limited
Year: 2019

description: Infants born at ≤ 32 weeks gestation are at risk for developmental delays
	Newborn Individualized Developmental Care and Assessment Program (NIDCAP):

		Minimizes developmental delays.
		Decreases length of stay.
		Improves parental satisfaction.

	Only 17% of infants admitted to a Midwestern United States NICU ≤ 32 weeks gestation received developmental referrals during baseline assessment.

Primary Purpose:

	To increase NIDCAP referrals to 50% within 12 months for  infants admitted at ≤ 32 weeks gestational  age

Secondary Objectives:

	Compare gestational age at discharge for eligible infants receiving NIDCAP intervention with those that did not.
	Compare timing of initiation of NIDCAP on gestational age at discharge.
Early Initiation of a Newborn Individualized Developmental Care and Assessment Program (NIDCAP) Reduced Length of Stay
Creators: name: Moody, Cheryl
name: Callahan, Tiffany J.
name: Moran, Susan L.
name: Sables-Baus, Sharon
Publisher: name: F1000 Research Limited
Year: 2019

description: Infants born at ≤ 32 weeks gestation are at risk for developmental delays
	Newborn Individualized Developmental Care and Assessment Program (NIDCAP):

		Minimizes developmental delays.
		Decreases length of stay.
		Improves parental satisfaction.

	Only 17% of infants admitted to a Midwestern United States NICU ≤ 32 weeks gestation received developmental referrals during baseline assessment.

Primary Purpose:

	To increase NIDCAP referrals to 50% within 12 months for  infants admitted at ≤ 32 weeks gestational age.

Secondary Objectives:

	Compare gestational age at discharge for eligible infants receiving NIDCAP intervention with those that did not.
	Compare timing of initiation of NIDCAP on gestational age at discharge.
MOESM1 of Genetic architecture of quantitative traits in beef cattle revealed by genome wide association studies of imputed whole genome sequence variants: I: feed efficiency and component traits
Creators: name: Zhang, Feng
name: Wang, Yining
name: Mukiibi, Robert
name: Chen, Liuhong
name: Vinsky, Michael
name: Plastow, Graham
name: Basarab, John
name: Stothard, Paul
name: Li, Changxi
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Evolutionary Biology
subject: Biological Sciences not elsewhere classified
subject: Information Systems not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Mental Health
subject: Virology
subject: Computational Biology

description: Additional file 1: Figure S1. Distribution of SNP allele substitution effects (left) and additive genetic variances explained by single SNPs (right) for RFI, DMI, ADG, and MWT based on 7.8 M whole genome sequence (WGS) variants; Figure S2. The enriched cellular and molecular functions (top) and cell morphology network (bottom) for RFI; Figure S3. The enriched cellular and molecular functions (top) and carbohydrate metabolism network (bottom) for DMI; Figure S4. The enriched cellular and molecular functions (top) and carbohydrate metabolism network (bottom) for ADG; Figure S5. The enriched cellular and molecular functions (top) and cellular compromise network (bottom) for MWT; Figure S6. Lipid metabolism network for RFI and its component traits DMI, ADG, and MWT; Figure S7. Common lead significant SNPs with the same IDs (a) and candidate genes (b) among RFI and its three component traits at thresholds P-value < 1.00E-05 and FDR < 0.10 based on the imputed 7.8 M DNA variant GWAS; Figure S8. Principal component analyses of Canadian beef cattle populations (N = 7573) based on the 50 K (a) and 7.8 M WGS (b) panels.
Many-Body perturbation theory calculations on circular quantum dots
Creators: name: Waltersson, Erik
name: Lindroth, Eva
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The possibility to use perturbation theory to systematically improve calculations on circular quantum dots is investigated. A few different starting points, including Hartree-Fock, are tested and the importance of correla- tion is discussed. Quantum dots with up to 12 electrons are treated and the effects of an external magnetic field are examined. The sums over excited states are carried out with a complete finite radial basis set obtained through the use of B splines. The calculated addition energy spectra are compared with experiments and the implications for the filling sequence of the third shell are discussed in detail.
description: 13 pages, 9 figures, 2 tables
Sex differences in adult hippocampal neurogenesis and the influence of estradiol
Creators: name: Yagi, Shunya
Publisher: name: University of British Columbia
Year: 2023

description: Sex differences exist in hippocampal plasticity, cognition, and in various brain diseases that target the integrity of the hippocampus. Females are more likely to be diagnosed with stress and anxiety related disorders and have a greater lifetime risk for Alzheimer’s disease than males. Females are more likely to experience greater cognitive decline in Alzheimer’s disease and cognitive symptoms in depression and post-traumatic stress disorders, and these diseases characterized by hippocampal dysfunction. The hippocampus is a highly plastic structure, important for processing higher order information, and is sensitive to intrinsic and extrinsic factors such as gonadal hormones and cognitive training. The hippocampus retains the ability to produce new neurons in the dentate gyrus, and new neurons play an important role in pattern separation, a process of separating similar inputs and making distinct neural representations during memory encoding. This thesis investigated sex differences in and the effects of estrogens on basal characteristics of neurogenesis, and in neural network of activated neurons following pattern separation. In Chapter 2, I found that adult-born neurons matured faster in males compared to females, whereas males showed a greater reduction in neurogenesis between one week and two weeks after mitosis. The faster maturation and greater attrition of new neurons in males compared to females suggests greater potential for neurogenesis to respond to external stimuli in males. In Chapter 3, I found that females showed greater contextual pattern separation compared to males, with females and males employing different brain networks during fear memory retrieval. In Chapter 4, I found that estradiol and estrone initially enhanced production of immature neurons whereas long exposure to estrogens eliminated the enhancing effects on neurogenesis. In Chapter 5, I found that a chronic high dose of estradiol reduced adult neurogenesis in females, but also enhanced functional connectivity in the hippocampus during spatial pattern separation. Overall, these results highlight the importance of studying sex differences and hormonal regulation of hippocampal neuroplasticity and the contribution of adult neurogenesis to hippocampus-dependent cognition. Therefore, attention to these factors in research will lead to a better understanding how sex contributes to the susceptibility to hippocampus-related diseases.
Preventive conservation and sustainability of heritage collections in transit
Creators: name: Galán-Pérez, Ana
name: Biedermann, Anna
name: Galán-Pérez, Francisco Javier
name: Ferreiro, Luis
Publisher: name: Estudos de Conservação e Restauro
Year: 2020

description: This paper aims to present the complexity of the preventive conservation and sustainability of the collections that are included in the temporary exhibition ‘Auschwitz. Not Long Ago. Not Far Away’, opened in Madrid in December 2017 and scheduled to travel to new destinations over the next 7 years. It was produced in co-operation with the State Museum of Auschwitz-Birkenau, Poland. The exhibit objects belong to more than twenty international collections concerned with the Heritage of the Holocaust. The methodology to analyze the sustainability of a traveling exhibition has been introduced, in the stage of the preparation, production, assembly, operation, disassembly, and transportation to the next venue, in order to take into consideration the whole Life Cycle of the exhibition. The indicators to consider its impact in the three dimensions of sustainability: environmental, economic and social has been proposed.
description: Estudos de Conservação e Restauro, n. 11 (2020): YOCOCU CONFERENCE 2019: 3rd International Conference of Green Conservation of Cultural Heritage
Medication-induced dysphagia: A scoping review.
Creators: name: Chalmers, Leanne
name: Calton, Emily
name: Cocks, Naomi
name: Arnoldi, Brittany
Publisher: name: OSF Registries
Year: 2023
Subjects: subject: Pharmacy and Pharmaceutical Sciences
subject: Medicine and Health Sciences
subject: Communication Sciences and Disorders
subject: Adverse Effects
subject: Deglutition
subject: Drug Therapy
subject: Dysphagia
subject: Pharmacotherapy

description: Objective: The objective of this scoping review is to understand the extent and type of evidence in relation to medication induced dysphagia from prescription, over the counter (OTC) and complementary medications.

Introduction: Various drug classes are known to have a negative impact on swallowing function. Previous research in this area has predominantly focused on the elderly population, offered restricted data regarding individual medications, and exclusively investigated conventional medications. This scoping review will encompass all types of medications, including prescription, OTC, and complementary medications.

Inclusion criteria: Research pertaining to prescription, OTC and complementary medicines (e.g., dietary supplements, herbal remedies, and vitamins) used in adults >18 years old will be considered for inclusion. Studies and reports that document signs or symptoms of sensory and motor dysphagia in the oral preparatory, oral transfer, pharyngeal, and oesophageal stages of swallowing will be considered for inclusion. Studies and reports documenting the occurrence, clinical manifestations, or underlying mechanisms or pathophysiology of medication induced dysphagia will be considered for inclusion.

Methods: Three online databases (Medline, EMBASE, and Web of Science) will be searched. Additionally, the Food and Drugs Administration (FDA) Adverse Event Reporting System (FAERS), the Therapeutic Goods Administration (TGA) Database of Adverse Event Notifications (DAEN) and clinical trial registries including the Australian and New Zealand Clinical Trials Registry. The search will be limited to articles written in or able to be translated to English. Titles and abstracts will then be screened by two or more independent reviewers and potentially relevant sources will be subject to a full text review. Data will be extracted using a data extraction tool developed by the reviewers. The results will be displayed in tables and accompanied by a narrative summary. Additionally, a comprehensive list of medications will be presented as a clinical resource for healthcare practitioners.
MPEC 2024-S66 : 2024 SD1
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 SD1

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Renormalized parameters and perturbation theory for an n-channel Anderson model with Hund's rule coupling: Asymmetric case
Creators: name: Nishikawa, Yunori
name: Crow, Daniel D. G.
name: Hewson, Alex C.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We explore the predictions of the renormalized perturbation theory for an n-channel Anderson model, both with and without Hund's rule coupling, in the regime away from particle-hole symmetry. For the model with n=2 we deduce the renormalized parameters from numerical renormalization group calculations, and plot them as a function of the occupation at the impurity site, nd. From these we deduce the spin, orbital and charge susceptibilities, Wilson ratios and quasiparticle density of states at T=0, in the different parameter regimes, which gives a comprehensive overview of the low energy behavior of the model. We compare the difference in Kondo behaviors at the points where nd=1 and nd=2. One unexpected feature of the results is the suppression of the charge susceptibility in the strong correlation regime over the occupation number range 1
description: 9 pages, 17 figures
The 2008 extreme outburst of the young eruptive variable star Ex Lupi
Creators: name: Aspin, Colin
name: Reipurth, Bo
name: Herczeg, Gregory
name: Capak, Peter
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: In early 2008, the young low-mass star EX Lupi, the prototype of the EXor class of eruptive variables, optically brightened by over five magnitudes for a period of 7 months. The previous time a change of such amplitude had been observed in EX Lup was over 50 years ago. In this Letter we present new optical and near-IR high resolution spectroscopy of EX~Lup during the 2008 outburst. We investigate the physical characteristics of the outburst both soon after it began and some four months later, and consider the energetics and kinematics observed. Emission line strengths, widths, and profiles changed significantly between the two observations. Also, modeling of the 2.2935 um CO overtone bandhead emission suggests that an inner gap in the circumstellar gas disk around the star may be present and it is from the inner edge of the gas disk that the CO overtone emission probably arises. We derive a mass accretion luminosity and rate during the extreme outburst of ~2+-0.5~Lsun and ~2+-0.5x10^-7 Msun yr^-1, respectively, which suggests that this outburst was indeed one of the strongest witnessed in EX Lup, yet not as strong as those observed in FU Orionis stars.
description: 5 pages, 4 figures
Deconstructing Sanfilippo Syndrome: On the pathophysiological basis and molecular drivers of mucopolysaccharidosis IIIA
Creators: name: DOUEK, ALON MOSHE
Publisher: name: Monash University
Year: 2023
Subjects: classificationCode: 320905
subject: Neurology and neuromuscular diseases
classificationCode: 300110
subject: Transgenesis
classificationCode: 320606
subject: Regenerative medicine (incl. stem cells)
classificationCode: 320999
subject: Neurosciences not elsewhere classified
classificationCode: 300104
subject: Genetically modified animals
classificationCode: 310511
subject: Neurogenetics

description: Sanfilippo syndrome (MPS III) is a leading cause of fatal childhood dementia. This thesis describes the development and characterisation of novel experimental models of a Sanfilippo syndrome subtype, MPS IIIA, towards a better understanding of its underlying pathophysiology and enhanced outcomes for patients.
Approximating Densities of States with Gaps
Creators: name: Haydock, Roger
name: Nex, C. M. M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Reconstructing a density of states or similar distribution from moments or continued fractions is an important problem in calculating the electronic and vibrational structure of defective or non-crystalline solids. For single bands a quadratic boundary condition introduced previously [Phys. Rev. B 74, 205121 (2006)] produces results which compare favorably with maximum entropy and even give analytic continuations of Green functions to the unphysical sheet. In this paper, the previous boundary condition is generalized to an energy-independent condition for densities with multiple bands separated by gaps. As an example it is applied to a chain of atoms with s, p, and d bands of different widths with different gaps between them. The results are compared with maximum entropy for different levels of approximation. Generalized hypergeometric functions associated with multiple bands satisfy the new boundary condition exactly.
description: Accepted for publication in Physical Review B
Multipartite entanglement in quantum algorithms
Creators: name: Bruß, D.
name: Macchiavello, C.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the entanglement features of the quantum states employed in quantum algorithms. In particular, we analyse the multipartite entanglement properties in the Deutsch-Jozsa, Grover and Simon algorithms. Our results show that for these algorithms most instances involve multipartite entanglement.
Nutzung von Social-Media bei Forschenden
Creators: name: Orth, Astrid
name: Beucke, Daniel
name: McLeish, Ben
Publisher: name: Zenodo
Year: 2019
Subjects: altmetrics
metrics
bibliothekskongress2019

description: ·Welche webbasierten Metriken reflektieren am ehesten wissenschaftlichen Austausch?

·Welche Online-Aktionen werden von Forschende welcher Karrierestufen ausgeführt?

·Welche webbasierten Metriken sind Indikatoren für wissenschaftliche Wertschätzung?

·Welche Online-Aktionen drücken positive Würdigung aus?

·Welche Vorbehalte haben Forschende hinsichtlich der beruflichen Nutzung von Social Media?
The Dynamical Evolution of Be star disks
Creators: name: Haubois, Xavier
name: Carciofi, Alex C.
name: Okazaki, Atsuo T.
name: Bjorkman, Jon E.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present a novel theoretical tool to analyze the dynamical behaviour of a Be disk fed by non-constant decretion rates. It is mainly based on the computer code HDUST, a fully three-dimensional radiative transfer code that has been successfully applied to study several Be systems so far, and the SINGLEBE code that solves the 1D viscous diffusion problem. We have computed models of the temporal evolution of different types of Be star disks for different dynamical scenarios. By showing the behaviour of a large number of observables (interferometry, polarization, photometry and spectral line profiles), we show how it is possible to infer from observations some key dynamical parameters of the disk.
description: IAU 272 symposium proceedings, 3 pages, 1 figure
Hybrid InAs nanowire-vanadium proximity SQUID
Creators: name: Spathis, Panayotis
name: Biswas, Subhajit
name: Roddaro, Stefano
name: Sorba, Lucia
name: Giazotto, Francesco
name: Beltram, Fabio
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report the fabrication and characterization of superconducting quantum interference devices (SQUIDs) based on InAs nanowires and vanadium superconducting electrodes. These mesoscopic devices are found to be extremely robust against thermal cycling and to operate up to temperatures of $\sim2.5$~K with reduced power dissipation. We show that our geometry allows to obtain nearly-symmetric devices with very large magnetic-field modulation of the critical current. All these properties make these devices attractive for on-chip quantum-circuit implementation.
description: 3 pages, 3 figures
title:   THE EFFECTS OF SOCIAL AND NONSOCIAL CONTEXTUAL STIMULI ON THE RENEWAL OF COCAINE SEEKING
Creators: name: Humburg, Bree
Publisher: name: University of Kentucky Libraries
Year: 2023
Subjects: classificationCode: 5.1
subject: FOS: Psychology

description: Those with substance use disorders can undergo craving and relapse when re-exposed to a drug-associated context. This study determined if renewal of cocaine seeking is differentially controlled by contexts consisting of social and/or nonsocial stimuli. Experiment 1, rats self-administered cocaine in Context A which included a social peer and house light illumination. Following self-administration, rats were randomly assigned to an AAA or ABA group for extinction and renewal. For the AAA rats, context was similar to self-administration; for ABA rats, the drug-associated stimuli (peer and house light) were removed (Context B). Following extinction, renewal of cocaine seeking was examined by testing the peer alone, house light alone, or the combination. Experiment 2 was similar, except only a house light (no peer) was used throughout the experiment. Results revealed rats acquired cocaine self-administration and extinguished lever pressing for both experiments. For Experiment 1, ABA rats renewed cocaine seeking to the peer alone and peer+house light but not the house light alone. Experiment 2 found ABA rats renewed cocaine seeking to the house light alone, but the AAA group did not. These data indicate that social peers serve as powerful stimuli that can overshadow nonsocial stimuli in the renewal of cocaine seeking.
description: © 2023 Bree Humburg
Glocalizing archaic Sicily : Aegyptiaca and Mediterranean entanglements
Creators: name: Minniti, Caterina
Publisher: name: University of British Columbia
Year: 2025

description: Sicily has yielded roughly 260 Egyptian-looking objects, commonly referred to as Aegyptiaca, found in Archaic (ca. 776-480 BCE) archaeological contexts. These include scarabs, amulets, vessels, and funerary statuettes. The diffusion of these artifacts throughout the Mediterranean was vast, as they have been discovered in sites from Iberia to the Levant. However, the presence of these types of objects in Sicily has not been fully investigated in previous scholarship. On the one hand, many studies have focused only on the formal elements of the artifacts. On the other, works on Egyptian and Egyptianizing objects in Sicily have seldom taken into account the whole island, and even less often framed the data in the context of broader, pan-Mediterranean trends. This dissertation focuses not only on the roles that Aegyptiaca played in the lives of the inhabitants of Sicily – their physical presence, and the meaning and agency generated by them – but also on how their use can help us reassess Sicily’s position in Archaic-period networks of trade and cultural exchange across the Mediterranean. Throughout my dissertation, I address specific questions about the use of Egyptian and Egyptianizing objects, particularly the ways in which this widespread genre of material could undergo different processes of appropriation, and why. Analyzing the adaptation of objects to suit the needs of new patrons can help us gain new insight into the negotiation of practices and the functions of material culture in discourses of identity and power. Consequently, I am investigating the artifacts and their contexts to gain greater clarity on how the inhabitants of this island at the physical center of cross-Mediterranean networks were responding to international, globalizing trends, and adapting imported material culture to fit local agendas.
Computing the distance between quantum channels: Usefulness of the Fano representation
Creators: name: Benenti, Giuliano
name: Strini, Giuliano
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The diamond norm measures the distance between two quantum channels. From an operational vewpoint, this norm measures how well we can distinguish between two channels by applying them to input states of arbitrarily large dimensions. In this paper, we show that the diamond norm can be conveniently and in a physically transparent way computed by means of a Monte-Carlo algorithm based on the Fano representation of quantum states and quantum operations. The effectiveness of this algorithm is illustrated for several single-qubit quantum channels.
description: 8 pages, 7 figures
De novo assembly of a zoanthid transcriptome for the study of corallicolids
Creators: name: Shivak, Jade
Publisher: name: University of British Columbia
Year: 2023

description: The discovery of widespread apicomplexan symbionts of anthozoans, known as corallicolids, has raised many questions about their evolutionary history, physiology, and ecology. However, gathering molecular data from these unicellular eukaryotes is challenging due to their small size, low abundance in host tissue, and inconsistent prevalence in host populations. This task is further complicated by the presence of contamination from host genetic material in the samples. Parazoanthus swiftii is a corallicolid host with a high infection rate and no dinoflagellate symbionts making it a potentially useful model for this association. The objective of my thesis is to develop baseline genetic resources for the study of P. swiftii and its symbionts using transcriptomics. Several P. swiftii transcriptomes were sequenced, assembled, and filtered, and BUSCO analysis detected 88% of proteins from a set of conserved orthologs. Although less than half of the transcripts were functionally annotated, 56% of predicted proteins were present across all of the samples. Two of the five samples had a diverging expression profile and lower relative expression of anthozoan transcripts. The dataset also contained 1059 potential apicomplexan genes, including three that were lineage-specific. This transcriptome will aide in the study of corallicolids and their host associations, as well as add to the number of genetic resources available for zoanthids.
Design and imitation learning study on Bumpybot robot
Creators: name: Jaiswal, Mehar Shaileshkumar
Publisher: name: The University of Texas at Austin
Year: 2023
Subjects: Imitation learning
Robot Design

description: We are in an era where robotics research is rapidly growing. The robotics industry is booming and more and more people are open to living with robots in and around their spaces of work, and leisure. People are expecting robots to provide more than one service. For this reason, the Bumpybot robot is designed for domestic or indoor use around people of many ages while. It becomes our duty then to make sure the designs and deployments of these robots are safe and reliable. During the course of this thesis, I studied the design of outer shells for Bumpybot using multiple iterations and various prototyping methods. As a second part of my thesis, I used an imitation learning algorithm to train and then deploy the simulated robot to track trajectories. The combined study on design and imitation learning was done to enhance safety, reliability, and navigation in human environments.
蛾 (Ga)
Creators: name: van der Schyff, Dylan
name: Lee, Peggy
name: Saragossi, Andrew
Publisher: name: The University of Melbourne
Year: 2023
Subjects: classificationCode: 360302
subject: Music composition and improvisation
classificationCode: 360304
subject: Music performance
classificationCode: 360399
subject: Music not elsewhere classified

description: 蛾 is the kanji symbol for largely nocturnal beings that possess two large wings and are covered in microscopic scales (moths). 蛾 (Ga) is also the name of this recording of thirteen guided improvisations, which are inspired by the actions, sounds, and imagined worlds of other-than-human life forms. The improvisations invite the listener to contemplate the alien worlds that exist all around us but that nevertheless extend well beyond the borders of human perception and understanding.

The ensemble is comprised of Dylan van der Schyff (drums/percussion), Peggy Lee (cello), Andrew Saragossi (saxophones), and Andrew Doo (drums/percussion). The performers employ an arsenal of extended techniques, found objects, and unusual sonic juxtapositions, often blurring the boundaries of where one instrument ends and another begins.

This recording was made with minimal miking and with all performers in the same room (one mic per performer and a stereo pair). There were no overdubs, multiple takes, or editing of any kind. The music documented here is the totality produced by the session. Each track is named for a variety of moth.creditsreleased December 8, 2023

Dylan van der Schyff - drums/percussion
Peggy Lee - cello
Andrew Saragossi - saxophones
Andrew Doo - drums/percussion

Recorded by Dylan van der Schyff on March 4th, 2023, at the Brian Brown Studio, University of Melbourne, Southbank.
Inversion formulas for the broken-ray Radon transform
Creators: name: Florescu, Lucia
name: Markel, Vadim A.
name: Schotland, John C.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mathematical Physics (math-ph)
subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: We consider the inverse problem of the broken ray transform (sometimes also referred to as the V-line transform). Explicit image reconstruction formulas are derived and tested numerically. The obtained formulas are generalizations of the filtered backprojection formula of the conventional Radon transform. The advantages of the broken ray transform include the possibility to reconstruct the absorption and the scattering coefficients of the medium simultaneously and the possibility to utilize scattered radiation which, in the case of the conventional X-ray tomography, is typically discarded.
description: To be submitted to Inverse Problems
UBIRA eTheses repository - prettifying the ugly stepchild of scholarly communication
Creators: name: Herterich, Patricia
Publisher: name: Zenodo
Year: 2019

description: Electronic theses are often neglected when talking about scholarly communication. The University of Birmingham eTheses repository is one of the oldest and most popular (in terms of downloads) theses repositories in the UK. In early 2019, the repository was upgraded to a new version of ePrints which provided an opportunity to review our thesis processing workflows and the guidance we provide graduates to engage with aspects of Open Research at this stage. The poster will present improvements in design of the University of Birmingham eTheses repository, changes in workflows moving from mediated submission to self-deposit by students, and challenges and queries it raised around copyright guidance and access options currently offered. It will provide a starting point for discussion which significance electronic theses have in the scholarly communications landscape and how libraries can adequately support them as a research output.

Poster presented at the Scholarly Communication Conference, University of Kent, 2-3 May 2019
Plasma Magnetosphere of Rotating Magnetized Neutron Star in the Braneworld
Creators: name: Morozova, V. S.
name: Ahmedov, B. J.
name: Abdujabbarov, A. A.
name: Mamadjanov, A. I.
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Plasma magnetosphere surrounding rotating magnetized neutron star in the braneworld has been studied. For the simplicity of calculations Goldreich-Julian charge density is analyzed for the aligned neutron star with zero inclination between magnetic field and rotation axis. From the system of Maxwell equations in spacetime of slowly rotating star in braneworld, second-order differential equation for electrostatic potential is derived. Analytical solution of this equation indicates the general relativistic modification of an accelerating electric field and charge density along the open field lines by brane tension. The implication of this effect to the magnetospheric energy loss problem is underlined. It was found that for initially zero potential and field on the surface of a neutron star, the amplitude of the plasma mode created by Goldreich-Julian charge density will increase in the presence of the negative brane charge. Finally we derive the equations of motion of test particles in magnetosphere of slowly rotating star in the braneworld. Then we analyze particle motion in the polar cap and show that brane tension can significantly change conditions for particle acceleration in the polar cap region of the neutron star.
description: 18 pages, 4 figures, accepted by Journal Astrophysics and Space Science.
Autonomous Port Navigation With Ranging Sensors Using Model-Based Reinforcement Learning
Creators: name: Herremans, Siemen
name: Anwar, Ali
name: Troch, Arne
name: Ravijts, Ian
name: Vangeneugden, Maarten
name: Mercelis, Siegfried
name: Hellinckx, Peter
Publisher: name: arXiv
Year: 2023
Subjects: subject: Robotics (cs.RO)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Autonomous shipping has recently gained much interest in the research community. However, little research focuses on inland - and port navigation, even though this is identified by countries such as Belgium and the Netherlands as an essential step towards a sustainable future. These environments pose unique challenges, since they can contain dynamic obstacles that do not broadcast their location, such as small vessels, kayaks or buoys. Therefore, this research proposes a navigational algorithm which can navigate an inland vessel in a wide variety of complex port scenarios using ranging sensors to observe the environment. The proposed methodology is based on a machine learning approach that has recently set benchmark results in various domains: model-based reinforcement learning. By randomizing the port environments during training, the trained model can navigate in scenarios that it never encountered during training. Furthermore, results show that our approach outperforms the commonly used dynamic window approach and a benchmark model-free reinforcement learning algorithm. This work is therefore a significant step towards vessels that can navigate autonomously in complex port scenarios.
description: Presented at 42nd International Conference on Ocean, Offshore & Arctic Engineering. June 11 - 16, 2023. Melbourne, Australia
Controlled Operations in a Strongly Correlated Two-Electron Quantum Ring
Creators: name: Waltersson, Erik
name: Lindroth, Eva
name: Pilskog, Ingjald
name: Hansen, J. P.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We have analyzed the electronic spectrum and wave function characteristics of a strongly correlated two-electron quantum ring with model parameters close to those observed in experiments. The analysis is based on an exact diagonalization of the Hamiltonian in a large B-spline basis. We propose a new qubit pair for storing quantum information, where one component is stored in the total electron spin and one multivalued "quMbit" is represented by the total angular momentum. In this scheme the controlled NOT (CNOT) quantum gate is demonstrated with near 100% fidelity for a realistic far infrared electromagnetic pulse.
description: 5 pages, 5 figures, \c{opyright} 2009 The American Physical Society
A note on the AdS/CFT correspondence and the nature of spacetime in quantum gravity
Creators: name: Silva, Carlos
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper, we address the nature of spacetime in quantum gravity in light of a new version of the holographic principle that has established a relationship between string theory and polymer holonomy structures similar to Loop Quantum Cosmology spin networks. In front of the results found out, it is possible to argue that, for such a relationship to work, spacetime must be seen as emergent from a fundamental structure whose degrees of freedom correspond to quantum correlations only.
description: Published in: Nucl.Phys.B 998 (2024) 116402. Possible text overlap with arxiv 2205.09502 [gr-qc] by the same author
Using ACIS on the Chandra X-ray Observatory as a particle radiation monitor
Creators: name: Grant, C. E.
name: LaMarr, B.
name: Bautz, M. W.
name: O'Dell, S. L.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The Advanced CCD Imaging Spectrometer (ACIS) is one of two focal-plane instruments on the Chandra X-ray Observatory. During initial radiation-belt passes, the exposed ACIS suffered significant radiation damage from trapped soft protons scattering off the x-ray telescope's mirrors. The primary effect of this damage was to increase the charge-transfer inefficiency (CTI) of the ACIS 8 front-illuminated CCDs. Subsequently, the Chandra team implemented procedures to remove the ACIS from the telescope's focus during high-radiation events: planned protection during radiation-belt transits; autonomous protection triggered by an on-board radiation monitor; and manual intervention based upon assessment of space-weather conditions. However, as Chandra's multilayer insulation ages, elevated temperatures have reduced the effectiveness of the on-board radiation monitor for autonomous protection. Here we investigate using the ACIS CCDs themselves as a radiation monitor. We explore the 10-year database to evaluate the CCDs' response to particle radiation and to compare this response with other radiation data and environment models.
description: 10 pages, 5 figures. To appear in Proc. SPIE vol. 7732