cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Polarization of Starlight by Unresolved and Oblate Extra-solar Planet in Elliptical Orbit
Creators: name: Sengupta, Sujan
name: Maiti, Malay
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We calculate the degree of linear polarization of radiation from stars having planets that may not be resolved spatially. We assume single scattering by water and silicate particulates in the planetary atmosphere. The dilution of the reflected polarized radiation of the planet by the unpolarized stellar radiation and the effect of oblateness of the planet as well as its elliptical orbit are included. We employ a chemical equilibrium model to estimate the number density of water and silicate condensates and calculate the degree of linear polarization at R band of starlight as a function of (1) mean size of condensates, (2) planetary oblateness, (3) inclination angle, (4) phase angle, (5) orbital eccentricity e and (6) the epoch of periastron passage. We show that the polarization profile alters significantly at all inclination angles when elliptical orbit is considered and the degree of polarization peaks at the epoch of periastron passage. We predict that detectable amount of linear polarization may arise if the planetary atmosphere is optically thin, the mean size of the condensates is not greater than a few microns and the oblateness of the planet is as high as that of Jupiter.
description: 19 pages including 7 postscript figures, Latex (AASTEX style), Accepted for publication by The Astrophysical Journal
Charged Higgs Production at Linear Colliders in Large Extra Dimensions
Creators: name: Li, Qiang
name: Li, Chong Sheng
name: Oakes, Robert J.
name: Yang, Li Lin
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In the Two-Higgs-Doublet Model(2HDM) with large extra dimensions(LED), we study the contributions of virtual Kaluza-Klein(KK) gravitons to 2HDM charged Higgs production, especially in the two important production processes $e^+e^-\to H^+H^-$ and $e^+e^-\to H^-t\bar{b}$, at future linear colliders (LC). We find that KK graviton effects can significantly modify these total cross sections and also their differential cross sections compared to their respective 2HDM values and, therefore, can be used to probe the effective scale $Λ_T$ up to several TeV. For example, at $\sqrt{s}=2$ TeV, the cross sections for $e^+e^-\to H^+H^-$ and $e^+e^-\to H^-t\bar{b}$ in the 2HDM are 7.4fb for $m_{H^-}=150$ GeV and 0.003fb for $m_{H^-}=1.1$ TeV and $\tanβ=40$, while in LED they are 12.1fb and 0.01fb, respectively, for $Λ_T=4$ Tev.
description: 18 pages, 11 figures; a version to appear in PRD
Static and dynamic properties of 0, pi, and 0-pi ferromagnetic tunnel Josephson Junctions
Creators: name: Pfeiffer, J.
name: Kemmler, M.
name: Koelle, D.
name: Kleiner, R.
name: Goldobin, E.
name: Weides, M.
name: Feofanov, A. K.
name: Lisenfeld, J.
name: Ustinov, A. V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We present experimental studies of static and dynamic properties of 0, pi and 0-pi superconductor-insulator-ferromagnet-superconductor (SIFS) Josephson junctions of small and intermediate length. In the underdamped limit these junctions exhibit a rich dynamical behavior such as resonant steps on the current-voltage characteristics. Varying the experimental conditions, zero field steps, Fiske steps and Shapiro steps are observed with a high resolution. A strong signature of the 0-pi Josephson junction is demonstrated by measuring the critical current as a function of two components (B_x, B_y) of an in-plane magnetic field. The experimental observation of a half-integer zero field step in 0-pi SIFS junctions is presented.
description: 9 pages, 7 figures, 1 table
Constraints on elastic neutrino nucleus scattering in the fully coherent regime from the CONUS experiment
Creators: name: Bonet, H.
name: Bonhomme, A.
name: Buck, C.
name: Fülber, K.
name: Hakenmüller, J.
name: Heusser, G.
name: Hugle, T.
name: Lindner, M.
name: Maneschg, W.
name: Rink, T.
name: Strecker, H.
name: Wink, R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We report the best limit on coherent elastic scattering of electron antineutrinos emitted from a nuclear reactor off germanium nuclei. The measurement was performed with the CONUS detectors positioned at 17.1m from the 3.9GWth reactor core of the nuclear power plant in Brokdorf, Germany. The antineutrino energies of less than 10 MeV assure interactions in the fully coherent regime. The analyzed dataset includes 248.7 kgd with the reactor turned on and background data of 58.8 kgd with the reactor off. With a quenching parameter of k = 0.18 for germanium, we determined an upper limit on the number of neutrino events of 85 in the region of interest at 90% confidence level. This new CONUS dataset disfavors quenching parameters above k = 0.27, under the assumption of standard-model-like coherent scattering of the reactor antineutrinos.
description: 6 pages, 4 figures, 1 table
Gnesiotrocha de Beauchamp 1965
Creators: name: Davies, Natalie
name: Lafleur, Alexandre
name: Hochberg, Rick
name: Walsh, Elizabeth J.
name: Wallace, Robert L.
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia

description: Superorder Gnesiotrocha de Beauchamp, 1965   Within the diversity exhibited by rotifers, superorder Gnesiotrocha are distinct from superorder Pseudotrocha (order Ploima) in that all gnesiotrochans (1) possess a foot that lack toes, (2) their anterior end is either a funnel-shaped structure or possesses ciliated lobes, and (3) their trophi are either malleoramate or uncinate (Edmondson 1959; Koste 1978; Ruttner-Kolisko 1974; Wallace & Snell 2010; Wallace et al. 2006). Ploimids may lack a foot, and, if present, may possess toes; their anterior end and trophi do not resemble that of the sessile taxa. Uncinate trophi possess few teeth: usually one or more large, pincer-like teeth and a few smaller teeth (Fig. 2A); malleoramate trophi possess crescent-shaped manubria and unci with numerous club-shaped teeth (Fig. 2B). Teeth close to the fulcrum are usually larger than those more distant. Trophi in the Flosculariaceae characteristically exhibit a grinding or pounding-like action, which is not seen in the Collothecacea.
description: Published as part of Davies, Natalie, Lafleur, Alexandre, Hochberg, Rick, Walsh, Elizabeth J. & Wallace, Robert L., 2024, Key to sessile gnesiotrochan rotifers: Families, monospecific species in Flosculariidae, species of Atrochidae, Conochilidae, and Limnias, pp. 497-520 in Zootaxa 5397 (4) on page 499, DOI: 10.11646/zootaxa.5397.4.3, http://zenodo.org/record/10469053
Chaotic semi-express buses in a loop
Creators: name: Saw, Vee-Liem
name: Vismara, Luca
name: Chew, Lock Yue
Publisher: name: arXiv
Year: 2020
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: Urban mobility involves many interacting components: buses, cars, commuters, pedestrians, trains etc., making it a very complex system to study. Even a bus system responsible for delivering commuters from their origins to their destinations in a loop service already exhibits very complicated dynamics. Here, we investigate the dynamics of a simplified version of such a bus loop system consisting of two buses serving three bus stops. Specifically, we consider a configuration of one bus operating as a normal bus which picks up passengers from bus stops $A$ and $B$, and then delivers them to bus stop $C$, whilst the second bus acts as an express bus which picks up passengers only from bus stop $B$ and then delivers them to bus stop $C$. The two buses are like asymmetric agents coupled to bus stop $B$ as they interact via picking up passengers from this common bus stop. Intriguingly, this \emph{semi-express} bus configuration is more efficient and has a lower average waiting time for buses, compared to a configuration of two normal buses or a configuration of two express buses. We reckon the efficiency arises from the chaotic dynamics exhibited in the semi-express system, where the tendency towards anti-bunching is greater than that towards bunching, in contradistinction to the regular bunching behavior of two normal buses or the independent periodic behaviour of two non-interacting express buses.
description: 69 pages, 38 figures. To be published in Chaos
The Self Representation in Schizophrenic patients: Considerations on the Draw a Tree Test
Creators: name: Settineri, Salvatore
name: Pagano Dritto, Irene
name: Morabito, Vanessa
name: Mento, Carmela
Publisher: name: University of Messina
Year: 2015

description: Abstract


Objective: The tree is the archetypal symbol of the identification in the growing life. The objective of this study is to evaluate the representation of the self in schizophrenic patients through the tree drawing.


Methods: Were identified 36 patients, 22 women and 14 (M-age=53), suffering from schizophrenic disorder. Through the Scale for the Assessment of Negative Symptoms (SANS) and the Scale for the Assessment of Positive Symptoms (SAPS) positive and negative symptoms, and the reactive tree representation of the self were assessed.




Results: In the group with negative symptoms archetypal figures are more frequent, such as images that are part of the collective unconscious, or thought more archaic. In patients in which emerges the delirium, that is part of the most evolved thinking, near to the secondary process, the reality testing is better preserved. In cases where there are symptoms mixed the tree structure leads to an archetypal image.


Conclusions: This study shows that in the draw of the tree trunk-to-crown ratio in schizophrenic patients was significantly higher than that of healthy individuals. The usefulness of the study insert itself in the Jungian analytic thought, for which psychotic thought corresponds to an abbaissement of the self activity.




Keyword: Representation of Self; Schizophrenia; Draw a Tree Test.
description: Mediterranean Journal of Clinical Psychology, Vol 3, No 2 (2015)
Structure and design of the GOAP sitemap of the microsite for the adoption of Open Access in Angola
Creators: name: United Nations Educational, Scientific and Cultural Organization
name: Ministério Do Ensino Superior, Ciência
name: Redalyc-Universidad Autónoma Del Estado De México
name: AmeliCA
name: Universidade Óscar Ribas
Publisher: name: Zenodo
Year: 2022
Subjects: Open Access
Angola
Africa
Repositories
Open Science
Interoperability

description: Work derived from the collaborative project among Redalyc UAEM, AmeliCA, MESCTI and U. Óscar Ribas funded by UNESCO for the development of an Open Access strategy in Angola. Vol. 35 of 38
Preliminaries to Tonemic and Tonomechanical Analysis for the Chalcatongo Dialect of Mixtec
Creators: name: Faraclas, Nicholas
name: Hinton, Leanne
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2020
Subjects: Chalcatongo de Hidalgo Mixtec language

description: Class paper, two versions (handwritten and typed originals), including hand-drawn tables at back, with instructor's handwritten comments.
Quenching Mechanisms of Photon Superradiance
Creators: name: Blas, Diego
name: Witte, Samuel J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Rapidly rotating black holes are known to develop instabilities in the presence of a sufficiently light boson, a process which becomes efficient when the boson's Compton wavelength is roughly the size of the black hole. This phenomenon, known as black hole superradiance, generates an exponentially growing boson cloud at the expense of the rotational energy of the black hole. For astrophysical black holes with $M \sim \mathcal{O}(10) \, M_\odot$, the superradiant condition is achieved for bosons with $m_b \sim \mathcal{O}(10^{-11} ) \, {\rm eV}$; intriguingly, photons traversing the intergalactic medium (IGM) acquire an effective mass (due to their interactions with the ambient plasma) which naturally resides in this range. The implications of photon superradiance, i.e. the evolution of the superradiant photon cloud and ambient plasma in the presence of scattering and particle production processes, have yet to be thoroughly investigated. Here, we enumerate and discuss a number of different processes capable of quenching the growth of the photon cloud, including particle interactions with the ambient electrons and back-reactions on the effective mass (arising e.g. from thermal effects, pair-production, ionization of of the local background, and modifications to the dispersion relation from strong electric fields). This work naturally serves as a guide in understanding how interactions may allow light exotic bosons to evade superradiant constraints.
description: v2: published version in PRD. Added one figure and section on ionization via Stark effect. Conclusions unchanged. v1: 8 pages, 1 figure
Beschluß der Konferenz zu den Ergebnissen der theologischen Gespräche zwischen dem Bund der Evangelischen Kirchen und der Evangelisch-Methodistischen Kirche in der DDR
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 35 Nr. 3 (1986): Ökumenische Rundschau, Band 35, Heft 3
Bose-Luttinger Liquids
Creators: name: Lake, Ethan
name: Senthil, T.
name: Vishwanath, Ashvin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study systems of bosons whose low-energy excitations are located along a spherical submanifold of momentum space. We argue for the existence of gapless phases which we dub "Bose-Luttinger liquids", which in some respects can be regarded as bosonic versions of Fermi liquids, while in other respects exhibit striking differences. These phases have bosonic analogues of Fermi surfaces, and like Fermi liquids they possess a large number of emergent conservation laws. Unlike Fermi liquids however these phases lack quasiparticles, possess different RG flows, and have correlation functions controlled by a continuously varying exponent $η$, which characterizes the anomalous dimension of the bosonic field. We show that when $η>1$, these phases are stable with respect to all symmetric perturbations. These theories may be of relevance to several physical situations, including frustrated quantum magnets, rotons in superfluid He, and superconductors with finite-momentum pairing. As a concrete application, we show that coupling a Bose-Luttinger liquid to a conventional Fermi liquid produces a resistivity scaling with temperature as $T^η$. We argue that this may provide an explanation for the non-Fermi liquid resistivity observed in the paramagnetic phase of MnSi.
description: 19+6 pages; updated references and minor edits
Frostburg Grows: An Intern’s Perspective
Creators: name: Spitzer, Monica
Publisher: name: Maryland Shared Open Access Repository
Year: 2015

description: Monica Spitzer gave a presentation on her intern work with Frostburg Grows and what she learned from the experience in her course, Field Experience in Sustainability Studies (SUST 494). She is currently an FSU senior majoring in Geography and Urban and Regional Planning with a focus on Sustainable Development. The essay provides additional insights regarding her intern experience.
Proper time to the black hole singularity from thermal one-point functions
Creators: name: Grinberg, Matan
name: Maldacena, Juan
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We argue that the proper time from the horizon to the black hole singularity can be extracted from the thermal expectation values of certain operators outside the horizon. This works for fields which couple to higher curvature terms, so that they can decay into two gravitons. To extract this time, it is necessary to vary the mass of the field.
description: 24 + 9 pages. 9 figures. V2: references added. V3: appendix on the 3d case added
Abundance and production of zooplankton and Kokanee salmon (oncorhynchus nerka) in Kootenay Lake, British Columbia during artificial fertilization
Creators: name: Thompson, Lisa Colleen
Publisher: name: University of British Columbia
Year: 2009

description: Experimental fertilization was conducted on Kootenay Lake, B.C. from 1992 to 1997 to compensate for nutrients lost behind hydroelectric dams upstream of the lake. Declining nutrient loads were correlated with lower in-lake nutrient concentrations, chlorophyll a concentrations, and macrozooplankton densities, and a dramatic decline in kokanee salmon {Oncorhynchus nerka) stocks. A simulation model of the lake suggested that increased zooplankton production resulting from fertilization might be shunted into increased abundance of Mysis relicta, an exotic crustacean that competes with kokanee, and that nutrient additions might actually hasten the kokanee decline. In an attempt to test this prediction, nutrients were applied at the north end of the lake, and the response of the food web was monitored along the expected longitudinal productivity gradient. The food web structure along the lake suggests that a trophic gradient of grazeable phytoplankton abundance was established, but that M. relicta may have grazed down any increase in zooplankton production in the fertilized end of the lake. Kokanee distribution and size-at-age along the lake did not correlate with the nutrient gradient. Surprisingly, M. relicta abundance decreased during the experiment, while kokanee abundance increased four-fold, and Gerrard rainbow trout {Oncorhynchus mykiss), which prey mainly on kokanee, also increased in abundance. M. relicta is vulnerable to mortality due to export out of the lake during high flow years, whereas zooplankton replace flow-related mortality through rapid reproduction and kokanee can actively avoid export. High surface water turnover rates, due to large winter snow accumulation during the experiment, likely contributed to increased M. relicta mortality. This physical factor may have shifted the competitive equilibrium between kokanee and M. relicta, by suppressing an increase in M. relicta abundance, and allowed kokanee to take advantage of increased zooplankton availability. Caution should be exercised in extrapolating the results of fertilization in Kootenay Lake to other large lakes where fish populations have been affected by hydroelectric dams or competition from exotic species introductions. Nutrient additions may not reach the desired target species unless the responses of exotic competitors are suppressed by physical factors operating independently of the dynamics of the food web.
Anisotropic 3D Multi-Stream CNN for Accurate Prostate Segmentation from Multi-Planar MRI
Creators: name: Meyer, Anneke
name: Chlebus, Grzegorz
name: Rak, Marko
name: Schindele, Daniel
name: Schostak, Martin
name: van Ginneken, Bram
name: Schenk, Andrea
name: Meine, Hans
name: Hahn, Horst K.
name: Schreiber, Andreas
name: Hansen, Christian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Background and Objective: Accurate and reliable segmentation of the prostate gland in MR images can support the clinical assessment of prostate cancer, as well as the planning and monitoring of focal and loco-regional therapeutic interventions. Despite the availability of multi-planar MR scans due to standardized protocols, the majority of segmentation approaches presented in the literature consider the axial scans only. Methods: We propose an anisotropic 3D multi-stream CNN architecture, which processes additional scan directions to produce a higher-resolution isotropic prostate segmentation. We investigate two variants of our architecture, which work on two (dual-plane) and three (triple-plane) image orientations, respectively. We compare them with the standard baseline (single-plane) used in literature, i.e., plain axial segmentation. To realize a fair comparison, we employ a hyperparameter optimization strategy to select optimal configurations for the individual approaches. Results: Training and evaluation on two datasets spanning multiple sites obtain statistical significant improvement over the plain axial segmentation ($p<0.05$ on the Dice similarity coefficient). The improvement can be observed especially at the base ($0.898$ single-plane vs. $0.906$ triple-plane) and apex ($0.888$ single-plane vs. $0.901$ dual-plane). Conclusion: This study indicates that models employing two or three scan directions are superior to plain axial segmentation. The knowledge of precise boundaries of the prostate is crucial for the conservation of risk structures. Thus, the proposed models have the potential to improve the outcome of prostate cancer diagnosis and therapies.
description: Accepted manuscript in Elsevier Computer Methods and Programs in Biomedicine. Anneke Meyer and Grzegorz Chlebus contributed equally to this work. Sourcecode available at https://github.com/AnnekeMeyer/AnisotropicMultiStreamCNN. Data available at https://doi.org/10.7937/TCIA.2019.DEG7ZG1U
Possible ferro-spin nematic order in NiGa2S4
Creators: name: Bhattacharjee, Subhro
name: Shenoy, Vijay B.
name: Senthil, T.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We explore the possibility that the spin-1 triangular lattice magnet NiGa2 S4 may have a ferro-nematic ground state with no frozen magnetic moment but a uniform quadrupole moment. Such a state may be stabilized by biquadratic spin interactions. We describe the physical properties of this state and suggest experiments to help verify this proposal. We also contrast this state with a `non-collinear' nematic state proposed earlier by Tsunetsugu and Arikawa for NiGa2S4 .
Evolving Network With Different Edges
Creators: name: Sun, Jie
name: Ge, Yizhi
name: Li, Sheng
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We proposed an evolving network model constituted by the same nodes but different edges. The competition between nodes and different links were introduced. Scale free properties have been found in this model by continuum theory. Different network topologies can be generated by some tunable parameters. Simulation results consolidate the prediction.
description: 14 pages, 9 figures, some contents revised, fluctuation of x degree added
Cross-shaped and Degenerate Singularities in an Unstable Elliptic Free Boundary Problem
Creators: name: Andersson, J.
name: Weiss, G. S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35R35; 35J60

description: We investigate singular and degenerate behavior of solutions of the unstable free boundary problem $$Δu = -χ_{\{u>0\}} .$$ First, we construct a solution that is not of class $C^{1,1}$ and whose free boundary consists of four arcs meeting in a {\em cross}-shaped singularity. This solution is completely unstable/repulsive from above and below which would make it hard to get by the usual methods, and even numerics is non-trivial. We also show existence of a degenerate solution. This answers two of the open questions in a recent paper by R. Monneau-G.S. Weiss.
Towards an African narrative on digital sovereignty
Creators: name: Hofmann, Vincent
name: Kettemann, Matthias C.
Publisher: name: Zenodo
Year: 2022
Subjects: Africa, digital sovereignty, digital economy

description: Data about people in Africa should remain in Africa and African states should have the autonomy to decide for themselves how to regulate their digital infrastructure and how to plan their digital futures. In brief: African states need to realize and own their digital sovereignty. But what does sovereignty mean? How can states achieve sovereignty?
A ~5 M_earth Super-Earth Orbiting GJ 436?: The Power of Near-Grazing Transits
Creators: name: Ribas, Ignasi
name: Font-Ribera, Andreu
name: Beaulieu, Jean-Philippe
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Most of the presently identified exoplanets have masses similar to that of Jupiter and therefore are assumed to be gaseous objects. With the ever-increasing interest in discovering lower-mass planets, several of the so-called super-Earths (1 M_earth
description: 5 pages, 3 figures, accepted for publication in The Astrophysical Journal Letters
Distributed speech separation in spatially unconstrained microphone arrays
Creators: name: Furnon, Nicolas
name: Serizel, Romain
name: Illina, Irina
name: Essid, Slim
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Speech separation with several speakers is a challenging task because of the non-stationarity of the speech and the strong signal similarity between interferent sources. Current state-of-the-art solutions can separate well the different sources using sophisticated deep neural networks which are very tedious to train. When several microphones are available, spatial information can be exploited to design much simpler algorithms to discriminate speakers. We propose a distributed algorithm that can process spatial information in a spatially unconstrained microphone array. The algorithm relies on a convolutional recurrent neural network that can exploit the signal diversity from the distributed nodes. In a typical case of a meeting room, this algorithm can capture an estimate of each source in a first step and propagate it over the microphone array in order to increase the separation performance in a second step. We show that this approach performs even better when the number of sources and nodes increases. We also study the influence of a mismatch in the number of sources between the training and testing conditions.
title: The articulation and re-articulation of space in the photographic paradigm
title: Study to test the proposition that a temporally discrete object such as a work of art may contain a story
titleType: AlternativeTitle
Creators: name: Thomas, Timothy Howard
Publisher: name: The Australian National University
Year: 2015

description: Studio practice: Definitions of photography whilst they include ideas oflight, optics and chemistry or digital sensors also emphasise a link to real objects in real spaces. Henry Fox Talbot published the results of his successful experiment in fixing images from a camera obscura as The Pencil of Nature (1844 -1846), suggesting that nature was drawing itself without human intervention. It is this physical link with the real that is the basis of photographic truth claims. The photograph is used as evidence that these things were in that space. More recently Patrick Maynard leverages this link with real things and describes photography as an Engine of Visualisation, adding how we use photographs to a definition of photography However computer 3D modeling software makes virtual spaces available and allows us to place virtual objects in those spaces. Virtual light can illuminate and a virtual camera can frame the object in the virtual space. Calculating the interaction of light, object and camera allows for a picture derived from the virtual space. It is hard not to think of these pictures as photographs yet doing so has implications for our understanding of photography. This studio-based study investigates the photographic paradigm by making photographs of virtual objects in a virtualenvironment and adds to a broader understanding of photography as practice independent of actual subjects and actual light. Dissertation Component: Study to test the proposition that a temporally discrete object such as a work of art may contain a story. When we look at a pictorial work of art we are presented with a composition that contains a number of spatial relationships. There is thespace bounded by the edges of the work that include the distribution of theart's compositional elements. This framed space is nested within the viewing space that is the space of the viewer as they look at the work of art. There is also picture space that is created in the picture that we use to organise the compositional elements on a depth axis. It is the created picture space that is made in response to our need to make sense of the picture that this dissertation uses to test the proposition that a temporally discrete objectsuch as a work of art may contain a story.
description: Dissertation: Study to test the proposition that a temporally discrete object such as a work of art may contain a story -- Studio Practice: the articulation and rearticulation of space in the photographic paradigm.
Time-dependent mediators in survival analysis: Modelling direct and indirect effects with the additive hazards model
Creators: name: Aalen, Odd O.
name: Stensrud, Mats J.
name: Didelez, Vanessa
name: Daniel, Rhian
name: Røysland, Kjetil
name: Strohmaier, Susanne
Publisher: name: arXiv
Year: 2020
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: We discuss causal mediation analyses for survival data and propose a new approach based on the additive hazards model. The emphasis is on a dynamic point of view, that is, understanding how the direct and indirect effects develop over time. Hence, importantly, we allow for a time varying mediator. To define direct and indirect effects in such a longitudinal survival setting we take an interventional approach (Didelez (2018)) where treatment is separated into one aspect affecting the mediator and a different aspect affecting survival. In general, this leads to a version of the non-parametric g-formula (Robins (1986)). In the present paper, we demonstrate that combining the g-formula with the additive hazards model and a sequential linear model for the mediator process results in simple and interpretable expressions for direct and indirect effects in terms of relative survival as well as cumulative hazards. Our results generalise and formalise the method of dynamic path analysis (Fosen et al. (2006), Strohmaier et al. (2015)). An application to data from a clinical trial on blood pressure medication is given.
A more realistic holographic model of color superconductivity with the higher derivative corrections
Creators: name: Nam, Cao H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper, we have constructed a bottom-up holographic model for the color superconductivity (CSC) of the Yang-Mills theory with including the higher derivative corrections which allow to study the CSC phase with the color number $N_c\geq2$. First, we consider the CSC phase transition in the context of Einstein-Gauss-Bonnet (EGB) gravity. We analyze the Cooper pair condensate in the deconfinement and confinement phases which are dual to the planar GB-RN-AdS black hole and GB-AdS soliton, respectively, where the backreaction of the matter part is taken into account. By examining the breakdown of the Breitenlohner-Freedman bound in the background of the planar GB-RN-AdS black hole, we find that the positive GB coupling parameter $α>0$ leads to a lower upper bound of the color number in comparison to Einstein gravity where the CSC phase for $N_c\geq2$ is not realized. But, with the $α<0$ case it is possible to observe the Cooper pair condensate for $N_c\geq2$ with the reasonable magnitude of $α$. This is confirmed and the corresponding phase diagram is found by solving numerically the equations of motion for the gravitational system. In addition, we show that the CSC phase disappears in the confinement phase for the magnitude of $α$ below a certain value which means that beyond that value it might lead to the breakdown region of the EGB gravity in investigating the CSC phase. However, the CSC phase transition occurring with $N_c\geq2$ requires the magnitude of the GB coupling parameter to be rather large. As a result, the GB term would no longer be considered as the correction and it also violates the boundary causality bound. We resolve this problem by including additionally the higher derivative correction for the Maxwell electrodynamics and the non-minimal coupled Maxwell field.
description: 29 pages, 21 figures, title changed, new section (Sec. IV) added, references updated, version published in PRD
Common Proper Motion Search for Faint Companions Around Early-Type Field Stars - Progress Report - II
Creators: name: Ivanov, Valentin D.
name: Nuernberger, D.
name: Chauvin, G.
name: Foellmi, C.
name: Hartung, M.
name: Huelamo, N.
name: Melo, C.
name: Sterzik, M.
name: Haubois, X.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The multiplicity of early-type stars is still not well established. The studies of individual star forming regions suggest a connection with the age and the environment. To fill in this gap, we started the first detailed adaptive-optic-assisted imaging survey of 308 BA-type field stars within 300 pc from the Sun, to derive their multiplicity in a homogeneous way. Our first epoch observations yield 195 companion candidates around 117 sample targets. The second epoch observations are underway.
description: in "Visions for Infrared Astronomy - A tribute to Pierre Lena", held in 20-22 March 2006 in Paris, France; 4 pages
Consumer Concerns about Nutrition: Opportunities for the Food Sector
Creators: name: Frazão, Elizabeth
name: Frazão, Elizabeth
Publisher: name: Unknown
Year: 1994
Subjects: subject: Agricultural and Food Policy
subject: Food Consumption/Nutrition/Food Safety
subject: Marketing
subject: FOS: Economics and business
subject: Research and Development/Tech Change/Emerging Technologies
subject: Nutrition
subject: diet-health awareness
subject: food consumption patterns
subject: nutrition labeling
subject: new food products
subject: food marketing
subject: food manufacturing

description: The growing evidence of the link between diet and health has not been lost among consumers in the United States. As awareness of the diet-health link has increased, consumers have changed their diets. Although there is still considerable room for improvement in meeting Federal food-guidance recommendations, nutrition concerns have become an important factor in food choices. Both the food sector and the Federal Government have responded to consumer concerns about nutrition through improvements in the nutrient profile of food products and improved information on food labels. Technological advances in food processing have given the food industry new tools that are likely to accelerate the introduction of tasty healthier foods. Changes in what, where, and how food products are produced present unlimited opportunities for domestic and foreign producers and food manufacturers who can identify, respond to, or create new consumer food desires.
On entropy production of repeated quantum measurements II. Examples
Creators: name: Benoist, Tristan
name: Cuneo, Noé
name: Jakšić, Vojkan
name: Pillet, Claude-Alain
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: Dynamical Systems (math.DS)
subject: Probability (math.PR)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We illustrate the mathematical theory of entropy production in repeated quantum measurement processes developed in a previous work by studying examples of quantum instruments displaying various interesting phenomena and singularities. We emphasize the role of the thermodynamic formalism, and give many examples of quantum instruments whose resulting probability measures on the space of infinite sequences of outcomes (shift space) do not have the (weak) Gibbs property. We also discuss physically relevant examples where the entropy production rate satisfies a large deviation principle but fails to obey the central limit theorem and the fluctuation-dissipation theorem. Throughout the analysis, we explore the connections with other, a priori unrelated topics like functions of Markov chains, hidden Markov models, matrix products and number theory.
[Notes from class and on analysis]
Creators: name: Hinton, Leanne
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2020
Subjects: Chalcatongo de Hidalgo Mixtec language

description: Loose dated pages numbered 1-245 (with some unnumbered) formerly kept in binder. Original handwritten notes by Hinton from class and on analysis outside of class. Includes photocopies of some student notes incorporated into the numbering system.
Oblique Hanle Effect in Semiconductor Spin Transport Devices
Creators: name: Li, Jing
name: Huang, Biqin
name: Appelbaum, Ian
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Spin precession and dephasing ("Hanle effect") provides an unambiguous means to establish the presence of spin transport in semiconductors. We compare theoretical modeling with experimental data from drift-dominated silicon spin-transport devices, illustrating the non-trivial consequences of employing oblique magnetic fields (due to misalignment or intentional, fixed in-plane field components) to measure the effects of spin precession. Model results are also calculated for Hanle measurements under conditions of diffusion-dominated transport, revealing an expected Hanle peak-widening effect induced by the presence of fixed in-plane magnetic bias fields.
Social-VRNN: One-Shot Multi-modal Trajectory Prediction for Interacting Pedestrians
Creators: name: Brito, Bruno
name: Zhu, Hai
name: Pan, Wei
name: Alonso-Mora, Javier
Publisher: name: arXiv
Year: 2020
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Prediction of human motions is key for safe navigation of autonomous robots among humans. In cluttered environments, several motion hypotheses may exist for a pedestrian, due to its interactions with the environment and other pedestrians. Previous works for estimating multiple motion hypotheses require a large number of samples which limits their applicability in real-time motion planning. In this paper, we present a variational learning approach for interaction-aware and multi-modal trajectory prediction based on deep generative neural networks. Our approach can achieve faster convergence and requires significantly fewer samples comparing to state-of-the-art methods. Experimental results on real and simulation data show that our model can effectively learn to infer different trajectories. We compare our method with three baseline approaches and present performance results demonstrating that our generative model can achieve higher accuracy for trajectory prediction by producing diverse trajectories.
description: Accepted, 12 pages, 4 figures
Evaluating the effect of the 1980 trawl ban in the Java Sea, Indonesia
Creators: name: Buchary, Eny
Publisher: name: University of British Columbia
Year: 2009

description: Trawl fishing was banned in Indonesia in 1980 (except in the Arafura Sea) due to resource access conflicts between trawl operators and small-scale artisanal fishers. Recently, however, the new Indonesian government opened a debate on trawl ban revocation. This research evaluates the effect of the 1980 trawl ban on the sustainability of Java Sea fisheries, using an ecosystem approach. Three approaches were used. The first was to construct an Ecopath model for the Java Sea prior to the ban, to get a snap-shot picture of the ecosystem before fishery development escalated. The second used Ecosim, a dynamic multispecies model, to project the pre-ban model forward for 50 years. Ecosystem dynamics were examined in light of four hypothetical scenarios. The third approach employed an economic impact analysis to evaluate the economic implications of a trawl ban revocation. Results showed that the Java Sea in mid-1970s was a moderately mature and stable ecosystem, thus relatively resilient to perturbations. Various scenarios that were simulated suggested that the Java Sea was resilient enough to absorb perturbations, mainly by creating alternative stable states. However, these alternative stable states involved the loss of at least some parts of the initial food web structure. In all cases, this involved the increase of economically low-value species at the cost of the loss of economically high-value species. Economic impact analysis predicted some short-term gains by opting for the trawl ban revocation. In the long term, however, this revocation would create a greater impact on ecosystem integrity, and further reduce the economic viability of the already highlyexploited fishery. The major conclusion is that the trawl ban has not so far been able to provide enough opportunity for most of the heavily impacted fished groups to recover. The failure to recover is partly due to the concurrent and continual increase of fishing pressure from purse seiners and small scale gears. Therefore, a revocation of the trawl ban is not recommended.
Dual simulation of a Polyakov loop model at finite baryon density: phase diagram and local observables
Creators: name: Borisenko, Oleg
name: Chelnokov, Volodymyr
name: Mendicelli, Emanuele
name: Papa, Alessandro
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Many Polyakov loop models can be written in a dual formulation which is free of sign problem even when a non-vanishing baryon chemical potential is introduced in the action. Here, results of numerical simulations of a dual representation of one such effective Polyakov loop model at finite baryon density are presented. We compute various local observables such as energy density, baryon density, quark condensate and describe in details the phase diagram of the model. The regions of the first order phase transition and the crossover, as well as the line of the second order phase transition, are established. We also compute several correlation functions of the Polyakov loops.
description: 26 pages, 13 figures, 3 tables; added some text and six references, improved fig.7, version to appear on Nucl. Phys. B
`Hidden' Symmetries of Higher Dimensional Rotating Black Holes
Creators: name: Frolov, Valeri P.
name: Kubiznak, David
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: We demonstrate that the rotating black holes in an arbitrary number of dimensions and without any restrictions on their rotation parameters possess the same `hidden' symmetry as the 4-dimensional Kerr metric. Namely, besides the spacetime symmetries generated by the Killing vectors they also admit the (antisymmetric) Killing-Yano and symmetric Killing tensors.
description: 4 pages, slightly extended introduction
Reference-less complex wavefields characterization with a high-resolution wavefront sensor
Creators: name: Wu, Tengfei
name: Berto, Pascal
name: Guillon, Marc
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Wavefront sensing is a widely-used non-interferometric, single-shot, and quantitative technique providing the spatial-phase of a beam. The phase is obtained by integrating the measured wavefront gradient. Complex and random wavefields intrinsically contain a high density of singular phase structures (optical vortices) associated with non-conservative gradients making this integration step especially delicate. Here, using a high-resolution wavefront sensor, we demonstrate experimentally a systematic approach for achieving the complete and quantitative reconstruction of complex wavefronts. Based on the Stokes' theorem, we propose an image segmentation algorithm to provide an accurate determination of the charge and location of optical vortices. This technique is expected to benefit to several fields requiring complex media characterization.
description: 7 pages
Non-axisymmetric instabilities in shocked adiabatic accretion flows
Creators: name: Gu, Wei-Min
name: Lu, Ju-Fu
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate the linear stability of a shocked accretion flow onto a black hole in the adiabatic limit. Our linear analyses and numerical calculations show that, despite the post-shock deceleration, the shock is generally unstable to non-axisymmetric perturbations. The simulation results of Molteni, Tóth & Kuznetsov can be well explained by our linear eigenmodes. The mechanism of this instability is confirmed to be based on the cycle of acoustic waves between the corotation radius and the shock. We obtain an analytical formula to calculate the oscillation period from the physical parameters of the flow. We argue that the quasi-periodic oscillation should be a common phenomenon in accretion flows with angular momentum.
description: 14 pages, 7 figures, accepted for publication in MNRAS
A thermodynamic approach to the fragility of glass-forming polymers
Creators: name: Cangialosi, D.
name: Alegria, A.
name: Colmenero, J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We have connected the dynamic fragility, namely the rapidity of the relaxation time increase upon temperature reduction, to the excess entropy and heat capacity of a large number of glass-forming polymers. The connection was obtained in a natural way from the Adam-Gibbs equation, relating the structural relaxation time to the configurational entropy. We find a clear correlation for a group of polymers. For another group of polymers, for which this correlation does not work, we emphasise the role of relaxation processes unrelated to the  process in affecting macroscopic thermodynamic properties. Once an essentially temperature independent contribution of these processes is removed from the total excess entropy, the correlation between dynamic fragility and thermodynamic properties is re-established.
description: 14 pages, 2 figures, 1 table. Submitted to J. Chem. Phys
[Mixtec 2 field notes]
Creators: name: Macaulay, Monica
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2020
Subjects: Chalcatongo de Hidalgo Mixtec language

description: Typed version in associated item in this collection. See pages 1-18 of Macaulay.010 for remainder of field notes from this course that pick up where this notebook leaves off.