cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
An Integrated Approach Enabling Cross-Domain Simulation of Model-Based E/E-Architectures
Creators: name: Bucher, Harald
name: Reichmann, Clemens
name: Becker, Jürgen
Publisher: name: Karlsruhe
Year: 2017

description: The increasing complexity of electric/electronic architectures (EEA) in the automotive domain raised the necessity of model-based development processes for the design of such heterogeneous systems, which combine different engineering principles with different viewpoints. High-level simulation is a great means to evaluate the EEA in the concept phase of the design, since it reduces costly real-world experiments. However, model-based EEA design and analysis as well as its simulation are often separate processes in the development lifecycle. In this paper, we present a novel approach that extends state-of-the-art model-based systems engineering principles of EEA by a behavior specification reusing library components. The specification is seamlessly integrated in the development process of a single source EEA model. Therewith, the starting point is the abstract logical function architecture of the EEA. Based on this single source EEA model we synthesize a unified high-level simulation model, which is capable of linking the behavioral model with lower level implementation details of other domains, e.g. the network communication of the underlying hardware topology. This cross-layer simulation enables an early but holistic system’s behavior analysis of the dynamic changes which typically depend on the scenarios applied. Moreover, the integrated approach enables the potential to feedback the simulation results into suitable EEA metrics and benchmarks for further analysis and optimization as well as the seamless traceability of the behavioral specification to requirements and other abstraction layers. A driver assistance system use case demonstrates the proof-of-concept and the benefits of our methodology.
Dynamic Object Tracking for Quadruped Manipulator with Spherical Image-Based Approach
Creators: name: Zhang, Tianlin
name: Guo, Sikai
name: Xiong, Xiaogang
name: Li, Wanlei
name: Qi, Zezheng
name: Lou, Yunjiang
Publisher: name: arXiv
Year: 2023
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Exactly estimating and tracking the motion of surrounding dynamic objects is one of important tasks for the autonomy of a quadruped manipulator. However, with only an onboard RGB camera, it is still a challenging work for a quadruped manipulator to track the motion of a dynamic object moving with unknown and changing velocities. To address this problem, this manuscript proposes a novel image-based visual servoing (IBVS) approach consisting of three elements: a spherical projection model, a robust super-twisting observer, and a model predictive controller (MPC). The spherical projection model decouples the visual error of the dynamic target into linear and angular ones. Then, with the presence of the visual error, the robustness of the observer is exploited to estimate the unknown and changing velocities of the dynamic target without depth estimation. Finally, the estimated velocity is fed into the model predictive controller (MPC) to generate joint torques for the quadruped manipulator to track the motion of the dynamical target. The proposed approach is validated through hardware experiments and the experimental results illustrate the approach's effectiveness in improving the autonomy of the quadruped manipulator.
The chemistry and analysis of sphingolipids in natural products
Creators: name: George, Edwin Ernest
Publisher: name: University Of Tasmania
Year: 2023

description: Methods used for the analysis of both synthetic and natural sphingolipids and their components are described. Analytical data is given on ceramides derived from bovine-brain cerebrosides, and on the sphingolipids derived from milk from a predominantly Fresian herd. The major fatty acids in brain sphingolipids are 24:0, h24:0, 22:0, h22:0, 18:0 and h18:0; 24:1 is a less major component in brain cerebrosides, but a major component in brain sphingomyelin. The milk sphingolipids comprise mainly sphingomyelin, ceramide glucoside, and ceramide lactoside. All three sphingolipids contain both non-hydroxy and hydroxy fatty acids, and their compositions are similar; 23:0, 24:0, 22:0 and 16:0 (and the corresponding hydroxy fatty acids) predominate, with 16:0 (or h16:0) and 24:1 (or h24:1) present to a lesser degree. The separation of diastereoisomeric ceramides by TLC on borate-impregnated silica gel, and by GLC, is described. Synthetic ceramides are prepared for this work by direct coupling of long chain base and fatty acid in the presence of a carbodiimide. Side-reaction products produced by this method are analysed, accounting for previously unknown TLC spots present in the crude preparations. Finally the analysis of human serum lipids by spectrodensitometry using phosphomolybdic acid is described. The methods are applied to serums obtained from 68 apparently healthy adults, and quantitative results given for ceramides, monoglycerides, and cholesterol (free and total).
Orbit spaces of free involutions on the product of two projective spaces
Creators: name: Singh, Mahender
Publisher: name: arXiv
Year: 2010
Subjects: subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 57S17; 55R20; 55M20

description: Let $X$ be a finitistic space having the mod 2 cohomology algebra of the product of two projective spaces. We study free involutions on $X$ and determine the possible mod 2 cohomology algebra of orbit space of any free involution, using the Leray spectral sequence associated to the Borel fibration $X \hookrightarrow X_{\mathbb{Z}_2} \longrightarrow B_{\mathbb{Z}_2}$. We also give an application of our result to show that if $X$ has the mod 2 cohomology algebra of the product of two real projective spaces (respectively complex projective spaces), then there does not exist any $\mathbb{Z}_2$-equivariant map from $\mathbb{S}^k \to X$ for $k \geq 2$ (respectively $k \geq 3$), where $\mathbb{S}^k$ is equipped with the antipodal involution.
description: 14 pages, to appear in Results in Mathematics
Exploring the active galactic nucleus and starburst content of local ultraluminous infrared galaxies through 5-8 micron spectroscopy
Creators: name: Nardini, E.
name: Risaliti, G.
name: Salvati, M.
name: Sani, E.
name: Watabe, Y.
name: Marconi, A.
name: Maiolino, R.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present a 5-8 micron analysis of the Spitzer-IRS spectra of 71 ultraluminous infrared galaxies (ULIRGs) with redshift z < 0.15, devoted to the study of the role of active galactic nuclei (AGN) and starbursts (SB) as the power source of the extreme infrared emission. Around 5 micron an AGN is much brighter (by a factor 30) than a starburst of equal bolometric luminosity. This allows us to detect the presence of even faint accretion-driven cores inside ULIRGs: signatures of AGN activity are found in 70 per cent of our sample (50/71 sources). Through a simple analytical model we are also able to obtain a quantitative estimate of the AGN/SB contribution to the overall energy output of each source. Although the main fraction of ULIRG luminosity is confirmed to arise from star formation events, the AGN contribution is non-negligible (23 per cent) and is shown to increase with luminosity. The existence of a rather heterogeneous pattern in the composition and geometrical structure of the dust among ULIRGs is newly supported by the comparison between individual absorption features and continuum extinction.
description: 56 pages, 13 figures, 4 tables. Accepted for publication in MNRAS
The super-LHC
Creators: name: Mangano, Michelangelo L.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Theory (hep-th)
subject: Accelerator Physics (physics.acc-ph)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We review here the prospects of a long-term upgrade programme for the Large Hadron Collider (LHC), CERN laboratory's new proton-proton collider. The super-LHC, which is currently under evaluation and design, is expected to deliver of the order of ten times the statistics of the LHC. In addition to a non-technical summary of the principal physics arguments for the upgrade, I present a pedagogical introduction to the technological challenges on the accelerator and experimental fronts, and a review of the current status of the planning.
description: To appear in Contemporary Physics
Maps of several variables of finite total variation and Helly-type selection principles
Creators: name: Chistyakov, Vyacheslav V.
name: Tretyachenko, Yuliya V.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 26B30 (Primary), 20M15, 28A20 (Secondary)

description: Given a map from a rectangle in the n-dimensional real Euclidean space into a metric semigroup, we introduce a concept of the total variation, which generalizes a similar concept due to T. H. Hildebrandt (1963) for real functions of two variables and A. S. Leonov (1998) for real functions of n variables, and study its properties. We show that the total variation has many classical properties of Jordan's variation such as the additivity, generalized triangle inequality and sequential lower semicontinuity. We prove two variants of a pointwise selection principle of Helly-type, one of which is as follows: a pointwise precompact sequence of metric semigroup valued maps on the rectangle, whose total variations are uniformly bounded, admits a pointwise convergent subsequence.
description: 47 pages, LaTeX, uses elsarticle.sty
Unraveling Cosmological Anisotropies within Stochastic Gravitational Wave Backgrounds
Creators: name: Cui, Yanou
name: Kumar, Soubhik
name: Sundrum, Raman
name: Tsai, Yuhsin
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Identifying the anisotropies in a cosmologically sourced stochastic gravitational wave background (SGWB) would be of significance in shedding light on the nature of primordial inhomogeneities. For example, if SGWB carries isocurvature fluctuations, it would provide evidence for a multi-field inflationary origin of these inhomogeneities. However, this is challenging in practice due to finite detector sensitivity and also the presence of the astrophysical foregrounds that can compete with the cosmological signal. In this work, we explore the prospects for measuring cosmological SGWB anisotropies in the presence of an astrophysical counterpart and detector noise. To illustrate the main idea, we perform a Fisher analysis using a well-motivated cosmological SGWB template corresponding to a first order phase transition, and an astrophysical SGWB template corresponding to extra-galactic binary mergers, and compute the uncertainty with which various parameters characterizing the isotropic and anisotropic components can be extracted. We also discuss some subtleties and caveats involving shot noise in the astrophysical foreground. Overall, we show that upcoming experiments, e.g., LISA, Taiji, Einstein Telescope, Cosmic Explorer, and BBO, can all be effective in discovering plausible anisotropic cosmological SGWBs.
description: 24 pages, 9 figures
Analytical obtention of eigen-energies for lens-shaped quantum dot with finite barriers
Creators: name: Rodríguez, Arezky H.
name: Ramírez, Hanz Y.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The bound states of a particle in a lens-shaped quantum dot with finite confinement potential are obtained in the envelope function approximation. The quantum dot has circular base with radius $a$ and maximum cap height $b$, and the effective mass of the particle is considered different inside and outside the dot. A 2D Fourier expansion is used in a semi-sphere domain with infinite walls which contains the geometry of the original potential. Electron energies for different values of lens deformation $b/a$, lens radius $a$ and barrier height $V_o$ are calculated. In the very high confinement potential limit, the results for the infinite barrier case are recovered.
description: 5 pages, 3 figures, accepted for publication in The European Physical Journal B
Correlations in a band insulator
Creators: name: Sentef, Michael
name: Kunes, Jan
name: Werner, Philipp
name: Kampf, Arno P.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study a model of a covalent band insulator with on-site Coulomb repulsion at half-filling using dynamical mean-field theory. Upon increasing the interaction strength the system undergoes a discontinuous transition from a correlated band insulator to a Mott insulator with hysteretic behavior at low temperatures. Increasing the temperature in the band insulator close to the insulator-insulator transition we find a crossover to a Mott insulator at elevated temperatures. Remarkably, correlations decrease the energy gap in the correlated band insulator. The gap renormalization can be traced to the low-frequency behavior of the self-energy, analogously to the quasiparticle renormalization in a Fermi liquid. While the uncorrelated band insulator is characterized by a single gap for both charge and spin excitations, the spin gap is smaller than the charge gap in the correlated system.
description: 7 pages, 7 figures
Heavy QCD axion model in light of pulsar timing arrays
Creators: name: Ahmadvand, Moslem
name: Bian, Ligong
name: Shakeri, Soroush
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Recently, pulsar timing array experiments reported the observation of a stochastic gravitational wave background in the nanohertz range frequency band. We show that such a signal can be originated from a cosmological first-order phase transition (PT) within a well-motivated heavy (visible) QCD axion model. Considering the Peccei-Quinn symmetry breaking at the TeV scale in the scenario, we find a supercooled PT, in the parameter space of the model, prolonging the PT with the reheating temperature at the GeV scale.
description: v2: 8 pages, 4 figures, new discussions and references added
Additional file 1 of Homotypic cell membrane-cloaked biomimetic nanocarrier for the accurate photothermal-chemotherapy treatment of recurrent hepatocellular carcinoma
Creators: name: Sun, Yingxue
name: Zhai, Wenhui
name: Liu, Xiaojun
name: Song, Xiangyi
name: Gao, Xiaonan
name: Xu, Kehua
name: Tang, Bo
Publisher: name: figshare
Year: 2020
Subjects: Molecular Biology
Pharmacology
Biotechnology
Chemical Sciences not elsewhere classified
Biological Sciences not elsewhere classified
Cancer

description: Additional file 1: Figure S1. TEM image of HepG2 cell membrane(a) and the ruptured liposome after the laser irradiated (b). DLS of the TSL (c), HepM-TSL (d), HepG2 cell membrane vesicles (e). Figure S2. (A) to (E) Targeting ability of HepM-TSL to HepG2 cells, BGC-823 cells, HeLa cells, and MCF-7 cell verified by flow cytometry. (F) Quantitative fluorescence intensities of results in (A) to (E). (G) Fluorescence images of HepG2 cells, BGC-823 cells, HeLa cells, and MCF-7 cell obtained with flow cytometry. Figure S3. The targeting ability of HepM-TSL to HepG2 cells and other cancer cells. (A) Fluorescence images of HepG2 cells, BGC-823 cells, HeLa cells and MCF-7 cells incubated with ICG-Dox-HepM-TSL nanoparticles. (B) Quantitative histograms of the Dox fluorescence intensities in (A). (C) Quantitative histograms of the ICG fluorescence intensities in (A). Scale bar: 75 μm. Figure S4. Dox and ICG loading content standard curve Dox concentration of 41.32 μg/mL. ICG concentration of 34.83 μg/mg. Figure S5. Schematic diagram of in vivo experiments. Figure S6. Hemolysis effect of the ICG-Dox-HepM-TSL, ICG-Dox-TSL, ICG, Dox and Tween 80.
Multi-Robot Multi-Room Exploration with Geometric Cue Extraction and Circular Decomposition
Creators: name: Kim, Seungchan
name: Corah, Micah
name: Keller, John
name: Best, Graeme
name: Scherer, Sebastian
Publisher: name: arXiv
Year: 2023
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: This work proposes an autonomous multi-robot exploration pipeline that coordinates the behaviors of robots in an indoor environment composed of multiple rooms. Contrary to simple frontier-based exploration approaches, we aim to enable robots to methodically explore and observe an unknown set of rooms in a structured building, keeping track of which rooms are already explored and sharing this information among robots to coordinate their behaviors in a distributed manner. To this end, we propose (1) a geometric cue extraction method that processes 3D point cloud data and detects the locations of potential cues such as doors and rooms, (2) a circular decomposition for free spaces used for target assignment. Using these two components, our pipeline effectively assigns tasks among robots, and enables a methodical exploration of rooms. We evaluate the performance of our pipeline using a team of up to 3 aerial robots, and show that our method outperforms the baseline by 33.4% in simulation and 26.4% in real-world experiments.
MOESM5 of Inter-site harmonization based on dual generative adversarial networks for diffusion tensor imaging: application to neonatal white matter development
Creators: name: Zhong, Jie
name: Wang, Ying
name: Li, Jie
name: Xue, Xuetong
name: Liu, Simin
name: Wang, Miaomiao
name: Gao, Xinbo
name: Wang, Quan
name: Yang, Jian
name: Li, Xianjun
Publisher: name: figshare
Year: 2020
Subjects: subject: Space Science
subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Evolutionary Biology
subject: Ecology
subject: Biological Sciences not elsewhere classified
subject: Information Systems not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Developmental Biology
subject: Hematology
subject: Computational Biology

description: Additional file 5: Figure S4. Evaluation of the harmonization by Dual GANs (axial) on the fractional anisotropy (FA) metric of 3 sites. Dual GANs (axial) indicates the harmonization performed by using dual generative adversarial networks with the 2 dimensional kernel on axial slices. The ComBat method is used to generate the simulated data in a third domain different from site 1 or site 2 (as shown in the following Figure A and C). FA maps of the site 3 are the simulated data by transforming the data of site 1 to the third domain. For inter-site comparisons after harmonization, differences with P < 0.05 in any run of the sixfold cross-validation are overlaid together on the template map.
Efficient Reduced Order Quadrature Construction Algorithms for Fast Gravitational Wave Inference
Creators: name: Morras, Gonzalo
name: Siles, Jose Francisco Nuno
name: Garcia-Bellido, Juan
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Reduced Order Quadrature (ROQ) methods can greatly reduce the computational cost of Gravitational Wave (GW) likelihood evaluations, and therefore greatly speed up parameter estimation analyses, which is a vital part to maximize the science output of advanced GW detectors. In this paper, we do an in-depth study of ROQ techniques applied to GW data analysis and present novel algorithms to enhance different aspects of the ROQ bases construction. We improve upon previous ROQ construction algorithms allowing for more efficient bases in regions of parameter space that were previously challenging. In particular, we use singular value decomposition (SVD) methods to characterize the waveform space and choose a reduced order basis close to optimal and also propose improved methods for empirical interpolation node selection, greatly reducing the error added by the empirical interpolation model. To demonstrate the effectiveness of our algorithms, we construct multiple ROQ bases ranging in duration from 4s to 256s for compact binary coalescence (CBC) waveforms including precession and higher order modes. We validate these bases by performing likelihood error tests and P-P tests and explore the speed up they induce both theoretically and empirically with positive results. Furthermore, we conduct end-to-end parameter estimation analyses on several confirmed GW events, showing the validity of our approach in real GW data.
description: 21 pages, 9 figures
The legal injury narrative : personal injury litigation and melodrama
Creators: name: Hardy, SJ
Publisher: name: University Of Tasmania
Year: 2023

description: This thesis attempts to explain why personal injury plaintiffs tend to have poorer health outcomes than non-litigants with similar injuries. It examines the role that injured plaintiffs have to play in the litigation. The thesis develops the concept of the \legal injury narrative\" and argues that plaintiffs are required to tell their individual stories in accordance with this master narrative in order to be successful in their claims. The legal injury narrative is analysed through the genre of melodrama. This reveals that the role injured plaintiffs are required to play in the narrative is a passive mute and dependent one and this has negative ramifications for their health outcomes. Examining the legal injury narrative in this way also reveals some concerning consequences for society as a whole particularly the way in which society responds to suffering and how normative assumptions in the law can perpetuate existings power hierarchies and gender stereotypes. Mediation is considered as a possible alternative to litigation. It seems particularly useful as a way of supporting injured people and enabling them to tell their stories according to a tragic genre which it is argued is more conducive to improved health outcomes. In particular it is argued that mediation as a future directed procedure is preferable to the legal injury narrative's current focus on past events and restoring the status quo."
Benefits of Open Quantum Systems for Quantum Machine Learning
Creators: name: Olivera-Atencio, María Laura
name: Lamata, Lucas
name: Casado-Pascual, Jesús
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum machine learning is a discipline that holds the promise of revolutionizing data processing and problem-solving. However, dissipation and noise arising from the coupling with the environment are commonly perceived as major obstacles to its practical exploitation, as they impact the coherence and performance of the utilized quantum devices. Significant efforts have been dedicated to mitigate and control their negative effects on these devices. This Perspective takes a different approach, aiming to harness the potential of noise and dissipation instead of combatting them. Surprisingly, it is shown that these seemingly detrimental factors can provide substantial advantages in the operation of quantum machine learning algorithms under certain circumstances. Exploring and understanding the implications of adapting quantum machine learning algorithms to open quantum systems opens up pathways for devising strategies that effectively leverage noise and dissipation. The recent works analyzed in this Perspective represent only initial steps towards uncovering other potential hidden benefits that dissipation and noise may offer. As exploration in this field continues, significant discoveries are anticipated that could reshape the future of quantum computing.
description: 13 pages, 3 figures
Characteristics of light reflected from a dense ionization wave with a tunable velocity
Creators: name: Zhidkov, A.
name: Esirkepov, T.
name: Fujii, T.
name: Nemoto, K.
name: Koga, J.
name: Bulanov, S. V.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: An optically-dense ionization wave (IW) produced by two femtosecond laser pulses focused cylindrically and crossing each other is shown to be an efficient coherent x-ray converter. The resulting velocity of a quasi-plane IW in the vicinity of pulse intersection increases with the angle between the pulses from the group velocity of ionizing pulses to infinity allowing an easy tuning the wavelength of x-rays. The x-ray spectra of a converted, lower frequency coherent light change from the monochromatic to a high order harmonic-like with the duration of ionizing pulses and the intensity of scattered pulses; the spectrum are not symmetrical at Vc.
Modified particle lifetimes as a signature of deformed relativity
Creators: name: Morais, Pedro H.
name: Lobo, Iarley P.
name: Pfeifer, Christian
name: Batista, Rafael Alves
name: Bezerra, Valdir B.
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We demonstrate a compatibility between the relativity principle and the clock postulate in deformed special relativity, by identifying the relevant deformed Lorentz transformations in position space between arbitrary frames. This result leads to a first-principles correction to the dilated lifetime of fundamental particles. It turns out that these modified time dilations offer a way to scrutinize Lorentz invariance (or deviations thereof) to high precision.
description: 5 pages. Acknowledgments added. Matches published version
Properties and Applications of Andalusite Based Refractories and the Influence of Mineral Impurities on the Behaviour of Refractories Made Thereof
Creators: name: Moehmel, Steffen
name: Frulli, Danilo
name: Ahouanto, Florian
name: van den Heever, Dirk
Publisher: name: Zenodo
Year: 2016
Subjects: Andalusite
Impurity
raw material
refractory
thermo-mechanical properties

description: Andalusite is a natural mineral widely used as raw material for different applications. Due to its very specific properties andalusite is also very attractive as aggregate for refractory castables and bricks. It is well known that andalusite based refractories exhibit a high volume and thermal stability, high density and a particularly high thermal shock resistance. Neverthe­less, the performances of refractories, based on this alumino-silicate depend – besides others – on the chemical composition which in turn is mainly influ­enced by the amount and type of accompanying miner­als (depending on the deposits) and the thoroughness as well as the method of processing (e.g. magnetic separation, heavy media separation, floatation, electrostatic separation). This paper presents the results of a study comparing the performance of different types of andalusite raw materials. A broad range of andalusite was characterised regarding chemical and mineralogical composition as well as dilatometry and heating microscopy. Specific attention was given to the distribution of impurities across the different size fractions. Refractory bricks and castables were produced from each type of andalusite in a laboratory scale in order to establish a correlation between the raw material purity and the refractory performance. Thermo-mechanical properties such as refrac­toriness under load and creep resistance were investi­gated, with a particular focus on the impact of impurity level, its enrichment in the matrix and its influence on the microstructure.
Topologically Charged Rotating Wormhole
Creators: name: Ahmed, Faizuddin
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this article, we present a stationary metric ansatz to describe a rotating traversable wormhole in the presence of the topological defect produced by a global monopole charge. This particular rotating space-time is referred to as the topologically charged rotating Schwarzschild-Klinkahmer wormhole. Our study involves the analysis of geodesic motion for test particles and photon rays in the context of this topologically charged rotating traversable wormhole. We aim to analyze the effects of global monopole charge and other parameters on the outcomes of this investigation. Additionally, we explore the matter-energy distribution within this rotating wormhole, considering it as a non-vacuum solution of Einstein's field equation. Notably, we demonstrate that the energy density of the matter content satisfies the criteria of the weak energy condition.
description: 14 pages; 4 figures, published in Acta Phys. Pol. B (https://doi.org/10.5506/APhysPolB.54.11-A3)
Few-Body Systems and the Pionless Effective Field Theory
Creators: name: Platter, Lucas
Publisher: name: arXiv
Year: 2009
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The pionless effective field theory (EFT) is the appropriate low-energy EFT for short-range interactions that display a large scattering length. It has been successfully applied in atomic, nuclear and particle physics. We give an overview over recent calculations employing the pionless effective field theory and lay emphasis on applications in the three- and four-body sector where the most exciting developments have occurred.
description: 8 pages, 2 figures, talk given at 6th International Workshop on Chiral Dynamics, Bern, Switzerland, July 6-10, 2009
Application of neural network classifers to electrocardiographic body surface mapping
Creators: name: Freeman, Timothy William
Publisher: name: University Of Tasmania
Year: 2023

description: This thesis examines the capabilities of artificial neural networks for classifying electrocardiographic body surface mapping data. In particular it examines the diagnostic detection of myocardial infarctions and coronary artery disease. An overview of patten recognition, neural networks, electrocardiography, and electrocardiographic body surface mapping is presented followed by a detailed description of the experiments and analysis conducted. The experimental analysis in this thesis is divided into three sections. Firstly, a range of feed-forward artificial neural network architectures and training techniques are used to classify the body surface mapping data with the aim of identifying patients with myocardial infarctions, coronary artery disease, and normal heart function. In this initial study a number of pre-processing techniques are also explored. Secondly, a range of traditional classification techniques (linear regression, k-nearest-neighbour, and inductive learning) are applied to the same problems and compared with the neural network results. When classifying myocardial infarction it was found that artificial neural networks perform as well but no better than traditional classification techniques. This outcome provides some interesting insights into the nature of the classification problem and the information content of body surface maps. However, attempting to separate patients with coronary artery disease from patients with normal heart function neural networks were found to perform much better than traditional classification techniques. The third experimental section examines the bayesian equivalence of neural network outputs and how these probabilistic properties may be used to deal with diagnostic uncertainty. Apart from examining the theoretical connection between network outputs and a posteriori probabilities, a number of experiments are conducted to show how this information can be used to provide the physician with some important information about the classification certainty.
Magnetic particle hyperthermia: Neel relaxation in magnetic nanoparticles under circularly polarized field
Creators: name: de Chatel, P. F.
name: Nandori, I.
name: Hakl, J.
name: Meszaros, S.
name: Vad, K.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The mechanism of magnetization reversal in single-domain ferromagnetic particles is of interest in many applications, in most of which losses must be minimized. In cancer therapy by hyperthermia the opposite requirement prevails: the specific loss power should be maximized. Of the mechanisms of dissipation, here we study the effect of Neel relaxation on magnetic nanoparticles unable to move or rotate and compare the losses in linearly and circularly polarized field. We present exact analytical solutions of the Landau-Lifshitz equation as derived from the Gilbert equation and use the calculated time-dependent magnetizations to find the energy loss per cycle. In frequencies lower than the Larmor frequency linear polarization is found to be the better source of heat power, at high frequencies (beyond the Larmor frequency) circular polarization is preferable.
description: 9 pages, 2 figures, final version, published in J. Phys.: Condens. Matter
IPHAS A-type Stars with Mid-IR Excesses in Spitzer Surveys
Creators: name: Hales, Antonio S.
name: Barlow, Michael J.
name: Drew, Janet E.
name: Unruh, Yvonne C.
name: Greimel, Robert
name: Irwin, Michael J.
name: Gonzalez-Solares, Eduardo
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We have identified 17 A-type stars in the Galactic Plane that have mid-IR excesses at 8 micron. From the observed colors in the (r'-H_alpha)-(r'-i') plane, we first identified 23050 early A-type main sequence (MS) star candidates in the Isaac Newton Photometric H-Alpha Survey (IPHAS) point source database that are located in Spitzer GLIMPSE Galactic Plane fields. Imposing the requirement that they be detected in all seven 2MASS and IRAC bands led to a sample of 2692 candidate A-type stars with fully sampled 0.6 to 8 micron SEDs. Optical classification spectra of 18 of the IPHAS candidate A-type MS stars showed that all but one could be well fitted using main sequence A-type templates, with the other being an A-type supergiant. Out of the 2692 A-type candidates 17 (0.6%) were found to have 8-micron excesses above the expected photospheric values. Taking into account non-A-Type contamination estimates, the 8-micron excess fraction is adjusted to ~0.7%. The distances to these sources range from 0.7-2.5 kpc. Only 10 out of the 17 excess stars had been covered by Spitzer MIPSGAL survey fields, of which 5 had detectable excesses at 24 micron. For sources with excesses detected in at least two mid-IR wavelength bands, blackbody fits to the excess SEDs yielded temperatures ranging from 270 to 650 K, and bolometric luminosity ratios L_IR/L* from 2.2x10^{-3}-1.9x10^{-2}, with a mean value of 7.9x10^{-3} (these bolometric luminosities are lower limits as cold dust is not detectable by this survey). Both the presence of mid-IR excesses and the derived bolometric luminosity ratios are consistent with many of these systems being in the planet-building transition phase between the early protoplanetary disk phase and the later debris disk phase.
description: Accepted for publication in ApJ. 41 pages, 11 figures
Sentiment Analysis and Stock Market Prediction in China: Based on Commentary Information
Creators: name: Shen, Yucheng
Publisher: name: University of Chicago
Year: 2023

description: The fluctuation of stock prices affects various aspects of social life, and thus, effective prediction of stock market trends has significant commercial and social value. Generally, predicting future market trends depends on studying and extracting the changing patterns of historical data. In this study, based on 1000 trading days from January 2018 to December 2022 in the Chinese stock market and 6000 stock comments, we propose an LSTM model based on historical financial data and investor sentiment to predict the future trends of the Chinese A-share market index. Firstly, we extend the sentiment lexicon to fit the context of stock market and construct specific matching rules to calculate sentiment scores. Secondly, we construct an LSTM model based on financial data, and compared the prediction results with the traditional ARMA model with the same inputs, where the empirical evidence cannot support the argument that the LSTM models are superior in predicting performance. Finally, we add the sentiment index to the input layer of the LSTM model, and compare the prediction results of the new model and the basic model on the test set, fully showing the significant role of sentiment indicators in predicting market trends.
Planetesimal Accretion in Binary Systems: Role of the Companion's Orbital Inclination
Creators: name: Xie, Ji-Wei
name: Zhou, Ji-Lin
Publisher: name: arXiv
Year: 2009
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Recent observations show that planet can reside in close binary systems with stellar separation of only about 20 AU. However, planet formation in such close binary systems is a challenge to current theory. One of the major theoretical problems occurs in the intermediate stage-planetesimals accretion into planetary embryos-during which the companion's perturbations can stir up the relative velocites(dV) of planetesimals and thus slow down or even cease their growth. However, all previous studies assumed a 2-dimentional (2D) disk and a coplanar binary orbit. Extending previous studies by including a 3D gas disk and an inclined binary orbit with small relative inclination of i_B=0.1-5 deg, we numerically investigate the conditions for planetesimal accretion at 1-2 AU, an extension of the habitable zone(1-1.3 AU), around alpha Centauri A in this paper. Inclusion of the binary inclination leads to: (1) differential orbital phasing is realized in the 3D space, and thus different-sized bodies are separated from each other; (2) total impact rate becomes lower, and impacts mainly occur between similar-sized bodies; (3) accretion is more favored, but the balance between accretion and erosion remains uncertain, and the "possible accretion region" extends up to 2AU when assuming an optimistic Q*(critical specific energy that leads to catastrophic fragmentation); and (4) impact velocities (dV) are significantly reduced but still much larger than their escape velocities, which infers that planetesimals grow by means of type II runaway mode. As a conclusion, inclusion of a small binary inclination is a promising mechanism that favors accretion, opening a possibility that planet formation in close binary systems can go through the difficult stage of planetesimals accretion into planetary embryos.
description: 9 pages, 6 figures, ApJ, 698, 2066
Electronic correlations in promising room-temperature superconductor Pb$_9$Cu(PO$_4$)$_6$O: a DFT+DMFT study
Creators: name: Korotin, Dmitry M.
name: Novoselov, Dmitry Y.
name: Shorikov, Alexey O.
name: Anisimov, Vladimir I.
name: Oganov, Artem R.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present results of the first investigations on the correlated nature of electronic states that cross the Fermi level in Pb$_9$Cu(PO$_4$)$_6$O aka LK-99 obtained within the DFT + DMFT approach. Coulomb correlations between Cu-$d$ electrons led to the opening of the band gap between the extra-O $p$ and Cu $d_{xz}/d_{yz}$ states. We state that oxygen $p$ states play a significant role in the electronic properties of LK-99. We also assume that doping with electrons is necessary to turn the stoichiometric Pb$_9$Cu(PO$_4$)$_6$O into conducting state.
The control machine
Creators: name: Eddy, Samuel Peter
Publisher: name: University Of Tasmania
Year: 2023

description: Mass media, especially advertising under the guise of entertainment, continually exposes individuals to sources of controlled information. From the Control Machine we become bombarded with messages promoting consumption, profit and conformity, idealising unattainable lifestyles, and the laying down of a new social morality. The power of this immersive synthetic environment can have a powerful impact on the individual. Kathleen Taylor has commented that education and wide experience, 'allows us time to stop and think ahead, to resist temptation, and to see past immediate gratification.' But we live in an increasingly claustrophobic environment, one that immerses us, tempting and bombarding us with information, choices and desires. We are now faced with a continually redesigned visual and aural environment, one that triggers and shapes the way we act, feel and respond. This installation begins to address how the inner workings of a controlling machine might appear. To gather this understanding I have pulled apart my collected sources of stimuli emitted from everyday technological devices such as television into deceptively simple repetitious patterns of light. This stimulus visualizes the transformation of information into coded light, the initial impetus for all technological communication systems. Through these refilled pulses of light a dialogue is generated replicating certain processes of the brain. The more frequently we are exposed to a source of incoming stimuli the more it shapes the core of who we are, the way we see and understand our surroundings. Repetition is a vital tool in creating this link The Control Machine manipulates pulses of light into an abstract language that repeats and bombards; it uses the individual as the capturing and deciphering device. This electric language is reinforced by sound, which combines to interact with and to immerse the individual. Through this I examine what might be called a dystopia of language, looking behind the facade. Totalitarianism, the concentration of media ownership, the standardisation and manipulation of the individual, thought reform and environmental control are all mechanisms of designed control within our society. These mechanisms use specialised psychological triggers that can exert power from external systems. The Control Machine explores these psychological triggers as they are manifested within an entirely designed environment.
Ultraviolet number counts of galaxies from Swift UV/Optical Telescope deep imaging of the Chandra Deep Field South
Creators: name: Hoversten, E. A.
name: Gronwall, C.
name: Berk, D. E. Vanden
name: Koch, T. S.
name: Breeveld, A. A.
name: Curran, P. A.
name: Hinshaw, D. A.
name: Marshall, F. E.
name: Roming, P. W. A.
name: Siegel, M. H.
name: Still, M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Deep Swift UV/Optical Telescope (UVOT) imaging of the Chandra Deep Field South is used to measure galaxy number counts in three near ultraviolet (NUV) filters (uvw2: 1928 A, uvm2: 2246 A, uvw1: 2600 A) and the u band (3645 A). UVOT observations cover the break in the slope of the NUV number counts with greater precision than the number counts by the Hubble Space Telescope (HST) Space Telescope Imaging Spectrograph (STIS) and the Galaxy Evolution Explorer (GALEX), spanning a range from 21 < m_AB < 25. Number counts models confirm earlier investigations in favoring models with an evolving galaxy luminosity function.
description: 20 pages, 6 figures, accepted to ApJ
RFID et nouvelles technologies de communication; enjeux économiques incontournables et problèmes d'éthique RFID and new communication technologies - economic challenges and ethic problems
Creators: name: Thomas, André
Publisher: name: arXiv
Year: 2010
Subjects: subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: Auto ID technologies such RFID are more and more commonly used in industry and in distribution. Human are identify thanks to this technology, too. A lot of people have highlighted ethic problems relative to their utilization. This paper present first RFID technology, then it presents their opportunities in business and industry. In a second part, the paper highlights some ethic problems leading to a necessary standardization and regulation.
description: Keynote paper
Understanding reproduction and energy storage, for broodstock conditioning, in Mytilus galloprovincialis
Creators: name: Fearman, JA
Publisher: name: University Of Tasmania
Year: 2023

description: Synchronous seasonal reproduction in Mytilus galloprovincialis has been well documented, however asynchronous reproduction is also observed in many populations. These reproductive events occur at different times of year, and therefore under different environmental conditions. Experimental evidence regarding the influence of environmental parameters, such as temperature and food, on reproduction and energy storage in this species is limited. Therefore, this research aimed to determine the important environmental conditions that influence the timing and rate of reproductive maturation in relation to energy storage and use in mussels, which can be used for broodstock conditioning in the mussel aquaculture industry. Monthly samples of the population were collected over two years, and the timing and rate of maturation and energy storage was different between years and at different depths. Mussels used energy from food for reproduction in 2006, and used stored energy (glycogen) for reproduction in 2007. The use of these different reproductive strategies was potentially influenced by differences in temperature and food (phytoplankton concentration). Diet composition was tested for its effect on reproduction and energy storage. Mussels were able to spawn more readily when fed a combination of Chaetoceros calcitrans and Pavlova lutheri. A monospecific diet of Pavlova lutheri provided PUFAs necessary for maturation, but may have provided less energy; and Chaetoceros calcitrans provided sufficient energy, which increased glycogen storage, but may have been limited in PUFAs. The effects of temperature and ration were also tested, and the rate of maturation was fastest at 7¬¨‚àûC and reduced in warmer water, up to 19¬¨‚àûC, when held at constant temperature. When held in temperatures that mimicked seasonal temperature changes in spring, summer and autumn, mussels produced oocytes and stored energy during summer, but during autumn production of oocytes was greater and stored glycogen was depleted. Mussels fed a higher ration in this experiment allocated greater amounts of energy to storage or energy demands, but oocytes were not increased, which suggests that temperature rather than ration regulates reproductive maturation. The effects of food and temperature may be synergistic during seasonal cycles of reproduction. Reproduction appears to be prioritised over energy storage in mussels, which should result in year round reproduction in this species if energy (food or glycogen) is not a limiting factor. However warmer seasonal temperatures limit reproduction, therefore available energy is stored as glycogen. This information can be used to control the rate and timing of maturation of broodstock in a hatchery.