cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Design of an In-Situ Magnetic Particle Spectrometer (INSPECT~II) for co-precipitation methodology-based synthesis
Creators: name: Malhotra, Ankit
name: Menon, Narayan Kumar
name: Freitag, Katharina
name: Graeser, Matthias
name: M. Buzug, Thorsten
name: Lüdtke-Buzug, Kerstin
Publisher: name: International Journal on Magnetic Particle Imaging IJMPI
Year: 2023

description: Magnetic particle spectrometry (MPS) is a characterization tool, which helps in determining the magnetic properties of Magnetic nanoparticles (MNPs). MNPs heavily influence image resolution, hence intensive research is conducted to improve the magnetic properties of these MNPs. In-situ magnetic particle spectrometer (INSPECT) was first presented in 2019 and has the capability to track the nucleation and growth of MNPs. The presented research discusses the design and development of the second generation of INSPECT which investigates the impact of a fully controllable temperature bath, lower power requirements, and a new hybrid housing design for carrying out synthesis at higher temperatures. This research paper deals with the development of different hardware modules and sensitivity profiles of INSPECT II.
description: International Journal on Magnetic Particle Imaging IJMPI, Vol 9 No 1 Suppl 1 (2023)
Rips-Segev torsion-free groups without the unique product property
Creators: name: Steenbock, Markus
Publisher: name: arXiv
Year: 2013
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20F06, 20F60, 20F67, 20P05

description: We generalize the graphical small cancellation theory of Gromov to a graphical small cancellation theory over the free product. We extend Gromov's small cancellation theorem to the free product. We explain and generalize Rips-Segev's construction of torsion-free groups without the unique product property by viewing these groups as given by graphical small cancellation presentations over the free product. Our graphical small cancellation theorem then provides first examples of Gromov hyperbolic groups without the unique product property. We construct uncountably many non-isomorphic torsion-free groups without the unique product property. We show that the presentations of generalized Rips-Segev groups are not generic among finite presentations of groups.
description: Final author's version. 34 pages, 9 figures
Linear structures of magnetic nanoparticles in hyperthermia and magnetic particle imaging
Creators: name: Schoenen, Max
name: Schober, Sven
name: Bauer, Benedict
name: Mues, Benedikt
name: Gries, Thomas
name: Buhl, Eva Miriam
name: Schmitz-Rode, Thomas
name: Slabu, Ioana
Publisher: name: International Journal on Magnetic Particle Imaging IJMPI
Year: 2023

description: The development of theranostic devices combining magnetic particle imaging (MPI) and magnetic hyperthermia opens new possibilities for clinical applications of magnetic nanoparticles (MNP), e.g., hyperthermia-mediated drug delivery. Enhancing MNP performance for such applications can be achieved by using linear structures of MNP (i.e. chains, elongated clusters) instead of randomly distributed MNP. Here, we investigate the hyperthermia and MPI performance of two types of MNP linear structures: one generated by exposing MNP to a static magnetic field inside a hydrogel and the other by extruding a mixture of polypropylene and MNP to hybrid fibers. For both types of linear structures, an increase in heating efficiency and MPI signal was observed when the linear structure orientation is in the direction of the excitation field. In summary, the generation of MNP linear structures is a promising approach to increase their performance in MPI and magnetic hyperthermia. For MPI image reconstruction, the orientation of the linear structures relative to the drive field direction should be considered.
description: International Journal on Magnetic Particle Imaging IJMPI, Vol 9 No 1 Suppl 1 (2023)
title: Regulation of expression of the interleukin-2 receptor alpha chain (CD25) in human tonsillar B lymphocytes
Creators: name: Pringle, Heather Margaret
Publisher: name: University of Glasgow
Year: 1997

description: The Interleukin-2 Receptor α chain (IL-2Rα or CD25) plays an important role in B cell activation since it allows formation of the high affinity IL-2 Receptor and thus permits the B cell to respond to physiological concentrations of IL-2. IL-4 appears to be the sole cytokine which can induce IL-2Rα in human tonsillar B cells. In addition, polyvalent anti-lmmunoglobulin antibodies and anti-CD40 antibodies can cause up-regulation of IL- 2Rα (Burlinson et al 1995). However, although anti-lg, anti-CD40 and IL-4 can increase IL-2Rα expression, this elevation in IL-2Rα levels does not necessarily facilitate subsequent B cell proliferation in the presence of IL-2. Of the three, only anti-Ig antibodies, in combination with IL-2, could cause resting B cells to proliferate to a significant level. Stimulation of human tonsillar B cells with polyvalent anti-lg antibodies resulted in more than 80% of them acquiring an IL-2Rα -positive phenotype. IL-2Rα expression on different subsets of B cells present within the tonsillar population was studied by stimulating the cells with isotype-specific antibodies; anti-μ, anti-δ or anti-γ antibodies. Low concentrations of anti-μ antibodies up-regulated expression of IL-2Rα as did all concentrations of anti-γ antibodies. However, high doses of anti-μ antibodies and any dose of anti-δ antibodies failed to up-regulate IL-2Rα. It is possible that the failure of B cells to respond to high doses of anti-μ antibodies or to anti-δ antibodies by increasing IL-2Rα expression may cause these cells to become tolerised and thus prevent them from causing an auto-immune response. Expression of IL-2Rα on the cell surface can be related to events taking place at the promoter region of the IL-2Rα gene. There are at least three positive regulatory regions (PRRI-PRRIII) and two negative regulatory regions (NRE I and NRE II) within the promoter region and we chose to study PRR, and NREI because these regions are believed to be involved in the induction of IL-2Rα. It was found that an, as yet, unidentified protein, NRE-BP, which binds to NRE I plays a major role in controlling IL- 2Rα transcription when cells are stimulated via their sIgM receptors. NRE-BP appears to be involved in the silencing of the IL-2Rα gene and remains bound to the promoter when the B cells are stimulated with high concentrations of anti-μ antibodies. At low concentration of anti-μ antibodies, binding of NRE-BP to NRE I is attenuated. Although anti-γ antibodies up-regulate expression of IL-2Rα on the cell surface, anti-γ antibodies have no effect on the binding of NRE-BP to the promoter. Previous studies have discovered differences in signalling through the sIgM and slgG complexes. Now we have determined that sIgM and sIgG appear to act differently in the regulation of IL-2Rα and that the binding of NRE-BP to NRE I is important in this variation.
Limit theorems for nearly unstable Hawkes processes
Creators: name: Jaisson, Thibault
name: Rosenbaum, Mathieu
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistical Finance (q-fin.ST)
subject: Probability (math.PR)
subject: FOS: Economics and business
subject: FOS: Mathematics

description: Because of their tractability and their natural interpretations in term of market quantities, Hawkes processes are nowadays widely used in high-frequency finance. However, in practice, the statistical estimation results seem to show that very often, only nearly unstable Hawkes processes are able to fit the data properly. By nearly unstable, we mean that the $L^1$ norm of their kernel is close to unity. We study in this work such processes for which the stability condition is almost violated. Our main result states that after suitable rescaling, they asymptotically behave like integrated Cox-Ingersoll-Ross models. Thus, modeling financial order flows as nearly unstable Hawkes processes may be a good way to reproduce both their high and low frequency stylized facts. We then extend this result to the Hawkes-based price model introduced by Bacry et al. [Quant. Finance 13 (2013) 65-77]. We show that under a similar criticality condition, this process converges to a Heston model. Again, we recover well-known stylized facts of prices, both at the microstructure level and at the macroscopic scale.
description: Published in at http://dx.doi.org/10.1214/14-AAP1005 the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)
A Novel Approach to FFL Trajectory Analysis
Creators: name: Niebel, Frauke
name: Schumacher, Jonas
name: Mohn, Fabian
name: Ahlborg, Mandy
name: Buzug, Thorsten M.
name: Graeser, Matthias
Publisher: name: International Journal on Magnetic Particle Imaging IJMPI
Year: 2023

description: The sampling trajectory is an important parameter of a magnetic particle imaging (MPI) system and should be selected in order to guarantee the best image quality constrained by hardware limitations. A simulation study is performed with the side conditions of a permanent magnet-based field-free line (FFL) scanner system evaluating multiple trajectory types (radial, spiral, uniformspiral, flower) and trajectory densities in terms of spatial resolution. The findings provide information on suitable FFL trajectories and indicate initial trends for advantageous sampling patterns in the reference system. Within the used software framework, which has the potential to generate sequences based on real measurement data, we present here a novel approach to FFL trajectory analysis.
description: International Journal on Magnetic Particle Imaging IJMPI, Vol 9 No 1 Suppl 1 (2023)
Mid-Infrared Polarization of the Diffuse Interstellar Medium toward CygOB2-12
Creators: name: Telesco, Charles M.
name: Varosi, Frank
name: Wright, Christopher
name: Draine, Bruce T.
name: Acosta, Sergio Jose Fernández
name: Packham, Christopher
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the first mid-IR detection of the linear polarization toward the star CygOB2-12, a luminous blue hypergiant that, with Av of ~10 mag of foreground extinction, is a benchmark in the study of the properties of dust in the diffuse interstellar medium. The 8-13 micrometer spectropolarimetry, obtained with the CanariCam multi-mode camera at the Gran Telescopio Canarias (GTC), shows clear trends with wavelength characteristic of silicate grains aligned in the interstellar magnetic field. The maximum polarization, detected with 7.8 statistical significance near 10.2 micrometers, is (1.24 +/- 0.28) % with position angle (126 +/- 8) deg. We comment on these measurements in the context of recent models for the dust composition in the diffuse interstellar medium.
description: Accepted Astrophysical Journal Letters, October 9, 2022
New continuum and polarization observations of the Cygnus Loop with FAST II. Images and analyses
Creators: name: Sun, X. H.
name: Gao, X. Y.
name: Reich, W.
name: Jiang, P.
name: Li, D.
name: Yan, H.
name: Li, X. H.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present total-intensity and polarized-intensity images of the Cygnus Loop supernova remnant (SNR) observed by the Five-hundred-meter Aperture Spherical radio Telescope (FAST). The high angular-resolution and high-sensitivity images enable us to thoroughly compare the properties of the northern part with the southern part of the SNR. The central filament in the northern part and the southern part have a similar foreground rotation measure, meaning their distances are likely similar. The polarization analysis indicates that the random magnetic field is larger than the regular field in the northern part, but negligible in the southern part. The total-intensity image is decomposed into components of various angular scales, and the brightness-temperature spectral index of the shell structures in the northern part is similar to that in the southern part in the component images. All these evidence suggest that the northern and southern part of the Cygnus Loop are situated and thus evolved in different environments of interstellar medium, while belonging to the same SNR.
description: 13 pages, 7 figures, accepted for publication at RAA
3D Trajectory Analysis for Tomographic Field Free Line Magnetic Particle Imaging
Creators: name: ALPTEKİN SOYDAN, Damla
name: Karaca, Sefa
name: Güngör, Alper
name: Top, Can Barış
Publisher: name: International Journal on Magnetic Particle Imaging IJMPI
Year: 2023

description: In magnetic particle imaging (MPI), spatial mapping of the magnetic nanoparticles is achieved by scanning the field-free region (FFR) throughout the field of view (FOV). The scanning trajectory of the FFR has an impact on image quality and scan time, and also is subject to limitations such as hardware requirements and patient safety. Here, we analyzed 3D imaging performance of an open-sided MPI system using simulations for various trajectories and SNR values. A selection field of 0.35 T m−1 gradient with an FFL was created and scanned tomographically. For low SNR scenarios, the best imaging results were achieved at the expense of a longer scan time when 3D FOV was densely scanned layer by layer. For more sparse trajectories, the effect of the coherence between the scan angles became prominent with the increasing noise level. Image quality can be improved by assigning non-coherent FFL angles to the consequent layers while taking hardware limitations into account.
description: International Journal on Magnetic Particle Imaging IJMPI, Vol 9 No 1 Suppl 1 (2023)
Coarse amenability and discreteness
Creators: name: Dydak, Jerzy
Publisher: name: arXiv
Year: 2013
Subjects: subject: Metric Geometry (math.MG)
subject: General Topology (math.GN)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: Primary 54F45, Secondary 55M10

description: This paper is devoted to dualization of paracompactness to the coarse category via the concept of $R$-disjointness. Property A of G.Yu can be seen as a coarse variant of amenability via partitions of unity and leads to a dualization of paracompactness via partitions of unity. On the other hand, finite decomposition complexity of G.Yu and straight finite decomposition complexity of Dranishnikov-Zarichnyi employ $R$-disjointness as the main concept. We generalize both concepts to that of countable asymptotic dimension and our main result shows that it is a subclass of of spaces with Property A. In addition, it gives a necessary and sufficient condition for spaces of countable asymptotic dimension to be of finite asymptotic dimension.
description: 12 pages, to appear in Journal of the Australian Math Society
MPIMeasurements.jl: An Extensible Julia Framework for Composable Magnetic Particle Imaging Devices
Creators: name: Hackelberg, Niklas
name: Schumacher, Jonas
name: Ackers, Justin
name: Möddel, Martin
name: Förger, Fynn
name: Graeser, Matthias
name: Knopp, Tobias
Publisher: name: International Journal on Magnetic Particle Imaging IJMPI
Year: 2023

description: Magnetic particle imaging (MPI) is a pre-clinical imaging modality, whose system design is still evolving, in particular towards human studies and clinical use. Therefore, many MPI scanners are custom-made distributed systems, both on the hard- and the software side. In this work we present the open-source Julia framework MPIMeasurements.jl, which implements a composable representation of imaging systems. It also offers flexible data structures that allow the implementation of specific imaging protocols, such as online/offline measurements, repeated measurements and system matrix calibrations. %that are reusable across systems. The project is designed to be expanded to new systems through community development and component reuse. To showcase the versatility of the software package, we give an overview of four very different MPI systems, which were realized with MPIMeasurements.jl.
description: International Journal on Magnetic Particle Imaging IJMPI, Vol 9 No 1 Suppl 1 (2023)
Self-testing of different entanglement resources via fixed measurement settings
Creators: name: Li, Xinhui
name: Wang, Yukun
name: Han, Yunguang
name: Zhu, Shi-Ning
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Self-testing, which refers to device independent characterization of the state and the measurement, enables the security of quantum information processing task certified independently of the operation performed inside the devices. Quantum states lie in the core of self-testing as key resources. However, for the different entangled states, usually different measurement settings should be taken in self-testing recipes. This may lead to the redundancy of measurement resources. In this work, we use fixed two-binary measurements and answer the question that what states can be self-tested with the same settings. By investigating the structure of generalized tilted-CHSH Bell operators with sum of squares decomposition method, we show that a family of two-qubit entangled states can be self-tested by the same measurement settings. The robustness analysis indicates that our scheme is feasible for practical experiment instrument. Moreover, our results can be applied to various quantum information processing tasks.
Embedded Lensing Time Delays, the Fermat Potential, and the Integrated Sachs-Wolfe Effect
Creators: name: Chen, Bin
name: Kantowski, Ronald
name: Dai, Xinyu
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We derive the Fermat potential for a spherically symmetric lens embedded in an FLRW cosmology and use it to investigate the late-time integrated Sachs-Wolfe (ISW) effect, i.e., secondary temperature fluctuations in the cosmic microwave background (CMB) caused by individual large scale clusters and voids. We present a simple analytical expression for the temperature fluctuation in the CMB across such a lens as a derivative of the lens' Fermat potential. This formalism is applicable to both linear and nonlinear density evolution scenarios, to arbitrarily large density contrasts, and to all open and closed background cosmologies. It is much simpler to use and makes the same predictions as conventional approaches. In this approach the total temperature fluctuation can be split into a time-delay part and an evolutionary part. Both parts must be included for cosmic structures that evolve and both can be equally important. We present very simple ISW models for cosmic voids and galaxy clusters to illustrate the ease of use of our formalism. We use the Fermat potentials of simple cosmic void models to compare predicted ISW effects with those recently extracted from WMAP and \emph{Planck} data by stacking large cosmic voids using the aperture photometry method. If voids in the local universe with large density contrasts are no longer evolving we find that the time delay contribution alone predicts values consistent with the measurements. However, we find that for voids still evolving linearly, the evolutionary contribution cancels a significant part of the time delay contribution and results in predicted signals that are much smaller than recently observed.
description: 25 pages, 4 figures, ApJ in press
On differential modules associated to de Rham representations in the imperfect residue field case
Creators: name: Ohkubo, Shun
Publisher: name: arXiv
Year: 2013
Subjects: subject: Number Theory (math.NT)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: Let $K$ be a complete discrete valuation field of mixed characteristic $(0,p)$, whose residue field may not be perfect, and $G_K$ the absolute Galois group of $K$. In the first part of this paper, we prove that Scholl's generalization of fields of norms over $K$ is compatible with Abbes-Saito's ramification theory. In the second part, we construct a functor $\mathbb{N}_{\mathrm{dR}}(V)$ associating a de Rham representation $V$ with a $(φ,\nabla)$-module in the sense of Kedlaya. Finally, we prove a compatibility between Kedlaya's differential Swan conductor of $\mathbb{N}_{\mathrm{dR}}(V)$ and Swan conductor of $V$, which generalizes Marmora's formula.
description: 50pages; v4: minor corrections
title: Curating dream experiences: studio-based journey for mental well-being
Creators: name: Xiao, Yun
Publisher: name: Emily Carr University of Art and Design
Year: 2022
Subjects: subject: Dreams
valueUri: https://id.loc.gov/authorities/subjects/sh85039483
subject: Dream interpretation
valueUri: https://id.loc.gov/authorities/subjects/sh92004927
subject: Curatorship
valueUri: https://id.loc.gov/authorities/subjects/sh2012000150
subject: Art therapy
valueUri: https://id.loc.gov/authorities/subjects/sh85008088
subject: Psychotherapy
valueUri: https://id.loc.gov/authorities/subjects/sh85108516

description: In the universal sense, as nonexistent, invisible, and subconscious things, dreams have a deep connection with our reality and the self and provide great help to self-study. Everybody dreams and every dream means something, no matter how fragmentary and ridiculous it may appear (Coriat, 1915). They are the products of combinations of our experience, physical activities, mental activities and subconsciousness that we experience during the day, which are fermented in the brain during sleep. My research is a cross-disciplinary journey that takes a philosophical stance of combining arts and design, to interrogate how dreams and subconsciousness help people get close to their psychological world and serve as critical contributors to creatively knowing the self. The major research approach in my work, that of curation, extends beyond the museum field. The curatorial concept works as a mechanism for dealing with information, “sifting, sorting, hiding, and standing out” (Davis, 2016). It is used in this project for doing design works addressing dream therapy, exhibiting aesthetic works, and collecting the audience’s opinion. Curation, the activity serves for people’s mind elicits dialogue and connection between human and multiple artifacts, escapes the constraints of space and time, and conveys deeper emotions or thoughts to the audience. What’s more, curation delivers a social function. Because exhibitions, as a common outcome of curation, are needed by society and are also a good tool for spreading information. On any random day, how much of what we say, feel, and do is controlled by the unconscious mind? Based on the psychological fact that our unconscious mind plays a crucial role in shaping behaviour, defining character, managing thoughts and ultimately, determining how we live in life each waking moment, and the intimate connection between dreams and unconscious, this work explores methods for creating an environment of mental well-being for people to pay attention to their psychological world in creative ways – getting to know our dreams.
The Active Galactic Nuclei in the Hobby-Eberly Telescope Dark Energy Experiment Survey (HETDEX) III. A red quasar with extremely high equivalent widths showing powerful outflows
Creators: name: Liu, Chenxu
name: Gebhardt, Karl
name: Kollatschny, Wolfram
name: Ciardullo, Robin
name: Cooper, Erin Mentuch
name: Davis, Dustin
name: Farrow, Daniel J.
name: Finkelstein, Steven L.
name: Gawiser, Eric
name: Gronwall, Caryl
name: Hill, Gary J.
name: House, Lindsay
name: Schneider, Donald P.
name: Urrutia, Tanya
name: Zeimann, Gregory R.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report an Active Galactic Nucleus (AGN) with extremely high equivalent width (EW), EW(LyA+NV,rest)>921 AA in the rest-frame, at z~2.24 in the Hobby-Eberly Telescope Dark Energy Experiment Survey (HETDEX) as a representative case of the high EW AGN population. The continuum level is a non-detection in the HETDEX spectrum, thus the measured EW is a lower limit. The source is detected with significant emission lines (>7sigma) at LyA+NV, CIV, and moderate emission line (~4sigma) at HeII within the wavelength coverage of HETDEX (3500 AA - 5500 AA). The r-band magnitude is 24.57 from the Hyper Suprime-Cam-HETDEX joint survey with a detection limit of r=25.12 at 5sigma. The LyA emission line spans a clearly resolved region of ~10 arcsec (85 kpc) in diameter. The LyA line profile is strongly double peaked. The spectral decomposed blue gas and red gas Ly$α$ emission are separated by ~1.2 arcsec (10.1 kpc) with a line-of-sight velocity offset of ~1100 km/s. This source is probably an obscured AGN with powerful winds.
description: 10 pages, 5 figures, 1 table, accepted for publication in ApJ
A Simple Gravitational Lens Model For Cosmic Voids
Creators: name: Chen, Bin
name: Kantowski, Ronald
name: Dai, Xinyu
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present a simple gravitational lens model to illustrate the ease of using the embedded lensing theory when studying cosmic voids. It confirms the previously used repulsive lensing models for deep voids. We start by estimating magnitude fluctuations and weak lensing shears of background sources lensed by large voids. We find that sources behind large ($\sim$$90\,\rm Mpc$) and deep voids (density contrast about $-0.9$) can be magnified or demagnified with magnitude fluctuations of up to $\sim$$0.05\,\rm mag$ and that the weak-lensing shear can be up to the $\sim$$10^{-2}$ level in the outer regions of large voids. Smaller or shallower voids produce proportionally smaller effects. We investigate the "wiggling" of the primary cosmic microwave background (CMB) temperature anisotropies caused by intervening cosmic voids. The void-wiggling of primary CMB temperature gradients is of the opposite sign to that caused by galaxy clusters. Only extremely large and deep voids can produce wiggling amplitudes similar to galaxy clusters, $\sim$$\rm 15\,μK$ by a large void of radius $\sim$$4^\circ$ and central density contrast $-0.9$ at redshift 0.5 assuming a CMB background gradient of $\sim$$\rm10\,μK\, arcmin^{-1}$. The dipole signal is spread over the entire void area, and not concentrated at the lens' center as it is for clusters. Finally we use our model to simulate CMB sky maps lensed by large cosmic voids. Our embedded theory can easily be applied to more complicated void models and used to study gravitational lensing of the CMB, to probe dark-matter profiles, to reduce the lensing-induced systematics in supernova Hubble diagrams, as well as study the integrated Sachs-Wolfe effect.
description: 25 pages, 4 figures, ApJ accepted
Neutron Emission Spectrometer To Measure Ion Temperature On The Fusion Demonstration Plant
Creators: name: Carle, P. J. F.
name: Retière, F.
name: Sher, A.
name: Underwood, R.
name: Starosta, K.
name: Hildebrand, M.
name: Barsky, S.
name: Howard, S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: General Fusion is building the Fusion Demonstration Plant to demonstrate a magnetized target fusion scheme in which a deuterium plasma is heated from 200 eV to 10 keV by piston-driven compression of a liquid-lithium liner. The multilayer coaxial time-of-flight (MCTOF) neutron emission spectrometer is designed to measure the ion temperature near peak compression at which time the neutron yield will approach $10^{18}$ neutrons/s. The neutron energy distribution is expected to be Gaussian since the machine uses no neutral beam or radiofrequency heating. In this case, analysis shows that as few as 500 coincidence events should be sufficient to accurately measure the ion temperature. This enables a fast time resolution of 10 $μs$, which is required to track the rapid change in temperature approaching peak compression. We overcome the challenges of neutron pileup and event ambiguity with a compact design having two layers of segmented scintillators. The error in the ion temperature measurement is computed as a function of the neutron spectrometer's geometric parameters and used to optimize the design for the case of reaching 10 keV at peak compression.
description: The following article has been accepted by Review of Scientific Instruments. After it is published, it will be found at https://aip.scitation.org/toc/rsi/HTPD2022/1. High Temperature Plasma Diagnostics 2022 conference. 5 pages, 9 figures
Guía Intro ABC - Ayudantes
Creators: name: MetaDocencia Team
Publisher: name: Zenodo
Year: 2022
Subjects: Ciencia Abierta
Cursos
docencia
pedagogía
clases virtuales
Latin America
enseñanza
Teaching
Comunidad

description: Este documento contiene las tareas y lineamientos principales del antes, durante y después para el rol de ayudante en el curso "Intro ABC".
Decentralized Multi-Robot Encirclement of a 3D Target with Guaranteed Collision Avoidance
Creators: name: Franchi, Antonio
name: Stegagno, Paolo
name: Oriolo, Giuseppe
Publisher: name: arXiv
Year: 2013
Subjects: subject: Systems and Control (eess.SY)
subject: Multiagent Systems (cs.MA)
subject: Robotics (cs.RO)
subject: Optimization and Control (math.OC)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: We present a control framework for achieving encirclement of a target moving in 3D using a multi-robot system. Three variations of a basic control strategy are proposed for different versions of the encirclement problem, and their effectiveness is formally established. An extension ensuring maintenance of a safe inter-robot distance is also discussed. The proposed framework is fully decentralized and only requires local communication among robots; in particular, each robot locally estimates all the relevant global quantities. We validate the proposed strategy through simulations on kinematic point robots and quadrotor UAVs, as well as experiments on differential-drive wheeled mobile robots.
description: Accepted for Autonomous Robots - Springer
PROTOCOL: Case management interventions seeking to counter radicalisation to violence: A systematic review of tools and approaches
Creators: name: Lewis, James
name: Marsden, Sarah
name: Cherney, Adrian
name: Zeuthen, Martine
name: J. Bélanger, Jocelyn
name: Zubareva, Anastasiia
name: Brandsch, Jürgen
name: Lubrano, Mauro
Publisher: name: University of Limerick
Year: 2023
Subjects: subject: Psychology
subject: FOS: Psychology

description: This systematic review consists of two parts. Part I seeks to synthesise evidence from primary or secondary research studies examining the implementation and effectiveness of case management tools and approaches currently being used to counter radicalisation to violence. Part II is an ‘overview of reviews’ that seeks to identify relevant and transferable lessons from systematic reviews and meta‐analyses of case management tools and approaches used in the broader field of violence prevention that could be applied to counter‐radicalisation practice.
Weak field limit for embedding gravity
Creators: name: Kuptsov, S. S.
name: Ioffe, M. V.
name: Manida, S. N.
name: Paston, S. A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study a perturbation theory for embedding gravity equations in a background for which corrections to the embedding function are linear with respect to corrections to the flat metric. The arbitrariness remaining after solving the linearized field equations is fixed by an assumption that the solution is static in the second order. A nonlinear differential equation is obtained, which makes it possible to find the gravitational potential for a spherically symmetric case if a background embedding is given. An explicit form of a spherically symmetric background parameterized by one function of radius is proposed. It is shown that this function can be chosen in such a way that the gravitational potential is in a good agreement with the observed distribution of dark matter in a galactic halo.
description: LaTeX, 14 pages. This version corresponds to the published one
Gibbs measures on permutations over one-dimensional discrete point sets
Creators: name: Biskup, Marek
name: Richthammer, Thomas
Publisher: name: arXiv
Year: 2013
Subjects: subject: Probability (math.PR)
subject: Mathematical Physics (math-ph)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We consider Gibbs distributions on permutations of a locally finite infinite set $X\subset\mathbb{R}$, where a permutation $σ$ of $X$ is assigned (formal) energy $\sum_{x\in X}V(σ(x)-x)$. This is motivated by Feynman's path representation of the quantum Bose gas; the choice $X:=\mathbb{Z}$ and $V(x):=αx^2$ is of principal interest. Under suitable regularity conditions on the set $X$ and the potential $V$, we establish existence and a full classification of the infinite-volume Gibbs measures for this problem, including a result on the number of infinite cycles of typical permutations. Unlike earlier results, our conclusions are not limited to small densities and/or high temperatures.
description: Published in at http://dx.doi.org/10.1214/14-AAP1013 the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Segal's spectral sequence in twisted equivariant K-theory for proper and discrete actions
Creators: name: Barcenas, Noe
name: Espinoza, Jesus
name: Uribe, Bernardo
name: Velasquez, Mario
Publisher: name: arXiv
Year: 2013
Subjects: subject: K-Theory and Homology (math.KT)
subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 19L47, 19L50, 55N91

description: We use a spectral sequence developed by Graeme Segal in order to understand the twisted G-equivariant K-theory for proper and discrete actions. We show that the second page of this spectral sequence is isomorphic to a version of Bredon cohomology with local coefficients in twisted representations. We furthermore explain some phenomena concerning the third differential of the spectral sequence, and we recover known results when the twisting comes from finite order elements in discrete torsion.
description: 25 pages. Corrected version. arXiv admin note: text overlap with arXiv:math/0411656 by other authors
Tracking Monetary-Fiscal Interactions across Time and Space
Creators: name: Franta, Michal
name: Libich, Jan
name: Stehlík, Petr
Publisher: name: La Trobe
Year: 2023
Subjects: classificationCode: 3502
subject: Banking, finance and investment
classificationCode: 3801
subject: Applied economics
classificationCode: 3803
subject: Economic theory

description: https://www.ijcb.org/journal/ijcb18q2a4.htmThe long-term fiscal outlook of most high-income countries is grim. Should independent central bankers be afraid of an unpleasant monetarist arithmetic, i.e., fiscal imbalances spilling over to monetary policy and jeopardizing price stability? To provide some insights, this paper tracks the interactions between fiscal and monetary policies in the data since 1980 for Australia, Canada, Japan, Switzerland, the United Kingdom, and the United States. In doing so it uses a combination of time-varying parameter vector autoregression with sign, magnitude, and contemporaneous restrictions identification. Unlike conventional approaches, this can capture changes in monetary and fiscal behavior that are gradual and differ across the two policies. Our results show that in the United States the degree of monetary policy accommodation of fiscal shocks (debt-financed government spending) increased gradually between the late 1980s and the 2008 crisis, i.e., over the whole tenure of Chairman Greenspan. In contrast, it seems to have decreased over this period in the United Kingdom, Australia, Switzerland, and Canada. Our benchmark analysis and several robustness checks show that legislating numerical inflation targets may account for some of the country differences, presumably because they may shift the strategic power from fiscal to monetary policy. We conclude by considering the implications of our results for the long-term likelihood of an unpleasant monetarist arithmetic in the six countries.
Non-Markovian effect on remote state preparation
Creators: name: Xu, Zhen-Yu
name: Liu, Chen
name: Luo, Shunlong
name: Zhu, Shiqun
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Memory effect of non-Markovian dynamics in open quantum systems is often believed to be beneficial for quantum information processing. In this work, we employ an experimentally controllable two-photon open system, with one photon experiencing a dephasing environment and the other being free from noise, to show that non-Markovian effect may also have a negative impact on quantum tasks such as remote state preparation: For a certain period of controlled time interval, stronger non-Markovian effect yields lower fidelity of remote state preparation, as opposed to the common wisdom that more information leads to better performance. As a comparison, a positive non-Markovian effect on the RSP fidelity with another typical non-Markovian noise is analyzed. Consequently, the observed dual character of non-Markovian effect will be of great importance in the field of open systems engineering.
description: 7 pages, 5 figures
title: Archäologische Informationen, Vol 21, No 1 (1998)
Creators: name: DGUF E.V.
Publisher: name: University Library Heidelberg
Year: 2014

description: Interdisziplinarität in der Archäologie
description: Vorwort
 Inhalt
 Interdisziplinarität in der Archäologie: eine Notwendigkeit ?!...9-20
 Von der Leimsiederei zum Straßenschotter: Interpretationsänderung durch interdisziplinäre Zusammenarbeit...27-31
 Anthropologie und Archäologie. Interdisziplinarität - Utopie oder Wirklichkeit ?...33-39
 Ethnoarchäologie. Ein Plädoyer für Interdisziplinarität und Disziplinlosigkeit in der Archäologie...41-49
 Archäologie, Vorgeschichte, Urgeschichte, Frühgeschichte, Geschichte. Ein Beitrag zu Begriffsgeschichte und Zeitgeist...51-86
 Ethnoarchäologie auf dem Tübinger Marktplatz...87-108
 Archäoastronomie in Stonehenge und der Charakter der Archäologie. Stonehenge-Forscher Ingo Marzahn im Gespräch mit Cornelius Holtorf...109-129
 Luftbildarchäologie in Zentraleuropa. Das RAPHAEL-Projekt am Landesamt für Archäologie in Dresden...131-135
 Knüpfnetz, Querangel und Schenkelhaken. "Experimentelle Archäologie" mit Kindern II...151-158
 26th. Computer Applications in Archaeology. Barcelona, March 24th. - 28th. 1998...159-161
 Susanne Buchta-Hohm: Das alamannische Gräberfeld von Donaueschingen (Schwarzwald-Baar-Kreis), 1996...163-169
 Die ebenerdigen Pfostenbauten des Mittelalters aus den Siedlungsgrabungen im Rheinischen Braunkohlenrevier...173-175
 Die alamannischen Funde von Nagold, Kreis Calw...177-180
 Germanen im Quadrat - Die Neckarsweben in Mannheim und Umgebung...185-188
 Steinartefaktfunde aus saalezeitlichen Schottern bei Lübbow (Lkr. Lüchow-Dannenberg) - Sammlung H. Leunig -...189-190
 Studien zur jüngeren postglazialen Vegetations- und Siedlungsgeschichte im östlichen Schleswig-Holstein...191-196
 Jahrestagungen 1998 und 1999 / Beschlüsse der Mitgliederversammlung 1998 / Resolution / Archäologische Berichte / Rezensionsangebote...197-199
 DGUF-Anzeige: Archäologische Berichte...200-201
 Adressen der Mitglieder des Vorstandes und des Beirates der DGUF...202
 Hinweise der Redaktion...204
Towards understanding of the combustion chemistry of propellant functional groups via kinetic modeling of amyl-nitrite
Creators: name: Minwegen, Heiko Julian
name: Glorian, Julien
name: Preußker, Matthias
name: Heufer, Karl Alexander
name: Baschung, Barbara
Publisher: name: RWTH Aachen University
Year: 2022
Subjects: Amyl-nitrite
Detailed kinetic modelling
Ignition delay times
Rapid compression machine
Shock tube

description: 51. International Annual Conference of the Fraunhofer ICT, Karlsruhe, Germany, 28 Jun 2022 - 1 Jul 2022; [1]-24 Folien (2022).
The core shift effect in the blazar 3C 454.3
Creators: name: Kutkin, A. M.
name: Sokolovsky, K. V.
name: Lisakov, M. M.
name: Kovalev, Y. Y.
name: Savolainen, T.
name: Voytsik, P. A.
name: Lobanov, A. P.
name: Aller, H. D.
name: Aller, M. F.
name: Lahteenmaki, A.
name: Tornikoski, M.
name: Volvach, A. E.
name: Volvach, L. N.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Opacity-driven shifts of the apparent VLBI core position with frequency (the "core shift" effect) probe physical conditions in the innermost parts of jets in active galactic nuclei. We present the first detailed investigation of this effect in the brightest gamma-ray blazar 3C454.3 using direct measurements from simultaneous 4.6-43 GHz VLBA observations, and a time lag analysis of 4.8-37 GHz lightcurves from the UMRAO, CrAO, and Metsahovi observations in 2007-2009. The results support the standard Konigl model of jet physics in the VLBI core region. The distance of the core from the jet origin r_c(nu), the core size W(nu), and the lightcurve time lag DT(nu) all depend on the observing frequency nu as r_c(nu)~W(nu)~ DT(nu)~nu^-1/k. The obtained range of k=0.6-0.8 is consistent with the synchrotron self-absorption being the dominating opacity mechanism in the jet. The similar frequency dependence of r_c(nu) and W(nu) suggests that the external pressure gradient does not dictate the jet geometry in the cm-band core region. Assuming equipartition, the magnetic field strength scales with distance r as B = 0.4(r/1pc)^-0.8 G. The total kinetic power of electron/positron jet is about 10^44 ergs/s.
description: Accepted for publication in MNRAS; 10 pages, 6 figures
title: Archäologische Informationen, Vol 22, No 2 (1999)
Creators: name: DGUF E.V.
Publisher: name: University Library Heidelberg
Year: 2014

description: Erfindung - Innovation - Idee
description: Titel
 Impressum
 Vorwort
 Inhalt
 Technische Innovationen im Mittelalter (11. bis 13. Jh.). Modelle zur Erfassung ihres Ablaufs und ihrer Durchsetzung...203-213
 Kulturwandel als Innovationsprozeß: Die fünf großen "W" und die Verbreitung des Mittelneolithikums in Südwestdeutschland...215-239
 Innovation, ein semiologisches Abenteuer - Das Beispiel der Hallstattzeit in Südwestdeutschland...241-260
 Fürst oder Häuptling? Eine Analyse der herausragenden Bestattungen der frühen Bronzezeit...261-268
 Ein Vorschlag zur Funktion der ältesten Wagen in Mitteleuropa...269-277
 Bemerkungen zu Brigitte Röder, "Illusionäre Vergangenheitsaneignung" kontra "patriarchale Verblendung": Matriarchatsforschung und Archäologie in Deutschland (Archäologische Informationen 21/2, 1998, 299-313)...279-289
 Ur- und Frühgeschichte im Schulbuch II...293-297
 Günter Krause: Vergangenheit ohne Zukunft? Archäologische Zeugnisse aus Duisburg-Huckingen und dem Duisburger Süden von den Anfängen bis ins Industriezeitalter, 1998...299-300
 Jörg Biel, Helmut Schlichterle, Michael Strobel und Andrea Zeeb (Hrsg.): Die Michelsberger Kultur und ihre Randgebiete - Probleme der Entstehung, Chronologie und des Siedlungswesens, 1998...301-302
 Manfred Korfmann & Dietrich Mannsperger: Troia: Ein historischer Überblick und Rundgang, 1998...303-306
 Deutsche Burgenvereinigung (Hrsg.): Burgen in Mitteleuropa. Ein Handbuch, 1999...307-311
 Dirk Krauße: Hochdorf III. Das Trink- und Speiseservice aus dem späthallstattzeitlichen Fürstengrab von Eberdingen-Hochdorf, Kreis Ludwigsburg, 1996...313-318
 Volker Heyd unter Mitarbeit von Louis D. Nebelsick: Das prähistorische Gräberfeld von Niederkaina bei Bautzen, Bd. 3, 1998...341-342
 Hermann Behrens: Grundfragen der deutschen Urgeschichtswissenschaft. Wo stehen die Archäologen am Ende des 20. Jahrhunderts?, 1999...343-347
 Diskussionsbemerkungen zu einer Rezension von Jürgen Hoika über den Titel: H. Behrens, Grundfragen der deutschen Urgeschichtswissenschaft. Wo stehen die Archäologen am Ende des 20. Jahrhunderts?...349-350
 Der endeiszeitliche Rückenspitzen-Kreis Mitteleuropas...357-359
 Der linearbandkeramische Siedlungsplatz Frimmersdorf 122, Erftkreis...361-366
 Die eisenzeitliche Siedlung von Hamburg-Marmstorf...367-368
 Kelten in Italien zwischen 600 und 400 v. Chr. - Ein Beitrag zur keltischen Einwanderung in Italien...369-372
 Studien zu frühslawischen Bestattungssitten im nördlichen Deutschland...373-379
 Jahrestagung 2000 / Archäologische Informationen / Archäologische Berichte / Rezensionsangebote...387-388
 Adressen der Mitglieder des Vorstandes und des Beirates der DGUF...389
 Hinweise der Redaktion...390
 Bestelliste Archäologische Informationen...392
 Bericht über das Treffen der Arbeitsgemeinschaft "Quantitative Methoden in der Archäologie" am 28. 5.1999 in Heidelberg...291-292
Time delay in 1D disordered media with high transmission
Creators: name: Razo-López, Luis A.
name: Méndez-Bermúdez, J. A.
name: Gopar, Victor A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the time delay of reflected and transmitted waves in 1D disordered media with high transmission. Highly transparent and translucent random media are found in nature or can be synthetically produced. We perform numerical simulations of microwaves propagating in disordered waveguides to show that reflection amplitudes are described by complex Gaussian random variables with the remarkable consequence that the time-delay statistics in reflection of 1D disordered media are described as in random media in the diffusive regime. For transmitted waves, we show numerically that the time delay is an additive quantity and its fluctuations thus follow a Gaussian distribution. Ultimately, the distributions of the time delay in reflection and transmission are physical illustrations of the central limit theorem at work.
description: 8 pages, 11 figures
Wireless-Powered Relays in Cooperative Communications: Time-Switching Relaying Protocols and Throughput Analysis
Creators: name: Nasir, Ali Arshad
name: Zhou, Xiangyun
name: Durrani, Salman
name: Kennedy, Rodney A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: We consider wireless-powered amplify-and-forward and decode-and-forward relaying in cooperative communications, where an energy constrained relay node first harvests energy through the received radio-frequency signal from the source and then uses the harvested energy to forward the source information to the destination node. We propose time-switching based energy harvesting (EH) and information transmission (IT) protocols with two modes of EH at the relay. For continuous time EH, the EH time can be any percentage of the total transmission block time. For discrete time EH, the whole transmission block is either used for EH or IT. The proposed protocols are attractive because they do not require channel state information at the transmitter side and enable relay transmission with preset fixed transmission power. We derive analytical expressions of the achievable throughput for the proposed protocols. The derived expressions are verified by comparison with simulations and allow the system performance to be determined as a function of the system parameters. Finally, we show that the proposed protocols outperform the existing fixed time duration EH protocols in the literature, since they intelligently track the level of the harvested energy to switch between EH and IT in an online fashion, allowing efficient use of resources.
description: accepted for publication in IEEE Transactions on Communications