cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Drift wave turbulence in a dense semiclassical magnetoplasma
Creators: name: Kendl, Alexander
name: Shukla, Padma K.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: A semiclassical nonlinear collisional drift wave model for dense magnetized plasmas is developed and solved numerically. The effects of fluid electron density fluctuations associated with quantum statistical pressure and quantum Bohm force are included, and their influences on the collisional drift wave instability and the resulting fully developed nanoscale drift wave turbulence are discussed. It is found that the quantum effects increase the growth rate of the collisional drift wave instability, and introduce a finite de Broglie length screening on the drift wave turbulent density perturbations. The relevance to nanoscale turbulence in nonuniform dense magnetoplasmas is discussed.
description: Submitted to Phys. Letters A (2011)
Simulation of the TAEs saturation phase in Large Helical Device device: MHD burst
Creators: name: Varela, J.
name: Spong, D. A.
name: Todo, Y.
name: Garcia, L.
name: Ghai, Y.
name: Ortiz, J.
name: Seki, R.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The aim of the present study is to analyze the saturation regime of the Toroidal Alfven Eigenmodes (TAE) in the LHD plasma, particularly the MHD burst. The linear and nonlinear evolution of the TAEs are simulated by the FAR3d code that uses a reduced MHD model for the thermal plasma coupled with a gyrofluid model for the energetic particles (EP) species. The linear simulations indicate the overlapping of 1/2-1/1, 2/3-2/4 and 3/5-3/6 TAEs in the inner-middle plasma region and frequency range of 45-75 kHz, triggered by EPs with an energy of Tf = 45 keV and EP beta = 0.022. The nonlinear simulations show that 2/3-2/4 and 3/4-3/5 TAEs are further destabilized due to the energy transfer from 1/1-1/2 TAE, leading to a broad TAEs radial overlapping and the MHD burst triggering. The energy of 1/1-1/2 TAE is also nonlinearly transferred to the thermal plasma destabilizing the 0/0 and 0/1 modes, inducing the generation of shear flows and zonal currents as well as large deformations in the thermal pressure and EP density radial profiles. The nonlinear simulation reproduces the same succession of instabilities and the same frequency range with respect to the experiment. The instability propagates outward during the bursting phase, showing a large decrease of the EP density profile between the middle-outer plasma, pointing out the loss of part of the EP population that explains the decrease of the plasma heating efficiency observed during the MHD burst.
The IACOB project: A grid-based automatic tool for the quantitative spectroscopic analysis of O-stars
Creators: name: Simón-Díaz, S.
name: Castro, N.
name: Herrero, A.
name: Puls, J.
name: Garcia, M.
name: Sabín-Sanjulián, C.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the IACOB grid-based automatic tool for the quantitative spectroscopic analysis of O-stars. The tool consists of an extensive grid of FASTWIND models, and a variety of programs implemented in IDL to handle the observations, perform the automatic analysis, and visualize the results. The tool provides a fast and objective way to determine the stellar parameters and the associated uncertainties of large samples of O-type stars within a reasonable computational time.
description: 8 pages, 2 figures, 1 table. Proceedings of the "GREAT-ESF Stellar Atmospheres in the Gaia Era Workshop"
Impurity effects on Dirac modes in graphene armchair nanoribbons
Creators: name: Pogorelov, Yuriy G.
name: Loktev, Vadim M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We consider finite ribbons of graphene with armchair orientation of their edges to study in detail impurity effects on specific Dirac-like modes. In the framework of Anderson hybrid model of impurity perturbation, a possibility for Mott localization and for opening of a mobility gap under local impurity perturbations is found and analyzed in function of this model parameters: the impurity energy level, its hybridization with the host Dirac modes, and the impurity concentration. Possible electronic phase states in such disordered system and subsequent phase transitions between them are discussed.
description: 11 pages, 15 figures
Higgs Mass Prediction for Realistic String/M Theory Vacua
Creators: name: Kane, Gordon
name: Kumar, Piyush
name: Lu, Ran
name: Zheng, Bob
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Recently it has been recognized that in compactified string/M-theories that satisfy cosmological constraints, it is possible to derive some robust and generic predictions for particle physics and cosmology with very mild assumptions. When the matter and gauge content below the compactification scale is that of the MSSM, it is possible to make precise predictions. In this case, we predict that there will be a single Standard Model-like Higgs boson with a calculable mass 105 GeV $\lesssim M_h \lesssim$ 129 GeV depending on tan beta (the ratio of the Higgs vevs in the MSSM). For tan beta > 7, the prediction is : 122 GeV $\lesssim M_h \lesssim$ 129 GeV.
description: 8 pages, 1 Figure
Drama and Historiography: the Interaction between Diegesis and Mimesis in Herodotus and Thucydides
Creators: name: Ugolini, Gherardo
Publisher: name: Skenè. Journal of Theatre and Drama Studies
Year: 2016

description: This essay explores the presence and dynamic combination of the diegetic and mimetic modes in the writings of Herodotus and Thucydides as typical examples of fifth-century BC Greek historiography. Relying on significant examples, it offers a narratological discussion of diegesis (heterodiegesis, omniscience, and dramatized narration) showing similarities and differences between the two authors. It also investigates the main functions of mimesis, or direct speech, in their narratives, and illustrates its aims and causes, how it contributes to the psychological characterization and the dramatization of the events, as well as their explanation and interpretation. The widespread presence of dialogues in both Herodotus and Thucydides raises a number of intriguing theoretical questions regarding the relation of their prose with the epic model and the composition and oral fruition of historiographical works in the fifth century. Special attention is devoted to specific passages which, while being almost devoid of narrative pieces (Xerxes’ Council in Herodotus 7.8-19 and the Melian dialogue in Thucydides 5.85-113), show a peculiar proclivity for dialogue suggestiong a typically dramatic potential.
description: Skenè. Journal of Theatre and Drama Studies, Vol. 2 No. 2 (2016): Diegesis and Mimesis
Considering sustainability in the development of consumer goods
Creators: name: Petersen, Moritz
Publisher: name: TUHH Universitätsbibliothek
Year: 2017
Subjects: subject: Sustainability
subject: Product Development
subject: Grounded Theory
subject: Behavioral Experiments
subject: Consumer Goods
classificationCode: 330
subject: Wirtschaft

description: Nachhaltigere Produkte sind ein zentraler Aspekt einer zukunftsfähigen Wirtschaft. In der vorliegenden Dissertation wird untersucht, wie Konsumgüterproduzenten mit der unscharfen Zielvorgabe „nachhaltig“ in ihrem Produktentwicklungsprozesses umgehen. Dazu werden die Ergebnisse einer qualitativen Studie basierend auf Interviews mit 32 Produktentwicklungsverantwortlichen sowie einer quantitativen Experimentalstudie zur Untersuchung von Konsumentenreaktionen auf Entwicklungspraktiken zusammengefasst. Es zeigt sich unter anderem, dass viele Firmen keine kohärente Nachhaltigkeitsstrategie verfolgen. Aus den Ergebnissen werden Empfehlungen für eine Optimierung des Produktentwicklungsprozesses abgeleitet.
description: Developing more sustainable products provides an opportunity to address the negative effects of current consumption practices. This dissertation explores how consumer goods companies approach the elusive goal of sustainability and identifies challenges in the product development process. Specifically, results from a qualitative study based on interviews with 32 product development managers as well as from a quantitative experimental study investigating consumers' responses to specific development practices are reported. The findings show that many companies lack a coherent sustainability strategy. Implications of the findings for product development processes are detailed.
Phase diagram of the Kitaev-Heisenberg model using various finite-size clusters
Creators: name: Kadosawa, Masahiro
name: Nakamura, Masaaki
name: Ohta, Yukinori
name: Nishimoto, Satoshi
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We estimate phase boundaries of four ordered and two spin-liquid phases for the spin-$\frac{1}{2}$ Kitaev-Heisenberg (KH) model using four kinds of relatively-small clusters, based on the second derivative of ground-state energy. The estimated values are compared between the clusters as well as the previous iPEPS results. We thus find that the boundaries can be accurately estimated within limited-size clusters. The used clusters may appropriate to study higher-$S$ KH models having less fluctuations.
description: 2 pages, 2 figures
Modular simulation of neuroangiography and endovascular interventions in neuroradiology
Creators: name: Schwenke, Hannes
name: Calopresti, Leonora
name: Buzug, Thorsten M.
name: Schramm, Peter
name: Friedrich, Thomas
Publisher: name: Transactions on Additive Manufacturing Meets Medicine
Year: 2021

description: A concept for a specialized phantom system for the simulations of diagnostic and therapeutic procedures in neuroradiology is presented. The modular simulator can be used for testing and training of both, established and new approaches in image guided catheter interventions. The 3D printing of anatomical vessel phantoms allows for the reproduction of specific features of the vasculature on the path of the catheter.
description: Transactions on Additive Manufacturing Meets Medicine, Vol 3 No 1 (2021): Trans. AMMM
Bei der Redaktion eingegangene Neuerscheinungen
Creators: name: Redaktion, Die
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2020

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 21 Nr. 11 (1968): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Bei der Redaktion eingegangene Neuerscheinungen
Creators: name: Redaktion, Die
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2020

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 26 Nr. 1 (1973): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Recommender Systems
Creators: name: Lü, Linyuan
name: Medo, Matus
name: Yeung, Chi Ho
name: Zhang, Yi-Cheng
name: Zhang, Zi-Ke
name: Zhou, Tao
Publisher: name: arXiv
Year: 2012
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Information Retrieval (cs.IR)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: The ongoing rapid expansion of the Internet greatly increases the necessity of effective recommender systems for filtering the abundant information. Extensive research for recommender systems is conducted by a broad range of communities including social and computer scientists, physicists, and interdisciplinary researchers. Despite substantial theoretical and practical achievements, unification and comparison of different approaches are lacking, which impedes further advances. In this article, we review recent developments in recommender systems and discuss the major challenges. We compare and evaluate available algorithms and examine their roles in the future developments. In addition to algorithms, physical aspects are described to illustrate macroscopic behavior of recommender systems. Potential impacts and future directions are discussed. We emphasize that recommendation has a great scientific depth and combines diverse research fields which makes it of interests for physicists as well as interdisciplinary researchers.
description: 97 pages, 20 figures (To appear in Physics Reports)
Stenosis simulation of femoral arteries using an adaptive 3D-printed actuator
Creators: name: Dell, Annika
name: Wegner, Franz
name: Aderhold, Eric
name: Buzug, Thorsten M.
name: Friedrich, Thomas
Publisher: name: Transactions on Additive Manufacturing Meets Medicine
Year: 2021

description: Motivated by the need for a simulator for varying degrees of vascular stenosis and different stenosis geometries, a pneumatic actuator was conceived and developed using additive manufacturing. This actuator includes flexible and rigid parts. The flexible components yield to incoming air pressure, so varying degrees of stenosis can be simulated based on the air pressure used. The primary benefits of such an actuator are the lack of artifact-causing metal parts and the design flexibility additive manufacturing allows. Thus, such an actuator is useful in cardiovascular studies using MRI, CT, or MPI, as various stenosis geometries and degrees of vascular stenosis can be simulated.
description: Transactions on Additive Manufacturing Meets Medicine, Vol 3 No 1 (2021): Trans. AMMM
A Difference Version of Nori's Theorem
Creators: name: Maier, Annette
Publisher: name: arXiv
Year: 2012
Subjects: subject: Rings and Algebras (math.RA)
subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: 12H10, 11G09, 20G40

description: We consider (Frobenius) difference equations over (F_q(s,t), phi) where phi fixes t and acts on F_q(s) as the Frobenius endomorphism. We prove that every semisimple, simply-connected linear algebraic group G defined over F_q can be realized as a difference Galois group over F_{q^i}(s,t) for some i in N. The proof uses upper and lower bounds on the Galois group scheme of a Frobenius difference equation that are developed in this paper. The result can be seen as a difference analogue of Nori's Theorem which states that G(F_q) occurs as (finite) Galois group over F_q(s).
description: 29 pages
Advances in manufacturing spinal cord implant using 3D selective laser induced etching of fused silica
Creators: name: Rennpferdt, Lukas
name: Bohne, Sven
name: Trieu, Hoc Khiem
Publisher: name: Transactions on Additive Manufacturing Meets Medicine
Year: 2021

description: Spinal cord injury (SCI) results in its dysfunction and can lead to permanent paralysis. We developed a mechanical microconnector system (mMS) to support regeneration after the SCI. This paper describes a new fabrication process of the mMS using selective laser induced etching (SLE). This technique enables the 3D microstructuring of fused silica and promises rapid and highly individualizable mMS. We show that the SLE process enhances the fabrication with regard to complexity, speed and quality. An individual mMS is produced in less than 48h hours with structures from 4µm to 1mm.
description: Transactions on Additive Manufacturing Meets Medicine, Vol 3 No 1 (2021): Trans. AMMM
Ausstellungskalender
Creators: name: Redaktion, Die
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2020

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 26 Nr. 12 (1973): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
CAViaR: Context Aware Video Recommendations
Creators: name: Mahajan, Khushhall Chandra
name: Palnitkar, Aditya
name: Raul, Ameya
name: Schumitsch, Brad
Publisher: name: arXiv
Year: 2023
Subjects: subject: Information Retrieval (cs.IR)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Many recommendation systems rely on point-wise models, which score items individually. However, point-wise models generating scores for a video are unable to account for other videos being recommended in a query. Due to this, diversity has to be introduced through the application of heuristic-based rules, which are not able to capture user preferences, or make balanced trade-offs in terms of diversity and item relevance. In this paper, we propose a novel method which introduces diversity by modeling the impact of low diversity on user's engagement on individual items, thus being able to account for both diversity and relevance to adjust item scores. The proposed method is designed to be easily pluggable into existing large-scale recommender systems, while introducing minimal changes in the recommendations stack. Our models show significant improvements in offline metrics based on the normalized cross entropy loss compared to production point-wise models. Our approach also shows a substantial increase of 1.7% in topline engagements coupled with a 1.5% increase in daily active users in an A/B test with live traffic on Facebook Watch, which translates into an increase of millions in the number of daily active users for the product.
description: Accepted by WWW'2023
Ausstellungskalender
Creators: name: Redaktion, Die
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2020

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 26 Nr. 2 (1973): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Saying Hallo to M94's Stellar Halo: Investigating the Accretion History of the Largest Pseudobulge Host in the Local Universe
Creators: name: Gozman, Katya
name: Bell, Eric F.
name: Smercina, Adam
name: Price, Paul
name: Bailin, Jeremy
name: de Jong, Roelof S.
name: D'Souza, Richard
name: Jang, In Sung
name: Monachesi, Antonela
name: Slater, Colin
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: It is not yet settled how the combination of secular processes and merging gives rise to the bulges and pseudobulges of galaxies. The nearby ($D\sim$ 4.2 Mpc) disk galaxy M94 (NGC 4736) has the largest pseudobulge in the local universe, and offers a unique opportunity for investigating the role of merging in the formation of its pseudobulge. We present a first ever look at M94's stellar halo, which we expect to contain a fossil record of M94's past mergers. Using Subaru's Hyper Suprime-Cam, we resolve and identify red giant branch (RGB) stars in M94's halo, finding two distinct populations. After correcting for completeness through artificial star tests, we can measure the radial profile of each RGB population. The metal-rich RGB stars show an unbroken exponential profile to a radius of 30 kpc that is a clear continuation of M94's outer disk. M94's metal poor stellar halo is detectable over a wider area and clearly separates from its metal-rich disk. By integrating the halo density profile, we infer a total accreted stellar mass of $\sim 2.8 \times 10^8 M_\odot$, with a median metallicity of [M/H] $=-$1.4. This indicates that M94's most-massive past merger was with a galaxy similar to, or less massive than, the Small Magellanic Cloud. Few nearby galaxies have had such a low-mass dominant merger; therefore we suggest that M94's pseudobulge was not significantly impacted by merging.
description: 19 pages, 12 figures, 1 table; Published in ApJ on April 14, 2023
Single Transverse-Spin Asymmetry in Large $P_T$ Open Charm Production at an Electron-Ion Collider
Creators: name: Beppu, Hiroo
name: Koike, Yuji
name: Tanaka, Kazuhiro
name: Yoshida, Shinsuke
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We discuss the single transverse-spin asymmetry (SSA) to be observed in the $D$-meson production with large transverse-momentum in semi-inclusive deep inelastic scattering, $e p^\uparrow \rightarrow e D X$. This contribution is embodied as a twist-3 mechanism in the collinear factorization, which is induced by purely gluonic correlation inside the transversely-polarized nucleon, in particular, by the three-gluon correlation effects. The complete formula for the corresponding SSA in the leading-order QCD is expressed in terms of the four independent gluonic correlation functions and reveals the five independent structures with respect to the dependence on the azimuthal angle for the produced $D$-meson. We present the numerical calculations of the SSA formula at the kinematics relevant to a future Electron Ion Collider.
description: 16 pages, 7 figures
Spin it as you like: the (lack of a) measurement of the spin tilt distribution with LIGO-Virgo-KAGRA binary black holes
Creators: name: Vitale, Salvatore
name: Biscoveanu, Sylvia
name: Talbot, Colm
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: While much has been learned about black holes by analyzing the latest LVK catalog, GWTC-3, a measurement of the astrophysical distribution of the black hole spin orientations remains elusive. This is usually probed by measuring the cosine of the tilt angle ($\cosτ$) between each black hole spin and the orbital angular momentum, $\cosτ=+1$ being perfect alignment. Abbott et al. has modeled the $\cosτ$ distribution as a mixture of an isotropic component and a Gaussian component with mean fixed at +1 and width measured from the data. We want to verify if the data require the existence of such a peak at $\cosτ=+1$. We use various alternative models for the astrophysical tilt distribution and measure their parameters using the LVK GWTC-3 catalog. We find that a) Augmenting the LVK model such that the mean $μ$ of the Gaussian is not fixed at +1 returns results that strongly depend on priors. If we allow $μ>+1$ then the resulting astrophysical $\cosτ$ distribution peaks at +1 and looks linear, rather than Gaussian. If we constrain $-1\leq μ\leq+1$ the Gaussian component peaks at $μ=0.48^{+0.46}_{-0.99}$ (median and 90% symmetric credible interval). Two other 2-component mixture models yield $\cosτ$ distributions that either have a broad peak centered at $0.19^{+0.22}_{-0.18}$ or a plateau that spans the range [-0.5, +1], without a clear peak at +1. b) All of the models we considered agree on the fact that there is no excess of black hole tilts at around -1. c) While yielding quite different posteriors, the models considered in this work have Bayesian evidences that are the same within error bars. We conclude that the current dataset is not sufficiently informative to draw any model-independent conclusions on the astrophysical distribution of spin tilts, except that there is no excess of spins with negatively aligned tilts.
description: 6 pages body + 10 pages appendices. Following Ref suggestion, now includes differential rate plots per unit costilt. Data release on Zenodo linked from Data availability section. Note: the abstract in the metadata is shorter than the paper's due to Arxiv restriction to 1920 characters
Relative phase stability and lattice dynamics of NaNbO$_3$ from first-principles calculations
Creators: name: Machado, R.
name: Sepliarsky, M.
name: Stachiotti, M. G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report total energy calculations for different crystal structures of NaNbO$_3$ over a range of unit cell volumes using the all-electron full-potential (L)APW method. We employed both the local-density approximation (LDA) and the Wu-Cohen form of the generalized gradient approximation (GGA-WC) to test the accuracy of these functionals for the description of the complex structural behavior of NaNbO$_3$. We found that LDA not only underestimates the equilibrium volume of the system but also predicts an incorrect ground state for this oxide. The GGA-WC functional, on the other hand, significantly improves the equilibrium volume and provides relative phase stability in better agreement with experiments. We then use the GGA-WC functional for the calculation of the phonon dispersion curves of cubic NaNbO$_3$ to identify the presence of structural instabilities in the whole Brillouin zone. Finally, we report comparative calculations of structural instabilities as a function of volume in NaNbO$_3$ and KNbO$_3$ to provide insights for the understanding of the structural behavior of K$_{1-x}$Na$_x$NbO$_3$ solid solutions.
description: Accepted for publication in Physical Review B
Atomic scale chemical fluctuation in LaSrVMoO6: A proposed halfmetallic antiferromagnet
Creators: name: Jana, Somnath
name: Singh, Vijay
name: Kaushik, S. D.
name: Meneghini, Carlo
name: Pal, Prabir
name: Knut, Ronny
name: Karis, Olof
name: Dasgupta, Indra
name: Siruguri, Vasudeva
name: Ray, Sugata
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Half metallic antiferromagnets (HMAFM) have been proposed theoretically long ago but have not been realized experimentally yet. Recently, a double perovskite compound, LaSrVMoO6, has been claimed to be an almost real HMAFM system. Here, we report detailed experimental and theoretical studies on this compound. Our results reveal that the compound is neither a half metal nor an ordered antiferromagnet. Most importantly, an unusual chemical fluctuation is observed locally, which finally accounts for all the electronic and magnetic properties of this compound.
description: 10 pages, 3 figures, 3 tables
Super AKSZ construction, integral forms, and the 2-dimensional $\mathcal N=(1,1)$ sigma model
Creators: name: Hulik, Ondrej
name: Svoboda, Josef
name: Valach, Fridrich
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We discuss a natural extension of the AKSZ construction to the case where the source is given by a supermanifold with a chosen integral form. We then focus on the special case with the target given by a Courant algebroid. In the simplest case this leads to the BV version of the super Chern-Simons theory, as developed by Grassi-Maccaferri and Cremonini-Grassi. In the case of exact Courant algebroids we derive the 2-dimensional $\mathcal N=(1,1)$ sigma model on the boundary, together with the Wess-Zumino term, paralleling the approach of Ševera in the bosonic case.
description: 13 pages
3D Printed Surgical Guides for Distal Femoral Osteotomy
Creators: name: Belsure, Nikhil
name: Nagda, Taral
name: Parekh, Sagar
Publisher: name: Transactions on Additive Manufacturing Meets Medicine
Year: 2021

description: Conventional surgical techniques have relied on 2D medical imaging for surgical planning and correction of a limb deformity. This result in certain deviations observed post-surgery from the conventional average values of limb and joint angles. Computer Aided Design (CAD) and manufacturing technology, especially additive manufacturing, provide a solution through patient specific surgical guides. Patient specific surgical guides enable accurate cut of the bone and anatomically accurate corrections, mitigating the drawbacks of conventional surgery planning. This paper discusses the technology, materials, surgical planning technique and corroborates the accuracy of correction achieved with respect to the pre-operative planning.
description: Transactions on Additive Manufacturing Meets Medicine, Vol 3 No 1 (2021): Trans. AMMM
Quark and lepton flavor structure in magnetized orbifold models at residual modular symmetric points
Creators: name: Hoshiya, Kouki
name: Kikuchi, Shota
name: Kobayashi, Tatsuo
name: Uchida, Hikaru
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study quark and lepton mass matrices derived from magnetized $T^2/\mathbb{Z}_2$ orbifold models. Quark and lepton masses have a large hierarchy. In addition, mixing angles are large in the lepton sector, while those are small in the quark sector. We find that this structure can be realized in certain flavor models, which are identified by the zero points of the zero-mode wave functions of fermions and Higgs modes. We classify such realistic flavor models. Fixed points $τ=i$, $e^{2πi/3}$ and $i\infty$ of the modulus $τ$ play a role in realizing a large mass hierarchy through our scenario, where residual $S$, $ST$, and $T$ symmetries remain and the lightest Higgs modes can correspond to eigenstates of residual symmetries at the leading order. As a result, we find that there are 24 flavor models in total which can be realistic in a vicinity of $S$-symmetric vacuum but no flavor models for $ST$ and $T$-symmetric vacua.
description: 52 pages
Hans Rupprich †
Creators: name: Winzinger, Franz
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2020

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 26 Nr. 3 (1973): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Variance estimation for nearest neighbor imputation for US Census long form data
Creators: name: Kim, Jae Kwang
name: Fuller, Wayne A.
name: Bell, William R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: Variance estimation for estimators of state, county, and school district quantities derived from the Census 2000 long form are discussed. The variance estimator must account for (1) uncertainty due to imputation, and (2) raking to census population controls. An imputation procedure that imputes more than one value for each missing item using donors that are neighbors is described and the procedure using two nearest neighbors is applied to the Census long form. The Kim and Fuller [Biometrika 91 (2004) 559--578] method for variance estimation under fractional hot deck imputation is adapted for application to the long form data. Numerical results from the 2000 long form data are presented.
description: Published in at http://dx.doi.org/10.1214/10-AOAS419 the Annals of Applied Statistics (http://www.imstat.org/aoas/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Fabrication of a steerable magnetic micro-robot
Creators: name: Bakenecker, Anna C.
name: Von Gladiss, Anselm
name: Schwenke, Hannes
name: Behrends, André
name: Friedrich, Thomas
name: Lüdtke-Buzug, Kerstin
name: Neumann, Alexander
name: Penxová, Zuzana
name: Barkhausen, Joerg
name: Wegner, Franz
name: Buzug, Thorsten M.
Publisher: name: Transactions on Additive Manufacturing Meets Medicine
Year: 2021

description: A magnetic micro-robot is fabricated by a stereolithographic printing technique. It only measures 3 mm in length and 1.2 mm in width. After printing, the micro-robot was coated with a sealing lacquer, containing magnetic nanoparticles. Thus, magnetic properties could be introduced and the micro-robot becomes steerable by rotating magnetic fields and visible by Magnetic Particle Imaging. A model of the middle cerebral artery containing an aneurysm was chosen. This phantom was designed from patient’s angiography and 3D-printed. The micro-robot could be successfully steered through the middle cerebral artery into the aneurysm of the phantom, demonstrating a future application scenario of treating aneurysms.
description: Transactions on Additive Manufacturing Meets Medicine, Vol 3 No 1 (2021): Trans. AMMM
Direct observation of the Yb(4f13 6s2)F states and accurate determination of the YbF ionization energy
Creators: name: Persinger, Thomas D.
name: Han, Jiande
name: Le, Anh T.
name: Steimle, Timothy C.
name: Heaven, Michael C.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: YbF has been identified as a molecule that can be used to investigate charge-parity symmetry violations that are beyond the Standard Model of particle physics. Cooling to sub-milli-Kelvin is advantageous for experiments that probe manifestations of these symmetry violations. One approach involves laser cooling of YbF via the A2P1/2-X2S+ transition. However, it appears that cooling by means of this transition may be limited by the radiative loss of population from the cooling cycle. YbF has low-energy states that arise from the Yb+(4f136s2)F- configuration. Recent theoretical calculations predict (Zhang et al J. Mol. Spectrsc. 386 11625 (2022)) that radiative decay from A2Π1/2 to the 4f136s2 states occurs with a branching fraction of approximately 10-3. In the present study we have used dispersed laser induced fluorescence spectroscopy to the observe the lowest energy 4f136s2 states. These measurements were carried out using excitation of previously unobserved YbF transitions in the near UV spectral range. An accurate ionization energy (IE) for YbF is also reported. A two-color photoionization technique was used to determine the IE and observe the v+=0-3 vibrational levels of YbF+ X1S+.
Asymmetric switching behavior in perpendicularly magnetized spin-valve nanopillars due to the polarizer dipole field
Creators: name: Gopman, Daniel B.
name: Bedau, Daniel
name: Mangin, Stephane
name: Lambert, C. H.
name: Fullerton, Eric E.
name: Katine, Jordan A.
name: Kent, Andrew D.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report the free layer switching field distributions of spin-valve nanopillars with perpendicular magnetization. While the distributions are consistent with a thermal activation model, they show a strong asymmetry between the parallel to antiparallel and the reverse transition, with energy barriers more than 50% higher for the parallel to antiparallel transitions. The inhomogeneous dipolar field from the polarizer is demonstrated to be at the origin of this symmetry breaking. Interestingly, the symmetry is restored for devices with a lithographically defined notch pair removed from the midpoint of the pillar cross-section along the ellipse long axis. These results have important implications for the thermal stability of perpendicular magnetized MRAM bit cells.
description: Submitted to Applied Physics Letters on November 4, 2011. Consists of 4 pages, 3 figures
Klein-Gordon equation for electrically charged particles with new energy-momentum operator
Creators: name: Kholmetskii, A. L.
name: Yarman, T.
name: Missevitch, O.
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: We address the Klein-Gordon equation for a spinless charged particle in the presence of an electromagnetic (EM) field, and focus on its known shortcoming, related to the existence of solutions with a negative probability density. We disclose a principal way to overcome this shortcoming, using our recent results obtained in the analysis of quantum phase effects for charges and dipoles, which prove the need to abandon the customary definition of the momentum operator for a charged particle in an EM field through its canonical momentum, and to adopt the more general definition of this operator through the sum of mechanical and electromagnetic momenta for the charged particle in an EM field. We show that the ap-plication of the new energy-momentum operator to the Klein-Gordon equation actually eliminates solutions with negative probability density. Some implications of the obtained results are discussed
description: Revised version under consideration in "Proceedings of Royal Society A"
Personalia
Creators: name: Redaktion, Die
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2020

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 26 Nr. 3 (1973): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Prediction of elastic material properties in additively fabricated multimaterials
Creators: name: Kornfellner, Erik
name: Moscato, Francesco
Publisher: name: Transactions on Additive Manufacturing Meets Medicine
Year: 2021

description: The use of multimaterial 3d printers allow not to only shape the geometry but also the material properties of the part being designed. The difficulty for the designer is now to anticipate, what the resulting material properties of the mixture might be. Here a continuum mechanical approach is presented, and how this can be applied to currently used multimaterial printers using photopolymers and its use in a digital design process.
description: Transactions on Additive Manufacturing Meets Medicine, Vol 3 No 1 (2021): Trans. AMMM
Tafeln
Creators: name: Redaktion, Die
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2020

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 26 Nr. 4 (1973): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Cloud Computing Through Mobile-Learning
Creators: name: Rao, N. Mallikharjuna
name: Sasidhar, C.
name: Kumar, V. Sathyendra
Publisher: name: arXiv
Year: 2012
Subjects: subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: Cloud computing is the new technology that has various advantages and it is an adoptable technology in this present scenario. The main advantage of the cloud computing is that this technology reduces the cost effectiveness for the implementation of the Hardware, software and License for all. This is the better peak time to analyze the cloud and its implementation and better use it for the development of the quality and low cost education for all over the world. In this paper, we discuss how to influence on cloud computing and influence on this technology to take education to a wider mass of students over the country. We believe cloud computing will surely improve the current system of education and improve quality at an affordable cost.
Design and manufacturing workflow of a patient specific 3-dimensionally engineered tracheo-bronchial stent
Creators: name: Königshofer, Markus
name: Unger, Ewald
name: Stoiber, Martin
name: Lang, György
name: Schweiger, Thomas
name: Moscato, Francesco
Publisher: name: Transactions on Additive Manufacturing Meets Medicine
Year: 2021

description: Collapsing airway pathologies, such as vanishing bronchus syndrome, are routinely treated by airway stent implantation. Off-the-shelf stents are appropriate for the treatment of most patients. However, in some cases, these commercially available stents do not fit the patient's airway anatomy sufficient, resulting in a high risk for dislocation and infection. In this article, we present a process for design and manufacturing of patient-specific tracheobronchial stents that allows treatment of patients in whom standard treatment is not appropriate.
description: Transactions on Additive Manufacturing Meets Medicine, Vol 3 No 1 (2021): Trans. AMMM
Wikingerzeitliche Waffen- und Reitzubehörfunde aus dem Berliner Bestand der Prussia-Sammlung (ehemals Königsberg/Ostpreußen) und ihre Beziehung zu Skandinavien
Creators: name: Goßler, Norbert
Publisher: name: Acta Praehistorica et Archaeologica
Year: 2020

description: Acta Praehistorica et Archaeologica, Bd. 46 (2014)
Large Field Polynomial Inflation: Parameter Space, Predictions and (Double) Eternal Nature
Creators: name: Drees, Manuel
name: Xu, Yong
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Simple monomial inflationary scenarios have been ruled out by recent observations. In this work we revisit the next simplest scenario, a single--field model where the scalar potential is a polynomial of degree four which features a concave ``almost'' saddle point. We focus on trans--Planckian field values. We reparametrize the potential, which greatly simplifies the procedure for finding acceptbale model parameters. This allows for the first comprehensive scan of parameter space consistent with recent Planck and BICEP/Keck 2018 measurements. Even for trans--Planckian field values the tensor--to--scalar ratio $r$ can be as small as $\mathcal{O}(10^{-8})$, but the model can also saturate the current upper bound. In contrast to the small--field version of this model, radiative stability does not lead to strong constraints on the parameters of the inflaton potential. For very large field values the potential can be approximated by the quartic term; as well known, this allows eternal inflation even for field energy well below the reduced Planck mass $M_{\rm Pl}$, with Hubble parameter $H \sim 10^{-2} M_{\rm Pl}$. More interestingly, we find a region of parameter space that even supports {\em two phases of eternal inflation}. The second epoch only occurs if the slope at the would--be saddle point is very small, and has $H \sim 10^{-5} M_{\rm Pl}$; it can only be realized if $r \sim 10^{-2}$, within the sensitivity range of next--generation CMB observations.
description: V1: 25 pages, 5 figures; V2: references updated, discussion on preheating included, version accepted for publication in JCAP; v3: a typo in footnote 11 corrected
Extreme events in population dynamics with functional carrying capacity
Creators: name: Yukalov, V. I.
name: Yukalova, E. P.
name: Sornette, D.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Biological Physics (physics.bio-ph)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: A class of models is introduced describing the evolution of population species whose carrying capacities are functionals of these populations. The functional dependence of the carrying capacities reflects the fact that the correlations between populations can be realized not merely through direct interactions, as in the usual predator-prey Lotka-Volterra model, but also through the influence of species on the carrying capacities of each other. This includes the self-influence of each kind of species on its own carrying capacity with delays. Several examples of such evolution equations with functional carrying capacities are analyzed. The emphasis is given on the conditions under which the solutions to the equations display extreme events, such as finite-time death and finite-time singularity. Any destructive action of populations, whether on their own carrying capacity or on the carrying capacities of co-existing species, can lead to the instability of the whole population that is revealed in the form of the appearance of extreme events, finite-time extinctions or booms followed by crashes.
description: Latex file, 60 pages, 24 figures
Printing of hard ferromagnetic materials for remote magnetic actuation
Creators: name: Ackers, Justin
name: Bakenecker, Anna
name: Buzug, Thorsten
name: Graeser, Matthias
Publisher: name: Transactions on Additive Manufacturing Meets Medicine
Year: 2021

description: The remote magnetic actuation of untethered devices has great potential for many clinical applications such as drug targeting and precision surgery. 3D printing offers great flexibility in the manufacturing process of these milli- and micro-scale devices. To achieve better functionalization of these devices it is beneficial to directly integrate the desired properties into the printing process. This work focuses on the development and analysis of a magnetic print material. NdFeB microparticles of different concentrations were incorporated into a liquid polymer resin for LCD-based 3D printing. The print quality is investigated and the resulting magnetic properties are analyzed for their suitability to be used for remote magnetic actuation.
description: Transactions on Additive Manufacturing Meets Medicine, Vol 3 No 1 (2021): Trans. AMMM
Adaptation of a commercial Raman spectrometer for multiline and broadband laser operation
Creators: name: Fábián, Gábor
name: Kramberger, Christian
name: Friedrich, Alexander
name: Simon, Ferenc
name: Pichler, Thomas
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A commercial single laser line Raman spectrometer is modified to accommodate multiline and tunable dye lasers, thus combining the high sensitivity of such single monochromator systems with broadband operation. Such instruments rely on high-throughput interference filters that perform both beam alignment and Rayleigh filtering. Our setup separates the dual task of the built-in monochromator into two independent elements: a beam splitter and a long pass filter. Filter rotation shifts the transmission passband, effectively expanding the range of operation. Rotation of the filters has a negligible effect on the optical path, allowing broadband operation and stray light rejection down to 70-150 1/cm. Operation is demonstrated on single-walled carbon nanotubes, for which the setup was optimized.
description: 4 pages, 3 figures, IWEPNM 2011, submitted as conference proceeding to Phys. Stat. Solidi B
Documentation for the 2014 TCCON Data Release
Creators: name: Wunch, Debra
name: Toon, Geoffrey C
name: Sherlock, Vanessa
name: Deutscher, Nicholas M
name: Liu, Cate
name: Feist, Dietrich G
name: Wennberg, Paul O
Publisher: name: CaltechDATA
Year: 2015
Subjects: TCCON
Documentation

description: The Total Carbon Column Observing Network (TCCON) is a network of ground-based Fourier Transform Spectrometers that record direct solar absorption spectra of the atmosphere in the near-infrared. From these spectra, accurate and precise column-averaged abundances of atmospheric constituents including CO2, CH4, N2O, HF, CO, H2O, and HDO, are retrieved. This is documentation for the 2014 TCCON Data Release.
description:
Cite this record as:
Wunch, D., Toon, G. C., Sherlock, V., Deutscher, N. M., Liu, C., Feist, D. G., & Wennberg, P. O. (2017). Documentation for the 2014 TCCON Data Release. CaltechDATA. https://doi.org/10.14291/tccon.ggg2014.documentation.r0/1221662
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