cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Revisiting Groeneveld's approach to the virial expansion
Creators: name: Jansen, Sabine
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 82B05, 05A15

description: A generalized version of Groeneveld's convergence criterion for the virial expansion and generating functionals for weighted $2$-connected graphs is proven. The criterion works for inhomogeneous systems and yields bounds for the density expansions of the correlation functions $ρ_s$ (a.k.a. distribution functions or factorial moment measures) of grand-canonical Gibbs measures with pairwise interactions. The proof is based on recurrence relations for graph weights related to the Kirkwood-Salsburg integral equation for correlation functions. The proof does not use an inversion of the density-activity expansion, however a Moebius inversion on the lattice of set partitions enters the derivation of the recurrence relations.
description: 25 pages
Comparing Different Approaches for Stellar Intensity Interferometry
Creators: name: Karl, Sebastian
name: Zmija, Andreas
name: Richter, Stefan
name: Vogel, Naomi
name: Malyshev, Dmitry
name: Zink, Adrian
name: Michel, Thilo
name: Anton, Gisela
name: von Zanthier, Joachim
name: Funk, Stefan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Stellar intensity interferometers correlate photons within their coherence time and could overcome the baseline limitations of existing amplitude interferometers. Intensity interferometers do not rely on phase coherence of the optical elements and thus function without high grade optics and light combining delay lines. However, the coherence time of starlight observed with realistic optical filter bandwidths (> 0.1 nm) is usually much smaller than the time resolution of the detection system (> 10 ps), resulting in a greatly reduced correlation signal. Reaching high signal to noise in a reasonably short measurement time can be achieved in different ways: either by increasing the time resolution, which increases the correlation signal height, or by increasing the photon rate, which decreases statistical uncertainties of the measurement. We present laboratory measurements employing both approaches and directly compare them in terms of signal to noise ratio. A high time-resolution interferometry setup designed for small to intermediate size optical telescopes and thus lower photon rates (diameters < some meters) is compared to a setup capable of measuring high photon rates, which is planned to be installed at Cherenkov telescopes with dish diameters of > 10 m. We use a Xenon lamp as a common light source simulating starlight. Both setups measure the expected correlation signal and work at the expected shot-noise limit of statistical uncertainties for measurement times between 10 min and 23 h. We discuss the quantitative differences in the measurement results and give an overview of suitable operation regimes for each of the interferometer concepts.
description: submitted to MNRAS
Ferromagnetic phase transition for the spanning-forest model (q \to 0 limit of the Potts model) in three or more dimensions
Creators: name: Deng, Youjin
name: Garoni, Timothy M.
name: Sokal, Alan D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Lattice (hep-lat)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We present Monte Carlo simulations of the spanning-forest model (q \to 0 limit of the ferromagnetic Potts model) in spatial dimensions d=3,4,5. We show that, in contrast to the two-dimensional case, the model has a "ferromagnetic" second-order phase transition at a finite positive value w_c. We present numerical estimates of w_c and of the thermal and magnetic critical exponents. We conjecture that the upper critical dimension is 6.
description: LaTex2e, 4 pages; includes 6 Postscript figures; Version 2 has expanded title as published in PRL
Understanding Immune Suppression in Patients with Chronic Hepatitis C Virus Infections
Creators: name: Okwor, Chisom Ifeoma Adaeze
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2021
Subjects: Hepatitis C virus
Liver fibrosis
Direct acting antivirals
Immunosuppression
Natural killer cells
T cells
Inhibitory receptors
Galectin-9

description: Hepatitis C Virus (HCV) is a small RNA virus that progresses to chronicity in 50-80% of infected individuals. Direct-acting antivirals (DAAs) are revolutionary treatments for HCV with 90-98% cure rates. However, over time, chronic HCV infections can result in advanced liver disease, including cirrhosis. Patients with advanced fibrosis experience a poor response to vaccination, recurrent infections and increased risk for hepatocellular carcinoma (HCC). These outcomes are, in part, a consequence of immune dysfunction. Increased inhibitory receptor and Galectin-9 (GAL-9) expression is a possible mechanism promoting lymphocyte dysfunction. In this study, blood samples were collected from chronic HCV patients with different degrees of liver fibrosis. I conducted a 13-parameter flow stain on the peripheral blood mononuclear cells (PBMC) of these patients. Next, I measured the expression of inhibitory receptors (PD-1, CTLA-4, LAG-3, TIGIT and TIM-3) and GAL-9 on bulk T cell and NK cells of 15 chronic HCV patients with no to moderate fibrosis (F0-F2) and 15 with advanced fibrosis (F3-F4). To analyze receptor co-expression, I employed t-distributed stochastic neighbor embedding (t-SNE) analysis to dimensionally reduce the multi-parametric data. Notably, I found that F3-F4 patients had higher frequencies of >3 inhibitory receptor co-expression on NK cells. Moreover, t-SNE analysis of bulk T cells revealed that F3-F4 patients manifest a higher frequency of cells in the clusters with CD25+TIGITmed-hi CD4+ T cells and PD-1medLAG-3med-hiGAL-9med-hi CD4+ T cells. t-SNE analysis of NK cells also showed that F3-F4 patients manifest a higher frequency of cells in the cluster with CD25+TIGITmed-hiTIM-3med-hi CD56Dim NK cells and CCR7+ PD-1medLAG-3med-hiGAL-9med-hi CD56Dim NK cells. Lastly, the frequency of cells in these clusters was found to positively correlate with patient’s extent of liver damage. In conclusion, I identified phenotypes of immune dysregulation that could explain the increased susceptibility to infection and HCC in chronic HCV patients with advanced fibrosis. These phenotypes could identify targets for combinatorial checkpoint blockade therapy to potentially improve immune function in these patients.
Spot patterns and differential rotation in the eclipsing pre-CV binary,V471 Tau
Creators: name: Hussain, G. A. J.
name: Prieto, C. Allende
name: Saar, S. H.
name: Still, M. D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present surface spot maps of the K2V primary star in the pre-cataclysmic variable binary system, V471 Tau. The spot maps show the presence of large high latitude spots located at the sub-white dwarf longitude region. By tracking the relative movement of spot groups over the course of four nights (eight rotation cycles), we measure the surface differential rotation rate of the system.Our results reveal that the star is rotating rigidly with a surface shear rate, dOmega = 1.6 +/- 6 mrad/d. The single active star AB Dor has a similar spectral type, rotation period, and activity level as the K star in V471 Tau but displays much stronger surface shear (46 < dOmega < 58 mrad/d). Our results suggest that tidal locking may inhibit differential rotation; this reduced shear, however, does not affect the overall magnetic activity levels in active K dwarfs.
description: 12 pages, 9 figures, accepted by MNRAS
Spreading of infectious diseases on heterogeneous populations: multi-type network approach
Creators: name: Vazquez, Alexei
Publisher: name: arXiv
Year: 2006
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: I study the spreading of infectious diseases on heterogeneous populations. I represent the population structure by a contact-graph where vertices represent agents and edges represent disease transmission channels among them. The population heterogeneity is taken into account by the agent's subdivision in types and the mixing matrix among them. I introduce a type-network representation for the mixing matrix allowing an intuitive understanding of the mixing patterns and the analytical calculations. Using an iterative approach I obtain recursive equations for the probability distribution of the outbreak size as a function of time. I demonstrate that the expected outbreak size and its progression in time are determined by the largest eigenvalue of the reproductive number matrix and the characteristic distance between agents on the contact-graph. Finally, I discuss the impact of intervention strategies to halt epidemic outbreaks. This work provides both a qualitative understanding and tools to obtain quantitative predictions for the spreading dynamics on heterogeneous populations.
description: 28 pages, 4 figures
Particulate Matter Exposure at a Densely Populated Urban Traffic Intersection and Crosswalk
Creators: name: Hea, Hong-di
name: Gao, H. Oliver
Publisher: name: arXiv
Year: 2020
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: Exposure to elevated particulate matter pollution is of great concern to both the general public and air quality management agencies. At urban traffic intersections, for example, pedestrians are often at a higher risk of exposure to near-source PM pollution from traffic while waiting on the roadside or while walking in the crosswalk. This study offers an in-depth investigation of pedestrian exposure to PM pollution at an urban traffic intersection. Fixed-site measurements near an urban intersection were conducted to examine the variations in particles of various sizes through traffic signal cycles. This process aids in the identification of major PM dispersion patterns on the roadside. In addition, mobile measurements of pedestrian exposure to PM were conducted across six time intervals that correspond to different segments of a pedestrian's journey when passing through the intersection. Measurement results are used to estimate and compare the cumulative deposited doses of PM by size categories and journey segments for pedestrians at an intersection. Furthermore, comparisons of pedestrian exposure to PM on a sunny day and a cloudy day were analyzed. The results indicate the importance of reducing PM pollution at intersections and provide policymakers with a foundation for possible measures to reduce pedestrian PM exposure at urban traffic intersections.
Enhanced Ferromagnetism of CrI3 Bilayer by Self-Intercalation
Creators: name: Guo, Yu
name: Liu, Nanshu
name: Zhao, Yanyan
name: Jiang, Xue
name: Zhou, Si
name: Zhao, Jijun
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Two-dimensional (2D) ferromagnets with high Curie temperature have long been the pursuit for electronic and spintronic applications. CrI3 is a rising star of intrinsic 2D ferromagnets, however, it suffers from weak exchange coupling. Here we propose a general strategy of self-intercalation to achieve enhanced ferromagnetism in bilayer CrI3. We showed that filling either Cr or I atoms into the van der Waals gap of stacked and twisted CrI3 bilayers can induce the double exchange effect and significantly strengthen the interlayer ferromagnetic coupling. According to our first-principles calculations, the intercalated native atoms act as covalent bridge between two CrI3 layers and lead to discrepant oxidation states for the Cr atoms. These theoretical results offer a facile route to achieve high-Curie-temperature 2D magnets for device implementation.
Impact of Response Latency on User Behaviour in Mobile Web Search
Creators: name: Arapakis, Ioannis
name: Park, Souneil
name: Pielot, Martin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Retrieval (cs.IR)
subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Traditionally, the efficiency and effectiveness of search systems have both been of great interest to the information retrieval community. However, an in-depth analysis of the interaction between the response latency and users' subjective search experience in the mobile setting has been missing so far. To address this gap, we conduct a controlled study that aims to reveal how response latency affects mobile web search. Our preliminary results indicate that mobile web search users are four times more tolerant to response latency reported for desktop web search users. However, when exceeding a certain threshold of 7-10 sec, the delays have a sizeable impact and users report feeling significantly more tensed, tired, terrible, frustrated and sluggish, all which contribute to a worse subjective user experience.
description: In Proceedings of the 2021 ACM SIGIR Conference on Human Information Interaction and Retrieval (CHIIR '21), March 14-19, 2021, Canberra, Australia
Entanglement purification and protection in a superconducting quantum network
Creators: name: Yan, Haoxiong
name: Zhong, Youpeng
name: Chang, Hung-Shen
name: Bienfait, Audrey
name: Chou, Ming-Han
name: Conner, Christopher R.
name: Dumur, Étienne
name: Grebel, Joel
name: Povey, Rhys G.
name: Cleland, Andrew N.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: High-fidelity quantum entanglement is a key resource for quantum communication and distributed quantum computing, enabling quantum state teleportation, dense coding, and quantum encryption. Any sources of decoherence in the communication channel however degrade entanglement fidelity, thereby increasing the error rates of entangled state protocols. Entanglement purification provides a method to alleviate these non-idealities, by distilling impure states into higher-fidelity entangled states. Here we demonstrate the entanglement purification of Bell pairs shared between two remote superconducting quantum nodes connected by a moderately lossy, 1-meter long superconducting communication cable. We use a purification process to correct the dominant amplitude damping errors caused by transmission through the cable, with fractional increases in fidelity as large as $25\%$, achieved for higher damping errors. The best final fidelity the purification achieves is $94.09\pm 0.98\%$. In addition, we use both dynamical decoupling and Rabi driving to protect the entangled states from local noise, increasing the effective qubit dephasing time by a factor of 4, from $3~\rm μs$ to $12~\rmμs$. These methods demonstrate the potential for the generation and preservation of very high-fidelity entanglement in a superconducting quantum communication network.
Sub-Alfvenic Solar Wind observed by PSP: Characterization of Turbulence, Anisotropy, Intermittency, and Switchback
Creators: name: Bandyopadhyay, R.
name: Matthaeus, W. H.
name: McComas, D. J.
name: Chhiber, R.
name: Usmanov, A. V.
name: Huang, J.
name: Livi, R.
name: Larson, D. E.
name: Kasper, J. C.
name: Case, A. W.
name: Stevens, M.
name: Whittlesey, P.
name: Romeo, O. M.
name: Bale, S. D.
name: Bonnell, J. W.
name: de Wit, T. Dudok
name: Goetz, K.
name: Harvey, P. R.
name: MacDowall, R. J.
name: Malaspina, D. M.
name: Pulupa, M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Space Physics (physics.space-ph)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: In the lower solar coronal regions where the magnetic field is dominant, the Alfven speed is much higher than the wind speed. In contrast, the near-Earth solar wind is strongly super-Alfvenic, i.e., the wind speed greatly exceeds the Alfven speed. The transition between these regimes is classically described as the "Alfven point" but may in fact occur in a distributed Alfven critical region. NASA's Parker Solar Probe (PSP) mission has entered this region, as it follows a series of orbits that gradually approach more closely to the sun. During its 8th and 9th solar encounters, at a distance of 16 solar radii from the Sun, PSP sampled four extended periods in which the solar wind speed was measured to be smaller than the local Alfven speed. These are the first in-situ detections of sub-Alfvenic solar wind in the inner heliosphere by PSP. Here we explore properties of these samples of sub-Alfvenic solar wind, which may provide important previews of the physical processes operating at lower altitude. Specifically, we characterize the turbulence, anisotropy, intermittency, and directional switchback properties of these sub-Alfvenic winds and contrast these with the neighboring super-Alfvenic periods.
description: Accepted for publication in the Astrophysical Journal Letter
Information content in the halo-model dark-matter power spectrum II: Multiple cosmological parameters
Creators: name: Neyrinck, Mark C.
name: Szapudi, István
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate the cosmological Fisher information in the non-linear dark-matter power spectrum in the context of the halo model. We find that there is a plateau in information content on translinear scales which is generic to all cosmological parameters we tried. There is a rise in information on smaller scales, but we find that it is quite degenerate among different cosmological parameters (except, perhaps, the tilt). This suggests that it could be difficult to constrain cosmological parameters using the non-linear regime of the dark-matter power spectrum. We suggest ways to get around this problem, such as removing the largest haloes from consideration in survey analysis.
description: 6 pages, 4 figures (1 clarified), MNRAS Letters, in press. Minor changes, suggested by referee
On the Block Error Probability of LP Decoding of LDPC Codes
Creators: name: Koetter, Ralf
name: Vontobel, Pascal O.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In his thesis, Wiberg showed the existence of thresholds for families of regular low-density parity-check codes under min-sum algorithm decoding. He also derived analytic bounds on these thresholds. In this paper, we formulate similar results for linear programming decoding of regular low-density parity-check codes.
Coherent transfer matrix analysis of the transmission spectra of Rydberg excitons in Cuprous Oxide
Creators: name: Stolz, Heinrich
name: Schwartz, Rico
name: Heckötter, Julian
name: Aßmann, Marc
name: Semkat, Dirk
name: Krüger, Sjard O.
name: Bayer, Manfred
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In this study we analyze the transmission spectrum of a thin plate of Cuprous Oxide in the range of the absorption of the yellow exciton states with the coherent transfer matrix method. We demonstrate that, in contrast to the usual analysis using Beer's law, which turns out to be a rather good approximation only in the spectral region of high principal quantum numbers, a consistent quantitative description over the whole spectral range under consideration is possible. This leads to new and more accurate parameters not only for the Rydberg exciton states, but also for the strengths of indirect transitions. Furthermore, the results have consequences on the determination of the density of electron-hole pairs after optical excitation.
Framing pluralism: a reconfiguration of the Robson Square complex in downtown Vancouver, British Columbia
Creators: name: Bligh, Christopher Graham
Publisher: name: University of British Columbia
Year: 2009

description: This thesis addresses the question of how a dialogue may be developed between the socio-political notion of pluralism and a pluralistic public sphere, and the design of public space and public architecture. More particularly, it considers how architecture may both accommodate multiple publics while simultaneously framing connection or association between them. Following an exploration of this question at an abstract, theoretical level, the thesis moves to a more specific architectural investigation. This investigation takes the form of a design project situated within the Robson Square complex in downtown Vancouver. The complex, constructed in the mid-1970's, was designed by Canada's pre-eminent architect Arthur Erickson and is the major civic space in the city. The thesis design project undertakes a theoretical re-evaluation and physical renovation of this Utopian mega-structure, with the intention of shifting the existing homogeneity and institutionality of the complex to align it with the thesis argument. Through the vehicle of a design project,, the abstract theoretical argument is translated and focused through the particularities of an architecture embedded in its site. This methodology requires the project to address issues connected to the existing masterwork, including: the question of how to conceptualize monumentally in a grid city; the relationship between the 'sacred' space of the civic circumstance and the 'profane' space of the street and commercial program; the form of the institution within the city; and the issue of working within, and manipulating, a pre-existing architectural language. Further, the scale of the site is reflected in the scope of the design project. The project moves from the development of urban design strategies to the detailed consideration of the material and construction of the different interventions. The architecture remains, however, conceptual and is a demonstration of how the developed strategies may generate form and guide program. The project does not attempt to fully develop a building in detail. The thesis concludes with an afterword on the success of the project as a demonstration of the thesis argument. At the same time, the limits of architecture to act as a socio-political device are acknowledged. Further, speculations are made as to the way in which the position and the strategies developed within the thesis might inform wider discussions on architecture and the urbanism of grid cities such as Vancouver. The key concept forming the basis of these speculations is the idea of a 'difficult' co-existence of parts and a whole, reflecting the pluralistic ideal of association within fragmentation.
My Mouse, My Rules: Privacy Issues of Behavioral User Profiling via Mouse Tracking
Creators: name: Leiva, Luis A.
name: Arapakis, Ioannis
name: Iordanou, Costas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: This paper aims to stir debate about a disconcerting privacy issue on web browsing that could easily emerge because of unethical practices and uncontrolled use of technology. We demonstrate how straightforward is to capture behavioral data about the users at scale, by unobtrusively tracking their mouse cursor movements, and predict user's demographics information with reasonable accuracy using five lines of code. Based on our results, we propose an adversarial method to mitigate user profiling techniques that make use of mouse cursor tracking, such as the recurrent neural net we analyze in this paper. We also release our data and a web browser extension that implements our adversarial method, so that others can benefit from this work in practice.
description: In Proceedings of the 2021 ACM SIGIR Conference on Human Information Interaction and Retrieval (CHIIR '21), March 14-19, 2021, Canberra, Australia
Sale Information on Bellevue Ranche, Sent by [J.E.McAllister] to [James Goldie] with letter, August 26, 1911
Creators: name: McAllister, John Edgar
Publisher: name: The University of British Columbia
Year: 2017

description: Sale information on Bellevue Ranche, sent by McAllister with another letter to James Goldie date August 26, 1911.
A Reinforcement Learning Approach to Health Aware Control Strategy
Creators: name: Jha, Mayank Shekhar
name: Weber, Philippe
name: Theilliol, Didier
name: Ponsart, Jean-Christophe
name: Maquin, Didier
Publisher: name: arXiv
Year: 2020
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Health-aware control (HAC) has emerged as one of the domains where control synthesis is sought based upon the failure prognostics of system/component or the Remaining Useful Life (RUL) predictions of critical components. The fact that mathematical dynamic (transition) models of RUL are rarely available, makes it difficult for RUL information to be incorporated into the control paradigm. A novel framework for health aware control is presented in this paper where reinforcement learning based approach is used to learn an optimal control policy in face of component degradation by integrating global system transition data (generated by an analytical model that mimics the real system) and RUL predictions. The RUL predictions generated at each step, is tracked to a desired value of RUL. The latter is integrated within a cost function which is maximized to learn the optimal control. The proposed method is studied using simulation of a DC motor and shaft wear.
Remarks on Fourier multipliers and applications to the Wave equation
Creators: name: Cordero, Elena
name: Nicola, Fabio
Publisher: name: arXiv
Year: 2008
Subjects: subject: Analysis of PDEs (math.AP)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 42B15, 35C15

description: Exploiting continuity properties of Fourier multipliers on modulation spaces and Wiener amalgam spaces, we study the Cauchy problem for the NLW equation. Local wellposedness for rough data in modulation spaces and Wiener amalgam spaces is shown. The results formulated in the framework of modulation spaces refine those in [3]. The same arguments may apply to obtain local wellposedness for the NLKG equation.
description: 13 pages
The VISCACHA survey -- IV. The SMC West Halo in 8D
Creators: name: Dias, B.
name: Parisi, M. C.
name: Angelo, M.
name: Maia, F.
name: Oliveira, R. A. P.
name: Souza, S. O.
name: Kerber, L. O.
name: Santos, J. F. C.
name: Pérez-Villegas, A.
name: Sanmartim, D.
name: Quint, B.
name: Fraga, L.
name: Barbuy, B.
name: Bica, E.
name: Santrich, O. J. Katime
name: Hernandez-Jimenez, J. A.
name: Geisler, D.
name: Minniti, D.
name: De Bórtoli, B. J.
name: Bassino, L. P.
name: Rocha, J. P.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The structure of the Small Magellanic Cloud (SMC) is very complex, in particular in the periphery that suffers more from the interactions with the Large Magellanic Cloud (LMC). A wealth of observational evidence has been accumulated revealing tidal tails and bridges made up of gas, stars and star clusters. Nevertheless, a full picture of the SMC outskirts is only recently starting to emerge with a 6D phase-space map plus age and metallicity using star clusters as tracers. In this work, we continue our analysis of another outer region of the SMC, the so-called West Halo, and combined it with the previously analysed Northern Bridge. We use both structures to define the Bridge and Counter-bridge trailing and leading tidal tails. These two structures are moving away from each other, roughly in the SMC-LMC direction. The West Halo form a ring around the SMC inner regions that goes up to the background of the Northern Bridge shaping an extended layer of the Counter-bridge. Four old Bridge clusters were identified at distances larger than 8 kpc from the SMC centre moving towards the LMC, which is consistent with the SMC-LMC closest distance of 7.5 kpc when the Magellanic Bridge was formed about 150Myr ago; this shows that the Magellanic Bridge was not formed only by pulled gas, but it also removed older stars from the SMC during its formation. We also found age and metallicity radial gradients using projected distances on sky, which are vanished when we use the real 3D distances.
description: 14 pages, 8 figures + appendix. Accepted for publication in MNRAS
Unified description of correlations in double quantum dots
Creators: name: Kashcheyevs, Vyacheslavs
name: Schiller, Avraham
name: Aharony, Amnon
name: Entin-Wohlman, Ora
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The two-level model for a double quantum dot coupled to two leads, which is ubiquitously used to describe charge oscillations, transmission-phase lapses and correlation-induced resonances, is considered in its general form. The model features arbitrary tunnelling matrix elements among the two levels and the leads and between the levels themselves (including the effect of Aharonov-Bohm fluxes), as well as inter-level repulsive interactions. We show that this model is exactly mapped onto a generalized Anderson model of a single impurity, where the electrons acquire a pseudo-spin degree of freedom, which is conserved by the tunnelling but not within the dot. Focusing on the local-moment regime where the dot is singly occupied, we show that the effective low-energy Hamiltonian is that of the anisotropic Kondo model in the presence of a tilted magnetic field. For moderate values of the (renormalized) field, the Bethe ansatz solution of the isotropic Kondo model allows us to derive accurate expressions for the dot occupation numbers, and henceforth its zero-temperature transmission. Our results are in excellent agreement with those obtained from the Bethe ansatz for the isotropic Anderson model, and with the functional and numerical renormalization-group calculations of Meden and Marquardt [Phys. Rev. Lett. 96, 146801 (2006)], which are valid for the general anisotropic case. In addition we present highly accurate estimates for the validity of the Schrieffer-Wolff transformation (which maps the Anderson Hamiltonian onto the low-energy Kondo model) at both the high- and low-magnetic field limits. Perhaps most importantly, we provide a single coherent picture for the host of phenomena to which this model has been applied.
description: 23 pages, 7 figures
Chemical freeze-out of light nuclei in high energy nuclear collisions and resolution of the hyper-triton chemical freeze-out puzzle
Creators: name: Bugaev, K. A.
name: Vitiuk, O. V.
name: Grinyuk, B. E.
name: Yakovenko, N. S.
name: Zherebtsova, E. S.
name: Sagun, V. V.
name: Ivanytskyi, O. I.
name: Savchenko, D. O.
name: Bravina, L. V.
name: Blaschke, D. B.
name: Farrar, G. R.
name: Kabana, S.
name: Kuleshov, S. V.
name: Nikonov, E. G.
name: Taranenko, A. V.
name: Zabrodin, E. E.
name: Zinovjev, G. M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a summary of the recent results obtained with the novel hadron resonance gas model with the multicomponent hard-core repulsion which is extended to describe the mixtures of hadrons and light (anti-, hyper-)nuclei. A very accurate description is obtained for the hadronic and the light nuclei data measured by STAR at the collision energy $\sqrt{s_{NN}} =200$ GeV and by ALICE at $\sqrt{s_{NN}} =2.76$ TeV. The most striking result discussed here is that for the most probable chemical freeze-out scenario for the STAR energy the found parameters allow us to reproduce the values of the experimental ratios $S_3$ and $\overline{S}_3$ without fitting.
description: 6 pages, 3 figures
ความไว้วางใจในการประมูลสินค้าออนไลน์
Creators: name: ดลไพสิทธิ์ อุปพงษ์
name: ปวีณา คำพุกกะ
Publisher: name: สถาบันการจัดการปัญญาภิวัฒน์
Year: 2558
Subjects: ความดึงดูดใจทางด้านความงาม, แผนงานและความสามารถในการทำแผนงาน, ความปลอดภัยทางการเงิน, ความไว้วางใจ, การประมูลสินค้าออนไลน์

description: พิเศษ, 7, วารสารปัญญาภิวัฒน์
แบบจำลองการประยุกต์ใช้ปรัชญาเศรษฐกิจพอเพียงของนักศึกษาคณะบริหารศาสตร์ มหาวิทยาลัยอุบลราชธานี
Creators: name: บุษกร คำโฮม
name: ศุภกัญญา จันทรุกขา
Publisher: name: สถาบันการจัดการปัญญาภิวัฒน์
Year: 2558
Subjects: ประยุกต์ใช้ปรัชญาเศรษฐกิจพอเพียง, แบบจำลองสมการโครงสร้าง

description: พิเศษ, 7, วารสารปัญญาภิวัฒน์
Gravity or turbulence V: Star forming regions undergoing violent relaxation
Creators: name: Bonilla-Barroso, Andrea
name: Ballesteros-Paredes, J.
name: Hernández, Jesus
name: Aguilar, Luis
name: Zamora, Manuel
name: Hartmann, Lee W.
name: Kuznetsova, Aleksandra
name: Camacho, Vianey
name: Lora, Verónica
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Using numerical simulations of the formation and evolution of stellar clusters within molecular clouds, we show that the stars in clusters formed within collapsing molecular cloud clumps exhibit a constant velocity dispersion regardless of their mass, as expected in a violent relaxation processes. In contrast, clusters formed in turbulence-dominated environments exhibit an {\it inverse} mass segregated velocity dispersion, where massive stars exhibit larger velocity dispersions than low-mass cores, consistent with massive stars formed in massive clumps, which in turn, are formed through strong shocks. We furthermore use Gaia EDR3 to show that the stars in the Orion Nebula Cluster exhibit a constant velocity dispersion as a function of mass, suggesting that it has been formed by collapse within one free-fall time of its parental cloud, rather than in a turbulence-dominated environment during many free-fall times of a supported cloud. Additionally, we have addressed several of the criticisms of models of collapsing star forming regions: namely, the age spread of the ONC, the comparison of the ages of the stars to the free-fall time of the gas that formed it, the star formation efficiency, and the mass densities of clouds vs the mass densities of stellar clusters, showing that observational and numerical data are consistent with clusters forming in clouds undergoing a process of global, hierarchical and chaotic collapse, rather than been supported by turbulence.
description: Accepted for publication in MNRAS
Tell Us What You Want, What You Really Really Want ... From The PID Forum
Creators: name: Meadows, Alice
name: Braukmann, Ricarda
name: Cousijn, Helena
name: Lammey, Rachael
name: Madden, Frances
Publisher: name: Zenodo
Year: 2021
Subjects: PID Forum
PIDapalooza
persistent identifiers
open research infrastructure

description: Where do you go for your PID news? Where do you interact with your PID colleagues? Where do you ask your PID questions? The answer is — or should be! — the PID Forum!

 As pidforum.org starts a new phase of life with its new host, NISO, following the conclusion of the FREYA Project, we want to hear how we can make it even more useful for all you PID people out there! This interactive session will enable you to tell us what you think of the changes so far, what else you’d like us to focus on, and how you’d like to get involved in the PID Forum 2.0.
Bounds on the Threshold of Linear Programming Decoding
Creators: name: Vontobel, Pascal O.
name: Koetter, Ralf
Publisher: name: arXiv
Year: 2006
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Whereas many results are known about thresholds for ensembles of low-density parity-check codes under message-passing iterative decoding, this is not the case for linear programming decoding. Towards closing this knowledge gap, this paper presents some bounds on the thresholds of low-density parity-check code ensembles under linear programming decoding.
Coupling Constant for $\mathbf{N^*(1535)Nρ}$
Creators: name: Xie, Ju-Jun
name: Wilkin, Colin
name: Zou, Bing-Song
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The value of the $N^*(1535)Nρ$ coupling constant $g_{N^*Nρ}$ derived from the $N^*(1535) \to Nρ\to N ππ$ decay is compared with that deduced from the radiative decay $N^*(1535) \to N γ$ using the vector-meson-dominance model. On the basis of an effective Lagrangian approach, we show that the value of $g_{N^*Nρ}$ extracted from the available experimental data on the two decays are consistent, though the error bars are rather large.
description: 4 pages, 4 figures. To appear in Phys. Rev. C
Letter from J.E. McAllister to Jim [James] McAllister, September 15, 1911
Creators: name: McAllister, John Edgar
Publisher: name: The University of British Columbia
Year: 2017

description: Letter to James Goldie from J.E. McAllister, dated September 15, 1911, regarding previous letters sent to him containing a description of Bellevue and receipt for money invested in Bellevue and Rainbow Ranche.
Quiver representations of maximal rank type and an application to representations of a quiver with three vertices
Creators: name: Wiedemann, Marcel
Publisher: name: arXiv
Year: 2008
Subjects: subject: Representation Theory (math.RT)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 16G20

description: We introduce the notion of ''maximal rank type'' for representations of quivers, which requires certain collections of maps involved in the representation to be of maximal rank. We show that real root representations of quivers are of maximal rank type. By using the maximal rank type property and universal extension functors we construct all real root representations of a particular wild quiver with three vertices. From this construction it follows that real root representations of this quiver are tree modules. Moreover, formulae given by Ringel can be applied to compute the dimension of the endomorphism ring of a given real root representation.
description: 13 pages
Quantized electrochemical transport in Weyl semimetals
Creators: name: Flores-Calderón, R.
name: Martín-Ruiz, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We show that under the effect of an external electric field and a gradient of chemical potential, a topological electric current can be induced in Weyl semimetals without inversion and mirror symmetries. We derive analytic expressions for the nonlinear conductivity tensor and show that it is nearly quantized for small tilting when the Fermi levels are close to the Weyl nodes. When the van Hove point is much larger than the largest Fermi level, the band structure is described by two linearly dispersing Weyl fermions with opposite chirality. In this case, the electrochemical response is fully quantized in terms of fundamental constants and the scattering time, and it can be used to measure directly the topological charge of Weyl points. We show that the electrochemical chiral current may be derived from an electromagnetic action similar to axion electrodynamics, where the position-dependent chiral Fermi level plays the role of the axion field. This posits our results as a direct consequence of the chiral anomaly.
description: 13 pages, 8 figures. To be published in PRB
title: Судьбы ученых в эпоху перемен: Очерки и документы
Creators: name: Груздева (ред.), Е. Н.
Publisher: name: Реноме
Year: 2021

description: В сборник включены статьи, посвященные малоизвестным сюжетам биографий российских ученых — как занявших свое место в науке в конце XIX — начале ХХ в., так и тех, чья деятельность разворачивалась уже в советское время; публикуются выдержки из писем петербургских этнографов начала 1920-х гг., рисующие картины трудовых будней молодых советских ученых; отмечены периоды подъемов и спадов интенсивности славистических исследований во времена социальной и политической нестабильности.
		Сборник предназначен для широкого круга читателей, интересующихся историей российской науки.
The Nature of the Variable Galactic Center Source GCIRS 16SW Revisited: A Massive Eclipsing Binary
Creators: name: Peeples, Molly S.
name: Bonanos, A. Z.
name: DePoy, D. L.
name: Stanek, K. Z.
name: Pepper, J.
name: Pogge, Richard W.
name: Pinsonneault, M. H.
name: Sellgren, K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a re-analysis of our H- and K-band photometry and light-curves for GCIRS 16SW, a regular periodic source near the Galactic center. These data include those presented by DePoy et al. (2004); we correct a sign error in their reduction, finding GCIRS 16SW to be an eclipsing binary with no color variations. We find the system to be an equal mass overcontact binary (both stars overfilling their Roche lobes) in a circular orbit with a period P=19.4513 days, an inclination angle i=71 degrees. This confirms and strengthens the findings of Martins et al. (2006) that GCIRS 16SW is an eclipsing binary composed of two ~50Msun stars, further supporting evidence of recent star formation very close to the Galactic center. Finally, the calculated luminosity of each component is close to the Eddington luminosity, implying that the temperature of 24400 K given by Najarro et al. (1997) might be overestimated for these evolved stars.
description: 11 pages, 3 figures, accepted by ApJL; v2 includes a figure showing lack of H-K color variation
Hennings, Emmy: Die Schmerzhafte Mutter (Mater Dolorosa) / Die Schmerzensreiche Mutter (2 Fassungen) / Hennings, Emmy:  Die Schmerzensreiche Mutter (Fassung B)
Creators: name: Ball-Hennings, Emmy
Publisher: name: [s.n.]
Year: 2024

description: Dokument
Magnetizing the universe
Creators: name: Subramanian, Kandaswamy
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The origin of cosmic magnetism is an issue of fundamental importance in astrophysics. We review here some of the ideas of how large scale magnetic fields in the universe, particularly in galaxies and galaxy clusters could arise. The popular paradigm involves the generation of a seed magnetic field followed by turbulent dynamo amplification of the seed field. We first outline various seed field generation mechanisms including Biermann batteries. These in general give a field much smaller than the observed field and so they require further amplification by dynamo action. The basic idea behind fluctuation dynamos, as applied to cluster magnetism and the mean-field helical dynamo as applied to disk galaxies, are outlined. Major difficulties with the dynamo paradigm are considered. It is particularly important to understand the nonlinear saturation of dynamos, and whether the fields produced are coherent enough on large-scales to explain the observed fields in galaxies and clusters. At the same time the alternative possibility of a primordial field lacks firm theoretical support but can have very interesting observational consequences.
description: 16 pages, To appear in the proceedings of "From Planets to Dark Energy: the Modern Radio Universe", eds. R. Beswick et al., published by PoS
Towards Low-Complexity Linear-Programming Decoding
Creators: name: Vontobel, Pascal O.
name: Koetter, Ralf
Publisher: name: arXiv
Year: 2006
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: We consider linear-programming (LP) decoding of low-density parity-check (LDPC) codes. While it is clear that one can use any general-purpose LP solver to solve the LP that appears in the decoding problem, we argue in this paper that the LP at hand is equipped with a lot of structure that one should take advantage of. Towards this goal, we study the dual LP and show how coordinate-ascent methods lead to very simple update rules that are tightly connected to the min-sum algorithm. Moreover, replacing minima in the formula of the dual LP with soft-minima one obtains update rules that are tightly connected to the sum-product algorithm. This shows that LP solvers with complexity similar to the min-sum algorithm and the sum-product algorithm are feasible. Finally, we also discuss some sub-gradient-based methods.
Photonuclear sum rules and the tetrahedral configuration of $^4$He
Creators: name: Gazit, Doron
name: Barnea, Nir
name: Bacca, Sonia
name: Leidemann, Winfried
name: Orlandini, Giuseppina
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Three well known photonuclear sum rules (SR), i.e. the Thomas-Reiche-Kuhn, the bremsstrahlungs and the polarizability SR are calculated for 4He with the realistic nucleon-nucleon potential Argonne V18 and the three-nucleon force Urbana IX. The relation between these sum rules and the corresponding energy weighted integrals of the cross section is discussed. Two additional equivalences for the bremsstrahlungs SR are given, which connect it to the proton-neutron and neutron-neutron distances. Using them, together with our result for the bremsstrahlungs SR, we find a deviation from the tetrahedral symmetry of the spatial configuration of 4He. The possibility to access this deviation experimentally is discussed.
description: 13 pages, 1 table
Modelling the Gamma-Ray Morphology of HESS J1804-216 from Two Supernova Remnants in a Hadronic Scenario
Creators: name: Feijen, K.
name: Einecke, S.
name: Rowell, G.
name: Braiding, C.
name: Burton, M. G.
name: Wong, G. F.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: HESS J1804-216 is one of the brightest yet most mysterious TeV gamma-ray sources discovered to date. Previous arc-minute scale studies of the interstellar medium (ISM) surrounding this TeV gamma-ray source revealed HESS J1804-216 is likely powered by a mature supernova remnant (SNR) or pulsar, hence its origin remains uncertain. In this paper, we focus on the diffusive escape of cosmic-ray protons from potential SNR accelerators. These cosmic rays interact with the ISM to produce TeV gamma-rays. We utilise the isotropic diffusion equation solution for particles escaping from a shell, to model the energy-dependent escape and propagation of protons into the ISM. This work is the first attempt at modelling the spatial morphology of gamma-rays towards HESS J1804-216, using arc-minute ISM observations from both Mopra and the Southern Galactic Plane Survey. The spectral and spatial distributions of gamma-rays for the two nearby potential SNR counterparts, SNR G8.7-0.1 and the progenitor SNR of PSR J1803-2137, are presented here. We vary the diffusion parameters and particle spectrum and use a grid search approach to find the best combination of model parameters. We conclude that moderately slow diffusion is required for both candidates. The most promising candidate to be powering the TeV gamma-rays from HESS J1804-216 in a hadronic scenario is the progenitor SNR of PSR J1803-213.
description: 13 pages, 13 figures, 4 tables