cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Compressive Shift Retrieval
Creators: name: Ohlsson, Henrik
name: Eldar, Yonina C.
name: Yang, Allen Y.
name: Sastry, S. Shankar
Publisher: name: arXiv
Year: 2013
Subjects: subject: Systems and Control (eess.SY)
subject: Information Theory (cs.IT)
subject: Machine Learning (stat.ML)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: The classical shift retrieval problem considers two signals in vector form that are related by a shift. The problem is of great importance in many applications and is typically solved by maximizing the cross-correlation between the two signals. Inspired by compressive sensing, in this paper, we seek to estimate the shift directly from compressed signals. We show that under certain conditions, the shift can be recovered using fewer samples and less computation compared to the classical setup. Of particular interest is shift estimation from Fourier coefficients. We show that under rather mild conditions only one Fourier coefficient suffices to recover the true shift.
description: Submitted to IEEE Transactions on Signal Processing. Accepted to the 38th International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Vancouver, Canada, May 2013
Building Data Literacy Suite in the Humanities: A Hands-on Approach
Creators: name: Jiebei Luo
Publisher: name: Zenodo
Year: 2021

description: Research and scholarship across different disciplines are rapidly evolving with the advent of big data and advanced analytical and visualization tools. Besides those data-intensive disciplines in science and social science, more and more researchers in the humanities are adopting data-oriented methodologies. Understandably, scholars in the humanities have also raised their expectations on their students' data literacy and processing skills. This project builds upon the Information Wanted, an online historical database collected by Ruth-Ann Harris at Boston College's History Department, which provides a comprehensive archive of historical advertisements between 1831 and 1920 from the Piolet, a Boston-based newspaper. These advertisements were posted by early Irish immigrants (and others) looking for their lost friends and relatives. Given that these advertisements also contain information regarding the subjects' occupations, origins, and departure/arrival ports, this dataset offers a unique social and economic snapshot of the early Irish immigrants. Revolving around the ACRL information literacy standards, our plan is to utilize this unique dataset as a platform to develop a data literary suite that incorporates hands-on data skill learning for advanced undergraduate and entry-level graduate students across various majors in the humanities. Specifically, the project seeks to help students achieve the following objectives: 1. Identify the nature and extent of information needs, e.g., identify the archive data appropriate for the research topics; 2. Access data efficiently, e.g., consult disciplinary and interdisciplinary databases with an understanding of the data formats and the involved data extraction skills; 3. Evaluate data critically, e.g., develop knowledge of evaluating the quality and relevance of the collected data; 4. Prepare data for further statistical analysis, e.g., develop data processing skills in text recognition, spreadsheets, and visualization tools; 5. Understand the legal, social and ethical issues of data usage, i.e., introduce students to knowledge and skills of managing, preserving and re-using textual data.
title: Σχεδιασμός και μελέτη ενός αλγορίθμου χρονοπρογραμματισμού για την παροχή εγγυήσεων ποιότητας υπηρεσίας σε ΙΕΕΕ 802.16 ασύρματα δίκτυα
Creators: name: Κεραμιδάς Δημήτριος
Publisher: name: Technical University of Crete
Year: 2011

description: Μη διαθέσιμο
Formation of Chiral Soliton Lattice
Creators: name: Higaki, Tetsutaro
name: Kamada, Kohei
name: Nishimura, Kentaro
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The Chiral Soliton Lattice (CSL) is a lattice structure composed of domain walls aligned in parallel at equal intervals, which is energetically stable in the presence of a background magnetic field and a finite (baryon) chemical potential due to the topological term originated from the chiral anomaly. We study its formation from the vacuum state, with describing the CSL as a layer of domain-wall disks surrounded by the vortex or string loop, based on the Nambu-Goto-type effective theory. We show that the domain wall nucleates via quantum tunneling when the magnetic field is strong enough. We evaluate its nucleation rate and determine the critical magnetic field strength with which the nucleation rate is no longer exponentially suppressed. We apply this analysis to the neutral pion in the two-flavor QCD as well as the axion-like particles (ALPs) with a finite (baryon) chemical potential under an external magnetic field. In the former case, even though the CSL state is more energetically stable than the vacuum state and the nucleation rate becomes larger for sufficiently strong magnetic field, it cannot be large enough so that the nucleation of the domain walls is not exponentially suppressed and promoted, without suffering from the tachyonic instability of the charged pion fluctuations. In the latter case, we confirm that the effective interaction of the ALPs generically includes the topological term required for the CSL state to be energetically favored. We show that the ALP CSL formation is promoted if the magnetic field strength and the chemical potential of the system is slightly larger than the scale of the axion decay constant.
description: 21 pages, 5 figures
SU(2) gauge theory of the pseudogap phase in the two-dimensional Hubbard model
Creators: name: Bonetti, Pietro M.
name: Metzner, Walter
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We present a SU(2) gauge theory of fluctuating magnetic order in the two-dimensional Hubbard model. The theory is based on a fractionalization of electrons in fermionic chargons and bosonic spinons. The chargons undergo Néel or spiral magnetic order below a density dependent transition temperature $T^*$. Fluctuations of the spin orientation are described by a non-linear sigma model obtained from a gradient expansion of the spinon action. The spin stiffnesses are computed from a renormalization group improved random phase approximation. Our approximations are applicable for a weak or moderate Hubbard interaction. The spinon fluctuations prevent magnetic long-range order of the electrons at any finite temperature. The phase with magnetic chargon order exhibits many features characterizing the pseudogap regime in high-$T_c$ cuprates: a strong reduction of charge carrier density, a spin gap, Fermi arcs, and electronic nematicity.
description: 17 pages, 7 figures
The Inadequate Use of Confirmatory Factor Analysis in Second Language Acquisition Validation Studies
Creators: name: Vafaee, Payman
name: Kachinske, Ilina
Publisher: name: Columbia University
Year: 2019
Subjects: subject: Linguistics
subject: FOS: Languages and literature
subject: Confirmatory factor analysis
subject: Second language acquisition--Research
subject: Grammaticality (Linguistics)
subject: Linguistic models--Data processing
subject: Knowledge, Theory of

description: The current study aims to demonstrate how the lack of a conceptual framework and the inadequate use of confirmatory factor analysis (CFA) in second language (L2) acquisition validation studies can lead to misconceptions about the nature of data collected via different measurement instruments. To this end, we reanalyzed data from three factor-analytic validation studies on several measures of L2 explicit (EXK) and implicit (IMK) knowledge and demonstrated how an inadequate implementation of CFA in these studies has led to unwarranted validity claims. Following several criteria (e.g., presence or absence of time pressure, or drawing of attention to form or meaning), Ellis and Loewen (2007), Bowles (2011), and Zhang (2015) created test batteries that included different types of tests hypothesized to be distinct measures of EXK or IMK. Our re-analysis included the original CFA models retained in these studies, together with new theoretically and empirically plausible alternative models. Results demonstrated that the conclusions reached in the original studies were compromised by the existence of alternative or even equivalent CFA models that fit the date, and the measures included in these batteries were not actually distinct measures of EXK and IMK.
Topological Mirror Superconductivity
Creators: name: Zhang, Fan
name: Kane, C. L.
name: Mele, E. J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We demonstrate the existence of topological superconductors (SC) protected by mirror and time reversal (TR) symmetries. D-dimensional (D=1,2,3) crystalline SCs are characterized by 2^(D-1) independent integer topological invariants, which take the form of mirror Berry phases. These invariants determine the distribution of Majorana modes on a mirror symmetric boundary. The parity of total mirror Berry phase is the Z_2 index of a class DIII SC, implying that a DIII topological SC with a mirror line must also be a topological mirror SC but not vice versa, and that a DIII SC with a mirror plane is always TR trivial but can be mirror topological. We introduce representative models and suggest experimental signatures in feasible systems. Advances in quantum computing, the case for nodal SCs, the case for class D, and topological SCs protected by rotational symmetries are pointed out.
description: 5 pages, 2 figures, 1 table, published version
title: Ενεργοποίηση υπολειμματικών περιοχών. Η επανένταξη της περιοχής του πρώην εργοστασίου ΑΒΕΑ στον ιστό της πόλης των Χανίων
Creators: name: Χόρμπα Κανέλλα
Publisher: name: Technical University of Crete
Year: 2013

description: Μη διαθέσιμο
The Marčenko-Pastur law for sparse random bipartite biregular graphs
Creators: name: Dumitriu, Ioana
name: Johnson, Tobias
Publisher: name: arXiv
Year: 2013
Subjects: subject: Probability (math.PR)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 60B20 (Primary), 05C80 (Secondary)

description: We prove that the empirical spectral distribution of a (d_L, d_R)-biregular, bipartite random graph, under certain conditions, converges to a symmetrization of the Marčenko-Pastur distribution of random matrix theory. This convergence is not only global (on fixed-length intervals) but also local (on intervals of increasingly smaller length). Our method parallels the one used previously by Dumitriu and Pal (2012).
description: 29 pages; minor changes in response to referees' comments
title: Αειφόρο σχολικό συγκρότημα πρωτοβάθμιας εκπαίδευσης και κοινοτική βιβλιοθήκη στη Πεντέλη
Creators: name: Κουλοκτσή Ανναλία
Publisher: name: Technical University of Crete
Year: 2013

description: Μη διαθέσιμο
Not always invisible: finding the data about marginalized and underrepresented populations in Canada
Creators: name: Manuel, Kevin
name: Buhler, Jeremy
Publisher: name: Zenodo
Year: 2021

description: A sustainable data culture is also an inclusive data culture where planning, policy making, and research accounts for marginalized or underrepresented populations. Indigenous Peoples, racialized groups, and people who identify as LGBTQ+ are often underrepresented or hidden in the datasets we rely on for research and planning. Data about mental health, substance abuse, and homelessness can likewise be difficult to find, particularly for marginalized populations. To move toward a more sustainable and inclusive data culture we need to understand the historical and social context for this lack of visibility and the impact it can have in the present. It is also important to share this understanding with researchers, making them aware of potential gaps in the data, the reasons for those gaps, and alternative sources of information about marginalized groups or topics. This presentation explores the relative invisibility of several populations in the Canadian data context. We identify specific issues that contribute to these gaps including historical decisions about the Census; relationships between Indigenous Peoples and colonizing cultures; mainstream perceptions that sideline some subjects; and barriers to collecting data about certain groups or topics. The presenters draw on examples primarily from the Canadian context with occasional comparison to other international jurisdictions. In Fall 2019 and Winter 2020, two data librarians at different universities in Canada collaborated on a series of data literacy workshops about how to find data on marginalized or underrepresented populations. They will also report back on the experience of teaching these topics with their university communities and share the outcome and opportunities for providing instruction with more inclusive data sources.
title: Rec cover η αρχιτεκτονική επιφάνεια ως μέσο δημιουργίας χώρων συνάντησης
Creators: name: Γρηγοριάδου Εύα
name: Μανουσογιαννάκη Γεωργία
Publisher: name: Technical University of Crete
Year: 2013

description: Μη διαθέσιμο
Paolo Poccetti/Diego Poli/Carlo Santini (Hgg.), Eine Geschichte der lateinischen Sprache. Ausformung, Sprachgebrauch, Kommunikation
Creators: name: Schmitz, Dietmar
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Paolo Poccetti/Diego Poli/Carlo Santini (Hgg.), Eine Geschichte der lateinischen Sprache. Ausformung, Sprachgebrauch, Kommunikation. Aus dem Ital. Übersetzt von Hansbert Bertsch. Tübingen und Basel: A. Francke Verlag 2005. (ISBN 3-7720-8119-3)
description: Forum Classicum, Nr. 2 (2007): Forum Classicum
Street and activity centre characteristics associated with the use of different transport modes
Creators: name: De Gruyter, Chris
name: Truong, Long
name: Zahraee, Seyed Mojib
name: Young, William
Publisher: name: La Trobe
Year: 2023
Subjects: classificationCode: 330409
subject: Transport planning
classificationCode: 4407
subject: Policy and administration
classificationCode: 3304
subject: Urban and regional planning
classificationCode: 4406
subject: Human geography

description: Streets play a vital role in cities, yet there is little understanding of how their characteristics influence the use of different transport modes, particularly in activity centres. Using measurements of people concentration (people/km) from 57 activity centre locations across Melbourne, Australia, this research significantly contributes to understanding how street and activity centre characteristics are associated with the use of each of the following: walking, cycling, buses, trams, cars, car parking, trucks and motorbikes. Fractional logit regression models including the estimation of marginal effects were developed. Street-related characteristics that were significant included: presence of bicycle lanes, exclusive general traffic lanes, clearways, car parking charges, public transport services, in addition to footpath width, public transport service frequency, and movement and place classifications. Activity centre-related characteristics found to be significant included: size of the activity centre, network distance to various facilities and the CBD, intersection density, employment density and car ownership. The findings from this research can be used to support activity centre planning to achieve broader transport and land use objectives, particularly those related to local living such as 20-minute neighbourhoods.
The SM extension with color-octet scalars: diphoton enhancement and global fit of LHC Higgs data
Creators: name: Cao, Junjie
name: Wan, Peihua
name: Yang, Jin Min
name: Zhu, Jingya
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: In light of the significant progress of the LHC to determine the properties of the Higgs boson, we investigate the capability of the Manohar-Wise model in explaining the Higgs data. This model extends the SM by one family of color-octet and isospin-doublet scalars, and it can sizably alter the coupling strengths of the Higgs boson with gluons and photons. We first examine the current constraints on the model, which are from unitarity, the LHC searches for the scalars and the electroweak precision data (EWPD).In implementing the unitarity constraint, we use the properties of the SU(3) group to simplify the calculation. Then in the allowed parameter space we perform a fit of the model, using the latest ATLAS and CMS data, respectively. We find that the Manohar-Wise model is able to explain the data with χ^2 significantly smaller than the SM value. We also find that the current Higgs data, especially the ATLAS data, are very powerful in further constraining the parameter space of the model. In particular, in order to explain the diphoton enhancement reported by the ATLAS collaboration, the sign of the hgg coupling is usually opposite to that in the SM.
description: Version in JHEP (references added, analysis updated with Higgs data after Moriond 2013)
Testing the Limits of AGN Feedback and the Onset of Thermal Instability in the Most Rapidly Star Forming Brightest Cluster Galaxies
Creators: name: Calzadilla, Michael S.
name: McDonald, Michael
name: Donahue, Megan
name: McNamara, Brian R.
name: Fogarty, Kevin
name: Gaspari, Massimo
name: Gitti, Myriam
name: Russell, Helen R.
name: Tremblay, Grant R.
name: Voit, G. Mark
name: Ubertosi, Francesco
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present new, deep, narrow- and broad-band Hubble Space Telescope observations of seven of the most star-forming brightest cluster galaxies (BCGs). Continuum-subtracted [O II] maps reveal the detailed, complex structure of warm ($T \sim 10^4$ K) ionized gas filaments in these BCGs, allowing us to measure spatially-resolved star formation rates (SFRs) of ~60-600 Msun/yr. We compare the SFRs in these systems and others from the literature to their intracluster medium (ICM) cooling rates (dM/dt), measured from archival Chandra X-ray data, finding a best-fit relation of log(SFR) = (1.67+/-0.17) log(dM/dt) + (-3.25+/-0.38) with an intrinsic scatter of 0.39+/-0.09 dex. This steeper-than-unity slope implies an increasingly efficient conversion of hot ($T \sim 10^7$ K) gas into young stars with increasing dM/dt, or conversely a gradual decrease in the effectiveness of AGN feedback in the strongest cool cores. We also seek to understand the physical extent of these multiphase filaments that we observe in cluster cores. We show, for the first time, that the average extent of the multiphase gas is always smaller than the radii at which the cooling time reaches 1 Gyr, the tcool/tff profile flattens, and that X-ray cavities are observed. This implies a close connection between the multiphase filaments, the thermodynamics of the cooling core, and the dynamics of X-ray bubbles. Interestingly, we find a one-to-one correlation between the average extent of cool multiphase filaments and the radius at which the cooling time reaches 0.5 Gyr, which may be indicative of a universal condensation timescale in cluster cores.
description: 26 pages, 5 figures, 5 tables. Submitted to ApJ
Timo Hoyer: Tugend und Erziehung. Die Grundlegung der Moralpädagogik in der Antike
Creators: name: Schmitz, Dietmar
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Timo Hoyer: Tugend und Erziehung. Die Grundlegung der Moralpädagogik in der Antike, Bad Heilbrunn: Verlag Julius Klinkhardt 2005, 280 Seiten, (ISBN3-7815-1418-8)
description: Forum Classicum, Nr. 2 (2007): Forum Classicum
Nonabelian higher derived brackets
Creators: name: Bandiera, Ruggero
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Algebra (math.QA)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: Let M be a graded Lie algebra, together with graded Lie subalgebras L and A such that as a graded space M is the direct sum of L and A, and A is abelian. Let D be a degree one derivation of M squaring to zero and sending L into itself, then Voronov's construction of higher derived brackets associates to D a L-infinity structure on A[-1]. It is known, and it follows from the results of this paper, that the resulting L-infinity algebra is a weak model for the homotopy fiber of the inclusion of differential graded Lie algebras i : (L,D,[, ]) -> (M,D,[, ]). We prove this fact using homotopical transfer of L-infinity structures, in this way we also extend Voronov's construction when the assumption A abelian is dropped: the resulting formulas involve Bernoulli numbers. In the last section we consider some example and some further application.
description: v3: several changes in the exposition
Topological synthesis of fluidic pressure-actuated robust compliant mechanisms
Creators: name: Kumar, Prabhat
name: Langelaar, Matthijs
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Computer and information sciences

description: This paper presents a robust density-based topology optimization approach for synthesizing pressure-actuated compliant mechanisms. To ensure functionality under manufacturing inaccuracies, the robust or three-field formulation is employed, involving dilated, intermediate and eroded realizations of the design. Darcy's law in conjunction with a conceptualized drainage term is used to model the pressure load as a function of the design vector. The consistent nodal loads are evaluated from the obtained pressure field using the standard finite element method. The objective and load sensitivities are obtained using the adjoint-variable approach. A multi-criteria objective involving both the stiffness and flexibility of the mechanism is employed in the robust formulation, and min-max optimization problems are solved to obtain pressure-actuated inverter, gripper, and contractor compliant mechanisms with different minimum feature sizes. Limitations of the linear elasticity assumptions while designing mechanisms are identified with high pressure loads. Challenges involved in designing finite deformable pressure-actuated compliant mechanisms are presented.
description: 24 Figures
Columbia University Division of Nephrology Continuous Renal Replacement Therapy Pairing Tool & Dashboard
Creators: name: Stevens, Jacob S.
name: Toma, Katherine
Publisher: name: Columbia University
Year: 2020
Subjects: Medicine
Clinical medicine--Data processing
Nephrology

description: This workbook is designed to assist nephrology providers efficiently pair patients on continuous renal replacement therapy (CRRT) on alternating days and to facilitate the movement of machines between patients across different intensive care units (ICU). For patients requiring CRRT, providers confirm their current status (on or off CRRT) and whether each patient needs to continue on their current schedule or modify the schedule. Given the alternating day CRRT schedule, each day is automatically designated as either A or B and patients sharing machines are balanced between the 2 days. Machines are assigned a numerical code which is linked to their radio-frequency ID to track their movement and location throughout the hospital. Each patient is assigned a potential pairing and machine number which allows the tool to identify whether each patient is unpaired, paired, or inappropriately allocated. The number of patients requiring CRRT for that specific day is totaled and then subtotaled by ICU location. This pairing information feeds into the CRRT Sharing Protocol Dashboard which displays the names, ICU location, room number, and machine number of the 2 patients in a pair and guides coordinators in charge of physically moving the machine from one patient to the next after the RRT huddle. It also allows for pairing of patients based on geography and to make more efficient pairs. Such a system allows for hour-by-hour changes to be centralized and tracked and facilitates resource allocation.
Duden. Das große Fremdwörterbuch / Deutsches Universalwörterbuch
Creators: name: Werner, Jürgen
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Duden. Das große Fremdwörterbuch. 4., aktualis. Aufl. Dudenverlag. Mannheim usw. 2007.1548 S. Mit CD-ROM (ISBN-13: 978-3-411- 04164-0).
Deutsches Universalwörterbuch. 6., überarb. u. erweit. Aufl. Dudenverlag. Mannheim usw. 2006. 2016 S, (ISBN-10: 3-411-05506-5).
description: Forum Classicum, Nr. 3 (2007): Forum Classicum
Non-commutative localizations of additive categories and weight structures; applications to birational motives
Creators: name: Bondarko, Mikhail V.
name: Sosnilo, Vladimir A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: K-Theory and Homology (math.KT)
subject: Algebraic Geometry (math.AG)
subject: Category Theory (math.CT)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: Primary: 18E35, 16S85, 14C15, Secondary: 18E30, 18E05, 14F42, 19E15, 16U20, 18G35, 16E20

description: In this paper we demonstrate that 'non-commutative localizations' of arbitrary additive categories (generalizing those defined by Cohn for rings) are closely (and naturally) related with weight structures. Localizing an arbitrary triangulated $C$ by a set $S$ of morphisms in the heart of a weight structure $w$ for it one obtains a triangulated category endowed with a weight structure $w'$. The heart of $w'$ is a certain idempotent completion of the non-commutative localization of the heart of $w$ by $S$. The latter is the natural categorical version of Cohn's localizations of rings i.e. the functor connecting hearts is universal among all the additive functors that make the elements of $S$ invertible. In particular, taking $C=K^b(A)$ for an additive $A$ we obtain a very efficient tool for computing the additive localization of $A$ by $S$; using it, we generalize the calculations of Gerasimov and Malcolmson. We apply our results to certain categories of birational motives over a base scheme $U$ (generalizing those defined by Kahn and Sujatha). When $U$ is the spectrum of a perfect field, the weight structure obtained is compatible with the Chow and Gersten weight structures defined by the first author in previous papers. For a general $U$ the result is completely new. We also consider the relation of weight structures with their adjacent t-structures (in localizations). In the 'motivic' setting mentioned this yields the natural generalization of the 'duality' between birational motives and birational sheaves with transfers established by Kahn and Sujatha.
description: Several minor corrections made
Quantum asymmetry and noisy multi-mode interferometry
Creators: name: Albarelli, Francesco
name: Mazelanik, Mateusz
name: Lipka, Michał
name: Streltsov, Alexander
name: Parniak, Michał
name: Demkowicz-Dobrzanski, Rafal
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum asymmetry is a physical resource which coincides with the amount of coherence between the eigenspaces of a generator responsible for phase encoding in interferometric experiments. We highlight an apparently counter-intuitive behavior that the asymmetry may \emph{increase} as a result of a \emph{decrease} of coherence inside a degenerate subspace. We intuitively explain and illustrate the phenomena by performing a three-mode single-photon interferometric experiment, where one arm carries the signal and two noisy reference arms have fluctuating phases. We show that the source of the observed sensitivity improvement is the reduction of correlations between these fluctuations and comment on the impact of the effect when moving from the single-photon quantum level to the classical regime. Finally, we also establish the analogy of the effect in the case of entanglement resource theory.
description: v1: 6+4 pages, 3+5 figures, comments welcome! v2: 6+6 pages, 3+7 figures, streamlined presentation, expanded supplemental material, close to published version
title: Ανάπλαση παλιού οινοποιείου C.A.I.R. στη Ρόδο. Ένα αστικό αγρόκτημα
Creators: name: Βλαχάκη Κατερίνα
name: Καπερώνη Υακίνθη
Publisher: name: Technical University of Crete
Year: 2013

description: Μη διαθέσιμο
Rapid cooling of the compact star in Cassiopea A as a phase transition in dense QCD
Creators: name: Sedrakian, Armen
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We present a model of the compact star in Cassiopea A that accounts for its unusually fast cooling behavior. This feature is interpreted as an enhancement in the neutrino emission triggered by a transition from a fully gapped, two-flavor, color-superconducting phase to a crystalline phase or an alternative gapless, color-superconducting phase. By fine-tuning a single parameter -- the temperature of this transition -- a specific cooling scenario can be selected that fits the Cas A data. Such a scenario requires a massive $M\sim 2M_{\odot}$ star and is, therefore, distinctive from models invoking canonical 1.4 $M_{\odot}$ mass star with nucleonic pairing alone.
description: 5 pages, 3 figures, v2 and v3: minor changes, matches the version publised in A & A Letters
Stellar Loci VI: An Updated Catalog of the Best and Brightest Metal-poor Stars
Creators: name: Xu, Shuai
name: Yuan, Haibo
name: Zhang, Ruoyi
name: Li, Haining
name: Beers, Timothy C.
name: Huang, Yang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We employ Gaia, 2MASS, and ALLWISE photometry, as well as astrometric data from Gaia, to search for relatively bright very metal-poor ([Fe/H] $< -2.0$; VMP) giant star candidates using three different criteria: 1) our derived Gaia photometric metallicities, 2) the lack of stellar molecular absorption near 4.6 microns, and 3) their high tangential velocities. With different combinations of these criteria, we have identified six samples of candidates with $G <$ 15: the Gold sample (24,304 candidates), the Silver GW sample (40,157 candidates), the Silver GK sample (120,452 candidates), the Bronze G sample (291,690 candidates), the Bronze WK sample (68,526 candidates), and the Low $b$ sample (4,645 candidates). The Low $b$ sample applies to sources with low Galactic latitude, $|b| < 10^\circ$, while the others are for sources with $|b| > 10^\circ$. By cross-matching with results derived from medium-resolution ($R \sim$ 1800) from LAMOST DR8, we establish that the success rate for identifying VMP stars is 60.1$\%$ for the Gold sample, 39.2$\%$ for the Silver GW sample, 41.3$\%$ for the Silver GK sample, 15.4$\%$ for the Bronze G sample, 31.7$\%$ for the Bronze WK sample, and 16.6$\%$ for the Low $b$ sample, respectively. An additional strict cut on the quality parameter $RUWE < 1.1$ can further increase the success rate of the Silver GW, Silver GK, and Bronze G samples to 46.9$\%$, 51.6$\%$, and 29.3$\%$, respectively. Our samples provide valuable targets for high-resolution follow-up spectroscopic observations, and are made publicly available.
description: 15 pages, 9 figures, 4 tables, accepted for publication in ApJS, data is available at https://doi.org/10.12149/101160
Particle-resolved simulations of four-way coupled, polydispersed, particle-laden flows
Creators: name: Yao, Yinuo
name: Biegert, Edward
name: Vowinckel, Bernhard
name: Köllner, Thomas
name: Meiburg, Eckart
name: Balachandar, S.
name: Criddle, Craig S.
name: Fringer, Oliver B.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We present a collocated-grid framework for Direct Numerical Simulations of polydisperse particles submerged in a viscous fluid. The fluid-particle forces are coupled with the Immersed Boundary Method (IBM) while the particle-particle forces are modeled with a combination of contact and lubrication models, adapted for collocated grids. Our method is modified from the staggered-grid IBM of previous authors to a collocated-grid IBM by adapting the fluid and particle solvers. The method scales well on high-performance parallel computing platforms. It has been validated against various cases and is able to reproduce experimental results. Tuning parameters have been thoroughly calibrated to ensure the accuracy of the method. Finally, we demonstrate the capability of the method to simulate both monodispersed and bidispersed fluidized beds and reproduce the power law relationship between the inflow velocity and the porosity.
description: 32 pages, 17 figures
Cross-Campus Dialysis Resource Tracking Dashboard
Creators: name: Stevens, Jacob S.
Publisher: name: Columbia University
Year: 2020
Subjects: Medicine
Clinical medicine--Data processing
Hemodialysis
Hemodialysis--Equipment and supplies

description: We developed a data-driven approach to analyze and guide our response to the COVID-19 surge using web-based spreadsheets to track continuous renal replacement therapy (CRRT) and hemodialysis (HD) censuses and dialysis supplies. Each site enters the details of their own CRRT and HD programs, which then automatically populated the Enterprise-wide RRT Dashboards. The CRRT dashboard also includes the current count of cartridges and bags of therapy fluid available at each site and at the central warehouse. The projected number of days of supply remaining for each site and for the entire enterprise based on the size of the CRRT census was automatically calculated and color-coded. The dashboard allowed for identification of hospitals that were disproportionally affected, and aided in enterprise-level decisions to shift resources between hospitals or from central storage. Similarly, the HD dashboard allowed for quick, visual reporting of the status of working machines, census sizes, nurses, and HD technicians at each site. Both tools were critical in decision-making that occurred nightly on the cross-campus conference calls, and allowed for the equitable sharing of resources across a large, complex healthcare system.
Existence, uniqueness, and convergence rates for gradient flows in the training of artificial neural networks with ReLU activation
Creators: name: Eberle, Simon
name: Jentzen, Arnulf
name: Riekert, Adrian
name: Weiss, Georg S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Numerical Analysis (math.NA)
subject: Dynamical Systems (math.DS)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: The training of artificial neural networks (ANNs) with rectified linear unit (ReLU) activation via gradient descent (GD) type optimization schemes is nowadays a common industrially relevant procedure. Till this day in the scientific literature there is in general no mathematical convergence analysis which explains the numerical success of GD type optimization schemes in the training of ANNs with ReLU activation. GD type optimization schemes can be regarded as temporal discretization methods for the gradient flow (GF) differential equations associated to the considered optimization problem and, in view of this, it seems to be a natural direction of research to first aim to develop a mathematical convergence theory for time-continuous GF differential equations and, thereafter, to aim to extend such a time-continuous convergence theory to implementable time-discrete GD type optimization methods. In this article we establish two basic results for GF differential equations in the training of fully-connected feedforward ANNs with one hidden layer and ReLU activation. In the first main result of this article we establish in the training of such ANNs under the assumption that the probability distribution of the input data of the considered supervised learning problem is absolutely continuous with a bounded density function that every GF differential equation admits for every initial value a solution which is also unique among a suitable class of solutions. In the second main result of this article we prove in the training of such ANNs under the assumption that the target function and the density function of the probability distribution of the input data are piecewise polynomial that every non-divergent GF trajectory converges with an appropriate rate of convergence to a critical point and that the risk of the non-divergent GF trajectory converges with rate 1 to the risk of the critical point.
description: 30 pages. arXiv admin note: text overlap with arXiv:2107.04479, arXiv:2108.04620
Jens Halfwassen, Plotin und der Neuplatonismus
Creators: name: Chwalek, Burkard
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Jens Halfwassen, Plotin und der Neuplatonismus. München (C.H. Beck) 2004, 199 S. (ISBN 3 406 511171)
description: Forum Classicum, Nr. 4 (2007): Forum Classicum
Black hole entropy and long strings
Creators: name: Verlinde, Erik P.
name: Visser, Manus R.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We discuss whether black hole entropy counts short or long range microstates in quantum gravity. In brick wall and induced gravity models the entropy arises due to short distance correlations across the event horizon cut off at the Planck length. However, the energy of these short range degrees of freedom is too high compared to the black hole energy. We argue that the long string phenomenon, which naturally appears in matrix quantum mechanics, resolves this issue by lowering the excitation energy per degree of freedom. This mechanism also reduces the total number of microscopic degrees of freedom in a given volume, leading to a correct estimate of the Bekenstein-Hawking formula for black hole entropy.
description: 9 pages, Essay written for the Gravity Research Foundation 2022 Awards for Essays on Gravitation
Elisabeth Hermann-Otto: Konstantin der Große
Creators: name: Mause, Michael
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Elisabeth Hermann-Otto: Konstantin der Große, Darmstadt (Wissenschaftliche Buchgesellschaft) 2007, 264 Seiten, (ISBN 978-3-89678-601-2).
description: Forum Classicum, Nr. 4 (2007): Forum Classicum
Modeling phi-meson production in small collision systems observed by PHENIX
Creators: name: Mitrankova (Larionova), Mariia
Publisher: name: Zenodo
Year: 2021
Subjects: qchs21
phenix
small systems
p+al
p+au
d+au
3he+au
cu+au
u+u
kaon
pion
φ
raa
nuclear
modification
π0

description: Talk presented at the Quark Confinement and the Hadron Spectrum 2021 conference
Stoa und Stoiker. Griechisch-Lateinisch-Deutsch
Creators: name: Zimmermann, Herbert
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Stoa und Stoiker. Griechisch-Lateinisch-Deutsch. Hg. und übersetzt von Rainer Nickel. Artemis & Winkler 2008 (Sammlung Tusculum), 2 Bde. 2080 S., (ISBN-13: 978-3-538-03504-1)
description: Forum Classicum, Nr. 4 (2008): Forum Classicum
Continuous transition between Ising magnetic order and a chiral spin liquid
Creators: name: Shankar, G.
name: Lin, Chien-Hung
name: Maciejko, Joseph
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The competition between fractionalized spin-liquid states and magnetically ordered phases is an important paradigm in frustrated magnetism. Spin-orbit coupled Mott insulators with Ising-like magnetic anisotropies, such as Kitaev materials, are a particularly rich playground to explore this competition. In this work, we use effective field theory methods to show that a direct quantum phase transition can occur in two-dimensional (2D) Ising spin systems between a topologically ordered chiral spin liquid and a phase with magnetic long-range order. Such a transition can be protected by lattice symmetries and is described by a theory of massless Majorana fields coupled to non-Abelian $SO(N)$ gauge fields with a Chern-Simons term. We further show that Euclidean Majorana zero modes bound to $\mathbb{Z}_2$ monopole-instantons in the emergent non-Abelian gauge field are key to understanding spontaneous symmetry breaking in the ordered phase.
description: 12 pages (main text) + 12 pages (appendices). v3: fixed typos + published version
Filtering and imaging of frequency-degenerate spin waves using nanopositioning of a single-spin sensor
Creators: name: Simon, Brecht G.
name: Kurdi, Samer
name: Carmiggelt, Joris J.
name: Borst, Michael
name: Katan, Allard
name: van der Sar, Toeno
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Nitrogen-vacancy (NV) magnetometry is a new technique for imaging spin waves in magnetic materials. It detects spin waves by their microwave magnetic stray fields, which decay evanescently on the scale of the spin-wavelength. Here, we use nanoscale control of a single-NV sensor as a wavelength filter to characterize frequency-degenerate spin waves excited by a microstrip in a thin-film magnetic insulator. With the NV-probe in contact with the magnet, we observe an incoherent mixture of thermal and microwave-driven spin waves. By retracting the tip, we progressively suppress the small-wavelength modes until a single coherent mode emerges from the mixture. In-contact scans at low drive power surprisingly show occupation of the entire iso-frequency contour of the two-dimensional spin-wave dispersion despite our one-dimensional microstrip geometry. Our distance-tunable filter sheds light on the spin-wave band occupation under microwave excitation and opens opportunities for imaging magnon condensates and other coherent spin-wave modes.
Monte Carlo Simulation of the Photon-Tagger Focal-Plane Electronics at the MAX IV Laboratory
Creators: name: Myers, L. S.
name: Feldman, G.
name: Fissum, K. G.
name: Isaksson, L.
name: Kovash, M. A.
name: Nathan, A. M.
name: Pywell, R. E.
name: Schröder, B.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Rate-dependent effects in the electronics used to instrument the tagger focal plane at the MAX IV Laboratory have been investigated using the novel approach of Monte Carlo simulation. Results are compared to analytical calculations as well as experimental data for both specialized testing and production running to demonstrate a thorough understanding of the behavior of the detector system.
description: 31 pages, 17 figures, modified after submission to Nuclear Instruments and Methods in Physics Research Section A
Columbia University Division of Nephrology Census Tracking Dashboard
Creators: name: Stevens, Jacob S.
Publisher: name: Columbia University
Year: 2020
Subjects: Medicine
Clinical medicine--Data processing
COVID-19 (Disease)

description: This workbook is designed to track the inpatient nephrology service census at our institution in response to the COVID-19 pandemic surge. The individual worksheet tabs described below allow services to input census counts at the end of each day ("Census Entry") which automatically gets stored in the "Archive" tab (not to be used for data entry) which feeds into the "Main Dashboard" tab. Users can track growth by changing the date at the top of the "Main Dashboard" tab which summarizes overall census and COVID-19 census growth and broken down by the CRRT and HD censuses.
title: Απόκριση ζήτησης στο κτίριο Arca
title: Demand response in the building Arca
Creators: name: Μητροσυλης Ιωαννης
Publisher: name: Technical University of Crete
Year: 2019

description: Στην παρούσα εργασία εφαρμόστηκε η απόκριση ζήτησης στο κτίριο Arca. Πιο συγκεκριμένα έγινε προσομοίωση του συστήματος της ενδοδαπέδιας ψύξης και του κέρδους σε θερμική ενέργεια του γραμμικού ανακλαστήρα Fresnel. Κατόπιν σε συνδυασμό με την παραγωγή θερμικής ενέργειας του γραμμικού ανακλαστήρα υλοποιήθηκαν δύο σενάρια. Στο πρώτο τι κόστος σε ηλεκτρική ενέργεια έχει το HVAC σύστημα εάν δεν χρησιμοποιηθεί η αποθήκευση θερμικής ενέργειας και στο δεύτερο εάν χρησιμοποιηθεί. .

Τέλος εφαρμόστηκε η απόκριση ζήτησης πάνω σε ένα νέο τρόπο υπολογισμού του κόστους,ανά ώρα, της ηλεκτρικής ενέργειας.
A Dark-Disk Universe
Creators: name: Fan, JiJi
name: Katz, Andrey
name: Randall, Lisa
name: Reece, Matthew
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We point out that current constraints on dark matter imply only that the majority of dark matter is cold and collisionless. A subdominant fraction of dark matter could have much stronger interactions. In particular, it could interact in a manner that dissipates energy, thereby cooling into a rotationally-supported disk, much as baryons do. We call this proposed new dark matter component Double-Disk Dark Matter (DDDM). We argue that DDDM could constitute a fraction of all matter roughly as large as the fraction in baryons, and that it could be detected through its gravitational effects on the motion of stars in galaxies, for example. Furthermore, if DDDM can annihilate to gamma rays, it would give rise to an indirect detection signal distributed across the sky that differs dramatically from that predicted for ordinary dark matter. DDDM and more general partially interacting dark matter scenarios provide a large unexplored space of testable new physics ideas.
description: Concise companion to arXiv:1303.1521; v2: published in PRL, references added