cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Relative stability toward diffeomorphisms indicates performance in deep nets
Creators: name: Petrini, Leonardo
name: Favero, Alessandro
name: Geiger, Mario
name: Wyart, Matthieu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Understanding why deep nets can classify data in large dimensions remains a challenge. It has been proposed that they do so by becoming stable to diffeomorphisms, yet existing empirical measurements support that it is often not the case. We revisit this question by defining a maximum-entropy distribution on diffeomorphisms, that allows to study typical diffeomorphisms of a given norm. We confirm that stability toward diffeomorphisms does not strongly correlate to performance on benchmark data sets of images. By contrast, we find that the stability toward diffeomorphisms relative to that of generic transformations $R_f$ correlates remarkably with the test error $ε_t$. It is of order unity at initialization but decreases by several decades during training for state-of-the-art architectures. For CIFAR10 and 15 known architectures, we find $ε_t\approx 0.2\sqrt{R_f}$, suggesting that obtaining a small $R_f$ is important to achieve good performance. We study how $R_f$ depends on the size of the training set and compare it to a simple model of invariant learning.
description: NeurIPS 2021 Conference
Viewing Black Holes by Waves
Creators: name: Kanai, Ken-ichiro
name: Nambu, Yasusada
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We study scattering of waves by black holes. Solving a massless scalar field with a point source in the Schwarzschild spacetime, waves scattered by the black hole is obtained numerically. We then reconstruct images of the black hole from scattered wave data for specified scattering angles. For the forward and the backward directions, obtained wave optical images of black holes show rings that correspond to the black hole glories associated with existence of the unstable circular photon orbit in the Schwarzschild spacetime.
description: 24 pages, final version to appear in Class. Quantum Grav
Scalar Field Cosmology via Noether Symmetries in Energy-Momentum Squared Gravity
Creators: name: Sharif, M.
name: Gul, M. Zeeshan
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: This article examines the analytic solutions of isotropic spacetime with the minimal coupling of scalar field and matter in the context of energy-momentum squared gravity. The scalar field includes quintessence and phantom dark energy models. We evaluate solutions of a physical system through the Noether symmetry approach that provide some viable constraints to choose the cosmological models on the basis of current observations. We consider different models of this theory to establish Noether equations, symmetry generators and corresponding conserved quantities. We compute analytic solutions and examine their graphical representation for various cosmological quantities. The behavior of these quantities is found to be consistent with current observations implying that this theory shows expanding behavior of the universe. We find that symmetry generators and their conserved parameters exist in all cases.
description: 32 pages, 10 figures
Unsupervised Machine Learning of Quenched Gauge Symmetries: A Proof-of-Concept Demonstration
Creators: name: Lozano-Gómez, Daniel
name: Pereira, Darren
name: Gingras, Michel J. P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: In condensed matter physics, one of the goals of machine learning is the classification of phases of matter. The consideration of a system's symmetries can significantly assist the machine in this goal. We demonstrate the ability of an unsupervised machine learning protocol, the Principal Component Analysis method, to detect hidden quenched gauge symmetries introduced via the so-called Mattis gauge transformation. Our work reveals that unsupervised machine learning can identify hidden properties of a model and may therefore provide new insights into the models themselves.
description: 8 pages, 12 figures
Introducción a la teoría de complejidad topológica
Creators: name: Zapata, Cesar A. Ipanaque
name: Pérez, Rodolfo J. Gálvez
Publisher: name: arXiv
Year: 2021
Subjects: subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics

description: In this work we will review the notion of topological complexity, introduced by Michael Farber in 2003. We will use this theory of topological complexity to solve the motion planning problem of a mobile robot that navigates in the Euclidean plane avoiding colliding with an obstacle. Specifically, we calculate topological complexity and design explicit algorithms.
description: In spanish. Keywords: Topological complexity, Motion planning problem, Algoritms
Rapid quantitative pharmacodynamic imaging by a novel method: theory, simulation testing and proof of principle
Creators: name: Black, Kevin J.
name: Koller, Jonathan M.
name: Miller, Brad D.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences
subject: J.3

description: Pharmacological challenge imaging has mapped, but rarely quantified, the sensitivity of a biological system to a given drug. We describe a novel method called rapid quantitative pharmacodynamic imaging. This method combines pharmacokinetic-pharmacodynamic modeling, repeated small doses of a challenge drug over a short time scale, and functional imaging to rapidly provide quantitative estimates of drug sensitivity including EC50 (the concentration of drug that produces half the maximum possible effect). We first test the method with simulated data, assuming a typical sigmoidal dose-response curve and assuming imperfect imaging that includes artifactual baseline signal drift and random error. With these few assumptions, rapid quantitative pharmacodynamic imaging reliably estimates EC50 from the simulated data, except when noise overwhelms the drug effect or when the effect occurs only at high doses. In preliminary fMRI studies of primate brain using a dopamine agonist, the observed noise level is modest compared with observed drug effects, and a quantitative EC50 can be obtained from some regional time-signal curves. Taken together, these results suggest that research and clinical applications for rapid quantitative pharmacodynamic imaging are realistic.
description: 26 pages total, 4 tables, 10 figures. The original PDF file at https://peerj.com/articles/117/ includes active hyperlinks. This version is the final published version. (Differs from v2 only in that I corrected the abstract on the arXiv.org page.)
Eine Kölner Borte im Suermondt-Museum und ihr Gegenstück im Victoria and Albert-Museum in London
Creators: name: Feldbusch, Hans
Publisher: name: Aachener Kunstblätter
Year: 2017

description: -
description: Aachener Kunstblätter, Bd. 17-18 (1958-1959): Aachener Kunstblätter
title: Stressed but not Helpless: Strategic Behaviour of Banks Under Adverse Market Conditions
Creators: name: Halaj, Grzegorz
name: Priazhkina, Sofia
Publisher: name: Bank of Canada
Year: 2021

description: "Central banks and regulators around the world routinely assess the ability of banks to survive hypothetical stress scenarios by conducting bank stress tests. During a stress scenario—think of the financial crisis of 2008–09—we would expect banks to modify their risk exposure and react to actions their competitors take. However, standard stress-test tools do not capture bank behaviours even under extreme stress scenarios. Assumptions about bank behaviours may impact the analysis of bank resilience and regulation during a financial crisis.

Our new stress-testing tool challenges these assumptions. Banks under stress can strategically change their behaviour to maximize their value for shareholders. Using confidential Canadian supervisory data, we assess whether this value-maximizing behaviour can amplify a hypothetical stress scenario.

We show that during a crisis, banks comply with regulatory requirements by reducing their lending. This results in less financial support for businesses and consumers when they need it most. As such, a trade-off exists between banking stability and macroeconomic stability. "

description: "Les banques centrales et les autorités de réglementation partout dans le monde évaluent régulièrement la capacité des banques à survivre à des scénarios de crise hypothétiques en menant des simulations. Dans ce type de scénarios, qui peuvent ressembler à la crise financière de 2008-2009, on s’attend à ce que les banques modifient leur exposition aux risques et réagissent aux mesures prises par leurs concurrents. Cependant, les outils de simulation de crise standards ne font pas ressortir les comportements des banques, même dans des scénarios extrêmes. Les hypothèses relatives à ces comportements peuvent influer sur l’analyse de la résilience et de la réglementation des banques pendant une crise financière.

Notre nouvel outil de simulation de crise remet en question ces hypothèses. En effet, les banques qui subissent des tensions peuvent modifier stratégiquement leurs comportements afin de maximiser la valeur pour leurs actionnaires. Au moyen de données canadiennes confidentielles issues de la surveillance, nous examinons si ces comportements stratégiques peuvent amplifier un scénario de crise hypothétique.

 Nous montrons qu’en temps de crise, les banques se conforment aux exigences réglementaires en réduisant leurs activités de prêt. Résultat : les entreprises et les consommateurs reçoivent un moins grand soutien financier au moment où ils en ont le plus besoin. Il y a donc une relation d’arbitrage entre la stabilité bancaire et la stabilité économique."
Pythagoras numbers of orders in biquadratic fields
Creators: name: Krásenský, Jakub
name: Raška, Martin
name: Sgallová, Ester
Publisher: name: arXiv
Year: 2021
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11E25 (Primary), 11E12, 11R04, 11R80 (Secondary)

description: We examine the Pythagoras number $\mathcal{P}(\mathcal{O}_K)$ of the ring of integers $\mathcal{O}_K$ in a totally real biquadratic number field $K$. We show that the known upper bound $7$ is attained in a large and natural infinite family of such fields. In contrast, for almost all fields $\mathbb{Q}(\sqrt5, \sqrt{s})$ we prove $\mathcal{P}(\mathcal{O}_K)=5$. Further we show that $5$ is a lower bound for all but seven fields $K$ and $6$ is a lower bound in an asymptotic sense.
description: 44 pages. A minor correction: By mistake, we originally quoted another paper by M. Peters for the results on real quadratic fields
Die Apokalypse Ottos III. und das Perikopenbuch Heinrichs II. Bildtradition und imperiale Ideologie um das Jahr 1000
Creators: name: Klein, Peter K.
Publisher: name: Aachener Kunstblätter
Year: 2017

description: -
description: Aachener Kunstblätter, Bd. 56-57 (1988-1989): Aachener Kunstblätter
Multi-Label Meta Weighting for Long-Tailed Dynamic Scene Graph Generation
Creators: name: Chen, Shuo
name: Du, Yingjun
name: Mettes, Pascal
name: Snoek, Cees G. M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences
subject: I.2.10

description: This paper investigates the problem of scene graph generation in videos with the aim of capturing semantic relations between subjects and objects in the form of $\langle$subject, predicate, object$\rangle$ triplets. Recognizing the predicate between subject and object pairs is imbalanced and multi-label in nature, ranging from ubiquitous interactions such as spatial relationships (\eg \emph{in front of}) to rare interactions such as \emph{twisting}. In widely-used benchmarks such as Action Genome and VidOR, the imbalance ratio between the most and least frequent predicates reaches 3,218 and 3,408, respectively, surpassing even benchmarks specifically designed for long-tailed recognition. Due to the long-tailed distributions and label co-occurrences, recent state-of-the-art methods predominantly focus on the most frequently occurring predicate classes, ignoring those in the long tail. In this paper, we analyze the limitations of current approaches for scene graph generation in videos and identify a one-to-one correspondence between predicate frequency and recall performance. To make the step towards unbiased scene graph generation in videos, we introduce a multi-label meta-learning framework to deal with the biased predicate distribution. Our meta-learning framework learns a meta-weight network for each training sample over all possible label losses. We evaluate our approach on the Action Genome and VidOR benchmarks by building upon two current state-of-the-art methods for each benchmark. The experiments demonstrate that the multi-label meta-weight network improves the performance for predicates in the long tail without compromising performance for head classes, resulting in better overall performance and favorable generalizability. Code: \url{https://github.com/shanshuo/ML-MWN}.
description: ICMR 2023
SymmetricNet: end-to-end mesoscale eddy detection with multi-modal data fusion
Creators: name: Zhao, Y
name: Fan, Z
name: Li, H
name: Zhang, R
name: Xiang, Wei
name: Wang, S
name: Zhong, G
Publisher: name: La Trobe
Year: 2023
Subjects: classificationCode: 3705
subject: Geology
subject: FOS: Earth and related environmental sciences
classificationCode: 3103
subject: Ecology
subject: FOS: Biological sciences
classificationCode: 3708
subject: Oceanography
classificationCode: 4611
subject: Machine learning

description: Mesoscale eddies play a significant role in marine energy and matter transportation. Due to their huge impact on the ocean, mesoscale eddy detection has been studied for many years. However, existing methods mainly use single-modal data, such as the sea surface height (SSH), to detect mesoscale eddies, resulting in inaccurate detection results. In this paper, we propose an end-to-end mesoscale eddy detection method based upon multi-modal data fusion. Particularly, we don’t only use SSH, but also add data of other two modals, i.e., the sea surface temperature (SST) and the velocity of flow, which are closely related to mesoscale eddy detection. Moreover, we design a novel network named SymmetricNet, which is able to achieve multi-modal data fusion in mesoscale eddy detection. The proposed SymmetricNet mainly contains a downsampling pathway and an upsampling pathway, where the low-level feature maps from the downsampling pathway and the high-level feature maps from the upsampling pathway are merged through lateral connections. In addition, we apply dilated convolutions to the network structure to increase the receptive field without sacrificing resolution. Experiments on multi-modal mesoscale eddy dataset demonstrate the advantages of the proposed method over previous approaches for mesoscale eddy detection.
Paul Ferraro audition tape
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019
Subjects: Music

description: The host reads "The Walrus and the Carpenter" by Lewis Carroll. The host interviews people about who they plan to vote for in the 1972 presidential election. Opera music plays. Final part of the clip (of the host playing songs) takes place about a week after the 1972 presidential election, which occurred on November 7, 1972. "Sweet Virginia" by the Rolling Stones plays. "Acute Schizophrenia Paranoia Blues" by the Kinks plays. "You Can't Always Get What You Want" by the Rolling Stones plays.
Equilibrium and non-Equilibrium regimes in the learning of Restricted Boltzmann Machines
Creators: name: Decelle, Aurélien
name: Furtlehner, Cyril
name: Seoane, Beatriz
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Training Restricted Boltzmann Machines (RBMs) has been challenging for a long time due to the difficulty of computing precisely the log-likelihood gradient. Over the past decades, many works have proposed more or less successful training recipes but without studying the crucial quantity of the problem: the mixing time, i.e. the number of Monte Carlo iterations needed to sample new configurations from a model. In this work, we show that this mixing time plays a crucial role in the dynamics and stability of the trained model, and that RBMs operate in two well-defined regimes, namely equilibrium and out-of-equilibrium, depending on the interplay between this mixing time of the model and the number of steps, $k$, used to approximate the gradient. We further show empirically that this mixing time increases with the learning, which often implies a transition from one regime to another as soon as $k$ becomes smaller than this time. In particular, we show that using the popular $k$ (persistent) contrastive divergence approaches, with $k$ small, the dynamics of the learned model are extremely slow and often dominated by strong out-of-equilibrium effects. On the contrary, RBMs trained in equilibrium display faster dynamics, and a smooth convergence to dataset-like configurations during the sampling. Finally we discuss how to exploit in practice both regimes depending on the task one aims to fulfill: (i) short $k$ can be used to generate convincing samples in short learning times, (ii) large $k$ (or increasingly large) is needed to learn the correct equilibrium distribution of the RBM. Finally, the existence of these two operational regimes seems to be a general property of energy based models trained via likelihood maximization.
description: 12 page, 4 figures. accepted to Neurips 2021 Supplementary Material
Cours d’épigraphie latine par René Cagnat, Paris 1898
Creators: name: Diehl, Ernst
Publisher: name: Bonner Jahrbücher
Year: 2017

description: Rezension zu: Cours d’épigraphie latine par René Cagnat. Troisième édition revue et augmentée. Paris 1898. Albert Fontemoing, 4 rue le Goff. gr. 8° XXVI und 469 S.
description: Bonner Jahrbücher, Bd. 104 (1899): Bonner Jahrbücher : Jahrbücher des Vereins von Altertumsfreunden im Rheinlande
Homologically visible closed geodesics on complete surfaces
Creators: name: Allais, Simon
name: Soethe, Tobias
Publisher: name: arXiv
Year: 2020
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C22, 58E10

description: In this article, we give multiple situations when having one or two geometrically distinct closed geodesics on a complete Riemannian cylinder $M\simeq S^1\times\mathbb{R}$ or a complete Riemannian plane $M\simeq\mathbb{R}^2$ leads to having infinitely many geometrically distinct closed geodesics. In particular, we prove that any complete cylinder with isolated closed geodesics has zero, one or infinitely many homologically visible closed geodesics; this answers a question of Alberto Abbondandolo.
description: 16 pages, 3 figures
Locality defeats the curse of dimensionality in convolutional teacher-student scenarios
Creators: name: Favero, Alessandro
name: Cagnetta, Francesco
name: Wyart, Matthieu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (stat.ML)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Convolutional neural networks perform a local and translationally-invariant treatment of the data: quantifying which of these two aspects is central to their success remains a challenge. We study this problem within a teacher-student framework for kernel regression, using `convolutional' kernels inspired by the neural tangent kernel of simple convolutional architectures of given filter size. Using heuristic methods from physics, we find in the ridgeless case that locality is key in determining the learning curve exponent $β$ (that relates the test error $ε_t\sim P^{-β}$ to the size of the training set $P$), whereas translational invariance is not. In particular, if the filter size of the teacher $t$ is smaller than that of the student $s$, $β$ is a function of $s$ only and does not depend on the input dimension. We confirm our predictions on $β$ empirically. We conclude by proving, using a natural universality assumption, that performing kernel regression with a ridge that decreases with the size of the training set leads to similar learning curve exponents to those we obtain in the ridgeless case.
description: 32 pages, 7 figures
Relativistic Krori-Barua Compact Stars in $f(R,T)$ Gravity
Creators: name: Shamir, M. Farasat
name: Asghar, Zoya
name: Malik, Adnan
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: This work aims to investigate the behaviour of compact stars in the background of $f(R, T)$ theory of gravity. For current work, we consider the Krori-Barua metric potential i.e., $ν(r)= Br^2+C$ and $λ(r)= Ar^2,$ where, $A, B$ and $C$ are constants. We use matching conditions of spherically symmetric space-time with Schwarzschild solution as an exterior geometry and examine the physical behaviour of stellar structure by assuming the exponential type $f(R, T)$ gravity model. In the present analysis, we discuss the graphical behaviour of energy density, radial pressure, tangential pressure, equation of state parameters, anisotropy and stability analysis respectively. Furthermore, an equilibrium condition can be visualized through the modified Tolman-Oppenheimer-Volkov equation. Some extra features of compact stars i.e. mass-radius function, compactness factor and surface redshift have also been investigated. Conclusively, all the results in current study validate the existence of compact stars under exponential $f(R, T)$ gravity model.
description: 11 pages, 9 figures
Orthogonal Time Frequency Space Modulation: A Discrete Zak Transform Approach
Creators: name: Lampel, Franz
name: Alvarado, Alex
name: Willems, Frans M. J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: Information Theory (cs.IT)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: In orthogonal time frequency space (OTFS) modulation, information-carrying symbols reside in the delay-Doppler (DD) domain. By operating in the DD domain, an appealing property for communication arises: time-frequency (TF) dispersive channels encountered in high mobility environments become time-invariant. The time-invariance of the channel in the DD domain enables efficient equalizers for time-frequency dispersive channels. In this paper, we propose an OTFS system based on the discrete Zak transform. The presented formulation not only allows an efficient implementation of OTFS but also simplifies the derivation and analysis of the input-output relation of TF dispersive channel in the DD domain.
description: 13 pages, 11 figures, submitted to IEEE Transaction on Wireless Communications
A Glimpse of International Cooperation in Astrophysical Sciences in India
Creators: name: Sagar, Ram
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Astronomy and Astrophysics is an observational science dealing with celestial objects. Aryabhatta Research Institute of Observational Sciences (ARIES) is one of the premier institutions in astronomy and astrophysics and has contributed significantly in this field. No doubt, India is a part of several mega-science projects in the domain of Astronomy and Astrophysics, such as the Thirty Meter Telescope (TMT); Square Kilometer Array (SKA) and Laser Interferometer Gravitational-wave Observatory (LIGO) projects. Growing engagement of India with mega-science projects has brought a positive impact on its science and technology landscape. A few such collaborations are mentioned to demonstrate that international cooperation are necessary in the field of Astrophysical sciences.
description: 4 pages, 1 figure, Invited article
title: Δομές φιλοξενίας για πρόσφυγες με φυσικά υλικά στην περιοχή του Μεταξουργείου
title: Hosting accommodation for refugees in Metaxourgeio with natural materials
Creators: name: Ματιατου Αμαλια
name: Σαμπανη Σοφια
Publisher: name: Technical University of Crete
Year: 2019

description: Η διπλωματική αυτή επικεντρώνεται στο έντονο πρόβλημα του προσφυγικού κύματος που έχει δεχτεί η χώρα μας τα τελευταία χρόνια. Η λύση του προσεγγίζεται μέσω της δημιουργίας ενός συστήματος κατοικιών από φυσική δόμηση, τις οποίες θα φτιάχνουν οι ίδιοι. Η μετεγκατάσταση των προσφύγων από τους καταυλισμούς φιλοξενίας σε πιο αξιοπρεπείς συνθήκες διαβίωσης, έχει σκοπό την άμβλυνση του αισθήματος ασφάλειας και την καλύτερη ενσωμάτωσή τους από ελληνική κοινωνία. Η περιοχή του Μεταξουργείου επιλέχθηκε πιλοτικά ως πρώτη περιοχή εφαρμογής της πρότασης καθώς συνδυάζει τις αναγκαίες  κοινωνικές υπηρεσίες και αντίστοιχες κοινωνικές ομάδες, που υπάρχουν ήδη σε αυτήν.
title: 'Το κοιμητήριο στην πόλη', Επανασχεδιασμός του κοιμητηρίου του Αγίου Λουκά στα Χανιά
title: 'The cemetery inside city', Redesigning Saint Luca’s cemetery in Chania
Creators: name: Ανδρεαδης Αντωνιος
Publisher: name: Technical University of Crete
Year: 2019

description: Η παρούσα διπλωματική αφορά τον επανασχεδιασμό του κοιμητηρίου του Αγίου Λουκά μέσα από το πρίσμα της κατάργησης των «εντός των τειχών» μακάβριων κοιμητηρίων. Το κοιμητήριο προσεγγίζεται ως ένας διακριτός αρχιτεκτονικός τύπος κατά τον οποίο αλληλεπιδρούν αρχιτεκτονική και τοπίο. Με σημείο αναφοράς το κοιμητήριο igualada, του Miralles, όπου  εκεί ο αρχιτέκτονας προτείνει την δημιουργία ενός υπόσκαφου κοιμητηρίου, την ταφή σε κόγχες και την μεταφορική σύνδεσή του με τον μυθικό ποταμό Αχέρωντα , η διπλωματική επιχειρεί να συσχετιστεί με αυτά τα στοιχεία και να προσδώσει στην πόλη έναν ανοιχτό δημόσιο χώρο πρασίνου.
title: Το φαινόμενο του στενού οικοπέδου στο Τόκιο_Το ζήτημα της κατοίκησης
title: The narrow plot phenomenon in Tokyo_The issue of habitation
Creators: name: Γεωργακοπουλου Φωτεινη
Publisher: name: Technical University of Crete
Year: 2019

description: Η παρούσα ερευνητική εργασία πραγματεύεται το φαινόμενο του στενού οικοπέδου στη σύγχρονη πόλη του Τόκιο.Εστιάζει στη θέση της κατοικίας, μέσα στις δυσμενείς χωρικά, αστικές συνθήκες της Ιαπωνικής πρωτεύουσας και συγκεκριμένα, στα kyosho jutaku (micro houses) , ή μικρά σπίτια, τα οποία εξαπλώνονται στην πόλη.Στην προσπάθεια ερμηνείας του φαινομένου, επιχειρείται η ανάλυση των παραγόντων, οι οποίοι διαμόρφωσαν τη σημερινή εικόνα της πόλης , καθώς και η κατανόηση της έννοιας του «μικρού»  στην Ιαπωνική κουλτούρα.
title: Από την αναπαράσταση στην παρουσία του αισθητού: συναρμογές λογικής και αίσθησης στην εικαστική και αρχιτεκτονική εικόνα
title: From representation to the presence of sensible: articulations of logic and sense in the visual and architectural image
Creators: name: Γερογιαννακη Μαρια
name: Στρατακη Ευγενια
Publisher: name: Technical University of Crete
Year: 2019

description: Η εργασία εξετάζει πώς η σύγχρονη θεωρητική και πολιτική σκέψη για την καλλιτεχνική εικόνα, είτε την αρχιτεκτονική είτε την εικαστική, μετατοπίζεται από ζητήματα αναπαράστασης σε θέματα  έκφρασης της αίσθησης για τα πράγματα.
Είναι ευρέως αποδεκτό ότι η Δυτική σκέψη είναι σε γενικές γραμμές συντεταγμένη με τα δόγματα της ορθής λογικής και της αναπαράστασης. Η αναπαραστατική σκέψη υπόκειται σε μία σχέση ιεράρχησης και εξάρτησης καθώς  είναι συνυφασμένη με την υπόθεση ότι υπάρχει ένα «αντικειμενικό» πρωτότυπο -ο πραγματικός ή ιδεατός κόσμος- με βάση τον οποίο οργανώνεται, δευτερευόντως, η σκέψη ως αντίγραφό του.

Κάθε αναπαράσταση ορίζει συγκεκριμένους τρόπους συναρμογής του κόσμου και της οπτικής του, που συνήθως συνδέεται  με την οπτική αντίληψη. Η όραση ωστόσο, δεν αποτελεί κάποιο φυσιολογικό χαρακτηριστικό του ανθρώπου αλλά  «κατασκευάζεται» εντός κοινωνικών, πολιτισμικών πλαισίων και διαμορφώνεται μέσω τεχνολογικών και αφηγηματικών τακτικών και μέσων που προσδιορίζουν την κατεύθυνση του βλέμματος.

Το οπτικό όλο στη δυτική λογική συσχετισμένο με την αναπαραστατική ιδιότητα της αρχιτεκτονικής (μορφολογική, στυλιστική, τυπολογική, κ.τ.λ.), οργανώνεται και συντίθεται σύμφωνα με κλειστά συστήματα σκέψης και έκφρασης καθώς αυτά παράγουν αλλά και προϋποθέτουν σταθερές αφηγήσεις και ταυτότητες. Η αρχιτεκτονική συλλαμβάνεται με όρους απεικονιστικής φόρμας προκαλώντας έτσι την εξασθένιση της δημιουργικής σκέψης και πράξης για τον χώρο. Παράλληλα, στο ευρύτερο καλλιτεχνικό πεδίο, τα έργα τέχνης αντιμετωπίζονται ως αυτόνομες οντότητες που πριμοδοτούν την οπτική εμπειρία έναντι άλλων τάξεων της εμπειρίας.
Στόχος της εργασίας είναι η απεμπλοκή της συνθετικής σκέψης από αντιλήψεις και εικόνες που την αιχμαλωτίζουν στην αναπαραγωγή στερεότυπων, εξετάζοντας εναλλακτικές θεωρήσεις της εικόνας. Σε αυτές τις εναλλακτικές εκφάνσεις του αισθητού διερευνώνται οι τρόποι με τους οποίους η σύγχρονη σκέψη μπορεί να αποσταθεροποιήσει τις κυρίαρχες αφηγήσεις που η αναπαράσταση επιβάλλει.

Με βάση τα παραπάνω,  θα μελετηθεί η σύγχρονη θεωρητική σκέψη, κινούμενη σε διαφορετικά γνωστικά πεδία (φιλοσοφικό, καλλιτεχνικό, αρχιτεκτονικό, πολιτικό) με κύριους εκπροσώπους τους Gilles Deleuze, Georges Didi-Huberman και Jacques Rancière, οι οποίοι προσεγγίζουν την έννοια της εικόνας της αίσθησης και της σκέψης, και ευρύτερα την αισθητική, με τρόπο που αποσταθεροποιεί τις παγιωμένες αναπαραστάσεις, κινούμενοι στα όρια του ορατού και του νοητού, στα όρια της γνώσης και της μη-γνώσης. Οι θεωρήσεις αυτές θα συσχετιστούν με χαρακτηριστικά παραδείγματα στο καλλιτεχνικό και αρχιτεκτονικό πεδίο.
Paul Gorman, AM-FM-OM-BM
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019
Subjects: Soul music

description: Party Doll by Buddy Knox plays. Call-ins about motown/soul music. "I Put a Spell on You" by the Animals plays. "Don't Mess With Bill" by Wanda Rogers plays. "Rescue Me" by Aretha Franklin plays. "Sure Gonna Miss Her" by Gary Lewis and the Playboys plays
Optimal approximate transpose map via quantum designs and its applications to entanglement detection
Creators: name: Kalev, Amir
name: Bae, Joonwoo
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We show that quantum designs characterize the general structure of the optimal approximation of the transpose map on quantum states. Based on this characterization, we propose an implementation of the approximate transpose map by a measurement-and-preparation scheme. The results show that state-manipulation in quantum two-designs suffices for transpose-based quantu3 information applications. In particular, we present how these results can be applied to the framework of detecting multipartite entangled states, for instance, when local measurements or interferometry-based experimental approaches are applied.
description: 5 pages, 3 figures
Pataki
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019

description: Larry Estridge and Ron Turner play rock songs, including "Let Me Die In My Footsteps," "Spirits of the Revolution," and "Shake Your Hips." Fass and Richard Edelman (?) are in the studio talking about various topics. "Lullaby" by Loudon Wainwright III plays
Advancing full-field metrology: rapid 3D imaging with geometric phase ferroelectric liquid crystal technology in full-field optical coherence microscopy
Creators: name: Zheng, W
name: Kou, Shanshan
name: Sheppard, CJR
name: Roy, M
Publisher: name: La Trobe
Year: 2023
Subjects: classificationCode: 5102
subject: Atomic, molecular and optical physics
classificationCode: 3212
subject: Ophthalmology and optometry
classificationCode: 4003
subject: Biomedical engineering

description: Optical coherence microscopy (OCM) is a variant of OCT in which a high-numerical aperture lens is used. Full-field OCM (FF-OCM) is an emerging non-invasive, label-free, interferometric technique for imaging of surface structures or semi-transparent biomedical subjects with micron-scale resolutions. Different approaches to three dimensional full-field optical metrology are reviewed. The usual method for the phase-shifting technique in FF-OCM involves mechanically moving a mirror to change the optical path difference for obtaining en-face OCM images. However, with the use of a broadband source in FF-OCM, the phase shifts of different spectral components are not the same, resulting in the ambiguities in 3D image reconstruction. In this study, we demonstrate, by imaging tissues and cells, a unique geometric phase-shifter based on ferroelectric liquid crystal technology, to realize achromatic phase-shifting for rapid three-dimensional imaging in a FF-OCM system.
White Dwarfs constrain Dark Forces
Creators: name: Dreiner, Herbert K.
name: Fortin, Jean-François
name: Isern, Jordi
name: Ubaldi, Lorenzo
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The white dwarf luminosity function, which provides information about their cooling, has been measured with high precision in the past few years. Simulations that include well known Standard Model physics give a good fit to the data. This leaves little room for new physics and makes these astrophysical objects a good laboratory for testing models beyond the Standard Model. It has already been suggested that white dwarfs might provide some evidence for the existence of axions. In this work we study the constraints that the white dwarf luminosity function puts on physics beyond the Standard Model involving new light particles (fermions or bosons) that can be pair-produced in a white dwarf and then escape to contribute to its cooling. We show, in particular, that we can severely constrain the parameter space of models with dark forces and light hidden sectors (lighter than a few tens of keV). The bounds we find are often more competitive than those from current lab searches and those expected from most future searches.
description: 25 pages, 8 figures, equivalent to published version
title: Одномерная классическая модель динамики кристаллической решетки с учетом запаздывающих взаимодействий
Creators: name: Захаров, Анатолий
name: Захаров, Максим
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2022

description: Динамика колебаний одномерной атомной цепочки исследуется в гармоническом приближении с учетом запаздывания межатомных взаимодействий. Обнаружено, что запаздывание взаимодействий между частицами приводит к радикальной перестройке динамики одномерной гармонической цепочки. В частности, из-за запаздывания взаимодействий стационарные свободные колебания в атомной цепочке невозможны. Получен критерий отсутствия нарастающих колебаний в системе, этот критерий является условием стабильности цепочки. Показано, что при погружении устойчивой цепочки частиц с запаздывающими взаимодействиями между ними в переменное внешнее поле система переходит в стационарное состояние, которое зависит как от свойств системы, так и от характеристик внешнего поля. Это стационарное состояние было интерпретировано как динамическое равновесие между атомной цепочкой и внешним полем.
Matronen-Terrakotta aus Bonn. Nebst Bemerkungen zum Matronenkultus
Creators: name: Siebourg, Max
Publisher: name: Bonner Jahrbücher
Year: 2017

description: [nicht vorhanden / not available]
description: Bonner Jahrbücher, Bd. 105 (1900): Bonner Jahrbücher : Jahrbücher des Vereins von Altertumsfreunden im Rheinlande
Pastiche Tape
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019

description: Excerpt of men discussing Bob Dylan's career. Medley of experimental music, stand-up comedy, and rock n' roll music plays. A tape plays of Paul Krassner's stand up. Tapes of previous guests, including Lena (?) and Marion Brash. Quick excerpts of various interviews about books, movies, birth control. Genesis chapter 3 is read over music by Pat Boone.
Frobenius objects in the category of spans
Creators: name: Contreras, Ivan
name: Keller, Molly
name: Mehta, Rajan Amit
Publisher: name: arXiv
Year: 2021
Subjects: subject: Category Theory (math.CT)
subject: Mathematical Physics (math-ph)
subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 18B10, 18B40, 18C40, 18N50, 20L05, 57R56

description: We consider Frobenius objects in the category Span, where the objects are sets and the morphisms are isomorphism classes of spans of sets. We show that such structures are in correspondence with data that can be characterized in terms of simplicial sets. An interesting class of examples comes from groupoids. Our primary motivation is that Span can be viewed as a set-theoretic model for the symplectic category, and thus Frobenius objects in Span provide set-theoretic models for classical topological field theories. The paper includes an explanation of this relationship.
description: v2: added sections 3.5 and 4.5, explaining the relationship to 2-Segal sets
Semi-supervised multiple testing
Creators: name: Mary, David
name: Roquain, Etienne
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistics Theory (math.ST)
subject: Methodology (stat.ME)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: An important limitation of standard multiple testing procedures is that the null distribution should be known. Here, we consider a null distribution-free approach for multiple testing in the following semi-supervised setting: the user does not know the null distribution, but has at hand a sample drawn from this null distribution. In practical situations, this null training sample (NTS) can come from previous experiments, from a part of the data under test, from specific simulations, or from a sampling process. In this work, we present theoretical results that handle such a framework, with a focus on the false discovery rate (FDR) control and the Benjamini-Hochberg (BH) procedure. First, we provide upper and lower bounds for the FDR of the BH procedure based on empirical $p$-values. These bounds match when $α(n+1)/m$ is an integer, where $n$ is the NTS sample size and $m$ is the number of tests. Second, we give a power analysis for that procedure suggesting that the price to pay for ignoring the null distribution is low when $n$ is sufficiently large in front of $m$; namely $n\gtrsim m/(\max(1,k))$, where $k$ denotes the number of ``detectable'' alternatives. Third, to complete the picture, we also present a negative result that evidences an intrinsic transition phase to the general semi-supervised multiple testing problem {and shows that the empirical BH method is optimal in the sense that its performance boundary follows this transition phase}. Our theoretical properties are supported by numerical experiments, which also show that the delineated boundary is of correct order without further tuning any constant. Finally, we demonstrate that our work provides a theoretical ground for standard practice in astronomical data analysis, and in particular for the procedure proposed in \cite{Origin2020} for galaxy detection.
Patrick Sky, Steve Post
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019

description: Unknown vaudeville music plays. "Sometimes I Wonder," by Patirck Sky plays. Another song by Patrick Sky plays. Unknown jazz music plays. "Follow the Long Haired Lady," by an unknown artist plays. "I am the Very Model of a Modern Major-General," plays. "Jimmy Clay," plays.
Optimal nonequilibrium thermometry in Markovian environments
Creators: name: Sekatski, Pavel
name: Perarnau-Llobet, Martí
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: What is the minimum time required to take a temperature? In this paper, we solve this question for a large class of processes where temperature is inferred by measuring a probe (the thermometer) weakly coupled to the sample of interest, so that the probe's evolution is well described by a quantum Markovian master equation. Considering the most general control strategy on the probe (adaptive measurements, arbitrary control on the probe's state and Hamiltonian), we provide bounds on the achievable measurement precision in a finite amount of time, and show that in many scenarios these fundamental limits can be saturated with a relatively simple experiment. We find that for a general class of sample-probe interactions the scaling of the measurement uncertainty is inversely proportional to the time of the process, a shot-noise like behaviour that arises due to the dissipative nature of thermometry. As a side result, we show that the Lamb shift induced by the probe-sample interaction can play a relevant role in thermometry, allowing for finite measurement resolution in the low-temperature regime. More precisely, the measurement uncertainty decays polynomially with the temperature as $T\rightarrow 0$, in contrast to the usual exponential decay with $T^{-1}$. We illustrate these general results for (i) a qubit probe interacting with a bosonic sample, where the role of the Lamb shift is highlighted, and (ii) a collective superradiant coupling between a $N$-qubit probe and a sample, which enables a quadratic decay with $N$ of the measurement uncertainty.
description: 20+5 pages, 5 figures. v2: changed title + minor changes. Accepted in Quantum
Part of Fanny Hill
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019

description: A calliope plays "Entrance of the Gladiators." A cover of "Dear Little Cafe" plays. A facetious skit about apathetic New Yorkers leading an armed rebellion against City Hall plays. A cover of "Autumn in New York" plays. A cover of "The Captains and the Kings" plays. "Where Did You Get That Hat?" by Joseph J. Sullivan plays. A facetious skit about Francisco Franco plays. A song from the play "The Hostage" plays
title: Urban commons: ανάλυση του αστικού φαινομένου των κοινών
title: Urban commons: exploring the urban phenomenon
Creators: name: Καροφυλακη Μαρια
Publisher: name: Technical University of Crete
Year: 2019

description: Το περιβάλλον των πόλεων στις μέρες μας υφίσταται συνεχώς ριζικές μεταλλάξεις  στη δομή του καθώς είναι το πεδίο προβολής όλων των πολιτικών, οικονομικών και κοινωνικών αλλαγών που συμβαίνουν. Τα τελευταία χρόνια παρατηρούμε ένα κύμα συνεχούς αύξησης της εμπορευματοποίησης και ιδιωτικοποίησης των ελεύθερων χώρων μέσα στην πόλη, σύμφωνα με τα δυτικά καπιταλιστικά πρότυπα, από ιδιωτικούς φορείς που περιορίζουν την πρόσβαση κάποιων κοινωνικών ομάδων αναλόγως με τα πρότυπα τους, δίνοντας με αυτό τον τρόπο χωρική διάσταση στις κοινωνικές ανισότητες. Από αυτές τις πρακτικές του πολιτικού συστήματος και την αφύπνιση των πολιτών προκύπτει ένας νέος τρόπος διαχείρισης του υπάρχοντος αστικού χώρου, προς την κατέυθυνση των «αστικών κοινών». Η πόλη ως κοινό σημαίνει ότι είναι ένας χώρος συνεργασίας και συλλογικότητας στον οποίο οι κάτοικοι αποτελούν κεντρικούς παράγοντες στην παραγωγή, τη διαχείριση και τη διακυβέρνηση της ζωής στην πόλη και των αστικών πόρων, από ανοιχτούς χώρους και κτίρια μέχρι υποδομές γειτονιάς και ψηφιακά δίκτυα. Ο πόρος που διαχειρίζεται το αστικό κοινό είναι ο αστικός χώρος ως πεδίο των κοινωνικών σχέσεων. Αν και στο καπιταλιστικό σύστημα ο αστικός χώρος αντιμετωπίζεται ως εμπόρευμα, τμήματα του ωστόσο μπορεί να απελευθερώνονται μέσα από διεκδικήσεις κατοίκων και κινημάτων. Έτσι σε αυτήν τη μελέτη θα προσπαθήσουμε να διευρευνήσουμε τους τρόπους, τις πρακτικές δημιουργίας και λειτουργίας ενός αστικού κοινού και ιδιαίτερα τις ποικίλες χωρικές εκφράσεις του. Προφανώς η εκάστοτε περίπτωση φέρει τα δικά της ρίσκα και κινδύνους όμως αναλύοντας τις περιπτώσεις θα δούμε τις διαφορετικές εκφάνσεις της αστικής πρακτικής των κοινών και θα αναρωτηθούμε αν τα κοινά και τα συλλογικά πεδία μπορούν να αποτελέσουν πολύτιμη πηγή γνώσης για ένα εναλλακτικό μοντέλο σχεδιαστικής πρακτικής στην πόλη του 21ου αιώνα.
Berichte über die Thätigkeit der Altertums- und Geschichtsvereine und über die Vermehrung der städtischen und Vereinssammlungen innerhalb der Rheinprovinz
Creators: name: Redaktion, Die
Publisher: name: Bonner Jahrbücher
Year: 2017

description: [nicht vorhanden / not available]
description: Bonner Jahrbücher, Bd. 105 (1900): Bonner Jahrbücher : Jahrbücher des Vereins von Altertumsfreunden im Rheinlande
Receiving Rice from Farm Trucks at Commercial Dryers
Creators: name: Slay, W. O.
name: Hutchison, Reed S.
name: Slay, W. O.
name: Hutchison, Reed S.
Publisher: name: Unknown
Year: 1961
Subjects: Crop Production/Industries
Labor and Human Capital
Production Economics
Research and Development/Tech Change/Emerging Technologies

description: Excerpts from the report: The amount of rice grown in the United States increased considerably between 1950 and 1960. Improvements in harvesting methods and equipment not only kept pace with this increase, but shortened the harvest season. As a consequence, trucks used to transport rice from field to dryer increased in number and size in the same relatively short period of time. The rice dryers, built to dry and handle a given volume of rice, could not change quite as rapidly. Any appreciable increase in the volume received necessitated an expensive modification in the drying and handling facilities. To avoid unnecessary expense, dryer operators became increasingly interested in improved methods and equipment for handling rice. The purpose of this research was to determine what methods and equipment operators of commercial dryers could use to increase labor and equipment utilization and thereby reduce handling costs.
Quantum Energy Landscape and VQA Optimization
Creators: name: Kim, Joonho
name: Oz, Yaron
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the effects of entanglement and control parameters on the energy landscape and optimization performance of the variational quantum circuit. Through a systematic analysis of the Hessian spectrum, we characterize the local geometry of the energy landscape at a random point and along an optimization trajectory. We argue that decreasing the entangling capability and increasing the number of circuit parameters have the same qualitative effect on the Hessian eigenspectrum. Both the low-entangling capability and the abundance of control parameters increase the curvature of non-flat directions, contributing to the efficient search of area-law entangled ground states as to the optimization accuracy and the convergence speed.
description: 12 pages, 11 figures
title: The Side Effects of Safe Asset Creation
Creators: name: Acharya, Sushant
name: Dogra, Keshav
Publisher: name: Bank of Canada
Year: 2021

description: The secular decline in real interest rates has created a challenge for monetary policy, now confronting the zero lower bound more often. An increase in the supply of safe assets reduces downward pressure on the natural interest rate. This allows monetary policy to reach price stability and full employment, but not without cost—permanently lower investment.

description: La baisse tendancielle des taux d’intérêt réels représente un défi pour la politique monétaire, laquelle se retrouve plus fréquemment contrainte par la borne zéro sur le taux d’intérêt nominal. Une hausse de l’offre d’actifs sûrs permet de réduire les pressions à la baisse sur le taux d’intérêt naturel. Il est alors possible de réaliser les objectifs de stabilité des prix et de plein emploi visés par la politique monétaire – au prix, cependant, d’un investissement moindre.