cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Fishyscapes Benchmark: Measuring Blind Spots in Semantic Segmentation
Creators: name: Blum, Hermann
name: Sarlin, Paul-Edouard
name: Nieto, Juan
name: Siegwart, Roland
name: Cadena, Cesar
Publisher: name: arXiv
Year: 2019
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Deep learning has enabled impressive progress in the accuracy of semantic segmentation. Yet, the ability to estimate uncertainty and detect failure is key for safety-critical applications like autonomous driving. Existing uncertainty estimates have mostly been evaluated on simple tasks, and it is unclear whether these methods generalize to more complex scenarios. We present Fishyscapes, the first public benchmark for uncertainty estimation in a real-world task of semantic segmentation for urban driving. It evaluates pixel-wise uncertainty estimates towards the detection of anomalous objects in front of the vehicle. We~adapt state-of-the-art methods to recent semantic segmentation models and compare approaches based on softmax confidence, Bayesian learning, and embedding density. Our results show that anomaly detection is far from solved even for ordinary situations, while our benchmark allows measuring advancements beyond the state-of-the-art.
description: bechmark website: https://fishyscapes.com/
Computing special values of motivic L-functions
Creators: name: Dokchitser, Tim
Publisher: name: arXiv
Year: 2002
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11M99 (Primary) 14G10, 11G40, 11R42, 11M41, 11F66 (Secondary)

description: We present an algorithm to compute values L(s) and derivatives of L-functions of motivic origin numerically to required accuracy. Specifically, the method applies to any L-series whose Gamma-factor is a product of any number of Gamma-functions Gamma((s+l(j))/2) with complex l(j), not necessarily distinct. The algorithm relies on the known (or conjectural) functional equation for L(s).
description: 19 pages (LaTeX), for PARI implementation and examples see http://maths.dur.ac.uk/~dma0td/computel/
Geometric Justification of the Fundamental Interaction Fields for the Classical Long-Range Forces
Creators: name: Gueorguiev, V. G.
name: Maeder, Andre
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mathematical Physics (math-ph)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: Based on the principle of reparametrization invariance, the general structure of physically relevant classical matter systems is illuminated within the Lagrangian framework. In a straightforward way, the matter Lagrangian contains background interaction fields, such as a 1-form field analogous to the electromagnetic vector potential and symmetric tensor for gravity. The geometric justification of the interaction field Lagrangians for the electromagnetic and gravitational interactions are emphasized. The generalization to E-dimensional extended objects (p-branes) embedded in a bulk space M is also discussed within the light of some familiar examples. The concept of fictitious accelerations due to un-proper time parametrization is introduced, and its implications are discussed.The framework naturally suggests new classical interaction fields beyond electromagnetism and gravity. The simplest model with such fields is analyzed and its relevance to dark matter and dark energy phenomena on large/cosmological scales is inferred. Unusual pathological behavior in the Newtonian limit is suggested to be a precursor of quantum effects and of inflation-like processes at microscopic scales.
description: 24 pages, no figures. arXiv admin note: substantial text overlap with arXiv:math-ph/0512082, arXiv:math-ph/0210021
title: Ιntroduction à la syntaxe du français
title: Une approche linguistique de la phrase française et de ses constituants
titleType: AlternativeTitle
title: Εισαγωγή στη σύνταξη της γαλλικής γλώσσας
title: Μια γλωσσολογική προσέγγιση στη γαλλική πρόταση και τα συστατικά της
titleType: AlternativeTitle
Creators: name: Delveroudi, Rea
name: Moustaki, Argyro
name: Vlachou, Evangelia
Publisher: name: Kallipos, Open Academic Editions
Year: 2024
Subjects: Σύνταξη
Syntaxe
Γαλλική γλώσσα
Langue française
Πρόταση
Phrase
Άμεσα συστατικά
Constituants immédiats
Επίπεδα γλωσσικής ανάλυσης
Niveaux d’analyse linguistique
Είδη προτάσεων
Types de phrases
Γραμματικές κατηγορίες
Catégories grammaticales
Συντακτικές λειτουργίες
Fonctions syntaxiques
Σημασιολογικοί ρόλοι
Rôles sémantiques
Μοντέλο του Χ τονουμένου
Modèle X-barre
Ονοματική φράση
Groupe nominal
Ρηματική φράση
Groupe verbal
Επιθετική φράση
Groupe adjectival
Προθετική φράση
Groupe prépositionnel
Επιρρηματική φράση
Groupe adverbial
Δευτερεύουσες προτάσεις
Les subordonnées

description: Αντικείμενο του βιβλίου είναι η Σύνταξη, ένα από τα επίπεδα γλωσσικής ανάλυσης σύμφωνα με τη σύγχρονη γλωσσολογία, και η εφαρμογή ...
description: Αντικείμενο του βιβλίου είναι η Σύνταξη, ένα από τα επίπεδα γλωσσικής ανάλυσης σύμφωνα με τη σύγχρονη γλωσσολογία, και η εφαρμογή ...
High-Resolution MHD Spectroscopy of External Kinks in a Tokamak Plasma
Creators: Shiraki, Daisuke
Publisher: name: Columbia University
Year: 2012
Subjects: Plasma (Ionized gases)
Physics

description: This thesis describes the first results of passive and active MHD spectroscopy experiments on the High Beta Tokamak-Extended Pulse (HBT-EP) device using a new array of magnetic diagnostics and coils.  The capabilities of the HBT-EP experiment are significantly extended with the installation of a new adjustable conducting wall, high-power modular control coil arrays, and an extensive set of 216 magnetic sensors that allow simultaneous high-resolution detection of multimode MHD phenomena.  The design, construction, and calibration of this system are described.  The capability of this new magnetic diagnostic set is demonstrated by biorthogonal decomposition analysis of passive measurements of rotating resistive wall modes (RWMs).  A strong multimode effect is detected for the first time in HBT-EP plasmas consisting of the simultaneous existence of m/n=3/1 and 6/2 RWMs which cause the plasma to evolve in a non-rigid multimode manner.  Additional mode numbers as high as n=3 are also observed.  Active MHD spectroscopy experiments using a "phase-flip" resonant magnetic perturbation (RMP) are able to excite a clear three-dimensional response. By adjusting the helicity of the magnetic field applied by the control coils, the driven plasma response is shown to be predominantly resonant field amplification.  When the amplitude of the applied field is not too large, the driven resonant response appears linear, independent of the presence of background MHD phenomena and consistent with the predictions of single-helicity modeling of kink mode dynamics.  The spatial structures of both the naturally rotating kink mode and the externally driven response are observed to be identical, while the temporal evolutions are approximately independent.  The phase-flip driven plasma response is measured as a function of edge safety factor, plasma rotation, and the amplitude of the applied magnetic perturbation. As the RMP amplitude increases, the plasma response is shown to be linear, saturated, and ultimately, disruptive.
Edge currents in the absence of edges
Creators: name: Exner, Pavel
name: Joye, Alain
name: Kovarik, Hynek
Publisher: name: arXiv
Year: 1999
Subjects: subject: Condensed Matter (cond-mat)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate a charged two-dimensional particle in a homogeneous magnetic field interacting with a periodic array of point obstacles. We show that while Landau levels remain to be infinitely degenerate eigenvalues, between them the system has bands of absolutely continuous spectrum and exhibits thus a transport along the array. We also compute the band functions and the corresponding probability current.
description: Final version, to appear in Phys. Lett. A; 10 LaTeX pages with 3 eps figures
Intertwining relations of non-stationary Schrödinger operators
Creators: name: Cannata, F.
name: Ioffe, M.
name: Junker, G.
name: Nishnianidze, D.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: General first- and higher-order intertwining relations between non-stationary one-dimensional Schrödinger operators are introduced. For the first-order case it is shown that the intertwining relations imply some hidden symmetry which in turn results in a $R$-separation of variables. The Fokker-Planck and diffusion equation are briefly considered. Second-order intertwining operators are also discussed within a general approach. However, due to its complicated structure only particular solutions are given in some detail.
description: 18 pages, LaTeX209
High-dimensional asymptotics: new insights and methods
Creators: Wang, Shuaiwen
Publisher: name: Columbia University
Year: 2020
Subjects: subject: Statistics
subject: FOS: Mathematics
subject: Linear models (Statistics)
subject: Regression analysis--Asymptotic theory
subject: Estimation theory--Asymptotic theory
subject: Standard deviations

description: As an important element of statistics, linear model y = Ax + w has gained a lot of attention for decades. With the emergence of new data, new problems and new techniques, it is still of great interest to study this model under different settings. In this thesis, we focus on an asymptotic framework where the number of observation n is comparable to the number of variables p, and only a subset of k components of the coefficient vector x are nonzero with k being comparable to p. The prediction, variable selection and concentration properties of several techniques are studied. Regarding variable selection, we consider a class of two stage variable selection procedures, where we generate an optimally tuned Bridge regression estimator x = argmin{x} 1/2 ||y - Ax||2^2 + gamma ||x|| q^q in the first stage, and threshold this estimator in the second stage. We then compare LASSO with our two stage procedures. Further we discuss the best choice of q in the first stage. It turns out that the variable selection performance of such procedures depends on the estimation mean-square error (MSE) of the Bridge estimator. This motivates us to further study the estimation accuracy of Bridge estimators and compare their MSEs for different choices of q. The tool of approximate message passing enables us to characterize the limiting MSE and provide accurate comparison between different estimators. Next we move our focus to the SLOPE estimator x := argmin 1/2 ||y - Ax|| 2^2 + gamma sum {i=1}^p lambda_i |x|_{(i)}, where lambda_1 geq ... geq lambda_p geq 0 are the regularization parameters and |x|(1) geq ... geq |x|(p) geq 0 denote the components of the signal (or regression coefficients) in the decreasing order. We provide an accurate comparison between the MSE of SLOPE and that of the bridge estimators. The non-separable nature of SLOPE makes it hard to characterize its limiting MSE as p --> infinity. Hence we first prove concentration inequalities for its MSE under finite sample and characterize the concentrated mean through a system of equations. By using the concentration results, we show SLOPE has larger MSE than LASSO in a low noise regime and larger MSE than Ridge in a large noise regime.
Discovery of a double Blue Straggler sequence in M15: new insight into the core-collapse process
Creators: name: Beccari, Giacomo
name: Ferraro, Francesco R.
name: Dalessandro, Emanuele
name: Lanzoni, Barbara
name: Raso, Silvia
name: Origlia, Livia
name: Vesperini, Enrico
name: Hong, Jongsuk
name: Sills, Alison
name: Dieball, Andrea
name: Knigge, Christian
Publisher: name: arXiv
Year: 2019
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In this paper we report on the discovery of a double blue straggler star (BSS) sequence in the core of the core-collapsed cluster M15 (NGC 7078). We performed a detailed photometric analysis of the extremely dense core of the cluster using a set of images secured with the Advanced Camera for Survey in the High Resolution Channel mode on-board the Hubble Space Telescope. The proper combination of the large number of single frames in the near-UV (F220W), and blue (F435W) filters allowed us to perform a superb modeling of the Point Spread Function and an accurate deblending procedure. The Color-Magnitude diagram revealed the presence of two distinct parallel sequences of blue stragglers. In particular, the blue BSS sequence is characterized by the intriguing presence of two different branches. The first branch appears extremely narrow, it extends up to 2.5 magnitudes brighter than the cluster main-sequence turnoff (MS-TO) point, and it is nicely reproduced by a 2 Gyr-old collisional isochrone. The second branch extends up to 1.5 magnitudes from the MS-TO and it is reproduced by a 5.5 Gyr-old collisional isochrone. Our observations suggest that each of these branches is mainly constituted by a population of nearly coeval collisional BSS of different masses generated during two episodes of high collisional activity. We discuss the possibility that the oldest episode corresponds to the core-collapse event (occurred about 5.5 Gyr ago), while the most recent one (occurred about 2 Gyr ago) is associated with a core oscillation in the post-core collapse evolution. The discovery of these features provides further strong evidence in support of the connection between the BSS properties and GC dynamical evolution, and it opens new perspectives on the study of core-collapse and post core-collapse evolution.
description: Accepted for publication on ApJ
High-dimensional Asymptotics for Phase Retrieval with Structured Sensing Matrices
Creators: Dudeja, Rishabh
Publisher: name: Columbia University
Year: 2021
Subjects: subject: Statistics
subject: FOS: Mathematics
subject: Gaussian processes
subject: Matrices
subject: Iterative methods (Mathematics)

description: Phase Retrieval is an inference problem where one seeks to recover an unknown complex-valued 𝓃-dimensional signal vector from the magnitudes of 𝓶 linear measurements. The linear measurements are specified using a 𝓶 × 𝓃 sensing matrix. This problem is a mathematical model for imaging systems arising in X-ray crystallography and other applications where it is infeasible to acquire the phase of the measurements. This dissertation presents some results regarding the analysis of this problem in the high-dimensional asymptotic regime where the number of measurements and the signal dimension diverge proportionally so that their ratio remains fixed. A limitation of existing high-dimensional analyses of this problem is that they model the sensing matrix as a random matrix with independent and identically (i.i.d.) distributed Gaussian entries. In practice, this matrix is highly structured with limited randomness. This work studies a correction to the i.i.d. Gaussian sensing model, known as the sub-sampled Haar sensing model which faithfully captures a crucial orthogonality property of realistic sensing matrices. The first result of this thesis provides a precise asymptotic characterization of the performance of commonly used spectral estimators for phase retrieval in the sub-sampled Haar sensing model. This result can be leveraged to tune certain parameters involved in the spectral estimator optimally. The second part of this dissertation studies the information-theoretic limits for better-than-random (or weak) recovery in the sub-sampled Haar sensing model. The main result in this part shows that appropriately tuned spectral methods achieve weak recovery with the information-theoretically optimal number of measurements. Simulations indicate that the performance curves derived for the sub-sampled Haar sensing model accurately describe the empirical performance curves for realistic sensing matrices such as randomly sub-sampled Fourier sensing matrices and Coded Diffraction Pattern (CDP) sensing matrices. The final part of this dissertation tries to provide a mathematical understanding of this empirical universality phenomenon: For the real-valued version of the phase retrieval problem, the main result of the final part proves that the dynamics of a class of iterative algorithms, called Linearized Approximate Message Passing schemes, are asymptotically identical in the sub-sampled Haar sensing model and a real-valued analog of the sub-sampled Fourier sensing model.
title: Erythronium grandiflorum Pursh var. pallidum
Creators: name: :None
Publisher: name: Universitätsbibliothek
Year: 2009
Subjects: subject: Digitale Pflanzenbilder: Sammlung Dietmar Brandes
subject: 580

description: Pflanzensammlung Dietmar Brandes: Digitale Pflanzenbilder
The Eckman-Hilton argument and higher operads
Creators: name: Batanin, M. A.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Category Theory (math.CT)
subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 18D05, 18D50, 55P48

description: The classical Eckmann-Hilton argument shows that two monoid structures on a set, such that one is a homomorphism for the other, coincide and, moreover, the resulting monoid is commutative. This argument immediately gives a proof of the commutativity of the higher homotopy groups. A reformulation of this argument in the language of higher categories is: suppose we have a one object, one arrow 2-category, then its $Hom$-set is a commutative monoid. A similar argument due to A.Joyal and R.Street shows that a one object, one arrow tricategory is `the same' as a braided monoidal category. In this paper we begin to investigate how one can extend this argument to arbitrary dimension. We provide a simple categorical scheme which allows us to formalise the Eckman-Hilton type argument in terms of the calculation of left Kan extensions in an appropriate 2-category. Then we apply this scheme to the case of $n$-operads in the author's sense and classical symmetric operads. We demonstrate that there exists a functor of symmetrisation $Sym_n$ from a certain subcategory of $n$-operads to the category of symmetric operads such that the category of one object, one arrow, . . ., one $(n-1)$-arrow algebras of $A$ is isomorphic to the category of algebras of $Sym_n(A)$. Under some mild conditions, we present an explicit formula for $Sym_n(A)$ which involves taking the colimit over a remarkable categorical symmetric operad. We will consider some applications of the methods developed to the theory of $n$-fold loop spaces in the second paper of this series.
description: 57pp
Walckenaeria monoceros
Creators: name: Tanasevitch, Andrei V.
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Linyphiidae
Walckenaeria
Walckenaeria monoceros

description: Walckenaeria monoceros (Wider, 1834)
MATERIAL: 1 ♀, Greece, Cyclades, Iraklia, cave “Aghio Ioannis”, 100 m a.s.l., 11. V.1985, leg. B. Hauser [Nax-85/23].
RANGE: European-Ancient Mediterranean.
description: Published as part of Tanasevitch, Andrei V., 2011, On linyphiid spiders (Araneae) from the Eastern and Central Mediterranean kept at the Muséum d'histoire naturelle, Geneva, pp. 49-91 in Revue suisse de Zoologie 118 (1) on page 89, DOI: 10.5962/bhl.part.117799, http://zenodo.org/record/6311696
Anomaly detection by using CFS subset and neural network with WEKA tools
Creators: name: Dr Jabez Jones
Publisher: name: figshare
Year: 2019
Subjects: subject: 80605 Decision Support and Group Support Systems
subject: FOS: Computer and information sciences
subject: 80704 Information Retrieval and Web Search
subject: FOS: Media and communications
subject: 80109 Pattern Recognition and Data Mining
subject: 80608 Information Systems Development Methodologies

description: An intrusion detection system (IDS) is a product application or contraption that screens the framework or system practices for methodology encroachment or dangerous activities and makes reports to the organizational framework. The principal centralization of intrusion discovery and aversion frameworks (IDPS) is to perceive the possible events, information logging about them, and interruption tries to report. Furthermore, the associations are utilizing IDPS for different purposes, such as recognizing issues identified with approaches of security, recording, and keeping the people existing dangers from encroaching arrangements of security. In this paper, anomaly is identified utilizing enhanced correlation-based feature selection (CFS), which is basically a subset technique and is based upon extreme learning machine, multilayer perceptron, and feature selection. This project scope involves identification of anomalies in the early stages and to increase the accuracy of identification or detection.
High-level, part-based features for fine-grained visual categorization
Creators: Berg, Thomas
Publisher: name: Columbia University
Year: 2017
Subjects: Optical pattern recognition
Optical data processing
Computer vision
Computer vision--Computer programs
Visual perception--Data processing
Computer science

description: Object recognition--"What is in this image?"--is one of the basic problems of computer vision.  Most work in this area has been on finding basic-level object categories such as plant, car, and bird, but recently there has been an increasing amount of work in fine-grained visual categorization, in which the task is to recognize subcategories of a basic-level category, such as blue jay and bluebird.
      Experimental psychology has found that while basic-level categories are distinguished by the presence or absence of parts (a bird has a beak but car does not), subcategories are more often distinguished by the characteristics of their parts (a starling has a narrow, yellow beak while a cardinal has a wide, red beak).  In this thesis we tackle fine-grained visual categorization, guided by this observation.  We develop alignment procedures that let us compare corresponding parts, build classifiers tailored to finding the interclass differences at each part, and then combine the per-part classifiers to build subcategory classifiers.
      Using this approach, we outperform previous work in several fine-grained categorization settings: bird species identification, face recognition, and face attribute classification.  In addition, the construction of subcategory classifiers from part classifiers allows us to automatically determine which parts are most relevant when distinguishing between any two subcategories.  We can use this to generate illustrations of the differences between subcategories.  To demonstrate this, we have built a digital field guide to North American birds which includes automatically generated images highlighting the key differences between visually similar species.  This guide, "Birdsnap," also identifies bird species in users' uploaded photos using our subcategory classifiers.  We have released Birdsnap as a web site and iPhone application.
Hawking radiation of non-Schwarzschild black holes in higher derivative gravity: a crucial role of grey-body factors
Creators: name: Konoplya, R. A.
name: Zinhailo, A. F.
Publisher: name: arXiv
Year: 2019
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The higher derivative gravity includes corrections of the second order in curvature and allows for both Schwarzschild and non-Schwarzschild asymptotically flat black-hole solutions. Here we find the grey-body factors and energy emission rates for Hawking radiation of test Dirac and electromagnetic fields in the vicinity of such a non-Schwarzschild black hole. The temperature and mass of the black hole monotonically decrease from its Schwarzschild value to zero when the coupling constant is increased up to its extremal value. Nevertheless, for small and moderate values of the coupling constant the Hawking radiation is enhanced, and only in the regime of large coupling it is suppressed, as one could expect. The reason for such counter-intuitive behavior is the important role of the grey-body factors: for small and moderate couplings the temperature falls relatively slowly, while the effective potentials for black holes of the same mass become considerably lower, allowing for much higher transmission rates. We have also estimated the lifetime of such black holes and shown that the range of black-hole masses at which ultra-relativistic emission of massive electrons and positrons starts is shifted towards smaller black-hole masses when the coupling constant is large.
description: 9 pages RevTex, minor changes of style, typos corrected A typo in formula 16 is corrected
Walckenaeria stylifrons
Creators: name: Tanasevitch, Andrei V.
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Linyphiidae
Walckenaeria
Walckenaeria stylifrons

description: Walckenaeria stylifrons (O. P.-Cambridge, 1875)
 MATERIAL: 1 ♀, Greece, Ikaria, along route Aghios Kirykos - Oxea, near Oxea, 500 m a.s.l., under stones, 22.XI.1991, leg. B. Hauser [ZS-91/37]. – 1 ♀, Samos, route Kambos - Vourliotes, above cloister “Moni Vronda”, in soil under Pinus sp., 520 m a.s.l., 26.XI.1991, leg. B. Hauser [ZS-91/64].
description: Published as part of Tanasevitch, Andrei V., 2011, On linyphiid spiders (Araneae) from the Eastern and Central Mediterranean kept at the Muséum d'histoire naturelle, Geneva, pp. 49-91 in Revue suisse de Zoologie 118 (1) on page 89, DOI: 10.5962/bhl.part.117799, http://zenodo.org/record/6311696
Conformal covariance of massless free nets
Creators: name: Lledo, Fernando
Publisher: name: arXiv
Year: 2000
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 81T05, 20C35 (Primary) 81R20 (Secondary)

description: In the present paper we review in a fibre bundle context the covariant and massless canonical representations of the Poincare' group as well as certain unitary representations of the conformal group (in 4 dimensions). We give a simplified proof of the well-known fact that massless canonical representations with discrete helicity extend to unitary and irreducible representations of the conformal group mentioned before. Further we give a simple new proof that massless free nets for any helicity value are covariant under the conformal group. Free nets are the result of a direct (i.e. independent of any explicit use of quantum fields) and natural way of constructing nets of abstract C*-algebras indexed by open and bounded regions in Minkowski space that satisfy standard axioms of local quantum physics. We also give a group theoretical interpretation of the embedding ${\got I}$ that completely characterizes the free net: it reduces the (algebraically) reducible covariant representation in terms of the unitary canonical ones. Finally, as a consequence of the conformal covariance we also mention for these models some of the expected algebraic properties that are a direct consequence of the conformal covariance (essential duality, PCT--symmetry etc.).
description: 31 pages, Latex2e
Bi-differential calculi and integrable models
Creators: name: Dimakis, Aristophanes
name: Muller-Hoissen, Folkert
Publisher: name: arXiv
Year: 1999
Subjects: subject: Mathematical Physics (math-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: The existence of an infinite set of conserved currents in completely integrable classical models, including chiral and Toda models as well as the KP and self-dual Yang-Mills equations, is traced back to a simple construction of an infinite chain of closed (respectively, covariantly constant) 1-forms in a (gauged) bi-differential calculus. The latter consists of a differential algebra on which two differential maps act. In a gauged bi-differential calculus these maps are extended to flat covariant derivatives.
description: 24 pages, 2 figures, uses amssymb.sty and diagrams.sty, substantial extensions of examples (relative to first version)
Additional file 18 of Breast and prostate cancers harbor common somatic copy number alterations that consistently differ by race and are associated with survival
Creators: name: Chen, Yalei
name: Sadasivan, Sudha M.
name: She, Ruicong
name: Datta, Indrani
name: Taneja, Kanika
name: Chitale, Dhananjay
name: Gupta, Nilesh
name: Davis, Melissa B.
name: Newman, Lisa A.
name: Rogers, Craig G.
name: Paris, Pamela L.
name: Li, Jia
name: Rybicki, Benjamin A.
name: Levin, Albert M.
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Biological Sciences not elsewhere classified
subject: Cancer
subject: Science Policy

description: Additional file 18: Figure S10. Pdf format. Breast cancer survival for each SCNA-defined breast cancer patient group (BRG) by race. A-C) Kaplan-Meier 10-year overall survival (OS) curves for each BRG, by race. D-F) Kaplan-Meier 10-year progression-free survival (PFS) curves for each BRG, by race.
Sources and sinks separating domains of left- and right-traveling waves: Experiment versus amplitude equations
Creators: name: Alvarez, Roberto
name: van Hecke, Martin
name: van Saarloos, Wim
Publisher: name: arXiv
Year: 1996
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: In many pattern forming systems that exhibit traveling waves, sources and sinks occur which separate patches of oppositely traveling waves. We show that simple qualitative features of their dynamics can be compared to predictions from coupled amplitude equations. In heated wire convection experiments, we find a discrepancy between the observed multiplicity of sources and theoretical predictions. The expression for the observed motion of sinks is incompatible with any amplitude equation description.
description: 4 pages, RevTeX, 3 figure
Schwarz reflections and anti-holomorphic correspondences
Creators: name: Lee, Seung-Yeop
name: Lyubich, Mikhail
name: Makarov, Nikolai G.
name: Mukherjee, Sabyasachi
Publisher: name: arXiv
Year: 2019
Subjects: subject: Dynamical Systems (math.DS)
subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 37F05, 37F10, 37F20, 37F30, 37F45, 30C10, 30C45, 30D05, 30D40

description: In this paper, we continue exploration of the dynamical and parameter planes of one-parameter families of Schwarz reflections that was initiated in \cite{LLMM1,LLMM2}. Namely, we consider a family of quadrature domains obtained by restricting the Chebyshev cubic polynomial to various univalent discs. Then we perform a quasiconformal surgery that turns these reflections to parabolic rational maps (which is the crucial technical ingredient of our theory). It induces a straightening map between the parameter plane of Schwarz reflections and the parabolic Tricorn. We describe various properties of this straightening highlighting the issues related to its anti-holomorphic nature. We complete the discussion by comparing our family with the classical Bullett-Penrose family of matings between groups and rational maps induced by holomorphic correspondences. More precisely, we show that the Schwarz reflections give rise to anti-holomorphic correspondences that are matings of parabolic anti-rational maps with the abstract modular group. We further illustrate our mating framework by studying the correspondence associated with the Schwarz reflection map of a deltoid.
description: Same as published version
Computation of conserved densities for systems of nonlinear differential-difference equations
Creators: name: Goktas, Unal
name: Hereman, Willy
name: Erdmann, Grant
Publisher: name: arXiv
Year: 1997
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: A new method for the computation of conserved densities of nonlinear differential-difference equations is applied to Toda lattices and discretizations of the Korteweg-de Vries and nonlinear Schrodinger equations. The algorithm, which can be implemented in computer algebra languages such as Mathematica, can be used as an indicator of integrability.
description: submitted to Phys. Lett A, 10 pages, latex
ESHITISHDA NUQSONI BO'LGAN BOLALARNI RUXIY RIVOJLANISH XUSUSIYATLARI
Creators: name: Toshpulova, Nodira
Publisher: name: Zenodo
Year: 2024

description: Bugungi maqolamizda  eshitishda nuqsoni bo’lgan bolalarni ruxiy rivojlanish xususiyatlari , eshitish qobiliyatini rivojlantirish, talaffuz qilish, nutq o’stirishlar o’qitish, «Ta'lim to’g’risida»gi qonun va «Kadrlar tayyorlash» Milliy dasturini hayotta tatbiq etish davlat siyosatining ustivor yo’nalishlari masalalari yoritib berilgan
The Ketza River Mine tailings impoundment operation, decommissioning and environmental issues
Creators: name: Harpley, David P.
name: Bryan, P. J.
name: Canamax Resources Inc.
Publisher: name: The University of British Columbia
Year: 2009

description: Canamax Resources Inc. operate the Ketza River Mine, a small gold mine in the Yukon Territory some 180 km north-east of Whitehorse. The mine has until now processed oxide ore only, depositing tailings in an impoundment created by the construction of two dams, and the diversion of existing watercourses around the facility. Gold recovery is by cyanidation. The resulting tailings pond water has significant concentrations of cyanide, copper and arsenic. Pond water cyanide concentrations are controlled by seasonal natural degradation and tailings treatment to destroy cyanide using the Inco SO2 - air process prior to discharge to the impoundment. Pond water is also treated to destroy cyanide using the Inco process, followed by discharge to the environment during a 6 month period per annum covering the duration of higher surface water run-offs. Seepage from the impoundment is collected and returned by strategically located sump and pump-back systems. Steffen, Robertson and Kirsten (B.C.) Inc. (SRK) was engaged by Canamax to investigate seepage from the tailings impoundment, and was subsequently retained to assist with operating and decommissioning issues related to the tailings impoundment and a proposal to mine and mill sulphide ores, pending regulatory approval. The proposed milling of sulphide ores raised a number of environmental issues regarding the tailings impoundment. Operating conditions could potentially yield higher contaminant concentrations in the tailings pond, which could have a concomitant effect on concentrations in seepage and water treatment plant effluent discharge. Further, decommissioning plans were needed to address the disposal and long-term storage of potentially acid generating tailings. This paper summarizes the investigations undertaken and predictions made in terms of the proposed milling of sulphide ores, the tailings impoundment and the receiving aquatic environment at the Ketza River Mine. The "sulphide" project at Ketza is considered an example of the sustainable development of a relatively small operation despite potentially adverse environmental circumstances, with development assisted by the assessment of specific environmental issues and the adoption of appropriate mitigative solutions.
High-speed phase-stable swept source optical coherence tomography: functional imaging and biomedical applications
Creators: Ling, Yuye
Publisher: name: Columbia University
Year: 2018
Subjects: Electrical engineering
Biomedical engineering
Optical coherence tomography
Lasers
Imaging systems in medicine

description: In the past decades, the performance of swept source optical coherence tomography (SS-OCT) has experienced an unprecedented improvement which is mainly driven by the rapidly evolving laser technologies: the state-of-art SS-OCT is now tens of dB more sensitive, six orders of magnitude faster, and seeing ten times deeper than the original version of time domain OCT. Regardless of the abovementioned progress, the phase instability is always considered the biggest weakness of SS-OCT and the mainstream belief often states that the mechanical tuning mechanism of the swept source is to blame.
               In my study, I first developed a high-speed phase-stable SS-OCT based on a new-generation akinetic laser source, which is electrically tuned in wavelength, in the hope of reducing the phase noise to a shot-noise limited level. The experimental results turned out to be contradicted to the conventional phase noise theory, which inspires my discovery of a completely new interpretation for the phase noise in SS-OCT: I proposed that the timing jitter and scanning variability has to be taken into the consideration in the noise model as multiplicative noises. The theory was later validated by another SS-OCT using a different light source. This study for the first time articulated the phase noise’s origin and composition in the SS-OCT.
      	Although the SS-OCT performs relatively worse in phase stability compared with its spectral-domain counterpart (SD-OCT), it is still valuable since it images at a much faster rate than SD-OCT. Therefore, a better temporal resolution could be achieved, which is particularly attractive in areas such as time lapse imaging. I therefore utilize the system along with other two systems to conduct ex vivo imaging on human tracheobronchial epithelium. It is shown that the SS-OCT system could achieve equally good performance in this task. Moreover, thanks to the higher temporal and temporal frequency resolution, finer structure within the frequency response of the ciliary motion is picked up by our system.
      	During the study of ex vivo ciliary imaging, one of the challenges I was confronted with was the enormous amount of data generated by the SS-OCT, especially when high temporal frequency resolution is required. We thus came up with an idea of applying the compressive sensing (CS) to reduce the data size. Currently, we have demonstrated some preliminary results with using CS on reference k-clock channel compression. In the future, we will apply the same theory to compress the sample channel data, especially or time lapse OCT imaging.
On the morphology of two-dimensional laminar vortex streets behind triangles
Creators: name: Kim, Ildoo
Publisher: name: arXiv
Year: 2019
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The two-dimensional laminar vortex streets behind a triangle have two morphologically distinct structures depending on the Reynolds number and the aspect ratio of the triangle. These two structures are the conventional structure and the separated rows structure, where the latter is characterized by a thin layer of irrotational fluid between two vortex rows. In this paper, by means of numerical simulation, we find that the separated rows structure occurs when the thickness of boundary layers is less than 25% of their separation distance. We also show from the linear stability analysis that the criterion is related to the coupling of two boundary layers in producing unstable modes.
description: 15 pages, 6 figures
Blog: ORCID in Atlanta: Our Second Consortia Workshop
Creators: name: Meadows, Alice
Publisher: name: ORCID
Year: 2019
Subjects: subject: Information Systems
subject: FOS: Computer and information sciences

description: On May 19 - 22, 45 ORCID consortia leads, Board members, and staff from 15 countries gathered for two days of activities, networking, and presentations. Read all about it in today’s post, which also includes links to the presentations and posters!
Way of life theory: the underlying structure of worldviews, social relations and lifestyles
Creators: name: Pepperday, Michael Edward
Publisher: name: The Australian National University
Year: 2009
Subjects: political culture, grid-group, worldviews, social relations, social structure, individualism, hierarchy, egalitarianism, fatalism

description: What is the structure of society? Many thinkers have pondered the regularities. Way of life theory (WOLT) shows the relationship of every rational, social issue to every other rational, social issue. ¶ From two dichotomised, theoretical dimensions called grid and group, Mary Douglas deduced four ways of life usually called individualism, hierarchy, egalitarianism, and fatalism. WOLT shows the same four ideal types may be deduced from any significant pair of social issues, including competition, cooperation, coercion, freedom, justice, self-identity, nature, human nature, and more. Since four types may be divided pair-wise in three ways, there are three, not two, dimensions or axes. ¶ WOLT also deduces Douglas’s fifth type (the hermit) and resolves the long-standing logical anomalies of grid-group theory. ¶ In all, seven social theorists have independently deduced four types from various dimension pairs. Mistakes aside, they find the same four theoretical types. Evidently, the four types are natural kinds. Between them these theorists use three axes. ¶ Numerous intuitive theorists from across social science have developed types without dimensions, and dimensions without types. Though incomplete, they show no significant disagreement. ¶ It appears that every issue that must be taken into account to live socially fits the three axes. There is no flexibility: each issue fits the axes one way. Geometrically, three dichot�omised dimensions yield eight types, however four of them are not viable and do not arise. Given just four valid points, the number of dimensions is necessarily limited to three. The axes generate thousands of predictions. ¶ ...
Non-monotonic population and coherence evolution in Markovian open-system dynamics
Creators: name: Haase, Jan F.
name: Smirne, Andrea
name: Huelga, Susana F.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider a simple microscopic model where the open-system dynamics of a qubit, despite being Markovian, shows features which are typically associated to the presence of memory effects. Namely, a non monotonic behavior both in the population and in the coherence evolution arises due to the presence of non-secular contributions, which break the phase covariance of the Lindbladian (semigroup) dynamics. We also show by an explicit construction how such a non-monotonic behaviour can be reproduced by a phase covariant evolution, but only at the price of inserting some state-dependent memory effects.
description: Submitted to the proceedings of the 684. WE-Heraeus-Seminar "Advances in open systems and fundamental tests of quantum mechanics"
Optical Solitary Waves in the Higher Order Nonlinear Schrodinger Equation
Creators: name: Gedalin, M.
name: Scott, T. C.
name: Band, Y. B.
Publisher: name: arXiv
Year: 1996
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We study solitary wave solutions of the higher order nonlinear Schrodinger equation for the propagation of short light pulses in an optical fiber. Using a scaling transformation we reduce the equation to a two-parameter canonical form. Solitary wave (1-soliton) solutions exist provided easily met inequality constraints on the parameters in the equation are satisfied. Conditions for the existence of N-soliton solutions (N>1) are determined; when these conditions are met the equation becomes the modified KdV equation. A proper subset of these conditions meet the Painleve plausibility conditions for integrability.
description: REVTeX, 4 pages, no figures. To appear in Phys. Rev. Lett
Women and Warung in an Urban Kampung
Creators: name: Indraswari
Publisher: name: The Australian National University
Year: 2006
Subjects: women, warung, informal sector, urban poverty

description: This thesis is a study of women, warung (small shops) and Cicadas kampung community of Bandung, West Java. Data on warung, women, and the Cicadas kampung is based on 12 months fieldwork in 2002. To collect the data, a combination of in-depth interviews, observation and participant observation were adopted. In this research I explore the warung issue from the perspective of warung owners and other members of the kampung. ¶ From the owners’ point of view the main reason to establish warung is to extend the limited income produced by their family members to make ends meet. Other reasons are the possibility to combine income earning activities with domestic chores and social prestige. Having a warung gives more social prestige to a woman warung owner than being a domestic helper. On the other hand, having a job in the formal sector is considered better than conducting a warung business. ¶ From the kampung residents’ point of view, the reasons to shop at warung are mainly related to certain services offered by warung which are not available in other trading sectors. Warung offer small quantities of goods and credit. These services match the socioeconomic condition of the people, who are mostly low income. For the poor, warung indeed ‘support’ them by providing these affordable services which are in accord with their purchasing power. Moreover shopping at warung enables the people to save, especially when buying cooked food. For kampung people, cooking may lead to a higher cost. Proximity is another reason people shop at warung - which could be as close as next door - and this saves them transportation costs. ¶ Warung are also a social centre where people interact and discuss community affairs. Buying snacks (jajan) and credit (nganjuk) are important practices which mark the relationship between warung owners and their customers. These practices are less likely to characterize other trading sectors. ¶ More women than men run warung because having a warung enables women to combine reproductive and productive work, though this leads to the women working extremely long hours - up to 16 hours a day - to perform both tasks. Warung can also be seen as an extension of women’s domestic responsibilities, by reinvesting money and providing meals for their family.
Mean Free Path and Energy Fluctuations in Quantum Chaotic Billiards
Creators: name: Louis, E.
name: Cuevas, E.
name: Verges, J. A.
name: Ortuno, M.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Chaotic Dynamics (nlin.CD)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The elastic mean free path of carriers in a recently introduced model of quantum chaotic billiards in two and three dimensions is calculated. The model incorporates surface roughness at a microscopic scale by randomly choosing the atomic levels at the surface sites between -W/2 and W/2. Surface roughness yields a mean free path l that decreases as L/W^2 as W increases, L being the linear size of the system. But this diminution ceases when the surface layer begins to decouple from the bulk for large enough values of W, leaving more or less unperturbed states on the bulk. Consequently, the mean free path shows a minimum of about L/2 for W of the order of the band width. Energy fluctuations reflect the behavior of the mean free path. At small energy scales, strong level correlations manifest themselves by small values of the number of levels variance Sigma^2(E) that are close to Random Matrix Theory (RMT) in all cases. At larger energy scales, fluctuations are below the logarithmic behavior of RMT for l > L, and above RMT value when l < L.
description: 8 twocolumn pages, seven figures, revtex and epsf macros. To be published in Physical Review B.