cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Weak Lensing Measurement of the Mass--Richness Relation of SDSS redMaPPer Clusters
Creators: name: Simet, Melanie
name: McClintock, Tom
name: Mandelbaum, Rachel
name: Rozo, Eduardo
name: Rykoff, Eli
name: Sheldon, Erin
name: Wechsler, Risa H.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We perform a measurement of the mass--richness relation of the redMaPPer galaxy cluster catalogue using weak lensing data from the Sloan Digital Sky Survey. We have carefully characterized a broad range of systematic uncertainties, including shear calibration errors, photo-$z$ biases, dilution by member galaxies, source obscuration, magnification bias, incorrect assumptions about cluster mass profiles, cluster centering, halo triaxiality, and projection effects. We also compare measurements of the lensing signal from two independently-produced shear and photometric redshift catalogues to characterize systematic errors in the lensing signal itself. Using a sample of 5,570 clusters from $0.1\le z\le 0.33$, the normalization of our power-law mass vs.\ $λ$ relation is $\log_{10}[M_{200m}/h^{-1}\ M_{\odot}]$ = $14.344 \pm 0.021$ (statistical) $\pm 0.023$ (systematic) at a richness $λ=40$, a 7 per cent calibration uncertainty, with a power-law index of $1.33^{+0.09}_{-0.10}$ ($1σ$). The detailed systematics characterization in this work renders it the definitive weak lensing mass calibration for SDSS redMaPPer clusters at this time.
description: 18 pages, 4 figures. Cosmological dependence updated from previous version
Bivariate Meta-Analysis of the Beta-Binomial Parameters versus Univariate Meta-Analysis of Cronbach's alpha/KR20 - Simulation R Code
Creators: name: Doebler, Philipp
name: Frick, Susanne
Publisher: name: OSF Registries
Year: 2023
Subjects: subject: Social and Behavioral Sciences

description: This registration contains the simulation R code for the journal submission (revision) of the associated manuscript in October 2023.
The sphere packing problem in dimension 8
Creators: name: Viazovska, Maryna
Publisher: name: arXiv
Year: 2016
Subjects: subject: Number Theory (math.NT)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics

description: In this paper we prove that no packing of unit balls in Euclidean space $\mathbb{R}^8$ has density greater than that of the $E_8$-lattice packing.
description: 22 pages, 2 figures
INDICADORES PREDITIVOS DO AUTOCUIDADO, PERSPETIVA DO ENFERMEIRO ESPECIALISTA EM ENFERMAGEM DE REABILITAÇÃO – REVISÃO SISTEMÁTICA DA LITERATURA
Creators: name: Saraiva, Daniel Filipe
name: Milho, David Manuel Caetano
name: Teixeira, Filipe Miguel Silva
name: Mesquita, Ana Cristina Nunes
name: Nunes, Diogo Filipe Martins
name: Ferreira, Dulce
Publisher: name: Open Science Framework
Year: 2023
Subjects: subject: Other Rehabilitation and Therapy
subject: Nervous System Diseases
subject: Other Nursing
subject: Nursing
subject: FOS: Health sciences
subject: Medical Sciences
subject: Medical Humanities
subject: Rehabilitation and Therapy
subject: Diseases
subject: Vocational Rehabilitation Counseling
subject: Medicine and Health Sciences
subject: Movement and Mind-Body Therapies
subject: Autocuidado
subject: Reabilitação
subject: Adulto
subject: Autogestão
subject: Indicadores
subject: Enfermagem

description: Revisão Sistemática da Literatura para identificar os indicadores preditivos do autocuidado e os métodos de avaliação da capacidade de autocuidado pelo Enfermeiro Especialista em Enfermagem de Reabilitação
Kardiales Monitoring mit Hilfe implantierbarer Systeme
Creators: name: Theres, Heinz Peter
Publisher: name: Humboldt-Universität zu Berlin, Medizinische Fakultät - Universitätsklinikum Charité
Year: 2001
Subjects: subject: Sensoren
subject: Kardiales Monitoring
subject: Koronare Herzerkrankung
subject: Frequenzadaptive Herzschrittmacher
subject: Sensors
subject: cardiac monitoring
subject: coronary artery disease
subject: rate adaptive pacing
subject: 610 Medizin
subject: 33 Medizin
subject: YB 8850

description: Mikroprozessorgesteuerte Implantate haben sich in zahlreichen Bereichen der Medizin etabliert. Physiologische, korpereigene Parameter werden erfasst, abgespeichert und konnen durch Telemetriesysteme weitergeleitet werden. Zusatzlich stehen Therapieoptionen zur Verfugung. Dazu zahlen Neurostimulatoren, welche im Bereich der Schmerztherapie und des fortgeschrittenen Morbus Parkinson erfolgreich angewendet werden ebenso wie Systeme zur Medikamentenapplikation. Beispielhaft hat sich die Entwicklung aktiver Implantate jedoch im Bereich der Herzschrittmacher- und Defibrillatortherapie vollzogen. Die vorliegende Arbeit beschaftigt sich mit der Erforschung physiologischer kardialer Parameter und ihrer Erfassung mit Hilfe von implantierbaren Sensoren. Dabei werden grundlegende technische Aspekte, die spezielle Sensorik zur Erfassung verschiedener Parameter und die Signalverarbeitung dargestellt. Es werden die bereits heute vielfaltigen Moglichkeiten implantierbarer kardialer Monitoringsysteme diskutiert. Neue Moglichkeiten wie das Monitoring ischamischer Ereignisse werden eroffnet.
description: Mikroprocessor controlled implantable systems are standard in many medical specialities. Physiological parameters can be recorded, stored and transfered via telemetry systems. In addition different therapeutic options are available: neurostimulation to treat patients with refractory pain and morbus parkinson, drug pumps for infusion of insulin etc.. Cardiac pacemakers and implantable cardioverter defibrillators were the driving force in the development of implantable sensors. We investigated different physiological cardiac parameters via implantable sensors. In this paper we discuss basic technical aspects, sensors, signal conditioning and signal analysis. The spectrum of available implantable sensors is shown. New options like the monitoring of transient myocardial ischemia are presented.
Supervised Learning with Quantum-Inspired Tensor Networks
Creators: name: Stoudenmire, E. Miles
name: Schwab, David J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Machine Learning (stat.ML)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Tensor networks are efficient representations of high-dimensional tensors which have been very successful for physics and mathematics applications. We demonstrate how algorithms for optimizing such networks can be adapted to supervised learning tasks by using matrix product states (tensor trains) to parameterize models for classifying images. For the MNIST data set we obtain less than 1% test set classification error. We discuss how the tensor network form imparts additional structure to the learned model and suggest a possible generative interpretation.
description: 11 pages, 15 figures; updated version includes corrections, links to sample codes, expanded discussion, and additional references
Linear lambda terms as invariants of rooted trivalent maps
Creators: name: Zeilberger, Noam
Publisher: name: arXiv
Year: 2015
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Combinatorics (math.CO)
subject: Category Theory (math.CT)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: The main aim of the article is to give a simple and conceptual account for the correspondence (originally described by Bodini, Gardy, and Jacquot) between $α$-equivalence classes of closed linear lambda terms and isomorphism classes of rooted trivalent maps on compact oriented surfaces without boundary, as an instance of a more general correspondence between linear lambda terms with a context of free variables and rooted trivalent maps with a boundary of free edges. We begin by recalling a familiar diagrammatic representation for linear lambda terms, while at the same time explaining how such diagrams may be read formally as a notation for endomorphisms of a reflexive object in a symmetric monoidal closed (bi)category. From there, the "easy" direction of the correspondence is a simple forgetful operation which erases annotations on the diagram of a linear lambda term to produce a rooted trivalent map. The other direction views linear lambda terms as complete invariants of their underlying rooted trivalent maps, reconstructing the missing information through a Tutte-style topological recurrence on maps with free edges. As an application in combinatorics, we use this analysis to enumerate bridgeless rooted trivalent maps as linear lambda terms containing no closed proper subterms, and conclude by giving a natural reformulation of the Four Color Theorem as a statement about typing in lambda calculus.
description: accepted author manuscript, posted six months after publication
Energy Scaling of Targeted Optimal Control of Complex Networks
Creators: name: Klickstein, Isaac S.
name: Shirin, Afroza
name: Sorrentino, Francesco
Publisher: name: arXiv
Year: 2016
Subjects: subject: Systems and Control (eess.SY)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Physical sciences

description: Recently it has been shown that the control energy required to control a dynamical complex network is prohibitively large when there are only a few control inputs. Most methods to reduce the control energy have focused on where, in the network, to place additional control inputs. Here, in contrast, we show that by controlling the states of a subset of the nodes of a network, rather than the state of every node, while holding the number of control signals constant, the required energy to control a portion of the network can be reduced substantially. The energy requirements exponentially decay with the number of target nodes, suggesting that large networks can be controlled by a relatively small number of inputs as long as the target set is appropriately sized. We validate our conclusions in model and real networks to arrive at an energy scaling law to better design control objectives regardless of system size, energy restrictions, state restrictions, input node choices and target node choices.
description: 7 figures, to appear in Nature Communications
On the number of Courant-sharp Dirichlet eigenvalues
Creators: name: Berg, Michiel van den
name: Gittins, Katie
Publisher: name: arXiv
Year: 2016
Subjects: subject: Spectral Theory (math.SP)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35P15, 35P20, 49R05, 49R05

description: We consider arbitrary open sets $Ω$ in Euclidean space with finite Lebesgue measure, and obtain upper bounds for (i) the largest Courant-sharp Dirichlet eigenvalue of $Ω$, (ii) the number of Courant-sharp Dirichlet eigenvalues of $Ω$. This extends recent results of P. Bérard and B. Helffer.
description: 10 pages, 2 figures
A Modified Gravity Theory: Null Aether
Creators: name: Gurses, Metin
name: Senturk, Cetin
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: General quantum gravity arguments predict that Lorentz symmetry might not hold exactly in nature. This has motivated much interest in Lorentz breaking gravity theories recently. Among such models are vector-tensor theories with preferred direction established at every point of spacetime by a fixed-norm vector field. The dynamical vector field defined in this way is referred to as the \textquotedblleft aether." In this paper, we put forward the idea of a \textit{null} aether field and introduce, for the first time, the Null Aether Theory (NAT)--a vector-tensor theory. We first study the Newtonian limit of this theory and then construct exact spherically symmetric black hole solutions in the theory in four dimensions, which contain Vaidya-type non-static solutions and static Schwarzschild-(A)dS type solutions, Reissner-Nordström-(A)dS type solutions and solutions of conformal gravity as special cases. Afterwards, we study the cosmological solutions in NAT: We find some exact solutions with perfect fluid distribution for spatially flat FLRW metric and null aether propagating along the $x$ direction. We observe that there are solutions in which the universe has big-bang singularity and null field diminishes asymptotically. We also study exact gravitational wave solutions--AdS-plane waves and $pp$-waves--in this theory in any dimension $D\geq3$. Assuming the Kerr-Schild-Kundt class of metrics for such solutions, we show that the full field equations of the theory are reduced to two, in general coupled, differential equations when the background metric assumes the maximally symmetric form. The main conclusion of these computations is that the spin-0 aether field acquires a \textquotedblleft mass" determined by the cosmological constant of the background spacetime and the Lagrange multiplier given in the theory.
description: 32 pages, no figures, matches the published version
Weighted restriction estimates using polynomial partitioning
Creators: name: Shayya, Bassam
Publisher: name: arXiv
Year: 2015
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 42B10, 42B20 (Primary), 28A75 (Secondary)

description: We use the polynomial partitioning method of Guth to prove weighted Fourier restriction estimates in $\Bbb R^3$ with exponents $p$ that range between $3$ and $3.25$, depending on the weight. As a corollary to our main theorem, we obtain new (non-weighted) local and global restriction estimates for compact $C^\infty$ surfaces $S \subset \Bbb R^3$ with strictly positive second fundamental form. For example, we establish the global restriction estimate $\| Ef \|_{L^p(\Bbb R^3)} \leq C \, \| f \|_{L^q(S)}$ in the full conjectured range of exponents for $p > 3.25$ (up to the sharp line), and the global restriction estimate $\| Ef \|_{L^p(Ω)} \leq C \, \| f \|_{L^2(S)}$ for $p>3$ and certain sets $Ω\subset \Bbb R^3$ of infinite Lebesgue measure. As a corollary to our main theorem, we also obtain new results on the decay of spherical means of Fourier transforms of positive compactly supported measures on $\Bbb R^3$ with finite $α$-dimensional energies.
description: 55 pages. Revised following the suggestions of the referee. Accepted for publication in Proceedings of the London Mathematical Society
Supersymmetric solutions of $N=(2,0)$ Topologically Massive Supergravity
Creators: name: Deger, Nihat Sadik
name: Moutsopoulos, George
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We first make a Killing spinor analysis for a general three-dimensional off-shell $N=(2,0)$ supergravity and find conditions for a bosonic background to preserve some supersymmetry . We then consider a particular model, namely $N=(2,0)$ topologically massive supergravity and impose its field equations. By making a suitable ansatz on metric functions we find a large class of solutions that include spacelike, timelike and null warped $AdS_3$ among others. Isometric quotients of spacelike and timelike squashed $AdS_3$ solutions yield extremal black holes without closed causal curves.
description: 36 pages, minor changes, to appear in CQG
Two integrable classes of Emden-Fowler equations with applications in astrophysics and cosmology
Creators: name: Mancas, S. C.
name: Rosu, H. C.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We show that some Emden-Fowler (EF) equations encountered in astrophysics and cosmology belong to two EF integrable classes of the type d^2z/dχ^2=A χ^{-λ-2}z^n for λ=(n-1)/2 (class one), and λ=n+1 (class two). We find their corresponding invariants which reduce them to first order nonlinear ordinary differential equations. Using particular solutions of such EF equations, the two classes are set in the autonomous nonlinear oscillator form d^2ν/dt^2 +ad ν/dt +b(ν-ν^n)=0, where the coefficients a,b depend only on λ, n. For both classes, we write closed-form solutions in parametric form. The illustrative examples from astrophysics and general relativity correspond to two n=2 cases from class one and two, and one n=5 case from class one, all of them yielding Weierstrass elliptic solutions. It is also noticed that when n=2, EF equations can be studied using the Painlevé reduction method, since they are a particular case of equations of the type d^2z/dχ^2=F(χ)z^2, where F(χ) is the Kustaanheimo-Qvist function
description: 10 pages, no figures, final version
Oscillatory Attractors: A New Cosmological Phase
Creators: name: Bains, Jasdeep S.
name: Hertzberg, Mark P.
name: Wilczek, Frank
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In expanding FRW spacetimes, it is usually the case that homogeneous scalar fields redshift and their amplitudes approach limiting values: Hubble friction usually ensures that the field relaxes to its minimum energy configuration, which is usually a static configuration. Here we discover a class of relativistic scalar field models in which the attractor behavior is the field oscillating indefinitely, with finite amplitude, in an expanding FRW spacetime, despite the presence of Hubble friction. This is an example of spontaneous breaking of time translation symmetry. We find that the effective equation of state of the field has average value $\langle w\rangle=-1$, implying that the field itself could drive an inflationary or dark energy dominated phase. This behavior is reminiscent of ghost condensate models, but in the new models, unlike in the ghost condensate models, the energy-momentum tensor is time dependent, so that these new models embody a more definitive breaking of time translation symmetry. We explore (quantum) fluctuations around the homogeneous background solution, and find that low $k$-modes can be stable, while high $k$-modes are typically unstable. We discuss possible interpretations and implications of that instability.
description: 36 pages, 15 figures. V2: Updated to version published in JCAP
Diseño del modelo de secretaría de comunicaciones de la alcaldía mayor de Cartagena de indias D.T.Y C.
Creators: name: Castillo Camaño, Wendy
name: Cañas Cuesta, Luz Evelis
name: Meléndez Miranda, María José
name: Pérez Lecompte, Mónica
name: Castillo Camaño, Wendy
name: Cañas Cuesta, Luz Evelis
name: Meléndez Miranda, María José
name: Pérez Lecompte, Mónica
Publisher: name: Universidad de Cartagena
Year: 2016
Subjects: Comunicación - Aspectos sociales - Investigaciones
Comunicación

description: Tesis (Comunicador Social) -- Universidad de Cartagena. Facultad de Ciencias Sociales y Educación. Programa de Trabajo Social, 2016
description: Esta propuesta tiene como finalidad presentar los resultados, conclusiones y recomendaciones brindadas por el grupo de estudiantes, de un estudio que permite mostrar la ausencia y la importancia de diseñar un modelo de Secretaría de Comunicaciones en la Alcaldía Mayor de la ciudad de Cartagena de Indias D. T y C, proponiendo así, un modelo para la integración de un nuevo ente administrativo dentro de la entidad.
Polar symplectic representations
Creators: name: Geatti, Laura
name: Gorodski, Claudio
Publisher: name: arXiv
Year: 2016
Subjects: subject: Representation Theory (math.RT)
subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics
subject: 20G05, 15A72, 53D20

description: We study polar representations in the sense of Dadok and Kac which are symplectic. We show that such representations are coisotropic and use this fact to give a classification. We also study their moment maps and prove that they separate closed orbits. Our work can also be seen as a specialization of some of the results of Knop on multiplicity free symplectic representations to the polar case.
description: 19 pages
Exploración "in silico" del proceso inhibitorio de la ß-Secretasa por hidroxietilaminas: Una aproximación geométrica y energética en el tiempo
Creators: name: Gueto Tettay, Carlos Alberto
Publisher: name: Universidad de Cartagena
Year: 2017
Subjects: Biotecnología
Inhibidores de enzima - Ensayo
Inhibidores de enzima
Inhibidores de enzima - Métodos de simulación
Enzimas - Métodos de simulación
Enzimas - Hidrogenólisis - Métodos de simulación

description: Tesis (Doctor en Ciencias). -- Universidad de Cartagena. Facultad de Ciencias Exactas y Naturales, 2017
description: Dentro de esta investigación, se busca explorar el mecanismo inhibitorio de la b-secretasa por parte de los hidroxietilaminos empleando técnicas de modelado molecular asistido por computadoras
Emergence of Robustness in Network of Networks
Creators: name: Roth, Kevin
name: Morone, Flaviano
name: Min, Byungjoon
name: Makse, Hernán A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: A model of interdependent networks of networks (NoN) has been introduced recently in the context of brain activation to identify the neural collective influencers in the brain NoN. Here we develop a new approach to derive an exact expression for the random percolation transition in Erdös-Rényi NoN. Analytical calculations are in excellent agreement with numerical simulations and highlight the robustness of the NoN against random node failures. Interestingly, the phase diagram of the model unveils particular patterns of interconnectivity for which the NoN is most vulnerable. Our results help to understand the emergence of robustness in such interdependent architectures.
description: 5 pages, 2 figures
Parametric representation of univalent functions with boundary regular fixed points
Creators: name: Gumenyuk, Pavel
Publisher: name: arXiv
Year: 2016
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 30C35, 30C75 (Primary), 30D05, 30C80, 34K35, 37C25, 22E99 (Secondary)

description: Given a set $\mathfrak S$ of conformal maps of the unit disk $\mathbb D$ into itself that is closed under composition, we address the question whether $\mathfrak S$ can be represented as the reachable set of a Loewner - Kufarev - type ODE $\mathrm{d}w_t/\mathrm{d}t=G_t\circ w_t$, $w_0=\mathsf{id}_{\mathbb D}$, where the control functions $t\mapsto G_t$ form a convex cone $\mathcal M_{\mathfrak S}$. For the set of all conformal $φ:\mathbb D\to\mathbb D$ with $φ(0)=0$, $φ'(0)>0$, an affirmative answer to this question is the essence of Loewner's well-known Parametric Representation of univalent functions [Math. Ann. 89 (1923), 103-121]. In this paper, we study classes of conformal self-maps defined by their boundary regular fixed points and, in part of the cases, establish their Loewner-type representability.
description: Version 3: Introduction has been modified; Example 3.1 added + other minor corrections
On exceptional collections of line bundles and mirror symmetry for toric Del-Pezzo surfaces
Creators: name: Jerby, Yochay
Publisher: name: arXiv
Year: 2016
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: Let $X$ be a toric Del-Pezzo surface and let $Crit(W) \subset (\mathbb{C}^{\ast})^n$ be the solution scheme of the Landau-Ginzburg system of equations. Denote by $X^{\circ}$ the polar variety of $X$. Our aim in this work is to describe a map $L : Crit(W) \rightarrow Fuk_{trop}(X^{\circ})$ whose image under homological mirror symmetry corresponds to a full strongly exceptional collection of line bundles.
description: Published in Journal of Mathematical Physics 2017 (Vol.58, Issue 3)
Symmetric exclusion processes on a ring with moving defects
Creators: name: Chatterjee, Rakesh
name: Chatterjee, Sakuntala
name: Pradhan, Punyabrata
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study symmetric simple exclusion processes (SSEP) on a ring in the presence of uniformly moving multiple defects or disorders - a generalization of the model proposed earlier [Phys. Rev. E 89, 022138 (2014)]. The defects move with uniform velocity and change the particle hopping rates locally. We explore the collective effects of the defects on the spatial structure and transport properties of the system. We also introduce an SSEP with ordered sequential (sitewise) update and elucidate the close connection with our model.
description: 17 pages, 13 figures
Apropiación de dramas coreanos en un grupo de jóvenes de Cartagena de indias.
Creators: name: Zarco Quintero, Liz Andrea
Publisher: name: Universidad de Cartagena
Year: 2017
Subjects: Identidad cultural
Cultura - Aspectos sociales

description: Tesis (Comunicadora Social) -- Universidad de Cartagena. Facultad de Ciencias Sociales y Educación. Programa de Educación Social, 2017
description: Dadas las condiciones actuales de hiper-conectividad en la que se configura la sociedad de la información del siglo XXI. Se pretende validar la hipótesis de que el consumo prolongado de dramas coreanos por parte un grupo de jóvenes de Cartagena de Indias, Colombia hace que la percepción hacia elementos de la cultura de ese país tenga una tendencia a ser favorable, en la medida en que estos son más propensos a ser aceptados, asimilados y apropiados en los códigos culturales de los receptores.
Works of Art in Italy. Losses and Survival in the War, London 1945 compiled from War Office Reports of the British Committee on the Preservation and Restitution of Works of Art, Archives and Other Material in Enemy Hands
Creators: name: Banfi, Anna; Bordignon, Giulia; Centanni, Monica
Publisher: name: La Rivista di Engramma
Year: 2008
Subjects: WWII
Monuments
Restoration

description: Presentation of the volume “Works of Art in Italy. Losses and Survival in the War“ published in London in 1945. “Works of Art in Italy“ is a detailed compilation of the state of Italian cities, monuments, churches, libraries and works of art at the end of World War II. The document, commissioned by British Prime Minister Winston Churchill, is drawn up by an English military commission (British Committee on the Preservation and Restitution of Works of Art, Archives and Other Material in Enemy Hands) whose precise task is to assess the damage caused. to the Italian cultural heritage during the war years. This is an editorial initiative that is part of the work of the Allied Commission for Monuments, Fine Arts and Archives (MFAA), a commission created by the American and British governments in the spring of 1943, shortly before the Allied landing in Sicily, to the protection of works of art and archives in Europe at war.
Diseño de una campaña de reciclaje desde la fuente y aprovechamiento de los residuos sólidos en el barrio Villas de Aranjuez de Cartagena.
Creators: name: Ballestas Elles, Luisa
name: Blanco Elles, Reilly
name: Gil Meza, Fabián Andrés
Publisher: name: Universidad de Cartagena
Year: 2016
Subjects: Aprovechamiento de residuos
Reciclaje - Investigaciones
Reciclaje
Rellenos sanitarios
Tecnología de reciclaje

description: Tesis (Comunicador(a) Social) -- Universidad de Cartagena. Facultad de Ciencias Sociales y Educación. Programa de Comunicación Social, 2016
description: El proyecto se desarrolló con una metodología mixta, es decir con características del método cualitativo y cuantitativo, el diagnóstico en general fue posible gracias a la triangulación de los resultados de los instrumentos usados (Encuesta, Entrevista, Observación). El resultado del proyecto es en general el diseño de una campaña de concientización usando los medios de comunicación para promover la cultura del reciclaje y el aprovechamiento de los residuos sólidos desde la fuente, en el barrio Villas de Aranjuez, en Cartagena.
Are Narcissists More Attracted to People in Relationships?
Creators: name: Okdie, Bradley
name: Brunell, Amy
Publisher: name: Open Science Framework
Year: 2022

description: This site provides supplemental materials for the paper entitled, "Are Narcissists More Attracted to People in Relationships?" The authors confirm that there is sufficient information for an independent researcher to reproduce all of the reported analyses. By signing below, authors affirm that the above information is accurate and complete, that any third-party material has been reproduced or otherwise made available only with the permission of the original author or copyright holder, and that publicly posted data do not contain information that would allow individuals to be identified without consent. Included on this Open Science Framework page are the data used for our manuscript. Using the data files, others could recreate the analyses from the manuscript. If someone wanted to reproduce the study, this Open Science Framework page contains the data to be able to do so. In the manuscript there is a URL directing readers to this page if they would like to do either of the above. Authors Signatures: Amy B. Brunell, Joshua Robinson, Nick P. Deems, & Bradley M. Okdie
Critical points of the anyon-Hubbard model
Creators: name: Arcila-Forero, J.
name: Franco, R.
name: Silva-Valencia, J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Anyons are particles with fractional statistics that exhibit a nontrivial change in the wavefunction under an exchange of particles. Anyons can be considered to be a general category of particles that interpolate between fermions and bosons. We determined the position of the critical points of the one-dimensional anyon-Hubbard model, which was mapped to a modified Bose-Hubbard model where the tunneling depends on the local density and the interchange angle. We studied the latter model by using the density matrix renormalization group method and observed that gapped (Mott insulator) and gapless (superfluid) phases characterized the phase diagram, regardless of the value of the statistical angle. The phase diagram for higher densities was calculated and showed that the Mott lobes increase (decrease) as a function of the statistical angle (global density). The position of the critical point separating the gapped and gapless phases was found using quantum information tools, namely the block von Neumann entropy. We also studied the evolution of the critical point with the global density and the statistical angle and showed that the anyon-Hubbard model with a statistical angle $θ=π/4$ is in the same universality class as the Bose-Hubbard model with two body interactions.
description: 9 pages, 8 figures. Comments are welcome
Positive and negative effects of social impact on evolutionary vaccination game in networks
Creators: name: Ichinose, Genki
name: Kurisaku, Takehiro
Publisher: name: arXiv
Year: 2016
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences
subject: 91A22

description: Preventing infectious disease like flu from spreading to large communities is one of the most important issues for humans. One effective strategy is voluntary vaccination, however, there is always the temptation for people refusing to be vaccinated because once herd immunity is achieved, infection risk is greatly reduced. In this paper, we study the effect of social impact on the vaccination behavior resulting in preventing infectious disease in networks. The evolutionary simulation results show that the social impact has both positive and negative effects on the vaccination behavior. Especially, in heterogeneous networks, if the vaccination cost is low, the behavior is more promoted than the case without social impact. In contrast, if the cost is high, the behavior is reduced compared to the case without social impact. Moreover, the vaccination behavior is effective in heterogeneous networks more than in homogeneous networks. This implies that the social impact puts people at risk in homogeneous networks. We also evaluate the results from the social cost related to the vaccination policy.
description: 7 pages, 4 figures
SHARP: a distributed, GPU-based ptychographic solver
Creators: name: Marchesini, Stefano
name: Krishnan, Hari
name: Daurer, Benedikt J.
name: Shapiro, David A.
name: Perciano, Talita
name: Sethian, James A.
name: Maia, Filipe R. N. C.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Optimization and Control (math.OC)
subject: Optics (physics.optics)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Ever brighter light sources, fast parallel detectors, and advances in phase retrieval methods, have made ptychography a practical and popular imaging technique. Compared to previous techniques, ptychography provides superior robustness and resolution at the expense of more advanced and time consuming data analysis. By taking advantage of massively parallel architectures, high-throughput processing can expedite this analysis and provide microscopists with immediate feedback. These advances allow real-time imaging at wavelength limited resolution, coupled with a large field of view. Here, we introduce a set of algorithmic and computational methodologies used at the Advanced Light Source, and DOE light sources packaged as a CUDA based software environment named SHARP (http://camera.lbl.gov/sharp), aimed at providing state-of-the-art high-throughput ptychography reconstructions for the coming era of diffraction limited light sources.
description: 8 pages, 5 figures
Large-scale dynamics of magnetic helicity
Creators: name: Linkmann, Moritz
name: Dallas, Vassilios
Publisher: name: arXiv
Year: 2016
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: In this paper we investigate the dynamics of magnetic helicity in magnetohydrodynamic (MHD) turbulent flows focusing at scales larger than the forcing scale. Our results show a nonlocal inverse cascade of magnetic helicity, which occurs directly from the forcing scale into the largest scales of the magnetic field. We also observe that no magnetic helicity and no energy is transferred to an intermediate range of scales sufficiently smaller than the container size and larger than the forcing scale. Thus, the statistical properties of this range of scales, which increases with scale separation, is shown to be described to a large extent by the zero flux solutions of the absolute statistical equilibrium theory exhibited by the truncated ideal MHD equations.
description: 6 pages, 5 figures, postprint version
Photoschaltbare Katalysatoren
Creators: name: Peters, Maike Vivian
Publisher: name: Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I
Year: 2008
Subjects: subject: Photoschalter
subject: Azobenzol
subject: Katalysatoren
subject: Porphyrin
subject: catalysis
subject: azobenzene
subject: porphyrine
subject: photoswitches
subject: 540 Chemie
subject: 30 Chemie

description: Ziel dieser Arbeit war die Kontrolle über bestimmte Eigenschaften von Molekülen. Dabei lag ein besonderes Interesse auf der Steuerung der Zugänglichkeit eines katalytisch aktiven Zentrums durch die großen geometrischen Veränderungen bei der E->Z Isomerie von photochromen Verbindungen. Ein weiterer Vorteil dieser photochromen Verbindungen liegt in der Reversibilität der E-Z Isomerisierung, so dass das katalytische Zentrum mehrmals „an“ und „aus“ geschaltet werden kann. In der Literatur sind nur sehr wenige Beispiele solcher photoschaltbaren Katalysatoren bekannt. Diese besitzen teilweise schwerwiegende Nachteile, wie z.B. geringe Reaktivitätsunterschiede oder eine begrenzte Anwendbarkeit, aufweisen. Die Aufgabe in dieser Arbeit bestand in der Entwicklung eines neuen photoschaltbaren Katalysatorsystems, welches sich durch größere Reaktivitätsunterschiede und eine breitere Anwendbarkeit auszeichnet. Das erste Design bestand aus einem photoschaltbaren Metalloporphyrin als Katalysator für Polymerisations- oder Oxidationsreaktionen. Nach erfolgreicher Synthese wurden die Schalteigenschaften untersucht. In einem zweiten Design wurde ein photoschaltbarer Organokatalysator hergestellt und dessen Schaltverhalten, sowie dessen Eignung als Katalysator in einer generellen Basenkatalyse, erfolgreich getestet.
description: The aim of this work was to control the properties of molecules. Our special interest lies in controlling the accessibility of a catalytic active center by using the big geometric changes of photochromic groups, such as E->Z isomerization of azobenzene or stilben. Another advantage of these photochromes is the reversibility of the Z -> E isomerization, so that the catalytic active center can be switched several times. Only few examples of photoswitchable catalysts are known in literature, having several disadvantages like small activity ratios or narrow scope. The goal of this work was to design a new photoswitchable catalyst having bigger activity ratios and broader applicability. The first design consisted of a photoswitchable metalloporphyrin as catalyst for polymerization or oxidation reactions. After successful synthesis the switching properties were investigated, showing no isomerization possibility. In a second approach a photoswitchable organo catalyst was established. The switching properties were investigated and the catalyst was successfully tested in general base catalysis.
Constructing Landau framework for topological order: Quantum chains and ladders
Creators: name: Chitov, Gennady Y.
name: Pandey, Toplal
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We studied quantum phase transitions in the antiferromagnetic dimerized spin-1/2 XY chain andvtwo-leg ladders. From analysis of several spin models we present our main result: the framework to deal with topological orders and hidden symmetries within the Landau paradigm. After mapping of the spin Hamiltonians onto the tight-binding models with Dirac or Majorana fermions and, when necessary, the mean-field approximation, the analysis can be done analytically. By utilizing duality transformations the calculation of nonlocal string order parameters is mapped onto the local order problem in some dual representation and done without further approximations. Calculated phase diagrams, phase boundaries, order parameters and their symmetries for each of the phases provide a comprehensive quantitative Landau description of the quantum critical properties of the models considered. Complementarily, the phases with hidden orders can also be distinguished by the Pontryagin (winding) numbers which we have calculated as well. This unified framework can be straightforwardly applied for various spin chains and ladders, topological insulators and superconductors. Applications to other systems are under way.
description: 13 pages, 5 figures. Final version with few references and comments added
Dynamics of Transformation from Segregation to Mixed Wealth Cities
Creators: name: Sahasranaman, Anand
name: Jensen, Henrik Jeldtoft
Publisher: name: arXiv
Year: 2016
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: We model the dynamics of the Schelling model for agents described simply by a continuously distributed variable - wealth. Agents move to neighborhoods where their wealth is not lesser than that of some proportion of their neighbors, the threshold level. As in the case of the classic Schelling model where segregation obtains between two races, we find here that wealth-based segregation occurs and persists. However, introducing uncertainty into the decision to move - that is, with some probability, if agents are allowed to move even though the threshold level condition is contravened - we find that even for small proportions of such disallowed moves, the dynamics no longer yield segregation but instead sharply transition into a persistent mixed wealth distribution. We investigate the nature of this sharp transformation between segregated and mixed states, and find that it is because of a non-linear relationship between allowed moves and disallowed moves. For small increases in disallowed moves, there is a rapid corresponding increase in allowed moves, but this tapers off as the fraction of disallowed moves increase further and finally settles at a stable value, remaining invariant to any further increase in disallowed moves. It is the overall effect of the dynamics in the initial region (with small numbers of disallowed moves) that shifts the system away from a state of segregation rapidly to a mixed wealth state. The contravention of the tolerance condition could be interpreted as public policy interventions like minimal levels of social housing or housing benefit transfers to poorer households. Our finding therefore suggests that it might require only very limited levels of such public intervention - just sufficient to enable a small fraction of disallowed moves, because the dynamics generated by such moves could spur the transformation from a segregated to mixed equilibrium.
description: 12 pages, 7 figures
La pizarra, revista impresa para fortalecer la propuesta curricular de la institución educativa madre Gabriela de San Martín
Creators: name: Meza Altamar, Mónica
name: Sulbarán Victor, Kenis
name: Tolosa Hernández, Yerlenis
Publisher: name: Universidad de Cartagena
Year: 2012
Subjects: Integración social
Camino para entrar en la sociedad
reflexión
Recursos humanos - Fuentes

description: Tesis (Comunicador Social) -- Universidad de Cartagena. Facultad de Ciencia Sociales y Educación. Programa de Comunicación Social, 2012
description: La comunicación debe ser vista como un camino para entrar en la sociedad y contribuir a su integración y desarrollo, de tal manera que el mundo sea una representación de cada uno de los sujetos que actúan en ella. Por esta razón, la comunicación resulta aplicable en todos los campos sociales y por ende, está estrechamente relacionada con la educación. Comunicación y educación establecen un vínculo que favorece la libre expresión de los estudiantes, el proceso enseñanza-aprendizaje, posibilita las respuestas a los problemas que éstos enfrentan en su contexto, provoca la reflexión y propicia la participación del estudiante como sujeto activo en su entorno socio-académico. En el presente proyecto se desarrollan y entrelazan los conceptos de comunicación, educación y sociedad, para contribuir a mejorar la formación pedagógica de niños, niñas y adolescentes, que se educan en medio de una zona vulnerable. Así, nace la propuesta de implementar un medio de comunicación impreso, como una novedosa herramienta académica, que busca mejorar el rendimiento lecto-escritural de los estudiantes de la Institución Educativa Madre Gabriela de San Martín, al tiempo que les permite reflejar, criticar y proponer soluciones a las problemáticas que los afectan. En este sentido, para satisfacer las necesidades y expectativas de su comunidad, se realizó una investigación de tipo descriptivo y cuantitativo, que permitió determinar la población y muestra, fuentes y metodología de trabajo, para recolectar y analizar la información que conllevó a la posterior creación de La Pizarra, como propuesta de solución. Desde dicha revista se fortalece la estrategia de la transversalidad del lenguaje para la producción e interpretación textual, lo cual se evidencia en la publicación de los textos interdisciplinarios con diversas tipologías elaborados por los estudiantes. La implementación de dicho medio abre campo a una importante posibilidad de aprendizaje que está acorde con las necesidades y exigencias actuales de la educación, y puede ser replicada en cualquier otra institución de la ciudad, de la región e incluso del país, puesto que permite reforzar habilidades comunicativas como el fomento del hábito de la lectura y la producción e interpretación textual, al tiempo que se consolidan las relaciones entre estudiantes, docentes y directivos, como sujetos activos y generadores de cambio en la sociedad.
Entangled Bloch Spheres: Bloch Matrix and Two Qubit State Space
Creators: name: Gamel, Omar
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We represent a two-qubit density matrix in the basis of Pauli matrix tensor products, with the coefficients constituting a Bloch matrix, analogous to the single qubit Bloch vector. We find the quantum state positivity requirements on the Bloch matrix components, leading to three important inequalities, allowing us to parametrize and visualize the two-qubit state space. Applying the singular value decomposition naturally separates the degrees of freedom to local and nonlocal, and simplifies the positivity inequalities. It also allows us to geometrically represent a state as two entangled Bloch spheres with superimposed correlation axes. It is shown that unitary transformations, local or nonlocal, have simple interpretations as axis rotations or mixing of certain degrees of freedom. The nonlocal unitary invariants of the state are then derived in terms of local unitary invariants. The positive partial transpose criterion for entanglement is generalized, and interpreted as a reflection, or a change of a single sign. The formalism is used to characterize maximally entangled states, and generalize two qubit isotropic and Werner states.
description: 20 pages, 5 figures
Time-optimal Coordination of Mobile Robots along Specified Paths
Creators: name: Altché, Florent
name: Qian, Xiangjun
name: de La Fortelle, Arnaud
Publisher: name: arXiv
Year: 2016
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: In this paper, we address the problem of time-optimal coordination of mobile robots under kinodynamic constraints along specified paths. We propose a novel approach based on time discretization that leads to a mixed-integer linear programming (MILP) formulation. This problem can be solved using general-purpose MILP solvers in a reasonable time, resulting in a resolution-optimal solution. Moreover, unlike previous work found in the literature, our formulation allows an exact linear modeling (up to the discretization resolution) of second-order dynamic constraints. Extensive simulations are performed to demonstrate the effectiveness of our approach.
description: Published in 2016 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS)