cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Kernel-Based Models for Influence Maximization on Graphs based on Gaussian Process Variance Minimization
Creators: name: Cuomo, Salvatore
name: Erb, Wolfgang
name: Santin, Gabriele
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Numerical Analysis (math.NA)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: The inference of novel knowledge, the discovery of hidden patterns, and the uncovering of insights from large amounts of data from a multitude of sources make Data Science (DS) to an art rather than just a mere scientific discipline. The study and design of mathematical models able to analyze information represents a central research topic in DS. In this work, we introduce and investigate a novel model for influence maximization (IM) on graphs using ideas from kernel-based approximation, Gaussian process regression, and the minimization of a corresponding variance term. Data-driven approaches can be applied to determine proper kernels for this IM model and machine learning methodologies are adopted to tune the model parameters. Compared to stochastic models in this field that rely on costly Monte-Carlo simulations, our model allows for a simple and cost-efficient update strategy to compute optimal influencing nodes on a graph. In several numerical experiments, we show the properties and benefits of this new model.
SBML for optimizing decision support's tools
Creators: name: Hamami, Dalila
name: Atmani, Baghdad
Publisher: name: arXiv
Year: 2013
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Computer and information sciences

description: Many theoretical works and tools on epidemiological field reflect the emphasis on decision-making Tools by both public health and the scientific community, which continues to increase. Indeed, in the epidemiological field, modeling tools are proving a very important way in helping to make decision. However, the variety, the large volume of data and the nature of epidemics lead us to seek solutions to alleviate the heavy burden imposed on both experts and developers. In this paper, we present a new approach: the passage of an epidemic model realized in Bio-PEPA to a narrative language using the basics of SBML language. Our goal is to allow on one hand, epidemiologists to verify and validate the model, and the other hand, developers to optimize the model in order to achieve a better model of decision making. We also present some preliminary results and some suggestions to improve the simulated model.
When Being Soft Makes You Tough: A Collision-Resilient Quadcopter Inspired by Arthropods' Exoskeletons
Creators: name: de Azambuja, Ricardo
name: Fouad, Hassan
name: Bouteiller, Yann
name: Sol, Charles
name: Beltrame, Giovanni
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Flying robots are usually rather delicate and require protective enclosures when facing the risk of collision, while high complexity and reduced payload are recurrent problems with collision-resilient flying robots. Inspired by arthropods' exoskeletons, we design a simple, open source, easily manufactured, semi-rigid structure with soft joints that can withstand high-velocity impacts. With an exoskeleton, the protective shell becomes part of the main robot structure, thereby minimizing its loss in payload capacity. Our design is simple to build and customize using cheap components (e.g. bamboo skewers) and consumer-grade 3D printers. The result is CogniFly, a sub-250g autonomous quadcopter that survives multiple collisions at speeds up to 7m/s. In addition to its collision-resiliency, CogniFly is easy to program using Python or Buzz, carries sensors that allow it to fly for approx. 17min without the need of GPS or an external motion capture system, has enough computing power to run deep neural network models on-board and was designed to facilitate integration with an automated battery swapping system. This structure becomes an ideal platform for high-risk activities (such as flying in a cluttered environment or reinforcement learning training) by dramatically reducing the risks of damaging its own hardware or the environment. Source code, 3D files, instructions and videos are available through the project's website (https://thecognifly.github.io).
description: Author's version of the paper presented at ICRA 2022 (still waiting for the conference proceedings to be online). Added acknowledgements that were previously removed to fit 6+n ICRA 2022 page limits
Vergessene Täuschungsbauwerke des Zweiten Weltkrieges – die Krupp´sche Nachtscheinanlage in Velbert
Creators: name: Grau, Helmut
name: Lohbeck, Jürgen
name: Niedworok, Josef Johannes
name: Polkläser, Sven
Publisher: name: Archäologie im Rheinland
Year: 2022

description: Archäologie im Rheinland, 2013(2014)
Safe Drinking Water in Kuna Yala: Field Notes from Panama
Creators: name: Halperin, Michael
Publisher: name: Columbia University
Year: 2009
Subjects: Cuna Indians
Drinking water
Water-supply, Rural--Health aspects
Water-supply, Rural--Citizen participation
Water--Purification
Sustainability
Water resources development--Management

description: Starting in early 2003, Michael Halperin worked for two years as a Peace Corps volunteer in the indigenous Kuna island community of Ustupu, just off the Northeastern coast of Panama. His work focused on the issue of potable water and diarrheal disease. These field notes focus on the implementation of sustainable technologies and practices for clean water. Emphasized is the importance of local knowledge, partnerships, and indigenous leadership. This story chronicles a two-year process of considering, rejecting, and finally developing the most workable solution for safe water: solar water purification. Unlike boiling and chlorination, this method was acceptable to the Kuna because it does not conflict with cultural practices on the island. It is likely that this method of water purification can be sustained over time.
Lower Bound of Concurrence for Qubit Systems
Creators: name: Zhu, Xue-Na
name: Fei, Shao-Ming
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the concurrence of four-qubit quantum states and provide analytical lower bounds of concurrence in terms of the monogamy inequality of concurrence for qubit systems. It is shown that these lower bounds are able to improve the existing bounds and detect entanglement better. The approach is generalized to arbitrary qubit systems.
description: 10 pages, 1 figures
Efficiency and Stability in a Process of Teams Formation
Creators: name: Boncinelli, Leonardo
name: Muscillo, Alessio
name: Pin, Paolo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Theoretical Economics (econ.TH)
subject: FOS: Economics and business

description: Motivated by data on coauthorships in scientific publications, we analyze a team formation process that generalizes matching models and network formation models, allowing for overlapping teams of heterogeneous size. We apply different notions of stability: myopic team-wise stability, which extends to our setup the concept of pair-wise stability, coalitional stability, where agents are perfectly rational and able to coordinate, and stochastic stability, where agents are myopic and errors occur with vanishing probability. We find that, in many cases, coalitional stability in no way refines myopic team-wise stability, while stochastically stable states are feasible states that maximize the overall number of activities performed by teams.
description: 44 pages
Sensitivity Analysis of Tolerances which Restrict Multiple Similar Features
Creators: name: Ziegler, Philipp
name: Wartzack, Sandro
Publisher: name: Technical University of Denmark, DTU : International Symposium on Robust Design
Year: 2014

description: In tolerancing, the product functions and quality should be ensured in the presence of geometric variations of the product components. For this purpose, tolerances restrict these geometric variations. Usually, the products functions are transferred to so-called functional key characteristics (FKC), which mostly are geometric quantities of the product. The requirements on the products functions are transferred to requirements of the FKCs. Afterwards, geometric analyses of the FKC variations are performed based on tolerance simulations. These simulations have input parameters (geometric deviation parameters) and output parameters (FKC deviation parameters). The aim of tolerance simulations is to set the tolerance values in a way that the FKC fulfil its requirements. In this context, sensitivity measures can quantify the impact of single tolerances with respect to a FKC (Ziegler and Wartzack, 2014). A common sensitivity analysis method bases on the conditional variance of the simulation output, which can be calculated by a number of different algorithms (Saltelli, et al, 2008).

Normally, a tolerance object is adopted on one geometry element. In some cases, tolerances can restrict multiple geometry elements. In this case, multiple sensitivity values for the geometry elements are calculated by standard sensitivity analysis. This is disadvantageous if the influence of the tolerance which restricts the geometry elements is of interest, because the sensitivity values cannot be simply added together. This paper discusses the case, when a position tolerance is adopted on multiple similar geometry elements. A statistical sampling method for the sensitivity analysis algorithms is introduced. The method is adopted to a hole pattern to show its practical use.
Model of solutions for data security in Cloud Computing
Creators: name: Priscakova, Zuzana
name: Rabova, Ivana
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: The aim of this paper is to develop a model to ensure data stored in the cloud. Model based on situations that arise in a business environment. The model also includes individual participants and their data operations. Implementation of the model is transferred using UML. The model is divided into 7 modules. Each module is apparent from the terms of data security and described specific situations when working with data. Based on this model it is possible to convert the implementation of cloud into enterprise environments with respect to data security in the firm.
Defining the role of healthcare leadership for organizational safety challenges
Creators: name: GOLDBERG, Ari
name: LEWIS, Vicki R.
name: KLEINER, Brian M.
Publisher: name: CPH Conference : 11th International Symposium on Human Factors in Organisational Design and Management
Year: 2014

description: This paper draws on healthcare work systems research conducted in several
healthcare facilities in both urban and rural domains in the United States to determine the most salient organizational design and management factors that impact intervention success, either negatively or positively. Thematically, the common technical subsystem focus across studies was the goal of reducing healthcare associated infections, which cause a risk to patients, healthcare workers and other stakeholders who visit healthcare facilities. The methodology used in these studies was MacroErgonomic Analysis and Design (MEAD). The objective of this paper is to heighten the awareness of ODAM factors that improve or impede process improvement efforts. The expected outcome is to provide information to help ergonomists prepare, plan, and manage their work system interventions to maximize system performance and well-being for patients and workers.
Jetzt Sonst; [1848]
Creators: name: (:Unav)
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2018

description: Flugblatt mit Karikatur zur Revolution in Frankfurt am Main 1848: Zwei uniformierte Personen darstellend einen Churhessen "Jetzt" die Auslagen eines Schaufenster betrachtend und einen Frankfurter "Sonst" vor einem Wachhaus im Dienst
Erdbeben von Düren 1755/56 – Spurensuche im Wald von Hürtgen
Creators: name: Dähling, Kira
name: Gerlach, Renate
name: Reicherter, Klaus
Publisher: name: Archäologie im Rheinland
Year: 2022

description: Archäologie im Rheinland, 2013(2014)
Where Science Meets Politics: Controversy Surrounding the Relationship Between Population Growth and Climate Change
Creators: name: Carver, Louise
Publisher: name: Columbia University
Year: 2010
Subjects: subject: Climatic changes--Social aspects
subject: Climatic changes--Government policy
subject: Population
subject: Sociology
subject: FOS: Sociology
subject: Climatic changes
subject: Public policy (Law)
subject: Political science
subject: FOS: Political science

description: There is an increasingly vociferous debate about whether population growth is relevant for climate mitigation policy. The production of scientific knowledge about this relationship, its use in policy and public arenas and interpretation by numerous third parties thereafter presents a political and ethical conundrum in which normative values are easily hidden.  Rather than assess the evidence for the contribution population growth might make to future greenhouse gas emissions (GHG), and the implicit or explicit population policy implications therein, this paper engages with a sociological analysis of the process of knowledge production to reveal why the controversy persists. This paper seeks to equip policy makers with a framework through which to navigate such values and thus overcome the apparent policy bind on the issue.
Interval-censored Hawkes processes
Creators: name: Rizoiu, Marian-Andrei
name: Soen, Alexander
name: Li, Shidi
name: Calderon, Pio
name: Dong, Leanne
name: Menon, Aditya Krishna
name: Xie, Lexing
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Interval-censored data solely records the aggregated counts of events during specific time intervals - such as the number of patients admitted to the hospital or the volume of vehicles passing traffic loop detectors - and not the exact occurrence time of the events. It is currently not understood how to fit the Hawkes point processes to this kind of data. Its typical loss function (the point process log-likelihood) cannot be computed without exact event times. Furthermore, it does not have the independent increments property to use the Poisson likelihood. This work builds a novel point process, a set of tools, and approximations for fitting Hawkes processes within interval-censored data scenarios. First, we define the Mean Behavior Poisson process (MBPP), a novel Poisson process with a direct parameter correspondence to the popular self-exciting Hawkes process. We fit MBPP in the interval-censored setting using an interval-censored Poisson log-likelihood (IC-LL). We use the parameter equivalence to uncover the parameters of the associated Hawkes process. Second, we introduce two novel exogenous functions to distinguish the exogenous from the endogenous events. We propose the multi-impulse exogenous function - for when the exogenous events are observed as event time - and the latent homogeneous Poisson process exogenous function - for when the exogenous events are presented as interval-censored volumes. Third, we provide several approximation methods to estimate the intensity and compensator function of MBPP when no analytical solution exists. Fourth and finally, we connect the interval-censored loss of MBPP to a broader class of Bregman divergence-based functions. Using the connection, we show that the popularity estimation algorithm Hawkes Intensity Process (HIP) is a particular case of the MBPP. We verify our models through empirical testing on synthetic data and real-world data.
Factors Affecting Farmers Decisions on Fertilizer Use: A Case Study for the Chaobai Watershed in Northern China
Creators: name: Zhou, Yuan
name: Yang, Hong
name: Mosler, Hans-Joachim
name: Abbaspour, Karim C.
Publisher: name: Columbia University
Year: 2010
Subjects: Irrigation farming
Farmers--Decision making
Nitrogen fertilizers--Environmental aspects
Water resources development--Management
Economics
Environmental sciences

description: The Chaobai watershed in northern China is the most important source of drinking water for Beijing. The level of fertilizer use, especially overuse, as well as farming practices in the region have therefore a great impact on the water quality downstream. This study analyses the factors influencing farmers’ decision on fertilizer use and the implications for water quality. The analysis is based on a survey of 349 farm households. It takes into consideration both farm and farmer specific characteristics and farmers’ subjective evaluation of factors shaping their decisions. Regression models are used to examine the determinants of fertilizer use intensity across farm households and to investigate the factors influencing the overuse of nitrogen. The results suggest the significance of many of these ‘subjective’ factors, indicating the importance of considering them in the analyses. The results also show that irrigation, gains in crop yield and farming goal of earning are positively correlated to fertilizer use intensity while farm size, manure application, soil fertility and the distance to fertilizer market are negatively correlated. Investigation of the overuse problem shows that higher education level significantly reduces the probability of overfertilization. Based on these findings a few policy relevant implications are discussed.
Active Matter Ratchets with an External Drift
Creators: name: Reichhardt, C.
name: Reichhardt, C. J. Olson
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: When active matter particles such as swimming bacteria are placed in an asymmetric array of funnels, it has been shown that a ratchet effect can occur even in the absence of an external drive. Here we examine active ratchets for two dimensional arrays of funnels or L-shapes where there is also an externally applied dc drive or drift. We show that for certain conditions, the ratchet effect can be strongly enhanced, and that it is possible to have conditions under which run-and-tumble particles with one run length move in the opposite direction from particles with a different run length. For the arrays of L-shapes, we find that the application of a drift force can enhance a transverse rectification in the direction perpendicular to the drift. When particle-particle steric interactions are included, we find that the ratchet effects can be either enhanced or suppressed depending on barrier geometry, particle run length, and particle density.
description: 9 pages, 12 postscript figures
Plasmonic Scaling of Superconducting Metamaterials
Creators: name: Kurter, C.
name: Abrahams, J.
name: Shvets, G.
name: Anlage, Steven M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Superconducting metamaterials are utilized to study the approach to the plasmonic limit simply by tuning temperature to modify the superfluid density, and thus the superfluid plasma frequency. We examine the persistence of artificial magnetism in a metamaterial made with superconductors in the plasmonic limit, and compare to the electromagnetic behavior of normal metals as a function of frequency as the plasma frequency is approached from below. Spiral-shaped Nb thin film meta-atoms of scaled dimensions are employed to explore the plasmonic behavior in these superconducting metamaterials, and the scaling condition allows extraction of the temperature dependent superfluid density, which is found to be in good agreement with expectations.
description: 5 pages, 3 figures
Holography for people with no time
Creators: name: Lin, Henry W.
name: Maldacena, Juan
name: Rozenberg, Liza
name: Shan, Jieru
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the gravitational description of extremal supersymmetric black holes. We point out that the $AdS_2$ near horizon geometry can be used to compute interesting observables, such as correlation functions of operators. In this limit, the Hamiltonian is zero and correlation functions are time independent. We discuss some possible implications for the gravity description of black hole microstates. We also compare with numerical results in a supersymmetric version of SYK. These results can also be interpreted as providing a construction of wormholes joining two extremal black holes. This is the short version of a longer and more technical companion paper arXiv:2207.00408.
description: 21 pages, 9 figures; v2: slightly expanded discussion, v3: minor improvements
Navigation of micro-swimmers in steady flow: the importance of symmetries
Creators: name: Qiu, J.
name: Mousavi, N.
name: Gustavsson, K.
name: Xu, C.
name: Mehlig, B.
name: Zhao, L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Marine microorganisms must cope with complex flow patterns and even turbulence as they navigate the ocean. To survive they must avoid predation and find efficient energy sources. A major difficulty in analysing possible survival strategies is that the time series of environmental cues in non-linear flow is complex, and that it depends on the decisions taken by the organism. One way of determining and evaluating optimal strategies is reinforcement learning. In a proof-of-principle study, Colabrese et al. [Phys. Rev. Lett. (2017)] used this method to find out how a micro-swimmer in a vortex flow can navigate towards the surface as quickly as possible, given a fixed swimming speed. The swimmer measured its instantaneous swimming direction and the local flow vorticity in the laboratory frame, and reacted to these cues by swimming either left, right, up, or down. However, usually a motile microorganism measures the local flow rather than global information, and it can only react in relation to the local flow, because in general it cannot access global information (such as up or down in the laboratory frame). Here we analyse optimal strategies with local signals and actions that do not refer to the laboratory frame. We demonstrate that symmetry-breaking is required in order to learn vertical migration in a meaningful way. Using reinforcement learning we analyse the emerging strategies for different sets of environmental cues that microorganisms are known to measure.
description: 20 pages, 5 figures
Male Characters and Masculine Representation in the Era of Diversity, Equity, and Inclusion in Hollywood
Creators: name: Temple, Matthew
Publisher: name: University of Chicago
Year: 2023
Subjects: subject: Masculinity
subject: Hollywood
subject: Gender
subject: Representation
subject: Screen Media
subject: Creators
subject: Diversity

description: This thesis sets out to fill a gap in understanding how Hollywood considers depictions of cis-men, the most dominant figures on screen. A large body of work has examined representations of women and gender-queer individuals in media, leaving a lacuna in the research on how men and masculinity are considered and depicted, except regarding how dominant males impact others. Gender is inter- and intra-relational; how men and masculinity are portrayed in film and television is vital to attaining equitable diversity and representation in the media and beyond. Through ethnographic research, this thesis examines how popular film and television writers, directors, and producers engage with men and masculinity within the larger discourse of representation, diversity, and inclusion. When creators consider how they represent their male characters, it is primarily in reaction to how they create and depict female characters. When interlocutors were asked how they consider gender when creating a project, they primarily responded with how they represent women. When asked specifically about how they consider men, answers often fell along the lines of what one director said: “I don't know how to answer that question.” Under-examined male representation leaves male characters in the hegemonic position of the baseline person, above and beyond gender. Unfortunately, it also pushes men to the sidelines of efforts to reimagine gender representation and stereotypes. The (r)evolution of gender representation cannot be complete without radically reimagining how males and masculinity are represented.
title: Barrikaten-Scene am 18ten September; [1848]
title: Baron Rotschirm: Was geht vor in mein Haus? Barrickatenmacher: Jetzt geht's los Herr Baron ...
titleType: Subtitle
Creators: name: Stern, S.
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2018

description: No. XXVI
Analyzing polarization swings in 3C 279
Creators: name: Kiehlmann, S.
name: Savolainen, T.
name: Jorstad, S. G.
name: Sokolovsky, K. V.
name: Schinzel, F. K.
name: Agudo, I.
name: Arkharov, A. A.
name: Benitez, E.
name: Berdyugin, A.
name: Blinov, D. A.
name: Bochkarev, N. G.
name: Borman, G. A.
name: Burenkov, A. N.
name: Casadio, C.
name: Doroshenko, V. T.
name: Efimova, N. V.
name: Fukazawa, Y.
name: Gomez, J. L.
name: Hagen-Thorn, V. A.
name: Heidt, J.
name: Hiriart, D.
name: Itoh, R.
name: Joshi, M.
name: Kimeridze, G. N.
name: Konstantinova, T. S.
name: Kopatskaya, E. N.
name: Korobtsev, I. V.
name: Kovalev, Y. Y.
name: Krajci, T.
name: Kurtanidze, O.
name: Kurtanidze, S. O.
name: Larionov, V. M.
name: Larionova, E. G.
name: Larionova, L. V.
name: Lindfors, E.
name: Lopez, J. M.
name: Marscher, A. P.
name: McHardy, I. M.
name: Molina, S. N.
name: Morozova, D. A.
name: Nazarov, S. V.
name: Nikolashvili, M. G.
name: Nilsson, K.
name: Pulatova, N. G.
name: Reinthal, R.
name: Sadun, A.
name: Sergeev, S. G.
name: Sigua, L. A.
name: Sorcia, M.
name: Spiridonova, O. I.
name: Takalo, L. O.
name: Taylor, B.
name: Troitsky, I. S.
name: Ugolkova, L. S.
name: Zensus, J. A.
name: Zhdanova, V. E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Quasar 3C 279 is known to exhibit episodes of optical polarization angle rotation. We present new, well-sampled optical polarization data for 3C 279 and introduce a method to distinguish between random and deterministic electric vector position angle (EVPA) variations. We observe EVPA rotations in both directions with different amplitudes and find that the EVPA variation shows characteristics of both random and deterministic cases. Our analysis indicates that the EVPA variation is likely dominated by a random process in the low brightness state of the jet and by a deterministic process in the flaring state.
description: 6 pages, 2 figures, 4 tables, proceeding to appear on EPJ Web of Conferences "The Innermost Regions of Relativistic Jets and their Magnetic Fields (Granada, Spain,10-14 June 2013)"
Close-circuit domain quadruplets in BaTiO$_3$ nanorods embedded in SrTiO$_3$ film
Creators: name: Stepkova, V.
name: Marton, P.
name: Setter, N.
name: Hlinka, J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Cylindrical BaTiO3 nanorods embedded in (100)-oriented SrTiO3 epitaxial film in a brush-like configuration are investigated in the framework of the Ginzburg-Landau-Devonshire model. It is shown that strain compatibility at BaTiO3/SrTiO3 interfaces keeps BaTiO3 nanorods in the rhombohedral phase even at room temperature. Depolarization field at the BaTiO3/SrTiO3 interfaces is reduced by an emission of the 109-degree or 71-degree domain boundaries. In case of nanorods of about 10-80 nm diameter, the ferroelectric domains are found to form a quadruplet with a robust flux-closure arrangement of the in-plane components of the spontaneous polarization. The out-of-plane components of the polarization are either balanced or oriented up or down along the nanorod axis. Switching of the out-of-plane polarization with coercive field of about $5.10^6$ V/m occurs as a collapse of a 71-degree cylindrical domain boundary formed at the curved circumference surface of the nanorod. The remnant domain quadruplet configuration is chiral, with the $C_4$ macroscopic symmetry. More complex stable domain configurations with coexisting clockwise and anticlockwise quadruplets contain interesting arrangement of strongly curved 71-degree boundaries.
description: Erratta - corrected error in Fig. 1
What Do Experiments in Optics tell us about Photon Momentum in Media?
Creators: name: Brevik, Iver
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: In order to get some insight in the intricacies of the Abraham-Minkowski energy-momentum problem in phenomenological electrodynamics, we briefly analyze eight different experimental situations in radiation optics. Six of the experiments are already existing, while the remaining two are suggestions for future endeavors. Among the first six, we distinguish between three which are incapable of informing about photon momentum in a medium, and the remaining three which are able to give us useful information. Our general conclusion is that the Abraham-Minkowski "problem" is essentially a matter of convenience. In actual physical situations it is the Minkowski expression which is most natural alternative to employ. Also, in a canonical context, it is the Minkowski energy-momentum tensor which is the most convenient alternative to work with, as this tensor is divergence-free causing the total radiation momentum and energy to make up a four-vector, although notably a spacelike one.
description: 11 pages latex,no figures. Submitted to the Festschrift for Johan H\oye
Control of Mechanical Systems via Feedback Linearization Based on Black-Box Gaussian Process Models
Creators: name: Libera, Alberto Dalla
name: Amadio, Fabio
name: Nikovski, Daniel
name: Carli, Ruggero
name: Romeres, Diego
Publisher: name: arXiv
Year: 2021
Subjects: subject: Systems and Control (eess.SY)
subject: Robotics (cs.RO)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: In this paper, we consider the use of black-box Gaussian process (GP) models for trajectory tracking control based on feedback linearization, in the context of mechanical systems. We considered two strategies. The first computes the control input directly by using the GP model, whereas the second computes the input after estimating the individual components of the dynamics. We tested the two strategies on a simulated manipulator with seven degrees of freedom, also varying the GP kernel choice. Results show that the second implementation is more robust w.r.t. the kernel choice and model inaccuracies. Moreover, as regards the choice of kernel, the obtained performance shows that the use of a structured kernel, such as a polynomial kernel, is advantageous, because of its effectiveness with both strategies.
People construct simplified mental representations to plan
Creators: name: Ho, Mark K.
name: Abel, David
name: Correa, Carlos G.
name: Littman, Michael L.
name: Cohen, Jonathan D.
name: Griffiths, Thomas L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: One of the most striking features of human cognition is the capacity to plan. Two aspects of human planning stand out: its efficiency and flexibility. Efficiency is especially impressive because plans must often be made in complex environments, and yet people successfully plan solutions to myriad everyday problems despite having limited cognitive resources. Standard accounts in psychology, economics, and artificial intelligence have suggested human planning succeeds because people have a complete representation of a task and then use heuristics to plan future actions in that representation. However, this approach generally assumes that task representations are fixed. Here, we propose that task representations can be controlled and that such control provides opportunities to quickly simplify problems and more easily reason about them. We propose a computational account of this simplification process and, in a series of pre-registered behavioral experiments, show that it is subject to online cognitive control and that people optimally balance the complexity of a task representation and its utility for planning and acting. These results demonstrate how strategically perceiving and conceiving problems facilitates the effective use of limited cognitive resources.
description: 56 pages, 5 main figures, 10 extended data figures, supplementary information is included in ancillary files
Nonthermal radiation of young supernova remnants: the case of Cas A
Creators: name: Zirakashvili, V. N.
name: Aharonian, F. A.
name: Yang, R.
name: Ona-Wilhelmi, E.
name: Tuffs, R. J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The processes responsible for the broad-band radiation of the young supernova remnant Cas A are explored using a new code which is designed for a detailed treatment of the diffusive shock acceleration of particles in nonlinear regime. The model is based on spherically symmetric hydrodynamic equations complemented with transport equations for relativistic particles. Electrons, protons and the oxygen ions accelerated by forward and reverse shocks are included in the numerical calculations. We show that the available multi-wavelength observations in the radio, X-ray and gamma-ray bands can be best explained by invoking particle acceleration by both forward and reversed shocks. Although the TeV gamma-ray observations can be interpreted by interactions of both accelerated electrons and protons/ions, the measurements by Fermi LAT at energies below 1 GeV give a tentative preference to the hadronic origin of gamma-rays. Then, the acceleration efficiency in this source, despite the previous claims, should be very high; 25% of the explosion energy (or approximately $3\cdot 10^{50}$ erg) should already be converted to cosmic rays, mainly by the forward shock. At the same time, the model calculations do not provide extension of the maximum energy of accelerated protons beyond 100 TeV. In this model, the acceleration of electrons is dominated by the reverse shock; the required $10^{48}$ erg can be achieved under the assumption that the injection of electrons (positrons) is supported by the radioactive decay of $^{44}$Ti.
description: 28 pages, 14 figures, 3 tables, submitted to ApJ
Einfach tiefer gelegt – Untersuchungen in der evangelischen Kirche von Orsoy
Creators: name: Hupka, Dieter
name: Herdemerten, Dirk
name: Schoenfelder, Uwe
Publisher: name: Archäologie im Rheinland
Year: 2022

description: Archäologie im Rheinland, 2013(2014)
Classification of measurement-based quantum wire in stabilizer PEPS
Creators: name: Herringer, Paul
name: Raussendorf, Robert
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider a class of translation-invariant 2D tensor network states with a stabilizer symmetry, which we call stabilizer PEPS. The cluster state, GHZ state, and states in the toric code belong to this class. We investigate the transmission capacity of stabilizer PEPS for measurement-based quantum wire, and arrive at a complete classification of transmission behaviors. The transmission behaviors fall into 13 classes, one of which corresponds to Clifford quantum cellular automata. In addition, we identify 12 other classes.
description: 15 pages, 7 figures
LINGUISTIC MODEL OF DOCTOR-PATIENT COMMUNICATION IN ENGLISH
Creators: name: Sapaeva, Dilfuza
Publisher: name: Zenodo
Year: 2025

description: This article focuses on the analysis of spoken medical discourse within doctor-patient interactions, which many researchers view as a linguistic model. The doctor-patient relationship remains a pressing issue in contemporary society. A key goal of medical discourse is to establish effective communication between doctor and patient, enabling the identification of the illness, selection of appropriate treatment, and clear explanation of medical procedures using accessible language.
Square root problem and Subnormal Aluthge transforms
Creators: name: Azhar, Hamza El
name: Hanine, Abdelouahab
name: Idrissi, Kaissar
name: Zerouali, El Hassan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 47B20, 47B37

description: For a non negative measure $μ$ with $p$ atoms, we study the relation between the Square Root Problem of $μ$ and the problem of subnormality of ${\tilde W_μ}$ the Aluthge transform of the associated unilateral weighted shift. We use an approach based on uniquely represented elements in the support of $μ*μ$. We first show that if ${\tilde W_μ}$ is subnormal, then $2p-1\le card(supp(μ*μ))\le [\frac{(p-1)^2+6}{2}]$. We rewrite several results known for finitely atomic measure having at most five atoms and give a complete solution for measures six atoms.
description: 19 pages, 1 figure
Human factors specialists to the rescue for (other) systems designers – case study in railway
Creators: name: B.J. SCHREIBERS, Kirsten
name: VAN DER WEIDE, Richard
name: WEEDA, Colete
Publisher: name: CPH Conference : 11th International Symposium on Human Factors in Organisational Design and Management
Year: 2014

description: It is a challenge for human factors professionals to be seen as a colleague system designer of man-machine systems. Mostly, they are consulted for detailed user interface design. However, in this design phase fundamental questions about task allocation necessary for an optimal man-machine interface are cut short. This case describes the development of a warning system for train drivers to illustrate the role of the human factors specialist. The original question for the warning system turned from detailed design level towards a full partnership in system design by covering issues in which human factors specialists distinguish themselves from IT specialists.
Energy benchmarks for water clusters and ice structures from an embedded many-body expansion
Creators: name: Gillan, M. J.
name: Alfe, D.
name: Bygrave, P. J.
name: Taylor, C. R.
name: Manby, F. R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We show how an embedded many-body expansion (EMBE) can be used to calculate accurate \emph{ab initio} energies of water clusters and ice structures using wavefunction-based methods. We use the EMBE described recently by Bygrave \emph{et al.} (J. Chem. Phys. \textbf{137}, 164102 (2012)), in which the terms in the expansion are obtained from calculations on monomers, dimers, etc. acted on by an approximate representation of the embedding field due to all other molecules in the system, this field being a sum of Coulomb and exchange-repulsion fields. Our strategy is to separate the total energy of the system into Hartree-Fock and correlation parts, using the EMBE only for the correlation energy, with the Hartree-Fock energy calculated using standard molecular quantum chemistry for clusters and plane-wave methods for crystals. Our tests on a range of different water clusters up to the 16-mer show that for the second-order Møller-Plesset (MP2) method the EMBE truncated at 2-body level reproduces to better than 0.1 m$E_{\rm h}$/monomer the correlation energy from standard methods. The use of EMBE for computing coupled-cluster energies of clusters is also discussed. For the ice structures Ih, II and VIII, we find that MP2 energies near the complete basis-set limit reproduce very well the experimental values of the absolute and relative binding energies, but that the use of coupled-cluster methods for many-body correlation (non-additive dispersion) is essential for a full description. Possible future applications of the EMBE approach are suggested.
On homogeneous spaces with finite anti-solvable stabilizers
Creators: name: Arteche, Giancarlo Lucchini
Publisher: name: arXiv
Year: 2021
Subjects: subject: Algebraic Geometry (math.AG)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 14M17, 12G05, 14G05

description: We say that a group is anti-solvable if all of its composition factors are non-abelian. We consider a particular family of anti-solvable finite groups containing the simple alternating groups for $n\neq 6$ and all 26 sporadic simple groups. We prove that, if $K$ is a perfect field and $X$ is a homogeneous space of a smooth algebraic $K$-group $G$ with finite geometric stabilizers lying in this family, then $X$ is dominated by a $G$-torsor. In particular, if $G=\mathrm{SL}_n$, all such homogeneous spaces have rational points.
description: 3 pages. Comments welcome :D
title: Volkstribun No. 3!; [1849?]
title: "Vorwärts "diametral"! Ich bin Euer General!"
titleType: Subtitle
Creators: name: (:Unav)
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2018

description: Flugblatt mit Karikatur zu Ludwig Fürst von Oettingen-Wallerstein und den Münchener Zeitungsschreibern Sachs und Vogt. Der Fürst trägt eine Fahne mit Aufschrift "Es lebe das Protetariat!"
On the SW Sex-Type Eclipsing Cataclysmic Variable SDSS0756+0858
Creators: name: Tovmassian, Gagik
name: Hernandez, Mercedes Stephania
name: Gonzalez-Buitrago, Diego
name: Zharikov, Sergey
name: García-Díaz, Maria Teresa
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We conducted a spectroscopic and photometric study of SDSS J075653.11+085831. X-ray observations were also attempted. We determined the orbital period of this binary system to be 3.29 hr. It is a deep eclipsing system, whose spectra shows mostly single-peaked Balmer emission lines and a rather intense He II line. There is also the presence of faint (often double-peaked) He I emission lines as well as several absorption lines, Mg I being the most prominent. All of these features point towards the affiliation of this object with the growing number of SW~Sex-type objects. We developed a phenomenological model of an SW~Sex system to reproduce the observed photometric and spectral features.
description: 14 pages, 8 figures. Accepted for publication in Astron. J. (10 Dec 2013)
Generalization Error Rates in Kernel Regression: The Crossover from the Noiseless to Noisy Regime
Creators: name: Cui, Hugo
name: Loureiro, Bruno
name: Krzakala, Florent
name: Zdeborová, Lenka
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (stat.ML)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: In this manuscript we consider Kernel Ridge Regression (KRR) under the Gaussian design. Exponents for the decay of the excess generalization error of KRR have been reported in various works under the assumption of power-law decay of eigenvalues of the features co-variance. These decays were, however, provided for sizeably different setups, namely in the noiseless case with constant regularization and in the noisy optimally regularized case. Intermediary settings have been left substantially uncharted. In this work, we unify and extend this line of work, providing characterization of all regimes and excess error decay rates that can be observed in terms of the interplay of noise and regularization. In particular, we show the existence of a transition in the noisy setting between the noiseless exponents to its noisy values as the sample complexity is increased. Finally, we illustrate how this crossover can also be observed on real data sets.
description: 22 pages, 10 figures, 2 tables
Asymptotics of representation learning in finite Bayesian neural networks
Creators: name: Zavatone-Veth, Jacob A.
name: Canatar, Abdulkadir
name: Ruben, Benjamin S.
name: Pehlevan, Cengiz
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Recent works have suggested that finite Bayesian neural networks may sometimes outperform their infinite cousins because finite networks can flexibly adapt their internal representations. However, our theoretical understanding of how the learned hidden layer representations of finite networks differ from the fixed representations of infinite networks remains incomplete. Perturbative finite-width corrections to the network prior and posterior have been studied, but the asymptotics of learned features have not been fully characterized. Here, we argue that the leading finite-width corrections to the average feature kernels for any Bayesian network with linear readout and Gaussian likelihood have a largely universal form. We illustrate this explicitly for three tractable network architectures: deep linear fully-connected and convolutional networks, and networks with a single nonlinear hidden layer. Our results begin to elucidate how task-relevant learning signals shape the hidden layer representations of wide Bayesian neural networks.
description: 13+28 pages, 4 figures; v3: extensive revision with improved exposition and new section on CNNs, accepted to NeurIPS 2021; v4: minor updates to supplement; v5: post-NeurIPS update, minor typos fixed
Analytical relation between the Polyakov loop and Dirac eigenvalues in temporally odd-number lattice QCD
Creators: name: Suganuma, Hideo
name: Doi, Takahiro M.
name: Iritani, Takumi
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We derive an analytical gauge-invariant relation between the Polyakov loop $\langle L_P \rangle$ and the Dirac eigenvalues $λ_n$ in QCD, i.e., $\langle L_P \rangle \propto \sum_n λ_n^{N_t -1} \langle n|\hat U_4|n \rangle$, on a temporally odd-number lattice, where the temporal lattice size $N_t$ is odd. Here, we use an ordinary square lattice with the normal (nontwisted) periodic boundary condition for link-variables in the temporal direction. This relation is a Dirac spectral representation of the Polyakov loop in terms of Dirac eigenmodes $|n\rangle$. Because of the factor $λ_n^{N_t -1}$ in the Dirac spectral sum, this analytical relation indicates negligibly small contribution of low-lying Dirac modes to the Polyakov loop in both confined and deconfined phases, while the low-lying Dirac modes are essential for chiral symmetry breaking. Also, we numerically confirm the analytical relation, non-zero finiteness of $\langle n|\hat U_4|n \rangle$, and tiny contribution of low-lying Dirac modes to the Polyakov loop in lattice QCD simulations. Thus, we conclude that low-lying Dirac modes are not essential modes for confinement, and there is no direct one-to-one correspondence between confinement and chiral symmetry breaking in QCD.
description: Proc. of LATTICE2013