cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Policy Search in Kernel Hilbert Space
Creators: name: J. Andrew  Bagnell
name: Schneider, Jeff
Publisher: name: Figshare
Year: 2018
Subjects: subject: 80101 Adaptive Agents and Intelligent Robotics
subject: FOS: Computer and information sciences

description: Much recent work in reinforcement learning and
stochastic optimal control has focused on algorithms
that search directly through a space of
policies rather than building approximate value
functions. Policy search has numerous advantages:
it does not rely on the Markov assumption,
domain knowledge may be encoded in a
policy, the policy may require less representational
power than a value-function approximation,
and stable and convergent algorithms are
well-understood. In contrast with value-function
methods, however, existing approaches to policy
search have heretofore focused entirely on
parametric approaches. This places fundamental
limits on the kind of policies that can be
represented. In this work, we show how policy
search (with or without the additional guidance
of value-functions) in a ReproducingKernel
Hilbert Space gives a simple and rigorous extension
of the technique to non-parametric settings.

In particular, we investigate a new class of algorithms
which generalize REINFORCE-style likelihood
ratio methods to yield both online and
batch techniques that perform gradient search in
a function space of policies. Further, we describe
the computational tools that allow efficient implementation.
Finally, we apply our new techniques
towards interesting reinforcement learning
problems.
Buchbestellung an der TH AB (Fernleihe)
Creators: name: Grahl, Tina
Publisher: name: Zenodo
Year: 2022

description: Sie suchen ein Buch, das in der TH-Bibliothek Aschaffenburg nicht verfügbar ist? Über die Fernleihe können Sie Literatur aus anderen deutschen Bibliotheken bestellen.
 Über die Aufsatzsuche des Gateway Bayern können Sie Literatur recherchieren und eine Fernleihbestellung aufgeben. Dazu ist nur Ihre Bibliotheksnummer notwendig, die sie auf Ihrer CampusCard aufgedruckt finden.
Dynamic choosability of triangle-free graphs and sparse random graphs
Creators: name: Kim, Jaehoon
name: Ok, Seongmin
Publisher: name: arXiv
Year: 2015
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C15

description: The \textit{$r$-dynamic choosability} of a graph $G$, written ${\rm ch}_r(G)$, is the least $k$ such that whenever each vertex is assigned a list of at least $k$ colors a proper coloring can be chosen from the lists so that every vertex $v$ has at least $\min\{d_G(v),r\}$ neighbors of distinct colors. Let ${\rm ch}(G)$ denote the choice number of $G$. In this paper, we prove ${\rm ch}_r(G)\leq (1+o(1)){\rm ch}(G)$ when $\frac{Δ(G)}{δ(G)}$ is bounded. We also show that there exists a constant $C$ such that for the random graph $G=G(n,p)$ with $\frac{2}{n}
Two-photon quantum walk in a multimode fiber
Creators: name: Defienne, Hugo
name: Barbieri, Marco
name: Walmsley, Ian A.
name: Smith, Brian J.
name: Gigan, Sylvain
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Multi-photon propagation in connected structures - a quantum walk - offers the potential for simulating complex physical systems and provides a route to universal quantum computation. Increasing the complexity of quantum photonic networks where the walk occurs is essential for many applications. Here, we implement a quantum walk of indistinguishable photon pairs in a multimode fiber supporting 380 modes. Using wavefront shaping, we control the propagation of the two-photon state through the fiber in which all modes are coupled. Excitation of arbitrary output modes of the system is realized by controlling classical and quantum interferences. This experiment demonstrates a highly multimode platform for multi-photon interference experiments and provides a powerful method to program a general high-dimensional multiport optical circuit. This work paves the way for the next generation of photonic devices for quantum simulation, computing and communication.
description: 11 pages, 4 figures
Economic Reforms : Income Tax Without Borders
Creators: name: Ramesh, Prof. (Dr.)
name: G, Raghu
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 480106
subject: Taxation law

description: The concept of global village has spread far and wide almost dissolving national boundaries. A vast majority of countries levy tax on income earned by their residents from sources inside and outside their own territory, which means that they apply the "worldwide income principle" which otherwise is called income tax without borders. This concept of borderless taxation or cross border taxation has gained currency due to the emergence of multinational companies. Many issues like Transfer Pricing Place of Permanent Establishment, Double Taxation Treaty, U N Model Vienna Convention and other key issues are the result of debate on Taxation without Borders. These cross border transaction or taxation without borders from Indian perspective has, in recent past, have resulted in unsettling quite a few revenue officials as well as tax professionals. The present paper looks at the concept of tax without borders and its dimensions. This point of view paper tries to look into the debate with regard to the cross border taxation within the framework of Indian polity.
New model of calculating the energy transfer efficiency for the spherical theta-pinch device
Creators: name: Xu, G.
name: Hock, C.
name: Loisch, G.
name: Xiao, G.
name: Jacoby, J.
name: Weyrich, K.
name: Li, Y.
name: Zhao, Y.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Ion-beam-plasma-interaction plays an important role in the field of Warm Dense Matter (WDM) and Inertial Confinement Fusion (ICF). A spherical theta pinch is proposed to act as a plasma target in various applications including a plasma stripper cell. One key parameter for such applications is the free electron density. A linear dependency of this density to the amount of energy transferred into the plasma from an energy storage was found by C. Teske. Since the amount of stored energy is known, the energy transfer efficiency is a reliable parameter for the design of a spherical theta pinch device. The traditional two models of energy transfer efficiency are based on assumptions which comprise the risk of systematical errors. To obtain precise results, this paper proposes a new model without the necessity of any assumption to calculate the energy transfer efficiency for an inductively coupled plasma device. Further, a comparison of these three different models is given at a fixed operation voltage for the full range of working gas pressures. Due to the inappropriate assumptions included in the traditional models, one owns a tendency to overestimate the energy transfer efficiency whereas the other leads to an underestimation. Applying our new model to a wide spread set of operation voltages and gas pressures, an overall picture of the energy transfer efficiency results.
Moreira de Sá, A., Auctarium Chartularii Universitatis Portugalensis, Vol. 1. Ed. Instituto de Alta Cultura. Vol. de 453 ps. 220x295. Lisboa 1973
Creators: name: Arieiro, José
Publisher: name: Theologica
Year: 1974

description: Theologica, v. 9 n. 4 (1974)
Photoionization of few electron systems with a hybrid Coupled Channels approach
Creators: name: Majety, Vinay Pramod
name: Zielinski, Alejandro
name: Scrinzi, Armin
Publisher: name: arXiv
Year: 2014
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We present the hybrid anti-symmetrized coupled channels method for the calculation of fully differential photo-electron spectra of multi-electron atoms and small molecules interacting with strong laser fields. The method unites quantum chemical few-body electronic structure with strong-field dynamics by solving the time dependent Schrödinger equation in a fully anti-symmetrized basis composed of multi-electron states from quantum chemistry and a one-electron numerical basis. Photoelectron spectra are obtained via the time dependent surface flux (tSURFF) method. Performance and accuracy of the approach are demonstrated for spectra from the helium and berryllium atoms and the hydrogen molecule in linearly polarized laser fields at wavelength from 21 nm to 400 nm. At long wavelengths, helium and the hydrogen molecule at equilibrium inter-nuclear distance can be approximated as single channel systems whereas beryllium needs a multi-channel description.
Sá, A. Moreira de, Chartularium Universitatis Portugalensis (1288-1537). Vol. V. Ed. Instituto de Alta Cultura. Vol. de 516 ps. 225x300. Lisboa 1972
Creators: name: Arieiro, José
Publisher: name: Theologica
Year: 1974

description: Theologica, v. 9 n. 4 (1974)
Vários, Teologia de la renovación. T. I: renovación del pensamiento religioso T. II: renovación de las estruturas religiosas. Ed. Sígueme. Col. «Verdad e imagen» nn. 27-28. Vols. de 342 e 408 ps., respectivamente. 120x190. Salamanca 1972
Creators: name: Correia, Francisco Carvalho
Publisher: name: Theologica
Year: 1974

description: Theologica, v. 9 n. 4 (1974)
Constraints on the Active and Sterile Neutrino Masses from Beta-Ray Spectra: Past, Present and Future
Creators: name: Dragoun, Otokar
name: Vénos, Drahoslav
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Although neutrinos are probably the most abundant particles of the universe their mass is not yet known. Oscillation experiments have proven that at least one of the neutrino mass states has m_{i}>0.05 eV while various interpretations of cosmological observations yielded an upper limit for the sum of neutrino masses \sum m_{i}
description: 42 pages, 33 figures, 2 tables, 235 references, review article
On the breakdown of the curvature perturbation ζ during reheating
Creators: name: Algan, Merve Tarman
name: Kaya, Ali
name: Kutluk, Emine Seyma
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: FOS: Physical sciences

description: It is known that in single scalar field inflationary models the standard curvature perturbation ζ, which is supposedly conserved at superhorizon scales, diverges during reheating at times dΦ/dt=0, i.e. when the time derivative of the background inflaton field vanishes. This happens because the comoving gauge ϕ=0, where ϕ denotes the inflaton perturbation, breaks down when dΦ/dt=0. The issue is usually bypassed by averaging out the inflaton oscillations but strictly speaking the evolution of ζ is ill posed mathematically. We solve this problem in the free theory by introducing a family of smooth gauges that still eliminates the inflaton fluctuation ϕ in the Hamiltonian formalism and gives a well behaved curvature perturbation ζ, which is now rigorously conserved at superhorizon scales. At the linearized level, this conserved variable can be used to unambiguously propagate the inflationary perturbations from the end of inflation to subsequent epochs. We discuss the implications of our results for the inflationary predictions.
description: 23 pages, 1 figure, revtex4-1, v2: a reference added, minor changes
title: Συμμετοχικές διαδικασίες και ψηφιακή κατασκευή: Μια πιλοτική σχεδιαστική εφαρμογή στο Πολυτεχνείο Κρήτης
title: Participatory processes and digital fabrication: A pilot case study at the Technical University of Crete
Creators: name: Γουρουντη Ευχαρις
name: Ιβοπουλος Χρηστος
Publisher: name: Technical University of Crete
Year: 2023

description: Η παρούσα διπλωματική εργασία, αφορά την πειραματικη σύμπραξη συμμετοχικών πρακτικών και τεχνικών ψηφιακής κατασκευής για την ενεργοποίηση ανεκμετάλλευτων κοινόχρηστων χώρων. Με αφορμή τη χαμηλή αλληλεπίδραση των φοιτητών με τους ανοιχτούς  χώρους του Πολυτεχνείου Κρήτης, γίνεται πιλοτική εφαρμογή της παραπάνω ερευνας στην πολυτεχνειούπολη.
Hervada, Javier, Diálogos sobre o amor e o matrimónio. Ed. «Palavra e Vida». e «Celebração Litúrgica». Vol. de 292 ps. 128x185. Braga 1974
Creators: name: Correia, Francisco Carvalho
Publisher: name: Theologica
Year: 1974

description: Theologica, v. 9 n. 4 (1974)
Tailor-made reduction of a chemical kinetic reaction mechanism for the combustion of C2H4 / N2O mixtures
Creators: name:  T. METHLING
name:   C. JANZER
Publisher: name: Proceedings of  the 9th European Conference for Aerospace Sciences. Lille, France, 27 June - 1 July, 2022
Year: 2022
Subjects: PROPULSION PHYSICS
FUTURE FUELS

description: Abstract Mixtures of ethylene and nitrous oxideso called green propellantsare promising replacements of carcinogenic hydrazine as propellants for in-space propulsion systems. The design of next generation thrusters, using these propellants, requires experimental testing with the support of sophisticated numerical CFD simulations. For the numerically expensive reactive flow simulations, accurate and efficient chemical kinetic mechanisms for the combustion of these green propellants are inevitable. Within this work a recently developed optimised chemical kinetic model DLR SynNG + NO v0.2 [1] for mixtures of C2H4 / N2O was reduced for boundary conditions which are representative for the combustion in satellite thrusters. The application of the rapid reduction method of the linear transformation model [2] allowed a significant reduction of the number of modelled species from 165 to 35. Due to the post optimisation of this highly efficient chemical kinetic model, the predictive capability of the detailed, validated model was kept. Specifically, quantities of interest like ignition delay times, laminar flame speeds and species profiles in homogeneous reactors and laminar reactive flows are in excellent agreement between the detailed and reduced model. Thereby, a special focus was set on the accurate prediction of O and H species profiles which are required in the numerical model e.g. to simulate OH chemiluminescence. This allows the extended comparison with experimental values, for which OH chemiluminescence is typically observed to localise and characterise the combustion processes. The newly developed reduced model is applicable in CFD simulations and directly supports the efficient and effective design of novel in-space thrusters using advanced green propellants. References [1] Janzer, C., Richter, S., Naumann, C. and Methling, T. Green propellants as a hydrazine substitute: experimental investigations of ethane/ethene-nitrous oxide mixtures and validation of detailed reaction mechanism. CEAS Space J (2021): 1-9. [2] Methling, T., Braun-Unkhoff, M., and Riedel, U. \"A novel linear transformation model for the analysis and optimisation of chemical kinetics.\" Combustion Theory and Modelling 21.3 (2017): 503-528.
Spatial accessibility of pediatric primary healthcare: Measurement and inference
Creators: name: Nobles, Mallory
name: Serban, Nicoleta
name: Swann, Julie
Publisher: name: arXiv
Year: 2015
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: Although improving financial access is in the spotlight of the current U.S. health policy agenda, this alone does not address universal and comprehensive healthcare. Affordability is one barrier to healthcare, but others such as availability and accessibility, together defined as spatial accessibility, are equally important. In this paper, we develop a measurement and modeling framework that can be used to infer the impact of policy changes on disparities in spatial accessibility within and across different population groups. The underlying model for measuring spatial accessibility is optimization-based and accounts for constraints in the healthcare delivery system. The measurement method is complemented by statistical modeling and inference on the impact of various potential contributing factors to disparities in spatial accessibility. The emphasis of this study is on children's accessibility to primary care pediatricians, piloted for the state of Georgia. We focus on disparities in accessibility between and within two populations: children insured by Medicaid and other children. We find that disparities in spatial accessibility to pediatric primary care in Georgia are significant, and resistant to many policy interventions, suggesting the need for major changes to the structure of Georgia's pediatric healthcare provider network.
description: Published in at http://dx.doi.org/10.1214/14-AOAS728 the Annals of Applied Statistics (http://www.imstat.org/aoas/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Planning to Fail - Reliability as a Design Parameter for Planetary Rover Missions
Creators: name: S.  Stancliff
name: Dolan, John
name: A.  Trebi-Ollennu
Publisher: name: Figshare
Year: 2018
Subjects: subject: 80101 Adaptive Agents and Intelligent Robotics
subject: FOS: Computer and information sciences

description: The Mars Exploration Rovers (MER) have been
operating on Mars for more than three years. The extremely high
reliability demonstrated by these rovers is a great success story in
robotic design. This reliability comes at a high cost, however, both
in the initial cost of developing the rovers and in the ongoing
operational costs for their mission extensions. If it were possible to
design rovers with reliability more in line with their mission
requirements (in the case of MER, 90 days), considerable cost
reductions could be achieved. This will be even more important for
future planetary robotic missions due to greatly increased mission
durations.

In this paper we present an overview of our ongoing research in
the area of predicting robot mission reliability, and we show how a
mission designer can trade off reliability against costs in order to find
an optimal reliability target for a given robotic mission. Our results
show that for a given mission there is an optimal reliability range
with respect to cost and that having rovers with reliability that is too
low or too high is suboptimal from an economic standpoint. This
suggests that a better cost-reliability tradeoff can be obtained by
"planning to fail" by designing rovers which have lower reliability
than current legacy designs.
A magnified view of star formation at redshift 0.9 from two lensed galaxies
Creators: name: Olmstead, Alice
name: Rigby, Jane R.
name: Swinbank, Mark
name: Veilleux, Sylvain
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present new narrow-band H alpha imaging from the Hubble Space Telescope of two redshift 0.91 galaxies that have been lensed by foreground galaxy cluster Abell 2390. These data probe spatial scales as small as 0.3 kpc, providing a magnified look at the morphology of star formation at an epoch when the global star formation rate was high. However, dust attenuates our spatially resolved star formation rate (SFR) indicators, the H alpha and rest-UV emission, and we lack a direct measurement of extinction. Other studies have found that ionized gas in galaxies tends to be roughly 50 percent more obscured than stars; however, given an unextincted measurement of the SFR we can quantify the relative stellar to nebular extinction and the extinction in Hα. We infer SFRs from Spitzer and Herschel mid- to far-infrared observations and compare these to integrated H alpha and rest-UV SFRs; this yields stellar to nebular extinction ratios consistent with previous studies. We take advantage of high spatial resolution and contextualize these results in terms of the source-plane morphologies, comparing the distribution of H alpha to that of the rest-frame UV and optical light. In one galaxy, we measure separate SFRs in visually distinct clumps, but can set only a lower limit on the extinction and thus the star formation. Consequently, the data are also consistent with there being an equal amount of extinction along the lines of sight to the ionized gas as to the stars. Future observations in the far-infrared could settle this by mapping out the dust directly.
description: Published as 2014, The Astronomical Journal, 148, 65
Del Amo, León, Interrogatório y confesión en los juicios matrimoniales. Ed. EUNSA. 1 vol. de XXIV+594 ps. 170x240. Pamplona 1973
Creators: name: Marques, José António
Publisher: name: Theologica
Year: 1974

description: Theologica, v. 9 n. 4 (1974)
title: Editorial
Creators: name: Cameron, Sandy
Publisher: name: Strathprints - University of Strathclyde
Year: 2005

description: For ten years now, I have had the privilege of chairing the management committees of both the Centre for Residential Child Care and then the Scottish Institute for Residential Child Care (SIRCC). As I look back over the years I think Scotland can be proud of what it has set out to do in creating better services for our young people. The commitment by government to invest in setting up a unique institute in the form of SIRCC sent out a clear signal that residential child care has an enduring and important place on the spectrum of services for those children and young people who need and will continue to need public care. The very presence of this journal is evidence of the opportunity that has been taken to improve the understanding and knowledge that must underpin our services.
De Diego-Lora, Carmelo, Estúdios de Derecho procesal canónico. I. Temas sobre el ejercicio de la «potestas judicialis». II. Temas sobre causas matrimoniales. Ed. EUNSA. 2 vols. de 440 e 392 ps. 145x210. Pamplona 1973
Creators: name: Marques, José António
Publisher: name: Theologica
Year: 1974

description: Theologica, v. 9 n. 4 (1974)
Plays as Team Plans for Coordination and Adaptation
Creators: name: Bowling, Michael
name: Browning, Brett
name: Chang, Allen
name: Veloso, Manuela M.
Publisher: name: Figshare
Year: 2018
Subjects: subject: 80101 Adaptive Agents and Intelligent Robotics
subject: FOS: Computer and information sciences

description: Coordinated action for a team of robots is a challenging problem, especially
in dynamic, unpredictable environments. In the context of robot soccer,
a complex domain with teams of robots in an adversarial setting, there is a great
deal of uncertainty in the opponent’s behavior and capabilities. We introduce the
concept of a play as a team plan, which combines both reactive principles, which
are the focus of traditional approaches for coordinating actions, and deliberative
principles. We introduce the concept of a playbook as a method for seamlessly
combining multiple team plans. The playbook provides a set of alternative team
behaviors which form the basis for our third contribution of play adaptation. We
describe how these concepts were concretely implemented in the CMDragons
robot soccer team. We also show empirical results indicating the importance of
adaptation in adversarial or other unpredictable environments
Shifting pathways: managing the risks of the different access routes for sensitive data
Creators: name: Wiltshire, Deborah
Publisher: name: Zenodo
Year: 2023
Subjects: TREs, secure data access, Five Safes framework

description: Not all microdata can be anonymised without losing too much detail. For some data, once sufficient detail is removed to make it anonymous, much of its utility is lost. Therefore, pseudonymized data, data that is not fully anonymised, is increasingly made available. Under data protection legislation (GDPR), these data are considered ‘personal data’ and require appropriate safeguards. There are many positive arguments for making pseudonymized data available– they expand the scope of the research possible, contributing to vital policy-related research and allowing data to be linked together. In the post-pandemic era, their role has been even more important. Trusted Research Environments (TREs) play an integral role in enabling safe access to sensitive data. In the earlier years of secure access, Safe Rooms – secured, physical locations where researchers could access and analysis these data - were the predominant access route. The move towards easier, more flexible remote access options is a popular one with researchers but it comes with a dilemma for secure data access facilities – how to manage the differential risks of the different access routes. The 5 Safes Framework has been widely used to structure the decision-making processes in TREs. This presentation explores how it can be utilized in managing the move to new access routes, using the example of the Secure Data Center at GESIS, Germany.
Plowing for Rover Control on Extreme Slopes
Creators: name: Kohanbash, David
name: Moreland, Scott J.
name: Wettergreen, David
Publisher: name: Figshare
Year: 2018
Subjects: subject: 80101 Adaptive Agents and Intelligent Robotics
subject: FOS: Computer and information sciences

description: Planetary rovers are increasingly challenged to negotiate extreme terrain. Early destinations have been benign to preclude risk, but canyons, funnels, and newly discovered holes present steep slopes that defy tractive descent. Steep craters and holes with unconsolidated material pose a particularly treacherous danger to modern rovers. This research explores robotic braking by plowing, a novel method for decreasing slip and improving mobility while driving on steep unconsolidated slopes. This technique exploits subsurface strength that is under, not on, weak soil. Starting with experimental work on Icebreaker, a tracked rover, and concluding with detailed plow testing in a wheel test-bed the plow is developed for use. This work explores using plows of different diameters and at different depths as well as the associated braking force. By plowing the Icebreaker rover can successfully move on a slope with a high degree of accuracy thereby enabling science targets on slopes and crater walls to now be considered accessible.
On the equivalent width of the Fe K$α$ line produced by a dusty absorber in active galactic nuclei
Creators: name: Gohil, Raj
name: Ballantyne, David R.
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Obscured AGNs provide an opportunity to study the material surrounding the central engine. Geometric and physical constraints on the absorber can be deduced from the reprocessed AGN emission. In particular, the obscuring gas may reprocess the nuclear X-ray emission producing a narrow Fe K$α$ line and a Compton reflection hump. In recent years, models of the X-ray reflection from an obscuring torus have been computed; however, although the reflecting gas may be dusty, the models do not yet take into account the effects of dust on the predicted spectrum. We study this problem by analyzing two sets of models, with and without the presence of dust, using the one dimensional photo-ionization code Cloudy. The calculations are performed for a range of column densities ($22
description: accepted by MNRAS
Pose Estimation for Contact Manipulation with Manifold Particle Filters
Creators: name: Koval, Michael C.
name: Dogar, Mehmet R.
name: Pollard, Nancy
name: Siddhartha Srinivasa
Publisher: name: Figshare
Year: 2018
Subjects: subject: 80101 Adaptive Agents and Intelligent Robotics
subject: FOS: Computer and information sciences

description: We investigate the problem of estimating the state of an object during manipulation. Contact sensors provide valuable information about the object state during actions which involve persistent contact, e.g. pushing. However, contact sensing is very discriminative by nature, and therefore the set of object states which contact a sensor constitutes a lower-dimensional manifold in the state space of the object. This causes stochastic state estimation methods such as particle filters to perform poorly when contact sensors are used. We propose a new algorithm, the manifold particle filter, which uses dual particles directly sampled from the contact manifold to avoid this problem. The algorithm adapts to the probability of contact by dynamically changing the number of dual particles sampled from the manifold. We compare our algorithm to the particle filter through extensive experiments and we show that our algorithm is both faster and better at estimating the state. Our algorithm’s performance improves with increasing sensor accuracy and the filter’s update rate. We implement the algorithm on a real robot using a force/torque sensor and strain gauges to track the pose of a pushed object.
Equal-area criterion and analytical model for transient stability assessment of hybrid AC–DC transmission system using voltage sourced converter
Creators: name: Wang, Peng
name: Kuschke, Maren
name: Strunz, Kai
Publisher: name: Technische Universität Berlin
Year: 2022
Subjects: subject: 600 Technik, Medizin, angewandte Wissenschaften::620 Ingenieurwissenschaften::620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
subject: hybrid AC–DC transmission systems
subject: HVDC technology
subject: voltage sourced converter
subject: modular multilevel converter
subject: MMC
subject: HVDC

description: An analytical model for transient stability assessment of hybrid AC–DC transmission systems is formulated, implemented, and validated. The equal-area criterion, as known from the transient stability analysis of AC power systems, is redeveloped for AC–DC power systems using high-voltage direct current (HVDC) transmission based on the voltage sourced converter and in particular the modular multilevel converter (MMC). Through the proposed analytical solution, the critical clearing angle and the critical clearing time are obtained through symbolic calculations for the most severe DC and AC short-circuit faults. The assumptions made to enable the formulation of the analytical solution are conservative with respect to the assessment of transient stability. Since the analytical solution is a function of main system parameters and prefault active power flows, it offers an answer to an entire set of problems. It so yields a direct method of transient stability assessment that provides an in-depth and educational insight into the parameters influencing transient stability. As an illustrative application, the impact of scheduled power flows on DC versus AC lines on the transient stability is analysed. In the performed validation involving the comparison with a computationally more expensive numerical solution, the assumptions underlying the analytic solution were justified.
Coupling-Deformed Pointer Observables and Weak Values
Creators: name: Zhang, Yu-Xiang
name: Wu, Shengjun
name: Chen, Zeng-Bing
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: While the novel applications of weak values have recently attracted wide attention, weak measurement, the usual way to extract weak values, suffers from risky approximations and severe quantum noises. In this paper, we show that the weak-value information can be obtained exactly in strong measurement with postselections, via measuring the coupling-deformed pointer observables, i.e., the observables selected according to the coupling strength. With this approach, we keep all the advantages claimed by weak-measurement schemes and at the same time solve some widely criticized problems thereof, such as the questionable universality, systematical bias, and drastic inefficiency.
description: 8 pages, 2 figure, accepted by Phys. Rev. A
title: Capabilities of Humans for Vehicle Guidance
Creators: name: Abendroth, Bettina
name: Bruder, Ralph
Publisher: name: Springer
Year: 2023

description: Human information processing systems, as well as the individual driver characteristics interacting reciprocally with them, are particularly significant for the task of vehicle guidance. This chapter will describe these connections between driver, vehicle and environment using a simple system model. The driver’s intake, processing and output of information will be delineated. The relevant driver characteristics, capacities and skills for vehicle guidance will be described. Based on this understanding, requirements for vehicle guidance with regards to the driver will be systematized by considering subtasks and evaluated with respect to the limits of human capacity.
Precomputing interactive dynamic deformable scenes
Creators: name: James, Doug
name: Kayvon  Fatahalian
Publisher: name: Figshare
Year: 2018
Subjects: subject: 80101 Adaptive Agents and Intelligent Robotics
subject: FOS: Computer and information sciences

description: Abstract: "We present an approach for precomputing data-driven models of interactive physically based deformable scenes. The method permits real-time hardware synthesis of nonlinear deformation dynamics, including self-contact and global illumination effects, and supports real-time user interaction. We use data-driven tabulation of the system's deterministic state space dynamics, and model reduction to build efficient low-rank parameterizations of the deformed shapes. To support runtime interaction, we also tabulate impulse response functions for a palette of external excitations. Although our approach simulates particular systems under very particular interaction conditions, it has several advantages. First, parameterizing all possible scene deformations enables us to precompute novel reduced coparameterizations of global scene illumination for low-frequency lighting conditions. Second, because the deformation dynamics are precomputed and parameterized as a whole, collisions are resolved within the scene during precomputation so that runtime self-collision handling is implicit. Optionally, the data-driven models can be synthesized on programmable graphics hardware, leaving only the low-dimensional state space dynamics and appearance data models to be computed by the main CPU."
title: Creating a safe place to sleep : an analysis of night care staff interventions to reduce evening and night-time disturbance in a residential care unit
Creators: name: Conlon, Margaret
Publisher: name: Strathprints - University of Strathclyde
Year: 2005

description: Behaviours and internal constructions regarding the meaning and purpose of sleep are established very early in the infant’s life and continue through adolescence to adulthood. A sensitive and attuned caregiver will initiate interaction and be responsive to the infant’s needs. It is within this relationship that the child learns to regulate his or her own feelings and behaviours (Sadeh, 2001).
Triviality of $ϕ^4_4$ in the broken phase revisited
Creators: name: Korzec, Tomasz
name: Wolff, Ulli
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We define a finite size renormalization scheme for $ϕ^4$ theory which in the thermodynamic limit reduces to the standard scheme used in the broken phase. We use it to re-investigate the question of triviality for the four dimensional infinite bare coupling (Ising) limit. The relevant observables all rely on two-point functions and are very suitable for a precise estimation with the worm algorithm. This contribution updates an earlier publication by analysing a much larger dataset.
description: 6 pages, 2 figures, 1 table, presented at the 32nd International Symposium on Lattice Field Theory (Lattice 2014), June 23-28 2014, New York, USA
Multi-component Ginzburg-Landau theory: microscopic derivation and examples
Creators: name: Frank, Rupert L.
name: Lemm, Marius
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: This paper consists of three parts. In part I, we microscopically derive Ginzburg--Landau (GL) theory from BCS theory for translation-invariant systems in which multiple types of superconductivity may coexist. Our motivation are unconventional superconductors. We allow the ground state of the effective gap operator $K_{T_c}+V$ to be $n$-fold degenerate and the resulting GL theory then couples $n$ order parameters. In part II, we study examples of multi-component GL theories which arise from an isotropic BCS theory. We study the cases of (a) pure $d$-wave order parameters and (b) mixed $(s+d)$-wave order parameters, in two and three dimensions. In part III, we present explicit choices of spherically symmetric interactions $V$ which produce the examples in part II. In fact, we find interactions $V$ which produce ground state sectors of $K_{T_c}+V$ of arbitrary angular momentum, for open sets of of parameter values. This is in stark contrast with Schrödinger operators $-\nabla^2+V$, for which the ground state is always non-degenerate. Along the way, we prove the following fact about Bessel functions: At its first maximum, a half-integer Bessel function is strictly larger than all other half-integer Bessel functions.
description: 57 pages, 2 tables and 1 figure. Final version to appear in Ann. H. Poincar\'e
Parameters Governing Regolith Site Work by Small Robots
Creators: name: Skonieczny, Krzysztof
name: Wettergreen, David
name: Whittaker, William
Publisher: name: Figshare
Year: 2018
Subjects: subject: 80101 Adaptive Agents and Intelligent Robotics
subject: FOS: Computer and information sciences

description: Continued exploration of the Moon and Mars will call for mobile robots that are increasingly capable in regolith; not only traversing it without getting stuck, but also manipulating and shaping it to suit mission needs. This work distinguishes issues governing performance of regolith operations, based on tasks motivated by preparatory site work for lunar outposts. Payload ratio (pound-for-pound regolith-moving capacity) of small site work robots is identified as the key parameter governing metrics such as completion time for tasks ranging from berm building to trench digging. In addition to payload ratio, driving speed also governs berm building with small robots, while soil interaction parameters including regolith cohesion and soil-tool friction dictate trench digging performance. Furthermore, 3-dimensional bucket modeling highlights cohesion and friction as risks to the viability of using the smallest proposed class of excavation robots (those with mass of 250 kg or less). For trench digging especially, machines with higher mass (500 kg or more) may be required. Results are based on parameter sensitivity analyses using REMOTE, a task-level site work simulator.
Finite Volume Evolution Galerkin Methods for the Shallow Water Equations with Dry Beds
Creators: name: Bollermann, Andreas
name: Noelle, Sebastian
name: Medvidová, Maria Lukáčová -
Publisher: name: arXiv
Year: 2015
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: We present a new Finite Volume Evolution Galerkin (FVEG) scheme for the solution of the shallow water equations (SWE) with the bottom topography as a source term. Our new scheme will be based on the FVEG methods presented in (Lukáčová, Noelle and Kraft, J. Comp. Phys. 221, 2007), but adds the possibility to handle dry boundaries. The most important aspect is to preserve the positivity of the water height. We present a general approach to ensure this for arbitrary finite volume schemes. The main idea is to limit the outgoing fluxes of a cell whenever they would create negative water height. Physically, this corresponds to the absence of fluxes in the presence of vacuum. Well-balancing is then re-established by splitting gravitational and gravity driven parts of the flux. Moreover, a new entropy fix is introduced that improves the reproduction of sonic rarefaction waves.
title: Investigating students’ views of experimental physics in German laboratory classes
Creators: name: Teichmann, Erik
name: Lewandowski, Heather J.
name: Alemani, Micol
Publisher: name: Universitätsverlag Potsdam
Year: 2022
Subjects: subject: 530 Physik

description: There is a large variety of goals instructors have for laboratory courses, with different courses focusing on different subsets of goals. An often implicit, but crucial, goal is to develop students’ attitudes, views, and expectations about experimental physics to align with practicing experimental physicists. The assessment of laboratory courses upon this one dimension of learning has been intensively studied in U.S. institutions using the Colorado Learning Attitudes about Science Survey for Experimental Physics (E-CLASS). However, there is no such an instrument available to use in Germany, and the influence of laboratory courses on students views about the nature of experimental physics is still unexplored at German-speaking institutions. Motivated by the lack of an assessment tool to investigate this goal in laboratory courses at German-speaking institutions, we present a translated version of the E-CLASS adapted to the context at German-speaking institutions. We call the German version of the E-CLASS, the GE-CLASS. We describe the translation process and the creation of an automated web-based system for instructors to assess their laboratory courses. We also present first results using GE-CLASS obtained at the University of Potsdam. A first comparison between E-CLASS and GE-CLASS results shows clear differences between University of Potsdam and U.S. students’ views and beliefs about experimental physics.
description: Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe; 1263
Spectre des systèmes intégrables quantiques et représentations linéaires
Creators: name: Hernandez, David
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Algebra (math.QA)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We review arXiv:1308.3444 and arXiv:1104.1891. The structure of the spectrum of a quantum integrable system is crucial to understand its properties. In his seminar 1971 paper, Baxter observed that the spectrum of the "ice model" has a very remarkable form involving polynomials. Then it was conjectured that analog polynomials can be used to describe the spectra of more general quantum integrable systems (arXiv:math/9810055). We discuss how these (generalized Baxter's) polynomials arise naturally in terms of representation theory. This result lead recently to the proof of the conjecture.
description: Review paper, in french. 15 pages, 4 figures
Modeling Clean Energy Transition Pathways in Developing Countries: The Case of Brazil
Creators: name: de Oliveira, Joseph Andrade Borges
Publisher: name: Zenodo
Year: 2024
Subjects: Energy modelling
policy planning
energy transition
climate change
renewable energy
OSeMOSYS
FlexTool

description: This report was produced during the EMP-LAC 24 capacity building event organized bythe Climate Compatible Growth Programme (CCG). Training was provided by instructorsfrom CCG, Universidade Federal de Juiz de Fora, and Universidade Federal Fluminense.The event received funding from CCG, the World Bank Group (WBG), and the 2050Pathways Platform.We would like to thank Fernando A. Plazas Niño, Pedro H. Peters Barbosa, CarlaCannone and the whole team from Climate Compatible Growth for their support in thedevelopment of this work.
description: As a result of the Paris Agreement, Brazil formulated its Nationally Determined Contribution (NDC) regulations, updated in 2023. It stipulates that Brazil must reduce emissions by 48% in 2025 and 53% in 2030, compared to 2005 levels (MMA,2023). In other words, by 2050, everything the country emits must be offset by carbon sequestration sources, such as forest planting, biome restoration, or other technologies. This report examines the challenges of meeting objectives in the face of increasing electricity demand and climate change. Therefore, three scenarios were evaluated using the open-source modelling system OSeMOSYS: Business-As-Usual (BAU), Implementation and Expansion of Offshore Wind Generation (EOL), and Commitment to Net Neutral Emissions by 2050 (NDC). In the BAU scenario, the consequences of maintaining the percentage composition of each energy generation technology in the energy matrix are presented. This is intended to serve as a reference for the formulation of public policies for the energy transition. The NDC scenario examines which technologies can replace polluting power generation, while the EOL scenario examines whether decarbonization can be achieved by 2050 through investment in offshore wind farms. In the third scenario, we aim to investigate the effect of offshore wind generation on the grid. This is due to its identification as a medium-term expansion candidate in the analysis conducted under the 'Ten-Year Energy Expansion Plan' (PDE, 2029). Additionally, there are ongoing projects in Brazil's environmental licensing process.
Principles of Computer System Design for Stereo Perception
Creators: name: Wagner, Michael
name: O'Hallaron, David
name: Apostolopoulos, Dimitrios
name: Urmson, Chris
Publisher: name: Figshare
Year: 2018
Subjects: subject: 80101 Adaptive Agents and Intelligent Robotics
subject: FOS: Computer and information sciences

description: This paper presents principles for designing a computer system that supports stereo perception for an autonomous,
mobile robot. These principles aid the engineer in selecting a CPU and network bus to maintain an acceptable level of
robotic capability without needlessly large performance margins, which can result in excessive system power
consumption. A series of configuration equations are presented that describe relationships between important system
parameters such as CPU clock speed, network communication latency, computer power consumption, robot response
distance, robot velocity and stereo camera parameters. Configuration equations are intended to improve the
engineer’s ability to make trade-off decisions early in the design process. An application of these principles on an
existing autonomous mobile robot, Hyperion, are presented both as an example and to outline future work.
Monitoring temporal opacity fluctuations of large structures with muon tomography : a calibration experiment using a water tower tank
Creators: name: Jourde, Kevin
name: Gibert, Dominique
name: Marteau, Jacques
name: d'Ars, Jean de Bremond
name: Gardien, Serge
name: Girerd, Claude
name: Ianigro, Jean-Christophe
Publisher: name: arXiv
Year: 2015
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: Usage of secondary cosmic muons to image the geological structures density distribution significantly developed during the past ten years. Recent applications demonstrate the method interest to monitor magma ascent and volcanic gas movements inside volcanoes. Muon radiography could be used to monitor density variations in aquifers and the critical zone in the near surface. However, the time resolution achievable by muon radiography monitoring remains poorly studied. It is biased by fluctuation sources exterior to the target, and statistically affected by the limited number of particles detected during the experiment. The present study documents these two issues within a simple and well constrained experimental context: a water tower. We use the data to discuss the influence of atmospheric variability that perturbs the signal, and propose correction formulas to extract the muon flux variations related to the water level changes. Statistical developments establish the feasibility domain of muon radiography monitoring as a function of target thickness (i.e. opacity). Objects with a thickness comprised between $\simeq$ 50 $\pm$ 30m water equivalent correspond to the best time resolution. Thinner objects have a degraded time resolution that strongly depends on the zenith angle, whereas thicker objects (like volcanoes) time resolution does not.
description: 11 pages, 9 figures. Final version published in Scientific Reports, Nature, 14 march 2016