cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Wahrscheinlichkeitsbasierte Methoden zur autonomen Führung von Fahrzeugen in unsicherer Umgebung
Creators: name: Blume, Holger
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2008
Subjects: subject: Lokalisation
subject: Objektverfolgung
subject: wahrscheinlichkeitsbasierte Bahnplanung
subject: reaktive Bahnplanung
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: [no abstract]
Strukturaufklärung und Totalsynthese von Thuggacin A
Creators: name: Bock, Martin
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2008
Subjects: subject: Strukturaufklärung
subject: Totalsynthese
subject: Tuberkulose
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
Spatial dynamics of tuned and mistuned bladed disks with cylindrical and wedge-shaped friction dampers
Creators: name: Panning, Lars
name: Sextro, Walter
name: Popp, Karl
Publisher: name: London : Hindawi Limited
Year: 2003
Subjects: subject: Physics
subject: Control engineering
subject: Damper
subject: Vibration
subject: Cylinder
subject: Mistuning
subject: Centrifugal force
subject: Discretization
subject: Classical mechanics
subject: Wedge (mechanical device)
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: One of the main tasks in the design of turbomachines like turbines, compressors, and fans is to increase the reliability and efficiency of the arrangement. Failures due to blade cracks are still a problem and have to be minimized with respect to costs and safety aspects. To reduce the maximum stresses, the blades can be coupled via friction damping devices such as underplatform dampers that are pressed onto the blade platforms by centrifugal forces. In this work, a method will be presented to optimize two different types of underplatform dampers in bladed disk applications with respect to a maximum damping effect. In practice, underplatform dampers with various geometric properties—cylindrical and wedge-shaped—are commonly used and lead to different contact conditions. A discretization of the contact areas between the blade platforms and the dampers is applied to be able to investigate nearly arbitrary contact geometries and spatial blade vibrations. The functionality of the two mentioned damper types has been studied in detail under different working conditions of the assembly. The advantages and disadvantages of both damper types are pointed out and strategies are presented to improve the damper design. In this context, the influence of mistuning effects is discussed in terms of statistical mistuning of the blades’ natural frequencies due to manufacturing tolerances as well as systematical mistuning due to a deliberate slight variation of the blade masses or geometries.
The Ginzburg-Landau theory of flat band superconductors with quantum metric
Creators: name: Chen, Shuai A.
name: Law, K. T.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Recent experimental study unveiled highly unconventional phenomena in the superconducting twisted bilayer graphene (TBG) with ultra flat bands, which cannot be described by the conventional BCS theory. For example, given the small Fermi velocity of the flat bands, the superconducting coherence length predicted by BCS theory is more than 20 times shorter than the measured values. A new theory is needed to understand many of the unconventional properties of flat band superconductors. In this work, we establish a Ginzburg-Landau (GL) theory from a microscopic flat band Hamiltonian. The GL theory shows how the properties of the physical quantities such as the critical temperature, the superconducting coherence length, the upper critical field and the superfluid density are governed by the quantum metric of the Bloch states. One key conclusion is that the superconducting coherence length is not determined by the Fermi velocity but by the size of the optimally localized Wannier functions which is limited by quantum metric. Applying the theory to TBG, we calculated the superconducting coherence length and the upper critical fields. The results match the experimental ones well without fine tuning of parameters. The established GL theory provides a new and general theoretical framework for understanding flat band superconductors with quantum metric.
description: 5 pages, 1 figure, 1 table, and comments are welcome
Sandkastengespräche im Netz? Leitbilder „guter Erziehung“ in einem digitalen Elternforum
Creators: name: Gülzau, Fabian
Publisher: name: Humboldt-Universität zu Berlin
Year: 2018
Subjects: subject: Elternforen
subject: Erziehung
subject: topic models
subject: digitale Medien
subject: Familienleitbilder
subject: parenting online forum
subject: parenting
subject: digital media
subject: family-related ‘Leitbilder’
subject: 640 Hauswirtschaft und Familie

description: Der explorative Artikel leistet einen Beitrag zur Forschung um Leitbilder „guter Erziehung“, indem untersucht wird, ob gegenwärtige Ansprüche aus Politik, Wissenschaft und Ratgeberliteratur innerhalb eines großen deutschen Elternforums diskutiert werden. Als Datenmaterial dienen 58.240 Nutzerbeiträge zu einer digitalen Diskussionsplattform. Anhand dieser digitalen Daten kann nicht nur analysiert werden, welche Themen die Nutzer besprechen, sondern auch wie sie diese verhandeln. Hierzu wird mit „topic modeling“ ein innovatives Verfahren der „computational social sciences“ (CSS) mit der qualitativen Inhaltsanalyse kombiniert. Der Beitrag zeigt, dass insbesondere Expertenwissen von Nutzern aufgegriffen wird, um die eigene Erziehungspraxis zu rechtfertigen und zu reflektieren. Die Bezugnahmen sind in weiten Teilen positiv auch wenn einzelne Autoren kritisch betrachtet werden.
description: This explorative article contributes to research on models of “good parenting” by analyzing whether current demands of politics, science and advice literature are discussed in a large German parenting online forum. The data consists of 58,240 user submissions to a digital discussion board. Using this digital data, it can not only be analyzed which topics users discuss but also how they negotiate them. With “topic modeling”, an innovative approach from the computational social sciences (CSS), is combined with qualitative content analysis. The article shows that expert knowledge is picked up by users to justify and reflect on their childrearing practices. By and large, parents refer to expert knowledge in a positive manner, however, some authors are viewed rather critically.
Juniperus nana L.
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: A. nana L. Cat. 196und 427. Bis 3320 m: Oberrothorn bei Zermatt (Braun-Blanquet 1919); andere hohe Fundstellen sind: bei der Hörnlihütte ob Zermatt, gegen 3300 m (Thellung 1922); Petit Velan (Val d'Entremont), 3201 m (Guyot); Gornergrat bei Zermatt, 3130 m (Braun-Blanquet 1919). l: Dents-du-Midi, Salanfe-Seite (Beauverd); Dents Blanches (Füget); Luisin (Coquoz); Fontanabran (idem); Fenestral (idem); Col und Pic de Tanneverge (Briquet). - 2: Grand Chavalard (Garns). - 3: Penninische Kette verbreitet. - 4: Rappental (B. C. W.). Var. laxiusculaHeimerl' - 3: Bei der Cabanedu Velan (Val dEntremont), 2565 m (Oberson); Staffelalp bei Zermatt (P.); Schwarzberggletscher im Saastal (Zahn). - 4: Rhonegletscher (Zahn); Furka (idem). Var. stenoloba Farquet (var. stenolobata Farquet) - 3: Chalet d'Amont im Valsorey (F.). Forma platyphylla Wilczeket Vaccari- 3: Val d'Entremont:Chenalette (Vaccari),GlacierdeProz (Melly), Glacier du Velan (Guyot).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Wallonia’s Four Major Mining Sites. Serial Classification: an Obvious Choice?
Creators: name: Crul, Jacques
Publisher: name: ICOMOS – Hefte des Deutschen Nationalkomitees
Year: 2017

description: ICOMOS – Hefte des Deutschen Nationalkomitees, Bd. 62 (2016): ICOMOS – Hefte des Deutschen Nationalkomitees
Using Lorentz forces to control the distribution of bubbles in a vertical tube filled with liquid metal
Creators: name: Heitkam, S.
name: Tschisgale, S.
name: Krull, B.
name: Wetzel, T.
name: Baake, E.
name: Fröhlich, J.
Publisher: name: Bristol : Institute of Physics Publishing
Year: 2017
Subjects: subject: Electric fields
subject: Liquid metals
subject: Liquids
subject: Lorentz force
subject: Metals
subject: Convection patterns
subject: Cylindrical shapes
subject: Force distributions
subject: Homogeneous electric field
subject: Horizontal magnetic fields
subject: Mutual interaction
subject: Residence time
subject: Vertical tube
subject: Residence time distribution
subject: Konferenzschrift
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: In this work, a method to increase the residence time of bubbles in tubes or pipes filled with liquid metal is investigated. Imposing a horizontal electric current and a perpendicular horizontal magnetic field generates an upward-directed Lorentz force. This force can counteract gravity and cause floating of bubbles. Even with homogeneous electric fields these float in the mean but fluctuate randomly within the swarm due to mutual interactions. In the present case the cylindrical shape of the container furthermore creates inhomogeneous electric currents and an inhomogeneous force distribution resulting in a macroscopic convection pattern stirring the bubbles and further homogenising the spatial distribution of the bubbles.
The medium isn’t the message: Introducing a measure of adaptive virtual communication
Creators: name: Handke, Lisa
name: Schulte, Eva-Maria
name: Schneider, Kurt
name: Kauffeld, Simone
Publisher: name: London : Informa UK Limited
Year: 2018
Subjects: subject: Machine learning
subject: Art
subject: Artificial intelligence
subject: Social science
subject: Analysis of variance
subject: Dewey Decimal Classification::700 | Künste, Bildende Kunst allgemein

description: Media use can be considered as an integral part of virtual communication and thus of present-day human interaction. Nevertheless, research on media use and effects still largely relies on laboratory experiments, treating it as a stable input condition, rather than as a function of human appropriation. In this study, we propose a conceptualization of virtual communication as a dynamic construct dependent on media appropriation, particularly of compensatory adaptation processes. Using longitudinal data gathered from 165 individuals, nested in 34 project teams, we explore compensatory adaptation as a function of communication intensity and physical media richness and develop a continuous score of virtual communication accounting for these compensatory processes. Multilevel analyses demonstrate a significant influence of this communication measure on team performance, increasing over time. These results are discussed with regards to their implications for theories of media use and effects and their relevance for real-life communication processes.
The incompressible limit in linear anisotropic elasticity, with application to surface waves and elastostatics
Creators: name: Destrade, Michel
name: Martin, Paul A.
name: Ting, Tom C. T.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Incompressibility is established for three-dimensional and two-dimensional deformations of an anisotropic linearly elastic material, as conditions to be satisfied by the elastic compliances. These conditions make it straightforward to derive results for incompressible materials from those established for the compressible materials. As an illustration, the explicit secular equation is obtained for surface waves in incompressible monoclinic materials with the symmetry plane at x_3=0. This equation also covers the case of incompressible orthotropic materials. The displacements and stresses for surface waves are often expressed in terms of the elastic stiffnesses, which can be unbounded in the incompressible limit. An alternative formalism in terms of the elastic compliances presented recently by Ting is employed so that surface wave solutions in the incompressible limit can be obtained. A different formalism, also by Ting, is employed to study the solutions to two-dimensional elastostatic problems. In the special case of incompressible monoclinic material with the symmetry plane at x_3=0, one of the three Barnett-Lothe tensors S vanishes while the other two tensors H and L are the inverse of each other. Moreover, H and L are diagonal with the first two diagonal elements being identical. An interesting physical phenomenon deduced from this property is that there is no interpenetration of the interface crack surface in an incompressible bimaterial. When only the inplane deformation is considered, it is shown that the image force due to a line dislocation in a half-space or in a bimaterial depends only on the magnitude, not on the direction, of the Burgers vector.
Multimodal video and IMU kinematic dataset on daily life activities using affordable devices (VIDIMU)
Creators: name: Martínez-Zarzuela, Mario
name: González-Alonso, Javier
name: Antón-Rodríguez, Míriam
name: Díaz-Pernas, Francisco J.
name: Müller, Henning
name: Simón-Martínez, Cristina
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: Image and Video Processing (eess.IV)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Human activity recognition and clinical biomechanics are challenging problems in physical telerehabilitation medicine. However, most publicly available datasets on human body movements cannot be used to study both problems in an out-of-the-lab movement acquisition setting. The objective of the VIDIMU dataset is to pave the way towards affordable patient gross motor tracking solutions for daily life activities recognition and kinematic analysis. The dataset includes 13 activities registered using a commodity camera and five inertial sensors. The video recordings were acquired in 54 subjects, of which 16 also had simultaneous recordings of inertial sensors. The novelty of dataset lies in: (i) the clinical relevance of the chosen movements, (ii) the combined utilization of affordable video and custom sensors, and (iii) the implementation of state-of-the-art tools for multimodal data processing of 3D body pose tracking and motion reconstruction in a musculoskeletal model from inertial data. The validation confirms that a minimally disturbing acquisition protocol, performed according to real-life conditions can provide a comprehensive picture of human joint angles during daily life activities.
The Concept of Technical Inheritance in Operation: Analysis of the Information Flow in the Life Cycle of Smart Products
Creators: name: Demminger, Christian
name: Mozgova, Iryna
name: Quirico, Melissa
name: Uhlich, Florian
name: Denkena, Berend
name: Lachmayer, Roland
name: Nyhuis, Peter
Publisher: name: Amsterdam : Elsevier
Year: 2016
Subjects: subject: Technical Inheritance
subject: Intelligent Process Planning
subject: Condition-based Maintenance
subject: Design Evolution
subject: Genetic Code
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik

description: Industry 4.0 opens great potentials in productions technologies by establishing communication between machines and equipment as well as processes along the life cycle of products. Within the Collaborative Research Center (CRC) 653 several aspects of the design and application of communicative and intelligent systems and components are demonstrated. The CRC aims to enable smart products, so-called gentelligent components, to give feedback to the product and production processes based on inherently stored information. This work continues a series of publications regarding the development of the concept of Technical Inheritance. Here, the process of Technical Inheritance is applied to improve gentelligent components. This was realized according to the biological principle to transfer hereditary information on the basis of evolutionary mechanisms and variations of the information transfer. To provide an efficient information management throughout the life cycle of components and to transfer relevant information from the current generation of the component to the next generation a unified closed data exchange format GIML was developed. At the example of a load-sensitive magnesium wheel carrier of the racing car RP09 this approach is demonstrated: the information flows over the life cycle are analyzed, the concept of Technical Inheritance applied and its advantages discussed.
Sensitivity analysis of oxide scale influence on general carbon steels during hot forging
Creators: name: Behrens, Bernd-Arno
name: Chugreev, Alexander
name: Awiszus, Birgit
name: Graf, Marcel
name: Kawalla, Rudolf
name: Ullmann, Madlen
name: Korpala, Grzegorz
name: Wester, Hendrik
Publisher: name: Basel : MDPI AG
Year: 2018
Subjects: subject: Finite-element
subject: Hot forging
subject: Oxide scale
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Increasing product requirements have made numerical simulation into a vital tool for the time- and cost-efficient process design. In order to accurately model hot forging processes with finite, element-based numerical methods, reliable models are required, which take the material behaviour, surface phenomena of die and workpiece, and machine kinematics into account. In hot forging processes, the surface properties are strongly affected by the growth of oxide scale, which influences the material flow, friction, and product quality of the finished component. The influence of different carbon contents on material behaviour is investigated by considering three different steel grades (C15, C45, and C60). For a general description of the material behaviour, an empirical approach is used to implement mathematical functions for expressing the relationship between flow stress and dominant influence variables like alloying elements, initial microstructure, and reheating mode. The deformation behaviour of oxide scale is separately modelled for each component with parameterized flow curves. The main focus of this work lies in the consideration of different materials as well as the calculation and assignment of their material properties in dependence on current process parameters by application of subroutines. The validated model is used to carry out the influence of various oxide scale parameters, like the scale thickness and the composition, on the hot forging process. Therefore, selected parameters have been varied within a numerical sensitivity analysis. The results show a strong influence of oxide scale on the friction behaviour as well as on the material flow during hot forging. © 2018 by the authors. Licensee MDPI, Basel, Switzerland.
title: Highly refined mineral oils in cosmetics: Health risks are not to be expected according to current knowledge: BfR Opinion No 008/2018 of 27 February 2018
Creators: name: Bundesinstitut Für Risikobewertung
Publisher: name: Bundesbehörden und Einrichtungen im Geschäftsbereich des Bundesministeriums für Ernährung und Landwirtschaft (BMEL)
Year: 2018
Subjects: subject: 000

description: BfR-Stellungnahmen, vol. 2018, no. 008
Towards Quantitative Factory Life Cycle Evaluation
Creators: name: Nielsen, Lars
name: Schmidt, Christopher
name: Blume, Stefan
name: Schmidt, Matthias
name: Thiede, Sebastian
name: Nyhuis, Peter
name: Herrmann, Christoph
Publisher: name: Amsterdam : Elsevier BV
Year: 2016
Subjects: subject: Factory Life Cycle
subject: Factory Planning
subject: Life Cycle Evaluation
subject: Life Cycle Prediction
subject: Machine tools
subject: Sustainable development
subject: Building services
subject: Description model
subject: Factory planning
subject: Life cycle evaluations
subject: Life cycle model
subject: Life cycle prediction
subject: Manufacturing companies
subject: Turbulent environments
subject: Life cycle
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Manufacturing companies face the challenge of understanding and improving complex factory systems in order to stay competitive in a turbulent environment. Interrelated and overlapping life cycles of products and physical factory elements (e.g. machine tools, technical building services, building shell) are challenges to be handled in factory planning and operation. This work discusses both qualitative and quantitative factory life cycle models, analyzing addressed sustainability goals. Due to the lack of quantitative life cycle description models on higher system levels, a concept for aggregating life cycle models from shop floor up to site level is developed. The concept is consequently applied in a case study where cost curves are calculated over the factory's life span and are aggregated to support factory planning and operation. © 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license.
Self-tuning of Teachless Process Monitoring Systems with Multi-criteria Monitoring Strategy in Series Production
Creators: name: Denkena, Berend
name: Dahlmann, D.
name: Damm, J.
Publisher: name: Amsterdam : Elsevier
Year: 2014
Subjects: subject: Self-optimization
subject: process monitoring
subject: machine tool
subject: series production
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik

description: Modern monitoring systems in machine tools are able to detect process errors promptly. Still, the application of monitoring systems is restricted by the complexity of parameterization for save monitoring. In most cases, only specially trained personnel can handle this job at multi-spindle machines or turn-mill centers. The aim of the research project “Proceed” is to figure out in which extent a self-parameterization and independent optimization of monitoring systems in industrial series production can be realized. Therefore, the complete parameterization of the processing chain, consisting of the choice of signal sources, character extraction, the monitoring- and decision making strategy, shall be automated. This paper deals with the self-parameterization of a multi-criteria monitoring system based on a genetic algorithm.
Technical Inheritance: A Concept to Adapt the Evolution of Nature to Product Engineering
Creators: name: Lachmayer, Roland
name: Mozgova, Iryna
name: Reimche, Wilfried
name: Colditz, Frank
name: Mroz, Gregor
name: Gottwald, Philipp
Publisher: name: Amsterdam : Elsevier
Year: 2014
Subjects: subject: Technical Inheritance
subject: |information
subject: technical evolution
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: Nowadays the technological progress of technical products occurs according to the laws of natural selection: new technologies are replacing old ones, winners of the competition are those products that best meet the expectations of society and the requirements of the market. Therefore, using, adapting and modeling of the basic laws of the theory of biological evolution in order to study the evolutionary processes in technical systems are already many years a popular area of research. Modern technical solutions combine the ability to store and transmit information on their technical specifications and accumulated changes from generation to generation. The main research area of the Collaborative Research Centre (CRC) 653 “Gentelligent Components in Their Lifecycle” is the innovative development of smart products in which the genetic and intellectual dimensions are a combination that enables to use the accumulated product life cycle information for the development of subsequent generations adapted to their environment. One of the central questions of the evolution of technical products is how to consider inheritance and the transfer of information. Based on evolutionary mechanisms the definition of technical inheritance as a transfer of assembled and verified information from production and application to the next product generation has been composed. The authors employed the analysis of existing evolutionary theories in biology, evolutionary laws of technical systems and their adaptation as well as the redefining of gentelligent smart products.
Diskussionsbeiträge, Teil 1 / Discussion, Part 1
Creators: name: Redaktion, Die
Publisher: name: ICOMOS – Hefte des Deutschen Nationalkomitees
Year: 2017

description: ICOMOS – Hefte des Deutschen Nationalkomitees, Bd. 62 (2016): ICOMOS – Hefte des Deutschen Nationalkomitees
title: Сравнительный анализ эффективности применения алгоритмов оценки углового положения источников сверхширокополосных сигналов
Creators: name: ., А.А. Строцев – д.т.н., доцент, зам. начальника НТК по науке, ФГУП «РНИИРС» ФНПЦ А.В. Аверьянов – к.т.н., инженер-программист, ФГУП «РНИИРС» ФНПЦ
Publisher: name: Издательство Радиотехника
Year: 2019

description: Постановка проблемы. Cущественное возрастание сложностей для оценки угловых координат радиоэлектронных средств с сверхширокополосными сигналами в многоканальных корреляционных измерителях вызвали необходимость в применении алгоритмов, использующих различные упрощения. Это обстоятельство потребовало оценить их достоинства и недостатки по основным показателям. Поэтому рассмотрены алгоритмы оценки углового положения источников сверхширокополосных сигналов, реализующие работу многоканального корреляционного измерителя.
Цель. Провести сравнительный анализ алгоритмов оценки углового положения источников сверхширокополосных сигналов по показателю точности.
Результаты. Получены выражения для нижних границ среднеквадратических отклонений оценок углового положения источников сверхширокополосных сигналов многоканальным корреляционным измерителем. Проведен сравнительный анализ различных алгоритмов оценки углового положения источников сверхширокополосных сигналов многоканальным корреляционным измерителем. Анализ выполнен на основе сравнения показателей точности, полученных на основе статистического моделирования, и показателей потенциально достижимой точности.
Практическая значимость. Рассмотренные алгоритмы могут найти применение в существующих и перспективных пассивных радиотехнических системах наблюдения за объектами – источниками сверхширокополосных сигналов.
Bodendenkmalpflege und Stadtplanung im Gründungsviertel der Hansestadt Lübeck
Creators: name: Schneider, Manfred
Publisher: name: ICOMOS – Hefte des Deutschen Nationalkomitees
Year: 2017

description: ICOMOS – Hefte des Deutschen Nationalkomitees, Bd. 61 (2016): ICOMOS – Hefte des Deutschen Nationalkomitees
Dynamical criticality of magnetization transfer in integrable spin chains
Creators: name: Krajnik, Žiga
name: Schmidt, Johannes
name: Ilievski, Enej
name: Prosen, Tomaž
Publisher: name: arXiv
Year: 2023
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Recent studies have found that fluctuations of magnetization transfer in integrable spin chains violate the central limit property. Here we revisit the problem of anomalous counting statistics in the Landau-Lifshitz field theory by specializing to two distinct anomalous regimes featuring a dynamical critical point. By performing optimized numerical simulations using an integrable space-time discretization we extract the algebraic growth exponents of time-dependent cumulants which attain their threshold values. The distinctly non-Gaussian statistics of magnetization transfer in the easy-axis regime is found to converge towards the universal distribution of charged single-file systems. At the isotropic point we infer a weakly non-Gaussian distribution, corroborating the view that superdiffusive spin transport in integrable spin chains does not belong to any known dynamical universality class.
description: 4.5 pages, v2: Some rephrasing, results unchanged, v3: added coathor, reference, v4: added fluctuations in SU(3) model, v5: fixed typos, added two background references
title: Организация высокоскоростного радиоканала передачи информации с подвижных объектов
Creators: name: ., А.О. Касьянов – д.т.н., зам. руководителя НТК, ФГУП «РНИИРС» ФНПЦ А.С. Юниченко – к.т.н., руководитель группы, ФГУП «РНИИРС» ФНПЦ К.В. Суматохин – руководитель лаборатории, ФГУП «РНИИРС» ФНПЦ
Publisher: name: Издательство Радиотехника
Year: 2019

description: Постановка проблемы. Для передачи с подвижных объектов (ПО) видеопотоков высокого разрешения, геоданных и другой информации требуется радиоканал, обеспечивающий скорость передачи до 100 Мбит/с с требуемой вероятностью битовой ошибки 10−6…10−7 при нахождении ПО на расстоянии прямой видимости. Также предъявляются требования к зоне связи, скоростным характеристикам носителя, энергетическим и массогабаритным характеристикам и другим параметрам. Для организации данного радиоканала необходим алгоритм эвристического синтеза, включающий: выбор частотного диапазона и определение условий распространения радиосигнала; энергетический расчет радиоканала, включая выбор сигнально-кодовой конструкции (СКК) и определение требований к усилению антенных систем; определение используемых антенных систем и уточнение энергетических характеристик радиоканала.
Цель. Рассмотреть организацию высокоскоростного радиоканала передачи информации с ПО по векторному критерию требований (дальность и скорость передачи информации, зона связи, скоростные характеристики носителя, энергетические и массогабаритные характеристики и др.) при достижимых на данном этапе компонентах данного вектора на основе эвристического синтеза.
Результаты. Приведены основные этапы организации высокоскоростных радиоканалов передачи информации с ПО на примере эвристического синтеза радиоканала сброса данных с ПО со скоростью передачи информации до 120 Мбит/с при дальности связи до 70 км. При синтезе радиоканала для передачи полезного сигнала использованы свободные участки S диапазона (2…4 ГГц), обеспечивающие электромагнитную совместимость и приемлемые условия распространения радиосигнала. По результатам энергетического расчета в радиоканале использованы энергетически эффективные СКК с фазовой модуляцией, устойчивой к доплеровскому сдвигу и нелинейности бортового усилителя мощности. Для обеспечения зоны связи по азимуту и требуемого энергетического запаса синтезируемого радиоканала использованы следующие антенные системы: приемная гибридная зеркальная антенна с системой из нескольких облучателей для электронного сканирования пространства в азимутальной плоскости, коммутируемая бортовая антенная система направленных излучателей, а также бортовая фазированная антенная решетка.
Практическая значимость. Предложенный алгоритм эвристического синтеза радиоканала может быть использован для синтеза аналогичных высокоскоростных радиоканалов передачи информации с ПО по сформированным векторным критериям требований. Достоверность результатов синтеза подтверждена проведенными натурными испытаниями.
Oberösterreich in der Urzeit
Creators: name: Reinecke, Paul
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2017

description: Rezension zu: Kurt Willvonseder, Oberösterreich in der Urzeit. Verlag Dr. E. Stepan, Wien 1933. 109 S., 100 Abb. mit 303 Figuren und 4 Karten.
description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 18, Nr. 1 (1934)
title: Improving Prospective Teachers’ Beliefs About a Double Discontinuity Between School Mathematics and University Mathematics
Creators: name: Eichler, Andreas
name: Isaev, Viktor
Publisher: name: Universität Kassel
Year: 2022
Subjects: subject: double dicscontinuity
subject: beliefs
subject: coherence
subject: relevance
subject: utility value
subject: teacher education
subject: doppelte Diskontinuität
subject: Überzeugungen
subject: Kohärenz
subject: Relevanz
subject: Lehramtsausbildung
subject: 370
subject: 510
subject: Diskontinuität
subject: Überzeugung
subject: Kohärenz
subject: Wichtigkeit
subject: Lehramtsstudium
subject: Schulmathematik
subject: Hochschule

description: Gefördert im Rahmen des Projekts DEAL
Ein spätkaiserzeitliches Germanengrab aus dem Neuburgischen
Creators: name: Reinecke, Paul
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2017

description: [nicht erschienen / not available]
description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 18, Nr. 2 (1934)
Setting Discrete Yield-stress Sensors for Recording Early Component Loading Using Eddy-current Array Technology and Induction Thermography
Creators: name: Mroz, G.
name: Reimche, W.
name: Frackowiak, W.
name: Bruchwald, O.
name: Maier, Hans Jürgen
Publisher: name: Amsterdam : Elsevier
Year: 2014
Subjects: subject: Load sensor
subject: yield-stress sensor
subject: eddy-current technology
subject: eddy-current array-technology
subject: induction thermography
subject: Villari effect
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik

description: Problematic requirements, regarding the assessment of the integrity of highly loaded components require that modern methods be developed to record the component's loading history during its life cycle. New developments are moving towards a continuous monitoring of loading history using sensors as well as towards determing the material's or component's state during its service. This requires integrating the load sensors into the component in order to record the component's loading online. Based on the physical material properties of metastable austenitic steels, a novel design is developed for implementing local, component-inherent load sensors; so-called directionally-sensitive yield-stress sensors. The appropriate strengths and yield stresses, corresponding to the component loading to be monitored, can be specifically set by locally heat treating the selected, cold-worked sensor's region using a fibre-laser. Electromagnetic testing methods, such as eddy current technology and imaging induction thermography are developed to rapidly collect the technical data of such microstructures which possess modified physical material properties. The measuring technology is developed and adapted to the testing task via modelling. FEM computation are also performed both for describing the domain's scope and the eddy current distribution, as well as for simulating the magnetising processes as well as the chronological formation of temperature fields in the component's edge region.
On Particle Transport and Radiation Production in Sub-Larmor-Scale Electromagnetic Turbulence
Creators: name: Keenan, Brett D.
name: Medvedev, Mikhail V.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The relation of particle transport of relativistic particles in plasmas with high-amplitude isotropic sub-Larmor-scale magnetic turbulence to the spectra of radiation simultaneously produced by these particles is investigated both analytically and numerically. We have found that in the asymptotic regime of very small particle deflections the pitch angle diffusion coefficient is directly related to the spectrum of the emitted radiation. Moreover, this spectrum provides much information about the statistical properties of the underlying magnetic turbulence. The transition from small- to large-scale jitter to synchrotron radiation regimes as a function of turbulence properties has also been explored. These results can readily be used to diagnose laboratory and astrophysical plasmas.
Magnetic monopole polarons in spin ice with mixed coordination numbers
Creators: name: Chern, Gia-Wei
name: Mellado, Paula
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Emergent quasiparticles that arise from the fractionalization of the microscopic degrees of freedom have been one of the central themes in modern condensed matter physics. The notion of magnetic monopoles, freely moving quasiparticles fragmented from local dipole excitations, has enjoyed much success in understanding the thermodynamic, static, and transport properties of the so-called spin-ice materials. The artificial version of spin ice, where a lattice of nanoscale magnetic dipoles is sculpted out of a ferromagnetic film, provides a unique opportunity to study these unusual quasiparticles in a material-by-design approach. Here we show that the elementary excitations in the ice phase of a nano-magnetic array arranged in the pentagonal lattice are composite objects comprised of the emergent monopole and a surrounding cloud of opposite uncompensated magnetic charges.
description: 5 pages, 4 figures
title: Метод детализации радиолокационного изображения на основе генетического алгоритма
Creators: name: ., С.Е. Мищенко – д.т.н., профессор, вед. науч. сотрудник, ФГУП «РНИИРС» ФНПЦ В.В. Шацкий – Засл. изобретатель РФ, к.т.н., доцент, начальник бюро, ФГУП «РНИИРС» ФНПЦ Л.В. Винник – инженер-программист, ФГУП «РНИИРС» ФНПЦ А.В. Литвинов – начальник сектора, ФГУП «РНИИРС» ФНПЦ А.С. Помысов – руководитель группы, ФГУП «РНИИРС» ФНПЦ
Publisher: name: Издательство Радиотехника
Year: 2019

description: Постановка проблемы. Преодоление ограничений критерия Рэлея в цифровых антенных решетках является одной из актуальных проблем развития радиотехнических систем. Ее решение связано с получением в реальном времени детального радиолокационного изображения.
Цель. Предложить способ повышения разрешающей способности приемных цифровых антенных решеток (ЦАР) при обработке сигналов в реальном масштабе времени. Для этого рассмотрено адекватное решение задачи экстраполяции поля в раскрыве реальной антенны на раскрыв большего размера с использованием при обработке принятых ЦАР сигналов генетического алгоритма, обеспечивающего восстановление пространственного распределения источников.
Результаты. Разработан метод детализации радиолокационного изображения с использованием генетического алгоритма при обработке принятых цифровой антенной решеткой комплексных амплитуд сигналов. Метод обеспечивает восстановление пространственного распределения и непосредственное определение параметров источников излучения в результате решения задачи минимизации среднеквадратического отклонения фурье-образов принятого и моделируемого распределений комплексных амплитуд.
Практическая значимость. Работоспособность метода подтверждена результатами численного моделирования и в ходе обработки результатов эксперимента. Для рассматриваемой цифровой антенной решетки получены оценки быстродействия генетического алгоритма, на основе которого реализован предлагаемый метод.
Avian-Inspired Claws Enable Robot Perching or Walking
Creators: name: Askari, Mohammad
name: Shin, Won Dong
name: Lenherr, Damian
name: Stewart, William
name: Floreano, Dario
Publisher: name: arXiv
Year: 2023
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Multimodal UAVs (Unmanned Aerial Vehicles) are rarely capable of more than two modalities, i.e., flying and walking or flying and perching. However, being able to fly, perch, and walk could further improve their usefulness by expanding their operating envelope. For instance, an aerial robot could fly a long distance, perch in a high place to survey the surroundings, then walk to avoid obstacles that could potentially inhibit flight. Birds are capable of these three tasks, and so offer a practical example of how a robot might be developed to do the same. In this paper, we present a specialized avian-inspired claw design to enable UAVs to perch passively or walk. The key innovation is the combination of a Hoberman linkage leg with Fin Ray claw that uses the weight of the UAV to wrap the claw around a perch, or hyperextend it in the opposite direction to form a curved-up shape for stable terrestrial locomotion. Because the design uses the weight of the vehicle, the underactuated design is lightweight and low power. With the inclusion of talons, the 45g claws are capable of holding a 700g UAV to an almost 20-degree angle on a perch. In scenarios where cluttered environments impede flight and long mission times are required, such a combination of flying, perching, and walking is critical.
description: 15 pages, 12 figures
Simulation based Process Monitoring for Single Item Production without Machine External Sensors
Creators: name: Denkena, Berend
name: Fischer, Ruben
name: Euhus, Dirk
name: Neff, Thomas
Publisher: name: Amsterdam : Elsevier
Year: 2014
Subjects: subject: Process monitoring
subject: Process Simulation
subject: Signal Processing
subject: Linear Regression
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik

description: Process monitoring makes an essential contribution to process safety and workpiece quality in cutting machining processes. Conventional monitoring techniques have been successfully used to detect deviations from fault free production. In series production these techniques rely on a teach-in of confidence limits from identical previous machining. However, they fail in the context of small series or single item production since previous process data are hardly available. Therefore, an innovative “teach-free” monitoring strategy is required. In this work, a machine-integrated monitoring technique based on simulation is proposed, allowing monitoring of complete processes in single item production consisting of turning, milling and drilling.
Causal Fermions in Discrete Spacetime
Creators: name: Farrelly, Terence C.
name: Short, Anthony J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper, we consider fermionic systems in discrete spacetime evolving with a strict notion of causality, meaning they evolve unitarily and with a bounded propagation speed. First, we show that the evolution of these systems has a natural decomposition into a product of local unitaries, which also holds if we include bosons. Next, we show that causal evolution of fermions in discrete spacetime can also be viewed as the causal evolution of a lattice of qubits, meaning these systems can be viewed as quantum cellular automata. Following this, we discuss some examples of causal fermionic models in discrete spacetime that become interesting physical systems in the continuum limit: Dirac fermions in one and three spatial dimensions, Dirac fields and briefly the Thirring model. Finally, we show that the dynamics of causal fermions in discrete spacetime can be efficiently simulated on a quantum computer.
description: 16 pages, 1 figure
Sensing surface states of Bi films by magnetotransport
Creators: name: Lükermann, Daniel
name: Sologub, S.
name: Pfnür, Herbert
name: Tegenkamp, Christoph
Publisher: name: College Park, MD : American Physical Society
Year: 2011
Subjects: subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Macroscopic magnetotransport measurements at Bi films grown epitaxially on Si(111) substrates have been carried out at 10 K. The magnetoconductance curves reveal two characteristic regimes, which are assigned to magnetotransport by surface and bulk states, respectively. In contrast to bulk, backscattering, i.e., weak localization, is strongly restricted for the charge carriers in the spin-polarized surface bands, and a classical magnetoresistance behavior was found. While the surface-state conductivity was found to be as high as 4×10−4Ω−1/□, the bulk conductivity is extremely low, possibly due to quantum confinement of the bulk band structure. © 2011 American Physical Society.
title: Метод многокритериального фазового синтеза плоской передающей активной фазированной антенной решетки по требованиям к дальности действия РЛС
Creators: name: ., С.Е. Мищенко – д.т.н., профессор, вед. науч. сотрудник, ФГУП «РНИИРС» ФНПЦ А.Ю. Ларин – начальник отдела, ФГУП «РНИИРС» ФНПЦ В.В. Шацкий – Засл. изобретатель РФ, к.т.н., доцент, начальник бюро, ФГУП «РНИИРС» ФНПЦ Д.Ю. Елисеев – руководитель группы, ФГУП «РНИИРС» ФНПЦ А.В. Литвинов – начальник сектора, ФГУП «РНИИРС» ФНПЦ
Publisher: name: Издательство Радиотехника
Year: 2019

description: Постановка проблемы. При проектировании РЛС вопросы перекрытия заданной зоны обзора связаны с формированием требуемой диаграммы направленности (ДН) и реализации необходимых энергетических характеристик. Это приводит к необходимости решения задачи многокритериального синтеза активной фазированной антенной решетки (АФАР) РЛС.
Цель. Разработать метод многокритериального фазового синтеза передающей АФАР РЛС, позволяющий приблизить характеристики передающих АФАР к потенциально достижимым за счет оптимального выбора фазового распределения в раскрыве, и оценить эффективность полученного метода.
Результаты. Разработан метод многокритериального фазового синтеза передающей АФАР РЛС. При обосновании метода введены новые частные целевые функции, которые определяют: недостаточность концентрации мощности излучения и неравномерность реализуемого распределения дальности действия в пределах зоны подсветки, а также допустимый диапазон снижения коэффициента направленного действия РЛС. Показано, что поиск решения задачи синтеза может быть осуществлен при помощи генетического алгоритма путем последовательного уменьшения значений частных целевых функций в порядке их приоритетного значения. Проведены исследования работоспособности предложенного метода на примере плоской активной фазированной антенной решетки при различных значениях параметра, определяющего запас энергетики РЛС.
Практическая значимость. Предложенный метод отличается от известных тем, что вместо требований к форме ДН АФАР требования предъявляются к дальности действия РЛС в пределах зоны подсветки. Поэтому достижение оптимального решения осуществляется путем последовательной минимизации значений частных целевых функций в порядке их приоритета. Новизна предлагаемого метода заключается в определении частных целевых функций и определении предпочтений относительно значений этих функций.