cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Aerodynamic behavior of an airfoil with morphing trailing edge for wind turbine applications
Creators: name: Wolff, T.
name: Ernst, Benedikt
name: Seume, Jörg R.
Publisher: name: Bristol : IOP Publishing Ltd.
Year: 2014
Subjects: subject: Energy & Fuels
subject: Engineering, Mechanical
subject: Physics, Applied
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: The length of wind turbine rotor blades has been increased during the last decades. Higher stresses arise especially at the blade root because of the longer lever arm. One way to reduce unsteady blade-root stresses caused by turbulence, gusts, or wind shear is to actively control the lift in the blade tip region. One promising method involves airfoils with morphing trailing edges to control the lift and consequently the loads acting on the blade. In the present study, the steady and unsteady behavior of an airfoil with a morphing trailing edge is investigated. Two-dimensional Reynolds-Averaged Navier-Stokes (RANS) simulations are performed for a typical thin wind turbine airfoil with a morphing trailing edge. Steady-state simulations are used to design optimal geometry, size, and deflection angles of the morphing trailing edge. The resulting steady aerodynamic coefficients are then analyzed at different angles of attack in order to determine the effectiveness of the morphing trailing edge. In order to investigate the unsteady aerodynamic behavior of the optimal morphing trailing edge, time-resolved RANS-simulations are performed using a deformable grid. In order to analyze the phase shift between the variable trailing edge deflection and the dynamic lift coefficient, the trailing edge is deflected at four different reduced frequencies for each different angle of attack. As expected, a phase shift between the deflection and the lift occurs. While deflecting the trailing edge at angles of attack near stall, additionally an overshoot above and beyond the steady lift coefficient is observed and evaluated.
Simulation based parameterization for process monitoring of machining operations
Creators: name: Denkena, Berend
name: Koeller, M.
Publisher: name: Amsterdam : Elsevier
Year: 2013
Subjects: subject: Material remova
subject: Monitoring
subject: Simulation
subject: Batch production
subject: Machining operations
subject: Process simulations
subject: Reference parameters
subject: Simulation based approaches
subject: Virtual machine tools
subject: Computer simulation
subject: Industrial applications
subject: Industrial engineering
subject: Machine tools
subject: Process control
subject: Process monitoring
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau
subject: Dewey Decimal Classification::500 | Naturwissenschaften

description: Process monitoring can prevent machine and tool failure in metal-cutting. A successful process monitoring of cutting processes depends on reliable monitoring limits for the process. In industrial applications these limits have to be generated in a learning phase during a ramp-up process. In order to enable process monitoring for single batch production without a learning phase, this paper describes a simulation based approach for generating reference data to set process limits. As a foundation for calculation of monitoring limits a position-based process simulation has to be established. In a first step an approach of modeling material removal is evaluated to check whether it fits the application for parameterizing the process monitoring. In this context the potentials of a process simulation for calculating process limits are clarified. Additionally the quality of data generated by this kind of simulation is discussed. In a second step a method is described to implement machine properties by a virtual machine tool within a simulation of material removal. For that purpose a method to use actual data of axis position and tool within the simulation of material removal is necessary. With these data a way-based simulation of material removal can generate reference parameters for monitoring limits instead of using data from a learning phase during the ramp-up process. By using position data of a virtual machine tool a reliable source for the actual position of all axes enables the position-based simulation to perform material removal in a more accurate way.
Determination of the Contact Resistivity of Screen-printed Al Contacts Formed by Laser Contact Opening
Creators: name: Kranz, Christopher
name: Lim, Bianca
name: Baumann, Ulrike
name: Dullweber, Thorsten
Publisher: name: London : Elsevier Ltd.
Year: 2015
Subjects: subject: contact resistivity
subject: PERC solar cells
subject: Screen-printing
subject: Aluminum
subject: Crystalline materials
subject: Electric resistance
subject: Metallizing
subject: Passivation
subject: Screen printing
subject: Silicon wafers
subject: Solar cells
subject: Contact opening
subject: Contact resistivities
subject: Dielectric passivation
subject: Series resistances
subject: Specific contact resistivity
subject: Spreading resistance
subject: Transmission line methods
subject: Silicon solar cells
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Next-generation industrial PERC solar cells typically include local laser contact opening (LCO) of a dielectric passivation layer stack at the rear side and subsequent full-area aluminum screen printing and firing. In this work we carry out a variation of the rear contact pitch of p-type passivated emitter and rear (p-PERC) solar cells to determine the specific contact resistivity of the resulting line-shaped aluminium rear contacts to ρc < 5 mΩ cm2. We also use the transmission line method (TLM) to measure ρc on PERC-like test wafers and obtain a median value of 3 mΩ cm2. The determined ρc values below 5 mΩ cm2 confirm recent similar studies and contradict a former publication. The main reason for the discrepancy between the literature values is an inaccurate modelling of the bulk spreading resistance contribution to the total series resistance of PERC solar cells.
Stock-market related price determination in consideration of time dynamic cost factors
Creators: name: Nemeti, Andrea
name: Denkena, Berend
Publisher: name: Amsterdam : Elsevier
Year: 2015
Subjects: subject: Forecasting
subject: Manufacturing
subject: Pricing calculation
subject: Stock market
subject: Time dynamic costs
subject: Commerce
subject: Finance
subject: Financial markets
subject: Manufacture
subject: Stochastic systems
subject: Competitive factor
subject: Forecasting methods
subject: Prediction methods
subject: Price determination
subject: Time dynamic
subject: Tool performance
subject: Costs
subject: Konferenzschrift
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::330 | Wirtschaft

description: Providing their customers with the most accurate pricing has become one of the key competitive factors ensuring commercial success for tool and mould manufacturers. However, time dynamic costs influence the pricing calculations significantly, indeed, they are rarely taken into consideration adequately. This paper presents an approach which allows to improve conventional tool performances by developing a novel forecasting method which combines mechanisms related to the stock market with techniques of stochastic prediction methods.
Semimetal-antiferromagnetic insulator transition in graphene induced by biaxial strain
Creators: name: Lee, Sung-Hoon
name: Kim, Sungjin
name: Kim, Kinam
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report first-principles calculations on antiferromagnetic spin ordering in graphene under biaxial strain. Using hybrid functional calculations, we found that semimetallic graphene sheets undergo a transition to antiferromagnetic insulators at a biaxial strain of 7.7% and that the band gap rapidly increases after the onset of this transition before reaching 0.9 eV at a biaxial strain of 12%. We examined the competition of the antiferromagnetic spin ordering with two-dimensional Peierls distortions upon biaxial strain, and found that the preceding antiferromagnetic insulator phase impedes the Peierls insulator phase. The antiferromagnetic insulator phase is destabilized upon carrier filling but robust up to moderate carrier densities. This work indicates that biaxially strained graphene represents a noble system where the electron-electron and electron-lattice interactions compete with each other in a simple but nontrivial way.
description: 9 pages, 6 figures
Wear Behavior of MoS2 Lubricant Layers during Sheet Metal Forming
Creators: name: Behrens, Bernd-Arno
name: Maier, Hans Jürgen
name: Hübner, Sven
name: Bonk, Christian
name: Almohallami, Amer
name: Lummer, Christin
name: Schein, Patrick
name: Scheland, Hannes
name: Micke-Camuz, Moritz
Publisher: name: London : Elsevier Ltd.
Year: 2017
Subjects: subject: 3D-Laserscan measurement
subject: Dry film lubricant coatings
subject: wear behavior
subject: wear initiation
subject: Coatings
subject: Drawing (forming)
subject: Friction
subject: High strength steel
subject: Laser optics
subject: Metal forming
subject: Sheet metal
subject: Solid lubricants
subject: Thickness measurement
subject: 3D Laser scanning
subject: Carry-over effects
subject: Commercial applications
subject: Deep-drawing process
subject: Dry-film lubricant
subject: Forming parameters
subject: Ultra high strength steel
subject: Wear behaviors
subject: Wear resistance
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: The increased use of high and ultra-high strength steel and materials with a high adhesion tendency leads to higher demands regarding the wear resistance of forming tools. A promising approach addressing both challenges is to apply MoS2 dry film lubricant coating systems to the tool surface. These coatings reduce friction and the use of drawing oils and can also be used as an abherent. Once these coatings are exhausted, they can be chemically removed and reapplied. However, the tool life of the coatings cannot be predicted properly, due to their inhomogeneous wear behavior which depends on the forming parameters and differs locally. Moreover, there are carryover effects of MoS2-particles to already ablated areas. Given the unpredictability of the wear of dry film lubricant coatings, it is not possible to plan the recoating cycles appropriately and thus, the potential of these coatings for commercial applications is limited. In this research, the wear behavior of MoS2-layers in deep drawing processes was investigated on a test stand with DP800+Z coil material which ensures realistic load conditions at the draw ring radius. Firstly, the wear pattern was determined and locally different contact pressures were recorded and assigned to respective wear areas. Due to bending effects of the sheet material, there are two major areas of wear on the draw ring radius. During wear tests, the wear-dependent coating thickness during wear initiation was determined by using 3D laser scanning microscopy and the friction force was evaluated. © 2017 The Authors.
Simulation-based planning of production capacity through integrative roadmapping in the wind turbine industry
Creators: name: Denkena, Berend
name: Winter, F.
Publisher: name: Amsterdam : Elsevier
Year: 2015
Subjects: subject: Decision making
subject: Planning
subject: Simulation
subject: Gears
subject: Manufacture
subject: Wind turbines
subject: Interdisciplinary planning
subject: Manufacturing technologies
subject: Planning phase
subject: Production capacity
subject: Production strategy
subject: Software implementation
subject: Wind turbine industry
subject: Turbomachine blades
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik

description: The development and effective implementation of a production strategy requires an interdisciplinary planning of products, manufacturing technologies and factory concepts. The integrative roadmapping allows the merging of these planning areas and takes into account the occurring interactions. This article shows the concept and software implementation of the integrative roadmapping for a systematic creation of roadmaps using the example of rotor blade production in the wind turbine industry. To reduce planning time and cost the workflow in the rotor blade production has been transferred to a material flow simulation to estimate the mutual impact on the production capacity by product, technology and factory within the planning phase.
NAUTILOS D3.1 - Report and fabrication of a dissolved oxygen sensors based on fluorescence quenching
Creators: name: Enrile, Andrea
name: Mazza, Marco
name: Malardé, Damien
Publisher: name: Zenodo
Year: 2022
Subjects: www.nautilos-h2020.eu

description: Production of a new DO sensor with improved performance for the measurements of fluorescence decay in specific fluorophores, for example those whose fluorescence is dependent on oxygen concentration
title: Автобиографическая и литературная память при составлении автобиографии по заказу
Creators: name: Deotto, Patrizia
Publisher: name: AvtobiografiЯ
Year: 2013

description: Memory is an essential feature of every autobiography, being an indispensable tool to retrieve memories and reinterpret them in the present, assuring time continuity from the retriever's point of view. The article aims at providing an analysis of Zamiatin’s autobiography on request, which was used as an introduction to his collection of works published in 1929, particularly focusing on Zamiatin’s perception of the relevance of both autobiographic and literary memory in the context of the reconstruction of his identity as a writer. Although seeming to adapt his self-­image to his client’s request, Zamiatin resorts to various strategies, namely irony and literary memory, to shed light on the very essence of his personality, despite all censorial manipulation attempts. Defining himself, he highlights the most distinctive feature of his nature, i.e. a constant inclination to counter any authority seeking to restrict personal freedom.
Active tailstock for precise alignment of precision forged crankshafts during grinding
Creators: name: Denkena, Berend
name: Gümmer, Olaf
Publisher: name: Amsterdam : Elsevier
Year: 2013
Subjects: subject: Adaptive control
subject: Grinding
subject: Machine
subject: Adaptive Control
subject: Collaborative research
subject: Degree of freedom (dof)
subject: Iterative learning control
subject: Optical measurement systems
subject: Positioning accuracy
subject: Positioning system
subject: Workpiece alignment
subject: Alignment
subject: Chains
subject: Digital storage
subject: Grinding (machining)
subject: Hydraulic machinery
subject: Industrial engineering
subject: Machining
subject: Navigation systems
subject: Optical data processing
subject: Optical variables measurement
subject: Crankshafts
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Within the Collaborative Research Centre 489 at the Leibniz Universitaet Hannover a new and innovative process chain for the manufacture of crankshafts is being investigated. By burr-free and near-net-shaped precision forging the process chain can be significantly shortened. However, this new production process requires a precise workpiece alignment before the grinding process due to the characteristics of the new process chain. In this paper a new machine-integrated positioning system consisting of an optical measurement system (sensor) and an active tailstock (actuator) is presented. For the detection of positioning errors, the geometric elements of the crankshaft are measured by the machine integrated optical measurement system. An algorithm evaluates the geometry data and calculates an adjustment vector. This vector contains the correction of the eccentric and tilt error. The degree of freedom (DOF) of the pendulum stroke of the grinding machine will be used to correct the eccentric error. The tilt error of the crankshaft is corrected by a new active tailstock. This tailstock produces a counter-tilt during the grinding process. For this purpose, a dynamic drive of the tailstock center in two DOF as a function of the angular position has been realized by two new developed piezo-hydraulic linear drives (stroke 4 mm). The dynamics and positioning accuracy of the active tailstock were verified. Up to 10 Hz a positioning accuracy in the range of ±1.5 μm can be achieved by using an iterative learning control. Furthermore, active alignment tests during grinding were performed.
Pinus cembra L.
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: P. Cembra L. Cat. 405und 433. Vgl. Rikli Lit. 1909, das für die Verbreitung der Arve in der Schweiz grundlegende Werk (Wallis S.169-239; enthält sehr viele nähere Angaben überdie Verbreitungdes Baumes, auf die hier verwiesen sei); vgl. ferner de Werra Lit. 1931. Bis 2850 m. l: Cocorier (Exk. Soc. Murith.); Sex des Oranges (Coquoz); La Gueulaz (J.); Les Tseppes ob Trient (J.); Pacoteires (Marietan); bei Alesse, 1015m, ein 4m hoher Baum (Garns). - 2: Südhänge des Chavalard und Grande Garde (Garns); Bougnonnaz (Beauverd); La Seye (idem); Verouet (idem). - 3:Auf dem höchsten Gipfel der westlichen Gruppe der Aiguilles des Ecandies (zwischen dem Col des Ecandies und der Pointe des Ecandies; Val d'Arpette), an senkrechter Granitwand auf der Südwestseite, 2850m, ein etwa 100-120 cm hohes Exemplar, 1945 festgestellt und photographiert (Kleiner), Höhenrekordder Art für die Alpen; LaGiete ob LaForclaz (J.); Valsorey, heute nur noch 13 Exemplare (Guyot); auf dem Gr.St.Bernhard bei 2300m (Hospitalet) Stammstücke und Zapfen gefunden, Baum. heute ganz fehlend (Guyot); unter Cleuson (J.); Gebiet zwischendem Turtmanntal und dem vorderenVispertal:mehrfachbei Eischoll,Unterbäch, Bürchen und Zeneggen (Rikli l. c.; auch Binz, Becherer und andere), bei Eischoll, Unterbäch und Bürchen bis 1200 m herabsteigend; Zermatt: ein Baum noch bei 2498 m, zwei Bäume noch bei 2520m (Maag nach Hess Lit. 1935a); Saastal:Plattje obSaas-Fee,2585m,damals (1909) höchstes bekanntesExemplarderSchweizerAlpen (Rikli); Simplongebiet:im Nanztal (vgl. Cat.) nur lokal über 50 % vorhanden, sonst Hauptbaum hier Larix (Rikli). - 3a: «Stellt», zwischen Engeloch und Eggen, 1954 m, ein Dutzend Bäume (Becherer und Arnold 1943); östlich und nordöstlich P. 2215, westlich Eggen, je ein Baum (üdem 1943); am Glatthorn, etwa 2100m, 30-40 Stück (Becherer und Thommen 1939), hier in der Gegendvon «Tann»abwärtsbis unter 1900m steigend (Pilet, Becherer 1943); Laggintal: Hänge zwischen dem Guggeligraben und dem Weg zum Oberstafel, zwei Bäume hoch oben (Frauenfelder 1941, Becherer 1942), ferner links und rechts vom Thälibach,sowie zwei Bäume oben am Abhang des Grauhorns (Becherer 1942); Zwischbergental: unterhalb Cagrande am Fussweg nach Pianezza (Becherer 1941); oberhalb Cagrande gegen die Camozellalp, reichlich, 1850-1900m (idem 1943); oberhalb der Alp Vaira gegen den Giavinersee, vereinzelt (idem 1941). - 4: Binntal: mehrfach, aber nicht häufigund nicht waldbildend, bis2250m(Binz). Var. helvetica Clairv. - 3: Goldbiel ob Törbel, 2150m (Stebler). Forma acuminata Christ - 3: Unterrothorn bei Zermatt (Christ).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Impact of logging on Paleotropical bat assemblages: What value do secondary forests hold for biodiversity conservation? Sabah, Borneo.
Creators: name: Turner, Anthony
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Mammalia
Chiroptera
Chordata
Animalia
bats
bat

description: (Uploaded by Plazi for the Bat Literature Project) No abstract provided.
title: Автобиографизм Андрея Белого: пять измерений
Creators: name: Kling, Oleg
Publisher: name: AvtobiografiЯ
Year: 2013

description: Autobiographical elements permeate all the works by Andrei Bely. Autobiographism is surely inherent for the majority of writers, if not for all of them. But due to the versatility of Andrei Belyi’s talent, it has a peculiar position in his works. If we consider Andrei Belyi’s legacy as a whole single text, a kind of a super text, then it is possible to see that often one same autobiographical story appears in five dimensions.
Let’s take, for example, the five dimension of Aleksandr Blok and Belyi’s relationship, i.e. one of the most im-­‐ portant plots in Belyi’s mythology and about Belyi. First, the relationship with Blok and Blok’s figure appeared in letters to him(1st dimension); then a cycle of poems, dedicated to Blok (1901-1903), and a message to Blok (1908) (2nd dimension); and then goes Petersburg, a novel where the parody character of Sergei Likhutin is considered to be Blok in disguise (3rd dimension). During Blok’s life, the personality of the poet was imprinted by Belyi in articles and reviews, and after his death reports (4th dimension). Finally, Blok appears as a completely different person in Belyi’s memoirs and autobiographical prose (5th dimension).
Inclusive cross-sections for gluon production in collision of two projectiles on two targets in the BFKL approach
Creators: name: Braun, M. A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Inclusive cross-sections for gluon production in collision of two mucleons with two nucleons are studied in the BFKL approach. Various contributions include emission from the pomerons attached to the participants, from the BFKL interactions in between these pomerons and from the intermediate BKP state. The last contribution may be observable provided the growth with energy of the pomeron contribution is tamed in accordance with unitarity.
Thin-film microtransformer for high frequency power applications
Creators: name: Dinulovic, Dragan
name: Gerfer, Alexander
name: Opitz, Oliver
name: Kaiser, Matthias
name: Wurz, Marc Christopher
name: Rissing, Lutz
Publisher: name: Les Ulis : EDP Sciences
Year: 2014
Subjects: subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: This paper describes a development of a microtransformer device fabricated using thin film technology. The device is designed for higher switching frequencies beyond to 50 MHz power applications. A especially by the microtransformer is a design, which allows wide flexibility of a device by choosing a different values of an inductance and of a windings ratio. The microtransformer device is integrated on silicon substrate consisting of a closed magnetic core and six coils. Both, primary and secondary device side consist three coils. Therefore, this design allows using of a device for different switching frequencies. As a magnetic material for transformer core a permalloy NiFe45/55 was chosen.
Quivers as Calculators: Counting, Correlators and Riemann Surfaces
Creators: name: Pasukonis, Jurgis
name: Ramgoolam, Sanjaye
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Representation Theory (math.RT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The spectrum of chiral operators in supersymmetric quiver gauge theories is typically much larger in the free limit, where the superpotential terms vanish. We find that the finite N counting of operators in any free quiver theory, with a product of unitary gauge groups, can be described by associating Young diagrams and Littlewood-Richardson multiplicities to a simple modification of the quiver, which we call the split-node quiver. The large N limit leads to a surprisingly simple infinite product formula for counting gauge invariant operators, valid for any quiver with bifundamental fields. An orthogonal basis for the operators, in the finite N CFT inner product, is given in terms of quiver characters. These are constructed by inserting permutations in the split-node quivers and intepreting the resulting diagrams in terms of symmetric group matrix elements and branching coefficients. The fusion coefficients in the chiral ring - valid both in the UV and in the IR - are computed at finite N. The derivation follows simple diagrammatic moves on the quiver. The large N counting and correlators are expressed in terms of topological field theories on Riemann surfaces obtained by thickening the quiver. The TFTs are based on symmetric groups and defect observables associated with subgroups play an important role. We outline the application of the free field results to the construction of BPS operators in the case of non-zero super-potential.
description: 86 figures (84 pages + Appendices)
The thermodynamic properties of the high-pressure superconducting state in the hydrogen-rich compounds
Creators: name: Szczesniak, R.
name: Durajski, A. P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The ab initio calculations suggest that the superconducting state in CaH6 under the pressure at 150 GPa has the highest critical temperature among the examined hydrogen-rich compounds. For this reason, the relevant thermodynamic parameters of the superconducting state in CaH6 have been determined; a wide range of the Coulomb pseudopotential has been assumed: $μ^{\star}\in\left<0.1,0.3\right>$. It has been found that: (i) The critical temperature (Tc) changes in the range from 243 K to 180 K. (ii) The values of the ratio of the energy gap to the critical temperature ($R_Δ\equiv 2Δ\left(0\right)/k_{B}T_{C}$) can be found in the range from 5.42 to 5.02. (iii) The ratio of the specific heat jump ($ΔC\left(T_{C}\right)$) to the value of the specific heat in the normal state ($C^{N}\left(T_{C}\right)$), which has been represented by the symbol Rc, takes the values from 3.30 to 3.18. (iv) The ratio $R_{H}\equiv T_{C}C^{N}\left(T_{C}\right)/H^{2}_{C}\left(0\right)$, where $H_{C}\left(0\right)$ denotes the critical thermodynamic field, changes from 0.122 to 0.125. The study has brought out the expressions that correctly predict the values of the thermodynamic parameters for the superconducting state in CaH6 and for the compounds: SiH4(H2)2, Si2H6, B2H6, SiH4, GeH4, and PtH. Next, in the whole family of the hydrogen-rich compounds, the possible ranges of the values have been determined for Tc, $R_Δ$, Rc, and $R_{H}$. It has been found that the maximum value of the critical temperature can be equal to 764 K, which very well correlates with Tc for metallic hydrogen (p=2 TPa). Other parameters ($R_Δ$, Rc, and $R_{H}$) should not deviate from the predictions of the BCS theory more than the analogous parameters for CaH6.
description: 12 pages, 15 figures
Incremental data acquisition from gps-traces
Creators: name: Zhang, L.
name: Sester, Monika
Publisher: name: Göttingen : Copernicus Publications
Year: 2011
Subjects: subject: GPS data
subject: Incremental refinement
subject: Integration
subject: Road map
subject: Data acquisition
subject: Data integration
subject: Maps
subject: Roads and streets
subject: Attribute information
subject: Centerlines
subject: Incremental data
subject: Normal condition
subject: Road-maps
subject: Temporal analysis
subject: Transportation
subject: Konferenzschrift
subject: Dewey Decimal Classification::500 | Naturwissenschaften::520 | Astronomie, Kartographie

description: GPS traces can track actual time and coordinates of regular vehicles going their own business, and it is easy to scale to the entire area with an accuracy of 6 to 10 meters in normal condition. As a result, extracting road map from GPS traces could be an alternative way to traditional way of road map generation. The basic idea of this paper is to describe a process which incrementally improves existing road data with incoming new information in terms of GPS traces. In this way we consider the GPS traces as measurements which represent a "digitization" of the true road. Although the accuracy of the traces is not too high, due to the high number of measurements an improvement of the quality of the road information can be achieved. Thus, this paper presents a method for integrating GPS traces and an existing road map towards a more accurate, up-to-data and detailed road map. First we profile the existing road by a sequence of perpendicular profiles and get the road's candidate sampling traces which intersect with the profile. Then we match the potential traces with the road and finally estimate the new road centerline from its corresponding traces. In addition to the geometry of roads we also mine attribute information from GPS traces, such as number of lanes. Furthermore, we explore the benefit of an incremental acquisition by a temporal analysis of the data.
Stock market related pricing mechanisms for the tool and mould manufacturing industry
Creators: name: Denkena, Berend
name: Nemeti, Andrea
Publisher: name: Amsterdam : Elsevier
Year: 2013
Subjects: subject: Enterprise related aggregation of knowledge
subject: Prediction markets
subject: Pricing
subject: Time dynamic cost
subject: Tool and mould manufacturing industry
subject: Competitive factor
subject: Knowledge aggregation
subject: Mould manufacturing
subject: Pricing mechanism
subject: Probability of occurrence
subject: Time dynamic
subject: Time-dependent dynamics
subject: Commerce
subject: Die casting
subject: Dynamics
subject: Industrial engineering
subject: Industry
subject: Manufacture
subject: Molds
subject: Production engineering
subject: Tools
subject: Costs
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::330 | Wirtschaft

description: Tool and mould manufacturers typically prepare their quotation provide an accurate price of, for example, a die casting mould is a key competitive factor for such companies. However, particularly in the customised production area, calculating the quotations and tenders has been proven as extremely challenging and subjective matter. One main cause is that time dynamic costs are rarely taken into consideration sufficiently even though they have a major impact on the final quotation due to the large time frame between the moment of the initial quotation and the actual production start. They neglect can lead to a significant discrepancy of up to 40 percent between pre- And post-calculation and thus to a loss of the corporate added value. A novel method developed at the Institute of Production Engineering and Machine Tools (IFW), Leibniz Universität Hannover, aims to provide a framework which allows tool and mould manufacturer to prepare a more precise and reliable quotation by taking time-dependent dynamic costs into consideration. The prediction of the time dynamic costs takes place by using stock market pricing mechanisms. Subsequently, based on enterprise related knowledge aggregation, this method also accounts for the probability of occurrence of each quotation thereby minimising the discrepancy between the pre- and post-calculation.
Time-Frequency Integrals and the Stationary Phase Method in Problems of Waves Propagation from Moving Sources
Creators: name: Burlak, Gennadiy
name: Rabinovich, Vladimir
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The time-frequency integrals and the two-dimensional stationary phase method are applied to study the electromagnetic waves radiated by moving modulated sources in dispersive media. We show that such unified approach leads to explicit expressions for the field amplitudes and simple relations for the field eigenfrequencies and the retardation time that become the coupled variables. The main features of the technique are illustrated by examples of the moving source fields in the plasma and the Cherenkov radiation. It is emphasized that the deeper insight to the wave effects in dispersive case already requires the explicit formulation of the dispersive material model. As the advanced application we have considered the Doppler frequency shift in a complex single-resonant dispersive metamaterial (Lorenz) model where in some frequency ranges the negativity of the real part of the refraction index can be reached. We have demonstrated that in dispersive case the Doppler frequency shift acquires a nonlinear dependence on the modulating frequency of the radiated particle. The detailed frequency dependence of such a shift and spectral behavior of phase and group velocities (that have the opposite directions) are studied numerically.
title: How Generative AI Chatbots Responded to Questions and Fact-checks about the 2024 UK General Election
Creators: name: Simon, Felix M.
name: Fletcher, Richard
name: Nielsen, Rasmus Kleis
Publisher: name: Reuters Institute for the Study of Journalism
Year: 2024
Subjects: Generative AI, Chatbots, 2024 UK General Election, Election Information, News

description: This factsheet examines the performance of three generative AI chatbots—ChatGPT4o, Google Gemini, and Perplexity—in responding to questions and fact-checks related to the 2024 UK General Election. Analysing 300 responses to 100 election-related questions, we findthat Perplexity and ChatGPT provided answers in nearly all cases, while Google Gemini mostly refrained from answering. Perplexity outperformed ChatGPT in accuracy (83% vs. 78%) and was more consistent in providing specific sources. However, both chatbots provided answers with errors, with some responses being partially or fully incorrect. ChatGPT and Perplexity frequently provided sources in their responses, including those from well-known and trusted news organisations, authorities, and fact-checkers. Both predominantly linked to news sources in replies where they provided sources. Despite many correct responses, concerns persist about the reliability and potential risks associated with using generative AI for election information.
Demonstrating the high Voc potential of PEDOT:PSS/c-Si heterojunctions on solar cells
Creators: name: Gogolin, Ralf
name: Zielke, D.
name: Descoeudres, A.
name: Despeisse, M.
name: Ballif, C.
name: Schmidt, J.
Publisher: name: London : Elsevier Ltd.
Year: 2017
Subjects: subject: heterojunctions
subject: PEDOT:PSS
subject: solar cells
subject: Voc potential
subject: Crystalline materials
subject: Heterojunctions
subject: Passivation
subject: Silicon
subject: Silicon solar cells
subject: Silicon wafers
subject: Solar cells
subject: a-Si:H
subject: Crystalline silicon wafers
subject: Crystalline silicons
subject: Hole selective layers
subject: Layer stacks
subject: Surface passivation
subject: Conducting polymers
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::330 | Wirtschaft::333 | Boden- und Energiewirtschaft::333,7 | Natürliche Ressourcen, Energie und Umwelt

description: In this study, we demonstrate the high surface passivation quality of PEDOT:PSS/c-Si junctions for the first time on solar cell level, reaching a record high Voc value of 688 mV after full-area metallization of the PEDOT:PSS. We achieve this by combining the PEDOT:PSS hole-selective layer at the rear of the crystalline silicon wafer with a well-passivating electron-selective a-Si:H(i/n) layer stack at the front. Our results clearly prove the excellent hole selectivity of PEDOT:PSS on crystalline silicon. © 2017 The Authors. Published by Elsevier Ltd.
Chromatic effects in the 21 cm global signal from the cosmic dawn
Creators: name: Vedantham, H. K.
name: Koopmans, L. V. E.
name: de Bruyn, A. G.
name: Wijnholds, S. J.
name: Ciardi, B.
name: Brentjens, M. A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The redshifted 21 cm brightness distribution from neutral hydrogen is a promising probe into the cosmic dark ages, cosmic dawn, and re-ionization. LOFAR's Low Band Antennas (LBA) may be used in the frequency range 45 MHz to 85 MHz (30>z>16) to measure the sky averaged redshifted 21 cm brightness temperature as a function of frequency, or equivalently, cosmic redshift. These low frequencies are affected by strong Galactic foreground emission that is observed through frequency dependent ionospheric and antenna beam distortions which lead to chromatic mixing of spatial structure into spectral structure. Using simple models, we show that (i) the additional antenna temperature due to ionospheric refraction and absorption are at a \sim 1% level--- 2 to 3 orders of magnitude higher than the expected 21 cm signal, and have an approximate ν^{-2} dependence, (ii) ionospheric refraction leads to a knee-like modulation on the sky spectrum at ν\approx 4\times plasma frequency. Using more realistic simulations, we show that in the measured sky spectrum, more than 50% of the 21 cm signal variance can be lost to confusion from foregrounds and chromatic effects. We conclude that foregrounds and chromatic mixing may not be subtracted as generic functions of frequency as previously thought, but must rather be carefully modeled using additional priors and interferometric measurements.
description: 16 pages, 12 figures
Is Personalization Worth It? Notifying Blogs about a Privacy Issue Resulting from Poorly Implemented Consent Banners
Creators: name: Kriecherbauer, Theresa
name: Schwank, Richard
name: Krauss, Adrian
name: Neureither, Konstantin
name: Remme, Lian
name: Volkamer, Melanie
name: Herrmann, Dominik
Publisher: name: Association for Computing Machinery (ACM)
Year: 2024

description: Several websites integrate trackers without users’ consent. Previous
research studied whether notifying responsible website operators
about such issues is an effective measure, often with limited suc-
cess. Insights from marketing research suggest that personalizing
notification emails may be an effective means to improve reme-
diation rates, with previous research pointing in both directions.
We studied this approach using a sample of 119 German fitness
and sports blogs employing Google Analytics (GA) without user
consent: In a first step, we compare the fix rate of blog operators
that received a personalized notification tailored to their blog with
the fix rate of operators that received a generic notification. We find
that personalized notifications do neither increase remediation rate
nor operators’ response behavior. In a second step, we analyzed the
reasons not to fix mentioned in (A) the email responses and (B) a
survey sent to the blog operators. We find that they mostly center
around (I) denial that a data leak exists, (II) a lack of resources
to remedy the issue and (III) claims of specifically requiring GA.
We hypothesize that an additional reason not to fix could be the
so-called moral credentials phenomenon and sketch how to study
that in future work.
Edges as nodes - A new approach to timetable information
Creators: name: Beyersdorff, Olaf
name: Nebesov, Yevgen
Publisher: name: Wadern : Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik GmbH
Year: 2009
Subjects: subject: Earliest arrival problem
subject: Minimum number of transfers problem
subject: Time-expanded model
subject: Timetable infomation
subject: Earliest arrival
subject: Linear-time algorithms
subject: Minimum number of transfers
subject: New approaches
subject: SIMPLE algorithm
subject: Time-expanded models
subject: Time-table information
subject: Clustering algorithms
subject: Optimization
subject: Scheduling
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik::621,3 | Elektrotechnik, Elektronik

description: In this paper we suggest a new approach to timetable information by introducing the "edge-converted graph" of a timetable. Using this model we present simple algorithms that solve the earliest arrival problem (EAP) and the minimum number of transfers problem (MNTP). For constant-degree graphs this yields linear-time algorithms for EAP and MNTP which improves upon the known DIJKSTRA-based approaches. We also test the performance of our algorithms against the classical algorithms for EAP and MNTP in the time-expanded model.
title: Русские «идейные сборники» как традиция: к вопросу о жанрах общественно-политической мысли в России XIX—XX веков
Creators: name: Колеров, Модест
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2019

description: Исследуется чрезвычайно развитый в русской политической и идеологической литературе конца XIX — начала XX веков, но до сих пор описанный в научной литературе лишь однажды, жанр «направленческих», партийных, общественно-политических «идейных сборников». Наиболее яркими примерами таких сборников являются известные «Проблемы идеализма» (1902), «Вехи» (1909) и «Из глубины» (1918), но они — лишь верхняя часть айсберга целой традиции, описание которой должно начаться с определения ядра и границ жанра, институционального характера этой формы политической активности в России.
Gauge invariant method for maximum simplification of the field strength in non-Abelian Yang-Mills theories
Creators: name: Garat, Alcides
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: A new local gauge invariant method is introduced in order to maximally simplify the expression for a SU(2) non-Abelian field strength. The new tetrads introduced in previous works are going to play a fundamental role in the algorithm presented in this manuscript. Three new local gauge invariant objects are going to guide us through the process of making a field strength block diagonal. The process is also covariant. Any non-trivial isospace field strength projection will become block diagonal through this algorithm. Along with the local gauge invariant method already developed in order to diagonalize the stress-energy tensor, we have with this new local gauge invariant method to maximally simplify the field strength, a new gauge invariant method to classify Yang-Mills field theories.
description: 17 pages, no figures. arXiv admin note: substantial text overlap with arXiv:gr-qc/0602049
Calibrating LISA Pathfinder raw data into femto-g differential accelerometry
Creators: name: Vetrugno, D.
name: Karnesis, N.
Publisher: name: Bristol : Institute of Physics Publishing
Year: 2017
Subjects: subject: Physics
subject: Accelerometry
subject: Calibration experiments
subject: Differential accelerations
subject: In-flight tests
subject: LISA Pathfinder
subject: Local source
subject: Noise levels
subject: Spacecraft motion
subject: Space probes
subject: Konferenzschrift
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: LISA Pathfinder is an in-flight test of the local sources of acceleration noise in LISA. The acceleration noise level in LISA Pathfinder is measured by the residual differential acceleration Δg between the two test masses once the coupling to the spacecraft motion has been removed. The full process from raw data to Δg passes through a series of calibration experiments and different data elaboration procedure which are thoroughly used during the mission and represent the baseline for any other further investigation. © Published under licence by IOP Publishing Ltd.
Trigonometric Parallaxes of Massive Star Forming Regions: G012.88+0.48 and W33
Creators: name: Immer, K.
name: Reid, M. J.
name: Menten, K. M.
name: Brunthaler, A.
name: Dame, T. M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report trigonometric parallaxes for water masers in the G012.88+0.48 region and in the massive star forming complex W33 (containing G012.68--0.18, G012.81--0.19, G012.90--0.24, G012.90--0.26), from the Bar and Spiral Structure Legacy (BeSSeL) survey using the Very Long Baseline Array. The parallax distances to all these masers are consistent with $2.40^{+0.17}_{-0.15}$ kpc, which locates the W33 complex and G012.88+0.48 in the Scutum spiral arm. Our results show that W33 is a single star forming complex at about two-thirds the kinematic distance of 3.7 kpc. The luminosity and mass of this region, based on the kinematic distance, have therefore been overestimated by more than a factor of two. The spectral types in the star cluster in W33\,Main have to be changed by 1.5 points to later types.
description: 9 pages, 11 figures, 2 tables; accepted for publication at A&A
Two-stage permanent deactivation of the boron-oxygen-related recombination center in crystalline silicon
Creators: name: Steckenreiter, V.
name: Walter, D.C.
name: Schmidt, J.
Publisher: name: London : Elsevier Ltd.
Year: 2017
Subjects: subject: boron-oxygen defect
subject: carrier lifetime
subject: Czochralski silicon
subject: permanent deactivation
subject: Carrier lifetime
subject: Defects
subject: Degradation
subject: Exponential functions
subject: Oxygen
subject: Silicon
subject: Boron-oxygen defects
subject: Crystalline silicons
subject: Deactivation process
subject: Illumination intensity
subject: PERC solar cells
subject: Recombination centers
subject: Rate constants
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::330 | Wirtschaft::333 | Boden- und Energiewirtschaft::333,7 | Natürliche Ressourcen, Energie und Umwelt

description: We analyze the lifetime evolution during permanent deactivation of the boron-oxygen-related defect center (BO defect) in boron-doped, oxygen-rich Czochralski-grown silicon (Cz-Si). In particular, we examine the impact of the samples' states prior to the permanent deactivation process. Samples that were initially fully degraded show a two-stage deactivation process consisting of a fast and a slow deactivation component, which can be fitted by two exponential functions with their respective rate constants. For both components, we find a pronounced increase of the rate constants with illumination intensity. In addition, we observe that the rate constant describing the slow deactivation component of samples deactivated after complete degradation is identical to the rate constant determined on samples, which were deactivated immediately after annealing in darkness. In the latter case, a purely mono-exponential deactivation behavior was observed. Our study clearly demonstrates that the asymptotic deactivation behavior does not depend on the initial state of the lifetime sample. We prove that the same is valid for initially degraded and dark-annealed PERC solar cells. Hence, it is not necessary to first degrade the sample to realize a fast BO deactivation.