cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Dimethyltitanocen-katalysierte intermolekulare Hydroaminierung von Alkinen : ein synthetisches Werkzeug zum gezielten Aufbau stickstoffhaltiger Strukturmotive
Creators: name: Siebeneicher, Holger
Publisher: name: Hannover : Universität
Year: 2004
Subjects: subject: Alkine
subject: Hydroaminierung
subject: Indolderivate
subject: Sonogashira-Hagihara-Reaktion
subject: Titanocenderivate
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
Introducing the Eulalia and new Polana asteroid families: re-assessing primitive asteroid families in the inner Main Belt
Creators: name: Walsh, Kevin J.
name: Delbó, Marco
name: Bottke, William F.
name: Vokrouhlický, David
name: Lauretta, Dante S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The so-called Nysa-Polana complex of asteroids is a diverse and widespread group. It appears to be two overlapping families of different asteroid taxonomies: (44) Nysa is an E-type asteroid with the lowest number in the midst of a predominantly S-type cluster and (142) Polana is a B-type asteroid near the low-albedo B- and C-type cluster. Using the data from the Wide-field Infrared Survey Explorer (WISE) mission we have re-analyzed the region around the Nysa-Polana complex in the inner Main Belt, focusing on the low-albedo population. (142) Polana does not appear to be a member of the family of low-albedo asteroids in the Nysa-Polana complex. Rather, the largest is asteroid (495) Eulalia. This asteroid has never before been linked to this complex for an important dynamical reason: it currently has a proper eccentricity slightly below the range of most of the family members. However, its orbit is very close to the 3:1 mean motion resonance with Jupiter and is in a weak secular resonance. We show that its osculating eccentricity varies widely on short timescales and the averaged value diffuses over long timescales. The diffusive orbit, low-albedo, taxonomic similarity and semimajor axis strongly suggests that despite its current proper eccentricity, (495) Eulalia could have recently been at an orbit very central to the family. Hierarchical Clustering Method tests confirm that at an eccentricity of e=0.15, (495) Eulalia could be the parent of the family. The ``Eulalia family'' was formed between 900--1500 Myr ago, and likely resulted from the breakup of a 100--160 km parent body. There is also compelling evidence for an older and more widespread primitive family in the same region of the asteroid belt parented by asteroid (142) Polana.
description: 49 pages, 22 figures, Accepted to Icarus
Selektivität der p53-Antwort auf genotoxischen Streß
Creators: name: Speidel, Daniel
Publisher: name: Hannover : Universität
Year: 2004
Subjects: subject: Apoptosis
subject: DNS-Schädigung
subject: Protein p53
subject: Regulation
subject: Zellzyklus
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: [no abstract]
Fast Star, Slow Star; Old Star, Young Star: Subgiant Rotation as a Population and Stellar Physics Diagnostic
Creators: name: van Saders, Jennifer L.
name: Pinsonneault, Marc H.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Stellar rotation is a strong function of both mass and evolutionary state. Missions such as Kepler and CoRoT provide tens of thousands of rotation periods, drawn from stellar populations that contain objects at a range of masses, ages, and evolutionary states. Given a set of reasonable starting conditions and a prescription for angular momentum loss, we address the expected range of rotation periods for cool field stellar populations. We find that cool stars fall into three distinct regimes in rotation. Rapid rotators with surface periods less than 10 days are either young low-mass main sequence (MS) stars, or higher mass subgiants which leave the MS with high rotation rates. Intermediate rotators (10-40 days) can be either cool MS dwarfs, suitable for gyrochronology, or crossing subgiants at a range of masses. Gyrochronology relations must therefore be applied cautiously, since there is an abundant population of subgiant contaminants. The slowest rotators, at periods greater than 40 days, are lower mass subgiants undergoing envelope expansion. We identify additional diagnostic uses of rotation periods. There exists a period-age relation for subgiants distinct from the MS period-age relations. There is also a period-radius relation that can be used as a constraint on the stellar radius, particularly in the interesting case of planet host stars. The high-mass/low-mass break in the rotation distribution on the MS persists onto the subgiant branch, and has potential as a diagnostic of stellar mass. Finally, this set of theoretical predictions can be compared to extensive datasets to motivate improved modeling.
description: 22 pages, 11 figures, submitted to ApJ. A short YouTube video describing the work can be found at: http://www.youtube.com/user/OSUAstronomy
title: Operando Raman Shift Replaces Current in Electrochemical Analysis of Li-ion Batteries: A Comparative Study
Creators: name: Radtke, Mariusz
name: Hess, Christian
Publisher: name: MDPI
Year: 2023

description: Li-rich and catalytically active γ-LiₓV₂O₅ (x = 1.48) was investigated as a cathode for its heterogeneous charge transfer kinetics. Using a specially designed two-electrode system lithium half cell, Butler–Volmer analysis was performed, and Raman spectra were acquired in 18 mV intervals. A direct correlation was observed between the Raman shift of the active modes Ag, Bg, Au, and Bu, and the development of the Faraday current at the working electrode. The Raman intensity and the Raman shift were implemented to replace the current in a Tafel plot used for the analysis of Butler–Volmer kinetics. Striking similarities in the charge transfer proportionality constants α were found for current and Raman-based analysis. The potential of this new method of Raman-aided electrochemical detection at the diffraction limit is discussed.
Microdroplet target synthesis for kilohertz ultrafast lasers
Creators: name: Chvykov, Pavel
name: Ongg, Wise
name: Easter, James
name: Hou, Bixue
name: Nees, John
name: Krushelnick, Karl
Publisher: name: arXiv
Year: 2012
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Optics (physics.optics)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We have developed a method for producing spatially stable micron-scale liquid targets of flexible shapes at kilohertz repetition rate for use in air and vacuum, by perturbing 5 and 30 μm diameter streams with femtosecond laser pulses and monitoring the temporal development of the perturbation. Using water, we have produced features such as 2.1 μm diameter droplet and 1.3 μm diameter neck with less than 0.3 μm shot-to-shot variation, with prospects for further reduction in size and variability. The use of such micron-scale targets can be expected to prevent conductive heat dissipation, enhance field strength for ion acceleration and allow spatially-deterministic laser-cluster experiments.
description: 3 pages, 2 figures
Lineage diversification and differentiation in mouse ureter development
Creators: name: Bohnenpoll, Tobias Eberhard
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2017
Subjects: subject: Ureter development
subject: lineage tracing
subject: hedgehog signaling
subject: retinoic acid signaling
subject: Ureterentwicklung
subject: genetische Abstammungsverfolgung
subject: Hedgehog Signalweg
subject: Retinsäure Signalweg
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: [no abstract]
Efficient Method for Quantum Number Projection and Its Application to Tetrahedral Nuclear States
Creators: name: Tagami, S.
name: Shimizu, Y. R.
name: Dudek, J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We have developed an efficient method for quantum number projection from most general HFB type mean-field states, where all the symmetries like axial symmetry, number conservation, parity and time-reversal invariance are broken. Applying the method, we have microscopically calculated, for the first time, the energy spectra based on the exotic tetrahedral deformation in $^{108,110}$Zr. The nice low-lying rotational spectra, which have all characteristic features of the molecular tetrahedral rotor, are obtained for large tetrahedral deformation, $α_{32} \gtsim 0.25$, while the spectra are of transitional nature between vibrational and rotational with rather high excitation energies for $α_{32}\approx 0.1-0.2$
description: Trivial mistakes are corrected
Übertragung von Standardmessverfahren zur Charakterisierung optischer Beschichtungen in den Bereich ultrakurzer Laserpulse
Creators: name: Starke, Kai
Publisher: name: Hannover : Universität
Year: 2004
Subjects: subject: Standardization
subject: optics characterization
subject: ultrashort pulses
subject: multiple-pulse laser-induced damage
subject: laser calorimetry
subject: reflectance measurement
subject: transmittance measurement
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: [no abstract]
title: Numerical and experimental study of co-combustion of refuse-derived fuels in a circulating fluidized bed during load change
Creators: name: Alobaid, Falah
name: Kuhn, Alexander
name: Nguyen, Nhut M.
name: Johnen, Balte
name: Peters, Jens
name: Epple, Bernd
Publisher: name: Frontiers Media S.A.
Year: 2022

description: This study presents a comprehensive dynamic process simulation model of a 1 MWth circulating fluidized bed test facility applied for lignite and refuse-derived fuel co-combustion. The developed dynamic process simulation model describes the circulating fluidized bed riser and the supplying system with a high level of detail considering heat transfer, gas-solid interaction, combustion, and fluid dynamics. The model was first tuned at two steady-state operation points and was then validated by the measured data from a long-term test campaign of the 1 MWth circulating fluidized bed test facility at various loads (60%–80% to 100%). During the load changes, the simulated pressure and temperature profiles along the combustor as well as the flue gas concentrations agree very well with the measurement data. Finally, increasing the proportion of waste-derived fuel in the co-combustion process was investigated to evaluate the flexibility of its use in power generation to further reduce CO₂ emissions.
Lightweight information integration through partial mapping and query reformulation
Creators: name: Stecher, Rodolfo
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2010
Subjects: subject: Information integration
subject: query reformulation
subject: query ranking
subject: Informationsintegration
subject: Anfragenübersetzung
subject: Anfragenrangordnung
subject: Dewey Decimal Classification::000 | Allgemeines, Wissenschaft::000 | Informatik, Wissen, Systeme::004 | Informatik

description: [no abstract]
POPSTAR Evolutionary Synthesis Models III: Photometric properties of young star clusters and mixed populations
Creators: name: García-Vargas, M. L.
name: Mollá, M.
name: Martín-Manjón, M. L.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: This is the third paper of a series reporting the results from the POPSTAR evolutionary synthesis models. The main goal of this work is to present and discuss the synthetic photometric properties of Single Stellar Populations (SSPs) resulting from our POPSTAR code. Colours in the Johnson and SDSS systems, halpha and hbeta luminosities and equivalent widths, and ionising region size, have been computed for a wide range of metallicity (Z = 0.0001 - 0.05) and age (0.1 Myr to 20 Gyr). We demonstrate the importance of the contribution of emission lines to broader-band photometry when characterising stellar populations, through the presentation of both contaminated and non-contaminated colours (in both the Johnson and SDSS systems). The tabulated colours include stellar and nebular components, in addition to line emission. The main application of these models is the determination of physical properties of a given young ionising cluster, when only photometric observations are available; for an isolated star forming region, the young star cluster models can be used, free from the contamination of any underlying background stellar population. In most cases, however, the ionising population is usually embedded in a large and complex system, and the observed photometric properties result from the combination of a young star-forming burst and the underlying older population of the host. Therefore, the second objective of this paper is to provide a grid of models useful in the interpretation of mixed regions where the separation of young and old populations is not sufficiently reliable. We describe the set of PopStar Spectral Energy Distributions, the derived colours and other photometric parameters, for mixed populations where an underlying host population is combined in different mass ratios with a recent ionising burst.
description: 28 pages, 23 figures, accepted for MNRAS
Lines on K3 quartic surfaces
Creators: name: Veniani, Davide Cesare
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2016
Subjects: subject: K3 surface
subject: quartic surface
subject: line
subject: rational double point
subject: positive characteristic
subject: elliptic fibration
subject: quasi-elliptic fibration
subject: K3-Fläche
subject: Quartikfläche
subject: Gerade
subject: rationaler Doppelpunkt
subject: positive Charakteristik
subject: elliptische Faserung
subject: quasi-elliptische Faserung
subject: Dewey Decimal Classification::500 | Naturwissenschaften::510 | Mathematik

description: [no abstract]
Existential Humanism: Processing the Fragility of Life
Creators: name: Hugh Taft-Morales
Publisher: name: Instituto de Estudos Filosóficos
Year: 2020
Subjects: Existentialism
Humanism
Life
Environment
Fragility

description: Transcript of Hugh Taft-Morales' talk. This talk was part of a series of talks, titled Vídeo Aberto, organized by the Institute for Philosophical Studies of the Faculty of Arts and Humanities of the University of Coimbra. Video recording: https://www.youtube.com/watch?v=1onaFLJ8mR0&feature=youtu.be

Vídeo Aberto: https://sites.google.com/view/videoaberto
Aconitum napellus L.
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: A. Napellus L. Cat. 11und 420. Bis 2500 m. Ssp. compactum (Rchb.) Gáyer- Hierher die Angaben des Cat. unter A. Napellus; weitere Fundorte sind: 2: Faldumalp (J.). - 3: Mayens de Saxon (Besse;); Riddes (idem); Larduzan im Val de Rechy (Pannatier);La Barma imVal des Dix,2500m (J.); Saastal:Bodmen-Almagell (A.Keller), Furggtal ob den «Kehren»,etwa2500m (Bechererund Thommen). - 4: Gerental (Zahn); Maienwang (Aubert). Forma albiflorum (Ser.) Gáyer- l: Val d'Illiez (Thomas); Salanfe (Coquoz). - 2:Sanetsch (Wolf). Forma maculatum (Ser.) Gáyer- «Wallis» (nach Gáyer in Hegi, Ill..Fl. M.-Eur., III,S.497 [1912]). Forma glaciale (Rchb.) - l: Salanfe (Coquoz); Barberine (P.). Ssp.pyramidale (Miller) Rouy et Fouc.em. Gáyer- l: Barberine (Coquoz).- 2:Rawil (P.). Ssp. Bauhini(Rchb.) Gáyer- l: La Tendaz(Coquoz).- 3:Thyon im Val d'Hérémence (Rikli).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
title: How can we meet the energy challenges of small and remote coastal communities affected by climate change in Bangladesh and globally? Keele University Institute for Sustainable Futures Discussion Paper 2
Creators: name: Moolna, Adam
name: Selim, Samiya
name: George, Sharon
name: Saha, Shantanu Kumar
name: Roberts, Carolyn
name: Bhowmik, Joy
name: Hulme, Ashley
name: George, Simon
name: Karim, Sayeda
name: Robinson, Zoe
Publisher: name: Keele University
Year: 2019

description: In Bangladesh, energy poverty in small and remote coastal communities inhibits development and exacerbates livelihood and migration pressures, social changes, and gender disparities. Climate change threatens low lying coastal areas, bringing sea level rise and increasing salinity. Cyclones and flash floods are having increasing impacts on coastal terrains, habitats, and associated livelihoods. Such challenges are faced by similar communities globally and represent significant barriers to addressing multiple UN Sustainable Development Goals (SDGs) - in particular across Small Island Developing States (SIDS). Small-scale renewables potentially offer clean and secure energy solutions that also address the broader climate change mitigation context. Yet existing efforts to address energy challenges with small-scale renewables typically perform poorly. We argue that solutions need to be tailored to specific socioeconomic contexts and use durable established technologies in economically and socially viable local business models. Long term and catastrophe-resilient renewables solutions to energy challenges will help vulnerable communities adapt to climate change. Work towards solutions that address the UN SDGs is being carried forward through approaches that are internationally translatable, especially to SIDS.
description: Keele University Institute for Sustainable Futures Discussion Paper
Classification of topological insulators and superconductors in the presence of reflection symmetry
Creators: name: Chiu, Ching-Kai
name: Yao, Hong
name: Ryu, Shinsei
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We discuss a topological classification of insulators and superconductors in the presence of both (non-spatial) discrete symmetries in the Altland-Zirnbauer classification and spatial reflection symmetry in any spatial dimensions. By using the structure of bulk Dirac Hamiltonians of minimal matrix dimensions and explicit constructions of topological invariants, we provide the complete classification, which still has the same dimensional periodicities with the original Altland-Zirnbauer classification. The classification of reflection-symmetry-protected topological insulators and superconductors depends crucially on the way reflection symmetry operation is realized. When a boundary is introduced, which is reflected into itself, these non-trivial topological insulators and superconductors support gapless modes localized at the boundary.
description: 25 pages, 3 figures, 7 tables (reference corrections in v.2)
Lithium conductivity characteristics of amorphous lithium silicate and lithium alumosilicate materials and their compaction
Creators: name: Roß, Sebastian
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2014
Subjects: subject: Lithium ion conductivity
subject: impedance spectroscopy
subject: amorphous phases
subject: Lithiumionenleitfähigkeit
subject: Impedanzspektroskopie
subject: amorphe Phasen
subject: Dewey Decimal Classification::600 | Technik::660 | Technische Chemie

description: [no abstract]
Luminescence dating of Middle and Late Pleistocene ice-marginal and alluvial depositional systems in northern Germany
Creators: name: Roskosch, Julia
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2015
Subjects: subject: Luminescence dating
subject: Middle and Late Pleistocene
subject: northern Germany
subject: Lumineszenzdatierung
subject: Mittel- und Jungpleistozän
subject: Norddeutschland
subject: Dewey Decimal Classification::500 | Naturwissenschaften::550 | Geowissenschaften

description: [no abstract]
Passively Addressed Robotic Morphing Surface (PARMS) based on machine learning
Creators: name: Chortos, Alex
name: Sotzing, Michael
name: Wang, Jue
name: Lee, Mina
Publisher: name: Zenodo
Year: 2023

description: Reconfigurable morphing surfaces provide new opportunities for advanced human-machine interfaces and bio-inspired robotics. Morphing into arbitrary surfaces on demand requires a device with a sufficiently large number of actuators and an inverse control strategy that can calculate the actuator stimulation necessary to achieve a target surface. The programmability of a morphing surface can be improved by increasing the number of independent actuators, but this increases the complexity of the control system. Thus, developing compact and efficient control interfaces and control algorithms is a crucial knowledge gap for the adoption of morphing surfaces in broad applications. In this work, we describe a passively addressed robotic morphing surface (PARMS) composed of matrix-arranged ionic actuators. To reduce the complexity of the physical control interface, we introduce passive matrix addressing. Matrix addressing allows the control of N2 independent actuators using only 2N control inputs, which is significantly lower than N2 control inputs required for traditional direct addressing. Our control algorithm is based on machine learning using finite element simulations as the training data. This machine-learning approach allows both forward and inverse control with high precision in real time. Inverse control demonstrations show that the PARMS can dynamically morph into target surfaces on demand. These innovations in actuator matrix control may enable future implementation of PARMS in wearables, haptics, and augmented reality/virtual reality (AR/VR).
description: The .m files in ML data are pre-trained ML model which should be used by Python, not Matlab. The other data files are in .txt or .csv format. Either Matlab or Python can open them.Funding provided by: Purdue University
Crossref Funder Registry ID: http://dx.doi.org/10.13039/100006377
Award Number: Startup Funding
description: The dataset include the point cloud data of every experiment in forward and inverse control and the pre-trained ML model based on simulation data. Also, it includes the raw data in single strip and system characterization. The point cloud data in .txt file can be processed by either Matlab or Python. The pre-trained ML model (they are .m files but not for Matlab) can be used by Python directly to generate the input voltage array (inverse control) or z-displacement array (forward control) The raw data of single strip actuator and system characterization are in .txt and .csv files. They can be reproduced by Matlab.
title: ‘Erotic Attitudes’ in an Epistolary Discourse (Based on Aleksandr Blok’s Correspondence with Liubov’ Mendeleeva-Blok)
Creators: name: Fedotova, Svetlana
Publisher: name: AvtobiografiЯ
Year: 2018

description: The present article proposes a study of the correspondence between Aleksandr Blok and Liubov’ Mendeleevа seen as an exchange based on a highly subjective love-erotic discourse and as an epochal phenomenon of rethinking of Eros elaborated through such a discourse. Particular attention is paid to the communicative strategies of the correspondents in their joint creation of this epistolary discourse. The study of the signatures used by Liubov’ Mendeleeva-Blok in the letters shows her role in the creation of the erotic modus of the letter exchange (through what we call ‘erotodeixis’). Finally, the article analyses how erotic attitudes in the correspondence are replaced with attitudes of philia, a love-friendship relationship.
Trade unions and community : the German working class in New York City, 1870-1900
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 1994
Subjects: Trade-unions--New York (State)--New York--History.
German Americans--Employment--New York (State)--New York--History.
Noncitizen labor--New York (State)--New York--History.
Community--New York (State)--New York--History.

description: In Trade Unions and Community Dorothee Schneider argues that German unions played a vital role in building community for German immigrants in North America. More than other organizations such as churches or regional groups, Schneider maintains, trade unions were in the best position to build community in a new, rapidly changing industrial society
title: Spatiotemporal analysis of sheet and cloud cavitation and its damage potential
Creators: name: Hatzissawidis, Grigorios
name: Kerres, Lara
name: Ludwig, Gerhard J.
name: Pelz, Peter F.
Publisher: name: IOP Publishing
Year: 2022

description: The cavitation regime has a substantial influence on the damage potential, thus it has to be considered in any specific investigation. For this purpose, we set up a test rig at the Technische Universität Darmstadt using a Circular Leading Edge hydrofoil (CLE) to analyse the damage potential of sheet and cloud cavitation. Exceeding a critical Reynolds number Re c, the cavitation regime transitions from harmless sheet cavitation to aggressive cloud cavitation. High-speed recordings of the cavitation regime are correlated with high frequency pressure data from a wall-mounted piezoelectric pressure transducer. Spatial and temporal content of the cavitating flow are captured applying proper orthogonal decomposition (POD) to the high-speed recordings. In order to determine the damage potential of the cavitation regime we apply a copper foil on the hydrofoil surface, on which plastic, crater-shaped deformations due to bubble collapses occur. Images of the surface are recorded before and after each run via two-dimensional Pit-Count microscopy. We correlate spatial modes from the cavitating flow field with the eroded surface rate from pitting tests leading to the result that cloud cavitation associated with increasing cloud size is more aggressive. A power law is identified where pitting rate increases with fourteenth power of the Reynolds number.
Lithological relevance of near-surface seismic velocity model
Creators: name: Tamiru, Genet
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2009
Subjects: subject: Near-surface seismics
subject: seismic velocity
subject: reflection
subject: tomography
subject: lithological prediction
subject: Dewey Decimal Classification::500 | Naturwissenschaften::550 | Geowissenschaften

description: [no abstract]
Stabilization of a linear nanomechanical oscillator to its ultimate thermodynamic limit
Creators: name: Gavartin, Emanuel
name: Verlot, Pierre
name: Kippenberg, Tobias J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The rapid development of micro- and nanooscillators in the past decade has led to the emergence of novel sensors that are opening new frontiers in both applied and fundamental science. The potential of these novel devices is, however, strongly limited by their increased sensitivity to external perturbations. We report a non-invasive optomechanical nano-stabilization technique and apply the method to stabilize a linear nanomechanical beam at its ultimate thermodynamic limit at room temperature. The reported ability to stabilize a mechanical oscillator to the thermodynamic limit can be extended to a variety of systems and increases the sensitivity range of nanosensors in both fundamental and applied studies.
description: 17 pages, 6 figures
Long-range interactions in the calcium dimer studied by molecular spectroscopy
Creators: name: Allard, Olivier
Publisher: name: Hannover : Universität
Year: 2004
Subjects: subject: Ca2
subject: molecular spectroscopy
subject: potential energy curves
subject: cold collisions
subject: Monte-Carlo simulation
subject: deperturbation
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
GTC OSIRIS z-band imaging of Y dwarfs
Creators: name: Lodieu, N.
name: Bejar, V. J. S.
name: Rebolo, R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The aim of the project is to contribute to the characterisation of the spectral energy distribution of the coolest brown dwarfs discovered to date, the Y dwarfs. We obtained z-band far-red imaging for six Y dwarfs and a T9+Y0 binary with the OSIRIS (Optical System for Imaging and low Resolution Integrated Spectroscopy) instrument on the 10.4-m Gran Telescopio de Canarias (GTC). We detect five of the seven known Y dwarfs in the $z$-band, infer their optical-to-infrared colours, and measure their proper motions. We find a higher dispersion in the z-J and z-H colours of Y0 dwarfs than in T dwarfs. This dispersion is found to be correlated with H-w2. The high dispersion in the optical-to-infrared colours of Y dwarfs and the possible turn-over towards bluer colours may be a consequence of the presence of sulfide clouds with different thicknesses, the depletion of alcalines, and/or gravity effects.
description: 5 pages, 4 figures, 1 tables, accepted as A&A letter
Nothing to regret: Reconciling renewable energies with human wellbeing and nature in the German Energy Transition
Creators: name: Wiehe, Julia
name: Thiele, Julia
name: Walter, Anna
name: Hashemifarzad, Ali
name: Zum Hingst, Jens
name: Haaren, Christina Von
Publisher: name: London [u.a.] : Wiley-Intersience
Year: 2020
Subjects: subject: Conservation
subject: Energy supplies
subject: Energy transitions
subject: Evaluation standard
subject: Geospatial model
subject: Human wellbeing
subject: Public participation
subject: Renewable energies
subject: Rural landscapes
subject: Energy management
subject: energy transition
subject: GIS modeling
subject: nature protection
subject: renewable energy potentials
subject: target scenario
subject: wind power
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Although the transition to energy supply through renewables (RE) is, in general, politically accepted in Germany, its progress is slowed by conflicting interests, primarily nature conservation and protesting residents. This study aims to find ways to solve these conflicts in Germany. To this end, the researchers developed a geospatial model that calculates RE potentials and vulnerabilities of nature and humans. Both data input and some evaluation standards are variables in the model. The outcomes are compared to an estimated total energy demand in 2050. Two ambitious scenarios (“no regret” and “compromise”) show that a maximum of 4% of the German territory is available to meet the energy demand. This demand can be met using PV in urban areas and wind in rural landscapes without significantly impairing nature's and people's wellbeing. Solar parks and other potentials not considered in the model are treated as a reserve, which can be included if the energy targets are not met under the assumed scenario conditions. Such reserves also provide flexibility for co-determination in public participation.
Observation of Dirac node formation and mass acquisition in a topological crystalline insulator
Creators: name: Okada, Yoshinori
name: Serbyn, Maksym
name: Lin, Hsin
name: Walkup, Daniel
name: Zhou, Wenwen
name: Dhital, Chetan
name: Neupane, Madhab
name: Xu, Suyang
name: Wang, Yung Jui
name: Sankar, R.
name: Chou, Fangcheng
name: Bansil, Arun
name: Hasan, M. Zahid
name: Wilson, Stephen D.
name: Fu, Liang
name: Madhavan, Vidya
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In the recently discovered topological crystalline insulators (TCIs), topology and crystal symmetry intertwine to create surface states with a unique set of characteristics. Among the theoretical predictions for TCIs is the possibility of imparting mass to the massless Dirac fermions by breaking crystal symmetry, as well as a Lifshitz transition with a change of Fermi surface topology. Here we report high resolution scanning tunneling microscopy studies of a TCI, Pb1-xSnxSe. We demonstrate the formation of zero mass Dirac fermions protected by crystal symmetry and the mechanism of mass generation via symmetry breaking, which constitute the defining characteristics of TCIs. In addition, we show two distinct regimes of fermiology separated by a Van-Hove singularity at the Lifshitz transition point. Our work paves the way for engineering the Dirac band gap and realizing interaction-driven topological quantum phenomena in TCIs.
Low-temperature surface passivation of crystalline silicon and its application to the rear side of solar cells
Creators: name: Dauwe, Stefan
Publisher: name: Hannover : Universität
Year: 2004
Subjects: subject: Solar cells
subject: crystalline silicon
subject: surface passivation
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: [no abstract]
Degree distribution and scaling in the Connecting Nearest Neighbors model
Creators: name: Rudolf, Boris
name: Markošová, Mária
name: Čajági, Martin
name: Tiňo, Peter
Publisher: name: arXiv
Year: 2013
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Social and Information Networks (cs.SI)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We present a detailed analysis of the Connecting Nearest Neighbors (CNN) model by Vázquez. We show that the degree distribution follows a power law, but the scaling exponent can vary with the parameter setting. Moreover, the correspondence of the growing version of the Connecting Nearest Neighbors (GCNN) model to the particular random walk model (PRW model) and recursive search model (RS model) is established.
description: 21 pages, 3 figures
Light transport in inhomogeneous scattering media : perturbation theory and biomedical application
Creators: name: Ostermeyer, Martin
Publisher: name: Hannover : Universität Hannover
Year: 1999
Subjects: subject: tissue optics
subject: perturbation theory
subject: brain hematoma
subject: Dewey Decimal Classification::600 | Technik::610 | Medizin, Gesundheit
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: [no abstract]
High-yield parallel fabrication of quantum-dot monolayer single-electron devices displaying Coulomb staircase, contacted by graphene
Creators: name: Fruhman, Joel M.
name: Astier, Hippolyte P.A.G.
name: Ehrler, Bruno
name: Böhm, Marcus L.
name: Eyre, Lissa F. L.
name: Kidambi, Piran R.
name: Sassi, Ugo
name: De Fazio, Domenico
name: Griffiths, Jonathan P.
name: Robson, Alexander J.
name: Robinson, Benjamin J.
name: Hofmann, Stephan
name: Ferrari, Andrea C.
name: Ford, Christopher J. B.
Publisher: name: Apollo - University of Cambridge Repository
Year: 2021
Subjects: Article
/639/925/918/1052
/639/925/927/998
/639/925/357/341
/120
/123
/128
/147
/147/3
/147/28
/147/143
/142
/142/126
/141
article

description: Abstract: It is challenging for conventional top-down lithography to fabricate reproducible devices very close to atomic dimensions, whereas identical molecules and very similar nanoparticles can be made bottom-up in large quantities, and can be self-assembled on surfaces. The challenge is to fabricate electrical contacts to many such small objects at the same time, so that nanocrystals and molecules can be incorporated into conventional integrated circuits. Here, we report a scalable method for contacting a self-assembled monolayer of nanoparticles with a single layer of graphene. This produces single-electron effects, in the form of a Coulomb staircase, with a yield of 87 ± 13% in device areas ranging from < 800 nm2 to 16 μm2, containing up to 650,000 nanoparticles. Our technique offers scalable assembly of ultra-high densities of functional particles or molecules that could be used in electronic integrated circuits, as memories, switches, sensors or thermoelectric generators.
title: Considerations for Upright Particle Therapy Patient Positioning and Associated Image Guidance
Creators: name: Volz, Lennart
name: Sheng, Yinxiangzi
name: Durante, Marco
name: Graeff, Christian
Publisher: name: Frontiers Media S.A.
Year: 2022

description: Particle therapy is a rapidly growing field in cancer therapy. Worldwide, over 100 centers are in operation, and more are currently in construction phase. The interest in particle therapy is founded in the superior target dose conformity and healthy tissue sparing achievable through the particles’ inverse depth dose profile. This physical advantage is, however, opposed by increased complexity and cost of particle therapy facilities. Particle therapy, especially with heavier ions, requires large and costly equipment to accelerate the particles to the desired treatment energy and steer the beam to the patient. A significant portion of the cost for a treatment facility is attributed to the gantry, used to enable different beam angles around the patient for optimal healthy tissue sparing. Instead of a gantry, a rotating chair positioning system paired with a fixed horizontal beam line presents a suitable cost-efficient alternative. Chair systems have been used already at the advent of particle therapy, but were soon dismissed due to increased setup uncertainty associated with the upright position stemming from the lack of dedicated image guidance systems. Recently, treatment chairs gained renewed interest due to the improvement in beam delivery, commercial availability of vertical patient CT imaging and improved image guidance systems to mitigate the problem of anatomical motion in seated treatments. In this review, economical and clinical reasons for an upright patient positioning system are discussed. Existing designs targeted for particle therapy are reviewed, and conclusions are drawn on the design and construction of chair systems and associated image guidance. Finally, the different aspects from literature are channeled into recommendations for potential upright treatment layouts, both for retrofitting and new facilities.
Low energy Langmuir cavitons: asymptotic limit of weak turbulence
Creators: name: Henri, P.
name: Califano, F.
name: Briand, C.
name: Mangeney, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Pattern Formation and Solitons (nlin.PS)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Langmuir turbulence is an archetype of wave turbulence in plasma physics. By means of 1D-1V Vlasov-Poisson simulations, we show that coherent structures, called Langmuir cavitons, are generated by the long time evolution of Langmuir weak turbulence, thus illustrating the breakdown of a weak turbulence regime. These structures correspond to an equilibrium between the pressure forces and the ponderomotive force resulting from high frequency Langmuir oscillations. Langmuir cavitons are typical features of strong Langmuir turbulence expected to be generated at high energy and to saturate when Langmuir energy is of the order of the plasma thermal energy. Despite this wide-spread belief, here we observe that cavitons, emerging from weak Langmuir turbulence evolution, saturate at much lower energies. We show that these Langmuir coherent structures are characterized by a much larger length scale with respect to the Debye length. This gives evidence that "large" and "shallow" stable cavitons should be seen in space plasma observations. The transition toward strong turbulence is shown to be a consequence of an initial weak turbulent inverse cascade. Finally, the effective equation of state for ion acoustic oscillations is tested numerically from the kinetic model.
description: 8 pages, 5 figures
Revisiting Forest Effects on Winter Air Temperature and Wind Spee : New Open Data and Transfer Functions
Creators: name: Klein, Michael
name: Garvelmann, Jakob
name: Förster, Kristian
Publisher: name: Basel, Switzerland : MDPI AG
Year: 2021
Subjects: subject: winter forest meteorology
subject: microclimate observations
subject: air temperature
subject: wind speed
subject: transfer functions
subject: modeling
subject: open dataset
subject: Dewey Decimal Classification::500 | Naturwissenschaften::550 | Geowissenschaften

description: The diurnal cycle of both air temperature and wind speed is characterized by considerable differences, when comparing open site conditions to forests. In the course of this article, a new two-hourly, open-source dataset, covering a high spatial and temporal variability, is presented and analyzed. It contains air temperature measurements (128 station pairs (open/forest); six winter seasons; six study sites), wind speed measurements (64 station pairs; three winter seasons, four study sites) and related metadata in central Europe. Daily cycles of air temperature and wind speed, as well as further dependencies of the effective Leaf Area Index (effective LAI), the exposure in the context of forest effects, and the distance to the forest edge, are illustrated in this paper. The forest effects on air temperature can be seen particularly with increasing canopy density, in southern exposures, and in the late winter season, while wind speed depends on multiple factors such as effective LAI or the distance to the forest edge. New transfer functions, developed using linear and non-linear regression analysis, in a leave-one-out cross-validation, improve certain efficiency criteria (NSME; r2; RMSE; MAE) compared to existing transfer functions. The dataset enables multiple purposes and capabilities due to its diversity and sample size.
Redeeming Bad Theories
Creators: name: Yaakov, Itamar
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We give a Seiberg-like dual description of the interacting superconformal infrared fixed point of $\mathcal{N}=4$ gauge theory in three dimensions with vanishing Chern Simons level and $N_c\le N_f<2N_c$ fundamental flavors. These theories are known as "bad" theories due to the existence of unitarity violating monopole operators. We show that, in a dual description, all such operators are realized by free fields and the remainder theory is the Seiberg-like dual previously identified using the type IIB brane construction.
Periodic Variations in the O-C Diagrams of Five Pulsation Frequencies of the DB White Dwarf EC 20058-5234
Creators: name: Dalessio, James
name: Sullivan, Denis
name: Provencal, Judi
name: Shipman, Harry
name: Sullivan, Tiri
name: Kilkenny, Dave
name: Fraga, Luciano
name: Sefako, Ramotholo
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Variations in the pulsation arrival time of five independent pulsation frequencies of the DB white dwarf EC 20058-5234 individually imitate the effects of reflex motion induced by a planet or companion but are inconsistent when considered in unison. The pulsation frequencies vary periodically in a 12.9 year cycle and undergo secular changes that are inconsistent with simple neutrino plus photon-cooling models. The magnitude of the periodic and secular variations increases with the period of the pulsations, possibly hinting that the corresponding physical mechanism is located near the surface of the star. The phase of the periodic variations appears coupled to the sign of the secular variations. The standards for pulsation-timing-based detection of planetary companions around pulsating white dwarfs, and possibly other variables such as subdwarf B stars, should be re-evaluated. The physical mechanism responsible for this surprising result may involve a redistribution of angular momentum or a magnetic cycle. Additionally, variations in a supposed combination frequency are shown to match the sum of the variations of the parent frequencies to remarkable precision, an expected but unprecedented confirmation of theoretical predictions.
description: Accepted for publication in the Astrophysical Journal
Wave impact pressures on stepped revetments
Creators: name: Kerpen, Nils B.
name: Schoonees, Talia
name: Schlurmann, Torsten
Publisher: name: Basel : MDPI AG
Year: 2018
Subjects: subject: Physical model test
subject: Stepped revetment
subject: Wave impact
subject: Dewey Decimal Classification::500 | Naturwissenschaften::550 | Geowissenschaften

description: The wave impacts on horizontal and vertical step fronts of stepped revetments is investigated by means of hydraulic model tests conducted with wave spectra in a wave flume. Wave impacts on revetments with relative step heights of 0.3 < Hm0/Sh < 3.5 and a constant slope of 1:2 are analyzed with respect to (1) the probability distribution of the impacts, (2) the time evolution of impacts including a classification of load cases, and (3) a special distribution of the position of the maximum impact. The validity of the approved log-normal probability distribution for the largest wave impacts is experimentally verified for stepped revetments. The wave impact properties for stepped revetments are compared with those of vertical seawalls, showing that their impact rising times are within the same range. The impact duration for stepped revetments is shorter and decreases with increasing step height. Maximum horizontal wave impact loads are about two times larger than the corresponding maximum vertical wave impact loads. Horizontal and vertical impact loads increase with a decreasing step height. Data are compared with findings from literature for stepped revetments and vertical walls. A prediction formula is provided to calculate the maximum horizontal wave impact at stepped revetments along its vertical axis.
Reconfiguration Strategies for Online Hardware Multitasking in Embedded Systems
Creators: name: Sanchez-Elez, Marcos
name: Roman, Sara
Publisher: name: arXiv
Year: 2013
Subjects: subject: Hardware Architecture (cs.AR)
subject: FOS: Computer and information sciences

description: An intensive use of reconfigurable hardware is expected in future embedded systems. This means that the system has to decide which tasks are more suitable for hardware execution. In order to make an efficient use of the FPGA it is convenient to choose one that allows hardware multitasking, which is implemented by using partial dynamic reconfiguration. One of the challenges for hardware multitasking in embedded systems is the online management of the only reconfiguration port of present FPGA devices. This paper presents different online reconfiguration scheduling strategies which assign the reconfiguration interface resource using different criteria: workload distribution or task deadline. The online scheduling strategies presented take efficient and fast decisions based on the information available at each moment. Experiments have been made in order to analyze the performance and convenience of these reconfiguration strategies.
description: Computer Science & Engineering: An International Journal (CSEIJ), Vol.2, No.6, December 2012
title: Künstlerinnen im 18. Jahrhundert. Eine soziologische Skizze
Creators: name: Hinz, Berthold
Publisher: name: University Library Heidelberg
Year: 2016

description: kritische berichte - Zeitschrift für Kunst- und Kulturwissenschaften, Bd. 20, Nr. 4 (1992): kritische berichte, Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4