cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Enabling Non-Parametric Strong Lensing Models to Derive Reliable Cluster Mass Distributions. WSLAP+
Creators: name: Sendra, Irene
name: Diego, Jose M.
name: Broadhurst, Tom
name: Lazkoz, Ruth
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In the strong lensing regime non-parametric lens models struggle to achieve sufficient angular resolution for a meaningful derivation of the central cluster mass distribution. The problem lies mainly with cluster members which perturb lensed images and generate additional images, requiring high resolution modeling, even though we mainly wish to understand the relatively smooth cluster component. The required resolution is not achievable because the separation between lensed images is several times larger than the deflection angles by member galaxies, even for the deepest data. Here we bypass this limitation by incorporating a simple physical prior for member galaxies, using their observed positions and their luminosity scaled masses. This galaxy contribution is added to a relatively coarse Gaussian pixel grid for modeling the cluster mass distribution, extending our established WSLAP code (Diego et al. 2007). We test this new code with a simulation based on A1689, using the pixels belonging to multiply-lensed images and the observed member galaxies. Dealing with the cluster members this way leads to convergent solutions, without resorting to regularization, reproducing well the input cluster and substructures. We highlight the ability of this method to recover dark sub-components of the cluster, unrelated to member galaxies. Such anomalies can provide clues to the nature of invisible dark matter, but are hard to discover using parametrized models where substructures are defined by the visible data. With our increased resolution and stability we show, for the first time, that non-parametric models can be made sufficiently precise to locate multiply-lensed systems, thereby achieving fully self-consistent solutions without reliance on input systems from less objective means.
description: 12 pages, 10 figures
Enhanced Mobile Digital Video Broadcasting with Distributed Space-Time Coding
Creators: name: Liu, Ming
name: Crussière, Matthieu
name: Hélard, Maryline
name: Hélard, Jean-François
name: Nasser, Youssef
Publisher: name: arXiv
Year: 2012
Subjects: subject: Information Theory (cs.IT)
subject: Multimedia (cs.MM)
subject: FOS: Computer and information sciences

description: This paper investigates the distributed space-time (ST) coding proposals for the future Digital Video Broadcasting--Next Generation Handheld (DVB-NGH) standard. We first theoretically show that the distributed MIMO scheme is the best broadcasting scenario in terms of channel capacity. Consequently we evaluate the performance of several ST coding proposals for DVB-NGH with practical system specifications and channel conditions. Simulation results demonstrate that the 3D code is the best ST coding solution for broadcasting in the distributed MIMO scenario.
Supermassive Black Hole Binary Evolution in Axisymmetric Galaxies: the final parsec problem is not a problem
Creators: name: Khan, Fazeel
name: Holley-Bockelmann, Kelly
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: During a galaxy merger, the supermassive black hole (SMBH) in each galaxy is thought to sink to the center of the potential and form a supermassive black hole binary; this binary can eject stars via 3-body scattering, bringing the SMBHs ever closer. In a static spherical galaxy model, the binary stalls at a separation of about a parsec after ejecting all the stars in its loss cone -- this is the well-known final parsec problem. Earlier work has shown that the centrophilic orbits in triaxial galaxy models are key in refilling the loss cone at a high enough rate to prevent the black holes from stalling. However, the evolution of binary SMBHs has never been explored in axisymmetric galaxies, so it is not clear if the final parsec problem persists in these systems. Here we use a suite of direct N-body simulations to follow SMBH binary evolution in galaxy models with a range of ellipticity. For the first time, we show that mere axisymmetry can solve the final parsec problem; we find the the SMBH evolution is independent of N for an axis ratio of c/a=0.8, and that the SMBH binary separation reaches the gravitational radiation regime for c/a=0.75.
description: 5 pages, submitted to ApJ Letters. Comments welcome, and may be incorporated into the final version
Jet Sampling: Improving Event Reconstruction through Multiple Interpretations
Creators: name: Kahawala, Dilani
name: Krohn, David
name: Schwartz, Matthew D.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The classification of events involving jets as signal-like or background-like can depend strongly on the jet algorithm used and its parameters. This is partly due to the fact that standard jet algorithms yield a single partition of the particles in an event into jets, even if no particular choice stands out from the others. As an alternative, we propose that one should consider multiple interpretations of each event, generalizing the Qjets procedure to event-level analysis. With multiple interpretations, an event is no longer restricted to either satisfy cuts or not satisfy them - it can be assigned a weight between 0 and 1 based on how well it satisfies the cuts. These cut-weights can then be used to improve the discrimination power of an analysis or reduce the uncertainty on mass or cross-section measurements. For example, using this approach on a Higgs plus Z boson sample, with h->bb we find an 28% improvement in significance can be realized at the 8 TeV LHC. Through a number of other examples, we show various ways in which having multiple interpretations can be useful on the event level.
Prediction of a double-antireflection coating made solely with SiN x in a single, directional deposition step
Creators: name: Winter, Matthias
name: Holst, Hendrik
name: Altermatt, Pietro P.
Publisher: name: Amsterdam : Elsevier
Year: 2013
Subjects: subject: Air-gap modules
subject: ARC
subject: Coating
subject: Raytracing
subject: SiNx
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Silicon solar cell modules, where the EVA layer is replaced by an air gap, are able to produce the same electric power as standard modules with EVA only if their anti-reflective properties are enhanced. We propose a method to do this by exploiting the fact that, on Si surfaces textured with random pyramids, light incident from near normal angle always hits at least two pyramidal faces before being reflected back toward the sun. If these two faces are covered with an anti-reflective coating (ARC) made of one and the same material but with two different thicknesses, the coating acts as a double ARC. Such a coating can be produced by depositing the SiNx layer from an oblique angle, optimally from 14.7°. Our detailed raytracing analysis predicts that J sc can then be improved by 0.2 mA/cm2 for normal incident sunlight and AM1.5g standard illumination, and is improved for all angles within a cone with an apex angle of approximately 64°. Furthermore, the coating can be optimized for modules in vertical mounting, where a Jsc gain of 0.1 mA/cm2 is predicted for an angle of incidence of 40°.
Numerical simulations of granular dynamics. I. Hard-sphere discrete element method and tests
Creators: name: Richardson, Derek C.
name: Walsh, Kevin J.
name: Murdoch, Naomi
name: Michel, Patrick
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: We present a new particle-based (discrete element) numerical method for the simulation of granular dynamics, with application to motions of particles on small solar system body and planetary surfaces. The method employs the parallel N-body tree code pkdgrav to search for collisions and compute particle trajectories. Collisions are treated as instantaneous point-contact events between rigid spheres. Particle confinement is achieved by combining arbitrary combinations of four provided wall primitives, namely infinite plane, finite disk, infinite cylinder, and finite cylinder, and degenerate cases of these. Various wall movements, including translation, oscillation, and rotation, are supported. We provide full derivations of collision prediction and resolution equations for all geometries and motions. Several tests of the method are described, including a model granular "atmosphere" that achieves correct energy equipartition, and a series of tumbler simulations that show the expected transition from tumbling to centrifuging as a function of rotation rate.
description: 54 manuscript pages, 8 figures including 4 in colour (online version only)
Dynamic photoluminescence lifetime imaging for injectiondependent lifetime measurements
Creators: name: Herlufsen, Sandra
name: Bothe, Karsten
name: Brendel, Rolf
name: Schmidt, Jan
Publisher: name: Amsterdam : Elsevier
Year: 2014
Subjects: subject: Charge carrier lifetime
subject: Photoluminescence
subject: Silicon
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We investigate the impact of an injection-dependent carrier lifetime in crystalline silicon on dynamic photoluminescence lifetime imaging (dynamic PLI). Although the dynamic lifetime approach is a technique that evaluates the time-dependence of a quantity proportional to the excess carrier density, it is only weakly influenced by the injection-level dependence of the lifetime. The reason for the little impact is the fact that the evaluation of dynamic PLI measurements does not only involve the decay of the carrier density, as it is common for photoconductance decay measurements, but also the increase of the carrier density directly after switching on the excitation source. In this contribution, we present injection-dependent lifetime measurements that are acquired with the camera-based dynamic PLI technique. We find that the deviation of the actual steady-state carrier lifetime from the lifetime obtained with dynamic PLI is less than 20 % for a wide range of measurement conditions.
title: MECHANISM OF MOLECULE MIGRATION OF CARBON AND SILICON MONOXIDES IN SILICON CARBIDE CRYSTAL
Creators: name: Kukushkin, S.A.
name: Osipov, A.V.
name: Osipova, E.V.
Publisher: name: Peter the Great St. Petersburg Polytechnic University
Year: 2019

description: The main processes occurring during the migration of molecules of carbon monoxide CO and silicon monoxide SiO gases through a layer of monocrystalline silicon carbide SiC of a cubic polytype have been described by the ab initio methods. This problem arises when a single-crystal SiC layer is grown by the method of coordinated substitution of atoms due to the chemical reaction of a crystalline silicon substrate with the CO gas. The reaction products are epitaxial SiC layer and SiO gas. It has been shown that CO and SiO molecules decompose into separate atoms in the SiC crystal. The Oxygen atoms migrate through interstices only in the [110] direction (activation energy is 2.6 eV). The Si and C atoms transit by the vacancy mechanism in the corresponding SiC sublattices with activation energies of 3.6 eV and 3.9 eV respectively (and also only in the [110] direction).
High-rate atomic layer deposition of Al2O3 for the surface passivation of Si solar cells
Creators: name: Werner, Florian
name: Stals, Walter
name: Görtzen, Roger
name: Veith, Boris
name: Brendel, Rolf
name: Schmidt, Jan
Publisher: name: Amsterdam : Elsevier BV
Year: 2011
Subjects: subject: Aluminum oxide
subject: Silicon
subject: Spatial ALD
subject: Surface passivation
subject: Aluminum oxides
subject: High quality
subject: High rate
subject: Homogeneous surfaces
subject: In-line
subject: Industrial solar cells
subject: Injection levels
subject: Interface state density
subject: Passivation layer
subject: Si solar cells
subject: Surface recombination velocities
subject: Aluminum
subject: Aluminum coatings
subject: Atomic layer deposition
subject: Crystalline materials
subject: Oxide films
subject: Oxides
subject: Photovoltaic effects
subject: Semiconducting silicon compounds
subject: Silicon solar cells
subject: Silicon wafers
subject: Passivation
subject: Konferenzschrift
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: High-rate spatial atomic layer deposition (ALD) enables an industrially relevant deposition of high-quality aluminum oxide (Al2O3) films for the surface passivation of silicon solar cells. We demonstrate a homogeneous surface passivation at a deposition rate of ∼30 nm/min on 15.6×15.6 cm2 silicon wafers of 10 nm thick Al 2O3 layers deposited in a novel inline spatial ALD system. The effective surface recombination velocity on n-type Czochralski-grown (Cz) silicon wafers is shown to be virtually independent of injection level. Surface recombination velocities below 2.9 cm/s and an extremely low interface state density below 8×1010 eV-1cm-2 are achieved. We demonstrate that the novel inline spatial ALD system provides the means to integrate Al2O3 passivation layers into industrial solar cells.
Scientific Integrity in Institutional Publishing & Open Access Books - presentation at the 3rd AEUP Conference "Publishing in Nervous Times"
Creators: name: Pinter, Frances
Publisher: name: Zenodo
Year: 2023
Subjects: scientific integrity
institutional publishing
open access
academic publishing
scholarly communication

description: A keynote by Frances Pinter on Scientific Integrity in Institutional Publishing & Open Access Books presented at the 3rd AEUP Conference "Publishing in Nervous Times" on 16 May 2023 in Tallinn, Estonia.
Layer selective laser ablation for local contacts to thin emitters
Creators: name: Haase, Felix
name: Rojas, Enrique Garralaga
name: Bothe, Karsten
name: Brendel, Rolf
Publisher: name: Amsterdam : Elsevier BV
Year: 2011
Subjects: subject: Amorphous silicon passivation
subject: Local contact openings
subject: Selective laser ablation
subject: Thin back junction emitter
subject: Ablation process
subject: Amorphous silicon layers
subject: Bulk lifetime
subject: Crystalline silicon substrates
subject: High-efficiency solar cells
subject: Junction cells
subject: Nitride layers
subject: Passivated surface
subject: Recombination rate
subject: Thin emitter
subject: Ablation
subject: Aluminum
subject: Crystalline materials
subject: Laser ablation
subject: Laser applications
subject: Passivation
subject: Photovoltaic effects
subject: Silicon nitride
subject: Transmission electron microscopy
subject: Amorphous silicon
subject: Konferenzschrift
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: High efficiency solar cells require high generation and low recombination rates. High bulk lifetime, well passivated surfaces, and lowly doped thin emitters allow for low recombination rates. Thin passivated emitters should be contacted locally in order to avoid excessive contact recombination. This is common practice for front junction solar cells but is also advantageous for back junction cells. We analyze a novel layer selective laser ablation process. From a passivating stack composed of 70 nm silicon nitride that we deposit on top of 35 nm of amorphous silicon we selectively ablate the silicon nitride layer. Transmission electron microscopy investigations confirm the full ablation of the silicon nitride layer. After the ablation process, a 17 nm-thick amorphous silicon layer remains on the substrate. The crystalline silicon substrate shows no dislocations after the process. Evaporating aluminum on top of the locally ablated nitride layers forms local contacts of the aluminum to the silicon.
title: ARTIFACTS OF STRESS RELAXATION TECHNIQUE TO FIT RECOVERY ACTIVATION PARAMETERS FOR LOW CARBON STEELS
Creators: name: Vasilyev, Alexander A.
name: Sokolov, Semen F.
name: Golubkov, Nikita A.
name: Zisman, Alexander A.
name: Sokolov, Dmitry F.
name: Rudskoy, Andrey I.
Publisher: name: Peter the Great St. Petersburg Polytechnic University
Year: 2019

description: The paper compares model predictions of recovery kinetics of low carbon steels with activation parameters determined by various experimental techniques. It is concluded that the stress relaxation method overestimates the recovery rate because the creep of stressed specimens is ignored. To avoid such errors, it is recommended to use an alternative method of double loading. The more realistic (lesser) rate of recovery with the related activation parameters complies with independent data of mechanical tests.
title: BULK GREEN'S FUNCTIONS IN ONE-DIMENSIONAL UNSTEADY PROBLEMS OF ELASTIC DIFFUSION
Creators: name: Igumnov, L.A.
name: Tarlakovskii, D.V.
name: Zemskov, A.V.
Publisher: name: Peter the Great St. Petersburg Polytechnic University
Year: 2019

description: We consider a one-dimensional unsteady problem of elasticity with diffusion and preset unsteady volumetric disturbances. The mathematical model is based on a local equilibrium model of elastic diffusion. The solution is sought in integral form. The bulk Green's functions are found via Laplace transform and Fourier transform for unbounded medium, sine and cosine transform for semi-bounded medium, Fourier's series for bounded medium.
title: Why Long-Term Marriages Last: A Review
Creators: name: Gabell, Paula
Publisher: name: Utah State University
Year: 1998

description: Marriage is a social institution experienced by most adults at least once in their life-time. Like any other type of institution marriage has its own set of norms and roles that are culturally specific to the area where it is being practiced. Marriage has existed in some form in almost every culture throughout time. There are four major types of marriages practiced in the world today. They are polygynous (one husband and many wives), polyandrous (one wife and several husbands), multilateral (several people of both sexes existing as a part of one marriage) and monogamous (two partners usually one male and one female). Currently in the United States, the only socially excepted form of marriage is a monogamous relationship involving one wife and one husband and any children born or adopted into the union living in what is called a nuclear family (Rice, 1993).
Advancements in Big Data Processing in the ATLAS and CMS Experiments
Creators: name: Vaniachine, A. V.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Databases (cs.DB)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: The ever-increasing volumes of scientific data present new challenges for distributed computing and Grid technologies. The emerging Big Data revolution drives exploration in scientific fields including nanotechnology, astrophysics, high-energy physics, biology and medicine. New initiatives are transforming data-driven scientific fields enabling massive data analysis in new ways. In petascale data processing scientists deal with datasets, not individual files. As a result, a task (comprised of many jobs) became a unit of petascale data processing on the Grid. Splitting of a large data processing task into jobs enabled fine-granularity checkpointing analogous to the splitting of a large file into smaller TCP/IP packets during data transfers. Transferring large data in small packets achieves reliability through automatic re-sending of the dropped TCP/IP packets. Similarly, transient job failures on the Grid can be recovered by automatic re-tries to achieve reliable six sigma production quality in petascale data processing on the Grid. The computing experience of the ATLAS and CMS experiments provides foundation for reliability engineering scaling up Grid technologies for data processing beyond the petascale.
description: 7 pages, 7 figures
Stochastic extension of the Lanczos method for nuclear shell-model calculations with variational Monte Carlo method
Creators: name: Shimizu, Noritaka
name: Mizusaki, Takahiro
name: Kaneko, Kazunari
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We propose a new variational Monte Carlo (VMC) approach based on the Krylov subspace for large-scale shell-model calculations. A random walker in the VMC is formulated with the $M$-scheme representation, and samples a small number of configurations from a whole Hilbert space stochastically. This VMC framework is demonstrated in the shell-model calculations of $^{48}$Cr and $^{60}$Zn, and we discuss its relation to a small number of Lanczos iterations. By utilizing the wave function obtained by the conventional particle-hole-excitation truncation as an initial state, this VMC approach provides us with a sequence of systematically improved results.
description: 5 pages, 4 figures, submitted to Physics Letters B
Carex lepidocarpa Tausch
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: C. lepidocarpa Tausch (C. flava ssp.lepidocarpa Lange) Cat. 369. 3:Beim Hotel Trift ob Zermatt, 2310m (Thellung 1922).- 4:Aletschwald (Lüdi).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Human-GDPR Interaction: Practical Experiences of Accessing Personal Data
Creators: name: Bowyer, Alex
name: Holt, Jack
name: Jefferies, Josephine Go
name: Wilson, Rob
name: Kirk, David
name: Smeddinck, Jan David
Publisher: name: arXiv
Year: 2022
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: In our data-centric world, most services rely on collecting and using personal data. The EU's General Data Protection Regulation (GDPR) aims to enhance individuals' control over their data, but its practical impact is not well understood. We present a 10-participant study, where each participant filed 4-5 data access requests. Through interviews accompanying these requests and discussions scrutinising returned data, it appears that GDPR falls short of its goals due to non-compliance and low-quality responses. Participants found their hopes to understand providers' data practices or harness their own data unmet. This causes increased distrust without any subjective improvement in power, although more transparent providers do earn greater trust. We propose designing more effective, data-inclusive and open policies and data access systems to improve both customer relations and individual agency, and also that wider public use of GDPR rights could help with delivering accountability and motivating providers to improve data practices.
description: 19 pages, to be published in CHI Conference on Human Factors in Computing Systems (CHI '22), April 29 - May 05, 2022, New Orleans, LA, USA
title: Verhandeling over het Westland
Creators: name: Simrock, Karl
Publisher: name: University Library Heidelberg
Year: 2015

description: Verhandeling over het Westland, ter Ophelderiug der Loo - en, Woerden en Hoven benevens de Natuurdienst der Friesen en Batavieren, opgedragen aan de Faculteit der bespiegelende Wijsbe - geerte en fraaije Letteren te Groningen, door D. Buddingh. Leyden, 1844. 8. XXIV. u. 446. Mit einer Karte des Westlands.
Digging supplementary buried channels: investigating the notch architecture within the CCD pixels on ESA's Gaia satellite
Creators: name: Seabroke, G. M.
name: Prod'homme, T.
name: Murray, N. J.
name: Crowley, C.
name: Hopkinson, G.
name: Brown, A. G. A.
name: Kohley, R.
name: Holland, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The European Space Agency (ESA) Gaia satellite has 106 CCD image sensors which will suffer from increased charge transfer inefficiency (CTI) as a result of radiation damage. To aid the mitigation at low signal levels, the CCD design includes Supplementary Buried Channels (SBCs, otherwise known as `notches') within each CCD column. We present the largest published sample of Gaia CCD SBC Full Well Capacity (FWC) laboratory measurements and simulations based on 13 devices. We find that Gaia CCDs manufactured post-2004 have SBCs with FWCs in the upper half of each CCD that are systematically smaller by two orders of magnitude (<50 electrons) compared to those manufactured pre-2004 (thousands of electrons). Gaia's faint star (13 < G < 20 mag) astrometric performance predictions by Prod'homme et al. and Holl et al. use pre-2004 SBC FWCs as inputs to their simulations. However, all the CCDs already integrated onto the satellite for the 2013 launch are post-2004. SBC FWC measurements are not available for one of our five post-2004 CCDs but the fact it meets Gaia's image location requirements suggests it has SBC FWCs similar to pre-2004. It is too late to measure the SBC FWCs onboard the satellite and it is not possible to theoretically predict them. Gaia's faint star astrometric performance predictions depend on knowledge of the onboard SBC FWCs but as these are currently unavailable, it is not known how representative of the whole focal plane the current predictions are. Therefore, we suggest Gaia's initial in-orbit calibrations should include measurement of the onboard SBC FWCs. We present a potential method to do this. Faint star astrometric performance predictions based on onboard SBC FWCs at the start of the mission would allow satellite operating conditions or CTI software mitigation to be further optimised to improve the scientific return of Gaia.
description: Accepted for publication in MNRAS, 16 pages, 19 figures
Loss analysis and improvements of industrially fabricated Cz-Si solar cells by means of process and device simulations
Creators: name: Steingrube, S.
name: Wagner, Hannes
name: Hannebauer, Helge
name: Gatz, Sebastian
name: Chen, R.
name: Dunham, S.T.
name: Dullweber, Thorsten
name: Altermatt, Pietro P.
name: Brendel, Rolf
Publisher: name: Amsterdam : Elsevier BV
Year: 2011
Subjects: subject: Cz-Si
subject: Device simulations
subject: Loss analysis
subject: Process simulations
subject: Si solar cells
subject: Solar cell improvement
subject: Boron
subject: Crystalline materials
subject: Forecasting
subject: Nanostructured materials
subject: Optical losses
subject: Photovoltaic effects
subject: Silicon
subject: Silicon solar cells
subject: Computer simulation
subject: Konferenzschrift
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We model currently fabricated industrial-type screen-printed boron-doped Cz silicon solar cells using a combination of process and device simulations. The model reproduces the experimental results precisely and allows us to predict both the efficiency gain after specific cell improvements and the associated thermal budgets. Separating the resistive losses (evaluated for various contributions) from the recombination losses (evaluated in different device regions) allows us to forecast the improvements of the emitter and the rear side necessary such that the recombination losses in the base dominate. We predict that to increase cell efficiency considerably beyond 19.7 %, the base material needs to be improved.
Einstein@Home search for continuous gravitational waves from Cassiopeia A
Creators: name: Zhu, Sylvia J.
name: Papa, Maria Alessandra
name: Eggenstein, Heinz-Bernd
name: Prix, Reinhard
name: Wette, Karl
name: Allen, Bruce
name: Bock, Oliver
name: Keitel, David
name: Krishnan, Badri
name: Machenschalk, Bernd
name: Shaltev, Miroslav
name: Siemens, Xavier
Publisher: name: College Park, MD : American Physical Society
Year: 2016
Subjects: subject: Cassiopeia A
subject: Cas A
subject: LIGO
subject: gravitational-wave
subject: Gravitationswelle
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We report the results of a directed search for continuous gravitational-wave emission in a broad frequency range (between 50 and 1000 Hz) from the central compact object of the supernova remnant Cassiopeia A (Cas A). The data come from the sixth science run of LIGO, and the search is performed on the volunteer distributed computing network Einstein@Home. We find no significant signal candidate and set the most constraining upper limits to date on the gravitational-wave emission from Cas A, which beat the indirect age-based upper limit across the entire search range. At 170 Hz (the most sensitive frequency range), we set 90% confidence upper limits on the gravitational-wave amplitude h0 of ∼2.9×10−25, roughly twice as constraining as the upper limits from previous searches on Cas A. The upper limits can also be expressed as constraints on the ellipticity of Cas A; with a few reasonable assumptions, we show that at gravitational-wave frequencies greater than 300 Hz we can exclude an ellipticity of ≳10−5.
GRACE-FO monthly solutions using the GRACE-SIGMA software
Creators: name: Koch, Igor
name: Flury, Jakob
name: Shabanloui, Akbar
Publisher: name: Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
Year: 2019
Subjects: subject: GRACE-FO
subject: GRACE
subject: Gravity field recovery
subject: Time-variable gravity field
subject: Parametrization
subject: Dynamic orbit determination
subject: KBRR residuals
subject: Schwerefeldbestimmung
subject: Zeitvariables Schwerefeld
subject: Parametrisierung
subject: Dynamische Bahnbestimmung
subject: KBRR-Residuen
subject: Dewey Decimal Classification::500 | Naturwissenschaften::550 | Geowissenschaften

description: In this contribution we present gravity field monthly solutions from GRACE Follow-On (GRACE-FO) Level-1B sensor data. The monthly solutions are computed with the GRACE-SIGMA software developed at the Institute of Geodesy, Leibniz University Hannover. The solutions are obtained using a two-step approach. In a first step, the orbits of the two satellites are pre-adjusted by estimating local arc parameters. In a second step, the monthly gravity field potential in terms of normalized spherical harmonic coefficients is recovered. Several parametrization scenarios are tested and the obtained solutions are compared with solutions of other processing centers. Furthermore, K-band range-rate (KBRR) post-fit residuals are analyzed in time, frequency and space domain and are compared to the typical post-fit residuals of the GRACE mission.
Deriving Stellar Effective Temperatures of Metal-Poor Stars with the Excitation Potential Method
Creators: name: Frebel, Anna
name: Casey, Andrew R.
name: Jacobson, Heather R.
name: Yu, Qinsi
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: It is well established that stellar effective temperatures determined from photometry and spectroscopy yield systematically different results. We describe a new, simple method to correct spectroscopically derived temperatures ("excitation temperatures") of metal-poor stars based on a literature sample with -3.3
description: 12 pages, emulateapj, accepted for publication in ApJ
Estimation of phase center variation and its effect on precise orbit determination
Creators: name: Shabanloui, Akbar
Publisher: name: Leibniz Universität Hannover
Year: 2011
Subjects: subject: Antenna phase center variation
subject: Satellite precise orbit determination
subject: GNSS Antennen-Phasenzentrum
subject: Satelliten Bahnbestimmung
subject: Dewey Decimal Classification::500 | Naturwissenschaften::520 | Astronomie, Kartographie
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: The interest in a precise orbit determination (POD) of Low Earth Orbiters (LEOs) especially in pure geometrical mode only based on GNSS (Global Navigation Satellite System) observations has been rapidly grown. The geometrical absolute positions of LEO can be estimated based on carrier phase SST (Satellite to Satellite Tracking) observations with an accuracy of cm. However, limiting factor for LEO POD is mainly encountered with the modeling of the carrier phase observations, where a phase center location of the GNSS antenna is a pre-requisite for precise determination of LEO orbit. Based on robot calibration, the absolute phase center (PC) and its variation (PCV) are estimated for a number of GNSS receiver antennas. It should be mentioned that for the GNSS transmitter antennas, the absolute phase centers and their variations are estimated based on GNSS data post-processing. Nowadays, the Earth gravity field recovery missions are equipped with non-geodetic receiver antennas, which the phase centers and their variation before launch are determined based on robot calibration strategy. After mission launch, the empirical antenna phase center and phase center variation should be estimated based on GNSS carrier phase observations to improve accuracy LEO orbit. In this paper, different methods to estimate phase center variation are introduced, applied to the twin GRACE and GOCE observations and improvements on POD will be discussed.
Experiment with the Bonn Scintrex CG-5
Creators: name: Shabanloui, Akbar
name: Kusche, Jürgen
Publisher: name: Leibniz Universität Hannover
Year: 2013
Subjects: subject: Autograv Relativ Gravimeter,
subject: Scintrex CG-5
subject: Tilt Experiment
subject: Autograv Relativ Gravimeter
subject: Neigung Experiment
subject: Dewey Decimal Classification::500 | Naturwissenschaften::520 | Astronomie, Kartographie
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Scintrex Company Ltd has built a very precise and sensitive relative gravimeter AutoGrav CG-5 which is commonly used for mineral, oil and gas geo-technical explorations with an accuracy of 5 Micro-Gal. All of these applications are based on a glass-quartz spring, which are very sensitive to temperature changes, tilt and shake. Therefore, it is very essential to keep spring in a stable environment and avoiding of tilt and shake. In this investigation, the behavior of the CG-5 in Bonn and Bad-Homburg will be discussed. In addition, the tilt behavior of glass-quartz spring of the CG-5 in cooperation with other Institutes is tested. The main goal of tilt experiment is to establish a relationship between duration of the tilt and offsets as function of time. The results show that CG-5 gravimeter needs some hours to stabilize the glass quartz spring.
Candidate super star cluster progenitor gas clouds possibly triggered by close passage to Sgr A*
Creators: name: Longmore, S. N.
name: Kruijssen, J. M. D.
name: Bally, J.
name: Ott, J.
name: Testi, L.
name: Rathborne, J.
name: Bastian, N.
name: Bressert, E.
name: Molinari, S.
name: Battersby, C.
name: Walsh, A. J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Super star clusters are the end product of star formation under the most extreme conditions. As such, studying how their final stellar populations are assembled from their natal progenitor gas clouds can provide strong constraints on star formation theories. An obvious place to look for the initial conditions of such extreme stellar clusters are gas clouds of comparable mass and density, with no star formation activity. We present a method to identify such progenitor gas clouds and demonstrate the technique for the gas in the inner few hundred pc of our Galaxy. The method highlights three clouds in the region with similar global physical properties to the previously identified extreme cloud, G0.253+0.016, as potential young massive cluster (YMC) precursors. The fact that four potential YMC progenitor clouds have been identified in the inner 100 pc of the Galaxy, but no clouds with similar properties have been found in the whole first quadrant despite extensive observational efforts, has implications for cluster formation/destruction rates across the Galaxy. We put forward a scenario to explain how such dense gas clouds can arise in the Galactic centre environment, in which YMC formation is triggered by gas streams passing close to the minimum of the global Galactic gravitational potential at the location of the central supermassive black hole, Sgr A*. If this triggering mechanism can be verified, we can use the known time interval since closest approach to Sgr A* to study the physics of stellar mass assembly in an extreme environment as a function of absolute time.
description: 6 pages, 2 figures, 1 table; accepted for publication in MNRAS Letters
title: THE INFLUENCE OF GAMMA RAYS RADIATION ON OPTICALLY INDUCED LUMINESCENCE OF COPPER-CONTAINING POTASSIUM-LITHIUM-BORATE GLASS
Creators: name: Shirshnev, P.S.
name: Spiridonov, V.A.
name: Panov, D.I.
name: Shirshneva-Vaschenko, E.V.
name: Gafarova, A.R.
name: Eremina, R.M.
name: Romanov, A.E.
name: Bougrov, V.E.
Publisher: name: Peter the Great St. Petersburg Polytechnic University
Year: 2019

description: The paper presents the results of potassium-lithium-borate glass containing copper ions investigations. The glass was irradiated by 1.25 MeV gamma rays. The dose of radiation was 360 Gy. The exciting of the irradiated glass at 360 nm led to the long-wavelength photoluminescence band shift from 635 nm to 671 nm in comparison with non-irradiated glass. A new luminescence band at 685 nm also appeared for excitation wavelength 405 nm in the irradiated glass. It has been assumed that the luminescence band in glass at 671 nm – 685 nm corresponds to the luminescence of copper ions in the modified environment of the first coordination sphere. Copper-containing luminescent structures in borate glass with the luminescence maximum at 671-685 nm have been obtained for the first time. For the detailed study of these luminescent centers properties, thorough study of the structural variations in the gamma rays irradiated glass is required.
Synthetic horizontal branch morphology for different metallicities and ages under tidally enhanced stellar wind
Creators: name: lei, Z.
name: Zhang, F.
name: Ge, H.
name: Han, Z.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: It is believed that, except for metallicity, some other parameters are needed to explain the horizontal branch (HB) morphology of globular clusters (GCs). Furthermore, these parameters are considered to be correlated with the mass loss of the red giant branch (RGB) stars. In our previous work, we proposed that tidally enhanced stellar wind during binary evolution may affect the HB morphology by enhancing the mass loss of the red giant primary. As a further study, we now investigate the effects of metallicity and age on HB morphology by considering tidally enhanced stellar winds during binary evolution. We incorporated the tidally enhanced-stellar-wind model into Eggleton's stellar evolution code to study the binary evolution. To study the effects of metallicity and age on our final results, we conducted two sets of model calculations: (i) for a fixed age, we used three metallicities, namely Z=0.0001, 0.001, and 0.02. (ii) For a fixed metallicity, Z=0.001, we used five ages in our model calculations: 14, 13, 12, 10, and 7 Gyr. We found that HB morphology of GCs becomes bluer with decreasing metallicity, and old GCs present bluer HB morphology than young ones. These results are consistent with previous work. Although the envelope-mass distributions of zero-age HB stars produced by tidally enhanced stellar wind are similar for different metallicities, the synthetic HB under tidally enhanced stellar wind for Z=0.02 presented a distinct gap between red and blue HB. However, this feature was not seen clearly in the synthetic HB for Z=0.001 and 0.0001. We also found that higher binary fractions may make HB morphology become bluer, and we discussed the results with recent observations.
description: 16 pages, 6 figures, 3 tables, accepted for publication in Astronomy & Astrophysics
title: Research and Design of a High L/D Aircraft
Creators: name: Ashby, Blake
name: Nielson, Gregory
Publisher: name: Utah State University
Year: 1998

description: This senior design team, consisting of Blake Ashby, Shelly Barlow, Greg Nielson, Deryl Snyder, and Chris Wright, designed, built, and flew an airplane that met the requirements of the Cessna/ONR Student Design/Build/Fly Competition sponsored by AIAA. This radio-controlled airplane was designed to fly the most laps around a course in seven minutes using only 2.5 pounds of NiCad batteries. A total of three senior design teams from Utah State University designed separate airplanes. Though all three teams designed, built, and tested complete airplanes, each emphasized a different aspect of a successful entry. This team emphasized theoretical and numerical analysis in order to build an aerodynamically clean and efficient airplane. The other teams stressed motor/propellor efficiency and electronic speed control. This team's airplane represented the university at the contest in Wichita, Kansas on April 25, 1998.
title: Методика преподавания психологии
Creators: name: ELS IPR BOOKS
Publisher: name: Издательство Владимирского государственного университета
Year: 2017

description: Знакомит читателей с методикой преподавания психологии и включает в себя помимо лекционного курса вопросы для повторения по каждой из тем, специальные задания теоретической и практической направленности, а также тестовый контроль по всем темам курса. Предназначено для студентов, магистрантов, аспирантов высших учебных заведений, интересующихся образовательными технологиями, вопросами методического обеспечения процесса обучения в вузе, возможностями его совершенствования. Рекомендовано для формирования профессиональных компетенций в соответствии с ФГОС ВО.
Carex punctata Gaudin
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: C. punctata Gaudin 2: Bei der Station LaldennordöstlichVisp (Oberholzer1926).- 3a:An der SimplonstrassezwisehenGondound der italienischenGrenze (Becherer 1942).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
A new representation of the Adler function for lattice QCD
Creators: name: Francis, Anthony
name: Jaeger, Benjamin
name: Meyer, Harvey B.
name: Wittig, Hartmut
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We address several aspects of lattice QCD calculations of the hadronic vacuum polarization and the associated Adler function. We implement a representation derived previously which allows one to access these phenomenologically important functions for a continuous set of virtualities, irrespective of the flavor structure of the current. Secondly we present a theoretical analysis of the finite-size effects on our particular representation of the Adler function, based on the operator product expansion at large momenta and on the spectral representation of the Euclidean correlator at small momenta. Finally, an analysis of the flavor structure of the electromagnetic current correlator is performed, where a recent theoretical estimate of the Wick-disconnected diagram contributions is rederived independently and confirmed.
description: 9 pages, 5 figures
title: Coding Bootcamps - Perceptions and Outcomes
Creators: name: Hendricks, Logan L.
Publisher: name: Utah State University
Year: 2023

description: This thesis is focused on gathering, aggregating and analysing data related to software development coding bootcamps. It comprises of three major research initiatives: A coding bootcamp outcomes meta-analysis, a study on perspectives regarding white-label coding bootcamps, and the data analysis of a survey gathering long-term outcomes of coding bootcamp and certificate program graduates.
The first study aggregates graduate outcome data from the three main organizations that review coding bootcamp outcomes: CourseReport.com, SwitchUp.com and the Council on Integrity in Results Reporting (CIRR). The purpose of this meta-review is to establish a baseline dataset which is immediately utilized in my further research. It also acts as a baseline for future research.
The second study is designed to gather opinions on White-label coding bootcamps from currently employed software engineers and software engineering managers. White-label coding bootcamps are a newer business model that has developed in the last decade and are coding bootcamp education providers who provide out of the box bootcamp solutions for existing education institutions. This study proposes that white-label coding bootcamps are a risk for all parties involved in the transaction. Namely, the white-label provider, the partnering education institution, and the students. The data potentially indicated that the public maintains neutral to positive opinions on the white-label programs when they unaware of the particular business model. However, when an individual becomes aware of the relationship, their opinion demonstrates a negativity to the program.
The third study is focused on gathering long-term outcome data from graduates of coding bootcamps and certificate programs. This gathered data will fill a gap in the currently collected outcome data available to the public. It is also being utilized to determine the potential factors that impact long-term salary growth and software engineering transition for these graduates.
title: ОСНОВНЫЕ ТЕНДЕНЦИИ РАЗВИТИЯ ЗАКОНОДАТЕЛЬСТВА ЗАРУБЕЖНЫХ СТРАН В ОБЛАСТИ КОНТРОЛЯ  ОПЕРАЦИЙ С ДРАГОЦЕННЫМИ МЕТАЛЛАМИ И ДРАГОЦЕННЫМИ КАМНЯМИ
Creators: name: Замышляев, Дмитрий
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2019

description: В статье анализируются закрепленные  в законодательстве зарубежных стран и России способы контроля операций с драгоценными металлами и драгоценными камнями. Особое внимание уделено основаниям административной и уголовной ответственности в России и отдельных зарубежных странах по предупреждению и пресечению правонарушений операций с драгоценными металлами и камнями.