cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Weakly Nonlinear Theory of Dynamic Fracture
Creators: name: Bouchbinder, Eran
name: Livne, Ariel
name: Fineberg, Jay
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The common approach to crack dynamics, linear elastic fracture mechanics (LEFM), assumes infinitesimal strains and predicts a $r^{-1/2}$ strain divergence at a crack tip. We extend this framework by deriving a weakly nonlinear fracture mechanics theory incorporating the leading nonlinear elastic corrections that must occur at high strains. This yields strain contributions "more-divergent" than $r^{-1/2}$ at a finite distance from the tip and logarithmic corrections to the parabolic crack tip opening displacement. In addition, a dynamic length-scale, associated with the nonlinear elastic zone, emerges naturally. The theory provides excellent agreement with recent near-tip measurements that can not be described in the LEFM framework.
description: 4 pages, 2 figures, second of a two-paper series (theory); no change in content, minor textual revisions
CPT and Lorentz violation effects in hydrogen-like atoms
Creators: name: Kharlanov, O. G.
name: Zhukovsky, V. Ch.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Within the framework of Lorentz-violating extended electrodynamics, the Dirac equation for a bound electron in an external electromagnetic field is considered assuming the interaction with a CPT-odd axial vector background $b_μ$. The quasi-relativistic Hamiltonian is obtained using a $1/c$-series expansion. Relativistic Dirac eigenstates in a spherically-symmetric potential are found accurate up to the second order in $b_0$. $b_0$-induced CPT-odd corrections to the electromagnetic dipole moment operators of a bound electron are calculated that contribute to the anapole moment of the atomic orbital and may cause a specific asymmetry of the angular distribution of the radiation of a hydrogen atom.
description: 13 pages, 1 figure; (5.14) is corrected to conform to the normalization convention for Laguerre polynomials adopted at present; minor grammatical changes
Characteristic of Aluminum Paste Effect in n-Type Aluminum-Alloyed Rear Emitter Solar Cell
Creators: name: Chiu, M.-H.
name: Lin, Y.-H.
name: Hu, Y.-C.
name: Yang, S.-H.
Publisher: name: WIP
Year: 2012
Subjects: Wafer-Based Silicon Solar Cells and Materials Technology
Silicon Solar Cell Improvements

description: 27th European Photovoltaic Solar Energy Conference and Exhibition; 1503-1507
description: In this paper we discussed about the effect of characteristics of aluminum pastes in n-type solar cells with rear
emitters (N-RE). Three aluminum pastes with different quantities of aluminum particle, 60 wt%, 70 wt% and 80 wt%, were
respectively printed on rear sides of silicon wafers with subsequent firing step to form aluminum-alloyed emitters. The result
shows that pastes with less weight percentage of aluminum content induce the phenomenon of discontinuous emitter causing
shunting losses. Whilst, paste with aluminum content of 80 wt% results in a better emitter performance, even achieve cell
champion efficiency of 18.0% for 6- inch n-type monocrystalline cell. Furthermore, the issue of light induced degradation (LID)
for both standard p-mono cell and N-RE cell was also examined after 60kWh/m2 illumination. More obvious LID is found in
standard p-mono cells rather than N-RE cells, in favor of the advantage of efficiency stability for N-RE cells.
Light Induced Degradation of Rear Passivated mc-Si Solar Cells
Creators: name: Ramspeck, K.
name: Zimmermann, S.
name: Nagel, H.
name: Metz, A.
name: Gassenbauer, Y.
name: Birkmann, B.
name: Seidl, A.
Publisher: name: WIP
Year: 2012
Subjects: Wafer-Based Silicon Solar Cells and Materials Technology
Silicon Solar Cell Characterization and Modelling

description: 27th European Photovoltaic Solar Energy Conference and Exhibition; 861-865
description: We compare the degradation behaviour of rear-passivated high efficiency silicon solar cells processed
from mc-, Cz-, and cast-mono Si materials. We observe that cells processed from mc-Si unexpectedly show a
stronger degradation than cells processed from cast-mono or Cz-Si. Using Ga-doped mc-Si, we prove that the
degradation observed on mc-Si cannot be attributed to B-O complex formation or FeB pair dissociation. For castmono,
a similar degradation characteristic as for mc-Si is observed, however, the degradation is much less
pronounced, making this material class a favourable candidate for processing of high efficiency rear passivated solar
cells.
Recombination limited energy relaxation in a BCS superconductor
Creators: name: Timofeev, A. V.
name: Garcia, C. Pascual
name: Kopnin, N. B.
name: Savin, A. M.
name: Meschke, M.
name: Giazotto, F.
name: Pekola, J. P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study quasiparticle energy relaxation at sub-kelvin temperatures by injecting hot electrons into an aluminium island and measuring the energy flux from electrons into phonons both in the superconducting and in the normal state. The data show strong reduction of the flux at low temperatures in the superconducting state, in qualitative agreement with the presented quasiclassical theory for clean superconductors. Quantitatively, the energy flux exceeds that from the theory both in the superconducting and in the normal state, possibly suggesting an enhanced or additional relaxation process.
Thin Wafers by the SLIM-Cut Process Using a Halogen Lamp Furnace
Creators: name: Bellanger, P.
name: Masolin, A.
name: Brito, M.C.
name: Pera, D.
name: Costa, I.
name: Poortmans, J.
name: Mertens, R.
name: Serra, J.M.
Publisher: name: WIP
Year: 2012
Subjects: Wafer-Based Silicon Solar Cells and Materials Technology
Silicon Feedstock, Crystallisation and Wafering

description: 27th European Photovoltaic Solar Energy Conference and Exhibition; 1042-1044
description: The “Stress induced LIft-off Method” (SLIM-cut) is a new process of fabrication of thin silicon wafers, that may
contribute for the reduction of photovoltaic costs by avoiding the standard wafering step. The SLIM-cut process comprises
three stages: a metallic layer deposition step by screen printing on top of a monocrystalline silicon slab, a heating step
necessary to detach a thin silicon layer and a cleaning step to remove the metal. Indeed, during cooling, the difference in
thermal expansion coefficients between the silicon and the metal will induce a stress that can lead to the propagation of a
crack parallel to the surface. A new SLIM-cut furnace developed in our lab is presented. In these first results, samples with
an area of 15 cm2 are detached successfully at low T, i.e. T<700ºC, with thicknesses around 50 μm. A Secco etching
followed by etch pit analysis indicates a density of defects in the foil is around 106 /cm2. The effective lifetime reaches a
value around 1μs, after iodine ethanol passivation.
R-symmetry, supersymmetry breaking and metastable vacua in global and local supersymmetric theories
Creators: name: Abe, Hiroyuki
name: Kobayashi, Tatsuo
name: Omura, Yuji
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study N=1 global and local supersymmetric theories with a continuous global $U(1)_R$ symmetry as models of dynamical supersymmetry (SUSY) breaking. We introduce explicit R-symmetry breaking terms into such models, in particular a generalized O'Raifeartaigh model. Such explicit R-symmetry breaking terms can lead to a SUSY preserving minimum. We classify explicit R-symmetry breaking terms by the structure of newly appeared SUSY stationary points as a consequence of the R-breaking effect, which could make the SUSY breaking vacuum metastable. We show that the R-breaking terms are basically divided into two categories. One of them does not generate a SUSY solution, or yields SUSY solutions that disappear in the case of supergravity when we tune a parameter so that the original SUSY breaking minimum becomes a Minkowski vacuum. We also show that the general argument by Nelson and Seiberg for a dynamical SUSY breaking still holds with a local SUSY except for a certain nontrivial case, and present concrete examples of the exception.
description: 29 pages, 1 figure
Galaxy Properties at the Faint End of the HI Mass Function
Creators: name: McQuinn, Kristen B. W.
name: Telidevara, Anjana K.
name: Fuson, Jackson
name: Adams, Elizabeth A. K.
name: Cannon, John M.
name: Skillman, Evan D.
name: Dolphin, Andrew E.
name: Haynes, Martha P.
name: Rhode, Katherine L.
name: Salzer, John. J.
name: Giovanelli, Riccardo
name: Gordon, Alex J. R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The Survey of HI in Extremely Low-mass Dwarfs (SHIELD) includes a volumetrically complete sample of 82 gas-rich dwarfs with M_HI~<10^7.2 Msun selected from the ALFALFA survey. We are obtaining extensive follow-up observations of the SHIELD galaxies to study their gas, stellar, and chemical content, and to better understand galaxy evolution at the faint end of the HI mass function. Here, we investigate the properties of 30 SHIELD galaxies using Hubble Space Telescope imaging of their resolved stars and Westerbork Synthesis Radio Telescope observations of their neutral hydrogen. We measure tip of the red giant branch (TRGB) distances, star formation activity, and gas properties. The TRGB distances are up to 4x greater than estimates from flow models, highlighting the importance of velocity-independent distance indicators in the nearby universe. The SHIELD galaxies are in under-dense regions, with 23% located in voids; one galaxy appears paired with a more massive dwarf. We quantify galaxy properties at low masses including stellar and HI masses, SFRs, sSFRs, SFEs, birthrate parameters, and gas fractions. The lowest mass systems lie below the mass thresholds where stellar mass assembly is predicted to be impacted by reionization. Even so, we find the star formation properties follow the same trends as higher mass gas-rich systems, albeit with a different normalization. The HI disks are small (<0.7 kpc) making it difficult to measure the HI rotation using standard techniques; we develop a new methodology and report the velocity extent, and its associated spatial extent, with robust uncertainties.
description: 43 pages, 32 figures, 6 tables
Analysis of the Emitter Saturation Current Density of Industrial Type Silver Screen-Printed Front Contacts
Creators: name: Hannebauer, H.
name: Sommerfeld, M.
name: Müller, J.
name: Dullweber, T.
name: Brendel, R.
Publisher: name: WIP
Year: 2012
Subjects: Wafer-Based Silicon Solar Cells and Materials Technology
Silicon Solar Cell Characterization and Modelling

description: 27th European Photovoltaic Solar Energy Conference and Exhibition; 1360-1363
description: Selective emitters for industrial-type silicon solar cells have gained increasing attention in the past
years. However, the assessment of the improvement potential of a selective emitter so far mainly relies on the
obtained conversion efficiency of the resulting solar cells. In this paper we employ using the dynILM method to
measure the emitter saturation current densities on SiNx passivated (J0e,pass) as well as Ag screen-printed (J0e,met)
phosphorus emitters on test wafers which are similar to industrial-type silicon solar cells. The J0e,met of the Ag screenprinted
emitter increases from 210 fA/cm² up to 570 fA/cm² with increasing sheet resistance. In contrast, the J0e,pass
decreases from 147 fA/cm² to 95 fA/cm² with increasing sheet resistance. Compared to previous work on laboratory type
cell structures, our results show lower J0e,met values and higher J0e,pass values which might be explained by the different
emitter profiles. The measured J0e,pass and J0e,met values allow to calculate the total emitter saturation current density
J0e,total. For a homogeneously doped 60 Ω/sq emitter we predict a J0e,total of 140 fA/cm². A selective Emitter with
30 Ω/sq below the metal contacts and 100 Ω/sq below the SiNx passivation results in a J0e,total of 106 fA/cm². The
reduction in J0e,total corresponds to an approx 3 to 5 mV higher Voc compared to the homogeneously doped emitter.
Keeper of the protocols : the works of Jens Bjørneboe in the crosscurrents of western literature
Creators: name: Martin, Joseph H.
Publisher: name: University of British Columbia
Year: 2010

description: Keeper of the Protocols argues that Jens Bjørneboe was a consciously European author, of international stature, whose works cannot be properly understood if treated simply as the product of a "Scandinavian" writer. As Bjørneboe remains for the most part untranslated into English, the objectives of the study are two-fold: to introduce the works of Jens Bjørneboe, and to provide a detailed commentary on influence in his works from classic and contemporary sources. The first chapter serves as an introduction to Bjørneboe supplying a concise overview of his literary career as playwright, novelist, poet and essayist. In chapter two, his early achievements as a poet and novelist are discussed. The point of departure for the earliest works lies in the spiritual system of Anthroposophy and the powerful influence of Rilke. The chapter culminates with commentaries on his highly controversial debate-novels. The third chapter is an extended study of his pivotal trilogy known as "The History of Bestiality": Frihetens øyeblikk (1966), Kruttårnet (1970) and Stillheten (1973). While the trilogy represents a confrontation with Western , culture, it also depicts modern man in a world devoid of values and meaning. Here, the influence of Nietzsche and Sartre are traceable. In the trilogy, Bjørneboe's thinking on violence and society intersects with that of Michel Foucault and René Girard. The fourth chapter is a discussion of Bjørneboe and the theater. As a Norwegian dramatist who rejected Ibsen's form of theater, he found recourse alternately in Brecht, Strindberg and Tennessee Williams. Bjørneboe's major plays can best be understood in light of this set of influences. The fifth and final chapter examines the "anarchism" which was Bjørneboe's final philosophical resting place. The parallels with Camus's ideas in L'Homme revolté are readily discernible. Bjørneboe's final novel, Haiene (1974), which was to commence his "History of Freedom," is a sea novel which invites comparison with Conrad, particularly Conrad's conception of history. Bjørneboe's letters and unpublished autobiography show an increasing preoccupation with the split between social and metaphysical concerns. His final months, and his assessment of his own literary accomplishment, are reviewed in light of this conflict.
Coulomb dissociation, a tool for nuclear astrophysics
Creators: name: Baur, G.
name: Typel, S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: A short status report on Coulomb dissociation, an indirect method for nuclear astrophysics is given. An analytically solvable approach to study electromagnetic excitation in ^{11}Be, the archetype of a halo nucleus, is proposed.
description: 6 pages, contribution to Nuclear Physics in Astrophysics III, 26-31 March 2007, Dresden, Germany, typos corrected, accepted for publication in J.Phys. G
Schnabl's Solution and Boundary States in Open String Field Theory
Creators: name: Kawano, Teruhiko
name: Kishimoto, Isao
name: Takahashi, Tomohiko
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We discuss that Schnabl's solution is an off-shell extension of the boundary state describing a D-brane in the closed string sector. It gives the physical meaning of the gauge invariant overlaps for the solution in our previous paper and supports Ellwood's recent proposal in the operator formalism.
description: 4 pages, LaTeX2e; v2: a comment and a footnote added at the end
Anharmonic Vibrational Spectrum and Experimental Matrix Isolation Study of Thioformic Acid Conformers -- Potential Candidates for Molecular Cloud and Solar System Observations?
Creators: name: Lignell, Antti
name: Osadchuk, Irina
name: Rasanen, Markku
name: Lundell, Jan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Thioformic acid (TFA) is the sulfur analog of formic acid, the simplest organic acid. It has three analogues HCOSH, HCSOH, and HCSSH, each of them having two rotational isomeric (rotameric) forms: trans and cis where the trans form is energetically more stable. In this article, we study computational energetics and anharmonic vibrational spectrum of TFA including overtone and combination vibrations. We also studied experimental photoisomerization and photodecomposition channels of HCOSH molecules with different wavelengths. We suggest that TFA is a potential sulfur containing candidate molecule for interstellar and planetary observations and discuss these in a light of different radiation environments in space. More generally, we discuss that infrared radiation driven photo-isomerization reactions may be a common phenomenon in such environments and can affect the chemical reaction pathways of organic and other interstellar molecules.
description: Accepted to ApJ, 21 pages, 4 figures
Determining and Increasing the Hosting Capacity for Photovoltaics in Swedish Distribution Grids
Creators: name: Walla, T.
name: Widén, J.
name: Johansson, J.
name: Bergerland, C.
Publisher: name: WIP
Year: 2012
Subjects: PV - a Major Electricity Source
PV in the Electricity Mix

description: 27th European Photovoltaic Solar Energy Conference and Exhibition; 4414-4420
description: For planning issues, it is useful to know the upper limit for photovoltaics (PV) in the electricity
distribution grid with the existing design and operation – the grid’s hosting capacity – and how this limit can be
increased. The aim of this paper is to quantify the hosting capacity for PV in Swedish electricity distribution grids.
Three distribution grids, belonging to the Swedish DSO Fortum, are modeled and simulated in a Matlab environment:
from one rural area, one residential area and one city area. The simulation includes standard Newton-Raphson powerflow
computing, improved with a model of the temperature dependence of the resistance, and allows deterministic
and probabilistic simulations. The results show that high PV penetrations can be allowed in the Swedish grids. When
using voltage rise above 1.1 p.u. voltage as limitation, a hosting capacity of 60% PV electricity generation as a
fraction of the yearly load was determined for the rural grid and the suburban grid. For the city grid, which is very
robust, a hosting capacity as high as 325% was found. When using overload as limitation, the hosting capacities 20%
25% and 70%, respectively, were determined for the same grids. Also, different methods to increase the hosting
capacity are compared.
Sparsity oracle inequalities for the Lasso
Creators: name: Bunea, Florentina
name: Tsybakov, Alexandre
name: Wegkamp, Marten
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62G08 (Primary) 62C20, 62G05, 62G20 (Secondary)

description: This paper studies oracle properties of $\ell_1$-penalized least squares in nonparametric regression setting with random design. We show that the penalized least squares estimator satisfies sparsity oracle inequalities, i.e., bounds in terms of the number of non-zero components of the oracle vector. The results are valid even when the dimension of the model is (much) larger than the sample size and the regression matrix is not positive definite. They can be applied to high-dimensional linear regression, to nonparametric adaptive regression estimation and to the problem of aggregation of arbitrary estimators.
description: Published at http://dx.doi.org/10.1214/07-EJS008 in the Electronic Journal of Statistics (http://www.i-journals.org/ejs/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Damage Reduction of the Laser Drilling Process on Back Contact Solar Cells by Chemical Treatment
Creators: name: Cereceda, E.
name: Barredo Egusquiza, J.
name: Gutiérrez, J.R.
name: Jimeno, J.C.
name: Fraile, A.
name: Hermanns, L.
Publisher: name: WIP
Year: 2012
Subjects: Wafer-Based Silicon Solar Cells and Materials Technology
Manufacturing Issues and Processing

description: 27th European Photovoltaic Solar Energy Conference and Exhibition; 832-835
description: Production of back contact solar cells requires holes generations on the wafers to keep both positive
and negative contacts on the back side of the cell. This drilling process weakens the wafer mechanically due to the
presence of the holes and the damage introduced during the process as microcracks. In this study, several chemical
processes have been applied to drilled wafers in order to eliminate or reduce the damage generated during this
fabrication step. The treatments analyzed are the followings: alkaline etching during 1, 3 and 5 minutes, acid etching
for 2 and 4 minutes and alkaline texturisation. To determine mechanical strength of the samples a common
mechanical study has been carried out testing the samples by the Ring on Ring bending test and obtaining the stress
state in the moment of failure by FE simulation. Finally the results obtained for each treatment were fitted to a three
parameter Weibull distribution.
Tidal dissipation in binary systems
Creators: name: Zahn, Jean-Paul
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: To first approximation, a binary system conserves its angular momentum while it evolves to its state of minimum kinetic energy: circular orbit, all spins aligned, and components rotating in synchronism with the orbital motion. The pace at which this final state is achieved depends on the physical processes that are responsible for the dissipation of the tidal kinetic energy. For stars (or planets) with an outer convection zone, the dominant mechanism identified so far is the viscous dissipation acting on the equilibrium tide. For stars with an outer radiation zone, it is the radiative damping operating on the dynamical tide. After a brief presentation of the tides, I shall review these physical processes; I shall discuss the uncertainties of their present treatment, describe the latest developments, and compare the theoretical predictions with the observed properties concerning the orbital circularization of close binaries.
description: 24 pages, 11 figures, lecture notes of "Stellar Physics Summer School 2005", on "Tidal effects in stars, planets and disks"
Gravitational Footprints of Black Holes and Their Microstate Geometries
Creators: name: Bah, Ibrahima
name: Bena, Iosif
name: Heidmann, Pierre
name: Li, Yixuan
name: Mayerson, Daniel R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We construct a family of non-supersymmetric extremal black holes and their horizonless microstate geometries in four dimensions. The black holes can have finite angular momentum and an arbitrary charge-to-mass ratio, unlike their supersymmetric cousins. These features make them and their microstate geometries astrophysically relevant. Thus, they provide interesting prototypes to study deviations from Kerr solutions caused by new horizon-scale physics. In this paper, we compute the gravitational multipole structure of these solutions and compare them to Kerr black holes. The multipoles of the black hole differ significantly from Kerr as they depend non-trivially on the charge-to-mass ratio. The horizonless microstate geometries have the same multipoles as their corresponding black hole, with small deviations set by the scale of their microstructure.
description: v2: 26 pages + Appendices, 8 figures, revision of the solutions in section 4.4
Voltage Dips: Verification, Validation and Certification Procedure for PV Installations
Creators: name: Linares, A.
name: Fernández, J.
name: Friend, M.
name: Llarena, E.
name: Montes, C.
name: Moncho, G.
name: Losada, N.
name: González, O.
name: Molina, D.
name: Pío, A.
name: Cendagorta, M.
Publisher: name: WIP
Year: 2012
Subjects: Components for PV Systems
Balance of System Components

description: 27th European Photovoltaic Solar Energy Conference and Exhibition; 3637-3641
description: In Spain, since October 2011 and according to Royal Decree 1565/2010 from the 29th of November,
for all the PV energy production facilities, whether single or grouped, that have an installed power above 2 MW, it is
compulsory that they meet the requirements for response to voltage dips, as per the Operational Procedure P.O. 12.3,
established by the Transmission System Operator and approved in the Resolution dated 4 October 2006 of the
Ministry of Industry Tourism and Trade's General Secretariat of Energy. Such response consists on, for these
facilities, to remain linked to the electricity grid, without becoming disconnected because of falls in voltage directly
associated with correctly offset short circuits that may arise in the electricity system. Also, in order to become
compliant with P.O. 12.3, a specific Verification, Validation and Certification Procedure (PVVC9) was established,
with the purpose of obtaining the corresponding credential, via an accredited body such as the Spanish Association
for Standardization and Certification, AENOR.
The purpose of the present paper is to present the procedure followed in order to obtain the P.O. 12.3 comply
certification, highlighting the technical problems that had to be solved, as well as the associated costs.
Eppstein's bound on intersecting triangles revisited
Creators: name: Nivasch, Gabriel
name: Sharir, Micha
Publisher: name: arXiv
Year: 2008
Subjects: subject: Computational Geometry (cs.CG)
subject: FOS: Computer and information sciences

description: Let S be a set of n points in the plane, and let T be a set of m triangles with vertices in S. Then there exists a point in the plane contained in Omega(m^3 / (n^6 log^2 n)) triangles of T. Eppstein (1993) gave a proof of this claim, but there is a problem with his proof. Here we provide a correct proof by slightly modifying Eppstein's argument.
description: Minor revision following referee's suggestions. To appear in Journal of Combinatorial Theory, Series A. 5 pages, 1 figure
Localization and Mapping using Instance-specific Mesh Models
Creators: name: Feng, Qiaojun
name: Meng, Yue
name: Shan, Mo
name: Atanasov, Nikolay
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: This paper focuses on building semantic maps, containing object poses and shapes, using a monocular camera. This is an important problem because robots need rich understanding of geometry and context if they are to shape the future of transportation, construction, and agriculture. Our contribution is an instance-specific mesh model of object shape that can be optimized online based on semantic information extracted from camera images. Multi-view constraints on the object shape are obtained by detecting objects and extracting category-specific keypoints and segmentation masks. We show that the errors between projections of the mesh model and the observed keypoints and masks can be differentiated in order to obtain accurate instance-specific object shapes. We evaluate the performance of the proposed approach in simulation and on the KITTI dataset by building maps of car poses and shapes.
description: 8 pages, 9 figures
Laser Beam Induced Current for Visual Inspection of Long-Term Exposed PV Crystalline Silicon Modules
Creators: name: Werner, B.A.
name: Müllejans, H.
Publisher: name: WIP
Year: 2012
Subjects: Wafer-Based Silicon Solar Cells and Materials Technology
Silicon Solar Cell Characterization and Modelling

description: 27th European Photovoltaic Solar Energy Conference and Exhibition; 1364-1367
description: Laser Beam Induced Current (LBIC) can be used to generate two dimensional maps of PV
modules. Electrical as well as optical defects generate constant in the image and therefore LBIC can be used to
complement traditional Visual Inspection of (poly-)crystalline PV modules. Here the method is applied to two
modules which had been exposed for nearly 20 years continuously in a natural working environment. The LBIC
maps revealed firstly the location of defective cells within the module and secondly the presence of defective
areas within a specific cell.
Covariant Formulation of the Newton-Hooke Particle and its Canonical Analysis
Creators: name: Banerjee, Rabin
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A covariant formulation for the Newton-Hooke particle is presented by following an algorithm developed by us \cite{BMM1, BMM2, BMM3}. It naturally leads to a coupling with the Newton-Cartan geometry. From this result we provide an understanding of gravitation in a Newtonian geometric background. Using Dirac's constrained analysis a canonical formulation for the Newton-Hooke covariant action is done in both gauge independent and gauge fixed approaches. While the former helps in identifying the various symmetries of the model, the latter is able to define the physical variables. From this analysis a path to canonical quantisation is traced and the Schroedinger equation is derived which is shown to satisfy various consistency checks. Some consequences of this equation are briefly mentioned.
description: 21 pages, No figures, Accepted in Physical Review D
Guidelines for Design, Installation and Maintenance of PV Systems to Achieve the Energy Predictions
Creators: name: Spertino, F.
name: Di Leo, P.
name: Corona, F.
Publisher: name: WIP
Year: 2012
Subjects: PV Systems
Large PV Power Plants and Distributed PV: System Aspects and Grid Connection

description: 27th European Photovoltaic Solar Energy Conference and Exhibition; 4014-4019
description: This work was an important part of the European Project PERSIL (Solar Performance and Local
Industry), joint collaboration between public and private administrations in Italy and France. The activity is twofold:
both the 1-year monitoring results of thirteen PV systems and the subsequent guidelines for the design, installation
and maintenance of grid connected PV systems. The results in terms of performance-ratio parameters show that three
PV plants behave in excellent manner, whereas five PV plants exhibit poor energy production and the remainder has
average behaviour. Within the guidelines for design, the optimum coupling array/inverter and the partial shading of
PV modules have been discussed in detail. Within the guidelines for installation, the PV module/inverter cooling, the
electric cables and enclosures have been dealt with. Finally, within the guidelines for maintenance, the main items
are the energy production assessment, the glass dirt checking and the maintenance of motors in sun-trackers.
Fully Convolutional Geometric Features for Category-level Object Alignment
Creators: name: Feng, Qiaojun
name: Atanasov, Nikolay
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: This paper focuses on pose registration of different object instances from the same category. This is required in online object mapping because object instances detected at test time usually differ from the training instances. Our approach transforms instances of the same category to a normalized canonical coordinate frame and uses metric learning to train fully convolutional geometric features. The resulting model is able to generate pairs of matching points between the instances, allowing category-level registration. Evaluation on both synthetic and real-world data shows that our method provides robust features, leading to accurate alignment of instances with different shapes.
description: 7 pages, 9 figures
Unrecognized Backscattering in Low Energy Beta Spectroscopy
Creators: name: Schumann, M.
name: Abele, H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We present studies on electron backscattering from the surface of plastic scintillator beta detectors. By using a setup of two detectors coaxial with a strong external magnetic field - one detector serving as primary detector, the other as veto-detector to detect backscattering - we investigate amount and spectrum of unrecognized backscattering, i.e. events where only one detector recorded a trigger signal. The implications are important for low energy particle physics experiments.
description: 5 pages, 8 figures; v2: published NIM A version
The Pierre Auger Observatory: Results on Ultra-High Energy Cosmic Rays
Creators: name: Bluemer, Johannes
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The focus of this article is on recent results on ultra-high energy cosmic rays obtained with the Pierre Auger Observatory. The world's largest instrument of this type and its performance are described. The observations presented here include the energy spectrum, the primary particle composition, limits on the fluxes of photons and neutrinos and a discussion of the anisotropic distribution of the arrival directions of the most energetic particles. Finally, plans for the construction of a Northern Auger Observatory in Colorado, USA, are discussed.
description: Proceedings of the International Workshop on Advances in Cosmic Ray Science, Waseda University, Shinjuku, Tokyo, Japan, March 2008; to be published in the Journal of the Physical Society of Japan (JPSJ) supplement
Microscopic properties of vortex state in YB6 probed by muon spin rotation
Creators: name: Kadono, R.
name: Kuroiwa, S.
name: Akimitsu, J.
name: Koda, A.
name: Ohishi, K.
name: Higemoto, W.
name: Otani, S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Local magnetic field distribution B(r) in the mixed state of a boride superconductor, YB6, is studied by muon spin rotation (muSR). A comparative analysis using the modified London model and Ginzburg-Landau (GL) model indicates that the GL model exhibits better agreement with muSR data at higher fields, thereby demonstrating the importance of reproducing the field profile near the vortex cores when the intervortex distance becomes closer to the GL coherence length. The temperature and field dependence of magnetic penetration depth ($λ$) does not show any hint of nonlocal effect nor of low-lying quasiparticle excitation. This suggests that the strong coupling of electrons to the rattling motion of Y ions in the boron cage suggested by bulk measurements gives rise to a conventional superconductivity with isotropic s-wave pairing. Taking account of the present result, a review is provided for probing the anisotropy of superconducting order parameters by the slope of $λ$ against field.
description: 10 pages, 9 figures
Photometric Evaluation of Photovoltaic Thin-Film Shading Elements
Creators: name: Rennhofer, M.
name: Berger, K.
name: Leidl, R.
name: Gerstmann, H.
name: Wascher, H.
name: Aichinger, M.
Publisher: name: WIP
Year: 2012
Subjects: PV Systems
PV and Architecture

description: 27th European Photovoltaic Solar Energy Conference and Exhibition; 4220-4223
description: The national research project „multifunctional plug & play facade“ (MPPF) considers the building
envelope as active part of an overall energetic building concept. Within the MPPF-project innovative photovoltaic
(PV) modules have been installed in a demonstration façade. In this case, PV fulfils the function of a façade element
and of an active energy system. It provides shading and daylight in the interior. Photometric studies have been
performed on different shading systems including PV-panels and conventional shading systems. This allows to
compare different shading systems quantitatively. The investigation shows, that the implementation of shading
systems has direct impact on interior comfort, visual impression and health aspects (e.g. at the office).
The Status and Prospects of Thin-Film PV as Emerging Technology Systems
Creators: name: Gazis, E.
name: Candelise, C.
name: Winskel, M.
name: Gross, R.
Publisher: name: WIP
Year: 2012
Subjects: PV - a Major Electricity Source
Markets

description: 27th European Photovoltaic Solar Energy Conference and Exhibition; 4617-4622
description: Photovoltaics (PV) are currently the prevailing solar energy harvesting technology, and integration of such
systems in the power generation mix has been promoted by several governments through policy intervention. Thin film
(TF) technologies in particular are considered to have the potential for low cost manufacturing and diverse applications
beyond the conventional flat-plate modules. However, future development of the TF PV sector will depend not only on
intrinsic factors including technological advances and market characteristics, but also on the interaction of the sector with
the incumbent power regimes and the pressures from the energy landscape. This paper provides a summary of the
ongoing work on a market assessment and an innovation systems-based analysis of TF PV technologies, with particular
focus on product differentiation for innovative applications. It also offers a novel framework for the analysis and the
understanding of the potential and the barriers for TF innovation within current and evolving PV and energy markets, so
helping to inform policy decisions on TF innovation and niche market management. This work is part of the EPSRC’s
Supergen PV21 Consortium (PV Materials for the 21st Century) and as such it draws upon leading expertise in TF PV
technologies
Receiver Plane Illumination Profiles – Ray Tracing an Extented Light Source through Optical Systems with Variable Misalignment Parameters
Creators: name: Cole, I.R.
name: Gottschalg, R.
Publisher: name: WIP
Year: 2012
Subjects: Material Studies, New Concepts and Ultra-High Efficiency
Terrestrial Concentrator Systems

description: 27th European Photovoltaic Solar Energy Conference and Exhibition; 208-213
description: An approach to simulate illumination patterns incident on the front face of a solar cell is presented. The
illumination patterns are generated by ray tracing an input solar profile through a system of lenses onto a receiver plane.
The model allows the inclusion of solar tracking errors; component alignment and orientation errors; chromatic
aberration; and spectrally dependent transmission losses. Realistic input flux distributions are achieved by treating the
Sun as an inhomogeneous extended light source. The resultant illumination pattern is formatted as a useful input to a 3D
solid state physics model for the investigation of solar cell device performance. Generated illumination patterns are split
into appropriate energetic bands according to user-defined multi-junction cell structures. The effects of chromatic
aberration differ for each band due to the chromatic dependency of the lens refractive index, this can be seen in the band
separated illumination patterns. The optical system modelled herein shows an illumination pattern displacement to linear
tracking error relationship of 11.2mm per degree. Geometric concentration ratios are found to vary as much as 200%
between multi-junction cell associated activation bands. Example illumination patterns are given throughout.
The Effectiveness of Monitoring in Understanding the Real Status of PV Plants
Creators: name: Giussani, M.
name: Guastella, S.
name: Castello, S.
name: Trezza, F.
Publisher: name: WIP
Year: 2012
Subjects: PV Systems
Large PV Power Plants and Distributed PV: System Aspects and Grid Connection

description: 27th European Photovoltaic Solar Energy Conference and Exhibition; 3941-3945
description: This paper presents more than 2 years of monitoring and analysis of operational data from a selected group of PV plants, installed in the frame of Italian “Conto Energia” incentive programme, which are representatives of technologies and kind of installations sharing the market. Module technologies in the considered PV plants are Si-poly, Si-mono and Si-a, while
the installation typologies include free-standing, flat or sloped roof, building integration and sun tracking. The power size of PV generators varies from some kWp to 1 MWp, letting also to compare different kinds of inverter (one or more MPPT sections, string-inverter or centralinverter). The work is aimed at assessing the state of art of installed PV plants, focusing on the energy performance (versus the expected values), but also on arising problems in plant managing. The results of this work supply actual information of PV plant performance and reliability to PV system operators and governmental institutions, as also requested in the governmental decree of “Conto Energia” programme.
Jahn-Teller systems from a cavity QED perspective
Creators: name: Larson, Jonas
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Jahn-Teller systems and the Jahn-Teller effect are discussed in terms of cavity QED models. By expressing the field modes in a quadrature representation, it is shown that certain setups of a two-level system interacting with a bimodal cavity is described by the Jahn-Teller $E\timesε$ Hamiltonian. We identify the corresponding adiabatic potential surfaces and the conical intersection. The effects of a non-zero geometrical Berry phase, governed by encircling the conical intersection, are studied in detail both theoretically and numerically. The numerical analysis is carried out by applying a wave packet propagation method, more commonly used in molecular or chemical physics, and analytic expressions for the characteristic time scales are presented. It is found that the collapse-revival structure is greatly influenced by the geometrical phase and as a consequence, the field intensities contain direct information about this phase. We also mention the link between the Jahn-Teller effect and the Dicke phase transition in cavity QED.
description: 10 pages, 6 figures. Replaced with final version
Enhanced Performance of Multi-Crystalline Solar Cells through Single Step Nanoimprint Processing
Creators: name: Plachetka, U.
name: Windgassen, H.
name: Safiei, A.
name: Khandelwal, R.
name: Kim, J.W.
name: Schlachter, F.
name: Nowak, C.
name: Moormann, C.
name: Kurz, H.
Publisher: name: WIP
Year: 2012
Subjects: Wafer-Based Silicon Solar Cells and Materials Technology
Silicon Solar Cell Improvements

description: 27th European Photovoltaic Solar Energy Conference and Exhibition; 1851-1853
description: In this contribution we propose an add-on process in order to reduce optical losses using a simple
nanotexture post processing. In this simple approach textures on mc-Si were fabricated by an optimized UV-NIL
process after the cells have been fabricated by a standard procedure. There nanostructures improve the coupling of
light into the silicon nitride ARC layer. By this additional texturing the efficiency was further increased by roughly
0.3% adding only one new process step.
title: Psychosocial Interventions for Newly Arrived Adolescent Refugees: A Systematic Review
Creators: name: Hettich, Nora
name: Seidel, Franziska Anna
name: Stuhrmann, Lydia Yao
Publisher: name: Universität Kassel
Year: 2020
Subjects: subject: refugee youth
subject: adolescent refugees
subject: psychosocial interventions
subject: mental heath
subject: initial integration process
subject: systematic review
subject: 150
subject: 300
subject: Flüchtling
subject: Minderjähriger
subject: Erwachsener
subject: Psychosoziale Betreuung
subject: Psychische Gesundheit
subject: Soziale Integration

description: The article “Psychosocial Interventions for Newly Arrived Adolescent Refugees: A Systematic Review” written by Nora Hettich · Franziska Anna Seidel · Lydia Yao Stuhrmann was originally published Online First without Open Access. After publication in volume 5, issue 2, page 99–114 the author decided to opt for Open Choice and to make the article an Open Access publication.
description: Gefördert im Rahmen des Projekts DEAL
Long-Term Experimental Validation of NOCT Method for PV Integration under Several Conditions
Creators: name: Boddaert, S.
name: Chervet, F.
Publisher: name: WIP
Year: 2012
Subjects: PV Systems
Large PV Power Plants and Distributed PV: System Aspects and Grid Connection

description: 27th European Photovoltaic Solar Energy Conference and Exhibition; 3946-3950
description: Electrical and thermal simulations of a building integrated photovoltaic system are currently
undertaken with a transient simulation or at least a steady state program using real experimental data. However
predicted results are obtained with electrical and thermal generic models partially adapted in order to present similar
results as experimental. Even if several studies increase quality of computation with help of better sky temperature
models, better knowledge of irradiance and part global/direct/diffuse, sun path, convective effects, a constant
parameter is used in most research to characterise photovoltaic modules, NOCT parameter, taking into account level
of integration of PV modules as roofing elements. NOCT provides estimation of PV module temperature rise,
evaluated under STC conditions (Standard Test Conditions), in fully ventilated mounting system. Nowadays, NOCT
parameter is currently used as an essential parameter for annual predicting energy production, but solution not really
suitable for photovoltaic components used as roofing materials. The purpose of this work is to validate a experimental
method determining an average PV module temperature according to PV integration system.
Implementation and Performance Analysis of a Low-Cost Flash Test System
Creators: name: Lee, K.-H.
name: Bushnell, D.B.
name: Tibbits, T.N.D.
name: Ekins-Daukes, N.J.
Publisher: name: WIP
Year: 2012
Subjects: Material Studies, New Concepts and Ultra-High Efficiency
Terrestrial Concentrator Systems

description: 27th European Photovoltaic Solar Energy Conference and Exhibition; 205-207
description: Flash testers have many advantages over continuous light source. A flash consumes lower power and is
easier to reach very high concentration without using concentrator optics or heating up the test device. However, a
commercial high concentration flash test system is usually costly and therefore not suitable for academic research
groups with a limited budget. A low-cost flash test system using commercial photographic xenon flash is presented in
this paper. This setup can be used as a standalone system or incorporated into a wafer prober for rapid evaluation of
wafers on the production floor. Although flash testers with different implementations have been reported, no results
of testing multijunction cells using commercial photographic flash at high concentrations are presented yet. In this
paper, we explain the setup in detail and demonstrate the measurement results of multi-junction devices at high
concentrations. We also investigate the sources of measurement error of this system and compare the data measured
by this technique and other methods.