cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
(4,2)-choosability of planar graphs with forbidden structures
Creators: name: Berikkyzy, Zhanar
name: Cox, Christopher
name: Dairyko, Michael
name: Hogenson, Kirsten
name: Kumbhat, Mohit
name: Lidický, Bernard
name: Messerschmidt, Kacy
name: Moss, Kevin
name: Nowak, Kathleen
name: Palmowski, Kevin F.
name: Stolee, Derrick
Publisher: name: arXiv
Year: 2015
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C15, 05C10

description: All planar graphs are 4-colorable and 5-choosable, while some planar graphs are not 4-choosable. Determining which properties guarantee that a planar graph can be colored using lists of size four has received significant attention. In terms of constraining the structure of the graph, for any $\ell \in \{3,4,5,6,7\}$, a planar graph is 4-choosable if it is $\ell$-cycle-free. In terms of constraining the list assignment, one refinement of $k$-choosability is choosability with separation. A graph is $(k,s)$-choosable if the graph is colorable from lists of size $k$ where adjacent vertices have at most $s$ common colors in their lists. Every planar graph is $(4,1)$-choosable, but there exist planar graphs that are not $(4,3)$-choosable. It is an open question whether planar graphs are always $(4,2)$-choosable. A chorded $\ell$-cycle is an $\ell$-cycle with one additional edge. We demonstrate for each $\ell \in \{5,6,7\}$ that a planar graph is $(4,2)$-choosable if it does not contain chorded $\ell$-cycles.
description: 33 pages, 14 figures. Collaboration began in the Iowa State University Discrete Mathematics Working Seminar 2014-2015
Electrical Conduction Process by Impedance Spectroscopy of the Nanostructured Photoabsorbers Cu2SNS3
Creators: name: Lahlali, S.
name: Belaqziz, M.
name: Essaleh, L.
name: Chehouani, H.
name: Djessas, K.
name: Gauffier, J.L.
Publisher: name: WIP
Year: 2016
Subjects: New Materials and Concepts for Solar Cells and Modules
Fundamental Studies

description: 32nd European Photovoltaic Solar Energy Conference and Exhibition; 135-137
description: Conduction mechanism was investigated from DC and AC conductivity measurements in the bulk
ternary semiconductor compound Cu2SnS3 that is prepared by the hydrothermal technique. The complex impedance
spectroscopy in the frequency range 100Hz–1MHz and temperature range 300K–475K is used to study the electrical
properties of this material. The activation energy for conduction and relaxation mechanisms is estimated. The
temperature dependence of relaxation times for grain and grain boundaries contributions are analyzed. From the
equivalent circuit that takes into account the distribution of relaxation times, electrical resistance for the grain and
grain-boundary are determined and their temperature dependence is analyzed.
Unveiling the Effect of Lead Halide on Thermal Stability of Perovskite Solar Cells
Creators: name: Du, Y.
name: Cai, H.
name: Wu, Y.
name: Wen, H.
name: Li, Z.
name: Xu, J.
name: Huang, L.
name: Ni, J.
name: Li, J.
name: Zhang, J.
Publisher: name: WIP
Year: 2016
Subjects: New Materials and Concepts for Solar Cells and Modules
Fundamental Studies

description: 32nd European Photovoltaic Solar Energy Conference and Exhibition; 148-151
description: Sequential deposition methods for preparing CH3NH3PbI3 film are becoming increasingly popular when considering
processing perovskite solar cells (PSCs) under relative relaxed conditions. Correspondingly, the problem concerning PbI2
residue receives special attention due to its deterioration to device performance reproducibility and long-term stability. In
this work, we demonstrate an effective sequential thermal evaporation strategy in low vacuum (STELV) to fabricate
PbI2-free CH3NH3PbI3 film with full coverage and good crystallization. Through a comparative study, it is observed that
STELV has a stronger ability to control morphology and thickness of CH3NH3PbI3 film, alone with good uniformity.
Moreover, we demonstrate that remaining PbI2 film should be responsible for the poor PSCs thermal stability.
Comment on "Elastic Membrane Deformations Govern Interleaflet Coupling of Lipid-Ordered Domains"
Creators: name: Williamson, John J.
name: Olmsted, Peter D.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: In lieu of abstract, first paragraph reads: Galimzyanov et al. [1] find that line tension between thick liquid-ordered ($L_{o}$) and thinner liquid-disordered ($L_{d}$) registered lipid bilayer phases is minimised by an asymmetric "slip region", length $L\!\sim\!5\,\textrm{nm}$ (Fig. 1). They claim that line tensions alone explain domain registration, without "direct" (area-dependent) inter-leaflet interaction [2,3]. We show this is unfounded, without direct interaction their results would predict \textit{antiregistration}, dependent on composition. To find equilibrium from line energies, line \textit{tensions} must be combined with interfacial lengths for given states at given composition. This was not done in [1].
description: Comment and Reply appear in PRL 116, 079801 (2016)
The ODISSEI Portal: building a metadata repository for the social sciences in the Netherlands
Creators: name: Maineri, Angelica Maria
Publisher: name: Zenodo
Year: 2023

description: Social science research increasingly relies on the use of interlinked data sources, whereby survey data deposited at national or institutional repositories can be linked to data from other sources, e.g. administrative data stored at statistical offices or commercial data made available by private companies. Most of these data sources are highly sensitive and subject to restricted access conditions. Moreover, these diverse data sources are scattered across various repositories, are documented using different standards, and lack standardised access requirements. The goal of the ODISSEI Portal is to make diverse data sources available through a single search interface by leveraging metadata, therefore leaving data providers in control of the access to their datasets. The ODISSEI Portal consists of three components: first, metadata of studies and variables from different providers is ingested, harmonised, and enriched using semantic artefacts such as multilingual thesauri. Second, the enriched metadata is used to build a knowledge graph that powers an enhanced search functionality. Third, a data access broker enables users to request access to a dataset from the ODISSEI Portal interface, and forwards the request to the data providers for validation. The data access broker relies on a set of machine-readable access conditions and licences designed to specify additional provisions that often apply to sensitive datasets and are not covered by existing solutions. During the presentation, the development of the three components of the Portal will be illustrated. The lessons learnt can benefit the wider community, especially for what concerns (1) the collaboration with a diverse array of partners (including social scientists, computer scientists, and software developers); (2) the harmonisation of study- and variable-level metadata using DDI; (3) the adaptations implemented in the DataVerse instance the ODISSEI Portal is hosted on. A prototype of the ODISSEI Portal is already publicly available (https://portal.odissei.nl/).
description: The ODISSEI Portal is developed within a Roadmap Project funded by the Dutch Research Council (NWO) under grant number 184.035.014.
The Influence of the Exciton Nonradiative Recombination in Silicon on the Photoconversion Efficiency
Creators: name: Sachenko, A.V.
name: Kostylyov, V.P.
name: Vlasiuk, V.M.
name: Sokolovskyi, I.O.
name: Evstigneev, M.
Publisher: name: WIP
Year: 2016
Subjects: New Materials and Concepts for Solar Cells and Modules
Fundamental Studies

description: 32nd European Photovoltaic Solar Energy Conference and Exhibition; 141-147
description: By comparison of the experimental dependence of bulk lifetime in silicon on the doping and excitation
levels with theoretical calculations, it is shown that a new recombination channel becomes operative when Shockley-
Read-Hall lifetime is below 20 ms and the density of doping impurities or the excess electron-hole pair density is of
the order of 1016 cm-3. This recombination mechanism is related to the non-radiative exciton Auger recombination
assisted by the deep impurities in the bulk. The influence of non-radiative exciton recombination on the
photoconversion efficiency in solar cells is analyzed. It is shown that the shorter the Shockley-Read-Hall lifetime,
SRH, the stronger its effect. In particular, for SRH = 100 μs, this recombination channel leads to the reduction of
photoconversion efficiency by 5.5 %, whereas for SRH ≈ 1 μs, the photoconversion efficiency is about twice as small
as the value obtained without taking non-radiative exciton recombination into account.
Back in the PV Galaxy: the Return of the Silicone Module
Creators: name: Beaucarne, G.
name: Wang, S.
name: Sun, X.
name: Wu, Y.
name: Huang, Y.
name: Shephard, N.
Publisher: name: WIP
Year: 2016
Subjects: New Materials and Concepts for Solar Cells and Modules
New Materials and Concepts for Modules

description: 32nd European Photovoltaic Solar Energy Conference and Exhibition; 89-93
description: Early PV modules mostly used silicone as encapsulant, which resulted in very durable and reliable
modules. However, silicone encapsulation was replaced at the end of the eighties by EVA for process and cost
reasons. Thanks to the simultaneous emergence of a market for very robust and durable modules (long lifetime utility
modules, sunbelt region modules, tropical region modules) and the development of specific silicones and
encapsulation processes meeting the requirements of modern PV manufacturing, silicone encapsulated panels have
become again a feasible and attractive technology option. Double glass modules with silicone encapsulation have
recently been launched and are now mass produced and globally commercialized. The combination of the glass-glass
structure and silicone is shown to lead to exceptional durability in accelerated aging tests.
Non-adiabatic dynamics of molecules in optical cavities
Creators: name: Kowalewski, Markus
name: Bennett, Kochise
name: Mukamel, Shaul
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Strong coupling of molecules to the vacuum field of micro cavities can modify the potential energy surfaces opening new photophysical and photochemical reaction pathways. While the influence of laser fields is usually described in terms of classical field, coupling to the vacuum state of a cavity has to be described in terms of dressed photon-matter states (polaritons) which require quantized fields. We present a derivation of the non-adiabatic couplings for single molecules in the strong coupling regime suitable for the calculation of the dressed state dynamics. The formalism allows to use quantities readily accessible from quantum chemistry codes like the adiabatic potential energy surfaces and dipole moments to carry out wave packet simulations in the dressed basis. The implications for photochemistry are demonstrated for a set of model systems representing typical situations found in molecules.
Complex structures of dense lithium: electronic origin
Creators: name: Degtyareva, Valentina
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Lithium - the lightest alkali metal - exhibits unexpected structures and electronic behaviour at high pressures. As the heavier alkalis, Li is bcc at ambient pressure and transforms first to fcc (at 7.5 GPa). The post-fcc high-pressure form Li-cI16 (at 40-60 GPa) is similar to Na-cI16 and related to more complex structures of heavy alkalis Rb-oC52 and Cs-oC84. The other high pressure phases for Li (oC88, oC40, oC24) found at pressures up to 130 GPa are specific the only to Li. The different route of Li high-pressure structures correlates with its special electronic configuration containing the only 3 electrons (at 1s and 2s levels). Crystal structures for Li are analyzed within the model of Fermi sphere - Brillouin zone interactions. Stability of post-fcc structures for Li can be supported by Hume-Rothery arguments when new Brillouin zone plains appear close to the Fermi level producing pseudogaps near the Fermi level and decreasing the crystal energy. The filling of Brillouin-Jones zones by electron states for a given structure defines the physical properties as optical reflectivity, electrical resistivity and superconductivity. To understand complexity of structural and physical properties of Li above 60 GPa is necessary to assume the valence electrons band overlap with the upper core electrons and increase the valence electron count under compression.
description: XXXI International Conference on Equations of State for Matter, March 1-6, 2016, Elbrus, Kabardino-Balkaria, Russia
Endocrine disturbances in affective disorders and schizophrenia : a selected review of the literature
Creators: name: Copolov, David L.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Extracting constraints from direct detection searches of supersymmetric dark matter in the light of null results from the LHC in the squark sector
Creators: name: Riffard, Q.
name: Mayet, F.
name: Bélanger, G.
name: Genest, M. -H.
name: Santos, D.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The comparison of the results of direct detection of Dark Matter, obtained with various target nuclei, requires model-dependent, or even arbitrary, assumptions. Indeed, to draw conclusions either the spin-dependent (SD) or the spin-independent (SI) interaction has to be neglected. In the light of the null results from supersymmetry searches at the LHC, the squark sector is pushed to high masses. We show that for a squark sector at the TeV scale, the framework used to extract contraints from direct detection searches can be redefined as the number of free parameters is reduced. Moreover, the correlation observed between SI and SD proton cross sections constitutes a key issue for the development of the next generation of Dark Matter detectors.
description: Figure 3 has been updated. Conclusions unchanged
Investigation of Thermomechanical Stress in Solar Cells with Multi Busbar Interconnection by Finite Element Modeling
Creators: name: Rendler, L.C.
name: Kraft, A.
name: Ebert, C.
name: Wiese, S.
name: Eitner, U.
Publisher: name: WIP
Year: 2016
Subjects: New Materials and Concepts for Solar Cells and Modules
New Materials and Concepts for Modules

description: 32nd European Photovoltaic Solar Energy Conference and Exhibition; 94-98
description: The interconnection of silicon solar cells by soldering causes thermomechanical stress due to different
coefficients of thermal expansion of the materials involved, especially copper and silicon. In contrast to the current
standard interconnection technology, using three to five flat ribbons to be soldered on continuous or segmented
busbars on the solar cells front side and on large contact pads on the solar cells rear side, the Multi Busbar concept
uses twelve to fifteen round solder coated copper wires to be soldered on a large number of small contact pads for
each polarity.
In this paper we present two finite element models, one for a solar cell with a common busbar-based interconnection
and a second one for a solar cell using the Multi Busbar interconnection approach to analyze and compare the
distribution of the thermomechanical stress induced by the cell interconnection. The results show only a slight
vertical deformation of a contacted solar cell of 0.4 mm for the three busbar design and 2.2 mm for the Multi Busbar
interconnection technology due to the non-symmetric pad layout and the aluminum metallization on the rear side.
However, most parts of the copper interconnector (ribbons and wires) are plastically deformed because the tensile
stress exceeds the yield strength of 100 MPa. In addition, the results indicate that there is only slight tensile stress in
most parts of the silicon solar cell after the soldering process. For both interconnection technologies we detect local
stress peaks and, on the rear side of the solar cells near the outermost contacts, we determine areas where the tensile
stress reaches levels above 200 MPa that potentially cause defects.
Pulse Shaping Diversity to Enhance Throughput in Ultra-Dense Small Cell Networks
Creators: name: Jafari, Amir H.
name: Venkateswaran, Vijay
name: Lopez-Perez, David
name: Zhang, Jie
Publisher: name: arXiv
Year: 2016
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Spatial multiplexing (SM) gains in multiple input multiple output (MIMO) cellular networks are limited when used in combination with ultra-dense small cell networks. This limitation is due to large spatial correlation among channel pairs. More specifically, it is due to i) line-of-sight (LOS) communication between user equipment (UE) and base station (BS) and ii) in-sufficient spacing between antenna elements. We propose to shape transmit signals at adjacent antennas with distinct interpolating filters which introduces pulse shaping diversity eventually leading to improved SINR and throughput at the UEs. In this technique, each antenna transmits its own data stream with a relative offset with respect to adjacent antenna. The delay which must be a fraction of symbol period is interpolated with the pulse shaped signal and generates a virtual MIMO channel that leads to improved diversity and SINR at the receiver. Note that non-integral sampling periods with inter-symbol interference (ISI) should be mitigated at the receiver. For this, we propose to use a fractionally spaced equalizer (FSE) designed based on the minimum mean squared error (MMSE) criterion. Simulation results show that for a 2x2 MIMO and with inter-site-distance (ISD) of 50 m, the median received SINR and throughput at the UE improves by a factor of 11 dB and 2x, respectively, which verifies that pulse shaping can overcome poor SM gains in ultra-dense small cell networks.
description: Accepted to 17th IEEE International Workshop on Signal Processing Advances in Wireless Communications
On some Symmetry Axioms in Relativity Theories
Creators: name: Székely, Gergely
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: Logic (math.LO)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 03B30, 83A02, 83C02

description: In this paper we review two symmetry axioms of special relativity and their connections to each other together with their role in some famous predictions of relativity theory, such as time dilation, length contraction, and the twin paradox. We also discuss briefly counterparts of these symmetry axioms in general relativity and formulate a conjecture, namely that without them the axioms of general relativity would capture general relativistic spacetimes only up to conformal equivalence.
description: 15 pages, 1 figure
Positronium energy levels at order $m α^7$: Product contributions in the two-photon-annihilation channel
Creators: name: Adkins, Gregory S.
name: Tran, Lam M.
name: Wang, Ruihan
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Ongoing improvements in the measurement of positronium transition intervals motivate the calculation of the $O(m α^7)$ corrections to these intervals. In this work we focus on corrections to the spin-singlet parapositronium energies involving virtual annihilation to two photons in an intermediate state. We have evaluated all contributions to the positronium S-state energy levels that can be written as the product of a one-loop correction on one side of the annihilation event and another one-loop correction on the other side. These effects contribute $ΔE = -0.561971(25) m α^7/π^3$ to the parapositronium ground state energy.
description: 11 pages, 4 figures
Multi-User Reconfigurable Intelligent Surface-Aided Communications Under Discrete Phase Shifts
Creators: name: Jiang, Wei
name: Schotten, Hans Dieter
Publisher: name: arXiv
Year: 2023
Subjects: subject: Information Theory (cs.IT)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper focuses on studying orthogonal and non-orthogonal multiple access in intelligent reflecting surface (IRS)-aided systems. Unlike most prior works assuming continuous phase shifts, we employ the practical setup where only a finite number of discrete phase shifts are available. To maximize the sum rate, active beamforming and discrete reflection need to be jointly optimized. We therefore propose an alternative optimization method to get the optimal continuous phase shifts iteratively, and then quantize each phase shift to its nearest discrete value. The sum-rate maximization of different schemes is theoretically analyzed and numerically evaluated with different numbers of phase-control bits.
description: 2022 IEEE International Workshop Technical Committee on Communications Quality and Reliability (CQR)
Nonlinear Generalization of Den Hartog's Equal-Peak Method
Creators: name: Habib, Giuseppe
name: Detroux, Thibaut
name: Viguié, Regis
name: Kerschen, Gaetan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Dynamical Systems (math.DS)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: This study addresses the mitigation of a nonlinear resonance of a mechanical system. In view of the narrow bandwidth of the classical linear tuned vibration absorber, a nonlinear absorber, termed the nonlinear tuned vibration absorber (NLTVA), is introduced in this paper. An unconventional aspect of the NLTVA is that the mathematical form of its restoring force is tailored according to the nonlinear restoring force of the primary system. The NLTVA parameters are then determined using a nonlinear generalization of Den Hartog's equal-peak method. The mitigation of the resonant vibrations of a Duffing oscillator is considered to illustrate the proposed developments.
Models for Lambertian Optics in Si
Creators: name: Abenante, L.
name: Izzi, M.
Publisher: name: WIP
Year: 2016
Subjects: New Materials and Concepts for Solar Cells and Modules
Fundamental Studies

description: 32nd European Photovoltaic Solar Energy Conference and Exhibition; 115-117
description: We review the available models for Lambertian optics in Si solar cells with surface texture. We check
these models in devices having same structure and assignments to transport and optical parameters and different
depth. Based on the check, we infer that, in Si solar cells with surface texture, the standard model for Lambertian optics,
where the light-propagation angle is equal to 60° at all passes of light across the considered device, is more reliable
than the remaining models, in the case of thin devices.
Hartree-Fock Many-Body Perturbation Theory for Nuclear Ground-States
Creators: name: Tichai, Alexander
name: Langhammer, Joachim
name: Binder, Sven
name: Roth, Robert
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We investigate the order-by-order convergence behavior of many-body perturbation theory (MBPT) as a simple and efficient tool to approximate the ground-state energy of closed-shell nuclei. To address the convergence properties directly, we explore perturbative corrections up to 30th order and highlight the role of the partitioning for convergence. The use of a simple Hartree-Fock solution to construct the unperturbed basis leads to a convergent MBPT series for soft interactions, in contrast to, e.g., a harmonic oscillator basis. For larger model spaces and heavier nuclei, where a direct high-order MBPT calculation in not feasible, we perform third-order calculation and compare to advanced ab initio coupled-cluster calculations for the same interactions and model spaces. We demonstrate that third-order MBPT provides ground-state energies for nuclei up into tin isotopic chain that are in excellent agreement with the best available coupled-cluster results at a fraction of the computational cost.
description: 6 pages, 5 figures, 1 table
Fuel cell electrodes from organometallic Pt precursors: an easy atmospheric plasma approach
Creators: name: Merche, Delphine
name: Dufour, Thierry
name: Baneton, Joffrey
name: Caldarella, Giuseppe
name: Debaille, Vinciane
name: Job, Nathalie
name: Reniers, François
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: An organometallic powder (platinum (II) acetylacetonate) is decomposed in the post-discharge of an atmospheric RF plasma torch to deposit Pt nanoparticles on carbon black supports. The resulting nanohybrid materials are characterized by FEG-SEM and XPS techniques to highlight their high content in Pt, their oxidation degree, and the dispersion of the Pt nanoparticles on the substrate. ICP-MS and electrochemical characterizations in a single fuel cell (cyclic voltammetry, dynamic polarization curves) are also performed on electrodes realized by treating the powder mixture overlaid on gas diffusion layers. The comparison of the catalytic activity and the Pt loading with commercially available electrodes shows the great potential of this simple innovative, fast, and robust deposition method.
Bell operator and Gaussian squeezed states in noncommutative quantum mechanics
Creators: name: Bastos, Catarina
name: Bernardini, Alex E.
name: Bertolami, Orfeu
name: Dias, Nuno Costa
name: Prata, João Nuno
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: One examines putative corrections to the Bell operator due to the noncommutativity in the phase-space. Starting from a Gaussian squeezed envelop whose time evolution is driven by commutative (standard quantum mechanics) and noncommutative dynamics respectively, one concludes that, although the time evolving covariance matrix in the noncommutative case is different from the standard case, the squeezing parameter dominates and there are no noticeable noncommutative corrections to the Bell operator. This indicates that, at least for squeezed states, the privileged states to test Bell correlations, noncommutativity versions of quantum mechnics remains as non-local as quantum mechanics itself.
description: 16 pages
Magnetic phase diagram and multiple field-induced states in the intermetallic triangular-lattice antiferromagnet NdAuAl$_4$Ge$_2$ with Ising-like spins
Creators: name: Cong, Mengru
name: Ge, Han
name: Zhang, Lei
name: Ren, Weijun
name: Zhao, Nan
name: Li, Tiantian
name: Wang, Shanmin
name: Zhu, Jinlong
name: Mei, Jiawei
name: Zhang, Qiang
name: Sheng, Jieming
name: Gao, Fei
name: Li, Bing
name: Zhang, Zhidong
name: Wu, Liusuo
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Geometrical frustration and the enhancement of strong quantum fluctuations in two-dimensional triangular antiferromagnets can lead to various intriguing phenomena. Here, we studied the spin-1/2 triangular lattice antiferromagnet NdAuAl$_4$Ge$_2$. Thermodynamic and transport properties, such as magnetization and specific heat together with the resistivity measurements were performed. In zero field, two successive phase transitions were observed at $T_{\rm N1}=1.75\pm 0.02$ K and $T_{\rm N2}=0.49\pm 0.02$ K, respectively. Under magnetic field, $\rm XXZ$-type anisotropy was revealed, with the moments pointing along the easy $c$ axis. For $B\parallel c$, multiple field-induced states were observed, and the magnetic phase diagram was established based on the specific heat and magnetization data. The temperature-dependent resistivity measurements indicate that NdAuAl$_4$Ge$_2$ is a good metal. It is very likely that both the long-range RKKY interactions and the geometrical frustration play an important roles in this case.
description: 9 pages, 7 figures
Lepton mass and mixing in a Neutrino Mass Model based on $S_4$ flavor symmetry
Creators: name: Vien, V. V.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study a neutrino mass model based on $S_4$ flavor symmetry which accommodates lepton mass, mixing with non-zero $θ_{13}$ and CP violation phase. The spontaneous symmetry breaking in the model is imposed to obtain the realistic neutrino mass and mixing pattern at the tree- level with renormalizable interactions. Indeed, the neutrinos get small masses from one $SU(2)_L$ doubplet and two $SU(2)_L$ singlets in which one being in $\underline{2}$ and the two others in $\underline{3}$ under $S_4$ with both the breakings $S_{4}\rightarrow S_3$ and $S_{4}\rightarrow Z_3$ are taken place in charged lepton sector and $S_4\rightarrow \mathcal{K}$ in neutrino sector. The model also gives a remarkable prediction of Dirac CP violation $δ_{CP}=\fracπ{2}$ or $-\fracπ{2}$ in the both normal and inverted spectrum which is still missing in the neutrino mixing matrix. The relation between lepton mixing angles is also represented.
description: 24 pages, 6 figures, to be published in IJMPLA
Spin-to-orbital angular momentum conversion in dielectric metasurfaces
Creators: name: Devlin, Robert Charles
name: Ambrosio, Antonio
name: Wintz, Daniel
name: Oscurato, Stefano Luigi
name: Zhu, Alexander Yutong
name: Khorasaninejad, Mohammadreza
name: Oh, Jaewon
name: Maddalena, Pasqualino
name: Capasso, Federico
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Spin-to-orbital-angular-momentum conversion has attracted considerable interest as a tool to create exotic light beams, leading to the emergence of novel devices that implement this function. These converters exploit the geometrical phase to create helical beams of handedness determined by the chirality of the incident light. This property is finding important applications in quantum optics thanks to the demonstration of liquid crystal spin-to-orbital angular momentum converters (SOC) known as q-plates. Here we demonstrate high-efficiency SOCs in the visible based on dielectric metasurfaces that generate vortex beams with high and even fractional topological charge and show for the first time the simultaneous generation of collinear helical beams with different and arbitrary orbital angular momentum. We foresee that this versatile method of creating vortex beams, which circumvents the limitations of q-plates, will significant impact microscopy and vector beam shaping.
Novel Conductive Adhesive Concept for Solar Module Manufacturing
Creators: name: Helland, S.
name: Kristiansen, H.
name: Jonsson, P.-E.
name: Helland, T.
name: Kalland, E.
name: Redford, K.
Publisher: name: WIP
Year: 2016
Subjects: New Materials and Concepts for Solar Cells and Modules
New Materials and Concepts for Modules

description: 32nd European Photovoltaic Solar Energy Conference and Exhibition; 105-109
description: Mosaic Solutions AS is developing a novel concept for conductive adhesives for use in electrical
interconnection of solar modules. The goal is to provide an alternative to the current soldering process in module
manufacturing, enabling lower process temperatures and reducing the amount of toxic elements, e.g. lead. The
conductive adhesive is based on replacing solid silver flakes by polymer particles coated with a thin layer of silver.
The main advantage of this concept, compared to conventional conductive adhesives, is a typical ten-fold reduction in
silver consumption. We have investigated the electrical properties of conductive adhesives based on silver-coated
polymer particles, and demonstrated the use of the conductive adhesive concept in module manufacturing. The results
are promising, showing that the electrical conductivity is more than sufficient for use in solar modules, and that our
conductive adhesive concept represents a promising and realistic alternative to soldering.
Results on Module Integration of IBC Solar Cells Based on the Conductive Backsheet Approach
Creators: name: Halm, A.
name: De Gier, B.
name: Schneider, A.
name: Mihailetchi, V.D.
name: Koduvelikulathu, L.J.
name: Galbiati, G.
name: Chu, H.
name: Roescu, R.
name: Libal, J.
name: Van Ommen, N.
name: Kopecek, R.
Publisher: name: WIP
Year: 2016
Subjects: New Materials and Concepts for Solar Cells and Modules
New Materials and Concepts for Modules

description: 32nd European Photovoltaic Solar Energy Conference and Exhibition; 53-55
description: We present here results on 60-cell modules assembled with 6 inch n-type interdigitated back contact
(IBC) solar cells which were accomplished in close collaboration between ISC Konstanz, who developed an
industrial process to fabricate IBC cells which we call Zebra cells [1] and Eurotron BV, who supplies equipment for
back contact module assembly and processed Zebra cells into 60-cell modules. Interconnection is realized by
electrically conductive adhesive (ECA) gluing of cells to a conductive copper backsheet. The module sandwich is
laminated with commercially available encapsulation material in a standard laminator. We assembled three 60-cell
modules so far reaching 294 W, 298 W and 303 W peak power at 1 sun respectively. The cell to module (CTM)
power losses ranges between 1.1 to 1.8% relative which is an excellent result taking into account the absence of ISC
gain due to finger reflection which eases the CTM loss for modules assembled with front contacted solar cells.
Contact-Free Raman Spectroscopic Measurement of Residual Stress in Silicon Solar Cells Caused by Stringing
Creators: name: Neumaier, L.
name: Mühleisen, W.
name: Fischer, T.
name: Scheurer, J.
name: Pranger, W.
name: Hirschl, C.
Publisher: name: WIP
Year: 2016
Subjects: New Materials and Concepts for Solar Cells and Modules
Fundamental Studies

description: 32nd European Photovoltaic Solar Energy Conference and Exhibition; 123-126
description: With the current trend in the photovoltaic industry towards thinner solar cells and four (or more) busbar
modules, the cell-interconnection/stringing process is becoming more challenging. Besides the possibility of
damaging solar cells during the soldering process itself, thermal and mechanical stresses within this process step are
also assumed to induce cracks, which are occurring later during the operation of the PV module under certain
environmental conditions, such as heavy snow or wind loads and excessive temperature fluctuations. In order to
produce reliable high-quality PV modules at sound costs, it is necessary to minimize the stress on the solar cells
during the manufacturing process. Within this study Raman spectroscopy is utilized to analyze the stress of solar cells
induced by the interconnection process. Besides investigations on manually soldered solar cells, also industrially
interconnected solar cells were evaluated. Here, an industrial soldering as well as a glueing/bonding interconnection
technique was analyzed. All investigated solar cells are based on three busbars technology.
Small Unit Compound Modules: a New Approach for Light Weight PV Modules
Creators: name: Nussbaumer, H.
name: Klenk, M.
name: Keller, N.
Publisher: name: WIP
Year: 2016
Subjects: New Materials and Concepts for Solar Cells and Modules
New Materials and Concepts for Modules

description: 32nd European Photovoltaic Solar Energy Conference and Exhibition; 56-60
description: A new concept for light weight solar modules is presented in this paper. The main difference to the
common module type is the replacement of the frame at the laminates fringe by a lattice-like structure at the rear or at
the rear and front side. Due to the smaller distances between the mechanical supporting elements the stiffness of the
laminate itself can be reduced to a minimum, enabling the use of thin glass or alternative materials like for example
polymer foils.
In our quest to provide "health for all", are we providing ineffective rehabilitation to improve mobility and balance outcome measures in hemiplegia : a randomised controlled trial of the impact of community based rehabilitation on people with hemiplegia in Indonesia?
Creators: name: Jennings, Kim.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Electrical and Optical Performances of Silicon Solar Cells Modulated by Plasmonics Scattering of Silver and Indium Nanoparticles
Creators: name: Weng, S.-H.
name: Ho, W.-J.
name: Lee, Y.-Y.
name: Hu, C.-H.
name: Wang, W.-L.
name: Deng, Y.-J.
name: Shiao, H.-P.
Publisher: name: WIP
Year: 2016
Subjects: New Materials and Concepts for Solar Cells and Modules
New Materials and Concepts for Cells

description: 32nd European Photovoltaic Solar Energy Conference and Exhibition; 69-72
description: The electrical and optical performances of plasmonic silicon (Si) solar cells with a matrix comprising
a pattern of silver nanoparticles (Ag-NPs) surrounded by indium nanoparticles (In-NPs) to modulate plasmonics light
scattering as well as enhanced photovoltaic performance are demonstrased. The plasmonic light scattering induced by
Ag-NP/In-NP matrices with various degrees of coverage were examined by electrical and optical measurements. The
surface plasmon Raman scattering of Ag-NPs and In-NPs was characterized before investigating the plasmonic light
scattering produced by a matrix of Ag-NPs and In-NPs in a Si solar cell. We also measured the optical reflectance
and external quantum efficiency (EQE) response of various plasmonic solar cells. We achieved impressive results
with regard to plasmonic light scattering through the implementation of a matrix that included Ag-NP coverage of
20% and In-NP coverage of 80% over an area of 16 mm2. This resulted in a 9.93% increase in short-circuit current
density (Jsc) (from 31.91 mA/cm2 to 35.08 mA/cm2) and a 10.12% increase in conversion efficiency () (from
13.04% to 14.36%), compared to a reference cells with uniformly distributed Ag-NPs.
Numerical semigroups in a problem about economic incentives for consumers
Creators: name: Robles-Pérez, Aureliano M.
name: Rosales, José Carlos
Publisher: name: arXiv
Year: 2016
Subjects: subject: Group Theory (math.GR)
subject: Discrete Mathematics (cs.DM)
subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: Primary 20M14, 68R10, Secondary 11P99, 11D07

description: Motivated by a promotion to increase the number of musical downloads, we introduce the concept of $C$-incentive and show an algorithm that compute the smallest $C$-incentive containing a subset $X \subseteq {\mathbb N}$. On the other hand, in order to study $C$-incentives, we see that we can focus on numerical $C$-incentives. Then, we establish that the set formed by all numerical $C$-incentives is a Frobenius pseudo-variety and we show an algorithmic process to recurrently build such a pseudo-variety.
Holistic Influence Maximization: Combining Scalability and Efficiency with Opinion-Aware Models
Creators: name: Galhotra, Sainyam
name: Arora, Akhil
name: Roy, Shourya
Publisher: name: arXiv
Year: 2016
Subjects: subject: Social and Information Networks (cs.SI)
subject: Databases (cs.DB)
subject: FOS: Computer and information sciences
subject: H.2.8

description: The steady growth of graph data from social networks has resulted in wide-spread research in finding solutions to the influence maximization problem. In this paper, we propose a holistic solution to the influence maximization (IM) problem. (1) We introduce an opinion-cum-interaction (OI) model that closely mirrors the real-world scenarios. Under the OI model, we introduce a novel problem of Maximizing the Effective Opinion (MEO) of influenced users. We prove that the MEO problem is NP-hard and cannot be approximated within a constant ratio unless P=NP. (2) We propose a heuristic algorithm OSIM to efficiently solve the MEO problem. To better explain the OSIM heuristic, we first introduce EaSyIM - the opinion-oblivious version of OSIM, a scalable algorithm capable of running within practical compute times on commodity hardware. In addition to serving as a fundamental building block for OSIM, EaSyIM is capable of addressing the scalability aspect - memory consumption and running time, of the IM problem as well. Empirically, our algorithms are capable of maintaining the deviation in the spread always within 5% of the best known methods in the literature. In addition, our experiments show that both OSIM and EaSyIM are effective, efficient, scalable and significantly enhance the ability to analyze real datasets.
description: ACM SIGMOD Conference 2016, 18 pages, 29 figures
Solar Grade III-V Substrates for Cost Effective High Efficiency Photovoltaics
Creators: name: Sun, Y.-T.
name: Omanakuttan, G.
name: Reuterskiöld Hedlund, C.
name: Hammar, M.
name: Lourdudoss, S.
Publisher: name: WIP
Year: 2016
Subjects: New Materials and Concepts for Solar Cells and Modules
New Materials and Concepts for Cells

description: 32nd European Photovoltaic Solar Energy Conference and Exhibition; 80-84
description: Solar grade III-V substrate is a virtual III-V/Si substrate consisting of high crystalline quality III-V
semiconductor with direct III-V/Si heterojunction on Si substrate, which can be the key to realize high efficiency Si
based tandem solar cell at a competitive cost. Recently, corrugated epitaxial lateral overgrowth (CELOG) was used to
fabricate high quality InP on Si with atomically abrupt interface. In this work CELOG based fabrication technology
of solar grade InP substrate comprising n-InP/p-Si type II heterojunction or n+-InP/n-Si ohmic heterojunction was
developed in hydride vapor phase epitaxy (HVPE) reactor. The structural, optical and electrical properties of the
InP/Si heterojunctions were systematically studied by scanning electron microscopy (SEM), photoluminescence (PL),
transmission electron microscopy (TEM) and current-voltage (I-V) techniques. Photodiode devices based on solar
grade InP/Si substrate were demonstrated. Exploitation of the solar grade III-V substrate technology will pave the
way to achieve the Si PV cell with efficiency beyond the level of 30% at a competitive cost.
Photovoltaic-Performance-Enhancing Patch with Combined Light Trapping and Spectral Upconverting Effect
Creators: name: Desta, D.
name: Eriksen, E.
name: Bellettato, M.
name: Rizzoli, R.
name: Summonte, C.
name: Jeppesen, B.R.
name: Jensen, P.B.
name: Madsen, S.P.
name: Nylandsted Larsen, A.
name: Balling, P.
name: Ram, S.K.
Publisher: name: WIP
Year: 2016
Subjects: New Materials and Concepts for Solar Cells and Modules
New Materials and Concepts for Cells

description: 32nd European Photovoltaic Solar Energy Conference and Exhibition; 66-68
description: In this article, we demonstrate a patch, which contains upconverting crystals of Gd2O2S:Yb3+, Er3+ mixed with a
UV curable gel, integrated with a textured back-reflector that can be externally affixed to a bifacial thin-film silicon
solar cell. The patch serves to provide the benefit of light trapping as well as spectrum upconversion to the solar cell
fabricated on a flat substrate. Upconverting patches with different textures were studied for their effectiveness in
enhancing the short-circuit current density of the solar cell and for the relationship between the current enhancement
and the intensity of the incident light. The upconverting patch is shown to enhance the solar cell performance and offers
a new stick-on technique to apply upconversion-based strategies to existing solar cells. The photogenerated short-circuit
current densities of the solar cell show a power-law dependence on the illuminated laser light intensity when an
upconverter patch is attached to the solar cell (exponent 1.5-1.6) while a linear dependence is observed for the solar cell
without the upconverter patch.
Al-Back Surface Field-Type Crystalline Si-Based Smart Stack Triple-Junction (InGaP/GaAs/Si) Cells
Creators: name: Mizuno, H.
name: Makita, K.
name: Tayagaki, T.
name: Mochizuki, T.
name: Kida, Y.
name: Sugaya, T.
name: Takato, H.
Publisher: name: WIP
Year: 2016
Subjects: New Materials and Concepts for Solar Cells and Modules
New Materials and Concepts for Cells

description: 32nd European Photovoltaic Solar Energy Conference and Exhibition; 73-75
description: Smart stack is a handy method to construct multi-junction architectures through the interconnection of
different types of solar cells using a Pd nanoparticle array as a bonding mediator. In this study, a triple-junction cell
was fabricated from a InGaP/GaAs-based double-junction and a crystalline Si-based single-junction subcell using the
smart stack approach. The simplest, matured, and widely-used Al-back surface field-type structure was particularly
focused on for the Si bottom cell, and despite that, a promising efficiency of 20.9% was achieved as a smart stack
InGaP/GaAs/Si device [short-circuit current density (Jsc), open-circuit voltage, and fill factor, were 9.65 mA/cm2,
2.75 V, and 0.790, respectively]. The EQE analysis of the smart stack cell was also carried out, which suggested that
the device performance was limited by the Jsc generated at the GaAs subcell. Therefore, higher efficiencies are
feasible through a regorous design and adjustment of each subcell, especially in terms of current matching.
Photoresponse Properties of BaSi2 Film Grown on Si (100) by Vacuum Evaporation
Creators: name: Trinh, C.T.
name: Nakagawa, Y.
name: Hara, K.O.
name: Takabe, R.
name: Suemasu, T.
name: Usami, N.
Publisher: name: WIP
Year: 2016
Subjects: New Materials and Concepts for Solar Cells and Modules
New Materials and Concepts for Cells

description: 32nd European Photovoltaic Solar Energy Conference and Exhibition; 76-79
description: We have succeeded in observation of photoresponsivity of BaSi2 film grown on Si by
vacuum evaporation method, raising its promising application in high efficiency thin film solar cell.
Photocurrent was observed at photon energies larger than 1.28 eV, which corresponds to band gap of
evaporated BaSi2 film. The effect of deposited substrate temperature on photoresponsivity was also
investigated. The obtained results indicate that BaSi2 film grown at substrate temperature of 500 oC, which
is single phase and free from crack, shows the best photoresponsivity. Maximum value of photocurrent was
obtained at photon energy of 1.9 eV, corresponding to an external quantum efficiency of 22% under reverse
applied voltage of 2 V.