cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Fabrication and Characterization of Multilayered SiC Nano-Particles for Tandem Solar Cells
Creators: name: Lee, D.U.
name: Lee, T.H.
name: Kim, E.-K.
name: Han, I.K.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Advanced Photovoltaics
New Types of Cells and Modules

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 633-635
description: We fabricated the multilayered SiC nano-particles embedded in a SiO2 dielectric layer which were formed and isolated by post-annealing process at 900 oC for 3 min. The morphology of SiC nano-particles was measured by field-emission transmission electron microscopy, and then they have a spherical shape with an average diameter of 7 ~ 20 nm. Also, the optical properties were also studied by photoluminescence (PL) and fourier transform infrared spectroscopy (FTIR) measurements. The PL spectra of multilayered SiC nano-particles embedded in the SiO2 dielectric layer shows a broad single peak at 504.8 nm (2.46 eV) in ranged from 300 to 800 nm.
Structures in multiple spin-2 interactions
Creators: name: Baldacchino, Oliver
name: Schmidt-May, Angnis
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study generalisations of ghost-free bimetric theory which involve more than two spin-2 fields. The consistent interactions can enter in the form of two different couplings and in the majority of this work we concentrate on the simpler one. The corresponding action involves one metric coupled to $N$ tensor fields which do not interact with each other. We derive maximally symmetric solutions to the multimetric equations of motion and identify the mass eigenstates in the linearised theory around these backgrounds. Our results are then applied to the problem of singling out multimetric models which possess certain additional structures. In particular, we look for a relation between scale invariant background solutions, the perturbative emergence of Weyl invariance and the presence of partially massless spin-2 fields in the linear theory. Our findings generalise known results in bimetric theory and allow us to point out similarities and differences between the bi- and multimetric models.
description: 40 pages, 4 figures; typos in eq. (3.24) and (3.37) fixed
Determining Variability in Arctic Sea Ice Pressure Ridge Topography With ICESat-2
Creators: name: Duncan, K.
name: Farrell, S. L.
Publisher: name: Wiley
Year: 2022
Subjects: sea ice
remote sensing
Arctic region
dynamics
properties

description: We investigate the characteristics and distribution of pressure ridges in Arctic sea ice using a novel algorithm applied to ICESat-2 surface heights. We derive the frequency and height of individual pressure ridges and map surface roughness and ridging intensity at the basin scale over three winters between 2019 and 2021. Comparisons with near-coincident airborne lidar data show that not only can we detect individual ridges 5.6 m wide, but also measure sail height more accurately than the existing ICESat-2 sea ice height product. We find large regional variability in ridge morphology not only related to parent ice type but also geographic location. Ridge sails are best represented by log-normal distributions while surface roughness is well fit by an exponential normal function. Our results reveal that high-resolution satellite altimetry is valuable for characterizing sea ice deformation at short length-scales and delivers observations that will advance ridging parameterizations in sea ice models.
GaAs Multi Junction Cells for Medium and High Concentration Photovoltaics
Creators: name: Campesato, R.
name: Casale, M.C.
name: Gabetta, G.
name: Gori, G.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Advanced Photovoltaics
Terrestrial Concentrator Systems

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 811-815
description: The purpose of this work is to describe the state of the art of the development and production of single and multi-junction solar cells, based on III-V compounds, manufactured in Italy, for Photovoltaic systems working at medium and high concentration. The GaAs based solar cells are derived from space devices and optimised for the terrestrial application. In view of the cost of the materials, only concentration systems can be a valuable option. Two kinds of concentrators are considered: low/medium factors (50-300x), high factors (>500 x). The systems designed for Low/Medium concentration factors can use solar cells directly mutuated from the space production (for example, the edges of round wafers can be used to manufacture small solar cells). At high concentration, specifically developed multi junction solar cells have to be used. In particular, the tunnel diode peak current is critical at high concentration. A model was developed to calculate it and optimise the tunnel diode structure. A comparison between theoretical and experimental results shows the relevance of annealing degradation on tunnel diode performances.
HYPERgeometric functions DIfferential REduction: Mathematica-based packages for the differential reduction of generalizedhypergeometric functions: Fc hypergeometric function of three variables
Creators: name: Bytev, V.
name: Kniehl, B.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mathematical Physics (math-ph)
subject: Symbolic Computation (cs.SC)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We present a further extension of the HYPERDIRE project, which is devoted to the creation of a set of Mathematica-based program packages for manipulations with Horn-type hypergeometric functions on the basis of differential equations. Specifically, we present the implementation of the differential reduction for the Lauricella function $F_C$ of three variables.
description: 15 pages, minor changes, accepted for publication in Computer Physics Communications
Weak (anti)localization in tubular semiconductor nanowires with spin-orbit coupling
Creators: name: Kammermeier, Michael
name: Wenk, Paul
name: Schliemann, John
name: Heedt, Sebastian
name: Schäpers, Thomas
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We compute analytically the weak (anti)localization correction to the Drude conductivity for electrons in tubular semiconductor systems of zinc blende type. We include linear Rashba and Dresselhaus spin-orbit coupling (SOC) and compare wires of standard growth directions $\langle100\rangle$, $\langle111\rangle$, and $\langle110\rangle$. The motion on the quasi-two-dimensional surface is considered diffusive in both directions: transversal as well as along the cylinder axis. It is shown that Dresselhaus and Rashba SOC similarly affect the spin relaxation rates. For the $\langle110\rangle$ growth direction, the long-lived spin states are of helical nature. We detect a crossover from weak localization to weak anti-localization depending on spin-orbit coupling strength as well as dephasing and scattering rate. The theory is fitted to experimental data of an undoped $\langle111\rangle$ InAs nanowire device which exhibits a top-gate-controlled crossover from positive to negative magnetoconductivity. Thereby, we extract transport parameters where we quantify the distinct types of SOC individually.
description: 17 pages, 9 figures
Enhanced Schiff and magnetic quadrupole moments in deformed nuclei and their connection to the search for axion dark matter
Creators: name: Dalton, F.
name: Flambaum, V. V.
name: Mansour, A. J.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: Nuclear Theory (nucl-th)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Deformed nuclei possess enhanced moments violating time reversal invariance ($T$) and parity ($P$). Collective magnetic quadrupole moments (MQM) appear in nuclei with a quadrupole deformation (which have ordinary $T$,$P$-conserving collective electric quadrupole moments). Nuclei with an octupole deformation have a collective electric octupole moment, electric dipole moment (EDM), Schiff moment and MQM in the intrinsic frame which rotates with the nucleus. In a state with definite angular momentum in the laboratory frame, these moments are forbidden by $T$ and $P$ conservation, meaning their expectation values vanish due to nuclear rotation. However, nuclei with an octupole deformation have doublets of close opposite parity rotational states with the same spin, which are mixed by $T$,$P$-violating nuclear forces. This mixing polarises the orientation of the nuclear axis along the nuclear spin, and all moments existing in the intrinsic frame appear in the laboratory frame (provided the nuclear spin $I$ is sufficiently large to allow such a moment). Such a mechanism produces enhanced $T$,$P$-violating nuclear moments. This enhancement also takes place in nuclei with a soft octupole vibration mode. In this paper we present updated estimates for the enhanced Schiff moment in isotopes of Eu, Sm, Gd, Dy, Er, Fr, Rn, Ac, Ra, Th, Pa, U, Np and Pu in terms of the CP-violating $π$-meson--nucleon interaction constants $\bar{g}_{0},\bar{g}_{1}$ and $\bar{g}_{2}$, the QCD parameter $\barθ$ and the quark chromo-EDMs. The implications of the enhanced $T$,$P$-violating moments to the search for axion dark matter in solid state experiments are also discussed, with potential alternative candidate compounds in which we may expect enhanced effects suggested.
Development of Photovoltaics (2007) in the European Union New Member States
Creators: name: Pietruszko, S.M.
Publisher: name: WIP-Munich
Year: 2008
Subjects: PV Deployment
PV Markets

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 3726-3729
description: This paper presents an overview of the status of photovoltaics in 12 European Union New Member States in 2007. In this year a significant progress in PV development has taken place, what is seen in the total installed PV power growth by 180%. This was mostly due to the rapid development of large scale PV installations in the Czech Republic and new investments in few other countries. The countries which have been most successful are those which have adopted an integrated package of market stimulation and promotion measures (Czech Republic, Slovenia, and Cyprus). High and long lasting FiT rate encourages PV investing in those countries. Growth of PV manufacturing plants starting production in NMS has also been observed.
What does the Bullet Cluster tell us about self-interacting dark matter?
Creators: name: Robertson, Andrew
name: Massey, Richard
name: Eke, Vincent
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We perform numerical simulations of the merging galaxy cluster 1E 0657-56 (the Bullet Cluster), including the effects of elastic dark matter scattering. In a similar manner to the stripping of gas by ram pressure, dark matter self-interactions would transfer momentum between the two galaxy cluster dark matter haloes, causing them to lag behind the collisionless galaxies. The absence of an observed separation between the dark matter and stellar components in the Bullet Cluster has been used to place upper limits on the cross-section for dark matter scattering. We emphasise the importance of analysing simulations in an observationally-motivated manner, finding that the way in which the positions of the various components are measured can have a larger impact on derived constraints on dark matter's self-interaction cross-section than reasonable changes to the initial conditions for the merger. In particular, we find that the methods used in previous studies to place some of the tightest constraints on this cross-section do not reflect what is done observationally, and overstate the Bullet Cluster's ability to constrain the particle properties of dark matter. We introduce the first simulations of the Bullet Cluster including both self-interacting dark matter and gas. We find that as the gas is stripped it introduces radially-dependent asymmetries into the stellar and dark matter distributions. As the techniques used to determine the positions of the dark matter and galaxies are sensitive to different radial scales, these asymmetries can lead to erroneously measured offsets between dark matter and galaxies even when they are spatially coincident.
description: 21 pages, 16 figures, v2 matches accepted MNRAS version
Multicenter evaluation of the hemolysis index in automated clinical chemistry systems
Creators: name: Lippi, Giuseppe
name: Salvagno, Gian Luca
name: Blanckaert, Norbert
name: Giavarina, Davide
name: Green, Sol
name: Kitchen, Steve
name: Palicka, Vladimir
name: Vassault, Anne J.
name: Plebani, Mario
Publisher: name: Kooperation de Gruyter
Year: 2009

description: Background: In vitro hemolysis, the prevailing cause of preanalytical error in routine laboratory diagnostics, might influence the reliability of several tests, affect the quality of the total testing process and jeopardize patient safety. Although laboratory instrumentation is now routinely equipped with systems capable of automatically testing and eventually correcting for hemolysis interference, to our knowledge there are no reports that have compared the efficiency of different analytical platforms for identifying and classifying specimens with hemolysis. Methods: Serum from a healthy volunteer was spiked with varying amounts of hemolyzed blood from the same volunteer, providing a serum free hemoglobin concentration ranging from 0.0 g/L to 2.0 g/L as measured by the reference cyanmethemoglobin assay. The spiked serum samples were shipped to seven separate laboratories and the hemolysis index (HI) was tested in triplicate on the following analytical platforms: Roche Modular System P (n=4) and Integra 400 Plus (n=1), Siemens Dimension RxL (n=3), ADVIA 2400 (n=1) and ADVIA 1800 (n=1), Olympus AU 680 (n=1) and Coulter DXC 800 (n=1). Results: Satisfactory agreement of HI results was observed among the various analytical platforms, despite a trend toward overestimation by the ADVIA 2400 and 1800. After normalizing results according to the instrument-specific alert value, discrepancies were considerably reduced. All instruments except for the Dimension RxL gave values normalized to the instrument-specific alert value, <1.0 for the sample with 0.048 g/L free hemoglobin, and >1.0 for the sample with 0.075 g/L free hemoglobin. The results of the four Modular System P tests were also highly reproducible among the different facilities. When evaluating instruments that provided quantitative HI results, the mean intra-assay coefficient of variation (CV) calculated for the triplicate determinations was always between 0.1% and 2.7%. Conclusions: The results of this multicenter evaluation confirm that efficiency of different analytical platforms to correctly identify and classify unsuitable samples is satisfactory. However, more effort should be placed on the standardization of reporting HI. All the instruments that we tested provide either quantitative or qualitative results that are essentially comparable, but which should always be compared with the instrument-specific alert values to harmonize their efficiency. Clin Chem Lab Med 2009;47:934–9.
The Double Legacy of Bernalism in Science Diplomacy
Creators: name: Ienna, Gerardo
Publisher: name: Wiley
Year: 2022
Subjects: history of science from below
Bernalism
science diplomacy
political epistemology
World Federation of Scientific Workers
World Peace Council
UNESCO

description: Recent debates in the history of science aimed at reconstructing the history of scientific diplomacy have privileged the analysis of forms of diplomacy coming from above. Instead, the objective of this paper is to raise awareness of these debates by looking at attempts at scientific diplomacy from below. Such a shift in perspective might allow us to observe the impact of marginalized social agents on the construction of international diplomatic choices. This article particularly focuses attention on how the legacy of Bernalism has fostered the emergence of two different types of science diplomacy. On the one hand, Bernalism has influenced the goals of organizations such as UNESCO and the World Peace Council, which are forms of science diplomacy I would term from above. On the other hand, Bernalism has also been at the origin of radical scientific movements that I propose to interpret as forms of scientific diplomacy from below. These have, in fact, played a cardinal role not only in raising public awareness of the social and political roles of science, but also in the more direct participation of scientists in defining the political objectives of their research activity. From this point of view, I analyze how an association like the World Federation of Scientific Workers proposed (at least in the beginning) greater democratic participation than the top-down structures of other forms of scientific internationalism.
Deposition of High Permeation Barrier Films by Plasma-Enhanced Chemical Vapor Deposition for Organic Solar Cells
Creators: name: Ubrig, J.
name: Bedjaoui, M.
name: Martin, S.
name: Cros, S.
name: Bouree, J.-E.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Advanced Photovoltaics
New Types of Cells and Modules

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 712-715
description: SiOxCy monolayers or stacked multilayers have been deposited at low temperature using a low frequency (100 kHz) plasma-enhanced chemical vapor deposition reactor associated or not with a plasma treatment. An innovative test based on transformation of lithium with oxygen and water vapor has been used to assess the permeation barrier properties of the films. Effects on the permeability of barrier thickness, of a specific argon plasma treatment during the growth process and of the number of grown interfaces are successively studied. A physical explanation of the effect of the plasma treatment is proposed.
Non-Hermitian Floquet-Free Analytically Solvable Time Dependant Systems
Creators: name: Ghaemi-Dizicheh, Hamed
name: Ramezani, Hamidreza
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The non-Hermitian models, which are symmetric under parity (P) and time-reversal (T) operators, are the cornerstone for the fabrication of new ultra-sensitive optoelectronic devices. However, providing the gain in such systems usually demands precise contorol of nonlinear processes, limiting their application. In this paper, to bypass this obstacle, we introduce a class of time-dependent non-Hermitian Hamiltonians (not necessarily Floquet) that can describe a two-level system with temporally modulated on-site potential and couplings. We show that implementing an appropriate non-Unitary gauge transformation converts the original system to an effective one with a balanced gain and loss. This will allow us to derive the evolution of states analytically. Our proposed class of Hamiltonians can be employed in different platforms such as electronic circuits, acoustics, and photonics to design structures with hidden PT-symmetry potentially without imaginary onsite amplification and absorption mechanism to obtain an exceptional point.
description: 8 pages, 4 figures
Conducting Transparent Polymer in Solar Cell: Stability Test
Creators: name: Chebotareva, A.
name: Untila, G.
name: Kost, T.
name: Lachinov, A.
name: Kornilov, V.
name: Salazkin, S.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Advanced Photovoltaics
New Types of Cells and Modules

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 726-729
description: Transparent conducting polymer film, based on polydifenylenephthalide, is used to attach current collecting grid of wire to silicon solar cell surface covered by antireflecting TCO layer in Laminated Grid Solar Cell (LGCell) construction. PS07 polymer composition was developed to form polymer films with higher transmission in the short wavelength region. Applying of PS07 transparent conducting polymer in LGCell contact system leaded to the increase of spectral response and efficiency of LGCell in comparison with the other tested polymer compositions. The goal of our work was to test the stability of electrical and optical properties of the structure Si/TCO/polymer PS07/metal and, correspondingly, the stability of conversion parameters of LGCell with polymer PS07 to the external action of irradiation, electric current, temperatures and humidity. Test structures Si-substrate/TCO film /PS07 film/metal after thermocycling showed 3 fold increase of contact resistance. The contact resistance of test structures demonstrated stability for electric current densities up to 50 A/cm2. LGCells with PS07 film were exposed to xenon lamp irradiation 1W/cm2 (10-Suns) and thermocycling. The spectral response and light I-V curves were measured before and after testing. Concurrently the control of polymer film transmittance was made on test structures Glass/PS07/Glass, which revealed the reduction of transmittance in the short wavelength region after irradiation. The stability tests showed slight degradation of LGCell conversion parameters due to the deterioration of electric contact in the system TCO/polymer PS07/metal and yellowing of PS07 film during external actions.
Thin Film Concepts for Photon Addition Materials
Creators: name: Ivanova, S.
name: Pellé, F.
name: Esteban, R.
name: Laroche, M.
name: Greffet, J.J.
name: Collin, S.
name: Pelouard, J.L.
name: Guillemoles, J.F.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Advanced Photovoltaics
New Types of Cells and Modules

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 734-736
description: Even in the best state of the art solar cells, a large fraction of the solar energy is left untouched: that of sub-bandgap radiation. It is the aim of the present work to tap this resource by using photon addition (also called upconversion
in the literature). In a photon addition type system, a large gap PV cell absorbs the high-energy photons of the solar spectrum whereas the IR photons are converted into higher energy photons and returned to the cell, e.g. using a simple mirror [1,2]. In principle, for an optimized solar cell, the gain can be quite large (up to 63% conversion efficiency under maximal concentration of 6000K black body radiation [3]). This process can be demonstrated using low phonon energy solid state materials (e.g., crystals, glasses or glassceramics) doped with rare earth ions [1,2]: the latter absorb part of the infra red radiation and convert it via internal energy transfer and luminescence in higher energy photons. Fluoride based crystals and vitroceramics, doped with Er and Yb, demonstrating efficient IR to VIS conversion, have been synthesized, and their conversion efficiency has been measured. Efficiencies (i.e., ratio of emitted visible light energy to absorbed IR energy) up to 5% have been obtained. In spite of the fact that the up-conversion processes in rare earth doped materials are extensively studied up to now, there exist a very few publications reporting on the efficiency
measurements. Due to the inherent nonlinearity of up-conversion process, such measurements become a rather sophisticated procedure. Characterization of synthesized materials will be presented along with their conversion efficiency measurement. The setup and method will be presented in details. The studied materials demonstrate upconversion efficiencies among the highest published so far. Issue, on which progress has been made in this work, concerns the relatively low absorption coefficient of the lanthanides, which lead to rather low overall efficiency. We show by simulation that, by using special resonant structures, absorptivity of lanthanide doped material could be considerably enhanced to the point that the fabrication of thin film (sub-micrometer) up-converters can be considered.
Untersuchung des zerebralen Stoffwechsels bei Patienten nach zerebralen Läsionen, insbesondere nach einer aneurysmatischen Subarachnoidalblutung, mittels bettseitiger Mikrodialyse
Creators: name: Sarrafzadeh-Khorassani, Asita S.
Publisher: name: Humboldt-Universität zu Berlin, Medizinische Fakultät - Universitätsklinikum Charité
Year: 2004
Subjects: subject: Ischämie
subject: Mikrodialyse
subject: Hirnstoffwechsel
subject: Oxygenierung
subject: Ischemia
subject: Hypoxia
subject: Microdialysis
subject: Cerebral metabolism
subject: 610 Medizin
subject: 33 Medizin
subject: YG 5100

description: Patienten mit zerebralen Läsionen, wie der aneurysmatischen Subarachnoidalblutung (SAB) und dem schweren Schädel-Hirn-Trauma (SHT), haben ein hohes Risiko für sekundäre Schädigungen des Gehirns aufgrund einer Minderdurchblutung (Ischämie) und einem Sauerstoffmangel (Hypoxie). Bei der SAB ist heutzutage die verlaufsbestimmende Komplikation das Auftreten einer Vasospasmus- assoziierten Ischämie, d.h. einer Minderdurchblutung aufgrund einer Gefäßverengung, die mit einer hohen Langzeitmorbidität mit schweren neurologischen Defiziten und einer hohen Mortalität assoziiert ist. Seit Beginn der 90er Jahre wird bei SAB- und SHT- Patienten das Mikrodialyseverfahren zur Messung des zerebralen Stoffwechsels eingesetzt und steht als Methode auf der Intensivstation seit 1997 zu Verfügung. Hierbei werden mittels einem, in das gefährdete Hirngewebe inserierten Katheter die extrazellulären Konzentrationen verschiedener Parameter gemessen. Patienten mit SAB weisen in Phasen einer klinischen Verschlechterung (z.B. Auftreten einer Lähmung) charakteristische Veränderungen des Hirnstoffwechsels auf. Vergleichsmessungen mit der Positronenemissionstomographie zeigen als mögliche Ursache für einen gestörten Hirnstoffwechsel einen erniedrigten zerebralen Blutfluß. Auch bei einer drohenden Hypoxie (Hirngewebe-PO2 < 10 mmHg) sind bereits metabolische Veränderungen zu beobachten. Die frühzeitige Erkennung und - wenn möglich - Behandlung einer Ischämie / Hypoxie könnte die Prognose von Patienten nach SAB und SHT wesentlich verbessern.
description: Patients with cerebral lesions run a high risk of developing cerebral hypoxic and ischemic damage due to secondary insults. To minimize the risk of secondary cerebral hypoxia and ischemia, new monitoring techniques of cerebral oxygenation and metabolism have been developed and may help to understand the pathophysiology of secondary brain damage for a better treatment and outcome in critical patients. Cerebral microdialysis is a relatively new technique for measuring brain molecules of the extracellular space. The technical aspects, the interpretation of the commonly measured parameters, the use of the commonly used oxygenation parameters (monitoring of brain tissue PO2 and the microdialysis technique to monitor cerebral metabolism) in patients with head injury and subarachnoid hemorrhage are considered. Pitfalls of the techniques and their future potential are discussed.
The Design of a Sustainable National Grid-Connected PV Programme in Malaysia and First PV Success Stories
Creators: name: Mak, G.
name: Haris, A.H.
name: Tan, V.
name: Lalchand, G.
name: Ruoss, D.
name: Chen, W.N.
Publisher: name: WIP-Munich
Year: 2008
Subjects: PV Deployment
PV Markets

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 3730-3734
description: Since 2003, the United Nations Development Programme (UNDP) and the Global Environment Facility (GEF) have been working together with the Government of Malaysia to develop and implement a national programme on grid-connected photovoltaic in buildings (BIPV). The project is designed with a dynamic approach to ensure that lessons learned from success stories in other countries in PV programmes be used as a reference and be modified to suit local requirements. This paper will present and highlight the success stories and experience of the Malaysia Building Integrated Photovoltaic (MBIPV) Project in Malaysia through its showcase projects and SURIA 1000 programme to date. The project applies a unique approach focusing on developing the market for BIPV technology application and capacity building. The national BIPV programme started from almost zero experience (status in 2003: 450 kWp grid-connected PV installed capacity), and provided a unique opportunity to develop the implementation initiatives for a sustainable programme based on international experiences and lessons learned that could be locally sustained and easily replicated elsewhere.
Splines are Universal Solutions of Linear Inverse Problems with Generalized-TV regularization
Creators: name: Unser, Michael
name: Fageot, Julien
name: Ward, John Paul
Publisher: name: arXiv
Year: 2016
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 41A15, 47A52, 94A20, 46E27, 46N20, 47F05, 34A08, 26A33

description: Splines come in a variety of flavors that can be characterized in terms of some differential operator L. The simplest piecewise-constant model corresponds to the derivative operator. Likewise, one can extend the traditional notion of total variation by considering more general operators than the derivative. This leads us to the definition of the generalized Beppo-Levi space M, which is further identified as the direct sum of two Banach spaces. We then prove that the minimization of the generalized total variation (gTV) over M, subject to some arbitrary (convex) consistency constraints on the linear measurements of the signal, admits nonuniform L-spline solutions with fewer knots than the number of measurements. This shows that non-uniform splines are universal solutions of continuous-domain linear inverse problems with LASSO, L1, or TV-like regularization constraints. Remarkably, the spline-type is fully determined by the choice of L and does not depend on the actual nature of the measurements.
description: 28 pages, 1 figure
Low Temperature PECVD In-Situ Growth of Silicon Quantum Dots in Silicon Nitride for Third Generation Photovoltaics
Creators: name: Mercaldo, L.V.
name: Delli Veneri, P.
name: Esposito, E.M.
name: Usatii, I.
name: Privato, C.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Advanced Photovoltaics
New Types of Cells and Modules

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 629-632
description: Silicon nanostructures have interesting possible applications in third generation photovoltaics. The fabrication techniques of Si quantum dots in dielectric matrix usually involve high-temperature post-deposition treatments. Here we report on spontaneous growth of homogeneously-distributed silicon quantum dots in silicon nitride films by plasma enhanced chemical vapour deposition (PECVD) using two different gas mixtures: silane and nitrogen in one case and silane and ammonia diluted in nitrogen in the other. A low deposition temperature has been selected (≤300°C). This approach is particularly promising, since it allows for use of low cost substrates and in principle makes the use of such nano-engineered materials feasible within the classical thin film silicon solar cell architecture. Tuning of photoluminescence (PL) emission in the visible range is shown by varying nitrogen or ammonia flow rate. As an effect of the extra hydrogen available through the dissociation of NH3, much stronger PL is observed on samples grown with ammonia. The evolution of the photoluminescence emission with nitrogen or ammonia flow rate has been correlated to size change of Si dots spontaneously formed in the silicon nitride matrix. Amorphous nature for the Si aggregates can be inferred through Raman analysis in both cases. Optical absorption and spectroscopic ellipsometry measurements have also been carried out. In particular, the effect of the strongly absorbing Si nanostructures in the silicon nitride matrix on the absorption properties has been investigated.
Auriparus flaviceps subsp. sinaloae Phillips
Creators: name: Pachycephalidae
name: Aegithalidae
name: Remizidae
name: Paridae
name: Sittidae
name: Neosittidae
name: Certhiidae
name: Rhabdornithidae
name: Climacteridae
name: Dicaeidae
name: Pardalotidae
name: Nectariniidae, And
name: Lecroy, Mary
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Aves
Passeriformes
Remizidae
Auriparus

description: Auriparus flaviceps sinaloae Phillips Auriparus flaviceps sinaloae Phillips, 1986: 99 (SE end of Ensenada del Pabellón, SW Culiacán, Sinaloa, ca. 24 ° 20 9 N, 107 ° 30 9 W). Now Auriparus flaviceps sinaloae Phillips, 1986. See Webster, 1999: 3, and Madge, 2008: 74. HOLOTYPE: AMNH 831489, adult male, collected at Club Pichigüila, southeastern end of Laguna Chiricahueto, 5 southeastern end of Bahía 5 Ensenada del Pabellón, ca. 24.20N, 107.30W, S-W Sinaloa, Mexico, on 18 December 1985, by Allan Phillips (no. 11458). From the collection of Allan R. Phillips. COMMENTS: See Dickerman and Parkes (1997) for a list of Phillips types and their current whereabouts. The holotype of sinaloae, from the estate of A.R. Phillips, was deposited in AMNH in May 1996. It bears a Phillips Collection label marked ‘‘Type’’ and a red Phillips type label in addition to an AMNH type label. Phillips’ original number is 11458, not 11485 as given in Dickerman and Parkes (1997: 224). Phillips gave no indication of how many specimens he examined.
description: Published as part of Pachycephalidae, Aegithalidae, Remizidae, Paridae, Sittidae, Neosittidae, Certhiidae, Rhabdornithidae, Climacteridae, Dicaeidae, Pardalotidae, Nectariniidae, And & Lecroy, Mary, 2010, Type Specimens Of Birds In The American Museum Of Natural History Part 8. Passeriformes:, pp. 1-178 in Bulletin of the American Museum of Natural History 2010 (333) on page 65
description: {"references": ["Phillips, A. R. 1986. The known birds of North and Middle America. Part 1. Denver, CO: privately printed, 259 pp.", "Webster, M. D. 1999. Verdin Auriparus flaviceps. In A. Poole and F. Gill (editors), The birds of North America: No. 470. Philadelphia: The Birds of North America, Inc.", "Madge, S. C. 2008. Family Remizidae (pendulinetits). In J. del Hoyo, A. Elliott, and D. Christis (editors), Handbook of birds of the world, volume 13: 52 - 75. Barcelona: Lynx Edicions, 880 pp., 60 pls., 536 photographs.", "Dickerman, R. W., and K. C. Parkes. 1997. Taxa described by Allan R. Phillips, 1939 - 1944: a critical list. In R. W. Dickerman (Compiler), The era of Allan R. Phillips: a festschrift: 211 - 234. Albuquerque, NM: Horizon Communications, 246 pp."]}
Cutting sequences on square-tiled surfaces
Creators: name: Johnson, Charles C.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Dynamical Systems (math.DS)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 37E35

description: We characterize cutting sequences of infinite geodesics on square-tiled surfaces by considering interval exchanges on specially chosen intervals on the surface. These interval exchanges can be thought of as skew products over a rotation, and we convert cutting sequences to symbolic trajectories of these interval exchanges to show that special types of combinatorial lifts of Sturmian sequences completely describe all cutting sequences on a square-tiled surface. Our results extend the list of families of surfaces where cutting sequences are understood to a dense subset of the moduli space of all translation surfaces.
description: 28 pages, 12 figures. Minor revisions and corrections. To appear in Geometriae Dedicata
Pliability, or the whitney extension theorem for curves in carnot groups
Creators: name: Juillet, Nicolas
name: Sigalotti, Mario
Publisher: name: arXiv
Year: 2016
Subjects: subject: Metric Geometry (math.MG)
subject: Group Theory (math.GR)
subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: The Whitney extension theorem is a classical result in analysis giving a necessary and sufficient condition for a function defined on a closed set to be extendable to the whole space with a given class of regularity. It has been adapted to several settings, among which the one of Carnot groups. However, the target space has generally been assumed to be equal to R^d for some d $\ge$ 1. We focus here on the extendability problem for general ordered pairs (G\_1,G\_2) (with G\_2 non-Abelian). We analyze in particular the case G\_1 = R and characterize the groups G\_2 for which the Whitney extension property holds, in terms of a newly introduced notion that we call pliability. Pliability happens to be related to rigidity as defined by Bryant an Hsu. We exploit this relation in order to provide examples of non-pliable Carnot groups, that is, Carnot groups so that the Whitney extension property does not hold. We use geometric control theory results on the accessibility of control affine systems in order to test the pliability of a Carnot group. In particular, we recover some recent results by Le Donne, Speight and Zimmermann about Lusin approximation in Carnot groups of step 2 and Whitney extension in Heisenberg groups. We extend such results to all pliable Carnot groups, and we show that the latter may be of arbitrarily large step.
Nordic Centre of Excellence in Photovoltaics (NCOE in PV)
Creators: name: Holt, A.
name: Edoff, M.
name: Lund, P.
name: Lauritzen, H.
name: Reenaas, T.W.
name: Mellikov, E.
name: Lantratov, V.
Publisher: name: WIP-Munich
Year: 2008
Subjects: PV Deployment
PV Markets

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 3753-3757
description: A NCoE in PV has been formed by seven research institutions in the Nordic region. The centre is funded by Nordic Energy Research, Renewable Energy Corporation ASA, Elkem Solar AS, Solibro Research AB, Topsil A/S,
Energinet.dk, and Luvata as well as the participating research organisations. The main objective is to strengthen the already formed Nordic R&D network and to serve the fast-growing and demanding Nordic PV industry. This will be achieved by educating PhD students with compulsory mobility of the students, arranging general workshops within solar cell research, organizing in-depth workshops on selected topics, giving hands-on workshops on processing of solar cells, and actively disseminate results both in public and scientific media channels.
Granular superconductivity and magnetic-field-driven recovery of macroscopic coherence in a cuprate/manganite multilayer
Creators: name: Mallett, B. P. P.
name: Khmaladze, J.
name: Marsik, P.
name: Perret, E.
name: Cerreta, A.
name: Orlita, M.
name: Biškup, N.
name: Varela, M.
name: Bernhard, C.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We show that in Pr$ _{0.5} $La$ _{0.2} $Ca$ _{0.3} $MnO$ _{3} $/YBa$ _{2} $Cu$ _{3} $O$ _{7} $ (PLCMO/YBCO) multilayers the low temperature state of YBCO is very resistive and resembles the one of a granular superconductor or a frustrated Josephson-junction network. Notably, a coherent superconducting response can be restored with a large magnetic field which also suppresses the charge-orbital order in PLCMO. This coincidence suggests that the granular superconducting state of YBCO is induced by the charge-orbital order of PLCMO. The coupling mechanism and the nature of the induced inhomogeneous state in YBCO remain to be understood.
description: 6 pages, 4 figures. Supplementary Information as extra file
Multistage PV Conversion on a Nanostructured Silicon Metamaterial
Creators: name: Kuznicki, Z.T.
name: Meyrueis, P.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Advanced Photovoltaics
New Types of Cells and Modules

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 720-725
description: To improve PV conversion efficiency we have suggested the nanostructurization of a PV material into nanolayers with active interfaces. In this way, a sequence of two conversion mechanisms is possible using a Si
transformation up to a metamaterial buried within a single-crystal wafer. The Si metamaterial is conditioned by different fields: mechanical and electrical, as well as that of structural defects. It turns out that the fields and their
interactions are strong enough to transform significantly the original material behavior without changing its chemical composition. We have shown recently [1] that 400 nm photons can be converted by a superficial nanolayer into
collectable primary and secondary free-carriers leading to an internal quantum efficiency higher than 135%. This performance is inversely proportional to the incident light intensity. Here we present three experimental demonstrations of multiplication steps by secondary generation using both weak and near sun intensity excitations. The step-like collection efficiency with the specific energy E = 0.274 eV appears in specially conceived amorphized structures without passivation.
Thermal Percolation of Antiperovskite Superionic Conductor into Porous MXene Scaffold for High-Capacity and Stable Lithium Metal Battery
Creators: name: Li, Yang
name: Kong, Long
name: Yang, Haochen
name: Li, Shuai
name: Deng, Zhi
name: Li, Shuo
name: Wang, Liping
name: Lee, Jim Yang
name: Zhao, Yusheng
name: Chen, Po-Yen
Publisher: name: Wiley
Year: 2022
Subjects: TiC2T x MXene scaffolds
Li2OHCl antiperovskite superionic conductors
lithium metal anodes
percolative electron/ion frameworks

description: Lithium metal battery is considered an emerging energy storage technology due to its high theoretical capacity and low electrochemical potential. However, the practical exploitations of lithium metal batteries are not realized because of uncontrollable lithium deposition and severe dendrite formation. Herein, a thermal percolation strategy is developed to fabricate a dual-conductive framework using electronically conductive Ti3C2Tx MXene aerogels (MXAs) and Li2OHCl antiperovskite superionic conductor. By melting Li2OHCl at a low temperature, the molten antiperovskite phase can penetrate the MXA scaffold, resulting in percolative electron/ion pathways. Through density functional theory calculations and electrochemical characterizations, the hybridized lithiophilic (MXA)−lithiophobic (antiperovskite) interfaces can spatially guide the deposition of lithium metals and suppress the growth of lithium dendrites. The symmetric cell with MXA–antiperovskite electrodes exhibits superior cycling stability at high areal capacities of 4 mAh cm−2 over 1000 h. Moreover, the full cell with MXA−antiperovskite anode and high-loading LiFePO4 cathode demonstrates high energy and power densities (415.7 Wh kgcell−1 and 231.0 W kgcell−1) with ultralong lifespans. The thermal percolation of lithium superionic conductor into electronically conductive scaffolds promises an efficient strategy to fabricate dual-conductive electrodes, which benefits the development of dendrite-free lithium metal anodes with high energy/power densities.
Zinc Phthalocyanine (ZNPC) Incorporated Into Silicon Matrix Grown by Plasma Enhanced Chemical Vapor Deposition (PECVD)
Creators: name: Zeng, X.B.
name: Zhang, C.S.
name: Liu, F.Z.
name: Shi, M.J.
name: Peng, W.B.
name: Liu, S.Y.
name: Xiao, H.B.
name: Liao, X.B.
name: Kong, G.
name: Wang, Z.G.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Advanced Photovoltaics
New Types of Cells and Modules

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 737-739
description: Inorganic semiconductors silicon (Si) –organic dye zinc phthalocyanines (ZnPc) composites is a promising candidate for solar-cell application, because it combines the desired properties of both the organic and inorganic components. In this paper we have reported the optoelectronic properties of ZnPc–Si thin film. The composite layers were prepared by vacuum evaporation of ZnPc and sequential deposition amorphous silicon via Plasma Enhanced Chemical Vapor Deposition (PECVD) on the as-deposited ZnPc film. The ZnPc–Si compound functional materials have been investigated using absorption and photocurrent method. We found that ZnPc incorporated into Silicon matrix films results in the increase of the absorption between 550~800 nm and decease in defect of states(DOS), which contributed to the observed enhancement in photoconductivity of the composites film.
Spin Ferroquadrupolar Order in the Nematic Phase of FeSe
Creators: name: Wang, Zhentao
name: Hu, Wen-Jun
name: Nevidomskyy, Andriy H.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We provide evidence that spin ferroquadrupolar (FQ) order is the likely ground state in the nonmagnetic nematic phase of stoichiometric FeSe. By studying the variational mean-field phase diagram of a bilinear-biquadratic Heisenberg model up to the 2nd nearest neighbor, we find the FQ phase in close proximity to the columnar antiferromagnet commonly realized in iron-based superconductors; the stability of FQ phase is further verified by the density matrix renormalization group. The dynamical spin structure factor in the FQ state is calculated with flavor-wave theory, which yields a qualitatively consistent result with inelastic neutron scattering experiments on FeSe at both low and high energies. We verify that FQ can coexist with $C_4$ breaking environments in the mean-field calculation, and further discuss the possibility that quantum fluctuations in FQ act as a source of nematicity.
description: 8 pages, 7 figures, Erratum added
The Certification of Skills in the Field of Renewable Energy Sources (RES): The Case of Photovoltaic
Creators: name: Pistochini, P.
name: Moreno, A.
name: Castello, S.
name: Bonfiglio, L.
Publisher: name: WIP-Munich
Year: 2008
Subjects: PV Deployment
PV Markets

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 3671-3675
description: In recent years energy from RES is increasing considerably in many European countries as the result of incentive schemes. The risk is that a race for easy profits will annul the advantages of these technologies because of a dearth of appropriately qualified and experienced designers, installers, and inspectors who could assure the correct realization of RE projects.
To improve the overall quality of new PV installations, ENEA (the Italian Agency for New technologies, the Energy and the Environment) has defined, in accordance with interested parties, profiles for professionals to provide end
users with the necessary assurances that their requirements will be fulfilled.