cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Precision Ephemerides For Gravitational Wave Searches: II. Cyg X-2
Creators: name: Premachandra, Sammanani S.
name: Galloway, Duncan K.
name: Casares, Jorge
name: Steeghs, Danny T.
name: Marsh, Thomas R.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Accreting neutron stars in low-mass X-ray binaries (LMXBs) are candidate high-frequency persistent gravitational wave sources. These may be detectable with next generation interferometers such as Advanced LIGO/VIRGO within this decade. However, the search sensitivity is expected to be limited principally by the uncertainty in the binary system parameters. We combine new optical spectroscopy of Cyg X-2 obtained with the Liverpool Telescope (LT) with available historical radial velocity data, which gives us improved orbital parameter uncertainties based on a 44-year baseline. We obtained an improvement of a factor of 2.6 in the orbital period precision and a factor of 2 in the epoch of inferior conjunction T_0. The updated orbital parameters imply a mass function of 0.65 +/- 0.01 M_sun, leading to a primary mass (M_1) of 1.67 +/- 0.22 M_sun (for i=62.5 +/- 4 deg). In addition, we estimate the likely orbital parameter precision through to the expected Advanced LIGO and VIRGO detector observing period and quantify the corresponding improvement in sensitivity via the required number of templates.
description: 7 pages, 3 figures, accepted for publication by ApJ
An Overview of MWT Cells and Evolution to the ASPIRe Concept: A New Integrated mc-Si Cell and Module Design for High-Efficiencies
Creators: name: Romijn, I.
name: Mewe, A.A.
name: Lamers, M.W.P.E.
name: Kossen, E.
name: Bende, E.
name: Weeber, A.W.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Wafer-Based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Cells and Materials, Processing Technology of

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 1000-1005
description: At ECN, we are developing several different cell concepts to reduce the €/Wp costs of crystalline silicon solar cells by increasing the efficiency on thin and large solar cells. Our metallization wrap through (MWT) concept PUM reduces the shading losses from the front side by 3%, which results in a gain in Jsc. Furthermore, the cells are fully back contacted and easy to implement in a module. Another way to improve efficiencies, especially on thin wafers, is to replace the full aluminum BSF at the rear side by a more appropriate passivating layer like silicon nitride in combination with partial rear metallization. In this paper we present the development at ECN from standard H-patterned cell processing towards a combination of the two concepts mentioned above: our rear side passivated PUM cell, the ASPIRe cell. The proof of concept of the ASPIRe cell will be given. Compared to PUM reference cells, ASPIRe cells have reached higher Jsc and Voc, although the FF still remained behind. The highest efficiency obtained so far for ASPIRe cells is 16.4%, and methods to improve the FF by changing the rear side Al pattern are shown.
Development of Back Contact Si Solar Cell and Module in Pilot Production Line
Creators: name: Nakanura, K.
name: Kohira, M.
name: Abiko, Y.
name: Isaka, T.
name: Funakoshi, Y.
name: Machida, T.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Wafer-Based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Cells and Materials, Processing Technology of

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 1006-1009
description: We have been developing and improving the interdigitated back-contact (IBC) cell process using our pilot production line. We have achieved 20% efficiency in 126 mm quasi-square cell by means of screen printing method. The results of investigation about the cell thickness dependence show that we can reduce the cell thickness at least to 120 μm. Furthermore, we proposed surface-mount technology (SMT) concept as a candidate for new IBC module structure that is suitable for thinner IBC cells. We measured PV performance SMT single-cell modules, evaluated using the photographic surveying of EL and subjected to reliability tests. Finally, we fabricated some modules that consist of several IBC cells and demonstrated the effectiveness of the concept. In conclusion, we obtained the prospect to realize the high efficiency low cost IBC module.
No clear evidence of ferroelectric order in tensile-strained anatase-TiO2 thin films grown on (110) NdGaO3 substrates
Creators: name: Skiadopoulou, Stella
name: Kamba, Stanislav
name: Drahokoupil, Jan
name: Kroupa, Jan
name: Deepak, Nitin
name: Pemble, Martyn E.
name: Whatmore, Roger W.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Very recently there was a report of the discovery using piezoelectric force microscopy (PFM) of a switchable ferroelectric polarization in 1.6 % tensile strained TiO2 thin film with anatase crystal structure (see N. Deepak et al. Adv. Funct. Mater. 2014, 24, 2844). The polarization disappeared only above 450 K, which was assigned as a Curie temperature, Tc. Here we have performed X-ray diffraction, second-harmonic generation (SHG) and infrared investigations of the same films. Phonon frequencies exhibit less than a 10 % shift down with the tensile strain and no anomaly near expected TC. SHG experiment did not reveal any signal characteristic for inversion symmetry breaking, as expected in ferroelectric phase, and the c-lattice parameter exhibits no anomaly on heating near expected TC. Based on these results, we can summarize that we were not able to confirm the previously discovered ferroelectricity in tensile-strained anatase-TiO2 thin films.
description: 14 pages, 3 figures
Highly Efficient Light Splitting Photovoltaic Receiver
Creators: name: Groß, B.
name: Peharz, G.
name: Siefer, G.
name: Peters, M.
name: Goldschmidt, J.C.
name: Steiner, M.
name: Guter, W.
name: Klinger, V.
name: George, B.
name: Dimroth, F.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Advanced Photovoltaics
Terrestrial Concentrator Systems

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 130-134
description: This paper presents a spectral beam splitting arrangement providing the basis for a four-junction
photovoltaic receiver with virtually ideal band gap combination. A light trapping assembly in form of a 45°
parallelepiped applying two spectrally selective beam splitters and three solar cells realizes an approach to reach very
high solar-electrical conversion efficiency. The spectral beam splitters developed and used in this arrangement show
nearly ideal broadband characteristics to split the solar spectrum into three parts. The solar cell selection includes
III-V semiconductors and silicon. They were all fabricated at Fraunhofer ISE and assembled in the receiver setup.
The experimental setup demonstrated an outdoor efficiency of more than 34 %.
Spray-Coating as a Deposition Technique for Fully Solution Processed Polymer Solar Cells
Creators: name: Girotto, C.
name: Rand, B.P.
name: Steudel, S.
name: Hadipour, A.
name: Aernouts, T.
name: Genoe, J.
name: Heremans, P.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Advanced Photovoltaics
Organic-based PV

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 138-140
description: With an automated ultrasonic spray coater we deposit each of the layers of a P3HT:PCBM based
organic solar cell. We obtained smooth and uniform PEDOT:PSS layers for thicknesses of a few tens of nanometers,
yielding organic solar cells with the same performance as spin-coated devices. We demonstrate that a mixture of
P3HT and PCBM can also be deposited as the active layer of an organic solar cell and gives power conversion
efficiencies around 3%. We investigate also the deposition of the top contact from a Ag nanoparticle based solution,
which typically involves vacuum deposition of a metal or the application of a solution processed polymer conductor
with limited conductivity. After sintering the Ag nanoparticle film at 150°C, a temperature which is compatible with
processes on flexible substrates, cells show power conversion efficiencies above 3%. We spray-coated each of the
layers of an organic solar cell and obtained performances comparable to reference devices produced by spin coating
of the polymeric layers and vacuum evaporating of a top contact metal.
SI-Cells Radial Parquet for Parabolic Dish Receivers
Creators: name: Vivar, M.
name: Morilla, C.
name: Anton, I.
name: Sala, G.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Advanced Photovoltaics
Terrestrial Concentrator Systems

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 141-144
description: Concentration Photovoltaic (CPV) parabolic dishes uses to concentrate the sunlight creating a spot of light
with radial symmetry, which does not match with the conventional rectangular solar cells receivers. Our approach for
reducing the severe optical mismatch consists of using a receiver with radial arrangement of the cells into circular sectors that
can minimise the current mismatch. It guarantees that the circular sectors are receiving the same amount of light due to their
radial distribution. On the other hand, when tracking errors move the focus off the central position, interconnection of
opposite circular sectors in parallel can compensate the current mismatch and so the power losses are significantly reduced.
MOCVD Technology for III-V Based Concentrator Solar Cells
Creators: name: Parekh, A.
name: Ebert, C.
name: Armour, E.
name: Pulwin, Z.
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; 932-935
description: Veeco Turbodisc™ MOCVD reactors provide a high throughput, low cost of ownership platform in which to produce III-V based materials in the manufacture of solar cells for concentrator and space PVC applications. The new generation E475 As/P Veeco reactor has improved hardware for optimum source injection, larger batch sizes, and advanced in situ monitoring tools that can produce highly
uniform epitaxial layers with low oxygen and carbon background, low defect densities, and abrupt interfaces. With multiple wafer runs, GaAs growth rates of 15 μ/hr, and process times of 85 minutes over 200 - 100mm triple junction solar cell wafers can be produced per day. Veeco MOCVD technology is an enabling technology in the production of III-V solar cells.
High Efficiency Gallium Arsenide Based Solar Cells Using Indium-Tin-Oxide Nano-Columns
Creators: name: Chang, C.H.
name: Yang, C.S.
name: Chiu, C.H.
name: Tsai, M.A.
name: Yu, P.
name: Kuo, H.C.
name: Tsai, C.C.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Advanced Photovoltaics
Solar Cells, Modules and PV Systems for Space Applications

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 941-943
description: Arrays of conductive Indium-Tin-Oxide (ITO) nano-columns are deposited on GaAs-based solar cells using an oblique-angle deposition method. Calculations based on a rigorous coupled-wave analysis method show that such ITO nano-columns offer superior angular and spectral anti-reflective (AR) properties. The optical characteristics of the ITO nano-columns are described. The conversion efficiency of GaAs solar cells with ITO nano-columns as the AR coating is increased by 28%, mainly limited by the Al0.8Ga0.2As window layer.
Electrical Property and Cell Fabrication of GaAsN Thin Films Grown by Chemical Beam Epitaxy
Creators: name: Kojima, N.
name: Suzuki, H.
name: Nishimura, K.
name: Hashiguchi, T.
name: Saito, K.
name: Balasubramanian, B.
name: Yamamoto, S.
name: Inagaki, M.
name: Ohshita, Y.
name: Yamaguchi, M.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Advanced Photovoltaics
Solar Cells, Modules and PV Systems for Space Applications

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 944-946
description: GaAsN materials grown by chemical beam epitaxy (CBE) were investigated, as a preliminary step to realizing super-high efficiency four junction solar cells. We achieved the reduction of residual impurity concentration by chemical reaction control on the growing surface by modifying flow sequence of precursors and by
increasing step density on the surface by using a vicinal GaAs substrate. Furthermore, the improvement in carrier mobility was observed, and it was suggested that the reduction of both residual impurities and N-related defects leads this improvement. The residual acceptor concentration is also decreased by decreasing residual impurities, and n-type doping was enabled. We have successfully controlled electron concentration from 1015 to 1018 cm–3 by Si doping using a SiH4 gas. Based on these results GaAsN homo-junction solar cells were fabricated by CBE.
Effect of High Energy Electron Beam Irradiation to GaN Photodiode
Creators: name: Lee, D.U.
name: Kim, E.-K.
name: Han, Y.H.
name: Lee, B.C.
name: Oh, D.K.
name: Han, I.K.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Advanced Photovoltaics
Solar Cells, Modules and PV Systems for Space Applications

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 777-780
description: Electron-beam irradiated GaN n+-p photodiodes were characterized by a deep level transient spectroscopy (DLTS) and a light induced current density measurements. The GaN n+-p photodiode structures were grown by using metal organic chemical vapor deposition technique, and the electron irradiation was done by the energies of 1 MeV and 2 MeV with dose of 1x1015 cm-2 and 1x1016 cm-2. In DLTS measurement, the defect states of Ev+0.16 eV, Ev+0.34 eV, Ev+0.29 eV and Ec-0.43 eV in the electron irradiated diodes appeared newly. The output current density of GaN n+-p photodiode was characterized in ultra-violet region from 300 nm to 350 nm, and then the current densities were decreased after electron beam irradiation.
World Record Module Efficiency for Large and Thin mc-Si MWT Cells
Creators: name: Bennett, I.J.
name: Tjengdrawira, C.
name: Mewe, A.A.
name: Lamers, M.W.P.E.
name: De Jong, P.C.
name: Weeber, A.W.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Components for PV Systems
PV Modules

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 3258-3261
description: We obtained an independently confirmed module aperture area efficiency of 16.4% using 36 large and
thin mc-Si metal-wrap-through (MWT) cells. This is an absolute increase of almost 1% compared to the previous
world record. The module was made using a conductive rear-side foil with conductive adhesive for the
interconnection. The module was constructed using a dedicated module manufacturing line that is designed to be able
to work with extremely thin cells and provide a high through-put of one sixty cell module per minute.
Highly Efficient Inverter System Using Higher DC and AC Voltage Levels for Lowering BOS Costs of PV Plants
Creators: name: Hantschel, J.
name: Seehuber, M.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Components for PV Systems
Balance of System Components

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 3267-3268
description: For lowering BOS costs of PV Plants, REFU Elektronik GmbH is convinced that a lot can be learned
from the wind industry. Higher DC and AC voltages levels can help to reduce cost and have positive effects on the
total system structure. A new inverter type based on the REFU UltraEta® topology enables the first move towards the
using of these higher voltages and impresses with high efficiencies.
Complements to Classic Topics of Circles Geometry
Creators: name: Patrascu, Ion
name: Smarandache, Florentin
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Mathematics (math.GM)
subject: FOS: Mathematics
subject: 52Cxx

description: We approach several themes of classical geometry of the circle and complete them with some original results, showing that not everything in traditional math is revealed, and that it still has an open character. The topics were chosen according to authors aspiration and attraction, as a poet writes lyrics about spring according to his emotions.
description: 180 pages; many geometrical figures
Tuberculosis following programmed cell death receptor-1 (PD-1) inhibitor in a patient with non-small cell lung cancer. Case report and literature review
Creators: name: Suliman, Aasir M.
name: Bek, Shaza A.
name: Elkhatim, Mohamed S.
name: Husain, Ahmed A.
name: Mismar, Ahmad Y.
name: Eldean, M. Z. Sharaf
name: Lengyel, Zsolt
name: Elazzazy, Shereen
name: Rasul, Kakil I.
name: Omar, Nabil E.
Publisher: name: Manara - Qatar Research Repository
Year: 2022
Subjects: Oncology and carcinogenesis

description: Immune checkpoint inhibitors (ICIs)—anti-programmed death-1 (PD-1) and their ligands (PD-L1 and PD-L2) have become widely used in the treatment of several malignancies. Many immune-related adverse events (irAEs) have been linked to these agents. Nonetheless, tuberculosis (TB) reactivation during their use is increasingly recognized and reported. Herein, we present a 58-year-old lady with advanced non-small cell lung cancer (NSCLC) ALK-negative, EGFR wild, and PD-L1 immune histochemistry (IHC) strongly positive in 95% of tumor cells, on ongoing treatment with Pembrolizumab as a first-line monotherapy. Our patient presented with 1-week history of productive cough and high-grade fever. Further workup yielded the diagnosis of pulmonary tuberculosis after her Pembrolizumab sixth cycle with positive AFB smear and TB PCR from BAL (rifampin resistance not detected), with negative HIV status. Hence, immunotherapy was held, and patient was commenced on anti-TB regimen. History revealed contact with active TB patient over the past decade, without previous documentation of latent TB or previous TB infection. Her sputum AFB smear remained persistently positive 4 weeks through anti-TB regimen course. Later, the patient was discharged after her sputum was cleared from AFB (two negative sets). In light of pembrolizumab mechanism of action as an immune checkpoint inhibitor, we suspected its implication on reactivating latent TB which was observed in our patient demonstrating features of pulmonary tuberculosis. She was not re-challenged with Pembrolizumab following TB diagnosis.Other Information Published in: Cancer Immunology, Immunotherapy
 License: https://creativecommons.org/licenses/by/4.0
See article on publisher's website: http://dx.doi.org/10.1007/s00262-020-02726-1
How Fast Does an MPP Tracker Really Need To Be?
Creators: name: Schmidt, H.
name: Burger, B.
name: Bussemas, U.
name: Elies, S.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Components for PV Systems
Balance of System Components

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 3273-3276
description: One essential question regarding Maximum Power Point Trackers (MPPTs) is how fast an MPP tracker
must be so that no unduly high energy losses occur. This question has been discussed controversially in the past, and
many of the statements have not been based on real measurements, but manly on assumptions and wishful thinking of the
companies’ advertising department. In this article, various influences on the position of the MPP and their typical time
constants will be presented. These are compared to the reaction time or speed of typical MPP search procedures. In particular,
measurement results from a real solar generator will show that the partial shading caused by rapidly passing
clouds and the associated significant short-term changes in the MPP voltage are not relevant to the energy output of the
whole system.
Possibilities for Prevention of Electrical Arcing in PV-Systems
Creators: name: Schimpf, F.
name: Norum, L.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Components for PV Systems
Balance of System Components

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 3277-3279
description: The purpose of the work is to protect the DC-wiring of PV-systems against safety hazards due to
electric arcing. The work analyses possible fault scenarios in the wiring and their meaning for the system safety.
Weaknesses of state-of-the-art PV-installations are shown and an approach for an “intelligent” DC-circuit-breaker is
presented. Results from an experimental setup are shown.
The view of AGN-host alignment via reflection spectroscopy
Creators: name: Middleton, Matthew J.
name: Parker, Michael L.
name: Reynolds, Christopher S.
name: Fabian, Andrew C.
name: Lohfink, Anne M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The fuelling of active galactic nuclei (AGN) - via material propagated through the galactic disc or via minor mergers - is expected to leave an imprint on the alignment of the sub-pc disc relative to the host galaxy's stellar disc. Determining the inclination of the inner disc usually relies on the launching angle of the jet; here instead we use the inclination derived from reflection fits to a sample of AGN. We determine the distorting effect of unmodeled Fe XXV/XXVI features and, via extensive simulations, determine the difference in disc inclination resulting from the use of relxill compared to reflionx. We compare inner disc inclinations to those for the host galaxy stellar disc derived from the Hubble formula and, via Monte-Carlo simulations, find a strong lack of a correlation (at >> 5-sigma) implying either widespread feeding via mergers if we assume the sample to be homogeneous, or that radiative disc warps are distorting our view of the emission. However, we find that by removing a small (~1/5) subset of AGN, the remaining sample is consistent with random sampling of an underlying 1:1 correlation (at the 3-sigma level). A heterogenous sample would likely imply that our view is not dominated by radiative disc warps but instead by different feeding mechanisms with the majority consistent with coplanar accretion (although this may be the result of selection bias), whilst a smaller but not insignificant fraction may have been fuelled by minor mergers in the recent history of the host galaxy.
description: 10 pages, 5 figures, accepted to MNRAS
Unconventional Device Concepts for Polymer Solar Cells
Creators: name: Veenstra, S.C.
name: Slooff, L.H.
name: Verhees, W.J.H.
name: Cobussen-Pool, E.M.
name: Barbot, A.
name: Lenzmann, F.O.
name: Kroon, J.M.
name: Sessolo, M.
name: Bolink, H.J.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Advanced Photovoltaics
Organic-based PV

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 84-88
description: The inclusion of metal-oxide layers in polymer solar cells enables the fabrication of a series of
unconventional device architectures. These devices include: semi-transparent polymer solar cells, devices with
inverted polarity, as well as devices with air stable electrodes. A proof-of-principle of these devices is presented. The
anticipated benefits of these novel device structures over conventional polymer solar cells are discussed.
Realization and Characterization of Small Molecule Tandem Organic Solar Cells
Creators: name: Timmreck, R.
name: Meiss, J.
name: Merten, A.
name: Schüppel, R.
name: Furno, M.
name: Uhrich, C.
name: Gnehr, W.-M.
name: Pfeiffer, M.
name: Riede, M.K.
name: Leo, K.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Advanced Photovoltaics
Organic-based PV

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 89-92
description: The tandem solar cell concept is an approach to achieve power conversion efficiencies well above 10%
with organic materials. The realization of such tandem organic solar cells contains several challenges concerning
device architecture. The main issues are an optimization of the thin-film optics of such devices, the choice of
adequate – preferably complementary – absorber materials, and an efficient electron-hole recombination contact
between both subcells of a tandem solar cell. These issues, especially current matching through optical engineering
of the stack, are systematically addressed in this paper. Furthermore, we discuss that the correct characterization of
organic tandem cells is challenging and discuss the determination of the external quantum efficiency. The result of
our studies is a tandem organic solar cell with 2 cm² active area and a certified efficiency of 6.07 %.
Highly Efficient Triple Phase String Inverter
Creators: name: Herold, M.
name: Ringe, T.
name: Keckeis, M.
name: Koch, K.
name: Knaup, P.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Components for PV Systems
Balance of System Components

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 3269-3272
description: The most demanding criterion for PV plants is efficiency. Besides the electrical efficiency of the
inverter, its reliability, easy and cost effective installation and low maintenance are key factors for a high efficiency of
a PV plant. The bottleneck for cost effective production of inverters fulfilling these requirements is given by the
availability of cheap commercial electrical components that allow designing robust systems with a high efficiency.
Thus innovative topologies are the key to reach that goal based on standard components. Moreover software control
strategies that minimize the switching losses and maximize the solar farming yield are highly attractive. The new
inverter design presented in this paper features three phase power fed to a public grid at the benefit of high efficiency,
robustness and advantageous installation.
Latest changes in the national low and medium voltage directives require online control of the power quality. The
proposed inverter has the ability to stabilize the grid voltage and frequency and thus is able to act like a conventional
power plant.
Insights into Quasar UV Spectra Using Unsupervised Clustering Analysis
Creators: name: Tammour, Aycha
name: Gallagher, Sarah C.
name: Daley, Mark
name: Richards, Gordon T.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Machine learning can provide powerful tools to detect patterns in multi-dimensional parameter space. We use K-means -a simple yet powerful unsupervised clustering algorithm which picks out structure in unlabeled data- to study a sample of quasar UV spectra from the Quasar Catalog of the 10th Data Release of the Sloan Digital Sky Survey of Paris et al. (2014). Detecting patterns in large datasets helps us gain insights into the physical conditions and processes giving rise to the observed properties of quasars. We use K-means to find clusters in the parameter space of the equivalent width (EW), the blue- and red-half-width at half-maximum (HWHM) of the Mg II 2800 A line, the C IV 1549 A line, and the C III] 1908 A blend in samples of Broad Absorption-Line (BAL) and non-BAL quasars at redshift 1.6-2.1. Using this method, we successfully recover correlations well-known in the UV regime such as the anti-correlation between the EW and blueshift of the C IV emission line and the shape of the ionizing Spectra Energy distribution (SED) probed by the strength of He II and the Si III]/C III] ratio. We find this to be particularly evident when the properties of C III] are used to find the clusters, while those of Mg II proved to be less strongly correlated with the properties of the other lines in the spectra such as the width of C IV or the Si III]/C III] ratio. We conclude that unsupervised clustering methods (such as K-means) are powerful methods for finding "natural" binning boundaries in multidimensional datasets and discuss caveats and future work.
description: 17 pages, color figures, accepted for publication in MNRAS
Expression of immune checkpoints and T cell exhaustion markers in early and advanced stages of colorectal cancer
Creators: name: Saleh, Reem
name: Taha, Rowaida Z.
name: Toor, Salman M.
name: Sasidharan Nair, Varun
name: Murshed, Khaled
name: Khawar, Mahwish
name: Al-Dhaheri, Mahmood
name: Petkar, Mahir Abdulla
name: Abu Nada, Mohamed
name: Elkord, Eyad
Publisher: name: Manara - Qatar Research Repository
Year: 2022
Subjects: Oncology and carcinogenesis

description: Despite recent advances in colorectal cancer (CRC) treatment, a large proportion of patients show limited responses to therapies, especially in advanced stages. There is an urgent need to identify prognostic biomarkers and/or therapeutic targets in advanced stages, aiming to improve the efficacy of current treatments. We aimed to determine prognostic biomarkers in tumor tissue and circulation of CRC patients, with a special focus on T cell exhaustion markers. We found that mRNA levels of PD-1, TIM-3, CTLA-4, TIGIT, CD160, CD244, KLRG1, TOX2, TOX3, Ki-67, and PRDM1 were elevated in CRC tumor tissues. We also investigated differences in gene expression between early and advanced disease stages. We found that TOX and potentially TIM-3, CTLA-4, VISTA, TIGIT, KLRG1, TOX2, SIRT1, Ki-67, and Helios mRNA levels in tumor tissue were elevated in advanced disease stages, suggesting their potential roles in CRC progression. In contrast, PD-1 and CD160 levels in tumor tissue were downregulated in advanced stages. In the circulation of CRC patients, mRNA levels of PD-1, VISTA and LAG-3 were higher than those of healthy individuals. Moreover, in circulation, PD-1, CTLA-4 and TIGIT mRNA levels were reduced in advanced stages. Interestingly, levels of PD-1 in both tumor tissue and circulation were reduced in advanced stages, suggesting that targeting PD-1 in patients with advanced stages could be less effective. Altogether, these findings suggest some potential T cell exhaustion markers that could be utilized as prognostic biomarkers and/or therapeutic targets for CRC. However, further investigations and validations in larger cohorts are required to confirm these findings.Other Information Published in: Cancer Immunology, Immunotherapy
 License: https://creativecommons.org/licenses/by/4.0
See article on publisher's website: http://dx.doi.org/10.1007/s00262-020-02593-w
Experiences with Cable-Based Solar Wings Tracking System and Progress towards Two-Axis Large Scale Solar System
Creators: name: Baumgartner, F.P.
name: Büchel, A.
name: Bartholet, R.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Components for PV Systems
Balance of System Components

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 3285-3289
description: The Solar Wings Tracking system is a new light-weight cable-based tracking system, offering several
advantages, including double use of land, far lower demand for raw material, simple implementation of tracking
motion and inherent mechanical robustness. A first 650 kWp PV plant based on a one-axis Solar Wings tracking
system has been built and put into operation in Southern Germany in December 2008. The performance of the solar
park has been monitored since and successful tracking operation with excellent performance ratios of the hardware
applied has been confirmed. An AC yield of 1038kWh/Wp was measured in the period from January to August 2009
resulting in an about 20% higher energy yield than a fixed installation. Furthermore, a two axis system based on the
Solar Wings concept has been designed and will be implemented in November 2009. Moreover, results of tracking
combined with low optical concentration based on the Solar Wings concept has been demonstrated with a measured
increase of 60% of solar power in the PV module plane, on a small scale design. In summary, successful
implementation of a light weight cable-based light tracking system, offering double use of land, less raw material and
further benefits has been confirmed, opening up new perspectives towards large scale application and the
implementation of new concepts for increased energy yield of solar parks.
Imaging of the adult male urethra, penile prostheses and artificial urinary sphincters
Creators: name: Ramanathan, Subramaniyan
name: Raghu, Vineetha
name: Ramchandani, Parvati
Publisher: name: Manara - Qatar Research Repository
Year: 2022
Subjects: Clinical sciences

description: To discuss the imaging appearances of various pathologies affecting adult male urethra and to review the role of imaging in the assessment of artificial urinary sphincters and penile prostheses. Diagnosis of common male urethral diseases heavily depends on two conventional fluoroscopic techniques namely retrograde urethrography and voiding cystourethrography. These are useful in evaluating common urethral diseases like traumatic injury, infections, and strictures. Cross-sectional imaging can be useful in evaluating periurethral pathologies. Artificial urinary sphincters, slings, and periurethral bulking agents are used in the management of urinary incontinence and imaging can be utilized to detect complications in these devices. Cross-sectional imaging especially MRI plays a significant role in evaluating the different types of penile prostheses and their malfunctioning.Other Information Published in: Abdominal Radiology
 License: https://creativecommons.org/licenses/by/4.0
See article on publisher's website: http://dx.doi.org/10.1007/s00261-019-02356-x
New Approches to the Intermediate Band Solar Cell Concept
Creators: name: Luque, A.
name: Martí Vega, A.
name: Antolín, E.
name: Cánovas, E.
name: Linares, P.G.
name: Tablero, C.
name: Fuertes Marrón, D.
name: Tobías Galicia, I.
name: Mendes, M.
name: Mellor, A.
name: Levy, M.Y.
name: Hernández, E.
name: Stanley, C.R.
name: Farmer, C.D.
name: Campion, R.P.
name: Novikov, S.V.
name: Foxon, C.T.
name: Scheer, R.
name: Marsen, B.
name: Schock, H.-W.
name: González, G.
name: Martil, I.
name: Olea, J.
name: Pastor, D.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Advanced Photovoltaics
Fundamental Studies

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 7-14
description: The development of the intermediate band solar cell is attracting more attention every day as new
results appear. In this paper we aim to describe the evolution of the research from an initial theoretical proposal to the
first stages of implementation using quantum dots and the experimental proof of the concepts, followed by the effort
of finding bulk intermediate band materials and cells, and the demonstration of how the achievement of an
intermediate band suppresses the non-radiative recombination attributed to deep centres. Finally, the project
IBPOWER that continues EC support for the intermediate band concept is also described.
Efficiency Enhancement in Strain-Balanced Quantum Well Solar Cells via Anisotropic Emission
Creators: name: Adams, J.G.J.
name: Elder, W.
name: Stavrinou, P.
name: Barnham, K.W.J.
name: Ekins-Daukes, N.J.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Advanced Photovoltaics
Fundamental Studies

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 19-21
description: The strain-balanced quantum well solar cell benefits from a fundamental efficiency enhancement due
to anisotropic emission from the quantum wells. This anisotropy arises from a splitting of the valence band due to
compressive strain in the quantum wells, suppressing a transition which contributes to emission from the edge of the
quantum wells. The extent of the suppression has been calculated using k.p theory. Detailed balance modelling was
used to determine the limiting efficiencies for cells containing quantum wells under varying degrees of strain, and
cells with highly strained quantum wells were found to benefit from a greater efficiency enhancement relative to a
cell that emits isotropically. Since biaxial strain in a solar cell can only be achieved on the nano-scale, nanostructured
quantum well cells are seen to have a fundamental efficiency advantage over bulk semi-conductor solar
cells.
Testing of Bifacial Tracking Ridge Concentrator PV System at the Czech University of Life Sciences (CULS) in Prague
Creators: name: Libra, M.
name: Poulek, V.
name: Mares, J.
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; 926-931
description: We increase the amount of produced energy from photovoltaic (PV) panels by the new construction of the solar PV system. The usage of our tracking stand TRAXLETM was appropriate. The passive solar tracker TRAXLETM and the tracking soft ridge concentrator were developed in co-operation of the CULS Prague and fa. Poulek Solar, Ltd. The small ongrid solar PV system 2 x 2 kWp was constructed and installed at the Czech University of Life Sciences Prague. Similar PV systems can be used as off-grid or on-grid power supplying device in agriculture. The identical PV panels are compared. PV panels (2 kWp) were fixed and PV panels (2 kWp) were located on the tracking stand TRAXLETM with the soft ridge concentrator. The produced energy amount is equal to the integral ∫  = t E P.dt , where P is the
instantaneous power and t is the daytime. The solar tracking system with the soft ridge concentrator yields the energy surplus up to 100% during sunny days in sunny countries. We expect the energy surplus up to 60% in the Czech Republic (50° of north latitude) during summer sunny days. The energy surplus corresponds with the lower price of the solar energy. Economic calculation shows, that the solar system with tracking stand and soft ridge concentrator is cheaper, when we compare two systems which produce the some amount of the energy. The tracking stand is more expensive than the fixed, but we can save some PV panels, and the price of the PV panels is the most significant part of the price of the whole solar PV system. At the present time, the data from our new PV system are collected. The results correspond with our above mentioned presumption.
Chinese dragon sign: splenic artery calcification
Creators: name: Ramanathan, Subramaniyan
Publisher: name: Manara - Qatar Research Repository
Year: 2022
Subjects: Clinical sciences

description: Chinese dragon sign: splenic artery calcificationOther Information Published in: Abdominal Radiology
 License: https://creativecommons.org/licenses/by/4.0
See article on publisher's website: http://dx.doi.org/10.1007/s00261-019-02054-8
Imaging of anorectal malformations: where are we now? Abdominal imaging task force of the European Society of Paediatric Radiology
Creators: name: Stafrace, Samuel
name: Lobo, Luisa
name: Augdal, Thomas A.
name: Avni, Fred Efraim
name: Bruno, Costanza
name: Damasio, Maria Beatrice
name: Darge, Kassa
name: Franchi-Abella, Stéphanie
name: Herrmann, Jochen
name: Ibe, Donald
name: Kljucevsek, Damjana
name: Mentzel, Hans-Joachim
name: Napolitano, Marcello
name: Ntoulia, Aikaterini
name: Ording-Müller, Lil-Sofie
name: Perucca, Giulia
name: Petit, Philippe
name: Smets, Anne M.
name: Toso, Seema
name: Woźniak, Magdalena Maria
name: Riccabona, Michael
Publisher: name: Manara - Qatar Research Repository
Year: 2022
Subjects: Clinical sciences
Paediatrics

description: Anorectal and cloacal malformations are a broad mix of congenital abnormalities related to the distal rectum and anus. Confusion exists between all the forms in this large and heterogeneous group. The spectrum includes everything from anal stenosis, ventral anus, anal atresia (with and without fistula) and the full spectrum of cloacal malformations. Imaging in these conditions is done through the whole armamentarium of radiologic modalities, with very different imaging strategies seen across the centres where these conditions are managed. In 2017, the European Society of Paediatric Radiology (ESPR) abdominal imaging task force issued recommendations on the imaging algorithm and standards for imaging anorectal malformations. This was followed by further letters and clarifications together with an active multispecialty session on the different imaging modalities for anorectal malformations at the 2018 ESPR meeting in Berlin. Through this paper, the abdominal task force updates its guidelines and recommended imaging algorithm for anorectal malformations.Other Information Published in: Pediatric Radiology
 License: https://creativecommons.org/licenses/by/4.0
See article on publisher's website: http://dx.doi.org/10.1007/s00247-022-05395-7
Unparticle contribution to the hydrogen atom ground state energy
Creators: name: Wondrak, Michael F.
name: Nicolini, Piero
name: Bleicher, Marcus
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: In the present work we study the effect of unparticle modified static potentials on the energy levels of the hydrogen atom. By using Rayleigh-Schrödinger perturbation theory, we obtain the energy shift of the ground state and we compare it with experimental data. Bounds on the unparticle energy scale $Λ_\mathcal{U}$ as a function of the scaling dimension $d_\mathcal{U}$ and the coupling constant $λ$ are derived. We show that there exists a parameter region where bounds on $Λ_\mathcal{U}$ are stringent, signalling that unparticles could be tested in atomic physics experiments.
description: 11 pages, 3 figures
Measurement Precaution for Concentrator MJ Solar Cell Modules
Creators: name: Timò, G.
name: Minuto, A.
name: Malvisi, E.
name: Smekens, G.
name: Sturm, M.
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; 936-940
description: A frequency response analysis of multijunction (MJ) concentrator modules has been carried out and compared with the frequency response analysis of single junction (SJ) concentration modules, considering different module cells connection scheme. It has been found that the current time response of the module to voltage step variation is mainly dependent on module cell layout and less dependent on the cell type. Module response time of few microsecond limits the number of I-V points to be acquired during the short duration of the flash simulator. Measurement precaution were identified in relation to the dark IV test considered in the IEC 62108 normative. We found that during this test, shunts effects can be induced by current polarisation, in relation to the particular cell connection scheme adopted in the module. Further, negative resistance behaviour on the CPV module IV curve over a certain current threshold was detected. CPV module electroluminescence and a detailed I-V characterisation of the receivers and cells have been carried out in order to explain the shunts effects and the I-V curve behaviour.
Topsy-Turvy Heart with Aortopulmonary Window and Severe Airway Malacia: Prenatal Diagnosis and Review of the Literature
Creators: name: Hejazi, Yahia
name: Mann, Gurdeep
name: Boudjemline, Younes
name: Udassi, Jai P.
name: Van Leeuwen, Grace
name: Diab, Karim A.
Publisher: name: Manara - Qatar Research Repository
Year: 2022
Subjects: Cardiovascular medicine and haematology
Paediatrics

description: The topsy-turvy heart is a very rare cardiac malformation that involves a global 90° clockwise rotation of the heart along its long axis. This rotation results in the displacement of the great arteries and severe elongation and stretching of the brachiocephalic arteries and the bronchi. We present an unusual case of topsy-turvy heart diagnosed prenatally with a large aorto-pulmonary window and. This case gives an insight into the morphological details and clinical presentation of this rare malformation and its associated complications. We also present a review of the literature of this rare anomaly showing only 15 live cases that have been published with only three cases diagnosed prenatally.Other Information Published in: Pediatric Cardiology
 License: https://creativecommons.org/licenses/by/4.0
See article on publisher's website: http://dx.doi.org/10.1007/s00246-021-02710-1
Lattice Induced Transparency in Metasurfaces
Creators: name: Manjappa, Manukumara
name: Srivastava, Yogesh Kumar
name: Singh, Ranjan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Lattice modes are intrinsic to the periodic structures and their occurrence can be easily tuned and controlled by changing the lattice constant of the structural array. Previous studies have revealed excitation of sharp absorption resonances due to lattice mode coupling with the plasmonic resonances. Here, we report the first experimental observation of a lattice induced transparency (LIT) by coupling the first order lattice mode (FOLM) to the structural resonance of a metamaterial resonator at terahertz frequencies. The observed sharp transparency is a result of the destructive interference between the bright mode and the FOLM mediated dark mode. As the FOLM is swept across the metamaterial resonance, the transparency band undergoes large change in its bandwidth and resonance position. Besides controlling the transparency behaviour, LIT also shows a huge enhancement in the Q-factor and record high group delay of 28 ps, which could be pivotal in ultrasensitive sensing and slow light device applications.
description: 5 figures
Neutrino Induced 4He Break-up Reaction -- Application of the Maximum Entropy Method in Calculating Nuclear Strength Function
Creators: name: Murata, T.
name: Horiuchi, W.
name: Sato, T.
name: Nakamura, S. X.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The maximum entropy method is examined as a new tool for solving the ill-posed inversion problem involved in the Lorentz integral transformation (LIT) method. As an example, we apply the method to the spin-dipole strength function of 4He. We show that the method can be successfully used for inversion of LIT, provided the LIT function is available with a sufficient accuracy.
description: 5 pages, 2 figures. Poster presented by TM at the International Workshop on Neutrino-Nucleus Interaction in the Few-GeV Region (NuInt15), Novenber 16-21 2015, Osaka, Japan