cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Sustainability of PV Systems: Comparing Some Technologies Life Cycle Assessment and Bio Compatible Investigation within Architecture
Creators: name: Pellegrino, M.
name: Francese, D.
name: Filagrossi Ambrosino, C.
name: Di Matteo, C.
Publisher: name: WIP-Munich
Year: 2009
Subjects: PV Systems
PV and Architecture

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 4280-4284
description: Employment of Photovoltaics in Architecture has always been well accepted for its green appearance
and for the idea that it is sustainable. This paper, billing with the subject of the PV, will focus on the advantages of
this system in Architecture, by comparing the LCA (Life Cycle Assessment) of the crystalline silicon technology and
the thin film one, and results will be presented in the paper. The life of the PV module has been divided into
manufacturing, installation, operation and decommissioning steps. For all these stages energy and material flows have
been considered. Then the VADE methodology has been applied for assessing the eco-sustainability of an ecological
building taken as case-study. The results show that thin film technology represents at the moment the most acceptable
solution from the environmental point of view.
­­Atg9 interactions via its transmembrane domains are required for phagophore expansion during autophagy
Creators: name: Ramirez, Sabrina Chumpen
name: Gómez-Sánchez, Rubén
name: Verlhac, Pauline
name: Hardenberg, Ralph
name: Margheritis, Eleonora
name: Cosentino, Katia
name: Reggiori, Fulvio
name: Ungermann, Christian
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biophysics
subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Genetics
subject: Molecular Biology
subject: Neuroscience
subject: Evolutionary Biology
subject: Cancer

description: During macroautophagy/autophagy, precursor cisterna known as phagophores expand and sequester portions of the cytoplasm and/or organelles, and subsequently close resulting in double-membrane transport vesicles called autophagosomes. Autophagosomes fuse with lysosomes/vacuoles to allow the degradation and recycling of their cargoes. We previously showed that sequential binding of yeast Atg2 and Atg18 to Atg9, the only conserved transmembrane protein in autophagy, at the extremities of the phagophore mediates the establishment of membrane contact sites between the phagophore and the endoplasmic reticulum. As the Atg2-Atg18 complex transfers lipids between adjacent membranes in vitro, it has been postulated that this activity and the scramblase activity of the trimers formed by Atg9 are required for the phagophore expansion. Here, we present evidence that Atg9 indeed promotes Atg2-Atg18 complex-mediated lipid transfer in vitro, although this is not the only requirement for its function in vivo. In particular, we show that Atg9 function is dramatically compromised by a F627A mutation within the conserved interface between the transmembrane domains of the Atg9 monomers. Although Atg9F627A self-interacts and binds to the Atg2-Atg18 complex, the F627A mutation blocks the phagophore expansion and thus autophagy progression. This phenotype is conserved because the corresponding human ATG9A mutant severely impairs autophagy as well. Importantly, Atg9F627A has identical scramblase activity in vitro like Atg9, and as with the wild-type protein enhances Atg2-Atg18-mediated lipid transfer. Collectively, our data reveal that interactions of Atg9 trimers via their transmembrane segments play a key role in phagophore expansion beyond Atg9ʹs role as a lipid scramblase.Abbreviations: BafA1: bafilomycin A1; Cvt: cytoplasm-to-vacuole targeting; Cryo-EM: cryo-electron microscopy; ER: endoplasmic reticulum; GFP: green fluorescent protein; MAP1LC3/LC3: microtubule associated protein 1 light chain 3; MCS: membrane contact site; NBD-PE: N-(7-nitrobenz-2-oxa-1,3-diazol-4-yl)-1,2-dihexadecanoyl-sn-glycero-3-phosphoethanolamine; PAS: phagophore assembly site; PE: phosphatidylethanolamine; prApe1: precursor Ape1; PtdIns3P: phosphatidylinositol-3-phosphate; SLB: supported lipid bilayer; SUV: small unilamellar vesicle; TMD: transmembrane domain; WT: wild type
A New Process for Laser Edge Isolation of Crystalline Solar Cells
Creators: name: Haupt, O.
name: Schoonderbeek, A.
name: Richter, L.
name: Kling, R.
name: Ostendorf, A.
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; 1374-1376
description: We developed a novel laser process which can be used for edge isolation of crystalline solar cells without any damage to the active area. Today laser edge isolation processes cause damage to the material and the deposited material reduces the efficiency by shadowing the active area. Generally, all processes use the mechanism of ablating where the silicon is melted or vaporized along a path around the solar cell. The new process separates a small strip around the solar cell by using thermally induced stress. This is possible by heating the material in an uncritical temperature range where silicon deforms elastically. Due to the homogeneous edge, the fracture strength increases which creates less faulty specimens. This effect is especially applicable for the trend of producing thinner solar cells in the near future.
In this paper, experimental investigations for the new thermally induced separating process will be shown. The achieved edge quality is compared with conventional laser ablation processes by using a three-point bending test.
Immersive virtual reality to enforce teaching in engineering education
Creators: name: Halabi, Osama
Publisher: name: Manara - Qatar Research Repository
Year: 2022
Subjects: Distributed computing and systems software
Graphics, augmented reality and games

description: Prior studies on the use of digital prototyping and virtual reality (VR) in designing as well as evaluating new products have shown that VR reduces both development time and costs whilst augmenting student motivation and creativity. The current study demonstrates that VR and 3D prototyping in the context of project-based learning (PBL) promote effective communication, increase problem solving skills, and enhance learning outcomes. VR and digital prototyping have been extensively used in industries for the purpose of product design and usability evaluation. In the context of engineering education, many research studies have attempted to explore the effect of VR on teamwork, engagement, retention, and motivation. In this paper, VR is used in conjunction with PBL in self-directed approach to design and implement a product using 3D software whilst also using virtual reality immersive CAVE display to evaluate their design. The hypothesis is that the use of VR with a project-based-learning approach to facilitate the attainment of desirable goals in the engineering design project, improved achievement of course learning outcomes and promoted effective communication. According to the research findings, VR approach significantly affected the distribution of cumulative project grades. Students’ project grades improved, particularly the implementation component. In addition, the course outcomes related to project design were better achieved in VR approach. The communication and problem-solving skills were improved in the VR approach as compared to traditional approach.Other Information Published in: Multimedia Tools and Applications
 License: https://creativecommons.org/licenses/by/4.0
See article on publisher's website: http://dx.doi.org/10.1007/s11042-019-08214-8
Laser Fired Contacts on Amorphous Silicon Deposited by Hot-Wire CVD on Crystalline Silicon
Creators: name: Blanque, S.
name: Voz, C.
name: Muñoz, D.
name: Martín, I.
name: Orpella, A.
name: Puigdollers, J.
name: Alcubilla, R.
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; 1393-1396
description: In this work we study aluminium laser-fired contacts for intrinsic amorphous silicon layers deposited by Hot-Wire CVD. This structure could be used as an alternative low temperature back contact for rear passivated heterojunction solar cells. An infrared Nd:YAG laser (1064 nm) has been used to locally fire the aluminium through thin amorphous silicon passivating layers. We discuss here the optimization of the laser firing parameters, very low specific contact resistances (up to rc= 4,6 mW.cm2) have been obtained on 2.8 W·cm p-type c-Si wafers but with a strong damage of the sample. While for a set of optimized laser conditions we obtain a low specific contact resistance (rc= 12,2 mW.cm2) with a low damage rate (19,96 %). Moreover this investigation focuses on maintaining the passivation quality of the interface
Hidden quantum mirage by negative refraction in semiconductor P-N junctions
Creators: name: Zhang, Shu-Hui
name: Zhu, Jia-Ji
name: Yang, Wen
name: Lin, Hai-Qing
name: Chang, Kai
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We predict a novel quantum interference based on the negative refraction across a semiconductor P-N junction: with a local pump on one side of the junction, the response of a local probe on the other side behaves as if the disturbance emanates not from the pump but instead from its mirror image about the junction. This phenomenon is guaranteed by translational invariance of the system and matching of Fermi surfaces of the constituent materials, thus it is robust against other details of the junction (e.g., junction width, potential profile, and even disorder). The recently fabricated P-N junctions in 2D semiconductors provide ideal platforms to explore this phenomenon and its applications to dramatically enhance charge and spin transport as well as carrier-mediated long-range correlation.
Bioinformatics classification of mutations in patients with Mucopolysaccharidosis IIIA
Creators: name: Tanwar, Himani
name: Kumar, D. Thirumal
name: Doss, C. George Priya
name: Zayed, Hatem
Publisher: name: Manara - Qatar Research Repository
Year: 2022
Subjects: subject: Neurosciences
subject: FOS: Clinical medicine

description: Mucopolysaccharidosis (MPS) IIIA, also known as Sanfilippo syndrome type A, is a severe, progressive disease that affects the central nervous system (CNS). MPS IIIA is inherited in an autosomal recessive manner and is caused by a deficiency in the lysosomal enzyme sulfamidase, which is required for the degradation of heparan sulfate. The sulfamidase is produced by the N-sulphoglucosamine sulphohydrolase (SGSH) gene. In MPS IIIA patients, the excess of lysosomal storage of heparan sulfate often leads to mental retardation, hyperactive behavior, and connective tissue impairments, which occur due to various known missense mutations in the SGSH, leading to protein dysfunction. In this study, we focused on three mutations (R74C, S66W, and R245H) based on in silico pathogenic, conservation, and stability prediction tool studies. The three mutations were further subjected to molecular dynamic simulation (MDS) analysis using GROMACS simulation software to observe the structural changes they induced, and all the mutants exhibited maximum deviation patterns compared with the native protein. Conformational changes were observed in the mutants based on various geometrical parameters, such as conformational stability, fluctuation, and compactness, followed by hydrogen bonding, physicochemical properties, principal component analysis (PCA), and salt bridge analyses, which further validated the underlying cause of the protein instability. Additionally, secondary structure and surrounding amino acid analyses further confirmed the above results indicating the loss of protein function in the mutants compared with the native protein. The present results reveal the effects of three mutations on the enzymatic activity of sulfamidase, providing a molecular explanation for the cause of the disease. Thus, this study allows for a better understanding of the effect of SGSH mutations through the use of various computational approaches in terms of both structure and functions and provides a platform for the development of therapeutic drugs and potential disease treatments.Other Information Published in: Metabolic Brain Disease
 License: https://creativecommons.org/licenses/by/4.0
See article on publisher's website: http://dx.doi.org/10.1007/s11011-019-00465-6
Polymer quantization in the Bogoliubov's regime for a homogeneous one-dimensional Bose-Einstein condensate
Creators: name: Castellanos, Elías
name: Chacón-Acosta, Guillermo
name: Hernández-Hernández, Héctor H.
name: Santos, Elí
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In the present report we analyze the eventual modifications caused by the polymer quantization upon the ground state of a homogeneous one-dimensional Bose-Einstein condensate. We obtain the ground state energy of the corresponding N-body system and, consequently, the corresponding speed of sound, allowing us to explore the sensitivity of the system to corrections caused by the polymer quantization. The corrections arising from the polymer quantization can be improved for dense systems together with small values of the corresponding one-dimensional scattering length. However, these corrections remain constrained due to finite size effects of the system. The contributions of the polymer length scale to the properties of the ground state energy of the system allow us to explore, as a first approximation and when the Bogoliubov's formalism is valid, the sensitivity of this many-body system to traces caused by the discreteness of space suggested by the polymer quantization.
description: 6 pages. arXiv admin note: text overlap with arXiv:1604.01730
Thin Film Solar Cells on Glass Based on Single Crystalline Silicon Nanowires
Creators: name: Andrä, G.
name: Pietsch, M.
name: Sivakov, V.
name: Falk, F.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Advanced Photovoltaics
New Materials, Cells and Modules

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 418-420
description: Silicon nanowire thin film solar cells on glass were investigated. On a borosilicate glass substrate a
multicrystalline boron doped silicon base layer was prepared by laser crystallization. The surface of this film was
silanized and covered by gold colloids. By VLS growth phosphorus doped silicon nanowires were grown with
diameters in the 30 to 150 nm range. The nanowire carpet was embedded into PMMA and contacted by Al. If the
base layer has a doping profile so that the surface was only weakly boron doped, the system shows rectifying and
photovoltaic behavior. Obviously an axial pn-junction between the nanowires and the base layer formed.
Coefficient estimates of analytic endomorphisms of the unit disk fixing a point with applications to concave functions
Creators: name: Ohno, Rintaro
name: Sugawa, Toshiyuki
Publisher: name: arXiv
Year: 2015
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 30C45

description: In this note, we discuss the coefficient regions of analytic self-maps of the unit disk with a prescribed fixed point. As an application, we solve the Fekete-Szegő problem for normalized concave functions with a prescribed pole in the unit disk.
description: 13 pages, 2 figures
$^9$Be elastic scattering on $^{208}$Pb and $^{27}$Al within a four-body reaction framework
Creators: name: Casal, J.
name: Rodríguez-Gallardo, M.
name: Arias, J. M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We investigate the low-energy $^9$Be elastic scattering on two different targets (heavy, light) within a four-body framework using the Continuum-Discretized Coupled-Channels (CDCC) method. The $^9$Be projectile is described in a $α+ α+ n$ three-body model using the analytical transformed harmonic oscillator (THO) basis in hyperspherical coordinates. We show that continuum couplings are important to describe the elastic cross section, especially at low energies and on heavy targets. The dipolar contribution to the elastic cross section at energies around the Coulomb barrier is important but small compared to the case of halo nuclei. The effect of the projectile low-energy resonances is also relevant. The agreement with the available experimental data supports the reliability of the method to describe reactions induced by three-body projectiles including more than one charged particle.
description: 9 pages, 11 figures
Line-of-sight velocity and metallicity measurements of the Palomar 5 tidal stream
Creators: name: Ishigaki, Miho N.
name: Hwang, Narae
name: Chiba, Masashi
name: Aoki, Wako
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present Subaru/FOCAS and Keck/DEIMOS medium-resolution spectroscopy of a tidally disrupting Milky Way (MW) globular cluster Palomar 5 and its tidal stream. The observed fields are located to cover an angular extent of $\sim 17$\arcdeg along the stream, providing an opportunity to investigate a trend in line-of-sight velocities ($V_{\rm los}$) along the stream, which is essential to constrain its orbit and underlying gravitational potential of the Milky Way's dark matter halo. A spectral fitting technique is applied to the observed spectra to obtain stellar parameters and metallicities ([Fe/H]) of the target stars. The 19 stars most likely belonging to the central Pal 5 cluster have a mean $V_{\rm los}$ of $-58.1\pm 0.7$ km s$^{-1}$ and metallicity [Fe/H]$=-1.35\pm 0.06$ dex, both of which are in good agreement with those derived in previous high-resolution spectroscopic studies. Assuming that the stream stars have the same [Fe/H] as the progenitor cluster, the derived [Fe/H] and $V_{\rm los}$ values are used to estimate the possible $V_{\rm los}$ range of the member stars at each location along the stream. Because of the heavy contamination of the field MW stars, estimated $V_{\rm los}$ range depends on prior assumptions about the stream's $V_{\rm los}$, which highlights the importance of more definitely identifying the member stars using proper motion and chemical abundances to obtain an unbiased information of $V_{\rm los}$ in the outer part of the Pal 5 stream. The models for the gravitational potential of the MW's dark matter halo that are compatible with the estimated $V_{\rm los}$ range are discussed.
description: 14 pages, 13 figures. Accepted for publication in ApJ
Optimisation of the Metal Grid on the Selective n/n+ and Single Step n+ Emitter Structures With the Base Influence
Creators: name: Janusonis, J.
name: Galdikas, A.
name: Ulbikas, J.
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; 1383-1387
description: Selective emitter structures are more effective in terms of solar cell efficiency. In this paper the optimization of the selective n/n+ and single step n+ emitters together with Ti:Pd:Ag and Ni:Cu metal grid was performed. Single step and selective emitters were also compared when the base recombination mechanisms are taken into account. It was shown that even with lower minority charge carrier lifetimes the selective emitter performance is superior to the n+.
J-GEM Follow-Up Observations to Search for an Optical Counterpart of The First Gravitational Wave Source GW150914
Creators: name: Morokuma, Tomoki
name: Tanaka, Masaomi
name: Asakura, Yuichiro
name: Abe, Fumio
name: Tristram, Paul J.
name: Utsumi, Yousuke
name: Doi, Mamoru
name: Fujisawa, Kenta
name: Itoh, Ryosuke
name: Itoh, Yoichi
name: Kawabata, Koji S.
name: Kawai, Nobuyuki
name: Kuroda, Daisuke
name: Matsubayashi, Kazuya
name: Motohara, Kentaro
name: Murata, Katsuhiro L.
name: Nagayama, Takahiro
name: Ohta, Kouji
name: Saito, Yoshihiko
name: Tamura, Yoichi
name: Tominaga, Nozomu
name: Uemura, Makoto
name: Yanagisawa, Kenshi
name: Yatsu, Yoichi
name: Yoshida, Michitoshi
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We present our optical follow-up observations to search for an electromagnetic counterpart of the first gravitational wave source GW150914 in the framework of the Japanese collaboration for Gravitational wave ElectroMagnetic follow-up (J-GEM), which is an observing group utilizing optical and radio telescopes in Japan, as well as those in New Zealand, China, South Africa, Chile, and Hawaii. We carried out a wide-field imaging survey with Kiso Wide Field Camera (KWFC) on the 1.05-m Kiso Schmidt telescope in Japan and a galaxy-targeted survey with Tripole5 on the B&C 61-cm telescope in New Zealand. Approximately 24 deg2 regions in total were surveyed in i-band with KWFC and 18 nearby galaxies were observed with Tripole5 in g-, r-, and i-bands 4-12 days after the gravitational wave detection. Median 5-sigma depths are i~18.9 mag for the KWFC data and g~18.9 mag, r~18.7 mag, and i~18.3 mag for the Tripole5 data. Probability for a counterpart to be in the observed area is 1.2% in the initial skymap and 0.1% in the final skymap. We do not find any transient source associated to an external galaxy with spatial offset from its center, which is consistent with the local supernova rate. We summarize future prospects and ongoing efforts to pin down electromagnetic counterparts of binary black hole mergers as well as neutron star mergers.
description: submitted to PASJ, 7 pages, 1 figure, 4 tables
Theoretical Analysis of Energy Selective Contacts with Si QDs In SiO2 Matrix with SiC Barriers Using a 2 Dimensional Model
Creators: name: Puthen-Veettil, B.
name: König, D.
name: Conibeer, G.
name: Green, M.A.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Advanced Photovoltaics
New Materials, Cells and Modules

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 427-430
description: Double barrier Quantum Dot structures are potential candidates for Energy Selective Contacts for Hot
Carrier Solar Cells. Silicon QDs in SiO2 matrix with SiC barriers make a very effective Energy Selective Contact and
has several advantages over the same structure with SiO2 barriers. In this paper, the Energy Selective Contacts are
studied for their energy selectivity using a two dimensional scattering matrix model. The improvement in conduction
by using SiC barriers compared to that by using SiO2 barriers is studied quantitatively. The impacts of
configurational and morphological disorders of the dots on the filtering properties of Energy Selective Contacts are
analyzed. The impacts of external electric field and temperature on the electrical properties of the QD structure are
also studied and the I-V characteristics is obtained.
The Cologne Database for Molecular Spectroscopy, CDMS, in the Virtual Atomic and Molecular Data Centre, VAMDC
Creators: name: Endres, Christian P.
name: Schlemmer, Stephan
name: Schilke, Peter
name: Stutzki, Jürgen
name: Müller, Holger S. P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The CDMS was founded 1998 to provide in its catalog section line lists of molecular species which may be observed in various astronomical sources using radio astronomy. The line lists contain transition frequencies with qualified accuracies, intensities, quantum numbers, as well as further auxilary information. They have been generated from critically evaluated experimental line lists, mostly from laboratory experiments, employing established Hamiltonian models. Seperate entries exist for different isotopic species and usually also for different vibrational states. As of December 2015, the number of entries is 792. They are available online as ascii tables with additional files documenting information on the entries. The Virtual Atomic and Molecular Data Centre was founded more than 5 years ago as a common platform for atomic and molecular data. This platform facilitates exchange not only between spectroscopic databases related to astrophysics or astrochemistry, but also with collisional and kinetic databases. A dedicated infrastructure was developed to provide a common data format in the various databases enabling queries to a large variety of databases on atomic and molecular data at once. For CDMS, the incorporation in VAMDC was combined with several modifications on the generation of CDMS catalog entries. Here we introduce related changes to the data structure and the data content in the CDMS. The new data scheme allows us to incorporate all previous data entries but in addition allows us also to include entries based on new theoretical descriptions. Moreover, the CDMS entries have been transferred into a mySQL database format. These developments within the VAMDC framework have been driven by the needs of the astronomical community to be able to deal efficiently with large data sets obtained with the Herschel Space Telescope or, more recently, with the Atacama Large Millimeter Array.
description: 16 pages, no tables, 2 figures; Journal of Molecular Spectroscopy, Special Issue on Databases, accepted. Abstract slightly modified because of character limit
A Summary of the Havemor Project - Process Development of Shaped and Coloured Solar Cells for BIPV Applications
Creators: name: Devenport, S.
name: Roberts, S.
name: Bruton, T.M.
name: Heasman, K.
name: Brown, L.
name: Cole, A.
name: Baistow, I.
name: Webster, K.
name: Garrard, B.
Publisher: name: WIP-Munich
Year: 2009
Subjects: PV Systems
PV and Architecture

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 4276-4279
description: The use of photovoltaic modules in architectural applications is now firmly established and large
modules of glass-glass construction produced specifically for the BIPV market are available. In 1995 Mason et al [1]
investigated colour and efficiency of laser grooved buried contact (LGBC) solar cells as a function of the thickness of
the low pressure chemical vapour deposition (LPCVD) silicon nitride antireflective coating (ARC). In the late 1990’s
the BIMODE project produced coloured solar cells using this technique and modules of efficiencies in the range of
6.3% to 12.1% [2,3,4] were fabricated. The HAVEMOR project which started in 2007 is aimed at understanding and
controlling the processes that affect thickness and hence colour of the silicon nitride ARC to achieve maximum
colour uniformity and reproducibility, thereby raising manufacturing yields. This process optimization is focused on
allowing subsequent commercialization of coloured cells for use in the BIPV market. Initial theoretical background
and results of preliminary experiments were presented by Roberts et al [5] on the formation of ARC’s with
thicknesses in the range 90nm to 400nm on LGBC solar cells. In this paper, recent experimental results on coloured
multicrystalline LGBC cells will be reported, along with a study of the colour uniformity obtainable in large
production runs and an investigation into the use of different shaped cells to allow intricate module design.
Two-body dissipation effects on synthesis of superheavy elements
Creators: name: Tohyama, M.
name: Umar, S.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: To investigate the two-body dissipation effects on the synthesis of superheavy elements, we calculate low-energy collisions of the $N=50$ isotones ($^{82}$Ge, $^{84}$Se, $^{86}$Kr and $^{88}$Sr) on $^{208}$Pb using the time-dependent density-matrix theory (TDDM). TDDM is an extension of the time-dependent Hartree-Fock (TDHF) theory and can determine the time evolution of one-body and two-body density matrices. Thus TDDM describes both one-body and two-body dissipation of collective energies. It is shown that the two-body dissipation may increase fusion cross sections and enhance the synthesis of superheavy elements.
description: 5 pages, 2 figures
Hybrid online-flipped learning pedagogy for teaching laboratory courses to mitigate the pandemic COVID-19 confinement and enable effective sustainable delivery: investigation of attaining course learning outcome
Creators: name: Elkhatat, Ahmed M.
name: Al-Muhtaseb, Shaheen A.
Publisher: name: Manara - Qatar Research Repository
Year: 2022
Subjects: Education systems

description: Since the early spring of 2020, the coronavirus pandemic (COVID-19) outbreak has hindered traditional face-to-face teaching and hands-on, traditional delivery of laboratory courses, forcing universities to migrate from the traditional way of teaching to a remote online approach. Although few studies addressed the pandemic's impact on educational outcomes, no studies are found to investigate the impact of the remote online teaching approach on laboratory courses. This paper highlights the impact of the online teaching approach, coupled with flipped learning pedagogy, as a substitute for traditional laboratories. The course learning outcomes and assessment tools are analyzed and discussed for 46 students enrolled in the Unit Operations Laboratory course in the chemical engineering program at Qatar University. Results show that the course learning outcomes are achieved effectively using the hybrid online-flipped learning pedagogy, which can be considered for computerized traditional laboratories as a moderation solution to alleviate pandemic COVID-19 confinement on learning outcome. This methodology can also be sustained in the future to facilitate the teaching of such lab courses, even in normal conditions, to optimize the resources and avail the delivery of such courses to a larger audience who may have various obstacles to attending traditional lab courses.Other Information Published in: SN Social Sciences
 License: https://creativecommons.org/licenses/by/4.0
See article on publisher's website: http://dx.doi.org/10.1007/s43545-021-00117-6
Just Another Gibbs Additive Modeller: Interfacing JAGS and mgcv
Creators: name: Wood, Simon N
Publisher: name: arXiv
Year: 2016
Subjects: subject: Computation (stat.CO)
subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: The BUGS language offers a very flexible way of specifying complex statistical models for the purposes of Gibbs sampling, while its JAGS variant offers very convenient R integration via the rjags package. However, including smoothers in JAGS models can involve some quite tedious coding, especially for multivariate or adaptive smoothers. Further, if an additive smooth structure is required then some care is needed, in order to centre smooths appropriately, and to find appropriate starting values. R package mgcv implements a wide range of smoothers, all in a manner appropriate for inclusion in JAGS code, and automates centring and other smooth setup tasks. The purpose of this note is to describe an interface between mgcv and JAGS, based around an R function, `jagam', which takes a generalized additive model (GAM) as specified in mgcv and automatically generates the JAGS model code and data required for inference about the model via Gibbs sampling. Although the auto-generated JAGS code can be run as is, the expectation is that the user would wish to modify it in order to add complex stochastic model components readily specified in JAGS. A simple interface is also provided for visualisation and further inference about the estimated smooth components using standard mgcv functionality. The methods described here will be un-necessarily inefficient if all that is required is fully Bayesian inference about a standard GAM, rather than the full flexibility of JAGS. In that case the BayesX package would be more efficient.
description: Submitted to the Journal of Statistical Software
Dynamics and optimal control of Ebola transmission
Creators: name: Rachah, Amira
name: Torres, Delfim F. M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optimization and Control (math.OC)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Mathematics
subject: FOS: Biological sciences

description: A major Ebola outbreak occurs in West Africa since March 2014, being the deadliest epidemic in history. As an infectious disease epidemiology, Ebola is the most lethal and is moving faster than in previous outbreaks. On 8 August 2014, the World Health Organization (WHO) declared the outbreak a public health emergency of international concern. Last update on 7 July 2015 by WHO reports 27 609 cases of Ebola with a total of 11 261 deaths. In this work, we present a mathematical description of the spread of Ebola virus based on the SEIR (Susceptible-Exposed-Infective-Recovered) model and optimal strategies for Ebola control. In order to control the propagation of the virus and to predict the impact of vaccine programmes, we investigate several strategies of optimal control of the spread of Ebola: control infection by vaccination of susceptible; minimize exposed and infected; reduce Ebola infection by vaccination and education.
description: This is a preprint of a paper whose final and definite form will be published in 'Mathematics in Computer Science', Birkhauser Mathematics, Springer, ISSN 1661-8270 (print), ISSN 1661-8289 (electronic). Submitted 16-July-2015; Accepted, after a revision, 10-Mar-2016. arXiv admin note: substantial text overlap with arXiv:1512.03395
Clinical, biochemical, neuroradiological and molecular characterization of Egyptian patients with glutaric acidemia type 1
Creators: name: Zayed, Hatem
name: El Khayat, Hamed
name: Tomoum, Hoda
name: Khalifa, Ola
name: Siddiq, Ehab
name: Mohammad, Shaimaa A.
name: Gamal, Radwa
name: Shi, Zumin
name: Mosailhy, Ahmed
name: Zaki, Osama K.
Publisher: name: Manara - Qatar Research Repository
Year: 2022
Subjects: subject: Neurosciences
subject: FOS: Clinical medicine

description: Glutaric acidemia type 1 (GA1) is an inherited metabolic autosomal recessive disorder that is caused by a deficiency in glutaryl-CoA dehydrogenase (GCDH). Untreated patients suffer primarily from severe striatal damage. More than 250 variants in the GCDH gene have been reported with a variable frequency among different ethnic groups. In this study, we aimed to characterize 89 Egyptian patients with GA1 and identify the variants in the 41 patients who were available for genotyping. All of our patients demonstrated clinical, neuroradiological, and biochemical characteristics that are consistent with a diagnosis of GA1. All patients presented with variable degrees of developmental delay ranging from mild to severe. Most of the 89 patients presented with acute onset type (71.9%), followed by insidious (19%) and asymptomatic (9%). A delay in diagnosis was inversely associated with macrocephaly. The prevalence rate ratio (PR) for macrocephaly that was associated with each 6-month delay was 0.95 (95%CI 0.91–0.99). However, high body weight was associated with a higher likelihood of having macrocephaly (PR 1.16, 95%CI 1.06–1.26 per 1 SD increment of Z score weight). However, body weight was inversely associated with the morbidity score. Consanguinity level was 64% among our patient’s cohort and was positively associated with the C5DC level (β (95%CI) 1.06 (0.12–1.99)). Forty-one patients were available for genotyping and were sequenced for the GCDH gene. We identified a total of 25 variants, of which the following six novel variants were identified: three missense variants, c.320G > T (p.Gly107Val), c.481C > T (p.Arg161Trp) and c.572 T > G (p.Met191Arg); two deletions, c.78delG (p.Ala27Argfs34) and c.1035delG (p.Gly346Alafs*11); and one indel, c.272_331del (p.Val91_Lys111delinsGlu). All of the novel variants were absent in the 300 normal chromosomes. The most common variant, c.*165A > G, was detected in 42 alleles, and the most commonly detected missense variant, c.1204C > T (p.Arg402Trp), was identified in 29 mutated alleles in 15/41 (34.2%) of patients. Our findings suggest that GA1 is not uncommon organic acidemia disease in Egypt; therefore, there is a need for supporting neonatal screening programs in Egypt.Other Information Published in: Metabolic Brain Disease
 License: https://creativecommons.org/licenses/by/4.0
See article on publisher's website: http://dx.doi.org/10.1007/s11011-019-00422-3
Empagliflozin inhibits angiotensin II-induced hypertrophy in H9c2 cardiomyoblasts through inhibition of NHE1 expression
Creators: name: Abdulrahman, Nabeel
name: Ibrahim, Meram
name: Joseph, Jensa Mariam
name: Elkoubatry, Hanan Mahmoud
name: Al-Shamasi, Al-Anood
name: Rayan, Menatallah
name: Gadeau, Alain Pierre
name: Ahmed, Rashid
name: Eldassouki, Hussein
name: Hasan, Anwarul
name: Mraiche, Fatima
Publisher: name: Manara - Qatar Research Repository
Year: 2022
Subjects: Medical biochemistry and metabolomics
Biochemistry and cell biology

description: Diabetes mellitus (DM)-induced cardiac morbidities have been the leading cause of death among diabetic patients. Recently, sodium-glucose cotransporter-2 (SGLT-2) inhibitors including empagliflozin (EMPA), which have been approved for the treatment of DM, have gained attention for their cardioprotective effect. The mechanism by which SGLT-2 inhibitors exert their cardioprotective effect remains unclear. Recent studies have suggested that EMPA exerts its cardioprotective effect by inhibiting the Na+/H+ exchanger (NHE), a group of membrane proteins that regulate intracellular pH and cell volume. Increased activity and expression of NHE isoform 1 (NHE1), the predominant isoform expressed in the heart, leads to cardiac hypertrophy. p90 ribosomal s6 kinase (p90 RSK) has been demonstrated to stimulate NHE1 activity. In our study, H9c2 cardiomyoblasts were treated with angiotensin II (ANG) to activate NHE1 and generate a hypertrophic model. We aimed to understand whether EMPA reverses the ANG-induced hypertrophic response and to elucidate the molecular pathway contributing to the cardioprotective effect of EMPA. Our study demonstrated that ANG-induced hypertrophy of H9c2 cardiomyoblasts is accompanied with increased SGLT-1 and NHE1 protein expression, an effect which is prevented in the presence of EMPA. EMPA reduces ANG-induced hypertrophy through the inhibition of SGLT-1 and NHE1 expression.Other Information Published in: Molecular and Cellular Biochemistry
 License: https://creativecommons.org/licenses/by/4.0
See article on publisher's website: http://dx.doi.org/10.1007/s11010-022-04411-6
Local SDSS galaxies in the Herschel Stripe82 survey: A critical assessment of optically-derived star-formation rates
Creators: name: Rosario, D. J.
name: Mendel, J. T.
name: Ellison, S. L.
name: Lutz, D.
name: Trump, J. R.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We study a set of 3319 galaxies in the redshift interval 0.04 < z < 0.15 with far-infrared (FIR) coverage from the Herschel Stripe 82 survey (HerS), and emission-line measurements, redshifts, stellar masses and star-formation rates (SFRs) from the SDSS (DR7) MPA/JHU database. About 40% of the sample are detected in the Herschel/SPIRE 250 micron band. Total infrared (TIR) luminosities derived from HerS and ALLWISE photometry allow us to compare infrared and optical estimates of SFR with unprecedented statistics for diverse classes of galaxies. We find excellent agreement between TIR-derived and emission line-based SFRs for H II galaxies. Other classes, such as active galaxies and evolved galaxies, exhibit systematic discrepancies between optical and TIR SFRs. We demonstrate that these offsets are attributable primarily to survey biases and the large intrinsic uncertainties of the D4000- and colour-based optical calibrations used to estimate the SDSS SFRs of these galaxies. Using a classification scheme which expands upon popular emission-line methods, we demonstrate that emission-line galaxies with uncertain classifications include a population of massive, dusty, metal-rich star-forming systems that are frequently neglected in existing studies. We also study the capabilities of infrared selection of star-forming galaxies. FIR selection reveals a substantial population of galaxies dominated by cold dust which are missed by the long-wavelength WISE bands. Our results demonstrate that Herschel large-area surveys offer the means to construct large, relatively complete samples of local star-forming galaxies with accurate estimates of SFR that can be used to study the interplay between nuclear activity and star-formation.
description: 21 pages; 18 figures; Accepted for publication in MNRAS
Photon Emission from Pre-Breakdown Sites in Multicrystalline Silicon Solar Cells
Creators: name: Wagner, M.
name: Weber, 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; 1338-1341
description: Light emission under reverse bias has been observed in multicrystalline silicon solar cells. In contrast to electroluminescence (EL) under forward bias, the emission occurs at a large number of localized spots (prebreakdown sites), which are potentially dangerous as hot spots in modules. A correlation of these spots to oxygen precipitates is suggested and a new model is presented which may explain the experimental observations.
Perceptions and attitudes of Qatar University students regarding the utility of arabic and english in communication and education in Qatar
Creators: name: Mustafawi, Eiman
name: Shaaban, Kassim
name: Khwaileh, Tariq
name: Ata, Katsiaryna
Publisher: name: Manara - Qatar Research Repository
Year: 2022
Subjects: subject: Linguistics
subject: FOS: Languages and literature
subject: Sociology
subject: FOS: Sociology

description: This study investigates the linguistic attitudes and perceptions of Qatar University students regarding the utility and vitality of the two languages that define the education and communication scenes in Qatar, namely, Arabic and English. It also reports on the predictors of these attitudes in terms of demographic traits. 861 students completed a questionnaire that was divided into: Media Language Preference (MLP); Value and Symbolism of Arabic (VSA); Arabic in Education and Society (AES); Medium of Instruction (MOI); Impact of Al-Jazeera Network (IJN); English in Scientific and Professional Communication (ESPC); Qatari Cultural Identity (QCI); Arabic Books (AB); English in Society and Work (ESW); Language in Workplace (LIW); Arabic in Employment (AE); Status of Arabic (SA); and Manifestations of Sociocultural Identity (MSI). Results showed that Arabic got higher ratings for MLP, VSA, AES, MOI, QCI, and MSI, while English was perceived as more useful than Arabic in ESPC. Correlational analysis showed that Gender had significant correlations with MLP, MOI, ESPC, and MSI, while Nationality, Specialization, and Number of spoken languages had correlations with MLP and MOI.Other Information Published in: Language Policy
 License: https://creativecommons.org/licenses/by/4.0
See article on publisher's website: http://dx.doi.org/10.1007/s10993-021-09590-4
Laser Ablation of Passivating Barrier Layer Coated Silicon Using High Repetition Rate Femtosecond Pulses for Selective Emitter Formation
Creators: name: Juverdeanu, P.
name: Galdikas, A.
name: Melninkaitis, A.
name: Slekys, G.
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; 1397-1401
description: Selective emitter is an interesting approach presumptively leading to the efficiency increase of silicon solar cells. In this article, femtosecond laser ablation was used to remove locally the passivating layer for the subsequent selective emitter formation. Mainly the laser ablation can be applied in several techniques: one step emitter formation by diffusion of dopants through the passivating barrier layer and technologies that require few diffusion steps or etching back the highly doped emitter. Laser pulses of the femtosecond time scale were used in order to achieve better ablation performance and to induce less damage into underlying silicon layer. Ablation thresholds for various films suitable for silicon passivation have been determined. Results for both planar and textured silicon surfaces are compared. Furthermore, the characteristics of highly doped emitter after the laser ablation of passivating coating have been studied. Dependency of the charge carrier lifetime in the ablated zone as a function of pulse energy is discussed.
Improved Front Side Metallization by Aerosol Jet Printing of Hotmelt Inks
Creators: name: Hörteis, M.
name: Richter, P.
name: Glunz, S.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; 1402-1405
description: The rheology of a low viscous aerosol ink was modified into a hot melt ink by substituting the original solvent system by a thermo plastic alcohol. Additionally the aerosol printer was adapted to hot melt printing by heating all parts which are in contact with the ink, including the atomizer, virtual impactor, printing head and atomization gas. Front side contacts on silicon solar cells were printed with a metal aerosol jet printer using this hotmelt ink. Improved line resolution, higher aspect ratio and higher solid content compared to conventional aerosol inks could be achieved. To demonstrate the industrial feasibility, a multi-nozzle printing system was used. Line widths of 40 μm could be achieved. The aspect ratio of the fingers is increased from 1:40 to 1:6. Large-area multicrystalline silicon solar cells were, printed at room temperature at different printing speeds, fired in an in-line belt furnace and finally plated in an industrial plating machine. Energy conversion rates as high as 16.1% were achieved. The short-circuit current and the fill factor of these cells is around 34 mA/cm2 and 78%, respectively, showing the excellent contact geometry of the fabricated fingers.