cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
High-Efficiency n-Type Silicon Solar Cells with Front Side Boron Emitter
Creators: name: Benick, J.
name: Hoex, B.
name: Dingemans, G.
name: Kessels, W.M.M.
name: Richter, A.
name: Hermle, M.
name: Glunz, S.W.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Wafer-based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Materials and Cells

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 863-870
description: High-efficiency n-type PERL solar cells with a front side boron emitter passivated by ALD Al2O3 are
presented within this work. For the applied PERL cell design two variations have been employed: i) different boron
emitters (deep / shallow) and ii) different dielectric layers for rear side passivation (thermal grown SiO2 and PECVD
SiNx). Both, thermal grown SiO2 as well as PECVD SiNx provide an effective passivation of the n-type rear surface
with effective surface recombination velocities of 4 cm/s and 7 cm/s respectively. If the metalized rear side point
contacts (with BSF) together with the recombination of the 1 Ω cm FZ base silicon are taken into account this results
in saturation current densities of 30 fA/cm2 and 37 fA/cm2 respectively, limiting the open-circuit voltage (all
recombination losses due to the front side are neglected) to 717 mV and 712 mV. The passivation of the boron emitter
with ALD Al2O3 results in an emitter saturation current density as low as 11 fA/cm2. Together with the losses at the
rear side as well as the front side contacts this allows for an open-circuit voltage of the applied PERL solar cell design
of ~700 mV. For n-type PERL solar cells featuring a lowly doped boron emitter as well as a SiO2 passivated rear such
a high open-circuit voltage (up to 703.6 mV) could be reached also at the device level, resulting in a conversion
efficiency of 23.4%. Also for the PERL solar cells featuring a high surface concentration boron emitter with a
PECVD SiNx passivated rear, i.e. first steps towards an industrial structure, still a high conversion efficiency of 21.8%
could be achieved. All cells have been shown to be perfectly stable under illumination at 1 sun.
Training Next Generation AI Users & Developers at NCSA
Creators: name: Katz, Daniel S.
Publisher: name: Zenodo
Year: 2023

description: This invited talk for the IEEE HPEC 2023 conferences discusses NCSA as a part of the University of Illinois Urbana Champaign. It next talks about how we are working in the AI area, and then focuses on the Future of Discovery: Training Students to Build and Apply Open Source Machine Learning Models and Tools (FoDOMMaT) REU program.
Boron-Oxygen Defects in Compensated p-Type Czochralski Silicon
Creators: name: Macdonald, D.
name: Liu, A.
name: Rougieux, F.
name: Cuevas, A.
name: Lim, B.
name: Schmidt, J.
name: Di Sabatino, M.
name: Geerligs, L.J.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Wafer-based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Materials and Cells

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 877-882
description: The extent of formation of the well-known boron-oxygen defect has been measured in deliberately
compensated p-type Czochralski silicon. Both the defect concentration and the defect formation rate confirm recent
results showing that the amount of boron-oxygen defects formed is determined by the net doping p0=NA-ND, rather
than the total boron concentration NA. The presence of boron-phosphorus pairs has been postulated previously as a
possible explanation for this effect. However, we find that the existence of such pairs is not consistent with
measurements of the majority carrier mobility, and the crossover point of interstitial iron/iron-boron pairs in
compensated silicon. However, whatever the cause of the reduced impact of oxygen-boron defects in compensated
silicon, the implications for solar cells made with compensated feedstock are positive.
Innovative Diffusion Processes for Improved Efficiency on Industrial Solar Cells by Doping Profile Manipulation
Creators: name: Komatsu, Y.
name: Galbiati, G.
name: Lamers, M.
name: Venema, P.
name: Harris, M.
name: Stassen, A.F.
name: Meyer, C.
name: Van Den Donker, M.
name: Weeber, A.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Wafer-based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Materials and Cells

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 1063-1067
description: Manipulation of the doping profile of phosphorus emitters in silicon solar cells is demonstrated in an
industry-applicable process. By changing the diffusion temperature—time (T-t) curve without increasing process
time, the surface phosphorus concentration has been reduced resulting in an efficiency gain of 0.2% absolute. In
addition, batch quartz tube furnace with gaseous dopant source and inline conveyor furnace with liquid dopant source
were fairly compared by introducing an artificial process recipe with an identical T-t curve for each furnace. This
comparison shows that the open circuit voltage is independent of the diffusion furnace type. This suggests that
crucial factor regarding emitter quality is a lower process temperature and increased process time rather than
diffusion furnace choice.
Impact of the EVA Yellowing of 20 Commercial Modules on Performance and Durability
Creators: name: Coello, J.
name: López, C.
name: Cornacchia, F.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Components for PV Systems
PV Modules

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 3972-3975
description: This paper aims to analyze 20 photovoltaic modules randomly selected from 2 PV power plants where
high percentage of their modules presents “yellow” appearance. Modules were manufactured in two different
factories and all of them were subjected to five tests: visual inspection, insulation test, maximum power measurement,
cure degree of EVA (gel content) and adhesion strength test between EVA-glass and EVA-back-sheet interfaces,
respectively. During test, it was found out that visual discoloration was caused by EVA photodegradation in some
modules and by back-sheet photodegradation in others. Main conclusion observed from results is that discoloration
does not affect to electrical performance after one operation year. Also, results show that yellowing phenomenon has
not decreased adhesion properties in module components under commercial values. Moreover, direct relation
between discoloration and cure degree of EVA was not found.
INVESTIGATION OF BOND STRENGTH OF SMA BARS IN CONCRETE UNDER HIGH TEMPERATURE
Creators: name: PARAG TARACHAND MOON
Publisher: name: Monash University
Year: 2020
Subjects: subject: 90506 Structural Engineering
subject: FOS: Civil engineering

description: The structure’s fire resistance is determined by the period for fire resistance level (FRL) under specific fire conditions. In fire event the temperature can reach up to 900°C in just 60 mins. The main aim of this research was to understand the bond strength between SMA bar and concrete under room temperature and higher temperatures. It is believed that, this is the first experimental investigation of its kind for using SMA. In this study, SMA’s are investigated for their ability to gain strength at elevated temperatures. SMA’s can be trained to gain strength at such high temperatures.
Elementary constructions of non-discrete C*-simple groups
Creators: name: Suzuki, Yuhei
Publisher: name: arXiv
Year: 2016
Subjects: subject: Operator Algebras (math.OA)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 22D25, 46L05

description: Recently Raum has given the first examples of locally compact non-discrete groups with the simple reduced group C*-algebra, answering a question of de la Harpe. Here we construct such groups whose proof relies only on results in the discrete case.
description: 3 pages
Passivation of Screen-Printed Aluminium-Alloyed Emitters for Back Junction n-Type Silicon Solar Cells
Creators: name: Rauer, M.
name: Schmiga, C.
name: Hermle, M.
name: Glunz, S.W.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Wafer-based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Materials and Cells

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 1059-1062
description: We present a detailed study on effectively surface-passivated aluminium-doped p+ emitters to further
enhance the efficiency of our n-type silicon solar cells featuring a full-area screen-printed Al-alloyed rear emitter.
We investigated two different passivation layers both well suited for highly doped p+ silicon: plasma-enhancedchemical-
vapour-deposited amorphous silicon (a-Si) and atomic-layer-deposited aluminium oxide (Al2O3). We show
that for an effective emitter passivation (i) a careful preparation of the emitter surface and (ii) low emitter thicknesses
are essential. Combining these two aspects, we have achieved extraordinary high implied open-circuit voltages of
673 mV for a-Si- and 679 mV for Al2O3-passivated Al-alloyed emitters, corresponding to emitter saturation current
densities of 128 fA/cm2 and 89 fA/cm2, respectively.
Novel Strategies to Minimise Liquid Flow Channelling in Packed Bed Systems Pertaining to Industrial Heap Leaching
Creators: name: WEERAHENNEDIGE ASHANE MADUSHA FERNANDO
Publisher: name: Monash University
Year: 2020
Subjects: subject: 80106 Image Processing
subject: FOS: Computer and information sciences
subject: 49999 Earth Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 91403 Hydrometallurgy
subject: FOS: Environmental engineering
subject: 91404 Mineral Processing/Beneficiation

description: Heap leaching is a well-known hydrometallurgical technique, where the low-grade ores with a relatively coarse particle size are processed for valuable metal extraction. Heap leaching is economically favoured over the other established metal extraction techniques, as the associated capital costs are significantly lower. Although it delivers on the economic aspects, the metal extraction efficiencies are not entirely attractive thus, presents a wide scope for improvement. This drawback is primarily ascribed to the anomalous liquid distribution within the heap. Therefore, this work attempts to explore strategies to improve the liquid distribution within heaps, which eventually leads to an enhanced metal extraction.
Joint response to the Deloitte Review of the implementation of the recommendations of the Royal Commission into Aboriginal Deaths in Custody
Creators: name: Jordan, Kirrily
name: Anthony, Thalia
name: Walsh, Tamara
name: Markham, Francis
Publisher: name: Canberra, ACT : Centre for Aboriginal Economic Policy Research (CAEPR), The Australian National University
Year: 2019
Subjects: subject: Royal Commission into Aboriginal Deaths in Custody
subject: Self-determination
subject: Criminalisation
subject: Incarceration
subject: Indigenous Affairs
subject: Evaluation
subject: Aboriginal and Torres Strait Islander peoples

description: This statement outlines concerns with the 2018 Deloitte Access Economics review of the implementation of the recommendations of the Royal Commission into Aboriginal Deaths in Custody (RCIADIC). The statement is endorsed by 33 academic and professional experts in the policy areas examined by RCIADIC, including policy responses to Aboriginal deaths in custody. It suggests that the scope and methodology of the Deloitte review mean that it misrepresents governments’ responses to RCIADIC, and has the potential to misinform policy and practice responses to Aboriginal deaths in custody. It is also evidence of a more widespread problem in Indigenous Affairs policy-making in Australia. In particular, current approaches too often ignore the principles of self-determination and the realities of policy as experienced by Aboriginal and Torres Strait Islander peoples. The statement calls for the development of national independent monitoring of the implementation of the recommendations of RCIADIC, for the Federal Government to fully embrace and enact the intent of the RCIADIC recommendations, and for the Federal Government to provide a response to the Australian Law Reform Commission’s Inquiry on Indigenous Incarceration Rates (2017).
Policy implications of the Timber Creek decision
Creators: name: Dillon, Michael
Publisher: name: Canberra, ACT: Australian National University, Centre for Aboriginal Economic Policy Research (CAEPR)
Year: 2019
Subjects: subject: native title
subject: compensation
subject: Timber Creek
subject: Aboriginal and Torres Strait Islander peoples

description: The High Court decision in Northern Territory v Mr A Griffiths (deceased) and Lorraine Jones on behalf of the Ngaliwurru and Nungali peoples [2019] HCA 7 provides authoritative determination in relation to the approach to be adopted in valuing native title. In particular, it deals with how to value the compensation required to compensate native title holders when their title has been extinguished or impaired. This paper briefly summarises the core elements of the Court’s decision, and then focusses on the policy implications arising from the decision. The likely response of governments to the High Court decision is assessed, before progressing to a consideration of the issues raised which deserve further consideration by governments into the future.
Amplitude dependent orbital period in alternating gradient accelerators
Creators: name: Machida, S.
name: Kelliher, D. J.
name: Edmonds, C. S.
name: Kirkman, I. W.
name: Berg, J. S.
name: Jones, J. K.
name: Muratori, B. D.
name: Garland, J. M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: Orbital period in a ring accelerator and time of flight in a linear accelerator depend on the amplitude of betatron oscillations. The variation is negligible in ordinary particle accelerators with relatively small beam emittance. In an accelerator for large emittance beams like muons and unstable nuclei, however, this effect cannot be ignored. We measured orbital period in a linear non-scaling fixed field alternating gradient (FFAG) accelerator, which is a candidate for muon acceleration, and compared with the theoretical prediction. The good agreement between them gives important ground for the design of particle accelerators for a new generation of particle and nuclear physics experiments.
description: 9 pages, 3 figures
We all one mob but different: groups, grouping and identity in a Kimberley Aboriginal village
Creators: name: Moizo, Bernard
Publisher: name: The Australian National University
Year: 1991
Subjects: Aboriginal studies
ethnic identity
Kimberleys
Aboriginal community
government policy
social dynamic
land issues
remote settlement
outstation movement
cattle station
local governance
Aboriginal non-Aboriginal relationships

description: `This thesis examines the development and maintenance of a fragile group identity at the community level among Aboriginal people in the West Kimberley in Western Australia. It focuses on the town-based Aboriginal settlement of Junjuwa in Fitzroy Crossing. With no indigenous political structures relevant to the permanent co-residence of several hundreds of people the development and maintenance of a community sentiment powerful enough to allow the effective operation of the community as an administrative unit is problematic. While the material constraints of successive government policies have been a key limitation on people, indigenous identities, groupings and associations which pose obstacles to sustaining a commitment to the community are always present and constantly threatening it. This thesis explores the bases of cohesion at the community level and the constant tension with sub-community loyalties of one kind or another. It begins with a consideration of aspects of the historical background that are crucial to understanding the contemporary situation, paying particular attention to the transformations in residence patterns brought about by the pastoral industry. The emergence of Junjuwa is described in the context of the pastoral industry in the 1960s, which forced many Aboriginal people into Fitzroy Crossing. This is followed by an analysis of the community constitution, the physical structure and the resident population. In the subsequent Chapter, the bases of group sentiments and the circumstances in which these were expressed and operated are analysed. Chapters six and seven examine the sub-groupings, associations and identities that are in constant tension with the community identity. Chapter eight concentrates on the leadership in the community and Chapter nine on the consequences of external interventions. In the final chapter I discuss why the factors that make the emergence of a community sentiment at the level of associations like Junjuwa are not, at present, expendable to the regional level.
Melancholic attachments : the making and medicalisation of Aboriginal 'loss'
Creators: name: Adams, Christine
Publisher: name: The Australian National University
Year: 2005
Subjects: subject: DU124.S64A33 2005
subject: Aboriginal Australians Social life and customs
subject: Aboriginal Australians Social life and customs Australia Australian Capital Territory
subject: Aboriginal Australians Psychology

description: This thesis examines the loss of Aboriginal Australians as both an embodied experience and a powerful form of identity-construction. The focus of research is on southeast Australia where Aboriginal people, having suffered profound and often violent dispossession and state-authorised intrusion into their lives and communities, have been consistently defined in terms of their 'loss' of those qualities seen to constitute 'authentic' Aboriginality. I show how Aborigines have taken up and interacted with these dominant ascriptions of their identity such that the experience of loss has become a constitutive quality of Aboriginality in southern Australia, a pivotal basis of identification in public and political arenas. Further, I demonstrate how Aborigines' experience of loss has been reframed in dialectic with dominant forms of knowledge in changing socio-political milieux. In particular, I contend that in the last decades of the twentieth century, Aboriginal loss has been subsumed and redefined within the categories of psychology and psychiatry. I argue that this psychologisation of Aboriginal experience has significant ramifications in terms of how Aborigines are known and come to know themselves.
On the Price of Anarchy of Highly Congested Nonatomic Network Games
Creators: name: Colini-Baldeschi, Riccardo
name: Cominetti, Roberto
name: Scarsini, Marco
Publisher: name: arXiv
Year: 2016
Subjects: subject: Computer Science and Game Theory (cs.GT)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: 91A43, 91A13

description: We consider nonatomic network games with one source and one destination. We examine the asymptotic behavior of the price of anarchy as the inflow increases. In accordance with some empirical observations, we show that, under suitable conditions, the price of anarchy is asymptotic to one. We show with some counterexamples that this is not always the case. The counterexamples occur in very simple parallel graphs.
description: 26 pages, 6 figures
Meta Avatar Robot Cafe: Linking Physical and Virtual Cybernetic Avatars to Provide Physical Augmentation for People with Disabilities
Creators: name: Yamazaki, Yoichi
name: Yamada, Tsukuto
name: Nomura, Hiroki
name: Hosoda, Nobuaki
name: Kawamura, Ryoma
name: Takeuchi, Kazuaki
name: Kato, Hiroaki
name: Niiyama, Ryuma
name: Yoshifuji, Kentaro
Publisher: name: arXiv
Year: 2022
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Computers and Society (cs.CY)
subject: Graphics (cs.GR)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences
subject: I.2.9; K.4.2

description: Meta avatar robot cafe is a cafe that fuses cyberspace and physical space to create new encounters with people. We create a place where people with disabilities who have difficulty going out can freely switch between their physical bodies and virtual bodies, and communicate their presence and warmth to each other.
description: SIGGRAPH '22 Emerging Technologies, 2022, 2 Pages. Project page: https://bit.ly/metaavatarrobotcafe
Wafer-Based Crystalline Silicon Modules at 1€/Wp: Final Results from the CRYSTALCLEAR Integrated Project
Creators: name: Sinke, W.C.
name: Van Hooff, W.
name: Coletti, G.
name: Ehlen, B.
name: Hahn, G.
name: Reber, S.
name: John, J.
name: Beaucarne, G.
name: Van Kerschaver, E.
name: De Wild-Scholten, M.
name: Metz, A.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Wafer-based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Materials and Cells

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 845-856
description: CrystalClear was an EU co-financed Integrated Project aimed at developing technology for waferbased
silicon solar modules at 1 € per watt-peak manufacturing costs and a strongly improved environmental profile.
The project consortium has selected a number of technologies that potentially comply with these aims as well as
research that serves as basis for further developments (beyond the project aims). These technologies have been
demonstrated in the form of demonstrators, i.e. full-size modules featuring all innovations necessary to comply with
the aims. The project has shown that wafer-based multicrystalline-silicon solar modules can be produced at 1 € per
watt-peak at a world-record efficiency of 16% and an energy pay-back time of less than 2 years in Southern Europe.
Research on Photovoltaic Module Improvement Using Peltier Cells
Creators: name: Ramos Pérez, A.
name: Serrano-Casares, F.
name: Rodríguez García, E.A.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Components for PV Systems
PV Modules

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 4132-4138
description: This work studies whether Peltier cooling can be profitable in common photovoltaic modules. The goal is
to determine if the energy used to cool the module with Peltier cells is smaller or bigger than the difference of energy
produced by the photovoltaic module when it is cooled and when it is not.
Mathematical models and computer simulation have been used to carry out this research. There are no previous studies
written in this area and the operation conditions met in cooling conditions are far away from normal operation
conditions, thus all the models have been meticulously modified to assure they are suitable in a wide range of
conditions, particularly in those arisen in Peltier cooling.
The results of the simulations show that Peltier cooling now and with present technology is not profitable but it can be
profitable if some conditions are met, and the analysis of the results determines the direction to be taken. In global
terms this direction is characterized by high radiation. Peltier cooling can be very suitable for lowering down the cells
temperature thus increasing the power generated, but this can not be used indefinitely due to physical limitations.
H Effusion from a-Si:H/c-Si Heterojunctions for Solar Cell Back Contacts
Creators: name: Einsele, F.
name: Beyer, W.
name: Rau, U.
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; 1879-1883
description: We investigate H effusion of PECVD grown Si:H layer structures employed for the back contact of heterojunction Si solar cells. A thin intrinsic amorphous a-Si:H layer passivates the surface of the p-type c-Si wafer by saturating surface dangling bonds. A subsequent layer of boron-doped Si:H is required for the electrical back contact. Using a calibrated H effusion measurement setup, we obtain the H effusion rates in absolute values. For the intrinsic passiviation layer, we find the maximum of H effusion near 500 °C at a high absolute H concentration. The boron doped layers show a shift of the peak H effusion towards lower temperatures and significantly lower absolute H concentration attributed to the Fermi level dependence of H diffusion. Effusion spectra from layer stacks of undoped and doped films are presented and discussed in terms of an effective Fermi level shift in the undoped layer, caused by the overlying doped layer.
Comparing Luminescence Imaging with Illuminated Lock-In Thermography and Carrier Density Imaging for Inline Inspection of Silicon Solar Cells
Creators: name: Haunschild, J.
name: Glatthaar, M.
name: Kwapil, W.
name: Rein, S.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Wafer-based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Materials and Cells

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 857-862
description: Electroluminescence (EL) and Photoluminescence (PL) imaging have in recent years been gradually
improved and are now important measurement techniques for the characterization of silicon solar cells. The
contactless PL is applicable throughout the whole production process, including the characterization of as-cut wafers.
In this paper we will demonstrate the application of EL and PL as tools for quality control and compare it with
reference techniques like Illuminated Lock-in Thermography and Carrier Density Imaging. The focus of this paper is
on the characterization of multicrystalline silicon wafers on an inline-compatible timescale. We find that effective
lifetimes measured during processing do not scale with the open circuit voltage of the cell. PL images taken on as-cut
wafers already reveal defects from crystallization which limit the cell efficiency. In particular, crystal defects, e.g.
dislocations have a significant influence on the open circuit voltage of a solar cell. Thus, by recognizing these
features, an electric rating for the wafers can be done before production.
High Efficiency III-V Micro/Nano-Pillar Solar Cells: Bulk Devices & Growth on Metal Foils
Creators: name: Tsakalakos, L.
name: Balch, J.E.
name: Byun, A.T.
name: Elasser, A.
name: Fronheiser, J.A.
name: Kreutz, T.C.
name: Sulima, O.
name: Rawal, S.P.
name: Likar, J.J.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Advanced Photovoltaics: New Concepts and Ultra-high Efficiency
New Materials, Cells and Modules

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 274-279
description: III-V nanowires offer the potential to develop a low-cost, high efficiency (>20%) photovoltaic
technology with a flexible form factor. Here we demonstrate the basic operational principles of III-V elongated
micro- and nano-structured devices by first performing extensive modeling studies of GaAs nano/micro wire-based
solar cells. We show that the performance of these devices scales with pillar diameter and that within the modeled
regime the pillar length has a small effect on performance, though the pillar spacing (area fraction) has a more direct
impact on efficiency. We fabricated prototype single junction devices in bulk n and p-type <100> oriented GaAs
wafers by a combination of photolithography and dry etching, followed by epitaxial growth of conformal p-n
junctions with and without an AlGaAs passivation layer. The p-type pillar solar cells showed an improvement in
efficiency with pillar diameter (0.7-2 μm) with the best performing devices achieving an active-area power
conversion efficiency of ~11% (8.6% total-area efficiency, Voc = 781 mV, FF = 0.67), whereas planar control
samples showed an active-area efficiency of ~12.7% (~10% total area efficiency, Voc = 878 mV, FF = 0.75). N-type
device performance was found to be relatively independent of pillar diameter. External quantum efficiency data
showed evidence of improved carrier collection for charge carriers generated by sub-500 nm radiation. Finally,
preliminary results demonstrating growth of III-V nanowires by MOCVD on low-cost metal foil substrates are
presented.
Interactive learning tutorials on quantum mechanics
Creators: name: Singh, Chandralekha
Publisher: name: arXiv
Year: 2016
Subjects: subject: Physics Education (physics.ed-ph)
subject: FOS: Physical sciences

description: We discuss the development and evaluation of quantum interactive learning tutorials (QuILTs) which are suitable for undergraduate courses in quantum mechanics. QuILTs are based on the investigation of student difficulties in learning quantum physics. They exploit computer-based visualization tools and help students build links between the formal and conceptual aspects of quantum physics without compromising the technical content. They can be used both as supplements to lectures or as a self-study tool.
description: 6 pages, PACS: 01.40Fk,01.40.gb,01.40G-,1.30.Rr; Keywords: physics education research, quantum mechanics, teaching, learning, pedagogy, tutorial, active engagement'
M3: Scaling Up Machine Learning via Memory Mapping
Creators: name: Fang, Dezhi
name: Chau, Duen Horng
Publisher: name: arXiv
Year: 2016
Subjects: subject: Machine Learning (cs.LG)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: To process data that do not fit in RAM, conventional wisdom would suggest using distributed approaches. However, recent research has demonstrated virtual memory's strong potential in scaling up graph mining algorithms on a single machine. We propose to use a similar approach for general machine learning. We contribute: (1) our latest finding that memory mapping is also a feasible technique for scaling up general machine learning algorithms like logistic regression and k-means, when data fits in or exceeds RAM (we tested datasets up to 190GB); (2) an approach, called M3, that enables existing machine learning algorithms to work with out-of-core datasets through memory mapping, achieving a speed that is significantly faster than a 4-instance Spark cluster, and comparable to an 8-instance cluster.
description: 2 pages, 1 figure, 1 table
Accelerated Testing of Metal Foil Tape Joints and Their Effect on Photovoltaic Module Reliability
Creators: name: Sorensen, N.R.
name: Quintana, M.A.
name: Mundt, M.J.
name: Thomas, E.V.
name: Miller, S.P.
name: Lucero, S.J.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Components for PV Systems
PV Modules

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 3976-3980
description: A program is underway at Sandia National Laboratories to predict long-term reliability of photovoltaic
(PV) systems. The vehicle for the reliability predictions is a system performance model, currently being run under a
simulation software called GoldSim™. The model includes inputs for module performance, irradiance, and
degradation. In order to be truly predictive, physics-informed degradation processes and failure mechanisms need to
be included in the model. This paper describes accelerated life testing of metal foil tapes used in thin-film PV
modules, and how tape joint degradation, a possible failure mode, can be incorporated into the model.
3-D structures of planetary nebulae
Creators: name: Steffen, Wolfgang
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Recent advances in the 3-D reconstruction of planetary nebulae are reviewed. We include not only results for 3-D reconstructions, but also the current techniques in terms of general methods and software. In order to obtain more accurate reconstructions, we suggest to extend the widely used assumption of homologous nebula expansion to map spectroscopically measured velocity to position along the line of sight.
description: 8 pages, 3 figures, topical review accepted to appear in refereed proceedings of the 11th Pacific Rim Conference held in Hong-Kong in Dec 2015, Sun Kwok (editor)
Orbital and superorbital variability of LS I +61 303 at low radio frequencies with GMRT and LOFAR
Creators: name: Marcote, B.
name: Ribó, M.
name: Paredes, J. M.
name: Ishwara-Chandra, C. H.
name: Swinbank, J. D.
name: Broderick, J. W.
name: Markoff, S.
name: Fender, R.
name: Wijers, R. A. M. J.
name: Pooley, G. G.
name: Stewart, A. J.
name: Bell, M. E.
name: Breton, R. P.
name: Carbone, D.
name: Corbel, S.
name: Eislöffel, J.
name: Falcke, H.
name: Grießmeier, J. -M.
name: Kuniyoshi, M.
name: Pietka, M.
name: Rowlinson, A.
name: Serylak, M.
name: van der Horst, A. J.
name: van Leeuwen, J.
name: Wise, M. W.
name: Zarka, P.
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: LS I +61 303 is a gamma-ray binary that exhibits an outburst at GHz frequencies each orbital cycle of $\approx$ 26.5 d and a superorbital modulation with a period of $\approx$ 4.6 yr. We have performed a detailed study of the low-frequency radio emission of LS I +61 303 by analysing all the archival GMRT data at 150, 235 and 610 MHz, and conducting regular LOFAR observations within the Radio Sky Monitor (RSM) at 150 MHz. We have detected the source for the first time at 150 MHz, which is also the first detection of a gamma-ray binary at such a low frequency. We have obtained the light-curves of the source at 150, 235 and 610 MHz, all of them showing orbital modulation. The light-curves at 235 and 610 MHz also show the existence of superorbital variability. A comparison with contemporaneous 15-GHz data shows remarkable differences with these light-curves. At 15 GHz we see clear outbursts, whereas at low frequencies we see variability with wide maxima. The light-curve at 235 MHz seems to be anticorrelated with the one at 610 MHz, implying a shift of $\sim$ 0.5 orbital phases in the maxima. We model the shifts between the maxima at different frequencies as due to changes in the physical parameters of the emitting region assuming either free-free absorption or synchrotron self-absorption, obtaining expansion velocities for this region close to the stellar wind velocity with both mechanisms.
description: 12 pages, 10 figures, accepted for publication in MNRAS
Design and Analysis of High Efficiency Thin Film Si1-xGex Solar Cell in a Multi-Junction Solar Cell System
Creators: name: Wang, Y.
name: Lochtefeld, A.
name: Gerger, A.
name: Curtin, M.
name: Kerestes, C.
name: Opila, B.
name: Barnett, A.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Advanced Photovoltaics: New Concepts and Ultra-high Efficiency
New Materials, Cells and Modules

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 284-288
description: High Ge concentration Si:Ge solar cell based on a low cost Si substrate can be applied in multi-junction solar cell
system to absorb long wavelength light. From first principles an ideal Si:Ge solar cell with 90% Ge concentration can contribute
3.4% efficiency to a multi-junction solar cell system when placed below a 200um silicon solar cell under one sun. Under 50 suns,
for the same multi-junction solar cell system, the efficiency of bottom Si:Ge solar cell can contribute 5.1% with 361mV Voc. Our
initial experimental results of a Si:Ge solar cell of 92%Ge concentration with 5um Si:Ge absorber are presented and compared to
the model.
Social Network Extraction: Superficial Method and Information Retrieval
Creators: name: Nasution, Mahyuddin K. M.
name: Noah, Shahrul Azman Mohd.
name: Saad, Saidah
Publisher: name: arXiv
Year: 2016
Subjects: subject: Information Retrieval (cs.IR)
subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences
subject: F.2.2

description: Social network has become one of the themes of government issues, mainly dealing with the chaos. The use of web is steadily gaining ground in these issues. However, most of the web documents are unstructured and lack of semantic. In this paper we proposed an Information Retrieval driven method for dealing with heterogeneity of features in the web. The proposed solution is to compare some approaches have shown the capacity to extract social relation: strength relations and relations based on online academic database.
description: 11 pages, 1 figures
Change management: Implementation and benefits of the change control in the information technology enviroment
Creators: name: de Andrade, Paulo Roberto Martins
name: Albuquerque, Adriano B.
name: Teófilo, Wesklei Dourado
name: da Silva, Fátima Aguiar
Publisher: name: arXiv
Year: 2016
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences
subject: D.2.9; K.6.3; K.6.4; D.2.8

description: In the competitive environment, companies have given increasing importance to the IT sector and the resources it delivers as strategic. As a result, IT becomes a living being within the company. This sector is being subject to continuous changes in this scenario. These changes can occur within the own IT sector or whether IT to other sectors of the company. For both scenarios, it is important to have a good change control to avoid unnecessary trouble and expense. This paper aims to show through a case study, the benefits and results obtained with the implementation of a process of managing and controlling changes in the information technology environment of a large government company in Brazil.
description: 11 Pages, 4 figures in International Journal of Advanced Information Technology (IJAIT) Vol. 6, No. 1, February 2016
Alternative PV-Module Structure with Increased Optical Performances for PV-Thermal Applications
Creators: name: Dupeyrat, P.
name: Ménézo, C.
name: Wirth, H.
name: Haedrich, I.
name: Rommel, M.
name: Kwiatkowski, G.
name: Stryi-Hipp, G.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Components for PV Systems
PV Modules

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 4129-4131
description: Photovoltaic-thermal (PV-T) collectors are hybrid collectors converting solar energy into electricity
and usable heat at the same time. In this concept, PV modules are integrated as an absorber of a thermal collector. In
most of the cases, the hybrid collectors are made by the superposition of a PV module on the thermal absorber of a
solar collector. In this paper, another technique is presented. This technique combines the properties of each PV
module and solar thermal in order to adapt them to each other. An alternative PV cell lamination was developed with
increased optical and thermal performances. An increase of 2 mA/cm2 in terms of current density with our new
encapsulation method was obtained compared to a reference glass/EVA module encapsulation.
Process Characterisation of Picosecond Laser Ablation of SiO2 and SiNx Layers on Planar and Textured Surfaces
Creators: name: Hermann, S.
name: Neubert, T.
name: Wolpensinger, B.
name: Harder, N.P.
name: Brendel, R.
name: Massa, S.
name: Stute, U.
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; 1204-1208
description: Local contact openings in dielectric passivating layers of solar cells reduce recombination losses and offer an attractive alternative to “fire-through” processes such as screen printing of grid lines on the front side. Laser ablation with ultra short pulses is particularly suitable for contactless industrial processing of high-efficiency silicon solar cells. In the present paper, we investigate picosecond laser ablation of passivating SiO2 and SiNx layers on planar and textured silicon surfaces for various wavelengths of laser radiation. We characterise ps-laser ablated contact openings on 40 - 100 Ω/sq
emitters by lifetime and contact resistance measurements. Our results show that for infrared and for visible wavelengths the local emitter saturation current densities in laser treated areas are 1 to 4 pA/cm² when ablating SiNx and SiO2 layers from planar surfaces. However, ps-laser ablation on alkaline textured surfaces results in server crystal damage. Specific contact
resistance values of < 1 mΩcm² are achieved. We characterise the total recombination current densities by measurements of the J-V characteristics of laser treated diodes. Assuming 3% metallised area the efficiency loss compared to wet chemically treated solar cells is very low and amounts to 0.2% absolute.
Mitigating the "Iron Problem" in Crystalline Silicon Solar Cells
Creators: name: Hudelson, S.
name: Bernardis, S.
name: Lee, Y.S.
name: Hartman, K.
name: Bertoni, M.
name: Newman, B.
name: Marcus, M.A.
name: Lai, B.
name: Vogt, S.
name: Cai, Z.
name: Buonassisi, 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; 963-964
description: Iron impurities can have a severe negative impact on the electrical properties and performance of silicon solar cells [1]. Over the past decades, many techniques have been developed and used to study iron in multicrystalline silicon (mc-Si). Researchers have come to understand well the properties and detrimental effects of iron in its various forms, including iron point defects (interstitial iron and iron-acceptor pairs) [2], precipitates, and inclusions [3]. The current silicon feedstock shortage has today more than ever necessitated the transition from acquiring knowledge and understanding to applying this knowledge to both increase device efficiency using today’s feedstock, and also unlock the large potential of lower-grade silicon feedstock, including tops and tails of ingots and upgraded metallurgical grade silicon, which can contain large amounts of iron.

In this contribution, we demonstrate how it is possible to mitigate the deleterious impact of iron through manufacturable technologies and processes. By a systematic approach of defect engineering techniques from (a) ingot crystallization and solidification, through (b) phosphorus diffusion, to (c) post P-diffusion processing, we show how the detrimental effects of iron can be decreased and even eliminated, increasing device efficiencies and potentially enabling the use of lower-quality silicon feedstock.
Regarding the Radion in Randall-Sundrum Models with Brane Curvature
Creators: name: Dillon, Barry M.
name: George, Damien P.
name: McDonald, Kristian L.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In Randall-Sundrum models, one typically expects the radion to be the lightest new "gravity" state, as it is dual to a composite pseudo-Goldstone boson associated with conformal symmetry breaking in the IR. Here, we investigate the effects of localized brane curvature on the properties of the radion in Goldberger-Wise stabilized Randall-Sundrum models. We point out that both the radion mass and coupling to brane matter are sensitive to the brane curvature. Radion/Higgs kinetic mixing, via an IR-localized non-minimal coupling to the Higgs, is also investigated, in relation to the ghost-like radion that can occur for $\mathcal{O}(10)$ values of the IR curvature (as required to significantly suppress the first Kaluza-Klein graviton mass). We also discuss a class of speculative IR localized terms involving the radion. Basic comments regarding the dual 4D theory are offered.
description: 24 pages
Preservation of admissible rules when combining logics
Creators: name: Rasga, Joao
name: Sernadas, Cristina
name: Sernadas, Amilcar
Publisher: name: arXiv
Year: 2016
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 03B62, 03F03, 03B22

description: Admissible rules are shown to be conservatively preserved by the meet-combination of a wide class of logics. A basis is obtained for the resulting logic from bases given for the component logics. Structural completeness and decidability of the set of admissible rules are also shown to be preserved, the latter with no penalty on the time complexity. Examples are provided for the meet-combination of intermediate and modal logics.
Towards Low Cost, Efficient and Stable Organic Photovoltaic Modules
Creators: name: Andriessen, R.
name: Galagan, Y.
name: Rubingh, J.-E.
name: Grossiord, N.
name: Blom, P.
name: Kroon, J.M.
name: Veenstra, S.
name: Verhees, W.
name: Slooff, L.
name: Pex, P.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Advanced Photovoltaics: New Concepts and Ultra-high Efficiency
Organic-based PV

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 312-318
description: The presence of a transparent conductive electrode such as indium tin oxide (ITO) limits the reliability
and cost price of organic photovoltaic devices as it is brittle and expensive. Moreover, the relative high sheet
resistance of an ITO electrode on flexible substrates limits the maximum width of a single cell. Holst Centre and ECN
have developed an alternative ITO-free transparent anode, based on a solution processed high conductive and
transparent PEDOT:PSS layer in combination with a printed current collecting grid. Screen printed silver grids can
yield sheet resistances down to 1 Ohm/Sq with a surface coverage of only ca 5%. The efficiency of a flexible device
with an active area of 4 cm2 with such a grid is much higher than a similar device based on ITO. Furthermore, as this
composite anode is solution-processed, it is an important step forward towards low-cost large area processing.
Moreover, initial experiments indicate that the stability of ITO-free devices is higher than the stability of standard
devices based on ITO. This work will ultimately contribute toward fully printed devices, which will provide low-cost
manufacturing and improved stability of organic photovoltaic modules.