cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Short-term variability and mass loss in Be stars I. BRITE satellite photometry of $η$ and $μ$ Centauri
Creators: name: Baade, D.
name: Rivinius, Th.
name: Pigulski, A.
name: Carciofi, A. C.
name: Martayan, Ch.
name: Moffat, A. F. J.
name: Wade, G. A.
name: Weiss, W. W.
name: Grunhut, J.
name: Handler, G.
name: Kuschnig, R.
name: Mehner, A.
name: Pablo, H.
name: Popowicz, A.
name: Rucinski, S.
name: Whittaker, G.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Empirical evidence for the involvement of nonradial pulsations (NRP's) in the mass loss from Be stars ranges from (i) a singular case (\object{$μ$ Cen}) of repetitive mass ejections triggered by multi-mode beating to (ii) several photometric reports about enormous numbers of pulsation modes popping up during outbursts and on to (iii) effective single-mode pulsators. The BRITE Constellation of nanosatellites was used to obtain mmag photometry of the Be stars $η$ and \object{$μ$ Cen}. In the low-inclination star \object{$μ$ Cen}, light pollution by variable amounts of near-stellar matter prevented any new insights into the variability and other properties of the central star. In the equator-on star \object{$η$ Cen}, BRITE photometry and {\sc Heros} echelle spectroscopy from the 1990s reveal an intricate clockwork of star-disk interactions. The mass transfer is modulated with the frequency difference of two NRP modes and an amplitude three times as large as the amplitude sum of the two NRP modes. This process feeds a high-amplitude circumstellar activity running with the incoherent and slightly lower so-called Štefl frequency. The mass loss-modulation cycles are tightly coupled to variations in the value of the Štefl frequency and in its amplitude, albeit with strongly drifting phase differences. The observations are well described by the decomposition of the mass loss into a pulsation-related engine in the star and a viscosity-dominated engine in the circumstellar disk. Arguments are developed that large-scale gas-circulation flows occur at the interface. The propagation rates of these eddies manifest themselves as Štefl frequencies. Bursts in power spectra during mass-loss events can be understood as the noise inherent to these gas flows.
description: Recommended for publication in Astronomy & Astrophysics
Letter from Barbara Hepworth to Herbert Read, September 14, [1958?]
Creators: name: Hepworth, Barbara, 1903-1975
Publisher: name: University of Victoria Libraries
Year: 2022
Subjects: subject: Poets, English
valueUri: http://id.worldcat.org/fast/1067870
subject: Art movements
valueUri: http://id.worldcat.org/fast/815613
subject: Artists--Correspondence
valueUri: http://id.worldcat.org/fast/817571
subject: Poets
valueUri: http://id.worldcat.org/fast/1067778
subject: Women artists
valueUri: http://id.worldcat.org/fast/1177159
subject: Artists
valueUri: http://id.worldcat.org/fast/817559
subject: Art historians
valueUri: http://id.worldcat.org/fast/815554
subject: Hepworth, Barbara, 1903-1975
valueUri: http://id.worldcat.org/fast/1898202
subject: Authors
valueUri: http://id.worldcat.org/fast/821688
subject: Authors, English--Correspondence
valueUri: http://id.worldcat.org/fast/821953
subject: Read, Herbert, 1893-1968
valueUri: http://id.worldcat.org/fast/1754386
subject: Authors, English
valueUri: http://id.worldcat.org/fast/821945

description: Part of a collection of letters to Sir Herbert Read from Dame Barbara Hepworth (English artist and sculptor and, along with Read, a member of the modern art movement Unit One founded by Paul Nash), that span the time period of 1940 to 1965 and discuss their artistic and literary endeavors, philosophical and political views, and personal lives. Hepworth discusses one's ability to say "no".
Improved Layer Properties Combined with Light Soaking Enabling for 23% Efficient Silicon Heterojuction Solar Cells
Creators: name: Moldovan, A.
name: Pingel, S.
name: Roder, S.
name: Tutsch, L.
name: Fischer, A.
name: Georgiou-Sarlikiotis, V.
name: Vulcanean, I.V.
name: Wolke, W.
name: Bivour, M.
name: Wendel, A.
name: Hübner, S.
name: Dippell, T.
name: Wohlfart, P.
name: Nekarda, J.
name: Rentsch, J.
Publisher: name: WIP
Year: 2020
Subjects: Silicon Materials and Cells
Low Temperature Route for Si Cells

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 218-222
description: Silicon hetero junction (SHJ) cell technology is one of the next generation high efficiency concepts that are currently in the focus of the PV community enabling record efficiencies and increasing in market share. Continuous process improvements along the production chain enable efficiency as well as yield improvements targeting cost reduction and increased market acceptance. This work addresses process improvements in our PV-TEC pilot production environment concerning amorphous silicon (a-Si) and transparent conductive oxide (TCO) layer deposition, and specifically presents a laser-based light soaking treatment enabling cell efficiency gains up to 0.6%abs. All implemented improvements enable for 23% efficiency on full area (244.43 cm2 ) SHJ cells. Investigations concerning the impact of the TCO edge exclusion on cell parameters by designated area IV-measurements with varying mask widths indicate that for 3 mm edge exclusion carrier collection and recombination losses which strongly affect JSC and FF can be reduced enabling for efficiencies of 23.5%.
RISIS FirmReg - Objectives, Perimeter and Main Functionalities
Creators: name: Camerani, Roberto
name: Caldarola, Bernardo
name: Guerini, Massimiliano
Publisher: name: Zenodo
Year: 2020
Subjects: FirmReg

description: The objectives of the new release of FirmReg will be twofold. First, FirmReg will uniquely identify and integrate the businesses included in the datasets which are part of RISIS. Second, FirmReg aims at becoming a reference list for mapping the top performing European firms for their involvement in innovation activities.
Letter from Barbara Hepworth to Herbert Read, Monday, Tuesday [December 1946?]
Creators: name: Hepworth, Barbara, 1903-1975
Publisher: name: University of Victoria Libraries
Year: 2022
Subjects: subject: Artists
valueUri: http://id.worldcat.org/fast/817559
subject: Authors
valueUri: http://id.worldcat.org/fast/821688
subject: Art movements
valueUri: http://id.worldcat.org/fast/815613
subject: Authors, English
valueUri: http://id.worldcat.org/fast/821945
subject: Poets, English
valueUri: http://id.worldcat.org/fast/1067870
subject: Read, Herbert, 1893-1968
valueUri: http://id.worldcat.org/fast/1754386
subject: Authors, English--Correspondence
valueUri: http://id.worldcat.org/fast/821953
subject: Poets
valueUri: http://id.worldcat.org/fast/1067778
subject: Women artists
valueUri: http://id.worldcat.org/fast/1177159
subject: Hepworth, Barbara, 1903-1975
valueUri: http://id.worldcat.org/fast/1898202
subject: Artists--Correspondence
valueUri: http://id.worldcat.org/fast/817571
subject: Art historians
valueUri: http://id.worldcat.org/fast/815554

description: Part of a collection of letters to Sir Herbert Read from Dame Barbara Hepworth (English artist and sculptor and, along with Read, a member of the modern art movement Unit One founded by Paul Nash), that span the time period of 1940 to 1965 and discuss their artistic and literary endeavors, philosophical and political views, and personal lives. Hepworth criticizes Henry Moore's sculpture. Discusses art and Christianity.
Insights from Synthetic Star-forming Regions: I. Reliable Mock Observations from SPH Simulations
Creators: name: Koepferl, Christine M.
name: Robitaille, Thomas P.
name: Dale, James E.
name: Biscani, Francesco
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Through synthetic observations of a hydrodynamical simulation of an evolving star-forming region, we assess how the choice of observational techniques affects the measurements of properties which trace star formation. Testing and calibrating observational measurements requires synthetic observations which are as realistic as possible. In this part of the paper series (Paper I), we explore different techniques for how to map the distributions of densities and temperatures from the particle-based simulations onto a Voronoi mesh suitable for radiative transfer and consequently explore their accuracy. We further test different ways to set up the radiative transfer in order to produce realistic synthetic observations. We give a detailed description of all methods and ultimately recommend techniques. We have found that the flux around 20 microns is strongly overestimated when blindly coupling the dust radiative transfer temperature with the hydrodynamical gas temperature. We find that when instead assuming a constant background dust temperature in addition to the radiative transfer heating, the recovered flux is consistent with actual observations. We present around 5800 realistic synthetic observations for Spitzer and Herschel bands, at different evolutionary time-steps, distances and orientations. In the upcoming papers of this series (Paper II, Paper III and Paper IV), we will test and calibrate measurements of the star-formation rate (SFR), gas mass and the star-formation efficiency (SFE) using our realistic synthetic observations.
description: 17 figures; online data, 5800 synthetic observations (open source), algorithms to create realistic synthetic observations
The impulsive phase of magnetar giant flares: assessing linear tearing as the trigger mechanism
Creators: name: Elenbaas, Chris
name: Watts, Anna L.
name: Turolla, Roberto
name: Heyl, Jeremy
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Giant $γ$-ray flares comprise the most extreme radiation events observed from magnetars. Developing on (sub)millisecond timescales and generating vast amounts of energy within a fraction of a second, the initial phase of these extraordinary bursts present a significant challenge for candidate trigger mechanisms. Here we assess and critically analyse the linear growth of the relativistic tearing instability in a globally twisted magnetosphere as the trigger mechanism for giant $γ$-ray flares. Our main constraints are given by the observed emission timescales, the energy output of the giant flare spike, and inferred dipolar magnetic field strengths. We find that the minimum growth time of the linear mode is comparable to the $e$-folding rise time, i.e. $\sim10^{-1}$ ms. With this result we constrain basic geometric parameters of the current sheet. We also discuss the validity of the presumption that the $e$-folding emission timescale may be equated with the growth time of an MHD instability.
description: 15 pages, 4 figures, MNRAS in press
Firing-Through Metallisation of PERT-Like Cells Using μc-Si(n) as Thin Rear Side Full Area Passivating Contact
Creators: name: Wyss, P.
name: Jeangros, Q.
name: Diaz Leon, J.J.
name: Allebé, C.
name: Nicolay, S.
name: Haug, F.-J.
name: Ingenito, A.
name: Ballif, C.
Publisher: name: WIP
Year: 2020
Subjects: Silicon Materials and Cells
High Temperature Route for Si Cells

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 206-207
description: We present a firing-through metallisation approach for n-type passivating rear contacts that consist of a tunnelling oxide and an n-doped bilayer of a-SiOx and μc-Si. We find implied Voc up to 738 mV and contact resistivities as low as 20 mΩcm2. Implemented into 6-inch solar cells with a B-diffused emitter on the front, the best cell showed a Voc of 687 mV, FF 79.4 % and an overall efficiency of 22.2 %, proving the compatibility with metallisation by a conventional firing-through process. In view of the higher iVoc of the passivating μc-Si(n) contact, higher cell efficiencies are expected through improvements of the front side.
An Advanced Chemical Model for the Phosphorus Diffusion During Emitter Formation of Industrial Silicon Solar Cells
Creators: name: Jäger, P.
name: Mertens, V.
name: Baumann, U.
name: Dullweber, T.
Publisher: name: WIP
Year: 2020
Subjects: Silicon Materials and Cells
High Temperature Route for Si Cells

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 208-213
description: The POCl3 diffusion is the main technology to form a pn-junction in todays industrial silicon solar cells. Despite decades of research, the mechanism for the diffusion of phosphorus (P) into the silicon wafer is still not fully understood in particular for the so-called in-situ oxidation during drive-in and will be investigated in this paper. We systematically vary the drive-in times in O2 as well as the subsequent drive-in times in N2. During drive-in in O2, the emitter sheet resistance stays constant, showing that it is possible to completely suppress the diffusion of P into the Si wafer in O2 atmosphere. The thickness of the SiO2 layer dSiO2,O2 increases from 2 to 10 nm with longer drive-in time in O2. During subsequent drive-in in N2, the SiO2 thickness reaches an equilibrium thickness dSiO2,eq of around 5 nm. Only if dSiO2,O2 < dSiO2,eq, P diffuses into the wafer during drive-in in N2. If dSiO2,O2 > dSiO2,eq, no P diffuses into the wafer during drive-in in N2 proving that no O2 is needed to inhibit the P diffusion. Based on these new experimental results, we propose an advanced chemical model for the diffusion of phosphorus during drive-in, where the diffusion of Si from the wafer surface through the SiO2 layer to the PSG is the key mechanism for reducing P2O5 to SiO2 and “free” P thus enabling the diffusion of phosphorus into the Si wafer. If the Si is oxidized by O2 or if the Si diffusion is blocked by a too thick SiO2 interlayer, the phosphorus remains an P2O5 in the PSG and hence cannot diffuse into the Si wafer.
Letter from Barbara Hepworth to Herbert Read, May 14 [1944?]
Creators: name: Hepworth, Barbara, 1903-1975
Publisher: name: University of Victoria Libraries
Year: 2022
Subjects: subject: Read, Herbert, 1893-1968
valueUri: http://id.worldcat.org/fast/1754386
subject: Women artists
valueUri: http://id.worldcat.org/fast/1177159
subject: Art historians
valueUri: http://id.worldcat.org/fast/815554
subject: Authors, English
valueUri: http://id.worldcat.org/fast/821945
subject: Artists--Correspondence
valueUri: http://id.worldcat.org/fast/817571
subject: Artists
valueUri: http://id.worldcat.org/fast/817559
subject: Authors
valueUri: http://id.worldcat.org/fast/821688
subject: Poets, English
valueUri: http://id.worldcat.org/fast/1067870
subject: Art movements
valueUri: http://id.worldcat.org/fast/815613
subject: Authors, English--Correspondence
valueUri: http://id.worldcat.org/fast/821953
subject: Hepworth, Barbara, 1903-1975
valueUri: http://id.worldcat.org/fast/1898202
subject: Poets
valueUri: http://id.worldcat.org/fast/1067778

description: Part of a collection of letters to Sir Herbert Read from Dame Barbara Hepworth (English artist and sculptor and, along with Read, a member of the modern art movement Unit One founded by Paul Nash), that span the time period of 1940 to 1965 and discuss their artistic and literary endeavors, philosophical and political views, and personal lives. Hepworth compares Read's comments on constructive art and the machine and uses sculpture for her examples.
Letter from Barbara Hepworth to Herbert Read, [mid-June, 1962?]
Creators: name: Hepworth, Barbara, 1903-1975
Publisher: name: University of Victoria Libraries
Year: 2022
Subjects: subject: Authors, English--Correspondence
valueUri: http://id.worldcat.org/fast/821953
subject: Authors, English
valueUri: http://id.worldcat.org/fast/821945
subject: Art movements
valueUri: http://id.worldcat.org/fast/815613
subject: Hepworth, Barbara, 1903-1975
valueUri: http://id.worldcat.org/fast/1898202
subject: Art historians
valueUri: http://id.worldcat.org/fast/815554
subject: Read, Herbert, 1893-1968
valueUri: http://id.worldcat.org/fast/1754386
subject: Artists--Correspondence
valueUri: http://id.worldcat.org/fast/817571
subject: Artists
valueUri: http://id.worldcat.org/fast/817559
subject: Poets, English
valueUri: http://id.worldcat.org/fast/1067870
subject: Poets
valueUri: http://id.worldcat.org/fast/1067778
subject: Authors
valueUri: http://id.worldcat.org/fast/821688
subject: Women artists
valueUri: http://id.worldcat.org/fast/1177159

description: Part of a collection of letters to Sir Herbert Read from Dame Barbara Hepworth (English artist and sculptor and, along with Read, a member of the modern art movement Unit One founded by Paul Nash), that span the time period of 1940 to 1965 and discuss their artistic and literary endeavors, philosophical and political views, and personal lives. Hepworth is sending Read her new catalogue. Invites him to stay with her when he visits St. Ives to open Penwith (Gallery?).
Atmospheric Pressure Chemical Vapor Deposited Aluminum Oxide / Silicon Nitride Stacks for PERC and PERT Solar Cell Concepts with High Passivation Quality
Creators: name: Geml, F.
name: Gapp, B.
name: Sanz Alonso, S.
name: Engelhardt, J.
name: Hahn, G.
Publisher: name: WIP
Year: 2020
Subjects: Silicon Materials and Cells
High Temperature Route for Si Cells

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 198-200
description: PERC (Passivated Emitter and Rear Cell) cells based on p-type crystalline Si and PERT (Passivated Emitter, Rear Totally diffused) cells based on n-type crystalline Si are getting more and more attractive in the commercial solar cell market. As a result of the highly competitive market, a low-cost production reached by high through-put and low upkeep is necessary. Atmospheric chemical vapor deposition (APCVD) tools fulfill these requirements and provide necessary high layer quality for high-efficiency solar cell production. Aluminum oxide (AlOx) layers may in certain situations reach a surface passivation quality higher than atomic layer deposition (ALD) based AlOx layers. In this contribution we demonstrate excess minority charge carrier lifetime values eff up to 15 ms (surface recombination velocity S <0.3 cms-1) on n-type Czochralski-Si for undiffused samples as well as emitter saturation current density values j0e down to 21 fA/cm2 on a 65 Ω/sq p+ emitter for fired AlOx/SiNy:H stacks, common to PERC and PERT solar cell designs, respectively. We also determined the influence of reaction energy depending on heat delivery during APCV-deposition on the layer growth leading to a high temperature stable, low-pinhole density and blistering free layer (stack).
Optical control of charged exciton states in tungsten disulfide
Creators: name: Currie, M.
name: Hanbicki, A. T.
name: Kioseoglou, G.
name: Jonker, B. T.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A method is presented for optically preparing WS2 monolayers to luminesce from only the charged exciton (trion) state--completely suppressing the neutral exciton. When isolating the trion state, we observed changes in the Raman A1g intensity and an enhanced feature on the low energy side of the E12g peak. Photoluminescence and optical reflectivity measurements confirm the existence of the prepared trion state. This technique also prepares intermediate regimes with controlled luminescence amplitudes of the neutral and charged exciton. This effect is reversible by exposing the sample to air, indicating the change is mitigated by surface interactions with the ambient environment. This method provides a tool to modify optical emission energy and to isolate physical processes in this and other two-dimensional materials.
description: 13 pages, 4 Figures, 32 references
Letter from Edward Sackville-West to Herbert Read, [December 02?], 1946
Creators: name: Sackville-West, Edward, 1901-1965
Publisher: name: University of Victoria Libraries
Year: 2022
Subjects: subject: Read, Herbert, 1893-1968
valueUri: http://id.worldcat.org/fast/1754386
subject: Novelists, English
valueUri: http://id.worldcat.org/fast/1039718
subject: Sackville-West, Edward, 1901-1965
valueUri: http://id.worldcat.org/fast/4712
subject: Authors
valueUri: http://id.worldcat.org/fast/821688
subject: Modernism (Literature)
valueUri: http://id.worldcat.org/fast/1024455
subject: Authors, English
valueUri: http://id.worldcat.org/fast/821945
subject: Music critics
valueUri: http://id.worldcat.org/fast/1030524
subject: Politicians
valueUri: http://id.worldcat.org/fast/1069915
subject: Literature, Modern
valueUri: http://id.worldcat.org/fast/1000172

description: Correspondence between Herbert Read and Edward Sackville-West (the 5th Baron Sackville, novelist, music critic, and politician).
Simultaneous Boron Emitter Diffusion and Crystallization of TOPCon Layers via Rapid Vapour-Phase Direct Doping
Creators: name: Drießen, M.
name: Richter, A.
name: Steinhauser, B.
name: Feldmann, F.
name: Polzin, J.-I.
name: Sahajad, F.
name: Ohnemus, M.
name: Weiss, C.
name: Benick, J.
name: Janz, S.
Publisher: name: WIP
Year: 2020
Subjects: Silicon Materials and Cells
High Temperature Route for Si Cells

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 201-205
description: The alternative boron emitter diffusion process rapid vapour phase direct doping (B-RVD) is applied to n-type silicon wafers with tunnel oxide passivated contact (TOPCon) rear sides. A variation of the B-RVD process parameters led to an increase of the emitter depth and less pronounced increase of the surface concentration with increasing process temperature, time and B2H6 concentration. For the first time, a simultaneous crystallization of the phosphorus doped amorphous silicon a-Si(n) layer in the TOPCon layer during the B-RVD process is investigated. For this, the B-RVD process with the lowest tested process temperature of 900 °C and with the lowest determined emitter saturation current density J0e of 13 fA/cm2 and the highest bulk lifetime of > 6500 µs was chosen. The transformation of a-Si(n) to poly-Si within this combined process is demonstrated. Directly after the RVD process, TOPCon layers are already very well passivating the surfaces. An additional hydrogenation step leads to further improvement. On a solar cell precursor fabricated with simultaneous a-Si(n) crystallization on the rear side and BRVD emitter diffusion on the front side promising results with an iVOC of ≥ 700 mV and an implied fill factor (iFF) of 84.7 % were measured.
Optimal Prediction by Cellular Signaling Networks
Creators: name: Becker, Nils B.
name: Mugler, Andrew
name: Wolde, Pieter Rein ten
Publisher: name: arXiv
Year: 2015
Subjects: subject: Molecular Networks (q-bio.MN)
subject: Cell Behavior (q-bio.CB)
subject: FOS: Biological sciences

description: Living cells can enhance their fitness by anticipating environmental change. We study how accurately linear signaling networks in cells can predict future signals. We find that maximal predictive power results from a combination of input-noise suppression, linear extrapolation, and selective readout of correlated past signal values. Single-layer networks generate exponential response kernels, which suffice to predict Markovian signals optimally. Multilayer networks allow oscillatory kernels that can optimally predict non-Markovian signals. At low noise, these kernels exploit the signal derivative for extrapolation, while at high noise, they capitalize on signal values in the past that are strongly correlated with the future signal. We show how the common motifs of negative feedback and incoherent feed-forward can implement these optimal response functions. Simulations reveal that E. coli can reliably predict concentration changes for chemotaxis, and that the integration time of its response kernel arises from a trade-off between rapid response and noise suppression.
description: 5 pages, 4 figures; 15 supplementary pages with 12 figures
Letter from Leo Myers to Herbert Read, [1941?]
Creators: name: Myers, L. H. (Leopold Hamilton), 1881-1944
Publisher: name: University of Victoria Libraries
Year: 2023
Subjects: subject: Poets
valueUri: http://id.worldcat.org/fast/1067778
subject: Read, Herbert, 1893-1968
valueUri: http://id.worldcat.org/fast/1754386
subject: Novelists, English
valueUri: http://id.worldcat.org/fast/1039718
subject: Anarchists
valueUri: http://id.worldcat.org/fast/808401
subject: Myers, L. H. (Leopold Hamilton), 1881-1944
valueUri: http://id.worldcat.org/fast/149242
subject: Authors, English
valueUri: http://id.worldcat.org/fast/821945
subject: Authors
valueUri: http://id.worldcat.org/fast/821688
subject: Novelists
valueUri: http://id.worldcat.org/fast/1039684
subject: Poetry
valueUri: http://id.worldcat.org/fast/1423828
subject: Poets, English
valueUri: http://id.worldcat.org/fast/1067870
subject: Art historians
valueUri: http://id.worldcat.org/fast/815554

description: Part of a collection of letters from British novelist Leo Myers to Sir Herbert Read. The letters primarily discuss the writing and reception of poetry. In this letter, Myers writes of buying up all the remaining copies he can find of a book, and of a difference of opinion with Graham Greene.
REGIONAL VALUE CHAINS IN COMESA: OPPORTUNITIES FOR PROCUREMENT OPTIMIZATION
Creators: name: Mbonigaba Celestin*, A. Dinesh Kumar** & M. Vasuki***
Publisher: name: Zenodo
Year: 2024

description: This study explores opportunities for optimizing procurement within the Common Market for Eastern and Southern Africa (COMESA) by enhancing Regional Value Chains (RVCs). COMESA, with 21 member states, aims to strengthen regional integration and economic growth, but current procurement practices face challenges such as inefficiencies, high costs, and logistical barriers, limiting the region's economic potential. The research identifies key opportunities for improvement, including the adoption of electronic procurement systems to streamline processes, reduce costs, and increase transparency. Collaborative procurement initiatives among member states offer further potential for cost savings and supply chain efficiency by leveraging collective purchasing power. Policy and regulatory improvements are also recommended to harmonize procurement practices across the region, reducing inconsistencies and enhancing cross-border trade. Case studies highlight both successes and challenges in the region's procurement strategies. Zambia's implementation of an electronic procurement system successfully reduced cycle times and costs, whereas Kenya's reliance on direct procurement in infrastructure projects resulted in budget overruns and delays. These examples underscore the importance of adopting best practices and learning from regional experiences. Lessons from other regional blocs, such as the European Union and ASEAN, demonstrate the benefits of integrated supply chains through standardized procedures and shared technologies. Applying similar strategies could significantly enhance procurement processes within COMESA. The study concludes with strategic recommendations for optimizing procurement in COMESA, including enhancing data sharing, building procurement capacity, integrating sustainability initiatives, and establishing robust monitoring and evaluation frameworks. These recommendations aim to improve procurement efficiency, reduce costs, and strengthen regional integration and economic competitiveness. Overall, the findings highlight the significant potential of procurement optimization to drive economic growth and development in COMESA.
Firing Stability of Doped Polysilicon Passivation Layers
Creators: name: Kang, D.
name: Sio, H.C.
name: Yan, D.
name: Stuckelberger, J.
name: Liu, R.
name: Macdonald, D.
Publisher: name: WIP
Year: 2020
Subjects: Silicon Materials and Cells
High Temperature Route for Si Cells

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 188-192
description: We investigate the impact of firing treatment on n-type silicon samples passivated by n+ and p+ polysilicon (polySi)/SiOx structures, and explore the root causes for the degradation of surface passivation quality after firing. Lifetime samples and industrially fabricated solar cell precursors both show stable surface passivation qualities upon firing at temperatures from 600 to 750, but they exhibit a significant loss of surface passivation quality when the peak firing temperature reaches 800. The degradation phenomena cannot be attributed to changes of the crystal structure in the polySi films, as indicated by Grazing Incidence X-ray Diffraction (GIXRD) results. It is found that the dielectric coating layer plays a significant role in the performance of the polySi passivation layers after firing. The hydrogen profiles measured by Secondary Ion Mass Spectrometry (SIMS) suggest that the impact of firing on n+ polySi passivation layers could be related to changes of the hydrogen concentration in the polySi/SiOx/c-Si structure. Surprisingly, it is observed that the surface passivation quality does not monotonically increase with the hydrogen content in the polySi layers. In contrast to n+ polySi, the p+ polySi passivated samples were found to have better thermal stability, with slightly improved recombination current density parameter (J0) after firing. We have also found a possible correlation between the firing stability of polySi layers and their long-term stability upon extended light soaking.
Comparison of LeTID in Monofacial and Bifacial Multi-Crystalline PERC Cells and Modules
Creators: name: Zhang, D.
name: Wan, B.
name: Yan, G.
name: Wu, J.
name: Jaubert, J.-N.
name: Jiang, F.
Publisher: name: WIP
Year: 2020
Subjects: Silicon Materials and Cells
High Temperature Route for Si Cells

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 193-197
description: Upgrading the production lines from monofacial to bifacial cells largely improves the output power of the downstream modules. Several processes involved in the upgrade may lead to difference in the anti-LeTID performance of the cells and modules. In this work, we focus on the difference in LeTID of bifacial and monofacial multi crystalline cells and modules. From minority carrier lifetime test, we demonstrate that bifacial cell precursors show less degradation than monofacial ones, which is confirmed on various degradation conditions and different batches of wafers. The less LeTID in bifacial samples shows a positive correlation with less amount of hydrogen introduced from the rear SiNx:H layers into the bulk, due to the thinner SiNx:H layers than monofacial ones. Regarding on cells and modules level, bifacial products exhibit comparable degradation initially, but less degradation in the long time, which is proposed to be a combined effect from degradation at the rear Ag region and bulk LeTID. The outdoor test at Canadian Solar Inc. (CSI) demonstrate that modules from the bifacial cells have ~0.3% Pmax degradation in average after >50 kWh/m2 irradiance, which is ~0.7% less than monofacial cell modules.
Plating on TOPCon as a Way to Reduce the Fabrication Costs of i-TOPCon Solar Cells
Creators: name: Steinhauser, B.
name: Grübel, B.
name: Nold, S.
name: Arya, V.
name: Schmiga, C.
name: Kluska, S.
name: Brand, A.A.
name: Feldmann, F.
name: Bay, N.
name: Gay, X.
name: Passig, M.
name: Glatthaar, M.
Publisher: name: WIP
Year: 2020
Subjects: Silicon Materials and Cells
High Temperature Route for Si Cells

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 179-183
description: i-TOPCon solar cells commonly make use of a TOPCon/SiNx stack at the rear side. For screen-printed contacts, a certain TOPCon layer thickness in the range of 110 to 150 nm is usually required to prevent spiking of the contacts. In this publication, it is shown that laser contact opening can be used in a thickness range of 60 to 90 nm with a J0,met of around 50 fA/cm2 for a thickness of 90 nm. The J0,met of over 1000 fA/cm2 for the screen-printed references indicates that in this thickness range screen-printing is not a viable technology with state-of-the-art pastes. However, the reduction in the TOPCon thickness can give a significant advantage in the cost of ownership for the TOPCon deposition due to the reduced deposition time. The variation of the TOPCon thickness is investigated on solar cells as well proving again that screen-printing on less than 100 nm thick TOPCon layers should be avoided. On the other hand, laser contact opening in combination with plated contacts is shown to work well reaching an efficiency of 22 % limited by the front side emitter passivation and contact.
Practical Quantum Retrieval Games
Creators: name: Arrazola, Juan Miguel
name: Karasamanis, Markos
name: Lütkenhaus, Norbert
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Complex cryptographic protocols are often constructed from simpler building-blocks. In order to advance quantum cryptography, it is important to study practical building-blocks that can be used to develop new protocols. An example is quantum retrieval games (QRGs), which have broad applicability and have already been used to construct quantum money schemes. In this work, we introduce a general construction of quantum retrieval games based on the hidden matching problem and show how they can be implemented in practice using available technology. More precisely, we provide a general method to construct (1-out-of-k) QRGs, proving that their cheating probabilities decrease exponentially in $k$. In particular, we define new QRGs based on coherent states of light, which can be implemented even in the presence of experimental imperfections. Our results constitute a new tool in the arsenal of the practical quantum cryptographer.
description: 10 pages, 11 figures
Joint Time-Frequency Scattering for Audio Classification
Creators: name: Andén, Joakim
name: Lostanlen, Vincent
name: Mallat, Stéphane
Publisher: name: arXiv
Year: 2015
Subjects: subject: Sound (cs.SD)
subject: FOS: Computer and information sciences

description: We introduce the joint time-frequency scattering transform, a time shift invariant descriptor of time-frequency structure for audio classification. It is obtained by applying a two-dimensional wavelet transform in time and log-frequency to a time-frequency wavelet scalogram. We show that this descriptor successfully characterizes complex time-frequency phenomena such as time-varying filters and frequency modulated excitations. State-of-the-art results are achieved for signal reconstruction and phone segment classification on the TIMIT dataset.
description: 6 pages, 2 figures in IEEE 25th International Workshop on Machine Learning for Signal Processing (MLSP), 2015. Sept. 17-20. Boston, USA
Fired-Only Passivating Poly-Si on Oxide Contacts with DC-Sputtered In-Situ Phosphorous-Doped Silicon Layers
Creators: name: David, L.
name: Hübner, S.
name: Min, B.
name: Hollemann, C.
name: Dippell, T.
name: Wohlfart, P.
name: Peibst, R.
name: Brendel, R.
Publisher: name: WIP
Year: 2020
Subjects: Silicon Materials and Cells
High Temperature Route for Si Cells

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 184-187
description: We demonstrate poly-Si-based electron-collecting passivating contacts realized with physical vapor deposition by sputtering. The junction formation and the dopant activation are done with a conventional belt furnace instead of a tube furnace to reduce the processing time. We use symmetric lifetime samples to investigate the impact of the deposition pressure and the peak firing temperature on the implied open circuit voltage. We determine the dopant activation from secondary ion-mass spectrometry measurements and electrochemical voltage capacitance measurements and relate the activation to the passivation quality. The highest implied open circuit voltage that we achieve is 695 mV with a median of 680 mV.
Computer-automated tuning of semiconductor double quantum dots into the single-electron regime
Creators: name: Baart, T. A.
name: Eendebak, P. T.
name: Reichl, C.
name: Wegscheider, W.
name: Vandersypen, L. M. K.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report the computer-automated tuning of gate-defined semiconductor double quantum dots in GaAs heterostructures. We benchmark the algorithm by creating three double quantum dots inside a linear array of four quantum dots. The algorithm sets the correct gate voltages for all the gates to tune the double quantum dots into the single-electron regime. The algorithm only requires (1) prior knowledge of the gate design and (2) the pinch-off value of the single gate $T$ that is shared by all the quantum dots. This work significantly alleviates the user effort required to tune multiple quantum dot devices.
Higgs Starobinsky Inflation
Creators: name: Calmet, Xavier
name: Kuntz, Iberê
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper we point out that Starobinky inflation could be induced by quantum effects due to a large non-minimal coupling of the Higgs boson to the Ricci scalar. The Higgs Starobinsky mechanism provides a solution to issues attached to large Higgs field values in the early universe which in a metastable universe would not be a viable option. We verify explicitly that these large quantum corrections do not destabilize Starobinsky's potential.
POLO Back Junction: An Elegant Way to Implement Electron-Collecting Passivating Contacts in p-Type Industrial Silicon Solar Cells
Creators: name: Min, B.
name: Merkle, A.
name: Brendemühl, T.
name: Wehmeier, N.
name: Larionova, Y.
name: Beier, B.
name: David, L.
name: Schulte-Huxel, H.
name: Dullweber, T.
name: Peibst, R.
name: Brendel, R.
Publisher: name: WIP
Year: 2020
Subjects: Silicon Materials and Cells
High Temperature Route for Si Cells

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 170-172
description: We demonstrate the fabrication of screen-printed p-type back junction solar cells with an aluminum front grid and a poly-Si on oxide electron-collecting passivating contact at the rear side. The high potential of this cell concept is demonstrated with an implied open-circuit voltage of 730 mV and an implied filled factor of 85.5 %, measured on a cell precursor. The best cell from a batch of 7 cells has an open-circuit voltage of 695.6 mV and an efficiency of 22.3 %, independently confirmed by ISFH CalTeC.
Gate-tunable spin-charge conversion and a role of spin-orbit interaction in graphene
Creators: name: Dushenko, S.
name: Ago, H.
name: Kawahara, K.
name: Tsuda, T.
name: Kuwabata, S.
name: Takenobu, T.
name: Shinjo, T.
name: Ando, Y.
name: Shiraishi, M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The small spin-orbit interaction of carbon atoms in graphene promises a long spin diffusion length and potential to create a spin field-effect transistor. However, for this reason, graphene was largely overlooked as a possible spin-charge conversion material. We report electric gate tuning of the spin-charge conversion voltage signal in a single-layer graphene. Using spin pumping from yttrium iron garnet ferrimagnetic insulator and ionic liquid top gate we determined that the inverse spin Hall effect is the dominant spin-charge conversion mechanism in a single-layer graphene. From the gate dependence of the electromotive force we showed dominance of the intrinsic over Rashba spin-orbit interaction: a long-standing question in graphene research.
description: 13 pages, 5 figures (to appear in Phys. Rev. Lett.)
House for Shelan Administrative Services Ltd. [Project: 108-01-69/231-03-76]
Creators: name: Levinson, Benjamin B. (Benjamin Bryce), 1942-
name: Hodgson, Alan J. (Alan James)
Publisher: name: University of Victoria Libraries
Year: 2022
Subjects: subject: Architecture
valueUri: http://id.worldcat.org/fast/813346
subject: FOS: Civil engineering
subject: Modern movement (Architecture)
valueUri: http://id.worldcat.org/fast/1024437
subject: Architects
valueUri: http://id.worldcat.org/fast/813114
subject: Architecture, Modern
valueUri: http://id.worldcat.org/fast/813842
subject: Architecture, Domestic
valueUri: http://id.worldcat.org/fast/813666

description: Project material consists of two large folders of architectural drawings and other material pertaining to the design of a house for Shelan Administrative Services Ltd., located at 307 Henry Street in Victoria, B.C. The residence was originally designed to be a duplex prior to being changed to a single-family home at later stages of the design process. Included are site plans; floor plans; foundation plans; elevations; section drawings; detail drawings; electrical plans; perspective drawings; notes; sketches; and other material produced at various stages of the design process.
Log the Stein???? Log Stanley Park???? Make Lost Lagoon a Mill Pond???? Ignore 9,000 Years of Indian Habitation????
Creators: name: Pritchett, David L.
Publisher: name: University of Victoria Libraries
Year: 2020
Subjects: subject: Anarchists
valueUri: http://id.worldcat.org/fast/808401
subject: Forests and forestry
valueUri: http://id.worldcat.org/fast/932632
subject: Forest protection
valueUri: http://id.worldcat.org/fast/932432
subject: Anarchism
valueUri: http://id.worldcat.org/fast/808387
subject: Social groups
valueUri: http://id.worldcat.org/fast/1122482
subject: Poetry
valueUri: http://id.worldcat.org/fast/1423828
subject: Logging
valueUri: http://id.worldcat.org/fast/1001952
subject: Political participation
valueUri: http://id.worldcat.org/fast/1069386
subject: Environmentalism
valueUri: http://id.worldcat.org/fast/913543
subject: Anarchism--Societies, etc.
valueUri: http://id.worldcat.org/fast/808396
subject: Forest conservation
valueUri: http://id.worldcat.org/fast/932069

description: Outlines the author's concerns about needing to protect the natural world, issues with land use management in the Stein River Valley and Stanley Park in British Columbia, the problems with logging and how this all intersects with indigenous peoples. Includes several different poems.
Doping and Hydrogenation Processes for Passivating Contact Solar Cells Using Plasma Immersion Ion Implantation (PIII)
Creators: name: Desrues, T.
name: Oliveau, C.
name: Seron, C.
name: Borvon, G.
name: Torregrosa, F.
name: Rafhay, Q.
name: Kaminski-Cachopo, A.
name: Dubois, S.
Publisher: name: WIP
Year: 2020
Subjects: Silicon Materials and Cells
High Temperature Route for Si Cells

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 173-175
description: This study deals with innovative fabrication processes for polysilicon on oxide (poly-Si/SiOx) based passivated contacts solar cells. For such high efficiency devices, the controlled insertion of impurities such as dopants and hydrogen in c-Si and thin active layers is indeed a key challenge. Plasma Immersion Ion Implantation (PIII) technology provides various opportunities for this purpose while offering an economically efficient alternative. We have therefore applied this technique for the simplified fabrication of passivating contacts solar cells featuring poly-Si/SiOx and Transparent Conductive Oxide (TCO) layers on both sides. Using 15nm-thick poly-Si layers doped by PIII technique, large area solar cells (244.2 cm2) with an average efficiency of 21.5% have been fabricated. Moreover, different hydrogenation processes have been tested to further improve the passivating properties of such structures.
On Capacity and Delay of Multi-channel Wireless Networks with Infrastructure Support
Creators: name: Dai, Hong-Ning
name: Wong, Raymond Chi-Wing
name: Wang, Hao
Publisher: name: arXiv
Year: 2016
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: In this paper, we propose a novel multi-channel network with infrastructure support, called an MC-IS network, which has not been studied in the literature. To the best of our knowledge, we are the first to study such an MC-IS network. Our proposed MC-IS network has a number of advantages over three existing conventional networks, namely a single-channel wireless ad hoc network (called an SC-AH network), a multi-channel wireless ad hoc network (called an MC-AH network) and a single-channel network with infrastructure support (called an SC-IS network). In particular, the network capacity of our proposed MC-IS network is $\sqrt{n \log n}$ times higher than that of an SC-AH network and an MC-AH network and the same as that of an SC-IS network, where $n$ is the number of nodes in the network. The average delay of our MC-IS network is $\sqrt{\log n/n}$ times lower than that of an SC-AH network and an MC-AH network, and $\min\{C_I,m\}$ times lower than the average delay of an SC-IS network, where $C_I$ and $m$ denote the number of channels dedicated for infrastructure communications and the number of interfaces mounted at each infrastructure node, respectively. Our analysis on an MC-IS network equipped with omni-directional antennas only has been extended to an MC-IS network equipped with directional antennas only, which are named as an MC-IS-DA network. We show that an MC-IS-DA network has an even lower delay of $\frac{c}{\lfloor \frac{2π}θ\rfloor \cdot C_I}$ compared with an SC-IS network and our MC-IS network. For example, when $C_I=12$ and $θ=\fracπ{12}$, an MC-IS-DA network can further reduce the delay by 24 times lower that of an MC-IS network and reduce the delay by 288 times lower than that of an SC-IS network.
description: accepted, IEEE Transactions on Vehicular Technology, 2016
Letter from Kathleen Raine to Herbert Read, July 01, [1949?-1965?]
Creators: name: Raine, Kathleen, 1908-2003
Publisher: name: University of Victoria Libraries
Year: 2023
Subjects: subject: Poets
valueUri: http://id.worldcat.org/fast/1067778
subject: Literature, Modern
valueUri: http://id.worldcat.org/fast/1000172
subject: Authors, English
valueUri: http://id.worldcat.org/fast/821945
subject: Raine, Kathleen, 1908-2003
valueUri: http://id.worldcat.org/fast/52672
subject: Philosophers, Modern
valueUri: http://id.worldcat.org/fast/1060765
subject: Authors, English--Correspondence
valueUri: http://id.worldcat.org/fast/821953
subject: Anarchists
valueUri: http://id.worldcat.org/fast/808401
subject: Art historians
valueUri: http://id.worldcat.org/fast/815554
subject: Critics
valueUri: http://id.worldcat.org/fast/883769
subject: Scholars
valueUri: http://id.worldcat.org/fast/1106878
subject: Modernism (Literature)
valueUri: http://id.worldcat.org/fast/1024455
subject: Read, Herbert, 1893-1968
valueUri: http://id.worldcat.org/fast/1754386
subject: Philosophers
valueUri: http://id.worldcat.org/fast/1060746
subject: Authors
valueUri: http://id.worldcat.org/fast/821688
subject: Poets, English
valueUri: http://id.worldcat.org/fast/1067870

description: Part of a collection of correspondence from Kathleen Raine to Herbert Read. Raine was a British scholar and poet who was awarded the Queen’s Gold Medal for Poetry in 1992. The correspondence here follows Raine’s work on a book about William Blake’s mythology. Other topics include discussion of philosophical and metaphysical subjects, and references to acquaintances in literary and arts circles. In this letter Raine reveals that she feels unpopular in certain parties for refusing to share their opinion. She also mentions her struggle to balance different aspects of Blake's writing.