cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Modeling the Performance of Amorphous Silicon Photovoltaic Modules in Different Geographical Locations in Europe
Creators: name: Virtuani, A.
name: Skoczek, A.
name: Strepparava, D.
Publisher: name: WIP
Year: 2014
Subjects: OPERATIONS, PERFORMANCE AND RELIABILITY OF PHOTOVOLTAICS (from Cells to Systems)
PV Modules

description: 29th European Photovoltaic Solar Energy Conference and Exhibition; 2424-2428
description: In this work we use and further elaborate a previously proposed approach which models the energy
performance of an amorphous silicon (a-Si) PV module, including the well-known Staebler-Wronsky effect, typical
or this technology. So far, the limit of the model is its focus on sunny days only. The extensions of the model to cover
other geographical locations in Europe, using as solar and meteorological input parameters time series provided by
GeoModel, shows that the model can be used to describe, clearly distinguishing between the impact of the different
contributions (i.e. reflection, spectral, temperature, irradiance) the energy performance of a-Si and its very peculiar
seasonal pattern. In addition it further reinforces the idea that this technology is more suited to warmer climates
(SWE) and to latitudes (in the northern hemisphere) between 0 and 45-50°, due to the massive spectral losses for this
technology in winter time at high latitudes (on sunny days). Further, we show that for each site we are able to
decouple spectral and SW effects, which are very specific to this technology, and act on similar time phases. SWE
effects become more significant for warmer climates (Sevilla, Lugano), whereas the impact of spectral losses
becomes very significant at high latitudes (Tallin, Lübeck) in winter time.
Taphozous mauritianus E. Geoffroy 1818
Creators: name: Koopman, Karl F.
Publisher: name: Zenodo
Year: 1993
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Emballonuridae
Taphozous
Taphozous mauritianus

description: Taphozous mauritianus E. Geoffroy, 1818. Descrip, de L'Egypte, 2:127. TYPE LOCALITY: Mauritius. DISTRIBUTION: South Africa to Sudan and Somalia to Senegal; Mauritius and Reunion Isis (Mascarene Isis); Madagascar; Assumption Isl and Aldabra Isl. SYNONYMS: cinerascens, dobsoni, leucopterus. COMMENTS: Subgenus Taphozous.
description: Published as part of Karl F. Koopman, 1993, Order Chiroptera, pp. 137-241 in Mammal Species of the World (2 nd Edition), Washington and London :Smithsonian Institution Press on page 160, DOI: 10.5281/zenodo.7353060
Topological Surgery, Dynamics and Applications To Natural Processes
Creators: name: Lambropoulou, Sofia
name: Antoniou, Stathis
Publisher: name: arXiv
Year: 2016
Subjects: subject: Geometric Topology (math.GT)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 57R65, 57N12, 57M25, 57M99, 37B99, 92B99

description: In this paper we observe that 2-dimensional 0-surgery occurs in natural processes, such as tornado formation and other phenomena reminiscent of hole drilling. Inspired by such phenomena, we introduce new theoretical concepts which enhance the formal definition of 2-dimensional 0-surgery with the observed dynamics. To do this, we first present a schematic model which extends the formal definition to a continuous process caused by local forces. Next, for modeling phenomena which do not happen on surfaces but are three-dimensional, we fill the interior space by defining the notion of solid 2-dimensional 0-surgery. Finally, we connect these new theoretical concepts with a dynamical system and present it as a model for both 2-dimensional 0-surgery and natural phenomena exhibiting it. We hope that through this study, topology and dynamics of many natural phenomena will be better understood.
description: 8 pages, 6 figures. arXiv admin note: substantial text overlap with arXiv:1603.03644
Fast Hot Spot Evaluation
Creators: name: Geisemeyer, I.
name: Fertig, F.
name: Warta, W.
name: Rein, S.
name: Schubert, M.C.
Publisher: name: WIP
Year: 2014
Subjects: OPERATIONS, PERFORMANCE AND RELIABILITY OF PHOTOVOLTAICS (from Cells to Systems)
Standardisation as Tool for Innovation and Cost Reduction

description: 29th European Photovoltaic Solar Energy Conference and Exhibition; 2429-2434
description: We present a method which provides simple and fast evaluation of the hot spot potential of solar cells before the module assembly process. The method is based on convoluting power dissipation images measured with infrared thermography with specially designed point spread functions. The result is a temperature image of a cell under critical shading conditions of the module. For validation of the method we conduct a laboratory experiment with bare cells. Measured temperature fields of exemplary solar cells are compared to simulated images. The transfer from laboratory conditions for bare cells to outdoor module conditions is performed by using additional three-dimensional numerical simulations. It is shown that the method can in principle be used for inline application.
EU-Klimapaket und Klimabeschluss des Bundesverfassungsgerichts : Auswirkungen für die deutsche Wirtschaft
Creators: name: Frenz, Walter
Publisher: name: RWTH Aachen University
Year: 2022

description: 23. Umweltakademie Fresenius-Fachtagung Umweltrecht für Umweltbeauftragte, Mainz, Germany, 22 Mar 2022 - 23 Mar 2022; 15 Folien (2022).
Psychological distress and caring for depressed elderly people
Creators: name: Yeatman, Richard John Elliot.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Qubit-environment entanglement outside of pure decoherence: hyperfine interaction
Creators: name: Salamon, Tymoteusz
name: Płodzień, Marcin
name: Lewenstein, Maciej
name: Roszak, Katarzyna
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In spin-based architectures of quantum devices, the hyperfine interaction between the electron spin qubit and the nuclear spin environment remains one of the main sources of decoherence. This paper provides a short review of the current advances in the theoretical description of the qubit decoherence dynamics. Next, we study the qubit-environment entanglement using negativity as its measure. For an initial maximally mixed state of the environment, we study negativity dynamics as a function of environment size, changing the numbers of environmental nuclei and the total spin of the nuclei. Furthermore, we study the effect of the magnetic field on qubit-environment disentangling time scales.
Taphozous melanopogon Temminck 1841
Creators: name: Koopman, Karl F.
Publisher: name: Zenodo
Year: 1993
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Emballonuridae
Taphozous
Taphozous melanopogon

description: Taphozous melanopogon Temminck, 1841. Monogr. Mamm., 2:287. TYPE LOCALITY: Indonesia, W Java, Bantam. DISTRIBUTION: Sri Lanka; India; Burma; Thailand; Laos; Vietnam; S China; Malay Peninsula and adjacent islands; Borneo; Sumatra, Java, Savu Isl, Lombok, Sumbawa, Timor, Kei Isis, and Sulawesi (Indonesia). SYNONYMS: achates, bicolor, cavaticus, fretensis. COMMENTS: Subgenus Taphozous.
description: Published as part of Karl F. Koopman, 1993, Order Chiroptera, pp. 137-241 in Mammal Species of the World (2 nd Edition), Washington and London :Smithsonian Institution Press on pages 160-161, DOI: 10.5281/zenodo.7353060
Positive Signs in Massive Gravity
Creators: name: Cheung, Clifford
name: Remmen, Grant N.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We derive new constraints on massive gravity from unitarity and analyticity of scattering amplitudes. Our results apply to a general effective theory defined by Einstein gravity plus the leading soft diffeomorphism-breaking corrections. We calculate scattering amplitudes for all combinations of tensor, vector, and scalar polarizations. The high-energy behavior of these amplitudes prescribes a specific choice of couplings that ameliorates the ultraviolet cutoff, in agreement with existing literature. We then derive consistency conditions from analytic dispersion relations, which dictate positivity of certain combinations of parameters appearing in the forward scattering amplitudes. These constraints exclude all but a small island in the parameter space of ghost-free massive gravity. While the theory of the "Galileon" scalar mode alone is known to be inconsistent with positivity constraints, this is remedied in the full massive gravity theory.
description: 19 pages, 3 figures; supplementary file with full scattering amplitude is attached separately
Erwin Marquardt als Repräsentant der Volkshochschule Groß-Berlin am Ende der Weimarer Republik.
Creators: name: Rzehak, Henrike
Publisher: name: Humboldt-Universität zu Berlin
Year: 2022
Subjects: subject: Erwachsenenbildung
subject: Weimarer Republik
subject: Volkshochschule
subject: Arbeiterschaft
subject: Bildungsgerechtigkeit
subject: 374 Erwachsenenbildung

description: Erwin Marquardt leitete in den späten Jahren der Weimarer Republik (1929-1933) die Volkshochschule Groß-Berlin. Über sein erwachsenenbildnerisches Wirken liegen bisher vergleichsweise wenig Forschungsbefunde vor. Das Anliegen der vorliegenden Arbeit besteht darin, die Kernaspekte seiner Volkshochschulkonzeption herauszuarbeiten. Zu-gleich wird der Frage nachgegangen, inwiefern diese sich als Aspekte einer praktisch fundierten bildungstheoretischen Neuausrichtung im damaligen Volkshochschulkontext begreifen lassen. Hierzu werden die von Marquardt im Zeitraum von 1930 bis 1933 in der Gewerkschaftszeitschrift „Die Arbeit“ veröffentlichten elf Artikel mit dem gleichnamigen Titel „Volkshochschule – Freie Volksbildung“ einer historischen Inhaltsanalyse unterzogen. Zu Beginn der Arbeit werden zunächst die Genese der Erwachsenenbildung in Deutsc-land und die Biographie Marquardts nachgezeichnet. Die anschließende Inhaltsanalyse erfolgt in einem zweistufigen Verfahren, welches sich durch einen deskriptiven sowie einen interpretativen Modus auszeichnet. Anschließend werden vier Themenschwerpunkte, die sich aus der interpretativen Analysesequenz ergeben, vor dem Hintergrund der Fragestellung nach Marquardts Volkshochschulkonzeption diskutiert. Die herausge-arbeiteten Schwerpunkte lauten „Kritik“, „Aufgabenbereich der Volkshochschule“, „Orga-nisation der Volkshochschule“ und „Didaktische Überlegungen (Methodik)“. Abschließend wird die Rekonstruktion der Volkshochschulkonzeption Marquardts in einem Resümee zusammengefasst. Es wird hervorgehoben, dass Marquardt sich für eine Erwachsenenbildung einsetzte, die sich an den konkreten Bildungsbedürfnissen der sozio-ökonomisch benachteiligten Arbeiterschaft orientierte. Sein Anliegen bestand darin, Bil-dungsgerechtigkeit herzustellen um die politische Teilhabe aller Gesellschaftsmitglieder zu ermöglichen.
Angle-of-Incidence Losses and Their Influence on the Annual Energy
Creators: name: Yusufoglu, U.A.
name: Pletzer, T.M.
name: Min, B.
name: Kurz, H.
Publisher: name: WIP
Year: 2014
Subjects: OPERATIONS, PERFORMANCE AND RELIABILITY OF PHOTOVOLTAICS (from Cells to Systems)
PV Modules

description: 29th European Photovoltaic Solar Energy Conference and Exhibition; 2419-2423
description: Solar modules with antireflection-coated (ARC) glasses and with the encapsulation material silicone instead of ethylene vinyl acetate (EVA) show less optical losses compared to standard modules. Although the advantages of coated glasses have been shown for specific locations and module orientations there is a lack in a complete study covering all relevant module orientations where the most of the angle of incidence (AOI) losses occur. Additionally, an analysis of the potential offered by the use of silicone as an encapsulant is required. In this study, we simulate the annual energy gain obtained through the use of these different optical layers in three locations; Oslo, Munich and Istanbul. Modules with coated glasses increase the annual energy up to 3.1% compared to standard module. This gain increases up to 6.9% if silicone and coated glass is used. There is a steady increase in energy gain for modules with deviating orientations from the optimal south, reaching up to 7.5% for east/west orientation due to the increased harvesting of diffuse light owing to nearly horizontal inclination and better utilization of abundant oblique incidence angles.
Superconductivity in the Niobium-rich compound Nb5Se4
Creators: name: Klimczuk, T.
name: Baroudi, K.
name: Krizan, J. W.
name: Kozub, A. L.
name: Cava, R. J.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The niobium rich selenide compound Nb5Se4 was synthesized at ambient pressure by high-temperature solid-state reaction in a sealed Ta tube. Resistivity and heat capacity measurements reveal that this compound is superconducting, with a T_c = 1.85K. The electronic contribution to the specific heat γ and the Debye temperature are found to be 18.1 mJ/mol/K^2 and 298 K respectively. The calculated electron-phonon coupling constant λ_ep = 0.5 and the ΔC_p/γTc = 1.42 ratio imply that Nb5Se4 is a weak coupling BCS superconductor. The upper critical field and coherence length are found to be 1.44 T and 15.1 nm, respectively.
title: Amphiphilic Polymer Conetwork Gel Films Based on Tetra-Poly(ethylene Glycol) and Tetra-Poly(ε-Caprolactone)
Creators: name: Hagmann, Kevin
name: Bunk, Carolin
name: Böhme, Frank
name: Klitzing, Regine von
Publisher: name: MDPI
Year: 2022

description: The preparation and investigation of gel films from a model amphiphilic polymer conetwork (ACN) grant a deeper control and understanding of the structure–property relationship in the bulk phase and at the interface of materials with promising applications. In order to allow the simultaneous transport of hydrophilic and hydrophobic substances, polymeric networks with finely distributed hydrophilic and hydrophobic components are very suitable. When designing new soft materials such as coatings, in addition to the structure in the bulk phase, the structure at the interface plays a critical role. In this study, two alternating tetra-arm star polymers poly(ε-caprolactone) (tetra-PCLOx) and amino-terminated poly(ethylene glycol) (tetra-PEG-NH2 ) form an amphiphilic polymer conetwork. The correlation between different synthesis strategies for gel films of this ACN model system and their resulting properties will be described. Through various spin coating techniques, control over film thickness and roughness is achievable and highlights differences to macroscopic gel samples. Atomic force microscopy (AFM) measurements reveal the effect of solvents of different polarities on the swelling ability and surface structure. This correlates with AFM investigations of the mechanical properties on ACN gel films, demonstrating a strong effect on the resulting elastic modulus E, depending on the presence or absence of a good solvent during synthesis. Furthermore, a higher E modulus is obtained in the presence of the selective solvent water, compared to the nonselective solvent toluene. This observation is explained through selective swelling of the tetra-arm star polymers displaying a different hydrophobicity.
Taphozous nudiventris Cretzschmar 1830
Creators: name: Koopman, Karl F.
Publisher: name: Zenodo
Year: 1993
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Emballonuridae
Taphozous
Taphozous nudiventris

description: Taphozous nudiventris Cretzschmar, 1830. In Rüppell, Atlas Reise Nordl. Afr., Zool. Säugeth., 1:70. TYPE LOCALITY: Egypt, Giza. DISTRIBUTION: Mauritania, Senegal, and Guinea-Bissau to Egypt, south to Tanzania and east to Burma. SYNONYMS: assabensis, babylonicus, kachhensis, ntagnus, nudaster, serratus, ziyidi. COMMENTS: Subgenus Liponycteris. Includes kachhensis; see Felten (1962:175). Formerly included in genus Liponycteris; see Hayman and Hill (1971:15).
description: Published as part of Karl F. Koopman, 1993, Order Chiroptera, pp. 137-241 in Mammal Species of the World (2 nd Edition), Washington and London :Smithsonian Institution Press on page 161, DOI: 10.5281/zenodo.7353060
description: {"references": ["Felten, H. 1962. Bemerkungen zu Fledermausen der Gattungen Rhinopoma und Taphozous (Mammalia, Chiroptera). Senckenbergiana Biologica, 43: 171 - 176.", "Hayman, R. W., and J. E. Hill. 1971. Order Chiroptera. Part 2. Pp. 1 - 73, in The mammals of Africa: An identification manual (J. Meester and H. W. Setzer, eds.) [issued 15 Jul 1971]. Smithsonian Institution Press, Washington, D. C., not continuously paginated."]}
Assessment of alcohol and drug use in an urban Aboriginal community
Creators: name: Kuttner, Miriam.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Tristagma porrifolium Traub 1963
Creators: name: Arroyo-Leuenberger, Silvia C.
name: Sassone, Agostina B.
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Asparagales
Amaryllidaceae
Tristagma
Tristagma porrifolium

description: 11. Tristagma porrifolium (Poepp.) Traub (1963: 61)
 Bas.: Triteleia porrifolia Poeppig (1833: 10) ≡ Milla porrifolia (Poepp.) Baker (1871: 386) ≡ Brodiaea porrifolia (Poepp.) Meigen (1893: 225) ≡ Hookera porrifolia (Poepp.) Kuntze (1891: 712) ≡ Ipheion porrifolium (Poepp.) Traub (1953: 69). Type (lectotype, designated here):— CHILE. Region Valparaiso: Valparaíso [In collib. ex arena mobili litt. oceani pacif. prope Concon], August 1827, Poeppig Col. Pl. chilenas CVI, Diar. 1. 192 (HAL 0092771!, isolectotype BM 001122331!).
 Notes: — The specimen at HAL bears a label in Poeppig’s handwriting, but following McNeill (2014) we prefer to designate it as lectotype, since we cannot be sure that the holotype was not at Leipzig prior to the wartime destruction of herbarium LZ.
 Iconography: — Poeppig, Nov. Gen. Sp. Pl. (Poeppig & Endlicher) vol. 2: t. 139. 1838; Hooker, Curtis Bot. Mag. t. 5977: 1872.
 Conservation status: — Data Deficient (DD). This species is rare in herbaria, probably restricted to a small area, but there is not enough information to make a proper assessment of conservation status.
description: Published as part of Arroyo-Leuenberger, Silvia C. & Sassone, Agostina B., 2016, An annotated checklist of the genus Tristagma (Amaryllidaceae, Allioideae), pp. 21-35 in Phytotaxa 277 (1) on page 31, DOI: 10.11646/phytotaxa.277.1.2, http://zenodo.org/record/13652894
Raman phonon spectrum of the Dzyaloshinskii-Moriya helimagnet Ba2CuGe2O7
Creators: name: Capitani, F.
name: Koval, S.
name: Fittipaldi, R.
name: Caramazza, S.
name: Paris, E.
name: Mohamed, W. S.
name: Lorenzana, J.
name: Nucara, A.
name: Rocco, L.
name: Vecchione, A.
name: Postorino, P.
name: Calvani, P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The Raman spectrum of Ba2CuGe2O7, a tetragonal insulator which develops Dzyaloshinsky- Moriya helical magnetism below TN = 3.2 K, has been detected at temperatures varying from 300 to 80 K in a single crystal, with the radiation polarized either in the ab plane or along the c axis of its tetragonal cell. 29 phonon lines out of the 35 allowed by the Raman selection rules for the present geometry were observed, and their vibrational frequencies were found in overall good agreement with those provided by shell-model calculations. Together with the previous report on the infrared-active phonons [A. Nucara et al., Phys. Rev. B 90, 014304 (2014)] the present study provides an exhaustive description, both experimental and theoretical, of the lattice dynamics in Ba2CuGe2O7.
A Residential Micro-Grid in an Unreliable Grid Context
Creators: name: Chianese, D.
name: Rivola, D.
name: Shrestha, J.N.
name: Zahnd, A.
Publisher: name: WIP
Year: 2014
Subjects: OPERATIONS, PERFORMANCE AND RELIABILITY OF PHOTOVOLTAICS (from Cells to Systems)
Operation of PV Systems and Plants

description: 29th European Photovoltaic Solar Energy Conference and Exhibition; 2393-2398
description: The electricity network in developing countries is often characterized by a weak stability of voltage
and frequency, frequent accidental power cuts, high losses in the distribution network and regular planned load
shedding schemes. All these issues prevent normal access to electricity by the population, inhibiting and
impoverishing the whole country. One approach to overcoming these issues is to switch from the centralized
paradigm of old power production schemes to a new decentralized generation of power.
Needs and difficulties in developing countries are different compared to residential and SME in developed countries.
Therefore, new inverters which are suitable in power range and settings for a decentralized residential PV system
with backup are needed. In this project we explore the technical challenges to connecting small residential gridconnected
(GC) PV systems with and without storage capabilities. The first five small photovoltaic residential
systems (1.1kWp) were installed in the Kathmandu Valley in October 2012. Three locations reflecting the typical
conditions of the electricity grid in Kathmandu were chosen. Load shedding and power cuts occur during 38.1% of
the time (9.2 hrs/day and ranging from 6.7 to 12 hrs/day). In the reference location without load shedding, three PV
systems produced an average of 1600 kWh/kWp annually. With load shedding, production was 44% lower. In the
third location a residential microgrid with a 9.6kWh storage system generated 15% lower energy compared to the
reference location but delivered energy 100% of the time.
Multi-frequency Black Hole Imaging for the Next-Generation Event Horizon Telescope
Creators: name: Chael, Andrew
name: Issaoun, Sara
name: Pesce, Dominic W.
name: Johnson, Michael D.
name: Ricarte, Angelo
name: Fromm, Christian M.
name: Mizuno, Yosuke
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The Event Horizon Telescope (EHT) has produced images of the plasma flow around the supermassive black holes in Sgr A* and M87* with a resolution comparable to the projected size of their event horizons. Observations with the next-generation Event Horizon Telescope (ngEHT) will have significantly improved Fourier plane coverage and will be conducted at multiple frequency bands (86, 230, and 345 GHz), each with a wide bandwidth. At these frequencies, both Sgr A* and M87* transition from optically thin to optically thick. Resolved spectral index maps in the near-horizon and jet-launching regions of these supermassive black hole sources can constrain properties of the emitting plasma that are degenerate in single-frequency images. In addition, combining information from data obtained at multiple frequencies is a powerful tool for interferometric image reconstruction, since gaps in spatial scales in single-frequency observations can be filled in with information from other frequencies. Here we present a new method of simultaneously reconstructing interferometric images at multiple frequencies along with their spectral index maps. The method is based on existing Regularized Maximum Likelihood (RML) methods commonly used for EHT imaging and is implemented in the eht-imaging Python software library. We show results of this method on simulated ngEHT data sets as well as on real data from the VLBA and ALMA. These examples demonstrate that simultaneous RML multi-frequency image reconstruction produces higher-quality and more scientifically useful results than is possible from combining independent image reconstructions at each frequency.
description: 25 pages, 15 figures. Accepted to ApJ
title: Microstructural Analysis and Mechanical Characterization of Shape Memory Alloy Ni-Ti-Ag Synthesized by Casting Route
Creators: name: Salman, Khansaa Dawood
name: Al-Maliki, Wisam Abed Kattea
name: Alobaid, Falah
name: Epple, Bernd
Publisher: name: MDPI
Year: 2022

description: The purpose of the current research is to study the microstructure and mechanical properties of Ni-Ti-Ag shape memory alloys prepared by the casting route. Ag (grain size at 1 mm) was incorporated into Ni-Ti alloys at varying percentages of weight (0, 1.5, 3 and 4.5 wt.% Ag) to produce shape memory alloys using a Vacuum Arc Re-melting (VAR) furnace. Microstructural analysis was defined by FESEM microscopy and XRD examinations, while the transformation temperatures of the Ni-Ti-Ag shape memory alloy were determined by DSC examination. On the other hand, determination of mechanical properties was carried out using micro-hardness and compressive tests. The results of this work show that Ag was dispersed homogeneously into the Ni-Ti alloy. Moreover, two primary phases (austenite phase and martensite phase) emerged with few impurities. The results of the XRD examination show that the number of Ag peaks increased with the increase in weight percentage of Ag. The transformation temperature of the austenitic phase was defined as −1.6 ◦C by DSC. The mechanical characterizations increased with the increase in weight percentages of Ag (1.5, 3 and 4.5 wt.%), and significantly affected the mechanical properties of the Ni-Ti alloy. An improvement in compressive strength (42.478%) was found for the alloy with 3 wt.% Ag, while the micro-hardness results show a slight decrease in micro-hardness (8.858%) for the alloy with 4.5 wt.% Ag.
Designing a novel strategy for exploring literature corpora
Creators: name: Wagner, Gerit
name: Empl, Philip
name: Schryen, Guido
Publisher: name: Universität Regensburg
Year: 2020
Subjects: subject: Reading and skimming, exploring literature, review methodology, design science research, schemata theory
subject: 004 Informatik
subject: 150 Psychologie

description: Understanding a new literature corpus can be a grueling experience for junior scholars. Nevertheless, corresponding guidelines have not been updated for decades. We contend that the traditional strategy of skimming all papers and reading selected papers afterwards needs to be revised. Therefore, we design a new strategy that guides the overall exploratory process by prioritizing influential papers for initial reading, followed by skimming the remaining papers. Consistent with schemata theory, starting with indepth reading allows readers to acquire more substantial prior content schemata, which are representative for the literature corpus and useful in the following skimming process. To this end, we develop a prototype that identifies the influential papers from a set of PDFs, which is illustrated in a case study in the IT business value domain. With the new strategy, we envision a more efficient process of exploring unknown literature corpora.
Discovery of Broad Soft X-ray Absorption Lines from the Quasar Wind in PDS 456
Creators: name: Reeves, James
name: Braito, Valentina
name: Nardini, Emanuele
name: Behar, Ehud
name: O'Brien, Paul
name: Tombesi, Francesco
name: Turner, Tracey Jane
name: Costa, Michele
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: High resolution soft X-ray spectroscopy of the prototype accretion disk wind quasar, PDS 456, is presented. Here, the XMM-Newton RGS spectra are analyzed from the large 2013-2014 XMM-Newton campaign, consisting of 5 observations of approximately 100 ks in length. During the last observation (hereafter OBS. E), the quasar is at a minimum flux level and broad absorption line profiles are revealed in the soft X-ray band, with typical velocity widths of $σ_{\rm v}\sim 10,000$ km s$^{-1}$. During a period of higher flux in the 3rd and 4th observations (OBS. C and D, respectively), a very broad absorption trough is also present above 1 keV. From fitting the absorption lines with models of photoionized absorption spectra, the inferred outflow velocities lie in the range $\sim 0.1-0.2c$. The absorption lines likely originate from He and H-like neon and L-shell iron at these energies. Comparison with earlier archival data of PDS 456 also reveals similar absorption structure near 1 keV in a 40 ks observation in 2001, and generally the absorption lines appear most apparent when the spectrum is more absorbed overall. The presence of the soft X-ray broad absorption lines is also independently confirmed from an analysis of the XMM-Newton EPIC spectra below 2 keV. We suggest that the soft X-ray absorption profiles could be associated with a lower ionization and possibly clumpy phase of the accretion disk wind, where the latter is known to be present in this quasar from its well studied iron K absorption profile and where the wind velocity reaches a typical value of 0.3$c$.
description: 44 pages, including 13 figures, accepted for publication in The Astrophysical Journal
Floquet engineering of magnetic topological insulator MnBi$_2$Te$_4$ films
Creators: name: Zhu, Tongshuai
name: Wang, Huaiqiang
name: Zhang, Haijun
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Floquet engineering is an important way to manipulate the electronic states of condensed matter physics. Recently, the discovery of the magnetic topological insulator MnBi$_2$Te$_4$ and its family provided a valuable platform to study magnetic topological phenomena, such as, the quantum anomalous Hall effect, the axion insulator state and the topological magnetoelectric effect. In this work, based on the effective model and first-principles calculations in combination with the Floquet theory, we reveal that the circularly polarized light (CPL) induces the sign reversal of the Chern number of odd-septuple-layer (SL) MnBi$_2$Te$_4$ thin films. In contrast, the CPL drives the axion insulator state into the quantum anomalous Hall state in even-SL MnBi$_2$Te$_4$ thin films. More interestingly, if the topmost van der Waals gap between the surface layer and the below bulk in MnBi$_2$Te$_4$ films is slightly expanded, a high Chern number $|C|=2$ can be realized under the CPL. Our work demonstrates that the light can induce rich magnetic topological phases in MnBi$_2$Te$_4$ films, which might have potential applications in optoelectronic devices.
description: 7 pages, 4 figures
3D Simulation of Complex Shading Affecting PV Systems Taking Benefit from the Power of Graphics Cards Developed for the Video Game Industry
Creators: name: Robledo Bueno, J.
name: Leloux, J.
name: Lorenzo, E.
Publisher: name: WIP
Year: 2014
Subjects: OPERATIONS, PERFORMANCE AND RELIABILITY OF PHOTOVOLTAICS (from Cells to Systems)
Operation of PV Systems and Plants

description: 29th European Photovoltaic Solar Energy Conference and Exhibition; 2310-2314
description: Shading reduces the power output of a photovoltaic (PV) system. The design engineering of PV systems requires modeling and evaluating shading losses. Some PV systems are affected by complex shading scenes whose resulting PV energy losses are very difficult to evaluate with current modeling tools. Several specialized PV design and simulation software include the possibility to evaluate shading losses. They generally possess a Graphical User Interface (GUI) through which the user can draw a 3D shading scene, and then evaluate its corresponding PV energy losses. The complexity of the objects that these tools can handle is relatively limited. We have created a software solution, 3DPV, which allows evaluating the energy losses induced by complex 3D scenes on PV generators. The 3D objects can be imported from specialized 3D modeling software or from a 3D object library. The shadows cast by this 3D scene on the PV generator are then directly evaluated from the Graphics Processing Unit (GPU). Thanks to the recent development of GPUs for the video game industry, the shadows can be evaluated with a very high spatial resolution that reaches well beyond the PV cell level, in very short calculation times. A PV simulation model then translates the geometrical shading into PV energy output losses. 3DPV has been implemented using WebGL, which allows it to run directly from a Web browser, without requiring any local installation from the user. This also allows taken full benefits from the information already available from Internet, such as the 3D object libraries. This contribution describes, step by step, the method that allows 3DPV to evaluate the PV energy losses caused by complex shading. We then illustrate the results of this methodology to several application cases that are encountered in the world of PV systems design.
Xenotime reveals Caledonian hydrothermal overprint on Neoproterozoic Cu mineralization, East Greenland
Creators: name: Olierook, Hugo K. H.
name: Crook, Kelsey
name: Sinclair, Penelope
name: Fougerouse, Denis
name: Joseph, Cilva
name: Kirkland, Christopher L.
name: Kennedy, Allen
name: Gao, Hao
name: Evans, Noreen J.
name: McDonald, Bradley J.
name: Quintero, Raiza R.
name: Kumara, Anusha Shantha
name: Cameron, Graeme
name: Walsh, Ben
name: Ritchie, Meghan
name: Roberts, Malcolm P.
name: McInnes, Brent I. A.
Publisher: name: Geological Society of London
Year: 2023
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences

description: Supplementary Figure A: Compilation of all automatic mineral analysis maps for all new polished blocks.
Quantum correlations, separability and quantum coherence length in equilibrium many-body systems
Creators: name: Malpetti, Daniele
name: Roscilde, Tommaso
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Non-locality is a fundamental trait of quantum many-body systems, both at the level of pure states, as well as at the level of mixed states. Due to non-locality, mixed states of any two subsystems are correlated in a stronger way than what can be accounted for by considering correlated probabilities of occupying some microstates. In the case of equilibrium mixed states, we explicitly build two-point quantum correlation functions, which capture the specific, superior correlations of quantum systems at finite temperature, and which are directly { accessible to experiments when correlating measurable properties}. When non-vanishing, these correlation functions rule out a precise form of separability of the equilibrium state. In particular, we show numerically that quantum correlation functions generically exhibit a finite \emph{quantum coherence length}, dictating the characteristic distance over which degrees of freedom cannot be considered as separable. This coherence length is completely disconnected from the correlation length of the system -- as it remains finite even when the correlation length of the system diverges at finite temperature -- and it unveils the unique spatial structure of quantum correlations.
description: 4+5 pages, 2+1 figures
PID-Free CIGS Thin Film Modules
Creators: name: Borowski, P.
name: Karg, F.
Publisher: name: WIP
Year: 2014
Subjects: OPERATIONS, PERFORMANCE AND RELIABILITY OF PHOTOVOLTAICS (from Cells to Systems)
Performance and Reliability of Solar Cells

description: 29th European Photovoltaic Solar Energy Conference and Exhibition; 2356-2362
description: Many photovoltaic (PV) modules are susceptible to potential-induced degradation (PID), a degradation path induced by permanent high electrical potential on the active components against the grounded mounting structure. PID can be avoided by installing certain grounding conditions on the DC side of a PV system, a method many manufacturers of thin film modules prescribe to their customers. Through extensive experiments on variations of both pilot line and production size modules, we were able to identify critical module components and materials in substrate Copper-Indium-Gallium-Selenide (CIGS) modules with regard to PID. A product upgrade of the AVANCIS PowerMax® SMART module implements these findings and passes both our internal accelerated PID test (constituting the harshest test conditions industry-wide) as well as the fivefold extended draft standard for crystalline silicon modules as certified externally by FhG-ISE.
Geometric Flows of $G_2$-Structures on 3-Sasakian 7-Manifolds
Creators: name: Kennon, Aaron
name: Lotay, Jason D.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: A 3-Sasakian structure on a 7-manifold may be used to define two distinct Einstein metrics: the 3-Sasakian metric and the squashed Einstein metric. Both metrics are induced by nearly parallel $G_2$-structures which may also be expressed in terms of the 3-Sasakian structure. Just as Einstein metrics are critical points for the Ricci flow up to rescaling, nearly parallel $G_2$-structures provide natural critical points of the (rescaled) geometric flows of $G_2$-structures known as the Laplacian flow and Laplacian coflow. We study each of these flows in the 3-Sasakian setting and see that their behaviour is markedly different, particularly regarding the stability of the nearly parallel $G_2$-structures. We also compare the behaviour of the flows of $G_2$-structures with the (rescaled) Ricci flow.
description: 23 pages and 3 figures; v2: minor changes, version accepted for publication in Journal of Geometry and Physics
Determining the Age of the Kepler Open Cluster NGC 6819 With a New Triple System and Other Eclipsing Binary Stars
Creators: name: Brewer, Lauren N.
name: Sandquist, Eric L.
name: Mathieu, Robert D.
name: Milliman, Katelyn
name: Geller, Aaron M.
name: Jeffries, Mark W.
name: Orosz, Jerome A.
name: Brogaard, Karsten
name: Platais, Imants
name: Bruntt, Hans
name: Grundahl, Frank
name: Stello, Dennis
name: Frandsen, Soeren
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: As part of our study of the old (~2.5 Gyr) open cluster NGC 6819 in the Kepler field, we present photometric (Kepler and ground-based BVRcIc) and spectroscopic observations of the detached eclipsing binary WOCS 24009 (Auner 665; KIC 5023948) with a short orbital period of 3.6 days. WOCS 24009 is a triple-lined system, and we verify that the brightest star is physically orbiting the eclipsing binary using radial velocities and eclipse timing variations. The eclipsing binary components have masses M_B =1.090+/-0.010 Msun and M_C =1.075+/-0.013 Msun, and radii R_B =1.095+/-0.007 Rsun and R_C =1.057+/-0.008 Rsun. The bright non-eclipsing star resides at the cluster turnoff, and ultimately its mass will directly constrain the turnoff mass: our preliminary determination is M_A =1.251+/-0.057 Msun. A careful examination of the light curves indicates that the fainter star in the eclipsing binary undergoes a very brief period of total eclipse, which enables us to precisely decompose the light of the three stars and place them in the color-magnitude diagram. We also present improved analysis of two previously discussed detached eclipsing stars in NGC 6819 (WOCS 40007 and WOCS 23009) en route to a combined determination of the cluster's distance modulus (m-M)_V=12.38+/-0.04. Because this paper significantly increases the number of measured stars in the cluster, we can better constrain the age of the color-magnitude diagram to be 2.21+/-0.10+/-0.20 Gyr. Additionally, using all measured eclipsing binary star masses and radii, we constrain the age to 2.38+/-0.05+/-0.22 Gyr. The quoted uncertainties are estimates of measurement and systematic uncertainties (due to model physics differences and metal content), respectively.
description: accepted to AJ, 13 figures, eclipse timings and radial velocity data will be available with the journal article
Taphozous perforatus E. Geoffroy 1818
Creators: name: Koopman, Karl F.
Publisher: name: Zenodo
Year: 1993
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Emballonuridae
Taphozous
Taphozous perforatus

description: Taphozous perforatus E. Geoffroy, 1818. Descrip, de L'Egypte, 2:126. TYPE LOCALITY: Egypt, Kom Ombo. DISTRIBUTION: Senegal to Botswana, Mozambique, Somalia and Egypt; S Arabia; S Iran; Pakistan; NW India. SYNONYMS: haedinus, maritimus, rhodesiae, senegalensis, Sudani, swirae. COMMENTS: Subgenus Taphozous. Includes senegalensis and Sudani; see Hayman and Hill (1977:16).
description: Published as part of Karl F. Koopman, 1993, Order Chiroptera, pp. 137-241 in Mammal Species of the World (2 nd Edition), Washington and London :Smithsonian Institution Press on page 161, DOI: 10.5281/zenodo.7353060
Universality of the muon component of extensive air showers
Creators: name: Cazon, Lorenzo
name: Conceição, Rúben
name: Riehn, Felix
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In extensive air shower experiments, the number of muons crossing a detector at a given position, as well as their arrival time, arrival direction, and energy, are determined by a more fundamental 3-dimensional distribution linked to the hadronic core of the shower. Muons are produced high up in the atmosphere after the decay of mesons in the hadronic cascade. The distributions of production depth, energy, and transverse momentum of muons are enough to fully predict the muon component of air showers in any particular observational condition. By using air-shower simulations with the state-of-the-art hadronic interaction models, the mentioned distributions at production are analyzed as a function of zenith angle, primary mass, and hadronic interaction model, and their level of universality is studied and assessed in an exhaustive manner for the first time.
Mining Valence, Arousal, and Dominance - Possibilities for Detecting Burnout and Productivity?
Creators: name: Mäntylä, Mika
name: Adams, Bram
name: Destefanis, Giuseppe
name: Graziotin, Daniel
name: Ortu, Marco
Publisher: name: arXiv
Year: 2016
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Similar to other industries, the software engineering domain is plagued by psychological diseases such as burnout, which lead developers to lose interest, exhibit lower activity and/or feel powerless. Prevention is essential for such diseases, which in turn requires early identification of symptoms. The emotional dimensions of Valence, Arousal and Dominance (VAD) are able to derive a person's interest (attraction), level of activation and perceived level of control for a particular situation from textual communication, such as emails. As an initial step towards identifying symptoms of productivity loss in software engineering, this paper explores the VAD metrics and their properties on 700,000 Jira issue reports containing over 2,000,000 comments, since issue reports keep track of a developer's progress on addressing bugs or new features. Using a general-purpose lexicon of 14,000 English words with known VAD scores, our results show that issue reports of different type (e.g., Feature Request vs. Bug) have a fair variation of Valence, while increase in issue priority (e.g., from Minor to Critical) typically increases Arousal. Furthermore, we show that as an issue's resolution time increases, so does the arousal of the individual the issue is assigned to. Finally, the resolution of an issue increases valence, especially for the issue Reporter and for quickly addressed issues. The existence of such relations between VAD and issue report activities shows promise that text mining in the future could offer an alternative way for work health assessment surveys.
description: 12 pages, 1 figure, accepted for presentation and publication at the 13th International Conference on Mining Software Repositories May 14-15, 2016. Austin, Texas
A descriptive investigation of psychotic prodrome
Creators: name: Yung, Alison.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Techno-Economic Analysis of Utility Scale PV Power Plants with Up to +/-1500 VDC
Creators: name: Malachi, R.
name: Schönberger, S.
name: Mayer, J.
name: Kasemann, M.
Publisher: name: WIP
Year: 2014
Subjects: OPERATIONS, PERFORMANCE AND RELIABILITY OF PHOTOVOLTAICS (from Cells to Systems)
Operation of PV Systems and Plants

description: 29th European Photovoltaic Solar Energy Conference and Exhibition; 2323-2326
description: Today most utility scale PV power plants have a system voltage of 1000 V and converter substations with around 1 MWp power. At the moment, the first 1500 VDC photovoltaic modules are entering the market. In order to reduce the cost, it seems promising to increase the DC voltage level of the plant and the maximum power of the converter substations which decreases the total cable length and the number of converter substations in the plant. In this work the cost of different PV power plant layouts at high DC voltage levels were determined. Four different concepts were worked out, firstly a 1000 VDC (state of the art), secondly a 1500 VDC (state of the art with increased voltage), thirdly a topology for a 2-stage concept with fixed voltage link and fourthly a bipolar PV-Generator. The most significant conclusion from this study was the 30% lower Balance of system (BOS) costs and subsequent savings in Levelized Cost of Electricity achieved from the power plant concepts with higher system voltage compared to the state of the art. With continuous fall in module and inverter prices, the BOS cost cut will be of greater significance in the near future. Further an analysis of potentail savings in PV system oriented in the East West compared to regular South facing plants was made. It shows that this is not recomanded for utility scale power plants due to lower energy harvest specialy in the winter season.
A scanning drift tube apparatus for spatio-temporal mapping of electron swarms
Creators: name: Korolov, I.
name: Vass, M.
name: Bastykova, N. Kh.
name: Donko, Z.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: A "scanning" drift tube apparatus, capable of mapping of the spatio-temporal evolution of electron swarms, developing between two plane electrodes under the effect of a homogeneous electric field, is presented. The electron swarms are initiated by photoelectron pulses and the temporal distributions of the electron flux are recorded while the electrode gap length (at a fixed electric field strength) is varied. Operation of the system is tested and verified with argon gas, the measured data are used for the evaluation of the electron bulk drift velocity. The experimental results for the space-time maps of the electron swarms - presented here for the first time - also allow clear observation of deviations from hydrodynamic transport. The swarm maps are also reproduced by particle simulations.