cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Cooling dynamics of droplets exposed to solid surface freezing and vitrification
Creators: name: Liu, Dejia
name: Oldenhof, Harriëtte
name: Luo, Xing
name: Braun, Tobias
name: Sieme, Harald
name: Wolkers, Willem F.
Publisher: name: Amsterdam [u.a.] : Elsevier
Year: 2024
Subjects: subject: Cryopreservation
subject: Droplet generation
subject: Numerical simulation
subject: Red blood cells
subject: Solid surface vitrification/freezing
subject: Vitrification
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: Solid surface freezing or vitrification (SSF/SSV) can be done by depositing droplets of a sample, e.g., cells in a preservation solution, onto a pre-cooled metal surface. It is used to achieve higher cooling rates and concomitant higher cryosurvival rates compared to immersion of samples into liquid nitrogen. In this study, numerical simulations of SSF/SSV were conducted by modeling the cooling dynamics of droplets of cryoprotective agent (CPA) solutions. It was assumed that deposited droplets attain a cylindrical bottom part and half-ellipsoidal shaped upper part. Material properties for heat transfer simulations including density, heat capacity and thermal conductivity were obtained from the literature and extrapolated using polynomial fitting. The impact of CPA type, i.e., glycerol (GLY) and dimethyl sulfoxide (DMSO), CPA concentration, and droplet size on the cooling dynamics was simulated at different CPA mass fractions at temperatures ranging from −196 to 25 °C. Simulations show that glycerol solutions cool faster compared to DMSO solutions, and cooling rates increase with decreasing CPA concentration. However, we note that material property data for GLY and DMSO solutions were obtained in different temperature and concentration ranges under different conditions, which complicated making an accurate comparison. Experimental studies show that samples that freeze have a delayed cooling response early on, whereas equilibration times are similar compared to samples that vitrify. Finally, as proof of concept, droplets of human red blood cells (RBCs) were cryopreserved using SSV/SSF comparing the effect of GLY and DMSO on cryopreservation outcome. At 20% (w/w), similar hemolysis rates were found for GLY and DMSO, whereas at 40%, GLY outperformed DMSO.
$k$-Anonymity in Practice: How Generalisation and Suppression Affect Machine Learning Classifiers
Creators: name: Slijepčević, Djordje
name: Henzl, Maximilian
name: Klausner, Lukas Daniel
name: Dam, Tobias
name: Kieseberg, Peter
name: Zeppelzauer, Matthias
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: The protection of private information is a crucial issue in data-driven research and business contexts. Typically, techniques like anonymisation or (selective) deletion are introduced in order to allow data sharing, e. g. in the case of collaborative research endeavours. For use with anonymisation techniques, the $k$-anonymity criterion is one of the most popular, with numerous scientific publications on different algorithms and metrics. Anonymisation techniques often require changing the data and thus necessarily affect the results of machine learning models trained on the underlying data. In this work, we conduct a systematic comparison and detailed investigation into the effects of different $k$-anonymisation algorithms on the results of machine learning models. We investigate a set of popular $k$-anonymisation algorithms with different classifiers and evaluate them on different real-world datasets. Our systematic evaluation shows that with an increasingly strong $k$-anonymity constraint, the classification performance generally degrades, but to varying degrees and strongly depending on the dataset and anonymisation method. Furthermore, Mondrian can be considered as the method with the most appealing properties for subsequent classification.
description: 48 pages, 38 figures
Time-to-Label: Temporal Consistency for Self-Supervised Monocular 3D Object Detection
Creators: name: Mouawad, Issa
name: Brasch, Nikolas
name: Manhardt, Fabian
name: Tombari, Federico
name: Odone, Francesca
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Monocular 3D object detection continues to attract attention due to the cost benefits and wider availability of RGB cameras. Despite the recent advances and the ability to acquire data at scale, annotation cost and complexity still limit the size of 3D object detection datasets in the supervised settings. Self-supervised methods, on the other hand, aim at training deep networks relying on pretext tasks or various consistency constraints. Moreover, other 3D perception tasks (such as depth estimation) have shown the benefits of temporal priors as a self-supervision signal. In this work, we argue that the temporal consistency on the level of object poses, provides an important supervision signal given the strong prior on physical motion. Specifically, we propose a self-supervised loss which uses this consistency, in addition to render-and-compare losses, to refine noisy pose predictions and derive high-quality pseudo labels. To assess the effectiveness of the proposed method, we finetune a synthetically trained monocular 3D object detection model using the pseudo-labels that we generated on real data. Evaluation on the standard KITTI3D benchmark demonstrates that our method reaches competitive performance compared to other monocular self-supervised and supervised methods.
Constraints on interacting dark energy models from time-delay cosmography with seven lensed quasars
Creators: name: Wang, Ling-Feng
name: Zhang, Jie-Hao
name: He, Dong-Ze
name: Zhang, Jing-Fei
name: Zhang, Xin
Publisher: name: arXiv
Year: 2021
Subjects: 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: Measurements of time-delay cosmography of lensed quasars can provide an independent probe to explore the expansion history of the late-time Universe. In this paper, we employ the time-delay cosmography measurements from seven lenses (here abbreviated as the TD data) to constrain interacting dark energy (IDE) models. We mainly focus on the scenario of vacuum energy (with $w=-1$) interacting with cold dark matter, and consider four typical cases of the interaction form $Q$. When the TD data alone are employed, we find that the IDE models with $Q\propto ρ_{\rm de}$ seem to have an advantage in relieving the $H_{0}$ tension between the cosmic microwave background (CMB) and TD data. When the TD data are added to the CMB$+$BAO$+$SN$+H_0$ data, we find that: (i) the coupling parameter $β$ in all the considered IDE models is positive within 1$σ$ range, implying a mild preference for the case of cold dark matter decaying into dark energy; (ii) the IDE model with $Q = βH_{0} ρ_{\rm c}$ slightly relieves the $S_8$ tension, but the other considered IDE models further aggravate this tension; (iii) the Akaike information criteria of the IDE models with $Q \propto ρ_{\rm c}$ are lower than that of the $Λ$CDM model, indicating that these IDE models are more preferred by the current mainstream data. We conclude that the considered IDE models have their own different advantages when the TD data are employed, and none of them can achieve good scores in all aspects.
description: 8 pages, 3 figures
Analysis of the possibilities of manufacturing parts of the spacecraft separeting unit using the additive technology
Creators: name: Tkachov, Yurii
name: Isaev, M. G.
Publisher: name: figshare
Year: 2022
Subjects: subject: Aerospace Engineering
subject: FOS: Mechanical engineering
subject: 90102 Aerospace Materials
subject: 90103 Aerospace Structures

description: Manufacturing spacecraft assemblies is a rather laborious and expensive process. The same can be said about the spacecraft separating unit. Nowadays before the lunching a launch vehicle with a payload, one of the main questions is to choose the best way to separate the spacecraft from the lunch vehicle. The choice of the required method depends on a number of factors: the type and properties of the spacecraft, the method of separation (spring pusher, squib, etc.), reliability, smoothness and accuracy of separation and of course the price of the chosen method.
Coupled cluster and perturbation theories based on a cluster mean-field reference applied to strongly correlated spin systems
Creators: name: Papastathopoulos-Katsaros, Athanasios
name: Jiménez-Hoyos, Carlos A.
name: Henderson, Thomas M.
name: Scuseria, Gustavo E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We introduce perturbation and coupled-cluster theories based on a cluster mean-field reference for describing the ground state of strongly-correlated spin systems. In cluster mean-field, the ground state wavefunction is written as a simple tensor product of optimized cluster states. The cluster language and the mean-field nature of the ansatz allows for a straightforward improvement which uses perturbation theory and coupled-cluster to account for inter-cluster correlations. We present benchmark calculations on the 1D chain and 2D square $J_1-J_2$ Heisenberg model, using cluster mean-field, perturbation theory and coupled-cluster. We also present an extrapolation scheme that allows us to compute thermodynamic limit energies accurately. Our results indicate that, with sufficiently large clusters, the correlated methods (cPT2, cPT4 and cCCSD) can provide a relatively accurate description of the Heisenberg model in the regimes considered, which suggests that the methods presented can be used for other strongly-correlated systems. Some ways to improve upon the methods presented in this work are discussed.
Spectral Properties of the Dirac Operator coupled with $δ$-Shell Interactions
Creators: name: Benhellal, Badreddine
Publisher: name: arXiv
Year: 2021
Subjects: subject: Spectral Theory (math.SP)
subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 81Q10, 81V05, 35P15, 58C40

description: Let $Ω\subset\mathbb{R}^3$ be an open set, we study the spectral properties of the free Dirac operator $\mathcal{H}$ coupled with the singular potential $V_κ=(εI_4 +μβ+η(α\cdot N))δ_{\partialΩ}$. The open set $Ω$ can be either a $\mathcal{C}^2$-bounded domain or a locally deformed half-space. In both cases, self-adjointness is proved and several spectral properties are given. In particular, we give a complete description of the essential spectrum of $\mathcal{H}+V_κ$ for the so-called critical combinations of coupling constants, when $Ω$ is a locally deformed half-space. Finally, we introduce a new model of Dirac operators with $δ$-interactions and deals with its spectral properties. More precisely, we study the coupling $\mathcal{H}_{\upsilon}=\mathcal{H}+i\upsilonβ(α\cdot N)δ_{\partialΩ}$. In particular, we show that $\mathcal{H}_{\pm2}$ is essentially self-adjoint and generates confinement.
description: This article corresponds to the first part of the article arXiv:2102.10207. In this version we corrected many typos and errors
Bounded weak and strong time periodic solutions to a three-dimensional chemotaxis-Stokes model with porous medium diffusion
Creators: name: Ye, Hailong
name: Jin, Chunhua
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 92C17, 35B10, 35M10

description: In this paper, we study the time periodic problem to a three-dimensional chemotaxis-Stokes model with porous medium diffusion $Δn^m$ and inhomogeneous mixed boundary conditions. By using a double-level approximation method and some iterative techniques, we obtain the existence and time-space uniform boundedness of weak time periodic solutions for any $m>1$. Moreover, we improve the regularity for $m\le\frac{4}{3}$ and show that the obtained periodic solutions are in fact strong periodic solutions.
Sonnenfleckenzeichnung Nr. 4618.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 03.07.1954, erstellt als Beobachtung im Projektionsverfahren Nr. 2688 von Karl Rapp in Locarno-Monti
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1954

description: Bleistiftzeichnung mit Tinte und Farbstift, erstellt für die Beobachtungen in Locarno-Monti auf dem Vordruck der Eidgenössischen Sternwarte Zürich. Instrument: Merz-Refraktor mit 13.5 cm Öffnung und 195 cm Brennweite, vereinzelt andere Instrumente wie Tel. 88x; Sonnenbild D = 25 cm. - Auf der Zeichnung wird zum Teil das Instrument vermerkt bzw. die Zählung der Beobachtungen im Projektionsverfahren fortgesetzt. Sporadisch sind Resultate mehrerer Aufnahmen pro Tag aufgelistet. Zuhanden der späteren statistischen Verarbeitung sind die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Zeichnung aus der Zeit der Beobachtertätigkeit von Ing. Karl Rapp als Privat-Astronom, die er seit den Neunzehnvierziger Jahren für die Eidgenössische Sternwarte Zürich ausführte. Aus den ersten zwei Jahren der freiwilligen Mitarbeit sind nur einzelne Stücke überliefert. Erst zwei Jahre später ist jeweils eine ergänzende Serie in Zürich aufbewahrt worden. Nochmals fünf Jahre später arbeitete Karl Rapp neu auf vertraglicher Basis weiter mit, bis schliesslich nach einem weiteren Jahrzehnt die permanente Beobachtungsstation in Locarno-Monti geschaffen wurde, welche an die langjährige Serie von Karl Rapp anknüpfte
Mobile Access Control System Based on RFID Tags And Facial Information
Creators: name: Khabarlak, Kostiantyn
name: Koriashkina, Larysa
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Better access control system security comes at a higher price. It many cases the price is too high for small companies, leaving them vulnerable with cheap and insecure systems. In this work we introduce an alternative access control scheme, which improves access control security while lowering the cost. In the proposed model, passive RFID tags are mounted near a turnstile or a smart door. Tag reading and programming is done via NFC chip directly on the users smartphone. To enhance security, together with smartphone-based authorization we require the user to provide his photograph while entering a secure gate. The photograph is then displayed on a monitoring dashboard side-by-side with the registration picture, so that the two can be matched against each other. The developed client-server application offers administrative system used to configure gate access policies and monitor entrances with filters by access time, user and gate. Also, we propose a mobile application that allows gate registration and serves as a door unlock key. The suggested access control model reduces installation costs required, while maintaining good security. The system is fully wireless and uses cheap autonomous RFID-tags as its main component. We hope, that the proposed system architecture will find its application in small to medium-sized companies.
Sonnenfleckenzeichnung Nr. 171.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 16.07.1968, erstellt von Araldo Pittini, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1968

description: Bleistiftzeichnung mit Tinte und Farbstift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf dem Vordruck der Eidgenössischen Sternwarte Zürich. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert
title: Megathrust shear force limits mountain height at convergent plate boundaries
Creators: name:  Dielforder ,  Armin
name:  Hetzel ,  Ralf
name:  Oncken ,  Onno
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2021

description: The shear force along convergent plate boundary faults (megathrusts) determines the height of mountain ranges that can be mechanically sustained. Whether the true height of mountain ranges corresponds to this tectonically supported elevation is, however, debated. In particular, climate-dependent erosional processes are often assumed to exert a major control on mountain height, although this assumption has remained difficult to validate. To address this issue, we first constrained the shear force along active megathrusts from their rheological properties and then determined the tectonically supported elevation using a force balance model. This analysis revealed that the height of mountain ranges around the globe matches the tectonically supported elevation, irrespective of climatic conditions and the rate of erosion. This finding indicates that the height of mountain ranges is effectively limited by the megathrust shear force and implies that global differences in mountain height are at first-order tectonically controlled. Temporal variations in mountain height should therefore reflect long-term changes in the overall force balance rather than changes in climate and erosion.
Dirac Fermion Cloning, Moir$\bf{é}$ Flat Bands and Magic Lattice Constants in Epitaxial Monolayer Graphene
Creators: name: Lu, Qiangsheng
name: Chiu, Ching-Kai
name: Le, Congcong
name: Cook, Jacob
name: Zhang, Xiaoqian
name: He, Xiaoqing
name: Zarenia, Mohammad
name: Vaninger, Mitchel
name: Miceli, Paul F.
name: Liu, Chang
name: Chiang, Tai-Chang
name: Vignale, Giovanni
name: Bian, Guang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Tuning interactions between Dirac states in graphene has attracted enormous interest because it can modify the electronic spectrum of the two-dimensional material, enhance electron correlations, and give rise to novel condensed-matter phases such as superconductors, Mott insulators, Wigner crystals and quantum anomalous Hall insulators. Previous works predominantly focus on the flat band dispersion of coupled Dirac states from different graphene layers. In this work, we propose a new route to realizing flat band physics in monolayer graphene under a periodic modulation from substrates. We take gaphene/SiC heterostructure as a role model and demonstrate experimentally the substrate modulation leads to Dirac fermion cloning and consequently, the proximity of the two Dirac cones of monolayer graphene in momentum space. Our theoretical modeling captures the cloning mechanism of Dirac states and indicates that flat bands can emerge at certain magic lattice constants of substrate when the period of modulation becomes nearly commensurate with the $(\sqrt{3}\times\sqrt{3})R30^{\circ}$ supercell of graphene. The results show that the epitaxial monolayer graphene is a promising platform for exploring exotic many-body quantum phases arising from interactions between Dirac electrons.
Hard ferromagnetism down to the thinnest limit of iron-intercalated tantalum disulfide
Creators: name: Husremović, Samra
name: Inzani, Katherine
name: Groschner, Catherine K.
name: Craig, Isaac M.
name: Bustillo, Karen C.
name: Ercius, Peter
name: Kazmierczak, Nathanael P.
name: Syndikus, Jacob
name: Van Winkle, Madeline
name: Aloni, Shaul
name: Taniguchi, Takashi
name: Watanabe, Kenji
name: Griffin, Sinéad M.
name: Bediako, D. Kwabena
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Two-dimensional (2D) magnetic crystals hold promise for miniaturized and ultralow power electronic devices that exploit spin manipulation. In these materials, large, controllable magnetocrystalline anisotropy is a prerequisite for the stabilization and manipulation of long-range magnetic order. In known 2D magnetic crystals, relatively weak magnetocrystalline anisotropy results in typically soft ferromagnetism. Here, we demonstrate that ferromagnetic order persists down to the thinnest limit of Fe$_x$TaS$_2$ (Fe-intercalated bilayer 2H-TaS$_2$) with giant coercivities up to 3 tesla. We prepare Fe-intercalated TaS$_2$ by chemical intercalation of van der Waals layered 2H-TaS$_2$ crystals and perform variable-temperature quantum transport, transmission electron microscopy, and confocal Raman spectroscopy measurements to shed new light on the coupled effects of dimensionality, degree of intercalation, and intercalant order/disorder on the hard ferromagnetic behavior of Fe$_x$TaS$_2$. More generally, we show that chemical intercalation gives access to a rich synthetic parameter space for low-dimensional magnets, in which magnetic properties can be tailored by the choice of the host material and intercalant identity/amount, in addition to the manifold distinctive degrees of freedom available in atomically thin, van der Waals crystals.
Brief an Matthias Erb
Creators: name: Taurus, Sigismund
Publisher: name: [s.n.]
Year: 1542

description: von Sigis[mund] Taurus
description: Öffentliche Bibliothek der Universität Basel
description: Lateinisch
description: Verzeichnung=Description=Inventaire Januar 2018 HAN-Katalogisierungsregeln Vollständige Rekatalogisierung nach Standortverzeichnis, Briefkatalog und Original
Sterile neutrino rates for general $M$, $T$, $μ$, $k$: review of a theoretical framework
Creators: name: Laine, M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The temperature of sphaleron freeze-out, $T\approx 130$ GeV, sets a scale for mechanisms for generating lepton asymmetries and converting them to baryon asymmetry (leptogenesis). For Majorana masses $M \gg πT$, leptogenesis takes place in the non-relativistic regime, while for $M \ll πT$, the dynamics is ultrarelativistic. The intermediate case $M \sim πT$ is the most cumbersome, as no effective theory methods are available. We review the definitions of and provide integral representations for all rate coefficients and mass corrections of $\mathcal{O}(h_ν^2)$ in this regime, such that the expressions extrapolate to known limits and are gauge independent to the order computed, both in the symmetric and the Higgs phase, for any helicity, momentum, and set of chemical potentials. Road signs towards a numerical evaluation are offered.
description: 36 pages. v2: minor fixes, published version
Different Environmental Conditions in Genetic Algorithm
Creators: name: Lee, Daekyung
name: Kim, Beom Jun
Publisher: name: arXiv
Year: 2021
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: We propose an extended genetic algorithm (GA) with different local environmental conditions. Genetic entities, or configurations, are put on nodes in a ring structure, and location-dependent environmental conditions are applied for each entity. Our GA is motivated by the geographic aspect of natural evolution: Geographic isolation reduces the diversity in a local group, but at the same time, can enhance intergroup diversity. Mating of genetic entities across different environments can make it possible to search for broad area of the fitness landscape. We validate our extended GA for finding the ground state of three-dimensional spin-glass system and find that the use of different environmental conditions makes it possible to find the lower-energy spin configurations at relatively shorter computation time. Our extension of GA belongs to a meta-optimization method and thus can be applied for a broad research area in which finding of the optimal state in a shorter computation time is the key problem.
description: 14 pages, 4 figures
Brief an Matthias Erb
Creators: name: Fontenus, Irenhartus
Publisher: name: [s.n.]
Year: 1550

description: von Irenhartus Fontenus
description: Öffentliche Bibliothek der Universität Basel
description: Lateinisch
description: Verzeichnung=Description=Inventaire Januar 2018 HAN-Katalogisierungsregeln Vollständige Rekatalogisierung nach Standortverzeichnis, Briefkatalog und Original
Environmental impacts of different single-use and multi-use packaging systems for fresh fish export
Creators: name: Hilmarsdóttir, Guorun Svana
name: Margeirsson, Bjorn
name: Spierling, Sebastian
name: Ögmundarson, Olafur
Publisher: name: Amsterdam [u.a.] : Elsevier Science
Year: 2024
Subjects: subject: Expanded polystyrene
subject: Fish packaging
subject: Life-cycle assessment
subject: Multi-use tub
subject: Polyethylene
subject: Single-use box
subject: Dewey Decimal Classification::600 | Technik::690 | Hausbau, Bauhandwerk
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::330 | Wirtschaft

description: The production and pollution of plastic present a significant threat to global ecosystems, where annual plastic emissions in aquatic ecosystems are projected to triple between 2020 and 2030. Currently, plastics are widely used for food packaging but depending on the polymers, properties, the recyclability ratio of the plastics varies. Polymers, such as polyethylene (PE), polyurethane (PUR), and expanded polystyrene (EPS), are widely used for packaging and transporting foods such as fresh fish, where multi-use fish tubs often consist of PE and/or PUR and single-use boxes of EPS. This study evaluated the environmental impacts of reusable tubs of different volumes and sizes made of PE/PUR vs single-use EPS boxes, transporting 1000 tons (T) of fresh fish from Iceland to Europe, per year based on life cycle assessment methodology. This is to identify the packaging solution with the lowest environmental impact. The overall results show that multi-use tubs had lower environmental impacts when transporting 1000 T of fresh fish from Iceland to Europe per year, even during first year of usage. For Global warming impacts, producing and using EPS boxes for transporting 1000 T of fresh fish was 141 T CO2-eq and ranged from 4 to 46 T CO2-eq for variating multi-use packaging solutions for one year. The weight of the raw materials (plastics) and size of the tubs were key factors affecting the environmental impacts when transporting the tubs.
title: Reconstruction of Miocene geodynamics in the Central Alps using detrital garnet geochemistry in sandstones of the Swiss foreland basin
Creators: name:  Krieg ,  Daniela
name:  Stutenbecker ,  Laura
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2021

description: The geodynamics in the Central Alps during the Miocene were majorly characterized by the exhumation of crystalline basement, the so-called external crystalline massifs. Their exhumation had a major impact on the evolution of relief, distribution of drainage networks and sediment-generation. The timing of their first surficial exposure and their total thickness still remains debated. The Swiss Molasse Basin contains ~35 to 13 Ma old clastic deposits that were mostly derived from the immediate hinterland and contain valuable information about its tectonic and climatic evolution. For this thesis, this sedimentary archive is used to trace the exhumation of the external crystalline massifs. In particular detrital garnet geochemistry is used to investigate 21.8 to 15 Ma old alluvial fan deposits of three different fan systems of the Swiss Molasse Basin. In this context, unusually grossular- and spessartine-rich garnets supplied from greenschist-facies metamorphic granitoid rocks serve as a unique proxy for the sediment supply from the external crystalline massifs. Their first appearance in a 15 Ma old sample in the Napf Fan indicates an at least partial exposure to the surface at that time. These garnets can neither be found in the alluvial fans to the east nor to the west, suggesting a relatively stable N/NW-directed drainage system since Miocene times. Another species of extremely grossular-rich garnets of so far unknown provenance has been found in 16.5-17 Ma sandstone of the Napf Fan, indicating a highly dynamic hinterland evolution during the Miocene, which is contrasting previous findings based on more traditional provenance proxies.
Kerr and Faraday rotations in topological flat and dispersive band structures
Creators: name: Habibi, Alireza
name: Musthofa, Ahmad Z.
name: Adibi, Elaheh
name: Ekström, Johan
name: Schmidt, Thomas L.
name: Hasdeo, Eddwi H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Integer quantum Hall (IQH) states and quantum anomalous Hall (QAH) states show the same static (dc) response but distinct dynamical (ac) response. In particular, the ac anomalous Hall conductivity profile $σ_{yx}(ω)$ is sensitive to the band shape of QAH states. For example, dispersive QAH bands shows resonance profile without a sign change at the band gap while the IQH states shows the sign change resonance at the cyclotron energy. We argue by flattening the dispersive QAH bands, $σ_{yx}(ω)$ should recover to that of flat Landau bands in IQH, thus it is necessary to know the origin of the sign change. Taking a topological lattice model with tunable bandwidth, we found that the origin of the sign change is not the band gap but the Van Hove singularity energy of the QAH bands. In the limit of small bandwidth, the flat QAH bands recovers $σ_{yx}(ω)$ of the IQH Landau bands. Because of the Hall response, these topological bands exhibit giant polarization rotation and ellipticity in the reflected waves (Kerr effect) and rotation in the order of fine structure constant in the transmitted waves (Faraday effect) with profile resembles $σ_{yx}(ω)$. Our results serve as a simple guide to optical characterization for topological flat bands.
description: 10 pages, 4 figures
Construction of novel Ru-embedded bulk g-C3N4 photocatalysts toward efficient and sustainable photocatalytic hydrogen production
Creators: name: Ismael, Mohammed
Publisher: name: Amsterdam [u.a.] : Elsevier Science
Year: 2024
Subjects: subject: Bulk g-C N 3 4
subject: Interfacial charge separation
subject: Photocatalysis
subject: Ru-embedded photocatalysts
subject: Sustainable hydrogen production
subject: Dewey Decimal Classification::500 | Naturwissenschaften::550 | Geowissenschaften
subject: Dewey Decimal Classification::600 | Technik::670 | Industrielle und handwerkliche Fertigung

description: Novel Ru-embedded bulk graphitic carbon nitride (g-C3N4) photocatalysts containing different wt% of Ru (0.5–2 % wt) were synthesized by a simple mixing method of ruthenium complex with g-C3N4. The photocatalytic activity of the synthesized photocatalysts was assessed for hydrogen production in an aqueous solution containing methanol with and without Pt. The optimal hydrogen production rate of the most active photocatalyst (0.8 % Ru/CN) was 246 μmol/h without Pt and 1021 μmol/h with Pt, which was more than two times higher than pure g-C3N4. Various physiochemical techniques such as X-ray diffraction (XRD), N2 adsorption-desorption isotherms, transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV–vis diffuse reflectance spectroscopy (UV–vis DRS), photoluminescence spectroscopy (PL) and transition photocurrent response (PC) were applied to investigate the origin of activity of the Rux/CN photocatalysts. Results indicated that the loading of g-C3N4 with Ru nanoparticles enlarged its surface area and enhanced visible light absorption. Importantly, Ru nanoparticles promoted the charge carrier separation and transfer efficiency of g-C3N4 revealed by the PL and PC measurements, enhancing the photocatalytic activity of the embedded photocatalyst. Furthermore, XPS proved the existence of Ru (II) of RuO2 and metallic Ru0. The Ru-embedded g-C3N4 showed high photocatalytic activity, which makes them attractive materials for further applications in photocatalysis.
Brief an Matthias Erb
Creators: name: Taurus, Sigismund
Publisher: name: [s.n.]
Year: 1541

description: von S[igismund] Taurus
description: Öffentliche Bibliothek der Universität Basel
description: Lateinisch
description: Verzeichnung=Description=Inventaire Januar 2018 HAN-Katalogisierungsregeln Vollständige Rekatalogisierung nach Standortverzeichnis, Briefkatalog und Original
Feedback as a space for academic social practice in doctoral writing groups
Creators: name: Chakraborty, Deya
name: Soyoof, Ali
name: Moharami, Mehdi
name: Utami, Ade Dwi
name: Zeng, Shaoru
name: Cong-Lem, Ngo
name: Hradsky, Danielle
name: Maestre, Jacky-Lou
name: Foomani, Elham Mohammadi
name: Pretorius, Lynette
Publisher: name: Monash University
Year: 2024
Subjects: classificationCode: 390303
subject: Higher education

description: ObjectiveWhile academic writing is considered a core competency in academia, academic writing anxiety is ubiquitous in doctoral student cohorts. Doctoral writing groups provide a space for participants to learn from each other’s writing through the peer feedback process. In this conceptual review, we explore the dialogic nature of the peer feedback process in doctoral writing groups.
MethodsThe findings in this study are based on thematic analyses of published peer-reviewed research using standard word processing, annotation, and referencing software.
ResultsWe focus on how the space of security and trust that is created in doctoral writing groups encourages participants to explore writing as a social practice. Through the relationships built in this type of interactive community, doctoral writing group participants discover and explore the discourses of scholarly communication. Furthermore, doctoral writing groups foster students’ ability to navigate the often-times implicit narratives of academia, thereby building student agency.
ConclusionWe argue, therefore, that feedback in doctoral writing groups should be viewed as a space of academic social practice.
ImplicationsThis study underscores the importance of embedding opportunities for peer-based learning into doctoral programmes not only in the fields of educational and developmental psychology, but also in other disciplines more broadly.
KEY POINTS(1) Academic writing is an essential skill for PhD graduates.(2) Academic writing anxiety is ubiquitous in PhD student cohorts.(3) Doctoral writing groups provide spaces for PhD students to develop their academic writing.(4) Learning in doctoral writing groups occur through a dialogic peer feedback process.(5) Doctoral writing groups encourage PhD students to see writing as a social practice.(6) Doctoral writing groups foster the agency of PhD students by helping them navigate the implicit narratives of academia.
Bayesian Estimation of Graph Signals
Creators: name: Kroizer, Ariel
name: Routtenberg, Tirza
name: Eldar, Yonina C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We consider the problem of recovering random graph signals from nonlinear measurements. For this case, closed-form Bayesian estimators are usually intractable and even numerical evaluation of these estimators may be hard to compute for large networks. In this paper, we propose a graph signal processing (GSP) framework for random graph signal recovery that utilizes the information of the structure behind the data. First, we develop the GSP-linear minimum mean-squared-error (GSP-LMMSE) estimator, which minimizes the mean-squared error (MSE) among estimators that are represented as an output of a graph filter. The GSP-LMMSE estimator is based on diagonal covariance matrices in the graph frequency domain, and thus, has reduced complexity compared with the LMMSE estimator. This property is especially important when using the sample-mean versions of these estimators that are based on a training dataset. We then state conditions under which the low-complexity GSP-LMMSE estimator coincides with the optimal LMMSE estimator. Next, we develop the approximated parametrization of the GSP-LMMSE estimator by shift-invariant graph filters by solving a weighted least squared (WLS) problem. We present three implementations of the parametric GSP-LMMSE estimator for typical graph filters. Parametric graph filters are more robust to outliers and to network topology changes. In our simulations, we evaluate the performance of the proposed GSP-LMMSE estimators for the problem of state estimation in power systems, which can be interpreted as a graph signal recovery task. We show that the proposed sample-GSP estimators outperform the sample-LMMSE estimator for a limited training dataset and that the parametric GSP-LMMSE estimators are more robust to topology changes in the form of adding/removing vertices/edges.
title: Renal Lymphangiectasia
Creators: name: Nguyen, Tung
Publisher: name: EURORAD
Year: 2022
Subjects: subject: Uroradiology & genital male imaging
subject: Abdomen
subject: Kidney
subject: CT
subject: Dilatation
subject: Clinical Cases

description: Clinical History: A 25-year-old woman presented with vague left flank discomfort for 2 months. No history of other urinary symptoms. The laboratory results, including complete blood counts, renal function parameters, serum electrolytes, and urinalysis were within the normal range.

description: 25 years, female
Sonnenfleckenzeichnung Nr. 4647.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 01.08.1954, erstellt als Beobachtung im Projektionsverfahren Nr. 2716 von Karl Rapp in Locarno-Monti
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1954

description: Bleistiftzeichnung mit Tinte und Farbstift, erstellt für die Beobachtungen in Locarno-Monti auf dem Vordruck der Eidgenössischen Sternwarte Zürich. Instrument: Merz-Refraktor mit 13.5 cm Öffnung und 195 cm Brennweite, vereinzelt andere Instrumente wie Tel. 88x; Sonnenbild D = 25 cm. - Auf der Zeichnung wird zum Teil das Instrument vermerkt bzw. die Zählung der Beobachtungen im Projektionsverfahren fortgesetzt. Sporadisch sind Resultate mehrerer Aufnahmen pro Tag aufgelistet. Zuhanden der späteren statistischen Verarbeitung sind die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Zeichnung aus der Zeit der Beobachtertätigkeit von Ing. Karl Rapp als Privat-Astronom, die er seit den Neunzehnvierziger Jahren für die Eidgenössische Sternwarte Zürich ausführte. Aus den ersten zwei Jahren der freiwilligen Mitarbeit sind nur einzelne Stücke überliefert. Erst zwei Jahre später ist jeweils eine ergänzende Serie in Zürich aufbewahrt worden. Nochmals fünf Jahre später arbeitete Karl Rapp neu auf vertraglicher Basis weiter mit, bis schliesslich nach einem weiteren Jahrzehnt die permanente Beobachtungsstation in Locarno-Monti geschaffen wurde, welche an die langjährige Serie von Karl Rapp anknüpfte
CutFEM and ghost stabilization techniques for higher order space-time discretizations of the Navier-Stokes equations
Creators: name: Anselmann, Mathias
name: Bause, Markus
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: We propose and analyze computationally a new fictitious domain method, based on higher order space-time finite element discretizations, for the simulation of the nonstationary, incompressible Navier-Stokes equations on evolving domains. The physical domain is embedded into a fixed computational mesh such that arbitrary intersections of the moving domain's boundaries with the background mesh occur. The potential of such cut finite element techniques for higher order space-time finite element methods has rarely been studied in the literature so far and deserves further elucidation. The key ingredients of the approach are the weak formulation of Dirichlet boundary conditions by Nitsche's method, the flexible and efficient integration over all types of intersections of cells by moving boundaries and the spatial extension of the discrete physical quantities to the entire computational background mesh including fictitious (ghost) subdomains of fluid flow. Thereby, an expensive remeshing and adaptation of the sparse matrix data structure are avoided and the computations are accelerated. To prevent spurious oscillations caused by irregular intersections of mesh cells, a penalization, defining also implicitly the extension to ghost domains, is added. These techniques are embedded in an arbitrary order, discontinuous Galerkin discretization of the time variable and an inf-sup stable discretization of the spatial variables. The parallel implementation of the matrix assembly is described. The optimal order convergence properties of the algorithm are illustrated in a numerical experiment for an evolving domain. The well-known 2d benchmark of flow around a cylinder as well as flow around moving obstacles with arising cut cells and fictitious domains are considered further.
Brief an Matthias Erb
Creators: name: Taurus, Sigismund
Publisher: name: [s.n.]
Year: 1543

description: von Sigis[mund] Taurus
description: Öffentliche Bibliothek der Universität Basel
description: Lateinisch
description: Verzeichnung=Description=Inventaire Januar 2018 HAN-Katalogisierungsregeln Vollständige Rekatalogisierung nach Standortverzeichnis, Briefkatalog und Original
Geometry of Banach spaces: a new route towards Position Based Cryptography
Creators: name: Junge, Marius
name: Kubicki, Aleksander M.
name: Palazuelos, Carlos
name: Pérez-García, David
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In this work we initiate the study of Position Based Quantum Cryptography (PBQC) from the perspective of geometric functional analysis and its connections with quantum games. The main question we are interested in asks for the optimal amount of entanglement that a coalition of attackers have to share in order to compromise the security of any PBQC protocol. Known upper bounds for that quantity are exponential in the size of the quantum systems manipulated in the honest implementation of the protocol. However, known lower bounds are only linear. In order to deepen the understanding of this question, here we propose a Position Verification (PV) protocol and find lower bounds on the resources needed to break it. The main idea behind the proof of these bounds is the understanding of cheating strategies as vector valued assignments on the Boolean hypercube. Then, the bounds follow from the understanding of some geometric properties of particular Banach spaces, their type constants. Under some regularity assumptions on the former assignment, these bounds lead to exponential lower bounds on the quantum resources employed, clarifying the question in this restricted case. Known attacks indeed satisfy the assumption we make, although we do not know how universal this feature is. Furthermore, we show that the understanding of the type properties of some more involved Banach spaces would allow to drop out the assumptions and lead to unconditional lower bounds on the resources used to attack our protocol. Unfortunately, we were not able to estimate the relevant type constant. Despite that, we conjecture an upper bound for this quantity and show some evidence supporting it. A positive solution of the conjecture would lead to stronger security guarantees for the proposed PV protocol providing a better understanding of the question asked above.
description: Presentation substantially improved. A couple of sections were removed for the sake of conciseness and some clarifications added
Sonnenfleckenzeichnung Nr. 4628.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 13.07.1954, erstellt als Beobachtung im Projektionsverfahren Nr. 2698 von Karl Rapp in Locarno-Monti
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1954

description: Bleistiftzeichnung mit Tinte und Farbstift, erstellt für die Beobachtungen in Locarno-Monti auf dem Vordruck der Eidgenössischen Sternwarte Zürich. Instrument: Merz-Refraktor mit 13.5 cm Öffnung und 195 cm Brennweite, vereinzelt andere Instrumente wie Tel. 88x; Sonnenbild D = 25 cm. - Auf der Zeichnung wird zum Teil das Instrument vermerkt bzw. die Zählung der Beobachtungen im Projektionsverfahren fortgesetzt. Sporadisch sind Resultate mehrerer Aufnahmen pro Tag aufgelistet. Zuhanden der späteren statistischen Verarbeitung sind die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Zeichnung aus der Zeit der Beobachtertätigkeit von Ing. Karl Rapp als Privat-Astronom, die er seit den Neunzehnvierziger Jahren für die Eidgenössische Sternwarte Zürich ausführte. Aus den ersten zwei Jahren der freiwilligen Mitarbeit sind nur einzelne Stücke überliefert. Erst zwei Jahre später ist jeweils eine ergänzende Serie in Zürich aufbewahrt worden. Nochmals fünf Jahre später arbeitete Karl Rapp neu auf vertraglicher Basis weiter mit, bis schliesslich nach einem weiteren Jahrzehnt die permanente Beobachtungsstation in Locarno-Monti geschaffen wurde, welche an die langjährige Serie von Karl Rapp anknüpfte
Deep learning piston aberration control of fiber laser phased array by spiral phase modulation
Creators: name: Zuo, Jing
name: Jia, Haolong
name: Geng, Chao
name: Bao, Qiliang
name: Li, Feng
name: LI, ZIQIANG
name: Jiang, Jing
name: Xia, Yunxia
name: Zou, Fan
name: Li, Xinyang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The stochastic parallel gradient descent (SPGD) algorithm is usually employed as the control strategy for phase-locking in fiber laser phased array systems. However, the convergence speed of the SPGD algorithm will slow down as the number of array elements increases. To improve the control bandwidth, the convolutional neural network is introduced to quickly calculate the initial piston aberration in a single step. In addition, the irrationality of the commonly used Mean Square Error (MSE) evaluation function in existing convolutional neural networks is analyzed. A new evaluation function NPCD (Normalized Phase Cosine Distance) is proposed to improve the accuracy of the neural networks. The results show that the piston aberration residual is 0.005 and the power in the bucket (PIB) is 0.993 after accurate preliminary compensation, which means that the system directly enters the co-phase state. We also demonstrate the robustness and scalability by adding additional disturbance and expanding the scale of the array.