cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A photochemical model of Triton's atmosphere with an uncertainty propagation study
Creators: name: Benne, B.
name: Dobrijevic, M.
name: Cavalié, T.
name: Loison, J-C.
name: Hickson, K. M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Triton is the largest satellite of Neptune and probably a Kuiper Belt Object that was captured by the planet. It has a tenuous nitrogen atmosphere similar to the one of Pluto and may be an ocean world. The Neptunian system has only been visited by Voyager 2 in 1989. Over the last few years, the demand for a new mission to the Ice Giants and their systems has increased so that a theoretical basis to prepare for such a mission is important. We aim to develop a photochemical model of Triton's atmosphere with an up-to-date chemical scheme, as previous photochemical models date back to the post-flyby years. This is done to better understand the mechanisms governing Triton's atmospheric chemistry and highlight the critical parameters having a significant impact on the atmospheric composition. We also study model uncertainties to find what chemical studies are necessary to improve the modeling of Triton's atmosphere. We adapted a model of Titan's atmosphere to Triton's conditions. We first used Titan's chemical scheme before updating it to better model Triton's atmosphere. Once the nominal results were obtained, we studied model uncertainties with a Monte-Carlo procedure. Then, we performed global sensitivity analyzes to identify the reactions responsible for model uncertainties. With the nominal results, we determined the composition of Triton's atmosphere and studied the main chemical processes. We highlighted key chemical reactions that are the most important for the overall chemistry. We also identified some key parameters having a significant impact on the results. Uncertainties are large for most of the main atmospheric species as the atmospheric temperature is very low. We identified key uncertainty reactions that have the largest impact on the results uncertainties. These reactions must be studied in priority in order to improve the significance of our results.
description: 35 pages, 11 Figures, 7 Tables, 1 Appendix
title: Bauten jüdischer Dorfgemeinschaften im Kreis Ludwigsburg
Creators: name: Reinhardt, Brigitte
name: Weyrauch, Sabine
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 8, Nr. 2 (1979), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
title: Die Dienststellen des Landesdenkmalamtes
Creators: name: Redaktion, Die
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 8, Nr. 3 (1979), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Line and Plane based Incremental Surface Reconstruction
Creators: Ahmad, Junaid
Publisher: name: University of Alberta Library
Year: 2023

Simultaneous Localization and Mapping(SLAM) has been very popular in the

past and is gaining more traction in the era of autonomous vehicle research

and robot manipulation. Computing accurate surface models from sparse Visual SLAM 3D point clouds is difcult. There have been works where this

problem was addressed by space carving methods using map points and lines

generated by those points. These methods come with their own drawbacks

as point clouds and lines alone don’t add sufcient structural information to

the scene. In this thesis, we try to take the natural step to also compute

and verify 3D planes bottom-up from lines. Our system takes the real-time

stream of new cameras and 3D points from a SLAM system and incrementally

builds the 3D scene surface model. In previous work, 3D line segments were

detected in relevant keyframes and were fed to the modeling algorithm for

surface reconstruction. This method has an immediate drawback as some of

the line segments generated in every keyframe are redundant and mark similar objects(shifted) creating clutter in the map. To avoid this issue, we track

the 3D planes detected over keyframes for consistency and data association.

Furthermore, the smoother and better-aligned model surfaces result in more

photo-realistic rendering using keyframe texture images. Compared to other

incremental real-time surface reconstruction methods, our model has less than

half the triangles, and we achieve better metric reconstruction accuracy on the

EuRoC MAV Benchmarks. We also tested our method on various of-the-shelf

cameras for better generalization
To E or not to E: Numerical Nuances of Global Coronal Models
Creators: name: Brchnelova, Michaela
name: Kuźma, Błażej
name: Perri, Barbara
name: Lani, Andrea
name: Poedts, Stefaan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Computational Physics (physics.comp-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: Plasma Physics (physics.plasm-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: In the recent years, global coronal models have experienced an ongoing increase in popularity as tools for forecasting solar weather. Within the domain of up to 21.5Rsun, magnetohydrodynamics (MHD) is used to resolve the coronal structure using magnetograms as inputs at the solar surface. Ideally, these computations would be repeated with every update of the solar magnetogram so that they could be used in the ESA Modelling and Data Analysis Working Group (MADAWG) magnetic connectivity tool (http://connect-tool.irap.omp.eu/). Thus, it is crucial that these results are both accurate and efficient. While much work has been published showing the results of these models in comparison with observations, not many of it discusses the intricate numerical adjustments required to achieve these results. These range from details of boundary condition formulations to adjustments as large as enforcing parallelism between the magnetic field and velocity. By omitting the electric field in ideal-MHD, the description of the physics can be insufficient and may lead to excessive diffusion and incorrect profiles. We formulate inner boundary conditions which, along with other techniques, reduce artificial electric field generation. Moreover, we investigate how different outer boundary condition formulations and grid design affect the results and convergence, with special focus on the density and the radial component of the B-field. The significant improvement in accuracy of real magnetic map-driven simulations is illustrated for an example of the 2008 eclipse.
description: 28 pages, 26 figures, 3 tables, accepted for publication in ApJS
title: Rückkehr eines Steindenkmals aus Neudenaus mainzischer Zeit
Creators: name: Assion, Peter
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 9, Nr. 1 (1980), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
title: Fachwerk als nostalgische Masche
Creators: name: Gräf, Ulrich Cräf
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 9, Nr. 2 (1980), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Measurements of Higgs boson production and couplings in diboson final states with the ATLAS detector at the LHC
Creators: name: ATLAS Collaboration
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Measurements are presented of production properties and couplings of the recently discovered Higgs boson using the decays into boson pairs, $H\rightarrowγγ$, $H\rightarrow ZZ^{*}\rightarrow 4 \ell$ and $H\rightarrow W W \rightarrow \ellν\ellν$. The results are based on the complete pp collision data sample recorded by the ATLAS experiment at the CERN Large Hadron Collider at centre-of-mass energies of 7 TeV and 8 TeV, corresponding to an integrated luminosity of about 25 fb$^{-1}$. Evidence for Higgs boson production through vector-boson fusion is reported. Results of combined fits probing Higgs boson couplings to fermions and bosons, as well as anomalous contributions to loop-induced production and decay modes, are presented. All measurements are consistent with expectations for the Standard Model Higgs boson.
description: 23 pages plus author list (38 pages total), 13 figures, 10 tables, published in Phys. Lett. B 726 (2013) 88. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2013-02/
Strong-Weak Duality via Jordan-Wigner Transformation: Using Fermionic Methods for Strongly Correlated $su(2)$ Spin Systems
Creators: name: Henderson, Thomas M.
name: Chen, Guo P.
name: Scuseria, Gustavo E.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The Jordan-Wigner transformation establishes a duality between $su(2)$ and fermionic algebras. We present qualitative arguments and numerical evidence that when mapping spins to fermions, the transformation makes strong correlation weaker, as demonstrated by the Hartree-Fock approximation to the transformed Hamiltonian. This result can be rationalized in terms of rank reduction of spin shift terms when transformed to fermions. Conversely, the mapping of fermions to qubits makes strong correlation stronger, complicating its solution when one uses qubit-based correlators. The presence of string operators poses challenges to the implementation of quantum chemistry methods on classical computers, but these can be dealt with using established techniques of low computational cost. Our proof of principle results for XXZ and J$_1$-J$_2$ Heisenberg (in 1D and 2D) indicate that the JW transformed fermionic Hamiltonian has reduced complexity in key regions of their phase diagrams, and provides a better starting point for addressing challenging spin problems.
description: First revision
title: Burg, Schloß und Stadt Marbach am Neckar
Creators: name: Schäfer, Hartmut
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 9, Nr. 2 (1980), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
title: Schloß zu verkaufen im Neckar-Odenwald-Kreis
Creators: name: Schubart, P.
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 9, Nr. 2 (1980), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Distances, Radial Distribution and Total Number of Galactic Supernova Remnants
Creators: name: Ranasinghe, S.
name: Leahy, D.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a table of 215 SNRs with distances. New distances are found to SNR G$51.26+0.11$ of $6.6 \pm 1.7$ kpc using HI absorption spectra, and to 5 other SNRs using maser/molecular cloud associations. We recalculate the distances and errors to all SNRs using a consistent rotation curve and provide errors where they were not previously estimated. This results in a significant distance revisions for 20 SNRs. Because of observational constraints and selection effects, there to be is an apparent deficit of observed number of Galactic supernova remnants (SNRs). To investigate this, we employ two methods. The first method applies correction factors for the selection effects to derive the radial density distribution. The second method compares functional forms for the SNR surface density and selection function against the data to find which functions are consistent with the data. The total number of SNRs in the Galaxy is $\sim3500$ (Method 1) or in the range $\sim2400$ to $\sim5600$ (Method 2). We conclude that the current observed number of SNRs is not yet complete enough to give a well-determined total SNR number or radial density function.
description: 24 pages, 8 figures
Comparison of Various Types of Modified Biochar for Optimal PFOS/PFOA Adsorption
Creators: Gray, Gabrielle Frances
Publisher: name: University of Alberta Library
Year: 2023

The increasing abundance of per- and polyfluoroalkyl substances (PFAS) has attracted growing interest due to concern about the potential hazards to public health and ecosystems. Due to PFAS toxicity, mobility, environmental persistence, and strong bioaccumulation, they are being further investigated. Long-chain perfluorooctane sulfonic acid (PFOS) and perfluorooctanoic acid (PFOA) are most often detected in aquatic environments even though their use has been limited by recent regulations. However, most adsorption studies are focused on their removal using deionized water instead of wastewater. In this research, the removal of PFOS in wastewater was investigated using four different types of municipal sludge-produced biochars, where the metal-enhanced ferric chloride (FeCl3)-modified biochar showed the most promising adsorption of PFOS and PFOA. FeCl3-modified biochar was characterized via x-ray diffraction (XRD), x-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR), thermogravimetric analyzer (TGA), and Brunauer–Emmett–Teller (BET) method. The results indicated that physical adsorption might play a dominant role in the removal process. The FeCl3-modified biochar exhibited a high removal efficiency of PFOS and PFOA, 99.89% and 94.34%, respectively, with an initial concentration of 25 mg L-1, for PFOS and PFOA and an adsorbent dosage of 0.5 g L-1 and 0.75 g L-1, respectively. The possible adsorption mechanism was proposed, and the enhanced removal ability was due to the improved specific surface area, and pore volume. Functional groups in the biochar, such as Fe, were also responsible for the enhanced removal ability, which also might be the reason for the better performance of the FeCl3-modified biochar than other modified biochars. Moreover, the adsorption process was best described using the Langmuir and pseudo-second-order models. The desorption and regeneration of FeCl3-modified biochar for the removal of PFOS and PFOA were also determined. No desorption of PFOS was observed at 24 hrs or 7 days and a 5.3% desorption of PFOA was seen after 7 days. The regeneration of FeCl3-modified biochar for PFOS and PFOA adsorption was evaluated over five cycles. After the first regeneration cycle, the FeCl3-modified biochar removed 84.68% of PFOS with the removal decreasing with each cycle to 33.47%. PFOA removal increased with the first regeneration cycle to 100% and was maintained for four cycles before reducing to 99.08% after the fifth regeneration cycle. Overall, the FeCl3-modified biochar would be a promising and effective adsorbent for PFOS and PFOA removal, due to its removal efficiency and cost-effective and environmentally friendly advantages.
title: Veröffentlichungen des Landesdenkmalamtes
Creators: name: Redaktion, Die
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 9, Nr. 3 (1980), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
title: Denkmäler der frühen Moderne in Stuttgart und ihre konservatorischen Probleme
Creators: name: Bongartz, Norbert
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 9, Nr. 4 (1980), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
A Simple Kontinuitätssatz
Creators: name: Biswas, Chandan
Publisher: name: arXiv
Year: 2013
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics

description: We are interested in several informal statements referred as "Kontinuitätssatz" in the recent literature on analytic continuation. The basic (unstated) principle that seems to be in use in these works appears to be a folk theorem. We provide a precise statement of this folk Kontinuitätssatz and give a proof of it.
description: 12 pages; final accepted version appears in Complex Var. Elliptic Equ. in the issue stated below
Vortex dynamics in the two-dimensional BCS-BEC crossover
Creators: name: Heyl, Max
name: Adachi, Kyosuke
name: Itahashi, Yuki M.
name: Nakagawa, Yuji
name: Kasahara, Yuichi
name: List-Kratochvil, Emil J. W.
name: Kato, Yusuke
name: Iwasa, Yoshihiro
Publisher: name: arXiv
Year: 2022
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The Bardeen-Cooper-Schrieffer (BCS) condensation and Bose-Einstein condensation (BEC) are the two limiting ground states of paired Fermion systems, and the crossover between these two limits has been a source of excitement for both fields of high temperature superconductivity and cold atom superfluidity. For superconductors, ultra-low doping systems like graphene and LixZrNCl successfully approached the crossover starting from the BCS-side. These superconductors offer new opportunities to clarify the nature of charged-particles transport towards the BEC regime. Here we report the study of vortex dynamics within the crossover using their Hall effect as a probe in LixZrNCl. We observed a systematic enhancement of the Hall angle towards the BCS-BEC crossover, which was qualitatively reproduced by the phenomenological time-dependent Ginzburg-Landau (TDGL) theory. LixZrNCl exhibits a band structure free from various electronic instabilities, allowing us to achieve a comprehensive understanding of the vortex Hall effect and thereby propose a global picture of vortex dynamics within the crossover. These results demonstrate that gate-controlled superconductors are ideal platforms towards investigations of unexplored properties in BEC superconductors.
Tropical Amplitudes
Creators: name: Tourkine, Piotr
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Algebraic Geometry (math.AG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: In this work, we argue that the $α'\to 0$ limit of closed string theory scattering amplitudes is a tropical limit. The motivation is to develop a technology to systematize the extraction of Feynman graphs from string theory amplitudes at higher genus. An important technical input from tropical geometry is the use of tropical theta functions with characteristics to rigorously derive the worldline limit of the worldsheet propagator. This enables us to perform a non-trivial computation at two loops: we derive the tropical form of the integrand of the genus-two four-graviton type II string amplitude, which matches the direct field theory computations. At the mathematical level, this limit is an implementation of the correspondence between the moduli space of Riemann surfaces and the tropical moduli space.
description: 44 pages+refs, 19 figures. v2: very significant rewriting, expanded and clarified the discussion. Corrected misuse of denomination "Kontsevich-Penner". Added lemma on tropical theta characteristics, proof of the tropical limit of the prime form, and comment on field theory limit at three loops. Version accepted in Annales Henri Poincar\'e
Influence of Switching Dynamics on the Solvent Extraction Process of Polymer Droplets
Creators: Billet, Romain
Publisher: name: University of Alberta Library
Year: 2023

Switchable hydrophilicity solvents (SHSs) are solvents defined by their ability to switch from their hydrophobic form to a hydrophilic form when put in contact with an acidic trigger such as CO2. As a consequence, SHSs qualify as promising alternatives to volatile organic compounds during the industrial solvent extraction processes, as greener and inexpensive methods can be applied to separate and recover SHSs. Furthermore, because of their less volatile nature, SHSs are less flammable and so increase the safety of a larger-scale extraction process. However, the use of SHSs also comes with challenges related to the long switching times and high residual solvent left in extraction products.

In the first part of this work, we study the dynamics and in-drop phase separation during the dissolution process of a sessile binary drop composed of the SHS N,N-Dimethylcyclohexylamine (DMCHA) and polystyrene, triggered by an acid in the surrounding aqueous environment. From 70 different experimental conditions, we found a scaling relationship between the drop dissolution time and initial volume with an overall scaling coefficient of 0.53. We quantitatively assessed and found a shorter dissolution time related with a decrease in pH of the aqueous phase or an increase in initial polymer concentration in the drop. Our experimental results provide a microscopic view of the SHS dissolution process from polymer drops. Examining the internal state of the drop during the dissolution revealed an in-drop phase separation behavior, resulting in a porous morphology of the final polymer particle.

In the second part of this work, we study the effects from switching conditions on the solvent residue during the formation of polystyrene latexes induced by emulsion extraction. The extraction of DMCHA from emulsion droplets containing polystyrene was triggered by addition of an acid in the surrounding aqueous phase. We found a constant level of the solvent residue in the final polystyrene particles regardless of the trigger addition rate and trigger solution concentration. However, a decrease in the solvent residue was achieved at higher fractions of the organic dispersed phase in the emulsion or at lower extraction temperature. The solvent residue may be attributed to the formation of water-oil-water emulsion during the extraction process.

Overall, the work presented in this thesis highlights the phase separation behavior and the link between residual solvent and trapped water. The dynamics of drop dissolution and mechanism for the presence of residual solvent reported in this work may help design SHS extraction processes for particle formation with effective approaches for reducing the residual solvent left after dissolution.
title: 91% für den Denkmalschutz in Baden-Württemberg!
Creators: name: Redaktion, Die
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 9, Nr. 4 (1980), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
The Great Flare of 2021 November 19 on AD Leo. Simultaneous XMM-Newton and TESS observations
Creators: name: Stelzer, B.
name: Caramazza, M.
name: Raetz, St.
name: Argiroffi, C.
name: Coffaro, M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present a detailed analysis of a superflare on the active M dwarf star AD Leonis. The event presents a rare case of a stellar flare observed simultaneously in X-rays (with XMM-Newton) and in optical (with the Transiting Exoplanet Survey Satellite, TESS). The radiated energy both in the 0.2-12 keV X-ray band ($1.26 \pm 0.01 \cdot 10^{33}$ erg) and the bolometric value ($E_{F,bol} = 5.57 \pm 0.03 \cdot 10^{33}$ erg) put this event at the lower end of the superflare class. The exceptional photon statistics deriving from the proximity of AD Leo has enabled measurements in the 1-8 AA GOES band for the peak flux (X1445 class) and integrated energy ($E_{F,GOES} = 4.30 \pm 0.05 \cdot 10^{32}$ erg), making possible a direct comparison with data on flares from our Sun. From extrapolations of empirical relations for solar flares we estimate that a proton flux of at least $10^5\,{cm^{-2} s^{-1} sr^{-1}}$ accompanied the radiative output. With a time lag of 300s between the peak of the TESS white-light flare and the GOES band flare peak as well as a clear Neupert effect this event follows very closely the standard (solar) flare scenario. Time-resolved spectroscopy during the X-ray flare reveals, in addition to the time evolution of plasma temperature and emission measure, a temporary increase of electron density and elemental abundances, and a loop that extends in the corona by 13% of the stellar radius ($4 \cdot 10^9$ cm). Independent estimates of the footprint area of the flare from TESS and XMM-Newton data suggest a high temperature of the optical flare (25000 K), but we consider more likely that the optical and X-ray flare areas represent physically distinct regions in the atmosphere of AD Leo.
description: Accepted for publication in A&A Letters
title: Die Dienststellen des Landesdenkmalamtes
Creators: name: Redaktion, Die
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 9, Nr. 4 (1980), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Observation of Floquet topological phases with large Chern numbers
Creators: name: Yang, Kai
name: Xu, Shaoyi
name: Zhou, Longwen
name: Zhao, Zhiyuan
name: Xie, Tianyu
name: Ding, Zhe
name: Ma, Wenchao
name: Gong, Jiangbin
name: Shi, Fazhan
name: Du, Jiangfeng
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: One of the most intriguing advantage of Floquet engineering is to generate new phases with large topological invariants. In this work, we experimentally simulate a periodically quenched generalized Haldane model on an NV center in diamond, and observe its Floquet Chern insulator phases with Chern numbers $C=1,2,4$ by imaging the static and dynamic spin textures in momentum space. Our work reveals the power of Floquet driving in transforming system's topology and generating large Chern number phases. It further establishes a unique experimental scheme to detect Floquet topological phases in two and higher spatial dimensions.
description: 11 pages, figure 1-4, figure s1-s2
title: Ausstellung „Denkmalpflege und Denkmalschutz in Baden-Württemberg"
Creators: name: Redaktion, Die
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 10, Nr. 1 (1981), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Average size of 2-Selmer groups of elliptic curves over function fields
Creators: name: Ho, Q. P.
name: Hung, B. V. Le
name: Ngo, B. C.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Number Theory (math.NT)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: Employing a geometric setting inspired by the proof of the Fundamental Lemma, we study some counting problems related to the average size of 2-Selmer groups and hence obtain an estimate for it.
description: Thoroughly revised to improve the exposition
title: Personalia
Creators: name: Redaktion, Die
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 10, Nr. 1 (1981), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Keeping Oneself to Oneself: Finding Privacy in 19th-century England
Creators: Molin Cherneski, Kristina S
Publisher: name: University of Alberta Library
Year: 2023

This thesis examines the history of privacy in nineteenth-century England, primarily London, centered on the lived experience of people who appear to have had little access to private space and time. By studying lodging-houses from the divergent perspectives of lodgers, their middle-class observers and the landladies who ran them, domestic servants who lived in other people’s homes, and middle-class reformers in settlement houses in East London, this study captures both men and women who lived with others by choice and by necessity. Their experiences and reflections reveal the ways that privacy was negotiated and balanced against economic concerns and social lives while bounded by gender and class. For nineteenth-century people, privacy was interwoven with the demands of respectability and domesticity, and the desire to assert independence and autonomy.

Rather than placing privacy solely within the realm of the private home exclusively, in a dichotomy between public and private, privacy could be found in the practices and routines of everyday life and in the ways people lived together and treated each other. While privacy as we might consider it could be limited for those that lived in common with others, it could also be found in places that appeared to be fundamentally public, claimed in unexpected ways and locations. It could also be rejected in favour of sociability and community, as a strategy for survival and a bulwark against isolation.

Privacy was not a well-defined right or legal structure in nineteenth-century England, but it was valued and could be asserted through daily decisions. It did not look the same for people of different classes; the middle class often failed to recognize the practices of privacy of the working class and did not recognize the reasons that they might have different strategies. By examining what people chose to share with those around them, or what they kept to themselves and the places and ways they spent their time, the study of privacy demonstrates the ways that people thought about and navigated their economic, social and cultural worlds.
title: Josef und Konrad Hecht: Die frühmittelallerliche Wandmalerei des Bodenseegebietes. 2 Bde. Jan Thorbecke Verlag, Sigmaringen 1979 ; Quellennachweis
Creators: name: Haas, Walter
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 10, Nr. 1 (1981), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
title: Inhalt
Creators: name: Redaktion, Die
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 10, Nr. 2 (1981), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Polar Bear Conservation in a Period of Arctic Warming
Creators: Hamilton, Stephen
Publisher: name: University of Alberta Library
Year: 2023

Polar bear conservation faces significant challenges under Arctic warming, especially with respect to habitat loss and the resulting impacts on their seasonal energetic uptake and maintenance. Polar bears rely on sea ice for hunting, mating, denning, and rearing of offspring, and the availability of ice, both spatially and temporally, influences their fitness and survival. The research collected in this thesis includes an assessment of the global polar bear population, identifying gaps in the knowledge, and presenting a model linking polar bear density to prey diversity, providing estimates for missing subpopulations. The majority of subpopulations are found to be vulnerable to continued Arctic warming based on decadal-scale changes to sea ice and population size. A sea ice projection model for the Canadian Arctic Archipelago provided the means to estimate how sea ice degradation and loss may affect polar bears through the 21st century. Projections suggest that, without curbing greenhouse gas emissions, ice conditions in the Archipelago will shift away from a multi-year sea ice regime, and lengthening ice-free conditions will harm polar bear reproductive success and increase starvation rates. An analysis of movement patterns of adult and subadult, males and female polar bears, in the southern Beaufort Sea suggests that the ice-free season is associated with higher movement rates, thus greater demands on energy stores during a season that is expected to get longer with future warming. An assessment of time and space use of harvest risk areas derived from historical harvest locations found that subadult males were more often in risk areas than other age and sex classes, although they avoided the highest risk areas. Landfast ice in the low-risk areas was decreasing faster over time, with the possibility to concentrate polar bears into areas of higher risk to harvest under continued Arctic warming.
L'entrepreneuriat au Maroc : L'évaluation des politiques publiques
Creators: name: Chaymae ELJAI
name: Nadia TAMOUH
name: Rahhal LAHRACH
name: Ouarda bouabdellah
Publisher: name: Zenodo
Year: 2023

description: L'évaluation des politiques publiques est un processus systématique visant à mesurer l'efficacité, l'efficience, la pertinence et l'impact des initiatives gouvernementales mises en place pour résoudre des problèmes sociaux, économiques ou environnementaux. Elle vise à fournir des informations objectives permettant aux décideurs politiques d'améliorer la prise dedécision et l'allocation des ressources.
L'objectif de ce papier est de présenter de façon exhaustive théoriquement les définitions et concepts fondamentaux de l'évaluation des politiques publiques. Notre objectif est de présenter les différents types d'évaluation existants, les critères variés ainsi que les étapes essentielles pour élaborerune évaluation des politiques publiques de manière concise.
title: Limesforschung in Baden-Württemberg
Creators: name: Nuber, Hans Ulrich
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 12, Nr. 3 (1983), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Stock price direction prediction by directly using prices data: an empirical study on the KOSPI and HSI
Creators: name: Wang, Yanshan
Publisher: name: arXiv
Year: 2013
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Machine Learning (cs.LG)
subject: Statistical Finance (q-fin.ST)
subject: FOS: Computer and information sciences
subject: FOS: Economics and business

description: The prediction of a stock market direction may serve as an early recommendation system for short-term investors and as an early financial distress warning system for long-term shareholders. Many stock prediction studies focus on using macroeconomic indicators, such as CPI and GDP, to train the prediction model. However, daily data of the macroeconomic indicators are almost impossible to obtain. Thus, those methods are difficult to be employed in practice. In this paper, we propose a method that directly uses prices data to predict market index direction and stock price direction. An extensive empirical study of the proposed method is presented on the Korean Composite Stock Price Index (KOSPI) and Hang Seng Index (HSI), as well as the individual constituents included in the indices. The experimental results show notably high hit ratios in predicting the movements of the individual constituents in the KOSPI and HIS.
description: in International Journal of Business Intelligence and Data Mining, 2014
53Mn-53Cr chronology and ε54Cr-Δ17O genealogy of Erg Chech 002: the oldest andesite in the Solar System
Creators: name: Anand, Aryavart
name: Kruttasch, Pascal M.
name: Mezger, Klaus
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: The meteorite sample Erg Chech (EC) 002 is the oldest felsic igneous rock from the Solar System analysed to date and provides a unique opportunity to study the formation of felsic crusts on differentiated protoplanets immediately after metal-silicate equilibration or core formation. The extinct 53Mn-53Cr chronometer provides chronological constraints on the formation of EC 002 by applying the isochron approach using chromite, metal-silicate-sulphide and whole-rock fractions as well as "leachates" obtained by sequential digestion of a bulk sample. Assuming a chondritic evolution of its parent body, a 53Cr/52Cr model age is also obtained from the chromite fraction. The 53Mn-53Cr isochron age of 1.73 (+/-) 0.96 Ma (anchored to D'Orbigny angirte) and the chromite model age constrained between 1.46 (-0.68/+0.78) and 2.18 (-1.06/+1.32) Ma after the formation of calcium-aluminium-rich inclusions (CAIs) agree with the 26Al-26Mg ages (anchored to CAIs) reported in previous studies. This indicates rapid cooling of EC 002 that allowed near-contemporaneous closure of multiple isotope systems. Additionally, excess in the neutron-rich 54Cr (nucleosynthetic anomalies) combined with mass-independent isotope variations of 17O provide genealogical constraints on the accretion region of the EC 002 parent body. The 54Cr and 17O isotope compositions of EC 002 confirm its origin in the "non-carbonaceous" reservoir and overlap with the vestoid material NWA 12217 and anomalous eucrite EET 92023. This indicates a common feeding zone during accretion in the protoplanetary disk between the source of EC 002 and vestoids. The enigmatic origin of iron meteorites remains still unresolved as EC 002, which is more like a differentiated crust, has an isotope composition that does not match known irons meteorite groups that were once planetesimal cores.
description: Accepted in 'Meteoritics & Planetary Science' journal
Asymptotic Resemblance
Creators: name: Kalantari, Sh.
name: Honari, B.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Geometric Topology (math.GT)
subject: General Topology (math.GN)
subject: FOS: Mathematics
subject: 51F99, 53C23, 54C20, 18B30

description: Uniformity and proximity are two different ways for defining small scale structures on a set. Coarse structures are large scale counterparts of uniform structures. In this paper, motivated by the definition of proximity, we develop the concept of asymptotic resemblance as a relation between subsets of a set to define a large scale structure on it. We use our notion of asymptotic resemblance to generalize some basic concepts of coarse geometry. We introduce a large scale compactification which in special cases agrees with Higson compactification. At the end we show that how the asymptotic dimension of a metric space can be generalized to a set equipped with an asymptotic resemblance relation.
title: Die Dienststellen des Landesdenkmalamtes
Creators: name: Redaktion, Die
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 12, Nr. 3 (1983), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
MPEC 2023-V220 : 2023 VT7
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2023 VT7

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
The seasonality of non-structural carbohydrates in mature boreal Betula papyrifera and potential constraints in their remobilization
Creators: Fermaniuk, Coral
Publisher: name: University of Alberta Library
Year: 2023

Assimilated non-structural carbohydrates (NSC) can be stored as reserves in plants and remobilized during periods of asynchrony between carbon acquisition and carbon demand to fuel essential metabolic functions and growth. However, the framework of NSC allocation to reserves and their remobilization remains unclear, especially for mature trees which potentially can store large quantities of reserves. Here, I characterize the seasonal dynamics of NSC reserves in mature boreal Betula papyrifera and relate them to seasonal growth processes (first study), as well as determine the patterns and potential constraints of between-organ reserve remobilization. I used different patterns of stem phloem girdling to separate crown, stem and root NSC storage and their remobilization in response to induced C stress (second study). In the first study, I found that whole-tree NSC pools increased seasonally by 72% from a spring minimum to a maximum during late summer bud-set — greatly exceeding the relative change in reserves reported for more temperate conspecifics. At the organ level, the branches were the largest and most dynamic storage pool, suggesting that storage changes at the branch level largely drive whole-tree storage dynamics in these trees. In the second study, I found evidence that the crown of birch trees could store nearly double the reserves of what was observed under normal conditions, and that the stored NSC in the stem may not be universally available for remobilization to other organs (here roots) under C stress. Together, these results suggest that seasonal NSC allocation patterns appear to be highly regulated to ensure adequate distribution (allocation) of NSC to reserves throughout organs over time to support organ-level processes — however, if organs are constrained by carbon limitations, it appears that the remobilization of the organ reserve storage pools are regulated somewhat autonomously which could potentially limit the sharing of reserves within the large organism.
title: Semisupervised machine learning algorithms and their application to geoscience classification problems
Creators: name: Dunham, Michael W.
Publisher: name: Memorial University of Newfoundland
Year: 2022

description: In recent years, many disciplines have been challenged with trying to extract valuable information from large datasets efficiently. Technological advances have improved data storage capabilities and how data can be obtained (e.g., real-time data). Manually interpreting data that are exponentially growing in volume has obvious management and analysis challenges. Machine learning algorithms recognize patterns in data and assign repetitive patterns to similar categories. This process automates pattern recognition in data and allows meaningful information to be extracted in an efficient manner. For many machine learning problems, there are sufficient labeled data to train a wide range of algorithms. Some applications, such as image classification and speech recognition, have large labeled datasets readily available. However, in several geoscience-related problems, labeled data are generally obtained by sampling the Earth in some manner (e.g., drilling wells, field sampling, etc.), which is not trivial due to cost and logistical factors. As such, many earth science-related machine learning problems have limited labeled data. Supervised machine learning algorithms are prone to overfitting when labeled data are scarce, but semisupervised approaches are designed for these problems because unlabeled data are also used to inform the learning process. Three geoscience applications inherently challenged with limited training data are well-log classification, seismic classification, and bedrock-lithology mapping. I apply various semisupervised algorithms to these three geoscience problems and determine if semisupervised algorithms can perform better than supervised methods and under what conditions. The semisupervised methods that I consider are self-training, label propagation, and semisupervised Gaussian mixture models. I consider several supervised methods in my work, but the most prevalent are the gradient boosting decision tree methods. The results demonstrate that semisupervised methods can outperform their supervised counterparts for each of the geoscience applications, but not in all situations. Nonetheless, semisupervised methods are rarely considered for many geoscience disciplines, which is demonstrated by the lack of published examples in the literature. The outcomes of this work are raising the awareness of semisupervised methods by showing their applicability to different geoscience problems and making recommendations on how and when to use these tools.
Chemical Composition and Fingerprints of Headspace Vapors of 37 Petroleum Products and Non-Aqueous Phase Liquid Samples
Creators: name: Sun, Yue
name: Guan, Junjie
name: Yue, Gangsen
name: Xiu, Yuan
name: Wang, HeJing
name: McHugh, Thomas
name: Ma, Jie
Publisher: name: Taylor & Francis
Year: 2025
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Cancer
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: In this study, the headspace vapor compositions of 37 unreleased petroleum products and field-collected non-aqueous phase liquid (NAPL) samples including crude oil, gasoline, diesel, kerosene, jet fuel, naphtha, tar, lubricating oil, and field NAPL were measured using an innovative high-resolution analytical method. Gasoline and some crude oils are highly volatile while diesel, kerosene, and jet fuel have much lower volatility. In unreleased gasoline and some light distillates, benzene, toluene, ethylbenzene, and xylenes (BTEX) constitute the majority of volatile aromatic hydrocarbons. As the BTEX compounds represent only a few of the known compounds in gasoline and light distillate products, monitoring only BTEX concentrations in vapor samples may not be sufficient to distinguish among lighter petroleum products nor to totally assess all toxicity associated risks in lighter fuels, both for unreleased and released weathered products. For crude oil vapor samples, however, we found a characteristic distribution of compound groups and carbon number range distribution despite varying widely in TVOC concentration, allowing clearer specific product identification. In addition, we found that total VOC composition in middle distillate fuel vapor samples was more variable indicating that vapor fingerprinting is less useful for identification of middle distillate fuel sources. Similarly, the ratios of individual VOCs in vapor samples could be used to identify specific gasoline and crude oil NAPL sources but was not applicable to many middle distillate fuel sources. This study provides valuable data on the maximum concentrations that could potentially partition from typical petroleum products into the vapor phase, as well as the compositional benchmarks of VOC vapors from petroleum products and NAPL samples.
Ligand additivity relationships enable efficient exploration of transition metal chemical space
Creators: name: Arunachalam, Naveen
name: Gugler, Stefan
name: Taylor, Michael G.
name: Duan, Chenru
name: Nandy, Aditya
name: Janet, Jon Paul
name: Meyer, Ralf
name: Oldenstaedt, Jonas
name: Chu, Daniel B. K.
name: Kulik, Heather J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: To accelerate exploration of chemical space, it is necessary to identify the compounds that will provide the most additional information or value. A large-scale analysis of mononuclear octahedral transition metal complexes deposited in an experimental database confirms an under-representation of lower-symmetry complexes. From a set of around 1000 previously studied Fe(II) complexes, we show that the theoretical space of synthetically accessible complexes formed from the relatively small number of unique ligands is significantly (ca. 816k) larger. For the properties of these complexes, we validate the concept of ligand additivity by inferring heteroleptic properties from a stoichiometric combination of homoleptic complexes. An improved interpolation scheme that incorporates information about cis and trans isomer effects predicts the adiabatic spin-splitting energy to around 2 kcal/mol and the HOMO level to less than 0.2 eV. We demonstrate a multi-stage strategy to discover leads from the 816k Fe(II) complexes within a targeted property region. We carry out a coarse interpolation from homoleptic complexes that we refine over a subspace of ligands based on the likelihood of generating complexes with targeted properties. We validate our approach on 9 new binary and ternary complexes predicted to be in a targeted zone of discovery, suggesting opportunities for efficient transition metal complex discovery.