cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Estimating stellar atmospheric parameters, absolute magnitudes and elemental abundances from the LAMOST spectra with Kernel-based Principal Component Analysis
Creators: name: Xiang, Maosheng
name: Liu, Xiaowei
name: Shi, Jianrong
name: Yuan, Haibo
name: Huang, Yang
name: Luo, Ali
name: Zhang, Huawei
name: Zhao, Yongheng
name: Zhang, Jiannan
name: Ren, Juanjuan
name: Chen, Bingqiu
name: Wang, Chun
name: Li, Ji
name: Huo, Zhiying
name: Zhang, Wei
name: Wang, Jianling
name: Zhang, Yong
name: Hou, Yonghui
name: Wang, Yuefei
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Accurate determination of stellar atmospheric parameters and elemental abundances is crucial for Galactic archeology via large-scale spectroscopic surveys. In this paper, we estimate stellar atmospheric parameters -- effective temperature T_{\rm eff}, surface gravity log g and metallicity [Fe/H], absolute magnitudes M_V and M_{Ks}, α-element to metal (and iron) abundance ratio [α/M] (and [α/Fe]), as well as carbon and nitrogen abundances [C/H] and [N/H] from the LAMOST spectra with amultivariate regressionmethod based on kernel-based principal component analysis, using stars in common with other surveys (Hipparcos, Kepler, APOGEE) as training data sets. Both internal and external examinations indicate that given a spectral signal-to-noise ratio (SNR) better than 50, our method is capable of delivering stellar parameters with a precision of ~100K for Teff, ~0.1 dex for log g, 0.3 -- 0.4mag for M_V and M_{Ks}, 0.1 dex for [Fe/H], [C/H] and [N/H], and better than 0.05 dex for [α/M] ([α/Fe]). The results are satisfactory even for a spectral SNR of 20. The work presents first determinations of [C/H] and [N/H] abundances from a vast data set of LAMOST, and, to our knowledge, the first reported implementation of absolute magnitude estimation directly based on the observed spectra. The derived stellar parameters for millions of stars from the LAMOST surveys will be publicly available in the form of value-added catalogues.
description: 23 pages, 23 figures; MNRAS accepted
Appendix B from Evolution of parental care in haploid–diploid plants
Creators: name: Bessho, Kazuhiro
name: Sasaki, Akira
Publisher: name: The Royal Society
Year: 2024
Subjects: classificationCode: 310299
subject: Bioinformatics and computational biology not elsewhere classified
classificationCode: 310499
subject: Evolutionary biology not elsewhere classified
classificationCode: 310899
subject: Plant biology not elsewhere classified
classificationCode: 490102
subject: Biological mathematics

description: A theoretical outline of the article using the invasion fitness approach
Geodesic curvature driven surface microdomain formation
Creators: name: Adkins, Melissa R.
name: Zhou, Y. C.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Lipid bilayer membranes are not uniform and clusters of lipids in a more ordered state exist within the generally disorder lipid milieu of the membrane. These clusters of ordered lipids microdomains are now referred to as lipid rafts. Recent reports attribute the formation of these microdomains to the geometrical and molecular mechanical mismatch of lipids of different species on the boundary. Here we introduce the geodesic curvature to characterize the geometry of the domain boundary, and develop a geodesic curvature energy model to describe the formation of these microdomains as a result of energy minimization. Our model accepts the intrinsic geodesic curvature of any binary lipid mixture as an input, and will produce microdomains of the given geodesic curvature as demonstrated by three sets of numerical simulations. Our results are in contrast to the surface phase separation predicted by the classical surface Cahn-Hilliard equation, which tends to generate large domains as a result of the minimizing line tension. Our model provides a direct and quantified description of the structure inhomogeneity of lipid bilayer membrane, and can be coupled to the investigations of biological processes on membranes for which such inhomogeneity plays essential roles.
description: 31 pages
Pulse and quench induced dynamical phase transition in a chiral multiferroic spin chain
Creators: name: Azimi, M.
name: Sekania, M.
name: Mishra, S. K.
name: Chotorlishvili, L.
name: Toklikishvili, Z.
name: Berakdar, J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Quantum dynamics of magnetic order in a chiral multiferroic chain is studied. We consider two different scenarios: Ultrashort terahertz (THz) excitations or a sudden electric field quench. Performing analytical and numerical exact diagonalization calculations we trace the pulse induced spin dynamics and extract quantities that are relevant to quantum information processing. In particular, we analyze the dynamics of the system chirality, the von Neumann entropy, the pairwise and the many body entanglement. If the characteristic frequencies of the generated states are non-commensurate then a partial loss of pair concurrence occurs. Increasing the system size this effect becomes even more pronounced. Many particle entanglement and chirality are robust and persist in the incommensurate phase. To analyze the dynamical quantum transitions for the quenched and pulsed dynamics we combined the Weierstrass factorization technique for entire functions and Lanczos exact diagonalization method. For a small system we obtained analytical results including the rate function of Loschmidt echo. Exact numerical calculations for a system up to 40 spins confirm phase transition. Quench- induced dynamical transitions have been extensively studied recently. Here we show that related dynamical transitions can be achieved and controlled by appropriate electric field pulses.
description: 13 pages, 10 figures, submitted in PRB
Appendix C from Evolution of parental care in haploid–diploid plants
Creators: name: Bessho, Kazuhiro
name: Sasaki, Akira
Publisher: name: The Royal Society
Year: 2024
Subjects: classificationCode: 310299
subject: Bioinformatics and computational biology not elsewhere classified
classificationCode: 310499
subject: Evolutionary biology not elsewhere classified
classificationCode: 310899
subject: Plant biology not elsewhere classified
classificationCode: 490102
subject: Biological mathematics

description: Supplementary figures
Quantum control of photonic entanglement with a single sub-wavelength structure
Creators: name: Büse, Alexander
name: Juan, Mathieu L.
name: Tischler, Nora
name: D'Ambrosio, Vincenzo
name: Sciarrino, Fabio
name: Marrucci, Lorenzo
name: Molina-Terriza, Gabriel
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum entanglement is the basic resource for most quantum information schemes. A fundamental problem of using photonic states as carriers of quantum information is that they interact weakly with matter and that the interaction volume is typically limited by the wavelength of light. The use of metallic structures in quantum plasmonics has the potential to alleviate these problems. Here, we present the first results showing that a single subwavelength plasmonic nanoaperture can controllably modify the quantum state of light. In particular, we experimentally demonstrate that two-photon entanglement can be either completely preserved or completely lost after the interaction with the nanoaperture solely depending on the relative phase between the quantum states. We achieve this effect by using a specially engineered two photon state to match the properties of the nanoaperture. The effect is fundamentally mediated by quantum interference which occurs at scales smaller than the wavelength of light. This connection between nano-photonics and quantum optics not only demonstrates an unprecedented control over light-matter interaction in the quantum limit, but also probes the fundamental limits of the phenomenon of quantum interference.
Dynamical Phonon Laser in Coupled Active-Passive Microresonators
Creators: name: He, Bing
name: Yang, Liu
name: Xiao, Min
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Effective transition between the population-inverted optical eigenmodes of two coupled microcavities carrying mechanical oscillation realizes a phonon analogue of optical two-level laser. By providing an approach that linearizes the dynamical equations of weak nonlinear systems without relying on their steady states, we study such phonon laser action as a realistic dynamical process, which exhibits time-dependent stimulated phonon field amplification especially when one of the cavities is added with optical gain medium. The approach we present explicitly gives the conditions for the optimum phonon lasing, and thermal noise is found to be capable of facilitating the phonon laser action significantly.
description: 11 pages, 5 figures; to be published as a PRA Rapid Communication
Appendix A from Evolution of parental care in haploid–diploid plants
Creators: name: Bessho, Kazuhiro
name: Sasaki, Akira
Publisher: name: The Royal Society
Year: 2024
Subjects: classificationCode: 310299
subject: Bioinformatics and computational biology not elsewhere classified
classificationCode: 310499
subject: Evolutionary biology not elsewhere classified
classificationCode: 310899
subject: Plant biology not elsewhere classified
classificationCode: 490102
subject: Biological mathematics

description: A theoretical outline of the article using R0 and its proxy approach
The geometry of real reducible polarizations in quantum mechanics
Creators: name: Prieto, Carlos Tejero
name: Vitolo, Raffaele
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mathematical Physics (math-ph)
subject: Differential Geometry (math.DG)
subject: Symplectic Geometry (math.SG)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 81S10, 53D50

description: The formulation of Geometric Quantization contains several axioms and assumptions. We show that for real polarizations we can generalize the standard geometric quantization procedure by introducing an arbitrary connection on the polarization bundle. The existence of reducible quantum structures leads to considering the class of Liouville symplectic manifolds. Our main application of this modified geometric quantization scheme is to Quantum Mechanics on Riemannian manifolds. With this method we obtain an energy operator without the scalar curvature term that appears in the standard formulation, thus agreeing with the usual expression found in the Physics literature.
description: 29 pages
Evolution of the Ace-1 and Gste2 mutations and their potential impact on the use of carbamate and organophosphates in IRS for controlling Anopheles gambiae s.l., the major malaria mosquito in Senegal
Creators: name: Diallo, M
name: Kolley, ESM
name: Dia, AK
name: Oboh, MA
name: Seck, F
name: Manneh, J
name: Sesay, AK
name: Diédhiou, SM
name: Sarr, PC
name: Sy, O
name: Samb, B
name: Gaye, O
name: Faye, O
name: Konaté, L
name: Assogba, BS
name: Niang, EHA
Publisher: name: The Francis Crick Institute
Year: 2022
Subjects: Genetics & Genomics
Infectious Disease

description: Widespread of insecticide resistance amongst the species of the Anopheles gambiae complex continues to threaten vector control in Senegal. In this study, we investigated the presence and evolution of the Ace-1 and Gste2 resistance genes in natural populations of Anopheles gambiae s.l., the main malaria vector in Senegal. Using historical samples collected from ten sentinel health districts, this study focused on three different years (2013, 2017, and 2018) marking the periods of shift between the main public health insecticides families (pyrethroids, carbamates, organophosphates) used in IRS to track back the evolutionary history of the resistance mutations on the Ace-1 and Gste2 loci. The results revealed the presence of four members of the Anopheles gambiae complex, with the predominance of An. arabiensis followed by An. gambiae, An. coluzzii, and An. gambiae–coluzzii hybrids. The Ace-1 mutation was only detected in An. gambiae and An. gambiae–coluzzii hybrids at low frequencies varying between 0.006 and 0.02, while the Gste2 mutation was found in all the species with a frequency ranging between 0.02 and 0.25. The Ace-1 and Gste2 genes were highly diversified with twenty-two and thirty-one different haplotypes, respectively. The neutrality tests on each gene indicated a negative Tajima’s D, suggesting the abundance of rare alleles. The presence and spread of the Ace-1 and Gste2 resistance mutations represent a serious threat to of the effectiveness and the sustainability of IRS-based interventions using carbamates or organophosphates to manage the widespread pyrethroids resistance in Senegal. These data are of the highest importance to support the NMCP for evidence-based vector control interventions selection and targeting.
Nanoscale Electrical, Mechanical, and Optoelectronic Properties of III-nitrides via Advanced Atomic Force Microscopy
Creators: name: LOO, CHIN CHYI
Publisher: name: Monash University
Year: 2023
Subjects: classificationCode: 340304
subject: Optical properties of materials
classificationCode: 401603
subject: Compound semiconductors
classificationCode: 340305
subject: Physical properties of materials
classificationCode: 510204
subject: Photonics, optoelectronics and optical communications
classificationCode: 401810
subject: Nanoscale characterisation

description: Motivated by the trend of miniaturization of III-nitrides technology and the rising demand for multifunctional devices, this thesis investigates the nanoscale functional properties of III-nitrides at the nanoscale. It reveals the light-induced strain effect for the first time in III-nitrides, extending the applications of III-nitrides to the optomechanical domain. Besides, it investigates the defects in a relatively new III-nitride, the indium nitride. This insight is essential to producing high-quality indium nitride, crucial for realizing the next-generation terahertz applications. Lastly, this thesis showcases the use of various atomic force microscopy techniques for drawing valuable insight into semiconductors’ nanoscale material properties.
Latest Improvements and Future Plans of the JAXA GHRSST Datasets of MW, LEO-IR and GEO-IR
Creators: name: Kachi, Misako
Publisher: name: Zenodo
Year: 2022

description: Short abstract JAXA operationally produces and distributes various satellite-based SST datasets by using passive microwave, polar-orbital InfraRed and geostationary InfraRed imagers in GDS2.0 format from the JAXA GHRSST server (https://suzaku.eorc.jaxa.jp/GHRSST/) and Himawari Monitor (https://www.eorc.jaxa.jp/ptree/) in near-real-time basis and archives past period data since June 2002. We have updated SGLI SST Ver.3 to improve cloud masks in November 2021 and plan to update AMSR2 SST Ver.4.1 soon. Due to the improved cloud masking, SGLI SST V3.0 in the daytime are retrieved from the SGLI measurements only with pre-calculated RTM-based coefficients and Baysian-based PDFs and are 100% independent from any other in-situ and analysed data. AMSR2 SST Ver.4.1 will correct underestimation trends versus in-situ observations over Northern low- and mid-latitudes since 2019 and provide SST retrievals under high-wind and weak precipitation conditions, which are set to missing in previous versions. We also prepare tuning of Himawari SST algorithm corresponding to planning change-over of the Japanese geostationary satellite from Himawari-8 to -9 scheduled in late 2022. Overlap operations of Himawari-8 and -9 are planned by Japan Meteorological Agency (JMA) for a couple of months to inter-calibrate two SST products. We are also preparing multiple SST products for the AMSR3 onboard the GOSAT-GW satellite to be launched in JFY2023. Those products will succeed SST datasets of AMSR-E and AMSR2 and improve robustness of SST retrievals and spatial resolution by adding new channels in 10-GHz. We will introduce the latest status of SST datasets and future plans for AMSR3.
Fate and stability of dissolved organic carbon in topsoils and subsoils under beech forests
Creators: name: Kalks, Fabian
name: Liebmann, Patrick
name: Wordell-Dietrich, Patrick
name: Guggenberger, Georg
name: Kalbitz, Karsten
name: Mikutta, Robert
name: Helfrich, Mirjam
name: Don, Axel
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2023
Subjects: subject: 550

description: Dissolved organic carbon (DOC) from Oa horizons has been proposed to be an important contributor for subsoil organic carbon stocks. We investigated the fate of DOC by directly injecting a DOC solution from 13C labelled litter into three soil depths at beech forest sites. Fate of injected DOC was quantified with deep drilling soil cores down to 2 m depth, 3 and 17 months after the injection. 27 ± 26% of the injected DOC was retained after 3 months and 17 ± 22% after 17 months. Retained DOC was to 70% found in the first 10 cm below the injection depth and on average higher in the topsoil than in the subsoil. After 17 months DOC in the topsoil was largely lost (− 19%) while DOC in the subsoil did not change much (− 4.4%). Data indicated a high stabilisation of injected DOC in the subsoils with no differences between the sites. Potential mineralisation as revealed by incubation experiments however, was not different between DOC injected in topsoil or subsoils underlining the importance of environmental factors in the subsoil for DOC stabilisation compared to topsoil. We conclude that stability of DOC in subsoil is primary driven by its spatial inaccessibility for microorganisms after matrix flow while site specific properties did not significantly affect stabilisation. Instead, a more fine-textured site promotes the vertical transport of DOC due to a higher abundance of preferential flow paths.
A variation in FGF14 is associated with downbeat nystagmus in a genome-wide association study
Creators: name: Strupp, Michael
name: Maul, Stephan
name: Konte, Bettina
name: Hartmann, Annette M.
name: Giegling, Ina
name: Wollenteit, Sophia
name: Feil, Katharina
name: Rujescu, Dan
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2023
Subjects: subject: 610

description: Downbeat nystagmus (DBN) is a frequent form of acquired persisting central fixation nystagmus, often associated with other cerebellar ocular signs, such as saccadic smooth pursuit or gaze-holding deficits. Despite its distinct clinical features, the underlying etiology of DBN often remains unclear. Therefore, a genome-wide association study (GWAS) was conducted in 106 patients and 2609 healthy controls of European ancestry to identify genetic variants associated with DBN. A genome-wide significant association (p < 5 × 10−8) with DBN was found for a variation on chromosome 13 located within the fibroblast growth factor 14 gene (FGF14). FGF14 is expressed in Purkinje cells (PCs) and a reduction leads to a decreased spontaneous firing rate and excitability of PCs, compatible with the pathophysiology of DBN. In addition, mutations in the FGF14 gene cause spinocerebellar ataxia type 27. Suggestive associations (p < 1 × 10−05) could be detected for 15 additional LD-independent loci, one of which is also located in the FGF14 gene. An association of a region containing the dihydrofolate reductase (DHFR) and MutS Homolog 3 (MSH3) genes on chromosome 5 was slightly below the genome-wide significance threshold. DHFR is relevant for neuronal regulation, and a dysfunction is known to induce cerebellar damage. Among the remaining twelve suggestive associations, four genes (MAST4, TPPP, FTMT, and IDS) seem to be involved in cerebral pathological processes. Thus, this GWAS analysis has identified a potential genetic contribution to idiopathic DBN, including suggestive associations to several genes involved in postulated pathological mechanisms of DBN (i.e., impaired function of cerebellar PCs).
PANIC - A surface science package for the in situ characterization of a near-Earth asteroid
Creators: name: Schindler, Karsten
name: Thomas, Cristina A.
name: Reddy, Vishnu
name: Weber, Andreas
name: Gruska, Stefan
name: Fasoulas, Stefanos
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: This paper presents the results of a mission concept study for an autonomous micro-scale surface lander also referred to as PANIC - the Pico Autonomous Near-Earth Asteroid In Situ Characterizer. The lander is based on the shape of a regular tetrahedron with an edge length of 35 cm, has a total mass of approximately 12 kg and utilizes hopping as a locomotion mechanism in microgravity. PANIC houses four scientific instruments in its proposed baseline configuration which enable the in situ characterization of an asteroid. It is carried by an interplanetary probe to its target and released to the surface after rendezvous. Detailed estimates of all critical subsystem parameters were derived to demonstrate the feasibility of this concept. The study illustrates that a small, simple landing element is a viable alternative to complex traditional lander concepts, adding a significant science return to any near-Earth asteroid (NEA) mission while meeting tight mass budget constraints.
description: 16 pages, 5 figures
Determinants of Spike infectivity, processing, and neutralization in SARS-CoV-2 Omicron subvariants BA.1 and BA.2.
Creators: name: Pastorio, Chiara
name: Zech, Fabian
name: Noettger, Sabrina
name: Jung, Christoph
name: Jacob, Timo
name: Sanderson, Theo
name: Sparrer, Konstantin MJ
name: Kirchhoff, Frank
Publisher: name: The Francis Crick Institute
Year: 2022
Subjects: subject: Infectious Disease
subject: Immunology
subject: FOS: Clinical medicine
subject: Structural Biology & Biophysics

description: SARS-CoV-2 Omicron rapidly outcompeted other variants and currently dominates the COVID-19 pandemic. Its enhanced transmission and immune evasion are thought to be driven by numerous mutations in the Omicron Spike protein. Here, we systematically introduced BA.1 and/or BA.2 Omicron Spike mutations into the ancestral Spike protein and examined the impacts on Spike function, processing, and susceptibility to neutralization. Individual mutations of S371F/L, S375F, and T376A in the ACE2-receptor-binding domain as well as Q954H and N969K in the hinge region 1 impaired infectivity, while changes to G339D, D614G, N764K, and L981F moderately enhanced it. Most mutations in the N-terminal region and receptor-binding domain reduced the sensitivity of the Spike protein to neutralization by sera from individuals vaccinated with the BNT162b2 vaccine and by therapeutic antibodies. Our results represent a systematic functional analysis of Omicron Spike adaptations that have allowed this SARS-CoV-2 variant to dominate the current pandemic.
Detoxifying deoxynivalenol (DON)-contaminated feedstuff : consequences of sodium sulphite (SoS) treatment on performance and blood parameters in fattening pigs
Creators: name: Bahrenthien, Lisa
name: Klüß, Jeannette
name: Berk, A.
name: Kersten, Susanne
name: Saltzmann, Janine
name: Hüther, Liane
name: Schatzmayr, D.
name: Schwartz-Zimmermann, H. E.
name: Zeyner, Annette
name: Dänicke, Sven
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2020
Subjects: subject: 570

description: A 10-week feeding experiment was carried out examining the effects of deoxynivalenol (DON)-contaminated maize treated with different sodium sulphite (SoS) concentrations on performance, health and DON-plasma concentrations in fattening pigs. Two maize batches were used: background-contaminated (CON, 0.73 mg/kg maize) and Fusarium-toxin contaminated (DON, 44.45 mg/kg maize) maize. Both were wet preserved at 20% moisture content, with one of three (0.0, 2.5, 5.0 g/kg maize) sodium sulphite concentrations and propionic acid (15%). Each maize batch was then mixed into a barley-wheat-based diet at a proportion of 10%, resulting in the following 6 feeding groups: CON− (CON + 0.0 g SoS/kg maize), CON2.5 (CON + 2.5 g SoS/kg maize), CON5.0 (CON + 5.0 g SoS/kg maize), DON- (DON + 0.0 g SoS/kg maize), DON2.5 (DON + 2.5 g SoS/kg maize) and DON5.0 (DON + 5.0 g SoS/kg maize). Dietary DON concentration was reduced by ~ 36% in group DON2.5 and ~ 63% in group DON5.0. There was no impact on ZEN concentration in the diets due to SoS treatment. Pigs receiving diet DON- showed markedly lower feed intake (FI) compared to those fed the control diets. With SoS-treatment of maize, FI of pigs fed the DON diet (DON5.0: 3.35 kg/d) were comparable to that control (CON−: 3.30 kg/day), and these effects were also reflected in live weight gain. There were some effects of SoS, DON or their interaction on serum urea, cholesterol and albumin, but always within the physiological range and thus likely negligible. SoS wet preservation of Fusarium-toxin contaminated maize successfully detoxified DON to its innocuous sulfonates, thus restoring impaired performance in fatteners.
Mitochondrial DNA control region variation in a population sample from Thailand
Creators: name: Sauer, Dirk Christopher
name: Naue, Jana
name: Immel, Uta-Dorothee
name: Lutz-Bonengel, Sabine
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2020
Subjects: subject: 611

description: Mitochondrial DNA (mtDNA) control region sequences from hair samples of 213 individuals from Thailand were analyzed using Sanger sequencing. A total of 170 different haplotypes were identified, of which 146 occurred only once (unique haplotypes). The dataset showed a random match probability of 0.87% and a haplotype diversity of 0.9960. The samples were assigned to 85 different haplogroups with B5a, F1a1a, and M being the most frequent ones. Pairwise FST-values between this and other Southeast and East Asian populations revealed significant but relatively low differences, indicating a close relation. Heteroplasmic positions were observed in 12.2% of hair samples confirming the frequent appearance of heteroplasmic positions in hairs. This dataset will complement existing data as an mtDNA reference for forensic investigations.
Cost-effective description of strong correlation: efficient implementations of the perfect quadruples and perfect hextuples models
Creators: name: Lehtola, Susi
name: Parkhill, John
name: Head-Gordon, Martin
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Chemical Physics (physics.chem-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Novel implementations based on dense tensor storage are presented for the singlet-reference perfect quadruples (PQ) [Parkhill, Lawler, and Head-Gordon, J. Chem. Phys. 130, 084101 (2009)] and perfect hextuples (PH) [Parkhill and Head-Gordon, J. Chem. Phys. 133, 024103 (2010)] models. The methods are obtained as block decompositions of conventional coupled-cluster theory that are exact for four electrons in four orbitals (PQ) and six electrons in six orbitals (PH), but that can also be applied to much larger systems. PQ and PH have storage requirements that scale as the square, and as the cube of the number of active electrons, respectively, and exhibit quartic scaling of the computational effort for large systems. Applications of the new implementations are presented for full-valence calculations on linear polyenes (C n H n+2 ), which highlight the excellent computational scaling of the present implementations that can routinely handle active spaces of hundreds of electrons. The accuracy of the models is studied in the π space of the polyenes, in hydrogen chains (H 50 ), and in the π space of polyacene molecules. In all cases, the results compare favorably to density matrix renormalization group values. With the novel implementation of PQ, active spaces of 140 electrons in 140 orbitals can be solved in a matter of minutes on a single core workstation, and the relatively low polynomial scaling means that very large systems are also accessible using parallel computing.
description: 13 pages, 7 figures
Social Media – the Art Nouveau of Communicating Research Projects to Citizens?
Creators: name: Simperler, Alexandra
name: Waslmayr, Laura
name: Dong, Xiran
name: Janotka, Ernst-Dieter
name: Goldbeck, Gerhard
name: Adamovic, Nadja
Publisher: name: Zenodo
Year: 2024
Subjects: science communication
social media
illustrations
outreach
knowledge transfer
public engagement
conceptual art

description: Visual media remain a valuable channel to educate the wider population, but the receiving screen has moved on to computers and handheld devices. With the emergence of social media platforms, we can now engage with global civil society more directly. With these platforms, there is a renewed importance and opportunity to use illustrations to convey content or accompany the written word. The last section of this paper is dedicated to YouTube, LinkedIn, X and Instagram and we will share how we use them to reach #civilsociety and how well we manage the Art Nouveau of becoming content creators and disseminating to the wider world.

A collection of our Instagram posts can be found in the accompanying document “OntoTransArt”.
A new type of singular perturbation approximation for stochastic bilinear systems
Creators: name: Redmann, Martin
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2020
Subjects: subject: 510

description: Model order reduction (MOR) techniques are often used to reduce the order of spatially discretized (stochastic) partial differential equations and hence reduce computational complexity. A particular class of MOR techniques is balancing related methods which rely on simultaneously diagonalizing the system Gramians. This has been extensively studied for deterministic linear systems. The balancing procedure has already been extended to bilinear equations, an important subclass of nonlinear systems. The choice of Gramians in Al-Baiyat and Bettayeb (In: Proceedings of the 32nd IEEE conference on decision and control, 1993) is the most frequently used approach. A balancing related MOR scheme for bilinear systems called singular perturbation approximation (SPA) has been described that relies on this choice of Gramians. However, no error bound for this method could be proved. In this paper, we extend SPA to stochastic systems with bilinear drift and linear diffusion term. However, we propose a slightly modified reduced order model in comparison to previous work and choose a different reachability Gramian. Based on this new approach, an L2-error bound is proved for SPA which is the main result of this paper. This bound is new even for deterministic bilinear systems.
Combined supplementary methods & figures from Demographic feedbacks during evolutionary rescue can slow or speed adaptive evolution
Creators: name: Draghi, Jeremy
name: McGlothlin, Joel W.
name: Kindsvater, Holly K.
Publisher: name: The Royal Society
Year: 2024
Subjects: classificationCode: 310299
subject: Bioinformatics and computational biology not elsewhere classified
classificationCode: 310399
subject: Ecology not elsewhere classified
classificationCode: 310499
subject: Evolutionary biology not elsewhere classified
classificationCode: 490102
subject: Biological mathematics

description: Combined supplementary methods & figures
Well-posedness and qualitative behaviour of the Mullins-Sekerka problem with ninety-degree angle boundary contact
Creators: name: Abels, Helmut
name: Rauchecker, Maximilian
name: Wilke, Mathias
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2021
Subjects: subject: 510

description: We show local well-posedness for a Mullins-Sekerka system with ninety degree angle boundary contact. We will describe the motion of the moving interface by a height function over a fixed reference surface. Using the theory of maximal regularity together with a linearization of the equations and a localization argument we will prove well-posedness of the full nonlinear problem via the contraction mapping principle. Here one difficulty lies in choosing the right space for the Neumann trace of the height function and showing maximal Lp−Lq-regularity for the linear problem. In the second part we show that solutions starting close to certain equilibria exist globally in time, are stable, and converge to an equilibrium solution at an exponential rate.
Knowledge transfer as a tool towards improvement of cancer care in low- and middle-income countries : 6th European Roundtable Meeting (ERTM), June 14th, 2019, Berlin, Germany
Creators: name: Ortmann, O.
name: Torode, J.
name: Schmiegel, W.
name: Thomssen, Christoph
name: Hakama, M.
name: Basu, P.
name: Ringborg, U.
name: Helbig, U.
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2020
Subjects: subject: 610

description: Purpose: To identify key factors for the best practice of knowledge transfer from high-income settings to low- and middle-income settings. Results: Interactive sessions led to the identification of European learnings that can and should be shared beyond Europe. Furthermore, methods were characterised which may lead to successful knowledge transfer with subsequent quality improvement. Conclusion: To ensure successful implementation of knowledge and new methods, political support is extremely important. A strong focus should be an improvement of collaboration and network development. Rehabilitation, early and late pallative care, cost effectiveness and long-term follow-up are priorities. Limitations are budget constraints which limit the execution of NCCPs.
Phonon-mediated dimensional crossover in bilayer CrI3
Creators: name: Rodriguez-Vega, Martin
name: Lin, Ze-Xun
name: Leonardo, Aritz
name: Ernst, A.
name: Chaudhary, G.
name: Vergniory, M. G.
name: Fiete, Gregory A.
Publisher: name: The University of Texas at Austin
Year: 2020
Subjects: CrI3

description: In bilayer CrI3, experimental and theoretical studies suggest that the magnetic order is closely related to the layer staking conﬁguration. In this work, we study the eﬀect of dynamical lattice distortions, induced by non-linear phonon coupling, in the magnetic order of the bilayer system. We use density functional theory to determine the phonon properties and group theory to obtain the allowed phonon-phonon interactions. We ﬁnd that the bilayer structure possesses low-frequency Raman modes that can be non-linearly activated upon the coherent photo-excitation of a suitable infrared phonon mode. This transient lattice modiﬁcation in turn inverts the sign of the interlayer spin interaction for parameters accessible in experiments, indicating a low-frequency light-induced antiferromagnet-to-ferromagnet transition.
Observation of Chirality Transition of Quasiparticles at Stacking Solitons in Trilayer Graphene
Creators: name: Yin, Long-Jing
name: Wang, Wen-Xiao
name: Zhang, Yu
name: Ou, Yang-Yang
name: Zhang, Hao-Ting
name: Shen, Cai-Yun
name: He, Lin
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Trilayer graphene (TLG) exhibits rich novel electronic properties and extraordinary quantum Hall phenomena owning to enhanced electronic interactions and tunable chirality of its quasiparticles. Here, we report direct observation of chirality transition of quasiparticles at stacking solitons of TLG via spatial-resolved Landau level spectroscopy. The one-dimensional stacking solitons with width of the order of 10 nm separate adjacent Bernal-stacked TLG and rhombohedral-stacked TLG. By using high field tunneling spectra of scanning tunneling microscopy, we measured Landau quantization in both the Bernal-stacked TLG and the rhombohedral-stacked TLG and, importantly, we observed evolution of quasiparticles between the chiral degree l = 1&2 and l = 3 across the stacking domain wall solitons. Our experiment indicates that such a chirality transition occurs smoothly, accompanying the transition of the stacking orders of TLG, around the domain wall solitons. This result demonstrates the important and hitherto neglected relationship between the crystallographic stacking order and the chirality of quasiparticles in graphene systems.
description: 4 Figures
Strain-dependent luminescence and piezoelectricity in monolayer transition metal dichalcogenides
Creators: name: De Palma, Alex C.
name: Cossio, Gabriel
name: Jones, Kayleigh
name: Quan, Jiamin
name: Li, Xiaoqin
name: Yu, Edward T.
Publisher: name: AIP Publishing
Year: 2020
Subjects: dichalcogenides

description: The modification of optical and electronic properties of transition metal dichalcogenides via mechanical deformation has been widely studied. Their ability to withstand large deformations before rupture has enabled large tunability of the bandgap, and further, the spatially varying strain has been shown to control the spatial distribution of the bandgap and lead to effects such as carrier funneling. Monolayer transition metal dichalcogenides exhibit a significant piezoelectric effect that could couple to a spatially inhomogeneous strain distribution to influence electronic and optical behavior. We investigate both experimentally and theoretically an example case of photoluminescence in structures with a strain distribution similar to that employed in single-photon emitters but generated here via nanoindentation. Using a mechanical model for strain induced by nanoindentation, we show that piezoelectricity can result in charge densities reaching 10 12 e/cm2 and can generate electrostatic potential variations on the order of ±0.1 V across the suspended monolayer. We analyze the implications of these results for luminescence and exciton transport in monolayer transition metal dichalcogenides with spatially varying strain.
Surrealism in North Africa and Western Asia : crossings and encounters
Creators: name: Bellan, Monique
name: Drost, Julia
Publisher: name: Ergon Verlag Würzburg in Kommission, Baden-Baden
Year: 2021
Subjects: subject: Surrealismus
subject: Arabisch
subject: Türkisch
subject: Literatur
subject: 892.7091163
subject: 894.35091163

description: Der vorliegende Band beschäftigt sich mit dem Surrealismus in Literatur und Kunst in Algerien, Ägypten, Libanon, Syrien und der Türkei zwischen den 1930er und 1980er Jahren. In einer transkulturellen Perspektive erscheint die zu Beginn der 1920er Jahre von Frankreich ausgehende Bewegung gleichermaßen als globales wie als lokales Phänomen, das in den hier behandelten Regionen weniger auf kollektive als auf individualistische Weise, vornehmlich auf dem Gebiet von Poesie und Sprache, rezipiert wurde. Die Studien in diesem Band verfolgen das Ziel, ein klareres Bild von den Resonanzen des Surrealismus in diesen Regionen zu zeichnen und damit einen Beitrag zur Geschichte sowohl der Transmoderne als auch des Surrealismus zu leisten. Methodisch geht es darum, Verbindungen, Begegnungen und Austausch auf individuell-künstlerischer, politisch-institutioneller und soziohistorischer Ebene zu untersuchen. Ein neuer Blick auf den globalen Surrealismus muss diese Netzwerke und Verbindungen auf der Mikroebene berücksichtigen, wenn es um die Fragen geht, wann, wo und was Surrealismus war. Die Antwort könnte zeigen, dass der Surrealismus weitaus weiter verbreitet war als bisher angenommen.
description: This volume discusses surrealism in literature and art in Algeria, Egypt, Lebanon, Syria, and Turkey between the 1930s and 1980s. Surrealism emerged as a movement in art and literature in Europe in the 1920s and quickly spread across the globe. It only led to a few movements or official groups in the regions discussed here and was mainly received in poetry rather than in the arts. However, surrealism played a role, albeit a more discrete and individualistic one. The volume aims at drawing a clearer picture of the sporadic resonances of surrealism in these regions thereby contributing to the history of both transmodernism and surrealism. Methodologically, it seeks to explore connections, encounters, and exchanges on individual, institutional, and spiritual levels. A new look at global surrealism needs to consider these micro-level manifestations when addressing questions such as when, where, and what surrealism was. The answer might reveal that surrealism was far more widespread than presumed until now.
Long-term simulation of lead concentrations in agricultural soils in relation to human adverse health effects
Creators: name: Schupp, Thomas
name: Damm, Georg
name: Foth, Heidi
name: Freyberger, Alexius
name: Gebel, Thomas
name: Gundert-Remy, Ursula
name: Hengstler, Jan G
name: Mangerich, Aswin
name: Partosch, Falko
name: Röhl, Claudia
name: Wollin, Klaus-Michael
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2020
Subjects: subject: 577

description: Lead (Pb) exposure of consumers and the environment has been reduced over the past decades. Despite all measures taken, immission of Pb onto agricultural soils still occurs, with fertilizer application, lead shot from hunting activities, and Pb from air deposition representing major sources. Little is known about the intermediate and long-term consequences of these emissions. To gain more insight, we established a mathematical model that considers input from fertilizer, ammunition, deposition from air, uptake of Pb by crops, and wash-out to simulate the resulting Pb concentrations in soil over extended periods. In a further step, human oral exposure by crop-based food was simulated and blood concentrations were derived to estimate the margin of exposure to Pb-induced toxic effects. Simulating current farming scenarios, a new equilibrium concentration of Pb in soil would be established after several centuries. Developmental neurotoxicity represents the most critical toxicological effect of Pb for humans. According to our model, a Pb concentration of ~ 5 mg/kg in agricultural soil leads to an intake of approximately 10 µg Pb per person per day by the consumption of agricultural products, the dose corresponding to the tolerable daily intake (TDI). Therefore, 5 mg Pb/kg represents a critical concentration in soil that should not be exceeded. Starting with a soil concentration of 0.1 mg/kg, the current control level for crop fields, our simulation predicts periods of ~ 50 and ~ 175 years for two Pb immission scenarios for mass of Pb per area and year [scenario 1: ~ 400 g Pb/(ha × a); scenario 2: ~ 175 g Pb/(ha × a)], until the critical concentration of ~ 5 mg/kg Pb in soil would be reached. The two scenarios, which differ in their Pb input via fertilizer, represent relatively high but not unrealistic Pb immissions. From these scenarios, we calculated that the annual deposition of Pb onto soil should remain below ~ 100 g/(ha × a) in order not to exceed the critical soil level of 5 mg/kg. We propose as efficient measures to reduce Pb input into agricultural soil to lower the Pb content of compost and to use alternatives to Pb ammunition for hunting.
Eﬀective Floquet Hamiltonians for periodically-driven twisted bilayer graphene
Creators: name: Vogl, Michael
name: Rodriguez-Vega, Martin
name: Fiete, Gregory A.
Publisher: name: The University of Texas at Austin
Year: 2020
Subjects: Floquet

description: We derive eﬀective Floquet Hamiltonians for twisted bilayer graphene driven by circularly polar- ized light in two diﬀerent regimes beyond the weak-drive, high frequency regime. First, we consider a driving protocol relevant for experiments with frequencies smaller than the bandwidth and weak amplitudes and derive an eﬀective Hamiltonian, which through a symmetry analysis, provides an- alytical insight into the rich eﬀects of the drive. We ﬁnd that circularly polarized light at low frequencies can selectively decrease the strength of AA-type interlayer hopping while leaving the AB-type unaﬀected. Then, we consider the intermediate frequency, and intermediate-strength drive regime. We provide a compact and accurate eﬀective Hamiltonian which we compare with the Van Vleck expansion and demonstrate that it provides a signiﬁcantly improved representation of the exact quasienergies. Finally, we discuss the eﬀect of the drive on the symmetries, Fermi velocity and the gap of the Floquet ﬂat bands.
Some Oscillatory Integral Estimates via Real Analysis
Creators: name: Gilula, Maxim
Publisher: name: arXiv
Year: 2016
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 42B20

description: We study oscillatory integrals in several variables with analytic, smooth, or $C^k$ phases satisfying a nondegeneracy condition attributed to Varchenko. With only real analytic methods, Varchenko's estimates are rediscovered and generalized. The same methods are pushed further to obtain full asymptotic expansions of such integrals with analytic and smooth phases, and finite expansions with error assuming the phase is only $C^k$. The Newton polyhedron appears naturally in the estimates; in particular, we show precisely how the exponents appearing in the asymptotic expansions depend only on the geometry of the Newton polyhedron of the phase. All estimates proven hold for oscillatory parameter real and nonzero, not just asymptotically.
description: 26 pages, 3 figures
Floquet engineering of interlayer couplings: Tuning the magic angle of twisted bilayer graphene at the exit of a waveguide
Creators: name: Vogl, Michael
name: Rodriguez-Vega, Martin
name: Fiete, Gregory A.
Publisher: name: The University of Texas at Austin
Year: 2020
Subjects: Floquet

description: We introduce a new approach that allows one complete control over the modulation of the eﬀective twist angle change in few-layer van der Waals heterostructures by irradiating them with longitudinal waves of light at the end of a waveguide. As a speciﬁc application, we consider twisted bilayer graphene and show that one can tune the magic angles to be either larger or smaller, allowing in-situ experimental control of the phase diagram of this and other related materials. A waveguide allows one to circumvent the free-space constraints on the absence of longitudinal electric ﬁeld components of light. We propose to place twisted bilayer graphene at a speciﬁc location at the exit of a waveguide, such that it is subjected to purely longitudinal components of a transverse magnetic modes (TM) wave.
[Halle (Saale), Universitäts- und Landesbibliothek Sachsen-Anhalt, Morbio 15 (26 a)]
Creators: name: Fridericus
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 1297
Subjects: subject: Sonstige geistliche Aussteller
subject: Urkunde
subject: 090

description: Der Prior Fridericus stiftet der Kirche St. Mariae in Credaro Geld für die Anschaffung von Kerzen.
[Halle (Saale), Universitäts- und Landesbibliothek Sachsen-Anhalt, Morbio 15 (26 b)]
Creators: name: Fridericus
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 1295
Subjects: subject: Sonstige geistliche Aussteller
subject: Urkunde
subject: 090

description: Der Prior Fridericus stiftet der Kirche St. Mariae in Credaro Geld für die Anschaffung von Kerzen.