cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
First case report of an acute hepatitis E subgenotype 3c infection during pregnancy in Germany
Creators: name: Tabatabai, J.
name: Wenzel, Jürgen J.
name: Soboletzki, M.
name: Flux, C.
name: Navid, M. Heidary
name: Schnitzler, P.
Publisher: name: Universität Regensburg
Year: 2014
Subjects: subject: Hepatitis E virus Pregnancy Acute hepatitis Autochthonous hepatitis E
subject: 610 Medizin

description: Hepatitis E is usually a self-limiting disease and an important cause of acute hepatitis in endemic countries in Asia and Africa. However, the mortality rate for pregnant women infected with hepatitis E virus (HEV) in this area is about 25%. In Germany, sporadic cases of acute hepatitis E infections have been described and the number of autochthonous infections is increasing. Here we report an autochthonous HEV subgenotype 3c infection in a 27-year old pregnant woman. This is the first documented case of a hepatitis E infection during pregnancy in Germany. The patient presented in week 26 of gestation with acute hepatitis and elevated transaminases. During follow-up, she tested positive for anti-HEV antibodies. HEV viral load during the acute hepatitis was 2.3 × 106 copies/ml serum, however viremia declined and cleared rapidly. Sequence analysis revealed a HEV subgenotype 3c closely related to European isolates. The patient had not travelled outside Germany, had regular contact to animals, but the source of infection remains unclear. The newborn was delivered in week 40 of gestation in good health, HEV was not transmitted and liver enzymes were normal. In conclusion, hepatitis E should be considered in differential diagnosis in patients with acute hepatitis especially during pregnancy, even without travel history to countries with high endemicity.
From spectral theory to bounds on zeros of holomorphic functions
Creators: name: Hansmann, Marcel
name: Katriel, Guy
Publisher: name: arXiv
Year: 2011
Subjects: subject: Complex Variables (math.CV)
subject: Spectral Theory (math.SP)
subject: FOS: Mathematics

description: We show how eigenvalue estimates for linear operators can be used to obtain new Blaschke type bounds on zeros of holomorphic functions on the unit disk.
description: Revised version (+ some additional changes in the introduction), to appear in Bull. Lond. Math. Soc
Extreme acoustic anisotropy in crystals visualized by diffraction tensor
Creators: name: Naumenko, Natalya
name: Yushkov, Konstantin
name: Molchanov, Vladimir
Publisher: name: arXiv
Year: 2019
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Acoustic wave propagation in single crystals, metamaterials and composite structures is a basic mechanism in acoustic, acousto-electronic and acousto-optic devices. Acoustic anisotropy of crystals provides a variety of device performances and application fields, but its role in pre-estimation of achievable device characteristics and location of crystal orientations with desired properties is often underestimated. A geometrical image of acoustic anisotropy can be an important tool in design of devices based on wave propagation in single crystals or combinations of anisotropic materials. We propose a fast and robust method for survey and visualization of acoustic anisotropy based on calculation of the eigenvalues of bulk acoustic wave (BAW) diffraction tensor (curvature of the slowness surface). The stereographic projection of these eigenvalues clearly reveals singular directions of BAW propagation (acoustic axes) in anisotropic media and areas of fast or slow variation of wave velocities. The method is illustrated by application to three crystals of different symmetry used in different types of acoustic devices: paratellurite, lithium niobate, and potassium gadolinium tungstate. The specific features of acoustic anisotropy are discussed for each crystal in terms of their potential application in devices. In addition, we demonstrate that visualization of acoustic anisotropy of lithium niobate helps to find orientations supporting propagation of high-velocity surface acoustic waves.
description: 12 pages, preprint submitted to EPJ Plus
Ion-Beam-Induced Atomic Mixing in Ge, Si, and SiGe, Studied by Means of Isotope Multilayer Structures
Creators: name: Radek, Manuel
name: Liedke, Bartosz
name: Schmidt, Bernd
name: Voelskow, Matthias
name: Bischoff, Lothar
name: Hansen, John Lundsgaard
name: Larsen, Arne Nylandsted
name: Bougeard, Dominique
Publisher: name: Universität Regensburg
Year: 2017
Subjects: subject: silicon; germanium; ion beam; atomic mixing; thermal spike; radiation enhanced diffusion; amorphization; recrystallization; molecular dynamics
subject: 530 Physik

description: Crystalline and preamorphized isotope multilayers are utilized to investigate the dependence of ion beam mixing in silicon (Si), germanium (Ge), and silicon germanium (SiGe) on the atomic structure of the sample, temperature, ion flux, and electrical doping by the implanted ions. The magnitude of mixing is determined by secondary ion mass spectrometry. Rutherford backscattering spectrometry in channeling geometry, Raman spectroscopy, and transmission electron microscopy provide information about the structural state after ion irradiation. Different temperature regimes with characteristic mixing properties are identified. A disparity in atomic mixing of Si and Ge becomes evident while SiGe shows an intermediate behavior. Overall, atomic mixing increases with temperature, and it is stronger in the amorphous than in the crystalline state. Ion-beam-induced mixing in Ge shows no dependence on doping by the implanted ions. In contrast, a doping effect is found in Si at higher temperature. Molecular dynamics simulations clearly show that ion beam mixing in Ge is mainly determined by the thermal spike mechanism. In the case of Si thermal spike, mixing prevails at low temperature whereas ion beam-induced enhanced self-diffusion dominates the atomic mixing at high temperature. The latter process is attributed to highly mobile Si di-interstitials formed under irradiation and during damage annealing.
Importance of molecular typing in confirmation of the source of a national hepatitis A virus outbreak in Norway and the detection of a related cluster in Germany
Creators: name: Guzman-Herrador, Bernardo R.
name: Panning, Marcus
name: Stene-Johansen, Kathrine
name: Borgen, Katrine
name: Einöder-Moreno, Margot
name: Huzly, Daniela
name: Jensvoll, Laila
name: Lange, Heidi
name: Maassen, Sigrid
name: Myking, Solveig
name: Myrmel, Mette
name: Neumann-Haefelin, Christoph
name: Nygård, Karin
name: Wenzel, Jürgen J.
name: Øye, Ann Kristin
name: Vold, Line
Publisher: name: Universität Regensburg
Year: 2015
Subjects: subject: Coffee Shop, Outbreak Investigation, Outbreak Strain, Outbreak Case, Berry Sample
subject: 610 Medizin

description: In March 2014, after an increase of notifications of domestically acquired hepatitis A virus infections, an outbreak investigation was launched in Norway. Sequenced-based typing results showed that these cases were associated with a strain that was identical to one causing an ongoing multinational outbreak in Europe linked to frozen mixed berries. Thirty-three confirmed cases with the outbreak strain were notified in Norway from November 2013 to June 2014. Epidemiological evidence and trace-back investigations linked the outbreak to the consumption of a berry mix cake. Identification of the hepatitis A virus outbreak strain in berries from one of the implicated cakes confirmed the cake to be the source. Subsequently, a cluster in Germany linked to the cake was also identified.
The su(n) WZNW fusion ring as integrable model: a new algorithm to compute fusion coefficients
Creators: name: Korff, Christian
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Representation Theory (math.RT)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 17B37, 14N10, 17B67, 05E05, 82B23, 81T40

description: This is a proceedings article reviewing a recent combinatorial construction of the su(n) WZNW fusion ring by C. Stroppel and the author. It contains one novel aspect: the explicit derivation of an algorithm for the computation of fusion coefficients different from the Kac-Walton formula. The discussion is presented from the point of view of a vertex model in statistical mechanics whose partition function generates the fusion coefficients. The statistical model can be shown to be integrable by linking its transfer matrix to a particular solution of the Yang-Baxter equation. This transfer matrix can be identified with the generating function of an (infinite) set of polynomials in a noncommutative alphabet: the generators of the local affine plactic algebra. The latter is a generalisation of the plactic algebra occurring in the context of the Robinson-Schensted correspondence. One can define analogues of Schur polynomials in this noncommutative alphabet which become identical to the fusion matrices when represented as endomorphisms over the state space of the integrable model. Crucial is the construction of an eigenbasis, the Bethe vectors, which are the idempotents of the fusion algebra.
description: 33 pages, 8 figures; published in conference proceedings (Kokyuroku Bessatsu) of the workshop "Infinite Analysis 10, Developments in Quantum Integrable Systems", Research Institute for Mathematical Sciences, Kyoto, June 14-16, 2010; v2: some typos in Section 4 fixed
Adipokines in Liver Cirrhosis
Creators: name: Buechler, Christa
name: Haberl, Elisabeth M.
name: Rein-Fischboeck, Lisa
name: Aslanidis, Charalampos
Publisher: name: Universität Regensburg
Year: 2017
Subjects: subject: adiponectin; leptin; MELD; ascites; portal vein
subject: 610 Medizin

description: Liver fibrosis can progress to cirrhosis, which is considered a serious disease. The Child-Pugh score and the model of end-stage liver disease score have been established to assess residual liver function in patients with liver cirrhosis. The development of portal hypertension contributes to ascites, variceal bleeding and further complications in these patients. A transjugular intrahepatic portosystemic shunt (TIPS) is used to lower portal pressure, which represents a major improvement in the treatment of patients. Adipokines are proteins released from adipose tissue and modulate hepatic fibrogenesis. These proteins affect various biological processes that are involved in liver function, including angiogenesis, vasodilation, inflammation and deposition of extracellular matrix proteins. The best studied adipokines are adiponectin and leptin. Adiponectin protects against hepatic inflammation and fibrogenesis, and leptin functions as a profibrogenic factor. These and other adipokines are supposed to modulate disease severity in patients with liver cirrhosis. Consequently, circulating levels of these proteins have been analyzed to identify associations with parameters of hepatic function, portal hypertension and its associated complications in patients with liver cirrhosis. This review article briefly addresses the role of adipokines in hepatitis and liver fibrosis. Here, studies having analyzed these proteins in systemic blood in cirrhotic patients are listed to identify adipokines that are comparably changed in the different cohorts of patients with liver cirrhosis. Some studies measured these proteins in systemic, hepatic and portal vein blood or after TIPS to specify the tissues contributing to circulating levels of these proteins and the effect of portal hypertension, respectively.
Ongoing outbreaks of hepatitis A among men who have sex with men (MSM), Berlin, November 2016 to January 2017 – linked to other German cities and European countries
Creators: name: Werber, Dirk
name: Michaelis, Kai
name: Hausner, Marius
name: Sissolak, Dagmar
name: Wenzel, Jürgen
name: Bitzegeio, Julia
name: Belting, Anne
name: Sagebiel, Daniel
name: Faber, Mirko
Publisher: name: Universität Regensburg
Year: 2017
Subjects: subject: 610 Medizin

description: Since 14 November 2016, 38 cases of hepatitis A have been notified in Berlin; of these, 37 were male and 30 reported to have sex with men (MSM). Median age of MSM cases is 31 years (range: 24–52 years). Phylogenetic analysis revealed three distinct sequences, linking cases in Berlin to those in other German cities and to clusters recognised in other European countries in 2016.
Radiative Processes of Entangled Detectors in Rotating Frames
Creators: name: Costa, Gabriel Picanço
name: Svaiter, Nami Fux
name: Zarro, Carlos Augusto Domingues
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the radiative processes of accelerated entangled two-level systems. Using first-order perturbation theory, we evaluate transition rates of two entangled Unruh-DeWitt detectors rotating with the same angular velocity interacting with a massive scalar field. Decay processes for arbitrary radius, angular velocities, and energy gaps are analyzed. We discuss the mean-life of entangled states and entanglement harvesting and degradation.
description: Version to match the one accepted in JHEP. References added, revised arguments, graphics visualization improved, typos corrected. Results unchanged. 24 pages, 23 figures
Coloured quivers for rigid objects and partial triangulations: The unpunctured case
Creators: name: Marsh, Bethany
name: Palu, Yann
Publisher: name: arXiv
Year: 2010
Subjects: subject: Representation Theory (math.RT)
subject: Category Theory (math.CT)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 16G20, 16E35, 18E30 (Primary) 05C62, 13F60, 30F99 (Secondary)

description: We associate a coloured quiver to a rigid object in a Hom-finite 2-Calabi--Yau triangulated category and to a partial triangulation on a marked (unpunctured) Riemann surface. We show that, in the case where the category is the generalised cluster category associated to a surface, the coloured quivers coincide. We also show that compatible notions of mutation can be defined and give an explicit description in the case of a disk. A partial description is given in the general 2-Calabi-Yau case. We show further that Iyama-Yoshino reduction can be interpreted as cutting along an arc in the surface.
description: 29 pages, 17 figures. Discussion in Section 6 clarified and expanded. Some minor corrections, clarification of notation
Smartphone use undermines enjoyment of face-to-face social interactions
Creators: name: Dwyer, Ryan
Publisher: name: University of British Columbia
Year: 2018

description: Decades of research on human happiness points to one central conclusion: Engaging in positive social interactions is critical for well-being. The current smartphone revolution, however, may be altering how and when we derive these benefits. Using a field experiment and experience sampling, we found the first evidence that phone use may undermine the enjoyment people derive from real world social interactions. In Study 1, we recruited over 300 community members and students to share a meal at a restaurant with friends or family. Participants were randomly assigned to keep their phones on the table or to put their phones away during the meal. When phones were present (vs. absent), participants felt more distracted, which reduced how much they enjoyed spending time with their friends/family. We found consistent results using experience sampling in Study 2; during in-person interactions, participants felt more distracted and reported lower enjoyment if they used their phones than if they did not. This research suggests that despite their ability to connect us to others across the globe, phones may undermine the benefits we derive from interacting with those across the table.
Laboratory-based investigation of suspected mumps cases submitted to the German National Reference Centre for Measles, Mumps, and Rubella, 2008 to 2013
Creators: name: Mankertz, Annette
name: Beutel, Ulrike
name: Schmidt, Franz-Josef
name: Borgmann, Stefan
name: Wenzel, Jürgen J.
name: Ziegler, Peter
name: Weißbrich, Benedikt
name: Santibanez, Sabine
Publisher: name: Universität Regensburg
Year: 2015
Subjects: subject: SVFsecondary vaccine failure MuVmumps virus Uurine TSthroat swab OForal fluid CPEcytopathogenic effect CMCcarboxymethycellulose n.r.not reported
subject: 610 Medizin

description: From 2008 to 2013, sample sets from 534 patients displaying clinical symptoms of mumps were submitted to the German Reference Centre for Measles, Mumps and Rubella. Mumps virus infection was confirmed in 216 cases (40%) by PCR and/or serology. Confirmed cases were more frequently seen in male than in female patients (128 vs. 81); the age group predominantly affected was 15 to 29 years old (65%, median age: 26.4 years). The majority of the confirmed cases had a remote history of vaccination with one or two doses of a mumps-containing vaccine (69%). Our results indicate that mumps virus caused two outbreaks in Bavaria in 2008 and 2010/2011 and a third one in Lower Saxony in 2011. Mumps virus genotype G was preponderantly detected from 2008 to 2013. For 107 of the 216 patients with a confirmed mumps infection, we correlated the results from PCR and serology. PCR detected cases during the first week after onset of symptoms (74% positive results). PCR worked best with throat swabs and oral fluids (61% and 60% positive results, respectively). IgM was more reliable with a longer time after onset of symptoms (67%), but indirect IgM serology was of insufficient sensitivity for vaccinated mumps cases (30%); the IgM μ-capture assay detected more cases in this group. Mumps virus is able to initiate an infection in vaccinated patients (secondary vaccine failure, SVF) although it is unclear to what extent. Since SVF does occur in highly vaccinated populations and IgM will not increase to detectable levels in all SVF patients, we strongly recommend using PCR plus serology tests to avoid false-negative diagnoses in vaccinated individuals with clinical signs of mumps.
Generalized derivations of $ω$-Lie algebras
Creators: name: Chen, Yin
name: Ren, Shan
name: Shan, Jiawen
name: Zhang, Runxuan
Publisher: name: arXiv
Year: 2025
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 17B40

description: This article explores the structure theory of compatible generalized derivations of finite-dimensional $ω$-Lie algebras over a field $\mathbb{K}$. We prove that any compatible quasiderivation of an $ω$-Lie algebra can be embedded as a compatible derivation into a larger $ω$-Lie algebra, refining the general result established by Leger and Luks in 2000 for finite-dimensional nonassociative algebras. We also provide an approach to explicitly compute (compatible) generalized derivations and quasiderivations for all $3$-dimensional non-Lie complex $ω$-Lie algebras.
description: To appear in J. Algebra Appl. (2026) 2650206 (16 pages)
Spatial propagation of excitonic coherence enables ratcheted energy transfer
Creators: name: Hoyer, Stephan
name: Ishizaki, Akihito
name: Whaley, K. Birgitta
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: Biological Physics (physics.bio-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Experimental evidence shows that a variety of photosynthetic systems can preserve quantum beats in the process of electronic energy transfer, even at room temperature. However, whether this quantum coherence arises in vivo and whether it has any biological function have remained unclear. Here we present a theoretical model that suggests that the creation and recreation of coherence under natural conditions is ubiquitous. Our model allows us to theoretically demonstrate a mechanism for a ratchet effect enabled by quantum coherence, in a design inspired by an energy transfer pathway in the Fenna-Matthews-Olson complex of the green sulfur bacteria. This suggests a possible biological role for coherent oscillations in spatially directing energy transfer. Our results emphasize the importance of analyzing long-range energy transfer in terms of transfer between inter-complex coupling (ICC) states rather than between site or exciton states.
description: Accepted version for Phys. Rev. E. 14 pages, 7 figures
Pin^-(2)-monopole equations and intersection forms with local coefficients of 4-manifolds
Creators: name: Nakamura, Nobuhiro
Publisher: name: arXiv
Year: 2010
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57R57

description: We introduce a variant of the Seiberg-Witten equations, Pin^-(2)-monopole equations, and give its applications to intersection forms with local coefficients of 4-manifolds. The first application is an analogue of Froyshov's results on 4-manifolds which have definite forms with local coefficients. The second is a local coefficient version of Furuta's 10/8-inequality. As a corollary, we construct nonsmoothable spin 4-manifolds satisfying Rohlin's theorem and the 10/8-inequality.
description: 23 pages
“Bligh and Dyer” and Folch Methods for Solid–Liquid–Liquid Extraction of Lipids from Microorganisms. Comprehension of Solvatation Mechanisms and towards Substitution with Alternative Solvents
Creators: name: Breil, Cassandra
name: Abert Vian, Maryline
name: Zemb, Thomas
name: Kunz, Werner
name: Chemat, Farid
Publisher: name: Universität Regensburg
Year: 2017
Subjects: subject: Bligh and Dyer, Folch, bio-sourced solvent, yeast, lipids
subject: 540 Chemie

description: Bligh and Dyer (B & D) or Folch procedures for the extraction and separation of lipids from microorganisms and biological tissues using chloroform/methanol/water have been used tens of thousands of times and are “gold standards” for the analysis of extracted lipids. Based on the Conductor-like Screening MOdel for realistic Solvatation (COSMO-RS), we select ethanol and ethyl acetate as being potentially suitable for the substitution of methanol and chloroform. We confirm this by performing solid–liquid extraction of yeast (Yarrowia lipolytica IFP29) and subsequent liquid–liquid partition—the two steps of routine extraction. For this purpose, we consider similar points in the ternary phase diagrams of water/methanol/chloroform and water/ethanol/ethyl acetate, both in the monophasic mixtures and in the liquid–liquid miscibility gap. Based on high performance thin-layer chromatography (HPTLC) to obtain the distribution of lipids classes, and gas chromatography coupled with a flame ionisation detector (GC/FID) to obtain fatty acid profiles, this greener solvents pair is found to be almost as effective as the classic methanol–chloroform couple in terms of efficiency and selectivity of lipids and non-lipid material. Moreover, using these bio-sourced solvents as an alternative system is shown to be as effective as the classical system in terms of the yield of lipids extracted from microorganism tissues, independently of their apparent hydrophilicity.
Impact of Drosophila Models in the Study and Treatment of Friedreich’s Ataxia
Creators: name: Monnier, Véronique
name: Llorens, Jose
name: Navarro, Juan
Publisher: name: Universität Regensburg
Year: 2018
Subjects: subject: Drosophila melanogaster; Friedreich’s ataxia; frataxin; iron; oxidative stress; metal homeostasis; lipid metabolism; endoplasmic reticulum; genetic screens; drug screens
subject: 570 Biowissenschaften, Biologie
subject: 590 Tiere (Zoologie)

description: Drosophila melanogaster has been for over a century the model of choice of several neurobiologists to decipher the formation and development of the nervous system as well as to mirror the pathophysiological conditions of many human neurodegenerative diseases. The rare disease Friedreich’s ataxia (FRDA) is not an exception. Since the isolation of the responsible gene more than two decades ago, the analysis of the fly orthologue has proven to be an excellent avenue to understand the development and progression of the disease, to unravel pivotal mechanisms underpinning the pathology and to identify genes and molecules that might well be either disease biomarkers or promising targets for therapeutic interventions. In this review, we aim to summarize the collection of findings provided by the Drosophila models but also to go one step beyond and propose the implications of these discoveries for the study and cure of this disorder. We will present the physiological, cellular and molecular phenotypes described in the fly, highlighting those that have given insight into the pathology and we will show how the ability of Drosophila to perform genetic and pharmacological screens has provided valuable information that is not easily within reach of other cellular or mammalian models.
An unexplored side of regeneration niche: seed quantity and quality are determined by the effect of temperature on pollen performance
Creators: name: Rosbakh, Sergey
name: Pacini, Ettore
name: Nepi, Massimo
name: Poschlod, Peter
Publisher: name: Universität Regensburg
Year: 2018
Subjects: subject: Male gametophyte, Pollen germination, Pollen tube growth, regeneration niche, Seed number, seed size
subject: 580 Pflanzen (Botanik)

description: In 1977, Peter Grubb introduced the regeneration niche concept, which assumes that a plant species cannot persist if the environmental conditions are only suitable for adult plant growth and survival, but not for seed production, dispersal, germination and seedling establishment. During the last decade, this concept has received considerable research attention as it helps to better understand community assembly, population dynamics, and plant responses to environmental changes. Yet, in its present form, it focuses too much on the post-fertilization stages of plant sexual reproduction, neglecting the fact that the environment can operate as a constraint at many points in the chain of processes necessary for successful regeneration. In this review, we draw the attention of the plant ecology research community to the pre-fertilization stages of plant sexual reproduction, an almost ignored but important aspect of the regeneration niche, and their potential consequences for successful seed production. Particularly, we focus on how temperature effects pollen performance and determines plant reproduction success by playing an important role in the temporal and spatial variations in seed quality and quantity. We also review the pollen adaptations to temperature stresses at different levels of plant organization and discuss the plasticity of the performance of pollen under changing temperature conditions. The reviewed literature demonstrates that pre-fertilization stages of seed production, particularly the extreme sensitivity of male gametophyte performance to temperature, are the key determinants of a species’ regeneration niche. Thus, we suggest that previous views stating that the regeneration niche begins with the production of seeds should be modified to include the preceding stages. Lastly, we identify several gaps in pollen-related studies revealing a framework of opportunities for future research, particularly how these findings could be used in the field of plant biology and ecology.
Trade-offs In Quasi-Decentralized Massive MIMO
Creators: name: Alegría, Juan Vidal
name: Rusek, Fredrik
name: Sánchez, Jesús Rodríguez
name: Edfors, Ove
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: Information Theory (cs.IT)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Typical massive multiple-input multiple-output (MIMO) architectures consider a centralized approach, in which all baseband data received by each antenna has to be sent to a central processing unit (CPU) to be processed. Due to the enormous amount of antennas expected in massive MIMO base stations (BSs), the number of connections to the CPU required in centralized massive MIMO is not scalable. In recent literature decentralized approaches have been proposed to reduce the number of connections between the antennas and the CPU. However, the reduction in the connections to the CPU requires more outputs per antenna to be generated. We study the trade-off between number of connections to the CPU and number of outputs per antenna. We propose a generalized architecture that allows exploitation of this trade-off, and we define a novel matrix decomposition that allows lossless linear equalization within our proposed architecture.
description: 6 pages, 4 figures, accepted at IEEE ICC 2020 workshop on scalable massive MIMO technologies for beyond 5G
Guillain–Barré syndrome associated with autochthonous infection by hepatitis E virus subgenotype 3c
Creators: name: Scharn, N.
name: Ganzenmueller, T.
name: Wenzel, J. J.
name: Dengler, R.
name: Heim, A.
name: Wegner, F.
Publisher: name: Universität Regensburg
Year: 2014
Subjects: subject: Guillain–Barré syndrome, Hepatitis E virus, Subgenotype 3c
subject: 610 Medizin

description: In this report, we present a case of a 50-year-old immunocompetent man with Guillain–Barré syndrome (GBS) associated with an autochthonous hepatitis E virus (HEV) infection. The patient presented with tetraparesis and elevated liver enzymes. HEV infection was confirmed serologically and by polymerase chain reaction (PCR) from blood and stool. Phylogenetic analysis revealed a novel HEV genotype 3 isolate closely related to other subgenotype 3c isolates from pig livers purchased in Germany. This indicates an autochthonous, potentially food-related hepatitis E and is, to our knowledge, the first report about a neurological syndrome associated with an HEV subgenotype 3c infection.
Cooperative resonance linewidth narrowing in a planar metamaterial
Creators: name: Jenkins, S. D.
name: Ruostekoski, J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optics (physics.optics)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We theoretically analyze the experimental observations of a spectral line collapse in a metamaterial array of asymmetric split ring resonators [Fedotov et al., Phys. Rev. Lett. 104, 223901 (2010)]. We show that the ensemble of closely-spaced resonators exhibits cooperative response, explaining the observed system-size dependent narrowing of the transmission resonance linewidth. We further show that this cooperative narrowing depends sensitively on the lattice spacing and that significantly stronger narrowing could be achieved in media with suppressed ohmic losses.
description: 19 pages, 6 figures, to appear in New Journal of Physics
Application of Corey-Bakshi-Shibata, Corey-Kim, Corey-Seebach, Corey-Winter, Corey-Link, and Corey-Ganem-Gilman in organic and total synthesis
Creators: name: Mommahed Heravi, Majid
name: Asadi, Shima
name: Nazari, Niousha
name: Lashkariani, Boshra Malekzadeh
Publisher: name: figshare
Year: 2022
Subjects: subject: 30303 Optical Properties of Materials
subject: FOS: Chemical sciences
subject: 30302 Nanochemistry and Supramolecular Chemistry
subject: 30701 Quantum Chemistry
subject: 39904 Organometallic Chemistry
subject: Organic Chemistry
subject: 30502 Natural Products Chemistry
subject: 30599 Organic Chemistry not elsewhere classified
subject: 30205 Non-metal Chemistry
subject: Nuclear Chemistry
subject: 30504 Organic Green Chemistry

description: In the continuation of our studies on the Coreybased reactions, in this review, we try to underscore the applications of Corey-Bakshi-Shibata, Corey-Kim oxidation, Corey-Winter, Corey-Link, and Corey-Ganem-Gilman reactions in synthetic organic chemistry and total synthesis of natural products. Due to their wide spectrum of applications, they achieved the status being included in name reactions in organic chemistry.
The blob complex
Creators: name: Morrison, Scott
name: Walker, Kevin
Publisher: name: arXiv
Year: 2010
Subjects: subject: Algebraic Topology (math.AT)
subject: Category Theory (math.CT)
subject: Geometric Topology (math.GT)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 57R56

description: Given an n-manifold M and an n-category C, we define a chain complex (the "blob complex") B_*(M;C). The blob complex can be thought of as a derived category analogue of the Hilbert space of a TQFT, and as a generalization of Hochschild homology to n-categories and n-manifolds. It enjoys a number of nice formal properties, including a higher dimensional generalization of Deligne's conjecture about the action of the little disks operad on Hochschild cochains. Along the way, we give a definition of a weak n-category with strong duality which is particularly well suited for work with TQFTs.
description: 106 pages. Version 3 contains many improvements following suggestions from the referee and others, and some additional material
Rapio-scan acousto-optical delay line with 34 kHz scan rate and 15 as precision
Creators: name: Schubert, Olaf
name: Eisele, Max
name: Crozatier, V.
name: Forget, N.
name: Kaplan, D.
name: Huber, Rupert
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: 530 Physik

description: An optical fast scan delay exploiting the near-collinear interaction between a train of ultrashort optical pulses and an acoustic wave propagating in a birefringent crystal is introduced. In combination with a femtosecond Er:fiber laser, the scheme is shown to delay few femtosecond pulses by up to 6 ps with a precision of 15 as. A resolution of 5 fs is obtained for a single sweep at a repetition rate of 34 kHz. This value can be improved to 39 as for multiple scans at a total rate of 0.3 kHz.
Spectral Statistics of Erd{\H o}s-Rényi Graphs II: Eigenvalue Spacing and the Extreme Eigenvalues
Creators: name: Erdos, Laszlo
name: Knowles, Antti
name: Yau, Horng-Tzer
name: Yin, Jun
Publisher: name: arXiv
Year: 2011
Subjects: subject: Probability (math.PR)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 15B52, 60B20, 05C80

description: We consider the ensemble of adjacency matrices of Erd{\H o}s-Rényi random graphs, i.e.\ graphs on $N$ vertices where every edge is chosen independently and with probability $p \equiv p(N)$. We rescale the matrix so that its bulk eigenvalues are of order one. Under the assumption $p N \gg N^{2/3}$, we prove the universality of eigenvalue distributions both in the bulk and at the edge of the spectrum. More precisely, we prove (1) that the eigenvalue spacing of the Erd{\H o}s-Rényi graph in the bulk of the spectrum has the same distribution as that of the Gaussian orthogonal ensemble; and (2) that the second largest eigenvalue of the Erd{\H o}s-Rényi graph has the same distribution as the largest eigenvalue of the Gaussian orthogonal ensemble. As an application of our method, we prove the bulk universality of generalized Wigner matrices under the assumption that the matrix entries have at least $4 + ε$ moments.
Markers of Protection in Children and Adolescents Six to Fourteen Years After Primary Hepatitis B Vaccination in Real Life
Creators: name: Brunskole Hummel, Irena
name: Huber, Barbara
name: Wenzel, Jürgen J.
name: Jilg, Wolfgang
Publisher: name: Universität Regensburg
Year: 2016
Subjects: subject: hepatitis B, vaccination, long-term immunity, real-life study, infants, children
subject: 610 Medizin

description: BACKGROUND: Not many data are available on long-term immunity against hepatitis B (HB) for children vaccinated under real-life conditions. METHODS: Two hundred and thirty-two children and adolescents vaccinated 6-14 years earlier in pediatric practices were examined for conditions of vaccination and markers of protection as anti-HBs, anamnestic response to a booster dose and cell-mediated immunity. RESULTS: Fifty-six percent of the participants were vaccinated according to the German vaccination recommendations (group 1). In 44.0% (group 2), these recommendations were not followed. Anti-HBs concentrations of ≥10 IU/L were found in 53.1% of group 1 and 45.1% of group 2 participants. A booster dose resulted in 91 of 99 participants in having an anamnestic response, in 3 (5.9%) of group 1 and 5 (10.4%) of group 2 anti-HBs remained below 10 IU/L. In group 1, postbooster anti-HBs concentration was inversely correlated with time since the last vaccination. Cellular immune responses were seen in only 5% of revaccinated individuals before the booster, increasing to 30% thereafter. CONCLUSIONS: Under real-life conditions about half of vaccinees have lost protecting antibodies 6-14 years after vaccination in infancy, but in approximately 90% of them, immune memory was demonstrated. However, as memory may wane, revaccination at a time when boostability is still present might be considered.
Existence of parabolic minimizers to the total variation flow on metric measure spaces
Creators: name: Buffa, Vito
name: Collins, Michael
name: Camacho, Cintia Pacchiano
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: Functional Analysis (math.FA)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 49J27, 49J40, 49J45, 30L99, 35A15

description: We give an existence proof for variational solutions $u$ associated to the total variation flow. Here, the functions being considered are defined on a metric measure space $(\mathcal{X}, d, μ)$ satisfying a doubling condition and supporting a Poincaré inequality. For such parabolic minimizers that coincide with a time-independent Cauchy-Dirichlet datum $u_0$ on the parabolic boundary of a space-time-cylinder $Ω\times (0, T)$ with $Ω\subset \mathcal{X}$ an open set and $T > 0$, we prove existence in the weak parabolic function space $L^1_w(0, T; \mathrm{BV}(Ω))$. In this paper, we generalize results from a previous work by Bögelein, Duzaar and Marcellini by introducing a more abstract notion for $\mathrm{BV}$-valued parabolic function spaces. We argue completely on a variational level.
description: Accepted, to appear in Manuscripta Math
Ribavirin treatment of acute and chronic hepatitis E: a single-centre experience
Creators: name: Pischke, Sven
name: Hardtke, Svenja
name: Bode, Ulrike
name: Birkner, Stephan
name: Chatzikyrkou, Christos
name: Kauffmann, Wolfgang
name: Bara, Christoph L.
name: Gottlieb, Jens
name: Wenzel, Juergen
name: Manns, Michael P.
name: Wedemeyer, Heiner
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: acute liver failure – hepatitis E – HEV – ribavirin – transplantation – treatment
subject: 610 Medizin

description: Background The role of ribavirin for treatment of severe acute or chronic hepatitis E virus (HEV) infection is not well defined. Aims To investigate the applicability and efficacy of ribavirin therapy in acute and chronic HEV infections within a large single‐centre cohort. Materials & Methods Clinical courses of forty‐four German HEV‐infected individuals were analysed. Results In a prospective case series, we observed spontaneous recovery from acute symptomatic HEV‐infection in 10/11 immunocompetent individuals. Ribavirin therapy was initiated in one patient with severe acute HEV‐genotype‐1e infection who rapidly improved liver function and cleared HEV. Of 15 organ transplant recipients with prolonged HEV viraemia, reduction in immunosuppression led to HEV‐clearance in three patients, while ribavirin therapy was initiated in 11 subjects. A rapid response with undetectable HEV‐RNA occurred in nine subjects. One patient died after experiencing a virological breakthrough associated with ribavirin dose reduction because of severe anaemia. Discussion Ribavirin is a safe treatment option for HEV infections. However, the optimal dose of ribavirin for the treatment of chronic hepatitis E remains to be determined as treatment failure may occur.
Transport coefficients in composites
Creators: name: Dimitrov, K.
name: Radoev, B.
name: Tsekov, R.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The Maxwell approach from electrostatics is applied for calculation of transport coefficients in composites. The viscosity of a dilute emulsion is obtained as a function of the volume fraction of dispersed phase. The derived new formula is asymptotically correct and more general than the linear relationships usually used. The method is applied also for description of the influence of fluctuations on the transport coefficients.
title: Ландшафтная организация рекреационных загородных пространств университета
Creators: name: Иванищева, Екатерина
name: Робежник, Любовь
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2021

description: В статье исследуются вопросы, связанные с процессом организации и развития загородных рекреационных зон высших учебных заведений. Загородная база отдыха университета трактуется как пространство, где смогут отдыхать и участвовать в выездных мероприятиях студенты, преподаватели и гости вуза. Анализируются результаты апробации современных подходов на примере турбазы «Наволоки» Новгородского государственного
университета. Обосновывается предположение, что загородное пространство вуза посредствам организации социально-культурной и коммуникативной функций с помощью средств ландшафтного дизайна создает условия для неформального общения в различных форматах, активизирует рост творческой активности.
Measuring anisotropic spin relaxation in graphene
Creators: name: Ringer, Sebastian
name: Hartl, Stefan
name: Rosenauer, Matthias
name: Völkl, Tobias
name: Kadur, Maximilian
name: Hopperdietzel, Franz
name: Weiss, Dieter
name: Eroms, Jonathan
Publisher: name: Universität Regensburg
Year: 2018
Subjects: subject: 530 Physik

description: We compare different methods to measure the anisotropy of the spin lifetime in graphene. In addition to out-of-plane rotation of the ferromagnetic electrodes and oblique spin precession, we present a Hanle experiment where the electron spins precess around either a magnetic field perpendicular to the graphene plane or around an in-plane field. In the latter case, electrons are subject to both in-plane and out-of-plane spin relaxation. To fit the data, we use a numerical simulation that can calculate precession with anisotropies in the spin lifetimes under magnetic fields in any direction. Our data show a small, but distinct anisotropy that can be explained by the combined action of isotropic mechanisms, such as relaxation by the contacts and resonant scattering by magnetic impurities, and an anisotropic Rashba spin-orbit based mechanism. We also assess potential sources of error in all three types of experiment and conclude that the in-plane/out-of-plane Hanle method is most reliable.
New Technology in India's Agriculture and Outlook for Grain Production
Creators: name: Parker, John B.
name: Parker, John B.
Publisher: name: Unknown
Year: 1972
Subjects: subject: Agricultural and Food Policy
subject: Crop Production/Industries
subject: International Development
subject: International Relations/Trade
subject: Labor and Human Capital
subject: Land Economics/Use
subject: Productivity Analysis
subject: Research and Development/Tech Change/Emerging Technologies
subject: India
subject: Green Revolution
subject: Technology
subject: Inputs
subject: Projections

description: India's agriculture is changing fast because of greater use of high-yielding seed varieties, insecticides, and machinery; increased multiple-cropping; and expansion of irrigated area. The rapid growth in agricultural production that characterized the late 1960 's is expected to continue during the 1970's. New factories now manufacture most of the fertilizer and tractors purchased by Indian farmers. Government price policies and development programs are designed to encourage greater agricultural production. Although India's food grain production is projected to total 144 million metric tons in 1980, some imports are still likely to be needed.
Assessment of a potential therapeutic target in the Hedgehog pathway for the eradication of primitive chronic myeloid leukemia cells
Creators: name: Turner, Kelly Anne
Publisher: name: University of British Columbia
Year: 2018

description: Chronic myeloid leukemia (CML) is a hematological malignancy characterized by the presence of a novel fusion oncoprotein called BCR-ABL1 in a hematopoietic stem cell. BCR-ABL1 has constitutively active tyrosine kinase activity and deregulates many intracellular signaling pathways contributing to cancer formation, maintenance, and progression. The consistent genetic aberration of BCR-ABL1 in CML led to the development of the first molecularly-targeted cancer therapy called imatinib (IM), which revolutionized the treatment of early phase CML. However, IM is not curative, and 40% of patients with advanced CML experience primary intolerance or acquire resistance to IM. In addition, leukemic stem cells (LSCs) are relatively insensitive to IM and do not exclusively rely on BCR-ABL1 for survival. Therefore, it is important to investigate alternative pathways that are critical for LSC maintenance, to develop a strategy to eradicate them. The Hedgehog (HH) pathway, and particularly the protein Smoothened (SMO), has recently been described to be essential for CML LSCs in a mouse model. I hypothesized that the HH pathway was critical for the survival of CML stem/progenitor cells, and that dual inhibition of BCR-ABL1 and SMO would be superior to either alone in killing CML LSCs. I used a variety of biological and molecular assays to investigate expression changes of several HH pathway-associated genes and the functionality of different leukemic cell subsets from primary CML patient samples. I observed that HH pathway genes SMO and GLI2 were upregulated in CML compared with healthy bone marrow controls, and were more highly expressed in CD34⁺ cells from IM non-responders as compared with responders. In addition, these genes were most highly expressed in the stem cell-enriched Lin-CD34⁺CD38ˉ subpopulation in IM non-responders compared with progenitors and mature leukemic cells in the same patients. I also observed that CD34⁺ IM non-responder cells were more sensitive to SMO inhibition compared with responders in terms of viability, apoptosis, re-plating potential, and colony-forming ability following long-term culture. Taken together, my results support the hypothesis that the HH pathway is more critical for primitive CML cells from IM non-responders, and may represent a mechanism by which drug-resistant cells evade eradication by TKIs.
Derived categories of the Cayley plane and the coadjoint Grassmannian of type F
Creators: name: Belmans, Pieter
name: Kuznetsov, Alexander
name: Smirnov, Maxim
Publisher: name: arXiv
Year: 2020
Subjects: subject: Algebraic Geometry (math.AG)
subject: Representation Theory (math.RT)
subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics

description: For the derived category of the Cayley plane, which is the cominuscule Grassmannian of Dynkin type $\mathrm{E}_6$, a full Lefschetz exceptional collection was constructed by Faenzi and Manivel. A general hyperplane section of the Cayley plane is the coadjoint Grassmannian of Dynkin type $\mathrm{F}_4$. We show that the restriction of the Faenzi-Manivel collection to such a hyperplane section gives a full Lefschetz exceptional collection, providing the first example of a full exceptional collection on a homogeneous variety of Dynkin type $\mathrm{F}$. We also describe the residual categories of these Lefschetz collections, confirming conjectures of the second and third named author for the Cayley plane and its hyperplane section. The latter description is based on a general result of independent interest, relating residual categories of a variety and its hyperplane section.
description: Final version. To appear in Transformation Groups