cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Loop Quantum Gravity Phenomenology: Linking Loops to Observational Physics
Creators: name: Girelli, Florian
name: Hinterleitner, Franz
name: Major, Seth A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Research during the last decade demonstrates that effects originating on the Planck scale are currently being tested in multiple observational contexts. In this review we discuss quantum gravity phenomenological models and their possible links to loop quantum gravity. Particle frameworks, including kinematic models, broken and deformed Poincaré symmetry, non-commutative geometry, relative locality and generalized uncertainty principle, and field theory frameworks, including Lorentz violating operators in effective field theory and non-commutative field theory, are discussed. The arguments relating loop quantum gravity to models with modified dispersion relations are reviewed, as well as, arguments supporting the preservation of local Lorentz invariance. The phenomenology related to loop quantum cosmology is briefly reviewed, with a focus on possible effects that might be tested in the near future. As the discussion makes clear, there remains much interesting work to do in establishing the connection between the fundamental theory of loop quantum gravity and these specific phenomenological models, in determining observational consequences of the characteristic aspects of loop quantum gravity, and in further refining current observations. Open problems related to these developments are highlighted. characteristic aspects of loop quantum gravity, and in further refining current observations. Open problems related to these developments are highlighted.
description: Invited review for SIGMA Special Issue "Loop Quantum Gravity and Cosmology"
A bioinspired oxoiron(iv) motif supported on a N2S2 macrocyclic ligand
Creators: name: Deutscher, Jennifer
name: Gerschel, Philipp
name: Warm, Katrin
name: Kuhlmann, Uwe
name: Mebs, Stefan
name: Haumann, Michael
name: Dau, Holger
name: Hildebrandt, Peter
name: Apfel, Ulf-Peter
name: Ray, Kallol
Publisher: name: Freie Universität Berlin
Year: 2021
Subjects: subject: mononuclear oxoiron
subject: sulfur-ligated oxoiron
subject: key oxidants
subject: 500 Naturwissenschaften und Mathematik::540 Chemie::540 Chemie und zugeordnete Wissenschaften

description: A mononuclear oxoiron(iv) complex 1-trans bearing two equatorial sulfur ligations is synthesized and characterized as an active-site model of the elusive sulfur-ligated Fe-IV = O intermediates in non-heme iron oxygenases. The introduction of sulfur ligands weakens the Fe = O bond and enhances the oxidative reactivity of the Fe-IV = O unit with a diminished deuterium kinetic isotope effect, thereby providing a compelling rationale for nature's use of the cis-thiolate ligated oxoiron(iv) motif in key metabolic transformations.
Chronic diseases and allergies are risk factors predictive of a history of Medial Tibial Stress Syndrome (MTSS) in distance runners: SAFER study XXIV
Creators: name: Boer, Pieter-Henk
name: Schwellnus, Martin P.
name: Jordaan, Esmè
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Medicine
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Sociology
subject: FOS: Sociology
subject: 60506 Virology
subject: FOS: Biological sciences

description: Medial Tibial Stress Syndrome (MTSS) is one of the most common causes of exercise-associated lower leg pain in distance runners. To identify risk factors predictive of a history of MTSS in distance runners entering the Two Oceans Marathon races (21.1 km and 56 km). Cross-sectional study. 2012 to 2015 Two Oceans Marathon races (21.1 km and 56 km). Consenting race entrants. 106,743 race entrants completed an online pre-race medical screening questionnaire. 76,654 consenting runners (71.8%) were studied. 558 verified MTSS injuries were reported in the previous 12 months. Risk factors predictive of a history of MTSS were explored using uni – & multivariate analyses: demographics (race distance, sex, and age groups), training/racing history, history of chronic diseases, allergies, and medication use. Independent risk factors predictive of a history of MTSS (adjusted for sex, age group, and race distance) were a higher chronic disease composite score (PR = 3.1 times increase risk for every two additional chronic diseases; p < 0.0001) and a history of allergies (PR = 1.9; p < 0.0001). Chronic diseases (PR > 2) predictive of a history of MTSS were: symptoms of CVD (PR = 4.2; p < 0.0001); GIT disease (PR = 3.3; p < 0.0001); kidney/bladder disease (PR = 3.3; p < 0.0001); nervous system/psychiatric disease (PR = 3.2; p < 0.0001); respiratory disease (PR = 2.9; p < 0.0001) a history of CVD (PR = 2.9; p < 0.0001); and risk factors of CVD (PR = 2.4; p < 0.0001) (univariate analysis). Average running speed was associated with higher risk of MTSS. Novel independent risk factors predictive of a history of MTSS in distance runners (56 km, 21.1 km) were multiple chronic diseases and a history of allergies. Identifying athletes at higher risk for MTSS can guide healthcare professionals in their prevention and rehabilitation efforts.
Principal components of dark energy with SNLS supernovae: the effects of systematic errors
Creators: name: Ruiz, Eduardo J.
name: Shafer, Daniel L.
name: Huterer, Dragan
name: Conley, Alexander
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the effects of current systematic errors in Type Ia supernova (SN Ia) measurements on dark energy (DE) constraints using current data from the Supernova Legacy Survey (SNLS). We consider how SN systematic errors affect constraints from combined SN Ia, baryon acoustic oscillations (BAO), and cosmic microwave background (CMB) data, given that SNe Ia still provide the strongest constraints on DE but are arguably subject to more significant systematics than the latter two probes. We focus our attention on the temporal evolution of DE described in terms of principal components (PCs) of the equation of state, though we examine a few of the more common, simpler parametrizations as well. We find that the SN Ia systematics degrade the total generalized figure of merit (FoM), which characterizes constraints in multi-dimensional DE parameter space, by a factor of two to three. Nevertheless, overall constraints obtained on more than five PCs are very good even with current data and systematics. We further show that current constraints are robust to allowing for the finite detection significance of the BAO feature in galaxy surveys.
description: 13 pages, 11 figures
K. Zechiel-Eckes, Florus von Lyon als Kirchenpolitiker und Publizist. Studien zur Persönlichkeit eines karolingischen 'Intellektuellen' am Beispiel der Auseinandersetzung mit Amalarius (835-838) und des Prädestinationsstreits (851-855), 1999
Creators: name: Magnou-Nortier, E.
Publisher: name: Francia
Year: 2019

description: Francia, Bd. 28 Nr. 1 (2001)
Sustainable Cathodes for Lithium‐Ion Energy Storage Devices Based on Tannic Acid—Toward Ecofriendly Energy Storage
Creators: name: Ilic, Ivan K.
name: Tsouka, Alexandra
name: Perovic, Milena
name: Hwang, Jinyeon
name: Heil, Tobias
name: Loeffler, Felix F.
name: Oschatz, Martin
name: Antonietti, Markus
name: Liedel, Clemens
Publisher: name: Freie Universität Berlin
Year: 2021
Subjects: subject: biomass
subject: electrochemistry
subject: energy storage
subject: redox chemistry
subject: sustainability
subject: tannic acid
subject: 500 Naturwissenschaften und Mathematik::540 Chemie::540 Chemie und zugeordnete Wissenschaften

description: The use of organic materials with reversible redox activity holds enormous potential for next-generation Li-ion energy storage devices. Yet, most candidates are not truly sustainable, i.e., not derived from renewable feedstock or made in benign reactions. Here an attempt is reported to resolve this issue by synthesizing an organic cathode material from tannic acid and microporous carbon derived from biomass. All constituents, including the redox-active material and conductive carbon additive, are made from renewable resources. Using a simple, sustainable fabrication method, a hybrid material is formed. The low cost and ecofriendly material shows outstanding performance with a capacity of 108 mAh g(-1) at 0.1 A g(-1) and low capacity fading, retaining approximately 80% of the maximum capacity after 90 cycles. With approximately 3.4 V versus Li+/Li, the cells also feature one of the highest reversible redox potentials reported for biomolecular cathodes. Finally, the quinone-catecholate redox mechanism responsible for the high capacity of tannic acid is confirmed by electrochemical characterization of a model compound similar to tannic acid but without catecholic groups.
C.-P. Hasse, Die welfischen Hofämter und die welfische Ministerialität in Sachsen. Studien zur Sozialgeschichte des 12. und 13. Jahrhunderts, 1995
Creators: name: Moeglin, J.-M.
Publisher: name: Francia
Year: 2019

description: Francia, Bd. 28 Nr. 1 (2001)
Phosphatidylglyerol Lipid Binding at the Active Site of an Intramembrane Protease
Creators: name: Bondar, Ana-Nicoleta
Publisher: name: Freie Universität Berlin
Year: 2020
Subjects: subject: Lipid-protein coupling
subject: Intramembrane protease
subject: GlpG
subject: Phosphatidylglycerol
subject: Hydrogen bonding
subject: 500 Naturwissenschaften und Mathematik::570 Biowissenschaften; Biologie::570 Biowissenschaften; Biologie

description: Transmembrane substrate cleavage by the small Escherichia coli rhomboid protease GlpG informs on mechanisms by which lipid interactions shape reaction coordinates of membrane-embedded enzymes. Here, I review and discuss new work on the molecular picture of protein-lipid interactions that might govern the formation of the substrate-enzyme complex in fluid lipid membranes. Negatively charged PG-type lipids are of particular interest, because they are a major component of bacterial membranes. Atomistic computer simulations indicate POPG and DOPG lipids bridge remote parts of GlpG and might pre-occupy the substrate-docking site. Inhibition of catalytic activity by PG lipids could arise from ligand-like lipid binding at the active site, which could delay or prevent substrate docking. Dynamic protein-lipid H-bond networks, water access to the active site, and fluctuations in the orientation of GlpG suggest that GlpG has lipid-coupled dynamics that could shape the energy landscape of transmembrane substrate docking.
A critical analysis of metaphors used in Arabic and English cosmetics advertisements
Creators: name: Alnajjar, Ayah
name: Altakhaineh, Abdel Rahman Mitib
Publisher: name: Kervan. International Journal of African and Asian Studies
Year: 2023

description: This study aims to critically analyze metaphors employed in Arabic cosmetics advertisements and compare them to those used in English advertisements. A specialized corpus including 250 advertisements (125 Arabic advertisements and 125 English ones) of different cosmetics products was compiled. The method adopted for data analysis was based on Charteris-Black’s (2004) Critical Metaphor Analysis framework (CMA). Data analysis demonstrated that advertisers in the context of cosmetics advertisements use different conceptual metaphors to depict cosmetics, beauty, skin/hair care and skin/hair. The findings revealed that both languages share 5 conceptual metaphors out of 10. Moreover, some metaphors reveal how both Arabs and Westerners perceive the beauty of skin or hair.
description: Kervan. International Journal of African and Asian Studies, V. 27 N. 1 (2023): Kervan 27, 2023
P. Thorau, König Heinrich (VII.), das Reich und die Territorien. Untersuchungen zur Phase der Minderjährigkeit und der »Regentschaften« Erzbischof Engelberts I. von Köln und Herzog Ludwigs I. von Bayern (1211) 1220–1228, 1998
Creators: name: Dufour, J.
Publisher: name: Francia
Year: 2019

description: Francia, Bd. 28 Nr. 1 (2001)
Multidimensional Hydrogen Tunneling in Supported Molecular Switches: The Role of Surface Interactions
Creators: name: Litman, Yair
name: Rossi, Mariana
Publisher: name: Freie Universität Berlin
Year: 2020
Subjects: subject: Physical Chemistry
subject: Isotope effect
subject: Surfaces
subject: 500 Naturwissenschaften und Mathematik::540 Chemie::540 Chemie und zugeordnete Wissenschaften

description: The nuclear tunneling crossover temperature (T-c) of hydrogen transfer reactions in supported molecular-switch architectures can lie close to room temperature. This calls for the inclusion of nuclear quantum effects (NQEs) in the calculation of reaction rates even at high temperatures. However, computations of NQEs relying on standard parametrized dimensionality-reduced models quickly become inadequate in these environments. In this Letter, we study the paradigmatic molecular switch based on porphycene molecules adsorbed on metallic surfaces with full-dimensional calculations that combine density-functional theory for the electrons with the semiclassical ring-polymer instanton approximation for the nuclei. We show that the double intramolecular hydrogen transfer (DHT) rate can be enhanced by orders of magnitude due to surface fluctuations in the deep-tunneling regime. We also explain the origin of an Arrhenius temperature dependence of the rate below T-c and why this dependence differs at different surfaces. We propose a simple model to rationalize the temperature dependence of DHT rates spanning diverse fcc [110] surfaces.
Refusal strategies used by Jordanians and Syrian refugees in Jordan
Creators: name: Alshmaseen, Oraib Mousa
name: Jarrah, Marwan
name: Alghazo, Sharif
Publisher: name: Kervan. International Journal of African and Asian Studies
Year: 2023

description: This study investigates the use and linguistic properties of refusal strategies by Jordanians and Syrian refugees in Jordan. To achieve this objective, a Discourse Completion Test (DCT), consisting of 10 situations: three requests, three offers, two invitations, and two suggestions was used. The participants were 40 (20 male and 20 female) Jordanians and 40 (20 male and 20 female) Syrian refugees in Jordan. The mixed-method data analysis resulted in a total of 1351 refusals: 719 Jordanian refusals and 632 Syrian refugees’ refusals. The refusals were classified by semantic formulas, directness (a dimension of communication style), and frequency of semantic formulas. The results show that the two groups utilize different semantic formulas with different frequencies when making their refusals. The two groups used a different number of direct and indirect formulas. Although the two groups belong to the Arabic culture, the differences were significant. One main difference is that Jordanians’ refusals were more direct and were often expressed as negative willingness, while the Syrian refugees’ refusals were less direct, providing an explanation of their refusals. The results also indicate that gender is a significant variable where females in the two samples tended to respond with lengthy responses when making their refusals, employing at least three refusal strategies.
description: Kervan. International Journal of African and Asian Studies, V. 27 N. 1 (2023): Kervan 27, 2023
The $p(γ,K^+)Λ$ reaction: consistent high-spin interactions and Bayesian inference of its resonance content
Creators: name: Vrancx, Tom
name: De Cruz, Lesley
name: Ryckebusch, Jan
name: Vancraeyveld, Pieter
Publisher: name: arXiv
Year: 2012
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A Bayesian analysis of the world's $p(γ,K^+)Λ$ data is presented. We adopt a Regge-plus-resonance framework featuring consistent interactions for nucleon resonances up to spin $J = 5/2$. The power of the momentum dependence of the consistent interaction structure rises with the spin of the resonance. This leads to unphysical structures in the energy dependence of the computed cross sections when the short-distance physics is cut off with standard hadronic form factors. A plausible, spin-dependent modification of the hadronic form factor is proposed which suppresses the unphysical artifacts. Next, we evaluate all possible combinations of 11 candidate resonances. The best model is selected from the 2048 model variants by calculating the Bayesian evidence values against the world's $p(γ,K^+)Λ$ data. From the proposed selection of 11 resonances, we find that the following nucleon resonances have the highest probability of contributing to the reaction: $S_{11}(1535)$, $S_{11}(1650)$, $F_{15}(1680)$, $P_{13}(1720)$, $D_{13}(1900)$, $P_{13}(1900)$, $P_{11}(1900)$, and $F_{15}(2000)$.
description: 5 pages, 4 figures
Urkunden- und Quellenbuch zur Geschichte der altluxemburgischen Territorien bis zur burgundischen Zeit, begründet von Camile Wampach. Bd. XI: Die Urkunden Graf Johannes des Blinden (1310-1346), Teil 1: Die Urkunden aus Luxemburger Archivbeständen, hg. von A. Estgen, M. Pauly, J. Schroeder, 1997
Creators: name: Parisse, M.
Publisher: name: Francia
Year: 2019

description: Francia, Bd. 28 Nr. 1 (2001)
vh@nnlo - Higgs Strahlung at hadron colliders
Creators: name: Brein, Oliver
name: Harlander, Robert V.
name: Zirke, Tom J. E.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A numerical program for the evaluation of the inclusive cross section for associated Higgs production with a massive weak gauge boson at hadron colliders is described, sigma(pp/pbar p -> HV), V=W,Z. The calculation is performed in the framework of the Standard Model and includes next-to-next-to-leading order QCD as well as next-to-leading order electro-weak effects.
description: 16 pages, 4 Figures; v2: reference added, some typos removed, version published in CPC
Methane dynamics in three different Siberian water bodies under winter and summer conditions
Creators: name: Bussmann, Ingeborg
name: Fedorova, Irina
name: Juhls, Bennet
name: Overduin, Pier Paul
name: Winkel, Matthias
Publisher: name: Freie Universität Berlin
Year: 2021
Subjects: subject: Arctic regions
subject: water bodies
subject: atmospheric methane
subject: 500 Naturwissenschaften und Mathematik::550 Geowissenschaften, Geologie::550 Geowissenschaften

description: Arctic regions and their water bodies are affected by a rapidly warming climate. Arctic lakes and small ponds are known to act as an important source of atmospheric methane. However, not much is known about other types of water bodies in permafrost regions, which include major rivers and coastal bays as a transition type between freshwater and marine environments. We monitored dissolved methane concentrations in three different water bodies (Lena River, Tiksi Bay, and Lake Golzovoye, Siberia, Russia) over a period of 2 years. Sampling was carried out under ice cover (April) and in open water (July-August). The methane oxidation (MOX) rate and the fractional turnover rate (k') in water and melted ice samples from the late winter of 2017 was determined with the radiotracer method. In the Lena River winter methane concentrations were a quarter of the summer concentrations (8 nmol L-1 vs. 31 nmol L-1), and mean winter MOX rate was low (0.023 nmol L-1 d(-1)). In contrast, Tiksi Bay winter methane concentrations were 10 times higher than in summer (103 nmol L-1 vs. 13 nmol L-1). Winter MOX rates showed a median of 0.305 nmol L-1 d(-1). In Lake Golzovoye, median methane concentrations in winter were 40 times higher than in summer (1957 nmol L-1 vs. 49 nmol L-1). However, MOX was much higher in the lake (2.95 nmol L-1 d(-1)) than in either the river or bay. The temperature had a strong influence on the MOX (Q(10) = 2.72 +/- 0.69). In summer water temperatures ranged from 7-14 degrees C and in winter from -0.7 to 1.3 degrees C. In the ice cores a median methane concentration of 9 nM was observed, with no gradient between the ice surface and the bottom layer at the ice-water interface. MOX in the (melted) ice cores was mostly below the detection limit. Comparing methane concentrations in the ice with the underlaying water column revealed methane concentration in the water column 100-1000 times higher. The winter situation seemed to favor a methane accumulation under ice, especially in the lake with a stagnant water body. While on the other hand, in the Lena River with its flowing water, no methane accumulation under ice was observed. In a changing, warming Arctic, a shorter ice cover period is predicted. With respect to our study this would imply a shortened time for methane to accumulate below the ice and a shorter time for the less efficient winter MOX. Especially for lakes, an extended time of ice-free conditions could reduce the methane flux from the Arctic water bodies.
Single-spin asymmetries in inclusive deep inelastic scattering and multiparton correlations in the nucleon
Creators: name: Metz, A.
name: Pitonyak, D.
name: Schaefer, A.
name: Schlegel, M.
name: Vogelsang, W.
name: Zhou, J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Transverse single-spin asymmetries in inclusive deep inelastic lepton-nucleon scattering can be generated through multiphoton exchange between the leptonic and the hadronic part of the process. Here we consider the two-photon exchange, and mainly focus on the transverse target spin asymmetry. In particular, we investigate the case where two photons couple to different quarks. Such a contribution involves a quark-photon-quark correlator in the nucleon, which has a (model-dependent) relation to the Efremov-Teryaev-Qiu-Sterman quark-gluon-quark correlator T_F. Using different parametrizations for T_F we compute the transverse target spin asymmetries for both a proton and a neutron target and compare the results to recent experimental data. In addition, potential implications for our general understanding of single-spin asymmetries in hard scattering processes are discussed.
description: Discussion and references added, to appear in Physical Review D
Relaxation dynamics in type-II superconductors with point-like and correlated disorder
Creators: name: Dobramysl, Ulrich
name: Assi, Hiba
name: Pleimling, Michel
name: Täuber, Uwe C.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We employ an elastic line model to investigate the steady-state properties and non-equilibrium relaxation kinetics of magnetic vortex lines in disordered type-II superconductors using Langevin molecular dynamics (LMD). We extract the dependence of the mean vortex line velocity and gyration radius as well as the mean-square displacement in the steady state on the driving current, and measure the vortex density and height autocorrelations in the aging regime. We study samples with either randomly distributed point-like or columnar attractive pinning centers, which allows us to distinguish the complex relaxation features of interacting flux lines subject to extended vs. uncorrelated disorder. Additionally, we find that our new LMD findings match earlier Monte Carlo (MC) simulation data well, verifying that these two microscopically quite distinct simulation methods lead to macroscopically very similar results for non-equilibrium vortex matter.
description: 15 pages, 16 figures
Al-dunya aǧmal min al-ǧanna by Ḫālid al-Birrī (2006): A memoir and a journey through national imaginary
Creators: name: Paniconi, Maria Elena
Publisher: name: Kervan. International Journal of African and Asian Studies
Year: 2023

description: Al-dunyā aǧmal min al-ǧanna (“This world is more beautiful than paradise”) by the Egyptian writer Ḫālid al-Birrī is a memoir—firstly serialized in 2001, and then republished as a volume in 2006—recounting the author’s militancy in the fundamentalist group al-ǧamā‘a al-islāmiyya, for around five years. While scholars have referred to this book, generally, as a historical source and as a documentary about the activities and strategies adopted by al-ǧamā‘a al-islāmiyya, I will attempt here an analysis of the text as a memoir, in dialogue with both the Egyptian of Twentieth Century life-writing tradition, and the memoir global tradition. Under this perspective, I will discuss some tropes and discourses developed by the author. In particular, I will analyze how the author develops through this legitimizing genre themes as the quest for identity, the building of a new “self,” the relationship between the self and the Nation, represented through a tight network of cultural and literary references.
description: Kervan. International Journal of African and Asian Studies, V. 27 N. 1 (2023): Kervan 27, 2023
Koineization trends in Spoken Arabic across three Moroccan towns
Creators: name: Falchetta, Jacopo
name: Guerrero, Jairo
Publisher: name: Kervan. International Journal of African and Asian Studies
Year: 2023

description: This paper presents a comparative study of the linguistic data collected during fieldwork in three Arabic-speaking towns in Morocco: Larache, in the north; Temara, on the central Atlantic coast; and Berkane, in the east. The goal of the article is twofold: first of all, it aims at highlighting the new dialectological findings made by analysing the three corpora separately; secondly, it attempts to clarify, by means of a comparative analysis, if there is evidence of a modern koine spreading from the urban areas in Central Morocco to other regions of the country. To these purposes, seven variables pertaining to the levels of phonetics, verbal and nominal morphology are selected for cross-analysis among the three corpora. Previous dialectological data on the same and other Moroccan areas are then taken into account to advance hypotheses on the spread and the ancientness of the identified phenomena of linguistic variation, and their more or less likely connection to the modern koine. The results show that, while there is indeed a certain degree of convergence among the three towns (with Berkane being the least involved in the converging trend), some of the phenomena identified could be explained as accommodation to other varieties having common features with the inter-urban koine, while others could be the result of mutual rather than one-way convergence. More sociolinguistic data are needed to clarify the doubts raised by the analysis.
description: Kervan. International Journal of African and Asian Studies, V. 27 N. 1 (2023): Kervan 27, 2023
NS1‐mediated upregulation of ZDHHC22 acyltransferase in influenza a virus infected cells
Creators: name: Gadalla, Mohamed Rasheed
name: Morrison, Eliot
name: Serebryakova, Marina V.
name: Han, Xueijiao
name: Wolff, Thorsten
name: Freund, Christian
name: Kordyukova, Larisa
name: Veit, Michael
Publisher: name: Freie Universität Berlin
Year: 2021
Subjects: subject: acylation
subject: Hemagglutinin
subject: influenza
subject: mass spectrometry
subject: ZDHHC
subject: 500 Naturwissenschaften und Mathematik::570 Biowissenschaften; Biologie::570 Biowissenschaften; Biologie

description: Influenza A viruses contain two S-acylated proteins, the ion channel M2 and the glycoprotein hemagglutinin (HA). Acylation of the latter is essential for virus replication. Here we analysed the expression of each of the 23 members of the family of ZDHHC acyltransferases in human airway cells, the site of virus replication. RT-PCR revealed that every ZDHHC acyltransferase (except ZDHHC19) is expressed in A549 and Calu cells. Interestingly, expression of one ZDHHC, ZDHHC22, is upregulated in virus-infected cells; this effect is more pronounced after infection with an avian compared to a human virus strain. The viral protein NS1 triggers ZDHHC22 expression in transfected cells, whereas recombinant viruses lacking a functional NS1 gene did not cause ZDHHC22 upregulation. CRISPR/Cas9 technology was then used to knock-out the ZDHHC22 gene in A549 cells. However, acylation of M2 and HA was not reduced, as analysed for intracellular HA and M2 and the stoichiometry of S-acylation of HA incorporated into virus particles did not change according to MALDI-TOF mass spectrometry analysis. Comparative mass spectrometry of palmitoylated proteins in wt and Delta ZDHHC22 cells identified 25 potential substrates of ZDHHC22 which might be involved in virus replication.
Senses and sensuality: Synesthetic imagery in the Siculo-Arabic ghazal poems
Creators: name: Licitra, Ilenia
Publisher: name: Kervan. International Journal of African and Asian Studies
Year: 2023

description: Numerous examples of ghazal poems include metaphorical images describing the altered body of the lover. The yearning for love, passion, disappointment, languish: each stage of the love affair can change the lover appearance. Even more, the alteration can affect also his perception of the beloved body: due to the intensity of the love experience, his sensory perception could end to intertwine, by blending or intermingling his different sense modalities. The verbal transposition of such a visionary state often requires the poet to employ widely rhetorical devices, and particularly synesthesia, in order to enhance the multiple perception of his audience. This paper will focus on the use of this figure in the love poems from the Siculo-Arabic poetic repertoire (10th-12th centuries). In fact, these authors frequently combine the figurative use of words with synesthetic effects, thus involving the reader in a vivid experience: a multilayered text articulating a multisensory perception.
description: Kervan. International Journal of African and Asian Studies, V. 27 N. 1 (2023): Kervan 27, 2023
Big Data And Big Science
Creators: name: Di Meglio, Alberto
Publisher: name: Zenodo
Year: 2014
Subjects: CERN, HEP, CERN openlab

description: Brief introduction to the challenges of big data in scientific research based on the work done by the HEP community at CERN and how the CERN openlab promotes collaboration among research institutes and industrial IT companies. Presented at the FutureGov 2014 conference in Singapore.
Optimal quantum communication using multiparticle partially entangled states
Creators: name: Kumar, Atul
name: Adhikari, Satyabrata
name: Banerjee, Subhashish
name: Roy, Sovik
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Administratively withdrawn.
description: arXiv admin note: According to http://pra.aps.org/pdf/PRA/v87/i5/e059904: "This article should be considered withdrawn from publication. Although the paper shows that maximal slice (MS) states are not locally equivalent to the \chi states, it fails to reference and discuss the closely related material presented in the following article: T. Gao, F. L. Yan, and Y. C. Li, Europhys. Lett. 84, 5001 (2008). The article also makes extensive use of a preprint by Dr. A. Kumar, Dr. A. Kalchenko, and Dr. S. Ghose. Although the article acknowledges S. Ghose, Dr. Ghose and Dr. A. Kaltchenko are not included as authors. Although Drs. Adhikari, Banerjee, and Roy did not know about the preprint, Drs. Kumar, Adhikari, Banerjee, and Roy, together with Physical Review A, apologize to both Drs. Ghose and Kaltchenko, and also to Dr. Gao and his coauthors for these omissions"
Magnon-phonon coupling unmasked: a direct measurement of magnon temperature
Creators: name: Agrawal, Milan
name: Vasyuchka, Vitaliy I.
name: Serga, Alexander A.
name: Karenowska, Alexy D.
name: Melkov, Gennadiy A.
name: Hillebrands, Burkard
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Thermoelectric phenomena in magnetic materials present tantalizing possibilities for manipulating spin-information using heat in future 'spin caloritronic' devices. Key to unraveling their underlying physics is to understand spin-lattice interactions, i.e. the coupling between magnons (the quanta of magnetization excitations) and phonons (the quanta of lattice vibrations). Here, we present the first measurements of the spatial distribution of magnon temperature in a magnetic system subject to a lateral thermal (i.e. phonon temperature) gradient and demonstrate that, contrary to currently accepted theory, the magnon and phonon temperatures do not differ. This result has profound implications. In particular, it re-opens the question of how the spin Seebeck effect-which allows spin currents to be produced from thermal gradients, and is arguably the most intriguing and technologically relevant thermoelectric phenomenon of all-can exist, and which physics underpins it. Specifically, it reveals that if the general framework of the current theory of the effect holds, we must adopt a new concept of spectrally non-uniform magnon temperature.
description: 13 pages, 4 figures
The Kanji game: An online word recognition application for SL Italian learners of Japanese
Creators: name: Mantelli, Alessandro
Publisher: name: Kervan. International Journal of African and Asian Studies
Year: 2023

description: Aim of this study is to investigate the impact of an online word recognition application on the reading skills of Italian Japanese learners. The application is designed to enhance learners' automatic word recognition abilities by incorporating principles of reaction time research and gamification. Japanese being a complex writing system that requires mastery of orthography and phonology, automatic word recognition is a crucial aspect of fluent reading. Reaction time research has demonstrated that the faster a person can recognize a word, the more fluent their reading becomes. Moreover, gamification has been found to be an effective means of motivating learners and improving their performance. The implementation and evaluation of this online word recognition application represents a novel approach to enhancing Italian Japanese learners’ reading proficiency.
description: Kervan. International Journal of African and Asian Studies, V. 27 N. 1 (2023): Kervan 27, 2023
Directed Design of a AuI Complex with a Reduced Mesoionic Carbene Radical Ligand: Insights from 1,2,3‐Triazolylidene Selenium Adducts and Extensive Electrochemical Investigations
Creators: name: Beerhues, Julia
name: Neubrand, Maren
name: Sobottka, Sebastian
name: Neuman, Nicolas I.
name: Aberhan, Hannes
name: Chandra, Shubhadeep
name: Sarkar, Biprajit
Publisher: name: Freie Universität Berlin
Year: 2021
Subjects: subject: carbene–selenium adducts
subject: cyclic voltammetry
subject: mesoionic carbenes
subject: radicals
subject: spectroelectrochemistry
subject: 500 Naturwissenschaften und Mathematik::540 Chemie::540 Chemie und zugeordnete Wissenschaften

description: Carbene-based radicals are important for both fundamental and applied chemical research. Herein, extensive electrochemical investigations of nine different 1,2,3-triazolylidene selenium adducts are reported. It is found that the half-wave potentials of the first reduction of the selones correlate with their calculated LUMO levels and the LUMO levels of the corresponding triazolylidene-based mesoionic carbenes (MICs). Furthermore, unexpected quasi-reversibility of the reduction of two triazoline selones, exhibiting comparable reduction potentials, was discovered. Through UV/Vis/NIR and EPR spectroelectrochemical investigations supported by DFT calculations, the radical anion was unambiguously assigned to be triazoline centered. This electrochemical behavior was transferred to a triazolylidene-type MIC-gold phenyl complex resulting in a MIC-radical coordinated Au-I species. Apart from UV-Vis-NIR and EPR spectroelectrochemical investigations of the reduction, the reduced gold-coordinated MIC radical complex was also formed in situ in the bulk through chemical reduction. This is the first report of a monodentate triazolylidene-based MIC ligand that can be reduced to its anion radical in a metal complex. The results presented here provide design principles for stabilizing radicals based on MICs.
Chinese Medieval chronicles in Song 宋 (960–1279) booklists: A survey
Creators: name: Barenghi, Maddalena
Publisher: name: Kervan. International Journal of African and Asian Studies
Year: 2023

description: By the Song period (960–1279), very few chronicles compiled before the tenth century were preserved in the imperial and private book collections. Early chronicles served as sources for the compilation of dynastic histories and comprehensive accounts; later, as their transmission was no longer valued, they were largely forgotten. As it is widely known, a great deal of these texts was neither transmitted nor fully lost, as fragments survived in Song institutional and literary compendia. Thanks to these compendia, we can glance at their content and form, and make hypotheses concerning their value, readership, and early transmission. Descriptive booklists of the Song -eleventh to the thirteenth century- imperial and private collections are another valuable source of information on the content, cataloging criteria, and later reception of medieval works of a historical nature. Through a reading of the synoptic descriptions of the items listed in the biannian, “accounts arranged chronologically,” sections of book catalogs from the Song period, this article aims to cast some light on the features of these early chronicles.
description: Kervan. International Journal of African and Asian Studies, V. 27 N. 1 (2023): Kervan 27, 2023
A Multi-wavelength Survey of AGN in Massive Clusters: AGN Detection and Cluster AGN Fraction
Creators: name: Klesman, Alison J.
name: Sarajedini, Vicki L.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We aim to study the effect of environment on the presence and fuelling of Active Galactic Nuclei (AGN) in massive galaxy clusters. We explore the use of different AGN detection techniques with the goal of selecting AGN across a broad range of luminosities, AGN/host galaxy flux ratios, and obscuration levels. From a sample of 12 galaxy clusters at redshifts 0.5 < z < 0.9, we identify AGN candidates using optical variability from multi-epoch HST imaging, X-ray point sources in Chandra images, and mid-IR SED power-law fits through the Spitzer IRAC channels. We find 178 optical variables, 74 X-ray point sources, and 64 IR power law sources, resulting in an average of ~25 AGN per cluster. We find no significant difference between the fraction of AGN among galaxies in clusters and the percentage of similarly-detected AGN in field galaxy studies (~2.5%). This result provides evidence that galaxies are still able to fuel accretion onto their supermassive black holes, even in dense environments. We also investigate correlations between the percentage of AGN and cluster physical properties such as mass, X-ray luminosity, size, morphology class and redshift. We find no significant correlations among cluster properties and the percentage of AGN detected.
description: 68 pages, 22 figures, 15 tables
Human ES Cell Culture Conditions Fail to Preserve the Mouse Epiblast State
Creators: name: Devika, A. S.
name: Montebaur, Anna
name: Saravanan, S.
name: Bhushan, Raghu
name: Koch, Frederic
name: Sudheer, Smita
Publisher: name: Freie Universität Berlin
Year: 2021
Subjects: subject: mouse embryonic stem cells
subject: mouse epiblast-like stem cells
subject: human embryonic stem cells
subject: 500 Naturwissenschaften und Mathematik::570 Biowissenschaften; Biologie::570 Biowissenschaften; Biologie

description: Mouse embryonic stem cells (mESCs) and mouse epiblast stem cells (mEpiSCs) are the pluripotent stem cells (PSCs), derived from the inner cell mass (ICM) of preimplantation embryos at embryonic day 3.5 (E3.5) and postimplantation embryos at E5.5-E7.5, respectively. Depending on their environment, PSCs can exist in the so-called naive (ESCs) or primed (EpiSCs) states. Exposure to EpiSC or human ESC (hESC) culture condition can convert mESCs towards an EpiSC-like state. Here, we show that the undifferentiated epiblast state is however not stabilized in a sustained manner when exposing mESCs to hESC or EpiSC culture condition. Rather, prolonged exposure to EpiSC condition promotes a transition to a primitive streak- (PS-) like state via an unbiased epiblast-like intermediate. We show that the Brachyury-positive PS-like state is likely promoted by endogenous WNT signaling, highlighting a possible species difference between mouse epiblast-like stem cells and human Embryonic Stem Cells.
Allegory, trauma and an unfinished revolution in Kitāb al-Naḥḥāt by Aḥmad ʿAbd al-Laṭīf
Creators: name: Waly, Naglaa
Publisher: name: Kervan. International Journal of African and Asian Studies
Year: 2023

description: After the Arab Uprisings and the dramatic consequences of the protests in Egypt, Egyptian novelists produced an abundant number of literary works that deal with the dynamic and complex reality after 2011. Most of these works chronicle complex back stories which reflect national and individuals' crises in the society of the last few decades. This article focuses on Kitāb al-Naḥḥāt (2013); “The Sculptor's Bookʼʼ) by Aḥmad ʿAbd al-Laṭīf and argues that, though it reads and feels like a surreal or fantastic narrative, its events point allegorically at the political and social reality of Egypt in a circuitous and urgent manner. Thus, this article looks at how allegory (Benjamin 1928, Jameson 1986) can help to shed light on the literary treatment of political violence, historical collective trauma and argues that reading ʻAbd al-Laṭīf ‘s novel through a lens of trauma theory enables us to perceive the profound critique of the political Egyptian arena post 2011 as proposed by the writer. The article points out three traumatic tropes: absence, indirection, and repetition. The analysis of literary devices such as fragmentations, alienations, and nightmares will highlight the persistent aching pain and the insidious trauma of the protagonists. Moreover, addressing the main formal and stylistic features of the novel offers a chance to study the changes that may reverberate in narrative forms and symbolic meanings in Egyptian literature post-2011.
description: Kervan. International Journal of African and Asian Studies, V. 27 N. 1 (2023): Kervan 27, 2023
Spurious instabilities in multiangle simulations of collective flavor conversion
Creators: name: Sarikas, Srdjan
name: Seixas, David de Sousa
name: Raffelt, Georg
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The dense neutrino flux streaming from a core-collapse supernova can undergo self-induced flavor conversion caused by neutrino-neutrino refraction. Numerical studies of these nonlinear effects are challenging because representing the neutrino radiation field by discrete energy and angle bins can easily lead to unphysical solutions. In particular, if the number of angle bins N_a is too small, flavor conversion begins too deep and produces completely spurious results. At the same time, N_a=1 (single-angle approximation) can be a good proxy for the N_a -> infinity limit. Based on a linearized stability analysis, we explain some of the puzzling effects of discrete angle distributions.
description: Matches the published version, 8 pages, 5 figures
Assessing Uncertainty and Reliability of Connective Field Estimations From Resting State fMRI Activity at 3T
Creators: name: Invernizzi, Azzurra
name: Gravel, Nicolas
name: Haak, Koen V.
name: Renken, Remco J.
name: Cornelissen, Frans W.
Publisher: name: Freie Universität Berlin
Year: 2021
Subjects: subject: resting-state fMRI
subject: uncertainty
subject: connective field modeling
subject: Bayesian modeling
subject: visual field mapping
subject: visual cortex
subject: 500 Naturwissenschaften und Mathematik::570 Biowissenschaften; Biologie::570 Biowissenschaften; Biologie

description: Connective Field (CF) modeling estimates the local spatial integration between signals in distinct cortical visual field areas. As we have shown previously using 7T data, CF can reveal the visuotopic organization of visual cortical areas even when applied to BOLD activity recorded in the absence of external stimulation. This indicates that CF modeling can be used to evaluate cortical processing in participants in which the visual input may be compromised. Furthermore, by using Bayesian CF modeling it is possible to estimate the co-variability of the parameter estimates and therefore, apply CF modeling to single cases. However, no previous studies evaluated the (Bayesian) CF model using 3T resting-state fMRI data. This is important since 3T scanners are much more abundant and more often used in clinical research compared to 7T scanners. Therefore in this study, we investigate whether it is possible to obtain meaningful CF estimates from 3T resting state (RS) fMRI data. To do so, we applied the standard and Bayesian CF modeling approaches on two RS scans, which were separated by the acquisition of visual field mapping data in 12 healthy participants. Our results show good agreement between RS- and visual field (VF)- based maps using either the standard or Bayesian CF approach. In addition to quantify the uncertainty associated with each estimate in both RS and VF data, we applied our Bayesian CF framework to provide the underlying marginal distribution of the CF parameters. Finally, we show how an additional CF parameter, beta, can be used as a data-driven threshold on the RS data to further improve CF estimates. We conclude that Bayesian CF modeling can characterize local functional connectivity between visual cortical areas from RS data at 3T. Moreover, observations obtained using 3T scanners were qualitatively similar to those reported for 7T. In particular, we expect the ability to assess parameter uncertainty in individual participants will be important for future clinical studies.
Are quantization rules for horizon areas universal?
Creators: name: Faraoni, Valerio
name: Moreno, Andres F. Zambrano
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Doubts have been expressed on the universality of holographic/string-inspired quantization rules for the horizon areas of stationary black holes or the products of their radii, already in simple 4-dimensional general relativity. Realistic black holes are not stationary but time-dependent. Using two examples of 4D general-relativistic spacetimes containing dynamical black holes for at least part of the time, it is shown that the quantization rules (even counting virtual horizons) cannot hold, except possibly at isolated instants of time, and do not seem to be universal.
description: One example and one figure added, two figures improved, bibliography expanded and updated. Matches the version accepted for publication in Phys. Rev. D