cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Vitamin B12 deficiency and use of proton pump inhibitors: a systematic review and meta-analysis
Creators: name: Choudhury, Arup
name: Jena, Anuraag
name: Jearth, Vaneet
name: Dutta, Amit K
name: Makharia, Govind
name: Dutta, Usha
name: Goenka, Mahesh
name: Kochhar, Rakesh
name: Sharma, Vishal
Publisher: name: Taylor & Francis
Year: 2023
Subjects: Medicine
Environmental Sciences not elsewhere classified
Biological Sciences not elsewhere classified
Mental Health

description: Proton pump inhibitors (PPI) may impact the absorption of vitamin B12. We performed a systematic review to ascertain if PPI use increases risk of vitamin B12 deficiency. Electronic databases (PubMed, Embase, Scopus) were searched on first of September 2022. We selected studies that compared the frequency of vitamin B12 deficiency in PPI users and non-users. Pooled Odds Ratio (OR) was calculated for the occurrence of vitamin B12 deficiency in PPI users compared to non-users. The risk of bias was assessed using the Newcastle Ottawa scale. Twenty-five studies were included. The pooled OR of vitamin B12 deficiency among PPI users (2852 participants) was higher than non-users (28070 participants) (OR 1.42, 95% CI: 1.16–1.73; I2 = 54%). Overall risk of PPI use among vitamin B12 deficient individuals was higher than those without deficiency (OR 1.49, 1.20–1.85; I2 = 68%). Most studies found no difference between serum vitamin B12 levels among PPI users compared to non-users. Although the pooled OR of vitamin B12 deficiency was slightly increased in PPI users, but there was significant heterogeneity, and the pooled OR was too low to imply an association clearly. Better-designed prospective studies in long-term users may clarify the issue. This study was not registered on PROSPERO
Classification of solutions of an equation related to a conformal log Sobolev inequality
Creators: name: Frank, Rupert L.
name: König, Tobias
name: Tang, Hanli
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We classify all finite energy solutions of an equation which arises as the Euler--Lagrange equation of a conformally invariant logarithmic Sobolev inequality on the sphere due to Beckner. Our proof uses an extension of the method of moving spheres from $\mathbb R^n$ to $\mathbb S^n$ and a classification result of Li and Zhu. Along the way we prove a small volume maximum principle and a strong maximum principle for the underlying operator which is closely related to the logarithmic Laplacian.
Impact of biologic therapies and small molecules on the risk of major adverse cardiovascular events in patients with inflammatory bowel diseases: systematic review and meta-analysis of randomized controlled trials
Creators: name: Shehab, Mohammad
name: Alrashed, Fatema
name: Alkazemi, Afrah
name: Lakatos, Peter L
name: Bessissow, Talat
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Medicine
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: Mental Health

description: The aim of this study is to estimate the risk of major adverse cardiovascular events (MACEs) in adult patients with inflammatory bowel disease (IBD) treated with biologic therapies and small molecules. Databases were searched up to July 2022 to identify eligible studies that assessed the risk of MACEs in patients (age≥18 years) with IBD treated with biologic therapies and small molecules. Primary outcome was the rate of MACEs observed in patients receiving biologic or small molecules therapies during induction and maintenance phases of RCTs. In total 64 studies were included in the analysis. 22 RCTs involving 12,196 patients with Crohn’s disease (CD) were included and 32 RCTs involving 22,007 patients with ulcerative colitis (UC). In patients with CD, risk of MACE was not higher than placebo during induction or maintenance phases, infliximab (OR 0.63, 95% CI 0.07–6.14) and ustekinumab (OR 0.50, 95% CI 0.03–8.04). In patients with UC, risk of MACE was not higher than placebo, tofacitinib (OR 1.30, 95% CI 0.15–11.21) and upadcitinib (OR 0.50, 95% CI 0.03–7.97) during induction or maintenance. The use of biologic therapies and small molecules among adult patients with IBD had no significant impact on the risk of MACEs during induction and maintenance period of RCTs. Real world data is warranted to assess long-term risks. Biologic and new small molecule therapies have been shown to be effective in treating patients with moderate to severe inflammatory bowel disease (IBD), both Crohn’s disease and ulcerative colitis. The risk of major adverse cardiovascular events (MACE), such as heart attack or heart failure, due to taking these medications in patients with IBD is not well established. The aim of this systematic review and meta-analysis is to estimate the risk of MACE in patients with IBD on biologic or small molecule therapies during induction and maintenance phases of randomized controlled trials.
Gauge Model With Massive Gravitons
Creators: name: Wu, Ning
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Gauge theory of gravity is formulated based on principle of local gauge invariance. Because the model has strict local gravitational gauge symmetry, gauge theory of gravity is a perturbatively renormalizable quantum model. However, in the original model, all gauge gravitons are massless. We want to ask that whether there exists massive gravitons in Nature? In this paper, we will propose a gauge model with massive gravitons. The mass term of gravitational gauge field is introduced into the theory without violating the strict local gravitational gauge symmetry. Massive gravitons can be considered to be possible origin of dark energy and dark matter in the Universe.
description: 8 pages, no figure
The Neoproterozoic-early Paleozoic metamorphic and magmatic evolution of the Eastern Sierras Pampeanas: an overview
Creators: name: Steenken, André
name: López De Luchi, Mónica
name: Martínez Dopico, Carmen
name: Drobe, Malte
name: Wemmer, Klaus
name: Siegesmund, Siegfried
Publisher: name: Springer-Verlag
Year: 2010

description: The Eastern Sierras Pampeanas were structured by three main events: the Ediacaran to early Cambrian (580–510 Ma) Pampean, the late Cambrian–Ordovician (500–440 Ma) Famatinian and the Devonian-Carboniferous (400–350 Ma) Achalian orogenies. Geochronological and Sm–Nd isotopic evidence combined with petrological and structural features allow to speculate for a major rift event (Ediacaran) dividing into two Mesoproterozoic major crustal blocks (source of the Grenvillian age peaks in the metaclastic rocks).This event would be coeval with the development of arc magmatism along the eastern margin of the eastern block. Closure of this eastern margin led to a Cambrian active margin (Sierra Norte arc) along the western margin of the eastern block in which magmatism reworked the same crustal block. Consumption of a ridge segment (input of OIB signature mafic magmas) which controlled granulite-facies metamorphism led to a final collision (Pampean orogeny) with the western Mesoprotrozoic block. Sm–Nd results for the metamorphic basement suggest that the TDM age interval of 1.8–1.7 Ga, which is associated with the less radiogenic values of εNd(540) (−6 to −8), can be considered as the mean average crustal composition for the Eastern Sierras Pampeanas. Increasing metamorphic grade in rocks with similar detrital sources and metamorphic ages like in the Sierras de Córdoba is associated with a younger TDM age and a more positive εNd(540) value. Pampean pre-540 Ma granitoids form two clusters, one with TDM ages between 2.0 and 1.75 Ga and another between 1.6 and 1.5 Ga. Pampean post-540 Ma granitoids exhibit more homogenous TDM ages ranging from 2.0 to 1.75 Ga. Ordovician re-activation of active margin along the western part of the block that collided in the Cambrian led to arc magmatism (Famatinian orogeny) and related ensialic back-arc basin in which high-grade metamorphism is related to mid-crustal felsic plutonism and mafic magmatism with significant contamination of continental crust. TDM values for the Ordovician Famatinian granitoids define a main interval of 1.8–1.6, except for the Ordovician TTG suites of the Sierras de Córdoba, which show younger TDM ages ranging from 1.3 to 1.0 Ga. In Devonian times (Achalian orogeny), a new subduction regime installed west of the Eastern Sierras Pampeanas. Devonian magmatism in the Sierras exhibit process of mixing/assimilation of depleted mantle signature melts and continental crust. Achalian magmatism exhibits more radiogenic εNd(540) values that range between 0.5 and −4 and TDM ages younger than 1.3 Ga. In pre-Devonian times, crustal reworking is dominant, whereas processes during Devonian times involved different geochemical and isotopic signatures that reflect a major input of juvenile magmatism.
Cytenamide acetic acid solvate
Creators: name: Johnston, Andrea
name: Florence, Alastair J.
name: Fabianni, Francesca J. A.
name: Shankland, Kenneth
name: Bedford, Colin T.
Publisher: name: FID GEO
Year: 2008

description: In the crystal structure of the title compound (systematic name: 5H-dibenzo[a,d]cycloheptatriene-5-carboxamide ethanoic acid solvate), C16H13NO C2H4O2, the cytenamide and solvent molecules form a hydrogen-bonded R2 2(8) dimer motif, which is further connected to form a centrosymmetric double ring motif arrangement. The cycloheptene ring adopts a boat conformation and the dihedral angle between the leastsquares planes through the two aromatic rings is 54.7 (2) .
Sensitivity of the chiral phase transition of QCD to the scalar meson sector
Creators: name: Herpay, T.
name: Patkos, A.
name: Szep, Zs.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Gribov's theory of light quark confinement implies the existence of two kinds of scalar bound states. The phase diagram of the three-flavor QCD is mapped out in the (m_pi-m_K)-plane with help of the SU_L(3)xSU_R(3) linear sigma model supplemented with the assumption that the masses of the so-called superbound scalars do not change under the variation of the pion and kaon mass. The phase boundary along the m_pi=m_K line is found in the interval 15 MeV
description: 11 pages, 3 figures, presented at the Gribov-75 Memorial Workshop on Quarks, Hadrons, and Strong Interactions, Budapest, Hungary, 22-24 May 2005
Model for the electrical conductivity in dense plasma mixtures
Creators: name: Starrett, C. E.
name: Shaffer, N. R.
name: Saumon, D.
name: Perriot, R.
name: Nelson, T.
name: Collins, L. A.
name: Ticknor, C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: A new model for the electrical conductivity of dense plasmas with a mixture of ion species, containing no adjustable parameters, is presented. The model takes the temperature, mass density and relative abundances of the species as input. It takes into account partial ionization, ionic structure, and core-valence orthogonality, and uses quantum mechanical calculations of cross sections. Comparison to an existing high fidelity but computationally expensive method reveals good agreement. The new model is computationally efficient and can reach high temperatures. A new mixing rule is also presented that gives reasonably accurate conductivities for high temperature plasma mixtures.
Partitioning of dry matter and minerals in Kenyan common guava under salt stress: implications for selection of adapted accessions for saline soils
Creators: name: Chiveu, Josiah
name: Ubbenjans, Ute
name: Kehlenbeck, Katja
name: Pawelzik, Elke
name: Naumann, Marcel
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: Molecular Biology
subject: Physiology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: Common guava (Psidium guajava L.) is valued for its fruit, which is a source of vitamins, minerals, and natural antioxidants. However, guava production faces salinity challenges globally. Salinity through sodium chloride (NaCl) – 0 mM (control), 10/20 mM (low), 20/40 mM (medium), and 40/80 mM (high) – supplied through a standard Hoagland nutrient solution to 10 genetically diverse guava accessions from Kenya was investigated. Leaf number and dry matter (DM) were significantly reduced at the medium and high salinity levels while root DM remained similar. Root water content increased with rising salinity levels, whereas leaf water content was significantly reduced at the high NaCl level. A decrease in the leaf potassium/sodium (K/Na) and calcium/sodium (Ca/Na) ratios with increasing salinity was observed, possibly due to the high accumulation of Na rather than to the replacement of K and Ca. Leaf phosphorus (P) and sulphur (S) decreased with increasing salinity. Leaf boron (B) and iron (Fe) were significantly reduced only at the high salinity level. Differences among the accessions relative to the accumulation of Na were observed and positively correlated with the DM. Thus, the ability to maintain more DM under salt stress could serve as an indicator for salinity tolerance in Kenyan guava.
Floquet theory for temporal correlations and spectra in time-periodic open quantum systems: Application to squeezed parametric oscillation beyond the rotating-wave approximation
Creators: name: Navarrete-Benlloch, C.
name: Garcés, R.
name: Mohseni, N.
name: de Valcárcel, G. J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Open quantum systems can display periodic dynamics at the classical level either due to external periodic modulations or to self-pulsing phenomena typically following a Hopf bifurcation. In both cases, the quantum fluctuations around classical solutions do not reach a quantum-statistical stationary state, which prevents adopting the simple and reliable methods used for stationary quantum systems. Here we put forward a general and efficient method to compute two-time correlations and corresponding spectral densities of time-periodic open quantum systems within the usual linearized (Gaussian) approximation for their dynamics. Using Floquet theory we show how the quantum Langevin equations for the fluctuations can be efficiently integrated by partitioning the time domain into one-period duration intervals, and relating the properties of each period to the first one. Spectral densities, like squeezing spectra, are computed similarly, now in a two-dimensional temporal domain that is treated as a chessboard with one-period x one-period cells. This technique avoids cumulative numerical errors as well as efficiently saves computational time. As an illustration of the method, we analyze the quantum fluctuations of a damped parametrically-driven oscillator (degenerate parametric oscillator) below threshold and far away from rotating-wave approximation conditions, which is a relevant scenario for modern low-frequency quantum oscillators. Our method reveals that the squeezing properties of such devices are quite robust against the amplitude of the modulation or the low quality of the oscillator, although optimal squeezing can appear for parameters that are far from the ones predicted within the rotating-wave approximation.
description: Comments and constructive criticism are welcome
jancelin/docs-centipedeRTK: v2.2
Creators: name: Ancelin, Julien
name: Heintz, Wilfried
name: Moura, Julien
name: Péneau, Stéphane
Publisher: name: Zenodo
Year: 2022
Subjects: GNSS RTK

description: The CentipedeRTK project is a collaborative and open source project. It aims to create a network of open GNSS bases available to anyone in the coverage area. The network is extended by public institutes, individuals, private actors such as farmers or other public partners. This documentation allows the autonomous creation of bases and rovers for high precision geolocation. It also contains methodology on reference systems, quality analysis, realtime kinematic and post processing techniques.
Local stresses, dyke arrest and surface deformation in volcanic edifices and rift zones
Creators: name: Gudmundsson, Agust
name: Brenner, Sonja L.
Publisher: name: FID GEO
Year: 2004

description: Field studies indicate that nearly all eruptions in volcanic edifices and rift zones are supplied with magma through fractures (dykes) that are opened by magmatic overpressure. While (inferred) dyke injections are frequent during unrest periods, volcanic eruptions are, in comparison, infrequent, suggesting that most dykes become arrested at certain depths in the crust, in agreement with field studies. The frequency of dyke arrest can be partly explained by the numerical models presented here which indicate that volcanic edifices and rift zones consisting of rocks of contrasting mechanical properties, such as soft pyroclastic layers and stiff lava flows, commonly develop local stress fields that encourage dyke arrest. During unrest, surface deformation studies are routinely used to infer the geometries of arrested dykes, and some models (using homogeneous, isotropic half-spaces) infer large grabens to be induced by such dykes. Our results, however, show that the dyke-tip tensile stresses are normally much greater than the induced surface stresses, making it difficult to explain how a dyke can induce surface stresses in excess of the tensile (or shear) strength while the same strength is not exceeded at the (arrested) dyke tip. Also, arrested dyke tips in eroded or active rift zones are normally not associated with dyke-induced grabens or normal faults, and some dykes arrested within a few metres of the surface do not generate faults or grabens. The numerical models show that abrupt changes in Young’s moduli (stiffnesses), layers with relatively high dyke-normal compressive stresses (stress barriers), and weak horizontal contacts may make the dyke-induced surface tensile stresses too small for significant fault or graben formation to occur in rift zones or volcanic edifices. Also, these small surface stresses may have no simple relation to the dyke geometry or the depth to its tip. Thus, for a layered crust with weak contacts, straightforward inversion of surface geodetic data may lead to unreliable geometries of arrested dykes in active rift zones and volcanic edifices.
Evaluation of the representative elementary volume (REV) of a fractured geothermal sandstone reservoir
Creators: name: Müller, Christian
name: Siegesmund, Siegfried
name: Blum, Philipp
Publisher: name: FID GEO
Year: 2010

description: The objective of this study is to evaluate a representative elementary volume (REV) in a fractured geothermal sandstone reservoir in Germany using the discrete fracture network (DFN) model approach. Due to the lack of in situ data from the deep geothermal reservoir, field measurements of outcrop reservoir analogues were conducted to get a quantitative description of the DFN. Field measurements reveal that the geometry of the DFN is largely influenced by the lithological layering (e.g. relationship between joint spacing and bed thickness). Thus, DFN models have to be completed individually for each layer since each bed is distinct compared to its neighbouring beds. Various DFNs were generated using statistical-derived fracture input data. The two-dimensional universal distinct element code UDEC was used for fracture flow simulations. In order to determine the minimum REV, the equivalent average conductivity tensors were obtained with increasing block size. Plots of conductivity tensor coefficients versus block size exhibit only minor variation of the hydraulic properties with increasing block size. Hence, an REV size of 10 m × 10 m could be determined for all studied stochastically derived discrete fracture networks.
UKCDR Safeguarding Phase 2 International Consultation Report
Creators: name: Vaughn, Leona
name: Balch, Alex
name: Smith, Adriana
name: Renton, Linnea
name: Bintu Mansaray
name: Garimella, Surekha
Publisher: name: figshare
Year: 2020
Subjects: subject: 220107 Professional Ethics (incl. police and research ethics)
subject: FOS: Philosophy, ethics and religion

description: This report commissioned by UKCDR and written by a team of researchers led by University of Liverpool (Politics) represents the findings from international consultation on safeguarding in research.
The perception of disordered /[inverted r]/ of children in speech therapy by peers and speech-language pathologists
Creators: name: Perry, Benjamin
Publisher: name: University of British Columbia
Year: 2011

description: Subjective rating is the main method for measuring treatment effect for speech disorders in therapy and research. For complicated speech sounds such as /ɹ/, perceptual judgments by ear are subject to variability. The main goals of the current study were twofold: (1) to compare age peer and speech-language pathologist judgments of /ɹ/ as spoken by children receiving speech therapy for /ɹ/, and (2) to compare those listener judgments in both a single stimulus identification task and a two-stimulus paired comparison task. Sixteen syllables with /r/ were presented by computer over headphones in the two tasks to 24 children (mean age 9 years) and 24 speech-language pathologists (SLPs). Variability, group and task differences were examined. Mean judgments of the tokens by SLPs and children were similar. Intra-rater reliability was better for SLPs than children. In the single stimulus identification task, SLPs also showed better inter-rater reliability than children. In the two-stimulus paired comparison task, SLPs and children had similar inter-rater reliability. Overall, the comparison task resulted in better inter-rater and intra-rater reliability for both groups. Implications for research and clinical evaluation of attempted /ɹ/ are discussed.
Gaussian fluctuations of eigenvalues in the GUE
Creators: name: Gustavsson, Jonas
Publisher: name: arXiv
Year: 2004
Subjects: subject: Probability (math.PR)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: Under certain conditions on k we calculate the limit distribution of the k:th largest eigenvalue, x_k, of the Gaussian Unitary Ensemble (GUE). More specifically, if n is the dimension of a random matrix from the GUE and k is such that both k and n-k tends to infinity as n tends to infinity then x_k is normally distributed in the limit. We also consider the joint limit distribution of x_k_1 < ... < x_k_m where we require that k_1, k_{i+1}-k_i and n-k_m, i=1..m-1, tends to infinity with n. The result is an m-dimensional Normal Distribution.
description: There is now a new version of the article on the Arxiv. Some minor errors have been corrected. One bad error was that the correlations in Theorem 1.4 were wrong 2007-04-04: I upload a new corrected version
Hyperbolic band theory
Creators: name: Maciejko, Joseph
name: Rayan, Steven
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Algebraic Geometry (math.AG)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The notions of Bloch wave, crystal momentum, and energy bands are commonly regarded as unique features of crystalline materials with commutative translation symmetries. Motivated by the recent realization of hyperbolic lattices in circuit quantum electrodynamics, we exploit ideas from algebraic geometry to construct the first hyperbolic generalization of Bloch theory, despite the absence of commutative translation symmetries. For a quantum particle propagating in a hyperbolic lattice potential, we construct a continuous family of eigenstates that acquire Bloch-like phase factors under a discrete but noncommutative group of hyperbolic translations, the Fuchsian group of the lattice. A hyperbolic analog of crystal momentum arises as the set of Aharonov-Bohm phases threading the cycles of a higher-genus Riemann surface associated with this group. This crystal momentum lives in a higher-dimensional Brillouin zone torus, the Jacobian of the Riemann surface, over which a discrete set of continuous energy bands can be computed.
description: v2: published version. 27+19 pages, 5+2 figures, 1 table
The electronic structure around As antisite near (110) surface of GaAs
Creators: name: Iguchi, Yusuke
name: Fujiwara, Takeo
name: Hida, Akira
name: Maeda, Koji
Publisher: name: arXiv
Year: 2004
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The electronic structure around a single As antisite in GaAs is investigated in bulk and near the surface both in the stable and the metastable atomic configurations. The most characteristic electronic structures of As antisite is the existence of the localized p-orbitals extending from the As antisite. The major component of the highest occupied state on As antisite in the stable configuration is s-orbital connecting with neighboring As atoms with nodes whereas that in the metastable configuration is p-orbital connecting without nodes. Localized p-orbitals on the surrounding As atoms around the As antisite exist in every configuration of As antisite. Such features are retained except the case of the As antisite located just in the surface layer in which the midgap level is smeared into the conduction band and no localized states exist near the top of the valence band. Scanning tunneling microscopic images of defects observed in low-temperature grown GaAs, possibly assigned as As antisite, the origin of the metastability, and the peculiarity of the defects in the surface layer are discussed.
description: 11 pages, 9 figures
Lattice preferred orientation as an indicator of a complex deformation history of rocks
Creators: name: Ullemeyer, K.
name: Weber, K.
Publisher: name: FID GEO
Year: 1999

description: The deconvolution of the deformation history of rocks is one of the main goals of texture analysis in geology. The frequent observation that the macroscopic structures are obliquely oriented with respect to the margins of the deformation zone gave rise to the hypotheses that the deformation path might be complex, and that the lattice preferred orientation of the rock-forming minerals should reflect such complicated deformation conditions as well. Hence, texture determinations of polyphase rock samples were carried out and the relationship of the mineral textures to the commonly used sample reference frame foliationlineation, which is assumed to represent the principal axes of the bulk finite strain tensor, was investigated. It was confirmed that particular mineral textures are typical for different stages of the deformation path. Especially the quartz textures exhibit an uncommon but consistent deviation from the sample reference frame, which is consistent with respect to the geographical coordinates, too. Such a characteristic may be used to evaluate the direction of a large-scale horizontal shear component, which is known as the transpressive shear vector in the geological literature.
Binding conditions for atomic N-electron systems in non-relativistic QED
Creators: name: Barbaroux, Jean-Marie
name: Chen, Thomas
name: Vugalter, Semjon
Publisher: name: arXiv
Year: 2003
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 81V10

description: We examine the binding conditions for atoms in non-relativistic QED, and prove that removing one electron from an atom requires a positive energy. As an application, we establish the existence of a ground state for the Helium atom.
description: LaTeX, uses AMS package
Role of The Grand Duchess in the Gondoliers : Composer: Arthur Sullivan
Creators: name: Baird, Linda
Publisher: name: University of British Columbia
Year: 2011

description: The thesis for the Master of Music degree in Opera consists of the performance of a major role in one full opera production in the first or second year. My major role in one full opera production was The Grand Duchess performed in The Gondoliers on December 15t h and 17th.
Reproductive biology of the Sword Snake Tomodon dorsatus (Serpentes: Dipsadidae) in South Brazil: comparisons within the tribe Tachymenini
Creators: name: Loebens, Luiza
name: Almeida-Santos, Selma Maria
name: Cechin, Sonia Zanini
Publisher: name: Brill Online
Year: 2020
Subjects: subject: 60299 Ecology not elsewhere classified
subject: FOS: Biological sciences

description: We described the reproductive cycle, size-fecundity relationships, reproductive effort, and sexual maturity of Tomodon dorsatus in South Brazil. We examined 87 individuals (25 males and 62 females) from herpetological collections. The description of the reproductive cycle was based on the morpho-anatomical and histological changes in male testes, ductus deferens, and kidney and in female ovary and oviduct. The age at the onset of sexual maturity was estimated by skeletochronology of the caudal vertebra. The reproduction is seasonal semi-synchronous with most of the individuals showing a reproductive peak in the spring. Males and females have developed sperm storage strategies, increasing the reproductive success. Males store sperm in the ductus deferens during the autumn and winter, while females storage takes place in the utero-vaginal junction furrows during the autumn and early winter. Larger females produce a higher number of larger follicles and eggs. Females invest more in growth before reaching sexual maturity than males. Females reach sexual maturity earlier (4 years old) than males (5 years old) and have larger bodies but lower longevity. Reproductive strategies of Tachymenini specie are highly conserved.
Discretuum versus Continuum Dark Energy
Creators: name: Dimopoulos, Savas
name: Thomas, Scott
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The dark energy equation of state for theories with either a discretuum or continuum distribution of vacua is investigated. In the discretuum case the equation of state is constant $w=p/ρ=-1$. The continuum case may be realized by an action with large wave function factor $Z$ for the dark energy modulus and generic potential. This form of the action is quantum mechanically stable and does not lead to measurable long range forces or violations of the equivalence principle. In addition, it has a special property which may be referred to as super-technical naturalness which results in a one-parameter family of predictions for the cosmological evolution of the dark energy equation of state as a function of redshift $w=w(z)$. The discretuum and continuum predictions will be tested by future high precision measurements of the expansion history of the universe. Application of large $Z$-moduli to a predictive theory of $Z$-inflation is also considered.
description: LaTex, 16 pages, 3 figures, references added
Nivolumab-Related Dry Mouth and Dry Eye: Cross-Sectional Study
Creators: name: Yildirim, Ozgen Ahmet
name: Poyraz, Kerem
name: Erdur, Erkan
name: Can, Canan
name: Gundogan, Cihan
name: Guzel, Yunus
name: Etem, Hülya
name: Kömek, Halil
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Medicine
subject: Cell Biology
subject: Physiology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Immunology
subject: FOS: Clinical medicine

description: To evaluate ICIs related dry eye and dry mouth in nivolumab therapy, 24 patients receiving nivolumab (group 1), 30 patients in remission without treatment for 6 months (group 2), 30 healthy participants (group 3) were cross-sectionally examined. Schirmer’s 1, 2, TSH blood tests, serological analysis, salivary flow scintigraphy and minor-salivary gland biopsy were performed. Schirmer’s tests were performed with anesthetic (1) and without anesthetic (2). Schirmer’s scores were lower in group 1 with more frequent reduced tear production (p 1) and CD4 T lymphocyte precipitation was observed in 6 patients. Nivolumab therapy may be associated with ICIs related immune sicca.
WloopPHI: A tool for ab initio characterization of Weyl semimetals
Creators: name: Saini, Himanshu
name: Laurien, Magdalena
name: Blaha, Peter
name: Rubel, Oleg
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: WloopPHI is a Python code that expands the features of WIEN2k, a full-potential all-electron density functional theory package, by the characterization of Weyl semimetals. It enables the calculation of the chirality (or "monopole charge") associated with Weyl nodes and nodal lines. The theoretical methodology for the calculation of the chirality is based on an extended Wilson loop method and a Berry phase approach. We validate the code using TaAs, which is a well-characterized Weyl semimetal, both theoretically and experimentally. Afterwards, we applied the method to the characterization of YRh$_6$Ge$_4$ and found two sets of Weyl points (ca. 0.2 eV below the Fermi energy) together with a topological nodal line (protected by mirror symmetry) crossing the Fermi energy and mapped their chiralities.
description: 31 pages, 9 figures
Fluid/rock interaction and mass transfer in continental subduction zones: constraints from trace elements and isotopes (Li, B, O, Sr, Nd, Pb) in UHP rocks from the Chinese Continental Scientific Drilling Program, Sulu, East China
Creators: name: Xiao, Yilin
name: Hoefs, Jochen
name: Hou, Zhenhui
name: Simon, Klaus
name: Zhang, Zeming
Publisher: name: Springer-Verlag
Year: 2011

description: In order to better understand the role of fluids during subduction and subsequent exhumation, we have investigated whole-rock and mineral chemistry (major and trace elements) and Li, B as well as O, Sr, Nd, Pb isotopes on selected continuous drill-core profiles through contrasting lithological boundaries from the Chinese Continental Scientific Drilling Program (CCSD) in Sulu, China. Four carefully selected sample sets have been chosen to investigate geochemical changes as a result of fluid mobilization during dehydration, peak metamorphism, and exhumation of deeply subducted continental crust. Our data reveal that while O and Sr-Nd-Pb isotopic compositions remain more or less unchanged, significant Li and/or B isotope fractionations occur between different lithologies that are in close contact during various metamorphic stages. Samples that are supposed to represent prograde dehydration as indicated by veins formed at high pressures (HP) are characterized by element patterns of highly fluid-mobile elements in the veins that are complementary to those of the host eclogite. A second sample set represents a UHP metamorphic crustal eclogite that is separated from a garnet peridotite by a thin transitional interface. Garnet peridotite and eclogite are characterized by a >10% difference in MgO, which, together with the presence of abundant hydroxyl-bearing minerals and compositionally different clinopyroxene grains demonstrate that both rocks have been derived from different sources that have been tectonically juxtaposed during subduction, and that hydrous silicate-rich fluids have been added from the subducting slab to the mantle. Two additional sample sets, comprising retrograde amphibolite and relatively fresh eclogite, demonstrate that besides external fluids, internal fluids can be responsible for the formation of amphibolite. Li and B concentrations and isotopic compositions point to losses and isotopic fractionation during progressive dehydration. On the other hand, fluids with isotopically heavier Li and B are added during retrogression. On a small scale, mantle-derived rocks may be significantly metasomatized by fluids derived from the subducted slab. Our study indicates that during high-grade metamorphism, Li and B may show different patterns of enrichment and of isotopic fractionation.
Open IT tools for inquiry-based physics education
Creators: name: Šechný, Martin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Physics Education (physics.ed-ph)
subject: Computers and Society (cs.CY)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: In case of inquiry-based education, the priority is the pupil's activity, developing his/her practical and research skills. We can use the knowledge and skills obtained by the pupil from other subjects. Applied informatics into physics seems to be a suitable application of digital literacy. Open IT tools are the ones of the available IT tools that bring several benefits to promote freedom of inquiry. An overview of open IT tools for physics education includes microprocessor kits with a variety of analog and digital electronic components, a large number of application software, simulation software, programming languages, libraries and development environments, web tools, virtual laboratories, data catalogs, hypertext documents and other auxiliary resources. Such open IT tools together with suitable open educational resources will be applicable in physics, mathematics, informatics and other subjects.
description: 3 pages, 5 figures, shorter version of this paper has been accepted at the 24th conference of Slovak physicists (2019)
Anomalous Thermalization in Quantum Collective Models
Creators: name: Relaño, Armando
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We show that apparently thermalized states still store relevant amounts of information about their past, information that can be tracked by experiments involving nonequilibrium processes. We provide a condition for the microcanonical quantum Crookś theorem, and we test it by means of numerical experiments. In the Lipkin-Meshkov-Glick model, two different procedures leading to the same equilibrium states give rise to different statistics of work in nonequilibrium processes. In the Dicke model, two different trajectories for the same nonequilibrium protocol produce different statistics of work. Microcanonical averages provide the correct results for the expectation values of physical observables in all the cases; the microcanonical quantum Crookś theorem fails in some of them. We conclude that testing quantum fluctuation theorems is mandatory to verify if a system is properly thermalized.
Effect of pumice and sand on the sustainability of granular iron beds for the aqueous removal of CuII, NiII, and ZnII
Creators: name: Bilardi, Stefania
name: Calabrò, Paolo S.
name: Caré, Sabine
name: Moraci, Nicola
name: Noubactep, Chicgoua
Publisher: name: FID GEO
Year: 2013

description: Current knowledge of the basic principles underlying the design of Fe0 beds is weak. The volumetric expansive nature of iron corrosion was identified as the major factor determining the sustainability of Fe0 beds. This work attempts to systematically verify developed concepts. Pumice and sand were admixed to 200 g of Fe0 in column studies (50:50 volumetric proportion). Reference systems containing 100 % of each material have been also investigated. The mean grain size of the used materials (in mm) were 0.28 (sand), 0.30 (pumice) and 0.50 (Fe0). The five studied systems were characterized (i) by the time dependent evolution of their hydraulic conductivity (permeability) and (ii) for their efficiency for aqueous removal of CuII, NiII, and ZnII (about 0.30 M of each). Results showed unequivocally that (i) quantitative contaminant removal was coupled to the presence of Fe0, (ii) additive admixture lengthened the service life of Fe0 beds, and (iii) pumice was the best admixing agent for sustaining permeability while the Fe0/sand column was the most efficient for contaminant removal. The evolution of the permeability was well-fitted by the approach that the inflowing solution contained dissolved O2. The achieved results are regarded as starting point for a systematic research to optimise/support Fe0 filter design.
JAGUAR: A New CFD Code Dedicated to Massively Parallel High-Order LES Computations on Complex Geometry
Creators: name: Cassagne, Adrien
name: Jean-François Boussuge
name: Villedieu, Nadège
name: Puigt, Guillaume
name: D'Ast, Isabelle
name: Genot, Aurélien
Publisher: name: figshare
Year: 2020
Subjects: Computational Physics

description: LES of industrial flows is associated with geometrical complexity and requires high order schemes to minimize dissipation and dispersion. To tackle these two issues it is necessary to use unstructured grids and High Performance
Computing algorithms. In this context, CERFACS initiated two years ago the development of a new CFD code called JAGUAR based on a mathematical framework leading to high-level capability for LES. In this paper, many topics for HPC are introduced and solved in order to obtain the best code performance.
Measuring the Neutron's Mean Square Charge Radius Using Neutron Interferometry
Creators: name: Wietfeldt, F. E.
name: Huber, M.
name: Black, T. C.
name: Kaiser, H.
name: Arif, M.
name: Jacobson, D. L.
name: Werner, S. A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The neutron is electrically neutral, but its substructure consists of charged quarks so it may have an internal charge distribution. In fact it is known to have a negative mean square charge radius (MSCR), the second moment of the radial charge density. In other words the neutron has a positive core and negative skin. In the first Born approximation the neutron MSCR can be simply related to the neutron-electron scattering length b_ne. In the past this important quantity has been extracted from the energy dependence of the total transmission cross-section of neutrons on high-Z targets, a very difficult and complicated process. A few years ago S.A. Werner proposed a novel approach to measuring b_ne from the neutron's dynamical phase shift in a perfect crystal close to the Bragg condition. We are conducting an experiment based on this method at the NIST neutron interferometer which may lead to a five-fold improvement in precision of b_ne and hence the neutron MSCR.
description: 5 pages, 2 figures
Projected NA62 sensitivity to heavy neutral lepton production in $K^+ \to π^0 e^+ N$ decays
Creators: name: Tastet, Jean-Loup
name: Goudzovski, Evgueni
name: Timiryasov, Inar
name: Ruchayskiy, Oleg
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Heavy neutral leptons (HNLs) appear in many extensions of the Standard Model of particle physics. In this study, we investigate to which extent the NA62 experiment at CERN could improve the existing bounds on the HNL mixing angle $|U_e|^2$ by performing a missing mass search in $K^+ \to π^0 e^+ N$ decays in flight. We show that the limit $|U_e|^2 \simeq 2\times 10^{-6}$ can be reached with the currently available data in the mass range 125 -- 144 MeV, which is currently not well covered by production searches. Future data, together with a dedicated trigger and/or improvements in rejection of out-of-acceptance photons, can improve this limit by another order of magnitude.
description: 7 pages, 4 figures, matches published version
The Impact of international remittance on poverty, household consumption and investment in urban Ethiopia: evidence from cross-sectonal measures.
Creators: name: Kokeb G. Giorgis
name: Meseret Molla
name: Kokeb G. Giorgis
name: Meseret Molla
Publisher: name: Unknown
Year: 2015
Subjects: subject: Financial Economics
subject: Food Consumption/Nutrition/Food Safety
subject: Food Security and Poverty
subject: International Relations/Trade
subject: International remittance
subject: poverty
subject: household consumption
subject: Investment

description: International remittance is an essential source of foreign exchange for Ethiopia, perhaps larger than the export earning of the country in its foreign exchange generation capacity. In the year 2013; total international remittance in Ethiopia reached 557 million USD from 387 million USD in 2010 according to World Bank Report. To assess the impact of international remittances on poverty, household consumption and investment in urban Ethiopia, this study used primary household survey data collected from four major urban areas of the country namely Addis Ababa, Gonder, Hawassa and Mekelle. The study applies both descriptive and empirical analysis; using Heckman two stage selection model the study finds that international remittances substantially reduce the level, depth and severity of poverty. For the sub sample of households which receive remittances poverty head count index, poverty gap and squared poverty gap declined by 64 percent, 67 percent and 70 percent respectively. Similarly the study found that all remittance receiving households spend part of their remittance income mainly on food and non durable goods. Yet, a good number of households are also used part of it for investment such as health, education and housing. Nevertheless; relatively insignificant number of households save part of remittance income and none of them used it to invest in entrepreneurial or other income generating activities.
Real-World Incidence and Management of Immune-Related Adverse Events from Immune Checkpoint Inhibitors: Retrospective Claims-Based Analysis
Creators: name: Brown, Victoria T.
name: Antol, Dana Drzayich
name: Racsa, Patrick N.
name: Ward, Melea A.
name: Naidoo, Jarushka
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Medicine
subject: Pharmacology
subject: Ecology
subject: FOS: Biological sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: We assessed real-world spectrum and patterns of irAEs for patients treated with anti-PD(L)1 ICIs. irAEs were defined using medical and pharmacy claims for patients enrolled in a Medicare Advantage Prescription Drug plan who initiated treatment with anti-PD(L)-1 and received ≥ 1 dose of therapy between 1 September 2014 and 28 February 2018. Treatment was discontinued for 46.6% of patients, and withheld and subsequently restarted for 10.3%. While toxicity profiles did not differ by age, RiskRx-V co-morbidity index was higher in patients with irAEs. These data underscore the needs for tailored irAE diagnostic and management pathways.
Pulsating sdB Stars: A New Approach to Probing their Interiors
Creators: name: Kawaler, Steven D.
name: Hostler, Shelbi R.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Horizontal branch stars should show significant differential rotation with depth. Models that assume systematic angular momentum exchange in the convective envelope and local conservation of angular momentum in the core produce HB models that preserve a rapidly rotating core. A direct probe of core rotation is available. The nonradial pulsations of the EC14026 stars frequently show rich pulsation spectra. Thus their pulsations probe the internal rotation of these stars, and should show the effects of rapid rotation in their cores. Using models of sdB stars that include angular momentum evolution, we explore this possibility and show that some of the sdB pulsators may indeed have rapidly rotating cores.
description: 8 pages, 3 figures; paper presented at Keele Workshop on Extreme Horizontal Branch Stars and Related Objects, June 2003 (ed. Pierre Maxsted)