cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Quench Dynamics of Entanglement in an Opened Anisotropic Spin-1/2 Heisenberg Chain
Creators: name: Ren, Jie
name: Zhu, Shiqun
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The quantum entanglement dynamics of a one-dimensional spin-1/2 anisotropic XXZ model is studied using the method of the adaptive time-dependent density-matrix renormalization-group when two cases of quenches are performed in the system. An anisotropic interaction quench and the maximum number of domain walls of staggered magnetization quench are considered. The dynamics of pairwise entanglement between the nearest two qubits in the spin chain is investigated. The entanglement of the two-spin qubits can be created and oscillates in both cases of the quench. The anisotropic interaction has a strong influence on the oscillation frequency of entanglement.
description: 13 pages, 4 figures
Mineralogical and petrogenetic features of the peridotites and associated podiform chromitites from Abgarm ultramafic complex (south-eastern Iran)
Creators: name: Alipour, Raziyeh
name: Moeinzadeh, Hesam
name: Perinelli, Cristina
name: Bosi, Ferdinando
name: Ahmadipour, Hamid
Publisher: name: Periodico di Mineralogia
Year: 2021

description: Abgarm ultramafic complex is a part of the Esfandagheh-Hajiabad coloured melange belt located in the south east of Iranian segment of Alpine-Himalayan orogenic belt. The complex has faulted contacts with flysch type sediments of upper cretaceous ophiolite melange complex. Harzburgite is the dominant lithotype, dunites and lherzolites also occur in lesser extents. Some dunites contain massive chromitite pods or bands. The chemistry of minerals of harzburgite samples reflects the depleted nature of these rocks and indicates that the Abgarm mantle experienced a melt extraction less than 30%. Geothermo-barometric estimates indicate that the harzburgitic Abgarm mantle have been initially equilibrated at temperatures between 809-923°C and then at 613-725 °C, in a range of pressures of 1.1 and 2.3 GPa. Moreover, fO2 calculation gives a redox state that is in a range of 0.7 log bar units above the fayalite–magnetite–quartz buffer FMQ (log = 0.1 ÷ 0.7 log-bar units). Tectonomagmatic discrimination diagrams based on mineral compositions indicate that Abgarm harzburgite evolved as abyssal peridotite while Cr-spinel of chromitites probably fractionated from boninitic melts formed by the partial melting of the mantle wedge above the subduction zone.
description: Periodico di Mineralogia, Vol. 90 No. 3 (2021)
Conformal Invariance, Dynamical Dark Energy and the CMB
Creators: name: Mottola, Emil
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: General Relativity receives quantum corrections relevant at cosmological distance scales from the conformal scalar degrees of freedom required by the trace anomaly of the quantum stress tensor in curved space. In the theory including the trace anomaly terms, the cosmological "constant" becomes dynamical and hence potentially dependent upon both space and time. The fluctuations of these anomaly scalars may also influence the spectrum and statistics of the Cosmic Microwave Background. Under the hypothesis that scale invariance should be promoted to full conformal invariance, an hypothesis supported by the exact equivalence of the conformal group of three dimensions with the de Sitter group SO(4,1), the form of the CMB bispectrum can be fixed, and the trispectrum constrained. The non-Gaussianities predicted by conformal invariance differ from those suggested by simple models of inflation.
description: 8 pages, Latex2e, uses moriond.sty file. Talk given at "2010 Cosmology," March 13-20, 2010, La Thuile, Aosta, Italy
Geochemistry signature, Sm-Nd and U-Pb isotopic data and age of dyke swarms in southwestern Jiroft, southern Iran
Creators: name: Jahangiri, Hojatollah
name: Saadat, Saeed
name: Mazaheri, Ahmad
name: Shahri, Mohammad Reza Heidarian
name: Le Roux, Petrus
name: Foudazi, Mohammad
name: Omrani, Seyed Jafar
Publisher: name: Periodico di Mineralogia
Year: 2021

description: Numerous NW-SE trending dykes outcrop in south west of Jiroft, Southern Iran. These dykes are mainly composed of diorite, quartz diorite, gabbro-diorite, and gabbro. Plagioclases in the dyke swarm have composition ranging from An99.5Ab0.5 in cores, to An17Ab78Or5 in rims, and compositional variation with En42-49Wo39-40Fs11-18 in clinopyroxene plots across the augite field boundary. These rocks show strongly met-aluminous signatures and tholeiitic affinity. Studied rocks display LaN/LuN=0.68-2.19 and EuN/Eu*=1.63-1.92 with nearly flat heavy rare earth element (HREE). The U-Pb age dating of zircons from a dyke yielded 36.07±0.07 Ma indicating Eocene crystallization age, to an age of 783.85±1.98 Ma, indicating this dyke has zircon xenocrysts inherited. The initial 87Sr/86Sr and 143Nd/144Nd isotopic composition of studied swarm dykes are 0.705287±0.000009 and 0.512833±0.00001 respectively. Geochemical data show transitional geochemical characteristics between normal mid-ocean ridge basalt and island arc tholeiites. Geochemical and isotopic data indicate they formed by around 15% melting of a spinel-mantle source metasomatized by fluids derived from subducted oceanic slab.
description: Periodico di Mineralogia, Vol. 90 No. 3 (2021)
Evolution des industries lithiques du Centre-Est de la France du VIe au IIIe millénaire av. J.-C.
Creators: name: Perrin, Thomas
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2023

description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 81 Nr. 2 (2003)
Asymptotic dynamics of closed-boundary vehicular traffic
Creators: name: Lee, Chi-Lun
name: huang, Chia-Ling
Publisher: name: arXiv
Year: 2010
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: We study the dynamics of vehicular traffic in a loop using a car-following model with the consideration of volume exclusions. In particular, we solve the steady state for the single-cluster case and derive fundamental diagrams, exhibiting two branches representative of entering and leaving the jam, respectively. By simulations we also observe that the speed average over all vehicles reaches the same constant at the steady states, regardless of the final clustering state. The autocorrelation functions for the overall speed average and single vehicle speed are investigated, each revealing a robust time scale. The effects of noises in vehicular acceleration are discussed.
description: 7 pages, 8 figures
Crystal chemistry of natural occurring asbestos tremolite from calabrian ophiolites
Creators: name: Pacella, Alessandro
name: Ballirano, Paolo
name: Skogby, Henrik
name: Angelosanto, Federica
name: Olori, Angelo
name: Cannizzaro, Annapaola
name: Bruno, Maria Rosaria
name: Sinopoli, Francesco
name: Campopiano, Antonella
Publisher: name: Periodico di Mineralogia
Year: 2021

description: The present work reports a detailed chemical and structural characterization of a fibrous tremolite sample from an abandoned serpentine quarry located in Mount Reventino (Calabria, Italy), by using SEM-EDS analysis, Mössbauer spectroscopy, and X-ray powder diffraction. Cell parameters, fractional coordinates and site scattering were refined using the Rietveld method. Results showed that the sample contains small amount of Fe, being the % ferro-actinolite content of ca. 3%. In particular, Fe2+ is preferentially allocated at M(1)+M(3) octahedral sites, and Fe3+ only occurs at M(2). Combining chemical, spectroscopic and structural data the following empirical formula has been derived: A(Na0.124)Σ0.124M(4)(Ca1.922Na0.003Fe2+0.026Mg0.049)Σ2.000[M(1)(Mg1.960Fe2+0.040)Σ2.000M(2)(Mg1.963Fe3+0.024Fe2+0.013)Σ2.000 M(3)(Mg0.931Fe2+0.069)Σ1.000] [T(1)(Si3.946Al0.024)Σ3.970 T(2)(Si4.000)] O22 O(3)(OH2.000)Σ2.000. Considering that both the presence of Fe and its coordination environment within the mineral structure are primary factors for pathological effects, the identification of Fe bearing asbestos tremolite in the investigated area may represent a potential hazard for human health.
description: Periodico di Mineralogia, Vol. 90 No. 3 (2021)
Morphological evolution of galaxies from ultradeep HST WFC3 imaging: the Hubble sequence at z~2
Creators: name: Szomoru, Daniel
name: Franx, Marijn
name: Bouwens, Rychard J.
name: van Dokkum, Pieter G.
name: Labbe, Ivo
name: Illingworth, Garth D.
name: Trenti, Michele
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We use ultradeep HST WFC3/IR imaging of the HUDF to investigate the rest-frame optical morphologies of a mass-selected sample of galaxies at z~2. We find a large variety of galaxy morphologies, ranging from large, blue, disk-like galaxies to compact, red, early-type galaxies. We derive rest-frame u-g color profiles for these galaxies and show that most z~2 galaxies in our sample have negative color gradients such that their cores are red. Although these color gradients may partly be caused by radial variations in dust content, they point to the existence of older stellar populations in the centers of z~2 galaxies. This result is consistent with an "inside-out" scenario of galaxy growth. We find that the median color gradient is fairly constant with redshift: [Delta(u-g_{rest})/Delta(log r)]_{median} = -0.46, -0.44 and -0.49 for z~2, z~1 and z=0, respectively. Using structural parameters derived from surface brightness profiles we confirm that at z~2 galaxy morphology correlates well with specific star formation rate. At the same mass, star forming galaxies have larger effective radii, bluer rest-frame u-g colors and lower Sersic indices than quiescent galaxies. These correlations are very similar to those at lower redshift, suggesting that the relations that give rise to the Hubble sequence at z=0 are already in place for massive galaxies at this early epoch.
description: Accepted for publication in ApJ Letters, 7 pages, 4 figures
Understanding the Quantum Computational Speed-up via De-quantisation
Creators: name: Abbott, Alastair A.
name: Calude, Cristian S.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: Computational Complexity (cs.CC)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: F.1.2

description: While it seems possible that quantum computers may allow for algorithms offering a computational speed-up over classical algorithms for some problems, the issue is poorly understood. We explore this computational speed-up by investigating the ability to de-quantise quantum algorithms into classical simulations of the algorithms which are as efficient in both time and space as the original quantum algorithms. The process of de-quantisation helps formulate conditions to determine if a quantum algorithm provides a real speed-up over classical algorithms. These conditions can be used to develop new quantum algorithms more effectively (by avoiding features that could allow the algorithm to be efficiently classically simulated), as well as providing the potential to create new classical algorithms (by using features which have proved valuable for quantum algorithms). Results on many different methods of de-quantisations are presented, as well as a general formal definition of de-quantisation. De-quantisations employing higher-dimensional classical bits, as well as those using matrix-simulations, put emphasis on entanglement in quantum algorithms; a key result is that any algorithm in which the entanglement is bounded is de-quantisable. These methods are contrasted with the stabiliser formalism de-quantisations due to the Gottesman-Knill Theorem, as well as those which take advantage of the topology of the circuit for a quantum algorithm. The benefits of the different methods are contrasted, and the importance of a range of techniques is emphasised. We further discuss some features of quantum algorithms which current de-quantisation methods do not cover.
title: Simulation von Integrierten Aktoren für Elektrostatische Self-Assembly
title: Simulation of Integrated Actuators for Electrostatic Self-Assembly
titleType: AlternativeTitle
Creators: name: Stucki, Martin
name: Raatz, Annika
Publisher: name: Darmstadt : VDI
Year: 2022
Subjects: subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Die Montage ist ein Kostentreiber in der Produktion, insbesondere wenn die Anforderungen an die Präzision stei-gen. Ein Ansatz für die kostengünstige Feinpositionierung von planaren Bauteilen ist die elektrostatische Self-Assembly, bei dem Aktoren in die Bauteile integriert werden. In diesem Artikel werden die Grundlagen des Designs solcher Systeme thematisiert, da diese Ausschlaggebend für die resultierenden Positionierkräfte sind. Zum Feststellen der Zusammenhänge werden Simulationen für einzelne Elektrodenpaare durchgeführt, wobei die Geometrien Kreis, Quadrat, Rechteck, Sechseck und Dreieck miteinander verglichen werden. Die Auswertung erfolgt mit der simulierten Maximalkraft und der Kraftverteilung innerhalb der xy-Ebene. In Hinblick auf die Prozessgrößen Präzision und maximalen Wirkbereich werden die Ergebnisse interpretiert und Rückschlüsse auf die sinnvolle Gestaltung von Self-Assembly Systemen gezogen. Abschließend erfolgt ein Ausblick auf weitere Forschungen zu elektrostatischen Self-Assembly Systemen.
description: Assembly is a high-cost process in production, especially when the precision requirements are high. One approach for cost-effective fine positioning of planar components is electrostatic self-assembly. Therefore, actuators are integrated into the components. This paper deals with the fundamental design principles of such systems, because they are significantly influencing the alignment force. This paper presents simulations of individual electrode pairs, comparing the geometries circle, square, rectangle, hexagon and triangle. The evaluation shows the results of the simulated maximum force and the force distribution within the xy-plane. Aiming for high precision and a wide range of force distribution, conclusions are made about the appropriate design of self-assembly systems. In conclusion, there is an outlook on additional research into electrostatic self-assembly systems.
A splitting theorem for higher order parallel immersions
Creators: name: Kath, Ines
name: Nagy, Paul-Andi
Publisher: name: arXiv
Year: 2011
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We consider isometric immersions into space forms having the second fundamental form parallel at order k. We show that this class of immersions consists of local products, in a suitably defined sense, of parallel immersions and normally flat immersions of flat spaces.
description: 10 pages
Commercial brucite, a worldwide used raw material deemed safe, can be contaminated by asbestos
Creators: name: Malferrari, Daniele
name: Di Giuseppe, Dario
name: Scognamiglio, Valentina
name: Gualtieri, Alessandro
Publisher: name: Periodico di Mineralogia
Year: 2021

description: Brucite is a raw material used in several applications and world-wide traded. The main active deposits are located in North America, North Europe and China and the extracted material is worked and delivered all over the world without any particular precaution as it is considered a safe inert product. But is it really true? Applying a consolidated protocol of analysis for the detection and characterization of fibers, we found asbestos in a sample of commercial brucite. The analyzed material is primarily composed of plate-like crystals of brucite; nevertheless, chemical and mineralogical analyses revealed the presence of serpentine, while the occurrence of respirable regulated chrysotile (serpentine asbestos) fibers was confirmed by morphometric observations through electron microscopy. The individual fibers making up the chrysotile bundles have length >5 µm, width <3 µm, length/width ratio >3, and their concentration in the investigated product is 169 mg/kg (0.02 wt%). Although paragenesis of brucite with chrysotile has been known for a long time, never before was documented a commercial brucite, distributed all over the world, contaminated by asbestos. In the light of these results we think that certification of the absence of asbestos should be imposed to the brucite mining companies and distributors; otherwise, users should always include a careful inspection, at least by electron microscopy, among the incoming standard tests to rule out the occurrence of asbestos.
description: Periodico di Mineralogia, Vol. 90 No. 3 (2021)
The Dark Matter Haloes and Host Galaxies of MgII Absorbers at z~1
Creators: name: Lundgren, Britt
name: Wake, David
name: Padmanabhan, Nikhil
name: Coil, Alison
name: York, Donald
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Strong foreground absorption features from singly-ionized Magnesium (Mg II) are commonly observed in the spectra of quasars and are presumed to probe a wide range of galactic environments. To date, measurements of the average dark matter halo masses of intervening Mg II absorbers by way of large-scale cross-correlations with luminous galaxies have been limited to z<0.7. In this work we cross-correlate 21 strong (Wλ2796>0.6 °A) Mg II absorption systems detected in quasar spectra from the Sloan Digital Sky Survey Data Release 7 with ~32,000 spectroscopically confirmed galaxies at 0.70.6 Ågas covering fraction to be f =0.5 within 60 h-1kpc around the DEEP2 galaxies, and we find an absence of coincident strong Mg II absorption beyond a projected separation of ~40 h-1kpc. Although the star-forming z>1 DEEP2 galaxies are known to exhibit ubiquitous blueshifted Mg II absorption, we find no direct evidence in our small sample linking Wλ2796>0.6 Åabsorbers to galaxies with ongoing star formation.
description: 12 pages, 5 figures, Accepted to MNRAS
Landauer's principle in the quantum domain
Creators: name: Anders, Janet
name: Shabbir, Saroosh
name: Hilt, Stefanie
name: Lutz, Eric
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: Information Theory (cs.IT)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Recent papers discussing thermodynamic processes in strongly coupled quantum systems claim a violation of Landauer's principle and imply a violation of the second law of thermodynamics. If true, this would have powerful consequences. Perpetuum mobiles could be build as long as the operating temperature is brought close to zero. It would also have serious consequences on thermodynamic derivations of information theoretic results, such as the Holevo bound. Here we argue why these claims are erroneous. Correlations occurring in the strongly coupled, quantum domain require a rethink of how entropy, heat and work are calculated. It is shown that a consistent treatment solves the paradox.
Enhanced ULF radiation observed by DEMETER two months around the strong 2010 Haiti earthquake
Creators: name: Athanasiou, M.
name: Anagnostopoulos, G.
name: Iliopoulos, A.
name: Pavlos, G.
name: David, K.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Geophysics (physics.geo-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: In this paper we study the energy of ULF electromagnetic waves that have been recorded by the satellite DEMETER, during its passing over Haiti before and after a destructive earthquake. This earthquake occurred on 12/1/2010, at geographic Latitude 18.46o and Longitude 287.47o, with Magnitude 7.0 R. Specifically, we are focusing on the variations of energy of Ez-electric field component concerning a time period of 100 days before and 50 days after the strong earthquake. In order to study these variations, we developed a novel method that can be divided in two stages: first we filter the signal keeping only the very low frequencies and afterwards we eliminate its trend using techniques of Singular Spectrum Analysis, combined with a third-degree polynomial filter. As it is shown, a significant increase in energy is observed for the time interval of 30 days before the strong earthquake. This result clearly indicates that the change in the energy of ULF electromagnetic waves could be related to strong precursory earthquake phenomena. Moreover, changes in energy were also observed 25 days after the strong earthquake associated with strong aftershock activity. Finally, we present results concerning the comparison in changes in Energy during night and day passes of the satellite over Haiti, which showed differences in the mean energy values, but similar results as far as the rate of energy change is concerned.
description: 16 pages, 7 figures, submitted to NHESS
Relación entre nivel de motivación y nivel de capacitación continua en recursos humanos de enfermería, hospital del conurbano bonaerense. 2020
Creators: name: Cayuqueo, Adriana Paola
Publisher: name: Zenodo
Year: 2022

description: Mantener la motivación en el personal es una estrategia inherente al buen liderazgo y gestión de los servicios de enfermería. Es por eso que este estudio tuvo como objetivo evidenciar la relación entre el nivel de motivación laboral y el nivel de capacitación continua del personal de enfermería de Servicio de Pediatría turno franquero, en un Hospital del conurbano bonaerense, en febrero 2020. Se hizo una investigación no experimental, observacional, descriptiva, de corte transversal. Se aplicó como instrumento de evaluación un cuestionario individual sobre conocimientos, actitudes y prácticas y se realizó una revisión documental referida al nivel organizacional de la institución y una matriz FODA relacionada con las motivaciones y capacitaciones del servicio de enfermería. Se obtuvo que en la muestra encuestada predomina el sexo femenino, edades comprendidas entre 31-40 años; en su mayoría son licenciados que han recibido cursos de capacitación en un tiempo menor a un año. Se observó una relación positiva en la relación de la realización de capacitaciones continuas y la motivación laboral que les proporciona mantenerse actualizados en su nivel de competencia, la posibilidad de una mejora de sueldo y en el desarrollo en su carrera profesional, obtener mejores puestos laborales y mayor estabilidad laboral. Hay dificultades en cuanto a la oferta educativa, disminución de la población docente, pobre diagnóstico de las necesidades de capacitación individuales y de la Institución, así como en la divulgación de los cursos. La estructura organizacional predominante es de tipo centralizado con ciertas autonomías de decisiones en los departamentos.
Improving breastfeeding support through the implementation of the Baby-Friendly Hospital and Community Initiatives: a scoping review
Creators: name: Walsh, Aisling
name: Pieterse, Pieternella
name: Mishra, Nita
name: Chirwa, Ellen
name: Chikalipo, Maria
name: Msosa, Chimwemwe
name: Keating, Ciara
name: Matthews, Anne
Publisher: name: University of Limerick
Year: 2023
Subjects: Education

description: Background Improved breastfeeding practices have the potential to save the lives of over 823,000 children under 5 years old globally every year. The Baby-Friendly Hospital Initiative (BFHI) is a global campaign by the World Health Organization and the United Nations Children’s Fund, which promotes best practice to support breastfeeding in maternity services. The Baby-Friendly Community Initiative (BFCI) grew out of step 10, with a focus on community-based implementation. The aim of this scoping review is to map and examine the evidence relating to the implementation of BFHI and BFCI globally. Methods This scoping review was conducted according to the Joanna Briggs Institute methodology for scoping reviews. Inclusion criteria followed the Population, Concepts, Contexts approach. All articles were screened by two reviewers, using Covidence software. Data were charted according to: country, study design, setting, study population, BFHI steps, study aim and objectives, description of intervention, summary of results, barriers and enablers to implementation, evidence gaps, and recommendations. Qualitative and quantitative descriptive analyses were undertaken. Results A total of 278 articles were included in the review. Patterns identifed were: i) national policy and health systems: efective and visible national leadership is needed, demonstrated with legislation, funding and policy; ii) hospital policy is crucial, especially in becoming breastfeeding friendly and neonatal care settings iii) implementation of specifc steps; iv) the BFCI is implemented in only a few countries and government resources are needed to scale it; v) health worker breastfeeding knowledge and training needs strengthening to ensure long term changes in practice; vi) educational programmes for pregnant and postpartum women are essential for sustained exclusive breastfeeding. Evidence gaps include study design issues and need to improve the quality of breastfeeding data and to perform prevalence and longitudinal studies. Conclusion At a national level, political support for BFHI implementation supports expansion of Baby-Friendly Hospitals. Ongoing quality assurance is essential, as is systematic (re)assessment of BFHI designated hospitals. Baby Friendly Hospitals should provide breastfeeding support that favours long-term healthcare relationships across the perinatal period. These results can help to support and further enable the efective implementation of BFHI and BFCI globally
On the nature of the spin frustration in the CuO2 ribbon chains of LiCuVO4: Crystal structure determination at 1.6 K, magnetic susceptibility analysis and density functional evaluation of the spin exchange constants
Creators: name: Koo, Hyun-Joo
name: Lee, Changhoon
name: Whangbo, Myung-Hwan
name: McIntyre, Garry J.
name: Kremer, Reinhard K.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The spin-1/2 Cu2+ ions of LiCuVO4 form one-dimensional chains along the b-direction, and the spin frustration in LiCuVO4 is described in terms of the nearest-neighbor ferromagnetic exchange J1 and the next-nearest-neighbor antiferromagnetic exchange J2 in these chains. Recently, it has become controversial whether or not J1 is stronger in magnitude than J2. To resolve this controversy, we determined the crystal structure of LiCuVO4 at 1.6 K by neutron diffraction, analyzed the magnetic susceptibility of LiCuVO4 to deduce the Curie-Weiss temperature θand the J2/J1 ratio, and finally extracted the spin exchange constants of LiCuVO4 on the basis of density functional calculations. Our work shows unambiguously that the Curie-Weiss temperature θof LiCuVO4 is negative in the range of -20 K, so that J2 is substantially stronger in magnitude than J1.
description: 30 pages, 4 tables, 4 figures
Bis-cyclometallated iridium(III) complexes bearing pyridineimine and salicylimine ancillary ligands : synthesis, characterization and applications
Creators: name: Howarth, Ashlee Joanna
Publisher: name: University of British Columbia
Year: 2015

description: Two stable diastereomeric atropisomers of a cyclometallated iridium complex containing a pyrene functionalized pyridineimine ligand have been isolated. These are the first fully characterized examples of metal containing atropisomers in which the rotational axis is not between two chelating atoms. The atropisomers can be converted thermally via a rocking motion of the pyrene moiety. A new mechanism for enhanced phosphorescence emission in the solid state (EPESS) in cyclometallated Ir complexes with the general formula [Ir(C^N)₂(N^O)] involving distortion of the six-membered chelate ring of the ancillary ligand is proposed. Photophysical and computational studies show that neither π-stacking nor restricted rotation cause the observed EPESS in these complexes and that ligand distortions in the triplet excited state are responsible for EPESS. Bis-cyclometallated Ir(III) complexes with the general formula Ir(ppz)₂(N^XPyrene) where X = N or O are shown. Modifications on the ancillary ligand containing pyrene drastically affect the emission lifetimes observed (2 μs to 104 μs). Extended emission lifetimes in these complexes compared to model complexes result from reversible electronic energy transfer or the observation of pyrene (³LC) phosphorescence. A combination of steady state and time-resolved spectroscopic techniques are used to observe reversible electronic energy transfer between the cyclometallated iridium core and the pyrene moiety in the complexes [Ir(ppz)₂(N^NPyrene)][PF₆]. Replacing the N^NPyrene ligand with an N^OPyrene ligand results in long-lived pyrene phosphorescence. Reversible electronic energy transfer as well as 3pyrene emission is observed and characterized in a PMMA film.
Phase diagram of spin-1/2 bosons in one-dimensional optical lattice
Creators: name: de Parny, L. de Forges
name: Traynard, M.
name: Hébert, F.
name: Rousseau, V. G.
name: Scalettar, R. T.
name: Batrouni, G. G.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Systems of two coupled bosonic species are studied using Mean Field Theory and Quantum Monte Carlo. The phase diagram is characterized both based on the mobility of the particles (Mott insulating or superfluid) and whether or not the system is magnetic (different populations for the two species). The phase diagram is shown to be population balanced for negative spin-dependent interactions, regardless of whether it is insulating or superfluid. For positive spin-dependent interactions, the superfluid phase is always polarized, the two populations are imbalanced. On the other hand, the Mott insulating phase with even commensurate filling has balanced populations while the odd commensurate filling Mott phase has balanced populations at very strong interaction and polarizes as the interaction gets weaker while still in the Mott phase.
The reliability of [CII] as a star formation rate indicator
Creators: name: De Looze, Ilse
name: Baes, Maarten
name: Bendo, George J.
name: Cortese, Luca
name: Fritz, Jacopo
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The [CII] 157.74 μm line is an important coolant for the neutral interstellar gas. Since [CII] is the brightest spectral line for most galaxies, it is a potentially powerful tracer of star formation activity. In this paper we present a calibration of the star formation rate as a function of the [CII] luminosity for a sample of 24 star-forming galaxies in the nearby universe. This sample includes objects classified as HII regions or LINERs, but omits all Seyfert galaxies with a significant AGN contribution to the mid-infrared photometry. In order to calibrate the SFR against the line luminosity, we rely on both GALEX FUV data, which is an ideal tracer of the unobscured star formation, and MIPS 24 μm, to probe the dust-enshrouded fraction of star formation. In case of normal star-forming galaxies, the [CII] luminosity correlates well with the star formation rate. However, the extension of this relation to more quiescent (Halpha EW <= 10 A) or ultraluminous galaxies should be handled with caution, since these objects show a non-linearity in the L([CII])-to-L(FIR) ratio as a function of L(FIR) (and thus, their star formation activity). We provide two possible explanations for the origin of the tight correlation between the [CII] emission and the star formation activity on a global galaxy-scale. A first interpretation could be that the [CII] emission from PDRs arises from the immediate surroundings of star-forming regions. Since PDRs are neutral regions of warm dense gas at the boundaries between HII regions and molecular clouds and they provide the bulk of [CII] emission in most galaxies, we believe that a more or less constant contribution from these outer layers of photon-dominated molecular clumps to the [CII] emission provides a straightforward explanation for this close link between the [CII] luminosity and SFR. Alternatively,... (abridged)
description: 14 pages, 8 figures, accepted for publication in MNRAS
Verteilen von Sensordaten über Kademlia und Gnutella
Creators: name: Sauer, Florian
Publisher: name: Zenodo
Year: 2023
Subjects: DHT, P2P, IoT

description: Beschreibung und Entwicklung einer verteilten Suche für das Auffinden von Sensoren und deren angebotener Messdaten in einem DHT System.
description: Master Thesis
Quantum phase transition in easy-axis antiferromagnetic Heisenberg spin-1 chain
Creators: name: Ren, Jie
name: Zhu, Shiqun
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The fidelity and entropy in an easy-axis antiferromagnetic Heisenberg spin-1 chain are studied numerically. By using the method of density-matrix renormalization group, the effects of anisotropy on fidelity and entanglement entropy are investigated. Their relations with quantum phase transition are analyzed. It is found that the quantum phase transition from the Haldane spin liquid to Néel spin solid can be well characterized by the fidelity. The phase transition can be hardly detected by the entropy but it can be successfully detected by the first deviation of the entropy.
description: 3 figures
Pseudosection modeling of the Precambrian meta-pelites from the Poshtuk area, NW Iran
Creators: name: Saki, Adel
name: Miri, Mirmohammad
name: Oberhänsli, Roland
Publisher: name: Periodico di Mineralogia
Year: 2021

description: Precambrian metapelites of the Poshtuk area in northwest Iran contain the prograde mineral assemblage staurolite-garnet-chloritoid-muscovite-biotite that was replaced by the assemblage garnet–staurolite–chlorite-muscovite-biotite at peak metamorphism. Whole-rock compositions of samples reveal that high Fe, Al and Mn contents of their protholite made them prone to form these assemblages. Pseudosections calculated in KFMASH, MnKFMASH, and MnNCKFMASHO systems were used to investigate the P-T evolution of the samples. They clearly show the significant effect of MnO on the stability of the chloritoid-bearing assemblages and the formation of garnet through consumption of chlorite and chloritoid. The pseudosection in a T- aH2O diagram shows that the studied assemblage could be stable only at aH2O > 0.8. XMg isopleths for garnet and biotite point to peak P-T conditions of about 3.75 kbar and 575ºC. Chloritoid is overstepped in such conditions which can be attributed to thermal perturbation due to plutonism. It is concluded, metamorphism was primarily controlled by advective heat input through magmatic intrusions in the Poshtuk area. The Precambrian basement complexes were extensively overprinted by the Pan-African Orogeny and younger igneous events which belonged to a greater Late Neoproterozoic–Early Paleozoic orogenic system that was active along the Proto-Tethyan margin of the Gondwana supercontinent.
description: Periodico di Mineralogia, Vol. 90 No. 3 (2021)
Comment on "On the ionization equilibrium of hot hydrogen plasma and thermodynamic consistency of formulating finite partition functions"
Creators: name: Potekhin, A. Y.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Zaghloul [Phys. Plasmas 17, 062701 (2010); arXiv:1010.1161v1] reconsiders the occupation probability formalism in plasma thermodynamics and claims inconsistencies in previous models. I show that the origin of this incorrect claim is an omission of the configurational factor from the partition function. This arXiv version is supplemented with two appendices, where I add remarks and comments on two more recent publications of the same author on the same subject: on his response to this Comment [Phys. Plasmas 17, 124705 (2010)] and on his criticism towards the Hummer and Mihalas's (1988) formalism [Phys. Plasmas 17, 122903 (2010); arXiv:1010.1102v1].
description: 4 pages: 2 pages of the journal publication + 2 pages of the electronic supplement
The evolution of religion and the evolution of culture
Creators: name: Davis, Taylor Thiel
Publisher: name: University of British Columbia
Year: 2014

description: The emerging science of religious evolution (the evolution of traits that distinguish religious individuals from non-religious ones) and the emerging science of cultural evolution have recently entered into a reciprocal relationship, each having something to offer the other. The theory of cultural evolution offers the field of religious evolution a powerful set of models and concepts for explaining important traits and facts that are not explained by genetic evolution. But theories of cultural evolution face their own important challenges, and theorists within the field do not agree about how cultural evolution itself should be explained, and focusing on religion makes some abstract and difficult questions in this domain more concrete and tractable. Thus, the field of religious evolution also offers the theory of cultural evolution a way of clarifying its commitments, and of demonstrating its ability to respond to important challenges. This dissertation addresses both sides of this reciprocal relationship, taking advantage of the opportunity to develop at the same time both a better understanding of the nature of religion and a better understanding of the nature of cultural phenomena in general. One goal, then, is to address philosophical, foundational questions about what religion is from within the scientific worldview. I address this general goal in two independent articles, which comprise Chapters 2 and 3. In the fourth chapter, however, I pursue a different goal, extracting from the study of religion a methodological lesson that applies for the study of cultural phenomena in general. Twenty years ago adaptationist theories in psychology appealed almost exclusively to genetic selection at the individual level, but developments since then have caused a growing number of scientists to suspect that this is too narrow a view of human evolution. I argue that the study of religion confirms these suspicions. Thus, by examining religion from the evolutionary perspective, we learn not just about the nature of religion, but also about the nature of the evolutionary perspective itself.
Tunable Superfluidity and Quantum Magnetism with Ultracold Polar Molecules
Creators: name: Gorshkov, Alexey V.
name: Manmana, Salvatore R.
name: Chen, Gang
name: Ye, Jun
name: Demler, Eugene
name: Lukin, Mikhail D.
name: Rey, Ana Maria
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: By selecting two dressed rotational states of ultracold polar molecules in an optical lattice, we obtain a highly tunable generalization of the t-J model, which we refer to as the t-J-V-W model. In addition to XXZ spin exchange, the model features density-density interactions and novel density-spin interactions; all interactions are dipolar. We show that full control of all interaction parameters in both magnitude and sign can be achieved independently of each other and of the tunneling. As a first step towards demonstrating the potential of the system, we apply the density matrix renormalization group method (DMRG) to obtain the 1D phase diagram of the simplest experimentally realizable case. Specifically, we show that the tunability and the long-range nature of the interactions in the t-J-V-W model enable enhanced superfluidity. Finally, we show that Bloch oscillations in a tilted lattice can be used to probe the phase diagram experimentally.
description: 4 pages, 3 figures
Gestión de costos de procesos de atención y cuidados pediátricos desde el liderazgo de Enfermería en la Clínica del Niño, empresa de salud privada. Ciudad de Corrientes. Provincia de Corrientes. Argentina 2020
Creators: name: Fernández, Cristina Leonor
Publisher: name: Zenodo
Year: 2022

description: La finalidad de esta investigación fue evidenciar el liderazgo de Enfermería en la gestión de costos de procesos de atención y cuidados y los indicadores e índices de gestión hospitalarios pediátricos. Se diseñó un estudio observacional, no experimental, descriptivo, transeccional, realizado durante el mes de mayo 2020, aplicando un cuestionario tipo Likert y una revisión documental de reportes contables de costo. Los principales resultados fueron: más de la mitad muestral son mujeres, predominando el grupo etario de 30 a 35 años, en relación de dependencia y con una antigüedad de 10 a 30 años, trabajando exclusivamente en esta institución. Estructura de poder centralizada y complejidad organizacional vertical, modelo de costos total. No se trabajan indicadores hospitalarios de gestión, sí indicadores referenciales: porcentaje de ocupación de camas y fórmulas de Estancia Media. No se utilizan los costos por Unidad de Producción de Enfermería de acuerdo a Categoría de Cuidados, sino por Convenios Colectivos de Trabajo. No tienen conocimiento sobre el modelo de costos afirmando estar relacionado con las Unidades de Producción de Enfermería. Se desconoce la relación entre costos hospitalarios y gestión de enfermería. La visión del liderazgo de Enfermería reconoce la gestión de costos, no aplican a costos fijos o variables. Entienden como plan de mejoras la planificación y capacitación continua. No vinculan la Unidad de Producción de Enfermería con la gestión de costo. Como prácticas relacionadas a la misma reconocen al trabajo diario con indicadores hospitalarios: promedio días de estadía y porcentaje de ocupación de camas y el PAE.
Additional file 1 of Generation and identification of a conditional knockout allele for the PSMD11 gene in mice
Creators: name: Zhao, Linlin
name: Zhao, Jinming
name: Zhang, Yingying
name: Wang, Lele
name: Zuo, Longyan
name: Niu, Airu
name: Zhang, Wei
name: Xue, Xia
name: Zhao, Suhong
name: Sun, Chao
name: Li, Kailin
name: Wang, Jue
name: Bian, Zhimin
name: Zhao, Xiaogang
name: Saur, Dieter
name: Seidler, Barbara
name: Wang, Chuanxin
name: Qi, Tonggang
Publisher: name: figshare
Year: 2021
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Environmental Sciences not elsewhere classified
subject: Astronomical and Space Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology

description: Additional file 1: Figure S1. Sequence of the final targeting vector. Homology arms are in green. cKO region is in blue. Frt sites are in violet, LoxP sites are in red. Exon 4 and 5 are underlined. Sequence confirmed regions are highlighted in yellow. Sequence in lower-case letters is sequence deleted after Flp and Cre-mediated recombination.
Additional file 1 of Chemometric-assisted UV spectrophotometric methods for determination of miconazole nitrate and lidocaine hydrochloride along with potential impurity and dosage from preservatives
Creators: name: Ashour, Esraa S.
name: El-Sayed, Ghada M.
name: Hegazy, Maha A.
name: Ghoniem, Nermine S.
Publisher: name: figshare
Year: 2025
Subjects: Biochemistry
Space Science
Biotechnology
Chemical Sciences not elsewhere classified
Biological Sciences not elsewhere classified

description: Supplementary Material 1
Engineering Long Range Distance Independent Entanglement through Kondo Impurities in Spin Chains
Creators: name: Bayat, Abolfazl
name: Sodano, Pasquale
name: Bose, Sougato
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: Information Theory (cs.IT)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We investigate the entanglement properties of the Kondo spin chain when it is prepared in its ground state as well as its dynamics following a single bond quench. We show that a true measure of entanglement such as negativity enables to characterize the unique features of the gapless Kondo regime. We determine the spatial extent of the Kondo screening cloud and propose an ansatz for the ground state in the Kondo regime accessible to this spin chain; we also demonstrate that the impurity spin is indeed maximally entangled with the Kondo cloud. We exploit these features of the entanglement in the gapless Kondo regime to show that a single local quench at one end of a Kondo spin chain may always induce a fast and long lived oscillatory dynamics, which establishes a high quality entanglement between the individual spins at the opposite ends of the chain. This entanglement is a footprint of the presence of the Kondo cloud and may be engineered so as to attain - even for very large chains- a constant high value independent of the length; in addition, it is thermally robust. To better evidence the remarkable peculiarities of the Kondo regime, we carry a parallel analysis of the entanglement properties of the Kondo spin chain model in the gapped dimerised regime where these remarkable features are absent.
Evidence of high exposure to Toxoplasma gondii in free-ranging and captive African carnivores
Creators: name: Ferreira, Susana Carolina Martins
name: Torelli, Francesca
name: Klein, Sandra
name: Fyumagwa, Robert D.
name: Karesh, William B.
name: Hofer, Heribert
name: Seeber, Frank
name: East, Marion L.
Publisher: name: Robert Koch-Institut
Year: 2018
Subjects: subject: African lion
subject: Bat-eared fox
subject: Toxoplasma gondii
subject: Parasite
subject: Serengeti ecosystem
subject: Spotted hyena
subject: 610 Medizin und Gesundheit

description: Toxoplasma gondii is an ubiquitous intracellular protozoan parasite. Mammals and birds are intermediate hosts and felid species are definitive hosts. In most human altered habitats the domestic cat is the predominant definitive host. Current knowledge of T. gondii infection in African ecosystems is limited. This study aimed to assess exposure to T. gondii in wild carnivores in the Serengeti ecosystem in East Africa. Carnivores can be infected by the consumption of tissue cysts when feeding on infected animals and by incidental ingestion of oocysts from environmental contamination. Incidental ingestion should occur regardless of a species’ diet whereas the consumption of cysts should increase the chance of infection in carnivorous species. This predicts higher seropositivity in carnivorous than in insectivorous carnivores and lower seropositivity in juvenile carnivores with a long dependency on milk than in adults. We found high seropositivity in carnivorous species: 100% (15 of 15 samples) in adult African lions, 93% (38 of 41 samples) in adult spotted hyenas and one striped hyena sample was positive, whereas all four samples from the insectivorous bat-eared fox were negative. Juvenile hyenas (11 of 19 sera) had significantly lower seropositivity than adults (38 of 41 sera). Long-term monitoring of spotted hyenas revealed no significant difference in seropositivity between two periods (1988–1992 and 2000 to 2016). Identical results were produced in lion and hyena samples by a commercial multi-species ELISA (at serum dilution 1:10) and an in-house ELISA based on a recombinant T. gondii protein (at serum dilution 1:100), making the latter a useful alternative for small amounts of serum. We suggest that diet, age and lifetime range are factors determining seropositivity in carnivores in the Serengeti ecosystem and suggest that the role of small wild felids in the spread of T. gondii in the African ecosystem warrants investigation.