cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Application of the equipartition theorem to the thermal excitation of quartz tuning forks
Creators: name: Welker, Joachim
name: de Faria Elsner, Frederico
name: Giessibl, Franz J.
Publisher: name: Universität Regensburg
Year: 2011
Subjects: subject: atomic force microscopy; force sensors; liquid helium; noise; quartz; thermodynamic properties; vibrations;
subject: 530 Physik
subject: 07.10.Pz

description: The deflection signal of a thermally excited force sensor of an atomic force microscope can be analyzed to gain important information about the detector noise and about the validity of the equipartion theorem of thermodynamics. Here, we measured the temperature dependence of the thermal amplitude of a tuning fork and compared it to the expected values based on the equipartition theorem. In doing so, we prove the validity of these assumptions in the temperature range from 140 K to 300 K. Furthermore, the application of the equipartition theorem to quartz tuning forks at liquid helium temperatures is discussed.
Yes, I Am Ready Now: Differential Effects of Paced versus Unpaced Mating on Anxiety and Central Oxytocin Release in Female Rats
Creators: name: Nyuyki, Kewir D.
name: Waldherr, Martin
name: Baeuml, Sandra
name: Neumann, Inga D.
Publisher: name: Universität Regensburg
Year: 2011
Subjects: subject: 570 Biowissenschaften, Biologie

description: Sexual activity and partner intimacy results in several positive consequences in the context of stress-coping, both in males and females, such as reduced state anxiety in male rats after successful mating. However, in female rats, mating is a rewarding experience only when the estrous female is able to control sexual interactions, i.e., under paced-mating conditions. Here, we demonstrate that sex-steroid priming required for female mating is anxiolytic; subsequent sexual activity under paced mating conditions did not disrupt this anxiolytic priming effect, whereas mating under unpaced conditions increased anxiety-related behavior. In primed females, the release of the neuropeptide oxytocin (OT) within the hypothalamic paraventricular nucleus was found to be elevated and to further increase during paced, but not unpaced mating. Central administration of an OT receptor antagonist partly prevented priming/mating-induced anxiolysis indicating the involvement of brain OT in the anxiolysis triggered by priming and/or sexual activity. These findings reveal that the positive consequences of mating in females are dependent on her ability to control sexual interactions, and that brain OT release is at least in part the underlying neurobiological correlate.
Towards sustainable visual art practice: building capacity for improved RDM in contemporary UK visual art
Creators: name: Molloy, Laura
Publisher: name: Zenodo
Year: 2016
Subjects: subject: research data management
subject: Visual art
subject: RDM
subject: Digital preservation
subject: Digital Curation
subject: Creative research
subject: Qualitative research
subject: Social sciences
subject: FOS: Social sciences
subject: Internet studies

description: Presentation at SciDataCon 2016 by Laura Molloy on the current state of research data management in contemporary UK visual art practice.
Visión de la enfermedad renal hereditaria : El genograma, herramienta de conexión
Creators: name: Esteban-de-la-Rosa, Rafael-José
name: Bravo-Soto, Juan-Antonio
Publisher: name: Zenodo
Year: 2021

description: En esta presentación se plantea un cambio de paradigma de cómo afrontar la enfermedad renal hereditaria (ERH): además de atender las necesidades del individuo afecto, atendemos también las necesidades de la familia y nos adelantamos a los acontecimientos desde un enfoque de prevención primaria.
Observation of implicit complexity by non confluence
Creators: name: Bonfante, Guillaume
Publisher: name: arXiv
Year: 2010
Subjects: subject: Computational Complexity (cs.CC)
subject: Programming Languages (cs.PL)
subject: FOS: Computer and information sciences

description: We propose to consider non confluence with respect to implicit complexity. We come back to some well known classes of first-order functional program, for which we have a characterization of their intentional properties, namely the class of cons-free programs, the class of programs with an interpretation, and the class of programs with a quasi-interpretation together with a termination proof by the product path ordering. They all correspond to PTIME. We prove that adding non confluence to the rules leads to respectively PTIME, NPTIME and PSPACE. Our thesis is that the separation of the classes is actually a witness of the intentional properties of the initial classes of programs.
IT-­‐tool for monitoring compliance of biobanks with CEN/TS for molecular diagnostics examinations
Creators: name: Kurt Zatloukal, Cornelia Stumptner
Publisher: name: Zenodo
Year: 2017

description: In 2015   and 2016,  the   European Committee for  Standardization (CEN) published  a  series  of  CEN/TC Technical Specifications   for "Molecular   in  vitro   diagnostic  examinations   -­‐    Specifications   for   pre-­‐ examination  processes". These specifications   define  the  complete pre-analytical workflow of biological samples from collecting the sample from  the  patient to sample  transport,    processing, storage  (biobanking)  and  isolation  of    an  analyte (such   as  DNA,RNA or  protein).  They are relevant  for   biobanks,  pathologists  and    diagnostic laboratories. In ADOPT  BBMRI-­‐ERIC we    developed  together  with BBMRI-­‐ ERIC    an  online Self-­‐Assessment-­‐Tool that   allows  users   to evaluate whether their own pre-­‐analytical   processes in   the laboratory  conform  to  these  CEN/TS.  This  type   of   self-­‐assessment  is  an  important first step  towards  implementing  these   sample  quality   standards and thus improving the quality  of  biological   samples.
The Photoevaporative Wind from the Disk of TW Hya
Creators: name: Pascucci, I.
name: Sterzik, M.
name: Alexander, R. D.
name: Alencar, S. H. P.
name: Gorti, U.
name: Hollenbach, D.
name: Owens, J.
name: Ercolano, B.
name: Edwards, S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Photoevaporation driven by the central star is expected to be a ubiquitous and important mechanism to disperse the circumstellar dust and gas from which planets form. Here, we present a detailed study of the circumstellar disk surrounding the nearby star TW Hya and provide observational constraints to its photoevaporative wind. Our new high-resolution (R ~ 30,000) mid-infrared spectroscopy in the [Ne II] 12.81 μm line confirms that this gas diagnostic traces the unbound wind component within 10AU from the star. From the blueshift and asymmetry in the line profile, we estimate that most (>80%) of the [Ne II] emission arises from disk radii where the midplane is optically thick to the redshifted outflowing gas, meaning beyond the 1 or 4AU dust rim inferred from other observations. We re-analyze high-resolution (R ~ 48, 000) archival optical spectra searching for additional transitions that may trace the photoevaporative flow. Unlike the [Ne II] line, optical forbidden lines from OI, SII, and MgI are centered at the stellar velocity and have symmetric profiles. The only way these lines could trace the photoevaporative flow is if they arise from a disk region physically distinct from that traced by the [Ne II] line, specifically from within the optically thin dust gap. However, the small (~10 km/s) FWHM of these lines suggest that most of the emitting gas traced at optical wavelengths is bound to the system rather than unbound. We discuss the implications of our results for a planet-induced versus a photoevaporation-induced gap.
description: Accepted for publication in ApJ
Zur autologen Transfusion zwischenzeitlich tiefgefrorenen Blutes im Kindesalter [Autologous transfusion of blood deep frozen in the interim in childhood]
Creators: name: Kellnar, S.
name: Hansen, Ernil
name: Hofmann, U.
name: Heim, M.
name: Horst, S.
Publisher: name: Universität Regensburg
Year: 1987
Subjects: subject: 610 Medizin
subject: Adolescent
subject: Blood Transfusion, Autologous
subject: Blood Volume
subject: Child
subject: Child, Preschool
subject: Funnel Chest/surgery
subject: Humans
subject: Plasma
subject: Time Factors

description: In the report we describe a method of reducing the number of transfusions of heterologous blood in patients with a surgical correction of chest walls. In 71 children between 2 and 17 years of age, 10-15% of total blood volume were withdrawn 3-4 weeks before the operation, deep frozen and thawed at the appropriate time to be ready for retransfusion. This arrangement reduced the need of heterologous blood significantly from 18.6% (prior to the introduction of the method) to 4.2%.
Best practice document for optimal usage of omics  technologies for biomarkers
Creators: name: Anu Jalanko, Iiro Hämäläinen
Publisher: name: Zenodo
Year: 2017

description: Different omics technologies are expected to accelerate biomarker discovery and validation but  translation  of  these  technologies  into  clinically  actionable  tools  has  been  slow.  Multiple  technical platforms exist for omics profiling and there was a need to survey the operational and  quality aspects of the omics technology platforms. With the help of the National Nodes, we  produced a survey of the omics technology platforms in BBMRI-ERIC Member States.  We  received  information  from  a  total  of  54  omics  service  providers  from  twelve  BBMRI-ERIC  Member States.  Most of the results were obtained from genomics or transcriptomics platforms  where the used technologies are already well validated. In the areas of metabolomics and  proteomics the validation of technologies is still ongoing. The results of the questionnaires  indicated  that  most  of  the  omics  service  platforms  are  operating  under  quality  control  procedures but the quality of samples delivered by biobanks or researchers was generally not  followed.  The BBMRI‐ERIC associated biobanks could clearly take a prominent position in jointly  implementing international ISO and CEN/TS standards applicable for samples intended for omics  analyses.  Further collaboration with the technology platforms should be encouraged.  The  current results of the omics survey can support the biobankers and researchers to find omics  technology platforms that have open access, operate under defined quality conditions and have been utilized to analyze high quality samples of BBMRI‐ERIC biobanks or researchers utilizing  biobank samples.
Simplified method to measure glucocorticoid metabolites in faeces of horses
Creators: name: Flauger, Birgit
name: Krueger, Konstanze
name: Gerhards, Hartmut
name: Möstl, Erich
Publisher: name: Universität Regensburg
Year: 2010
Subjects: subject: ACTH challenge; enzyme immunoassay; stress behaviour; cortisol
subject: 570 Biowissenschaften, Biologie
subject: 590 Tiere (Zoologie)
subject: Adrenocorticotropic Hormone/pharmacology
subject: Animals
subject: Dexamethasone/metabolism
subject: Etiocholanolone/metabolism
subject: Feces/chemistry
subject: Female
subject: Glucocorticoids/metabolism
subject: Horses/metabolism
subject: Immunoenzyme Techniques/veterinary
subject: Male
subject: Stress, Physiological/physiology

description: Glucocorticoids or their metabolites can be measured in several body fluids or excreta, including plasma, saliva, urine and faeces. In recent years the measurement of glucocorticoid metabolites (GCMs) in faeces has gained increasing attention, because of its suitability for wild populations. In horses, however, the group-specific enzyme immunoassay described so far has a limited practicability due to its complex extraction procedure. Therefore, we tested the applicability of other enzyme immunoassays for glucocorticoid metabolites. The present study clearly proved that an enzyme immunoassay (EIA) for 11-oxoaetiocholanolone using 11-oxoaetiocholanolone-17-CMO: BSA (3alpha,11-oxo-A EIA) as antigen showed high amounts of immunoreactive substances. Therefore it was possible to use just a small amount of the supernatant of a methanolic suspension of faeces. The results correlated well with the already described method for measuring GCMs in horse faeces, i.e. analysing the samples with an EIA after a two step clean up procedure of the samples (Merl et al. 2000). In addition, the 3alpha,11-oxo-A EIA has the advantage of providing a bigger difference between baseline values and peak values after ACTH stimulation. The new assay increased the accuracy of the test, lowered the expenses per sample, and storing samples at room temperature after collection was less critical than with other assays investigated in our study. This is a big advantage both in the field of wildlife management of equids and in the field of equestrian sports and it shows the importance of choosing an assay which is in good accordance with the metabolites excreted in a given species.
Contribution of P/Q-type voltage-gated calcium channels to synaptic signaling in CA1 neurons of wildtype and familial hemiplegic migraine type-1 mice
Creators: name: Kass, Jennifer
Publisher: name: University of British Columbia
Year: 2017

description: P/Q-type voltage-gated calcium channels are essential for Ca2+ influx and neurotransmitter release in hippocampal synaptic transmission. Through alternative splicing, the exclusion or inclusion of the NP splice variant determines the classification of the P-type or Q-type channels, respectively, which differ in their sensitivity to the peptide toxin ω-Agatoxin IVA (Aga-IVA). Familial hemiplegic migraine type-1 (FHM-1) is an autosomal dominant subtype of migraine caused by gain-of-function missense mutations in the CaV2.1 subunit of P/Q-type channels. The S218L FHM-1 mutation is associated with a particularly severe clinical syndrome which includes ataxia, generalized seizures and fatal cerebral edema, and causes a hyperpolarizing shift in channel activation resulting in an increased proportion of P/Q-type channels being open at the resting membrane potential and is predicted to increase glutamate release. Increased sensitivity of Aga-IVA has been observed in synaptic signaling in CA1 hippocampal neurons of a S218L FHM-1 mouse model although the underlying mechanism is not known. Here, performing subunit and splice-variant specific quantitative real-time PCR on mouse hippocampal regions, I demonstrate that CaV channel subunits and P/Q-type splice variants are not differentially expressed between WT and S218L mice. Using whole-cell patch-clamp electrophysiology on CA1 neurons in mouse brain slices, I further show that the contribution of P/Q-, N- and R-type channels to excitatory miniature release in WT and S218L mice is highly variable. Examining the contribution of P/Q-type channels to evoked release, I show that P/Q-type channels are an important contributor towards the rate of excitatory spontaneous action potential evoked release in WT neurons. Further, that WT CA1 neurons exhibit a large unitary EPSC response evoked by paired-pulse stimulation and was reduced when P/Q-type channels were blocked. In contrast, EPSC amplitude in S218L neurons tended to be smaller compared to EPSC amplitudes from WT although this effect was not consistent. Together, these data suggest that in CA1 neurons P/Q-type channels are predominant in evoked synaptic transmission in WT neurons and that the S218L mutation appears to cause decreased action potential evoked Ca2+ influx. Further investigation is required to determine whether other VGCCs act to compensate evoked release in S218L neurons.
OPINIÓN: "LA PEOR SENTENCIA: A 150 AÑOS DE DRED SCOTT VERSUS SANDFORD "
Creators: name: Nieto Olvera, Pedro David
Publisher: name: Zenodo
Year: 2023
Subjects: DRED SCOTT
SANDFORD
Constitucional
Derecho constitucional
USA
Sentencia
esclavitud

description: En este fallo, la Corte Suprema de los EEUU declaró que las personas esclavizadas no eran ciudadanos de los EEUU, por lo que no contaban con protección del gobierno federal al no ser competente para ello. Además, el Tribunal sostuvo que el compromiso federal de Missouri que abolió la esclavitud en el territorio de Luisiana era inconstitucional porque se violaron los derechos de propiedad del esclavista sobre la persona esclavizada. 
Esta decisión hizo retroceder los esfuerzos por la abolición de la esclavitud y creó un estándar de que los afroamericanos no eran ciudadanos estadounidenses, lo que confirmaba que no tenían protecciones ni derechos constitucionales.
Modulation of histamine release by fatty acids. A new in vitro model investigating adverse drug reactions in various species
Creators: name: Ennis, M.
name: Lorenz, Wilfried
Publisher: name: Universität Regensburg
Year: 1985
Subjects: subject: 610 Medizin
subject: Alfaxalone Alfadolone Mixture/toxicity
subject: Anesthetics/toxicity
subject: Animals
subject: Dogs
subject: Fatty Acids/pharmacology
subject: Female
subject: Glycerol/toxicity
subject: Guinea Pigs
subject: Histamine/blood
subject: Histamine Release/drug effects
subject: Humans
subject: Male
subject: Mast Cells/secretion
subject: Propanidid/toxicity
subject: Rats

description: Histamine release caused by drugs and/or their solvents is a well known phenomenon. In this study, both in vivo (anaesthetized and conscious dogs) and in vitro (isolated rat peritoneal, human and guinea-pig lung mast cells) models were used. Cremophor E1 and six derivatives of 12-hydroxystearic acid were compared for their histamine releasing abilities. Although the three types of isolated mast cells responded similarly, histamine release being observed with DH (the diester of 12-hydroxystearic acid with polyethylene glycol), TN (12-hydroxystearic acid polymerized with ethylene oxide) and ME (the monoester of 12-hydroxystearic acid esterified with polyethylene glycol), the anaesthetized dog exhibited elevated blood histamine levels and clinical symptoms after administration of all the solubilizing agents, except TN and ME. The reasons for this discrepancy are not known. The addition of the drugs (Althesin or propanidid) to their solubilizing agents caused histamine release, which was not observed with the solubilizing agent alone. This is the first demonstration of an in vitro model, which copies the clinical situation, i.e. solvent does nothing but the solvent plus drug combination causes histamine release and hence adverse reactions.
Self-repairing Homomorphic Codes for Distributed Storage Systems
Creators: name: Oggier, Frederique
name: Datta, Anwitaman
Publisher: name: arXiv
Year: 2010
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: Erasure codes provide a storage efficient alternative to replication based redundancy in (networked) storage systems. They however entail high communication overhead for maintenance, when some of the encoded fragments are lost and need to be replenished. Such overheads arise from the fundamental need to recreate (or keep separately) first a copy of the whole object before any individual encoded fragment can be generated and replenished. There has been recently intense interest to explore alternatives, most prominent ones being regenerating codes (RGC) and hierarchical codes (HC). We propose as an alternative a new family of codes to improve the maintenance process, which we call self-repairing codes (SRC), with the following salient features: (a) encoded fragments can be repaired directly from other subsets of encoded fragments without having to reconstruct first the original data, ensuring that (b) a fragment is repaired from a fixed number of encoded fragments, the number depending only on how many encoded blocks are missing and independent of which specific blocks are missing. These properties allow for not only low communication overhead to recreate a missing fragment, but also independent reconstruction of different missing fragments in parallel, possibly in different parts of the network. We analyze the static resilience of SRCs with respect to traditional erasure codes, and observe that SRCs incur marginally larger storage overhead in order to achieve the aforementioned properties. The salient SRC properties naturally translate to low communication overheads for reconstruction of lost fragments, and allow reconstruction with lower latency by facilitating repairs in parallel. These desirable properties make self-repairing codes a good and practical candidate for networked distributed storage systems.
Qualitative modelling and analysis of regulations in multi-cellular systems using Petri nets and topological collections
Creators: name: Giavitto, Jean-Louis
name: Klaudel, Hanna
name: Pommereau, Franck
Publisher: name: arXiv
Year: 2010
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Computer and information sciences
subject: J3; I.6.5; I.6.4; D.2.2

description: In this paper, we aim at modelling and analyzing the regulation processes in multi-cellular biological systems, in particular tissues. The modelling framework is based on interconnected logical regulatory networks a la Rene Thomas equipped with information about their spatial relationships. The semantics of such models is expressed through colored Petri nets to implement regulation rules, combined with topological collections to implement the spatial information. Some constraints are put on the the representation of spatial information in order to preserve the possibility of an enumerative and exhaustive state space exploration. This paper presents the modelling framework, its semantics, as well as a prototype implementation that allowed preliminary experimentation on some applications.
description: In Proceedings MeCBIC 2010, arXiv:1011.0051
Element method for epitaxial growth with attachment-detachment kinetics
Creators: name: Bänsch, Eberhard
name: Haußer, Frank
name: Lakkis, Omar
name: Li, Bo
name: Voigt, Axel
Publisher: name: Weierstrass Institute
Year: 2003
Subjects: subject: epitaxial growth
subject: island dynamics
subject: free or moving boundary problem
subject: adatom diffusion
subject: attachment-detachment kinetics
subject: surface diffusion
subject: mean curvature flow
subject: finite elements
subject: adaptivity
subject: front tracking
subject: 35Q99
subject: 35R35
subject: 65N30
subject: 65Z05
subject: 74S05

description: An adaptive finite element method is developed for a class of free or moving boundary problems modeling island dynamics in epitaxial growth. Such problems consist of an adatom (adsorbed atom) diffusion equation on terraces of different height, boundary conditions on terrace boundaries including the kinetic asymmetry in the adatom attachment and detachment, and the normal velocity law for the motion of such boundaries determined by a two-sided flux, together with the one-dimensional "surface" diffusion. The problem is solved using two independent meshes: a two-dimensional mesh for the adatom diffusion and a one-dimensional mesh for the boundary evolution. The diffusion equation is discretized by the first-order implicit scheme in time and the linear finite element method in space. A technique of extension is used to avoid the complexity in the spatial discretization near boundaries. All the elements are marked, and the marking is updated in each time step, to trace the terrace height. The evolution of the terrace boundaries includes both the mean curvature flow and the surface diffusion. Its governing equation is solved by a semi-implicit front-tracking method using parametric finite elements. Simple adaptive techniques are employed in solving the adatom diffusion as well as the boundary motion problem. Numerical tests on pure geometrical motion, mass balance, and the stability of a growing circular island demonstrate that the method is stable, efficient, and accurate enough to simulate the growing of epitaxial islands over a sufficiently long time period.
Induction of cytolytic T lymphocytes directed towards the V3 loop of the human immunodeficiency virus type 1 external glycoprotein gp120 by p55gag/V3 chimeric vaccinia viruses
Creators: name: Wagner, Ralf
name: Böltz, T.
name: Deml, Ludwig
name: Modrow, Susanne
name: Wolf, Hans J.
Publisher: name: Universität Regensburg
Year: 1993
Subjects: subject: 610 Medizin
subject: AIDS Vaccines/isolation & purification
subject: Amino Acid Sequence
subject: Animals
subject: Antibodies, Monoclonal
subject: Base Sequence
subject: Cell Line
subject: Cytotoxicity, Immunologic
subject: Epitopes/immunology
subject: Gene Products, gag/isolation & purification
subject: Genes, gag
subject: HIV Envelope Protein gp120/isolation & purification
subject: HIV-1/immunology
subject: Mice
subject: Mice, Inbred BALB C
subject: Molecular Sequence Data
subject: Oligodeoxyribonucleotides
subject: Recombinant Fusion Proteins/isolation & purification
subject: T-Lymphocytes, Cytotoxic/immunology
subject: Vaccinia virus/isolation & purification

description: T cell-mediated cytotoxicity may play an important role in controlling infection by human immunodeficiency virus (HIV). In order to study the ability of rationally designed antigens to induce cytolytic T lymphocytes (CTLs) we replaced stretches of 30 to 50 amino acids at the p17-MA/p24-CA cleavage site, within the p24-CA moiety and within the p6-LI portion of the HIV type 1 p55gag precursor by the third variable domain (V3) of the external glycoprotein gp120. This site is known to be a target for CTL attack in mice and humans. The chimeric antigens were recombined into highly attenuated vaccinia viruses in order to investigate class I major histocompatibility complex (MHC)-restricted presentation of antigenic V3 peptides. Immunoprecipitation and Western blot analysis of the group-specific antigen (p55gag)/V3 chimeric proteins demonstrated significant differences in the accessibility of the V3 domain for a monoclonal antibody or polyclonal V3-specific antisera, depending on the position of the V3 loop within the p55gag carrier protein. Immunization of BALB/c mice with three variants of p55gag/V3 recombinant vaccinia virus, however, resulted in a comparable priming of CD4-CD8+ CTLs in vivo irrelevant of the position of the V3 loop within p55gag. Local conformational changes, including the V3 domain within the p55gag/V3 chimeras, did not demonstrate a significant effect on V3-specific lysis of the target cells when compared to the authentic gp120 envelope protein. Class I MHC-restricted CTLs induced by a V3 consensus sequence cross-reacted perfectly with the LAI strain-derived V3 loop sequence. These data indicate that the combination of selected epitopes (V3) with immunologically relevant complex carrier proteins (p55gag) can be accomplished without the loss of biological activity.
General Ramified Recurrence is Sound for Polynomial Time
Creators: name: Lago, Ugo Dal
name: Martini, Simone
name: Zorzi, Margherita
Publisher: name: arXiv
Year: 2010
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Computational Complexity (cs.CC)
subject: FOS: Computer and information sciences
subject: F.4.1; F.1.3

description: Leivant's ramified recurrence is one of the earliest examples of an implicit characterization of the polytime functions as a subalgebra of the primitive recursive functions. Leivant's result, however, is originally stated and proved only for word algebras, i.e. free algebras whose constructors take at most one argument. This paper presents an extension of these results to ramified functions on any free algebras, provided the underlying terms are represented as graphs rather than trees, so that sharing of identical subterms can be exploited.
Orthoscapheus planaltinus Roberts & Carbonell 1981
Creators: name: Monné, Miguel A.
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy

description: Holotype male: Brazil, Pernambuco: Fernando de Noronha (Praia do Boldró), VI.1991, M.J. Souza Lopes, A. Mesa & C.S. Carbonell, MNRJ-ENT6-019243. Paratypes, 2 males, 2 females, same data, MNRJ-ENT6-019244-019246. 79. Orthoscapheus planaltinus Roberts & Carbonell, 1981: 11
Holotype male: Brazil, Mato Grosso: Diamantino, BR 163, km 200, V.1980, B. Silva, MNRJ-ENT6-019175. Allotype, same data, MNRJ-ENT6-019176.
description: Published as part of Monné, Miguel A., 2018, An updated list of the type specimens of Caelifera (Orthoptera) in the Museu Nacional, Rio de Janeiro, pp. 73-99 in Zootaxa 4462 (1) on pages 80-81, DOI: 10.11646/zootaxa.4462.1.3, http://zenodo.org/record/1441436
Nonlinear optical response of triple-mode silicon photonic crystal microcavities coupled to single channel input and output waveguides
Creators: name: Schelew, Ellen N.
Publisher: name: University of British Columbia
Year: 2017

description: Optical and opto-electronic components play important roles in both classical and quantum information processing technologies. Despite fundamental differences in these technologies, both stand to benefit greatly from moving away from bulky, individually packaged components, toward a scalable platform that supports dense integration of low power consumption devices. Planar photonic circuits, composed of devices etched in a thin slab of high refractive index material, are considered an excellent candidate, and have been used to realize many key components, including low-loss waveguides, light sources, detectors, modulators, and spectral filters. In this dissertation, a novel triple-microcavity structure was designed, externally fabricated, and its linear and nonlinear optical properties were thoroughly characterized. The best of the structures exhibited both high four-wave mixing conversion efficiencies and low threshold optical bistability, which are relevant to frequency conversion and all-optical switching applications. The device consisted of three coupled photonic crystal (PC) microcavities with three nearly equally spaced resonant frequencies near telecommunication wavelengths (λ ~ 1.5 μm), with high quality factors (~ 10⁵, 10⁴ and 10³). The microcavity system was coupled to independent input and output PC waveguides, and the cavity-waveguide coupling strengths were engineered to maximize the coupling of the input waveguide to the central mode, and the output waveguide to the two modes on either side. A novel and sophisticated measurement and analysis protocol was developed to characterize the devices. This involved measuring and modelling the linear and nonlinear transmission characteristics of each of the modes separately with a single tunable laser, as well as the frequency conversion efficiency (via stimulated four-wave mixing) when two tunable lasers pumped two of the modes, and the power generated in the third mode was monitored. Comparisons of the entire set of model and experimental results led to the conclusion that this structure can be used to achieve both low-power-threshold optical switching and high efficiency four-wave-mixing-based frequency conversion. The advantages of this structure over others in the literature are its small footprint, multi-mode functionality and independent input and output channels. The main disadvantage that requires further refinement, has to do with its sensitivity to fabrication imperfections.
Closed Timelike Curves in Relativistic Computation
Creators: name: Andréka, Hajnal
name: Németi, István
name: Székely, Gergely
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: Logic (math.LO)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: In this paper, we investigate the possibility of using closed timelike curves (CTCs) in relativistic hypercomputation. We introduce a wormhole based hypercomputation scenario which is free from the common worries, such as the blueshift problem. We also discuss the physical reasonability of our scenario, and why we cannot simply ignore the possibility of the existence of spacetimes containing CTCs.
description: 17 pages, 5 figures
Switching Spin and Charge between Edge States in Topological Insulator Constrictions
Creators: name: Krueckl, Viktor
name: Richter, Klaus
Publisher: name: Universität Regensburg
Year: 2011
Subjects: subject: 530 Physik
subject: 73.23.-b, 85.35.Ds, 85.75.Hh

description: We show how the coupling between opposite edge states, which overlap in a constriction made of the topological insulator mercury telluride (HgTe), can be employed both for steering the charge flow into different edge modes and for controlled spin switching. Unlike in a conventional spin transistor, the switching does not rely on a tunable Rashba spin-orbit interaction, but on the energy dependence of the edge state wave functions. Based on this mechanism, and supported by extensive numerical transport calculations, we present two different ways to control spin and charge currents, depending on the local gating of the constriction, resulting in a high fidelity spin transistor.
Aplicação de Realidade Aumentada para a vistoria de entrega de obras de edificações residenciais
Creators: name: Sarge, Marcos
name: Mitidieri Filho, Claudio Vicente
Publisher: name: figshare
Year: 2022
Subjects: subject: 90599 Civil Engineering not elsewhere classified
subject: FOS: Civil engineering
subject: 90502 Construction Engineering

description: Com o advento dos dispositivos user-friendly e pela utilização de tecnologias presentes nos smart devices por meio de aplicações de Realidade Aumentada (RA), pode ser facilitada a entrega da unidade habitacional ao cliente, demonstrando ao futuro usuário os aspectos relacionados à qualidade e ao desempenho do sistema construtivo e da unidade habitacional. Tais tecnologias podem armazenar informações que suprem o conhecimento técnico de quem vai entregar e de quem vai receber a edificação ou a unidade, contendo informações de incorporação e de construção
Hamiltonian formulation for the theory of gravity and canonical transformations in extended phase space
Creators: name: Shestakova, T. P.
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A starting point for the present work was the statement recently discussed in the literature that two Hamiltonian formulations for the theory of gravity, the one proposed by Dirac and the other by Arnowitt - Deser - Misner, may not be related by a canonical transformation. In its turn, it raises a question about the equivalence of these two Hamiltonian formulations and their equivalence to the original formulation of General Relativity. We argue that, since the transformation from components of metric tensor to the ADM variables touches gauge degrees of freedom, which are non-canonical from the point of view of Dirac, the problem cannot be resolved in the limits of the Dirac approach. The proposed solution requires the extension of phase space by treating gauge degrees of freedom on an equal footing with other variables and introducing missing velocities into the Lagrangian by means of gauge conditions in differential form. We illustrate with a simple cosmological model the features of Hamiltonian dynamics in extended phase space. Then, we give a clear proof for the full gravitational theory that the ADM-like transformation is canonical in extended phase space in a wide enough class of possible parametrizations.
description: 18 pages, accepted for publication in Class. Quantum Grav
General Solutions of Braneworlds under the Schwarzschild Ansatz
Creators: name: Akama, Keiichi
name: Hattori, Takashi
name: Mukaida, Hisamitsu
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: General solutions for braneworld dynamics coupled with the bulk Einstein equation are derived under the Schwarzschild ansatz. They relate the brane metric to the exterior configurations, and establish fine tuning conditions for the braneworlds to reproduce successes of the Einstein gravity.
description: 4 pages
3D MHD simulations of the magnetized O star wind of theta 1 Orionis C
Creators: name: Gagné, Marc
name: ud-Doula, Asif
name: Schulz, Norbert
name: Huenemoerder, David
name: Balsara, Dinshaw
name: Subramanian, Sethupathy
Publisher: name: Zenodo
Year: 2021
Subjects: X-rays: stars
stars: massive
stars: mass-loss
stars: magnetic field
stars: early-type

description: It has been nearly twenty years since a magnetic field was discovered on the O7 Vp star \(\theta^1\) Orionis C - the central star of the Orion Nebula. I will discuss recent efforts to model its magnetic field with the MHD code PLUTO, and with a new Geodesic mesh code. I will also discuss the Chandra HETG spectrum obtained as part of a Very Large Program to observe the Trapezium cluster.
description: {"references": ["Balsara, D. S., et al. 2019, MNRAS, 487, 1283", "Daley-Yates, S., Stevens, I. R. & ud-Doula, A. 2019, MNRAS, 489, 3251", "Florinski, V., et al. 2020, ComAC, 7, 1", "Gagne, M., et al. 2005, ApJ, 628, 986", "Simon-Diaz, S., et al. 2006, A&A, 448, 351", "Subramanian, S., et al. 2020, MNRAS, in press", "ud-Doula, A., et al. 2013, MNRAS, 428, 2723", "Wade, G. A., et al. 2016, MNRAS, 456, 2"]}
Advierte Universidad de Navojoa sobre el consumo de “dogos”.
Creators: name: Solis Valladares, Victor Hugo
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 321004
subject: Nutritional science
classificationCode: 321005
subject: Public health nutrition

description: Un estudio elaborado por la Escuela de Salud de la Universidad de Navojoa (UNAV), denominado “Autopsia de un hot dog”, concluyó que consumir un “dogo” es aportar al cuerpo el 30% de la grasa total del día.
A New Email Retrieval Ranking Approach
Creators: name: AbdelRahman, Samir
name: Hassan, Basma
name: Bahgat, Reem
Publisher: name: arXiv
Year: 2010
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: Email Retrieval task has recently taken much attention to help the user retrieve the email(s) related to the submitted query. Up to our knowledge, existing email retrieval ranking approaches sort the retrieved emails based on some heuristic rules, which are either search clues or some predefined user criteria rooted in email fields. Unfortunately, the user usually does not know the effective rule that acquires best ranking related to his query. This paper presents a new email retrieval ranking approach to tackle this problem. It ranks the retrieved emails based on a scoring function that depends on crucial email fields, namely subject, content, and sender. The paper also proposes an architecture to allow every user in a network/group of users to be able, if permissible, to know the most important network senders who are interested in his submitted query words. The experimental evaluation on Enron corpus prove that our approach outperforms known email retrieval ranking approaches.
Crystallization and thermo-viscoelastic modelling of polymer composites
Creators: name: Gordnian, Kamyar
Publisher: name: University of British Columbia
Year: 2017

description: Process models of composite materials are useful tools for understanding the effect of process parameters and variables and reducing manufacturing risks and costs. The sub-model approach for process modelling has been applied to thermoset composites since the early 1980s. In this approach, analysis is performed with different sub-models such as thermochemical, flow, void and stress, and the analysis results are sequentially transferred from one sub-model to the next, until the analysis is complete. In recent years there has been growing use of high performance thermoplastics such as PEEK and PEKK in aircraft structures, and hence process models for thermoplastics are increasingly of interest. During processing of thermoplastic materials, the material undergoes both melting and crystallization. Therefore a major component of the thermochemical/thermophysical sub-model for process modelling of thermoplastics is the crystallization/melt kinetics model. Most of the crystallization kinetics models in the literature are only valid for either constant temperatures or cooling at constant cooling rates. Furthermore, the number of melt kinetics models is very limited and their application restricted to small heating rates. As a material point in the part may undergo complex temperature cycles, a rate-type crystallization/melt kinetics model which is independent of the temperature cycle is desired. Another problem in processing is development of residual stresses and distortions, which are analyzed in the stress sub-model using mechanical response constitutive models such as thermo-elastic, CHILE and viscoelastic. Most thermoplastic materials such as PEEK are indeed viscoelastic, however their unrelaxed values of moduli are temperature dependent, ie their behaviour is ‘thermo-rheologically complex’. In this thesis the crystallization and melt behaviour of PEEK carbon fibre composites is investigated using DSC experiments. A rate type crystallization kinetics model is developed for prediction of degree of crystallinity during crystallization process. A concept of ‘master melt curve’ is introduced and is used along with the crystallization kinetics model for prediction of crystallinity change during an arbitrary process. Thermo-viscoelastic behaviour of the material is studied using DMA experiments. A thermo-viscoelastic (TVE) constitutive model is developed and is generalized to three dimensional cases. Some case studies are analyzed and validity of models are investigated.
Safe Recursion on Notation into a Light Logic by Levels
Creators: name: Roversi, Luca
name: Vercelli, Luca
Publisher: name: arXiv
Year: 2010
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Computational Complexity (cs.CC)
subject: FOS: Computer and information sciences

description: We embed Safe Recursion on Notation (SRN) into Light Affine Logic by Levels (LALL), derived from the logic L4. LALL is an intuitionistic deductive system, with a polynomial time cut elimination strategy. The embedding allows to represent every term t of SRN as a family of proof nets |t|^l in LALL. Every proof net |t|^l in the family simulates t on arguments whose bit length is bounded by the integer l. The embedding is based on two crucial features. One is the recursive type in LALL that encodes Scott binary numerals, i.e. Scott words, as proof nets. Scott words represent the arguments of t in place of the more standard Church binary numerals. Also, the embedding exploits the "fuzzy" borders of paragraph boxes that LALL inherits from L4 to "freely" duplicate the arguments, especially the safe ones, of t. Finally, the type of |t|^l depends on the number of composition and recursion schemes used to define t, namely the structural complexity of t. Moreover, the size of |t|^l is a polynomial in l, whose degree depends on the structural complexity of t. So, this work makes closer both the predicative recursive theoretic principles SRN relies on, and the proof theoretic one, called /stratification/, at the base of Light Linear Logic.
Autologe Transfusion bei Skolioseoperationen: Präoperative Eigenblutspende und intraoperative maschinelle Autotransfusion [Autologous transfusion in scoliosis operations: preoperative autologous blood donations and intraoperative mechanical autotransfusion]
Creators: name: Hansen, Ernil
name: Pollwein, B.
name: Martin, E.
name: Heim, M. U.
name: Horst, S.
name: Matzen, K. A.
name: Peter, K.
Publisher: name: Universität Regensburg
Year: 1987
Subjects: subject: 610 Medizin
subject: Adolescent
subject: Blood Preservation
subject: Blood Transfusion, Autologous/instrumentation
subject: Blood Volume
subject: Freezing
subject: Humans
subject: Scoliosis/surgery
subject: Spinal Fusion

description: Autologous transfusion was used to reduce the high demand for blood accompanied with scoliosis surgery. Half of the blood loss could be saved by intraoperative autotransfusion (35 patients). This resulted in a corresponding reduction in homologous transfusion. An elimination of the need for homologous blood could be achieved only by the combination of preoperative blood donation and intraoperative autotransfusion (37 patients). With freezing the predeposit blood was independent of storage time and autologous plasma was available. Thus, the risks of transfusion can be avoided.
Disentangle plume-induced anisotropy in the velocity field in buoyancy-driven turbulence
Creators: name: Zhou, Quan
name: Xia, Ke-Qing
Publisher: name: arXiv
Year: 2011
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We present a method of disentangling the anisotropies produced by the cliff structures in turbulent velocity field and test it in the system of turbulent Rayleigh-Bénard (RB) convection. It is found that in the RB system the cliff structures in the velocity field are generated by thermal plumes. These cliff structures induce asymmetry in the velocity increments, which leads us to consider the plus and minus velocity structure functions (VSF). The plus velocity increments exclude cliff structures, while the minus ones include them. Our results show that the scaling exponents of the plus VSFs are in excellent agreement with those predicted for homogeneous and isotropic turbulence (HIT), whereas those of the minus VSFs exhibit significant deviations from HIT expectations in places where thermal plumes abound. These results demonstrate that plus and minus VSFs can be used to quantitatively study the effect of cliff structures in the velocity field and to effectively disentangle the associated anisotropies caused by these structures.
description: 10 pages, 5 figures
Church => Scott = Ptime: an application of resource sensitive realizability
Creators: name: Brunel, Aloïs
name: Terui, Kazushige
Publisher: name: arXiv
Year: 2010
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: We introduce a variant of linear logic with second order quantifiers and type fixpoints, both restricted to purely linear formulas. The Church encodings of binary words are typed by a standard non-linear type `Church,' while the Scott encodings (purely linear representations of words) are by a linear type `Scott.' We give a characterization of polynomial time functions, which is derived from (Leivant and Marion 93): a function is computable in polynomial time if and only if it can be represented by a term of type Church => Scott. To prove soundness, we employ a resource sensitive realizability technique developed by Hofmann and Dal Lago.
Fermi Gamma-ray Space Telescope: High-Energy Results from the First Year
Creators: name: Michelson, Peter F.
name: Atwood, William B.
name: Ritz, Steven
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The Fermi Gamma-ray Space Telescope (Fermi) was launched on June 11, 2008 and began its first year sky survey on August 11, 2008. The Large Area Telescope (LAT), a wide field-of-view pair-conversion telescope covering the energy range from 20 MeV to more than 300 GeV, is the primary instrument on Fermi. While this review focuses on results obtained with the LAT, the Gamma-ray Burst Monitor (GBM) complements the LAT in its observations of transient sources and is sensitive to X-rays and gamma-rays with energies between 8 keV and 40 MeV. During the first year in orbit, the Fermi LAT has observed a large number of sources that include active galaxies, pulsars, compact binaries, globular clusters, supernova remnants, as well as the Sun, the Moon and the Earth. The GBM and LAT together have uncovered surprising characteristics in the high-energy emission of gamma-ray bursts (GRBs) that have been used to set significant new limits on violations of Lorentz invariance. The Fermi LAT has also made important new measurements of the Galactic diffuse radiation and has made precise measurements of the spectrum of cosmic-ray electrons and positrons from 20 GeV to 1 TeV.
description: 39 pages, 16 figures