Search results for "Clos"
showing 10 items of 1439 documents
Appendix: Diophantine Approximation on Hyperbolic Surfaces
2002
In this (independent) appendix, we study the Diophantine approximation properties for the particular case of the cusped hyperbolic surfaces, in the spirit of Sect. 2 (or [11]), and the many still open questions that arise for them. We refer to [9], [10]for fundamental results and further developments. We study in particular the distance to a cusp of closed geodesics on a hyperbolic surface.
Corporate social and environmental disclosure as a sustainable development tool provided by board sub-committees: Do women directors play a relevant …
2021
This is the pre-peer reviewed version of the following article: Corporate social and environmental disclosure as a sustainable development tool provided by board sub-committees: Do women directors play a relevant moderating role?, which has been published in final form at https://doi.org/10.1002/bse.2815. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions The aim of this research is to examine the impact of three audit committee characteristics on corporate social and environmental responsibility (CSR) disclosure: the existence of an audit committee, audit committee independence, and audit committee financial …
Closed Form Approximation of Swap Exposures
2013
This paper provides closed form lower and upper bounds for the price of European swaption on cross currency basis swap with the presence of dynamic basis spreads. Cross currency basis spreads are treated as integrals of spot spreads, approach familiar from interest rate models. The spot spread is modelled by two-factor mean reverting Gaussian model that is equivalent to two-factor Hull-White model introduced by [Hull and White(1994)]. This model allows closed form approximations and relatively well fitting and simple calibration to the spread term structure.
Optical counterpart to Swift J0243.6+6124
2020
Context. Swift J0243.6+6124 is a unique system. It is the first and only ultra-luminous X-ray source in our Galaxy. It is the first and only high-mass Be X-ray pulsar showing radio jet emission. It was discovered during a giant X-ray outburst in October 2017. While there are numerous studies in the X-ray band, very little is known about the optical counterpart. Aims. Our aim is to characterize the variability timescales in the optical and infrared bands in order to understand the nature of this intriguing system. Methods. We performed optical spectroscopic observations to determine the spectral type. Long-term photometric light curves together with the equivalent width of the Hα line were u…
Long Term Outcome after Application of the Angio-Seal Vascular Closure Device in Minipigs
2016
PLoS one 11(9), e0163878 (2016). doi:10.1371/journal.pone.0163878
Closing in on the toxic domain through analysis of a variant Clostridium difficile cytotoxin B
1995
Strain 1470 is the standard typing strain for serogroup F of Clostridium difficile containing both toxin genes, toxA-1470 and toxB-1470. A polymerase chain reaction (PCR)-based approach to the sequencing of the total toxB-1470 gene identified an open reading frame (ORF) of 7104 nucleotides. In comparison with the previously sequenced toxB of C. difficile VP10463, the toxB-1470 gene has 16 additional nucleotides, 13 within the 5'-untranslated region and three within the coding region. The M(r) of ToxB-1470 is 269,262, with an isoelectric point (IP) of 4.16. The equivalent values for ToxB are M(r) 269,709 and IP 4.13. In comparison with ToxB, ToxB-1470 differs primarily in the N-terminal regi…
L'influence des facteurs institutionnels sur la politique d'information financière des entreprises. Une analyse à la lumière du cas français
2009
International audience; L'influence des facteurs institutionnels sur la politique d'information financière des entreprises. Une analyse à la lumière du cas français.
The role of NF-AT transcription factors in T cell activation and differentiation11We dedicate this review to Prof. Dr. Rigomar Rieger (Gatersleben), …
2000
AbstractThe family of genuine NF-AT transcription factors consists of four members (NF-AT1 [or NF-ATp], NF-AT2 [or NF-ATc], NF-AT3 and NF-AT4 [or NF-ATx]) which are characterized by a highly conserved DNA binding domain (is designated as Rel similarity domain) and a calcineurin binding domain. The binding of the Ca2+-dependent phosphatase calcineurin to this region controls the nuclear import and exit of NF-ATs. This review deals (1) with the structure of NF-AT proteins, (2) the DNA binding of NF-AT factors and their interaction with AP-1, (3) NF-AT target genes, (4) signalling pathways leading to NF-AT activation: the role of protein kinases and calcineurin, (5) the nuclear entry and exit …
Automatic orientation and 3D modelling from markerless rock art imagery
2013
This paper investigates the use of two detectors and descriptors on image pyramids for automatic image orientation and generation of 3D models. The detectors and descriptors replace manual measurements and are used to detect, extract and match features across multiple imagery. The Scale-Invariant Feature Transform (SIFT) and the Speeded Up Robust Features (SURF) will be assessed based on speed, number of features, matched features, and precision in image and object space depending on the adopted hierarchical matching scheme. The influence of applying in addition Area Based Matching (ABM) with normalised cross-correlation (NCC) and least squares matching (LSM) is also investigated. The pipel…
Resolution of mixtures of steroidal hormones with micellar eluents of sodium dodecyl sulphate and acetonitrile or pentanol
2000
An optimization strategy was applied to explore the capability of hybrid micellar eluents of sodium dodecyl sulphate (SDS), using acetonitrile or pentanol as modifiers, to resolve mixtures of eleven steroids showing a wide range of hydrophobicity (clostebol acetate, dehydrotestosterone, dydrogesterone, medroxyprogesterone, medroxyprogesterone acetate, methandienone, methyltestosterone, progesterone, testosterone, testosterone enanthate and testosterone propionate). The accurate prediction of the retention behaviour of the steroids, with relative errors in the 0.8–1.7% and 0.4–2.9% ranges for SDS-acetonitrile and SDS-pentanol eluents, respectively, demonstrated the reliability of the methodo…