31,759 research outputs found
Linconia alopecuroidea L. 1771
No full textLinconia alopecuroidea L., Mant. Pl. Altera: 216. 1771; Pillans in J. S. African Bot. 13: 131. 1947 – Lectotype: Herb. Linn. 323.1 (LINN, lecto, designated by Hall in Regnum Veg. 127: 61. 1993).Published as part of Claßen-Bockhoff, Regine, Oliver, Edward G. H., Hall, Anthony V. & Quint, Marcus, 2019, A new classification of the South African endemic family Bruniaceae based on molecular and morphological data, pp. 1138-1155 in TAXON 60 (4) on page 1144, DOI: 10.1002/tax.604016, http://zenodo.org/record/759043
On exclusive h→Vl+l− decays
No full textWe study a set of exclusive decay modes of the Standard Model Higgs boson into a vector meson and a dilepton pair: h→Vl+l−, with V=Υ,J/ψ,φ, and l=μ,τ, determining the decay rates, the dilepton mass spectra and the V longitudinal helicity fraction distributions. In the same framework, we analyze the exclusive modes into neutrino pairs View the MathML source. We also discuss the implications of the recent CMS and ATLAS results for the lepton flavor-changing process h→τ+μ− on the h→Vτ+μ− decay mode
Neurotransmitter modulation of extracellular H+ fluxes from isolated retinal horizontal cells of the skate
No full textSelf-referencing H+-selective microelectrodes were used to measure extracellular H+ fluxes from horizontal cells isolated from the skate retina. A standing H+ flux was detected from quiescent cells, indicating a higher concentration of free hydrogen ions near the extracellular surface of the cell as compared to the surrounding solution. The standing H+ flux was reduced by removal of extracellular sodium or application of 5-(N-ethyl-N-isopropyl) amiloride (EIPA), suggesting activity of a Na+–H+ exchanger. Glutamate decreased H+ flux, lowering the concentration of free hydrogen ions around the cell. AMPA/kainate receptor agonists mimicked the response, and the AMPA/kainate receptor antagonist 6-cyano-7-nitroquinoxaline-2,3-dione (CNQX) eliminated the effects of glutamate and kainate. Metabotropic glutamate agonists were without effect. Glutamate-induced alterations in H+ flux required extracellular calcium, and were abolished when cells were bathed in an alkaline Ringer solution. Increasing intracellular calcium by photolysis of the caged calcium compound NP-EGTA also altered extracellular H+ flux. Immunocytochemical localization of the plasmalemma Ca2+–H+-ATPase (PMCA pump) revealed intense labelling within the outer plexiform layer and on isolated horizontal cells. Our results suggest that glutamate modulation of H+ flux arises from calcium entry into cells with subsequent activation of the plasmalemma Ca2+–H+-ATPase. These neurotransmitter-induced changes in extracellular pH have the potential to play a modulatory role in synaptic processing in the outer retina. However, our findings argue against the hypothesis that hydrogen ions released by horizontal cells normally act as the inhibitory feedback neurotransmitter onto photoreceptor synaptic terminals to create the surround portion of the centre-surround receptive fields of retinal neuron
A 2 h periodic variation in the low-mass X-ray binary Ser X-1
No full textSpectroscopy of the low-mass X-ray binary Ser X-1 using the Gran Telescopio Canarias have revealed a ?2 h periodic variability that is present in the three strongest emission lines. We tentatively interpret this variability as due to orbital motion, making it the first indication of the orbital period of Ser X-1. Together with the fact that the emission lines are remarkably narrow, but still resolved, we show that a main-sequence K dwarf together with a canonical 1.4 M? neutron star gives a good description of the system. In this scenario, the most likely place for the emission lines to arise is the accretion disc, instead of a localized region in the binary (such as the irradiated surface or the stream-impact point), and their narrowness is due instead to the low inclination (?10°) of Ser X-1
Obituary. Dr. V. Walter Gilbert.
No full textEditors: Aug. 1859-July 1865, J. D. White, J. H. McQuillen, G. J. Ziegler.--Aug. 1865-Dec. 1871, J. H. McQuillen, G. J. Ziegler.--Jan. 1872-May 1891, J. W. White.--July 1891-Apr. 1930, E. C. Kirk (with L. P. Anthony, Dec. 1917-Apr. 1930).--May 1930-Dec. 1936, L. P. Anthony.Vols. 1-13 are called "new series."Merged in Jan. 1937 with: Journal of the American Dental Association, ISSN 1048-6364, to form: Journal of the American Dental Association and dental cosmos, ISSN 0375-8451
Seawater redox variations during the deposition of the Kimmeridge Clay Formation, United Kingdom (Upper Jurassic): evidence from molybdenum isotopes and trace metal ratios
Get PDFThe Kimmeridge Clay Formation (KCF) and its equivalents worldwide represent one of the most prolonged periods of organic carbon accumulation of the Mesozoic. In this study, we use the molybdenum (Mo) stable isotope system in conjunction with a range of trace metal paleoredox proxies to assess how seawater redox varied both locally and globally during the deposition of the KCF. Facies with lower organic carbon contents (TOC 1–7 wt %) were deposited under mildly reducing (suboxic) conditions, while organic-rich facies (TOC >7 wt %) accumulated under more strongly reducing (anoxic or euxinic) local conditions. Trace metal abundances are closely linked to TOC content, suggesting that the intensity of reducing conditions varied repeatedly during the deposition of the KCF and may have been related to orbitally controlled climate changes. Long-term variations in ?98/95Mo are associated with the formation of organic-rich intervals and are related to third-order fluctuations in relative sea level. Differences in the mean ?98/95Mo composition of the organic-rich intervals suggest that the global distribution of reducing conditions was more extensive during the deposition of the Pectinatites wheatleyensis and lower Pectinatites hudlestoni zones than during the deposition of the upper Pectinatites hudlestoni and Pectinatites pectinatus zones. The global extent of reducing conditions during the Kimmerigidan was greater than today but was less widespread than during the Toarcian (Early Jurassic) oceanic anoxic event. This study also demonstrates that the Mo isotope system in Jurassic seawater responded to changes in redox conditions in a manner consistent with its behavior in present-day sedimentary environment
Music in words : the music of Anthony Burgess, and the role of music in his literature
No full textTheý principal focus of the thesis is Anthony Burgess, a prolific novelist whose first and
enduring creative passion was music in general and composition in particular. Burgess
criticism is limited and largely out-of-date, showing little recognition of the aural or musical
elements in his fiction, and virtually no specialist commentary on the music and its
relationships with the literature. The main aim of the thesis, therefore, is to demonstrate the
variety and strength of the widespread musical elements in Burgess's literature, including the
importance he attaches to the sonic basis of language, and to show that these are supported by
the musical sensibility and technical competence evident in his. compositions. It is suggested
that in the inevitable reassessmenot f his work following his death in 1993, the effects of his
musicianship on his literary work should play a greater part than hitherto, and the thesis makes
a contribution to this reassessmenbt oth through its original critical commentaries on his music
and through the music-orientated discussion of his literature.
After an introduction and literature review, the first chapter examines three examples of
Burgess's little-known music. All are associated with verbal texts, though the range is
otherwise wide, and through them it is possible to draw conclusions about the competence of
his handling of musical language and structure. The second and third chapters examine the
more familiar work of Burgess the acclaimed author, but from the unfamiliar viewpoint of its
musical content, including not only surface references but also hidden allusions and technical
puzzles aimed at the musician reader. Two instances of music serving as a structural template
for literature are analysed in detail, and attention is also drawn to Burgess's awareness of
musical elements in the content and language of the, work of some. of his predecessors. The
final core-chapter,e xamines the fusion of Burgess's literary and,m usical skills in the context of
his music and words for stage and radio.
What emerges is the clear intermeshing of his parallel careers;, and the production within his
distinctive literary output of work which, due to the radical extent of its musicalisation, has to
be viewed as musically-aware literature for specialised readers, at times evincing, it is
proposed, a logic which springs primarily from music
Sen and the art of educational maintenance: evidencing a capability, as opposed to an effectiveness, approach to schooling
Get PDFThere are few more widely applied terms in common parlance than ‘capability’. It is used (inaccurately) to represent everything from the aspiration to provide opportunity to notions of innate academic ability, with everything in between claiming apostolic succession to Amartya Sen, who (with apologies to Aristotle) first developed the concept. This paper attempts to warrant an adaptation of Sen’s capability theory to schooling and schooling policy, and to proof his concepts in the new setting using research involving 100 pupils from 5 English secondary schools and a schedule of questions derived from the capability literature. The findings suggest that a capability approach can provide an alternative to the dominant Benthamite school effectiveness paradigm, and can offer a sound theoretical framework for understanding better the assumed relationship between schooling and well-being
Control and Filtering for Discrete Linear Repetitive Processes with H infty and ell 2--ell infty Performance
No full textRepetitive processes are characterized by a series of sweeps, termed passes, through a set of dynamics defined over a finite duration known as the pass length. On each pass an output, termed the pass profile, is produced which acts as a forcing function on, and hence contributes to, the dynamics of the next pass profile. This can lead to oscillations which increase in amplitude in the pass to pass direction and cannot be controlled by standard control laws. Here we give new results on the design of physically based control laws for the sub-class of so-called discrete linear repetitive processes which arise in applications areas such as iterative learning control. The main contribution is to show how control law design can be undertaken within the framework of a general robust filtering problem with guaranteed levels of performance. In particular, we develop algorithms for the design of an H? and dynamic output feedback controller and filter which guarantees that the resulting controlled (filtering error) process, respectively, is stable along the pass and has prescribed disturbance attenuation performance as measured by and – norms
Book Reviews
No full textFederal conflict of laws by Michael Pryles and Peter Hanks, reviewed D. St. L. Kelly. Jessup's land titles office forms and practice (5th edition) by J. G. Maher, reviewed by Anthony P. Moore. Australian town planning law - uniformity and change by A. S. Fogg. Urban legal problems by L. A. Stein, reviewed by Anthony P. Moore. Freedom in Australia by E. Campbell and H. Whitmore, reviewed by W. B. Fisse. Criminal law (3rd ed.) by J. C. Smith and T. B. Hogan, reviewed by W. B. Fisse. The law of contempt by G. J. Borrie and N. V. Lowe, reviewed by W. B. Fisse
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