Browsing Faculty of Natural and Agricultural Sciences by Title
Now showing items 2908-2927 of 4825
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Multi-band implications of external-IC flares
(Elsevier, 2015)Very fast variability on scales of minutes is regularly observed in Blazars. The assumption that these flares are emerging from the dominant emission zone of the very high energy (VHE) radiation within the jet challenges ... -
Multi-locus phylogeny and evolution of reproductive modes in the Pyxicephalidae, an African endemic clade of frogs
(Unisa Press/Taylor & Francis, 2011)The ranoid family Pyxicephalidae is an endemic group of African frogs, with the majority of its diversity concentrated in South Africa. Here we present the first molecular phylogeny that includes as many as nine of the ten ... -
Multi-media for flipped classrooms: engaged nutrition learning in a multi-media enhanced flipped classroom
(Unisa, 2015)This article focuses on the experiences of Health Science students changing from a traditional lecturer–centred, face–to–face teaching scenario to a multi–modal learning experience in a flipped classroom. Getting students ... -
Multi-messenger observations of a binary neutron star merger
(IOP Publishing, 2017)On 2017 August 17 a binary neutron star coalescence candidate (later designated GW170817) with merger time 12:41:04 UTC was observed through gravitational waves by the Advanced LIGO and Advanced Virgo detectors. The Fermi ... -
Multi-TeV emission from the Vela pulsar
(IOP Publishing, 2018)Pulsed emission from the Vela pulsar at energies above 3 TeV has recently been detected by the High Energy Stereoscopic System (H.E.S.S.) Collaboration. We present a model for the broadband spectrum of Vela from infrared ... -
Multi-wavelength modeling of globular clusters: the millisecond pulsar scenario
(IOP Publishing, 2013)The potentially large number of millisecond pulsars (MSPs) in globular cluster (GC) cores makes these parent objects ideal laboratories for studying the collective properties of an ensemble of MSPs. Such a population is ... -
Multi-wavelength observations of flaring blazars with ATOM and Fermi-LAT
(Sissa Medialab, 2017)The Automatic Telescope for Optical Monitoring is a 75cm optical telescope located at the H.E.S.S. site in Namibia. Since 2005, it monitors around 250 gamma-ray emitting AGN and has observed numerous blazar flares in several ... -
Multi-wavelength observations of H 2356-309
(EDP Sciences, 2010)Aims. The properties of the broad-band emission from the high-frequency peaked BL Lac H 2356–309 (z = 0.165) are investigated. Methods. Very high energy (VHE; E > 100 GeV) observations of H 2356–309 were performed with ... -
Multi-wavelength study of flaring activity in BL Lac object S5 0716+714 during the 2015 outburst
(American Astronomical Society, 2015)We present a detailed investigation of the flaring activity observed from a BL Lac object, S5 0716+714 , during its brightest ever optical state in the second half of 2015 January. Observed almost simultaneously in the ... -
Multi-wavelength variability signatures of relativistic shocks in blazar jets
(IOP Publishing, 2019)Mildly relativistic shocks that are embedded in colliding magnetohydrodynamic flows are prime sites for relativistic particle acceleration and the production of strongly variable, polarized multi-wavelength emission from ... -
Multiband optical-NIR variability of blazars on diverse time-scales
(Oxford University Press, 2015)To search for optical variability on awide range of time-scales,we have carried out photometric monitoring of two flat spectrum radio quasars, 3C 454.3 and 3C 279, plus one BL Lac, S5 0716+714, all of which have been ... -
Multicontamination phenomena occur more often than expected in Mediterranean coastal watercourses: study case of the Têt River (France)
(Elsevier, 2017)Contaminants found in watercourses are not only the result of anthropogenic activities but also depend on river's seasonal hydrodynamics. This is particularly true in Mediterranean climate regions where long dry periods ... -
A multidisciplinary approach for the assessment of rehabilitation at asbestos mines in South Africa
(Sringer, 2012)The asbestos mining industry has left a legacy of pollution that continues to poison former mining areas and surrounding land-posing a significant health risk to local communities. In order to assist the effective ... -
Multifrequency observations of the candidate neutrino-emitting blazar BZB J0955+3551
(IOP Publishing, 2020)The recent spatial and temporal coincidence of the blazar TXS 0506+056 with the IceCube-detected neutrino event IC-170922A has opened up a realm of multimessenger astronomy with blazar jets as a plausible site of cosmic-ray ... -
Multilingual pronunciations of proper names in a Southern African corpus
(Pattern recognition association of South Africa (PRASA), 2012)We present our process for the development and analysis of a multilingual names corpus, called Multipron-split. It is derived from Multipron, a corpus collected in previous work [1], where names and speakers were drawn ... -
Multiple daytime nucleation events in semi-clean savannah and industrial environments in South Africa: analysis based on observations
(EGU, 2013)Recent studies have shown very high frequencies of atmospheric new particle formation in different environments in South Africa. Our aim here was to investigate the causes for two or three consecutive daytime nucleation ... -
Multiple emergences of genetically diverse amphibian-infecting chytrids include a globalized hypervirulent recombinant lineage
(National Academy of Sciences, 2011)Batrachochytrium dendrobatidis (Bd) is a globally ubiquitous fungal infection that has emerged to become a primary driver of amphibian biodiversity loss. Despite widespread effort to understand the emergence of this ... -
Multiple outflows in the high-mass cluster-forming region G25.82-0.17
(IOP Publishing, 2020)We present results of continuum and spectral line observations with Atacama Large Millimeter/submillimeter Array (ALMA) and 22 GHz water (H2O) maser observations using the KVN (Korean VLBI Network) and VERA (VLBI Exploration ... -
Multiplication operators on non-commutative spaces
(Elsevier, 2019)Boundedness and compactness properties of multiplication operators on quantum (non-commutative) function spaces are investigated. For endomorphic multiplication operators these properties can be characterized in the setting ...