Browsing University of Hertfordshire by Title
Now showing items 23295-23314 of 24235
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Vertex Lie algebras and cyclotomic coinvariants
(2016-03-30)Given a vertex Lie algebra $\mathscr L$ equipped with an action by automorphisms of a cyclic group $\Gamma$, we define spaces of cyclotomic coinvariants over the Riemann sphere. These are quotients of tensor products of ... -
Vertex Representations for Yangians of Kac-Moody algebras
(2019-09-26)Using vertex operators, we build representations of the Yangian of a simply laced Kac-Moody algebra and of its double. As a corollary, we prove the PBW property for simply laced affine Yangians. -
Vertical dispersal of plant pathogens by splashing. Part II : experimental study of the relationship between raindrop size and the maximum splash height
(1989-03)This paper describes a simple experimental test of the theoretical relationship between raindrop diameter and maximum splash height proposed by Walklate (1989). This relationship contains two empirical parameters to model ... -
Vertical profiles of atmospheric particle parameters measured with a scanning 6-wavelength 11-channel aerosol lidar
(SPIE, 2003)The transportable scanning six-wavelength eleven-channel aerosol lidar of the Insitute for Tropospheric Research represents the most powerful tool for a comprehensive characterization of atmospheric particles with lidar. ... -
Vertical profiles of pure dust and mixed smoke-dust plumes inferred from inversion of multiwavelength Raman/polarization lidar data and comparison to AERONET retrievals and in situ observations
(2013-05-10)We present for the first time vertical profiles of microphysical properties of pure mineral dust (largely unaffected by any other aerosol types) on the basis of the inversion of optical data collected with multiwavelength ... -
Vertical profiling of convective dust plumes in southern Morocco during SAMUM
(2009-02)Lifting of dust particles by dust devils and convective plumes may significantly contribute to the global mineral dust budget. During the Saharan Mineral Dust Experiment (SAMUM) in May-June 2006 vertical profiling of dusty ... -
Vertical profiling of optical and physical particle properties over the tropical Indian Ocean with six-wavelength lidar 1. Seasonal cycle
(2001-11-27)For the first time the seasonal cycle of optical and physical particle properties over the Indian Ocean was observed with a six-wavelength aerosol lidar. The measurements were performed in the framework of the Indian Ocean ... -
Vertical profiling of optical and physical particle properties over the tropical Indian Ocean with six-wavelength lidar 2. Case studies
(2001-11-27)We present the seasonal cycle of optical and physical particle properties over the Indian Ocean based on case studies of six-wavelength aerosol lidar observations performed in the framework of the Indian Ocean Experiment. ... -
Vertical profiling of Saharan dust with Raman lidars and airborne HSRL in southern Morocco during SAMUM
(2009-02)Three ground-based Raman lidars and an airborne high-spectral-resolution lidar (HSRL) were operated during SAMUM 2006 in southern Morocco to measure height profiles of the volume extinction coefficient, the extinction-to ... -
Vertical profiling of the Indian aerosol plume with six-wavelength lidar during INDOEX : A first case study
(2000-04-01)During the Intensive Field Phase (IFP) of the Indian Ocean Experiment (INDOEX) lasting from 15 February to 26 March 1999, a large number of pollution outbreaks from India and southeast Asia were observed with a unique ... -
Vertical Resolved Dust Mass Concentration and Backscatter Coefficient Retrieval of Asian Dust Plume Using Quartz Raman Channel in Lidar Measurements
(Les Ulis: EDP Sciences, 2016-06-07)In this work, we present a method for estimating vertical resolved mass concentration of dust immersed in Asian dust plume using Raman scattering of quartz (silicon dioxide, silica). During the Asian dust period of March ... -
Vertical Resolved Dust Mass Concentration and Backscatter Coefficient Retrieval of Asian Dust Plume Using Quartz Raman Channel in Lidar Measurements
(EDP Sciences, 2016-06-07)In this work, we present a method for estimating vertical resolved mass concentration of dust immersed in Asian dust plume using Raman scattering of quartz (silicon dioxide, silica). During the Asian dust period of March ... -
Vertical structure of biomass burning aerosol transported over the southeast Atlantic Ocean
(2022-08-03)Biomass burning in southwestern Africa produces smoke plumes that are transported over the Atlantic Ocean and overlie vast regions of stratocumulus clouds. This aerosol layer contributes to direct and indirect radiative ... -
Vertical variation of optical properties of mixed Asian dust/pollution plumes according to pathway of air mass transport over East Asia
(2015-06-17)We use five years (2009-2013) of multiwavelength Raman lidar measurements at Gwangju, South Korea (35.10° N, 126.53° E) for the identification of changes of optical properties of East Asian dust depending on its transport ... -
Vertical Variation of Optical Properties of Mixed Asian Dust/Pollution Plumes According to Pathway of Airmass Transport over East Asia
(2016-06-07)We use five years (2009-2013) of multiwavelength Raman lidar measurements at Gwangju, Korea (35.10N, 126.53E) for the identification of changes of optical properties of East Asian dust in dependence of its transport path ... -
Vertical Z
(University of Hertfordshire, 1991)In this paper, lessons learned about decomposition in programming are used as the basis for the organisation of a Z specification. The example used is drawn from an information system which manages security for a large ... -
Vertically resolved dust optical properties during SAMUM : Tinfou compared to Ouarzazate
(2009-02-02)Vertical profiles of dust key optical properties are presented from measurements during the Saharan Mineral Dust Experiment (SAMUM) by Raman and depolarization lidar at two ground-based sites and by airborne high spectral ...