Browsing University of Hertfordshire by Title
Now showing items 16124-16143 of 24471
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Optical and near-infrared spectropolarimetry of the infrared-luminous galaxy IRAS 23060+0505
(1996)We present optical and near-IR spectropolarimetry of the type 2 infrared-luminous galaxy IRAS 23060+0505, which clearly shows both broad Hα and Paalpha in polarized flux. The full widths at half maximum (FWHM) of these ... -
An optical and near-infrared study of the AM Herculis-type binary CW 1103+254
(1985)All main components of the AM Herculis-type binary CW 1103 + 254 can be distinguished by means of observations encompassing optical and near-IR photometry and polarimetry, together with optical spectroscopy and spectropolarimetry. ... -
Optical and NIR investigation of a sample of tidal dwarf candidates
(2003)We analyzed a sample of 44 candidates for Tidal Dwarf Galaxies(TDGs) previously selected on optical imaging with low resolution spectroscopy. Most of the TDG candidates have the same redshift as the interacting system, 3 ... -
Optical and physical characterization of European and Indo-Asian pollution plumes with six-wavelength aerosol lidar
(Institute of Electrical and Electronics Engineers (IEEE), 2001)Optical and physical particle properties of two typical pollution plumes emitted from the European continent during the Aerosol Characterization Experiment ACE 2, and from the Indo-Asian continent during INDOEX are ... -
Optical and Wireless Convergence : Paper AW2A.5
(Optical Society of America (OSA), 2012)This paper presents the requirements and possible solutions for wireless convergence in next generation PONs. System level simulation of LTE was performed to evaluate two different approaches for connecting eNBs to ONUs -
Optical Cartography of the Northern Galactic Plane
(2016-06-28)Counting stars as a means of studying the structure of the Milky Way has a long history, which has progressed significantly with the undertaking of large-area surveys. Photographic surveys have been supplanted with the ... -
Optical characterization of Diesel and water emulsion fuel injection sprays using shadowgraphy
(2016-08-31)Diesel fuel and water emulsions have been shown to reduce emissions of NOx and PM from compression ignition engines. There is a lack of work examining the influence of emulsification on the sprays formed during injection. ... -
Optical Communication : Optimising negative chirp of an electroabsorption modulator for use in high-speed optical networks
(2007)Optical networks using singlemode fiber rely on negative chirp to improve the transmission performance. In particular for an electroabsorption modulator (EAM) optimal chirp control is required when it is used to achieve ... -
Optical detection of the Pictor A jet and tidal tail : evidence against an IC/CMB jet
(2015-07-20)New images of the FR II radio galaxy Pictor A from the Hubble Space Telescope reveal a previously undiscovered tidal tail, as well as a number of jet knots coinciding with a known X-ray and radio jet. The tidal tail is ... -
Optical Digital Galactic Plane Surveys and Star-Cluster Science
(Springer Nature, 2012)Over the next few years, the optical surveys IPHAS, UVEX and VPHAS+ will provide complete photometric coverage of the Galactic Plane within the latitude range -5 degrees <b <+5 degrees. Of these surveys, IPHAS is the most ... -
Optical Fiber Communications : Principles and Practice
(Pearson Education, 2009) -
An optical inverse-Compton hotspot in 3c 196?
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Optical lenses for atomic beams
(2009)Superpositions of paraxial laser beam modes to generate atom-optical lenses based on the optical dipole force are investigated theoretically. Thin, wide, parabolic, cylindrical, and circular atom lenses with numerical ... -
Optical Measurement of Airborne Particles on Unmanned Aircraft
(2023-09-30)Aerosols and clouds are persistent causes of uncertainty in climate and weather models, which is due to their heterogeneous suspension and occurrence within the atmosphere, and complex interactions which are chaotic and ... -
Optical photometric GTC/OSIRIS observations of the young massive association Cygnus OB2
(2012-10-01)In order to fully understand the gravitational collapse of molecular clouds, the star formation process, and the evolution of circumstellar disks, these phenomena must be studied in different Galactic environments with a ... -
Optical properties of aerosol mixtures derived from sun-sky radiometry during SAMUM-2
(2011-09)The SAMUM-2 experiment took place in the Cape Verde islands in January-February 2008. The colocated ground-based and airborne instruments allow the study of desert dust optical and microphysical properties in a closure ... -
Optical properties of the Indo-Asian haze layer over the tropical Indian Ocean
(2003-01)[1] Multiwavelength backscatter and extinction profiling was performed with a unique aerosol Raman lidar at Hulhule (4degreesN, 73degreesE), Maldives, as part of the Indian Ocean Experiment (INDOEX) between February 1999 ...