Browsing University of Hertfordshire by Title
Now showing items 23354-23373 of 24319
-
Variations in the broad-band spectra of BL Lac objects: millimetre observations of an X-ray-selected sample
(1999)Observations at millimetre wavelengths are presented for a representative sample of 22 X-ray-selected BL Lac objects (XBLs). This sample comprises 19 High-energy cutoff BL Lacs objects (HBLs), 1 Low-energy cutoff BL Lac ... -
Variations in the Star Formation Efficiency of the Dense Molecular Gas across the Disks of Star-Forming Galaxies
(2015-10)We present a new survey of HCN(1-0) emission, a tracer of dense molecular gas, focused on the little-explored regime of normal star-forming galaxy disks. Combining HCN, CO, and infrared (IR) emission, we investigate the ... -
Variations of the spectral index of dust emissivity from Hi-GAL observations of the Galactic plane
(2010)Context. Variations in the dust emissivity are critical for gas mass determinations derived from far-infrared observations, but also for separating dust foreground emission from the Cosmic Microwave Background (CMB). Hi-GAL ... -
Variegated financialisation and pension fund asset demand: the case of Colombia and Peru
(2021-04-01)This article seeks to explain concretely how one ‘variegation’ of financialization in the emerging economy setting is being shaped by the growth of domestic pension funds. Taking Colombia and Perú as case studies, we explore ... -
Varieties of Capitalism : Some Philosophical and Historical Considerations
(2016-05-01)The literature on varieties of capitalism has stimulated some authors to challenge notions of ‘essentialism’ and even the concept of capitalism itself. In this essay it is argued that the existence of varieties of capitalism ... -
Vascular Calcification in Rat Cultured Smooth Muscle Cells: a Role for Nitric Oxide
(2016-07-07)The underlying inflammatory storm in renal or diabetic disease may induce expression of inducible nitric oxide synthase (iNOS). Similarly, expression of iNOS or nitric oxide (NO) production in vascular smooth muscle cells ... -
Vascular Calcification Mechanisms: Updates and Renewed Insight into Signaling Pathways Involved in High Phosphate-Mediated Vascular Smooth Muscle Cell Calcification
(2021-07-12)Vascular calcification (VC) is associated with aging, cardiovascular and renal diseases and results in poor morbidity and increased mortality. VC occurs in patients with chronic kidney disease (CKD), a condition that is ... -
Veblen and Darwinism
(2004)The aim of this article is to show how Thorstein Veblen understood and applied Darwinian principles to his analysis of the evolution of socio-economic institutions. At the core of Darwinism is a commitment to causal ... -
Vegetation damage during an episode of selenium pollution
(1981)Necrotic lesions were observed on the leaves of trees and herbaceous species in the vicinity of a copper refinery. Analysis of leaf samples revealed the presence of excessive concentrations of selenium and copper. The ... -
Vehicle Detection for Traffic Flow Analysis
(Institute of Electrical and Electronics Engineers (IEEE), 2017-01-16)This paper looks at some of the algorithms that can be used for effective detection and tracking of vehicles, in particular for statistical analysis. The main methods for tracking discussed and implemented are blob analysis, ... -
The Veneziano amplitude in AdS 5 × S 3 from an 8-dimensional effective action
(2023-08-03)We study four-point functions of arbitrary half-BPS operators in a 4-dimensional N = 2 SCFT with flavour group SO(8) at genus-zero and strong ’t Hooft coupling, corresponding — via AdS/CFT — to the (α′ expansion of the) ... -
Venlafaxine as the ‘baby ecstasy’? : Literature overview and analysis of web-based misusers’ experiences
(2015-07-28)Introduction :Venlafaxine is one of the most frequently prescribed antidepressants worldwide, despite its toxicity risk in overdose. Furthermore, the molecule has been recently identified at the EU-wide level as one of the ... -
The Venus ground-based image Active Archive : A database of amateur observations of Venus in ultraviolet and infrared light
(2008-08-01)The Venus ground-based image Active Archive is an online database designed to collect ground-based images of Venus in such a way that they are optimally useful for science. The Archive was built to support ESA's Venus ... -
Verbal Reports and "Real' Reasons" : Confabulation and Conflation
(2015-04-01)This paper examines the relation between the various forces which underlie human action and verbal reports about our reasons for acting as we did. I maintain that much of the psychological literature on confabulations rests ... -
Verbalization and problem solving: insight and spatial factors
(2010)Two groups of participants attempted eight examples of each of four different problem types formed by combining insight v. non-insight and verbal v. spatial factors. The groups were given different verbalization instructions ... -
Verification and Validation of a Low-Mach-Number Large-Eddy Simulation Code against Manufactured Solutions and Experimental Results
(2018-04-13)To investigate turbulent reacting flows, a low-Mach number large-eddy simulation (LES) code called ‘LESsCoal’ has been developed in our group. This code employs the Germano dynamic sub-grid scale (SGS) model and the steady ... -
The Verification of Identity in Online Tests: A Comparison of Methods
(Loughborough University, 2007) -
The verification of periodicity with the use of recurrent neural networks
(2024-04-23)The ability to automatically and robustly self-verify periodicity present in time-series astronomical data is becoming more important as data sets rapidly increase in size. The age of large astronomical surveys has rendered ...