Browsing University of Hertfordshire by Title
Now showing items 5457-5476 of 24081
-
Direct Evidence for Termination of Obscured Star Formation by Relatively Driven Outflows in Reddened QSOs
(2012-02)We present optical to far-infrared photometry of 31 reddened QSOs that show evidence for radiatively driven outflows originating from active galactic nuclei (AGNs) in their rest-frame UV spectra. We use these data to study ... -
Direct imaging of long period radial velocity targets with NICI
(2013-06-30)We are finally entering an era where radial velocity and direct imaging parameter spaces are starting to overlap. Radial velocity measurements provide us with a minimum mass for an orbiting companion (the mass as a function ... -
Direct involvement, partnership and setting: a study in bounded diversity
(2013-04-03)This paper brings a comparative aspect to the analysis of direct involvement as the foundation for partnership. It considers how various forms of direct involvement can represent components of a broader partnership paradigm ... -
Direct Ionization of Solid-Phase Microextraction Fibers for Quantitative Drug Bionalysis : From Peripheral Circulation to Mass Spectrometry Detection
(2015-01-06)A novel approach is described for the quantitative bioanalysis of drugs in blood samples by ionization of the analytes collected on solid-phase microextraction (SPME) fibers by mass spectrometry (MS). The technique combines ... -
Direct measurement of gain recovery in a saturated Nd-glass amplifier
(1978)The temporal dependence of the gain recovery in a Nd-silicate glass amplifier has been directly observed after the passage of a short intense saturating laser pulse. The gain recovery time constant measured for ED-2 glass ... -
A Direct Measurement of the Linear Bias of Mid-infrared-selected Quasars at z ap 1 Using Cosmic Microwave Background Lensing
(2013-10-20)We measure the cross-power spectrum of the projected mass density as traced by the convergence of the cosmic microwave background lensing field from the South Pole Telescope (SPT) and a sample of Type 1 and 2 (unobscured ... -
Direct measurements of carbon and sulfur isotope ratios in the Milky Way
(2023-02-14)With the IRAM 30-m telescope, we performed observations of the $J$ = 2-1 transitions of CS, C$^{33}$S, C$^{34}$S, C$^{36}$S, $^{13}$CS, $^{13}$C$^{33}$S, and $^{13}$C$^{34}$S as well as the $J$ = 3-2 transitions of C$^{33}$S, ... -
Direct metabolic fingerprinting of commercial herbal tinctures by nuclear magnetic resonance spectroscopy and mass spectrometry
(2009)Tinctures are widely used liquid pharmaceutical preparations traditionally obtained by maceration of one or more medicinal plants in ethanol-water solutions. Such a process results in the extraction of virtually hundreds ... -
Direct neutron capture cross sections of Ni-62 in the s-process energy range
(2002-08)Direct neutron capture on Ni-62 is calculated in the DWBA and the Maxwellian averaged cross sections and astrophysical reaction rates in the energy range relevant for s-process nucleosynthesis are given. It is confirmed ... -
Direct neutron capture for magic-shell nuclei
(1996-01)In neutron capture for magic-shell nuclei the direct reaction mechanism can be important and may even dominate. As an example we investigated the reaction Ca-48(n, gamma)Ca-49 for projectile energies below 250 keV in a ... -
Direct NMR analysis of cannabis water extracts and tinctures and semi-quantitative data on delta9-THC and delta9-THC-acid
(2008-01)Cannabis sativa L. is the source for a whole series of chemically diverse bioactive compounds that are currently under intensive pharmaceutical investigation. In this work, hot and cold water extracts as well as ethanol/water ... -
Direct perception in the intersubjective context
(2008)This paper, in opposition to the standard theories of social cognition found in psychology and cognitive science, defends the idea that direct perception plays an important role in social cognition. The two dominant theories, ... -
Direct sequencing of PCR products with DNA-binding proteins
(Humana Press, 1996) -
Direct somatic embryogenesis and plant regeneration from mature sugarbeet (Beta vulgaris L.) zygotic cotyledons
(1997)An in vitro protocol has been developed for direct somatic embryogenesis of zygotic cotyledons from mature sugarbeet (Beta vulgaris L.) embryos. Explants were sequentially cultured on modified Murashige and Skoog (MS) ... -
Direct torque control of multilevel SVPWM inverter in variable speed SCIG-based wind energy conversion system
(2015-08-01)Direct torque control (DTC) theory has been successfully used in a variety of high performance industrial AC drives. This paper presents the application of DTC space vector modulation (DTC-SVM) to two and three level voltage ... -
Direct Yaw-Moment Control Evaluation of an In-Wheel-Motored Electric Vehicle Based on Body Slip Angle Fuzzy Observer
(2009-05)A stabilizing observer-based control algorithm for an in-wheel-motored vehicle is proposed, which generates direct yaw moment to compensate for the state deviations. The control scheme is based on a fuzzy rule-based body ... -
Directed Acyclic Graphs
(2015-12-16)This source code implements a unified framework for pre-processing Directed Acyclic Graphs (DAGs) to lookup reachability between two vertices as well as compute the least upper bound of two vertices in constant time. Our ... -
Directing the students’ mind games : A game theoretical view of the learning process
(2014-03)Experimental data consistently shows that the students’ beliefs about their own academic ability have a significant effect on their performance and their level of engagement. The aim of this paper is to offer an original ... -
The Direction of Union Mergers in the United States : The Rise of Conglomerate Unionism
(2009-12)Trade union mergers have become common throughout the industrial world. In the United States, since the late 1970s, these have become increasingly multi-jurisdictional. Beginning in the 1990s, the trend has been dominated ...