3,776 research outputs found
Malarial Therapy in General Paralysis
In the course of this thesis it is intended to study carefully the after-history of patients treated by malarial inoculation for General Paralysis since the introduction of this method of treatment into this country at Whittingham County Mental Hospital in July, 1922. Since 1924 I have had the opportunity of coming into direct contact with almost all the cases recorded; and, further, a large proportion of the cases have received trea
Genetically Modified Organisms, India\u27s Farmer Suicide Event, and Environmental Discourse: Rhetorical Situations, Frames, and Ideographs in the Debate on Genetically Modified Organisms
Neutral organoantimony(III) and organobismuth(III) ligands as acceptors in transition metal complexes â role of substituents and co-ligands
This article reviews work up until mid-2014 on the synthesis and properties of transition metal complexes containing the heavier Group 15 Sb(III) and Bi(III) ligands, of general formula ER3 (E = Sb or Bi; R = alkyl, aryl etc, and may include a pendant donor group such as amine or ether) and ER(3-n)Xn (E = Sb or Bi; R is an organic substituent such as alkyl, aryl, etc.; X is an electronegative substituent such as halide; n = 0-3) in which these ligands function as a donor to a transition metal fragment, while simultaneously participating as an acceptor to another electronegative group such as an anionic or metal-coordinated halide, or an amine, ether, etc., leading to Sb/Bi centres bearing more than eight valence electrons ('hypervalent'). The Lewis acid properties of the halostibines and halobismuthines, ER(3-n)Xn, are also reviewed
An optical investigation of cavitation phenomena in true-scale high-pressure diesel fuel injector nozzles
Efforts to improve diesel fuel sprays have led to a significant increase in fuel injection pressures and a reduction in nozzle-hole diameters. Under these conditions, the likelihood for the internal nozzle flow to cavitate is increased, which potentially affects spray breakup and atomisation, but also increases the risk of causing cavitation damage to the injector.
This thesis describes the study of cavitating flow phenomena in various single and multi-hole optical nozzle geometries. It includes the design and development of a high-pressure optical fuel injector test facility with which the cavitating flows were observed. Experiments were undertaken using real-scale optical diesel injector nozzles at fuel injection pressures up to 2050 bar, observing for the first time the characteristics of the internal nozzle-flow under realistic fuel injection conditions.
High-speed video and high resolution photography, using laser illumination sources, were used to capture the cavitating flow in the nozzle-holes and sac volume of the optical nozzles, which contained holes ranging in size from 110 micrometers to 300 micrometers. Geometric cavitation in the nozzle-holes and string cavitation formation in the nozzle-holes and sac volume were both observed using transient and steady-state injection conditions; injecting into gaseous and liquid back pressures up to 150 bar.
Results obtained have shown that cavitation strings observed at realistic fuel injection pressures exhibit the same physical characteristics as those observed at lower pressures. The formation of string cavitation was observed in the 300 micrometers multi-hole nozzle geometries, exhibiting a mutual dependence on nozzle flow-rate and the geometry of the nozzle-holes. Pressure changes, caused by localised turbulent perturbations in the sac volume and transient fuel injection characteristics, independently affected the geometric and string cavitation formation in each of the holes.
String cavitation formation was shown to occur when free-stream vapour was entrained into the low pressure core of a sufficiently intense coherent vortex. Hole diameters less than or equal to 160 micrometers were found to suppress string cavitation formation, with this effect a result of the reduced nozzle flow rate and vortex intensity. Using different hole spacing geometries, it was demonstrated that the formation of cavitation strings in a particular geometry became independent of fuel injection and back pressure once a threshold pressure drop across the nozzle had been reached
The distance to a star forming region in the Outer arm of the Galaxy
We performed astrometric observations with the VLBA of WB89-437, an H2O maser
source in the Outer spiral arm of the Galaxy. We measure an annual parallax of
0.167 +/- 0.006 mas, corresponding to a heliocentric distance of 6.0 +/- 0.2
kpc or a Galactocentric distance of 13.4 +/- 0.2 kpc. This value for the
heliocentric distance is considerably smaller than the kinematic distance of
8.6 kpc. This confirms the presence of a faint Outer arm toward l = 135
degrees. We also measured the full space motion of the object and find a large
peculiar motion of ~20 km/s toward the Galactic center. This peculiar motion
explains the large error in the kinematic distance estimate. We also find that
WB89-437 has the same rotation speed as the LSR, providing more evidence for a
flat rotation curve and thus the presence of dark matter in the outer Galaxy.Comment: The Astrophysical Journal, accepted, 16 pages, 4 Figure
Risky facilities: analysis of crime concentration in high-rise buildings
This paper investigates the security of high rise high density accommodation at the Gold Coast â a premier Australian holiday destination. Surfers Paradise has one of the highest population densities in Australia at 3,279 persons per square kilometre and over 70 percent of the residential population live in buildings classed as high density within a mix of tourist apartments and units. The paper explores how the levels of place management and guardianship relate to the volume and mix of crimes occurring in high-rise apartment buildings.
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Foreword: Current town planning and housing policies suggest that in the very near future, housing density in major Australian cities will be much higher than current levels. To date, little attention has been paid to how these policy shifts will impact levels of crime and fear of crime. The aim of this research is to contribute to the development of strategic policy for the secure management of high-density housing. By analysing actual rates and types of crime, guardianship levels, building management styles and perceptions of fear of crime, the research will reveal how planning policies and high-rise building management styles can coalesce to create safer vertical communities. The research focuses on high-rise apartments and touristic buildings on the Gold Coast (specifically Surfers Paradise) and identifies the disproportionate concentration of crimes among a handful of buildings. Results may help state and local governments in Australia to avoid repeating the housing policy mistakes experienced by other countries
Bromostibine complexes of iron(II): hypervalency and reactivity
The halostibine complexes [CpFe(CO)2(SbMe2Br)][CF3SO3] and [CpFe(CO)2(SbMe2Br)][BF4] both contain significant interactions between the anion and the formally neutral Sb(III) ligand, which simultaneously displays Lewis acidic and Lewis basic properties. The unexpected secondary product [CpFe(CO)(Me2BrSb-?-Br-SbBrMe2)] is formed in the presence of excess ligand, the strongly associated Brâ anion bridging the two Sb donors to form a four-membered FeSb2Br ring.<br/
FUSE, STIS, and Keck spectroscopic analysis of the UV-bright star vZ 1128 in M3 (NGC 5272)
We present a spectral analysis of the UV-bright star vZ 1128 in M3 based on
observations with the Far Ultraviolet Spectroscopic Explorer (FUSE), the Space
Telescope Imaging Spectrograph (STIS), and the Keck HIRES echelle spectrograph.
By fitting the H I, He I, and He II lines in the Keck spectrum with non-LTE
H-He models, we obtain Teff = 36,600 K, log g = 3.95, and log N(He)/N(H) =
-0.84. The star's FUSE and STIS spectra show photospheric absorption from C, N,
O, Al, Si, P, S, Fe, and Ni. No stellar features from elements beyond the iron
peak are observed. Both components of the N V 1240 doublet exhibit P~Cygni
profiles, indicating a weak stellar wind, but no other wind features are seen.
The star's photospheric abundances appear to have changed little since it left
the red giant branch (RGB). Its C, N, O, Al, Si, Fe, and Ni abundances are
consistent with published values for the red-giant stars in M3, and the
relative abundances of C, N, and O follow the trends seen on the cluster RGB.
In particular, its low C abundance suggests that the star left the asymptotic
giant branch before the onset of third dredge-up.Comment: 15 pages, 10 figures, to be published in MNRA
Where is the competitive edge in Knowledge Transfer?: the impact of KTPs
The need for technology transfer from universities to industry is a theme that resonates throughout many advanced countries of the world. This paper explores the effectiveness and efficiency of Business and Management schools in transferring technology through formal Knowledge Transfer schemes; it examines the value and impact of these activities by reporting on the outputs from thirteen major case studies across two sectors, manufacturing and healthcare. The paper assesses the impact of knowledge transfer, in relation to the development of a competitive edge and proposes some initial frameworks for potential application and use
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