30,210 research outputs found
The examination of blood films in relation to the prevention of plumbism among shipbreakers
The control of the lead risk among shipbreakers
presents problems of great practical
difficulty. Measures for the prevention of plumbism
applied successfully in other industries are here impracticable,
with the result that the breaking-up of
a heavily leaded ship is almost invariably responsible
for a considerable crop of gross cases of lead poisoning
and a large mass of ill-health stopping just short of
incapacity for work
InSPeCT: Integrated Surveillance for Port Container Traffic
This paper describes a fully-operational content-indexing and management system, designed for monitoring and profiling freight-based vehicular traffic in a seaport environment. The 'InSPeCT' system captures video footage of passing vehicles and uses tailored OCR to index the footage according to vehicle license plates and freight codes. In addition to real-time functionality such as alerting, the system provides advanced search techniques for the efficient retrieval of records, where each vehicle is profiled according to multi-angled video, context information, and links to external information sources. Currently being piloted at a busy national seaport, the feedback from port officials indicates the system to be extremely useful in supplementing their existing transportation-security structures
The Behavior of Soluble Salt in Sharkey Clay
Soluble salt problems do exist and are significant in Arkansas. Studies have been conducted on Crowley silt loam (Typic Albaqualfs) which have established the behavior of soluble salt in that soil. The major objective of this study was to quantify the behavior of soluble salt in a second important Mississippi River Delta soil - the Sharkey (Vertic Haplaquepts). To this end, estimation of the downward redistribution of salt and the estimation of various components of the water balance for this soil served as specific objectives. Field studies were designed to monitor the movement of salt in the Sharkey soil and to characterize selected components of the water balance. In total, three tentative conclusions may be drawn from the data. First, the infiltration for the Sharkey soil was approximately three times that of the Crowley silt loam. The average value was 29 cm for the rice season. Second, levee seepage, while significant for small plots, was shown to be small for production-sized fields. Levee seepage remained relatively constant throughout the season and averaged 0.025 nvfym/d. And third, downward redistribution of salt was large and appeared to follow a pattern where a peak occurred at the surface and, possibly, at the lower soil depths
Microsecond resolution of quasiparticle tunneling in the single-Cooper-pair-transistor
We present radio-frequency measurements on a single-Cooper-pair-transistor in
which individual quasiparticle poisoning events were observed with microsecond
temporal resolution. Thermal activation of the quasiparticle dynamics is
investigated, and consequently, we are able to determine energetics of the
poisoning and un-poisoning processes. In particular, we are able to assign an
effective quasiparticle temperature to parameterize the poisoning rate.Comment: 4 pages, 4 fig
Australian audit reports: 1996-2003
In 1996 Australia revised audit reporting standard AUS 702 to align with many of the concepts in the international audit reporting standard ISA 700. These included preventing auditors issuing a âsubject toâ qualified opinion, and permitting auditors to modify the audit report in specific circumstances by including an emphasis of matter (EoM) paragraph. This research examines the frequency with which different types of opinions are issued and the circumstances giving rise to the inclusion of an EoM paragraph, and compares the types of opinions issued by the major audit firms and for the various industry sectors over the period 1996-2003. © 2006 CPA Australia
Laser Velocimeter Measurements in the Leakage Annulus of a Whirling Shrouded Centrifugal Pump
Previous experiments conducted in the Rotor Force Test Facility at the California Institute of Technology have thoroughly examined the effect of leakage flows on the rotordynamic forces on a centrifugal pump impeller undergoing a prescribed circular whirl. These leakage flows have been shown to contribute substantially to the total fluid induced forces acting on a pump. However, to date nothing is known of the flow field in the leakage annulus of shrouded centrifugal pumps. No attempt has been made to qualitatively or quantitatively examine the velocity field in the leakage annulus. Hence the test objective of this experiment is to acquire fluid velocity data for a geometry representative of the leakage annulus of a shrouded centrifugal pump while the rotor is whirling using laser velocimetry. Tests are performed over a range of whirl ratios and a flowrate typical of Space Shuttle Turbopump designs. In addition to a qualitive study of the flow field, the velocity data can be used to anchor flow models
Polyion Detection via Allâsolidâcontact Paperâbased Polyionâsensitive Polymeric Membrane Electrodes
The first allâsolidâcontact paperâbased singleâuse polyionâsensitive ionâselective electrodes (ISEs) are described. These polyionâsensitive ISEs are fabricated using cellulose filter paper coated with a carbon ink conductive layer. A polyanion sensing membrane is cast on a section of the coated paper and the sensor is insulated, resulting in a disposable, singleâuse device. Various polyanions are shown to yield large negative potentiometric responses when using these disposable devices for direct polyanion detection. These new sensors are further demonstrated to be useful in indirect polycation detection when polycations (i.âe., polyquaterniums (PQs)) are titrated with polyanionic dextran sulfate (DS). Titrations monitored using these paperâbased, allâsolidâcontact devices yield endpoints proportional to the given PQ concentration present in the test sample.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/151253/1/elan201900155.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/151253/2/elan201900155_am.pd
Tidal Remnants and Intergalactic HII Regions
We report the discovery of two small intergalactic HII regions in the loose
group of galaxies around the field elliptical NGC 1490. The HII regions are
located at least 100 kpc from any optical galaxy but are associated with a
number of large HI clouds that are lying along an arc 500 kpc in length and
that have no optical counterpart on the Digital Sky Survey. The sum of the HI
masses of the clouds is almost 10^10 M_sun and the largest HI cloud is about
100 kpc in size. Deep optical imaging reveals a very low surface brightness
counterpart to this largest HI cloud, making this one of the HI richest optical
galaxies known (M_HI/L_V~200). Spectroscopy of the HII regions indicates that
the abundance in these HII regions is only slightly sub-solar, excluding a
primordial origin of the HI clouds. The HI clouds are perhaps remnants
resulting from the tidal disruption of a reasonably sized galaxy, probably
quite some time ago, by the loose group to which NGC1490 belongs.
Alternatively, they are remnants of the merger that created the field
elliptical NGC1490. The isolated HII regions show that star formation on a very
small scale can occur in intergalactic space in gas drawn from galaxies by
tidal interactions. Many such intergalactic small star formation regions may
exist near tidally interacting galaxies.Comment: To appear in the proceedings of the IAU Symposium #217, Recycling
Intergalactic and Interstellar Matter, eds. P.-A. Duc, J. Braine, and E.
Brinks, 6 pages with low resolution figures. The full paper with high
resolution images can be downloaded from
http://www.astron.nl/~morganti/Papers/cloud.ps.g
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