300,802 research outputs found
Uranium isotopes quantitatively determined by modified method of atomic absorption spectrophotometry
Hollow-cathode discharge tubes determine the quantities of uranium isotopes in a sample by using atomic absorption spectrophotometry. Dissociation of the uranium atoms allows a large number of ground state atoms to be produced, absorbing the incident radiation that is different for the two major isotopes
Forward-Thinking: HR\u27s Path To Improving Its Worth
[Excerpt] Human Resources has only just begun to move past its transactional roots into a truly strategic and value-adding role. Popular television characters like Toby from NBC’s The Office have all but glamorized HR, leaving individuals with a somewhat negative perception of the Human Resources function. When you add to this the personal interactions that individuals have had in the past with small and strictly transactional HR departments, it is understandable that these negative perceptions exist. For critics and skeptics of HR, these observations constitute reality. However, this doesn’t have to be the case. This essay will explore how focusing on a more results-driven analytical approach, adapting to an evolving workforce, and increasing visibility within the organization will help HR better convey its value and continue to evolve at all levels of the company
RAPID ANALYTICAL VERIFICATION OF HANDWRITTEN ALPHANUMERIC ADDRESS FIELDS
Microsoft, Motorola, Siemens, Hitachi, IAPR, NICI, IUF
This paper presents a combination of fuzzy system and dynamic analytical model to deal with imprecise data derived from feature extraction in handwritten address images which are compared against postulated addresses for address verification. A dynamic buildingÂnumber locator is able to locate and recognise the buildingÂnumber, without knowing exactly where the buildingÂnumber starts in the candidate address line. The overall system achieved a correct sorting rate of 72.9%, 27.1% rejection rate and 0.0% error rate on a blind test set of 450 cursive handwritten addresses.
Application of holography to flow visualization
Laser holographic interferometry is being applied to many different types of aerodynamics problems. These include two and three dimensional flows in wind tunnels, ballistic ranges, rotor test chambers and turbine facilities. Density over a large field is measured and velocity, pressure, and mach number can be deduced
Implicit amenity prices and the location of retirees in England and Wales
General equilibrium models in which compensation for local amenities occurs in both housing and labour markets have been widely used to generate implicit amenity prices and regional quality of life indices. An implication and prospective test of such models is that individuals who are outside the labour market have an incentive to locate in regions where amenities are capitalised into wages. In this paper we construct a measure of the extent of amenity capitalisation into wages for each county in England and Wales. We then test the multimarket amenity model by applying this measure to county-level data on the location of retirees. Our results provide strong support for the mode
A tomographic technique for aerodynamics at transonic speeds
Computer aided tomography (CAT) provides a means of noninvasively measuring the air density distribution around an aerodynamic model. This technique is global in that a large portion of the flow field can be measured. A test of the applicability of CAT to transonic velocities was studied. A hemispherical-nose cylinder afterbody model was tested at a Mach number of 0.8 with a new laser holographic interferometer at the 2- by 2-Foot Transonic Wind Tunnel. Holograms of the flow field were taken and were reconstructed into interferograms. The fringe distribution (a measure of the local densities) was digitized for subsequent data reduction. A computer program based on the Fourier-transform technique was developed to convert the fringe distribution into three-dimensional densities around the model. Theoretical aerodynamic densities were calculated for evaluating and assessing the accuracy of the data obtained from the tomographic method
Vortex description of the fractionalized phase in exciton bose condensate
As a sequel to the previous work [Phys. Rev. B 72, 235104 (2005)] we present
a vortex description of the fractionalized phase in exciton bose condensate.
Magnetic flux line and monopole of the 3+1D emergent U(1) gauge theory are
identified in the exciton picture. A bundle of vortex/anti-vortex pairs of all
flavors of excitons corresponds to the magnetic flux line and a point at which
the vortices and anti-vortices recombine is identified as magnetic monopole.
This completes the magnetic sector of the low energy excitation in the
fractionalized phase.Comment: 8 pages, 6 figures; clarification made in introductio
Complexified Path Integrals and the Phases of Quantum Field Theory
The path integral by which quantum field theories are defined is a particular
solution of a set of functional differential equations arising from the
Schwinger action principle. In fact these equations have a multitude of
additional solutions which are described by integrals over a complexified path.
We discuss properties of the additional solutions which, although generally
disregarded, may be physical with known examples including spontaneous symmetry
breaking and theta vacua. We show that a consideration of the full set of
solutions yields a description of phase transitions in quantum field theories
which complements the usual description in terms of the accumulation of
Lee-Yang zeroes. In particular we argue that non-analyticity due to the
accumulation of Lee-Yang zeros is related to Stokes phenomena and the collapse
of the solution set in various limits including but not restricted to, the
thermodynamic limit. A precise demonstration of this relation is given in terms
of a zero dimensional model. Finally, for zero dimensional polynomial actions,
we prove that Borel resummation of perturbative expansions, with several
choices of singularity avoiding contours in the complex Borel plane, yield
inequivalent solutions of the action principle equations.Comment: 15 pages, 9 figures (newer version has better images
- …