685,680 research outputs found
Insights from computational modelling and simulation towards promoting public health among African countries
One of the problems associated with some African countries is the increasing trend of
road mortality as a result of road fatalities. This has been a major concern. The negative
impacts of these on public health cannot be underestimated. An issue of concern is the
high record of casualties being recorded on an annual basis as a result of over-speeding,
overtaking at dangerous bends, alcohol influence and non-chalant attitude of drivers to
driving. The aim of this research is to explore and adapt the knowledge of finite state
algorithm, modeling and simulation to design and implement a novel prototype of an
advanced traffic light system towards promoting public health among African countries.
Here, we specify and built a model of an advanced wireless traffic control system, which
will help complement existing traffic control systems among African countries. This
prototype is named Advanced Wireless Traffic Control System (WPDTCS). We developed
this model using an event-driven programming approach. The technical details of the
model were based on knowledge adapted from the Finite State Automation Transition
algorithm. It is expected that the AWTCS will promote the evolution of teaching in
modeling, simulation, public safety by offering trainees an advanced pedagogical
product. It will also permit to strengthen the collaboration of knowledge from the fields
of Computer Science, Public health, and Electrical Engineering.
Keywords: public health, public safety, modelling , simulation, pr
A General Solution of the BV-Master Equation and BRST Field Theories
For a class of first order gauge theories it was shown that the proper
solution of the BV-master equation can be obtained straightforwardly. Here we
present the general condition which the gauge generators should satisfy to
conclude that this construction is relevant. The general procedure is
illustrated by its application to the Chern-Simons theory in any odd-dimension.
Moreover, it is shown that this formalism is also applicable to BRST field
theories, when one replaces the role of the exterior derivative with the BRST
charge of first quantization.Comment: 11 pages, Plain Latex (latex twice), IC/93/9
A General Solution of the Master Equation for a Class of First Order Systems
Inspired by the formulation of the Batalin-Vilkovisky method of quantization
in terms of ``odd time'', we show that for a class of gauge theories which are
first order in the derivatives, the kinetic term is bilinear in the fields, and
the interaction part satisfies some properties, it is possible to give the
solution of the master equation in a very simple way. To clarify the general
procedure we discuss its application to Yang-Mills theory, massive (abelian)
theory in the Stueckelberg formalism, relativistic particle and to the
self-interacting antisymmetric tensor field.Comment: 11 pages, IC/92/42
Determinants of Commercial Banks’ Lending Behavior in Nigeria
This study investigated the determinants of commercial banks’ lending behaviour in the Nigerian context. The study
aimed to test and confirm the effectiveness of the common determinants of commercial banks lending behaviour and how it affects the lending behaviour of commercial banks in Nigeria. The model used is estimated using Nigerian commercial banks loan advance (LOA) and other determinants or variables such as their volume of deposits (Vd), their
investment portfolio (Ip), interest (lending) rate (Ir), stipulated cash reserve requirements ratio (Rr) and their liquidity ratio (Lr) for the period; 1980 – 2005. The model hypothesizes that there is functional relationship between the dependent variable and the specified independent variables. From the regression analysis, the model was found to be significant and its estimators turned out as expected and it was discovered that commercial banks deposits have the greatest impacts on their lending behaviour. The study then suggests that commercial banks should focus on mobilizing more deposits as this will enhance their lending performance and should formulate critical, realistic and comprehensive strategic and financial plans
Residual-strength tests of L-1011 vertical fin components after 10 and 20 years of simulated flight service
Part of the NASA/ACEE Program was to determine the effect of long-term durability testing on the residual strength of graphite-epoxy cover panel and spar components of the Lockheed L-1011 aircraft vertical stabilizer. The results of these residual strength tests are presented herein. The structural behavior and failure mode of both cover panel and spar components were addressed, and the test results obtained were compared with the static test results generated by Lockheed. The effect of damage on one of the spar specimens was described
New motor shaft angular accelerometer concept
Concept permits measurement of the acceleration of continuously rotating shafts without use of slip rings or telemetry and with little additional inertial load. Concept has application in servomotor control circuits and easy-to-fly airplane controls
BV and BFV Formulation of a Gauge Theory of Quadratic Lie Algebras in 2-d and a Construction of W3 Topological Gravity
The recently proposed generalized field method for solving the master
equation of Batalin and Vilkovisky is applied to a gauge theory of quadratic
Lie algebras in 2-dimensions. The charge corresponding to BRST symmetry derived
from this solution in terms of the phase space variables by using the Noether
procedure, and the one found due to the BFV-method are compared and found to
coincide. algebra, formulated in terms of a continuous variable is
emploied in the mentioned gauge theory to construct a topological
gravity. Moreover, its gauge fixing is briefly discussed.Comment: 12 pages, Plain Latex (latex twice
Consistent Interactions in terms of the Generalized Fields Method
The interactions which preserve the structure of the gauge interactions of
the free theory are introduced in terms of the generalized fields method of
solving the Batalin-Vilkovisky master equation. It is shown that by virtue of
this method the solution of the descent equations resulting from the
cohomological analysis is provided straightforwardly. The general scheme is
illustrated by applying it to spin-1 gauge field in 3 and 4 dimensions, to free
BF theory in 2-d and to the antisymmetric tensor field in any dimension. It is
shown that it reproduces the results obtained by cohomological techniques.Comment: to appear in IJMPA, extended and some refs. adde
Satellite height determination using satellite-to-satellite tracking and ground laser systems
An attempt was made to use GEOS-C spacecraft height, as measured by the onboard radar altimeter, for an improved determination of the earth's gravitational field and for the determination of the variation of the physical surface of the oceans. Two tracking system approaches to accurately determine the spacecraft height (orbit) are described and their results stated. These are satellite-to-satellite tracking (SST) and ground-laser tracking (GLT). Height variations can be observed in the dm-regions using SST and in the m-region using present GLT
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