119 research outputs found
ACETS OF INHALATIONAL MIDAZOLAM IN STATUS EPILEPTICUS
Status epilepticus (SE) is a medical emergency associated with significant morbidity and mortality. SE is defined as a continuous seizure lasting morethan 30 minutes, or two or more seizures without full recovery of consciousness between any of them. Early treatment of SE with benzodiazepines,followed if necessary by fosphenytoin administration, is the most widely followed strategy. In developing countries where facilities for assistedventilation are not readily available, it may be helpful to use inhalational midazolam in such settings. It is important to recognize SE and institutetreatment as early as possible to avoid a refractory state. It is equally important to attend to the general condition of the patient and to ensure that thepatient is hemodynamically stable.Keywords: Epilepsy, Nasal route, Midazolam, Inhalational route, Facets
TENSILE TEST ANALYSIS OF NATURAL FIBER REINFORCED COMPOSITE
This project mainly deals with analysis of tensile properties of Palmyra fiber Reinforced Epoxy Composite that is suitable for automobile application. First, the property of material was obtained on the basis of some assumptions (i.e., Rule of Mixture) and was modeled with reference to ASTM D638. Here the simulation was carried out on specimen under different fiber volume fraction and fiber length. The present work includes the Analysis of Palmyra Fiber Reinforced Epoxy Composites using FEA with various fiber volume fractions and these results were validated with the experimental result. The tensile property of Palmyra fiber composite material can be obtained by using tensometer.During the tensile load, the maximum strain, stress and displacement were obtained and, then this experimental result was compared with the analytical results and the error percentage of these results were calculated
INTEGRATED CORROSION PROTECTION SYSTEM FOR SHIP STRUCTURES
ABSTRACT Corrosion combined with fouling growth can interfere with the operation of submerged equipment, impose increased loading stresses and accelerate deterioration of marine structures, and adversely affect the performance of ships by increasing hydrodynamic drag, which necessitates the use of more power and fuel to move the ship through the water. The protection of the submerged portions of a ship's hull seems to have been long acknowledged and practiced but corrosion related failure of ship components continue to occur giving economical loss to ship owners. An enlightened approach to materials selection, protection and corrosion control is needed to minimize the risk of failures or major renewals of hull structures during the ship's expected life span. Further, Proper and cost effective corrosion protection measures are necessary to maintain the asset value of the vessel with a special emphasis on the means and methods now being adopted in international regulatory regimes to contain it. This paper addresses the causes of corrosion in ship and the way in which corrosion can be reduced or entirely eliminated in a ship by integrating both technical and non technical methods of corrosion control
Microstructural Characterization and Mechanical Behavior of Copper Matrix Composites Reinforced by B4C and Sea Shell Powder
This paper investigates the microstructural and mechanical properties of copper metal matrix composites reinforced with B4C and crushed sea shell particles (fabricated using powder metallurgy). In powder form, copper is widely used in structural applications. Copper also possesses very good electrical and thermal conductivity, ductility, and corrosion resistance. B4C is the third-hardest-known material that also possesses excellent toughness and wear resistance. Sea shells are readily available along coastal areas. Therefore, an attempt has been made in this work to investigate the feasibility of its utilization in powder metallurgy. Two batches of samples were prepared. In the first batch, the percentage of boron carbide and copper powder were varied, and seashell powder was not included. In the second batch, the percentages of B4C, copper, and sea shell powder were varied in order to assess the change effected by the sea shell material. The sintered samples of both batches were subjected to microstructural characterization to ascertain the homogeneous distribution of the reinforcements. The microhardness and wear resistance of all of the fabricated samples were assessed. The results confirmed that the inclusion of 2% sea shell powder (by weight) with 10% boron carbide improved the wear resistance and hardness of the composite
Astrophysical constraints on primordial black holes in Brans-Dicke theory
We consider cosmological evolution in Brans-Dicke theory with a population of
primordial black holes. Hawking radiation from the primordial black holes
impacts various astrophysical processes during the evolution of the Universe.
The accretion of radiation by the black holes in the radiation dominated era
may be effective in imparting them a longer lifetime. We present a detailed
study of how this affects various standard astrophysical constraints coming
from the evaporation of primordial black holes. We analyze constraints from the
present density of the Universe, the present photon spectrum, the distortion of
the cosmic microwave background spectrum and also from processes affecting
light element abundances after nucleosynthesis. We find that the constraints on
the initial primordial black hole mass fractions are tightened with increased
accretion efficiency.Comment: 15 page
Generalized Brans-Dicke cosmology in the presence of matter and dark energy
We study the Generalized Brans-Dicke cosmology in the presence of matter and
dark energy. Of particular interest for a constant Brans-Dicke parameter, the
de Sitter space has also been investigated.Comment: 9 page
Coupling parameters and the form of the potential via Noether symmetry
We explore the conditions for the existence of Noether symmetries in the
dynamics of FRW metric, non minimally coupled with a scalar field, in the most
general situation, and with nonzero spatial curvature. When such symmetries are
present we find general exact solution for the Einstein equations. We also show
that non Noether symmetries can be found.
Finally,we present an extension of the procedure to the Kantowski- Sachs
metric which is particularly interesting in the case of degenerate Lagrangian.Comment: 13 pages, no figure
Phase-plane analysis of Friedmann-Robertson-Walker cosmologies in Brans-Dicke gravity
We present an autonomous phase-plane describing the evolution of
Friedmann-Robertson-Walker models containing a perfect fluid (with barotropic
index gamma) in Brans-Dicke gravity (with Brans-Dicke parameter omega). We find
self-similar fixed points corresponding to Nariai's power-law solutions for
spatially flat models and curvature-scaling solutions for curved models. At
infinite values of the phase-plane variables we recover O'Hanlon and Tupper's
vacuum solutions for spatially flat models and the Milne universe for negative
spatial curvature. We find conditions for the existence and stability of these
critical points and describe the qualitative evolution in all regions of the
(omega,gamma) parameter space for 0-3/2. We show that the
condition for inflation in Brans-Dicke gravity is always stronger than the
general relativistic condition, gamma<2/3.Comment: 24 pages, including 9 figures, LaTe
The Rare Decays \ and \ Beyond Leading Logarithms
We analyze the branching ratio for the FCNC mode \ in
the standard model with QCD effects taken into account consistently to
next-to-leading order. This involves a two-loop renormalization group analysis
for the charm contribution, presented in this paper, and the calculation of
corrections to all orders in for the top-quark case
that we have described elsewhere. The inclusion of next-to-leading corrections
reduces considerably the theoretical uncertainty due to the choice of the
renormalization scales, inherent in any calculation to finite order in
perturbation theory. For \ this point has not been
discussed previously. In particular, the related uncertainty in the
determination of from is reduced from
to for typical values of the parameters. Simultaneously
also the dependence of on the choice of is
considerably reduced. We also give the next-to-leading order expression for the
short-distance part of . Impacts of our calculations on the
determination of the unitarity triangle are presented.Comment: 40, MPI-Ph/93-4
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