851 research outputs found
Automation of real-time X-ray scans
The present day needs of the commercial market have forced the industry to manufacture materials which are stronger, weigh less and cost less. In other words, it is of prime concern to characterize the material properties. The characterization of a material can be done either at the time of fabrication or while the material is being used. A material can be tested in two ways, destructively or non-destructively. In destructive means of testing materials, a sample is selected randomly from a batch and is inspected thoroughly and the results are extrapolated in a manner so that they represent the whole batch. Since there is a need of high performance parts to be inspected while they are in use, this method of testing cannot be used. Hence, there is a need for alternate means of testing these type of materials which is answered by nondestructive testing
Fatal pulmonary embolism following shoulder arthroplasty: a case report
<p>Abstract</p> <p>Introduction</p> <p>Fatal pulmonary embolism following a shoulder joint replacement is a rare event. The exact prevalence of shoulder arthroplasties is not clear. Unlike hip and knee joint replacements where some form of thromboprophylaxis is routinely prescribed, no such guidelines and practice exist for shoulder replacements. Other case reports have confirmed fatal and non-fatal pulmonary embolisms following shoulder replacements, but particular risk factors were identifiable in those patients.</p> <p>Case presentation</p> <p>We report the case of a 73-year-old Caucasian woman with fatal pulmonary embolism secondary to a calf deep vein thrombosis following a shoulder joint replacement procedure. The patient was otherwise healthy; there were no other risk factors directly contributing to deep vein thrombosis and pulmonary embolism except for a body mass index of 34. Post-mortem examination confirmed that the patient had a thrombus in the calf and a pulmonary embolus.</p> <p>Conclusions</p> <p>Fatal deep vein thrombosis and pulmonary embolism can occur following shoulder joint replacements in otherwise normal patients. A high degree of suspicion should therefore be maintained in susceptible individuals. Thromboprophylaxis needs careful consideration in shoulder replacements in susceptible individuals.</p
Pancreatitis with pancytopenia: are we missing a common diagnosis?
Acute pancreatitis with pancytopenia is a rare unreported complication of dengue non-hemorrhagic fever. A 16-year-old girl came to the emergency with complaints of loose stools and vomiting with pain abdomen and mild fever the previous day. She was diagnosed to have acute pancreatitis, which evolved into pancytopenia. She was then diagnosed with dengue fever. She was successfully managed conservatively nil orally, with intravenous fluids therapy as per the dengue protocol, timely investigations and watchful management. Acute pancreatitis with pancytopenic blood picture must point the clinician to underlying causes like dengue in endemic areas
Chemical Reactive Flow past a Parabolic Vertical Plate with Exponentially Accelerated Temperature and Uniform Mass Transfer
The topic of flow across an infinitely wide parabolic vertical sheet with
accelerating reactions of chemicals and heating is addressed in this article.
The Laplace transform method is used to rectify the dimensioned equations that
govern of movement into a set of non-dimensional regulating mathematical
equations of motion. It is found that thermal energy as well as chemical
responses have a substantial impact on the rates of both mass and heat
transmission. Using analytical formulas, create temperatures, concentrations,
and velocity personas. The physical aspects of various components, including
acceleration (a), thermal radiation parameter (R), chemical reaction parameter
(K), thermal Grashof number (Gr), mass Grashof number (Gc), Schmidt number
(Sc), Prandtl number (Pr), and time variable (t) are investigated. By drawing
graphs, characteristics of the velocity, temperature, and concentration are
examined
HOMOTOPY ANALYSIS METHOD TO SOLVE BOUSSINESQ EQUATIONS
In this paper, Homotopy analysis method is applied to the nonlinear coupled differential equations of classical Boussinesq system. We have applied Homotopy analysis method (HAM) for the application problems in [1, 2, 3, 4]. We have also plotted Domb-Sykes plot for the region of convergence. We have applied Pade for the HAM series to identify the singularity and reflect it in the graph. The HAM is a analytical technique which is used to solve non-linear problems to generate a convergent series. HAM gives complete freedom to choose the initial approximation of the solution, it is the auxiliary parameter h which gives us a convenient way to guarantee the convergence of homotopy series solution. It seems that more artificial degrees of freedom implies larger possibility to gain better approximations by HAM
Closed Form Solution for Parabolic Flow of a Inclined Isothermal Plate With Uniform Mass Diffusion
The fluid flow across an unbounded horizontal plate embedded with uniform
mass diffusion is studied in this article together with the impacts of the
chemical reaction and parabolic motion, while the temperature and concentration
of the plate remain constant. Using initial and boundary conditions, partial
differential equations were used to describe this phenomenon. Introduce some
appropriate non-dimensional variables and utilize the Laplace transform method
to solve the corresponding dimensionless equations. The following analytical
remedies for heat, velocity and concentration profiles were produced in terms
of exponential and (erfc) complementary error functions. A MATLAB programme is
used to exhibit the results as graphs for various parameters. By creating
graphs, we may assess the characteristics of the velocity, Heat and
concentration while also studying the physical aspects for various factors
Thermal Emission of WASP-14b Revealed with Three Spitzer Eclipses
Exoplanet WASP-14b is a highly irradiated, transiting hot Jupiter. Joshi et
al. calculate an equilibrium temperature Teq of 1866 K for zero albedo and
reemission from the entire planet, a mass of 7.3 +/- 0.5 Jupiter masses and a
radius of 1.28 +/- 0.08 Jupiter radii. Its mean density of 4.6 g/cm3 is one of
the highest known for planets with periods less than 3 days. We obtained three
secondary eclipse light curves with the Spitzer Space Telescope. The eclipse
depths from the best jointly fit model are +/- at 4.5
{\mu}m and +/- at 8.0 {\mu}m. The corresponding brightness
temperatures are 2212 +/- 94 K and 1590 +/- 116 K. A slight ambiguity between
systematic models suggests a conservative 3.6 {\mu}m eclipse depth of
+/- and brightness temperature of 2242 +/- 55 K. Although extremely
irradiated, WASP-14b does not show any distinct evidence of a thermal
inversion. In addition, the present data nominally favor models with day night
energy redistribution less than . The current data are generally
consistent with oxygen-rich as well as carbon-rich compositions, although an
oxygen-rich composition provides a marginally better fit. We confirm a
significant eccentricity of e = 0.087 +/- 0.002 and refine other orbital
parameters.Comment: 16 pages, 16 figure
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