Power series expansions in ka are derived for the pressure at the edge of a radiator, the reaction force on the radiator, and the total radiated power arising from a harmonically excited, resilient, flat, circular radiator of radius a in an infinite baffle. The velocity profiles on the radiator are either Stenzel functions (1-(sigma/a)2)n, with sigma the radial coordinate on the radiator, or li...

Complete partitioning wilb boneyoomb-Iike struetuIes bas previously been proposed to reduce heat transfer by natural convection. at the expense of direct oonduction through the Struet\I.fe. in Ihe thin rectangular enclosures used for solar colleclors. 11tis paper presents the results of a sludy of the use of partial ballles for this purpose. 1be heat transfer rate was measured in glycerol using...

Integrating spheres are often used as calibration sources providing uniform radiance within a solid angle and/or uniform irradiance at a distance. The best performance in such a system can be achieved if one is able to evaluate as well as predict the important characteristics of the sphere system’s output, such as the spatial and angular distributions of radiance over the exit port, or the dist...

An unusual case of anomalous drainage of the right lung is described. The right superior pulmonary vein drained into the superior vena cava, and the middle and lower pulmonary veins drained into the inferior vena cava. Repair was achieved by creating a pericardial baffle that drained the inferior vein and the orifice of the superior vena cava through a surgically created atrial septal defect. T...

A 7-year-old boy developed increasing cyanosis after a total cavopulmonary connection with a 3 mm fenestration in the baffle. Catheterisation performed 4 years and 7 months after the operation showed reopening of a left superior caval vein draining into the pulmonary venous atrium. Due to the large size of the left superior caval vein, and the absence of intrinsic stenosis, we chose to use an A...

Abstract The present study aimed at evaluating aquifer flow unit of Edem by means stratigraphic modified Lorenz plot (SMLP) employing vertical electrical sounding. results from the sounding field data analysis shows that resistivity and thickness layer ranges 34.8 to 67561.2 Ωm 29.7 147.6 m respectively having an average value 70.248 m. Aquifer permeability fractional porosity range 1.5942 1657...

The step-type energy dissipator is widely used to construct small- and medium-sized reservoirs with its high dissipation rate. In order further improve air entrainment characteristics dissipation, reduce the influence of cavitation, in this paper, we added a trapezoidal baffle block at convex corner traditional step form block-step combination dissipator. We hydraulic model experiments numerica...

Ulcerative colitis and Crohn's disease continue to baffle us with regard to their aetiology and pathogenesis. Indeed, our understanding has increased little since the early days of ulcerative colitis when the major debate concerned the role of the intestinal flora and the host's response to it. It seems well established that the familial incidence is about 10-15% and recent studies from Sweden,...

Platypnea orthodeoxia is a rare syndrome that describes breathlessness on standing that resolves on lying flat. We present a previously healthy patient who developed platypnea orthodeoxia in her eighth decade of life. Cardiovascular imaging demonstrated an atrial septal defect, extensive Chiari network and atrial septal hypertrophy. We propose the development of lipomatous atrial septal hypertr...

Postoperative data were obtained at cardiac catheterization in twelve patients studied 6-29 months following Mustard's operation for transposition of the great arteries (TGA) to assess the incidence and severity of abnormalities of right ventricular (RV) function. Age at operation was 5-13 months in seven patients (infant group) and 19-25 months in the remaining five patients. RV end-diastolic ...