This paper reports the use of a mathematical model to predict the productivity of a simple solar still under different climatic, design and operational parameters in Oman. The shallow water basin, 23 cover tilt angle, 0.1 m insulation thickness and asphalt coating of the solar still were found to be the optimum design parameters that produced an average annual solar still yield of 4.15 kg/m day...

It is not straightforward to determine resolution for a 3D reconstruction when performing an electron tomography experiment. Different contributions such as missing wedge and misalignment add up and often influence the final resolution in an anisotropic manner. The conventional resolution measures can not be used for all of the reconstruction techniques, especially for iterative techniques whic...

BACKGROUND DATA Minimizing fluoroscopy time in spine interventions is critical for time of procedure as well as radiation safety of the patient and medical personnel. Specific fluoroscopy angle settings for fluoroscopically guided L4-S1 transforaminal epidural injections (TFEIs) have not been described. OBJECTIVES To describe the most common encountered settings for the C-arm fluoroscope angl...

Due to the increase in energy consumption and environmental pollution recent years, countries have included renewable their long-term policies by supporting researches usage diversity performance of sources. Solar energy, one these types, its various applications are great importance production diversity. In this context, evaluation monocrystalline polycrystalline photovoltaic panel was perform...

In this paper experimentally, the friction-stir welding of the polypropylene sheets with 40% glass fiber has been investigated. Comparison to other welding methods, the strength of the joint is the most important feature in this process. Many parameters such as tool geometry, rotational speed, linear velocity, and tilt angle are very important as input parameters in this type of welding. Theref...

PURPOSE To investigate whether lamina cribrosa (LC) defects are associated with optic disc morphology in primary open angle glaucoma (POAG) eyes with high myopia. METHODS A total of 129 POAG patients and 55 age-matched control subjects with high myopia were evaluated. Three-dimensional scan images obtained by swept source optical coherence tomography were used to detect LC defects. Radial B-s...

To objectively quantify airway geometry from three-dimensional computed tomographic (CT) images, an idealized (circular cross section) airway model is parameterized by airway luminal caliber, wall thickness, and tilt angle. Using a two-dimensional CT slice, an initial guess for the airway center, and the full-width-half-maximum principle, we form an estimate of inner and outer airway wall locat...

A key factor in the performance of PV panels is tilt angle, adjustable via various tracking systems. Fixed angle miss out on most solar radiation each day whereas continuous systems are not always cost-efficient, rather impractical some cases. Therefore, adjusting using a limited number periods per year can be good, compromised solution. In this paper, new approach proposed to maximize impact b...