PURPOSE A newly developed head-mounted perimeter termed "imo" enables visual field (VF) testing without a fixed head position. Because the positional relationship between the subject's head and the imo is fixed, the effects of head position changes on the test results are small compared with those obtained using a stationary perimeter. However, only ocular counter-roll (OCR) induced by head til...

In this paper, forecasting models were constructed to estimate surface solar radiation on an hourly basis and the solar irradiance received by solar panels at different tilt angles, to enhance the capability of photovoltaic systems by estimating the amount of electricity they generate, thereby improving the reliability of the power they supply. The study site was Tainan in southern Taiwan, whic...

One of the subjects in solar water heater design is considering distribution of hot water consumption during the day. For example, each of the household, commercial, office, school, and industrial consumptions have a particular distribution of hot water consumption named pattern in this article. In solar computation principles, the effect of longitude, latitude, and altitude on collector angle ...

in this study, stability of geosynthetic reinforced soil retaining walls investigated using plaxis code that is based on finite element method. the effects of axial stiffness, length and vertical space between geosynthetic layers, internal friction angle of soil wall and cohesion of foundation on deformations of wall and maximum axial force of geosynthetic have been investigated. results of ana...

Digital filters are used for identification, prediction, and modeling of hidden objects in dynamic systems. These Gaussian filter with power spectrum depth estimation, edge detection the as well constructed 2-D geomagnetic objects. In this paper, digital results obtained by MATLAB software. Magnetometer instrument is to collect aeromagnetic data Aeromagnetic collected from Aswan area Egypt. cod...

One of the main problems after total knee arthroplasty is pain in the patellofemoral joint, which in some cases leads to revision surgery. Rotation of the femoral component has a significant influence on the path followed by the patella within the patellofemoral joint. We examined the influence of rotation of the femoral component after total knee arthroplasty on patellar tilt. We retrospective...

Sun, a free source of energy, has moved the world to consider photovoltaic (PV) system as green renewable energy since fossil fuel power plant accounts for significant share greenhouse gas (GHG) emissions across globe. The output PV is limited many factors; however, acute accuracy orientation (tilt and azimuth) angles exposes surfaces high doses solar radiations. Which increases output; in turn...

slow sand filtration (s.s.f) is a main process in the water treatment technology and generally considered as most appropriate for application in rural and small urban areas in developing countries. however, performance of the s.s.f is very sensitive to high turbidity levels. therefore, pretreatment is necessary for such waters. horizontal - flow roughing filtration (hfrf) and direct horizontal ...

This study represents advancements in the state-of-the-art of the solar energy industry by leveraging LiDAR-based building characterization for city-wide, distributed solar photovoltaics, solar maps, highlighting the distribution of solar energy across the city of San Antonio. A methodology is implemented to systematically derive the tilt and azimuth angles of each rooftop and to quantify solar...

The irradiance of the Sun changes slightly with the solar cycles. In this paper the variation of heliospheric current sheet tilt angle with the total solar irradiance is examined. The average value of the tilt angle, following both the radial and the classic models are considered at length with a view to re-look some interesting features. Intensity of protons and antiprotons in different solar ...