Effects of Aerosol Scattering Attenuation on Free-Space Optical Link Performance in Owerri, Southeast, Nigeria | Chapter 1 | Science and Technology: Developments and Applications Vol. 8

High-speed, point-to-point data transmission through laser beams across terrestrial networks is sometimes referred to as "Free-Space Optics" (FSO). Multimedia applications including social networks, OTT platforms, video conferencing, and multimedia streaming are driving up the demand for data rates and channel bandwidth, which has led to a telecommunications bottleneck. In spite of the several benefits of using free-space optical (FSO) communication systems as complementary platforms for next-generation networks, the existence of atmospheric disturbances such as fog and scintillations are key sources of signal impairment that affect system performance. Thus, it is crucial to learn about the specific weather patterns of the areas where FSO lines will be installed. The purpose of this work is to estimate the availability performance of FSO lines broadcasting at both 850 nm and 1550 nm by performing a statistical analysis of meteorological visibility data gathered for Owerri in Nigeria over a 21-year period (2000-2021). The results show that the visibility during the most common fog events in Owerri is 100 meters. The probabilities of encountering and exceeding the scattering attenuations associated with Owerri's most common fog event are 0.0002 and 0.0229, respectively. This research could be expanded in the future by exploring the effects of varying localized climatic conditions on the many forms of optical signals, such as plane, spherical, and Gaussian beam waves. This would aid in the modelling of different forms of attenuation for deployment sites of FSO or hybrid FSO systems.

 

Author (s) Details

S. A. Akinwumi
Department of Physics, College of Science and Technology, Covenant University, PMB 1023, Ota, Ogun State, Nigeria.

 

O. A. Ayo-Akanbi
Department of Physics, College of Science and Technology, Covenant University, PMB 1023, Ota, Ogun State, Nigeria.

 

T.V. Omotosho
Department of Physics, College of Science and Technology, Covenant University, PMB 1023, Ota, Ogun State, Nigeria.

 

O. O. Ometan
Department of Physics, Lagos State University, Ojo, Lagos State, Nigeria.

 

O. M. Adewusi
Department of Physics, Lagos State University, Ojo, Lagos State, Nigeria.

 

Please see the book here:- https://doi.org/10.9734/bpi/stda/v8/3705

Discovery of Threshold Visibility Limit (TVL) Using the Number of Photons Intruding into the Human Eye and Possible Application to Outdoor Lighting | Chapter 5 | Fundamental Research and Application of Physical Science Vol. 7

 This phase addresses the threshold perceptibility limit (TVL) using the number of photons interrupting into the Human Eye. Understanding the human visual system's darkness performance is essential for crafty safe illumination for vehicular and pedestrian traffic in nightly outdoor built surroundings. Although assessing perceptibility is a complex process, the current knowledge of in what way or manner the eye endures and processes light and how well it can distinguish objects at miscellaneous lighting levels and distances is main. The current approach for calculating rustic lighting level necessities is complicated and limited to illuminance and radiance measurements and does not admit designers to evaluate the beginning visibility. This paper aims to expand an outdoor lighting perceptibility calculation utilizing the photons per second calculation system. This novel calculation arrangement is applied to the candlelight's visibility distance and the nebula's Vega star visibility to certify the calculation approach. The radiance calculation has many lacks and assumptions, including the established observer position and regarding angle, and the results do not correlate accompanying reality. It is complex and troublesome to assess or reach a consensus because millions of banner and luminances contrast anyone can witness in the surroundings. The quantitative estimate uses mathematical calculations to find the TVL and perceptibility distance of candlelight and vega star visibility from the Earth's surface. The approximate assessment form verifies and confirms the candlelight perceptibility distance. This is the first paper to find the TVL so that some future lighting application TVL maybe evaluated, and the necessary visibility level driven for a particular vehicular and pedestrian traffic security in nighttime outdoor surroundings. This paper will help researchers, chemists, engineers, consultants, builders, lighting designers, and management agencies seeking to increase outdoor illumination for safety, well-being, well-being, and character of life in the built atmosphere.

Author(s) Details:

Uthayan Thurairajah,
WSP Canada, 100 Commerce Valley Dr. W., Thornhill, Ontario, L3T 0A1, Canada.

Please see the link here: https://stm.bookpi.org/FRAPS-V7/article/view/11120

An Elite Roadway Illuminance Calculation (ERIC) Method Provides Optimum Performance and Cost-saving without Compromising Safety | Chapter 7 | Recent Progress in Science and Technology Vol. 8

 This paper addresses the troubles and consequences of the radiance calculation method for road lighting uses and recommends a novel illuminance calculation means as the best hold right to Roadway Lighting Applications. This change would lower the costs of roadway lighting design while growing safety, helping both society and the declaration. Luminance calculations are complex, communicable approximately five times because the new illuminance calculation form, providing no additional insight, and flexible the same design consequence. This paper conducts a comparative study and analyzes two together methods utilizing regular comparative reasoning, quantitative and concerning qualities not quantities assessments, and offers a resolution to the over-50-year-old challenge. The determinable evaluation uses a sample record of what happened and examines its matching benefit-cost ratio. The concerning qualities not quantities approach entails conducting a survey of peers and ignition designers. This is the first paper to address all of the parameters of road lighting in a comprehensive conduct. This paper will be helpful for professors, researchers, scientists, engineers, experts, architects, illumination designers, contractors, developers, monetary institutions, and administration agencies funding rustic lighting.

Author(s) Details:

Uthayan Thurairajah,
WSP Canada, 100 Commerce Valley Dr. W., Thornhill, Ontario, L3T 0A1, Canada.

Please see the link here: https://stm.bookpi.org/RPST-V8/article/view/10063