Issue 8
Research Paper
An Enhanced Interface Selectivity Technique to Improve the QoS for the Multi-homed Node
Engineering and Technology Journal,
2022, Volume 40, Issue 8, Pages 0-0
DOI:
10.30684/etj.2022.133066.1165

Power Quality Examination for (250KW) PV Grid-tied Connected at Various Irradiance Levels
Engineering and Technology Journal,
2022, Volume 40, Issue 8, Pages 0-0
DOI:
10.30684/etj.v40i8.1831

The Fundamental of Reduced Graphene Oxide with Nanosilver Composite Films Using the Spin Coating Technique
Engineering and Technology Journal,
2022, Volume 40, Issue 8, Pages 0-0
DOI:
10.30684/etj.v40i8.2205

The Visual Quality of Healthy Eye Lens for Different Tilt Effects
Engineering and Technology Journal,
2022, Volume 40, Issue 8, Pages 0-0
DOI:
10.30684/etj.v40i8.2197

The eye lens tilt is possibly due to a specific accident such as a blow or the like. So, this manuscript was submitted to study the human eye lens tilting effect on visual performance and determine the tolerance tilt values. Using (ZEMAX-EE) software program and relying on the Liou and Brennan model Eye (LBME), one of the most accurate models for studying the eye, and some basic criteria used to describe the image formed in an optical system, such as Modulation Transfer Function (MTF), Root Main Square-spot size (RMSS), and simulated image including aberration, the study of the lens tilt effect on visual quality was conducted. The calculation of the area under the MTF curve was also used to determine the tolerance tilt values. Where the lens was tilted from (-5 to 5) degrees by (1 degree) on the (X and Y) axes, for zero decentering, with visible wavelength (0.486, 0.587, 0.656) µm, pupil diameter (2.5 mm), and field of view (5o).The results were that vision worsened when the lens was tilted due to reduced MTF. Sagittal MTF was less sensitive than Tangential due to the nature of the lens structure. The area under the MTF curve results also proved that the tilt is less than (5) degrees does not affect the visual much, so it was necessary to determine the tilt tolerance values.It was concluded that the visual quality was inversely proportional to the tilt increase. Exceeding the tilt (5) degrees led to visual deterioration due to increased optical aberration where the tolerance tilt ranges were (± 5.1) degrees and (- 5.9 to 9) degrees on the (x and y) axes, respectively.
A Review of Control Technique Applied in Shunt Active Power Filter (SAPF)
Engineering and Technology Journal,
2022, Volume 40, Issue 8, Pages 0-0
DOI:
10.30684/etj.v40i8.2116
In recent years, electronic transformers and electronic devices (nonlinear loads) have increased. These loads are the source of harmonics (non-sinusoidal and distorted waves) and the interactive force that affects the performance of the power system network. Also, it badly affects the power factor and electrical energy on the scales of efficiency and quality. For this reason, a system called “Active Power Filters” has been adopted. It provides an effective alternative to traditional LC passive power filters. It can improve network performance by treating and reducing harmonics, improving power factor and quality, avoiding resonance between the filter and the network, and reducing reactive power. This paper presents a study on the shunt active power filters device and how to connect it to the distribution network and A review of the bathing control strategies in the methods of calculating current and power, methods of controlling the PWM device, the most prominent techniques for improving the PID control system, and the most prominent algorithms applied in that to improve the safety performance of the Shunt Active Power Filter (SAPF) on the one hand and to demonstrate the ability of different systems to compensate for THD on the other hand. APF performance fluctuates from one control strategy to another. It reduced (THD) between 0.9% and 13% in several control techniques applied with PWM. The aim of this paper is to illustrate the techniques applied to control the performance of the "Shunt Active Power Filter" to reduce THD