Print ISSN: 1681-6900

Online ISSN: 2412-0758

About Journal

Engineering and Technology Journal is a global, scientific and Open Access journal. Publishing under the license of Creative Commons Attribution 4.0 International (CC-BY), this journal is published monthly by the University of Technology (UOT), Iraq, since 1977 (printed version) and since 2005 (online version). ETJ publishes original articles and review papers in the fields of engineering and science. The journal is using a double-blind peer-reviewing system to assure the quality of the publication. The Turnitin service is used to prevent plagiarism and to ensure the...
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Journal Information

Publisher: University of Technology-Iraq

Email:  etj@uotechnology.edu.iq

Editor-in-chief: Prof. Dr. Qusay F. Alsalhy

Print ISSN: 1681-6900

Online ISSN: 2412-0758

Volume 37 (2019)
3B
4C
12A
11A
10A
9A
8A
7A
6A
3C
2B
5A
2C
1C
1B
4A
3A
2A
1A
Volume 36 (2018)
Issue 1
1C
Volume 31 (2013)
Issue 21
Issue 20
Issue 19
Issue 18
Issue 17
Issue 14
Issue 15
Issue 16
Issue 12
Issue 13
Issue 10
Issue 11
Issue 7
Issue 8
Issue 9
Issue 7
Issue 6
Issue 5
Issue 6
Issue 4
Issue 4
Issue 5
Issue 3
Issue 3
Issue 1
Issue 1
Issue 2
Issue 2
Volume 28 (2010)
Issue 24
Issue 22
Issue 23
Issue 20
Issue 21
Issue 18
Issue 19
Issue 16
Issue 17
Issue 14
Issue 15
Issue 12
Issue 13
Issue 10
Issue 11
Issue 8
Issue 9
Issue 6
Issue 7
Issue 4
Issue 5
Issue 1
Issue 2
Issue 3

Volume 40, Issue 8, August 2022


An Enhanced Interface Selectivity Technique to Improve the QoS for the Multi-homed Node

Haider W. Oleiwi; Nagham Saeed; Heba L. Al-Taie; doaa nteesha

Engineering and Technology Journal, 2022, Volume 40, Issue 8, Pages 0-0
DOI: 10.30684/etj.2022.133066.1165

The user’s handoff is still an arguable issue that many mobile communication systems face, especially with the exploded growth of users and internet-based applications. There is a critical need for adequate quality of service (QoS) to meet the stringent requirements. This paper aims to study the overall performance and feasibility of several QoS mechanisms with the single-homed and multi-homed networks/nodes fluctuating resource availability. It investigates the adaptability of multi-interfaced multi-homed techniques to enhance the essential governing parameters, i.e., throughput, end-to-end latency, processing time, and jitter. Moreover, the paper introduces an interface selectivity technique for the multi-homed node to adopt the optimal interface, which offers the best services to explore the enhancements of the overall network performance. The overall results show how the introduced mechanism managed to keep the communication going on the multi-homed node. Furthermore, the results show that site multi-homing provides a better overall end-to-end latency over host multi-homing as it supports the entire network.

Power Quality Examination for (250KW) PV Grid-tied Connected at Various Irradiance Levels

Ahmed A. Jasim; Dahri Y. Mahmood; Oday A. Ahmed

Engineering and Technology Journal, 2022, Volume 40, Issue 8, Pages 0-0
DOI: 10.30684/etj.v40i8.1831

Although using a PV grid-tide system has many advantages, connecting the PV to the grid creates a new challenge at the power quality level. The PV grid-tide plant (250 kW), implemented at the Iraqi ministry of electricity building, was taken as a case steady to examine the power quality issue at various irradiance levels. The plant was described in detail and built using MATLAB2018b/Simulink. The developed system was examined at various irradiance levels. The results showed that an increased irradiance level leads to an enhancement in the power quality. The total harmonic distortion (THD) decreases with the increase of irradiance. Such behavior has a good impact on the power quality, where the (THD) is considered a crucial parameter in the power quality issue and increased irradiance level, leading to increased injected power to the grid. Up to the date of writing this study, the power quality effect of the installed (250 kW) PV grid-tied system on Iraqi grid utility was not previously studied, whether for the studied system or another PV grid-tied system installed in Iraq.

The Fundamental of Reduced Graphene Oxide with Nanosilver Composite Films Using the Spin Coating Technique

Hamsa A. Alaloosi; Farah T. M. Noori; Abdulhadi K. Jidran

Engineering and Technology Journal, 2022, Volume 40, Issue 8, Pages 0-0
DOI: 10.30684/etj.v40i8.2205

Graphene oxide synthesis by hummers method and reduction by the green chemical method using green tea. Preparation films with reduced graphene oxide (rGO) and Silver Nanoparticles (AgNPs) by a spin coating method. The preparation films and Nanomaterial characteristics with X-Ray diffraction (XRD) GO has a peak at (2θ = 11.22̊ ). While rGO has a wider peak at (2θ = 26.2̊ ). The (rGO +AgNPs) films have five obvious diffraction angles. In Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX), flaky sheet (rGO), and spherical (AgNPs) with Nanosize about ~20 nm, the peaks of EDX indicated the presence of Carbon, silver, and oxygen. The energy gap was calculated from the absorbance spectrum and seemed to decrease with increasing AgNPs.

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