Volume 15 (2022)
Volume 14 (2021)
Volume 13 (2020)
Volume 12 (2019)
Volume 11 (2018)
Volume 10 (2017)
Volume 9 (2016)
Volume 8 (2015)
Volume 7 (2014)
Volume 6 (2013)
Volume 5 (2012)
Volume 4 (2011)
Volume 3 (2010)
Volume 2 (2009)
Volume 1 (2008)
A review on earth tube heat exchanger in heating and cooling systems

Doaa Rokan Hussain; Muna Sabah Kassim

Volume 16, Issue 2 , June 2023, Pages 76-81

https://doi.org/10.30772/qjes.v16i2.847

Abstract
  About 40% of the primary energy in the building sector is consumed for heating and cooling applications, where it started by relying on the use of sustainable energy sources through using an Earth tube heat exchanger (ETHE). ETHE is apparatus that works to transfer heat from ambient air to underground ...  Read More

A scientometric study and a bibliometric review of the literature on the design and construction of semi-flexible pavement

Rania Ihsan Ali; Basim H. Al-Humeidawi

Volume 16, Issue 2 , June 2023, Pages 82-91

https://doi.org/10.30772/qjes.v16i2.921

Abstract
  In last years, a new type of pavement has gained popularity, this type is called Semi-Flexible Pavement (SFP). It consists of porous asphalt with high air voids between (25-35) % filled with cementitious grout materials. This type of pavement substance offers substantial advantages over both common types ...  Read More

Comparison between the two methods of optimization: Genetic algorithm (GA) and ant colony algorithm (ACO) for the propulsion system of UAV

Mohammed Kareem Khashan; Dhamyaa S. Khudhur; Hyder H. Balla

Volume 16, Issue 2 , June 2023, Pages 92-95

https://doi.org/10.30772/qjes.v16i2.861

Abstract
  A propeller generates lift in the direction of revolution, similar to a revolving wing. Many previous propeller optimization techniques exist; nevertheless, they often find the optimal thrust coefficient at a constant power coefficient and vice versa. Using two types of algorithms, the genetic algorithm ...  Read More

Influence of Cutting Parameter on Scarface Quality in Dry Turning of Different Materials

Zainab Hussein Mohsein; Ahmed Basil Abdulwahhab; Diana Abed Alkareem Noori

Volume 16, Issue 2 , June 2023, Pages 96-101

https://doi.org/10.30772/qjes.v16i2.850

Abstract
  In machining operations, surface roughness (Ra) is an essential measure of product quality. It is determined by the cutting settings. The parameters that have been worked on are the Feed (F) (0.72, 0.88, 0.96, 1.12 mm/min), depth of cut (DOC) (0.5mm), and spindle speed (N) (545, 710, 1000, 1400 r.p.m). ...  Read More

Density, load and fly ash effect on stabilization of high plasticity soil with lime

Soewignjo Agus Nugroho; Sri Prabandiyani R. Wardani; Agus Setyo Muntohar

Volume 16, Issue 2 , June 2023, Pages 102-107

https://doi.org/10.30772/qjes.v16i2.925

Abstract
  The reuse recycling materials or industrial waste materials with aims to reduce pollution and environmental pollution, strongly supports concept of green building. Fly Ash is result of combustion pulverized system coal at the PLTU Tenayan, is no longer included in the B3 waste category. The usage of ...  Read More

Aerodynamic lift coefficient prediction of supercritical airfoils at transonic flow regime using convolutional neural networks (CNNs) and multi-layer perceptions (MLPs)

Olalekan Adebayo Olayemi; Oluwadolapo Isaac Salako; Abdulbaqi Jinadu; Adebowale Martins Obalalu; Benjamin Elochukwu Anyaegbuna

Volume 16, Issue 2 , June 2023, Pages 108-115

https://doi.org/10.30772/qjes.v16i2.955

Abstract
  Designing an aircraft involves a lot of stages, however, airfoil selection remains one of the most crucial aspects of the design process. The type of airfoil chosen determines the lift on the aircraft wing and the drag on the aircraft fuselage. When a potential airfoil is identified, one of the first ...  Read More

Two parametric SEE transformation and its applications in solving differential equations

Ali Moazzam; Emad A. Kuffi; Zain Ul Abideen; Ayza Anjum

Volume 16, Issue 2 , June 2023, Pages 116-120

https://doi.org/10.30772/qjes.v16i2.891

Abstract
  Transformation plays a much more important role in every science. In this research article, two parametric forms of SEE transformation have been explored and the fundamental properties of two parametric SEE transformations have been shown. Furthermore, the transformed function of some fundamental functions ...  Read More

Investigation on aerodynamic performance of H-type darrieus vertical axis wind turbine with different series airfoil shapes

Sivan Karima Arif; Iyd Eqqab Maree

Volume 16, Issue 2 , June 2023, Pages 121-126

https://doi.org/10.30772/qjes.v16i2.881

Abstract
  Wind energy is one of the most important renewable energies since it reduces environmental pollution. Darrieus VAWTs with straight-bladed are more prevalent in small-scale power generation due to their simple blade design and easy construction. The investigation of the performance of VAWTs is a topic ...  Read More

Parameters estimation of non-saturated permanent magnet synchronous machines by aid of statistical analysis

Mazen M. Al-Ibraheemi; Fatih Anayi; Mahdi Wahhab Neamah; Zainb Hassan

Volume 16, Issue 2 , June 2023, Pages 127-132

https://doi.org/10.30772/qjes.v16i2.877

Abstract
  The rotor position value is the most important parameter in synchronous machines.  In this paper, a MATLAB model of high-resolution rotor position determination at zero speed, without any position sensor, is presented for a non-saturated permanent magnet motor. The motor current and voltage responses ...  Read More

The types of spatial adaptability based on user preferences of low-income apartments in erbil city

Arazu Askandar Hamad; Husein Ali Husein

Volume 16, Issue 2 , June 2023, Pages 133-144

https://doi.org/10.30772/qjes.v16i2.932

Abstract
  Spatial adaptability is the ability of floor plans to adapt to families' changing needs and requirements over time. Apartment floor plans that are not designed according to the user's preferences cannot meet his or her changing needs over time. So, an adaptable apartment floor plan is considered a desirable ...  Read More