Volume 16 (2023)
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)

Using the golden ratio in detecting the aesthetics of Mosque facades: The case of contemporary Mosques in Erbil city

Saya Jamal Rashid; Faris Ali Mustafa; Faten Radhwan Yaseen

Articles in Press, Accepted Manuscript, Available Online from 01 March 2024

https://doi.org/10.30772/qjes.2023.141688.1007

Abstract
  From ancient Greece till the present, the golden ratio has been considered one of the most significant criteria of beauty in art and architecture. Architectural forms are part of the visual language that is bound by the rules of geometry and proportion. This study aims to identify the extent to which ...  Read More

Structural Classification of Planetary-Gear-Cam Mechanisms

Farah Mohammed Saoud; Sajad Hussein Abdali; Essam Esmail

Articles in Press, Accepted Manuscript, Available Online from 01 March 2024

https://doi.org/10.30772/qjes.2023.142157.1015

Abstract
  Planetary gear-cam mechanisms (PGCMs) are mechanisms that combine planetary gears and cams. Despite the fact that these systems have the ability to achieve a wide variety of periodic motions of the output link, they have received little attention. To generate and classify PGCMs, structural properties ...  Read More

Suitable landfill site selection for Al-Diwaniyah City using a geographic information system

Mukhalad Muayada; Hussein Jannaa

Articles in Press, Accepted Manuscript, Available Online from 01 March 2024

https://doi.org/10.30772/qjes.2024.182155

Abstract
  One of the main problems in the city of Diwaniyah is finding suitable places for burying waste. Geographic Information System (GIS) is an appropriate tool used for this purpose. The city of Diwaniyah, like other Iraqi governorates, is not equipped with an organized system for burying urban waste. The ...  Read More

Interface Shapes and Flow Behaviour in Duct Systems under Critical and Sub-Critical Flow Conditions

Manar A. Abdulrahman; Suha I. S. Al-Ali; Mohammed Nsaif Abbas

Articles in Press, Accepted Manuscript, Available Online from 01 March 2024

https://doi.org/10.30772/qjes.2023.143635.1037

Abstract
  This article delves into the intricate dynamics of groundwater flow within duct systems, ‎examining both critical and sub-critical flow conditions. Employing mathematical models, ‎sophisticated potential methodologies, numerical simulations, and flow net analysis, the ‎research investigates ...  Read More

Heat transfer augmentation by using different techniques in small scale channels: A review study

Naseer Hamza; Haider A. Abdul kazem

Articles in Press, Accepted Manuscript, Available Online from 30 August 2023

https://doi.org/10.30772/qjes.2023.141640.1005

Abstract
  In this paper highlights the most significant recent developments in scientific study on Heat sinks are thermal management components made of materials with sufficient thermal conductivity qualities. Due to the increase in operating power and speed as well as the general reduction in system size, the ...  Read More

A Graph-Based Method For Detecting Isomorphism of Geared Kinematic Chains Using a Circuit Matrix and Vertex Degree Array.

Sajad Hussein Abdali; Farah Mohammed Saoud; Essam Esmail

Articles in Press, Accepted Manuscript, Available Online from 30 August 2023

https://doi.org/10.30772/qjes.2023.142060.1010

Abstract
  Several approaches for detecting isomorphism in kinematic chains have been developed in recent literature. If two kinematic chains have a 1-1 correspondence and their incidences are maintained, they are isomorphic. In this work, a matrix-based method for identifying isomorphism is presented. The new ...  Read More

A review of modelling and inspection techniques at the micro- and nanoscales of dry friction of rough surfaces

muhammed Abdulhasan Muhammed; Nabeel Shallal Almuramady

Articles in Press, Accepted Manuscript, Available Online from 30 August 2023

https://doi.org/10.30772/qjes.2023.141737.1008

Abstract
  In reality, there are a number of tiny contact asperities on the contact surface, which may be seen at the micro/ nano scales. The total mechanical behavior is the product of all asperities that are involved during the contact. There are still a lot of unresolved issues in the study of contact and dry ...  Read More

A critical review of forced convection in microchannels

Ahmed Ali Shakir Al-Saadi

Articles in Press, Accepted Manuscript, Available Online from 30 August 2023

https://doi.org/10.30772/qjes.2023.141506.1003

Abstract
  The dissipation of excessive heat flux is presently a significant issue that needs to be addressed due to the use of microdevices in fields such as nuclear energy, electronic devices, aerospace engineering, building engineering, and more. Because their increased heat transfer and compact size, microchannel ...  Read More

Criteria and Indicators Affecting the Most Appropriate Reuse of Heritage Buildings in Old Cities: Mosul Old City as a Case Study

Suroor Abdulghafoor Jasim; Emad Hani Ismaeel

Articles in Press, Accepted Manuscript, Available Online from 03 September 2023

https://doi.org/10.30772/qjes.2023.141934.1009

Abstract
  For the protection of historic city identity and providing a sustainable benefit to its buildings,the strategy of conserving heritage buildings in old cities through their reuse is complex and crucial.The most appropriate mechanism for reuse is the most widely used mechanism for preserving and enhancing ...  Read More

Post Occupancy Evaluation of Private Open Spaces in Dwelling Units in Single Family Investment Housing Projects in Erbil City

Shayan Shero Ahmed; Mand Ibrahim Dizayee

Articles in Press, Accepted Manuscript, Available Online from 23 September 2023

https://doi.org/10.30772/qjes.2023.141738.1011

Abstract
  Due to urbanization, it has been found that public open spaces shared in the city is not maintained in many cases, as new investments are trying to get use of the land to construct more buildings, same tendency has been noticed with residential estates. The treatment for the shortages of public open ...  Read More

A review of passive and active techniques for backward-facing step

ghaidaa kareem rahi; Dhafer Abdul Amir Hamzah

Articles in Press, Accepted Manuscript, Available Online from 27 September 2023

https://doi.org/10.30772/qjes.2023.142416.1019

Abstract
  This study reveals the increase in heat transfer using passive and active techniques for BFS. Backward- facing step (BFS) flow is one example of a representative model for separation flows which has been noted in its applications in engine flows, vehicles, condensers, heat transfer systems, and flow ...  Read More

The Knowledge Content of Digital Design Subject in Architecture Schools

Sarraa B. Younis; Dhuha A. Al-kazzaz

Articles in Press, Accepted Manuscript, Available Online from 13 October 2023

https://doi.org/10.30772/qjes.2023.143373.1031

Abstract
  The emergence and spread of digital technology in architectural design and professional practice has resulted in a restructuring of architectural education. Different approaches have emerged to integrate digital design into architectural curricula. This paper aims to identify accredited digital design ...  Read More

Investigation of an Automobile Air-Conditioner with a Liquid-Suction Heat Exchanger Using R134a and R1234yf

Ansam Akeel Mohammed

Articles in Press, Accepted Manuscript, Available Online from 20 October 2023

https://doi.org/10.30772/qjes.2023.143262.1030

Abstract
  Air-conditioning systems (ACs) are essential in hot and humid climates to ensure acceptable ambient air quality as well as thermal comfort for buildings users. It is essential to improve refrigeration system performance without increasing the effects of global warming potential (GWP) and ozone depletion ...  Read More

Thermal Analysis of Integrated Solar Combined Cycle Units With Application to South of Iraq

Rahmah Luqman Ibrahim; Abdulrahman Habbo Mohammed

Articles in Press, Accepted Manuscript, Available Online from 16 November 2023

https://doi.org/10.30772/qjes.2023.143607.1036

Abstract
  Recently, simple cycle play a significant role in electric power production in Iraq. However, those units suffer from low thermal efficiency and low power output. In the present work, theoretical study is carried out aiming to improve the performance of (AL-Amara station 125MW). The present work includes ...  Read More

A study of biodiesel production from waste cooking oil and its impact on diesel exhaust emissions with alcohol blends

ALi sadoon mohmmad

Articles in Press, Accepted Manuscript, Available Online from 29 November 2023

https://doi.org/10.30772/qjes.2023.143424.1032

Abstract
  Fuels based on petroleum have been used for many years. However, as the world strives to protect the environment, clean and renewable energy is becoming more sought after. Diesel fuel can be replaced with biodiesel and alcohol. One of the advantages of these fuels is that they are renewable and locally ...  Read More

Hydrodeoxygenation of Linoleic Acid Using Water as Hydrogen Source on Co/HB Zeolite

Fouz D Alqazweeny

Articles in Press, Accepted Manuscript, Available Online from 02 December 2023

https://doi.org/10.30772/qjes.2023.143941.1042

Abstract
  Hydrodeoxygenation (HDO) is a critical step in upgrading biomass-derived feed-stocks to renewable fuels and valuable chemicals. Thus, we preserve the environment through the use of agricultural waste. Water plays the role of solvent, reactant, or byproduct in biomass HDO reactions catalyzed by Co/HB ...  Read More

NiTa Superalloy Study for Its Importance in Modern Applications: A Review

qasim Abbas shammari

Articles in Press, Accepted Manuscript, Available Online from 09 December 2023

https://doi.org/10.30772/qjes.2023.142744.1022

Abstract
  Stoichiometric (NiTa) superalloys have lately acquired acceptability as an alternative to traditional current-generation alloys for applications requiring biomaterials. This is because to the high melting points and corrosion resistance of Ni and Ta. Nickel-based superalloys are highly prized in particular ...  Read More

Investigation of the effects of hybrid nanofillers on properties of PMMA composites compared to natural nano powder addition

maha kareem; Abbas Khalaf Mohammad

Articles in Press, Accepted Manuscript, Available Online from 09 December 2023

https://doi.org/10.30772/qjes.2023.143967.1043

Abstract
  PMMA (poly methyl methacrylate), a well-known polymer of the methacrylate family, is widely utilized in biomedicine, particularly in odonatological applications like artificial teeth, dentures and denture bases, obturators, provisional or permanent crowns, and so on. The outstanding qualities of PMMA, ...  Read More

Evidence-Based Design: The Role of Outpatient Design Elements on Medical Staff Satisfaction and Performance in a Post-COVID-19 Pandemic

Fouad Jalal Mahmood

Articles in Press, Accepted Manuscript, Available Online from 18 December 2023

https://doi.org/10.30772/qjes.2023.144869.1051

Abstract
  Contemporary hospitals may be recognized by a large variety of activities, not only delivery of care but also some concerns, such as the satisfaction level of users. This research investigates the relationship between outpatient department (OPD) design elements and medical staff satisfaction and performance, ...  Read More

Improving the efficiency of the automobile engine cooling system using hybrid MWCNT/Al2O3 as nanofluids

Ahmed A. Mohammed; H. I. Dawood; Helen N. Onyeaka

Articles in Press, Accepted Manuscript, Available Online from 27 December 2023

https://doi.org/10.30772/qjes.2023.144421.1047

Abstract
  Imagine enhancing engine efficiency with a focus on revamping cooling systems using an innovative substance called nanofluids. These fluids can powerfully dissipate heat generated during combustion, ya know? Furthermore, nanofluids are characterized as nanoparticles dispersed within a base fluid - they're ...  Read More

Study the impact of using chitosan for removing methyl orange dye from synthetic wastewater

Reem Ihsan Abdul Hadi; Abbas Kh. Mohammad

Articles in Press, Accepted Manuscript, Available Online from 27 December 2023

https://doi.org/10.30772/qjes.2023.144155.1044

Abstract
  The primary objective of this study is to investigate the effectiveness of chitosan powder as an adsorbent for treating industrial wastewater contaminated with methyl orange. Chitosan is generally known in many academic fields and is readily available at a reasonable cost. Chitosan is a biopolymer derived ...  Read More

Numerical study on the influence of louver design on VRF system thermal performance in enclosed spaces in Erbil city

Kawa Abdulghany Abdullah; Ramzi Raphael Ibraheem Barwari

Articles in Press, Accepted Manuscript, Available Online from 13 January 2024

https://doi.org/10.30772/qjes.2024.144970.1053

Abstract
  Variable Refrigerant Flow (VRF) systems are extensively employed for space heating and cooling, particularly in multi-story buildings where outdoor units are discreetly placed behind aluminum louvers for architectural considerations. However, these metal louvers can hinder ventilation and heat rejection ...  Read More

Experimental investigation of perforated multi-layered composite armor subjected to ballistic impact

Muhanad Mosa; Ali Fahem; Achyuth Thumbalam Guthai

Articles in Press, Accepted Manuscript, Available Online from 01 March 2024

https://doi.org/10.30772/qjes.2024.146005.1083

Abstract
  Ballistic protection of vehicles has become an important endeavor, as it is concerned with how occupants can possess a comfortable feeling together with a high level of protection during a shooting incident. In recent years, numerous forms of armor have employed several kinds of distinct materials to ...  Read More

Efficient Load Balancer for Local Internet Service Providers Based on Operation Research

Tariq M. Salman; Maher K. Mahmood Al-Azawi; Viktar Tsviatkou

Articles in Press, Accepted Manuscript, Available Online from 15 February 2024

https://doi.org/10.30772/qjes.2024.146016.1084

Abstract
  Load balancing in internet services acts as a reverse proxy to distribute network bandwidth or application traffic across a number of servers. The decrease of internet route cost calculated from the distance, number of hops, bandwidth capacity, equipment maintenance, power consumption ...etc. is needed ...  Read More

Improving the mechanical behavior of sustainable pervious concrete using polypropylene and waste rope fibers

Abeer Alkraway; Shereen Qasim Abdulridha; Mohammad Salah Nasr; Zaid Ali Hasan; Ali Shubbar

Articles in Press, Accepted Manuscript, Available Online from 25 February 2024

https://doi.org/10.30772/qjes.2024.146598.1114

Abstract
  Urbanization has led to the damage of infrastructure due to floods and water accumulation on roads and sidewalks. To address this problem, pervious concrete was designed to drain water smoothly. However, pervious concrete has certain drawbacks, such as brittleness and poor tensile strength. To overcome ...  Read More

An Improved Throttling Algorithm for Fog Computing Networks with an Additional Management Layer

Turkan Ahmed Khaleel; Omar Anwer Nafea

Articles in Press, Accepted Manuscript, Available Online from 26 February 2024

https://doi.org/10.30772/qjes.2024.146104.1089

Abstract
  An emerging networking technique called fog computing extends cloud computing capabilities to the edge network's borders. It is employed to get around the limitations of cloud computing, like latency and bandwidth problems. Fog computing is suitable for IoT systems and applications that require ...  Read More