Digital Commons Network^™

Effect Of 3d Printing Parameters On The Fatigue Properties Of Parts Manufactured By Fused Filament Fabrication: A Review, Hamed Bakhtiari, Muhammad Aamir, Majid Tolouei-Rad

Research outputs 2022 to 2026

The advancement in 3D printing techniques has raised the hope to use additively manufactured parts as final products in various industries. However, due to the layer-by-layer nature of AM parts, they are highly susceptible to failure when they are subjected to fatigue loading. This review provides a detailed account of the influence of 3D printing parameters on the fatigue properties of parts manufactured by fused filament fabrication (FFF). Existing standards for fatigue testing of polymers and their limitation for 3D-printed parts are discussed. In addition, the cyclic behaviour of polymers is reviewed, and the impact of 3D printing parameters on …

Improved Rate Of Secret Key Generation Using Passive Re-Configurable Intelligent Surfaces For Vehicular Networks, Hina Ayaz, Muhammad Waqas, Ghulam Abbas, Ziaul Haq Abbas, Muhammad Bilal, Kyung-Sup Kwak

Research outputs 2022 to 2026

The reconfigurable intelligent surfaces (RIS) is a new technology that can be utilized to provide security to vehicle-to-vehicle (V2V) communications at the physical layer. In this paper, we achieve a higher key generation rate for V2V communications at lower cost and computational complexity. We investigate the use of a passive RIS as a relay, to introduce channel diversity and increase the key generation rate (KGR), accordingly. In this regard, we consider the subsets of consecutive reflecting elements instead of the RIS as a whole in a time slot, i.e., instead of a single reflector, the subsets of reflectors are utilized …

Skin-Derived Abcb5+ Mesenchymal Stem Cells For High-Medical-Need Inflammatory Diseases: From Discovery To Entering Clinical Routine, Elke Niebergall-Roth, Natasha Y. Frank, Christoph Ganss, Markus H. Frank, Mark A. Kluth

Research outputs 2022 to 2026

The ATP-binding cassette superfamily member ABCB5 identifies a subset of skin-resident mesenchymal stem cells (MSCs) that exhibit potent immunomodulatory and wound healing-promoting capacities along with superior homing ability. The ABCB5+ MSCs can be easily accessed from discarded skin samples, expanded, and delivered as a highly homogenous medicinal product with standardized potency. A range of preclinical studies has suggested therapeutic efficacy of ABCB5+ MSCs in a variety of currently uncurable skin and non-skin inflammatory diseases, which has been substantiated thus far by distinct clinical trials in chronic skin wounds or recessive dystrophic epidermolysis bullosa. Therefore, skin-derived ABCB5+ MSCs have the potential …

The Benefits To Bone Health In Children And Pre-School Children With Additional Exercise Interventions: A Systematic Review And Meta-Analysis, Callum Mccaskie, Aris Siafarikas, Jodie Cochrane Wilkie, Vanessa Sutton, Paola Chivers, Nicolas H. Hart, Myles C. Murphy

Research outputs 2022 to 2026

Objective: Determine if exercise interventions, beyond what is already provided to children and preschool children, improve bone health and reduce fracture incidence. Design: Systematic review and meta-analysis reported using the PRISMA guidelines. Certainty of evidence was assessed using GRADE recommendations. Data sources: Five electronic databases were searched for records: PUBMED; CINAHL; CENTRAL; SPORTDiscus; Web of Science. Eligibility criteria for selecting studies: Randomised, quasi-randomised and non-randomised controlled trials (including cluster-randomised) assessing the impact of additional exercise interventions (e.g., increased physical education classes or specific jumping programs) on bone health in children (6 – 12 years) and pre-school children (2 – 5 …

Summary Of Alcohol And Drug Treatment For Aboriginal And Torres Strait Islander Peoples, Australian Indigenous Healthinfonet

Research outputs 2022 to 2026

This summary is based on the Review of alcohol and drug treatment for Aboriginal and Torres Strait Islander peoples. It provides an overview of the available evidence for treatment approaches to help a person reduce or stop substance use. These are treatments for when a person has evidence of either hazardous use or problem alcohol and other drug (AOD) use (see Box 1 for terms used). Some approaches to address substance use are not included in this summary (e.g. for tobacco cessation or volatile substance use). This summary presents information on:

• the available research and other evidence that underpins …

A Systematic Review Of Literature On Occupational Health And Safety Interventions For Older Workers, Tim Bentley, Leigh-Ann Onnis, Alexis Vassiley, Ben Farr-Wharton, Carlo Caponecchia, Catherine Andrew, Sharron O’Neill, Abilio De Almeida Neto, Vanessa Huron, Nicola Green

Research outputs 2022 to 2026

As the global population ages there is an imperative to enhance labour participation of older workers in ways that support good physical and psychological health. However, there is limited guidance for organisations on how to do this effectively. This systematic review examined literature identified through four databases and a targeted web-search, yielding 39 PRISMA records (32 scholarly, seven grey literature) reporting workplace interventions aimed at improving the injury outcomes of older workers. The review revealed that organisational and composite interventions may be most effective, although an absence of robust research in this area and a scarcity of empirical evidence-based interventions …

Social Media And English Language Writing Performances Of A Ghanaian Esl Class: The Nexus, Ramos Asafo-Adjei, Ronald Osei Mensah, Ernest Kwesi Klu, Enock Swanzy-Impraim

Research outputs 2022 to 2026

The nexus among social media usage and the English language writing performances of a Ghanaian English as Second Language (ESL) class was investigated in this enquiry. The simple qualitative case study design was used, and the data was collected from a co-educational government secondary school Form 2 General Arts One class in Ghana. A focus group discussion (FGD) guide was employed to elicit the data, and the data were synthesised and analysed using the Data Analysis Spiral. It was evidenced that social media has adversely impacted the students’ English Language learning, as oblivious and non-standard contents have been smuggled into …

Student Evaluation Of Teaching: Reactions Of Australian Academics To Anonymous Non-Constructive Student Commentary, Marie Hutchinson, Rosanne Coutts, Debbie Massey, Dima Nasrawi, Jann Fielden, Megan Lee, Richard Lakeman

Research outputs 2022 to 2026

Within Australian higher education, student evaluation of teaching (SET) is regularly conducted and data are utilised for quality control and staff appraisal. Within current methodologies, students can anonymously provide further feedback as written commentary. There is now growing evidence that, once this narrative becomes derogatory or abusive, it may have the potential to create harm. To investigate staff reactions to receiving anonymous non-constructive commentary, a one group point in time design was constructed, and a survey conducted. Participants (N = 741) from a broad cross-section of Australian universities responded to Likert questions asking about their reactions. A significant impact was …

The Landscape Of Public Procurement Research: A Bibliometric Analysis And Topic Modelling Based On Scopus, Abderahman Rejeb, Karim Rejeb, Andrea Appolloni, Yasanur Kayikci, Mohammad Iranmanesh

Research outputs 2022 to 2026

Purpose: The purpose of this study is to investigate the structure and dynamics of academic articles relating to public procurement (PP) in the period 1984–2022 (up to May). The researchers also intend to analyse how this knowledge domain has grown since 1984. Design/methodology/approach: A bibliometric analysis was carried out to examine the existing state of PP research. Based on 640 journal articles indexed in the Scopus database and written by 1,247 authors over nearly four decades, a bibliometric analysis was conducted to reveal the intellectual structure of academic works pertaining to PP. Findings: Findings reveal that PP research from Scopus …

Student Access To Higher Education Through Alternative Pathways And Differences By Equity Group And Discipline, Denise Jackson, Ian Li, David Carroll

Research outputs 2022 to 2026

Widening participation in higher education for under-represented groups is a priority internationally. In Australia, the most common entry pathway for domestic undergraduate students is by obtaining an Australian Tertiary Admission Rank (ATAR) in the final year of secondary school. The ATAR system, however, has been criticised as disadvantaging certain equity groups. Consequently, widening participation policy has encouraged alternative entry pathways into university, including enabling/bridging courses, vocational education qualifications, or portfolio entry based on demonstrated skills and experience. There is, however, relatively scarce evidence of student use of these pathways, including those from equity groups. Drawing on national enrolment data and …

Tourism And Final Wish Making: The Discourse Of Terminal Illness And Travel, Gregory Willson, A. J. Mcintosh, C. Cockburn-Wootten

Research outputs 2022 to 2026

This paper identifies a new discourse about tourism, that of final wish making. The website communications of charitable foundations whose dedicated purpose is to grant final wishes for adults with a terminal illness and their families were examined using critical discourse analysis. Specifically, the aim of this study was to understand how these charitable organisations construct, communicate and mediate meanings around terminal illness and travel for these individuals. Our study found that, promoted as a final wish in one’s life, tourism is framed as a transformational concept that is beneficial in the imminent time before death, as a legacy for …

Incorporation Of Community Resources In Teaching Social Studies In Junior High Schools: A Case In The Adentan District Of The Greater Accra Region Of Ghana, Ronald Osei Mensah, Enock Swanzy-Impraim, Da-Costa Marfo, Pearl Adiza Babah

Research outputs 2022 to 2026

Social studies education constitutes a diverse aspect of the human ecosystem that needs external resources to enable effective tuition and learning in the classroom. Using external resources has been a significant challenge for Ghana’s junior high school teachers. Given this, the study explored the integration of community resources in teaching social studies in a selected junior high school in the Adentan District in the Greater Accra Region of Ghana. It investigated the factors that militate against using community resources and assessed how these problems could be resolved. The study made use of the random sampling technique, with a sample size …

‘Male Circumcision’ And ‘Female Genital Mutilation’: Why Parents Choose The Procedures And The Case For Gender Bias In Medical Nomenclature, James L. Nuzzo

Research outputs 2022 to 2026

Cutting of boys’ and girls’ genitalia is a debated human rights topic. Here, the first aim was to summarise why parents choose to have these procedures performed on their children. Results from 22 survey studies on ‘male circumcision’ and 27 studies on ‘female genital mutilation’ revealed that non-medical reasons, such as tradition, are prominent in the decisions for both procedures. The second aim was to describe researchers’ use of medical words (i.e. ‘circumcision’) and non-medical words (i.e. ‘cutting’, ‘mutilation’) when referring to these procedures. Relevant phrases were searched in titles and abstracts of articles indexed in PubMed. Total article count …

Editorial: Viral Infection, Tumor Development And Host Immune Response, Xin Li, Liwei An, Yucui Jin, Jun Gui, Weitao Lin, Zhenke Wen, Muzaffer Ahmad Kassab, Jie Chen

Research outputs 2022 to 2026

Cancer is a devastating disease that remains a leading cause of death worldwide. According to recent statistics, cancer was responsible for 10 million deaths in 2020 alone (Ferlay et al., 2021). Of these cases, viral infections associated cancers have been found to contribute to a significant proportion, with chronic infections such as hepatitis B and C viruses (HBV and HCV), human papillomavirus (HPV), Epstein-Barr virus (EBV), and Human immunodeficiency virus (HIV) being particularly noteworthy. Inflammation and immune response are also closely linked to tumorigenesis, making it crucial to understand how viral infections and host immune response contribute to cancer development …

Development And Validation Of The Montreal Cognitive Assessment For People With Hearing Impairment (Moca-H), Piers Dawes, David Reeves, Wai Kent Yeung, Fiona Holland, Anna Pavlina Charalambous, Mathieu Côté, Renaud David, Catherine Helmer, Robert Laforce, Ralph N. Martins, Antonis Politis, Annie Pye, Gregor Russell, Saima Sheikh, Marie-Josée Sirois, Hamid R. Sohrabi, Chyrssoula Thodi, Kathleen Gallant, Ziad Nasreddine, Iracema Leroi

Research outputs 2022 to 2026

Background: Hearing impairment is common among older adults and affects cognitive assessments for identification of dementia which rely on good hearing function. We developed and validated a version of the Montreal Cognitive Assessment (MoCA) for people with hearing impairment. Methods: We adapted existing MoCA 8.1 items for people with hearing impairment by presenting instructions and stimuli in written rather than spoken format. One Attention domain and two Language domain items required substitution by alternative items. Three and four candidate items respectively were constructed and field-tested along with the items adapted to written form. We used a combination of individual item …

Outdoor Commercial Buildings: A Cfd Study Of The Impact Of Streets Layout On Airflow., Basma Maged, Bakr Gomaa, Alaa Sarhan

Mansoura Engineering Journal

The impact of the general layout of commercial streets and their orientation relative to prevailing wind direction on urban comfort due to natural ventilation is unknown. To study the natural airflow pattern in the commercial street mall, this research investigates the impact of different building layouts on airflow characteristics. To do this we conduct a parametric CFD simulation for 12 simulation cases, in which the commercial street layout changes to include secondary streets in four different cases. All cases are also subjected to three different wind directions. The study highlights that different wind orientations can significantly impact pedestrian comfort in …

Microstrip Antenna Design Using Cst Optimized By Neural Network Algorithm, Hadeer. A Shoeab, Mohamed A.Mohamed, Marzouk El Said A, Ahmed. A. Kabeel

Mansoura Engineering Journal

In this paper, a general design procedure is suggested for the microstrip antennas using artificial neural networks and this is demonstrated using the rectangular patch geometry. The model was analyzed for 1733 data sets of input output parameters. 1300 samples for training and 433 samples for testing and 1500 epoch, learning rate from (0.003 to 0.005). Python was used to create and implement the ANN algorithm model. The mean error in detection of resonance frequencies (return loss peaks) was 0.144GHz on train set, and 0.116GHz on test set. The outputs of the radial basis function are optimized by varying the …

Uses Of Geographic Information Systems And Remote Sensing To Study The Natural Resource Management Of The Red Sea Governorate, Egypt, Shrouk Galal, Fawzi Hamid Zarzoura, Mahmoud El-Mewafi

Mansoura Engineering Journal

The Red Sea governorate is rich in natural resources that create challenges for Egypt's future economy and growth. The right ways must be found to manage and discover these resources without wasting them. Remote sensing is one of the best methods used in the development of natural resources. It is based on measuring electromagnetic ray reflections from deep-seated or dispersed natural resources, and these images are processed uniquely for a variety of applications, including the detection of minerals, making land cover maps, shifting rocks, and monitoring of geological distortions. The altered rocks that existed in the study area were identified …

Effects Of Power Stations Emissions On Air Quality In Kuwait, Abdullah F.M. Al-Rukaibi, I. G. Rashed, M.M. El-Halwany, O. Hamed

Mansoura Engineering Journal

The research describes the Gaussian plume model used to estimate the concentration of pollutants emitted from power plants and dispersed in the atmosphere. The object of the research is to compare the air quality between areas which is near to source station and away from the source station. The research estimates the concentrations of pollutants released from six electric power stations in Kuwait using the Gaussian plume model. A power plant with a stack height of 100 m, stack diameter of 2 m, and an emission rate of 1 kg/s for each station is considered. The Pasquill-Gifford stability categories are …

Design And Analysis Of Advanced Low Power Consumption Hybrid Switch With Experimental Verification, A. Hussein, M. Abd-Elazzem, M. Abo-Elsoud, Mahmoud M. Saafan

Mansoura Engineering Journal

This paper presents a hardware implementation for a hybrid switch (HS) that can be used successfully as a fast switch in industrial power factor correction (PFC) panels and for electrical transformers. The main components of HS are a semiconductor switch as Silicon Controlled Rectifier (SCR) or thyristor and a mechanical switch as a relay. In the conventional PFC solution, the correction process is based on traditional electromagnetic contactors so, a huge current will appear during the turn-on operation In addition there is frequently a spark. Due to the parallel technique between SCR and latched relay, the proposed HS can inhibit …

Multi-Objective Approach For Optimizing Buildings’ Forms And Kinetic Façades Systems In Office Buildings, Randa Mohamed Ahmed Mahmoud

Mansoura Engineering Journal

Due to the critical reliance of office buildings on wide-glazed areas for providing daylight which increases heat gain, the kinetic façades (KF) have been innovated to improve buildings’ envelopes. This study proposed a parametric computational methodology to optimize building forms and the KF system of office buildings cooperatively. The computational methodology was implemented by using Rhinoceros software and consists of 4 phases. The main aim is to improve the annual energy consumption, average daylight factor, and payback period, and the results concluded a significant improvement after applying the KF system by 1050.3 kWh/m2, 17.34%, and 6.8 years, respectively. Building parameters …

Comparison Between Different Codes In Design Cold-Formed Steel Lipped Channel Section Subjected To Axial Load Or Bending Moment, Samar El-Sayed Ibrahim Atya, Ahmed Hussain Ali Abdelrahman, Fikry Abdo Salem, Nabil Sayed Mahmoud, Mohamed Ghannam

Mansoura Engineering Journal

This paper presents a comparative analysis between Eurocode3 (EC3), the North American Specification (AISI), and the Egyptian Code of Practice (ECP-205) to design Cold-Formed Steel (CFS) compression and flexural members with channel profiles. The research recognizes similarities and variations in strength measures to facilitate the learning process in the design codes, as well as the expressions and limits provided in the ECP, EC3, and AISI design codes. A computer program was designed to improve the speed of the calculation process. The software was created utilizing the C+ programming language and was programmed to calculate the axial load and bending moment …

Indoor Pedestrian Navigation Using Pdr/Wi-Fi Integration, Ahmad Yhaya, Ehab H. Abdelhay, Mohammed A. H. Abozied, Ahmed Shaaban Samra

Mansoura Engineering Journal

Positioning of pedestrians is a challenging problem. Especially, in case of global positioning system (GPS) signal outage inside buildings. The inertial navigation system (INS) systems are always used to detect the motion of the human body by placing inertial measurement unit (IMU) in a specific part of the human body. However, using IMU alone will not produce proper navigation solution with sufficient accuracy due to gradually accumulated errors of IMU stochastic drift, noise, and state integration with time. Which lead the recent researchers to enhance the performance of indoor navigation systems using aiding sources such as received signal strength (RSS) …

Video Anomaly Detection Using Residual Autoencoder: A Lightweight Framework, Mohamed H. Habeb, May A. Salama, Lamiaa A. Elrefaei

Mansoura Engineering Journal

This paper proposes an efficient lightweight deep spatial residual autoencoder (SRAE) model to detect anomalous events in video surveillance systems. A lightweight network is essential in real-time situations where time is critical. Moreover, it could be deployed on low-resource devices like embedded systems or mobile devices. This makes it a very useful option for real-world situations where there may be a shortage of resources. The proposed network is composed of a 3-layer residual encoder-decoder architecture that is adopted to acquire the salient spatial characteristics representative of normal events in videos. Then, the reconstruction loss is used to find abnormalities, where …

A Methodological Framework For Setting Up The Urban Observatory For Informed Cities (Case Study: El Tor City, South Sinai, Egypt), Eman Metwally, Enas Samir

Mansoura Engineering Journal

Cities are now more than ever seen as crucial to addressing global issues. They have been repeatedly identified as key locations to address the interrelated environmental, health and social issues affecting our increasingly civilized planet. Many global agreements and frameworks, including the 2030 Agenda for Sustainable Development (2015) and the New Urban Agenda (2016) and developing data and information, have certainly emerged as an increasingly critical element in how we think, experience and ultimately manage cities. We produce more urban data than ever before, through a variety of formal and informal knowledge mobilization channels, but this is not always accessible …

A Scoping Review Of Nurse-Led Randomised Controlled Trials, Marion Eckert, Kate Kennedy, Kim Neylon, Claire M. Rickard, Samantha Keogh, Richard Gray, Sandy Middleton, Caroline Homer, Lisa Whitehead, Greg Sharplin

Research outputs 2022 to 2026

Background: Nurses comprise the largest portion of the healthcare workforce worldwide. However, nurse representation in the leadership of clinical research and research funding is largely unknown. The Australasian Nursing and Midwifery Clinical Trials Network was established to provide a coordinated network, focussed on building research capacity in nursing and midwifery. To support this work, this scoping review of nurse-led randomised controlled trials was conducted to summarise research activity, as well as highlight future research directions, gaps and resources. Midwife-led trials will be reported elsewhere. Aim: To quantify number, type and quality of nurse-led randomised controlled trials registered between 2000–2021. Design: …

Natural Manganese Ores For Efficient Removal Of Organic Pollutants Via Catalytic Peroxymonosulfate-Based Advanced Oxidation Processes, Zhengxin Yao, Roufei Chen, Ning Han, Hongqi Sun, Ngie Hing Wong, Lusi Ernawati, Shaobin Wang, Jaka Sunarso, Shaomin Liu

Research outputs 2022 to 2026

Peroxymonosulfate-based advanced oxidation processes (PMS-AOPs) for in situ persistent organic pollutant (POP) remediation in aqueous solutions can be a promising technology. However, this technology is constrained by its high toxicity and cost of metal oxide and non-metal catalysts for PMS activation. Here, we investigated the catalytic performance of a widely available natural mineral, manganese ore (MO), for PMS activation. A series of natural MO samples in an aqueous solution were prepared via the Fenton-like reaction. The samples' crystalline structure, surface morphology, textural properties, and other surface characteristics of the selected MO were systematically characterized. The effects of PMS concentration and …

European Epidemiological Patterns Of Cannabis- And Substance-Related Congenital Neurological Anomalies: Geospatiotemporal And Causal Inferential Study, Albert Stuart Reece, Gary Kenneth Hulse

Research outputs 2022 to 2026

Introduction: Of the many congenital anomalies (CAs) recently linked with community cannabis exposure, arguably the most concerning are neurological CAs (NCAs). We therefore conducted a detailed study of this in fourteen European nations.

Methods. Congenital anomaly data were from Eurocat. Drug exposure data were from European Monitoring Centre for Drugs and Drug Addiction. Income from World bank.

Results: The Netherlands, Spain, France and Bulgaria reported increasing rates of many NCAs. The NCA rate (NCAR) was: severe microcephaly 2.14 x 1013 higher in nations with increasing daily cannabis use when compared to those without (p = 0.0204, minimum E-value (mEV) = …

Chatgpt In Higher Education: Considerations For Academic Integrity And Student Learning, Miriam Sullivan, Andrew Kelly, Paul Mclaughlan

Research outputs 2022 to 2026

The release of ChatGPT has sparked significant academic integrity concerns in higher education. However, some commentators have pointed out that generative artificial intelligence (AI) tools such as ChatGPT can enhance student learning, and consequently, academics should adapt their teaching and assessment practices to embrace the new reality of living, working, and studying in a world where AI is freely available. Despite this important debate, there has been very little academic literature published on ChatGPT and other generative AI tools. This article uses content analysis to examine news articles (N=100) about how ChatGPT is disrupting higher education, concentrating specifically on Australia, …

Women’S Views On Obstetric Fistula Risk Factors And Prevention In North-Central Nigeria: An Interpretive Descriptive Study, Lydia Babatunde Bulndi, Deborah Ireson, Esther Adama, Sara Bayes

Research outputs 2022 to 2026

Objective: Obstetric fistula, also known as vesicovaginal fistula or rectovaginal fistula, is an abnormal opening between the vagina and rectum caused by prolonged obstructed labour that causes substantial long-term harm to women. It is most prevalent in low resource settings and although preventative measures have been proposed, they have not, to date, taken women’s own views into account. The objective of this study was to explore the views of North Nigerian women on obstetric fistula risk factors and prevention.

Design: This study was conducted using Interpretive Description methodology, which is a qualitative approach underpinned by Symbolic Interactionism. A semistructured questionnaire …