Ahmed A Moustafa

Ahmed A Moustafa
Bond University · Psychology Clinic

PhD
Data Analytics, Machine Learning, Mental Health. Please, email me if you want to get in touch. I rarely login here

About

457
Publications
96,589
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
7,348
Citations

Publications

Publications (457)
Article
Full-text available
Background Gastric antral vascular ectasia (GAVE) is an uncommon but important cause of gastrointestinal bleeding in cirrhotic patients. Argon plasma coagulation (APC) is the standard therapy for GAVE. Endoscopic band ligation (EBL) is an emerging, safe and effective treatment for GAVE. The best way of applying EBL in the management of GAVE is not...
Article
Digital self-harm (DSH) is a relatively new form of virtual self-harm that occurs mostly in young people, and has been defined as both the act of cyberbullying oneself (Fictitious Online Victimisation; FOV), and engaging with online spaces in a way that is detrimental to one’s psychological wellbeing. In our overview of DSH we aim to provide an und...
Article
In the last two decades, advancements in artificial intelligence and data science have attracted researchers' attention to machine learning. Growing interests in applying machine learning algorithms can be observed in different scientific areas, including behavioral sciences. However, most of the research conducted in this area applied machine lear...
Article
Full-text available
Purpose Diabetes mellitus (DM) increases the risk of morbidity and mortality after liver resection. Albuminuria is associated with a higher risk for all-cause and cardiovascular mortality. This study evaluated albuminuria as a predictor of the outcome of living donor liver transplantation (LDLT) in patients with pre-existing DM. Methods This retro...
Article
Full-text available
Background Obesity is a risk factor for cholelithiasis. Besides, rapid weight loss after bariatric surgery upsurges the rate of cholelithiasis and acute cholecystitis. This study aimed to compare gallstone development frequency after LSG under ursodeoxycholic acid (UDCA) prophylaxis. Methods This prospective controlled study included 332 patients...
Article
Full-text available
Background While event-based prospective memory refers to enacting intending action in response to a specific event or cue (“e.g., When I tell you there are 10 minutes left, please give me this stopwatch”), time-based prospective memory refers to enacting intending action in relation to a specific time (“In 10 minutes time, please ask me for a penc...
Article
Full-text available
The degree to which people take advice, and the factors that influence advice-taking, are of broad interest to laypersons, professionals, and policy-makers. This meta-analysis on 346 effect sizes from 129 independent datasets ( N = 17, 296) assessed the weight of advice in the judge-advisor system paradigm, as well as the influence of sample and ta...
Article
Full-text available
The aim of the present study is to conduct a dimensional investigation of personality disorder traits based on the three-dimensional model of personality self-regulation (TDMPS). This model includes the following three basic elements for self-regulation: self-control, self-knowledge/mindfulness, and self-compassion. A total of 432 university studen...
Article
Full-text available
Heroin is highly addictive drug that users use in spite of its negative consequences. Many research on drug dependence, persistence and relapse confirmed that there is a relationship between drug addiction and negative mood states. The present review article investigated the relationship between depression, negative mood, and drug abuse. In additio...
Article
Full-text available
Anger and aggression have large impact on people’s safety and the society at large. In order to provide an intervention to minimise aggressive behaviours, it is important to understand the neural and cognitive aspects of anger and aggression. In this systematic review, we investigate the cognitive and neural aspects of anger-related processes, incl...
Article
Full-text available
Vitamin D deficiency has been reported in several cultures and regions, including the Middle East, North Europe, and Australia. In this review, we summarize and discuss existing studies on factors underlying vitamin D deficiency across different regions. In particular, we explain key roles played by lifestyle, including sun exposure, season change,...
Article
Full-text available
Purpose Obesity is associated with fat accumulation in ectopic sites such as the pancreas, the so-called pancreatic steatosis (PS). Bariatric surgery has been shown to be associated with reducing pancreatic fat. This study investigated the effect of laparoscopic sleeve gastrectomy (LSG) on pancreatic volume and its fat content and glucose homeostas...
Article
Full-text available
Background: There is a recent interest in pupil dilation during the retrieval of autobiographical memory. We pursued this line of research by measuring pupil diameter during the retrieval of self-defining memories, that is, memories that are highly vivid, emotionally intense, and are retrieved to reflect enduring concerns in a person's life. Meth...
Article
Full-text available
The COVID-19 pandemic has contributed to an increase in psychological distress. However, protective factors such as social support, psychological flexibility, and coping mechanisms can help individuals cope with the effects of psychological distress. This study aimed to test a recent hypothesis suggesting that psychological flexibility is not neces...
Article
Full-text available
Background Low caloric diet can reduce liver volume; however, there is no consensus regarding preoperative weight reduction before bariatric surgery. This study evaluates the effect of preoperative very-lowcalorie diet (VLCD) in patients undergoing laparoscopic sleeve gastrectomy (LSG). Methods This prospective study included patients scheduled fo...
Article
Recent studies have shown that alpha oscillations (8–13 Hz) enable the decoding of auditory spatial attention. Inspired by sparse coding in cortical neurons, we propose a spiking neural network model for auditory spatial attention detection. The proposed model can extract the patterns of recorded EEG of leftward and rightward attention, independent...
Article
Full-text available
Background: Dementia with Lewy bodies (DLB) is a common cause of dementia with poor prognosis and high hospitalization rates. DLB is frequently misdiagnosed, with clinical features that overlap significantly with other diseases including Parkinson's disease (PD). Clinical instruments that discriminate and track the progression of cognitive impairm...
Article
Periodontal regeneration aims are restoring of the destructed bone, cementum and periodontal ligament. The new strategies of regeneration is very challenging, one of these strategies is tissue engineering, including stem cells and it's considered very promising solution. This paper aims to review the use of stem cells for the treatment of peri-impl...
Article
Full-text available
MicroRNAs (miRNAs) are small non-coding RNAs that play critical roles in gene expression, cell differentiation, and immunity against viral infections. In this study, we have used the computational tools, RNA22, RNAhybrid, and miRanda, to predict the microRNA-mRNA binding sites to find the putative microRNAs playing role in the host response to infl...
Article
Full-text available
Purpose Secondary hyperparathyroidism (SHPT) is linked to obesity. Bariatric surgery may be associated with calcium and vitamin D deficiencies leading to SHPT. This study aimed to detect the prevalence of SHPT before and after bariatric surgery. Methods This prospective study assessed the prevalence of SHPT after sleeve gastrectomy (SG, n = 38) co...
Article
Full-text available
Creativity is related to finding novel, surprising, and useful solutions. We argue that creative cognitive processes, divergent thinking, abstraction, and improvisation, are constructed on different novelty-based processes. The prefrontal cortex plays a role in creative ideation by providing a control mechanism. Thinking about novel solutions activ...
Article
A new Monte Carlo model of optical photon transport has been developed for application to scintillation pillars with side surfaces modeled using their measured 3D topography. The model addresses deficiencies of existing models specifically pertinent to high aspect ratio scintillator geometries. Inaccuracies with these models’ description of the ref...
Article
Full-text available
Purpose Bariatric surgery is evolving as a successful tool for managing morbid obesity and T2DM. This study aimed to identify predictors of diabetes remission after two types of bariatric procedures. Methods This prospective study enrolled 172 patients with morbid obesity associated with T2DM scheduled for bariatric surgery. Two laparoscopic baria...
Article
Full-text available
A spiking neural network model inspired by synaptic pruning is developed and trained to extract features of hand-written digits. The network is composed of three spiking neural layers and one output neuron whose firing rate is used for classification. The model detects and collects the geometric features of the images from the Modified National Ins...
Article
Full-text available
It is well established that pupil activity indexes cognitive processing. For instance, research has consistently demonstrated that the pupil reacts to working memory span task performance. However, little is known about pupil reaction to cognitive processing in Alzheimer's Disease (AD). We thus investigated whether span tasks can modulate pupil siz...
Article
Full-text available
To help address the increasing challenges related to the provision of dementia care, dementia registries have emerged around the world as important tools to gain insights and a better understanding of the disease process. Dementia registries provide a valuable source of standardized data collected from a large number of patients. This review explor...
Article
Full-text available
A large body of research attributes learning deficits in schizophrenia (SZ) to the systems involved in value representation (prefrontal cortex, PFC) and reinforcement learning (basal ganglia, BG) as well as to the compromised connectivity of these regions. In this study, we employed learning tasks hypothesized to probe the function and interaction...
Article
Full-text available
Many studies on the drift-diffusion model (DDM) explain decision-making based on a unified analysis of both accuracy and response times. This review provides an in-depth account of the recent advances in DDM research which ground different DDM parameters on several brain areas, including the cortex and basal ganglia. Furthermore, we discuss the cha...
Chapter
In the next 30 years, Alzheimer’s disease cases are predicted to drastically increase. Consequently, there is a critical need for research that can counteract the increasing number of Alzheimer’s disease patients. However, current methods of Alzheimer’s disease research have significant limitations. For example, Alzheimer’s disease research is ofte...
Chapter
Several studies have shown that depression is a risk factor for the development of Alzheimer’s disease. Further, depressive symptoms can increase symptom severity (e.g., memory decline and executive dysfunction) and reduce the quality of life in patients with Alzheimer’s disease. Accordingly, this chapter attempts to review existing literature on s...
Chapter
In this review, we discuss human and animal studies on how vitamin D deficiency can lead to brain disorders such as Alzheimer’s disease (AD). Unlike other reviews in this area, we further discuss the neural and cognitive correlates associated with vitamin D deficiency, which eventually lead to several AD symptoms. In addition, we also discuss how s...
Chapter
In this article, we review prior studies that analyze the relationship between stress, anxiety, depression, and dementia. We evaluate anxiety as a risk factor for dementia, its prevalence within different types of dementia, and anxiety in early versus late stages of dementia. In addition, we discuss the role of psychological stress in the developme...
Chapter
While many prior studies and reviews focus on investigating the role of the hippocampus and cerebral cortex in memory formation and retrieval and how they are impacted by Alzheimer’s disease, other brain regions did not receive the same attention. Accordingly, in this chapter, we review various studies that discuss the impact of Alzheimer’s disease...
Chapter
Objectives Since pharmacological interventions for behavioral and psychological symptoms of dementia are problematic, there is an increasing interest in nonpharmacological interventions such as music as a first-line treatment. However, the effects of music listening on people with dementia are not universally positive. This chapter reports on the d...
Chapter
Alzheimer’s disease (AD) is one of the most common neurological disorders, affecting mostly older adults. Although there are several treatments for AD, cholinesterase inhibitors are the most common treatment used. In this chapter, we discuss the safety and efficacy of donepezil, which is one of the oldest and most popular cholinesterase inhibitors....
Chapter
This chapter reviews prior studies on the use of music therapy and music interventions that do not involve a trained music therapist to manage the behavioral and psychological symptoms of dementia, including depression, stress, and anxiety. Here, we show that music therapy is not a monolithic term, as it involves different practices, such as listen...
Chapter
In this article, we discuss operational aspects of deep learning solutions for Alzheimer’s disease. First, we introduce clinical and neural aspects of Alzheimer’s disease. After that, we discuss traditional computer-aided diagnosis methods, such as support vector machines, random forests, and logistic regressions, which use statistical and machine...
Chapter
Untreated depression in dementia is associated with increased mortality, accelerated cognitive decline, earlier nursing home placement, and decreased quality of life. Thus it is important to accurately measure and treat depression in dementia. This chapter summarizes, discusses, and compares the several existing scales that measure depression in Al...
Chapter
This article discusses psychological and clinical studies of depression as comorbid to different dementias and mild cognitive impairment (MCI). First, we summarize studies on the diagnosis and prevalence of depression in dementia patients; we will show that there are different ways of diagnosing depression in dementia, leading to some conflicting f...
Chapter
The pupil size is not only influenced by light, but also by cognitive effort and research has consistently demonstrated how pupil size can index cognitive effort in nonpathological population. We thus offer an original case study in which we evaluate whether pupil dilation can index cognitive processing in a patient with Alzheimer’s disease (AD). W...
Chapter
Cybercriminals can attack either network systems (using password attacks, IP address spoofing, or traffic interception methods) or attack the minds of computer system users (using social engineering techniques). There have been only a few studies on developing detection systems against social engineering, as most anomaly and intrusion detection met...
Article
Full-text available
There is great body of evidence showing a relationship between childhood adversity and psychosis onset. Genetic factors moderate the association between childhood adversity and psychosis risk potentially by influencing biological and/or psychological reaction following exposure to adversity. In this review, we discuss studies identifying the specif...
Article
Full-text available
Schizophrenia spectrum disorders (SZ) are characterized by impairments in probabilistic reinforcement learning (RL), which is associated with dopaminergic circuitry encompassing the prefrontal cortex and basal ganglia. However, there are no studies examining dopaminergic genes with respect to probabilistic RL in SZ. Thus, the aim of our study was t...
Preprint
Understanding the psychosocial factors that positively and negatively impact on academic performance are important to help students succeed and persist within higher education. In this article, we conducted a systematic review to clarify and identify the psychosocial factors affecting university students’ academic performance. The initial search re...
Article
Full-text available
Background and study aims: To evaluate the impact of intraoperatively measured portal vein pressure (PVP) on mortality in non-cirrhotic bilharzial patients undergoing splenectomy. Methods: The present study is a prospective study that was conducted in Egypt from April 2014 to April 2018. Adult patients with non-cirrhotic bilharziasis who were sc...
Article
Full-text available
While there are many studies on pareidolia in healthy individuals and patients with schizophrenia, to our knowledge, there are no prior studies on pareidolia in patients with bipolar disorder. Accordingly, in this study, we, for the first time, measured pareidolia in patients with bipolar disorder (N = 50), and compared that to patients with schizo...
Article
Full-text available
In this article, we discuss the current state of psychological research with Indigenous peoples, with a specific focus on research including Aboriginal and Torres Strait Islander peoples of Australia and the Māori people of Aotearoa (New Zealand). We identify how the mental health of Indigenous people is often significantly poorer than non-Indigeno...
Article
While there is a multitude of studies on mild cognitive impairment (MCI; more than 80,000 articles), subjective memory complaints (SMC) have received less attention as a prodromal stage of Alzheimer’s disease (AD; less than 2000 articles). In this perspective review article, we argue that SMC should also be considered as another risk factor for the...
Article
Full-text available
This study investigated the impact of substance-addicted adolescents on family quality of life in the Arab country of Qatar. Two groups of families were compared: families with a teenager who had a substance addiction ( n = 50) and families without such a teen ( n = 53). Results showed families with a substance-addicted teenager had a lower family...
Preprint
Full-text available
The COVID-19 pandemic has impacted the mental health of many individuals and has caused global increases in psychological distress. Research has shown that social support, psychological flexibility, and coping mechanisms are important protective factors against psychological distress. However, recent evidence suggested that psychological flexibilit...
Article
Full-text available
A rapid increase in the number of patients with Alzheimer’s disease (AD) is expected over the next decades. Accordingly, there is a critical need for early-stage AD detection methods that can enable effective treatment strategies. In this study, we consider the ability of episodic-memory measures to predict mild cognitive impairment (MCI) to AD con...
Article
Full-text available
Background: This work endeavored to explore the effect of hypothyroidism on mortality in subjects with HCC who underwent living-donor liver transplantation (LDLT). Methods: This prospective study included 107 patients with HCC subjected to LDLT, divided into hypothyroid group (n=53) and euthyroid group (n=54). The primary objectives were overall...
Article
In this research, we aim to minimise the total cost of procuring multi-units of commodities. In classical procurement paradigms, the buyer is only aware of a limited number of sellers. This limited participation of sellers might lead to drop-in competition, which in turn, leads to higher procurement cost. In this regard, we propose a novel decentra...
Chapter
Ancient Egyptians’ significant progress lies in developments involving almost all parts of life and particularly gender equality. For more than seven millennia, the Ancient Egyptian civilization provided the roots from which humanity determined its legacy for equality between both genders without any discrimination. Sadly, after seven millennia, Eg...
Article
Full-text available
Self-defining memories (i.e., memories of self-relevant events) were found to be hampered by Alzheimer’s Disease (AD). We therefore investigated whether this decline can be alleviated with odor exposure. We invited individuals with mild AD and healthy controls to choose a preferred odor and to retrieve three autobiographical memories after exposure...
Chapter
Full-text available
Online discussion platforms require extracting the discussion structure in order to support understanding the flow of these discussions. Towards this end, this paper proposes an approach that performs node classification which is the first step towards extracting the structure of online discussions. In this regard, the proposed approach employs a g...
Article
Full-text available
Proteins are tiny players involved in the activation and deactivation of multiple signaling cascades through interactions in cells. The TNFR1 and MADD interact with each other and mediate downstream protein signaling pathways which cause neuronal cell death and Alzheimer’s disease. In the current study, a molecular docking approach was employed to...
Article
Objectives: Living donor liver transplant is the gold standard therapy for patients with terminal hepatic disorders for whom no alternative therapy is available. The primary aim was to assess different intraoperative factors that may predict early death after adult-to-adult living donor liver transplant. The secondary aim was to assess the effect...
Preprint
Full-text available
While there are many studies on pareidolia in healthy individuals and patients with schizophrenia, to our knowledge, there are no prior studies on pareidolia in patients with bipolar disorder. Accordingly, in this study, we, for the first time, measured pareidolia in patients with bipolar disorder (N = 50), and compared that to patients with schizo...
Article
Full-text available
In online discussion platforms, participants gather to discuss the effective approaches to solve the common issues they face. To facilitate these discussions proceeding smoothly and reaching consensus efficiently, human facilitators are introduced into these discussions. However, human facilitator-related problems such as human bias and scalability...
Article
Full-text available
Parkinson’s disease (PD), the second most common neurodegenerative disorder, is characterized by cardinal motor impairments, including akinesia and tremor, as well as by a host of non-motor symptoms, including both autonomic and cognitive dysfunction. PD is associated with a death of nigral dopaminergic neurons, as well as the pathological spread o...
Article
Full-text available
Information security has for long time been a field of study in computer science, software engineering, and information communications technology. The term ‘information security’ has recently been replaced with the more generic term cybersecurity. The goal of this paper is to show that, in addition to computer science studies, behavioural sciences...
Preprint
Recently, studies have shown that the alpha band (8-13 Hz) EEG signals enable the decoding of auditory spatial attention. However, deep learning methods typically requires a large amount of training data. Inspired by sparse coding in cortical neurons, we propose a spiking neural network model for auditory spatial attention detection. The model is c...
Article
Full-text available
We assessed depression in 72 patients with Alzheimer’s disease (AD) who live in retirement homes during the COVID-19-related lockdown. We invited caregivers of 72 patients with AD who live in retirement homes to rate depression in the patients both before and during the lockdown. Analysis demonstrated increased depression in the patients during the...
Article
Full-text available
Despite a large amount of research on depression and abuse, there is still a controversy on how abuse is measured and on childhood trauma’s effect on the physiological function of adults. Here, we attempt to clarify the relationship between different types of abuse and depression while focusing on childhood abuse. This article, unlike prior researc...
Preprint
Full-text available
The human brain recognizes hand-written digits by extracting the features from a few training samples that compose the digit image including horizontal, vertical, and orthogonal lines as well as full or semi-circles. In this study, we present a novel brain-inspired method to extract such features from handwritten digits images in the MNIST database...