12 results on '"M. A., Almutairi"'
Search Results
2. Effect of substrate temperature and precursor salt molarities on the nickel oxide physical properties
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F. M. M. Almutairi, N. Al-Khalli, N. B. Arkook, N. M. K. Sebhi, and M. S. Aida
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Atomic and Molecular Physics, and Optics - Published
- 2022
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3. An Efficient Signal Processing Algorithm for Detecting Abnormalities in EEG Signal Using CNN
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Thalakola Syamsundararao, A. Selvarani, R. Rathi, N. Vini Antony Grace, D. Selvaraj, Khalid M. A. Almutairi, Wadi B. Alonazi, K. S. A. Priyan, and Ramata Mosissa
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Epilepsy ,Article Subject ,Seizures ,Humans ,Electroencephalography ,Signal Processing, Computer-Assisted ,Radiology, Nuclear Medicine and imaging ,Algorithms - Abstract
Electroencephalography (EEG) is crucial for epilepsy detection; however, detecting abnormalities takes experience and knowledge. The electroencephalogram (EEG) is a technology that measures brain motion and represents the brain’s function. EEG is an effective instrument for deciphering the brain’s complicated activity. The information contained in the EEG signal pertains to the electric functioning of the brain. Neurologists have typically used direct visual inspection to detect epileptogenic abnormalities. This method is time-consuming, restricted by technical artifacts, produces varying findings depending on the reader’s level of experience, and is ineffective at detecting irregularities. As a result, developing automated algorithms for detecting anomalies in EEGs associated with epilepsy is critical. The construction of a novel class of convolutional neural networks (CNNs) for detecting aberrant waveforms and sensors in epilepsy EEGs is described in this research. In this study, EEG signals are analyzed using a convolutional neural network (CNN). For the automatic detection of abnormal and normal EEG indications, a novel deep one-dimensional convolutional neural network (1D CNN) model is suggested in this paper. The regular, pre-ictal, and seizure categories are detected using this approach. The proposed model achieves an accuracy of 85.48% and a reduced categorization error rate of 14.5%.
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- 2022
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4. The Prevalence of Depression among Medical Students: A Worldwide Literature Review
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Abdullah J. A. Alomran, Fawaz Majed Ata'Allah Sh Salman, Abboud Mohammad Alhussain, Salman S. S. S. S. A. Alazemi, Mohammad R. M. R. H. Alajmi, Bandar B. J. M. M. Almutairi, and Abdulaziz H. M. M. M. Alajmi
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education - Abstract
Stress is one of the main factors that might lead to depression in the long term; medical students are susceptible to stress and depression more than other students. Aim: to look at the prevalence of depression among medical students. Methodology: The authors looked at published studies on the internet about the depression rates among medical students in different areas around the world. Results: Most of the literature showed that there is a significant prevalence of depression among students during medical school. Conclusion: Due to high rates of depression among medical students, coping strategies for stress and depression should be offered to medical students to prevent future complications.
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- 2021
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5. The underrepresentation of females in antihypertensive medication over the years: a scoping review
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Z Mohseni-Alsalhi, M A M Vesseur, S A J S Laven, E W P Vaes, N Wilmes, D A M Meijs, E M Van Luik, C J R Dikovec, J Wiesenberg, M F Almutairi, E B N J Janssen, S De Haas, M E A Spaanderman, and C Ghossein-Doha
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Cardiology and Cardiovascular Medicine - Abstract
Background Hypertension is one of the leading global risk factors for cardiovascular disease-related morbidity and mortality. Females have historically been underrepresented in clinical trials resulting in presumed sex-related disparities in antihypertensive treatment effects. The past decade, widespread attention has been paid to this shortcoming aiming at increasing females' representation in clinical trials. Purpose To investigate whether in studies investigating the effect of antihypertensive drugs 1) the representation of females and 2) presentation of sex-stratified data has increased over the past decades. Methods We performed a scoping review after systematically searching PubMed and Embase for studies evaluating the effects of the five major groups of antihypertensive medication from inception (1945) until May 2020. The review was registered in Prospero database. Studies were only included if they 1) investigated one class of the five main groups of antihypertensive medications (beta-blockers, angiotensin converting enzyme inhibitors, angiotensin receptor blockers, calcium channel blockers, and diuretics, 2) human studies, 3) investigated adults ≥18 years of age, 4) were written in English or Dutch. We excluded articles if 1) only abstract was available and full report was not found, 2) unsuitable study design, 3) no reference group included, 4) outcome not related to cardiovascular health, 5) no registration of specific dose and duration information. The primary outcome was the proportion of included females over time, stratified per decade. The secondary outcome was whether sex-stratification was reported. Linear regression analysis with beta coefficient (β) and 95% CI was performed to explore the associations between the percentage of females included in the studies over time. Results The search strategy resulted in 73,867 potential articles. After study selection based on title/abstract and full text, 2,079 original studies were eligible for our study. These included 1,395,264 adults of which the mean percentage of females participating in all included studies was 27.9% (Figure 1, Table 1). The percentage of females participating in antihypertensive studies showed a slight increase each year by 0.4% (95% CI 0.36–0.53, P Conclusion Despite yearly increase in female participation in antihypertensive studies, females still only account for only one third of the study population. Moreover, less than 10% of studies report sex stratified data. Considering the global burden of hypertension, more differentiated sex-specific attention remains critically needed. Funding Acknowledgement Type of funding sources: None.
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- 2022
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6. Nature of Enhanced Brønsted Acidity Induced by Extraframework Aluminum in an Ultrastabilized Faujasite Zeolite: An In Situ NMR Study
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Emiel J. M. Hensen, Brahim Mezari, Pieter C. M. M. Magusin, Sami M. T. Almutairi, Evgeny A. Pidko, Inorganic Materials & Catalysis, and EIRES Chem. for Sustainable Energy Systems
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In situ ,chemistry.chemical_element ,02 engineering and technology ,engineering.material ,010402 general chemistry ,01 natural sciences ,Medicinal chemistry ,Article ,Coatings and Films ,chemistry.chemical_compound ,Energy(all) ,Aluminium ,Electronic ,Journal Article ,Optical and Magnetic Materials ,Physical and Theoretical Chemistry ,Zeolite ,Benzene ,Faujasite ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,Surfaces ,General Energy ,Deuterium ,chemistry ,engineering ,Sodalite ,0210 nano-technology ,Brønsted–Lowry acid–base theory - Abstract
The enhancing effect of extraframework Al (EFAl) species on the acidity of bridging hydroxyl groups in a steam-calcined faujasite zeolite (ultrastabilized Y, USY) was investigated by in situ monitoring the H/D exchange reaction between benzene and deuterated zeolites by 1H MAS NMR spectroscopy. This exchange reaction involves Brønsted acid sites (BAS) located in sodalite cages and supercages. In a reference faujasite zeolite free from EFAl, both populations of BAS are equally and relatively slowly reactive toward C6H6. In USY, in stark contrast, the H/D exchange of sodalite hydroxyl groups is significantly faster than that of hydroxyl groups located in the faujasite supercages, even though benzene has only access to the supercages. This evidences selective enhancement of BAS near Lewis acidic EFAl species, which according to the NMR findings are located in the faujasite sodalite cages.
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- 2021
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7. MRI Evaluation of Acute Abdominal and Pelvic Pain in Pregnant Patients
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Amira A. A. Abuteir, Maha M. H. Almutairi, Sharifa M. Hadi, and Rufida E. Ahmed
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medicine.medical_specialty ,business.industry ,Pelvic pain ,medicine ,General Medicine ,Radiology ,medicine.symptom ,business - Published
- 2021
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8. Stigmatization and discrimination against people living with HIV/AIDS: Knowledge, attitudes, and practices of healthcare workers in the primary healthcare centers in Madinah, Saudi Arabia, 2022
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Hani H O, Alharbi, Sami A R, Al-Dubai, Rami M H, Almutairi, and Mohammed H, Alharbi
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There are very few studies in Saudi Arabia on stigmatization and discrimination against people living with HIV/AIDS (PLWHA), a critical step for the prevention and control of HIV. The aim of this study was to assess the level of stigmatization and discrimination against PLWHA by healthcare workers (HCWs) as well as their knowledge, attitude, and practices (KAP).This cross-sectional study included 182 HCWs at primary healthcare centers in Medina, Saudi Arabia. The validated short version of the Healthcare Provider HIV/AIDS Stigma Scale and the AIDS Attitude Scale were used in this research. Student'sMost participants were males (58.2%) and aged more than 30 years (60.4%). The tendency to stigmatizing behavior was present in 24.2%-68.17% of the participants, and discriminatory practice was present in 11.5%-50% of the participants. In multiple linear regression analysis, factors that independently predicted the knowledge score were being a doctor compared to nurses (This study found that stigmatization and discrimination were less prevalent in HCWs who had good HIV-related knowledge and had received in-service training for PLWHA. The results highlight the significance of continuing education and training opportunities for HCWs to provide effective and appropriate treatment to PLWHA.
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- 2022
9. Dense Convolutional Neural Network for Detection of Cancer from CT Images
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S. V. N. Sreenivasu, S. Gomathi, M. Jogendra Kumar, Lavanya Prathap, Abhishek Madduri, Khalid M. A. Almutairi, Wadi B. Alonazi, D. Kali, and S. Arockia Jayadhas
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ComputingMethodologies_PATTERNRECOGNITION ,Article Subject ,General Immunology and Microbiology ,Neoplasms ,Image Processing, Computer-Assisted ,Humans ,Reproducibility of Results ,General Medicine ,Neural Networks, Computer ,Tomography, X-Ray Computed ,General Biochemistry, Genetics and Molecular Biology - Abstract
In this paper, we develop a detection module with strong training testing to develop a dense convolutional neural network model. The model is designed in such a way that it is trained with necessary features for optimal modelling of the cancer detection. The method involves preprocessing of computerized tomography (CT) images for optimal classification at the testing stages. A 10-fold cross-validation is conducted to test the reliability of the model for cancer detection. The experimental validation is conducted in python to validate the effectiveness of the model. The result shows that the model offers robust detection of cancer instances that novel approaches on large image datasets. The simulation result shows that the proposed method provides analyzes with 94% accuracy than other methods. Also, it helps to reduce the detection errors while classifying the cancer instances than other methods the several existing methods.
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- 2022
10. Iron Pathophysiology in Stroke
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Mohammed M A, Almutairi, Grace, Xu, and Honglian, Shi
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Stroke ,Oxidative Stress ,Hepcidins ,Iron ,Humans - Abstract
Ischemic and hemorrhagic stroke are the common types of stroke that lead to brain injury neurological deficits and mortality. All forms of stroke remain a serious health issue, and there is little successful development of drugs for treating stroke. Incomplete understanding of stroke pathophysiology is considered the main barrier that limits this research progress. Besides mitochondria and free radical-producing enzymes, labile iron is an important contributor to oxidative stress. Although iron regulation and metabolism in cerebral stroke are not fully understood, much progress has been achieved in recent years. For example, hepcidin has recently been recognized as the principal regulator of systemic iron homeostasis and a bridge between inflammation and iron regulation. This review discusses recent research progress in iron pathophysiology following cerebral stroke, focusing molecular regulation of iron metabolism and potential treatment targets.
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- 2019
11. Influence of Extraframework Aluminum on the Brønsted Acidity and Catalytic Reactivity of Faujasite Zeolite
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Pieter C. M. M. Magusin, Marcello Stefano Rigutto, Sami M. T. Almutairi, Evgeny A. Pidko, Georgy A. Filonenko, Emiel J. M. Hensen, Brahim Mezari, and Inorganic Materials & Catalysis
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Ion exchange ,Chemistry ,Organic Chemistry ,Inorganic chemistry ,Infrared spectroscopy ,Faujasite ,engineering.material ,Catalysis ,Inorganic Chemistry ,Adsorption ,engineering ,Reactivity (chemistry) ,Physical and Theoretical Chemistry ,Zeolite ,Brønsted–Lowry acid–base theory - Abstract
A series of faujasite zeolites was modified by extraframework Al (AlEF) with the goal to investigate the influence of such species on the intrinsic Brønsted acidity and catalytic activity towards paraffin cracking. The chemical state of AlEF and zeolite acidity were investigated by 27Al MAS NMR and COads IR spectroscopy, H/D exchange reaction, and propane cracking. Strongly acidic defect-free Y zeolites were obtained by substitution of framework Al by Si with (NH4)2SiF6. In accordance with the next-nearest-neighbor model, the intrinsic acidity of the protons increased with decreasing framework Al density. This increased acidity was evidenced by an increased shift of the OH stretching vibration upon CO adsorption in COads IR spectroscopy and by an increased H/D exchange rate in H/D exchange reactions with perdeuterobenzene. All of the acid sites in these zeolites were of equal strength beyond a certain Si/Al ratio. The increased acidity resulted in an enhanced propane cracking activity. Modification of a model dealuminated Y zeolite by AlEF only resulted in a small fraction of cationic AlEF species, because it was difficult to control the ion exchange process. In comparison, commercial ultrastabilized Y zeolites contained less AlEF and these species were predominantly present in cationic form. The rate of propane cracking strongly correlated to the concentration of Brønsted acid sites perturbed by cationic AlEF species. The results of MQMAS 27Al NMR spectroscopy confirmed the presence of sites perturbed by AlEF and unaffected framework Al sites. Zeolites with higher intrinsic cracking activities contained a higher proportion of perturbed sites. Although COads IR and H/D exchange methods proved to be suitable methods to probe the acidity of Y zeolites free from AlEF, they were less suitable to predict the reactivity if the Brønsted acid sites were affected by cationic AlEF species.
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- 2013
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12. Triangle of Safety Technique: A New Approach to Laparoscopic Cholecystectomy
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Abdulrahman F. M. S. Almutairi and Yousef A. M. S. Hussain
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Adult ,Male ,medicine.medical_specialty ,Adolescent ,medicine.medical_treatment ,lcsh:Surgery ,Gallbladder Diseases ,Dissection (medical) ,Cystic artery ,Cohort Studies ,Young Adult ,medicine.artery ,Electrocoagulation ,medicine ,Humans ,lcsh:RC799-869 ,Laparoscopic cholecystectomy ,Aged ,Retrospective Studies ,Hepatology ,Common bile duct ,Methodology Report ,business.industry ,Dissection ,lcsh:RD1-811 ,Middle Aged ,medicine.disease ,Surgery ,medicine.anatomical_structure ,Cholecystectomy, Laparoscopic ,Cystic duct ,lcsh:Diseases of the digestive system. Gastroenterology ,Female ,Cholecystectomy ,Bile Ducts ,Peritoneum ,business ,Gallbladder wall ,Artery - Abstract
Backgrounds and Study Aims. Common bile duct (CBD) injury is one of the most serious complications of laparoscopic cholecystectomy (LC). Misidentification of the CBD during dissection of the Calot's triangle can lead to such injuries. The aim of the authors in this study is to present a new safe triangle of dissection. Patients and Method. 501 patients under went LC in the following approach; The cystic artery is identified and mobilized from the gall bladder (GB) medial wall down towards the cystic duct which would simultaneously divide the medial GB peritoneal attachment. This is then followed by dividing the lateral peritoneal attachment. The GB will be unfolded and the borders of the triangle of safety (TST) are achieved: cystic artery medially, cystic duct laterally and the gallbladder wall superiorly. The floor of the triangle is then divided to delineate both cystic duct and artery in an area relatively far from CBD. Results. There were little significant immediate or delayed complications. The mean operating time was 68 minutes, nearly equivalent to the conventional method. Conclusions. Dissection at TST appears to be a safe procedure which clearly demonstrates the cystic duct and may help to reduce the CBD injuries.
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- 2009
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