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1,893 results on '"Zaki, Mohamed A."'

1. The comparative study of high efficiency of Tm^{3+}-doped fiber laser at 1.72 \mu m for different pump schemes

Author

Zaki, Mohamed, Abouricha, Mostafa, and Amrane, Said

Subjects
Physics - Optics
Abstract

In this study, we revealed the impact of the pumping scheme, fiber length, pumping power, and reflectivity of the output fiber Bragg grating on the performance of a Tm^3+ -doped fiber laser (TDFL) operating at a wavelength of 1.72 \mu m. Using numerical simulations, we optimized the output power and reduced losses due to reabsorption; as well as amplified spontaneous emission (ASE) at approximately 1820 nm. The Tm^3+ -doped fiber was bi-directionally pumped at 1570 nm to enhance the pump absorption. The simulations suggest that a maximum power of 5.96W at 1.72 \mu m and a slope efficiency of 64 % are achievable using a Tm^{3+}-doped silica fiber with a bi-directional pump of 4 W forward and 6 W backward.

Published
2024

2. Unraveling the impact of miRNAs on gouty arthritis: diagnostic significance and therapeutic opportunities

Author

Abdel Mageed, Sherif S., Elimam, Hanan, Elesawy, Ahmed E., Abulsoud, Ahmed I., Raouf, Ahmed Amr, Tabaa, Manar Mohammed El, Mohammed, Osama A., Zaki, Mohamed Bakr, Abd-Elmawla, Mai A., El-Dakroury, Walaa A., Mangoura, Safwat Abdelhady, Elrebehy, Mahmoud A., Elballal, Mohammed S., Mohamed, Aya A., Ashraf, Alaa, Abdel-Reheim, Mustafa Ahmed, Eleragi, Ali M. S., Abdellatif, Hussein, and Doghish, Ahmed S.

Published
2024
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6. Unraveling the miRNA Puzzle in Atherosclerosis: Revolutionizing Diagnosis, Prognosis, and Therapeutic Approaches

Author

Abulsoud, Ahmed I., Elshaer, Shereen Saeid, Rizk, Nehal I., Khaled, Reem, Abdelfatah, Amr M., Aboelyazed, Ahmed M., Waseem, Aly M., Bashier, Doha, Mohammed, Osama A., Elballal, Mohammed S., Mageed, Sherif S. Abdel, Elrebehy, Mahmoud A., Zaki, Mohamed Bakr, Elesawy, Ahmed E., El-Dakroury, Walaa A., Abdel-Reheim, Mustafa Ahmed, Saber, Sameh, and Doghish, Ahmed S.

Published
2024
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16. Formal Analysis of Vehicular Crash Severity Using KeYmaera X

Author

Barhoumi, Oumaima, Zaki, Mohamed H, Tahar, Sofiène, Goos, Gerhard, Series Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Watt, Stephen M., editor, and Ida, Tetsuo, editor

Published
2024
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17. Advancing Tumor Cell Classification and Segmentation in Ki-67 Images: A Systematic Review of Deep Learning Approaches

Author

Zaki, Mohamed, Elallam, Oussama, Jami, Oussama, EL Ghoubali, Douae, Jhilal, Fayssal, Alidrissi, Najib, Ghazal, Hassan, Habib, Nihal, Abbad, Fayçal, Benmoussa, Adnane, Bakkali, Fadil, Kacprzyk, Janusz, Series Editor, Gomide, Fernando, Advisory Editor, Kaynak, Okyay, Advisory Editor, Liu, Derong, Advisory Editor, Pedrycz, Witold, Advisory Editor, Polycarpou, Marios M., Advisory Editor, Rudas, Imre J., Advisory Editor, Wang, Jun, Advisory Editor, Ezziyyani, Mostafa, editor, and Balas, Valentina Emilia, editor

Published
2024
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18. The Complete Mitochondrial Genome of Chrysina Resplendens

Author

EL Ghoubali, Douae, Pirro, Stacy, Zaki, Mohamed, Azami, Abdellah Idrissi, Al Idrissi, Najib, Rhalem, Wajih, Nejjari, Chakib, Ghazal, Hassan, Kacprzyk, Janusz, Series Editor, Gomide, Fernando, Advisory Editor, Kaynak, Okyay, Advisory Editor, Liu, Derong, Advisory Editor, Pedrycz, Witold, Advisory Editor, Polycarpou, Marios M., Advisory Editor, Rudas, Imre J., Advisory Editor, Wang, Jun, Advisory Editor, Ezziyyani, Mostafa, editor, and Balas, Valentina Emilia, editor

Published
2024
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21. The use of urinary kidney injury molecule-1 and neutrophil gelatinase-associated lipocalin for diagnosis of hepato-renal syndrome in advanced cirrhotic patients

Author

Mohamed Adel Abd Elaziz, Asmaa Mustafa Gouda Elewa, Dina Zaki Mohamed Zaki Abdel Hamid, Nohier Essam Soliman Ahmed Hassan, Éva Csongrádi, Emad Hamdy Hamouda Mohammed, and Mohammed Abdel Gawad

Subjects
Hepatorenal syndrome, neutrophil gelatinase-associated lipocalin, urinary kidney injury molecule-1, serum creatinine, liver cirrhosis, Diseases of the genitourinary system. Urology, RC870-923
Abstract

Background Chronic liver disease is a common and important clinical problem. Hepatorenal syndrome (HRS) is a life threatening complication. Serum creatinine (Cr) remains the only conventional indicator of renal function. However, the interpretation of serum Cr level can be confounded by malnutrition and reduced muscle mass often observed in patients with severe liver disease. Here, we present a cross-sectional study to explore the sensitivity and specificity of other markers as urinary KIM-1 and NGAL for cases of HRS.Methods Cross-sectional study was conducted on 88 patients who were admitted to Alexandria main university hospital. Enrolled patients were divided in two groups; group 1: patients with advanced liver cirrhosis (child B and C) who have normal kidney functions while group 2: patients who developed HRS. Stata© version 14.2 software package was used for analysis.Results Group 1 included 18 males and 26 females compared to 25 males and 19 females in group 2 (p = 0.135). Only the urinary KIM-1 showed a statistically significant difference between both groups in the multivariate logistic regression analysis adjusted for gender, serum bilirubin, serum albumin, INR, serum K, AST and ALT levels.Conclusion In conclusion, our study aligns with prior research, as seen in the consistent findings regarding Urinary NGAL elevation in cirrhotic patients with AKI. Urinary KIM-1, independent of Urinary NGAL, may have a role in precisely distinguishing between advanced liver cirrhosis and HRS and merits further exploration.

Published
2024
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26. The emerging role of miRNAs in pituitary adenomas: From molecular signatures to diagnostic potential

Author

Doghish, Ahmed S., El-Sayyad, Gharieb S., Abdel Mageed, Sherif S., Abd-Elmawla, Mai A., Sallam, Al-Aliaa M., El Tabaa, Manar Mohammed, Rizk, Nehal I., Ashraf, Alaa, Mohammed, Osama A., Mangoura, Safwat Abdelhady, AL-Noshokaty, Tohada M., Zaki, Mohamed Bakr, El-Dakroury, Walaa A., Elrebehy, Mahmoud A., Abdel-Reheim, Mustafa Ahmed, Elballal, Mohammed S., and Abulsoud, Ahmed I.

Published
2024
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27. Emerging insights: miRNA modulation of ferroptosis pathways in lung cancer

Author

Elsakka, Elsayed G.E., Midan, Heba M., Abulsoud, Ahmed I., Fathi, Doaa, Abdelmaksoud, Nourhan M., Abdel Mageed, Sherif S., Zaki, Mohamed Bakr, Abd-Elmawla, Mai A., Rizk, Nehal I., Elrebehy, Mahmoud A., Abdelghany, Tamer M., Elesawy, Ahmed E., Shahin, Reem K., El Tabaa, Manar Mohammed, Mohammed, Osama A., Abdel-Reheim, Mustafa Ahmed, Elballal, Mohammed S., and Doghish, Ahmed S.

Published
2024
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28. The miRNA Landscape in Crohn's disease: Implications for novel therapeutic approaches and interactions with Existing therapies

Author

Moustafa, Hebatallah Ahmed Mohamed, Elsakka, Elsayed G.E., Abulsoud, Ahmed I., Elshaer, Shereen Saeid, Rashad, Ahmed A., El-Dakroury, Walaa A., Sallam, Al-Aliaa M., Rizk, Nehal I., Zaki, Mohamed Bakr, Gomaa, Rania M., Elesawy, Ahmed E., Mohammed, Osama A., Abdel Mageed, Sherif S., Eleragi, Ali M.S., ElBoghdady, Jasmine A., El-Fayoumi, Shaimaa H., Abdel-Reheim, Mustafa Ahmed, and Doghish, Ahmed S.

Published
2024
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33. Therapeutic effects of green-formulated gold nanoparticles by Origanum majorana on spinal cord injury in rats

Author

Jia Lifang, Eltantawy Waleed, Zaki Mohamed Samir Ahmed Ahmed, Sideeg Abulqasim M., Mohammed Heitham M., El-kott Attalla F., and Massoud Diaa

Subjects
spinal cord injury, neuroprotective activities, origanum majorana, gold nanoparticles, Chemistry, QD1-999
Abstract

In a recent study, we evaluated the remedial properties of gold nanoparticles (gold NPs) green-formulated by Origanum majorana on spinal cord injury in rats. UV-Vis, FE-SEM, FT-IR, and TEM tests were applied to characterize the recent gold NPs. The IC50 values of O. majorana, gold NPs, and butylated hydroxytoluene were 382, 250, and 165 µg/mL, respectively, against DPPH. In in vivo tests, 40 male rats were grouped into four groups: the sham, intact, control, and gold NP (50 µg/kg) groups. Hematoxylin and eosin staining was done to test the lesions post-injury. To determine the neural conduction recovery, somatosensory evoked potential experiments were carried out. For determining the astrogliosis, the GFAP expression was evaluated. All rats were assessed for behavior outcomes using the Basso, Beattie, and Bresnahan (BBB) scores every week after spinal cord injury onset. The neuroprotective effects of gold NPs caused improvement in the spinal cord injury contusive model in Wistar rats. Delayed responses were reduced significantly and BBB scores were raised significantly in the gold NP group on sensory tests. The highest reduction in GFAP was evident in the gold NP group. The ventral motor neuron number raised significantly and cavity areas reduced significantly in the gold NP group. Electromyography findings indicated notable improvement of hindlimbs in the gold NP (50 µg/kg) group.

Published
2023
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34. Towards formalization and monitoring of microscopic traffic parameters using temporal logic

Author

Nour, Mariam and Zaki, Mohamed H.

Subjects
Computer Science - Computers and Society, Electrical Engineering and Systems Science - Systems and Control
Abstract

Smart cities are revolutionizing the transportation infrastructure by the integration of technology. However, ensuring that various transportation system components are operating as expected and in a safe manner is a great challenge. In this work, we propose the use of formal methods as a means to specify and reason about the traffic network's complex properties. Formal methods provide a flexible tool to define the safe operation of the traffic network by capturing non-conforming behavior, exploring various possible states of the traffic scene, and detecting any inconsistencies within it. Hence, we develop specification-based monitoring for the analysis of traffic networks using the formal language, Signal Temporal Logic. We develop monitors that identify safety-related behavior such as conforming to speed limits and maintaining appropriate headway. The framework is tested using a calibrated micro-simulated highway scenario and offline specification-based monitoring is applied to individual vehicle trajectories to understand whether they violate or satisfy the defined safety specifications. Statistical analysis of the outputs show that our approach can differentiate violating from conforming vehicle trajectories based on the defined specifications. This work can be utilized by traffic management centers to study the traffic stream properties, identify possible hazards, and provide valuable feedback for automating the traffic monitoring systems.

Published
2021

37. Dietary co-enzyme Q10 boosted the growth performance, antioxidative capacity, immune responses, and intestinal and hepatic histomorphology of grey mullet (Liza ramada)

Author

El Basuini, Mohammed F., Abdel Fattah, Amany Mohamed, El-Hais, Abdelaziz M., Soliman, Ali A., Amer, Asem A., Gewaily, Mahmoud, Zaki, Mohamed A.A., Zaineldin, Amr I., Dossou, Serge, Teiba, Islam I., Mzengereza, Kumbukani, Tembo, Mavuto, Singini, Wales, and Shehata, Akram Ismael

Published
2024
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46. Developing a mortality risk prediction model using data of 3663 hospitalized COVID-19 patients: a retrospective cohort study in an Egyptian University Hospital

Author

Kandil, Sahar, Tharwat, Ayman I., Mohsen, Sherief M., Eldeeb, Mai, Abdallah, Waleed, Hilal, Amr, Sweed, Hala, Mortada, Mohamed, Arif, Elham, Ahmed, Tarek, Elshafie, Ahmed, Youssef, Tarek, Zaki, Mohamed, El-Gendy, Yasmin, Ebied, Essam, Hamad, Safwat, Habil, Ihab, Dabbous, Hany, El-Said, Amr, Mostafa, Yasser, Girgis, Samia, Mansour, Ossama, El-Anwar, Ali, Omar, Ashraf, Saleh, Ayman, and El-Meteini, Mahmoud

Published
2023
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48. Exploring DMD-type Algorithms for Modeling Signalised Intersections

Author

Shabab, Kazi Redwan, Mustavee, Shakib, Agarwal, Shaurya, Zaki, Mohamed H., and Das, Sajal

Subjects
Electrical Engineering and Systems Science - Systems and Control
Abstract

This paper explores a novel data-driven approach based on recent developments in Koopman operator theory and dynamic mode decomposition (DMD) for modeling signalized intersections. Vehicular flow and queue formation on signalized intersections have complex nonlinear dynamics, making system identification, modeling, and controller design tasks challenging. We employ a Koopman theoretic approach to transform the original nonlinear dynamics into locally linear infinite-dimensional dynamics. The data-driven approach relies entirely on spatio-temporal snapshots of the traffic data. We investigate several key aspects of the approach and provide insights into the usage of DMD-type algorithms for application in adaptive signalized intersections. To demonstrate the utility of the obtained linearized dynamics, we perform prediction of the queue lengths at the intersection; and compare the results with the state-of-the-art long short term memory (LSTM) method. The case study involves the morning peak vehicle movements and queue lengths at two Orlando area signalized intersections. It is observed that DMD-based algorithms are able to capture complex dynamics with a linear approximation to a reasonable extent., Comment: 11 pages, 8 figures, Submitted to: Journal of Intelligent Transportation Systems

Published
2021

49. Study of Cosavirus, Salivirus, and Bufavirus viruses in children with acute gastroenteritis

Author

Omnia Ahmed Mohamed Salem, Maysaa El Sayed Zaki, Ahmed G. Elsayed, Ahmed Zaki Mohamed Hassan, and Eman Hamdy Mohamed

Subjects
Acute gastroenteritis, Children, Rotavirus, Adenovirus, Buvavirus, Cosavirus, Medicine (General), R5-920, Science
Abstract

Abstract Background Acute gastroenteritis (AGE) in children represents a health problem. Besides common enteric viruses such as rotavirus and adenovirus, new viruses such as cosavirus, salivirus, and bufavirus may be associated with AGE. The objective of the study was to detect cosavirus, salivirus, and bufavirus viruses in children below 5 years with acute gastroenteritis by the use of real-time polymerase chain reaction (PCR) besides detection of rotavirus and adenovirus by enzyme-linked immunosorbent assay (ELISA). Method The study included 150 children ≤ 5 years with community-acquired diarrhea. Stool samples from children were subjected for the detection of rotavirus and adenovirus antigens by ELISA and for detection of buvavirus, salivirus, and cosavirus by real-time PCR. Results The commonest virus detected in the stool samples of children with AGE was rotavirus 31.3% followed by adenovirus 24%. Among the new viruses studied, salivirus was detected in six samples (4.0%), buvavirus was detected in four samples (2.7%), and cosavirus was detected in two samples (1.3%). The mixed rotavirus detection with studied viruses was 23.4% for adenovirus, 4.3% for calicivirus, and 2.1% for bocavirus, and none of the detected cosavirus was associated with rotavirus. In the studied children, at least one of the new viruses was detected in ten children (6.7%). Buvavirus, salivirus, and cosavirus were detected as a single virus (0.7%) in the children with acute gastroenteritis and buvavirus was detected with cosavirus without other viruses in one sample (0.7%). Conclusion The study reports the occurrence of buvavirus, cosavirus, and salivirus in the pediatric patients with community-acquired acute gastroenteritis. There was a high prevalence of rotavirus and adenovirus antigens in those patients with low positivity for buvavirus, cosavirus, and salivirus viruses. There is a need for a large cohort study to study the prevalence of buvavirus, cosavirus, and salivirus in pediatrics with acute gastroenteritis and to validate their association with the disease.

Published
2023
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