11 results on '"Ismail, Marwa M."'
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2. Multi-Beam Metasurface Control Based on Frequency Reconfigurable Antenna.
- Author
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Ismail, Marwa M., Qas Elias, Bashar Bahaa, Elwi, Taha A., Bashar, Bashar S., Alanssari, Ali Ihsan, Rhazal, Z. A., and Misran, Halina
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MICROSTRIP transmission lines ,REFLECTANCE ,RADIATION ,ANTENNA arrays ,SPECTRUM analysis - Abstract
Copyright of Informacije MIDEM: Journal of Microelectronics, Electronic Components & Materials is the property of MIDEM Society and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2024
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- View/download PDF
3. Synergistic Effect of Compost Tea, Micronutrients and Antioxidants on Downy Mildew Control of Sweet Basil under Greenhouse and Field Conditions.
- Author
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Ahmed, Hamada F. A., Abdel-Wahed, Gomaa A., Imara, Doaa A., Ismail, Marwa M., Badr, Shaymaa A. A., and Mohamed, Atef M.
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BASIL ,COMPOSTING ,MICRONUTRIENTS ,DOWNY mildew diseases ,TEA ,PHOTOSYNTHETIC pigments ,COPPER - Abstract
Copyright of Scientific Journal of Agricultural Sciences (SJAS) is the property of Beni Suef University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2024
- Full Text
- View/download PDF
4. Reconfigurable CRLH‐inspired antenna based on Hilbert curve EBG structure for modern wireless systems.
- Author
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Ismail, Marwa M., Elwi, Taha A., and Salim, A. J.
- Subjects
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ANTENNAS (Electronics) , *UNIT cell , *ANTENNA design , *AMPLITUDE modulation , *BAND gaps - Abstract
This paper presents a novel antenna design with an enhanced gain‐bandwidth product for modern communication networks, including 5G systems. The design is consistent with 17 unit cells of a composite right/left‐hand (CRLH) structure with an electromagnetic band gap of Hilbert inclusions. Therefore, the resulting design occupies an area of 40 × 200 mm2 of a Taconic RF‐43 substrate. The maximum antenna gain is 16 dBi at 5.5 GHz, which is very applicable for long‐range communication systems. Nevertheless, the antenna performance is controlled with optical switches of light‐dependent resistors (LDR) technology. Therefore, the antenna performance is tested with different switching seniors to investigate the possibility of reconfiguration scenarios at various frequency bands. However, the antenna gain is highly affected by changing LDR switching status; for example, at 5.5 GHz, the antenna gain is varied between 7 and 16 dBi. Thus, the proposed antenna is an excellent candidate for direct amplitude modulation. Finally, the antenna simulation results and measurements agree very well with each other. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
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5. TESTING THE EFFICACY OF SILICON AND GLUTATHIONE IN INDUCING SYSTEMIC RESISTANCE AGAINST FUSARIUM SOLANI, THE CAUSE OF BROAD BEAN ROOT ROT.
- Author
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Ismail, Marwa M. and Ibrahim, Bassam Y.
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ROOT rots , *FUSARIUM solani , *GLUTATHIONE , *POLYPHENOL oxidase , *PLANT diseases , *SUPEROXIDE dismutase , *FAVA bean - Abstract
Silicone and Glutathione application are including systemic acquired resistance or resistance induced against plant diseases against. It is a successful means to control plant rot disease and it leads to fundamental effects on the physiology of the host, as Silicone and Glutathione use in as induced resistance agent hostile to Fusarium solani causal agent of Broad bean root rot disease .The results of this study appeared that Silicone and Glutathione application have make less root tot incidence and severity in Broad bean plants and increase resistance-Linked enzymes Action of Peroxidase (POD) Polyphenol Oxidase (PPO) superoxide dismutase (SOD ) and Total Phenols (TP) in Broad bean infected roots with F. solani treated with Silicone and Glutathione. This indicates the ability of silicon and glutathione to induce resistance against fungus in bean plants by increasing the activity of polyphenol oxidase, peroxidase, and superoxide enzymes. These results are promising for the use of silicon and glutathione to control root rot infection of broad bean caused by F. solani. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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6. Domiciliation of Trichoderma asperellum Suppresses Globiosporangium ultimum and Promotes Pea Growth, Ultrastructure, and Metabolic Features.
- Author
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Moussa, Zeiad, Alanazi, Yasmene F., Khateb, Aiah Mustafa, Eldadamony, Noha M., Ismail, Marwa M., Saber, WesamEldin I. A., and Darwish, Doaa Bahaa Eldin
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TRICHODERMA ,LYSINS ,PHOTOSYNTHETIC pigments ,MICROBIAL diversity ,ENDOPHYTIC fungi ,PLANT polyphenols - Abstract
The beneficial microorganisms represent a new and hopeful solution for a sustainable environment and development. In this investigation, Trichoderma asperellum ZNW, isolated from seeds, was domiciliated within the pea plant for improving growth, disease management, and enhancement of productivity. Globisporangium ultimum NZW was isolated from deformed pea seeds, representing the first record of the pathogen caused by pea damping-off. Both fungi were molecularly identified. T. asperellum ZNW produced several lytic enzymes and bioactive metabolites as detected by GC-MC. The SEM illustrated the mycoparasitic behavior of T. asperellum ZNW on G. ultimum NZW mycelia. In the pot experiment, T. asperellum domiciliated the root and grew as an endophytic fungus, leading to root vessel lignification. Under soil infection, T. asperellum reduced damping-off, by enhancing peroxidase, polyphenol, total phenols, and photosynthetic pigments content. The vegetative growth, yield, and soil dehydrogenase activity were improved, with an enhancement in the numerical diversity of the microbial rhizosphere. This work may enable more understanding of the plant-fungal interaction, yet, working on domiciliation is recommended as a new approach to plant protection and growth promotion under various ecological setups. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
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7. A Miniaturized Printed Circuit CRLH Antenna-based Hilbert Metamaterial Array.
- Author
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Ismail, Marwa M., Elwi, Taha A., and Salim, A. J.
- Subjects
PRINTED circuits ,ANTENNAS (Electronics) ,ANTENNA design ,PIN diodes ,METAMATERIALS - Abstract
With the development of communication systems and antennas, various challenges arise that require antennas of small size with enhanced performance. Metamaterials (MTM) defects introduced a considerable solution to such a challenge. Therefore, in this paper, a lightweight with low profile antenna is designed based on a novel design of a Composite Right/Left-Handed CRLH-MTM Hilbert array. The proposed CRLH-MTM unit cell consists of a T-symmetric CRLH unit cell conjugated to the 3rdorder Hilbert on the ground plane through a T-stub structure to enhance the gain-bandwidth product. CST-MWS is used to stimulate and design the proposed antenna structure. The antenna parameters are optimized to evaluate the antenna performance in gain and S11. As a result, the antenna can operate forward and backwards with a large scanning angle ranging from +34o to - 134o with changing frequency, and dual-band extended from 3.3GHz to 4.2GHz 4.86GHz 5.98GHz with a maximum gain of 7.24dBi and 3.74dBi, respectively. The beam steering is achieved by trough controlling the switching operation of PIN diodes. As a result, the antenna can scan up to 8° from 34° to 42° at 3.5GHz with constant gain along with the operating range. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
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8. Comparison of inhaled salbutamol and intravenous furosemide in the treatment of transient tachypnea of the newborn regarding their safety and efficacy.
- Author
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Sabry, Amira M., Azeem, Mohammed A. A., Ismail, Marwa M., El Khatib, Dina H. E. D. H., and AbdelAziz, Iman A.
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TACHYPNEA ,FUROSEMIDE ,DRUG therapy ,HOSPITAL care ,ALBUTEROL - Abstract
Postnatal respiratory complications among term infants are common. The most commonly reported cause of neonatal respiratory distress is transient tachypnea of the newborn (TTN), with an estimated incidence of 0.5-2.8% of all newborns. Aim To evaluate and compare the efficacy and safety of inhaled salbutamol and intravenous (i.v.) furosemide in the treatment of TTN and to monitor of their possible adverse effects in neonates. Patients and methods This was a randomized controlled clinical trial on 100 neonates who were admitted immediately or shortly after birth owing to persistence of tachypnea to neonatal intensive care unit of pediatric hospitals, Cairo University, over a 1-year period. Our study included 100 neonates (25 in the salbutamol group, 25 in the furosemide group, and 50 in the control group) with TTN born between 35 and 39 weeks of gestational age. They were randomized in a blinded manner to receive one nebulized dose of salbutamol 0.15 mg/kg in 0.9% saline solution or i.v. furosemide 1 mg/kg once in addition to oxygen and i.v. fluids or received oxygen and i.v. fluids alone. Results The efficacy of inhaled salbutamol and furosemide was assessed by determining the respiratory rate, heart rate, TTN clinical score, and the level of respiratory support before receiving medication and 30 min, 1, and 4 h after drug therapy. The duration and level of respiratory support and the period of hospitalization were shorter in the salbutamol group. There was a significant decrease in the respiratory rate and TTN score in the salbutamol group 4 h after nebulized salbutamol. Conclusion Comparing the three groups after respiratory support, TTN score was significantly improved in the salbutamol group. The total duration of oxygen treatment in hours and total neonatal intensive care unit stay in days were significantly shorter in the salbutamol group than in furosemide and control groups. Regarding the safety of salbutamol, our study did not show a significant difference in adverse effects. Inhaled salbutamol treatment was effective in TTN without adverse events. Further studies at larger or repeated doses of furosemide may be needed. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
9. Comparative and analysis of evaluation of several direction of arrival estimation methods.
- Author
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Kamil, Aya Ahkam, Ismail, Marwa M., and Bashar, Bashar S.
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DIRECTION of arrival estimation , *MULTIPLE Signal Classification , *COMPARATIVE studies , *MAXIMUM entropy method , *PARAMETER estimation , *ALGORITHMS , *SIGNAL processing - Abstract
Modern-day, global, and clever array systems have several distinguished approaches with regard to a wireless device. In this paper, a comparative analysis has been carried out amongst nine direction of arrival (DOA) algorithms: Capon, multiple signal classification (MUSIC), Bartlett, Pisarenko, linear prediction, maximum entropies, and min-norm, root- MUSIC, and estimation of signal parameters via rotational invariance technique (ESPRIT). in this paper reduces the number of antennas and snaps necessary to observe six target swithout interference for several DOA estimation methods. After comparing and analyzing all the algorithms, it has been shown that the music algorithm is the best algorithm that reduces interference and detects the desired sources. MATLAB R2019b was used in the simulation process. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
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10. Intelligent alarm system for hospitals using smartphone technology.
- Author
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Bashar, Bashar S. and Ismail, Marwa M.
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HOSPITALS , *HOSPITAL administration , *HOSPITAL utilization , *AMBULANCES , *MEDICAL care , *WEB services , *INTELLIGENT sensors , *MEDICAL telematics - Abstract
During the last decade, attention was paid to detect the accident and call the ambulance as soon as possible, the situation was neglected after the arrival of the patient to the specified service point. This negligence led to an increase in the mortality rate, especially where the highest percentage of deaths occurred during the first hour after the accident. This highest Mortality can be avoided by providing proper health care after the arrival of the patient to the hospital, the proposed system reduces the rescue time after the arrival of a patient to the hospital, and it requires each hospital to be endowed with a reception model responsible for detecting and reporting accident situations to the emergency service. It was be found that there is an urgent need for a web-based hospital management system with a mobile web service to respond immediately to incidents in the event of an accident. This system utilizes the android phone application to connect to the server for transferring the specified data to the hospital and it can be used for comprehensive accident analysis and management. In this paper, a combination of Android phone application, database, and visual studio 2012 was used to develop the system. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
11. Studying Autism Spectrum Disorder with Structural and Diffusion Magnetic Resonance Imaging: A Survey.
- Author
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Ismail, Marwa M. T., Keynton, Robert S., Mostapha, Mahmoud M. M. O., ElTanboly, Ahmed H., Casanova, Manuel F., Gimel'farb, Georgy L., El-Baz, Ayman, Dong-Hoon Lee, and Miao Cao
- Subjects
AUTISM spectrum disorders ,MAGNETIC resonance imaging ,NONINVASIVE diagnostic tests ,AUTISTIC children ,DIFFUSION tensor imaging ,BRAIN stem ,DIAGNOSIS - Abstract
Magnetic resonance imaging (MRI) modalities have emerged as powerful means that facilitate non-invasive clinical diagnostics of various diseases and abnormalities since their inception in the 1980s. Multiple MRI modalities, such as different types of the sMRI and DTI, have been employed to investigate facets of ASD in order to better understand this complex syndrome. This paper reviews recent applications of structural magnetic resonance imaging (sMRI) and diffusion tensor imaging (DTI), to study autism spectrum disorder (ASD). Main reported findings are sometimes contradictory due to different age ranges, hardware protocols, population types, numbers of participants, and image analysis parameters. The primary anatomical structures, such as amygdalae, cerebrum, and cerebellum, associated with clinical-pathological correlates of ASD are highlighted through successive life stages, from infancy to adulthood. This survey demonstrates the absence of consistent pathology in the brains of autistic children and lack of research investigations in patients under 2 years of age in the literature. The known publications also emphasize advances in data acquisition and analysis, as well as significance of multimodal approaches that combine resting-state, task-evoked, and sMRI measures. Initial results obtained with the sMRI and DTI show good promise toward the early and non-invasive ASD diagnostics. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF
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