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Screening for hepatocellular carcinoma by Egyptian physicians

World Journal of Gastrointestinal Oncology 2015年第9期7卷 161-171页

作者： sahar m.hassany Ehab F Abdou moustafa mohamed El Taher Afaf Adel Abdeltwab Hubert E Blum Department of Tropical medicine and Gastroenterology Assiut University Assiut Hospital for Febrile Illnesses Department of Internal medicine Ⅱ Freiburg University

AIm: To assess the practice of Egyptian physicians in screening patients for hepatocellular carcinoma(HCC). mETHODS: The study included 154 physicians from all over Egypt caring for patients at risk for HCC. The study was based on a questionnaire with 20 items. Each questionnaire consisted of two parts:(1) personal information regarding the physician(name, age, specialty and type of health care setting); and(2) professional experience in the care of patients at risk for HCC development(screening, knowledge about the cause and natural course of liver diseases and HCC risk). RESULTS: Sixty-eight percent of doctors with an mD degree, 48% of doctors with a master degree or a diploma and 40% of doctors with a Bachelor of medicine, Bachelor of Surgery certificate considered the hepatitis C virus(HCV) genotype as risk factor for HCC development(P medicine, internal medicine or gastroenterology and 67% of physicians in other specialties advise patients to undergo screening for HCV and hepatitis B virus infection as well as liver cirrhosis(P ministry of Health(mOH) doctors consider HCV infection as the leading cause of HCC in Egypt(P mD degree, 55% of doctors with a master degree or a diploma, 56% of doctors with an mBBCH certificate, 74% of doctors in University Hospitals and 46% of mOH hospital doctors consider abdominal ultrasonography as the most important investigation in HCC screening(P medicine, internal medicine or gastroenterology and 37% of physicians in other specialties recommend as HCC screening interval of 3 mo(P mD degree, 50% of doctors with a master degree or diploma and 60% of doctors with an mBBCH certificate follow the same ***: In Egypt, physicians spe

关键词： Hepatocellular carcinoma Egyptian physicians Scree

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Fusion Navigation Technique for management of Difficult to Access Hepatocellular Carcinoma: A Single Center Experience

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Open Journal of Gastroenterology 2020年第12期10卷 329-340页

作者： Ahmed m. El Nakib sahar Zakria mohamed hassany mahmoud El-Bendary Tropical medicine and Hepatogastroentrology Department Mansoura Faculty of Medicine Mansoura University Mansoura Egypt National Hepatology and Tropical medicine Research Institute Cairo Egypt

Introduction: Sonography is the most universally used imaging technique for planning and performing thermal ablation in Hepatocellular carcinoma patients due to its efficiency and safety. However, the presence of HCC nodules that are hardly visible on traditional sonography is a major drawback to its use during thermal ablation. Real-time image fusion (fusion imaging) or real-time virtual sonography is a new technology that has been developed. Aim: To determine the value of fusion/navigation guided percutaneous thermal ablation in the management of hepatocellular carcinoma that has poor conspicuity at conventional sonography. Subjects and methods: This study included 70 HCC patients (BCLC A and B). Percutaneous radiofrequency ablation was done via real-time image fusion for 14 patients with poorly visible HCC nodules (study group), while Percutaneous radiofrequency ablation was done via traditional sonography for 56 patients with HCC nodules (control group). Results: The median time to reach the tumor was significantly shorter by using fusion navigation technique (m>Pm> = 0.034). By using fusion navigation technique 92% of the lesions were completely ablated while 55% only were completely ablated by using ultrasonography (m>Pm> = 0.014). One year after the procedure , by using fusion navigation technique 92% of the patients had complete response and only 55% of the patients had complete response by using conventional ultrasonography (m>Pm> = 0.011). The survival distributions for both interventions were statistically significantly different, χ2 = 10.12, m>P m>= 0.001. Conclusion: Fusion imaging-guided percutaneous RFA is a reasonable and efficient treatment of patients with HCC undetectable by traditional ultrasonography.

关键词： Fusion Navigation Hepatocellular Carcinoma Radiofrequency Ablation

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Effects of Plasticizers,Antioxidants and Burning Rate modifiers on Aging Performance of the HTPB/HmDI Composite Solid Propellant

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含能材料 2019年第1期27卷 21-27,90页

作者： Ahmed m Enew Ehab Abadir sahar Elmarsafy Karim K Elsharkawy Chemical Department Faculty of EngineeringCairo University School of Chemistry and Environment Beijing University of Aeronautics and Astronautics

The effects of plasticizers,antioxidants and burning rate modifiers on the aging performance of the composite solid propellant based on hydroxyl-terminated polybutadiene(HTPB)/hexamethylene diisocyanate(HmDI)were explored by apply-ing an accelerated aging program for 90 day at 70 ℃. The HTPB propellant matrix with the diisooctyl sebacate(DOS)as plasti-cizers and diisooctyl azelate(DOZ), antioxidants as N,N ′-Diphenyl-p-phenylenediamine(AO) and 2,2′-methylenebis(4-methyl-6-tert-butylphenol)(cyanox 2246)and burning rate modifiers as barium ferrite(BF),copper chromites(CC)and fer-ric oxide(FO)were varied. Results show that sample(S1)which based on DOS decreases the stress value and increases the strain value which considered to be an excellent start for aging program. Sample(S3)containing AO presents the higher resis-tance to oxidation showing the better performance that reflects on increasing the shelf life of the composite solid propellant mo-tor. Sample(S5)which based on BF enhances the ballistic performance among over the other tested two samples. The accelerat-ed aging program allowed us to estimate the motor in-service lifetime.

关键词： polybutadiene(HTPB)/hexamethylene diisocyanate(HmDI)composite solid propellant plasticizers antioxidants burning rate modifiers aging program

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Dielectric Function of Silicon Nanoclusters: Role of Hydrogen

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Chinese Physics Letters 2011年第9期28卷 241-244页

作者： SIB KRISHNA Ghoshal m.R.sahar m.S.Rohani Advanced Optical material Research Group Department of PhysicsFaculty of ScienceUniversiti Teknologi Malaysia81310 UTM SkudaiJohorMalaysia

Electronic and optical properties of small silicon quantum dots having 3 to 44 atoms per dot with and without surface passivation are investigated by computer simulation using the pseudo-potential *** empirical pseudo-potential Hamiltonian,a plane-wave basis expansion and a basic tetrahedral structure with undistorted local bonding configurations are *** structures of the quantum dots are relaxed and optimized before and after hydrogen *** is found that the gap increases more for a hydrogenated surface than the unpassivated ***,both quantum confinement and surface passivation determine the optical and electronic properties of Si quantum *** luminescence is probably due to the radiative recombination of electrons and holes in the quantum-confined *** effect of passivation of the surface dangling bonds by hydrogen atoms and the role of surface states on the gap energy is also *** results for the density of states,the dielectric function,the frequency dependent optical absorption cross section,the extinction coefficient and the static dielectric constants of the size are *** importance of the confinement and the role of surface passivation on the optical effects are discussed.

关键词： quantum dielectric extinction

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Efficacy of oral magnesium therapy in the treatment of chronic constipation in spastic cerebral palsy children:a randomized controlled trial

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World Journal of Pediatrics 2021年第1期17卷 92-98页

作者： sahar m.A.Hassanein Shaymaa m.Deifallah Hend A.Bastawy Pediatric Department Pediatric Neuropsychiatry UnitFaculty of MedicineAin Shams UniversityAbbassia SquareP.O.Box 11381CairoEgypt ministry of Health CairoEgypt

Background Constipation is a common problem in children with spastic cerebral palsy(sCP)with a prevalence that reaches 75%.We hypothesized that treating constipation in those children will improve their health and shorten time spent in daily *** aim was to evaluate the efficacy and safety of oral magnesium sulfate for treating chronic constipation in children with *** A prospective,double-blinded randomized control trial was carried out involving 100 children aged 2-12 years with sCP(level Ⅲ-Ⅴ of the Gross motor Functional Classification system)and chronic *** were followed up in the Pediatric neurology clinic,Children's hospital,Ain Shams University,may 2017-January *** intervention group(O-mg)received oral magnesium sulfate 1 mL/kg/day daily for 1 month compared to the *** measures were constipation improvement and decrease in bowel evacuation time after 1 *** Initially,weekly bowel movements,constipation scores and stool consistency were comparable in both *** 1 month of regular administration of oral magnesium sulfate,the constipation score,stool frequency and consistency improved compared to the placebo group(Pment was achieved in 31(68%)and 4(9.5%)patients in the O-mg and placebo groups,respectively(RR,2.95;95%CI 2.0-4.5)(Pmpts spent by mothers decreased from 25(55.6%)of the cases initially to 10(22%)cases after one month in the O-mg group(P=0.001).In contrast,in the placebo group,the decrease went from 21(50%)cases initially to 18(42.9%)after 1 month and was not significant(P=0.5).Conclusions Oral magnesium sulfate seems effective in alleviating chronic constipation and pain experience in children with ***,saving maternal time spent in daily bowel evacuation attempts.

关键词： Bristol stool consistency scale Constipation scale Gross motor Functional Classification system magnesium sulfate Painful bowel evacuation Spasticity

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Phase modification and dielectric properties of a cullet–paper ash–kaolin clay-based ceramic

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International Journal of minerals,metallurgy and materials 2018年第3期25卷 350-356页

作者： K.A.Samah m.R.sahar m.Yusop m.F.Omar Advance Optical material Research Group Department of Physics Faculty of Science Universiti Teknologi Malaysia

Novel ceramics from waste material made of(x) paper ash–(80-x) cullet–20 kaolin clay(10 wt% ≤ x ≤ 30 wt%) were successfully synthesized using a conventional solid-state reaction technique. Energy-dispersive X-ray analysis confirmed the presence of Si, Ca, Al, and Fe in the waste material for preparing these ceramics. The influence of the cullet content on the phase structures and the dielectric properties of these ceramics were systematically investigated. The impedance spectra were verified in the range from 1 Hz to 10 mHz at room temperature. The phase of the ceramics was found to primarily consist of wollastonite(CaSiO_3), along with minor phases of γ-dicalcium silicate(Ca_2SiO_4) and quartz(SiO_2). The sample with a cullet content of 55 wt% possessed the optimum wollastonite structure and exhibited good dielectric properties. An increase of the cullet content beyond 55 wt% resulted in a structural change from wollastonite to dicalcium silicate, a decrease in dielectric constant, and an increase in dielectric loss. All experimental results suggested that these novel ceramics from waste are applicable for electronic devices.

关键词： ceramics cullet glass paper ash wollastonite structural properties dielectric properties

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ATS:A Novel Time-Sharing CPU Scheduling Algorithm Based on Features Similarities

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Computers, materials & Continua 2022年第3期70卷 6271-6288页

作者： Samih m.mostafa sahar Ahmed Idris manjit Kaur Faculty of Computers and Information South Valley UniversityQena83523Egypt College of Industrial Engineering King Khalid UniversityAbhaSaudi Arabia School of Engineering and Applied Sciences Bennett UniversityGreater NoidaIndia

minimizing time cost in time-shared operating systems is considered basic and essential task,and it is the most significant goal for the researchers who interested in CPU scheduling *** time,turnaround time,and number of context switches are themost time cost criteria used to compare between CPU scheduling *** scheduling algorithms are divided into non-preemptive and ***(RR)algorithm is the most famous as it is the basis for all the algorithms used in *** this paper,the authors proposed a novel CPU scheduling algorithm based on *** proposed algorithm is called Adjustable Time Slice(ATS).It reduces the time cost by taking the advantage of the low overhead of RR *** addition,ATS favors short processes allowing them to run longer time than given to long *** specific characteristics of each process are;its CPU execution time,weight,time slice,and number of context *** clusters the processes in groups depending on these *** traditionalRRassigns fixed time slice for each *** the other hand,dynamic variants of RR assign time slice for each process differs from other *** essential difference between ATS and the other methods is that it gives a set of processes a specific time based on their similarities within the same *** authors compared between ATS with five popular scheduling algorithms on nine datasets of *** datasets used in the comparison vary in their *** evaluation was measured in term of time cost and the experiments showed that the proposed algorithm reduces the time cost.

关键词： Clustering CPU scheduling round robin average turnaround time average waiting time

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Arabic Fake News Detection Using Deep Learning

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Computers, materials & Continua 2022年第5期71卷 3647-3665页

作者： Khaled m.Fouad sahar F.Sabbeh Walaa medhat Faculty of Computers&Artificial Intelligence Benha UniversityEgypt University of Jeddah College of Computer Science and EngineeringJeddah21493Saudi Arabia Information Technology and Computer Science Nile UniversityEgypt

Nowadays,an unprecedented number of users interact through social media platforms and generate a massive amount of content due to the explosion of online ***,because user-generated content is unregulated,it may contain offensive content such as fake news,insults,and harassment *** identification of fake news and rumors and their dissemination on social media has become a critical *** have adverse effects on users,businesses,enterprises,and even political regimes and *** of the art has tackled the English language for news and used feature-based *** paper proposes a model architecture to detect fake news in the Arabic language by using only textual *** learning and deep learning algorithms were *** deep learning models are used depending on conventional neural nets(CNN),long short-term memory(LSTm),bidirectional LSTm(BiLSTm),CNN+LSTm,and CNN+*** datasets were used in the experiments,each containing the textual content of Arabic news articles;one of them is reallife *** results indicate that the BiLSTm model outperforms the other models regarding accuracy rate when both simple data split and recursive training modes are used in the training process.

关键词： Fake news detection deep learning machine learning natural language processing

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The impact of cold atmospheric pressure plasma jet on seed germination and seedlings growth of fenugreek(Trigonella foenum-graecum)

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Plasma Science and Technology 2019年第10期21卷 61-72页

作者： sahar A FADHLALmAWLA Abdel-Aleam H mOHAmED Jamal Q m ALmARASHI Tahar BOUTRAA Physics Department College of ScienceTaibah UniversityAl-Madinah Al-Munawarah 42353Saudi Arabia Physics Department Faculty of ScienceBeni-Suef UniversityBeni-Suef 52511Egypt Department of Biology College of SciencesUniversity of TaibahAl-Madinah Al-Munawarah 42353 Saudi Arabia

The effects of cold atmospheric-pressure plasma jet (CAPPJ) were investigated on germination and early seedling growth of fenugreek (Trigonella foenum-graecum L) seeds. A two-electrode argon CAPPJ system with and without an additional grounded electrode [accelerating grounded (AG) electrode] was used at different exposure times. After 16 h of observation, the germination rates increased by 4 and 7 times, without and with using an AG electrode, respectively, for 1 min of plasma exposure. An increase in shoot fresh weight was observed, especially at 10 min exposure time. A high dry weight of root and shoot at 1 min-AG exposure time was observed. The root:shoot ratio was lower in plasma-treated seedlings, compared with the control plants. The study found that the O-radical emission line (777.4 nm) enhanced 5 times, due to the presence of an AG electrode, which increased the axial electric field and led to the formation of more streamers. The three stated effects (O-radicals, enhancement of the electric field and streamers) could be the cause for the stimulation of seed germination and seedling growth parameters when using the CAPPJ. The scanning electron microscope images showed the etching of the seed surface layers, which was more pronounced when an AG electrode was applied. The results of the current study indicate that the germination rates increased due to the increase of O-radical concentration and the etching of the seed surfaces.

关键词： cold plasma fenugreek (Trigonella foenum-graecum) germination growth

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Towards creation of national cerebral palsy registries in Arab countries:what is missing?

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World Journal of Pediatrics 2022年第3期18卷 222-224页

作者： sahar m.A.Hassanein Tamer A.El-Sobky Division of Pediatric Neurology Department of PediatricsFaculty of MedicineAin Shams UniversityCairoEgypt Division of Pediatric Orthopedics Department of Orthopedic SurgeryFaculty of MedicineAin Shams UniversityCairoEgypt

Cerebral palsy(CP)is a global,complex and lifelong health issue with a relatively high disease burden in low-resource *** benefits of a national disease registry in general and a national CP registry in particular are twofold,namely the public health and the clinical disease-related benefits.A national CP quality registry has the potential to inform health planning and spending at national,regional and continental *** turn,this can help allocate and manage the relevant material and human resources in a more predictable and efficient manner.

关键词： benefits palsy creation

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