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| 1 | Acousto-optical modulation of thin film lithium niobate waveguide devices显示文摘Due to its strong piezoelectric effect and photo-elastic property, lithium niobate is widely used for acousto-optical applications. However, conventional bulk lithium niobate waveguide devices exhibit a large footprint and limited light–sound interaction resulting from the weak guiding of light. Here, we report the first acousto-optical modulators with surface acoustic wave generation, phononic cavity, and low-loss photonic waveguide devices monolithically integrated on a 500 nm thick film of lithium niobate on an insulator. Modulation efficiency was optimized by properly arranging the propagation directions of surface acoustic waves and optical guided modes.The effective photo-elastic coefficient extracted by comparing the first and third harmonic modulation signals from an on-chip Mach–Zehnder interferometer indicates the excellent acousto-optical properties of lithium niobate are preserved in the thin film implementation. Such material property finding is of crucial importance in designing various types of acousto-optical devices. Much stronger amplitude modulation was achieved in a high Q(>300,000) optical resonator due to the higher optical sensitivity. Our results pave the path for developing novel acousto-optical devices using thin film lithium niobate. | LUTONG CAI ASHRAF MAHMOUD MSI KHAN MOHAMED MAHMOUD TAMAL MUKHERJEE JAMES BAIN GIANLUCA PIAZZA | 2019 | Photonics Research2019，7，9： | 5 |
| 2 | Occult hepatitis B virus infection in Egypt显示文摘The emerging evidence of the potentially clinical importance of occult hepatitis B virus(HBV) infection(OBI) increases the interest in this topic. OBI may impact in several clinical contexts, which include the possible transmission of the infection, the contribution to liver disease progression, the development of hepatocellular carcinoma, and the risk of reactivation. There are several articles that have published on OBI in Egyptian populations. A review of MEDLINE database was undertaken for relevant articles to clarify the epidemiology of OBI in Egypt. HBV genotype D is the only detectable genotype among Egyptian OBI patients. Higher rates of OBI reported among Egyptian chronic HCV, hemodialysis, children with malignant disorders, and cryptogenic liver disease patients. There is an evidence of OBI reactivation after treatment with chemotherapy. The available data suggested that screening for OBI must be a routine practice in these groups of patients. Further studies needed for better understand of the epidemiology of OBI among Egyptian young generations after the era of hepatitis B vaccination. | Ashraf Elbahrawy Alshimaa Alaboudy Walid El Moghazy Ahmed Elwassief Ahmed Alashker Abdallah Mahmoud Abdallah | 2015 | World Journal of Hepatology2015，7，12： | 3 |
| 3 | Novel non-invasive biological predictive index for liver fibrosis in hepatitis C virus genotype 4 patients显示文摘AIM To investigate the diagnostic ability of a non-invasive biological marker to predict liver fibrosis in hepatitis C genotype 4 patients with high accuracy.METHODS A cohort of 332 patients infected with hepatitis C genotype 4 was included in this cross-sectional study. Fasting plasma glucose, insulin, C-peptide, and angiotensinconverting enzyme serum levels were measured. Insulin resistance was mathematically calculated using the homeostasis model of insulin resistance(HOMA-IR).RESULTS Fibrosis stages were distributed based on Metavir score as follows: F0 = 43, F1 = 136, F2 = 64, F3 = 45 and F4 = 44. Statistical analysis relied upon reclassification of fibrosis stages into mild fibrosis(F0-F) = 179, moderate fibrosis(F2) = 64, and advanced fibrosis(F3-F4) = 89. Univariate analysis indicated that age, log aspartate amino transaminase, log HOMA-IR and log platelet count were independent predictors of liver fibrosis stage(P < 0.0001). A stepwise multivariate discriminant functional analysis was used to drive a discriminative model for liver fibrosis. Our index used cut-off values of ≥ 0.86 and ≤-0.31 to diagnose advanced and mild fibrosis, respectively, with receiving operating characteristics of 0.91 and 0.88, respectively. The sensitivity, specificity, positive predictive value, negative predictive value and positive likelihood ratio were: 73%, 91%, 75%, 90% and 8.0 respectively for advanced fibrosis, and 67%, 88%, 84%, 70% and 4.9, respectively, for mild fibrosis.CONCLUSION Our predictive model is easily available and reproducible, and predicted liver fibrosis with acceptable accuracy. | Mahmoud Khattab Mohamed Amin Sakr Mohamed Abdel Fattah Youssef Mousa Elwy Soliman Ashraf Breedy Mona Fathi Salwa Gaber Ahmed Altaweil Ashraf Osman Ahmed Hassouna Ibrahim Motawea | 2016 | World Journal of Hepatology2016，8，32： | 2 |
| 4 | HepG2 cells support viral replication and gene expression of hepatitis C virus genotype 4 in vitro显示文摘瞄准:与丙肝的长期的复制建立一个房间文化系统病毒(HCV ) 染色体和病毒的抗原的表示在试管内。方法:HepG2 房间线被孵化与长期的丙肝从一个病人与浆液为它的危险性测试到 HCV。房间和上层清液在文化期间在各种各样的时间点被收获。文化上层清液为它感染天真的房间的能力被测试。存在减(反感觉) 在房间的核心和 E1 抗原的 RNA 海滨,和察觉被 RT-PCR 和免疫学的技术(流动血细胞计数和西方的污点) 分别地检验。结果:细胞内部的 HCV RNA 首先在 d 上被检测 3 在感染以后然后能一致地在至少三个月的一个时期上在房间和上层清液被检测。新鲜房间能从有教养的感染的房间感染上层清液。流动 cytometric 分析证明表面和在房子里使用的细胞内部的 HCV 抗原表示使 polyclonal 成为了抗体(反核心,和 anti-E1 ) 。西方的污点分析证明在分子量的产生免疫性的肽的簇的表示在一个月内在 31 和 45 kDa 之间延长了感染的房间的旧文化而这簇在 uninfected HepG2 房间是无法发现的。结论:HepG2 房间线产生 HCV 感染而且支持它的复制在试管内不仅。HCV 结构的蛋白质的表示能在感染的 HepG2 房间被检测。这些房间也能够流病毒的粒子进接着对 uninfected 房间变得传染的培养基。 | Mostafa K El-Awady Ashraf A Tabll Yasmine S El-Abd Mahmoud M Bahgat Hussein A Shoeb Samar S Youssef Noha G Bader El Din El-Rashdy M Redwan Maha El-Demellawy Moataza H Omran Wael T El-Garf Said A Goueli | 2006 | World Journal of Gastroenterology2006，12，30： | 2 |
| 5 | Biomechanical and morphological corneal response to placement of intrastromal corneal ring segments for keratoconus显示文摘 | Caroline Dauwe David Touboul Cynthia J. Roberts Ashraf M. Mahmoud Julien Kérautret Pierre Fournier Fran?ois Malecaze Joseph Colin | 2009 | Journal of Cataract & Refractive Surgery2009，，10： | 1 |
| 6 | Amblyopia screening for first and second-grade children in Jordan显示文摘AIM:To share the results of a national screening program for amblyopia in school children in the north of Jordan.METHODS:This is a prospective national screening study for amblyopia.The program rolls first and second-grade children(6 to 7 years old) in the north of Jordan.The eye examination included:best-corrected visual acuity,cover-uncover test,and cycloplegic retinoscopy.Monocular visual acuity was tested using an ETDRS visual acuity chart without correction.Moreover,children were tested with full cycloplegic refraction when the test criteria were met.Unilateral amblyopia was defined as a best-corrected visual acuity difference of 2 or more lines.In comparison,bilateral amblyopia was defined as a best-corrected visual acuity of 20/40 or worse in the best eye.RESULTS:The prevalence of amblyopia for the total sample tested(n=17 203) was 2.78%(n=479).The most common cause of amblyopia was hypermetropia(64.45%),followed by previous ocular surgeries(15.1%),myopia(10.43%),strabismus(9.39%),and congenital cataract(0.63%).CONCLUSION:This is the first and only study,identifing modifiable risk factors in Jordanian children with amblyopia.In their first couple of years of elementary education,many Jordanian children are affected by amblyopia and pass unnoticed.A more governmental effort is needed into screening programs to improve vision in the Jordanian population. | Khalil M.Al-Salem Mohammad S.Saleem Ismat Ereifej Hamzeh M.Alrawashdeh Rayed Falah Hussein Obeidat Asma Ali Abdlmohdi Raeda Zaki Al-Momani Layal Mohammed Hammad Omar Ahmad al-Habahbeh Yaqeen M.Assassfeh Laith Ramzi Najib Al-Qsous Ashraf Hatim Adeeb Nasraween Tariq A.Al Maaitah Deya'-Aldin Muneer Hasan Aqeel Ibtehal Eyadeh Awad Alabdulrazzg Abdullah Mahmoud Mohammad Murad Amany Jehad Faleh AL-Zurqan Enas Jamal Mohammad Jaradat Slsabela Emad Suliman Aldhoon Ala'a Majed Dmour Ahmad Talal Asassfeh Jeries Ayman Halaseh Abdel Aziz Ammar Daoud Waha Ayman Alkasasbeh Kholoud GH.Matar | 2022 | International Journal of Ophthalmology(English edition)2022，15，2： | 1 |
| 7 | Extensions of TO/SIS for large scale multi-objective non-linear programming problems with block angular structure显示文摘 | MAHMOUD A A AZZA H A ASHRAF S I | 2008 | Applied Mathematical Modelling2008，32，3： | 1 |
| 8 | Serum eosinophilic cationic protein and high sensitive C-reactive protein as alternative parameters for differentiation of severity stages and monitoring control in bronchial asthmapatients显示文摘 | Ashraf ES Sameh E Mahmoud SM | 2014 | Egypt J Chest Disea Tuberculo2014，63，4： | 1 |
| 9 | Mitochondrial dysfunction as the cause of the failure to precondition the diabetic human myocardium显示文摘 | Ashraf H Mahmoud L Bashir M | 2006 | Cardiovascular Research2006，69，45： | 1 |
| 10 | Multi-band operation of a compact H-shaped microstrip anterma显示文摘 | Abdel Fattah Sheta Ashraf Mohra Samir F Mahmoud | 2002 | Microwave Opt Tech Lett2002，35，5： | 1 |
| 11 | Synthesis and Characterization of Tetra-Functional Epoxy Resins from Rosin显示文摘 | Ayman M. Atta R. Mansour Mahmoud I. Abdou Ashraf M. El-Sayed | 2005 | Journal of Polymer Research2005，，2： | 1 |
| 12 | Efficacy and survival analysis of percutaneous radiofrequency versus microwave ablation for hepatocellular carcinoma: an egyptian multidisciplinary clinic experience显示文摘 | Ashraf Abdelaziz Tamer Elbaz Hend Ibrahim Shousha Sherif Mahmoud Mostafa Ibrahim Ahmed Abdelmaksoud Mohamed Nabeel | 2014 | Surgical Endoscopy2014，，12： | 1 |
| 13 | Microwave ablation versus transarterial chemoembolization in large hepatocellular carcinoma: prospective analysis显示文摘 | Ashraf Omar Abdelaziz Mohamed Mahmoud Nabeel Tamer Mahmoud Elbaz Hend Ibrahim Shousha Eman Medhat Hassan Sherif Hamdy Mahmoud Noha Ali Rashed Mostafa Mohamed Ibrahim Ahmed Hosni Abdelmaksoud | 2014 | Scandinavian Journal of Gastroenterology2014，，4： | 1 |
| 14 | Results of whole brain radiotherapy in patients with brain metastases from breast cancer:a retrospective study 显示文摘 | Ashraf S Mahmoud - Ahmed John HS | 2002 | Int J Radiat Oncol Biol Phys2002，54，3： | 1 |
| 15 | An overview of liquid phase microextraction approaches combined with UV-Vis spectrophotometry显示文摘 | Malihe Dehghani Mohammad Abadi Narges Ashraf Mahmoud Cham-saz | | 0，，： | 1 |
| 16 | Extensions of TOPSIS for large scale multi-objective non-linear programming problems with block angular structure显示文摘 | Mahmoud A. Abo-Sinna Azza H. Amer Ashraf S. Ibrahim | 2006 | Applied Mathematical Modelling2006，，3： | 1 |
| 17 | Spectrophotometric determination of H 2 -receptor antagonists via their oxidation with cerium(IV)显示文摘 | Ibrahim A. Darwish Samiha A. Hussein Ashraf M. Mahmoud Ahmed I. Hassan | 2007 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy2007，，1： | 1 |
| 18 | Adaptive radio resource with borrowing for multi-opera- tors 3G+ wireless networks with heterogeneous traffic 显示文摘 | Salman A1Qahtani Ashraf S Mahmoud Asrar U Sheikh | 2006 | Computer Communications ELSEVIER2006，29，15： | 1 |
| 19 | Minimally Invasive Video-Assisted Thyroidectomy for Small Follicular Thyroid Nodules显示文摘 | Mohamed A. F. Hegazy Ashraf A. Khater Ahmed E. Setit Mahmoud A. Amin Sherif Z. Kotb Mohamed A. El Shafei Tamer F. Yousef Osama Hussein Yousef K. Shabana Ola T. Abdel Dayem | 2007 | World Journal of Surgery2007，，9： | 1 |
| 20 | Partial Splenic Embolization Versus Splenectomy for the Management of Hypersplenism in Cirrhotic Patients显示文摘 | Mahmoud A. Amin Mohamed M. El Gendy Ibrahim E. Dawoud Ashraf Shoma Ahmed M. Negm Talal A. Amer | 2009 | World Journal of Surgery2009，，8： | 1 |
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