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33篇 您的检索式:作者名="M.Hassan"
    题名 作者 年代 出处 被引量
1GRADE指南:Ⅸ.证据质量升级显示文摘证据质量升级的最常见原因是效应量大。当方法学严谨的观察性研究表明风险至少降低或增加2倍时,GRADE建议考虑将证据质量升高1级;当风险至少降低或增加5倍时,考虑将证据质量升高2级。当存在剂量-反应关系,或所有合理的混杂、偏倚会降低明显的治疗效应,或混杂、偏倚使得结果无效为假效应时,系统评价作者和指南制定者也可考虑升高证据质量。其他考虑因素包括起效迅速、潜在的疾病(状态)趋势以及间接证据。Gordon H.Guyatt Andrew D.Oxman Shahnaz Sultan Paul Glasziou Elie A.Akl Pablo Alonso-Coello David Atkins Regina Kunz Jan Brozek Victor Montori Roman Jaeschke David Rind Philipp Dahm Joerg Meerpohl Gunn Vist Elise Berliner Susan Norris Yngve Falck-Ytter M.Hassan Murad Holger J.Schünemann 代表GRADE工作组 李幼平 杨晓妍 李玲 王应强 2011中国循证医学杂志2011,11,12:22
2颈动脉粥样硬化疾病的处理 美国血管外科学会临床实践指南显示文摘美国血管外科学会(SVS)任命了一个专家委员会制定颈动脉狭窄处理的循证临床指南。在制定临床实践推荐意见过程中,该委员会使用系统评价对当前最佳的证据进行了总结,采用GRADE标准对推荐意见的强度(强烈推荐为GRADEⅠ级,一般推荐为GRADEⅡ级)和证据的质量(高、中、低和极低)进行了分级。对于轻度颈动脉狭窄患者(有症状患者狭窄程度<50%和无症状患者狭窄程度<60%),推荐进行最佳的内科治疗而非血管重建术(Ⅰ级推荐,高质量证据)。对于有症状中到重度狭窄患者(狭窄程度≥50%),推荐行颈动脉内膜切除术(CEA)+最佳的内科治疗(Ⅰ级推荐,高质量证据)。对于围手术期风险高的有症状中到重度狭窄患者(狭窄程度≥50%),建议采用颈动脉支架置入术作为其替代治疗手段(Ⅱ级推荐,低质量证据)。对于中到重度狭窄的无症状患者(狭窄程度≥60%),只要围手术期风险较低,就推荐行CEA+内科治疗(Ⅰ级推荐,高质量证据)。对于中到重度狭窄的无症状患者(狭窄程度≥60%),不推荐行颈动脉支架置入术(Ⅰ级推荐,低质量证据)。颈动脉狭窄≥80%但存在CEA高危解剖学风险的患者可能是一个例外。Robert W.Hobson William C.Mackey Enrico Ascher M.Hassan Murad Keith D.Calligaro Anthony J.Comerota Victor M.Montori Mark K.Eskandari Douglas W.Massop Ruth L.Bush Brajesh K.Lal Bruce A.Perler 刘德志 徐格林 刘新峰 2008中华脑血管病杂志(电子版)2008,2,6:6
3Fast Multi-Pattern Matching Algorithm on Compressed Network Traffic显示文摘Pattern matching is a fundamental approach to detect malicious behaviors and information over Internet, which has been gradually used in high-speed network traffic analysis. However, there is a performance bottleneck for multi-pattern matching on online compressed network traffic(CNT), this is because malicious and intrusion codes are often embedded into compressed network traffic. In this paper, we propose an online fast and multi-pattern matching algorithm on compressed network traffic(FMMCN). FMMCN employs two types of jumping, i.e. jumping during sliding window and a string jump scanning strategy to skip unnecessary compressed bytes. Moreover, FMMCN has the ability to efficiently process multiple large volume of networks such as HTTP traffic, vehicles traffic, and other Internet-based services. The experimental results show that FMMCN can ignore more than 89.5% of bytes, and its maximum speed reaches 176.470MB/s in a midrange switches device, which is faster than the current fastest algorithm ACCH by almost 73.15 MB/s.Hao Peng Jianxin Li Bo Li M.Hassan Arif 2016China Communications2016,13,5:2
4Synthesis of ZnO Nanoparticles onto Sepiolite Needles and Determination of Their Sensitivity toward Humidity, NO_2 and H_2显示文摘This work investigated the sensitivity toward humidity,NO_2 and H_2 of Zn O modified sepiolite(Si_(12)Mg_8O_(30)(OH)_4.(H_2O)_4·8H_2O).To this aim,sepiolite powder was first modified by leaching magnesium ions in HCl then by precipitating nano-sized Zn-based compounds under basic conditions.A subsequent thermal treatment at 550°C for 1 h was performed.The powders were characterized by X-ray diffraction(XRD),specific surface area measurements,thermogravimetric and differential thermal analysis and field emission scanning electron microscopy,as well as high resolution transmission electron microscopy.The XRD patterns showed that all leached heat treated samples were made of anhydrous sepiolite and of Zn O.Sensors were then obtained by screen printing these materials onto commercial alumina substrates with Pt electrodes.All the investigated compositions were capable of detecting NO_2 down to ppm level and 20 ppm H_2,at an optimal working temperature of 300°C.These detection limits are in line with the current best results reported in literature.M.Hassan Ahmed S.Afify J.M.Tulliani 2016Journal of Materials Science & Technology2016,32,6:2
5Petrologic and geochemical characterization and mineralization of the metavolcanic rocks of the Heib Formation,Kid Metamorphic Complex,Sinai,Egypt显示文摘招待贱金属硫醚矿化作用,并且属于小孩的 Metavolcanic 岩石变形建筑群,在 Samra 涂焦油区域被暴露,南部的西奈。岩石由 rhyolite-to-andesite 作文,和他们的相等的 pyroclastics 的稍微变形的杂色的斑状的熔岩组成。Geochemically,这些 metavolcanics 作为 high-K 被分类计算碱, metaluminous 安山岩, trachyandesites, dacites,和流纹岩。这些 metavolcanics 的 geochemical 特征强烈在活跃大陆人边缘从大陆人外壳指向他们的推导。在这些 metavolcanics 的硫醚矿化作用发生在二个主要矿石地区,并且被矿化作用的四种不同式样代表。矿化作用作为低档传播或作为小巨大的衣袋发生。联系热水的改变包括 carbonatization, silicification, sericitization 和 argillic 改变。贱金属硫醚矿化作用是 epigenetic 并且被与 subduction 相关的暴烈的活动联系的热水的答案形成。Ibrahim H.Khalifa Mohammed Z.El-Bialy Doa'a M.Hassan 2011Geoscience Frontiers2011,2,3:2
6Tailoring the optical and magnetic properties of La-BaM hexaferrites by Ni substitution显示文摘We investigate the impact of Ni insertion on the structural,optical,and magnetic properties of Ba_(0.8)La_(0.2)Fe_(12-x)Ni_(x)O_(19)hexaferrites(Ni substituted La-BaM hexaferrites).Samples were prepared using the conventional co-precipitation method and sintered at 1000℃for 4 hours to assist the crystallization process.An analysis of the structure of the samples was carried out using an x-ray diffraction(XRD)spectrometer.The M-type hexagonal structure of all the samples was confirmed using XRD spectra.The lattice parameters a and c were found to be in the ranges of 5.8925±0.001 nm–5.8952±0.001 nm and 23.2123±0.001 nm–23.2219±0.001 nm,respectively.The M-type hexagonal nature of the prepared samples was also indicated by the presence of corresponding FT-IR bands and Raman modes in the FT-IR and Raman spectra,respectively.EDX results confirmed the successful synthesis of the samples according to the required stoichiometric ratio.A UV-vis spectrometer was used to record the absorption spectra of the prepared samples in the wavelength range of 200 nm–1100 nm.The optical energy bandgap of the samples was found to be in the range of 1.21 eV–3.39 eV.The M–H loops of the samples were measured at room temperature at an applied magnetic field range of 0 kOe–60 kOe.A high saturation magnetization of 99.92 emu/g was recorded in the sample with x=0 at a microwave operating frequency of 22.2 GHz.This high value of saturation magnetization is due to the substitution of La3+ions at the spin-up(12k,2a,and 2b)sites.The Ni substitution is proven to be a potential candidate for the tuning of the optical and magnetic parameters of M-type hexaferrites.Therefore,we suggest that the prepared samples are suitable for use in magneto-optic applications.Hafiz T.Ali MRamzan M Imran Arshad Nicola A.Morley M.Hassan Abbas Mohammad Yusuf Atta Ur Rehman Khalid Mahmood Adnan Ali Nasir Amin MAjaz-un-Nabi 2022Chinese Physics B2022,31,2:1
7Growth of monodisperse nanospheres of MnFe_2O_4 with enhanced magnetic and optical properties显示文摘Highly dispersive nanospheres of MnFe2O4are prepared by template free hydrothermal method.The nanospheres have 47.3-nm average diameter,narrow size distribution,and good crystallinity with average crystallite size about 22 nm.The reaction temperature strongly affects the morphology,and high temperature is found to be responsible for growth of uniform nanospheres.Raman spectroscopy reveals high purity of prepared nanospheres.High saturation magnetization(78.3 emu/g),low coercivity(45 Oe,1 Oe = 79.5775 A·cm-1),low remanence(5.32 emu/g),and high anisotropy constant2.84 × 104J/m3(10 times larger than bulk) are observed at room temperatures.The nearly superparamagnetic behavior is due to comparable size of nanospheres with superparamagnetic critical diameter D spm cr.The high value of K eff may be due to coupling between the pinned moment in the amorphous shell and the magnetic moment in the core of the nanospheres.The nanospheres show prominent optical absorption in the visible region,and the indirect band gap is estimated to be 0.98 eV from the transmission spectrum.The prepared Mn ferrite has potential applications in biomedicine and photocatalysis.M.Yasir Rafique 潘礼庆 Qurat-ul-ain Javed M.Zubair Iqbal 邱红梅 M.Hassan Farooq 郭振刚 M.Tanveer 2013Chinese Physics B2013,22,10:1
8Association of diabetes duration and diabetes treatment with the risk of hepatocellular carcinoma显示文摘Manal M.Hassan Steven A.Curley DonghuiLi AhmedKaseb MartaDavila Eddie K.Abdalla MilindJavle Dalia M.Moghazy Richard D.Lozano James L.Abbruzzese Jean‐NicolasVauthey 2010Cancer2010,,8:1
9Association of diabetes duration and diabetes treatment with the risk of hepatocellular carcinoma显示文摘Manal M.Hassan Steven A.Curley DonghuiLi AhmedKaseb MartaDavila Eddie K.Abdalla MilindJavle Dalia M.Moghazy Richard D.Lozano James L.Abbruzzese Jean‐NicolasVauthey 2010Cancer2010,,8:1
10Ion-Acoustic Rogue Waves in Multi-ion Plasmas显示文摘The basic properties of nonlinear ion-acoustic(IA) waves(IAWs), particularly finite amplitude IA rogue waves(IARWs) in a plasma medium(containing pair ions, iso-thermal positrons, and non-thermal electrons) are theoretically investigated by deriving the nonlinear Schr¨odinger equation(NLSE).The criteria for the modulational instability of IAWs, and the basic features of finite amplitude IARWs are identified.The modulationally stable and unstable regions are determined by the sign of the ratio of the dispersive coefficient to the nonlinear coefficient of NLSE.The latter is analyzed to obtain the region for the existence of the IARWs, which corresponds to the unstable region.The shape of the profile of the rogue waves depends on the non-thermal parameter α and the ratio of electron temperature to positron temperature.It is found that the increase in the value of the non-thermal parameter enhances both the amplitude and width of IARWs, and that the enhancement of electron(positron) temperature reduces(enhances) the amplitude and width of IARWs.It is worth to mention that our present investigation may be useful for understanding the salient features of IARWs in space(viz., upper region of Titan’s atmosphere, cometary comae, and Earth’s ionosphere, etc.)and laboratory(viz., plasma processing reactor and neutral beam sources, etc.) plasmas.M.Hassan M.H.Rahman N.A.Chowdhury A.Mannan A.A.Mamun 2019Communications in Theoretical Physics2019,71,8:1
11埃及阿赫米姆古墓遗址浅层地球物理勘查(英文)显示文摘测地雷达,电磁勘探以及电法层析成像联合应用于古遗址的勘查,证明是有效的方法。我们已经在阿赫米姆古墓遗址进行过地球物理测量,测量的主要目标是确定掩埋构造以便进一步的挖掘。地球物理资料是利用GEM-300多频率电导率剖面,SIR-2000测地雷达,以及Syscal R2电阻率测量系统采集的。综合解释结果显示许多特征和一条明显的宽一米带,这与预测的一条掩埋围墙的走向一致。每一边都有两个平行当波峰,表明两条平行围墙东西延伸,并在左下角有一个空间。此外,对临近博物馆的测地雷达和双偶极电阻率剖面的解释认为在先前发现的雕像右边有拉姆齐二世道第二个雕像,这个雕像可能还埋在沙里。Mahfooz A.Hafez Magdy A.Atya Azza M.Hassan Motoyuki Sato Thomas Wonik Abeer A.El-Kenawy 2008Applied Geophysics2008,5,2:1
12Fracture behavior of bainitic and pearlitic rail steel webs显示文摘H.AGLAN M.HASSAN Z.LIU 0,,:1
13From Baecklund Transformation to a Linear System of Sine-Gordon Theory in Superspace显示文摘A systematic approach is presented to find a linear system associated with the sine-Gordon equation from a given set of super Riccati systems. The Riccati system is shown to be related to the super B(ae)cklund transformation and the linear eigenvalue problem.M.Siddiq M.Hassan 2005Chinese Physics Letters2005,22,7:1
14Performance evaluation of LPG desulfurization by adsorption for hydrogen production显示文摘The adsorption of sulfur compounds,in commercially available LPG,has been studied using different adsorbents,namely Zeolite,Zn O and house made date pits activated carbon(DP-AC). It was found that the three adsorbents are capable of effectively removing sulfur compounds at different feed sulfur concentrations. The effects of height to diameter aspect ratio of the adsorption column,flow rate of LPG and input sulfur concentrations have been studied. A first order kinetics model has been used to describe the adsorption,and the kinetics constant was found to increase by increasing the flow rate of LPG and decrease by increasing the amount of adsorbent used. The developed model described the system fairly well,and can be used in designing and scaling-up of fixed-bed adsorption columns.S.Al-Zuhair A.Khalil M.Hassan A.Abdulrazak K.Basel A.Fardounc 2015Journal of Energy Chemistry2015,24,4:1
15Structural and Optical Characteristics of Silica Nanotubes Using CNTs as Template显示文摘Silica coated multi-wall carbon nanotubes(MWCNTs),silica@MWCNTs and nanocomposites were synthesized by a sol-gel method.By using the synthesized nanocomposites and also CNTs as templates,silica nanotubes(silica-NTs) were prepared.The optical properties of fabricated nanocomposites and nanotubes were characterized by back-scattering micro Raman,UV/Vis/NIR and FT-IR spectra,which show the presence of CNTs structure in the nanocomposites.UV/Vis/NIR and FT-IR spectra also show the presence of silica compounds.The recorded spectra from UV/Vis/NIR and FT-IR also confirm the presence of silica compounds in the nanotubes.The results of FE-SEM imaging data indicate that the synthesized samples are MWCNTs coated uniformly by silica molecules,which act as the template to synthesize silica-NTs.Rasoul Malekfar M.Hassan Rajabi M.Hossein Majless Ara 2010Nano-Micro Letters2010,2,4:1
16Synthesis and evaluation of some new oxazolones and imidazolones as antioxidant additives for Egyptian lubricating oils显示文摘Oxazolone derivative 2 was utilized as a key intermediate for synthesis of some new oxazolone and imidazolone derivatives. Reaction of oxazolone derivative 2 with diamines under different conditions afforded the corresponding imidazolone derivatives 3-8, respectively. Moreover, oxazolone 2 reacted with some heterocyclic amines in glacial acetic acid giving the corresponding imidazolone derivatives 9-14, respectively. Cyclocondensation of thiosemicarbazide with compound 2 in dry pyridine afforded compound 15. Addition of secondary amines to olefin double bond of compound 2 gave the corresponding addition products 16-19, respectively. Michael addition of compound 2 with some active methylene compounds afforded oxazolone derivatives 20-23, respectively. These prepared products were evaluated as antioxidant and corrosion inhibitors for gasoline lubricating oil and compounds 6a-c, 10 and 15 exhibited the highest antioxidant and anticorrosive activities. The effect of concentration of additives was studied to recommend the optimum concentration to be used. The results showed, for additive 15, 0.1 g for 1 L oil was the more effective concentration. Measurements for thermal analysis and of surface tension of oil after oxidation were also carried out.Ahmed El-Mekabaty Osman M.O.Habib Hussein M.Hassan Evelin B.Moawad 2012Petroleum Science2012,9,3:1
17Incidence of orbital,conjunctival and lacrimal gland malignant tumors in USA from Surveillance,Epidemiology and End Results,1973-2009显示文摘AIM: To determine the types and incidence of tumors affecting the orbit, conjunctiva and lacrimal glands and to study the trend line of these tumors in the United States from 1973 to 2009.·METHODS: We used the publicly available Surveillance,Epidemiology and End Results(SEER) database registries to determine the incidence rates. Age was adjusted to the 2000 US Standard Population. Patients were stratified according to age group, gender, race and histological grouping of tumor lesions. Three age groups were defined: 0-19, 20-49 and ≥50y. Annual percentage changes were calculated to examine trends.·RESULTS: The overall age adjusted incidence rate was3.39(95% CI: 3.27-3.52) per million person-years. The tumors were more prevalent in age group ≥50 counting9.51(95%CI: 9.11-9.92) per million person-years. Most of the soft tissue sarcomas occurred in the young age with incidence rate of 0.35(95% CI: 0.28-0.42) per million person-years. Lymphomas were the dominant subtype in the adult population with incidence rate of 5.74(95% CI:5.43-6.06) per million person-years. Incidence rates were higher in males than females with an overall rate ratio of1.31(95%CI: 1.21-1.41) mainly caused by the increase in carcinoma subtypes. White race had a higher tumor incidence with a rate ratio of 1.47(95% CI: 1.25-1.73)driven by the higher incidence of most histological subtypes. Orbital tumors showed a higher incidence rate followed by conjunctival and lacrimal gland tumors with incidence rates of 1.59, 1.37 and 0.43 per million personyears respectively. The trend line of overall incidence of tumors showed a significant increase(APC=3.11, 95%CI:2.61-3.61) mainly due to increase of lymphomas. This increase was higher than the increase of lymphomas at other sites.·CONCLUSION: Orbital, conjunctival and lacrimal gland malignant tumors differ among children and adults. Over the years there has been a noticeable increase in incidence rates of orbital and lacrimal gland tumors mainly caused by an increase in lymphomas and an apparent increase due to advances in diagnostic techniques. ICD-O-3 topographical coding should be improved to consider the different orbital bones and ocular structures.Waleed M.Hassan Mohamed S.Bakry Housam M.Hassan Ahmad S.Alfaar 2016International Journal of Ophthalmology(English edition)2016,9,12:1
18Pulsed ion beam-assisted carburizing of titanium in methane discharge显示文摘The carburizing of titanium (Ti) is accomplished by utilizing energetic ion pulses of a 1.5 kJ Mather type dense plasma focus (DPF) device operated in methane discharge. X-ray diffraction (XRD) analysis confirms the deposition of polycrystalline titanium carbide (TiC). The samples carburized at lower axial and angular positions show an improved texture for a typical (200)TiC plane. The Williamson-Hall method is employed to estimate average crystallite size and microstrains in the carburized Ti surface. Crystallite size is found to vary from ~ 50 to 100 nm, depending on the deposition parameters. Microstrains vary with the sample position and hence ion flux, and are converted from tensile to compressive by increasing the flux. The carburizing of Ti is confirmed by two major doublets extending from 300 to 390 cm-1 and from 560 to 620 cm-1 corresponding to acoustic and optical active modes in Raman spectra, respectively. Analyses by scanning electron microscopy/energy dispersive x-ray spectroscopy (SEM/EDS) have provided qualitative and quantitative profiles of the carburized surface. The Vickers microhardness of Ti is significantly improved after carburizing.M.Shafiq M.Hassan K.Shahzad A.Qayyum S.Ahmad R.S.Rawat M.Zakaullah 2010Chinese Physics B2010,19,1:1
19静脉注射异丙酚引起的急性胰腺炎:通过系统综述评估其因果关系显示文摘背景:异丙酚注射引起急性胰腺炎(AP)已有报道,但两者之间的因果关系尚不明了。因此,我们通过系统综述对其因果关系进行评估。方法:我们于2017年8月16日对多个数据库进行检索,由两人按预设标准对检索出的研究进行评估和筛选。使用Naranjo量表和Badalov分级评估异丙酚注射与AP的因果关系。结果:我们筛选出来自11个国家的18项研究,病例总数为21例,大多数研究都有高质量的方法学。21例患者中位年龄35岁(4-77岁),10例(48%)为男性。8例患者注射异丙酚是用于镇静,13例为麻醉诱导/维持,异丙酚中位注射剂量为200 mg。14例(67%)患者具有一个中等时长(1-30天)的潜伏期(异丙酚注射至AP诊断)。4例患者甘油三酯水平>1000 mg/dL。4例(19%)患者出现严重AP。2例患者在AP治疗好转后再次接受异丙酚注射,其中1例出现了AP复发。AP相关病死率为14%(3/21)。按Naranjo量表评估,在19例(89%)患者中,异丙酚注射是AP的可能原因。结论:在Badalov Ib级别的证据支持下,可以认为异丙酚注射是AP发生的一个可能原因。高甘油三酯血症并不是异丙酚诱发AP的唯一机制。异丙酚引起的AP中,有19%为严重AP,病死率高达14%。未来研究需要评估如果合并应用其他一些本身就有导致胰腺炎风险的操作(如ERCP),异丙酚引起的AP发生概率是否会增加。Samir Haffar Ravinder Jeet Kaur Sushil Kumar Garg Joseph A.Hyder M.Hassan Murad Barham K.Abu Dayyeh Fateh Bazerbachi 2019Gastroenterology Report2019,7,1:1
20Tannin Nanoparticles(NP99)Enhances the Anticancer Effect of Tamoxifen on ER+Breast Cancer Cells显示文摘Recently,natural substances in the form of nanoparticles are increasingly being used in different field,particularly in medicines to enhance their beneficial effects in treatment and prevention.Cancer cells of the breast(MCF-7)have been chosen to be examined and treated in vitro with conventional drug Tamoxifen(Tam)and tannin nanoparticles extract(NP99)individually or in combination.MTT reagent has been applied to assess the cell viability and propagation percentage,DNA fragmentation and mRNA relative expression of apoptotic genes to study the cell death pathway.The results showed that Tam and tannin NP99 triggered cytotoxic activity towards the MCF7 cell.They reduce the viability and induced high potent repressive activity on cell proliferation percentage and induced apoptosis as indicated by rising the percentage in DNA fragmentation.Effect of NP99 extract exhibited its effect in a dose and time-varying.The combined treatment of Tam and NP99 were much more efficient than individual drugs.It could be concluded that NP99 is considered a promising natural anticancer agent as a new tool in therapeutic strategies.Faizah A.AlMalki Aziza M.Hassan Zeinab M.Klaab Soliman Abdulla Antonio Pizzi 2021Journal of Renewable Materials2021,9,12:0
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