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    题名 作者 年代 出处 被引量
1Transboundary hydrological effects of hydropower dam construction on the Lancang River显示文摘HE Daming FENG Yan GAN Shu Darrin Magee YOU Weihong 2006Chinese Science Bulletin2006,51,B11:13
2A Survey of Downlink Non-Orthogonal Multiple Access for 5G Wireless Communication Networks显示文摘Non-orthogonal multiple access(NOMA) has been recognized as a promising multiple access technique for the next generation cellular communication networks. In this paper, we first discuss a simple NOMA model with two users served by a single-carrier simultaneously to illustrate its basic principles. Then, a more general model with multicarrier serving an arbitrary number of users on each subcarrier is also discussed. An overview of existing works on performance analysis, resource allocation, and multiple-in-put multiple-output NOMA are summarized and discussed. Furthermore, we discuss the key features of NOMA and its potential research challenges.WEI Zhiqiang YUAN Jinhong Derrick Wing Kwan Ng Maged Elkashlan DING Zhiguo 2016ZTE Communications2016,14,4:8
3CdS/聚合物梯形产氢光催化剂及其原位光照电子转移机制显示文摘氢气是公认的洁净、高效、可再生的能源载体,有望替代目前广泛使用的化石燃料.太阳能光催化产氢是实现高效、低成本、可持续生产氢能的一种途径.然而,单一组分光催化剂的性能受限于光生电子-空穴的快速复合,并且不能同时满足宽的太阳光吸收范围和强的氧化还原能力的要求,因此需要构建异质结来增强光生载流子的分离并保持高效光吸收和强氧化还原能力.异质结包括II型异质结、Z型(分为传统Z型和全固态Z型)异质结和梯型(Step-scheme,S型)异质结.在II型异质结中,光生电子从较高迁移至较低的导带,而光生空穴从较低迁移至较高的价带.该原理中光生载流子的转移会使其氧化还原能力降低,同时光生电子-空穴间的吸引和同种电荷间的互斥不利于载流子的转移.Z型异质结利用溶解的氧化还原离子对(传统的Z型异质结)或导电材料(全固态Z型异质结)作为电荷转移和分离的穿梭器.然而,具有更强氧化还原能力的光生载流子会优先与该离子对反应或通过导电材料复合,使氧化还原能力下降.S型异质结通过费米能级差产生的电荷转移形成内建电场,在光照下,内建电场促使氧化还原能力较弱的电子-空穴对结合,而保留氧化还原能力强的电子-空穴对,增强光生载流子的传递分离与光催化剂的活性.目前,Cheng等(Adv.Mater.,2021,33,2100317)通过原位生长硫化镉(CdS)与芘-三苯胺交替共聚物(PT),形成一种无机有机梯型(S型)复合异质结光催化剂(CP).负载了1%Pt助催化剂的2%PT/CdS光催化剂显示出高达9.28 mmol h^(-1) g^(-1)的产氢速率,较好的性能归因于S型异质结的高电子-空穴分离效率和强氧化还原活性.利用开尔文探针和原位光照X射线光电子能谱(ISI-XPS)研究了S型异质结的电子转移机理.在光照下,CdS的电势升高而PT的电势降低,说明CdS中的光生电子转移至PT与其中的光生空穴结合,这与S型异质结的电子转移机理是一致的.CdS的ISI-XPS谱图结果表明,在黑暗条件下,CP中Cd 3d和S 2p的结合能低于它们在CdS中的结合能,说明有电子净流入CdS使其结合能降低;在光照下,Cd 3d和S 2p的结合能则升高,说明电子由CdS转移至PT中.该S型异质结光催化剂成功光催化分解水制氢的案例表明,该研究方向具有潜力.S.Wageh Ahmed A.Al-Ghamdi Omar A.Al-Hartomy Maged F.Alotaibi 王临曦 2022Chinese Journal of Catalysis2022,43,3:6
4Emergency department procedural sedation for primary electrical cardioversion — a comparison with procedural sedations for other reasons显示文摘BACKGROUND: Atrial fibrillation(AF) is the most common arrhythmia treated in the emergency department(ED), with primary electrical cardioversion(PEC) the preferred method of rhythm control. Anecdotally, patients undergoing ED procedural sedation(EDPS) for PEC differ from those requiring EDPS for other procedures: they are at higher risk of adverse events, and require fewer drugs and lower doses. We attempt to verify this using an EDPS registry at a Canadian, tertiary care teaching hospital.METHODS: This is a retrospective review of patients that underwent EDPS for the period of June 2006 to September 2014. We compared demographics, medication use and intra-procedural adverse events between those receiving EDPS for PEC for AF compared to that for other indications. We report the asssociation between AEs and predictors using logistic regression.RESULTS: A total of 4 867 patients were included, 714 for PEC for AF and 4 153 for other indications. PEC patients were more likely male(58.5% vs. 47.1%), older(59.5 years vs. 48.1 years), and less likely to be ASA I(46.6% vs. 69.0%). PEC patients received smaller doses of propofol and less likely to receive adjuvant analgesic therapy(11.5% vs. 78.2%). PEC patients were more likely to experience hypotension(27.6% vs. 16.5%) but respiratory AEs(apnea, hypoxia and airway intervention) were not different.CONCLUSION: EDPS for PEC differs from that conducted for other purposes: patients tend to be less healthy, receive smaller doses of medication and more likely to suffer hypotension without an increase in respiratory AEs. These factors should be considered when performing EDPS.Michael Butler Patrick Froese Peter Zed George Kovacs Robert Mac Kinley Kirk Magee Mary-Lynn Watson Samuel G.Campbell 2017World Journal of Emergency Medicine2017,8,3:6
5地震作用下盾构隧道环缝单向振动防水性能试验显示文摘为研究盾构隧道管片接缝弹性密封垫在地震作用下的防水性能,以在高烈度地震区修建的大断面海底盾构隧道——苏埃通道工程为依托,根据隧道环缝防水指标,研制了可模拟地震作用下的管片环缝单向振动防水试验装置,通过不同环缝张开量下单向振动防水试验,与未考虑地震作用时对应的张开与错动工况下静态防水试验结果进行对比,得出了张开量增大对密封垫防水性能的影响,并提出了弹性密封垫振动防水与静态防水的对应指标.结果表明:单向振动作用下弹性密封垫发生渗漏时,水呈喷射状而非缓慢流出,张开量的增大较错动量增大更易使弹性密封垫防水性能显著降低;随着环缝张开量的变化,单向振动耐水压值为0.2~1.4 MPa,静态耐水压值为0.1~1.1 MPa;单向振动作用下环缝弹性密封垫的防水性能约为静态时防水性能的45%~78%.谢宏明 何川 封坤 梁敏飞 李策 AL-SEBAEAI Maged 2020西南交通大学学报2020,55,4:6
63-D visualizations of coastal bathymetry by utilization of airborne TOPSAR polarized data显示文摘Multi-frequency C and L bands in the TOPSAR data have been utilized to reconstruct three-dimensional(3-D)bathymetry pattern.The main objective of this study is to utilize fuzzy arithmetic to reduce the errors arising from speckle in synthetic aperture radar(SAR)data when constructing ocean bathymetry from polarized SAR data.In doing so,two 3-D surface models,the Volterra algorithm and a fuzzy B-spline(FBS)algorithm,which construct a global topological structure between the data points,were used to support an approximation to the real surface.Volterra algorithm was used to express the non-linearity of TOPSAR data intensity gradient based on the action balance equation(ABC).In this context,a first-order kernel of Volterra algorithm was used to express ABC equation.The inverse of Volterra algorithm then performed to simulate 2-D current velocities from CVV and LHH band.Furthermore,the 2-D continuity equation then used to estimate the water depth.In order to reconstruct 3-D bathymetry pattern,the FBS has been performed to water depth information which was estimated from 2-D continuity equation.The best reconstruction of coastal bathymetry of the test site in Kuala Terengganu,Malaysia,was obtained with polarized L and C bands SAR acquired with HH and VV polarizations,respectively.With 10 m spatial resolution of TOPSAR data,bias of0.004 m,the standard error mean of 0.023 m,r2 value of 0.95,and 90%confidence intervals in depth determination was obtained with LHH band.Maged Marghany Arthur P.Cracknell Mazlan Hashim 2010International Journal of Digital Earth2010,3,2:5
7The presence of a cytopathologist increases the diagnostic accuracy of endoscopic ultrasound‐guided fine needle aspiration cytology for pancreatic adenocarcinoma: a meta‐analysis显示文摘S. Hébert‐Magee S. Bae S. Varadarajulu J. Ramesh A. R. Frost M. A. Eloubeidi I. A. Eltoum 2013Cytopathology2013,,3:4
8Occult hepatitis B virus infection among Egyptian blood donors显示文摘AIM:To identify blood donors with occult hepatitis B virus(HBV) infection(OBI) to promote safe blood donation.METHODS:Descriptive cross sectional study was conducted on 3167 blood donors negative for hepatitis B surface antigen(HBsAg),hepatitis C antibody(HCV Ab) and human immunodeficiency virus Ab.They were subjected to the detection of alanine aminotransferase(ALT) and aspartate transaminase(AST) and screening for anti-HBV core antibodies(total) by two different techniques;[Monoliza antibodies to hepatitis B core(Anti-HBc) Plus-Bio-Rad] and(ARC-HBc total-ABBOT).Positive samples were subjected to quantitative detection of antibodies to hepatitis B surface(anti-HBs)(ETI-AB-AUK-3,Dia Sorin-Italy).Serum anti-HBs titers > 10 IU/L was considered positive.Quantitative HBV DNA by real time polymerase chain reaction(PCR)(QIAGEN-Germany) with 3.8 IU/mL detection limit was estimated for blood units with negative serum anti-HBs and also for 32 whose anti-HBs serum titers were > 1000 IU/L.Also,265 recipients were included,34 of whom were followed up for 3-6 mo.Recipients were investigated for ALT and AST,HBV serological markers:HBsAg(ETI-MAK-4,Dia Sorin-Italy),anti-HBc,quantitative detection of anti-HBs and HBV-DNA.RESULTS:525/3167(16.6%) of blood units were positive for total anti-HBc,64% of those were antiHBs positive.Confirmation by ARCHITECT anti-HBc assay were carried out for 498/525 anti-HBc positive samples,where 451(90.6%) confirmed positive.Reactivity for anti-HBc was considered confirmed only if two positive results were obtained for each sample,giving an overall prevalence of 451/3167(14.2%) for total anti-HBc.HBV DNA was quantified by real time PCR in 52/303(17.2%) of anti-HBc positive blood donors(viral load range:5 to 3.5 x 105 IU/mL) with a median of 200 IU/mL(mean:1.8 x 104 ± 5.1 x 104 IU/mL).AntiHBc was the only marker in 68.6% of donors.Univariate and multivariate logistic analysis for identifying risk factors associated with anti-HBc and HBV-DNA positivity among blood donors showed that age above thirty and marriage were the most significant risk factors for prediction of anti-HBc positivity with AOR 1.8(1.4-2.4) and 1.4(1.0-1.9) respectively.Other risk factors as gender,history of blood transfusion,diabetes mellitus,frequent injections,tattooing,previous surgery,hospitalization,Bilharziasis or positive family history of HBV or HCV infections were not found to be associated with positive anti-HBc antibodies.Among anti-HBc positive blood donors,age below thirty was the most significant risk factor for prediction of HBV-DNA positivity with AOR 3.8(1.8-7.9).According to HBV-DNA concentration,positive samples were divided in two groups;group one with HBV-DNA ≥ 200 IU/mL(n = 27) and group two with HBV-DNA < 200 IU/mL(n = 26).No significant difference was detected between both groups as regards mean age,gender,liver enzymes or HBV markers.Serological profiles of all followed up blood recipients showed that,all were negative for the studied HBV markers.Also,HBV DNA was not detected among studied recipients,none developed post-transfusion hepatitis(PTH) and the clinical outcome was good.CONCLUSION:OBI is prevalent among blood donors.Nucleic acid amplification/HBV anti core screening should be considered for high risk recipients to eliminate risk of unsafe blood donation.Zeinab N Said Manal H El Sayed Iman I Salama Enas K Aboel-Magd Magda H Mahmoud Maged El Setouhy Faten Mouftah Manal B Azzab Heidi Goubran Amal Bassili Gamal E Esmat 2013World Journal of Hepatology2013,5,2:4
9A Rigorous Architectural Approach to Adaptive Software Engineering显示文摘The engineering of distributed adaptive software is a complex task which requires a rigorous approach. Software architectural (structural) concepts and principles are highly beneficial in specifying, designing, analysing, constructing and evolving distributed software. A rigorous architectural approach dictates formalisms and techniques that are compositional, components that are context independent and systems that can be constructed and evolved incrementally. This paper overviews some of the underlying reasons for adopting an architectural approach, including a brief 'rational history' of our research work, and indicates how an architectural model can potentially facilitate the provision of self-managed adaptive software system.Jeff Kramere Jeff Magee 2009Journal of Computer Science & Technology2009,24,2:3
10Randomized trial comparing fanning with standard technique for endoscopic ultrasound-guided fine-needle aspiration of solid pancreatic mass lesions显示文摘J. Bang S. Magee J. Ramesh J. Trevino S. Varadarajulu 2013Endoscopy2013,,:3
11联合应用硫酸镁及硝苯地平治疗先兆子痫不会增加孕妇严重的镁相关副作用发生风险Magee L.A. Miremadi S. 朱晓明 2005世界核心医学期刊文摘(妇产科学分册)2005,0,11:3
12Scintigraphy in laryngopharyngeal and gastroesophageal reflux disease:A definitive diagnostic test?显示文摘AIM: To investigate the utility of scintigraphic studies in predicting response to laparoscopic fundoplication(LF) for chronic laryngopharyngeal reflux symptoms.METHODS: Patients with upper aero-digestive symptoms that remained undiagnosed after a period of 2 mo were studied with conventional p H and manometric studies. Patients mainly complained of cough, sore throat, dysphonia and globus. These patients were imaged after ingestion of 99m-technetium diethylene triamine pentaacetic acid. Studies were quantified with time activity curves over the pharynx, upper and lower oesophagus and background. Late studies of the lungs were obtained for aspiration. Patients underwent LF with post-operative review at 3 mo after surgery.RESULTS: Thirty four patients(20 F, 14 M) with an average age of 57 years and average duration of symptoms of 4.8 years were studied. Twenty four hour p H and manometry studies were abnormal in all patients. On scintigraphy, 27/34 patients demonstrated pharyngeal contamination and a rising or flat pharyngeal curve. Lung aspiration was evident in 50% of patients. There was evidence of pulmonary aspiration in 17 of 34 patients in the delayed study(50%). Pharyngeal contamination was found in 27 patients. All patients with aspiration showed pharyngeal contamination. In the 17 patients with aspiration, graphical time activity curve showed rising activity in the pharynx in 9 patients and a flat curve in 8 patients. In those 17 patients without pulmonary aspiration, 29%(5 patients) had either a rising or flat pharyngeal graph. A rising or flat curve predicted aspiration with a positive predictive value of 77% and a negative predictive valueof 100%. Over 90% of patients reported a satisfactory symptomatic response to LF with an acceptable sideeffect profile. CONCLUSION: Scintigraphic reflux studies offer a good screening tool for pharyngeal contamination and aspiration in patients with gastroesophageal reflux disease.Gregory L Falk John Beattie Alvin Ing SE Falk Michael Magee Leticia Burton Hans Van der Wall 2015World Journal of Gastroenterology2015,21,12:2
13采用LIMPET测试混凝土强度的试验研究显示文摘在钢筋混凝土结构服役寿命中,混凝土强度是联系结构安全性的重要指标。较为准确地检测混凝土质量,对于结构物而言是十分重要的。进行了英国女王大学研发的LIMPET混凝土强度监测设备对于中国混凝土的适用性验证。采用LIMPET拔出试验仪和液压式万能试验机对几种国内常用混凝土强度的试件进行测试,对数据进行统计分析之后,总结出国内常用混凝土的LIMPET拔出强度与轴心抗压强度之间的相关关系曲线,对现场评估结构物中混凝土强度提供相关依据,也为LIMPET仪器在中国的标准化提供试验支持。丁杭杰 陈璨 赵羽习 金伟良 P.A.M.Basheer Bryan J Magee 2013混凝土2013,,3:2
14Utility of endoscopic ultrasound in pancreatitis:A review显示文摘The close proximity of the endoscopic ultrasound probe to the pancreas results in superior spatial resolution compared to CT scan and MRI. In addition, endoscopic ultrasound (EUS) is a minimally invasive procedure that does not share the relatively high complication rate of ERCP. Due to these advantages, EUS has evolved into an important technique to assess pancreatobiliary disease. This review will discuss the role of EUS in patients with pancreatitis. The indications can be divided into acute pancreatitis and chronic pancreatitis. In acute pancreatitis, EUS is used to determine the etiology; in suspected chronic pancreatitis it is helpful to establish the diagnosis. Lastly, this review will discuss biliary pancreatitis with suspicion for persistent choledocholithiasis.Maged K Rizk Henning Gerke 2007World Journal of Gastroenterology2007,13,47:2
15CD5 expression promotes IL-10 production through activation of the MAPK/Erk pathway and upregulation of TRPC1 channels in B lymphocytes显示文摘CD5 is constitutively expressed on T cells and a subset of mature normal and leukemic B cells in patients with chronic lymphocytic leukemia(CLL).Important functional properties are associated with CD5 expression in B cells,including signal transducer and activator of transcription 3 activation,IL-10 production and the promotion of B-lymphocyte survival and transformation.However,the pathway(s)by which CD5 influences the biology of B cells and its dependence on B-cell receptor(BCR)co-signaling remain unknown.In this study,we show that CD5 expression activates a number of important signaling pathways,including Erk1/2,leading to IL-10 production through a novel pathway independent of BCR engagement.This pathway is dependent on extracellular calcium(Ca2+)entry facilitated by upregulation of the transient receptor potential channel 1(TRPC1)protein.We also show that Erk1/2 activation in a subgroup of CLL patients is associated with TRPC1 overexpression.In this subgroup of CLL patients,small inhibitory RNA(siRNA)for CD5 reduces TRPC1 expression.Furthermore,siRNAs for CD5 or for TRPC1 inhibit IL-10 production.These findings provide new insights into the role of CD5 in B-cell biology in health and disease and could pave the way for new treatment strategies for patients with B-CLL.Soizic Garaud Taher E Taher Marjolaine Debant Miguel Burgos Sarra Melayah Christian Berthou Kaushal Parikh Jacques-Olivier Pers Damien Luque-Paz Gilles Chiocchia Maikel Peppelenbosch David A Isenberg Pierre Youinou Olivier Mignen Yves Renaudineau Rizgar A Mageed 2018Cellular & Molecular Immunology2018,15,2:2
16珍珠层粉复合富血小板纤维蛋白对颅骨缺损模型兔的修复作用显示文摘目的:制备珍珠层粉(NP)和富血小板纤维蛋白(PRF)的复合材料,分析其修复颅骨缺损模型兔效果,阐明其可能的作用机制。方法:选择12只新西兰兔建立兔颅骨缺损模型,颅骨顶部矢状缝周围3 cm×3 cm区域脱毛处理,全身麻醉后,于矢状缝两侧,造成4个直径8 mm的全层颅骨缺损孔,并保留完整的硬脑膜。每只新西兰兔4个颅骨缺损孔按照植入物不同分为4组,分别为空白对照组、NP组、PRF组和复合组,于4、8和12周各处死4只新西兰兔,取颅骨缺损标本,HE染色观察各组新西兰兔颅骨缺损部位骨组织病理形态表现,MicroCT扫描检测各组新西兰兔骨矿物质密度(BMD)和新生骨体积/骨总体积百分数(BV/TV),免疫组织化学法检测各组新西兰兔颅骨缺损部位新骨组织中骨形态发生蛋白2(BMP-2)和血管内皮生长因子(VEGF)蛋白表达水平。结果:4、8和12周观察,与空白对照组、NP组和PRF组比较,复合组新西兰兔大体标本成骨明显丰满。Micro CT扫描,与空白对照组、NP组和PRF组比较,4、8和12周时复合组新西兰兔颅骨缺损部位新骨形成面积更大,BMD和BV/TV明显升高(P<0.05),以第12周最为明显(P<0.05)。HE染色,4周时复合组新西兰兔颅骨缺损部位骨细胞、类骨质和新生血管较空白对照组、NP组和PRF组增多,8周时复合组新西兰兔颅骨缺损部位骨矿化现象及新生骨小梁较空白对照组、NP组和PRF组更加明显,12周时复合组新西兰兔颅骨缺损部位新生骨小梁增粗且成熟程度较空白对照组、NP组和PRF组高。免疫组织化学检测,4、8和12周时复合组新西兰兔颅骨缺损部位新骨组织中BMP-2和VEGF蛋白表达水平较空白对照组、NP组和RFP组均明显升高(P<0.05)。结论:NP复合PRF制备的复合材料有明显的促进骨组织生长能力,并且可能通过诱导BMP-2和VEGF的增加,促进骨组织的再生。黄莹 马福娟 MAGED ALI Al-Aroomi 王触灵 谢富强 2021吉林大学学报(医学版)2021,47,5:2
17开放或血管腔内修复腹主动脉瘤21178例的荟萃分析显示文摘目的已有几个研究比较择期开放和血管腔内方法治疗腹主动脉瘤的预后,而结果并不一致。方法进行随机效应meta分析对手术结果、术后并发症、30天死亡率和术后患者长期存活率进行比较。以优势比(ORs)、加权平均差异(WMDs)或者log风险比(HRs)等合适的方法来比较事件终点。结果42个研究共21178例患者(开放10855例;血管腔内10323例)被纳入。在择期手术组(20715例),血管腔内方法的重症监护时间较短(WMD-36h;P<0.001),术后总住院时间亦较短(WMD-5.4d;P<0.001)。心脏并发症(OR1.76;P=0.002)和呼吸系统并发症(OR4.01;P<0.001)在开放手术后更常见。在血管腔内组,30天死亡率较低(OR0.46;P<0.001)。血管腔内手术的远期动脉瘤相关死亡率也较低(HR0.39;P<0.001)。对于破裂性腹主动脉瘤(463例),这种微创手术的重症监护时间较短(WMD-100.4h;P=0.005),30天死亡率也明显为低(OR0.45;P=0.005)。结论血管腔内修复腹主动脉瘤在降低术后不良事件和30天死亡率等方面成效显著。对于更远期,其动脉瘤相关死亡率也明显降低,但总体死亡率没有降低。李梓伦 刘仁斌 Lovegrove RE Javid M Magee TR 2008中华普通外科学文献(电子版)2008,2,5:2
18Future technology-enabled care for diabetes and hyperglycemia in the hospital setting显示文摘Patients with diabetes are increasingly common in hospital settings where optimal glycemic control remains challenging.Inpatient technology-enabled support systems are being designed,adapted and evaluated to meet this challenge.Insulin pump use,increasingly common in outpatients,has been shown to be safe among select inpatients.Dedicated pump protocols and provider training are needed to optimize pump use in the hospital.Continuous glucose monitoring(CGM)has been shown to be comparable to usual care for blood glucose surveillance in intensive care unit(ICU)settings but data on cost effectiveness is lacking.CGM use in non-ICU settings remains investigational and patient use of home CGM in inpatient settings is not recommended due to safety concerns.Compared to unstructured insulin prescription,a continuum of effective electronic medical record-based support for insulin prescription exists from passive order sets to clinical decision support to fully automated electronic Glycemic Management Systems.Relative efficacy and cost among these systems remains unanswered.An array of novel platforms are being evaluated to engage patients in technology-enabled diabetes education in the hospital.These hold tremendous promise in affording universal access to hospitalized patients with diabetes to effective self-management education and its attendant short/long term clinical benefits.Alex Renato Montero Jeffrey S Dubin Paul Sack Michelle F Magee 2019World Journal of Diabetes2019,10,9:2
19Cancer Stem Cells: Impact, Heterogeneity, and Uncertainty显示文摘Jeffrey A. Magee Elena Piskounova Sean J. Morrison 2012Cancer Cell2012,,3:2
20Resveratrol concentration in Muscadine berries, juice, pomace, purees,seeds, and wines 显示文摘Ector BJ Magee JB Hegwood CP 1996Am J Enol Vitic1996,47,:2
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