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667篇 您的检索式:作者名="Righini"
    题名 作者 年代 出处 被引量
1Diagnostic techniques for photonic materials based on Raman and Brillouin spectroscopies显示文摘The elastic and vibrational properties of a material,bulk or planar waveguide,are studied by Brillouin and Raman spectroscopy to follow the process of nanocrystals growth in glass-ceramics. The nanoparticles cause the appearance,in the low fre-quency Raman spectrum,of characteristic peaks,whose position depends on the size of the crystals. At the same time,sharp crystal peaks,due to optical phonons,appear in the Raman spectra,allowing the determination of the nucleated phase,and a frequency shift of the Brillouin peaks is observed.M. Mattarelli S.Caponi A. Chiappini M. Montagna E. Moser F. Rossi C.Tosello C. Armellini A. Chiasera M. Ferrari Y. Jestin G. Nunzi Conti S. Pelli G.C. Righini 2007Optoelectronics Letters2007,3,3:11
2离子交换铒掺杂硅酸盐玻璃波导光放大特性显示文摘将集成光学放大器用于光纤通信系统中是人们越来越感兴趣的课题 ,由此导致人们寻找与此相适应的稀土掺杂玻璃材料。给出了一系列Er3 + /Yb3 + 共掺杂硅酸盐玻璃波导的制备和光谱特性的基本结果。平面和条型波导均由Ag+ Na+ 离子交换技术制备。光谱测量显示 ,所有样品在 153 2nm都观测到了荧光发射峰 ,其半高谱宽为 19nm。用波长为 514 .5nm和 980nm的激光抽运 ,测得多数样品中Er3 + 离子在亚稳态4I13 /2 能级上的荧光寿命均为 7ms左右。Er3 + /Yb3 + 共掺杂玻璃的上转换均低于单掺Er3 + 玻璃。用 2 50mW ,波长为 980nm的激光抽运 3 .5cm长的条形波导 ,在 153 6nm波段下得到的最大净增益是 5dB ,增益谱的半峰全宽是 14nm。郑杰 王鹏飞 徐迈 范希武 Righini GC 2003光学学报2003,23,12:9
3Cervical cellulitis and mediastinitis following esophageal perforation:A case report显示文摘Chicken bone is one of the most frequent foreign bodies (FB) associated with upper esophageal perforation. Upper digestive tract penetrating FB may lead to life threatening complications and requires prompt management. We present the case of a 52-year-old man who sustained an upper esophageal perforation associated with cervical cellulitis and mediastinitis. Following CT-scan evidence of FB penetrating the esophagus, the impacted FB was successfully extracted under rigid esophagoscopy. Direct suture was required to close the esophageal perforation. Cervical and mediastinal drainage were made immediately. Naso- gastric tube decompression, broad-spectrum intravenous antibiotics, and parenteral hyperalimentation were administered for 10 d postoperatively. An esophagogram at d 10 revealed no leak at the repair site, and oral alimentation was successfully reinstituted. Conclusion: Rigid endoscope management of FB esophageal penetration is a simple, safe and effective procedure. Primary esophageal repair with drainage of all affected compartments are necessary to avoid life-threatening complications.Christian A Righini Basilide Z Tea Emile Reyt Karim A Chahine 2008World Journal of Gastroenterology2008,14,9:3
4Reproducibility of splicer-based long-period fiber gratings for gain equalization显示文摘We fabricated long-period fiber gratings(LPFGs) using electric arc discharges. We observed that the fiber becomes slightly tapered due to longitudinal tension during the arc:this effect depends on the arc current and time length. We experimentally investigated how these characteristics can influence grating's performances,especially in view of employing the LPFG as gain equalizer for an erbium-doped optical amplifier. As expected,we found that the spectral response of the grating depends on the period Λ,the intensity of the perturbation,the grating length and the type of mode-coupling induced. Since this last parameter cannot be estimated directly from the transmission spectra,we propose a method to determine the mode-coupling occurring in the device and to assess the index modulation induced by the electric arcs. This method combines both experimental and simulated data,and can be used to characterize LPFGs made-up by any method.I. Cacciari M. Brenci R. Falciai G. Nunzi Conti S. Pelli G. C. Righini 2007Optoelectronics Letters2007,3,3:2
5热铸坯的高温热修磨工艺显示文摘高温热修磨(Casttgrind)工艺通过在线修磨高温热板坯,使得在板坯连铸操作与热轧操作之间真正建立起物理性联机成为可能。在线高温热修磨具有更高的修磨产能;一体化的生产物流特性使产品交货周期(LeadTime)更短;产品质量得到进一步改进。P. Righini K. Stromberg B. Bralander 杨秋霜 2008钢铁2008,43,1:2
6Effects of age on the performance of common diagnostic tests for pulmonary embolism显示文摘Marc Righini Catherine Goehring Henri Bounameaux Arnaud Perrier 2000The American Journal of Medicine2000,,5:2
7A pathobiologic link between risk factors profile and morphological markers of carotid instability显示文摘Alessandro Mauriello Giuseppe M. Sangiorgi Renu Virmani Santi Trimarchi David R. Holmes Frank D. Kolodgie David G. Piepgras Giulia Piperno Doriana Liotti Jagat Narula Paolo Righini Arnaldo Ippoliti Luigi G. Spagnoli 2009Atherosclerosis2009,,2:2
8Er^(3+)-activated silica inverse opals synthesized by the solgel method显示文摘We present the details of the sol-gel processing used to realize inverse silica opal,where the silica was activated with 0.3 mol% of Er3+ ions. The template(direct opal) was obtained assembling polystyrene spheres of the dimensions of 260 nm by means of a vertical deposition technique. The Er3+-activated silica inverse opal was obtained infiltrating,into the void of the template,the silica sol doped with Er3+ ions and subsequently removing the polystyrene spheres by means of calcinations. Scanning electron microscope showed that the inverse opals possess a fcc structure with a air hollows of about 210 nm and a photonic band gap,in the visible range,was observed from reflectance measurements. Spectroscopic properties of Er3+-activated silica inverse opal were investigated by luminescence spectroscopy,where,upon excitation at 514.5 nm,an emission of 4I13/2 → 4I15/2 of Er3+ ions transition with a 21 nm bandwidth was observed. Moreover the 4I13/2 level decay curve presents a single-exponential profile,with a measured lifetime of 18 ms,corresponding a high quantum efficiency of the system.A. Chiappini C.Armellini A. Chiasera Y. Jestin M. Ferrari M. Mattarelli M. Montagna E. Moser C. Tosello L. Zampedri G. Nunzi Conti S. Pelli R. M. Almeida G. C. Righini 2007Optoelectronics Letters2007,3,3:2
9Pulse Calorimetry at High Temperatures显示文摘 Bussolino G C McClure J L 2000Thermochimica Acta2000,347,:1
10Prediction of pulmonary embolism in the emergency department; the revised Geneva score显示文摘Le Cal G Righini M Roy PM 2006Ann Inern Med2006,144,3:1
11Early cerebral lesions in cytomegalovirus infection: prenatal MR imaging 显示文摘Doneda C Parazzini C Righini A 2010Radiology2010,255,2:1
12Magnetic resonance imaging assessment of brain maturation in preterm neonates with punctate white matter lesions显示文摘Ramenghi LA Fumagalli M Righini A 2007Neuroradiology2007,49,2:1
13Uterine contractility decreases at the time of blastocyst trasfers显示文摘Fanchin R Ayoubi JM Righini C 2001Hum Reprod2001,16,6:1
14Thermal Expansion by a Pulse Heating Method:Niobium in the Range 1 000-2 600 K显示文摘 Roberts R B Rosso A 1999High Temp-High Press1999,18,:1
15Planning and scheduling algorithms for the COSMO-SkyMed constellation显示文摘Bianchessi N Righini G 2008Aerospace Science and Technology2008,12,7:1
16Effects of vaginal progesterone administration on uterine contractility at the time of embryo transfer 显示文摘Fanchin R Righini C de Ziegler D 2001Fertil Steril2001,75,:1
17Tumor-specific methylation in saliva: a promising biomarker for early detection of head and neck cancer recurrence 显示文摘Righini C A de Fraipont F Timsit J F 2007Clin Cancer Res2007,13,4:1
18Is atrial fibrillation associated with pulmonary embolism? 显示文摘Gex G Gerstel E Righini M 2012J Thromb Haemost2012,10,3:1
19Effects of age on the performance of common diagnostic tests for pulmonary embolism显示文摘Righini M Goehring C Bounameaux H 0,,:1
20Successful medical treatment of multiple brain abscesses due to Nocardia farcinica in a paediatric renal transplant recipient显示文摘Sara Maria Viganò Alberto Edefonti Mariano Ferraresso Maria Luisa Ranzi Paolo Grossi Andrea Righini Roberto Rusconi Luigi Santambrogio Luciana Ghio 2005Pediatric Nephrology2005,,8:1
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