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Rheological Behaviour, Synthesis and Perf.rmance of.Smart Thermal Barrier Coating Systems Based on Hollow Alumina

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Journal of.Materials Science and Chemical Engineering 2015年第12期3卷 17-22页

作者： f. pedraza B. Rannou G. Boissonnet B. Bouchaud Z. Maache-Rezzoug LaSIE Université de La Rochelle-CNRS-UMR 7356 P&ocirc le Sciences et Technologie La Rochelle France

The stability of.three water-based slurries containing dif.erent loads of.Al microparticles was measured by laser scattering. The slurries displayed a Newtonian behaviour and the evolution of.viscosity over nine days was f.und to be constant. Ground surf.ces of.nickel were also wetted similarly irrespective of.the Al content in the slurries (30, 40 or 50 wt%) thereby demonstrating that the 1/10 PVA/H2O water based slurries are adequate f.r spraying. Af.er deposition and annealing of.the as-sprayed coatings, a thermal barrier coating system was f.rmed with a top coat of.hollow alumina spheres, an intermediate thermally grown oxide and a bottom aluminized bond coat. The coating system is shown to display very low thermal conductivity and remarkable oxidation resistance at high temperatures.

关键词： Slurry Viscosity Wetting Thermal Barrier Coating Thermal Conductivity Oxidation

pH-distribution of.cerium species in aqueous systems

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Journal of.Rare Earths 2012年第6期30卷 559-562页

作者： B.Bouchaud J.Balmain *** f.pedraza University of.La Rochelle Laboratory of Engineering Science for the Environment LaSIE FRE-CNRS3474Avenue Michel Crépeau 17042 La Rochelle cedex 01FRANCE

Cerium-based oxide coatings can be obtained through either chemical or electrochemical processes on various conductor and semiconductor substrates. In both cases the f.lms develop through a precipitation mechanism, which strongly depends on the solution chemistry. In the particular case of.the electrolytic approach, the elaboration parameters play a key role on the interf.cial pH modif.cation thereby leading to an indirect precipitation mechanism. Indeed, the nucleation and growth mechanisms of.crystallites and the composition of.the resulting layers have been shown to be also strongly af.ected by the deposition conditions as well as by the substrate composition, which could in turn modif. the protectiveness provided by such coatings. Theref.re a better f.ndamental understanding of.the system is required, in particular of.the distribution of.cerium-containing species in aqueous solution. To this end, the present work intended to develop a diagram showing the distribution as well as the relative amount of.Ce（Ⅲ）/Ce（Ⅳ） species in aqueous media as a f.mction of.the pH range. The resulting pH-distribution diagram turned out to be a usef.l tool to predict the relevant precipitation mechanisms and species involved during the growth of.ceriuna-containing f.lms and to draw correlations with the characteristics of.the as-deposited f.lms.

关键词： pH-distribution diagram electrodeposition cerium-based oxide f.lms precipitation mechanisms rare earths

Impact of.payment source, ref.rral site, and place of.residence on outcomes af.er allogeneic transplantation in Mexico

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World Journal of.Transplantation 2024年第2期14卷 76-87页

作者： Andrés Gómez-De León Yesica A López-Mora Valeria García-Zárate Ana Varela-Constantino Sergio U Villegas-De Leon Xitlaly J González-Leal Raúl del Toro-Mijares Anna C Rodríguez-Zúñiga Juan f.Barrios-Ruiz Victor Mingura-Ledezma Perla R Colunga-pedraza Olga G Cantú-Rodríguez César H Gutiérrez-Aguirre Luz Tarín-Arzaga Elías E González-López David Gómez-Almaguer Hematology Service Universidad Autónoma de Nuevo LeónFacultad de Medicina y Hospital Universitario Dr.JoséEleuterio GonzálezMonterrey 64460Nuevo LeónMexico Hemato-logy Service Clínica Gómez AlmaguerMonterrey 64710Nuevo LeónMexico Hematology Service Instituto Tecnológico de Estudios Superiores de MonterreyTec SaludEscuela de Medicina Ignacio SantosMonterrey 64710Nuevo LeónMexico

BACKGROUND The impact of.social determinants of.health in allogeneic transplant recipients in low-and middle-income countries is poorly *** observational study analyzes the impact of.place of.residence,ref.rring institution,and transplant cost coverage(out-of.pocket vs government-f.nded vs private insurance)on outcomes af.er allogeneic hematopoietic stem cell transplantation(alloHSCT)in two of.Mexico's largest public and private *** To evaluate the impact of.social determinants of.health and their relationship with outcomes among allogeneic transplant recipients in *** In this retrospective cohort study,we included adolescents and adults≥16 years who received a matched sibling or haploidentical transplant f.om *** were selected without regard to their diagnosis and were sourced f.om both a private clinic and a public University Hospital in *** payment groups were compared:Out-of.pocket(OOP),private insurance,and a f.deral Universal healthcare program“Seguro Popular”.Outcomes were compared between ref.rred and institution-diagnosed patients,and between residents of.Nuevo Leon and *** outcomes included overall survival(OS),categorized by residence,ref.rral,and payment *** outcomes encompassed early mortality,event-f.ee-survival,graf.-versus-host-relapse-f.ee survival,and non-relapse-mortality(NRM).Statistical analyses employed appropriate tests,Kaplan-Meier method,and Cox proportional hazard regression *** sof.ware included SPSS and R with tidycmprsk *** Our primary outcome was overall *** included 287 patients,n=164 who lived out of.state(57.1%),and n=129 ref.rred f.om another institution(44.9%).The most f.equent payment source was OOP(n=139,48.4%),f.llowed by private insurance(n=75,26.1%)and universal coverage(n=73,25.4%).No dif.erences in OS,event-f.ee-survival,NRM,or graf.-versus-host-relapse-f.ee survival were observed f.r patients dia

关键词： Hematopoietic cell transplant Social determinants of.health Geography Haploidentical Out-of.pocket f.nancial toxicity Survival Health services and outcomes Hematopoietic malignancy Aplastic anemia

Modern data sources and techniques f.r analysis and f.recast of.road accidents:A review

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Journal of.Traf.ic and Transportation Engineering(English Edition) 2020年第4期7卷 432-446页

作者： Camilo Gutierrez-Osorio Cesar pedraza Departamento de Ingeniena de Sistemas e Industrial Universidad Nacional de ColombiaBogotaColombia

Road accidents are one of.the most relevant causes of.injuries and death worldwide,and theref.re,they constitute a signif.cant f.eld of.research on the use of.advanced algorithms and techniques to analyze and predict traf.ic accidents and determine the most relevant elements that contribute to road *** research of.road accident prediction aims to respond to the challenge of.of.er tools to generate a more secure mobility environment,and ultimately,save *** paper aims to provide an overview of.the state of.the art in the prediction of.road accidents through machine learning algorithms and advanced techniques f.r analyzing inf.rmation,such as convolutional neural networks and long short-term memory networks,among other deep learning ***,in this article,a compendium and study of.the most used data sources f.r the road accident f.recast is *** a classif.cation is proposed according to its origin and characteristics,such as open data,measurement technologies,onboard equipment and social media *** the analysis of.the inf.rmation,the dif.erent algorithms employed to make predictions about road accidents are listed and compared,as well as their applicability depending on the types of.data being analyzed,along with the results obtained and their ease of.interpretation and *** best results reported by the authors are obtained when two or more analytic techniques are combined,in such a way that analysis of.the obtained results is *** the f.ture challenges in road traf.ic f.recasting lies the enhancement of.the scope of.the proposed models and predictions by the incorporation of.heterogeneous data sources,that include geo spatial data,inf.rmation f.om traf.ic volume,traf.ic statistics,video,sound,text and sentiment f.om social media,that many authors concur that can improve the precision and accuracy of.the analysis and predictions.

关键词： Traf.ic engineering Data analysis Machine learning Road accident f.recasting Traf.ic accident prediction

How Does Cultural Dif.erence Af.ect Cross-Border Mergers and Acquisitions?

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How Does Cultural Difference Affect Cross-Border Mergers and...

作者： CHRISTIAN EMANUEL pedraza HERRERA 上海财经大学

学位级别：硕士

本文的目的是解释文化差异如何影响跨境并购。我们使用了2015年进行的147个不同的跨国并购交易的样本。对于此类交易,收购公司都位于美国,而目标公司来自18个不同的国家。异常的股市收益是用来衡量并购交易后并购公司财务状况的变量。... 详细信息

本文的目的是解释文化差异如何影响跨境并购。我们使用了2015年进行的147个不同的跨国并购交易的样本。对于此类交易,收购公司都位于美国,而目标公司来自18个不同的国家。异常的股市收益是用来衡量并购交易后并购公司财务状况的变量。为了衡量文化差异,我们使用了一个变量,该变量说明了Hof.tede文化距离的所有六个维度。本文证明,事实上,两家从事跨国并购交易的公司的文化差异与交易后的并购公司的财务绩效之间存在明显的正相关关系。关于文化差异对并购绩效的影响,目前尚无共识,许多文献认为,文化差异具有负面影响。对此明显矛盾的解释是,问题不在于文化距离本身,而在于企业解决整合的方式。此外,本文还为收购公司提供了一些建议,说明如何有效地推进整合以实现理想的协同效应。

关键词：跨境并购并购异常股票市场收益文化差异整合

Mid-term results of.patterned laser trabeculoplasty f.r uncontrolled ocular hypertension and primary open angle glaucoma

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International Journal of.Ophthalmology(English edition) 2021年第8期14卷 1199-1204页

作者： Gustavo Espinoza Yuly Andrea Castellanos-Castellanos Angelica pedraza-Concha Ignacio Rodriguez-Una Maria f.rnanda Acuna Juan Camilo Parra Centro Of.almologico Virgilio Galvis BucaramangaSantander 681004Colombia f.ndacion Of.almologica de Santander BucaramangaSantander 681004Colombia Universidad Industrial de Santander BucaramangaSantander 680002Colombia Instituto Of.almologico f.rnandez-Vega Universidad de OviedoOviedo 33012Spain

AIM:To describe the saf.ty and ef.icacy of.patterned laser trabeculoplasty(PLT)as an adjunctive treatment in primary open angle glaucoma(POAG)and ocular hypertension(OHT)af.er 18-month f.llow-up in Hispanic ***:A single-center,retrospective study was *** patients with OHT or POAG undergoing PLT f.om June 2016 to August 2016 were included in the *** parameters were intraocular pressure(IOP),the number of.IOP-lowering medications,best corrected visual acuity(BCVA),laser parameters and postoperative adverse *** ef.icacy outcome measures were the proportion of.eyes achieving an IOP reduction≥20%at 18 mo versus baseline medicated IOP or a reduction in the number of.medications while maintaining IOP ***:f.om 40 PLT-treated eyes(mean baseline IOP 20.3±1.7 mm Hg),24 patients were analyzed(age 63.4±7.3 y).The mean IOP reductions f.om baseline across visits(months 1,3,6,9,12,and 18)ranged f.om 14.1%to 20.8%.Success rate af.er 18-month f.llow-up was 61.7%with a mean IOP of.16±3.2 mm Hg(Pf.glaucoma IOP-lowering medications per eye(preoperative 2.1±1.1 and postoperative 2.3±1.1,P=0.86)and the mean BCVA(preoperative 0.10±0.22 and postoperative 0.11±0.22 logMAR,P=0.42)remained *** events comprised transitory IOP spikes in 4 eyes(10%)and peripheral anterior synechiae in 7 eyes(17.5%).CONCLUSION:Mid-term results of.PLT show that this procedure may be an ef.icacious and saf. technique to approach medically uncontrolled OHT or POAG patients.

关键词： glaucoma intraocular pressure ocular hypertension patterned laser trabeculoplasty

Microscopic colitis:A large retrospective analysis f.om a health maintenance organization experience

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World Journal of.Gastroenterology 2009年第25期15卷 3122-3127页

作者： Kevin T Kao Benito A pedraza Amy C McClune David A Rios Yi-Qiong Mao Robert H Zuch Michael H Kanter Sony Wirio Chris N Conteas Department of.Gastroenterology Kaiser PermanenteLos Angeles Medical Center Los Angeles California 90027United States Department of.Internal Medicine Kaiser Permanente Los Angeles Medical Center Los Angeles California 90027 United States Department of.Pathology Southern California Kaiser Permanente Medical Group California 90027 United States

AIM： To examine the demographic data on a large multi-ethnic population of.patients with microscopic colitis （MC） in Southern Calif.rnia and to determine the association of.MC with inf.ammatory bowel disease （IBD） and colorectal cancer. METHODS： All patients diagnosed with MC by co- Ionic biopsy f.om 1996-2005 were identif.ed utilizing a pathology database. All biopsies were reviewed by experienced pathologists utilizing standard histologic criteria. Patients＇ medical records were reviewed and data regarding patient age, co-morbidities, sex, ethnic- ity, and medications were analyzed. An age- and sex- matched standard control group was also generated. Chi-square test was used to evaluate the associations of.co-morbidities between lymphocytic colitis （LC）, col- lagenous colitis （CC） and the control group. RESULTS： A total of.547 cases of.MC were identif.ed, 376 patients with LC and 171 patients with CC. The f.- male/male ratio was 3：1 in CC and 2.7：1 in LC patients. Celiac disease （P 〈 0.001）, irritable bowel syndrome （IBS）（P 〈 0.001）, and thyroid diseases （P 〈 0.001） were f.und to have a higher occurrence in MC com- pared to the control group. No statistical dif.erences in the occurrence of.colorectal cancer, diabetes and IBD were f.und between the MC group and the control group. CONCLUSION： This is the largest group of.patients with MC known to the authors that has been studied to date. Conditions such as celiac disease, IBS, and thyroid diseases were f.und to be related to MC. f.r- thermore, neither an increased risk of.colorectal cancer nor IBD was associated with MC in this study.

关键词： Collagenous colitis Inf.ammatory bowel disease Lymphocytic colitis Microscopic colitis

Opportunities f.r treatment of.the hepatitis C virus-inf.cted patient with chronic kidney disease

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World Journal of.Hepatology 2017年第19期9卷 833-839页

作者： Marco Ladino f.rnando pedraza David Roth Miller School of.Medicine and the Miami Veterans Administration Medical Center Katz f.mily Division of.Nephrology and Hypertension University of Miami

The prevalence of.hepatitis C virus(HCV) inf.ction amongst patients with chronic kidney disease(CKD) and end-stage renal disease exceeds that of.the general population. In addition to predisposing to the development of.cirrhosis and hepatocellular carcinoma, inf.ction with HCV has been associated with extra-hepatic complications including CKD, proteinuria, glomerulonephritis, cryoglobulinemia, increased cardiovascular risk, insulin resistance, and lymphoma. With these associated morbidities, inf.ction with HCV is not unexpectedly accompanied by an increase in mortality in the general population as well as in patients with kidney disease. Advances in the understanding of.the HCV genome have resulted in the development of.direct-acting antiviral agents that can achieve much higher sustained virologic response rates than previous interf.ron-based protocols. The direct acting antivirals have either primarily hepatic or renal metabolism and excretion pathways. This inf.rmation is particularly relevant when considering treatment in patients with reduced kidney f.nction. In this context, some of.these agents are not recommended f.r use in patients with a glomerular f.ltration rate f.od and Drug Administration approved direct acting antiviral agents f.r the treatment of.patients with kidney disease and reduced f.nction. These agents have been demonstrated to be ef.ective with sustained viral response rates comparable to the general population with good saf.ty prof.les. A disease that was only recently considered to be very challenging to treat in patients with kidney dysf.nction is now curable with these medications.

关键词： Hepatitis C virus Chronic kidney disease Direct acting antiviral agents Kidney transplantation

Short-term outcomes af.er the loading phase of.intravitreal bevacizumab and subthreshold macular laser in non-center involved diabetic macular edema

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International Journal of.Ophthalmology(English edition) 2018年第6期11卷 981-985页

作者： Edgar Cuervo-Lozano Jesus Hernan Gonzalez-Cortes Abraham Olvera-Barrios Ezequiel Trevino-Cavazos Josue Rodriguez-pedraza Karim Mohamed-Noriega Jesus Mohamed-Hamsho Ophthalmology Department University Hospital "Jose Eleuterio Gonzalez" and Faculty of Medicine the Autonomous University of Nuevo Leen Monterrey 64460 Mexico

AIM： To compare the ef.ectiveness of.intravitreal bevacizumab and subthreshold macular photocoagulation （SMP）, f.r the treatment of.non-center involved diabetic macular edema （non-CI DME）. METHODS： Prospective, randomized, controlled clinical study included patients with type 2 diabetes, non-CI DME and best-corrected visual acuity （BCVA） of.0.30 logMAR or better. Each eye was randomized into three groups： group 1, monthly intravitreal bevacizumab; group 2, single SMP; group 3, single SMP and monthly bevacizumab. Main outcome measures were BCVA, and macular thickness measured with optical coherence tomography as macular central subf.eld thickness （CST）, macular area of.greater thickness （MAGT） and total macular volume （TMV）. Results were analyzed af.er 3mo. RESULTS： A total of.32 eyes were included. Group 3 improved in BCVA （0.19±0.16 to 0.12±0.14 logMAR; P=0.041） and in TMV （7.90±0.57 to 7.65±0.73 mm3; P=0.025）. Group 1 improved in MAGT （325±26.26 to 298.20±44.85 μm; P=0.022） and TMV （7.79±0.57 to 7.50±0.56 mm3, P=0.047）. Group 2 didn’t show signif.cant improvement of.any variable. CONCLUSION： The loading phase of.bevacizumab as monotherapy or combined with SMP is superior to SMP as monotherapy in providing short-term visual and anatomical improvement in non-CI DME.

关键词： non-center involved diabetic macular edema intravitreal bevacizumab subthreshold macular photocoagulation intravitreal antiangiogenic