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Endoscopic mucosal ablation-an alternative treatment for colonic polyps:Three case reports

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World Journal of Gastroenterology 2020年第45期26卷 7258-7262页

作者： antonio mendoza Ladd Joaquin Espinoza Cesar Garcia Department of Internal Medicine Division of GastroenterologyTexas Tech University Health Sciences CenterPaul L Foster School of MedicineEl PasoTX 79905United States Escuela de Medicina Luis Razetti Universidad Central de VenezuelaCaracas 999188Venezuela Department of Endoscopy University Medical Center of El PasoEl PasoTX 79905United States

BACKGROUND Endoscopic resection of non-invasive lesions is now the standard of care for lesions in the GI ***,resection techniques require extensive training,are not available in all endoscopy centers and are prone to *** mucosal ablation(EMA)is a combination of resection and ablation techniques and it may offer an alternative in the management of such *** SUMMARY In this case series we report the successful treatment of three flat colonic polyps using the EMA *** lesions were treatment naïve and 1 was a recurrence after an endoscopic mucosal *** sizes ranged from 2 to 4 *** three polyps were ablated successfully with no immediate or delayed *** recurrence rate at 1 year of follow up was 0%.CONCLUSION Based on this initial experience,we conclude that EMA is a safe and effective technique for the treatment of non-invasive colonic polyps when endoscopic resection techniques are not available.

关键词： Endoscopy Mucosal ablation Colon polyp Argon plasma coagulation Alternative Safe Case report

Pacman Renormalization in Siegel Parameters of Bounded Type

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Advances in Pure Mathematics 2023年第10期13卷 674-693页

作者： Carlos antonio Marin-mendoza Rogelio Valdez-Delgado Centro de Investigación en Ciencias Instituto de Investigación en Ciencias Básicas y Aplicadas Universidad Autónoma del Estado de Morelos Cuernavaca Mexico

A novel method of renormalization called Pacman renormalization allows us to study (unicritical) Siegel functions through Pacman-type functions. It has been used to investigate the Siegel parameters with combinatorially periodic rotation number in the main cardioid of the Mandelbrot set. It is already known that it can be defined a Pacman renormalization operator such that for Siegel pacmen, with combinatorially periodic rotation numbers, the operator is compact, analytic and has a unique fixed point, at which it is hyperbolic with one-dimensional unstable manifold. In this paper we observe that this Pacman renormalization operator is compact and analytic at any Siegel Pacman or Siegel map with combinatorially bounded rotation number. This allows us to define a renormalization operator on the hybrid classes of the standard Siegel pacmen to which we built its horseshoe where the operator is topologically semiconjugated to the left shift on the space of bi-infinite sequences of natural numbers bounded by some constant.

关键词： Siegel Parameters Pacman Renormalization Bounded Type Continued Fraction

Design and Development of an Electronic Sensor to Detect and Measure Curvature of Spaces Using Curvature Energy

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Journal of Sensor Technology 2012年第3期2卷 116-126页

作者： Francisco Bulnes Isaías Martínez antonio mendoza Manuel Landa Department of Research in Mathematics and Engineering Technological Institute of High Studies of Chalco Chalco Mexico Headquarters of Electronic Engineering Technological Institute of High Studies of Chalco Chalco México

Using fine electromagnetic signals to measure observables of other fields like curvature and torsion of a space, and the corresponding value of their integrals of the action of perception of curvature through electronic signals that detect curvature on a curved surface, it is designed and constructed a sensor of curvature of accelerometer type that detects and curvature measures in 2 and 3-dimensional spaces using the programming of shape operators on spheres and the value of their integrals along the curves and geodesics in their principal directions.

关键词： Sensor of Curvature Curvature Detection Curvature Accelerometer Electronic Curvature Perception Sensor-Perception Curve Curvature Energy

Endoscopic pancreatic necrosectomy in the United States-Mexico border:A cross sectional study

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World Journal of Gastrointestinal Endoscopy 2020年第5期12卷 149-158页

作者： antonio mendoza Ladd Mohammad Bashashati Alberto Contreras Onyedika Umeanaeto Alejandro Robles Department of Internal Medicine Division of GastroenterologyTexas Tech University Health Sciences CenterPaul L Foster School of MedicineEl PasoTX 79905United States Department of Internal Medicine Texas Tech University Health Sciences CenterPaul L Foster School of MedicineEl PasoTX 79905United States

BACKGROUND A recent expert panel issued recommendations about the technical aspects of direct endoscopic necrosectomy(DEN) for pancreatic walled-off necrosis(WON).However, significant technical heterogeneity still exists among *** To report the outcomes of our DEN technique and how it differs from a recent expert consensus statement and previous *** Medical records of patients with WON who underwent DEN from September2016-May 2019 were queried for the following information: Age, gender,ethnicity, etiology of acute pancreatitis, WON location and size, DEN technical information, adverse events(AEs) and outcomes. Adverse events were graded according to the American Society of Gastrointestinal Endoscopy Lexicon grading system. Technical success was defined as adequate lumen apposing metal stent(LAMS) deployment plus removal of ≥ 90% of necrosum. Clinical success was defined as complete resolution of WON cavity by imaging and resolution of symptoms at ≤ 3 months(mo) after last DEN. Data analysis was performed using mean and standard deviation for continuous variables,frequency and proportion for categorical variables, and median and range for interval *** A total of 21 patients underwent DEN. Most of them were Hispanic and their mean age was 51 ± 17 years. The majority of the collections were located in the body of the pancreas and the mean size was 13 cm ± 5 cm. The most common indication was persistent vomiting. Antibiotics were administered only in cases of infected necrosis. All LAMS were placed without radiological guidance,dilated the same day of deployment and removed after a mean of 27 ± 11 *** cross-sectional imaging immediately after drainage was not *** mean interval between DEN sessions was 7 ± 4 d and the mean number of DEN/patient was 3 ± 2. Technical and clinical success rates were both 95%. AEs were seen in 5 patients and included: Sepsis(2), stent migration(1), stent maldeployment(1), perforation(1). The

关键词： Endoscopic necrosectomy Technical differences Walled-off necrosis Lumen-apposing metal stents International consensus Clinical outcomes

应用防治污染的钠过滤技术减少制革废水中硫酸盐浓度的研究

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西部皮革 2012年第8期 41-48页

作者： María-Vicenta Galiana-Aleixandre José-antonio mendoza-Roca Amparo Bes-Piá 冯国琳王笃政不详

硫酸和其它含硫化学品的大量使用,导致制革废水中含有高浓度的硫酸盐。本文研究的目的是降低制革废水中硫酸盐的浓度。首先我们对制革厂中硫酸盐的主要来源进行了研究并对制革废水中硫酸盐的总排放进行了评估。我们研究了两种减少硫酸... 详细信息

硫酸和其它含硫化学品的大量使用,导致制革废水中含有高浓度的硫酸盐。本文研究的目的是降低制革废水中硫酸盐的浓度。首先我们对制革厂中硫酸盐的主要来源进行了研究并对制革废水中硫酸盐的总排放进行了评估。我们研究了两种减少硫酸盐的方法:脱毛废水再循环后放于浸水转鼓中和制革废水纳滤(NF)分离后硫酸铬的再利用。我们在实验室中用体积5L的鼓对上述所提到的第一个方法进行了研究。我们对浸泡鼓中不同体积的废水进行了一系列的实验研究。通过力学性能测试对最终的皮革质量进行了评估。我们在实验室试验工厂中应用螺旋膜元件进行了纳滤实验研究。研究结果表明,使用50%的脱毛废水和50%的淡水相结合来获得可观质量的皮革是适当的。此外,在脱毛操作中添加的硫化物减少大约10%。与纳滤实验有关,97%的硫酸盐被膜过滤。制革鼓里分离的离子可以再回收。应用这两种方法(第一个是脱毛废水再循环,第二个是制革洗涤废水的纳滤技术)每吨原料皮可以减少14.82kgSO4-2。

关键词：制革厂硫酸盐减少废水再循环污染防治纳滤

Pacman Renormalization in Siegel Parameters of Bounded Type

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Design and Development of an Electronic Sensor to Detect and Measure Curvature of Spaces Using Curvature Energy

Advances in Pure Mathematics（理论数学进展） 2023年第10期

作者： Carlos antonio Marin-mendoza Rogelio Valdez-Delgado

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Role of artificial intelligence in multidisciplinary imaging diagnosis of gastrointestinal diseases

Journal of Sensor Technology 2012年第3期

作者： Francisco Bulnes Isaías Martínez antonio mendoza Manuel Landa

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World Journal of Gastroenterology 2021年第27期27卷 4395-4412页

作者： M Alvaro Berbís José Aneiros-Fernández F Javier mendoza Olivares Enrique Nava antonio Luna Department of R&D HT MédicaMadrid 28046MadridSpain Department of Pathology Hospital Universitario Clínico San CecilioGranada 18012Spain Department of Gastroenterology Fatima ClinicSevilla 41012Spain Department of Communications Engineering University of MálagaMalaga 29016Spain MRI Unit Department of RadiologyHT MédicaJaén 23007Spain

The use of artificial intelligence-based tools is regarded as a promising approach to increase clinical efficiency in diagnostic imaging,improve the interpretability of results,and support decision-making for the detection and prevention of ***,endoscopy and pathology images are suitable for deep-learning analysis,potentially changing the way care is delivered in *** aim of this review is to examine the key aspects of different neural network architectures used for the evaluation of gastrointestinal conditions,by discussing how different models behave in critical tasks,such as lesion detection or characterization(*** distinction between benign and malignant lesions of the esophagus,the stomach and the colon).To this end,we provide an overview on recent achievements and future prospects in deep learning methods applied to the analysis of radiology,endoscopy and histologic whole-slide images of the gastrointestinal tract.

关键词： Artificial intelligence Machine learning Radiology Endoscopy Pathology Gastroenterology

Assessment of k–ε models using tetrahedral grids to describe the turbulent flow field of a PBT impeller and validation through the PIV technique

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Chinese Journal of Chemical Engineering 2018年第5期26卷 942-956页

作者： Victor X. mendoza-Escamilla Alejandro Alonzo-Garcia Helvio R. Mollinedo Israel Gonzalez-Neria J. antonio Yanez-Varela Sergio A. Martinez-Delgadillo Depto. Electronica Universidad Autonoma Metropolitana Azcapotzalco Av. San Pablo 180 Azcapotzalco CP 07740 Mexico D.F. Mexico CONACyT-Centro de Ingenierfa y Desarrollo Industrial Av. Piaya Pie de la Cuesta 702 Desarrollo San Pablo 76125 Queretaro Qro. Mexico UPIITA Instituto Politecnico Nacional Av. IPN 2580 G.A. Madero CP 07340 Mexico D.F. Mexico Depto. Ciencias Basicas Universidad Autonoma Metropolitana Azcapotzalco Av. San Pablo 180 Azcapotzalco CP 07740 Mexico D.F Mexico

In turbulence modeling, the RNG and Realizable models have important improvements in the turbulent production and dissipation terms in comparison to the Standard. The selection of the appropriate turbulence model has an impact on the convergence and solution in STRs, and they are used in mixing, multiphase modeling or as starting solution of transient models as DES and LES. Although there are several studies with the pitched blade turbine(PBT) impeller, most of them used the Standard model as representative of all k–ε models, using structured hexahedral grids composed of low number of cells, and in some cases under axial symmetry ***, in this work the assessment of the Standard, RNG and Realizable models to describe the turbulent flow field of this impeller, using the Multiple Reference Frame(MRF) and Sliding Mesh(SM) approaches with tetrahedral domains in dense grids, is presented. This kind of cell elements is especially suitable to reproduce complex geometries. Flow velocities and turbulent parameters were verified experimentally by PIV and torque measurements. The three models were capable of predicting fairly the pumping number, the power number based on torque, and velocities. Although the RNG improved the predictions of the turbulent kinetic energy and dissipation rate, the Realizable model presented better performance for both approaches. All models failed in the prediction of the total dissipation rate, and a dependence of its value on the number of cells for the MRF was found.

关键词： Tetrahedral grids PIV Turbulent flow k-ε models Stirred vessel