Network


Latest external collaboration on country level. Dive into details by clicking on the dots.

Hotspot


Dive into the research topics where Jose Rafael Garcia-Sanchez is active.

Publication


Featured researches published by Jose Rafael Garcia-Sanchez.


Metabolism-clinical and Experimental | 2010

Chemical and functional changes of human insulin by in vitro incubation with blood from diabetic patients in oxidative stress

Montes-Cortes Dh; Hicks Jj; Guillermo Ceballos-Reyes; Jose Rafael Garcia-Sanchez; Rafael Medina-Navarro; Ivonne María Olivares-Corichi

Oxidative stress damage to biomolecules has been implicated in several diseases including diabetes mellitus. In the present study, we investigated the effect of oxidative stress in whole blood (WB) from diabetic patients (n = 60) on recombinant human insulin. Insulin was incubated with WB obtained from diabetic patients (DP) who had hyperglycemia (>300 mg/dL) or from 41 healthy volunteers (HV). Whole blood of DP, unlike WB of HV, induced higher values of formazan (142%), dityrosines (279%), and carbonyls (58%) in the insulin residues. Interestingly, the insulin modified by WB of DP showed less hypoglycemic activity in rat (30%) in comparison with insulin incubated with WB of HV. The incubation of insulin in WB from DP induces chemical changes in insulin and a decrease in its biological activity, events that might be associated with the high levels of oxidative stress markers found in the plasma of these patients.


Complexity | 2017

Tracking Control for Mobile Robots Considering the Dynamics of All Their Subsystems: Experimental Implementation

Jose Rafael Garcia-Sanchez; Ramón Silva-Ortigoza; Salvador Tavera-Mosqueda; Celso Márquez-Sánchez; Victor Manuel Hernández-Guzmán; Mayra Antonio-Cruz; Gilberto Silva-Ortigoza; Hind Taud

The trajectory tracking task in a wheeled mobile robot (WMR) is solved by proposing a three-level hierarchical controller that considers the mathematical model of the mechanical structure (differential drive WMR), actuators (DC motors), and power stage (DC/DC Buck power converters). The highest hierarchical level is a kinematic control for the mechanical structure; the medium level includes two controllers based on differential flatness for the actuators; and the lowest hierarchical level consists of two average controllers also based on differential flatness for the power stage. In order to experimentally validate the feasibility of the proposed control scheme, the hierarchical controller is implemented via a – -modulator in a differential drive WMR prototype that we have built. Such an implementation is achieved by using MATLAB-Simulink and the real-time interface ControlDesk together with a DS1104 board. The experimental results show the effectiveness and robustness of the proposed control scheme.


international conference on mechatronics | 2016

A DC Motor Driven by a DC/DC Boost Converter-Inverter: Modeling and Simulation

Victor Hugo Garcia-Rodriguez; Ramón Silva-Ortigoza; Eduardo Hernandez-Marquez; Jose Rafael Garcia-Sanchez; Mario Ponce-Silva; Griselda Saldana-Gonzalez

In this paper the new topology DC/DC Boost power converter-inverter-DC motor that allows bidirectional rotation of the motor shaft is presented. In this direction, the system mathematical model is developed considering its different operation modes. Afterwards, the model validation is performed via numerical simulations by using Matlab-Simulink.


Energies | 2018

DC/DC Boost Converter–Inverter as Driver for a DC Motor: Modeling and Experimental Verification

Victor Hugo Garcia-Rodriguez; Ramón Silva-Ortigoza; Eduardo Hernandez-Marquez; Jose Rafael Garcia-Sanchez; Hind Taud

Víctor Hugo García-Rodríguez 1,2 , Ramón Silva-Ortigoza 1,∗ , Eduardo Hernández-Márquez 1,3 , José Rafael García-Sánchez 1 and Hind Taud 1 1 Área de Mecatrónica, Centro de Innovación y Desarrollo Tecnológico en Cómputo, Instituto Politécnico Nacional, Ciudad de México 07700, México; [email protected] (V.H.G.-R.); [email protected] (E.H.-M.); [email protected] (J.R.G.-S.); [email protected] (H.T.) 2 Departamento de Ingeniería en Diseño, Universidad del Istmo, Oaxaca 70760, México 3 Departamento de Mecatrónica, Instituto Tecnológico Superior de Poza Rica, Veracruz 93230, México * Correspondence: [email protected]; Tel.: +52-55-5729-6000 (ext. 52530)


Complexity | 2018

Bidirectional Tracking Robust Controls for a DC/DC Buck Converter-DC Motor System

Eduardo Hernandez-Marquez; Jose Rafael Garcia-Sanchez; Ramón Silva-Ortigoza; Mayra Antonio-Cruz; Victor Manuel Hernández-Guzmán; Hind Taud; Mariana Marcelino-Aranda

Two differential flatness-based bidirectional tracking robust controls for a DC/DC Buck converter-DC motor system are designed. To achieve such a bidirectional tracking, an inverter is used in the system. First control considers the complete dynamics of the system, that is, it considers the DC/DC Buck converter-inverter-DC motor connection as a whole. Whereas the second separates the dynamics of the Buck converter from the one of the inverter-DC motor, so that a hierarchical controller is generated. The experimental implementation of both controls is performed via MATLAB-Simulink and a DS1104 board in a built prototype of the DC/DC Buck converter-inverter-DC motor connection. Controls show a good performance even when system parameters are subjected to abrupt uncertainties. Thus, robustness of such controls is verified.


Pregnancy Hypertension: An International Journal of Women's Cardiovascular Health | 2017

Preeclampsia is associated with ACE I/D polymorphism, obesity and oxidative damage in Mexican women

José Arnold González-Garrido; Jose Rafael Garcia-Sanchez; José M. Tovar-Rodríguez; Ivonne María Olivares-Corichi

OBJECTIVE This study sought to determine whether the angiotensin-converting enzyme insertion/deletion (ACE I/D) polymorphism, obesity and oxidative damage are risk factors for the development of preeclampsia in Mexican women. STUDY DESIGN A total of 66 women with preeclampsia (PE) and 37 women with normal pregnancies (NP) were included in the study. DNA was extracted from whole blood, and the ACE I/D polymorphism was evaluated by polymerase chain reaction. ACE activity and oxidative damage were assessed in plasma. The intergroup comparisons were analyzed by an analysis of variance (ANOVA) with post hoc tests. Hardy-Weinberg equilibrium (HWE) was tested by x2 analysis, odds ratios (OR) were calculated as a measure of the degree of relative risk of preeclampsia, and for correlations, we used Spearmans correlation coefficient. RESULTS The frequency of the DD genotype was higher in PE (34.84%) than NP (10.82%). The OR of the DD genotype and D allele were associated with a 4.4-fold (CI=95% 2.24-14) and 3-fold (CI=95% 1.69-5.62) increased risk of developing PE, respectively. Major ACE activity in the DD genotype and obesity were features of the PE group; oxidative damage to proteins and a reduction in the activity of the antioxidant system showed a correlation with BMI (p<0.01). CONCLUSION Our results suggest that ACE I/D polymorphism, high ACE activity, body mass index and oxidative damage may play key roles in the pathogenesis of PE in the Mexican population. Furthermore, these findings could be used as predictive factors of PE.


international conference on mechatronics | 2016

Ackerman Mobile Robot with Arm

Roberto Antonio Orozco-Velazquez; Ramón Silva-Ortigoza; Celso Márquez-Sánchez; Jose Rafael Garcia-Sanchez; Hind Taud; Cynthia Yolanda Sosa-Cervantes; Mayra Antonio-Cruz; Mariana Marcelino-Aranda; Fernando Carrizosa-Corral

This work presents the design of a wheeled mobile robot (WMR) using an Ackerman configuration. Its design uses the extruded aluminum profile widely used in industry, facilitating the assembly of new robotics projects. The design is carried out using CAD software and shows some of the various benefits of these tools. The environmental impact values for a bar of extruded aluminum profile throughout its lifecycle was calculated and, later, analyzed by using SolidWorks simulationXpress study to improve the sustainability of the WMR design. Additionally, images of both the 3D model and the real prototype are presented.


Wspolczesna Onkologia-Contemporary Oncology | 2015

The association of subtypes of breast cancer with tumour characteristics and reproductive factors in 1326 Mexican women

Gabriel Pérez-Rodríguez; Catalina Aranda-Moreno; Ivonne María Olivares-Corichi; Jose Rafael Garcia-Sanchez

Aim of the study In breast cancer, oestrogen receptor (ER), progesterone receptor (PgR), and HER2 (HER2/Neu) expression status are used to classify neoplasms into subtypes: Luminal A, Luminal B, HER2/Neu type, and Basallike. The aim of the present study was to establish the molecular subtypes of breast cancers and their association with tumour characteristics and reproductive factors in Mexican women. Material and methods A total of 1326 biopsies of breast tumour tissues were analysed for ER, PR, and HER2/Neu by immunohistochemistry (IHC). Information regarding age, tumour characteristics, and node involvement profiles were collected. Results IHC established that the most common subtype of breast cancer was Luminal A (64.93%), followed by Basal-Like (13.88%), Luminal B (12.52%), and HER2/Neu (8.67%). T2-size tumours (> 2 cm but < 5 cm) were present in 47.59% of all patients. Univariate analysis showed that lymph node positivity (p = 0.009), stage (p = 0.013), and placement of the tumour (p = 0.001) were factors associated with breast cancer subtype. Conclusions Our data show that IHC is useful for distinguishing different subtypes of breast cancer and that Luminal A is the most common breast cancer subtype in the Mexican population. All subtypes were associated with unfavourable clinicopathological features, suggesting that late diagnosis is an important contributor to high mortality rates in the Mexican population.


IEEE Access | 2018

A DC/DC Buck-Boost Converter–Inverter–DC Motor System: Sensorless Passivity-Based Control

Eduardo Hernandez-Marquez; Ramón Silva-Ortigoza; Jose Rafael Garcia-Sanchez; Mariana Marcelino-Aranda; Griselda Saldana-Gonzalez


Energies | 2018

Robust Tracking Controller for a DC/DC Buck-Boost Converter–Inverter–DC Motor System

Eduardo Hernandez-Marquez; Carlos Alejandro Avila-Rea; Jose Rafael Garcia-Sanchez; Ramón Silva-Ortigoza; Gilberto Silva-Ortigoza; Hind Taud; Mariana Marcelino-Aranda

Collaboration


Dive into the Jose Rafael Garcia-Sanchez's collaboration.

Top Co-Authors

Avatar

Ramón Silva-Ortigoza

Instituto Politécnico Nacional

View shared research outputs
Top Co-Authors

Avatar
Top Co-Authors

Avatar

Hind Taud

Instituto Politécnico Nacional

View shared research outputs
Top Co-Authors

Avatar

Mariana Marcelino-Aranda

Instituto Politécnico Nacional

View shared research outputs
Top Co-Authors

Avatar

Mayra Antonio-Cruz

Instituto Politécnico Nacional

View shared research outputs
Top Co-Authors

Avatar

Celso Márquez-Sánchez

Instituto Politécnico Nacional

View shared research outputs
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar

Gilberto Silva-Ortigoza

Benemérita Universidad Autónoma de Puebla

View shared research outputs
Top Co-Authors

Avatar

Guillermo Ceballos-Reyes

Instituto Politécnico Nacional

View shared research outputs
Researchain Logo
Decentralizing Knowledge