La Laguna y Monte del Castillo, Mexico
La Laguna y Monte del Castillo, Mexico

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Martinez-Garcia E.A.,Autonomous University Of Cd Juarez | Martinez-Villafane A.,Research Center En Materiales Avanzados Integridad seno Of Materiales Compuestos | Mohan R.E.,Singapore University of Technology and Design
Proceedings of the 2012 7th IEEE Conference on Industrial Electronics and Applications, ICIEA 2012 | Year: 2012

We present a novel robotised search procedure to find flaws in buried pipelines. The motion planning system is based on an electrochemical ground measuring technique called direct-current voltage gradient (DCVG), and we combine it with the use of a tele-robotics assistance system. Remote human-robot interaction (HRI) deploys a trade on/off of information to accomplish defects search (in semi-autonomous mode). Furthermore, in the autonomous, we formulated a novel non-linear potential field approach to give the robot capabilities to automatically perform the search. The whole system consists of a tele-system; a four-wheeled driven (4WD) mobile robot with instruments on-board; a DCVG-based motion planning model; and the human-robot interaction protocol. In this approach we provide a general mathematical solution, numerical simulations, and experimental teleoperation trades. © 2012 IEEE.


Martinez-Garcia E.A.,Autonomous University Of Cd Juarez | Gallegos E.,Autonomous University Of Cd Juarez
Proceedings of the 2012 7th IEEE Conference on Industrial Electronics and Applications, ICIEA 2012 | Year: 2012

This manuscript describes in detail the development of an avatar robot for human companion tasks. The mobile robot embodies a remote human to have communications with other human while walking in close proximity to the mobile robot. The robot takes the role of a physical interface to deploy mobility, sensors and telepresence with personification throughout some behaviours of the remote human. Behaviours are conveyed through commands from a mouse/joystick and a EEG-based BRI. We discuss the aim of this work, as well as the tele-system architecture. Both the mobile robot featuring avatar capabilities, and the BRI are discussed. The system concept is also described and we report implementations and experimental results. © 2012 IEEE.


PubMed | Autonomous University of Chihuahua, Institute Ciencia Animal ICA, Autonomous University Of Cd Juarez, Autonomous University of Sinaloa and Autonomous University of Tamaulipas
Type: Journal Article | Journal: Brazilian journal of microbiology : [publication of the Brazilian Society for Microbiology] | Year: 2016

Solid-state fermentation can be used to produce feeds for ruminants, which can provide an enriched population of yeasts to improve ruminal fermentation. Fermentation of apple bagasse was performed to obtain a yeast-rich product, with the objective of isolating, identifying, and characterizing yeast strains and testing their capability to enhance in vitro ruminal fermentation of fibrous feeds. Yeasts were isolated from apple bagasse fermented under in vitro conditions, using rumen liquor obtained from cannulated cows and alfalfa as a fibrous substrate. A total of 16 new yeast strains were isolated and identified by biochemical and molecular methods. The strains were designated Levazot, followed by the isolate number. Their fermentative capacity was assessed using an in vitro gas production method. Strain Levazot 15 (Candida norvegensis) showed the greatest increase in gas production (p<0.05) compared with the yeast-free control and positively affected in vitro ruminal fermentation parameters of alfalfa and oat straw. Based on these results, it was concluded that the Levazot 15 yeast strain could be potentially used as an additive for ruminants consuming high-fiber diets. However, further studies of effects of these additives on rumen digestion, metabolism, and productive performance of ruminants are required.


Azhmyakov V.,CINVESTAV | Azhmyakov V.,Max Planck Institute for Dynamics of Complex Technical Systems | Noriega Morales S.,Autonomous University Of Cd Juarez
Asian Journal of Control | Year: 2010

This paper is concerned with the proximal-based approach to linear and finite-difference approximations of constrained convex optimal control problems. We consider control systems governed by ordinary differential equations in the presence of additional terminal/state inequalities and propose a numerical method derived from the proximal point algorithm. The aim of the paper is to study the convergence properties of the obtained conceptual algorithm and to show that it can be used to compute approximate optimal controls. © 2009 John Wiley and Sons Asia Pte Ltd and Chinese Automatic Control Society.


Jiang H.,Nagaoka University of Technology | Tovar-Carrillo K.,Autonomous University Of Cd Juarez | Kobayashi T.,Nagaoka University of Technology
Ultrasonics Sonochemistry | Year: 2016

Ultrasound (US) drug release system using cellulose based hydrogel films was developed as triggered to mimosa. Here, the mimosa, a fascinating drug to cure injured skin, was employed as the loading drug in cellulose hydrogel films prepared with phase inversion method. The mimosa hydrogels were fabricated from dimethylacetamide (DMAc)/LiCl solution in the presence of mimosa, when the solution was exposed to ethanol vapor. The US triggered release of the mimosa from the hydrogel matrix was carried out under following conditions of US powers (0-30 W) and frequencies (23, 43 and 96 kHz) for different mimosa hydrogel matrix from 0.5 wt% to 2 wt% cellulose solution. To release the drug by US trigger from the matrix, the better medicine release was observed in the matrix prepared from the 0.5 wt% cellulose solution when the 43 kHz US was exposed to the aqueous solution with the hydrogel matrix. The release efficiency increased with the increase of the US power from 5 to 30 W at 43 kHz. Viscoelasticity of the hydrogel matrix showed that the hydrogel became somewhat rigid after the US exposure. FT-IR analysis of the mimosa hydrogel matrixes showed that during the US exposure, hydrogen bonds in the structure of mimosa-water and mimosa-cellulose were broken. This suggested that the enhancement of the mimosa release was caused by the US exposure. © 2016 Elsevier B.V. All rights reserved.


Tovar-Carrillo K.L.,Nagaoka University of Technology | Tovar-Carrillo K.L.,Autonomous University Of Cd Juarez | Nakasone K.,Nagaoka University of Technology | Sugita S.,University of Guanajuato | And 2 more authors.
Materials Science and Engineering C | Year: 2014

Waste bagasse of Agave tequilana-Weber fibers treated with sodium hydroxide was used to elaborate hydrogel films. The bagasse was offered in an alternative use for the preparation of hydrogel films by phase inversion method without crosslinking and further purification of cellulose. The effect on the properties of the obtained films was studied when the chemical treatment of the agave fibers was changed. It was found that the resultant hydrogels showed increment in tensile from 40 N/mm2 to 56 N/mm2 with the increase of sodium hypochlorite concentration from 1 to 10 vol.%, respectively. With regard to biocompatibility properties of the hydrogel films, platelet adhesion, clotting time and protein adsorption were investigated. Analysis of the morphology of adherent NIH3T3 fibroblast indicated that the projected cell area, aspect ratio and long axis gradually increased with the increment of sodium hypochlorite content in the agave treatment. It was presented that the chemical treatment affects cell adhesion and morphology and lignin content remains in the brown fibers. © 2014 Elsevier B.V.


Tovar-Carrillo K.L.,Nagaoka University of Technology | Tovar-Carrillo K.L.,Autonomous University Of Cd Juarez | Tagaya M.,Nagaoka University of Technology | Kobayashi T.,Nagaoka University of Technology
Industrial and Engineering Chemistry Research | Year: 2014

Biohydrogel interpenetrated films of wooden pulp cellulose and hydroxyethyl cellulose (HEC) were prepared, and their biomedical properties were investigated. Our purpose was to obtain new material combining the nontoxicity and biocompatibility in wooden pulp cellulose films by interpenetration of HEC. It was found that the increment of HEC content affects the mechanical properties of the hydrogel from 10 to 50 wt % content of HEC. In vitro biocompatibility tests showed that protein adsorption, clotting time, and platelet adhesion were affected with the increment of HEC. All of the obtained hydrogels showed better cytocompatibility than the reference on a tissue culture grade polystyrene dish. However, HEC content seemed to decrease fibroblast cell densities due to its effect on the film properties, showing different pulp aggregation. In conclusion, the cell densities on hydrogel were significantly changed depending upon the HEC interpenetration. © 2014 American Chemical Society.


Reyes-Lopez S.Y.,Autonomous University Of Cd Juarez | Richa A.M.,University of Guanajuato
Macromolecular Symposia | Year: 2013

The bulk ring-opening polymerization (ROP) of ε-caprolactone (CL), catalyzed by molybdenum trioxide (α-MoO3), was investigated under nitrogen atmosphere at 150°C. Effect of monomer/initiator ([CL] 0/[I]0, I = MoO3) and monomer/initiator/co- initiator ([CL]0/[I]0/[CoI]0, CoI = ROH and H2O) ratios on monomer conversion and molecular weight were determined. Bulk polymerization of CL was completed within 20 hours at 150°C for [CL]0/[I]0 = 100. Propagation was first order in CL concentration and initiator at this temperature, being the rate constant of propagation kp equal to 2.27 × 10-4 mol-1 l s-1. Polymerization reaction was accelerated by the addition of small amounts of water and n-octanol. In the presence of water (up to [CL] 0/[H2O]0 = 120), polymerization rate increases and was completed within 6 hours at 150°C; for higher amounts of water (150 to 180), lower conversions are observed. However, control of number-average molecular weight was only efficient for [CL]0/[H2O] 0 = 20 and 30. In the presence of n-octanol, degradation of polyester occurs at early stages of polymerization. Kinetic data for polymerization (obtained by 1H-NMR) were fitted to 14 different model reaction functions. It was found that a linear model represents better the conversion versus time plots for bulk polymerization, in agreement with the pseudo living nature of polymerization. © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Villanueva-Chacon N.G.,Autonomous University Of Cd Juarez | Martinez-Garcia E.A.,Autonomous University Of Cd Juarez
Proceedings of the 6th Andean Region International Conference, Andescon 2012 | Year: 2012

An integrated distributed computing system for industrial tele-robotic tasks is discussed. Three main aspects are in focus: the architecture of the (network distributed computing system) on-board the robots, the tele-robotics assistance scheme in sewer exploration applications, and the robotic platforms. In this manuscript we present a focus in parallel hardware as the key issue to improve robot's tasks capabilities. The design of the robotic architecture for real world applications is in great extent a main concern to achieve a high robot's performance. The effectiveness and reliability critically depends on the presented distributed architecture and multi-sensor organization. Real results on tele-robotics environmental data collection are presented, as well as the tele-assistance proposed scheme. © 2012 IEEE.


PubMed | Nagaoka University of Technology and Autonomous University Of Cd Juarez
Type: | Journal: Ultrasonics sonochemistry | Year: 2016

Ultrasound (US) drug release system using cellulose based hydrogel films was developed as triggered to mimosa. Here, the mimosa, a fascinating drug to cure injured skin, was employed as the loading drug in cellulose hydrogel films prepared with phase inversion method. The mimosa hydrogels were fabricated from dimethylacetamide (DMAc)/LiCl solution in the presence of mimosa, when the solution was exposed to ethanol vapor. The US triggered release of the mimosa from the hydrogel matrix was carried out under following conditions of US powers (0-30W) and frequencies (23, 43 and 96kHz) for different mimosa hydrogel matrix from 0.5wt% to 2wt% cellulose solution. To release the drug by US trigger from the matrix, the better medicine release was observed in the matrix prepared from the 0.5wt% cellulose solution when the 43kHz US was exposed to the aqueous solution with the hydrogel matrix. The release efficiency increased with the increase of the US power from 5 to 30W at 43kHz. Viscoelasticity of the hydrogel matrix showed that the hydrogel became somewhat rigid after the US exposure. FT-IR analysis of the mimosa hydrogel matrixes showed that during the US exposure, hydrogen bonds in the structure of mimosa-water and mimosa-cellulose were broken. This suggested that the enhancement of the mimosa release was caused by the US exposure.

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