The Autonomous University of Baja California, is a public university in the Mexican state of Baja California. UABC is one of the 43 state universities throughout Mexico as part of the country's state university system. The Autonomous University of Baja California headquarters are located in the city of Mexicali at Av. Álvaro Obregón y Julián Carrillo s/n, Edificio de Rectoría, Col. Nueva, C.P. 021100.The UABC has three main campuses in the cities of Ensenada, Mexicali, and Tijuana. UABC maintains five sub campuses in the cities of Rosarito, San Quintin, Tecate, Valle Dorado in Ensenada, and the suburban region of Valle de Las Palmas in Tijuana. The institution also operates three Units of Basic Formation in the cities of San Felipe, Ciudad Morelos, and Guadalupe Victoria.Under the Subsecretary of Higher Education, UABC belongs to the General Management of Higher Learning Institutions , a part of the nation's eight-tier public higher education system, which also includes the General Coordination of Technological Universities , the General Management of Technological Higher Learning , the General Management of Higher Learning for Educators , the General Management of Professions , the Copyrights National Institute , the National Pedagogical University , and the Coordination of Polytechnic Universities .UABC follows Mexico's higher education format: tronco común , técnico superior , licenciatura , maestria , and doctorado . Wikipedia.
Aristizabal P.,Autonomous University of Baja California
Journal of Pediatric Hematology/Oncology | Year: 2017
Treatment for medulloblastoma carries significant risks, particularly in resource-constrained settings. We report a case of a Mexican infant with desmoplastic/nodular medulloblastoma. Given the nature of her tumor, we developed a tailored regimen following subtotal resection to avoid both radiation therapy and the high-dose cisplatin therapy offered at most centers in the United States. The patient is in remission 4 years after the initial diagnosis. This case suggests an alternative treatment plan for this particular tumor variant that accommodates the limited resources of many centers around the world and avoids the risks associated with radiation therapy at a young age. Copyright © 2017 Wolters Kluwer Health, Inc. All rights reserved.
Galaviz M.A.,Autonomous University of Baja California
Comparative biochemistry and physiology. Part B, Biochemistry & molecular biology | Year: 2012
The present study aimed to describe and understand the development of the digestive system in spotted rose snapper (Lutjanus guttatus) larvae from hatching to 40 days post-hatch (dph). The mouth opened between 2 and 3 dph, at that moment the digestive tract was barely differentiated into the anterior and posterior intestine, although the liver and pancreas were already present. Gastric glands were observed until 20 dph, followed by the differentiation of the stomach between 20 and 25 dph. Trypsinogen expression and trypsin activity were detected at hatching, increasing concomitantly to larval development and the change in the type of food. Maximum levels of trypsinogen expression were observed at 25 dph, when animals were fed with Artemia nauplii, and maximum trypsin activity was detected at 35 dph, when larvae were fed with an artificial diet. On the other hand, pepsinogen gene expression was detected at 18 dph, two days before pepsin enzymatic activity and appearance of gastric glands. Maximum pepsin activity was also observed at 35 dph. These results suggest that in this species weaning could be initiated at an earlier age than is currently practiced (between 28 and 30 dph), since larvae of spotted rose snapper develop a functional stomach between days 20 and 25 post-hatch. Copyright © 2011 Elsevier Inc. All rights reserved.
Laniado-Laborin R.,Autonomous University of Baja California
Postgraduate Medicine | Year: 2010
Cigarette smoking represents the most important source of preventable morbidity and premature mortality worldwide. Approximately 100 million deaths were caused by tobacco use in the 20th century. There are > 1 billion smokers worldwide, and globally the use of tobacco products is increasing, with the epidemic shifting to the developing world. Tobacco dependence is a chronic condition that often requires repeated intervention for success. Just informing a patient about health risks, although necessary, is usually not suffi cient for a decision to change. Smokers should be provided with counseling when attempting to quit. Pharmacologic smoking cessation aids are recommended for all smokers who are trying to quit, unless contraindicated. Evidence-based guidelines recommend nicotine replacement therapy, bupropion SR, and varenicline as effective alternatives for smoking cessation therapy, especially when combined with behavioral interventions. Combination pharmacotherapy is indicated for highly nicotinedependent smokers, patients who have failed with monotherapy, and patients with breakthrough cravings. An additional form of nicotine replacement therapy or an addition of a non-nicotine replacement therapy oral medication (bupropion or varenicline) may be helpful. The rate of successful smoking cessation at 1 year is 3% to 5% when the patient simply tries to stop, 7% to 16% if the smoker undergoes behavioral intervention, and up to 24% when receiving pharmacological treatment and behavioral support. © Postgraduate Medicine.
Gomez-Miranda L.M.,Autonomous University of Baja California
Nutrición hospitalaria | Year: 2013
Meza-Kubo V.,Autonomous University of Baja California |
Moran A.L.,Autonomous University of Baja California
Personal and Ubiquitous Computing | Year: 2013
This paper presents a design framework that facilitates the development of usable cognitive stimulation applications for elders. A usable application considers various aspects for its design to suit its users, such as usefulness, ease of use and satisfactory user experience, in order to engage them in its use. The framework brings together the lessons learned over a period of 3 years performing fieldwork and evaluating prototypes with elders. As proof of concept, and to gather feedback for the framework, we designed, developed and evaluated Abueparty, a cognitive wellness system that uses a game board metaphor to propose everyday entertainment activities for the cognitive stimulation of worried-well elders. The evaluation results provide evidence that participants perceived Abueparty as useful, easy to use and providing a pleasant user experience. These results provide evidence of the framework's usefulness for the effective design of usable cognitive stimulation applications. © 2012 Springer-Verlag London Limited.
Durazo R.,Autonomous University of Baja California
Journal of Geophysical Research C: Oceans | Year: 2015
Hydrographic data collected over the period 1997-2013 are analyzed to investigate the seasonality of hydrographic features and associated geostrophic flows off the Baja California peninsula. The upper ocean in the region was found to be homogeneous in winter and spring but subdivided into two regions in the summer and autumn. In the first case, the system typically shows relatively low-temperature and salinity waters, which give it a subarctic character. In the second, only the region north of Punta Eugenia (28°N) maintains subarctic characteristics, while the southern region receives an inflow of tropical and subtropical waters that results from the weakening of northwesterly winds, which allows the poleward advection of surface waters. Also during this period, a positive wind stress curl promotes the zonal advection of North Pacific's eastern edge waters into the coast and to the north as a surface coastal flow. Average seasonal patterns of geostrophic flow at 200 dbar revealed that the differentiation into provinces is also evident at that depth, with two clearly defined cyclonic structures in summer and autumn, both separated at the latitude of Punta Eugenia. The analyses conducted also showed a clear continuity of the California undercurrent along the shelf break, with more diffuse currents in the winter. Poleward flows were observed throughout the water column, especially in summer and autumn, although the origin of the surface flow does not necessarily involve a surfacing of the California Undercurrent. © 2015. American Geophysical Union. All Rights Reserved.
Cazarez-Castro N.R.,Autonomous University of Baja California |
Aguilar L.T.,National Polytechnic Institute of Mexico |
Castillo O.,Insituto Tecnologico de Tijuana
Expert Systems with Applications | Year: 2010
The paper presents a hybrid architecture, which combines Type-1 or Type-2 fuzzy logic system (FLS) and genetic algorithms (GAs) for the optimization of the membership function (MF) parameters of FLS, in order to solve to the output regulation problem of a servomechanism with nonlinear backlash. In this approach, the fuzzy rule base is predesigned by experts of this problem. The proposed method is far from trivial because of nonminimum phase properties of the system. The simulation results illustrate the effectiveness of the optimized closed-loop system. © 2009 Elsevier Ltd. All rights reserved.
Ruiz-Marin A.,Autonomous University of Carmen |
Mendoza-Espinosa L.G.,Autonomous University of Baja California |
Stephenson T.,Cranfield University
Bioresource Technology | Year: 2010
Two species of microalgae growing as immobilized and free-cells were compared to test its ability to remove N and P in batch cultures of urban wastewater. The best microalgae-cell growth configuration was selected to be tested in bioreactor operated in semi-continuous mode. Scenedesmus obliquus showed a higher N and P uptake rate in urban wastewater than Chlorella vulgaris. When tested in semi-continuous mode and with the re-calcification of beads, S. obliquus was more effective in removing N and P for longer periods (181 h) than batch cultures; fecal coliforms removal was good (95%) although the final concentration was still unsuitable for discharge to natural water bodies. Protein and lipids content analysis suggest that, from a practical point of view, immobilized systems could facilitate the separation of the biomass from the treated wastewater although in terms of nutritional value of the biomass, immobilized systems do not represent an advantage over free-cell systems. © 2009 Elsevier Ltd. All rights reserved.
Ruelas J.,Sonora Institute of Technology |
Velazquez N.,Autonomous University of Baja California |
Cerezo J.,Autonomous University of Baja California
Applied Energy | Year: 2013
This study develops and applies a new mathematical model for estimating the intercept factor of a Scheffler-type solar concentrator (STSC) based on the geometric and optical behaviour of the concentrator in Cartesian coordinates, and the incorporation of a thermal model of the receptor is performed using numerical examinations to determine the technical feasibility of attaching the STSC to a 3. kWe Stirling engine. A numerical validation of the mathematical model is determined based on the experimental results reported for the WGA500 concentrator and the CNRS-PROMES system receiver. The numerical results allow for the design of the STSC and a comparison with a parabolic dish that provides the same thermal demand. Our findings show that the highest concentration was obtained with an edge angle of 45°, which was observed in the parabolic dish as well, but the STSC receiver shows a 7% increase in the thermal efficiency compared with the efficiency of the parabolic dish receiver. Finally, the STSC is appropriate for regions where the solar height allows for a reduction of convective thermal loss. © 2012 Elsevier Ltd.
Aguilar-Virgen Q.,Autonomous University of Baja California |
Taboada-Gonzalez P.,Autonomous University of Baja California |
Ojeda-Benitez S.,Autonomous University of Baja California |
Cruz-Sotelo S.,Autonomous University of Baja California
Renewable and Sustainable Energy Reviews | Year: 2014
Estimations of biogas emissions in final disposal sites have been studied by several researchers, primarily for their potential as a renewable source of energy and greenhouse gas emissions mitigation. Different models have been developed to predict the generation of biogas; the first-order model is widely used. Most of these models are based on two parameters, the methane generation rate (k) and methane generation potential (L0). These parameters cannot be generalized for biogas estimation in any site, and must be modified according to in situ characteristics. The objectives of this research are (a) modify the constants of k and L0 with in situ data, and (b) estimate the biogas generation in a sanitary landfill of a Mexican city using the modified constants. The following data were used in modifying the model constants biogas: (a) waste characterization studies, (b) biogas extraction tests, (c) observations of characteristics and sanitary landfill operation, (d) interviews with the managers of the sanitary landfill, and (e) several parameters of the Intergovernmental Panel on Climate Change (IPCC) model. Biogas estimation using the modified constants was performed in the version 2.0 Mexico Landfill Gas Model proposed by Stearns, Conrad and Schmidt Consulting Engineers, Inc. (SCS Engineers). The results show that approximately 70% of the waste generated is organic, which influences the value of the parameters used in calculating the k and L0. With in situ characteristics, values of k=0.0482 yr-1 and L0=94,457 m3/t were obtained. It is projected that the electric power generation could reach a maximum capacity of 2.4 MW in 2019. This energy could increase the installed capacity in the Ensenada by approximately 4.36% and supply approximately 66% of the electric energy required for lighting, which amounts to savings of US$2.62 million and an environmental benefit of approximately 1.17 Mt CO2e from 2009 to 2025. © 2013 Elsevier Ltd. All rights reserved.