Time filter

Source Type

Colonia Morelos de Guadalupe de Rivera, Mexico

Centro de Enseñanza Técnica y Superior , commonly referred to as CETYS Universidad or CETYS University, is an educational system in the border between Mexico and the United States.Located in the state of Baja California, México, and with campuses in Mexicali, Tijuana, and Ensenada, CETYS University currently offers undergraduate and graduate degrees in Business and Management, Engineering, and Social science and Humanities, as well as a High School offering the International Baccalaureate program. It is currently the only institution in Mexico accredited by the Western Association of Schools and Colleges . It is one of the few universities in the country that have been accredited by international accreditation agencies. It is well known for its internationalization programs, as well as its strong ties with both the industrial sector and the community. Wikipedia.

Lopez-Leyva J.A.,CETYS University | Arvizu-Mondragon A.,CICESE
DYNA (Colombia) | Year: 2016

This paper details the design and implementation of a simultaneous dual true random numbers generator using only one laser and a digital signal processing system with a DE0 Nano FPGA. We implemented the random generator in such a way that a vacuum optical field will exist in our system. Taking advantage of the inherently random nature of the field, simultaneously quadrature components are measured in order to generate a truly random voltage signal. Also, we used a dynamical system of statistical analysis to eliminate any residual component of direct current on output voltage signal due to an (unavoidable) optical power imbalance in the optical system that was implemented. Finally, were measured the parameters of the auto-correlation and bias probability with values of 0.00010, 0002, respectively, which means that our system can be considered as a true random sequence generator capable of producing two sequences in an independent manner with a bit rate of up to 25 MHz. © The author; licensee Universidad Nacional de Colombia.

Leyva J.A.L.,CETYS University | Mondragon A.A.,CICESE
Microwave and Optical Technology Letters | Year: 2015

On this article, we present a technique to detect photon number splitting (PNS) attacks in the quantum channel of a continuous variable-quantum key distribution system using weak coherent states with phase diffusion by means of the S-parameterized quasiprobability function of a quantum state in steady state. Such quasiprobability function is obtained with an optoelectronic Costas loop. We compare the performances of PNS attack systems considering in first place just the attenuation and then the attenuation with the vacuum noise added due to a spy system. © 2015 Wiley Periodicals, Inc.

Seingier G.,Autonomous University of Baja California | Espejel I.,Autonomous University of Baja California | Ferman-Almada J.L.,Autonomous University of Baja California | Gonzalez O.D.,Autonomous University of Baja California | And 3 more authors.
Ecological Indicators | Year: 2011

To better understand the relation between coastal areas and their influence on social and economic conditions of municipalities, a set of indexes were developed to characterize coastal Mexico with an interdisciplinary approach. The composite of these bio-physical, social and economic indexes is referred to as an "integrated coastal orientation index". Coastal characteristics should be taken into account in the coastal management policy formulation of a given region, and this index can be used to identify key areas for environmental protection or economic development at a national level. The results suggest that municipalities must manage their coastal jurisdictions, a large and diverse array of coastal space and ecosystems, medium to weak spatial demographics and settlement structures, infrastructure to improve qualityoflife,anoverall low coastal population income, and various coastal activities. Spatial heterogeneity along the littoral zone in the coastal orientation led us to conduct a state analysis. We discuss these values and identify five highly coastal-orientated states in the extremes of the country. The development of this tool could help to pin-point different types of key areas within the regions studied and provide a tool to guide regional priorities. As an example, using a combination of extreme values of bio-physical, social and economic indexes was used to identify specific municipalities as candidates for environmental protection and others as areas where development can continue. Choices of indexes are discussed, and the relative importance given to each component of the coastal orientation (rather bio-physical, social and/or economic) will define the course of the coast's development and its sustainability. © 2010 Elsevier Ltd. All rights reserved.

Machin-Mastromatteo J.D.,CETYS University
Communications in Computer and Information Science | Year: 2015

This paper summarizes the theories, methods, and results of a doctoral research that integrated social media (SM) in a learning experience for students and explored the roles that information literacy, digital literacy, and new literacies played in such a learning experience. Participatory action research was the methodological approach used for two rounds of data collection, resulting in the development of the research framework ‘Doing Online Relearning through Information Skills’ (DORIS). The data collection methods used included students’ reports, diagnostic, and final questionnaires; and semi-structured interviews. Data analysis relied on content analysis, open coding, and constant comparative analysis. This paper provides a summary of the discussion leading to the answers to the research questions, including topics such as issues and challenges of using SM for learning; participants learning experiences in such a technologically mediated environment, their engagement and the mutual shaping of SM, learning experiences, and literacies. © Springer International Publishing Switzerland 2015.

Vargas M.,National Autonomous University of Mexico | Castillo H.A.,CETYS University | Restrepo-Parra E.,National University of Colombia | De La Cruz W.,National Autonomous University of Mexico
Applied Surface Science | Year: 2013

Thin films were synthesized in a magnetron sputtering system using a target of Ta with 99.99% purity and silicon substrates (1 1 1). The gases used for the film growth were (Ar + N2), (Ar + CH4 + N2) and (Ar + CH4) mixtures for TaN, TaCN and TaC, respectively. The substrate temperature increased from room temperature to 500 C. The chemical composition and bonding configuration were examined using X-ray photoelectron spectroscopy (XPS), revealing TaN, TaCN, TaC and CC bonds. Moreover, the crystallographic structure was analyzed using X-ray diffraction (XRD), indicating the presence of (1 1 1) and (2 0 0) planes belonging to a face-centered cubic structure. The stoichiometry variation dependence on the CH4 and N2 flow was analyzed, and the influence of the substrate temperature on the coatings was investigated. Finally, scanning electron microscopy (SEM) was used to determine the evolution on the grain formation in the coatings as the substrate temperature increased. © 2013 Published by Elsevier B.V.

Discover hidden collaborations