Recent Submissions

  • Comparative analysis of cross-platform communication mechanisms

    Atencio, Luis; Aybar, Bruno; Barrientos Padilla, Alfredo; (Association for Computing Machinery, 2018)
    The present research aims to compare the different technologies that allow real-time communication between Android and iOS devices. We conducted a measurement-driven experiment to test the performance of each technology under different scenarios. We determine their functionality according to the environment for which they have been developed, showing competent information about their capabilities based on the communication channel they use, and their performance measured in milliseconds. The final results allow mobile application developers to determine which technologies suits them the best, based on the specific context of their projects.
    Acceso restringido temporalmente
  • PMMA-Assisted Plasma Patterning of Graphene

    Bobadilla, Alfredo D.; Ocola, Leonidas E.; Sumant, Anirudha V.; Kaminski, Michael; Seminario, Jorge M.; (Hindawi Limited, 2018)
    Microelectronic fabrication of Si typically involves high-temperature or high-energy processes. For instance, wafer fabrication, transistor fabrication, and silicidation are all above 500°C. Contrary to that tradition, we believe low-energy processes constitute a better alternative to enable the industrial application of single-molecule devices based on 2D materials. The present work addresses the postsynthesis processing of graphene at unconventional low temperature, low energy, and low pressure in the poly methyl-methacrylate- (PMMA-) assisted transfer of graphene to oxide wafer, in the electron-beam lithography with PMMA, and in the plasma patterning of graphene with a PMMA ribbon mask. During the exposure to the oxygen plasma, unprotected areas of graphene are converted to graphene oxide. The exposure time required to produce the ribbon patterns on graphene is 2 minutes. We produce graphene ribbon patterns with ∼50 nm width and integrate them into solid state and liquid gated transistor devices.
    Acceso abierto
  • Designing a decision tree for cross-device communication technology aimed at iOS and android developers

    Chioino, Jamil; Contreras, Ivan; Barrientos, Alfredo; Vives, Luis;;;; (Association for Computing Machinery, 2018-04-09)
    This analysis proposes a decision tree for selecting cross-device communication technologies for iOS and Android mobile devices. This tree accelerates the selection of cross-device technologies by taking into account known use cases of interaction. Five different communication technologies were tested (Real-time Multiplayer, Nearby Messages, PeerJS, iBeacon and Eddystone) by means of 13 proof of concept applications distributed between both operating systems (Android-iOS, iOS-iOS, Android-Android) and the design of 20 architecture diagrams of three types: sequence (connection to services and message sending), deployment and component. The decision tree was validated by mobile development experts resulting in a maximum reduction of up to 30 days of technology selection research. The effectiveness of the tree as a tool is 60%, its usefulness 80% and its ease of comprehension 90%, according to the results obtained from the experts.
  • Medidas de asociación en un estudio de factores de riesgo asociados al desarrollo de hipertensión arterial en Chile

    Senosain-Leon, Valeria; Hidalgo, Aída; Petermann, Fanny; Durán, Eliana; Labraña, Ana María; Martínez, María Adela; Leiva, Ana María; Garrido-Méndez, Alex; Poblete-Valderrama, Felipe; Díaz-Martínez, Ximena; Salas, Carlos; Celis-Morales, Carlos; (Sociedad Medica de Santiago, 2018-02)
    “Cartas al editor”
    Acceso abierto
  • Serious Game for the Virtual Practice of the Emplantillado in the Constructive System of adobe with reinforced cane

    George, Centeno; Carlos, Egusquiza; David, Mauricio; Peruvian University of Applied Sciences, Lima, Perú; Peruvian University of Applied Sciences, Lima, Perú; Peruvian University of Applied Sciences, Lima, Perú (Association for Computing Machinery, 2017-12-20)
    At present, the training of university students and the specialization of professionals are accompanied by a series of educational tools based on digital environments and applications for specific areas in education; In this process of application of the technology exists a methodology called Serious Game oriented towards some specific areas like Simulation in subjects of building and construction; Since this field is new in higher education, there are not many specific applications, such as the case of emplantillado for simulation of constructions using adobes reinforced with cane. The objective of this study is to demonstrate that the Serious game methodology, oriented to the teaching the course of the Preliminary Works of the Faculty of Architecture, can improve students learning and optimize their skills for the emplantillado in construction systems using the application for iPad. The application has been tested in a group of twelve students who were part of the experimental group in relation to the execution time, attempts made and qualification obtained; In contrast to evaluate the time to solve the test for emplantillado into de groups that performed the same exercise; an ANCOVA was used to evaluate the main effects and interactions to answer the null hypothesis. This ANCOVA model for balanced cases of type III includes a covariate that is correlated with the dependent variable and means on the dependent variables adjusted due the to the effect the covariate had on it.
  • The Implementation of ISO/IEC 29110 Software Engineering Standards and Guides in Very Small Entities

    Laporte, Claude Y.; O’Connor, Rory V.; García Paucar, Luis Hernán; (Springer International Publishing, 2016-03)
    This paper outlines the details of seven case studies involving the pilot usage of the new standard ISO/IEC 29110standard ‘Lifecycle Profiles for Very Small Entities’, which was specifically designed by Working Group 24 of ISO/IEC JTC1/SC7 to address the standardization needs of Very Small Entities (VSEs). The purpose of this paper is to add substantially to the body of knowledge and the literature on the rollout and implementation of this new and evolving standard and to act as guidance for other researchers in the design and implementation of ISO/IEC 29110 case studies. Furthermore it is hoped that that the lessons learnt from these case studies will help promote the adoption of this new standard in an industrial setting.
    Acceso abierto