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Ítem Managing Dynamic Context to Optimize Smart Interactions and Services(2010-01-01) Villegas Machado, Norha MilenaWith the rapid growth of socio-technical ecosystems, smart interactions and services are permeating every walk of life. As smart interactions must managed automatically and interactively in response to evolving user's matters of concern, the smart Internet requires creative approaches where services and interactions are implemented with awareness of, and dynamic adaptation to, users, computational environments, changing policies and unknown requirements. Consequently, modeling and managing dynamic context is critical for implementing smart services and smart interactions effectively. Thus, smart interactions need infrastructure to acquire, compose, and distribute context information to multiple execution endpoints. Moreover, context management must be controlled and governed to optimize system properties. This chapter surveys context modeling and management approaches intended for the optimization of smart interactions and services, discusses the main challenges and requirements of context-awareness in the smart Internet, and provides a feature-based framework useful for the evaluation and implementation of context modeling and management mechanisms. © 2010 Springer-Verlag Berlin Heidelberg.
Ítem Adaptive planning of 3G/4G systems using Q-analysis or polyhedral dynamics(IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC, 2004-01-01) Cardona, NarcisIn this paper we present a method for use Q-analysis in the initial planning process and later dynamic adaptation for 3G/4G cellular systems that intends to balance load in order to maximize capacity and reduce lost and dropped calls independently of the type of service. We support our proposal on dynamic simulations made with an own developed tool for dynamic simulations of CDMA systems, and show initial results that partially probe our proposed method.Ítem A virtual surgical telesimulation in micrographic dermatologic surgery (MOHS)(Elsevier, 2003-06-01) Vélez, J.AThe development and propagation of surgical procedures in dermatology establish a need for an approach to a new way of teaching and supporting techniques which use emergent technologies. Our work is based upon a generic concept of software architecture for telemedicine applications, which could provide educational telesimulation in the dermatologic surgery technique known as Mohs micrographic surgery. This technique is used in the neoplasia resection treatment. Actually, the modules proposed are evolving in the Internet platform and are planned to interact in a cyclic manner from a diagnostic precision aid, through a planning surgical tool, to a simulator facility.Ítem Software platform for services in Colombian cities using the Living Labs approach(Ieee, 2011-12-05) Navarro Cadavid, AndrésComponent Based Software Engineering is a way to improve software modularization and to embed architectural concerns in the source code. Making explicit the architectural concerns in code helps to mitigate the problem of architectural erosion. The restructuring of legacy code with components in mind requires the use of tools to assess compliance with component programming principles. The property of communication integrity is one of the major principles for implementing software architectures. However, there is a paucity of tools for assessing the quality of code components. To cope with this issue, we define a component model in Java and a tool for identifying component types, which relies on a set of rules to statically check potential violations of the communication integrity property in Java source code. We illustrate its application with a case study and report the results of our experiments with it.Ítem Machine learning classifiers for android malware analysis(Institute of Electrical and Electronics Engineers Inc., 2016-04-27) Cadavid, Andres NavarroAndroid is an operating system which currently has over one billion active users for all their mobile devices, with a market impact that is influencing an increase in the amount of information that can be obtained from different users, facts that have motivated the development of malware by cybercriminals. To solve the problems caused by malware, Android implements a different architecture and security controls, such as unique user ID (UID) for each application, system permissions, and its distribution platform Google Play. It has been shown that there are ways to violate that protection, and how the complexity for create a new solutions are increased while cybercriminals improve their skills to develop malware.Ítem New tools and methodologies for programming languages learning using the scribbler robot and Alice(IEEE, 2011-10-12) Londono Salcedo, SebastianToday is often raised the question, what happened to engineering? Each day are less aspiring to such programs, and we need to find innovative ways to motivate students, encouraging learning fun, and that his time, guaranteeing a solid covering topics that are usually evaluated in the first programming courses, some of the tools that were used during the experience at the University Icesi for teaching programming and Alice were Scribble robot, the which allowed students to interact with the fast world of programming. The teaching methodology had proven that through it the student can interact with a friendly interface that let users explore and use the concepts seen in the programming courses, encouraging students to improve their capacity through algorithmic understanding. Working with new strategies in the teaching of computer courses, is a fundamental pillar in the education of future engineers, given that capacity building fosters algorithmic analysis and problem solving skills as required by engineers. This paper will present the progress and results obtained using different programming interfaces and robots, as a complement to the basic algorithms and programming languages. It also will review the differences between traditional teachings vs. new tools for learning. © 2011 IEEE.Ítem Improving context-awareness in self-adaptation using the DYNAMICO reference model(IEEE, 2013-05-20) Muller, Hausi A.Self-adaptation mechanisms modify target systems dynamically to address adaptation goals, which may evolve continuously due to changes in system requirements. These changes affect values and thresholds of observed context variables and monitoring logic, or imply the addition and/or deletion of context variables, thus compromising self-adaptivity effectiveness under static monitoring infrastructures. Nevertheless, self-adaptation approaches often focus on adapting target systems only rather than monitoring infrastructures. Previously, we proposed DYNAMICO, a reference model for self-adaptive systems where adaptation goals and monitoring requirements change dynamically. This paper presents an implementation of DYNAMICO comprising our SMARTERCONTEXT monitoring infrastructure and QoS-CARE adaptation framework in a self-adaptation solution that maintains its context-awareness relevance. To evaluate our reference model we use self-adaptive system properties and the Znn.com exemplar to compare the Rainbow system with our DYNAMICO implementation. The results of the evaluation demonstrate the applicability, feasibility, and effectiveness of DYNAMICO, especially for self-adaptive systems with context-awareness requirements. © 2013 IEEE.Ítem Adaptación Automática de Software (in Spanish)(2011-03-31) Villegas Machado, Norha MilenaThe ability of organizations and their products, systems, and services to compete, adapt, and survive will depend increasingly on software and on the ability to integrate related software-intensive systems into systems of systems.Boehm (ICSE 2006)Ítem A novel approach to optimal resource allocation in HETnets based on the CINR requested by users(IEEE, 2013-09-08) Pachon De La Cruz, AlvaroThis paper presents an approach for solving the resource allocation problem in heterogeneous networks (HETnets). An optimization model is formulated; its main objective is to achieve the best Quality of Service (QoS) measured by the Carrier to Interference Noise Ratio (CINR). This model is a quadratically constrained optimization problem with continuous and boolean variables. It is solved by an approximation by a sequence of linear optimization problems and a judicious allocation of frequency blocks. It attempts to satisfy the CINR values required by users and demanded by modern standards in data transmission. Theoretically, the model can detect whenever the system cannot fulfill the CINR required, in which case, its solution offers the service provider an allocation of resources that yields a good index of performance. This is reported in numerical simulations that resemble real scenarios of HETnets. The approach configures, in a flexible way, the exploration of the search space, the strategy of frequency block allocation to users, and the solution considered as acceptable by the service provider. © 2013 IEEE.Ítem Affective decisions and recommender systems(Universidad de los Andes, 2014-10-06) Ospina, Mateo[Sin resumen disponible]