On downloading and using COIN-OR for solving linear/integer optimization problems

A more recent version of this paper has been published as Working Paper Biltoki 2011.08.COIN-OR, source code, optimization software

On Downloading and Using CPLEX within COIN-OR for Solving Linear/Integer Optimization Problems

The aim of this technical report is to present some detailed explanations in order to use the solver CPLEX within COIN-OR environment. In particular, we describe how to download, install and use the corresponding source code and libraries under Windows and Linux operating systems. We will use an example taken from the literature, with the experimental code and files written in C++, to describe the whole process of editing, compiling and running the executable, to solve this optimization problem by using this software. In the case of the Windows environment, a C++ compiler is also needed. We will use the Visual C++ 2010 Express Edition.CPLEX, COIN-OR, C++

Smartphone Abuse Amongst Adolescents: The Role of Impulsivity and Sensation Seeking

Adolescence is the stage of development where the reward and emotional regulation systems are yet to be adjusted and where most excessive behaviors start, like smartphone abuse. In addition, in this evolutionary period adolescents are more susceptible to behavioral changes through specific interventions or educational programs. Thus, it is fundamental to analyze the personality profile of those adolescents showing excessive mobile phone usage to properly approach later prevention strategies. Impulsivity is one of the most repeated variables associated with teenage addictions, although it has been observed that not all impulsive behaviors need to be detrimental. The aim of this study is to analyze how impulsivity affects smartphone addiction directly, but also indirectly, by assessing its association with sensation seeking variables (thrill and adventure seeking, experience seeking, disinhibition, and boredom susceptibility) which are in turn decisive when using these technologies improperly. The sample was made up of 614 adolescents aged 13–18 attending secondary education from Burgos, Spain. Dickman Impulsivity Inventory, Sensation Seeking Scale, and Ad-hoc questionnaire on adolescent self-perception as to smartphone use were applied. Results show that 41.4% of participants admit to abusing smartphones sometimes, while 18.3% admit to abusing them more frequently and 24% to, at least ever, having defined themselves as smartphone addicts. Stepwise regression analysis revealed that gender (female), dysfunctional impulsivity and sensation seeking (disinhibition and thrill and adventure seeking) evidence 15.7% of variance in smartphone abuse. In addition, sensation seeking (thrill and adventure seeking, disinhibition, and boredom susceptibility) were found to mediate the relationship between dysfunctional impulsivity and smartphone abuse. Therefore, dysfunctional impulsivity was directly connected with teenage smartphone abuse, but also had an indirect stronger association through thrill and adventure seeking, disinhibition and boredom susceptibility

Relationship between the sensation seeking variable and its relation to the abuse of internet in adolescents

En este estudio pretendemos analizar la relación existente entre los componentes de la variable búsqueda de sensaciones (búsqueda de emociones, búsqueda de experiencias, susceptibilidad al aburrimiento y desinhibición) y la conducta de abuso de internet. La muestra utilizada fue de 634 alumnos, escolarizados en centros de Burgos capital, que cursan segundo ciclo de ESO y Bachillerato. Es importante conocer los indicadores de uso disfuncional de las TIC para afinar la precocidad en los diagnósticos y diseñar estrategias adecuadas de prevención. Creemos que puede ser un estudio que contribuya a mejorar los posteriores programas preventivos.In the present work, we analyse the relationship between the components of the sensation seeking variable and its relation to the abuse of internet. A sample was taken of 634 students who were enrolled in Burgos capital in their second degree of Compulsory Secondary Education and Non-Compulsory Secondary Education. The aim of our study is to clarify some questions about the consequences that the abuse of Information and Communication Technology can be generating in our younger population, in order to improve the precociousness in the diagnosis and propose alternatives and educational answers, so as to prevent and guide adolescents.peerReviewe

On downloading and using COIN-OR for solving linear/integer optimization problems

A more recent version of this paper has been published as Working Paper Biltoki 2011.08.The aim of this technical report is to present some detailed explanations in order to help to use the open source software for optimization COIN-OR. In particular, we describe how to download, install and use the corresponding solvers under Windows and Linux operating systems. We will use an example taken from the literature, with the corresponding source code written in C++, to describe the whole process of editing, compiling and running the executable, to solve this optimization problem by using this software.This research has been partially supported by the projects ECO2008-00777 ECON from the Ministry of Education and Science, and Grupo de Investigación IT-347-10 from the Basque Government, Spain

On Downloading and Using CPLEX within COIN-OR for Solving Linear/Integer Optimization Problems

The aim of this technical report is to present some detailed explanations in order to use the solver CPLEX within COIN-OR environment. In particular, we describe how to download, install and use the corresponding source code and libraries under Windows and Linux operating systems. We will use an example taken from the literature, with the experimental code and files written in C++, to describe the whole process of editing, compiling and running the executable, to solve this optimization problem by using this software. In the case of the Windows environment, a C++ compiler is also needed. We will use the Visual C++ 2010 Express Edition

Desarrollo de un sistema web para el análisis de datos en bioinformática utilizando técnicas de factorización positiva de matrices

Este proyecto tiene como fundamento la integración de diversas tecnologías para construir una aplicación Web capaz de satisfacer las necesidades y requerimientos actuales en el campo del análisis de datos biológicos. La funcionalidad de la web será similar a la de la herramienta existente BioNMF, pero con las ventajas principales de que será accesible desde cualquier ordenador con acceso a la red Internet, sin necesidad de instalar ningún archivo ejecutable, y la mejora significativa en el tiempo de la obtención del resultado, gracias al procesamiento distribuido del análisis de los datos. Palabras clave: NMF, factorización no negativa de matrices, aplicación web, bioinformática, microchips de ADN, aplicación distribuida. [ABSTRACT] The aim of this project is to integrate diverse technologies to build a Web application able to satisfy the present necessities and requirements in the field of bioinformatics data analysis. The functionality of the web will be similar to the one of the existing tool BioNMF, but with the advantages that it will be accessible from any computer with access to the Internet, with no need to install a exe file, and the significant improvement in the time for obtaining the result, thanks to the distributed processing of the data analysis, distributed application. Key words: NMF, non negative matrix factorization, Web application, bioinformatics, DNA microchips

Lagrangean decomposition for large-scale two-stage stochastic mixed 0-1 problems

In this paper we study solution methods for solving the dual problem corresponding to the Lagrangean Decomposition of two stage stochastic mixed 0-1 models. We represent the two stage stochastic mixed 0-1 problem by a splitting variable representation of the deterministic equivalent model, where 0-1 and continuous variables appear at any stage. Lagrangean Decomposition is proposed for satisfying both the integrality constraints for the 0-1 variables and the non-anticipativity constraints. We compare the performance of four iterative algorithms based on dual Lagrangean Decomposition schemes, as the Subgradient method, the Volume algorithm, the Progressive Hedging algorithm and the Dynamic Constrained Cutting Plane scheme. We test the conditions and properties of convergence for medium and large-scale dimension stochastic problems. Computational results are reported.Progressive Hedging algorithm, volume algorithm, Lagrangean decomposition, subgradient method

A note on the implementation of the BFC-MSMIP algorithm in C++ by using COIN-OR as an optimization engine

The aim of this technical report is to present some detailed explanations in order to help to understand and use the algorithm Branch and Fix Coordination for solving MultiStage Mixed Integer Problems (BFC- MSMIP). We have developed an algorithmic approach implemented in a C++ experimental code that uses the optimization engine COmputational INfrastructure for Operations Research (COIN-OR) for solving the auxiliary linear and mixed 0-1 submodels. Now, we give the computational and implementational descrip- tion in order to use this open optimization software not only in the implementation of our procedure but also in similar schemes to be developed by the users.nonanticipativity constraints, cluster partitioning, COIN-OR library, branch-and-fix coordination, multi-stage stochastic mixed 0-1 programming

A parallelizable algorithmic framework for solving large scale multi-stage stochastic mixed 0-1 problems under uncertainty

Preprint submitted to Computers & Operations Researchmulti-stage stochastic mixed 0-1 optimization, nonsymmetric scenario trees, implicit and explicit nonanticipativity constraints, splitting variable and compact representations, scenario cluster partitioning