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1. Genetic Programming Model Regularization

Author

Alonso, César L., Montaña, José Luis, Borges, Cruz Enrique, Kacprzyk, Janusz, Series editor, Madani, Kurosh, editor, Dourado, António, editor, Rosa, Agostinho, editor, and Filipe, Joaquim, editor

Published
2016
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4. Penalty Functions for Genetic Programming Algorithms

Author

Montaña, José L., Alonso, César L., Borges, Cruz Enrique, de la Dehesa, Javier, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Murgante, Beniamino, editor, Gervasi, Osvaldo, editor, Iglesias, Andrés, editor, Taniar, David, editor, and Apduhan, Bernady O., editor

Published
2011
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5. Adaptation, Performance and Vapnik-Chervonenkis Dimension of Straight Line Programs

Author

Montaña, José L., Alonso, César L., Borges, Cruz E., Crespo, José L., Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Vanneschi, Leonardo, editor, Gustafson, Steven, editor, Moraglio, Alberto, editor, De Falco, Ivanoe, editor, and Ebner, Marc, editor

Published
2009
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9. A Flipping Local Search Genetic Algorithm for the Multidimensional 0-1 Knapsack Problem

Author

Alonso, César L., Caro, Fernando, Montaña, José Luis, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Carbonell, Jaime G., editor, Siekmann, Jörg, editor, Marín, Roque, editor, Onaindía, Eva, editor, Bugarín, Alberto, editor, and Santos, José, editor

Published
2006
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10. On the Number of Random Digits Required in MonteCarlo Integration of Definable Functions

Author

Alonso, César L., Montaña, Josè L., Pardo, Luis M., Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Jȩdrzejowicz, Joanna, editor, and Szepietowski, Andrzej, editor

Published
2005
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11. An Evolutionary Strategy for the Multidimensional 0-1 Knapsack Problem Based on Genetic Computation of Surrogate Multipliers

Author

Alonso, César L., Caro, Fernando, Montaña, José Luis, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Mira, José, editor, and Álvarez, José R., editor

Published
2005
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12. An Evolutionary Algorithm for Solving Word Equation Systems

Author

Alonso, César L., Drubi, Fátima, Montaña, José Luis, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Carbonell, Jaime G., editor, Siekmann, Jörg, editor, Conejo, Ricardo, editor, Urretavizcaya, Maite, editor, and Pérez-de-la-Cruz, José-Luis, editor

Published
2004
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20. How Long Does It Take To Shock Again?

Author

Roza-Alonso, César L. and García García, J.J.

Abstract

PURPOSE OF STUDYTo study the time interval between consecutive shocks in OHCA when ACLS is provided as an indirect indicator of time management during CPR cycles according to 2015 ERC Guidelines.MATERIAL AND METHODSDescriptive, observational, retrospective study.Study period: January 1st 2014 to December 31st 2016. We define event as the presence of ventricular fibrillation (VF) for at least 3 consecutive rhythm analyses.Other studies define CPR cycle time in 120 s, optimal rhythm check time in 4 s, time to charge the defibrillator up to 200J in 7 s and shock delivery and resuming CPR in 1 s; therefore, the optimal time in between shocks is 133 s. We define, for analysis, an optimal time range between 133-146 s. Inclusion criteria: OHCA with one or more events assisted by SAMU-Asturias.Data collected from clinical records and event log from the monitor/defibrillator.Statistical analysis with SPSS Statistics 21 software.RESULTS1706 OHCA registered: 114 meet inclusion criteria, with 127 events and 680 time intervals between shocks.Mean interval between shocks is 134,1 s (SD= 49,9 s).15.9% of intervals between shocks are in the optimal time range.CONCLUSIONS- The optimal time range rate can be considered an indirect indicator of CPR quality.- Most of shocks are delivered in the 2 to 3 min interval.- Our optimal time range rate seems to be very low, though there are no standards to compare with.- Our study shows higher rates of time below the lower limit of the optimal time range.- Time control measures must be implemented during ACLS in OHCA.

Published
2017

21. First Shock Delays In Out-Of-Hospital Cardiac Arrest

Author

Roza-Alonso, César L., García García, J.J., Cuervo Menéndez, J.M., Fente Alvarez, A.I., and García Castro, A.

Abstract

PURPOSE OF THE STUDYTo determine the time u201ccall-first shocku201d in OHCA in our units and to study time intervals involved in it: u201ccall-dispatchu201d, u201cdispatch-monitor onu201d, u201cmonitor on-first shocku201d.MATERIAL AND METHODSTo determine the time u201ccall-first shocku201d in OHCA in our units and to study time intervals involved in it: u201ccall-dispatchu201d, u201cdispatch-monitor onu201d, u201cmonitor on-first shocku201d.RESULTS1706 OHCA registered: 126 (7.38%) meet inclusion criteria.Mean interval between call and shock is 14 m 42 s (DS=385 s).Using Tanigawau2019s intervals our findings show:Delay over 13 m is 51,6%, being lower than 9 m in 14.3% of cases.Delays bigger than 20 min are just 13.5%.Mean interval between call and ALS team dispatch is 2 m 15 s (SD=78 s).Mean interval between ALS team dispatch and when the monitor is switched on is 10 m 21 s (SD=343 s).Mean interval between u201cmonitor switched onu201d and the first shock is 2 m 8 s. (SD=68 s).CONCLUSIONS- OHCA have specific difficulties that imply delays in the first shock delivery (patients hard to reach, excess of clothes, unsafe area) that have to be studied. - Our intervals u201ccall-first shocku201d seem to be better than in other published studies.- Interval variability can be due to the absence of a fixed procedure regarding the moment to turn the monitor on in our units.- Rates of time u201cmonitor on-shocku201d higher than two minutes have to be studied further.

Published
2017

22. Cardiac Arrests In Sports Events

Author

Roza-Alonso, César L., Cuervo-Menéndez, J.M., García García, J.J., Díaz-Fernández, M.E., García Alonso, M., and Martinez del Valle, M.

Abstract

PURPOSE OF THE STUDYSudden cardiac arrest during sports is an extremely uncommon event that has a very strong social impact. We aim to study the basic epidemiological characteristics and outcome when life support is performed and compare to those in overall population (OP).MATERIAL AND METHODSDescriptive, retrospective, observational study.Study period: January 1st 2015 to December 31st 2016.Inclusion criteria: OHCA at sports event (Utstein definition) assisted by SAMU-Asturias, regardless of the/treatment: BLS, ACLS or no treatment. Data collected from clinical reports and Utstein based OHCA registry and analysed with SPSS Statistics 21 software.RESULTSOut of 1108 OHCA registered, 7 (0.6%) at sports events. 6 patients (85.7%) male; average age, 48.1 years (s=21.8), being 66.7 (s=16.3) in OP. Witnessed OHCA in 85.7% of cases, being 66.3% in OP. Bystander BLS in 6 patients (85.7%), use of AED in 3 (42.9%), all with shock delivered; in OP use of AED in 159 cases (14.4%), with shock delivered in 46 (28.8% of them). ACLS by an EMS unit in 2 patients, both with initial shockable rhythm, and postresuscitation care, due to return to spontaneous circulation prior to the EMS team arrival, in 1 patient. All 3 were survived events (100%); in OP rate was 25.9% (p=0.01). 100% with hospital discharge: neurological outcome, CPC 1, 2 patients (66.6%), CPC 4, 1 patient (33.3%).CONCLUSIONS- The incidence proves to be extremely low thus limiting the statistical validity of this study.- Trends show high rate of witnessed CA, of bystander CPR and better short-term survival in those with survived event.- Utstein definition does not discriminate organised sport events and casual sports practice.

Published
2017

23. Fibrinolysis : a Needed Check Up

Author

Roza-Alonso, César L., Diaz Fernández, M.E., Cuervo Menéndez, J.M., García García, J.J., García, M. Alonso, and Martínez del Valle, M.

Abstract

Fibrinolysis: a needed check up PURPOSE OF THE STUDYUtstein based OHCA registry shows an increase, during 2016, of the use of fibrinolytics in cardiac arrests (OHCA). To determine the conditions of its use, to check compliance with ERC Guidelines and to compare results with those from our previous series. MATERIALS AND METHODSDescriptive, retrospective, observational study of the OHCA assisted by SAMU-Asturias.Study period: July 1st 2013 to December 31st 2016.Inclusion criteria: Patients that received fibrinolytics during ACLS provided by EMS. Patients with suspected acute pulmonary embolism (APE) OHCA, with or without use of fibrinolytics.Data collected from clinical reports and Utstein based OHCA registry.Data analysed with SPSS Statistics 21 software.RESULTSOut of 2251 PC registered, 31 (1.37%) received fibrinolytics during ACLS: 16 before 2016, and 15 in 2016. The increase is statistically significant (p=0.021). 23 patients (74.2%) male: average age, 56.5 years (s=15.3). Table I shows the epidemiological variables studied related to these events.9 (29.0%) survived events, all in 2016: 6 with suspected cardiac etiology, 3 with suspected APE. Average time of return of spontaneous circulation (ROSC) after administration of fibrinolytics: 20.2 min (s=16.7) [2-53]. Discharge with CPC 1-2 in 3 cases (9.7%), witnessed CA of cardiac etiology with initial shockable rhythm.Figure 1 shows CPR times after fibrinolysis in patients without ROSC.Table II shows the management of suspected APE.CONCLUSIONSThere is a higher use of fibrinolytics in OHCA in 2016.Higher use does not reflect in survival rate.Most of fibrinolytics were used in non suspected APE OHCA.Recommended CPR time after administration of fibrinolytics is not accomplished.There seems to be a contagion effect on treatment in OHCA due to suspected APE and OHCA of cardiac etiology, which according to literature is contraindicat

Published
2017

25. Fibrinolysis: A needed check up

Author

Fernandez, Maria Eugenia Diaz, primary, Menendez, Jose Manuel Cuervo, additional, Garcia, Juan Jose Garcia, additional, Alonso, Maria Garcia, additional, Valle, Marta Martinez del, additional, and Roza-Alonso, César L., additional

Published
2017
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26. Evaluación del Plan de Emergencias Interior de un Hospital Comarcal

Author

Roza Alonso, César L. and Castro Delgado, Rafael

Subjects
Análisis de Seguridad, Hospital Seguro, Planificación de Desastres
Abstract

Introducción: Los hospitales son instituciones especialmente sensibles ante las emergencias. Prestan asistencia a los heridos, y tienen alto valor simbólico como lugares que preservan la vida y la seguridad, pero son susceptibles a sufrir una situación crítica, y deben estar preparados para responder a ésta de manera eficaz. Metodología: Comparamos el Plan de Emergencias Interior del Hospital Carmen y Severo Ochoa, vigente desde 1993, con otros dos documentos con enfoques diferenciados: la Norma Básica de Autoprotección, que aporta un marco teórico, y con estándares operativos definidos en el programa Hospitales Seguros de la OMS, dentro del Índice de Seguridad Hospitalaria, que valoran su implantación. Resultados: Este estudio objetiva un plan con muy pocos puntos débiles al compararlo con el primero, pero que no supera los mínimos exigidos por la OMS, al no haber sido implantado correctamente entre el personal del hospital. Conclusiones: Debe mejorarse la implantación del plan para considerar que podría resultar operativo, en caso de tener que ser activado, y de esa manera, el hospital pueda cumplir con las expectativas que la sociedad tiene depositadas en él.

Published
2012

27. Una propuesta genérica de trabajo en grupo y su aplicación en una asignatura de fundamentos teóricos de la Informática

Author

Alonso, César L., Fernández-Combarro, Elías, and Montaña, José Luis

Subjects
Informática, Enseñanza universitaria
Abstract

En la presente comunicación se describen las actividades que conforman una propuesta de trabajo en grupo, así como algunos mecanismos que ayudan en el proceso de evaluación. Asimismo, se presentan los resultados obtenidos tras llevar a cabo la propuesta en una asignatura de último curso de una Ingeniería Técnica Informática. Una de las motivaciones de los autores a la hora de diseñar la propuesta, fue la de establecer actividades de grupo cuya realización de forma individual fuese complicado. Además, también se ha tratado de proponer trabajos que no fuera posible realizarlos exclusivamente a base de recopilación de material de la web, junto con labores de “copy/paste”. Un proceso de evaluación periódica del trabajo que se va realizando, supone un buen complemento para que el conjunto de la propuesta tenga éxito y se alcancen los objetivos perseguidos.

Published
2008

28. Una propuesta didáctica en el marco del EEES para involucrar al alumno en el método docente

Author

Alonso, César L. and Fernández-Combarro, Elías

Subjects
Informática, Enseñanza universitaria
Abstract

El presente trabajo constituye una memoria sobre la experiencia docente que se ha realizado durante el primer cuatrimestre del curso académico 2005/2006 en una asignatura de último curso de la titulación de Ingeniería Técnica Informática de Sistemas, correspondiente a la E.U.I.T. Informática de Gijón. La intención de los autores es poner de manifiesto las medidas concretas adoptadas, los resultados obtenidos, y una posible adaptación de la asignatura de cara a la próxima entrada en vigor del EEES.

Published
2006

37. A Word Equation Solver Based on Levensthein Distance.

Author

Carbonell, Jaime G., Siekmann, Jörg, Gelbukh, Alexander, Kuri Morales, Ángel Fernando, Alonso, César L., Alonso, David, Callau, Mar, and Montaña, José Luis

Abstract

Many regularity properties of strings, like those appearing in hardware specification and verification, can be expressed in terms of word equations. The solvability problem of word equations is NP-hard and the first algorithm to find a solution for a word equation, when this solution exists, was given by Makanin in 1977. The time complexity of Makanin's algorithm is triple exponential in the length of the equations. In this paper we present an evolutionary algorithm with a local search procedure that is efficient for solving word equation systems. The fitness function of our algorithm is based on Levensthein distance considered as metric for the set of 0-1 binary strings. Our experimental results evidence that this metric is better suited for solving word equations than other edit metrics like, for instance, Hamming distance. [ABSTRACT FROM AUTHOR]

Published
2007
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38. Finiteness Properties of Some Families of GP-Trees.

Author

Carbonell, Jaime G., Siekmann, Jörg, Borrajo, Daniel, Castillo, Luis, Corchado, Juan Manuel, Alonso, César L., and Montaña, José Luis

Abstract

We provide upper bounds for the Vapnik-Chervonenkis dimension of classes of subsets of that can be recognized by computer programs built from arithmetical assignments, infinitelydifferentiable algebraic operations (like k-root extraction and, more generally, operations defined by algebraic series of fractional powers), conditional statements and while instructions. This includes certain classes of GP-trees considered in Genetic Programming for symbolic regression and bi-classification. As a consequence we show explicit quantitative properties that can help to design the fitness function of a GP learning machine. [ABSTRACT FROM AUTHOR]

Published
2007
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39. Vapnik-Chervonenkis Dimension of Parallel Arithmetic Computations.

Author

Carbonell, Jaime G., Siekmann, Jörg, Hutter, Marcus, Servedio, Rocco A., Takimoto, Eiji, Alonso, César L., and Montaña, José Luis

Abstract

We provide upper bounds for the Vapnik-Chervonenkis dimension of concept classes parameterized by real numbers whose membership tests are programs described by bounded-depth arithmetic networks. Our upper bounds are of the kind O(k2d2), where d is the depth of the network (representing the parallel running time) and k is the number of parameters needed to codify the concept. This bound becomes O(k2d) when membership tests are described by Boolean-arithmetic circuits. As a consequence we conclude that families of concepts classes having parallel polynomial time algorithms expressing their membership tests have polynomial VC dimension. [ABSTRACT FROM AUTHOR]

Published
2007
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40. A Flipping Local Search Genetic Algorithm for the Multidimensional 0-1 Knapsack Problem.

Author

Marín, Roque, Onaindía, Eva, Bugarín, Alberto, Santos, José, Alonso, César L., Caro, Fernando, and Montaña, José Luis

Abstract

In this paper we present an evolutionary strategy for the multidimensional 0-1 knapsack problem. Our algorithm incorporates a flipping local search process in order to locally improve the obtained individuals and also, a heuristic operator which computes problem-specific knowledge, based on the surrogate multipliers approach introduced in [12]. Experimental results show that our evolutionary algorithm is capable of obtaining high quality solutions for large size problems and that the local search procedure significatively improves the final obtained result. Keywords: Evolutionary computation, genetic algorithms, knapsack problem, linear 0-1 integer programming. [ABSTRACT FROM AUTHOR]

Published
2006
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41. On the Number of Random Digits Required in MonteCarlo Integration of Definable Functions.

Author

Jedrzejowicz, Joanna, Szepietowski, Andrzej, Alonso, César L., Montaña, Josè L., and Pardo, Luis M.

Abstract

Semi-algebraic objects are subsets or functions that can be described by finite boolean combinations of polynomials with real coefficients. In this paper we provide sharp estimates for the the precision and the number of trials needed in the MonteCarlo integration method to achieve a given error with a fixed confidence when approximating the mean value of semi-algebraic functions. Our study extends to the functional case the results of P. Koiran ([7]) for approximating the volume of semi-algebraic sets. Keywords: MonteCarlo algorithms, discrepancy bounds, learning theory, Chebyshev inequalities, semi-algebraic geometry. [ABSTRACT FROM AUTHOR]

Published
2005
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42. An Evolutionary Strategy for the Multidimensional 0-1 Knapsack Problem Based on Genetic Computation of Surrogate Multipliers.

Author

Mira, José, Álvarez, José R., Alonso, César L., Caro, Fernando, and Montaña, José Luis

Abstract

In this paper we present an evolutionary algorithm for the multidimensional 0-1 knapsack problem. Our algorithm incorporates a heuristic operator which computes problem-specific knowledge. The design of this operator is based on the general technique used to design greedy-like heuristics for this problem, that is, the surrogate multipliers approach of Pirkul (see [7]). The main difference with work previously done is that our heuristic operator is computed following a genetic strategy -suggested by the greedy solution of the one dimensional knapsack problem- instead of the commonly used simplex method. Experimental results show that our evolutionary algorithm is capable of obtaining high quality solutions for large size problems requiring less amount of computational effort than other evolutionary strategies supported by heuristics founded on linear programming calculation of surrogate multipliers. Keywords: Evolutionary computation, genetic algorithms, knapsack problem, 0-1 integer programming, combinatorial optimization. [ABSTRACT FROM AUTHOR]

Published
2005
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44. Habitat use and population density of the houbara bustard Chlamydotis undulata in Fuerteventura (Canary Islands).

Author

Carrascal, Luis M., Palomino, David, Seoane, Javier, and Alonso, César L.

Subjects
BIRD habitats, HABITAT selection, RARE birds, ENDANGERED species, ANIMAL population density
Abstract

Copyright of African Journal of Ecology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2008
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