Browsing Data Science (DS) by Title
Now showing items 120 of 134

A decision tree to assess shortterm mortality after an emergency department visit for an exacerbation of COPD: A cohort study
(Respiratory Research, 20151231)Background: Creating an easytouse instrument to identify predictors of shortterm (30/60day) mortality after an exacerbation of chronic obstructive pulmonary disease (eCOPD) could help clinicians choose specific measures ... 
A modeling framework for optimizing the flowlevel scheduling with timevarying channels
(Performance Evaluation, 20101231)We introduce a comprehensive modeling framework for the problem of scheduling a finite number of finitelength jobs where the available service rate is timevarying. The main motivation comes from wireless data networks ... 
A nearlyoptimal index rule for scheduling of users with abandonment
(Proceedings  IEEE INFOCOM, 20111231)We analyze a comprehensive model for multiclass job scheduling accounting for user abandonment, with the objective of minimizing the total discounted or timeaverage sum of linear holding costs and abandonment penalties. ... 
Acute toxicity, bioaccumulation and effects of dietary 1 transfer of silver from brine 2 shrimps exposed to PVP/PEIcoated silver nanoparticles to zebrafish
(Comparative Biochemistry and Physiology  part C: Toxicology & Pharmacology, 20170318)The extensive use and release to the aquatic environment of silver nanoparticles (NPs) could lead to their incorporation into the food web. Brine shrimp larvae of 24 h showed low sensitivity to the exposure to PVP/PEIcoated ... 
Aggregated outputs by linear models: An application on marine litter beaching prediction
(Information Sciences, 20190101)In regression, a predictive model which is able to anticipate the output of a new case is learnt from a set of previous examples. The output or response value of these examples used for model training is known. When learning ... 
An empirical study on collective intelligence algorithms for video games problemsolving
(Computing and Informatics, 20151231)Computational intelligence (CI), such as evolutionary computation or swarm intelligence methods, is a set of bioinspired algorithms that have been widely used to solve problems in areas like planning, scheduling or ... 
Analysis of a hybrid Genetic Simulated Annealing strategy applied in multiobjective optimization of orbital maneuvers
(IEEE Aerospace and Electronic Systems Magazine, 20170327)Optimization of orbital maneuvers is one of the main issues in conceptual and preliminary design of spacecraft in different space missions. The main issue in optimization of highthrust orbit transfers is that the common ... 
Are the artificially generated instances uniform in terms of difficulty?
(IEEE Congress on Evolutionary Computation, 201806)In the field of evolutionary computation, it is usual to generate artificial benchmarks of instances that are used as a testbed to determine the performance of the algorithms at hand. In this context, a recent work on ... 
Asymptotically optimal parallel resource assignment with interference
(Queueing Systems, 20101231)Motivated by scheduling in cellular wireless networks and resource allocation in computer systems, we study a service facility with two classes of users having heterogeneous service requirement distributions. The aggregate ... 
Bayesian inference for algorithm ranking analysis
(GECCO 2018 Companion  Proceedings of the 2018 Genetic and Evolutionary Computation Conference Companion 6 July 2018, Pages 324325, 20180830)The statistical assessment of the empirical comparison of algorithms is an essential step in heuristic optimization. Classically, researchers have relied on the use of statistical tests. However, recently, concerns about ... 
Bayesian nonparametric inference for the covariateadjusted ROC curve
(20180530)Accurate diagnosis of disease is of fundamental importance in clinical practice and medical research. Before a medical diagnostic test is routinely used in practice, its ability to distinguish between diseased and nondiseased ... 
A betabinomial mixedeffects model approach for analysing longitudinal discrete and bounded outcomes
(Biometrical Journal, 201805)Patientreported outcomes (PROs) are currently being increasingly used as primary outcome measures in observational and experimental studies since they inform clinicians and researchers about the healthstatus of patients ... 
Bootstrapbased procedures for inference in nonparametric receiveroperating characteristic curve regression analysis
(Statistical Methods in Medical Research, 2017)Prior to using a diagnostic test in a routine clinical setting, the rigorous evaluation of its diagnostic accuracy is essential. The receiveroperating characteristic curve is the measure of accuracy most widely used for ... 
Bootstrapbased procedures for inference in nonparametric ROC regression analysis
(20160630)Before the use of a diagnostic test in a routine clinical setting, the rigorous evaluation of its diagnostic accuracy is an essential step. The receiver operating characteristic (ROC) curve is the measure of accuracy most ... 
Calibration Model Maintenance in Melamine Resin Production: Integrating Drift Detection, Smart Sample Selection and Model Adaptation
(Analytica Chimica Acta, 2018)The physicochemical properties of Melamine Formaldehyde (MF) based thermosets are largely influenced by the degree of polymerization (DP) in the underlying resin. Online supervision of the turbidity point by means of ... 
Cancer incidence among children and young adults who have undergone xray guided cardiac catheterization procedures
(European Journal of Epidemiology, 20180118)Children and young adults with heart disease appear to be at increased risk of developing cancer, although the reasons for this are unclear. A cohort of 11,270 individuals, who underwent cardiac catheterizations while aged ... 
CCN interest forwarding strategy as MultiArmed Bandit model with delays
(NetGCoop 2012  6th International Conference on Network Games, Control and Optimization, 20121231)We consider Content Centric Network (CCN) interest forwarding problem as a MultiArmed Bandit (MAB) problem with delays. We investigate the transient behaviour of the εgreedy, tuned εgreedy and Upper Confidence Bound ... 
Chronic obstructive pulmonary disease subtypes. transitions over time
(PLoS ONE, 20161030)Background Although subtypes of chronic obstructive pulmonary disease are recognized, it is unknown what happens to these subtypes over time. Our objectives were to assess the stability of clusterbased subtypes in patients ... 
Closed queueing networks under congestion: Nonbottleneck independence and bottleneck convergence
(Mathematics of Operations Research, 20131231)We analyze the behavior of closed multiclass productform queueing networks when the number of customers grows to infinity and remains proportionate on each route (or class). First, we focus on the stationary behavior and ... 
Combining statistical techniques to predict postsurgical risk of 1year mortality for patients with colon cancer
(Clinical Epidemiology, 20180306)Introduction: Colorectal cancer is one of the most frequently diagnosed malignancies and a common cause of cancerrelated mortality. The aim of this study was to develop and validate a clinical predictive model for1year ...