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1. Multiscale supervised classification of point clouds with urban and forest applications: (Publication); We analyze the utility of multiscale supervised classification algorithms for object detection and extraction from laser scanning or photogrammetric point clouds. Only the geometric information (the point ...; Created on 22 November 2019
2. Adjusting for bias introduced by instrumental variable estimation in the Cox proportional hazards model: (Publication); Instrumental variable (IV) methods are widely used for estimating average treatment effects in the presence of unmeasured confounders. However, the capability of existing IV procedures, and most notably ...; Created on 25 September 2019
3. Plug-in marginal estimation under a general regression model with missing responses and covariates: (Publication); In this paper, we consider a general regression model where missing data occur in the response and in the covariates. Our aim is to estimate the marginal distribution function and a marginal functional, ...; Created on 24 September 2019
4. Goodness-of-fit tests for quantile regression with missing responses: (Publication); Goodness–of–fit tests for quantile regression models, in the presence of missing observations in the response variable, are introduced and analyzed in this paper. The different proposals are based on the ...; Created on 19 September 2019
5. A method for determining groups in multiple survival curves: (Publication); Survival analysis includes a wide variety of methods for analyzing time‐to‐event data. One basic but important goal in survival analysis is the comparison of survival curves between groups. Several nonparametric ...; Created on 23 August 2019
6. Longevity defined as top 10% survivors and beyond is transmitted as a quantitative genetic trait: (Publication); Survival to extreme ages clusters within families. However, identifying genetic loci conferring longevity and low morbidity in such longevous families is challenging. There is debate concerning the survival ...; Created on 23 August 2019
7. Adverse Events After Atherectomy: Analyzing Long‐Term Outcomes of Endovascular Lower Extremity Revascularization Techniques: (Publication); Background The long-term effectiveness of atherectomy treatment for peripheral arterial disease is unknown. We studied 5-year clinical outcomes by endovascular treatment type among patients with peripheral ...; Created on 22 August 2019
8. Improving the biomarker diagnostic capacity via functional transformations: (Publication); The use of the area under the receiver-operating characteristic, ROC, curve (AUC) as an index of diagnostic accuracy is overwhelming in fields such as biomedical science and machine learning. It seems ...; Created on 22 August 2019
9. An instrumental variable procedure for estimating Cox models with non‐proportional hazards in the presence of unmeasured confounding: (Publication); Two‐stage instrumental variable methods are commonly used for estimating average causal effects in the presence of an unmeasured confounder. In the context of the proportional hazard Cox regression models, ...; Created on 22 August 2019
10. External Validation and Recalculation of the CODEX Index in COPD Patients. A 3CIAplus Cohort Study: (Publication); The CODEX index was developed and validated in patients hospitalized for COPD exacerbation to predict the risk of death and readmission within one year after discharge. Our study aimed to validate the ...; Created on 22 August 2019
11. A new semantic-based feature selection method for spam filtering: (Publication); The Internet emerged as a powerful infrastructure for the worldwide communication and interaction of people. Some unethical uses of this technology (for instance spam or viruses) generated challenges in ...; Created on 15 January 2019
12. A hybrid ARIMA–SVM model for the study of the remaining useful life of aircraft engines: (Publication); In this research, an algorithm is presented for predicting the remaining useful life (RUL) of aircraft engines from a set of predictor variables measured by several sensors located in the engine. RUL prediction ...; Created on 10 October 2018
13. A quantile regression model for bounded responses based on the exponential-geometric distribution: (Publication); The paper first introduces a new two-parameter continuous probability distribution with bounded support from the extended exponential-geometric distribution. Closed- form expressions are given for the ...; Created on 09 October 2018
14. Estimation of the finite population distribution function using a global Estimation of the finite population distribution function using a global penalized calibration method: (Publication); Auxiliary information x is commonly used in survey sampling at the estimation stage. We propose an estimator of the finite population distribution function Fy(t) when x is available for all units in ...; Created on 09 October 2018
15. Bootstrap-based testing approaches for the assessment of the diagnostic accuracy of biomarkers subject to a limit of detection: (Publication); Assessment of the diagnostic accuracy of biomarkers through receiver operating characteristic curve analysis frequently involves a limit of detection imposed by the laboratory analytical system precision. ...; Created on 09 October 2018
16. Percentile curves and reference values for 2000-m rowing ergometer performance time in international rowers aged 14-70 years: (Publication); The aim of this study was to provide percentile curves and reference values for the performance in 2000-m maximal effort on rowing ergometer. A cross-sectional study was carried out with a non-probabilistic ...; Created on 11 October 2018
17. Injury prediction in aerobic gymnastics based on anthropometric variables: (Publication); Objective Use logistic regression to determine a mathematical model which is able to predict injuries in aerobic gymnastics (AG) athletes, according to certain anthropometric characteristics. Subjects ...; Created on 11 October 2018
18. nsROC: An R package for non-standard ROC curve analysis: (Publication); The receiver operating characteristic (ROC) curve is a graphical method which has become standard in the analysis of diagnostic markers, that is, in the study of the classiﬁcation ability of a numerical ...; Created on 10 October 2018
19. Sequential double cross-validation for assessment of added predictive ability in high-dimensional OMIC applications: (Publication); Enriching existing predictive models with new biomolecular markers is an important task in the new multi-omic era. Clinical studies increasingly include new sets of omic measurements which may prove their ...; Created on 03 October 2018
20. Penalized empirical likelihood for quantile regression with missing covariates and auxiliary information: (Publication); ... time, the asymptotic normality of the maximum EL and PEL estimators of the parameter is established. Also, the variable selection of the model in the presence and absence of auxiliary information, respectively, ...; Created on 01 October 2018
21. Survival analysis with delayed entry in selected families with application to human longevity: (Publication); In the field of aging research, family-based sampling study designs are commonly used to study the lifespans of long-lived family members. However, the specific sampling procedure should be carefully taken ...; Created on 22 May 2018
22. Improving stability of prediction models based on correlated omics data by using network approaches: (Publication); ... by using group-based variable selection or group-specific penalization. We compare the performance of our new approaches with standard regularized regression via simulations. Based on these results we ...; Created on 22 May 2018
23. Smooth time-dependent receiver operating characteristic curve estimators: (Publication); The receiver operating characteristic curve is a popular graphical method often used to study the diagnostic capacity of continuous (bio)markers. When the considered outcome is a time-dependent variable, ...; Created on 22 May 2018
24. An extension of Feller's strong law of large numbers: (Publication); This paper presents a general result that allows for establishing a link between the Kolmogorov-Marcinkiewicz-Zygmund strong law of large numbers and Feller's strong law of large numbers in a Banach space ...; Created on 22 May 2018
25. On the estimation of the characteristic function in finite populations with applications: (Publication); This paper studies the estimation of the characteristic function of a finite population. Specifically, the weak convergence of the finite population empirical characteristic process is studied. Under suitable ...; Created on 14 May 2018
26. Placing joint orders when holding costs are negligible and shortages are not allowed: (Publication); In this paper we analyse multi-agent inventory systems where each agent has a deterministic demand and a capacitated warehouse with constant holding costs. Additionally, shortages are not allowed, the ...; Created on 16 February 2018
27. Quantile regression for partially linear varying-coefficient model with censoring indicators missing at random: (Publication); ... the variable selection of the covariates in the linear part by adopting adaptive LASSO penalty. Under appropriate assumptions, the asymptotic normality of the proposed estimators is established, and the ...; Created on 24 January 2018
28. A weighted estimator of conditional hazard rate with left-truncated and dependent data: (Publication); Based on empirical likelihood method, we construct new weighted estimators of conditional density and conditional survival functions when the interest random variable is subject to random left-truncation; ...; Created on 24 January 2018
29. Determining optimum wavelengths for leaf water content estimation from reflectance: A distance correlation approach: (Publication); ... kernel smoothing for variable selection in functional data and a wavelet-based weighted LASSO functional linear regression. Our approach proved to have some advantages over these two testing approaches, ...; Created on 24 January 2018
30. Sample Size Impact on the Categorisation of Continuous Variables in Clinical Prediction: (Publication); Recent advances in information technologies are generating a growth in the amount of available biomedical data. In this paper, we studied the impact sample size may have on the categorisation of a continuous ...; Created on 10 October 2018
31. Sample Size Impact on the Categorisation of Continuous Variables in Clinical Prediction: (Publication); Recent advances in information technologies are generating a growth in the amount of available biomedical data. In this paper, we studied the impact sample size may have on the categorisation of a continuous ...; Created on 10 October 2018
32. Adjusting for bias introduced by instrumental variable estimation in the Cox proportional hazards model: (Publication); Instrumental variable (IV) methods are widely used for estimating average treatment effects in the presence of unmeasured confounders. However, the capability of existing IV procedures, and most notably ...; Created on 10 October 2018
33. A new approach to categorising continuous variables in prediction models: Proposal and validation: (Publication); When developing prediction models for application in clinical practice, health practitioners usually categorise clinical variables that are continuous in nature. Although categorisation is not regarded ...; Created on 22 May 2018
34. Hypothesis test on response mean with inequality constraints under data missing when covariables are present: (Publication); This paper addresses the problem of hypothesis test on response mean with various inequality constraints in the presence of covariates when response data are missing at random. The various hypotheses include ...; Created on 22 May 2018
35. Copula-graphic estimation with left-truncated and right-censored data: (Publication); In Survival Analysis and related fields of research right-censored and left-truncated data often appear. Usually, it is assumed that the right-censoring variable is independent of the lifetime of ultimate ...; Created on 23 January 2018
36. Comparison of two discrimination indexes in the categorisation of continuous predictors in time-to-event studies: (Publication); The Cox proportionalhazards model is the most widely used survival predictionmodel for analysing time-to-event data. To measure the discrimination ability of a survival model the concordance probability ...; Created on 18 September 2017
37. Modelling spatial trends in sorghum breeding field trials using a two-dimensional P-spline mixed model: (Publication); Adjustment for spatial trends in plant breeding field trials is essential for efficient evaluation and selection of genotypes. Current mixed model methods of spatial analysis are based on a multi-step ...; Created on 18 September 2017
38. Sample size impact on the categorisation of continuous variables in clinical predictions: (Publication); Recent advances in information technologies are generating a growth in the amount of available biomedical data. In this paper, we studied the impact sample size may have on the categorisation of a continuous ...; Created on 18 September 2017
39. npregfast: an R package for nonparametric estimation and inference in life sciences: (Publication); We present the R npregfast package via some applications involved with the study of living organisms. The package implements nonparametric estimation procedures in regression models with or without factor-by-curve ...; Created on 18 September 2017
40. Minimum distance estimators for count data based on the probability generating function with applications: (Publication); This paper studies properties of parameter estimators obtained by minimizing a distance between the empirical probability generating function and the probability generating function of a model for count ...; Created on 18 September 2017
41. Survival analysis with delayed entry in selected families with application to human longevity: (Publication); In the field of aging research, family-based sampling study designs are commonly used to study the lifespans of long-lived family members. However, the specific sampling procedure should be carefully taken ...; Created on 18 September 2017
42. FWDselect: An R Package for <span class="highlight">Variable Selection</span> in Regression Models ...: (Publication); In multiple regression models, when there are a large number (p) of explanatory variables which may or may not be relevant for predicting the response, it is useful to be able to reduce the model. To this ...; Created on 08 September 2017
43. Penalized empirical likelihood for high-dimensional partially linear varying coefficient model with measurement errors: (Publication); ... estimation and variable selection of the model are investigated, the proposed PEL estimators are shown to possess the oracle property. Also, we introduce the PEL ratio statistic to test a linear hypothesis ...; Created on 08 September 2017
44. A note on the Log-Lindley distribution: (Publication); The Log-Lindley distribution is a continuous probability model with useful applications in insurance and inventory management. In this note, it is proven that pseudo-random data from this model can be ...; Created on 18 January 2017
45. Surveillance after cardiac arrest in patients with Brugada syndrome without an implantable defibrillator: An alarm effect of the previous syncope: (Publication); Background: Debate regarding the prognosis of asymptomatic patients with Brugada syndrome (BrS) is possibly affected by the selection bias of survivors of sudden cardiac arrest (SCA). We aimed to determine ...; Created on 07 November 2016
46. Cumulative/dynamic ROC curve estimation: (Publication); Receiver operating-characteristic (ROC) curve is a popular graphical method frequently used in order to study the diagnostic capacity of continuous (bio)markers. When the considered outcome is a time-dependent ...; Created on 04 November 2016
47. Fourier methods for model selection: (Publication); A test approach to the model selection problem based on characteristic functions (CFs) is proposed. The scheme is close to that proposed by Vuong (Econometrica 57:257–306, 1989), which is based on comparing ...; Created on 04 November 2016
48. Spawning habitat selection by the common cuttlefish Sepia officinalis in the Cíes Islands (Northwest Spain): (Publication); We evaluated specific habitat features (bottom substrate type, depth, temperature, season and latitude-longitude) at random locations in the Cíes Islands (Galician Atlantic Islands National Park, Northwest ...; Created on 04 November 2016
49. Model checks for nonparametric regression with missing data: a comparative study: (Publication); This paper analyses the behaviour of the goodness-of-fit tests for regression models. To this end, it uses statistics based on an estimation of the integrated regression function with missing observations ...; Created on 04 November 2016
50. Power, FDR and conservativeness of BB-SGoF method: (Publication); Beta-binomial sequential goodness-of-fit (or BB-SGoF) method for multiple testing has been recently proposed as a suitable modification of the sequential goodness-of-fit (SGoF) multiple testingmethod ...; Created on 01 September 2017