Orietta Nicolis

Dr. Orietta Nicolis

Facultad de Ingenieria, Universidad Andres Bello, Viña del, Mar 2520000, Chile
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Research Focus & Metrics

Academic Career Length

19Years (2008-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 April 2021 in Spatial Statistics
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Journal Article
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Orietta NicolisOrietta Nicolis
Orietta Nicolis
FPFrancisco Plaza
Francisco Plaza
RSRodrigo Salas
Rodrigo Salas

9 November 2020 in IEEE Access
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Journal Article
Open access
NENicolas Esquivel
Nicolas Esquivel
Orietta NicolisOrietta Nicolis
Orietta Nicolis
BPBilly Peralta
Billy Peralta
JMJorge Mateu
Jorge Mateu
Crime activity in many cities worldwide causes significant damages to the lives of victims and their surrounding communities. It is a public disorder problem, and big cities experience large amounts of crime events. Spatio-temporal prediction of crimes activity can help the cities to have a better allocation of police resources and surveillance. Deep learning techniques are considered efficient tools to predict future events analyzing the behavior of past ones; however, they are not usually applied to crime event prediction using a spatio-temporal approach. In this paper, a Convolutional Neural Network (CNN) together with a Long-Short Term Memory (LSTM) network (thus CLSTM-NN) are proposed to predict the presence of crime events over the city of Baltimore (USA). In particular, matrices of past crime events are used as input to a CLSTM-NN to predict the presence of at least one event in future days. The model is implemented on two types of events: “street robbery" and “larceny". The proposed procedure is able to take into account spatial and temporal correlations present in the past data to improve future prediction. The prediction performance of the proposed neural network is assessed under a number of controlled plausible scenarios, using some standard metrics (Accuracy, AUC-ROC, and AUC-PR).

18 April 2024 in Frontiers in Oncology
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Journal Article
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Orietta NicolisOrietta Nicolis
Orietta Nicolis
DADenisse De Los Angeles
Denisse De Los Angeles
CTCarla Taramasco
Carla Taramasco
Background: Breast cancer continues to be a significant global health issue, necessitating advancements in prevention and early detection strategies. This review aims to assess and synthesize research conducted from 2020 to the present, focusing on breast cancer risk factors, including genetic, lifestyle, and environmental aspects, as well as the innovative role of artificial intelligence (AI) in prediction and diagnostics.Methods: A comprehensive literature search, covering studies from 2020 to the present, was conducted to evaluate the diversity of breast cancer risk factors and the latest advances in Artificial Intelligence (AI) in this field. The review prioritized high-quality peer-reviewed research articles and meta-analyses.Results: Our analysis reveals a complex interplay of genetic, lifestyle, and environmental risk factors for breast cancer, with significant variability across different populations. Furthermore, AI has emerged as a promising tool in enhancing the accuracy of breast cancer risk prediction and the personalization of prevention strategies.Conclusion: The review highlights the necessity for personalized breast cancer prevention and detection approaches that account for individual risk factor profiles. It underscores the potential of AI to revolutionize these strategies, offering clear recommendations for future research directions and clinical practice improvements.

1 November 2015 in Spatial Statistics
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Journal Article
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Orietta NicolisOrietta Nicolis
Orietta Nicolis
Marcello ChiodiMarcello Chiodi
Marcello Chiodi
Giada AdelfioGiada Adelfio
Giada Adelfio

7 February 2020 in Entropy
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Journal Article
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Orietta NicolisOrietta Nicolis
Orietta Nicolis
JMJorge Mateu
Jorge Mateu
Javier Contreras-ReyesJavier Contreras-Reyes
Javier Contreras-Reyes
The aim of this work was to extend the results of Perez et al. (Physica A (2006), 365 (2), 282–288) to the two-dimensional (2D) fractional Brownian field. In particular, we defined Shannon entropy using the wavelet spectrum from which the Hurst exponent is estimated by the regression of the logarithm of the square coefficients over the levels of resolutions. Using the same methodology. we also defined two other entropies in 2D: Tsallis and the Rényi entropies. A simulation study was performed for showing the ability of the method to characterize 2D (in this case, α = 2 ) self-similar processes.

27 February 2024 in Environmental and Ecological Statistics
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Journal Article
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Orietta NicolisOrietta Nicolis
Orietta Nicolis
LDLuis Delgado
Luis Delgado
BPBilly Peralta
Billy Peralta
Mailiu Díaz PeñaMailiu Díaz Peña
Mailiu Díaz Peña
Marcello ChiodiMarcello Chiodi
Marcello Chiodi