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Carvalho K, Vicente JP, Jakovljevic M, Teixeira JPR. Analysis and Forecasting Incidence, Intensive Care Unit Admissions, and Projected Mortality Attributable to COVID-19 in Portugal, the UK, Germany, Italy, and France: Predictions for 4 Weeks Ahead. Bioengineering (Basel) 2021. [PMID: 34208000 DOI: 10.20944/preprints202105.0116.v1)] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 04/18/2023]
Abstract
The use of artificial neural networks (ANNs) is a great contribution to medical studies since the application of forecasting concepts allows for the analysis of future diseases propagation. In this context, this paper presents a study of the new coronavirus SARS-COV-2 with a focus on verifying the virus propagation associated with mitigation procedures and massive vaccination campaigns. There were two proposed methodologies in making predictions 28 days ahead for the number of new cases, deaths, and ICU patients of five European countries: Portugal, France, Italy, the United Kingdom, and Germany. A case study of the results of massive immunization in Israel was also considered. The data input of cases, deaths, and daily ICU patients was normalized to reduce discrepant numbers due to the countries' size and the cumulative vaccination values by the percentage of population immunized (with at least one dose of the vaccine). As a comparative criterion, the calculation of the mean absolute error (MAE) of all predictions presents the best methodology, targeting other possibilities of use for the method proposed. The best architecture achieved a general MAE for the 1-to-28-day ahead forecast, which is lower than 30 cases, 0.6 deaths, and 2.5 ICU patients per million people.
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Affiliation(s)
- Kathleen Carvalho
- Research Centre in Digitalization and Intelligent Robotics (CeDRI)-Instituto Politecnico de Braganca, 5300-253 Bragança, Portugal
- Campus Cornélio Procópio, Federal Technological University of Paraná, Paraná 86300-000, Brazil
| | - João Paulo Vicente
- Research Centre in Digitalization and Intelligent Robotics (CeDRI)-Instituto Politecnico de Braganca, 5300-253 Bragança, Portugal
- Campus Cornélio Procópio, Federal Technological University of Paraná, Paraná 86300-000, Brazil
| | - Mihajlo Jakovljevic
- Department of Global Health Economics and Policy, Faculty of Medical Sciences, University of Kragujevac, 34000 Kragujevac, Serbia
- Institute of Comparative Economic Studies, Hosei University, Tokyo 102-8160, Japan
| | - João Paulo Ramos Teixeira
- Research Centre in Digitalization and Intelligent Robotics (CeDRI)-Instituto Politecnico de Braganca, 5300-253 Bragança, Portugal
- Applied Management Research Unit (UNIAG), Instituto Politecnico de Braganca, 5300-253 Bragança, Portugal
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Carvalho K, Vicente JP, Jakovljevic M, Teixeira JPR. Analysis and Forecasting Incidence, Intensive Care Unit Admissions, and Projected Mortality Attributable to COVID-19 in Portugal, the UK, Germany, Italy, and France: Predictions for 4 Weeks Ahead. Bioengineering (Basel) 2021; 8:bioengineering8060084. [PMID: 34208000 PMCID: PMC8230711 DOI: 10.3390/bioengineering8060084] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 06/04/2021] [Accepted: 06/07/2021] [Indexed: 11/16/2022] Open
Abstract
The use of artificial neural networks (ANNs) is a great contribution to medical studies since the application of forecasting concepts allows for the analysis of future diseases propagation. In this context, this paper presents a study of the new coronavirus SARS-COV-2 with a focus on verifying the virus propagation associated with mitigation procedures and massive vaccination campaigns. There were two proposed methodologies in making predictions 28 days ahead for the number of new cases, deaths, and ICU patients of five European countries: Portugal, France, Italy, the United Kingdom, and Germany. A case study of the results of massive immunization in Israel was also considered. The data input of cases, deaths, and daily ICU patients was normalized to reduce discrepant numbers due to the countries' size and the cumulative vaccination values by the percentage of population immunized (with at least one dose of the vaccine). As a comparative criterion, the calculation of the mean absolute error (MAE) of all predictions presents the best methodology, targeting other possibilities of use for the method proposed. The best architecture achieved a general MAE for the 1-to-28-day ahead forecast, which is lower than 30 cases, 0.6 deaths, and 2.5 ICU patients per million people.
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Affiliation(s)
- Kathleen Carvalho
- Research Centre in Digitalization and Intelligent Robotics (CeDRI)—Instituto Politecnico de Braganca, 5300-253 Bragança, Portugal; (K.C.); (J.P.V.)
- Campus Cornélio Procópio, Federal Technological University of Paraná, Paraná 86300-000, Brazil
| | - João Paulo Vicente
- Research Centre in Digitalization and Intelligent Robotics (CeDRI)—Instituto Politecnico de Braganca, 5300-253 Bragança, Portugal; (K.C.); (J.P.V.)
- Campus Cornélio Procópio, Federal Technological University of Paraná, Paraná 86300-000, Brazil
| | - Mihajlo Jakovljevic
- Department of Global Health Economics and Policy, Faculty of Medical Sciences, University of Kragujevac, 34000 Kragujevac, Serbia;
- Institute of Comparative Economic Studies, Hosei University, Tokyo 102-8160, Japan
| | - João Paulo Ramos Teixeira
- Research Centre in Digitalization and Intelligent Robotics (CeDRI)—Instituto Politecnico de Braganca, 5300-253 Bragança, Portugal; (K.C.); (J.P.V.)
- Applied Management Research Unit (UNIAG), Instituto Politecnico de Braganca, 5300-253 Bragança, Portugal
- Correspondence:
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Caorsi V, Lemière J, Campillo C, Bussonnier M, Manzi J, Betz T, Plastino J, Carvalho K, Sykes C. Cell-sized liposome doublets reveal active tension build-up driven by acto-myosin dynamics. Soft Matter 2016; 12:6223-6231. [PMID: 27378156 DOI: 10.1039/c6sm00856a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Cells modulate their shape to fulfill specific functions, mediated by the cell cortex, a thin actin shell bound to the plasma membrane. Myosin motor activity, together with actin dynamics, contributes to cortical tension. Here, we examine the individual contributions of actin polymerization and myosin activity to tension increase with a non-invasive method. Cell-sized liposome doublets are covered with either a stabilized actin cortex of preformed actin filaments, or a dynamic branched actin network polymerizing at the membrane. The addition of myosin II minifilaments in both cases triggers a change in doublet shape that is unambiguously related to a tension increase. Preformed actin filaments allow us to evaluate the effect of myosin alone while, with dynamic actin cortices, we examine the synergy of actin polymerization and myosin motors in driving shape changes. Our assay paves the way for a quantification of tension changes triggered by various actin-associated proteins in a cell-sized system.
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Affiliation(s)
- V Caorsi
- Laboratoire Physico Chimie Curie, Institut Curie, PSL Research University, CNRS, UMR168, 75005, Paris, France and Sorbonne Universités, UPMC Univ Paris 06, 75005, Paris, France
| | - J Lemière
- Laboratoire Physico Chimie Curie, Institut Curie, PSL Research University, CNRS, UMR168, 75005, Paris, France and Sorbonne Universités, UPMC Univ Paris 06, 75005, Paris, France and Univ Paris Diderot, Sorbonne Paris Cité, Paris, F-75205, France and Department of Molecular Biophysics and Biochemistry, Nanobiology Institute, Yale University, New Haven, CT, USA
| | - C Campillo
- Université Evry Val d'Essonne, LAMBE, Boulevard F Mitterrand, Evry 91025, France
| | - M Bussonnier
- Laboratoire Physico Chimie Curie, Institut Curie, PSL Research University, CNRS, UMR168, 75005, Paris, France and Sorbonne Universités, UPMC Univ Paris 06, 75005, Paris, France and Univ Paris Diderot, Sorbonne Paris Cité, Paris, F-75205, France
| | - J Manzi
- Laboratoire Physico Chimie Curie, Institut Curie, PSL Research University, CNRS, UMR168, 75005, Paris, France and Sorbonne Universités, UPMC Univ Paris 06, 75005, Paris, France
| | - T Betz
- Laboratoire Physico Chimie Curie, Institut Curie, PSL Research University, CNRS, UMR168, 75005, Paris, France and Sorbonne Universités, UPMC Univ Paris 06, 75005, Paris, France and Institute of Cell Biology, Center for Molecular Biology of Inflammation, Cells-in-Motion Cluster of Excellence, Münster University, Von-Esmarch-Strasse 56, D-48149 Münster, Germany
| | - J Plastino
- Laboratoire Physico Chimie Curie, Institut Curie, PSL Research University, CNRS, UMR168, 75005, Paris, France and Sorbonne Universités, UPMC Univ Paris 06, 75005, Paris, France
| | - K Carvalho
- Laboratoire Physico Chimie Curie, Institut Curie, PSL Research University, CNRS, UMR168, 75005, Paris, France and Sorbonne Universités, UPMC Univ Paris 06, 75005, Paris, France
| | - C Sykes
- Laboratoire Physico Chimie Curie, Institut Curie, PSL Research University, CNRS, UMR168, 75005, Paris, France and Sorbonne Universités, UPMC Univ Paris 06, 75005, Paris, France
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Carvalho K, de Campos MKF, Pereira LFP, Vieira LGE. Reference gene selection for real-time quantitative polymerase chain reaction normalization in "Swingle" citrumelo under drought stress. Anal Biochem 2010; 402:197-9. [PMID: 20363209 DOI: 10.1016/j.ab.2010.03.038] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2010] [Revised: 03/26/2010] [Accepted: 03/30/2010] [Indexed: 11/18/2022]
Abstract
We describe the first systematic evaluation of reference genes for use in real-time quantitative polymerase chain reaction (qPCR) for water deficit stress studies in the citrus rootstock "Swingle" citrumelo. The expression levels of seven reference genes-cyclophilin (CYP), cathepsin (CtP), actin (ACT), glyceraldehyde-3-phosphate dehydrogenase (GAPDH), elongation factor 1alpha (EF1alpha), beta-tubulin (TUB), and ADP ribosylation factor (ADP)-during drought stress were tested using geNorm and NormFinder programs. Results from four experimental conditions indicated that EF1alpha and ADP were the most stable reference genes. Relative expression levels of Delta1-pyrroline-5-carboxylate synthetase (P5CS) was used for reference gene validation.
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Affiliation(s)
- K Carvalho
- Instituto Agronômico do Paraná, Londrina, PR, Brazil
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Calhoun VD, Carvalho K, Astur R, Pearlson GD. Using Virtual Reality to Study Alcohol Intoxication Effects on the Neural Correlates of Simulated Driving. Appl Psychophysiol Biofeedback 2005; 30:285-306. [PMID: 16167192 DOI: 10.1007/s10484-005-6384-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The use of virtual reality in the form of simulated tasks can provide a realistic environment in which to study complex naturalistic behaviors. Many of the behavioral effects of alcohol intoxication are well known, but there is relatively little imaging evidence examining how alcohol exposure might transiently modulate brain function, especially in the context of task performance. In this review, we provide a brief synopsis of previous work using functional magnetic resonance imaging (fMRI) to study the neural correlates of alcohol intoxication. We describe in detail two studies from our published work, the first involving a visual perception paradigm, and the second involving virtual reality through a naturalistic behavior; simulated driving. Participants received single-blind individualized doses of beverage alcohol designed to produce blood alcohol content (BAC) of 0.04 and 0.08 or placebo. Subjects were fMRI scanned after training to asymptote performance. In both studies we found specific circuits that were differentially modulated by alcohol, we revealed both global and local effects of alcohol, and we examined relationships between behavior, brain function, and alcohol blood levels.
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Affiliation(s)
- V D Calhoun
- Olin Neuropsychiatry Research Center, Institute of Living, 200 Retreat Ave., Hartford, Connecticut 06106, USA.
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Dreyer G, Figueredo-Silva J, Carvalho K, Amaral F, Ottesen EA. Lymphatic filariasis in children: adenopathy and its evolution in two young girls. Am J Trop Med Hyg 2001; 65:204-7. [PMID: 11561705 DOI: 10.4269/ajtmh.2001.65.204] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Lymphatic filariasis is a widespread infectious disease of children in endemic areas, but little is known about the early lymphatic damage in children and its evolution, either with or without treatment. Two girls (ages 6 and 12 years) from a Wuchereria bancrofti endemic region of Brazil presented with chronic inguinal adenopathy. Neither had microfilaremia. By ultrasound both were shown to have living adult worms in their enlarged inguinal nodes and had occult local lymphatic damage (lymphangiectasis). One girl spontaneously developed acute adenitis in the affected node prior to any intervention; this adenitis resolved within 10 days and was associated with the progressive disappearance over 45-90 days of all local abnormalities detectable by ultrasound. In the other child, after treatment with a single dose of diethylcarbamazine (DEC), the same clinical picture of transient adenitis and resolving abnormalities (detectable by ultrasound) occurred. These findings demonstrated filariasis as the cause of adenopathy in children, and also both spontaneous and treatment-induced worm-death, with subsequent reversal of lymphatic abnormalities.
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Affiliation(s)
- G Dreyer
- Núcleo de Ensino Pesquisa e Assistência em Filariose, Hospital das Clínicas, Universidade Federal de Pernambuco, Recife, Brazil.
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