A5013254368- Ionosphere and magnetosphere dynamics
- Retinal Imaging and Analysis
- Glaucoma and retinal disorders
- Solar Thermal and Photovoltaic Systems
- Earthquake Detection and Analysis
- Retinal Diseases and Treatments
- Photovoltaic System Optimization Techniques
- Geomagnetism and Paleomagnetism Studies
- Digital Imaging for Blood Diseases
- GNSS positioning and interference
- Smart Grid Energy Management
- Atmospheric Ozone and Climate
- Mathematical and Theoretical Analysis
- Medical Imaging Techniques and Applications
- Solar and Space Plasma Dynamics
- Fault Detection and Control Systems
- Spectroscopy and Chemometric Analyses
- Mathematics and Applications
- Solar Radiation and Photovoltaics
- Cardiac Valve Diseases and Treatments
- Smart Agriculture and AI
- Medical Imaging and Pathology Studies
- Astro and Planetary Science
- Control Systems and Identification
- Intraperitoneal and Appendiceal Malignancies
Universidad de Huelva
2013-2022
Schön Klinik Vogtareuth
2011-2018
Duke Medical Center
2016
Ferrovial (United Kingdom)
2009
Sapienza University of Rome
2008
Instituto Nacional de Técnica Aeroespacial
1999-2002
This paper presents a new supervised method for blood vessel detection in digital retinal images. uses neural network (NN) scheme pixel classification and computes 7-D vector composed of gray-level moment invariants-based features representation. The was evaluated on the publicly available DRIVE STARE databases, widely used this purpose, since they contain images where vascular structure has been precisely marked by experts. Method performance both sets test is better than other existing...
Optic disc (OD) detection is an important step in developing systems for automated diagnosis of various serious ophthalmic pathologies. This paper presents a new template-based methodology segmenting the OD from digital retinal images. uses morphological and edge techniques followed by Circular Hough Transform to obtain circular boundary approximation. It requires pixel located within as initial information. For this purpose, location based on voting-type algorithm also proposed. The...
Retinal blood vessel assessment plays an important role in the diagnosis of ophthalmic pathologies. The use digital images for this purpose enables application a computerized approach and has fostered development multiple methods automated vascular tree segmentation. Metrics based on contingency tables binary classification have been widely used evaluating performance these algorithms. from family are measurement success or failure rate detected pixels, obtained by means pixel-to-pixel...
Abstract. Further development of the method proposed by Danilov and Mikhailov is presented. The applied to reveal foF2 long-term trends on 30 Northern Hemisphere ionosonde stations. Most them show significant trends. A pronounced dependence trend magnitude geomagnetic (invariant) latitude confirmed. Periods negative/positive corresponding periods increasing/decreasing activity are revealed for first time. Pronounced diurnal variations found. Strong positive in post-midnight-early-morning LT...
Abstract. Earlier revealed morphological features of the foF2 and hmF2 long-term trends are interpreted in scope geomagnetic control concept based on contemporary F2-layer storm mechanisms. The parameter strongly depend varying activity whose effects cannot be removed from using conventional indices activity. Therefore, any interpretation should consider as an inalienable part trend analysis. Periods with negative positive correspond to periods increasing or decreasing turning points around...
Abstract The diagnosis of Crohn’s disease (CD) in the small bowel is generally performed by observing a very large number images captured capsule endoscopy (CE). This diagnostic technique entails heavy workload for specialists terms time spent reviewing images. paper presents convolutional neural network capable classifying CE to identify those ones affected lesions indicative disease. architecture proposed was custom designed solve this image classification problem. allowed different design...
Abstract. The method earlier used for the foF2 long-term trends analysis is applied to reveal hmF2 at 27 ionosonde stations in European and Asian longitudinal sectors. Observed M(3000)F2 data last 3 solar cycles are derive trends. majority of studied show significant linear with a confidence level least 95% period after 1965, most these being positive. No systematic variation trend magnitude latitude revealed, but some effect does take place. proposed geomagnetic storm concept explain...
In the frame of European COST 296 project (Mitigation Ionospheric Effects on Radio Systems, MIERS) in Working Package 1.3, new ionospheric models, prediction and forecasting methods programs as well imaging techniques have been developed. They include (i) topside ionosphere meso-scale irregularity (ii) improved for real time foF2, M(3000)F2, MUF TECs, including use such Neurofuzzy, Nearest Neighbour, Cascade Modelling Genetic Programming (iii) dynamic high latitude models through tomographic...
Abstract. A new approach to extract foF2 long-term trends, which are free a great extent from solar and geomagnetic activity effects, has been proposed. These trends insensitive the phase (increasing/decreasing) of activity, with variations being small insignificant for such relatively short time periods. but significant residual trend, slope Kr = - 2.2 × 10-4 per year, was obtained over 55-year period (the longest avail-able) observations at Slough. Such have no practical importance. On...
Summary This paper proposes the use of model predictive control (MPC) with binary‐regularization to manage electric power generation problem in concentrating solar plants thermal energy storage. The main advantage MPC formulation is inclusion a block protection method based on term that penalizes variation (also called cycling ) differently according situation, ie, normal operation, startup, or shutdown. distinction simplifies choice schedules reduced and high sale profits. interest this...
Ionosphere monitoring implies: observations, prediction and mapping of ionospheric parameters. A case with one available (El Arenosillo) ionosonde is considered. Some statistical methods for f0F2 short-term (1-24 h in advance) are compared. The analysis multi-dimensional regression Df0F2 (relative deviation from running median) Ap, F10.7 previous observations has shown that inclusion additional terms Ap improves the accuracy lead time more than 15 h. For 1-6 a linear earlier observed...
Expanded polytetrafluoroethylene sutures have been used for the replacement of chordae tendineae since 1985, especially mitral valve prolapse. There are only a few reports artificial to treat tricuspid regurgitation. We report on 72-year-old woman in NYHA class III preoperatively, who underwent successful repair after preoperative echocardiography revealed regurgitation grade IV, caused by prolapse anterior leaflet (A1–A2) and annular dilatation. Tricuspid was performed using chords...