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Study of the Preprocessing Influence in the Accuracy of Semi-automated Shadow Detection Approach

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通讯和计算机（中英文版） 2013年第10期10卷 1321-1328页

作者： Samara Calcado de Azevedo Aylton Pagamisse guilherme pina cardim Erivaldo Antonio da Silva Cartography Department Faculty of Science and Technology Univ. Estadual Paulista Sao Paulo 19060 900 Brazil Computer Science Department Faculty of Science and Technology Univ. Estadual Paul&ta Sao Paulo 19060 900 Brazil

Multispectral Image Processing System Developed in CARTOMORPH Software—NDVI Module

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Advances in Remote Sensing 2018年第2期7卷 91-100页

作者： Tiago Oyan Aguiar Samara Calcado de Azevedo Miriam Maria Pedrosa guilherme pina cardim Erivaldo Antonio da Silva Department of Cartography Sao Paulo State University(UNESP)Presidente PrudenteBrazil

In this paper, we have evaluated the multispectral module implemented in the CARTOMORPH software, which is a public domain software under development by the mathematical morphology research group at FCT/UNESP. The aim of CARTOMORPH is to provide an open software with feature extraction methods and a library that contains a variety of implemented code (functions) that can be easily operated by users through graphical interface. The multispectral image processing system has been developed to allow feature discrimination by operations between bands from Remote Sensing images. The normalized difference vegetation index (NDVI) was selected to be implemented on CARTOMORPH because of its acknowledged performance for monitoring of vegetation and cartographic applications. The experiments were applied to multispectral bands from Quick Bird image and the results were compared with those provided by the SPRING and ENVI software. Former is a Brazilian free software, developed by National Institute for Space Research-INPE and dedicated to image processing and Geographic Information Systems (GIS) analysis, as well as ENVI, which is a traditional remote sensing image analysis system. The results prove that the implementation of this module is correct, allowing potential usage in the field of cartography and for environmental applications.

关键词： NDVI CARTOMORPH Quick Bird Remote Sensing

Semiautomatic Algorithm to Extraction of Cartographic Features in Digital Images

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通讯和计算机（中英文版） 2012年第11期9卷 1247-1251页

作者： Erivaldo Antonio da Silva guilherme pina cardim Ruben de Best UNESP - Univ. Estadual Paulista Roberto Simonsen 305 - Presidente Prudente - Sao Paulo - 19060 900 Brazil UNESP - Univ. Estadual Paulista Roberto Simonsen 305 -Presidente Prudente - Sao Paulo - 19060 900 Brazi.

One of the most studied topics in cartography is the extraction of interest cartographic features. Using the image of the cartographic feature extracted, the researchers can provide the update of the cartographic maps, more easily, and study other topics like the area of the cartographic feature. For this reason many automatic routines were created with the intent to perform the extraction of the cartographic features of interest. However, some features can not be found by the algorithm, so the current article aims to show the results with a semiautomatic routine where the user can interact with the algorithm choosing some options and showing some features of the extraction"s goals to help the routine realize the necessary. The results found until now with this algorithm are enough to say that this can be used to realize the cartographic features extraction independent of where it will be used for.

关键词：自动提取算法制图数码影像特征提取研究人员自动程序算法选择半自动

Prevalence and risk factors for acquired long QT syndrome in the emergency department:a retrospective observational study

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World Journal of Emergency Medicine 2023年第6期14卷 454-461页

作者： Diogo de Almeida Fernandes guilherme de Freitas Camoes Diana Ferreira Carolina Queijo Carlos Fontes-Ribeiro Lino Gongalves Rui pina Natalia Antonio Department of Cardiology Coimbra Hospital and University Centre(CHUC)Coimbra 3000-075Portugal Department of Internal Medicine Coimbra Hospital and University Centre(CHUC)Coimbra 3000-075Portugal Faculty of Medicine University of CoimbraCoimbra 3000-370Portugal Institute for Clinical and Biomedical Research Faculty of MedicineUniversity of CoimbraCoimbra 3000-548Portugal

BACKGROUND: Long QT syndrome(LQTS) is a heterogeneous syndrome that may be congenital or, more frequently, acquired. The real-world prevalence of acquired LQTS(aLQTS) in the emergency department(ED) remains to be determined. The aim of this study was to determine prevalence of aLQTS and its impact on symptoms on ED ***: Electrocardiograms(ECG) of 5,056 consecutively patients admitted in the ED of a tertiary hospital between January 28th and March 17th of 2020 were reviewed. All patients with aLQTS were included. Clinical data with a focus on QT prolonging drugs and clinical factors were recorded. Statistical comparison was made between the groups with and without corrected QT(QTc) interval greater than 500 ms(value that is considered severely increased).RESULTS: A total of 383 ECGs with prolonged QTc were recognized, corresponding to a prevalence of aLQTS at admission of 7.82%. Patients with aLQTS were more commonly men(53.3%) with an age of(73.49±14.79) years old and QTc interval of(505.3±32.4) ms. Only 20.4% of these patients with aLQTS were symptomatic. No ventricular arrhythmias were recorded. Patients with QT interval greater than 500 ms were more frequently female(59.5%;P<0.001) and were more frequently on QT prolonging drugs(77.3%;P=0.025). Main contributing factor was intake of antibiotics(odds ratio [OR] 4.680) followed by female gender(OR 2.473) and intake of antipsychotics(OR 1.925).CONCLUSION: aLQTS is particularly prevalent in the ED. Female patients on antibiotics and antipsychotics are at particularly high risk. Efforts must be made to avoid, detect and treat aLQTS as early as possible.

关键词： Long QT syndrome Epidemiology Drug interactions Emergency department