Rui Manuel Farinha das Neves Guerra
Professor auxiliar
Faculdade de Ciências e Tecnologia
Centro de Eletrónica, Optoeletrónica e Telecomunicações
Subsistema
Docentes Universitário
Unidade ID
Centro de Eletrónica, Optoeletrónica e Telecomunicações
Regime
Exclusividade
Vínculo
CT em Funções Públicas por tempo indeterminado
I have completed the PhD in Physics in 1999, Instituto Superior Técnico (University of Lisbon - UL), in the area of plasma physics, obtained the Master's Degree in Particle Physics in 1995 by the Faculty od Sciences at UL and graduated in Physics in 1991 also at UL. I belong to the teaching staff of the Physics Department at the University of Algarve (UAlg) since 1996 and I am currently the coordinator of CEOT (Center for Electronics, Optoeletronics and Telecommunications), also based at UAlg. I am currently engaged in developing a research line in optical diagnostics, with emphasis on light scattering and biological applications. Specifically, I am particularly interested in the application of the concepts of light scattering in turbid media to the non-invasive determination of fruit internal quality parameters. The research has a strong focus in industry applications, since our group is presently collaborating with the industry on a prototype for fruit sorting by internal quality attributes. More recently we have started a line of research for early detection of phyto-pathology symptoms in plant leaves through visible/near infrared spectroscopy. However, my work relies also on fundamental studies on diffuse reflectance spectroscopy, chemometrics, models for light propagation and instrumentation issues, which allowed us to apply these techniques in other fields, such as led illumination in aquaculture, honey characterization and infrared spectroscopy. Complimentary areas are diode laser spectroscopy (experience through the post-doc in Umea) and light scattering in plasmas (Ph.D.)
Atividades
Atividades
2017/10/01 - 2022/09/30. Orientação. Desenvolvimento de um sistema óptico robusto para calibração automática e não destrutiva da qualidade interna de fruta.Ciências Agrárias (Doutoramento). Orientador.
2017/10/01 - 2020/11/30. Orientação. Non-invasive monitoring of kiwifruit ripening.Ciências Agrárias (Doutoramento). Orientador.
2017/10/01 - 2019/04/04. Orientação. Determinação Não Destrutiva da Qualidade Interna de "Ortanique" (Citrus reticulata Blanco x Citrus sinensis (L) Osbeck).Hortofruticultura (Mestrado). Orientador.
2016 - 2016. Orientação. A descoberta do Universo – uma contribuição para o ensino de Física e Química.Ensino de Matemática/Biologia e de Geologia/Física e Química no 3.º Ciclo do Ensino Básico e Ensino Secundário (Mestrado). Coorientador.
2015/09/01 - 2016/01/15. Orientação. Utilização de sensores óticos na deteção de agentes patogénicos nas plantas.Engenharia Biológica (Mestrado). Orientador.
2011/10/01 - 2013/01. Orientação. Development of a data acquisition system for the non - destructive determination of fruit internal quality in an
automated calibration line equipped with a visible/near infrared spectrometer.Engenharia Eletrónica e Telecomunicações (Mestrado). Orientador.
automated calibration line equipped with a visible/near infrared spectrometer.Engenharia Eletrónica e Telecomunicações (Mestrado). Orientador.
Projetos
Projetos
2020/01/01 - 2023/12/31. Centro de Electrónica, Optoelectrónica e Telecomunicações, 6817 - DCRRNI ID. Universidade do Algarve.
2020/01/01 - 2023/12/31. Centro de Electrónica, Optoelectrónica e Telecomunicações, 6817 - DCRRNI ID. Universidade do Algarve.
2018/10/15 - 2021/10/14. NIBAP - Núcleo de Investigação em Biotecnologia e Agricultura de Precisão, Programa Interface. Investigador responsável. Universidade do Algarve Centro de Electronica Optoelectrônica e Telecomunicacoes.
2018/09/01 - 2021/08/31. OtiCalFrut - Calibração Ótica de Frutos (Optical Calibration of Fruits), Programa Interface - projetos em co-promoção. Investigador responsável. Universidade do Algarve Centro de Electronica Optoelectrônica e Telecomunicacoes.
2019/01/01 - 2019/12/31. Centro de Electrónica, Optoelectrónica e Telecomunicações, 6817 - DCRRNI ID. Universidade do Algarve.
2015/01/01 - 2018/12/31. Centro de Electrónica, Optoelectrónica e Telecomunicações, 6817 - DCRRNI ID. Universidade do Algarve.
2017/06/01 - 2018/05/31. Modelo de otimização de fatores biológicos na gestão da Pêra 'Rocha' na pré e pós-colheita (Optimization of biological factors in the management of 'Rocha' pear in pre- and post-harvest), COMPETE 2020. Investigador responsável. Universidade do Algarve Centro de Electronica Optoelectrônica e Telecomunicacoes.
2015/01/01 - 2015/06/30. Desenvolvimento de modelos matemáticos aplicados à determinação óptica de defeitos internos de fruta em calibradores automáticos'' [Development of mathematical models applied to the optical determination of fruit internal defects in automated grading machines], Prestação de serviços. Investigador responsável. Universidade do Algarve Centro de Electronica Optoelectrônica e Telecomunicacoes.
2014/01/01 - 2014/12/31. Projecto Estratégico - UI 631 - 2014, 6817 - DCRRNI ID. Universidade do Algarve.
2011/01/01 - 2013/12/31. Projecto Estratégico - UI 631 - 2011-2012, 6817 - DCRRNI ID. Universidade do Algarve.
2012/12/04 - 2013/12/03. CalBrix - Calibração automática e não destrutiva do o Brix de frutos [CalBrix - automated non-destructive grading of fruit Brix]], QREN - Vale Inovação. Investigador responsável. Universidade do Algarve Centro de Electronica Optoelectrônica e Telecomunicacoes.
2003/01/01 - 2006/12/31. Espectroscopia e imagiologia de tecidos biológicos com luz laser" [Spectroscopy and imagiology of biological tissues with laser light] , POCTI. Investigador responsável. Universidade do Algarve.
2004/04/01 - 2006/03/31. "Espalhamento de luz em meios biológicos túrbidos: uma abordagem fractal" [Light scattering in turbid biological media: a fractal approach], POCTI. Investigador responsável. Universidade do Algarve Centro de Electronica Optoelectrônica e Telecomunicacoes.
2000/03/01 - 2001/02/28. DEVELOPMENT OF DIODE-LASAER-BASED SPECTROSCOPIC MODULATION TECHNIQUES FOR ULTRA-SENSITIVE TRACE SPECIES DETECTION, POCTI.
1993/12/15 - 1996/12/14. Não disponível, POCTI.
Produções
da Silva, M.C.; Pinto, P.I.S.; Guerra, R.; Duarte, A.; Power, D.M.; Marques, N.T.. 2023. "Gene transcripts responsive to drought stress identified in Citrus macrophylla bark tissue transcriptome have a modified response in plants infected by Citrus tristeza virus". Scientia Horticulturae, 307. https://doi.org/10.1016/j.scienta.2022.111526
Rosa Pires; Rui Guerra; Sandra P. Cruz; M. Dulce Antunes; António Brázio; Andreia M. Afonso; Mariana Daniel; et al. 2022. "Ripening assessment of ‘Ortanique’ (Citrus reticulata Blanco x Citrus sinensis (L) Osbeck) on tree by SW-NIR reflectance spectroscopy-based calibration models". Postharvest Biology and Technology, 183: 111750-111750. https://doi.org/10.1016/j.postharvbio.2021.111750
Ana M. Cavaco; Andrei B. Utkin; Jorge Marques da Silva; Rui Guerra. 2022. "Making Sense of Light: The Use of Optical Spectroscopy Techniques in Plant Sciences and Agriculture". Applied Sciences. https://doi.org/10.3390/app12030997
Pedro M. C. Inácio; Rui Guerra; Peter Stallinga. 2022. "An Ultra-Low-Cost RCL-Meter". Sensors, 22 (6): 2227-2227. https://doi.org/10.3390/s22062227
Afonso, A.M.; Antunes, M.D.; Cruz, S.; Cavaco, A.M.; Guerra, R.. 2022. "Non-destructive follow-up of ‘Jintao’ kiwifruit ripening through VIS-NIR spectroscopy – individual vs. average calibration model's predictions". Postharvest Biology and Technology, 188. https://doi.org/10.1016/j.postharvbio.2022.111895
Martins, J.A.; Guerra, R.; Pires, R.; Antunes, M.D.; Panagopoulos, T.; Brázio, A.; Afonso, A.M.; et al. 2022. "SpectraNet–53: A deep residual learning architecture for predicting soluble solids content with VIS–NIR spectroscopy". Computers and Electronics in Agriculture, 197. https://doi.org/10.1016/j.compag.2022.106945
Guerreiro, A.; Gago, C.; Veloso, F.; Freitas, L.; Guerra, R.; Antunes, M.D.. 2022. Evaluation of storage temperature on quality attributes of red-fleshed kiwifruit (Actinidia chinensis var. chinensis). Vol. 1332. https://doi.org/10.17660/ActaHortic.2022.1332.49
Afonso, A.M.; Guerra, R.; Freitas, L.; Veloso, F.; Cavaco, A.M.; Antunes, M.D.. 2022. Ripening evolution of 'Hayward' kiwifruit orchards. Vol. 1332. https://doi.org/10.17660/ActaHortic.2022.1332.50
da Silva, M.C.; Pinto, P.I.S.; Guerra, R.; Duarte, A.; Power, D.M.; Marques, N.T.. 2022. Transcriptome Profiling of Citrus Macrophylla Bark Tissues Under Drought Stress. http://www.scopus.com/inward/record.url?eid=2-s2.0-85126096470&partnerID=MN8TOARS
Cavaco, A.M.; Cruz, S.P.; Antunes, M.D.; Guerra, R.; Pires, R.; Afonso, A.M.; Brázio, A.; et al. 2021. "Spatiotemporal modelling of the quality and ripening of two cultivars of “Algarve Citrus” orchards at different edaphoclimatic conditions". Postharvest Biology and Technology, 172. https://doi.org/10.1016/j.postharvbio.2020.111386
Sandra Cruz; Rui Guerra; António Brazio; Ana M. Cavaco; Dulce Antunes; Dário Passos. 2021. "Nondestructive simultaneous prediction of internal browning disorder and quality attributes in ‘Rocha’ pear (Pyrus communis L.) using VIS-NIR spectroscopy". Postharvest Biology and Technology, 179: 111562-111562. https://doi.org/10.1016/j.postharvbio.2021.111562
Daniel, M.; Guerra, R.; Brázio, A.; Rodrigues, D.; Cavaco, A.M.; Antunes, M.D.; Valente de Oliveira, J.. 2021. "Feature discovery in NIR spectroscopy based Rocha pear classification". Expert Systems with Applications, 177. https://doi.org/10.1016/j.eswa.2021.114949
Guerreiro, A.; Gago, C.; Veloso, F.; Freitas, L.; Guerra, R.; Antunes, M.D.. 2021. Storage temperature effect on kiwiberry (Actinidia arguta ‘Ken’s Red’) shelf-life. Vol. 1327. https://doi.org/10.17660/ActaHortic.2021.1327.74
Dário Passos; Daniela Rodrigues; Ana Cavaco; Maria Antunes; Rui Guerra. 2019. "Non-Destructive Soluble Solids Content Determination for ‘Rocha’ Pear Based on VIS-SWNIR Spectroscopy under ‘Real World’ Sorting Facility Conditions". Sensors, 19 (23): 5165-5165. https://doi.org/10.3390/s19235165
Cavaco, A.M.; Antunes, M.D.; Panagopoulos, T.; Rosendo, M.; Pires, R.; Brázio, A.; Silva, L.; Afonso, A.M.; Guerra, R.. 2018. "Upgrading current practices in Vis/NIR spectroscopy for in situ orchard monitoring". Acta Horticulturae, (1194): 745-752. https://doi.org/10.17660/ActaHortic.2018.1194.106
Cavaco, Ana M.; Pires, Rosa; Antunes, M. Dulce; Panagopoulos, Thomas; Brázio, António; Afonso, Andreia M.; Silva, Leonardo; et al. 2018. "Validation of short wave near infrared calibration models for the quality and ripening of ‘Newhall’ orange on tree across years and orchards". Postharvest Biology and Technology, 141: 86-97. https://doi.org/10.1016/j.postharvbio.2018.03.013
Guerreiro, A.C.; Gago, C.L.; Vieira, A.I.; Brázio, A.; Cavaco, A.M.; Antunes, M.D.; Panagopoulos, T.; Veloso, F.; Guerra, R.. 2018. "Quality characterization of kiwifruit Actinidia chinensis var. deliciosa ‘Hayward’ using destructive and nondestructive methods during storage". Acta Horticulturae, (1218): 497-502. https://doi.org/10.17660/actahortic.2018.1218.68
Cavaco, A.M.; Antunes, M.D.; Guerra, R.; Rosendo, M.; Pires, R.; Brázio, A.; Silva, L.; Afonso, A.M.; Panagopoulos, T.. 2018. "Fruit quality survey techniques to optimize crop management in citrus orchards". Acta Horticulturae, (1194): 135-142. https://doi.org/10.17660/actahortic.2018.1194.21
Vieira, A.I.; Guerreiro, A.C.; Gago, C.L.; Brázio, A.; Guerra, R.; Cavaco, A.M.; Panagopoulos, T.; Veloso, F.; Antunes, M.D.. 2018. An attempt to find a non-destructive method to determine ripeness of kiwifruit (Actinidia chinensis Planch. ‘Jintao’). Vol. 1218. https://doi.org/10.17660/ActaHortic.2018.1218.67
Bexiga, F.; Rodrigues, D.; Guerra, R.; Brázio, A.; Balegas, T.; Cavaco, A.M.; Antunes, M.D.; Valente de Oliveira, J.. 2017. "A TSS classification study of ‘Rocha’ pear (Pyrus communis L.) based on non-invasive visible/near infra-red reflectance spectra". Postharvest Biology and Technology, 132: 23-30. https://doi.org/10.1016/j.postharvbio.2017.05.014
Schulze, P.S.C.; Guerra, R.; Pereira, H.; Schüler, L.M.; Varela, J.C.S.. 2017. "Flashing LEDs for Microalgal Production". Trends in Biotechnology. https://doi.org/10.1016/j.tibtech.2017.07.011
Canário, D.V.P.; Figueiredo, E.; Franco, J.C.; Guerra, R.. 2017. "Detecting early mealybug infestation stages on tomato plants using optical spectroscopy". European Journal of Horticultural Science, 82 (3): 141-148. https://doi.org/10.17660/eJHS.2017/82.3.4
Afonso, A.M.; Guerra, R.; Cavaco, A.M.; Pinto, P.; Andrade, A.; Duarte, A.; Power, D.M.; Marques, N.T.. 2017. "Identification of asymptomatic plants infected with Citrus tristeza virus from a time series of leaf spectral characteristics". Computers and Electronics in Agriculture, 141: 340-350. https://doi.org/10.1016/j.compag.2017.08.001
Peter S.C. Schulze; Hugo G.C. Pereira; Tamára F.C. Santos; Lisa Schueler; Rui Guerra; Luísa A. Barreira; José A. Perales; João C.S. Varela. 2016. "Effect of light quality supplied by light emitting diodes (LEDs) on growth and biochemical profiles of Nannochloropsis oculata and Tetraselmis chuii". Algal Research, 16: 387-398. https://doi.org/10.1016/j.algal.2016.03.034
Guerra, Rui Manuel Farinha das Neves. 2016. "Temporal metabolic profiling of the Quercus suber–Phytophthora cinnamomi system by middle-infrared spectroscopy". Forest Pathology. https://doi.org/10.1111/efp.12229
Ulloa, P.A.; Guerra, R.; Cavaco, A.M.; Rosa da Costa, A.M.; Figueira, A.C.; Brigas, A.F.. 2013. "Determination of the botanical origin of honey by sensor fusion of impedance e-tongue and optical spectroscopy". Computers and Electronics in Agriculture, 94: 1-11. https://doi.org/10.1016/j.compag.2013.03.001
Cavaco, A.M.; Miguel, G.; Antunes, D.; Guerra, R.. 2012. Determination of geographical and botanical origin of honey: From sensory evaluation to the state of the art of non-invasive technology. http://www.scopus.com/inward/record.url?eid=2-s2.0-84895404273&partnerID=MN8TOARS
Antunes, M.D.; Cavaco, A.M.; Gardé, I.; Guerra, R.; Marques Da Silva, J.. 2012. "Chlorophyll a fluorescence: A fast and low-cost tool to detect superficial scald in 'Rocha' pear (Pyrus communis L. 'Rocha')?". Acta Horticulturae, 934: 159-166. http://www.scopus.com/inward/record.url?eid=2-s2.0-84872193243&partnerID=MN8TOARS
Guerra, R.; Gardé, I.V.; Antunes, M.D.; da Silva, J.M.; Antunes, R.; Cavaco, A.M.. 2012. "A possibility for non-invasive diagnosis of superficial scald in 'Rocha' pear based on chlorophyll a fluorescence, colorimetry, and the relation between a-farnesene and conjugated trienols". Scientia Horticulturae, 134: 127-138. https://doi.org/10.1016/j.scienta.2011.11.017
Brázio, António; Cavaco, Ana Margarida; Guerra, Rui. 2010. "A simplified two layer model for light diffuse reflectance in thin skin fruits". Progress in Agricultural Engineering Sciences, 6 (1): 35-72. https://doi.org/10.1556/progress.6.2010.3
Cavaco, A.M.; Antunes, M.D.C.; Marques Da Silva, J.; Guerra, R.. 2010. A preliminary approach to the Prediction of 'Rocha' pear skin Pigments by Vis/NIR reflectance spectroscopy. Vol. 858. http://www.scopus.com/inward/record.url?eid=2-s2.0-77957193900&partnerID=MN8TOARS
Cavaco, A.M.; Pinto, P.; Antunes, M.D.; Silva, J.M.d.; Guerra, R.. 2009. "'Rocha' pear firmness predicted by a Vis/NIR segmented model". Postharvest Biology and Technology, 51 (3): 311-319. https://doi.org/10.1016/j.postharvbio.2008.08.013
Guerra, Rui Manuel Farinha das Neves. 2009. "Preliminary results on the non-invasive diagnosis of superfi- cial scald in ‘Rocha’ pear by fluorescence imaging ". Em Image Analysis for Agricultural Products and Processes .
Guerra, Rui Manuel Farinha das Neves. 2008. "A First Approach to the Optical and Antioxidant Properties of Propolis Collected at Different Sites of Algarve Region ".
Neves, R.; Guerra, R.. 2008. "A new path integral approximation to photon propagation in turbid media". Waves in Random and Complex Media, 18 (4): 669-692. https://doi.org/10.1080/17455030802315102
Antunes, D.; Cavaco, A.M.; Da Silva, J.M.; Guerra, R.. 2008. "Preliminary results on the non-destructive determination of pear (Pyrus communis L.) cv. Rocha ripeness by visible/near infrared reflectance spectroscopy". Acta Horticulturae, 800 PART 2: 1099-1105. http://www.scopus.com/inward/record.url?eid=2-s2.0-71449118130&partnerID=MN8TOARS
Pinto, P.N.; Fernandes, P.; Guerra, R.. 2007. "Simultaneous determination of the mean and standard deviation of quasi-monodisperse size distributions of microspheres by static light scattering". Measurement Science and Technology, 18 (5): 1209-1223. https://doi.org/10.1088/0957-0233/18/5/007
Passos, D.; Hebden, J.C.; Pinto, P.N.; Guerra, R.. 2005. "Tissue phantom for optical diagnostics based on a suspension of microspheres with a fractal size distribution". Journal of Biomedical Optics, 10 (6). https://doi.org/10.1117/1.2139971
Gustafsson, J.O.; Schmidt, F.M.; Guerra, R.; Axner, O.. 2004. "Double modulation diode laser absorption spectrometry by simultaneous wavelength modulation and optically induced population modulation - Application to trace element detection in window-equipped graphite furnaces". Spectrochimica Acta - Part B Atomic Spectroscopy, 59 (1): 67-92. https://doi.org/10.1016/j.sab.2003.10.003
Guerra, R.; Mendonça, J.T.. 2000. "Mie and Debye scattering in dusty plasmas". Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, 62 (1 B): 1190-1201. https://doi.org/10.1103/PhysRevE.62.1190
Guerra, R.; Mendonça, J.T.; Shukla, P.K.. 1998. "Stimulated Raman, Brillouin and dust-Brillouin scattering in dusty plasmas". Journal of Plasma Physics, 59 (2): 343-365. https://doi.org/10.1017/S002237789700620X
Mendonca, J.T.; Shukla, P.K.; Martins, A.M.; Guerra, R.. 1997. "Brownian motion of a dust particle in a plasma". Physics of Plasmas, 4 (3): 674-677. https://doi.org/10.1063/1.872162
Guerra, R.; Mendonça, J.T.; Dendy, R.O.; Shukla, P.K.. 1996. "Scattering of electromagnetic waves by counter-rotating vortex streets in plasmas". Physics of Plasmas, 3 (3): 901-905. https://doi.org/10.1063/1.871793
Guerra, R.; Shukla, P.K.. 1996. "Nonlinear coupling between Langmuir and dust-acoustic waves in dusty plasmas with dust charge perturbations".
Resendes, D.P.; Mendonça, J.T.; Guerra, R.; Shukla, P.K.. 1996. "Multiple scattering of electromagnetic waves by large amplitude drift turbulent vortex streets in a plasma".
