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Deep convolutional neural network for damaged vegetation segmentation from RGB images based on virtual NIR-channel estimation

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Artificial Intelligence in Agriculture 2022年第1期6卷 199-210页

作者： Artzai Picon Arantza Bereciartua-Perez Itziar Eguskiza javier Romero-Rodriguez carlos javier jimenez-ruiz Till Eggers Christian Klukas Ramon Navarra-Mestre TECNALIA Basque Research and Technology Alliance(BRTA)Parque Tecnológico de BizkaiaC/Geldo.Edificio 700E-48160 Derio-BizkaiaSpain University of the Basque Country Plaza Torres Quevedo48013 BilbaoSpain BASF Espanola S.L.Carretera A376 41710 Utrera SevillaSpain BASF SE Speyererstrasse 267117 LimburgerhofGermany

Performing accurate and automated semantic segmentation of vegetation is a first algorithmic step towards more complex models that can extract accurate biological information on crop health,weed presence and phenological state,among ***,models based on normalized difference vegetation index(NDVI),near infrared channel(NIR)or RGB have been a good indicator of vegetation ***,these methods are not suitable for accurately segmenting vegetation showing damage,which precludes their use for downstream phenotyping *** this paper,we propose a comprehensive method for robust vegetation segmentation in RGB images that can cope with damaged *** method consists of a first regression convolutional neural network to estimate a virtual NIR channel from an RGB ***,we compute two newly proposed vegetation indices from this estimated virtual NIR:the infrared-dark channel subtraction(IDCS)and infrared-dark channel ratio(IDCR)***,both the RGB image and the estimated indices are fed into a semantic segmentation deep convolutional neural network to train a model to segment vegetation regardless of damage or *** model was tested on 84 plots containing thirteen vegetation species showing different degrees of damage and acquired over 28 *** results show that the best segmentation is obtained when the input image is augmented with the proposed virtual NIR channel(F1=0:94)and with the proposed IDCR and IDCS vegetation indices(F1=0:95)derived from the estimated NIR channel,while the use of only the image or RGB indices lead to inferior performance(RGB(F1=0:90)NIR(F1=0:82)or NDVI(F1=0:89)channel).The proposed method provides an end-to-end land cover map segmentation method directly from simple RGB images and has been successfully validated in real field conditions.

关键词： Vegetation indices estimation Vegetation coverage map Near infrared estimation Convolutional neural network Deep learning

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The potential of starch-chitosan blends with poloxamer for the preparation of microparticles by spray-drying

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Particuology 2024年第6期89卷 1-10页

作者： Juan Enrique Barranco-García Carolina Caicedo Enrique javier Jiménez-Regalado carlos Espinoza-González Graciela Morales Rocio Yaneli Aguirre-Loredo Abril Fonseca-García Tecnológico Nacional de México/Instituto Tecnológico de Oaxaca Departamento de Química y BioquímicaAvenida Ing.Víctor Bravo Ahuja No.125Esquina Calzada Tecnológico68030OaxacaMexico Faculty of Engineering Unidad Central del Valle del Cauca(UCEVA)Carrera 17a 48-144763022TuluáColombia Centro de Investigación en Química Aplicada(CIQA) Blvd.Enrique Reyna Hermosillo 14025294SaltilloCoahuilaMexico Investigadoras por México CONAHCYT-CIQA Av.Insurgentes Sur 1562Col.Crédito Constructor03940Alcaldía Benito JuárezCDMXMexico

Using biopolymers as wall materials in spray drying poses challenges,particularly in attaining flowability and thermal stability among their physicochemical *** paper addresses these challenges by preparing microparticles using a blend of starch–chitosan and a poloxamer,commercially named Pluronic®*** aimed to elucidate the effects of varying poloxamer concentrations on the resulting particles through the spray drying *** with a poloxamer concentration of 3%(w/v)demonstrated a notably higher yield,especially when compared to those with 0%and 1%*** with 3%and 5%(w/v)poloxamer displayed a narrower particle size distribution,with the 3%blend showing a superior yield attributed to arrangements of blend components that improve flowability.X-ray diffraction analysis showcased the characteristic peaks of A-type starch form,with shifts suggesting enhanced interactions between *** with increased poloxamer content showed elevated thermal degradation temperatures,with the 3%blend registering a significant rise,opening avenues for encapsulating heat-sensitive *** study primarily focuses on the preparation and basic characterization of *** underscores the potential of blends with optimal poloxamer concentrations in microencapsulation,emphasizing further research to harness their capabilities thoroughly.

关键词： Biopolymer Starch Chitosan Pluronic®F127 Microparticles Spray drying

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Microfluidic bubble-generator enables digital light processing 3D printing of porous structures

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Aggregate 2024年第1期5卷 280-291页

作者： Philipp Weber Ling Cai Francisco javier Aguilar Rojas carlos Ezio Garciamendez-Mijares Maria Celeste Tirelli Francesco Nalin Jakub Jaroszewicz Wojciech Swi eszkowski Marco Costantini Yu Shrike Zhang Division of Engineering in Medicine Department of MedicineBrigham and Women’s HospitalHarvard Medical SchoolCambridgeMassachusettsUSA Institute of Physical Chemistry—Polish Academy of Sciences KasprzakaPoland Biomaterials Group Materials Design DivisionFaculty of Materials Science and EngineeringWarsaw University of TechnologyWoloskaPoland

Three-dimensional(3D)printing is an emerging technique that has shown promising success in engineering human tissues in recent *** development of vatphotopolymerization printing modalities has significantly enhanced the complexity level for 3D printing of various functional structures and ***,the development of microfluidic chip systems is an emerging research sector with promising medical *** work demonstrates the coupling of a digital light processing(DLP)printing procedure with a microfluidic chip system to produce size-tunable,3D-printable porosities with narrow pore size distributions within a gelatin methacryloyl(GelMA)hydrogel *** is found that the generation of size-tunable gas bubbles trapped within an aqueous GelMA hydrogel-precursor can be controlled with high ***,the porosities are printed in two-dimensional(2D)as well as in 3D using the DLP *** addition,the cytocompatibility of the printed porous scaffolds is investigated using fibroblasts,where high cell viabilities as well as cell proliferation,spreading,and migration are *** is anticipated that the strategy is widely applicable in a range of application areas such as tissue engineering and regenerative medicine,among others.

关键词： 3D printing biofabrication bubble digital light processing microfluidics porous

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Intense pulsed light‑based treatment for the improvement of symptoms in glaucoma patients treated with hypotensive eye drops

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Eye and Vision 2024年第2期10卷 12-21页

作者： Jose Maria Martinez‑de‑la‑Casa carlos Oribio‑Quinto Almudena Milans‑del‑Bosch Pilar Perez‑Garcia Laura Morales‑Fernandez javier Garcia‑Bella Jose Manuel Benitez‑del‑Castillo Julian Garcia‑Feijoo David P.Pinero Ophthalmology Unit Department of Ophthalmology and ORLFaculty of MedicineHospital Clinico San-CarlosUniversidad Complutense de MadridInstituto de Investigacion Sanitaria del Hospital Clinico San-Carlos(IdISSC)28040 MadridSpain Department of Immunology Ophthalmology and ORLSchool of MedicineInstituto de Investigaciones Oftalmologicas Ramon CastroviejoUniversidad Complutense de MadridMadridSpain Department of Optics Pharmacology and AnatomyUniversity of AlicanteAlicanteSpain

Background:Ocular surface disease in glaucoma patients is a significant ocular co-morbidity that can affect 40%to 59%of these patients *** current study was aimed at evaluating the potential clinical benefit of an intense pulsed light(IPL)-based treatment in glaucomatous patients with ocular surface disease due to prolonged hypotensive eyedrop *** our knowledge,this is the first series analyzing the therapeutic effect of this treatment option in this type of ***:This non-comparative prospective case series study enrolled a total of 30 glaucoma patients ranging in age from 57 to 94 years old and treated with hypotensive eyedrops for years with dry eye *** patients received four sessions of IPL treatment using the Optima IPL system(Lumenis,Yokneam,Israel)adjusted to the official optimized Lumenis *** in symptomatology,corneal staining,conjunctival hyperemia,non-invasive break-up time(NIBUT),tear osmolarity,tear meniscus height(TMH),meiboscore and meibomian gland expressibility was analyzed after ***:Statistically significant reductions were observed after IPL treatment in the symptomatology scores measured with different questionnaires[ocular surface disease index(OSDI),standard patient evaluation of eye dryness(SPEED)and symptom assessment questionnaire in dry eye(SANDE)]as well as with the visual analogue scale(P<0.001).Mean change in OSDI was−15.0±11.3.A significant reduction was found after treatment in the corneal staining score(P<0.001).A significant reduction was found in tear film meniscus height(P=0.012),as well as in tear film osmolarity(P=0.001).A significant reduction was also found in meibomian gland expressibility(P=0.003),changing the percentage of grade 3 eyes from 44.4%before IPL to 17.2%after ***:IPL therapy combined with meibomian gland expression(MGX)seems to be an effective option to improve symptomatology in glaucomatous patients with ocular surface diseas

关键词： Glaucoma Intense pulsed light Dry eye Meibomian glands

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Metastatic pancreatic and lung cancer patient in complete remission following immunotherapy: A case report and review of literature

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World Journal of Gastrointestinal Oncology 2024年第5期16卷 2233-2240页

作者： Joaquina Martínez-Galán Cristina Jiménez-Luna Isabel Rodriguez Elisabeth Maza carlos García-Collado Antonio Rodríguez-Fernández javier Luis López-Hidalgo Octavio Caba Department of Medical Oncology Virgen de las Nieves University HospitalGranada 18014Spain Instituto de Investigación Biosanitaria Ibs.GranadaGranada 18012Spain Institute of Biopathology and Regenerative Medicine(IBIMER) University of GranadaGranada 18016Spain Pharmacogenetics Unit Virgen de las Nieves University HospitalGranada 18014Spain Department of Medicina Nuclear Virgen de las Nieves University HospitalGranada 18014Spain Department of Anatomía Patológica Virgen de las Nieves University HospitalGranada 18014Spain

BACKGROUND Metastatic pancreatic ductal adenocarcinoma(PDAC)is a lethal malignancy with dispiriting survival *** is a promising approach to many cancer types,but achieves poor outcomes in advanced PDAC due to its immunosuppressive tumor *** describe a case of metastatic PDAC effectively treated with *** SUMMARY We report the case of a 67-year-old woman with unresectable locally advanced PDAC,treated with gemcitabine plus nab-paclitaxel followed by radiotherapy plus *** nine months,pancreatic tumor progression was observed at the level of the hepatic hilum with the appearance of a new pulmonary nodule suggestive of a second primary,confirmed by left lung *** immunotherapy was then initiated with pembrolizumab,an immune checkpoint inhibitor targeting programmed cell death protein-1 that covers the two tumor *** patient showed a complete metabolic response that was maintained throughout the *** patient continues to be disease-free at 5.6 years since the start of *** These results suggest that the administration of pembrolizumab after chemoradiotherapy has a beneficial effect in patients with metastatic *** our knowledge,this is the first reported case of a patient with metastatic PDAC and metastatic lung cancer showing such a long-lasting complete response after pembrolizumab treatment without curative *** studies are required to determine biomarkers that identify PDAC patients most likely to benefit from this immunotherapy.

关键词： Pancreatic ductal adenocarcinoma Lung cancer Immunotherapy Pembrolizumab Programmed cell death protein-1 Case report

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Microsurgical management of radicular cyst using guided tissue regeneration technique:A case report

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World Journal of Clinical Cases 2024年第7期12卷 1346-1355页

作者： Juan carlos Gómez Mireles Eugenia Karina Martínez Carrillo Katia Alcalá Barbosa Evangelina Gutiérrez Cortés javier González Ramos Luis Antonio González Gómez Rubén Alberto Bayardo González Sarah Monserrat Lomelí Martínez Periodontics Specialty Department of Integral Dentistry ClinicsCentro Universitario de Ciencias de la SaludUniversidad de GuadalajaraGuadalajara 44340Mexico Endodontics Specialty Department of Integral Dentistry ClinicsCentro Universitario de Ciencias de la SaludUniversidad de GuadalajaraGuadalajara 44340Mexico Endodontics Specialty Department of ClinicsCentro Universitario de Los AltosUniversidad de GuadalajaraTepatitlán de Morelos 47620Mexico Specialty in Oral Pathology Surgical-Stomatological DepartmentAutonomous University of GuadalajaraZapopan 45129Mexico Independent Researcher Guadalajara 44340Mexico Department of Integral Dentistry Clinics Centro Universitario de Ciencias de la SaludUniversidad de GuadalajaraGuadalajara 44340Mexico Department of Medical and Life Sciences Centro Universitario de la CiénegaUniversidad de GuadalajaraOcotlán 47810Mexico Master of Public Health Department of Well-being and Sustainable DevelopmentCentro Universitario del NorteUniversidad de GuadalajaraColotlán 46200Mexico

BACKGROUND Radicular cyst is a lesion of odontogenic origin that arises from epithelial remains due to periapical periodontitis caused by inflammatory reactions generated at the apex of affected teeth with infected or necrotic *** therapeutic mana gement of radicular cysts is *** is only one case report of enucleation of a radicular cyst managed with microsurgery and apicoectomy,but without the use of the guided tissue regeneration(GTR)technique in the same surgical *** present clinical case describes the management of a radicular cyst with microsurgical approach,performance of an apicoectomy of the tooth associated with the entity,application of GTR technique,use of a resorbable membrane of type I bovine collagen,and bovine *** SUMMARY A 68-year-old patient presented with a radicular cyst from an upper lateral *** microsurgical management used was aimed at enucleating the chemical membrane,performing apicoectomy of the tooth along with careful and precise retrograde filling,and implementing GTR technique using a resorbable collagen membrane and bovine *** diagnosis of radicular cyst was confirmed using histopathological *** patient underwent follow-up evaluations at 10 and 30 d *** 4 months postoperative evaluation,she remained asymptomatic,and radiographs showed significant periapical healing with adequate bone *** These results suggest that microsurgical management using the GTR technique with collagen membrane and xenograft,contributes to bone regeneration.

关键词： Odontogenic cysts Apical periodontal cyst Dental root end cyst Case report

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All-fiber ellipsometer for nanoscale dielectric coatings

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Opto-Electronic Advances 2023年第10期6卷 31-43页

作者： Jose javier Imas Ignacio R.Matías Ignacio Del Villar Aritz Ozcáriz carlos ruiz Zamarreño Jacques Albert Department of Electrical Electronic and Communications EngineeringPublic University of NavarrePamplona 31006Spain Institute of Smart Cities Public University of NavarrePamplona 31006Spain Department of Electronics Carleton UniversityOttawa(Ontario)K1S 5B6Canada.

Multiple mode resonance shifts in tilted fiber Bragg gratings(TFBGs)are used to simultaneously measure the thickness and the refractive index of TiO_(2) thin films formed by Atomic Layer Deposition(ALD)on optical *** is achieved by comparing the experimental wavelength shifts of 8 TFBG resonances during the deposition process with simulated shifts from a range of thicknesses(T)and values of the real part of the refractive index(n).The minimization of an error function computed for each(n,T)pair then provides a solution for the thickness and refractive index of the deposited film and,a posteriori,to verify the deposition rate throughout the process from the time evolution of the wavelength shift *** of the results were carried out with a conventional ellipsometer on flat witness samples deposited simultaneously with the fiber and with scanning electron measurements on cut pieces of the fiber *** final values obtained by the TFBG(n=2.25,final thickness of 185 nm)were both within 4%of the validation *** approach provides a method to measure the formation of nanoscale dielectric coatings on fibers in situ for applications that require precise thicknesses and refractive indices,such as the optical fiber sensor ***,the TFBG can also be used as a process monitor for deposition on other substrates for deposition methods that produce uniform coatings on dissimilar shaped substrates,such as ALD.

关键词： tilted fiber Bragg grating(TFBG) mode transition ellipsometer

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Mental health in the virtual world:Challenges and opportunities in the metaverse era

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World Journal of Clinical Cases 2024年第17期12卷 2939-2945页

作者： Yolanda López del Hoyo Matilde Elices javier Garcia-Campayo Department of Psychology and Sociology University of ZaragozaZaragoza 50009Spain Mental Health Research Group Hospital del Mar Medical Research InstituteBarcelona 08003Spain Department of Psychiatry Miguel Servet HospitalAragon Institute for Health ResearchUniversity of ZaragozaZaragoza 50009Spain

Current rates of mental illness are *** illness mainly affects females and younger age *** use of the internet to deliver mental health care has been growing since 2020 and includes the implementation of novel mental health treatments using virtual reality,augmented reality,and artificial intelligence.A new three dimensional digital environment,known as the metaverse,has emerged as the next version of the *** intelligence,augmented reality,and virtual reality will create fully immersive,experiential,and interactive online environments in the *** will use a unique avatar to do anything they do in their“real”lives,including seeking and receiving mental health *** this opinion review,we reflect on how the metaverse could reshape how we deliver mental health treatment,its opportunities,and its challenges.

关键词： Metaverse Virtual world Artificial intelligence Mental health Virtual reality Augmented reality Technology

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Sociodemographic determinants associated with breastfeeding in term infants with low birth weight in Latin American countries

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World Journal of Clinical Pediatrics 2024年第1期13卷 141-149页

作者： carlos javier Avendaño-Vásquez Magda Liliana Villamizar-Osorio Claudia Jazmin Niño-Peñaranda Judith Medellín-Olaya Nadia Carolina Reina-Gamba School of Nursing Antonio Nariño UniversityBogotá111511Colombia School of Nursing Universidad Cooperativa de ColombiaBucaramanga 102536Colombia School of Nursing Universidad Nacional de ColombiaColombia 111511Colombia

BACKGROUND A progressive decrease in exclusive breastfeeding(BF)is observed in Latin America and the Caribbean compared with global *** possibility of being breastfed and continuing BF for>6 months is lower in low birth weight than in healthy-weight *** To identify factors associated with BF maintenance and promotion,with particular attention to low-and middle-income countries,by studying geographic,socioeconomic,and individual or neonatal health *** A scoping review was conducted in 2018 using the conceptual model of social determinants of health published by the Commission on Equity and Health Inequalities in the United *** extracted data with common characteristics were synthesized and categorized into two main themes:(1)Sociodemographic factors and proximal determinants involved in the initiation and maintenance of BF in low-birth-weight term infants in Latin America;and(2)individual characteristics related to the self-efficacy capacity for BF maintenance and adherence in low-birth-weight term *** This study identified maternal age,educational level,maternal economic capacity,social stratum,exposure to BF substitutes,access to BF information,and quality of health services as mediators for maintaining *** Individual self-efficacy factors that enable BF adherence in at-risk populations should be analyzed for better health outcomes.

关键词： Breastfeeding Low birth weight Latin America Self-efficacy Social determinants of health

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Nature and evolution of the lower crust under central Spain:Inferences from granulite xenoliths(Calatrava Volcanic Field-Spanish central system)

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Geoscience Frontiers 2023年第3期14卷 10-32页

作者： David Orejana carlos Villaseca Marlina A.Elburg Enrique Merino-Martínez javier García Serrano Departamento de Mineralogía y Petrología Universidad Complutense de MadridSpain Departamento de Dinámica Terrestre y Observación de la Tierra Instituto de Geociencias IGEO(UCMCSIC)MadridSpain Department of Geology University of JohannesburgSouth Africa Instituto Geológico y Minero de España–Consejo Superior de Investigaciones Científicas CN IGME–CSIC

So far,the nature and evolution of the lower crust under central Spain have been constrained mainly on the basis of a heterogeneous suite of granulite xenoliths from the Spanish Central System(SCS).In recent years,ultramafic volcanics from the Calatrava Volcanic Field(CVF)have also provided deep-seated crustal xenoliths which have not been studied in *** data,combining mineral,whole-rock and isotopic geochemistry with U–Pb–Hf isotope ratios in zircons from the CVF and SCS xenoliths,highlight the felsic composition of the lower crust under central Iberia.A number of the Calatrava xenoliths represents Variscan igneous protoliths,which are a minor population in the SCS,and were likely formed by crystallisation of intermediate and felsic melts in the lower crust during the Variscan orogeny(leucodiorite protolith age of 314±3 Ma and leucogranite protolith age of 308±2.5 Ma).U–Pb data of metamorphic zircons show that granulite-facies metamorphism mainly occurred from 299 to 285 Ma in both *** ages are slightly younger than those of granitic intrusions that could be genetically related to the granulitic residue,which points to a main role of U–Pb isotope resetting in lower crustal zircons during HT or UHT *** zircon U–Pb–Hf isotopic ratios support the idea that the lower crust in central Iberia consists mainly of Ordovician–Neoproterozoic metaigneous and metasedimentary rocks associated with the Cadomian continental arc of northern *** rocks provide evidence of mixing between juvenile magmas and an enriched crustal component,ultimately extracted from an Eburnean *** more evolved components present in detrital zircons are likely related to recycling of Archean crust derived from North Africa cratonic terranes.

关键词： Granulite xenoliths U-Pb geochronology Lu-Hf isotopes Calatrava Volcanic Field Spanish central system

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