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Precision silviculture:use of UAVs and comparison of deep learning models for the identification and segmentation of tree crowns in pine crops

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International Journal of Digital Earth 2022年第1期15卷 2223-2238页

作者： Manuel Ignacio Perez Bruno Karelovic Roberto Molina rodrigo Saavedra Pierluigi Cerulo Guillermo Cabrera Department of Computer Sciences Universidad de Concepcion Biblioteca CentralConcepcionChile Celulosa Arauco y Constitucion SA I&DSantiagoChile

The monitoring of trees is crucial for the management of large areas of forest cultivations,but this process may be ***,remotely sensed data offers a solution to automate this *** this work,we used two neural network methods named You Only Look Once(YOLO)and Mask R-CNN to overcome the challenging tasks of counting,detecting,and segmenting high dimensional Red–Green–Blue(RGB)images taken from unmanned aerial vehicles(UAVs).We present a processing framework,which is suitable to generate accurate predictions for the aforementioned tasks using a reasonable amount of labeled *** compared our method using forest stands of different ages and *** counting,YOLO overestimates 8.5%of the detected trees on average,whereas Mask R-CNN overestimates a 4.7%of the *** the detection task,YOLO obtains a precision of 0.72 and a recall of 0.68 on average,while Mask R-CNN obtains a precision of 0.82 and a recall of *** segmentation,YOLO overestimates a 13.5%of the predicted area on average,whereas Mask R-CNN overestimates a 9.2%.The proposed methods present a cost-effective solution for forest monitoring using RGB images and have been successfully used to monitor∼146,500 acres of pine cultivations.

关键词： Artificial intelligence tree identification forestry remote sensing

Influence of variables related to soil weathering on the geomechanical performance of tropical soils

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Journal of Rock Mechanics and Geotechnical Engineering 2023年第9期15卷 2423-2440页

作者： rodrigo Cesar Pierozan Gregorio Luís Silva Araújo Ennio Marques Palmeira Celso Romanel Department of Civil Engineering Federal Institute of EducationScienceand Technology of RondoniaPorto VelhoROBrazil Department of Civil and Environmental Engineering University of BrasiliaBrasiliaDFBrazil Department of Civil and Environmental Engineering Pontifical Catholic University of Rio de JaneiroRio de JaneiroRJBrazil

This paper presents an experimental and analytical investigation of the influence of variables related to soil weathering on the geomechanical performance of sand-silt mixtures containing lateritic soils,*** weathered tropical soils with the influence of interparticle *** sand-silt mixtures containing different relative proportions between uniform sand and lateritic soil were produced,and geomechanical soil characterization tests were *** on the results,a transition from a primarily coarse-to a fine-grained prevailing soil structure was found to cause considerable impact on the geomechanical performance of these soils,as evidenced by design variables related to soil mineralogy and size distribution ***,fines contents of both individual soil particles and soil aggregations were found to correlate with experimental results,while the relative proportion between sesquioxides(aluminum,and iron oxides),and silica,***-silica ratios(SSR^(-1)),facilitated estimates concerning changes in geomechanical ***,the application of the sandsilt mixtures containing lateritic soil on soil walls reinforced with polymeric strips was also evaluated,further emphasizing the potential advantages of adopting variables related to soil weathering on design guidelines concerning tropical soils.

关键词： Sesquioxides-silica ratio Tropical soils Sand-silt mixtures Lateritic soil Reinforced soil walls

Genetic diversity of Leishmania donovani isolates from cutaneous lesions of military personnel in the Mullaitivu and Kilinochchi districts of the Northern Province,Sri Lanka

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Asian Pacific Journal of Tropical Medicine 2022年第9期15卷 418-424页

作者： Tharaka Wijerathna Nayana Gunathilaka Saveen Semege Nishantha Pathirana Wasana rodrigo Deepika Fernando Department of Parasitology Faculty of MedicineUniversity of KelaniyaRagamaSri Lanka Directorate of Army Preventive Medicine&Mental Health Services Army HeadquartersSri JayawardenepuraSri Lanka Sri Lanka Army Hospital ColomboSri Lanka Department of Zoology Faculty of Natural SciencesOpen University of Sri LankaNawalaNugegoda Department of Parasitology Faculty of MedicineUniversity of ColomboSri Lanka

Objective:To compare the DNA sequences of Leishmania(L.)donovani isolated from individuals in two districts of the Northern Province with other parts of Sri Lanka and neighboring ***:Samples were collected from military personnel at the Army Hospital,Narahenpita,Sri Lanka from November 2018 to March 2020.A portion of the samples was fixed,stained with Giemsa and observed under the light *** genomic The DNA was extracted from the remaining portion of the samples using DNEasy blood tissue kit(Qiagen,Germany)and amplified using Leishmania genus-specific primers for molecular diagnosis *** was amplified using *** species-specific primers by PCR and the amplified product was sequenced for comparison of nucleotide ***:Out of 76 suspected patients,at least one biological sample of 45(59.2%)was positive for *** upon ***,33(43.4%)were positive in Leishmania genus-specific PCR,but only 23(30.3%)were positive in *** specific *** dendrogram indicates that the current sequences clustered together with those from Nepal and Gampaha districts(Western Province),Sri Lanka,while the Indian and Eastern African sequences clustered ***:The genetic diversity was low among the isolates,indicating a single and possibly a local point of ***,the similarity of Sri Lankan and Nepal strains indicate a possibility of a shared point of origin,which needs more extensive evidence to confirm.

关键词： Leishmaniasis Sri Lanka Phylogenetics Kilinochchi Mullaitivu Northern Province

Feasibility of the 2-point method to determine the load-velocity relationship variables during the countermovement jump exercise

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Journal of Sport and Health Science 2023年第4期12卷 544-552,F0003页

作者： Alejandro Pérez-Castilla rodrigo Ramirez-Campillo John F.T.Fernandes Amador García-Ramos Department of Physical Education and Sport Faculty of Sport SciencesUniversity of GranadaGranada 18011Spain Human Performance Laboratory Department of Physical Activity SciencesUniversidad de Los LagosSantiago 5170000Chile Centro de Investigacion en Fisiologıa del Ejercicio Facultad de CienciasUniversidad MayorSantiago 8580745Chile Higher Education Sport Hartpury UniversityHartpury GL193BEUK Department of Sports Sciences and Physical Conditioning Faculty of EducationUniversidad Catolica de la Santısima ConcepcionConcepcion 4090541Chile

Purpose:This study aimed to examine the reliability and validity of load-velocity(L-V)relationship variables obtained through the 2-point method using different load combinations and velocity ***:Twenty men performed 2 identical sessions consisting of 2 countermovement jumps against 4 external loads(20 kg,40 kg,60 kg,and80 kg)and a heavy squat against a load linked to a mean velocity(MV)of 0.55 m/s(load_(0.55)).The L-V relationship variables(load-axis intercept(L_(0)),velocity-axis intercept(v_(0)),and area under the L-V relationship line(A_(line)))were obtained using 3 velocity variables(MV,mean propulsive velocity(MPV),and peak velocity)by the multiple-point method including(20-40-60-80-load_(0.55))and excluding(20-40-60-80)the heavy squat,as well as from their respective 2-point methods(20-load_(0.55)and 20-80).Results:The L-V relationship variables were obtained with an acceptable reliability(coefncient of variation(CV)≤7.30%;intra-class correlation coefficient>0.63).The reliability of L_(0)and v_(0)was comparable for both methods(CV_(ratio)(calculated as higher value/lower value):1.11-1.12),but the multiple-point method provided Al_(ine)with a greater reliability(CV_(ratio)=1.26).The use of a heavy squat provided the L-V relationship variables with a comparable or higher reliability than the use of a heavy countermovement jump load(CV_(ratio):1.06-1.19).The peak velocity provided the load-velocity relationship variables with the greatest reliability(CV_(ratio):1.15-1.86)followed by the MV(CV_(ratio):1.07-1.18),and finally the *** 2-point methods only revealed an acceptable validity for the MV and MPV(effect size≤0.19;Pearson s product-moment correlation coefficient≥0.96;Lin's concordance correlation coefficient≥0.94).Conclusion:The 2-point method obtained from a heavy squat load and MV or MPV is a quick,safe,and reliable procedure to evaluate the lower-body maximal neuromuscular capacities through the L-V relationship.

关键词： Force-velocity relationship Mean velocity Multiple-point method Peak velocity Velocity-based training

The burden of prolonged sedentary behavior imposed by uberization

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Sports Medicine and Health Science 2023年第2期5卷 159-163页

作者： Thalles Guilarducci Costa Vinnycius Nunes de oliveira Douglas Assis Teles Santos Ricardo Borges Viana Marilia Santos Andrade rodrigo Luiz Vancini Katja Weiss Beat Knechtle Claudio Andre Barbosa de Lira Laboratório de Avaliação do Movimento Humano Faculdade de Educação Física e DançaUniversidade Federal de GoiásGoiâniaBrazil Colegiado de Educação Física Universidade do Estado da BahiaCampus XTeixeira de FreitasBahiaBrazil Instituto de Educação Física e Esportes Universidade Federal do CearáFortalezaBrazil Departamento de Fisiologia Universidade Federal de São PauloSão PauloBrazil Centro de Educação Física e Desportos Universidade Federal do Espírito SantoVitóriaBrazil Institute of Primary Care University of Zurich8006ZurichSwitzerland Medbase St.Gallen Am Vadianplatz 9000St.GallenSwitzerland

Mobility applications are rapidly growing in cities worldwide due to their convenience and low *** applications drivers experience vast flexibility in work hours,often work longer than in fixed-hours jobs,and can constantly transport passengers in their vehicles for up to 12 h;after this,they must go offline for eight consecutive hours before driving ***,drivers have found an easy way around this limitation by switching to other apps and continuing *** burden of prolonged work can increase sedentary behavior among mobility applications *** behavior is any waking activity in which the individual expends 1.5 metabolic equivalents(METs)or less while sitting or *** behavior can increase the risk of detrimental effects on *** this opinion article,we aim to discuss the possible effects of the burden of prolonged work on the sedentary behavior of mobility applications drivers and propose possible strategies to face this concerning situation.

关键词： Mobility application Drivers Health outcomes Sedentary lifestyle Quality of life

Degradation of duloxetine: Identification of transformation products by UHPLC-ESI(+)-HRMS/MS,in silico toxicity and wastewater analysis

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Journal of Environmental Sciences 2019年第8期31卷 113-123页

作者： rodrigo A.Osawa Ana P.Carvalho Olinda C.Monteiro M.Conceicao oliveira M.Helena Florêncio Centro de Química e Bioquímica Faculdade de Ciências Universidade de Lisboa Laboratório de FTICR e Espectrometria de Massa Estrutural Faculdade de Ciências Universidade de Lisboa Centro de Química Estrutural Instituto Superior Técnico Universidade de Lisboa

Duloxetine(DUL), an antidepressant drug, has been detected in surface water and wastewater effluents, however, there is little information on the formation of its transformation products(TPs). In this work, hydrolysis, photodegradation(UV irradiation) and chlorination experiments were performed on spiked distillated water, under controlled experimental conditions to simulate abiotic processes that can occur in the environment and wastewater treatment plants(WWTPs). Eleven TPs, nine from reaction with UV light and two from chlorine contact, were formed and detected by ultra-high performance liquid chromatography coupled to quadrupole time-of-flight mass spectrometry, and nine of them had their chemical structures elucidated upon analyses of their fragmentation patterns in MS/MS spectra. The formation and degradation of the TPs were observed. The parent compound was completely degraded after30 min in photodegradation and after 24 hr in chlorination. Almost all TPs were completely degraded in the experiments. The ecotoxicity and mutagenicity of the TPs were predicted based on several in silico models and it was found that a few of these products presented more ecotoxicity than DUL itself and six TPs showed positive mutagenicity. Finally, wastewater samples were analyzed and DUL and one TP, possibly formed by chlorination process, were detected in the effluent, which showed that WWTP not only did not remove DUL, but also formed a TP.

关键词： High resolution mass spectrometry Duloxetine Degradation processes Transformation products Wastewater analysis In silico toxicity

A Portable Algorithm to Retrieve Bottom Depth of Optically Shallow Waters from Top-Of-Atmosphere Measurements

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Journal of Remote Sensing 2022年第1期2022卷 268-283页

作者： Wendian Lai Zhongping Lee Junwei Wang Yongchao Wang rodrigo Garcia Huaguo Zhang State Key Laboratory of Marine Environmental Science College of Ocean and Earth SciencesXiamen UniversityXiamen 361102China School for the Environment University of Massachusetts BostonBostonMA 02125USA School of Earth Sciences The University of Western AustraliaCrawleyWA 6009Australia State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of OceanographyMinistry of Natural ResourcesHangzhouChina

Bottom depth(H)of optically shallow waters can be retrieved from multiband imagery,where remote sensing reflectance(R_(rs))are commonly used as the *** of the difficulties of removing the atmospheric effects in coastal areas,quite often,there are no valid R_(rs) from satellites for the retrieval of *** importantly,the empirical algorithms for H are hardly portable to new *** this study,using data from Landsat-8 and ICESat-2 as examples,we present an approach to retrieve H directly from the top-of-atmosphere(TOA)*** not only bypasses the requirement to correct the effects of aerosols but also shows promising portability to areas not included in algorithm ***,we use Rayleigh-corrected TOA reflectance(ρ_(rc))in the 443–2300nm range as input,along with a multilayer perceptron(MLP^(ρ_(rc))_(H)),for the retrieval of *** than 78,000 matchup points ofρ_(rc)and H(0–25 m)were used to train MLP^(ρ_(rc))_(H),which resulted in a Mean Absolute Percentage Difference(MARD)of 8.8%and a coefficient of determination(R^(2))of *** MLP^(ρ_(rc))_(H)was further applied to Landsat-8 data of six regions not included in the training phase,generating MARD and R^(2)values of 8.3%and 0.98,*** contrast,a conventional two-band ratio algorithm with R_(rs) as the input generated MARD and R^(2)values of 31.6%and 0.68 and significantly fewer H retrievals due to failures in atmospheric *** results indicate a breakthrough of algorithm portability of MLP^(ρ_(rc))_(H)in sensing H of optically shallow waters.

关键词： Optically reflectance shallow

Spatiotemporal Variability of Methane over the Amazon from Satellite Observations

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Advances in Atmospheric Sciences 2016年第7期33卷 852-864页

作者： Igor oliveira RIBEIRO] rodrigo Augusto Ferreira de SOUZA Rita Valeria ANDREOLI Mary Toshie KAYANO Patrfcia dos Santos COSTA Post-Graduate Program in Climate and Environment CLIAMBINPA/UEAAv.Andre Araujo2936Campus 11Aleixo69060-001ManausAMBrasil Amazonas State University Superior School of TechnologyAv.Darcy Vargas1200Parque 10 de Novembro69065-020ManausAMBrasil National Institute for Space Research Center For Weather Forecasting and Climate ResearchAv.dos Astronautas175812227-010Sao Josd dos CamposSPBrasil

The spatiotemporal variability of the greenhouse gas methane （CH4） in the atmosphere over the Amazon is studied using data from the space-borne measurements of the Atmospheric Infrared Sounder on board NASA＇s AQUA satellite for the period 2003-12. The results show a pronounced variability of this gas over the Amazon Basin lowlands region, where wetland areas occur. CH4 has a well-defined seasonal behavior, with a progressive increase of its concentration during the dry season, followed by a decrease during the wet season. Concerning this variability, the present study indicates the important role of ENSO in modulating the variability of CH4 emissions over the northern Amazon, where this association seems to be mostly linked to changes in flooded areas in response to ENSO-related precipitation changes. In this region, a CH4 decrease （increase） is due to the E1 Nifio-related （La Nifia-related） dryness （wetness）. On the other hand, an increase （decrease） in the biomass burning over the southeastern Amazon during very dry （wet） years explains the increase （decrease） in CH4 emissions in this region. The present analysis identifies the two main areas of the Amazon, its northern and southeastern sectors, with remarkable interannual variations of CH4. This result might be useful for future monitoring of the variations in the concentration of CH4, the second-most important greenhouse gas, in this area.

关键词： climate variability methane satellite data Amazon region

Materials as activator of future global science and technology challenges

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Progress in Natural Science:Materials International 2021年第6期31卷 785-791页

作者： rodrigo Martins Full Professor at FCT-NOVA President of the International Union of Materials Research Societies President of the European Academy of Sciences

The aim of this statement is to give a contribution towards the future, where for all, materials are the driven force for the transformations we aim to reach and for which a global common house is imperative to be established, as the International Union of Materials Research Societies, IUMRS aims to be the central vehicle for such, aiming to boost innovation to its maxima, without compromising vital global principles of opening science to the *** is consolidated by 4 main principles: Circular Economy; Trans disciplinarity; Horizontal cross cutting synergy(the introduced Metro Station concept); look always to the Big Picture and not to silos. This means that the traditional vertical thematic topics that were essential to define so far, the so-called road maps for something should be revisited and reconverted towards much larger horizontal scenarios.

关键词： Materials science and engineering Green technologies and products Materials activator Materials accelerator of progress changes