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Evolution of Siderian juvenile crust to Rhyacian high Ba-Sr magmatism in the Mineiro Belt, southern S?o Francisco craton

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Geoscience Frontiers 2018年第4期9卷 977-995页

作者： Hugo Moreira Luís Seixas craig Storey Mike Fowler Stephanie Lasalle Ross Stevenson cristiano Lana School of Earth and Environmental Sciences University of Portsmouth Burnaby Building Bumaby Road Portsmouth POI 3QL UK Departamento de Geologia Escola de Minas Universidade Federal de Ouro Preto Ouro Preto MG 35400-000 Brazil GEOTOP Universite du Quebec a Montreal RO. Box 8888 Station Centre Ville Montreal Quebec H3C 3P8 Canada

Plutonic rocks from the Mineiro Belt, Brazil record a delayed onset of the transition from TTG to sanukitoid-type magmatism（high Ba-Sr）, starting during the Siderian magmatic lull when little juvenile magma was added to the continental crust. Rocks mostly belong to the calc-alkaline series, meta-to peraluminous and originally ＂Ⅰ-type＂,meaning that oxidized magmas were formed by partial melting of subducted material. The temporal distribution and apparent secular changes of the magmas are consistent with the onset of subduction-driven plate tectonics due to an increase of the subduction angle and opening of the mantle wedge. New isotopic analyses（Sm-Nd whole rock and Lu-Hf in zircon）corroborate the restricted juvenile nature of the Mineiro Belt and confirm the genetic link between the Lagoa Dourada Suite,a rare ca. 2350 Ma high-Al tonalite-trondhjemite magmatic event, and the sanukitoid-type ca. 2130 Ma Alto Maranhao Suite. U-Pb dating of zircon and titanite constrain the crystallisation history of plutonic bodies; coupled with major and trace element analyses of the host rocks, they distinguish evolutionary trends in the Mineiro Belt. Several plutons in the region have ages close to 2130 Ma but are distinguished by the lower concentration of compatible elements in the juvenile high Ba-Sr suite.

关键词： Sao Francisco craton Magmatic lull TTG-Sanukitoid transition Zircon U-Pb-Hf Titanite U-Pb Whole rock Nd isotopes

Design of active orthoses for a robotic gait rehabilitation system

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Frontiers of Mechanical Engineering 2015年第3期10卷 242-254页

作者： A. c. VILLA-PARRA L. BROcHE D. DELISLE-RODRIGUEZ R. SAGARO Y. bastos A. FRIZERA-NETO Post-Graduate Program in Electrical Engineering Universidade Federaldo Espirito Santo Vit6ria 29075-910 Brazil Grupo de Investigacion en Ingenieria Biomodica GIIB UniversidadPolitdcnica Salesiana Cuenca 010105 Ecuador Mechanical and Design Engineering Department Universidad deOriente Santiago de Cuba 90500 Cuba center of Medical Biophysics Universidad de Oriente Santiago deCuba 90500 Cuba

An active orthosis （AO） is a robotic device that assists both human gait and rehabilitation therapy. This work proposes portable AOs, one for the knee joint and another for the ankle joint. Both AOs will be used to complete a robotic system that improves gait rehabilitation. The requirements for actuator selection, the biomechanical considerations during the AO design, the finite element method, and a control approach based on electroencepha-lographic and surface electromyographic signals are reviewed. This work contributes to the design of AOs for users with foot drop and knee flexion impairment. However, the potential of the proposed AOs to be part of a robotic gait rehabilitation system that improves the quality of life of stroke survivors requires further investigation.

关键词： active orthosis gait rehabilitation,electroencephalography surface electromyography

Ultra‑Transparent and Multifunctional IZVO Mesh Electrodes for Next‑Generation Flexible Optoelectronics

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Nano-Micro Letters 2025年第1期17卷 293-309页

作者： Kiran A.Nirmal Tukaram D.Dongale Atul c.Khot chenjie Yao Nahyun Kim Tae Geun Kim School of Electrical Engineering Korea UniversityAnam‑ro 145Seongbuk‑guSeoulRepublic of Korea computational Electronics and Nanoscience Research Laboratory School of Nanoscience and BiotechnologyShivaji UniversityKolhapur 416004India

Mechanically durable transparent electrodes are essential for achieving long-term stability in flexible optoelectronic ***,they are crucial for applications in the fields of energy,display,healthcare,and soft *** meshes represent a promising alternative to traditional,brittle,metal oxide conductors due to their high electrical conductivity,optical transparency,and enhanced mechanical *** this paper,we present a simple method for fabricating an ultra-transparent conducting metal oxide mesh electrode using selfcracking-assisted *** this method,we produced an electrode with ultra-transparency(97.39%),high conductance(Rs=21.24Ωsq^(−1)),elevated work function(5.16 eV),and good mechanical *** also evaluated the effectiveness of the fabricated electrodes by integrating them into organic photovoltaics,organic light-emitting diodes,and flexible transparent memristor devices for neuromorphic computing,resulting in exceptional device *** addition,the unique porous structure of the vanadium-doped indium zinc oxide mesh electrodes provided excellent flexibility,rendering them a promising option for application in flexible optoelectronics.

关键词： Self-cracking template Vanadium-doped indium zinc oxide mesh Organic solar cells Organic light-emitting diodes Flexible transparent memory

Nutrient content affecting Spodoptera frugiperda and Dalbulus maidis occurrence in corn

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Insect Science 2007年第2期14卷 117-123页

作者： cRISTINA ScHETINO bastos JOAO cARLOS cARDOSO GALVAO MARcELO cOUTINHO PIcANcO PAULO ROBERTO GOMES PEREIRA PAULO ROBERTO cEcON EMBRAPA/Algodao Centenário Campina Grande PB Brazil Departamento de Fitotecnia Universidade Federal de Vicosa (UFV) Vicosa MG Brazil. Departamento de Biologia Animal Universidade Federal de Vicosa (UFV) Vicosa MG Brazil. Departamento de Informática Campus Universitário Universidade Federal de Vicosa (UFV) Vicosa MG Brazil.

This work aims to study the effect of the nutrient contents in the leaves of corn on the incidence of Spodopterafrugiperda （Smith）（Lepidoptera： Noctuidae） and Dalbulus maidis （Delong ＆ Wolcott）（Homoptera： cicadellidae）. The treatments were represented by unfertilized corn plants and corn plants fertilized with 250 kg of the formulation 4-14-8 （N- P-K）＋ 100 kg of ammonium sulfate （AS）/ha and 500 kg of the formulation 4-14-8 （N-P-K）＋200 kg of AS/ha, arranged in randomized blocks with four replicates. Attacks by S. frugiperda and D. maidis were higher as the nitrogen, sulfur, calcium and copper content in the leaves of corn increased. The effects of calcium and copper found in this study were not consistent with that of lower susceptibility associated with higher levels of these nutrients mentioned in the literature. We believe that there was a cumulative effect of the nutrients altogether, building up a nutritiously better vegetable which in turn had less reserve for defense, or that the content of both nutrients in the leaves were not high enough to induce such effects.

关键词： calcium copper corn cicada fall armyworm fertilization nitrogen sulfur

Queens remate despite traumatic mating in stingless bees

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current Zoology 2022年第1期68卷 81-92页

作者： Jamille costa VEIGA Gustavo Rodrigo Sanches RUIZ Gislene Almeida cARVALHO-ZILSE cristiano MENEZES Felipe Andres Leon cONTRERA Bee Biology and Ecology Lab Instituto de Ciencias BiologicasUniversidade Federal do ParaBelem66075-110 ParaBrazil Biodiversity and Ecosystem Services Research Group Instituto Tecnologico Vale-Desenvolvimento SustentavelBelem66055-090 ParaBrazil Ecology and Zoology of Invertebrates Lab Instituto de Ciencias BiologicasUniversidade Federal do ParaBelem66075-110 ParaBrazil Bee Research Group Instituto Nacional de Pesquisas da AmazoniaManaus69067-375 AmazonasBrazil Research and Development Embrapa Meio AmbienteJaguariuna13820-000 Sao PauloBrazil

Males can control female reproduction using genital plugs to impede access by *** social bees,ants,and wasps,plugging may involve traumatic mating,with females being *** stingless bees,chances are that plugs may promote ovarian activan,and are thought to ensure single mating—a general tendency among the social ***,understanding on relationships between mating plugs,traumatic mating,and mating systems in stingless bees remains *** address this,we(1)compared mated queens of 7 Neotropical species to understand the patterns of copulatory marks in females and(2)compared pre-and post-mating genitalia of males and females in Melipona fasciculata to depict plug functional *** revealed an unprecedented consequence of mating in stingless bees:the characteristic marks left by mating plugs on female abdomens and the inferences that can be made from *** our surprise,in 1 species *** we found that queens retain the plug long after mating,and may carry it for the rest of their *** the other 6 species retained the plug for only a short *** queens were only found in ***,whose multiple copulatory marks match previous findings of polyandry in this *** study shows that queens can remate,and suggests that male genital morphology may determine in part the time persistence of *** conclude that traumatic mating plugs do not fully prevent remating in stingless bees and that mating systems are not uniform in this ***,exceptional cases of facultative polyandry in social insects—for example,when mating plugs fail—may confirm a general tendency for single mating in close link with efficient mating plugs.

关键词： copulatory marks facultative polyandry genital morphology male harm sexual conflict

Effect of metallic nanoparticles on amyloid fibrils and their influence to neural cell toxicity

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Nano Research 2020年第4期13卷 1081-1089页

作者： Marianna Barbalinardo Andrea Antosova Marta Gambucci Zuzana Bednarikova cristiano Albonetti Francesco Valle Paola Sassi Loredana Latterini(ISI) Zuzana Gazova Eva Bystrenova c.N.R.-I.S.M.N via gobetti101bologna 40129italy Institute of experimental physics department of biophysicsslovak academy of sciencewatsonova 4704001kosiceslovakia department of chemistry biology and biotechnologyuniversity of perugiaperugia 06123italy consorzio interuniversitario per lo sviluppo dei sistemi a grande interfase(csgi) ismn-cnrbologna 40129italy department of medical and clinical biochemistry faculty of medicinesafarik universitykosice 04001slovakia

The modification of amyloid fibrils cytotoxicity through exogenous nanomaterials is crucial to understand the processes controlling the role of protein aggregation in the related *** influence of nanoparticles on amyloid stability yields great interest due to the small size and high surface area-to-volume ratio of *** physico-chemical parameters play a role in the interaction of proteins and nanoparticles in solution,thus influencing the disaggregation of preformed *** have examined the influence of two kinds of metallic nanoparticles on lysozyme amyloid fibrils using a multi-technique approach and focalized their impact on cytotoxicity on human neuroblastoma cells(SH-SY5Y).In particular,fluorescence,infrared and circular dichroism spectroscopies,optical and atomic force microscopy experiments have been carried out;the results are analyzed to rationalize the effects of these complexes on neural cell *** is remarkable,that the fibrils in the presence of AuNPs,unlike fibrils alone or with AgNPs,do not generate a significant cytotoxic effect even at high concentration and an amyloid degradation effect is visible.

关键词： lysozyme amyloid fibrils nanoparticles spectroscopy toxicity

Tension-free Dirac strings and steered magnetic charges in 3D artificial spin ice

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npj computational Materials 2021年第1期7卷 1127-1134页

作者： Sabri Koraltan Florian Slanovc Florian Bruckner cristiano Nisoli Andrii V.chumak Oleksandr V.Dobrovolskiy claas Abert Dieter Suess Physics of Functional Materials Faculty of PhysicsUniversity of ViennaViennaAustria Theoretical Division Los Alamos National LaboratoryLos AlamosNMUSA Nanomagnetics and Magnonics Faculty of PhysicsUniversity of ViennaViennaAustria Research Platform MMM Mathematics-Magnetism-Materials University of ViennaViennaAustria

3D nano-architectures presents a new paradigm in modern condensed matter physics with numerous applications in photonics,biomedicine,and *** are promising for the realization of 3D magnetic nano-networks for ultra-fast and low-energy data *** in these systems can lead to magnetic charges or magnetic monopoles,which can function as mobile,binary information ***,Dirac strings in 2D artificial spin ices bind magnetic charges,while 3D dipolar counterparts require cryogenic temperatures for their ***,we present a micromagnetic study of a highly frustrated 3D artificial spin ice harboring tension-free Dirac strings with unbound magnetic charges at room *** use micromagnetic simulations to demonstrate that the mobility threshold for magnetic charges is by 2 eV lower than their unbinding *** applying global magnetic fields,we steer magnetic charges in a given direction omitting unintended *** introduced system paves the way toward 3D magnetic networks for data transport and storage.

关键词： stability magnetic artificial

Gridded 20-year climate parameterization of Africa and South America for a stochastic weather generator (cLIGEN)

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Big Earth Data 2023年第2期7卷 349-374页

作者： Andrew Fullhart Guillermo E.Ponce-campos Menberu B.Meles Ryan P.McGehee Gerardo Armendariz Paulo Tarso S.Oliveira cristiano Das Neves Almeida José c.de Araújo Werner Nel David c.Goodrich Southwest Watershed Research center USDA-ARS TucsonAZUSA School of Natural Resources and the Environment University of ArizonaTucsonAZUSA Sustainable Agricultural Water Systems Unit USDA-ARS DavisCAUSA Agricultural and Biological Engineering Purdue UniversityWest LafayetteINUSA Faculty of Engineering Architecture and Urbanism and GeographyFederal University of Mato Grosso do Sul(UFMS)Campo GrandeMSBrazil Water Resources and Environmental Engineering Laboratory Federal University of ParaíbaJoao PessoaPBBrazil Federal University of Fortaleza Department of Agricultural EngineeringFortalezaBrazil Department of Geography and Environmental Science University of Fort HareAliceSouth Africa

cLIGEN is a stochastic weather generator that creates statistically representative timeseries of daily and sub-daily point-scale weather variables from observed monthly statistics and other parameters. cLIGEN precipitation timeseries are used as climate input for various risk-assessment modelling applications as an alternative to observe long-term, high temporal resolution records. Here, we queried gridded global climate datasets (Terraclimate, ERA5, GPM-IMERG, and GLDAS) to estimate various 20-year climate statistics and obtain complete cLIGEN input parameter sets with coverage of the African and South American continents at 0.25 arc degree resolution. The estimation of cLIGEN precipitation parameters was informed by a ground-based dataset of >10,000 locations worldwide. The ground observations provided target values to fit regression models that downscale cLIGEN precipitation input parameters. Aside from precipitation parameters, cLIGEN’s parameters for temperature, solar radiation, etc. were in most cases directly calculated according to the original global datasets. cross-validation for estimated precipitation parameters quantified errors that resulted from applying the estimation approach in a predictive fashion. Based on all training data, the RMSE was 2.23 mm for the estimated monthly average single-event accumulation and 4.70 mm/hr for monthly maximum 30-min intensity. This dataset facilitates exploration of hydrological and soil erosional hypotheses across Africa and South America.

关键词： climate cLIGEN Africa South America

3-Phase hierarchical graphene-based epoxy nanocomposite laminates for automotive applications

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Journal of Materials Science & Technology 2019年第10期35卷 2169-2177页

作者： Ahmed Elmarakbi Panagiotis Karagiannidis Alessandra ciappa Franco Innocente Francesco Galise Brunetto Martorana Francesco Bertocchi Francesco cristiano Elvira Villaro Abalos Julio Gomez Department of Mechanical and construction Engineering Faculty of Engineering and EnvironmentNorthumbria UniversityNewcastleNE18STUnited Kingdom School of Engineering Faculty of TechnologyUniversity of SunderlandSunderlandSR6 ODDUnited Kingdom Delta-Tech S.pA. localita Rifoglieto 60/a-int.155011AltopascioLUItaly Fiat Research center via ex Aeroporto80038 Pomigliano d'ArcoNaplesItaly Nanesa srl.Via Del Gavardello 59/c 52100 ArezzoARItaly Instituto de Tecnologfas Quimicas Emergences de La Rioja Antonio de Nebrija826006 LogronoSpain Avanzare Innovacion Tecnologica S.L Avda.Lentiscares 4-626370 NavarreteSpain

Two different types of graphene flakes were produced following solution processing methods and dispersed using shear mixing in a bifunctional(A) and a multifunctional(B) epoxy resin at a concentration of 0.8 and 0.6 wt%, respectively. The graphene/epoxy resin mixtures were used to impregnate unidirectional carbon fibre tapes. These prepregs were stacked(seven plies) and cured to produce *** interlaminar fracture toughness(mode-I) of the carbon fiber/graphene epoxy laminates with resin B showed over 56% improvement compared with the laminate without graphene. Single lap joints were prepared using the laminates as adherents and polyurethane adhesives(Sika 7666 and Sika 7888). The addition of graphene improved considerably the adhesion strength from 3.3 to 21 MPa(sample prepared with resin A and Sika 7888) highlighting the potential of graphene as a secondary filler in carbon fibre reinforced polymer composites.

关键词： Graphene carbon fibre reinforced polymer(cFRP) Fracture toughness Shear lap joints