Results 51 to 60 of about 20,267 (205)

Tuning the Electronic Structure and Spin State of Fe─N─C Catalysts Using an Axial Oxygen Ligand and Fe Clusters for High‐Efficiency Rechargeable Zinc–Air Batteries

open access: yesAdvanced Functional Materials, EarlyView.
A FeN4─O/Clu@NC‐0.1Ac catalyst containing atomically‐dispersed FeN4─O sites (medium‐spin Fe2+) and Fe clusters delivered a half‐wave potential of 0.89 V for ORR and an overpotential of 330 mV at 10 mA cm−2 for OER in 0.1 m KOH. When the catalyst was used in a rechargeable Zn–air battery, a power density of 284.5 mW cm−2 was achieved with excellent ...
Yongfang Zhou   +8 more
wiley   +1 more source

COVID-19 and the increased risk of myopia and digital eye strain. [PDF]

open access: yesEinstein (Sao Paulo), 2021
Desideri LF, Tovani-Palone MR.
europepmc   +1 more source

Espectro de luz solar: do infravermelho ao ultravioleta [PDF]

open access: yes, 2018
Desde as primeiras civilizações, a humanidade observa o céu e estuda os fenômenos procurando entender a origem e a evolução do Universo. A Astronomia como conteúdo integrante das Ciências Naturais e seu caráter multidisciplinar, permite desenvolver o ...
Crivelari, Andressa Marlise de Souza   +2 more
core  

Das competências de uso das tecnologias digitais ao exercício pleno da cidadania digital: os casos do Alentejo e do País Basco [PDF]

open access: yes, 2019
O Vol 2 (1) 2019 é dedicado à problemática das Competências Digitais.A participação informada nos processos de decisão coletiva exige melhores níveis educacionais, um leque mais amplo de competências digitais e, naturalmente, o acesso às ...
Aires, Luísa   +2 more
core   +1 more source

Selection Strategies for Flexible Pressure Sensor Electrode Materials Toward Ultrafast Response

open access: yesAdvanced Functional Materials, EarlyView.
This study reveals, for the first time, how the electrode–organic interface governs the temporal performance of flexible pressure sensors. By pairing high‐conductivity CVD PEDOT with commonly used metal electrodes, the authors demonstrate that interfacial energy alignment dictates microsecond‐scale response, providing a straightforward design strategy ...
Jinwook Baek   +11 more
wiley   +1 more source

Robust and Reversible Thermofluorescence in Solvent‐Free Thermoplastic Polyurethane Composites

open access: yesAdvanced Functional Materials, EarlyView.
Thermofluorescent polymer composites with high‐contrast optical outputs are prepared by solvent‐free blending of indenoquinacridone dye into a thermoplastic polyurethane matrix. The temperature‐dependent fluorescence originates from aggregation–dissociation of the dye molecules, regulated by competing hydrogen bonds from the polymer matrix.
Guanghua Yu   +8 more
wiley   +1 more source

Controlled Movement of Soft Actuators using Multi‐Responsive Microgel Arrays and Microcirculatory Systems

open access: yesAdvanced Functional Materials, EarlyView.
Microscale hydrogels (microgels) feature improved mass transport characteristics supportive of fast actuation and chemical tunability amenable to programmed stimuli response. A unique soft actuator architecture is realized by encapsulating microgels in soft microcirculatory systems which enable the convenient delivery of liquid stimuli for powering and
Nengjian Huang   +2 more
wiley   +1 more source

Evolució de la producció multimèdia a la xarxa : del model editorial al model interactiu [PDF]

open access: yes, 2002
La popularització d'Internet va començar l'any 1991 amb l'aparició dels primers navegadors gràfics, els quals van permetre l'accés a la informació de la Xarxa sense haver de conèixer les ordres específiques per moure's pels entramats hipertextuals. Així,
Ribes Guàrdia, Francesc Xavier
core   +1 more source

Adaptive 4D‐Printed Vascular Stents With Low‐Temperature‐Activated and Intelligent Deployment

open access: yesAdvanced Functional Materials, EarlyView.
Microarchitected coronary artery stents were fabricated using a polycaprolactone (PCL)‐based shape memory polymer (SMP) composite via projection micro‐stereolithography (PµSL) 4D printing. By incorporating diethyl phthalate (DEP) as a plasticizer, the thermal transition temperature (Ttran) was modulated to about 37°C, enabling rapid and autonomous ...
Yannan Li   +12 more
wiley   +1 more source

The comic and its relationship with art in frames [PDF]

open access: yes, 2019
Esta comunicación se centra en el cómic y su relación con la fotografía. Proponemos analizar el lenguaje de la fotonovela como un formato transmedia entre el cómic, el cine, la instalación y el vídeo arte.
Martínez-Silvente, María Jesús   +1 more
core  

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