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The Special Issue contains ten research papers, three of which review papers. It is a miscellaneous composition encompassing several applications where metal oxides play a key role. Some papers also give insights into novel synthesis methods and processes aiming to reduce negative environmental impacts and increase materials and process efficiency, thus also covering a broader concern of sustainability issues. The topics covered in this issues are: transparent conductive oxides, ceramic composites for tool applications, oxides nanoparticles for A-TIG welding, critical raw materials saving, metallurgical waste treatment, oxides for high temperature applications, nanostructured oxides and composites for gas sensing and desulfuration, and metal oxides sorbents for CO2 capture.

History of engineering & technology --- indium tin oxide (ITO) --- invar metal substrate --- curved perovskite solar cells --- flexibility --- reflectance --- electrode --- RHF --- deposition --- KCl --- ZnFe2O4 --- cohering mechanism --- oxide coating --- nanoparticles --- TIG welding --- penetration depth --- hard facing --- cobalt alloys --- wear --- nano-particle coating --- A-TIG welding --- particle size --- metal flow --- alumina–zirconia composites --- TiC --- TiN --- spark plasma sintering --- wear resistance --- indentation fracture toughness --- X-ray diffraction --- WO3 --- ionic liquids --- gas sensor --- pollutant gases --- desulfurization --- In doped ZnO --- bibliometric analysis --- thin films --- metal oxides --- zirconia --- rare earth zirconates --- thermal barrier coatings --- microstructure characterization --- thermal shock resistance --- CO2 capture --- calcium looping --- nanometric CaZrO3 particles --- n/a --- alumina-zirconia composites

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Microelectrode arrays are increasingly used in a wide variety of situations in the medical device sector. For example, one major challenge in microfluidic devices is the manipulation of fluids and droplets effectively at such scales. Due to the laminar flow regime (i.e., low Reynolds number) in microfluidic devices, the mixing of species is also difficult, and unless an active mixing strategy is employed, passive diffusion is the only mechanism that causes the fluid to mix. For many applications, diffusion is considered too slow, and thus many active pumping and mixing strategies have been employed using electrokinetic methods, which utilize a variety of simple and complex microelectrode array structures. Microelectrodes have also been implemented in in vitro intracellular delivery platforms to conduct cell electroporation on chip, where a highly localized electric field on the scale of a single cell is generated to enhance the uptake of extracellular material. In addition, microelectrode arrays are utilized in different microfluidic biosensing modalities, where a higher sensitivity, selectivity, and limit-of-detection are desired. Carbon nanotube microelectrode arrays are used for DNA detection, multi-electrode array chips are used for drug discovery, and there has been an explosion of research into brain–machine interfaces, fueled by microfabricated electrode arrays, both planar and three-dimensional. The advantages associated with microelectrode arrays include small size, the ability to manufacture repeatedly and reliably tens to thousands of micro-electrodes on both rigid and flexible substrates, and their utility for both in vitro and in vivo applications. To realize their full potential, there is a need to develop and integrate microelectrode arrays to form useful medical device systems. As the field of microelectrode array research is wide, and touches many application areas, it is often difficult to locate a single source of relevant information. This Special Issue seeks to showcase research papers, short communications, and review articles, that focus on the application of microelectrode arrays in the medical device sector. Particular interest will be paid to innovative application areas that can improve existing medical devices, such as for neuromodulation and real world lab-on-a-chip applications.

electrothermal --- microelectrode --- microfluidics --- micromixing --- micropump --- alternating current (AC) electrokinetics --- bisphenol A --- self-assembly --- biosensor --- flexible electrode --- polydimethylsiloxane (PDMS) --- pyramid array micro-structures --- low contact impedance --- multimodal laser micromachining --- ablation characteristics --- shadow mask --- interdigitated electrodes --- soft sensors --- liquid metal --- fabrication --- principle --- arrays --- application --- induced-charge electrokinetic phenomenon --- ego-dielectrophoresis --- mobile electrode --- Janus microsphere --- continuous biomolecule collection --- electroconvection --- microelectrode array (MEA) --- ion beam assisted electron beam deposition (IBAD) --- indium tin oxide (ITO) --- titanium nitride (TiN) --- neurons --- transparent --- islets of Langerhans --- insulin secretion --- glucose stimulated insulin response --- electrochemical transduction --- intracortical microelectrode arrays --- shape memory polymer --- softening --- robust --- brain tissue oxygen --- in vivo monitoring --- multi-site clinical depth electrode --- n/a

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The Special Issue contains ten research papers, three of which review papers. It is a miscellaneous composition encompassing several applications where metal oxides play a key role. Some papers also give insights into novel synthesis methods and processes aiming to reduce negative environmental impacts and increase materials and process efficiency, thus also covering a broader concern of sustainability issues. The topics covered in this issues are: transparent conductive oxides, ceramic composites for tool applications, oxides nanoparticles for A-TIG welding, critical raw materials saving, metallurgical waste treatment, oxides for high temperature applications, nanostructured oxides and composites for gas sensing and desulfuration, and metal oxides sorbents for CO2 capture.

History of engineering & technology --- indium tin oxide (ITO) --- invar metal substrate --- curved perovskite solar cells --- flexibility --- reflectance --- electrode --- RHF --- deposition --- KCl --- ZnFe2O4 --- cohering mechanism --- oxide coating --- nanoparticles --- TIG welding --- penetration depth --- hard facing --- cobalt alloys --- wear --- nano-particle coating --- A-TIG welding --- particle size --- metal flow --- alumina-zirconia composites --- TiC --- TiN --- spark plasma sintering --- wear resistance --- indentation fracture toughness --- X-ray diffraction --- WO3 --- ionic liquids --- gas sensor --- pollutant gases --- desulfurization --- In doped ZnO --- bibliometric analysis --- thin films --- metal oxides --- zirconia --- rare earth zirconates --- thermal barrier coatings --- microstructure characterization --- thermal shock resistance --- CO2 capture --- calcium looping --- nanometric CaZrO3 particles --- indium tin oxide (ITO) --- invar metal substrate --- curved perovskite solar cells --- flexibility --- reflectance --- electrode --- RHF --- deposition --- KCl --- ZnFe2O4 --- cohering mechanism --- oxide coating --- nanoparticles --- TIG welding --- penetration depth --- hard facing --- cobalt alloys --- wear --- nano-particle coating --- A-TIG welding --- particle size --- metal flow --- alumina-zirconia composites --- TiC --- TiN --- spark plasma sintering --- wear resistance --- indentation fracture toughness --- X-ray diffraction --- WO3 --- ionic liquids --- gas sensor --- pollutant gases --- desulfurization --- In doped ZnO --- bibliometric analysis --- thin films --- metal oxides --- zirconia --- rare earth zirconates --- thermal barrier coatings --- microstructure characterization --- thermal shock resistance --- CO2 capture --- calcium looping --- nanometric CaZrO3 particles

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The aim of this book is to highlight some recent advances in microwave planar devices. The development of planar technologies still generates great interest because of their many applications in fields as diverse as wireless communications, medical instrumentation, remote sensing, etc. In this book, particular interest has been focused on an electronically controllable phase shifter, wireless sensing, a multiband textile antenna, a MIMO antenna in microstrip technology, a miniaturized spoof plasmonic antipodal Vivaldi antenna, a dual-band balanced bandpass filter, glide-symmetric structures, a transparent multiband antenna for vehicle communications, a multilayer bandpass filter with high selectivity, microwave planar cutoff probes, and a wideband transition from microstrip to ridge empty substrate integrated waveguide.

Technology: general issues --- History of engineering & technology --- microwave tunable phase shifters --- 3 dB/90° coupler --- K band --- HD --- MSP --- RF --- SVM --- wireless sensing technology --- antenna design --- constrained optimization problems --- coral reefs optimization algorithm --- meta-heuristics --- antenna --- MIMO --- octagonal --- planar --- UWB --- vivaldi antenna --- miniaturized --- high gain --- surface plasmons --- ultrawideband --- microwave sensor --- differential sensor --- dielectric characterization --- microfluidics --- electrically small resonators --- biosensors --- dual-band differential filter --- common-mode suppression --- magnetic coupling --- multilayer structure --- glide symmetry --- higher symmetries --- Maxwell fish-eye lens --- metasurface --- periodic structures --- printed circuit board --- coplanar waveguides --- vehicular networks --- IEEE 802.11p --- indium-tin oxide (ITO) --- transparent antenna --- bandpass filter --- discriminating coupling --- high selectivity --- source-load coupling --- plasma diagnostics --- electron density measurement --- planar microwave cutoff probe --- bar-type cutoff probe --- ring-type cutoff probe --- computational characterization --- substrate integrated waveguide --- ridge waveguide --- tapering structure --- broadband --- microwave devices --- n/a

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• Reference Manager
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The aim of this book is to highlight some recent advances in microwave planar devices. The development of planar technologies still generates great interest because of their many applications in fields as diverse as wireless communications, medical instrumentation, remote sensing, etc. In this book, particular interest has been focused on an electronically controllable phase shifter, wireless sensing, a multiband textile antenna, a MIMO antenna in microstrip technology, a miniaturized spoof plasmonic antipodal Vivaldi antenna, a dual-band balanced bandpass filter, glide-symmetric structures, a transparent multiband antenna for vehicle communications, a multilayer bandpass filter with high selectivity, microwave planar cutoff probes, and a wideband transition from microstrip to ridge empty substrate integrated waveguide.

Technology: general issues --- History of engineering & technology --- microwave tunable phase shifters --- 3 dB/90° coupler --- K band --- HD --- MSP --- RF --- SVM --- wireless sensing technology --- antenna design --- constrained optimization problems --- coral reefs optimization algorithm --- meta-heuristics --- antenna --- MIMO --- octagonal --- planar --- UWB --- vivaldi antenna --- miniaturized --- high gain --- surface plasmons --- ultrawideband --- microwave sensor --- differential sensor --- dielectric characterization --- microfluidics --- electrically small resonators --- biosensors --- dual-band differential filter --- common-mode suppression --- magnetic coupling --- multilayer structure --- glide symmetry --- higher symmetries --- Maxwell fish-eye lens --- metasurface --- periodic structures --- printed circuit board --- coplanar waveguides --- vehicular networks --- IEEE 802.11p --- indium-tin oxide (ITO) --- transparent antenna --- bandpass filter --- discriminating coupling --- high selectivity --- source-load coupling --- plasma diagnostics --- electron density measurement --- planar microwave cutoff probe --- bar-type cutoff probe --- ring-type cutoff probe --- computational characterization --- substrate integrated waveguide --- ridge waveguide --- tapering structure --- broadband --- microwave devices --- microwave tunable phase shifters --- 3 dB/90° coupler --- K band --- HD --- MSP --- RF --- SVM --- wireless sensing technology --- antenna design --- constrained optimization problems --- coral reefs optimization algorithm --- meta-heuristics --- antenna --- MIMO --- octagonal --- planar --- UWB --- vivaldi antenna --- miniaturized --- high gain --- surface plasmons --- ultrawideband --- microwave sensor --- differential sensor --- dielectric characterization --- microfluidics --- electrically small resonators --- biosensors --- dual-band differential filter --- common-mode suppression --- magnetic coupling --- multilayer structure --- glide symmetry --- higher symmetries --- Maxwell fish-eye lens --- metasurface --- periodic structures --- printed circuit board --- coplanar waveguides --- vehicular networks --- IEEE 802.11p --- indium-tin oxide (ITO) --- transparent antenna --- bandpass filter --- discriminating coupling --- high selectivity --- source-load coupling --- plasma diagnostics --- electron density measurement --- planar microwave cutoff probe --- bar-type cutoff probe --- ring-type cutoff probe --- computational characterization --- substrate integrated waveguide --- ridge waveguide --- tapering structure --- broadband --- microwave devices