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With pore sizes up to 100 nm, the term "nanoporous" covers a wide range of material classes. A broad field of applications has arisen from the diversity of unique structures and properties of nanoporous materials. Recent research spans the range from fundamental studies of the behavior of atoms and molecules in confined space, creative synthetic pathways for novel materials, to applications in high-performance technologies. This Special Issue collects current studies about the progress in the development, characterization, and application of nanoporous materials, including (but not restricted to) mesoporous silica, carbon and metal oxides, porous coordination polymers, metal organic frameworks (MOFs), and covalent organic frameworks (COFs), as well as materials exhibiting hierarchical porosity. Their functionalities show promise for fields such as energy storage/conversion (e.g., photocatalysis and battery electrodes), sensing, catalysis, and their sorption properties for N2, CO2, NOx, or H2O, to name just a few.

History of engineering & technology --- mesoporous silica --- organocatalysis --- host–guest materials --- magic-angle spinning NMR (MAS-NMR) --- nanoporous metal foam --- nanoshell --- buckling --- free vibration --- strain gradient theory --- first-order shear deformation theory --- SERS --- near-infrared --- crystal silicon photoluminescence --- porous silicon photonic crystals --- hot-spots --- mesoporous films --- direct growth --- esterification --- material formation --- porous organic polymers --- amine modification --- CO2 separation --- adsorption mechanism --- chemisorption of CO2 --- Birnessite --- nanoporous metal oxides --- impedance spectroscopy --- perovskite solar cell --- electron selective layer --- pinhole --- mesoporous TiO2 --- evaporation-induced self-assembly --- dip coating --- n/a --- host-guest materials

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The inverse dynamics problem was developed in order to provide researchers with the state of the art in inverse problems for dynamic and vibrational systems. Contrasted with a forward problem, which solves for the system output in a straightforward manner, an inverse problem searches for the system input through a procedure contaminated with errors and uncertainties. An inverse problem, with a focus on structural dynamics, determines the changes made to the system and estimates the inputs, including forces and moments, to the system, utilizing measurements of structural vibration responses only. With its complex mathematical structure and need for more reliable input estimations, the inverse problem is still a fundamental subject of research among mathematicians and engineering scientists. This book contains 11 articles that touch upon various aspects of inverse dynamic problems.

Technology: general issues --- regenerative shock absorbers --- energy harvesting --- active control of automobile suspension systems --- railroad tracks --- track modulus --- computer simulation --- artificial neural networks --- Fiber-reinforced Foamed Urethane (FFU) --- free vibration --- impact hammer excitation technique --- high-rate dynamics --- structural health monitoring --- time-frequency analysis --- synchrosqueezing transform (SST) --- jerk --- acceleration onset --- higher-order derivatives of acceleration --- jounce --- acceleration-dot --- sports surfacing --- sand surface --- dynamic behaviour --- impact tests --- accelerometry --- greyhound racing --- equine racing --- shake table control --- vibration testing --- system identification --- inverse dynamics --- feedback linearization --- servohydraulics --- inverse problems --- quantum graphs --- delta-prime vertex conditions --- Bayesian inference --- uncertainty quantification --- dynamical systems --- inverse problem --- machine learning --- Gaussian process --- polynomial chaos --- impact force identification --- tower structure --- impact localization --- force history --- inverse algorithm --- rotor dynamic --- bearing --- centrifugal pump --- impeller diameter --- Lagrangian equations --- regenerative shock absorbers --- energy harvesting --- active control of automobile suspension systems --- railroad tracks --- track modulus --- computer simulation --- artificial neural networks --- Fiber-reinforced Foamed Urethane (FFU) --- free vibration --- impact hammer excitation technique --- high-rate dynamics --- structural health monitoring --- time-frequency analysis --- synchrosqueezing transform (SST) --- jerk --- acceleration onset --- higher-order derivatives of acceleration --- jounce --- acceleration-dot --- sports surfacing --- sand surface --- dynamic behaviour --- impact tests --- accelerometry --- greyhound racing --- equine racing --- shake table control --- vibration testing --- system identification --- inverse dynamics --- feedback linearization --- servohydraulics --- inverse problems --- quantum graphs --- delta-prime vertex conditions --- Bayesian inference --- uncertainty quantification --- dynamical systems --- inverse problem --- machine learning --- Gaussian process --- polynomial chaos --- impact force identification --- tower structure --- impact localization --- force history --- inverse algorithm --- rotor dynamic --- bearing --- centrifugal pump --- impeller diameter --- Lagrangian equations

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For this reprint, we intend to cover theoretical as well as experimental works performed on small scale to predict the material properties and characteristics of any advanced and metamaterials. New studies on mechanics of small-scale structures such as MEMS/NEMS, carbon and non-carbon nanotubes (e.g., CNTs, Carbon nitride, and Boron nitride nanotubes), micro/nano-sensors, nanocomposites, macrocomposites reinforced by micro-/nano-fillers (e.g., graphene platelets), etc., are included in this reprint.

Technology: general issues --- History of engineering & technology --- carbon nanotube-reinforced composite --- forced vibration --- dynamic analysis --- beam --- harmonic load --- assembly --- metal-organic frameworks --- hydrogen evolution reaction --- Cu2−xS --- interfacial interaction --- conducting carbon black network --- mechanical property --- electromagnetic interference shielding --- CNT --- elastic foundations --- nonlinear free vibration --- nonlinear frequency --- shallow shell structures --- hyperelastic micro/nanobeam --- extended modified couple stress theory --- strain-stiffening effect --- nonlinear frequency response --- functionally graded material --- thermoelasticity --- sliding contact --- wear --- heating from friction --- thermoelastic instability --- wood --- nano-, micro-, meso-, and macro-structure --- multiscale mechanical properties --- size effects --- Hall-Petch law --- dendrochronology --- surface bonding --- nanoporous graphene --- atomic force microscopy --- hyperelastic microcantilever --- softening resonance --- non-contact cantilever --- shooting and arc-length continuation method --- developed Galerkin method --- graphene nanoplatelets --- recycle carbon fibers --- air nanobubbles --- cement-based composites and nanocomposites --- mechanical properties --- electrical properties

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With the progress in nanotechnology and associated production methods, composite materials are becoming lighter, cheaper, more durable, and more versatile. At present, great progress has been made in the design, preparation, and characterization of composite materials, making them smarter and versatile. By creating new properties using suitable fillers and matrix, functional composites can meet the most challenging standards of users, especially in high-tech industries. Advanced composites reinforced by high-performance carbon fibers and nanofillers are popular in the automotive and aerospace industries thanks to their significant advantages, such as high specific strength to weight ratio and noncorrosion properties. In addition to the improvement of the mechanical performance, composite materials today are designed to provide new functions dealing with antibacterial, self-cleaning, self-healing, super-hard, and solar reflective properties for desired end-use applications. On the other hand, composite materials can contribute to mitigating environmental issues by providing renewable energy technologies in conjunction with multifunctional, lightweight energy storage systems with high performance and noncorrosive properties. They are also used to prepare a new generation of batteries and directly contribute to H2 production or CO2 reduction in fuels and chemicals. This Special Issue aims to collect articles reporting on recent developments dealing with preparative methods, design, properties, structure, and characterization methods as well as promising applications of multifunctional composites. It covers potential applications in various areas, such as anticorrosion, photocatalyst, absorbers, superhydrophobic, self-cleaning, antifouling/antibacterial, renewable energy, energy storage systems, construction, and electronics. The modeling and simulation of processes involving the design and preparation of functional and multifunctional composites as well as experimental studies involving these composites are all covered in this Special Issue.

History of engineering & technology --- CuO/ZnO --- photodegradation --- nanocomposite --- methylene blue --- sunlight --- photocatalyst --- dye degradation --- co-precipitation --- free vibration analysis --- doubly-curved shell and panel --- nano-composites --- functionally graded carbon nanotube-reinforced composite (FG-CNTRC) --- four-variable refined shell theory --- 3D printing --- FDM method --- bronze polylactic acid composite --- response surface method --- acrylic polyurethane coating --- nano-SiO2 --- mechanical properties --- weathering resistance --- poly (lactic acid) --- pulp fiber --- natural fiber reinforced composites --- epoxidized Tung oil --- carbon/carbon composites --- multi-phase coatings --- oxidation resistance --- thermal cycling --- 3D printed coating --- multi-material additive manufacturing --- environmental exposure --- ABS --- ASA --- composites --- chitosan–pectin --- adsorption --- polyelectrolyte complex --- covalent biopolymer framework --- strawberry --- edible coating --- cut fruits --- post-harvest --- storage --- quality --- milk composition --- multiphase polydisperse system --- near-infrared spectroscopy --- mid-infrared spectroscopy --- Raman spectroscopy --- milk optical and acoustical properties --- milk spectral analysis --- speed of sound --- attenuation --- ultrasonic techniques --- n/a --- annealing time --- crystallize process --- molecular dynamics --- NiAu alloy --- structure --- chitosan-pectin

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The inverse dynamics problem was developed in order to provide researchers with the state of the art in inverse problems for dynamic and vibrational systems. Contrasted with a forward problem, which solves for the system output in a straightforward manner, an inverse problem searches for the system input through a procedure contaminated with errors and uncertainties. An inverse problem, with a focus on structural dynamics, determines the changes made to the system and estimates the inputs, including forces and moments, to the system, utilizing measurements of structural vibration responses only. With its complex mathematical structure and need for more reliable input estimations, the inverse problem is still a fundamental subject of research among mathematicians and engineering scientists. This book contains 11 articles that touch upon various aspects of inverse dynamic problems.

regenerative shock absorbers --- energy harvesting --- active control of automobile suspension systems --- railroad tracks --- track modulus --- computer simulation --- artificial neural networks --- Fiber-reinforced Foamed Urethane (FFU) --- free vibration --- impact hammer excitation technique --- high-rate dynamics --- structural health monitoring --- time-frequency analysis --- synchrosqueezing transform (SST) --- jerk --- acceleration onset --- higher-order derivatives of acceleration --- jounce --- acceleration-dot --- sports surfacing --- sand surface --- dynamic behaviour --- impact tests --- accelerometry --- greyhound racing --- equine racing --- shake table control --- vibration testing --- system identification --- inverse dynamics --- feedback linearization --- servohydraulics --- inverse problems --- quantum graphs --- delta-prime vertex conditions --- Bayesian inference --- uncertainty quantification --- dynamical systems --- inverse problem --- machine learning --- Gaussian process --- polynomial chaos --- impact force identification --- tower structure --- impact localization --- force history --- inverse algorithm --- rotor dynamic --- bearing --- centrifugal pump --- impeller diameter --- Lagrangian equations --- n/a