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Harvester ants. --- Harvester ants --- Invertebrates & Protozoa --- Zoology --- Health & Biological Sciences --- Agricultural ants --- Pogomyrmex --- Pogonomyrmex --- Ants

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Energy harvesting is the conversion of unused or wasted energy in the ambient environment into useful electrical energy. It can be used to power small electronic systems such as wireless sensors and is beginning to enable the widespread and maintenance-free deployment of Internet of Things (IoT) technology. This Special Issue is a collection of the latest developments in both fundamental research and system-level integration. This Special Issue features two review papers, covering two of the hottest research topics in the area of energy harvesting: 3D-printed energy harvesting and triboelectric nanogenerators (TENGs). These papers provide a comprehensive survey of their respective research area, highlight the advantages of the technologies and point out challenges in future development. They are must-read papers for those who are active in these areas. This Special Issue also includes ten research papers covering a wide range of energy-harvesting techniques, including electromagnetic and piezoelectric wideband vibration, wind, current-carrying conductors, thermoelectric and solar energy harvesting, etc. Not only are the foundations of these novel energy-harvesting techniques investigated, but the numerical models, power-conditioning circuitry and real-world applications of these novel energy harvesting techniques are also presented.

piezoelectric harvester --- orthoplanar spring --- trapezoidal leg --- vibration energy --- acoustic resonance --- closed side branch --- DDES --- wind energy harvester --- Autonomous Internet of Things --- vibration energy harvesting --- electromagnetic–mechanical modeling --- autonomous sensors --- self-powered device --- battery-less modules --- energy harvesting --- Wiegand sensor --- self-oscillating boost converter --- power management --- connected vehicles --- smart cities --- electric vehicle --- IoT --- Tesla --- triboelectric nanogenerators --- ocean wave --- artificial intelligence --- structural health monitoring --- TEG --- thermoelectricity --- thermal energy harvesting --- tracker --- wildlife --- animal --- ultra low power --- 3D printed --- vibration harvester --- electromagnetic --- hybrid --- photovoltaics --- solar panel --- highway --- urban street --- experimental investigation --- water --- solar still --- absorber --- silicon --- temperature --- dual resonance frequencies --- vibration electromagnetic energy harvester --- wide harvested frequency range --- enhanced “band-pass” harvested power --- independent resonant frequencies --- autonomous wireless sensor --- passive energy management --- weak vibration --- electromagnetic converter --- wideband --- planar spring --- voltage multiplier --- rectifier --- predictive maintenance --- failure detection --- WSN --- n/a --- electromagnetic-mechanical modeling --- enhanced "band-pass" harvested power

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Kinetic energy harvesters are a viable means of supplying low-power autonomous electronic systems for the remote sensing of operations. In this Special Issue, through twelve diverse contributions, some of the contemporary challenges, solutions and insights around the outlined issues are captured describing a variety of energy harvesting sources, as well as the need to create numerical and experimental evidence based around them. The breadth and interdisciplinarity of the sector are clearly observed, providing the basis for the development of new sensors, methods of measurement, and importantly, for their potential applications in a wide range of technical sectors.

energy harvester --- electromagnetic --- real vibration --- nonlinearities --- piezoelectric energy harvesting --- triboelectric energy harvesting --- low-frequency vibration energy harvesting --- direct-force generator --- vibration --- frequency-up conversion --- PVDF patches --- structural health monitoring --- sensing --- energy harvesting --- pipe leak detection --- computational fluid dynamics --- optimum sensor distribution --- electromagnetic energy harvester --- bi-stable oscillator --- load resistance optimization --- frequency response analysis --- harmonic balance method --- piezoelectric --- piezoelectric ceramic --- lead zirconate titanate (PZT) --- polyvinylidene fluoride (PVDF) --- efficiency --- efficiency measurement --- power conversion --- power flow --- vibrations --- analytical model --- beam model --- equivalent model --- power prediction --- Structural Health Monitoring --- damage detection --- macro fiber composites (MFC) --- damage sensitive feature --- finite element method (FEM) --- vibration energy-harvesting system --- hysteretic effect --- bistable oscillator --- bifurcation --- train --- electromagnetic transducer --- model --- test --- wireless sensor --- SMART materials --- magnetostriction --- Terfenol-D --- smart materials --- wireless sensors --- ultrasonic system --- n/a

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This book focused on researching food loss and waste in various agricultural supply chains, searching for reduction strategies and possible technological solutions without neglecting the relevance of the socioeconomic factors that influence the functioning of food value chains. The adoption of the 2030 Agenda for Sustainable Development (Goal 12—“Ensure sustainable consumption and production patterns”) calls for renewed efforts to reduce food losses along production and supply chains. Achieving this goal will require greater efforts globally to implement food loss reduction policies and interventions. In addition, the sustainable management and use of byproducts from agriculture, including agricultural residues, has been analyzed. Special attention is given to pre- and post-harvesting losses of agricultural products, including the assessment of their environmental and economic sustainability.

Technology: general issues --- Environmental science, engineering & technology --- biomass --- bioenergy --- straw --- combine harvester --- chaff --- by-product --- bioeconomy --- life cycle assessment --- life cycle costing --- Ricinus communis, L. --- castor oil --- harvesting --- residue management --- biopreservatives --- shelf life --- essential oil --- organic foods --- consumers’ attitude --- willingness to pay --- work productivity --- harvesting costs --- harvesting efficiency --- wheat header --- seed loss --- header impact --- ecoefficiency --- life cycle assessment (LCA) --- life cycle costing (LCC) --- run-off --- pond --- flexible water storage system --- Cynara roots --- biorefinery --- marginal lands --- multipurpose crop --- fermentable sugars --- agricultural residues exploitation --- postharvest losses --- food waste --- physicochemical properties --- table grape --- shelf-life --- decay --- stem browning --- SO2 damage --- socioeconomic impacts --- pomegranate --- losses --- nutrition --- environmental --- resources --- packhouse --- postharvest --- impacts --- Technology. --- Engineering. --- Environmental science. --- Environmental sciences.

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Advances in miniaturization of sensors, actuators, and smart systems are receiving substantial industrial attention, and a wide variety of transducers are commercially available or with high potential to impact emerging markets. Substituting existing products based on bulk materials, in fields such as automotive, environment, food, robotics, medicine, biotechnology, communications, and other technologies, with reduced size, lower cost, and higher performance, is now possible, with potential for manufacturing using advanced silicon integrated circuits technology or alternative additive techniques from the mili- to the nano-scale. In this Special Issue, which is focused on piezoelectric transducers, a wide range of topics are covered, including the design, fabrication, characterization, packaging, and system integration or final applications of mili/micro/nano-electro-mechanical systems based transducers.

cylindrical composite --- piezoceramic/epoxy composite --- electromechanical characteristics --- transducer --- piezoelectric actuators --- positioning --- trajectory control --- numerical analysis --- trajectory planning --- square piezoelectric vibrator --- resonance --- piezoelectric diaphragm pump --- flexible support --- piezoelectric resonance pump --- piezoelectric ceramics actuators --- hysteresis modeling --- Bouc–Wen model --- P-type IL --- MFA control --- SM control --- evidence theory --- active vibration control --- piezoelectric smart structure --- piezoelectric material --- multiphysics simulation --- finite element method (FEM) --- fluid–structure interaction (FSI) --- micro electromechanical systems (MEMS) --- traveling waves --- piezoelectric --- microactuator --- MEMS --- piezoelectric current sensing device --- two-wire power cord --- cymbal structure --- force amplification effect --- sensitivity --- ciliary bodies touch beam --- piezoelectric tactile feedback devices --- anisotropic vibration tactile model --- human factor experiment --- nondestructive testing --- maturity method --- concrete early-age strength --- SmartRock --- ultrasonic waves --- PZT (piezoelectric) sensors --- structural health monitoring --- AlN thin film --- piezoelectric effect --- resonant accelerometer --- z-axis --- debonding --- non-destructive testing --- electromechanical impedance --- damage detection --- impedance-based technique --- damage depth --- piezoelectric vibration energy harvester --- frequency up-conversion mechanism --- impact --- PZT thick film --- piezoelectric ceramic materials --- Duhem model --- hysteresis model --- class-C power amplifier --- diode expander --- piezoelectric transducers --- point-of-care ultrasound systems --- transverse impact --- frequency up-conversion --- piezoelectric bimorph --- human-limb motion --- hybrid energy harvester --- cascade-connected transducer --- low frequency --- small size --- finite element --- acoustic telemetry --- measurement while drilling --- energy harvesting --- pipelines --- underwater networks --- wireless sensor networks --- control algorithm --- waterproof --- coating --- reliability --- flexible micro-devices --- aqueous environments --- seawater --- capacitive pressure sensors --- in-situ pressure sensing --- sensor characterization --- physiological applications --- cardiac output --- aluminum nitride --- resonator --- damping --- quality factor --- electromechanical coupling --- implantable middle ear hearing device --- piezoelectric transducer --- stimulating site --- finite element analysis --- hearing compensation --- adaptive lens --- piezoelectric devices --- fluid-structure interaction --- moving mesh --- thermal expansion --- COMSOL --- petroleum acoustical-logging --- piezoelectric cylindrical-shell transducer --- center-frequency --- experimental-measurement --- piezoelectricity --- visual servo control --- stepping motor --- nano-positioner --- stick-slip --- piezoelectric energy harvester --- cut-in wind speed --- cut-out wind speed --- energy conservation method --- critical stress method --- piezoelectric actuator --- lever mechanism --- analytical model --- stick-slip frication --- nanopositioning stage --- piezoelectric hysteresis --- mark point recognition --- piecewise fitting --- compensation control --- piezo-electromagnetic coupling --- up-conversion --- vibration energy harvester --- multi-directional vibration --- low frequency vibration --- hysteresis compensation --- single-neuron adaptive control --- Hebb learning rules --- supervised learning --- vibration-based energy harvesting --- multimodal structures --- frequency tuning --- nonlinear resonator --- bistability --- magnetostatic force --- robot --- miniature --- traveling wave --- leg --- piezoelectric actuators (PEAs) --- asymmetric hysteresis --- Prandtl–Ishlinskii (PI) model --- polynomial-modified PI (PMPI) model --- feedforward hysteresis compensation --- PIN-PMN-PT --- 1-3 composite --- high frequency --- phased array --- n/a --- Bouc-Wen model --- fluid-structure interaction (FSI) --- Prandtl-Ishlinskii (PI) model