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As almost all human activities have been moved online due to the pandemic, novel robust and efficient approaches and further research have been in higher demand in the field of computer science and telecommunication. Therefore, this (reprint) book contains 13 high-quality papers presenting advancements in theoretical and practical aspects of computer recognition, pattern recognition, image processing and machine learning (shallow and deep), including, in particular, novel implementations of these techniques in the areas of modern telecommunications and cybersecurity.

Technology: general issues --- History of engineering & technology --- pointer instrumentation --- image processing --- object detection --- K-fold cross-validation --- Faster-RCNN --- vein detection --- digital image processing --- correlation --- displacement measurement --- semantic segmentation --- farmland vacancy segmentation --- strip pooling --- crop growth assessment --- encoder–decoder --- monotone curve --- tangent circle --- adjacent circle --- area of location of the curve --- contour --- fingerprinting --- malware analysis --- malicious network traffic analysis --- HTTP protocol analysis --- pcap file analysis --- malware tracking --- malware identification --- graph theory --- smart meter --- smart metering --- wireless sensor network --- interpolation --- tangent line --- curvature --- error --- ellipse --- B-spline --- dynamic dedicated path protection --- generic Dijkstra algorithm --- elastic optical network --- modulation constraints --- ECG signal --- classification --- PTB-XL --- deep learning --- computer vision --- adversarial attacks --- adversarial defences --- image quality assessment --- stitched images --- panoramic images --- image analysis --- image entropy --- NetFlow --- network intrusion detection --- network behavior analysis --- data quality --- feature selection --- fronthaul --- Xhaul --- DSB-RFoF --- A-RoF --- B5G --- 6G --- DIPP --- optical channel selection --- n/a --- encoder-decoder

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Non-invasive biomedical sensors for monitoring physiological parameters from the human body for potential future therapies and healthcare solutions. Today, a critical factor in providing a cost-effective healthcare system is improving patients' quality of life and mobility, which can be achieved by developing non-invasive sensor systems, which can then be deployed in point of care, used at home or integrated into wearable devices for long-term data collection. Another factor that plays an integral part in a cost-effective healthcare system is the signal processing of the data recorded with non-invasive biomedical sensors. In this book, we aimed to attract researchers who are interested in the application of signal processing methods to different biomedical signals, such as an electroencephalogram (EEG), electromyogram (EMG), functional near-infrared spectroscopy (fNIRS), electrocardiogram (ECG), galvanic skin response, pulse oximetry, photoplethysmogram (PPG), etc. We encouraged new signal processing methods or the use of existing signal processing methods for its novel application in physiological signals to help healthcare providers make better decisions.

Medical equipment & techniques --- movement intention --- brain–computer interface --- movement-related cortical potential --- neurorehabilitation --- phonocardiogram --- machine learning --- empirical mode decomposition --- feature extraction --- mel-frequency cepstral coefficients --- support vector machines --- computer aided diagnosis --- congenital heart disease --- statistical analysis --- convolutional neural network (CNN) --- long short-term memory (LSTM) --- emotion recognition --- EEG --- ECG --- GSR --- deep neural network --- physiological signals --- electroencephalography --- Brain-Computer Interface --- multiscale principal component analysis --- successive decomposition index --- motor imagery --- mental imagery --- classification --- hybrid brain-computer interface (BCI) --- home automation --- electroencephalogram (EEG) --- steady-state visually evoked potential (SSVEP) --- eye blink --- short-time Fourier transform (STFT) --- convolution neural network (CNN) --- human machine interface (HMI) --- rehabilitation --- wheelchair --- quadriplegia --- Raspberry Pi --- image gradient --- AMR voice --- Open-CV --- image processing --- acoustic --- startle --- reaction --- response --- reflex --- blink --- mobile --- sound --- stroke --- EMG --- brain-computer interface --- myoelectric control --- pattern recognition --- functional near-infrared spectroscopy --- z-score method --- channel selection --- region of interest --- channel of interest --- respiratory rate (RR) --- Electrocardiogram (ECG) --- ECG derived respiration (EDR) --- auscultation sites --- pulse plethysmograph --- biomedical signal processing --- feature selection and reduction --- discrete wavelet transform --- hypertension

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This Special Issue gathers topics of utmost interest in the field of antennas and propagation, such as: new directions and challenges in antenna design and propagation; innovative antenna technologies for space applications; metamaterial, metasurface and other periodic structures; antennas for 5G; electromagnetic field measurements and remote sensing applications.

Technology: general issues --- Energy industries & utilities --- 5G mobile communication --- Sub-6-GHz --- compact antenna --- channel selection --- channel filters --- metamaterials --- antenna radiation measurements --- common mode current --- distance averaging --- multipath site --- small antenna --- loop probe --- log-periodic dipole array --- wideband antenna --- VHF --- cross polarized --- array element --- radio detection --- cosmic rays --- ultra-wide band antennas --- energy-based antenna descriptors --- pulsed sources --- direction finding --- dual-band dipole --- CRLH antenna --- dual-band balun --- CRLH balun --- wireless communication --- textile antenna --- wearable antenna --- SAR --- flexible antenna --- low-profile antenna --- sensor network --- active test --- UWB --- 802.15.4z --- timestamp detection --- ranging --- multipath --- frequency fading --- dye-sensitized solar cells --- integration --- antenna array --- solar antenna --- multibandoperation --- slotted antenna --- microwave --- millimeter-wave band --- WLAN --- 5G --- frequency multiplexed --- IoT --- millimeter-waves --- multi-band --- n-band antenna --- antenna as a sensor --- meander line antenna --- periodic structure --- millimeter-wave antenna --- frequency scanning antenna --- leaky-wave antenna --- planar sensor --- non-invasive --- Split Ring Resonator --- dielectrics measurements --- RF absorbing materials --- higher symmetries --- glide symmetry --- periodic structures --- mode matching --- dispersion analysis --- radar cross section (RCS) measurement --- near-field to far-field transformation (NFFFT) --- spherical wave expansion (SWE) --- anisotropy --- dielectric constant --- material characterization --- planar resonators --- substrate bending --- textile fabrics --- wearable radiators --- reflectarray antennas --- multibeam antennas --- dual band reflectarrays --- communication satellites --- Ka-band --- near-field antenna effect --- radar calibration --- MIMO radar --- turntable radar --- UWB radar --- radar system --- scattering imaging --- inverse scattering problem --- radar resolution --- photomixer --- terahertz source --- two dimensional photonic crystal --- frequency selective surface superstrate --- terahertz antenna --- dielectric resonator antenna --- biomedical devices --- wireless communication link --- near-field region --- impedance matching characteristics --- horizontal polarization --- UAV ground station --- Omni-directional --- wireless power transmission (WPT) --- energy harvesting --- rectenna --- wireless sensors --- n/a

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• Reference Manager
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This Special Issue gathers topics of utmost interest in the field of antennas and propagation, such as: new directions and challenges in antenna design and propagation; innovative antenna technologies for space applications; metamaterial, metasurface and other periodic structures; antennas for 5G; electromagnetic field measurements and remote sensing applications.

5G mobile communication --- Sub-6-GHz --- compact antenna --- channel selection --- channel filters --- metamaterials --- antenna radiation measurements --- common mode current --- distance averaging --- multipath site --- small antenna --- loop probe --- log-periodic dipole array --- wideband antenna --- VHF --- cross polarized --- array element --- radio detection --- cosmic rays --- ultra-wide band antennas --- energy-based antenna descriptors --- pulsed sources --- direction finding --- dual-band dipole --- CRLH antenna --- dual-band balun --- CRLH balun --- wireless communication --- textile antenna --- wearable antenna --- SAR --- flexible antenna --- low-profile antenna --- sensor network --- active test --- UWB --- 802.15.4z --- timestamp detection --- ranging --- multipath --- frequency fading --- dye-sensitized solar cells --- integration --- antenna array --- solar antenna --- multibandoperation --- slotted antenna --- microwave --- millimeter-wave band --- WLAN --- 5G --- frequency multiplexed --- IoT --- millimeter-waves --- multi-band --- n-band antenna --- antenna as a sensor --- meander line antenna --- periodic structure --- millimeter-wave antenna --- frequency scanning antenna --- leaky-wave antenna --- planar sensor --- non-invasive --- Split Ring Resonator --- dielectrics measurements --- RF absorbing materials --- higher symmetries --- glide symmetry --- periodic structures --- mode matching --- dispersion analysis --- radar cross section (RCS) measurement --- near-field to far-field transformation (NFFFT) --- spherical wave expansion (SWE) --- anisotropy --- dielectric constant --- material characterization --- planar resonators --- substrate bending --- textile fabrics --- wearable radiators --- reflectarray antennas --- multibeam antennas --- dual band reflectarrays --- communication satellites --- Ka-band --- near-field antenna effect --- radar calibration --- MIMO radar --- turntable radar --- UWB radar --- radar system --- scattering imaging --- inverse scattering problem --- radar resolution --- photomixer --- terahertz source --- two dimensional photonic crystal --- frequency selective surface superstrate --- terahertz antenna --- dielectric resonator antenna --- biomedical devices --- wireless communication link --- near-field region --- impedance matching characteristics --- horizontal polarization --- UAV ground station --- Omni-directional --- wireless power transmission (WPT) --- energy harvesting --- rectenna --- wireless sensors --- n/a