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This special feature issue has been initiated to celebrate the 25th anniversary of Optical Coherence Tomography (OCT). In OCT, broad bandwidth light is used in order to produce cross sectional images of turbid and translucent samples with high axial resolution (in the order of a few µm). The imaging speed of OCT can be as high as several millions of depth scans (A-scans) per second which allows for various applications in different fields. This special feature issue consists of three overview papers covering OCT angiography, polarization-sensitive OCT and dental applications of OCT. Additional applications and the latest developments in OCT are covered in nine research papers. The latest developments presented in this issue include magnetomotive OCT, resonant Doppler OCT, full field OCT, new segmentation algorithms and depth range extension. Applications of OCT are widely spread and range from quality control in tooth prostheses and coating thickness measurements in the automotive industry to the assessment of degradation of coatings and alveolar dynamics.

Optical Coherence tomography --- Angiography --- Polarization --- Biomedical Engineering --- Optics

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The cerebral cortex plays central roles in many higher-order functions such as cognition, language, consciousness, and the control of voluntary behavior. These processes are performed by the densely interconnected networks of excitatory pyramidal neurons and inhibitory interneurons, and the balanced development of these two types of neuron is quite important. During cortical development, pyramidal neurons and interneurons show quite different migratory behaviors: radial migration and tangential migration, respectively. Pyramidal neurons are generated in the ventricular zone of the dorsal telencephalon, and migrate radially along radial glial fibers toward the pial surface, forming a six-layered cortical structure in an “ inside-out” manner. On the other hand, cortical interneurons are generated in the medial and caudal ganglionic eminence in the ventral telencephalon, and follow long tangential migratory paths into the cortex. Defects in these migration processes result in abnormalities in the cortical layer structure and neuronal networks, which may cause various neurological and psychiatric conditions such as epilepsy and schizophrenia. Accordingly, besides basic scientific interest, elucidation of the mechanism of neuronal migration is essential for understanding the pathogenesis of these diseases. This Research Topic includes a series of articles ranging from the basic mechanism of neocortical development to the malformation and evolution of the neocortex. We do hope that the present ebook will further stimulate the interest in the fascinating investigations of neuronal migration and corticogenesis.

corticogenesis --- neuronal migration --- Neurogenesis --- radial glial cells --- Neuronal polarization --- Cortical evolution --- subplate --- neurodevelopmental diseases

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The refugee question occupied centre stage at every political debate in Europe since 2015. Starting from the "long summer of migration", the polarization of opinions and attitudes towards asylum seekers among citizens of the EU has grown increasingly. The divergence between hospitality and hostility has also become evident in political reactions. 

migrations --- asylum seekers --- refugees --- Europe --- polarization --- hospitality --- policy --- Germany --- Sweden --- Hungary --- Greece --- Italy --- Belgium --- cross-national

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This compact open access reference delves beyond popular concepts of educated consumers and an informed public by examining the science behind deliberative engagement. Using data from four longitudinal studies, the authors assess public engagement methods in deliberative discussions of ethical, legal, and social issues concerning innovations in nanotechnology. Coverage includes the theoretical origins of the studies, forms of engagement and variations used, and in-depth details on cognitive, affective, and social components that go into the critical thinking process and forming of opinions. Not only are the findings intriguing in and of themselves, but researchers from varied fields will also find them useful in pursuing their own projects.Featured in the coverage:Experimental methods and measures used in relation to specific outcomes.Forms of deliberative engagement affecting objective and subjective knowledge.Effects of engagement variables on attitude formation, change, and polarization.Tracing the processes leading to policy acceptance and support.Study conclusions and evaluation.Plus supplemental materials giving readers access to full study data.Since public engagement methods are widely regarded as valuable for policy input, planning purposes, and understanding societal processes, Deliberative Engagement with Science stands to have a wide audience among psychologists, researchers, academics, and policymakers, as well as professionals in the corporate sphere and the tech industries.

experimental manipulations of deliberative engagement --- nanotechnology public policy issues --- education-oriented communications --- experimental social science --- science, technology and society --- innovation policy --- cognitive-affective engagement --- polarization of public attitudes

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As we all know, electrons carry both charge and spin. The processing of information in conventional electronic devices is based only on the charge of electrons. Spin electronics, or spintronics, uses the spin of electrons, as well as their charge, to process information. Metals, semiconductors, and insulators are the basic materials that constitute the components of electronic devices, and these types of materials have been transforming all aspects of society for over a century. In contrast, magnetic metals, half-metals (including zero-gap half-metals), magnetic semiconductors (including spin-gapless semiconductors), dilute magnetic semiconductors, and magnetic insulators are the materials that will form the basis for spintronic devices. This book aims to collect a range of papers on novel materials that have intriguing physical properties and numerous potential practical applications in spintronics.

Heusler alloy --- spin gapless semiconductor --- electronic structure --- spin transport --- quaternary Heusler compound --- first-principle calculations --- physical nature --- electronic property --- magnetism --- bulk CrSi2 --- monolayer CrSi2 --- first-principle --- Heusler alloy --- electronic structure --- magnetism --- doping --- Heusler alloy --- interface structure --- magnetism --- spin polarization --- first-principles method --- half-metallicity --- equiatomic quaternary Heusler compounds --- Nb (100) surface --- Mo doping --- H adsorption --- H diffusion --- first-principles calculation --- quaternary Heusler alloy --- doping --- spin polarization --- half-metallicity --- magnetism --- skyrmion --- Dzyaloshinskii–Moriya interaction --- exchange energy --- magnetic anisotropy --- half-metallic materials --- first-principles calculations --- quaternary Heusler compound --- phase stability --- magnetic properties --- covalent hybridization --- MgBi2O6 --- optical properties --- mechanical anisotropy --- lattice dynamics --- first-principles calculations --- half-metallic material --- first principles --- Prussian blue analogue --- pressure --- n/a