Environmental conditions and pressurized spacesuits expose astronauts to problems of fatigue during lengthy extravehicular activities, with adverse impacts especially on the dexterity, force and endurance of the hands and arms. A state-of-the-art exploration in the field of hand exoskeletons revealed that available products are unsuitable for space applications because of their bulkiness and mass. This book proposes a novel approach to the development of hand exoskeletons, based on an innovative soft robotics concept that relies on the exploitation of electroactive polymers operating as sensors and actuators, on a combination of electromyography and mechanomyography for detection of the user’s will and on neural networks for control. The result is a design that should enhance astronauts’ performance during extravehicular activities. In summary, the advantages of the described approach are a low-weight, high-flexibility exoskeleton that allows for dexterity and compliance with the user’s will.
This book explores the Byzantine city and the changes it went through from 610 to 1204. Throughout this period, cities were always the centers of political and social life for both secular and religious authorities, and, furthermore, the focus of the economic interests of local landowning elites. This book therefore examines the regional and subregional trajectories in the urban function, landscape, structure and fabric of Byzantium’s cities, synthesizing the most cutting-edge archaeological excavations, the results of analyses of material culture (including ceramics, coins, and seals) and a reassessment of the documentary and hagiographical sources. The transformation the Byzantine urban landscape underwent from the seventh to thirteenth centuries can afford us a better grasp of changes to the Byzantine central and provincial administrative apparatus; their fiscal machinery, military institutions, socio-economic structures and religious organization. This book will be of interest to students and researchers of the history, archaeology and architecture of Byzantium.
While the process of democratization is nowadays an established scholarship, the reverse process of de-democratization has generated less attention even when the regression or even breakdown of democracy occurred on a regular basis over past decades. This book investigates both the different combination of explanatory factors triggering the transition from democratic rule as well as the role of the actors’ involved in the process. It aims to integrate different levels of analysis and explanatory factors through a comparative analysis of the phenomenon since the beginning of the third wave of democratization. As such, it addresses the existing divide between the approaches focused on the conditions and those focused on the processes of change, using a mixed-method research design. This text will be of key interest to scholars and students of comparative politics, democracy, democratization and de-democratization, political theory, and comparative political institutions.
After colonizing the Aegean islands and the coast of Asia Minor, the ancient Greeks turned toward southern Italy and Sicily, driven by the unrest that troubled their homeland in the eighth and seventh centuries B.C. The new arrivals brought with them their language, as well as their cultural and religious traditions and the institution of the polis. In Italy they created an autonomous political community that eventually surpassed the cities of Greece in wealth, military power, and architectural and cultural splendor. Such forefathers of Western philosophy as Pythagoras, Parmenides, and Archimedes lived and worked within this civilization. The Greek Cities of Magna Graecia and Sicily presents an overview of Greek colonization in Italy and the principal historical events that took place in this area from the Archaic period until the ascendancy of the Romans. This comprehensive survey is followed by a review of the major archaeological sites in the region.
Environmental conditions and pressurized spacesuits expose astronauts to problems of fatigue during lengthy extravehicular activities, with adverse impacts especially on the dexterity, force and endurance of the hands and arms. A state-of-the-art exploration in the field of hand exoskeletons revealed that available products are unsuitable for space applications because of their bulkiness and mass. This book proposes a novel approach to the development of hand exoskeletons, based on an innovative soft robotics concept that relies on the exploitation of electroactive polymers operating as sensors and actuators, on a combination of electromyography and mechanomyography for detection of the user’s will and on neural networks for control. The result is a design that should enhance astronauts’ performance during extravehicular activities. In summary, the advantages of the described approach are a low-weight, high-flexibility exoskeleton that allows for dexterity and compliance with the user’s will.
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