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Laser tracker. --- Length measurement.

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This Master Thesis is the first part of a deeper work about orbit and attitude dynamics coupled
ADCS for high surface-to-mass ratio satellites. Nowadays spacecrafts are designed with complex
shapes and large areas in order to accomplish more peculiar mission objectives, maintaining a low
mass to reduce the launch cost. As a result, for the Earth observation satellites aerodynamic drag
and solar radiation pressure become the main actors, driving and coupling the orbital dynamics
with the attitude one. This is the case of ZodiArt, a new mission carried out by Politecnico di
Milano and supervised by Prof. Camilla Colombo, whose aim is to launch a fleet of MicroSats
each of them equipped with a reflective balloon, to promote space advertisement during night
time and to enhance Earth observation during day time. The work done is subdivided as follows.
Period at ULiège on OUFTI-Next: ADCS design and requirements based on the optical design and performances; optimization of the image acquisition through slewing maneuvers; development of an ADCS simulator; study of the perturbations due to the cryocooler, trade-off between KUL and Hyperion ADCS units, emergency strategies simulations.
Period at Politecnico di Milano: test of the simulator provided to ULiège with ZodiArt platform; development of the simulator including a united state model to couple the orbit and
attitude dynamics; sizing of the ADC subsystem of ZodiArt platform in order to exploit perturbations to control the spacecraft.
Thanks to the part of Thesis here presented, it has been possible to simulate the control
and determination action of the OUFTI-Next ADC subsystem, providing 3 mission profiles
which represent the operative behavior of the CubeSat during its lifetime, both on ISS and Sun
synchronous orbit. In chapter 1 an introduction to the OUFTI-Next project has been provided
and the structure of the work explained, then in chapter 2 the fundamental nomenclature has
been reported and in chapter 3 the main results previously obtained from the team about the
other subsystems are presented. In chapter 4 it has been described how the physics of the problem has been modeled, while chapter 5 has been dedicated to explain the logic behind control parameters optimizations, then in chapter 6 the majority of the results has been listed and commented. Additional analysis have been performed in chapters 7, 8, 9 and 10 respectively about the cryocooler disturbances effects, the sensors noises and update rates, the trade-off between Hyperion and KUL ADCS units and the emergency strategies in case of one reaction wheel or the star tracker failure.
This Thesis has also an appendix, where the reader can find the results of the second mission
profile, both in SSO and ISS orbits, with target following slew maneuvers, and the de-tumbling
model made in Simulink™.

OUFTI --- CubeSat --- ADCS --- Attitude --- Control --- Determination --- Satellite --- Subsystem --- Reaction wheels --- Star tracker --- Magnetic torquers --- Gyros --- cryocooler --- vibrations --- emergency --- Ingénierie, informatique & technologie > Ingénierie aérospatiale

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As users, we require more and more reliable and longer operation of electronic devices. Most often, the efforts of scientists and engineers related to energy management, energy conversion, and energy storage are overlooked. The PowerMEMS slogan in its meaning hides the science of materials enabling the construction of modern accumulators and batteries, so important for the developing consumer electronics and electromobility; energy harvesters used wherever conventional power sources cannot be used; and finally the methods and algorithms of energy processing and management that increase the efficiency of the devices they operate. This Special Issue contains six research papers selected from those presented at the 19th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (Power MEMS 2019), as and representative of all papers presented during the Conference.

History of engineering & technology --- coils --- wireless power transfer --- electrically small antennas --- e-textiles --- internet of things --- wireless energy harvesting --- thermoelectrics --- GeTe --- LiI as dopant --- enhanced power factor --- suppressed thermal transport --- triboelectric nanogenerator (TENG) --- mechanical energy harvesting --- single-electrode --- tapping --- flexibility --- porous/rough PDMS --- parylene C --- hermetic packaging --- IoT --- MEMS --- microbattery --- battery --- harvester --- tracker --- wildlifetracking --- heat flux --- thermal resistance --- thermal conductance --- thermal energy harvesting --- endothermic animal --- fur --- 3D printing --- energy harvester

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As users, we require more and more reliable and longer operation of electronic devices. Most often, the efforts of scientists and engineers related to energy management, energy conversion, and energy storage are overlooked. The PowerMEMS slogan in its meaning hides the science of materials enabling the construction of modern accumulators and batteries, so important for the developing consumer electronics and electromobility; energy harvesters used wherever conventional power sources cannot be used; and finally the methods and algorithms of energy processing and management that increase the efficiency of the devices they operate. This Special Issue contains six research papers selected from those presented at the 19th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (Power MEMS 2019), as and representative of all papers presented during the Conference.

History of engineering & technology --- coils --- wireless power transfer --- electrically small antennas --- e-textiles --- internet of things --- wireless energy harvesting --- thermoelectrics --- GeTe --- LiI as dopant --- enhanced power factor --- suppressed thermal transport --- triboelectric nanogenerator (TENG) --- mechanical energy harvesting --- single-electrode --- tapping --- flexibility --- porous/rough PDMS --- parylene C --- hermetic packaging --- IoT --- MEMS --- microbattery --- battery --- harvester --- tracker --- wildlifetracking --- heat flux --- thermal resistance --- thermal conductance --- thermal energy harvesting --- endothermic animal --- fur --- 3D printing --- energy harvester

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As technology becomes an ever-more prevalent part of everyday life, and population-based physical activity programs seek new ways to increase life-long engagement with physical activity, these two ideas have become increasingly linked. This Special Issue attempts to offer a thorough and critical examination of emerging technologies in physical activity and health promotion, considering technological interventions in different contexts (communities, clinics, schools, homes, etc.) among various populations, exploring the challenges of integrating technology into physical activity promotion, and offering solutions for its implementation. This Special Issue aims to take a broadly positive stance toward interactive technology initiatives and, while discussing some negative implications of an increased use of technology, offers practical recommendations for promoting physical activity through various emerging technologies, including, but not limited to: Active video games (exergaming); social media; mobile device apps; health wearables; mobile games, augmented reality games, global positioning and geographic information systems; and virtual reality. Offering a logical and clear critique of emerging technologies in physical activity and health promotion, this Special Issue will provide useful suggestions and practical implications for researchers, practitioners, and educators in the fields of public health, kinesiology, physical activity and health, and healthcare.

virtual reality --- Amazon Web Services --- wrist-worn activity tracker --- sex difference --- motor skill competence --- mental health --- physical activity assessment --- mHealth --- augmented reality --- musculoskeletal fitness --- health navigator --- Google Glass --- cardiorespiratory fitness --- fitness --- safety --- moderate-to-vigorous physical activity --- young children --- serious games --- autism spectrum disorder --- physical exercise --- locomotor skills --- active video game --- air quality --- app --- Google --- perceived environmental factor --- motor activity --- active video gaming --- anxiety --- digital health --- narrative review --- preoperative experience --- real-time physical activity --- quality of life --- smartglasses --- Amazon --- intelligence quotient --- mobile phone-based health intervention --- Korean American immigrant women --- Fitbits --- exercise --- epoch --- wearable technology --- measurement --- active video games --- preoperative anxiety --- sedentary behaviour --- mammogram --- sedentary behavior --- heart rate --- social cognitive theory --- senior citizens --- social communication --- breast cancer --- technology --- physical activity --- Autism --- accelerometry --- socio-ecological model --- light physical activity --- recreational physical activity --- screen based sedentary behavior --- accelerometers --- placement site --- virtual reality game --- pedometers --- object control skills --- depression --- physical activity levels