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Book
Analysis of a Rotatable Wind Turbine Tower by means of Aero-Servo-Elastic Load Simulations
Author:
ISBN: 1000123255 3731510456 Year: 2021 Publisher: Karlsruhe KIT Scientific Publishing

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Abstract

This work highlights how the costs and CO2-emissions of land-based wind turbines can be reduced by means of an innovative and material efficient support structure concept. Thereby the yaw system is placed at the tower base, allowing the whole wind turbine tower to be rotated. The potential of a rotatable inclined lattice tower concept was analysed by means of aero-servo-elastic load simulations in the FAST environment. A balance between different cost aspects revealed significant savings.


Book
Die synchronisierte Stadt : öffentliche Uhren und Zeitwahrnehmung, Wien 1850 bis heute
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Year: 2015 Publisher: Holzhausen

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The work at hand explores the successive chronometrisation of public space using the example of Vienna's public clocks from the middle of the 19th century until today...On the one hand it deals with the “exterior chronometrisation“, that is the visible aggregation of the infrastructure of time and the construction of different kinds of clocks... On the other hand it deals with the “interior chronometrisation“ which means social, psychological and cultural aspects of the perception of time and their contextualisation in phenomena of scaling and standardisation on a local basis to a world scale. The actual trend of visualising public time to the split second marks the (temporary) end of the development which shows the speedup of all areas of life in a visible and sensible way.


Multi
Babel : ordre ou chaos : nouveaux enjeux du mythe dans les oeuvres de la modernité littéraire
Author:
ISSN: 12777749 ISBN: 9782843101779 2843101778 2377471188 Year: 2010 Volume: *3 Publisher: Grenoble: Ellug,

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La perte de la langue unique est-elle vraiment un drame ? À lire les travaux de nombreux critiques, exégètes ou philosophes contemporains, on pourrait en douter. Si l'image de la tour inachevée évoque encore pour certains un champ de ruines, l'univers babélien qui est le nôtre, celui du multiple, tend souvent désormais à être considéré comme une bienheureuse nécessité - un ordre, au sens le plus noble du terme. La littérature moderne a joué un rôle crucial dans cette volonté d'en finir avec une image négative de Babel. Mais en reprenant ce vieux mythe biblique, des écrivains comme Kafka, Dos Passos, Borges, Pierre Emmanuel ou Paul Auster ne se sont pas contentés d'ouvrir la voie à un renversement axiologique : ils ont subtilement mis au jour le substrat politique, éthique et philosophique du récit, et souligné, en particulier, les enjeux herméneutique et téléologique qui lui sont attachés. Ordre et chaos n'existent qu'à la faveur d'un sens et d'une finalité à l'aune desquels il est possible de les évaluer.


Book
Optical Technologies Applied to Cultural Heritage
Authors: ---
Year: 2022 Publisher: Basel MDPI - Multidisciplinary Digital Publishing Institute

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Abstract

A short book about different issues in optical technologies. The importance of optical technologies for artwork charaterization is well known, in this book we show some examples where different optical technologies are applied in real cultural heritage artworks.

Keywords

digital archaeology --- image classification --- stratigraphy --- landscape archaeology --- sediment analysis --- spectroscopy --- proximal sensing --- porcelain --- enamels --- China --- 18th century --- Raman microspectroscopy --- pXRF --- pigments --- arsenic --- cobalt --- Naples yellow --- Dzi bead --- agate --- X-ray diffraction --- X-ray fluorescence --- X-ray absorption near edge structure --- X-ray imaging --- colour --- art --- visual --- accommodation --- binocular vision --- silver nanostars --- surface enhanced Raman spectroscopy --- cross-sections --- copper phthalocyanine --- blue pigment --- analytical diagnostics --- National Gallery of Parma --- Madonna della Misericordia --- pigment identification --- preliminary drawing --- gilding --- Byzantine --- projection mapping --- calibration --- lighting --- cultural heritage --- light damage --- colour difference --- ageing --- monitoring --- imaging spectroscopy --- spectral imaging --- exhibitions --- preventive --- quantitative --- books --- paper --- conservation --- archive --- library --- art conservation --- spectral optimization --- color quality --- LEDs --- light intensity --- illuminance --- exposure --- energy efficiency --- damage --- daguerreotype --- tarnish --- chemical cleaning --- electrocleaning --- synchrotron --- X-ray fluorescence imaging --- non-invasive investigations --- portable/reflectance spectroscopy --- portable Raman spectroscopy --- lead antimonate --- enamel blue --- caput mortuum --- hyperspectral imaging --- 18th century painting --- FORS --- XRF --- photogrammetry --- workflow --- Alhambra’s Tower of the Captive --- n/a --- Alhambra's Tower of the Captive


Book
Wind Turbine Power Optimization Technology
Authors: ---
ISBN: 3039289349 3039289330 Year: 2020 Publisher: MDPI - Multidisciplinary Digital Publishing Institute

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Wind turbines are one of the most promising renewable energy technologies, and this motivates fertile research activity about developments in power optimization. This topic covers a wide range of aspects, from the research on aerodynamics and control design to the industrial applications about on-site wind turbine performance control and monitoring. This Special Issue collects seven research papers about several innovative aspects of the multi-faceted topic of wind turbine power optimization technology. The seven research papers deal respectively with the aerodynamic optimization of wind turbine blades through Gurney flaps; optimization of blade design for large offshore wind turbines; control design optimization of large wind turbines through the analysis of the competing objectives of energy yield maximization and fatigue loads minimization; design optimization of a tension leg platform for floating wind turbines; innovative methods for the assessment of wind turbine optimization technologies operating on site; optimization of multiple wake interactions modeling through the introduction of a mixing coefficient in the energy balance method; and optimization of the dynamic stall control of vertical-axis wind turbines through plasma actuators. This Special Issue presents remarkable research activities in the timely subject of wind turbine power optimization technology, covering various aspects. The collection is believed to be beneficial to readers and contribute to the wind power industry.


Book
Urban and Buildings Regeneration Strategy to Climatic Change Mitigation, Energy, and Social Poverty after a World Health and Economic Global Crisis
Author:
Year: 2021 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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In recent months, we have suffered the effects of an unexpected global health crisis that has led to an even worse global economic crisis, with GDPs plummeting to unprecedented levels. While our health workers struggle to find a vaccine to protect our health, we have had to live through situations hitherto unimagined, and we have spent even more time in our homes while our streets remained empty, which has brought to light the weaknesses and strengths of our system and our way of building and designing. Our aim is to publish research projects and papers that contribute to reactivate the Construction Sector from within, in the context of this world economic crisis. Such an effort will focus especially on solutions that improve the quality of indoor air in buildings, strengthening the circular economy in an eco-efficient rehabilitation of buildings and neighborhoods in our cities.


Book
Remotely Sensed Albedo
Authors: --- ---
Year: 2021 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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Albedo is a known and documented phenomenon, defined as the reflectivity of a surface, i.e., the ratio of reflected light energy to incident light energy. It is a dimensionless quantity, used in particular in agro-forestry, urban environment, cryosphere and geology. It is an Essential Climate Variable (ECV), deemed extremely meaningful to compute the earth heat balance. The albedo of natural surfaces varies largely, especially in the visible, with the lowest values found for water bodies and dense vegetation canopies and the highest values for desert and snow. It also changes with the angular distribution and spectral composition of the incident radiation and with the surface moisture. Satellite observations allow consistent measuring of the surface albedo at continental scale over a short period of time. Long-term series of surface albedo are good indicators of climate change, especially over glaciers and polar caps. On the other hand, the albedo of bare soil provides a good diagnostic of their degradation. The reliability of satellite albedo is verified against ground-based radiometers and UAV, which also serves to calibrate the instruments embarked on space-borne observing systems and check the quality of the atmospheric correction.


Book
Energy-Water Nexus
Authors: --- ---
Year: 2021 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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Water is necessary to produce energy, and energy is required to pump, treat, and transport water. The energy–water nexus examines the interactions between these two inextricably linked elements. This Special Issue aims to explore a single "system of systems" for the integration of energy systems. This approach considers the relationships between electricity, thermal, and fuel systems; and data and information networks in order to ensure optimal integration and interoperability across the entire spectrum of the energy system. This framework for the integration of energy systems can be adapted to evaluate the interactions between energy and water. This Special Issue focuses on the analysis of water interactions with and dependencies on the dynamics of the electricity sector and the transport sector


Book
Assessment and Nonlinear Modeling of Wave, Tidal and Wind Energy Converters and Turbines
Authors: ---
Year: 2020 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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The Special Issue “Assessment and Nonlinear Modeling of Wave, Tidal, and Wind Energy Converters and Turbines” contributes original research to stimulate the continuing progress of the offshore renewable energy (ORE) field, with a focus on state-of-the-art numerical approaches developed for the design and analysis of ORE devices. Particularly, this collection provides new methodologies, analytical/numerical tools, and theoretical methods that deal with engineering problems in the ORE field of wave, wind, and current structures. This Special Issue covers a wide range of multidisciplinary aspects, such as the 1) study of generalized interaction wake model systems with elm variation for offshore wind farms; 2) a flower pollination method based on global maximum power point tracking strategy for point-absorbing type wave energy converters; 3) performance optimization of a Kirsten–Boeing turbine using a metamodel based on neural networks coupled with CFD; 4) proposal of a novel semi-submersible floating wind turbine platform composed of inclined columns and multi-segmented mooring lines; 5) reduction of tower fatigue through blade back twist and active pitch-to-stall control strategy for a semi-submersible floating offshore wind turbine; 6) assessment of primary energy conversion of a closed-circuit OWC wave energy converter; 7) development and validation of a wave-to-wire model for two types of OWC wave energy converters; 8) assessment of a hydrokinetic energy converter based on vortex-induced angular oscillations of a cylinder; 9) application of wave-turbulence decomposition methods on a tidal energy site assessment; 10) parametric study for an oscillating water column wave energy conversion system installed on a breakwater; 11) optimal dimensions of a semisubmersible floating platform for a 10 MW wind turbine; 12) fatigue life assessment for power cables floating in offshore wind turbines.

Keywords

off-shore wind farms (OSWFs) --- wake model --- wind turbine (WT) --- Extreme Learning Machine (ELM) --- wind power (WP) --- large-eddy simulation (LES) --- point-absorbing --- wave energy converter (WEC) --- maximum power point tracking (MPPT) --- flower pollination algorithm (FPA) --- power take-off (PTO) --- hill-climbing method --- Kirsten–Boeing --- vertical axis turbine --- optimization --- neural nets --- Tensorflow --- ANSYS CFX --- metamodeling --- FOWT --- multi-segmented mooring line --- inclined columns --- semi-submersible --- AFWT --- floating offshore wind turbine (FOWT) --- pitch-to-stall --- blade back twist --- tower fore–aft moments --- negative damping --- blade flapwise moment --- tower axial fatigue life --- wave energy --- oscillating water column --- tank testing --- valves --- air compressibility --- air turbine --- wave-to-wire model --- energy harnessing --- energy converter --- flow-induced oscillations --- vortex-induced vibration --- flow–structure interaction --- hydrodynamics --- vortex shedding --- cylinder wake --- tidal energy --- site assessment --- wave-current interaction --- turbulence --- integral length scales --- wave-turbulence decomposition --- OWC --- wave power converting system --- parametric study --- caisson breakwater application --- floating offshore wind turbines --- frequency domain model --- semisubmersible platform --- 10 MW wind turbines --- large floating platform --- platform optimization --- wind energy --- floating offshore wind turbine --- dynamic analysis --- fatigue life assessment --- flexible power cables --- Daguragu / Kalkaringi / Wave Hill (Central NT SE52-08)


Book
Fiducial Reference Measurements for Satellite Ocean Colour
Authors: --- --- --- ---
Year: 2020 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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Ocean color measured by satellite-mounted optical sensors is an essential climate variable that is routinely used as a central element for assessing the health and productivity of marine ecosystems and the role of oceans in the global carbon cycle. For satellite ocean color to be reliable and used in these and other important environmental applications, the data must be trustworthy and high quality. Pre-flight and on-board calibration of satellite ocean color sensors is conducted; however, once in orbit, the data quality can only be fully assessed via independent calibration and validation activities using surface measurements. These measurements therefore need to be at least as high quality as the satellite data, which necessitates SI traceability and a full uncertainty budget. This is the basis for fiducial reference measurements (FRMs) and the FRM4SOC project, which was an European Space Agency (ESA) initiative to establish and maintain SI-traceable ground-based FRM for satellite ocean color, thus providing a fundamental contribution to the European system for monitoring the Earth (Copernicus). This Special Issue of MDPI Remote Sensing is designed to showcase this essential Earth observation work through the publication of the project’s main achievements and results accompanied by other select relevant articles.

Keywords

VIIRS --- SNPP --- NOAA-20 --- DINEOF --- ocean color data --- data merging --- gap-filling --- ocean color radiometers --- radiometric calibration --- indoor intercomparison measurement --- agreement between sensors --- measurement uncertainty --- field intercomparison measurement --- Hyperspectral reflectance --- validation --- autonomous measurements --- ground-truth data --- system design --- downwelling irradiance --- satellite validation --- Fiducial Reference Measurements --- water reflectance --- satellite --- calibration --- solar diffusor --- SDSM --- desert trend --- lunar calibration --- RVS --- MODIS --- Aqua --- ocean color --- water-leaving radiance --- atmospheric correction --- Sentinel-3 OLCI --- Copernicus --- ocean colour --- system vicarious calibration --- fiducial reference measurement --- Lampedusa --- MOBY --- MarONet --- radiometry --- research infrastructure --- uncertainty budget --- satellite ocean colour --- fiducial reference measurements (FRM) --- calibration and validation --- SI traceability and uncertainty --- European Space Agency (ESA) --- Committee for Earth Observation Satellites (CEOS) --- fiducial reference measurements --- SI-traceability --- Mediterranean Sea --- BOUSSOLE --- MSEA --- hyper-temporal dataset --- optical radiometry --- coastal environment --- observation geometry --- remote sensing reflectance --- ocean colour radiometers --- TriOS RAMSES --- Seabird HyperSAS --- field intercomparison --- AERONET-OC --- Acqua Alta Oceanographic Tower --- remote sensing --- spectral irradiance comparison --- spectral radiance sources comparison

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