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Wyświetlanie 1-15 z 23
Tytuł:
Bioactive Ceramic Coating Solution for Offshore Floating Wind Farms
Autorzy:
Sanz, D. S..
García, S.
Trueba, L.
Trueba, A.
Powiązania:
https://bibliotekanauki.pl/articles/1841491.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
offshore structures
bioactive ceramic coating
ceramic coating
offshore floating wind farms
maritime wind farms
floating wind farms
offshore wind farms
offshore platform
Opis:
Biofouling is a natural phenomenon that consists of the accumulation of living organisms on an artificial surface submerged or in contact with water like Offshore platforms. This study highlights the need for offshore floating wind farms structures to consider the choice of material used in offshore applications to minimize microbial-associated and corrosion problems. For this purpose, differences in the total of seawater biofouling attached on two coated paints and three ceramic coatings in carbon steel for offshore structures were evaluated and compared. All ceramic coatings were made of incorporating, by electrophoretic deposition, active ceramic particles against biofouling as copper, silver, zinc and titanium. This experiment consisted of testing ceramic coatings and conventional paints in a real environment with high biological activity and at the same time in a shallow marine environment for a period of 1 year, which provided positive comparisons with the standard system (ASTM-D3623) for using in protecting offshore marine structures.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2021, 15, 2; 407-412
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Repeatability and reproducibility of dry and wet heat resistance tests according to EN 12721 and EN 12722
Powtarzalność i odtwarzalność badań odporności na ciepło suche i mokre według norm EN 12721 and EN 12722
Autorzy:
Perez, R.M.
Roux, M.-L.
Milla, J.L.
Garcia, S.
Delorme, T.
Lacourt, S.
Powiązania:
https://bibliotekanauki.pl/articles/52760.pdf
Data publikacji:
2012
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna
Tematy:
repeatability
reproducibility
dry heat resistance test
wet heat resistance test
EN 12721 standard
EN 12722 standard
European standard
surface resistance
furniture
furniture surface
Opis:
The European Standards 12721 and 12722 specify a method for the assessment of the surface resistance to wet and dry heat of furniture respectively. The aim of the research is to establish data on the test precision of both tests in order that this precision is mentioned on the standards and test reports based on them. It is intended to measure the reproducibility and repeatability according to the standard ISO 5725-2 of data obtained in an international round-robin exercise carried out by eight participating laboratories expert in furniture surfaces. The results presented show that the repeatability variance is almost 0, while the between-laboratory variance is between 0 and 1, according to the order of increment of the assessment rating code.
Normy europejskie 12721 i 12722 określają metodę oceny odporności powierzchni meblowych na mokre i suche ciepło. Celem badań jest ustalenie danych dotyczących precyzji oby rodzajów badań w celu umieszczenia tych informacji w normach i sprawozdaniach z badań opartych na tych normach. Zamierza się dokonać pomiarów powtarzalności i odtwarzalności wyników międzynarodowego badania round-robin przeprowadzonego przez osiem laboratoriów, które specjalizują się w badaniu powierzchni, zgodnie z normą ISO 5725-2. Zaprezentowane wyniki wskazują, że wariancja powtarzalności jest bliska 0, natomiast wariancja pomiędzy laboratoriami mieści się w przedziale 0 i 1, zgodnie z porządkiem wzrostu kodów oceny.
Źródło:
Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2012, 55, 187
1644-3985
Pojawia się w:
Drewno. Prace Naukowe. Doniesienia. Komunikaty
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of the influence of temperature and water level of the reservoir about the displacement of a concrete dam
Autorzy:
Oro, S. R.
Mafioleti, T. R.
Chaves Neto, A.
Garcia, S. R. P.
Neumann, C.
Powiązania:
https://bibliotekanauki.pl/articles/264428.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
zapora betonowa
analiza wieloczynnikowa
monitorowanie strukturalne
structural monitoring
concrete dam
multivariate analysis
Opis:
Multivariate techniques are used in this study to analyze the monitoring data displacements of a concrete dam, measured by means of pendulums, extensometer bases and multiple rod extensometers, taking into account the action of environmental conditions, bounded by the surface temperature of the concrete at ambient temperature and the tank water level. The canonical correlation analysis is used to evaluate the influence of environmental variables in the displacement of structures and dam foundations. The factor analysis is used to identify data sources of variability and order the sensors according to the action of factors. The dates of the measurements are grouped according to similarities in the present observations, by applying the cluster analysis. Then the discriminant analysis is used to assess the groups as to their homogeneity. The results demonstrate that the techniques used for distinguishing the dam responses and identify the effects of changes in environmental conditions on the displacements of the structures and dam foundations.
Źródło:
International Journal of Applied Mechanics and Engineering; 2016, 21, 1; 107-120
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
BIBO stabilisation of continuous-time Takagi–Sugeno systems under persistent perturbations and input saturation
Autorzy:
Salcedo, J. V.
Martínez, M.
García-Nieto, S.
Hilario, A.
Powiązania:
https://bibliotekanauki.pl/articles/330698.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
linear matrix inequalities
fuzzy system
nonlinear system
input saturation
disturbance
liniowe nierówności macierzowe
układ rozmyty
układ liniowy
nasycenie wejściowe
Opis:
This paper presents a novel approach to the design of fuzzy state feedback controllers for continuous-time non-linear systems with input saturation under persistent perturbations. It is assumed that all the states of the Takagi–Sugeno (TS) fuzzy model representing a non-linear system are measurable. Such controllers achieve bounded input bounded output (BIBO) stabilisation in closed loop based on the computation of inescapable ellipsoids. These ellipsoids are computed with linear matrix inequalities (LMIs) that guarantee stabilisation with input saturation and persistent perturbations. In particular, two kinds of inescapable ellipsoids are computed when solving a multiobjective optimization problem: the maximum volume inescapable ellipsoids contained inside the validity domain of the TS fuzzy model and the smallest inescapable ellipsoids which guarantee a minimum *-norm (upper bound of the 1-norm) of the perturbed system. For every initial point contained in the maximum volume ellipsoid, the closed loop will enter the minimum *-norm ellipsoid after a finite time, and it will remain inside afterwards. Consequently, the designed controllers have a large domain of validity and ensure a small value for the 1-norm of closed loop.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2018, 28, 3; 457-472
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Availability and characteristics of the historical and recent aerial photographs and orthophotographs in Spain for the analysis of rill and gully erosion
Autorzy:
García, Jariego
Gutiérrez, Gómez
Lavado Contador, F.
Schnabel, S.
Powiązania:
https://bibliotekanauki.pl/articles/294358.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
rill and gully erosion
aerial photographs and orthophotograph
Spain
Opis:
Several kinds of methodologies and techniques have been used indeed in order to monitor rill and gully erosion processes. In this paper authors provide a guidance regarding the available aerial photographs and orthophotographs for rill and gully erosion studies in Spain and covering the whole country. A set of 8 different series of aerial photographs and orthophotographs were located in Spain. Their characteristics were quite diverse, differing in scales, formats and resolution. Most of the photographs and orthophotographs proved, at least, to be suitable for their use in studies of permanent gullies, allowing the monitoring of medium and long-term erosion rates since 1945.
Źródło:
Landform Analysis; 2011, 17; 51-55
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new titanosaur sauropod dinosaur from the Upper Cretaceous of North Patagonia, Argentina
Autorzy:
Filippi, L.S.
Garcia, R.A.
Garrido, A.C.
Powiązania:
https://bibliotekanauki.pl/articles/20301.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
new species
titanosaur
sauropod dinosaur
dinosaur
Upper Cretaceous
Cretaceous
North Patagonia
Argentina
paleontology
Sauropoda
Titanosauria
phylogenesis
Anacleto Formation
Neuquen basin
Narambuenatitan palomoi
Opis:
A new sauropod titanosaur from the Upper Cretaceous Anacleto Formation is described. Narambuenatitan palomoi gen. et sp. nov., is diagnosed by cranial and axial autapomorphies. The holotype, which represent a subadult individual, consists of the left premaxilla and maxilla, braincase, both quadrates, one cervical vertebrae, one dorsal vertebra, fragments of cervical and dorsal ribs, seventeen caudal vertebrae, caudal transverse processes, fragments of haemal arches, left sternal plate, right coracoid, left humerus, left ulnae, both pubes, iliac pedicel, proximal fragment of right ischia, and an incomplete left femur. The phylogenetic analysis indicates that Narambuenatitan is a non−eutitanosaurian lithostrotian, and that it shares with Epachthosaurus a neural spine in middle caudal vertebrae which are laminar and posteriorly elongated.
Źródło:
Acta Palaeontologica Polonica; 2011, 56, 3
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design, Manufacture and Characterization of an Acoustic Barrier Made of Multi-Phenomena Cylindrical Scatterers Arranged in a Fractal-Based Geometry
Autorzy:
Casteneira-Ibanez, S.
Rubio, C.
Romero-Garcia, V.
Sanchez-Perez, J. V.
Garcia-Raffi, L. M.
Powiązania:
https://bibliotekanauki.pl/articles/176662.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
acoustic arrays
acoustic attenuation
acoustic wave absorption
acoustic wave scattering
phononic crystals
acoustic barrier
physical effect of sound
Opis:
In this work we present the design and the manufacturing processes, as well as the acoustics standard- ization tests, of an acoustic barrier formed by a set of multi-phenomena cylindrical scatterers. Periodic arrangements of acoustic scatterers embedded in a fluid medium with different physical properties are usually called Sonic Crystals. The multiple scattering of waves inside these structures leads to attenuation bands related to the periodicity of the structure by means of Bragg scattering. In order to design the acoustic barrier, two strategies have been used: First, the arrangement of scatterers is based on fractal geometries to maximize the Bragg scattering; second, multi-phenomena scatterers with several noise con- trol mechanisms, as resonances or absorption, are designed and used to construct the periodic array. The acoustic barrier reported in this work provides a high technological solution in the field of noise control.
Źródło:
Archives of Acoustics; 2012, 37, 4; 455-462
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Air-spore in Cartagena, Spain: Viable and non-viable sampling methods
Autorzy:
Elvira-Rendueles, B.
Moreno, J.
Garcia-Sanchez, A.
Vergara, N.
Martinez-Garcia, M.J.
Moreno-Grau, S.
Powiązania:
https://bibliotekanauki.pl/articles/51349.pdf
Data publikacji:
2013
Wydawca:
Instytut Medycyny Wsi
Źródło:
Annals of Agricultural and Environmental Medicine; 2013, 20, 4
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new freshwater basal eucryptodiran turtle from the Lower Cretaceous of Spain
Autorzy:
Perez-Garcia, A.
De La Fuente, M.S.
Ortega, F.
Powiązania:
https://bibliotekanauki.pl/articles/20420.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
new genus
new species
freshwater turtle
eucryptodiran turtle
Lower Cretaceous
Cretaceous
paleontology
Spain
Testudines
Eucryptodira
Barremian
Las Hoyas
Opis:
A freshwater turtle from the lithographic limestone of Las Hoyas (Barremian of Cuenca, Spain) is described as a new genus and species of Eucryptodira, Hoyasemys jimenezi. The holotype consists of the skull, lower jaw, carapace, plastron, vertebral column, pectoral and pelvic girdle remains, and foreand hindlimbs. Hoyasemys jimenezi gen. et sp. nov. is characterized by three pairs of blind oblique depressions on the ventral surface of the basisphenoid, and a character combination composed, among others, of the articulation between the fourth and fifth cervical vertebrae through a cotyle in the fourth and a condyle in the fifth, amphicoelous caudal centra, and most digits of manus and pes with three elongated phalanges. This study allows clarification of the systematic position of a species of uncertain affinity often identified as “chelydroid” in appearance. A phylogenetic analysis shows Hoyasemys jimenezi gen. et sp. nov. forms a monophyletic group with Judithemys sukhanovi, Dracochelys bicuspis, Sinemys lens, and Ordosemys leios, collectively the sister group of crown Cryptodira.
Źródło:
Acta Palaeontologica Polonica; 2012, 57, 2
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The origin and development of a valley bottom gully in a small rangeland catchment : influences of land use in the growth model
Autorzy:
Gómez Gutiérrez, A.
Schnabel, S.
Lavado Contador, F.
Jariego García, A.
Powiązania:
https://bibliotekanauki.pl/articles/294651.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
gully erosion
aerial photographs and orthophotographs
land use and vegetation cover
Opis:
In the present paper, 8 aerial orthophotographs were used for analysing the evolution of a valley bottom gully and its relationship with land use and vegetation cover in SW Spain. In addition, the growth model observed was compared with the literature. Results showed an increase in the area affected by gullying during the period by 314 m2 and a clear relationship between the areas affected by gullying and land use intensity was found.
Źródło:
Landform Analysis; 2011, 17; 65-70
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new Eliomys from the Late Miocene of Spain and its implications for the phylogeny of the genus
Autorzy:
Mansino, S.
Garcia-Alix, A.
Ruiz-Sanchez, F.J.
Montoya, P.
Powiązania:
https://bibliotekanauki.pl/articles/21189.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Opis:
In this paper, we describe a previously unknown species of the glirid Eliomys from the Late Miocene and Early Pliocene Cabriel, Alcoy and Granada basins of southeastern Spain. Eliomys yevesi sp. nov. is characterized by its relative small size, narrow lingual wall and common presence of two centrolophs in the upper molars, and well-developed centrol-ophids in the lower molars. The new species is the probable ancestor of E. intermedius, which in turn represents the ancestor of the extant E. quercinus. According to its morphologic and biometric features, the origin of E. yevesi sp. nov. is likely to be found in some population of E. truci from the Late Miocene. Based on these affinities, we propose the lineage E. truci-E. yevesi sp. nov.-E. intermedius-E. quercinus, in which there is a trend towards the development of centrolophs, as well as the reduction of accessory crests.
Źródło:
Acta Palaeontologica Polonica; 2015, 60, 3
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Intradiurnal variations of allergenic tree pollen in the atmosphere of Toledo [Central Spain]
Autorzy:
Perez-Badia, R
Vaquero, C.
Sardinero, S.
Galan, C.
Garcia-Mozo, H.
Powiązania:
https://bibliotekanauki.pl/articles/50438.pdf
Data publikacji:
2010
Wydawca:
Instytut Medycyny Wsi
Tematy:
environmental exposure
Spain
Toledo city
tree pollen
allergenic pollen
atmosphere
aerobiology
atmospheric pollen
meteorology
intradiurnal variation
allergy
human disease
Źródło:
Annals of Agricultural and Environmental Medicine; 2010, 17, 2; 269-275
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microstructure and Properties of TiC/Ti Coatings Deposited by the Supersonic Cold Gas Spray Technique
Autorzy:
Kusiński, J.
Kac, S.
Kowalski, K.
Dosta, S.
Georgiou, E. P.
Garcia-Forgas, J.
Matteazzi, P.
Powiązania:
https://bibliotekanauki.pl/articles/356608.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cold gas spraying
Ti
TiC
CerMet coating
SEM
TEM
wear resistance
Opis:
Nanostructured, biocompatible, TiC/Ti Supersonic Cold Gas Sprayed coatings were deposited onto a Ti6Al4V alloy and their microstructure, wear resistance and hardness were investigated. The starting nanostructured powder, containing a varied mixture of Ti and TiC particles, was produced by high energy ball milling. Scanning and transmission electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray diffraction were used for structural and chemical analyses of powder particles and coatings. Coatings, 250-350 μm thick, preserving the nanostructure and chemical powder composition, with low porosity and relatively high hardness (~850 HV), were obtained. These nanostructured TiC/Ti coatings exhibited better tribological properties than commonly used biomedical benchmark materials, due to an appropriate balance of hard and soft nano-phases.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 2; 867-873
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pollen spectrum and risk of pollen allergy in Central Spain
Autorzy:
Perez-Badia, R
Rapp, A.
Morales, C.
Sardinero, S.
Galan, C.
Garcia-Mozo, H.
Powiązania:
https://bibliotekanauki.pl/articles/50546.pdf
Data publikacji:
2010
Wydawca:
Instytut Medycyny Wsi
Tematy:
aerobiology
atmospheric pollen
meteorology
pollen calendar
pollen allergy
allergy risk
pollinosis
Central Spain
Spain
Źródło:
Annals of Agricultural and Environmental Medicine; 2010, 17, 1; 139-151
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 23

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