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Wyszukujesz frazę "Ruiz, A." wg kryterium: Autor


Tytuł:
Determination of mechanical properties for wood pellets used in DEM simulations
Autorzy:
Gallego, E.
Fuentes, J.M.
Ruiz, A.
Hernandez-Rodrigo, G.
Aguado, P.
Ayuga, F.
Powiązania:
https://bibliotekanauki.pl/articles/2082921.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
biomass
wood pellets
mechanical properties
discrete element method
Opis:
Wood pellets are increasingly being used to produce energy as a part of the decarbonization process of the economy, but their handling is associated with several problems, which usually requires that the equipment used has to be modified and improved. The discrete element method is a numerical technique suitable for simulating individual particles and handling systems. This paper focuses on the determination of the mechanical and physical parameters for wood pellet particles which are required to develop a discrete element method model to improve handling and transport systems. This study reports the experimentally determined values for wood pellet particles with respect to particle density, modulus of elasticity, particle – particle and particle – wall coefficients of restitution, and particle – particle and particle – wall coefficients of friction. Following the previous findings by other researchers with large samples of bulk material, it has been found that the modulus of elasticity for individual wood pellets depends on the water content, and the particle – wall coefficient of restitution depends on the impact velocity.
Źródło:
International Agrophysics; 2020, 34, 4; 485-494
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An improved recommender system to avoid the persistent information overload in a university digital library
Autorzy:
Porcel, C.
Morales del Castillo, J. M.
Cobo, M. J.
Ruiz, A. A.
Herrera-Viedma, E.
Powiązania:
https://bibliotekanauki.pl/articles/970184.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
recommender systems
information overload
university digital libraries
fuzzy linguistic modeling
Opis:
Nowadays we are continuously bombarded with a lot of information, and because of it we have serious problems with accessing the relevant information, that is, we suffer from the information overload problems. Recommender systems have been applied successfully to avoid the information overload in different domains, but the number of electronic resources daily generated keeps growing and the problem rises again. Therefore, we find a persistent problem of information overload. In this paper we propose an improved recommender system to avoid the persistent information overload found in a University Digital Library. The idea is to include a memory to remember selected resources but not recommended to the user, and in such a way, the system could incorporate them in future recommendations to complete the set of filtered resources, for example, if there are a few resources to be recommended or if the user wishes output obtained by combination of resources selected in different recommendation rounds.
Źródło:
Control and Cybernetics; 2010, 39, 4; 899-923
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Isolation and purification of malate dehydrogenase in helminth parasites
Izolacja i oczyszczanie dehydrogenazy jabłczanowej robaków pasożytniczych
Autorzy:
Sanchez-Moreno, M.
Tejada, P.
Garcia-Ruiz, M.A.
Monteoliva, M.
Powiązania:
https://bibliotekanauki.pl/articles/836358.pdf
Data publikacji:
1988
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
isolation
purification
malate dehydrogenase
helminth parasite
parasite
Ascaris suum
Hymenolepis microstoma
Moniezia expansa
Opis:
Z homogenatów Ascaris suum, Fasciola hepatica i Moniezia expansa izolowano i oczyszczano dehydrogenazę jabłczanową (E.C.1.1.1.37) zarówno rozpuszczalną, jak i mitochondrialną, stosując wielokrotne, frakcjonowane wirowanie, a następnie chromatografię kolumnową na celulozie - DE-22 DEAE. W homogenatach wszystkich trzech pasożytów stwierdzono wysoką aktywność obu postaci MDH. Maksimum aktywności w przypadku A. suum i F. hepatica wyrażało się dwoma wierzchołkami, a w przypadku M. expansa jednym dla aktywności m-MDH i dwoma wierzchołkami dla s-MDH (ryc.). Stopień czystości obydwu postaci MDH okazał się różny, zależnie od gatunku pasożyta. Autorzy, na podstawie uzyskanych wyników, rozważają szlaki przemian energetycznych w organizmach badanych gatunków pasożytów.
Źródło:
Annals of Parasitology; 1988, 34, 2
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Isolation and purification of malate dehydrogenase in helminth parasites
Izolacja i oczyszczanie dehydrogenazy jabłczanowej robaków pasożytniczych
Autorzy:
Sanchez-Moreno, M.
Tejada, P.
Garcia-Ruiz, M.A.
Monteoliva, M.
Powiązania:
https://bibliotekanauki.pl/articles/2152590.pdf
Data publikacji:
1988
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
isolation
purification
malate dehydrogenase
helminth parasite
parasite
Ascaris suum
Hymenolepis microstoma
Moniezia expansa
Opis:
Z homogenatów Ascaris suum, Fasciola hepatica i Moniezia expansa izolowano i oczyszczano dehydrogenazę jabłczanową (E.C.1.1.1.37) zarówno rozpuszczalną, jak i mitochondrialną, stosując wielokrotne, frakcjonowane wirowanie, a następnie chromatografię kolumnową na celulozie - DE-22 DEAE. W homogenatach wszystkich trzech pasożytów stwierdzono wysoką aktywność obu postaci MDH. Maksimum aktywności w przypadku A. suum i F. hepatica wyrażało się dwoma wierzchołkami, a w przypadku M. expansa jednym dla aktywności m-MDH i dwoma wierzchołkami dla s-MDH (ryc.). Stopień czystości obydwu postaci MDH okazał się różny, zależnie od gatunku pasożyta. Autorzy, na podstawie uzyskanych wyników, rozważają szlaki przemian energetycznych w organizmach badanych gatunków pasożytów.
Źródło:
Wiadomości Parazytologiczne; 1988, 34, 2; 113-124
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Environmental changes during the last millennium recorded in subfossil Cladocera, diatoms and sediment geochemistry from Lake El Sol (Central Mexico)
Autorzy:
Zawisza, E.
Cuna, E.
Caballero, M
Ruiz-Fernandez, A. C.
Szeroczyńska, K.
Woszczyk, W.
Zawiska, I.
Powiązania:
https://bibliotekanauki.pl/articles/2060339.pdf
Data publikacji:
2017
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
crater Nevado de Toluca
lake sediments
tropical alpine lake
palaeolimnology
last millennium
Opis:
High-altitude lakes, which are very sensitive ecosystems and respond rapidly to climatic changes, are one of the best targets for palaeolimnological studies. Here, we present the record of environmental changes over the last millennium that are recorded in the sediments of El Sol, a tropical, high-altitude, volcanic crater lake on the Nevado de Toluca, Central Mexico. Palaeolimnological reconstructions are based on subfossil Cladocera, diatoms, magnetic susceptibility and chemical analysis of the sediments. In general, Cladocera occurring in tropical regions, and especially at high altitude, have been studied very little. Our data indicate that in the sequence studied, the species diversity of subfossil Cladocera is very low. Only four species were recorded, and the assemblage is dominated by littoral species. Two Cladocera taxa, Alona manueli and Ilyocryptus, found at Lake El Sol are endemic. Cladocera, diatoms and the sediment chemistry show changes in Lake El Sol which are mostly related to climate. The most pronounced climatic signal was obtained for the early Little Ice Age (1350–1625 AD). This cold episode was expressed by a reduction in the frequency of zooplankton (individuals/cm2/yr) and diatoms (valves/g of dry sediment) and by changes in the organic carbon content in the sediment. Our results show that human activity was very limited throughout the study period. According to historical data the presence of humans at the lake shore was mostly occasional, usually for ceremonial and ritual purposes, and humans did not have an important influence on the lake ecosystem. Only one period was identified when human activity was important. This period corresponds to the introduction of fish into the lake at the beginning of the 20th century.
Źródło:
Geological Quarterly; 2017, 61, 1; 81--90
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Land use changes and development of pi ping and gullies in Southeast Spain
Autorzy:
Romero-Díaz, A.
Alonso-Sarría, F.
Sánchez-Soriano, A.
Ruiz-Sinoga, J. D.
Powiązania:
https://bibliotekanauki.pl/articles/294639.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
land use changes
piping
gullies
semi-arid region
Spain
Opis:
In semiarid regions with low rainfall, poorly developed soils and marly lithologies, land abandonment leads to an increase in soil erosion and degradation processes. In some cases, the initiation of piping processes and the emergence of gullies takes place not long after its abandonment.
Źródło:
Landform Analysis; 2011, 17; 33-37
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:
Adsorption of arsenic on granular ferric hydroxide (GEH®). Impact of initial concentration of arsenic(V) on kinetics and equilibrium state
Autorzy:
Saldaña-Robles, A.
Márquez-Herrera, A.
Ruiz-Aguilar, G. M. L.
Flores-Ortega, A.
Saldaña-Robles, N.
Powiązania:
https://bibliotekanauki.pl/articles/207941.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
adsorption
groundwater
kinetics
adsorpcja
wody podziemne
kinetyka
Opis:
The present study discusses the adsorption kinetics of arsenic(V) on granular ferric hydroxide (GEH) and the GEH adsorption capacity for arsenic(V) at equilibrium. The impact of temperature on GEH adsorption capacity was studied, as well as the effects of the initial concentration of arsenic(V) and GEH concentration on the adsorption rates of arsenic(V). The Freundlich isotherm describes the arsenic(V) adsorption behavior reasonably well (r2 > 0.965). The adsorption kinetics was studied by fitting the experimental data to both first-order and second-order models. The maximum adsorption capacity of arsenic(V) on GEH was 2.701 mg·g–1, which is higher than the adsorption capacities of other adsorbents reported. The kinetics of arsenic(V) adsorption was well defined by the second-order model, with the correlation coefficients in the range of 0.960–0.987. This study shows that due to its properties, GEH is a good candidate for removal of arsenic(V) from groundwater.
Źródło:
Environment Protection Engineering; 2018, 44, 3; 51-62
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Gullies development in afforested slopes in Southeastern Spain
Autorzy:
Ruiz-Sinoga, J. D.
Romero-Díaz, A.
Belmonte-Serrato, F.
Alonso-Sarría, F.
Powiązania:
https://bibliotekanauki.pl/articles/295162.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
afforestation
gullies
erosion rates
marls
semi-arid region
Spain
Opis:
In semiarid regions, the main purpose of afforestation has been to provide a protective vegetative cover in order to prevent or reduce soil erosion. This paper shows the results of a study carried out in some areas afforested in the 1970s, in steep slopes and mostly in marls. Afforestation where performed using terraced with subsoiling, so the existing scrub vegetation was removed and Pinus halepensis was planted. The main conclusion is that human action developed in this semi-arid territory, perhaps because the technique applied was not the most suitable for afforestation, has led to the geomorphological activation of the slopes and the emergence and large development of gullies.
Źródło:
Landform Analysis; 2011, 17; 173-176
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Gully erosion control and carbon sequestration through filter dams in three different land uses
Autorzy:
Andrade-Limas, E.
Espinosa-Ramírez, M.
Ruiz-Sinoga, J. D.
Romero-Díaz, A.
Powiązania:
https://bibliotekanauki.pl/articles/294707.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
carbon sequestration
filter dams
gullies
land uses
Tamulipas
Mexico
Opis:
The object of this study was to compare and quantify carbon sequestration and erosion control in two type soil and three land uses. Direct measurements of sediment retained in dams with mesh and branches have been taken. In conclusion it may indicate that these dams are an efficient filter control on gully erosion, which is higher in cropland. The capture of organic carbon was higher in natural vegetation due to higher content of organic matter in soil.
Źródło:
Landform Analysis; 2011, 17; 87-89
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of pro- and anti-inflammatory interleukins in the mammary gland of goats experimentally infected with Staphylococcus chromogenes
Autorzy:
Ruiz-Romero, R.A.
Martínez-Gómez, D.
Cervantes-Olivares, R.A.
Díaz-Aparicio, E.
Ducoing-Watty, A.E.
Powiązania:
https://bibliotekanauki.pl/articles/2087265.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
mastitis
Staphylococcus chromogenes
goats
qRT-PCR
interleukins
Źródło:
Polish Journal of Veterinary Sciences; 2020, 23, 4; 511-519
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Gullies and badland landscapes in Neogene basins, region of Murcia, Spain
Autorzy:
Alonso-Sarria, F.
Romero-Díaz, A.
Ruíz-Sinoga, J. D.
Belmonte-Serrato, F.
Powiązania:
https://bibliotekanauki.pl/articles/295156.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
Neogene basins
badland
gullies
semi-arid region
Spain
Opis:
The area occupied by gullies and ravines in Murcia Region is 161,028 hectares, representing 14.63%. The origin of these erosive forms are related to several factors such as : lithological and stratigraphic features, mineralogy and geochemistry of the sediments, tectonics, climatic characteristics, low vegetation cover and poorly developed soils.
Źródło:
Landform Analysis; 2011, 17; 161-165
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A small camelid Hemiauchenia from the Late Pleistocene of Hidalgo, central Mexico
Autorzy:
Bravo-Cuevas, V.M.
Jimenez-Hidalgo, E.
Cuevas-Ruiz, G.E.
Cabral-Perdomo, M.A.
Powiązania:
https://bibliotekanauki.pl/articles/22741.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
small camelid
camelid
Hemiauchenia
Late Pleistocene
Hidalgo
Mexico
Camelidae
Pleistocene
paleontology
geological setting
systematics
mandible
dentition
postcranial bone
remains
tooth
fossil
Opis:
Pleistocene camels from Mexico include representatives of llamas and camels. Their record spans from the Early Blancan to the Late Pleistocene, based on several localities in the northern, northwestern and central parts of the country, with members of the genus Hemiauchenia being particularly well represented. New specimens of a small llama, collected in the state of Hidalgo, central Mexico, are assigned to Hemiauchenia gracilis owing to a combination of cranial and postcranial characters, including a short upper premolar−molar series, the presence of a two−rooted P3, molars covered by a thin layer of cementum, U−shaped molar crescents, well−developed styles and ribs, a small degree of crenulation, a relatively short lower tooth row, the lack of p1 and p3, weakly developed anteroexternal stylids, a shallow and slender mandible, and long and slender metatarsals and phalanges. The material described here extends the Pleistocene geographic distribution of H. gracilisfrom northern to central Mexico, and its biochronological range from the Early Blancan to the Late Pleistocene (Rancholabrean), thus making it the southernmost record and the geochronologically youngest occurrence of this species in North America. The mesowear pattern of the material from Hidalgo suggests that these animals were mainly browsers. Their estimated body mass resembles that of Blancan specimens from Guanajuato, implying that this species maintained approximately the same body mass throughout its biochronological range in central Mexico.
Źródło:
Acta Palaeontologica Polonica; 2012, 57, 3
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High performance quantum key distribution prototype system using a commercial off-the-shelf solution: experimental and emulation demonstrations
Autorzy:
Lopez-Leyva, J. A.
Ruiz-Higuera, J.
Arvizu-Mondragon, A.
Santos-Aguilar, J.
Ramos-Garcia, R.
Ponce-Camacho, M.
Powiązania:
https://bibliotekanauki.pl/articles/174150.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
quantum cryptography
final secret key rate
FSecKR
coherent states
Opis:
A continuous variable-quantum key distribution system prototype that uses weak coherent states with a diffused phase, commercial off-the-shelf devices, complete free space 90-degrees hybrid and simplified quantum protocol is proposed in this paper. In general, the quantum transmitter-receiver shows an experimental average quantum bit error rate of 30% using auto-homodyne detection with 0.25 photons per pulse in locking phase mode. The emulated final secret key rate measurements were 20 and 40 Kbps for minimum (30 Mbps) and maximum (90 Mbps) throughput, respectively, in a real traffic network using databases for the quantum keys generated by two true random number generators.
Źródło:
Optica Applicata; 2017, 47, 3; 411-419
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Unconformity surfaces in pelagic carbonate environments : A case from the Middle Bathonian of the Betic Cordillera, SE Spain
Autorzy:
Nieto, L. M.
Rodríguez-Tovar, F. J.
Molina, J. M.
Reolid, M.
Ruiz-Ortiz, P. A.
Powiązania:
https://bibliotekanauki.pl/articles/191710.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
Unconformity
pelagic swell
softground
firmground
hardground
Middle-Late Jurassic
Betic External Zone
Opis:
Integrative studies of sedimentary and palaeontological topics for unconformity surfaces are useful in basin analysis. A middle Bathonian unconformity surface in the Ammonitico Rosso facies cropping out in the La Mola Unit (Subbetic Domain, Betic External Zone) was studied by integrating ichnological, palaeotectonic, and sedimentological analyses to decipher sea-level, tectonic, and palaeogeographic conditions during its development. The trace-fossil assemblage mainly consists of the Glossifungites (Thalassinoides, Arenicolites, and Gastrochaenolites) and Trypanites ichnofacies elements. Probable Ophiomorpha represents previous softground stages, Thalassinoides and Arenicolites were formed in firmground, Gastrochaenolites reflects an evolved firmground or early hardground, and Trypanites can be attributed to an incipient hardground. The degree of firmness, relative sea-level position, and continuity of deposition were related. The softground stage corresponds to a fall in relative sea level and continued deposition. The firmground (semi-consolidated substrate) probably reflects an extremely low sea level characterized by non-deposition, whereas the incipient hardground stage indicates an initial phase of relative sea-level rise, with an increase in marine current energy. The presence of two neptunian dyke systems reflects significant tectonic activity related to the transtensional deformation that affected the South Iberian Palaeomargin. Lateral variations in sedimentological and ichnological features recorded at similar discontinuity surfaces in nearby areas were considered and related to differences in bottom topography, with associated changes in sedimentation, and to the variable duration of the hiatus.
Źródło:
Annales Societatis Geologorum Poloniae; 2014, 84, 3; 281-295
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł

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