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    Wyświetlanie 1-56 z 56
    Tytuł:
    Dolbeault homotopy theory and compact nilmanifolds
    Autorzy:
    Cordero, L.
    Fernández, M.
    Gray, A.
    Ugarte, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1341819.pdf
    Data publikacji:
    1998
    Wydawca:
    Polska Akademia Nauk. Instytut Matematyczny PAN
    Opis:
    In this paper we study the degeneration of both the cohomology and the cohomotopy Frölicher spectral sequences in a special class of complex manifolds, namely the class of compact nilmanifolds endowed with a nilpotent complex structure. Whereas the cohomotopy spectral sequence is always degenerate for such a manifold, there exist many nilpotent complex structures on compact nilmanifolds for which the classical Frölicher spectral sequence does not collapse even at the second term.
    Źródło:
    Banach Center Publications; 1998, 45, 1; 137-154
    0137-6934
    Pojawia się w:
    Banach Center Publications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Occupational exposure to carbon dioxide, ammonia and hydrogen sulphide on livestock farms in north-west Spain
    Autorzy:
    Barrasa, M.
    Lamosa, S.
    Fernandez, M.D.
    Fernandez, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/52212.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Medycyny Wsi
    Opis:
    The influence of the type of farming on harmful gas exposures to carbon dioxide (CO2), ammonia (NH3) and hydrogen sulfide (H2S) was assessed from the perspective of animal welfare and occupational hygiene. Summer data of H2S, NH3 and CO2 concentrations and of environmental parameters were collected from 31 farms. The indices of exposure for longterm exposures to NH3 suggest the lowest acceptability of exposure was observed on poultry farms. CO2 had the highest dependence on production activity. For H2S, no differences were found based on farming activity. Both the stocking density and volume of air available affected the daily exposure and the index of exposure to CO2. Significant differences were observed between hourly CO2 concentrations, depending on the level of activity inside the building. A positive correlation was found between gas concentrations and temperature increase. All values of daily and short-term exposures were below exposure limit values, which suggests that exposure conditions were appropriate for workers’ health during the measurement period. Analysis of the working hours and average hourly concentration of gases during the times of day, with presence of workers inside the farm buildings, revealed significant differences for CO2.
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2012, 19, 1
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Is the polycentrism a desirable feature in the construction of sustainable residential environments? : revisiting its conceptualization from the travel-to-work perspective: an analysis for the biggest metropolitan areas in Spain
    Autorzy:
    Marmolejo Duarte, C.
    Ruiz Estupiñán, N.
    Tornés Fernández, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/345157.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Krakowska im. Tadeusza Kościuszki. Wydział Architektury. Katedra Kształtowania Środowiska Mieszkaniowego
    Tematy:
    urban structure
    polycentrism
    polycentricity
    residential environment
    metropolitan areas
    Spain
    struktura miejska
    policentryzm
    policentryczność
    środowisko mieszkaniowe
    obszary metropolitalne
    Hiszpania
    Opis:
    The urban form is an important issue on explaining quality of life or housing environments, since it has implications in terms of social, environmental and economic aspects. In this paper, taking as case study the seven biggest metropolitan areas in Spain, we explore whether urban form, understood as polynucleation (morphological) is related to polycentricity (functional) understood as the level of interconnections depicted by journey-to-work mobility. We found a high correlation between the morphological and functional sides of polycentrism, nonetheless, polycentricity succeed in understanding the kind of relations among subcenters, namely it permits to foreseen the kind of transportation systems needed in each of the studied cities. In terms of social, economic and environmental sustainability, it is exposed the discussion on whether a high level of polynucleation and interlinking would be more desirable in the construction of the house of tomorrow.
    Źródło:
    Środowisko Mieszkaniowe; 2013, 11; 99-108
    1731-2442
    2543-8700
    Pojawia się w:
    Środowisko Mieszkaniowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Systematic revision of a Miocene sperm whale from Patagonia, Argentina, and the phylogenetic signal of tympano-periotic bones in Physeteroidea
    Autorzy:
    Paolucci, F.
    Buono, M.R.
    Fernandez, M.S.
    Cuitino, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082284.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Mammalia
    Physeteroidea
    Preaulophyseter gualichensis
    Miocene
    Patagonia
    Argentina
    Opis:
    Sperm whales (Physeteroidea) include today only two genera of morphologically disparate odontocetes: the largest toothed whale known (Physeter macrocephalus) and small sized forms (Kogia spp.). In contrast, their fossil record indicates a high diversity for the group during the Miocene, with over 20 species recognized. Miocene marine sediments from Patagonia (Argentina) record this diversity, including at least five species. Among them, Preaulophyseter gualichensis, from the Miocene of Gran Bajo del Gualicho Formation, has been one of the most enigmatic. Despite the fragmentary nature of the type and referred materials (isolated teeth and periotics), which casts some doubts on its validity, this species has not been revised since its original description. In this contribution, we re-describe the materials referred to P. gualichensis, revise the taxonomic status of the species and evaluate the phylogenetic signal of ear bones among Physeteroidea. Our results indicate that the physeteroid tympano-periotic complex morphology is poorly diagnostic at the species level. Intraspecific variation (including ontogeny and sexual dimorphism) and/or taphonomic processes cannot be ruled out as the causes of the minor differences observed among specimens. We suggest that sperm whale tympano-periotics retain many plesiomorphic characters and are diagnostic only between kogiids and non-kogiid physeteroids. Based on the fragmentary and isolated state of the studied specimens, and the lack of diagnostic characters in both teeth and periotics, we consider P. gualichensis as nomen dubium and we re-assign the referred specimens as Physeteroidea indet. A conservative morphology of the tympano-periotic and, to a lesser extent, the nasal complex in sperm whales, might result from the morpho-functional constraints imposed by a highly specialized but successful echolocation system.
    Źródło:
    Acta Palaeontologica Polonica; 2021, 66, 1; 63-76
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of microbial consortium in the production of China aster and gaillardia seedlings
    Autorzy:
    Fernandez, M.
    Nachu, N.S.
    Revanna, A.
    Bagyaraj, J.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1077469.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Ogrodnictwa
    Tematy:
    China aster
    gaillardia seedling
    flowering plant
    inoculation
    arbuscular mycorrhizal fungi
    Funneliformis mosseae
    Bacillus sonorensis
    plant growth-promoting rhizobacteria
    Opis:
    China aster and gaillardia are flowering plants with high economic importance in floriculture. In the present investigation, response of China aster and gaillardia seedlings to inoculation with the arbuscular mycorrhizal fungus Funneliformis mosseae + the plant growth-promoting rhizobacterium Bacillus sonorensis was studied by growing in multipots (pro trays). The germination percentage and plant growth parameters: length of shoots, roots and whole seedlings, stem diameter, biovolume index, plant strength, vigor index, dry weight and nutrient uptake, were analyzed 60 days after sowing. The microbial parameters, mycorrhizal root colonization and spore count, and the population of B. sonorensis in the substrate were also determined. The results brought out that growth of inoculated seedlings was significantly improved as compared to uninoculated seedlings. Based on the plant growth and microbial parameters studied, it was concluded that inoculating the substrate in pro trays with the microbial consortium results in producing vigorously growing seedlings.
    Źródło:
    Journal of Horticultural Research; 2020, 28, 2; 21-28
    2300-5009
    Pojawia się w:
    Journal of Horticultural Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Impact of subsidies in agriculture on the value of fixed assets on agricultural farms in Poland and Spain in light of FADN data in the years 2004-2016
    Wpływ subwencji w rolnictwie na wartość środków trwałych w gospodarstwach rolnych w Polsce i w Hiszpanii w świetle danych FADN w latach 2004-2016
    Autorzy:
    Węgrzyńska, M.
    Fernandez, P.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1790456.pdf
    Data publikacji:
    2019
    Wydawca:
    The Polish Association of Agricultural and Agribusiness Economists
    Tematy:
    środki trwałe w rolnictwie
    FADN
    rachunkowość rolna
    subwencje w rolnictwie
    fixed assets in agriculture
    agricultural accounting
    subsidies in agriculture
    Opis:
    The article presents changes in the value of fixed assets in relation to the amounts of subsidies directed to farms in two selected European Union countries – Poland and Spain – in the years 2004-2016. Both of these countries were selected on the basis of similar qualitative and quantitative characteristics that are characteristic of agriculture. An additional determinant of the choice of these countries was a similar economic situation before and after accession to the structures of the European Union. The article consists of an introduction, where the essence and significance of fixed assets in agriculture is presented, followed by the material and methodology of the research. A comparison of fixed assets of both countries was based on statistical data from the European Farm Accountancy Data Network (FADN). Analysis of material shows that, in 2004-2016, in Poland and Spain, the value of fixed assets was strongly positively correlated with total subsidies – excluding subsidies on investment (SE605), total direct payments (SE606), subsidies on intermediate consumption (SE625) and decoupled payments (SE630). Additionally, it was determined that, in Poland and Spain, the value of fixed assets was strongly negatively correlated with total subsidies on crops (SE610) and other subsidies (SE699). The value of property, plant and equipment in Poland and Spain increased gradually during the period under review.
    W artykule określono zmiany wartości środków trwałych w odniesieniu do kwot subwencji kierowanych do gospodarstw rolnych w dwóch wybranych krajach Unii Europejskiej – Polsce i Hiszpanii – w latach 2004-2016. Oba te kraje zostały wybrane na podstawie zbliżonych cech jakościowych i ilościowych charakterystycznych dla rolnictwa. Dodatkową determinantą wyboru tych krajów była podobna sytuacja ekonomiczna przed i po przystąpieniu tych krajów do Unii Europejskiej. Porównanie środków trwałych obu krajów oparto na danych statystycznych pochodzących z European Farm Accountancy Data Network (FADN). Z analizy materiału wynika, że w latach 2004-2016 w Polsce i w Hiszpanii wartość środków trwałych była silnie dodatnio skorelowana z dopłatami do działalności operacyjnej (SE605), płatnościami bezpośrednimi (SE606), dopłatami do zużycia bezpośredniego (SE625), a także z jednolitymi płatnościami obszarowymi oraz dodatkowymi płatnościami (SE630). Dodatkowo określono, że w Polsce i w Hiszpanii wartość środków trwałych była silnie ujemnie skorelowana z dopłatami do produkcji roślinnej (SE610) oraz pozostałymi dopłatami (SE699). Wartość środków trwałych w Polsce i w Hiszpanii w okresie objętym badaniem ulegała sukcesywnemu zwiększeniu.
    Źródło:
    Annals of The Polish Association of Agricultural and Agribusiness Economists; 2019, 21, 4; 551-560
    2657-781X
    2657-7828
    Pojawia się w:
    Annals of The Polish Association of Agricultural and Agribusiness Economists
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Minimal Decision Rules Based on the Apriori Algorithm
    Autorzy:
    Fernandez, M. C.
    Menasalvas, E.
    Marban, O.
    Pena, J. M.
    Millan, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/908364.pdf
    Data publikacji:
    2001
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    baza danych
    algorytmy
    rough sets
    rough dependencies
    association rules
    a priori algorithm
    minimal decision rules
    Opis:
    Based on rough set theory many algorithms for rules extraction from data have been proposed. Decision rules can be obtained directly from a database. Some condition values may be unnecessary in a decision rule produced directly from the database. Such values can then be eliminated to create a more comprehensible (minimal) rule. Most of the algorithms that have been proposed to calculate minimal rules are based on rough set theory or machine learning. In our approach, in a post-processing stage, we apply the Apriori algorithm to reduce the decision rules obtained through rough sets. The set of dependencies thus obtained will help us discover irrelevant attribute values.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2001, 11, 3; 691-704
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Role of NADPH oxidase in the regulation of peroxisome dynamics
    Autorzy:
    Rodriguez-Serrano, M.
    Romero-Puerta, M.
    Sanz-Fernandez, M.
    Cardenas, K.
    Sandalio, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/81177.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    conference
    reactive oxygen species
    signalling network
    peroxisome dynamics
    NADPH oxidase
    Arabidopsis
    oxidative stress
    Źródło:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 2
    0860-7796
    Pojawia się w:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New Eocene South American native ungulates from the Quebrada de los Colorados Formation at Los Cardones National Park, Argentina
    Autorzy:
    Fernandez, M.
    Zimicz, A.N.
    Bond, M.
    Chornogubsky, L.
    Arnal, M.
    Cardenas, M.
    Fernicola, J.C.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082287.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Mammalia
    South American native ungulates
    Casamayoran SALMA
    Paleogene
    Quebrada de Los
    Colorados Formation
    Argentina
    Opis:
    In the last few years, the Quebrada de Los Colorados Formation has become an important middle Eocene fossiliferous unit in Northwestern Argentina. In this unit, the South American native ungulates were until now only represented by the order Notoungulata, including one family of Typotheria and three of Toxodontia. In this contribution, we present a new faunistic assemblage of South American native ungulates, collected from outcrops of the Quebrada de Los Colorados Formation at Los Cardones National Park, Calchaquí Valleys, Salta Province (Argentina). This new assemblage is constituted by the following taxa: litoptern Didolodontidae cf. Ernestokokenia sp., Astrapotheria indet., and notoungulate Notostylopidae Homalostylops sp., a ?Homalostylops sp., typothere “Oldfieldthomasiidae” Colbertia falui sp. nov., Colbertia lumbrerense, and Colbertia sp. and toxodont “Notohippidae” Pampahippus secundus. Colbertia falui sp. nov. differs from the other species of Colbertia by the following features: lower cheek teeth with both more labially angular and oblique trigonid; lower premolars more labio-lingually compressed; with proportionally larger trigonid, and shorter talonid; ectoflexid transversally deeper; lower molars with a more developed paralophid, and more expanded metalophid and entoconid; the latter is located in a more mesial position, being closer to the metaconid; deep and lingually narrower talonid basin; disto-lingual sulcus transversally shallower; more developed cingulids; and m3 with less lingually projected hypoconulid. This new fauna markedly increases the taxonomic richness known for this formation since it includes the first mention of notostylopids, “oldfieldthomasiids”, litoptern didolodontids, and astrapotheres. With the current evidence, we postulate an ungulate migration from Patagonia to Northwestern Argentina during the Eocene. We also hypothesize that the observed taxonomic differences among the Quebrada de Los Colorados, Geste, and Lumbrera formations are more probably associated to orogenic factors that have regulated the faunal dynamic in Northwestern Argentina during the Paleogene than to a differential sampling effort or taphonomic biases.
    Źródło:
    Acta Palaeontologica Polonica; 2021, 66, 1; 85-97
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zastosowanie nowoczesnych cieczy roboczych w chwytakach robotów
    Autorzy:
    Osowski, K.
    Fernández, M. A.
    Olszak, A.
    Huang, C. Y.
    Kęsy, A.
    Chang, J. Y.
    Kęsy, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/305102.pdf
    Data publikacji:
    2018
    Wydawca:
    Wydawnictwo Druk-Art
    Tematy:
    chwytaki
    sprzęgła wiskotyczne
    ciecz elektroreologiczna
    ciecz magnetoreologiczna
    grasper
    viscous coupling
    electro-medical liquid
    magnetorheological fluid
    Opis:
    W artykule omówiono wykorzystanie cieczy o nietypowych właściwościach w chwytakach robotów. Ciecze elektro- i magnetoreologiczne, zmieniające swoje właściwości reologiczne w obecności pola elektrycznego lub magnetycznego, zastosowano jako ciecze robocze sprzęgieł wiskotycznych, wchodzących w skład układu przeniesienia napędu chwytaków. Przedstawiono dwa rozwiązania konstrukcyjne prototypowych chwytaków robotów przemysłowych z takimi sprzęgłami. Rozważono również ciecze luminescencyjne, reagujące na nacisk, pod kątem ich zastosowania w mikroczujnikach siły nacisku szczęk chwytaka.
    The paper discusses the use of modern fluids with untypical properties in robot grippers. The electro- and magnetorheological fluids, changing their rheological properties in the presence of an electric or magnetic field, were used as working fluids of viscous clutches included in the griper drive transmission system. Two design solutions were presented for prototype industrial robot grippers with such clutches. Luminescent pressure-sensitive fluids have also been considered for their use in the micro-sensors for sensing force of the gripper’s jaw.
    Źródło:
    Napędy i Sterowanie; 2018, 20, 3; 100-106
    1507-7764
    Pojawia się w:
    Napędy i Sterowanie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New BOF slags containing sodium and manganese
    Nowe rodzaje żużla konwertorowego zawierające sód i mangan
    Autorzy:
    Barbes Fernandez, M. F.
    Marinas Garcia, E.
    Verdeja Gonzales, L. F.
    Garcia Carcedo, F.
    Ruiz-Bustinza, I.
    Karbowniczek, M.
    Migas, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/263936.pdf
    Data publikacji:
    2011
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    metoda BOF
    żużel konwertorowy
    sód
    mangan
    BOF
    slag
    sodium
    manganese
    Opis:
    The nature and properties of slag and dust generated during the manufacture of pig iron indicate the two possibilities of their utilization: sintering or cold agglomerating with Portland cement. Both sinter and pellets can be recycled in the LD converter. It was introduced the concept of "preformed synthetic slag" to use the recycling of waste. If the material contains components forming the eutectic properties similar to sinter or pellet (obtained outside the converter) it stimulates the creation of slag in the LD converter.The aim of this research is to address the best way to deal with manganese before the molten metal reaches the final stage of temperature and composition for casting. Ideally, the composition of the slag and dust produced by the BOF-LD can be adjusted so that the molten metal that reaches the secondary metallurgy contains over 1.0% manganese.
    Charakter i możliwosci żużla i płynów powstających podczas wytwarzania surówki wskazują na dwie możliwości ich utylizacji: spiekanie lub aglomeracja z cementem portlandzkim. Zarówno spiek, jak i brykiety mogą być poddawane recyklingowi w konwertorze LD. Wprowadzono koncepcję "preformed synthetic slag" do zastosowania recyklingu odpadów. Jeśli ten materiał zawiera składniki tworzące eutektykę z własnościami podobnymi do spieku lub pelet (uzyskanych poza konwertorem), to aktywizuje proces tworzenia żużla w konwertorze LD. Celem niniejszych badań jest znalezienie najlepszego sposobu radzenia sobie z manganem, zanim ciekły metal osiągnie końcowe parametry temperatury i składu do odlewania. Najlepiej gdy skład żużla i wytwarzanego przez konwertor pyłu mogą być dostosowane tak, aby ciekły metal, który trafia do obróbki pozapiecowej, zawierał ponad 1,0% manganu.
    Źródło:
    Metallurgy and Foundry Engineering; 2011, 37, 2; 133-138
    1230-2325
    2300-8377
    Pojawia się w:
    Metallurgy and Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Incidence of fungals in a vineyard of the denomination of origin ribeiro [Ourense - North-Western Spain]
    Autorzy:
    Fernandez-Gonzales, M
    Rodriguez-Rajo, F.J.
    Jato, V.
    Aira, M.J.
    Powiązania:
    https://bibliotekanauki.pl/articles/49264.pdf
    Data publikacji:
    2009
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    wine production
    vineyard location
    North-Western Spain
    Spain
    fungal disease
    grape harvest
    grey mould
    Botrytis cinerea
    powdery mildew
    Uncinula necator
    downy mildew
    Plasmopara viticola
    aerobiology
    grape-vine
    fungal spore
    atmosphere
    spore concentration
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2009, 16, 2; 263-271
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prediction of biological sensors appearance with ARIMA models as a tool for Integrated Pest Management protocols
    Autorzy:
    Fernandez-Gonzalez, M.
    Ramos-Valcarcel, D.
    Aira, M.J.
    Rodriguez-Rajo, F.J.
    Powiązania:
    https://bibliotekanauki.pl/articles/50204.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Medycyny Wsi
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2016, 23, 1
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New findings of airborne fungal spores in the atmosphere of Havana, Cuba, using aerobiological non-viable methodology
    Autorzy:
    Almaguer-Chaves, M.
    Aira, M.J.
    Rojas, T.-I.
    Fernandez-Gonzalez, M.
    Rodriguez-Rajo, F.-J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2081740.pdf
    Data publikacji:
    2018
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    airborne fungal spores
    non-viable methodology
    Havana
    Cuba
    Opis:
    Introduction. Although airborne fungal diversity in tropical countries is known to be considerable, aerobiological research to-date has identified only a part of the fungal mycobiota that may have an impact both on human health and on crops. Previous studies in Havana city identified only 30 genera and 5 spore types; therefore,new research is required in these latitudes. This study sought to investigate airborne spore levels in Havana, with a view to learning more about local fungal diversity and assessing its influence in quantitative terms. Materials and method. A Hirst type volumetric sampler was located on the rooftop of a building 35 meters above ground level, in a busy area of the city. Sampling was carried out continuously (operating 24hours/day), at 10 L per minute during the year 2015. The fungal spores were collected on a Melinex tape coated with a 2% silicone solution. The results were expressed as spores per cubic meter (spores/m3) of air when to referring to daily values, and spores count if referring to annual value. Results. Fourteen new genera were identified in the course of volumetric sampling: six produce ascospores and eight conidia. Morphobiometric characteristics were noted for all genera, and airborne concentrations were calculated. These genera accounted for 56.4% of relative fungal frequency over the study year. Conclusions. Many airbone fungi are primary causes of both respiratory disease and crop damage. These new findings constitute a major contribution to Cuba’s aerobiological database.
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2018, 25, 2; 349-359
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thirty-four identifiable airborne fungal spores in Havana, Cuba
    Autorzy:
    Almaguer, M.
    Aira, M.-J.
    Rodriguez-Rajo, F.J.
    Fernandez-Gonzalez, M.
    Rojas-Flores, T.I.
    Powiązania:
    https://bibliotekanauki.pl/articles/51658.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Medycyny Wsi
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2015, 22, 2
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Forecasting ARIMA models for atmospheric vineyard pathogens in Galicia and Northern Portugal: Botrytis cinerea spores
    Autorzy:
    Fernandez-Gonzalez, M.
    Rodriguez-Rajo, F.J.
    Jato, V.
    Aira, M.J.
    Ribeiro, H.
    Oliveira, M.
    Abreu, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/49793.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Medycyny Wsi
    Opis:
    Botrytis cinerea is the cause of the most common disease in the Galician and Portuguese vineyards. Knowledge of the spore levels in the atmosphere of vineyards is a tool for forecasting models of the concentration of spores in order to adjust the phytosanitary treatments to real risk infection periods. The presented study was conducted in two vineyards, one located in Cenlle (Spain) and other in Amares (Portugal), from 2005-2007. A volumetric trap, model Lanzoni VPPS-2000, was used for the aerobiological study. Phenological observations were conducted on 20 vines of three grape varieties in Cenlle (Treixadura, Godello and Loureira) and in Amares (Trajadura, Loureiro and Pedernã), by using the BBCH scale. The highest total spore concentrations during the grapevine cycle were recorded in 2007 in both locations (Cenlle:16,145 spores; Amares:1,858 spores), and the lowest, in 2005 in Cenlle (1,700 spores) and in Amares (800 spores) in 2006. In Cenlle, the best adjusted model was an ARIMA (0,2,2), including the relative humidity four days earlier, while in Amares there was an ARIMA (1,2,3), considering the relative humidity three days earlier and rainfall two days earlier. The t-test showed no significant difference between observed and predicted data by the model.
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2012, 19, 2
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of the winter phytoplankton bloom on the settled material in a temperate shallow estuary
    Autorzy:
    Guinder, V.A.
    Lopez-Abbate, M.C.
    Berasategui, A.A.
    Negrin, V.L.
    Zapperi, G.
    Pratolongo, P.D.
    Fernandez Severini, M.D.
    Popovich, C.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/47931.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    phytoplankton bloom
    chlorophyll a
    sediment trap
    resuspension
    shallow estuary
    pelagic food web
    nutrient concentration
    particulate organic matter
    coastal environment
    Źródło:
    Oceanologia; 2015, 57, 1
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Second-order optimality conditions for semilinear elliptic control problems with constraints on the gradient of the state
    Autorzy:
    Casas, E.
    Fernandez, J.
    Mateos, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/206719.pdf
    Data publikacji:
    1999
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    sterowanie optymalne
    optimal control
    second order conditions
    semilinear elliptic PDE
    state gradient constraints
    Opis:
    The aim of this paper is to state the second order necessary and sufficient optimality conditions for distributed control problems governed by the Neumann problem associated to a semilinear elliptic partial differential equation. Bound constraints ou control are considered, as well as equality and inequality constraints of integral type on the gradient of the state.
    Źródło:
    Control and Cybernetics; 1999, 28, 3; 463-479
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Incrustation of alpha-particle emitters in the source backing: influence on activity measurements
    Autorzy:
    Jurado-Vargas, M.
    Fernández-Timón, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/146904.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    alpha-particle spectrometry
    Monte Carlo (MC) simulation
    SRIM
    Opis:
    Alpha particles emitted from radioactive sources are often measured using a 2pi counting geometry in order to determine the activity with a low deviation. The ratio C2pi/A (counting rate/activity) can, however, deviate from the theoretical value of 0.5 because of backscattering in the backing material, scattering and absorption of alpha particles in the source. The experimental counting rates are, therefore, corrected for these effects (backscattering for all sources, plus self-absorption for sources of non-negligible thickness) to determine the real source activity. However, the corrections needed for situations corresponding to alpha-particle sources in which the radionuclides are not deposited but incrusted in the backing material have not been considered. The aim of the present work was therefore to study the influence that incrustation in the backing can have on the total detection efficiency, and hence on the activity estimated for the source. To this end, we used the Monte Carlo computer code SRIM to model the behaviour of the alpha particles in the backing material.
    Źródło:
    Nukleonika; 2012, 57, 4; 569-573
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    500 years of ecological changes recorded in subfossil Cladocera in a high-altitude, tropical lake Lago de la Luna, central Mexico
    Autorzy:
    Zawisza, E.
    Caballero, M.
    Ruiz-Fernandez, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/2027080.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    subfossil Cladocera
    crater Nevado de Toluca
    lake sed i ment
    Opis:
    We pres ent the last 500 years of his tory of a high-al ti tude trop i cal lake Lago de la Luna lo cated at Nevado de Toluca crater, Cen tral Mex ico, based on subfossil Cladocera anal y sis. Through the stud ied sed i men tary se quence only five Cladocera spe cies were pres ent. Cladocera com mu nity was dom i nated by lit to ral spe cies (4) and among them one (Ilyocryptus nevadensis) is en demic. The de tailed anal y sis of the sed i ments (ev ery 1 cm) al lowed us to track con tem - po rary cli ma tic and anthropogenic changes. Our re sults showed that Lago de la Luna is a very sen si tive eco sys tem and has strong re sponse to cli ma tic changes. The most re mark able change in the Cladocera com mu nity was ob served between 1683–1780 yr, which was well cor re lated with the Lit tle Ice Age. PCA re sults im plied that mod ern state of the lake Lago de la Luna is very sim i lar to one 400–500 yr ago. Only one pe riod was iden ti fied when hu man im pact was of im por tance. This pe riod seemed to cor re late with changes in the lake eco sys tem due to fish in tro duc tion in the 1950s.
    Źródło:
    Studia Quaternaria; 2012, 29; 23-29
    1641-5558
    2300-0384
    Pojawia się w:
    Studia Quaternaria
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Some comments on compositional analysis in management and production engineering
    Autorzy:
    Vives-Mestres, M.
    Martín-Fernández, J. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/406810.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    production composition
    log ratio analysis
    clr-biplot
    CoDa dendrogram
    ternary diagram
    simplex
    Opis:
    This paper introduces the most basic concepts of the compositional analysis of data with a simple but real example form the Management and Production Engineering (MPE) field. Compositional Data (CoDa) are vectors of positive elements that represent parts of a whole and are widely found in MPE, i.e. production times, resource composition, percentage utilization of work stands, waste components. . . The need for an analysis based on ratios of components (or better log-ratios of components) is illustrated step by step, and findings are compared to the corresponding standard methods applied to raw compositions. The paper also exposes the principles of CoDa analysis and presents two basic descriptive tools suitable for CoDa: the clr-biplot and the CoDa dendrogram. The example is a time series, from 1994 to 2013, of motor vehicle production in 8 countries and regions.
    Źródło:
    Management and Production Engineering Review; 2015, 6, 2; 63-72
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pathway analysis to determine factors contributing to overall quality scores in four berry crops
    Autorzy:
    Cockerton, H.
    Blanco Unzueta, M.
    Johnson, A.W.
    Vadillo Dieguez, A.
    Fernandez Fernandez, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/1077482.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Ogrodnictwa
    Tematy:
    berry plant
    blackberry
    blueberry
    raspberry
    strawberry
    fruit quality
    environmental factor
    agronomic factor
    genetic factor
    berry crop
    Opis:
    Fruit quality attributes are influenced by environmental, agronomic and genetic factors; both cultivars and growing conditions can vary substantially between UK production and imported fruit. This study aimed to record and dissect the most relevant fruit quality traits for berries imported into the UK in the winter months. Blackberry, blueberry, raspberry and strawberry fruit were imported from 11 countries into a Kent-based packhouse (UK) or purchased from major retailers between December 2018 and March 2019. Multiple fruit quality components were assessed for relative contribution towards a high “overall assessment” fruit quality score. It was found that strawberry and blackberry overall scores were affected by sweetness perception, whereas blueberry and raspberry organoleptics are more complex, with overall scores influenced by flavor perception. Multiple raspberry and strawberry fruit quality traits were found to be associated with genotypic differences, indicating a promising potential for genetic improvement through breeding. By contrast, the study findings suggest that there is less potential for genetic improvement in blueberry, and that the environment may have a large effect on blueberry fruit quality traits.
    Źródło:
    Journal of Horticultural Research; 2020, 28, 2; 35-42
    2300-5009
    Pojawia się w:
    Journal of Horticultural Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical Analysis and Simulations of Quasistatic Frictionless Contact Problems
    Autorzy:
    Fernandez Garcia, J. R.
    Han, W.
    Shillor, M.
    Sofonea, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/908327.pdf
    Data publikacji:
    2001
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    analiza numeryczna
    quasistatyka
    metoda elementów skończonych
    quasistatic contact
    Signorini condition
    normal compliance
    viscoplasticity
    variational inequalitie
    error estimate
    finite element method (FEM)
    numerical approximation
    Opis:
    A summary of recent results concerning the modelling as well as the variational and numerical analysis of frictionless contact problems for viscoplastic materials are presented. The contact is modelled with the Signorini or normal compliance conditions. Error estimates for the fully discrete numerical scheme are described, and numerical simulations based on these schemes are reported.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2001, 11, 1; 205-222
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Surface-Coated CdS Nanocrystals
    Autorzy:
    Fernandez, J.
    de Souza-Parise, M.
    Morais, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399521.pdf
    Data publikacji:
    2013-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.30.Fs
    78.40.Fy
    78.55.Et
    78.67.Bf
    78.70.Ck
    Opis:
    CdS nanocrystals were prepared using a standard colloidal route (co-precipitation chemical reaction) whereas modulation of the optical and structural properties was realized via surface coating the nanocrystals with ethylene glycol molecules using an in situ procedure. The as-produced nanocrystals were characterized by X-ray diffraction, Raman spectroscopy, UV-absorption measurements and photoluminescence. The nanocrystal quality was revealed by the spectroscopic data, though the final product presents a mixture of both zinc blende (cubic) and wurtzite (hexagonal) phases. The X-ray data indicated that the concentration of the ethylene glycol used during the synthesis process modulates the nanocrystal size and the crystal phase of the end material.
    Źródło:
    Acta Physica Polonica A; 2013, 124, 1; 108-111
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Bio-methanization of organic fraction from municipal solid waste: temperature effects
    Autorzy:
    Fernández-Rodríguez, J.
    Pérez, M.
    Romero, L. I.
    Powiązania:
    https://bibliotekanauki.pl/articles/779264.pdf
    Data publikacji:
    2013
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    anaerobic digestion
    OFMSW
    mesophilic
    thermophilic
    methane
    Opis:
    The main objective of this study was to analyse the development of dry anaerobic digestion process of OFMSW in batch reactors under two temperature ranges, thermophilic (55°C) and mesophilic (35°C). The experimental results lead to the conclusion that the thermophilic range has a greater rate of hydrolysis and is therefore more effective to degrade wastes, shortening the overall operating time. For example, the hydrolytic step in the thermophilic (T) process lasted an average of 8 days versus 14 days in the mesophilic (M) range. The methanogenic phase lasted for 18 and 29 days in the T and M processes, respectively. The mesophilic range showed higher removal of the organic effluent but with greater uptime requirements. Moreover, the thermophilic range showed greater productivities than the mesophilic range, and the productivities were approximately doubled in terms of the produced biogas from a given amount of consumed organic matter.
    Źródło:
    Polish Journal of Chemical Technology; 2013, 15, 2; 99-106
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Bundle sheath-specific expression of the ascorbate peroxidase 2 affects photosynthesis in whole plant
    Autorzy:
    Gorecka, M.
    Alvarez Fernandez, R.
    Bialasek, M.
    Mulleineaux, P.
    Karpinski, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/951327.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    conference
    sheath-specific expression
    ascorbate peroxidase
    hydrogen peroxide
    photosynthesis
    cytosolic peroxidase
    fluorescence
    electron transport chain
    gene encoding
    Źródło:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 2
    0860-7796
    Pojawia się w:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Detection of significant wavelengths for identifying and classifying Fusarium oxysporum during the incubation period and water stress in Solanum lycopersicum plants using reflectance spectroscopy
    Autorzy:
    Ortiz, J.C.M.
    Carvajal, L.M.H.
    Fernandez, V.B.
    Powiązania:
    https://bibliotekanauki.pl/articles/65540.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    Spectroscopy has become one of the most used non-invasive methods to detect plant diseases before symptoms are visible. In this study it was possible to characterize the spectral variation in leaves of Solanum lycopersicum L. infected with Fusarium oxysporum during the incubation period. It was also possible to identify the relevant specific wavelengths in the range of 380–1000 nm that can be used as spectral signatures for the detection and discrimination of vascular wilt in S. lycopersicum. It was observed that inoculated tomato plants increased their reflectance in the visible range (Vis) and decreased slowly in the near infrared range (NIR) measured during incubation, showing marked differences with plants subjected to water stress in the Vis/NIR. Additionally, three ranges were found in the spectrum related to infection by F. oxysporum (510–520 nm, 650–670 nm, 700–750 nm). Linear discriminant models on spectral reflectance data were able to differentiate between tomato varieties inoculated with F. oxysporum from healthy ones with accuracies higher than 70% 9 days after inoculation. The results showed the potential of reflectance spectroscopy to discriminate plants inoculated with F. oxysporum from healthy ones as well as those subjected to water stress in the incubation period of the disease.
    Źródło:
    Journal of Plant Protection Research; 2019, 59, 2
    1427-4345
    Pojawia się w:
    Journal of Plant Protection Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic and Heat Capacity Study of the new $Gd_{1-x}Ce_xNi_5$ Series
    Autorzy:
    Dzubinska, A.
    Reiffers, M.
    Espeso, J.
    Rodríguez Fernández, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1398287.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.27.+a
    75.30.-m
    75.30.Mb
    Opis:
    We have prepared a new system of $Gd_{1-x}Ce_xNi_5$ polycrystalline samples with concentrations x =0, 0.2, 0.5, and 0.8 in order to study the influence of different rare-earths substitutions on the ground state connected with spin fluctuations. GdNi₅ is a ferromagnetic compound with $T_{C}=31.8 K$ and CeNi₅ is a well-known spin fluctuation compound without magnetic ordering down to the lowest temperatures. X-ray diffraction study confirms the hexagonal crystal structure and the single phase samples. Magnetic properties (M(T),M(B)) show that an increasing content of Ce depresses the transition temperature, $T_{C}$, down to 4.9 K for x=0.8. The heat capacity measurements confirmed these results.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 997-999
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The role of mutagenesis in the modification of the fatty acid profile of oilseed crops
    Autorzy:
    Velasco, L
    Perez-Vich, B.
    Fernandez-Martinez, J.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2043643.pdf
    Data publikacji:
    1999
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    oil seed
    mutagenesis
    induced mutation
    fatty acid
    crop
    modification
    Źródło:
    Journal of Applied Genetics; 1999, 40, 3; 185-209
    1234-1983
    Pojawia się w:
    Journal of Applied Genetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparativa de contaminación acústica en espacios públicos caso Zócalo y plaza San José en la ciudad de Puebla
    Analiza porównawcza zanieczyszczenia hałasem miejsc publicznych – skweru Zócalo i placu San José - w Puebla
    Autorzy:
    Molar Orozko, M. E.
    Fernandez de Lara Aguilar, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/372010.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    public space
    noise
    green area
    square Zolaco
    przestrzeń publiczna
    hałas
    teren zielony
    skwer
    Opis:
    Una de las agresiones más graves que originan las ciudades es la contaminación acústica generado por la actividad humana. El ruido, aunque menos alarmante que la contaminación atmosférica, provoca molestias e incluso patologías cuando supera un nivel determinado. La principal fuente de ruido en las ciudades es el tráfico rodado, por encima del que generan la industria o las actividades en la vía pública. El objetivo del trabajo fue analizar dos espacios públicos en la ciudad de Puebla México, con similares características, respecto a su nivel de contaminación acústica de acuerdo a su contexto. El resultado permite señalar que existen puntos críticos en los espacios que se encuentran fuera del rango per-mitido, pero lo que es aun más preocupante que el usuario tiende a acos-tumbrarse al ruido.
    Jednym z najpoważniejszych zanieczyszczeń występujących w miastach jest hałas związany z działalnością człowieka. Głównym jego źródłem w miastach jest ruch drogowy i jego oddziaływanie na otoczenie. Celem artykułu było zbadanie dwóch przestrzeni publicznych skweru Zòcalo i placu San José w mieście Puebla w Meksyku. Są to przestrzenie charakteryzujące się podobnymi cechami w odniesieniu do poziomu hałasu generowanego na ich terenie. Konkluzję stanowi fakt, iż mimo przekroczeń dopuszczalnych poziomów dźwięku, osoby przebywające na tych terenach i narażone na nadmierny hałas przyzwyczajają się do niego.
    Źródło:
    Zeszyty Naukowe. Inżynieria Środowiska / Uniwersytet Zielonogórski; 2016, 162 (42); 60-76
    1895-7323
    Pojawia się w:
    Zeszyty Naukowe. Inżynieria Środowiska / Uniwersytet Zielonogórski
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of the new Monte Carlo code AlfaMC to the calibration of alpha-particle sources
    Autorzy:
    Jurado Vargas, M.
    Fernández Timón, A.
    García Orellana, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/148497.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    alpha-particle spectrometry
    code AlfaMC
    Monte Carlo simulation
    scattering and self-absorption
    Opis:
    Measurements of α-particle sources require corrections to the counting rate due to scattering and self- -absorption in the source and the backing material. In this study, we describe a simple procedure to estimate these corrections using the new Monte Carlo code AlfaMC to consider the effects of scattering and self-absorption conjointly, and so to determine the activity of α emitters. The procedure proposed was applied to 235UO2 sources deposited on highly polished platinum backings. In general, the dependence of the efficiency with source thickness was in good agreement with a simple model considering a linear and a hyperbolic behavior for thin and thick sources, respectively, although significant deviations from this model were found for very thin sources. For these very thin sources, the Monte Carlo simulation revealed to be as a required method in the primary calibration of α-particle sources. The efficiency results obtained by simulation with AlfaMC were in agreement with available efficiency data.
    Źródło:
    Nukleonika; 2015, 60, No. 3, part 2; 651-655
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new extrusion head with integrated ultrasonic device and online process parameters measurements system — design and testing
    Nowa głowica wytłaczarki z wbudowanym urządzeniem ultradźwiękowym i układem bezpośredniego pomiaru parametrów procesu — projekt i testowanie
    Autorzy:
    Muniesa, M.
    Fernández, Á.
    Clavería, I.
    Javierre, C.
    Sarasua, J. A.
    Blanco, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/947343.pdf
    Data publikacji:
    2015
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
    Tematy:
    extrusion
    head design
    ultrasounds
    viscosity
    parameters monitoring
    extrudate
    wytłaczanie
    konstrukcja głowicy
    ultradźwięki
    lepkość
    monitorowanie parametrów
    wytłoczyna
    Opis:
    A new extrusion die with integrated ultrasonic device and online viscosity monitoring system was designed. This new construction was tested in the process of high density polyethylene (PE-HD) extrusion. Ultrasonic vibration is applied at various flow rates of material flowing through the output die channel, making the process more efficient. Under ultrasounds application, extrudate flow rate is enhanced by up to 10 %. Die pressure is reduced by up to 16 % for all the rates studied, being this reduction higher as flow rate is lower. Viscosity values are reduced by between 5 and 8 %, depending on the flow rate applied. Temperature is slightly increased.
    Zaprojektowano nową głowicę wytłaczarki z wbudowanym urządzeniem ultradźwiękowym i systemem bezpośredniego pomiaru lepkości stopionego polimeru. Tę nową konstrukcję testowano prowadząc proces wytłaczania polietylenu dużej gęstości (PE-HD). Badano wpływ wibracji ultradźwiękowych na efektywność procesu wytłaczania przy różnych szybkościach przepływu stopu polimeru przez kanał dyszy wylotowej. Zastosowanie ultradźwięków powodowało zwiększenie przepływu stopu nawet o 10 %. W przypadku wszystkich badanych szybkości przepływu zaobserwowano zmniejszanie się ciśnienia w dyszy wylotowej, przy czym zmniejszenie to było tym większe (osiągając 16 %) im mniejszy był przepływ. Wibracje ultradźwiękowe powodowały także spadek lepkości od 5 do 8%, w zależności od zastosowanej szybkości przepływu. Energia ultradźwięków dostarczana do stopu tylko nieznacznie zwiększała jego temperaturę.
    Źródło:
    Polimery; 2015, 60, 3; 209-216
    0032-2725
    Pojawia się w:
    Polimery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Predicting water movement in a mediterranean soil-crop system with two simulation models
    Modelowanie ruchu wody w systemie gleba-roślina w warunkach klimatu śródziemnomorskiego
    Autorzy:
    Fernandez, J.
    Slawinski, C.
    Moreno, F.
    Walczak, R.
    Vanclooster, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402140.pdf
    Data publikacji:
    2001
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Źródło:
    Acta Agrophysica; 2001, 57; 27-38
    1234-4125
    Pojawia się w:
    Acta Agrophysica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    First record of chambered hexactinellid sponges from the Palaeozoic
    Autorzy:
    Nose, M.
    Vodrazka, R.
    Fernandez, L.-P.
    Mendez-Bedia, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/20593.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Opis:
    A new chambered hexactinellid sponge, Casearia devonica sp. nov., is described from the Lower Devonian of northern Spain (Cantabrian Mountains). The fossil represents the first evidence of chambered hexactinellid sponges from the Palaeozoic and the oldest representative of the order Hexactinosida. Casearia devonica sp. nov. occurred within small metre-sized mud mounds that developed in deeper water below the storm wave base.
    Źródło:
    Acta Palaeontologica Polonica; 2014, 59, 4
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Some facts concerning the epizootiology of trichinellosis in Spain
    Niektóre dane o epizootiologii włośnicy w Hiszpanii
    Nekotorye fakty o ehpizootologii trikhinelleza v Ispanii
    Autorzy:
    Cordero del Campillo, M.
    Martinez Fernandez, A.
    Aller Gancedo, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/2177505.pdf
    Data publikacji:
    1970
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Źródło:
    Wiadomości Parazytologiczne; 1970, 16, 1; 100-108
    0043-5163
    Pojawia się w:
    Wiadomości Parazytologiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessing herbicide leaching from field measurements and laboratory experiments
    Określenie wymywania herbicydów na podstawie pomiarów polowych i doświadczeń laboratoryjnych
    Autorzy:
    Cuevas, M.V.
    Calderon, M.J.
    Fernandez, J.E.
    Hermosin, M.C.
    Moreno, F.
    Cornejo, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402082.pdf
    Data publikacji:
    2001
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Źródło:
    Acta Agrophysica; 2001, 57; 15-25
    1234-4125
    Pojawia się w:
    Acta Agrophysica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Crustacean microcoprolites from the Upper Jurassic - Lower Cretaceous of the Meuquen Basin, Argentina: Systematics and biostratigraphic implications
    Autorzy:
    Kietzmann, D A
    Blau, J.
    Fernandez, D.E.
    Palma, R.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/21225.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Opis:
    As a result of a microfacial study in the outer and middle ramp deposits of the Vaca Muerta Formation (lower Tithonian–upper Valanginian), four ichnotaxa of crustacean microcoprolites are described: Palaxius azulensis Kietzmann isp. nov., Palaxius caracuraensis Kietzmann isp. nov., Helicerina? isp. A. aff. Helicerina siciliana and Helicerina isp. B. They represent one of the first records of crustacean microcoprolites for the Neuquén Basin and Argentina. Helicerina is reported for the first time from the Upper Jurassic and Lower Cretaceous of South America. It is inferred that Palaxius ichnospecies were produced by callianassids, while Helicerina ichnospecies could be produced by decapods of Mecochiridae, Erymidae, and/or Nephropidae affinity. Two assemblages of crustacean microcoprolites are recognised, a middle Tithonian to lower Berriasian Palaxius−dominated assemblage and an early to late Valanginian Helicerina−dominated assemblage.
    Źródło:
    Acta Palaeontologica Polonica; 2010, 55, 2; 277-284
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Exactness of formal asymptotic solutions of a Dirichlet problem modeling the steady state of functionally-graded microperiodic nonlinear rods
    Autorzy:
    Décio, Roberto M.S.
    Pérez-Fernández, Leslie D.
    Bravo-Castillero, Julián
    Powiązania:
    https://bibliotekanauki.pl/articles/122748.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    asymptotic homogenization
    power-law nonlinearity
    functionally-graded rods
    stan ustalony
    problem Dirichleta
    metoda homogenizacji
    rozwiązanie asymptotyczne
    Opis:
    In their usual form, homogenization methods produce first-order approximations of the exact solutions of problems for differential equations with rapidly oscillating coefficients which model the physical behavior of microstructured media. However, there is need of approximations containing higher-order terms when the usual first-order approximations, which are formed by superposing a macroscopic trend and a local perturbation, are not capable of reproducing the local details of the exact solutions. Here, two-scale asymptotic solutions with second-order terms are provided for a Dirichlet problem modeling the steady state of functionally-graded microperiodic nonlinear rods. The need of considering higherorder terms is illustrated through numerical examples for various power-law nonlinearities.
    Źródło:
    Journal of Applied Mathematics and Computational Mechanics; 2019, 18, 3; 45-56
    2299-9965
    Pojawia się w:
    Journal of Applied Mathematics and Computational Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Consumer affinity as a key factor to mitigate reluctance to buy foreign products: The moderating role of organic and induced image to counteract negative communication campaigns and image crises
    Autorzy:
    Serrano-Arcos, M. Mar
    Sanchez Fernández, Raquel
    Pérez-Mesa, Juan Carlos
    Powiązania:
    https://bibliotekanauki.pl/articles/39990489.pdf
    Data publikacji:
    2024
    Wydawca:
    Instytut Badań Gospodarczych
    Tematy:
    reluctance to buy
    consumer affinity
    perceived value and risk
    organic and induced image
    counteracting negative campaigns
    Opis:
    Research background: Anti-consumption practices, in particular consumers’ reluctance to buy (RTB) foreign products, are increasingly common in today’s globalised and interconnected markets. This phenomenon is accentuated by the impact of negative consumer dispositions (e.g., animosity or ethnocentrism), which contribute to an unfavourable perception of foreign products and, consequently, increase RTB. However, knowledge about possible factors that may mitigate this RTB foreign products is limited, and even less is known about the influence that positive dispositions (e.g., affinity) may have on consumer perceptions and consumption/non-consumption decisions. Moreover, consumers are inundated with information from various sources, which can significantly influence their perceptions and image of a product-country, especially in a context associated with negative communication campaigns and image crises. Purpose of the article: This research delves into the study of consumer affinity towards a foreign country, understood as an emotional feeling or positive disposition of a consumer that may mitigate their RTB foreign products, which often results from negative communication campaigns and a country-product image crisis. In addition, its influence on perceived risk and value, and the impact of these on RTB, is investigated. The moderating effect of the organic and induced image formed by the consumer on the risk-value relationship is also analysed, determining whether the induced image undermines this relationship. Methods: The empirical study focuses on the Spanish agri-food sector, which has been the subject of negative communication campaigns and image crises in foreign markets. The conceptual model was tested in a sample of German consumers, as Germany is the primary destination country for these products and has also been the origin of several image crises in this sector. PLS-SEM was used to validate the proposed hypotheses. Findings & value added: This research underlines the importance of fostering feelings of affinity towards a country and its products as a means to counteract negative campaigns, increase perceived value and mitigate RTB in foreign destination markets. Companies and public institutions, which influence the formation of the induced image in consumers, can contribute to improving consumers’ perception of a product-country. By shedding light on these dynamics, this study offers valuable insights for companies trying to cope with image crises fuelled by negative communication campaigns, which are increasingly prevalent in the competitive international landscape.
    Źródło:
    Oeconomia Copernicana; 2024, 15, 2; 717-763
    2083-1277
    Pojawia się w:
    Oeconomia Copernicana
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Turtle tracks from the Late Jurassic of Asturias, Spain
    Autorzy:
    Avanzini, M
    Garcia-Ramos, J.C.
    Lires, J.
    Menegon, M.
    Pinuela, L.
    Fernandez, L.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/20797.pdf
    Data publikacji:
    2005
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Opis:
    Although tracks of dinosaurs are well known from Upper Jurassic sediments, tracks of non−dinosaurian vertebrates are fairly rare. The Upper Jurassic Lastres Formations of Asturias in northern Spain contain many vertebrate tracksites that include footprints and trackways of non−dinosaurian tetrapods. Several of these tracks are natural casts of pentadactyl to tridactyl footprints with digits connected by arched structures. The digits are short with deep scratch marks oriented anteriorly. The Asturian tracks show a high degree of morphological similarity to other specimens previously described as possible turtle tracks. Observations from extant turtle trackways show some surprising similarities with the fossil material. The tracks are here interpreted as having been made by turtles partially buoyed by water or by turtles walking in a slightly wet subaerial environment.
    Źródło:
    Acta Palaeontologica Polonica; 2005, 50, 4; 743-755
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Permanent Magnetism in Thiol Capped Nanoparticles Gold and ZnO
    Autorzy:
    Crespo, P.
    García, M.
    Fernández-Pinel, E.
    de la Venta, J.
    Merino, J.
    Quesada, A.
    Hernando, A.
    Fernández, A.
    Penadés, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1813862.pdf
    Data publikacji:
    2008-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.75.+a
    73.22.-f
    75.30.Hx
    Opis:
    In spite of the diamagnetic behavior exhibited by bulk ZnO and Au, a ferromagnetic-like behavior is induced in nanoparticles of both systems by appropriate surface functionalization. By capping with thiol derivatized molecules, magnetic hysteresis is observed even at room temperature, whereas the magnetization has a very little temperature dependence. Capping induces an alteration of their electronic configuration that depends on the capping molecule, as evidenced by X-ray absorption spectroscopy, that strongly affects their magnetic properties.
    Źródło:
    Acta Physica Polonica A; 2008, 113, 1; 515-520
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Histopathological modifications induced ny mebendazole and niridazole on encysted larvae of Trichinella spiralis in CD-1 mice
    Modyfikacje zmian histopatologicznych w encystowanych larwach Trichinella spiralis wywołane podawaniem mebendazolu i niridazolu u myszy CD-1
    Modifikacii gistopatologicheskikh izmenenijj v ehcistirovannykh lichinkakh Trichinella spiralis, vyzvannoe podachejj mebendazola i niridazola u myshejj CD-1
    Autorzy:
    Martinez-Fernandez, A.R.
    Samartin-Duran, M.L.
    Toro Rojas, M.
    Ubeira, F.M.
    Rodriguez Cabeiro, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/2152739.pdf
    Data publikacji:
    1987
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Źródło:
    Wiadomości Parazytologiczne; 1987, 33, 4-5; 525-535
    0043-5163
    Pojawia się w:
    Wiadomości Parazytologiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nitric oxide trascriptional players during seed dormancy and germination
    Autorzy:
    Albertos, P.
    Mateos, I.
    Fernandez-Arbaizar, A.
    Romero-Puertas, M.
    Lorenzo, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/80484.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    conference
    nitric oxide
    seed dormancy
    germination
    phytohormone
    abscisic acid
    plant growth regulator
    transcription factor
    Źródło:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 2
    0860-7796
    Pojawia się w:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Calcium phosphate preservation of faecal bacterial negative moulds in hyaena coprolites
    Autorzy:
    Pesquero, M.D.
    Souza-Egipsy, V.
    Alcala, L.
    Ascaso, C.
    Fernandez-Jalvo, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/22871.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Opis:
    The vertebrate fossil locality of La Roma 2, Spain (Upper Miocene, Late Vallesian, MN10) is characterised by a high abundance of mammalian coprolites, which provide direct clues to the diets and habitats of the organisms that produced them. X-ray diffraction analysis showed a sample of hyaena (cf. Lycyaena chaeretis) coprolites to be mostly composed of calcium phosphate. Ultrastructural SEM and TEM studies revealed three successive phases of preservation, including an initial phase of mineralisation that produced microspherulites within a very fine-grained cement. This indicates that most of the calcium phosphate present in the coprolites precipitated rapidly, which in turn facilitated the formation of negative moulds of faecal bacteria within the coprolite matrix.
    Źródło:
    Acta Palaeontologica Polonica; 2014, 59, 4
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Generation of H2 on board LNG vessels for consumption in the propulsion system
    Autorzy:
    Fernández, Ignacio Arias
    Gómez, Manuel Romero
    Gómez, Javier Romero
    López-González, Luis M.
    Powiązania:
    https://bibliotekanauki.pl/articles/260010.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    boil-off gas
    efficiency
    H2 storage
    LNG vessel
    reforming
    Opis:
    At present, LNG vessels without reliquefaction plants consume the BOG (boil-off gas) in their engines and the excess is burned in the gas combustion unit without recovering any of its energy content. Excess BOG energy could be captured to produce H2, a fuel with high energy density and zero emissions, through the installation of a reforming plant. Such H2 production would, in turn, require on-board storage for its subsequent consumption in the propulsion plant when navigating in areas with stringent anti-pollution regulations, thus reducing CO2 and SOX emissions. This paper presents a review of the different H2 storage systems and the methods of burning it in propulsion engines, to demonstrate the energetic viability thereof on board LNG vessels. Following the analysis, it is identified that a pressurised and cooled H2 storage system is the best suited to an LNG vessel due to its simplicity and the fact that it does not pose a safety hazard. There are a number of methods for consuming the H2 generated in the DF engines that comprise the propulsion plant, but the use of a mixture of 70% CH4-30% H2 is the most suitable as it does not require any modifications to the injection system. Installation of an on-board reforming plant and H2 storage system generates sufficient H2 to allow for almost 3 days’ autonomy with a mixture of 70%CH4-30%H2. This reduces the engine consumption of CH4 by 11.38%, thus demonstrating that the system is not only energy-efficient, but lends greater versatility to the vessel.
    Źródło:
    Polish Maritime Research; 2020, 1; 83-95
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of air temperature on forecasting the start of Cupressaceae pollen type in Ponferrada [Leon, Spain]
    Autorzy:
    Fuertes-Rodriguez, C R
    Gonzales-Parrado, Z.
    Vega-Maray, A.M.
    Valencia-Barrera, R.M.
    Fernandez-Gonzales, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/50902.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    Ponferrada
    woody plant
    pollen
    aerobiology
    heat requirement
    Leon
    Cupressaceae
    forecast
    chilling requirement
    Spain
    dormancy
    Opis:
    In order to survive periods of adverse cold climatic conditions, plant requirements are satisfi ed by means of physiological adaptations to prevent cells from freezing. Thus, the growth of woody plants in temperate regions slows down and they enter into a physiological state called dormancy. In order to identify the chilling and heat requirements to overcome the dormancy period of Cupressaceae pollen type in the south of Europe, we have carried out our study with aerobiological data from a 10-year (1996- 2005) period in Ponferrada, León (Spain). For the chilling requirements the best result was with a threshold temperature of 7.1ºC and an average of 927 CH. Calculation of heat requirements was carried out with maximum temperature, with 490 growth degree days (GDD) needed, with a threshold temperature of 0ºC. We have used the 2002-2003, 2003- 2004 and 2004-2005 periods in order to determine the real validity of the model. We have not used these years in developing the models. The dates predicted differ in only a few days from those observed: in 2002-2003 there was a difference of 11 days, in 2003-2004 predicted and observed dates were the same, but in 2004-2005 the difference obtained was of 43 days.
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2007, 14, 2
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spectrally tunable light source based on light-emitting diodes for custom lighting solutions
    Autorzy:
    Burgos-Fernandez, F. J.
    Vilaseca, M.
    Perales, E.
    Herrera-Ramirez, J. A.
    Martinez-Verdu, F. M.
    Pujol, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/173803.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    solid state lighting
    light-emitting diodes
    CIE standard illuminants
    minimization algorithm
    customized lighting design
    radiometry
    Opis:
    This study describes a novel spectral LED-based tunable light source used for customized lighting solutions, especially for the reconstruction of CIE (Commission Internationale de l'Eclairage) standard illuminants. The light source comprises 31 spectral bands ranging from 400 to 700 nm, an integrating cube and a control board with a 16-bit resolution. A minimization algorithm to calculate the weighting values for each channel was applied to reproduce illuminants with precision. The differences in spectral fitting and colorimetric parameters showed that the reconstructed spectra were comparable to the standard, especially for the D65, D50, A and E illuminants. Accurate results were also obtained for illuminants with narrow peaks such as fluorescents (F2 and F11) and a high-pressure sodium lamp (HP1). In conclusion, the developed spectral LED-based light source and the minimization algorithm are able to reproduce any CIE standard illuminants with a high spectral and colorimetric accuracy able to advance available custom lighting systems useful in the industry and other fields such as museum lighting.
    Źródło:
    Optica Applicata; 2016, 46, 1; 117-129
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Template Assisted Deposition of Ferromagnetic Nanostructures: from Antidot Thin Films to Multisegmented Nanowires
    Autorzy:
    Prida, V.M.
    Salaheldeen, M.
    Pfitzer, G.
    Hidalgo, A.
    Vega, V.
    González, S.
    Teixeira, J.
    Fernández, A.
    Hernando, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1032144.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.30.Gw
    75.70.Kw
    75.75.-c
    75.70.-i
    75.70.Rf
    Opis:
    The growth of nanostructured materials by means of different deposition methods employing nanoporous anodic aluminum oxide membranes as patterned templates has been widely used during last years due to the outstanding features displayed by these nanoporous templates. Here we report on the synthesis, morphology and magnetic properties exhibited by novel magnetic 1D and 2D nanostructured materials having nanowire or antidot thin films geometry, respectively, together to that of geometrically diameter modulated ferromagnetic nanowires. Their magnetic properties will be analyzed and discussed based on the different anisotropic behavior derived from their morphological and microstructural features.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 822-827
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    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:
    Cryogenic treatment and PVD coatings to augment wear resistance of tool steels
    Zastosowanie obróbki kriogenicznej i powłok PVD do zwiększenia odporności na ścieranie stali narzędziowych
    Autorzy:
    Peña-Parás, L.
    Trejo Montemayor, L. A.
    Ramírez Cantú, S.
    Fernández Corona, R. D.
    Reyna Reyes, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/190739.pdf
    Data publikacji:
    2013
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    PVD coatings
    tool steels
    cryogenic treatment
    powłoki PVD
    stale narzędziowe
    obróbka kriogeniczna
    Opis:
    The influence of deep cryogenic treatment and PVD coatings on the wear resistance and toughness of D2, S7, H13 and M4 tool steels were studied. Three different PVD coatings were applied after heat treatment: AlCrN, TiAlN, TiCrN. In order to research the wear resistance, the ball-on-disk tribological test was used per ASTM G-99; material toughness was evaluated through the Charpy-V test. Wear scars were examined through optical microscopy to calculate the volume loss. It is found that cryogenic treatment improved wear resistance and toughness up to 63% and 12% respectively. The material with the best combination of wear resistance properties and toughness was S7 with cryogenic treatment and TiAlN coating.
    W pracy przedstawiono wyniki badań wpływu obróbki kriogenicznej i powłok PVD na odporność na ścieranie oraz udarność stali narzędziowych D2, S7, H13 i M4. Zastosowano trzy różne powłoki PVD: AlCrN, TiAlN, TiCrN, które wcześniej poddano obróbce cieplnej. W celu zbadania odporności na zużycie przeprowadzono badania z użyciem testera kula-tarcza zgodnie z wymogami normy ASTM G-99. Udarność została oceniona z wykorzystaniem młota Charpy’ego. Zużycie objętościowe zostało zmierzone za pomocą mikroskopu optycznego. Stwierdzono, że obróbka kriogeniczna polepszyła odporność na ścieranie o 63%, a udarność o 12%. W wyniku przeprowadzonych badań stwierdzono, że materiałem o najlepszych właściwościach na ścieranie i udarność jest stal narzędziowa S7 poddana obróbce kriogenicznej i pokryta powłoką TiAlN.
    Źródło:
    Tribologia; 2013, 3; 109-117
    0208-7774
    Pojawia się w:
    Tribologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Solar generation estimation in electric power systems for prospective frequency control studies
    Autorzy:
    Martínez-García, A. A.
    Torres-Breffe, O. E.
    Vilaragut-Llanes, M.
    Delgado-Fernandez, O.
    Szpytko, J.
    Salgado-Duarte, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/2172499.pdf
    Data publikacji:
    2022
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    green shipping
    solar power
    electric power systems
    energy storage systems
    photovoltaic power generation
    cuban electrical system
    energy sources
    photo voltage solar generation
    Opis:
    Increasing the presence of non-conventional clean energy sources in Electrical Power Systems (EPS) is a global strategic goal. Particularly, photovoltaic systems are attractive due to their versatility, low maintenance cost, easy installation, noiselessness, etc. However, the integration of photovoltaic systems into EPS increases the necessary regulation actions performed by system generators due to stochastic fluctuations of solar radiation, especially on cloudy days. Even using complex models that consider many variables, solar irradiation and its corresponding photovoltaic power generation are difficult variables to forecast with accuracy in cloudy day scenarios. To address this problem, Energy Storage Systems (BESS) have been proposed as a solution to mitigate the variability of photovoltaic generation, which reduce the need to use traditional spinning reserves and provide auxiliary grid services. The BESS selection required to mitigate photovoltaic generation is directly related to the worst-case daily variability of photovoltaic generation in the short term. This paper proposes a practical estimation of daily perspective photo voltage solar generation curve in Electrical Power Systems.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2022, 16, 2; 211--217
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Molecular aerobiology-Plantago allergen Pla l 1 in the atmosphere
    Autorzy:
    Gonzalez-Parrado, Z.
    Fernandez-Gonzalez, D.
    Camazon, B.
    Valencia-Barrera, R.M.
    Vega-Maray, A.M.
    Asturias, J.A.
    Monsalve, R.I.
    Mandrioli, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/50756.pdf
    Data publikacji:
    2014
    Wydawca:
    Instytut Medycyny Wsi
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2014, 21, 2
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Youngest agamid lizards from Western Europe (Sierra de Quibas, Spain, late Early Pleistocene)
    Autorzy:
    Blain, H.-A.
    Bailon, S.
    Agusti, J.
    Pinero-Garcia, P.
    Lozano-Fernandez, I.
    Sevilla, P.
    Lopez-Garcia, J.M.
    Sanchez, G.R.
    Mancheno, M.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/21138.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Opis:
    Here we report a new Early Pleistocene record of agamid lizards (Agamidae indet.) from the Spanish locality of Quibas (ca. 1.3–1.0 Ma), which represents the latest evidence of the family in Western Europe. Up to now, the family Agamidae was considered to have disappeared in this region at 1.8 Ma. This new record implies the survival of agamid lizards for a large part of the Early Pleistocene in the southernmost Iberian Peninsula, probably because of favourable climatic and environmental conditions. Consequently, the formerly detected Pliocene / Pleistocene boundary is no longer recognisable in the evolution of the herpetological assemblages in Western Europe.
    Źródło:
    Acta Palaeontologica Polonica; 2014, 59, 4
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Transcriptomic profiling of linolenic acid-responsive genes in ROS signalling from RNA-seq data in Arabidopsis
    Autorzy:
    Mata-Perez, C.
    Sanchez-Calvo, B.
    Begara-Morales, J.
    Padilla, M.
    Valderrama, R.
    Luque, F.
    Fernandez-Ocana, A.
    Corpas, F.
    Barroso, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/80890.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    conference
    linoleic acid
    polyunsaturated fatty acid
    jasmonic acid
    phytohormone
    reactive oxygen species
    hydrogen peroxide
    gene expression
    Arabidopsis thaliana
    lipoxygenase
    Źródło:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 2
    0860-7796
    Pojawia się w:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Software Startups – A Research Agenda
    Autorzy:
    Unterkalmsteiner, M.
    Abrahamsson, P.
    Wang, X. F.
    Nguyen-Duc, A.
    Shah, S.
    Bajwa, S. S.
    Baltes, G. H.
    Conboy, K.
    Cullina, E.
    Dennehy, D.
    Edison, H.
    Fernandez-Sanchez, C
    Garbajosa, J.
    Gorschek, T.
    Klotins, E.
    Hokkanen, L.
    Kon, F.
    Lunesu, I.
    Marchesi, M.
    Morgan, L.
    Oivo, M.
    Selig, C.
    Seppänen, P.
    Sweetman, R.
    Tyrväinen, P.
    Ungerer, C.
    Yagüe, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/953060.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    software startup
    research agenda
    software-intensive systems
    Opis:
    Software startup companies develop innovative, software-intensive products within limited time frames and with few resources, searching for sustainable and scalable business models. Software startups are quite distinct from traditional mature software companies, but also from micro-, small-, and medium-sized enterprises, introducing new challenges relevant for software engineering research. This paper’s research agenda focuses on software engineering in startups, identifying, in particular, 70+ research questions in the areas of supporting startup engineering activities, startup evolution models and patterns, ecosystems and innovation hubs, human aspects in software startups, applying startup concepts in non-startup environments, and methodologies and theories for startup research. We connect and motivate this research agenda with past studies in software startup research, while pointing out possible future directions. While all authors of this research agenda have their main background in Software Engineering or Computer Science, their interestin software startups broadens the perspective to the challenges, but also to the opportunities that emerge from multi-disciplinary research. Our audience is therefore primarily software engineering researchers, even though we aim at stimulating collaborations and research that crosses disciplinary boundaries. We believe that with this research agenda we cover a wide spectrum of the software startup industry current needs.
    Źródło:
    e-Informatica Software Engineering Journal; 2016, 10, 1; 89-123
    1897-7979
    Pojawia się w:
    e-Informatica Software Engineering Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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