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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
Wyświetlanie 1-25 z 56

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