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Wyszukujesz frazę "Hernandez, P." wg kryterium: Wszystkie pola

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    Wyświetlanie 1-9 z 9
    Tytuł:
    Uncovering production flows from small farms: results from Poland and Portugal case studies
    Przepływy produkcyjne drobnych gospodarstw rolnych na przykładzie regionów badawczych z Polski i Portugalii
    Autorzy:
    Czekaj, M.
    Hernandez, P.
    Fonseca, A.
    Rivera, M.
    Żmija, K.
    Żmija, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1790571.pdf
    Data publikacji:
    2019
    Wydawca:
    The Polish Association of Agricultural and Agribusiness Economists
    Tematy:
    small farms
    production flows
    Portugal
    Polska
    drobne gospodarstwa rolne
    przepływy produkcyjne
    Portugalia
    Polska
    Opis:
    This study is an attempt to assess the impact of small farms (SF) on the regional food product circulation of specific key products in selected, fragmented, agrarian regions in Poland and Portugal. The empirical study is based on the analysis of food product maps which were developed based on data from a survey conducted among owners of small farms and small food businesses at focus group meetings and workshops organized in 2017 and 2018 in the Nowotarski and Nowosądecki subregions in Poland and in the Alentejo Central and Oeste subregions in Portugal. Qualitative data analysis was conducted using uniform methodology. In each of the subregions, focus groups helped to confront the assumptions resulting from surveys and corroborate the flows and fluxes described in the developed food product maps. Data collected during focus groups were enriched by data gathered during regional workshops that focused on food system governance. It was concluded that food product maps indicate interesting relationship flows of small farmers’ products along the food system, highlighting the role of fluxes connecting small farmers with other actors regarding specific key products. Several similarities and disparities between regional KP production flows in the Portuguese and Polish subregions, based on the type of key product, the various distribution channels and farming capacities present in each subregion were observed.
    Źródło:
    Annals of The Polish Association of Agricultural and Agribusiness Economists; 2019, 21, 3; 49-61
    2657-781X
    2657-7828
    Pojawia się w:
    Annals of The Polish Association of Agricultural and Agribusiness Economists
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Boundaries, Martins Axiom, and (P)-properties in dual Banach spaces
    Autorzy:
    Granero, Antonio S.
    Hernández, Juan M.
    Powiązania:
    https://bibliotekanauki.pl/articles/745016.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Matematyczne
    Tematy:
    Boundaries, Martin's Axiom, equality \(Seq(X^{**})=X^{**}\), super-(P) property
    Opis:
    Let \(X\) be a~Banach space and \(\mathcal{S} \mathit{eq}(X^{**})\) (resp., \(X_{\aleph_0}\)) the subset of elements \(\psi\in X^{**}\) such that there exists a~sequence \((x_n)_{n\geq 1}\subset X\) such that \(x_n\to \psi\) in the \(w^*\)-topology of \(X^{**}\) (resp., there exists a~separable subspace \(Y\subset X\) such that \(\psi\in \smash{{\overline{Y}^{w^*}}}\)). Then: (i) if \(\operatorname{Dens}(X)\geq \aleph _1\), the property \(X^{**}=X_{\aleph _0}\) (resp., \(X^{**}=\mathcal{S}\mathit{eq}(X^{**})\)) is \(\aleph _1\)-determined, i.e., \(X\)~has this property iff \(Y\) has, for every subspace \(Y\subset X\) with \(\operatorname{Dens}(Y)=\aleph _1\); (ii) if \(X^{**}=X _{\aleph _0}\), \( (B(X^{**}),w^*)\) has countable tightness; (iii) under the Martin's axiom \(\mathit{MA} (\omega _1)\) we have \(X^{**}=\mathcal{S}\mathit{eq}(X^{**})\) iff \((B(X^*),w^*)\) has countable tightness and \(\\overline {\text {co}}(B)=\overline {\text {co}} ^{w^*}(K)\) for every subspace \(Y\subset X\), every \(w^*\)-compact subset \(K\) of \(Y^*\), and every boundary \(B\subset K\).
    Źródło:
    Commentationes Mathematicae; 2016, 56, 1
    0373-8299
    Pojawia się w:
    Commentationes Mathematicae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    First tyrannosaurid remains from the Upper Cretaceous “El Gallo” Formation of Baja California, Mexico
    Autorzy:
    Peecook, B.R.
    Wilson, J.A.
    Hernandez-Rivera, R.
    Montellano-Ballesteros, M.
    Wilson, G.P.
    Powiązania:
    https://bibliotekanauki.pl/articles/21150.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Opis:
    We report a complete left fourth metatarsal collected from rocks of the Upper Cretaceous (Campanian) “El Gallo” Formation exposed along the Pacific Ocean near El Rosario, Baja California, México. The metatarsal IV was part of an arctometatarsalian metatarsus, as evidenced by a deep medial notch proximally and extensive articulation for metatarsal III. This condition, along with the U-shape of the proximal end, supports identification as tyrannosauroid. It is assigned to Tyrannosauridae based on features on the posterior surface of the shaft, but finer taxonomic resolution is not possible. Compared to other tyrannosauroids, the metatarsal is relatively short, closely resembling the proportions of the gracile Albertosaurus sarcophagus rather than the much more massive, robust metatarsals of Tyrannosaurus rex. The Baja tyrannosaurid metatarsal is shorter than almost all other tyrannosauroid fourth metatarsals, raising the possibility that it pertains to an immature individual. North American tyrannosauroids are best known from the northern coast of the Western Interior Seaway, as well as less frequently on the southern coast of the seaway in Utah and New Mexico. The new record in Baja marks the first unambiguous skeletal material of a tyrannosaurid both in México and along the Pacific coast.
    Źródło:
    Acta Palaeontologica Polonica; 2014, 59, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optical properties of maize seeds
    Autorzy:
    Hernandez, A.
    Cruz, O.
    Ivanov, R.
    Dominguez, P.
    Carballo, C.
    Moreno, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/25661.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    maize
    optical absorption coefficient
    photoacoustic spectroscopy
    absorption coefficient
    seed
    optical property
    raw material
    Źródło:
    International Agrophysics; 2011, 25, 3
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Unification proposal on market access for freight forwarding in the European Union
    Autorzy:
    Poliak, M.
    Šimurková, P.
    Jaśkiewicz, M.
    Hernandez, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/27315880.pdf
    Data publikacji:
    2018
    Wydawca:
    STE GROUP
    Tematy:
    business
    contract
    freight forwarding
    market
    responsibility
    biznes
    umowa
    spedycja
    rynek
    odpowiedzialność
    Opis:
    The paper deals with the issue of different market access for the transport procurement in the EU in context of open market of providing forwarding services. It highlights different requirements of market access in freight forwarding. The article proposes conditions of market access unification in freight forwarding based on analysis of the existing situation. It also refers to the different responsibility of freight forwarder depending on membership in the national associations of freight forwarders. The contribution analyses the limitation of liability in freight forwarding and shows differences in contract of freight forwarding for particular shipments by model examples. There is also pointed to the need for the development of uniform freight forwarding conditions in the EU.
    Źródło:
    New Trends in Production Engineering; 2018, 1, 1; 197-203
    2545-2843
    Pojawia się w:
    New Trends in Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Burgess Shale-type microfossils from the middle Cambrian Kaili Formation, Guizhou Province, China
    Autorzy:
    Harvey, T.H.P.
    Ortega-Hernandez, J.
    Lin, J.-P.
    Yuanlong, Z.
    Butterfield, N.J.
    Powiązania:
    https://bibliotekanauki.pl/articles/23425.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    paleontology
    microfossil
    Middle Cambrian
    Cambrian
    Kaili Formation
    Guizhou province
    China
    Priapulida
    acritarch
    palynology
    taphonomy
    Opis:
    Diverse carbonaceous microfossils, including exceptionally preserved remains of non−biomineralizing metazoans, are reported from a basal middle Cambrian interval of the Kaili Formation (Guizhou Province, China). The application of a gentle acid maceration technique complements previous palynological studies by revealing a larger size−class of acritarchs, a richer assemblage of filamentous microfossils, and a variety of previously unrecovered forms. Metazoan fossils include Wiwaxia sclerites and elements derived from biomineralizing taxa, including chancelloriids, brachiopods and hyolithids, in common with previously studied assemblages from the early and middle Cambrian of Canada. In addition, the Kaili Formation has yielded pterobranch remains and an assemblage of cuticle fragments representing “soft−bodied” worms, including a priapulid−like scalidophoran. Our results demonstrate the wide distribution and palaeobiological importance of microscopic “Burgess Shale−type” fossils, and provide insights into the limitations and potential of this largely untapped preservational mode.
    Źródło:
    Acta Palaeontologica Polonica; 2012, 57, 2
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of mechanical properties for wood pellets used in DEM simulations
    Autorzy:
    Gallego, E.
    Fuentes, J.M.
    Ruiz, A.
    Hernandez-Rodrigo, G.
    Aguado, P.
    Ayuga, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082921.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    biomass
    wood pellets
    mechanical properties
    discrete element method
    Opis:
    Wood pellets are increasingly being used to produce energy as a part of the decarbonization process of the economy, but their handling is associated with several problems, which usually requires that the equipment used has to be modified and improved. The discrete element method is a numerical technique suitable for simulating individual particles and handling systems. This paper focuses on the determination of the mechanical and physical parameters for wood pellet particles which are required to develop a discrete element method model to improve handling and transport systems. This study reports the experimentally determined values for wood pellet particles with respect to particle density, modulus of elasticity, particle – particle and particle – wall coefficients of restitution, and particle – particle and particle – wall coefficients of friction. Following the previous findings by other researchers with large samples of bulk material, it has been found that the modulus of elasticity for individual wood pellets depends on the water content, and the particle – wall coefficient of restitution depends on the impact velocity.
    Źródło:
    International Agrophysics; 2020, 34, 4; 485-494
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic Properties of GaMnAs Single Layers and GaInMnAs Superlattices Investigated at Low Temperature and High Magnetic Field
    Autorzy:
    Hernandez, C.
    Terki, F.
    Charar, S.
    Sadowski, J.
    Maude, D.
    Stanciu, V.
    Svedlindh, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2036030.pdf
    Data publikacji:
    2003-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Pp
    75.70.-i
    Opis:
    Magnetotransport properties of GaMnAs single layers and InGaMnAs/InGaAs superlattice structures were investigated at temperatures from 4 K to 300 K and magnetic fields up to 23 T to study the influence of carriers confinement through different structures. Both single layers and superlattice structures show paramagnetic-to-ferromagnetic phase transition. In GaMnAs/InGaAs superlattice beside the Curie temperature (T$\text{}_{c}$≈40 K), a new phase transition is observed close to 13 K.
    Źródło:
    Acta Physica Polonica A; 2003, 103, 6; 613-619
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An exact approach for radius of curvature measurement in a calibration test sphere
    Autorzy:
    Jalife-Chavira, Jaime M.
    Trujillo-Schiaffino, Gerardo
    Mendoza-Villegas, Paloma G.
    Salas-Peimbert, Didia P.
    Anguiano-Morales, Marcelino
    Corral-Martínez, Luis F.
    Zendejas-Hernández, Edgar
    Powiązania:
    https://bibliotekanauki.pl/articles/2086760.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    keratometry
    radius of curvature
    diopter
    cosine fringe pattern
    film
    Opis:
    In this paper we present a technique to measure the radius of curvature of a test sphere based on the relation between acquired images of a circular cosine fringe pattern and size of virtual image formed on the calibration test surface. Radius of curvature is calculated with the exact equation proposed, using the parameters of the optical setup. Fringe pattern evaluation was performed by locating extrema indices. The mathematical formulation as well as the experimental setup and results are presented. After applying a linear fit algorithm to the data as a method of compensation, obtained results show an error within the tolerance established by the ISO 10343 specifications.
    Źródło:
    Optica Applicata; 2022, 52, 2; 229--242
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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