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    Wyświetlanie 1-79 z 79
    Tytuł:
    A new method for a preliminary definition of a high–performance rudder for tuna purse seiners
    Autorzy:
    Martínez–López, A.
    Munín–Doce, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/259135.pdf
    Data publikacji:
    2012
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    rudder optimisation
    vessel manoeuvrability
    tuna vessel design
    Opis:
    The aim of this paper is to provide a simple method for the definition of a rudder for tuna purse seiners. The model achieved by the application of this method ensures the manoeuvrability of initial turning, course keeping and yaw checking. For this, the results obtained by other authors, through rudder tests and manoeuvrability tests of fishing vessels have been integrated with the recommendations of the International Normative. Finally, in the paper the method is applied to the case of a tuna vessel, providing a rudder model which could be optimised with CFD (Computer Fluid Dynamics) in further tests. The method proposed can be applied to other vessels whose main dimensions are met.
    Źródło:
    Polish Maritime Research; 2012, 3; 26-35
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Projekt jako kryterium demarkacji
    Design as a Criterion of Demarcation
    Autorzy:
    López, Mario A.
    Powiązania:
    https://bibliotekanauki.pl/articles/553253.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Zielonogórski. Instytut Filozofii
    Tematy:
    projekt eutaksjologiczny
    teleologia
    teleonomia
    falsyfikowalność
    epistemiczne uzasadnianie
    przekonanie podstawowe
    ontologiczne zaangażowanie
    naturalizm ontologiczny
    naturalizm metodologiczny
    eutaxiological design
    teleology
    teleonomy
    falsifiability
    epistemic justification
    basic belief
    ontological commitment
    ontological naturalism
    methodological naturalism
    Opis:
    Naturalizm metodologiczny, chociaż w sposób niejawny za sprawą wykluczenia odwołań do celowości, funkcjonuje całkowicie w zgodzie z założeniami naturalizmu ontologicznego i dlatego operuje jedynie w sferze tego, co empiryczne i naturalistyczne. Bardziej neutralna epistemologia w mniejszym stopniu opiera się na założeniach, pozwalając nauce na rozkwit bez ograniczeń narzucanych przez takie filozoficzne zobowiązanie. Zadanie oddzielenia nauki od naturalizmu metodologicznego wymaga porzucenia idei, że struktura wiedzy, czy też uzasadnione przekonanie, nie potrzebuje żadnego epistemicznego fundamentu i że uzasadnianie inferencyjne ma w nauce zdecydowanie wyższy status poznawczy niż uzasadnianie nieinferencyjne. W moim przekonaniu odwieczny problem nauki, a tym samym kryterium demarkacji, wiąże się z dwoma kwestiami. Po pierwsze, zakłada się, że tylko wiedza zdobywana inferencyjnie jest prawdziwie uzasadniona i, po drugie, że teorie muszą być — co najmniej — teoretycznie falsyfikowalne. W tym artykule zamierzam zaproponować kryterium demarkacji nauki pełniące praktyczną i heurystyczną rolę jako bodziec rozwoju nauki. Moja propozycja nie zakłada odgórnie mocy przyczynowej przypadku i konieczności, lecz zmusza naukowca do uznania ontologicznych cech przyrody i przyjęcia, że kwestia przyczynowości jest całkowicie otwarta. W ten sposób propozycja ta unika problemów, jakie na naukę nieubłaganie sprowadza naturalizm ontologiczny, a także jego wierny sprzymierzeniec — naturalizm metodologiczny.
    Methodological naturalism, though inexplicit in the denial of purpose, operates exclusively under the tenets of ontological naturalism and, therefore, proceeds only by way of the empirical and naturalistic. A more neutral epistemology is less presumptive and would allow science to flourish without the strictures of such a philosophical commitment. The task of divorcing science from methodological naturalism requires the abandonment of the idea that the structure of knowledge, or justified belief, requires no epistemic foundation and that inferential justification possess a uniquely superior epistemic status in the sciences than that which is non-inferentially known. As I see it, the persistent problem of science, and thus the criterion of demarcation that undergirds it, is two-fold. First, it is assumed that only inferential knowledge is genuinely justified, and second, that theories must be, at the very least, theoretically falsifiable. In this paper, I intend to provide a criterion of demarcating science that is practical and heuristically useful to spur scientific progress. My proposition does not presuppose the causal powers of chance and necessity. Instead, it forces the scientist to appreciate the ontological characteristics of nature and to leave the question of causation completely open, thereby, avoiding the pitfalls that ontological naturalism, and its faithful ally, methodological naturalism, habitually impose on science.
    Źródło:
    Filozoficzne Aspekty Genezy; 2016, 13; 75-100
    2299-0356
    Pojawia się w:
    Filozoficzne Aspekty Genezy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pyrite depression by dextrin in flotation with xanthates. Adsorption and floatability studies
    Autorzy:
    López-Valdivieso, A.
    Sanchez-Lopez, A. A.
    Padilla-Ortega, E.
    Robledo-Cabrera, A.
    Galvez, E.
    Cisternas, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/110263.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    flotation
    adsorption
    polysaccharides
    dextrin
    xanthates
    Opis:
    Depression of pyrite by dextrin in flotation with xanthates has been studied. The adsorption of dextrin and xanthates at the pyrite/aqueous solution interface has been investigated through electrokinetics, Raman spectroscopy and batch adsorption studies using oxidized pyrite. Microflotation studies were undertaken to evaluate the pyrite depression with dextrin using ethyl and propyl xanthates as the collector. The surface density of ferric hydroxide on pyrite depended on pH and was highest about the iep (pH 7.5) of the oxidized pyrite. Dextrin adsorption was directly related to the surface density of ferric hydroxide and took place through two steps suggesting two adsorption mechanisms on ferric hydroxide. Xanthate adsorption as dixanthogen occurred along with ferric hydroxide dissolution causing partial dextrin desorption from the pyrite surface; consequently, co-adsorption of xanthate and dextrin occurred on the surface. Depression of pyrite flotation with xanthate was determined by the oxidation level of the pyrite surface. Floatability of pyrite with xanthate was highly impaired by dextrin at pH 8 only when the surface density of ferric hydroxide on the pyrite surface was very high.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2018, 54, 4; 1159-1171
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Radiocatalytic degradation of dissolved organic compounds in wastewater
    Autorzy:
    Jiménez-Becerril, J.
    Moreno-López, A.
    Jiménez-Reyes, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/148022.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    wastewater
    dissolved organic carbon
    radiocatalysis
    Opis:
    Wastewater containing a high concentration of organic substances was exposed to gamma radiolysis in the presence and absence of a catalyst (TiO2); radiolysis and radiocatalysis were performed by means of continuous and discontinuous irradiation. Dissolved organic carbon (DOC) was the parameter used to estimate the concentration of organic compounds without interference by the high mineral content. The data was well fitted to the pseudo-first-order kinetic model of Langmuir-Hinshelwood. From a [DOC]0 = 140 ± 7 mg/L, the higher DOC degradation (74%) and apparent rate constant (Kapp = 0.083 h−1) were found using discontinuous radiocatalysis. This process could be an alternative method of treatment of industrial or municipal wastewater.
    Źródło:
    Nukleonika; 2016, 61, 4; 473-476
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnesium biodegradable implants coated with polylactic acid
    Autorzy:
    Munoz, M.
    Rams, J.
    Lopez, A.
    Matykina, E.
    Torres, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/284077.pdf
    Data publikacji:
    2017
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
    Tematy:
    implants
    biodegradation
    magnesium alloys
    Źródło:
    Engineering of Biomaterials; 2017, 20, no. 143 spec. iss.; 28
    1429-7248
    Pojawia się w:
    Engineering of Biomaterials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Performance analysis of a Medium Frequency offshore Grid for identification of vessels sailing on high density maritime European routes
    Autorzy:
    López, A.
    Gutiérrez, M.
    Ortega, A.
    Puente, C.
    Morales, A.
    Gonzalez, D.
    Díaz, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/259142.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ships identification systems
    Grid Method
    traffic control centre
    SITOR
    Opis:
    The paper analyses the performance of an Automatic Vessel Identification System on Medium Frequency (AVISOMEF), which works with the Grid Method (GM) on high density maritime European routes using real data and uniformly distributed data. Compared to other systems, AVISOMEF is a novelty, as it is not a satellite system, nor is it limited by a given coverage distance, in contrast to the Automatic Identification System (AIS), though in exceptional circumstances it leans towards it. To perform the analysis, special simulation software was developed. Moreover, a number of maritime routes along with their traffic density data were selected for the study. For each route, two simulations were performed, the first of which based on the uniform traffic distribution along the route, while the second one made use of real AIS data positioning of vessels sailing on the selected routes. The obtained results for both simulations made the basis for formulating conclusions regarding the capacity of selected routes to support AVISOMEF.
    Źródło:
    Polish Maritime Research; 2017, 4; 18-26
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improving of mixing effi ciency in a stirred reactor for lead recycling using computer simulation
    Zwiększenie wydajności łączenia w reaktorze mieszalnikowym dla odzysku ołowiu przy użyciu symulacji komputerowej
    Autorzy:
    Vite-Martinez, P.
    Ramirez-Lopez, A.
    Romero-Serrano, A.
    Chavez-Alcala, F.
    Lopez-Ramirez, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/317869.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Przeróbki Kopalin
    Tematy:
    mieszanie ołowiu
    ocena wydajności mieszania
    stężenie pierwiastka
    obliczeniowa mechanika płynów (CFD)
    lead stirring
    mixing efficiency evaluation
    tracer concentration
    computational fluid dynamics (CFD)
    Opis:
    Recycling is helping to reduce environmental risks and damages. Liquid lead is recovered from batteries in stirred batch reactors. Nevertheless it is necessary to establish parameters to evaluate mixing performance in order to make more efficient the industrial practices. Then this work is dedicated to simulate fluid hydro-dynamics in a lead stirred reactor by monitoring the distribution of an injected tracer to find the best injection point. Different injected points have been evaluated monitoring the tracer concentration on a group of points inside the batch to verify mixing. The tracer is assumed as ideal (with the same physical properties than lead). The reactor is a batch with two geometrical sections one cylindrical body and a semispherical on the bottom. The impeller used to promote lead stirring is a shaft with four flat blades. The tracer concentration on the monitoring points is averaged to evaluate the efficiency all around the reactor. Finally invariability of tracer concentration on the monitoring points is adopted as the criterion to evaluate mixing.
    Recykling pomaga zredukować ryzyko i szkody związane ze środowiskiem. Ciekły ołów z baterii odnawiany jest w reaktorze mieszalnikowym okresowym. Niemniej jednak, ważne jest by tak ustawić parametry, żeby ocenić skuteczność mieszania, a co za tym idzie, zwiększyć wydajność w praktykach przemysłowych. Następnie w artykule znajdujemy najlepsze miejsce do iniekcji przy użyciu symulacji dynamiki wodnej w płynie w reaktorze mieszalnikowym ołowiu, dzięki obserwacji ruchów wprowadzonego pierwiastka znaczonego. Różne punkty iniekcji zostały sprawdzone i monitorują pierwiastek znaczony w grupie punktów znajdujących się w reaktorze by zweryfikować mieszanie. Z założenia pierwiastek jest idealny (z tymi samymi właściwościami fizycznymi co ołów). Reaktor jest wsadowy z dwoma geometrycznymi sekcjami – jedną z cylindryczną obudową i drugą o półsferycznym dnie. Wirnik napędza mieszanie ołowiu w wale posiadającym cztery płaskie ostrza. Punkty monitorujące mają uśrednione stężenie pierwiastka w taki sposób, aby ocenić wydajność w całym reaktorze. Wreszcie, jednym z kryteriów wprowadzonych dla odpowiedniej oceny wydajności jest również niezmienność stężenia pierwiastka monitorującego.
    Źródło:
    Inżynieria Mineralna; 2015, R. 16, nr 1, 1; 25-32
    1640-4920
    Pojawia się w:
    Inżynieria Mineralna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Kinetics of hydrophobic agglomeration of molybdenite fines in aqueous suspensions
    Autorzy:
    Yang, B.
    Song, S.
    Lopez-Valdivieso, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/110890.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    agglomeration rate
    molybdenite fines
    hydrophobic agglomeration
    Opis:
    The kinetics of hydrophobic agglomeration of molybdenite fines in aqueous suspensions has been studied in this work. This study was performed on minus 5 μm molybdenite particles through turbid-ity measurements and imaging. The results have showed that stirring strength and kerosene addition greatly affected the agglomeration rate of molybdenite fines in aqueous suspensions. The higher was the stirring strength, the larger the agglomeration rate was. Kerosene addition enhanced not only the agglom-eration rate, but also the agglomerates structure. It was recommended to use radial impeller for the for-mation of hydrophobic agglomeration, because it produced a stronger shear field in impeller zone.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2015, 51, 1; 181-189
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new Middle Devonian heterocoral from Spain
    Autorzy:
    Fernandez-Martinez, E
    Tourneur, F.
    Lopez-Alcantara, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/21951.pdf
    Data publikacji:
    2003
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Cantabrian Zone
    Heterocorallia
    Eifelian
    Devonian
    heterocoral
    Middle Devonian
    paleontology
    Spain
    Opis:
    Most of the heterocorals described up to now from strata older than Famennian are of doubtful affinities. Numerous specimens of the new genus and new species here described were collected during a sedimentological study of the Santa Lucía Formation in La Pola de Gordon (León province, Cantabrian Mountains, NW Spain). Stellaphyllia luciensis gen. et sp. nov. is characterized by cylindrical coralla, with a diameter of less than 2 mm and more than 2 cm long, having stellate to more or less rounded outer profile. Four to six septa, less frequently seven, are cojoined axially by a short oblique septum. The few tabulae present are steeply arched. The microstructure of the septa and interseptal elements shows thin elongate microlamellae parallel to a median plate which is granular in appearance. The new genus dated to the lower Eifelian age could be important in understanding the early phylogeny and origin of the order Heterocorallia.
    Źródło:
    Acta Palaeontologica Polonica; 2003, 48, 4
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Re-evaluation of pachycormid fishes from the Late Jurassic of Southwestern Germany
    Autorzy:
    Maxwell, E.E.
    Lambers, P.H.
    Lopez-Arabello, A.
    Schweigert, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082225.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Actinopterygii
    Pachycormidae
    Lagerstätte
    Mesozoic
    Kimmeridgian
    Bavaria
    Nusplingen
    Opis:
    Pachycormidae is an extinct group of Mesozoic fishes that exhibits extensive body size and shape disparity. The Late Jurassic record of the group is dominated by fossils from the lithographic limestone of Bavaria, Germany that, although complete and articulated, are not well characterized anatomically. In addition, stratigraphic and geographical provenance are often only approximately known, making these taxa difficult to place in a global biogeographical context. In contrast, the late Kimmeridgian Nusplingen Plattenkalk of Baden-Württemberg is a well-constrained locality yielding hundreds of exceptionally preserved and prepared vertebrate fossils. Pachycormid fishes are rare, but these finds have the potential to broaden our understanding of anatomical variation within this group, as well as provide new information regarding the trophic complexity of the Nusplingen lagoonal ecosystem. Here, we review the fossil record of Pachycormidae from Nusplingen, including one fragmentary and two relatively complete skulls, a largely complete fish, and a fragment of a caudal fin. These finds can be referred to three taxa: Orthocormus sp., Hypsocormus posterodorsalis sp. nov., and Simocormus macrolepidotus gen. et sp. nov. The latter taxon was erected to replace “Hypsocormus” macrodon, here considered to be a nomen dubium. Hypsocormus posterodorsalis is known only from Nusplingen, and is characterized by teeth lacking apicobasal ridging at the bases, a dorsal fin positioned opposite the anterior edge of the anal fin, and a hypural plate consisting of a fused parhypural and hypurals. The holotype specimen contributes additional palaeobiological information, with small teleosteans preserved as gastric contents and ribs showing signs of callus formation. These new findings extend our knowledge of the anatomy and diversity of Pachycormidae, and represent an important first step in understanding factors controlling their distribution and morphological variation in the Late Jurassic of Europe.
    Źródło:
    Acta Palaeontologica Polonica; 2020, 65, 3; 429-453
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Physical and chemical characterization of masa and tortillas from parental lines, crosses, and one hybrid
    Autorzy:
    Valderrama-Bravo, C.
    Dominguez-Pacheco, A.
    Hernandez-Aguilar, C.
    Zepeda-Bautista, R.
    del Real-Lopez, A.
    Pahua-Ramos, M.E.
    Arellano-Vazquez, J.L.
    Moreno-Martinez, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/24739.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Opis:
    In maize plant breeding aimed at producing a hybrid, it is necessary to characterize the parents and hybrids by their agronomic aspects and grain quality so that the processing industry may offer consumers a quality product and also improve its efficiency. This study evaluated the viscoelastic parameters of masa and the chemical and texture properties of tortillas obtained from parent lines (M-54, M55, and CML-242), two single crosses (M54xM55 and M55xM54), and one hybrid (H-70). The morpho- logy of the maize grains and tortillas was analyzed using scanning electron microscopy. The firmness of masa obtained from CML-242 and H-70 maize was higher than that from the other maize genotypes. M-54 tortillas showed the lowest crude fiber content. Otherwise, tortillas obtained from the M55xM54 hard grain had the lowest fat content and extensibility, while H-70 tortillas showed an intermediate breaking point and extensibility. M-54 and M54xM55 tortillas were softer due to their more swollen starch granules. In contrast, rigid tortillas were obtained from CML-242 and H-70. Grain hardness causes different morphology in starch and tortilla of maize genotypes. However, grain hardness did not influence the characteristics of texture in tortillas.
    Źródło:
    International Agrophysics; 2017, 31, 1
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    100G shortwave wavelength division multiplexing solutions for multimode fiber data links
    Autorzy:
    Cimoli, B.
    Estaran Tolosa, J. M.
    Rodes Lopez, G. A.
    Vegas Olmos, J. J.
    Monroy, I. T.
    Powiązania:
    https://bibliotekanauki.pl/articles/173811.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    vertical-cavity surface-emitting laser (VCSEL)
    multimode fiber
    MMF
    wavelength division multiplexing
    WDM
    Opis:
    We investigate an alternative 100G solution for optical short-range data center links. The presented solution adopts wavelength division multiplexing technology to transmit four channels of 25G over a multimode fiber. A comparative performance analysis of the wavelength-grid selection for the wavelength division multiplexing data link is reported. The analysis includes transmissions over standard optical multimode fiber (OM): OM2, OM3 and OM4.
    Źródło:
    Optica Applicata; 2016, 46, 3; 409-419
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Postcranial remains of basal typotherian notoungulates from the Eocene of northwestern Argentina
    Autorzy:
    Armella, M.A.
    Garcia-Lopez, D.A.
    Babot, M.J.
    Deraco, V.
    Herrera, C.M.
    Saade, L.
    Bertelli, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082173.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Mammalia
    Notoungulata
    calcaneum
    astragalus
    plantigrade
    foot stances
    Paleogene
    South America
    Opis:
    Notoungulates represent the most taxonomically diverse and temporally and geographically widespread group among South American native ungulates. Here, we analyze anatomical and systematic aspects of proximal tarsal bones recovered from the Lower and Upper Lumbrera formations (middle and late middle Eocene) in northwestern Argentina. We provide detailed descriptions, comparisons, and infer foot stances and range of movements for the taxa implicated. Material studied includes astragali belonging to the oldfieldthomasiid Colbertia lumbrerense (Lower Lumbrera Formation), a set of proximal tarsals referred as Typotheria indet. (Lower Lumbrera Formation), and tarsals (also including navicular and cuboid) of the informal taxon “Campanorco inauguralis” (Upper Lumbrera Formation). The comparison of the tarsals of Colbertia lumbrerense (middle Eocene of Argentina) with Colbertia magellanica (early Eocene of Brazil) reveals several differences including variations on the development and arrangement of articular facets, and the size of the dorsal astragalar foramen in the Argentinean species. The specimen of Typotheria indet. shows morphological affinities with basal interatheriid taxa. However, its larger size contrasting with the overall small body sizes of Eocene interatheriids precludes an indisputable taxonomic assignment. Concerning “Campanorco inauguralis”, our observations indicate that there is no morphological evidence for a close phylogenetic relationship with Mesotheriidae. It presents a “reversed alternating tarsus” condition, which is also observed in Leontiniidae, “Notohippidae”, Toxodontidae, and some typotherians. However, the spectrum of singularities exhibited by this form precludes the assessment of its relationships in the context of the Paleogene radiation of Typotheria and it is necessary to extend the comparison to Eocene notoungulates. Finally, in a morphofunctional context a plantigrade foot posture is inferred for the specimens here reported. These observations have the potential to provide functional proxies for paleoecological reconstructions to be applied to the study of the early radiation of these notoungulate faunas.
    Źródło:
    Acta Palaeontologica Polonica; 2020, 65, 2; 1-17
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Measurements of Concentration differences between Liquid Mixtures using Digital Holographic Interferometry
    Autorzy:
    Guerrero-Méndez, C.
    Saucedo-Anaya, T.
    Araiza-Esquivel, M.
    Balderas-Navarro, R. E.
    López-Martínez, A.
    Olvera-Olvera, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/221594.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Digital Holographic Interferometry
    refractive index measurements
    phase difference
    full-field measurements
    Opis:
    We present an alternative method to detect and measure the concentration changes in liquid solutions. The method uses Digital Holographic Interferometry (DHI) and is based on measuring refractive index variations. The first hologram is recorded when a wavefront from light comes across an ordinary cylindrical glass container filled with a liquid solution. The second hologram is recorded after slight changing the liquid’s concentration. Differences in phase obtained from the correlation of the first hologram with the second one provide information about the refractive index variation, which is directly related to the changes in physical properties related to the concentration. The method can be used − with high sensitivity, accuracy, and speed − either to detect adulterations or to measure a slight change of concentration in the order of 0.001 moles which is equivalent to a difference of 0.003 g of sodium chloride in solutions. The method also enables to measure and calculate the phase difference among each pixel of two samples. This makes it possible to generate a global measurement of the phase difference of the entire sensed region.
    Źródło:
    Metrology and Measurement Systems; 2017, 24, 1; 19-26
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Importance of reporting ancillary site characteristics, and management and disturbance information at ICOS stations
    Autorzy:
    Saunders, M.
    Dengel, S.
    Kolari, P.
    Moureaux, C.
    Montagnani, L.
    Ceschia, E.
    Altimir, N.
    Lopez-Ballesteros, A.
    Maranon-Jimenez, S.
    Acosta, M.
    Klumpp, K.
    Gielen, B.
    Op de Beeck, M.
    Hortangl, L.
    Merbold, L.
    Osborne, B.
    Grunwald, T.
    Arrouays, D.
    Boukin, H.
    Saby, N.
    Nicolini, G.
    Papale, D.
    Jones, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/25539.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Źródło:
    International Agrophysics; 2018, 32, 4
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Towards long-term standardised carbon and greenhouse gas observations for monitoring Europe´s terrestrial ecosystems: a review
    Autorzy:
    Franz, D.
    Acosta, M.
    Altimir, N.
    Arriga, N.
    Arrouays, D.
    Aubinet, M.
    Aurela, M.
    Ayres, E.
    Lopez-Ballesteros, A.
    Barbaste, M.
    Berveiller, M.
    Biraud, S.
    Boukir, H.
    Brown, T.
    Brummer, C.
    Buchmann, N.
    Burba, G.
    Carrara, A.
    Cescatti, A.
    Ceschia, E.
    Clement, R.
    Cremonese, E.
    Crill, P.
    Darenova, E.
    Dengel, S.
    D’Odorico, P.
    Filippa, G.
    Fleck, S.
    Fratini, G.
    Fub, R.
    Gielen, B.
    Gogo, S.
    Grace, J.
    Graf, A.
    Grelle, A.
    Gross, P.
    Grunwald, T.
    Haapanala, S.
    Hehn, M.
    Heinesch, B.
    Heiskanen, J.
    Herbst, M.
    Herschlein, C.
    Hortangl, L.
    Hufkens, K.
    Ibrom, A.
    Jolivet, C.
    Joly, L.
    Jones, M.
    Kiese, R.
    Klemendsson, L.
    Kljun, N.
    Klumpp, K.
    Kolari, P.
    Kolle, O.
    Kowalski, A.
    Kutsch, W.
    Laurila, T.
    De Ligne, A.
    Linder, S.
    Lindroth, A.
    Lohila, A.
    Longdoz, B.
    Mammarella, I.
    Manise, T.
    Maranon Jimenez, S.
    Matteucci, G.
    Mauder, M.
    Meier, P.
    Merbold, L.
    Mereu, S.
    Metzger, S.
    Migliavacca, M.
    Molder, M.
    Montagnani, L.
    Moureaux, C.
    Nelsson, D.
    Nemitz, E.
    Nicolini, G.
    Nilsson, M.B.
    Op de Beeck, M.
    Osborne, B.
    Lofvenius, M.O.
    Pavelka, M.
    Peichl, M.
    Peltola, O.
    Pihlatie, M.
    Pitacco, A.
    Pokorny, R.
    Pumpanen, J.
    Ratie, C.
    Rebmann, C.
    Roland, M.
    Sabbatini, S.
    Saby, N.P.A.
    Saunders, M.
    Schmid, H.P.
    Schrumpf, M.
    Sedlak, P.
    Serrano Ortiz, P.
    Siebicke, L.
    Sigut, L.
    Silvennoinen, H.
    Simioni, G.
    Skiba, U.
    Sonnentag, O.
    Soudani, K.
    Soule, P.
    Steinbrecher, R.
    Tallec, T.
    Thimonier, A.
    Tuittila, E.-S.
    Tuovinen, J.P.
    Vestin, P.
    Vncent, G.
    Vincke, S.
    Vitalle, D.
    Waldner, P.
    Weslien, P.
    Wingate, L.
    Wohlfahrt, G.
    Zahniser, M.
    Vesala, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/25745.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Źródło:
    International Agrophysics; 2018, 32, 4
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    P2P video streaming combining SVC and MDC
    Autorzy:
    López-Fuentes, F. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/907783.pdf
    Data publikacji:
    2011
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    sieć równorzędna
    strumieniowanie wideo
    kodowanie wideo
    kodowanie skalowalne
    peer-to-peer networks
    video streaming
    scalable video coding
    multiple description video coding
    Opis:
    In this paper we propose and evaluate a combined SVC-MDC (Scalable Video Coding & Multiple Description Video Coding) video coding scheme for Peer-to-Peer (P2P) video multicast. The proposed scheme is based on a full cooperation established between the peer sites, which contribute their upload capacity during video distribution. The source site splits the video content into many small blocks and assigns each block to a single peer for redistribution. Our solution is implemented in a fully meshed P2P network in which peers are connected to each other via UDP (User Datagram Protocol) links. The video content is encoded by using the Scalable Video Coding (SVC) method. We present a flow control mechanism that allows us to optimize dynamically the overall throughput and to automatically adjust video quality for each peer. Thus, peers with different upload capacity receive different video quality. We also combine the SVC method with Multiple Description Coding (MDC) to alleviate the packet loss problem. We implemented and tested this approach in the PlanetLab infrastructure. The obtained results show that our solution achieves good performance and remarkable video quality in the presence of packet loss.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2011, 21, 2; 295-306
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On operator ideals related to (p,σ)-absolutely continuous operators
    Autorzy:
    López Molina, J. A.
    Sánchez Pérez, E. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1206151.pdf
    Data publikacji:
    2000
    Wydawca:
    Polska Akademia Nauk. Instytut Matematyczny PAN
    Tematy:
    tensor norms
    operator ideals
    (p,σ)-absolutely continuous operators
    $g_{p,σ}$-nuclear and $g_{p,σ}$ integral operators
    Opis:
    We study tensor norms and operator ideals related to the ideal $P_{p,σ}$, 1 < p < ∞, 0 < σ < 1, of (p,σ)-absolutely continuous operators of Matter. If α is the tensor norm associated with $P_{p,σ}$ (in the sense of Defant and Floret), we characterize the $(α')^t$-nuclear and $(α')^t$- integral operators by factorizations by means of the composition of the inclusion map $L^r(μ) → L^1(μ) + L^p(μ)$ with a diagonal operator $B_w:L^{∞}(μ) → L^r(μ)$, where r is the conjugate exponent of p'/(1-σ). As an application we study the reflexivity of the components of the ideal $P_{p,σ}$.
    Źródło:
    Studia Mathematica; 2000, 138, 1; 25-40
    0039-3223
    Pojawia się w:
    Studia Mathematica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Linear differential equations of second, third, and fourth order
    Autorzy:
    Hernández-Galeana, A.
    López-Bonilla, J.
    López-Vázquez, R.
    Vidal-Beltrán, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1167198.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Abel-Liouville-Ostrogradski identity
    Euler-Lagrange method
    Linear differential equation
    Opis:
    We study the linear differential equations of second, third, and fourth order, accepting to know solutions of the corresponding homogeneous equation, then we show how to obtain one more solution for the homogeneous case and a particular solution for the original equation.
    Źródło:
    World Scientific News; 2018, 105; 225-232
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Propagators in quantum mechanics
    Autorzy:
    Hernández-Galeana, A.
    Rivera-Rebolledo, J.
    López-Bonilla, J.
    López-Vázquez, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1177837.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Green’s functions
    Propagators in quantum mechanics
    Opis:
    We consider one-dimensional non-relativistic quantum mechanics to exhibit that the propagators (Green’s functions) for free particle, linear potential and harmonic oscillator, are obtainable from purely classical means.
    Źródło:
    World Scientific News; 2018, 99; 249-253
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Review, classification and comparative analysis of maintenance management models
    Autorzy:
    Lopez, Campos, M.
    Crespo Marquez, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/384659.pdf
    Data publikacji:
    2009
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    maintenance
    management
    maintenance process
    maintenance model
    maintenance tools
    Opis:
    The present article does a chronological tour through some representative maintenance management models, describes them in a general way and classifies them according to their functioning under declarative models and under process oriented models. It distinguishes in addition the innovations proposed by each author and compares the elements appearing on each model with some of the points mentioned by the ISO 9001:2008 standard, as well as other criteria considered suitable to the case. From this analysis are derived the results between which are distinguished some desirable characteristics for a modern and efficient maintenance management model. In addition the application of these models for supporting industrial needs, as well as its future challenges are discussed too.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2009, 3, 3; 110-115
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Welding Effects on the Mechanical Integrity of a Trip800 Steel: a Comparison of Laser Co2 and Gmaw Processes
    Wpływ spawania na integralność mechanicznaą stali Trip800: porównanie spawania laserowego ze spawaniem elektrodą topliwą
    Autorzy:
    Perez-Medina, G. Y.
    Lopez, H. F.
    Reyes-Valdes, F. A.
    Garza-Gomez, A.
    Lopez-Ochoa, L. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/351511.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    laser
    GMAW
    retained austenite
    color metallography
    spawanie elektrodą topliwą
    austenit resztkowy
    metalografia barwna
    Opis:
    In this work a strip of a transformation induced plasticity (TRIP) steel was welded using gas metal arc welding (GMAW) and Laser CO2 welding (LBW) processes and the resultant strength and ductility of the welded joints evaluated. It was found that LBW lead to relatively high hardness in the fusion zone, FZ where the resultant microstructure was predominantly martensite. The relative volume fractions of phases developed in the welded regions were quantitatively measured using color metallography combined with X-ray diffraction analyses. It was found that the heat affected zone, HAZ developed the maximum amount of martensite (up to 32%) in the steel welded using LBW besides a mixture of bainite, retained austenite and ferrite phases. In contrast, a relatively low percent of martensite (10.8%) was found in the HAZ when the GMAW process was implemented.
    Pas ze stali typu TRIP poddano spawaniu elektrodą topliwą oraz spawaniu laserowemu i oceniono wytrzymałość i plastyczność uzyskanych połączeń spawanych. Stwierdzono, że spawanie laserowe prowadzi do uzyskania stosunkowo wysokiej twardości w strefie łączenia, gdzie powstała mikrostrukturę stanowi głównie martenzyt. Względne udziały objętościowe faz w spawanych obszarach zmierzono ilościowo za pomocą barwnej metalografii w połączeniu z dyfrakcyjną analizą rentgenowską. Stwierdzono, że w przypadku stali spawanej laserowo strefa wpływu ciepła zawiera najwięcej martenzytu (do 32%), a oprócz tego mieszanine bainitu, resztkowego austenitu i ferrytu. Natomiast w strefie wpływu ciepła uzyskanej podczas spawania elektrodą topliwą stwierdzono stosunkowo niską zawartość martenzytu (10,8%).
    Źródło:
    Archives of Metallurgy and Materials; 2014, 59, 4; 1427-1432
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Todorov’s formula involving Stirling numbers of the second kind and Nörlund polynomials
    Autorzy:
    Zúñiga-Segundo, A.
    López-Bonilla, J.
    Vidal-Beltrán, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1165650.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Bernoulli numbers
    Duality property
    Generalized chain rule of differentiation
    Hoppe’s formula
    Nörlund polynomials
    Stirling numbers
    Opis:
    We use the Todorov’s formula for the generalized Bernoulli numbers, in terms of Stirling numbers of the second kind, to deduce the Guo-Qi and Schläfli identities. Our approach is based in the duality property between the Stirling numbers, and in the Nörlund polynomials. We also consider the Janjic’s definitions for the Stirling numbers.
    Źródło:
    World Scientific News; 2018, 107; 201-206
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Continuity equations in curved spaces
    Autorzy:
    Thapa, G. Bahadur
    Hernández-Galeana, A.
    López-Bonilla, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1167152.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Energy and momentum in curved spaces
    Lagrangians in Riemannian spaces
    Noether’s theorem
    Rund-Lovelock’s relations
    Opis:
    In any Riemannian 4-space, we deduce continuity equations which could be interpreted as conservation laws for the energy and momentum of the gravitational field, with special emphasis in general relativity.
    Źródło:
    World Scientific News; 2018, 105; 197-203
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Using tags in an AIML-based chatterbot to improve its knowledge
    Autorzy:
    Mikic, F. A.
    Burguillo, J. C.
    Peleteiro, A.
    Rey-Lopez, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/305303.pdf
    Data publikacji:
    2012
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    AIML
    chatterbots
    folksonomies
    tagging
    natural language
    Opis:
    Nowadays, it is common to find on the Internet different conversational robots which interact with users simulating a natural language conversation. Among them, we can emphasize the chatterbots based on AIML language. In this paper we present an AIML based chatterbot that shows as its main contribution the use of tags and folksonomies. Thanks to its use, we can generate a context for each conversation, being able to maintain a state for each user in the system, and improving the adaptation capabilities of the bot.
    Źródło:
    Computer Science; 2012, 13 (2); 123-133
    1508-2806
    2300-7036
    Pojawia się w:
    Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Influence of hamstring extensibility on spinal and pelvic postures in highly trained paddlers
    Autorzy:
    López-Miñarro, Pedro A.
    Muyor, José M.
    Alacid, Fernando
    Powiązania:
    https://bibliotekanauki.pl/articles/449142.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Opolska. Wydział Wychowania Fizycznego i Fizjoterapii
    Tematy:
    thoracic
    lumbar
    pelvic
    spine
    straight leg raise
    Opis:
    Objectives. To determine whether the degree of hamstring muscle extensibility influences the sagittal spinal curvatures in standing and maximal trunk flexion on young athletes. Methods. Forty-two young elite kayakers (mean age: 15.09 ± 0.63 years) were recruited. Thoracic and lumbar curvatures and pelvic position were evaluated with a Spinal Mouse system in standing position and maximal trunk flexion with knees extended (toe-touch test) and flexed. Hamstring muscle extensibility was determined by passive straight leg raise test (PSLR). The sample was divided into two groups with regard to straight leg raise angle (PSLR < 80º, n=20, and PSLR ≥ 80º, n=20). Results. Subjects with lower extensibility presented higher thoracic angle and a more posterior pelvic tilt in maximal trunk flexion. However, no significant differences were found between both groups when standing. The lumbar curve was not affected by hamstring extensibility. Conclusions. Lower hamstring extensibility is related to increased thoracic curve and more posterior pelvic tilt when maximal trunk flexion is performed, which can overload the spine. A systematic stretching programme to improve hamstring extensibility should be incorporated into training activities.
    Źródło:
    Journal of Physical Education & Health - Social Perspective; 2013, 2, 4; 49-56
    2084-7971
    Pojawia się w:
    Journal of Physical Education & Health - Social Perspective
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Measurement of biological diversity of arthropods and respiration in soils managed under time-controlled and set-stocked grazing practices in central-west New South Wales, Australia
    Badania różnorodności biologicznej stawonogów i oddychanie w glebach o odmiennych systemach wypasania w centralno-zachodniej Nowej Południowej Walii, Australia
    Autorzy:
    Moulin, M.
    Lopez, J.
    Raman, A.
    Hodgkins, D.
    Adams, A.
    Mannix, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/906653.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
    Opis:
    In this study we compare the effects of two contrasting grazing regimes (time-controlled grazing (TCG) vs set-stocked grazing (SSG)) on selected parameters of soil biological health. The purpose of the study was to evaluate these soil parameters as potential indicators of soil health and thence sustainable soil management. Two parameters, viz., arthropod biological diversity and soil respiration were chosen as reliable indicators of soil health. Samples of pasture cover, arthropod populations, and soil from varied depths were obtained in spring (September-November 2010) and autumn (March-May 2011). Results from the autumn showed a strong effect of time-controlled grazing with increased arthropod abundance and enhanced soil biological respiration while in spring the differences were not significant. It was concluded that a change to short-duration rotational grazing can be beneficial to soil biological health in the longer term and that the measurement of arthropods present in the litter and topsoil can be a simple yet effective indicator of the impact of grazing regime on soil health.
    Źródło:
    Polish Journal of Soil Science; 2012, 45, 1
    0079-2985
    Pojawia się w:
    Polish Journal of Soil Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparative performance of three sampling techniques to detect airborne Salmonella species in poultry farms
    Autorzy:
    Adell, E.
    Moset, V.
    Zhao, Y.
    Jimenez-Belenguer, A.
    Cerisuelo, A.
    Cambra-Lopez, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/51993.pdf
    Data publikacji:
    2014
    Wydawca:
    Instytut Medycyny Wsi
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2014, 21, 1
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental and Theoretical Study of Zircon and Scheelite Phases of $DyVO_4$
    Autorzy:
    Ermakova, O.
    Paszkowicz, W.
    López-Solano, J.
    Muñoz, A.
    Dabkowska, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1431671.pdf
    Data publikacji:
    2012-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.70.Hj
    61.43.Bn
    61.66.Fn
    Opis:
    Polycrystalline zircon-type dysprosium orthovanadate, $DyVO_4,$ prepared from a single crystal grown by slow cooling from $PbO//PbF_2$ flux, was studied by X-ray diffraction. Rietveld refinement provided the following unit cell size and oxygen atom coordinates: a=7.14811(4) Å; c=6.30825(4) Å, V=322.323(3) Å3, y($O^{2-}$)=0.4300(4); z($O^{2-}$)=0.2082(4) which are of a particularly high accuracy and show consistency with earlier reported values. Density functional theory calculations within the generalized gradient approximation for the exchange-correlation energy were also performed, providing values of structure parameters which differ by less than 2% from the experimental ones. The agreement between theory and experiment demonstrates the value of these calculations for understanding the structure of compounds of $RVO_4$ family. In addition, density functional theory calculations were performed for the scheelite-type $DyVO_4$; also for this polymorph the discrepancy with the only known set of lattice parameters is less than 2%. Values of oxygen atom coordinates have not been reported yet for this polymorph; here, the calculated ones are quoted.
    Źródło:
    Acta Physica Polonica A; 2012, 121, 4; 920-927
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Exploring quality generating factors in customer-supplier relationships
    Badanie czynników generujących jakość w relacjach z klientami i dostawcami
    Autorzy:
    Rodríguez-López, N.
    Diz-Comesaña, M. E.
    Mondragón, A. E. C.
    Powiązania:
    https://bibliotekanauki.pl/articles/217168.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
    Tematy:
    customer supplier relationship
    quality relationship
    economic performance
    nonmetallic mineral product
    mining industry
    manufacturing industry
    relacja klient dostawca
    relacje jakościowe
    wydajność ekonomiczna
    przemysł wydobywczy
    przemysł przetwórczy
    niemetaliczne surowce mineralne
    Opis:
    The analysis of interorganizational relationships continues to attract academic research because of the influence that management of supply chain relationships has in business competitiveness. However, there are almost no studies about this decision in the mineral products industry. The purpose of this study is to investigate customer-supplier relationships in the non-metallic mineral products mining and manufacturing industry in order to determine what relational forms enable achieving better business competitiveness and higher quality relationships. To carry out this research, we propose a cohesive model comprising variables to characterize the transactions, the forms of governance and both economic and relational results. The paper is based on a transactional framework; thus, the adoption of one or another form of governance is addressed through the length of the relationship, the transmission of information and the dependencies between the agents. As for the outcome, the quality of the relationship is highlighted because of its importance in business competitiveness. The relational quality is understood as the stability of the relationship or the importance given by the buyer to maintaining the relationship or relational commitment. The hypotheses generated are contrasted by a structural equation model in a sample of 293 Spanish companies. The results confirm the importance of past relationships and integrated forms to get better results. In this sense, managers should encourage trust and dependencies because they positively affect performance. Trust and dependencies determine the choice of a vertical form of governance, and these factors, along with information, intervene in the quality of business relationships. Thus, it is possible to say that forms of governance do have effects on the interrelations between the characteristics of the transactions and the business performance.
    Analiza powiązań międzyorganizacyjnych jest atrakcyjna dla badań naukowych ze względu na wpływ, jaki ma zarządzanie relacjami w łańcuchu dostaw na konkurencyjność przedsiębiorstw. Niemniej jednak, w decyzjach dotyczących przemysłu mineralnego nie ma prawie żadnych badań na ten temat. W artykule dokonano badań relacji między klientami a dostawcami w przemyśle górniczym i przetwórczym niemetalicznych surowców mineralnych w celu określenia, jakie formy relacyjne umożliwiają osiągnięcie lepszej konkurencyjności przedsiębiorstw i wyższe relacje jakościowe. W celu przeprowadzenia tych badań autorzy proponują spójny model, zawierający zmienne charakteryzujące transakcje, formy zarządzania oraz wyniki ekonomiczne i relacyjne. Artykuł oparty jest na ramach transakcyjnych; tym samym przyjęcie jednej lub innej formy zarządzania jest realizowane poprzez długość relacji, przekazywanie informacji i zależności między agentami. Jeśli chodzi o wynik to jakość relacji jest zaznaczona ze względu na jego znaczenie w konkurencyjności przedsiębiorstw. Jakość relacyjna jest rozumiana jako stabilność relacji lub znaczenie przekazane przez nabywcę do utrzymania relacji lub relacyjnego zaangażowania. Wygenerowane hipotezy są przeciwstawiane modelowi równości strukturalnych na próbie 293 hiszpańskich firm. Wyniki potwierdzają znaczenie wcześniejszych relacji i zintegrowanych form w celu uzyskania lepszych wyników. W tym znaczeniu, menedżerowie powinni zachęcać do zaufania i zależności, ponieważ wpływa to pozytywnie na wydajność. Zaufanie i zależności decydują o wyborze pionowej formy zarządzania, a te czynniki wraz z informacjami wpływają na jakość relacji biznesowych. Można zatem powiedzieć, że formy zarządzania mają wpływ na wzajemne powiązania między charakterystykami transakcji a wynikami działalności.
    Źródło:
    Gospodarka Surowcami Mineralnymi; 2017, 33, 4; 157-176
    0860-0953
    Pojawia się w:
    Gospodarka Surowcami Mineralnymi
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The polyphenolic compounds content of a cardoon herb depending on length of the vegetation period
    Zawartość związków polifenolowych w zielu karda w zależności od długości okresu wegetacji roślin
    Autorzy:
    Sałata, A.
    Buczkowska, H.
    Lopez Galarza, S.V.
    Moreno-Ramon, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/11542995.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Tematy:
    polyphenolic compound
    cardoon zob.artichoke
    Cynara cardunculus
    artichoke thistle zob.artichoke
    cardone zob.artichoke
    cardoni zob.artichoke
    carduni zob.artichoke
    cardi zob.artichoke
    herb
    vegetation period
    artichoke
    flavonoids
    tannin
    phenolic acid
    chlorogenic acid
    Opis:
    The influence of vegetation period length of cardoon plants (Cynara cardunculus L.) on herb yield and its pharmacological value conditioned by chemical contents in air dried herb was examined in the research. The research conducted in the years 2009–2011 included valuation of total phenolic acids as equivalent to caffeic acid, flavonoids and tannins content in plants during their vegetative growth. The effect of the vegetation period length on cardoon plants yield was observed. The content of polyphenolic acids (caffeic, chlorogenic and cynarine) was marked with a performance liquid chromatography (HPLC).The contents of biologically active compounds depended on plants age – the most phenolic acids were noted in herb harvested from plants 120-days and 150-days old (1.86–2.58%). Herb obtained from plants of different age contained from 0.38 to 0.43% flavonoids. More tannins were accumulated in young cardoon plants after 90–120 days of cultivation (3.72–3.43%) in comparison to plants 150-days old (3.25%). The content of caffeic acid, chlorogenic acid and cynarin in cardoon herb depended on length of vegetation period of plants. The content of phenolic acids in leaves increased with time. Values of correlation coefficients indicate significant correlation of total phenolic acids and tannins content in cardoon herb. The higher content of total phenolic acids the lower content of tannins (R = -0.88). Strong correlation was noted between the content of total phenolic acids and the content of chlorogenic acid (R = 0.67) and caffeic acid (R = 0.78). On the basis of the results of the presented work it could be stated that cardoon leaves are a valuable material for herb industry.
    W pracy badano wpływ długości okresu wegetacji roślin karda (Cynara cardunculus L.) na jego wartość farmakologiczną, uwarunkowaną składem chemicznym surowca. Badania przeprowadzono w latach 2009–2011, oceniając zawartość kwasów fenolowych w przeliczeniu na kwas kawowy oraz flawonoidów i garbników w zależności od fazy rozwojowej roślin. Zawartość kwasów polifenolowych (kawowego, chlorogenowego i cynaryny) oznaczano z wykorzystaniem HPLC. Zawartość substancji biologicznie czynnych zależała od wieku roślin – największą ilość fenolokwasów stwierdzono w zielu zebranym z roślin 120- i 150-dniowych (1,86–2,58%). Ziele zebrane z roślin w różnym wieku zawierało 0,38–0,43% flawonoidów. Więcej garbników zgromadziły młodsze rośliny karda po 90–120 dniach uprawy (3,72–3,43%) w porównaniu z roślinami 150-dniowymi (3,25%). Zawartość kwasu kawowego, chlorogenowego i cynaryny w zielu karda zależała od długości okresu wegetacji roślin. Wraz z jego wydłużaniem zwiększała się zawartość tych kwasów fenolowych w liściach. Wartości współczynników korelacji wskazują na istotnie wysoką współzależność zawartości fenolokwasów ogółem i garbników w zielu karda. Większej zawartości fenolokwasów ogółem towarzyszy mniejsza zawartość garbników (R = -0,88). Silną korelację odnotowano pomiędzy zawartością fenolokwasów ogółem a zawartością kwasu chlorogenowego (R = 0,67) i kwasu kawowego (R = 0,78). Na podstawie uzyskanych wyników tej pracy można stwierdzić, że liście karda stanowią cenny surowiec dla przemysłu zielarskiego.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2015, 14, 4; 155-167
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cyclitols, galactosyl cyclitols and raffinose family oligosaccharides in Mexican wild lupin seeds
    Autorzy:
    Piotrowicz-Cieslak, A I
    Lopez, P.M.G.
    Gulewicz, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/57746.pdf
    Data publikacji:
    2003
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    wild lupin
    oligosaccharide
    lupin
    carbohydrate
    cyclitol
    galactosyl cyclitol
    Mexico
    seed
    Opis:
    Ten to 16 ethanol-soluble carbohydrate components were identified in the seeds of six Mexican wild lupins. The analysed carbohydrates included: monosaccharides, disaccharides, cyclitols, galactosyl cyclitols and raffinose family oligosaccharides. Stachyose and sucrose were the main carbohydrate component in the Lupinus montanus, L. rotundiflorus, L. exaltatus, L. mexicanus and L. elegans seeds. Only trace quantities of verbascose were detected in Lupinus mexicanus seeds. The analysed seeds accumulated 38 to 78 mg/g d.m. carbohydrates. The raffinose family oligosaccharides constituted 41 to 85.2% of the identified carbohydrate component pool. The analysed Lupinus seeds contained 3 to 8 unidentified carbohydrate components.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2003, 72, 2
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of the JWL Constants for ANFO and Emulsion Explosives from Cylinder Test Data
    Autorzy:
    Sanchidrián, J. A.
    Castedo, R.
    López, L. M.
    Segarra, P.
    Santos, A. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/358385.pdf
    Data publikacji:
    2015
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    cylinder test
    JWL equation of state
    LS-DYNA
    ANFO
    emulsion explosives
    Opis:
    The Jones-Wilkins-Lee (JWL) equation of state parameters for ANFO and emulsion-type explosives have been obtained from cylinder test expansion measurements. The calculation method comprises a new radial expansion function, with a non-zero initial velocity at the onset of the expansion in order to comply with a positive Gurney energy at unit relative volume, as the isentropic expansion from the CJ state predicts. The equations reflecting the CJ state conditions and the measured expansion energy were solved for the JWL parameters by a non-linear least squares scheme. The JWL parameters of thirteen ANFO and emulsion type explosives have been determined in this way from their cylinder test expansion data. The results were evaluated through numerical modelling of the tests with the LS-DYNA hydrocode; the expansion histories from the modelling were compared with the measured ones, and excellent agreement was found.
    Źródło:
    Central European Journal of Energetic Materials; 2015, 12, 2; 177-194
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Laboratory of Natural Radiation (LNR) : a place to test radon instruments under variable conditions of radon concentration and climatic variables
    Autorzy:
    Quindós Poncela, L. S.
    Sainz Fernández, C.
    Gutiérrez-Villanueva, J.-L.
    Fuente Merino, I.
    Celaya González, C.
    Quindós López, L.
    Quindós López, J.
    Fernández Lopez, E.
    Fernández Villar, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/147764.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    active monitors
    interlaboratory comparison
    in-situ
    radon
    Opis:
    The publication of the new European Union Basic Safety Standards represents a remarkable milestone in the fi eld of radiological protection in terms of adding radon exposure to this framework. Therefore, the coming years will bring the need to measure radon not only in the workplaces but also in the living spaces as a direct outcome of the application of the new EU Directive. So, the importance of having reliable instruments is evident and interlaboratory exercises are becoming more and more popular. However, most of them are carried out under constant conditions of meteorological variables. We present in this paper a facility to broaden the interlaboratory comparisons further by adding the study of radon exposures under real conditions of changes in climatic parameters. In addition, the facility has the possibility to verify the response of radon monitors when the radon concentration changes several orders of magnitude in a short period of time. Our work shows some results of one of the interlaboratory exercises carried out in the premises, where the radon levels were rather homogeneous in the testing room.
    Źródło:
    Nukleonika; 2016, 61, 3; 275-280
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Low seroprevalence of Trypanosoma cruzi infection and chronic chagasic cardiomyopathy in a region with abundance of triatomine vectors in Yucatan Peninsula of Mexico
    Autorzy:
    Monteon, V.
    Solis-Oviedo, R.
    Lopez, R.
    Hernandez, O.
    Tellez, C.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/5865.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Tematy:
    seroprevalence
    Trypanosoma cruzi
    parasitic infection
    chronic Chagas cardiomyopathy
    Chagas disease
    triatomine vector
    Yucatan Peninsula
    Mexico
    Opis:
    The Yucatan Peninsula of Mexico is endemic with Chagas disease. The main vector responsible for Trypanosoma cruzi transmission is Triatoma dimidiata which is abundant in domestic, peridomestic and sylvan cycles. The abundance of vectors favours T. cruzi transmission and is a high risk for developing chronic chagasic cardiomyopathy (CCC). In the past 10 years, little information was available on parasite seroprevalence and the prevalence of CCC in the Yucatan Peninsula. In the present work, we studied two Mayan communities with a high abundance of T. dimidiata and a random serial sample of 233 patients with an altered electrocardiogram or cardiac failure admitted to the Regional Hospital. A homemade enzyme-linked immunosorbent assay and indirect immunofluorescence standardized techniques were used to detect anti-T. cruzi IgG. In addition, Mayan volunteers were monitored by electrocardiography. In the Mayan communities, 4.8% (3/63) subjects were positive for T. cruzi antibodies none of them presented electrocardiographic alterations, however in seronegative subjects were detected right or left ventricle hypertrophy in 25% (16/63). A remarkable finding was that 90% of the Mayan population recognized the vector and 65% of them had experienced contact with triatomines bites. At the Regional Hospital 0.42% (1/233) were positive for T. cruzi antibodies showing compatible diagnosis with CCC; the most frequent pathology in this population was hypertension in 65% (151/233) and the less frequent was dilated myocardiopathy 6% (14/233). In conclusion, the prevalence of T. cruzi infection and CCC can be considered low in Yucatan, Mexico.
    Źródło:
    Annals of Parasitology; 2015, 61, 4
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Antioxidant activity and cytotoxic effect of Chilean Buddleja globosa (matico) and Ribes magellanicum (zarzaparrilla) flower extracts
    Autorzy:
    Zamorano-Aguilar, P.
    Morales, M.
    Rivillas, Y.
    López, J.
    Rojano, B.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/12989165.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2020, 19, 6; 59-70
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    THE EFFECT OF SCHOOL PHYSICAL EDUCATION PROGRAMMES ON LOW-BACK PAIN IN SCHOOLCHILDREN
    Autorzy:
    Rodríguez-García, Pedro L.
    López-Miñarro, Pedro A.
    Santonja, Fernando M.
    Powiązania:
    https://bibliotekanauki.pl/articles/449204.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Opolska. Wydział Wychowania Fizycznego i Fizjoterapii
    Tematy:
    spine
    physical exercises
    children
    adolescents
    Opis:
    Objective: to evaluate the efficacy of a 32-week school physical education programme on low-back pain in elementary and secondary schoolchildren. Material and methods: Forty-one elementary school children (fifth-grade, mean age of 10.27 ± 0.31 years) and 43 secondary school adolescents (twograde, mean age of 13.46 ± 0.68 years) were assigned to the control (n = 40) or intervention group (n = 44). The intervention subjects were involved in an organised physical education programme including hamstrings stretching, endurance strength of the abdominal and lumbar muscles, and pelvic tilt during the two-weekly school physical education classes over 32 weeks. The control group was not subjected to the organized programme. Low back pain was registered and pain intensity was recorded using the Visual Analogue Scale. Results: The experimental group showed a statistically significant decrease of low back pain frequency while the control group evidenced an increase. For pain intensity no significant differences were found. Conclusion: The children and adolescents who were subjected to the school physical education programme showed a reduction of low back pain frequency, while a tendency toward the rising frequency of low back pain was detected for the control subjects.
    Źródło:
    Journal of Physical Education & Health - Social Perspective; 2013, 2, 4; 43-48
    2084-7971
    Pojawia się w:
    Journal of Physical Education & Health - Social Perspective
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Manufacture of Toughened Al2O3-Based Composites by the Combination of RBAO and SPS Processes
    Autorzy:
    Rocha-Rangel, Enrique
    Calles-Arriaga, Carlos A.
    López-Hernández, Juan
    Rodríguez-García, José A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2203745.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    RBAO process
    SPS process
    Al2O3
    fracture toughness
    ceramic composites
    Opis:
    The effect of additions of silver or titanium (0.5 or 3 vol.%) microparticles on the microstructure, as well as some physical properties of Al2O3-based composites, were studied. The processing method for the manufacturing of alumina-based composites was a combination of RBAO and SPS processes. After the SPS process, bodies with almost full density were obtained. Observations by optical microscopy show a very fine and homogenous microstructure in all samples. Concerning mechanical properties, the addition of metals on alumina increases its fracture toughness significantly (112% for the sample with additions of silver, while the composite with additions of titanium fracture toughness increases by 72%). In terms of optical properties, both silver and titanium improve the absorbance in the visible range.
    Źródło:
    Archives of Metallurgy and Materials; 2023, 68, 1; 249--255
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The first record of Galba cubensis (L. Pfeiffer, 1839) (Mollusca: Gastropoda: Lymnaeidae) from open fields of Europe
    Autorzy:
    Schniebs, K.
    Gloer, P.
    Quinonero-Salgado, S.
    Lopez-Soriano, J.
    Hundsdoerfer, A.K.
    Powiązania:
    https://bibliotekanauki.pl/articles/83441.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
    Źródło:
    Folia Malacologica; 2018, 26, 1
    1506-7629
    Pojawia się w:
    Folia Malacologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The economic valuation of ecosystem services: bibliometric analysis
    Autorzy:
    Velasco-Muñoz, Juan F.
    Aznar-Sánchez, José A.
    Schoenemann, Marina
    López-Felices, Belén
    Powiązania:
    https://bibliotekanauki.pl/articles/19322636.pdf
    Data publikacji:
    2022
    Wydawca:
    Instytut Badań Gospodarczych
    Tematy:
    ecosystem services
    natural resources management
    sustainable development
    market based valuation
    revealed-stated preferences
    transfer value methods
    Opis:
    Research background: The services provided by ecosystems are the main support for human populations and for the development of any type of activity. Today, the provision of these services is under threat. The economic valuation of ecosystem services is vital to design appropriate policies, define strategies and manage ecosystems. Purpose of the article: The objective of this study is to analyse the evolution of research on the economic valuation of ecosystem services over the last two decades. More specifically, it aims firstly to identify the main agents driving research and, secondly, it seeks to synthesize in a single document the relevant information on the main economic valuation methods, relating them to the categories of services, ecosystems and regions where they have been employed. Methods: A quantitative review was first carried out through a bibliometric analysis to identify the main drivers of this line of research and its development trends. Secondly, a qualitative review was conducted through a systematic review focusing on the most commonly used valuation techniques in relation to the characteristics of the service, the geographical scope and the ecosystem analysed. Findings & value added: The main novelty of this work, compared to previous literature, is that the relationship between the study area, the type of ecosystem, the category of service and the economic valuation methodology are analysed for the first time. The results highlight the need to continue expanding knowledge in relation to the temporal and spatial scale in the economic value of ecosystem services, the subjective nature of the estimates and the heterogeneity between the different social sectors with respect to the benefit obtained.
    Źródło:
    Oeconomia Copernicana; 2022, 13, 4; 977-1014
    2083-1277
    Pojawia się w:
    Oeconomia Copernicana
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of the friction coefficients of chestnut (Castanea sativa Mill.) sawn timber
    Autorzy:
    Villar-Garcia, J.R.
    Vidal-Lopez, P.
    Corbacho, A.J.
    Moya, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082657.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    wood
    mechanical properties
    friction coefficient
    direct shear test
    Opis:
    This work provides the values of both the static and the kinetic friction coefficients for chestnut (Castanea sativa Mill.) of Spanish origin. Knowledge concerning these coefficients has its main application in the study of agroindustrial structures and machinery with timber members in contact. This determination was developed taking into account the timber anisotropy to establish surfaces and directions of slipping. A modified direct shear test device was used to conduct the tests and reproduce the tribological system. This procedure was functional and reliable and considered suitable for standardizing the friction measurement between timber surfaces, since this device is widely distributed in geotechnical and materials laboratories and the European codes do not specify a procedure or device to carry it out. The average values obtained were 0.46 for the static coefficient and 0.33 for the kinetic one, without considering the surfaces and directions of slipping. These values ranged between 0.36 and 0.55 for the static friction coefficient and between 0.28 and 0.39 for the kinetic friction coefficient depending on the direction considered and also taking into account the anisotropy of the timber. A good correlation was obtained between both coefficients, thus allowing for the estimation of the kinetic coefficient from the static one.
    Źródło:
    International Agrophysics; 2020, 34, 1; 65-77
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characterization of sub-channel based Málaga atmospheric optical links with real β parameter
    Autorzy:
    López-González, F. J.
    Jurado-Navas, A.
    Garrido-Balsells, J. M.
    Castillo-Vázquez, M.
    Puerta-Notario, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/174807.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    Malaga distribution
    generalized-K distribution
    atmospheric optical communications
    atmospheric propagation
    atmospheric turbulence
    scintillation
    Opis:
    A generalization of the Málaga atmospheric optical communications links treated as a finite number of generalized-K distributed sub-channels is analyzed in terms of outage probability and outage rate when its β parameter belongs to the set of real numbers. To the best of the author’s knowledge, this is the first time that β ∈ ℜ is considered. The new analytical expressions derived in this paper lead to a new physical and more realistic interpretation of atmospheric optical links, especially in terms of performance.
    Źródło:
    Optica Applicata; 2017, 47, 4; 545-556
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Engine diagnosis based on vibration analysis using different fuel blends
    Autorzy:
    Grajales, J. A.
    Quintero, H. F.
    López, J. F.
    Romero, C. A.
    Henao, E.
    Cardona, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/328420.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    engine diagnosis
    vibration analysis
    frequency analysis
    diagnostyka silnika
    analiza drgań
    analiza częstotliwościowa
    Opis:
    Fault diagnosis of an internal combustion engine is proposed herein by means of vibration analysis and a comparative analysis of normal operation and induced misfire scenarios. In order to validate previous works on misfire with pure gasoline, measurements also included tests performed with ethanol-gasoline fuel blends. According to results, changes in the fuel mix seem to have little impact on the performance and behaviour of the engine. And additionally, the particular frequency components that allowed differentiation between normal and faulty conditions were also present on all the fuel blends tested. Fast Fourier Transform was applied to obtain the frequency domain of the signal as a previous step to the subsequent identification process based on statistical characteristics extraction. A fuel blend classification method based on the analysis of the vibration signals of the engine was studied using envelope, Spike Energy and Peak Value techniques. Differentiation was possible with the extraction of the statistical features of the Peak Value spectrum of the longitudinal acceleration with a specific filter selection.
    Źródło:
    Diagnostyka; 2017, 18, 4; 27-36
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Polyphenolic composition of Spanish cultivars of globe artichoke (Cynara cardunculus L. var. scolymus (L.) Fiori)
    Autorzy:
    Pérez-Esteve, É.
    Sałata, A.
    Barat, J.M.
    Stępniowska, A.
    López-Galarza, S.
    Nurzyńska-Wierdak, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/11897335.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Tematy:
    plant cultivation
    cardoon
    Cynara cardunculus
    polyphenolic composition
    Opal cultivar
    Concerto cultivar
    Symphony cultivar
    Madrigal cultivar
    Blanca de Tudela cultivar
    A-106 cultivar
    herbal plant
    medicinal plant
    phenolics content
    chlorogenic acid
    apigenin
    cynarin
    Opis:
    Globe artichoke (Cynara cardunculus L. var. scolymus (L.) Fiori) is an edible herbaceous perennial plant that plays an important economic role in Mediterranean agriculture. In recent years, extensive research, which aimed to characterize the phenolic profile of the most important globe artichoke cultivars in Italy, has been conducted. However, very little information is available on the phenolic composition of cultivars traditionally grown in Spain. In this work, six cultivars (‘Opal’, ‘Symphony’, ‘Concerto’, ‘Madrigal’, ‘Blanca de Tudela’ and ‘A-106’) cultured in Spain were characterized according to their phenolic content. The phenolic profile differed between cultivars, and also between flower parts. The major phenolic compound in all the different cultivars was chlorogenic acid. Of the six studied cultivars, ‘Madrigal’ had the highest phenolic content.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2018, 17, 2; 177-184
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Importance of Internet And Online Social Networks in the Spanish Hotel Sector
    Autorzy:
    Infante-Moro, A.
    Infante-Moro, J-C.
    Martínez-López, F-J.
    García-Ordaz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/118135.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Promocji Wiedzy
    Tematy:
    hotels
    online social networks
    internet
    e-commerce
    cross-sectional study
    Opis:
    This paper is a cross-sectional study on the use of Internet and Online Social Networks in the Spanish hotel sector compared to Spanish companies in other sectors. The conclusions from this extensive survey are that the use of online social networks is more important and is more developed in the hotel sector than in Spanish companies in general. However, although it gives considerable importance to online social networks, the hotel sector needs to revise its rules of usage. The use of new tools such as e-commerce to sell the hotel stays must increase, and marketing efforts should be geared more towards online social networks because the hotel sector is currently losing ground in a market that generates more and more potential clients and sales by the day.
    Źródło:
    Applied Computer Science; 2016, 12, 1; 75-86
    1895-3735
    Pojawia się w:
    Applied Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Environmental distribution of post-Palaeozoic crinoids from the Iberian and south-Pyrenean basins, NE Spain
    Autorzy:
    Zamora, S.
    Aurell, M.
    Veitch, M.
    Saulsbury, J.
    Lopez-Horgue, M.A.
    Ferratges, F.A.
    Arz, J.A.
    Baumiller, T.K.
    Powiązania:
    https://bibliotekanauki.pl/articles/22586.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Opis:
    Post-Palaeozoic crinoids from northeast Spain ranging from the Ladinian (Middle Triassic) to the Ilerdian (lower Ypresian, early Eocene) are documented. Here we provide the first attempt to reconstruct the environmental distribution of these crinoids based on relatively complete material (mostly cups). Triassic forms are dominated by encrinids from outer carbonate ramps. Late Jurassic crinoids are dominated by cyrtocrinids, comatulids, millericrinids, and isocrinids, occurring either on sponge mounds and meadows or on soft substrates within middle to outer carbonate ramps. Aptian (Early Cretaceous) forms include nearly complete isocrinids which are found in extremely shallow environments represented by bioclastic carbonates and interspersed oyster-rich layers. Other Aptian occurrences come from more distal and deep environments and are composed solely of comatulids. Albian forms are dominated by cyrtocrinids and isocrinids associated with coral reefs. Late Cretaceous and Eocene crinoids include mostly bourgueticrinids (Comatulida) that are found either in outer ramp facies or associated with mid-ramp reef complexes. The later corresponds to one of the shallowest occurrence of bourgueticrinids in the Cenozoic. The palaeoecological data for fossil crinoids of northeast Spain contributes to reconstructing the history of the bathymetric distribution of articulate crinoids, supporting the idea that stalked crinoids were able to inhabit a wide range of shallow marine environments in the late Mesozoic and early Cenozoic.
    Źródło:
    Acta Palaeontologica Polonica; 2018, 63, 4
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    ReSySTER: A hybrid recommender system for Scrum team roles based on fuzzy and rough sets
    Autorzy:
    Colomo-Palacios, R.
    González-Carrasco, I.
    López-Cuadrado, J. L.
    García-Crespo, Á.
    Powiązania:
    https://bibliotekanauki.pl/articles/331282.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    zbiór rozmyty
    zbiór przybliżony
    Scrum
    pakiet roboczy
    system polecenia
    fuzzy set
    rough set
    work package
    recommender system
    Opis:
    Agile development is a crucial issue within software engineering because one of the goals of any project leader is to increase the speed and flexibility in the development of new commercial products. In this sense, project managers must find the best resource configuration for each of the work packages necessary for the management of software development processes in order to keep the team motivated and committed to the project and to improve productivity and quality. This paper presents ReSySTER, a hybrid recommender system based on fuzzy logic, rough set theory and semantic technologies, aimed at helping project leaders to manage software development projects. The proposed system provides a powerful tool for project managers supporting the development process in Scrum environments and helping to form the most suitable team for different work packages. The system has been evaluated in a real scenario of development with the Scrum framework obtaining promising results.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2012, 22, 4; 801-816
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sociocultural valuation of ecosystem services in protected areas: A study applied to Southeast Spain
    Autorzy:
    López-Felices, Belén
    Schoenemann, Marina
    Román-Sánchez, Isabel M.
    Aznar-Sánchez, José A.
    Powiązania:
    https://bibliotekanauki.pl/articles/39828080.pdf
    Data publikacji:
    2023
    Wydawca:
    Instytut Badań Gospodarczych
    Tematy:
    policy support
    protected area
    natural resources management
    behavioural economics
    stakeholders
    sustainable development
    Opis:
    Research background: Protected areas (PAs) play a fundamental role in the maintenance of ecosystem processes and in the flow of ecosystem services (ESs) they provide. However, the management of PAs is complex due to the existence of different stakeholders with disparate and, often, opposed preferences and valuations. The sociocultural assessment of ESs contributes to optimizing the management of scarce resources based on the preferences of the different stakeholders, taking into account the economic, environmental and social dimensions of the analysed area. Purpose of the article: In this work, a sociocultural assessment of the ESs provided by a PA in southeast Spain is carried out. The objective is to identify which the various ESs provided by this PA are and to establish their degree of importance for all the stakeholders involved. Methods: For this, different complementary methodologies have been used in successive phases, both qualitative and quantitative. Specifically, a literature review, in-depth interviews and an assessment questionnaire were used. Findings & value added: Based on the results obtained, a series of measures are proposed to improve the sustainable management of the PA and the socioeconomic development of its environment. The results of this study may be useful for PAs whose management tries to find a balance between conservation measures and the design of models that contribute to the socioeconomic development of their area of influence.
    Źródło:
    Oeconomia Copernicana; 2023, 14, 4; 1257-1302
    2083-1277
    Pojawia się w:
    Oeconomia Copernicana
    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:
    Techno-Functional and Bioactive Properties and Chemical Composition of Guava, Mamey Sapote, and Passion Fruit Peels
    Autorzy:
    López-Martínez, Leticia X.
    Villegas-Ochoa, Mónica A.
    Domínguez-Avila, J. Abraham
    Yahia, Elhadi M.
    Gonzalez-Aguilar, Gustavo A.
    Powiązania:
    https://bibliotekanauki.pl/articles/24024619.pdf
    Data publikacji:
    2023-11-02
    Wydawca:
    Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
    Tematy:
    tropical fruits
    phenolic profile
    antioxidant potential
    enzyme inhibition
    glucose adsorption capacity
    fat/oil binding capacity
    sodium cholate binding capacity
    Opis:
    Due to their nutritional and sensorial characteristics, tropical fruits like guava, mamey sapote, and passion fruit are regularly incorporated into daily diets. Their by-products, especially peels, are approximately 10 to 35% of their weight and possess an important content of bioactive compounds, such as dietary fiber and phenolics. The nutritional, technological, physio-functional properties and phenolic compound compositions of guava, mamey sapote, and passion fruit peels were studied. Peels had promising techno- and physio-functional characteristics, good dietary fiber contents (45.18-61.42 g/100 g), and phenolic profiles with ferulic acid, gallic acid, p-coumaric, and catechin as the main compounds. Peel powders also showed excellent DPPH radical scavenging activity (125.3–252.4 µmol TE/100 g) and Trolox equivalent antioxidant capacity, TEAC (369.2–656.8 µmol TE/100 g). The α-amylase and lipase inhibitory activity varied from 28.15 to 51.4% and 30.89 to 57.15%, respectively. Higher values of α-glucosidase inhibition capacity were found, ranging from 51.64 to 70.32%. The chemical composition and properties reported in the present work suggest that peel powders of these guava, mamey sapote, and passion fruit could be used as constituents in different foods, such as bakery and meat goods, with beneficial health effects like control of hyperglycemia, improved intestinal function, and control of overweight; however, more studies are necessary for animal models and humans to confirm these bioactivities conclusively.
    Źródło:
    Polish Journal of Food and Nutrition Sciences; 2023, 73, 4; 311-321
    1230-0322
    2083-6007
    Pojawia się w:
    Polish Journal of Food and Nutrition Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A posteriori error estimates for beams with inexact flexural stiffness representation
    Autorzy:
    Torii, André J.
    Gracite, Paula M.A.
    Miguel, Leandro F.F.
    Lopez, Rafael H.
    Powiązania:
    https://bibliotekanauki.pl/articles/24201505.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    beam
    error estimate
    inexact stiffness
    belka
    oszacowanie błędów
    Opis:
    In this work, we present a posteriori error estimates for the Euler-Bernoulli beam theory with inexact flexural stiffness representation. This is an important subject in practice because beams with non-uniform flexural stiffness are frequently modeled using a mesh of elements with constant stiffness. The error estimates obtained in this work are validated by means of two numerical examples. The estimates presented here can be employed for adaptive mesh refinement.
    Źródło:
    Journal of Applied Mathematics and Computational Mechanics; 2023, 22, 2; 62--74
    2299-9965
    Pojawia się w:
    Journal of Applied Mathematics and Computational Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A nonlinear model for the elastoplastic analysis of 2D frames accounting for damage
    Nieliniowy model do sprężysto-plastycznej analizy problemu uszkodzeń dwuwymiarowych ram
    Autorzy:
    Lorenzana, A.
    López-Reyes, P. M.
    Chica, E.
    Teran, J. M. G.
    Cacho, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/281011.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    plastic methods
    structural analysis
    material nonlinearities
    elastoplastic stiffness matrix
    Bonora damage model
    Opis:
    A simple and efficient procedure for non-linear analysis of frames is presented, under the hypothesis that the non-linear effects, if appear, are concentrated in the beam-ends.We consider a damage model based on Continuum Damage Mechanics, but affecting the cross-section as a whole. The elastoplastic behaviour is included formulating the tangent elastoplastic stiffness matrix in such a way that the yield function, in terms of internal forces (axial, shear and bending moment), is affected by the damage in each plastic cross-section. After the verification of the model, an example of application is solved for different assumptions on the yield function (depending on the internal forces considered) with the damage being taken into account or disregarded. The differences on the collapse load, for each case, are shown and some conclusions obtained, among them that the method can evaluate in a more accurate way the load that causes the collapse of frames under increasing loading, considering a fully plastic non-linear analysis.
    W pracy zaprezentowano prostą i skuteczną metodę nieliniowej analizy dwuwymiarowych ram przy założeniu hipotezy, że efekty nieliniowe, jeśli występują, są skoncentrowane na końcach belek tworzących układ ramy. Rozważono kontynualny model procesu zniszczenia obejmujący przekrój belki jako całość. Właściwości elasto-sprężyste materiału ujęto poprzez zdefiniowanie macierzy stycznej sztywności sprężysto-plastycznej w taki sposób, że funkcja uplastycznienia wyrażona w kategoriach obciążeń wewnętrznych (sił osiowych, tnących oraz momentu gnącego) zależy od stanu zniszczenia w każdym uplastycznionym przekroju. Po zweryfikowaniu modelu, rozwiązano przykład zastosowania analizy dla różnych założeń narzuconych na funkcję uplastycznienia (w zależności od wziętych pod uwagę obciążeń wewnętrznych) z uwzględnieniem zniszczenia lub bez. Dla każdego przypadku pokazano różnice w wartościach obciążenia zewnętrznego prowadzącego do wyboczenia ramy oraz sformułowano wnioski. Wykazano, że przedstawiona metoda nieliniowej analizy uplastycznienia pozwala na bardziej precyzyjne określenie krytycznych obciążeń prowadzących do zniszczenia konstrukcji.
    Źródło:
    Journal of Theoretical and Applied Mechanics; 2011, 49, 2; 515-529
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Enzyme activities regulating ROS metabolism in olive ( Olea europaea L.) seeds
    Autorzy:
    Zienkiewicz, A.
    Jimenez-Quesada, M.
    Traverso, J.
    Zafra, A.
    Lopez-Huertas, E.
    Zienkiewicz, K.
    Castro, A.
    Rodriguez-Garcia, M.
    Alche, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/79927.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    conference
    enzyme activity
    reactive oxygen species
    metabolism
    olive
    Olea europaea
    seed
    antioxidative enzyme
    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:
    Nutritional and antioxidant profile of the Physalis fruit grown in three Andean regions of Peru
    Autorzy:
    Obregón-La Rosa, A.J.
    Contreras-López, E.
    Juárez, E.F.
    Barrón, U.G.
    Muñoz, A.M.
    Ramos-Escudero, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/28765541.pdf
    Data publikacji:
    2023
    Wydawca:
    Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
    Opis:
    Background. Physalis peruviana L. fruit contains nutritional and bioactive compounds of immense importance to public health and represents a potential ingredient for the development of functional foods and beverages. Objective. This study aimed to determine the chemical and nutritional composition as well as the antioxidant capacity of the P. peruviana L. fruit grown in Peru in three areas of the Central Andean region. Material and methods. Proximal and physicochemical analyses and estimation of mineral content, vitamin C, total carotenoids, total polyphenols, and antioxidant capacity (2, 2-diphenyl-1-picrylhydrazyl [DPPH] and 2, 2′-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) [ABTS] assays) were performed using standardized methods. Results. The fruits were collected from three regions of the Peruvian Andes (Ancash, Cajamarca, and Cusco). The results showed that the content of potassium (306.54–327.60 mg/100 g) and iron (12.93–14.47 mg/kg) was prominent. The Physalis fruit had high levels of vitamin C (47.20–52.20 mg/100 g), total polyphenols (68.17–83.40 mg equivalents of gallic acid/100 g), and carotenoids (1.12–1.73 mg β-carotene/100 g). Higher values for antioxidant capacity were obtained with the ABTS method (896–1003.33 μmol Trolox/100 g) than with the DPPH method (290–309 μmol Trolox/100 g). Conclusions. This study confirms that the P. peruviana fruit has properties that could provide important health benefits and that it could be used for the development of functional foods and food supplement.
    Źródło:
    Roczniki Państwowego Zakładu Higieny; 2023, 74, 1; 49-57
    0035-7715
    Pojawia się w:
    Roczniki Państwowego Zakładu Higieny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    High performance quantum key distribution prototype system using a commercial off-the-shelf solution: experimental and emulation demonstrations
    Autorzy:
    Lopez-Leyva, J. A.
    Ruiz-Higuera, J.
    Arvizu-Mondragon, A.
    Santos-Aguilar, J.
    Ramos-Garcia, R.
    Ponce-Camacho, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/174150.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    quantum cryptography
    final secret key rate
    FSecKR
    coherent states
    Opis:
    A continuous variable-quantum key distribution system prototype that uses weak coherent states with a diffused phase, commercial off-the-shelf devices, complete free space 90-degrees hybrid and simplified quantum protocol is proposed in this paper. In general, the quantum transmitter-receiver shows an experimental average quantum bit error rate of 30% using auto-homodyne detection with 0.25 photons per pulse in locking phase mode. The emulated final secret key rate measurements were 20 and 40 Kbps for minimum (30 Mbps) and maximum (90 Mbps) throughput, respectively, in a real traffic network using databases for the quantum keys generated by two true random number generators.
    Źródło:
    Optica Applicata; 2017, 47, 3; 411-419
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Aluminium Morphological Modification by Nitrogen-Argon Mixture PIII
    Autorzy:
    Muñoz-Castro, A.
    López-Callejas, R.
    Valencia Alvarado, R.
    Peña-Eguiluz, R.
    Mercado-Cabrera, A.
    Barocio, S.
    Rodríguez-Méndez, B.
    de la Piedad-Beneitez, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1504099.pdf
    Data publikacji:
    2011-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    52.40.Hf
    52.77.Dq
    81.65.-b
    61.05.cp
    62.20.Qp
    68.37.Hk
    Opis:
    With incident fluences of ≈ $10^{12}$ atoms/$cm^2$ aluminium samples have been plasma immersion ion implanted with either pure nitrogen or argon/nitrogen mixtures at temperatures around 450°C. X-ray diffraction studies have validated the formation of the cubic phase of AlN, in samples treated with both the gas mixtures and pure nitrogen. Likewise, the presence of the hexagonal phase of AlN has been detected when either pure nitrogen or a 70%N/30%Ar mixture have been used. The signature peak of AlN has also been confirmed by the Raman spectroscopy. The maximal microhardness values were found in samples treated with the mixture. The maximal roughness was achieved with the equal part mixture in all cases, although increasing with the implantation pulse width up to a 300 nm peak at 150 μs. The latter critical value remains invariant under the pure nitrogen plasma treatment, provided that implantation periods in the order of 4.5 h are carried out.
    Źródło:
    Acta Physica Polonica A; 2011, 120, 1; 167-170
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Corrosion Enhancement due to Plasma Post-Oxidation Subsequent to Plasma Nitriding of a Steel AISI 4140
    Autorzy:
    Muñoz-Castro, A.
    de la Piedad-Beneitez, A.
    Valencia-Alvarado, R.
    López-Callejas, R.
    Mercado-Cabrera, A.
    Peña-Eguiluz, R.
    Rodriguez-Mendez, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402190.pdf
    Data publikacji:
    2015-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    52.77.-j
    52.40.Hf
    81.40.-z
    81.65.-b
    81.65.Mq
    Opis:
    The corrosion enhancement due to plasma post-oxidation subsequent to plasma nitriding of the samples of low alloy annealed steel AISI 4140 was evaluated. The plasma nitriding was carried out at ≈570°C for 1-3 h in an atmosphere of 75% H₂ and 25% N₂. After this process post-oxidation at ≈450°C in a gas mixture, air and dry air-like was conducted for an hour. The treated samples were characterized using the XRD, SEM, AFM, potentiodynamic polarization and Vickers microhardness tests. The outcome of combined processes showed the presence of ε and γ' nitrided phases in the inner compound layer and in the outer one mostly of magnetite phase and barely visible of hematite one without using H₂ in the post-oxidation process. Also in these processes, the corrosion potential proved to be lower in the treated specimens than the untreated ones, and the corrosion current decreased up to one order of magnitude when treated in environment air and air-like ambient.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 5; 824-827
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hiszpańskie "tercios" : 1536-1704
    Spanish Tercios
    Autorzy:
    Notario López, Ignacio José (1969- ).
    Notario López, Iván (1973- ).
    Współwytwórcy:
    Embleton, Gerry A. (1941- ). Ilustracje
    Embleton, Samuel. Ilustracje
    Szadkowski, Paweł. Tłumaczenie
    Firma Handlowo Usługowa NAPOLEON V, Dariusz Marszałek. pbl
    Data publikacji:
    2016
    Wydawca:
    [Oświęcim] : Wydawnictwo Napoleon V
    Tematy:
    Piechota Hiszpania 16-18 w.
    Wojsko Hiszpania 16-18 w.
    Opis:
    Na okł. także logo wydawcy oryg.: Osprey Publishing.
    Miejsce wyd. wg strony internetowej wydawnictwa.
    Tyt. oryg.: The Spanish Tercios (wg BNE online).
    U dołu okł.: ilustracje Gerry & Sam Embleton.
    Bibliogr. s. 48-49. Indeks.
    Dostawca treści:
    Bibliografia CBW
    Książka
    Tytuł:
    Synthesis of SrTiO3 by the Calcination of SrCO3 and TiO2 Mixtures Intensively Ground by Means of High Energy Milling
    Autorzy:
    Rocha-Rangel, Enrique
    Pech-Rodríguez, Wilian J.
    López-Hernández, Juan
    Calles-Arriaga, Carlos A.
    Armendáriz-Mireles, Eddie N.
    Castillo-Robles, José A.
    Rodríguez-García, José A.
    Powiązania:
    https://bibliotekanauki.pl/articles/356247.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    SrTiO3
    mechanochemistry
    insulating ceramics
    perovskite
    Opis:
    A SrTiO3 electroceramic with perovskite structure was produced by the calcination of a mixture of SrCO3 and TiO2 intensively grounded by high energy milling. For this purpose, raw materials were mixed in stoichiometric amounts in a planetary type mill; the obtained powder mixture was calcined for 2 h at temperatures between 800 and 1300°C. Samples resulting from the calcination were characterized by XRD, FTIR, SEM analysis and electrical measurements. From XRD, it was determined that the SrTiO3 formed presents the cubic structure of perovskite. The complete reaction for SrTiO3 compound formation occurs at 1200°C. Micrograph observations indicate the presence of a homogeneous microstructure with tiny grain size. The measured values of electrical resistivity were within the typical range of insulating materials.
    Źródło:
    Archives of Metallurgy and Materials; 2020, 65, 2; 621-626
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Educational models for training in minimally invasive colorectal surgery
    Modele szkoleniowe w chirurgii minimalnie inwazyjnej jelita grubego
    Autorzy:
    Sánchez-Margallo, Francisco M.
    Durán-Rey, David
    González-Portillo, Manuel R.
    López-Agudelo, Isabel
    Sánchez-Margallo, Juan A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1584187.pdf
    Data publikacji:
    2021
    Wydawca:
    Krakowska Akademia im. Andrzeja Frycza Modrzewskiego
    Tematy:
    surgical simulation
    colorectal surgery
    medical training
    minimally invasive techniques
    colorectal cancer
    chirurgia kolorektalna
    szkolenie medyczne
    techniki minimalnie inwazyjne
    rak jelita grubego
    symulacja chirurgiczna
    Opis:
    Colorectal cancer (CRC) is the third most commonly diagnosed malignancy and the fourth most deadly cancer in the world for which surgery is the main treatment. Colorectal surgery can be performed through a wide incision in the abdomen or using minimally invasive surgical (MIS) techniques. Some of these techniques include transanal endoscopic microsurgery (TEM ), transanal minimally invasive surgery (TAMIS), transanal total mesorectal excision (TaTME ), and robot-assisted surgery. Studies increasingly confirm that resections using MIS techniques are safe, oncologically equivalent to open surgery and have better short-term results. These surgical approaches are, however, technically demanding and result in a steep learning curve. The main objective of this study is to review the different MIS techniques for colorectal surgery, as well as the training tools and programs designed to achieve the necessary surgical skills. Different training programs in colorectal surgery have been reported for the different surgical techniques analyzed. Most of these programs are based on training tools in the form of surgical simulators, physical and virtual, as well as the use of experimental and cadaveric models. However, structured training programs in minimally invasive colorectal surgery remain scarce, and there should be a consensus on the fundamental training aspects for the various surgical techniques presented. These training programs should ensure that surgeons acquire sufficient surgical skills to be competent in the development of these surgical techniques, improving the quality of the patient’s surgical outcomes.
    Rak jelita grubego (RJG) jest trzecim co do częstotliwości rozpoznawania nowotworem złośliwym na świecie, a także czwartą przyczyną zgonów na nowotwory złośliwe. Głównym elementem leczenia RJG jest operacja, którą można wykonać przez rozległe nacięcie powłok lub za pomocą technik minimalnie inwazyjnych. Do tych drugich należą: endoskopowa chirurgia transanalna (TEM ), przezodbytowa chirurgia minimalnie inwazyjna (TAMIS), przezodbytowe całkowite wycięcie mezorektum (TaTME ) oraz chirurgia wspomagana robotowo. Analizy danych potwierdzają, że techniki minimalnie inwazyjne są bezpieczne, równie skuteczne onkologicznie co techniki tradycyjne, a także wiążą się z szybszym powrotem chorych do pełnej sprawności. Ich wspólną cechą są niestety wysokie wymagania techniczne oraz długa krzywa uczenia. W artykule omówione zostały różne techniki minimalnie inwazyjne stosowane w leczeniu RJG oraz metody nauczania tych technik. Jak dotąd opracowano wiele sposobów szkolenia dla różnych technik operacyjnych. Większość opiera się na symulatorach chirurgicznych zarówno rzeczywistych, jak i wirtualnych oraz na wykorzystaniu modeli eksperymentalnych i preparatów z ludzkich zwłok. Niestety usystematyzowane modele szkolenia w minimalnie inwazyjnej chirurgii RJG są nadal rzadkością. Widać wyraźnie potrzebę opracowania konsensusu dotyczącego szkolenia w poszczególnych metodach operacyjnych. Tego rodzaju programy powinny zapewnić uczestniczącym w nich chirurgom zdobycie wiedzy pozwalającej na skuteczne wykonywanie zabiegów w celu zapewnienia pacjentom jak najlepszych efektów leczenia.
    Źródło:
    Państwo i Społeczeństwo; 2021, 1; 115-140
    1643-8299
    2451-0858
    Pojawia się w:
    Państwo i Społeczeństwo
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Transiliac Cerclage in Unstable Pelvic Ring Fractures
    Autorzy:
    Sanzana, Edgardo S.
    Ojeda, Alvaro C.
    Gonzalez-Rojas, Francisco
    Lopez-Carcel, Gemma
    Alfaro, Patricio A.
    Melo-Aiello, Humberto
    Powiązania:
    https://bibliotekanauki.pl/articles/28409177.pdf
    Data publikacji:
    2022-07-01
    Wydawca:
    Fundacja Edukacji Medycznej, Promocji Zdrowia, Sztuki i Kultury Ars Medica
    Tematy:
    pelvic ring fractures
    pelvic instability
    internal fixation
    cerclage
    Opis:
    Background. To evaluate the outcomes of transiliac cerclage with Dall-Miles cable in the internal fixation of the posterior complex in unstable pelvic ring fractures between January 1995 and December 2014. Material and methods. A study of 42 men injured at work with an average age of 35.2 years (range, 23 to 61) was conducted. The mechanisms of injury were traffic accidents in 25 cases (59.5%), crushing accidents in 12 cases (28.6%), and fall from height in 5 cases (11.9%). Thirty-six cases were polytraumatized patients (85.7%). The patients were evaluated using Majeed’s functional score and Matta’s radiological criteria. Results. The average follow-up time was 135.8 ± 45.6 months. The clinical outcomes were excellent in 17 cases (40.5%), good in 19 cases (45.2%), fair in 5 cases (11.9%), and poor in 1 case (2.4%). The radiological outcomes were satisfactory in 32 cases (76.2%) and unsatisfactory in 10 cases (23.8%). All fractures were healed. The sequelae were 3 cases (7.2%) of lower limb dysmetria and 3 cases (7.2%) of chronic neuropathic pain. Conclusion. The internal fixation of the sacroiliac complex by Dall-Miles cable cerclage reinforced with small fragment plates should be considered as an alternative method for minimally invasive osteosynthesis in selected cases of unstable pelvic ring fractures.
    Źródło:
    Ortopedia Traumatologia Rehabilitacja; 2022, 24(3); 143-148
    1509-3492
    2084-4336
    Pojawia się w:
    Ortopedia Traumatologia Rehabilitacja
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nitriding of 4140 Annealed Low Alloy Steel in RF Plasma
    Autorzy:
    de la Piedad-Beneitez, A.
    Muñoz-Castro, A.
    Valencia-Alvarado, R.
    López-Callejas, R.
    Mercado-Cabrera, A.
    Peña-Eguiluz, R.
    Rodriguez-Mendez, B.
    Barocio, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1400469.pdf
    Data publikacji:
    2013-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    52.77.Dq
    52.80.Pi
    62.20.Qp
    81.40.Pq
    81.70.Cv
    Opis:
    The annealed low alloy 4140 steel samples have been nitrided for different treatment periods (1-6 h) in an RF inductive plasma discharge with very low bias voltage ( ≈ 400 V). The resulting nitrided layer has been observed by means of an optical microscope whereas the nitride phases have been characterised by X-ray analysis. The corrosion response, assessed by the potentiodynamic tests in the 3.5% NaCl solution, presents both higher noble potential values and lower corrosion rates when compared with the untreated sample. The Vickers microhardness tests values show an appreciable increment compared to that of the untreated sample. The process is characterized by a high overall efficiency because similar average Vickers tests values were obtained, no matter for how long the treatment was extended. Likewise, the scanning electron micrographs confirmed no appreciable size evolution of the compound layer microstructure at different times of treatment.
    Źródło:
    Acta Physica Polonica A; 2013, 123, 5; 904-906
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Participation of interferon type I during canine parvovirus infection
    Autorzy:
    Reyes-Cruz, T.
    Martínez-Gómez, D.
    Verdugo-Rodríguez, A.
    Bustos-Martínez, J.
    López-Islas, J.
    Méndez-Olvera, E.T.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087108.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    canine parvovirus
    antiviral immunity
    IFNβ
    viral pathogenesis
    Źródło:
    Polish Journal of Veterinary Sciences; 2021, 24, 3; 375-384
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of the soil water content on Jatropha seedlings in a tropical climate
    Autorzy:
    Perez-Vazquez, A.
    Hernandez-Salinas, G.
    Avila-Resendiz, C.
    Valdes-Rodriguez, O.A.
    Gallardo-Lopez, F.
    Garcia-Perez, E.
    Ruiz-Rosado, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/25415.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Opis:
    The purpose of this study was to evaluate growth, chlorophyll content, and photosynthesis in Jatropha at different levels of soil moisture. Plants were cultivated in containers and the treatments of the soil water content evaluated were: 0% (without watering), 20, 40, 60, and 80% soil water content. Plant height was statistically similar for all treatments, but the number of leaves differed significantly. Total dry matter and chlorophyll at 40, 60, and 80% soil water content were statistically similar, but different from 0 and 20% soil water content. Leaf area at 40, 60, and 80% soil water content was statistically different from 0 and 20% soil water content. The photosynthetic rate, transpiration and stomatal conductance at 60 and 80% soil water content were statistically similar but different from 0 and 20% soil water content. Water stress affected growth, chlorophyll content, photosynthetic rate, transpiration, and stomatal conductance.
    Źródło:
    International Agrophysics; 2013, 27, 3
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimization of Ultrasound Treatment of Beverage from Mango and Carrot with Added Turmeric Using Response Surface Methodology
    Autorzy:
    Lopez-Martinez, Leticia X.
    Campos-Gonzalez, Nill
    Zamora-Gasga, Victor M.
    Domínguez-Avila, Jesús A.
    Pareek, Sunil
    Villegas-Ochoa, Mónica A.
    Sáyago Ayerdi, Sonia G.
    Gonzalez-Aguilar, Gustavo A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2159268.pdf
    Data publikacji:
    2022-09-05
    Wydawca:
    Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
    Tematy:
    antioxidant capacity
    bioactive compounds
    D-optimal design
    response surface methodology
    ultrasound
    Opis:
    The effect of ultrasound treatment (UT) on a beverage from mango pulp and carrot juice with added turmeric powder on total soluble phenolic content (TSP), total carotenoid content (TC) and antioxidant capacity (AOC) was evaluated. Response surface methodology (RSM) was applied to obtain the optimal formulation of the beverage. The AOC was assigned as a response variable in addition to TSP and TC. Mathematical modeling showed that the formulation with 35% (v/v) of mango pulp, 10% (v/v) of carrot juice, and 0.7% (w/v) of turmeric powder, yielded the highest values of TSP, TC, and AOC. The beverages were subjected to different ultrasound conditions with varying exposure times (ET), sonication amplitudes (SA), and pulse cycles (PC) to obtain the highest values for response variables. Statistical modeling showed that a UT at 21 min ET, 100% SA, and 0.7 s PC, increased TSP, Trolox equivalent antioxidant capacity (TEAC), and ferric reducing antioxidant power (FRAP) by 15.5%, 45.1%, and 15.9%, respectively. Seven phenolic acids, three curcuminoids, five flavonoids, and a xanthonoid were identified in the beverages. The quantities of 3,4-dihydroxybenzoic acid, gallic acid, chlorogenic acids, (+)-catechin, quercetin, kaempferol, (–)-gallocatechin gallate, and mangiferin were higher in the UT beverage compared to the control, suggesting their release from cell-wall structures as a result of UT.
    Źródło:
    Polish Journal of Food and Nutrition Sciences; 2022, 72, 3; 287-296
    1230-0322
    2083-6007
    Pojawia się w:
    Polish Journal of Food and Nutrition Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pre-exposure to faeces or saliva of Triatoma dimidiata decreases parasitemia in mice challenged with Trypanosoma cruzi: a description of the inflammatory reaction at the inoculation site
    Autorzy:
    Monteon, V.
    Quen-Ramirez, E.
    Macedo-Reyes, V.
    Lopez, R.
    Acosta-Viana, K.
    Pennigton, P.
    Ramos-Ligonio, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/6253.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Opis:
    Under natural conditions, Trypanosoma cruzi infection is transmitted to mammals when faeces contaminated with metacyclic trypomastigotes gain access through skin lesions, mucosa or bite wounds. Natural infection of bugs with T. cruzi can vary greatly from less than 1% up to 70%, depending on triatomine species: in the case of Triatoma dimidiata, the percentage of infection is around 30%. In this work uses biological fluids (saliva and faeces) from Triatoma dimidiata to inoculate experimental animals once or multiple times, before inoculation with faeces contaminated with metacyclic trypomastigotes discrete type unit Ia (TcI). The site of infection was analyzed for histological changes based on hematoxile-eosine technique and toluide blue stain for mast cells. Inoculation with saliva led to the recruitment of eosinophils and mononuclear cells at the inoculation site, whereas inoculation with faeces led to the recruitment of neutrophils. Mice inoculated multiple times exhibited a strong inflammatory reaction from the first hour. Mono- or multi-exposure to T. dimidiata fluids before inoculation with metacyclic trypomastigotes helped to control the level of parasitemia. Previous contact with saliva or faeces of T. dimidiata reduces parasitemia in T. cruzi I -infected mice.
    Źródło:
    Annals of Parasitology; 2016, 62, 3
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Morphological and molecular characterization of entomophthorales (Entomophthoromycota: Entomophthoromycotina) from Argentina
    Autorzy:
    Manfrino, Romina G.
    Castrillo, Louela A.
    López Lastra, Claudia C.
    Toledo, Andrea V.
    Ferrari, Walter
    Jansen, Annette B.
    Powiązania:
    https://bibliotekanauki.pl/articles/11543394.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    morphological characteristics
    molecular characteristics
    Entomophthorales
    Entomophthoromycota
    Entomophthoromycotina
    insect pest
    host range
    Argentina
    Opis:
    We characterized 17 insect-pathogenic entomophthoralean fungal isolates (Entomophthoromycotina: Entomophthorales) using morphological and molecular techniques. We identified four species from various insect hosts: (i) Entomophthora planchoniana, six specimens from aphids; (ii) Pandora neoaphidis, three specimens from aphids; (iii) Zoophthora phalloides from an aphid; and (iv) Z. radicans, seven specimens from insects in the orders Diptera, Hemiptera, and Lepidoptera. Analysis of ITS1 data from E. planchoniana showed clustering in accordance to aphid host species. Entomophthora planchoniana from Macrosiphum euphorbiae clustered together, separate from the isolate from Myzus persicae. The P. neoaphidis specimens clustered with sequences from other aphid-pathogenic Pandora species in GenBank. In this study, Z. phalloides from Brevicoryne brassicae and Z. radicans from an unidentified species of Chironomidae (Diptera) in Argentina were characterized for the first time. The present study was initiated to elucidate the taxonomy of the entomophthoralean fungi in Argentina according to their morphological and molecular characters. The presented results emphasize the significance of the combination of molecular data and information on morphology, ecology, and host range for accurate identification of entomophthoralean and allied genera.
    Źródło:
    Acta Mycologica; 2020, 55, 2; 5522
    0001-625X
    2353-074X
    Pojawia się w:
    Acta Mycologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Orchards pruning to energy - the results of the environmental impact assessment of the new logistic chain developed within the EuroPruning project - Part 2
    Gałęzie z sadów na cele energetyczne - wyniki oceny oddziaływania na środowisko nowego łańcucha logistycznego opracowanego w ramach projektu EuroPruning - Cz. 2
    Autorzy:
    Dyjakon, A.
    Boer den, J.
    Garcia-Galindo, D.
    Adamczyk, F.
    Lopez, E.
    Sebastian, F.
    Suardi, A.
    Gebresenbet, G.
    Jirjis, R.
    Bosona, T.
    Germer, S.
    Bischoff, W. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/93472.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Inżynierii Rolniczej
    Tematy:
    pruned biomass
    energetic utilisation
    environmental impact assessment
    biomasa
    gałęzie
    wykorzystanie energetyczne
    ocena oddziaływania na środowisko
    Opis:
    To determine the environmental impact, the assessment of the EuroPruning project strategy has been carried out in accordance with the checking and scooping list related to Directive 97/11/EC. Additionally, some suggestions and recommendations to prevent/minimize the hazard of accidents or negative interaction on surrounding have been elaborated (according to the suggested procedure in ISO 14001 methodology: risk definition and prevention action proposal). As a consequence, the results of the inspection during the demo tests taking place in different orchards/plantations regarding the performance of the machineries operation, farmers’ habits and pruning residues harvesting procedures have been presented, in order to diagnose and determine possible risks that may occur and influence negatively the local environment. Similar activities have been carried out during the storage tests and transportation processes.
    W celu określenia stopnia oddziaływania na środowisko strategii przyjętej w projekcie EuroPruning, polegającej na wykorzystaniu ściętych gałęzi z sadów i plantacji w celach energetycznych, przeprowadzono analizę w oparciu o zasady postępowania zawarte w dyrektywie 97/11/EC. Dodatkowo, w odniesieniu do procedury zawartej w metodologii ISO 14001: definicja ryzyka i proponowane działania prewencyjne, opracowano wskazówki i rekomendacje mające na celu eliminację lub ograniczenie ryzyka wypadku czy negatywnego oddziaływania na otoczenie zewnętrzne. W konsekwencji, przedstawiono wyniki inspekcji dokonanych podczas badań testowych przeprowadzanych w różnych sadach i plantacjach drzew owocowych (obejmujących działanie pracujących maszyn, nawyki sadownika oraz proces zbierania ściętych gałęzi) pod kątem identyfikacji oraz określenia zakresu zagrożeń, które mogą wystąpić i wpływać negatywnie na środowisko. Podobne działania przeprowadzono dla procesu magazynowania i transportu biomasy sadowniczej.
    Źródło:
    Agricultural Engineering; 2018, 22, 1; 37-48
    2083-1587
    Pojawia się w:
    Agricultural Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structure, Morphology and Electrical Properties of CaTiO3 Ceramics Synthesized by the Solid-State Reaction Method
    Autorzy:
    Rocha-Rangel, E.
    López-Hernández, J.
    Castillo-Martínez, J. A.
    Osorio-Ramos, J. J.
    Calles-Arriaga, C. A.
    Estrada-Guel, I.
    Martínez-Sánchez, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/352238.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    CaTiO3
    solid state synthesis
    electrical properties
    insulating ceramics
    Opis:
    In this paper, explain the preparation of CaTiO3 ceramics synthesized by the solid-state reaction method. Calcium carbonate and titanium dioxide were high energy mixed in stoichiometric amounts, and the obtained mixture was calcined at different temperatures (800, 900, 1000 and 1300ºC) for 2h. The obtained samples were characterized by measurement of particle size, Energy Dispersive X-Ray (EDX) Analysis; differential thermal analysis, X-ray diffraction and SEM images. XRD patterns indicated that CaTiO3 ceramics with the structure of perovskite is obtained from calcined powders at 1,300°C for 2h. SEM images show the formation of a very fine and homogeneous morphology. The measured values of electrical resistivity were within the typical range of insulating materials and approach values corresponding to insulating ceramics.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 4; 1749-1753
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Atomic layer deposition as a tool of Surface engineering
    Autorzy:
    Tiznado, H.
    Domínguez, D.
    Borbón-Nuñez, H. A.
    López, J.
    Lizárraga, E.
    Romo-Herrera, J. M.
    Murillo-Bracamontes, E.
    Soto, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1163971.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    ALD
    Nanolaminates
    Surface
    nanotubes
    Opis:
    The applications of nanostructured materials are close related to their shape and properties. A comprehensive understanding of the properties modification by controlling the material size, thickness or shape is of key importance. A nanostructure can become a building block to create the upcoming nano-technological stages, where the final characteristics of devices can be fine-tuned from design. In this report it is shown that several physicochemical properties, such as refractive index, band gap or thermal resistance can be modified in a controlled fashion. ALD is a very versatile fabrication technique for building nanotubes (Al2O3 and TiO2), nanolaminates (Al2O3-ZnO, Y2O3-ZrO2 and ZrO2-TiO2) and core-shell materials (diamond-Al2O3) with an exquisite precision on the thickness of the coatings.
    Źródło:
    World Scientific News; 2018, 108; 99-110
    2392-2192
    Pojawia się w:
    World Scientific News
    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:
    Blood lead determinants and the prevalence of neuropsychiatric symptoms in firearm users in Mexico
    Autorzy:
    Aguilar Madrid, Guadalupe
    Téllez-Cárdenas, Liliana
    Juárez-Pérez, Cuauhtémoc A.
    Haro-García, Luis C.
    Mercado-García, Adriana
    Gopar-Nieto, Rodrigo
    Cabello-López, Alejandro
    Powiązania:
    https://bibliotekanauki.pl/articles/2177065.pdf
    Data publikacji:
    2015-11-12
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    neuropsychiatric symptoms
    occupational exposure
    lead exposure
    blood lead
    firearms
    heavy metal toxicity
    Opis:
    Objectives To identify blood lead predictors and the prevalence of neuropsychiatric symptoms in firearm users of public security in Mexico. Material and Methods A cross-sectional study was performed on 65 males. We obtained socio-occupational data and determined venous blood lead (blood (B), lead (Pb) – BPb), as well as neuropsychiatric symptoms using the Q-16 questionnaire. A multiple linear regression model was constructed to assess determinants of BPb. Results The mean age in the study group was 34.8 years (standard deviation (SD) = 6.9, range: 21–60); the mean number of years spent in the company amounted to 14 years (SD = 8.5, range: 1–48). Twenty percent of the respondents (N = 13) used leaded glazed clay pottery (lead (Pb), glazed (G), and clay pottery (C) – PbGC) in the kitchen. During practice they fired a mean of 72 shots (SD = 60, range: 20–250), and during their whole duration of employment 5483 shots (SD = 8322.5, range: 200–50 000). The mean BPb was 7.6 μg/dl (SD = 6.8, range: 2.7–51.7). Two caretakers from the firing range had 29.6 μg/dl and 51.7 μg/dl BPb. The subjects who had shooting practice sessions ≥ 12 times a year reported a greater percentage of miscarriages in their partners (24% vs. 0%). Twelve percent of the respondents showed an increase in neuropsychiatric symptoms. The BPb multiple linear regression model explained R² = 44.15%, as follows: those who had ≥ 12 practice sessions per year – β = 0.5339 and those who used PbGC – β = 0.3651. Conclusions Using firearms and PbGC contributes to the increased BPb in the studied personnel. The determinants of BPb were: shooting practices >12 times a year and using PbGC. Blood lead concentrations reported in the study, despite being low, are a health risk, as evidenced by the prevalence of neuropsychiatric symptoms.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2016, 29, 2; 219-228
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dual regulation of cytosolic ascorbate peroxide (APX) by tyrosine nitration and S-nitrosylation
    Autorzy:
    Begara-Morales, J.
    Sanchez-Calvo, B.
    Chaki, M.
    Valderrama, R.
    Mata-Perez, C.
    Lopez-Jaramillo, J.
    Carreras, A.
    Padilla, M.
    Corpas, F.
    Barroso, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/80378.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    conference
    post-translational modification
    nitric oxide
    target protein
    ascorbate peroxidase
    tyrosine nitration
    S-nitrosylation
    salinity 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:
    Bioinspired, biomimetic, double-enzymatic mineralization of hydrogels for bone regeneration with calcium carbonate
    Autorzy:
    Lopez-Heredia, M. A.
    Łapa, A.
    Mendes, A. C.
    Balcaen, L.
    Samal, S. K.
    Chai, F.
    Voort, P. van der
    Stevens, C. V.
    Parakhonskiy, B. V.
    Chronakis, I. S.
    Vanhaecke, F.
    Blanchemain, N.
    Pamuła, E.
    Skirtach, A. G.
    Douglas, T. E. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/285532.pdf
    Data publikacji:
    2016
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
    Tematy:
    hydrogels
    bone regeneration
    mineralization
    Źródło:
    Engineering of Biomaterials; 2016, 19, 138; 109
    1429-7248
    Pojawia się w:
    Engineering of Biomaterials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fractal morphology of Beta vulgaris L. cell suspension culture permeabilized with Triton X-100
    Autorzy:
    Arenas-Ocampo, M.
    Alamilla-Beltran, L.
    Vanegas-Espinoza, P.E.
    Camacho-Diaz, B.H.
    Campos-Mendiola, R.
    Gutierrez-Lopez, G.
    Jimenez-Aparicio, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/25018.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    morphology
    Beta vulgaris
    cell suspension culture
    Triton X-100
    morphometry
    cell culture
    chemical agent
    Opis:
    n this work, morphology of Beta vulgaris L. cells permeabilized with 0.7 mM of Triton X-100® was evaluated using digital image processing and concepts of fractal dimension (perimeter- area relations). Important morphometric changes were found when the contact-time with chemical agent was increased.The size of cells decreased, the cells lost the roundness and their shape was more sinuous; this behaviour was a result of a probable shrinkage caused by the excess of exposure with the permeabili- zation agent. Morphology of B. vulgaris cells after permeabili- zation, exhibited a fractal nature since the slope of the ratio of the logarithm of the perimeter vs logarithm of the area was higher than unit. Fractal geometry of the cell morphology was affected as a re- sult of the exposure to Triton X-100®. Those changes can be attri- buted to the loss of turgor and structure of the cell wall.
    Źródło:
    International Agrophysics; 2012, 26, 1
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A field trial of recombinant Schistosoma japonicum paramyosin as a potential vaccine in naturally-infected water buffaloes
    Autorzy:
    Jiz II, M.A.L.
    Mingala, C.N.
    Lopez, I.F.M.
    Chua, M.
    Gabonada Jr., F.G.
    Acosta, L.P.
    Wu, H.
    Kurtis, J.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/6326.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Opis:
    The overall aims of this project are to assess the safety and immunogenicity of the Schistosoma japonicum vaccine paramyosin among water buffaloes residing in endemic areas. The study was conducted in four villages in Leyte, the Philippines, an area highly endemic for schistosomiasis japonica. One hundred and fifteen (N=115) animals provided baseline stool samples for coprologic examination, with preliminary results using FLOTAC showing a 10% prevalence of schistosomiasis. Forty-nine (N=49) animals consented to treatment with 25 mg/kg Praziquantel, and 40, 36 and 32 animals consented to the first, second and third dose of the paramyosin vaccine, respectively. The safety trial involved the first 20 animals and included skin testing, vaccination, anaphylaxis monitoring, as well as hematology and serum chemistry analysis. Skin tests revealed that only three out of 20 animals exhibited redness at the injection site, with none greater than 1 cm. None of the animals exhibited anaphylaxis, and all hematology and serum chemistry markers were within normal range or were similar to pre-vaccination levels. None of the 40 animals administered with the first dose exhibited anaphylaxis, nor any of the subsequent vaccine doses. Immunogenicity assessment of sera collected prior to every vaccination and one month after the last dose showed that the paramyosin vaccine induced robust antibody responses to all animals, as assessed by ELISA. The cytokine levels of whole blood culture supernatants will be further assessed. Our findings demonstrate that the S. japonicum paramyosin vaccine is a safe, well-tolerated and immunogenic treatment among water buffalos residing in endemic areas.
    Źródło:
    Annals of Parasitology; 2016, 62, 4
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Seamless communication for crisis management
    Ponadsystemowa łączność do zarządzania kryzysowego
    Autorzy:
    Wojciechowicz, W.
    Fournier, J.
    Konecny, M.
    Vanya, S.
    Stoodley, J.
    Entwisle, P.
    Hein, D. M.
    Machalek, A.
    Fournaris, A.
    Uriarte, M.
    Lopez, O.
    O'Neill, S.
    Bradl, H.
    Balogh, Z.
    Gatial, E.
    Hluchy, L.
    Mirosław, T.
    Zych, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/298322.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie
    Tematy:
    SECRICOM
    bezszwowa komunikacja
    zarządzanie kryzysowe
    Multi Bearer Router
    MBR
    Push To Talk
    PTT
    SECRICOM Silentel
    Secure Docking Module
    SDM
    Secure Agent Infrastructure
    SAI
    Communication Security Monitoring and Control Centre
    CSMCC
    siódmy program ramowy
    7PR
    Trusted Computing
    seamless communication
    crisis management
    Push To Talk (PTT)
    Seventh Framework Programme
    FP7
    Opis:
    SECRICOM - Seamless Communication for crisis management was a research and development project, realised within the Seventh Framework Programme (7PR). The aim of this project was to develop reference solution based on existing infrastructure, which will be capable to ensure secure and efficient communication for operational crisis management. The project was an answer to the European Security Research Advisory Board (ESRAB) report, in which key requirements for a communication system have been stated. Secure and efficient communication system is a necessity for effective crisis management. It is assumed that such infrastructure may significantly increase rescue actions effectiveness. Currently, however, there are cases when various services (not only domestically but also internationally) use heterogeneous telecommunications systems. It results in the lack of or significant problems with mutual communication. Such situation is often considered problematic and posing a threat to the effective rescue actions. For this purpose, a secure and multi-platform communications system (SECRICOM Silentel) has been developed within SECRICOM project. The Multi Bearer Router (MBR) optimise the backbone network by the use of multiple bearers and dynamic adjustment to various conditions. Advance mechanisms enhancing end-user devices' security - Secure Docking Module (SDM) - have been developed using Trusting Computing principles. Secure Agent Infrastructure (SAI) ensures - based on agents' infrastructure - secure access to distributed data. The system is supplemented with network monitoring platform - Communication Security Monitoring and Control Centre. The SECRICOM project resulted in a communication system prototype, which is capable of ensuring interoperability as well as secure and efficient communication for operational crisis management. This system has been demonstrated on several occasions to the stakeholders.
    SECRICOM - Seamless Communication for crisis management to projekt badawczo-rozwojowy, który został zrealizowany w ramach siódmego programu ramowego (7PR). Celem projektu było wypracowanie bezpiecznej i, co ważne, bazującej na istniejącej infrastrukturze platformy komunikacyjnej do operacyjnego zarządzania kryzysowego. Projekt ten stanowi odpowiedź na raport European Security Research Advisory Board (ESRAB), w którym określono najważniejsze wymagania odnośnie do systemu komunikacji. Bezpieczny i wydajny system komunikacji jest warunkiem koniecznym do efektywnego zarządzania w sytuacjach kryzysowych. Przyjmuje się, że taka platforma jest w stanie znacząco zwiększyć efektywność prac służb ratunkowych. Obecnie jednak są przypadki, gdy służby ratunkowe (nie tylko na arenie międzynarodowej, lecz także podczas działań w jednym kraju) korzystają z niejednorodnych systemów telekomunikacyjnych, co często skutkuje brakiem lub istotnymi problemami z wzajemną łącznością. Sytuacja ta jest postrzegana jako problematyczna i stanowi zagrożenie dla efektywnego działania służb ratunkowych. W ramach projektu SECRICOM opracowano system międzyplatformowej, bezpiecznej łączności SECRICOM Silentel. Za optymalizację transmisji danych (w tym wykorzystanie wielu nośnych oraz dynamiczne dostosowywanie się do warunków) w sieci dystrybucyjnej oraz szkieletowej odpowiada Multi Bearer Router (MBR). Zaawansowane mechanizmy zwiększające bezpieczeństwo urządzeń końcowych - Secure Docking Module (SDM) - opracowano z wykorzystaniem pryncypiów Trusted Computing. Secure Agent Infrastructure (SAI) zapewnia - oparty na infrastrukturze agentów - bezpieczny dostęp do rozproszonych danych. System uzupełnia platforma nadzoru nad siecią - Communication Security Monitoring and Control Centre. Jako rezultat projektu zbudowano oraz kilkukrotnie zademonstrowano prototypową wersję systemu komunikacji. System ten jest zdolny do zapewnienia interoperacyjnej, bezpiecznej i wydajnej łączności w zarządzaniu w sytuacjach kryzysowych.
    Źródło:
    Technical Sciences / University of Warmia and Mazury in Olsztyn; 2012, 15(1); 65-79
    1505-4675
    2083-4527
    Pojawia się w:
    Technical Sciences / University of Warmia and Mazury in Olsztyn
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Phenolic plant extract enrichment of enzymatically mineralized hydrogels
    Autorzy:
    Douglas, Timothy E.L
    Lopez-Heredia, Marco A.
    Pułczyńska, Aleksandra
    Łapa, Agata
    Pietryga, Krzysztof
    Schaubroeck, David
    Santos, Sónia A.O.
    Pais, Adriana
    Brackman, Gilles
    Schamphelaere, Karel de
    Samal, Sangram Keshari
    Keppler, Julia K.
    Bauer, Jonas L
    Chai, Feng
    Blanchemain, Nicolas
    Coenye, Tom
    Pamuła, Elżbieta
    Skirtach, Andre G
    Powiązania:
    https://bibliotekanauki.pl/articles/284057.pdf
    Data publikacji:
    2019
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
    Tematy:
    hydrogel
    mineralization
    polyphenols
    antibacterial
    epigallocatechin gallate
    gellan gum
    Opis:
    Hydrogel mineralization with calcium phosphate (CaP) and antibacterial activity are desirable for applications in bone regeneration. Mineralization with CaP can be induced using the enzyme alkaline phosphatase (ALP), responsible for CaP formation in bone tissue. Incorporation of polyphenols, plant-derived bactericidal molecules, was hypothesized to provide antibacterial activity and enhance ALP-induced mineralization. Three phenolic rich plant extracts from: (i) green tea, rich in epigallocatechin gallate (EGCG) (herafter referred to as EGCG-rich extract); (ii) pine bark and (iii) rosemary were added to gellan gum (GG) hydrogels and subsequently mineralized using ALP. The phenolic composition of the three extracts used were analyzed by ultra-high-performance liquid chromatography coupled to tandem mass spectrometry (UHPLC-MSn). EGCG-rich extract showed the highest content of phenolic compounds and promoted the highest CaP formation as corroborated by dry mass percentage meassurements and ICP-OES de-termination of mass of elemental Ca and P. All three extracts alone exhibited antibacterial activity in the following order EGCG-rich > PI > RO, respectively. However, extract-loaded and mineralized GG hydro-gels did not exhibit appreciable antibacterial activity by diffusion test. In conclusion, only the EGCG-rich extract promotes ALP-mediated mineralization.
    Źródło:
    Engineering of Biomaterials; 2019, 22, 149; 2-9
    1429-7248
    Pojawia się w:
    Engineering of Biomaterials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    From Light to Heavy Nuclear Systems, Production and Decay of Fragments Studied with Powerful Arrays
    Autorzy:
    Casini, G.
    Morelli, L.
    Barlini, S.
    Piantelli, S.
    D'Agostino, M.
    Baiocco, G.
    Marchi, T.
    Abbondanno, U.
    Ademard, G.
    Appannababu, S.
    Bini, M.
    Bonnet, E.
    Borderie, B.
    Bougault, R.
    Bruno, M.
    Chbihi, A.
    Cinausero, M.
    Degerlier, M.
    Fabris, D.
    Frankland, J.
    Gelli, N.
    Gramegna, F.
    Gruyer, D.
    Gulminelli, F.
    Kordyasz, A.
    Kozik, T.
    Kravchuk, V.
    Kulig, P.
    Le Neindre, N.
    Lopez, O.
    Maurenzig, P.
    Olmi, A.
    Pasquali, G.
    Pârlog, M.
    Poggi, G.
    Rivet, M.
    Rosato, E.
    Sosin, Z.
    Spadaccini, G.
    Stefanini, A.
    Twarog, T.
    Valdrè, S.
    Vient, E.
    Raduta, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402639.pdf
    Data publikacji:
    2015-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    25.70.Gh
    25.70.Pq
    25.70.Mn
    29.40.-n
    Opis:
    Reactions between heavy-ions at various energy regimes produce many nuclear fragments which can be populated in highly excited states. The study of these fragments, detected at the end of their particle decay, is important to investigate nuclear forces and structure effects. In recent years there have been many efforts to extend these studies towards the drip-lines, i.e. to systems far from the β-stability valley, by using accelerated radioactive beams. The development of such infrastructures is accompanied by the development of more powerful detectors and associated electronics, capable to identify ions with very different sizes and kinetic energies. Here we give two examples which show how advanced arrays can contribute to the studies on nuclear phenomena. The examples come from the European FAZIA collaboration and from recent campaigns with the GARFIELD apparatus, the latter in operation at the INFN Legnaro Laboratory (Italy) where the SPES RIB facility is under construction.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 5; 1548-1551
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-79 z 79

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