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Wyszukujesz frazę "Perez, J. A." wg kryterium: Autor


Tytuł:
The oldest post-Paleozoic (Ladinian, Triassic) brachiopods from the Betic Range, SE Spain
Autorzy:
Baeza-Carratala, J.F.
Perez-Valera, F.
Perez-Valera, J.A.
Powiązania:
https://bibliotekanauki.pl/articles/22178.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Opis:
Triassic brachiopods from the Betic Range were unknown hitherto. Herein we describe the first brachiopod occurrences in the early Ladinian of this domain referable to a new genus and species Misunithyris goyi derived from three localities of the south-Iberian Triassic outcrops. The analysis of internal and external characters of this brachiopod allowed to characterize systematically and biogeographically this fauna in a chronostratigraphic interval when the paucity of brachiopod records is attributable to the entire peri-Iberian epicontinental platform system established in the westernmost Tethyan margin. The new record is endemic to the Betic Range and represents a new faunal constituent of the multicostate zeillerids stock. This fauna inhabited the epicontinental seas of the Sephardic bioprovince since a closer affinity with the low-latitude Tethyan assemblages is revealed. The possible linkage of the Triassic stock with the Early–Middle Jurassic multicostate zeillerid representatives suggests feasible phylogenetic relationships between both groups.
Źródło:
Acta Palaeontologica Polonica; 2018, 63, 1
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Latitude error in compass deviation. Mathematical method to determine the latitude error in magnetic compass deviation
Autorzy:
Basterretxea, I. I.
Vila- Muñoz, J. A.
Perez -Labajos, C. A.
Powiązania:
https://bibliotekanauki.pl/articles/258974.pdf
Data publikacji:
2014
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
optimal exact coefficients
average deviation
latitude error
Opis:
This article aims to provide the seafarer with a tool to calculate the deviation for a righted ship in any geographical position using only the information available on board. In this way the accidental errors in the deviation card are reduced and the latitude error is made negligible. Moreover, an experimental application of this method is carried out on board a tanker to compare the latitude error in different positions at sea.
Źródło:
Polish Maritime Research; 2014, 3; 25-31
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Differential transcriptomic analysis by RNA-seq of GSNO-responsive genes between Arabidopsis roots and leaves
Autorzy:
Begara-Morales, J.
Sanchez-Calvo, B.
Luque, F.
Laterrier, M.
Valderrama, R.
Mata-Perez, C.
Padilla, M.
Carreras, A.
Corpas, F.
Barroso, J.
Powiązania:
https://bibliotekanauki.pl/articles/81065.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
conference
transcriptome
RNA sequence
S-nitrosoglutathione
nitric oxide
stress condition
physiological condition
gene expression
root
leaf
Arabidopsis
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:
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:
Hexagonal Photonic Crystal Fiber Behaviour as a Chromatic Dispersion Compensator of a 40 Gbps Link
Autorzy:
Betancur-Pérez, A. F.
Botero-Cadavid, J. F.
Reyes-Vera, E.
Gómez-Cardona, N.
Powiązania:
https://bibliotekanauki.pl/articles/226794.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
BER
chromatic dispersion
DWDM
photonic crystal fibers
vector finite element method
Opis:
In this paper, the capabilities of chromatic dispersion compensation of a photonic crystal fiber with a hexagonal distribution of circular air holes was investigated. The vector finite element method with scattering boundary condition was used to analyze a set of configurations of the fiber in which the distance between air holes’ centers was modified. With this method it was possible to obtain the values of chromatic dispersion and confinement factor in the C fiber band. The best suited configurations were tested in a 160 km optical link with a bit rate of 40 Gbps. The performance was evaluated by measuring the bit error rate for a set of 20 channels with channel spacing of 100 GHz. T e simulation results showed that is possible to reach values of hromatic dispersion as low as −850 ps/nm⋅km, confinement losses close to 10⁻³ dB/km and good BER results in the order of 10⁻¹⁷ for a wavelength of 1550 nm.
Źródło:
International Journal of Electronics and Telecommunications; 2017, 63, 1; 93-98
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Importance of the ore veins to study, to interpret and to protect the mining heritage
Znaczenie żył rudnych dla studiowania, interpretacji i ochrony dziedzictwa górniczego
Autorzy:
Dueñas Molina, J.
Lorenc, M. W.
Molina Vega, A.
Molina Molina, F.
Liébanas, J. S.
Pérez Sánchez, A. A.
Powiązania:
https://bibliotekanauki.pl/articles/122205.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa
Tematy:
mining heritage
legal protection
cultural landscape
working methodology
dziedzictwo górnicze
ochrona prawna
krajobraz kulturowy
metodologia pracy
Opis:
Four thousand years of mining activity shaped a singular cultural landscape in the Linares-La Carolina district. The geological richness of the area attracted the main civilizations from different eras. Argarians, Romans, Carthaginians, as well as mining companies from Great Britain, Germany, France and Belgium during the industrial period, established their installations working the rich veins of copper and galena. In 2002 the Cultural authorities of the Andalusia Board entrusted the Colectivo Proyecto Arrayanes with a research to identify the most significant remains. The result of our work was the documentation for the inscription of 65 mining and metallurgy sites in the Andalusia Historic Heritage List. Later, we extended the work to a second record including 60 more sites, belonging to all municipalities of the mining district. Currently, our association is developing a project to obtain the certification of the ancien mining district as Heritage Area, a new legal body of the Historical Heritage Law published in Andalucía in 2007. This could provide better protection for the main part of the mining sites and remains in the district, including the archaeological sites. The declaration will allow the management of the territory to became a Cultural Park. Our research establish 16 sectors, extended over eight municipalities. Each sector is related to one or several veins, and includes mining sites, archaeological sites and remains related to metallurgy, ore dressing or railway installations. And each site is described in a registry card. We have catalogued more than 580 sites. Around 150 of them have evidences of the presence of Cornish technology. The Cultural Landscape as axle of future developments and the veins are the real order of the mining territory. Industrial and mining remains, roads, railway lines, etc, are placed in relation with the orientation of the veins. These are the main guidelines of the Working Methodology we are developing to complete this ambitious project.
Cztery tysiące lat działalności górniczej ukształtowało na obszarze Linares-La Carolina swoisty krajobraz kulturowy. Geologiczne bogactwo tego obszaru interesowało główne cywilizacje wszystkich epok. Argarianie, Rzymianie, Kartagińczycy, podobnie jak później wielkie kompanie górnicze z Wielkiej Brytanii, Niemiec, Francji i Belgii w okresie przemysłowym, wszyscy wznosili swoje zakłady pracujące funkcjonujące na bogatych żyłach miedzi i ołowiu. W 2002 r. władze ds. kultury Zarządu Andaluzji powierzyły stowarzyszeniu Colectivo Proyecto Arrayanes wykonanie inwentaryzacji najważniejszych pozostałości górniczych. Rezultatem wykonanej pracy była dokumentacja obejmująca 65 stanowisk górniczych i hutniczych z Listy Andaluzyjskiego Dziedzictwa Historycznego. Później badania poszerzono o drugi zapis kolejnych 60 stanowisk, należących do wszystkich gmin tego górniczego obszaru. Obecnie Stowarzyszenie opracowuje projekt mający na celu deklarację tego dawnego rejonu górniczego jako Obszar Dziedzictwa, nową postać prawną Dziedzictwa Historycznego stworzoną w Andaluzji w 2007 r. Mogłoby to zapewnić lepszy poziom ochrony głównej części terenów górniczych, ale też pozostałego obszaru, w tym stanowisk archeologicznych. Deklaracja taka umożliwiłaby zarządzanie tym terytorium jako Parkiem Kultury. Przedstawiona propozycja ustanawia 16 obszarów, poszerzonych o osiem gmin. Każdy obszar związany jest z jedną lub kilkoma żyłami rudnymi i obejmuje stanowiska górnicze, archeologiczne oraz pozostałości związane z metalurgią, przeróbką rudy i obiekty kolejowe. Każde stanowisko opisane jest w formie oddzielnej karty kartoteki rejestru. Stworzony katalog obejmuje ponad 560 stanowisk, z których około 150 posiada dowody wykorzystywania technologii kornwalijskiej. Krajobraz kulturowy oraz rudne żyły stanowią oś przyszłego rozwoju terytorium górniczego. Pozostałości przemysłowe i górnicze, drogi, linie kolejowe itp., są umieszczone w stosunku do orientacji żyły. Właśnie one są głównymi wytycznymi do stworzenia roboczej metodologii, opracowywanej w celu ukończenia tego ambitnego projektu.
Źródło:
Hereditas Minariorum; 2018, 5; 33-50
2391-9450
2450-4114
Pojawia się w:
Hereditas Minariorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamism patterns of western Mediterranean cruise ports and the coopetition relationships between major cruise ports
Autorzy:
Esteve-Perez, J.
Garcia-Sanchez, A.
Powiązania:
https://bibliotekanauki.pl/articles/258786.pdf
Data publikacji:
2018
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
cruise ports
Mediterranean ports
hierarchic patterns
coopetition
shift-share analysis
Opis:
The Mediterranean Sea has seen an increase of ports hosting cruise ships during the first fifteen years of the 21st century. The increase in cruise ship presence in Mediterranean ports is associated with the dynamism of cruise traffic in recent years, with an average annual growth of 7.45% for cruise passengers worldwide during the period of 1990-2015. Cruise traffic is a maritime business that is primarily composed of two elements, maritime affairs and tourism. This article focuses on the maritime component. With the growth of the cruise industry, cruise lines have been forced to seek new ports to meet demand in an attempt to create differentiated products based on the ports that compose the itinerary. The itinerary system of cruise traffic makes the cruise ports depend on one another to design an itinerary. This feature results in both complex geographic relationships in the design of a cruise itinerary and complex competitive/cooperative relationships between ports. The aim of this article is to present the hierarchic picture of a sample of 29 cruise ports in the Western Mediterranean region during the period of 2000-2015. To achieve this goal, a port size classification is proposed and a shift-share analysis at the inter- and intra-group size level is applied. Moreover, concentration measures are used to determine the changes in the levels of market concentration. Furthermore, a dynamic model is proposed to determine the competitive or cooperative relationships between cruise ports. The proposed model is applied to the largest ports with data from the 2001-2015 period.
Źródło:
Polish Maritime Research; 2018, 1; 51-60
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Body mass estimation in amphicyonid carnivoran mammals: A multiple regression approach from the skull and skeleton
Autorzy:
Figueirido, B.
Perez-Claros, J.A.
Hunt, R.M.Jr.
Palmqvist, P.
Powiązania:
https://bibliotekanauki.pl/articles/21366.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
body mass
estimation
amphicyonid
mammal
skull
skeleton
Mammalia
Carnivora
Amphicyonidae
multiple regression
paleontology
Opis:
The body masses of sixteen species of amphicyonids (Mammalia, Carnivora, Amphicyonidae) from the New and Old World were estimated on the basis of 86 osteological variables measured from the craniodental (N = 44) and postcranial (N = 42) skeleton of living species of Canidae and Ursidae. Given the absence of complete and well preserved skeletons of amphicyonids in the fossil record, multiple regression functions were derived separately from measurements taken from the mandible, the cranium and the major limb bones. The accuracy of the regression functions was evaluated using the percentage prediction error and the percentage standard error of the estimates. Mass values were calculated with these equations using measurements taken in adult individuals from a number of daphoenine and amphicyonine species. Results obtained show that three distinct size classes of amphicyonids emerged through the evolutionary history of the “beardog” family and that these size classes correlate with presumably different ecomorphs. Quantitative estimates of body size of amphicyonids are critical for deciphering the paleobiology of this poorly understood family of large fissiped carnivorans and can be used for placing it within a broader ecological context.
Źródło:
Acta Palaeontologica Polonica; 2011, 56, 2
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Secondary electron interactions in materials with environmental and radiological interest
Autorzy:
García, G.
Blanco, F.
de Pablos, J.
Pérez, J.
Williart, A.
Powiązania:
https://bibliotekanauki.pl/articles/148529.pdf
Data publikacji:
2003
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
electron scattering
energy deposition
Opis:
Important environmental and radiological applications require energy deposition models including the interactions between the secondary electrons and the atoms or molecules of the medium. In this work we propose a method to obtain reliable cross-section data to be used in these models by combining total and ionisation cross-section measurements with simple calculations of the differential and integral elastic cross sections. The energy loss spectra obtained in this experiment have been also used to derive the stopping power of the considered materials for electrons. Some examples of results for atomic (Xe) and molecular (CF4) targets are presented and discussed in this paper.
Źródło:
Nukleonika; 2003, 48, 2; 103-107
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical and Physical Parametric Analysis of a SEN with Flow Conditioners in Slab Continuous Casting Mold
Autorzy:
Gonzalez-Trejo, J.
Real-Ramirez, C. A.
Miranda-Tello, R.
Rivera-Perez, F.
Cervantes-de-la-Torre, F.
Powiązania:
https://bibliotekanauki.pl/articles/351515.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
submerged entry nozzle
fluid-flow modifiers
continuous casting of steel
mold flow patterns
turbulence
Opis:
Some of the most recent technologies that improves the performance in continuous casting process has installed infrastructure outside the mold to modify the natural fluid flow pattern to obtain a quasi-steady condition and promote a uniform solidified shell of steel. The submerged entry nozzle distributes the liquid steel in the mold and can be used to obtain the flow symmetry condition with external geometry improvements. The fluid flow conditioners were located near the outlet ports of the nozzle. The aim of the modifiers is to impose a pseudo symmetric pattern in the upper zone of the mold by inhibiting the fluid exchange between the zones created by conditioners. This work evaluates the effect of the thickness and length of the fluid-flow modifiers on the overall performance of the submerged nozzle. These properties of the fluid-flow modifiers were normalized based on two of the geometric dimensions of the standard equipment. Numerical and physical simulations suggest that the flow modifier should be as thin as possible.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 2A; 927-946
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Acoustic Scattering of 3D Complex Systems Having Random Rough Surfaces by Scalar Integral Equations
Autorzy:
Guel-Tapia, J. A.
Villa-Villa, F.
Mendoza-Suárez, A.
Pérez-Aguilar, H.
Powiązania:
https://bibliotekanauki.pl/articles/178120.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
integral equations
Helmholtz equation
acoustic scattering
Opis:
We propose a numerical surface integral method to study complex acoustic systems, for interior and exterior problems. The method is based on a parametric representation in terms of the arc’s lengths in curvilinear orthogonal coordinates. With this method, any geometry that involves quadric or higher order surfaces, irregular objects or even randomly rough surfaces can be considered. In order to validate the method, the modes in cubic, spherical and cylindrical cavities are calculated and compared to analytical results, which produced very good agreement. In addition, as examples, we calculated the scattering in the far field and the near field by an acoustic sphere and a cylindrical structure with a rough cross-section.
Źródło:
Archives of Acoustics; 2016, 41, 3; 461-472
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Flotacja jonowa cynku z rozcieńczonych kwaśnych roztworów wodnych
Zinc ion flotation from diluted aqueous acid solutions
Autorzy:
Kawalec-Pietrenko, B.
Konopacka-Łyskawa, D.
Rybarczyk, P.
Perez, J.
Perez, A.
Powiązania:
https://bibliotekanauki.pl/articles/2070837.pdf
Data publikacji:
2009
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
flotacja jonowa
cynk
prędkość powietrza
stężenie substancji powierzchniowo-czynnej
ion floation
zinc
air flow rate
surfactant concentration
Opis:
Usuwano jony cynku z modelowych roztworów o pH = 5 w procesie separacji pianowej. Wyznaczono zmiany stopnia wyflotowania i współczynnika wzbogacenia w zależności od prędkości przepływu powietrza oraz stężenia siarczanu dodecylosodowego jako surfaktantu anionowego.
Zinc ions were removed from model solutions of pH = 5 by foam separation process. Values of removal ratio and the enrichment coefficient were determined in a form of dependence of gas velocity and n-dodecyl sodium sulfate concentration as anionie surfactant.
Źródło:
Inżynieria i Aparatura Chemiczna; 2009, 6; 102-103
0368-0827
Pojawia się w:
Inżynieria i Aparatura Chemiczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
DVB-T Channels Measurements for the Deployment of Outdoor REM Databases
Autorzy:
Kliks, A.
Kryszkiewicz, P.
Cichoń, K.
Umbert, A.
Perez-Romero, J.
Casadevall, F.
Powiązania:
https://bibliotekanauki.pl/articles/307830.pdf
Data publikacji:
2014
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
channel measurements
DVB-T
spectrum occupancy
Radio Environment Maps
Opis:
In this paper the analysis of the spectrum occupancy in the TV band is provided based on the outdoor measurements campaigns carried out in Poznań, Poland in 2013 and 2014. The goal of this work is to discuss the stability and other important features of the observed spectrum occupancy in the context of outdoor Radio Environment Maps database deployment. Reliable deployment of these databases seems to be one of the critical points in practical utilization of the TV White Spaces for cognitive purposes inside buildings and in densely populated cities. The results obtained for outdoor scenario are briefly compared with the previous measurements conducted indoors in Barcelona, Spain, and in Poznań, Poland.
Źródło:
Journal of Telecommunications and Information Technology; 2014, 3; 42-52
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
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:
Influence of machining of EN-GJL-250 and EN-GJS-400 cast irons on tribological behavior
Autorzy:
Martinez, J.
Pereira, A.
Perez, J. A.
Mathia, T.
Powiązania:
https://bibliotekanauki.pl/articles/94140.pdf
Data publikacji:
2015
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
tribological behavior
grey cast iron
spheroidal graphite cast iron
friction
surface wear
Opis:
In transport and, particularly in the case of the present study, naval industries, one of the major objectives of research on wear and friction is focused principally on solid lubrication. In the following paper, the tribological behaviors of two well-known, different cast irons, lamellar grey iron (EN-GJL-250) and spheroidal graphite ductile iron (EN-GJS-400), are compared and the results are analyzed. For each material's family, the surfaces’ properties are characterized at different stages of the machining process. The particular influence of diverse feed rates in a turning facing is evaluated. Moreover, some tests of the laser cladding process, which contribute to the improvement of superficial properties, are carried out; therefore, the initial morphology before surface treatment is carefully characterized and evaluated in the context of subsequent adhesion qualification. The final goal of the study is to deliver feasible initial information concerning two similar cast irons that are traditionally used in the naval industry, which would be manufactured and employed in the future as dry lubricated bearings
Źródło:
Archives of Mechanical Technology and Materials; 2015, 35; 12-22
2450-9469
Pojawia się w:
Archives of Mechanical Technology and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł

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