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Wyświetlanie 1-15 z 36
Tytuł:
Galileo Integrity Concept and its Applications to the Maritime Sector
Autorzy:
Hernández, C.
Catalán, C.
Martínez, M. A.
Powiązania:
https://bibliotekanauki.pl/articles/116833.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Global Navigation Satellite System (GNSS)
Galileo
Maritime Sector
Signal-In-Space Accuracy (SISA)
marine navigation
satellite based augmentation system (SBAS)
Galileo Integrity
Signal In Space Monitoring Accuracy (SISMA)
Opis:
Galileo is the European Global Navigation Satellite System, under civilian control. Galileo will provide their users with highly accurate global positioning services and their associated integrity information. The main objective of this article is to explain the basis of the Galileo integrity concept, which is fundamental for safety-critical applications such as maritime navigation. A review of the expected performance that will be achieved has been also included.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2009, 3, 3; 287-291
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the existence of (k,l)-kernels in infinite digraphs: A survey
Autorzy:
Galeana-Sánchez, H.
Hernández-Cruz, C.
Powiązania:
https://bibliotekanauki.pl/articles/30148241.pdf
Data publikacji:
2014-08-01
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
kernel
k-kernel
infinite digraph
(k, l)-kernel
Opis:
Let D be a digraph, V (D) and A(D) will denote the sets of vertices and arcs of D, respectively. A (k, l)-kernel N of D is a k-independent (if u, v ∈ N, u 6= v, then d(u, v), d(v, u) ≥ k) and l-absorbent (if u ∈ V (D) − N then there exists v ∈ N such that d(u, v) ≤ l) set of vertices. A k-kernel is a (k, k −1)-kernel. This work is a survey of results proving sufficient conditions for the existence of (k, l)-kernels in infinite digraphs. Despite all the previous work in this direction was done for (2, 1)-kernels, we present many original results concerning (k, l)-kernels for distinct values of k and l. The original results are sufficient conditions for the existence of (k, l)- kernels in diverse families of infinite digraphs. Among the families that we study are: transitive digraphs, quasi-transitive digraphs, right/left pretransitive digraphs, cyclically k-partite digraphs, κ-strong digraphs, k-transitive digraphs, k-quasi-transitive digraphs.
Źródło:
Discussiones Mathematicae Graph Theory; 2014, 34, 3; 431-466
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetic Properties of GaMnAs Single Layers and GaInMnAs Superlattices Investigated at Low Temperature and High Magnetic Field
Autorzy:
Hernandez, C.
Terki, F.
Charar, S.
Sadowski, J.
Maude, D.
Stanciu, V.
Svedlindh, P.
Powiązania:
https://bibliotekanauki.pl/articles/2036030.pdf
Data publikacji:
2003-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Pp
75.70.-i
Opis:
Magnetotransport properties of GaMnAs single layers and InGaMnAs/InGaAs superlattice structures were investigated at temperatures from 4 K to 300 K and magnetic fields up to 23 T to study the influence of carriers confinement through different structures. Both single layers and superlattice structures show paramagnetic-to-ferromagnetic phase transition. In GaMnAs/InGaAs superlattice beside the Curie temperature (T$\text{}_{c}$≈40 K), a new phase transition is observed close to 13 K.
Źródło:
Acta Physica Polonica A; 2003, 103, 6; 613-619
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermal effects of laser irradiation on maize seeds
Autorzy:
Hernandez Aguilar, C.
Dominguez Pacheco, F.A.
Cruz Orea, A.
Ivanov Tsonchev, R.
Powiązania:
https://bibliotekanauki.pl/articles/26520.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Opis:
It is important to know the temperature changes in seeds that have been irradiated with laser light because this could have substantial practical and theoretical importance. Thus, the thermal effects of low intensity laser irradiation on seeds was studied, showing variation of temperature produced by laser light applied during 60 s on two maize seed genotypes, ‘Toluqueño’ and ‘Cacahuazintle’: crystalline and floury, respectively, under two different conditions: natural colour and dyed black, evaluating the temperature changes by a thermal camera. The optical absorption spectra and the non-radiative relaxation time of the seeds were obtained using photoacoustic spectroscopy. The results indicate that it is possible to produce temperature changes, detected by an infrared camera, in crystalline and floury seeds when theyare irradiated with a laser beam at a 650 nm wavelength and27.4 mW power. The highest variation of temperature in the seeds was obtained for the black-dyed condition, these variations being 5.56 and 9.28°C for crystalline and floury seeds, respectively. Among the seeds, in the dyed condition, the floury seed had the lower non-radiative relaxation time, the higher optical absorption coefficient and a lower optical penetration length at the laser wavelength (650 nm).
Źródło:
International Agrophysics; 2015, 29, 2
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Food delivery based on pso algortihm and google maps
Autorzy:
Soto, Sergio
Bonilla, Edmundo
Portilla, Alberto
Hernández, Jose C.
Atriano, Oscar
Quintero, Perfecto M.
Powiązania:
https://bibliotekanauki.pl/articles/117679.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
TSP
mapy Google
PSO
food delivery
Google maps
dostawa jedzenia
Opis:
This article presents a solution to deal with the optimization of delivery routes problem for a mobile application focused on the restaurant sector, by using a bioinspired algorithm (PSO) to minimize delivery costs, maximize a greater number of deliveries and recommend an optional route for food delivery. Different computational experiments are carried out by using Google Maps (API) for showing the best delivery route. The results obtained are very promising for offering a good delivery service.
Źródło:
Applied Computer Science; 2020, 16, 1; 60-72
1895-3735
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Advanced fleet management systems for public transport
Autorzy:
Hernandez Medel, C.
Martinez Olague, M. A.
Martin Olalla, A.
Garcia Sanz, M. A.
Powiązania:
https://bibliotekanauki.pl/articles/393956.pdf
Data publikacji:
2008
Wydawca:
Polskie Stowarzyszenie Telematyki Transportu
Tematy:
flota
zarządzanie
sterowanie
bezpieczeństwo
transport
telematyka
fleet
management
control
security
telematics
Opis:
The objective of this paper is to present the latest findings and trends in the evolutions of fleet management systems for public transport. The architecture of the current systems will be analysed together with the expected evolutions.
Źródło:
Archives of Transport System Telematics; 2008, 1, 1; 42-46
1899-8208
Pojawia się w:
Archives of Transport System Telematics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application for functionality and registration in the cloud of a microcontroller development board for IoT in AWS
Autorzy:
Pérez, Elizabeth
Araiza, Juan C.
Pozos, Dreysy
Bonilla, Edmundo
Hernández, José C.
Cortes, Jesús A.
Powiązania:
https://bibliotekanauki.pl/articles/1837785.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
AWS
IoT
MQTT
Opis:
The use of the Amazon Web Services cloud enables new functionalities that are not possible with traditional solutions: low latency, local data processing and storage, and direct connectivity to other cloud services. Reimagining the way IoT connectivity services are presented by combining AWS cloud technology with mobile connectivity offers rapid prototyping to help connect devices natively over Wi-Fi. For this, the MQTT communication protocol is used to interact with the IoT device and exchange data, which allows controlling the basic functions of a sensor node. The installation is realized through a software development kit (SDK), which allows the creation of an application for Android devices. This solution gives the option to integrate together, improving the connectivity of the IoT system. The results enable board logging and network configuration, and can also be used to control the IoT device. The embedded firmware provides the required security functions.
Źródło:
Applied Computer Science; 2021, 17, 2; 14-27
1895-3735
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physical characteristics and yield of maize grain in rainfed conditions of high valleys of Mexico
Właściwości fizyczne i plony ziarna kukurydzy w warunkach deszczowego zasilania w wodę w wysokich dolinach Meksyku
Autorzy:
Benitez-Rodriguez, M.G.
Zepeda-Bautista, R.
Hernandez-Aguilar, C.
Virgen-Vergas, J.
Rojas-Martinez, I.
Dominguez-Pacheco, A.
Powiązania:
https://bibliotekanauki.pl/articles/35536.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Opis:
In the High Valleys of Mexico maize is produced with varied yield and quality which sometimes do not meet the parameters established by maize flour milling and nixtamalization industry for making tortilla. Therefore, an evaluation of the yields and quality of the grain of maize hybrids (Zea mays L.) and their relationship with the environment was performed. During the spring-summer cycle 2012, the hybrids HP-1, H-52, H-68, HP-2, H-70, Buho, HP-3, H-57E, H-64, Prospecto-1, H-72 and H-66 were evaluated in Texoloc and Benito Juárez (2240 and 2530 masl), Tlaxcala, Mexico in a design of completely randomised blocks with three replications. Grain yield (GY), thousand grain weight (TGW), hectolitric weight (HW), width (WG), length (LG) and thickness (TG) of grains were measured. The results showed highly significant differences (p = 0.01) between locations, hybrids and the interaction locality x hybrids for physical parameters. Among the localities, Texoloc had 86.59% and 24.32% higher GY and TGW compared to Benito Juarez, respectively, while the HW was slightly lower (73.68 kg hL-1). Average yields of the hybrids were 7.7 t ha-1; HP-2, HP-3, H-57E and H-66 hybrids had yields of more than 8 t ha-1 and the lowest yield was noted for H-70. The hybrids had an average HW of 74.30 kg hL-1; HP-1, H-68, H-70, Buho, HP-3 and H-72 had values > 74 kg hL-1, complying with the provisions of the quality standard NMX-FF034/1-SCFI- 2002 for maize destined for the nixtamalization process. The variation in agroclimatic conditions between the localities affected the yield and physical quality of maize grain.
W Wysokich Dolinach Meksyku produkowana jest kukurydza o zróżnicowanej jakości i poziomie plonowania, która nie zawsze spełnia wymagania przemysłu młynarskiego i nixtamalizacji mąki kukurydzianej do produkcji tortilli. Z tego powodu przeprowadzono badania, mające na celu ocenę plonowania i jakości ziarna hybryd kukurydzy (Zea mays L.) oraz ich zależności od warunków środowiskowych. W sezonie wiosenno-letnim roku 2012 przeprowadzono badania na hybrydach HP-1, H-52, H-68, HP-2, H-70, Buho, HP-3, H-57E, H-64, Prospecto-1, H-72 oraz H-66 w Texoloc i Benito Juárez (2240 i 2530 m n.p.m.), Tlaxcala w Meksyku. Badania przeprowadzono w systemie bloków losowych, w trzech powtórzeniach, dokonując pomiarów plonu ziarna, masy tysiąca ziaren, masy hektolitra ziarna oraz szerokości, długości i grubości ziarna. Stwierdzono istotne różnice (p = 0,01) pomiędzy lokalizacjami, hybrydami oraz interakcjami lokalizacja- hybryda w zakresie parametrów fizycznych ziarna. Wartości plonu i masy 1000 ziaren w Texoloc były wyższe odpowiednio o 86,59% i 24,32% w porównaniu do wartości otrzymanych w Benito Juarez, podczas gdy wartość masa hektolitra była nieznaczenie niższa (73,68 kg·hL-1). Średni plon ziarna hybryd wyniósł 7,7 t·ha-1; plony hybryd HP-2, HP-3, H-57E i H-66 były powyżej 8 t·ha-1, a najniższy plon uzyskano dla hybrydy H-70. Średnia wartość masy hektolitra dla hybryd kukurydzy wyniosła 74,30 kg·hL-1; dla hybryd HP-1, H-68, H-70, Buho, HP-3 i H-72 były > 74 kg·hL-1, spełniając wymagania jakościowe normy NMX-FF034/1-SCFI-2002 dla kukurydzy przeznaczonej do procesu nixtamalizacji. Zróżnicowanie warunków agroklimatycznych pomiędzy badanymi lokalizacjami miało wpływ na plonowanie i charakterystyki fizyczne ziarna kukurydzy.
Źródło:
Acta Agrophysica; 2014, 21, 4
1234-4125
Pojawia się w:
Acta Agrophysica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Laser irradiation effects on field performance of maize seed genotypes
Autorzy:
Hernandez-Aguilar, C.
Dominguez-Pacheco, A.
Cruz-Orez, A.
Ivanov, R.
Carballo-Carballo, A.
Zepeda-Bautista, R.
Galindo Soria, L.
Powiązania:
https://bibliotekanauki.pl/articles/25093.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Źródło:
International Agrophysics; 2009, 23, 4; 327-332
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Changes in masa and tortillas obtained from maize irradiated and nixtamalized with nejayote
Autorzy:
Valderrama-Bravo, C.
Domínguez-Pacheco, F.A.
Hernandez-Aguilar, C.
Sanchez-Hernandez, G.
Perez-Reyes, C.
Contreras-Padilla, M.
Rojas-Gonzalez, T.
Oaxaca-Luna, A.
Powiązania:
https://bibliotekanauki.pl/articles/24252.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Źródło:
International Agrophysics; 2018, 32, 3
0236-8722
Pojawia się w:
International Agrophysics
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:
Reply to Comment on “ Aysheaia prolata from the Utah Wheeler Formation (Drumian, Cambrian) is a frontal appendage of the radiodontan Stanleycaris ” with the formal description of Stanleycaris
Autorzy:
Pates, S.
Daley, A.C.
Ortega-Hernandez, J.
Powiązania:
https://bibliotekanauki.pl/articles/22116.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Opis:
As part of a comprehensive examination of all radiodontans from Cambrian localities in the USA, Pates et al. (2017a, b) and Pates and Daley (2017) revised the taxonomic affinities of several described specimens. This included the reinterpretation of two putative lobopodians, one from the Wheeler Formation (Utah, USA) and one from the Valdemiedes Formation (Spain), as frontal appendages of the radiodontan genera Stanleycaris and Caryosyntrips respectively. In their comment, Gámez Vintaned and Zhuravlev (2018) disagree with these conclusions and raise three topics for discussion: (i) anatomical features they suggest support a lobopodian affinity for “Mureropodia”; (ii) the identity of Caryosyntrips as a radiodontan, and the assignment of certain specimens to this genus; and (iii) the nomenclatural status of Stanleycaris hirpex as an invalid taxon. For (i), we dispute that the anatomical features put forward by Gámez Vintaned and Zhuravlev (2018) are biological and conclude that a lobopodian affinity for Mureropodia is untenable. In response to (ii), we provide further evidence supporting a radiodontan affinity for Caryosyntrips, and those specimens ascribed to this genus. Finally, we concur with (iii) Stanleycaris as an invalid taxon according to the International Code on Zoological Nomenclature (ICZN), and have rectified the situation by providing a valid systematic description.
Źródło:
Acta Palaeontologica Polonica; 2018, 63, 1
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Verifying of the finite element model of the bridge based on the vibration monitoring at differente stages of construction
Autorzy:
Hernandez, W.
Viviescas, A.
Riveros-Jerez, C. A.
Powiązania:
https://bibliotekanauki.pl/articles/230683.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
most segmentowy
identyfikacja modalna
aktualizacja modelu
model elementów skończonych
badanie
drgania otoczenia
segmental bridge
modal identification
model updating
finite element model
testing
ambient vibration
Opis:
This paper presents the results of a dynamic response evaluation of a segmental bridge during two construction stages: before connecting the final segment of the bridge and after connecting the final segment of the bridge but prior to opening the bridge to traffic. The vibration signals obtained from Ambient Vibration Testing (AVT) campaigns were processed in order to obtain the modal parameters of the bridge during the two construction stages. Modal parameters experimentally obtained for the first stage were compared with those obtained from Finite Element (FE) models considering different construction loads scenarios. Finally, modal parameters experimentally obtained for the second stage were used to update its corresponding FE model considering two scenarios, before and after the installation of the asphalt pavement. The results presented in this paper demonstrated that a rigorous construction control is needed in order to effectively calibrate FE models during the construction process of segmental bridges.
Źródło:
Archives of Civil Engineering; 2020, 66, 1; 25-40
1230-2945
Pojawia się w:
Archives of Civil Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aysheaia prolata from the Utah Wheeler Formation (Drumian, Cambrian) is a frontal appendage of the radiodontan Stanleycaris
Autorzy:
PATES, STEPHEN
DALEY, ALLISON C.
ORTEGA-HERNÁNDEZ, JAVIER
Powiązania:
https://bibliotekanauki.pl/articles/945631.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
euarthropoda
radiodonta
hurdiidae
cambrian
united states
Opis:
Aysheaia prolata, was described as the only lobopodian from the Drumian (Cambrian) Wheeler Formation in Utah, USA, and the sole representative of this genus besides the type species Aysheaia pedunculata, from the Cambrian (Stage 5) Stephen Formation, British Columbia. A redescription of Aysheaia prolata reveals previously overlooked morphological features, including segmental boundaries between putative lobopods, and curved terminal spines on the putative anterior end. These observations undermine lobopodian affinities of Aysheaia prolata, and instead we interpret this specimen as an isolated radiodontan frontal appendage. The presence of 11 podomeres, five of which possess elongate and anteriorly recurved ventral blades with auxiliary spines, together with shorter robust dorsal spines, identify the specimen as Stanleycaris. This represents the first report of Stanelycaris outside of the Cambrian Stage 5 thin Stephen Formation in British Columbia, expanding its palaeobiogeographic and stratigraphic range. Aysheaia is left as a monotypic genus endemic to the Burgess Shale. The Spence Shale luolishaniid Acinocrinus stichus is currently the only lobopodian known from the Cambrian of Utah.
Źródło:
Acta Palaeontologica Polonica; 2017, 62, 3; 619-625
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The implications of managerial and leadership styles, and organizational innovation on organizational citizenship behavior
Implikacje zmiennych zarządczych i przywódczych oraz innowacji organizacyjnych dla zachowań obywatelskich w orgnizacji
Autorzy:
Vargas-Hernández, J.G.
Vargas-González, O.C.
Powiązania:
https://bibliotekanauki.pl/articles/31342203.pdf
Data publikacji:
2022
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
leadership style
organization management
organizational citizenship behaviour
citizenship
behaviour
motivation
Źródło:
Acta Scientiarum Polonorum. Oeconomia; 2022, 21, 1; 5-13
1644-0757
Pojawia się w:
Acta Scientiarum Polonorum. Oeconomia
Dostawca treści:
Biblioteka Nauki
Artykuł
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