182 research outputs found
Drone Information Service Requirements for U-Space
No full textThe work presented in this paper is part of the SESAR Horizon 2020 exploratory research project DREAMS, which analyses operational and technical aspects of drone Aeronautical Information Management (AIM) for Europe’s Unmanned Traffic Management system, U-Space. The main objective of DREAMS is to analyse the present and future needs of aeronautical information for future drone flight. The present paper investigates the required information services for achieving safe drone traffic operations in very low altitude airspace. The required drone information services were identified by conducting a comprehensive gap analysis on existing information services from manned aviation and current U-Space service providers in line with drone operator and user requirements. The latter was amalgamated from a comprehensive online survey, an identification of reference scenarios and high-level U-Space services. This research study indicated information gaps in seven key categories: flow management, meteorological, environment, flight, surveillance, communication and drone (vehicle) information. Finally, solutions to bridge these gaps are proposed in this paper.Control & SimulationControl & Operation
Az SES-SESAR rendszer bemutatása, megvalósulásának folyamata Magyarországon
No full textThis paper introduces briefly the essence and the goals of the Single European Sky initiatives and the background and the purpose of the SESAR ATM research. The author reviews some innovative air navigation research already implemented in Hungary.A cikk röviden bemutatja az Egységes Európai Légtér tervezet lényegét, céljait, ismerteti a SESAR kezdeményezésének okait, hátterét. Bemutatja a résztvevőket, az elérendő célokat. Bemutatásra kerülnek a legújabb innovatív léginavigációs fejlesztések, melyek hazánkban már megvalósultak
Az SES-SESAR rendszer bemutatása, megvalósulásának folyamata Magyarországon
No full textThis paper introduces briefly the essence and the goals of the Single European Sky initiatives and the background and the purpose of the SESAR ATM research. The author reviews some innovative air navigation research already implemented in Hungary.A cikk röviden bemutatja az Egységes Európai Légtér tervezet lényegét, céljait, ismerteti a SESAR kezdeményezésének okait, hátterét. Bemutatja a résztvevőket, az elérendő célokat. Bemutatásra kerülnek a legújabb innovatív léginavigációs fejlesztések, melyek hazánkban már megvalósultak
KALENDAR CIJEPLJENJA U PRIMORSKO-GORANSKOJ ŽUPANIJI
No full textTemeljem znanstvenog istraživanja provedenog od strane Hrvatskog zavoda za javno zdravstvo u radu se analiziraju zarazne bolesti djece. Izradom kalendara cijepljenja prikazani su podatci o cijepljenju u Primorsko-goranskoj županiji, i to u razdoblju od 2004. do 2014. godine. Radi preglednosti i lakše usporedbe navedenih podataka Primorsko-goranska županija podijeljena je na pet regija i to otoke, Gorski kotar, Rijeku i okolicu, Opatiju i okolicu i Crikvenicu i Novi Vinodolski. Analizirani su odazivi na cijepljenja i odazivi na sistematske preglede u navedenom razdoblju po navedenim regijama, te su isti prikazani u postotcima tabelarno i grafički. Nadalje, opisane su najzastupljenije zarazne bolesti djece, radi lakšeg razumijevanja uzročnika bolesti, simptoma i liječenja. Također se naglašava bitnost cijepljenja kao jednog od najdjelotvornijih načina spriječavanja epidemija zaraznih bolesti. Ističu se, uz cijepljenje, i druge preventivne mjere kao što su osobna higijena, redoviti sistematski pregledi i sl
Founding of GNSS research in the SESAR deployment phase
No full textThe article presents synthetic approach to the funding of GNSS research in the context of the implementation the last phase of the SESAR program. Author characterized the basic instruments and funds, which companies and research units may use. Their active participation in the EU program is necessary to internationalization the Polish science and technology
Template RR Lyrae Hα, Hβ, and Hγ Velocity Curves
No full textWe present template radial velocity curves of ab-type RR Lyrae stars constructed from high-precision measurements of Hα, Hβ, and Hγ lines. Amplitude correlations between the Balmer line velocity curves, Johnson V band, and Sloan Digital Sky Survey (SDSS) g- and r-band light curves are also derived. Compared to previous methods, these templates and derived correlations reduce the uncertainty in measured systemic (center-of-mass) velocities of RR Lyrae stars by up to 15 km s^(–1), and will be of particular interest to wide-area spectroscopic surveys such as the SDSS and LAMOST Experiment for Galactic Understanding and Exploration
Open Space Searching with a Mobile Robot for the Purpose of Finding Known Objects
No full textOvaj rad daje opis različitih algoritama za pretraživanje prostora i odabir najpovoljnijeg sa stajališta pokrivenosti prostora i brzine pronalaženja objekata. Ovi algoritmi ispitani su u simulacijama za zadani prostor 100x70m. Efikasnost algoritama je također ispitana za druge tipove prostora (drugačija dimenzija i broj objekata). U svrhu samog pretraživanja koristi se mobilni robot Husky kojim se upravlja po globalnom pozicijskom sustavu (GPS). Također je implementiran sustav za zaobilaženje i detekciju objekata u prostoru.This thesis gives a description of the various search algorithms and selection of the most convenient from the point of space coverage and the speed of finding objects. These algorithms were tested in simulations for the given space of 100x70m. Efficiency algorithms have also been tested for other types of space (different dimensions and number of objects). For the purpose of the search itself, a mobile robot Husky is used which is controlled by using the Global Positioning System (GPS). Also, a system for object detection and avoidance is implemented
Performance Analysis of Multi-robot System based on Private Zones
No full textZa razvijeni decentralizirani algoritam upravljanja višerobotskim sustavom koji koristi koncept privatnih zona obavljen je niz eksperimenata u ROS simulacijskom okruženju uz korištenje RVIZ alata za vizualizaciju. Mijenjajući broj vozila i izgled prostora u kojem se roboti gibaju na sustavan način provodimo analizu učinkovitosti ovog upravljanja na način da mjerimo: ukupan broj obavljenih misija u zadanom vremenu , broj misija pojedinih vozila , prosječno trajanje misija , ujednačenost iskorištavanja vozila, broj sklanjanja s puta drugim vozilima i ostalih pokazatelja učinkovitosti upravljačkog algoritma.For a developed decentralized multi-robot management algorithm which uses the concept of private zones, a series of experiments were performed in the ROS simulation environment using the RVIZ visualization tool. Changing the number of vehicles and the layout of the space in which robots are being deployed in a systematic way, we conduct an analysis of the effectiveness of this management in such a way as to measure: total number of missions performed within a given time, number of individual vehicle missions, average duration of missions, uniformity of utilization of the vehicle and other performance algorithm performance indicators
Exploring The Variable Sky With Linear. II. Halo Structure And Substructure Traced By RR Lyrae Stars To 30 kpc
No full textWe present a sample of ∼5000 RR Lyrae stars selected from the recalibrated LINEAR data set and detected at heliocentric distances between 5 kpc and 30 kpc over ∼8000 deg2 of sky. The coordinates and light curve properties, such as period and Oosterhoff type, are made publicly available. We analyze in detail the light curve properties and Galactic distribution of the subset of ∼4000 type ab RR Lyrae (RRab) stars, including a search for new halo substructures and the number density distribution as a function of Oosterhoff type. We find evidence for the Oosterhoff dichotomy among field RR Lyrae stars, with the ratio of the type II and I subsamples of about 1:4, but with a weaker separation than for globular cluster stars. The wide sky coverage and depth of this sample allow unique constraints for the number density distribution of halo RRab stars as a function of galactocentric distance: it can be described as an oblate ellipsoid with an axis ratio q = 0.63 and with either a single or a double power law with a power-law index in the range−2 to−3. Consistent with previous studies, we find that the Oosterhoff type II subsample has a steeper number density profile than the Oosterhoff type I subsample. Using the group-finding algorithm EnLink, we detected seven candidate halo groups, only one of which is statistically spurious. Three of these groups are near globular clusters (M53/NGC 5053, M3, M13), and one is near a known halo substructure (Virgo Stellar Stream); the remaining three groups do not seem to be near any known halo substructures or globular clusters and seem to have a higher ratio of Oosterhoff type II to Oosterhoff type I RRab stars than what is found in the halo. The extended morphology and the position (outside the tidal radius) of some of the groups near globular clusters are suggestive of tidal streams possibly originating from globular clusters. Spectroscopic follow-up of detected halo groups is encouraged
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