Methodological aspects of automatic pilot flight assessment system

This article deals with the various aspects of automatic pilot flight assessment system methods. Different types of flight corridors are examined: circling, left and right superelevation drawing (number eight), and others. The advantages and disadvantages of each of them are discussed. Limit line calculations of the corridor turns are presented. The aim is to develop new flight assessment methods

Automatizuota orlaivio pilotavimo vertinimo sistema

Skrydžio sauga – vienas svarbiausių oro transporto sistemos uždavinių. Pagrindinis veiksnys užtikrinant skrydžių saugą – žmogiškasis faktorius. Vienas iš svarbiausių orlaivio piloto kvalifikacijos rodiklių – gebėjimas tiksliai pilotuoti oro erdvėje. Skrydžio trajektorijai fiksuoti ir jos atitikimui nurodytam maršrutui vertinti ir vertinimo rezultatams pateikti atliekant skrydžio analizę reikalinga automatizuota orlaivio pilotavimo vertinimo sistema. Disertacijoje nagrinėjamos oro transporto skrydžių vertinimo problemos, taikant palydovinės navigacijos ir kompiuterines duomenų apdorojimo ir rodymo priemones, kurios padėtų pagerinti vertinimo objektyvumą. Pagrindiniai tyrimo objektai yra skrydžių duomenų vaizdavimas ir vertinimas. Jų detali analizė ir interpretacija leidžia sudaryti tinkamus skrydžio vertinimo modelius. Pagrindinis disertacijos tikslas – sukurti automatizuoto skrydžio tikslumo vertinimo metodiką, kuri, kartu su techninėmis priemonėmis, geba įrašyti orlaivio skrydžio trajektoriją ir nustatyti jos nuokrypius nuo nurodytos skrydžio tunelio ašies. Sukurtų priemonių taikymo sritis – orlaivių pilotų praktinių skrydžių tikslumo analizė bei jų vertinimas. Darbe sprendžiami keli pagrindiniai uždaviniai: kuriama automatizuota skrydžio tunelių modeliavimu grindžiama orlaivio pilotavimo tikslumo vertinimo sistemos veikimo metodika, sudaromi tunelių principu pagrįsti matematiniai/programiniai piloto skrydžio vertinimo modeliai bei analizuojami eksperimentinių skrydžių ir piloto skrydžio vertinimo tunelių matematinio modeliavimo rezultatai. Disertaciją sudaro įvadas, trys skyriai, bendrosios išvados, naudotos literatūros ir autoriaus publikacijų disertacijos tema sąrašai ir aštuoni priedai. Pirmajame skyriuje pateikiama vertinimo sistemos prielaidas, skrydžio vykdymo eigą, piloto skrydžio vertinimui keliamus reikalavimus bei piloto skrydžio vertinimo metodus nagrinėjančios literatūros analizė. Antrajame skyriuje aptariami sukurti programiniai piloto skrydžio vertinimo modeliai, leidžiantys, pagal pasirinktus parametrus, automatizuotai sudaryti skrydžio vertinimo tunelius, kurie padeda nustatyti orlaivio pilotų skrydžio nuokrypius nuo nurodytos trajektorijos. Trečiajame skyriuje nustatant tarpusavio atitikimą, veiksmingumą bei tikslumą yra analizuojami eksperimentinių skrydžių ir matematinio modeliavimo rezultatai. Disertacijos tema paskelbti 7 straipsniai: vienas – straipsnių rinkinyje, įtrauktame į Thomson ISI sąrašą, vienas – konferencijos medžiagoje, referuotoje Thomson ISI duomenų bazėje, trys – recenzuojamose tarptautinių konferencijos medžiagose bei du – respublikinių konferencijų medžiagose. Disertacijos tema perskaityti 6 pranešimai Lietuvos bei kitų šalių konferencijose

Automatic assessment methods of A pilot‘s flight in the traffic circuit

With an increasing number of aircraft, navigation requirements and fast development of avionics systems, as well as the need for the integration of UAVs into airspace, pilots are facing new challenges that need to be mitigated by the development of additional training and assessment systems. These measures would both assess and encourage student pilots to improve their performance by using predetermined flight accuracy requirements based on established flight corridors. In this paper, automatic assessment methods to be used for pilot flight assessment while flying in the circuit are analysed

Review of equipment of flight analysis and development of interactive aeronautical chart using Google Earth’s software

While carrying out pilot-student flight analysis, it was observed that there is a scarcity of means designed to allow fast and convenient analysis and evaluation of pilot-student flights in airspace. Most of the free navigation tools available are more adapted for on-ground navigation analysis (height and vertical speed information are not always displayed). Various software programmes can display different flight information; however, it is difficult to relate the different data parameters and compare them. Thus, the aim of the study is to resolve these problems by offering to pilots-instructors a convenient interactive aeronautical chart. First published online 02 May 201

Association between Pseudonocardia symbionts and Atta leaf-cutting ants suggested by improved isolation methods

Fungus-growing ants associate with multiple symbiotic microbes, including Actinobacteria for production of antibiotics.The best studied of these bacteria are within the genus Pseudonocardia, which in most fungus-growing ants are conspicuouslyvisible on the external cuticle of workers. However, given that fungus-growing ants in the genus Atta do not carry visibleActinobacteria on their cuticle, it is unclear if this genus engages in the symbiosis with Pseudonocardia. Here we explore whetherimproving culturing techniques can allow for successful isolation of Pseudonocardia from Atta cephalotes leaf-cutting ants. Weobtained Pseudonocardia from 9 of 11 isolation method/colony component combinations from all 5 colonies intensively sampled.The most efficient technique was bead-beating workers in phosphate buffer solution, then plating the suspension on carboxymethylcellulosemedium. Placing these strains in a fungus-growing ant-associated Pseudonocardia phylogeny revealed that while somestrains grouped with clades of Pseudonocardia associated with other genera of fungus-growing ants, a large portion of the isolatesfell into two novel phylogenetic clades previously not identified from this ant-microbe symbiosis. Our findings suggest thatPseudonocardia may be associated with Atta fungus-growing ants, potentially internalized, and that localizing the symbiont andexploring its role is necessary to shed further light on the association. [Int Microbiol 2013; 16(1):17-25

Escovopsis trichodermoides sp. nov., isolated from a nest of the lower attine ant Mycocepurus goeldii

Currently, five species are formally described in Escovopsis, a specialized mycoparasitic genus of fungus gardens of attine ants (Hymenoptera: Formicidae: tribe Attini). Four species were isolated from leaf-cutting ants in Brazil, including Escovopsis moelleri and Escovopsis microspora from nests of Acromyrmex subterraneus molestans, Escovopsis weberi from a nest of Atta sp. and Escovopsis lentecrescens from a nest of Acromyrmex subterraneus subterraneus. The fifth species, Escovopsis aspergilloides was isolated from a nest of the higher attine ant Trachymyrmex ruthae from Trinidad. Here, we describe a new species, Escovopsis trichodermoides isolated from a fungus garden of the lower attine ant Mycocepurus goeldii, which differs from the five other species by highly branched, trichoderma-like conidiophores lacking swollen vesicles, with reduced conidiogenous cells and distinctive conidia morphology. Phylogenetic analyses based on partial tef1 gene sequences support the distinctiveness of this species. A portion of the internal transcribed spacers of the nuclear rDNA was sequenced to serve as a DNA barcode. Future molecular and morphological studies in this group of fungi will certainly unravel the taxonomic diversity of Escovopsis associated with fungus-growing ants.Instituto de Botánica "Dr. Carlos Spegazzini

Anomalous Purcell decay of strongly driven inhomogeneous emitters coupled to a cavity

We perform resonant fluorescence lifetime measurements on a nanocavity-coupled erbium ensemble as a function of cavity-laser detuning and pump power. Our measurements reveal an anomalous suppression of the ensemble decay lifetime at zero cavity detuning and high pump fluence. We capture qualitative aspects of this decay rate suppression using a Tavis-Cummings model of non-interacting spins coupled to a common cavity.Comment: 4 figure

Escovopsis trichodermoides sp. nov., isolated from a nest of the lower attine ant Mycocepurus goeldii

Currently, five species are formally described in Escovopsis, a specialized mycoparasitic genus of fungus gardens of attine ants (Hymenoptera: Formicidae: tribe Attini). Four species were isolated from leaf-cutting ants in Brazil, including Escovopsis moelleri and Escovopsis microspora from nests of Acromyrmex subterraneus molestans, Escovopsis weberi from a nest of Atta sp. and Escovopsis lentecrescens from a nest of Acromyrmex subterraneus subterraneus. The fifth species, Escovopsis aspergilloides was isolated from a nest of the higher attine ant Trachymyrmex ruthae from Trinidad. Here, we describe a new species, Escovopsis trichodermoides isolated from a fungus garden of the lower attine ant Mycocepurus goeldii, which differs from the five other species by highly branched, trichoderma-like conidiophores lacking swollen vesicles, with reduced conidiogenous cells and distinctive conidia morphology. Phylogenetic analyses based on partial tef1 gene sequences support the distinctiveness of this species. A portion of the internal transcribed spacers of the nuclear rDNA was sequenced to serve as a DNA barcode. Future molecular and morphological studies in this group of fungi will certainly unravel the taxonomic diversity of Escovopsis associated with fungus-growing ants.la fecha de publicacion corresponde a la primera versión on line del manuscrit

Nanocavity-mediated Purcell enhancement of Er in TiO2_2 thin films grown via atomic layer deposition

The use of trivalent erbium (Er$^{3+}$), typically embedded as an atomic defect in the solid-state, has widespread adoption as a dopant in telecommunications devices and shows promise as a spin-based quantum memory for quantum communication. In particular, its natural telecom C-band optical transition and spin-photon interface makes it an ideal candidate for integration into existing optical fiber networks without the need for quantum frequency conversion. However, successful scaling requires a host material with few intrinsic nuclear spins, compatibility with semiconductor foundry processes, and straightforward integration with silicon photonics. Here, we present Er-doped titanium dioxide (TiO$_2$) thin film growth on silicon substrates using a foundry-scalable atomic layer deposition process with a wide range of doping control over the Er concentration. Even though the as-grown films are amorphous, after oxygen annealing they exhibit relatively large crystalline grains, and the embedded Er ions exhibit the characteristic optical emission spectrum from anatase TiO$_2$. Critically, this growth and annealing process maintains the low surface roughness required for nanophotonic integration. Finally, we interface Er ensembles with high quality factor Si nanophotonic cavities via evanescent coupling and demonstrate a large Purcell enhancement (300) of their optical lifetime. Our findings demonstrate a low-temperature, non-destructive, and substrate-independent process for integrating Er-doped materials with silicon photonics. At high doping densities this platform can enable integrated photonic components such as on-chip amplifiers and lasers, while dilute concentrations can realize single ion quantum memories.Comment: 5 figure