Navegando por Assunto "Playback"

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Acesso aberto (Open Access)
Desenvolvimento de uma ferramenta computacional para otimização de cálculo luminotécnico de interiores baseado em algoritmo genético
(Universidade Federal do Pará, 2019-09-17) MONTEIRO, Ana Laura Pinheiro Ruivo; TOSTES, Maria Emília de Lima; http://lattes.cnpq.br/4197618044519148
There is a large quantity of lamps and luminaires that present their on characteristics, such as the amount oflumens and life time. Thus, there are several possible combinations of lamps and luminaires that can be employed as a solution to adapt the lighting of a given indoor environment. What will differentia teach solution will be the cost of investment and the time of financial return. This work presents the development of a tool that provides the user with the possibility to carry out lighting studies for any internal business environment ,considering multiple scenarios and following the regulations set by the NBRISO/CIE 8995-1:2013. Studies are carried out in an optimized method by running a genetic algorithm, which has as objective function the minimization of time of financial return on investment of lamps and luminaires,which are necessary for the achievement of illuminance area. For the development of the tool spread sheets were associated with the Python programming language and the PyCharm as the development software. The lumens method was used for lighting sizing, the simple linear regression technique was used to estimate the rate of electrical power for a period of 10 years and NetPresent Value a long side the discounted pay back for analysis of financial return of the solutions generated by the tool. The developed tool was applied in four different scenarios in the Amazon Energy Efficiency Center(CEAMAZON) building. Valid solutions for all scenarios were found, that is, a pay back with in 10 years, taking into consideration the initial investment, annual consumption and maintenance,if any. The best solutions were simulated by the software DIALux as an aid in the projection of the distribution of luminaires in environments. The aspects described in this work show the functionality and applicability of this tool, in order to support the user in the planning of lighting projects, having achieved the established goal, showing functionality and effective ness.
Acesso aberto (Open Access)
Duetos na Amazônia: análise da sintaxe do canto em dueto do gênero Thryothorus (Aves, Troglodytidae)
(Universidade Federal do Pará, 2012-03-06) MONTE, Amanda de Almeida; SILVA, Maria Luisa da; http://lattes.cnpq.br/2101884291102108
In many duet-singing songbirds, paired birds combine their song types non randomly to form antiphonal duet songs. In Troglodytidae family (wrens and thrushes), 23 species have been reported to duet, Thryothorus genibarbis is a duet specie. The duet song carries the specie-specific information, however, its physical parameters (frequency and duration) varies among pairs and just the syntax, that means the notes sequence, is conserved. To investigate the syntax and physical parameters’ importance in coding the specie-specific information, playback experiments were conducted using modified duet song in syntax and frequency bandwidth with pairs at Gunma Ecological Park (Santa Bárbara city, Pará State) at Federal University of Pará (Belém city, Pará State). We search for evidence of a modulation pattern in song units of this specie, and investigate the similarities between the Thryothorus genibarbis song syntax and other seven same genera species. Our analysis of the modulation of the duet of this species revealed that was a modulation pattern in duet song units of different pairs. By comparing the similarity of duet song syntax between T. genibarbis and other species, we showed that T. genibarbis and T. leucotis, syntopic species, are most different than sympatric ones. We thus show experimentally that the duet syntax of T. genibarbis must be important to coordinate the duet song among pairs, but there is no specie-specific code in duet syntax, however, if we modify the frequency bandwidth more than 36% from original signal, the duet song could lose the specie-specific code.
Acesso aberto (Open Access)
O efeito das vocalizações de phlegopsis nigromaculata (aves, thamnophilidae) na detectabilidade de outras aves seguidoras de correição no parque ecológico de gunma.
(Universidade Federal do Pará, 2016-09-15) LIMA, Hilário Póvoas de; HENRIQUES, Alda Loureiro; http://lattes.cnpq.br/6031840881584358; SILVA, Maria Luisa da; http://lattes.cnpq.br/2101884291102108
Army ants are nomadic species when foraging they chase insects that live on the forest floor, making them easy prey for other animals. There are bird species that follow and feed around army ants swarms they can be obligatory, or are less specialized feeding around swarms only when the latter pass by the former territories. We then conducted experiments to check if the sounds emitted by a specialized follower of army ants, Phlegopsis nigromaculata, influences the behavior of other specialized or less specialized army ants followers. This study was conducted in Gunma Ecological Park (GEP) and investigated whether the playback (PB) of Phlegopsis nigromaculata vocalizations could increase the detectability of other bird species at the site, and if the affected species have some relation with foraging around army ants swarms. We recorded sounds in different locations in GEP, first we recorded 5 minutes of environment sounds without emission of PB and then recorded 5 minutes from the same environment with emission of PB. The results indicated that PB significantly increased detectability, where 94% of the species with the highest detectability post-PB attend to a mixed flock and 28% are followers army ants. In scores that correlated the most detected species during the post-PB period with behaviors of following mixed flocks and army ants, the species Glyphorynchus spirurus, Isleria hauxwelli, Pyriglena leuconota, Lanio surinamus, Lepidothrix iris, Veniliornis affinis, and Willisornis vidua obtained the higher scores, all of which attend mixed flock and 71% attend army ants swarm. These results suggest that the increased detectability of those species in the post-PB is related to the foraging around swarms. The results indicate that 18 species can be influenced by the vocalizations Phlegopsis nigromaculata because this can have a significant role in foraging behavior of other insectivorous birds, which follow army ants or attending mixed flocks.