Monocrom (Spain)

Kakimoji é o termo utilizado para abordar a representação gráfica do som em quadrinhos japoneses, os mangá. E desde a segunda onda do mangá, entre 2013 a 2015(BRAGA JR., 2019), quando houve um significativo aumento da publicação independente, acompanhamos a discussão sobre o que de fato é o mangá brasileiro. Nesta pesquisa, apresentaremos como o elemento da onomatopeia (tratada como kakimoji nesta análise) pode ser abordado enquanto elemento pictórico e/ou esquemático (TWYMAN, 1976) no volume 1 de Lampião, um mangá brasileiro ilustrado por Heitor Amatsu e roteirizado por Carlos. Encontramos e analisamos 102 registros de kakimoji na obra com 120 páginas, a maioria monocromática. Nosso objetivo com tal abordagem é trazer à luz do Design como um quadrinho independente, no formato de mangá brasileiro, pode misturar elementos de culturas distintas, através do emprego da onomatopeia, e, ainda assim, ser consagrado como produção nacional. Além disso, aplicamos as categorias de classificação gráfica da onomatopeia desenvolvidas por Araújo (2021) a fim de investigarmos as características visuais de cada uma, de acordo com traço, cor, escala e movimento.

The control problem of bi-directional (back-to-back) converters is approached in this paper. The controller design is carried out by following the so-called Interconnection and Damping Assignment - Passivity Based Control (IDA-PBC) technique. The contribution is two-fold, namely, the solution of the mixed, regulation and tracking, control problem imposed by the converter and the illustration that the passivity methodology can be also applied when more complicated loads than simple resistances are considered. The proposed controller is numerically evaluated considering its operation when bidirectional energy flows are introduced.

Lasing with an output power up to 300 mW is reported for Tm:NaGd(WO4)2, both with Ti-sapphire and diode laser pumping. This disordered crystal grown by the Czochralski method allowed tuning from 1813 to 2025 nm.

The strongly anisotropic monoclinic double tungstates are known for their large absorption and emission cross sections and broader spectral lines of the rare earth dopants which makes them preferable for diode pumping. In the case of Tm the position of the absorption peak near 800 nm is very suitable for pumping with AlGaAs laser diodes. For the first time to our knowledge we grew Tm-doped KLu(WO₄)₂ crystals with high optical quality and obtained cw laser oscillation with a commercial 20 W diode bar. Only simple beam shaping optics was used for the 802 nm pump beam. The 2.9 mm thick, uncoated, 3 at. % Tm-doped KLu(WO₄)₂ was studied in a nearly hemispherical 50 mm long cavity with longitudinal pumping. Room temperature was maintained by water cooling the crystal. The sample was <i>N_g</i>-cut and the oscillating polarization was parallel to the <i>N_m</i> optical axis. With a 3% output coupler the polarized output at 1950 nm reached 4 W for 15 W of incident pump power. The slope efficiency with respect to the absorbed pump power amounted to 69% and the maximum optical efficiency reached 47%. It is the first time such high powers were generated with Tm-doped monoclinic double tungstates.