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Meeting of Style

Next up! Meeting of Styles Poland See you there peoples! #mospoland #moslublin @meetingofstylespoland

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RF-5A Single-seat reconnaissance version of the F-5A fighter. Approximately 120 were built. RF-5A (G) Single-seat reconnaissance version of the F-5A fighter for the Royal Norwegian Air Force. RF-5E Tigereye Single-seat reconnaissance version of the F-5E fighter. The RF-5E Tigereye was exported to Saudi Arabia and Malaysia. RF-5E Tigergazer Seven upgraded single-seat reconnaissance version of the F-5E for Taiwan by ST Aerospace. RF-5S Tigereye Single-seat reconnaissance version of the F-5S for the Republic of Singapore Air Force. AR-9 Spanish reconnaissance aircraft B.TKh.18 Thai designation of the RF-5A

Fan Death Records, an American record label FDR Music Charts, an official record chart of the Ukraine Franklin Delano Romanowski, a character from the television show Seinfeld Freedomain Radio, a podcast

The Sigiriya Frescoes are found in Sigiriya in Sri Lanka. Painted during the reign of King Kashyapa I (ruled 477 495 AD). The generally accepted view is that they are portrayals of women of the royal court of the king depicted as celestial nymphs showering flowers upon the humans below. They bear some resemblance to the Gupta style of painting found in the Ajanta Caves in India. They are, however, far more enlivened and colorful and uniquely Sri Lankan in character. They are the only surviving secular art from antiquity found in Sri Lanka today. The painting technique used on the Sigiriya paintings is "fresco lustro." It varies slightly from the pure fresco technique in that it also contains a mild binding agent or glue. This gives the painting added durability, as clearly demonstrated by the fact that they have survived, exposed to the elements, for over 1,500 years. Located in a small sheltered depression a hundred meters above ground only 19 survive today. Ancient references, however, refer to the existence of as many as five hundred of these frescoes.

A flame is a mixture of reacting gases and solids emitting visible, infrared, and sometimes ultraviolet light, the frequency spectrum of which depends on the chemical composition of the burning material and intermediate reaction products. In many cases, such as the burning of organic matter, for example wood, or the incomplete combustion of gas, incandescent solid particles called soot produce the familiar red-orange glow of 'fire'. This light has a continuous spectrum. Complete combustion of gas has a dim blue color due to the emission of single-wavelength radiation from various electron transitions in the excited molecules formed in the flame. Usually oxygen is involved, but hydrogen burning in chlorine also produces a flame, producing hydrogen chloride (HCl). Other possible combinations producing flames, amongst many, are fluorine and hydrogen, and hydrazine and nitrogen tetroxide. Hydrogen and hydrazine/UDMH flames are similarly pale blue, while burning boron and its compounds, evaluated in mid-20th century as a high energy fuel for jet and rocket engines, emits intense green flame, leading to its informal nickname of "Green Dragon". The glow of a flame is complex. Black-body radiation is emitted from soot, gas, and fuel particles, though the soot particles are too small to behave like perfect blackbodies. There is also photon emission by de-excited atoms and molecules in the gases. Much of the radiation is emitted in the visible and infrared bands. The color depends on temperature for the black-body radiation, and on chemical makeup for the emission spectra. The dominant color in a flame changes with temperature. The photo of the forest fire in Canada is an excellent example of this variation. Near the ground, where most burning is occurring, the fire is white, the hottest color possible for organic material in general, or yellow. Above the yellow region, the color changes to orange, which is cooler, then red, which is cooler still. Above the red region, combustion no longer occurs, and the uncombusted carbon particles are visible as black smoke. The common distribution of a flame under normal gravity conditions depends on convection, as soot tends to rise to the top of a general flame, as in a candle in normal gravity conditions, making it yellow. In micro gravity or zero gravity, such as an environment in outer space, convection no longer occurs, and the flame becomes spherical, with a tendency to become more blue and more efficient (although it may go out if not moved steadily, as the CO2 from combustion does not disperse as readily in micro gravity, and tends to smother the flame). There are several possible explanations for this difference, of which the most likely is that the temperature is sufficiently evenly distributed that soot is not formed and complete combustion occurs. Experiments by NASA reveal that diffusion flames in micro gravity allow more soot to be completely oxidized after they are produced than diffusion flames on Earth, because of a series of mechanisms that behave differently in micro gravity when compared to normal gravity conditions. These discoveries have potential applications in applied science and industry, especially concerning fuel efficiency. In combustion engines, various steps are taken to eliminate a flame. The method depends mainly on whether the fuel is oil, wood, or a high-energy fuel such as jet fuel.

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