We present an hitherto unknown cometary reflection nebula {a = 20^h18^m3, δ+37°00') associated with a dense dust cloud. A bright, compact Herbig-Haro oject is embedded in its brightest part. The highly reddened illuminating star of about 3-5 M„, located near the apex of the nebula, emits a collimated bipolar flow at high velocity, whose blueshifted stream feeds the HH object. The redshifted stream can be traced toward the interior of the dark cloud, where the density exceeds 10^5 cm^-3.
High resolution observations of the active region MacMath 16315 near the center of the disk were analysed in order to study the bright points, both below an Arch Filament system and in two neighbouring regions covered by plagettes. The average value of the relative intensity of the bright points with respect to the background in the plagette regions as well as under the Arch Filament system was 1.13 t 0.033. This value was the same for
Hα-1.0 A as well as for Hα-0.75 A . The lifetime of bright points under the Arch Filament System ranges from 3 to 18 min with
average value of 10 min. The time evolution of the intensity of bright points under the Arch Filament system is different from that of the Ellerman bombs under the same system f. The relative intensity of bright points rises to the maximum value within 1 min and remains constant during the rest of its lifetime. The average size of bright
points at Hα-1.0 A was found smaller than that at Hα-0.75 A.
The paper deals with the tire microstructures - microareas of the adhesive interfaces of steel cord - rubber. Namely attention is dedicated to degraded adhesive interfaces upon corrosion failure. The optical microscope is used for microscopy study of surfaces in the area of the adhesive interfaces of metal - rubber. Knowledge about degradation processes into microareas of the adhesive interfaces is important for process study of ultimate states of wear. Also knowledge about characteristic behaviour is possible to use in creation of complex computational models of tires. and Příspěvek se zabývá mikrooblastí adhezních vazeb ocelový výztužný kord - elastomer v pneumatikách z pohledu mikrostruktury. Pozornost je věnována zejména porušeným adhezním vazbám. Pro mikroskopické zkoumání adhezních vazeb kov - pryž je použit světelný mikroskop. Poznatky o iniciaci porušování adhezních vazeb jsou důležité pro studium procesu mezního stavu opotřebení. Znalosti o charakteristickém chování adhezních vazeb a změn materiálových struktur lze uplatnit při tvorbě komplexních výpočtových modelů pneumatik.