Following an outburst in 2001 July, the UV flux of WZ Sge has declined slowly toward pre-outburst levels. Here, we describe new 1150-1710Å HST/STIS spectra of WZ Sge obtained between 2002 April and 2003 March to follow the decline. A combined analysis of these and spectra obtained in the fall of 2001 show that if log g=8.5, then the white dwarf temperature decreased from 23,400 K in 2001 Oc-tob...

We carried out time-resolved photometric observations of an SU UMa type dwarf nova, BC UMa, during its superoutburst in February 2003. We detect early superhumps ( or outburst orbital humps) during the first two days of the outburst. The period of early superhumps is 0.06258(13) d and the amplitude is 0.04 mag. After the early superhump phase, common superhumps with an amplitude of 0.3 mag and ...

Abstract Crack formation process in the Ti-23Al-23Nb-1.4V-0.8Zr-0.4Mo-0.4Si (at.%) alloy based on orthorhombic titanium aluminide (Ti 2 AlNb), especially weld zone (WZ), heat-affected (HAZ), and base metal (BM), during laser beam welding (LBW) at room temperature was considered. It determined that crack spread WZ throughout crystallites of ?-phase. In HAZ, cracks globular ?-phase crystals body ...

In some video coding applications, it is desirable to reduce the complexity of the video encoder at the expense of a more complex decoder. Wyner–Ziv (WZ) video coding is a new paradigm that aims to achieve this. To allocate a proper number of bits to each frame, most WZ video coding algorithms use a feedback channel, which allows the decoder to request additional bits when needed. However, due ...

The present work deals with assessment of tensile strength, hardness, fracture behavior and microstructural changes in welded Al-6061 plates. MIG welding has been done filler rod whereas no metal applied during TIG for comparing the results FSW, a filler-less solid-state welding. ultimate strength (UTS) MIGW sample found 75% 111% higher than that FSW TIGW samples respectively. Also, elongation ...

Abstract In the present study, gas tungsten arc welding was employed to weld Ti-stabilized 439 ferritic stainless steel using 308L austenitic filler electrode with varying heat input, i.e., low input (LHI) and high (HHI). The optical microstructure revealed formation of retained austenite (RA) ferrite in zone (WZ), whereas peppery structure consisting chromium-rich carbides were observed heat-a...