objective: experiencing ‎pleasant events during daily life ‎has a significant positive role in ‎the personal mental health and ‎acts as a keystone for “behavioral ‎activation” (ba) interventions. ‎there are serious differences in ‎the pleasant event schedules in ‎different cultures and countries. ‎we aimed to develop a persian ‎checklist of pleasant events ‎‎(pcpe) to provide and validate a ‎cu...

Optical tunability and repeatability are essential in fabricating optoelectronic devices from waveguides to Bragg gratings (BGs) for high-energy, high-power, mode-locking, sensing applications. For this purpose, a controlled adjustment the optical properties, including refractive index of deposited nanolayers, becomes critical. This study reveals that silicon oxynitride (SiON) doping into (Si) ...

Optical properties of BaF2 single crystals doped with Yb3+ and Er ions are studied. The highest ?UC value 10.0% was demonstrated for the BaF2:Er3+ (2 mol%) /Yb3+ (3 sample under 490 W cm?2 976 nm excitation.