The Stingray Nebula, a.k.a. Hen3-1357, appeared for the first time in 1990 when bright nebular lines and radio emission that had not been observed before were unexpectedly discovered. In ensuing years, nebula faded precipitously. We report changes shape large decreases its emission-line fluxes based on well-calibrated images obtained by Hubble Space Telescope 1996 2016. Hen3-1357 is now a "reco...

Surface-enhanced Raman scattering (SERS) fingerprints of individual molecules offer the possibility of multiplexing as well as cancer screening. A highly sensitive, noninvasive, and rapid cancer screening platform encompassing exfoliative cytology and paper-based SERS technology is described. The SERS substrate which consists of plasmonic gold nanorods (GNRs) adsorbed on a piece of filter paper...

ion. ACM SIGPLAN Notices,38(7):244–253, July 2003. CODENSINODQ. ISSN 0362-1340 (print),1523-2867 (print), 1558-1160 (elec-tronic). Krishnaswamy:2003:EPB [855] Arvind Krishnaswamy. Enhancingthe performance of 16-bit code us-ing augmenting instructions. ACMSIGPLAN Notices, 38(7):254–264, July2003. CODEN SINODQ. ISSN 0362-1340 (print), 1523-2867 (print), 1558-<l...

تحلیل وضعیت ترافیکی و پیشنهاد روش‌های مدیریت جریان ترافیک نقش اساسی در ارزیابی عملکرد بسیاری از سیستم‌های حمل‌ونقلی ایفا می‌کند. بین جمع‌آوری داده‌های ترافیکی، رویکردهای مبتنی‌بر فنّاوری‌های نوین که امکان گرد‌آوری حجم پویای زمانی‌ـ مکانی را فراهم می‌آورند استخراج روندها الگوها تسهیل می‌کنند اهمیت دارند. این پژوهش، تهران به‌منزلة پایتخت ایران، با ویژگی‌های اقتصادی اجتماعی خاصی دارد تنوع سفرها به ...

Light is an important limiting factor for the visual foraging process in fishes, and the light regime may potentially affect the competition between visual and tactile predators. We investigated two equal-sized fjords of quite different pelagic food web structure. Earlier studies have revealed that the jellyfish Periphylla periphylla dominates Lurefjorden, while fish predators dominate in the o...