The discovery of an engraving near Mapungubwe that could have been used as an abacus

nano-rods zno as an efficient catalyst for the synthesis of chromene phosphonates, direct amidation and formylation of amines

چکیده ندارد.

The 'What Could Have Been' Photo

The goal of the project is to create new scenarios in a supplied photo by replacing some of its elements with elements from other photos. This could be used to repair imperfectly taken photos (photo with shadow due to camera lens that was partially covered by finger), to remove elements that spoil the imagery of a picture (a garbage can in the middle of a rose garden), or to create an image wit...

Stone tools have been used as cognitive/chronological, cultural

an investigation about the relationship between insurance lines and economic growth; the case study of iran

مطالعات قبلی بازار بیمه را به صورت کلی در نظر می گرفتند اما در این مطالعه صنعت بیمه به عنوان متغیر مستفل به بیمه های زندگی و غیر زندگی شکسته شده و هم چنین بیمه های زندگی به رشته های مختلف بیمه ای که در بازار بیمه ایران سهم قابل توجهی دارند تقسیم میشود. با استفاده از روشهای اقتصاد سنجی داده های برای دوره های 48-89 از مراکز ملی داده جمع آوری شد سپس با تخمین مدل خود بازگشتی برداری همراه با تعدادی ...

Could the Late Permian deep ocean have been anoxic

Models ofocean circulation and biogeochemical cy les are used to speculate bout possible m chanisms of deep-sea anoxia across the Pertoo-Triassic boundary. Two modes of likely Late Permian ocean thermohaline circulation are identified: a vigorous "therm',d mode" driven by cooling in southern polar latitudes and aweaker "haline mode" driven by evaporation fromthe subtropics. We find that the the...