A Possible Origin of Petrol-Fields

A Possible Origin of Magnetic Fields in Galaxies and Clusters: Strong Magnetic fields

We propose that strong magnetic fields should be generated at shock waves associated with formation of galaxies or clusters of galaxies by the Weibel instability, an instability in collisionless plasmas. The strength of the magnetic fields generated through this mechanism is close to the order of those observed in galaxies or clusters of galaxies at present. If the generated fields do not decay...

Increased Miscarriage Rate in Female Farmers Working in Saffron Fields: A Possible Effect of Saffron Toxicity

Background: There is much debate about effects of medicinal plants such as saffron (Crocus sativus) on human health. Women are highly involved in farming and processing of this plant. This study is aimed at evaluating the saffron impacts on miscarriage rate of female farmers working in saffron fields. Methods: This was a prospective case-control study on pregnant female farmers during harvestin...

control of the optical properties of nanoparticles by laser fields

در این پایان نامه، درهمتنیدگی بین یک سیستم نقطه کوانتومی دوگانه(مولکول نقطه کوانتومی) و میدان مورد مطالعه قرار گرفته است. از آنتروپی ون نیومن به عنوان ابزاری برای بررسی درهمتنیدگی بین اتم و میدان استفاده شده و تاثیر پارامترهای مختلف، نظیر تونل زنی(که توسط تغییر ولتاژ ایجاد می شود)، شدت میدان و نسبت دو گسیل خودبخودی بر رفتار درجه درهمتنیدگی سیستم بررسی شده اشت.با تغییر هر یک از این پارامترها، در...

A Possible Origin of Dark Energy

We discuss the possibility that the existence of dark energy may be due to the presence of a spin zero field φ(x), either elementary or composite. In the presence of other matter field, the transformation φ(x) → φ(x) + constant can generate a negative pressure, like the cosmological constant. In this picture, our universe can be thought as a very large bag, similar to the much smaller MIT bag m...

A Possible Origin of Logic 3