Abstract: Owing to the effects of atmospheric refraction, the path of light propagation is bent, making the three-point collinear principle inapplicable and influencing the geometric accuracy of ...

Greaseweazle is a hardware and software solution that lets you archive or regenerate old floppy disks. Reading them is useful for recovering old data or forgotten programs that you can use in your ...

Sir Isaac Newton once wrote, in what must be one of the most oft-quoted lines in the history of science, "If I have seen further it is by standing upon the shoulders of giants." Well, any of us who ...

Abstract: Intelligent reflecting surface (IRS) is an enabling technology to engineer the radio signal propagation in wireless networks. By smartly tuning the signal reflection via a large number of ...

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Now the nights are getting longer, it's the perfect time to start looking for your next telescope — especially with Black Friday taking place on November 28. When you purchase through links on our ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. There are so many things to consider when buying a telescope, especially when it is your first.

The refraction index contrast is m ≃ 1.1 and the wavelength we used is λ = 976 nm, resulting in v ≃ 7, well above the dipolar regime. The Laguerre–Gaussian or vortex beams employed in Figure 1 are ...