From Adobe Acrobat to free online editors and built-in tools, here’s how to merge multiple PDFs into one document.

Step-by-step instructions for creating PDFs from any file type, including methods for merging, compressing and password-protecting PDF documents securely.

Abstract: Metal slots have been used to obtain strong light-graphene interaction, which usually requires them to be a few tens of nanometers wide. However, narrow metal slot waveguides have a large ...

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