Carbon plays an important role in the metabolism of plants and human.Radiocarbon (14C) is an ideal tracer for vivo human metabolism, disease diagnosis and organ function assessment studies.In this paper, the preparation method of 14C breath test samples for accelerator mass spectrometry (AMS) measurement was developed in China.AMS, with its advanta
Electron beam lithography (EBL) is a pivotal technology in the fabrication of nanoscale devices, renowned for FreeGift its high precision and resolution capabilities.This paper explores the effect of EBL process parameters on various substrate materials, including silicon dioxide, silicon-on-insulator (SOI), and silicon nitride.We specifically inve
The Separate Proffer of the Peace offered to Serbia by the Central Powers in 1915 Changing Mat Cover with the Serbian political and military leadership had no chance to be realised because they were legally, politically and morally tied to the Entente, especially for Russia.The question is whether the acceptance of a Separate Peace in 1915 fared be
Ball screw preload is an important factor in maintaining repeatably, rigidity, and in reducing or eliminating backlash in feed drive systems.Ball screw feeds drives are used in computer numerical control (CNC) machine tools to manufacture high-quality, precision parts.Many fault detection and condition monitoring (CM) methods have been proposed for
One of the most challenging problems in recent antenna engineering fields is to achieve highly reliable beamforming capabilities in an extremely restricted space of small handheld devices.In this paper, we introduce a new perspective on single-radiator multiple-port (SRMP) antenna to alter the traditional approach of multiple-antenna arrays for imp