Yes, there have been notable developments in the concept of proximity fuses since their initial invention during World War II. One major advancement has been the miniaturization and integration of electronic components, which has allowed for greater accuracy and reliability in modern proximity fuses. Another key development has been the use of radar and other advanced sensing technologies to improve the detection of targets and the triggering of the fuse. 

There has been ongoing research into new materials and designs for proximity fuses, aimed at improving their durability and performance in various environments. These advancements have made proximity fuses a critical component of modern missile and artillery systems, enabling greater accuracy and effectiveness in military operations.
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