There are two main types of smoke alarm tech, says Raman Chagger, principal consultant at BRE, the Building Research Establishment. Ionisation-based systems use a tiny amount of radioactive material to charge, or ionise, particles in the air which flow between two small plates. Should smoke interrupt that flow of charged particles, the alarm goes off.
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以色列目前拥有超过250家活跃的半导体公司，约占其科技行业的3.5%，雇佣员工约4.5万人。过去十年，该领域增长了16%，但报告指出，增长模式已从快速扩张转向更为稳定、资本密集型的增长。