Two top public-speaking coaches offer fresh advice on giving effective speeches and presentations with the immediacy of a conversation.

The best speeches don't sound like speeches, and the best speakers make listeners feel as though they are being addressed directly. The trick is to make every presentation as natural and direct as a one-on-one conversation. This expert but accessible guide reveals:

- The six truths behind every conversation-and how to use them at the podium
- The three steps to inspiring any audience
- The seven secrets for using voice and body language
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Essential Laser Safety explains in detail the biological effects of laser radiation, particularly on the eye, the provisions and requirements of the international laser safety standard IEC 60825-1 (including a full description of the recently revised system of laser classification) and discusses practical issues of risk assessment, safety controls, eye protection and laser safety management. It also explains the rationale for the often-complex laser emission and exposure limits given in the standard, and provides detailed guidance for using the standard to carry out quantitative laser...