Then, you need to be able to identify which journals are peer-reviewed. There are generally four methods for doing this: 1  Limiting a database search to peer-reviewed journals only. 2  Some databases allow you to limit searches for articles to peer reviewed journals only.
A walkie-talkie (more formally known as a handheld transceiver, or HT) is a hand-held, portable, two-way radio transceiver. Its development during the Second World War has been variously credited to Donald L. Hings, radio engineer Alfred J. Gross, and engineering teams at Motorola.
Use a Trigger-Free Monopod. A trigger-free monopod is an extendable stick with a bracket on one end for holding the camera phone. As using the selfie stick means the phone is beyond the reach of the photographer, the only way to take the photograph is to activate a timer function.