Wireless Communications. various telecommunications systems that use radio waves to carry signals and messages across distances. Wireless communications systems include cellular telephones, pagers, radio telegraphs, satellite telephones, laptop computers, personal digital assistants (PDAs), shortwave radios, and two-way radios. They are used primarily to transmit private communications. Commercial radio and television are …Read the Rest
Wireless Communication Modes
Wireless communication systems have grown and changed as technology has improved. Several different systems are used today, all of which operate on different radio frequencies. …Read the Rest
Wireless Communications Principles
Wireless communications begin with a message that is converted into an electronic signal by a device called a transmitter. There are two types of transmitters: analog …Read the Rest
Superhydrophobic surfaces: From natural to functional
Nature is the creation of aesthetic functional systems, in which many natural materials have vagarious structures. Inspired from nature, such as lotus leaf, butterfly’ wings, …Read the Rest
Skin cells get extra gene to help heart
PATCHES of synthetic skin could deliver gene therapies to patients without the need for injections. Jon Vogel’s team at the National Institutes of Health in …Read the Rest
