Artwork: Communications satellite. From US Patent: #3,559,919: Active communication satellite, courtesy of US Patent and Trademark Office. These are amazingly complex and expensive machines with tons of electronic bits and pieces jammed into them, but let's not get too bogged down in the detai...
Broad statements suggesting it will be wetter or dryer during certain phases of climate modes hide important detail that could risk misinforming decision makers and suggest greater certainty than is supported by evidence. For instance, while the 2023-2024 El Niño event generally matched ENSO expect...
3. An unsuccessful meeting might be full of single-way communication. {T、F} 4. When the meeting is closed, it means there is nothing to do in the following weeks. {T、F} 5. Minutes should be sent out to the participants within a month after the end of the meeting. {T、F} 点击...
D.To drive away insects.46.What information is provided about distance communication?A.A cell phone is enough for most people.B.AT&T and Sprint offer free service in Egypt.C.A satellite phone doesn’t work in Mid-Egypt.D.Internet cafes are only available in big cities.47.What does “...
How will mobile broadband develop in future? Mobile broadband—in more detail Find out more Fixed-line broadband Most of us go online in two distinctly different ways: with desktop computers (in our homes, offices, and schools) using fixed Internet connections and with mobiles (generally, laptops...
ThisArctic Ocean Floor mapfirst appeared in the October 1971 issue of National Geographic. The detail is extraordinary in such submarine terrains such as continental shelves, abyssal plains, ridges, and fracture zones. This Arctic map illustrates the various landmasses and the ocean floor in stunning...
Cathode-ray televisions like this were invented by Russian physicist and electronics engineer Vladimir Zworykin, whose patent on the idea was filed in 1923 and granted five years later. Here's a detail from one of the original drawings in that patent—and you can see just how closely it res...
You can still recognize the picture, but much of the detail has been lost. This matters much less for text documents than for images. Fax machines come in three main kinds called group 1, group 2, and group 3. The group number is, broadly speaking, a measure of how fast the machine ...