The Eternal Thing

Hysteresis behavior implies changing of output depending on the direction of input. We observe this phenomenon across many subjects. The below image shows the Hysteresis observed with respect to the Magnetic field. Magnetic Hysteresis Now, coming to the topic, if you open WhatsApp, we can observe similar behavior when we swipe through "CHATS" to "STATUS" and back. When we swipe from CHATS to STATUS section, the chat icon will not disappear immediately when status comes and will disappear only when the chats section completely disappears ( it means the icon will be there even if we have a small part of the chats section on screen), and then we have the camera icon. We can observe the same thing with the camera icon in the status menu when we move back to chats from status. The camera icon will be there till the status section disappear completely. But it means the icon will be there even when we enter chats, which is against the previous observation that the chat ico

                    Communications is always cool, and especially wireless.... Below is a quiz about cell phones, and the questions may surprise you and even help to fuel your burning desire, especially if you are into communications. The quiz link is here . The favorite question from this side is " how our cell phone knows we are roaming ?? " What's your favorite question ?? If you have more exciting questions that you came across, please share and help us to get, 'The Eternal Thing'...

                 In communications, you might have come across simplex, half duplex and full duplex systems. Further than definitions , we have following thing:- In simplex, as there is only one side communication, the allocated Band Width (BW) allocated can completely used by the signal itself.  Same is the case with the half duplex, since only one signal can use the channel at a time But in the case of full duplex, there will be a simultaneous transmission of  two signals ( transmitted and received ). So, there can be following observations :- The channel BW has to be divided into two halves, each half allocated per signal. For each half of the BW, there will be a carrier signal frequency at the center of the band.  If the channel capacity is more, then it is more effectively used when it is employed with full duplex system. In simplex and half duplex systems, even though channel has more capacity, it goes useless if it is used only for transmitting only one signal... Below video mig