(Choose two answers.) a,c 4. A PC NIC and a switch port create one electrical circuit to use when sending data from the PC to the switch. The transmitter uses a simple encoding scheme that uses a higher amplitude to encode 1 and a lower amplitude to encode 0, sending 1 bit in each bit time. The bit rate is 2000 bits per second (2000 bps).
Technology is especially a plus in large communities verses smaller communities because there are more people living there. Large communities use many different types of technologies on an everyday basis. Technology is a significant factor in our life that maximizes organization and keeps everything running smoothly. Large communities such as New York, Chicago, and New Orleans are the types of communities that need more technology than other places because they move faster and there are more people. Technology has upgraded in many ways to accommodate these large communities.
(Choose two answers) C. The call uses both analog and digital electrical signals. D. The call represents short sounds as a unique set of bits. 4.) According to this chapter, which of the following concepts happens in a modern-day, end-to-end voice call between two home telephones in the United States? (Choose two answers.)
In the diagram a sine wave is sampled and quantized for PCM. The sine wave is sampled at regular intervals, shown as ticks on the x-axis. For, each sample, one of the available values is chosen by some algorithm. This produces fully discrete representation of the input signal that can be easily encoded as digital data for storage or manipulation. Next, in 1943 Bell Telephone Laboratories developed the first digital scrambled speech transmission, SIGSALY.
(Ahmed, et al., 2013) The gradient magnetic field comes about by the actual process of the MRI. The radiofrequency is switched on and off during an examination. Because of this the gradient magnetic field is born. These waves can produce a current in the pacemakers. They can cause the pacemaker to become faster or slower.
The Shannon And Weaver Mathematical Model Of Communication Nursing Essay The Shannon and Weaver mathematical model of communication (1949) consisted of five key stages; an information source produces a message, this is then encoded into signals by a transmitter, which also sends the message through a channel, the medium through which the message is sent to the receiver, which then decodes the signal and reconstructs the message to be repeated to the destination. An important factor included in this model is the concept of noise, which is regarded as anything that adds to the message being sent distorting clear transmission. Shannon and Weaver’s model provided a one way, linear representation of transmitting information, the source determines the meaning of the message and the receiver passively accepts it. The simple linear structure attracted many critiques, influencing the development of many further models (FISKE 2011). Schramm (1954) criticises the mathematical model by emphasising the importance of feedback, meaning both the speaker and listener take it in turns to send and receive messages.
B The number of vibrations of the crystal in a second. C The time it takes for the crystal to complete one vibration. Write the correct answer (A, B or C) in the box. (1) (Total 3 marks) 2. The diagram shows how two different waves are involved when listening to a radio.
1. Describe the electromagnetic spectrum; make sure you discuss the patterns that occur with frequency and wavelength, as well as the different types of EM waves. Fiber optic data transmission systems send information over fiber by turning electronic signals into light. Light refers to more than the portion of the electromagnetic spectrum that is near to what is visible to the human eye. The electromagnetic spectrum is composed of visible and Near infrared light like that transmitted by fiber, and all other wavelengths used to transmit signals such as AM and FM radio and television.
Inside a speaker: 1. Cone 2. Electromagnet (coil) 3. Permanent magnet The frequency of the vibrations governs the pitch of the sound produced, and their amplitude affects the volume – turn your stereo up high enough and you might even be able to see the diaphragm covering the cone move. To reproduce all the different frequencies of sound in a piece of music faithfully, top quality speakers typically use different sized cones dedicated to high, medium and low frequencies.
Every time we think, move, feel or remember something, our neurons are at work. That work is carried out by small electric signals that zip from neuron to neuron as fast as 250 mph [source: Walker]. The signals are generated by differences in electric potential carried by ions on the membrane of each neuron called neurotransmitters .Through the brain sensing technologies we can observe the electrical, chemical, and physical changes that occur as the brain processes information or responds to various stimuli. BCIs Read electrical signals or other manifestations of brain activity and translate them into a digital form that computers can understand, process, and convert into actions of some kind, such as moving a cursor or turning on a TV. which can be used in various applications like video game, motion of a wheel chair etc.