The advantages of oral channels of communication are that they:. Are fast - useful for obtaining very recent unpublished information. Are based on two-way communication and therefore promote an understanding of the real information need(s) and the communication of relevant information. Are flexible. Simplify and facilitate the transmission of information between people working in different subject areas (useful in interdisciplinary studies). Are easy and pleasant to use The disadvantages of oral channels of communication are that they:. Are not open to everyone - established researchers have access to good networks of contacts, but these usually take time to cultivate.
Can lead to misconceptions because the information is sometimes incomplete (lack of detail etc.). Are difficult to maintain and therefore unstable. It can also lead to mis belief,as oral promises do not lend any where. As a human nature one can make mistake in spelling something different which can sometimes leads to major mistake.
Advantage And Disadvantage Of Serial And Parallel Data Transfer
Some of the advantages of verbal communication are: 1) the opportunity for immediate feedback to make sure the message was understood; 2) the opportunity to utilize nonverbal cues (tone, body language, inflection) However, there are several disadvantages and the main one is miscommunication. In other words, what the listener hears is often not what is meant. The simplest words, for example, have a different connotation for people. Psychologists trace it to one's upbringing, social status, family and friends, etc. Generally speaking, men are adverse to expressing their feelings, and hide behind enthusiastic talk about sports, women and cars.
Women are often more observant and intuitively separate the truth in a conversation. Advantages of community college.
Less expensive way to earn college credits for all those non-major courses you'll have to take anyway (English, Math, Sociology, Physical Education, etc.). Usually within an acceptable commute from home so you save on paying for housing and board. Since you can commute from home, you may be able to hold on to that part-time job you like and take classes.
If you struggled in high school and didn't have the grade point average for the college you really wanted, community college gives you a second chance at earning those grades and re-applying. Non verbal communication includes gesture; body language or posture; facial expression and eye contact. Advantages of non verbal communication are, that you can use it, when there is no use of verbal communication. Some times when you don't want to tell something to everyone, you can use nonverbal communication to tell something only to the person you want.
Eye contact is very important in every type of communication, and also very helpful in understanding between two people. Disadvantages: - somebody cannot understand your expression or posture,that you are trying to tell and they misunderstood. And which is not good sometime. Can't be avoided when others are near you.
Advantages of Serial Interface disadvantages of Serial Interface This page covers advantages and disadvantages of Serial Interface. It mentions Serial Interface advantages or benefits and Serial Interface disadvantages or drawbacks. What is Serial Interface? In serial communication data bits are transmitted one after the other in sequential manner using single communication channel.
Example of serial interface is RS-232 which is point to point and asynchronous interface. It is used between devices (i.e.
DTE and DCE). Protocol uses start bit and stop bit for data communication. Serial interfaces may have multiple lines but only one line is used for data communication.
There are two methods in serial communication viz. Synchronous and asychronous. In synchronous communication, block of data (or characters) are transferred at a time. In asynchronous communication, single byte (or bit) is transferred at a time. There are special ICs used for this communication such as UART and USART.
The microcontroller IC such as 8051 consists of in-built UART chip. PISO and SIPO shift registers are used to convert serial data into parallel data and vice versa.
Benefits or advantages of Serial Interface Following are the benefits or advantages of Serial Interface: ➨It uses less number of conducting wires, hence reduces cost of the interface. Radiohead the bends songs. ➨It supports long distance data communication.
➨It uses less number of wires often only one, this leads to simple interface between transmitting and receiving devices or ICs. It is easy to implement. Drawbacks or disadvantages of Serial Interface Following are the disadvantages of Serial Interface: ➨It uses less number of lines for transmission between devices.
'Madeline''s shimmery indie bossa-nova and the countrified ballad 'Tears Are in Your Eyes' showcase 's buttery, empathetic voice; her singing makes these vignettes universal as well as personal. And then nothing turned itself inside-out rar. The wintry, implosive 'Everyday' uses both of these elements, along with a plaintive guitar and hushed, hypnotic vocals, to begin the album on a surprisingly somber note. Like mature indie rock records such as 's and 's, favors mellow songwriting, detailed arrangements, and eclectic influences, such as the -like drum machines and doo wop backing vocals that adorn many of the songs. 'Our Way to Fall' sets 's recollection of falling in love to a dreamy, down-to-earth backdrop of gently brushed drums, luminous organs and vibes; 'The Crying of Lot G' transforms the syrupy sweetness of '50s ballads into a monologue about a relationship's shortcomings.
Hence it supports slower speed of transmission. ➨It occupies overhead of about 20% other than useful information. This leads to wastage of bandwidth meant for data trasmission for useless stuff.
Also refer advantages and disadvantages of type. Advantages and Disadvantages of other wireless technologies.
Advantages And Disadvantages Of Serial And Parallel Data Transmission
There actually isn't any advantage or disadvantages of using a balanced verse unbalanced transmission line. Selection of transmission line is based upon several factors: 1) required transmission line impedance between the source and the receiver (load), 2) application of the transmission line (RF, audio, digital data, etc.), and 3) transmit/receive port design. Factor 1, 2, and 3 examples.
Radio frequency energy transfer from a (HF, VHF, UHF) transmitter to an antenna requires a transmission line impedance that equals the output source impedance and the antenna's input impedance. The transmitter output source impedance is typically 50 - 75 ohms and the antenna input impedance is usually the same. Real life examples are amateur radio, commercial broadcast radio and television, citizen band radio, etc. Therefore, a 50 or 75 ohm transmission line is needed to couple the RF energy between transmitter and antenna.
Coaxial cables are used to transfer RF transmitted energy from the transmitter to a receiver, and coaxial cables are unbalanced transmission lines. Another even more familiar example is your cable television connection. Cable television industries use 75 ohm coaxial cable, therefore, the television's cable input port had to designed by the manufacturer to accept an unbalanced 75 ohm coaxial cable. Hence, the television's input impedance is 75 ohms. In the case of transmission of digital data, CAT 5 cables are used because of their relatively low loss and excellent rejection of mutual inductive coupling of external noise and signals onto the cable.
This is achieved by the use of twisted pair cable with external shielding. CAT 5 cable is a balanced transmission line. CAT 5 cable characteristic impedance is 100 ohms.
The digital data transmitter and receivers may have been designed to accommodate CAT 5 transmission medium in this case, hence, the output source impedance and receiver input impedance is 100 ohms. By the way, coaxial cable has excellent rejection of external RF signals and other potential sources of noise because of its design as well. The coaxial cable inner conductor is surrounded by a braided shield along the entire length of the cable. Therefore, signal attenuation characteristics and noise rejection capabilities are not dependent upon whether or not the transmission line is balanced or unbalanced.
Excellent signal transmission characteristics can be achieved from both balanced and unbalanced transmission lines. Back in the old days when television reception was dependent upon a set of rabbit ears or an external TV antenna mounted on the roof, called a log-periodic antenna, the transmission line connecting the antenna to the TV receiver was a 300 ohm parallel conductor line. The 300 ohm line was cheaper than coax so the television receiver port was designed with a 300 ohm input impedance. That 300 ohm transmission line was a balanced transmission line. Today, televisions come with an unbalanced 75 ohm cable connection.
Therefore, if a home owner wants to connect their new TV to their existing roof mounted log-periodic antenna using their balanced 300 ohm cable they would need to install a device called a balun to convert the 300 ohm balanced connection to a 75 ohm unbalanced transmission line connection. These devices are very common and readily available at electronics stores. Audio cables use balanced transmission lines. The audio amplifier output and speaker input ports are designed for balanced connections. Parallel transmission is a method of transmitting data where each bit in a byte is transmitted in an individual channel or wire, hence multiple bits can be sent at the same time. Parallel transmission is often used internally in a computer since it is quick and the distances involved are short, as well as in devices such as disk drives, joysticks and a majority of printers.
Parallel transmission, however, has the disadvantage of bits getting out or order when transmitted over a long distance. This is known as data skew. What is arguably the major disadvantage of a parallel circuit is that as you add more and more things in parallel, the current draw on the source goes up and up and up.
If the source cannot supply the current that is 'demanded' by the devices all strapped across the so-called 'rails' of the circuit, the voltage will (must!) decrease. This could be very bad, as some devices, notably motors, don't like to run at low voltage and can actually be damaged if voltage sags too much and they don't have undervoltage protection. Fortunately, we have a pretty good power grid in many places, and this isn't a problem.
Additionally, many devices have undervoltage protection built in, and they'll 'trip' and shut down if voltages sag to a preset threshold.
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