Transmission Of A Tv Signal English Language Essay

Transmission Of A Tv Signal English Language Essay In electronics, many different types of carrier signals exists and due to the fact that this signals simply carry data intended for a different audience, which most of the times, are farther than the area of production of such signals. This gave rise to various modulation techniques to ensure effective transfer of these signals bearing information without loss of quality or degradation. This paper deals on how to modulate a Television (TV) signal using 16-QAM (Quadrature Amplitude Modulation) Keywords include: 16-QAM, TV Signals, Amplitude Modulation, Data, and Attenuation, baseband. 1.0 Introduction Everyday different types of signals transverse the air around us, most of which we cant feel or see, but we see their impact or influence everyday through different electronic gadgets we have or own personally. Most of these electronic gadgets are able to work as a result of them being able to receive a signal and they able to correctly interpret that signal and we in turn appreciate the devices. For the devices to correctly interpret these signals a kind of technique was used and this is known as Demodulation, this being that the devices are designed to receive this type of signals. The processes that led to being able to demodulate is what my focus is on; the process is known as modulation. Why modulation? This is due to the fact that not all intended users of a particular device or service reside close to the production station and also production signals called baseband signals cant travel much and would need a lot of power to transmit them over the air medium and this adds to the operating cost of the station and this is not acceptable. 2.0 Transmission medium for TV signal As with any kind of signal, the most important of that signal is to be received and decoded correctly, so that information encoded can be seen or viewed. The medium of passage of such signals is of consequence, because these helps to know the appropriate modulation to use and what, this information is tied to the channel coding, the advantages of the channel and the noise rate of that channel in consideration. For example, the transmission medium for sound received by the ears is usually air, sound can also travel through solids, liquids and plasma Electromagnetic waves have no need of any material substance for it to propagate but can be affected by the transmission media they pass through at the boundary between the media by absorption, reflection or refraction. Therefore, TV signals are like communicating data sent from one location to another which requires a pathway or medium. These pathways, called communication channels; two types of preferred media are: (a) Cable (twisted-pair wire, cable, and fibre-optic cable) and (b) broadcast (microwave, satellite, radio, and infrared). {Note:- Cable media use physical wires of cables to transmit data and information, while Twisted-pair wire and coaxial cables are made of copper, and fibre-optic cable is made of glass.} 2.1 BASEBAND SIGNAL The definition of a baseband signal is a signal that contains information, which may vary from audio signals, video signals, speech signal, image signal and many different other types depending on application and use. These signals cant move more than a few metres after production; for example, a speech signal; two persons can hear themselves clearly in close proximity to each other, as the distance between them increase, they start hearing faint messages or signals from each other and at a point, they cant hear each other again. Therefore for them to be heard no matter the distance between them there is need to modulate the speech signal generated by each person, so that each person can hear what the other person has said or is saying. A signal can be said to be an analogue data stream with which it varies with respect to space and time; with this property, each signal can be sampled, quantized, and transformed into digital data streams or packets. These processes it goes from being analogue to digital data streams or packet is called modulation. There are different modulation techniques used to carry different signals depending on the transmission medium and the condition inherent in that medium. 2.2 Modulation What is modulation? According to Margaret Rouse, modulation is the combination of signal to an electronic signal carrier, modulation is useful in direct current by turning it on and off to alternating current. Literally, modulation can be said to be a way of quicken the transfer of data or information through a medium. Transmission of sound through air has restricted degree of power generated by the lungs, to give the extent at which the voice can reach there is need to transmit it through a medium such as phone line, radio etc. therefore, the successful conversion of information in this case voice, to pass through a medium such as wire or radio waves is known as Modulation (www.complextoreal.com ). 2.3 TYPES OF MODULATION Modulation helps in many ways and it can be referred to as the process of transposing a signal wave onto a carrier wave in order to carry information. There are 3 three key properties of this carrier wave, which is a sinusoid wave with an amplitude, a phase and a frequency, these properties can be exploited to generate another kind of waveform to carry the intended information which is known referred to as a modulated signal. (www.encyclopediapro.com/mw/modulation) In most part of the world, frequency spectrum is expensive to waste and often its a national property, which means, to use it, the intending user has to be licensed and must follow a protocol process to have that frequency band assigned to him solely and given the channels parameters he can use. This is because, there are many different users competing for the same frequency band, due to the fact that the lower the frequency given, the lower the operating cost of using that frequency band. There are 2 broad class of modulation; they are the analogue modulation and the digital modulation. In analogue modulation, there is a continuous change in response to the signal to be modulated; this can be seen in Phase Modulation, Frequency Modulation, Amplitude Modulation, Single-Sideband Modulation, and Vestigial-sideband Modulation. In digital Modulation, there are changes in the signal position with respect to a starting position, while each position corresponds to a piece of information or symbol and can be represented on a constellation diagram. Examples include: Phase-Shift Key (PSK), Frequency-shift Key (FSK), Amplitude-shift Key (ASK), Minimum-shift Key (MSK), Gaussian minimum-shift Key (GMSK), Very minimum-shift Key (VMSK), Quadrature Amplitude Modulation (QAM), this a combination of PSK and ASK. Continuous phase modulation  (CPM) and Trellis coded modulation  (TCM). (www.encyclopediapro.com/mw/modulation) For each of these types of modulation techniques, their phases, frequencies and amplitude are assigned a unique sequence of bits which corresponds to an equal number of bits and make up a symbol that represent that particular phase or code. 3.0 QAM The modulation of interest for the purpose of his paper is the QAM, or Quadrature Amplitude Modulation, from research; it was noticed that QAM has both an analogue and digital modulation properties depending on how its to be applied. QAM is made up of two modulation scheme, namely the Amplitude-shift Keying which is achieved by modulating or changing the state of the amplitude of two carrier waves to carry two analogue message signal or two digital data streams. The other is the Phase-shift Keying, in which the sinusoidal waves are usually out of phase to each other and apart by 90o. When these two waveforms are combined, it results to Quadrature Amplitude Modulation (two different amplitudes two out of phase signals). QAM, this modulation technique is used to encode and transmit digital cable channels, while the simplest of the QAM techniques is the 16-QAM i.e. 24 phase points, this is able to carry 6MHz bandwidth regulated by the authoritys policy. The type of signal interested in is the signal generated from a video source, this type of signal consumes more than the set frequency of 6MHz, a typical video source signal is huge, so using 16- QAM techniques, it is possible to encode the signal onto the QAM carrier wave to carry it and pass through the 6MHz bandwidth limit and still be able to carry additional signals such as the voice signal component of the video signal. However there are different video formats such as the NTSC, PAL, MPEG; this video formats also help in reducing the size of video signal, hereby assisting the 16-QAM to effectively encode the signal without loss of quality and making it noise proof. Other variants of QAM includes 64, 256 phase variants, but as this phases size inc rease, so do they incorporate noise and mismatching often affect the performance of the receiver to be correctly tuned in to receive the sequence of bits sent over the medium. One of the uses of QAM is in the modulation of digital television systems, due to its high spectral efficiencies and the requirement of a cleaner path, and such hybrid fibre coaxial cables are used to deliver digital television signals to homes. (http://en.wikipedia.org/wiki/QAM_tuner, 2012) In the United Kingdom, 2 variants of the QAM are being used, this are the 16 and 64 variants and they are used for digital terrestrial TV like Freeview by British Telecoms Top-Up TV, while for the 256-QAM, is being considered for the HD version of freeview which is delivered over high speed fibre optics links to homes across the country. Therefore, the makeup of QAM is shown via the figure below and the different modulation techniques it uses to modulate and encode its own signal and how it lead to the development of QAM. 3.0.1 Amplitude Shift Keying (Ask) According to N.Vlajic (2010), Ask is the modulation of digital data with changes in the amplitude of a carrier while both frequencies an d phase remain constant; carrier signal is varied by representing the binary with 0 and 1. Also in ASK, the mode of operation is to vary the amplitude of the carrier wave to carry a baseband signal, while the frequency and phase remain constant. Ask has two levels called binary bits of implementing its modulation process and it is often referred to as Binary Amplitude shift keying or on-off keying (B-ASK or OOK). Each binary bit corresponds to a symbol that represents an amplitude level. According to (Glover and Grant, 2004, chapter 11, page 391), they said that in B-ASK, the two digital levels can be one and zero, to represent the pulse of a sinusoidal carrier wave, although any one of the changing amplitude can be inferred to be one and the other zero and from this result, it describes why it also referred to as on-off keying sequence. This method of digital sequence of one and zero can be referred to a switch and was used to transmit Morse codes (Wikipedia) in the early 20th century. In recent times, additional amplitude levels has been developed for enhanced encoding schemes such as a 4 four level encoding scheme to take on two bits or 22with corresponding shift in amplitude, also there is an eight level scheme to represent 3 three bits or 23, and so on. This gives a reduced power required to transmit and hence advantageous to use. (Wikipedia-http://en.wikipedia.org/wiki/Amplitude-shift_keying) A binary amplitude-shift keying (BASK) signal can be defined by S (t) = A m (t) cos 2pfct. For: (0 Implementation of ASK is relatively cheap and simple but its amplitude is usually affected by noise, distortion s and the propagation conditions on different route which makes the process more difficult. In ASK digital data is transmitted over an optical fiber. Figure 1. ASK signal representation. 3.0.2 Phase shift keying (PSK) Phase-shift keying (PSK) refers to a modulation scheme that is used to carry information by changing, or modulating, the phase of the carrier wave. PSK can still be defined as the modulation of digital data with amplitude at peak, frequency remain constant and phase with carrier signal varied to depict binary 0 or 1, with binary 0 = 180 degree phase and binary 1 = 0 degree.PSK is not sensitive to error and productively make use of bandwidth, so high data rate is possible but has more complex signal detection (N. Vlajic, 2010). This modulation scheme like the Amplitude shift Keying (or ASK) also uses a finite number of distinct signals to represent digital data. Each of the finite phases, is assigned a unique pattern of binary digits that forms a symbol. Phase shift keying comes in two forms, which are binary PSK (this uses two phases which are 180o apart) and Quadrature PSK (this uses four phases and the phases are 45o, -45o 135o and -135o). (Forouzan, 2013 pg 144) 3.0.2.1 Binary PSK In Binary PSK, it has only two signal element said suggested by Forouzan, 2013, pg 142; with each phase set at 0o and the other at 180o. The general form for BPSK follows this equation Sn (t). (wikipedia- H. Stern S. Mahmoud, Communications Systems, Pearson Prentice Hall, 2004, p283) s_n(t) = sqrt{frac{2E_b}{T_b}} cos(2 pi f_c t + pi(1-n )), n = 0,1. This yields two phases, 0 and à Ã¢â€š ¬. In the specific form, binary data is often conveyed with the following signals: s_0(t) = sqrt{frac{2E_b}{T_b}} cos(2 pi f_c t + pi ) = sqrt{frac{2E_b}{T_b}} cos(2 pi f_c t)For binary 0 s_1(t) = sqrt{frac{2E_b}{T_b}} cos(2 pi f_c t) For binary 1 [where fc is frequency of the carrier-wave.] Also, the BER of a two signal BPSK in AWGN can be calculated as follows P_b = Qleft(sqrt{frac{2E_b}{N_0}}right) P_b = frac{1}{2} operatorname{erfc} left( sqrt{frac{E_b}{N_0}}right) 3.0.2.2 Quadrature PSK This sub part of psk is such that it uses two separate BPSK modulations to generate a QPSK modulation scheme; this is able to work due to each BPSK band as an in-phase carrier and the other out of phase carrier. The phases are different and the first point is located at 45o, then 135o, then -135o and lastly -45o, the amplitude stays constant at 2 ½. The bit stream is then split into two bit streams I (in-phase) and Q (Quadrature) .The bit stream in-phase (I) is called the even stream and quadrature(Q) is called Odd stream. (http://turboblogsite.com/quadrature-phase-shift-keying-qpsk-modulation.html) QPSK is used mostly to transfer digital data by varying the phases of the carrier signal, the 4 phase points tally with 4 points on a circle and can be so represented. The figure below shows the mapping of the 4 phase points. QPSK diagram showing how four different binary codes can be transmitted Fig: QPSK diagram showing how four different binary codes can be transmitted The list below gives some of the other commonly used forms of phase shift keying, PSK, they are O-QPSK Offset Quadrature Phase Shift Keying, 8 PSK 8 Point Phase Shift Keying, 16 PSK 16 Point Phase Shift Keying, QAM Quadrature Amplitude Modulation, 16 QAM 16 Point Quadrature Amplitude Modulation and 64 QAM 64 Point Quadrature Amplitude Modulation (http://www.radio-electronics.com/info/rf-technology-design/pm-phase-modulation/what-is-psk-phase-shift-keying-tutorial.php) Figure 2. PSK signal diagram representation 3.1 QAM bits per symbol The advantage of using QAM is that it is a higher order form of modulation and as a result it is able to carry more bits of information per symbol. By selecting a higher order format of QAM, the data rate of a link can be increased. (http://www.radio-electronics.com/info/rf-technology-design/pm-phase-modulation/8qam-16qam-32qam-64qam-128qam-256qam.php) The table below gives a summary of the bit rates of different forms of QAM and PSK. Modulation Bits per symbol Symbol Rate BPSK 1 1 x bit rate QPSK 2 1/2 bit rate 8PSK 3 1/3 bit rate 16QAM 4 1/4 bit rate 32QAM 5 1/5 bit rate 64QAM 6 1/6 bit rate 3.1.1 Quantized QAM using constellation diagram In QAM, the constellation diagram plots are usually arranged in square formation with different spacing and this spacing point represent binary bits per symbol, this spacing point is in the power of 2s. The more the bits per symbol, the more it is to transfer more information over a given channel or medium. But as the bits increase, the points move closer and make the system susceptible to noise corruption, and this gives rise to a high BER ratio, making useless the information sent due to its high noise component. There are different bit positions for the constellation diagram, this diagrams show the different position of each symbol and the states of QAM, and the constellation diagrams for BSPK, 16 QAM. 32 QAM, 64 QAM. Therefore, the figures below show various constellation diagrams: http://www.radio-electronics.com/info/rf-technology-design/pm-phase-modulation/modulation-constellation-bpsk.gif http://www.radio-electronics.com/info/rf-technology-design/pm-phase-modulation/modulation-constellation-16qam.gif http://www.radio-electronics.com/info/rf-technology-design/pm-phase-modulation/modulation-constellation-32qam.gif http://www.radio-electronics.com/info/rf-technology-design/pm-phase-modulation/modulation-constellation-64qam.gif 3.1.2 QAM applications QAM is in many radio communications and data delivery applications. However some specific variants of QAM are used in some specific applications and standards. For domestic broadcast applications for example, 64 QAM and 256 QAM are often used in digital cable television and cable modem applications. In the UK, 16 QAM and 64 QAM are currently used for digital terrestrial television using DVB Digital Video Broadcasting. In the US, 64 QAM and 256 QAM are the mandated modulation schemes for digital cable as standardised by the SCTE in the standard ANSI/SCTE 07 2000. In addition to this, variants of QAM are also used for many wireless and cellular technology applications. 4.0 Conclusion In this review, it is clearly shown that Amplitude Shift Keying (ASK) and Phase Shift Keying (PSK) modulation techniques that form Quadrature Amplitude Modulation (QAM) ensures effective transfer of TV signals In QAM different combination of amplitude and phase are used to achieve higher digital data rate, the number of bit transmitted per time T (sec) interval can be further increased by increasing the number of levels used References Behrouz A. Forouzan , Data communications and Networking H. Stern S. Mahmoud, Communications Systems, Pearson Prentice Hall, 2004, p283) http://engineering.mq.edu.au/~cl/files_pdf/elec321/lect_mask.pdf http://en.wikipedia.org/wiki/Amplitude-shift_keying (Accessed 06 December 2012) http://en.wikipedia.org/wiki/QAM_tuner, 2012 (Accessed: 28 November 2012) http://turboblogsite.com/quadrature-phase-shift-keying-qpsk-modulation.html http://www.radio-electronics.com/info/rf-technology-design/pm-phase-modulation/8qam-16qam-32qam-64qam-128qam-256qam.php (Accessed 06 December 2012) http://www.radio-electronics.com/info/rf-technology-design/pm-phase-modulation/what-is-psk-phase-shift-keying-tutorial.php (Accessed 06 December 2012) Ian A. Glover and Peter M. Grant, Digital communications, second edition Intuitive Guide to Principle of Communication, www.complextoreal.com Margaret Rouse, July 2005 Merriam Webster N.Vlajic, Instructor, CSC 3213, fall 2010. Analog transmission of digital data (ASK, FSK, PSK, QAM) Wikipedia, the free encyclopaedia (Accessed: 28 December 2012) www.encyclopediapro.com/mw/modulation (Accessed: 28 November 2012)

Impact of British Colonization on Kenya

History Russell McGillivray Kenya The British colonization of Kenya destroyed the culture and economy of the native people, but it established a democratic government and left Kenya a more modernized country. [1] During the 1880’s through 1914, the start of WWI, was an age of imperialism. One place that felt victim to this imperialism was Africa. At this time Africa was a wholly unmodernized continent. The reason the Europeans went after Africa was the introduction of the idea of social Darwinism and the â€Å"white man’s burden†. Social Darwinism is the belief that only the strongest and the most cunning can make it to the top of the social ladder, and it was the White Man’s Burden to step in for these undeveloped countries and lead the Africans for them. So the European powers set out taking all of Africa piece by piece until the start of WWI. After this period there were only 4 African countries left independent, compared to a modern day 50 countries. [2] Britain was one of the most powerful countries at this time and took tons of land all over the world for trading and exports. 3] Kenya is a country founded on over 70 different cultural groups,[4]and each one has their own language and cultural traditions. When the British came into Kenya, they knew very little to none of the culture of the Native Kenyan people. [5] This of course led to numerous problems between the two peoples. One of the biggest problems created was how much land the British took. The Massai people lived in the rift valley, and w ere a nomadic tribe. When the British came in, they figured that the land that the Massai weren’t living in, wasn’t being used and took it for themselves. 6] Because of this, the Massai could no longer live their nomadic lifestyle and were forced to move to the cities, primarily Nairobi. [7] This overpopulated the city and led to mass homelessness and unemployment,[8] and therefore these people could no longer pay the British taxes. The British took advantage of this and employed these people to work on streets and railroads. [9] As the British took more land, more natives were forced to move to the city. So the British began to employ these people to work on their farms. Due to all these changes, the economic state of the country changed from one where everyone had a home and job in their own tribe and enjoyed fairly good standards of living, to one driven by foreign consumerism and trade. [10] These economic disruptions were not the only result of the settler’s lack of knowledge of the Kenyan People they had a profound Social effect as well. [11] When the British first came they were afraid of two things of the Kenyans. [12] Firstly they thought that the Kenyan people were savage and, without supervision and control, would resort to fighting over the slightest problem. 13] They also feared that the Kenyan people may unite against the British and repel them form the country. [14] To prevent either of those from happening, they established â€Å"Tribal Boundaries†. These boundaries separated each tribe into their own separate province or district, which was easier to manage and watch over. These boundaries had a more dramatic effect that the British could know. [15] Before the British came the economy was mostly agricultural, with a few tribes taking jobs as merchants allowing trade between the tribes. 16] With these Boundaries in place, no Kenyan was allowed to cross any border without accompaniment of a white man. [17] This prevented most, if not all, of the normal economy the native Kenyans had. Without the other tribes to trade with, the individual tribes had to become more self sufficient and focus more on having enough food to survive, than worrying about the British. [18] People that couldn’t get any land, or failed at farming had to work on British civil works project, and on their plantations and in their mines. Despite all the negative impacts that the British colonization had, there were undoubtedly some benefits Kenya gained. There are some obvious ones, such as improved transportation via streets and railroads, and established trade routes with other countries. Other than those though, there were some major contributions made that still effect the country today. One such contribution was the Lyttleton Multiracial Constitution,[19] which was imposed after the Mau Mau crisis, as a way to appease the kikuyu rebels. This constitution was the first step on the way to establishing a better relationship between the natives and the settlers. [20] This constitution, created by the British, established a council, made up of legislators elected by all the people of Kenya, which would make decisions on the future of the country. This was established because the numerous cultural groups of Kenya had trouble agreeing on decisions for the country, as each tribe wanted changes to better their own tribe. The British established this to help the native Kenyan people, instead of taking advantage of them. This went a long way toward bettering the relationship between the two peoples. 6 years later the Macleod Constitution was established. This created an African majority in the council that gave the Kenyan’s more power over the Settlers. It also gave each tribe a share of the power in the council, much like the state representatives we have in our congress; each tribe had a different share of the power based on size. The tribes with more people had more representatives in the council, and therefore more power. With these two constitutions, the Kenyan people were well on their way to becoming an independent nation. 21] Even after all the work the Europeans had done to try to establish an orderly government in Kenya, only 4 years after it was established a Tyrant took over and dominated the country up until we know it today. After Kenyatta died, Daniel Arap Moi took his place as president. At this time the constitution was weak and at its most basic level. Moi took advantage of t his as established himself as ruler for life of Kenya. [22] There were multiple attempts both at his life, and his positions as president, but none were ever successful. Only in 2002 did his reign end, with the election of Mwai Kabaki. Mwai improved the country a great deal in all areas of life. [23] He established trade routes with other countries, and welcomed foreign investment. By 2004 he had raised over $1 billion (American dollars). Unfortunately, the amount of money invested in Kenya has gone down as more countries begin to invest more into Uganda and Tanzania. [24] Today, Mwai Kabasi still rules as president of Kenya. 20† Mau Mau Uprising Creats Havoc in Kenya, October 20, 1952. † 2003 in History Resource Center, database on-line, Gale Group. Bibliography: †¢ â€Å"Kenya: Peoples and Cultures. †Ã‚  Encyclopedia of Africa South of the Sahara. 4 vols. Charles Scribner's Sons, 1997. Reproduced in History Resource Center. Farmington Hills, MI: Gale. http://galenet. galegroup. com/servlet/History/ †¢ â€Å"Kenya. †Ã‚  Worldmark Encyclopedia of the Nations. 12th ed. Detroit: Thomson Gale, 2007. Reproduced in History Resource Center. Farmington Hills, MI: Gale. http://galenet. galegroup. com/servlet/History/ †¢ â€Å"Mau Mau Uprising Creates Havoc in Kenya, October 20, 1952. †Ã‚  DISCovering World History. Online Edition. Gale, 2003. Reproduced in History Resource Center. Farmington Hills, MI: Gale. http://galenet. galegroup. com/servlet/History/ †¢ Page, E. Melvin. â€Å"Kenya (British East Africa Protectorate). † In Colonialism: an international, Social, Cultrual, and Political Encyclopedia, vol 1, 312-313. Santa Barbara, CA: ABC CLIO, 2003 †¢ Berman, Bruce. Control & Crisis in Colonial Kenya: The Dialectic of Dominion. London: Villes Publication, 1990 †¢ Elkis, Caroline. Imperial Reckoning: The Untold Story of Britain’s Gulag in Kenya. New York: Henry Holt and Company. 2005 ———————– 1] â€Å"Kenya: Peoples and Cultures. †Ã‚  Encyclopedia of Africa South of the Sahara, 1997 in History Resource Center, database on-line, Gale Group. [2] Mau Mau Uprising Creats Havoc in Kenya, October 20, 1952. † 2003 in History Resource Center, database on-line, Gale Group. [3] Ibid [4] â€Å"Kenya: Peoples and Cultures. †Ã‚   Encyclopedia of Africa South of the Sahara, 1997 in History Resource Center, database on-line, Gale Group. [5] â€Å"Kenya: Peoples and Cultures. †Ã‚  Encyclopedia of Africa South of the Sahara, 1997 in History Resource Center, database on-line, Gale Group. [6]Ibid 7]Ibid [8] â€Å"Kenya. † Worldmark Encyclopedia of the Nations. 2007 in History Resource Center, database on-line, Gale Group. [9] Mau Mau Uprising Creats Havoc in Kenya, October 20, 1952. † 2003 in History Resource Center, database on-line, Gale Group. [10] Ibid [11] â€Å"Kenya: Peoples and Cultures. †Ã‚  Encyclopedia of Africa South of the Sahara, 1997 in History Resource Center, database on-line, Gale Group. [12]â€Å" Kenya: Peoples and Cultures. †Ã‚  Encyclopedia of Africa South of the Sahara, 1997 in History Resource Center, database on-line, Gale Group. [13] Ibid [14] â€Å"Kenya. Worldmark Encyclopedia of the Nations. 2007 in History Resource Center, database on-line, Gale Grou p. [15]â€Å" Kenya: Peoples and Cultures. †Ã‚  Encyclopedia of Africa South of the Sahara, 1997 in History Resource Center, database on-line, Gale Group. [16] Mau Mau Uprising Creats Havoc in Kenya, October 20, 1952. † 2003 in History Resource Center, database on-line, Gale Group. [17] â€Å"Kenya: Peoples and Cultures. †Ã‚  Encyclopedia of Africa South of the Sahara, 1997 in History Resource Center, database on-line, Gale Group. [18]â€Å" Kenya. † Worldmark Encyclopedia of the Nations. 007 in History Resource Center, database on-line, Gale Group. [19] Mau Mau Uprising Creats Havoc in Kenya, October 20, 1952. † 2003 in History Resource Center, database on-line, Gale Group. [20] [21] â€Å"Kenya. † Worldmark Encyclopedia of the Nations. 2007 in History Resource Center, database on-line, Gale Group. [22] â€Å"Kenya: Peoples and Cultures. †Ã‚  Encyclopedia of Africa South of the Sahara, 1997 in History Resource Center, database on-line, Gale Group. [23] â€Å"Kenya. † Worldmark Encyclopedia of the Nations. 2007 in History Resource Center, database on-line, Gale Group. [24] Ibid

Gandhi, Martin Luther King, And Mandela: What Made Non-Violence Work Essay

The history of violence in the world is well documented. However it is also possible to use non-violence to bring about change. This DBQ will look at two countries where a non-violent movement was successful. India and South Africa were two important nations on two different continents. But although they looked strong on the outside, each one suffered from a disease that threatened the health of the whole. For India, the disease was colonization. For South Africa, it was racial segregation. In each of these nations three conditions help explain why non-violence worked. The first condition was that both of them had been colonies of England. And like England both countries thought law was very powerful, more powerful even than government officials. The second condition was the presence of violence. Without the possibility of a violent revolution, the government might not have been willing to change. The third condition was the presence of a leader, Mohandas Gandhi in India and Nelson Mandela South Africa. Each of these men was so charismatic he could lead his followers to a non-violent victory. Both of them gave their lives to the cause. Gandhi was shot by an assassin while Mandela spent almost twenty-seven years of his life in prison. Mohandas Gandhi, Martin Luther King, Jr., and Nelson Mandela all achieved a revolution and independence in their countries through non-violence. The reason this worked is because the non-violent people would be beaten and killed for doing nothing wrong, this made the attackers look like idiots for killing defenseless people. This would make the attackers realize what they’re doing and they would grant the country independence. The documents provided could be situated into four categories: civil disobedience, self-control, willingness to accept punishment, and embracing the enemy. Document 1 is a letter from Gandhi to Lord Irwin, the English governor in India. The point of view is Gandhi because he is basically telling the governor what his plans of civil disobedience are: Gandhi and the community are going to ignore the Salt Laws and march to the sea to make their own salt. The tone of this letter is very calm and peaceful. Document 2 is an excerpt from Martin Luther King, Jr.’s autobiography along with a photograph of a 1963 sit-in of integration supporters at a lunch counter. The point of view is MLK and the tone of his excerpt is proud because he knows that what  he’s saying is right. This is a good example of non-violence and civil disobedience because the lunch counter was for white people only, and the integration supporters did not fight back at all to the people who may have been throwing stuff at them, pouring stuff on them, or spitting at them. Finally, Document 3 is an excerpt from Nelson Mandela’s book, Long Walk to Freedom, and he is contemplating which tactic to use in order to achieve independence. The tone of this document is just boring because Mandela is simply thinking to himself. After pondering over the situation, he obviously selects the non-violent approach and it works like a charm. An additional document that could be helpful for this category could be a picture of a group of people who are being civilly disobedient and being beaten.

Descriptive And Values Of The People - 1525 Words

Zoroastrianism Alicia Chen, Natalia Bien, Kendra Fort, Jennifer Koo 7th Period. Descriptive/Values of the People: The people that adhered to this religion were the Persians of the Persian Empire that dated from 550 - 330 B.C. and was located from Anatolia and Egypt across western Asia to northern India and Central Asia. The Persian society was patriarchal but the women were seen as very valuable in society and experienced much more equality than any other women of different empires. The economy was mostly based on trade which brought the provinces and the entire empire together and more integrated. Urbanized Zoroastrians governed themselves by councils of notables—partly by inheritance and partly by election. The council managed†¦show more content†¦Some other important values of the people are also shown through the passages that state that the cultivation of the individual and civic virtues of everyone, including women, following the laws and avoiding being dishonest, caring for the poor, and loyalty to the church should be important for every Zoroastrian. Pourandokht was the first queen of Persia and it shows that women had quite a lot of equality and could participate in politics and ruling of the empire. Origin Story: Zoroastrianism was created by a prophet named Zoroaster, or can also be referred as Ahura Mazda, who was also considered the god of the religion. Zoroaster grew up in a polytheistic religion, where they had animal sacrifices and crazy rituals. The Zoroastrianism religion was created where they were against slaves, animal sacrifices, and only believed in one god (Monotheistic), this shows that his cultural influences growing up was a big influence on what he believed in when creating this religion. Zoroastrianism was created during the rise of Persia, when Cyrus the Great conquer the land. A big belief in Zoroastrianism is that he believed a person should have a choice between God and the â€Å"evil spirit s†. Zoroastrianism is one of the oldest religions, it combined the