Twisted pair cable Essay Example

Twisted pair cable Paper difference methods of electronic communication and transmission used. Communication Devices Switches These are mainly used for local area networks (LAN). The reason behind this is that they can be used to bridge a lot of computers together. They do look like hubs but they can vary in speed. They are more intelligent due to the fact that they can send out packets from a set port. There is advantage of using a network switch, they can be used with an Ethernet cable or a fibre optic cable and they still will work perfectly fine. When connecting a router or a server in an LAN or WAN network it is slightly easier because you would just need one cable which would mostly need to a fibre optic cable, so you can get the maximum rate of transfer speed. Routers They are mainly used for connecting one network to another. They are meant for handling information and forwarding to another network connected to the router. You can either connect using wireless or a cable. We will write a custom essay sample on Twisted pair cable specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Twisted pair cable specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Twisted pair cable specifically for you FOR ONLY $16.38 $13.9/page Hire Writer Normally an Ethernet cable is used to connect the computer networks. Hubs Also known as a concentrator or a multiport repeater. Used in a star or a hierarchical network setup to connect the station or the cable segments. There are two main types of hubs: passive active. Active takes the incoming traffic, amplifies the signal and then forwards it all the ports. In a passive hub it simply divides the incoming traffic and forwards it. A hub can be used to manage and allow individual port configuration and traffic. Hubs operate on the physical layer of the OSI model and they are protocol transparent. This means that they do have the ability to set upper layer protocols such as IP, IPX or a MAC addresses. Hubs just extend them do not control the broadcast or collision domains. Bridges Used to increase the performance of a network by dividing it into separate collision domains. Even though they are more intelligent than hubs due to the fact that they operate at the Data Link layer of the OSI model, they still are not able to control the upper layer protocols. On a separate segment they store the MAC addressing table of all nodes. Basically it takes the incoming frames and checks the destined MAC address and lookups it up against the store MAC addressing table and decides what to do. If the frame is comes from the same port as the destined port than it simply discards the frame. If the destined location is not known than it will be flooded throughout the outgoing ports and segments. Repeaters -One of the less complex hardware of the networking world, because it basically runs at the physical layer of an OSI model, so it is not aware of the frame formats and upper layer protocols. Repeater basically is used to expand a LAN network over large distance regenerating a signal. When using a repeater remember the 5-4-3 rule which means that a maximum distance between two hosts on the same network is 5. Use only maximum of 4 repeaters in a network and only 3 segments can be populated. Gateways Very intelligent devices, they work at the Transport Layer protocol. This is higher than the Upper Layer protocol. This means that can manage and control IP, IPX and MAC addressing. They allow IPX/SPX clients to IP/TCP uplink network to connect to the internet. A gateway in simple terms is like a post office. All the information is sent to it and then as a post office knows the number of houses in the area in the same way a gateway would know all the ports and direct it there. Cell Phones It is a piece of device which is used by a lot of people. It is a portable version and more advanced version of a normal home phone. It lets you voice calling, text messaging, the some other advanced phones even allow video calling and internet browsing. Cell phone is a full duplex device therefore you can connect it to your computer and use it as a modem even though it would be very slow. The newer released phones are somewhere near capable of the proper modem speeds. DCE DTE devices Data Communication Equipment (DCE) is basically equipment which allows communication with a Data Terminal Equipment (DTE). In another words DTE ends the communication line and a DCE provides the path of communication. An example of an DCE is an modem and a computer is a DTE. Fax Machine A device which allows you to send paper copies using PSTN lines to other people. It can also be used to send memos and other information as well. It uses the phone line to transmit the data that is sent. A fax machine has a sensor to read the data and the end of it. It will encode the black and white that it picks on the paper and moves it to the receiving end. It will compress the data before transmitting it. As soon as it receives the data it decodes and decompresses the data so it can arrange it in the way that it scanned it from the original document. There are a lot of things in a fax machine that allow it to do its function. It consists of a source projecting a light beam, a rotating cylinder and a photo electric cell. It also has paper feed like a printer. E-Mail Email also which is the short form for electronic mail. You can use e-mail to stay in contact with your friend/family even colleagues. It does it by finding out the person you want to email hes email address and then you will send him an email and click send and then that person will receive it. Signal Theory When talking about signal theory data is represented by digital format which is dependent on binary or base 2 principles. Analogue and digital frequencies are used for transmitting signals along a medium link. Analogue records the waveform as they are. Digital on the other hand turns the analogue signals normally to sets of number. Analogue signals can have varying amplitude and frequency. Amplitude analyzes the loudness of the signal and Frequency determines the pitch of the signal. Pitch mostly used to refer to low and high notes. If the frequency is lowered than you get a low note and if the opposite is applied than you get a high note. Bit is a binary digit which represents value of 0 which is normally off and 1 which is normally on. Bit can also be referred to as a electrical pulse which is generated by the inner clock in the control unit or data register. Bit can also be used for digital electronics which is another system that uses digital signals. Manipulation of a bit within the memory of a computer can be kept in a steady level on a storage device as a magnetic tape or disc. Byte which is made up of 8 bits is a unit measurement used for information stored on a computer. Synchronous Asynchronous Communication To sum up synchronous communication it is when interaction with data takes place it is done in real time. On the other hand asynchronous or delayed communication is when any data which is archived or stored and accessed later. It is important to choose the most effective delivery mode because it directly impacts the level of interaction that is going to take place. Synchronous It does not use start or stop bits but instead it synchronizes the transmission speed with receiving and sending end of transmission using the clock signals specifically built for each of the components. After this constant streams of data are transmitted between two sources. Because no start or stop bits are involved data transmission is faster, but more problems occur because if latency takes into effect then the synchronization clock will be out of timing therefore the receiving node will get the wrong timings that have been acknowledged in the protocol sending and receiving data. If this happens then data can be corrupted, missing or even wrong message. There are ways around this which take time. You could use check digits and re-synchronize the clocks so that you can verify that the transmission has been successful and has not been interrupted. Advantages of using synchronous transmission are that lower overhead and more data can be transmitted and data transmission rates are also faster. The drawbacks of using synchronous transmission is obviously more prone to problems, it is more expensive and more complex. Asynchronous Opposite to synchronous it uses start and stop bits to mark the start and end of a transmission, this means that 8 bit ASCII characters would be transmitted using 10 bits because the use of start and stop bits. For example (1)10111111(0) the bracketed out one and zero at the start and end mark the start and end of a transmission. This tells the receiving either the first character is transmitting or finished transmitting. This method of transmission is normally used when data is sent occasionally as opposed to in solid stream. Benefits of using asynchronous data is that it works out cheaper because timing is not that important and it is also simple because both end do not require synchronization. Drawback are that if a large amount of data is to be transmitted it would take a long time this is because a lot of bits are only for control uses they do not contain any useful information. Bandwidth is used to define how much volume a medium can transmit. Basically it is the maximum rate at which data can be transmitted across mediums. The more bandwidth a wire can handle the higher transmission rates can be achieved. It can also high transmission rates for multiple users. But there are restrictions in place such as if a user has been transmitting a lot of data between a period of time then a temporary limit will be put on. This is quite common with ISPs. To stop this happening to you best thing to do is not to download a lot at the same time and also close programs which use the bandwidth continuously. Radio Transmission Radio is a way of transmitting signals using varied tones which convey a message of electromagnetic waves with a frequency. Electromagnetic radiation travels in direction of oscillating electromagnetic fields which go through the air and vacuum of space. Changes in radiated waves such as amplitude, frequency or phase allow information to be carried systematically. If the radio waves pass through electrical conductors the oscillating fields induce an alternating current in the conductor. This could be detected and changed into sound or any other type of signal which is able to carry information. Every radio system has a inbuilt transmitter this is the source which allows electrical energy that produces a alternating current of a desired frequency of oscillation. The inbuilt transmitter also has a system which changes some properties of the energy produced to impress a signal on it. This change could be as simple as turning the signal on or off. Change could be more complex such as alternating more subtle properties such as amplitude, frequency, phase or combination of all three properties. The modulated electrical energy is sent via the transmitter to an antenna. Antenna changes the alternating current electromagnetic waves; this allows the waves to transmit in the air. There are drawbacks of using radio. First is attenuation can happen, this basically means the longer the wave has travelling to get to its destination the more weaker it gets. Most obvious example of this would be someone listening to FM radio in the midlands; the further he goes away from the midlands the more signal gets weaker. Microwave An electromagnetic based wave which has a range or wavelength of up to 30 GHz. Currently microwaves are getting more popular due to advancing technologies. Microwave offers high bandwidth at low cost. Most common problem with microwave transmission is reflection. Microwaves are common used for radar which pickup planes and helicopters flying in the air. Microwaves will hit the plane or helicopter and reflect back and gets calculated giving the position of the flying object. Waves are reflected due to a barrier which stops the wave from going further so it hits the barrier and reflects back. Reflection affects the signal if the reflection is not good then the reflection wont happen therefore a dead or a blank signal will be received. To minimize the effect try staying close the satellite. Wireless protocols such as Bluetooth use microwaves to transmit. Satellite Satellite is a orbiting piece of hardware which has been left floating in the air from big companies like Microsoft, satellite can be used for communication. There are also other types of satellites which are used for spying or used for online maps such as Google maps, Microsoft live maps or another services. Satellites provide high bandwidth solutions. Satellite is categorized as a WAN because it uses high speed long distance communication technology which allows them to connect to computers. Attenuation also affects satellite connection due to the same reason. If a satellite is not in the required position and starts transmitting signal it will not reach television so they might not work properly or correctly. Satellite dish has to be in the same direction as the satellite. Satellite signals reach television using a transmission antenna which is located at an uplink facility. The facility has an uplink satellite dish which would be around 9-12 meters in diameter. The bigger the diameter of the satellite the more accurate signals and better signal strength from the satellite is received. The satellite dish would be pointed towards the satellite and the uplinked signal is received by the transponder at a certain frequency. This frequency is normally C-band (4-8 GHz) or KU-band (12-18 GHz). The transponder then retransmits the signal back to the earth. NTSC, PAL or SECAM are three broadcast standards used through out the world. NTSC is normally used in the US, Canada, Japan, Mexico, Philippines, South Korea and other countries. PAL which stands for Phase Alternating Line is an colour encoding system which is used by over 120 countries in the world. In a few years time most of the countries will stop using PAL and either change to DVB-T SECAM It is sequential colour with memory is the analogue colour television system. SECAM was Europes first colour television standard and France currently uses it. The analogue signals for the three broadcasting types are transmitted via a satellite link scramble or unscramble. The analogue signal is a frequency modulated and transformed for a FM to something called baseband. The baseband fuses the audio and video sub carrier. The audio sub is further demodulated to provide a raw audio signal. Digital TVs that transmit via satellites are normally based on open standards such as MPEG and DVB-S. MPEG which stands for Moving Pictures Experts Group is a compressed format which code moving pictures and associated audio information. There is also MPEG 2 which is a digital television signal which is broadcasted via terrestrial cable and direct broadcast satellite TV systems. DVB-S which stands for Digital Video Broadcasting is a standard for satellite TVs which forward error coding and modulation. It is used by every single satellite that serves a continent. Standards Organizations There are difference types of standard organizations. These are the various types of standard organizations TIA/EIA, RS-232, IEEE, ISO, OSI and Manchester Encoding. ISO/OSI International Standards Organizations Open System Interconnect (ISO/OSI) is the standard model for networking protocols and distributed applications. ISO/OSI defines seven network layers. 1. Physical 2. Data Link 3. Network 4. Transport 5. Session 6. Presentation 7. Application I will be only be explaining in-depth the first network layer: Physical. This layer defines what cable or physical medium to be used. There are lots of different types of cable thinnet, thicknet, TPC, UTP. All of these mediums are functionally the same. The major difference between the various cables is the cost, convenience, installation and maintenance. Converters from one media to another operate at this level. TIA/EIA Telecommunications Industry Association Electronics Industries Alliance (TIA/EIA), state the standards which should be used laying cables in a building or a campus. TIA/EIA describes how a hierarchical topology should be laid out. A system where a main cross connect system is used and connected using a star topology using a backbone cabling through a intermediate or a horizontal cross connect. This type of cabling or similar is also used for laying out telecommunication cables. The backbone cabling method will be used to connect the entrance facilities to the main cross connect. In areas such as office a horizontal cross connect for the consolidation of the horizontal cabling, which extends into a star topology. Maximum stated horizontal cable distance should anywhere between 70M-90M. This applies to TTP (Twisted Pair Cable), but the fibre optic horizontal cabling has a set limit of 90M. IEEE Institute of Electrical and Electronics Engineers allows the development of Electro Technology which in other words applies to electricity applied to technology. Societies like the IEEE Computer Society are subsidiaries of the IEEE itself. This standards organization also publishes journals. Devices such as digital camera need set amount of bandwidth speed so it uses a IEEE plug. Any device that uses the IEEE standard uses a twisted pair cable. Signalling Standards NRZ- It stands for Non Return to Zero. It is a binary code normally used for slow speed synchronous and asynchronous transmission interfaces. Ones is represented as a small voltage and zero is negative voltages. They are transmitted by either by set or constant DC voltages. It also uses additional synchronisation so it dose not lose any bits in the process. NRZ-L Non Return to Zero Level is similar to NRZ, but it not a binary code. Same as NRZ one is represented as small voltage, but zero is also represented as a small voltage but it is not as big voltage as one, Therefore it allows more data to be send without a lot of signal change. NRZ-M Non Return to Zero Mark again similar to NRZ, but one is actually represented by a change in physical state and zero is represented as change in physical state. This basically means that there is no voltage when there is no change in physical state. RS-232 This standard applies to serial data transfer such as the 9 pin serial connecters which are commonly used on a computer motherboard. The data is sent in as time series of bits. Synchronous Asynchronous is both supported by this standard. This standard and states the number of control circuits that can be or need to be used to connect the DCE DTE terminal with one another. Data and control circuits which are signalled from a DTE connected to a DCE or vice versa will always flow and operate in one direction this is called half duplex. Only full duplex allows data to be sent and received in both directions at the same time. Manchester Encoding Data bits which are represented by transitions from a logical state another is called Manchester encoding. This is a digital type encoding. In this encoding the signal is self clocking because the length of every data bit is set by default. Depending on the transition direction the state of the bit can be analyzed.

Judith Not Wright essays

Judith Not Wright essays Judith Wright is a respected Australian poet is also known as a conservationist and protester. Her poetry has captured the most amazing imagery of Australian Culture. For Australian students to understand their own culture and history it is necessary to study the best poetry and Judith Wrights poetry is definitely some of the best. Her achievement in translating the Australian experience into poetry led in her best work to a rich inheritance of lyricism and directness. Through stories told by older workers on the property she learnt of the pioneers' part in both the destruction of the land and the dispossession and murder of the aboriginal people. The sense of fear she felt at invasion enabled her to understand, at some level, how the Aborigines would have felt. Judith Wright wrote about many things in her poems, which are necessary for Australian students to be taught which apply to learning about Australia. Australian culture is something Judith wrote about very strongly and this shows through her poem Bora Ring. Bora Ring is about the Aborigine culture and how it has been lost by the invasion of Europeans. The hunter is gone: the spear is splintered underground; the painted bodies a dream the world breathed sleeping and forgot. This is an incredible paragraph extracted from Bora Ring. This poem depicts perfectly of the European invasion of Australia. It shows how the traditions and stories are gone, how the hunting and rituals are gone and lost in an alien tale, the Europeans being the aliens. This poem also describes that it seemed as if the tradition of Aborigines was breathed sleeping and forgot. These are powerful words Judith Wright used to show how they Aborigines were quickly invaded and forgotten. This poem is an excellent example of why Australian students should study her poetry. Australian relationships are depicted per ...

Chinatown and Leicester Square in Light of Ethnographic Analysis Essay

Chinatown and Leicester Square in Light of Ethnographic Analysis - Essay Example Over time, the larger part of the Chinese minority in London came to be concentrated in the Limehouse district, in an area known as Chinatown these days. Swarming with gambling dens and opium dens, it used to be perceived as a place with high rates of crime, violence and haplessness by the majority of London inhabitants at the time. Nevertheless there is no doubt it did promote economic prosperity. Leicester Square derives its name from Robert Sidney, second Earl of Leicester, born in 1595, who acquired land in the area for his housing development project in 1630 and 1648. In its early times the area was a residential place for prominent foreigners such as artists and craftsmen and also ambassadors and royalty. The 19th century saw the boom of cafes, entertainment and clubs. To all this, cinema was added early on in the 20th century, competing against and eventually gaining prevalence over other forms of entertainment. The movie sector remains strongly tied-up with the place up to this day. (Sheppard, 1966). In 2002, the City Council adopted the Leicester Square Action Plan, following widespread public consultation (Westminster City Council, 2009). Present condition It is interesting to note that while the Chinese community is open to all influences of the country they are living in, yet they do not appear to lose the distinct characteristics of their own culture. Distinctive marks of that culture are felt in architecture, design, behaviour and in nearly ever every item of daily usage. In 2005 the property development agency Rosewheel ran by Richard Bowen announced plans to redevelop the western portion of Chinatown to make it still more suitable for tourism and for leisure activities, such as dining out. As part of the plan, roads are to be pedestrianized and shop fronts extended into the roads so as to transform the place into something new, thus bringing another kind of businesses into the picture. As is apparent from their reactions, the present property owners and tenants in the area feel strongly opposed to the prospected changes, as some of them would get evicted, while others fear the expected rise of rent in the area. Approximately 20 local businesses are going to close and 200 people lose their jobs in the process. That is why the Chinese community took defensive action, citing community figurehead Jabez Lam on their website, who says he believes that "Rosewheel is determined to put hundreds of shopkeepers and employees out of work. [The redevelopment] w ill break up the social fabric of those working, living and visiting the area." (DimSum, 2009). Chinatown derives substantial benefits from the grey economy, as evidenced by Paul Kingsnorth in his Guardian article: "Jabez wants to show me something. He walks me around the corner to Gerrard Street, where he points to a dingy staircase. To one side is a red plaque with gold Chinese lettering on it. 'This used to be a brothel,' he says with a slight smile. 'Now

Sociology Paper Essay Example | Topics and Well Written Essays - 750 words

Sociology Paper - Essay Example In the reading, â€Å"making sense of the senseless: understanding genocide†, the authors begin with a statement that solidifies their greater purpose. That is, â€Å"all genocides are horrific, but not all genocides are the same. they can arise from cold-blooded calculations, realistic fears instincts for revenge, or ideologies of purification. understanding-and perhaps forestalling- genocide requires clear distinctions,† (Chirot & Edwards, p.406). A clear distinction to be made would be that, while genocide and the wars that come about are horrid, their root causes can differ to varying degrees, by what caused them in the first place. The inner meaning of the text, as written by Daniel Chirot and Jennifer Edwards, is to consider the frightening human atrocities of such events as the ethnic cleansing in Yugoslavia in the 1990s, as well as the extermination of the Jewish people during World War II, along with Rwanda, but to look at them through the means in which they were initiated. â€Å"The inevitable comparisons of these recent atrocities to those of the past, most notably the Holocaust, are highly controversial. Classifying an event as a genocide can be used to legitimate the claims of survivors or as justification for reprisals against perpetrators. Therefore, several questions about genocide should be considered: (1) How successful does an attempted â€Å"cleansing† of a group need to be to warrant classification as genocide? (2) Does a certain number or percentage of a population need to be killed? (3) Does the intent of the perpetrators make any difference? (4) Should the term genocide be reserved for the murder and expulsion of religious or ethnic minority groups or can political dissidents or enemies in war be victims of genocide?† (Chirot & Edwards, p.406). The subjective facts listed within the article would be the tendency of many to want to classify any form of

Measuring Processes of Pipelining

Measuring Processes of Pipelining Sakshi Dua Abstract Discuss the method to measure the performance of pipelining. Give a space-time diagram for visualizing the pipeline behavior for a four-stage pipeline. Also discuss some way to control a pipeline for collision free operations. Introduction Pipelining: A pipelining is a series of stages ,where some work is done at each stage .The work is not finished until it has passed through all stages.It is a technique used in advanced microprocessors where the microprocessor begin executing a second instruction before the first has been completed Three performance measures pipeline are provided:- Speed-up S(n) Throughput U(n) Efficiency E(n) . Speedup S(n):- Consider the execution of m tasks (instructions) using n-stages (units) pipeline. n+m-1 time units are required to complete m tasks. it is assumed that the unit time T = t units. Speed-up S(n) = Time using sequential processing - Time using pipeline processing = m * n * t (n + m 1)* t = m * n n + m -1 Lim S(n) = n m→∞ i.e. n fold increase in speed is theoretically possible. Throughtput T(n):- Throughtput U(n)= # of task executed per unit time = m - (n + m 1)* t Lim U(n) = 1 m→∞ Efficiency E(n):- Efficiency E(n) = Ratio of the actual speed-up to maximum speed-up = speed-up - n = m n + m -1 Lim E(n) = 1 m→∞ Space Time Diagram For Four Stage Pipeline The behavior of pipeline can be illustrated with space time diagram that the segment or stage utilization as a function of time .The horizontal axis displays the time in clock cycles and the vertical axis gives the segment number.The Diagram shows 6 tasks T1 through T6 executed in 4 segments. Task T1 is handled by segment 1.after the first clock,segment 2 is busy with T1,while segment is busy with task T2.Continuing in this manner,the first task T1 is completed after the fourth clock cycle.From then on,the pipe completes a task every clock cycle. clock I/p s S1 R1 S2 R2 S3 R3 S4 R4 DIAGRAM: FOUR STAGE PIPELINE clock Stage:1 2 3 4 SPACE TIME DIAGRAM FOR PIPELINE For example:- Consider the case where n- stages pipeline with a clock cycle time tp is used to execute m tasks. The first task t1 requires a time equal to ntp to complete its operation since there are n stages in the pipe. The remaining m-1 task emerge from the pipe at the rate of one task per clock cycle and they will be completed after a time equal to (m-1)tp. Therefore, to complete m tasks using a n-stages pipeline requires n+(m-1) clock cycles. For eg. Above diagram shows four stages and 6 tasks. The time required to complete all the operations is 4+(6-1)=9 clock cycles. Consider a non pipeline unit that performs the same operation and takes a time equal to tn to complete each task. The total time required m tasks is mtn. The speedup of a pipeline processing over a equivalent non pipeline processing is defined by the ratio S(n)= mtn (n+m-1)tp As the no. Of tasks increases , m becomes much larger than m-1 and n+m-1 approaches the value of m. Under the condition , the speedup becomes S(n)= tn tp Assume that the time it takes to process a task is the same in the pipeline and non pipeline circuits, we will have tn = ntp including this assumption, the speedup reduces to S(n)= ntp = N tp This shows that the theoretical max. Speedup that a pipeline can provide is n,where n is the no. Of stagessegments in the pipeline. To clarify the meaning of the speedup ratio, let the time it takes to process a suboperation in each segment be equal to tp=20 ns Assume that the pipeline has n stages and executes n =100 tasks in sequence. The pipeline system will take (n+m-1)tp =(4+99)*20 =2060 ns to complete. Assuming that tn=mtp 4*20=80 ns, A non pipeline system requires mntp=100*80=8000 ns to complete the 100 taks. The speedup ratio is equal to the 8000/2060=3.88. As the no. Of tasks increases,the speedup will approach 4, which is equal to the no. Of stages in the pipeline. If assume that tn=60 ns, the speedup becomes 60/20=3. Some way to control a pipeline for collision free operations To avoid the collision in data dependency operation are: Hardware Interlocks It is an interlock circuit that detects instructions whose source operands are destinations of instructions farther up in the pipeline. Detection of the situation causes the instruction whose source is not available to be delayed by enough clock cycles to resolve the collision. This way the program maintains the sequence by using hardware to insert the required delays. Operand Forwarding It uses special hardware to detect a collision and then avoid it by routing the data through special paths between pipeline stages. This method requires additional hardware paths through multiplexers as well as the circuit that detects the collision. Delayed Load It solves the data collision problem to the compiler that translates the high level language into a machine language program. The compiler for such computers is designed to detect a data collision and reorder the instructions as necessary to delay the loading of the collisioned data by inserting no-operation instructions. This way is referred to as delayed load. To avoid the collision in branch instructions operations are: Prefetch Target Instruction This is used to handling a conditional branch is to prefetch the target instruction in the additional to the instruction following branch. Bath are saved until the branch is executed. If the branch condition is successful, the pipeline continues from the branch target instruction. An extension the procedure is to continue fetching instructions from both places until the branch decision is of the correct program flow. Branch Target Buffer The BTB is an associative memory included in the fetch segment of the pipeline. Each entry in the BTB consists of the address of a previously executed branch instruction and the target instruction for that branch. It stores the new few instructions after the associative memory BTB for the address of the instruction . If it is in the BTB,the instruction is available directly and prefetch continues from the new path. If the instruction is not in the BTB, the pipeline shifts to a new instruction stream and stores the target instruction in the BTB. Advantage is that branch instruction occurred previously are readily available in the pipeline without interruption. Load Buffer A Variation of the BTB is the load buffer. This is a small very high speed register file maintained by instruction fetch segment of the pipeline. When a program loop is detected in the program, it is stored in the loop buffer in its entirely, including all branches. The program loop can be executed directly without having to access memory until he loop mode is removed by final branching out. Branch Prediction A pipeline with branch prediction uses some additional logic to guess he outcome of a conditional branch instruction before it is executed . The pipeline then begins refetching the instruction stream from the predicted path. A correct prediction eliminates the wasted time caused by branch penalties. Delayed Branch This is the way to employed in RICS processors is the delayed branch. In the procedure, the compiler detects the branch instruction and instruction hat keep the pipeline operating without interruptions. An example of delayed branch is the insertion of a no operation instruction after a branch instruction . This causes the computer to fetch the target instruction during the execution of the no-operation instruction ,allowing a continuous flow of the pipeline.

Flame of Hope :: Description Essays

Flame of Hope I was walking along Michigan Ave., in Grant Park, when I saw it across the street. I couldn’t take my eyes off it. It was a sculpture entitled Flame of Hope, by Leonardo Nierman. I know I’ve passed by this sculpture before, but I never really paid any attention to it. I don’t know why, but it caught my eye today. Maybe it was the break in the buildings, or the way the sun was reflecting off of it, but for whatever reason I was fixated. The sculpture is in between three buildings, right next to another sculpture. It seems as though the sculptures were placed there to give the people of Chicago something to look at other than buildings. The sculpture is made of shiny, silver, metal and has a very smooth surface. Because of the time of day and the way the sun has been reflecting off the sculpture, its surface is hot to touch. Some parts are hidden from the sun though, and no matter how hard the sun tries, it will never reach those areas. It’s like an unending game of tag where the sun is always it. Standing next to the sculpture, I’m reminded of how little I actually am. It’s a very humbling experience whenever one realizes how little a person really is when compared to the big picture. For some reason, that’s the feeling I got as I looked up at this shiny piece of metal. The flame is made up of several distorted shapes, both large and small, but in some way, they all fit together, like a j igsaw puzzle. All the shapes are not connected though, and there are places where you can look through and see the sky. It’s as if someone took a picture, and for one brief moment, the sky is frozen in time. There are so many angles and curves to this sculpture. It looks as though it's in continual motion; it intertwines within itself. Depending on where you stand, it can take on different shapes and personalities. From across the street, I could see a dancer. Her arms and legs flailing about to the ever-changing beat of the music that has captured her soul. The beautiful dancer is in continual movement; never stopping for a breath, she just keeps dancing. In between the buildings she moves, allowing anyone who wants to stop, to enjoy the show. Flame of Hope :: Description Essays Flame of Hope I was walking along Michigan Ave., in Grant Park, when I saw it across the street. I couldn’t take my eyes off it. It was a sculpture entitled Flame of Hope, by Leonardo Nierman. I know I’ve passed by this sculpture before, but I never really paid any attention to it. I don’t know why, but it caught my eye today. Maybe it was the break in the buildings, or the way the sun was reflecting off of it, but for whatever reason I was fixated. The sculpture is in between three buildings, right next to another sculpture. It seems as though the sculptures were placed there to give the people of Chicago something to look at other than buildings. The sculpture is made of shiny, silver, metal and has a very smooth surface. Because of the time of day and the way the sun has been reflecting off the sculpture, its surface is hot to touch. Some parts are hidden from the sun though, and no matter how hard the sun tries, it will never reach those areas. It’s like an unending game of tag where the sun is always it. Standing next to the sculpture, I’m reminded of how little I actually am. It’s a very humbling experience whenever one realizes how little a person really is when compared to the big picture. For some reason, that’s the feeling I got as I looked up at this shiny piece of metal. The flame is made up of several distorted shapes, both large and small, but in some way, they all fit together, like a j igsaw puzzle. All the shapes are not connected though, and there are places where you can look through and see the sky. It’s as if someone took a picture, and for one brief moment, the sky is frozen in time. There are so many angles and curves to this sculpture. It looks as though it's in continual motion; it intertwines within itself. Depending on where you stand, it can take on different shapes and personalities. From across the street, I could see a dancer. Her arms and legs flailing about to the ever-changing beat of the music that has captured her soul. The beautiful dancer is in continual movement; never stopping for a breath, she just keeps dancing. In between the buildings she moves, allowing anyone who wants to stop, to enjoy the show.

Positive psychology Essay

Positive psychology is literally all about the positive energy within a person. It is an organized attempt to make the most out of it. It is believed by the psychologists that it is preventative therapy instead of it being post illness therapy. Most of the psychologists that believe in this system believe in the glass being half full. It is optimism and happiness that can lead a person to live a better and a fuller life. I believe that action must be taken before it is too late. The effort of professionals in trying to make the world a happy place and to attempt to make a go at it is commendable. It is a very effective method of trying to bring out the positive energy. In the fast changing world of today, materialism and consumerism rule the roost. It is that only that which is making a lot of people unhappy unnecessarily. It is the competition and the need to strive for more. Positive psychology teaches one to be satisfied with what one has. Once that person is happy, he will emit happiness. Happiness, laughter and smiles are all contagious. One smile goes a long way. Many a times it takes just a smile to light up a person’s day. Small changes in ones lifestyles on a daily basis can go about a long way in maintaining a healthy outlook on life. It is important to appreciate the small things in life. One needs to take time out to stop and stare. To be able to smell the flower. To be able to see the ants in the garden. On a more personal level, being more organized can save a person from unnecessary frustration and anger while looking for something. Knowing where to find what can add to the confidence and that’s a small step towards having a good day. In the long term, it is important to remind to oneself, the need for patience and tolerance. A cool mind can handle any problem more effectively and let it affect one much lesser. At the end of the day, positive psychology is all about the ripple effect one person can have on the community. It is the chain reaction caused by the positive energy radiating from one person to the other. It is all about happiness, and sharing. It is truly about being human.