Programmable Logic Controllers Free Essay Example, 1000 words

Besides twisted pair and coaxial cables, PLC also uses fiber optic as a communication link. Fiber optic involves pulsing of light signal to carry digital signal over a long distance. It is capable of transmitting more information at a higher speed as compared to copper wires used in twisted pair and coaxial cable. 2 (d) Internal architecture and operational characteristics of the CPU The PLC CPU consists of three major subsystems; Arithmetic and Logic Unit (ALU), Control Unit (CU), and the Registers. It works by fetching instructions from a specified location into instruction registers and decoded by the control unit. ALU is involved with the arithmetic and logic operations of the CPU. The results are then stored in a special memory location. ALU does the mathematical operations such as addition, subtraction and basic logic operations like AND /OR. It’s a collection of logic gates with inputs, outputs and control bits for determining the type of operation to be done. Task 2 (a) Combinational logic systems and sequential logic systems Combinational logic systems are implemented by Boolean and lack memory since their output entirely depends on the input while sequential logic system uses memory and their output not only depends on the input but also the results of the previous input. We will write a custom essay sample on Programmable Logic Controllers or any topic specifically for you Only $17.96 $11.86/pageorder now Sequential logic system uses flip flops thus have states unlike combinational logic system. ___________________________ 2Evans, William Ted. Programmable logic controllers: fundamentals and applications. Champaign, Ill. : Stipes Pub. , 2006. (b) Analogue inputs and word length of digital outputs. Resolution in the conversion of analogue input in to digital output indicates the number of discrete values that can be produced over a range of analog values. Analogue input are continuous and non discrete unlike digital output (c) Convert the decimal number 6481010 Binary: 1111110100101010 Hexadecimal: FD2A Octal: 1764528 (d) Compare the star, bus and ring forms of network In star network topology, there is a central node to which all the other nodes are connected. Failure in one node does not affect the other nodes unless it is the central node. Star topology enables the administrator to centrally monitor all the networked devices via the central hub. Bus topology on the other hand is the least complicated given that it utilizes a single transition media from which the other devices are connected. A major limitation to bus topology is the limited amount of devices that can be networked.

Zeitoun Essay example - 2192 Words

Zeitoun Have you even judged someone on who he or she is or what they looked like? And have you ever had a bad experience or traumatic experience happens and you looked for someone or something to blame, but in reality there was nothing to blame? Well, a natural disaster can be blamed on no one, but in times like that emotions run wild and blame can be put on someone who fits a certain profile. Racism and Hurricane Katrina were two forces that clashed together to create an even bigger problem for the victims. This is caused by an insecurity of the situation at hand. In the book Zeitoun by Dave Eggers, racism and racial profiling is the underlying themes in the story. These themes are also the underlying themes of people who are subjected†¦show more content†¦When the Hurricane was coming his family left for a safer area, but Zeitoun wanted to stay with his house because he worked hard to get where he was. Zeitoun wanted to try to protect his house in anyway possible. After all the damage was done and New Orleans was submerged in water and nearly completely destroyed, Abdulrahman Zeitoun was asked by his wife to leave the area and go to a safer place. But Zeitoun being the person he is, decided to stay and to help out anyway possible. He canoed around helping those who needed it. When Zietoun was at his house after the hurricane and after he had helped all the people that he could help in the town, he decided that is was time for him to also leave the city. Zeitoun was confronted by National guardsmen and taken to a make shift military base. The entire ride he was treaded poorly, handcuffed, and pushed around. When he arrived at the Union passenger station used as a jail, he was told that he was Al-Qaeda and that’s why he was taken. The national guardsmen saw that Zeitoun was of a Middle Eastern culture and took him. There, Zeitoun was experiencing racism without even knowing it. Zeitoun was stripped searched and rectum searched, called racial slurs and treated poorly, but Zeitoun tried to look at the situation as mandatory protocol and not a racial discrimination. The place he was at was given the name â€Å"Camp Greyhound†. At this camp there wasn’t just racistShow MoreRelatedAnalysis Of The Book Zeitoun By Dave Eggers988 Words   |à ‚  4 Pagessummer assignment, we were assigned to read Zeitoun by Dave Eggers, which recounts the story of a Muslim-American man named Abdulrahman Zeitoun who remained in New Orleans during 2005’s deadly Hurricane Katrina. While trapped in the city, Zeitoun paddles in his canoe in the flooded streets aiding those who are in danger; however, Zeitoun is suddenly arrested under accusations of being affiliated with an Al-Qaeda Terrorist Cell. Throughout the novel, Zeitoun is portrayed as a gentle and compassionateRead MoreZeitoun, By Dave Eggers1699 Words   |  7 Pages In the novel, Zeitoun by Dave Eggers, the main character, Abdulrahman Zeitoun, is an immigrant of Syria who stays in New Orleans after Hurricane Katrina and is arrested due to the suspicion of looting, but really is arrested because of his race and how he looks. Zeitoun’s faith and loyalty to his community and home is tested through the many obstacles of Hurricane Katrina and including his religion, racism, and his very own dignity. The author, Dave Eggers who is also the speaker in novel, provesRead MoreZeitoun Essay example973 Words   |  4 PagesTG 1 Valeria Franco April 1, 2011 English 28 Zeitoun Essay Zeitoun By: Dave Eggers After September 11, 2001 I’ve had trouble finding what makes me more angry; the way the authorities handled the hurricane of Katrina or the way the Arabs were treated. I have herd countless stories related to the 9/11 attack and until today I see the way that has affected the lives of many. Through Eggers story, I was able to comprehend more about the tragedy in New Orleans and even though I thought I alreadyRead MoreAnalysis Of The Book Zeitoun By Dave Eggers978 Words   |  4 Pagesassignment, we were assigned to read Zeitoun by Dave Eggers, which recounts the true story of a Muslim-American man named Abdulrahman Zeitoun who remained in New Orleans during 2005’s deadly Hurricane Katrina. While trapped in the city, Zeitoun paddles in his canoe in the flooded streets coming to the aid of those who are in danger; however, Zeitoun is arrested under accusations of being affiliated with an Al-Qaeda Terrorist Cell. Throughout the novel, Zeitoun is portrayed as a gentle an d compassionateRead MoreThe Destruction Of Dignity By Dave Eggers1757 Words   |  8 Pages, Dave Eggers, in his riveting novel Zeitoun retells the story of a New Orleans painter as he finds himself in the city following Hurricane Katrina. Throughout his harrowing journey throughout the aftermath, Eggers exhibits the horrifying results a disaster can have on the dignity of victims. There are countless examples throughout the novel of those who have been dispossessed of their dignity and humanity, and there is no better example than that of Zeitoun himself. Egger’s portrayal of the aftermathRead MoreThe Mistreatment Of The Zeitoun Family1493 Words   |  6 Pages Renowned journalist and author, Dave Eggers, in his famed novel, Zeitoun, recounts the mistreatment of the Zeitoun family in the aftermath of Hurricane Katrina based on their racial and religious profiles in a post-9/11 America. His purpose is to reveal the unwarranted injustices faced by Muslim-American Hurricane K atrina victims through a description of the Zeitoun family’s experiences, in order to educate his readers of the impact discrimination has on emergency response. Eggers adopts a sympatheticRead MoreZeitoun Fight or Flight795 Words   |  3 Pagesit worth risking your life to protect your belongings and property when a Category 5 hurricane is barreling towards your city? Is it right to disregard reports about a storm because in past experiences the news has been wrong? In Zeitoun by Dave Eggers, a man named Zeitoun decides to let his family evacuate New Orleans without him so that he can stay behind and protect his several homes, business, and personal belongings from Category 5 hurricane Katrina. Once the hurricane passes, and he survivesRead MoreZeitoun Rhetorical Essay1440 Words   |  6 Pagesin Zeitoun, shows a story of a Muslim American family living through many challenges. After 9/11 Muslim families, like the Zeitouns, face many problems living in America. Eggers wan ts to inform other Americans on the situation of Muslim living in the United States, present day. People who are uneducated about the Muslim religion need to be informed on how similar lives are of other people all around the United States. These people throw out stereotypes and aim judgments wrongly at the Zeitoun familyRead MoreKaren Eggers s Zeitoun Essay938 Words   |  4 PagesKimberley A. Turner Elizabeth Miossec-Backer WR 121 19 October 2016 ZEITOUN-KATHY In Dave Eggers nonfiction novel Zeitoun, Kathy is an American woman who converts from Christianity to Islam before marrying her Syrian-born Muslim husband, Abdulrahman Zeitoun. Together, they have three daughters and own and operate a painting company in New Orleans. In her earlier years, Kathy found herself divorced with an infant son working fifty hours a week. â€Å"†¦.her life was a struggle, and she was looking forRead MoreSummary Of Dave Eggers s Zeitoun 1028 Words   |  5 PagesDave Eggers, addresses the endeavors of Zeitoun during and after Hurricane Katrina in his book â€Å"Zeitoun.† His goal is to educate the audience about the prejudices and troubles experienced during the disaster. A formal, yet sympathetic tone is used in the book to not only inform the audience about the hardships experienced by Zeitoun, but to also encourage sympathy among the audience. One struggle he focuses on is Islamophobia and how it negatively affects Zeitoun and his family. He shows this through

BABE RUTH WAS A GREAT. Essay Example For Students

BABE RUTH WAS A GREAT. Essay 1. Babe Ruth was a great baseball player. He played on the Yankees and on the Red Socks. I bet you didnt know that, never mind I will tell you later. 2. Babe had a nickname it was ?The Bambino?. Talk about nickname Babe Ruth was not his real name. Well Ruth was his last name but Babe was an another nickname. Babe Ruths real name was George Herman Ruth. Babe was born 1895 and when he was young he loved baseball. He played in his teens for farm teams. He started his career in 1923. 3. What is pretty cool is that Babe played on the Red Socks. Then he got paid to go to the Yankees. He got better every year. He hit more home runs in his career then the whole team hit in two years. Every time that Babe got up to bat they were looking for a home run. 4. Before Babe went to the Yankees his led the Red Socks to many world series. After a few years he led in the most home runs,stolen bases, and batting average. Some of those records still stand. If he was not playing he was announcing. ?Remember when I said you will find out later well this is it?, Babes manager always congratulated him and poured beer on his head. Then in 1948 Babe said goodbye to baseball. Then a few months later Babe said goodbye to life. He died. 5. Thats all I have to say about Babe and his great career. Every year in Yankee stadium they have Babes day . Next time it comes up you should go.

Volcano Mount Vesusius Essays - Volcanology, Mount Somma

Volcano Mount Vesusius Mount Vesuvius is a volcano located in southern Italy, near the bay of Naples and the city of Naples. It is the only active volcano on the European mainland. Vesuvius rises to a height of 1277 m (4190 ft). Vesuvio (Vesuvius) is probably the most famous volcano on earth, and is one of the most dangerous. Mount Vesuvius is a strato-volcano consisting of a volcanic cone (Gran Cono) that was built within a summit caldera (Mount Somma). The Somma-Vesuvius complex has formed over the last 25,000 years by means of a sequence of eruptions of variable explosiveness, ranging from the quiet lava outpourings that characterized much of the latest activity (for example from 1881 to 1899 and from 1926 to 1930) to the explosive Plinian eruptions, including the one that destroyed Pompeii and killed thousands of people in 79 A.D. At least seven Plinian eruptions have been identified in the eruptive history of Somma-Vesuvius (1). Each was preceded by a long period of stillness, which in the case of the 79 A.D. eruption lasted about 700 years. These eruptions were fed by viscous water-rich phonotitic to tephritic phonolitic magmas that appear to have differentiated in shallow crustal conditions. They are believed to have slowly filled a reservoir where differentiation was driven by compositional convection. A minimum depth of about 3 km was inferred for the top of the magmatic reservoir from mineral equilibria of metamorphic carbonate ejecta (2). Fluid inclusions ([CO.sub.2] and [H.sub.2]O-[CO.sub.2]) in clinopyroxenes from cumulate and nodules indicate a trapping pressure of 1.0 to 2.5 kbar at about 1200 [degrees]C, suggesting that these minerals crystallized at depths of 4 to 10 km (3). The differentiated magma fraction was about 30% of the total magma in the reservoir, and a volume of about 2 to 3 [km.sup.3] was inferred for the reservoir (4). The magma ascent to the surface occurred through a conduit of possibly 70 to 100 m in diameter (5). A thermal model predicts that such a reservoir should contain a core of partially molten magma (6) that can be detected by high-resolution seismic tomography. The earliest outcropping volcanic deposits date back to about 25,000 years ago. The lavas observed at a -1125 m bore-hole are about 0,3-0,5 million years old. It is known for the first eruption of which an eyewitness account is preserved, in 79 AD. Geologically, Vesuvio is unique for its unusual versatility. Its activity ranging from Hawaiian-style release of liquid lava, fountaining and lava lakes, over Strombolian and Vulcanian activity to violently explosive, plinian events that produce pyroclastic flows and surges. Vesuvius is a complex volcano. A complex volcano is an extensive assemblage of spatially, temporally, and genetically related major and minor [volcanic] centers with there associated lava flows and pyroclastic flows. Vesuvius has a long history. The oldest dated rock from the volcano is about 300,000 years old. It was collected from a well drilled near the volcano and was probably part of the Somma volcano. After Somma collapsed about 17,000 years ago, Vesuvius began to form. Four types of eruption have been documented: a) Plinian (AD 79, Pompeii type) events with widespread air fall and major pyroclastic surges and flows; b) sub-Plinian to Plinian, more moderately sized eruptions (AD 472, 1631) with heavy tephra falls around the volcano and pyroclastic flows and surges; c) small to medium-sized, Strombolian to Vulcanian eruptions (numerous events during the 1631-1944 cycle, such as 1906 and 1944) with local heavy tephra falls and major lava flows and small pyroclastic avalanches res tricted to the active cone itself. The fourth type it is the smallest of all eruption types observed at Vesuvio. It is the persistent Strombolian to Hawaiian style eruption that characterizes almost all of an eruptive sub-cycle, such as was the case during the period 1913-1944. Activity of this kind is mainly restricted to the central crater where one or more intracrateral cones form, and to the sides of the cone. Lava flows from the summit crater or from the sub terminal vents extend beyond the cone's base. A somewhat particular kind of persistent activity is the slow release of large amounts of lava from sub terminal fractures to form thick piles of lava with little lateral extension, such