To fully understand the technical terms and relevant topics related to the project, a literature review was done. In this section, a brief summary of it is presented. Antenna Basics Polarization The polarization of an antenna is described by the time-varying direction of an electromagnetic wave and the relative magnitude of the vector of the electric field. There are three kinds of polarization: linear polarization, circular polarization and elliptical polarization. Linear polarized electric field can possess both horizontal and vertical orientation. Circular polarization has two linearly polarized electric fields with the same magnitude but the phase difference is 90 degree. While, the elliptical polarization has two different magnitude …show more content…
The impedance at the input terminal of the antenna is the area of interest. The input impedance usually depends on frequency. However there are other factors that will affect the input impedance of an antenna, such as its geometry, method of excitation, and the proximity to surrounding environment. Gain Gain of the antenna is the ratio of the power gained in a specific direction of peak radiation to the radiation of an isotropic source. Antenna gain is usually referred as relative gain. It is the maximum power gain density in a given direction with reference to another antenna with known gain in the same direction. If there is no direction indicated, the antenna gain will peak amplitude of the gain value. Antenna’s gain is related to antenna’s directivity and efficiency. For ideal case, the directivity of an antenna equals to 1, indicating no loss. However, in real situation, antenna’s gain is less than directivity. Directivity Directivity relates radiation intensity in a given direction in terms of the average radiation intensity in all directions. D(θ,∅)=U(θ,∅)/U_av =4π U(θ,∅)/P_rad Where D(θ,∅) is the directivity of the antenna U(θ,∅) is the radiation intensity in a given direction (W/unit solid angle) Uav is the average radiation intensity over all directions (W/unit solid
On the 9th of October, Robert Sheldon was found lying on the tainted red grass of Oak Park. The park was described to be “about two blocks square, with a fountain in the middle and a small swimming pool for little kids.” Police investigators ran through a body analysis showing Sheldon was stabbed by a switchblade around two-thirty in the morning. Hours later after the body was found, police went around asking Sheldon’s family and friends. Three kids, who are witnesses say Ponyboy Curtis and Johnny Cade were responsible.
Measure the capacitance of the coaxial cable(*10 probe) 2. Determine Ra and Rb to meet the amplitude and Tau. 3. Connect the circuit as shown in Fig. 2 4. Switch the oscilloscope to 50 kHz square wave, 11 peak-to-peak voltage.
1. Identify the range of senses involved in communication • Sight (visual communication), Touch (tactile communication), Taste, Hearing (auditory communication), Smell (olfactory communication) 2. Identify the limited range of wavelengths and named parts of the electromagnetic spectrum detected by humans and compare this range with those of THREE other named vertebrates and TWO named invertebrates. Figure 1: the electromagnetic spectrum source: www.ces.fau.edu Vertebrates Human Japanese Dace Fish Rattlesnake Zebra Finch Part of electromagnetic spectrum detected ROYGBV (visible light) detected by light sensitive cells in the eye called rods and cones.
Three of Alexander 's grandsons entered the First World War: David and Olive 's fifth son Frank signing up on February 13th 1916 at the age of 21, Alexander Jr. And Ann 's second son, William signing up on April 16, 1916 at the age of 31 and Gordon Cecil second son of James and Lillian on November 1, 1917, aged 22. All three men were described as having blue eyes and brown hair and height of 5 feet 6 to 8 inches tall and deemed fit to fight in the 2nd Central Ontario Regiment. Two great grandsons, Jack, son of Frank the veteran and Ronald son of Charles, fought in the Second World War.
Richard Joseph Daley (May 15, 1902 – December 20, 1976) was an American politician who was the Mayor of Chicago for 21 years (1955–1976) and chairman of the Cook County Democratic Central Committee for 23 years, holding both positions until his death in office in 1976. Daley was Chicago's third consecutive mayor from the working-class, heavily Irish American Bridgeport neighborhood on Chicago's South Side, where he lived his entire life. He is remembered for doing much to avoid the declines that some other "rust belt" cities like Cleveland, Buffalo and Detroit experienced during the same period. He had a strong base of support in Chicago's Irish Catholic community, and he was treated by national politicians such as Lyndon B. Johnson as a pre-eminent
When a bright object flashes across the sky, neighbors on Maple Street are astonished. After the object flashes across the sky strange things begin to happen. The power in their homes goes out and they start to freak out. After this happens everyone is trying to figure out what happened. Then a kid named Tommy gave the idea of aliens which made everyone start accusing each other.
Leonard Peltier’s Innocence Leonard Peltier was a Native American man arrested for supposedly killing two FBI agents on Pine Ridge Reservation of South Dakota. There have been many debates about the integrity of the court cases and the lawfulness of Peltier’s arrest. Many FBI supporters would claim that there were eyewitness accounts and various other pieces of material evidence that show that Peltier was the culprit. However, Peltier supporters would rebut the evidence, saying that the eyewitness accounts aren’t legitimate and the court decision was politically influenced. I will consider both sides of the argument, and show that Peltier’s innocence is evident because the evidence provided against Peltier was falsified and the FBI used disingenuous methods in charging Peltier for murder.
5. Public trials and executions serve as a deterance of deviant behaviors. These sanctions act as a way to set an example and for people to see what will happen to them if they do the same thing, These sanctions can also be seen as reinforcing boundaries. Although public executions and trials in “town square” are not as common in most countries today, the media is utilized to fulfil the same purpose. When there are high profile cases going on in the United States often tmes the full trial and sentancings are televised so that much of society can see what the repercussions are for defying a social norm.
In the following assignment, you are required to answer each of the following: 1. Explain what “proctoring” means and why the UoPeople requires proctored exams. “A proctor is an impartial individual appointed to monitor or supervise a student during their examinations. All students taking proctored exams are required to have a proctor for various reasons: 1. To guarantee proper student verification, that meets the standards of accrediting agencies.
Oscar Peterson was born to immigrant parents descended from the West Indies on the day of August 15, 1925 (“Oscar Peterson Facts”). Oscar Peterson grew up in a poor multi-ethnic neighbourhood in Montreal, Quebec, Canada (“Oscar Peterson: Piano Master”). His neighborhood was mostly a black neighborhood. He found himself surrounded by the jazz culture which started to develop in the early 20th century (“Peterson,Oscar And Friends”). Oscar's father, Daniel Peterson (who worked as a Pacific Railroad porter and also was an amateur trumpeter and pianist), was one of Oscar’s music teacher as a young boy along with his sister, Daisy, who taught him classical piano (“Peterson,Oscar And Friends”).
William Paterson In Philadelphia, Pennsylvania the Constitutional Convention concluded with 38 of the 41 delegates signing the United States Constitution. Among those 38 men was William Paterson of New Jersey. William Paterson came to America from Ireland when he was just years old. His father did well in manufacturing and selling tin goods which allowed William a good education in private schools. He entered the College of New Jersey which is now Princeton at the age of 14.
Thirty miles off U.S. Highway one in the small town of Alston, GA, Alexander Rivera, Jr. found himself interviewing the newly widowed Sallie Nixon in a chauffer outfit as a reporter for the Pittsburgh Courier in 1948. Her late husband, Isaiah Nixon, a turpentine worker and a father of six, had been shot three times on their front porch for voting in the Democratic Primary. Even before the interview, Alexander Rivera knew that a small town faced with the murder of a black man would be enraged and torn by the act of racial violence. Living in the Jim Crow South as a traveling reporter for the Pittsburgh Courier, Alexander Rivera was used to the act of concealing his identity to garner crucial information on trials, lynching’s and murders done to African Americans. “Something told me, I don’t know what the something was to go dressed as a chauffeur” Alexander Rivera explained, “It was easier traveling as a chauffeur because everybody figured that you worked with somebody important”.
“Pretty Boy” Floyd, who was he and what were his crimes. Pretty Boy was one of the famous gangsters in the great depression. He committed various crimes. Charles Arthur Floyd was born on February 3rd, 1904. He was born in Adairsville, Georgia to poor farmers during The Great Depression where nobody had money.
Non-ionising is found at the end of a long wavelength where as ionising radiation is found at shorter wavelength. Regions of the spectrum: • Gamma radiation- ionizing • X-ray radiation- ionizing • Ultraviolet radiation- non-ionizing • Infrared radiation- non-ionizing • Microwave radiation- non-ionizing • Radio waves- non-ionizing 3- A) Lethal Dose Effects 5-20 Possible late effects; possible chromosomal damage 20-100 Temporary reduction in white blood cells 100-200 Mild radiation sickness within a few hours:
4.1 Project Overview This project aims to build a prototype web application to demonstrate how software can help pancreatic cancer patients. The specifications of the prototype will be discussed in this section. 4.2 User types There are mainly three types of users: Member users – these users will have a user profile created on the website and are entitled to participate in forums or chats and avail medical data storage facility to get online consult. They have authenticated user profiles.