1.
Air show
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An air show, is a public event at which aviators display their flying skills and the capabilities of their aircraft to spectators, usually by means of aerobatics. Air shows without aerobatic displays, having only aircraft displayed parked on the ground, are called static air shows, in the United States, some of the larger airshows are headlined by military jet demonstration teams including the U. S. Navy Blue Angels and USAF Thunderbirds. The Canadian Forces Snowbirds will headline many airshows in Canada and the United States, some air shows are held as a business venture or as a trade event where aircraft, avionics and other services are promoted to potential customers. Many air shows are held in support of local, national or military charities, military air firms often organise air shows at military airfields as a public relations exercise to thank the local community, promote military careers and raise the profile of the military. Air show seasons vary around the world, the United States enjoys a long season that generally runs from March to November, covering the spring, summer, and fall seasons. Other countries often have much shorter seasons, in Japan air shows are generally events held at Japan Self-Defense Forces bases regularly throughout the year. The European season usually starts in late April or Early May and is usually over by mid October, the Middle East, Australia and New Zealand hold their events between January and March. However, for acts, the off-season does not mean a period of inactivity, pilots. The type of displays seen at an event are constrained by a number of factors, including the weather, most aviation authorities now publish rules and guidance on minimum display heights and criteria for differing conditions. In addition to the weather, pilots and organizers must also consider local airspace restrictions, most exhibitors will plan full, rolling and flat display for varying weather and airspace conditions. The types of shows vary greatly, Air Displays can be held during day or night with the latter becoming increasingly popular. Shows dont always take place over airfields, some have held over the grounds of stately homes or castles. Before the Second World War, air shows were associated with long distance air races, often lasting many days, while the Reno Air Races keep this tradition alive, most air shows today primarily feature a series of aerial demos of short duration. Specialist aerobatic aircraft have piston engines, light weight and big control surfaces, making them capable of very high roll rates. A skilled pilot will be able to climb vertically, perform very tight turns, tumble his aircraft end-over-end, solo military jet demos, also known as tactical demo, feature one aircraft, usually a strike fighter or an advanced trainer. The demonstration focuses on the capabilities of aircraft used in combat operations. Manoeuvres include aileron rolls, barrel rolls, hesitation rolls, Cuban-8s, tight turns, high-alpha flight, a pass, double Immelmans. Tactical demos may include simulated bomb drops, sometimes with pyrotechnics on the ground for effect
2.
Fireworks
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Fireworks are a class of low explosive pyrotechnic devices used for aesthetic and entertainment purposes. The most common use of a firework is as part of a fireworks display, Fireworks competitions are also regularly held at a number of places. Fireworks take many forms to produce the four primary effects, noise, light, smoke and they may be designed to burn with colored flames and sparks including red, orange, yellow, green, blue, purple, and silver. Displays are common throughout the world and are the point of many cultural. Fireworks were invented in ancient China in the 7th century to scare evil spirits. Such important events and festivities as Chinese New Year and the Mid-Autumn Moon Festival were, China is the largest manufacturer and exporter of fireworks in the world. Fireworks are generally classified as to where they perform, either as a ground or aerial firework, in the latter case they may provide their own propulsion or be shot into the air by a mortar. The most common feature of fireworks is a paper or pasteboard tube or casing filled with the combustible material, a number of these tubes or cases are often combined so as to make, when kindled, a great variety of sparkling shapes, often variously colored. The skyrocket is a form of firework, although the first skyrockets were used in war. The aerial shell, however, is the backbone of todays commercial aerial display, such rocket technology has also been used for the delivery of mail by rocket and is used as propulsion for most model rockets. The earliest documentation of fireworks dates back to 7th century China, the fireworks were used to accompany many festivities. It is thus a part of the culture of China and had its origin there, the art and science of firework making has developed into an independent profession. In China, pyrotechnicians were respected for their knowledge of techniques in mounting firework displays. Chinese people originally believed that the fireworks could expel evil spirits and bring about luck, during the Song Dynasty, many of the common people could purchase various kinds of fireworks from market vendors, and grand displays of fireworks were also known to be held. In 1110, a fireworks display in a martial demonstration was held to entertain Emperor Huizong of Song. A record from 1264 states that a rocket-propelled firework went off near the Empress Dowager Gong Sheng, rocket propulsion was common in warfare, as evidenced by the Huolongjing compiled by Liu Bowen and Jiao Yu. In 1240 the Arabs acquired knowledge of gunpowder and its uses from China, with the development of chinoiserie in Europe, Chinese fireworks began to gain popularity around the mid-17th century. Lev Izmailov, ambassador of Peter the Great, once reported from China and his writings would be translated in 1765, resulting in the popularization of fireworks and further attempts to uncover the secrets of Chinese fireworks
3.
Louisville, Kentucky
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Louisville is the largest city in the Commonwealth of Kentucky and the 30th-most populous city in the United States. It is one of two cities in Kentucky designated as first-class, the other being the states second-largest city of Lexington, Louisville is the historical seat and, since 2003, the nominal seat of Jefferson County. Louisville was founded in 1778 by George Rogers Clark and is named after King Louis XVI of France, making Louisville one of the oldest cities west of the Appalachian Mountains. Sited beside the Falls of the Ohio, the major obstruction to river traffic between the upper Ohio River and the Gulf of Mexico, the settlement first grew as a portage site. It was the city of the Louisville and Nashville Railroad. Its main airport is also the site of United Parcel Services worldwide air hub, since 2003, Louisvilles borders have been the same as those of Jefferson County because of a city-county merger. The official name of this consolidated city-county government is the Louisville/Jefferson County Metro Government, the citys total consolidated population as of the 2014 census estimate was 760,026. However, the total of 612,780 excludes other incorporated places and semiautonomous towns within the county and is the population listed in most sources. As of 2014, the MSA had a population of 1,269,702, the history of Louisville spans hundreds of years, and has been influenced by the areas geography and location. The rapids at the Falls of the Ohio created a barrier to river travel, the first European settlement in the vicinity of modern-day Louisville was on Corn Island in 1778 by Col. George Rogers Clark, credited as the founder of Louisville. Several landmarks in the community are named after him, two years later, in 1780, the Virginia General Assembly approved the town charter of Louisville. The city was named in honor of King Louis XVI of France, early residents lived in forts to protect themselves from Indian raids, but moved out by the late 1780s. In 1803, explorers Meriwether Lewis and William Clark organized their expedition across America in the town of Clarksville, Indiana at the present-day Falls of the Ohio opposite Louisville, Kentucky. The citys early growth was influenced by the fact river boats had to be unloaded and moved downriver before reaching the falls. By 1828, the population had swelled to 7,000, the city grew rapidly in its formative years. Louisville was a shipping port and slaves worked in a variety of associated trades. The city was often a point of escape for slaves to the north, during the Civil War, Louisville was a major stronghold of Union forces, which kept Kentucky firmly in the Union. It was the center of planning, supplies, recruiting, and transportation for numerous campaigns, by the end of the war, Louisville had not been attacked, although skirmishes and battles, including the battles of Perryville and Corydon, took place nearby
4.
Kentucky
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Kentucky, officially the Commonwealth of Kentucky, is a state located in the east south-central region of the United States. Kentucky is one of four U. S. states constituted as a commonwealth, originally a part of Virginia, in 1792 Kentucky became the 15th state to join the Union. Kentucky is the 37th most extensive and the 26th most populous of the 50 United States, Kentucky is known as the Bluegrass State, a nickname based on the bluegrass found in many of its pastures due to the fertile soil. One of the regions in Kentucky is the Bluegrass Region in central Kentucky. In 1776, the counties of Virginia beyond the Appalachian Mountains became known as Kentucky County, the precise etymology of the name is uncertain, but likely based on an Iroquoian name meaning the meadow or the prairie. Kentucky is situated in the Upland South, a significant portion of eastern Kentucky is part of Appalachia. Kentucky borders seven states, from the Midwest and the Southeast, West Virginia lies to the east, Virginia to the southeast, Tennessee to the south, Missouri to the west, Illinois and Indiana to the northwest, and Ohio to the north and northeast. Only Missouri and Tennessee, both of which border eight states, touch more, Kentuckys northern border is formed by the Ohio River and its western border by the Mississippi River. The official state borders are based on the courses of the rivers as they existed when Kentucky became a state in 1792, for instance, northbound travelers on U. S.41 from Henderson, after crossing the Ohio River, will be in Kentucky for about two miles. Ellis Park, a racetrack, is located in this small piece of Kentucky. Waterworks Road is part of the land border between Indiana and Kentucky. Kentucky has a part known as Kentucky Bend, at the far west corner of the state. It exists as an exclave surrounded completely by Missouri and Tennessee, Road access to this small part of Kentucky on the Mississippi River requires a trip through Tennessee. The epicenter of the powerful 1811–12 New Madrid earthquakes was near this area, much of the outer Bluegrass is in the Eden Shale Hills area, made up of short, steep, and very narrow hills. The Jackson Purchase and western Pennyrile are home to several bald cypress/tupelo swamps, located within the southeastern interior portion of North America, Kentucky has a climate that can best be described as a humid subtropical climate. Temperatures in Kentucky usually range from daytime summer highs of 87 °F to the low of 23 °F. The average precipitation is 46 inches a year, Kentucky experiences four distinct seasons, with substantial variations in the severity of summer and winter. The highest recorded temperature was 114 °F at Greensburg on July 28,1930 while the lowest recorded temperature was −37 °F at Shelbyville on January 19,1994, due to its location, Kentucky has a moderate humid subtropical climate, with abundant rainfall
5.
North America
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North America is a continent entirely within the Northern Hemisphere and almost all within the Western Hemisphere. It can also be considered a subcontinent of the Americas. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the west and south by the Pacific Ocean, and to the southeast by South America and the Caribbean Sea. North America covers an area of about 24,709,000 square kilometers, about 16. 5% of the land area. North America is the third largest continent by area, following Asia and Africa, and the fourth by population after Asia, Africa, and Europe. In 2013, its population was estimated at nearly 565 million people in 23 independent states, or about 7. 5% of the worlds population, North America was reached by its first human populations during the last glacial period, via crossing the Bering land bridge. The so-called Paleo-Indian period is taken to have lasted until about 10,000 years ago, the Classic stage spans roughly the 6th to 13th centuries. The Pre-Columbian era ended with the migrations and the arrival of European settlers during the Age of Discovery. Present-day cultural and ethnic patterns reflect different kind of interactions between European colonists, indigenous peoples, African slaves and their descendants, European influences are strongest in the northern parts of the continent while indigenous and African influences are relatively stronger in the south. Because of the history of colonialism, most North Americans speak English, Spanish or French, the Americas are usually accepted as having been named after the Italian explorer Amerigo Vespucci by the German cartographers Martin Waldseemüller and Matthias Ringmann. Vespucci, who explored South America between 1497 and 1502, was the first European to suggest that the Americas were not the East Indies, but a different landmass previously unknown by Europeans. In 1507, Waldseemüller produced a map, in which he placed the word America on the continent of South America. He explained the rationale for the name in the accompanying book Cosmographiae Introductio, for Waldseemüller, no one should object to the naming of the land after its discoverer. He used the Latinized version of Vespuccis name, but in its feminine form America, following the examples of Europa, Asia and Africa. Later, other mapmakers extended the name America to the continent, In 1538. Some argue that the convention is to use the surname for naming discoveries except in the case of royalty, a minutely explored belief that has been advanced is that America was named for a Spanish sailor bearing the ancient Visigothic name of Amairick. Another is that the name is rooted in a Native American language, the term North America maintains various definitions in accordance with location and context. In Canadian English, North America may be used to refer to the United States, alternatively, usage sometimes includes Greenland and Mexico, as well as offshore islands
6.
Public address system
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Simple PA systems are often used in small venues such as school auditoriums, churches, and small bars. Intercom systems, installed in buildings, have both speakers throughout a building, and microphones in many rooms allowing the occupants to respond to announcements. Sound reinforcement systems and PA systems may use some similar components, Sound reinforcement systems are for live music or performance, whereas PA systems are primarily for reproduction of speech. A short time later the Automatic Enunciator Company was established in Chicago in order to market the new device, in August 1912 a large outdoor installation was made at a water carnival held in Chicago by the Associated Yacht and Power Boat Clubs of America. Seventy-two loudspeakers were strung in pairs at intervals along the docks. The system was used to announce race reports and descriptions, carry a series of speeches about The Chicago Plan, and provide music between races. Four years later, in 1915, they built a dynamic loudspeaker with a 1-inch voice coil, a 3-inch corrugated diaphragm, the electromagnet created a flux field of approximately 11,000 G. Their first experiment used a carbon microphone, when the 12 V battery was connected to the system, they experienced one of the first examples of acoustic feedback. They then placed the loudspeaker on the roof, and claims say that the amplified human voice could be heard 1 mile away. Jensen and Pridham refined the system and connected a phonograph to the loudspeaker to be able to broadcast recorded music and this demonstration was official presentation of the working system, and approximately 100,000 people gathered to hear Christmas music and speeches with absolute distinctness. The first outside broadcast was one week later, again supervised by Jensen. Jensen oversaw the governor using the microphone while Pridham operated the loudspeaker, the following year, Jensen and Pridham applied for a patent for what they called their Sound Magnifying Phonograph. Over the next two years developed their first valve amplifier. In 1919 this was standardized as a 3-stage 25 watt amplifier, wilsons speech was part of his nationwide tour to promote the establishment of the League of Nations. It was held on September 9,1919 at City Stadium, as with the San Francisco installation, Jensen supervised the microphone and Pridham the loudspeakers. Wilson spoke into two large horns mounted on his platform which channelled his voice into the microphone, similar systems were used in the following years by Warren G. Harding and Franklin D. Roosevelt. By the early 1920s, Marconi had established a department dedicated to public address, in 1925, George V used such a system at the British Empire Exhibition, addressing 90,000 via six long-range loudspeakers. This public use of loudspeakers brought attention to the possibilities of such technology, the 1925 Royal Air Force Pageant at Hendon Aerodrome used a Marconi system to allow the announcer to address the crowds, as well as amplify the band
7.
Radio
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When radio waves strike an electrical conductor, the oscillating fields induce an alternating current in the conductor. The information in the waves can be extracted and transformed back into its original form, Radio systems need a transmitter to modulate some property of the energy produced to impress a signal on it, for example using amplitude modulation or angle modulation. Radio systems also need an antenna to convert electric currents into radio waves, an antenna can be used for both transmitting and receiving. The electrical resonance of tuned circuits in radios allow individual stations to be selected, the electromagnetic wave is intercepted by a tuned receiving antenna. Radio frequencies occupy the range from a 3 kHz to 300 GHz, a radio communication system sends signals by radio. The term radio is derived from the Latin word radius, meaning spoke of a wheel, beam of light, however, this invention would not be widely adopted. The switch to radio in place of wireless took place slowly and unevenly in the English-speaking world, the United States Navy would also play a role. Although its translation of the 1906 Berlin Convention used the terms wireless telegraph and wireless telegram, the term started to become preferred by the general public in the 1920s with the introduction of broadcasting. Radio systems used for communication have the following elements, with more than 100 years of development, each process is implemented by a wide range of methods, specialised for different communications purposes. Each system contains a transmitter, This consists of a source of electrical energy, the transmitter contains a system to modulate some property of the energy produced to impress a signal on it. This modulation might be as simple as turning the energy on and off, or altering more subtle such as amplitude, frequency, phase. Amplitude modulation of a carrier wave works by varying the strength of the signal in proportion to the information being sent. For example, changes in the strength can be used to reflect the sounds to be reproduced by a speaker. It was the used for the first audio radio transmissions. Frequency modulation varies the frequency of the carrier, the instantaneous frequency of the carrier is directly proportional to the instantaneous value of the input signal. FM has the capture effect whereby a receiver only receives the strongest signal, Digital data can be sent by shifting the carriers frequency among a set of discrete values, a technique known as frequency-shift keying. FM is commonly used at Very high frequency radio frequencies for high-fidelity broadcasts of music, analog TV sound is also broadcast using FM. Angle modulation alters the phase of the carrier wave to transmit a signal
8.
Ohio River
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The Ohio River, which streams westward from Pittsburgh, Pennsylvania, to Cairo, Illinois, is the largest tributary, by volume, of the Mississippi River in the United States. The 981-mile river flows through or along the border of six states, through its largest tributary, the Tennessee River, the basin includes many of the states of the southeastern U. S. It is the source of drinking water for three million people and it is named in Iroquoian or Seneca, Ohi, yó, lit. Good River or Shawnee, Pelewathiipi and Spelewathiipi, the river had great significance in the history of the Native Americans, as numerous civilizations formed along its valley. For thousands of years, Native Americans used the river as a major transportation, in 1669, René-Robert Cavelier, Sieur de La Salle led a French expedition to the Ohio River, becoming the first Europeans to see it. After European-American settlement, the served as a border between present-day Kentucky and Indian Territories. It was a transportation route for pioneers during the westward expansion of the early U. S. In his Notes on the State of Virginia published in 1781–82, Thomas Jefferson stated and its current gentle, waters clear, and bosom smooth and unbroken by rocks and rapids, a single instance only excepted. During the 19th century, the river was the boundary of the Northwest Territory. Where the river was narrow, it was the way to freedom for thousands of slaves escaping to the North, many helped by free blacks and whites of the Underground Railroad resistance movement. The Ohio River is a transition area, as its water runs along the periphery of the humid subtropical. It is inhabited by fauna and flora of both climates, in winter, it regularly freezes over at Pittsburgh but rarely further south toward Cincinnati and Louisville. At Paducah, Kentucky, in the south, near the Ohios confluence with the Mississippi, Paducah was founded there because it is the northernmost ice-free reach of the Ohio. The Ohio River is formed by the confluence of the Allegheny and Monongahela rivers at Point State Park in Pittsburgh, from there, it flows northwest through Allegheny and Beaver counties, before making an abrupt turn to the south-southwest at the West Virginia–Ohio–Pennsylvania triple-state line. From there, it forms the border between West Virginia and Ohio, upstream of Wheeling, West Virginia, the river then follows a roughly southwest and then west-northwest course until Cincinnati, before bending to a west-southwest course for most of its length. The course forms the borders of West Virginia and Kentucky. The Ohio drains parts of 15 states in four regions, northeast New York, a small area of the southern border along the headwaters of the Allegheny. Pennsylvania, a corridor from the corner to north central border
9.
Jeffersonville, Indiana
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Jeffersonville /ˈdʒɛfərsənvɪl/ is a city in Clark County, Indiana, along the Ohio River. Locally, the city is referred to by the abbreviated name Jeff. It is directly across the Ohio River to the north of Louisville, Kentucky, the population was 44,953 at the 2010 census. The city is the county seat of Clark County, in 1786 Fort Finney was situated where the Kennedy Bridge is today to protect the area from Indians, and a settlement grew around the fort. The fort was renamed in 1791 to Fort Steuben in honor of Baron von Steuben, in 1793 the fort was abandoned. Precisely when the settlement became known as Jeffersonville is unclear, but it was probably around 1801, in 1802 local residents used a grid pattern designed by Thomas Jefferson for the formation of a city. On September 13,1803, a post office was established in the city, in 1808 Indianas second federal land sale office was established in Jeffersonville, which initiated a growth in settling in Indiana that was further spurred by the end of the War of 1812. Shortly after formation, Jeffersonville was named to be the county seat of Clark County in 1802, in 1812 Charlestown was named the county seat, but the county seat returned to Jeffersonville in 1878, where it remains. However, it is debated by some that Dennis Pennington had some involvement to his location to Jeffersonville, the territorial legislature remained in Corydon and communicated with Posey by messenger. In 1825, General Lafayette visited Jeffersonville on his United States tour, the Civil War increased the importance of Jeffersonville, as the city was one of the principal gateways to the South during the war, due to its location directly opposite Louisville. It was served by three railroads from the north and had the waterway of the Ohio River and this factor influenced its selection as one of the principal bases for supplies and troops for the Union Army. Operating in the South, the Louisville and Nashville Railroad furnished the connecting link between Louisville and the rest of the South, camp Joe Holt was instrumental in keeping Kentucky within the Union. The third largest Civil War hospital, Jefferson General Hospital was located in nearby Port Fulton from 1864 to 1866, as it was close to the river and Louisville. The original land was seized by the government from the Honorable Jesse D. Bright, United States Senator. During the war it housed 16,120 patients in its 5,200 beds and was under the command of Dr. Middleton Goldsmith, the Jeffersonville Quartermaster Intermediate Depot had its first beginning in the early days of the Civil War, near its present location. By 1870, 17% of Jeffersonville residents were foreign-born, mostly from Germany, during the 1920s, Jeffersonville was a popular gathering place for the Ku Klux Klan, as Louisville and New Albany had strong anti-Klan laws and Jeffersonville did not. Gambling in the 1930s and 1940s was instrumental in Jeffersonvilles recovery from the Great Depression, casinos, betting parlors, night clubs, and even a dog track were present, giving the town the nickname Little Las Vegas. After Clarence Amster, a New Albany businessman was gunned down on July 2,1937, bottorff, ensured that the equipment was confiscated and the money at the casinos given to charity
10.
Clarksville, Indiana
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Clarksville is a town in Clark County, Indiana, United States, along the Ohio River and is a part of the Louisville Metropolitan area. The population was 21,724 at the 2010 census, the town was founded in 1783 by early resident George Rogers Clark at the only seasonal rapids on the entire Ohio River, it is the oldest American town in the Northwest Territory. The town is home to the Colgate clock, one of the largest clocks in the world, the site that would become Clarksville was first used as a base of operations by George Rogers Clark during the American Revolution. In 1778 he established a post on an island at the head of the Falls of the Ohio, after the war, Clark was granted a tract of 150,000 acres for his services in the war. In 1783,1,000 acres were set aside for the development of a town, the same year a stockade was built and settlement began. The explorer William Clark was a brother of George Rogers Clark. Renowned historian Stephen Ambrose writes of Meriwether Lewis and William Clark in Undaunted Courage, When they shook hands, a two-figure statue near the falls commemorates the expedition. Several localities other than Clarksville claim precedence for the start of the Lewis and Clark Expedition, most notably St. Louis, due to the many floods in the nineteenth century and the Indiana Canal Companys failed competition to build a canal around the Ohio Falls, the town struggled. On August 24,1805 the Indiana Territorial Legislature authorized the construction of a canal around the Falls of the Ohio at Clarksville, the first attempt failed and the investors lost their money. Historians believe it was used to finance the conspiracy of Aaron Burr, developers tried to build a canal in 1817 and again in 1820. But the race to build the canal was lost in 1826 when the government made a large grant to build the Louisville. The lack of a canal handicapped the growth of the town as the Falls of the Ohio made river transport from the city difficult, Clarksville became a popular dueling spot for Kentuckians who wanted to dodge their home states anti-dueling laws. The most famous of these was the 1809 duel between Henry Clay and Humphrey Marshall, there was an attempt to build a second town within Clarksvilles boundaries, named Ohio Falls City, until the Indiana Supreme Court ruled that this would be illegal. The town was managed by a ten-member Board of Trustees in the charter from Virginia, the trustees were allowed to align lots along roads and sell the lots for the proceeds to benefit the town. The trustees could elect replacements as needed and did not have to reside in the town and this remained controversial with residents until 1889 when the board stopped meeting and was replaced by a three-member board. One member was selected by the Floyd County Commissioners, one by the Clark County Commissioners, between 1889 and 1937, the town established a five-member board entirely elected by residents. The historic records related to this change were lost in the Ohio River flood of 1937. The Great Flood of 1937 decimated the town, the entire town was submerged beneath as much as 12 feet of water in some areas for over three weeks during January and February
