A submarine is a watercraft capable of independent operation underwater. It differs from a submersible, it is sometimes used or colloquially to refer to remotely operated vehicles and robots, as well as medium-sized or smaller vessels, such as the midget submarine and the wet sub. Although experimental submarines had been built before, submarine design took off during the 19th century, they were adopted by several navies. Submarines were first used during World War I, are now used in many navies large and small. Military uses include attacking enemy surface ships, attacking other submarines, aircraft carrier protection, blockade running, ballistic missile submarines as part of a nuclear strike force, conventional land attack, covert insertion of special forces. Civilian uses for submarines include marine science, salvage and facility inspection and maintenance. Submarines can be modified to perform more specialized functions such as search-and-rescue missions or undersea cable repair. Submarines are used in tourism, for undersea archaeology.
Most large submarines consist of a cylindrical body with hemispherical ends and a vertical structure located amidships, which houses communications and sensing devices as well as periscopes. In modern submarines, this structure is the "sail" in American usage and "fin" in European usage. A "conning tower" was a feature of earlier designs: a separate pressure hull above the main body of the boat that allowed the use of shorter periscopes. There is a propeller at the rear, various hydrodynamic control fins. Smaller, deep-diving and specialty submarines may deviate from this traditional layout. Submarines use diving planes and change the amount of water and air in ballast tanks to change buoyancy for submerging and surfacing. Submarines have one of the widest ranges of capabilities of any vessel, they range from small autonomous examples and one- or two-person vessels that operate for a few hours, to vessels that can remain submerged for six months—such as the Russian Typhoon class, the biggest submarines built.
Submarines can work at greater depths than are practical for human divers. Modern deep-diving submarines derive from the bathyscaphe, which in turn evolved from the diving bell. Whereas the principal meaning of "submarine" is an armed, submersible warship, the more general meaning is for any type of submersible craft; the definition as of 1899 was for any type of "submarine boat". By naval tradition, submarines are still referred to as "boats" rather than as "ships", regardless of their size. In other navies with a history of large submarine fleets they are "boats". According to a report in Opusculum Taisnieri published in 1562: Two Greeks submerged and surfaced in the river Tagus near the City of Toledo several times in the presence of The Holy Roman Emperor Charles V, without getting wet and with the flame they carried in their hands still alight. In 1578, the English mathematician William Bourne recorded in his book Inventions or Devises one of the first plans for an underwater navigation vehicle.
A few years the Scottish mathematician and theologian John Napier wrote in his Secret Inventions the following: "These inventions besides devises of sayling under water with divers, other devises and strategems for harming of the enemyes by the Grace of God and worke of expert Craftsmen I hope to perform." It's unclear whether he carried out his idea. The first submersible of whose construction there exists reliable information was designed and built in 1620 by Cornelis Drebbel, a Dutchman in the service of James I of England, it was propelled by means of oars. By the mid-18th century, over a dozen patents for submarines/submersible boats had been granted in England. In 1747, Nathaniel Symons patented and built the first known working example of the use of a ballast tank for submersion, his design used leather bags. A mechanism was used to cause the boat to resurface. In 1749, the Gentlemen's Magazine reported that a similar design had been proposed by Giovanni Borelli in 1680. Further design improvement stagnated for over a century, until application of new technologies for propulsion and stability.
The first military submarine was the Turtle, a hand-powered acorn-shaped device designed by the American David Bushnell to accommodate a single person. It was the first verified submarine capable of independent underwater operation and movement, the first to use screws for propulsion. In 1800, France built a human-powered submarine designed by the Nautilus; the French gave up on the experiment in 1804, as did the British when they considered Fulton's submarine design. In 1864, late in the American Civil War, the Confederate navy's H. L. Hunley became the first military submarine to sink an enemy vessel, the Union sloop-of-war USS Housatonic. In the aftermath of its successful attack against the ship, the Hunley sank because it was too close to its own exploding torpedo. In 1866, the Sub Marine Explorer was the first submarine to dive, cruise underwater, resurface under the control of the crew; the design by German American Julius H. Kroehl incorporated elements that are still used in modern submarines.
In 1866, the Flach was built at the request of the Chilean government, by Karl Flach, a German engineer and immigrant
Google Books is a service from Google Inc. that searches the full text of books and magazines that Google has scanned, converted to text using optical character recognition, stored in its digital database. Books are provided either by publishers and authors, through the Google Books Partner Program, or by Google's library partners, through the Library Project. Additionally, Google has partnered with a number of magazine publishers to digitize their archives; the Publisher Program was first known as Google Print when it was introduced at the Frankfurt Book Fair in October 2004. The Google Books Library Project, which scans works in the collections of library partners and adds them to the digital inventory, was announced in December 2004; the Google Books initiative has been hailed for its potential to offer unprecedented access to what may become the largest online body of human knowledge and promoting the democratization of knowledge. However, it has been criticized for potential copyright violations, lack of editing to correct the many errors introduced into the scanned texts by the OCR process.
As of October 2015, the number of scanned book titles was over 25 million, but the scanning process has slowed down in American academic libraries. Google estimated in 2010 that there were about 130 million distinct titles in the world, stated that it intended to scan all of them. Results from Google Books show up in both the universal Google Search and in the dedicated Google Books search website. In response to search queries, Google Books allows users to view full pages from books in which the search terms appear if the book is out of copyright or if the copyright owner has given permission. If Google believes the book is still under copyright, a user sees "snippets" of text around the queried search terms. All instances of the search terms in the book text appear with a yellow highlight; the four access levels used on Google Books are: Full view: Books in the public domain are available for "full view" and can be downloaded for free. In-print books acquired through the Partner Program are available for full view if the publisher has given permission, although this is rare.
Preview: For in-print books where permission has been granted, the number of viewable pages is limited to a "preview" set by a variety of access restrictions and security measures, some based on user-tracking. The publisher can set the percentage of the book available for preview. Users are restricted from downloading or printing book previews. A watermark reading "Copyrighted material" appears at the bottom of pages. All books acquired through the Partner Program are available for preview. Snippet view: A'snippet view' – two to three lines of text surrounding the queried search term – is displayed in cases where Google does not have permission of the copyright owner to display a preview; this could be because Google can not identify the owner declined permission. If a search term appears many times in a book, Google displays no more than three snippets, thus preventing the user from viewing too much of the book. Google does not display any snippets for certain reference books, such as dictionaries, where the display of snippets can harm the market for the work.
Google maintains. No preview: Google displays search results for books that have not been digitized; as these books have not been scanned, their text is not searchable and only the metadata such as the title, publisher, number of pages, ISBN, subject and copyright information, in some cases, a table of contents and book summary is available. In effect, this is similar to an online library card catalog. In response to criticism from groups such as the American Association of Publishers and the Authors Guild, Google announced an opt-out policy in August 2005, through which copyright owners could provide a list of titles that it did not want scanned, Google would respect the request. Google stated that it would not scan any in-copyright books between August and 1 November 2005, to provide the owners with the opportunity to decide which books to exclude from the Project. Thus, Google provides a copyright owner with three choices with respect to any work: It can participate in the Partner Program to make a book available for preview or full view, in which case it would share revenue derived from the display of pages from the work in response to user queries.
It can let Google scan the book under the Library Project and display snippets in response to user queries. It can opt out of the Library Project. If the book has been scanned, Google will reset its access level as'No preview'. Most scanned works are commercially available. In addition to procuring books from libraries, Google obtains books from its publisher partners, through the "Partner Program" – designed to help publishers and authors promote their books. Publishers and authors submit either a digital copy of their book in EPUB or PDF format, or a print copy to Google, made available on Google Books for preview; the publisher can control the percentage of the book available for preview, with the minimum being 20%. They can choose to make the book viewable, allow users to download a PDF copy. Books can be made available for sale on Google Play. Unlike the Library Project, this does not raise any copyright concerns as it is conducted pursuant to an agreement with the publisher; the publisher can choose to withdraw from the agreement at any time.
For many books, Google Books displays the original page numbers. However, Tim Pa
Signal Corps (United States Army)
The United States Army Signal Corps is a division of the Department of the Army that creates and manages communications and information systems for the command and control of combined arms forces. It was established in 1860, the brainchild of Major Albert J. Myer, had an important role in the American Civil War. Over its history, it had the initial responsibility for portfolios and new technologies that were transferred to other U. S. government entities. Such responsibilities included military intelligence, weather forecasting, aviation. Support for the command and control of combined arms forces. Signal support includes network operations and management of the electromagnetic spectrum. Signal support encompasses all aspects of designing, data communications networks that employ single and multi-channel satellite, tropospheric scatter, terrestrial microwave, messaging, video-teleconferencing, visual information, other related systems, they integrate tactical and sustaining base communications, information processing and management systems into a seamless global information network that supports knowledge dominance for Army and coalition operations.
While serving as a medical officer in Texas in 1856, Albert James Myer proposed that the Army use his visual communications system, called aerial telegraphy. When the Army adopted his system on 21 June 1860, the Signal Corps was born with Myer as the first and only Signal Officer. Major Myer first used his visual signaling system on active service in New Mexico during the early 1860s Navajo expedition. Using flags for daytime signaling and a torch at night, wigwag was tested in Civil War combat in June 1861 to direct the fire of a harbor battery at Fort Wool against the Confederate positions opposite Fort Monroe. For nearly three years, Myer was forced to rely on detailed personnel, although he envisioned a separate, trained professional military signal service. Myer's vision came true on 3 March 1863, when Congress authorized a regular Signal Corps for the duration of the war; some 2,900 officers and enlisted men served, although not at any single time, in the Civil War Signal Corps. Myer's Civil War innovations included an unsuccessful balloon experiment at First Bull Run, and, in response to McClellan's desire for a Signal Corps field telegraph train, an electric telegraph in the form of the Beardslee magnetoelectric telegraph machine.
In the Civil War, the wigwag system, restricted to line-of-sight communications, was waning in the face of the electric telegraph. Myer used his office downtown in Washington, D. C. to house the Signal Corps School. When it was found to need additional space, he sought out other locations. First came Fort Greble, one of the Defenses of Washington during the Civil War, when that proved inadequate, Myer chose Fort Whipple, on Arlington Heights overlooking the national capital; the size and location were outstanding. The school remained there for over 20 years and was renamed Fort Myer. Signal Corps detachments participated in campaigns fighting Native Americans in the west, such as the Powder River Expedition of 1865; the electric telegraph, in addition to visual signaling, became a Signal Corps responsibility in 1867. Within 12 years, the corps had constructed, was maintaining and operating, some 4,000 miles of telegraph lines along the country's western frontier. In 1870, the Signal Corps established a congressionally mandated national weather service.
Within a decade, with the assistance of Lieutenant Adolphus Greely, Myer commanded a weather service of international acclaim. Myer died in 1880, having attained the rank of brigadier general and the title of Chief Signal Officer; the weather bureau became part of the U. S. Department of Agriculture in 1891, while the corps retained responsibility for military meteorology; the Signal Corps' role in the Spanish–American War of 1898 and the subsequent Philippine Insurrection was on a grander scale than it had been in the Civil War. In addition to visual signaling, including heliograph, the corps supplied telephone and telegraph wire lines and cable communications, fostered the use of telephones in combat, employed combat photography, renewed the use of balloons. Shortly after the war, the Signal Corps constructed the Washington-Alaska Military Cable and Telegraph System known as the Alaska Communications System, introducing the first wireless telegraph in the Western Hemisphere. For more details on this topic, see Aeronautical Division, U.
S. Signal Corps and Aviation Section, U. S. Signal Corps On 1 August 1907, an Aeronautical Division was established within the Office of the Chief Signal Officer. In 1908, on Fort Myer, the Wright brothers made test flights of the Army's first airplane built to Signal Corps' specifications. Reflecting the need for an official pilot rating, War Department Bulletin No. 2, released on 24 February 1911, established a "Military Aviator" rating. Army aviation remained within the Signal Corps until 1918. During World War I. Chief Signal Officer George Owen Squier worked with private industry to perfect radio tubes while creating a major signal laboratory at Camp Alfred Vail. Early radiotelephones developed by the Signal Corps were introduced into the European theater in 1918. While the new American voice radios were superior to the radiotelegraph sets and telegraph remained the major technology of World War I. A pioneer in radar, Colonel William Blair, director of the Signal Corps laboratories at Fort Monmouth, patented the first Army radar demonstrated in May 1937.
Before the United States entered World War II, mass
Infrastructure is the fundamental facilities and systems serving a country, city, or other area, including the services and facilities necessary for its economy to function. Infrastructure is composed of public and private physical improvements such as roads, tunnels, water supply, electrical grids, telecommunications. In general, it has been defined as "the physical components of interrelated systems providing commodities and services essential to enable, sustain, or enhance societal living conditions". There are two general types of ways to view infrastructure, soft. Hard infrastructure refers to the physical networks necessary for the functioning of a modern industry; this includes roads, railways, etc. Soft infrastructure refers to all the institutions that maintain the economic, health and cultural standards of a country; this includes educational programs, official statistics and recreational facilities, law enforcement agencies, emergency services. The word infrastructure has been used in English since 1887 and in French since 1875 meaning "The installations that form the basis for any operation or system".
The word was imported from French, where it means subgrade, the native material underneath a constructed pavement or railway. The word is a combination of the Latin prefix "infra", meaning "below" and many of these constructions are underground, for example, tunnels and gas systems, railways; the army use of the term achieved currency in the United States after the formation of NATO in the 1940s, by 1970 was adopted by urban planners in its modern civilian sense. A 1987 US National Research Council panel adopted the term "public works infrastructure", referring to: "... both specific functional modes – highways, streets and bridges. A comprehension of infrastructure spans not only these public works facilities, but the operating procedures, management practices, development policies that interact together with societal demand and the physical world to facilitate the transport of people and goods, provision of water for drinking and a variety of other uses, safe disposal of society's waste products, provision of energy where it is needed, transmission of information within and between communities."
The American Society of Civil Engineers publish a "Infrastructure Report Card" which represents the organizations opinion on the condition of various infrastructure every 2–4 years. As of 2017 they grade 16 categories, namely Aviation, Dams, Drinking Water, Hazardous Waste, Inland Waterways, Parks & Recreation, Rail, Schools, Solid Waste and Wastewater. A way to embody personal infrastructure is to think of it in term of human capital. Human capital is defined by the Encyclopedia Britannica as “intangible collective resources possessed by individuals and groups within a given population"; the goal of personal infrastructure is to determine the quality of the economic agents’ values. This results in three major tasks: the task of economic proxies’ in the economic process. Institutional infrastructure branches from the term "economic constitution". According to Gianpiero Torrisi, Institutional infrastructure is the object of economic and legal policy, it compromises the grown and sets norms. It refers to the degree of actual equal treatment of equal economic data and determines the framework within which economic agents may formulate their own economic plans and carry them out in co-operation with others.
Material infrastructure is defined as “those immobile, non-circulating capital goods that contribute to the production of infrastructure goods and services needed to satisfy basic physical and social requirements of economic agents". There are two distinct qualities of material infrastructures: 1) Fulfillment of social needs and 2) Mass production; the first characteristic deals with the basic needs of human life. The second characteristic is the non-availability of infrastructure services. According to the business dictionary, economic infrastructure can be defined as "internal facilities of a country that make business activity possible, such as communication and distribution networks, financial institutions and markets, energy supply systems". Economic infrastructure support productive events; this includes roads, bridges, water distribution networks, sewer systems, irrigation plants, etc. Social infrastructure can be broadly defined as the construction and maintenance of facilities that support social services.
Social infrastructures are created to increase social act on economic activity. These being schools and playgrounds, structures for public safety, waste disposal plants, sports area, etc. Core assets have monopolistic characteristics. Investors seeking core infrastructure look for five different characteristics: Income, Low volatility of returns, Inflation Protection, Long-term liability matching. Core Infrastructure incorporates all the main types of infrastructure. For instance. Basic infrastructure refers to main railways, canals, harbors and
Sea level rise
Since at least the start of the 20th century, the average global sea level has been rising. Between 1900 and 2016, the sea level rose by 16–21 cm. More precise data gathered from satellite radar measurements reveal an accelerating rise of 7.5 cm from 1993 to 2017, a trend of 30 cm per century. This acceleration is due to human-caused global warming, driving thermal expansion of seawater and the melting of land-based ice sheets and glaciers. Between 1993 and 2018, thermal expansion of the oceans contributed 42% to sea level rise. Climate scientists expect the rate to further accelerate during the 21st century. Projecting future sea level is challenging, due to the complexity of many aspects of the climate system; as climate research into past and present sea levels leads to improved computer models, projections have increased. For example, in 2007 the Intergovernmental Panel on Climate Change projected a high end estimate of 60 cm through 2099, but their 2014 report raised the high-end estimate to about 90 cm.
A number of studies have concluded that a global sea level rise of 200 to 270 cm this century is "physically plausible". A conservative estimate of the long-term projections is that each Celsius degree of temperature rise triggers a sea level rise of 2.3 metres over a period of two millennia: an example of climate inertia. The sea level will not rise uniformly everywhere on Earth, it will drop in some locations. Local factors include tectonic effects and subsidence of the land, tides and storms. Sea level rises can influence human populations in coastal and island regions. Widespread coastal flooding is expected with several degrees of warming sustained for millennia. Further effects are higher storm-surges and more dangerous tsunamis, displacement of populations and degradation of agricultural land and damage in cities. Natural environments like marine ecosystems are affected, with fish and plants losing parts of their habitat. Societies can respond to sea level rise in three different ways: to retreat, to accommodate and to protect.
Sometimes these adaptation strategies go hand in hand, but at other times choices have to be made among different strategies. Ecosystems that adapt to rising sea levels by moving inland might not always be able to do so, due to natural or man-made barriers. Understanding past sea level is important for the analysis of current and future changes. In the recent geological past, changes in land ice and thermal expansion from increased temperatures are the dominant reasons of sea level rise; the last time the Earth was 2 °C warmer than pre-industrial temperatures, sea levels were at least 5 metres higher than now: this was when warming because of changes in the amount of sunlight due to slow changes in the Earth's orbit caused the last interglacial. The warming was sustained over a period of thousands of years and the magnitude of the rise in sea level implies a large contribution from the Antarctic and Greenland ice sheets. Since the last glacial maximum about 20,000 years ago, the sea level has risen by more than 125 metres, with rates varying from less than a mm/year to 40+ mm/year, as a result of melting ice sheets over Canada and Eurasia.
Rapid disintegration of ice sheets led to so called'meltwater pulses', periods during which sea level rose rapidly. The rate of rise started to slow down about 8,200 years before present. Sea level changes can be driven either by variations in the amount of water in the oceans, the volume of the ocean or by changes of the land compared to the sea surface; the different techniques used to measure changes in sea level do not measure the same. Tide gauges can only measure relative sea level, whilst satellites can measure absolute sea level changes. To get precise measurements for sea level, researchers studying the ice and the oceans on our planet factor in ongoing deformations of the solid Earth, in particular due to landmasses still rising from past ice masses retreating, the Earth's gravity and rotation. Since the 1992 launch of TOPEX/Poseidon, altimetric satellites have been recording the change in sea level; those satellites can measure the hills and valleys in the sea caused by currents and detect trends in their height.
To measure the distance to the sea surface, the satellite sends a microwave pulse to the ocean's surface and records the time it takes to return. A microwave radiometer corrects any delay. Combining this data with the precise location of the spacecraft makes it possible to determine sea-surface height to within a few centimeters. Current rates of sea level rise from satellite altimetry have been estimated to be 3.0 ± 0.4 millimetres per year for the period 1993–2017. Earlier satellite measurements were at odds with tide gauge measurements. A small calibration error for the Topex/Poseidon satellite discovered in 2015 was identified as the cause of this mismatch, it had caused a slight overestimation of the 1992–2005 sea levels, which masked the ongoing sea level rise acceleration. Satellites are useful for measuring regional variations in sea level, such as the substantial rise between 1993 and 2012 in the western tropical Pacific; this sharp rise has been linked to increasing trade winds, which occur when the Pacific Decadal Oscillation and the El Niño–Southern Oscillation change from one state to t
In social science, the term built environment, or built world, refers to the human-made surroundings that provide the setting for human activity, ranging in scale from buildings to parks. It has been defined as "the human-made space in which people live and recreate on a day-to-day basis." The "built environment encompasses places and spaces created or modified by people including buildings and transportation systems." In recent years, public health research has expanded the definition of "built environment" to include healthy food access, community gardens, mental health, "walkability", "bikeability". Early concepts of built environment date to Classical Antiquity: Hippodamus of Miletos, known as the "father of urban planning," developed Greek cities from 498 BC to 408 BC that created order by using grid plans that mapped the city; these early city plans gave way to the City Beautiful movement in the late 1800s and early 1900s, inspired by Daniel Hudson Burnham, a reformist for the Progressivism movement who promoted "a reform of the landscape in tandem with political change."
The effort was in partnership with others who believed that beautifying American cities would improve the moral compass of the cities and encourage the upper class to spend their money in cities. This beautification process included architectural design. By mid-century modernist "indifferent" design influenced the character of work and public spaces, followed by what Alexander describes as a late twentieth century "revival of interest relating to the concept of place, its relevance to mental health and other fields of study." Built environments are used to describe the interdisciplinary field that addresses the design, construction and use of these man-made surroundings as an interrelated whole as well as their relationship to human activities over time. The field is not regarded as a traditional profession or academic discipline in its own right, instead drawing upon areas such as economics, public policy, public health, geography, engineering and environmental sustainability. Within the field of public health, built environments are referred to as building or renovating areas in an effort to improve the community's well-being through construction of “aesthetically, health improved, environmentally improved landscapes and living structures”.
For example: community forest user group in Nepal is multidimensional institution, which serves goods and services to the communities through natural resource management. Technology is playing a pivotal role in shaping the industries of today by augmenting processes, streamlining activities, integrating innovations to propel the functioning of companies and organisations across a multitude of industries and help them achieve new heights. Building information modeling is prominent practice, it involves illustration & pre-execution overview of physical and functional characteristics of places. BIM tools help the planner in making a future ready informed decision regarding a building or other built asset. Smart Building Management, Drone-based Surveying, 3D Printing, Intelligent Transportation System are recent implementation of technology in modern built environment. In public health, built environment refers to physical environments that are designed with health and wellness as integral parts of the communities.
Research has indicated that the way neighbourhoods are created can affect both the physical activity and mental health of the communities’ residents. Studies have shown that built environments that were expressly designed to improve physical activity are linked to higher rates of physical activity, which in turn, positively affects health. Neighbourhoods with more walkability had lower rates of obesity as well as increased physical activity among its residents, they had lower rates of depression, higher social capital, less alcohol abuse. Walkability features in these neighbourhoods include safety, sidewalk construction, as well as destinations in which to walk. In addition, the perception of a walkable neighbourhood, one, perceived to have good sidewalks and connectivity, is correlated with higher rates of physical activity. Assessments of walkability have been completed through the use of GIS programs, such as the Street Smart Walk Score; this example of a walkability assessment tool determines distances to grocery stores and other amenities, as well as connectivity and intersection frequency using specific addresses.
Assessments such as the Street Smart Walk Score can be utilized by city and country planning departments to improve existing walkability of communities. To implement walkable neighbourhoods, community members and local leaders should focus on policy development. An effective framework, utilized in an abundance of communities is the Complete Streets concept of community planning, developed by the National Complete Streets Coalition. NCSC states that the most successful policies are those that reflect input from a broad group of stakeholders, including transportation planners and engineers, elected officials, transit agencies, public health departments, members of the community. According to Riggs, 2016, policies may focus on a “Complete Streets” investment, which includes sidewalk bulb-outs and refuges to reduce crossing distances or street widths for pedestrians. Other investments should include installing crosswalks, road markings, benches and sidewalk art installations; every community will have a unique method of policy development depending on whether it is an urban, suburban, or rural com
Abraham Lincoln was an American statesman and lawyer who served as the 16th president of the United States from 1861 until his assassination in April 1865. Lincoln led the nation through the American Civil War, its bloodiest war and its greatest moral and political crisis, he preserved the Union, abolished slavery, strengthened the federal government, modernized the U. S. economy. Born in Kentucky, Lincoln grew up on the frontier in a poor family. Self-educated, he became Whig Party leader, state legislator and Congressman, he left government to resume his law practice, but angered by the success of Democrats in opening the prairie lands to slavery, reentered politics in 1854. He became a leader in the new Republican Party and gained national attention in 1858 for debating and losing to national Democratic leader Stephen A. Douglas in a Senate campaign, he ran for President in 1860, sweeping the North and winning. Southern pro-slavery elements took his win as proof that the North was rejecting the Constitutional rights of Southern states to practice slavery.
They began the process of seceding from the union. To secure its independence, the new Confederate States of America fired on Fort Sumter, one of the few U. S. forts in the South. Lincoln called up volunteers and militia to restore the Union; as the leader of the moderate faction of the Republican Party, Lincoln confronted Radical Republicans, who demanded harsher treatment of the South. Lincoln fought the factions by pitting them against each other, by distributing political patronage, by appealing to the American people, his Gettysburg Address became an iconic call for nationalism, equal rights and democracy. He suspended habeas corpus, he averted British intervention by defusing the Trent Affair. Lincoln supervised the war effort, including the selection of generals and the naval blockade that shut down the South's trade; as the war progressed, he maneuvered to end slavery, issuing the Emancipation Proclamation of 1863. Lincoln managed his own re-election campaign, he sought to reconcile his damaged nation by avoiding retribution against the secessionists.
A few days after the Battle of Appomattox Court House, he was shot by John Wilkes Booth, an actor and Confederate sympathizer, on April 14, 1865, died the following day. Abraham Lincoln is remembered as the United States' martyr hero, he is ranked both by scholars and the public as among the greatest U. S. presidents. Abraham Lincoln was born on February 12, 1809, as the second child of Thomas and Nancy Hanks Lincoln, in a one-room log cabin on Sinking Spring Farm near Hodgenville, Kentucky, he was a descendant of Samuel Lincoln, an Englishman who migrated from Hingham, Norfolk, to its namesake Hingham, Massachusetts, in 1638. Samuel's grandson and great-grandson began the family's westward migration, passing through New Jersey and Virginia. Lincoln's paternal grandfather and namesake, Captain Abraham Lincoln, moved the family from Virginia to Jefferson County, Kentucky, in the 1780s. Captain Lincoln was killed in an Indian raid in 1786, his children, including eight-year-old Thomas, Abraham's father, witnessed the attack.
Thomas worked at odd jobs in Kentucky and in Tennessee, before settling with members of his family in Hardin County, Kentucky, in the early 1800s. Lincoln's mother, Nancy, is assumed to have been the daughter of Lucy Hanks, although no record documents this. Thomas and Nancy married on June 12, 1806, in Washington County, moved to Elizabethtown, Kentucky, they produced three children: Sarah, born on February 10, 1807. Thomas Lincoln leased farms in Kentucky. Thomas became embroiled in legal disputes, lost all but 200 acres of his land in court disputes over property titles. In 1816, the family moved to Indiana, where the survey process was more reliable and land titles were more secure. Indiana was a "free" territory, they settled in an "unbroken forest" in Hurricane Township, Perry County. In 1860, Lincoln noted that the family's move to Indiana was "partly on account of slavery", but due to land title difficulties. In Kentucky and Indiana, Thomas worked as a farmer and carpenter, he owned farms, town lots and livestock, paid taxes, sat on juries, appraised estates, served on country slave patrols, guarded prisoners.
Thomas and Nancy were members of a Separate Baptists church, which forbade alcohol and slavery. Overcoming financial challenges, Thomas obtained clear title to 80 acres of land in what became known as the Little Pigeon Creek Community. On October 5, 1818, Nancy Lincoln died of milk sickness, leaving 11-year-old Sarah in charge of a household that included her father, 9-year-old Abraham, Dennis Hanks, Nancy's 19-year-old orphaned cousin; those who knew Lincoln recalled that he was distraught over his sister's death on January 20, 1828, while giving birth to a stillborn son. On December 2, 1819, Thomas married Sarah "Sally" Bush Johnston, a widow from Elizabethtown, with three children of her own. Abraham became close to his stepmother, whom he referred t