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Acueducto De Albear
The Acueducto de Albear is the name of a water supply system of the city of Havana, Cuba, built in the 19th century by Francisco de Albear. Background At the beginning of the 19th century, there was a severe shortage of water. After having negotiated with several French engineers in 1852, the Governor of Cuba José Gutiérrez de la Concha decided to create a commission to propose solutions for the water supply. The commission was to be chaired by Francisco de Albear, at that time colonel of the Corps of Engineers of the Spanish army and chairman of the Public Works Committee of Cuba. His main assistant was José Luis Casaseca, Director of the Institute of Chemical Investigations of Havana. The construction of a new water supply system was a necessity for the improvement of the sanitary conditions of the city. There had been severe outbreaks of cholera in 1850, 1856, 1865 and 1867-1870. The mortality due to dysentery and other waterborne diseases. Investigation The investig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Havana
Havana (; Spanish: ''La Habana'' ) is the capital and largest city of Cuba. The heart of the La Habana Province, Havana is the country's main port and commercial center.Cuba ''''. . The city has a population of 2.3million inhabitants, and it spans a total of – making it the largest city by area, the most populous city, and the [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Board Of Directors
A board of directors (commonly referred simply as the board) is an executive committee that jointly supervises the activities of an organization, which can be either a for-profit or a nonprofit organization such as a business, nonprofit organization, or a government agency. The powers, duties, and responsibilities of a board of directors are determined by government regulations (including the jurisdiction's corporate law) and the organization's own constitution and by-laws. These authorities may specify the number of members of the board, how they are to be chosen, and how often they are to meet. In an organization with voting members, the board is accountable to, and may be subordinate to, the organization's full membership, which usually elect the members of the board. In a stock corporation, non-executive directors are elected by the shareholders, and the board has ultimate responsibility for the management of the corporation. In nations with codetermination (such as Germ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pact Of Zanjón
The Pact of Zanjón ended the armed struggle of Cubans for independence from the Spanish Empire that lasted from 1868 to 1878, the Ten Years' War. On February 10, 1878, a group of negotiators representing the rebels gathered in Zanjón, a village in Camagüey Province, and signed the document offered them by the Spanish commander in Cuba, General Arsenio Martínez Campos, who had arrived in the Spanish colony two years earlier and immediately sought to come to terms with the rebels. The end of hostilities did not represent a military victory for either side, but a recognition by both sides of their "mutual exhaustion". A small group of anti-Spanish insurgents in Oriente led by Lt. General Antonio Maceo Grajales and Edgar Allan from VC continued to resist Spanish rule, unsatisfied with the Pact because it failed to recognize Cuban independence or to abolish slavery immediately. They argued their case without success in a meeting known as the on March 15. Maceo fled Cuba for Jamaic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ten Years' War
The Ten Years' War ( es, Guerra de los Diez Años; 1868–1878), also known as the Great War () and the War of '68, was part of Cuba's fight for independence from Spain. The uprising was led by Cuban-born planters and other wealthy natives. On 10 October 1868, sugar mill owner Carlos Manuel de Céspedes and his followers proclaimed independence, beginning the conflict. This was the first of three liberation wars that Cuba fought against Spain, the other two being the Little War (1879–1880) and the Cuban War of Independence (1895–1898). The final three months of the last conflict escalated with United States involvement, leading to the Spanish–American War. Background Slavery Cuban business owners demanded fundamental social and economic reforms from Spain, which ruled the colony. Lax enforcement of the slave trade ban had resulted in a dramatic increase in imports of Africans, estimated at 90,000 slaves from 1856 to 1860. This occurred despite a strong abolitionist m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Havana Map, Showing Plan Of Water Main Distribution, Cuba 1899
Havana (; Spanish: ''La Habana'' ) is the capital and largest city of Cuba. The heart of the La Habana Province, Havana is the country's main port and commercial center.Cuba ''The World Factbook''. Central Intelligence Agency. The city has a population of 2.3million inhabitants, and it spans a total of – making it the largest city by area, the most populous city, and the List of metropolitan areas in the West Indies, fourth largest metropolitan area in the Caribbean region. The city of Havana was founded by the Spanish Empire, Spanish in the 16th century, it served as a springboard for the Spanish colonization of the Americas, Spanish conquest of the Americas becoming a stopping point for Spanish galleons returning to Spain. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Discharge (hydrology)
In hydrology, discharge is the volumetric flow rate of water that is transported through a given cross-sectional area. It includes any suspended solids (e.g. sediment), dissolved chemicals (e.g. CaCO3(aq)), or biologic material (e.g. diatoms) in addition to the water itself. Terms may vary between disciplines. For example, a fluvial hydrologist studying natural river systems may define discharge as streamflow, whereas an engineer operating a reservoir system may equate it with outflow, contrasted with inflow. Theory and calculation A discharge is a measure of the quantity of any fluid flow over unit time. The quantity may be either volume or mass. Thus the water discharge of a tap (faucet) can be measured with a measuring jug and a stopwatch. Here the discharge might be 1 litre per 15 seconds, equivalent to 67 ml/second or 4 litres/minute. This is an average measure. For measuring the discharge of a river we need a different method and the most common is the 'area-velocity' method. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Slope
In mathematics, the slope or gradient of a line is a number that describes both the ''direction'' and the ''steepness'' of the line. Slope is often denoted by the letter ''m''; there is no clear answer to the question why the letter ''m'' is used for slope, but its earliest use in English appears in O'Brien (1844) who wrote the equation of a straight line as and it can also be found in Todhunter (1888) who wrote it as "''y'' = ''mx'' + ''c''". Slope is calculated by finding the ratio of the "vertical change" to the "horizontal change" between (any) two distinct points on a line. Sometimes the ratio is expressed as a quotient ("rise over run"), giving the same number for every two distinct points on the same line. A line that is decreasing has a negative "rise". The line may be practical – as set by a road surveyor, or in a diagram that models a road or a roof either as a description or as a plan. The ''steepness'', incline, or grade of a line is measured by the absolute ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Width
Length is a measure of distance. In the International System of Quantities, length is a quantity with dimension distance. In most systems of measurement a base unit for length is chosen, from which all other units are derived. In the International System of Units (SI) system the base unit for length is the metre. Length is commonly understood to mean the most extended dimension of a fixed object. However, this is not always the case and may depend on the position the object is in. Various terms for the length of a fixed object are used, and these include height, which is vertical length or vertical extent, and width, breadth or depth. Height is used when there is a base from which vertical measurements can be taken. Width or breadth usually refer to a shorter dimension when length is the longest one. Depth is used for the third dimension of a three dimensional object. Length is the measure of one spatial dimension, whereas area is a measure of two dimensions (length square ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cross Section (geometry)
In geometry and science, a cross section is the non-empty intersection of a solid body in three-dimensional space with a plane, or the analog in higher-dimensional spaces. Cutting an object into slices creates many parallel cross-sections. The boundary of a cross-section in three-dimensional space that is parallel to two of the axes, that is, parallel to the plane determined by these axes, is sometimes referred to as a contour line; for example, if a plane cuts through mountains of a raised-relief map parallel to the ground, the result is a contour line in two-dimensional space showing points on the surface of the mountains of equal elevation. In technical drawing a cross-section, being a projection of an object onto a plane that intersects it, is a common tool used to depict the internal arrangement of a 3-dimensional object in two dimensions. It is traditionally crosshatched with the style of crosshatching often indicating the types of materials being used. With computed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oval
An oval () is a closed curve in a plane which resembles the outline of an egg. The term is not very specific, but in some areas (projective geometry, technical drawing, etc.) it is given a more precise definition, which may include either one or two axes of symmetry of an ellipse. In common English, the term is used in a broader sense: any shape which reminds one of an egg. The three-dimensional version of an oval is called an ovoid. Oval in geometry The term oval when used to describe curves in geometry is not well-defined, except in the context of projective geometry. Many distinct curves are commonly called ovals or are said to have an "oval shape". Generally, to be called an oval, a plane curve should ''resemble'' the outline of an egg or an ellipse. In particular, these are common traits of ovals: * they are differentiable (smooth-looking), simple (not self-intersecting), convex, closed, plane curves; * their shape does not depart much from that of an ellipse, and * an o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water Tower
A water tower is an elevated structure supporting a water tank constructed at a height sufficient to pressurize a water distribution system, distribution system for potable water, and to provide emergency storage for fire protection. Water towers often operate in conjunction with underground or surface service reservoirs, which store treated water close to where it will be used. Other types of water towers may only store raw (non-potable) water for fire protection or industrial purposes, and may not necessarily be connected to a public water supply. Water towers are able to supply water even during power outages, because they rely on hydrostatic pressure produced by elevation of water (due to gravity) to push the water into domestic and industrial water distribution systems; however, they cannot supply the water for a long time without power, because a pump is typically required to refill the tower. A water tower also serves as a reservoir to help with water needs during peak us ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
