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الموضوع: تقرير عن transport

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    افتراضي تقرير عن transport


    تقرير عن transport


    _______________________________________________

    Transport or transportation is the movement of people and goods from one place to another. The term is derived from the Latin trans ("across") and portare ("to carry"). Industries which have the business of providing equipment, actual transport, transport of people or goods and services used in transport of goods or people make up a large broad and important sector of most national economies, and are collectively referred to as transport industries.

    Aspects of transport
    The field of transport has several aspects: loosely they can be divided into a triad of infrastructure, vehicles, and operations. Infrastructure includes the transport networks (roads, railways, airways, waterways, canals, pipelines, etc.) that are used, as well as the nodes or terminals (such as airports, railway stations, bus stations and seaports). The vehicles generally ride on the networks, such as automobiles, bicycles, buses, trains, aircraft. The operations deal with the way the vehicles are operated on the network and the procedures set for this purpose including the legal environment (Laws, Codes, Regulations, etc.) Policies, such as how to finance the system (for example, the use of tolls or gasoline taxes) may be considered part of the operations.

    Broadly speaking, the design of networks are the world's future. Domains of civil engineering and urban planning, the design of vehicles of mechanical engineering and specialized subfields such as nautical engineering and aerospace engineering, and the operations are usually specialized, though might appropriately belong to operations research or systems engineering.
    Modes and categories
    Main article: Mode of transport
    Modes are combinations of networks, vehicles, and operations, and include walking, the road transport system, rail transport, ship transport and modern aviation.

    Air transport
    Cable transport
    Conveyor transport
    Human-powered transport
    Hybrid transport
    New Mobility Agenda
    Rail transport
    Road transport, including human-powered transport such as walking and cycling
    Ship transport
    Space transport
    Sustainable transportation
    Transport on other planets
    Proposed future transport
    Animal-powered transport
    Animal-powered transport is a broad category of the human use of non-human working animals (also known as "beasts of burden") for the movement of people and goods. Humans may ride some of the larger of these animals directly, use them as pack animals for carrying goods, or harness them, singly or in teams, to pull (or haul) sleds or wheeled vehicles.

    Air transport
    Main article: Air transport
    A fixed-wing aircraft, commonly called airplane or aeroplane, is a heavier-than-air craft where movement of the wings in relation to the aircraft is not used to generate lift. The term is used to distinguish from rotary-wing aircraft, where the movement of the lift surfaces relative to the aircraft generates lift. A more rare type of aircraft that is neither fixed-wing nor rotary-wing is an ornithopter. A heliplane is both fixed-wing and rotary-wing.


    A Cessna 177 propeller-driven general aviation aircraftFixed-wing aircraft include a large range of craft from small trainers and recreational aircraft to large airliners and military cargo aircraft. Some aircraft use fixed wings to provide lift only part of the time and may or may not be referred to as fixed-wing.

    The current term also embraces aircraft with folding the wings that are intended to fold when on the ground. This is usually to ease storage or facilitate transport on, for example, a vehicle trailer or the powered lift connecting the hangar deck of an aircraft carrier to its flight deck. It also embraces aircraft, such as the General Dynamics F-111, Grumman F-14 Tomcat and the Panavia Tornado, which can vary the sweep angle of their wings during flight. These aircraft are termed "variable geometry" aircraft. When the wings of these aircraft are fully swept, usually for high speed cruise, the trailing edges of their wings about the leading edges of their tailplanes, giving an impression of a single delta wing if viewed in plan. There are also rare examples of aircraft which can vary the angle of incidence of their wings in flight, such the F-8 Crusader, which are also considered to be "fixed-wing".

    Two necessities for all fixed-wing aircraft (as well as rotary-wing aircraft) are air flow over the wings for lifting of the aircraft, and an open area for landing. The majority of aircraft, however, also need an airport with the infrastructure to receive maintenance, restocking, refueling and for the loading and unloading of crew, cargo and/or passengers. While the vast majority of aircraft land and take off on land, some are capable of take off and landing on ice, snow and calm water.

    The aircraft is the second fastest method of transport, after the rocket. Commercial jet aircraft can reach up to 875 km/h. Single-engine aircraft are capable of reaching 175 km/h or more at cruise speed. Supersonic aircraft (military, research and a few private aircraft) can reach speeds faster than sound. The record is currently held by the SR-71 with a speed of 3,529.56 km/h (2193.17 mph, 1905.81 knots).[1]

    Rail
    Main article: Rail transport
    Rail transport is the transport of passengers and goods along railways or railroads. A typical railway (or railroad) track consists of two parallel steel (or in older networks, iron) rails, generally anchored perpendicular to beams (termed sleepers or ties) of timber, concrete, or steel to maintain a consistent distance apart, or gauge. The rails and perpendicular beams are usually then placed on a foundation made of concrete or compressed earth and gravel in a bed of ballast to prevent the track from buckling (bending out of its original configuration) as the ground settles over time beneath and under the weight of the vehicles passing above. The vehicles traveling on the rails are arranged in a train; a series of individual powered or unpowered vehicles linked together, displaying markers. These vehicles (referred to, in general, as cars, carriages or wagons) move with much less friction than on rubber tires on a paved road, and the locomotive that pulls the train tends to use energy far more efficiently as a result.


    Acela Express, an American high-speed passenger trainIn rail transport, a train consists of rail vehicles that move along guides to transport freight or passengers from one place to another. The guideway (permanent way) usually consists of conventional rail tracks, but might also be monorail or maglev. Propulsion for the train is provided by a separate locomotive, or from individual motors in self-propelled multiple units. Most trains are powered by diesel engines or by electricity supplied by trackside systems. Historically the steam engine was the dominant form of locomotive power through the mid-20th century, but other sources of power (such as horses, rope (or wire), gravity, pneumatics, or gas turbines) are possible
    Road transport
    Main article: Road transport

    [edit] Automobile
    An automobile is a wheeled passenger vehicle that carries its own motor. Different types of automobiles include cars, buses, trucks, and vans. Some include motorcycles in the category, but cars are the most typical automobiles. As of 2002 there were 590 million passenger cars worldwide (roughly one car for every ten people), of which 170 million in the U.S. (roughly one car for every two people) [1].

    The automobile was thought of as an environmental improvement over horses when it was first introduced in the 1890s. Before its introduction, in New York City alone, more than 1,800 tons of manure had to be removed from the streets daily, although the manure was used as natural fertilizer for crops and to build top soil. In 2006, the automobile is recognized as one of the primary sources of world-wide air pollution and a cause of substantial noise pollution and adverse health effects.


    [edit] See also
    Bicycle
    Bus
    Carpooling
    Cycling
    Human-powered transport
    Limousine
    Road train
    Share taxi
    Semi-trailer truck
    Taxicab
    Truck

    [edit] Water transport
    Main article: Ship transport

    [edit] Watercraft
    A watercraft is a vehicle designed to float on and move across (or under) water. The need for buoyancy unites watercraft, and makes the hull a dominant aspect of its construction, maintenance, and appearance.

    Most watercraft would be described as either ships or boats; although nearly all ships are larger than nearly all boats, the distinction between those two categories is not one of size per se.

    A rule of thumb says "a boat can fit on a ship, but a ship can't fit on a boat", and a ship usually has sufficient size to carry its own boats, such as lifeboats, dinghies, or runabouts.
    Often local law and regulation will define the exact size (or the number of masts) that distinguishes a ship from boats.
    Traditionally submarines, being small, were called "boats"; in contrast, nuclear-powered submarines' are large, much roomier, and classed as ships.
    Another definition says a ship is any floating craft that transports cargo for the purpose of earning revenue; in that context, passenger ships transport "supercargo", another name for passengers or persons not working on board. However, neither fishing boats nor ferries are considered ships, though both carry cargo (their catch of the day or passengers) and lifeboats.

    English seldom uses the term watercraft to describe any specific individual ****** (and probably then only as an affectation): rather the term serves to unify the category that ranges from small boats to the largest ships, and also includes the diverse watercraft for which some term even more specific than ship or boat (e.g., canoe, kayak, raft, barge, jet ski) comes to mind first. (Some of these would even be considered at best questionable as examples of boats.)


    [edit] Ship transport
    Ship transport is the process of moving people, goods, etc. by barge, boat, ship or sailboat over a sea, ocean, lake, canal or river. This is frequently undertaken for purposes of commerce, recreation or military ******ives.

    A hybrid of ship transport and road transport is the historic horse-drawn boat. Hybrids of ship transport and air transport are kite surfing and parasailing.

    The first craft were probably types of canoes cut out from tree trunks. The colonization of Australia by Indigenous Australians provides indirect but conclusive evidence for the latest date for the invention of ocean-going craft; land bridges linked southeast Asia through most of the Malay Archipelago but a strait had to be crossed to arrive at New Guinea, which was then linked to Australia. Ocean-going craft were required for the colonization to happen.

    Early sea transport was accomplished with ships that were either rowed or used the wind for propulsion, and often, in earlier times with smaller vessels, a combination of the two.

    Also there have been horse-powered boats, with horses on the deck providing power [2].

    Ship transport was frequently used as a mechanism for conducting warfare. Military use of the seas and waterways is covered in greater detail under navy.





    In the 1800s the first steam ships were developed, using a steam engine to drive a paddle wheel or propeller to move the ship. The steam was produced using wood or coal. Now most ships have an engine using a slightly refined type of petroleum called bunker fuel. Some specialized ships, such as submarines, use nuclear power to produce the steam.

    Recreational or educational craft still use wind power, while some smaller craft use internal combustion engines to drive one or more propellers, or in the case of jet boats, an inboard water jet. In shallow draft areas, such as the Everglades, some craft, such as the hovercraft, are propelled by large pusher-prop fans.

    Although relatively slow, modern sea transport is a highly effective method of transporting large quantities of non-perishable goods. Transport by water is significantly less costly than transport by air for trans-continental shipping.

    In the context of sea transport, a road is an anchorage.


    [edit] See also
    Water taxi
    Short sea shipping

    [edit] Intermodal transport
    Main article: Intermodal transport
    Intermodal freight transport refers to the combination of multiple types of transportation for a single shipment, for instance a shipment in a container may start on a truck in China, travel in a cargo ship over the Pacific Ocean to a port city in the U.S., then travel by train to the East Coast, finally being delivered by a truck.


    [edit] Transport and communications
    Transport and communication are both substitutes and complements. Though it might be possible that sufficiently advanced communication could substitute for transport, one could telegraph, telephone, fax, or email a customer rather than visiting them in person, it has been found that those modes of communication in fact generate more total interactions, including interpersonal interactions. The growth in transport would be impossible without communication, which is vital for advanced transportation systems, from railroads which want to run trains in two directions on a single track, to air traffic control which requires knowing the ******** of aircraft in the sky. Thus, it has been found that the increase of one generally leads to more of the other.


    [ Transport and land use
    The first Europeans who came to the New World brought with them a culture of transportation centred on the wheel. North America's Aboriginal peoples had developed differently, and moved through their country by means of canoes, kayaks, umiaks, coracles, and other water-borne vehicles, constructed from various types of bark, hide, bone, wood, and other materials; as well, the snowshoe, toboggan and sled were essential during the winter conditions that prevailed throughout the northern half of the continent for much of the year. Europeans quickly adopted all of these technologies themselves, and therefore were able to travel to the northern interior of Canada via the many waterways that branched out from the St. Lawrence River and from Hudson Bay.[2]

    There is a well-known relationship between the density of development, and types of transportation. Intensity of development is often measured by area of floor area ratio (FAR), the ratio of usable floorspace to area of land. As a rule of thumb, FARs of 1.5 or less are well suited to automobiles, those of six and above are well suited to trains. The range of densities from about two up to about four is not well served by conventional public or private transport. Many cities have grown into these densities, and are suffering traffic problems.

    Land uses support activities. Those activities are spatially separated. People need transport to go from one to the other (from home to work to shop back to home for instance). Transport is a "derived demand," in that transport is unnecessary but for the activities pursued at the ends of trips. Good land use keeps common activities close (e.g. housing and food shopping), and places higher-density development closer to transportation lines and hubs. Poor land use concentrates activities (such as jobs) far from other destinations (such as housing and shopping).

    There are economies of agglomeration. Beyond transportation some land uses are more efficient when clustered. Transportation facilities consume land, and in cities, pavement (devoted to streets and parking) can easily exceed 20 percent of the total land use. An efficient transport system can reduce land waste.

    References
    ^ FAI.org
    ^ Virtual Vault, an online exhibition of Canadian historical art at Library and Archives
    ^ http://www.uae7.com/vb


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  2. #2
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  3. #3
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  4. #4
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    افتراضي رد: تقرير عن transport


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    يسلمو ع التقرير ...

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  7. #7
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  8. #8
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    مشكورة ما قصرتي
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  9. #9
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    افتراضي رد: تقرير عن transport


    هذا البحث موت عندي واحد اسهل





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    إذا ضاقت بك الدنيا فلا تقل :


    يارب عندي هم كبير .... ولكن قل :

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    إن مرت الأيام ولم تروني فهذه مشاركاتي تذكروني..


    وإن غبت ولم تجدوني اكون وقتها بحاجة للدعاء فدعواكم


    و لا تنسوني. .

  10. #10
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    افتراضي رد: تقرير عن transport


    هذا اسهل منه ومع البور بونت





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    إن مرت الأيام ولم تروني فهذه مشاركاتي تذكروني..


    وإن غبت ولم تجدوني اكون وقتها بحاجة للدعاء فدعواكم


    و لا تنسوني. .

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