Automobile dependence

Kenworthy, J. R. Laube, F. B. Barter, P. Newman, P. Raad, T. Pnbnnn, C. and Guia, B. (2000). An International Sourcebook of Automobile Dependence in Cities, 1960-1990. Boulder, CO University Press of Colorado. 

Newman, P., and J. Kenworthy. Sustainability and cities Overcoming automobile dependence. 1999, Island Press, Washington, DC. 

In every part of the world, the same type of classification as above is found for fuels premium or regular, with or without lead. The octane numbers can be different from one country to another depending on the extent of development of their car populations and the capabilities of their local refining industries. The elimination of lead is becoming the rule wherever there are large automobile populations and severe anti-pollution requirements. Thus the United States, Japan and Canada no longer distribute leaded fuels. (... 

Consider again, for example, the case of the flat tire on an automobile. The initiating event in this case is the flat tire. There are two safety functions which can be defined a spare tire and an emergency road patrol. Other safety functions might be included depending on the particular situation. 

Flexible foams are resiUent open-ceU stmctures with densities varying from 25—650 kg/m, depending on the choice of the raw materials. Most flexible foams are produced in the form of a slab or bun in a contiauous process in widths up to 2.4 m and thicknesses up to 1.2 m. A Hquid foamable mixture is pumped onto a conveyor, which moves through a tunnel where reaction and foaming occur (101). Similar mixtures can be placed in a mold and allowed to foam. This process is used in the manufacture of automobile seats (see Foamed plastics). 

Under modern condition the ordinary layman...has neither the opportunity nor the capacity to inspect or to determine the fitness of an automobile for use he must rely on the manufacturer who has control of its construction, and to some degree on the dealer who, to the limited extent called for by the manufacturer s instructions, inspects and services it before delivery. In such a marketing milieu his remedies and those of persons who properly claim through him should not depend "upon the intricacies of the law of sales. The obligation of the manufacturer should not be based alone on privity of contract. It should rest, as was once said,... 

In certain diseases, such as osteomalacia, syphilis, and osteomyeHtis, bones break spontaneously and without a trauma. The severity of the fracture usually depends on the force that caused the fracture. If a bone s breaking point was exceeded only slightly, then the bone may crack rather than break all the way through. If the force is extreme, such as in an automobile collision or a gunshot, the bone may shatter. An open or compound fracture is particularly serious because infection is possible in both the wound and the bone. A serious bone infection can result in amputation. 

Many grades of interlayer are produced to meet specific length, width, adhesion, stiffness, surface roughness, color (93,94), and other requirements of the laminator and end use. Sheet can be suppHed with vinyl alcohol content from 15 to about 23 wt %, depending on the suppHer and appHcation. A common interlayer thickness for automobile windshields is 0.76 mm, but interlayer used for architectural or aircraft glaring appHcations, for example, may be much thinner or thicker. There are also special grades to bond rear-view mirrors to windshields (95,96) and to adhere the components of solar cells (97,98). Multilayer coextmded sheet, each component of which provides a separate property not possible in monolithic sheet, can also be made (99—101). 

As corrosion proceeds, reaction by-products may form on the metal surfaces, creating a resistance to electrical exchanges at these surfaces. Consequently, the reaction rate diminishes correspondingly. If the corrosion reaction is stopped, a time-dependent recovery occurs if the reaction is restarted, the initial corrosion rate is reestablished. This effect is often observed in conventional dry cells and automobile batteries. 

Electrochemistry plays an important role in the large domain of. sensors, especially for gas analysis, that turn the chemical concentration of a gas component into an electrical signal. The longest-established sensors of this kind depend on superionic conductors, notably stabilised zirconia. The most important is probably the oxygen sensor used for analysing automobile exhaust gases (Figure 11.10). The space on one side of a solid-oxide electrolyte is filled with the gas to be analysed, the other side... 

When applying Newton s law to a moving automobile, acceleration depends on the excess of power over that required for constant-speed driving, namely P -P,.. From this it follows that the instantaneous acceleration (a) of the vehicle at a given road speed (V) is... 

Higher incomes, higher automobile ownership, and a decline in the population and workplaces that can be sciwcd by mass transit has lead to the declining mass transit demand. Criticism of this shift toward the private automobile comes mainly because the individual driver receives the short-term benefits (privacy, comfort, speed, and convenience), while the negative social consequences (air pollution, traffic jams, and resource depletion) are shared by all. Moreover, if people drove less, and drove more-fuel-efficient vehicles, the positive national goal of less dependence on imported oil would be achieved. 

Convective heat transfer occurs when a fluid (gas or liquid) is in contact with a body at a different temperature. As a simple example, consider that you are swimming in water at 21°C (70°F), you observe that your body feels cooler than it would if you were in still air at 21°C (70°F). Also, you have observed that you feel cooler in your automobile when the air-conditioner vent is blowing directly at you than when the air stream is directed away from you. Both ot these observations are directly related to convective heat transfer, and we might hypothesize that the rate of energy loss from our body due to this mode of heat transfer is dependent on not only the temperature difference but also the typie of surrounding fluid and the velocity of the fluid. We can thus define the unit heat transfer for convection, q/A, as follows ... 

Matching the supply of transit service to its demand is the primary determinant of the energy efficiency of transit. The demand for transit depends on income levels and land use. As average income rises, so does the value of travel time, and therefore the cost of time spent traveling. Higher incomes also make automobile use more obtainable. 

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