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21 buzz group
Gen Mgta small discussion group formed for a specific task such as generating ideas, solving problems, or reaching a common viewpoint on a topic within a specific period of time. The use of buzz groups was first associated with J. D. Phillips and is sometimes known as the Phillips 66 technique. Large groups may be divided into buzz groups after an initial presentation in order to cover different aspects of a topic or maximize participation. Each group appoints a spokesperson to report the results of the discussion to the larger group. Buzz groups are a form of brainstorming. -
22 prototype
Gen Mgtan initial version or working model of a new product or invention. A prototype is constructed and tested in order to evaluate the feasibility of a design and to identify problems that need to be corrected. Building a prototype is a key stage in new product development. -
23 Toyota production system
Opsa manufacturing system, developed by Toyota in Japan after World War II, which aims to increase production efficiency by the elimination of waste in all its forms. The Toyota production system was invented, and made to work, by Taiichi Ohno. Japan’s fledgling car-making industry was suffering from poor productivity, and Ohno was brought into Toyota with an initial assignment of catching up with the productivity levels of Ford’s car plants. In analyzing the problem, he decided that although Japanese workers must be working at the same rate as their American counterparts, waste and inefficiency were the main causes of their different productivity levels. Ohno identified waste in a number of forms, including overproduction, waiting time, transportation problems, inefficient processing, inventory, and defective products. The philosophy of TPS is to remove or minimize the influence of all these elements. In order to achieve this, TPS evolved to operate under lean production conditions. It is made up of soft, or cultural aspects, such as automation with the human touch— autonomation—and hard, or technical, aspects, which include just-in-time, kanban, and production smoothing. Each aspect is equally important and complementary. TPS has proven itself to be one of the most efficient manufacturing systems in the world but although leading companies have adopted it in one form or another, few have been able to replicate the success of Toyota.Abbr. TPS -
24 Torricelli, Evangelista
SUBJECT AREA: Photography, film and optics[br]b. 15 October 1608 Faenza, Italyd. 25 October 1647 Florence, Italy[br]Italian physicist, inventor of the mercury barometer and discoverer of atmospheric pressure.[br]Torricelli was the eldest child of a textile artisan. Between 1625 and 1626 he attended the Jesuit school at Faenza, where he showed such outstanding aptitude in mathematics and philosophy that his uncle was persuaded to send him to Rome to a school run by Benedetto Castelli, a mathematician and engineer and a former pupil of Galileo Galilei. Between 1630 and 1641, Torricelli was possibly Secretary to Giovanni Ciampoli, Galileo's friend and protector. In 1641 Torricelli wrote a treatise, De motugravium, amplifying Galileo's doctrine on the motion of projectiles, and Galileo accepted him as a pupil. On Galileo's death in 1642, he was appointed as mathematician and philosopher to the court of Grand Duke Ferdinando II of Tuscany. He remained in Florence until his early death in 1647, possibly from typhoid fever. He wrote a great number of mathematical papers on conic sections, the cycloid, the logarithmic curve and other subjects, which made him well known.By 1642 Torricelli was producing good lenses for telescopes; he subsequently improved them, and attained near optical perfection. He also constructed a simple microscope with a small glass sphere as a lens. Galileo had looked at problems of raising water with suction pumps, and also with a siphon in 1630. Torricelli brought up the subject again in 1640 and later produced his most important invention, the barometer. He used mercury to fill a glass tube that was sealed at one end and inverted it. He found that the height of mercury in the tube adjusted itself to a well-defined level of about 76 cm (30 in.), higher than the free surface outside. He realized that this must be due to the pressure of the air on the outside surface and predicted that it would fall with increasing altitude. He thus demonstrated the pressure of the atmosphere and the existence of a vacuum on top of the mercury, publishing his findings in 1644. He later noticed that changes in the height of the mercury were related to changes in the weather.[br]Bibliography1641, De motu gravium.Further ReadingT.I.Williams (ed.), 1969, A Biographical Dictionary of Scientists, London: A. \& C.Black.Chambers Concise Dictionary of Scientists, 1989, Cambridge.A Dictionary of Scientific Biography, 1976, Vol. XIII, New York: C.Scribner's Sons.A.Stowers, 1961–2, "Thomas Newcomen's first steam engine 250 years ago and the initial development of steam power", Transactions of the Newcomen Society 34 (provides an account of his mercury barometer).W.E.Knowles Middleton, 1964, The History of the Barometer, Baltimore.RLHBiographical history of technology > Torricelli, Evangelista
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