breakthroughs throughout push scope to 1 ghz

several design innovations incorporated in a high-speed oscilloscope are discussed including the micro-channel-plate and scan-expansion lens, and special high-frequency packaging instead of p/c boards

electrokinetic studies of cellulosic fibres $em dash$ 2 surface charge density of fibres dyed with reactive dyes

results on changes in s. c. d. of the cotton fibers dyed with reactive dyes have been reported. in general, the s. c. d. decreased as a result of the reaction between dye and fiber, the decrease being proportional to the concentration of the dye in the fiber. these results have been explained on the basis of the reduction in the effective..

pop can plot sprayer

the four-row plot sprayer for cotton described utilizes pressurized cans from the carbonated beverage industry to speed up the experimental application of harvest aid chemicals, reduce the land needed for alleyways, and avoid unnecessary soil compaction

chemical modification of polymers with flame-retardant compounds

this comprehensive, literature-based, review of the fireproofing of natural and synthetic polymers and related products is presented in 13 parts. they include $em dash$ introduction, definition of terms (thermal degradation and combustion, chemical modification, polymer flammability, test procedures); scope of the review; pyrolysis, therm..

crude unit treatment programs help conserve energy

one of the major potential sources of energy conservation in refineries is the crude unit. the author discusses mechanical and operating changes, such as improving reflux rates, controlling furnace air-to-fuel ratios and optimizing stripping steam use as methods to increase crude unit efficiency. another way to improve efficiency is throu..

silicone rubber pressure pads cut pc board lamination costs

manufactuers of printed circuit laminates are saving money and time by using silicone rubber pressure pads that assure uniform distribution of pressure across the entire surface of the laminate. a conventional p/c board consists of several sheets of epoxy impregnated glass fabric and a top sheet of conductive copper foil loaded into a pre..

impacts of increasing energy scarcity in irrigated agriculture: an empirical study from the arid southwest

impacts of increasing gas curtailments and rising gas and electricity prices on farm profits, and on adjustments in crop patterns, water and energy use made in response to greater energy scarcity, were estimated for farms in pinal country, arizona. linear programming was used to estimate the profit maximizing acreage of alfalfa, upland co..

utilisation des cavites a passages multiples dans des expperiences d'absorption saturee. echelle de frequence et ligne a retard. $left bracket$ use of multi-path optical cavities in some saturated absorption experiments. frequency scale and optical dela

the realization of a multi-path cavity and the results obtained in the case of saturated absorption experiments are presented. two problems are studied and resolved: frequency calibration of a wide range tunable laser and realization of a long optical delay line other applications are planed, in particular the study of delayed spectral pr..

effect of thermal treatment on the properties of sugar cane bagasse hardboard

thermal treatment of sugar cane bagasse hardboard reduces strength, but water resistance is improved, whether the boards are manufactured with or without resin. bending strength of boards made with high ratio of resin shows a different behavior, toward hardening, than boards made from rice straw or cotton stalks theories are proposed to e..

pc board profiling systems

the article examines the latest advances in p/c board profiling systems, encompassing techniques such as routing, blanking, shearing, notching and beveling. automated numerically controlled routers are increasing in popularity, but pin routing and blanking systems remain widely used. production volume and board complexity determine the se..