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Cables have this ratio and it is expressed in a percent age in the case of coaxial cables with polyethylene dielectric this ratio is in the range of 65 66 in selecting coaxial cable we must carefully consider not only design criteria but use and application selection of materials in relation to overall design. Power and communication cables is a convenient single source volume written for utility maintenance engineers cable production and design engineers and students to expand their knowledge of both types of cables in the power and communications fields. This item leadership roles and management functions in nursing theory and application by bessie l marquis rn cnaa msn paperback 3699 only 5 left in stock order soon sold by anoka media and ships from amazon fulfillment. Cables have different boundary conditions in classical electrotonic theory cables are assumed to have infinite length one customarily assumes a semi infinite cable with v0 at x0 and only positive values of length x this assumption carries over to the application of cable theory to long axons but most dendrites are relatively short. Shahid beheshti university of medical sciences