Electricity consumption is often the hotspot of life cycle assessment (LCA) of products, industrial activities, or services. The objective of this paper is to provide a consistent, scientific, region-specific electricity-supply-based inventory of electricity generation technology for national and regional power grids. Marginal electricity generation technology is pivotal in assessing impacts re...

Let θ(n) denote the number of compositions (ordered partitions) of a positive integer n into powers of 2. It appears that the function θ(n) satisfies many congruences modulo 2 . For example, for every integer a there exists (as k tends to infinity) the limit of θ(2 + a) in the 2−adic topology. The parity of θ(n) obeys a simple rule. In this paper we extend this result to higher powers of 2. In ...

The power amplifiers in a sound system will be responsible for increasing the input to a certain level at which the speaker can play audio in a space with adequate sound pressure. When these spaces are wide, it takes a lot of pressure and this requires a high power, which should be given to the speaker without causing a variation in the pattern of the input signal. To achieve this goal is mainl...

This paper is aimed at analyzing the possible power options and configurations for remote locations in the oil and gas industry with the view of proposing a cost effect power supply option suitable for the different operational requirements at these remote locations. It reviews the different power options available and presents selection criteria for the optimum choice of power generation techn...