multiple-criteria decision-making mcdm or multiple-criteria decision analysis mcda is a sub-discipline of operations research that explicitly evaluates multiple conflicting criteria in decision making both in daily life and in settings such as business, government and medicine . conflicting criteria are typical in evaluating options: cost or price is usually one of the main criteria, and .
the centralisation can be done with a position or at a level in an organisation. ideally, the decision-making power is held by a few individuals. advantages and disadvantages of the centralisation of authority. centralisation of authority has several advantages and disadvantages. the benefits include:
anfo has found wide use in coal mining, quarrying, metal mining, and civil construction in applications where its low cost and ease of use may outweigh the benefits of other explosives, such as water resistance, oxygen balance, higher detonation velocity, or performance in small-diameter columns. anfo is also widely used in avalanche hazard .
other stabilization techniques include using on-site materials including sub-soils, sands, mining waste, natural stone industry waste and crushed construction waste to provide stable, dust free local roads for complete dust control and soil stabilization. there are advantages and disadvantages to many of these soil stabilizers.
hashcash is a proof-of-work system used to limit email spam and denial-of-service attacks, and more recently has become known for its use in bitcoin and other cryptocurrencies as part of the mining algorithm.hashcash was proposed in 1997 by adam back and described more formally in back's 2002 paper 'hashcash - a denial of service counter-measure'.
advantages of bhm the main advantages of bhm include its low capital cost, mobility, selectivity, ability to work in hazardous and dangerous conditions and low environmental impact. the method has been used in mining of such natural resources and industrial materials as: uranium , iron ore, quartz sand , gravel, coal, poly-metallic ores, phosphate , gold, diamonds, rare earths, amber and several more.
in 2004, a number of mining workers in kakadu became ill after potable water at the mine site became contaminated with process water. as of march 2009, the ranger uranium mine is leaking 100,000 litres per day of contaminated water into the ground beneath the kakadu national park, according to a government appointed scientist.
copper is usually leached using acid sulfuric acid or hydrochloric acid , then recovered from solution by solvent extraction electrowinning sx-ew or by chemical precipitation. ores most amenable to leaching include the copper carbonates malachite and azurite, the oxide tenorite, and the silicate chrysocolla.
in computer science, brute-force search or exhaustive search, also known as generate and test, is a very general problem-solving technique and algorithmic paradigm that consists of systematically enumerating all possible candidates for the solution and checking whether each candidate satisfies the problem's statement.. a brute-force algorithm to find the divisors of a natural number n would .
kakadu national park, located in the northern territory of australia, possesses within its boundaries a number of large uranium deposits. the uranium is legally owned by the australian government, and is sold internationally, having a large effect on the australian economy.the mining has been controversial, due to the widespread publicity regarding the potential danger of nuclear power and .
advantages and disadvantages. perhaps the most cited advantage of automation in industry is that it is associated with faster production and cheaper labor costs. another benefit could be that it replaces hard, physical, or monotonous work.
advantages. room and pillar mining is not particularly dependent on the depth of the deposit. at particularly deep depths, room and pillar mining can be more cost effective compared to strip mining due to the fact that significantly less overburden needs to be removed.
the company simply collects the ions out of the solution after the bacteria have finished. there is a limited amount of ores. advantages. economical: bioleaching is in general simpler and, therefore, cheaper to operate and maintain than traditional processes, since fewer specialists are needed to operate complex chemical plants.
advantages disadvantages; reduced flooding, soil saturation, erosion & improved growing conditions. the two stage drainage ditch, with the introduction of the benches, creates a larger area on a cross-sectional basis than the existing, natural, trapezoidal channel.