This paper analyzes an open pit gold mine project based on the O'Hara cost model. Hypothetical data is proposed based on different authors that have studied open pit gold projects, and variations are proposed acco...This paper analyzes an open pit gold mine project based on the O'Hara cost model. Hypothetical data is proposed based on different authors that have studied open pit gold projects, and variations are proposed according to the probability distributions associated to key variables affecting the NPV, like production level, ore grade, price of ore, and others, so as to see what if, in a gold open pit mine project of 3000 metric tons per day of ore. Two case scenarios were analyzed to simulate the NPV, one where there is low certainty data available, and the other where the information available is of high certainty. Results based on genetic algorithm metaheuristic simulations, which combine basically Montecarlo simulations provided by the Palisade Risk software, the O'Hara cost model, net smelter return and financial analysis tools offered by Excel are reported, in order to determine to which variables of the project is more sensitive the NPV.展开更多
Guests of the Nation is a short story written by Frank O’Connor,a driven and prodigious writer,who was arguably one of Ireland’s most complete man of letters in the 20th century.Despite the fact that he lived a life...Guests of the Nation is a short story written by Frank O’Connor,a driven and prodigious writer,who was arguably one of Ireland’s most complete man of letters in the 20th century.Despite the fact that he lived a life of many facets,he was best known for his short stories.In a life span of 63 years,he produced 11 volumes of short stories,among which the title story of Frank O’Con⁃nor’s landmark collection Guests of the Nation was always widely reviewed,generally in positive terms.As a story set against the background of the Irish War of Independence,Guests of the Nation depicts an extraordinary situation where Irish soldiers and Eng⁃lish hostages become friends.To perform their duty,the Irish guards executed the two English hostages although camaraderie was created among them.This short story has attracted numerous critics to analyze it from different perspectives,each of whom has their own notion on the theme of the story.However,most of the scholars focus on analyzing the characters,few of them have noticed bi⁃nary oppositions in the story.There are several pair of binary oppositions in the story,for instance,enemy and friends,friendship and duty,comedy and tragedy,life and death,etc.Therefore,the present paper will examine it from the perspective of binary oppo⁃sition,in an attempt to tap deep into the conflict between humanity and the national interest,as well as the absurdity of war.展开更多
基金the Mine Planning Research Group–GIPLAMIN-of the Mines Faculty,National University of Colombia
文摘This paper analyzes an open pit gold mine project based on the O'Hara cost model. Hypothetical data is proposed based on different authors that have studied open pit gold projects, and variations are proposed according to the probability distributions associated to key variables affecting the NPV, like production level, ore grade, price of ore, and others, so as to see what if, in a gold open pit mine project of 3000 metric tons per day of ore. Two case scenarios were analyzed to simulate the NPV, one where there is low certainty data available, and the other where the information available is of high certainty. Results based on genetic algorithm metaheuristic simulations, which combine basically Montecarlo simulations provided by the Palisade Risk software, the O'Hara cost model, net smelter return and financial analysis tools offered by Excel are reported, in order to determine to which variables of the project is more sensitive the NPV.
文摘Guests of the Nation is a short story written by Frank O’Connor,a driven and prodigious writer,who was arguably one of Ireland’s most complete man of letters in the 20th century.Despite the fact that he lived a life of many facets,he was best known for his short stories.In a life span of 63 years,he produced 11 volumes of short stories,among which the title story of Frank O’Con⁃nor’s landmark collection Guests of the Nation was always widely reviewed,generally in positive terms.As a story set against the background of the Irish War of Independence,Guests of the Nation depicts an extraordinary situation where Irish soldiers and Eng⁃lish hostages become friends.To perform their duty,the Irish guards executed the two English hostages although camaraderie was created among them.This short story has attracted numerous critics to analyze it from different perspectives,each of whom has their own notion on the theme of the story.However,most of the scholars focus on analyzing the characters,few of them have noticed bi⁃nary oppositions in the story.There are several pair of binary oppositions in the story,for instance,enemy and friends,friendship and duty,comedy and tragedy,life and death,etc.Therefore,the present paper will examine it from the perspective of binary oppo⁃sition,in an attempt to tap deep into the conflict between humanity and the national interest,as well as the absurdity of war.
