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A method to determine optimum heap leach height has resulted from design work for a uranium heap leach project on the Macusani Plateau in south-eastern Peru. An analysis of the optimum heap height estimate details its sensitivity to the constituent variables algebraically, graphically, and, in contour plot format. A comparison is drawn against a Namibian uranium project with design details in the public domain and agreement is found to be reasonable. The leach extraction model and dynamics are analysed in terms of solution to ore ratio (SOR), reaction extent and acid consumption efficiency to address model time dependence loss in the model simplification step. The rate of change in the acid efficiency is used to specify the target extraction and determine leach SOR and leach time. The validity of the optimum height estimate equation is supported by favourable comparison against the spreadsheet calculation results and data from another uranium heap leach project. The estimate is dependent on recovery discount and pad maintenance costs but is independent of theoretical recovery and pad capital costs.

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The current IT and digital technologies such as Mobile Augmented Reality (MAR) enable the overlap of digital and real world information in relation with a topic, in an engaging and efficient manner, and therefore can be used to store intangible heritage and to study it in the context as well. The current paper refers to such an augmentation of cultural information, performed at the Kallatis site, whose ruins, at present mostly covered by the modern town, do not offer sufficient information on the complexity of the Greek civilization. The implementation of a MAR application consisted in defining several points of interest of the important local archaeologic discoveries, which can trigger, for the visitors using our application, an augmentation of the historical site with images and videos. With the current research work, the authors propose and demonstrate that a mobile MAR application can constitute a modern method for providing visitors with an immersive and holistic experience for understanding the local material and intangible heritage.

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