Waste rock dumping is very important in the production planning of open-pit mines. This subject is more crucial when there is a potential of acid-forming (PAF) by waste rocks. In such a type of mines, to protect the environment, the PAF materials should be encapsulated by non-harmful rocks. Therefore, block sequencing of the mined materials should be in such a way that both the environmental an...

Last month, in this magazine, this author argued in Fixing Financial Statements: Financial Statement Overhaul that the traditional formats of the primary financial statements—income statement, balance sheet, and cash flow statement—need major redesign to again be useful for meaningful financial analysis, decision-making and value creation. Since the fundamental objective of a business is to inc...

As a general branch of project scheduling problems, resource investment problem (RIP) considers resource availabilities as decision variables to determine a level of employed resources minimizing the costs of the project. In addition to costs (cash outflows), researchers in the later extensions of the RIP took payments (cash inflows) received from clients into account and used the net present v...

Abstract A simulation method (SM), linear programming (LPM), project evaluation methods (PEMs), and whole farm modeling (WFM) were applied to analyze the investment appeal of a biogas on Russian farm. The was evaluated for constant input parameters. efficiency procedure elaborated evaluate maximize efficiency. includes defining optimal state situations “with project” “without project.” main ele...

The installations of the residential photovoltaic (PV) systems with integrated battery energy storage are strongly dependent on their economic profitability. Net Present Value (NPV), which is a metric to evaluate cost-effectiveness PV-battery systems, can be influenced by replacement cost. Thus, lifetime reliability-critical components such as power converters and plays an important role needs ...

Mangroves are recognized as a provider of a variety of products and essential ecosystem services that contribute significantly to the livelihood of local communities. However, over the past decades, mangroves in many tropical areas including the Takalar district, South Sulawesi have degraded and decreased mainly due to conversion to aquaculture. Currently, little is known about the economic ben...

Tanaman talas beneng dengan nama lain Xantoshoma undipes K. Koch muncul sebagai alternatif makanan berkarbohidrat pengganti padi. Melalui diversifikasi pangan, tanaman dapat menjadi salah satu varian yang tersedia di pasar. Talas memiliki kandungan nutrisi cukup bagus, meliputi protein 2,01%, karbohidrat 18,30%, lemak 0,27%, pati 15,21% dan kalori 83,7% kkal. Teknis budidaya menggunakan pola ag...

This paper proposes a hybrid optimization method for optimal allocation of wind turbines (WTs) that combines genetic algorithm (GA) and market-based optimal power flow (OPF). The method jointly maximizes net present value (NPV) related to WTs investment made by WTs’ developers and social welfare (SW) considering different combinations of wind generation and load demand over a year. The GA is va...