Energy return on investmentIn energy economics and ecological energetics, energy return on investment (EROI), also sometimes called energy returned on energy invested (ERoEI), is the ratio of the amount of usable energy (the exergy) delivered from a particular energy resource to the amount of exergy used to obtain that energy resource. Arithmetically the EROI can be defined as: When the EROI of a source of energy is less than or equal to one, that energy source becomes a net "energy sink", and can no longer be used as a source of energy.
Key-agreement protocolIn cryptography, a key-agreement protocol is a protocol whereby two or more parties can agree on a cryptographic key in such a way that both influence the outcome. If properly done, this precludes undesired third parties from forcing a key choice on the agreeing parties. Protocols that are useful in practice also do not reveal to any eavesdropping party what key has been agreed upon. Many key exchange systems have one party generate the key, and simply send that key to the other party—the other party has no influence on the key.
Chief financial officerThe chief financial officer (CFO) is an officer of a company or organization that is assigned the primary responsibility for managing the company's finances, including financial planning, management of financial risks, record-keeping, and financial reporting. In some sectors, the CFO is also responsible for analysis of data. Some CFOs have the title CFOO for chief financial and operating officer. In the majority of countries, finance directors (FD) typically report into the CFO and FD is the level before reaching CFO.
Financial managementFinancial management is the business function concerned with profitability, expenses, cash and credit, so that the "organization may have the means to carry out its objective as satisfactorily as possible;" the latter often defined as maximizing the value of the firm for stockholders. The discipline is then tasked with the "efficient acquisition and deployment" of both short- and long-term financial resources, to ensure the objectives of the enterprise are achieved.
