The Delphi survey is a systematic methodology that uses a sequential set of questionnaires with controlled feedback, in an iterative and interactive manner (Lindstone & Turoff 1975).
In essence, the procedure comprises several sequences of questionnaires or rounds to a group of experts within a specific field, with controlled feedback from the researcher.
One song turns into an avant-garde experiment with Miller's party trick: using two mobile phones to create an electronic storm of controlled feedback and uncontrolled bleeping.
The method applied demonstrated the possibility to build nanogaps under 3 nm with controlled feedback, having a good statistical yield with about the 80% of the nanogaps below 10 nm (Figure 9).
The methodology originated in the early 1950's, when an Air Force-sponsored Rand project, titled "Project Delphi" sought to reach consensus, through a series of questionnaires and controlled feedback, among military experts on possible U.S. industrial targets for attacks from Russia [ 26].
Delphi procedures aim to obtain the most reliable consensus amongst a group of experts by a series of questionnaires interspersed with controlled feedback.
Second, by measuring the current at a high sample rate and using this information to control the voltage supply we can build a controlled loop feedback mechanism.
The Delphi method uses a series of surveys interspersed with controlled feedback designed to gather information and build consensus without requiring face-to-face meetings.
To develop the consensus-based criteria, this study will use an iterative, anonymous, multistaged approach with controlled feedback.
The Delphi procedure is basically a series of sequential questionnaires or 'rounds', interspersed by controlled feedback, that seeks to achieve consensus of opinion among a panel of experts [ 37].
The investigators used a Finapres, a sophisticated and expensive device based on the volume clamp method, which employs photoplethysmography in a servo-controlled feedback of an inflatable finger cuff.
