In describing P movement in soils, workers often use operational categorizations such as "dissolved reactive P", "particulate unreactive P", etc. [1, 2] The abundances of the principal P compounds, expressed as percentages of total P in the soil, are typically in the ranges: orthophosphates 60 – 80%; pyrophosphate 0.5 – 4%; P-monoesters 16 – 38%; and P-diesters 1.2 – 4% [3].
This paper examines the modeling and decision-making issues related to Demand Responsive Transport (DRT) services at strategic, tactical and operational levels, providing an alternative categorization of the main implementation problems, in order to support transit authorities in their effort to understand the methodological steps for assessing potential transport investments of such services.
From a systematic search of the published and gray literature, 35 studies were identified and analyzed to develop a categorization of the operational components of the existing body of research, including the types and sources of evaluations, research methods and designs, research participants, outcome indicators, approaches to analysis, and research limitations.
Reviewers individually classified adverse occurrences using pre-established operational definitions [see Additional file 1] and categorization schemes (Tables 2, 3, and 4) and then discussed them as a group in three one-hour training sessions.
A scenario of synchronous 3D mold assembly demonstrates that geometric categorization of product model provides an operational mechanism for assuring security of information sharing in engineering collaborations over the Internet.
The possible limitations of the study consist of the disease categorization, a possible bias in patient Classification, the metrics for smoking status, and the operational metric for costs, attributable to the information system used.
"Blind Ness" defies easy categorization.
Others resisted categorization.
