Results 251 to 260 of about 949,288 (275)

Predation, competition and environmental variables: Some mathematical models

Journal of Theoretical Biology, 1970
Abstract Mathematical models adapted to computer programming were prepared to simulate various ecological interactions. The models were tested on an Alwac III-E computer, using various hypothetical population parameters. Single-species populations in a constant environment became stabilized in number of individuals and age-composition.
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Intellective variables and mathematics achievement: Directions for research

Journal of School Psychology, 1970
Abstract Research concerned with the analysis and correlates of mathematical abilities, conducted primarily during the past decade, is reviewed. It is concluded that certain specific abilities, in addition to general intelligence, affect performance in mathematics.
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On Problems in Mathematical Physics with Variable Parameter

Journal of Mathematical Sciences, 2017
Summary: We consider evolution equations with variable parameters. We obtain new representations of solutions and indicate their applications to inverse problems in mathematical physics.
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Mathematical modeling of variables involved in dissolution testing

Journal of Pharmaceutical Sciences, 2011
Dissolution testing is an important technique used for development and quality control of solid oral dosage forms of pharmaceutical products. However, the variability associated with this technique, especially with USP apparatuses 1 and 2, is a concern for both the US Food and Drug Administration and pharmaceutical companies.
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Stability-constrained variable mathematical model for odd-order recursive variable filters

2017 14th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON), 2017
This paper presents a stability-triangle-constrained mathematical model (transfer function) for modeling the odd-order stable recursive variable digital filter (recursive variable filter). In variable-filter (VF) designs, a few spectral parameters are usually used for tuning the frequency-domain characteristics, and the VF coefficients are expressed as
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A Mathematical Type for Physical Variables

2008
In identifying the requirements of a markup language for describing the mathematical semantics of physics-based models, we pose the question: "Is there a mathematical type for physical variables?" While this question has no a priori answer, since physics is fundamentally empirical, it appears that a large body of physics may be described with a single ...
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Exploring the Discursive Variability of Mathematics Coaches

Journal of Teacher Education
Research on how coaches talk with teachers during coaching cycles is underdeveloped. We analyzed 1,649 discourse moves from 24 mathematics content-focused coaching cycles to determine the extent to which coaches’ discursive tendencies vary. We explored variation between coaches, between planning and debriefing conversations, and between cycles for the
Ryan Gillespie, Julie Amador, Jeffrey Choppin   +2 more
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Names and evaluation 1: mathematical variables

1999
Maple uses numbers, mathematical variables, algebraic expressions, mathematical functions, matrices, and many other types of objects. This chapter discusses the mechanisms in Maple for handling names that refer to these objects.
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Variability and Functionality in High School Mathematics

The Mathematics Teacher, 1929
The subject of variation as a topic or possibly phase of mathematics is a very important one in the field of the secondary school. In this day, when so much is made of correlations within the general field of mathematics and with other allied fields of science, the study of variation brings out numerous interesting contacts and inter-relations for the ...
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Inequalities and mathematical properties of uncertain variables

Fuzzy Optimization and Decision Making, 2011
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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