Cross-sectional echocardiography was used to quantify left ventricular mass noninvasively in 21 dogs. Short- and long-axis cross-sectional images of the left ventricle were reproducibly traced at endocardial and epicardial borders during stop-motion video-tape replay. We used area, length and diameter measurements to calculate left ventricular mass by seven mathematic models, including the stan...

To predict and improve human performance in spatial segmentation Chinese handwriting recognizer, a mathematic performance model was developed based on Fitts’ law and probability theory of discrete random variables. The model was verified by a behavioral experiment and it can predict subjects’ task completion time well after the subjects experienced 2 stages of practice (R square > 0.9). The mat...

Interval arithmetic is a tool of choice for numerical software verification, as every result computed using this arithmetic is self-verified: every result is an interval that is guaranteed to contain the exact numerical values, regardless of uncertainty or roundoff errors. From 2008 to 2015, interval arithmetic underwent a standardization effort, resulting in the IEEE 1788-2015 standard. The ma...

Using the mathematic techniques such as Fuzzy approach has useful outcomes for production planning in different sources. In this paper LGP1 was used to model the objectives such as: avoidance of shortage or surplus of demand, access to maximum of income, using the normal capacity of production and organizing the inventory of warehouse, within the framework of Goal constraints like balancing b...

Abstract: The objective of this research was to find out students’ learning activity on Linear Equation System Two Variables subject using Geogebra media, if there an increase in the mathematic communication skills and describe media. This conducted at SMP Negeri 1 Ngusikan. Based data school, still low, so use media expected skills. applying qualitative research. were collected by tests interv...

Exact mathematic models were developed for traveling wave antennas with a constant slot width based on the dyadic Green function, taking into account both main and cross-polarization components of field in far radiation zone. The possibility using these as basic studying electrodynamic properties different configuration (linearly, exponentially tapering, etc.) is justified. influence geometric ...

a confounder is a variable whose presence affects the variables being studied so that the results do not reflect the actual relationship. there are various ways to exclude or control confounding variables including randomization, restriction and matching. but all these methods are applicable at the time of study design. when experimental designs are premature, impractical, or impossible, resear...