Over recent years, spreadsheets have been increasingly recognised as having a role in teaching and learning mathematics, but have continued to suffer the limitation of requiring access to computers. This paper summarises some of the potential benefits of spreadsheet use and briefly assesses some of the available research about it in schools. A spreadsheet application for a calculator is describ...

This paper presents a new MATLAB interface calculator based on the transmission line theory approach to design a parallel coupled microstrip band pass filters (PCMBPF). All formulas of the PCMBPF are programmed using the closed-form mathematic expressions and the coupling matrix concept. The proposed new interface calculator allows scientist and engineers to obtain the whole parameters required...

The development of an estimator for vapor pressure based upon organic functional groups is described. This vapor pressure calculator permits prediction of vapor pressure for a wide range of structural classes. The statistical quality of the derived coefficients is presented as well as the quality of the prediction of the training set of compounds. The calculator is then used to predict the vapo...

The study of information as proposed in information theory provides a useful tool for studying many aspects of information systems, libraries, and archives. How does a calculator that computes information-theoretic functions contribute to students learning database ideas such as the relationships between various attributes, or columns in a relational database? Understanding the relationships be...

introduction bolus is a soft and resilient material which is used for increasing skin dose or to even out the irregular patient contour. the main property of various materials used presently as bolus is the water-equivalent electron density. ethyl methacrylate is used as a soft-liner in dentistry and its physical and chemical properties are proved to be nontoxic for human body. the goal of this...

In this paper a geometric calculator is presented. A language of geometrical expressions, that are evaluated by the calculator, and the design and implementation of its interpreter is also presented. Geometrical expressions correspond to abstract data-types that can be defined dynamically through composition operations. Diagrams can be represented by a set of geometrical expressions, and the ge...

Published data on the effects of ruminal bolus on the number of ovulatory follicles in ewes does not exist. The present study determined the effects of a ruminal bolus on trace element status, follicular dynamics and reproductive performance in ewes. Eighty Afshari cycling ewes were synchronized during breeding season using CIDR for 14 days and assigned to 4 groups (n=20); group 1 received a si...

Purpose To compare two calculators for toric intraocular lens (IOL) calculation and to evaluate the prediction of refractive outcome. Methods Sixty-four eyes of forty-five patients underwent cataract surgery followed by implantation of a toric intraocular lens (Zeiss Torbi 709 M) calculated by a standard industry calculator using front keratometry values. Prediction error, median absolute err...