This paper details the development of the first cross-platform programmer’s calculator. As users of programmer’s calculators, we wanted to address limitations of existing, platform-specific options in order to make a new, better calculator for us and others. And rather than develop for only oneplatform, we wanted to make an application that could run on multiple ones, maximizing its reach and u...

Developing a generalized useful DNA computer has been one of the main interests since the inception of molecular computation. Toward that goal it is important to equip DNA with the ability to perform mathematical calculations. Here, a simple procedure that allows DNA-based bit arithmetic calculations is presented. Oligonucleotides encoding input bit numbers serve as primers for PCR to carry out...

The Texas Instruments Calculator Based Laboratory used with graphics calculators, enables students to undertake mathematical modelling through problem solving using classroom generated data. The easy transfer of data to each student's calculator allows self–paced, independent work either individually or in small groups. There are opportunities for discussion between students and teacher and bet...

The voice activated calculator is a speaker-independent system that is used to perform basic mathematical operations. It recognizes the isolated spoken digits from 0 to 9, and other words like plus, minus, times, equal and clear. It then performs the respective arithmetic operations, and displays the final answer on an LCD display.

As graphics calculators are mainly devices for student learning, it is important that curricula and examinations are constructed to incorporate them in a coherent way. Three recent developments in graphics calculators are described and analysed to determine their implications for examinations. Symbolic manipulation on algebraic calculators challenges existing emphases in many examinations and t...

The rational eigenvalue problem is an emerging class of nonlinear eigenvalue problems arising from a variety of physical applications. In this paper, we propose a linearization-based method to solve the rational eigenvalue problem. The proposed method converts the rational eigenvalue problem into a well-studied linear eigenvalue problem, and meanwhile, exploits and preserves the structure and p...

The views presented in this paper are those of the author alone, and they do not necessarily reflect the views of the Board of Governors of the Federal Reserve System or its official staff. The author wishes to thank Rochelle Antoniewicz for sharing the flow of funds calculations used in this paper, Amber Lynn Lytle for research assistance, Annamaria Lusardi, Martha Starr-McCluer and John Weich...

Given a large number of incorrect responses to mathematical exercises, we ask, “What errors might the learner have made to arrive at their answer?” Even though our data does not contain intermediate steps, we find that we are able to infer well over 50% and sometimes over 90% of the types of errors learners make on an exercise when they only supply final answers. Our approach capitalizes on the...

OBJECTIVES To evaluate English, Afrikaans, and Xhosa mother-retained 'Road-to-Health Book' (RTH book) for children, and an electronic calculator. DESIGN Researchers D Harrison (DH) and H Harker (HH) informed clinic staff about the contents and significance of the RTH book. They requested nurses to use this book in conjunction with the Road-to-Health Card and to issue and explain its use to ev...

The risk calculator of the American College of Surgeons National Surgical Quality Improvement Program (ACS-NSQIP) has been shown to be useful in predicting postoperative complications. In this study, we aimed to evaluate the predictive value of the ACS-NSQIP calculator in geriatric patients undergoing lumbar surgery.A total of 242 geriatric patients who underwent lumbar surgery between January ...