道路中线坐标计算程序

采用CASIO fx—4500P科学计算器编程，由道路设计参数和给定桩距计算路线转角、曲线测设元素、主点里程以及以道路中线上主点或任意点作起点的各中桩点(含全部主点)在国家坐标系中的坐标．     

巧用CASIO-4800P计算器放样多个单交点平曲线道路中、边桩

根据施工的实践，用CASIO-4800P计算器编制出一个程序，在采用全站仪任意点坐标法放样时，计算出待求点的坐标。达到放样多个单交点平曲线道路中、边桩的简便计算目的。     

DRAC: Dose Rate and Age Calculator for trapped charge dating

Accurate calculation of the environmental radiation dose rate (Ḋ) is an essential part of trapped charge dating methods, such as luminescence and electron spin resonance dating. Although the calculation of Ḋ is not mathematically complex, the incorporation of multiple variables and the propagation of uncertainties can be challenging. The Dose Rate and Age Calculator (DRAC) is an open access, web-based program which enables rapid Ḋ calculation for trapped charge dating applications. Users can select from recently published attenuation and conversion factors to make mathematically robust, reproducible Ḋ calculations. Comparison of DRAC calculated Ḋ values against the published Ḋ determinations of 422 samples from 32 studies results in a reproducibility ratio of 1.01 ± 0.05. It is anticipated that DRAC will facilitate easier inter-laboratory comparisons and will provide greater transparency for Ḋ calculations. DRAC will be updated to reflect the latest advances in Ḋ calculation and is freely accessible at www.aber.ac.uk/alrl/drac. The code for DRAC is available from github at https://github.com/DRAC-calculator/DRAC-calculator.