Most desktop 3D printers lack features that allow manual calibration of printer parameters. It is crucial to assess the accuracy of printing to minimize the margin of error and variance between each print. Therefore, this study aimed to develop a method for monitoring the calibration of in-office 3D printers. A calibration coupon was designed to have a tolerance and dimensions that define nominal geometry and allow the measurement of variances occurring in X–Y axes and curvature. Ten printing cycles were run on two stereolithography (SLA) 3D printers with two different resins. Additionally, the coupons were positioned in five positions on the build platform to assess errors caused by differences in positioning. Measurements were made on the X and Y axes. No statistical difference was noted between the coupons being printed in different positions on the build platform and between the two resins at both X and Y axes of measurement (p > 0.05). Desktop 3D printers currently lack a standardized calibration protocol, which provides a closed loop for design and manufacturing of printed parts. The coupon in this study will allow monitoring the calibration of desktop 3D printers to ensure high-quality printing.
Child sexual abuse is a preventable public health problem that is addressed primarily via reactive criminal justice efforts. In this report, we focus on the cost of incarcerating adults convicted of sex crimes against children in the United States. Specifically, we summarize publicly available information on U.S. state and federal prison and sex offender civil commitment costs. Wherever possible, we used government data sources to inform cost estimates. Results indicate the annual cost to incarcerate adults convicted of sex crimes against children in the United States approaches $5.4 billion. This estimate does not include any costs incurred prior to incarceration (e.g., related to detection and prosecution) or post-release (e.g., related to supervision or registration). Nor does this estimate capture administrative and judicial costs associated with appeals, or administrative costs that cannot be extricated from other budgets, as is the case when costs per-prisoner are shared between prisons and civil commitment facilities. We believe information on the substantial funding dedicated to incarceration will be useful to U.S. federal, state, and local lawmakers and to international policymakers as they consider allocating resources to the development, evaluation and dissemination of effective prevention strategies aimed at keeping children safe from sexual abuse in the first place.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.