1,027 research outputs found
A high-input impedance differential millivolt meter for use with solid ceramic oxygen electrolyte cells
Design factors are given for a high-input impedance differential millivolt meter designed, built, and tested as an inexpensive solid-state electronic system for use in measuring the electromotive force from solid ceramic oxygen electrolyte cells. A schematic diagram is included
Human dimension of elections: how poll workers shape public confidence in elections
Working PaperThe role of voting technologies has received considerable attention since the 2000 election. However, the voter experience at the polling place and especially the voter-poll worker interaction is also of critical importance. Rarely are poll workers considered an arm of the government, even though they clearly operate as extensions of governmental actors as street-level bureaucrats. Poll workers exercise discretion in ways that directly affect the voting experience. We examine the relationship between voters ¢ perceptions of the poll worker job performance and confidence that the election process produces fair outcomes and that ballots were counted accurately. In an ordered logit model, perceptions of poll workers is a significant predictor of both variables related to voter confidence in the presence of numerous controls suggesting that overlooking the recruitment and training of competent poll worker can have a detrimental effect on voter confidence
Combination of herbivore removal and nitrogen deposition increases upland carbon storage
© 2015 The Authors. Global Change Biology Published by John Wiley & Sons Ltd. Acknowledgements We thank Ruth Mitchell, Alison Hester, Bob Mardon, Eoghain Maclean, David Welch, National Trust for Scotland, Scottish Natural Heritage and the Woodland Trust for helping find appropriate exclosures and granting access permission. We thank Nick Littlewood and Antonio Lopez Nogueira for their assistance in the field and processing samples in the lab and Ron Smith and Tony Dore for providing N deposition data. SWS was funded by a BBSRC studentship.Non peer reviewedPublisher PD
Scater: pre-processing, quality control, normalization and visualization of single-cell RNA-seq data in R.
MOTIVATION: Single-cell RNA sequencing (scRNA-seq) is increasingly used to study gene expression at the level of individual cells. However, preparing raw sequence data for further analysis is not a straightforward process. Biases, artifacts and other sources of unwanted variation are present in the data, requiring substantial time and effort to be spent on pre-processing, quality control (QC) and normalization. RESULTS: We have developed the R/Bioconductor package scater to facilitate rigorous pre-processing, quality control, normalization and visualization of scRNA-seq data. The package provides a convenient, flexible workflow to process raw sequencing reads into a high-quality expression dataset ready for downstream analysis. scater provides a rich suite of plotting tools for single-cell data and a flexible data structure that is compatible with existing tools and can be used as infrastructure for future software development. AVAILABILITY AND IMPLEMENTATION: The open-source code, along with installation instructions, vignettes and case studies, is available through Bioconductor at http://bioconductor.org/packages/scater . CONTACT: [email protected]. SUPPLEMENTARY INFORMATION: Supplementary data are available at Bioinformatics online
Spin-polarized electron beam generation in the colliding-pulse injection scheme
Employing colliding-pulse injection has been shown to enable high-quality
electron beams to be generated from laser-plasma accelerators. Here by
leveraging test particle simulations, Hamiltonian analysis, and
multidimensional particle-in-cell (PIC) simulations, we lay the theoretical
framework of spin-polarized electron beam generation in the colliding-pulse
injection scheme. Furthermore, we show that this scheme enables the production
of quasi-monoenergetic electron beams in excess of 80\% polarization and tens
pC charge with commercial 10-TW-class laser systems.Comment: 11 pages, 10 figure
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