UCLA Dataverse
Not a member yet
377 research outputs found
Sort by
Rapid Analytical Instrumentation for Electrochemical Impedance Spectroscopy Measurements
No full textThis work reports a low-cost custom electrochemical instrument capable of performing rapid and accurate electrochemical impedance spectroscopy (EIS) for supercapacitors over a broad frequency band (10 mHz to 2 kHz). Conventionally, EIS is measured via sinusoidal perturbations; however, such an approach suffers from lengthy measurement time. Chirp signals have been shown previously to reduce EIS measurement time for supercapacitors for relative narrow frequency bands (1 Hz to 2 kHz). However, to characterize supercapacitors comprehensively, much broader frequency bands are required. Here, we present a custom instrument with an adaptive measurement algorithm for performing EIS measurements in a wide frequency range of 10 mHz to 2 kHz with low measurement uncertainties. The results obtained using this new technique has been validated here with a commercial instrument on several types of supercapacitors. Furthermore, measurement time on average decreases from 1500 s to less than 400 s. The overall cost of the custom instrument is 90% lower as compared to the commercial instrument. The custom instrument’s accuracy, time efficiency and low cost are expected to benefit electrochemical researchers
Intro to R Workshop: Collaboratory
No full textThese are the course materials for the Intro to R workshop taught by Ibraheem for the Collaboratory Workshop series as part of Applied Bioinformatics M275A and Molecular, Cellular and Developmental Biology MCDB199
UCLA Registrar Enrollment Data, Winter 1999 - Spring 2020
No full textEnrollment data scraped from the UCLA Registrar's publicly available Schedule of Classes.
Details about the data and scraper are linked below:
Exploring Enrollment: Methodology
Scraping Enrollment Data From the UCLA Registrar, Part One
Scraping Enrollment Data From the UCLA Registrar, Part Two
</ul
Karakax Valley Site 4 - Cosmogenic dating results
No full textThe file CRN_TableSI_Peltzeretal2020.xlsx is an Excel spreadsheet with the parameters needed to calculate the model ages using the CRONUS online calculator version 3 (https://hess.ess.washington.edu/).
The file CRN_Table2_Peltzeretal2020.xlsx is an Excel spreadsheet with the CRN age determination results published in related publication Table 2
Karakax Valley Site 1 - OSL dating results
No full textOSL dating results for Site 1 described in the related publication. Excel file contains the dosimetry data in a conventional format with full details of the inputs required for a DRAC dose rate calculation. The calculation process can be found in the related publication and the DRAC website (www.aber.ac.uk/alrl/drac)
Introduction to QGIS
No full textQuantum Geographic Information Systems (QGIS) is a user friendly open source GIS software. This workshop will introduce the interface and exhibit a small portion of spatial analysis techniques QGIS offers to familiarize you with some of the basis, and to illustrate the fundamentals of GIS. The workshop is targeted for beginners.The attendees will have a hands-on practice to apply the spatial analysis tools and create a map as as a final output
Replication Data for: An automated pipeline for the discovery of conspiracy and conspiracy theory narrative frameworks
No full textData for the paper, "An automated pipeline for the discovery of conspiracy and conspiracy theory narrative frameworks: Bridgegate, Pizzagate and storytelling on the web."
The data consists of comments and posts to discussion forums related to the Pizzagate conspiracy theory, and to news articles related to the Bridgegate conspiracy.
Data was cleaned for spam, photographs, extraneous records, and filtered to remove junk characters and other unrelated to topic.
Metadata was retained for external verification purposes only.
Please see accompanying article for preprocessing and data analysis methodologies.
All of our data are from publicly available sources, and conform to the Terms of Services of their source sites
Association of work-family experience with mid- and late-life memory decline in US women - Supplementary File
No full textSupplementary file for manuscript "Association of work-family experience with mid- and late-life memory decline in US women
Isotopologue_data_reduction_Green_Bank
No full textData reduction and analysis code for SiO isotopologue ratios using the Green Bank Telescope. Software written by Dr. Nate Monson