A cohesive framework for the spectral and spatial analysis of 
    colour described in Maia, Eliason, Bitton, Doucet & Shawkey (2013) 
    <doi:10.1111/2041-210X.12069> and Maia, Gruson, Endler & White (2019)
    <doi:10.1111/2041-210X.13174>.

Functions to process, format and store ActiGraph GT1M and GT3X accelerometer data.

Interface to Amazon Web Services <https://aws.amazon.com>,
    including storage, database, and compute services, such as 'Simple
    Storage Service' ('S3'), 'DynamoDB' 'NoSQL' database, and 'Lambda'
    functions-as-a-service.

Interface to 'Amazon Web Services' 'analytics' services,
    including 'Elastic MapReduce' 'Hadoop' and 'Spark' big data service,
    'Elasticsearch' search engine, and more <https://aws.amazon.com/>.

Interface to 'Amazon Web Services' application integration
    services, including 'Simple Queue Service' ('SQS') message queue,
    'Simple Notification Service' ('SNS') publish/subscribe messaging, and
    more <https://aws.amazon.com/>.

Functions for making low-level API requests to Amazon Web Services
    <https://aws.amazon.com>. The functions handle building, signing, and
    sending requests, and receiving responses. They are designed to help build 
    higher-level interfaces to individual services, such as Simple Storage
    Service (S3).

Interface to 'Amazon Web Services' compute services,
    including 'Elastic Compute Cloud' ('EC2'), 'Lambda'
    functions-as-a-service, containers, batch processing, and more
    <https://aws.amazon.com/>.

Interface to 'Amazon Web Services' cost management services,
    including cost and usage reports, budgets, pricing, and more
    <https://aws.amazon.com/>.

Interface to 'Amazon Web Services' customer engagement
    services, including 'Simple Email Service', 'Connect' contact center
    service, and more <https://aws.amazon.com/>.

Interface to 'Amazon Web Services' database services,
    including 'Relational Database Service' ('RDS'), 'DynamoDB' 'NoSQL'
    database, and more <https://aws.amazon.com/>.