Amazon Technologies, Inc.

Other

Jason L Thalken

Matthew Michael Sommer

Brendan Cruz Colon

Adam Edward Powers

Manraj Tatla

Lev Ufimtsev

Aaron Boswell

Brendan Cruz Colón

Kellen K Axten

Devices and techniques are generally described for evaluation of text data using large n-grams. In various examples, a first vector may be generated for first text data, wherein each element of the vector comprises a value indicating whether the first text data includes a respective n-gram included in a corpus of text data. First label data indicating that a user associated with the first text data has connected to a first computer-implemented service more than a threshold number of times during a past time period may be determined. A first machine learning model may be trained based at least in part on the first vector and the first label data. The first machine learning model may be used to determine a first probability associated with a first n-gram of the first vector. In some examples, at least a first user associated with the first n-gram may be determined.

Anomalous source detection in high-dimensional sequence data

Devices and techniques are generally described for fraud detection. In various examples, a first plurality of requests are received over a first time period. In at least some examples, the first plurality of requests may be requests to access a first service. A hierarchical data representation comprising an ordered set of values may be determined for each request of the first plurality of requests. A first subset of the first plurality of requests may be determined. The hierarchical data representation associated with each request of the first subset may include fewer than a threshold number of value substitutions relative to each other hierarchical data representation of the first subset of the first plurality of requests. Access to the first service may be prevented by subsequent requests associated with the first subset of the first plurality of requests.

Detection of adversarial networks

The disclosure provides embodiments for potentially reducing and/or preventing head trauma. Headgear apparatuses comprise a head-protection component configured to be worn over a head and to protect the head from an external force. In certain embodiments, the headgear apparatus has an effective mass of at least 5 kg. In other embodiments, the head-protection component is a form-fitting structure, wherein a maximum distance the head-protection component extends from an exterior surface of the head is less than 5 cm. The head-protection component may be interconnected with a neck support and a body support, wherein the head-protection component, the neck support, and the body support comprise a single structure made of a semi-flexible foam material coated in a latex or vinyl composition.

Headgear for reducing head trauma

Growing community of inventors

Woodland Hills, CA, United States of America

Jason L Thalken