Abstract: The present disclosure provides systems and methods relating to administration, evaluation, and review of assessments, such as quizzes and tests. According to various embodiments, a first challenge problem of an assessment may be displayed to an assessor, such as an instructor of students. The first challenge problem may include one or more answers provided by an assessee, such as a student. For example, an assessee may have answered the challenge problem by providing one or more digital ink stroke answers, a draggable object answer, and/or an annotation answer. The systems and methods described herein facilitate the automatic and/or semi-automatic evaluation of the assessee answer items.

Abstract: A method for detecting failure in a noise cancellation system is provided. The noise cancellation system is operable to at least partially cancel an unwanted noise produced by a noise source. The method includes receiving a cancellation noise signal from the noise cancellation system. The cancellation noise signal represents a cancellation noise that, when combined with a target noise, is operable to at least partially cancel the target noise. The method also includes receiving an error signal approximately representing a portion of the target noise that remains after the cancellation noise and the target noise are combined. The method also includes determining whether the signal level changed or remains unchanged for each of the received cancellation noise signal and the error signal. The method also includes assigning a failure state of the noise cancellation system based on the determination and initiating a remedial measure that corresponds with the assigned failure state.