Table 2 Ontology definitions and detailed description of the activity labels found in the dataset.

From: A multi-sensor dataset with annotated activities of daily living recorded in a residential setting

Label

Ontology Definition

Description

Ambulation

a_ascend

ascending stairs

Ascending stairs

a_descend

descending stairs

Descending stairs

a_jump

jumping

A standing vertical jump

a_walk

walking

Walking without objects in one’s hands

a_loadwalk

Walking with load

walking whilst holding objects (e.g. a bowl).

Posture

p_bent

bend over

Static stand with the torso bent forward at any angle.

p_kneel

kneeling

Crouching with knees bent, resting on the knees.

p_lie

lying

Lying down in any position (e.g. supine, prone)

p_sit

sitting on chair/bed/sofa

Any seated posture other than those defined elsewhere.

p_squat

squating

Crouching with knees bent and balancing on the feet

p_stand

standing

Any standing posture.

Transition

t_bend

bending

Bending the torso forward, defined to include partial rotation.

t_straighten

straightening

Straightening the torso.

t_turn

turning/pivoting

A turn or pivot of the torso, defined to include partial rotation.

t_stand_kneel

stand to kneel

Transition from a standing position to a kneeling position.

t_kneel_stand

kneel to stand

Transition from a kneeling position to a standing position.

t_lie_sit

lying to sit

Transition from lying down (typically in a supine position) to a standing position

t_sit_lie

sit to lying

Transition from a seated position to lying down.

t_sit_stand

sit to stand

Transition from a seated position to a standing position.

t_stand_sit

stand to sit

Transition from a standing position to a seated position.