High-Level Context Inference for Human Behavior Identi cation
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High-Level Context Inference for Human Behavior Identi cation
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This work presents the Mining Minds Context Ontology, an ontology for the identi fication of human behavior. This ontology comprehensively models high-level context based on low-level information, including the user activities, locations, and emotions. The Mining Minds Context Ontology is the means to infer high-level context from the low-level information. High-level contexts can be inferred from unclassified contexts by reasoning on the Mining Minds Context Ontology. The Mining Minds Context Ontology is shown to be flexible enough to operate in real life scenarios in which emotion recognition systems may not always be available. Furthermore, it is demonstrated that the activity and the location might not be enough to detect some of the high-level contexts, and that the emotion enables a more accurate high-level context identification. This work paves the path for the future implementation of the high-level context recognition system in the Mining Minds project.
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High-Level Context Inference for Human Behavior Identi cation
- 1. Claudia Villalonga, Oresti Banos, Wahajat Ali, Taqdir Ali, Asif Rassaq, Sungyong Lee, Hector Pomares, Ignacio Rojas International Work-conference on Ambient Assisted Living an Active Ageing (IWAAL 2015), Patagonia, Chile, December 1-4, (2015) High-Level Context Inference for Human Behavior Identification
- 2. /“The Slow-Moving Public Health Disaster” Diseases linked to lifestyle choices are currently the biggest cause of death worldwide: • Cardiovascular conditions, cancers, chronic respiratory disorders, obesity and diabetes, represent more than 60% of global deceases, half of which are of premature nature • Most of these diseases are fairly associated to common risk factors, namely, tobacco and alcohol use, unwholesome diet and physical inactivity • This "lifestyle disease" epidemic causes a much greater public health threat than any other epidemic known to man • Millions of lives could be saved if the world over the next decade invests $1-3 per person on promoting healthier habits Global targets for prevention and control of “lifestyle diseases” to be attained by 2025 Source: WHO, “Global status report on noncommunicable diseases 2014,” World Health Organization, Tech. Rep., 2014. 2
- 3. /Mining Minds in a nutshell “Collection of innovative services, tools, and techniques, working collaboratively to investigate on human's daily-life routines data generated from heterogeneous resources, for personalized wellbeing and healthcare support” 3
- 4. /Context Information Curation Layer High Level Context-Awareness Low Level Context-Awareness Sensory Data Router Inertial Activity Recognizer Activity Unifier Audio Activity Recognizer Video Activity Recognizer Emotion Unifier Location Unifier Context Ontology Manager High-Level Context Reasoner High-Level Context Builder Physiological Emotion Recognizer Video Emotion Recognizer Audio Emotion Recognizer Inertial Location Detector Video Location Detector Geopositioning Location Detector Context Ontology Storage High-Level Context Notifier Classification Feature Extraction Segmentation Preprocessing Input Adapter Output Adapter Classification Feature Extraction Segmentation Preprocessing Input Adapter Output Adapter Classification Feature Extraction Segmentation Preprocessing Input Adapter Output Adapter Classification Feature Extraction Segmentation Preprocessing Input Adapter Output Adapter Classification Feature Extraction Segmentation Preprocessing Input Adapter Output Adapter Classification Feature Extraction Segmentation Preprocessing Input Adapter Output Adapter InertialNavigation Tracking Feature Extraction Segmentation Preprocessing Input Adapter Output Adapter Video Tracking Feature Extraction Segmentation Preprocessing Input Adapter Output Adapter GPS Tracking Feature Extraction Segmentation Preprocessing Input Adapter Output Adapter Activity Notifier Emotion Notifier Location Notifier Context Synchronizer Context Instantiator Context Mapper Context Verifier Context Classifier Context Query Generator Context Handler Ontology Model Manager High Level Context Low Level Context Multimodal Data 4
- 5. /Mining Minds Context Ontology 5 ContextOntologyMetrics: 9High-LevelContexts 16Activities(Low-LevelContext) 8Locations(Low-LevelContext) 8Emotions(Low-LevelContext)
- 6. /Context Ontology: High-Level Context Classes Definition 6 Activity and Location (Emotion is not required) Activity, Location and Emotion (if available) Activity, Location and Emotion (mandatory) None of the other Contexts and sedentary Activity
- 7. /Context Ontology: Examples of High-Level Context Instances 7 Activity, Location and Emotion Activity, Location and Emotion Activity and Location, without Emotion Activity and Location, without Emotion
- 8. /Context Ontology: Examples of High-Level Context Instances 8 Activity, Location and Emotion Activity and Location, without Emotion
- 9. / HighLevelContext-Awareness HLCA Operation 9 LLCA Activity Recognizer Emotion RecognizerLocation Detector High-Level Context Builder High-Level Context Reasoner High-Level Context Notifier Context Ontology Manager Context Ontology Storage Ontology Model Manager Context Query Generator Context Handler Data Curation Layer act_sitting rdf:type Sitting . act_sitting hasStartTime “2015-08-10T11:05:30”^^dateTime . act_sitting isContextOf user9876 . loc_office rdf:type Office . loc_office hasStartTime “2015-08-10T11:04:55”^^dateTime . loc_office isContextOf user9876 . ctx rdf:type Context . ctx hasActivity act_sitting . ctx hasLocation loc_office . ctx hasEmotion emo_boredom . ctx isContextOf user9876 . ctx hasStartTime “2015-08-10T11:05:30”^^dateTime . ctx rdf:type hasActivity only ({act_sitting}) . ctx rdf:type hasLocation only ({loc_office }) . ctx rdf:type hasEmotion only ({emo_boredom}) . ctx rdf:type Context . ctx rdf:type OfficeWork . ctx hasActivity act_sitting . ctx hasLocation loc_office . ctx hasEmotion emo_boredom . ctx isContextOf user9876 . ctx hasStartTime “2015-08-10T11:05:30”^^dateTime . ctx rdf:type hasActivity only ({act_sitting}) . ctx rdf:type hasLocation only ({loc_office }) . ctx rdf:type hasEmotion only ({emo_boredom}) . emo_boredom type Boredom . emo_boredom hasStartTime “2015-08-10T11:05:12”^^dateTime . emo_boredom isContextOf user9876 .
- 10. /HLCA Operation 10 11:05:30 11:08:0011:06:45 11:05:50 11:07:00 User9876 llc_1777 Sitting llc_1780 Walking llc_1778 Office llc_1779 Boredom llc_2501 Sitting llc_2500 Mall User5555 llc_2502 Happiness Context Ontology Manager Context Ontology Storage Ontology Model Manager Context Query Generator Context Handler Context Mapper
- 11. /HLCA Operation 11 11:05:30 11:08:0011:06:45 11:05:50 11:07:00 User9876 llc_1777 Sitting llc_1780 Walking llc_1778 Office llc_1779 Boredom llc_2501 Sitting llc_2500 Mall User5555 llc_2502 Happiness Context Synchronizer • LLC instances starting within the window: llc_1777 • LLC instances ending within the window: - • Order chronologically • Concurrent LLC for llc_1777: llc_1778 and llc_1779 Notify Context Instantiator 1 2 3 4 5 11:05:15 11:05:30
- 12. /HLCA Operation 12 11:05:30 User9876 llc_1777 Sitting llc_1778 Office llc_1779 Boredom hlc_0001 Trigger LLC Concurrent LLC Unclassified HLC 11:05:30 User9876 O I INPUT: OUTPUT: Context Instantiator
- 13. /HLCA Operation 13 HLC Reasoner: 11:05:30 11:08:0011:06:45 11:05:50 11:07:00 User9876 llc_1777 Sitting llc_1780 Walking llc_1778 Office llc_1779 Boredom llc_2501 Sitting llc_2500 Mall User5555 llc_2502 Happiness hlc_0002 OfficeWork hlc_0001 OfficeWork hlc_0101 Inactivity hlc_0003 Unknown hlc_0102 Amusement
- 14. /HLCA Operation 14 HLC Notifier: 11:05:30 11:08:0011:06:45 11:05:50 11:07:00 User9876 llc_1777 Sitting llc_1780 Walking llc_1778 Office llc_1779 Boredom llc_2501 Sitting llc_2500 Mall User5555 llc_2502 Happiness hlc_0002 OfficeWork hlc_0001 OfficeWork hlc_0001 OfficeWork hlc_0101 Inactivity hlc_0101 Inactivity hlc_0003 Unknown hlc_0102 Amusement hlc_0002 OfficeWork Context Ontology Manager Context Ontology Storage Ontology Model Manager Context Query Generator Context Handler
- 15. /Demo 15
- 16. /Conclusions • Design and implementation of a framework for the online identification of high-level context based on low-level information (activities, locations, and emotions) • Definition of an ontology for the comprehensive and holistic identification of human behavior: • activity and location information might not be enough to detect some of the high- level contexts • emotion enables a more accurate high-level context identification • Flexible methodology and ontology to operate in real life scenarios in which recognition systems may not always be available 16
- 17. Thank you for your attention. Questions? Claudia Villalonga Ubiquitous Computing Lab (UCLab) Kyung Hee University (KHU), South Korea Email: cvillalonga@oslab.khu.ac.kr /
Editor's Notes
- 1
- 'Lifestyle' diseases linked to unhealthy habits kill millions of people prematurely
- Context ::: class Sitting ::: subclass (these are disjoint) hasActivity ::: object property hasStartTime ::: data property Literal (string), and concretely the time has the W3C standard format XML schema
- These are our defined classes (only defined classes can be used for the classification). HLC classes are “defined” (i.e., both necessary, “e.g., hasUser some User”, and sufficient conditions, “e.g., hasActivity some Sitting”) while LLC classes are simply “described” (i.e., only necessary conditions, “e.g., hasUser some User”). Due to the “open world assumption”: you cannot assume that something does not exist if you do not explicitly state that it does not exist Some – existencial restriction ::: it must exist Only – universal restriction ::: if it exists, it can only be of the given type (e.g., the property (“hasActivity”) can only relate to an instance which is a member of class “Sitting” and not at the same link to another instance of type “Walking”)
- Once we have defined our ontology, how can we use it? The idea is to create an instance of this context whenever a new context is experienced by the user. What we do is to set in this instance the low-level contexts that are taking place. In this case for example the emotions… By applying reasoning techniques we can identify the high-level context, in this case Amusement. Instance of the “Context” class, i.e., parent class. (Left) Type assertions | (Right) Property assertions Assertion of the values of the properties. E.g., hasActivity act_sitting (where act_sitting is an instance of the LLC class Sitting) Due to the Open World Assumption, type assertions are used as closure axioms to indicate something does not exist. E.g., the value of the “hasActivity” property is ONLY Sitting. Or the emotion does not exist (not (hasEmotion some Emotion))