Monitoring Sleep with WISP Tags

2013 ◽  
pp. 173-192 ◽  
Author(s):  
Enamul Hoque ◽  
Robert F. Dickerson ◽  
John A. Stankovic
Keyword(s):  
Empirical Study ◽  
Monitoring System ◽  
Preliminary Data ◽  
Body Position ◽  
Sleep Stages ◽  
Accelerometer Data ◽  
Controlled Experiments ◽  
Sleep Monitoring ◽  
Fine Grained ◽  
Inference Algorithms

This chapter presents a sleep monitoring system based on WISP tags. The authors show that their system accurately infers fine-grained body positions from accelerometer data collected from the WISP tags attached to the sides of a bed. Movements, duration, and bed entrances and exits are also detected by the system. The chapter presents the results of an empirical study from 10 subjects on three different mattresses in controlled experiments to show the accuracy of the inference algorithms. The authors also evaluate the accuracy of the movement detection and body position inference for six nights on one subject, and compare these results with two baseline systems. Preliminary data investigating the correlation between sleep stages from the Zeo and movement is also presented.

scholarly journals The Linguistic Formulation of Fallacies Matters: The Case of Causal Connectives

Argumentation ◽  
2020 ◽  
Author(s):  
Jennifer Schumann ◽  
Sandrine Zufferey ◽  
Steve Oswald
Keyword(s):  
Empirical Study ◽  
Coarse Grained ◽  
Controlled Experiments ◽  
Corpus Study ◽  
Fine Grained ◽  
Discourse Connectives

Abstract While the role of discourse connectives has long been acknowledged in argumentative frameworks, these approaches often take a coarse-grained approach to connectives, treating them as a unified group having similar effects on argumentation. Based on an empirical study of the straw man fallacy, we argue that a more fine-grained approach is needed to explain the role of each connective and illustrate their specificities. We first present an original corpus study detailing the main features of four causal connectives in French that speakers routinely use to attribute meaning to another speaker (puisque, étant donné que, vu que and comme), which is a key element of straw man fallacies. We then assess the influence of each of these connectives in a series of controlled experiments. Our results indicate each connective has different effects for the persuasiveness of straw man fallacies, and that these effects can be explained by differences in their semantic profile, as evidenced in our corpus study. Taken together, our results demonstrate that connectives are important for argumentation but should be analyzed individually, and that the study of fallacies should include a fine-grained analysis of the linguistic elements typically used in their formulation.

The Effect of Sensor Placement and Number on Physical Activity Recognition and Energy Expenditure Estimation (Preprint)

2020 ◽  
Author(s):  
Anis Davoudi ◽  
Mamoun T. Mardini ◽  
Dave Nelson ◽  
Fahd Albinali ◽  
Sanjay Ranka ◽  
...  
Keyword(s):  
Physical Activity ◽  
Older Adults ◽  
Energy Expenditure ◽  
Activity Recognition ◽  
Recognition Accuracy ◽  
Body Position ◽  
Computer Work ◽  
Accelerometer Data ◽  
Upper Arm ◽  
Lifestyle Activities

BACKGROUND Research shows the feasibility of human activity recognition using Wearable accelerometer devices. Different studies have used varying number and placement for data collection using the sensors. OBJECTIVE To compare accuracy performance between multiple and variable placement of accelerometer devices in categorizing the type of physical activity and corresponding energy expenditure in older adults. METHODS Participants (n=93, 72.2±7.1 yrs) completed a total of 32 activities of daily life in a laboratory setting. Activities were classified as sedentary vs. non-sedentary, locomotion vs. non-locomotion, and lifestyle vs. non-lifestyle activities (e.g. leisure walk vs. computer work). A portable metabolic unit was worn during each activity to measure metabolic equivalents (METs). Accelerometers were placed on five different body positions: wrist, hip, ankle, upper arm, and thigh. Accelerometer data from each body position and combinations of positions were used in developing Random Forest models to assess activity category recognition accuracy and MET estimation. RESULTS Model performance for both MET estimation and activity category recognition strengthened with additional accelerometer devices. However, a single accelerometer on the ankle, upper arm, hip, thigh, or wrist had only a 0.03 to 0.09 MET increase in prediction error as compared to wearing all five devices. Balanced accuracy showed similar trends with slight decreases in balanced accuracy for detection of locomotion (0-0.01 METs), sedentary (0.13-0.05 METs) and lifestyle activities (0.08-0.04 METs) compared to all five placements. The accuracy of recognizing activity categories increased with additional placements (0.15-0.29). Notably, the hip was the best single body position for MET estimation and activity category recognition. CONCLUSIONS Additional accelerometer devices only slightly enhance activity recognition accuracy and MET estimation in older adults. However, given the extra burden of wearing additional devices, single accelerometers with appropriate placement appear to be sufficient for estimating energy expenditure and activity category recognition in older adults.

scholarly journals Noncontact Sleep Monitoring System under a Mattress

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Xu Jiao ◽  
Xiaosha Wang ◽  
Xiaohang Wang ◽  
Zipeng Liu
Keyword(s):  
Monitoring System ◽  
Sleep Monitoring

Findings from an empirical study of fine-grained human social contacts

2009 ◽  
Author(s):  
Yi Wang ◽  
Bhaskar Krishnamachari ◽  
Thomas W. Valente
Keyword(s):  
Empirical Study ◽  
Social Contacts ◽  
Fine Grained

‘For Better or Worse?’: Heterosexuality Reinvented

2002 ◽  
Vol 7 (2) ◽  
pp. 68-79 ◽  
Author(s):  
Jenny Hockey ◽  
Victoria Robinson ◽  
Angela Meah
Keyword(s):  
Focus Group ◽  
Empirical Study ◽  
Theoretical Approach ◽  
Preliminary Data ◽  
Lived Experiences ◽  
Heterosexual Relationships ◽  
Focus Group Discussions ◽  
Group Discussions ◽  
The Uk ◽  
People’S Perceptions

Based upon a series of focus group discussions carried out in East Yorkshire, this article contributes to debates on both the nature and theorising of heterosexual relationships that have recently been investigated from diverse perspectives. These group discussions represent the launch of the first major empirical study of heterosexuality and ageing that has been undertaken in the UK. In drawing upon preliminary data from these focus groups, our findings reinforce and add to the challenging of a representation of heterosexuality which is both monolithic and inflexible, by exploring accounts of peoples’ actual lived experiences. Through this research we begin to generate a theoretical approach which highlights the complexity of these lived realities. We particularly explore the intersections of gender, age, class and family location. In doing so, we pinpoint differences, contradictions, but also continuities, in the ways in which people discuss and comment on their own and other people's perceptions and experiences of heterosexuality.

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