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  • Bild, Christine (1)
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21 search hits

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Classification of sleep stages (2016)
Gaiduk, Maksym ; Seepold, Ralf ; Martínez Madrid, Natividad
Sleep phase identification based on non-invasive recordings (2016)
Klein, Agnes ; Martínez Madrid, Natividad ; Seepold, Ralf ; Gaiduk, Maksym
A sensor grid for pressure and movement detection supporting sleep phase analysis (2017)
Gaiduk, Maksym ; Kuhn, Ina ; Seepold, Ralf ; Ortega, Juan Antonio ; Martínez Madrid, Natividad
Sleep quality and in general, behavior in bed can be detected using a sleep state analysis. These results can help a subject to regulate sleep and recognize different sleeping disorders. In this work, a sensor grid for pressure and movement detection supporting sleep phase analysis is proposed. In comparison to the leading standard measuring system, which is Polysomnography (PSG), the system proposed in this project is a non-invasive sleep monitoring device. For continuous analysis or home use, the PSG or wearable Actigraphy devices tends to be uncomfortable. Besides this fact, they are also very expensive. The system represented in this work classifies respiration and body movement with only one type of sensor and also in a non-invasive way. The sensor used is a pressure sensor. This sensor is low cost and can be used for commercial proposes. The system was tested by carrying out an experiment that recorded the sleep process of a subject. These recordings showed the potential for classification of breathing rate and body movements. Although previous researches show the use of pressure sensors in recognizing posture and breathing, they have been mostly used by positioning the sensors between the mattress and bedsheet. This project however, shows an innovative way to position the sensors under the mattress.
PredTour - predicting tourism movements (2017)
Thimm, Tatjana ; Bild, Christine ; Gaiduk, Maksym ; Scherz, Wilhelm Daniel ; Seepold, Ralf ; Hüttermann, Marcel ; Hannich, Frank ; Haarmann, Jens
Peer reviewed abstract, 10.11.2017
Automatic sleep stages classification using respiratory, heart rate and movement signals (2018)
Gaiduk, Maksym ; Penzel, Thomas ; Ortega, Juan Antonio ; Seepold, Ralf
Objective: This paper presents an algorithm for non-invasive sleep stage identification using respiratory, heart rate and movement signals. The algorithm is part of a system suitable for long-term monitoring in a home environment, which should support experts analysing sleep. Approach: As there is a strong correlation between bio-vital signals and sleep stages, multinomial logistic regression was chosen for categorical distribution of sleep stages. Several derived parameters of three signals (respiratory, heart rate and movement) are input for the proposed method. Sleep recordings of five subjects were used for the training of a machine learning model and 30 overnight recordings collected from 30 individuals with about 27 000 epochs of 30 s intervals each were evaluated. Main results: The achieved rate of accuracy is 72% for Wake, NREM, REM (with Cohen's kappa value 0.67) and 58% for Wake, Light (N1 and N2), Deep (N3) and REM stages (Cohen's kappa is 0.50). Our approach has confirmed the potential of this method and disclosed several ways for its improvement. Significance: The results indicate that respiratory, heart rate and movement signals can be used for sleep studies with a reasonable level of accuracy. These inputs can be obtained in a non-invasive way applying it in a home environment. The proposed system introduces a convenient approach for a long-term monitoring system which could support sleep laboratories. The algorithm which was developed allows for an easy adjustment of input parameters that depend on available signals and for this reason could also be used with various hardware systems.
Sleep position recognition in home environment (2018)
Gaiduk, Maksym ; Seepold, Ralf ; Rodríguez de Trujillo, Eva
This paper presents a bed system able to analyze a person’s movement, breathing and recognize the positions that the subject is lying on the bed during the night without any additional physical contact. The measurements are performed with sensors placed between the mattress and the bed-frame. An Intel Edison board was used as an endpoint that served as a communication node from the mesh network to external service. Two nodes and Intel Edison are attached to the bottom of the bed frame and they are connected to the sensors. First test results have indicated the potential of the proposed approach for the recognition of sleep positions with 83% of correct recognized positions.
A review of health monitoring systems using sensors on bed or cushion (2018)
Conti, Massimo ; Orcioni, Simone ; Martínez Madrid, Natividad ; Gaiduk, Maksym ; Seepold, Ralf
An approach for a sleep tracking system (2018)
Rodríguez De Trujillo, Eva ; Gaiduk, Maksym ; Seepold, Ralf
The overall goal of this work is to detect and analyze a person's movement, breathing and heart rate during sleep in a common bed overnight without any additional physical contact. The measurement is performed with the help of sensors placed between the mattress and the frame.
A review of health monitoring systems using sensors on beds or cushion (2018)
Orcioni, Simone ; Conti, Massimo ; Martínez Madrid, Natividad ; Gaiduk, Maksym ; Seepold, Ralf
How technology can answer the challenge that currently population ageing is facing to the healthcare system? In this work, systems and devices related to “smart bed” and cushion, that are commercially available or matter of research works, are reviewed.
Non-invasive sleep analysis with intelligent sensors (2018)
Gaiduk, Maksym ; Seepold, Ralf ; Orcioni, Simone ; Conti, Massimo ; Martínez Madrid, Natividad
Sleep study can be used for detection of sleep quality and in general bed behaviors. These results can helpful for regulating sleep and recognizing different sleeping disorders of human. In comparison to the leading standard measuring system, which is Polysomnography (PSG), the system proposed in this work is a non-invasive sleep monitoring device. For continuous analysis or home use, the PSG or wearable Actigraphy devices tends to be uncomfortable. Besides, these methods not only decrease practicality due to the process of having to put them on, but they are also very expensive. The system proposed in this paper classifies respiration and body movement with only one type of sensor and also in a noninvasive way. The sensor used is a pressure sensor. This sensor is low cost and can be used for commercial proposes. The system was tested by carrying out an experiment that recorded the sleep process of a subject. These recordings showed excellent results in the classification of breathing rate and body movements.
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