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We address the problem of structured sparse signal recovery when only certain statistical rather than exact properties describing the structure of the signal are available. Such problems arise in elimination of eye movement artifacts in waking EEG recordings; this task cannot be efficiently done using structured models that assume a common sparsity profile of fixed groups of components. We present...
The goal of the research is to substantiate a new technology for detecting anomalies in biomaterials in order to diagnose for existing and potential medical conditions. The general technique utilized is to expose the subject to specific frequency range of electromagnetic energy. Biomaterials comprising the subject are differentiated on the basis of their electromagnetic properties. Data collected...
The information on energy expenditure of people playing various types of sports can be exploited for diagnosing their physical conditions, which helps the avoidance of their diseases and injuries during sports activities. The energy expenditure can be calculated from oxygen consumption (VO2) that can be directly measured by a VO2 meter, however, it is not reasonable for people playing sports to wear...
Recently, as elderly people population grows, the burden on caretakers are getting larger. In day care center, caretakers are taking care records aiming to improve care receiver's Quality of Life. However, in the present situation, it's difficult for caretakers to record care receiver's activity in detail because each care worker needs to take care of several care receivers at the same time and it...
To improve the performance of a wireless capsule endoscope (WCE), it is strongly recommended to add the location information to the image data obtained by the WCE. However, there is a disadvantage that a lot of existing localization techniques require to measure channel model parameters in advance. To avoid such a burdensome pre-measurement, this paper pays attention to WCE localization based on three-dimensional...
This paper proposes a virtual Vital Signs Sensor (VSS) for visualization of half illness (so called "Mibyou") and sudden illness. Since both half and sudden illnesses, which are located in between wellness and illness, are categorized in healthy(H) to illness(I) transition(T) status. So, we name this status as HIT. Since HIT happens in an ordinary life, VSS for HIT visualization should work...
Recently a special attention has been directed toward indoor localization and body area networks for medical purposes which, has its root in their broad applicability in that area. We understand that time-of-arrival (ToA) based techniques provide immense accuracy compare to received-signal-strength (RSS) and the angle-of-arrival (AoA) based techniques in situations that line-of-sight (LOS) exists...
iBeacon, a novel beacon device aiming at proximity estimation was introduced in 2014 by Apple Inc. based on Bluetooth Low Energy (BLE) technology. iBeacon is utilized in our work to establish an in-room newborns localization system in hospitals. Since iBeacon can broadcast beacon signal every certain interval, we can adopt iBeacon instead of RFID for baby tracking. In this paper we developed a new...
In this paper we address selection of a protocol and of the respective parameters and communication mode for UWB-based active wireless indoor localization of machines and humans in, e.g., homes, hospitals. etc. First we discuss the specifics of targeted scenario and provide an insight to the operation of an IEEE 802.15.4-compatible UWB localization system, using Decawave's DW1000 UWB transceiver as...
The design of modern medical data information systems is driven by the need to collect and present data to authorized users. For collected medical data to be effective and improve patient treatment it must be transported from a device, aggregated, and analyzed to produce results that can be shared with care providers. Medical data may be analyzed and used years after collection at different locations...
Currently, capsule endoscopy (CE) is limited to diagnosis. However we have been trying to make a paradigm shift in capsule endoscopy (CE) by developing therapeutic capsule endoscopes. CE has always had the limitation of a short battery life. As conventional batteries do not have enough power (30W) to enable an electrical scalpel or a snare to resect lesions or coagulate bleeding vessels, we have been...
Wireless body area networks (WBANs) is a special designed sensor network to connect various medical sensors for health which emerges as the natural byproduct of existing sensor network technology and biomedical engineering. In this paper, the tradeoff between the total power consumption and the end-to-end rate in non-homogenous relay environment for WBANs has been investigated. We consider such scenario...
This article examines the effect of divergent human tissue types and volumes on the matchings of ultra-wideband (UWB) antennas. The work is based on measurements in an anechoic chamber with a vector network analyzer by sweeping a frequency range of 2–8 GHz. Two planar prototype UWB antenna types were applied: the dipole and the double loop antenna. The antennas were attached at a 20 mm distance from...
A new 3D foldable flexible slot antenna is proposed to be embedded in body-worn devices. It can accommodate skin-thin wearable devices while maintaining a radiation efficiency as high as 75%. The antenna is designed for on-body applications to be operated in 2.36–2.48 GHz frequency range, which covers both the medical body area network (MBAN) and the industrial, scientific and medical (ISM) frequencies...
Ground loop through the floor is often modeled in the transmission model of Human Body Communication (HBC). This paper reports evaluation of ground loop through the floor in HBC between two subjects shaking their hands, and HBC between a subject and a stationary receiver on the floor. Subjects wore a transmitter or a receiver on the wrist. Received signal strength was measured on carpet-covered aluminum...
This paper propose how to manage superframe of MAC protocol based on IEEE 802.15.6 with considering quality of service (QoS) of wireless body area network (WBAN) applications. In recent years, WBAN technology which can monitor vital information of patient with wearable device is receiving attention because of aging society problem. But, WBAN supports wide range of application such a military application,...
ECG steganography hides patient's confidential data into their Electrocardiogram during transmission/storage of medical records, in order to ensure protection of patient privacy. Efficiency of a steganography method can be estimated using imperceptibility and robustness of hidden data which are estimated using Peak Signal to Noise Ratio and Bit Error Rate metrics, respectively. In this research work,...
Recently, Wireless Body Area Network (WBAN) is attracting attention as a technology utilizes both medical care and communication technology. In WBAN, both medical and non-medical applications are assumed. Furthermore, different quality of service (QoS) is required depending on each kind of handled data. IEEE 802.15.6, which is an international standard of WBAN, specifies PHY and MAC layers in order...
Accurate localization of the endoscopy capsule can have a significant positive impact on disease diagnosis and treatment using wireless capsule endoscopy. This paper concerns the problem of accurate ranging for localization of an endoscopy capsule. Towards this objective, we propose a range estimator leveraging the use of ultra-wide band signaling and neural networks. Our results indicate the feasibility...
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