scholarly journals Analyzing the Performance of WBAN Links during Physical Activity Using Real Multi-Band Sensor Nodes

2021 ◽  
Vol 11 (7) ◽  
pp. 2920
Author(s):  
Alba Rozas ◽  
Alvaro Araujo ◽  
Jan M. Rabaey
Keyword(s):  
The Body ◽  
Sensor Nodes ◽  
Body Parts ◽  
Huge Amount ◽  
Body Area ◽  
Node Placement ◽  
Empirical Performance ◽  
Signal Path ◽  
Real Hardware ◽  
Wireless Interfaces

Wireless body area networks (WBANs) present unique challenges due to their specific characteristics of mobility and over-the-body radio propagation. A huge amount of factors—both internal and external to the network—affect WBAN channel conditions, so a reliable and comprehensive theoretical model of these communications is unfeasible and impractical in real scenarios. Thus, an empirical performance analysis of several WBAN channels is presented in this work, based on the receiver signal strength indicator (RSSI) and packet reception rate (PRR) metrics. Four different static and dynamic activities have been characterized: standing, sitting, cycling and walking. This analysis confirms the theoretical notions of path attenuation due to body parts obstructing the signal path, while serving as a benchmark for the design of future algorithms. The experiments have been carried out with real hardware nodes with wireless interfaces in three ISM bands: 433 MHz, 868 MHz and 2.4 GHz, evaluating the effect of the transmit power and node placement for different subjects. In all scenarios, the PRR metric reaches its maximum of 100% for both sub-GHz bands. Finally, our study concludes that the RSSI metric is sufficient to exploit the periodicity of dynamic activities, without the need for any extra hardware resources.

Egocentric Performance Capture: A Review

2020 ◽  
pp. 64-73
Author(s):  
Shivam Grover ◽  
◽  
◽  
◽  
Kshitij Sidana ◽  
...  
Keyword(s):  
The Body ◽  
First Person ◽  
Body Parts ◽  
Human Beings ◽  
Huge Amount ◽  
Person Perspective ◽  
Wearable Cameras ◽  
The Subject ◽  
Performance Capture ◽  
Traditional Performance

Performance capture of human beings have been used to animate 3D characters for movies and games for several decades now. Traditional performance capture methods require a dedicated costly setup which usually consists of more than one sensor placed at a distance from the subject, hence requiring a large amount of budget and space to accomodate. This lowers its feasibility and portability by a huge amount. Egocentric (first-person/wearable) cameras, however, are attached to the body and hence are mobile. With a rise of acceptance of wearable technology by the general public, wearable cameras have gotten cheaper too. We can make use of their excessive portability in the performance capture domain. However working with egocentric images is a mammoth task as the views are severely distorted due to the first-person perspective and the body parts farther from the camera are highly prone to being occluded. In this paper, we review the existing state-of-the-art methods about performance capture using egocentric based views.

scholarly journals Multi-Objective Optimization of a Wireless Body Area Network for Varying Body Positions

Sensors ◽  
2018 ◽  
Vol 18 (10) ◽  
pp. 3406 ◽  
Author(s):  
Łukasz Januszkiewicz ◽  
Paolo Di Barba ◽  
Sławomir Hausman
Keyword(s):  
Wireless Body Area Network ◽  
Design Procedure ◽  
Wireless Channel ◽  
The Body ◽  
The Other ◽  
Sensor Nodes ◽  
Field Analysis ◽  
Evolutionary Strategy ◽  
Area Network ◽  
Body Area

The purpose of this research was to improve the performance of a wireless body area sensor network, operating on a person in the seated and standing positions. Optimization-focused on both the on-body transmission channel and off-body link performance. The system consists of three nodes. One node (on the user’s head) is fixed, while the positions of the other two (one on the user’s trunk and the other on one leg) with respect to the body (local coordinates) are design variables. The objective function used in the design process is characterized by two components: the first controls the wireless channel for on-body data transmission between the three sensor nodes, while the second controls the off-body transmission between the nodes and a remote transceiver. The optimal design procedure exploits a low-cost Estra, which is an evolutionary strategy optimization algorithm linked with Remcom XFdtd, a full-wave Finite-Difference Time-Domain (FDTD) electromagnetic field analysis package. The Pareto-like approach applied in this study searches for a non-dominated solution that gives the best compromise between on-body and off-body performance.

scholarly journals Observed Body Clustering for Imitation Based on Value System

2010 ◽  
Vol 14 (7) ◽  
pp. 802-812 ◽  
Author(s):  
Yoshihiro Tamura ◽  
◽  
Yasutake Takahashi ◽  
Minoru Asada ◽  
◽  
...  
Keyword(s):  
Reinforcement Learning ◽  
The State ◽  
The Body ◽  
Temporal Difference ◽  
Body Parts ◽  
Body Area ◽  
Behavior Observation ◽  
Camera Image ◽  
Value Estimation ◽  
And Behavior

In order to develop skills, actions, and behavior in a human symbiotic environment, a robot must learn something from behavior observation of predecessors or humans. Recently, robotic imitation methods based on many approaches have been proposed. We have proposed reinforcement learning based approaches for the imitation and investigated them under an assumption that an observer recognizes the body parts of the performer and maps them to the ones of its own. However, the assumption is not always applicable because of physical differences between the performer and the observer. In order to learn various behaviors from the observation, the robot has to cluster the observed body area of the performer on the camera image and maps the clustered parts to its own body parts based on reasonable criterion for itself and feedback the data for the imitation. This paper shows that the clustering the body area on the camera image into the body parts of its own based on the estimation of the state value in a framework of reinforcement learning as well as it imitates the observed behavior based on the state value estimation. Clustering parameters are updated based on the temporal difference error analogously so the parameters of the state value function of the behavior are updated based on the temporal difference error. The validity of the proposed method is investigated by applying it to an imitation of a dynamic throwing motion of an inverted pendulum robot and human.

scholarly journals Increasing Lifetime through Sleep Awake and Conditional Transmission in Wireless Body Area Networks

2019 ◽  
Vol 13 (02) ◽  
pp. 141
Author(s):  
Karthik Jayaraman ◽  
A. Rajesh
Keyword(s):  
Energy Consumption ◽  
Life Time ◽  
Body Area Networks ◽  
Wireless Body Area Networks ◽  
The Body ◽  
Sensor Nodes ◽  
Body Area ◽  
Battery Capacity ◽  
More Care ◽  
Body Sensors

Human health is being monitored by wireless sensors from their home using wireless body area networks. Increase in the wireless body sensors made human to monitor health with great ease. Patient need not be stay in hospital for long time instead they may use body sensors and they may monitor their health from their residence itself. So that patients easily will be moving around their residence. Even though development of technology made ease of every task there are also constraints that need to be reduced. Since the body nodes are very tiny the battery used for the sensor is also small, in turn the battery capacity is also greatly reduced. So the life time of the sensor nodes are very low and in turn network lifetime also will be very less. In order to increase the life time of the node energy consumption should be monitored with more care. In our proposed system we implement sleep awake method along with conditional transmission to reduce the energy consumption that automatically increases the life time of the node as well as network. Our proposed method gives better result when compare with the performance of other methods in saving energy.

scholarly journals Interference Aware Priority Based Packet Forwarding in Wireless Sensor Network using Bluetooth

2019 ◽  
Vol 8 (3S2) ◽  
pp. 177-180
Keyword(s):  
Wireless Sensor Networks ◽  
Wireless Sensor Network ◽  
Sensor Networks ◽  
Sensor Network ◽  
The Body ◽  
Sensor Nodes ◽  
Wireless Sensor ◽  
Body Sensor Networks ◽  
Body Parts ◽  
Packet Forwarding

Wireless Sensor Networks consists of several nodes that are distributed over a particular area. These sensor nodes are able to sense the changes in environmental parameters like temperature and carbon monoxide. Depending upon the ability each sensor node possess the type of wireless sensor networks may vary: that is either Homogeneous or Heterogeneous. This particular paper is concentrated on a homogeneous network. In this paper, an Interference Aware Priority based Packet Forwarding in Wireless Sensor Network using Bluetooth (IAPFB) scheme is proposed which helps in the congestion control in Wireless Sensor Network. The main idea behind this paper is that ; avoid the interference and collision between the nodes in the network while transmitting the data packets and also the higher priority data must forwarded first than a low priority one. The main application of this concept is the Body Sensor Networks. That is the body sensors for grabbing the signals from various body parts is used as the operating network. Signals from different body parts may have different priority levels and the proposed scheme can easily deal with the priorities. Simulated results shows comparatively good results for the proposed method.

scholarly journals A Bidirectional Adaptive Multihop Routing Algorithm for Wireless Body Area Networks

2020 ◽  
Author(s):  
Abdelrahman Miky ◽  
Mohamed Saleh ◽  
Bassem Mokhtar ◽  
M. R. M. Rizk
Keyword(s):  
Network Lifetime ◽  
Routing Algorithm ◽  
Body Area Networks ◽  
Wireless Body Area Networks ◽  
The Body ◽  
Sensor Nodes ◽  
Area Network ◽  
Body Area ◽  
Logic Function ◽  
Network Tree

Wireless Body Area Networks are composed of sensor nodes that may be implanted in the body or worn on it. A node is composed of a sensing unit, a processor and a radio unit. One of the nodes, the sink, acts as a gateway between the body area network and other networks such as the Internet. We propose a routing protocol that constructs paths between nodes such that the final network topology is a tree rooted at the sink. The protocol's aim is to increase network lifetime and reliability, and to adapt to network conditions dynamically. Moreover, the protocol enables communications between nodes and sink both in the upstream direction, from nodes to sink, and in the downstream direction from sink to nodes. When the network tree is constructed, a node chooses its parent, i.e., next hop to sink, by using one of various criteria. Namely, these are the number of hops between parent and sink, energy level of parent, received signal strength from parent, number of current parent's children, and a fuzzy logic function that combines multiple criteria. Moreover, as time progresses the tree structure may dynamically change to adapt to conditions such as the near-depletion of a routing node's energy. Simulation results show improvements in network lifetime and energy consumption over the older version of the protocol.

Formulation, Design and Development of Niosome Based Topical Gel for Skin Cancer

2017 ◽  
Vol 2 (3) ◽  
Keyword(s):  
Skin Cancer ◽  
Drug Release ◽  
Hemorrhagic Cystitis ◽  
The Body ◽  
Cancer Drug ◽  
Inversion Method ◽  
Body Parts ◽  
Basal Cells ◽  
Formulation Design ◽  
Topical Gel

Melanoma is the most dangerous type of skin cancer in which mostly damaged unpaired DNA starts mutating abnormally and staged an unprecedented proliferation of epithelial skin to form a malignant tumor. In epidemics of skin, pigment-forming melanocytes of basal cells start depleting and form uneven black or brown moles. Melanoma can further spread all over the body parts and could become hard to detect. In USA Melanoma kills an estimated 10,130 people annually. This challenge can be succumbed by using the certain anti-cancer drug. In this study design, cyclophosphamide were used as a model drug. But it has own limitation like mild to moderate use may cause severe cytopenia, hemorrhagic cystitis, neutropenia, alopecia and GI disturbance. This is a promising challenge, which is caused due to the increasing in plasma drug concentration above therapeutic level and due to no rate limiting steps involved in formulation design. In this study, we tried to modify drug release up to threefold and extended the release of drug by preparing and designing niosome based topical gel. In the presence of Dichloromethane, Span60 and cholesterol, the initial niosomes were prepared using vacuum evaporator. The optimum percentage drug entrapment efficacy, zeta potential, particle size was found to be 72.16%, 6.19mV, 1.67µm.Prepared niosomes were further characterized using TEM analyzer. The optimum batch of niosomes was selected and incorporated into topical gel preparation. Cold inversion method and Poloxamer -188 and HPMC as core polymers, were used to prepare cyclophosphamide niosome based topical gel. The formula was designed using Design expert 7.0.0 software and Box-Behnken Design model was selected. Almost all the evaluation parameters were studied and reported. The MTT shows good % cell growth inhibition by prepared niosome based gel against of A375 cell line. The drug release was extended up to 20th hours. Further as per ICH Q1A (R2), guideline 6 month stability studies were performed. The results were satisfactory and indicating a good formulation approach design was achieved for Melanoma treatment.

Re-imagining Reproduction: Unsettling Metaphors in the History of Imperial Science and Commercial Surrogacy in India

Somatechnics ◽  
2015 ◽  
Vol 5 (1) ◽  
pp. 88-103 ◽  
Author(s):  
Kalindi Vora
Keyword(s):  
Assisted Reproductive Technologies ◽  
Reproductive Technologies ◽  
The Body ◽  
Body Parts ◽  
Colonial History ◽  
Women's Bodies ◽  
Commercial Surrogacy ◽  
Art Practices ◽  
History Of ◽  
Travel Industry

This paper provides an analysis of how cultural notions of the body and kinship conveyed through Western medical technologies and practices in Assisted Reproductive Technologies (ART) bring together India's colonial history and its economic development through outsourcing, globalisation and instrumentalised notions of the reproductive body in transnational commercial surrogacy. Essential to this industry is the concept of the disembodied uterus that has arisen in scientific and medical practice, which allows for the logic of the ‘gestational carrier’ as a functional role in ART practices, and therefore in transnational medical fertility travel to India. Highlighting the instrumentalisation of the uterus as an alienable component of a body and subject – and therefore of women's bodies in surrogacy – helps elucidate some of the material and political stakes that accompany the growth of the fertility travel industry in India, where histories of privilege and difference converge. I conclude that the metaphors we use to structure our understanding of bodies and body parts impact how we imagine appropriate roles for people and their bodies in ways that are still deeply entangled with imperial histories of science, and these histories shape the contemporary disparities found in access to medical and legal protections among participants in transnational surrogacy arrangements.

Deadlift Recognition and Application based on Multiple Modalities using Recurrent Neural Network

2020 ◽  
Vol 2020 (17) ◽  
pp. 2-1-2-6
Author(s):  
Shih-Wei Sun ◽  
Ting-Chen Mou ◽  
Pao-Chi Chang
Keyword(s):  
Neural Network ◽  
Recurrent Neural Network ◽  
Network Structure ◽  
Inertial Sensors ◽  
Body Movement ◽  
The Body ◽  
Body Parts ◽  
Multimodal Sensing ◽  
Multiple Devices ◽  
Neural Network Structure

To improve the workout efficiency and to provide the body movement suggestions to users in a “smart gym” environment, we propose to use a depth camera for capturing a user’s body parts and mount multiple inertial sensors on the body parts of a user to generate deadlift behavior models generated by a recurrent neural network structure. The contribution of this paper is trifold: 1) The multimodal sensing signals obtained from multiple devices are fused for generating the deadlift behavior classifiers, 2) the recurrent neural network structure can analyze the information from the synchronized skeletal and inertial sensing data, and 3) a Vaplab dataset is generated for evaluating the deadlift behaviors recognizing capability in the proposed method.

Our Bodies, Whose Property?

2013 ◽  
Author(s):  
Anne Phillips
Keyword(s):  
Labor Markets ◽  
Personal Autonomy ◽  
The Body ◽  
Body Parts ◽  
Complex Issue ◽  
Human Organs ◽  
Property Owners ◽  
The Common ◽  
The Difference ◽  
The Right

No one wants to be treated like an object, regarded as an item of property, or put up for sale. Yet many people frame personal autonomy in terms of self-ownership, representing themselves as property owners with the right to do as they wish with their bodies. Others do not use the language of property, but are similarly insistent on the rights of free individuals to decide for themselves whether to engage in commercial transactions for sex, reproduction, or organ sales. Drawing on analyses of rape, surrogacy, and markets in human organs, this book challenges notions of freedom based on ownership of our bodies and argues against the normalization of markets in bodily services and parts. The book explores the risks associated with metaphors of property and the reasons why the commodification of the body remains problematic. The book asks what is wrong with thinking of oneself as the owner of one's body? What is wrong with making our bodies available for rent or sale? What, if anything, is the difference between markets in sex, reproduction, or human body parts, and the other markets we commonly applaud? The book contends that body markets occupy the outer edges of a continuum that is, in some way, a feature of all labor markets. But it also emphasizes that we all have bodies, and considers the implications of this otherwise banal fact for equality. Bodies remind us of shared vulnerability, alerting us to the common experience of living as embodied beings in the same world. Examining the complex issue of body exceptionalism, the book demonstrates that treating the body as property makes human equality harder to comprehend.

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