scholarly journals An Internet of Things infrastructure for gait characterization in assisted living environments and its application in the discovery of associations between frailty and cognition

2019 ◽  
Vol 15 (10) ◽  
pp. 155014771988354
Author(s):  
Iván González ◽  
Fco Javier Navarro ◽  
Jesús Fontecha ◽  
Luis Cabañero-Gómez ◽  
Ramón Hervás
Keyword(s):  
Cohort Study ◽  
Internet Of Things ◽  
Local Area Network ◽  
Low Cost ◽  
Elderly Care ◽  
Local Area ◽  
Area Network ◽  
Cross Sectional ◽  
Frail Elders ◽  
Stride Interval

This article presents an easy-to-deploy and low-cost Internet of Things infrastructure for gait characterization based on a set of wireless inertial sensors, called nodes, connected to the same local area network. These nodes allow acquiring inertial raw data from the trunk of each frail elder involved in explicit gait trials carried out directly in the elderly care homes. The Internet of Things infrastructure has been validated for Quantitative Gait Analysis showing an adequate accuracy in the demarcation of relevant gait events and in the estimation of stride interval variability. The latter, in combination with other characteristics that are commonly used to assess the state of frail elders and which come from anthropometric, biological, nutritional, functional, and mobility domains, allows us to perform a cross-sectional cohort study and a subsequent multiple logistic regression to evaluate their impact on cognitive functioning. The cohort study and the multivariate regression are performed using a sample of 81 frail elders from two nursing homes in Spain. The results obtained indicate that frail elders aged 90 years or older, with moderate dependence in daily functioning and with a stride interval gait variability greater than 6%, were most likely to suffer cognitive impairment, representing what is called cognitive frail.

Home Networking Technology Applied in Smart Home System

2013 ◽  
Vol 468 ◽  
pp. 141-144
Author(s):  
Su Hua Chen ◽  
Yong Guang Liu ◽  
Xu Fang
Keyword(s):  
Smart Home ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
High Reliability ◽  
Low Cost ◽  
Data Communication ◽  
Local Area ◽  
Area Network ◽  
Home Networking ◽  
The Right

Smart home system mainly consists of home networking, wireless local area network and external network, and with the advantages of low cost and high reliability, Zigbee wireless technology is the right choice for smart home system and the main part of home networking. The design of smart home system based on Zigbee is proposed, the Zigbeethe design process of the systemintelligent socket and data communication rule are elaborated. The system has been applied in smart community of Shaoxing Electric Power Bureau, which has good performances, high availability and reliability, better market prospects.

scholarly journals Design and implementation of seat occupancy detection system

2019 ◽  
Vol 37 (2) ◽  
pp. 26-42
Author(s):  
B. Kommey ◽  
E. O. Addo ◽  
K. A. Adjei
Keyword(s):  
Local Area Network ◽  
Detection System ◽  
Low Cost ◽  
Local Area ◽  
Base Station ◽  
Area Network ◽  
Design And Implementation ◽  
Loading Mode ◽  
Occupancy Detection ◽  
Occupancy Monitoring

Location of appropriate seats in seating areas of theaters remains a significant challenge that patrons of these enterprises face. There is therefore, the need for seat occupancy monitoring system to provide readily accessible seat occupancy information to clients and management of these halls. This paper presents the design and implementation of a low cost seat occupancy detection and display system which is capable of monitoring seat occupancy in halls efficiently.  The system uses capacitive seat sensors which is designed based on the loading mode technology. It detects the presence of a human occupant using a single electrode. Occupancy data is relayed to a WiFi-enabled microcontroller unit which processes the data and wirelessly transfers the processed data to a central base station over a local area network for graphical and numerical display. Commands are also transferred from the base station to the microcontroller units when needed. Theoretical and empirical results show that the system is able to achieve seat occupancy monitoring accurately, neatly and cost effectively.Keywords: Capacitive sensing, seat occupancy, sensor cluster, microstrip transmission line, Wi-Fi 

scholarly journals Time Domain Performance of Reconfigurable Filter Antenna for IR-UWB, WLAN, and WiMAX Applications

Electronics ◽  
2019 ◽  
Vol 8 (9) ◽  
pp. 1007
Author(s):  
Zhuohang Zhang ◽  
Zhongming Pan
Keyword(s):  
Time Domain ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Low Cost ◽  
Time Domain Analysis ◽  
Local Area ◽  
Ultra Wideband ◽  
Area Network ◽  
Compact Size ◽  
The Time Domain

A novel reconfigurable filter antenna with three ports for three dependent switchable states for impulse radio-ultrawideband (IR-UWB)/wireless local area network (WLAN)/worldwide interoperability for microwave access (WiMAX) applications is presented in this paper. Three positive-intrinsic-negative diodes, controlled by direct current, are employed to realize frequency reconfiguration of one ultra-wideband state and two narrowband states (2.4 GHz and 3.5 GHz). The time domain characteristic of the proposed antenna in the ultra-wideband state is studied, because of the features of the IR-UWB system. The time domain analysis shows that the reconfigurable filtering antenna in the wideband state performs similarly to the original UWB antenna. The compact size, low cost, and expanded reconfigurable filtering features make it suitable for IR-UWB systems that are integrated with WLAN/WiMAX communications.

Remote Monitoring System for Unattended Electromechanical Equipment Based on Internet

2012 ◽  
Vol 466-467 ◽  
pp. 1176-1180
Author(s):  
Gui Ping Wang ◽  
Er Dong Jia ◽  
Li Min Guan ◽  
Yun Ting Bai ◽  
Xiao Yan Ma
Keyword(s):  
Monitoring System ◽  
Remote Monitoring ◽  
Local Area Network ◽  
Low Cost ◽  
Warning System ◽  
Local Area ◽  
Area Network ◽  
Remote Monitoring System ◽  
Active Server Page ◽  
Electromechanical Equipment

The unattended electromechanical equipments are widely distributed in the harsh environment, which makes it difficult to construct the monitoring system. Therefore, this paper proposes a solution of the remote monitoring system based on Internet, which applies the VLAN (Virtual Local Area Network) technology in constructing the network. The network microprocessor STM32F107 is adopted to design a low-cost remote information terminal. The system software is designed based on B/S (Browser/Server) architecture by ASP (Active Server Page) technology, which implements SCADA (Supervisory Control and Data Acquisition) and pre-warning system for the unattended electromechanical equipments. The application shows that the system is stable, reliable and worth popularizing.

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