An Intelligent Telecardiology System Using a Wearable and Wireless ECG to Detect Atrial Fibrillation

This study presents a novelwireless, ambulatory, realtime, and autoalarm intelligent telecardiology system to improve healthcare for cardiovascular disease, which is one of the most prevalent and costly health problems in the world. This system consists of a lightweight and power-saving wireless ECG device equipped with a built-in automatic warning expert system. This device is connected to a mobile and ubiquitous real-time display platform. The acquired ECG signals are instantaneously transmitted to mobile devices, such as netbooks or mobile phones through Bluetooth, and then, processed by the expert system. An alert signal is sent to the remote database server, which can be accessed by an Internet browser, once an abnormal ECG is detected. The current version of the expert system can identify five types of abnormal cardiac rhythms in real-time, including sinus tachycardia, sinus bradycardia, wide QRS complex, atrial fibrillation (AF), and cardiac asystole, which is very important for both the subjects who are being monitored and the healthcare personnel tracking cardiac-rhythm disorders. The proposed system also activates an emergency medical alarm system when problems occur. Clinical testing reveals that the proposed system is approximately 94% accurate, with high sensitivity, specificity, and positive prediction rates for ten normal subjects and 20 AF patients. We believe that in the future a business-card-like ECG device, accompanied with a mobile phone, can make universal cardiac protection service possible.

Development of Remote Waste Gas Monitor System

In order to effectively supervise factory chimney waste gas circumstance, a kind of remote waste gas monitor system is designed, with the ARM as its core controller, collects the chimney pollutant indexes consisting of exhaust particulate, sulfur oxides, carbon oxides as well as nitrogen oxides through different gas sensors, and takes advantage of Global Positioning System(GPS) to obtain the chimney position accurately, after that, the information it collects is transmitted to the center control computer via GSM or the complete public switched telephone network. Moreover, in order to provide the environment protection departments convenience in supervising factories making little environmental pollution, the system also uses Global System for Mobile Communications wireless transmission way in which it alarms when the collected data exceeds the national standards. All the real-time data is not only transmitted by the public switched telephone network or GSM system to the core computer, but also stored into SD memory card through SPI interface. Practical run shows that the system is well realized the function of GPS positioning, remote data transmission, exceeding-standard-alarming, and data storage, and the precision of system is no higher than 2.5 percent.

GPS-GSM Integration for Enhancing Public Transportation Management Services

This paper proposes and implements a solution for enhancing public transportation management services based on GPS and GSM in Punjab province of Pakistan. The system consists of four modules: BUS Station Module, In-BUS Module, BASE Station Module and BUS Stop Module. Equipped with PC and GSM modem, BUS Station Module sends the initialization information containing the bus number and license plate number to In-BUS Module and BASE Station Module using SMS. The microcontroller based In-BUS Module consisting mainly of a GPS receiver and GSM modem then starts transmitting its location and number of passengers to BASE Station Module. BASE Station Module equipped with a microcontroller unit and GSM modems interfaced to PCs is designed to keep track record of every bus, processes user request about a particular bus location out of BUS Station and updates buses location on bus stops. BUS Stop Module is installed at every bus stop and consists of a GSM modem, memory unit and dot matrix display all interfaced to a microcontroller. This module receives buses location information coming towards that stop from BASE Station module and displays the information on a dot matrix display. A per stop statistical analysis is carried out based on the number of passengers and a recommendation report along with this analysis is sent to Punjab Government Transportation Department to have a check on the performance and services offered by transporters to common people. The results have shown that the developed system is useful for facilitating people using public transportation services.

Gsm Based Ecg Tele-Alert System

Cardiac arrest is quoted as the major contributor to sudden and unexpected death rate in the modern stress filled lifestyle around the globe. A system that warns the person about the onset of the disease earlier automatically will be a boon to the society. This is achievable by deploying advances in wireless technology to the existing patient monitoring system. This paper proposes the development of a module that provides mobility to the doctor and the patient, by adopting a simple and popular technique, detecting the abnormalities in the bio signal of the patient in advance and sending an alert sms to the doctor through Global system for Mobile(GSM) thereby taking suitable precautionary measures thus reducing the critical level of the patient.

Power-Accuracy Tradeoffs in Human Activity Transition Detection

Wearable, mobile computing platforms are envisioned to be used in out-patient monitoring and care. These systems continuously perform signal filtering, transformations, and classification, which are quite compute intensive, and quickly drain the system energy. The design space of these human activity sensors is large

and includes the choice of sampling frequency, feature detection algorithm, length of the window of transition detection etc., and all these choices fundamentally trade-off power/performance for accuracy of detection. In this work, we explore this design space, and make several interesting conclusions that can be used as rules of thumb for quick, yet power-efficient designs of such systems. For instance, we find that the x-axis of our signal, which was oriented to be parallel to the forearm, is the most important signal to be monitored, for our set of hand activities. Our experimental results show that by carefully choosing system design parameters, there is considerable (5X) scope of improving the performance/power of the system, for minimal (5%) loss in accuracy.

Self-Sustaining Control of Two-Wheel Mobile Manipulator using Sliding Mode Control

Two wheel mobile manipulator has the potential to become multi-skilled robot in the field of robotics engineering and it is already implemented by using inverted pendulum control. Centre of gravity position is controlled to achieve the balancing of robot. Due to the unbalanced nature and the nonholonomic property of the twowheel mobile manipulator, balancing is challenging task. On the other hand sliding mode control is a good candidate to address the nonlinear/under actuated system. This paper presents the control methods for balancing of two-wheel mobilem manipulator. This paper proposes a novel second order sliding mode controller using twisting algorithm, disturbance observer and dynamics of double inverted pendulum. Dynamics of double inverted pendulum is used to design the control equation of sliding mode controller. Twisting algorithm is used to design the control input. Disturbance observer is compensated model uncertainties and external disturbances. Posture of two wheel mobile manipulator can successfully

stabilized by this novel controller

ZigBee-based Vehicle Access Control System

Vehicle access control system is an important sub-system of the intelligentized residence section. Today, in a growing emphasis on personal and property safety, the control of vehicles’ access authorization and the management of the vehicles’ access authority, access time and access method via computer, is safe and convenient. This paper describes a set of vehicle access control system based on ZigBee wireless technology. In this system, ZigBee coordinator and its terminal nodes installed respectively in the entrance of the district and the vehicles, together form a ZigBee wireless sensor network. This paper mainly introduces the overall structure, hardware platform and software design of this system. The implementation and performance tests of this system are fairly good.