9 research outputs found
Development of auto-notification application for mobile device using geofencing technique
No full textAdvanced wireless technology for disaster management system framework development
No full textThis paper describes the development concept of
an integrated disaster management system based on advanced
wireless communication technology. The aim of the system is to
prepare, respond, recover and reduce the risk of a disaster
comprehensively by employing the latest technology in wireless
communication. The system comprises five main componentsWireless Monitoring and Alert, Resilient Wireless Mesh
Network, Energy Harvesting, Mobile Healthcare and
Evacuation Management System. The development of a highly
reliable and comprehensive disaster management system
enables first-hand information to be instantaneously analyzed
and acted upon by the most significant people to facilitate the
best actions to be taken and relayed to the people in charge
Development of Low-Cost IoT-Based Wireless Healthcare Monitoring System
No full textAccording to studies, up to 99 percent of alarms triggered in hospital units are false or clinically insignificant while indicating no genuine harm to patients. However, false alarms can lead to alert overload, causing healthcare workers to miss critical occurrences that could be harmful or even fatal. The purpose of this work is to tackle the problem by developing an integrated system that can continually track the patient's health condition utilising a cloud computing platform, allowing alerts to be targeted to the appropriate medical facility personnel in a timely and orderly manner. Arduino microcontrollers are used to collect health parameters such as temperature and pulse rate and provide a real-time monitoring system for medical practitioners. Multiple sensors and an RF transceiver are attached to a small microcontroller, forming a wearable module that the patient will wear. This wearable component is wirelessly connected to the main module consisting of a larger microcontroller, where the data is then uploaded to the database in the cloud through the internet. The data can then be accessed through a web-based terminal, providing medical practitioners access through the web page. If the system detects any abrupt changes to the patient's temperature or pulse rate, a push notification will be sent to the medical practitioner's Android smartphone so that immediate action can be taken. The system is scalable as multiple wearable modules can be connected to the main module, allowing monitoring of multiple patients simultaneously. More sensors can also easily be added to the wearable module to monitor other vital health parameters such as oxygen saturation and blood pressure. The testing has indicated that the system can achieve 99.4% accuracy in temperature monitoring and 86% accuracy for pulse monitoring
A Preliminary Study of Characterization Techniques for Reticle ESD Threshold Voltage Measurement
Get PDFRecent studies have revealed that reticle robustness towards electrostatic field is reducing since the feature’s critical dimension is getting smaller. Reticle electrostatic damage is seen after the features was subjected at low Electrostatic Discharged (ESD) voltages. This characterization was conducted on a Chrome-on-glass (COG)/Binary reticle metal layer for Complementary Metal-Oxide Semiconductor (CMOS) 250nm technology node. International Technology Roadmap for Semiconductor (ITRS) and Semiconductor Equipment and Materials International (SEMI) uses the results of this reticle electrostatic damaged characterization, extrapolates it and establishes electrostatic field limits for semiconductor industry. Generally, a semiconductor wafer fabrication company will refer to this guideline to set up an Electrostatic Protective Area (EPA) for the expansion of current facilities or new facilities. As CMOS technology node shrinks further to 130nm, the photolithography process becomes more challenging since it requires printing smaller features accurately. A newly advanced reticle, called PSM (Phase-shift Mask) reticle has been introduced. PSM reticle features are made of Molybdenum Silicide (MoSi) material, which is different from the Binary reticle that uses Chromium. Existing guideline for electrostatic control limit from ITRS and SEMI may not be sufficient to protect PSM reticle from ESD damaged due to the different material features and the smaller critical dimension (gap distance between two parallel lines). This paper proposed a future work for characterizing PSM reticle ESD threshold voltage measurement and documented the result in ITRS and SEMI as separate guideline. This study will benefit semiconductor industry to implement more accurate EPA according to reticle type and technology node. The previous characterization techniques will be reviewed and critically compared in order to gain a better understanding of the reticle ESD damaged mechanism and propose new techniques for characterizing reticle that reflect actual production environment, the latest features material and lower technology node
Optimization of Location Estimation Utilizing GDOP Technique with Cooperation of Relay Station
No full textGeometric Dilution of Precision (GDOP) has always played an important role in satellite navigation system. This paper presents the extension of GDOP as a location estimation technique to determine the location of a Relay Station (RS). The proposed RS scheme and architecture showed a promising potential in increasing the network coverage and extending the range of a base station. The simulation results indicate that the application of GDOP to optimize RS position has improved the Mobile station (MS) estimation accuracy
Improved Location and Positioning Utilizing Single MIMO Base Station in IMT-Advanced System
Get PDFThis paper discusses an improvement of location and positioning estimation using one of the IMT-Advanced systems known as the mobile WiMAX. The Single MIMO Base Station (SMBS) in mobile WiMAX is combined with a virtual technique, known as the Virtual Base Stations, created a novel algorithm for location and positioning (L&P) purposes. This algorithm based on the angle of arrival (AOA) and angle of departure (AOD) measurement parameter completed the new SMBS algorithm with virtual base station (SMVirBS). The developed algorithm includes the effect of the geometric dilution of precision (GDOP) to assist with the location estimation accuracy. The simulation results showed that the proposed SMVirBS technique always outperforms the linear least square (LLS) algorithm in terms of estimated location accuracy. The technique also has the capability to work well in non-line of sight errors (NLOS)
Overview of Positioning Techniques for LTE Technology
Get PDFThis paper explains about the capabilities of location positioning in wireless broadband communications and potential of hybrid positioning which are based on long term evolution (LTE) system. Mobile positioning technology has become a widely used in condition such as emergency and also in commercial services. Nowadays, with the presence of LTE technology there is a new mission on enabling Enhanced 911 (E911) and location-based services (LBS) on these 4G/5G networks. The positioning methods that were supported for LTE technology are Enhanced Cell ID (E-CID) method, Observed Time Difference of Arrival (OTDOA) and Global Navigation Satellite Systems (GNSS). A hybrid positioning system is a combination of such technologies and improves positioning accuracy by implementing the different mechanisms of the different technologies. In particular, this paper describes a concept and principle of each technique and explores important technical details of the location positioning techniques
Analysis on Energy and Coverage Issues in Wireless Sensor Network
Get PDFTwo major fundamental issues in Wireless Sensor Network (WSN) are energy efficiency and coverage. Energy efficiency is the result of controlling and maintaining the energy usage. A method is considered as energy efficient if it can provide more services with the same amount of energy input, while coverage efficiency is measured by how long and how well a sensor monitors the subjected area. Hence, to obtain an energy and coverage efficiency, maximizing the coverage by reducing the energy consumption needs to be achieved. Our paper presents the potential of Derivative Harmon Search Algorithm (DHSA) in a connected WSN to achieve deployment of node that can cover optimal area and at the same time give low energy consumption
