scholarly journals AUSTRALIA-JAPAN QZSS EMERGENCY WARNING SERVICE TRIAL PROJECT

2020 ◽  
Vol XLIV-3/W1-2020 ◽  
pp. 21-28
Author(s):  
S. Choy ◽  
Y. B. Bai ◽  
S. Zlatanova ◽  
A. Diakite ◽  
E. Rubinov ◽  
...  
Keyword(s):  
Field Tests ◽  
Warning System ◽  
Relevant Information ◽  
Satellite System ◽  
Ground Station ◽  
Warning Message ◽  
South Wales ◽  
Spatial Coverage ◽  
Message Structure ◽  
Tsunami Warnings

Abstract. This paper provides an overview and the results of the Australia-Japan 2020 Quasi Zenith Satellite System (QZSS) Emergency Warning System trial project. The project aimed to evaluate and demonstrate the feasibility of utilising the QZSS system to support emergency warning and response in Australia. The trial has focussed on bushfire and tsunami warnings with an emphasis on the message structure and standards for incorporation on the available signal bandwidth, and the spatial coverage extent of the messages. It also aimed to address the need for a space-based communication capability in Australia, which could potentially facilitate effective emergency warning system unconstrained by the limitations of terrestrial telecommunications.A newly dedicated MobileApp was developed to decode the warning message and visualise relevant information on a map. Two messages for bushfire and tsunami warnings were generated in Australia and sent to the QZSS ground station for satellite transmission. The developed application was tested in Victoria and New South Wales. The trial was successful in the sense that the emergency warning message could be received and decoded using the QZSS enabled receivers and the dedicated MobileApp. The field tests showed that the systems are capable of delivering the required information to users with the required timeliness and completeness. Several technical issues encountered during testing can be primarily attributed to the alpha state of the app, and the specific receiver used for testing. Neither of which are considered to be significant barriers to the on-going development of an operational satellite EWS system.

scholarly journals Key Parameters Estimation and Adaptive Warning Strategy for Rear-End Collision of Vehicle

2015 ◽  
Vol 2015 ◽  
pp. 1-20 ◽  
Author(s):  
Xiang Song ◽  
Xu Li ◽  
Weigong Zhang
Keyword(s):  
Field Tests ◽  
Warning System ◽  
Time Estimation ◽  
Adaptive Strategy ◽  
Parameters Estimation ◽  
Collision Warning ◽  
Variable Threshold ◽  
Luenberger Observer ◽  
Safety Distance ◽  
Driving Conditions

The rear-end collision warning system requires reliable warning decision mechanism to adapt the actual driving situation. To overcome the shortcomings of existing warning methods, an adaptive strategy is proposed to address the practical aspects of the collision warning problem. The proposed strategy is based on the parameter-adaptive and variable-threshold approaches. First, several key parameter estimation algorithms are developed to provide more accurate and reliable information for subsequent warning method. They include a two-stage algorithm which contains a Kalman filter and a Luenberger observer for relative acceleration estimation, a Bayesian theory-based algorithm of estimating the road friction coefficient, and an artificial neural network for estimating the driver’s reaction time. Further, the variable-threshold warning method is designed to achieve the global warning decision. In the method, the safety distance is employed to judge the dangerous state. The calculation method of the safety distance in this paper can be adaptively adjusted according to the different driving conditions of the leading vehicle. Due to the real-time estimation of the key parameters and the adaptive calculation of the warning threshold, the strategy can adapt to various road and driving conditions. Finally, the proposed strategy is evaluated through simulation and field tests. The experimental results validate the feasibility and effectiveness of the proposed strategy.

Disclosing Lawyers: Questioning Law and Process in the Admission of Australian Lawyers

2013 ◽  
Vol 41 (2) ◽  
pp. 227-263 ◽  
Author(s):  
Francesca Bartlett ◽  
Linda Haller
Keyword(s):  
Mental Health ◽  
New South ◽  
Relevant Information ◽  
State Mental Health ◽  
The Public ◽  
Know How ◽  
South Wales ◽  
Personal Morality ◽  
Disclosure Patterns ◽  
State Mental

Australian lawyers are assessed and admitted to practise at a state and territory level. An important part of that assessment is an applicant's ‘suitability’ for professional practise; also referred to as the ‘character test’ of personal morality. This test requires applicants for admission to disclose relevant information about themselves including past conduct and (in at least one state) mental health status. Very little information about the process of admission is available. Around the country, we do not know how the character test is currently administered, how many applicants reveal past conduct, and how many are refused admission. This article focuses on the three largest jurisdictions of New South Wales, Victoria and Queensland. It traces their varying approaches to admission; from legislative provision, court interpretation to administrative approach. It also examines some rare data about disclosure patterns on applying for admission. The resulting analysis raises concerns about a range of matters relating to admission to legal practice in Australia. It is argued that the secrecy of process is unjustified; and there is lack of confidentiality, certainty, and possibly fairness, ensured for applicants, particularly where issues of mental health arise. Finally, it is argued that there is a great difference in law and process between the states considered. While the ostensible goal of protection of the public is the same, the approach is far from that.

New Lane Departure Warning System Based on Side-View Cameras

2015 ◽  
Vol 764-765 ◽  
pp. 1361-1365
Author(s):  
Cheng Yu Chiu ◽  
Chih Han Chang ◽  
Hsin Jung Lin ◽  
Tsong Liang Huang
Keyword(s):  
Warning System ◽  
Side View ◽  
Lane Departure Warning ◽  
Driver Assistance ◽  
Driver Assistance Systems ◽  
Warning Messages ◽  
Warning Message ◽  
Lane Departure ◽  
Assistance Systems ◽  
The Right

This paper addressed a new lane departure warning system (LDWS). We used the side-view cameras to promote Advanced Driver Assistance Systems (ADAS). A left side-view camera detected the right lane next to vehicle, and a right side-view camera detected the right lane. Two cameras processed in their algorithm and gave warning message, independently and separately. Our algorithm combined those warning messages to analyze environment situations. At the end, we used the LUXGEN MPV to test and showed results of verifications and tests.

scholarly journals A Smart IoT Device for Detecting and Responding to Earthquakes

Electronics ◽  
2019 ◽  
Vol 8 (12) ◽  
pp. 1546 ◽  
Author(s):  
Jangsoo Lee ◽  
Irshad Khan ◽  
Seonhwa Choi ◽  
Young-Woo Kwon
Keyword(s):  
Low Cost ◽  
Warning System ◽  
Acceleration Sensor ◽  
Earthquake Early Warning System ◽  
Detection Model ◽  
Earthquake Detection ◽  
Warning Message ◽  
Acceleration Sensors ◽  
Learning Technique ◽  
Noise Data

The advancement of hardware and software technologies makes it possible to use smartphones or Internet of things for monitoring environments in realtime. In recent years, much effort has been made to develop a smartphone based earthquake early warning system, where low-cost acceleration sensors inside a smartphones are used for capturing earthquake signals. However, because a smartphone comes with a powerful CPU, spacious memory, and several sensors, it is waste of such resources to use it only for detecting earthquakes. Furthermore, because a smartphone is mostly in use during the daytime, the acquired data cannot be used for detecting earthquakes due to human activities. Therefore, in this article, we introduce a stand-alone device equipped with a low-cost acceleration sensor and least computing resources to detect earthquakes. To that end, we first select an appropriate acceleration sensor by assessing the performance and accuracy of four different sensors. Then, we design and develop an earthquake alert device. To detect earthquakes, we employ a simple machine learning technique which trains an earthquake detection model with daily motions, noise data recorded in buildings, and earthquakes recorded in the past. Furthermore, we evaluate the four acceleration sensors by recording two realistic earthquakes on a shake-table. In the experiments, the results show that the developed earthquake alert device can successfully detect earthquakes and send a warning message to nearby devices, thereby enabling proactive responses to earthquakes.

scholarly journals Empirical Analysis of Safe Distance Calculation by the Stereoscopic Capturing and Processing of Images Through the Tailigator System

Sensors ◽  
2019 ◽  
Vol 19 (22) ◽  
pp. 5044
Author(s):  
Gerd Christian Krizek ◽  
Rene Hausleitner ◽  
Laura Böhme ◽  
Cristina Olaverri-Monreal
Keyword(s):  
Low Cost ◽  
Field Tests ◽  
Warning System ◽  
Collision Warning ◽  
The Road ◽  
Cost System ◽  
Straight Line ◽  
Real Value ◽  
On The Road ◽  
Forward Collision Warning

Driver disregard for the minimum safety distance increases the probability of rear-end collisions. In order to contribute to active safety on the road, we propose in this work a low-cost Forward Collision Warning system that captures and processes images. Using cameras located in the rear section of a leading vehicle, this system serves the purpose of discouraging tailgating behavior from the vehicle driving behind. We perform in this paper the pertinent field tests to assess system performance, focusing on the calculated distance from the processing of images and the error margins in a straight line, as well as in a curve. Based on the evaluation results, the current version of the Tailigator can be used at speeds up to 50 km per hour without any restrictions. The measurements showed similar characteristics both on the straight line and in the curve. At close distances, between 3 and 5 m, the values deviated from the real value. At average distances, around 10 to 15 m, the Tailigator achieved the best results. From distances higher than 20 m, the deviations increased steadily with the distance. We contribute to the state of the art with an innovative low-cost system to identify tailgating behavior and raise awareness, which works independently of the rear vehicle’s communication capabilities or equipment.

Field tests for evaluating cooperative intersection signal violation warning system (CISVWS)

2013 ◽  
Vol 14 (2) ◽  
pp. 275-281 ◽  
Author(s):  
Y. -K. Park ◽  
Y. -J. Moon ◽  
Y. -S. Cho ◽  
K. -J. Kum
Keyword(s):  
Field Tests ◽  
Warning System

scholarly journals Detection of the 2010 Chilean tsunami using satellite altimetry

2011 ◽  
Vol 11 (9) ◽  
pp. 2391-2406 ◽  
Author(s):  
B. D. Hamlington ◽  
R. R. Leben ◽  
O. A. Godin ◽  
J. F. Legeais ◽  
E. Gica ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Early Warning ◽  
Early Warning System ◽  
Warning System ◽  
Sea Surface Height ◽  
Open Ocean ◽  
Sea Surface ◽  
Sea Surface Roughness ◽  
Spatial Coverage ◽  
Chilean Tsunami

Abstract. Tsunamis are difficult to detect and measure in the open ocean because the wave amplitude is much smaller than it is closer to shore. An effective early warning system, however, must be able to observe an impending tsunami threat far away from the shore in order to provide the necessary lead-time for coastal inhabitants to find safety. Given the expansiveness of the ocean, sensors capable of detecting the tsunami must also have very broad areal coverage. The 2004 Sumatra-Andaman tsunami was definitively detected in the open ocean from both sea surface height and sea surface roughness measurements provided by satellite altimeters. This tsunami, however, was exceptionally strong and questions remain about the ability to use such measurements for the detection of weaker tsunamis. Here we study the 2010 Chilean tsunami and demonstrate the ability to detect the tsunami in the open ocean. Specifically, we analyze the utility of filtering in extracting the tsunami signal from sea surface height measurements, and, through the use of statistical analyses of satellite altimeter observations, we demonstrate that the 2010 Chilean tsunami induced distinct and detectable changes in sea surface roughness. While satellite altimeters do not provide the temporal and spatial coverage necessary to form the basis of an effective early warning system, tsunami-induced changes in sea surface roughness can be detected using orbiting microwave radars and radiometers, which have a broad surface coverage across the satellite ground track.

scholarly journals DESIGN CONCEPTS OF AN ONBOARD EARLY WARNING SYSTEM OF PILOT ABOUT ENTERING WAKE VORTICES FROM ANOTHER AIRCRAFT

2018 ◽  
Vol 21 (4) ◽  
pp. 84-95 ◽  
Author(s):  
I. G. Golovnev ◽  
V. V. Vyshinsky ◽  
A. I. Zhelannikov ◽  
K. V. Lapshin
Keyword(s):  
Early Warning ◽  
Early Warning System ◽  
Warning System ◽  
Satellite System ◽  
Data System ◽  
Wake Vortex ◽  
Main Task ◽  
Software Complex ◽  
Wake Vortices ◽  
Design Concepts

An airborne aircraft forms a wake vortex behind itself dangerous for other entering it aircraft both piloted and unmanned. Wake vortex intensity depends on parameters of the aircraft creating it, so the greater the aircraft mass is, the higher its impact on other aircraft is. It is not possible to register visually the wake vortex, since in fact it is invisible. Introduction of wide-body aircraft like A380 into service leads to the revision of separation rules with the aim to increase admissible distance between aircraft. There is a quite demonstrative case when Challenger 604 got into the wake vortex after A380: though separation rules at the altitude were observed, Challenger performed an out-of-control rotating descent from the altitude of 10000 m to 3000 m. At present, in spite of multi-year research there are no real verified suggestions on wake vortex safety of aircraft flights. The paper presents the methodological basis and design concepts of an onboard early warning system of a pilot about entering wake vortices from another aircraft. The main task of the proposed system is to reveal wake vortices according to pressure decrease in their cores; to do it we perform on-line measuring of pressure in front of an aircraft. Measurements are done by a standard onboard air data system and an onboard inertial satellite system in order to control the consistency of “barometric” altitude readings and those of altitude defined by an inertial satellite system. The value of wake vortices rarefaction measured by an onboard air data system allows estimating the influence degree of wake vortices on the aircraft roll moment with the help of a special hardware and software complex and to determine the necessity to change the flight mode. It is proposed to use a missile bench for the dimensioning wake vortices on aircraft models in order to test computational methods of wake vortices dimensioning

scholarly journals An overview of methodologies for real-time detection, characterisation and tracking of traveling ionospheric disturbances developed in the TechTIDE project

2020 ◽  
Vol 10 ◽  
pp. 42
Author(s):  
Anna Belehaki ◽  
Ioanna Tsagouri ◽  
David Altadill ◽  
Estefania Blanch ◽  
Claudia Borries ◽  
...  
Keyword(s):  
Real Time ◽  
Large Scale ◽  
Tracking System ◽  
Warning System ◽  
Satellite System ◽  
Ionospheric Disturbances ◽  
Time Activity ◽  
Travelling Ionospheric Disturbances ◽  
Additional Information ◽  
Global Navigation Satellite

The main objective of the TechTIDE project (warning and mitigation technologies for travelling ionospheric disturbances effects) is the development of an identification and tracking system for travelling ionospheric disturbances (TIDs) which will issue warnings of electron density perturbations over large world regions. The TechTIDE project has put in operation a real-time warning system that provides the results of complementary TID detection methodologies and many potential drivers to help users assess the risks and develop mitigation techniques tailored to their applications. The TechTIDE methodologies are able to detect in real time activity caused by both large-scale and medium-scale TIDs and characterize background conditions and external drivers, as an additional information required by the users to assess the criticality of the ongoing disturbances in real time. TechTIDE methodologies are based on the exploitation of data collected in real time from Digisondes, Global Navigation Satellite System (GNSS) receivers and Continuous Doppler Sounding System (CDSS) networks. The results are obtained and provided to users in real time. The paper presents the achievements of the project and discusses the challenges faced in the development of the final TechTIDE warning system.

Communication in the High North: Supporting Safe Maritime Operations

2013 ◽  
Author(s):  
Beate Kvamstad
Keyword(s):  
Communication Systems ◽  
Situational Awareness ◽  
Field Tests ◽  
Satellite Communications ◽  
Satellite System ◽  
The Arctic ◽  
Safety Level ◽  
Communication Infrastructure ◽  
Arctic Conditions ◽  
Maritime Operations

The special Arctic conditions with the presence of ice and harsh weather require complex offshore maritime operations compared to more central parts of the world. In order to maintain the safety level of the operations one need to share information amongst numerous actors across large distances. This is especially important in critical situations, when correct decisions need to be made very fast. Having a shared situational awareness becomes crucial. This again requires reliable and robust communication infrastructure such that undisrupted information is received by the end user in time. This represents a major challenge in the Arctic, since communication infrastructure above 75°N is relatively poor. Ships operating in open seas use maritime communication systems based on geostationary (GEO) satellites which orbit the earth above the equatorial line, such as for example Inmarsat and VSAT. However, they have little or no coverage at all in the Arctic and the low elevation angles makes them vulnerable to external influences. The theoretical coverage limit for GEO systems is 81.3°N, but field tests performed in the Norwegian MarSafe North1 project showed that instability and signal dropouts can be experienced already at 70° N during certain conditions. The only satellite system that provides full coverage in the Arctic area is Iridium, and it offers digital capacity through the Iridium OpenPort services. However, users have reported unstable performance, and the field tests showed that Iridium has unstable digital throughput in Arctic areas. The paper will present results from field tests performed in the MarSafe North project. The projects MarCom2, MarSafe North and ArctiCOM3 have investigated the state-of-the-art of Arctic communications; they have investigated future needs for satellite communications and proposed potential solutions. This paper will present the main results from these projects, as well as describing the main activities and tentative results achieved in the on-going project MARENOR, which analyses the factors that influence the quality of service of navigation and communication systems in the Arctic.

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