Alarm systems based on a pair of short-term earthquake precursors

1988 ◽  
Vol 78 (4) ◽  
pp. 1538-1549
Author(s):  
Giuseppe Grandori ◽  
Elisa Guagenti ◽  
Federico Perotti
Keyword(s):  
Statistical Analysis ◽  
Active Region ◽  
Southern California ◽  
Main Shock ◽  
Weak Shock ◽  
Earthquake Precursors ◽  
Alarm System ◽  
Short Term ◽  
Alarm Systems

Abstract A statistical analysis of the foreshock-main shock correlation for a seismically active region in Italy is presented. It is found that the probability that a weak shock be followed within 2 days by a main shock is of the order of 2 per cent, while the probability that a main shock be preceded by a foreshock is of the order of 50 per cent. These results are quite similar to those found by L. Jones (1985) for southern California. The effectiveness of alarm systems based on a pair of short-term earthquake precursors is then analyzed. In particular, the analysis shows under what conditions the precursor, consisting of potential foreshocks, could be combined with another precursor to provide a reasonably effective alarm system.

scholarly journals The Effect of Remittances on Poverty in the Emerging Countries of the European Union

2019 ◽  
Vol 11 (12) ◽  
pp. 3265 ◽  
Author(s):  
Anca Mehedintu ◽  
Georgeta Soava ◽  
Mihaela Sterpu
Keyword(s):  
European Union ◽  
Statistical Analysis ◽  
Economic Crisis ◽  
Regression Models ◽  
Emerging Countries ◽  
Time Dependent ◽  
The European Union ◽  
Short Term ◽  
Growth Trend ◽  
Poverty Threshold

In this paper we study the evolution of remittances and risk of poverty threshold for nine emerging countries in the European Union and analyzed the evolution and trend of the share of remittances in the risk of poverty threshold. The analysis was performed on data taken from the Eurostat database for the period 2005–2017. The statistical analysis of the data showed that the evolution of both remittances and risk of poverty threshold was heavily influenced by the global economic crisis. Although after the crisis, the risk of poverty threshold has seen a growing trend in all emerging countries, the remittances have experienced sinuous variations, dramatic declines for some of the countries (drastically for Romania and Latvia) and significant increases for others (Hungary). The results of the analysis using time-dependent regression models lead to the conclusion that, although the share of remittances in risk of poverty threshold diminished abruptly after the 2009 economic crisis, in the short term it is expected to maintain a growth trend for most of the analyzed countries (Bulgaria, Czechia, Hungary, Lithuania, Poland, Romania, and Slovakia), followed downward tendency after 2018 for Bulgaria and Romania, and after 2020 for Hungary and Lithuania. For Latvia and Estonia, both quadratic and cubic models estimate a decreasing evolution.

scholarly journals POSSIBILITY OF TRANSMITTING ALARM MESSAGES OVER THE RADIO NETWORK TO THE MONITORING AND ALARM RECEIVING CENTRE

2018 ◽  
Vol 6 ◽  
pp. 1013-1016
Author(s):  
Martin Boroš ◽  
Martin Halaj ◽  
Andrej Veľas
Keyword(s):  
Alarm System ◽  
Radio Network ◽  
Security Systems ◽  
Alarm Signal ◽  
Human Needs ◽  
Alarm Systems ◽  
Basic Human Needs ◽  
Modern Technologies

Security has been and will probably be one of the basic human needs that we work on every day. Some of the popular options nowadays is the use of modern technologies in security, which is increasingly popular with alarm systems. Mostly alarm systems are electrical security systems, which in many cases can be supplemented by various additional functions according to the owner's requirements. More often, they are also able to connect a secured object to a centralized protection center so that the owner has the possibility of verifying a declared alarm signal through the intervention of the alarm system company operator.This article is aimed at transmitting the indicated alarm signal over a radio network to the centralized protection desk located in the monitoring and alarm receiving center with identification of the most appropriate option.

scholarly journals Multi-centre, randomised non-inferiority trial of early treatment versus expectant management of patent ductus arteriosus in preterm infants (the BeNeDuctus trial): statistical analysis plan

Trials ◽  
2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Tim Hundscheid ◽  
Rogier Donders ◽  
Wes Onland ◽  
Elisabeth M. W. Kooi ◽  
Daniel C. Vijlbrief ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Patent Ductus Arteriosus ◽  
Preterm Infants ◽  
Pharmacological Treatment ◽  
Ductus Arteriosus ◽  
Expectant Management ◽  
The United States ◽  
Statistical Analysis Plan ◽  
Short Term ◽  
Patent Ductus

Abstract Background Controversy exists about the optimal management of a patent ductus arteriosus (PDA) in preterm infants. A persistent PDA is associated with neonatal mortality and morbidity, but causality remains unproven. Although both pharmacological and/or surgical treatment are effective in PDA closure, this has not resulted in an improved neonatal outcome. In most preterm infants, a PDA will eventually close spontaneously, hence PDA treatment potentially increases the risk of iatrogenic adverse effects. Therefore, expectant management is gaining interest, even in the absence of convincing evidence to support this strategy. Methods/design The BeNeDuctus trial is a multicentre, randomised, non-inferiority trial assessing early pharmacological treatment (24–72 h postnatal age) with ibuprofen versus expectant management of PDA in preterm infants in Europe. Preterm infants with a gestational age of less than 28 weeks and an echocardiographic-confirmed PDA with a transductal diameter of > 1.5 mm are randomly allocated to early pharmacological treatment with ibuprofen or expectant management after parental informed consent. The primary outcome measure is the composite outcome of mortality, and/or necrotizing enterocolitis Bell stage ≥ IIa, and/or bronchopulmonary dysplasia, all established at a postmenstrual age of 36 weeks. Secondary short-term outcomes are comorbidity and adverse events assessed during hospitalization and long-term neurodevelopmental outcome assessed at a corrected age of 2 years. This statistical analysis plan focusses on the short-term outcome and is written and submitted without knowledge of the data. Trial registration ClinicalTrials.gov NTR5479. Registered on October 19, 2015, with the Dutch Trial Registry, sponsored by the United States National Library of Medicine Clinicaltrials.gov NCT02884219 (registered May 2016) and the European Clinical Trials Database EudraCT 2017-001376-28.

Design of the Digital System about the Fire Safety for Urban Architecture Based on Network

2012 ◽  
Vol 241-244 ◽  
pp. 2606-2610
Author(s):  
Zhong Jiang ◽  
Jin Jiang
Keyword(s):  
Long Range ◽  
Fire Safety ◽  
Data Center ◽  
Alarm System ◽  
Urban Architecture ◽  
Fire Alarm ◽  
Interface Module ◽  
Alarm Systems ◽  
The City ◽  
Fire Information

At present, the automatic fire alarm systems on sale were produced by different factories, which resulted in the information not being shared mutually. Furthermore, it was difficult to connect the different fire auto-alarm systems to the same network. They couldn't communicate automatically with the city fire-fight commanding center in time. We designed interface module of automatic fire alarm controller network and interface module of data center network. By using the existing net of PSTN and internet, it could transmit the breakdown information and a fire information of the automatic fire alarm systems to the fire-fight commanding center, the long-range diagnose, the real-time monitor of a fire and the long-range control in the city fire auto-alarm system was realized.

Solar Radio Emission as a Prediction Technique for Coronal Mass Ejections’ Detection

2017 ◽  
Vol 13 (S335) ◽  
pp. 321-323
Author(s):  
Vladimir M. Fridman ◽  
Olga A. Sheiner
Keyword(s):  
Statistical Analysis ◽  
Radio Emission ◽  
Coronal Mass Ejections ◽  
Solar Radio ◽  
Solar Radio Emission ◽  
Short Term ◽  
Prediction Technique ◽  
Solar Coronal

AbstractIn this report we present a possible scheme of short-term CME detection forecasting developed on the basis of statistical analysis of solar radio emission regularities prior to “isolated” solar Coronal Mass Ejections registered in 1998, 2003, 2009-2013.

Analysis of Reliability Requirements for Fire Alarm Systems Operated in Civil Structures and Critical Infrastructure Facilities

2020 ◽  
Vol 69 (3) ◽  
pp. 77-87
Author(s):  
Krzysztof Jakubowski
Keyword(s):  
System Reliability ◽  
Critical Infrastructure ◽  
Alarm System ◽  
Civil Structures ◽  
Fire Hazards ◽  
Fire Alarm ◽  
Alarm Systems ◽  
Fire Alarm System

A fire alarm system (FAS) is one of the most important safety facilities used in any building, and include CCTV and intrusion and panic alarms. Pursuant to the Polish Regulation of the Minister of the Interior and Administration of 07/06/2010, FASs are required in specific civil structures. FASs are directly responsible for the protection of the life and health of humans and animals, and indi-rectly for property at the protected sites. In considering the fire hazards and scenarios, a FAS should be characterized with sufficient reliability. Every FAS is subject to specific requirements in terms of reliability and continuity of performance at the stages of monitoring, FAS failure, and fire. This work is an analysis of the reliability requirements for FAS. Keywords: fire alarm system, reliability requirements, structures.

Statistical Monitoring and Early Forecasting of the Earthquake Sequence: Case Studies after the 2019 M 6.4 Searles Valley Earthquake, California

2020 ◽  
Vol 110 (4) ◽  
pp. 1781-1798 ◽  
Author(s):  
Yosihiko Ogata ◽  
Takahiro Omi
Keyword(s):  
Real Time ◽  
Case Studies ◽  
Seismic Activity ◽  
Southern California ◽  
Aftershock Sequence ◽  
Earthquake Sequence ◽  
Short Term ◽  
Probability Forecast ◽  
Background Rate ◽  
High Background

ABSTRACT This study considers the possible implementation of the operational short-term forecasting, and analysis of earthquake occurrences using a real-time hypocenter catalog of ongoing seismic activity, by reviewing case studies of the aftershocks of the Mw 6.4 Searles Valley earthquake that occurred before the Mw 7.1 Ridgecrest earthquake. First, the short-term prediction of spatiotemporal activity is required in real time along with the background seismic activity over a wide region to obtain practical probabilities of large earthquakes; snapshots from the continuous forecasts during the Searles Valley and Ridgecrest earthquake sequence are included to monitor the growth and migration of seismic activity over time. We found that the area in and around the rupture zone in southern California had a very high background rate. Second, we need to evaluate whether a first strong earthquake may be the foreshock for a further large earthquake; the rupture region in southern California had one of the highest such probabilities. Third, short-term probability forecast of early aftershocks are much desired despite the difficulties with data acquisition. The aftershock sequence of the Mw 6.4 Searles Valley event was found to significantly increase the probability of a larger earthquake, as seen in the foreshock sequence of the 2016 MJMA 7.4 Kumamoto, Japan, earthquake. Finally, detrending the temporal activity of all the aftershocks by stretching and shrinking the ordinary time scale according to the rate given by the Omori–Utsu formula or the epidemic-type aftershock sequence model, we observe the spatiotemporal occurrences in which seismicity patterns may be abnormal, such as relative quiescence, relative activation, or migrating activity. Such anomalies should be recorded and listed for the future evaluation of the probability of a possible precursor for a large aftershock or a new rupture nearby. An example of such anomalies in the aftershocks before the Mw 7.1 Ridgecrest earthquake is considered.

scholarly journals Transient electromagnetic radiation of the lithosphere in a seismically active region

2019 ◽  
Vol 127 ◽  
pp. 03006
Author(s):  
Yiyang Luo ◽  
Nguyen Xuan An ◽  
Vladislav Lutsenko ◽  
Vladimir Uvarov
Keyword(s):  
Electromagnetic Field ◽  
Active Region ◽  
Electromagnetic Radiation ◽  
Seismic Waves ◽  
Earth’S Crust ◽  
Schumann Resonance ◽  
Short Term ◽  
Transient Electromagnetic ◽  
Earth's Crust ◽  
High Level

To study the electromagnetic radiation of the lithosphere associated with seismic waves, we used the recordings of the natural electromagnetic radiation obtained under conditions of weak industrial noise and a high level of microseismicity in the ELF-VLF wave bands. It is shown that these data contain information about the surface waves of the Earth’s crust and are accompanied by a frequency close to the first harmonic of the Schumann resonance. The distribution of spikes over thresholds is obtained, which can be indicators of the activity in the processes of the Earth’s crust. The averaged form of the spikes for different components of the electromagnetic field is obtained. Attention is drawn to the differences in the various components of the electromagnetic field and their diurnal differences are analyzed. The possibility of using the approach to predict the short-term movement of the Earth’s crust is considered.

Effects of Aging on the Physical and Rheological Properties of Asphalt Binder Incorporating Rediset®

2014 ◽  
Vol 70 (7) ◽  
Author(s):  
Mohamad Yusri Aman ◽  
Zulkurnain Shahadan ◽  
Munzilah Md. Ruhani ◽  
Rosnawati Buhari
Keyword(s):  
Statistical Analysis ◽  
Rheological Properties ◽  
Asphalt Binder ◽  
Dynamic Shear ◽  
Short Term ◽  
Rotational Viscometer ◽  
Aging Index ◽  
Modified Binders ◽  
Before And After ◽  
Effects Of Aging

This paper focuses on physical and rheological properties of virgin asphalt binder blended with different percentage of Rediset® content. The rheological properties of the Rediset® modified binders were characterized before and after being subjected to short-term aging using rotational viscometer (RV) and dynamic shear rheometer (DSR) according to SuperpaveTM test protocols. The results indicated that the penetration and softening point were consistently decreased and increased, respectively for unaged and short-term aged samples. The penetration index (PI) and viscosity aging index (VAI) were increased as the Rediset® modified binders aged and showed a high significance correlation. The addition of Rediset® in asphalt binder exhibited change in binder rheology after subjected to short-term aged which influenced the rutting parameter. A statistical analysis showed that Rediset® used as warm asphalt additive had significantly increased the G*/Sin δ parameter which indicated greater resistance to rutting.

Sign in / Sign up

Export Citation Format

Share Document