Wyniki wyszukiwania - BazTech

1

Simulation and Performance Analysis of Network Backup Systems Using Hot Standby Router Protocol (HSRP) Method on Real-Time Networks

Simanjuntak Imelda Uli Vistalina, Haidi Junas, Heryanto Humanis, Silalahi Lukman Medriavin

International Journal of Electronics and Telecommunications

|

2023

|

Vol. 69, No. 4

764--768

EN

The phenomenon that occurs today is an increase in the use of electrical energy consumption every year and especially in Public Street Lighting (PSL) lamps. It can be noticed that almost every road is public, and the expressway has PSL lights. PSL lamps are installed on each median, left or right of the road with a distance between ± lights of 30meters. The object of research on this foreign cooperation is located in the PIK2 project located in the Dadap area, Indonesia. The PSL lamp installation location has a road length of ±1.8Km. PSL lamps used have a power of 250watts. While the specific purpose of this study is to design and analyze measurements of power, voltage and current in PSL lamps and also to control and monitor the condition of PSL lamps through the Wireless Sensor Network (WSN) by applying a star topology for the efficiency of electrical energy consumption in PSL lamps, using microcontrollers, sensors, and LoRa. This research is expected to produce a best practice model for the application of WSN in the PSL system in Indonesia and become a recommendation for companies in improving WSN technology and global competitiveness. The proposed research methods are quantitative and objective, so this study is applied to acquire and distribute data at PSL light points. The data on the sensor will be sent through the end node which is then sent to the coordinator node or gateway. The sensor data on this tool can be displayed by accessing the ubidots.

2

Testing the performance of earthquake early warning system in northern India

Mittal Himanshu, Wu Yih‑Min, Sharma Mukat Lal, Ming Yang Benjamin, Gupta Sushil

Acta Geophysica

|

2019

|

Vol. 67, no. 1

59--75

EN

The main goal of present study is to test the functionality of an earthquake early warning (EEW) system (a life-saving tool), in India using synthesized data and recorded earthquake data from Taiwan. In recent time, India set up an EEW system in the central seismic gap along the Himalayan Belt, consisting of about 100 low-cost P-Alert instruments. The area, where these instruments are installed, is highly sensitive to the seismic risk with the potential of strong, major and great earthquakes. In the absence of recorded data from the Himalayas required for analysis of such system, we take advantage of recorded waveforms from Taiwan, to test the EEW system. We selected Taiwanese stations in good accordance with the Indian sensor network, to have a best fit in terms of inter station spacing. Finally, the recorded waveforms are passed through Earthworm software using tankplayer module. The system performs very well in terms of earthquake detection, P-wave picking, earthquake magnitude and location (using previously estimated regressions). Pd algorithm has been tested where the peak amplitude of vertical displacement is used for estimating magnitudes using previously regressed empirical relationship data. For the earthquakes located between Main Boundary Thrust and Main Central Thrust along with a matching instrumentation window, a good estimate of location, as well as magnitude is observed. The approach based on Pd for estimating magnitude works perfectly as compared to _ c approach, which is more sensitive to signal-to-noise ratio. To make it more region specific, we generated synthetic seismograms from the epicenters of historical Chamoli (1999) and Uttarkashi (1991) earthquakes at EEW stations in India and checked the functionality of EEW. While placing these earthquakes within the instrumentation window, a good approximation of earthquake location and magnitude is obtained by passing these generated waveforms. The parameters used to judge the performance of EEW system included the time taken by the system in issuing warning after the confirmation of the occurrence of damaging earthquake and the lead time (time interval between the issuing of warning and arrival of damaging earthquake ground motion at a particular location). High lead times have been obtained for the plainer regions including thickly populated regions of Gangetic plains, such as Delhi National Capital Region according to the distance from the epicenter, which are the main target of EEW system.

3

New macroseismic intensity predictive models for Turkey

Bayrak Erdem, Nas Murat, Bayrak Yusuf

Acta Geophysica

|

2019

|

Vol. 67, no. 6

1483--1513

EN

In this study, we propose new attenuation relations for use in possible future macroseismicity-based analyses for Turkey. The most significant difference of the new relationships is that they are specifically designed for use in the full extent of Turkey. Besides, this paper supplies an extensive macroseismic database larger than ever collected for Turkey. To this end, a modifiable MATLAB program, which is fully presented in the electronic supplement to this paper, was written to analyze the collected isoseismal maps that were first geo-rectified and then gridded by dividing them into 0.02° arrays. The epicentral distances belonging to each point intersected with the pertinent isoseism were compiled in an event-based log. Then, all subsets were merged into a single dataset, which is presented in the electronic supplement. Required strong ground motion parameters were taken from an improved earthquake catalog recently given by Kadirioğlu et al. (B Earthq Eng 1:2, 2016). For modeling the relations, the early relations were mostly selected as patterns for our candidate attenuation models. Of all candidate models, the statistically significant ones were individually tested whether or not they were able to detect the best fitting model to our database. The predicted error margins of the proposed models were compared to those of early models using data-driven statistical tests. In conclusion, considering the usability limits, the estimation capabilities of proposed relationships were found to be useful to some extent than those of the early models developed for Turkey.

4

New magnitude scaling relations for earthquake early warning in the Alborz region, Iran

Sasani M., Ghayamghamian M. R., Ansari A.

Acta Geophysica

|

2018

|

Vol. 66, no. 6

1375--1382

EN

Rapid magnitude estimation relations for earthquake early warning systems in the Alborz region have been developed based on the initial first seconds of the P-wave arrival. For this purpose, a total of 717 accelerograms recorded by the Building and Housing Research Center in the Alborz region with the magnitude (Mw) range of 4.8–6.5 in the period between 1995 and 2013 were employed. Average ground motion period ( c ) and peak displacement ( P d ) in different time windows from the P-wave arrival were calculated, and their relation with magnitude was examined. Four earthquakes that were excluded from the analysis process were used to validate the results, and the estimated magnitudes were found to be in good agreement with the observed ones. The results show that using the proposed relations for the Alborz region, earthquake magnitude could be estimated with acceptable accuracy even after 1 s of the P-wave arrival.

5

Parameters of Higuchi's method to characterize primary waves in some seismograms from the Mexican subduction zone

Galvez-Coyt G., Munoz-Diosdado A., Peralta J., Balderas-Lopez J., Angulo-Brown F.

Acta Geophysica

|

2012

|

Vol. 60, no. 3

910-927

EN

Higuchi's method is a procedure that, if applied appropriately, can determine in a reliable way the fractal dimension D of time series; this fractal dimension permits to characterize the degree of correlation of the series. However, when analyzing some time series with Higuchi's method, there are oscillations at the right-hand side of the graph, which can cause a mistaken determination of the fractal dimension. In this work, an appropriate explanation is given to this type of behaviour. Using the seismogram as a time series and the properties of the P and S waves, it is possible to use the properties of Higuchi's method to previously detect the arrival of the earthquake shacking stage, some seconds in advance, approximately 30-35 s in the case of Mexico City. Thus, we propose the Higuchi's method to characterize and detect the P waves in order to estimate the strength of the forthcoming S waves.