Detection of seismograph signal using fiber bundle sensor

Yasin, Moh.; Apsari, Retna; Ningsih, Kristia; Yhuwana, Y. G. Y.; Zulkarnaen, M.; Djamal, Mitra; Meilano, Irwan; Evita, Maria; Aminah, Nina Siti; Srigutomo, Wahyu; Setiawan, Arı; Darmawan, Herlan; Suyanto, Imam; Wahyudi, Wahyudi; Suryanto, Wiwit; Putra, Heriansyah; Irzaman, Irzaman; Perdinan,; Harun, Sulaiman Wadi

doi:10.1016/j.ijleo.2020.164554

Cited by 7 publications

(3 citation statements)

References 14 publications

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“…A relevant example is in shallow water; tidal conditions affect the spread and level of sound. This is because the depth of the water limits the propagation of low-frequency sound [20,21].…”

Section: Sound Propagation Effect On the Fish Population Of Siganus Spmentioning

confidence: 99%

Study of underwater sound effects relation to current velocity and Siganus sp. population in seaweed cultivation area

Kasim,

Musaruddin,

Mansur

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Underwater sound is one of the interesting phenomena in the ocean. Underwater sounds can impact marine organisms, especially fish and mammals. One of the organisms that can be influenced by underwater sound is the Siganus fish. This study aims to determine sound propagation with a certain level of fish pest repellents about the surface currents velocity and Siganus canaliculatus. population in seaweed cultivation areas. This research was conducted in a seaweed cultivation area in Baubau City, Southeast Sulawesi, Indonesia, in May-July 2022. The tool used is a seaweed pest repellent Ver.04 (Usirikan Ver 03). Underwater sound, at a strength level of 76.19-83.09 dB, can propagate quickly at 60 m in diameter of the sea area. The farthest distance multiplied at a strength of 62.41-69.30 dB can reach 150 m in diameter of the sea area. The fish population (S. canaliculatus) was not found in the seaweed cultivation area, with a sound level of 62.41 dB. The population of Siganus fish is around 2-4 ind/m2 at a sound level of 48.62 dB. Underwater sound with a sound level above 50 dB can impact the population of S. canaliculatus. Seaweed fish repellent can significantly affect behavior. of S. canaliculatus

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Section: Sound Propagation Effect On the Fish Population Of Siganus Spmentioning

confidence: 99%

Study of underwater sound effects relation to current velocity and Siganus sp. population in seaweed cultivation area

Kasim,

Musaruddin,

Mansur

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…In order to monitor seismicity with high accuracy as well as to understand in detail the crustal processes, 1,2 seismological networks with a few kilometers interstation distance are required. [3][4][5][6] The need to upgrade and enrich any available seismic instrumentation is an ongoing process and many approaches have been introduced in recent years. 7,8 Due to the high cost of the deployed instrumentation, this aforementioned interstation distance has only been possible, up to now, for specific research projects 9,10 that involved dense instrumentation using portable equipment for a short period of time.…”

Section: Introductionmentioning

confidence: 99%

Data-driven performance evaluation of a low-cost seismograph

Krokidis

Vlachos

Avlonitis

et al. 2022

Measurement and Control

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The design and implementation of a performance protocol for local seismicity monitoring, is presented. A low-cost seismograph was installed in an area of high seismic activity in Evgiros, Lefkada Island, Greece, collocated with a high resolution 24-bit digitizer equipped with a broadband seismometer. A testing list of 28 local events with different epicenters and magnitudes has been compiled while acquisition data from the conventional seismograph and the proposed one were analyzed. Stochastic data analysis was used to compare these recordings on the same test site with different logging devices. The obtained results showed a satisfactory outcome in the performance of the proposed low-cost seismograph. Even though noise was present, P and S waves were clearly recorded with distinct amplitudes and therefore this arrival time difference, when compared with the one originating from the conventional seismograph, was found to be insignificant. Moreover, through a known magnitude equation, it manages to calculate earthquake’s local magnitude with a deviation of ± 0.4, a result that can be further improved. Lastly, spectral content analysis revealed almost identical waveforms with equivalent relative frequency distributions between the devices being compared.

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“…With the continuous progress in high-end manufacturing, precision measurement technology [1] as well as metamaterials [2][3][4] are being developed more and more rapidly. At present, the commonly used ultra-precision measurement methods include scanning tunneling microscope (STM) [5][6][7], optical fiber displacement sensor [8,9], laser interferometer method [10][11][12][13][14] and grating measurement method [15][16][17][18]. Among them, the laser interferometer method uses the laser wavelength as the measurement standard, which is greatly affected by the humidity, temperature and air pressure changes in the use environment [19].…”

Section: Introductionmentioning

confidence: 99%

Polarization-insensitive high-efficiency two-dimensional metal-dielectric grating by nanodisks arrays

Huang¹,

Wang²

2021

Phys. Scr.

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In this paper, a two-dimensional (2D) reflective grating with nanodisks arrays (NDA) is described, which is capable of achieving high-efficiency and polarization-insensitive output of (−1, 0) order. The proposed grating has been optimized by the finite element method (FEM) at a central wavelength of 780 nm under Littrow mounting, where the grating achieves diffraction efficiencies of 98.01% and 97.54% at the (−1, 0) order for transverse electric (TE) and transverse magnetic (TM) polarizations, respectively. In addition, the extinction ratios of TE and TM polarizations are 33.01 dB and 35.74 dB, respectively. The electric field distribution, wavelength bandwidth, angular bandwidth and fabrication tolerance of the 2D grating are analyzed in detail. The analysis shows that the proposed grating offers a significant improvement in wavelength (bandwidth of 14 nm) and angular (bandwidth of 6.4°) bandwidths compared to previously reported 2D gratings. At the same time, the tolerance analyses demonstrate the feasibility and advantages of NDA grating in practical manufacturing processes. The results are very helpful in understanding and designing 2D gratings, and the proposed grating has great application potential in 2D grating measurement system (GMS).

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Detection of seismograph signal using fiber bundle sensor

Cited by 7 publications

References 14 publications

Study of underwater sound effects relation to current velocity and Siganus sp. population in seaweed cultivation area

Study of underwater sound effects relation to current velocity and Siganus sp. population in seaweed cultivation area

Data-driven performance evaluation of a low-cost seismograph

Polarization-insensitive high-efficiency two-dimensional metal-dielectric grating by nanodisks arrays

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