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Journal articles on the topic 'Ground Recording'

Author: Grafiati

Published: 4 June 2021

Last updated: 16 February 2022

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1

Cranswick, E., B. Gardner, S. Hammond, and R. Banfill. "Recording ground motions where people live." Eos, Transactions American Geophysical Union 74, no. 21 (1993): 243–44. http://dx.doi.org/10.1029/93eo00393.

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2

Pavlis, Gary L., and Frank L. Vernon. "Calibration of seismometers using ground noise." Bulletin of the Seismological Society of America 84, no. 4 (1994): 1243–55. http://dx.doi.org/10.1785/bssa0840041243.

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Abstract We have developed and tested a new technique for calibration of seismometers using continuous recordings of ground noise. The method is founded on analytic techniques recently developed for estimation of transfer functions in magnetotellurics. We find that the technique can produce precise, absolute calibration measurements on sensors that do not have calibration coils. The data used are obtained by placing two sets of sensors close enough together that we can assume they record the same ground motion. It is further assumed that one of the sensors has a known, absolute calibration. On

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3

Drever, John L., Aysegul Yildirim, and Mattia Cobianchi. "London Street Noises: A Ground-Breaking Field Recording Campaign from 1928." Acoustics 3, no. 1 (2021): 118–36. http://dx.doi.org/10.3390/acoustics3010010.

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In a leading article by Sir Percival Philips in the UK popular newspaper, the Daily Mail, July 16, 1928, came the following headlines: “Millions Lost by Noise – Cities’ Worst Plague – Menace to Nerves and Health – What is Being Done to Stop it”. The article was supported by research from Prof Henry J. Spooner, who had been researching and campaigning on the ill-effects of noise and its economic impact. The article sparked subsequent discussion and follow-up articles in the Daily Mail and its international partners. In an era of rapid technological change, that was on the cusp of implementing s

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4

Barak, Ohad, Kerry Key, Steven Constable, and Shuki Ronen. "Recording active-seismic ground rotations using induction-coil magnetometers." GEOPHYSICS 83, no. 5 (2018): P19—P42. http://dx.doi.org/10.1190/geo2017-0281.1.

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Most of the current rotational sensing technology is not geared toward the recording of seismic rotations’ amplitudes and frequencies. There are few instruments that are designed for rotational seismology, and the technology for building them is currently being developed. There are no mass industrial producers of seismic rotation sensors as there are for geophones, and only one current sensor model can be deployed on the ocean bottom. We reviewed some current rotational-seismic acquisition technologies, and developed a new method of recording rotations using an existing, robust and field-deplo

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Margaris, Basil, Emmanuel M. Scordilis, Jonathan P. Stewart, et al. "Hellenic Strong-Motion Database with Uniformly Assigned Source and Site Metadata for the Period 1972–2015." Seismological Research Letters 92, no. 3 (2021): 2065–80. http://dx.doi.org/10.1785/0220190337.

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Abstract We present a Hellenic database of intensity measures from uniformly processed strong ground motion recordings, together with metadata on earthquake source attributes and recording site conditions. The database consists of information from 471 earthquakes between 1973 and 2015 that produced 2993 usable recordings from 333 sites. A key element of this work is a unified presentation of data from two major data providers that operate in Greece (Institute of Engineering Seismology and Earthquake Engineering and the Institute of Geodynamics, National Observatory of Athens) along with a univ

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Tape, Carl, Adam T. Ringler, and Don L. Hampton. "Recording the Aurora at Seismometers across Alaska." Seismological Research Letters 91, no. 6 (2020): 3039–53. http://dx.doi.org/10.1785/0220200161.

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Abstract We examine three continuously recording data sets related to the aurora: all-sky camera images, three-component magnetometer data, and vertical-component, broadband seismic data as part of the EarthScope project (2014 to present). Across Alaska there are six all-sky cameras, 13 magnetometers, and &gt;200 seismometers. The all-sky images and magnetometers have the same objective, which is to monitor space weather and improve our understanding of auroral activity, including the influence on magnetic fields in the ground. These variations in the magnetic field are also visible on sei

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Kostinakis, K. G., A. M. Athanatopoulou, and I. E. Avramidis. "Orientation effects of horizontal seismic components on longitudinal reinforcement in R/C frame elements." Natural Hazards and Earth System Sciences 12, no. 1 (2012): 1–10. http://dx.doi.org/10.5194/nhess-12-1-2012.

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Abstract. The present paper investigates the influence of the orientation of recorded horizontal ground motion components on the longitudinal reinforcement of R/C frame elements within the context of linear response history analysis. For this purpose, three single-story buildings are analyzed and designed for 13 recorded bi-directional ground motions applied along the horizontal structural axes. The analysis and design is performed for several orientations of the recording angle of the horizontal seismic components. For each orientation the longitudinal reinforcement at all critical cross sect

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8

Landrum, Ralph A., Robert A. Brook, and John J. Sallas. "Polarity convention for vibratory source/recording systems." GEOPHYSICS 59, no. 2 (1994): 315. http://dx.doi.org/10.1190/1.1443594.

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This report extends the 1975 SEG Technical Standards Committee Recommendations for source/recorder system polarity to include P‐wave vibrators which are phase‐locked to the estimated ground force (weighted‐sum) or reaction mass signals, and to include horizontally polarized (S‐wave) vibrators, none of which were prevalent at the time of that first report.

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Schmeissner, C. M., K. T. Spikes, and D. W. Steeples. "Recording seismic reflections using rigidly interconnected geophones." GEOPHYSICS 66, no. 6 (2001): 1838–42. http://dx.doi.org/10.1190/1.1487126.

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Ultrashallow seismic reflection surveys require dense spatial sampling during data acquisition, which increases their cost. In previous efforts to find ways to reduce these costs, we connected geophones rigidly to pieces of channel iron attached to a farm implement. This method allowed us to plant the geophones in the ground quickly and automatically. The rigidly interconnected geophones used in these earlier studies detected first‐arrival energy along with minor interfering seismic modes, but they did not detect seismic reflections. To examine further the feasibility of developing rigid geoph

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10

Noorlandt, Rik, Pauline P. Kruiver, Marco P. E. de Kleine, et al. "Characterisation of ground motion recording stations in the Groningen gas field." Journal of Seismology 22, no. 3 (2018): 605–23. http://dx.doi.org/10.1007/s10950-017-9725-6.

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11

Buccino, Alessio Paolo, and Gaute Tomas Einevoll. "MEArec: A Fast and Customizable Testbench Simulator for Ground-truth Extracellular Spiking Activity." Neuroinformatics 19, no. 1 (2020): 185–204. http://dx.doi.org/10.1007/s12021-020-09467-7.

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AbstractWhen recording neural activity from extracellular electrodes, both in vivo and in vitro, spike sorting is a required and very important processing step that allows for identification of single neurons’ activity. Spike sorting is a complex algorithmic procedure, and in recent years many groups have attempted to tackle this problem, resulting in numerous methods and software packages. However, validation of spike sorting techniques is complicated. It is an inherently unsupervised problem and it is hard to find universal metrics to evaluate performance. Simultaneous recordings that combin

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12

Goulet, Christine A., Tadahiro Kishida, Timothy D. Ancheta, et al. "PEER NGA-East database." Earthquake Spectra 37, no. 1_suppl (2021): 1331–53. http://dx.doi.org/10.1177/87552930211015695.

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This article documents the earthquake ground motion database developed for the NGA-East Project, initiated as part of the Next Generation Attenuation (NGA) research program and led by the Pacific Earthquake Engineering Research Center (PEER). The project was focused on developing a ground motion characterization model (GMC) model for horizontal ground motions for the large region referred to as Central and Eastern North America (CENA). The CENA region covers most of the U.S. and Canada, from the Rocky Mountains to the Atlantic Ocean and is characterized tectonically as a stable continental reg

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Zimmaro, Paolo, Giuseppe Scasserra, Jonathan P. Stewart, et al. "Strong Ground Motion Characteristics from 2016 Central Italy Earthquake Sequence." Earthquake Spectra 34, no. 4 (2018): 1611–37. http://dx.doi.org/10.1193/091817eqs184m.

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The Central Italy earthquake sequence has, to date, generated three mainshocks: M6.1 24 August, M5.9 26 October, and M6.5 30 October 2016. These events, along with aftershocks, were well recorded by Italian networks, and are among the normal fault earthquakes with the highest number of recordings globally. We process records for six events using procedures developed during the latest Next Generation Attenuation (NGA-West2) project, coordinated by the Pacific Earthquake Engineering Research Center (PEER). Many recording sites lacked V S30 assignments, which we provide using measured shear wave

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Kagami, Hiroshi, Shigeyuki Okada, Keishi Shiono, Mete Oner, Marijan Dravinski, and Ajit K. Mal. "Observation of 1- to 5-second microtremors and their application to earthquake engineering. Part III. A two-dimensional study of site effects in the San Fernando Valley." Bulletin of the Seismological Society of America 76, no. 6 (1986): 1801–12. http://dx.doi.org/10.1785/bssa0760061801.

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Abstract A two-dimensional study of the influence of deep sediment on seismic ground motions was conducted by recording and analyzing long-period microtremors in the San Fernando Valley, California. The recordings were made at 50 regularly distributed sites in the valley. Three reference sites were employed at the baserock outcrop around the valley so as to observe the time-dependent characteristics of the microtremors. Amplitudes in a period range of several seconds correlate with the thicknesses of the sedimentary layers. A site amplification effect, which was evaluated in terms of sediment-

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15

Masters, Peter. "From training ground to battlefield: Recording the archaeology of the Great War." ArchéoSciences, no. 33 (suppl.) (October 30, 2009): 109–10. http://dx.doi.org/10.4000/archeosciences.1379.

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16

Sharp, Michael K., and Donald E. Yule. "Ground Motion and Air Overpressure Study." Shock and Vibration 5, no. 3 (1998): 159–70. http://dx.doi.org/10.1155/1998/869376.

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A seismic attenuation and air overpressure study was conducted to determine the attenuation of explosion induced ground motions and air overpressures as a function of distance from shallow subsurface detonated charges, and to derive parameters to predict blast effects at distances beyond the ordinance disposal facility boundary. A total of 210 explosive shots were monitored producing 2048 time histories of ground motions recorded in the vertical, radial, and transverse directions, in addition to recording air overpressures. The data were analyzed for peak particle velocities and peak air overp

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17

Davis, Thomas L. "Multicomponent seismology—The next wave." GEOPHYSICS 66, no. 1 (2001): 49. http://dx.doi.org/10.1190/1.1444920.

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Multicomponent seismology requires recording of seismic data with three‐ and sometimes four‐component receivers. The three components measure displacement of the ground, usually in two horizontal and one vertical directions. The fourth component is a measurement of pressure, which is used in sea‐bottom surveys. Measuring three components of ground displacement enables the recording of compressional (P) and shear (S) waves which represent the full complement of “body” waves in seismology. Earthquake seismologists have been using the full complement for years to interpret the structure of our li

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18

Wei, Wang, and Zhang Zhijie. "The Intelligent Storage Recording System Based On Cluster Bombs Testing and The Data Analysis." Open Electrical & Electronic Engineering Journal 9, no. 1 (2015): 530–33. http://dx.doi.org/10.2174/1874129001509010530.

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According to the bullet of cluster bombs in the separated Rotate- speed, dispensing overload, parachuteopening overload, landing overload and other parameters testing background, this paper designs a intelligent storage recording system which selects a the thin film geomagnetic sensor and photoelectric accelerometer as the sensitive unit, the intelligent storage recording system is mainly composed of the FPGA controller, FLASH memory, 12 bit high speed analog to digital converter. After live-fire test and numerical analysis, intelligent storage recording system can accurately obtain the whole

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19

J, Anderssohn,, and Steinacker, A. "Satellite-supported measurement of ground motion for the recording and monitoring of elevations in the urban area of Böblingen Satellitengestützte Bodenbewegungsmessung zur Erfassung und überwachungvon Hebungen im Stadtgebiet von Böblingen." GIS Business 12, no. 3 (2019): 50–51. http://dx.doi.org/10.26643/gis.v12i3.5192.

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Satellite-supported measurement of ground motion for the recording and monitoring of elevations in the urban area of Böblingen Satellitengestützte Bodenbewegungsmessung zur Erfassung und überwachungvon Hebungen im Stadtgebiet von Böblingen

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20

Klomp, Sander R., Dennis W. J. M. van de Wouw, and Peter H. N. de With. "Real-time Small-object Change Detection from Ground Vehicles Using a Siamese Convolutional Neural Network." Electronic Imaging 2020, no. 6 (2020): 60402–1. http://dx.doi.org/10.2352/issn.2470-1173.2020.6.iriacv-325.

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Detecting changes in an uncontrolled environment using cameras mounted on a ground vehicle is critical for the detection of roadside Improvised Explosive Devices (IEDs). Hidden IEDs are often accompanied by visible markers, whose appearances are a priori unknown. Little work has been published on detecting unknown objects using deep learning. This article shows the feasibility of applying convolutional neural networks (CNNs) to predict the location of markers in real time, compared to an earlier reference recording. The authors investigate novel encoder–decoder Siamese CNN architectures and in

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21

Klomp, Sander R., Dennis W. J. M. van de Wouw, and Peter H. N. de With. "Real-time Small-object Change Detection from Ground Vehicles Using a Siamese Convolutional Neural Network." Journal of Imaging Science and Technology 63, no. 6 (2019): 60402–1. http://dx.doi.org/10.2352/j.imagingsci.technol.2019.63.6.060402.

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Abstract Detecting changes in an uncontrolled environment using cameras mounted on a ground vehicle is critical for the detection of roadside Improvised Explosive Devices (IEDs). Hidden IEDs are often accompanied by visible markers, whose appearances are a priori unknown. Little work has been published on detecting unknown objects using deep learning. This article shows the feasibility of applying convolutional neural networks (CNNs) to predict the location of markers in real time, compared to an earlier reference recording. The authors investigate novel encoder‐decoder Siamese CNN architectur

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22

Kirkland, Kevin, and Shannon Nesbitt. "The Therapeutic Value of Recording in Music Therapy for Adult Clients in a Concurrent Disorders Inpatient Treatment Facility." Voices: A World Forum for Music Therapy 19, no. 2 (2019): 21. http://dx.doi.org/10.15845/voices.v19i2.2636.

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While recording has traditionally been viewed as a practical, adjunctive role of the music therapist, here the authors examine the skillful use of recording devices and software as fertile ground for the development of therapeutic programs with tangible benefits for adult clients in a concurrent disorders recovery setting. The integration and layering of musical composition with musical performance, digital technologies, and production, invite rich and engaging conversations about therapeutic goals, processes, and outcomes. Using methods of action research inquiry, the authors discuss how the

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23

McLaughlin, K. L. "Maximum Likelihood Estimation of Strong-Motion Attenuation Relationships." Earthquake Spectra 7, no. 2 (1991): 267–79. http://dx.doi.org/10.1193/1.1585628.

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Strong-motion attenuation relations are commonly derived from earthquake ground motion collected on triggered recorders. Parametric attenuation relations are estimated from these data using standard least squares methods. The variance of ground acceleration is relatively large and for any given earthquake, there is a distance range for which only stations with larger than average amplitudes will trigger recording. Consequently observed accelerations at these distances are higher than the mean ground acceleration and a bias may be introduced into an attenuation relation regression by non-detect

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24

Moskvitin, A. A., and A. S. Pivovarov. "An Apparatus for Recording Defensive Responses to Tactile Stimulation in the Ground Snail." Neuroscience and Behavioral Physiology 34, no. 4 (2004): 323–26. http://dx.doi.org/10.1023/b:neab.0000018740.42089.6f.

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25

Jacobson, A. R., R. H. Holzworth, and X. M. Shao. "Observations of multi-microsecond VHF pulsetrains in energetic intracloud lightning discharges." Annales Geophysicae 29, no. 9 (2011): 1587–604. http://dx.doi.org/10.5194/angeo-29-1587-2011.

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Abstract. Certain intracloud lightning discharges emit energetic, multi-microsecond pulsetrains of radio noise. Observations of this distinctive form of lightning date from 1980 and have involved both ground-based and satellite-based radio recording systems. The underlying intracloud lightning discharges have been referred to as "Narrow Bipolar Pulses", "Narrow Bipolar Events", and "Compact Intracloud Discharges". An important discriminant for this species of radio emission is that, in the range above ~30 MHz, it consists of several microseconds of intense radio noise. When the intracloud emis

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26

Komi, Paavo V. "Force Measurements during Cross-Country Skiing." International Journal of Sport Biomechanics 3, no. 4 (1987): 370–81. http://dx.doi.org/10.1123/ijsb.3.4.370.

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To understand cross-country (X-C) siding it is important to record and identity forces of skis and poles separately and together. They both contribute to the forward progression, but their functional significance may be more complex than that of the ground reaction forces in running and walking. This report presents two methods to record forces on skis and poles during normal X-C skiing. A long force-platform system with four rows of 6-m long plates is placed under the snow track for recording of Fz and Fy forces of each ski and pole separately. This system is suitable especially for the study

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27

Stewart, Jonathan P., Giuseppe Lanzo, Alessandro Pagliaroli, et al. "Ground Motion Recordings from the Mw 6.3 2009 L'Aquila Earthquake in Italy and their Engineering Implications." Earthquake Spectra 28, no. 1 (2012): 317–45. http://dx.doi.org/10.1193/1.3673621.

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The 2009 L'Aquila earthquake sequence includes the April 6 Mw 6.3 main shock and triggered events on April 7 and 9, each recorded on a digital network having five stations on the hanging wall of the main shock fault. We describe a geometric source model drawing upon inversions by others. We describe record-specific ground motion data processing that includes the incorporation of static displacements of up to 13 cm (downdrop of hanging wall). The resulting database includes 47, 38, and 31 corrected triaxial recordings from the April 6, 7, and 9 events, respectively. We present site conditions f

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Cabas, Ashly, та Adrian Rodriguez-Marek. "VS-κ0 Correction Factors for Input Ground Motions Used in Seismic Site Response Analyses". Earthquake Spectra 33, № 3 (2017): 917–41. http://dx.doi.org/10.1193/22315eqs188m.

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Input motions used in seismic site response analyses are commonly selected based on similarities between the shear wave velocity ( V S) at the recording station, and the reference depth at the site of interest (among other aspects such as the intensity of the expected ground motion). This traditional approach disregards the influence of the attenuation in the shallow crust on site response. Given that this attenuation (damping) can be characterized by the distance-independent high-frequency attenuation parameter κ0, a V S -κ0 correction framework for input motions is proposed to render them co

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TAMURA, Keiichi, Kazuhiko KAWASHIMA, Koh AIZAWA, and Kazuyuki TAKAHASHI. "Recording accuracy of digital strong-motion accelerograph with independent triggering and recording system for analysis of finite ground strains induced during earthquakes." Doboku Gakkai Ronbunshu, no. 392 (1988): 367–75. http://dx.doi.org/10.2208/jscej.1988.392_367.

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30

Crognale, Michael A., and Gerald H. Jacobs. "Behavioral and electrophysiological sensitivity to temporally modulated visual stimuli in the ground squirrel." Visual Neuroscience 6, no. 6 (1991): 593–606. http://dx.doi.org/10.1017/s0952523800002583.

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AbstractBehavioral and electrophysiological methods were used to measure sensitivity to flickering lights in a dichromatic species, the California ground squirrel (Spermophilus beecheyi). Discrimination tests were used to determine spectral sensitivity at stimulus frequencies from 5–50 Hz and increment threshold spectral sensitivity. The contributions of retinal mechanisms to these capacities were assessed by recording the responses of optic nerve fibers to temporally modulated monochromatic lights. In the ground squirrel, as in the human, the shape of the spectral-sensitivity function depends

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31

Sheng, Xiao Wei, Jun Wei Han, and Ming Hui Hao. "Sound Analysis and Synthesis for Audio Simulation System of Flight Simulator." Advanced Materials Research 748 (August 2013): 708–12. http://dx.doi.org/10.4028/www.scientific.net/amr.748.708.

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Through simulating the feelings of vision, hearing, motion and force during flight, the flight simulator can build a realistic flight environment on the ground. Therefore, Flight simulators have an important role in pilot training field. Audio simulation system is a key component of the flight simulator, it has direct impact on the realism and immersion of flight simulation. In this paper, we introduced the development procedure of audio simulation system shortly. Software implementation and its key development technology were mainly focused for expressing the necessity of extracting sound sou

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32

Hui, YIN, SHI Changkai, LI Baikui, GUAN Shilei, and Liu Yue. "Single-phase ground fault location technology research and application based on transient recording wave." IOP Conference Series: Earth and Environmental Science 431 (February 25, 2020): 012002. http://dx.doi.org/10.1088/1755-1315/431/1/012002.

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33

Han, Sang Whan, and Hyun Woo Jee. "A Numerical Model for Simulating Ground Motions for the Korean Peninsula." Applied Sciences 10, no. 4 (2020): 1254. http://dx.doi.org/10.3390/app10041254.

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Ground motions are used as input for the response history analyses of a structure. However, the number of ground motions recorded at a site located in low-to-moderate seismic regions such as the Korean Peninsula is few. In this case, artificial ground motions need to be used, which can reflect the characteristics of source mechanism, travel path, and site geology. On 15 November, 2017, the Pohang earthquake, with a magnitude of 5.4 and a focal depth of 9 km, occurred near the city of Pohang. This earthquake caused the most significant economic loss among the earthquakes that occurred in the Ko

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Li, Heng, Dun Wang, Yong Jian Cai, Jian Chao Wu, and Gang Liu. "Baseline Correction of Digital Strong-Motion Data-Examples from the 2008 Wenchuan, China, Earthquake." Advanced Materials Research 378-379 (October 2011): 247–50. http://dx.doi.org/10.4028/www.scientific.net/amr.378-379.247.

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This paper analyzes key noises within digital strong-motion acceleration recording that can result in baseline offset, and according to their specific position provide a baseline correction scheme for preserving the long-period ground motion. This correction method is then applied to the digital acceleration records from the 2008 Wenchuan earthquake, and also, when compared with GPS data (including some high frequency of 1Hz GPS data), it is shown that this method can well restore displacement of ground motion, including permanent displacement which is the main concern of seismologists. Furthe

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Reese-Taylor, Kathryn, Armando Anaya Hernández, F. C. Atasta Flores Esquivel, et al. "Boots on the Ground at Yaxnohcah." Advances in Archaeological Practice 4, no. 3 (2016): 314–38. http://dx.doi.org/10.7183/2326-3768.4.3.314.

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AbstractThis study proposes a sampling method for ground-truthing LiDAR-derived data that will allow researchers to verify or predict the accuracy of results over a large area. Our case study is focused on a 24 km2area centered on the site of Yaxnohcah in the Yucatan Peninsula. This area is characterized by a variety of dense tropical rainforest and wetland vegetation zones with limited road and trail access. Twenty-one 100 x 100 m blocks were selected for study, which included examples of several different vegetation zones. A pedestrian survey of transects through the blocks was conducted, re

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Fábry, Stanislav, and Marek Češkovič. "Aircraft gas turbine engine vibration diagnostics." MAD - Magazine of Aviation Development 5, no. 4 (2017): 24. http://dx.doi.org/10.14311/mad.2017.04.04.

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In the Czech and Slovak aviation are in service elderly aircrafts, usually produced in former Soviet Union. Their power units can be operated in more efficient way, in case of using additional diagnostic methods that allow evaluating their health. Vibration diagnostics is one of the methods indicating changes of rotational machine dynamics. Ground tests of aircraft gas turbine engines allow vibration recording and analysis. Results contribute to airworthiness evaluation and making corrections, if needed. Vibration sensors distribution, signal recording and processing are introduced in a paper.

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Mazurkiewicz, Ewelina, Łukasz Ortyl, and Jerzy Karczewski. "Application of Geodetic Techniques for Antenna Positioning in a Ground Penetrating Radar Method." E3S Web of Conferences 35 (2018): 03005. http://dx.doi.org/10.1051/e3sconf/20183503005.

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The accuracy of determining the location of detectable subsurface objects is related to the accuracy of the position of georadar traces in a given profile, which in turn depends on the precise assessment of the distance covered by an antenna. During georadar measurements the distance covered by an antenna can be determined with a variety of methods. Recording traces at fixed time intervals is the simplest of them. A method which allows for more precise location of georadar traces is recording them at fixed distance intervals, which can be performed with the use of distance triggers (such as a

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38

Margaris, Basil, George Athanasopoulos, George Mylonakis, et al. "The 8 June 2008 Mw6.5 Achaia–Elia, Greece Earthquake: Source Characteristics, Ground Motions, and Ground Failure." Earthquake Spectra 26, no. 2 (2010): 399–424. http://dx.doi.org/10.1193/1.3353626.

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The Mw6.4 Achaia–Elia (Greece) earthquake on 8 June 2008 was a right-lateral strike-slip event on a nearly vertical faul. Moment tensor solutions coupled with geologic structure and aftershock distributions suggest a fault strike of approximately 210° on a previously unmapped fault. Rupture appears to have been concentrated over a 10–25 km depth range and did not break the surface. The northern rupture limit appears to correspond to a NW-striking normal fault near the Kato Achaia coastline. The mainshock was recorded by 27 accelerometers at distances from the surface projection of the fault ra

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Dilger, Stefan. "Recognition of manual forest work for time on task recording." Electronic Imaging 2021, no. 12 (2021): 26–1. http://dx.doi.org/10.2352/issn.2470-1173.2021.12.fais-026.

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In the manual forestry, the worker carries his equipment to a tree by foot. There the tree is felt and processed. Depending on the surrounding, this needs more or less time. This paper automatically analyses the needed time for different activities. Therefore, the worker gets an estimate of his time spends on different tasks and can estimate his productivity. The approach uses therefor a mobile phone and a smartwatch. This work could also be used to conduct general time studies for time and equipment comparison. The focus is on the frequency analysis, feature creation and the obstacles, such a

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Poletto, Flavio, Francesco Miranda, Biancamaria Farina, and Andrea Schleifer. "Seismic-while-drilling drill-bit source by ground force: Concept and application." GEOPHYSICS 85, no. 3 (2020): MR167—MR178. http://dx.doi.org/10.1190/geo2019-0449.1.

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For four decades, the use of the drill-bit seismic source has been evaluated extensively and investigated for seismic-while-drilling (SWD) purposes. After an initial diffusion phase, however, the routine application on drill-bit reverse vertical seismic profiling (RVSP) has declined because of issues related to variability in the signal-to-noise ratio of drill-bit signals obtained with different drilling conditions. Consequently, additional efforts have been dedicated to improving the recording of reference signals. Recent technology developments enable direct ground-force pilot measurements a

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Gould, John W., and W. Zenk. "The SCOR Working Group 21 intercomparison of recording current meters on R/V "AKADEMIK KURCHATOV" – 50 years later." Journal of Oceanological Research 48, no. 3 (2020): 31–53. http://dx.doi.org/10.29006/1564-2291.jor-2020.48(3).3.

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This paper describes the activities of SCOR WG21 that carried out intercomparisons of moored, recording current meters in the late 1960s and early 1970s. The paper focusses particularly on the WG’s involvement in the 7th voyage of R/V “Akademik Kurchatov” and its participation in the ground-breaking Polygon–70 programme.

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Jeng, Yih. "Shallow seismic investigation of a site with poor reflection quality." GEOPHYSICS 60, no. 6 (1995): 1715–26. http://dx.doi.org/10.1190/1.1443904.

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A shallow seismic reflection experiment was performed on a construction site to determine the feasibility of using reflection seismology to investigate the shallow structure in a weathered sand‐gravel interlayered zone that was known to be a poor transmission of high‐frequency seismic energy. Field‐recording parameters were designed to fit the limited space of the urban construction survey area. A 7 kg sledgehammer was used to generate P‐waves and SH‐waves. Single 100 Hz geophones were deployed at 1.0 m/0.5 m group intervals, and 200/100-Hz low‐cut filters were applied prior to A to D conversi

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Jackson, Suzette M., and John Boatwright. "Strong ground motion in the 1983 Borah Peak, Idaho, earthquake and its aftershocks." Bulletin of the Seismological Society of America 77, no. 3 (1987): 724–38. http://dx.doi.org/10.1785/bssa0770030724.

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Abstract Thirteen strong-motion accelerographs sited in a permanent array at the Idaho National Engineering Laboratory (INEL) were the closest instruments to the MS = 7.3 1983 Borah Peak, Idaho, earthquake. They recorded the event at epicentral distances of 90 to 110 km. The peak horizontal accelerations or peak ground accelerations (PGAs) at the basement and free-field sites of the array ranged from 0.022 to 0.078 g. For 2 weeks after the main shock, the U.S. Geological Survey maintained an array of digital seismographs in the epicentral area; these instruments recorded six large aftershocks

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Swadlow, Harvey A., Yulia Bereshpolova, Tatiana Bezdudnaya, Monica Cano, and Carl R. Stoelzel. "A Multi-Channel, Implantable Microdrive System for Use With Sharp, Ultra-Fine “Reitboeck” Microelectrodes." Journal of Neurophysiology 93, no. 5 (2005): 2959–65. http://dx.doi.org/10.1152/jn.01141.2004.

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Arrays of closely spaced quartz-insulated, platinum-tungsten microelectrodes are widely used to obtain acute recordings from chronically prepared subjects. These electrodes have excellent recording characteristics and can be fabricated to a wide variety of tip specifications. Typically, in such experiments, electrodes are introduced into, and removed from, the brain on a daily basis and, over many months of study, hundreds of penetrations may be made through an intact dura. This procedure has benefits as well as problems and risks. For some experimental aims, it might be desirable to leave the

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Steer, David N., Larry D. Brown, James H. Knapp, and David J. Baird. "Comparison of explosive and vibroseis source energy penetration during COCORP deep seismic reflection profiling in the Williston Basin." GEOPHYSICS 61, no. 1 (1996): 211–21. http://dx.doi.org/10.1190/1.1443941.

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Comparison of high‐fold (50) vibroseis recordings with coincident low‐fold (6) explosive source data from deep reflection surveys in the Williston Basin indicates that while vibroseis generated energy decays to ambient noise levels at 7–9 s two‐way traveltime (twtt) (20–30 km depth), energy from explosive sources remains above ambient levels to 35–60 s twtt (105–180 km depth). Moreover, single, moderately sized (30 kg) and well‐placed charges proved to be as effective as larger (90 kg) sources at penetrating to mantle traveltimes in this area. However, the explosive source energy proved highly

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Kwok, On Lei Annie, Jonathan P. Stewart, Dong Youp Kwak, and Pang-Li Sun. "Taiwan-Specific Model for VS30 Prediction Considering Between-Proxy Correlations." Earthquake Spectra 34, no. 4 (2018): 1973–93. http://dx.doi.org/10.1193/061217eqs113m.

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Ergodic site response models are generally conditional on the time-averaged shear wave velocity in the upper 30 m ( V S30). Ground motion databases contain many recordings from Taiwan, and because of site characterization efforts, 56% of recording sites have V S30 derived from measurements. We develop proxy-based V S30 prediction models, one application of which is for the remaining 44% of Taiwan sites. Our approach, which can be suitable for other regions, differs from previous studies in which proxies are based on detailed geologic categories and possible within-category topographic gradient

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Wibawa, Gumbira Panji, Akadun Akadun, and Arip Rahman Sudrajat. "Pengawasan Penggunaan Air Tanah di Wilayah Perkotaan Kabupaten Sumedang." Jurnal Administrasi Publik : Public Administration Journal 8, no. 2 (2018): 147. http://dx.doi.org/10.31289/jap.v8i2.1693.

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<h1>In accordance with Regional Regulation Sumedang District No. 14 of 2011 on the Management of Ground Water, among which stated that every groundwater management must have a permit. However, in the implementation of violations of the rules and the weak enforcement of sanctions. Lack of public understanding of the importance of how good groundwater utilization is based on established rules is a constraint that leads to efforts to maintain the stability of groundwater availability. This can lead to more uncontrolled use of ground water. The objective of this research is to identify and s

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Shi, Baoping, Abdolrasool Anooshehpoor, Yuehua Zeng, and James N. Brune. "Rocking and overturning of precariously balanced rocks by earthquakes." Bulletin of the Seismological Society of America 86, no. 5 (1996): 1364–71. http://dx.doi.org/10.1785/bssa0860051364.

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Abstract Precariously balanced rocks in seismically active regions may be used to provide constraints on probabilistic estimates of strong ground motion. A computer program is developed to study the rocking response of models of precariously balanced rocks when subjected to various levels of ground accelerations. The computer code, validated by comparing the numerical and experimental results for simple-shaped rigid blocks, is used to study the rocking response of rectangular blocks with various aspect ratios to the El Centro strong ground motion recording of the 18 May 1940 Imperial Valley ea

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Van Gestel, Jean‐Paul, and Paul L. Stoffa. "Application of Alford rotation to ground-penetrating radar data." GEOPHYSICS 66, no. 6 (2001): 1781–92. http://dx.doi.org/10.1190/1.1487120.

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We investigate the application of Alford rotation to ground‐penetrating radar (GPR) data. By recording the reflected field amplitudes using four different configurations, we extract information about the orientation of buried objects that have angle‐dependent reflectivity. In theory this method can be successfully applied to find the orientation of dipping layers, cylinders, and vertical fractures. Modeling results show angle‐dependent reflections in all three cases; as a result, we can exactly determine the orientation of these targets. Analysis of a field survey at a controlled GPR test site

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Lu, Zhao, Ren Yu Zuo, and Xiang Ruan. "Ground Motion Distribution Analysis about Taipei-101 in Earthquake." Advanced Materials Research 671-674 (March 2013): 1346–50. http://dx.doi.org/10.4028/www.scientific.net/amr.671-674.1346.

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It is important for tall building to infer seismic hazard analysis. Recently, researchers paid great efforts to study the seismic hazard analysis using the method of probabilistic seismic hazard analysis (PSHA), and PSHA has been proved to be sound and popular. The PSHA method is not new. However, the use of PSHA in China is not extensive. The purpose of this paper is to explore the use of ground motion distribution analysis about one typical tall building Taipei-101. Based on the earthquake catalog around Taiwan with more than 50,000 events over 100-years of recording, the author takes Taipei

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