scholarly journals Effects of Anthropic and Ambient Vibrations on Archaeological Sites: The Case of the Circus Maximus in Rome

Geosciences ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 463
Author(s):  
Luca Maria Puzzilli ◽  
Giovanni Bongiovanni ◽  
Paolo Clemente ◽  
Vincenzo Di Fiore ◽  
Vladimiro Verrubbi
Keyword(s):  
Ambient Vibration ◽  
Pop Music ◽  
Buried Structures ◽  
Limit Values ◽  
Social Events ◽  
Single Station ◽  
Frequency Domains ◽  
Before And After ◽  
Large Audience ◽  
Circus Maximus

The vibration effects on the Torre della Moletta and the ruins of the Circus Maximus in Rome are analyzed in the framework of a preservation effort of this archaeological area. Thanks to its exceptional size, the Circus hosts many social events with large audience (pop-music, opera concerts, sport celebrations, etc.) every year, thus taking the structures under high anthropic and environmental stress. Recordings were completed before, during, and after the concert of a famous band, on 7 September 2019. Data were analyzed, both in time and frequency domains. The experimental dynamic recordings were coupled with a surface waves test and single-station ambient vibration recordings, which were useful for the geotechnical characterization of the soil. The results pointed out the differences in amplitudes but also in terms of frequency content of the recorded velocities during the concert with respect to before and after it. The maximum velocities recorded at various locations were almost similar to the limit values suggested by codes. The dynamic behavior of the ground and the structures is influenced by the presence of buried structures.

Fieldwork on local-site seismic response in the Po Plain: examples from ambient vibration array and single station analyses

2016 ◽  
Vol 15 (6) ◽  
pp. 2349-2366 ◽  
Author(s):  
M. Massa ◽  
C. Mascandola ◽  
C. Ladina ◽  
S. Lovati ◽  
S. Barani
Keyword(s):  
Seismic Response ◽  
Ambient Vibration ◽  
Po Plain ◽  
Local Site ◽  
Single Station

scholarly journals Regional Seismic Characterization of Shallow Subsoil of Northern Apulia (Southern Italy)

Geosciences ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 416
Author(s):  
Enrico Paolucci ◽  
Giuseppe Cavuoto ◽  
Giuseppe Cosentino ◽  
Monia Coltella ◽  
Maurizio Simionato ◽  
...  
Keyword(s):  
Southern Italy ◽  
Carbonate Platform ◽  
Low Cost ◽  
Principal Component ◽  
Ambient Vibration ◽  
Resonance Effects ◽  
Resonance Phenomena ◽  
Single Station ◽  
Seismic Characterization

A first-order seismic characterization of Northern Apulia (Southern Italy) has been provided by considering geological information and outcomes of a low-cost geophysical survey. In particular, 403 single-station ambient vibration measurements (HVSR techniques) distributed within the main settlements of the area have been considered to extract representative patterns deduced by Principal Component Analysis. The joint interpretation of these pieces of information allows the identification of three main domains (Gargano Promontory, Bradanic Through and Southern Apennines Fold and Thrust Belt), each characterized by specific seismic resonance phenomena. In particular, the Bradanic Through is homogeneously characterized by low frequency (<1 Hz) resonance effects associated with relatively deep (>100 m) seismic impedance, which is contrasting corresponding to the buried Apulian carbonate platform and/or sandy horizons located within the Plio-Pleistocene deposits. In the remaining ones, relatively high frequency (>1 Hz) resonance phenomena are ubiquitous due to the presence of shallower impedance contrasts (<100 m), which do not always correspond to the top of the geological bedrock. These general indications may be useful for a preliminary regional characterization of seismic response in the study area, which can be helpful for an effective planning of more detailed studies targeted to engineering purposes.

large audience” (Goldstein 1983: 26); and “Here was an Australian with a wry sense of humor and gruff charm [this was post-Crocodile Dundee], equally alluring to men and women” (Brown 1987: 33). In other words, Robert Scorpio is conveniently – if not tokenistically – played by an Australian. The limits of tolerance of the non-American for the world of network soap are instanced in General Hospital’s casting criteria for an (American) actor to play Robert Scorpio’s long-lost brother, Malcolm. The actor, John J. York, is quoted in the ABC house journal, Episodes, saying: “They didn’t want a strong dialect [sic] . . . . They didn’t want a Paul Hogan type, because that accent is too strong. They were saying ‘just a hint’” (Kump 1991: 29). The Australian is more “exotic” than Peter Pinne may have wished: too exotic. Just the accent, though, if muted, can have an appealing otherness. The second index of the acceptability of the non-American, again Australian, has yet to be tested on the American market place. Called Paradise Beach, it is not a ready-made Australian soap seeking overseas sales, but a co-production between the Australian-based Village Roadshow, Australia’s Channel 9, and the American New World Entertainment, which has secured pre-sales to the CBS network at 7:30 p.m. week-nights (beginning June 14, 1993) and Britain’s Sky Channel as well as in nine other territories worldwide (Gill 1993; Chester 1993; Shohet 1993). As an Australian-based soap directed primarily at a teen audience, it recalls Neighbours and Home and Away. As a youth drama serial set in a beach tourism center, it recalls Baywatch and summer holiday editions of Beverly Hills 90210. And like Melrose Place and the Australian E Street, each episode includes what one report breathily calls “an MTV moment . . . a two-minute montage of sleek shots of beautiful bodies and plenty of sun, surf and sand set to the latest pop music hit” (Shohet 1993: 5). Set in and around Surfers Paradise on Queensland’s Gold Coast, it recalls, for Australian viewers, the 1983 film, Coolangatta Gold, which celebrates Australian beach culture (see Crofts 1990). It is noteworthy indeed that most of the performers are recuited from a model agency, not an actor’s agency. An American actor, Matt Lattanzi, plays an American photographer, and Australian actor, Tiffany Lamb, sports an American accent. There is a concern, understandable in a program sold overseas, to make Australian colloquialisms comprehensible (Gill 1993: 2). In terms of physical geography, the locations are Australian; in terms of cultural geography, Queensland’s Gold Coast is substantially indistinguishable from much of Florida and parts of California and Hawaii. The era of the co-production re-poses the question of the degree of acceptability of non-American material in the American market-place by begging the question of the distinguishability of the two. But given the unequal cultural exchange long obtaining between Australia and the US, with shows like Mission: Impossible being filmed in Australia to take advantage of cheap labor; given the tight money of Paradise Beach’s shooting schedule of 2.5 hours of soap per week; and given New World’s Head’s, James McNamara, ignorance of Australian soaps (“Paradise Beach is the first soap to be skewed at a teen audience” (quoted by Gill 1993: 2)), one might wonder which party is defining the

2002 ◽  
pp. 123-123
Keyword(s):  
New World ◽  
Physical Geography ◽  
Gold Coast ◽  
Pop Music ◽  
Market Place ◽  
Sense Of Humor ◽  
The Us ◽  
The World ◽  
Beach Tourism ◽  
Large Audience

Geopsy: A User-Friendly Open-Source Tool Set for Ambient Vibration Processing

2020 ◽  
Vol 91 (3) ◽  
pp. 1878-1889 ◽  
Author(s):  
Marc Wathelet ◽  
Jean-Luc Chatelain ◽  
Cécile Cornou ◽  
Giuseppe Di Giulio ◽  
Bertrand Guillier ◽  
...  
Keyword(s):  
Open Source ◽  
User Interfaces ◽  
Site Characterization ◽  
Ambient Vibration ◽  
The European Union ◽  
Vibration Data ◽  
Single Station ◽  
Characterization Studies ◽  
Single Trace ◽  
User Friendly

Abstract Ambient vibrations are nowadays considerably used worldwide for numerous types of engineering applications and scientific research. Geopsy and its companion tools are part of that landscape. Since the first release of the program package in 2005, as outcome of the European Union project Site Effects aSsessment from AMbient noisE, Geopsy has become a mature multiplatform open-source package (released under GNU Public License version 3) that has already been recognized as a reference tool for analyzing ambient vibration data in the context of site characterization studies. The community of users has grown from a core group of researchers up to thousands of seismologists and engineers on every career level and on all continents. The versatility of geopsy allows for the processing of all kinds of data needed in site characterization studies, that is, from single station single trace to three-component array recordings. In all of the aforementioned cases, the steps from field acquisition to the production of publication-ready figures are covered and supported by user-friendly graphical user interfaces or corresponding command-line tools for the automation of the complete processing chain. To avoid black-box usage, a number of lower-level tools guarantee maximum flexibility in accessing and controlling processing results at any stage of the analysis.

FE Model Updating for Health Monitoring of Structures and its Experimental Verification by Damage Detection

2006 ◽  
Vol 321-323 ◽  
pp. 268-272 ◽  
Author(s):  
Gwang Hee Heo ◽  
Joon Ryong Jeon ◽  
Chin Ok Lee ◽  
Gui Lee ◽  
Woo Sang Lee
Keyword(s):  
Damage Detection ◽  
Health Monitoring ◽  
Model Updating ◽  
Basic Structure ◽  
Ambient Vibration ◽  
Fe Model ◽  
Error Matrix ◽  
Error Ratio ◽  
Before And After ◽  
Fe Model Updating

This paper presents an effective method of FE model updating for health monitoring of structures by applying ambient vibration. And this method is experimented through damage detection and proved to be valid. Experiment about ambient vibration is performed on cantilever beam, and the dynamic characteristics are analyzed by NExT and ERA. The results of such experiments are compared to those of FE analysis, and this comparison enables us to overcome some errors in experiments and analysis. On the basis of improved results by the comparison, model updating is performed in order to construct a basic structure for health monitoring. For model updating, we employ direct matrix updating method (DMUM) and Error matrix method (EMM) in which ambient vibration is easily applied. The model updating by the methods are again evaluated in terms of error ratio of natural frequency, comparing each result before and after updating. Finally, we perform experiments on damage detection to verify the method of updating presented here, and evaluate its performance by eigen-parameter change method. The evaluation proves that the method of FE model updating using ambient vibration is effective for health monitoring of structure, and some further application of this method is suggested.

Inspecting historical vaulted ceilings by means of physical and chemical analyses: an integrated approach combining active infrared thermography and reflectance spectroscopy

2020 ◽  
Vol 62 (3) ◽  
pp. 144-151 ◽  
Author(s):  
S Sfarra ◽  
E Cheilakou ◽  
P Theodorakeas ◽  
C Ibarra-Castanedo ◽  
H Zhang ◽  
...  
Keyword(s):  
Infrared Thermography ◽  
Near Infrared ◽  
Diffuse Reflectance Spectroscopy ◽  
Central Italy ◽  
Integrated Approach ◽  
Reflectance Spectroscopy ◽  
Fibre Optics ◽  
Buried Structures ◽  
Before And After ◽  
Physical And Chemical

The present study discusses the experimental physicochemical results obtained from the historical vaulted ceilings of an ancient church located in central Italy. Infrared thermography (IRT) in the active configuration was used to map subsurface defects caused by a seismic event and to discover buried structures, while the visible and near-infrared (VIS-NIR) fibre-optics diffuse reflectance spectroscopy (FORS) technique was applied to identify the pigments of wall paintings decorating the vault. Historical photographs are useful to readers in order to clarify the state of conservation before and after the earthquake that took place in 2009. The combination of the experimental results can be useful in restoration processes.

Ambient Vibration Tests of the Mexicali General Hospital

1991 ◽  
Vol 7 (2) ◽  
pp. 281-300 ◽  
Author(s):  
L. Mendoza ◽  
A. Reyes ◽  
J. E. Luco
Keyword(s):  
General Hospital ◽  
Ambient Vibration ◽  
Mode Shapes ◽  
Ambient Vibration Tests ◽  
Longitudinal Response ◽  
Modal Damping ◽  
Longitudinal Stiffness ◽  
Before And After ◽  
Vibration Tests ◽  
Transverse Response

Results of ambient vibration tests of the eight-story reinforced-concrete hospitalization tower of the Mexicali General Hospital are described. The structure suffered some damage during the November 1987 Superstition Hills earthquakes. The tests were conducted in April and August 1989 before and after major alterations of the building were made. The frequencies, modal damping ratios and mode shapes of some of the longitudinal, transverse and torsional modes were determined for the April and August 1989 conditions. It was found that the removal of the facade of the building resulted in a reduction of the longitudinal stiffness of the structure of the order of fifty percent. Measurements of the translation and rocking of the base indicate that soil-structure interaction effects play a moderate role in the transverse response of this structure and a negligible role in its longitudinal response.

scholarly journals Usefulness of basic laboratory parameters for monitoring during the perianesthetic period for selected ophthalmic operations in mesaticephalic and brachycephalic dogs

2017 ◽  
Vol 73 (10) ◽  
pp. 666-670 ◽  
Author(s):  
Agnieszka Wrzesińska ◽  
Włodzimierz Kluciński ◽  
Magdalena Garncarz
Keyword(s):  
Liver Function ◽  
General Anesthesia ◽  
Liver Enzymes ◽  
Negative Impact ◽  
Clinical Signs ◽  
Biochemical Tests ◽  
Creatinine Concentration ◽  
Limit Values ◽  
Before And After ◽  
Ophthalmologic Examination

The aim of this study was to compare the usefulness of laboratory diagnostic parameters dedicated for general anesthesia in brachycephalic and mesaticephalic dogs. The study was performed on two groups of dogs of 112 animals each, representing two different morphotypes, brachycephalic and mesaticephalic ones, which underwent general anesthesia with medetominidine, midazolam, propofol and isoflurane. Before and after anesthesia, the dogs underwent basic haematological and biochemical tests. In 18% of mesaticephalic dogs and 16% of brachycephalic dogs, the results of laboratory blood tests show a significant increase in the activity of liver enzymes: aspartate aminotransferase (AST), alanine phosphatase (ALT) and alkaline phosphatase (ALP), even though the animals showed no clinical signs other than those recognized in ophthalmologic examination. This demonstrates the presence of subclinical hepatic changes in these animals. Moreover, general anesthesia had a greater negative impact on liver function if liver enzyme values had exceeded certain levels before the anesthesia (AST > 61 U/L, ALT > 91 U/L). This made it possible to define new, useful upper limit values of AST and ALT for subclinical dogs before anesthesia that could lead to more serious complications of liver function after anesthesia. Among all the examined parameters, it is beneficial to monitor the activity of AST, ALT and ALP during the perianesthetic period. In the postanesthesia monitoring, creatinine concentration should also be included.

scholarly journals Ambient Vibration Recording for Single-Station, Array and Building Studies Made Simple: CityShark II

2012 ◽  
Vol 03 (06) ◽  
pp. 1168-1175 ◽  
Author(s):  
Jean-Luc Chatelain ◽  
Bertrand Guillier ◽  
Philippe Guéguen ◽  
Julien Fréchet ◽  
Jacques Sarrault
Keyword(s):  
Ambient Vibration ◽  
Single Station
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