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Search Results: 1 - 10 of 1598 matches for " Synthetic Seismograph "
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Structural Interpretation and Petrophysical Analysis for Reservoir Sand of Lower Goru, Miano Area, Central Indus Basin, Pakistan  [PDF]
Muhammad Sohail Khan, Farhana Masood, Qadeer Ahmed, Ishtiaq Ahmed Khan Jadoon, Naveed Akram
International Journal of Geosciences (IJG) , 2017, DOI: 10.4236/ijg.2017.84020
Abstract: The main purpose of this research is to estimate the structural analysis and hydrocarbon potential of Miano Block by using seismic and well log techniques. Miano area hosts a number of gas fields with structural and stratigraphic traps. The area is located in Central Indus Basin which is a part of an extensional regime exhibiting normal faulting due to the split of the Indian Plate firstly from Africa and then from Madagascar and Seychelles. Miano area recognized as a proven petroleum province which has complex tectonic history of Cretaceous extensional and overprints of Tertiary strike-slip tectonics. The area has prospect with accumulation of hydrocarbons in structural and stratigraphic traps including pinchouts. NW-SE oriented Khairpur and Mari Highs are main structural features with impact on the fault system. The sands of Lower Goru of Lower Cretaceous age are acting as a reservoir in the area. The area has great potential of hydrocarbons for which more exploratory wells are required to be drilled with better insight of structural and stratigraphic traps.
Luigi Palmieri: first scientific bases for geophysical surveillance in Mt. Vesuvius area
S. Borgstrom,M. De Lucia,R. Nave
Annals of Geophysics , 1999, DOI: 10.4401/ag-3741
Abstract: Luigi Palmieri (Faicchio 1807 -Naples 1896), was appointed Director of the Vesuvius Observatory in 1855. He rea1ized the first model of electromagnetic seismograph and the uninterrupted use at the Observatory of this instrument represented the first step towards a geophysical sensu strictu surveillance of Mt. Vesuvius area. Already at the end of the 18th century, Ascanio Filomarino had built a mechanical seismograph which was ab1e to record the amplitude of the seismic waves, the incoming direction of the earthquake and its starting time. In 1862 Michele Baldacchini proposed to the Neapolitan scientific community a question about the possibility to use the study of precursory signs of the Vesuvian eruptions to inform in advance people living near the vo1cano. Palmieri answered Baldacchini's request, giving proof of extreme far-sightedness from the scientific point of view but, similarly, much concreteness from the practica1 point of view: he described, with modern ideas, the things to do in order to carry out the surveillance in the Mt. Vesuvius area, but concluded thus: "Till we have not the (economic and instrumental) means we have spoken above, I think it is useless to entertain the Academy about the nature and the method of the observations and investigations to be performed".
Estudo das vibra??es geradas por detona??es feitas na obra civil da Eclusa 2 de Tucuruí (PA)
Fran?a, George Sand;Vasconcelos, Marcos Alberto Rodrigues;Chimpliganond, Cristiano Naibert;Tomás, Sidinei Sebasti?o;
Revista Brasileira de Geofísica , 2011, DOI: 10.1590/S0102-261X2011000100004
Abstract: the construction of the tucuruí dam in the decade of 80, situated in the river tocantins, interrupted the navigation in this stretch of the watercourse. to give continuity to the passage of the fluvial transports the eletronorte and camargo corrêa s.a., initiated the construction of two canals in the neighborhoods of the city of tucuruí/pa. floodgate 1 is connected to the axis of the dam, and floodgate 2 will be situated near the city of tucuruí, in the left edge of the tocantins river. the dismounting of the rocks caused discomfort to the population which complained about damages in the residences. in this way, the seismological observatory of the university of brasília monitored the vibrations generated by blasting, with the aim to make a diagnosis and see if there is a relation between the detonations and the residences cracks. the velocity records of the particle vibration were obtained by engineering seismometer installed near the damaged residences. records of 27 distinct points were analysed, and these information were intercorrelated with geological, pedological and geotechnical data, to understand its effects and to obtain the equation of seismic attenuation for this region. the 42 values of the particles velocity obtained were below the recommended value of 15 mm/s defined by the brazilian norms as the upper level to avoid damages to the nearby residences. regarding the sound pressure only one single measured value was beyond the intensity established by the brazilian norms.
Seismic Site Characterization Using Shear Wave Velocities of Gandhinagar City, Gujarat, India
Science and Technology , 2011, DOI: 10.5923/j.scit.20110101.03
Abstract: The recent devolvement in geophysical methods in particular Multi-channel Analysis of Surface Wave (MASW) technique is widely used for determining the 1D and 2D shear wave velocity of the subsurface materials. Though there are three types of MASW technique, only the data acquisition, data processing and inversion of active MASW technique are discussed in this paper. An attempt has been made to measure the shear wave velocities and hence site characterization using active MASW technique of the Gandhinagar City for engineering application. The active MASW survey consists of 24-channel Geode Seismograph with 24 geophones of 4.5Hz capacity, sledge hammer of 10kg with switch, hammer plate, and supporting software is used for the survey of Gandhinagar City. The survey points have been selected in such a way that the result represents the soil characteristics of the entire site; here the receivers are placed in linear array. Here Surfseis software is used for the data analysis. The Surfseis is designed to generate Vs of either 1D or 2D format using a simple three steps procedure: preparation of a Multichannel record, dispersion-curve analysis and inversion. The shear wave velocities (Vs) of Gandhinagar City increases with depth from 250 m/s to 450 m/s and the harmonic mean (Vs30) of Vs is in the range 250 m/s to 350 m/s up to 30 meter depth. The soil condition of Gandhinagar City is stiff soil and can not possess liquefactions.
Canadian plans for participation in GSETT 3
R. N. North
Annals of Geophysics , 1994, DOI: 10.4401/ag-4204
Abstract: The Geological Survey of Canada (GSC) is making preparations for Canadian participation in GSETT 3 but will be unable to make a formal commitment until the necessary resources have been secured. As Canada is expected to provide at least four alpha stations, and a significant number of beta stations, the financial resources that will be needed are substantial, even though in many respccts the GSC is, with the recent modernization of the Yellowknife array and the ongoing installation of the Canadian National Seismograph Network (CNSN), well positioned to make a significant contribution to GSETT 3. The CNSN currently (October 1993) consists of 17 broad band stations and will grow to 23 and 33 such stations by December 1993 and December 1994 respectively. Some 40 50 short period stations will complete the network. Data from all sites are continuously telemetered in real time to network acquisition centres in Ottawa and Sidney, British Columbia, archived to optical disk, and kept on line in a 72 h ring buffer. Most of the broadband sites could serve as either alpha or beta stations once the necessary software for continuous data transfer, or on request provision, of data from the selected sites has been completed. This software wili be configured so that changes in station selection are easy to implement, and this will provide considerable flexibility to the GSETT 3 planning and operations working groups in selecting the optimum network. Backup stations can be designated in the case of station failures, and the network centre in British Columbia will serve, at least for beta stations, as a backup NDC to that in Ottawa. Data from. the Yellowknife array are collected in Yellowknife and forwarded in ten minute files to Ottawa, where processing is completed and the results archived. This arrangement would not meet the deadlines for receipt of alpha station data at the IDC and new hardware and software will be needed to forward the data more immediately from Yellowknife to Ottawa. Although the procedures and formats for both alpha and beta station data have not yet been agreed upon, or even discussed, by the GSE, it is apparent that new facilities will be re quired in Ottawa to multiplex and reformat data for transmission to the IDC. We anticipate that a dedicated 56 kbaud link will be needed between Ottawa. and Washington.
Improving Functional Characteristics of Wool and Some Synthetic Fibres  [PDF]
O. G. Allam
Open Journal of Organic Polymer Materials (OJOPM) , 2011, DOI: 10.4236/ojopm.2011.11002
Abstract: The present article reviews recent developments in different treatments that confer functional characteristics on wool and some synthetic fibers such as acrylic, polyamide and polyester of these functionalities mention is made of shrinkage-resistance, felt proofing, ant pilling, antimicrobial, surface properties (hydrophilic, soil –resistance, water and oil-repellency), self-cleaning, anti odor and flame retardant. The article also illustrates nanotechnology applications to improve and / or to induce some of these properties. Improvement of these properties can give the fibres an important position between the textile fibres which make them more convenient in different uses.
Review of Survey Activities 2005: Earthquake seismology in Greenland – improved data with multiple applications
Larsen, Tine B.,Dahl-Jensen, Trine,Voss, Peter,J?rgensen, Thomas M?ller
Geological Survey of Denmark and Greenland Bulletin , 2006,
Abstract:
Evaluation of Effects of Synthetic Compound and Mineral Admixture on Crystal Structure of Concrete  [PDF]
Samuel Oloruntoba Olugbenga Olusunle, Theresa Chikwuo Ezenwafor, Bidemi Sikirat Jiddah-Kazeem, Akeem Kareem, Ojo Jeremiah Akinribide, Adekunle Taofeek Oyelami
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2015, DOI: 10.4236/jmmce.2015.33016
Abstract: The effects of mineral admixture on the internal morphology of concrete were studied and evaluated in this work. Portland cement with five different additives was used in the complex admixture. These includes: extracted silica from corn hob ash, synthetic calcium carbonate, synthetic calcium hydrogen carbonate, white and dark kaolin, each replacing 10% of cement in the concrete formulation. The additives and the pure cements were subjected to intensive mixing to ensure homogeneity prior to water addition, after which each undergoes casting and curing. Elemental characterizations of the additives indicated the presence of some elemental oxides and crystallography studies were carried out on the pure and reinforced concrete. The obtained result indicated crystallographic adjustments of the indigenous concrete which will definitely contribute to modifying its mechanical properties.
A New Factorized Backprojection Algorithm for Stripmap Synthetic Aperture Radar  [PDF]
Kyra Moon, David G. Long
Positioning (POS) , 2013, DOI: 10.4236/pos.2013.41006
Abstract: Factorized backprojection is a processing algorithm for reconstructing images from data collected by synthetic aperture radar (SAR) systems. Factorized backprojection requires less computation than conventional time-domain backprojection with minimal loss in accuracy for straight-line motion. However, its implementation is not as straightforward as direct backprojection. This paper provides a new, easily parallelizable formulation of factorized backprojection designed for stripmap SAR data that includes a method of implementing an azimuth window as part of the factorized backprojection algorithm. We compare the performance of windowed factorized backprojection to direct backprojection for simulated and actual SAR data.
Professional Disputation  [PDF]
Takeo Nakagawa, Ai Nakagawa, Hiroyuki Iida, Shungo Kawanishi
Creative Education (CE) , 2013, DOI: 10.4236/ce.2013.48072
Abstract:

This paper stresses an importance of the professional disputation, being initiated by the Department of Mechanical Engineering, Monash University in Australia. It explains the history of the subject, aims and procedure in a logical order, so that any individual or any institution can take advantage of this unique and extremely useful intellectual training system to equip researchers, students and/or businessmen with powerful oral and written skills in presentation of their thesis or proposition. The professional disputation is synthetic and systematic research training system or a game which has been elaborated by well-trained scholars upon the past human intellectual history.

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