scholarly journals MANIFESTATIONS OF MODERN FLUID DYNAMIC ACTIVITY OF THE NORTHERN CASPIAN SEA (GEOPHYSICAL DATA)

2019 ◽  
Vol 47 (5) ◽  
pp. 98-115
Author(s):  
V. A. Putans ◽  
L. R. Merklin ◽  
A. Yu. Ivanov ◽  
A. K. Ambrosimov
Keyword(s):  
Satellite Images ◽  
Fluid Dynamic ◽  
Geophysical Data ◽  
Shirshov Institute ◽  
Dynamic Activity ◽  
Seismic Section ◽  
Section Data ◽  
Escape Theory ◽  
Sea Bottom ◽  
Bottom Structures

The paper presents analysis of geological-geophysical data, both from archives and collected in recent expeditions by Shirshov Institute of Oceanology, RAS (SIO RAS) together with satellite data. The interpretation shows modern rise of fluid dynamic activity on North Caspian. Based on summary of previous data, it is possible to recognize ryithmostratigraphic and seismostratigraphic complexes. Side sonar data shows many reflexing objects on the sea bottom. One of the most prominent features of Northern and Central Caspian is great number of pipe-like vertical bodies, they were discovered by SIO RAS expeditions with high-resolution seismic methods. These “pipes” go down beyond seismic section data. All specified seismic anomalies and bottom microrelief can be considered as evidence of vertical migration of gas and water via sediments and its escaping to water by gas and water grifons. Satellite images of North and Central Caspian show great amount of sliks and oil signs on the sea surface, and some of them present constantly on the same place, so it is possible to claim the sub-bottom fluid escape theory. The paper shows connection between bottom structures and grifon activity via satellite images (spatial-time grouping of oil slicks) of 2011–2019.

scholarly journals STRIKE-SLIP FAULT IDENTIFICATION BENEATH OF THE WIRIAGAR OIL FIELD

2018 ◽  
Vol 40 (3) ◽  
pp. 133-144
Author(s):  
Accep Handyarso ◽  
H.M. Saleh H.M. Saleh
Keyword(s):  
Oil And Gas ◽  
Gravity Data ◽  
Production Capacity ◽  
Strike Slip ◽  
Oil Field ◽  
Strike Slip Fault ◽  
Geological Structures ◽  
Seismic Section ◽  
Section Data ◽  
Eastern Indonesia

The oil and gas explorations in the Eastern Indonesia is still lagging behind the Western Indonesia. The complexity of the geological structures and the geographical conditions caused Eastern Indonesia become virgin areas which commonly known as the frontier areas, such that the cost and risks of the oil and gas explorations become higher. Wiriagar Field is the only oil production fi eld in the Bintuni Basin with signifi cant production capacity. The search for new oil and gas location can use the analogy of the existing oil and gas fi elds. Thus the pattern of subsurface geological structures beneath the Wiriagar Field can be used as a template (key) in the search for new oil and gas fi eld in the Bintuni Basin. Analysis of the subsurface geological structures in the Wiriagar area conducted based on the gravity data with seismic and exploration well data as the constraints. There is an indication of the left-lateral strike-slip fault existence with SW-NE direction intersecting the anticline ridge with NW-SE alignment. The strike-slip fault then verifi ed through seismic section data. This structure pattern is suspected to infl uence the trap of the hydrocarbon which allows the migration from PreKais Formation to the Reservoir of Kais Formation beneath the Wiriagar Oil Field.

scholarly journals Clinical Implications of Power Toothbrushing on Fluoride Delivery: Effects on Biofilm Plaque Metabolism and Physiology

2010 ◽  
Vol 2010 ◽  
pp. 1-7 ◽  
Author(s):  
M. Aspiras ◽  
P. Stoodley ◽  
L. Nistico ◽  
M. Longwell ◽  
M. de Jager
Keyword(s):  
Fluid Dynamic ◽  
Major Constituent ◽  
Acid Fermentation ◽  
Additional Mechanism ◽  
Dynamic Activity ◽  
Enamel Demineralization ◽  
Sucrose Fermentation ◽  
Metabolic Activities ◽  
Sucrose Utilization ◽  
Subsequent Addition

Dental biofilms are implicated in the formation of caries and periodontal disease. A major constituent of the supragingival biofilm isStreptococcus mutans, which produces lactic acid from sucrose fermentation, enhancing enamel demineralization and eventual caries development. Caries prevention through F inhibits enamel demineralization and promotes remineralization. Fluoride also exerts effects on metabolic activities in the supragingival biofilm such as aerobic respiration, acid fermentation and dentrification. In experimentalS. mutansbiofilms, adding 1000 ppm F to an acidogenic biofilm resulting from 10% sucrose addition increased pH to pre-sucrose levels, suggesting inhibition of acid fermentation. F effects on metabolic activity and sucrose utilization in interproximal plaque biofilms were also recorded. Addition of 10% sucrose reduced pH from neutral to 4.2, but subsequent addition of 1000 ppm F increased pH by 1 unit, inhibiting acid fermentation. 10% Sucrose addition also stimulated denitrification, increasing production of nitrous oxide (N2O). Addition of 1000 ppm F suppressed denitrification, indicating an additional mechanism by which F exerts effects in the active interproximal biofilm. Finally, fluid dynamic activity by power tooth brushing enhanced F delivery and retention in an experimentalS. mutansbiofilm, suggesting a potential novel benefit for this intervention beyond mechanical plaque removal.

scholarly journals A New Statistical Modeling Approach to Ocean Front Detection from SST Satellite Images

2010 ◽  
Vol 27 (1) ◽  
pp. 173-191 ◽  
Author(s):  
Jo Hopkins ◽  
Peter Challenor ◽  
Andrew G. P. Shaw
Keyword(s):  
Statistical Modeling ◽  
Satellite Images ◽  
Model Fitting ◽  
Global Ocean ◽  
Gaussian Kernel ◽  
Dynamic Activity ◽  
Ocean Fronts ◽  
Modeling Approach ◽  
Variable Nature ◽  
Front Detection

Abstract Ocean fronts are narrow zones of intense dynamic activity that play an important role in global ocean–atmosphere interactions. Owing to their highly variable nature, both in space and time, they are notoriously difficult features to adequately sample using traditional in situ techniques. In this paper, the authors propose a new statistical modeling approach for detecting and monitoring ocean fronts from Advanced Very High Resolution Radiometer (AVHRR) SST satellite images that builds on a previous “front following” algorithm. Weighted local likelihood is used to provide a smooth, nonparametric description of spatial variations in the position, mean temperature, width, and temperature change of an individual front within an image. Weightings are provided by a Gaussian kernel function whose width is automatically determined by likelihood cross-validation. The statistical model fitting approach allows estimation of the uncertainty of each parameter to be quantified, a capability not possessed by other techniques. The algorithm is shown to be robust to noise and missing data in an image, problems that hamper many of the existing front-detection schemes. The approach is general and could be used with other remotely sensed datasets, model output, or data assimilation products.

scholarly journals GEODYNAMICS

GEODYNAMICS ◽  
2011 ◽  
Vol 2(11)2011 (2(11)) ◽  
pp. 89-91
Author(s):  
G. Ivanchenko ◽  
◽  
E. M. Horbunova ◽  
Keyword(s):  
East European Platform ◽  
Satellite Images ◽  
Sedimentary Cover ◽  
Crystalline Basement ◽  
Geophysical Data ◽  
East European ◽  
Neotectonic Activity ◽  
Automated Interpretation ◽  
Basement Structures ◽  
The Relationship

The relationship between the structures of the crystalline basement, structures of the sedimentary cover and relief of the day surface was traced on the basis of the geological and geophysical data and the results of visual and automated interpretation of the satellite images of the central part of East European Platform. Completed research allowed to determine the extent of the neotectonic activity of morphostructures influencing at the formation of the geophysical fields.

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