Effect of the SRTM global DEM on the determination of a high-resolution geoid model: a case study in Iran

2005 ◽  
Vol 79 (9) ◽  
pp. 540-551 ◽  
Author(s):  
R. Kiamehr ◽  
L. E. Sjöberg
Keyword(s):  
High Resolution ◽  
Geoid Model

scholarly journals The measurement and interpretation methodology of resistivity logs affected by the Groningen effect – a Polish case study

2020 ◽  
Vol 46 (1) ◽  
pp. 35
Author(s):  
Stanislaw Baudzis ◽  
Jadwiga A. Jarzyna ◽  
Edyta Puskarczyk
Keyword(s):  
High Resolution ◽  
Reference Electrode ◽  
Well Log ◽  
Standard Measurement ◽  
Resistivity Data ◽  
Resistivity Logs ◽  
History Of ◽  
Formation Resistivity

True formation resistivity Rt measurement is one of the fundamental logs in the calculation of hydrocarbon resources. That is why it is very important to have the most reliable resistivity data possible. In this paper, the various outcomes obtained by Polish well log analysts and engineers for the proper determination of hydrocarbon saturation in the Main Dolomite deposits in the Polish Lowland are presented. The long history of efforts directed to make proper exploitation decisions in wells where the Groningen effect has been observed is illustrated, starting with the standard measurement and interpretational approach, through the modified construction of a reference electrode in a Laterolog device and ending with an examination of HRLA (High-Resolution Laterolog Array) or Array Compensated Resistivity Tool) ACRt results. The processing of resistivity logs with the special Poprawki software is included.

scholarly journals Determination of rice canopy growth based on high resolution satellite images: a case study using RapidEye imagery in Korea

2016 ◽  
Vol 3 (4) ◽  
pp. 631-645 ◽  
Author(s):  
Mijeong Kim ◽  
◽  
Seungtaek Jeong ◽  
Jong-min Yeom ◽  
Hyun-ok Kim ◽  
...  
Keyword(s):  
High Resolution ◽  
Satellite Images ◽  
High Resolution Satellite Images

Environmental Soil and Ground Water Assessment Using High Resolution Passive Soil-Gas Samplers - Petrex Method: Methodology and Results of a Case Study Performed in Brazil

1994 ◽  
Vol 29 (8) ◽  
pp. 161-172 ◽  
Author(s):  
D. C. Gomes ◽  
M. Alarsa ◽  
M. C. Salvador ◽  
C. Kupferschmid
Keyword(s):  
High Resolution ◽  
High Resolution Mass Spectrometry ◽  
Cost Effective ◽  
Site Investigation ◽  
Soil Gas ◽  
Environmental Evaluation ◽  
Direct Sampling ◽  
Selection Of

The PETREX Passive Soil Gas Technique - applied successfully to environmental projects for 10 years - is the ideal primary investigative tool for soil and groundwater contaminations, since it is rapid, easy to apply and covers large areas. It is more sensitive and cost effective than other methods (e.g. active soil gas techniques). Passive collectors combined with high-resolution mass spectrometry permit direct mid reliable identification of over 9,000 volatile (VOCs) and semi-volatile organic compounds (SVOCs). PETREX is capable of providing comprehensive problem delineation during the initial stages of the site investigation, allowing for greater cost effectiveness in the planning of remediation programs and in the selection of appropriate monitoring well locations and other methodologies which may be needed to complete the environmental evaluation. PETREX therefore finds wide use in the investigation of contaminants, in the determination of pollution sources, as well as in audits connected to real estate transactions. This paper describes a case-study developed in Brazil, showing PETREX's usefulness and its correlation with soil and groundwater contamination plumes established from traditional direct sampling methods.

scholarly journals THE USE OF HIGH RESOLUTION IMAGES TO EVALUATE THE EVENT OF FLOODS AND TO ANALYSIS THE RISK REDUCTION CASE STUDY: KAMPUNG PULO, JAKARTA

2017 ◽  
Vol 11 (2) ◽  
pp. 127
Author(s):  
M. Rokhis Khomarudin ◽  
. Suwarsono ◽  
Dini Oktavia Ambarwati ◽  
Gunawan Prabowo
Keyword(s):  
High Resolution ◽  
Risk Reduction ◽  
Aerial Photography ◽  
Risk Level ◽  
Vertical Evacuation ◽  
Aerial Vehicle ◽  
High Resolution Images ◽  
Evacuation Plan

The flood hit Kampung Pulo region in almost every year. This disaster has caused the evacuation of some residents in weeks. Given the frequency of occurrence is quite high in the region it is necessary to do a study to support disaster risk reduction. This study aimed to evaluate the incidence of flooding that occurred in Kampung Pulo in terms of topography, river conditions, characteristics of the building, and socioeconomic conditions. Methods of study include geomorphology analysis, identification of areas of stagnant, the estimated number of people exposed, the estimation of socio-economic conditions of the population, as well as determining the location of an evacuation. The data used is high-resolution remote sensing imagery is QuickBird and SPOT-6. It also used the results of aerial photography using Unmanned Aerial Vehicle (UAV). Aerial photography was conducted on January 18, 2013, which is when the serious flooding that inundated almost the entire region of Kampung Pulo. Information risk level of buildings and population resulting from this study were obtained by using GIS. The results obtained from this study can be used to develop recommendations and strategies for flood mitigation in Kampung Pulo, Jakarta. One of them is the determination of the location for vertical evacuation plan in the affected areas.

High-resolution microscopy of twin boundaries in gold

1987 ◽  
Vol 45 ◽  
pp. 260-261
Author(s):  
William Krakow ◽  
David A. Smith
Keyword(s):  
High Resolution ◽  
Specimen Preparation ◽  
Gold Films ◽  
Boundary Area ◽  
Transmission Electron ◽  
Recent Developments ◽  
Tilt Boundaries ◽  
High Resolution Microscopy ◽  
Twist Boundaries

Recent developments in specimen preparation, imaging and image analysis together permit the experimental determination of the atomic structure of certain, simple grain boundaries in metals such as gold. Single crystal, ∼125Å thick, (110) oriented gold films are vapor deposited onto ∼3000Å of epitaxial silver on (110) oriented cut and polished rock salt substrates. Bicrystal gold films are then made by first removing the silver coated substrate and placing in contact two suitably misoriented pieces of the gold film on a gold grid. Controlled heating in a hot stage first produces twist boundaries which then migrate, so reducing the grain boundary area, to give mixed boundaries and finally tilt boundaries perpendicular to the foil. These specimens are well suited to investigation by high resolution transmission electron microscopy.

High-Resolution Image Simulation of a Tilted Crystal

1990 ◽  
Vol 48 (1) ◽  
pp. 68-69
Author(s):  
C. J. D. Hetherington
Keyword(s):  
High Resolution ◽  
Crystal Thickness ◽  
Thin Specimen ◽  
Atomic Structures ◽  
Kikuchi Lines ◽  
High Resolution Images ◽  
Final Estimate ◽  
Simulated Images ◽  
Habit Planes

Most high resolution images are not directly interpretable but must be compared with simulations based on model atomic structures and appropriate imaging conditions. Typically, the only parameters that are adjusted, in addition to the structure models, are crystal thickness and microscope defocus. Small tilts of the crystal away from the exact zone axis have only rarely been considered. It is shown here that, in the analysis of an image of a silicon twin intersection, the crystal tilt could be accurately estimated and satisfactorily included in the simulations.The micrograph shown in figure 1 was taken as part of an HREM study of indentation-induced hexagonal silicon. In this instance, the intersection of two twins on different habit planes has driven the silicon into hexagonal stacking. However, in order to confirm this observation, and in order to investigate other defects in the region, it has been necessary to simulate the image taking into account the very apparent crystal tilt. The inability to orientate the specimen at the exact [110] zone was influenced by i) the buckling of the specimen caused by strains at twin intersections, ii) the absence of Kikuchi lines or a clearly visible Laue circle in the diffraction pattern of the thin specimen and iii) the avoidance of radiation damage (which had marked effects on images taken a few minutes later following attempts to realign the crystal.) The direction of the crystal tilt was estimated by observing which of the {111} planes remained close to edge-on to the beam and hence strongly imaged. Further refinement of the direction and magnitude of the tilt was done by comparing simulated images to experimental images in a through-focal series. The presence of three different orientations of the silicon lattice aided the unambiguous determination of the tilt. The final estimate of a 0.8° tilt in the 200Å thick specimen gives atomic columns a projected width of about 3Å.

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