Commingled Fluids in Abandoned Boreholes: Proximity Analysis of a Hidden Liability

Ground Water ◽  
2021 ◽  
Author(s):  
Christopher Perra ◽  
Jennifer C. McIntosh ◽  
Theresa Watson ◽  
Grant Ferguson
Keyword(s):  
Proximity Analysis

IDENTIFYING THE MOST SUITABLE AREAS FOR SURFACE FLOW WETLAND CONSTRUCTION IN LITHUANIA

2015 ◽  
Author(s):  
Antanas DUMBRAUSKAS ◽  
Nijolė BASTIENĖ ◽  
Petras PUNYS
Keyword(s):  
Constructed Wetlands ◽  
Ecological Status ◽  
Surface Flow ◽  
Gis Analysis ◽  
Proximity Analysis ◽  
Wetland Construction ◽  
The Mean ◽  
Two Phases ◽  
Terrain Features ◽  
Surface Flow Constructed Wetlands

GIS-based approach to find the suitable sites for surface flow constructed wetlands was employed for the Lithuanian river basins with low ecological status. According to the nature of the analysed criteria the flowchart consists of two phases. Criteria used include hydrographical network, soil properties, terrain features, land use, etc. Some of them have strictly defined values (constraints), and other ranges within certain limits (factors). Limited criteria were analysed using rejection principle and influencing factors using proximity analysis and overlay methods. Selecting the potential sites using standard GIS analysis tools there was estimated about 3286 sites for possible wetlands with the mean area of inflow basin about 4 km2 in the basins of water bodies at risk.

Archaeological Applications of Factor, Cluster, and Proximity Analysis

1968 ◽  
Vol 33 (3) ◽  
pp. 367-375 ◽  
Author(s):  
George L. Cowgill
Keyword(s):  
Sufficient Condition ◽  
Proximity Analysis ◽  
La Tène ◽  
La Tene ◽  
Teotihuacan Mexico ◽  
Better Than

AbstractAn effort is made to give readers a good idea of what the techniques of factor, cluster, and proximity analyses are; of what are their good features and their limitations; and where one should look for further information. Archaeological uses of these techniques which are discussed include those of Hodson on La Tene brooches and on Mousterian assemblages, L. and S. Binford on Mousterian assemblages, Freeman and Brown on the Carter Ranch Pueblo, and the author on data from Teotihuacan, Mexico. The dangers of using correlations based on inadequate samples are stressed, and one necessary (though not sufficient) condition for sample adequacy is suggested. It is argued that proximity analysis, among other applications, is probably better than the Brainerd-Robinson approach for seriation.

scholarly journals Emergence of the Ug99 lineage of the wheat stem rust pathogen through somatic hybridisation

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Feng Li ◽  
Narayana M. Upadhyaya ◽  
Jana Sperschneider ◽  
Oadi Matny ◽  
Hoa Nguyen-Phuc ◽  
...  
Keyword(s):  
Stem Rust ◽  
Wheat Stem Rust ◽  
Haploid Nucleus ◽  
Somatic Hybridisation ◽  
Global Food Security ◽  
Proximity Analysis ◽  
Rust Pathogen ◽  
Fungal Populations ◽  
Nuclear Exchange ◽  
Global Food

Abstract Parasexuality contributes to diversity and adaptive evolution of haploid (monokaryotic) fungi. However, non-sexual genetic exchange mechanisms are not defined in dikaryotic fungi (containing two distinct haploid nuclei). Newly emerged strains of the wheat stem rust pathogen, Puccinia graminis f. sp. tritici (Pgt), such as Ug99, are a major threat to global food security. Here, we provide genomics-based evidence supporting that Ug99 arose by somatic hybridisation and nuclear exchange between dikaryons. Fully haplotype-resolved genome assembly and DNA proximity analysis reveal that Ug99 shares one haploid nucleus genotype with a much older African lineage of Pgt, with no recombination or chromosome reassortment. These findings indicate that nuclear exchange between dikaryotes can generate genetic diversity and facilitate the emergence of new lineages in asexual fungal populations.

Texture Discrimination and the Analysis of Proximity

Perception ◽  
1979 ◽  
Vol 8 (1) ◽  
pp. 75-91 ◽  
Author(s):  
John Fox ◽  
John E W Mayhew
Keyword(s):  
Visual Processing ◽  
Additional Data ◽  
Analysis Model ◽  
Texture Discrimination ◽  
Proximity Analysis ◽  
Visual Processes ◽  
Early Visual Processing ◽  
Satisfactory Account ◽  
Symmetry Perception ◽  
New Phenomena

A major theory of early visual processing has recently been proposed by Marr, which considers a number of aspects of visual perception in great detail, including grouping and texture discrimination. New phenomena associated with texture discrimination are described and experiments reported which allow a preliminary comparison of Marr's theory, as it applies to texture discrimination, with more established theories such as that due to Julesz. One experiment produced results which are clearly consistent with Marr's account, but the ability of his theory to deal with additional data on region suppression is not established. The theory of the analysis of proximity relations proposed by Fox offers a broadly satisfactory account of many texture perception results, while relying on the more fundamental parts of Marr's theory of primitive visual processes to deal with the remainder. A further attraction of proximity analysis is that it may shed new light on the classical paradox of symmetry perception. Some ways in which the preliminary proximity analysis model is incomplete are discussed, and it is concluded that development of the model may be profitable for theories of early visual processing.

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