Results 81 to 90 of about 3,193,900 (299)
A storage and access architecture for efficient query processing in spatial database systems [PDF]
, 1993 Due to the high complexity of objects and queries and also due to extremely large data volumes, geographic database systems impose stringent requirements on their storage and access architecture with respect to efficient query processing.
Kriegel, Hans-Peter +8 more
core +1 more source
Gridvoronoi: An Efficient Spatial Index for Nearest Neighbor Query Processing
IEEE Access, 2019 In this paper, based upon Voronoi Diagram, we propose GridVoronoi which is a novel spatial index that enables users to find the spatial nearest neighbour (NN) from two-dimensional (2D) datasets in almost O(1) time.
Chongsheng Zhang +3 more
doaj +1 more source
Spatial heterogeneity of hotspot mutations and clonal relatedness in ovarian endometrioid carcinoma
Molecular Oncology, EarlyView.Spatially resolved analysis revealed heterogeneous distributions of selected cancer‐associated mutations within ovarian endometrioid carcinomas. Shared mutations between paired endometrial and ovarian tumors supported clonal relatedness. These findings highlight the value of sampling multiple tumor regions when interpreting molecular profiles ...
Takahito Ashihara +10 more
wiley +1 more source
An Efficient Shortest Path Routing Algorithm for Directed Indoor Environments
ISPRS International Journal of Geo-Information, 2018 Routing systems for outdoor space have become the focus of many research works. Such routing systems are based on spatial road networks where moving objects (such as cars) are affected by the directed roads and the movement of traffic, which may include ...
Sultan Alamri
doaj +1 more source
Molecular characterization of covRS mutations in M1UK Streptococcus pyogenes
FEBS Open Bio, EarlyView.Group A Streptococcus (GAS) acquires covRS mutations driving a hypervirulent bacterial state, frequently associated with invasive disease‐like necrotizing fasciitis. We demonstrate that the newly emerged M1UK GAS lineage can also acquire these mutations.
Jarrad Pritchard +12 more
wiley +1 more source
Logical aspects of spatial databases [PDF]
, 2011 Spatial data and first-order logic - Capturing first-order geometric properties - First-order topological properties of plain sets - Conclusion on first-order topological properties - Point-based logics for geometric queries - Plane graphs - Spatial datalog and first-order logic extend with a while-loop - First-order logic extended with transitive ...
KUIJPERS, Bart, VAN DEN BUSSCHE, Jan
openaire +2 more sources
FEBS Open Bio, EarlyView.Hyperosmotic stress triggers the relocation of the CFIm complex from the nucleus to the cytoplasm. This shift creates a nuclear ‘stoichiometric bottleneck’, limiting CFIm availability for mRNA processing. Consequently, specific mRNAs like NUDT21 and DICER1 undergo targeted 3′UTR shortening, demonstrating how spatial protein dynamics drive rapid ...
Hitomi Soumiya +2 more
wiley +1 more source
The representation and management of evolving features in geospatial databases [PDF]
, 2009 Geographic features change over time, this change being the result of some kind of event or occurrence. It has been a research challenge to represent this data in a manner that reflects human perception.
Lohfink, Alex
core
IEEE AccessThe task of building a natural language interface to a database, known as NLIDB, has recently gained significant attention from both the database and Natural Language Processing (NLP) communities.
Samya Acharja, Kanchan Chowdhury
doaj +1 more source
Airborne laser scanning data as a source of field topographical characteristics
Plant, Soil and Environment, 2013 One of the factors frequently affecting yields is topography. Topographic data can be obtained from various sources with different precision. This work evaluates suitability of airborne laser scanning data for use as another source of topographical ...
J. Kumhálová +3 more
doaj +1 more source