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Abstract The authors propose a new climatic drought index: the standardized precipitation evapotranspiration index (SPEI). The… Expand Web search engines use highly optimized compression schemes to decrease inverted index size and improve query throughput, and… Expand Most tasks require a person or an automated system to reason -- to reach conclusions based on available information. The… Expand The technology underlying text search engines has advanced dramatically in the past decade. The development of a family of new… Expand We examine index representation techniques for document-based inverted files, and present a mechanism for compressing them using… Expand We describe an approach to object and scene retrieval which searches for and localizes all the occurrences of a user outlined… Expand Abstract We evaluated the initial 12 months of vegetation index product availability from the Moderate Resolution Imaging… Expand Two well-known indexing methods are inverted files and signature files. We have undertaken a detailed comparison of these two… Expand This study evaluated the sensitivity of maximum likelihood (ML)-, generalized least squares (GLS)-, and asymptotic distribution… Expand