In this paper, we describe some techniques to learn probabilistic k-testable tree models, a generalization of the well known k-gram models, that can be used to compress or classify structured data. These models are easy to infer from samples and allow for incremental updates. Moreover, as shown here, backing-off schemes can be defined to solve data sparseness, a problem that often arises when u...

There are many ways to encode, represent, and compress satellite images. Today, with the huge technological advance, algorithms are used to perform many calculations to compress and decompress a satellite image. The future of the compression can take place only through mathematical algorithms, and the progress of mathematical research undoubtedly will lead to an advance in image and file compre...

This paper presents the comparison of compression algorithms for voice transferring method over SMS in satellite communication. Voice transferring method over SMS is useful in situations when signal strength is low and due to poor signal strength voice call connection is not possible to initiate or signal dropped during voice call. This method has one serious flaw that it produces large number ...

The association mining is one of the primary sub-areas in the field of data mining. This technique had been used in numerous practical applications, including consumer market basket analysis, inferring patterns from web page access logs, network intrusion detection and pattern discovery in biological applications. Most of the traditional association-mining algorithms assume that whole dataset c...

An extensive set of experiments was performed to test the performance of the onboard compression algorithm created for ACS by R. White. We determined the compression factor for realistic simulated images of different astronomical targets as well as of STIS images and ACS darks and flat fields. We present the results of such experiments and our recommendations for the compression settings of pri...

We compress phase-shift digital holograms (whole Fresnel fields) for the transmission of three-dimensional images. For real-time networking applications, the time required to compress can be as critical as the compression rate. We achieve lossy compression through quantization of both the real and imaginary streams, followed by a bit packing operation. Compression losses in the reconstructed ob...

Efficient processing of tera-scale text data is an important research topic. This paper proposes lossless compression of N gram language models based on LOUDS, a succinct data structure. LOUDS succinctly represents a trie with M nodes as a 2M + 1 bit string. We compress it further for the N -gram language model structure. We also use ‘variable length coding’ and ‘block-wise compression’ to comp...

The interclinoid ligaments between the anterior, middle and posterior clinoid process are occasionally ossified. A bony bridge between the anterior and middle clinoid process and another between the anterior and posterior clinoid process was found in a dry specimen of one adult sphenoid bone. It was found bilaterally, like a ring around the sella turcica. The occasional presence of this ossifie...