The Burrows-Wheeler transform is a block-sorting algorithm which has been shown empirically to be useful in compressing text data. In this paper we study the output distribution of the transform for i.i.d. sources, tree sources and stationary ergodic sources. We can also give analytic bounds on the performance of some universal compression schemes which use the Burrows-Wheeler transform.

background: the aim of this study was to determine intestinal and liver helminth infections in rattus rodents in tehran iran. methods: overall, 306 traps were put in 39 different regions in tehran from 2009 to 2010. rodents, including r. rattus and r. norvegicus were caught by live-traps.they become unconscious and the spinal cords were cut, afterwards the body was dissected and the stomach, sm...

Ecosystem engineers affect other species by changing physical environments. Such changes may influence movement of organisms, particularly belowground where soil permeability can restrict dispersal. We investigated whether earthworms, iconic ecosystem engineers, influence microarthropod movement. Our experiment tested whether movement is affected by tunnels (i.e., burrows), earthworm excreta (m...

Temperature and respiratory gas (CO2 and O2) concentrations were measured in the foraging tunnels of burrows naturally inhabited by two species of southern African mole-rats, the Cape mole-rat Georhychus capensis and the Damaraland mole-rat Cryptomys damarensis. Both species are completely fossorial and inhabit closed burrow systems. Tunnels of G. capensis burrows had a mean diameter of 8.7 cm ...

a general rodent control program was carried out in bandar abbas in the persian gulf (15 sep-22 oct 1984). researches on the variety of the rodents and their parasites were done and zincphosphide and comatetralil baits were used for in-doors and out-doors. results obtained showed that these campaigns were successful.

background : this study was aimed to collect wild rodents for endoparasites determination in some parts of sistan and baluchistan province, southeastern iran nearby pakistan and afghanistan countries. methods : a total of 100 wild rodents were captured alive with cage traps. various samples were collected from blood and feces, also impression smear prepared from different organs. the samples we...

ectoparasites are considered as the main vectors of zoonotic diseases. they play an important role for transmission of wide variety of diseases such as cchf, leishmaniosis and plague to human and vertebrates. mammals, especially rodents, are the most important reservoirs of zoonotic diseases. the aim of this study was to identify the ectoparasites of rodents captured in korram-abad, lurestan pr...

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