-Digital watermarking is a technique of embedding pieces of information into digital data such as text, audio, video, and still images that can be detected or extracted later to show authentication about the data. Watermark is hidden information in the image(s) and is so designed that it does not degrade/distort the quality of the image and still keeps the information. Digital watermarking is b...

We design a systolic coprocessor for the addition of signed normalized rational numbers. This is the most complicated rational operation: it involves GCD, exact division, multiplication and addi-tion/subtraction. In particular, the implementation of GCD and exact division improve signiicantly (2 to 4 times) previously known solutions. In contrast to the traditional approach, all operations are ...

retinoids with a tetrahydronaphthalene structure (Fig. 1), was synthesized using an NaHSO3 addition product of 5,6,7,8tetrahydro-5,5,8,8-tetramethyl-2-naphthalene-carboxaldehyde (compound I) as a starting material, which was prepared as described.1 The condensation of compound I and 4-ethylamino3-amino-ethylbenzoate (mp: 73 ̊C) in DMF for 70 h gave the title compound (recrystallized from hexane/...

This paper describes some techniques for optimizing software implementations of E2 on various platforms. It is relatively easy to implement a byte-oriented cipher such as E2 on an 8-bit processor, but it is difficult to implement it efficiently on a 32-bit processor or a 64-bit processor. In particular, this paper shows some optimization techniques for SPN (Substitution-Permutation Network) on ...

Epithelial cells are major targets of permissive infection by human cytomegalovirus (HCMV) in vivo during acute infection, but little is known about the viral factors that influence the permissiveness of epithelial cells for HCMV. The aim of the present study was to investigate the interleukin-8 (IL-8)-inducing capacities of HCMV clinical isolates of different origins by comparison of the repli...