Plasma and kidney renin activities (PRA, KRA) were determined in male spontaneously hypertensive rats (SHR), the inbred strain of F27-30. Blood samples of 0.5 ml for PRA determination were obtained through a cannula inserted into the abdominal aorta without anesthesia to minimize renin release from the kidney. The PRA was 30 wk. The KRA of SHR at age 10, 20, and 30 wk was also lower, confirming...

We find a one to one correspondence between quadratic APN functions without linear and constant terms and a special kind of matrices (We call such matrices as QAMs). Based on the nice mathematical structures of the QAMs, we have developed efficient algorithms to construct quadratic APN functions. On F27 , we have found more than 470 classes of new CCZ-inequivalent quadratic APN functions, which...

Recently we proposed a novel method of alignment-alignment comparison, COMPASS (the tool for COmparison of Multiple Protein Alignments with Assessment of Statistical Significance). Here we present several examples of the relations between PFAM protein families that were detected by COMPASS and that lead to the predictions of presently unresolved protein structures. We discuss relatively straigh...

It is well known that almost perfect nonlinear (APN) functions achieve the lowest possible differential uniformity for functions defined on fields with even characteristic, and hence, from this point of view, they are the most ideal choices for S-boxes in block and stream ciphers. They are also interesting as the link to many other areas, for instance topics in coding theory and combinatorics. ...

Recent welfare reform legislation requires increased parental work effort and imposes time limits on the receipt of federal assistance. These changes were based in part on assumptions that parental welfare receipt may be negatively related to family processes and children's attitudes and behaviors. Currently, researchers know little about the effects of welfare by itself relative to the effects...

In August 1996, Congress and the president replaced the 60-year-old Aid to Families with Dependent Children (AFDC) program with a block grant, Temporary Assistance to Needy Families (TANF), permitting states to experiment with new forms of assistance to low-income families. States seem likely to try increasingly ambitious reforms as they gain experience under their TANF flexibility, at least if...

A series of researches related to aluminium-steel plating by press welding are presented in the paper. In this sense, influence roughness aluminium and steel test samples was taken into account, but also post-welding heat treatment on characteristics joints made. S355 specimens AlMgSi0.7 F27 were analyzed. The processed Ra = 2.51-51.09 µm obtained. Also, after making joints, a postwelding appli...