The research on pattern-avoidance has yielded so far limited knowledge on Wilf-ordering of permutations. The Stanley-Wilf limits limn→∞ n √ |Sn(τ )| and further works suggest asymptotic ordering of layered versus monotone patterns. Yet, Bóna has provided essentially the only known up to now result of its type on ordering of permutations: |Sn(1342)| < |Sn(1234)| < |Sn(1324)| for n ≥ 7. We give a...

The research on pattern-avoidance has yielded so far limited knowledge on Wilfordering of permutations. The Stanley-Wilf limits limn→∞ n √ |Sn(τ)| and further works suggest asymptotic ordering of layered versus monotone patterns. Yet, Bóna has provided essentially the only known up to now result of its type on complete ordering of Sk for k = 4: |Sn(1342)| < |Sn(1234)| < |Sn(1324)| for n ≥ 7, al...

Goeie kommunikasie is die hoeksteen van die verpleegberoep. Aan die hand van gevalle illustreer die skrywer dat die kind veral gevoelig is vir ’n gebrek aan kommunikasie en dat 'n spesiale poging dus aangewend moet word. Hospitalisasie en veral die skeiding van sy moeder het ’n intense invloed op die kind en sy reaksies hang van verskeie faktore af. Om te voorkom dat die hospitaalervaring horn ...

We have observed a sample of Seyfert (Sy) galaxies with the global Very Long Baseline Interferometry (VLBI) to test the predictions of the unification scheme for the Sy galaxies which hypothesises that Sys of Type 1 and of Type 2 constitute a single population of objects. If Sy 1 and Sy 2 galaxies differ only in the orientation of the axisymmmetric active nucleus with respect to the observer, t...

We would like to correct the last name of first author as shown below. Change is marked by underline. The authors regret this error.

Year-class differences in reproductive function were investigated in a free-living population of adult male Dark-eyed Juncos, Junco hyemalis, breeding in interior Alaska. Second-year males (SY, entering their first breeding season) were compared with after-second-year males (ASY, entering at least their second breeding season). We measured body mass, size of the cloacal protuberance (CP), testi...

(Dual-)promotion and (dual-)evacuation are bijections on SY T (λ) for any partition λ. Let cr denote the rectangular partition (c, . . . , c) of height r, and let sck (k > 2) denote the staircase partition (k, k−1, . . . , 1). We demonstrate a promotionand evacuation-preserving embedding of SY T (sck) into SY T (k k+1). We hope that this result, together with results by Rhoades on rectangular t...