Results 281 to 290 of about 136,659 (315)
Some of the next articles are maybe not open access.
International Journal of Foundations of Computer Science, 2007
In this paper we study a generalization of the classical notions of bordered and unbordered words, motivated by DNA computing. DNA strands can be viewed as finite strings over the alphabet {A, G, C, T}, and are used in DNA computing to encode information. Due to the fact that A is Watson-Crick complementary to T and G to C, DNA single strands that are
Kari, Lila, Mahalingam, Kalpana
openaire +2 more sources
In this paper we study a generalization of the classical notions of bordered and unbordered words, motivated by DNA computing. DNA strands can be viewed as finite strings over the alphabet {A, G, C, T}, and are used in DNA computing to encode information. Due to the fact that A is Watson-Crick complementary to T and G to C, DNA single strands that are
Kari, Lila, Mahalingam, Kalpana
openaire +2 more sources
2011
A square involution is a square permutation which is also an involution. The authors prove that the number of square involutions of length \(n\) is \[ (n+2)2^{n-3}-(n-2)\binom{n-3}{\lfloor \frac{n-3}{2}\rfloor},n\geq 3. \]
F. Disanto, FROSINI, ANDREA, S. Rinaldi
openaire +4 more sources
A square involution is a square permutation which is also an involution. The authors prove that the number of square involutions of length \(n\) is \[ (n+2)2^{n-3}-(n-2)\binom{n-3}{\lfloor \frac{n-3}{2}\rfloor},n\geq 3. \]
F. Disanto, FROSINI, ANDREA, S. Rinaldi
openaire +4 more sources
Optics Letters, 2004
We report the design and testing of a circular involute stage for high-repetition-rate (hundreds of hertz), fine temporal resolution (better than 10 fs), and long delay range (as great as nanoseconds) time-resolved optical experiments. This stage uses a reflector with the involute profile of a circle as well as a pair of optical mirrors mounted upon a ...
Jingzhou, Xu, X C, Zhang
openaire +2 more sources
We report the design and testing of a circular involute stage for high-repetition-rate (hundreds of hertz), fine temporal resolution (better than 10 fs), and long delay range (as great as nanoseconds) time-resolved optical experiments. This stage uses a reflector with the involute profile of a circle as well as a pair of optical mirrors mounted upon a ...
Jingzhou, Xu, X C, Zhang
openaire +2 more sources
Involutional melancholia revisited
American Journal of Psychiatry, 1984In this study, 31 patients with involutional-onset major depression had significantly more somatization and hypochondriasis and less loss of libido, guilt, suicidal intent, and family history of depression than 60 patients with an earlier onset. Regardless of age at onset, patients over age 50 had more agitation, initial insomnia, and hypochondriasis ...
R P, Brown +4 more
openaire +2 more sources
The Mathematical Gazette, 1953
It is a sound principle in teaching that we should begin by saying what a thing is, rather than what it is not, but the reader of the Gazette is not coming across the word involution for the first time, anti the best serrice I can render him is to insist at the outset that involution is not a
openaire +1 more source
It is a sound principle in teaching that we should begin by saying what a thing is, rather than what it is not, but the reader of the Gazette is not coming across the word involution for the first time, anti the best serrice I can render him is to insist at the outset that involution is not a
openaire +1 more source
Programming and Computer Software, 2004
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire +2 more sources
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire +2 more sources