نتایج جستجو برای: r1 and r4
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The Stern-Brocot tree (or rather half of it) can be defined as follows. Start with two fractions 0/1 and 1/1, forming an ordered set S0. (Throughout this paper, “fraction” means “fraction in lowest terms”.) At stage k, (k = 1, 2, . . .), form a new set Sk by inserting between each pair of adjacent fractions in Sk−1, say p/q and r/s, the fraction (p+r)/(q+s). Name the (ordered) set of fractions ...
Aeropyrum pernix contains one homolog of ribonuclease H (RNase H), A. pernix RNase HII (Ape-RNase HII). Activity characterization showed that Ape-RNase HII exhibited the highest activity in the presence of 5 mM Mn(2+), 1 mM Co(2+), or 10 mM Mg(2+), respectively; however, its cleavage efficiencies at different cleavage sites for Mn(2+) and Mg(2+) were different. Ape-RNase HII cleaved 12-bp RNA/D...
In the internet environment, it is desirable for a user to login different servers by keying the same password and using the same smart card. This paper proposes an authentication and key agreement scheme with key confirmation for multi-server environments. Compared with the previous authentication and key agreement schemes for multi-server environments, the new scheme holds many merits. It sat...
Peptides in an extract of skin from the agnathan Petromyzon marinus (sea lamprey) were purified by reversed-phase high-performance liquid chromatography and characterized by Edman degradation. The primary structure of a cysteine- and arginine-rich peptide (termed lamprey corticostatin-related peptide [LCRP]) was established as Cys-Pro-Cys-Gly-Arg-Arg-Arg-Cys-Cys-Val-Arg-Gly-Leu-Asn-Val-Tyr-Cys-...
The insect central complex and vertebrate basal ganglia are forebrain centres involved in selection and maintenance of behavioural actions. However, little is known about the formation of the underlying circuits, or how they integrate sensory information for motor actions. Here, we show that paired embryonic neuroblasts generate central complex ring neurons that mediate sensory-motor transforma...
This research makes use of a large sample of individual telephone calls between local exchanges (cities, towns, villages) within a U.S. region. The interlocational flows, measured in conversation seconds, are analyzed by estimating, in a simultaneous equation framework, spatial interaction models that account for (1) the role of the spatial structure, which reflects the competition and agglomer...
CD200Fc, a chimeric molecule including the extracellular domain of CD200 and a murine IgG2a Fc region, regulates immune responses following engagement of a cell surface receptor, CD200R, expressed on cells of the myeloid and T cell lineage. A recent report focused attention on a family of CD200Rs, but concluded that only one member used CD200 as its ligand. We have also cloned and sequenced a f...
Let p(x) be a polynomial of degree 4 with four distinct real roots r1 < r2 < r3 < r4. Let x1 < x2 < x3 be the critical points of p, and define the ratios σk = xk − rk rk+1 − rk , k = 1, 2, 3. For notational convenience, let σ1 = u, σ2 = v, and σ3 = w. (u, v, w) is called the ratio vector of p. We prove necessary and sufficient conditions for (u, v, w) to be a ratio vector of a polynomial of deg...
In order to apply the Information Bottleneck (IB) to LPADs, the network Gout is the result of the translation of the LPAD for which we want to learn the parameters plus the addition of the Y variable. The set of hidden variables contains the vector of the choice variables CH plus those atoms that are unobserved in the data, let us call them T. With X we indicate the set of atom variables that a...
This document contains the responses to the T10 Letter Ballot comments on forwarding SAM-2 to first public review. The summary of the T10 Letter Ballot results can be found in 02-123r1. All references to SAM-2 PDF pages are based on sam2r23.pdf. r0 All comments from 02-123r1 included. Some comments noted for discussion during the May T10 meeting week. Many comments unprocessed. r1 Resolutions o...
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