A. V. Puchkov,1 M. C. Schabel,1 D. N. Basov,2 T. Startseva,3 G. Cao,4 T. Timusk,3 and Z.-X. Shen1 1Department of Applied Physics, Stanford University, Stanford, California 94305-4045 2Department of Physics, University of California at San Diego, La Jolla, California 92093-0319 3Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, Canada L8S4M1 4National High Magnetic Fie...

The genesis of this paper is the construction of a new operator that, when combined with a theorem of Herrero, settles a question of Herrero. Herrero proved that a strictly cyclic operator on an infinite dimensional Hilbert space is never triangular. He later asks whether the adjoint of a strictly cyclic operator is necessarily triangular. We settle the question by constructing an operator T fo...

Using ion-exchange chromatography, we have identified and isolated two forms of a cyclic GMPspecific binding activity in filter-broken cell extracts of Dictyostelium discoideum. Upon addition of excess cold ligand, one form (S-type) released bound H-labelled cyclic GMP very slowly (fj ~ 68 min), while the other form (F-type) released the cyclic GMP in <1 min. After photoaffinity labelling with ...

Amoebae of Dictyostelium discoideum respond to a chemotactic cyclic AMP stimulus within 10 s by the formation of an intracellular peak of cyclic GMP. In wild-type cells the cyclic GMP is rapidly degraded by a cyclic GMP-specific phosphodiesterase. In "streamer F" mutants this enzyme structural gene, and the cyclic GMP persists several times longer than the normal period, an effect that is corre...

A modified procedure for purification of the adenosine 3’,5’-monophosphate-dependent (cyclic AMP-dependent) protein kinase from rabbit skeletal muscle is described. This procedure results in the separation of the enzyme into two peaks of activity on diethylaminoethylcellulose. No interconversion of these two peaks was observed. Both peaks exhibit dependence on cyclic AMP, but under certain cond...

We present several constructions for terraces for cyclic groups that are zigzag terraces, graceful terraces or both. These allow us to complete the classification of imperfect twizzler terraces, unify several previously unrelated constructions of terraces from the literature, find terraces for some non-cyclic abelian groups, and show that for any given r the Oberwolfach Problem with parameters ...

Let $R\ $be a commutative ring with $1\neq0$ and $M$ be an $R$-module. Suppose that $S\subseteq R\ $is multiplicatively closed set of $R.\ $Recently Sevim et al. in \cite{SenArTeKo} introduced the notion $S$-prime submodule which is generalization prime used them to characterize certain classes rings/modules such as submodules, simple modules, torsion free modules,\ $S$-Noetherian modules etc. ...

In this paper we show that periodic Takahashi 3-manifolds are cyclic coverings of the connected sum of two lens spaces (possibly cyclic coverings of S), branched over knots. When the base space is a 3-sphere, we prove that the associated branching set is a two-bridge knot of genus one, and we determine its type. Moreover, a geometric cyclic presentation for the fundamental groups of these manif...

Kodlama teorisinde, lineer kodların özel bir sınıfı olan devirli kodlar ile ilgili araştırmalar büyük ilgi görmektedir. Bu ilginin en önemli nedenlerinden bazıları zengin cebirsel özelliklere sahip olmaları, birçok uygulama alanlarının bulunması, kodlama ve kod çözmede kolaylık sağlamaları olarak sayılabilir. Devirli sabit-devirli, parçalı yarı burmalı kodlargibi genellemeleri bulunmaktadır. ge...