To support the recommendation of shifting transienl rnonilori~ig l i w i vvltage surges lo current surges, the paper presents experimental results as well as numerical modeling results demonstrating two mechanisms causing an apparent decrease of surge activity in low-voltage ac power circuits. The first mechanism is the proliferation of surge-protective devices, a situation which is by now well...

In this note all rings are commutat ive rings with identity and all modules are unital. Let R be a commutat ive ring with identity. An R-module M is called a mult ipl icat ion module provided for each submodule N of M there exists an ideal I of R such that N = I M. Various propert ies of mult ipl icat ion modules are considered. If there is a common theme it is that the methods used generalise ...

Let C be an algebraically closed field of positive characteristic p and complete with respect to a non-archimedean absolute value | . | and Λ ⊂ C a discrete Fp-submodule. Suppose there exists an Fp-basis {λ0, λ1, . . .} of Λ such that 0 < |λ0| < |λ1| < · · · and |λi| −→ ∞. For k ∈ N define the meromorphic function Ck,Λ(z) = ∑ λ∈Λ 1 (z − λ)k on C. We show that all the zeroes x of Ck,Λ satisfy (∗...

We initiate the study of 1-torsion of finite modules over two-sided noetherian semiperfect rings. In particular, we give a criterion for determining when the 1-torsion submodule contains minimal generators of the module. We also provide an explicit construction for a projective cover of the submodule generated by the torsion elements in the top of the module. Some of the obtained results hold w...

A new and conceptually simple procedure is derived for the computation of the maximal reachability submodule of a given submodule of the state space of a linear discrete time system over a Noethenian ring R. The procedure is effective if R is effective and if kernels and intersections can be computed. The procedure is compared with a rather different procedure by Assan e.a. published recently.

We show several new inequalities found recently that the basic sequence of the saturated homogeneous ideal I of an integral curve in P must satisfy. Then we compare our results with Cook’s assertions on the generic initial ideal of I, carrying out numerical computations with the use of a computer. The outcome is that we have obtained new restrictions on the generic initial ideal of I. When char...

We study a two-dimensional model which undergoes a transition between active and absorbing phase. The transition point in this model is of novel type: it combines some features of a continuous ((2+1)DP) and a discontinuous transition. Some arguments supported by Monte Carlo simulations prompted us to predict the exact location of the transition point. Typeset using REVTEX 1 Recently, nonequilib...