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For a compact, orientable, irreducible, ∂-irreducible, and an-annular 3-manifold, it is shown there are only finitely many boundary slopes for incompressible ∂-incompressible surfaces of bounded Euler characteristic. We use normal surface theory the inverse relationship crushing triangulation along [8] that inflating an ideal [12] to introduce study boundary-efficient triangulations end-efficie...

Recent research suggests that the resurgence of bed bugs in the U.S. has occurred at an alarming rate. Assumptions have been made that socioeconomic status is not associated with the prevalence of bed bug infestations. Little information is available at the local level, however, about the prevalence of bed bugs in private homes. The authors' pilot study aimed to identify prevalence, knowledge, ...

in this research the productivity and cost of komatsu d60 bulldozer in earth working operations of secondary forest road was studied in lolet forests, lied in one of the tajan river watersheds. the daily work elements of the machine including productive time, unproductive time, technical, operational and personal delays for 12 days and in two slopes of 30 to 50 and 50 to 70 percents were invest...

We study here slopes of periodicity of tilings. A tiling is of slope θ if it is periodic along direction θ but has no other direction of periodicity. We characterize in this paper the set of slopes we can achieve with tilings, and prove they coincide with recursively enumerable sets of rationals.

We apply combinatorial arguments to establish structural constraints on Costas arrays. We prove restrictions on when a Costas array can contain a large corner region whose entries are all 0. In particular, we prove a 2010 conjecture due to Russo, Erickson and Beard. We then constrain the vectors joining pairs of 1s in a Costas array by establishing a series of results on its number of “mirror p...

The geological structure and stratum lithology have important roles in the seismic stability of complex slopes; however, their complicate engineering construction. Four three-dimensional, layered granite slope models with infinite boundaries were modeled via finite element method. response characteristics slopes are systematically analyzed time–frequency domain. A frequency-domain analysis meth...

We define the slope of a colored link in an integral homology sphere, associated to admissible characters on group. Away from certain singular locus, slope is rational function which can be regarded as multivariate gen