Electromagnetic bandgap structure consisting of an arbitrary number of cylinders are considered. In this paper, the scattering properties from this multilayered structure consisted of arbitrary shaped cylinders are analyzed. The method is used to study large varieties of configurations and structures in respect to varying shapes, sizes and material compositions. Practical applications are illus...

Correction to Levitt DG, Heymsfield SB, Pierson Jr RN, Shapses SA, Kral JG: Physiological models of body composition and human obesity. Nutrition & Metabolism 2007, 4:19.

The compositions, or ordered partitions, of integers, fall under certain natural classes. In this expository paper we highlight the most important classes by means of bijective proofs. Some of the proofs rely on the properties of zig-zag graphs the graphical representations of compositions introduced by Percy A. MacMahon in his classic book Combinatory Analysis.

We describe a course of research examining formal and semiformal heterogeneous speciica-tions, i.e., compositions of partial speciications written in diierent textual and visual notations. We describe why we believe this to be an interesting topic for further inquiry, and suggest why such speciications might prove beneecial for use in software development.

The trialitarian automorphisms considered in this paper are the outer automorphisms of order 3 of adjoint classical groups of type D4 over arbitrary fields. A one-to-one correspondence is established between their conjugacy classes and similarity classes of symmetric compositions on 8-dimensional quadratic spaces. Using the known classification of symmetric compositions, we distinguish two conj...

Based on an invariance-type property of the Lee-compositions of a linear Lee code, additional equality constraints can be introduced to the linear programming problem of linear Lee codes. In this paper, we formulate this property in terms of an action of the multiplicative group of the field [Formula: see text] on the set of Lee-compositions. We show some useful properties of certain sums of Le...

Article history: Received 16 December 2008 Accepted 20 December 2008

OBJECTIVE We aimed to investigate all-cause and cause-specific mortality among ethnic German migrants from the former Soviet Union by different immigration periods to describe associations with migration pattern and mortality. DESIGN We used pooled data from three retrospective cohort studies in Germany. PARTICIPANTS Ethnic German migrants from the former Soviet Union (called resettlers), w...

Concave compositions were recently introduced by Andrews[3] in the study of orthogonal polynomials, see also Andrews [4]. A concave composition of even length 2m, is a sum of the form ∑ ai + ∑ bi such that a1 > a2 > · · · > am = bm < bm−1 < · · · < b1, where am ≥ 0, and all ai and bi are integers. Let CE(n) denote the set of concave compositions of even length that sum to n, and ce(n) be the ca...