The paper analyses how the area of production and operations management (POM) in Brazil should change/adapt in order to remain relevant in the so called “new economy”. Drawing from insights coming from both the relevant literature and a survey, a preliminary research and teaching agenda is proposed.

We propose a new type of surface wave lens that is made of a circular in-plane inhomogeneous metamaterial slab and numerically demonstrate its capability to focus surface waves at optical frequencies. This approach can achieve a smaller focal spot size than the previously demonstrated Ag plasmonic lens. The use of inhomogeneous metamaterials is to decrease the high losses that are usually assoc...

We report a new type of phononic crystals with topologically nontrivial band gaps for both longitudinal and transverse polarizations, resulting in protected one-way elastic edge waves. In our design, gyroscopic inertial effects are used to break the time-reversal symmetry and realize the phononic analogue of the electronic quantum (anomalous) Hall effect. We investigate the response of both hex...

The literature contains many investigations dealing with questions concerning familes of nonoverlapping sets. Even so, the recent paper [1] by E. Friedman introduces an apparently new type of interesting problems. In order to formulate them we need some definitions. Throughout the paper, without additional mention, we shall assume that each family C considered consist of a finite number of nono...

Let Lambda=SL(2)(Z) be the modular group and let c(n)(Lambda) be the number of congruence subgroups of Lambda of index at most n. We prove that lim(n--> infinity )(log c(n)(Lambda)/((log n)(2)/log log n))=(3-2(sqrt)2)/4. The proof is based on the Bombieri-Vinogradov "Riemann hypothesis on the average" and on the solution of a new type of extremal problem in combinatorial number theory. Similar ...

Spin-orbit coupled systems generally break the spin rotation symmetry. However, for a model with equal Rashba and Dresselhauss coupling constants, and for the [110] Dresselhauss model, a new type of SU(2) spin rotation symmetry is discovered. This symmetry is robust against spin-independent disorder and interactions and is generated by operators whose wave vector depends on the coupling strengt...

The shift to new paradigms in education pushed by new media has initiated a critical re-thinking of the way we talk of and practice teaching and learning which is still open. Some concepts of the Western educational tradition can be helpful in finding a new way of integrating IT in learning. This paper propose to consider knowledge as a relationship and shows how this provides helpful insights ...

Abstract. In a recent paper the authors have proved that a convex body K ⊂ R, d ≥ 2, containing the origin 0 in its interior, is symmetric with respect to 0 if and only if Vd−1(K ∩ H ) ≥ Vd−1(K ∩ H) for all hyperplanes H,H ′ such that H and H are parallel and H ∋ 0 (Vd−1 is (d − 1)–measure). For the proof the authors have employed a new type of integro–differential transform, that lets to corre...