Advances in robotics research bring robots closer to real world applications. Although robots have become increasingly capable, productive interaction is still restricted to specialists in the field. In this paper, we propose an interactive architecture, based on visual capabilities, which allows robots to interact with people in a natural way, to deal with multiple users, and to be constantly ...

Dogs infected with Dirofilaria immitis, Ehrlichia canis, or Borrelia burgdorferi may show nonspecific clinical signs or may be asymptomatic. In Brazil, E. canis and D. immitis infections are frequently diagnosed based on the presence of classical signs; however, serologic tests are seldom performed to confirm the presence of infection. To estimate the seroprevalence of these three canine diseas...

Serologic evaluation for the diagnosis of Lyme disease has been confounded by several factors, including a high prevalence of clinically normal dogs testing seropositive, persistence of antibodies, and the introduction of vaccines that will induce antibodies detectable by immunofluorescent antibody assay, whole-cell ELISA, and Western blot assay. The utility of a commercially available in-offic...

A critical challenge in robot learning from demonstration is the ability to map the behavior of the trainer onto a robot’s existing repertoire of basic/primitive capabilities. In part, this problem is due to the fact that the observed behavior of the teacher may consist of a combination (or superposition) of the robot’s individual primitives. The problem becomes more complex when the task invol...

A significant challenge in designing robot systems that learn from a teacher’s demonstration is the ability to map the perceived behavior of the trainer to an existing set of primitive behaviors. A main difficulty is that the observed actions may constitute a combination of individual behaviors’ outcomes, which would require a decomposition of the observation onto multiple primitive behaviors. ...

Inspired by the Witkowski’s algorithm, we introduce a novel path planning and replanning algorithm – the two-way D* (TWD*) algorithm – based on a two-dimensional occupancy grid map of the environment. Unlike the Witkowski’s algorithm, which finds optimal paths only in binary occupancy grid maps, the TWD* algorithm can find optimal paths in weighted occupancy grid maps. The optimal path found by...

Orbital acceleration in polar: a = (r̈ − rθ̇2)r̂ + (rθ̈ + 2ṙθ̇)θ̂ Legendre polynomials: P1(x) = 1, P2(x) = x, P3(x) = (3x 2 − 1)/2; orthogonality: ∫ 1 −1 Pm(x)Pn(x)dx = 2 2n+1δmn Eccentricity: e > 1 hyperbola; e = 1 parabola; 0 < e < 1 ellipse; e = 0 circle Stirling’s Approximation: lnN ! = N lnN −N Gaussian Integral: ∫∞ −∞ e −ax2dx = √ π/a ∫∞ −∞ x 2e−ax 2 dx = √ π/2a3/2 ∫∞ 0 x 3e−αx 2 = 1/2α2 Delta ...

A cognitive robot may face failures during the execution of its actions in the physical world. In this paper, we investigate how robots can ensure robustness by gaining experience on action executions, and we propose a lifelong experimental learning method. We use Inductive Logic Programming (ILP) as the learning method to frame new hypotheses. ILP provides first-order logic representations of ...

The electronic structure of cyclopentadienyl nickel nitrosyl (1) in the ground state as well as the cationic states of 1 are investigated by means of a semiempirical INDO Hamiltonian and many body perturbation theory. I t is demonstrated tha t the nature of the NiNO coupling is largely covalent while the interaction between the 3d center and the cyclopentadienyl ligand is predominantly of ionic...

Fix a prime power q and integers m ≥ 2, σ > 0, x > 0, g ≥ 0, d ≥ mσ + 1 such that q ≥ (δ − 1)δ3, where δ := d3 + 3dx + 4x + 2g − 2. Let C ⊂ P be a smooth degree x curve defined over Fq such that h(P,IC(σ − 1)) = h(C,OC (σ − 2)) = 0 and pa(C) = g. Here we prove the existence of a degree d surface X ⊆ P3 defined over Fq, such that Sing(X) = C and X has ordinary multiplicity m along C, i.e. for ev...