Extending the body with a tool could imply that characteristics of hand movements become characteristics of the movement of the effective part of the tool. Recent research suggests that such distal shifts are subject to boundary conditions. Here we propose the existence of three constraints: a strategy constraint, a constraint of movement characteristics, and a constraint of mode of control. We...

As a follow-up of previous work the authors, this considers uniform global time-renormalization functions for gravitational N-body problem. It improves on estimates radii convergence obtained therein by using completely different technique, both solution to original equations and renormalized ones. The aforementioned technique which new are built upon is known as majorants allows an easy applic...

To define the relationship between the response – a random or dependent variable y and a predetermined or independent variable x, a straight line or concave respectively convex functions affected by random errors must be used. A locally weighted low-degree polynomial regression i.e. linear is fit to several subsets of data using linear least square fitting and a first-degree polynomial or the e...

A real sequence {xk} is said to be (∗)-monotone with respect to a sequence {pk} and a positive integer σ if xk > 0 and (−1)∆(xk − pkxk−σ) ≥ 0 for n ≥ 0. This paper is concerned with the existence of (∗)-monotone solutions of a neutral difference equation. Existence criteria are derived by means of a comparison theorem and by establishing explicit existence criteria for positive and/or bounded s...

This paper presents improved solution methods for kinematic wave traffic problems with concave flow-density relations. As explained in part I of this work, the solution of a kinematic wave problem is a set of continuum least-cost paths in space-time. The least cost to reach a point is the vehicle number. The idea here consists in overlaying a dense but discrete network with appropriate costs in...

We use education reforms implemented in Tanzania in the 1960s as a source of exogenous variation in education to estimate the returns to education in nationally representative cross sectional datasets from 2001 and 2006. We find that returns to an extra year of education are between 8% and 13% when using OLS. The education reform increased the number of students finishing primary school and inc...