We report cross-section measurement and propagation measurement of modes of large mode area holey fibers using near-field scanning optical microscopy (NSOM). Mode profiles are measured at the fiber end face using a scanning optical fiber tip held 10 nm from the surface, and compared to theoretical models. Both amplitude and phase of the electric field of the propagating light is measured using ...

Can the arts be analyzed in a quantitative manner? We propose a methodology to study music development by applying multivariate statistics on composers characteristics. Seven representative composers were considered in terms of eight main musical features. Grades were assigned to each characteristic and their correlations were analyzed. A bootstrap method was applied to simulate hundreds of art...

After a brief review of the current research on multi-robot systems, the paper presents a path planning and control scheme for a cooperative three-robot system transferring/manipulating a large object from an initial to a desired final position/orientation. The robots are assumed to be capable of holding the object at three points that define an isosceles triangle. The mode of operation adopted...

In applied econometrics, the researcher typically has two recourses for conducting inference: assuming normal errors or relying on asymptotic theory. In economic models, the assumption of normal errors is rarely justified and, for moderate sample sizes, the applicability of a central limit theorem is questionable. Researchers now have a third alternative: the bootstrap. Central to the bootstrap...

This paper presents an overlapping generations model in which children seek to manipulate the size of the end-of-life bequest they receive from the parent. I first use numerical simulations to show this intergenerational strategic behavior does not negate the debt neutrality assertions of Ricardian equivalence. Then, by introducing capital gains and inheritance taxes, I show the crowding out ef...

In this paper, movement speed models of a robotic manipulator are presented according to the mode of operation of the human hand, when it wants to grasp and release an object. In order to develop the models, measurements on a human agent were required regarding the movement coordinates of his hand. The movement patterns have been approximated on the intervals, using first and second degree func...

Declarative debugging has many advantages over conventional approaches to de-bugging for logic and functional programs. This paper extends a previously deened scheme for declarative debugging in which computations were considered either correct or erroneous. We argue that a third value, \inadmissible", should be supported and show how this can be done. Two classes of bugs are deened: one equiva...

In this paper, we consider the problem of task-space tracking control of redundant robot manipulators. Based on a quaternion representation of the end-effector orientation, we design a class of task-space controllers that ensure asymptotic end-effector position and orientation tracking. To facilitate the control design, we Þrst develop model-based and adaptive full-state feedback controllers. W...