How public pension plan assets should be invested is an important but unsettled question. Alicia H. Munnell and Mauricio Soto (2007) find that the share of state and local (S&L) plan assets held in equities has grown over time, largely in parallel with private sector practices, from an average of about 40 percent in the late 1980s to about 70 percent in 2007. This exposure led to a loss of an e...

A novel probabilistic perception algorithm is presented as a real-time joint solution to data association, object tracking, and object classification for an autonomous ground vehicle in all-weather conditions. The presented algorithm extends a Rao-Blackwellized Particle Filter originally built with a particle filter for data association and a Kalman filter for multi-object tracking (Miller et a...

The DARPA Urban Challenge required robots to drive 60 miles on suburban roads while following the rules of the road in interactions with human drivers and other robots. Tartan Racing’s Boss won the competition, completing the course in just over 4 hours. This paper describes the software infrastructure developed by the team to support the perception, planning, behavior generation, and other art...

Robot navigation in urban environments requires situational reasoning. Given the complexity of the environment and the behavior specified by traffic rules, it is necessary to recognize the current situation to impose the correct traffic rules. In an attempt to manage the complexity of the situational reasoning subsystem, this paper describes a finite state machine model to govern the situationa...

We examine how accretion on to T Tauri stars may be modulated by a time-dependent ‘magnetic gate’ where the inner edge of the accretion disc is disrupted by a varying stellar field. We show that magnetic field variations on time-scales ≪ 10 yr can modulate the accretion flow, thus providing a possible mechanism both for the marked photometric variability of T Tauri stars and for the possible co...

Algebraic multigrid (AMG) is an efficient multilevel method for solving large sparse linear systems obtained from the discretisation of scalar elliptic partial differential equations. AMG can be used to compute powerful preconditioners for use with Krylov subspace methods. We report on the design and development of an efficient, robust and portable implementation of AMG that is available as pac...

The objectives of this review were: (1) to identify literature published within the last years on self-efficacy in university students; (2) describe and evaluate employed definitions measurements; (3) establish methodological coherency between stated measurement scales respectively described domains higher education. A systematic revision was conducted for articles 2007 2019. Empirical studies ...

A phenomenon known in the international literature that is nevertheless unaddressed standard indicators used for analysing fiscal policy can yield misleading results. Creative accounting distort basic statistics, dividing data into groups of “revenue” and “expenditure” leads to same distorted results, common cyclically adjusted balance are also misleading. Based on impact these distortions, six...