Robots must plan and execute tasks in the presence of uncertainty. Uncertainty arises from sensing errors, control errors, and the geometry of the environment. By employing a combined strategy offorce and position control, a robot programmer can often guarantee reaching the desired final configuration from all the likely initial configurations. Such motion strategies permit robots to carry out ...

Server Push, one of the most promising features of HTTP/2, allows web servers to speculatively send unsolicited web resources to clients. While the mechanism for Push is well defined, policies for effectively utilizing push to maximize page load performance are poorly understood. In this work we investigate the factors that should be considered when implementing a Push policy and combine them t...

BACKGROUND Health care workers (HCWs) can acquire and transmit influenza to their patients and coworkers, even while asymptomatic. The U.S. Healthy People 2010 initiative set a national goal of 60% coverage for HCW influenza vaccination by 2010. Yet vaccination rates remain low. In the 2008-2009 influenza season, Flushing Hospital Medical Center (FHMC; New York) adopted a "push/pull" point-of-d...

We are living in an increasingly information rich society. Geographical Information Systems now allow us to precisely tag information to specific features, objects and locations. The Internet is enabling much of this information to be accessed by a whole spectrum of users. At CASA we are attempting to push this technology towards a three-dimensional GIS, that works across the Internet and can r...

A novel single-stage push–pull electronic ballast with high input power factor is presented in this paper. The proposed electronic ballast combines the front-end power-factor corrector and push–pull converter into a single-stage converter. Compared to the single-stage class-D electronic ballast, the proposed circuit does not require an isolated driver. The control of the circuit is easier and t...

A great deal of research has investigated the potential parameters of tactile feedback for virtual buttons. However, these studies do not take the possible effects of feedback latencies into account. Therefore, this research investigates the impact of tactile feedback delays on touchscreen keyboard usage. The first experiment investigated four tactile feedback delay conditions during a number e...

This paper explores the potentially powerful role e-assessment practices can have on culture change in learning and teaching. This paper demonstrates how new e-assessment practices can ‘push back’ through educational institutions. This is done by applying the work of Gibbs and Simpson (2004/5) to e-assessment practices. To illustrate the practical effects of this evidence-based framework, the a...

introduction : this in vitro study was designed to evaluate the effect of smear layer removal on push-out bond strength of white mineral trioxide aggregate (wmta) and calcium-enriched mixture cement (cem). materials and methods: dentin discs with 3 mm thicknesses were divided into 4 groups ( n =15): group 1: irrigation of the canal with normal saline and filling with wmta; group 2: irrigation w...

this article analyses the push and pull factors that bring visitors to the iranian national parks. the study used a structured questionnaire to collect data on these factors and the socio-demographic profile of the visitors. survey conducted in boujagh national park, an area of 3177 hectares located in the north of the iran, produced 400 questionnaires. the factor analysis identified four push ...