the purpose of the present study was to compare the effects of two methods of self-modeling and video demonstration of an expert on the acquisition and retention of volleyball serve skill. participants were 30 students (aged between 12 and 14) who were assigned into two homogeneous groups after the pretest. the self-modeling group (n = 15) watched their performances in the criterion task via a ...

Today, robots are already able to solve specific tasks in laboratory environments. Since everyday environments are more complex, the robot skills required to solve everyday tasks cannot be known in advance and thus not be programmed beforehand. Rather, the robot must be able to learn those tasks being instructed by users without any technical background. Hence, Learning from Demonstration (LfD)...

A repeatable method based on conventional micro fabrication techniques for creating sharpened emitters from porous tungsten has been explored. A laboratory demonstration thruster comprised of 49 of these porous tungsten emitters has been built and tested. The demonstration device operates on the electrostatic field evaporation of ions from ionic liquids. The emitters are contained in three line...

A demonstration environment is being developed at the Auto-ID Centre in Cambridge, in order to show the benefits of Auto-ID technology when applied to manufacturing control systems. In this paper, the second phase of development is examined. The first phase combined conventional control with Auto-ID information. This phase specifically looks at how Auto-ID facilitates a distributed Holonic Manu...

CT is an important modality for imaging mediastinal masses, and certain CT attenuation features (fat, calcium, or water attenuation, contrast enhancement) are well known to suggest specific diagnoses. In a series of 132 consecutive patients with tissue-proven mediastinal masses, these specific CT features were present in only 16. We evaluated the ability of CT to differentiate soft tissue media...

purpose: the present study aims at comparing the impact of two teaching/learning approaches-self- directed/paced learning and lecture/demonstration-based instruction-on mastering psychomotor skills among nursing students. material & method: thirty nursing students were selected for the study. they filled out questionnaires indicating the demographic factor, and mean exam scores achieved in the ...

A pairwise balanced design is an ordered pair S,B , denoted PBD S,B , where S is a finite set of symbols, and B is a collection of subsets of S called blocks, such that each pair of distinct elements of S occurs together in exactly one block of B. Here |S| v is called the order of the PBD. Note that there is no condition on the size of the blocks in B. If all blocks are of the same size k, then...

Many iterative tasks in direct manipulation interfaces cannot be automated with standard application tools, forcing users to repeat the same interface actions again and again. We describe a domain-independent programming by demonstration system that learns iterative tasks in a range of widely-used applications on a popular computer platform. An evaluation showed that users are capable of using ...

Programming by Demonstration has proved to be an interesting research area. Nevertheless, despite many experimental systems, it did not find any field area where it should be used extensively. In this paper, we describe a Computer Aided mechanical Design system which incorporates Programming by Demonstration capabilities, named EBP, for Example-Based Programming in Parametrics. EBP is intended ...