We prove a new combinatorial characterization of polynomial learnability from equiva lence queries and state some of its consequences relating the learnability of a class with the learnability via equivalence and membership queries of its subclasses obtained by restricting the instance space Then we propose and study two models of query learning in which there is a probability distribution on t...

This document constitutes the consolidated deenition of Chimera; it is a revised version of the T21D2 deliverable presented in June 1993 Author(s):

One of the most striking findings in the recent high-spin spectroscopy is the discovery of onephonon, and possibly double-phonon, excitation of the nuclear wobbling rotational bands. In this talk, we first review the properties of observed wobbling motions, and discuss the failure and success of the possible interpretation in terms of the simple rotor model. Then, we further present results of ...

stable crystalline phosphorus ylides are obtained in excellent yields from the 1:1:1 addition reactionbetween hydantoins or thiohydantoins and dialkyl acetylenedicarboxylates in the presence oftriphenylphosphine. these phosphoranes undergo smooth intramolecular wittig reaction followedby an electrocyclic ring opening to produce dialkyl (e)-2-(2,5-dihydro-5,5-diaryl-2-thioxo-1h-imidazol-4-yl)fum...

Many industrial set-ups nowadays rely on different types of gears to transmit rotational torque. A gear usually operates in a closed environment, immersed into lubricant (oil). Therefore, direct monitoring of its condition is not possible. We have constructed a pilot test bed in order to develop and test different methods for gear health monitoring and predicting the time of failure. In this pa...

Stage I compression-extension injury of the cervical spine, as described by Allen et al, is not always a stable injury. The combined unilateral failure of the posterior structures under compression together with failure of the anterior structures under tension will lead to rotational instability around the intact lateral mass. We report on 10 consecutive patients who presented with this type of...

A graphical simulation system for process planning is presented. Only machined rotational parts are considered in this paper. Feature-based representation is used to build the solid model of the parts and is the basis of the process plan. A simulator is developed to simulate the sequence of the process plan. It provides a mechanism to verify the feasibility of the process plan and to check whet...

The aim of this study was to perform a biomechanical analysis of the cement-in-cement (c-in-c) technique for fixation of selected Vancouver Type B1 femoral periprosthetic fractures and to assess the degree of cement interposition at the fracture site. Six embalmed cadaveric femora were implanted with a cemented femoral stem. Vancouver Type B1 fractures were created by applying a combined axial ...

Proximal fifth metatarsal fractures, zones II and III, are commonly treated surgically, especially in elite athletes. Intramedullary screw fixation remains the most used construct despite nonunion and refracture. High tensile forces on the plantar-lateral aspect of the fifth metatarsal are difficult to control, and intramedullary screw fixation depends on ideal screw position, length, and width...