A pencil-type ionization chamber, developed at Instituto de Pesquisas Energéticas e Nucleares (IPEN), was characterized with the objective to verify the possibility of its application in radiation field mapping procedures. The characterization tests were evaluated, and the results were satisfactory. The results obtained for the X radiation field mapping with the homemade chamber were compared w...

Computerized lessons employing stimulus equivalence technology, used previously under laboratory conditions to teach inferential statistics concepts to college students, were employed in a group setting for the first time. Students showed the same directly taught and emergent learning gains as in laboratory studies. A brief paper-and-pencil examination, suitable for classroom use, captured effe...

A method of depicting crew climate using a group diagram based on behavioral ratings is described. Behavioral ratings were made of twelve three-person professional airline cockpit crews in full-mission simulations. These crews had been part of an earlier study in which captains had been had been grouped into three personality types, based on pencil and paper pre-tests. We found that low error r...

Corneal stromal and/or penetrating ocular injuries from pencils and pencil lead are more common in childhood and may lead to intraocular infection or severe intraocular sterile inflammatory reaction. Herein we report 3 children with ocular trauma due to pencil lead injuries. The first case had corneal stromal injury caused by a pencil. In the second case, a pencil perforated the cornea and cont...

purpose : to evaluate the role of orthoptic treatments in the management of intermittent exotropia methods : in a retrospective study, clinical records of patients diagnosed with intermittent exotropia were reviewed. patients with basic, convergence insufficiency (ci) and divergence excess (de) types of intermittent exotropia who underwent orthoptic treatments were enrolled. office treatments i...

In this paper we propose a new matrix pencil based method for estimating parameters (frequencies and damping factors) of exponentially damped sinusoids in noise. The proposed algorithm estimates the signal parameters using a matrix pencil constructed from measured data. We show that the performance of the estimation can be signiicantly improved by the combination of our proposed matrix pencil a...