This study examined the relationship between the external representation, verbal encoding vs. visual encoding, of graph information and the impact on graph comprehension. Graph comprehension tasks included responses to true/false statements addressing global and local graph information, visual recognition, and graph drawing. The findings suggest that the specific modality of the external repres...

Manifestly Lorentz covariant Feynman rules are given in terms of a “scalar” field for each helicity, dramatically simplifying the calculation of amplitudes with massless particles. The spinor helicity formalism is properly identified as a null complex spacelike (not lightlike) gauge, where two massless external momenta define the reference frame. Usually this gauge is applied only to external l...

the aim of ideal canal preparation is to prevent iatrogenic aberrations such as transportation. the aim of this study was to evaluate the root canal transportation by reciproc file with and without glide path.thirty acrylic-resin blocks with a curvature of 60° and size#10 (2% taper) were assigned into two groups (n= 15). in group 1, the glide path was performed using stainless steel k-files siz...

We give several internal and external characterizations of pseudocompactness in frames which extend (and transcend) analogous characterizations in topological spaces. In the case of internal characterizations we do not make reference (explicitly or implicitly) to the reals.

A universal BiCMOS low-voltage-swing transceiver (driverlreceiver) with low on-chip power consumption is reported. Operating at 3.3V, it can drivekeceive low-voltageswing signals with termination voltages ranging from SV down to 2V without using any external reference voltages.