Identification of a novel response regulator, Crr1, that is required for hydrogen peroxide resistance in Candida albicans

Peer reviewe

A time of flight method to measure the speed of sound using a stereo sound card

We present an inexpensive apparatus for measuring the speed of sound, with a time of flight method, using a computer with a stereo sound board. Students measure the speed of sound by timing the delay between the arrivals of a pulse to two microphones placed at different distances from the source. It can serve as a very effective demonstration, providing a quick measurement of the speed of sound in air; we have used it with great success in Open Days in our Department. It can also be used for a full fledged laboratory determination of the speed of sound in air.Comment: Accepted for publication in The Physics Teache

Signatures of quantum phase transitions in parallel quantum dots: Crossover from local-moment to underscreened spin-1 Kondo physics

We study a strongly interacting "quantum dot 1" and a weakly interacting "dot 2" connected in parallel to metallic leads. Gate voltages can drive the system between Kondo-quenched and non-Kondo free-moment phases separated by Kosterlitz-Thouless quantum phase transitions. Away from the immediate vicinity of the quantum phase transitions, the physical properties retain signatures of first-order transitions found previously to arise when dot 2 is strictly noninteracting. As interactions in dot 2 become stronger relative to the dot-lead coupling, the free moment in the non-Kondo phase evolves smoothly from an isolated spin-one-half in dot 1 to a many-body doublet arising from the incomplete Kondo compensation by the leads of a combined dot spin-one. These limits, which feature very different spin correlations between dot and lead electrons, can be distinguished by weak-bias conductance measurements performed at finite temperatures.Comment: 7 pages, 7 figures. Accepted for publication in Phys. Rev.

O RPG como alternativa lúdica para o ensino da filosofia

Anais do II Seminário Seminário Estadual PIBID do Paraná: tecendo saberes / organizado por Dulcyene Maria Ribeiro e Catarina Costa Fernandes — Foz do Iguaçu: Unioeste; Unila, 2014Este relato discute o trabalho científico-pedagógico ora em desenvolvimento com alunos do 1o ano do ensino médio do Colégio Visconde de Guarapuava. Refere-se à possibilidade de, neste grau,ensinar filosofia de forma lúdica, tornando assim mais fluente o seu aprendizado. O trabalho parte da hipótese que aprender filosofia de forma lúdica é possível; o que pode ser feito através do Role Playing Game (RPG), cuja estruturação se baseia na forma de uma aventura. O RPG consiste basicamente em três atos, que são compostos por cenas e turnos. Devido a sua facilidade e por ser uma forma divertida, diferente e inovadora de se ensinar, o RPG possibilita uma melhor adequação do ensino de filosofia e, ao mesmo tempo, um aprendizado mais eficaz e descontraído. O relato discute ainda a necessidade da elaboração de um sistema de regras genéricas de RPG, de modo a contribuir para as diversas maneiras de sua adaptação e aplicação em sala de aul