KDP/PEDOT: PSS mixture as a new alternative in the fabrication of pressure sensing devices

In this work we studied the mixture of poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS), a commercial polymer, with monobasic potassium phosphate (KDP), a piezoelectric salt, as a possible novel material in the fabrication of a low cost, easy-to-make,flexible pressure sensing device. The mixture between KDP and PEDOT: PSS was painted in a flexible polyester substrate and dried. Afterwards, I x V curves were carried out. The samples containing KDP presented higher values of current in smaller voltages than the PEDOT: PSS without KDP. This can mean a change in the chain arrays. Other results showed that the material responds to directly applied pressure to the sample that can be useful to sensors fabrication. (c) 2008 Elsevier B.V. All rights reserved.

As provas de matemática no acesso à universidade : um estudo sobre o processo seletivo seriado (PSS) na Universidade Federal da Paraíba

Este trabalho voltou-se para o processo de seleção para ingresso nas Universidades Brasileiras, em particular o realizado pela Universidade Federal da Paraíba, a qual utiliza duas formas: vestibular tradicional e Processo Seletivo Seriado (PSS). O PSS, em particular as provas de Matemática, constitui centro de interesse da pesquisa cujo objetivo é investigar a opinião de professores a respeito de conteúdo contemplado, grau de dificuldade exigido e aplicabilidade dos Parâmetros Curriculares Nacionais nas provas. O presente estudo caracteriza-se como uma pesquisa exploratória, descritiva. Tendo como sujeitos professores de Matemática das escolas públicas e privadas que oferecem o curso médio, localizadas na cidade de João Pessoa. Os resultados apontam que não foram observadas as diretrizes Curriculares Nacionais no que tange a conteúdos, habilidades e competências que servem de referência para avaliação do desempenho dos alunos do Ensino Médio nas soluções de problemas matemáticos com diferentes graus de dificuldade. Consideramos que os conteúdos privilegiados continuam sendo os determinados pela comissão do vestibular em seu documento norteador o manual do candidato.

PSS Development and Training Strategy 2006-2016 (PDF 149KB)

This Circular details arrangements for securing the strategic priorities of the PSS Development and Training Strategy (the Strategy) in Northern Ireland from 1 April 2012 onwards. åÊThis replaces the previous circular HSS (OSS) Training 1/2010.

Key Indicators of PSS for NI (2002)

Key Indicators of PSS for NI (2002)

"Askeleen päässä taidosta" - Kolmen askeleen menetelmän soveltuvuuden testaaminen oppimistehtävän avulla motoristen taitojen opetukseen 4. luokan käsityössä

Tutkimuksen tarkoituksena on selvittää taitojen opettamisen kolmen askeleen menetelmän soveltuvuutta motoristen taitojen opetukseen käsityön 4. luokalla. Menetelmän soveltuvuuden testaamiseksi on suunniteltu ja valmistettu oppimistehtävä. Oppimistehtävä on laadittu taitojen opettamisen yleismenetelmän, kolmen askeleen menetelmän pohjalta. Oppimistehtävän laadinnassa on käytetty tukena myös suljetun oppimistehtävän teoreettista perustaa, sekä ositetun ja taitolajipainotteisen käsityön piirteitä. Oppimistehtävä toteutettiin satakuntalaisessa koulussa ja toteutuksen suoritti koulun oma käsityönopettaja. Oppimistehtävän aikana tapahtuvasta toiminnasta, opetuksesta ja oppimisessa on pyritty saamaan tietoa kaikilta siihen osallistuneilta osapuolilta. Oppilaille on suoritettu oppimista mittaava alku ja loppu kysely. Opettajaa on haastateltu, jolloin on saatu oppimistehtävän toteuttajan kokemuksia tapahtuneesta. Lisäksi tutkijat ovat itse osallistuneet toiminnan havainnointiin, sekä videoineet opetusta ja oppilaiden toimintaa. Tutkimus on tutkimusotteeltaan laadullinen tapaustutkimus. Tutkimuksen tuote on motoristen taitojen opettamiseen laadittu oppimistehtävä. Tutkimuksen kulku ja toteutus on kuvattu yksityiskohtaisesti mittarien laadinnasta, aineiston keruun ja -tulosten analysoinnin kautta synteesiin ja tutkimusongelmiin vastaamiseen. Tutkimuksen tulokset osoittavat, että taitojen opettamisen kolmen askeleen menetelmä sisältää myös perusopetuksessa toteutettavan taitojen opetuksen kannalta keskeisimmät elementit. Menetelmä soveltuu etenkin vasta-alkaneille opettajille, mutta myös kokeneille opettajille. Taitojen oppimisen kannalta erityisen tärkeäksi seikaksi tällä ikäryhmällä osoittautui demonstrointi ja ohjaaminen. Lisäksi saimme yksityiskohtaista tietoa, jonka avulla menetelmästä voisi laatia tälle ikäryhmälle vieläkin sopivamman.

Tecttôniica póss--riifftte na Baciia Pottiiguar

The study of Brazilian sedimentary basins concentrates on their rift phase, whereas the Post-rift phase has been considered a tectonic quiescent period. The post-rift sequence of the Potiguar Basin, in the far northeastern Brazil, was once considered little deformed, however several studies have shown how that it was affected by major fault systems. The purpose of this thesis is to characterize the post-rift tectonic. The specific objectives are: to characterize the Neogene and Quaternary sedimentary units that outcrop of the Potiguar Basin; to show how the NW-SEtrending Afonso Bezerra Faults System deformed outcrop rocks in the Basin; to describe soft-sediment deformation in gravels of the Quaternary Alluvial Deposits from Açu River. Facies analyses, grain-size studies, luminescence dating, remote sensing, structural mapping, shallow geophysics (georadar), paleostress and petrography were carried out. The structural mapping and the georadar sections indicated that the Carnaubais and Afonso Bezerra fault systems formed fractures, silicified and non-silicified faults or deformation bands, affecting mainly the Açu, Jandaíra and Barreiras formations. The petrographic data indicate that the strong silicification resulted in a sealant character of the faults. Paleostress analysis indicates that two stress fields affected the Basin: the first presented N-S-trending compression, occurred from the Neocretaceous to the Miocene; the second stress field presents E-W-trending compression, acts from the Miocene to the present. It was verified once the Afonso Bezerra System Faults was reactivated in periods post-Campanian and affects all post-rift lithostratigraphic units of Potiguar Basin, including Quaternary sedimentary covers. The study about soft-sediment deformation structures indicates that they are similar in morphology and size to modern examples of seismically-induced deformation strutures in coarse sediments. TL and OSL ages indicate that sediment deposition and associated soft-sediment deformation occurred at least six times from ~352 Ka to ~9 Ka. Finally these studies demonstrate how recent is tectonics in the Basin Potiguar

Estudo da estabilidade a pequenas perturbações de sistemas elétricos multimáquinas com dispositivos FACTS do tipo SSSC e controladores suplementares (POD e PSS)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

PEDOT:PSS self-assembled films to methanol crossover reduction in Nafion (R) membranes

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)