6,627 research outputs found
Organizational Characteristics and Performance of Export Promotion Agencies: Portugal and Ireland compared
Export Promotion Agencies (EPAs) have been in operation in developed countries since the beginning of the 20th century to improve the competitiveness of firms by increasing knowledge and competences applied to export market development.Export Promotion Agencies; Organizational Performance; Portugal; Ireland
Further progress in ion back-flow reduction with patterned gaseous hole-multipliers
A new idea on electrostatic deviation and capture of back-drifting
avalanche-ions in cascaded gaseous hole-multipliers is presented. It involves a
flipped reversed-bias Micro-Hole & Strip Plate (F-R-MHSP) element, the strips
of which are facing the drift region of the multiplier. The ions, originating
from successive multiplication stages, are efficiently deviated and captured by
such electrode. Experimental results are provided comparing the ion-blocking
capability of the F-R-MHSP to that of the reversed-bias Micro-Hole & Strip
Plate (R-MHSP) and the Gas Electron Multiplier (GEM). Best ion-blocking results
in cascaded hole-multipliers were reached with a detector having the F-R-MHSP
as the first multiplication element. A three-element F-R-MHSP/GEM/MHSP cascaded
multiplier operated in atmospheric-pressure Ar/CH4 (95/5), at total gain of
~10^{5}, yielded ion back-flow fractions of 3*10^{-4} and 1.5*10^{-4}, at drift
fields of 0.5 and 0.2 kV/cm, respectively. We describe the F-R-MHSP concept and
the relevance of the obtained ion back-flow fractions to various applications;
further ideas are also discussed.Comment: 17 pages, 11 figures, published in JINS
Resposta da laranjeira-pĂȘra aos nutrientes N, P, K em Latossolo Amarelo no nordeste paraense.
Publicado tambĂ©m: FRAZĂO, D. A. C.; HOMMA, A. K. O; VIĂGAS, I. de J. M. (Ed.). Contribuição ao desenvolvimento da fruticultura na AmazĂŽnia. BelĂ©m, PA: Embrapa AmazĂŽnia Oriental, 2006. p. 279-284
Desenvolvimento inicial do arroz com a antecipação da adubação de nitrogĂȘnio e seu efeito na produtividade do arroz no municĂpio de Paragominas, PA.
Analisou-se a resposta do arroz de terras altas cultivado em Latossolo Amarelo distrofico na regiĂŁo Nordeste Paraense, ao parcelamento e Ă©pocas de aplicação de fertilizante nitrogenado. Observou-se tambĂ©m as formas que permitam adaptar o sistema de produção do arroz de terras altas ao plantio direto de forma a permitir que faca parte de sistemas agrĂcolas em rotação com soja, adequando ao manejo de adubação, a relação de formas de N no solo, aos tipos e Ă©poca de manejo das coberturas de solo e a qualidade de semeadura
Resposta da aceroleira aos nutrientes N, P, K, em um latossolo amarelo de castanhal, ParĂĄ.
Publicado tambĂ©m: FRAZĂO, D. A. C.; HOMMA, A. K. O; VIĂGAS, I. de J. M. (Ed.). Contribuição ao desenvolvimento da fruticultura na AmazĂŽnia. BelĂ©m, PA: Embrapa AmazĂŽnia Oriental, 2006. p. 121-125
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