How has the Portuguese innovation capability evolved? Estimating a time series of the stock of technological knowledge (19602001)

2007 ◽  
Vol 6 (2) ◽  
pp. 77-95 ◽  
Author(s):  
Aurora Amlia Castro Teixeira
Keyword(s):  
Time Series ◽  
Technological Knowledge ◽  
Innovation Capability ◽  
Stock Of Technological Knowledge

Obstacles to innovation in Brazil

2017 ◽  
Vol 31 (3) ◽  
pp. 168-183 ◽  
Author(s):  
Marcia Siqueira Rapini ◽  
Tulio Chiarini ◽  
Pablo Felipe Bittencourt
Keyword(s):  
National Survey ◽  
Technological Knowledge ◽  
Industrial Firms ◽  
Stock Of Technological Knowledge

Through an investigation of data available from the Brazilian Innovation Survey (Pesquisa de Inovação) of the Brazilian Institute of Geography and Statistics (Instituto Brasileiro de Geografia e Estatística) and from a national survey on university–firm interactions (the BR Survey), the authors show that Brazilian industrial firms lack qualified individuals for two key activities: the promotion of innovation and the establishment of a dialogue between universities and firms. Brazilian firms’ weaknesses and the inadequacy of the workforce supply generate scarce (or inadequate) ‘know-why’. Furthermore, a restricted perspective in Brazilian universities, focused on creating a more educated society rather than augmenting the stock of technological knowledge, constrains the generation of ‘know-what’ and ‘know-who’.

The LDE-Type Flare Occurrence (1969-1993)

1994 ◽  
Vol 144 ◽  
pp. 279-282
Author(s):  
A. Antalová
Keyword(s):  
Time Series ◽  
Fourier Analysis ◽  
Sunspot Cycle ◽  
List Type ◽  
Type Number ◽  
Solar Cycles ◽  
Type Iv ◽  
Long Duration ◽  
Cycle Maximum ◽  
Flare Index

AbstractThe occurrence of LDE-type flares in the last three cycles has been investigated. The Fourier analysis spectrum was calculated for the time series of the LDE-type flare occurrence during the 20-th, the 21-st and the rising part of the 22-nd cycle. LDE-type flares (Long Duration Events in SXR) are associated with the interplanetary protons (SEP and STIP as well), energized coronal archs and radio type IV emission. Generally, in all the cycles considered, LDE-type flares mainly originated during a 6-year interval of the respective cycle (2 years before and 4 years after the sunspot cycle maximum). The following significant periodicities were found:• in the 20-th cycle: 1.4, 2.1, 2.9, 4.0, 10.7 and 54.2 of month,• in the 21-st cycle: 1.2, 1.6, 2.8, 4.9, 7.8 and 44.5 of month,• in the 22-nd cycle, till March 1992: 1.4, 1.8, 2.4, 7.2, 8.7, 11.8 and 29.1 of month,• in all interval (1969-1992):a)the longer periodicities: 232.1, 121.1 (the dominant at 10.1 of year), 80.7, 61.9 and 25.6 of month,b)the shorter periodicities: 4.7, 5.0, 6.8, 7.9, 9.1, 15.8 and 20.4 of month.Fourier analysis of the LDE-type flare index (FI) yields significant peaks at 2.3 - 2.9 months and 4.2 - 4.9 months. These short periodicities correspond remarkably in the all three last solar cycles. The larger periodicities are different in respective cycles.

Filter Design for the Seasonal Adjustment of a Time Series

1974 ◽  
Vol 3 (12) ◽  
pp. 1171-1186
Author(s):  
Edward Melnick ◽  
John Moussourakis
Keyword(s):  
Time Series ◽  
Filter Design ◽  
Seasonal Adjustment

Automatic Identification of Autoregressive Integrated Moving Average Time Series

1982 ◽  
Vol 14 (3) ◽  
pp. 156-166 ◽  
Author(s):  
Chin-Sheng Alan Kang ◽  
David D. Bedworth ◽  
Dwayne A. Rollier
Keyword(s):  
Time Series ◽  
Moving Average ◽  
Automatic Identification ◽  
Autoregressive Integrated Moving Average
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