In this paper, we present a software package for the data mining of Twitter microblogs for the purpose of using them for the stock market analysis. The package is written in R langauge using apropriate R packages. The model of tweets has been considered. We have also compared stock market charts with frequent sets of keywords in Twitter microblogs messages.

AbstractTheoretical results relating to the facial structure of the general binary integer-programming polytope conv({x ∈ {0, 1} : Ax ≤ b}) where A ∈ r n × R , and b ∈R are presented. A conflict hypergraph is constructed and some induced hyperstars create valid inequalities of . BIP P These inequalities are further shown to produce large dimensional faces. Some computational results show the b...

Performance management seems to be essential in business area and is also an exciting topic. Despite significant and myriads of research efforts, performance management guide today as a rigorous approach is still in an immature state and metrics are often selected based on intuitive and heuristic approach. In R&D side, the difficulty to guide the proper performance management is even more incre...

Keywords: Systems of nonlinear delay differential equations Time-varying delays Global stability M-matrix BAM neural network Leakage delays a b s t r a c t We consider a nonlinear non-autonomous system with time-varying delays

We provide a refoundation of the symmetric growth equilibrium characterizing the research sector of vertical R&D-driven growth models. We argue that the usual assumptions made in this class of models leave the agents indi¤erent as to where targeting research: hence, the problem of the allocation of R&D investment across sectors is indeterminate. By introducing an “" contamination of con…dence” ...

Some connections between quantum computing and quantum algebra are described, and the Four Color Theorem (4CT) is interpreted within both contexts. keywords: Temperley-Lieb algebra, Jones-Wenzl idempotents, Bose-Einstein condensate, analog computation, R-matrix

SeriousEducationalVideoGames(SEGs)playalargeroleineducationforbothchildrenandadults. However,thebudgetforSEGsistypicallylowerthantraditionalentertainmentvideogames,bringing withittheneedtooptimizethelearningexperience.Thisarticlelooksattherolegameimmersion playsinimprovinglearningoutcomes,usingtheRevisedGameEngagementModel(R-GEM)to det...