Critiques of the concept of key success factors have raised objections both conceptually and methodologically. From the latter perspective, common research practice is criticized for neglecting the influence of firm-specific, unobservable variables (e.g., management skills). To control for these effects a structural equation approach (“LISREL”) to the analysis of panel data is proposed. In an e...

This study deals with a family of multi-point iterative methods of arbitrary order of convergence for simultaneous computing of all roots of an algebraic equation. These methods are analogues of the well known method for computing of a single root of a nonlinear equation. Some known methods for simultaneous finding of all roots of algebraic equations are special cases of the family considered. ...

Agricultural industries, as well other are experiencing profound changes a result of Industry 4.0. A key enabler technology that is becoming increasingly incorporated into agricultural equipment combination cyber-physical systems, machine learning, the Internet things, robots, artificial intelligence, cloud, and cognitive computing, which all technologies allow sector to achieve this transforma...

When an econometric structural equation includes two endogenous variables and their coefficients are normalized so that their sum of squares is 1, it is natural to express them as the sine and cosine of an angle. The Limited Information Maximum Likelihood (LIML) estimator of this angle when the error covariance matrix is known has constant variance. Of all estimators with constant variance the ...

Two methods for simultaneous estimation of Paracetamol and Tolperisone Hydrochloride in combined tablet dosage form have been developed using Water as a solvent. The first UV spectrophotometric method was a determination using the simultaneous equation method at 242.5 nm and 260 nm. The second UV spectrophotometric method is the Q – analysis (absorption ratio) method, which involves the formati...

SSF is a system to discover the structure of simultaneous equations governing an objective process through experiments. SSF combined with another system SDS to discover a quantitative formula of a complete equation derives the quantitative model consisting of simultaneous equations reflecting the first principles underlying in the objective process. The power of SSF comes from the use of the co...

This paper is devoted to high-order numerical time integration of first-order wave equation systems originating from spatial discretization of Maxwell’s equations. The focus lies on the accuracy of high-order composition in the presence of source functions. Source functions are known to generate order reduction and this is most severe for high-order methods. For two methods based on two well-kn...

The Hamilton-Jacobi equation of relativistic quantum mechanics is revisited. The equation is shown to permit solutions in the form of breathers (oscillating/spinning solitons), displaying simultaneous particle-like and wave-like behaviour. PACS: 03.65-w, 03.65Pm, 03.65.-b