Much empirical support of self-control theory is based on the 24-item scale conceptualized by Grasmick and his colleagues. This study examined the dimensionality of the scale. Exploratory factor analysis, confirmatory factor analyses, and a structural equation model (SEM) produced results that are discordant with much prior research. The Grasmick et al. scale was not unidimensional, more comple...

Two classes of quantile regression estimation methods for the recursive structural equation models of Chesher (2003) are investigated. A class of weighted average derivative estimators based directly on the identification strategy of Chesher is contrasted with a new control variate estimation method. The latter imposes stronger restrictions achieving an asymptotic efficiency bound with respect ...

Every year the number of installed wind power plants in the world increases. The horizontal axis wind turbine is the most common type of turbine but there exist other types. Here, three different wind turbines are considered; the horizontal axis wind turbine and two different concepts of vertical axis wind turbines; the Darrieus turbine and the H-rotor. This paper aims at making a comparative s...

This paper presents an empirical investigation of a Social CRM performance model within an organizational perspective. A constraining factor regarding the implementation of Social CRM and the achievement of its objectives is the lack of an appropriate performance model. Little research has been conducted on a corresponding holistic approach and on the development of formative performance constr...

This paper presents a development methodology for complex robotic systems using the behavior-based control architecture iB2C (integrated Behavior-Based Control). It is shown how architectural principles support several behavior-based mechanisms, e. g. coordination mechanisms, behavior interaction, and hierarchical abstraction. Furthermore, design guidelines and structural patterns are presented...

The reform of the Stability and Growth Pact and the incorporation of “debt brake” rules into national legislation have heavily increased the importance of structural balances in economic policymaking in Europe. As defined by the European Commission, structural balances are calculated by subtracting the estimated cyclical component of government revenue and spending as well as certain temporary ...

The safety of construction workers is always a major concern at construction sites as the construction industry is inherently dangerous with many factors influencing worker safety. Several studies concluded that psychological factors such as workload, organizational relationships, mental stress, job security, and job satisfaction have significant effects on workers’ safety. However, research on...

In the present paper, a new 2-D Van der Polstructural oscillator model is introduced for the vortex induced vibrations of circular cylinders.The main purpose of this task is to control the recently introduced model by means of modern control definitions in state space. In order to control the system, the whole model is linearized about its equilibrium point by deriving state-space matrices. The...