Constitutive modeling of clay is an important research in geotechnical engineering. It is difficult to use precise mathematical expressions to approximate stress-strain relationship of clay. Artificial neural network (ANN) and support vector machine (SVM) have been successfully used in constitutive modeling of clay. However, generalization ability of ANN has some limitations, and application of...

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...

background and objectives: studies of the relationship between personal qualities and job consequences usually find poor and inconsistent correlations. it is suggested that the reason may lie in ignorance of some modifying factors mediating such relationship. the perceived control has attracted much attention as a candidate factor. this study aimed to examine the mediating role of the perceived...

UML is a widespread software modeling language. It can be a good candidate for modeling non-software systems, such as enterprise systems. While several proposals have been formulated, they are either incomplete or complex. In this paper we propose a modeling approach that is based on the basic object-orientation concepts. In particular we stress the use of instance models as a key concept.