background : this research aimed to identify midwifery roles in iran and the world to offer suggestions about desired roles of a midwife in health care service delivery system, considering the goals of national plan for maternal health. methods: this study was conducted using a mixed (triangulation) methodology in 3 steps. first, the roles of a midwife were extracted using documents existed in ...

There are rumours that Islamic economic systems exist in developed nations with sizable Muslim populations. I have made an effort to regard the system primarily as a theoretical construct organize perspectives of many social philosophers on various significant concerns other structures. The Holy Quran and modern science serve their respective grounds, regardless theories linked these beliefs. I...

A new formal approach based on partial order set (poset) theory is proposed to analyze the space requirement of discrete-event parallel simulation. We divide the memory required by a simulation problem into memory to model the states of the real-world system, memory to maintain a list of future event occurrences, and memory required to implement the event synchronization protocol. We establish ...

The temporal evolution of real world systems can mathematically be described by dynamical systems. Global, topological information on their long term behavior is given by corresponding invariant sets, which typically have a very complex structure. We describe a new, set oriented and hierarchical approach for the visualization of invariant sets and accompanying probability measures, which give s...