The search for phase transitions is a hot topic in atomic and nuclear physics. Several different phase transitions are observed/or expected to be observed like 3He to 4He superfluid, Bose-Einstein condensation, liquid to gas nuclei and hadronic matter to Quark Gluon Plasma (QGP). The QGP phase transition is predicted by lattice QCD and several QGP signals have been suggested[1], although no con...

One of the most time consuming activities in new product development is associated with reliability assessment and qualification. This is defined as a process to verify whether the anticipated reliability is indeed achieved under actual life cycle loads for some specified length of time. Reliability assessment and qualification is usually accomplished by testing under accelerated loads to achie...

The use of software-controlled gastrointestinal (GI) stimulators to regulate gastric activity promises to revolutionize treatment of GI-related diseases. Because this software area is relatively young, it is difficult to propose a concrete and detailed realization of a product line in GI. However, a comprehensive analysis of the domain will identify the main requirements and problems, which sho...

Because product development processes now take place within a geographically diverse international community, global geographic issues relating to both physical and human elements of geography must be considered to ensure optimal deployment through means of virtual product development. Virtual product development is a strategy that preplans the product development process through simulation. Ge...

In order to reduce the unbalance vibration of the rotating machinery automatically during the work process, a new type of liquid-transfer active balancing system was proposed. In the system, a balancing disc divided into four liquid storage chambers was mounted on the rotor. When the unbalance response of the rotating machinery was higher than the limiting value, compressed air was injected to ...

We have used the OSSE observations of the starburst galaxies NGC 253 and M82 to obtain upper limits to the Type Ia and Ib supernova rates in these galaxies. Monte Carlo simulations of randomly occurring supernova events in NGC 253 and M82 were performed to evaluate the significance of our upper limit to the 0.847 and1.238 MeV Co gamma-ray line fluxes on the supernova rate from these two galaxie...

Abstract — In this paper we design a new type of hydraulic Energy-Regenerative vibration active suspension system. The system has continuous change of damping force from zero to the maximum value and high energy conversion efficiency. Also we designed and simulated an adaptive back-stepping sliding mode variable structure controller. The simulation results show the designed controller has good ...

A brief overview of modeling and simulation (m& s) technology is presented, describing the development of m&s in a variety of industrial contexts, such as aerospace, manufacturing, and process industries. Typically this occurs in phases: introduction of m& s, shaping m&s to meet an industry’s needs, and maturation. It is demonstrated that in industry after industry m& s has become increasingly ...

Coarse-grained beaches are particularly prevalent in the UK, composed of accumulations of either gravel, or mixed sand and gravel sediments. Understanding and predicting their morphological behaviour in response to short-term and long-term forcing has been the subject of recent research. Despite the focus on sandy beaches, it is important to understand that the balance of processes that govern ...

Objectives The objective of this work is to develop a continuum sensitivity finite element analysis for the robust design of multi-stage metal forming processes in aircraft manufacturing. The computational forming design simulator being developed is applied to industrial forming design and provides the means to select the sequence of deformation processes, design the dies and preforms for each ...