This article concerns a perfect simulation algorithm for unmarked and marked Hawkes processes. The usual straightforward simulation algorithm suffers from edge effects, whereas our perfect simulation algorithm does not. By viewing Hawkes processes as Poisson cluster processes and using their branching and conditional independence structure, useful approximations of the distribution function for...

Colored Petri nets (CPNs) have been widely used as a mathematical modeling tool of dynamical systems , both for control and simulation. CPNs are very appealing and appear uncomplicated because of their simple graphical representation. However, as the CPN definition is very concise, specific processes have to be modeled with appropriate modules that sometimes are not easy to conceive. To broaden...

The teleological language in the target article is ill-advised, as it obscures the question of whether ecological and cultural inheritances are directed or random. The authors present a very broad palette of explanatory possibilities; evolutionary simulation models could help narrow down the processes important in a particular case. Examples of such models are offered in the areas of language c...

Natural gas usually contains significant amounts of acid gases when it is extracted from underground reservoirs. Therefore, it must be treated by appropriate processes to remove these acidic components. In this study, the simultaneous absorption of carbon dioxide and hydrogen sulfide from natural gas into diethanol amine solution was simulated using CFD. Absorption process was performed in a we...

Simulators play a very important role in the operation of thermal power plants and also in the design of control systems for these plants. To cater to this requirement elaborate methodologies have been developed to simulate thermal power plant processes in an interactive way. Due to the intensive computations involved, such simulators use one or more high through-put computers known as the simu...

The specific heat c of the Coulomb glass is studied by numerical simulations. Both the lattice model with various strengths of disorder, and the random-position model are considered for the one-to three-dimensional cases. In order to extend the investigations down to very low temperatures where the many-valley structure of the configuration space is of great importance we use a hybrid-Metropoli...

The germ cell nuclear factor (GCNF) is a member of the nuclear receptor super family of transcription factors. GCNF expression during gastrulation and neurulation is critical for normal embryogenesis in mice. GCNF represses expression of the POU domain transcription factor Oct4 during mouse post-implantation development in vivo. Oct4 is thus down-regulated during female gonadal development, whe...

We investigate the quantum state generated by optical parametric down-conversion in a $\chi^{(2) } $ medium driven two noncollinear light modes. The analysis shows emergence of multipartite, namely 3- or 4-partite, entangled states subset spatio-temporal modes process. These appear as bright spots against background fluorescence, providing an interesting analogy with phenomenology recently obse...