Having dreams is .... normal. We also see people having clear goals ... and it's quite interesting... looking like a more organised person which is dreaming. ... on and on and on. And the truth is ... that the human being could be defined as a machine ... that is always coming up with new and new desires. I look into my past ... and i see myself saying in front of the Universe ... i want that and that ... and that. And ... i can't stop myself ... even if i know that same as Budha said ... the desire itself is the source of all the human pain. I smile realising how i've wasted my life chasing for on million contradictory desires. ... but also honestly realising ... this is a non ending story. So ... starting a weird process of self therapy... analysing all those desires ... especially the ones that obsessed myself ... I've finally concluded that in fact ... i want more to "taste" those desires. It was like i loved Rolls Royce... and i wanted to drive such an amazing car ... but i did not really wanting to pay such a huge price for this car .... the maintenance ... the taxes …the insurance etc. In fact ... all i wanted was to ... drive it ... for a while ... and enjoy the sensation of doing it. And the list of similar desires ... was so damn long ... So ... i wanted that ... and that and that ... hoping in fact that ... i'll get some sensations... which will bring me nice vibes into my soul. But .... It was only one problem. I did not really wanted to ... pay the price. Almost ... for any of those desires which were dominating obsessively my existence. Time was passing ... and i was somehow ending all the time ... being sad and disappointed.... cause my desires did not became real. Not all of them ... but many. But ... i've also noticed with some of those weird desires which i had .... that they were not what I've imagined. It was indeed all ... illusory. I could simple try and test all ... simple paying a price ... like renting the Rolls ... and see if i really want such a car. It was not that i could afford it ... but i could try to taste it ... by paying a minimum price for that ... only to understand better if that was a good path to follow or not. I had to insert ... a coin. But i was not really ready to do it. Yes ... not even pay ... a vey little price for it. I was just dreaming ... so nicely pretending i have clear goals with my life ... but all i was doing was to allow being dominated by those illusory desires. And this moment when i've understood i have only 3 choices... my life changed. Firstly ... I could ... stop dreaming. Or i could pay the price of getting that desire ... and stop being so stupid ... believing that a great dream ... costs 2 pennies. Or ... i could simple .... "taste" a little bit that desire .... see if i really want it ... and then decide if i delete that obsession from my mind ... or not. So ... all was about ... insert coin ... paying the price for it ... or .... simply stop myself dreaming with my eyes opened... like an idiot.

Middle-schooler Bryan wakes up to find that his life has become a video game, with bullies to beat, races to run, puzzles to solve, and much more at stake.

Petri nets are a model for the analysis of concurrent systems.

This series is endorsed by Cambridge International Examinations and is part of Cambridge Maths. This teacher's resource for stage 1 will fully support teachers to get the best from their learners and effectively use the learner's book and games book. Detailed lesson plans based on the course objectives are offered, along with additional activity ideas. Teachers will be guided to formatively assess their learners' understanding. They will have the confidence to engage the class in mathematical discussion and encourage learners to justify answers and make connections between ideas. Answers to the learner's book and all photocopiable sheets required are provided. All book content, plus more, is included on the CD for convenience.

The two-volume set originates from the Advanced Course on Petri Nets held in Dagstuhl, Germany in September 1996; beyond the lectures given there, additional chapters have been commissioned to give a well-balanced presentation of the state of the art in the area. Together with its companion volume "Lectures on Petri Nets II: Applications" this book is the actual reference for the area and addresses professionals, students, lecturers, and researchers who are - interested in systems design and would like to learn to use Petri nets familiar with subareas of the theory or its applications and wish to view the whole area - interested in learning about recent results presented within a unified framework - planning to apply Petri nets in practical situations - interested in the relationship of Petri nets to other models of concurrent systems.