A formula is a contingent logical truth when it is true in every model M but, for some model M , false at some world of M . We argue that there are such truths, given the logic of actuality. Our argument turns on defending Tarski’s definition of truth and logical truth, extended so as to apply to modal languages with an actuality operator. We argue that this extension is the philosophically pro...

3-Arylsubstituted derivatives of 2H,3H,4H,7Hand 1H,2H,3H,4H-[1,2,4]triazolo[4,5a]pyrimidin-4-ones were synthesized from 2-arylidenehydrazino-6-methyl-4-pyrimidones by treatment with acetic anhydride. The structures of the starting compounds and of the isomeric diN-acetylated reaction products were established by NMR.

Outside the Campus Center the sky was a clear blue, brushed occasionally by white. The sun glowed down on a perfect day, a lazy, breezy day. You could hear the fountain's unceasing din above the sound of people talking and a dog's bark. An excited squeal broke out briefly from one of the many groups sealed and standing idle on the podium and around the fountain. It was noon and many students we...

Sistemele de monitorizare pe scară largă permit colectarea eficientă a datelor din câmp la rezoluții temporale și spațiale ridicate. Un exemplu relevant îl constituie aplicarea acestor sisteme în domeniul monitorizării infrastructurilor de transport al produselor petroliere pentru prevenirea scurgerilor și a accesului neautorizat, ce pot cauza daune de mediu și economice semnificative. Lucrarea...

Many animals, including humans, rely on active tactile sensing to explore the environment and negotiate obstacles, especially in the dark. Here, we model a descending neural pathway that mediates short-latency proprioceptive information from a tactile sensor on the head to thoracic neural networks. We studied the nocturnal stick insect Carausius morosus, a model organism for the study of adapti...

iv Acknowledgments I would like to express my gratitude to my adviser, Dr. Ou Bai for his continuous support throughout in my study and research. His guidance and encouragement have helped me pursuing this exciting line of research. Throughout the entire project he has encouraged me to develop independent thinking and research skills. I am extremely thankful to Dr. Kathryn Holloway for giving m...

Introduction For several decades now, the study of resilience has held a prominent place in our efforts to understand the relations among adversity, development and adaptation. The papers in this collection emerge as the study of resilience enters a new and conflicted era. Above the din of critics who call for the resignation of resilience as a tautological, redundant and intellectually static ...