Predavanje “Fisher information”
Predavanje “Fisher Information” održat će profesor Heriberto Cabezas, PhD., FAIChE, BCEEM, sa Sveučilišta Miskolc u Mađarskoj u četvrtak 12. svibnja 2022. u 11 sati u Vijećnici Sveučilišta na prvom katu. Predavanje je zatvoreno za javnost.
Heriberto Cabezas, PhD., FAIChE, BCEEM
University of Miskolc
Research Institute for Applied Earth Sciences
Miskolc, Hungary
&
Senior Science Advisor (Ret.)
U.S. Environmental Protection Agency
Office of Research and Development
Cincinnati, Ohio, USA
Fisher Information
The lecture will focus on exploring the fundamentals of Fisher information and its application. Fisher information is a measure of the information obtainable by an observer from data obtained from the observation of reality. However, information is obtainable only when there are patterns or features to observe, and these only exist when there is order. For example, a system in perfect disorder has no patterns or features from which information can be obtained, and the Fisher information obtained from such a system would approach zero. Conversely, a system in perfect order would have very well-defined patterns and features, and the Fisher information obtainable from the system would approach a maximum, infinity in the limit. Hence, Fisher information is a measure of order in dynamic systems. To the extent that entropy is a measure of disorder, as the entropy of the universe increases with time according to the Second Law of Thermodynamics, the Fisher information must decrease. The relation of Fisher information to the 2nd and 3rd Laws of Thermodynamics will be explored. This is followed the application of Fisher information to the behavior of dynamic systems, including molecular systems, ecosystems, socio political systems, and pandemics. This last application is very timely as the fast pace of the COVID-19 pandemic has made it necessary to make decisions quickly, even with less-than-ideal information.
Fisher Information Heriberto Cabezas, PhD., FAIChE, BCEEM
University of Miskolc Research Institute for Applied Earth Sciences Miskolc, Hungary & Senior Science Advisor (Ret.) U.S. Environmental Protection Agency Office of Research and Development Cincinnati, Ohio, USA Abstract The lecture will focus on exploring the fundamentals of Fisher information and its application. Fisher information is a measure of the information obtainable by an observer from data obtained from the observation of reality. However, information is obtainable only when there are patterns or features to observe, and these only exist when there is order. For example, a system in perfect disorder has no patterns or features from which information can be obtained, and the Fisher information obtained from such a system would approach zero. Conversely, a system in perfect order would have very well-defined patterns and features, and the Fisher information obtainable from the system would approach a maximum, infinity in the limit. Hence, Fisher information is a measure of order in dynamic systems. To the extent that entropy is a measure of disorder, as the entropy of the universe increases with time according to the Second Law of Thermodynamics, the Fisher information must decrease. The relation of Fisher information to the 2nd and 3rd Laws of Thermodynamics will be explored. This is followed the application of Fisher information to the behavior of dynamic systems, including molecular systems, ecosystems, socio political systems, and pandemics. This last application is very timely as the fast pace of the COVID-19 pandemic has made it necessary to make decisions quickly, even with less-than-ideal information.