The Latest Word, December 2003

Newsletter by IPERS about Iowa Public Employees’ Retirement System news for retirees.

The Latest Word, September 2003

Newsletter by IPERS about Iowa Public Employees’ Retirement System news for retirees.

The Latest Word, June 2003

Newsletter by IPERS about Iowa Public Employees’ Retirement System news for retirees.

The Latest Word, March 2003

Newsletter by IPERS about Iowa Public Employees’ Retirement System news for retirees.

The Latest Word, December 2002

Newsletter by IPERS about Iowa Public Employees’ Retirement System news for retirees.

The Latest Word, September 2002

Newsletter by IPERS about Iowa Public Employees’ Retirement System news for retirees.

The Latest Word, June 2002

Newsletter by IPERS about Iowa Public Employees’ Retirement System news for retirees.

The Latest Word, March 2004

Newsletter by IPERS about Iowa Public Employees’ Retirement System news for retirees.

The Latest Word, Winter 2004

Newsletter by IPERS about Iowa Public Employees’ Retirement System news for retirees.

The Latest Word, Summer 2012

Newsletter by IPERS about Iowa Public Employees’ Retirement System news for retirees.

Dispersal (Entropy) and Recognition (Information) as Foundations of Emergence and Dissolvence

The objective of this essay is to reflect on a possible relation between entropy and emergence. A qualitative, relational approach is followed. We begin by highlighting that entropy includes the concept of dispersal, relevant to our enquiry. Emergence in complex systems arises from the coordinated behavior of their parts. Coordination in turn necessitates recognition between parts, i.e., information exchange. What will be argued here is that the scope of recognition processes between parts is increased when preceded by their dispersal, which multiplies the number of encounters and creates a richer potential for recognition. A process intrinsic to emergence is dissolvence (aka submergence or top-down constraints), which participates in the information-entropy interplay underlying the creation, evolution and breakdown of higher-level entities.

Molecular basis of messenger RNA recognition by the specific bacterial repressing clamp RsmA/CsrA.

Proteins of the RsmA/CsrA family are global translational regulators in many bacterial species. We have determined the solution structure of a complex formed between the RsmE protein, a member of this family from Pseudomonas fluorescens, and a target RNA encompassing the ribosome-binding site of the hcnA gene. The RsmE homodimer with its two RNA-binding sites makes optimal contact with an 5'-A/UCANGGANGU/A-3' sequence in the mRNA. When tightly gripped by RsmE, the ANGGAN core folds into a loop, favoring the formation of a 3-base-pair stem by flanking nucleotides. We validated these findings by in vivo and in vitro mutational analyses. The structure of the complex explains well how, by sequestering the Shine-Dalgarno sequence, the RsmA/CsrA proteins repress translation.

Guia per convertir documents Microsoft Word 2003 i 2007 a PDF

Aquest document mostra el procés de transformació d'un arxiu de Microsoft Word a un document PDF de la forma més accessible possible.

Guia de Microsoft Word 2003

Aquest document és una guia de recomanacions per crear contingut accessible amb el programa Microsoft Word 2003.