Sanitary progress during the last twenty-five years-and in the next

Artificial Intelligence: The Next Twenty-Five Years

We know—with a title like that, you’re expecting something awful. You’re on the lookout for fanciful prognostications about technology: Someday computers will fit in a suitcase and have a whole megabyte of memory. And you’re wary of lurid Hollywood visions of “the day the robots come”: A spiderlike machine pins you to the wall and targets a point four inches behind your eyes with long and distu...

Twenty-five years of progress.

Thalassemia in Iran in Last Twenty Years: the Carrier Rates and the Births Trend

Background: Iran is one of the countries located on “the thalassemia belt” with a significant annual number of thalassemia new births. Given the importance of thalassemia prevention, a program to this effect was approved in Iran in 1995. Screening of carrier couples and prenatal diagnosis were the two main elements of this program. In the present study, the authors have tried to address the imp...

Progress in thermal comfort research over the last twenty years.

Climate change and the urgency of decarbonizing the built environment are driving technological innovation in the way we deliver thermal comfort to occupants. These changes, in turn, seem to be setting the directions for contemporary thermal comfort research. This article presents a literature review of major changes, developments, and trends in the field of thermal comfort research over the la...

Twenty-Five Years of Progress in the Three-Nucleon Problem

Twenty-five years ago the International Few-Body Conference was held in Quebec City. It became very clear at that meeting that the theoretical situation concerning the He and H ground states was confused. A lack of computational power prevented converged brute-force solutions of the Faddeev or Schrödinger equations, both for bound and continuum states of the three-nucleon systems. Pushed by exp...