6,955 research outputs found
On the Impact of Information Technologies on Society: an Historical Perspective through the Game of Chess
The game of chess as always been viewed as an iconic representation of
intellectual prowess. Since the very beginning of computer science, the
challenge of being able to program a computer capable of playing chess and
beating humans has been alive and used both as a mark to measure
hardware/software progresses and as an ongoing programming challenge leading to
numerous discoveries. In the early days of computer science it was a topic for
specialists. But as computers were democratized, and the strength of chess
engines began to increase, chess players started to appropriate to themselves
these new tools. We show how these interactions between the world of chess and
information technologies have been herald of broader social impacts of
information technologies. The game of chess, and more broadly the world of
chess (chess players, literature, computer softwares and websites dedicated to
chess, etc.), turns out to be a surprisingly and particularly sharp indicator
of the changes induced in our everyday life by the information technologies.
Moreover, in the same way that chess is a modelization of war that captures the
raw features of strategic thinking, chess world can be seen as small society
making the study of the information technologies impact easier to analyze and
to grasp
Gardner's Minichess Variant is solved
A 5x5 board is the smallest board on which one can set up all kind of chess
pieces as a start position. We consider Gardner's minichess variant in which
all pieces are set as in a standard chessboard (from Rook to King). This game
has roughly 9x10^{18} legal positions and is comparable in this respect with
checkers. We weakly solve this game, that is we prove its game-theoretic value
and give a strategy to draw against best play for White and Black sides. Our
approach requires surprisingly small computing power. We give a human readable
proof. The way the result is obtained is generic and could be generalized to
bigger chess settings or to other games
The State of the Art in Hadron Beam Cooling
Cooling of hadron beams (including heavy-ions) is a powerful technique by
which accelerator facilities around the world achieve the necessary beam
brightness for their physics research. In this paper, we will give an overview
of the latest developments in hadron beam cooling, for which high energy
electron cooling at Fermilab's Recycler ring and bunched beam stochastic
cooling at Brookhaven National Laboratory's RHIC facility represent two recent
major accomplishments. Novel ideas in the field will also be introduced.Comment: 7 pages, 7 figures, ICFA-HB2008 Invited presentatio
Determination of the pure silicon monocarbide content of silicon carbide and products based on silicon carbide
Experience has shown that different methods of analysis of SiC products give different results. Methods identified as AFNOR, FEPA, and manufacturer P, currently used to detect SiC, free C, free Si, free Fe, and SiO2 are reviewed. The AFNOR method gives lower SiC content, attributed to destruction of SiC by grinding. Two products sent to independent labs for analysis by the AFNOR and FEPA methods showed somewhat different results, especially for SiC, SiO2, and Al2O3 content, whereas an X-ray analysis showed a SiC content approximately 10 points lower than by chemical methods
Universal Critical Behavior of Noisy Coupled Oscillators
We study the universal thermodynamic properties of systems consisting of many
coupled oscillators operating in the vicinity of a homogeneous oscillating
instability. In the thermodynamic limit, the Hopf bifurcation is a dynamic
critical point far from equilibrium described by a statistical field theory. We
perform a perturbative renormalization group study, and show that at the
critical point a generic relation between correlation and response functions
appears. At the same time the fluctuation-dissipation relation is strongly
violated.Comment: 10 pages, 1 figur
- …