Wigner Rule (Also Known as Spin-Conservation Rule)

Although it is undecidable whether a one-dimensional cellular automaton obeys a given conservation law over its limit set, it is however possible to obtain sufficient conditions to be satisfied by a one-dimensional cellular automaton to be eventually number-conserving. We present a preliminary study of two-input one-dimensional cellular automaton rules called eventually number-conserving cellular automaton rules whose limit sets, reached after a number of time steps of the order of the cellular automaton size, consist of states having a constant number of active sites. In particular, we show how to find rules having given limit sets satisfying a conservation rule. Viewed as models of systems of interacting particles, these rules obey a kind of Darwinian principle by either annihilating unnecessary particles or creating necessary ones.

Download Full-text

Excitation Transfer of Helium 31P, D →33D by Atomic Collisions–Violation of Wigner's Spin Conservation Rule

Journal of the Physical Society of Japan ◽

10.1143/jpsj.50.3476 ◽

1981 ◽

Vol 50 (10) ◽

pp. 3476-3481 ◽

Cited By ~ 11

Author(s):

Takashi Fujimoto ◽

Kuniya Fukuda

Keyword(s):

Excitation Transfer ◽

Atomic Collisions ◽

Conservation Rule

Download Full-text

Breakdown of thek-conservation rule in quantized Auger recombination in Si1−xGexnanocrystals

Physical Review B ◽

10.1103/physrevb.86.155316 ◽

2012 ◽

Vol 86 (15) ◽

Cited By ~ 15

Author(s):

Kei Ueda ◽

Takeshi Tayagaki ◽

Masatoshi Fukuda ◽

Minoru Fujii ◽

Yoshihiko Kanemitsu

Keyword(s):

Auger Recombination ◽

Conservation Rule

Download Full-text

Spin symmetry conservation rule in free radical reactions

Chemical Physics Letters ◽

10.1016/0009-2614(75)85532-1 ◽

1975 ◽

Vol 34 (3) ◽

pp. 434-437 ◽

Cited By ~ 10

Author(s):

Kizashi Yamaguchi

Keyword(s):

Free Radical ◽

Spin Symmetry ◽

Radical Reactions ◽

Free Radical Reactions ◽

Conservation Rule

Download Full-text

ETHICS AND BASIC PRINCIPLES OF RESTORING HISTORICAL STONE MONUMENTS

Protection of cultural heritage ◽

10.35784/odk.1083 ◽

2019 ◽

pp. 175-184

Author(s):

Jadwiga W. Łukaszewicz

Keyword(s):

Building Stone ◽

Ethical Guidelines ◽

Work Of Art ◽

Basic Principles ◽

Stone Monuments ◽

Historical Monuments ◽

Historic Monuments ◽

Materials Used ◽

Conservation Rule

The paper discusses ethical guidelines in relation to the conservation of historical monuments made of stone. The presented rules consider the building stone specificity and its susceptibility to various corrosion factors and the character of deteriorated areas in that kind of historic monuments. The basic conservation rule sounding Primum non nocere is deconvoluted to more particular principles like: (i) to preserve authentic historical matter as a carrier of artistic, scientific and historical value of the object, (ii) to provide minimal scale of intervention, (iii) to provide the reversibility of the methods and particularly materials used from conservation or reconstruction works, (iv) to provide distinguishability of reconstructions parts and (v) to provide the integrity of the work of art. The adaptability of these particular rules to the of conservation of stone artistic artefacts is also presented.

Download Full-text