Parafermions, ternary algebras and their associated superspace

Parafermions of order two are shown to be the fundamental tool to construct ternary superspaces related to cubic extensions of the Poincar\'e algebraComment: Talk given at the VIII. International Workshop Lie Theory and its applications in physics, 15 - 21 June 2009, Varna, Bulgari

Unitary representations of three dimensional Lie groups revisited: An approach via harmonic functions

Harmonic functions of the three dimensional Lie groups defined on certain manifolds related to the Lie groups themselves and carrying all their unitary representations are explicitly constructed. The realisations of these Lie groups are shown to be related with each other by either natural operations as real forms or In\"on\"u-Wigner contractions.Comment: The title was changed; More details are given for the constuction of harmonic functions 19 page

Color Lie algebras and Lie algebras of order F

The notion of color algebras is generalized to the class of F-ary algebras, and corresponding decoloration theorems are established. This is used to give a construction of colored structures by means of tensor products with Clifford-like algebras. It is moreover shown that color algebras admit realisations as q=0 quon algebras.Comment: LaTeX, 16 page

Effect of reaction control system jet-flow field interactions on a 0.015 scale model space shuttle orbiter aerodynamic characteristics

The effects of the reaction control system (RCS) jet-flow field interactions on the space shuttle orbiter system during entry are discussed. The primary objective of the test program was to obtain data for the shuttle orbiter configuration to determine control amplification factors resulting from jet interaction between the RCS plumes and the external flow over the vehicle. A secondary objective was to provide data for comparison and improvement of analytic jet interaction prediction techniques. The test program was divided into two phases; (1) force and moment measurements were made with and without RCS blowing, investigating environment parameters (R sub e, Alpha, Beta), RCS plume parameters (Jet pressure ratio, momentum ratio and thrust level), and geometry parameters (RCS pod locations) on the orbiter model, (2) oil flow visualization tests were conducted on a dummy balance at the end of the test

Electronic Components and Systems for the Control of the LHC Machine

The present estimation of the LHC underground control electronics gives a total of 10.400 crates of which some 4.400 will be connected to the machine control network. Electronic equipment will be housed under the cryostats, along the tunnel, in the alcoves and in the galleries parallel to the machine tunnel. In the regular arcs and in the dispersion suppressers areas the radiation level is expected to be relatively low. But, despite this low radiation level, radiation tests results obtained in previous years demonstrate that all electronic equipment needs to be qualified in a test facility providing an LHC like radiation environment. The radiation qualification of all tunnel electronics is essential in order to guaranty a reliable operation over the lifetime of the machine. The object of this paper is to give a review of the various electronic systems as they are planned today and to provide simulation results concerning the radiation environment of the CERN on-line test facility used for qualification of electronic component and systems. This paper is an update and an extension of the presentation made at the 5th Workshop on Electronics for LHC Experiments held in Snowmass in September 1999

Taxonomy and Zoogeography of \u3ci\u3eLemmus\u3c/i\u3e spp. (Rodentia: Arvicolinae), with Notes on Laboratory-Reared Lemmings

Lemmings of the genus Lemmus Link, 1795, have long attracted interest because of the high numerical densities attained at intervals by their populations. In earlier times, in northern Europe, such events seemed so remarkable as to be explained by some as a consequence of the animals\u27 having fallen from the sky (HaGSTROM 1749). During the last 25 years, lemmings have been the object of intensive ecological investigation in Eurasia and North America, although there has been no consensus concerning their taxonomic relationships. In 1959, a colony of brown lemmings from arctic Alaska was established in our laboratory, primarily to provide experimental animals for the study of zoonoses indigenous to arctic and subarctic North America. A colony of lemmings from Fennoscandia was similarly established in 1964. The lemmings proved to have advantages as laboratory animals, and at the same time the existence of the colonies permitted observations to be made on their biological characteristics and comparisons of chromosomes to be undertaken for the two forms and their hybrids. The results of these observations and comparisons, with a review of the zoogeography of Lemmus, are reported in the present paper

Cytogenetic Evidence for the Specific Distinction of an Alaskan Marmot, \u3ci\u3eMarmota broweri\u3c/i\u3e Hall and Gilmore (Mammalia: Sciuridae)

Cytogenetic studies based upon somatic cells (bone marrow) have disclosed that the marmot hitherto designated Marmota caligata broweri Hall and Gilmore, occurring in the Brooks Range of Arctic Alaska, differs from M. c. caligata (Eschscholtz) in number of chromosomes (2n=36 as compared with 2n=42 in M. caligata) and in proportions of chromosomal types. Typical karyograms for the two species are presented. It is concluded that the Brooks Range marmot is specifically distinct from M. caligata, the applicable name being Marmota broweri Hall and Gilmore. Also determined were diploid chromosome numbers for two other Nearctic species of marmots, M. flaviventris (Audubon and Bachman), with 42, and M. olympus (Merriam), with 40. It is suggested that M. broweri survived the last (Wisconsin) glaciations in the amphi-Beringian refugium, and that its closest affinities may be with one of the Eurasian species of Marmota

Cytogenetic Evidence for the Specific Distinction of an Alaskan Marmot, \u3ci\u3eMarmota broweri\u3c/i\u3e Hall and Gilmore (Mammalia: Sciuridae)

Cytogenetic studies based upon somatic cells (bone marrow) have disclosed that the marmot hitherto designated Marmota caligata broweri Hall and Gilmore, occurring in the Brooks Range of Arctic Alaska, differs from M. c. caligata (Eschscholtz) in number of chromosomes (2n=36 as compared with 2n=42 in M. caligata) and in proportions of chromosomal types. Typical karyograms for the two species are presented. It is concluded that the Brooks Range marmot is specifically distinct from M. caligata, the applicable name being Marmota broweri Hall and Gilmore. Also determined were diploid chromosome numbers for two other Nearctic species of marmots, M. flaviventris (Audubon and Bachman), with 42, and M. olympus (Merriam), with 40. It is suggested that M. broweri survived the last (Wisconsin) glaciations in the amphi-Beringian refugium, and that its closest affinities may be with one of the Eurasian species of Marmota