Quantum current algebra for the AdS(5) x S(5) superstring

The sigma model describing the dynamics of the superstring in the AdS(5) x S(5) background can be constructed using the coset PSU(2, 2 vertical bar 4)/SO(4, 1) x SO(5). A basic set of operators in this two dimensional conformal field theory is composed by the left invariant currents. Since these currents are not (anti) holomorphic, their OPE`s is not determined by symmetry principles and its computation should be performed perturbatively. Using the pure spinor sigma model for this background, we compute the one-loop correction to these OPE`s. We also compute the OPE`s of the left invariant currents with the energy momentum tensor at tree level and one loop.

Cytogenetics and embryology of Eupatorium laevigatum (Compositae)

Embryological studies indicate Eupatorium laevigatum to have Antennaria type diplospory with precocious embryony. The embryo sac is of the Polygonum type and the polar nuclei fuse before anthesis (maturation of the stamens). Endosperm development is autonomous and the central cell divides only after the initial stages of embryo formation. It is estimated that about 10% of the florets in anthesis contain an undivided egg which can be used for sexual reproduction. The study of microsporogenesis revealed abnormalities in chromosome pairing which result in the formation of univalents, bivalents, trivalents and higher polyvalents, with the consequent production of lagging chromosomes, unbalanced nuclei, micronuclei and sterile pollen. We found that, as represented by the material studied, E. laevigatum is an autohexaploid (2n = 6x = 60) in which each chromosome of a basic set of ten chromosomes is repeated six times and that E. laevigatum is an essentialy obligate apomictic.

Millennium development goals: progress towards the right to health in Latin america and the Caribbean

Includes bibliography

Latin America through the lens of social cohesion: selected indicators

Spanish document available at the Library

Structural assignments to the Mycoplasma genitalium proteins show extensive gene duplications and domain rearrangements

The parasitic bacterium Mycoplasma genitalium has a small, reduced genome with close to a basic set of genes. As a first step toward determining the families of protein domains that form the products of these genes, we have used the multiple sequence programs psi-blast and geanfammer to match the sequences of the 467 gene products of M. genitalium to the sequences of the domains that form proteins of known structure [Protein Data Bank (PDB) sequences]. PDB sequences (274) match all of 106 M. genitalium sequences and some parts of another 85; thus, 41% of its total sequences are matched in all or part. The evolutionary relationships of the PDB domains that match M. genitalium are described in the structural classification of proteins (SCOP) database. Using this information, we show that the domains in the matched M. genitalium sequences come from 114 superfamilies and that 58% of them have arisen by gene duplication. This level of duplication is more than twice that found by using pairwise sequence comparisons. The PDB domain matches also describe the domain structure of the matched sequences: just over a quarter contain one domain and the rest have combinations of two or more domains.

Privatisation in Poland:ten years after

The purpose of this article is to compare economic discussion on privatisation, expected privatisation outcomes and actual results in Poland. First it discusses the privatisation of state enterprises in the broader context of the economic transformation programme designed and introduced at the end of 1989 and the beginning of 1990. It examines the choice of privatisation methods, the political economy of privatisation and the three major policy issues: pace of privatisation, sequence of privatisation and the authority to initiate and carry out privatisation. The final section compares privatisation blueprints and actual results. The appendix presents a detailed technical guide to the privatisation methods in Poland and a basic set of figures illustrating the outcome.

Spectra of Ruelle Transfer Operators for Contact Flows

In this survey article we discuss some recent results concerning strong spectral estimates for Ruelle transfer operators for contact flows on basic sets similar to these of Dolgopyat obtained in the case of Anosov flows with C1 stable and unstable foliations. Some applications of Dolgopyat's results and the more recent ones are also described.

A set of basic circuits /

"October 21, 1958"

Hand receipt covering contents of components of end item (COEI), basic issue items (BII), and additional authorization list (AAL) for radio test set AN/PRM-34 (NSN 6625-01-094-5646).

"2 September 1983."

Hand receipt covering contents of components of end item (COEI), basic issue items (BII), and additional authorization list (AAL) for radiac set AN/PDR-56F (NSN 6665-01-113-9530).

"28 January 1983."

Operator's manual including basic issue items list : test set, generator, and voltage regulator, automotive (Allen Electric and Equipment Co. model 30-82) (4910-270-3780).

"April 1965."

Hand receipt covering contents of Components of End Item (COEI), Basic Issue Items (BII), and Additional Authorization List (AAL) for armament repair shop set (4933-01-082-1663).

"October 1982."

Hand receipt covering contents of Components of End Item (COEI), Basic Issue Items (BII), and Additional Authorization List (AAL) for computer set, field artillery, general (1220-01-082-1646) and computer set, field artillery, missile (1220-01-082-1647).

"May 1983."

Hand receipt manual covering system components of end item (COEI), basic issue items (BII), and additional authorization list (AAL) for CHAPARRAL M48A2 Air Defense Guided Missile System, AN/TSM-95A organizational maintenance shop set, and AN/TSM-96A support maintenance shop set.

"December 1984."

Hand receipt covering contents of components of end item (COEI), basic issue items (BII), and additional authorization list (AAL) for radio set AN/GRC-193A (NSN 5820-01-133-4195).

"14 February 1986."