New W-isotope evidence for rapid terrestrial accretion and very early core formation

The short-lived Hf-182-W-182-isotope system is an ideal clock to trace core formation and accretion processes of planets. Planetary accretion and metal/silicate fractionation chronologies are calculated relative to the chondritic Hf-182-W-182-isotope evolution. Here, we report new high-precision W-isotope data for the carbonaceous chondrite Allende that are much less radiogenic than previously reported and are in good agreement with published internal Hf-W chronometry of enstatite chondrites. If the W-isotope composition of terrestrial rocks, representing the bulk silicate Earth, is homogeneous and 2.24 epsilon(182W) units more radiogenic than that of the bulk Earth, metal/silicate differentiation of the Earth occurred very early. The new W-isotope data constrain the mean time of terrestrial core formation to 34 million years after the start of solar system accretion. Early terrestrial core formation implies rapid terrestrial accretion, thus permitting formation of the Moon by giant impact while Hf-182 was still alive. This could explain why lunar W-isotopes are more radiogenic than the terrestrial value. Copyright (C) 2002 Elsevier Science Ltd.

Aggregated personality, climate and demographic factors as predictors of departmental shrinkage

The present study investigated how demographic, personality, and climate variables act to predict departmental theft. Participants in the current field survey were 153 employees from 17 departments across two stores. The results of confirmatory factor analyses supported the construct validity of the Big Five Inventory (John, Donahue, & Kentle, 1991) and the Occupational Climate Questionnaire (Furnham & Gunter, 1997) in UK work settings. The results of regression analysis indicate that the variability in departmental theft is accountable in terms of a linear combination of demographic, personality, and climate factors. We concluded that an expanded theoretical perspective (utilizing demographic, personality, and climate variables) explained more variance than might otherwise be expected from any single perspective. Indeed, climate, personality, and demographic variables operated legitimately at the departmental level. Finally, we explained aggregated personality as a form of social interaction which is the by-product of individual differences.

Parenteral and mucosal delivery of a novel multi-epitope M protein-based group A streptococcal vaccine construct: investigation of immunogenicity in mice

Primary vaccine strategies against group A streptococci (GAS) have focused on the M protein-the target of opsonic antibodies important for protective immunity. We have previously reported protection of mice against GAS infection following parenteral delivery of a multi-epitope vaccine construct, referred to as a heteropolymer. This current report has assessed mucosal (intranasal (i.n.) and oral) delivery of the heteropolymer in mice with regard to the induction and specificity of mucosal and systemic antibody responses, and compared this to parenteral delivery. GAS-specific IgA responses were detected in saliva and gut upon i.n. and oral delivery of the heteropolymer co-administered with cholera toxin B subunit, respectively. High titre serum IgG responses were elicited to the heteropolymer following all routes of delivery when administered with adjuvant. Moreover, as with parenteral delivery, serum IgG antibodies were detected to the individual heteropolymer peptides following i.n. but not oral delivery. These data support the potential of the i.n. route in the mucosal delivery of a GAS vaccine. (C) 2002 Elsevier Science Ltd. All rights reserved.

Cuticular hydrocarbons of Drosophila birchii and D-serrata: Identification and role in mate choice in D-serrata

The cuticular hydrocarbon compositions of two sympatric species of Australian Drosophila in the montium subgroup of the melanogaster group that use cuticular hydrocarbons in mate recognition have been characterized. Drosophila birchii has 34 components in greater than trace amounts, with a carbon number range of C-20 to C-33. Drosophila serrata has 21 components above trace level and a carbon number range of C-24 to C-31. These two species share eight hydrocarbon components, with all but two of them being monoenes. For both species, the (Z)-9-monoenes are the predominant positional isomer. The hydrocarbons of D. birchii are n-alkanes, n-alkenes (Z)-5-, (Z)-7-, (Z)-9-, and (Z)-11-), low to trace levels of homologous (Z,Z)-7,11- and (Z,Z)-9,13-dienes; and trace amounts of (Z,Z)-5,9- C-25:2, a major component of D. serrata. Only one methyl branched hydrocarbon was detected (2-methyl C-28), and it occurred at very low levels. The hydrocarbons of D. serrata are dominated by a homologous series of (Z,Z)-5,9-dienes, and notably, are characterized by the apparent absence of n-alkanes. Homologous series of (Z)-5-, (Z)-7-, and (Z)-9- alkenes are also present in D. serrata as well as 2-methyl alkanes. Drosophila serrata females display strong directional mate choice based on male cuticular hydrocarbons and prefer D. serrata males with higher relative abundances of the 2-methyl alkanes, but lower relative abundances of (Z,Z)-5,9- C-24:2 and (Z)-9-C-25:1.

James W. Gerard: His image of imperial Germany, 1913-1918

The subject of this study was a typical, if in some respects well qualified, U.S. ambassadorial appointee for his time, the early twentieth century: an attorney, judge, and politician who served competently in his one diplomatic assignment, in Berlin, before returning to private life.—Ed.

Texto para discuss??o 43:os especialistas em pol??ticas p??blicas e gest??o governamental: avalia????o de sua contribui????o para pol??ticas p??blicas e trajet??ria profissional

Este relat??rio apresenta os resultados de uma pesquisa piloto de avalia????o sobre a contribui????o dos Especialistas em Pol??ticas P??blicas e Gest??o Governamental (EPPGGs), doravante tamb??m denominados apenas gestores, para Administra????o P??blica Federal (APF). Uma das quest??es centrais da pesquisa consistiu na determina????o da exist??ncia ou n??o de uma atua????o t??pica dos gestores na APF que os singularize qua membros de uma carreira espec??fica. S?? se pode falar da contribui????o dos gestores enquanto tal, em contraposi????o ?? contribui????o de uma s??rie de indiv??duos isolada e desarticuladamente, se for poss??vel diferenciar institucionalmente as formas de atua????o caracter??sticas dos membros da carreira. Assim, o fio condutor da investiga????o, de acordo com a problem??tica exposta acima, foi pautado pela id??ia de institucionaliza????o da carreira de EPPGG

Caf?? com debate: lideran??a do professor-tutor

A Escola Nacional de Administra????o P??blica (ENAP) recebeu os professores Michel Bourdon, da Canada School of Public Service (CSPS), e Andrea Filatro, das universidades Paulista e Federal de Juiz de Fora. A atividade, realizada no Dia Nacional da Educa????o a Dist??ncia (EAD), teve como objetivo promover uma reflex??o sobre o papel do professor-tutor como l??der de processos de aprendizagem

M??dulo 1 - atua????o do professor-tutor em organiza????es p??blicas: curso tutoria on-line em organiza????es p??blicas

Este documento trata de: a educa????o continuada do servidor p??blico, desenvolvimento de compet??ncias nas organiza????es p??blicas, o papel das escolas de governo na forma????o do servidor p??blico, a EaD como estrat??gia de educa????o continuada, educa????o a dist??ncia na Enap, bases de atua????o da cgead, o desenvolvimento das compet??ncias de tutoria

M??dulo 2 - o professor-tutor e as tecnologias: tutoria on-line em organiza????es p??blicas

Este documento trata de M??dulo 2 - o professor-tutor, Introdu????o, as tecnologias da intelig??ncia e o ciberespa??o, mapeando as tecnologias da educa????o a dist??ncia, ambientes virtuais de aprendizagem (AVA) e sistemas de gerenciamento de aprendizagem (SGA), o Moodle, compet??ncias tecnol??gicas da tutoria, refer??ncias, finalizando o m??dulo