A preference-based semantics for CTD reasoning

In [8] the authors developed a logical system based on the definition of a new non-classical connective ⊗ capturing the notion of reparative obligation. The system proved to be appropriate for handling well-known contrary-to-duty paradoxes but no model-theoretic semantics was presented. In this paper we fill the gap and define a suitable possible-world semantics for the system for which we can prove soundness and completeness. The semantics is a preference-based non-normal one extending and generalizing semantics for classical modal logics.

Skhem-chertezh kolfonda "Zem - Trud" uchastok N 161

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Sapientia, 1986, Vol. XLI, nº 161 (número completo)

Contenido: La causa III : los principios de causalidad eficiente y final / Octavio N. Derisi -- El conocimiento trascendental de Dios y la metafísica de la naturaleza / Edgardo Castro -- Aportes para una caracterización del silogismo práctico / Federico Mihura Seeber -- El dinamismo ético-social y la educación del hombre según Aristóteles / Silvana Filippi -- Pintura y significación / Raúl Echauri -- Notas y comentarios -- Bibliografía

Diário da Constituinte [gravação de vídeo] : [programa n. 161]

O Artigo 12º do projeto da Comissão de Sistematização, que trata dos direitos do homem e da mulher, é um dos que tem recebido grande número de emendas. O Deputado Bernardo Cabral (PMDB-AM) comenta sobre as emendas. Informações sobre requisitos para validar as emendas populares. O Senador Fernando Henrique Cardoso (PMDB-SP) informa que nunca no Brasil houve uma Constituição com tanta participação popular. O Deputado Aldo Arantes (PC do B-GO) afirma que a mobilização popular e a pressão democrática são necessárias para que possamos ter uma Constituição avançada, pois os grupos conservadores exercem muita pressão na Assembleia Nacional Constituinte (ANC). Orestes Quércia, Governador de São Paulo, diz que é preciso que todos, de alguma forma, participem do processo de elaboração da Constituição. Engenheiros debatem propostas com os constituintes. Mateus Schneider, Presidente do Clube de Engenharia, esclarece que a intenção é contribuir com informações técnicas aos constituintes, deixando de lado a questão ideológica. O Deputado Flávio Palmier (PMDB-RJ) comenta que o Clube traz ideias para dialogar com os constituintes, sem se colocar como lobista. Propostas do Clube: definição de empresa nacional, proibição dos contratos de risco, reserva de mercado para informática, defesa dos recursos minerais do país. A Deputada Raquel Cândido (PFL- RO) considera que a proposta mais interessante dos engenheiros diz respeito à industrialização de matérias-primas no país. O Deputado Nelson Seixas (PMDB-SP) considera que o Brasil deve expandir as reservas de mercado.

Nutrient Enhanced Coastal Ocean Productivity (NECOP). Data report: CTD and hydrographic data, R/V Pelican cruise, April 3-11, 1993

The Nutrient Enhanced Coastal Ocean Productivity (NECOP) Program is a component of NOAA's Coastal Ocean Program. The central hypothesis of this research is: Anthropogenic nutrient inputs have enhanced coastal ocean productivity with subsequent impacts on coastal ocean water quality, living resource yields, and the global marine carbon cycle. The initial study area for this program is the Mississippi/Atchafalaya River Outflow and adjacent Louisiana shelf region.

Yeast screens identify the RNA polymerase II CTD and SPT5 as relevant targets of BRCA1 interaction.

BRCA1 has been implicated in numerous DNA repair pathways that maintain genome integrity, however the function responsible for its tumor suppressor activity in breast cancer remains obscure. To identify the most highly conserved of the many BRCA1 functions, we screened the evolutionarily distant eukaryote Saccharomyces cerevisiae for mutants that suppressed the G1 checkpoint arrest and lethality induced following heterologous BRCA1 expression. A genome-wide screen in the diploid deletion collection combined with a screen of ionizing radiation sensitive gene deletions identified mutants that permit growth in the presence of BRCA1. These genes delineate a metabolic mRNA pathway that temporally links transcription elongation (SPT4, SPT5, CTK1, DEF1) to nucleopore-mediated mRNA export (ASM4, MLP1, MLP2, NUP2, NUP53, NUP120, NUP133, NUP170, NUP188, POM34) and cytoplasmic mRNA decay at P-bodies (CCR4, DHH1). Strikingly, BRCA1 interacted with the phosphorylated RNA polymerase II (RNAPII) carboxy terminal domain (P-CTD), phosphorylated in the pattern specified by the CTDK-I kinase, to induce DEF1-dependent cleavage and accumulation of a RNAPII fragment containing the P-CTD. Significantly, breast cancer associated BRCT domain defects in BRCA1 that suppressed P-CTD cleavage and lethality in yeast also suppressed the physical interaction of BRCA1 with human SPT5 in breast epithelial cells, thus confirming SPT5 as a relevant target of BRCA1 interaction. Furthermore, enhanced P-CTD cleavage was observed in both yeast and human breast cells following UV-irradiation indicating a conserved eukaryotic damage response. Moreover, P-CTD cleavage in breast epithelial cells was BRCA1-dependent since damage-induced P-CTD cleavage was only observed in the mutant BRCA1 cell line HCC1937 following ectopic expression of wild type BRCA1. Finally, BRCA1, SPT5 and hyperphosphorylated RPB1 form a complex that was rapidly degraded following MMS treatment in wild type but not BRCA1 mutant breast cells. These results extend the mechanistic links between BRCA1 and transcriptional consequences in response to DNA damage and suggest an important role for RNAPII P-CTD cleavage in BRCA1-mediated cancer suppression.