488 research outputs found
Rings Over Which Cyclics are Direct Sums of Projective and CS or Noetherian
R is called a right WV -ring if each simple right R-module is injective
relative to proper cyclics. If R is a right WV -ring, then R is right uniform
or a right V -ring. It is shown that for a right WV-ring R, R is right
noetherian if and only if each right cyclic module is a direct sum of a
projective module and a CS or noetherian module. For a finitely generated
module M with projective socle over a V -ring R such that every subfactor of M
is a direct sum of a projective module and a CS or noetherian module, we show M
= X \oplus T, where X is semisimple and T is noetherian with zero socle. In the
case that M = R, we get R = S \oplus T, where S is a semisimple artinian ring,
and T is a direct sum of right noetherian simple rings with zero socle. In
addition, if R is a von Neumann regular ring, then it is semisimple artinian.Comment: A Para\^itre Glasgow Mathematical Journa
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Circulating anti-angiogenic factors during hypertensive pregnancy and increased risk of respiratory distress syndrome in preterm neonates
Objective: To test the hypothesis that high circulating concen-trations of maternal anti-angiogenic factors are associated with increased risk of respiratory distress syndrome (RDS). Study Design: This is a nested case-control study of nulliparous women who delivered less than 37 weeks of gestation within the Calcium for Preeclampsia Prevention (CPEP) trial. The study included 116 women with preeclampsia or gestational hyperten-sion and 323 normotensive controls. Soluble fms-like tyrosine kinase 1 (sFlt1), placental growth factor (PlGF) and soluble endo-glin (sEng) in maternal serum were measured at 21â32 weeks of gestation. Results: Preterm infants born to hypertensive mothers were more likely to develop RDS (22.5% vs. 20.9%, p =0.03). After adjustment for gestational age at delivery, the odds ratio for the relationship between hypertension in pregnancy and RDS was 2.18 (95% CI 1.08â4.39). In hypertensive pregnancies women whose infants developed RDS had significantly higher circulating mean sFlt1 levels during midpregnancy (21â32 weeks of gestation) even after adjustment for gestational age at delivery (21,516 pg/mL vs. 7,000 pg/mL, p =0.01). Conclusions: Preterm preeclampsia and gestational hypertension, charac-terized by high circulating levels of sFlt1, are associated with a twofold increased risk of RDS in infants delivered before 37 weeks. Among women with these hypertensive pregnancies circulating sFlt1 concentrations during midpregnancy were substantially higher in women whose infants developed RDS
Justice at Sea: Fishersâ politics and marine conservation in coastal Odisha, India
This is a paper about the politics of fishing rights in and around the Gahirmatha marine sanctuary in coastal Odisha, in eastern India. Claims to the resources of this sanctuary are politicised through the creation of a particularly damaging narrative by influential Odiya environmental actors about Bengalis, as illegal immigrants who have hurt the ecosystem through their fishing practices. Anchored within a theoretical framework of justice as recognition, the paper considers the making of a regional Odiya environmentalism that is, potentially, deeply exclusionary. It details how an argument about âillegal Bengalisâ depriving âindigenous Odiyasâ of their legitimate âtraditional fishing rightsâ derives from particular notions of indigeneity and territory. But the paper also shows that such environmentalism is tenuous, and fits uneasily with the everyday social landscape of fishing in coastal Odisha. It concludes that a wider class conflict between small fishers and the state over a sanctuary sets the context in which questions about legitimate resource rights are raised, sometimes with important effects, like when out at sea
Insurgent regeneration: Spatial practices of citizenship in the rehabilitation of inner city SĂŁo Paulo
The city centre of SĂŁo Paulo has increasingly become a key site for local housing movements to challenge the rules and
practices of differentiated citizenship in urban Brazil. This is in line with Sassenâs analysis arguing that the last two
decades have seen an increasingly urban articulation of global struggles, and a growing use of urban space to make
political claims. Organised vacant buildings and occupations led by social movements in the centre of SĂŁo Paulo are
prominent examples of urban spaces being appropriated to advance the claims of otherwise marginalised urban
subjects. In the face of rising inequalities and social and spatial divisions across the city, squatted buildings emerge as a
space of negotiation with political consequences at various times and scales. Apart from acquiring a symbolic value in
the debate over regeneration and gentrification processes in the inner city area of SĂŁo Paulo, vacant building
occupations are simultaneously intended by their proponents as a means to provide shelter to those in need;
experiment alternative ways of producing low-income housing in well-located urban areas; and contribute to wider
demands for urban reform across Brazil. This article explores in detail the spatial practices of individuals and groups
occupying a building known as Ocupação Marconi. It focuses on the production of the building being seen as a device
for advancing alternative formulations of citizenship, and discusses the implication of this interpretation for a renewed
definition of the notion and practice of urban regeneratio
From absent to present pasts: civil society, democracy and the shifting place of memory in Brazil
This paper takes Alexis de Tocquevilleâs concern with the emotional life of citizens as a cue for exploring the role of collective memory within âthe self-organizing sphereâ and asking how the invocation of memory affects progress towards democracy. The paper hones in on the Brazilian experience, re-assessing Brazilâs amnesiac past as well as its much lauded âturn to memoryâ. Against common assertions that Brazilâs âturn to memoryâ will enhance the countryâs democratic credentials, this paper argues that the move from an âabsentâ to a âpresentâ past in Brazil in fact bodes rather mixed prospects for the countryâs democratic deepening
Rhythms of walking : history and presence in a city street
Peer reviewedPostprin
On handling urban informality in southern Africa
In this article I reconsider the handling of urban informality by urban planning and management systems in southern Africa. I argue that authorities have a fetish about formality and that this is fuelled by an obsession with urban modernity. I stress that the desired city, largely inspired by Western notions of modernity, has not been and cannot be realized. Using illustrative cases of topâdown interventions, I highlight and interrogate three strategies that authorities have deployed to handle informality in an effort to create or defend the modern city. I suggest that the fetish is built upon a desire for an urban modernity based on a concept of formal order that the authorities believe cannot coexist with the âdisorderâ and spatial âunrulinessâ of informality. I question the authorities' conviction that informality is an abomination that needs to be âconvertedâ, dislocated or annihilated. I conclude that the very configuration of urban governance and socio-economic systems in the region, like the rest of sub-Saharan Africa, renders informality inevitable and its eradication impossible
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