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The application of the Diels-Alder reaction to polymer syntheses based on furan/maleimide reversible couplings
Gandini, Alessandro;
Polímeros , 2005, DOI: 10.1590/S0104-14282005000200007
Abstract: the furan heterocycle is a dienic reagent particularly suitable for the diels-alder reaction and maleimides represent a typical family of complementary reagents because of their strong dienophilic character. this paper reviews critically the studies devoted to the exploitation of the diels alder reaction between those moieties to synthesise macromolecular materials possessing different structures and properties. the most relevant approaches in this field are (i) polycondensation reactions calling upon a-a and b-b monomers and (ii) reversible cross-linking of linear polymers bearing pendant furan or maleimide moieties, based on the temperature sensitivity of the diels-alder equilibrium.
La exclusión laboral juvenil en Argentina. Propuesta de una tipología para su análisis
Luciana Gandini
Papeles de población , 2004,
Abstract: La idea central del artículo es que los jóvenes mantienen vínculos diferenciados con el mercado de trabajo y éstos pueden ser analizados en función del grado de inclusión exclusión laboral. Tales vínculos pueden dar lugar a la conformación de grupos con perfiles sociodemográficos y laborales propios. Se propone caracterizar a aquellas inclusiones no plenas a partir de ciertos indicadores de las ocupaciones que han sido objeto de ajuste como consecuencia del proceso de flexibilización laboral de los últimos a os. El trabajo utiliza una propuesta de operacionalización del concepto de exclusión social enfocado al mercado de trabajo, a partir de una tipología analítica de inclusión exclusión laboral
Spherical orbit closures in simple projective spaces and their normalizations
Jacopo Gandini
Mathematics , 2009,
Abstract: Let G be a simply connected semisimple algebraic group over an algebraically closed field k of characteristic 0 and let V be a rational simple G-module of finite dimension. If G/H \subset P(V) is a spherical orbit and if X is its closure, then we describe the orbits of X and those of its normalization. If moreover the wonderful completion of G/H is strict, then we give necessary and sufficient combinatorial conditions so that the normalization morphism is a homeomorphism. Such conditions are trivially fulfilled if G is simply laced or if H is a symmetric subgroup.
Simple linear compactifications of odd orthogonal groups
Jacopo Gandini
Mathematics , 2011,
Abstract: We classify the simple linear compactifications of SO(2r+1), namely those compactifications with a unique closed orbit which are obtained by taking the closure of the SO(2r+1)xSO(2r+1)-orbit of the identity in a projective space P(End(V)), where V is a finite dimensional rational SO(2r+1)-module.
Finiteness Properties of Non-Uniform Lattices on CAT(0) Polyhedral Complexes
Giovanni Gandini
Mathematics , 2011,
Abstract: We show that the homological finiteness length of a non-uniform lattice on a locally finite CAT(0) n-dimensional polyhedral complex is less than n. As a corollary, we obtain an upper bound for the homological finiteness length of arithmetic groups over function fields. This gives an easier proof of a result of Bux and Wortman that solved a long-standing conjecture.
Cohomological invariants and the classifying space for proper actions
Giovanni Gandini
Mathematics , 2011,
Abstract: We investigate two open questions in a cohomology theory relative to the family of finite subgroups. The problem of whether the F-cohomological dimension is subadditive is reduced to extensions by groups of prime order. We show that every finitely generated regular branch group has infinite rational cohomological dimension. Moreover, we prove that the first Grigorchuk group G is not contained in Kropholler's class HF .
Bounding the homological finiteness length
Giovanni Gandini
Mathematics , 2011, DOI: 10.1112/blms/bds047
Abstract: We give a criterion for bounding the homological finiteness length of certain HF-groups. This is used in two distinct contexts. Firstly, the homological finiteness length of a non-uniform lattice on a locally finite n-dimensional contractible CW-complex is less than n. In dimension two it solves a conjecture of Farb, Hruska and Thomas. As another corollary, we obtain an upper bound for the homological finiteness length of arithmetic groups over function fields. This gives an easier proof of a result of Bux and Wortman that solved a long-standing conjecture. Secondly, the criterion is applied to integer polynomial points of simple groups over number fields, obtaining bounds established in earlier works of Bux, Mohammadi and Wortman, as well as new bounds. Moreover, this verifes a conjecture of Mohammadi and Wortman.
Luiz Gonzaga Gandini Jr.
Luiz Gonzaga Gandini Jr.
Revista Dental Press de Ortodontia e Ortopedia Facial , 2007, DOI: 10.1590/s1415-54192007000200007
Abstract:
O protagonismo do indivíduo na sociedade hipermoderna The individual protagonism in the hypermodern society
Carla Gandini Giani Martelli
Estudos de Sociologia , 2011,
Abstract: Este trabalho pretende discorrer sobre os vários signifi cados que o termo individualismo pode assumir na sociedade hipermoderna. Isso será feito a partir da elabora o de uma tipologia dos indivíduos: indivíduo pouco indivíduo; indivíduo muito indivíduo e indivíduo narcísico altruísta, mostrando que o último tipo é o que melhor expressa a sociedade de hoje: uma sociedade paradoxal na qual coabitam sentidos contrários. E é exatamente em fun o das contradi es e paradoxos que se pode acenar com otimismo para as possibilidades do indivíduo: ele pode ser, a um só tempo, obcecado por si mesmo e sensível ao outro. Palavras-chave: Individualismo. Hipermodernidade. Narcisismo. Altruísmo. Consumismo. This article aims at discussing the variety of meanings that the term individualism may assume in the hypermodern society. The article addresses it by the creation of a typology of individuals: “less individual”, “very much” and “narcissistic-altruistic”. The last one best fi ts to describe our society: a paradoxical society in where contradictory meanings live side-by-side. In fact, contradictions and paradoxes are the reason for optimism: individuals can be at the same time extremely in love for themselves and sensitive to others. Keywords: Individualism. Hypermodernity. Narcissism. Altruis. Consumerism.
Globalized world: the private and the universal Mundo globalizado: entre o particular e o universal
Carla Gandini Giani Martelli
Estudos de Sociologia , 2007,
Abstract: Among reflections incited by globalization, this article intends to bring to discussion the impasse that has been reached on the subject between those who struggle to validate universal truths and those who deny the possibility of universalisms on defense of a relativist, particularistic and located view. The “politics of the subject”, supported by the strength of communication, solidarity and democracy, is being pointed to be a possible way to face that impasse. Keywords: Globalization. Modernity. Post-modernity. Universalism. Relativism. Politics of the subject. Democracy. Em meio a reflex es incitadas pelos processos de globaliza o, este artigo pretende trazer à discuss o o embate que se trava entre aqueles que lutam para validar verdades universais e os que negam a possibilidade de universalismos em defesa de uma vis o relativista, particularista e localizada. A “política do sujeito”, amparada pelo fortalecimento da comunica o, da solidariedade e da democracia, é apontada como um caminho possível para enfrentar tal embate. Palavras-chave: Globaliza o. Modernidade. Pós-modernidade. Universalismo. Relativismo. Política do sujeito. Democracia.
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