467 resultados para Tripartite Altruism


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Paged continuously.

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Introduction.--Manners.--Gifts.--Defects of giving.--Mutuality.--Love.--Justice.--Conclusion.

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Let K(r, s, t) denote the complete tripartite graph with partite sets of size r, s and t, where r less than or equal to s less than or equal to t. Let D be the graph consisting of a triangle with an edge attached. We show that K(r, s, t) may be decomposed into copies of D if and only if 4 divides rs + st + rt and t less than or equal to 3rs/(r + s).

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We show that an optical parametric oscillator based on three concurrent chi((2)) nonlinearities can produce, above threshold, bright output beams of macroscopic intensities which exhibit strong tripartite continuous-variable entanglement. We also show that there are two ways that the system can exhibit a three-mode form of the Einstein-Podolsky-Rosen paradox, and calculate the extracavity fluctuation spectra that may be measured to verify our predictions.

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We compare theoretically the tripartite entanglement available from the use of three concurrent x(2) nonlinearities and three independent squeezed states mixed on beamsplitters, using an appropriate version of the van Loock-Furusawa inequalities. We also define three-mode generalizations of the Einstein-Podolsky-Rosen paradox which are an alternative for demonstrating the inseparability of the density matrix.

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In this work, we analyse and compare the continuous variable tripartite entanglement available from the use of two concurrent or cascaded X (2) nonlinearities. We examine both idealized travelling-wave models and more experimentally realistic intracavity models, showing that tripartite entangled outputs are readily producible. These may be a useful resource for applications such as quantum cryptography and teleportation.

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Motherhood and Priesthood are two roles that carry with them particular expectations and demands; both are premised on the notion of altruism and sacrifice, constant availability, and putting the needs of others before one’s own (Carroll et al. 1983; Hayes 1996; Peyton and Gatrell 2013; Thorne 2000). This has also been gendered; sacrifice and altruism have traditionally been connected with women (Hays 1996). This article will examine what happens when clergy mothers simultaneously enact the roles of priesthood and motherhood, and how this is managed in the context of ‘intensive’ motherhood and priesthood. Based on in-depth semi-structured interviews with 17 clergy mothers in the Anglican Church, it will highlight the contradictions, negotiations and interweaving which occurs for both roles to be concurrently enacted, offering a contextual insight into the management of motherhood vis-à-vis professional life.