Perspectives on partnership: Highlights of a literature review

Working in partnership has become central in efforts to address complex environmental, socio-economic, and technological problems. The terms partner or partnership appear more than 100 times in the Paris Declaration on Aid Effectiveness and more than 200 times in the version of the CGIAR's new Strategy and Results Framework presented at the recent Global Conference on Agricultural Research for Development. It is promoted as an effective means to mobilise the resources and capacities needed to generate knowledge, stimulate innovation and influence decision-making. Nevertheless, partnering is often experienced as timeconsuming and frustrating, and it has proved difficult to demonstrate its 'value added'. To improve partnering at the International Potato Center (CIP), we reviewed publications, evaluations and reports dealing with partnership. Rather than a single 'partnership literature' we found several different literatures that approach the subject from different perspectives. Several themes – relating to partnering processes vs. partnership structures, partnership dynamics, types of partnership, incentives for partnering, the key role of trust, power and equity issues, success factors and evaluation – cut across the distinct literatures. This ILAC Brief presents findings in each of these areas, notes some prominent knowledge gaps and identifies areas for future study

Analogue Cosmological Particle Creation: Quantum Correlations in Expanding Bose Einstein Condensates

We investigate the structure of quantum correlations in an expanding Bose Einstein Condensate (BEC) through the analogue gravity framework. We consider both a 3+1 isotropically expanding BEC as well as the experimentally relevant case of an elongated, effectively 1+1 dimensional, expanding condensate. In this case we include the effects of inhomogeneities in the condensate, a feature rarely included in the analogue gravity literature. In both cases we link the BEC expansion to a simple model for an expanding spacetime and then study the correlation structure numerically and analytically (in suitable approximations). We also discuss the expected strength of such correlation patterns and experimentally feasible BEC systems in which these effects might be detected in the near future.Comment: Reference adde

Spontaneous photon production in time-dependent epsilon-near-zero materials

Quantum field theory predicts that a spatially homogeneous but temporally varying medium will excite photon pairs out of the vacuum state. However, this important theoretical prediction lacks experimental verification due to the difficulty in attaining the required nonadiabatic and large amplitude changes in the medium. Recent work has shown that in epsilon-near-zero (ENZ) materials it is possible to optically induce changes of the refractive index of the order of unity, in femtosecond time scales. By studying the quantum field theory of a spatially homogeneous, time-varying ENZ medium, we theoretically predict photon-pair production that is up to several orders of magnitude larger than in non-ENZ time-varying materials. We also find that while in standard materials the emission spectrum depends on the time scale of the perturbation, in ENZ materials the emission is always peaked at the ENZ wavelength. These studies pave the way to technologically feasible observation of photon-pair emission from a time-varying background with implications for quantum field theories beyond condensed matter systems and with potential applications as a new source of entangled light

Curtis\u27s botanical magazine.

v.136=ser.4:v.6 (1910) [no.8292-8351

Curtis\u27s botanical magazine.

v.142=ser.4:v.12 (1916) [no.8642-8691

Curtis\u27s botanical magazine.

v.145=ser.4:v.15 (1919) [no.8786-8829

Curtis\u27s botanical magazine.

v.130=ser.3:v.60 (1904) [no.7932-7991

Curtis\u27s botanical magazine.

v.82=ser.3:v.12 (1856) [no.4891-4957

Curtis\u27s botanical magazine.

v.100=ser.3:v.30 (1874) [no.6074-6139