A brief review is presented of the stability domain of threeand fourcharge ground-states when the constituent masses vary. Rigorous results are presented, based on the scaling behavior and the convexity properties deduced from the variational principle. They are supplemented by accurate numerical computations. Talk given at the Workshop Critical Stability, Les Houches, Oct. 8–12, 2001, to appea...

The deuteron-proton elastic scattering is studied in the multiple scattering expansion formalism. The contributions of the one-nucleon-exchange, singleand double scattering are taken into account. The Love and Franey parameterization of the nucleon-nucleon t-matrix is used, that gives an opportunity to include the off-energy-shell effects into calculations. Differential cross sections are consi...

The effective field theory with contact interactions alone is a powerful tool to compute low-energy observables for three-body systems with large scattering length. Recent calculations including effective range corrections are discussed and results are presented.

The pionless effective field theory (EFT) is the appropriate low-energy EFT for short-range interactions that display a large scattering length. It has been successfully applied in atomic, nuclear and particle physics. We give an overview over recent calculations employing the pionless effective field theory and lay emphasis on applications in the threeand four-body sector where the most exciti...

We report on the rst reliable numerical results for proton-deuteron elastic scattering observables for energies above the deuteron breakup threshold , for the Paris potential. The calculations have been performed within the screening and renormalisation approach. The theoretical results are compared with experimental data of Sagara et al.

The two major conservation issues for drylands of Africa are habitat loss or degradation and habitat fragmentation, largely from agriculture, charcoal production, and infrastructural development. A key question for management is how these landscapes can retain their critical ecological functions and services, while simultaneously supporting resilient livelihoods. It is a clear nexus question in...

The water–energy–food nexus is being promoted as a conceptual tool for achieving sustainable development. Frameworks for implementing nexus thinking, however, have failed to explicitly or adequately incorporate sustainable livelihoods perspectives. This is counterintuitive given that livelihoods are key to achieving sustainable development. In this paper we present a critical review of nexus ap...

Data Science is a developing computational field in Central America and Mexico. The high availability of data related to energy and economy through several international agencies provides an excellent opportunity to plan and execute research projects and test tools and techniques. Also, energy is an important subject of research from different perspectives: economic, social, human development, ...

Nanomedicine rests at the nexus of medicine, bioengineering, and biology with great potential for improving health through innovation and development of new drugs and devices. Carbon nanotubes are an example of a fibrillar nanomaterial poised to translate into medical practice. The leading candidate material in this class is ammonium-functionalized carbon nanotubes (fCNT) that exhibits unexpect...

This study was conducted in Delta State Nigeria to establish a nexus between rural-urban migration and child labour. Random sampling was applied to select rural settlements and this study covers 450 sample farming households. The results show that rural-urban migration influence child labour (P