Pipe replacement by age only, how misleading could it be?

How the WTO Could Be Improved

AbstractThis paper examines the impasse in the current Doha Development Round negotiations andasks how the rules of the WTO could be changed to facilitate multilateral negotiations andto increase the welfare of the Member countries. It considers possible changes to the methodof negotiation. As examples of rules which are outdated, it considers the rules relating toregional trade agreements and ...

Could Only Fermions Be Elementary?

In standard Poincare and anti de Sitter SO(2,3) invariant theories, antiparticles are related to negative energy solutions of covariant equations while independent positive energy unitary irreducible representations (UIRs) of the symmetry group are used for describing both a particle and its antiparticle. Such an approach cannot be applied in de Sitter SO(1,4) invariant theory. We argue that it...

Organic Farming by Using Different Desert Soiles Could it be an Alternative to Fertilizers?

It is shown that Saharan soil has the potential of producing bioavailable iron when illuminated with visible light and also it contains some essential macronutrient and micronutrient elements. In this study, these properties of the desert soil were tested on the certified wheat cultivars (Triticum aestivum L. var. gonen 98) using Hewitt nutrient solution, illuminated and non-illuminated soil so...

Competitive Supragovernmental Regulation: How Could It Be Democratic?

Radiation exposure to cardiologists: how it could be reduced.

It is well known that occupational doses of radiation in interventional procedures guided by fluoroscopy are the highest doses registered among medical staff using x rays. 2 Interventional cardiologists represent the most important group of medical specialists involved in such practices. Scatter radiation levels in the vicinity of the patient may be quite high under normal working conditions. I...