Combining absolute and relative information in studies on food quality

A common problem in food science concerns the assessment of the quality of food samples. Typically, a group of panellists is trained exhaustively on how to identify different quality indicators in order to provide absolute information, in the form of scores, for each given food sample. Unfortunately, this training is expensive and time-consuming. For this very reason, it is quite common to search for additional information provided by untrained panellists. However, untrained panellists usually provide relative information, in the form of rankings, for the food samples. In this paper, we discuss how both scores and rankings can be combined in order to improve the quality of the assessment

Microwave Power Combiner/Switch Utilizing a Faraday Rotator

A proposed device for combining or switching electromagnetic beams would have three ports, would not contain any moving parts, and would be switchable among three operating states: Two of the ports would be for input; the remaining port would be for output. In one operating state, the signals at both input ports would be coupled through to the output port. In each of the other two operating states, the signal at only one input port would be coupled to the output port. The input port would be selected through choice of the operating state

Evaluating the cost of poverty alleviation transfer programs: An Illustration Based on PROGRESA in Mexico

"One of the common criticisms of poverty alleviation programs is that the high share of administrative (nontransfer) costs substantially reduces the programs' impact on poverty. But very little empirical evidence exists on program costs. For example, a recent extensive international review of targeted poverty alleviation programs in developing countries could find data on costs for only 32 out of the 111 programs reviewed. Even then, the numbers available were not always comparable. In this paper, we present a detailed analysis of the cost structure of a program recently introduced in Mexico, called PROGRESA. Our analysis shows how cost data can be used as the basis for an evaluation of the cost efficiency of anti-poverty programs. It cautions, however, that one must be very careful when interpreting cost numbers or undertaking comparisons across programs in order to avoid misleading conclusions. Any credible analysis of a program's cost efficiency must involve a detailed analysis of cost structure and not simply provide aggregate cost information. We also highlight the importance of not neglecting private costs incurred by households in taking up transfers." Authors' AbstractPoverty Research Methodology ,Poverty alleviation Mexico ,Transfer payments ,Education Economic aspects ,Human capital ,Cost efficiency ,