Simultaneous Supplies of Dirty Energy and Capacity Constrained Clean Energy : Is There a Green Paradox?

Marc Gronwald and Luise Roepke gratefully acknowledge financial support by the German Federal Ministry of Education and Research. The authors are indebted to the editors and two anonymous reviewers for their very helpful comments and guidance.Peer reviewedPublisher PD

Simultaneous Supplies of Dirty and Green Fuels with Capacity Constraints : Is there a Green Paradox?

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A Short Note on Undirected Fitch Graphs

The symmetric version of Fitch's xenology relation coincides with class of complete multipartite graph and thus cannot convey any non-trivial phylogenetic information

Research Notes : United States : Variation in pollen receptivity in artificial crosses of ms1-Urbana line

General characters associated with the soybean male-sterile msl gene have been described in a previous study (Chen et al., 1985). Among the four spontaneous and independent msl source populations (Palmer et al., 1978), the Urbana male-sterile (msl-Urbana) line was reported to have 1) higher female fertility (Boerma and Cooper, 1978), 2) lower percentage of ovule abortion (Kennell and Horner, 1985), and 3) higher percentage of pollen-tube germination in male-sterile anthers (Chen et al., 1986). However, no report has men-tioned whether gynoecia of male-sterile plants would have the same receptivity as those of male-fertile plants, when fertile pollen was applied to the stigma of male-sterile plants

Futuristic Education: Hopeful Realism

As educators we must look ahead if we want our students to survive, adapt, and prosper in the fast-changing world of the twenty first century. Educators must demonstrate a responsibility for the future. The proper attitude to develop is a philosophy of hopeful realism. With hopeful realism a person has a clear appreciation of the issues and risks that lie ahead but also a recognition of the emerging solutions and opportunities. Hopeful realism teaches not for the computer but rather for how one can apply the knowledge and power gained by using that computer. It exemplifies values that will continue to transform us into useful citizens and relates information to wisdom. It is this philosophy, not science or technology, which should be uppermost in any culture or civilization, simply because the questions it can answer are more important for the continuance of human life. It is evident that the more technological capacity we possess, the more we need enduring values, because the more power that exists, the more we need to control its direction