The solar neutrino problem, atmospheric neutrino problem and the hot dark matter which seems to be required by galaxy formation can all be most economically described by three very degenerate neutrinos with a common mass of a few eV. Such neutrino masses could also be relevant for the recent data on double beta decay. We provide an existence proof for such a scenario by constructing an explicit...

We investigate the properties of a simple programming language whose main computational engine is structural recursion on sets. We describe a progression of sublanguages in this paradigm that (1) have increasing expressive power, and (2) illustrate robust conceptual restrictions thus exhibiting interesting additional properties. These properties suggest that we consider our sublanguages as cand...

One of the research goals of the field of human computer interaction is to make interacting with a computer as natural as interacting with a person. In pursuit of this goal, this thesis demonstrates a system that understands naturally conveyed explanations of mechanical devices in a way that traditional tools do not support. When using a traditional mechanical CAD program, for example, the desi...

Jim Harter, Animals: J4J9 Copyright.Free lUustralions. olmes Rolston Ill's New York: Dover, 1979 Environmental Ethics1 is a wide-ranging work containing many valuable insights and suggestions. But his account of the human treatment of animals2 is seriously confused. It contains arbitrary distinc­ tions which serve as an apologetic for the status quo in our society. In this paper I explain the p...

China leads the world in afforestation, and is one of the few countries whose forested area is increasing. However, this massive "greening" effort has been less effective than expected; afforestation has sometimes produced unintended environmental, ecological, and socioeconomic consequences, and has failed to achieve the desired ecological benefits. Where afforestation has succeeded, the approa...

Enolethers are a group of reactive compounds also occurring in the nature and displaying different kinds of activities, such as antifungal, antibacterial, nematocidal, cytostatic, cytotoxic, phytotoxic, nematicidal, antipyretic, hypotensive, analgesic, antitussive, depresant, anticancerogenic and antiviral.

Light first generation leptoquarks are being hunted for in HERA and at FNAL and there are various proposals for further searches in future machines. Such leptoquarks are however problematic from a theoretical point of view: Low energy precision measurements imply strong constraints on the couplings of the leptoquarks, and up till now the fulfilment of these constraints seemed extremely unnatura...

Recently, it has been reported that small interfering RNAs can silence mutant alleles of genes while not affecting wild-type alleles. This high specificity should also limit off-target effects when these molecules are used in drug-target validation or as therapeutics. Small RNA technology is both extremely versatile, because virtually any expressed gene can be inhibited, and effective, because ...