The hypothesis that neutrinos are massive has a strong experimental support; however, the information we have is quite limited, and many possibilities are open. Theoretical considerations might help fill the gaps (or foresee regularities), as we illustrate with a specific example. Several experiments suggest that the neutrinos oscillate in flavor, as expected if they are massive; the strongest indication is the atmospheric neutrino deficit. However, most of available information can be dubbed as flavor disappearance and this is perhaps the main reason of doubt (the signal of ¯νe appearance seen in the LSND experiment will be tested soon). More specific statements rely on details of the data or analyses, and have a less compelling significance at present a. The safest approach would be to wait for more data. If instead one tries to interpret all the indications by oscillations, one has to answer the Sphinx question: Are three neutrinos enough? If the negative opinion is expressed, one has to confront with sterile neutrinos, 6 possible arrangements of the mass levels, not to speak of the number of mixings and phases. Suspending the judgement on LSND

Three lines of evidence indicate that in the most common type of core collapse supernovae, the energy deposited in the ejecta by the exploding core is approximately proportional to the progenitor mass cubed. This results stems from an observed uni-formity of light curve plateau duration, a correlation between mass and ejecta velocity, and the known correlation between luminosity and velocity. This result ties in ana-lytical and numerical models together with observations, providing us with clues as to the mechanism via which the explosion of the core deposits a small fraction of its energy into the hurled envelope. Key words: Supernovae: general 1

Color histograms are used to compare images in many applications. Their advantages are efficiency, and insensitivity to small changes in camera viewpoint. However, color histograms lack spatial information, so images with very di#erent appearances can have similar histograms. For example, a picture

of increased plant growth, attended by greater shrub abundance and northward migration of the tree line. Evidence also suggests that the tundra has changed from a net sink to a net source of atmospheric carbon dioxide. Taken together, these results paint a reasonably coherent picture of change

and logic in the lab: Toward a coherent picture of computation

of quantum nuclear rotation beyond the correspondence principle

About twenty years ago I was in a jogging group and was known in that group for my eagerness to take shortcuts. Our standard route included a stretch on a dirt road that became deep mud when it rained, but we had a longer detour on pavement for those days. One day after a rain, as we approached this stretch, I said,

polychotomous waves from an attractive well

vivo and in vivo topographic studies of bladder by optical

has been approved