Ion mass spectrometer for special uses

Prototype of curved-electrode, Paul-type, quadrupole, electrodynamic mass filter has the mass-resolution and transmission-factor properties expected from both theoretical considerations and results of experiments using linear quadrupole features

Development of an engineering prototype ion mass spectrometer for the mass analysis of the lunar atmosphere Final report

Engineering prototype ion mass spectrometer for mass analysis of lunar atmospher

Compelled to do the right thing

We use a model of opinion formation to study the consequences of some mechanisms attempting to enforce the right behaviour in a society. We start from a model where the possible choices are not equivalent (such is the case when the agents decide to comply or not with a law) and where an imitation mechanism allow the agents to change their behaviour based on the influence of a group of partners. In addition, we consider the existence of two social constraints: a) an external authority, called monitor, that imposes the correct behaviour with infinite persuasion and b) an educated group of agents that act upon their fellows but never change their own opinion, i.e., they exhibit infinite adamancy. We determine the minimum number of monitors to induce an effective change in the behaviour of the social group, and the size of the educated group that produces the same effect. Also, we compare the results for the cases of random social interactions and agents placed on a network. We have verified that a small number of monitors are enough to change the behaviour of the society. This also happens with a relatively small educated group in the case of random interactions.Comment: 8 pages, 9 figures, submitted to EPJ

MEASUREMENTS OF LIQUID DAMPING PROVIDED BY RING BAFFLES IN CYLINDRICAL TANKS

Damping effect of flat ring baffles on liquid sloshing in partially filled cylindrical tank

David Wojnarowicz and the Surge of Nuances

ABSTRACT   When looking at two paintings, ostensibly by Rembrandt, is there an aesthetic difference in how these paintings are perceived if we know that one of the two paintings is a forgery? Most certainly, declared Nelson Goodman (1976). Knowledge of the difference would modify the aesthetic experience. When looking at Michelangelo’s Christ on the Cross, the result is arguably similar. What we see depends on what we know about Christ’s story. The same might also be said more generally about tragic narratives and their accompanying indicia. Awareness impacts viewers acutely. This is especially evident in curated Holocaust memorials, where the ghastly artifacts, and the unfathomable story lines, are intrinsic to their aesthetic force. This insight however is by no means limited to curated monuments. Learning that an artist, David Wojnarowicz for example, was a victim of inconceivable torment is no less critical to how their artworks are perceived. Our argument, in its totality, is that being informed is preferable to unknowing, and that knowing, however manifested, has the capacity of modifying visual perception. &nbsp