Six Two-Part Songs

Analysis of the copulatory courtship songs of Lutzomyia longipalpis in six populations from Brazil.

The sand fly Lutzomyia longipalpis Lutz & Neiva (Diptera: Psychodidae: Phlebotominae), the main vector of Leishmania infantum in the Americas, is believed to be a species complex, although the status of different Brazilian populations is still somewhat unclear. Preliminary analysis of the acoustic signals that are produced during copulation by L. longipalpis males has suggested the existence of...

Part Two

Part II of The Impact of AIDS provides summaries of selected studies referred to in earlier chapters. For each study, the summary gives a brief overview of the objectives and results of the research. Much of the usefulness of the results depends on how a study was carried out. The summaries give information about the methodology , the size of the sample and whether it was representative, whethe...

Classifying Parts Of Songs

Audio visualizers are programs that take in music and produce images that correspond to the music in some pleasing way. In most songs there are several different parts: the verse, chorus, a solo, and so on. Ideally, a music visualizer would change its output to match the different parts of the song. While it is quite easy for humans to detect the difference between different parts of songs the ...

PART TWO Clinical Experiences

Two-Part Set Systems

The two part Sperner theorem of Katona and Kleitman states that if X is an n-element set with partition X1 ∪X2, and F is a family of subsets of X such that no two sets A,B ∈ F satisfy A ⊂ B (or B ⊂ A) and A ∩ Xi = B ∩ Xi for some i, then |F| ≤ ( n ⌊n/2⌋ ) . We consider variations of this problem by replacing the Sperner property with the intersection property and considering families that satis...