Camilo A. Contreras

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Digastric muscle is characterized by presenting occasional variations. The suprahyoid region of an 83 year-old male cadaver was dissected and an anatomic variation of the digastric muscle was observed in its anterior belly. It consisted of an accessory bilateral anterior belly originating in the intermediate tendon and inserted into the mylohyoid raphe. The(More)
This paper reports on the results of a large infrastructure investment experiment in which $68 million in spending was randomly allocated across a set of low-income urban neighborhoods in Mexico. We show that the program resulted in substantial improvements in access to infrastructure and increases in private investment in housing. While a pre-committed(More)
This paper reports on the results of a large infrastructure investment experiment in which $68 million in spending was randomly allocated across a set of low-income urban neighborhoods in Mexico. We show that the program resulted in meaningful improvements in the access of the average household to numerous forms of infrastructure, such as electric lighting,(More)
Here we find the complete family of two degree of freedom classical Hamiltonians with invariant plane Γ = {q2 = p2 = 0} whose normal variational equation around integral curves in Γ is a generically a Hill-Schrödinger equation with cuartic polynomial potential. In particular, these Hamiltonian form a family of non-integrable Hamiltonians through rational(More)
Streptomyces olindensis DAUFPE 5622, which was isolated from a Brazilian soil sample, produces the antitumor anthracycline cosmomycin D. The genome sequence is 9.4 Mb in length, with a G+C content of 71%. Thirty-four putative secondary metabolite biosynthetic gene clusters were identified, including the cosmomycin D cluster.
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