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Synthesis of Melanin Polymerization Modifiers
No full textSynthetic analogs of melanins, the biological pigments, are being explored for numerous applications in materials science. Eumelanin, the black to brown human pigment, is formed through a combination of oxidative polymerization and self-assembly. These modifiers can be used to influence synthetic eumelanin formation and optimize the resulting material for specific applications. Most small molecules tested so far have been commercially available compounds. We are using organic synthesis to generate next-generation modifiers by combining the beneficial features of previously studied modifiers with features of the eumelanin intermediates themselves. The target compounds have features ranging from eumelanin-like oxygenated indole rings to aggregation-promoting positive charges. Each target has an amide bond, and we are exploring some new catalytic amidation reactions in addition to classic reactions used in peptide synthesis. We are testing several potential catalysts including silica gel, tripenylborate, and tetrahydroxydiboron. We are characterizing the reaction products by NMR, GC-MS, and LC-MS. This poster will report on our current efforts toward the synthesis of new modifiers of synthetic eumelanin polymerizations
Review: Ofensiva a los oídos piadosos: obscenidad y censura en la poesía española y novohispana del siglo XVIII
No full textThe Most Dangerous Codec in the World: Finding and Exploiting Vulnerabilities in H.264 Decoders
No full textModern video encoding standards such as H.264 are a marvel of hidden complexity. But with hidden complexity comes hidden security risk. Decoding video in practice means interacting with dedicated hardware accelerators and the proprietary, privileged software components used to drive them. The video decoder ecosystem is obscure, opaque, diverse, highly privileged, largely untested, and highly exposed—a dangerous combination.
We introduce and evaluate H26FORGE, domain-specific infrastructure for analyzing, generating, and manipulating syntactically correct but semantically spec-non-compliant video files. Using H26FORGE, we uncover insecurity in depth across the video decoder ecosystem, including kernel memory corruption bugs in iOS, memory corruption bugs in Firefox and VLC for Windows, and video accelerator and application processor kernel memory bugs in multiple Android devices
Did (Imaginary) \u3ci\u3eCinaedi\u3c/i\u3e have Sex with Women?
No full textThis chapter considers the question of whether or not the Romans imagined cinaedi as a category of individuals defined, in part, by their lack of interest in engaging in sexual activity with women. It argues that although the Romans assumed normal men could be interested in homoerotic as well as heteroerotic encounters, one defining feature of the cinaedus was an exclusive preference for homoerotic sex. It argues further that this assumption operates independently of the use of cinaedus as a reproach for men who are not, in fact, thought to be cinaedi
