The isometry degree of a computable copy of ℓp\ell^p

When $p$ is a computable real so that $p \geq 1$, the isometry degree of a computable copy $\mathcal{B}$ of $\ell^p$ is defined to be the least powerful Turing degree that computes a linear isometry of $\ell^p$ onto $\mathcal{B}$. We show that this degree always exists and that when $p \neq 2$ these degrees are precisely the c.e. degrees

Archaeological Evidence for Trade in Harz Roller Canaries

A previously unidentified redware vessel has been determined to be a watering pot for a canary cage. This artifact represents an archaeologically recoverable element of the international trade in songbirds, with the birds shipped from Germany to the United States and elsewhere around the world

Review of \u3ci\u3eEvery Twelve Seconds: Industrialized Slaughter and the Politics of Sight. \u3c/i\u3eBy Timothy Pachirat.

In June 2004, political scientist Timothy Pachirat went to work on the killfloor of an unnamed beef slaughterhouse in Omaha, Nebraska. He started out as a liver hanger in the cooler. There carcasses hang before being sent to the fabrication floor where hundreds of handheld knives and saws reinvent chilled half-carcasses as steaks, rounds, and roasts that are then boxed and shipped to distributors and retailers around the world. For four days he worked in the chutes, driving cattle to the knocking box to be stunned, as required by the Humane Slaughter Act, before being turned into meat. Then for three months he was in QC (quality control), which afforded him access to the entire kill floor. In December, when asked by a USDA inspector to blow the whistle on food safety violations, he explained that he was actually an undercover ethnographer. The next day Pachirat quit his job, but stayed in Omaha for another 18 months conducting, on a much less grueling schedule, participant-observation research and interviews with community and union organizers, slaughterhouse workers, USDA inspectors, cattle ranchers, and small-slaughterhouse operators. Sadly, this later research does not appear in his account

Speedy Trial Rights For Florida\u27s Juveniles: A Surveyof Recent Interpretations by Florida Courts

Delay of justice is injustice. This maxim is embodied in the Bill of Rights and in Florida\u27s Constitution: it is implemented by the federal government\u27s Speedy Trial Act of 1974 and by Florida\u27s Rules of Criminal and Juvenile Procedure

Review of \u3ci\u3eEvery Twelve Seconds: Industrialized Slaughter and the Politics of Sight. \u3c/i\u3eBy Timothy Pachirat.

In June 2004, political scientist Timothy Pachirat went to work on the killfloor of an unnamed beef slaughterhouse in Omaha, Nebraska. He started out as a liver hanger in the cooler. There carcasses hang before being sent to the fabrication floor where hundreds of handheld knives and saws reinvent chilled half-carcasses as steaks, rounds, and roasts that are then boxed and shipped to distributors and retailers around the world. For four days he worked in the chutes, driving cattle to the knocking box to be stunned, as required by the Humane Slaughter Act, before being turned into meat. Then for three months he was in QC (quality control), which afforded him access to the entire kill floor. In December, when asked by a USDA inspector to blow the whistle on food safety violations, he explained that he was actually an undercover ethnographer. The next day Pachirat quit his job, but stayed in Omaha for another 18 months conducting, on a much less grueling schedule, participant-observation research and interviews with community and union organizers, slaughterhouse workers, USDA inspectors, cattle ranchers, and small-slaughterhouse operators. Sadly, this later research does not appear in his account

Optimal Oracles for Point-To-Set Principles

The point-to-set principle characterizes the Hausdorff dimension of a subset $E\subseteq\R^n$ by the effective dimension of its individual points. This characterization has been used to prove several results in classical, i.e., without any computability requirements, analysis. Recent work has shown that algorithmic techniques can be fruitfully applied to Marstrand's projection theorem, a fundamental result in fractal geometry. In this paper, we introduce an extension of point-to-set principle - the notion of optimal oracles for subsets $E\subseteq\R^n$. One of the primary motivations of this definition is that, if $E$ has optimal oracles, then the conclusion of Marstrand's projection theorem holds for $E$. We show that every analytic set has optimal oracles. We also prove that if the Hausdorff and packing dimensions of $E$ agree, then $E$ has optimal oracles. Thus, the existence of optimal oracles subsume the currently known sufficient conditions for Marstrand's theorem to hold. Under certain assumptions, every set has optimal oracles. However, assuming the axiom of choice and the continuum hypothesis, we construct sets which do not have optimal oracles. This construction naturally leads to a new, algorithmic, proof of Davies theorem on projections

Cows, Pigs, Corporations, and Anthropologists

Don Stull is professor emeritus of anthropology at the University of Kansas, where he taught from 1975 to 2015. He has been editor-in-chief of Human Organization, president of the Society for Applied Anthropology, and a recipient of the SfAA’s Sol Tax Distinguished Service Award. In 2001 he was presented with the key to Garden City, Kansas, and made an honorary citizen in recognition of the value of his work to this community

First-principles investigation of Ag-Cu alloy surfaces in an oxidizing environment

In this paper we investigate by means of first-principles density functional theory calculations the (111) surface of the Ag-Cu alloy under varying conditions of pressure of the surrounding oxygen atmosphere and temperature. This alloy has been recently proposed as a catalyst with improved selectivity for ethylene epoxidation with respect to pure silver, the catalyst commonly used in industrial applications. Here we show that the presence of oxygen leads to copper segregation to the surface. Considering the surface free energy as a function of the surface composition, we construct the convex hull to investigate the stability of various surface structures. By including the dependence of the free surface energy on the oxygen chemical potential, we are able compute the phase diagram of the alloy as a function of temperature, pressure and surface composition. We find that, at temperature and pressure typically used in ethylene epoxidation, a number of structures can be present on the surface of the alloy, including clean Ag(111), thin layers of copper oxide and thick oxide-like structures. These results are consistent with, and help explain, recent experimental results.Comment: 10 pages, 6 figure