Activated Carbon Pore Expansion using Acidic Hydrothermal Method

Petroleum Coke is a widely abundant, high carbon content material produced as a byproduct of the oil refining process. Its abundance makes the price per ton low and it is produced in almost all regions of the world. Due to the low price and high carbon percentage, commercial companies make large amounts of activated carbon using petroleum coke as a precursor. These activated carbons are characterized by their high surface area and can achieve widely varying pore morphology with different activation processes. The goal of this work is to achieve a homologous mesopore activated carbon material for use in super capacitor and catalysis applications using commercial activated carbon. Using a mixture of nitric acid and sulfuric acid, the mostly microporous (pores of diameter less than 2nm) petroleum coke derived activated carbon are etched away to make meso-pores (diameter between 2nm and 50nm)

Teaching Music Theory and History with Collaborative Awareness

The disciplines of music history and music theory are integrally linked: One cannot be studied without the other. Courses in these disciplines are at the core of many undergraduate music degree programs, and upon completing a graduate degree in music at Andrews University, students are expected to demonstrate the ability to synthesize their knowledge in both disciplines. The path towards successfully teaching these skills of synthesis involves awareness and collaboration between teachers in both disciplines, and it involves active inclusion of students’ own choices and goals in the music they study

Taxation in South Dakota: A Preliminary Report

The demands for tax-supported services in South Dakota are ever increasing while the tax receipts to finance such services are not increasing accordingly. The upward trend in the cost of education highway and public welfare programs are primo examples of the additional revenue requirements. Methods of financing these programs and the effect of financial policies on those paying the tax bills will be the subject of this report. Voters and state legislators need to know the effects of alternative programs for collecting and spending state revenues. In this report an attempt will be made to point out the major services that are received from taxation as well as how much these services are costing. Major emphasis will be placed on taxes pi\id by South Dakota citizens, with particular consideration given to the affects of various tax policies on the farmers. In the operation of the economic system in this country a very large percentage of the decisions made by individuals, either to buy or to sell goods or services, is left to the discretion of those buying and selling. If buyers feel that the price of a desired item is too high, they either attempt to get along without it or possibly buy a cheaper substitute# Such decision making is and has been an important factor in raising the level of living in this country. An exception to this important aspect of economic activity can be found in the field of taxation. How often do people evaluate the services they are receiving when making tax payments? Do they consider whether good tax purchase is being made cr do they feel that the product or service offered for sale is overpriced? To have a system of taxation that is thought by all taxpayers to be ono that distributes the burden of payments fairly, is an ideal probably never attainable. However a constant effort should be made to reach that goal. By so doing the inequalities that do exist can be minimized

Omniscopes: Large Area Telescope Arrays with only N log N Computational Cost

We show that the class of antenna layouts for telescope arrays allowing cheap analysis hardware (with correlator cost scaling as N log N rather than N^2 with the number of antennas N) is encouragingly large, including not only previously discussed rectangular grids but also arbitrary hierarchies of such grids, with arbitrary rotations and shears at each level. We show that all correlations for such a 2D array with an n-level hierarchy can be efficiently computed via a Fast Fourier Transform in not 2 but 2n dimensions. This can allow major correlator cost reductions for science applications requiring exquisite sensitivity at widely separated angular scales, for example 21cm tomography (where short baselines are needed to probe the cosmological signal and long baselines are needed for point source removal), helping enable future 21cm experiments with thousands or millions of cheap dipole-like antennas. Such hierarchical grids combine the angular resolution advantage of traditional array layouts with the cost advantage of a rectangular Fast Fourier Transform Telescope. We also describe an algorithm for how a subclass of hierarchical arrays can efficiently use rotation synthesis to produce global sky maps with minimal noise and a well-characterized synthesized beam.Comment: Replaced to match accepted PRD version. 10 pages, 9 fig

Global Journalist: Did Facebook's "pivoted to video" cause publishers to face plant?

On this December 11, 2020 Global Journalist program, journalists discuss the media industry's "pivot to video." The trend was led by Facebook and lasted from 2015 to 2018. The journalists discuss the casualties of the failed trend and what lessons can be learned