Developing Mathematics Enrichment Workshops for Middle School Students: Philosophy and Sample Workshops

This paper describes our approach to organizing enrichment activities using advanced mathematics topics for diverse audiences of middle school students. We discuss our philosophy and approaches for the structure of these workshops, and then provide sample schedules and resource materials. The workshops cover activities on the following topics: Graphing Calculators; The Chaos Game; Statistical Sampling; CT Scans–the reconstruction problem; The Platonic and Archimedean solids; The Shape of Space; Symmetry; The Binary Number System and the game of NIM; Graph Theory: Proof by Counterexample

The Attack-and-Defense Group Contests: Best-shot versus Weakest-link

This study analyzes a group contest in which one group (defenders) follows a weakest-link whereas the other group (attackers) follows a best-shot impact function. We fully characterize the Nash and coalition-proof equilibria and show that with symmetric valuation the coalition-proof equilibrium is unique up to the permutation of the identity of the active player in the attacker group. With asymmetric valuation it is always an equilibrium for one of the highest valuation players to be active; it may also be the case that the highest valuation players in the attacker group free-ride completely on a group-member with a lower valuation. However, in any equilibrium, only one player in the attacker group is active, whereas all the players in the defender group are active and exert the same effort. We also characterize the Nash and coalition-proof equilibria for the case in which one group follows either a best-shot or a weakest-link but the other group follows an additive impact function

The DOE/NASA wind turbine data acquisition system. Part 3: Unattended power performance monitor

Software documentation, operational procedures, and diagnostic instructions for development version of an unattended wind turbine performance monitoring system is provided. Designed to be used for off line intelligent data acquisition in conjunction with the central host computer

Colloidal Dynamics on Disordered Substrates

Using Langevin simulations we examine driven colloids interacting with quenched disorder. For weak substrates the colloids form an ordered state and depin elastically. For increasing substrate strength we find a sharp crossover to inhomogeneous depinning and a substantial increase in the depinning force, analogous to the peak effect in superconductors. The velocity versus driving force curve shows criticality at depinning, with a change in scaling exponent occuring at the order to disorder crossover. Upon application of a sudden pulse of driving force, pronounced transients appear in the disordered regime which are due to the formation of long-lived colloidal flow channels.Comment: 4 pages, 4 postscript figure

Durability testing at 5 atmospheres of advanced catalysts and catalyst supports for gas turbine engine combustors

The durability of CATCOM catalysts and catalyst supports was experimentally demonstrated in a combustion environment under simulated gas turbine engine combustor operating conditions. A test of 1000 hours duration was completed with one catalyst using no. 2 diesel fuel and operating at catalytically-supported thermal combustion conditions. The performance of the catalyst was determined by monitoring emissions throughout the test, and by examining the physical condition of the catalyst core at the conclusion of the test. Tests were performed periodically to determine changes in catalytic activity of the catalyst core. Detailed parametric studies were also run at the beginning and end of the durability test, using no. 2 fuel oil. Initial and final emissions for the 1000 hours test respectively were: unburned hydrocarbons (C3 vppm):0, 146, carbon monoxide (vppm):30, 2420; nitrogen oxides (vppm):5.7, 5.6

Recent Establishment of the Asian Tiger Mosquito (Aedes albopictus) in Independence County, Arkansas

Three adult Aedes albopictus were collected on 10 August 1993 within the city limits of Batesville, Arkansas. This is the firs tknown report of this species from Independence County. Subsequent investigation revealed the presence of at least three well established populations in the county, two of which were monitored on a monthly basis from Aprilto September of 1994. Peak A. albopictus numbers were recorded in July and August when the population levels were sufficient to make this mosquito a significant pest in Batesville. Our observations suggest that the Asian tiger mosquito will likely colonize other similar communities in Arkansas

RESEARCH PROGRESS IN MIS: THE CENTER FOR RESEARCH ON INFORMATION SYSTEMS NEW YORK UNIVERSITY

Information Systems Working Papers Serie

A Call for a Unified Business Organization Law

The authors propose a wholesale reformation of business organization law. The current regime of business organization law reflects an attempt to blend the benefits of limited liability with conduit or flow-through taxation. The result has been a haphazard development of business forms, often created to satisfy shifting federal tax law guidelines. The authors trace this development, from the traditional corporation and partnership forms through limited partnerships and Subchapter S corporations to the recent organizational forms of limited liability companies and limited liability partnerships. The authors show how the search for the ideal organizational form has failed, leaving an unwieldy morass of choice of entity issues for the business owner. The authors propose a two-tier framework to overhaul existing business organization law and classification. Traditional corporations would continue in existence. The remaining myriad of business forms would be replaced by a simplified Standard Business Organization (“SBO”) governed by a Standard Business Code (“SBC”). The hallmarks of the SBO under the SBC would be limited liability for owners, pass-through taxation, free transferability of interests, perpetual existence or continuity of life, and presumed owner management. These attributes conform to the default features most desired by business owners. Consistent with recent changes by the Treasury Department and the Internal Revenue Service in the traditional entity classification scheme for taxation purposes, the two-tier framework combines the benefits of consistency, flexibility, and simplicity. Current laws and regulations governing business organizations formed as corporations would remain intact, allowing states to continue to “race to the top” (or bottom), and affording a substantial federal entity-level tax base from these entities. The SBC would provide a flexible, owner-oriented operational structure for the SBO while avoiding entity-level taxation, except where the SBO chooses to become publicly traded. The result is a vastly simplified system of business organization law that elevates the substance of desired business organization law elements over the form of attributes necessary to satisfy federal tax guidelines

CC267 Dairy Producer Waste Guidelines

Campaign Circular 267: This circular is about dairy producer waste guidelines

CC267 Dairy Producer Waste Guidelines

Campaign Circular 267: This circular is about dairy producer waste guidelines