McCulloch at 200

March 6, 2019 marked the 200th anniversary of the Supreme Court’s issuance of its decision in McCulloch v. Maryland, upholding the constitutionality of the Second Bank of the United States, the successor to Alexander Hamilton’s national bank. McCulloch v. Maryland involved a constitutional challenge by the Second Bank of the United States to a Maryland tax on the banknotes issued by the Bank’s Baltimore branch. The tax was probably designed to raise the Second Bank’s cost of issuing loans and thereby disadvantage it relative to Maryland’s own state-chartered banks. Marshall’s opinion famously rejected the Jeffersonian strict-constructionist argument that implied powers are limited to those legislative means that are indispensably necessary to the viability of the enumerated power. Instead, Marshall concluded, Congress must have discretion to choose among any means convenient or well-adapted to implementing the government’s granted powers. After concluding that Congress had the power to create the Second Bank, the McCulloch opinion turned to the question of whether Maryland could tax it. Reasoning that the essence of federal supremacy is to remove all obstacles to federal government action within its sphere, Marshall concluded that states cannot tax operations of the federal government

Development of an optimized intumescent coating

Intumescent coatings for small diameter air launched missiles were studied. An aerodynamically smooth, moderately flexible coating, with excellent thermal efficiency was developed

A survey of classical Langmuir probe theory with applications to flowing ionized gases Interim report

Classical Langmuir probe theory with applications to flowing ionized gase

Aluminum foil interconnects for solar cell panels

Commercially available sonic welding system and a specially-designed tip bonds aluminum foil interconnects to titanium-silver solar cell contacts

Alfven solitons in the solar wind

A nonlinear Alfven soliton solution of the MHD equations is presented. This solution represents the final state of modulationally unstable Alfven waves. A model of the expected turbulent spectrum due to a collection of such solitons is briefly described

Development of high resolution imaging detectors for x ray astronomy

This final report summarizes our past activities and discusses the work performed over the period of 1 April 1990 through 1 April 1991 on x-ray optics, soft x-ray (0.1 - 10 KeV) imaging detectors, and hard x-ray (10 - 300 KeV) imaging detectors. If microchannel plates (MCPs) can be used to focus x-rays with a high efficiency and good angular resolution, they will revolutionize the field of x-ray optics. An x-ray image of a point source through an array of square MCP pores compared favorably with our ray tracing model for the MCP. Initial analysis of this image demonstrates the feasibility of MCPs for soft x-rays. Our work continues with optimizing the performance of our soft x-ray MCP imaging detectors. This work involves readout technology that should provide improved MCP readout devices (thin film crossed grid, curved, and resistive sheets), defect removal in MCPs, and photocathode optimization. In the area of hard x-ray detector development we have developed two different techniques for producing a CsI photocathode thickness of 10 to 100 microns, such that it is thick enough to absorb the high energy x-rays and still allow the photoelectrons to escape to the top MCP of a modified soft x-ray imaging detector. The methods involve vacuum depositing a thick film of CsI on a strong back, and producing a converter device that takes the place of the photocathode