Swashplate control system

A mechanical system to control the position of a rotating swashplate is developed. This system provides independent lateral cyclic, longitudinal cyclic and collective pitch control of a helicopter rotor attached to the swashplate, without use of a mixer box. The system also provide direct, linear readout of cyclic and collective swashplate positions

The City-Idea in Argentina: a study in evanescence

Within the current flood of scholarship on cities flows a modeststream of studies in quest of subjacent, comprehensive meanings: thecity as idea, as image, as metaphor. In approaching the present thispursuit of the city-idea requires increasing ingenuity, for nowadaysthe "city" is fast disappearing

Compiling Irregular Software to Specialized Hardware

High-level synthesis (HLS) has simplified the design process for energy-efficient hardware accelerators: a designer specifies an accelerator’s behavior in a “high-level” language, and a toolchain synthesizes register-transfer level (RTL) code from this specification. Many HLS systems produce efficient hardware designs for regular algorithms (i.e., those with limited conditionals or regular memory access patterns), but most struggle with irregular algorithms that rely on dynamic, data-dependent memory access patterns (e.g., traversing pointer-based structures like lists, trees, or graphs). HLS tools typically provide imperative, side-effectful languages to the designer, which makes it difficult to correctly specify and optimize complex, memory-bound applications. In this dissertation, I present an alternative HLS methodology that leverages properties of functional languages to synthesize hardware for irregular algorithms. The main contribution is an optimizing compiler that translates pure functional programs into modular, parallel dataflow networks in hardware. I give an overview of this compiler, explain how its source and target together enable parallelism in the face of irregularity, and present two specific optimizations that further exploit this parallelism. Taken together, this dissertation verifies my thesis that pure functional programs exhibiting irregular memory access patterns can be compiled into specialized hardware and optimized for parallelism. This work extends the scope of modern HLS toolchains. By relying on properties of pure functional languages, our compiler can synthesize hardware from programs containing constructs that commercial HLS tools prohibit, e.g., recursive functions and dynamic memory allocation. Hardware designers may thus use our compiler in conjunction with existing HLS systems to accelerate a wider class of algorithms than before

Preliminary design study of nuclear Brayton cycle/Heat Exchanger and Duct Assembly /HXDA/, phase 3 Topical report

Nuclear Brayton cycle heat exchanger and duct assembl

When the Meadow-Larks Are Calling, Annie Laurie

VERSE 1The dear old meadow larks were sweetly calling,It seemed to me they only called for you,The shadows of the twilight time were falling,And down your cheeks the tears were falling, too;You said “Goodbye” and kissed me when we parted,Your heart was filled with sorrow I could see,And then I turned and whispered, broken hearted,“When meadow larks are calling look for me” CHORUSWhen the meadow larks are calling, Annie darling,I’ll be waiting by the brooklet cool and clear;For my bonnie Annie Laurie,When the meadow larks are calling dear.” VERSE 2My heart is sad and lonely with its roaming,And longs to be with you beside the stream,For ev’ry where I wander in the gloaming,Your face appears to me as in a dream,So smile again, I’ll be with you tomorrow,The sweetest little girlie of them all,And then we’ll say “adieu” to all our sorrow,When larks down in the meadow softly call. CHORU

Abolition of the Insanity Defense Violates Due Process

This article, which is based on and expands on an amicus brief the authors submitted to the United States Supreme Court, first provides the moral argument in favor of the insanity defense. It considers and rejects the most important moral counterargument and suggests that jurisdictions have considerable leeway in deciding what test best meets their legal and moral policies. The article then discusses why the two primary alternatives to the insanity defense, the negation of mens rea and considering mental disorder at sentencing, are insufficient to achieve the goal of responding justly to severely mentally disordered offenders. The last section considers and rejects standard practical arguments in favor of abolishing the insanity defense

Velocity Dependence of the Differential Cross Sections for the Scattering of Atomic Beams of K and Cs by Hg

Measurements of the velocity dependence of the angular intensity distribution of potassium and cesium beams scattered by a crossed beam of mercury are presented. The alkali beam was velocity selected, with a triangular velocity distribution (half‐intensity width 4.7% of peak velocity); the velocity was varied over the range 185–1000 m/sec. The Hg beam had a thermal distribution; the average Hg speed was ∼235 meters per second. The scattering data have been converted to the center‐of‐mass system. The angular distributions show the expected strong forward scattering and evidence the phenomenon of rainbow scattering. The energy dependence of the rainbow angle is used to evaluate the interatomic potential well depth, interpreted as the dissociation energy De of the 2Σ+ molecular ground state. Values (in erg×1014) thus obtained (±5%) are 7.46 for KHg and 7.72 for CsHg. Absolute values of differential cross sections could not be obtained; only relative cross sections D(θ) are reported. The observed low‐angle behavior D(θ) ∝θ‐ 7/3 serves as direct experimental confirmation of the r—6 dependence of the long‐range attractive potential for K☒Hg and Cs☒Hg systems.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/69910/2/JCPSA6-37-9-2019-1.pd