Computers for simulation of space vehicle systems

Computerized simulation of space vehicle system

Math modeling and computer mechanization for real time simulation of rotary-wing aircraft

Mathematical modeling and computer mechanization for real time simulation of rotary wing aircraft is discussed. Error analysis in the digital simulation of dynamic systems, such as rotary wing aircraft is described. The method for digital simulation of nonlinearities with discontinuities, such as exist in typical flight control systems and rotor blade hinges, is discussed

Virtual Capstone Design Teams: Preparing for Global Innovation (Journal article)

Global innovation requires collaboration between groups of people located in different parts of the world, and is a growing trend in industry. Virtual teams are often used to manage new product development projects. These teams are similar to traditional teams but are geographically separated and rely heavily on virtual methods of communication (email, Skype, teleconferencing, etc.) instead of regular face-to-face meetings. Experience working as a member of a virtual capstone design team can help prepare students for this growing trend. To begin preparing students for work on virtual teams in industry, we co-advised two virtual capstone design projects with students from Marquette University and Smith College. This paper describes our experience with managing two virtual capstone design project teams across institutions. Presented here are the challenges we encountered, the lessons we learned as a result of this experience, as well our recommendations for others who might want to include virtual project teams in their capstone design courses. We also include retrospective feedback from the students on these teams regarding their perceived value of their virtual team experience to their careers in engineering

Virtual Capstone Design Teams: Preparing for Global Innovation (Conference proceeding)

Global innovation requires collaboration between groups of people located in different parts of the world, and is a growing trend in industry. Virtual teams are often used to manage new product development projects. These teams are similar to traditional teams but are geographically separated and rely heavily on virtual methods of communication (email, Skype, teleconferencing, etc.) instead of regular face-to-face meetings. Experience working as a member of a virtual capstone design team can help prepare students for this growing trend. To begin preparing students for work on virtual teams in industry, we co-advised two virtual capstone design projects with students from Marquette University and Smith College. This paper describes our experience with managing two virtual capstone design project teams across institutions. Presented here are the challenges we encountered, the lessons we learned as a result of this experience, as well our recommendations for others who might want to include virtual project teams in their capstone design courses. We also include retrospective feedback from the students on these teams regarding their perceived value of their virtual team experience to their careers in engineering

Development of on-line man-machine system performance measurement and display techniques Letter progress report, Jun. 1 - Aug. 31, 1965

Human performance characteristics in manual control tasks, and techniques for data analysis and systems simulatio

Evolutionary Models of Super-Earths and Mini-Neptunes Incorporating Cooling and Mass Loss

We construct models of the structural evolution of super-Earth- and mini-Neptune-type exoplanets with hydrogen-helium envelopes, incorporating radiative cooling and XUV-driven mass loss. We conduct a parameter study of these models, focusing on initial mass, radius, and envelope mass fractions, as well as orbital distance, metallicity, and the specific prescription for mass loss. From these calculations, we investigate how the observed masses and radii of exoplanets today relate to the distribution of their initial conditions. Orbital distance and initial envelope mass fraction are the most important factors determining planetary evolution, particular radius evolution. Initial mass also becomes important below a "turnoff mass," which varies with orbital distance, with mass-radius curves being approximately flat for higher masses. Initial radius is the least important parameter we study, with very little difference between the hot start and cold start limits after an age of 100 Myr. Model sets with no mass loss fail to produce results consistent with observations, but a plausible range of mass loss scenarios is allowed. In addition, we present scenarios for the formation of the Kepler-11 planets. Our best fit to observations Kepler-11b and Kepler-11c involves formation beyond the snow line, after which they moved inward, circularized, and underwent a reduced degree mass loss.Comment: 17 pages, 18 figures, 1 table, Accepted to Ap

Identification of Sequences Encoding Symbiodinium minutum Mitochondrial Proteins.

The dinoflagellates are an extremely diverse group of algae closely related to the Apicomplexa and the ciliates. Much work has previously been undertaken to determine the presence of various biochemical pathways within dinoflagellate mitochondria. However, these studies were unable to identify several key transcripts including those encoding proteins involved in the pyruvate dehydrogenase complex, iron-sulfur cluster biosynthesis, and protein import. Here, we analyze the draft nuclear genome of the dinoflagellate Symbiodinium minutum, as well as RNAseq data to identify nuclear genes encoding mitochondrial proteins. The results confirm the presence of a complete tricarboxylic acid cycle in the dinoflagellates. Results also demonstrate the difficulties in using the genome sequence for the identification of genes due to the large number of introns, but show that it is highly useful for the determination of gene duplication events

<development of on-line man-machine system performance measurement and display techniques< letter progress report, 1 mar. - 31 may 1965

Man-machine performance measurement

Congress’s War Powers and the Political Question Doctrine After Smith v. Obama

More than seventeen years after the attacks of September 11, 2001, the United States continues to battle terrorist organizations inspired by or derived from al Qaeda under the legal aegis of the 2001 Authorization for the Use of Military Force. The government has interpreted this law as providing expansive authority to conduct military operations against actors that did not even exist in 2001, including the Islamic State of Iraq and Syria (“ISIS”). Congress has largely supported this effort in annual authorizing legislation and by funding the campaign against ISIS. Despite this permissive legal environment, the government pressed for even greater flexibility in Smith v. Obama , a 2016 challenge to the legal basis for the anti-ISIS campaign, arguing that the war powers are subject to the political question doctrine and thus outside the purview of the courts. The district court accepted this argument, contravening recent Supreme Court decisions that narrow the doctrine’s scope. In doing so, the Smith court cast doubt on the primacy of Congress in bringing the United States into war. In response, this Note offers three insights. First, it assesses historical decisions in cases implicating executive branch war powers in light of the modern political question doctrine. Second, it critiques the Smith court’s failure to squarely confront the separation of powers questions presented by the case. Finally, it offers a series of recommendations for Congress and the courts to avoid the pitfalls of the political question doctrine in similar cases in the future