An automated tool for the design and assessment of space systems

Space systems can be characterized as both large and complex but they often rely on reusable subcomponents. One problem in the design of such systems is the representation and validation of the system, particularly at the higher levels of management. An automated tool is described for the representation, refinement, and validation of such complex systems based on a formal design theory, the Theory of Plausible Design. In particular, the steps necessary to automate the tool and make it a competent, usable assistant, are described

Alien Registration- Landry, Marie L. (Lewiston, Androscoggin County)

https://digitalmaine.com/alien_docs/28693/thumbnail.jp

Alien Registration- Landry, Marie L (Sanford, York County)

https://digitalmaine.com/alien_docs/3197/thumbnail.jp

In re Estate of Reed, 354 So. 2d 864 (Fla. 1978)

Constitutional Law- EQUAL PROTECTION-A FLORIDA STANDARD OF EQUAL PROTECTIO

Exploring the Effects of International Traffic in Arms Regulations Restrictions on Innovation in the U.S. Space Industrial Base

The International Traffic in Arms Regulations (ITAR) are used to protect United States (U.S.) military technologies. However, changes to ITAR export controls regarding space technologies have had a major impact to the U.S. space industry. The literature mentions a concern for the health of lower-tier firms because they are a major source of innovation, but there is no additional information considering the effects of ITAR on space innovation at those lower tiers. The purpose of this thesis was to explore the implications of continuing the current ITAR restrictions with regard to innovation in the space industry. This research used a three-part approach: Part I used personal interviews to explore perceptions from the space enterprise. Part II was a secondary analysis of previously collected data. Part III compared the results of Parts I and II to assess the relationship between ITAR and innovation in the space industry. The analysis shows there is no significant evidence that ITAR has a direct effect on space innovation. However, the industry may see some secondary negative effects on innovation. This thesis reveals a need to examine other second or third order effects of ITAR in economic and political environments to advise current ITAR reform efforts

Alien Registration- Landry, Marie L. (Auburn, Androscoggin County)

https://digitalmaine.com/alien_docs/30747/thumbnail.jp

Some Consumer Surplus Estimates for North Carolina Beaches

We estimate consumer surplus of a beach day using the single-site travel cost method. Onsite visitation data for seven North Carolina beaches were collected between July and November of 2003. Two pooled count data models, corrected for endogenous stratification and truncation, are estimated to account for bias stemming from onsite sampling. One model pertains to beach visitors that make single day trips to the beach, while the other is for visitors that stay onsite overnight. In each model, we allow for heterogeneity across sites through intercept-shifting and demand slope-shifting dummy variables. Depending upon the site, the estimated net benefits of a day at a beach in North Carolina range between $11 and$80 for those users making day trips and between $11 and$41 for those users that stay onsite overnight. These estimates are of the same order of magnitude as the results from earlier studies using travel cost methods but are considerably larger than the previous findings based upon stated preference methods.travel cost, consumer surplus, beach access, Resource /Energy Economics and Policy, D12, D63, H31, Q26,

Granular packings with moving side walls

The effects of movement of the side walls of a confined granular packing are studied by discrete element, molecular dynamics simulations. The dynamical evolution of the stress is studied as a function of wall movement both in the direction of gravity as well as opposite to it. For all wall velocities explored, the stress in the final state of the system after wall movement is fundamentally different from the original state obtained by pouring particles into the container and letting them settle under the influence of gravity. The original packing possesses a hydrostatic-like region at the top of the container which crosses over to a depth-independent stress. As the walls are moved in the direction opposite to gravity, the saturation stress first reaches a minimum value independent of the wall velocity, then increases to a steady-state value dependent on the wall-velocity. After wall movement ceases and the packing reaches equilibrium, the stress profile fits the classic Janssen form for high wall velocities, while it has some deviations for low wall velocities. The wall movement greatly increases the number of particle-wall and particle-particle forces at the Coulomb criterion. Varying the wall velocity has only small effects on the particle structure of the final packing so long as the walls travel a similar distance.Comment: 11 pages, 10 figures, some figures in colo