Exploring the Dynamics of Building Supply: A Duration Model of the Development Cycle

A noticeable omission in the existing body of applied real estate research is the lack of empirical analysis of the commercial development process. We address this shortcoming by utilizing a large panel database of individual building projects that in principle allows us to follow individual projects through various stages of their development life cycle. We begin by examining the basic distributional and time series characteristics of the development cycle, and then examine how these results vary by stage of construction, property sector and geography. We then estimate unconditional transition probabilities and finally, present preliminary results from a formal, nonparametric duration model.

Massive Vector Scattering in Lee-Wick Gauge Theory

We demonstrate that amplitudes describing scattering of longitudinally polarized massive vector bosons present in non-Abelian Lee-Wick gauge theory do not grow with energy and, hence, satisfy the constraints imposed by perturbative unitarity. This result contrasts with the widely-known violation of perturbative unitarity in the standard model with a very heavy Higgs. Our conclusions are valid to all orders of perturbation theory and depend on the existence of a formulation of the theory in which all operators are of dimension four or less. This can be thought of as a restriction on the kinds of higher dimension operator which can be included in the higher derivative formulation of the theory.Comment: 11 pages, no figure

Paper Session I-B - U.S. Expendable Liquid Rocket Propulsion Technology Trends: A Historical Perspective

U.S. liquid rocket propulsion technology has evolved over the past four decades to meet the changing needs of the user community and to enhance the national access to space capability. The lineage of today’s Atlas, Delta, and Titan Expendable Launch Vehicles (ELVs) is traceable to strategic missile system programs initiated in the 1950s. The Atlas and Delta ELVs were used to deploy the first weather, scientific, and communications satellites, and the Atlas D and Titan II ELVs were used to support NASA’s Mercury and Gemini manned space flight programs. Atlas, Delta, and Titan launch systems have continuously evolved over the years and have been used to deploy numerous lunar, planetary, and deep space exploration missions. The Titan III was the first ELV to incorporate solid strap-on booster motors to increase mission capability, and several variants of the Titan III vehicle were entered into service to adapt to East coast and West coast launch facilities and civil and military payloads. The Delta launch vehicle began to incorporate smaller solid strap-on boosters in the mid-1960s to increase performance and satisfy the demands of steadily increasing payload mass. The Atlas II launch system adopted the use of solid strap-on boosters in the early 1990s to accommodate a larger range of commercial payload mass (R-1)

Oxygen production and use in benthic mats of solar salt ponds

The benthic mat in the ponds of solar salt producers is important because as a beneficial effect, the mat reduces loss of brine from the field but it unfortunately also supports species which can have a serious detrimental effect on the halite crystallization process. Anaerobic and aerobic activity of the mat which is thought to be a significant factor in the management of the salt field is not quantified by traditional monitoring methods. A method of measuring the generation of oxygen from benthic algal mats, tested in the north west of Western Australia at three solar salt fields has been developed to estimate the benthic primary production in solar salt fields. Net oxygen production peaks at approximately 1 g m-2 over a 24 hour period for salt fields in the north-west of Western Australia. There was a significant linear relationship between production and salinity. Maximum production was 100 mmol O2 m-2 day-1 and the minimum was -11 mmol O2 m-2 day-1. The average oxygen production in ponds with a normal salinity within the range of 115-250 g 1-1 was 13 mmol O2 m-2 day-1. The relationship between dissolved oxygen demand at night versus salinity was not significant

Experience-Based Planning with Sparse Roadmap Spanners

We present an experienced-based planning framework called Thunder that learns to reduce computation time required to solve high-dimensional planning problems in varying environments. The approach is especially suited for large configuration spaces that include many invariant constraints, such as those found with whole body humanoid motion planning. Experiences are generated using probabilistic sampling and stored in a sparse roadmap spanner (SPARS), which provides asymptotically near-optimal coverage of the configuration space, making storing, retrieving, and repairing past experiences very efficient with respect to memory and time. The Thunder framework improves upon past experience-based planners by storing experiences in a graph rather than in individual paths, eliminating redundant information, providing more opportunities for path reuse, and providing a theoretical limit to the size of the experience graph. These properties also lead to improved handling of dynamically changing environments, reasoning about optimal paths, and reducing query resolution time. The approach is demonstrated on a 30 degrees of freedom humanoid robot and compared with the Lightning framework, an experience-based planner that uses individual paths to store past experiences. In environments with variable obstacles and stability constraints, experiments show that Thunder is on average an order of magnitude faster than Lightning and planning from scratch. Thunder also uses 98.8% less memory to store its experiences after 10,000 trials when compared to Lightning. Our framework is implemented and freely available in the Open Motion Planning Library.Comment: Submitted to ICRA 201

Interview with Phyllis Coleman and Mark Dobson - Professors of Law

Law school, Parker building, facilities, Johnny Burris, Ovid Lewis, President Feldman, 9th Avenue Building, union building, Ferrero, Fischler, Joel Berman, Bruce Rogow, Joe Smith, Rolling Hills Country Club, Peter Thornton, Larry Hyde, Don Llewellyn, dean, full ABA accreditation, Uni-trust, scholarship, LSAT, Goodwin, John Anderson, Joe Harbaugh, Roger Abrams, leadership, fourth-tier, George Hanbury, Association of American Law Schools, AAMPLE Program, Summer Conditional Program, Alternative Admissions, Career Development Officehttps://nsuworks.nova.edu/nsudigital_oralhistories/1029/thumbnail.jp

Household Food Security in the United States in 2010

An estimated 85.5 percent of American households were food secure throughout the entire year in 2010, meaning that they had access at all times to enough food for an active, healthy life for all household members. The remaining households (14.5 percent) were food insecure at least some time during the year, including 5.4 percent with very low food security—meaning that the food intake of one or more household members was reduced and their eating patterns were disrupted at times during the year because the household lacked money and other resources for food. The prevalence rate of very low food security declined from 5.7 percent in 2009, while the change in food insecurity overall (from 14.7 percent in 2009) was not statistically significant. The typical food-secure household spent 27 percent more on food than the typical food-insecure household of the same size and household composition. Fifty-nine percent of all food-insecure households participated in one or more of the three largest Federal food and nutrition assistance programs during the month prior to the 2010 survey.Food security, food insecurity, food spending, food pantry, soup kitchen, emergency kitchen, material well-being, SNAP, Food Stamp Program, National School Lunch Program, WIC, Food Security and Poverty,

Life-history and ecology of the greenback cutthroat trout

Prepared for: the Greenback Cutthroat Trout Recovery Team.Includes bibliographical references

Is Purity Eternal?

Phenomenological and formal restrictions on the evolution of pure into mixed states are discussed. In particular, it is argued that, if energy is conserved, loss of purity is incompatible with the weakest possible form of Lorentz covariance.Comment: 12 pages, in Plain Tex; section 3 on Lorentz covariance expanded and improved in response to year-long correspondence with the referee, but the conclusions are unchanged; UCSBTH-92-2