This paper describes the ASPEN system for automation of planning and scheduling for space mission operations. ASPEN contains a number of innovations including: an expressive but easy to use modeling language, multiple search (inference) engines, iterative repair suited for mixed-initiative human in loop operations, real-time replanning and response (in the CASPER system), and plan optimization....

Vegetative regeneration of aspen can be initiated through manipulations that provide hormonal stimulation, proper growth environment, and sucker protection—the three elements of the aspen regeneration triangle. The correct course of action depends upon a careful evaluation of the size, vigor, age, and successional status of the existing clone. Soils and site productivity, competition from other...

Algorithms to solve security games have seen successful real-world deployment by LAX police and the Federal Air Marshal Service. These algorithms provide randomized schedules to optimally allocate limited security resources for infrastructure protection. Unfortunately, these algorithms fail to scale-up or to provide a correct solution for massive security games with arbitrary scheduling constra...

This study aimed to determine whether Syrian (golden) hamsters, Mesocricetus auratus, prefer certain bedding materials and whether bedding material can affect paw condition, body weight gain and wheel-running activity. In a first experiment, 26 male hamsters had access to two connected cages, each cage containing a different bedding material (either pine shavings, aspen shavings, corn cob or wo...

Gray wolves (Canis lupus) were reintroduced into Yellowstone National Park in 1995–96, thus completing the park’s large predator guild. In the fall of 2010, approximately 15 years after wolf reintroduction, we sampled ten genera/species of berry-producing shrubs within 97 aspen (Populus tremuloides) stands in the park’s northern ungulate winter range. Regression analysis indicated shrub heights...

To study the impact of ozone (O3) and O3 plus CO2 on aspen growth, we planted two trembling aspen clones, differing in sensitivity to O3 in the ground in open-top chambers and exposed them to different concentrations of O3 and O3 plus CO, for 98 days. Ozone exposure (58 to 97 microl l(-1)-h. total exposure) decreased growth and modified crown architecture of both aspen clones. Ozone exposure de...

Conference Reports: Aspen Workshop on Numerical Investigations of Singularities in GR, Susan Scott . . . . 15 Second Annual Penn State Conference: Quantum Geometry, Abhay Ashtekar . . . . . . . 17 First Samos Meeting, Spiros Cotsakis and Dieter Brill . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Aspen Conference on Gravitational Waves and Their Detection, Syd Meshkov . . . . ...

A brief report on the goals and progress of the SLAC Linear Collider program is presented. Included are the status of the machine and detectors, and an overview of the physics program. Invited talk presented at the Aspen Winter Physics Conference Aspen, Colorado, January 13-19, 1985 * Work supported by the Department of Energy, contract DE-ACOS76SF00515.

Steady State to ASPEN plus (Aspen Technology, Inc. /www.aspentech.com /) Design Complex CHEMCAD (Chemstations, Inc. /www.chemstations.net /) Chemical Processes: Design II (WinSim Inc. /www.winsim.com /) gPROMS (Process Systems Enterprise Ltd. /www.psenterprise.com /) HYSYS (Hyprotech, Ltd. /www.hyprotech.com /) PEGS (CADcentre Ltd. /www.energyweb.net/OSO/) Pro II (SIMSCI-ESSCO division of Inven...