Improving the performance of the Parallel Ice Sheet Model on a large-scale, distributed supercomputer

In this thesis, we describe our work to understand and improve the performance and scalability of the Parallel Ice Sheet Model (PISM) on the Ranger supercomputer. PISM enables the simulation of large-scale ice sheets, such as those found in Greenland and Antarctica, which are of particular interest to climate scientists due to their potential to contribute to sea-level rise. PISM has a unique parallel architecture that is designed to take advantage of the computational resources available on state-of-the-art supercomputers. The problem, however, is that even though PISM can run without modifcation on a supercomputer, it is generally unable to do so efficiently. We observed that PISM exhibits rapidly diminishing performance gains as the number of processors is increased, even experiencing an increase in execution time with large processor counts. PISM\u27s inability to make efficient use of the resources available on today\u27s supercomputers presents a challenge to researchers, particularly as larger and higher resolution data sets become available. In this work, we analyzed the reasons for PISM\u27s poor performance and developed techniques to address these issues, resulting in an increase in performance by as much as a factor of 20

Dynamic Resource Allocation in Conservation Planning

Consider the problem of protecting endangered species by selecting patches of land to be used for conservation purposes. Typically, the availability of patches changes over time, and recommendations must be made dynamically. This is a challenging prototypical example of a sequential optimization problem under uncertainty in computational sustainability. Existing techniques do not scale to problems of realistic size. In this paper, we develop an efficient algorithm for adaptively making recommendations for dynamic conservation planning, and prove that it obtains near-optimal performance. We further evaluate our approach on a detailed reserve design case study of conservation planning for three rare species in the Pacific Northwest of the United States

Lake County, Florida Solid Waste Management Plan

The history of solid waste management in Lake County, Florida is reviewed. The role of governmental agencies is mentioned. Local environmental characteristics and transportation systems are discussed. Existing collection and disposal practices are presented. A land use analysis of the unincorporated areas of the County is given. Projections of population and solid waste quantities are listed. Two computer models are presented. Their optimum solutions are analyzed in detail. The cost associated with implementing either plan is presented. A recommended plan is given based on a combination of transfer stations and sanitary landfills

ECONOMICS OF BIOMASS GASIFICATION/COMBUSTION AT FUEL ETHANOL PLANTS

Published in Applied Engineering in Agriculture, Vol. 25(3): 391‐400Ethanol, Biomass, Economics, CHP, Emissions, Process heat, Electricity production, Resource /Energy Economics and Policy,

INTEGRATING BIOMASS TO PRODUCE HEAT AND POWER AT ETHANOL PLANTS

Published in: Applied Engineering in Agriculture, Vol. 25(2): 227‐244Biomass, Renewable, Sustainable, Model, Gasification, Combustion, Emissions, Ethanol production, Combined heat and power, Resource /Energy Economics and Policy,

The Concordiensis, Volume 8, Number 1

Editorial; Local; Personals; General College Newshttps://digitalworks.union.edu/concordiensis_1884/1000/thumbnail.jp

The Concordiensis, Volume 8, Number 7

Editorial; Local; Personal; Exchangeshttps://digitalworks.union.edu/concordiensis_1885/1003/thumbnail.jp

The Concordiensis, Volume 8, Number 5

Editorial; Local; Personal; Exchangeshttps://digitalworks.union.edu/concordiensis_1885/1001/thumbnail.jp

The Concordiensis, Volume 8, Number 9

Commencement Exercises; Editorial Gossip; Localhttps://digitalworks.union.edu/concordiensis_1885/1005/thumbnail.jp

The Concordiensis, Volume 8, Number 2

Editorial; Local; Personal; General College Newshttps://digitalworks.union.edu/concordiensis_1884/1001/thumbnail.jp