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Baker B.,Baker Corporation
IBM Data Management Magazine | Year: 2010

Are you following best practices in your programming methods? Bonnie Baker offers up more examples of bad SQL habits that need to be broken to help eliminate or reduce conversations with DB2 for z/OS. Source


Baker B.,Baker Corporation
IBM Data Management Magazine | Year: 2010

Bonnie Baker explores the use of SQL predicates-how they may improve performance, and how DB2 works with predicate statements in parsing. Source


Wojtowicz R.L.,Baker Corporation | Wojtowicz R.L.,Shepherd University
Innovations in Systems and Software Engineering | Year: 2016

In this paper, we give an overview of sketch theory as a knowledge management framework and discuss its strengths relative to logic, the semantic web and relational algebra. Sketch theory, for example, supports modularity among meta-data, instance data and uncertainty. It also provides a notion of constraint-preserving map. We explore Q-trees as a technique for inference with sketches and compare it to logical deduction. Ideas can be formulated in distinct ways even within a fixed formalism. We illustrate solution of this alignment problem using sketches and the notion of Morita equivalence of logical theories. Sketch theory provides rich notions of contextual view with which we compute illustrative examples. Finally, we outline a program for advancing sketch theory as a complement to other knowledge management technologies and discuss transformations between sketches and other models. © 2015, Springer-Verlag London. Source


Villotti L.,Baker Corporation
Public Roads | Year: 2013

Communities ins Southwestern Pennsylvania used the scenario planning process to develop a vision scenario that prioritizes investments in revitalization and redevelopment of existing infrastructure. In the early years of developing growth projections, they were almost purely developed using straight-lined trending. That process involves simply carrying the most recent past trends from the current situation to some point in future, using an annual growth factor. Although accurate in the near term, the overall usefulness of this approach over time was dependent on duration and stagnation. The farther from the origination date, the less accurate the projections became, because the important input variables changed, instead of staying stagnant, and their ability to maintain accuracy degraded. A scenario is essentially a story about the future that helps people understand the forces of change and the collective choices they have. Source


Markus M.,University of Illinois at Urbana - Champaign | Knapp H.V.,University of Illinois at Urbana - Champaign | Flegel A.,University of Illinois at Urbana - Champaign | McConkey S.,University of Illinois at Urbana - Champaign | Thomas W.O.,Baker Corporation
Journal of Hydrologic Engineering | Year: 2013

Decreasing annual maximum flood peaks on the rivers and streams in the Wisconsin driftless area have been reported in recent studies. Various explanations have been offered, generally suggesting different episodes or change points separating the early periods of higher peak flows from the more recent lower peak flows. The present research used two statistical tests to detect a change point in annual flood peaks at Freeport on the Pecatonica River for the period 1914-2008. Both tests indicated that the most significant change occurred in 1954. Next, to find an explanation for the decreasing peaks, this research carried out a seasonal analysis of flood timing. The decrease in winter flood peaks was partly explained by the decrease in snow depth and the increase in winter temperature, providing less favorable conditions for winter flooding. In turn, the decrease in winter peak flows made once smaller summer peak flows more dominant in recent years, causing the shift in flood timing. Similar analysis showed a significant degree of resemblance between the Pecatonica River and several streams in its vicinity. © 2013 American Society of Civil Engineers. Source

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