Some Remarks about the Usage of Asymmetric Correlation Measurements for the Induction of Decision Trees

Decision trees are used very successfully for the identification resp. classification task of objects in many domains like marketing (e.g. Decker, Temme (2001)) or medicine. Other procedures to classify objects are for instance the logistic regression, the logit- or probit analysis, the linear or squared discriminant analysis, the nearest neighbour procedure or some kernel density estimators. The common aim of all these classification procedures is to generate classification rules which describe the correlation between some independent exogenous variables resp. attributes and at least one endogenous variable, the so called class membership variable. --

Commutants of von Neumann Modules, Representations of B^a(E) and Other Topics Related to Product Systems of Hilbert Modules

We review some of our results from the theory of product systems of Hilbert modules. We explain that the product systems obtained from a CP-semigroup in a paper by Bhat and Skeide and in a paper by Muhly and Solel are commutants of each other. Then we use this new commutant technique to construct product systems from E_0-semigroups on B^a(E) where E is a strongly full von Neumann module. (This improves the construction from a paper by Skeide for Hilbert modules where existence of a unit vector is required.) Finally, we point out that the Arveson system of a CP-semigroup constructed by Powers from two spatial E_0-semigroups is the product of the corresponding spatial Arveson systems as defined (for Hilbert modules) in a paper by Skeide. It need not coincide with the tensor product of Arveson systems.Comment: To appear in Proceedings of ``Advances in Quantum Dynamics'', Mount Holyoke, 200

The science of color and color vision

A survey of color science and color vision

A mathematical model of the UH-60 helicopter

This report documents the revisions made to a ten-degree-of-freedom, full-flight envelope, generic helicopter mathematical model to represent the UH-60 helicopter accurately. The major modifications to the model include fuselage aerodynamic force and moment equations specific to the UH-60, a canted tail rotor, a horizontal stabilator with variable incidence, and a pitch bias actuator (PBA). In addition, this report presents a full set of parameters and numerical values which describe the helicopter configuration and physical characteristics. Model validation was accomplished by comparison of trim and stability derivative data generated from the UH-60 math model with data generated from a similar total force and moment math model

One Upper Estimate on the Number of Limit Cycles of Even Degree Li\'enard Equations in the Focus Case

We give an explicit upper bound for a number of limit cycles of the Li\'enard equation $\dot{x}=y-F(x)$, $\dot{y}=-x$ of even degree in the case its unique singular point $(0,0)$ is a focus.Comment: 10 pages, 1 figur

Energy Poverty in Buffalo\u27s West Side: PUSH, National Fuel, and the Fight for Equitable Energy Access

Energy poverty, the condition of households that cannot adequately heat their homes, is a chronic problem resulting from low income, high fuel prices, and poorly insulated, energy inefficient houses. In addition to financial strain, energy poverty causes severe social and health problems for people living in under-heated homes (Boardman 1991; 2013). Despite its seriousness and pervasiveness, energy poverty has been ignored too often in the US. Those that suffer through energy poverty each year, trapped in bitterly cold homes and facing exorbitant fuel bills, have only rarely organized effectively to demand necessary changes, making the case of People United for Sustainable Housing (PUSH) so significant. Through community organizing, advocacy, and protest, PUSH catalyzed unprecedented shifts in the distribution of energy conservation funding in Western New York, ensuring that a greater share went toward low-income households for weatherization