Analyzing the solutions of DEA through information visualization and data mining techniques: SmartDEA framework

Data envelopment analysis (DEA) has proven to be a useful tool for assessing efficiency or productivity of organizations, which is of vital practical importance in managerial decision making. DEA provides a significant amount of information from which analysts and managers derive insights and guidelines to promote their existing performances. Regarding to this fact, effective and methodologic analysis and interpretation of DEA solutions are very critical. The main objective of this study is then to develop a general decision support system (DSS) framework to analyze the solutions of basic DEA models. The paper formally shows how the solutions of DEA models should be structured so that these solutions can be examined and interpreted by analysts through information visualization and data mining techniques effectively. An innovative and convenient DEA solver, SmartDEA, is designed and developed in accordance with the proposed analysis framework. The developed software provides a DEA solution which is consistent with the framework and is ready-to-analyze with data mining tools, through a table-based structure. The developed framework is tested and applied in a real world project for benchmarking the vendors of a leading Turkish automotive company. The results show the effectiveness and the efficacy of the proposed framework

Determining All Universal Tilers

A universal tiler is a convex polyhedron whose every cross-section tiles the plane. In this paper, we introduce a certain slight-rotating operation for cross-sections of pentahedra. Based on a selected initial cross-section and by applying the slight-rotating operation suitably, we prove that a convex polyhedron is a universal tiler if and only if it is a tetrahedron or a triangular prism.Comment: 18 pages, 12 figure

Inflation misinformation and monetary policy

Monetary policy ; Inflation (Finance)

Hypercube Unfoldings that Tile R\u3csup\u3e3\u3c/sup\u3e and R\u3csup\u3e2\u3c/sup\u3e

We show that the hypercube has a face-unfolding that tiles space, and that unfolding has an edge-unfolding that tiles the plane. So the hypercube is a dimension-descending tiler. We also show that the hypercube cross unfolding made famous by Dali tiles space, but we leave open the question of whether or not it has an edge-unfolding that tiles the plane

Archaeometric Characterization of Roman Tile Fabrics from the Sangro Valley, Italy

In this paper, I use archaeometric methods to investigate the raw materials and manufacture of terracotta roof tiles from three Roman sites in the Sangro Valley, Abruzzo, Italy. Although fragmentary remains of the tegula and imbrex roof system are commonly uncovered at sites throughout the ancient world, these tiles are woefully understudied. Equally obscure are the workings of the economy of Samnium during and after its conquest by the Romans. As mass-produced industrial materials generally manufactured and used within a small radius, tiles may prove to be the ideal medium through which to explore the regional ceramic economy. This study applies ceramic petrography and x-ray fluorescence to tiles from the Sangro Valley Project\u27s excavations at Monte Pallano, Acquachiara, and San Giovanni, as well as to samples of local clays and regional coarsewares, in order to identify mineralogical and chemical patterns related to clay sourcing and tile production. These efforts cast doubt on the validity of current methods for identifying ceramic groups and creating fabric typologies, yet they simultaneously shed light on the nature of tile manufacturing in the ancient Sangro Valley, suggesting a pattern of decentralized production in a diffusely settled area. This, in turn, may prove significant for the archaeological interpretation of social and economic trends in the region

Spartan Daily, January 24, 1947

Volume 35, Issue 68https://scholarworks.sjsu.edu/spartandaily/8944/thumbnail.jp

Spartan Daily, January 24, 1947

Volume 35, Issue 68https://scholarworks.sjsu.edu/spartandaily/8944/thumbnail.jp

Spartan Daily, January 24, 1947

Volume 35, Issue 68https://scholarworks.sjsu.edu/spartandaily/8944/thumbnail.jp

Spartan Daily, January 24, 1947

Volume 35, Issue 68https://scholarworks.sjsu.edu/spartandaily/8944/thumbnail.jp