The purpose of this paper is to propose a system and process for maximizing store profits to discover the optimal price pattern among various items based on a purchase prediction models. This system, called PRISM, involves the use of data mining techniques to handle a large amount of customer purchase history data. In this paper we have applied PRISM to the customer data of supermarket in Japan...

PRISM is a probabilistic-logical programming language based on Prolog. We present a PRISM-implementation of a general model for polyphonic music, based on Hidden Markov Models. Its probability parameters are automatically learned by running the built-in EM-algorithm of PRISM on training examples. We show how the model can be used as a classifier for music that guesses the composer of unknown fr...

A prism grating using polymer stabilized liquid crystal was fabricated and its diffraction characteristics evaluated. Such a prism grating exhibits not only a periodic grating structure but also a prism-like gradient refractive index within each grating period. As a result, the diffraction behavior is asymmetric. The first order exhibits high diffraction efficiency while the zeroth order has a ...

PRISM is a probabilistic logic programming formalism which allows learning parameters from examples through its graphical EM algorithm. PRISM is aimed at modelling generative processes in the compact first-order logic representation. It facilitates model selection by providing three scoring functions Bayesian Information Criterion (BIC), Cheeseman-Stutz (CS) and Variational free energy. This pa...

This paper describes the design, fabrication, and testing of two hollow prisms. One is a prism with a grating glued to its hypotenuse. This ensemble, prism + grating, is called a grism. It can be applied as an on-axis tunable spectrometer. The other hollow prism is a constant deviation one called a Pellin-Broca. It can be used as a tunable dispersive element in a spectrometer with no moving par...

The PhET Interactive Simulations are well-known resources that originated in physics and are now used in multiple science disciplines. Many new educational innovations are developed but do not find a large audience—PhET, however, has been successful in becoming widely-used. This is the first of several planned case studies of widely-used educational innovations to characterize the strategies us...

H.-H. Hinrichsen1, B. von Dewitz1, J. Dierking1, H. Haslob2, A. Makarchouk3, C. Petereit1 and R. Voss4 1GEOMAR – Helmholtz Centre for Ocean Research, Düsternbrooker Weg 20, 24105 Kiel, Germany 2Thünen-Institute of Sea Fisheries, Palmaille 9, 22767 Hamburg, Germany 3Fishery Resources Research Department, Institute of Food Safety, Animal Health and Environment ‘BIOR’, Daugavgrivas 8, Riga 1048, L...

It is demonstrated that strong asymmetry in transmission can be obtained at the Gaussian beam illumination for a single prism based on a photonic crystal (PhC) with isotropic-type dispersion, as well as for its analog made of a homogeneous material. Asymmetric transmission can be realized with the aid of refraction at a proper orientation of the interfaces and wedges of the prism, whereas neith...