There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality.

Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

I and i

THE DESIGN AND ANALYSIS OF EXPERIMENTS. By Oscar Kempthorne. New York, John Wiley and Sons, Inc., 1952. 631 pp. $8.50. This book by a teacher of statistics (as well as a consultant for \"experimenters\") is a comprehensive study of the philosophical background for the statistical design of experiment. It is necessary to have some facility with algebraic notation and manipulation to be able to use the volume intelligently. The problems are presented from the theoretical point of view, without such practical examples as would be helpful for those not acquainted with mathematics. The mathematical justification for the techniques is given. As a somewhat advanced treatment of the design and analysis of experiments, this volume will be interesting and helpful for many who approach statistics theoretically as well as practically. With emphasis on the \"why,\" and with description given broadly, the author relates the subject matter to the general theory of statistics and to the general problem of experimental inference. MARGARET J. ROBERTSON

The Design and Analysis of Experiments

Probability Distributions.- Linear Models for Regression.- Linear Models for Classification.- Neural Networks.- Kernel Methods.- Sparse Kernel Machines.- Graphical Models.- Mixture Models and EM.- Approximate Inference.- Sampling Methods.- Continuous Latent Variables.- Sequential Data.- Combining Models.

Pattern Recognition and Machine Learning

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Principles Of Fluorescence Spectroscopy

In this chapter, we will restrict our attention to the ferrites and a few other closely related materials. The great interest in ferrites stems from their unique combination of a spontaneous magnetization and a high electrical resistivity. The observed magnetization results from the difference in the magnetizations of two non-equivalent sub-lattices of the magnetic ions in the crystal structure. Materials of this type should strictly be designated as “ferrimagnetic” and in some respects are more closely related to anti-ferromagnetic substances than they are to ferromagnetics in which the magnetization results from the parallel alignment of all the magnetic moments present. We shall not adhere to this special nomenclature except to emphasize effects, which are due to the existence of the sub-lattices.

Ferromagnetic materials

This chapter describes different desulfurization technologies used for the removal of sulfur from petroleum products or from refined products. These technologies include hydrodesulfurization and non-hydrodesulphurization such as extractive desulphurization, adsorptive desulfurization, precipitative desulphurization, oxidative desulphurization, and desulfurization by membranes. Types of reactors including batch and fixed bed reactors are discussed. The chapter also highlights some of the common mechanism to explain the desulphurization process.

Advanced Desulfurization Technologies and Mechanisms

Cross-linked cyclocopolymers made up of one or more quaternary ammonium salts and sulfur dioxide as monomers. One of the quaternary ammonium salts is also an aspartic acid derivative. The cross-linked copolymers include a repeating unit with multiple chelating centers that different metal ions can bind to. The cross-linked copolymers are zwitterionic or anionic, and can be in either an acidic form or a basic form. A method for removing metal ions from an aqueous sample with these cross-linked copolymers is also described.

Method for removing heavy metals from an aqueous solution with cross-linked copolymers

Scalable ambient conditions-based fabrication of flower-like bismuth vanadate (BiVO4) film incorporating defects aimed at visible-light-induced water-splitting application

Cross-linked tetrapolymers made up of different diallyl zwitterionic diallyl quaternary ammonium salt monomers, with one of them functioning as a cross-linking monomer The cross-linked terpolymers include a repeating unit with multiple ligand centers that different metal ions can bind to The cross-linked tetrapolymers are cationic, zwitterionic and anionic, and can be in either an acidic form or a basic form A method of removing metal ions from an aqueous solution with these cross-linked tetrapolymers is also described

Cross-linked diallyl quaternary ammonium salt tetrapolymers and methods thereof

Activated carbon\nickel oxide\zinc oxide (AC\NiO\ZnO) and activated carbon\zinc oxide (AC\ZnO) were prepared and used as adsorbents for removal of thiophene, benzothiophene (BT) and dibenzothiophene (DBT) as sulfur compounds from hydrocarbon materials such as diesel fuel. The materials exhibited an efficient and economical way for removing sulfur compounds due to its low-energy consumption, ambient operation temperature and atmospheric pressure. A simple regeneration method of the spent adsorbents.

Tawfik A. Saleh

Papers

Advanced Desulfurization Technologies and Mechanisms

Method for removing heavy metals from an aqueous solution with cross-linked copolymers

Scalable ambient conditions-based fabrication of flower-like bismuth vanadate (BiVO4) film incorporating defects aimed at visible-light-induced water-splitting application

Cross-linked diallyl quaternary ammonium salt tetrapolymers and methods thereof

Methods for preparing composites of activated carbon/zinc oxide and activated carbon/zinc oxide/nickel oxide for desulfurization of fuels