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

A fast-Fourier-transform method of topography and interferometry is proposed. By computer processing of a noncontour type of fringe pattern, automatic discrimination is achieved between elevation and depression of the object or wave-front form, which has not been possible by the fringe-contour-generation techniques. The method has advantages over moire topography and conventional fringe-contour interferometry in both accuracy and sensitivity. Unlike fringe-scanning techniques, the method is easy to apply because it uses no moving components.

Fourier-transform method of fringe-pattern analysis for computer-based topography and interferometry

Over the past several years, cerium oxide and CeO2-containing materials have come under intense scrutiny as catalysts and as structural and electronic promoters of heterogeneous catalytic reactions. Recent developments regarding the characterization of ceria and CeO2-containing catalysts are critically reviewed with a special focus towards catalyst interaction with small molecules such as hydrogen, carbon monoxide, oxygen, and nitric oxide. Relevant catalytic and technological applications such as the use of ceria in automotive exhaust emission control and in the formulation of SO x reduction catalysts is described. A survey of the use of CeO2-containing materials as oxidation and reduction catalysts is also presented.

Catalytic Properties of Ceria and CeO2-Containing Materials

Note on Translation Introduction by Michael Holquist Response to a Question from the Novy Mir Editorial Staff The Bildungsroman and Its Significance in the History of Realism (Toward a Historical Typology of the Novel) The Problem of Speech Genres The Problem of the Text in Linguistics, Philology, and the Human Sciences: An Experiment in Philosophical Analysis From Notes Made in 1970-71 Toward a Methodology for the Human Sciences Index

Speech Genres and Other Late Essays

Speech Genres And Other Late Essays

Growth of III-nitrides on Si(1 1 1) by molecular beam epitaxy: Doping, optical, and electrical properties

Behaviour of rare earth sesquioxides exposed to atmospheric carbon dioxide and water

Response to acute protein load in kidney donors and in apparently normal postacute glomerulonephritis patients: evidence for glomerular hyperfiltration.

The behaviour of three different samples of La2O3 on exposure to atmoshperic CO2 and H2O and the influence of the origin is discussed. The thermal evolution of the samples, stabilized in air for months or even years, has been studied by TG, TPD, IR spectroscopy and X-ray diffraction. BET surface areas of the samples were determined from the corresponding nitrogen adsorption isotherms at 77 K. In all three samples, hydration and carbonation occur in bulk. In accordance with our results, lanthana samples stabilized in air would consist of lanthanum hydroxide, La(OH)3, partially carbonated, La2(OH)6−3x (CO3)x,(x⪝1). When hexagonal phases of La2O3, obtained by calcining, at 1130 K, the samples stabilized in air were re-exposed, hydration and carbonation levels similar to those observed in the stabilized samples were reached after less than 24 h. Some lanthana samples were soaked in water, at 298 K, and then dried at 380 K. In this way, the evolution of the oxide when treated under similar conditions to those used in both impregnation and ion exchange techniques for preparation of supported metal phases, could be investigated.

Study of some aspects of the reactivity of La2O3 with CO2 and H2O

This study investigated whether the anatomical differences between right and left internal jugular vein catheterization (RJVC and LJVC) would lead to differences in the frequency of complications, in particular, central vein occlusion (CVO). A group of 479 jugular vein catheterizations, 403 RJVC and 77 LJVC done in 294 prevalent hemodialysis patients were analyzed. A right-sided carotid pseudoaneurysm was the only major puncture-related complication. A total of 78 RJVC and 17 LJVC were inserted more than once in the same position. Of the RJVC, 44 (10.9%) of 403 were removed because of infection compared with 16 (20.8%) of 77 LJVC (P < 0.02). The overall incidence of infections was 1.58 episodes of infection per 1000 catheter days, 1.57 for RJVC and 3.72 for LJVC, respectively. Catheter dwell times were not different. A group of 127 patients with former RJVC and 44 with LJVC had ipsilateral arteriovenous access (RJVC+ and LJVC+ group, respectively). Four diabetic LJVC+ developed severe arm swelling secondary to CVO leading ultimately to access ligation. The RJVC+ group had no access ligated. LJVC may cause CVO in diabetics.

Rafael García

Papers

Growth of III-nitrides on Si(1 1 1) by molecular beam epitaxy: Doping, optical, and electrical properties

Behaviour of rare earth sesquioxides exposed to atmospheric carbon dioxide and water

Response to acute protein load in kidney donors and in apparently normal postacute glomerulonephritis patients: evidence for glomerular hyperfiltration.

Study of some aspects of the reactivity of La2O3 with CO2 and H2O

Right versus left internal jugular vein catheterization for hemodialysis: complications and impact on ipsilateral access creation.