Outdoor group portrait of attendees of the International Meeting of the World Union for Progressive Judaism; London.

Includes Rabbi Leo Baeck, E.L. Ehrlich of Basel, Herbert Strauss of Bern, and Rabbi Eugen Messinger of Bern

Herbert Strauss at a Zurich train station returning from the International Meeting of the World Union for Progressive Judaism in London.

Strauss completed his PhD examinations summa cum laude before leaving for the meeting, and was on his way to the American Consulate to get a visa for the United States

Studio portrait of Franz Matthiesen; London Portraits Men

Digital Image

Portrait of Franz Matthiesen; London Portraits Men

Digital Image

Walter and Freddy Godshaw (Gottschalk) with their uncle Ernst Meyerhof; London, England.

From left to right: Walter Godshaw, Ernst Meyerhof, and Freddy Godshaw

Ernst Gottschalk sitting in a car petting his dog Whip; London, England.

Digital Image

Portrait of Ralph and Joan Grahme with Ralph's sister Ilse Schuster nee Gottschalk and her husband James at restaurant "Old Vienna"; London, England.

Left to right: Ralph Grahme, Joan Grahme, Ilse Schuster nee Gottschalk, and James Schuster;

Non-Destructive Method to Estimate the Moisture Content in Bread using Multi-Channel Electrical Impedance Spectroscopy

Bread undergoes several physicochemical changes during storage that results in a rapid loss of freshness. These changes depend on moisture content present in bread product. An instrument based on electrical impedance spectroscopy technique is developed to estimate moisture content of bread at different zones using designed multi-channel ring electrodes. A dedicated AT89S52 microcontroller and associated peripherals are employed for hardware. A constant current is applied across bread loaf through central pair of electrodes and developed potential across different zones of bread loaf are measured using remaining four ring electrode pairs. These measured values of voltage and current are used to measure the impedance at each zone. Electrical impedance behavior of the bread loaf at crust and crumb is investigated during storage. A linear relationship is observed between the measured impedance and moisture content present in crust and crumb of bread loaf during storage of 120 hours.

A new method for generation of quasi-periodic structures withn fold axes: Application to five and seven folds

A new geometrical method for generating aperiodic lattices forn-fold non-crystallographic axes is described. The method is based on the self-similarity principle. It makes use of the principles of gnomons to divide the basic triangle of a regular polygon of 2n sides to appropriate isosceles triangles and to generate a minimum set of rhombi required to fill that polygon. The method is applicable to anyn-fold noncrystallographic axis. It is first shown how these regular polygons can be obtained and how these can be used to generate aperiodic structures. In particular, the application of this method to the cases of five-fold and seven-fold axes is discussed. The present method indicates that the recursion rule used by others earlier is a restricted one and that several aperiodic lattices with five fold symmetry could be generated. It is also shown how a limited array of approximately square cells with large dimensions could be detected in a quasi lattice and these are compared with the unit cell dimensions of MnAl6 suggested by Pauling. In addition, the recursion rule for sub-dividing the three basic rhombi of seven-fold structure was obtained and the aperiodic lattice thus generated is also shown.

Patrick Matthiesen on Aenny Catzenstein's 80th birthday; London.

Digital Image

Francine Durand at Aenny Catzenstein's 80th birthday; London Portraits Children

Digital Image

Patrick Matthiesen and Ara-Serge Donabedian at Aenny Catzenstein's 80th birthday; London Portraits Children

Digital Image

Beatrice Durand at Aenny Catzenstein's 80th birthday; London Portraits Children

Digital Image

Beatrice Durand at Aenny Catzenstein's 80th birthday; London Portraits Children

Digital Image

Francine and Jean-Pierre Durand at Aenny Catzenstein's 80th birthday; London Portraits Family

Digital Image