Tombstones of Joseph Benjamin and Marianne Benjamin nee Sussmann; Strangriede Cemetery (R 83.8 and R 83.9); Hannover Cemeteries Tombs

Digital Image

Tombstones of Lea Benjamin nee Levy and Herz Benjamin; Strangriede Cemetery (R 83.11 and R 83.12); Hannover Cemeteries Tombs

Digital Image

Adolpf Molling, Janet Krakauer nee McColl, Hymie Joachim and Thomas Krakauer (l-r); Weggis, Switzerland Portraits Groups

Digital Image

Tombstone of Joseph Benjamin; Strangriede Cemetery (R 83.8); Hannover Cemeteries Tombs

Digital Image

Tombstone of Sophie Molling nee Benjamin; Strangriede Cemetery (R 20.09); Hannover Cemeteries Tombs

Digital Image

Tombstone of Lea Benjamin nee Levy; Strangriede Cemetery (R 83.11); Hannover Cemeteries Tombs

Digital Image

Family portrait of (back l-r) Frieda Arens, Fritz Unger, Gustav Arens, Grete Glasner, (front l-r) Lise Arens, Gitta Unger and Ernst Glasner.

Digital Image

The conservation status of the world’s reptiles

Effective and targeted conservation action requires detailed information about species, their distribution, systematics and ecology as well as the distribution of threat processes which affect them. Knowledge of reptilian diversity remains surprisingly disparate, and innovative means of gaining rapid insight into the status of reptiles are needed in order to highlight urgent conservation cases and inform environmental policy with appropriate biodiversity information in a timely manner. We present the first ever global analysis of extinction risk in reptiles, based on a random representative sample of 1500 species (16% of all currently known species). To our knowledge, our results provide the first analysis of the global conservation status and distribution patterns of reptiles and the threats affecting them, highlighting conservation priorities and knowledge gaps which need to be addressed urgently to ensure the continued survival of the world’s reptiles. Nearly one in five reptilian species are threatened with extinction, with another one in five species classed as Data Deficient. The proportion of threatened reptile species is highest in freshwater environments, tropical regions and on oceanic islands, while data deficiency was highest in tropical areas, such as Central Africa and Southeast Asia, and among fossorial reptiles. Our results emphasise the need for research attention to be focussed on tropical areas which are experiencing the most dramatic rates of habitat loss, on fossorial reptiles for which there is a chronic lack of data, and on certain taxa such as snakes for which extinction risk may currently be underestimated due to lack of population information. Conservation actions specifically need to mitigate the effects of human-induced habitat loss and harvesting, which are the predominant threats to reptiles.

Studio portrait of infant twins Beatrice and Fred Herz (l-r).

The Herz twins were born 4 February 1913

Reproduction of grammar school class portrait including Ella, Beatrice and Rose Herz (circled l-r).

Digital Image

R-parameter: A local truncation error based adaptive framework for finite volume compressible flow solvers

A residual-based strategy to estimate the local truncation error in a finite volume framework for steady compressible flows is proposed. This estimator, referred to as the -parameter, is derived from the imbalance arising from the use of an exact operator on the numerical solution for conservation laws. The behaviour of the residual estimator for linear and non-linear hyperbolic problems is systematically analysed. The relationship of the residual to the global error is also studied. The -parameter is used to derive a target length scale and consequently devise a suitable criterion for refinement/derefinement. This strategy, devoid of any user-defined parameters, is validated using two standard test cases involving smooth flows. A hybrid adaptive strategy based on both the error indicators and the -parameter, for flows involving shocks is also developed. Numerical studies on several compressible flow cases show that the adaptive algorithm performs excellently well in both two and three dimensions.

Sitting l-r Rabbi Dudley Weinberg, Leo Baeck, Joseph H. Cohen, Dr. Joshua Liebman; Standing l-r Max Feldberg, Louis Salvage, Rabbi Beryl D. Cohon, Harry Penn, Abraham Schiller; Boston Portraits; Groups; Men

Page 58 of the "American Jewish Cavalcade" scrapbook of Leo Baeck in New York found in ROS 10 Folder 3