Schatten - Eine Nächtliche Halluzination
Schatten is the German word for shadow. Schatten may also refer to: People * Gerald Schatten, a US stem cell researcher * Robert Schatten, a Polish mathematician Arts * Schatten – Eine nächtliche Halluzination ''Schatten – Eine nächtliche Halluzination'' ("Shadows - a Nocturnal Hallucination", known in English as ''Warning Shadows'') is a 1923 German silent film directed and co-written by Arthur Robison, and starring Fritz Kortner and Ruth Weyher ...

Shadow
A shadow is a dark area where light from a light source is blocked by an opaque object. It occupies all of the three-dimensional volume behind an object with light in front of it. The cross section of a shadow is a two-dimensional silhouette, or a reverse projection of the object blocking the light. Point and non-point light sources A point source of light casts only a simple shadow, called an "umbra". For a non-point or "extended" source of light, the shadow is divided into the umbra, penumbra, and antumbra. The wider the light source, the more blurred the shadow becomes. If two penumbras overlap, the shadows appear to attract and merge. This is known as the shadow blister effect. The outlines of the shadow zones can be found by tracing the rays of light emitted by the outermost regions of the extended light source. The umbra region does not receive any direct light from any part of the light source and is the darkest. A viewer located in the umbra region cannot directly se ...
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Gerald Schatten
Gerald Schatten (born 1949) is an American stem cell researcher with interests in cell, developmental, and reproductive biology. He is Professor and vice-chair of Obstetrics, Gynecology and Reproductive Sciences and Professor of Cell Biology and of Bioengineering in the Schools of Medicine and Engineering at the University of Pittsburgh, where he is also Director of the Division of Developmental and Regenerative Medicine at the university's School of Medicine. Additionally, he is deputy director of the Magee-Women's Research Institute and Director of the Pittsburgh Development Center.Gerald P. Schatten, PhD

Pittsburgh Development Center
. He is a member of the NCI-designated University of Pittsburgh Cancer ...
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Robert Schatten
Robert Schatten (January 28, 1911 – August 26, 1977) was an American mathematician. Robert Schatten was born to a Jewish family in Lviv. His intellectual origins were at Lwów School of Mathematics, particularly well known for fundamental contributions to functional analysis. His entire family was murdered during World War II, he himself emigrated to the United States. In 1933 he got '' magister'' degree at Jan Kazimierz University of Lwów, and in 1939 he got master's degree at Columbia University. Supervised by Francis Joseph Murray, he got doctorate degree in 1942 for the thesis "''On the Direct Product of Banach Spaces''". Shortly after being appointed to a junior professorship, he joined the United States army where during training he suffered a back injury which affected him for the remainder of his life. In 1943 he was appointed to an assistant professorship at University of Vermont. At National Research Council, by two years he worked with John von Neumann and Nelson D ...
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