1,731,003 research outputs found
Hellmann-Kirchberger Family Collection 1996
No full textThe collection contains photocopies of two scrapbook albums documenting the Hellmann and Kirchberger families, which
were connected through the 1907 marriage of Emil Hellmann and Hedwig Kirchberger. The albums were organized and assembled in 1996.
Volume I documents the Hellmann family and is organized by geographic origins, family history documents, and then individual family
member memorabilia. Volume II documents the Kirchberger family and is organized in the same fashion. Included in the albums are
biographical notes on family members, photographs, family trees, maps, correspondence, vital records, official documents, school
certificates, and clippings. Also included is an article on the Kirchberger family of Weilburg.Processed for digitizatio
Hellmann-Kirchberger family collection 1710-2014 1863-1915, 1937-1950
No full textThe collection holds diaries, memoirs, reports, letters and papers pertaining to five generations of the Hellmann-Kirchberger family. A prominent topic is the life of the family in the Lahn area in Rhineland in the 18th and 19th century. Additional topics are the emigration from Nazi-Germany and immigration to the United States. Letters and diaries that are included in the collection draw an intense picture of the distinct impacts of historical and social events from the 18th until the beginning of the 21st century.Prominent figures of the collection are, among others, Theodor Kirchberger, born on July 17, 1849, the son of Jacob Kirchberger, born in 1812, and Sophie Kirchberger, née Meyer Herz. Several diaries, reports and letters of their children and (great-) grandchildren are included in the collection.The Meyer-Herz, Kirchberger and Hellmann families were linked in 1907 through the marriage of Hedwig Kirchberger and Emil Hellmann. Both families maintained houses in Niederlahnstein and Weilburg in Rhineland, Germany for generations and were established in the region. The roots of the Kirchberger family in the Lahn area date back to the 17th century. Although the main part of the area’s inhabitants was Catholic, several old-established Jewish families lived in Niederlahnstein, Weilburg and the surroundings.ProcessedHellmann, Emil, -1944 ; Hellmann, Klaus, 1912-2009 ; Hellmann, Sieglinde, 1916-2015 ; Hellmann, Ulric, 1910-1999 ; Kirchberger, Matilde, 1872-1945 ; Kirchberger, Reinhard, 1909-1995 ; Kirchberger, Sophiedigitize
Hellmann-Lab/prime-seq: prime-seq paper revision
No full textFull Changelog: https://github.com/Hellmann-Lab/prime-seq/commits/v1.
International environmental agreements for local and global pollution
No full textGünther M, Hellmann T. International environmental agreements for local and global pollution. Journal of Environmental Economics and Management. 2017;81:38-58
Hellmann and Kromwell Families Collection 1778-1982
No full textThe Hellmann-Kromwell Family Collection includes a variety of documents of genealogical interest, including wedding, birth, and death announcements and family trees, with a particular emphasis on Dr. Johanna Hellmann's life and work. Some correspondence from the physicist Lise Meitner and the education reformer Helene Lange is also present.Johanna Hellmann was born in Nuremberg in 1899. At a young age, she became determined to study at a university. From 1912 until 1925 she completed medical training first in Berlin with Hans Virchow and later in Kiel in order to specialize as a surgeon. Remaining in Kiel during World War I, she assisted in the care of soldiers sent from the front. In 1916 she adopted a child, Irmgard Ahrendt, whose mother had died while pregnant and whose father was recuperating from a war injury. In 1921, the father began legal proceedings to have his daughter returned to his custody, and he eventually won. From 1929-1938 she worked as surgeon, urologist, and radiologist at the Charité clinic in Berlin, through which she oversaw the restructuring of a Salvation Army maternity ward to include a full surgical division. In 1938 she was forced by the Nazi government out of her position as head doctor and emigrated to Stockholm. During the time period from 1938-1947 she faced bureaucratic difficulties in obtaining regular work as a surgeon in Sweden. Also during this period she adopted a patient's daughter; this adoption became official, however, only in 1966. From 1947 onwards she was permitted to operate a private practice as an abdominal surgeon at the Red Cross Hospital in Stockholm, and she also authored papers with former mentor and German colleague Dr. Willy Anschütz on radiation treatment of breast cancer. She died in 1982 in Stockholm.Sophie Hellmann was born in 1894 in Nuremberg. Her father was the merchant David Hellmann, her mother was Fanny nee Kromwell. She served as a nurse in World War I and worked as a secretary in Belgium until 1918. She returned to Germany and worked in Berlin and Munich, where she became the private assistant to the economist Hanns Dorn, a position she held until his death in 1934. Since it was difficult for her to find employment, she immigrated to Denmark in 1935, where she was hired as Niels Bohr's private secreatry. In 1943, she fled to Sweden and worked as a secreatry and translator for J. Runnstrom. She returned to Demark and her work for Niels Bohr in 1945. After his death, she continued to work as translator and editor for scientific publications until her retirement at age 70. She died in 1979.The Kromwell family of Gunzenhausen, Middle Franconia, is related to Sophie and Johanna Hellmann through their mother Fanny Hellmann née Kromwell.The original inventory is available in folder 1.Processed for digitizationEAD createdReviseddigitize
R&D Investments Under Endogenous Cluster Formation
No full textDawid H, Hellmann T. R&D Investments Under Endogenous Cluster Formation. Journal of Economic Behavior and Organization. 2020;174:253-283
Evolution of social networks
No full textHellmann T, Staudigl M. Evolution of social networks. European Journal of Operational Research. 2014;234(3):583-596.Modeling the evolution of networks is central to our understanding of large communication systems, and more general, modern economic and social systems. The research on social and economic networks is truly interdisciplinary and the number of proposed models is huge. In this survey we discuss a small selection of modeling approaches, covering classical random graph models, and game-theoretic models to analyze the evolution of social networks. Based on these two basic modeling paradigms, we introduce co-evolutionary models of networks and play as a potential synthesis. (C) 2013 Elsevier B.V. All rights reserved
The Evolution of R&D Networks
No full textDawid H, Hellmann T. The Evolution of R&D Networks. Journal of Economic Behavior and Organization. 2014;105:158-172.We study the evolution of R&D networks in a Cournot model whererms may lower marginal costs due to bilateral R&D collaborations. Stochastically stable R&D networks exhibit the dominant group architecture, and, contrary to the existing literature, generically unique predictions about the size of the dominant group can be obtained. This size decreases monotonically with respect to the cost of link formation and there exists a lower bound on the size of the dominant group for non-empty networks. Stochastically stable networks are always inefficient and an increase in linking costs has a non-monotone effect on average industry profits
The dynamics of continuous cultural traits in social networks
No full textBuechel B, Hellmann T, Pichler MM. The dynamics of continuous cultural traits in social networks. Journal of Economic Theory. 2014;154:274-309
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