210,988 research outputs found
Proper Ferroelectricity in the Dion?Jacobson Material CsBi2Ti2NbO10: Experiment and Theory
No full textA diverse range of materials and properties are exhibited by layered perovskites. We report on the synthesis, characterization, and computational investigation of a new ferroelectric?CsBi2Ti2NbO10, an n = 3 member of the Dion?Jacobson (DJ) family. Structural studies using variable temperature neutron powder diffraction indicate that a combination of octahedral rotations and polar displacements result in the polar structure. Density functional theory calculations reveal that the wider perovskite blocks in CsBi2Ti2NbO0 stabilize proper ferroelectricity, in contrast to the hybrid-improper ferroelectricity reported for all other DJ phases. Our results raise the possibility of a new class of proper ferroelectric materials analogous to the well-known Aurivillius phases
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A letter from Eric Jacobson to Dr. Hector P. Garcia.
No full textA letter from Eric Jacobson, for the University of North Texas History Department, to Dr. Hector P. Garcia, thanking him for a recent meeting
Jacqueline and Marian Jacobson
No full textJacqueline Jacobson, left, and Marian Jacobson, right, daughters of Mr. and Mrs. Joseph M. Jacobson, shown with their dolls which are wearing matching dresses and bonnets. The young girls are sitting in their living room in front of the fireplace.https://mavmatrix.uta.edu/specialcollections_startelegram1940s/6375/thumbnail.jp
Rhabdotilla Jacobson 1911
No full textSubgenus Rhabdotilla Jacobson, 1911 Rhabdotilla Jacobson, 1911: pl. 59 (extralimital; type species Rhabdotilla rosti Jacobson, 1911, by monotypy [= Galeruca sexcostata Jacoby, 1904]). Galemira Beenen, 2003: 2 (type species Galeruca sexcostata Jacoby, 1904, by original designation). Remarks This Holarctic genus is represented in Canada and the United States by five species. They all belong to the subgenus Galeruca. See Figs 44 and 150 for a habitus illustration and morphological details. See Blake (1945) and Wilcox (1965) for keys to the New World species.Published as part of Viswajyothi, Keezhpattillam & Clark, Shawn M., 2022, New World genera of Galerucinae Latreille, 1802 (tribes Galerucini Latreille, 1802, Metacyclini Chapuis, 1875, and Luperini Gistel, 1848): an annotated list and identification key (Coleoptera: Chrysomelidae), pp. 1-102 in European Journal of Taxonomy 842 on page 14, DOI: 10.5852/ejt.2022.842.1945, http://zenodo.org/record/722249
Two U of M Crookston Students Awarded MNLA Scholarships
No full textJacobson, Sue; Tollefson, Elizabeth. (2007). Two U of M Crookston Students Awarded MNLA Scholarships. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/221108
Cryptocephalus (Cryptocephalus) krutovskii Jacobson 1901
No full textCryptocephalus (Cryptocephalus) krutovskii Jacobson, 1901 References. Medvedev 1973: 119 (southern Krasnoyarsk Krai (Uzun-Zhul tributary of the Abakan)). However, Medvedev attributed the type locality to southern Krasnoyarsk Krai;, in fact, it is Khakassia. Distribution. Asian Russia (Krasnoyarsky Krai (new record), Altais, Tuva, Sayans, Middle Siberia, S Yakutia, Far East), Mongolia, Japan. Material Examined. Stolby Nature Sanctuary, 15.vi.2017, 16 2♀ (E. Akulov) (EACK). Notes. Type locality: Uzun-Zhul tributary of the Abakan (Minusinsk Hollow). Described from the collections of A. Jacobson (Jacobson 1901).Published as part of Guskova, Elena V., Akulov, Evgeny N. & Loshchev, Sergey M., 2018, The Cryptocephalinae (Coleoptera: Chrysomelidae) of the Krasnoyarsk Krai (except for the Taymyrsky Dolgano-Nenetsky District), Siberia, Russia, pp. 565-576 in The Coleopterists Bulletin 72 (3) on page 572, DOI: 10.1649/0010-065X-72.3.565, http://zenodo.org/record/538417
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