92,939 research outputs found
Carl Friedrich Geiser and Ferdinand Rudio : the men behind the first International Congress of Mathematicians
No full textThe first International Congress of Mathematicians (ICM) was held in Zurich in 1897, setting the standards for all future ICMs. Whilst giving an overview of the congress itself, this thesis focuses on the Swiss organisers, who were predominantly university professors and secondary school teachers. As this thesis aims to offer some insight into their lives, it includes their biographies, highlighting their individual contributions to the congress. Furthermore, it explains why Zurich was chosen as the first host city and how the committee proceeded with the congress organisation.
Two of the main organisers were the Swiss geometers Carl Friedrich Geiser (1843-1934) and Ferdinand Rudio (1856-1929). In addition to the congress, they also made valuable contributions to mathematical education, and in Rudio’s case, the history of mathematics. Therefore, this thesis focuses primarily on these two mathematicians.
As for Geiser, the relationship to his great-uncle Jakob Steiner is explained in more detail. Furthermore, his contributions to the administration of the Swiss Federal Institute of Technology are summarised. Due to the overarching theme of mathematical education and collaborations in this thesis, Geiser’s schoolbook "Einleitung in die synthetische Geometrie" is considered in more detail and Geiser’s methods are highlighted.
A selection of Rudio’s contributions to the history of mathematics is studied as well. His book "Archimedes, Huygens, Lambert, Legendre" is analysed and compared to E W Hobson’s treatise "Squaring the Circle". Furthermore, Rudio’s papers relating to the commentary of Simplicius on quadratures by Antiphon and Hippocrates are considered, focusing on Rudio’s translation of the commentary and on "Die Möndchen des Hippokrates". The thesis concludes with an analysis of Rudio’s popular lectures "Leonhard Euler" and "Über den Antheil der mathematischen Wissenschaften an der Kultur der Renaissance", which are prime examples of his approach to the history of mathematics
Geiser et al. Longitudinal Structural Equation Modeling Chapter Mplus Examples
No full textMplus output files for data examples presented in
Geiser, C., Hintz, F. A., Burns, G. L., & Servera, M. (in preparation). Longitudinal structural equation modeling of personality data. In J. F. Rauthmann (Ed.), Handbook of personality dynamics and processes. Elsevier
Geiser et al. Multitrait-Multimethod-Multioccasion Modeling Chapter Mplus Examples
No full textMplus output files for data examples presented in
Geiser, C., Hintz, F. A., Burns, G. L., & Servera, M. (in press). Multitrait-multimethod-multioccasion modeling of personality data. In J. F. Rauthmann (Ed.), Handbook of personality dynamics and processes. Elsevier
Novel multilocus sequence typing scheme reveals high genetic diversity of human pathogenic members of the Fusarium incarnatum-F. equiseti and F. chlamydosporum species complexes within the United States
No full textSpecies limits within the clinically important Fusarium incarnatum-F. equiseti and F. chlamydosporum species complexes (FIESC and FCSC, respectively) were investigated using multilocus DNA sequence data. Maximum-parsimony and maximum-likelihood analyses of aligned DNA sequences from four loci resolved 28 species within the FIESC, within which the species were evenly divided among two clades designated Incarnatum and Equiseti, and four species within the FCSC. Sequence data from a fifth locus, ß-tubulin, was excluded from the study due to the presence of highly divergent paralogs or xenologs. The multilocus haplotype nomenclature adopted in a previous study (K. O'Donnell, D. A. Sutton, A. Fothergill, D. McCarthy, M. G. Rinaldi, M. E. Brandt, N. Zhang, and D. M. Geiser, J. Clin. Microbiol. 46:2477-2490, 2008) was expanded to all of the species within the FIESC and FCSC to provide the first DNA sequence-based typing schemes for these fusaria, thereby facilitating future epidemiological investigations. Multilocus DNA typing identified sixty-two sequence types (STs) among 88 FIESC isolates and 20 STs among 26 FCSC isolates. This result corresponds to indices of discrimination of 0.985 and 0.966, respectively, for the FIESC and FCSC four-locus typing scheme using Simpson's index of discrimination. Lastly, four human and two veterinary isolates, received as members of the FIESC or FCSC, were resolved as five phylogenetically distinct species nested outside these species complexes. To our knowledge, these five species heretofore have not been reported to cause mycotic infections (i.e., F. armeniacum, F. brachygibbosum, F. flocciferum, and two unnamed Fusarium species within the F. tricinctum species complex
Lamellipalpus flavomarginatus Brancucci & Geiser, 2009, sp. nov.
No full textLamellipalpus flavomarginatus sp. nov. (Fig. 11) Type locality: India, Assam, Lushai Hills (today in Mizoram). Description. 3. Habitus: Oblong, testaceous with the elytra brown except for suture and the side which are narrowly yellow testaceous along the whole length. Underside completely testaceous. Head: Transverse, testaceous yellow; distance from eye to pronotum equal to 1.8 times diameter of eye. Interocular space very large, 3 times as large as eye diameter. Anterior margin of frons concave, straight on middle. Head slightly depressed on antero-median part. Surface shining, covered with fine punctures and very fine and long yellow setae. Mandibles long, evenly curved. Last segment of maxillary and labial palpi broad, 3.3 times as long as broad, flattened and strongly elongate, about 1 / 3 longer than mandibles, with fine pubescence; setae dense, fine and testaceous. Antennae short, flattened, 1 st and 3 rd joints elongate, 2 nd joint very small, 4 th– 11 th joints subequal and about 1.4 times as long as broad at the broadest point. Pronotum: Testaceous yellow, transverse, depressed posteriorly before angles. Sides rounded and convex. Posterior angles protruding and slightly obliquely carinate. Entire surface shining with small punctures, each with a long and very fine yellow seta. Scutellum broad, triangular and testaceous. Elytra: Brown, narrowly testaceous yellow along suture and outer margin, both of these along their whole length. Sides slightly dilated, broadest behind middle, with 3 distinct costae and coarsely punctured. Punctures strongly impressed, very large and much closer together than their own diameter, all individually visible. Pubescence dense; setae short, very fine and brown. Elytral margin distinctly bordered. Underside: Completely testaceous, finely and densely pubescent. Aedeagus: Small, lateral lobes thin and narrow, rounded posteriorly, ending in a sharp point dorsally. Median lobe with a sharp ridge dorsally. Female: Unknown. Measurements: TL: 7.6 mm; TL-H: 7.1 mm; HL: 1.2 mm; HW: 2.2 mm; LP: 2.2 Type material: Holotype 3 (NHMB): “Assam, Sairang, Lushai Hills / 29.9. 1960, 200/ 500 ’, F. Schmid” “ Lamellipalpus nigripennis Pascoe, det. W. Wittmer” [white Wittmer-handwritten label]. “ Holotype Lamellipalpus flavomarginatus sp.n. Brancucci & Geiser 08” [red printed label]. Etymology: This species is characterized by brown elytra with a testaceous sutural and marginal seam. Affinities: This species is very easy to determine because of the peculiar colour, the flattened antennae, and the very slightly depressed head. Distribution: NE India (Mizoram).Published as part of Brancucci, Michel & Geiser, Michael, 2009, A revision of the genus Lamellipalpus Maulik, 1921 (Coleoptera, Lampyridae), pp. 1-20 in Zootaxa 2080 on pages 12-14, DOI: 10.5281/zenodo.18733
Geiser, Alma (Birth, 1905-08-01)
No full textAddress: McHenry Avenue3682/Pg. 88/1905/F W/U.S./U.S./L. Geiser, Mid.Original record filed in drawer labeled 'GATES-GEMM'
The Status ofTylocerus crassicornis(Dalman, 1823), Type Species ofTylocerusDalman, 1823 (Coleoptera: Cantharidae: Silinae)
No full textIvie, Michael A., Geiser, Michael F. (2014): The Status ofTylocerus crassicornis(Dalman, 1823), Type Species ofTylocerusDalman, 1823 (Coleoptera: Cantharidae: Silinae). The Coleopterists Bulletin 68 (1): 111-114, DOI: 10.1649/0010-065X-68.1.111, URL: http://dx.doi.org/10.1649/0010-065x-68.1.11
Discodon viridimontanum Biffi & Geiser 2022, sp. nov.
No full textDiscodon viridimontanum sp. nov. urn:lsid:zoobank.org:act: 07CD44CC-D82E-44B0-A547-97C1F392D997 Figs 4A, 6J, U, 7J, 8J, 9J, 10J, 13D–F, 15J Diagnosis Similar to D. vanini sp. nov. by the last antennomeres orangish (Fig. 4A), but differs by the antennae shorter with longitudinal lines on the antennomeres IX–XI (Fig. 6J, U), the pronotum with lateral margins not elevated (Figs 7J, 8J), by the elongate elytra (Fig. 4A), and by the shape of ventrite VII of males (Fig. 10J) and the aedeagus (Fig. 13D–F). The single known male specimen of D. viridimontanum sp. nov. was fixed with an everted internal sac, which exacerbates the morphological comparison with other species. Etymology The specific epithet viridimontanum refers to the type locality of the species, Monte Verde (Minas Gerais state, Brazil), which translates to ‘green hill’ from Portuguese. Type material Holotype BRAZIL • ♂; Minas Gerais, Monte Verde; 22 Feb. 1960; J. Halik leg.; MZSP 46483 (Fig 4A). Paratype BRAZIL • 1 ♀; same collection data as for holotype; 2 Feb. 1970; MZSP 46484. Description Body length: 10.4 mm. Coloration (Fig. 4A): head pitch black, lustrous, except in lateral corners of clypeus, light brown; mandibles light brown, darker at base and tip; maxillary and labial palpi dark brown to black, light brown at apex of last palpomeres; antennae black, except antennomeres IX–XI and apex of VIII, orangish. Pronotum (Figs 7J, 8J) lustrous, partly translucent, with broad irregular black band from anterior to posterior margin, wider anteriorly and near posterior margin, and narrower near anterior half; background pale yellow with barely diffuse orange patches. Scutellum and elytra pitch black, slightly lustrous; at mid-length of each elytron, rounded whitish spot nearly reaching lateral borders but not meeting at suture. Thorax, legs and abdomen dark brown to black, tarsal claws brown. Male (Fig. 4A) Head short, nearly as long as wide, excluding eyes; integument smooth, densely covered with short and fine yellow setae; frons short, vertex flat, occipital region convex, broadly rounded behind eyes. Clypeus flat, anterior margin emarginate, slightly projected anteriorly with median incision. Eyes large, rounded, prominent. Mandibles falciform, acute, without accessory teeth. Last maxillary and labial palpomeres securiform. Antennae (Fig. 6J) short, slightly flattened dorsoventrally; antennomeres III– IX narrowing proximally, sub-serrate; antennomeres IX–XI with longitudinal lines dorsally. Pronotum (Fig. 7J) wide, about 1.4 times as wide as long; anterior margin and anterior angles arched; lateral margins slightly sinuate, with shallow notch at posterior third; anterior, posterior and lateral margins not elevated; integument smooth, densely covered with very fine yellow setae. Elytra very long, each elytron 5.7 times as long as wide, almost parallel; integument coriaceous, densely covered with short and fine decumbent setae, and much longer thick erect setae. Legs slender, densely pubescent, covered with long and thick setae; tarsi flattened dorsoventrally, fourth tarsomere with a transversal slit at base; anterior prothoracic tarsal claws (Fig. 9J) broadly lobed basally, lobe with very broad rounded margin; posterior claws on meso- and metathoracic tarsal claws apparently split at apex, with fine protruding tooth slightly shorter than claws. Abdomen weakly sclerotised, coriaceous, densely covered with long setae; ventrite VI notched at posterior margin; ventrite VII (Fig. 10J) with triangular lobes, inner margins nearly parallel, outer margins convergent posteriorly, apical margins rounded, with tip directed internally. Aedeagus (Fig. 13D–F): ventral wall of tegmen elongate, lateral margins convergent from apical third; apex forming a pair of short, rounded lobes with central acute tip curved ventrally; fringe of long setae along the lateral margins of tegmen dorsally; parameres very short, hidden between tegmen and median lobe; median lobe membranous, with numerous spine-like sclerites and tufts of thick pubescence. Female Similar to male; antennae (Fig. 6U) shorter; pronotum (Fig. 8J) wider, 1.5 times as wide as long, lateral margins sinuate, without notches; tarsal claws without basal lobe or apical slit; ventrite VII (Fig. 15J) with distal margin broadly arched, without projections or notches. Distribution Brazil (Minas Gerais state) (Fig. 16).Published as part of Biffi, Gabriel & Geiser, Michael, 2022, A revision of Discodon tricolor (Guérin-Méneville) and its mimics from the Atlantic forests of Brazil (Coleoptera: Cantharidae), pp. 148-189 in European Journal of Taxonomy 834 (1) on pages 173-176, DOI: 10.5852/ejt.2022.834.1907, http://zenodo.org/record/701767
Phylogenetic diversity of insecticolous fusaria inferred from multilocus DNA sequence data and their molecular identification via FUSARIUM-ID and Fusarium MLST
No full textWe constructed several multilocus DNA sequence datasets to assess the phylogenetic diversity of insecticolous fusaria, especially focusing on those housed at the Agricultural Research Service Collection of Entomopathogenic Fungi (ARSEF), and to aid molecular identifications of unknowns via the FUSARIUM-ID and Fusarium MLST online databases and analysis packages. Analyses of a 190-taxon, two-locus dataset, which included 159 isolates from insects, indicated that: (i) insect-associated fusaria were nested within 10 species complexes spanning the phylogenetic breadth of Fusarium, (ii) novel, putatively unnamed insecticolous species were nested within 8/10 species complexes and (iii) Latin binomials could be applied with confidence to only 18/58 phylogenetically distinct fusaria associated with pest insects. Phylogenetic analyses of an 82-taxon, three-locus dataset nearly fully resolved evolutionary relationships among the 10 clades containing insecticolous fusaria. Multilocus typing of isolates within four species complexes identified surprisingly high genetic diversity in that 63/65 of the fusaria typed represented newly discovered haplotypes. The DNA sequence data, together with corrected ABI sequence chromatograms and alignments, have been uploaded to the following websites dedicated to identifying fusaria: FUSARIUM-ID (http://isolate.fusariumdb.org) a
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