2,714 research outputs found
Winkelmann & Bohne, Inc., Brenham, Tex.
No full textRecto: [inscribed on negative] The Store That Appreciates Your Trade Winkelmann & Bohne, Inc. Brenham Tex. C. G. Botts - President, J. L. Koska - Sec & Treas., D. C. Giddings - Vice Pres. Verso: [postmarked] Brenham Tex. 15 [imprinted note and address not transcribed]
Money Illusion Under Test
No full textMuch progress has been made in recent years in developing and applying a direct measure of utility using survey questions on satisfaction with income and with life in general. In this paper we apply this new type of measurement to the study of money illusion. Using data from the German Socio-Economic Panel for the years 1993 to 2003, we cannot reject the hypothesis of no money illusion.North-South, cost-of-living, subjective well-being, fixed effects
Subscription-Based Inventory Planning for E-Grocery Retailing
No full textWinkelmann D, Köhler C. Subscription-Based Inventory Planning for E-Grocery Retailing. arXiv:2404.04097. 2024
Diffraction of backscattered electrons at crystal surfaces
No full textElectron backscatter diffraction (EBSD) has developed into a valuable tool for the analysis of materials in the scanning electron microscope (SEM) [1]. Pronounced improvements in applications of the EBSD method can be expected if it is possible to gain access to a quantitative description of not only the total number of backscattered electrons, but also to the fine-scale angular variations observed as diffraction patterns of these electrons. A complete simulation of the observed intensities, however, is only possible by applying electron diffraction theories that can properly include the multiple (dynamical) scattering of keV electrons in crystals [2,3].
I will discuss the application of many-beam dynamical theory to the simulation of experimental diffraction patterns of backscattered electrons. By energy-resolved measurements, the correlation between the energy loss of the scattered electrons and their diffraction effects can be investigated. First experimental results of corresponding angle-resolved reflection electron energy loss measurements are presented [4]. It is shown that under certain conditions, inelastically backscattered electrons can show more pronounced diffraction effects than the elastic electrons.
1. A.J. Schwartz, M. Kumar, B.L. Adams, D. P. Field (Eds.), Electron Backscatter Diffraction in Materials Science, 2nd edition, Springer, Berlin, 2009
2. A. Winkelmann, C. Trager-Cowan, F. Sweeney, A. P. Day, P. Parbrook, Ultramicroscopy 107, 414 (2007)
3. A. Winkelmann, Ultramicroscopy 108, 1546 (2008)
4. M. R. Went, A. Winkelmann, M. Vos, Ultramicroscopy 109, 1211 (2009
On a quaternionic Picard theorem
No full textThe classical theorem of Picard states that a non-constant holomorphic
function can avoid at most one value.
We investigate how many values a
non-constant slice regular function of a quaternionic variable
may avoid
Do Betting Markets Sense a Goal Coming? Evidence from the German Bundesliga
No full textWinkelmann D, Deutscher C. Do Betting Markets Sense a Goal Coming? Evidence from the German Bundesliga. arXiv:2505.21275. 2025
The Harmonicity of Slice Regular Functions
No full textIn this article we investigate harmonicity, Laplacians, mean value theorems and related topics in the context of quaternionic analysis. We observe that a Mean Value Formula for slice regular functions holds true and it
is a consequence of the well known Representation Formula for slice regular
functions over H. Motivated by this observation, we have constructed three
order-two differential operators in the kernel of which slice regular functions
are, answering positively to the question: is a slice regular function over H
(analogous to an holomorphic function over C) ”harmonic” in some sense, i.e.
is it in the kernel of some order-two differential operator over H?
Finally, some applications are deduced, such as a Poisson Formula for slice
regular functions over H and a Jensen’s Formula for semi-regular ones
Predicting Qualification Thresholds in UEFA's incomplete round-robin tournaments via a Dixon and Coles Model
No full textWinkelmann D, Michels R, Deutscher C. Predicting Qualification Thresholds in UEFA's incomplete round-robin tournaments via a Dixon and Coles Model. arXiv:2508.20075. 2025
Zullobalanus santamariaensis Buckeridge & Winkelmann, sp. nov.
No full text<i>Zullobalanus santamariaensis</i> Buckeridge & Winkelmann sp. nov. <p>(Figures 2–3)</p> <p> <b>Diagnosis.</b> <i>Zullobalanus</i> with shell lacking external apico-basal ribbing; tergum only weakly reflexed apically, but possessing extensive, well-formed crests for depressor muscle attachment; scutum with moderately produced articular ridge and moderate to weak adductor muscle scar.</p> <p> <b>Distribution and age.</b> Azores; Late Miocene – Early Pliocene.</p> <p> <b>Type material.</b> Holotype containing 2 sample compositions: DBUA-F 536.1, complete shell (3.23 mm in height and 3.39 mm in basal diameter), carina (5.44 mm in height), carinolatus, (5.36 mm in height), latus (1.84 mm in height), rostrum (2.59 mm in height), scutum (2.50 mm in articular margin), tergum (3.44 mm in articular margin); DBUA-F 536.2, complete shell (6.31 mm in height and 6.63 mm in basal diameter), carina (4.89 mm in height), carinolatus, (4.79 mm in height), latus (3.36 mm in height), rostrum (2.30 mm in height), scutum (2.43 mm in articular margin), tergum (3.61 mm in articular margin); Santa Maria, Malbusca outcrop (25°4'7.04"W, 36°55'45.53"N [30 m asl]); S.P. Ávila & K. Winkelmann, 22–29 June 2008. Paratypes all with same locality, collectors and date as the holotype: Natural History Museum Berlin: MB.A 1733, MB.A 1734; Natural History Museum Vienna: NHMW 2010/0088/0001, NHMW 2010/0088/0002; Royal Belgian Institute of Natural Sciences Brussels: IRSNB 7255a–g, IRSNB 7256a–g; Natural History Museum London: NHM IC 549 – NHM IC 562; Muséum National d’Histoire Naturelle Paris: MNHN A32053, MNHN A32054.</p> <p> <b>Description.</b> Shell conic, height approximating basal diameter; exterior rough, longitudinal ribbing weak to absent, lateral growth lines weak; orifice rhomboidal (Fig. 2 A, B); interior with strong ribbing, with minor bifurcation of some ribs near basis; rib cross-section showing simple arborescent interlaminate structures (Fig. 2 B, C); sheath smooth, well developed, pendant, occupying up to 50% of height of inner surface; basis firmly interlocking with parietal ribs; radii moderately narrow, with oblique summits, growth lines parallel to basis crossed by fine growth striae parallel to alar abutment (Fig. 2 B); alae with marginal extensions, summits almost horizontal (Fig. 2 B).</p> <p>Scutum (Fig. 3 A, B) very weakly reflexed apically; exterior with strong transverse growth ribs crossed by weak apico-basal striae; interior with articular ridge moderately produced, slightly pendant basally; adductor ridge weak, broadly rounded; adductor muscle scar moderate to weak, pit for lateral depressor muscles well formed lacking any obvious muscle attachment crests. Tergum (Fig. 3 C, D) moderately elongate, spur wellformed, removed from basi-scutal angle by own width and extending beyond same angle by approximately its own width, furrow well-formed distally, externally with well spaced growth lines, in some areas (especially basally), fine apico-basal striae present; interior with longitudinal furrow on articular margin wide, open, shallow, smooth except for weak growth striae; articular ridge well-formed, concave towards articular margin; crests for depressor muscles well developed basally, extending as a zone of raised papillae nearer the apex; articular ridge gently curved to extend slightly beyond a broadly concave basal margin; apex with approximately 3–4 strong transverse growth lines in adults.</p> <p> <b>Occurence at Santa Maria Island.</b> All the Late-Miocene and Early-Pliocene outcrops studied in Santa Maria contained the endemic barnacle <i>Zullobalanus santamariaensis</i> <b>sp. nov.</b> Most specimens were found at Malbusca and at “Pedra-que-Pica” outcrops. The beds at “Pedra-que-Pica” contained some well preserved but rare barnacles with opercula cemented to diverse marine molluscs (e.g. <i>Gigantopecten latissimus</i> (Brocchi, 1814) and <i>Lopha plicatuloides</i> (Mayer, 1864)); the beds at Malbusca contained a number of loose opercula in a sandy matrix. At Cré outcrop, rare single walls as well as opercula were present. In the more lithified marine sediments of Figueiral and Ponta do Castelo, barnacle fragments were only observed on eroded surfaces. At Ponta dos Frades, a few barnacle fragments were found together with well preserved micro-molluscs on eroded bottom surfaces. Nevertheless, we detected fragments of <i>Zullobalanus santamariaensis</i> <b>sp. nov.</b> in every sampled Miocene/Pliocene outcrop.</p> <p> <b>Remarks and affinities.</b> There is an extensive archaeobalanid fauna known from western Europe (Carriol, 2008) and the eastern seaboard of North America (Zullo 1984; Zullo & Kite 1985; Zullo & Perreault 1989; Zullo & Portell 1991). Of these, species of <i>Actinobalanus</i> are distinguished from this taxon by their porous bases; <i>Hesperibalanus</i>, the terga of which lack the well-formed nodose papillae on the internal surface and the broad spur; <i>Solidobalanus</i> by the externally smooth compartments; and <i>Lophobalanus</i> by their very narrow radii.</p> <p> <i>Zullobalanus santamariaensis</i> <b>sp. nov.</b> differs from all other <i>Zullobalanus</i> species by a lack of clearly formed external ribbing on the shell. Although there are some weak “ribs” these are somewhat obscured by the generally rough surface of the shell. The weakly reflexed scutal apex is close to that seen in the Australian species <i>Zullobalanus australiae victoriae</i> (Buckeridge, 1983) and in most respects it is closest to this species. In addition to the lack of external ribbing, it differs from <i>Z. australiae victoriae</i> by the presence of numerous well-formed crests for depressor muscles on the tergum.</p> <p> The scutal articular ridge is often basally pendant in larger specimens of <i>Zullobalanus</i> species (Buckeridge 1983), and although this has not been clearly seen in the material available, we should be mindful that all larger scuta are isolated and since shell disarticulation, have been abraded, as such wearing away delicate extensions.</p> <p> <b>Etymology.</b> Geographic: Island of Santa Maria (noun in apposition).</p>Published as part of <i>Winkelmann, Kai, Buckeridge, John S., Costa, Ana Cristina, Dionísio, Maria Ana Manso, Medeiros, André, Cachão, Mário & Ávila, Sérgio P., 2010, Zullobalanus santamariaensis sp. nov., a new late Miocene barnacle species of the family Archaeobalanidae (Cirripedia: Thoracica), from the Azores, pp. 33-44 in Zootaxa 2680</i> on pages 36-39, DOI: <a href="http://zenodo.org/record/199324">10.5281/zenodo.199324</a>
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