775 research outputs found
Capability to detect and localize typical defects of laser powder bed fusion (L-PBF) process: an experimental investigation with different non-destructive techniques
No full textAdditive manufacturing (AM) technologies, generally called 3D printing, are widely used because their use provides a high added value in manufacturing complex-shaped components and objects. Defects may occur within the components at different time of manufacturing, and in this regard, non-destructive techniques (NDT) represent a key tool for the quality control of AM components in many industrial fields, such as aerospace, oil and gas, and power industries. In this work, the capability of active thermography and eddy current techniques to detect real imposed defects that are representative of the laser powder bed fusion process has been investigated. A 3D complex shape of defects was revealed by a μCT investigation used as reference results for the other NDT methods. The study was focused on two different types of defects: porosities generated in keyhole mode as well as in lack of fusion mode. Different thermographic and eddy current measurements were carried out on AM samples, providing the capability to detect volumetric irregularly shaped defects using non-destructive methods
Gerhart Pohl and Hauptmann, ... Carl Hauptmann
No full textThe following text presents a little‑known fact from the history of Silesian‑German literature: the relationship between the writers Gerhart Pohl and Carl Hauptmann. Pohl (1902–1966) – first and foremost a prose writer, but also a playwright, publisher, reader, columnist and prominent member of writers’ associations – is known in literary circles primarily as an acquaintance, biographer and a kind of “guardian of memory” of the other Hauptmann brother, the Nobel Prize winner Gerhart. A closer examination of the sources, however, reveals Carl Hauptmann’s significant role in Pohl’s literary legacy and biography, as well as the great esteem in which Pohl held Carl Hauptmann. Firstly – Gerhart Pohl mentions the novel “Einhart der Lächler” as one of the main inspirations for taking the literary path. Secondly – Pohl’s first meeting with Carl Hauptmann takes place more than a decade earlier than Pohl’s meeting with Gerhart Hauptmann. Finally – Pohl considers Carl Hauptmann to be a precursor of Expressionism, as well as the author of the greatest German‑language book of the Rübezahl. The source material for the following analysis are Gerhart Pohl’s texts about Carl Hauptmann from his journalistic and occasional texts and essays
Luehea microphylla Pohl 1833
No full text<p> <i>Luehea microphylla</i> Pohl (1833: 129).</p> <p> Type:— BRAZIL. Minas Gerais: Minas Novas, “Habitat inter arbores ad margines fluviorum ad Rio S.Francisco, Capitanae Minas Novas. Legi florentem mense Octobri 1819”, <i>Pohl s.n.</i> (lectotype [as ‘holotype’], first-step designated by Cunha (1985: 10); <b>second-step lectotype, designated here</b>, W! [W0071087]). Minas Gerais: Minas Novas, <i>Pohl s.n.</i> (syntype remaining W! [W0071386]). [= <i>Luehea candicans</i> Mart.]</p> <p> Pohl’s original collection is kept in W where he worked and lived (Stafleu & Cowan 1976 –1988: 315), and where we found only two specimens reported by the author to the name <i>L. microphylla</i> and collected by him in Brazil (B. Wallnöfer, pers. comm.). These two specimens are syntypes of <i>L. microphylla</i>, and the previous typification of Cunha (1985) needs to be corrected (Art. 9.2 of the ICN), since it represents the first-step lectotype of <i>L. microphylla</i> and now requires the second-step typification by the way of subsequent lectotypification (Art. 9.17 of the ICN). For this reason, we designated herein the specimen <i>Pohl s.n.</i> (W0071087) the second-step lectotype of <i>L. microphylla</i>, that agree well with the morphological description presented in the protologue. Based on the type materials, the application of the name <i>L. microphylla</i> Pohl is confirmed as a heterotypic synonym of <i>L. candicans,</i> as previously accepted by Cunha (1985).</p>Published as part of <i>Gerace, Samuele, Bovini, Massimo G., Peruzzi, Lorenzo & Baumgratz, José Fernando A., 2022, Typification of names in the neotropical genus Luehea (Malvaceae: Grewioideae), pp. 180-188 in Phytotaxa 542 (2)</i> on pages 183-184, DOI: 10.11646/phytotaxa.542.2.5, <a href="http://zenodo.org/record/6415980">http://zenodo.org/record/6415980</a>
Illustration 63: Zeitschrift für die Buchillustration: Heft 1/1974
No full textThis is one of two unusual finds in a lovely Berlin used bookshop. I did not know of the magazine Illustration 63. Antiquariat Ihring had several copies, and I looked through them. Not surprisingly, there were many fables represented in the good artworks reproduced in the issues. I found two especially nicely done and took them along. Each issue of the magazine includes a set of Beilagen, individual pieces printed on their own and included inside the back cover. This issue includes two Beilagen that offer fables. Benno Huth's smaller two-colored linocut presents Canum legati ad Iovem, the dogs sent to Iove. It is a funny illustration. Alfred Pohl presents in larger format a woodcut representing Iriarte's version of Aesop's Two Goats. As might be expected, it is a dynamic illustration. What I seem to be learning from Wikipedia and German Google is that the magazine died after seventy-nine issues.Language note: German#709La Fontain
Antonia ovata Pohl var. excelsa Paula ex Paula (Loganiaceae)
No full textNeste trabalho são considerados os aspectos morfológicos externo e palinológico de três variedades de Antonia ovata Pohl, ocorrentes na floresta da região do rio Jari (Estado do Pará) e nos cerrados da Amazônia e do Planalto Central brasileiro.In this paper the author studies extern morphological and palinological aspects of the three varieties of the Antonia ovata Pohl: var. ovata, var. pilosa and var. excelsa. The var. excelsa from the woods of region of Jari river (Amazonia), and the var. ovata and var. pilosa from "cerrado" of Amazonia, and Central Brazil. Pollen grains of the two varieties excelsa and ovata present polymorphism. The identification of the three varieties is based on the following characteristics: presence or lack of hairs on the leaves and branches; height and diameter of the specimens; and, finally, the habitat
Time course of the effect of a bolus dose of intrathecal baclofen on severe cerebral spasticity
No full textContinuous intrathecal administration of baclofen with implanted programmable pump systems is recommended in the treatment of severe spasticity of cerebral origin. Prior to pump implantation, a baclofen bolus test (BBT) is used to assess the effectiveness of intrathecal baclofen using clinical scales such as the Modified Ashworth Scale (MAS). In the literature, the time and period of maximum effect of a bolus dose of intrathecally administered baclofen in patients with cerebral spasticity is variously reported. The aim of the study was, therefore, to reveal the time course of the effect of a BBT on severe cerebral spasticity by the use of a recently described spasticity measurement method. Spasticity in knee joints of 13 patients with severe cerebral spasticity was repeatedly assessed using the MAS and also continuously recorded by the measurement of force under circular fibreglass casts. Force was recorded as net-torque by multiplying the force by the distance between sensor and joint axis, thus allowing inter-individual comparison. Half-hour time integrals (TI) of net-torque were determined 9 hours before and 22 hours after intrathecal baclofen administration. Post-BBT half-hour time integrals (TI+0, TI+0.5, to TI+22) were compared with the mean of 17 pre-BBT half-hour time integrals ((TI) over bar (-9 to-1)). Significantly lower post-BBT half-hour time integrals compared with (TI) over bar (-9 to -1) were found between TI+2 and TI+8 (Dunnett adjusted p < 0.05). The median lowest TI after BBT of the 13 patients was TI+4. The lowest mean MAS scores were found 4 hours after BBT. The findings suggest that the greatest effect of BBT on cerebral spasticity occurs between 2 and 8.5 hours, with a maximal effect at 4 hours after intrathecal baclofen injection. Clinical scales used to determine the effect of BBT should thus be carried out during this period - ideally at 4 hours after baclofen injection
Final Statement of the Accused Oswald Pohl Stated Before the Military Tribunal
No full textTypewritten pages with Oswald Pohl\u27s unrepentant final statement.
Information Provided by Michael D. Bulmash:
Oswald Pohl (1892-1951). Pohl was the head of the Economic Office of the SS and ultimate overseer of the concentration camp system. He was responsible for turning his victims\u27 gold teeth, eyeglasses, hair, etc. into cash for the SS, using the Max Heliger Swiss accounts. He was captured by British troops in 1946 and sentenced to death by an American military tribunal for crimes against humanity, as well as war crimes, mass murder, and crimes committed in the concentration camps. Despite repeated appeals, he was executed in 1951. This document is from Nuremberg, October 1948, in German, entitled Final Statement of the Accused Oswald Pohl Stated Before the Military Tribunal... At the top of the first page he writes in blue ink: (M)eine (L)ieben... in thankfulness. Nuremberg Justice Prison June 46-October 48. He pens two paragraphs from a poem by Rainer Maria Rilke: What our spirit of confusion reclaims/Will eventually benefit the living/Even if it is sometimes just our thoughts/They dissolve in that great blood... Unrepentant, Pohl claims in his statement: ... I studied the essays that Henry Ford had published in the newspaper The Dearborn Independent in the years 1924/26 and as a book entitled The International Jew ... It is this attitude that great practical American who was not an anti-Semite had then impressed upon me and strengthened my belief that racial and the Jewish problem were not only gray theories. On the basis of this knowledge, and given the increasingly obvious phenomena in Germany, I became convinced that the influence of Judaism was disproportionate to its population and therefore, that containment is necessary. I considered such by legislative methods possible and also sufficient... I have therefore never been involved in acts of violence against Jews, nor endorsed this or knowingly promoted them. On the legislative measures of any kind I was also not involved... I am not conscious of having committed a crime... In another document he traces his ancestry back several generations.https://digital.kenyon.edu/bulmash/1258/thumbnail.jp
Toxicological profile for sulfur dioxide : (update)
No full textPrepared by Research Triangle Institute under Contract No. 205-93-0606 to the U.S. Dept. of Health and Human Services, Public Health Service, Agency for Toxic Substances and Disease Registry.Chemical manager(s)/author(s): Hana Pohl, ATSDR, Division of Toxicology, Atlanta, GA; John Liccione, Annette Iannucci, Sciences International, Inc., Alexandria, VA.Includes bibliographical references (p. 147-182).205-93-060
Odd and even Maass cusp forms for Hecke triangle groups, and the billiard flow
No full textBy a transfer operator approach to Maass cusp forms and the Selberg zeta function for cofinite Hecke triangle groups, Moller and the present author found a factorization of the Selberg zeta function into a product of Fredholm determinants of transfer-operator-like families: Z(s) = det(1 - L-s(+)) det(1 - L-s(-)). In this article we show that the operator families L-s(+/-) arise as families of transfer operators for the triangle groups underlying the Hecke triangle groups, and that for s is an element of C, Res = 1/2, the operator L-s(+) (respectively L-s(-)) has a 1-eigenfunction if and only if there exists an even (respectively odd) Maass cusp form with eigenvalue s(1 - s). For non-arithmetic Hecke triangle groups, this result provides a new formulation of the Phillips-Sarnak conjecture on non-existence of even Maass cusp forms.Volkswagen Foundatio
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