409 research outputs found
A versatile method for simulating pp -> ppe+e- and dp -> pne+e-p_spec reactions
No full textWe have developed a versatile software package for the simulation of di-electron production in pp and dp collisions at moderate beam kinetic energies (1-2GeV). Particular attention has been paid to incorporate different descriptions of the Dalitz decay Δ rightarrow Ne + e - via a common interface. In addition, suitable parameterizations for the virtual bremsstrahlung process NN rightarrow NNe + e - based on one-boson exchange models have been implemented. Such simulation tools with high flexibility of the framework are important for the interpretation of the di-electron data taken with the HADES spectrometer and demonstrates the wide applicability within the field of nuclear and hadronic physics
Letter from F. W. Dohrmann to John Muir, 1909 May 15.
No full textUNIVERSITY CLUBSAN FRANCISCO, May 15, 1909Mr. John Muir,Martinez, California.Dear Sir:-I have the pleasure of writing to inform you that, on recommendation of the Board of Directors, you were elected an honorary member of the University Club of this city, by the unanimous vote of all members present at the last annual meeting.Respectfully yours,[illegible]Secretary.04496https://scholarlycommons.pacific.edu/jmcl/31693/thumbnail.jp
Figure 4. Sarostegia oculata, skeleton. A-B in Systematics and spicule evolution in dictyonal sponges (Hexactinellida: Sceptrulophora) with description of two new species
No full textFigure 4. Sarostegia oculata, skeleton. A-B, sarules (A, scale bar = 30 Mm; B, scale bar = 50 Mm). C, dictyonal framework (scale bar = 150 Mm). D–E, discohexasters (scale bars = 10 Mm). F, oxyhexaster (scale bar = 10 Mm).Published as part of Dohrmann, Martin, Göcke, Christian, Janussen, Dorte, Reitner, Joachim, Lüter, Carsten & Wörheide, Gert, 2011, Systematics and spicule evolution in dictyonal sponges (Hexactinellida: Sceptrulophora) with description of two new species, pp. 1003-1025 in Zoological Journal of the Linnean Society 163 (4) on page 1010, DOI: 10.1111/j.1096-3642.2011.00753.x, http://zenodo.org/record/544243
Rhizophyta yapensis Shen & Dohrmann & Zhang & Lu & Wang 2019, gen. et sp. nov.
No full textRhizophyta yapensis gen. et sp. nov. (Figs. 1–4, Table 2) urn:lsid:zoobank.org:act: 2211A05A-53D7-4563-82DE-86BBBB1BB33B Material examined. Holotype: SIO-POR-083, SRSIO, Jiaolong HOV DY 38III, dive JL148, collected by Bo Lu, June 4, 2017, Yap Trench in the northwestern Pacific Ocean (8.0582°N, 137.5233°E), depth 4160 m, preserved in 95% ethanol. Paratype A: SIO-POR-075, SRSIO, Jiaolong HOV DY 37I, dive JL109, collected by Bo Lu, May 15, 2016, Yap Trench (9.90045°N, 138.3995°E), 4779 m, 95% ethanol. Paratype B: SIO-POR-084, SRSIO, Jiaolong HOV DY 38III, dive JL148, collected by Bo Lu, June 4, 2017, Yap Trench (8.0579°N, 137.5227°E), 4159 m, frozen at -20?. Paratype C: SIO-POR-085, SRSIO, Jiaolong HOV DY 38III, dive JL148, collected by Bo Lu, June 4, 2017, Yap Trench (8.0582°N, 137.5224°E), 4159 m, 95% ethanol. Description. The new species is presented by four fungus-like specimens with everted, laterally directed atrial cavity. The holotype (Fig. 1A1–A 3) has a disc-like main body borne on a long, thin, slightly curved peduncle. The basal part of the peduncle is solid and features root-like outgrowths (rhizophytous method of fixation). The specimen was collected intact, but the peduncle was intentionally broken for storage and shipping. Total length of this specimen is 284 mm, of which the main body is 29 mm high, the peduncle is 233 mm long, and the root-like structure is up to 22 mm long. The main body is hanging from the upper part of the peduncle to one side; it is 60× 37 mm in diameter and up to 30 mm thick. The peduncle is solid, not hollow. It varies in diameter from 4.0 mm just below the main body to 1.0 mm at its narrowest point in the upper third and enlarges to 5.0 mm near the base. The exhalant or atrial surface of the main body (Fig. 2A) is relatively smooth, with very fine lattices (Fig. 2B) of loose megascleres (Fig. 2C) covering the subatrial exhalant canal openings, which are up to 2 mm in diameter. The inhalant or dermal surface (Fig. 2D) is more transparent, with a conspicuous network of white strands of radiating choanosomal diactins surrounding large inhalant canals, which are easily visible through the overlying thin and quite regular lattices (Fig. 2E) of loose megascleres (Fig. 2F). A marginal fringe is not evident at the junction of dermal and atrial surfaces. Spicules of the body are entirely unfused. The entire length of the peduncle and the main roots at the base are covered by a veil of loose pentactins with proximal rays directed inside (Fig. 2 G–I). The thin lateral roots branching off from the main roots are smooth (Fig. 2G). The roots are solid and consist of diactins fused by short synapticulars (Fig. 2J). Color of the specimen in ethanol is white. Paratype A (Fig. 1B1–B 2) was collected broken with a tattered main body borne on a thin peduncle split into two pieces. It is 587 mm long, of which the main body is 46 mm high, the peduncle is 502 mm long, and the rootlike structure is up to 39 mm long. The peduncle varies in diameter from 2.8 mm just below the main body to 1.6 mm at its narrowest point and enlarges to 5.6 mm near the base. Color of the specimen is white in situ while yellowish brown after sampling due to mixing with sediment. A sea anemone (Relicanthus sp.) was attached to the peduncle in situ. Paratype B (Fig. 1C1–C 3) was sampled with its main body and a section of peduncle 119 mm long. The main body is 25 mm high and 44× 26 mm in diameter. The diameter of the peduncle is 1.9 mm just below the main body and 1.0 mm at its narrowest point. The specimen is colored light yellow by mixing with sediment. Paratype C (Fig. 1D1–D 3) was collected with its main body and a section of peduncle 161 mm long. The main body is 28 mm high, 54× 46 mm in diameter, and up to 21 mm thick; it was sampled intact but later cut in half. The diameter of the peduncle is 3.2 mm just below the main body and 1.5 mm at its narrowest point. Color of the specimen in ethanol is white. Spicules. Dermalia and atrialia are pinular hexactins (Fig. 3 A–C) and rare pentactins (Fig. 3 D–F). Choanosomal megascleres are hexactins and diactins (Fig. 3 H–I). Peduncle and root internal spicules are diactins fused by short synapticulars (Fig. 2J). Dermal spicules of the peduncle are pentactins (Fig. 2 H–I, Fig. 3J). Microscleres are toothed stellate discohexasters with flower-shaped (perianthic) tufts of secondary rays (Fig. 3G). Spicule dimensions are given in Table 2. ......continued on the next page Pinular dermal hexactins (Fig. 3A) have thorny pinular rays and entirely rough tangential and proximal rays, which are various in shape and size. The pinular ray is quite variable in shape with spindle-like or ovoid ends. It is 63.8–232.3 (131.7) µm long, the tangential rays are 147.5–220.0 (181.8) µm long, and the proximal ray is 72.4– 370.0 (158.8) µm long. The ratio of proximal ray length to tangential rays length ranges from 0.3 to 2.1 with an average of 0.9. There are 38% pinular hexactins with a relatively shorter proximal ray (1.4 times the length of tangential rays. Most dermal hexactins are regular with tangential rays of equal length. However, some (1%) have only one pair of tangential rays equal and one of the unequal tangential rays is similar to a pinular ray. Atrial hexactins (Fig. 3B) are similar to the dermal ones but have longer proximal rays. The pinular ray of atrial hexactins is 31.3–173.0 (128.0) µm long, the tangential rays are 133.3–230.0 (179.7) µm long, and the proximal ray is 106.0–571.0 (309.8) µm long. The ratio of proximal ray length to tangential rays length ranges from 0.6 to 2.7 with an average of 1.7. There are 12% hexactins with a relatively shorter proximal ray (~60% of tangential rays length), while 76% have it> 1.4 times the length of tangential rays. The hexactins in the transition of main body and peduncle (Fig. 3C) are smaller in size, but thicker in ray width relative to ray length. They have a longer proximal ray of which 68% is more than 1.4 times longer than the tangential ray. Their pinular rays are 45.5–97.5 (70.8) µm long, the tangential rays are 82.8–173.7 (118.9) µm long, and the proximal ray is 102.9–371.7 (182.0) µm long. Dermal and atrial pentactins are rare and have spined tangential and proximal rays and smooth axial crosses (Fig. 3 D–F). There are two kinds of pentactins differing in size both as dermalia and atrialia, of which the smaller one is quite rare (Fig. 3D). Moreover, among atrial pentactins there is another type with relatively longer proximal ray (Fig. 3E). The tangential rays of dermal pentactins in the main body are 45.9–287.3 (145.4) µm long and the proximal ray is 38.7–201.3 (97.2) µm long. Atrial pentactins are bigger than dermal pentactins with the tangential rays 90.0–207.5 (159.3) µm long and the proximal ray 66.7–181.6 (120.8) µm long. Dermal pentactins in the transition of main body and peduncle (Fig. 3F) have thicker and rougher rays, longer proximal rays with a length of 89.2–266.8 (159.2) µm, while relatively shorter tangential rays with a length of 60.0–139.1 (108.4) µm. A few dermal pentactins have missing or undeveloped rays and are irregular tetractins, stauractins or tauactins (not shown). Forty-two percent of choanosomal hexactins (Fig. 3H) have equal rays. Others have rays of unequal length: 44% have one ray relatively shorter than others and 14% have one pair of rays evidently longer than the other two equal pairs. The rays of choanosomal hexactins are on average 86.8–182.0 (137.1) µm long and 10.5–23.8 (19.5) µm wide. They all bear spines; ray tips are rough and abruptly pointed. Choanosomal diactins (Fig. 3I) are slightly curved, with a generally inconspicuous central swelling, and can be roughly classified into two types according to the shape of terminal ends: One type has rounded, occasionally inflated, and rough terminal ends with less rough or even smooth caps, and smooth center; the other has conically pointed terminal ends and spines scattered across the whole spicule. Choanosomal diactins are 536.98–5200.0 (1766.8) µm long and 3.71–13.5 (8.7) µm wide. Diactins of the peduncle and roots (Fig. 2J) are fused by short synapticulars to form a rigid framework; they are larger than the main body diactins and smooth or somewhat verrucous. Dermal spicules of the peduncle are pentactins forming a veil (Fig. 2 H–I, Fig. 3J). They have spines in the axial cross, spined tangential and proximal rays, less rough and tapered or rounded ends of tangential rays, and short proximal rays. The tangential rays are 268.3–670.0 (456.2) µm long and the proximal ray is 30.2–99.4 (60.9) µm long. Microscleres (Fig. 3G) are toothed, stellate, perianthic discohexasters. They have short primary rays bearing 6–9 secondary rays ending in small discs with 6–8 marginal teeth. The primary rays are thick and mainly smooth while the secondary rays are thin and rough. The discohexasters are 56.7–108.6 (82.6) µm in diameter, primary rays are 6.0–11.1 (7.7) µm long, secondary rays are 19.6–43.0 (31.9) µm long. The general spiculation of the holotype and paratypes is the same. However, some spicules differ in specific shapes. Choanosomal diactins of paratype A have rounded or conically pointed terminal ends with relatively smooth caps, and the shape of their centers varies with inconspicuous, one or two swellings (Fig. 4A). The discohexasters of paratype C have 9–14 terminal rays per primary ray with 9–13 marginal teeth per disc (Fig. 4 B– C). Etymology. The species name, yapensis, refers to the location of collection, the Yap Trench. Remarks. The slight differences in spiculation between the four specimens could indicate ongoing speciation within the new genus. However, we consider these differences, combined with the geographical proximity of the specimens, to be too minor to provide evidence of full formation of separate species or subspecies (see also molecular results below). Instead, we interpret them as regular intraspecific variation.Published as part of Shen, Chengcheng, Dohrmann, Martin, Zhang, Dongsheng, Lu, Bo & Wang, Chunsheng, 2019, A new glass sponge genus (Hexactinellida: Euplectellidae) from abyssal depth of the Yap Trench, northwestern Pacific Ocean, pp. 367-378 in Zootaxa 4567 (2) on pages 370-377, DOI: 10.11646/zootaxa.4567.2.9, http://zenodo.org/record/259503
Dohrmann, Pauline (Death, 1896-03-22)
No full textAddress: 2518 Kemper LaneAge at death: 1 Yr 1 Mos.379/Pg 32/1896/F W S/Cinti, Ohio/Dr. I. D. Jones/C. M. Epply/Walnut Hills Cem.Original record filed in drawer labeled 'DOERGER-DOOLEY'
Studien zur Altägyptischen Kultur Nr. 34 (2006) - Abstracts
No full textAbstracts der Artikel zu SAK 34 (2006). Die Autoren sind: M. Abdelrahiem, H. Beinlich, E. Bernhauer, N. Billing. S. Bojowald, A. Busch, M. Depauw, K. Dohrmann, M. von Falck, F. Förster, D. Franke, H. Goedicke, W. Grajetzki, K. Jansen-Winkeln, J. Kahl/M. el-Khadragy/U. Verhoeven with an appendix by U. Fauerbach, D. el Kahn, D. Klotz, C. Leitz, K. Lembke, E.-E. Morgan, R. Preys, J.F. Quack, U. Rumme
Doing it Right: Psychological Tests to Ensure the Quality of Scientific Visualization
No full textS.243-256This paper discusses a general scheme for determining the quality of scientific visualization systems. It presents psychological tests which have been performed in order to find quantitative relaationships for this scheme, and discusses why simple numerical relationships may be hard to find. Our work is motivated by research into interactive and immerxive scientific visualization which pose two opposing demands: maximum image quality at sufficient frame rates. We believe that these two factors are also crucial for many other applications, e.g., virtual reality. For this scheme, special focus is on the user's perception of the system. Three components of Visualization System Quality are identified: Data quality, image quality, and interaction quality. In order to migrate from a merely qualitative to a mor quantitative model, psychological tests were performed to measure the influence of frame rate and rendering mode on the perception of visualized threedimensional vector data. Results o f the tests are presented and general suggestions for good perceptual tests are made. We believe that the experience we gained will be of benefit to many who are interested in questions of visualization system theory
Molecular detection and spatial heterogeneity of dehalogenating bacterial populations from the aquifer of a TCE -contaminated field site
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