429 research outputs found
Parvimysis nuda Wittmann 2020, sp. nov.
No full textParvimysis nuda sp. nov. http://zoobank.org/ urn:lsid:zoobank.org:act: E37DAB99-BAA7-4A84-9316-E260FCD58C15 (Fig. 9) Parvi mysis bahamensis Brattegard, 1969: part of paratypes from station 37–67. Type material. Holotype, adult male with 2.1 mm body length (ZMBN reg. no. 73149), paratypes 164 ♀ ad. 2.2–3.0 mm, 241 ♂ ad. 1.5–2.8 mm, 92 subad., 153 imm., 59 juv. in vial, 1 ♀ ad. 2.6 mm, 1 ♂ ad. 2.3 mm on slides (ZMBN 73149), stn. 37–67 (6172), Bahamas, Eleuthera, Pelican Cay, outside James Cistern, 25°16’45’’N 76°20’20’’W, 7 m, sand and coral heads, Ockelmann detritus sledge, 22 April 1967, leg. Torleiv Brattegard. Non-types (in present definition). 4 ♀ ad. 2.3–2.6 mm, 1 ♂ ad. 2.3 mm (AMNH IZC 331513), originally la- beled as paratypes of P. bahamensis, from same sample as for the holotype of P. nuda sp. nov. Type locality. Known only from sublittoral marine waters of Bahamas, Eleuthera, Pelican Cay, 25°16‘45‘‘N 76°20‘20‘‘W. Derivatio nominis. The species name is a Latin adjective with female ending, referring to the naked (= smooth) margin of the telson cleft, in order to underline the difference from P. ornata where the cleft is lined by small laminae-denticles. Diagnosis. Parvimysis with obtuse-angled rostrum, tip broadly rounded. Freely projecting portion of the rostrum 0.3–0.4 times the length of the terminal segment of the antennular trunk. Antero-lateral edges of the carapace produced into a short acute process. Eyes moderately large; maximum diameter of cornea 1.7–2.0 times the length of the terminal segment of the antennular trunk in dorsal view. Antennular trunk slightly extending beyond trunk of antennal flagellum or ending at about same height. Apical segment of antennal scale extending about full length beyond trunk of antennal flagellum, basal segment not extending beyond antennular trunk. Cardiac portion of foregut with simple, smooth spines; additional stout, modified spines on lateralia, not so on dorso-lateral infolding. Mandibular palp with apical segment making up 14–17% of total palp length. Median segment subterminally with two basally barbed setae on inner margin; remaining portions of this segment smooth. Maxillary palp with proximal segment 0.3 times total palp length. Exopod of maxilla extends shortly beyond middle of the terminal segment of the palpus. Thoracic exopods 2–7 with 8–segmented flagellum. Endopods 1, 2 without claw; endopods 3–8 with moderately strong to slender, weakly curved claw. Length of claw 5 is 7–12 times its width at basis. Endopods 3–8 with oblique articulation between carpus and propodus. Carpus of endopod 5 with normal setation in both sexes. Oostegites normal. Exopod of fourth male pleopod 3-segmented, ending in large modified seta plus a minute lobe with minute seta (similar to Fig. 1N). Apical segment of exopod is 0.3–0.5 times the length of the median segment. Scutellum paracaudale triangular with narrowly to widely rounded tip. Telson short, length 3.6–4.7 times distance between the latero-terminal spines. Shape roughly trapezoid; lateral margins slightly sinusoid, tapering, each armed with 2–3 short spines; each lateral margin ending in latero-terminal lobe with apical spine, the latter longer than the lateral spines. Telson terminally emarginate by 11–26% its length; emargination proximally well rounded, showing smooth margins only. Description of types. All features of the diagnosis and those reported further above as common to the six Caribbean species of the present study. Size of adult males 1.5–2.8 mm (n = 242), females 2.2–3.0 mm (n = 164). Cephalic region (Fig. 9 A–F). Cornea dorsoventrally weakly compressed, calotte-shaped in dorsal, oviform in lateral view, length 1.4–1.7 times height in lateral view (Fig. 9B). Basal segment of antennular trunk about equal to combined median and apical segments in both sexes.Antennal scale with apical segment 27–31% length of the basal segment. Third segment of the trunk of the antennal flagellum with 74–80% length of the second segment. Apical segment of mandibular palp with two smooth setae, 4–6 modified setae bilaterally bearing series of stiff, spine-like barbs; and one longer seta with barbs along most of its distal 40–70%. Basal segment of maxillary palp with three barbed setae on inner margin, apical segment densely setose at tip and on terminal 30–50% of inner margin, whereas lined by small hairs in more proximal portions. Each half of the foregut with one large, apically pronged, serrated spine (Fig. 9E) on mid-posterior part of lateralia; this spine with total of 10–16 teeth, among which 2–4 large teeth at tip. Group of 3–4 centro-apically serrated spines in even more posterior position on lateralia; the largest, most proximal spine (Fig. 9F) with total of 10–15 small teeth distributed over apical 60–80% of spine length. Thorax (Figs 9C, G–L). Length increases from exopod 1 to (5–6) and decreases from 6 to 8; length of endopods increases from 1 to 8. Basal plate of thoracic exopods 1–8 well rounded. Flagellum 7-segmented in exopod 1 versus (8–7)-segmented in exopod 8. Thoracic endopod 8 slender; when stretched, extending forwards to the eyes or backwards to the end of pleonite 6. Dactylus of endopod 2 large, equipped with 6–7 modified setae (as in Fig. 4B) plus a few smooth setae, no spine-like setae. Length of claws increases in series of thoracic endopods 3–5, not clearly in more caudal endopods. Slenderness of claws not clearly different among endopods 3–8; claw 3 is 8–11 times its width at basis, this relationship 9–10 in claw 8. Penes terminally with 7–10 minute setae facing the ejaculatory opening. Pleon (Fig. 9 M–Q). Male pleopod 5 slender, 1.2–1.8 times length of pleopod 3. Male pleopod 4, when stretched, reaching to end of pleonite 5, its large apical seta ends at the middle of pleonite 6. Fourth endopod 0.8–1.1 times length of basal segment of exopod; endopod with 8–11 barbed setae. Uropods with endopod 0.9–1.0 times length of exopod or 1.4–1.7 times length of telson (without spines). Length of exopod 7–8 times maximum width. Telson length 1.3–1.7 times width at basis, or 0.5–0.6 times length of exopod of uropods, or 0.7–0.9 times pleonite 6.Published as part of Wittmann, Karl J., 2020, Revision of the genus Parvimysis (Mysida, Mysidae) with descriptions of five new species from coastal waters of the Caribbean, pp. 1-30 in Zootaxa 4742 (1) on pages 20-22, DOI: 10.11646/zootaxa.4742.1.1, http://zenodo.org/record/367435
Beck, Rose Marie & Frank Wittmann (eds.) 2004. African Media Cultures – Transdisciplinary Perspectives. Cultures de médias en Afrique. Perspectives transdisciplinaires - Topics in African Studies, Vol. 2, Köln: Köppe Verlag, 320 pages, 2 b/w photos, 17 tables, 15 graphs, €34,80
No full textBeck and Wittmann\u27s volume is a most welcome contribution about types and uses of traditional and modern media in Africa. Their volume is divided into fifteen chapters preceded by a comprehensive introduction and followed by some information about the author
Boreomysis bispinosa O. S. Tattersall 1955
No full text<i>Boreomysis bispinosa</i> O.S. Tattersall, 1955 <p> <b>Material examined</b> (non-types only) ANGOLA BASIN • 1 imm. (BL = 8.3 mm, eyes missing); 17°4.935′ S, 4°40.805′ E to 17°07.454′ S,</p> <p>4°42.276′ E; bottom depth 5460– 5460 m; 25 Jul. 2000; DIVA-1 exped., #344; epinet of epibenthic sledge; ZMH 58248 • 1 ♀ ad. (estimated BL = 12.6 mm, cephalothorax and exuvia); 16°16.989′ S, 5°27.279′ E to 16°19.280′ S, 5°27.205′ E; bottom depth 5430–5433 m; 28 Jul. 2000; DIVA-1 exped., #348; supranet of epibenthic sledge; ZMH 58249.</p> Type locality <p>Not stated by O.S. Tattersall (1955). On page 14 she indicated a “female type ” taken off Cape Town, depth 1350 – 1250 m, and a “male type ” NE of St. Helena, depth 1450 – 700 m. A rough estimate by the present author suggests that the stations are from 34° S, 17° E and 15° S, 5° W, respectively.</p> Distribution <p> Previously reported from the Atlantic Ocean and from the Atlantic sector of the Southern Ocean, 51° N– 54° S, 36° W– 17° E (O.S. Tattersall 1955; Mauchline & Murano 1977; Hargreaves 1997; Wittmann <i>et al.</i> 2004; Petryashov 2005 b; San Vicente 2011). The animals were sampled with benthic as well as pelagic gears. The here documented records in the SE-Atlantic at 16– 17° S, 5° E are within the already known geographical range, while the bathymetrical range of 700–4050 m is now extended down to 5430–5460 m (see also Discussion).</p>Published as part of <i>Wittmann, Karl J., 2020, Lophogastrida and Mysida (Crustacea) of the " DIVA- 1 " deep-sea expedition to the Angola Basin (SE-Atlantic), pp. 1-43 in European Journal of Taxonomy 628</i> on page 15, DOI: 10.5852/ejt.2020.628, <a href="http://zenodo.org/record/3756146">http://zenodo.org/record/3756146</a>
Design and Construction of Molten Salt Parabolic Trough HPS Project in Évora, Portugal
No full textIn the Portuguese city of Évora a parabolic salt loop is being constructed in order to demonstrate the viability of this system. Different partners have teamed-up for this task. Siemens takes the project lead in the German HPS consortium. The solar demonstration plant will be capable to produce high live steam parameters in an once-through steam generation system (SGS). The SGS is designed for 580 °C and 140 bar. The live steam parameters and the design of the SGS and the overall plant provide a highly flexible steam production.
Since the solar field needs to provide heat at higher temperatures than typical solar field set-ups and uses molten salt as heat transfer fluid, different adoptions have had to be made. Several of these adoptions are described in the paper. Furthermore the layout of the flexible connections consisting of hose and rotary must be re-designed. Targets of the developments are: both thermal expansion of the absorber pipe and rotation of SCA must be compensated for reasonable number of lifetime cylcles and the complete system must be designed in order to prevent any freezing of the salt within the component
Simulation of hydration and formation of structure in hardening cement-based materials
No full textCivil Engineering and Geoscience
The role of evolving niche choice in herbivore adaptation to host plants
No full textNabutanyi P, Edison A, Czuppon P, Xu S, Wittmann M. The role of evolving niche choice in herbivore adaptation to host plants. Journal of evolutionary biology. 2025;38(3):305-319.Individuals living in heterogeneous environments often choose microenvironments that provide benefits to their fitness. Theory predicts that such niche choice can promote rapid adaptation to novel environments and help maintain genetic diversity. An open question of large applied importance is how niche choice and niche choice evolution affect the evolution of insecticide resistance in phytophagous insects. We, therefore, developed an individual-based model based on phytophagous insects to examine the evolution of insecticide resistance and niche choice via oviposition preferences. To find biologically realistic parameter ranges, we performed an empirical literature survey on insecticide resistance in major agricultural pests and also conducted a density-dependent survival experiment using potato beetles. We find that, in comparison to a scenario where individuals randomly oviposit eggs on toxic or non-toxic plants, the evolution of niche choice generally leads to slower evolution of resistance and facilitates the coexistence of different phenotypes. Our simulations also reveal that recombination rate and dominance effects can influence the evolution of both niche choice and resistance. Thus, this study provides new insights into the effects of niche choice on resistance evolution and highlights the need for more studies on the genetic basis of resistance and choice. © The Author(s) 2024. Published by Oxford University Press on behalf of the European Society of Evolutionary Biology
Paramblyops rostratus Holt & Tattersall 1905
No full textParamblyops rostratus Holt & Tattersall, 1905 Material examined (non-types only) ANGOLA BASIN • 1 ♂ ad. (BL = 16 mm, in 2 parts); 22°19.978′ S, 3°18.342′ E to 22°20.249′ S, 3°18.439′ E; bottom depth 5179–5180 m; 9 Jul. 2000; DIVA-1 exped., #318; ZMH 58261 • 1 imm. (BL = 9.0 mm, in 2 parts), 1 juv. (BL = 6.5 mm); 16°16.989′ S, 5°27.279′ E to 16°19.280′ S, 5°27.205′ E; bottom depth 5430–5433 m; 28 Jul. 2000; DIVA-1 exped., #348; supranet of epibenthic sledge; ZMH 58259 • 2 ♀♀ imm. (BL = 6.5–8.3 mm); same collection data as for preceding; ZMH 58260 • 1 ♀ subad. (BL = 14.5 mm); 16°13.329′ S, 5°26.837′ E to 16°14.820′ S, 5°26.702′ E; bottom depth 5433–5434 m; 29 Jul. 2000; DIVA-1 exped., #350; supranet of epibenthic sledge; SMF 55191. Type locality Not stated by Holt & Tattersall (1905). Upon first description, they reported material from seven stations at the NE-Atlantic slope, depth 181̄382 fathoms (331̄699 m). A rough estimate by the present author suggests that the stations are in the range of 50– 54° N, 10– 13° W. Distribution Previously reported from the North Atlantic and Mediterranean, 34– 61° N, 72° W– 14° E, depth 200– 2900 m (Hansen 1908, 1927; W.M. Tattersall 1909, 1951; Colosi 1929; Lagardère 1972; Nouvel & Lagardère 1976; Mauchline 1986; Cartes & Sorbe 1995; Cartes et al. 2004; Vanquickelberghe 2004; Fanelli 2007; Petryashov 2009; San Vicente 2010, 2017; Sorbe & Elizalde 2013). Sorbe & Elizalde (2013) considered this species as part of the suprabenthic fauna. The here documented records in the SE- Atlantic at 16̄ 22° S, 3̄ 5° E, depth 5179̄ 5434 m, represent large extensions of the known geographical as well as bathymetrical ranges (see also Discussion). Statoliths Statoliths mineralized with fluorite; diameter 124 μm in the ♂ ad. 16 mm, vs 89 μm in the ♀ subad. 14.5 mm, and 62 μm in the imm. 9.0 mm (2 statoliths per specimen examined).Published as part of Wittmann, Karl J., 2020, Lophogastrida and Mysida (Crustacea) of the " DIVA- 1 " deep-sea expedition to the Angola Basin (SE-Atlantic), pp. 1-43 in European Journal of Taxonomy 628 on page 17, DOI: 10.5852/ejt.2020.628, http://zenodo.org/record/375614
Couples' sexual recovery after surgery for prostate cancer : the development of a conceptual model
No full textCOUPLES' SEXUAL RECOVERY AFTER SURGERY FOR PROSTATE CANCER: THE DEVELOPMENT OF A CONCEPTUAL MODEL.ByDaniela Wittmann The goal of this multiple-manuscript dissertation is to addresses a gap in the literature on couples' sexual recovery after surgery for prostate cancer in order to arrive at a testable conceptual model of couples' sexual recovery. The three manuscripts are independent in their research questions and methodologies, but are related in their exploratory nature and in their effort to examine different aspects of couples' sexual recovery. In Chapter I, the theoretical framework of the research is described and a preliminary model of couples' sexual recovery is proposed. It is a biopsychosocial model of sexuality, with grief as a process through which couples work on recovery. In Chapter II, a qualitative study describes couples' anticipation of the sexual recovery and their actual experience after surgery. The study findings support the theoretical framework in which couples experience the affect of the side-effects of prostate cancer surgery on the biopsychosocial aspects of sexuality and cope more or less successfully with the sexual losses through grief and mourning, which starts at diagnosis. Female partners' interest in sex, regardless of menopausal status of their sexual function, makes a contribution to the recovery. Chapter III presents the second study, also qualitative, and describes patients' and partners' view of the role of the partner in the sexual recovery. Men and partners have many common perceptions of the role, including the importance of the partner's interest in sex regardless of menopause. However, the men generally are not aware of partners' sexual needs and needs of support; partners are not certain about help-seeking. The third study, described in Chapter IV, is a quantitative study that uses validated measures to trace the change in patients' and partners' sexual function, sexual satisfaction, and dyadic satisfaction from before surgery to 18 months after surgery, on average. In spite of the patients' improving sexual function, sexual satisfaction of patients as well as partners decreased. Female partners' dyadic satisfaction appears to depend on the partner's sexual satisfaction and the couple's level of income. The author integrates the three studies' findings into extant research literature and, based on the findings of the dissertation research, proposes a conceptual model of couples' sexual recovery after surgery for prostate cancer that can be tested in confirmatory, hypothesis driven research.Thesis (Ph. D.)--Michigan State University. Social Work, 2013Includes bibliographical references (pages 134-142
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