2,916 research outputs found
Alwyne Watson interviewed by Alex Hatcher, 20 July 2015
No full textAlwyne Watson (AW) interviewed by Alex Hatcher (AH), 20 July 2015. AW talks about his time in Army service before moving to Braunstone as a Police Officer, describes role. Talks about housing in former Army camp and the later prefabricated homes. Recalls events that took place in Braunstone Park e.g. the Braunstone Carnival and County Show. AW talks about the differences between policing in the 1960s and present day, compares modern Braunstone to when he first worked there. Talks about his relationship with Braunstone School, moved to new premises twenty years ago. Story about land mine dropped in Braunstone Park during Second World War. AW mentions his research into the use of Braunstone Park during and after the war and provides some details from his research. Talks about the local response to the presence of the American Soldiers and the racial tensions between the Black and White Americans
Eulima ephamilla Watson 1883
No full textEulima ephamilla Watson, 1883 (Figure 5 A–E) Eulima ephamilla Watson, 1883: 116–117. Watson (1886: plate 35, figure 6a–c). Eulima (“ Liostraca ”) stenostoma auct. non Jeffreys, 1858: Dall (1889a: 126). Eulima (Leiostraca) rectiuscula Dall, 1890: 160 (in part). Melanella ephamilla (Watson, 1883): Lange-de-Morretes (1949: 82); Rios (1994: 103, plate 34, figure 426 [reproduced from original illustration]); Rios (2009: 191, figure 468 [reproduced from original illustration]). Balcis ephamilla (Watson, 1883): Rios (1975: 61, plate 16, figure 239 [reproduced from original illustration]); Rios (1985: 54, plate 20, figure 242 [reproduced from original illustration]). Type material. Lectotype (herein designated): NHMUK 1887.2.9.1589 (Figure 5A, B). Paralectotypes (herein designated): NMW 1955.158.11088 [2 dd] (Figure 5C), from type locality. Holotype of Eulima rectiuscula Dall, 1890: USNM 87343 (Figure 5D, E), USFC stn. 2668 (30°58′30″N 79°38′30″W, 538 m), coll. 05/v/1886. Type locality. Brazil: off Pernambuco, Challenger stn. 122. Material examined. Type material. Measurements. Lectotype NHMUK 1887.2.9.1589, ~10 whorls (protoconch broken), SL= 8.5 mm; BWL= 3.4 mm; AL= 2.1 mm; SW= 1.8 mm; AW= 1.2 mm. Paralectotype NMW 1955.158.11088, ~10 whorls (protoconch broken), SL= 6.3 mm; BWL= 2.7 mm; AL= 1.6 mm; SW= 1.4 mm; AW= 0.9 mm. Paralectotype NMW 1955.158.11088, ~10 whorls (apex and aperture broken), SL= 8.0; BWL= 3.3 mm; AL= 1.6 mm; SW= 1.7 mm; AW= 0.9 mm. Holotype of Eulima rectiuscula, USNM 87343, ~8 whorls (apex broken), SL= 9.6; BWL= 4.0 mm; AL= 2.4 mm; SW= 2.0 mm; AW= 1.3 mm. Remarks. The shell numbered NHMUK 1887.2.9.1589 (Figure 5A, B) is the figured specimen by Watson (1886: plate 35, figure 6a–c) and is here designated as the lectotype. There are two other shells from the type locality stored in the NMW (NMW 1955.158.11088), which are here considered as paralectotypes. Watson (1883: 116) cited that “the specimen is dead and discoloured”, which could indicate that he referred to a single shell. However, Watson (1883) did not designate holotypes in his descriptions, and as other shells from the same locality were found, we prefer to consider that all were originally syntypes. See discussion for the status of types in the NMW. Watson’s (1883) description is appropriate to the lectotype and there is no need for a redescription. We only add that there is no presence of an umbilical fissure as stated by him in describing a “very minute furrow” behind the inner lip. Eulima ephamilla presents the general shape typical of Eulima sensu stricto, with an elongated, conical shell of slowly increasing diameter, flat whorls, narrow and elongated aperture as the type species of the genus, E. glabra (da Costa, 1778) (Warén 1989). MolluscaBase Eds. (2020a) cited Eulima rectiuscula Dall, 1890, from Georgia, USA, as a junior synonym of E. ephamilla without discussion. The holotype of E. rectiuscula (Figure 5D, E), collected from the USFC stn. 2668 (vide original label), also has a broken protoconch, but the general outline and dimensions are indistinguishable from the holotype of E. ephamilla. When Dall (1890) described E. rectiuscula, he also referred to samples of this species from the Caloosahatchee, a Plio-Pleistocene formation in Florida (Allmon et al. 1996). These fossil specimens were later recognized as a distinct species described by Gardner & Aldrich (1919: 39, plate 2, figure 5), currently known as Eulima dalli. In addition to the differences pointed by Gardner & Aldrich (1919), we add that the outer lip of E. ephamilla is more retracted at the proximal area than that of E. dalli. Thus, we consider E. rectiuscula as a junior synonym of E. ephamilla and that E. dalli is a valid species known only from the Miocene and Pliocene (Olsson & Harbison 1953). Eulima ephamilla is known only from two localities distant from each other by more than 6,000 km. The general shape of Eulima ephamilla resembles E. incolor Bouchet & Warén, 1986 (Figure 5F, G), from deep waters off Spain, and E. psila Watson, 1883 (Figure 6 A–M), from the western Atlantic. However, E. ephamilla can be distinguished from E. incolor by the relatively bigger shell (holotype of E. ephamilla, 10 whorls, SL= 8.5 mm vs. holotype MNHN-IM-2000-5660 of E. incolor, 11 whorls, SL= 6.6 mm) and by the more elongated shape of the aperture. The aperture of both species is oblong but the ratio AW/AL in E. ephamilla and E. incolor is very different (0.69 and 0.48, respectively). Eulima ephamilla differs from E. psila by the outline of the outer lip, which protrudes in the former (Figure 5B, E) and is straight in the later (Figure 6I). Geographical distribution. USA: Florida (Dall 1890); Brazil: Pernambuco (Watson 1883). Bathymetric distribution. From 538 m to 640 m (Watson 1883; Dall 1890).Published as part of Souza, Leonardo Santos De, Pimenta, Alexandre Dias & Barros, José Carlos Nascimento De, 2021, Revision of the deep-sea Eulimidae (Gastropoda, Caenogastropoda) from off Northeast Brazil, pp. 451-504 in Zootaxa 4927 (4) on pages 460-462, DOI: 10.11646/zootaxa.4927.4.1, http://zenodo.org/record/454292
Influence of temperature and sliding speed on the subsurface microstructure evolution of EN AW-6060 under sticking friction conditions
No full textThis article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in AIP Conference Proceedings 1896, 140012 (2017) and may be found at https://doi.org/10.1063/1.5008168.The microstructure evolution of the friction boundary layer of the aluminum alloy EN AW-6060 was investigated. Sticking friction tests at different temperatures and sliding speeds were carried out. A severe deformation below the friction surface was observed by means of LOM and EBSD mapping. Thus, the thickness variation and the grain structure of the high deformation zone could be described. Fibrous structure was observed at 300 °C and 400 °C, while equiaxed grains with high misorientation angle (>15°) were generated at higher temperatures. Additionally, abnormal grain growth and coarse grains were detected at high sliding speeds (10 mm/s, 42 mm/s) at 450°C and 500 °C respectively
Eulima psila Watson 1883
No full textEulima psila Watson, 1883 (Figure 6 A–M) Eulima psila Watson, 1883: 112. Eulima psila: Watson (1886: 508, plate 35, figure 1a–c). Type material. Lectotype (herein designated): NHMUK 1887.2.9.1585 (Figure 6A). Type locality. Puerto Rico: North Culebra Island, off St. Thomas, Challenger stn. 24 (18°38′30″N 65°05′30″W, 713 m), coll. 25/iii/1873. Material examined. Type material; USA: Georgia: USFC stn. 2668: USNM 108031 [1 dd]; Florida: Eolis stn. 193: USNM 433355 [1 dd]; Eolis stn. 305: USNM 433360 [1 dd]; Eolis stn. 351: USNM 417633 [3 dd]; Eolis stn. 372: USNM 417532 [1 dd]; Eolis stn. 376: USNM 417541 [1 dd]; Eolis stn. 379: USNM 433085 [1 dd]; USFC stn. 2400 (28°41′N 86°07′W, 309 m), coll. 14/iii/1885: USNM 323841 [1 dd]. Barbados: St. James, Holetown (13°10′52″N 59°38′30″W), coll. F. Sander: ANSP 353545 [1 dd]. Brazil: Pernambuco: off Archipelago Fernando de Noronha, REVIZEE Nordeste (03°54′54″S 32°37′48″W), 12/x/2001: MNRJ 35203† [1 dd]; Espírito Santo: AMBES11 stn. B5: MNRJ 34490† [1 lv, destroyed for dissection]; Rio de Janeiro: REVIZEE-Central V stn. 52f (21°46′01″S 40°04′58″W, 450 m), coll. Supply Boat Astro Garoupa, 21/vii/2001: IBUFRJ 13301† [2 dd]; Campos Basin (23°16′43″S 40°59′51″W, 600 m), coll. 19/viii/2009: MNRJ 25613† [1 dd]; HAB16 stn. E5: MNRJ 16188† [1 dd]; MD55 stn. CB102 (23°07′S 42°04′W, 100 m), coll. RV Marion Dufresne, v/1987: MNRJ 25901† [2 dd]; Campos Basin (23°17′16″S 41°00′36″W, 1800 m), coll. RV Ocean Stalwart, 05/ii/2016: MNRJ 27968† [1 lv]; Cabo Frio VII stn. 6194 (24°03′36″S 44°07′36″W, 134 m), coll. RV Almirante Saldanha, 01/iv/1983: IBUFRJ 15233† [1 dd]; Campos Basin (800 m), coll. iv/2008: MNRJ 35855† [1 dd]; Santos Basin (24°11′52″S 43°15′18″W, 600 m), coll. 28/x/2002: MNRJ 35925† [3 dd]; S„o Paulo: REVIZEE Sul stn. 6678: MNRJ 28245† [4 lv]; REVIZEE Sul stn. 6657: MNRJ 28243† [1 lv]; REVIZEE Sul stn. 6656: MNRJ 28242† [2 lv]; Rio Grande do Sul: REVIZEE Sul stn. 6858: MORG 42540† [1 dd]; REVIZEE Sul stn. 6843: MORG 42448† [1 dd]; Off Rio Grande do Sul (153 m), coll. RV Atlântico Sul, v/1986: MORG 24716† [1 dd]; Off Rio Grande do Sul, stn. 1656 (33°17ʹS 50°34ʹW, 173 m), coll. RV Prof. Wladimir Besnard, 20/i/1972: MORG 17586† [1 dd]. Measurements. Lectotype NHMUK 1887.2.9.1585, 8 whorls, SL= 4.3 mm; BWL= 2.0 mm; AL= 1.4 mm; SW= 1.1 mm; AW= 0.6 mm. USNM 433360, 14 whorls, SL= 11.4 mm; BWL= 5.1 mm; AL= 3.4 mm; SW= 2.4 mm; AW= 1.5 mm. IBUFRJ 15233†, 12 whorls, SL= 8.0 mm; BWL= 3.6 mm; AL= 2.3 mm; SW= 1.6 mm; AW= 1.0 mm. MNRJ 27968†, 12 whorls, SL= 7.2 mm; BWL= 3.5 mm; AL= 2.3 mm; SW= 1.6 mm; AW= 1.0 mm. MNRJ 35203†, 11 whorls, SL= 6.6 mm; BWL= 3.3 mm; AL= 2.0 mm; SW= 1.3 mm; AW= 0.8 mm. Remarks. Two syntypes of the present species were found in the NHMUK and NMW; the shell from the former (NHMUK 1887.2.9.1585) is the figured specimen by Watson (1886: plate 35, figure 1a–c) and is here designated as the lectotype (Figure 6A) to clarify the name of the species. The shell from the NMW, also collected at Challenger stn. 24, is not conspecific and is probably an undescribed species of Eulima known only from this locality. The latter species will be treated latter with additional material from the Caribbean. This species has slightly convex teleoconch whorls, a relatively higher aperture occupying 70% of the body whorl (vs. ~60% in E. psila), a slightly protruding outer lip and a colorless larval shell (Figure 6N, O). The description of Watson (1883) is appropriate for the lectotype and there is no need for a redescription of the specimen. However, since the lectotype is a young specimen it is important to highlight some features of the shell based on the material examined here. Despite the differences in size of other specimens studied here, they fit perfectly with the dimensions of the protoconch (± 420 µm long, 320 µm wide) and the initial teleoconch whorls of the lectotype. They also share a brownish spiral band at the suture of the protoconch. Eulima psila reaches about 14 whorls, 11.4 mm long and 2.4 mm wide (Figure 6E); the body whorl occupies 45% of total length and the outer lip is consistently straight and orthocline in specimens at different ontogenetic stages (Figure 6G, I). The false suture occupies a small height of the whorl (1/10) and the incremental scars are weak and present at regular intervals (0.7 whorl apart). Fresh specimens usually present a faint, wide, brownish or yellowish spiral band in the last whorls (Figure 6B, C, E). The operculum is slender with faint growth lines. This species is rediscovered after more than a century. The species was found in several localities of the western Atlantic, from Florida, USA, to Rio Grande do Sul, South of Brazil. On the Northeast coast of Brazil only a single shell was examined (Figure 6D). The bathymetric range of Eulima psila is extensive; live specimens were collected at 60 m (MNRJ 28243†) and at 1800 m (MNRJ 27968†), but most of the empty shells were collected in depths of more than 100 m. All live collected specimens have eyes. Other species of Eulima present a wide bathymetric range, for example E. bilineata Alder, 1848, from the Northeast Atlantic and Mediterranean, which occurs from 50 to 900 m (Bouchet & Warén 1986: 320). Other deep water Eulima from the Atlantic with a similar shell morphology are Eulima incolor (Figure 5F, G) and E. grimaldii Bouchet & Warén, 1986 (Figure 6P, Q), both from the Northeast Atlantic. Eulima psila can be distinguished from E. incolor by the presence of a brownish spiral band at the protoconch (Figure 6K) and by reaching a higher number of whorls in the protoconch (3.5 vs. 2.0 in E. incolor) (Bouchet & Warén 1986). Eulima psila differs from E. grimaldii by the straighter outer lip (Figure 6I), which is more protruding in E. grimaldii (Figure 6Q) and by the relatively less convex whorls of the protoconch (see Bouchet & Warén 1986: figure 793 for comparison). Geographical distribution. USA: Florida (present study); Puerto Rico (Watson 1883); Brazil: Archipelago of Fernando de Noronha, Espírito Santo, Rio de Janeiro, S„o Paulo, Rio Grande do Sul (present study). Bathymetric distribution. From 60 m to 1800 m.Published as part of Souza, Leonardo Santos De, Pimenta, Alexandre Dias & Barros, José Carlos Nascimento De, 2021, Revision of the deep-sea Eulimidae (Gastropoda, Caenogastropoda) from off Northeast Brazil, pp. 451-504 in Zootaxa 4927 (4) on pages 462-464, DOI: 10.11646/zootaxa.4927.4.1, http://zenodo.org/record/454292
Author-Suggested, Weighted Citation Index: A Novel Approach for Determining the Contribution of Individual Researchers
No full textA novel scientometric index, named ‘author-suggested, weighted citation index’ (Aw-index) is proposed to indicate the scientific contribution of any individual researcher. For calculation of the Aw-index, it is suggested that during the submission of a scholarly article, the corresponding author would provide a statement, agreed upon by all the authors, containing weightage factors against each author of the article. The author who contributed more to the article would secure a higher weightage factor. The summation of the weightage factors of all the authors of an article should be unity. The citation points a researcher receives from a scholarly publication is the product of his/her weightage factor for that article and the total number of citations of the article. The Aw-index of any individual researcher is the summation of the citation points he/she receives for all his/her publications as an author. The Aw-index provides the opportunity to the group of authors of a multi-authored article to determine the quantum of partial citations to be attributed to each of them. Through an illustrative example, a comparison of the proposed index with the major scientometric indexes is presented to highlight the advantages of the Aw-index
Influence of Process Parameters on the Quality of Aluminium Alloy EN AW 7075 Using Selective Laser Melting (SLM)
No full textAbstractSelective laser melting (SLM) is an additive manufacturing process, forming the desired geometry by selective layer fusion of powder material. Unlike conventional manufacturing processes, highly complex parts can be manufactured with high accuracy and little post processing. Currently, different steel, aluminium, titanium and nickel-based alloys have been successfully processed; however, high strength aluminium alloy EN AW 7075 has not been processed with satisfying quality. The main focus of the investigation is to develop the SLM process for the wide used aluminium alloy EN AW 7075. Before process development, the gas-atomized powder material was characterized in terms of statistical distribution: size and shape. A wide range of process parameters were selected to optimize the process in terms of optimum volume density. The investigations resulted in a relative density of over 99%. However, all laser-melted parts exhibit hot cracks which typically appear in aluminium alloy EN AW 7075 during the welding process. Furthermore the influence of processing parameters on the chemical composition of the selected alloy was determined
Zhedanov's Algebra AW(3) and the Double Affine Hecke Algebra in the Rank One Case. II. The Spherical Subalgebra
No full textThis paper builds on the previous paper by the author, where a relationship between Zhedanov's algebra AW(3) and the double affine Hecke algebra (DAHA) corresponding to the Askey-Wilson polynomials was established. It is shown here that the spherical subalgebra of this DAHA is isomorphic to AW(3) with an additional relation that the Casimir operator equals an explicit constant. A similar result with q-shifted parameters holds for the antispherical subalgebra. Some theorems on centralizers and centers for the algebras under consideration will finally be proved as corollaries of the characterization of the spherical and antispherical subalgebra
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Extensions and amplifications of a traffic model of Aw and Rascle
No full textIn a recent paper [1] Aw and Rascle introduced a new model of traffic on a uni-directional highway. Here the author studies an extension of this model, one which accounts for drivers attempting to travel at their maximum allowable speed. The author looks at a Lagrangian reformulation of this problem; a formulation that leads to an effective computational algorithm for solving the resulting system. He also investigates approximation scheme introduced by Dafermos [5] for scalar conservation laws and demonstrates that this Dafermos scheme works well on this 2 x 2 system
Automating the determination of wave speed using the pu-loop method
No full textThe PU-loop (pressure-velocity loop) is a method for determining wave speed and relies on the linear relationship between the pressure and velocity in the absence of reflected waves. This linearity of the PU-loop during early systole, which is directly related to wave speed, has always been established by eye. This paper presents a new technique that establishes this linearity and thus determining wave speed online. Pressure and flow were measured in the ascending aorta of 11 anesthetised dogs. The slope of the PU-loop, indicating wave speed was determined by eye and by using the new technique. The difference between the slopes of the two methods is in the order of 3%. The new technique is convenient and allows for the online assessment of wave speed, which could be used as a bedside tool for the assessment of arterial compliance
P.21.AW
No full textThe natural world has many similarities to mankind. It is precious, ever-changing & able to adapt to every condition of life. 'Pharmacognosy' explores nature's medicine, using scientific resources to discover why nature is vital for mental healing & how it has played an important role in the development of modern psychiatric treatments
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