117,383 research outputs found
Letheobia erythraea Scortecci
No full textLetheobia erythraea (Scortecci) (Fig 9 C) Eritrean gracile blind-snake Typhlos (sic) erythraeus Scortecci 1928, Atti Soc. Ital. Sci. Nat. Mus. Civ. Stor. Nat. Milano, 67: 291, Fig. 1. Type locality: Saganeiti, Eritrea (15 °04’N, 39 ° 12 ’E, elevation 2200 m), collected by Captain L. Fossati, holotype MSNM 3353 (ex-MSNM 2015). Rhinotyphlops somalicus – (not Boulenger) Roux-Estève 1974: 200 & 1975: 445 (part); Hahn 1980: 35 (part). Rhinotyphlops erythraeus – Largen 1978: 57, 1997: 86; Largen & Rasmussen 1993: 320; McDiarmid et al. 1999: 79; Franzen & Wallach 2002: 181; Wallach & Lanza 2004: 81. Description. Snout obtusely pointed in both dorsal and lateral profiles. Rostral cuneiform, broad below, terminating in a conical point, frontal subtrapezoid; supraoculat transverse, its lateral apex between preocular and ocular; eye invisible; nasal divided, inferior suture arising from second labial; ocular divided into subequal dorsal ocular and ventral subocular; SIP X (N 1, P, S, S); MSR 20, reduction A/B 4–6, B/C 0; MD 443– 462; L/D ratio 68–72; tail without a terminal spine. Brown above and gold below. Size. Largest specimen (NMW 16949 – Gheleb) 245 mm in total length. Habitat. Eritrean montane grassland and woodland. Distribution. Endemic to the Eritrean highlands, 1800–2200 m (Fig. 13). Localities. ERITREA. Gheleb NMW 16949; Saganeiti MSNM 3353 (holotype).Published as part of Wallach, Van, 2007, A review of East and Central African species of Letheobia Cope, revived from the synonymy of Rhinotyphlops Fitzinger, with descriptions of five new species (Serpentes: Typhlopidae), pp. 31-68 in Zootaxa 1515 on page 61, DOI: 10.5281/zenodo.17727
Leptotyphlops yemenicus Scortecci 1933
No full textLeptotyphlops yemenicus Scortecci (Plate 7, Fig. 4) Yemen worm snake Leptotyphlops yemenicus Scortecci, 1933, Atti. Soc. Ital. Sci. Nat. Mus. Civ. Stor. Nat. Milano 72: 165. Type locality Yemen, holotype MSNM 3354, collected 1933, donated by G. Franchini; Wallach & Lanza 2004: 86. Leptotyphlops nursii — Schmidt & Hoogstraal, 1951: 7; Schmidt, 1953: 259; Corkill & Cochrane, 1966: 496; Hahn, 1980: 23; Gasperetti, 1988: 202; McDiarmid et al, 1999: 39. Leptotyphlops blanfordi nursi — Hahn, 1978: 487. Leptotyphlops blanfordii nursii — Schätti & Gasperetti, 1994: 382; Schätti & Desvoignes, 1999: 78. Leptotyphlops nursi — Abadi, 1998: 101. Diagnosis. With 12 midtail rows, Leptotyphlops yemenicus appears allied to L. burii and L. nursii, but it differs in its low middorsal count and high subcaudal count, short tail with large thorn-like apical spine, narrow depressed head, short and narrow rostral, supranasal and ocular shapes, and semilunate cloacal shield. In addition, it differs from L. nursii in its smaller frontal size and lack of a slight beak. Skull with a large frontoparietal foramen like L. cairi. Description. Body cylindrical, with head narrower than neck, the long tail tapers slightly before a large thorn-like terminal spine. Snout rounded in dorsal view; lateral head profile depressed with rounded snout projecting with distinct preoral cavity but beak lacking in lateral view. Rostral sagittate, narrow (0.36 head width), not reaching eye level; supranasals larger and broader than rostral dorsally, extending well beyond posterior apex of rostral, nearly as broad as ocular in lateral view with strongly oblique and angled posterior border; interocular line centred between frontal and postfrontal shields. Behind rostral, upper lip bordered by infranasal (nostril nearer to supralabial than rostral along nasal suture), which is twice the height of anterior supralabial and equal in width to it along lip, short anterior supralabial, ocular that is broader than supranasal with a wide lower portion, upper third narrowed, barely wider than the large eye (with distinct pupil) beneath it, and moderate sub-triangular posterior supralabial. Supraoculars rounded, about as long as wide, anteriorly wedged between supranasal and ocular, posteriorly wedged between the slightly broader frontal and postfrontal, frontal narrower than postfrontal, which is narrower than interparietal. Parietals transverse, occipitals enlarged and fused, in contact with posterior supralabial. Temporal single. Cloacal shield semilunate. Scale rows 14-14-14, midtail rows 12; middorsals 287, subcaudals 42. Length/width ratio 70, relative tail length 11.5%, tail length/width ratio 9.55. Dorsum and venter uniformly light brown. Size. Total length of holotype 80.5 + 10.5 = 91 mm, midbody diameter 1.3 mm, midtail diameter 1.1 mm. Distribution. Known only from the holotype MSNM 3354 from Yemen, without precise locality.Published as part of Published, First, 2007, A revision of the genus Leptotyphlops in northeastern Africa and southwestern Arabia (Serpentes: Leptotyphlopidae), pp. 1-78 in Zootaxa 1408 on pages 22-24, DOI: 10.5281/zenodo.678906
Leptotyphlops erythraeus Scortecci
No full textLeptotyphlops erythraeus Scortecci (Plate 7. Fig. 2) Eritrean worm snake Glauconia cairi — Steindachner, 1900: 333 (Dahlak Island). Glauconia erythraea Scortecci, 1928, Atti. Soc. Ital. Sci. Nat., Milano, 67: 293, fig. 2. Type locality: Massaua [=Massawa], Eritrea (15°37’N, 39°28’E, near sea level), holotype MSNM 3349 (formerly MSNM 1916), collected by F. Fatigati. Leptotyphlops erythraeus — Parker, 1932a: 362; Hahn, 1980: 14; Trape, 2002: 49, fig. 10A; Wallach & Lanza 2004: 87. Leptotyphlops erythraea — Parker, 1949: 21. Leptotyphlop s sp. — Hoofien & Yaron, 1964: 38 (Entedebir Island). Leptotyphlops cf. macrorhynchus — Lanza, 1972: 174 (Awash National Park). Leptotyphlops macrorhynchus — Hahn, 1978: 482; Lanza, 1983: 220; Meirte, 1992: 15; Largen & Rasmussen, 1993: 324; Schleich et al., 1996: 476; Largen, 1997: 87; McDiarmid et al., 1999: 36. Leptotyphlops cairi — Largen & Rasmussen, 1993: 324 (part); Largen, 1997: 87 (part). Leptotyphlops nigricans — Largen & Rasmussen, 1993: 325 (part). Leptotyphlops macrorhynchus macrorhynchus — Hahn & Wallach, 1998: 54. Diagnosis. Close to Leptotyphlops nursii, but differs in having a more pronounced beak (extending below lip level), fewer subcaudals (perhaps without sexual dimorphism) and perhaps smaller maximum size (170 mm vs. 242 mm). Skull with a large frontoparietal foramen like L. cairi. Description. Body cylindrical, with head broader slightly broader than neck, the short tail tapers slightly before a terminal cone. Snout rounded, rostral moderate (0.38–0.53 head width, mean = 0.44), with nearly parallel sides, extending posteriorly to mideye level, posterior border in hexagonal configuration, broader than supranasals; ventral rostral with deep preoral cavity, lateral head profile with a weak blunt beak that extends below lip level, beak narrow ventrally. Behind rostral, upper lip bordered by infranasal (nostril midway between rostral and supralabial along nasal suture), small anterior supralabial that just reaches level of nostril with width along lip equal to that of infranasal, and moderate posterior supralabial. Frontal semilunate, more than twice as broad as deep, larger than supraoculars and postfrontal; interocular line along rostral-frontal suture; interparietal and interoccipital broader than frontal or postfrontal. Ocular slightly oblique, small eye with distict pupil beneath upper anterior border; parietals transverse, occipitals enlarged in type but occipitals not fused in other specimens; parietals transverse, in contact with posterior supralabial, occipitals fused and enlarged. Temporal single. Cloacal shield semilunate; no apical spine, tail terminating in a smooth cone. Prominent tubercles on all head shields except parietals and occipitals. Body covered with 14 rows of smooth, imbricate, subequal scales, reducing to 12 rows on the tail. Middorsals 311–335; subcaudals 28–34. Total length/diameter ratio 59–99; total length/tail length ratio 11.1–15.3. Holotype uniformly pinkish-beige but other specimens light brown. A specimen from the Awash National Park (BMNH 1977.2249) has the seven dorsal scale rows medium brown, chin and anterior venter pure white for the first 50 scales, rest of venter pale brown, subcaudals medium brown. Size. Largest specimen (MZUF 12270 — Awash National Park, Ethiopia) 158.5 + 11.5 = 170 mm. Distribution. The Red Sea coast of Eritrea and the Dahlak Archipelago, extending inland to the Awash National Park in eastern Ethiopia in the southwestern corner of the Afar depression (which until the mid-Pliocene was connected with southwestern Arabia — Parker, 1949; Leviton, 1986), 0–1000 m (Plate 5). Localities. ERITREA. Azzillek River, near Assab MZUF 30109; Dahlak Island (Steindachner, 1901); Entedebir Island TAU 13643; Massaua MSNM 3349. ETHIOPIA. Awash National Park BMNH 1971.767, 1977.2249; MZUF 12270.Published as part of Published, First, 2007, A revision of the genus Leptotyphlops in northeastern Africa and southwestern Arabia (Serpentes: Leptotyphlopidae), pp. 1-78 in Zootaxa 1408 on page 21, DOI: 10.5281/zenodo.678906
Performance of Centrospazio Hypersonic High Enthalpy Wind Tunnel
No full textA new High Enthalpy Arc-heated Tunnel (HEAT) for aerothermodynamic research on hypersonic air flows has been operating at Centrospazio since 1996. Numerical simulation of the flow-field and classical semi-empirical correlations for electric discharges in high pressure gases have been used to extrapolate the available experimental data and predict the performance envelope of the facility in terms of total pressure and specific enthalpy in the test section as functions of the operational constraints imposed by the electric power supply and gas feeding systems. The results show that, with just minor modifications of the experimental apparatus, the Reynolds number per unit length can be increased by an order of magnitude above the value attained in the present configuration. Performance maps of the facility are shown and a comparison with other European hypersonic facilities is provided
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Square Dancing with the Stars to Enhance Dynamic Hirschman Linkages?
No full textIn this Presidential Address, the author takes the reader on a reconnaissance of his life and time as a regional scientist. He points out scenery he found scintillating along the way, hoping that some may pick up the banner and chew on a few of the ideas for a while. He suggests a revisit to Albert O. Hirschman’s notion of key sectors and more empirical analysis related to Marcus Berliant’s and Masahisa Fujita’s notion of knowledge creation and transfer.Presidential Address, San Antonio, Texas, March 29, 2014 (53rd Meetings of the Southern Regional Science Association
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Wide-awake anesthesia in Dupuytren's contracture treated with collagenase
No full textThe injection of collagenase followed by cord manipulation is one of the most popular treatments for Dupuytren's contracture. This is traditionally performed under local anesthesia or regional nerve block potentially with sedation. Neither the treatment with collagenase, nor the wide-awake anesthesia are novel techniques for hand surgeons. Nevertheless, we report the first experience of cord manipulation using the wide-awake approach. In this prospective study, we compared the pain perception of patients who underwent wide-awake anesthesia versus traditional local anesthesia. We recorded the pain sensation on a visual analog scale (VAS) (0 to 10) during anesthetic injection, during cord manipulation and before discharge. Wide-awake anesthesia significantly reduced pain levels during anesthetic injection (p = 0.003) and cord manipulation (p = 0.0009). Pain levels did not differ significantly right before discharge in the two groups (p = 0.54). Wide-awake anesthesia can be successfully applied to cord manipulation after collagenase injection in Dupuytren's contracture. This way, it is possible to improve the patient's subjective perspective of the procedure
Isoelectric focusing studies of human pancreatic secretion
No full textPure bile, pancreatic and duodenal human juices have been analyzed by isoelectric focusing, either at rest or upon stimulation with caerulein. In rats, stimulation has also been performed by secretin. Twenty bands have been resolved and quantified in the pancreatic secretion. By developing zymograms, a number of isozymes have been identified: 6 iso-amylases [pl's 7.2, 7.1 and 6.6 (major) and pl's 7.4, 6.7 and 5.8 (minor)], 3 lipases [pl's 7.0 and 6.8 (major) and 6.4 (minor)], two major alkaline proteases (pl's 9.8 and 8.4) and one major acidic protease (pl 4.3) and one band of RNAase activity (pl 8.6). The stimulation kinetics follow a mechanism according to Palade, indicating uniform response to secretogogues, parallel intracellular transport and parallel discharge of pancreatic exocrine proteins
Letter from unknown writer to Jesse L. Boyce
No full textLetter to Jesse L. Boyce from unknown author (possibly Jack) about the investigation into the powder magazine located in the Grand Canyon. Some personal news is included in the letter such as the writer's marriage to the daughter of C.A. Taylor, former Supervisor of Cochise County
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