118,311 research outputs found
Barbierella Chavan 1938
No full textGenus Barbierella Chavan, 1938 Cavilucina (Barbierella) Chavan, 1938: 115. TYPE SPECIES. — Lucina barbieri Deshayes, 1857, early Eocene, Paris Basin (original designation). DIAGNOSIS. — Small, less than 12 mm long, ovately trigonal, prominent posterior sulcus, with marginal sinus. Sculpture of prominent, reflexed, regularly spaced, scalloped, commarginal lamellae with underlying radial undulations. Thickening of lamellae aligned in radial lines. Lamellae raised into short spines along ventral edge of posterior sulcus. Lunule short, deeply impressed. Ligament short, external. Hinge: RV with a single narrow cardinal tooth, LV with a socket. Lateral teeth absent or vestigial, small anterior lateral tooth present in B. barbieri. Anterior adductor muscle scar short, diverging from pallial line for about 1/3 of length. Pallial line entire. Inner shell margin undulose to coarsely plicate. GEOLOGICAL RANGE. — Paleocene (Late Danian) to Recent. INCLUDED SPECIES. — Paleocene. Late Danian: Barbierella briarti (Cossmann, 1908) Calcaire de Mons, Belgium (see Glibert & van de Poel 1973: 28, pl. 5, fig. 5). Eocene. Barbierella barbieri (Deshayes, 1857) (1857: 651-652, pl. 43, figs 1-5) known from Ypresian and Lutetian of the Paris Basin, France (Fig. 3 A-D); also figured by Cossmann & Pissarro (1904 -6, pl. 24, fig. 82-16). Barbierella navicula (Cossmann, 1904) (1904: 152, pl. 10, figs 18-20) is a similar species from Bartonian sands at Bois-Gouët, Loire-Atlantique, France. Miocene. Barbierella miobarbieri (Sacco, 1901) (1901: 97, pl. 21, fig. 6), Piedmont, Italy (Fig. 3E, F), see also Merlino (2007: pl. 15, fig. 12a, b). Recent. Barbierella louisensis (Viader, 1951) Mauritius and Mozambique Channel (Fig. 4) and synonym B. scitula Oliver & Abou-Zeid, 1986, northern Red Sea (Fig. 4 E-G). REMARKS The hinge of B. barbieri was illustrated by Cossmann (1913: 86, fig. 100) who claimed two cardinal teeth in each valve with the anterior much reduced. He also illustrated anterior and indistinct posterior lateral teeth in each valve but these are barely visible in Eocene specimens we have examined (Fig. 3B, C). In living B. louisensis the lateral teeth are absent and there are no visible cardinal teeth in the left valve but they may be fused with the edge of the lunule and ligamental ridge. Prior to the introduction of the name Barbierella the placement of Lucina barbieri had been unstable and variously included in Phacoides Agassiz, 1846, Here Gabb, 1866 and Lucinisca Dall, 1901, although Cossmann (1913: 86) recognised its unusual features and uncertain assignment. Proposing Barbierella as a subgenus Chavan (1938: 114-115) considered it related to but separate from Cavilucina P. Fischer, 1887 and also noted a possible resemblance to Recurvella Chavan, 1937 (type species Lucina dolabra Conrad, 1833) from the Eocene of eastern United States of America (USA). Sacco (1901) placed B. miobarbieri in Here Gabb, 1866, Recent, northeastern Pacific, probably because of the deeply scooped lunule but otherwise the shells are dissimilar. Later, Woodring (1925: 121) stated “The lucinoid described by Sacco as Here miobarbieri from the Helvetian of the Piedmont basin, probably is a Pleurolucina ”. However, although there is some similarity of external sculpture the hinge teeth are quite different, Pleurolucina Dall, 1901 having two cardinal teeth and prominent lateral teeth in each valve. The deeply scooped lunule impinging on the cardinal teeth and commarginal lamellae resemble some living Lamellolucina Taylor & Glover, 2002 species such as L. gemma (Reeve, 1850) but all species in the genus have strong lateral teeth. Although from shell characters we place Barbierella in the Lucininae the relationships of this enigmatic genus remain uncertain pending inclusion in molecular analyses. Throughout their geological range Barbierella species have always been rare. In the original description of B. barbieri Deshayes (1857: 652) remarked on “this rare and beautiful shell”. Sacco (1901: 97) said that B. miobarbieri (as Here) was rather rare in the Miocene of northern Italy. From probable mid-late Miocene rocks of Cyprus, Reed (1935: 5) recorded a partial external mold (SM C8911) of Barbierella miobarbieri (as Phacoides (Pleurolucina)) and Studencka et al. (1998) recorded B. miobarbieri as rare in mid-Miocene deposits of Parathethys.Published as part of Taylor, John D. & Glover, Emily A., 2018, Hanging on - lucinid bivalve survivors from the Paleocene and Eocene in the western Indian Ocean (Bivalvia: Lucinidae), pp. 123-142 in Zoosystema 40 (7) on pages 129-130, DOI: 10.5252/zoosystema2018v40a7, http://zenodo.org/record/373824
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
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
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Sarah L. Blum Author Visit - Warrior Nurse: PTSD and Healing
No full textHear Sarah L. Blum, author of Women Under Fire: Abuse in the Military, discuss her newest book, Warrior Nurse: PTSD and Healing followed by a Q&A and book signing.
Sarah L. Blum is a decorated Vietnam veteran who served as an operating room nurse during the intense fighting of 1967. In recognition of her service, she was awarded the Army Commendation Medal.
Sponsored by CWU Veterans Center and CWU Libraries.https://digitalcommons.cwu.edu/libraryevents/1252/thumbnail.jp
Lillian L. Lambert, Author, Speaker, and Entrepreneur
No full textLillian L. Lambert, Author, Speaker, and Entrepreneu
Letter to Alfred L. Shoemaker, February 10, 1948
No full textA handwritten letter from an unknown author addressed to Alfred L. Shoemaker, dated February 10, 1948. Within, the author discusses the Pennsylvania Dutch word for Ash Wednesday, along with traditions associated with this day.https://digitalcommons.ursinus.edu/shoemaker_documents/1118/thumbnail.jp
Expatriate cultural identity negotiation strategies: a dynamic framework *
No full textIn response to the somewhat paradoxical combination of increasing diversity in the global workforce and the resurgence of nationalism in an era of global mobility, this chapter aims to uncover how employees on international assignments respond to exposure to new cultures. Specifically, the study aims to explicate the underlying psychological mechanisms linking expatriates' monocultural, multicultural, global, and cosmopolitan identity negotiation strategies with their responses toward the host culture by drawing upon exclusionary and integrative reactions theory in cross-cultural psychology. This conceptual chapter draws on the perspective of exclusionary versus integrative reactions toward foreign cultures – a perspective rooted in cross-cultural psychology research – to categorize expatriates' responses toward the host culture. More specifically, the study elaborates how two primary activators of expatriates' responses toward the host culture – the salience of home-culture identity and a cultural learning mindset – explain the relationship between cultural identity negotiation strategies and expatriates' exclusionary and integrative responses. The following metaphors for these different types of cultural identity negotiation strategies are introduced: “ostrich” (monocultural strategy), “frog” (multicultural strategy), “bird” (global strategy), and “lizard” (cosmopolitan strategy). The proposed dynamic framework of cultural identity negotiation strategies illustrates the sophisticated nature of expatriates' responses to new cultures. This chapter also emphasizes that cross-cultural training tempering expatriates' exclusionary reactions and encouraging integrative reactions is crucial for more effective expatriation in a multicultural work environment
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