126,107 research outputs found
MU freshman student John Lantz
No full textMU freshman student John Lantz, b&w. Note attached state John Lantz, Fr., Huntington, WV.https://mds.marshall.edu/parthenon_photo_morgue/1248/thumbnail.jp
Lois B. Lantz Papers
No full text3.25 Linear Feet. Two boxes, one is oversized. Mostly music/theatre programs with some objects that are in good condition
Anti-Poliomyelitis Substance in Milk, Lay Correspondence -- 1950-1952 -- Correspondence, Polio -- letter, 1950-06-06
No full textLetter from Lantz, Jas L. to Sabin, Albert B. dated 1950-06-06.Sabin Collection Fair Use Policy</a
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
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
EVOLUTIONARY TRENDS, MAJOR LINEAGES, AND NEW GENERIC LIMITS IN THE DIOECIOUS GROUP OF THE TRIBE VANGUERIEAE (RUBIACEAE): INSIGHTS INTO THE EVOLUTION OF FUNCTIONAL DIOECY
No full textInternational audienceNew generic circumscriptions of the Paleotropical tribe Vanguerieae in the subfamily Ixoroideae s.l. (Rubiaceae) have recently been established as a result of a series of phylogenetic studies conducted by Lantz and Bremer. The genus Canthium Lam. was shown in their study to be highly polyphyletic, and a largely dioecious group was for the first time identified within Vanguerieae. The dioecious group sensu Lantz and Bremer comprises about 140 species classified in eight genera: Canthium (Canthium subg. Bullockia Bridson), Dinocanthium Bremek., Leroya Cavaco, Neoleroya Cavaco, Peponidium (Baill.) Are`nes, Pseudopeponidium Homolles ex Are`nes, Pyrostria Comm. ex Juss., and Scyphochlamys Balf. f. We sequenced 79 Vanguerieae taxa and performed phylogenetic analyses based on sequence data from two nuclear (ETS and ITS) markers to: (1) pinpoint the phylogenetic positions of the Comorean and Indian Ocean Canthium and the Southeast Asian Canthium confertum Korth. group in Vanguerieae; (2) evaluate the phylogenetic utility of three taxonomic characters (bract type, locule number, and fruit shape) previously and currently used for delimiting genera in the dioecious group; and (3) assess the evolution of functional dioecy in Vanguerieae. The results support a further disintegration of Canthium s.l., as the Comorean and Malagasy Canthium species are shown for the first time to be closely related to Peponidium. Similarly, C. confertum appears to have a close affinity with Cyclophyllum Hook. f. The combined analyses show that the dioecious group can be subdivided into four morphologically distinct clades formally recognized as genera: Bullockia (Bridson) Razafim., Lantz & B. Bremer, here elevated from Canthium subgen. Bullockia Bridson, as well as Cyclophyllum, Peponidium (including all Comorean, Malagasy, and Seychellean Canthium species), and Pyrostria (including Dinocanthium, Leroya, Neoleroya, Pseudopeponidium, and Scyphochlamys). All described species of Canthium subgen. Bullockia are transferred to Bullockia: B. dyscriton (Bullock) Razafim., Lantz&B. Bremer, B. fadenii (Bridson) Razafim., Lantz&B. Bremer, B. impressinervia (Bridson) Razafim., Lantz & B. Bremer, B. mombazensis (Baill.) Razafim., Lantz & B. Bremer, B. pseudosetiflora (Bridson) Razafim., Lantz & B. Bremer, and B. setiflora (Hiern) Razafim., Lantz & B. Bremer. Furthermore, the results seem to point to a single origin of functional dioecy followed by subsequent reversals back to the hermaphroditic conditions at least within the Cyclophyllum–Canthium confertum clade and Pyrostria s.l. The Malagasy Bullockia species seem to have an African ancestor, whereas the Comorean Peponidium and the African Pyrostria appear to have originated from Malagasy progenitors
Apron and cutoff wall scour protection for piano key weirs
No full textPiano key (PK) weirs are used in a variety of flow control structure applications, including spillway crests and open channel diversion structures. However, to the best of authors’ knowledge, structure-specific design guidance for scour mitigation is still needed. To fill this gap of knowledge, a systematic experimental campaign was conducted by testing different configurations of horizontal aprons with a cutoff wall. Protection structures were located at the toe of the PK weir. Namely, experiments were performed at large-scale to assess the effect of three apron lengths on downstream scour hole geometry under different hydraulic conditions. It was observed that a horizontal apron deflects the plunging jets originating from the PK weir, thus significantly reducing scour. Experimental evidence allowed corroboration that significant scour depth reduction occurs for an apron length 1.5 times the weir height, with longer aprons found to provide marginal benefits. Finally, also provided herein are tools to estimate the main scour characteristics and help practitioners in optimizing apron design
Flood infrastructure: Localized scour at piano key weirs
No full textHistoric growth in the US coupled with observed hydrologic changes have created an increased demand for sustainable flood protection. One approach to passing floodwaters is nonlinear weirs such as labyrinth and Piano Key weirs (PK weirs). Although they are being designed in greater frequency, one area lacking in information or design guidance is the prediction of local scour at these weirs. Without proper protection, downstream local scour can compromise the weirs' foundation. Therefore, a large-scale laboratory study has been undertaken to investigate the effect of different lengths of downstream aprons on the scour mechanism at the foundation of a PK weir. This paper presents a preliminary analysis of equilibrium scour morphology under different flow conditions and with non-cohesive bed material. Instrumentation included 3D cameras and ultrasonic sensors to capture scour features and measure dynamic water surface elevations, respectively
FIG. 2 in Three new species of Vanguerieae (Rubiaceae) from Madagascar
No full textFIG. 2. — Pyrostria pendula Lantz, Klack. & Razafim.: A, flowering branch; B, close-up of female inflorescences; C, flower bud; D, female flower, one corolla lobe and corresponding part of tube removed, tangential longisection; E, part of female corolla; F, close-up of hair from inside of corolla; G, style; H, fruit. Scale bars: A, 1 cm; B, H, 5 mm; C-E, G, 3 mm; F, 0.5 mm.Published as part of Lantz, Henrik, Klackenberg, Jens, Razafimandimbison, Sylvain & Mouly, Arnaud, 2007, Three new species of Vanguerieae (Rubiaceae) from Madagascar, pp. 129-136 in Adansonia (3) 29 (1) on page 133, DOI: 10.5281/zenodo.518729
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