1,721,006 research outputs found
Phylogenetic abnalysis of Malaysian pineapples cultivars based on the DNA sequence of the internal transcribed spacer region
No full textThe phylogenetic study was conducted to determine the phylogenetic status and evolutionary relationships among the nine commercial pineapple cultivars using sequences of the internal transcribed spacer (ITS) region. Genomic DNA was extracted, and the ITS region was amplified and sequenced. Parsimony analysis revealed that Malaysian cultivars could be classified into two major groups based on the ITS region. The first group comprised of the cultivars Sarawak Green Local, Gandul, and N36 whereas the second group consisted of the cultivars Josapine, Yankee, Morris Bentanggur, Morris Gajah, MD2 and MD2/T. Several combinations of synapomorphic characters (leaf and fruit) support this classification system, suggesting the ITS region has the ability to determine the phylogenetic status and relationships of pineapple cultivars. Since each group has its own similar genetic pattern and presumably certain specific biochemical properties, the relationships of pineapple cultivars revealed in the phylogenetic tree can be used as a basis for successful hybridizations to generate new pineapple cultivars
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Evolutionary analysis of pollinaria morphology of subtribe Aeridinae (Orchidaceae)
No full textHIDAYAT, TOPIK; YUKAWA, TOMOHISA; ITO, MOTOMI. 2006. Evolutionary analysis of pollinaria morphology of subtribe Aeridinae (Orchidaceae). Reinwardtia 12(3): 223–235. –– Pollinarium is one of the distinct synapomorphies of Orchidaceae. With using characters derived from the pollinarium, phylogenetic relationships among genera of subtribe Aeridinae was examined. Cladistic analysis showed that (1) Subtribe Aeridinae is monophyletic group. (2) Five of six groups constructed in the analysis are consistent with the groups recognized in previous molecular phylogenetic analyses. (3) The genera Cleisostoma and Phalaenopsis are non-monophyletic group. (4) Pollinarium morphology endorses monophyly Trichoglottis and Phalaenopsis alliances. (5) Although transformation of the stipe and viscidium shapes in the subtribe is subjected to parallelism, the results showed that these characters are much useful in determining relationships in the subtribe than those of pollinium
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Phenetic relationships of nine varieties of potato (Solanum tuberosum L.) based on morphological characters
No full textAppropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe 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
Analisis pengaruh daya tarik, kredibilitas dan keahlian Celebrity Endorser terhadap keputusan pembelian sepeda Motor Yamaha Mio: Studi pada pengguna motor Yamaha Mio di Daerah Ciledug - Tangerang
No full textPenelitian ini memiliki tujuan Untuk menganalisis Daya Tarik, Kredibilitas, Dan Keahlian Celebrity Endorser secara simultan mempunyai pengaruh yang signifikan terhadap keputusan pembelian, untuk menganalisis Daya Tarik, Kredibilitas, Dan Keahlian Celebrity Endorser secara parsial mempunyai pengaruh yang signifikan terhadap keputusan pembelian, untuk menganalisis variabel bebas manakah yang sangat dominan berpengaruh terhadap keputusan pembelian. Penelitian ini menggunakan analisa regresi linier berganda. Data yang digunakan dalam penelitian ini menggunakan data primer yang diperoleh dari jawaban dari responden yang pernah menggunakan Yamaha mio yang diberikan beberapa pertanyaan. Pemilihan sampel pada penelitian ini adalah semua pengguna Yamaha Mio. Hasil penelitian ini menunjukkan bahwa terdapat pengaruh secara simultan pada variabel daya tarik, Kredibilitas dan keahlian terhadap Keputusan Pembelian. Hasil penelitian ini juga menunjukkan variabel daya tarik, Kredibilitas dan keahlian berpengaruh signifikan secara parsial terhadap Keputusan Pembelian. Pada uji determinasi terdapat pengaruh sebesar 57,2% yang mempengaruhi Keputusan Pembelian yang dijelaskan oleh variabel daya tarik, Kredibilitas dan keahlian, sedangkan sisanya 42,8% dipengaruhi oleh variabel lain dan tidak termasuk kedalam analisis regresi ini
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
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