117,795 research outputs found
QTL ANALYSIS OF FIBER COLOR AND FIBER QUALITY IN NATURALLY GREEN COLORED COTTON (Gossypium hirsutum L.)
No full textImproving fiber quality of naturally colored cotton has become more important in recent years due to changes in the spinning technology and consumer demand. The identification of quantitative trait loci (QTL) closely linked to the fiber quality traits can allow marker assisted selection (MAS) which leads us to future's improved cotton cultivars. In this study, we performed genetic mapping on F-2 population of G. hirsutum (Yesil x Nazilli 84) intraspecific cross, and identified QTL for fiber color parameters (L, a, b, Delta L, Delta a, Delta b, Delta E) and fiber quality traits (fiber length, uniformity and elongation). The resulting genetic linkage map comprised of 123 amplified fragment length polymorphism (AFLP) markers and 27 linkage groups (LGs), covering 2068.5cM with an average distance of 16.8cM between two markers. Using single marker analysis a total of 43 QTL for fiber color parameters and fiber quality traits were identified, including four for fiber length, two for fiber uniformity, two for fiber elongation, five for L, four for a, four for b, eight for Delta L, four for Delta a, four for Delta b and six for Delta E. The identified QTL for fiber color parameters and fiber quality traits explained between 7.8% and 14.6% and between 5.9% and 14.7% of the phenotypic variation, respectively. Additionally, recombinant individuals having green fiber color together with long fiber length, high fiber uniformity and elongation were obtained in the segregating population. These individuals can be used to develop new cotton varieties in the future.Scientific and Technological Research Council of Turkey [104O589
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
THE POTTERY OF SOUTHERN CAPPADOCIA: PRELIMINARY PETROGRAPHIC ANALYSES OF SHERDS FROM NORTHERN TYANIS
No full textBetween 2006 and 2009 the University of Pavia carried out archaeological survey in Southern Cappadocia.
Despite the historical, archaeological and geological importance of the region, a few studies
have been performed until the present days. More than 30 sites were explored, covering a time span of
around 7000 years, from the Early Chalcolithic down to the Middle ages. The sites are scattered on an
extended area within the province of Niğde (around 800 km2) consisting of the south-eastern slopes of
the Melendiz vulcans and the adjoining alluvial plain.
Ceramic fragments were collected on the surface from all the sites, for a total of over 1300 diagnostic
shards. A systematic study of the ceramic fabric of each diagnostic shard has been performed by means
of a light microscope with stereo vision (binocular microscope), with the aim of characterizing the material
features (texture, sorting, rounding, shape, abundance, grain size, nature of the inclusions). Several
compositional groups were thus defined, on the basis of the mineralogical association of inclusions (minerals
and rock fragments) or the presence of organic temper (plant fibres), some provenance attributes
were identified; this is the main result of the microscope analysis. A set of 54 thin sections was realized,
in order to improve the petrographic knowledge of the most representative groups.
On the basis of the nature of the aplastic inclusions and their petrographic and mineralogical associations,
two main compositional domains are recognised: one shows a predominant crystalline composition,
the other a peculiar volcanic composition. The first domain seems to connect the production to the
Niğde Massif, that is a member of the Central Anatolian Crystalline Complex (CACC), and extends on the
eastern part of the Tyanis plain. The second one pertains to the Cappadocian Volcanic Province (CVP),
extending to the northwestern part of the plain.
A good fit between some petrographic groups and the chronological attribution of shards emerges by
crossing both ceramological and material data, indicating that from the Late Bronze Age (LBA), along
the Iron Age (IA), down to the Hellenistic-Roman period (HR), clay sources used for pottery production
were located in the CACC. This is taken as a clue for a regional organization of pottery production during
this long period, and is possibly connected to the role played by the main centre of the region along this
timespan: LBA Tuwanuwa, IA Tuwana, and HR Tyana
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
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