1,720,958 research outputs found
Improvement of biofloc system for post larval rearing of giant freshwater prawn (Macrobrachium rosenbergii de Man, 1879)
Full text linkGiant freshwater prawn, Macrobrachium rosenbergii, is a commercially important
crustacean, which is being cultured throughout the South-East Asia. The production of
M. rosenbergii has been declined owing to lack of adequate post larvae (PL) production,
non-effective farming system and diseases that cause high economic losses. Biofloc
technology (BFT) can be an alternative culture system as it has been proven a viable
culture system that improves water quality, provides live feeds and health care of culture
species as well as increases the production of many fishes, prawns and shrimps. Little
report is published on prawn productive performance in biofloc technology system
(BFT) so far. This study was conducted to investigate the growth, survival and proximate
composition of M. rosenbergii PL in BFT. Therefore, five experiments were conducted
on nursery phase of M. rosenbergii PL to identify the suitable carbon source, C-N ratio,
salinity and floc volume, and influence of copepod addition in BFT under completely
randomized design of each treatment with triplicate. The first experiment tested five
carbon sources i.e., wheat bran, rice flour, maize starch, molasses and palm kernel cake
for biofloc. The PL growth was similar (P > 0.05) among five carbon sources. PLs
survival (88.66%) was higher (P < 0.05) in maize starch and followed by rice flour
(73.0%), molasses (68.33%), wheat bran (61.0%) and palm kernel cake (56.33%)
treatments. The better FCR (2.21) and the highest lipid content (1.98% dry weight) were
obtained in maize starch bioflocs than other four carbon sources. The water quality
parameters viz. temperature, pH, dissolved oxygen and ammonia did not differ (P > 0.05)
among five different carbon treatments. The second experiment examined the effects of
four C-N ratios of 10, 15, 20, 25 and clear water system as control. Specific growth rate
(SGR) was similar between the control (9.29% d-1) and the CN-20 (9.47% d-1) and CN-
25 (9.34% d-1) treatments which were significantly higher than that in the C-N10
treatment (8.03% d-1). A higher survival (87.34%) was obtained in the C-N ratio 20 when
compared to control (80.33%) and other C-N ratios groups, but no significant differences
among five treatments were observed. The best FCR (2.65) was observed in the C-N
ratio 20 treatment. Biofloc crude protein content was higher in the C-N ratio 20 than CN
ratio 10, 15 and 25 groups. The third experiment was conducted to compare the performance of BFT under four different salinities (0, 5, 10 and 15‰). Better growth of
PLs were found in 10‰ and 15‰ saline water biofloc system. A higher survival
(85.66%) of M. rosenbergii PL was obtained in 15‰ biofloc system and followed
by10‰, 5‰ and freshwater BFT. The best FCR was found in 15‰ and 10‰ salinity
groups. Ciliate and rotifer abundances were higher in 15 ‰ saline water biofloc system
than 10‰, 5‰ and freshwater biofloc system. A lower density of Vibrio spp. remained
in 15‰ biofloc system than in 10‰ system. The fourth experiment investigated the
effects of different floc volume of 2-5, 7-10 and 12-15 ml L-1 as well as zero-exchange
BFT (control). A higher (P < 0.05) prawn survival (82.33%) was obtained in 2-5 ml L-1
floc treatment and followed by 7-10, 12-15 ml L-1 and zero-exchange BFT treatments.
Vibrio spp. density was lower (P < 0.05) in 2-5 ml L-1 floc treatment than 12-15 ml L-1
and zero-exchange BFT. The fifth experiment was conducted to evaluate the effects of
copepod addition in BFT under three treatments i.e., clear water system as control, BFT
with or without copepods addition. A higher final weight (117.23 mg), weight gain
(107.82 mg), SGR (8.40 % d-1), and survival (94.46%) of PLs were found in BFT with
copepod addition treatment (P < 0.05) than BFT without copepod and control. The best
FCR (1.08) and crude protein content (66.91%) in PLs were significantly higher (P <
0.05) in the copepod addition BFT than without copepod addition BFT and control.
Significantly lower ammonia was found in two BFT groups than control. Overall, the
study suggested that maize starch as carbon source; C-N ratio of 20, salinity range of 10-
15 ‰, floc volume 2-5 ml L-1 and addition of copepod for the better growth and survival
of M. rosenbergii PL in the nursery phase using BFT. Thus, the biofloc based nursery
system could be implemented in commercial venture of M. rosenbergii industry to
enhance the productivity and profit
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Variations on the Author
Full text link“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
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe 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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Author Under Sail The Imagination of Jack London, 1893-1902
No full textIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Intro -- Title Page -- Copyright Page -- Dedication -- Contents -- Acknowledgments -- Introduction -- 1. Spirit Truth -- 2. From Absorption to Theatricality and Back Again -- 3. "I Will Build a New Present" -- 4. Sons as Authors -- 5. Fathers as Publishers -- 6. The Daughter as Author -- 7. Lovers as Authors -- 8. At Sea with the Family -- 9. Yellow News, Yellow Stories -- 10. The Return Home -- Notes -- Bibliography -- Index -- About Jay WilliamsIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
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