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Επίδραση τεχνητού φωτισμού διόδων εκπομπής φωτεινής ακτινοβολίας στην αύξηση και ποιότητα εμβολιασμένων σποροφύτων καρπουζιού
No full textWatermelon (Citrullus lanatus) is an economically important crop which is mainly propagated through grafting. Grafted watermelon seedlings are produced in three separate stages: growing of scion and rootstock seedlings to-be-grafted (stage I), grafting and healing of grafted seedlings (stage II), and acclimatization of grafted seedlings (stage III). The main objective of the thesis was to investigate whether artificial lighting provided by light-emitting diodes (LEDs) and employed either as sole or as supplemental light source imposes significant positive effect on the quality of scion and rootstock seedlings to-be-grafted, as well as grafted watermelon seedlings. Moreover, the effect of LED spectral composition was tested in the three production stages of grafted watermelon seedlings both under growth chamber and greenhouse conditions. As model plants we used watermelon (Celine F1) scion and interspecific squash (Cucurbita maxima × C. moschata “TZ-148) rootstock. Initially we defined seedling quality categories in the three production stages. We report that shoot and root biomass, stem diameter and leaf area are the most valuable indicators of seedling quality in all production stages. A combination between “high” scions and “optimum” characterized rootstocks is ideal for high-quality grafted seedlings. Moreover, the necessity of artificial lighting was evaluated in all production stages and we concluded that supplemental lighting is necessary in the greenhouse for the growth of watermelon seedlings used as scion as well as for acclimatization of grafted seedlings, while fluorescent lamps are not as efficient as needed during the healing stage. Following, we tested the response of scions and rootstocks under wide spectra LEDs employed in a growth chamber and found that LEDs with relatively high red (53–64%), and low blue (8–14%) light emission enhanced seedling quality. When grown in a greenhouse, watermelon scions showed improved qualitative characteristics under supplemental LED compared to high-pressure sodium (HPS) lamps due to favorable spectral distribution. Healing is a delicate procedure where physiological and histological modifications take place on both segments, thus, we examined the impact of LEDs emitting narrow-band red (R) or blue (B), or red-blue combinations as sole light source during healing. From the results it is evident that R along with red with 12 or 24% blue (12B or 24B) light addition performed greatly in valuable growth and morphological parameters, while B promoted gas exchange parameters. The results were also reaffirmed by the examination of four genotype combination where no significant genotype dependency was detected. Following, we investigated the anatomical and root architecture modifications and we report that blue light proved beneficial for the rapid formation of scion-rootstock vascular bridges and subsequently for a quick start of root formation in the first three days after grafting. In the following days where all vascular bridges were already formed, red light presence enhanced the root system development. Moreover, grafted watermelon seedlings acclimatizing in a greenhouse showed enhanced quality under supplemental LED compared to HPS lamps. In all LED experiments, we also addressed the effects of red and blue light bands on the seedling morphology and physiology and we showed that even small interplays in the light spectra triggers a significant effect in plant behavior.Το καρπούζι (Citrullus lanatus) είναι οικονομικά σημαντικό προϊόν το οποίο πολλαπλασιάζεται κυρίως μέσω εμβολιασμού. Η παραγωγή εμβολιασμένων σποροφύτων καρπουζιού αποτελείται από τρία διακριτά στάδια: την παραγωγή σποροφύτων προς εμβολιασμό (εμβόλιο και υποκείμενο) (στάδιο Ι), τον εμβολιασμό και την επούλωση των τομών εμβολιασμού (στάδιο ΙΙ), και τη σκληραγώγηση των εμβολιασμένων σποροφύτων (στάδιο ΙΙΙ). Ο κύριος στόχος της διατριβής ήταν η διερεύνηση της επίδρασης τεχνητού φωτισμού από διόδους εκπομπής φωτεινής ακτινοβολίας (light-emitting diodes, LEDs) ως συμπληρωματικός ή αποκλειστικός φωτισμός στην ποιότητα εμβολίων και υποκειμένων προς εμβολιασμό, καθώς και εμβολιασμένων σποροφύτων καρπουζιού. Επιπλέον, μελετήθηκε η επίδραση του φάσματος ακτινοβολίας λαμπτήρων LED στα τρία στάδια παραγωγής εμβολιασμένων σποροφύτων σε θάλαμο ανάπτυξης και σε θερμοκήπιο. Μελετώμενα είδη αποτέλεσαν το καρπούζι (εμβόλιο Celine F1) και το διειδικό υβρίδιο κολοκυθιού (υποκείμενο Cucurbita maxima × C. moschata “TZ-148). Αρχικά, καθορίσαμε κατηγορίες ποιότητας σποροφύτων στα τρία στάδια παραγωγής. Αναφέρουμε ότι το ξηρό βάρος υπέργειου τμήματος και ριζικού συστήματος, η διάμετρος ριζικού κόμβου και η φυλλική επιφάνεια είναι οι σημαντικότεροι δείκτες ποιότητας σποροφύτων στα τρία στάδια παραγωγής. Συνδυασμός «high» εμβολίων με «optimum» υποκειμένων είναι ιδανικός για την παραγωγή εμβολιασμένων σποροφύτων υψηλής ποιότητας. Επιπλέον, διερευνήθηκε η ανάγκη χρήσης τεχνητού φωτισμού στα τρία στάδια παραγωγής και καταλήξαμε ότι είναι απαραίτητος ο συμπληρωματικός φωτισμός στο θερμοκήπιο παραγωγής εμβολίων καθώς και σκληραγώγησης εμβολιασμένων σποροφύτων, ενώ οι λαμπτήρες φθορισμού δεν έχουν υψηλή απόδοση κατά το στάδιο επούλωσης. Κατόπιν, μελετήσαμε την επίδραση λαμπτήρων LED με ευρύ φάσμα ακτινοβολίας στην παραγωγή εμβολίων και υποκειμένων σε θάλαμο ανάπτυξης και βρήκαμε ότι LEDs με σχετικά υψηλό ποσοστό ερυθρού φωτός (53-64%) και χαμηλό ποσοστό κυανού φωτός (8-14%) οδήγησε σε ενισχυμένη ποιότητα. Στην περίπτωση του θερμοκηπίου, εμβόλια καρπουζιού παρουσίασαν βελτιωμένα ποιοτικά χαρακτηριστικά κάτω από συμπληρωματικό φωτισμό με LEDs συγκριτικά με λαμπτήρες υψηλής πίεσης νατρίου (HPS) λόγω ευνοϊκότερου φάσματος ακτινοβολίας. Η επούλωση αποτελεί ευαίσθητη διαδικασία κατά την οποία λαμβάνουν χώρα φυσιολογικές και ιστολογικές μεταβολές στα δύο τμήματα. Επομένως, μελετήσαμε την επίδραση φωτισμού με LEDs που εκπέμπουν ακτινοβολία μονοχρωματική ερυθρή (R), κυανή (Β) και συνδυασμούς ερυθρής-κυανής κατά τη διάρκεια της επούλωσης. Από τα αποτελέσματα προέκυψε ότι η R καθώς και ερυθρή με 12 ή 24% επιπρόσθετη κυανή ακτινοβολία (12Β ή 24Β) είχε θετική επίδραση σε σημαντικές μορφολογικές παραμέτρους, ενώ η Β ενίσχυσε παραμέτρους ανταλλαγής αερίων. Τα αποτελέσματα επιβεβαιώθηκαν από τη διερεύνηση τεσσάρων συνδυασμών γενοτύπων όπου δεν εντοπίστηκε σημαντική επίδραση του γενοτύπου. Κατόπιν, μελετήσαμε μεταβολές στην ανατομία της τομής εμβολιασμού και της αρχιτεκτονικής ρίζας και βρήκαμε ότι η κυανή ακτινοβολία είναι ευνοϊκή για την ταχεία ένωση του αγγειακού συστήματος εμβολίου-υποκειμένου και τον σχηματισμού ριζικού συστήματος τρεις μέρες από τον εμβολιασμό. Τις επόμενες ημέρες συνεχίστηκε η ένωση του αγγειακού συστήματος και η παρουσία ερυθρής ακτινοβολίας βελτίωσε την ανάπτυξη του ριζικού συστήματος. Επιπλέον, εμβολιασμένα σπορόφυτα κατά την σκληραγώγηση στο θερμοκήπιο παρουσίασαν αυξημένη ποιότητα κάτω από συμπληρωματικό φωτισμό με LEDs συγκριτικά με λαμπτήρες υψηλής πίεσης νατρίου (HPS). Σε όλα τα πειράματα με λαμπτήρες LED αναδείξαμε την επίδραση του ερυθρού και κυανού φάσματος ακτινοβολίας στη μορφολογία και φυσιολογία σποροφύτων και αποδείξαμε ότι ακόμα και μικρές μεταβολές στο φάσμα ακτινοβολίας ασκεί σημαντική επίδραση στη συμπεριφορά των φυτών
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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