1,720,955 research outputs found
Lighting for Bush Bean (Phaseolus vulgaris) Production in a Controlled Environment
Get PDFPlants use light as energy for photosynthesis and a signal to regulate growth and development. Each characteristic of the light environment, including the intensity, spectrum, photoperiod, and distribution, can influence net carbon exchange rates (NCER), morphology, and yield. Variable spectra light-emitting diode (LED) arrays allow for programmable control of the light environment and can be placed directly within the canopy to improve light distribution. The effects of light spectrum, intensity, and canopy distribution on green bush bean (Phaseolus vulgaris) were investigated within controlled environment systems (CES). Plant-light interactions were studied to develop an energy-efficient LED lighting strategy for high-density indoor production. Intracanopy lighting trials determined that improved light distribution increased bean yield, reduced height, and improved compatibility with high-density indoor production strategies. A spectral acclimation trial determined that increasing the proportion of blue light (400-500 nm) from 10 to 40% reduced height and promoted compact morphology during vegetative growth. Light response curves determined that acclimation to higher concentrations of blue light had a consistent but not statistically significant (α = 0.05) improvement on NCER performance. Sixty unique light spectra (%B:%G:%R) were applied at a fixed light intensity (250 μmol·m-2·s-1) to model the relationship between light spectrum, energy consumption, and canopy NCER. The maximum NCER (3.31 μmol CO2·m-2·s-1) and NCER/kW (23.34 μmol CO2·m-2·s-1·kW) were observed when applying 16B:24G:61R and 4B:7G:89R, respectively. Finally, fifteen spectra were applied at three light intensities (200, 300, and 400 μmol·m-2·s-1) to characterise plant-light interactions. The NCER, kW, and NCER/kW responses were used to create a “light response prism” comprised of stacked ternary plots. The maximum NCER (1.5 μmol CO2·m-2·s-1) was observed when applying ~100% red (600-700 nm) light at 400 μmol·m-2·s-1, and optimal NCER/kW balance (11.75 μmol CO2·m-2·s-1·kW) was observed when applying ~100% red light at 316 μmol·m-2·s-1. While this thesis provided a foundation to optimize bush bean lighting strategies, additional research is required to determine how long-term exposure to the light environments selected will impact crop morphology, yield, and nutritional quality.Natural Sciences and Engineering Research Council of CanadaIntravision Lighting Systems Inc.TCA Technologies Inc
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
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
Appropriate 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
Postharvest quality implications of pre-harvest treatments applied to enhance Ambrosia™ apple red blush color at harvest.
Get PDFTwo approaches for enhancing red blush in Ambrosia™ apple were evaluated; 1) reflective row covers, or 2) application of foliar phosphorus-rich sprays, both applied several weeks before anticipated harvest. Two experiments were conducted, the first to evaluate a white reflective row cover versus foliar phosphorus spray and the second to evaluate two types of reflective row cover, one being made of a woven white polyethylene and the other a solid silvered Mylar®. The comparative effect these pre-harvest treatments on at-harvest fruit quality and quality after storage were assessed in both experiments. It was determined that foliar phosphorus sprays or one of the two types of reflective row covers resulted in similar enhancement of red blush colour with no negative effects on at-harvest quality. However, in the first experiment it was found that after 8 months CA storage (1 kPa O2 + 1 kPa CO2 at 0.5 °C), apples from the phosphorus foliar spray treatment developed greasiness and sooty blotch, as compared with either those from the reflective row cover or control treatments. In the second experiment, after 5 months of air storage at 0.5 °C, the apples from the silvered Mylar® reflective row cover treatment developed severe soft scald and soggy breakdown as compared with the control and white reflective row cover treatments which developed lower or very slight incidence in soft scald, respectively, and no soggy breakdown. These results indicate that when pre-harvest treatments are applied to apples, that post-storage quality effects should be evaluated.The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author
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
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
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