1,720,961 research outputs found
Synthesizing Colloidal Zinc Oxide Nanoparticles for Effective Disinfection; Impact on the Inhibitory Growth of Pseudomonas aeruginosa on the Surface of an Infectious Unit
No full textProviding Water Quality Index for Water use in Agriculture: A Case Study
No full textBackground: Most countries face water scarcity, population growth, climate change, uneven water distribution, excessive water use, and biological, agricultural, and industrial water pollution. Using wastewater and brackish waterways for cultivation reduces pollution. Polluted water impacts human biology. Thus, they must be adequately studied before irrigating crops.
Methods: This study used the analytical hierarchy process (AHP) to assess the quality of non-conventional agricultural waters from the Karaj and Anbaj wastewater treatment plants in Iran. Water quality was evaluated based on 7 primary criteria and 52 sub-criteria. The Canadian Water Quality Index (CWQI) and the proposed model were developed from the measured parameters of the effluent from both the Anbaj and Karaj treatment plants. The data were analyzed using the Expert Choice software.
Results: In this study, chloride, fecal coliforms, and intestinal parasite eggs received the highest scores, while arsenic (As) and molybdenum (Mo) were assigned the lowest scores. The findings indicated that the effluent from the Anbaj wastewater treatment plant requires extensive treatment before being suitable for agricultural use. In contrast, the effluent from the Karaj wastewater treatment plant was of moderate quality and requires minimal treatment. This study recommends applying the proposed model to evaluate wastewater quality for agricultural purposes.
Conclusion: Researches of soil and wastewater interactions suggests that crops irrigated with wastewater may pose risks to both ecosystems and human health due to physical, chemical, and microbiological factors. These impacts can compromise soil fertility and productivity. Therefore, the use of wastewater in agricultural practices should be implemented with appropriate safeguards
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
Environmental Potential Evaluation of Anzan Area in Sabalam Mountain for Tourism Development Using GIS
No full textImproving the Microorganism Function at Different Concentrations of Folic Acid, Nitrogen and Phosphor in Biological Wastewater Treatment of Tabriz Petrochemical
No full textBiological treatment of wastewater depends on different factors including the nutrient and vitamin contents. In this study, the effects of different concentrations of folic acid (0.1 ppm, 0.2 ppm, and 0.4 ppm) together with different amounts of nitrogen (20 ppm, 30 ppm, and 40 ppm) and phosphorus (4 ppm, 6 ppm, and 10 ppm) were studied on the biological treatment of the industrial effluent from Tabriz Petrochemical Plant. The Taguchi method with an L9 orthogonal array was used to determine the optimum conditions for the growth of microorganisms. Turbidity, BOD5, TSS, and MLSS were measured as the main parameters of the treated effluent. The results showed that only N has a significant effect (78.4%) on BOD5 removal. Folic acid had the greatest effect (42.7%) on TSS reduction. This is while folic acid had a significant effect (90.1%) only on increasing MLSS. The optimum conditions for microorganism activity consisted of a folic acid concentration of 0.2 ppm, an N concentration of 30 ppm, and a P concentration of 4 ppm . Interactions between first level of folic acid×second level of P on turbidity reduction, second level of folic acid×second level of P on BOD5 reduction, second level of N×second level of P on TSS reduction, and first level of N×first level of P on increasing MLSS were highly significant. These results show that adding folic acid, N, and P to the effluent from Tabriz Petrochemical Plant not only enhances the growth of microorganisms but also leads to the improvement of the treated effluent for discharge into the environment
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
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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