1,720,980 research outputs found
Reducing air pollution and occupational health risk using palm olein abrasive blasting for metal surface cleaning applications
No full textAbrasive blasting process done for surface cleaning which has two methods which are dry or wet process. The dry process which uses abrasive media blasted onto a surface to clean the surface normally will release fine dust into the environment. Water used with abrasive media to reduce the dust release into the environment; named as wet abrasive blasting. However, water causes corrosion to metal surface. In this study, analysis of refined, bleached and de-odorized (RBD) palm olein as an alternative to the use of water in wet abrasive blasting process will be investigated. The analysis in this study covers personal dust exposure reduction, emission rate reduction and corrosion inhibition. In this research, abrasive blasting workers’ exposure level to the dust release from abrasive blasting activity will be determined using NIOSH Method. EPA-42 will be used to determine the emission rate. XRD, ICP-MS and SEM also will be used to determine the dust and material composition. To see the effectiveness of the RBD palm olein as a corrosion inhibitor, samples of metal surface will be tested using ASTM method. For the expected results, the quality of RBD palm olein expected to show similar result to dry and wet abrasive blasting in cleaning performance. Exposure monitoring result expected to show that the workers’ exposure to dust release from RBD palm olein abrasive blasting reduced the respirable and inhalable dust compared to the result recorded in dry abrasive blasting
Evaluation on effect of abrasive blasting media to the environment and human safety and health
No full textAbrasive blasting is one of the methods available for cleaning and finishing for materials using abrasive media towards the workpiece. These include surface cleaning of steels, bricks and concrete. This method is favorable due to fast process and high quality for coating process which increase its efficiency and productivity. However, sand blasting produces significant noise and vibrations, and an effluent cloud consisting of dust, waste sands and contaminants which considered safety risks to on-site personnel and hazardous to surrounding environment. Also, the abrasive blasting requires high working pressure for blasting and be conducted in a controlled working space environment. Since the sand blasting particles are small, and the failure of some workers to abide tight regulation, has made the workers prone to health and safety problems. This research aims to evaluate the effect of abrasive blasting and its processes towards the environment and also human's health and safety. This research is divided into three main areas. The first method assess the process of sand blasting. Some industries are evaluated for chemical hazard risk assessment, of which will be compared with the guidelines under Malaysia legislation body. The second approach will analyse the materials used for sand blasting. These include the blasting media and also parts to be blasted. The chemical compositions and geometry before and after blasting processes will be evaluated in respect of human safety and health..
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
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