1,721,007 research outputs found
CPMA-SP2 Wildfire smoke data
No full text<div>
<h1>Datasets for "Comparison of the LEO and CPMA-SP2 techniques for black-carbon mixing-state measurements"</h1>
<a href="https://github.com/ArashNaseri/Wildfire-dataset#datasets-for-comparison-of-the-leo-and-cpma-sp2-techniques-for-black-carbon-mixing-state-measurements"></a></div>
<div>
<h2>Paper Details</h2>
<a href="https://github.com/ArashNaseri/Wildfire-dataset#paper-details"></a></div>
<ul>
<li><strong>Title:</strong> Comparison of the LEO and CPMA-SP2 techniques for black-carbon mixing-state measurements</li>
<li><strong>Authors:</strong> Arash Naseri, Joel C. Corbin, Jason S. Olfert</li>
<li><strong>Affiliation:</strong>
<ul>
<li>Department of Mechanical Engineering, University of Alberta, Edmonton, Alberta, Canada</li>
<li>Metrology Research Centre, National Research Council Canada, Ottawa, Ontario, Canada</li>
</ul>
</li>
<li><strong>Correspondence:</strong> Arash Naseri (<a href="mailto:[email protected]">[email protected]</a>)</li>
<li><strong>Accepted:</strong> 2 April 2024</li>
<li><strong>Published:</strong> [Date]</li>
</ul>
<div>
<h2>Purpose</h2>
<a href="https://github.com/ArashNaseri/Wildfire-dataset#purpose"></a></div>
<p>The purpose of providing these datasets is to enhance clarity and reproducibility of the results presented in the paper. By making the data available, we aim to facilitate further research, enable verification of our findings, and support transparency in the scientific process.</p>
<div>
<h2>Measurement Details</h2>
<a href="https://github.com/ArashNaseri/Wildfire-dataset#measurement-details"></a></div>
<ul>
<li><strong>Location:</strong> Kamloops, British Columbia, Canada (50°39'58.4"N, 120°21'45.5"W)</li>
<li><strong>Nearby Air Quality Station:</strong> 2.2 km away</li>
<li><strong>Nearby Highway:</strong> 0.7 km from the Trans-Canada highway</li>
<li><strong>Experiment Dates:</strong> 21 and 22 July 2021</li>
</ul>
<div>
<h2>Dataset Descriptions</h2>
<a href="https://github.com/ArashNaseri/Wildfire-dataset#dataset-descriptions"></a></div>
<div>
<h3>Case I</h3>
<a href="https://github.com/ArashNaseri/Wildfire-dataset#case-i"></a></div>
<ul>
<li><strong>Time Period:</strong> 21 July, 11:54 to 13:44 LT</li>
<li><strong>PM2.5 Concentrations:</strong> 1.7 to 4 μg/m³</li>
<li><strong>Description:</strong> Low concentrations of mostly thinly coated rBC particles, presumably due to urban and highway emissions, and possibly some wildfire smoke.</li>
</ul>
<div>
<h3>Case II</h3>
<a href="https://github.com/ArashNaseri/Wildfire-dataset#case-ii"></a></div>
<ul>
<li><strong>Time Period:</strong> 22 July, 11:31 to 12:41 LT</li>
<li><strong>PM2.5 Concentrations:</strong> 10 to 81 μg/m³</li>
<li><strong>Description:</strong> Moderate concentrations with a mixture of thinly and thickly coated rBC particles due to urban emissions and nearby forest fires.</li>
</ul>
<div>
<h3>Case III</h3>
<a href="https://github.com/ArashNaseri/Wildfire-dataset#case-iii"></a></div>
<ul>
<li><strong>Time Period:</strong> 22 July, 10:23 to 11:29 LT</li>
<li><strong>PM2.5 Concentrations:</strong> 122 to 104 μg/m³</li>
<li><strong>Description:</strong> High concentrations with mostly thickly coated rBC particles due to wildfire smoke.</li>
</ul>
<div>
<h2>Code Availability</h2>
<a href="https://github.com/ArashNaseri/Wildfire-dataset#code-availability"></a></div>
<p>The MATLAB code used to generate the CPMA-SP2 results is publicly available at <a href="https://github.com/tsipkens/bidias">https://github.com/tsipkens/bidias</a>. This code is specifically designed to invert tandem aerosol measurments, particularly in this paper CPMA-SP2 measurements to find two-dimensional size distributions.</p>
<p>For generating SP2-LEO and Lagtime analysis, the SP2 toolkit version 4.118 was used. This toolkit is also publicly accessible and can be found at <a href="../records/3575186" rel="nofollow">https://zenodo.org/records/3575186</a>.</p>
<p><strong>Schwarz, J.P., & Gao, R.S. (2019).</strong><br>SP2 toolkit 4.118. Zenodo repository. Available at <a href="../records/3575186" rel="nofollow">https://zenodo.org/records/3575186</a>. Last accessed 2024-05-27.</p>
Particle Number Emission Indices from In-flight Aircraft
Get PDFTo reduce CO2 emissions, the aviation industry has begun looking into alternative biofuels as a replacement for conventional fossil-fuel based jet fuel. Although biofuels may reduce aircraft CO2 emissions, it is also important to consider how other emissions are effected such as particle emissions. Aircraft particle emissions have been studied extensively in the lab or on the ground with stationary aircrafts or test engine cells with few studies measuring emissions from aircraft in-flight. To study in-flight particle emissions, the National Research Council of Canada has equipped a measurement aircraft with condensation particle counters and a catalytic denuder to measure both non-volatile and total (volatile and non-volatile) particles. Two separate flight campaigns were undertaken to collect emissions data from aircrafts in-flight.
The Civil Aviation Alternate Fuels Contrail and Emissions Research (CAAFCER) campaign involved the sampling of Air Canada Airbus A320 aircrafts during commercial flights. Two A320 aircraft equipped with CFM56-5A1 engines burning Jet A1 and a 43% hydrotreated esters and fatty acids (HEFA)/Jet A1 blend and another aircraft with CFM56-5B4/P engines burning Jet A1 were sampled. It was found that the particle number emission indices were similar amongst the tested engines and fuel types. The total particle emission index for particles greater than 7.7 nm ranged between 1.44 × 1017 to 2.17 × 1017 particles per kg of fuel, the total particle emission index for particles greater than 15.4 nm ranged between 1.73 × 1016 to 4.73 × 1016 kg-1, and the non-volatile particle emission index for particles greater than 13.3 nm ranged from 3.55 × 1015 to 6.76 × 1015 kg-1.
In the Civil Aviation Alternate Fuels Contrails and Emissions with high Blend Biojet (CAAFCEB) campaign, the Falcon 20 research aircraft was sampled in-flight while fueled with an ethanol-based (ATJ) biofuel, JP-5 fuel and Jet A1 fuel. The objective of this flight campaign was to compare the particle emissions of the ATJ and JP-5 fuels to Jet A1 fuel. The total particle emissions for the JP-5 were found to be slightly larger than Jet A1 fuel with the total particle emissions for the JP-5 fuel being 1.29 to 1.52 times larger than for Jet A1. The ATJ biofuel on the other hand was found to significantly reduce total particle number emissions by up to 91% and non-volatile particle number emissions by 96% compared to Jet A1 fuel
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
Repeatability and Intermediate Precisions of the CPMA-Electrometer System
Get PDFThe centrifugal particle mass analyzer (CPMA)-electrometer system has been proposed as an alternative method of calibration for devices that measure black carbon. This system is proposed to replace the current calibration standard of NIOSH 5040. The repeatability and intermediate precision of the CPMA-electrometer was determined through a series of experiments that examined an individual components of the system to determine the overall expected level of variation of the system. The key measurement components of this measurement system include the CPMA, a Faraday cup, an electrometer and a flow controller. These devices work together to classify a charged aerosol for a specific mass to charge ratio, capture the charge, and measure the current flow. Two devices were compared to a known standard, the electrometer and the flow controller. Though these tests it was found the flow controller had an accuracy of less than 1%, a repeatability of less than 0.4% and an M=2 intermediate precision of 0.3% while the electrometer has a bias error of 2%. The Faraday cups were testing using the two Faraday cup-electrometer systems in parallel. Measurements were collected on both devices simultaneously where the repeatability was found to be less than 0.8% for the majority of tests, and an M=2intermediate precision of 2.2%. The CPMA was tested using a tandem CPMA-CPMA experiment where one device classified the particles to a known set point and the second device scanned across a range of values to determine the peak value. Data was normalized by the initial set point on the first device. Through this it was found the CPMA had an average repeatability of 0.8% while the M=2 intermediate precision was 1.3%. Using these intermediate precisions an estimate of the overall systems intermediate precision was calculated as 2.6%. Tests were also conducted on the CPMA-electrometer system where comparison measurements were collected on a challenge instrument. Between measurements that were collected across a number of days it was found a repeat calibration tests were likely to have less than 5% variation, a great improvement over NIOSH 5040 and a comparable result to the calculated intermediate precision
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
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
- …
