1,720,977 research outputs found
Supplementary data for "Trajectories of long duration balloons launched from McMurdo Station in Antarctica"
No full textThe data.csv.zip folder consists of 40 trajectory files for long-duration balloon flights launched from McMurdo Station in Antarctica, each containing latitude, longitude, altitude and time since launch. The files in analysis.csv.zip contain data products derived from analysis of the raw data.These files contain trajectory information for long-duration balloons launched from McMurdo Station in Antarctica. These balloons carry payloads addressing a wide range of scientific questions. We have analyzed these trajectories in order to estimate the expected range of trajectories to aid in mission planning for future balloon experiments from McMurdo.Geach, Christopher; Hanany, Shaul; Tan, Chiou Yang; Tan, Xin Zhi. (2020). Supplementary data for "Trajectories of long duration balloons launched from McMurdo Station in Antarctica". Retrieved from the University Digital Conservancy, https://doi.org/10.13020/hg6n-8f95
Supplementary data for "The PMC Turbo balloon mission to measure gravity waves and turbulence in Polar Mesospheric Clouds: Camera, telemetry, and software performance"
No full textThere are three separate files containing images from PMC Turbo cameras during its flight in July 2018. Image data were taken aboard the PMC Turbo instrument described in Fritts et al. (2019) "PMC Turbo: Studying Gravity Wave and Instability Dynamics in the Summer Mesosphere Using Polar Mesospheric Cloud Imaging and Profiling From a Stratospheric Balloon," https://doi.org/10.1029/2019JD030298.The Polar Mesospheric Cloud Turbulence (PMC Turbo) instrument consists of a balloon-borne platform which hosts seven cameras and a Rayleigh lidar. During a six-day flight in July 2018, the cameras captured images of Polar Mesospheric Clouds (PMCs) with a sensitivity to spatial scales from ~20 m to 100 km at a ~2-s cadence and a full field of view (FOV) of hundreds of kilometers. We developed software optimized for imaging of PMCs, controlling multiple independent cameras, compressing and storing images, and for choosing telemetry communication channels. We give an overview of the PMC Turbo design focusing on the flight software and telemetry functions. We describe the performance of the system during its first flight in July 2018. The images uploaded here support the paper in demonstrating the performance of the PMC Turbo instrument.NASA 80NSSC18K0050NASA 80NSSC20K0178Kjellstrand, Carl B; Jones, Glenn; Geach, Christopher P; Williams, Bifford P; Fritts, David C; Miller, Amber D; Hanany, Shaul; Limon, Michele; Reimuller, Jason. (2020). Supplementary data for "The PMC Turbo balloon mission to measure gravity waves and turbulence in Polar Mesospheric Clouds: Camera, telemetry, and software performance". Retrieved from the University Digital Conservancy, https://doi.org/10.13020/df2m-a470
Balloon-borne Imaging of Polar Mesospheric Clouds
No full textPolar Mesospheric Clouds, or PMCs, are the highest forming clouds observed on Earth, forming about 80 kilometers above the polar surfaces during local summers. Due to their height, they are difficult to observe from either ground or space. In early 2013, EBEX, a balloon-borne cosmological experiment that flew over Antarctica for 11 days, serendipitously observed PMCs using its onboard star cameras. Because of the proximity of EBEX to the PMCs, and the high resolution of the star cameras, the captured images had an unprecedentedly small spatial resolution. However, the captured images also contained undesirable artifacts, such as dust spots, image gradients, and other similar pathologies. Several post-hoc techniques were developed to remedy these problems and restore the images.This research was supported by the Multicultural Summer Research Opportunities Program (MSROP) and the NorthStar Stem Alliance.Angulo-Umaña, Pedro; Hanany, Shaul; Geach, Christopher. (2018). Balloon-borne Imaging of Polar Mesospheric Clouds. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/200791
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
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