21978 research outputs found
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International Wire Services Coverage of Climate Change or Global Warming, 2004-2025 - July 2025
No full textThe Media and Climate Change Observatory Data monitors 131 sources (across newspapers, radio and TV) in 59 countries in seven different regions around the world. Data is assembled by accessing archives through the Lexis Nexis, Proquest and Factiva databases via the University of Colorado libraries. More information may be found at: http://mecco.colorado.edu.</p
North American Newspaper Coverage of Climate Change or Global Warming, 2000-2025 - July 2025
No full textThe Media and Climate Change Observatory Data monitors 131 sources (across newspapers, radio and TV) in 59 countries in seven different regions around the world. Data is assembled by accessing archives through the Lexis Nexis, Proquest and Factiva databases via the University of Colorado libraries. More information may be found at: http://mecco.colorado.edu.</p
International Wire Services Coverage of Climate Change or Global Warming, 2004-2025 - June 2025
No full textThe Media and Climate Change Observatory Data monitors 131 sources (across newspapers, radio and TV) in 59 countries in seven different regions around the world. Data is assembled by accessing archives through the Lexis Nexis, Proquest and Factiva databases via the University of Colorado libraries. More information may be found at: http://mecco.colorado.edu.</p
Japanese Newspaper Coverage of Climate Change or Global Warming, 2000-2025 - June 2025
No full textThe Media and Climate Change Observatory Data monitors 131 sources (across newspapers, radio and TV) in 59 countries in seven different regions around the world. Data is assembled by accessing archives through the Lexis Nexis, Proquest and Factiva databases via the University of Colorado libraries. More information may be found at: http://mecco.colorado.edu.</p
Norwegian Newspaper Coverage of Climate Change or Global Warming, 2000-2025 - June 2025
No full textThe Media and Climate Change Observatory Data monitors 131 sources (across newspapers, radio and TV) in 59 countries in seven different regions around the world. Data is assembled by accessing archives through the Lexis Nexis, Proquest and Factiva databases via the University of Colorado libraries. More information may be found at: http://mecco.colorado.edu.</p
United Kingdom Newspaper Coverage of Climate Change or Global Warming, 2000-2025 - June 2025
No full textThe Media and Climate Change Observatory Data monitors 131 sources (across newspapers, radio and TV) in 59 countries in seven different regions around the world. Data is assembled by accessing archives through the Lexis Nexis, Proquest and Factiva databases via the University of Colorado libraries. More information may be found at: http://mecco.colorado.edu.</p
Regulation of gratitude signals: The influence of gratitude expressions, sharing, and perceptions of authenticity
Get PDFResearch suggests that gratitude expressions are signals used in cooperative settings,communicating a sense of value, receipt of a benefit, and intentions to reciprocate. The currentstudy explores mechanisms regulating the honesty of gratitude expressions. Participants played aversion of the dictator game over three rounds. In round one, participants were “randomlyassigned” to be the decision-maker. In round two, another “player” (a confederate) was the“decision maker”, where I manipulated the confederate's behavior using a 2 (neutral expressionvs gratitude expression) X 2 and sharing (non-generous vs generous) experimental design. Inround three, participants were the decision maker again, and the key outcome variable was thechange in sharing from round one to round three. Negative values indicated increases incooperation while positive values indicated withdraw of cooperation. Results show there was asignificant effect of sharing; when confederates shared generously, participants were morecooperative. There was no significant effect of the gratitude expression, nor was there asignificant interaction. Self-report measures of subjects’ perceived authenticity, gratitude,closeness, liking, willingness to accept, befriend, and invite the other player were obtainedfollowing the game.</p
Optimization of X-ray Computed Tomography for Water Pipe Scales
Get PDFHuman exposure to lead is associated with a myriad of negative health effects. However, as there are millions of lead service lines (LSLs) still providing drinking water, lead contamination poses a major public health concern, especially in historically marginalized communities. Recent revisions to the Lead and Copper Rule (LCRR) have lowered the allowable lead threshold, one that many water utility companies will fail to comply with. Pipe scales are materials that form at the interface of lead and drinking water as chemicals and minerals in the water react with the corroding pipes. As these scales are essential to passivating the pipe walls, understanding their formation processes and interactions with corrosion control treatments (CCTs) is crucial to ensuring public health. Though CCTs have developed through decades of experimental treatment and sampling, the lack of understanding surrounding the mechanisms behind scale formation and lead release hinders their design and analysis. Furthermore, traditional pipe scale analysis techniques fail to provide a 3D microstructural analysis and require an intensive and error-prone sample preparation process. In this thesis, the application of X-ray Computed Tomography (XCT) to water pipe scale analysis is investigated and optimized. A Deep Learning model was developed for automatic segmentation, enabling the analysis of structural features and phase distribution. In addition to aiding in the development of better CCTs, this pipe scale analysis technique could improve the standard procedure currently used by the EPA and water utility companies as it is highly accurate, less labor intensive, and less prone to sampling errors. </p
Quantifying the Transit Light Source Effect: Measurements of Spot Temperature and Coverage on the Photosphere of AU Microscopii with High-resolution Spectroscopy and Multicolor Photometry
Get PDFAU Microscopii (AU Mic) is an active 24 ± 3 Myr pre-main-sequence M dwarf in the stellar neighborhood (d = 9.7 pc) with a rotation period of 4.86 days. The two transiting planets orbiting AU Mic, AU Mic b and c, are warm sub-Neptunes on 8.5 and 18.9 day periods and are targets of interest for atmospheric observations of young planets. Here we study AU Mic’s unocculted starspots using ground-based photometry and spectra in order to complement current and future transmission spectroscopy of its planets. We gathered multicolor Las Cumbres Observatory (LCO) 0.4 m SBIG photometry to study the star's rotational modulations and LCO Network of Robotic Echelle Spectrographs high-resolution spectra to measure the different spectral components within the integrated spectrum of the star, parameterized by three spectral components and their coverage fractions. We find AU Mic’s surface has at least two spectral components: a Tamb = K ambient photosphere and cool spots that have a temperature of Tspot = K, covering a globally averaged area of 39% ± 4% which increases and decreases by 5.1% ± 0.3% from the average throughout a rotation. We also detect a third flux component with a filling factor less than 0.5% and a largely uncertain temperature between 8500 and 10,000 K that we attribute to flare flux not entirely omitted when time averaging the spectra. We include measurements of spot characteristics using a two-temperature model, which we find agree strongly with the three-temperature results. Our expanded use of various techniques to study starspots will help us better understand this system and may have applications for interpreting the transmission spectra for exoplanets transiting stars of a wide range of activity levels.</p
The Influence of Feedback from Aptitude Tests on Students’ Academic Self-Perception
Get PDFWomen remain the minority in science, technology, engineering, and math (STEM), consequently influencing their academic self-perceptions. Research by Emma Shaffer (2024) found that negative feedback following an MCDB aptitude test increased students’ expected effort in the class. This condition lowered anticipated procrastination, sense of belonging, and self-efficacy, especially for female participants. The present study extended Shaffer’s research by modifying both feedback conditions, with wording that emphasizes support and the ability to learn. A "fixed mindset" has been shown to align with a helpless response, while a “growth mindset” can promote resilience and more positive academic self-perceptions (Dweck & Leggett, 1988). This study hypothesized that there would be no significant differences between the three conditions- low, high, or no feedback- because the growth mindset wording would neutralize the expected procrastination, effort, self-efficacy, belonging, and grade for all participants. 494 University of Colorado Boulder students took a pre-test for a hypothetical class, received randomized feedback, read a syllabus, and reported their predicted academic self-perceptions. The effects of the feedback conditions differed across conditions, with no feedback condition consistently leading to better self-perceptions. The low feedback resulted in the highest expected level of effort and highest expected grade, compared to no and high feedback. Additional research is needed by professors in college courses to prove that aptitude tests with growth mindsets or with no feedback can help inform the professor where there is room for growth and inspire students to correlate more effort in a class to better academic self-perceptions</p
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