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Tracks on the trail: Popular music, race, and the US presidency
No full textFrom Bill Clinton playing his saxophone on The Arsenio Hall Show to Barack Obama referencing Jay-Z\u27s song Dirt Off Your Shoulder, politicians have used music not only to construct their personal presidential identities but to create the broader identity of the American presidency. Through music, candidates can appear relatable, show cultural competency, communicate values and ideas, or connect with a specific constituency. On a less explicit level, episodes such as Clinton\u27s sax-playing and Obama\u27s shoulder brush operate as aural and visual articulations of race and racial identity. But why do candidates choose to engage with race in this manner? And why do supporters and detractors on YouTube and the Twittersphere similarly engage with race when they create music videos or remixes in homage to their favorite candidates? With Barack Obama, Ben Carson, Kamala Harris, and Donald Trump as case studies, Tracks on the Trail: Popular Music, Race, and the US Presidency sheds light on the factors that motivate candidates and constituents alike to articulate race through music on the campaign trail and shows how the racialization of sound intersects with other markers of difference and ultimately shapes the public discourse surrounding candidates, popular music, and the meanings attached to race in the 21st century. Gorzelany-Mostak explores musical engagement broadly, including official music in the form of candidate playlists and launch event setlists, as well as unofficial music in the form of newly composed campaign songs, mashups, parodies, and remixes
Synthesis and Thermal Oxidation Resistance of Boron-Rich Boron–Carbide Material
No full textA boron-rich boron–carbide material (B4+δC) was synthesized by spark plasma sintering of a ball-milled mixture of high-purity boron powder and graphitic carbon at a pressure of 7 MPa and a temperature of 1930 °C. This high-pressure, high-temperature synthesized material was recovered and characterized by X-ray diffraction, X-ray photoelectron spectroscopy, Raman spectroscopy, Vickers hardness measurements, and thermal oxidation studies. The X-ray diffraction studies revealed a single-phase rhombohedral structure (space group R-3m) with lattice parameters in hexagonal representation as a = 5.609 ± 0.007 Å and c = 12.082 ± 0.02 Å. The experimental lattice parameters result in a value of δ = 0.55, or the composition of the synthesized compound as B4.55C. The high-resolution scans of boron binding energy reveal the existence of a B-C bond at 188.5 eV. Raman spectroscopy reveals the existence of a 386 cm−1 vibrational mode representative of C-B-B linear chain formation due to excess boron in the lattice. The measured Vickers microhardness at a load of 200 gf shows a high hardness value of 33.8 ± 2.3 GPa. Thermal gravimetric studies on B4.55C were conducted at a temperature of 1300 °C in a compressed dry air environment, and its behavior is compared to other high-temperature ceramic materials such as high-entropy transition metal boride. The high neutron absorption cross section, high melting point, high mechanical strength, and thermal oxidation resistance make this material ideal for applications in extreme environments
Characterization of algal community composition and structure from the nearshore environment, Lake Tahoe (United States)
No full textPeriphyton assemblages from the nearshore environment of the west (California) side of Lake Tahoe, were analyzed to determine their taxonomic composition and community structure across habitats and seasons. Lake Tahoe is the second deepest lake in the US and an iconic oligotrophic subalpine lake with remarkable transparency. It has experienced offshore cultural eutrophication since the 1960s with observations of nuisance nearshore algal growth since the mid 2000s attributed to anthropogenic stressors. Samplings from November 2019–September 2020 provide useful snapshots against which older monitoring may be contextualized. A voucher flora, complete with descriptions, photo-documentation and referencing to species concepts employed, was created as a method of providing reproducible identification and enumeration of algal species, and more seamless reconciliation of detailed taxonomic data with future monitoring projects. The eulittoral zone (0–2 m) is seasonally dominated by elongate araphid (Synedra, Ulnaria) and stalked or entubed diatoms (Gomphonema, Cymbella, Encyonema). The sublittoral zone (\u3e2 m) is dominated by a nitrogen-fixing Epithemia-cyanobacteria assemblage with less seasonal changes in dominance and composition that expanded to impinge on the 2 m depths of the eulittoral zone in the Fall. Sublittoral epipsammic samples, despite their proximity to rocks, had a very distinct diatom composition and high species dominance, similar to what was seen in the Fall eulittoral samples, with high numbers of Staurosirella chains and small biraphid diatoms. The deeper samples at 30 and 50 m contained high numbers of live Epithemia, and indicate a thriving sublittoral assemblage at these greater depths, but with less biomass. The 2019–20 data show many of the same diatom taxa observed in the 1970’s and 1980’s but with changes in species dominance. Notably, there was less of the green alga Mougeotia, when compared to the 1970’s data, and a higher dominance by nitrogen fixing Epithemia in the sublittoral zone, persisting year-round. These new data show roughly double the algal species biodiversity that had been documented previously in the Lake Tahoe nearshore, and is largely attributed to the methods employed. Adopting these new methods in future monitoring efforts should improve harmonization of taxonomic data and help advance our knowledge of the contributions to nearshore cultural eutrophication
The high energy X-ray probe (HEX-P): Resolving the nature of Sgr A* flares, compact object binaries and diffuse X-ray emission in the Galactic center and beyond
No full textHEX-P is a probe-class mission concept that will combine high spatial resolution X-ray imaging ((Formula presented.) FWHM) and broad spectral coverage (0.2–80 keV) with an effective area far superior to current facilities’ (including XMM-Newton and NuSTAR). These capabilities will enable revolutionary new insights into a variety of important astrophysical problems. We present scientific objectives and simulations of HEX-P observations of the Galactic Center (GC) and Bulge. We demonstrate the unique and powerful capabilities of the HEX-P observatory for studying both X-ray point sources and diffuse X-ray emission. HEX-P will be uniquely equipped to explore a variety of major topics in Galactic astrophysics, allowing us to 1) investigate broad-band properties of X-ray flares emitted from the supermassive black hole (BH) at Sgr A* and probe the associated particle acceleration and emission mechanisms; 2) identify hard X-ray sources detected by NuSTAR and determine X-ray point source populations in different regions and luminosity ranges; 3) determine the distribution of compact object binaries in the nuclear star cluster and the composition of the Galactic Ridge X-ray emission; 4) identify X-ray transients and measure fundamental parameters such as black hole spin; 5) find hidden pulsars in the Galactic Center; 6) search for BH–OB binaries and hard X-ray flares from young stellar objects in young massive clusters; 7) measure white dwarf (WD) masses of magnetic CVs to deepen our understanding of CV evolution and the origin of white dwarf magnetic fields; 8) explore primary particle accelerators in the GC in synergy with future TeV and neutrino observatories; 9) map out cosmic-ray distributions by observing non-thermal X-ray filaments; 10) explore past X-ray outbursts from Sgr A* through X-ray reflection components from giant molecular clouds
The World Amphipoda Database: History and Progress
No full textWe provide an overview of the World Amphipoda Database (WAD), a global species database that is part of the World Register of Marine Species (WoRMS). Launched in 2013, the database contains entries for over 10,500 accepted species names. Edited currently by 31 amphipod taxonomists, following WoRMS priorities, the WAD has at least one editor per major group. All accepted species are checked by the editors, as is the authorship available for all of the names. The higher classification is documented for every species and a type species is recorded for every genus name. This constitutes five of the 13 priorities for completion, set by WoRMS. In 2015, five LifeWatch grants were allocated for WAD activities. These included a general training workshop in 2016, together with data input for the superfamily Lysianassoidea and for a number of non-marine groups. Philanthropy grants in 2019 and 2021 covered more important gaps across the whole group. Further work remains to complete the linking of unaccepted names, original descriptions, and environmental information. Once these tasks are completed, the database will be considered complete for 8 of the 13 priorities, and efforts will continue to input new taxa annually and focus on the remaining priorities, particularly the input of type localities. We give an overview of the current status of the order Amphipoda, providing counts of the number of genera and species within each family belonging to the six suborders currently recognized
Attitudes about Rehabilitation among Jail Correctional Officers
No full textThere are few studies that focus on jail correctional officers’ views. We surveyed officers in thirteen Florida county jails and examine the impact of personal characteristics and officer attitudes on rehabilitation attitudes, as well as differences in rehabilitative attitudes across jails. Results indicate female, nonwhite, more religious, less conservative officers, and those more satisfied with their job were more likely to support rehabilitation, while those who preferred more social distance were less likely to. Results also reveal significant differences in support for rehabilitation between jails. This study confirms that findings regarding prison officers are consistent with those for jail officers
NCHA variable combination as a method to undertake LGBTQ + student subpopulation analyses
No full textObjectiveCombine National Collegiate Health Assessment (NCHA) measures indicating LGBTQ + membership into a single variable in order to analyze health responses of this group as compared to their cisgender, heterosexual (cis-het) peers. Participants: Students at a liberal arts university who completed the Spring 2019 NCHA-II study (n = 1107). Methods: Four different NCHA sexual orientation and gender identification variables were combined, creating a new variable to examine the campus LGBTQ + student sub-sample as a single, complete group. That group was then compared to cis-het students across multiple variables. Results: LGBTQ + students reported statistically significant differences for key variables such as suicide attempts, suicidal ideation, and self-harm, as well as for stressors that impact academic success such as discrimination. Conclusions: This analysis indicates that the challenges campus LGBTQ + students face are much different than their cis-het peers. Support from campus community members is suggested to reduce negative impacts for these students
Characterization of algal community composition and structure from the nearshore environment, Lake Tahoe (United States)
No full textPeriphyton assemblages from the nearshore environment of the west (California) side of Lake Tahoe, were analyzed to determine their taxonomic composition and community structure across habitats and seasons. Lake Tahoe is the second deepest lake in the US and an iconic oligotrophic subalpine lake with remarkable transparency. It has experienced offshore cultural eutrophication since the 1960s with observations of nuisance nearshore algal growth since the mid 2000s attributed to anthropogenic stressors. Samplings from November 2019-September 2020 provide useful snapshots against which older monitoring may be contextualized. A voucher flora, complete with descriptions, photo-documentation and referencing to species concepts employed, was created as a method of providing reproducible identification and enumeration of algal species, and more seamless reconciliation of detailed taxonomic data with future monitoring projects. The eulittoral zone (0-2 m) is seasonally dominated by elongate araphid () and stalked or entubed diatoms (). The sublittoral zone (\u3e2 m) is dominated by a nitrogen-fixing -cyanobacteria assemblage with less seasonal changes in dominance and composition that expanded to impinge on the 2 m depths of the eulittoral zone in the Fall. Sublittoral epipsammic samples, despite their proximity to rocks, had a very distinct diatom composition and high species dominance, similar to what was seen in the Fall eulittoral samples, with high numbers of chains and small biraphid diatoms. The deeper samples at 30 and 50 m contained high numbers of live , and indicate a thriving sublittoral assemblage at these greater depths, but with less biomass. The 2019-20 data show many of the same diatom taxa observed in the 1970\u27s and 1980\u27s but with changes in species dominance. Notably, there was less of the green alga , when compared to the 1970\u27s data, and a higher dominance by nitrogen fixing in the sublittoral zone, persisting year-round. These new data show roughly double the algal species biodiversity that had been documented previously in the Lake Tahoe nearshore, and is largely attributed to the methods employed. Adopting these new methods in future monitoring efforts should improve harmonization of taxonomic data and help advance our knowledge of the contributions to nearshore cultural eutrophication
Cryptocurrencies in accounting schools?
No full textPurpose: This study aims to investigate the extent to which newly certified public accountants (CPAs) and accounting graduate students possess a comprehensive understanding of cryptocurrencies and the skills they have acquired throughout their education. Design/methodology/approach: A qualitative analysis was used through semi-structured interviews to obtain an in-depth insight into cryptocurrencies, which could not be investigated easily through quantitative methods, and to provide an understanding of the context for cryptocurrencies from CPA and non-CPA students\u27 points of view. This was in addition to focusing on understanding the differences between the students\u27 thoughts. Findings: This study found that recent accounting graduates and CPA members have the least awareness of cryptocurrencies, likely due to a lack of professors\u27 comprehension or exposure to the concept. However, students involved in forensic courses provided more information about cryptocurrencies compared with other students. Research limitations/implications: The data are limited to only a single country. Given that cryptocurrencies are a relatively new notion in accounting, there is an alarming lack of legislation. Further, the authors found that recent accounting graduates and CPAs had the same level of knowledge of cryptocurrencies, most probably due to a lack of exposure during their education and academics\u27 limited understanding of the concept. Practical implications: The students\u27 differing answers about cryptocurrencies show differences in their current level of understanding of cryptocurrencies. Originality/value: This study has identified that the vast majority of accounting graduates lack adequate knowledge about cryptocurrencies or access to adequate resources, despite understanding the fundamental concepts of cryptocurrency