The Baryonic Tully-Fisher Relation. II. Stellar Mass Models

We present new color-ϒ* (mass-to-light ratio) models to convert Wide-field Infrared Survey Explorer W1 fluxes into stellar masses. We outline a range of possible star formation histories and chemical evolution scenarios to explore the confidence limits of stellar population models on the value of ϒ*. We conclude that the greatest uncertainties (around 0.1 dex in ϒ*) occur for the bluest galaxies with the strongest variation in recent star formation. For high-mass galaxies, the greatest uncertainty arises from the proper treatment of bulge-disk separation in which to apply different ϒ* relations appropriate for those differing underlying stellar populations. We compare our deduced stellar masses with those deduced from Spitzer Space Telescope 3.6 μm fluxes and stellar mass estimates in the literature using optical photometry and different ϒ* modeling. We find the correspondence to be excellent, arguing that rest-frame near-IR photometry is still more advantageous than other wavelengths

Non-Finite Clause Use in Disciplinary Research Writing: A Formulaic Sequence-Based Functional Comparison Between Expert and Student Writers

Non-finite clauses (NFCs), despite their increasingly recognized role in second language (L2) acquisition and academic writing as part of a multidimensional conceptualization of syntactic complexity, have not been analyzed in functional and discipline-specific perspectives. This study addresses this gap by providing a linguistic-descriptive account of NFC use in expert and advanced student English research writing. Using a 2.26-million-word corpus of published research articles and student manuscripts in Agricultural Science, this study profiles the distribution of NFC subtypes and identifies frequent discoursal functions realized by non-finite verb-centered formulaic sequences. The findings reveal significant differences in NFC use across writer groups, with student writers utilizing NFCs less overall and in the majority of structural subtypes. Functional analyses further demonstrate that advanced student writers employed a narrower range of formulaic frames for a narrower range of discoursal functions, highlighting both a reduced lexical repertoire and a rhetorically less sophisticated style, in regard to NFCs. Findings underscore the importance of considering a full range of lexical/phraseological and discourse-functional patterns of clause-level linguistic features, such as NFCs, in order to gain a more pedagogically interpretable understanding of syntactic complexity in L2 and academic writing

Understanding Redox Organic Behavior in Deep Eutectic Solvents: Considerations for Molecular Design

Electrolytes based on deep eutectic solvents (DESs) coupled with redox active organic molecules have shown potential as a versatile and energy dense electrochemical energy storage system. However, progress in these systems has been held back by a lack of understanding of the irregular behavior displayed when redox active organic molecules are transitioned from other solvent systems. In this work, the hydrogen bonding characteristics of a series of redox organic molecules were investigated through infrared spectroscopy and molecular modeling. New understanding of these interactions was then used to explain their electrochemical behavior in a DES electrolyte. A model was used to predict the behavior of new derivatives towards the design of an optimized redox organic-DES system. Hydrogen bonding between the redox molecules and the solvent was found to significantly shift the potential of a redox reaction more positive when a hydrogen bond forms at the redox active site. It was predicted that functionalizing a molecule with electron withdrawing groups to lower the electron density of the redox active functional group lowers the strength of the hydrogen bond and thus alleviates the undesirable potential shift. This hypothesis was demonstrated by the addition of nitro groups to fluorenones

An Experimental Investigation on the Effect of Laser Energy Deposition in an Over-Expanded Jet

This experimental investigation focuses on understanding the influence of perturbations due to short-duration energy deposition on the shock train structure and flow dynamics in an axisymmetric over-expanded Mach 2.52 jet. The flow is perturbed by localized laser-induced breakdown at various locations within the jet, creating a shock wave and a high-temperature plasma zone in the shock train. A high-speed self-aligning focusing schlieren system is used to visualize the flow and characterize the shock train dynamics and the flow structure recovery process by measuring the distance to the first shock reflection point from the nozzle exit. The response of the jet flow is similar for cases with the perturbation at the nozzle exit and the pre-reflection point across a range of jet total pressures, but the response is qualitatively different when the perturbation occurs downstream of the first shock reflection in the jet, with the flow structures being forced upstream toward the nozzle. The frequency of the oscillations of the shock height is found to be the same for all cases, approximately 10 kHz, independent of the jet total pressure, laser energy, and deposition location. The oscillations reduce in magnitude over time, and the damping ratio for cases with the energy deposition at the pre-reflection point and nozzle exit is found to be nearly constant with respect to jet total pressure and deposition energy, varying within the range of 0.06–0.12, whereas it is dependent on the jet chamber pressure for the post-reflection case, varying from 0.07 to 0.14

Oceanic Wahhabism

At some point around 1810, a leading Wahhabi theologian in the capital of the First Saudi State fielded an intriguing question: Although Wahhabi leaders preached the ideals of enmity and violence toward non-Wahhabi peoples, could Wahhabi merchants travel to non-Wahhabi lands, do business with non-Wahhabi persons, and reside among them while pursuing commercial agend as? The theologian answered yes. I argue that this question and its answer reveal a lived reality in Najd that historians have yet to fully uncover. The theologian’s answer reveals how Arabia’s interior where Wah habismemerged was enmeshed alongside Arabia’s coasts within the broader Afro-Asian Indian Ocean world. Oceanic Wah habism thus situates Najd, the emergence of Wahhabism and the First Saudi State as parts of an interregional world in which Najdi peoples helped forge, consolidate, and sustain political, social, and commercial connections before and after Wahhabism’s emergence. An oceanic, world historical framework highlights individuals, agendas, and events that add new dynamics to the standard tribes-religion-oilframe work for studying Arabia and its history, and helps to continue uncovering a portrait of Arabia—interior and all—as integral to modern world history

Scholars and Changemakers: The Vital Role of Graduate Students in Campus Women\u27s Centers

On college campuses, Women’s Centers serve as a safe space for many marginalized students, faculty, and staff members across campus. These Centers are active spaces that serve a wide variety of individuals including graduate students who play multifaceted roles that are essential to the Center’s work. These students contribute significantly to the functioning of the Center while also gaining professional and personal development from their involvement. In this article, we reflect on our own experiences as two graduate students working within a campus-based Women’s Center while simultaneously integrating literature on the function of graduate students within these spaces. Employing a dual auto-ethnographic methodology, we engage in joint analysis and writing, arguing that graduate students are crucial members of Women’s Centers who benefit not only the students that utilize the Center, but also other staff, faculty, and the graduate students themselves

Innovative Instagram Education: A Tool to Prevent Relationship and Sexual Violence

During the 2024 Fall semester, at the McCluskey Center for Violence Prevention at the University of Utah, our team solidified an educational plan to create Instagram posts on topics related to relationship and sexual violence. The Instagram Educational Series Programming consists of weekly posts addressing the primary prevention of relationship and sexual violence on the @uofucvp Instagram. This educational series aims to break down research and complex ideas to make them accessible to a wider audience. The posts with the most engagement address more complex topics. People’s thinking starts to shift when we address topics in a way that is unique from the ways we traditionally talk about relationship and sexual violence prevention

Poor in Practical Capacity: How Environmental Alienation Is Really a Deficit of Political Know-How

“Alienation from nature” is a popular notion in Western environmental culture. Influential Anglophone critical theorist Steven Vogel claims that it makes no sense, unlike alienation from our productive capacity to dwell on Earth, called “alienation from the environment.” His criticism is accurate, but his view isn’t. The normative sets appropriate production and consists of social processes of arriving at norms. Politics is foremost among these processes, and it is fundamentally know-how. Given these assumptions, poor practical capacity ends up being the heart of “environmental alienation” – alienation from the built environment. Look at large-scale, anthropogenic, environmental change: a deficit of political know-how leaves people alienated from the planetary environment created by human engineering