University of Colorado Boulder

Constraints on NO x emission in Thailand using GEMS satellite data

Nitrogen oxides (NOx=NO+NO2) are key pollutants that contribute to ozone and secondary aerosol formation, posing environmental and health risks. Accurate simulation and forecasting of NO x pollution is essential for developing mitigation strategies. Local inventories in Thailand...

Plenty of fish in the sea, but only one multimodal feather star robot

A feather star–inspired soft swimming robot achieves multimodal 3D maneuverability with minimal actuation using a mechanically intelligent body design.

Being and Being This: Haecceity and the Univocal Concept of Being in Duns Scotus

Abstract Haecceity is often understood as a theoretical construct posited by Duns Scotus to explain individuation. This characterization is flawed in two ways: first, it lends haecceity an ad hoc appearance and obscures the fact that it is called for by Scotus’s most basic philos...

Polycentric governance of cruise environmental impacts

Rapidly growing cruise ship tourism in northern regions has been a double-edged phenomenon, bringing monetary benefits to otherwise limited economic futures but also undesirable environmental impacts such as air pollution, wastewater discharge, and noise. This paper examines resp...

Microphysics and Kinematics of a High Flash Rate Storm With a Bottom‐Heavy Charge Structure

Abstract An atypical thunderstorm with unusual lightning and charge structure characteristics propagated through Cordoba province, Argentina, during the austral warm season in late 2018. This storm exhibited echo tops near 10.5 km, with high lightning activity concentrated at low...

Discovery of a second-generation planet candidate accreting onto a white dwarf

Abstract Many white dwarfs accrete the debris of disrupted planetary bodies, detected in the form of metal enrichment in their atmospheres, dusty or gaseous circumstellar discs, and photometric transits from debris. The composition of accreted debris has been shown to be diverse...

A refinement of the McCreight-Meyer union theorem

Abstract Using properties of Blum complexity measures and certain complexity class operators, we exhibit a total computable and non-decreasing function $$t_\textsf{poly}$$ t poly such that for all k , $$\Sigma _k\textsf{P}= \Sigma _k\textsf{TIME}(t_\textsf{poly})$$ Σ k P = Σ k TI...

Projected environmental change relevant to whaling activities in Utqiaġvik, Alaska

The Arctic has experienced rapid change which is projected to continue through the 21st century. These environmental changes may impact traditional subsistence hunting activities including bowhead whale hunting. Here, we present the long term sea ice and wind changes over the 20t...

Caysichite-(Y) Ca4(Y,REE)4(Si8O20)(CO3)6·8H2O: Endmember Composition and Structure Established from New Occurrences Across Different Geologic Settings

Abstract The heavy rare earth element silicate-carbonate mineral caysichite-(Y) [Ca4(Y,REE)4(Si8O20)(CO3)6·8H2O] was discovered in the alkaline granite of the Golden Horn Batholith, near Washington Pass, Okanogan County, Washington, USA, as sub-millimeter euhedral orthorhombic pa...

Brain gray matter changes across chronic pain trajectories: MRI evidence from 35,000 individuals

ABSTRACT: Chronic pain affects brain gray matter structure, but the magnitude, pattern, and reversibility of brain changes upon pain recovery remain unclear because of inconsistent findings from small-scale studies. We analyzed data from 35,052 UK Biobank participants who complet...

Decoded Antarctic snow accumulation history reconciles observed and modeled trends in accumulation and large-scale warming patterns

Increased snow accumulation on the Antarctic Ice Sheet mitigated global sea level rise by ∼ 11 mm during 1901–2000 according to ice core reconstructions. However, in the most recent 40 years of more intense observation and warming, the trend in the Antarctic-wide accumulation rat...

Assessing ozone dynamics during the 2023 summer STAQS field campaign using synergistic observations and model simulations

NASA's Tropospheric Emissions: Monitoring of Pollution (TEMPO) geostationary satellite sensor provides high temporal and spatial resolution measurements critical for monitoring air quality. During the Synergistic TEMPO Air Quality Science (STAQS) component of the 2023 AGES+ campa...

“I see my body the way people see me”: A qualitative study on the acceptability and cultural adaptation of the mind.body.voice curriculum for Latina youth

Latina adolescents and emerging adults navigate conflicting appearance ideals, balancing the “Latina curvy ideal” with Eurocentric thinness standards that contribute to body dissatisfaction, disordered eating, and emotional distress. Few culturally tailored interventions have bee...

A framework for institutional change in the age of AI

Generative AI is rapidly reshaping STEM higher education. Not only are our educational practices changing, but how we think about educational transformation must also adapt. Existing models of institutional change in STEM, aimed at interactive engagement, have largely followed an...

Observation of Bridging Chlorine in Vitreous SiO2

Abstract The short-range to mid-range structure of inorganic glasses profoundly impacts their physical properties. In this work, we have used multiple spectroscopic methods to examine the change in the network structure of amorphous silica with addition of Cl. Unlike analogous F-...

Constraints on the Loss of Hydroperoxymethyl Thioformate (HPMTF) to Marine Clouds Using Aircraft Observations

Abstract The photochemical oxidation of dimethyl sulfide (DMS) by the hydroxyl radical (OH) contributes to the production and growth of particles and cloud condensation nuclei in the marine boundary layer (MBL). DMS oxidized by OH can go on to form a stable intermediate, hydroper...

Stars, Stripes, and Perceptions: Examining the Impact of the American Flag on Anticipated Interactions

The American flag is often associated with patriotism, solidarity, and national allegiance; however, it may not uniformly signal inclusion for all Americans. Across three studies (N = 1658), we examined whether the presence of the American flag in professional settings influences...

Assessing student learning in quantum computing: lessons from developing a test item on phase kickback

A major challenge for quantum workforce development is the need to both understand and reliably assess student learning of quantum information science (QIS) fundamentals. Yet student thinking is notoriously difficult to probe, even for seasoned education researchers. This article...

For Molecular Polaritons, Disorder and Phonon Time Scales Control the Activation of Dark States in the Thermodynamic Limit

Abstract Collective light–matter systems host an extensive manifold of dark states whose role in the emergence of thermodynamic behavior remains poorly understood, especially in the presence of disorder and structured environments. Here, we develop a hybrid matrix product state–h...

Dependent reachable sets for the constant bearing pursuit strategy

This paper introduces a novel reachability problem for the scenario involving two agents, where one agent follows another agent using a feedback strategy. The geometry of the reachable set for an agent, termed dependent reachable set, is characterised using the constant bearing p...