Institutional Repository
The UDSpace Institutional Repository collects and disseminates research material from the University of Delaware.
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- UDSpace also includes all doctoral dissertations from winter 2014 forward, and all master's theses from fall 2009 forward.
To learn more about UDSpace, and how you can make your research openly accessible to the public, visit our UDSpace Policies website.
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Recent Submissions
Navigating the politically charged classroom: Using inquiry to teach contentious social studies
(Theory Into Practice, 2025-02-07) Lewis, Bonnie; Swan, Kathy; Crowley, Ryan
Teaching social studies during politically volatile times is challenging. This article draws from the findings of an explanatory case study that examined 2 teachers’ instructional choices as they taught contentious social studies. The researchers sought to understand how the teachers navigated conflicting educational ideologies through their instructional choices when designing and delivering inquiry-based instruction. Data consisted of interviews, observations, and artifacts and was analyzed using a thematic approach with the Questions, Tasks, and Sources [QTS] Observation Protocol and the Framework for Teaching Controversial Issues serving as the analytical framework. From this study, we offer instructional strategies for navigating the challenges of teaching contentious social studies through an inquiry-based curriculum. We note how teachers can craft democratic compelling questions, select sources that contextualize contentious social studies, and plan for formative and summative performance tasks to support more deliberative argumentation.
A Hybrid BN-Doped Nanographene with Narrow Emission Bandwidths for OLEDs
(Chemistry - A European Journal, 2025-01-29) Diev, Vyacheslav V.; Zou, Yunlong; Kondakov, Denis; Yap, Glenn P. A.
We describe synthesis of BN-doped nanographene containing five phenylene units, boron and nitrogen atoms with alternating ortho-disposition, as well as direct B−N connections. Resulting BN doped nanographene exhibits blue fluorescence at 441 nm with an extraordinarily narrow fluorescence peak with a full width at half maximum (FWHM)=10–11 nm. Crystallography reveals supramolecular organization of this compound in the crystal phase. Initial organic light emitting device (OLED) data suggest that the presence of a directly connected B−N isostere can lead to devices with sufficiently long lifetime as well as narrow emission electro-luminescence peaks necessary for OLED applications.
Graphical Abstract available at: https://doi.org/10.1002/chem.202404078
Computational screening, synthesis and characterization identified BN-containing candidate 1 as a promising narrow bandwidth chromophore. BN doped nanographene exhibits blue fluorescence at 441 nm with an extraordinarily narrow fluorescence peak with full width at half maximum (FWHM)=10–11 nm that outperforms narrow bandwidths of the incumbent references. Utility of the compound for long lifetime narrow bandwidth OLEDs has also been demonstrated
Mental Illness and Substance Use Disorder Stigma: Mapping Pathways Between Structures and Individuals to Accelerate Research and Intervention
(Annual Review of Clinical Psychology, 2025-01-13) Earnshaw, Valerie A.; Mousavi, Mohammad; Qiu, Xueli; Fox, Annie B.
Researchers, interventionists, and clinicians are increasingly recognizing the importance of structural stigma in elevating the risk of mental illnesses (MIs) and substance use disorders (SUDs) and in undermining MI/SUD treatment and recovery. Yet, the pathways through which structural stigma influences MI/SUD-related outcomes remain unclear. In this review, we aim to address this gap by summarizing scholarship on structural MI/SUD stigma and identifying pathways whereby structural stigma affects MI/SUD-related outcomes. We introduce a conceptual framework that describes how structural-level stigma mechanisms influence the MI/SUD treatment cascade via (a) interpersonal- and individual-level stigma mechanisms and (b) mediating processes among people with MI/SUD (i.e., access to resources, psychological responses, behavioral responses, social isolation). We consider intersections between MI/SUD stigma and stigma based on race/ethnicity, gender identity, and sexual orientation. Finally, we discuss the implications of this review for future research, interventions, and clinical practice.
Seismic imaging of the Ecuadorian forearc and arc from joint ambient noise, local, and teleseismic tomography: catching the Nazca slab in the act of flattening
(Geophysical Journal International, 2025-06-01) Rodríguez, E. E.; Beck, S. L.; Meltzer, A.; Segovia, M.; Ruíz, M.; Hernández, S.; Roecker, S.; Lynner, C.; Koch, C.; Hoskins, M. C.; Charvis, P.; Agurto-Detzel, H.; Rietbrock, A.; León-Ríos, S.
The Ecuadorian Andes are a complex region characterized by accreted oceanic terranes driven by the ongoing subduction of the oceanic Nazca plate beneath South America. Present-day tectonics in Ecuador are linked to the downgoing plate geometry featuring the subduction of the aseismic, oceanic Carnegie Ridge, which is currently entering the trench. Using seismic tomography, we jointly invert arrival times of P and S waves from local and teleseismic earthquakes with surface wave dispersion curves to image the structure of the forearc and magmatic arc of the Ecuadorian Andes. Our data set includes > 100 000 traveltimes recorded at 294 stations across Ecuador. Our images show the basement of the central forearc is composed of accreted oceanic terranes with high elastic wave speeds. Inboard of the Carnegie Ridge, the westernmost forearc and coastal cordilleras display relatively low Vp and Vs and high Vp/Vs values, which we attribute to the increased hydration and fracturing of the overriding plate due to the subduction of the thick oceanic crust of the Carnegie Ridge. We additionally image across-arc differences in magmatic architecture. The frontal volcanic arc overlies accreted terranes and is characterized by low velocities and high Vp/Vs indicative of partial melt reservoirs which are limited to the upper crust. In contrast, the main arc displays regions of partial melt across a wider range of depths. The Subandean zone of Ecuador has two active volcanoes built on continental crust suggesting the arc is expanding eastwards. The mid to lower crust does not show indications of being modified from the magmatic process. We infer that the slab is in the process of flattening as a consequence of early-stage subduction of the buoyant Carnegie Ridge.
Why Some Job Seekers Avoid Family Firms
(FamilyBusiness.org, 2025-03-20) Phillips, Duygu; Madison, Kristen; Wolf, Sandra; Hack, Andreas; Kellermanns, Franz
Family firm branding can make a company appear authentic, but it's also important to convey innovativeness, prestige, and a fair shot at getting ahead.
While approximately 75% of new jobs worldwide are in family firms (Shanker & Astrachan, 1996; Wittmer et al., 2022), these firms often struggle to recruit new employees. “When looking for an employer, many [job seekers] initially look to the well-known names of the large corporations and only rarely focus their career planning on family businesses,” notes Stefan Klemm, Founder and Owner of the Entrepreneurs Club in Munich. (Karrieretag Familienunternehmen, n.d.).
Why do job seekers rarely consider family firms as potential employers? Our recent study explored why many family firms experience difficulties in recruiting, and we assumed it had to do with how job seekers stereotype family firms. So, we set out to understand these stereotypes and whether they made family businesses less attractive to job seekers. We believed that answering these questions would help family businesses develop more effective strategies to attract the best candidates for jobs.