Institutional Repository
The UDSpace Institutional Repository collects and disseminates research material from the University of Delaware.
- Faculty, staff, and graduate students can deposit their research material directly into UDSpace. Faculty may use UDSpace to fulfill the University of Delaware Faculty Senate Open Access Resolution, and in many cases may use it to fulfill open access requirements from grant funding agencies.
- Departments can use UDSpace to publish or distribute their working papers, technical reports, or other research material.
- 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
Early Childhood Education in Global Society: Who Are We Missing?
(Childhood Education, 2026-01-29) Han, Myae
This paper explores the overlooked population in early childhood education (ECE) in global society: refugee children, and children/families experiencing homelessness. As part of global political shifts, the world has witnessed the increasing presence of vulnerable populations—including immigrants, refugees, and children and families experiencing homelessness. I present the status of refugee population and families experiencing homelessness and its implication for early childhood educators. The paper advocates for a global, justice-oriented approach to ECE, emphasizing compassion, empathy, and the importance of play-based education for vulnerable children. It calls for a shift from advocacy to activist research, urging professionals to engage with marginalized communities to co-create inclusive educational practices and policies. The future of ECE depends on who we choose to include—and support.
The accommodation of indigenous norms in international criminal justice institutions: the case for hybridty
(International Journal of Comparative and Applied Criminal Justice, 2026-01-27) Fichtelberg, Aaron M
This paper uses the concept of hybridity as developed by the postcolonial theorist Homi Bhabha to critique and reconstruct the foundations of international criminal law. Examining three aspects of contemporary international criminal justice (its modes of evaluating evidence, its substantive law, and its penal practices), it argues that the system is rooted in eurocentric, liberal notions of criminal justice. In response to this problem, hybrid courts represent a normative opening where western and nonwestern justice traditions can negotiate the nature of justice and law in a fashion that is captured by Bhabha’s theory. It concludes with reflections on how hybrid courts can be strengthened to develop a more inclusive model of international criminal justice.
2026, 6th Issues
(2026-02-06)
Photonic Integrated Circuits for Angle-of-Arrival and Frequency Estimation
(IEEE/OSA Journal of Lightwave Technology, 2026-02-15) Sinigaglio, Hannah I.; Gehl, Michael; Murakowski, Janusz; Creazzo, Timothy; Prather, Dennis W.
This paper demonstrates concurrent spatial and spectral signal classification using two photonic integrated circuits (PICs) implemented in a 30-element Ka-band (26.5-40 GHz) antenna array. The received signals are coherently up-converted to the optical-domain using lithium niobate phase modulators. The up-converted RF signal is beamformed in a star-coupler PIC to instantaneously image angle-of-arrival to a single output channel that is amplified and input to an arrayed waveguide grating (AWG) PIC, which instantaneously channelizes the RF frequency into increments of approximately 1 GHz. A switching scheme is used to calibrate the AWG as well as alternate between frequency and beam location measurement. This work implements these devices in a radiometer that can localize RF beams both spatially and spectrally with minimal latency and computational requirements. Future applications will include advanced wireless communications and sensing.
Formal recognition of host-generalist species of dinoflagellate (Cladocopium, Symbiodiniaceae) mutualistic with Indo-Pacific reef corals
(Journal of Phycology, 2023-05-01) Butler, Caleb C.; Turnham, Kira E.; Lewis, Allison M.; Nitschke, Matthew R.; Warner, Mark E.; Kemp, Dustin W.; Hoegh-Guldberg, Ove; Fitt, William K.; van Oppen, Madeleine J. H.; LaJeunesse, Todd C.
The existence of widespread species with the capacity to endure diverse, or variable, environments are of importance to ecological and genetic research, and conservation. Such “ecological generalists” are more likely to have key adaptations that allow them to better tolerate the physiological challenges of rapid climate change. Reef-building corals are dependent on endosymbiotic dinoflagellates (Family: Symbiodiniaceae) for their survival and growth. While these symbionts are biologically diverse, certain genetic types appear to have broad geographic distributions and are mutualistic with various host species from multiple genera and families in the order Scleractinia that must acquire their symbionts through horizontal transmission. Despite the considerable ecological importance of putative host-generalist symbionts, they lack formal species descriptions. In this study, we used molecular, ecological, and morphological evidence to verify the existence of five new host-generalist species in the symbiodiniacean genus Cladocopium. Their geographic distribution and prevalence among host communities corresponds to prevailing environmental conditions at both regional and local scales. The influence that each species has on host physiology may partially explain regional differences in thermal sensitivities among coral communities. The potential increased prevalence of a generalist species that endures environmental instability is a consequential ecological response to warming oceans. Large-scale shifts in symbiont dominance could ensure reef coral persistence and productivity in the near term. Ultimately, these formal designations should advance scientific communication and generate informed research questions on the physiology and ecology of coral-dinoflagellate mutualisms.