Complex oxides show great potential for future devices as they offer functionalities beyond what can be delivered by conventional semiconductors. Among the complex oxides, the ABO$_{3}$ perovskite oxides are the most studied and engineered in the form of thin films and heterostructures. This thesis applies powerful synchrotron-based X-ray characterization tools,...
At the interface of two dissimilar entities, something novel can emerge. This idea has driven a vast amount of fruitful work on semiconductor interfaces, and given us the digital revolution. In the past decade, remarkable progress has been made in the synthesis and understanding of interfaces between oxides, opening up...
Technology has advanced rapidly, especially in the twenty-first century, influencing our day-to-day life on unprecedented levels. Most such advances in technology are closely linked to, and often driven by, the discovery and design of new materials. It follows that the discovery of new materials can not only improve existing technologies...
This dissertation examines growth of platinum nanoparticles from vapor deposition on SrTiO3 using a characterization approach that combines imaging techniques and X-ray methods. The primary suite of characterization probes includes atomic force microscopy (AFM), grazing-incidence small-angle X-ray scattering (GISAXS), X-ray fluorescence (XRF), scanning electron microscopy (SEM), and X-ray absorption spectroscopy...
Background: Evidence supporting a bidirectional relationship between depression and recurrent cardiovascular disease (CVD) appears strong, but there remains a need to better characterize the role of depression in CVD risk and cardiovascular health (CVH) promotion, especially in the context of comorbid risk factors such as cigarette smoking. In the present...
Oxide surface structures play a key role in many technological processes, including catalysis, thin film growth, and layered structures, and a thorough understanding of surface structures and surface structure dynamics is required in order to better engineer materials systems for these processes. This research works towards understanding these fundamental principles...
In order to make informed policy recommendations, development research faces two broad challenges: first, to identify and estimate the effects of interventions where they have occurred, and second to build and test theories about the effects that a related intervention would be hypothesized to exert in a different context. I...
This paper examines the relationship between a party'’'s descriptive representation of women and its ideological proximity to female and male voters. I find that male and female voters are both objectively closer to parties with more females in their delegations. However, males are more likely to subjectively assess parties with...
In this paper, Morgan and Orloff survey the contemporary study of states in the social sciences. They begin by tracing the history of scholarship on the state. The authors identify six main clusters of research on states that emerged through the effort to “bring the state back into” history and...
This Handbook provides resources that help explain and contextualize the intersecting crises that destabilized Mali in 2012-2013. These crises included a rebellion by Tuareg separatists, a coup by junior officers, and violence carried out by Muslim militants. In addition to an overview of the crisis, the Handbook contains historical timelines,...
This is the introductory chapter of my forthcoming book with the same title. The three primary objectives of this book are to reveal the paradigm shift of the contemporary international judiciary, conceptualize how new–style international courts (ICs) contribute to international politics, and normalize our understanding foremost as courts, and second...
This paper explores the link between the public policy and the survival strategies of a hybrid political regime. Using the case of higher education in Russia, I show how the Russian state elites use the policy tools widespread in Western democracies to achieve domestic political goals. Introduction of quasi-market mechanisms...
This article examines the ramifications of international law on political refugees. The Cessation Clause, or Article 35 of the 1951 Refugee Convention of the United Nations, guarantees the right of refugees to return home under the assumption that return is the primary objective of refugees. Yet, Harrell-Bond argues in this...
This article presents preliminary, selected findings from a larger study of students experiences in international education. The paper focus on those findings that are related to student understand ing of citizenship identity during the mobility experience. Specifically, it draws on interviews and surveys collected in Germany from 387 students participating...
During the Second Lebanon War of 2006, Israel's government applied a capital- and firepower-intensive military doctrine poorly suited for its ambitious, and publicly declared, goals. The paper explains this apparently non-strategic behavior with a theory of democratic militarism, arguing that a capitalized military doctrine results in a condition of moral...
This paper explores the importance of the Low Countries to Habsburg Spain in the sixteenth century and the outbreak of the Dutch Revolt. It examines the upper tiers of the Low Country nobility, the grands seigneurs and the gentileshommes, and the tensions over religious practice and political rights that developed...
This paper provides an overview of key governance issues of relevance to the upstream oil and gas industry in Canada. The focus is on implications of Canada's constitutional organization as a federation. Regulatory structures and provisions are described, as are revenue-sharing arrangements. Challenges for macro-economic management and for the environmental...
The past decade has witnessed exponential growth in study abroad participation. During these same years the promise that studying abroad will make students into Global Citizens has been a nearly ubiquitous feature in the promotion of the experience. Yet, Global Citizenship remains a highly contested concept that is rarely defined,...
The International Criminal Court is considemring adding "aggression" to the crimes for which individuals can be prosecuted by the Court. Michael Glennon's recent article on the subject criticizes this effort from many angles, but a close consideration of his objections shows that each of them misses its target. I use...
This paper discusses the recent (2007) declaration of the Caucasus Emirate by Islamist guerilla fighters waging jihad against Russia in several republics of the Northern Caucasus (Russian Federation). It analyzes the practical reasons and ideological agendas behind the creation of this new polity that remains largely virtual with the website...
This essay analyzes the historical struggle of the Muslim community to have a voice in Kenyan politics and the Islamic topics that have surfaced during electoral periods. A minority group in Kenya, Muslims have faced political marginalization more on the basis of race and ethnicity than religion. The pre-independence period...
Delegation to ICs has increased rapidly since 1990, leading to a proliferation of international courts with a fundamentally different design. There are now 20 active ICs, plus eight more ICs that exist mostly on paper. "New style" international courts have compulsory jurisdiction, and often they have access for non-state actors...
The European Coal and Steel Community (ECSC) was the first step in the process of European integration. Its founders had lofty aspirations that integration in the coal and steel would spill into a larger endeavor, and early scholarly analyses suggested that coal and steel integration was spurring more fundamental political...
Recent discoveries of black hole (BH) candidates in galactic and extragalactic globular clusters (GCs) have ignited interest in understanding how BHs dynamically evolve in a GC and the number of BHs (NBH) that may still be retained by today's GCs. Numerical models show that even if stellar-mass BHs are retained...
Numerous studies have been structured to
investigate magnetoelectric multiferroic
materials, which possess simultaneous
ferroelectric and (anti)ferromagnetic
ordering. Bismuth ferrite (BiFeO3), referred
to as BFO, has drawn special attention
because of its unique ability to maintain both
electric and magnetic dipole moments at
room temperature. BFO shows great
potential to revolutionize...
On February 22, 2022, I gave a talk hosted by the African Studies Program of Georgetown University. Two days later, Russian battalions were sent across Ukraine’s borders by President Vladimir Putin. In real time, viewers around the world have seen immense distress unleashed on innocent citizens. In Africa, distress has...
In his Nobel lecture Herbert Kroemer famously stated that “The interface is the device”. While he made this statement in the context of semiconducting heterostructures, it has proven to be just as relevant for more complex materials, such as the transition metal oxides. In particular, the 2-D conducting gas that...
Social engagement, or shared attention between a child and caregiver, is a critical process for language and social development. Although previous EEG studies have investigated child social processing in closely controlled, experimental studies, no study has examined the interactive, reciprocal process of naturalistic social engagement. In my first paper, we...
Regulatory T (Treg) cells are required to control immune responses and maintain homeostasis, but are a significant barrier to antitumor immunity. Conversely, Treg instability, characterized by loss of the master transcription factor Foxp3 and acquisition of proinflammatory properties, can promote autoimmunity and/or facilitate more effective tumor immunity. A comprehensive understanding...
Halide perovskites, AMX3 (A = monocation, B = Ge, Sn, or Pb, and X = halogen), present a versatile class of solution-processable semiconductors made from earth abundant materials with outstanding electrical and optical properties. Their solar cell efficiencies have dramatically increased from ~9% to ~22% in less than five years...
The mechanisms governing selective CaCO3 crystal nucleation in living organisms remain unclear. For example, nacreous layers from the inner surfaces of shells are built as brick-and-mortar complexes of plate-like aragonite single crystals and organic layers. Unstable [001] surfaces of calcite columns in prismatic layers are also stabilized by organic molecules....
The scope of this thesis extends to the study of surface structures and electronic properties in a number of complex oxides. The c(6x2) surface reconstruction on SrTiO3 (001) was solved using a combination of plan view transmission electron microscopy imaging, atomic resolution secondary electron imaging, and density functional theory calculations....
Physiochemical phenomena in aqueous systems, such as corrosion, catalysis, and energy storage, are driven by the molecular-scale interactions of ionic species with charged solid surfaces. In particular, an electrical double layer (EDL) of ions forms within nanometers of a charged surface. The properties of the EDL have been explored from...
Transposable elements (TEs) have been recognized as potentially powerful drivers of genomic evolutionary change, but factors affecting their mobility and regulation remain poorly understood. Chaperones such as Hsp90 buffer environmental perturbations by regulating protein conformation, but are also part of the PIWI-interacting RNA pathway, which regulates genomic instability arising from...
NiTi shape memory alloy (SMA) has drawn a great deal of attention for its various applications in the medical field (orthodontics, cardiovascular stents technology, etc.) and in other engineering fields (aerospace, aircraft, automotive, etc.) as it shows shape memory effect, superelasticity and biocompatibility. The fatigue-related issues, however, are pronounced in...
Affective science has long been interested in the coherence between different emotion response systems (e.g., subjective emotional experience, behavior, physiology). Although evolutionary functionalist accounts of emotion hold that emotional coherence should be related to greater adaptation, few studies have analyzed links between emotional coherence and wellbeing. Thus, in this laboratory-based...
Contemporary Ethiopian is, without question, facing enormous challenges. At the core of these challenges lay a state-building process major constituencies and elite groups were either alienated from, forced to acquiesce to, or coopted into. Unable to derive political legitimacy from democratic participation, successive governments largely relied on coercion and neopatrimonialism,...
Included in this submission are the following supplementary materials that were unable to be included in the article, but the authors would like to make available for other researchers:
● Raw data csv files and R analysis code
● Supplemental graphs
● Full bibliography
● Sources of Materials document
●... and Below is the abstract for the forthcoming Book and Paper Group Annual article at the time of this submission.
Rigid polysaccharide gels are a vital area of research for library and paper conservation, as they are still a relatively new material in the field. This experiment investigates anecdotal concerns of...
The theorists who developed Social Justice Education (SJE) claim that its goals are: to critically analyze how oppression operates on an individual, cultural, and institutional level, to harness empathy and respect for others, and, ultimately, to commit to working for lasting change. However, the literature lacks research on how to...
In this thesis we study minimal measures for Lagrangian systems on compact manifolds. This thesis consists of three parts which are closely related.
The first part is Chapter 3 and Chapter 4. In Chapter 3 and 4, we consider geodesic flows on compact surfaces with higher genus. We show that...
The idea of the unity of audition and vision has been a topic of interest since the time of ancient Greece. Investigation of this idea has continued to grow in many areas, especially in psychology, music, visual art, and computer science, most notably since the invention of the world's earliest...
The semiconductor-based Quantum Cascade Laser (QCL) offers several key advantages over gas lasers, solid-state lasers, and other semiconductor-based mid-infrared lasers. While the QCL has historically operated best in the λ ~ 7-9 μm range using InP-based materials, a major challenge has been to achieve a high-power, room-temperature continuous-wave (CW) operation...
The overall objective of this thesis is to develop a package of high-resolution, non-invasive experimental and numerical approaches to observe in situ pore-scale geometry modification due to colloid deposition, and quantitatively predict its effects on the large-scale transport properties of the porous medium. High-energy synchrotron-based X-ray difference micro-tomography (XDMT) was...
Funding risky Research and Development (R&D) and New Product Development (NPD) projects is crucial for the long term health of any large company. Such funding decisions are multiobjective and are undertaken with sparse data. Therefore prescriptive or algorithmic solutions are not adopted by practitioners. Descriptive solutions that provide managerial insights...
Visual object tracking, i.e. consistently inferring the motion of a desired target from image sequences, is a must-have component to bridge low-level image processing techniques and high-level video content analysis. This has been an active and fruitful research topic in the computer vision community for decades due to both its...
This dissertation analyzes the transformation of fantasy sports from a deviant, outside-the-mainstream fan culture to a billion-dollar industry that comprises almost 20 million North American participants. Fantasy sports are games in which participants adopt the simultaneous roles of owner, general manager, and coach of their own teams of real athletes...
Inactivation of tumor suppressors genes, which encode regulatory proteins critical for maintaining normal cellular function, is a common occurrence in cancer. Ikaros is a hematopoietic-specific zinc finger protein that functions as a differentiation regulator and has properties of a tumor suppressor. Ikaros functions to regulate gene expression as a component...