This dissertation explores the entanglements of performed refusals and witnessing practices in the face of gendered violences. I analyze how contemporary artists use staged performance to generate new modes for witnessing histories of gendered violence across temporal and national boundaries. In particular, I investigate four performances addressing local histories of...
Volunteers play an essential role in humanitarian and non-profit organizations that strive to improve society. 30% of the population in the United States volunteered in 2019, and this percentage has been stable for the past two decades. This dissertation is motivated by the scheduling decision process in nonprofit organizations. These...
The simplicity of morphogenesis, manifested as collective shape changes, emerges from complex biophysical regulations within a multicellular embryo. Constructing a spatio-temporal atlas of mechanical stresses is central for understanding the emergence of this simplicity. Developing a new mathematical theory for the static mechanics of three-dimensional multicellular aggregates involving pressures and...
Bacteria represent the most abundant form of life on Earth and have evolved to successfully colonize nearly every environmental niche. In doing so, bacteria predominately form multicellular communities known as biofilms, resulting in increased resilience, persistence, and emergent behaviors. Consequently, biofilms present an attractive target for engineering and synthetic biology,...
The literature on racial/ethnic diversity in schools largely shows evidence of positive academic outcomes for students in diverse schools relative to segregated schools. At the same time, there is ample research demonstrating the discrimination and marginalization that students of color experience in desegregated schools. In this dissertation, I seek to...
Visual information plays a critical role in controlling movement. People use visual information to plan future actions and correct current actions through feedforward and feedback processes, respectively. We can gain insights into these visually guided motor control processes by quantifying where people look during movement and measuring how much they...
Historians have long argued that humanitarianism—what Thomas Haskell once described as “alleviating the suffering of distant strangers”—first emerged in eighteenth-century Europe as part of a complex set of perceptual changes involving capitalist growth, Enlightenment ideas, and Christian values. Given these claims, it is no coincidence that humanitarianism has often been...
Topology optimization is a powerful tool for maximizing structural performance, enabling multifunctionality of the structure, and reducing the materials waste and cost for sustainable manufacturing. However, current topology optimization tools are limited to a few scales, and the potential of nested topology optimization in engineering design has yet to be...
Early transition metal organometallics chemisorbed on extremely Brønsted acidic sulfated metal oxides such as sulfated alumina (AlS) and sulfated zirconia (ZrS) produce highly active single-site catalysts for olefin polymerization, alkene and arene hydrogenation, and alkane hydrogenolysis, typically with a large percentage of catalytically significant sites. The low support conjugate basicity...
Photochemistry allows chemists to harness the energy in specific wavelengths of light and use it to achieve new chemical transformations. These chemical transformations are often impossible or energetically demanding under traditional thermal conditions. My dissertation focuses broadly on different strategies to apply visible-light photochemistry and photocatalysis to the development of...
Policies supporting families with young children provide an important context for human development. The two primary public policies available to caregivers around and after childbirth are parental leave and early care and education (ECE). A substantial body of research evaluates the effects of parental leave and ECE policies on various...
This dissertation observes interaction to explore the influence of group argument in decision-making in mock juries. The goals of this investigation were to observe two-sided deliberations of a task-oriented decision-making group, map the dichotomous arguments and provide insight into what influences were at play in the final decision. The study...
How molecular chirality manifests at the nano- to macroscale has been a scientific puzzle since Louis Pasteur discovered biochirality. In general, amphiphilic molecules can organize into a variety of assembly shapes including micelles, spherical vesicles, cylindrical micelles, and planar bilayers. However, when such amphiphilic molecules are chiral, helical ribbons, helicoidal...
Heart failure is a growing clinical problem, and inherited cardiomyopathies contribute significantly to heart failure. Among the many genes associated with inherited cardiomyopathies, mutations in FLNC, the gene encoding the cytoskeletal protein filamin C, associate with a range of cardiomyopathy and increased risk for arrhythmia and sudden cardiac death in...
In recent years, motivated by the approaching of quantum limit for classic information science, the development of quantum information science (QIS) has drawn considerable interest from chemists and physicians. Different from classical bits which can only be localized on two different states, quantum bit, which can be simplified as qubit,...
Nilotinib is a highly effective tyrosine kinase inhibitor used to treat Chronic Myeloid Leukemia (CML). While nilotinib successfully treats CML, a common and serious side effect is development of nilotinib-induced arterial disease (NAD) even in patients without pre-existing risk factors. This side effect is not seen with imatinib, a CML...
Mycobacterium tuberculosis (Mtb) infection elicits both protein and lipid antigen-specific T cell responses. However, the incorporation of lipid antigens into subunit vaccine strategies and formulations has been under-explored, and the properties of vaccine-induced Mtb lipid-specific memory T cells have remained elusive. Mycolic acid (MA), a major lipid component of the...
In the late 2000’s, scientific studies in cultural heritage saw a great advancement in macro X-ray fluorescence (XRF) imaging of paintings. These images are used to generate elemental distribution maps, which aid in identifying chemical elements and paint pig- ments as well as their locations throughout the layers of the...
Objective: To evaluate patient-reported experiences of telehealth and disparities in access, use, and satisfaction with telehealth visits during the COVID-19 pandemic (aim 1), to evaluate prevalence of portal use pre-, peri-, and post-pandemic, among the C3 cohort, and investigate any disparities in use by sociodemographic factors (aim 2), and to...
Heterogenous catalysis is the pillar of chemical production and a crucial aspect for optimization toward a sustainable future. To improve the current design of heterogeneous catalysts of maximal activity and product selectivity, gaining fundamental understanding of the catalytic active sites is crucial. The nature of active sites has been the...
In this thesis, I study the effects of spillovers in all-pay auctions and the effects ofregulating wages and hours on the labor market. In the first chapter, I study a model of
asymmetric all-pay auctions with spillovers. In this model, players compete for a prize, and
the sunk effort players...
Air pollution is a pervasive environmental issue that has significant impacts on human health. Urban areas are particularly susceptible to high levels of air pollution due to concentrated emissions and populations. Urban air pollution has been linked to a range of adverse health effects, including respiratory diseases, cardiovascular diseases,...
Biological systems that perform critical reactions like carbon dioxide reduction, water oxidation, or phosphonate ester hydrolysis consist of many separate components with many different degrees of
freedom. While the functionality of pieces of these systems can be replicated synthetically to some
degree, the integration of synthetic catalysts into an overall...
The main topic of this thesis is generation in derived categories of coherent sheaves on smooth projective varieties. We develop a new approach that allows us to give a new proof of a recent result by Olander that powers of an ample line bundle generate the bounded derived category of...
Equilibrium models of star formation successfully derive the globally-averaged Kennicutt-Schmidt (KS) relation, positing that star formation rates (SFRs) are self- regulated by the turbulence in the interstellar medium (ISM) generated by stellar feedback. However, these models make assumptions that may not be achieved in realistic galaxy systems. Cosmological zoom-in simulations,...
An important tenet in memory research is the dissociation between explicit and implicit memory systems in the brain. Whereas a robust literature exists on the consolidation of memories in the explicit domain, research on implicit memory consolidation is relatively understudied, particularly questions about what is being consolidated and the mechanisms...
On March 11, 1966, Indonesian President Soekarno suddenly transferred executive power to the Army, which has played a role in the Indonesian state and society since the late 1950s. This act replaced Soekarno’s own government with a military dictatorship dubbed the New Order, which lasted for nearly 32 years. Why...
As sound changes advance across large geographic areas, they progress unevenly across populations. The speakers who lead these changes often share macro-social identities, like place or social class affiliations (e.g. Nesbitt 2018; Wagner et al. 2016). But the features undergoing these macro-level sound changes also hold social meanings related to...
The negative early and late health consequences from exposure to artificial sources of radiation are particularly apparent in victims of radiological emergencies who were diagnosed with cancer, radiation pneumonitis, among other conditions. The renaissance of nuclear energy, increased use of ionizing radiation in the medical field, and nuclear threats from...
Polymers occupied nearly every facet of our daily lives, and enhancing their mechanical and fracture properties has long been an important topic in the field of polymer science. Based on the various need in applications, polymers are designed to have a range of characteristics such as tackiness, optical properties, mechanical...
We all—users, businesses, governments, and the general public—expect internet platform companies, like Meta, Alphabet, and Amazon to govern their users. Without platform governance, we all experience disasters like foreign election interference, vaccine misinformation, counterfeiting, and even genocide.
Unfortunately, the platform companies have failed. To this day, despite the lessons from...
This project utilizes QCI Inc.’s Qatalyst quantum optimization tools to find the most optimal solution to a randomly generated maze. The maze is traversed and mapped into a spanning tree and then transformed into a set of linear constraint functions. The constraint functions and an objective matrix are used to...
Utilizing a quantum computer and Microsoft Q# SDK to create a quantum neural network aimed to recreate a predetermined dataset that contains feature map parameters. The algorithm was used to simulate solar system models closely resembling real life, visualized using the 3D modeling engine Blender and Unreal Engine 5.
The...
The objective of this project is to build an implementation of the Prisoner’s Dilemma game that takes advantage of quantum properties. Besides the two options we see in a classical prisoner’s dilemma, to confess and to not confess, we introduce an additional quantum option that gives both players a better...
Data and Fortran code for Figures 2 and 3 of "Phase Separation and Ripening in a Viscoelastic Gel" by Tine Curk and Erik Luijten, Proc. Nat. Acad. Sci (2023).
The aviation industry is set to see another significant leap in new technology, namely electric aircraft. As of the time of this research, both 9-seat and 19-seat aircraft would be ready to be launched by air service providers under the Essential Air Service (EAS) program. While electric aircraft manufacturers are...
At her first press conference, Eleanor Roosevelt, uncertain of her role as hostess or leader, passed a box of candied grapefruit peel to the thirty-five women journalists. Nearly sixty years later, Hillary Clinton, an accomplished professional woman and lawyer, tried to mollify her critics by handing out her chocolate-chip cookie...
Winner, 2012 Frank Luther Mott-Kappa Tau Alpha Research Award
Women of the Washington Press argues that for nearly two centuries women journalists have persisted in their efforts to cover politics in the nation’s capital in spite of blatant prejudice and restrictive societal attitudes. They have been held back by the...
When Abigail Adams made her famous plea to John Adams to "remember the ladies," the role of advocacy on behalf of U.S. gender equality began its rocky and still uncompleted journey. In Women and the Press, Patricia Bradley examines the tensions that have arisen over the course of this journey...
In Spoiling the Stories, Tamar Merin presents the as yet untold story of the rise of prose by Israeli women, while further exploring and expanding the gendered models of literary influence in modern Hebrew literature. The theoretical idea upon which this book is based is that of intersexual dialogue, a...
Manuscript available at arXiv:2305.10226
Abstract:
In this study we will show a new method of polishing for Nb3Sn cavities known as centrifugal barrel polishing (CBP). Using this method, Nb3Sn coated samples are polished to a surface roughness comparable to a traditional Nb cavity after electropolishing (EP). We also investigate different...
A noncomprehensive list of large urban fires in the 1850s United States. All fires were large enough to destroy 20 structures or do $200,000 in damage (in 1850s dollars). Some fires are included on the basis of verbal descriptions (e.g., "downtown destroyed") that suggest that the fires were of this...
The number of Hispanics in engineering departments at companies and universities differs from the proportion of Hispanics in the US population. Hispanics represented only 8% of the STEM (Science, Technology, Engineering and Mathematics) workforce in 2020, despite being 17% of the overall workforce. The ethnic disparity in STEM occupations contributes...
Data in support of the manuscript titled "Humans Exploit the Trade-Off Between Mediolateral Stability and Manoeuvrability During Walking".
Abstract:
People use the mechanical interplay between stability and manoeuvrability to successfully walk. During single limb support, body states (position and velocity) that increase lateral stability will inherently resist lateral manoeuvres, decrease...
The predominant, categorical system used to classify and diagnose psychiatric disorders suffers from several critical scientific limitations, including extensive comorbidity, unreliability, and disorder heterogeneity. As such, clinical psychological scientists are increasingly moving away from this traditional, categorical system, and toward empirically-based, dimensional, and transdiagnostic alternatives such as the Hierarchical Taxonomy...
In the Maximum-a-Posteriori (MAP) Inference problem, for any given probability distribution, the goal is to find the point in the support of that distribution with the highest probability. Potts models and Determinantal Point Processes (DPPs) are probabilistic models that were introduced in the context of statistical physics several decades ago....
Over the past four decades, the rate of incarceration for women has risen significantly. Black women are disproportionately represented among incarcerated women. Formerly incarcerated women and men face similar barriers upon release from incarceration, such as obtaining stable and gainful employment, securing safe and affordable housing, and reconnecting with children...
The extracellular matrix (ECM) is a masterwork of biology, and its development was a key part of the transformation from monocellular to multicellular life. With an ECM, cells acquired the ability to cooperatively build a dynamic support network that facilitated their movement, specialization, and communication. This ECM is a hierarchical...
Metaphor is an important and pervasive phenomenon in language and cognition. The vast majority of psycholinguistic research on metaphor has focused on noun metaphors (e.g., That surgeon is a butcher; That lawyer is a shark), while relatively little has investigated the processing of verb metaphors (e.g., The car limped down...
Since Infrared radiation was discovered in 1800s, the research and applications on the infrared regime have been continually developed. The infrared detectors are the key technology in these applications and have been successfully used for medical imaging, light detection and ranging (LiDAR), free-space optical communication, target tracking and object identification...
Parkinson’s disease (PD) is the second most common neurodegenerative disorder, causing devastating disabilities in both motor and non-motor domains following the degeneration of dopamine (DA) producing neurons of the substantia nigra pars compacta (SNc). Current treatments are highly limited in efficacy, and no established treatments currently exist to alter disease...
With the advancement of high-throughput sequencing technology, it has become much easier to extract gene expression data and to discover gene-disease associations more efficiently. Longitudinal gene expression data offer more insight into expression patterns for distinct patient groups compared to cross-sectional data. For instance, patients diagnosed with subclinical acute rejections...
This dissertation comprises three distinct essays in mechanism design and economic theory. The first chapter studies the welfare implications of consumer data ownership and voluntary disclosure. I formalize this setting within a model of mechanism design with evidence and construct the seller's optimal mechanism. Perhaps surprisingly, I find that allowing...
As our world is increasingly filled with data visualizations, having the skills to leverage data visualizations is essential for participation in society. Confident engagement with data visualizations is critical for being an educated member of society; however, research has shown that it is difficult for individuals to digest and gain...
Motivated by rhythms in the brain, we investigate the synchronization of noisy and all-to-all pulse-coupled oscillators. We consider a case where the oscillatory excursions are of varying amplitude and where only sufficiently large excursions result in the output pulses that drive the interactions between the oscillators. In the regime of...
This dissertation aims to understand the contribution of schools to reducing bullying behaviors and, in turn, to examine the benefits for students of attending a school that effectively reduces bullying. In doing so, this dissertation contributes to the literature on bullying by a) locating the school as a key environment...
Understanding the characteristics of interfaces between materials and solvent media such as structure, chemistry, and charge remains crucial to determining the properties and performance of numerous systems and technologies. This thesis focuses specifically on characterizing the interactions of water at oxide interfaces. A large collection of questions remains unanswered about...
In the Western Common Law tradition, legal decisions constrain and guide future cases involving the same legal issues. Although the legal academy disagrees about the specific nature of such precedential reasoning, including about the role of analogy in legal reasoning, there is ample evidence from cognitive science that analogical learning...
Genetic studies have found variants in the protein-degrading autophagy-lysosomal pathway (ALP) to be among the most common risk factors for developing Parkinson’s disease (PD). Macroautophagy (MA) is the arm of this pathway which delivers cytosolic components to lysosomes for degradation and is essential for neuronal health. The defining pathological protein...
Christian artists use dramatic license and theatrical representation to mold idealized versions of the Bible into recreational spaces for popular consumption, such as immersive theaters, theme parks, and museums. For these Christian artists, the impulse to evangelize through theatrical representation overcomes deeply ingrained religious sentiments of antitheatricality and result in...
Efficient and sustainable utilization of global resources represents a grand but achievablechallenge. By leveraging biology, we can transform abundant, but recalcitrant resources like lignin
to products ranging from fuel to medicine to polymers. Efforts to do so are expansive, but
challenges remain, due in no small part to the difficulty...
Solid acid fuel cells confer unique advantages over nearby technologies, such as polymer electrolyte membrane fuel cells (PEMFCs) or solid oxide fuel cells (SOFCs), due to the solid acid electrolyte – a solid-state, anhydrous, intermediate-temperature proton conductor.Despite these encouraging unique properties, solid acid fuel cells have performed unfavorably in comparison...
Situated at the intersection of literary, religious, and economic studies, this dissertation examines how late medieval writers used commercial practice to invent new modes of penitential piety. Challenging scholarship that characterizes the relationship between church and commerce as exclusively antagonistic or corrosive, I argue that the convergence of these two...
Many estimation and inference procedures rely on asymptotic approximations for quantities that are unknown to researchers. While often convenient, such approximations can be poor in practice, even when the number of observations is ostensibly large. One response is to eschew asymptotics in favor of finite sample bounds. While remarkable progress...
Light is a powerful tool for manipulating and probing magnetic states in solid state systems. In particular, optically-induced spin orientation, the ability to orient spin with polarized light, has been extensively utilized in low-dimensional III-V and II-VI semiconductors to pioneer spintronic research. Even though traditional semiconductors have found a wide...
As of 2020, there are currently 5.8 million people in the United States suffering from Alzheimer’s Disease (AD), a debilitating and progressive neurodegenerative disorder. Of these nearly six million people, two-thirds are women. While it has been suggested that women’s longer lifespan accounts for this disparity, the overall lifetime risk...
This dissertation examines how racially, ethnically, and sexually minoritized women embodied and contested competing images of national identity between World War II and the Cold War. I challenge dominant narratives of modern dance, which overlook gender politics as women left the art form and white men gained prominence in it...
Cultural appropriation is a topic well-discussed in public discourse and theorized in the philosophical literature, however, it remains vastly understudied in psychology. Existing conversations center on whether cultural appropriation even exists, how it is defined, and if there are psychological and social impacts of being appropriated. No research to date...
Conventionally cross-linked polymers, which comprise the vast majority of commercial thermosets, cannot be decross-linked after curing or flow upon heating. Therefore, they cannot be effectively recycled into high-value products at end-of-life. Their lack of recyclability is due to the permanent cross-links, which restrict the flow of the chains in the...
This dissertation is a review of three projects I worked on during my time in the Computational Photography Lab at Northwestern University. First, a source separation problem for the X-Ray Fluorescence images of painted works of art is addressed through the incorporation of Hyperspectral Reflectance data. Following this, a discussion...
Visual localization is a critical capability for autonomous systems, enabling them to accuratelyestimate their position and orientation within an environment using visual data. This thesis focuses
on achieving a robust and reliable visual localization on both local and global level to enhance
localization performance in a wide range of environments....
Voltage-gated potassium (KV) currents play a crucial role in shaping and controlling the firing patterns that serve as the fundamental basis for the differential signal processing from the ear to the auditory cortex, with distinct firing patterns observed with high- and low-frequency phenotypes. This is an interesting phenomenon, in the...
Lackluster BA completion rates have made it clear that improving postsecondary outcomes in the U.S. is not simply a matter of raising college enrollment rates. In addition to increasing the number of people who attend college, it is also important to increase the number of people who graduate. Over the...
Tailoring the design of surfaces and interfaces with nanoscale features has the ability to significantly impact biological functions for a swath of applications including drug delivery, structure assembly, and biomedicine. For example, creating spatially defined nanoscale patterns has been known to contribute to changes in cellular architecture and mechanical properties,...
The Ohio River Valley was the site of an intense rivalry between Protestants and Catholics in the nineteenth century, as members of each group vied to extend their control through the development of churches, schools, orphanages, and other institutions. This dissertation explores the process and analyzes the effects of Catholic...
Popular histories of United States mass incarceration often focus on federal wars on crime, law and order policing, and the passage of harsh sentencing laws to explain how the United States transformed into the world’s leader in incarceration. My dissertation on the crisis of state prison overcrowding and prisoner resistance...
In this thesis, we discuss classical and recent results around the damped wave equation on compact and noncompact manifolds. We firstly show that on asymptotically cylindrical and conic manifolds, the geometric control condition and the network control condition give exponential and logarithmic decay rates respectively. We then show that a...
Stimulation of the cGAS-STING (cycle GMP-AMP synthase-Stimulator of Interferon Genes) pathway increases T cell activation and tracking into the tumor and reverses the immunosuppressive phenotype of myeloid cells. Direct targeting of the STING receptor using synthetic cyclic dinucleotide (CDN) ligands represents an attractive immunotherapeutic strategy for the treatment of lymphocyte-depleted...
Political theorists generally ascribe to the state a decisive role in the formation and protection of property rights, a view especially prevalent in the historiography of financial property in the United States. Given the capacities of government at the American Founding, however, such accounts are implausible. Drawing on writings composed...
Recent developments have enabled L12-strengthened Co-based superalloys, which have thepotential to surpass Ni-based superalloys as the material of choice for the hottest sections of turbine
blades due to cobalt’s 40 ºC higher melting point. The most-studied branch of Co-based
superalloys are based on the L12 phase Co3(Al,W); however, there is...
Caught between world wars and Stalin’s consolidation of power, citizens of Soviet Russia of the 1920s and 1930s had little to laugh about. Yet a unique tendency toward disruptive humor surfaces in poetry and prose over these two decades. I explore disruptive humor in select longer poetry of Nikolai Zabolotsky,...
This dissertation consists of three chapters about education policies in developing countries. The first chapter examines two extrapolation approaches to make out-of-sample predictions using cash transfer experiments in Malawi and Morocco. The second chapter evaluates India's workfare program in terms of targeting efficiency and effects on school enrollment, in comparison...
We present both semiclassical asymptotics for the wave equation on a stationary Kaluza-Klein spacetime and an index theorem describing the difference of the positive-frequency
spectral projectors for two stationary regions in a globally hyperbolic spacetime. The
first result involves analyzing the restrictions of the wave trace to isotypic subspaces for...
This dissertation focuses on two topics in international macroeconomics: the identification of the international spillovers of US interest rate shocks, and the study of its main transmission channels. In Chapter 1, I present the Spillover Puzzle of US Monetary Policy - the fact that in response to a US interest...
Chapter 1 investigates asks the question how do financial frictions affect the type of human capital investments that students make in college? To study this question, I build a novel dataset covering more than 700,000 U.S. students, merging commencement records with address histories, credit bureau records, and professional resumes. I...
From daily hygiene habits, such as brushing teeth, to the ingestion of pharmaceuticals, many forms of healthcare are commonly practiced in daily life, at home. How have household healthcare practices changed over time in urban America? Taking Washington, DC as my case study, I examine patterns of household pharmaceuticals access...
This dissertation aims to understand how Black Chicagoans work with institutions and neighbors they distrust to pursue common policy goals – in this case, to remedy state and community violence. I introduce the theory of distrustful cooperation. Using three Chicago neighborhoods as cased studies: Greater Englewood, Bronzeville, and Calumet Heights,...
Motor abnormalities (e.g., dyskinesia, psychomotor slowing, neurological soft signs) are core features of schizophrenia observed from the premorbid period through chronic illness, suggesting motor dysfunction may reflect the pathophysiology of psychosis. Among this list of motor abnormalities, psychomotor slowing in particular is one of the most consistently observed and robust...
Atomistic methods offer a powerful set of tools in the study of materials systems, as they allow materials scientists to ask questions with a high degree of specificity. They are well suited for studying and designing energy materials, critical due to the climate crisis, in part due to their ability...
The importance of understanding indoor microbial exposure is increasingly recognized, particularly concerning the emergence of pathogens and antimicrobial resistance. With the advancements of sequencing technologies, our capability of exploring indoor microbial communities has dramatically increased. However, huge challenges remain to translate sequence-based knowledge to actionable interpretations to support human health...
Every music theorist has their own personal reasons for engaging in the craft of theorizing about music. Many discover that there is something special about a theoretic disposition which differs from other sorts of interactions with music. It is often this special something that draws musicians into the discipline: specifically,...
This dissertation explores the economics of health and housing policies. In the first chapter, I discuss information disclosure policies in healthcare. Information disclosure programs can help consumers make better choices, but the consumers who respond the most to the information may not benefit the most or generate the most savings...
Heteroanionic materials are a class of materials of interest for their unique and tunable electronic, ionic, thermal, and optical properties, which are distinct from their homoanionic counterparts due to their multi-anionic nature. Oxynitrides, a type of heteroanionic material, are useful catalysts due to the effect of mixing oxygen and nitrogen...
Astronomy has entered a “multimessenger” era: one that combines electromagnetic “sight” with gravitational “touch.” This dissertation serves as a roadmap of the multimessenger frontier, to join the littered environments of dead and dying starswith their unclear origins. To uncover stars’ innermost secrets, we explore rare, transient glimpses into single, double,...