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Publications

Background In 2018, Facebook introduced Ad Archive as a platform to improve transparency in advertisements related to politics and …
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The blurry line between nefarious fake news and protected-speech satire has been a notorious struggle for social media platforms. …
Preprint Project

We present preliminary results on the online war surrounding distrust of expertise in medical science – specifically, the issue …
Preprint Project

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Content regulation and censorship of social media platforms is increasingly discussed by governments and the platforms themselves. To …
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We propose, and test, a model of online media platform users’ decisions to act on, and share, received information. Specifically, …
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Objectives/Hypothesis Standard stimulating methods using square waves do not appropriately restore physiological control of individual …
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As part of ongoing post-market surveillance, the US Food and Drug Administration (FDA) accepts medical device reports (MDRs) describing …
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Online misinformation is primarily spread by humans deciding to do so. We therefore seek to understand the factors making this content …
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Social bots and other malicious actors have a significant presence on Twitter. It is increasingly clear that some of their activities …
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Intelligence community experts face challenges communicating the results of analysis products to policy makers. Given the high-stakes …
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Background: Despite the introduction of the human papillomavirus (HPV) vaccination as a preventive measure in 2006 for cervical and …
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Scholars have posited that systems’ architectures drive their lifecycle properties. Often, these architectures are modeled using …
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Introduction The Centers for Disease Control and Prevention (CDC) spend significant time and resources to track influenza vaccination …
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Objectives. To understand how Twitter bots and trolls (“bots”) promote online health content. Methods. We compared bots’ to average …
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Fuzzy-trace theory assumes that decision-makers process qualitative “gist” representations and quantitative “verbatim” representations …
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Background: Racial and ethnic minorities are disproportionately affected by human papillomavirus (HPV)-related cancer, many of which …
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Twitter has been used extensively to understand user’s opinions towards many cultural issues. In this paper, we analyzed the content of …
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To improve influenza vaccination rates, public health officials must understand potential factors in an individual’s decision to get a …
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Social media is becoming a platform of choice for people to voice their opinion on topics of discussion. To evaluate these opinions, it …
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Reducing inappropriate prescribing is key to mitigating antibiotic resistance, particularly in acute care settings. Clinicians’ …
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This study proposes the use of Gab as a vehicle for political science research regarding modern American politics and the Alt-Right …
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In this study, we aim to address two overarching questions: 1) How do expert engineers perceive risks associated with their design …
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Neglecting the social aspect of complex sociotechnical systems can prevent system success. For example, nuclear power plants might have …
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The Engineering Systems (ES) movement set a research agenda that transformed the field of systems engineering. By focusing on complex …
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This white paper argues that response options for aggression in space should be informed by the theory of systems architecture, and …
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Many engineered systems are biologically inspired. In this paper, we examine the structure of the human nervous system with an eye …
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Design decisions often require input from multiple stakeholders or require balancing multiple design requirements. However, leading …
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Technical committees for industry consensus standards involve multiple stakeholders. These stakeholders are experts who assess and …
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Eating disorders (ED) are pervasive and do not discriminate based on race, religion, gender, or SES. Comorbidities include anxiety, …
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Social media provide the potential to keep up with public discussions more quickly, at lower cost, and at potentially higher …
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Introduction: Approximately 23,000 women and 15,793 men in the United States are affected by human papilloma virus (HPV) related …
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Engineers seek to design systems that will produce an intended change in the state of the world. How are we to know if a system will …
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Background Adherence to evidence-based antibiotic therapy guidelines for treatment of upper respiratory tract infections (URIs) varies …
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The dynamics of knowledge transfer is an important topic for engineering managers. In this paper, we study knowledge …
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Demographically-tagged social media messages are a common source of data for computational social science. While these messages can …
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We argue for a scientific approach to combating online misinformation and disinformation. Such an …
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We examine here the dynamics of opinion exchange before a democratic decision-making event by using an agent-based model. The agents …
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The computational study of narrative is important to multiple academic disciplines. However, prior research has been limited by the …
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Flexibility is a major concern in engineering design. This paper examines two complementary approaches to designing flexibility into …
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Traditional data on influenza vaccination has several limitations: high cost, limited coverage of underrepresented groups, and low …
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We argue for a scientific approach to online misinformation and disinformation. Such an approach must be grounded in empirically …
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Recent studies have shown that transportation networks are important in the dissemination of the influenza virus. Moreover, …
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Faculty diversity is a longstanding challenge in the US. However, we lack a quantitative and systemic understanding of how the career …
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Faculty diversity is a longstanding challenge in the US. However, we lack a quantitative and systemic understanding of how the career …
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A system’s architecture defines its flexibility—the ease with which changes to the system’s structure may be made. Systems …
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Fuzzy-trace theory assumes that decision-makers process qualitative “gist” representations and quantitative “verbatim” representations …
PDF Project

The computational study of narrative is important to multiple academic disciplines. However, prior research has been limited by the …
PDF Project Project

Decision-making for system design in the context of high-impact low probability events is challenging because individual cognitive …
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It is important for public health officials to follow both the incidence of disease and the public’s perception of it, especially in …
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Flexibility is a major concern in engineering design. This paper examines two complementary approaches to designing flexibility into …

Vaccine refusal rates have increased in recent years, highlighting the need for effective risk communication, especially over social …
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Scholars have posited that the architecture of a system drives its lifecycle properties. For example, Moses [1] represents “generic …
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Scholars have posited that the architecture of a system drives its lifecycle properties. For example, Moses [1] represents “generic …
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DOI

This study analyzes temporal trends in Twitter data pertaining to both influenza awareness and influenza infection during the 2012–13 …
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We propose a new model of risk preferences that integrates theoretical principles relevant to mental representation, metacognitive …
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One of the key features of systems engineering is the integration of knowledge and expertise across large and diverse expert teams. …
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Eberhardt Rechtin identified four approaches to system design that have come to define the field of systems architecture. Concurrently, …
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Background: Public health officials and policy makers in the United States expend significant resources at the national, state, county, …
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We evaluate the performance of Twitter-based influenza surveillance in ten English-speaking countries across four continents. We find …
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Background: Public health officials and policy makers in the United States expend significant resources at the national, state, county, …
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Background. Extensive use of unnecessary antibiotics has driven the emergence of resistant bacterial strains, posing a threat to public …
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Background. Extensive use of unnecessary antibiotics has driven the emergence of resistant bacterial strains, posing a threat to public …
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Accurate disease forecasts are imperative when preparing for influenza epidemic outbreaks; nevertheless, these forecasts are often …
DOI

Accurate disease forecasts are imperative when preparing for influenza epidemic outbreaks; nevertheless, these forecasts are often …
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In this paper, we develop a novel formalization of Fuzzy Trace Theory (FTT), a leading theory of qualitative risky decision-making. Our …
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In this paper, I conceive of the flow from capabilities, to requirements, to implementations as an abstraction hierarchy. I show that …
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System structure is a key determinant of system behavior. There is a particularly strong link between a system’s structure and its …
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Most leading computational theories of decision-making under risk do not have mechanisms to account for the incorporation of cultural …
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We present HealthTweets.org, a new platform for sharing the latest research results on Twitter data with researchers and public …
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Social media have been proposed as a data source for influenza surveillance because they have the potential to offer real-time access …
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Social media have been proposed as a data source for influenza surveillance because they have the potential to offer real-time access …
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Food and Drug Administration (FDA) advisory committees have a significant influence on patterns of clinical practice worldwide. Recent …
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Food and Drug Administration (FDA) advisory committees have a significant influence on patterns of clinical practice worldwide. Recent …
DOI

A major concern regarding the study of narratives regards how they are indexed and retrieved. This is a question which touches on the …
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The behavior of a complex system in a changing environment is strongly affected by the system’s architecture. We present an …
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Many important technical and policy decisions are made by small groups, especially by deliberative committees of technical experts. …
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Many important technical and policy decisions are made by small groups, especially by deliberative committees of technical experts. …
DOI

This paper presents preliminary results on the extraction of group identities from social media data using topic models and a rich form …
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Decisions by committees of technical experts are increasingly impacting society. These decision-makers are typically embedded within a …
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The social elements of technical decision-making are not well understood, particular among expert committees. This is largely due to a …
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Committees of experts are critical for decision-making in engineering systems. This is because the complexity of these systems requires …
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Negotiators and decision-makers are typically embedded within a web of existing social relations. Taken as a whole, these relations …
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The outcome of an intercultural negotiation often depends on the affinity that each negotiator feels with his or her peers. We take as …
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Engineering systems are complex by definition. Information about these systems must therefore be pooled from multiple technical …
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All sufficiently-complex engineered systems require oversight by committees of technical experts. Decision-making by these expert …
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Understanding group decision-making processes is crucial for design or operation of a complex system. Unfortunately, there are few …
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Topic models may be applied to solve problems of interest to many subfields of social-science. This paper expands the social-science …
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Today’s spacefaring nations lack a systematic framework for evaluating international cooperation proposals that takes both …
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Today’s spacefaring nations lack a systematic framework for evaluating international cooperation proposals that takes both …
DOI

Political and technical concerns are tightly intertwined in the design of modern space systems. The political environment often …
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Political and technical concerns are tightly intertwined in the design of modern space systems. The political environment often …
DOI

The swiftly changing policy environment introduces significant uncertainty into the design of technical systems that rely on public …
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The swiftly changing policy environment introduces significant uncertainty into the design of technical systems that rely on public …
DOI

Success of engineered systems and devices is contingent upon their approval by expert committees. For example, advisory panels to the …
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The presence of space situational awareness is one approach to mitigating the long-term risks associated with space debris in low Earth …
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It is often difficult to forecast the future budgetary environment for today’s space systems. Indeed, multiple NASA missions and …
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Mutual misunderstanding between decision-makers in the political and technical environment leads to programs that experience cost …
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The swiftly changing nature of the policy environment introduces significant uncertainty into the design of those technical systems …
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Current export control policies, drafted during the Cold War, require reassessment in light of fundamental changes in the international …
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This paper summarizes the findings of a comprehensive study commissioned by NASA’s space architect and conducted by graduate students …
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The Aurora Program in Europe and The vision for space exploration in the United States is representative of a shift in space policies …
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The search for evidence of past life is likely to be an important part of Martian exploration. Unfortunately, the number of potentially …
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