Digital Commons Network^™

Identifying Missing Dictionary Entries With Frequency-Conserving Context Models, Jake Ryland Williams, Eric M. Clark, James P. Bagrow, Christopher M. Danforth, Peter Sheridan Dodds

College of Engineering and Mathematical Sciences Faculty Publications

In an effort to better understand meaning from natural language texts, we explore methods aimed at organizing lexical objects into contexts. A number of these methods for organization fall into a family defined by word ordering. Unlike demographic or spatial partitions of data, these collocation models are of special importance for their universal applicability. While we are interested here in text and have framed our treatment appropriately, our work is potentially applicable to other areas of research (e.g., speech, genomics, and mobility patterns) where one has ordered categorical data (e.g., sounds, genes, and locations). Our approach focuses on the phrase …

Characterizing The Google Books Corpus: Strong Limits To Inferences Of Socio-Cultural And Linguistic Evolution, Eitan Adam Pechenick, Christopher M. Danforth, Peter Sheridan Dodds

College of Engineering and Mathematical Sciences Faculty Publications

It is tempting to treat frequency trends from the Google Books data sets as indicators of the "true" popularity of various words and phrases. Doing so allows us to draw quantitatively strong conclusions about the evolution of cultural perception of a given topic, such as time or gender. However, the Google Books corpus suffers from a number of limitations which make it an obscure mask of cultural popularity. A primary issue is that the corpus is in effect a library, containing one of each book. A single, prolific author is thereby able to noticeably insert new phrases into the Google …

Effects Of Skeletal Streetscape Design On Perceived Safety, Chester Harvey, Lisa Aultman-Hall, Stephanie E. Hurley, Austin Troy

College of Agriculture and Life Sciences Faculty Publications

It is important for planners and urban designers to understand how physical characteristics of urban streetscapes contribute to perceptions of them as safe, comfortable urban spaces. While urban design theory offers numerous suggestions for successful streetscapes there is meager empirical evidence of their effects. We suggest that this is largely due to precision and sample size limitations on audit-based physical design and human perception measurements. This paper overcomes these limitations by identifying a key set of "streetscape skeleton" design variables that can be efficiently measured using a GIS-based method. It then measures these variables on a large and diverse sample …

If You've Seen One Worm, Have You Seen Them All? Spatial, Community, And Genetic Variability Of Tubificid Communities In Montana, Nilanjan Lodh, Donna M. Rizzo, Billie L. Kerans, Stephanie Mcginnis, Nikolaos Fytilis, Lori Stevens

College of Engineering and Mathematical Sciences Faculty Publications

Genetic studies are recognized increasingly as important for understanding naturally occurring disease dynamics and are used to predict host genetic diversity and coevolutionary processes and to identify species composition in ecological communities. Tubifex tubifex, the definitive host of the whirling disease parasite Myxobolus cerebralis, comprises 6 known lineages that vary widely in parasite susceptibility. We used 16S ribosomal DNA (16S rDNA) to identify relationships among genetic variability of 3 oligochaete genera (T. tubifex, Rhyacodrilus spp., and Ilyodrilus spp.; Oligochaeta:Tubificidae), oligochaete assemblage composition, and the presence of whirling disease in 9 locations across 4 watersheds in Montana, USA. We assessed genetic …

Climate Change Sentiment On Twitter: An Unsolicited Public Opinion Poll, Emily M. Cody, Andrew J. Reagan, Lewis Mitchell, Peter Sheridan Dodds, Christopher M. Danforth

College of Engineering and Mathematical Sciences Faculty Publications

The consequences of anthropogenic climate change are extensively debated through scientific papers, newspaper articles, and blogs. Newspaper articles may lack accuracy, while the severity of findings in scientific papers may be too opaque for the public to understand. Social media, however, is a forum where individuals of diverse backgrounds can share their thoughts and opinions. As consumption shifts from old media to new, Twitter has become a valuable resource for analyzing current events and headline news. In this research, we analyze tweets containing the word "climate" collected between September 2008 and July 2014. Through use of a previously developed sentiment …

Zipfs Law Holds For Phrases, Not Words, Jake Ryland Williams, Paul R. Lessard, Suma Desu, Eric M. Clark, James P. Bagrow, Christopher M. Danforth, Peter Sheridan Dodds

College of Engineering and Mathematical Sciences Faculty Publications

With Zipfs law being originally and most famously observed for word frequency, it is surprisingly limited in its applicability to human language, holding over no more than three to four orders of magnitude before hitting a clear break in scaling. Here, building on the simple observation that phrases of one or more words comprise the most coherent units of meaning in language, we show empirically that Zipfs law for phrases extends over as many as nine orders of rank magnitude. In doing so, we develop a principled and scalable statistical mechanical method of random text partitioning, which opens up a …

Impacts Of Community-Based Natural Resource Management On Wealth, Food Security And Child Health In Tanzania, Sharon Pailler, Robin Naidoo, Neil D. Burgess, Olivia E. Freeman, Brendan Fisher

Rubenstein School of Environment and Natural Resources Faculty Publications

Community-based natural resource management (CBNRM) is a major global strategy for enhancing conservation outcomes while also seeking to improve rural livelihoods; however, little evidence of socioeconomic outcomes exists. We present a national-level analysis that empirically estimates socioeconomic impacts of CBNRM across Tanzania, while systematically controlling for potential sources of bias. Specifically, we apply a difference-indifferences model to national-scale, cross-sectional data to estimate the impact of three different CBNRM governance regimes on wealth, food security and child health, considering differential impacts of CBNRM on wealthy and poor populations. We also explore whether or not longer-standing CBNRM efforts provide more benefits than …

Notes From The Field: Lessons Learned From Using Ecosystem Service Approaches To Inform Real-World Decisions, Mary Ruckelshaus, Emily Mckenzie, Heather Tallis, Anne Guerry, Gretchen Daily, Peter Kareiva, Stephen Polasky, Taylor Ricketts, Nirmal Bhagabati, Spencer A. Wood, Joanna Bernhardt

Rubenstein School of Environment and Natural Resources Faculty Publications

While there have been rapid advances in assessments of biodiversity and ecosystem services (BES), a critical remaining challenge is how to move from scientific knowledge to real-world decision making. We offer 6 lessons from our experiences applying new approaches and tools for quantifying BES in 20 pilot demonstrations: (1) Applying a BES approach is most effective in leading to policy change as part of an iterative science-policy process; (2) simple ecological production function models have been useful in a diverse set of decision contexts, across a broad range of biophysical, social, and governance systems. Key limitations of simple models arise …

Food Safety Education And Disparities In North Carolina Emergency Food, Ashley Chaifetz, Benjamin Chapman

Food Systems Summit 2015

Each year, an estimated 48 million Americans (1 in 6) contract foodborne illness (Scallan, 2011) stemming from grocery stores, hospitals, day care centers, church banquets, county fairs, restaurants, private homes, schools, and even food banks (CDC FOOD, 2011). However, little research has explored the potential connection between food-insecure populations and risk of foodborne illness, especially for emergency foods (c.f. Henley et al., 2012; Koro et al., 2010; Quinlan, 2013). For the majority of people who seek food assistance, food pantries are a fixed part of food sources; that is, the pantries are for subsistence and no longer just “emergency food” …

Reply To Garcia Et Al.: Common Mistakes In Measuring Frequency-Dependent Word Characteristics, Peter Sheridan Dodds, Eric M. Clark, Suma Desu, Morgan R. Frank, Andrew J. Reagan, Jake Ryland Williams, Lewis Mitchell, Kameron Decker Harris, Isabel M. Kloumann, James P. Bagrow, Karine Megerdoomian, Matthew T. Mcmahon, Brian F. Tivnan, Christopher M. Danforth

College of Engineering and Mathematical Sciences Faculty Publications

No abstract provided.

Text Mixing Shapes The Anatomy Of Rank-Frequency Distributions, Jake Ryland Williams, James P. Bagrow, Christopher M. Danforth, Peter Sheridan Dodds

College of Engineering and Mathematical Sciences Faculty Publications

Natural languages are full of rules and exceptions. One of the most famous quantitative rules is Zipf's law, which states that the frequency of occurrence of a word is approximately inversely proportional to its rank. Though this "law" of ranks has been found to hold across disparate texts and forms of data, analyses of increasingly large corpora since the late 1990s have revealed the existence of two scaling regimes. These regimes have thus far been explained by a hypothesis suggesting a separability of languages into core and noncore lexica. Here we present and defend an alternative hypothesis that the two …

Robustness Of Spatial Micronetworks, Thomas C. Mcandrew, Christopher M. Danforth, James P. Bagrow

College of Engineering and Mathematical Sciences Faculty Publications

Power lines, roadways, pipelines, and other physical infrastructure are critical to modern society. These structures may be viewed as spatial networks where geographic distances play a role in the functionality and construction cost of links. Traditionally, studies of network robustness have primarily considered the connectedness of large, random networks. Yet for spatial infrastructure, physical distances must also play a role in network robustness. Understanding the robustness of small spatial networks is particularly important with the increasing interest in microgrids, i.e., small-area distributed power grids that are well suited to using renewable energy resources. We study the random failures of links …

Participation And Contribution In Crowdsourced Surveys, Robert Swain, Alex Berger, Josh Bongard, Paul Hines

College of Engineering and Mathematical Sciences Faculty Publications

This paper identifies trends within and relationships between the amount of participation and the quality of contributions in three crowdsourced surveys. Participants were asked to perform a collective problem solving task that lacked any explicit incentive: they were instructed not only to respond to survey questions but also to pose new questions that they thought might-if responded to by others-predict an outcome variable of interest to them. While the three surveys had very different outcome variables, target audiences, methods of advertisement, and lengths of deployment, we found very similar patterns of collective behavior. In particular, we found that: the rate …

Nutrition-Related Policy And Environmental Strategies To Prevent Obesity In Rural Communities: A Systematic Review Of The Literature, 2002-2013, Larissa Calancie, Jennifer Leeman, Stephanie B. Jilcott Pitts, Laura Kettel Khan, Sheila Fleischhacker, R. Evenson Kelly, Michelle Schreiner, Carmen Byker, Clint Owens, Jared Mcguirt, Ellen Barnidge, Wesley Dean, Donna Johnson, Jane Kolodinsky, Emily Piltch, Courtney Pinard, Emilee Quinn, Lauren Whetstone, Alice Ammerman

College of Agriculture and Life Sciences Faculty Publications

Introduction Residents of rural communities in the United States are at higher risk for obesity than their urban and suburban counterparts. Policy and environmental-change strategies supporting healthier dietary intake can prevent obesity and promote health equity. Evidence in support of these strategies is based largely on urban and suburban studies; little is known about use of these strategies in rural communities. The purpose of this review was to synthesize available evidence on the adaptation, implementation, and effectiveness of policy and environmental obesity-prevention strategies in rural settings. Methods The review was guided by a list of Centers for Disease Control and …

Human Language Reveals A Universal Positivity Bias, Peter Sheridan Dodds, Eric M. Clark, Suma Desu, Morgan R. Frank, Andrew J. Reagan, Jake Ryland Williams, Lewis Mitchell, Kameron Decker Harris, Isabel M. Kloumann, James P. Bagrow, Karine Megerdoomian, Matthew T. Mcmahon, Brian F. Tivnan, Christopher M. Danforth

College of Engineering and Mathematical Sciences Faculty Publications

Using human evaluation of 100,000 words spread across 24 corpora in 10 languages diverse in origin and culture, we present evidence of a deep imprint of human sociality in language, observing that (i ) the words of natural human language possess a universal positivity bias, (ii ) the estimated emotional content of words is consistent between languages under translation, and (iii ) this positivity bias is strongly independent of frequency of word use. Alongside these general regularities, we describe interlanguage variations in the emotional spectrum of languages that allow us to rank corpora. We also show how our word evaluations …

Do Pollinators Contribute To Nutritional Health?, Alicia M. Ellis, Samuel S. Myers, Taylor H. Ricketts

Rubenstein School of Environment and Natural Resources Faculty Publications

Despite suggestions that animal pollinators are crucial for human nutritional health, no studies have actually tested this claim. Here, we combined data on crop pollination requirements, food nutrient densities, and actual human diets to predict the effects of pollinator losses on the risk of nutrient deficiency. In four developing countries and across five nutrients, we found that 0 to 56% of populations would become newly at risk if pollinators were removed. Increases in risk were most pronounced for vitamin A in populations with moderate levels of total nutrient intake. Overall, the effects of pollinator decline varied widely among populations and …

Mainstreaming Early Warning Systems In Development And Planning Processes: Multilevel Implementation Of Sendai Framework In Indus And Sahel, Asim Zia, Courtney Hammond Wagner

College of Agriculture and Life Sciences Faculty Publications

The third UN World Congress on Disaster Risk Reduction, held in Sendai, Japan in March 2015, agreed on a new framework to guide disaster risk reduction policy and practice for the next 15 years. The Sendai Framework for Disaster Risk Reduction 2015–2030 (SFDRR) leaves important implementation issues unspecified and potentially creates both problems and opportunities for complex, multilevel governance systems in coping with hazards and disastrous events. Early warning systems (EWS), if built into the mainstream of planning for development and disaster relief and recovery, could present a significant opportunity to realize many SFDRR goals. We explore the complexities of …

Are Conservation Organizations Configured For Effective Adaptation To Global Change?, Paul R. Armsworth, Eric R. Larson, Stephen T. Jackson, Dov F. Sax, Paul Simonin, Bernd Blossey, Nancy Green, Mary L. Klein, Liza Lester, Taylor H. Ricketts, Michael C. Runge, M. Rebecca Shaw

Rubenstein School of Environment and Natural Resources Faculty Publications

© The Ecological Society of America. Conservation organizations must adapt to respond to the ecological impacts of global change. Numerous changes to conservation actions (eg facilitated ecological transitions, managed relocations, or increased corridor development) have been recommended, but some institutional restructuring within organizations may also be needed. Here we discuss the capacity of conservation organizations to adapt to changing environmental conditions, focusing primarily on public agencies and nonprofits active in land protection and management in the US. After first reviewing how these organizations anticipate and detect impacts affecting target species and ecosystems, we then discuss whether they are sufficiently flexible …

Social Entrepreneurship And Social Business: Retrospective And Prospective Research, Edgard Barki, Graziella Comini, Ann Cunliffe, Stuart Hart, Sudhanshu Rai

Grossman School of Business Faculty Publications

Social Entrepreneurship and Social Business (SE/SB), inclusive business, businesses with social impact and a higher purpose are becoming increasingly important both in academia and the business world (Sassmannshausen & Volkmann, 2013). Since the influential article by Dees (1998), many different perspectives about social entrepreneurship and social business have been discussed in academia. On the management side, these types of businesses have also proliferated in the last decades. Yunus with his work leading Grameen Bank has inspired many other entrepreneurs and organizations to create a new kind of business more embedded with a social purpose. The main purpose of the Social …

Becoming Transdisciplinary: Exploring Process In A Research Initiative On Climate Change, Emil Tsao

Graduate College Dissertations and Theses

The subject of this case study is the Vermont Agricultural Resilience in a Changing Climate initiative, a transdisciplinary research team at UVM that has maintained success in meeting research and outreach objectives despite collaborating in a way that does not follow any particular ideal-type transdisciplinary process. In following recent science and technology (STS) studies' accounts of cross-disciplinary collaboration, the hypothesis pursued is that the transdisciplinary study of messy or "wicked" problems like climate change brings forth an array of responses from researchers whose disciplinary backgrounds already position them to pursue their research differently, particularly when they involve outside stakeholders in …

Multi-Sensory Stimulation Environments For Use With Dementia Patients: Staff Perspectives On Reduction Of Agitation And Negative Behaviors, Megan Houston

Graduate College Dissertations and Theses

Background: Dementia is a degenerative neurological disorder that afflicts a growing proportion of the global population. Complementary alternative medicine (CAM) modalities are under investigation for their therapeutic value in the management of dementia.

Purpose: Nursing care of dementia sufferers can include managing agitation and negative behaviors; this study investigates staff appraisal of the Multi-Sensory Stimulation Environment (MSSE) as an intervention for these nursing challenges.

Methods: A purposive sample of nursing staff employed in residential care for dementia patients were recruited 10 weeks after the initiation of an open-access MSSE at the facility to complete a confidential self-administered questionnaire.

Results: 79% …

Discourse As Social Process In Outdoor Recreation And Natural Resource Management: Arguing, Constructing, And Performing, Monika Marie Derrien

Graduate College Dissertations and Theses

This dissertation examines the language-based, discursive processes through which meanings and experiences are socially constituted in outdoor recreation and natural resource environments. Language use and discourse are seen as interactive, constructive processes, approached through the theoretical perspectives of argumentation, social constructionism, and performance.

Three qualitative studies, based in data collected at Acadia National Park and forest-related sites throughout Vermont, comprise this dissertation. The first study uses rhetorical analysis to examine the ways National Park Service managers and community leaders argue for the meanings and management of dark night skies in and around Acadia. The second study examines how national park …

Pleistocene Relative Sea Levels In The Chesapeake Bay Region And Their Implications For The Next Century, Benjamin D. Dejong, Paul R. Bierman, Wayne L. Newell, Tammy M. Rittenour, Shannon A. Mahan, Greg Balco, Dylan H. Rood

College of Arts and Sciences Faculty Publications

Today, relative sea-level rise (3.4 mm/yr) is faster in the Chesapeake Bay region than any other location on the Atlantic coast of North America, and twice the global average eustatic rate (1.7 mm/yr). Dated interglacial deposits suggest that relative sea levels in the Chesapeake Bay region deviate from global trends over a range of timescales. Glacio-isostatic adjustment of the land surface from loading and unloading of continental ice is likely responsible for these deviations, but our understanding of the scale and timeframe over which isostatic response operates in this region remains incomplete because dated sea-level proxies are mostly limited to …

Health, Wealth, And Education: The Socioeconomic Backdrop For Marine Conservation In The Developing World, Brendan Fisher, Alicia M. Ellis, Diane K. Adams, Helen E. Fox, Elizabeth R. Selig

Rubenstein School of Environment and Natural Resources Faculty Publications

Interacting drivers and pressures in many parts of the world are greatly undermining the long-term health and wellbeing of coastal human populations and marine ecosystems. However, we do not yet have a well-formed picture of the nature and extent of the human poverty of coastal communities in these areas. In this paper, we begin to fill the gap and present a multidimensional picture of the wellbeing of coastal communities, using nationally representative survey data to examine the health, wealth, and educational status of households in over 38000 communities across 38 developing countries. In general, we found high levels of poverty …

A Protocol For Eliciting Nonmaterial Values Through A Cultural Ecosystem Services Frame, Rachelle K. Gould, Sarah C. Klain, Nicole M. Ardoin, Terre Satterfield, Ulalia Woodside, Neil Hannahs, Gretchen C. Daily, Kai M. Chan

Rubenstein School of Environment and Natural Resources Faculty Publications

Conservation Biology published by Wiley Periodicals, Inc. on behalf of Society for Conservation Biology. Stakeholders' nonmaterial desires, needs, and values often critically influence the success of conservation projects. These considerations are challenging to articulate and characterize, resulting in their limited uptake in management and policy. We devised an interview protocol designed to enhance understanding of cultural ecosystem services (CES). The protocol begins with discussion of ecosystem-related activities (e.g., recreation, hunting) and management and then addresses CES, prompting for values encompassing concepts identified in the Millennium Ecosystem Assessment (2005) and explored in other CES research. We piloted the protocol in Hawaii …

Management By Crisis: Land Trust Conservation Engagement And Methods In Vermont, Louise Sopher Lintilhac

Graduate College Dissertations and Theses

Planning a future for the landscapes we live in can be a daunting challenge for many communities in Vermont. Conservation initiatives affect the quality of life for all community members and can be difficult if not impossible to change in the event of poor planning. Through examining stakeholder relationships with land trusts I have explored the complexities of planning processes used by land trusts in Vermont for conservation initiatives

The study involved one statewide land trust, the Vermont Land Trust, and two community land trusts, the Stowe Land Trust and the Duxbury Land Trust. I used qualitative methods including document …

Organic Chemical Characterization Of Primary And Secondary Biodiesel Exhaust Particulate Matter, John Kasumba

Graduate College Dissertations and Theses

Biodiesel use and production has significantly increased in the United States and in other parts of the world in the past decade. This change is driven by energy security and global climate legislation mandating reductions in the use of petroleum-based diesel. Recent air quality research has shown that emission of some pollutants such as CO, particulate matter (PM), SO2, hydrocarbons, and carcinogenic polycyclic aromatic hydrocarbons (PAHs) is greatly reduced with biodiesel. However, studies have also shown that some unregulated emissions, such as gas-phase carbonyls, are increased with biodiesel combustion. Very limited research has been done to investigate the particle-phase carbonyl …

Short Food Supply Chains: Expectations And Reality, Richard Roberto Richards

Graduate College Dissertations and Theses

Alternative food systems (AFSs) are so defined because they purport to challenge a value or ameliorate a negative impact of the dominant conventional food system (CFS). Short food supply chains (SFSCs) are a type of AFS whose alterity is defined by socially proximal economic exchanges that are embedded in and regulated by social relationships. This relational closeness is argued to have benefits with respect to economic, environmental, and social sustainability. However, it would be a mistake to assume that AFSs and CFSs are paradigmatically differentiated or that their structures engender particular outcomes.

The first article traces a misguided attempt to …