Digital Commons Network^™

Investigation Into Reynolds Number Effects On A Biomimetic Flapping Wing, Daniel K. Hope, Anthony M. Deluca, Ryan P. O'Hara

Faculty Publications

This research investigated the behavior of a Manduca sexta inspired biomimetic wing as a function of Reynolds number by measuring the aerodynamic forces produced by varying the characteristic wing length and testing at air densities from atmospheric to near vacuum. A six degree of freedom balance was used to measure forces and moments, while high speed cameras were used to measure wing stroke angle. An in-house created graphical user interface was used to vary the voltage of the drive signal sent to the piezoelectric actuator which determined the wing stroke angle. The Air Force Institute of Technology baseline 50 mm …

Mitogenomic Divergence Between Three Pairs Of Putative Geminate Fishes From Panama, Fernando Alda, Alexandria J. Adams, Prosanta Chakrabarty, W. Owen Mcmillan

Faculty Publications

© 2018, © 2017 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group. We sequenced the complete mitochondrial genomes of three pairs of congeneric peripheral fishes distributed on either side of the Isthmus of Panama in order to test their status as geminate species pairs. Our phylogenetic analysis did not support a sister relationship between Gobiomorus dormitor and G. maculatus and therefore they cannot be considered geminates. The average genetic distance of protein-coding genes between Sicydium altum and S. salvini was more than two times larger than between Atlantic and Pacific Awaous banana, suggesting different timings …

Hydrothermal Stamp On The Oceans, Susan Q. Lang

Faculty Publications

The composition of the oceans is altered by hydrothermal circulation. These chemical factories sustain microbial life, which in turn alters the chemistry of the fuids that enter the ocean. A decade of research details this complex interchange.

Game Spirituality: How Games Tell Us More Than We Might Think, Chad Carlson

Faculty Publications

While we often see games as less serious or at least less transcendental than religion there is reason to believe that games can evoke similarly meaningful narratives that allow us to learn a great deal about ourselves and our world. And games do so often using the same symbolic and metaphorical mechanisms that generate meaning in religious experience. In this paper, I explore some of the ways in which game myths—the myths created from and through games—generate meaning in our lives. People experience myths in games very similarly to how they might in religion. I first explain what myth means …

In Vivo Inhibition Of Tryptophan Catabolism Reorganizes The Tuberculoma And Augments Immune-Mediated Control Of Mycobacterium Tuberculosis, Uma S. Gautam, Taylor W. Foreman, Allison N. Bucsan, Ashley V. Veatch, Xavier Alvarez, Toidi Adekambi, Nadia A. Golden, Kaylee M. Gentry, Lara A. Doyle-Meyers, Kasi E. Russell-Lodrigue, Peter J. Didier, James L. Blanchard, K. Gus Kousoulas, Andrew A. Lackner, Daniel Kalman, Jyothi Rengarajan, Shabaana A. Khader, Deepak Kaushal, Smriti Mehra

Faculty Publications

Mycobacterium tuberculosis continues to cause devastating levels of mortality due to tuberculosis (TB). The failure to control TB stems from an incomplete understanding of the highly specialized strategies that M. tuberculosis utilizes to modulate host immunity and thereby persist in host lungs. Here, we show that M. tuberculosis induced the expression of indoleamine 2,3-dioxygenase (IDO), an enzyme involved in tryptophan catabolism, in macrophages and in the lungs of animals (mice and macaque) with active disease. In a macaque model of inhalation TB, suppression of IDO activity reduced bacterial burden, pathology, and clinical signs of TB disease, leading to increased host …

Hiv-Tb Coinfection Among 57 Million Pregnant Women, Obstetric Complications, Alcohol Use, Drug Abuse, And Depression, Dorian Fernandez, Imoleayo Salami, Janelle Davis, Florence Mbah, Aisha Kazeem, Abreah Ash, Justin Babino, Laquiesha Carter, Jason L. Salemi, Kiara K. Spooner, Omonike A. Olaleye, Hamisu M. Salihu

Faculty Publications

Objective. HIV and tuberculosis represent diseases of major public health importance worldwide. Very little is known about HIV-TB coinfection among pregnant women, especially from industrialized settings. In this study, we examined the association between TB, HIV, and HIV-TB coinfection among pregnant mothers and obstetric complications, alcohol use, drug abuse, and depression. Method. We examined inpatient hospital discharges in the United States from January 1, 2002, through December 31, 2014. We employed multivariable survey logistic regression to generate adjusted estimates for the association between infection status and study outcomes. Results. We analyzed approximately 57 million records of pregnant women and their …

Radial Growth Responses Of Upland Oaks Following Recurrent Restoration Treatments In Northern Mississippi, Kathryn R. Kidd, J. Morgan Varner, J. Stephen Brewer

Faculty Publications

Fire exclusion over the past century has substantially altered composition, structure, and fuel dynamics in upland oak-hickory (Quercus-Carya) forests in the Southeastern United States. Numerous restoration efforts have been made to re-establish historical disturbance regimes into these altered forests. However, our understanding of the implications of restorative disturbances on stand dynamics has primarily been limited to shifts in species composition and post-disturbance regeneration. Therefore, we examined annual radial growth responses of dominant upland oaks following a combination of prescribed fires (2004, 2006, 2008, 2010, 2012, and 2014) and thinning (starting in 2004) treatments (thin+burn) in stands which had previously been …

Step Therapy: Legal And Ethical Implications Of A Cost-Cutting Measure, Sharona Hoffman

Faculty Publications

The very high and ever-increasing costs of medical care in the United States are well-recognized and much discussed. Health insurers have employed a variety of strategies in an effort to control their expenditures, including one that is common but has received relatively little attention: step therapy. Step therapy programs require patients to try less expensive treatments and find them to be ineffective or otherwise problematic before the insurer will approve a more high-priced option. This Article is the first law journal piece dedicated to analyzing this important cost control measure.

The Article explores the strengths and weaknesses of step therapy …

The Roles Of Inter- And Intra-Sexual Selection In Behavioral Isolation Between Native And Invasive Pupfishes, Cory Becher, Jennifer M. Gumm

Faculty Publications

Male-male competition and female mate choice may both play important roles in driving and maintaining reproductive isolation between species. When previously allopatric species come into secondary contact with each other due to introductions, they provide an opportunity to evaluate the identity and strength of reproductive isolating mechanisms. If reproductive isolation is not maintained, hybridization may occur. We examined how reproductive isolating mechanisms mediate hybridization between endemic populations of the Red River pupfish Cyprinodon rubrofluviatilis and the recently introduced sheepshead minnow C. variegatus. In lab-based dominance trials, males of both species won the same number of competitions. However, male C. rubrofluviatilis …

The Effects Of Ultraviolet Light On Anthocyanin Accumulation In The Adventitious Roots Of Sedum Wrightii (Crassulaceae), Lila D. Kerr, Dennis A. Gravatt, Robert J. Wiggers

Faculty Publications

Several studies have supported the idea that anthocyanin accumulation may be a possible protection mechanism in plants against DNA damage caused by ultraviolet radiation (UV). This study explored the accumulation of anthocyanins in the adventitious root tips of Sedum wrightii using the following treatments: UVA, UVA+low UVB, and UVA+high UVB. Following exposure to UV radiation, samples were analyzed for anthocyanin accumulation using an ethanol extraction procedure. Using ELISA, additional root samples were analyzed for indicators of DNA damage: cyclobutane pyrimidine dimers (CPDs) and pyrimidine (6-4) pyrimidone dimers (6-4 PPs). The anthocyanin concentrations were significantly higher in the UVA + high …

Developmentally Appropriate Practice In The 21st Century, Kay Sanders, Flora Farago

Faculty Publications

Developmentally appropriate practice (DAP) is a set of early childhood curricular recommendations published by the National Association for the Education of Young Children (NAEYC). DAP was introduced in the United States in the late 1980s through Bredekamp’s (1987) seminal work, “Developmentally Appropriate Practice in Early Childhood Programs Serving Children from Birth through Age 8.” Since the initial publication, DAP has been widely accepted as the standard for early childhood educational practice in the United States and in Westernized countries around the world. Whereas proponents of DAP assert its positive influence on children, those more critical of DAP question whether it …

Social Medicine And International Expert Networks In Latin America, 1930–1945, Eric D. Carter

Faculty Publications

This paper examines the international networks that influenced ideas and policy in social medicine in the 1930s and 1940s in Latin America, focusing on institutional networks organised by the League of Nations Health Organization, the International Labour Organization, and the Pan-American Sanitary Bureau. After examining the architecture of these networks, this paper traces their influence on social and health policy in two policy domains: social security and nutrition. Closer scrutiny of a series of international conferences and local media accounts of them reveals that international networks were not just ‘conveyor belts’ for policy ideas from the industrialised countries of the …

Sex, Lies, And Ultrasound, B. Jessie Hill

Faculty Publications

State-mandated falsehoods are rampant in the context of abortion regulation. State legislatures have required doctors, before performing abortions, to provide scientifically unsupported information to women, such as that having an abortion increases the risk of breast cancer, or that it has negative mental health effects. Given the lack of evidence to sustain these sorts of claims, it seems reasonable to refer to such statements as government-mandated lies. However, this article argues that government mandated lies in the abortion context are unique in several ways that make them unlikely to be found unconstitutional, despite the fact that they obviously hinder patients’ …

Preparing For The Apocalypse: A Multi-Prong Proposal To Develop Countermeasures For Biological, Chemical, Radiological, And Nuclear Threats, Constance E. Bagley, Anat Alon-Beck

Faculty Publications

The false alarm of an Hawaiian nuclear attack in January 2018 is an example of the lack of U.S. preparedness for attacks using nuclear and other weapons of mass destruction. To address such threats, this Article proposes the establishment of a nation-wide integrated defense of health countermeasures initiative (“DHCI”), which is a multi-prong program to create a defensive triad comprising government, private industry, and academia to develop countermeasures for health threats posed by biological, chemical, radiological, and nuclear (“BCRN”) attacks. Key elements of our multi-faceted proposal include the use of the government’s Other Transaction Authority to simplify procurement arrangements, the …

Big Data Analytics: What Can Go Wrong, Sharona Hoffman

Faculty Publications

It is not uncommon to read that long-held beliefs about medical treatments have been dislodged by new studies. For example, there is now doubt as to whether women should undergo annual mammograms, previously a cornerstone of cancer screening. Hormone replacement therapy for menopausal women, once considered highly suspect in light of worrisome research findings, is now being reconsidered as a beneficial therapy. These reversals trouble and confuse many Americans.

This Article explores why medical research findings can be erroneous and what can go wrong in the process of designing and conducting research studies. It provides readers with essential analytical tools …

Complementary Authority And The One-Way Ratchet: Ecosystem Services Property, Regulation, And Wildlife Conservation, Kalyani Robbins

Faculty Publications

Due to the priorities of the Trump Administration, which are not a great match with those of the conservation community, we find ourselves in a period of rollbacks for all kinds of environmental regulation, including the protection of wildlife. When the federal government fails to adequately regulate, we look to other sources of authority to fill that gap. The first and most obvious place to look is to state and local governments. They are our best hope to avoid hemorrhaging vulnerable species during this presidency. Alas, looking at the realities of state wildlife conservation laws, we see the gaps remain. …

Endocide-Induced Abnormal Growth Forms Of Invasive Giant Salvinia (Salvinia Molesta), Shiyou Li, Ping Wang, Zushang Su, Emily Lozano, Olivia Lamaster, Jason Grogan, Yuhui Weng, Thomas Decker, John Findeisen, Monica Mcgarrity

Faculty Publications

Giant salvinia (Salvinia molesta) is one of the most noxious invasive species in the world. The fern is known to have primary, secondary, and tertiary growth forms, which are also commonly hypothesized as growth stages. The identification of these forms is primarily based on the size and folding status of the floating leaves. However, we identified 12 forms in the greenhouse and the field. Our experiments showed that the folding of floating leaves is a reversible trait dependent on water access. The floating leaves quickly fold in response to water shortage, reducing water loss and needs, decreasing growth, …

Site Factors Influence On Herbaceous Understory Diversity In East Texas Pinus Palustris Savannas, Brooke Mccalip, Brian Oswald, Kathryn R. Kidd, Yuhi Weng, Kenneth Farrish Phd

Faculty Publications

Longleaf pine (Pinus palustris) savannas were once dominant across the southeastern U.S., including East Texas and parts of western and central Louisiana. The diverse understory associated with these historical savannas may occasionally be seen today, but not often in longleaf pine ecosystems. This project aimed to define east Texas site characteristics that are necessary to support these ecosystems with a dense and diverse herbaceous understory with little to no midstory cover. Fifty-nine plots across three study sites were established to evaluate the influence of overstory cover, basal area, aspect, elevation, and slope on the number of plant genera present. Forest …

Surface And Subsurface Tillage Effects On Mine Soil Properties And Vegetative Response, H. Z. Angel, Jeremy Stovall, Hans Michael Williams, Kenneth W. Farrish, Brian P. Oswald, J. L. Young

Faculty Publications

Soil compaction is an important concern for surface mine operations that require heavy equipment for land reclamation. Excessive use of rubber-tired equipment, such as scraper pans, may cause mine soil compaction and hinder the success of revegetation efforts. However, information is limited on management strategies for ameliorating the potential compacting effects of scraper pans, particularly during site preparation for loblolly pine (Pinus taeda L.) plantations. Three forms of tillage and one control were replicated five times on surface mined land in the west Gulf Coastal Plain: no tillage (NT), disking (D), single-ripping + disking (R+D), and cross-ripping + disking …

Food Habits Of Sympatric Pitvipers From The West Gulf Coastal Plain, Usa, Christopher M. Schalk, Toni Trees, Joshua B. Pierce, D. Craig Rudolph

Faculty Publications

Widespread species that occupy multiple communities exhibit geographic variation in their natural history due to the ecological context of the local community. An animal’s food habitats are a central component to understanding its natural history and ecological role within its community—information that is critical to understanding resource needs of a species, mechanisms of species coexistence, and energy flow in food webs (Litvaitis 2000; Schalk et al. 2014). This information is also crucial for predicting the response of populations to changes in resource availability and, if necessary, inform mitigation strategies (Holycross and Mackessy 2002)

De-Extinction And The Conception Of Species, Leonard Finkelman

Faculty Publications

Developments in genetic engineering may soon allow biologists to clone organisms from extinct species. The process, dubbed “de-extinction,” has been publicized as a means to bring extinct species back to life. For theorists and philosophers of biology, the process also suggests a thought experiment for the ongoing “species problem”: given a species concept, would a clone be classified in the extinct species? Previous analyses have answered this question in the context of specific de-extinction technologies or particular species concepts. The thought experiment is given more comprehensive treatment here. Given the products of three de-extinction technologies, twenty-two species concepts are “tested” …

Modeling The Disappearance Of The Neanderthals Using Concepts Of Population Dynamics And Ecology, Michael F. Roberts, Stephen E. Bricher

Faculty Publications

Current hypotheses regarding the disappearance of Neanderthals (NEA) in Europe fall into two main categories: climate change, and competition. Here we review current research and existing mathematical models that deal with this question, and we propose an approach that incorporates and permits the investigation of the current hypotheses. We have developed a set of differential equations that model population dynamics of anatomically modern humans (AMH) and NEA, their ecological relations to prey species, and their mutual interactions. The model allows investigators to explore each of the two main categories or combinations of both, as well as various forms of competition …

Overview Of Big-Data-Intensive Storage And Its Technologies, Richard S. Segall, Jeffrey S. Cook

Faculty Publications

This chapter deals with a detailed discussion on the storage systems for data-intensive computing using Big Data. The chapter begins with a brief introduction about data-intensive computing and types of parallel processing approaches. It also highlights the points that display how data-intensive computing systems differ from other forms of computing. A discussion on the importance of Big Data computing is put forth. The current and future challenges of storage in genomics are discussed in detail. Also, storage and data management strategies are given. The chapter's focus is then on the software challenges for storage. Storage use cases are provided like …

Response To The Letter To The Editor On Turner (2017), R. Eugene Turner

Faculty Publications

No abstract provided.

Seasonal Trends In Surface Pco2 And Air-Sea Co2 Fluxes In Apalachicola Bay, Florida, From Viirs Ocean Color, I.D. Joshi, N.D. Ward, E.J. D'Sa, C.L. Osburn, T.S. Bianchi, D. Oviedo-Vargas

Faculty Publications

No abstract provided.

Geomorphic Influences On The Contribution Of Vegetation To Soil C Accumulation And Accretion In Spartina Alterniflora Marshes, Tracy Elsey-Quirk, Viktoria Unger

Faculty Publications

No abstract provided.

Drivers Of Oxygen Consumption In The Northern Gulf Of Mexico Hypoxic Waters—A Stable Carbon Isotope Perspective, H. Wang, X. Hu, N.N. Rabalais, J. Brandes

Faculty Publications

No abstract provided.

Declining Oxygen In The Global Ocean And Coastal Waters, D. Breitburg, L.A. Levin, A. Oschlies, M. Grégoire, F.P. Chavez, D.J. Conley, V. Garçon, D. Gilbert, D. Gutiérrez, K. Isensee, G.S. Jacinto, K.E. Limburg, I. Montes, S.W.A. Naqvi, G.C. Pitcher, N.N. Rabalais, M.R. Roman, K.A. Rose, B.A. Seibel, M. Telszewski, M. Yasuhara, J. Zhang

Faculty Publications

No abstract provided.

Walleye Recruitment Success Is Less Resilient To Warming Water Temperatures In Lakes With Abundant Largemouth Bass Populations, Gretchen J.A. Hansen, Stephen R. Midway, Tyler Wagner

Faculty Publications

Lakes respond heterogeneously to climate, with implications for fisheries management. We analyzed walleye (Sander vitreus) recruitment to age-0 in 359 lakes in Wisconsin, USA, to (i) quantify the relationship between annual water temperature degree days (DD) and walleye recruitment success and (ii) identify the influence of lake characteristics - area, conductivity, largemouth bass (Micropterus salmoides) catch rates, and mean DD - on this relationship. The relationship between walleye recruitment and annual DD varied among lakes and was not distinguishable from zero overall (posterior mean = -0.11, 90% CI = -0.34, 0.15). DD effects on recruitment were negative in 198 lakes …

Impact Of Seabed Resuspension On Oxygen And Nitrogen Dynamics In The Northern Gulf Of Mexico: A Numerical Modeling Study, J.M. Moriarty, C.K. Harris, M.A.M. Friedrichs, K. Fennel, K. Xu

Faculty Publications

No abstract provided.