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Articles 1 - 7 of 7
Full-Text Articles in Life Sciences
Classification Of Planetary Craters Using Outline-Based Morphometrics, Thomas J. Slezak, Jani Radebaugh, Eric H. Christiansen, Mark C. Belk
Classification Of Planetary Craters Using Outline-Based Morphometrics, Thomas J. Slezak, Jani Radebaugh, Eric H. Christiansen, Mark C. Belk
Faculty Publications
The morphologies of craters on planetary surfaces reveal clues about the geologic mechanisms by which they originate and subsequently evolve, as well as the materials and physical variables inherent to the environment in which they formed. We carried out a quantitative multivariate analysis of shape descriptors derived from the outlines of craters formed by volcanic processes on Mars, Io, and Earth and by impact cratering on the Moon using elliptic Fourier analysis (EFA) and the Zahn-Roskies (Z-R) shape function. Canonical variate analysis (CVA) was used to construct a statistical model of differences between the crater groups to classify …
Predators As Agents Of Selection And Diversification, Jerald B. Johnson, Mark C. Belk
Predators As Agents Of Selection And Diversification, Jerald B. Johnson, Mark C. Belk
Faculty Publications
Predation is ubiquitous in nature and can be an important component of both ecological and evolutionary interactions. One of the most striking features of predators is how often they cause evolutionary diversification in natural systems. Here, we review several ways that this can occur, exploring empirical evidence and suggesting promising areas for future work. We also introduce several papers recently accepted in Diversity that demonstrate just how important and varied predation can be as an agent of natural selection. We conclude that there is still much to be done in this field, especially in areas where multiple predator species prey …
Comparative Efficacies Of Calmare Therapy And Transcutaneous Electrical Nerve Stimulation In Randomized Peripheral Neuropathy Subjects With Resting State Fmri Monitoring, Ty A. Bodily, Logan Edvalson, Jordan B. Peacock, Zack M. Bradshaw, Carson Hart, Cameron Ernst, Samuel Biggs, David D. Busath
Comparative Efficacies Of Calmare Therapy And Transcutaneous Electrical Nerve Stimulation In Randomized Peripheral Neuropathy Subjects With Resting State Fmri Monitoring, Ty A. Bodily, Logan Edvalson, Jordan B. Peacock, Zack M. Bradshaw, Carson Hart, Cameron Ernst, Samuel Biggs, David D. Busath
Faculty Publications
Clinical reports of Calmare protocol efficacy suggest enhanced durability compared to TENS and the possibility changes in resting fMRI connectivity. The objective was to compare peripheral neuropathy pain relief and resting fMRI changes with Calmare and TENS treatments. Randomized double-blind trials performed in August 2015 and between August 2016 and November 2017, with 18 and 20 human peripheral neuropathy subjects, respectively. The initial trial examined effects of a single session while the latter trial examined the effects of a course of ten treatment sessions on consecutive weekdays. fMRI scans were examined for changes in blood flow correlations and connectivity. Subjective …
Hydroxychloroquine Prophylaxis For Covid-19, David D. Busath
Hydroxychloroquine Prophylaxis For Covid-19, David D. Busath
Faculty Publications
It is common in medicine that simple, inexpensive remedies are held hostage to medical prejudice, financial or political interest, and legal precedent. The purpose of this review is to take the point of view of the victims of COVID-19 and address whether scientific information, including randomized-control trials, can answer whether the hydroxychloroquine should be dispensed for those testing positive and their immediate recent contacts at the point of testing. Although the FDA in the United States is yet to be convinced, the demonstration of positive effects in clinical trials cannot be ignored and there is a large amount of information …
Morphometric Response Of Galaxias Maculatus (Jenyns) To Lake Colonization In Chile, Margaret Mercer, Peter C. Searle, Roberto Cifuentes, Evelyn Habit, Mark C. Belk
Morphometric Response Of Galaxias Maculatus (Jenyns) To Lake Colonization In Chile, Margaret Mercer, Peter C. Searle, Roberto Cifuentes, Evelyn Habit, Mark C. Belk
Faculty Publications
Body and head shape in fish responds to environmental factors such as water flow rate, food sources, and niche availability. However, the way in which fish respond to these environmental factors varies. In Central Chile, multiple river and lake systems along the coast provide an ideal study site to investigate these types of shape changes. We use geometric morphometrics to characterize shape differences in Galaxias maculatus (Jenyns) between river and lake populations. Lake fish converge on a shape with a more fusiform body, narrower head, and larger eyes, while river fish have a more robust body, rounder head, and smaller …
Life History Divergence In Livebearing Fishes In Response To Predation: Is There A Microevolution To Macroevolution Barrier?, Mark C. Belk, Spencer J. Ingley, Jerald B. Johnson
Life History Divergence In Livebearing Fishes In Response To Predation: Is There A Microevolution To Macroevolution Barrier?, Mark C. Belk, Spencer J. Ingley, Jerald B. Johnson
Faculty Publications
A central problem in evolutionary biology is to determine whether adaptive phenotypic variation within species (microevolution) ultimately gives rise to new species (macroevolution). Predation environment can select for trait divergence among populations within species. The implied hypothesis is that the selection resulting from predation environment that creates population divergence within species would continue across the speciation boundary such that patterns of divergence after speciation would be a magnified accumulation of the trait variation observed before speciation. In this paper, we test for congruence in the mechanisms of microevolution and macroevolution by comparing the patterns of life history divergence among three …
Defining Parental Resistance: The Social Determinants Of Measles Vaccine Hesitancy, Michael C. Goates, M. Lelinneth B. Novilla, Mallory Showalter, L. Kirsten Novilla, Russell Doria, Michael Dang, Tyler Leffler, Katelyn Aldridge
Defining Parental Resistance: The Social Determinants Of Measles Vaccine Hesitancy, Michael C. Goates, M. Lelinneth B. Novilla, Mallory Showalter, L. Kirsten Novilla, Russell Doria, Michael Dang, Tyler Leffler, Katelyn Aldridge
Faculty Publications
The increase in vaccine-preventable disease (VPD) outbreaks has caused great alarm to the public health community. In recent years, VPD outbreaks have occurred across the globe in both developed and developing countries. Particularly troubling has been the resurgence of diseases formerly eradicated through years of concerted vaccination and other public health campaigns. Higher vaccination exemption rates have been implicated in the resurgence of VPDs. This is particularly evident in the United States where measles outbreaks reached 1,250 individual cases in 2019 alone, the most confirmed cases since 1992. Central to the discussion about measles resurgence is a better understanding of …