2,042 research outputs found
Farm ponds of the eastern Great Plains: Key challenges and opportunities for conserving amphibians in these novel ecosystems
No full textFarm ponds are numerous in the agricultural landscapes of the Eastern Great Plains of the United States. These ponds are constructed to support a variety of functions, including erosion control, cattle grazing, and recreational fishing, but their role in supporting native biodiversity, including amphibians, remains poorly understood. In addition, it is unclear how farm ponds fit into existing frameworks of restoration and conservation. Despite their abundance, there are no large-scale initiatives in place to enhance the biodiversity value of farm ponds in the United States. Emerging frameworks like the novel ecosystems concept could provide a path forward for farm pond conservation, but the concept remains controversial and its applicability largely untested.
Consequently, my goal was to address both the ecological and philosophical aspects of farm ponds as refuges for biodiversity in agricultural landscapes. First, I sought to identify the important biophysical components of amphibian breeding habitat in farm ponds and assess the species-specific effects of cattle and fish presence. I then used a chronosequence approach to determine whether pond renovation, which often occurs when ponds are 35 years old, threatens the development of amphibian habitat. I found that farm ponds support amphibian reproduction, but habitat use varied by species, underscoring the importance of species-specific approaches. In addition, pond renovation threatens the development of pH, pond slope, and emergent vegetation conditions predictive of amphibian breeding. Moving forward, it will be important to develop ecological and conceptual approaches to balance the agricultural and biodiversity values of these sites. By enabling us to explicitly acknowledge the anthropogenic nature of farm ponds without disregarding them as ‘degraded’, the novel ecosystems concept provides a framework for articulating the conservation value of these ecosystems.Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2020-08-01The student, Timothy Swartz, accepted the attached license on 2018-07-10 at 09:20.The student, Timothy Swartz, submitted this Thesis for approval on 2018-07-10 at 09:21.This Thesis was approved for publication on 2018-07-10 at 15:14.DSpace SAF Submission Ingestion Package generated from Vireo submission #12791 on 2018-09-27 at 11:36:31Made available in DSpace on 2018-09-27T16:47:27Z (GMT). No. of bitstreams: 2
SWARTZ-THESIS-2018.pdf: 8836083 bytes, checksum: 70b9b539eb17c86b366238469f70f0e4 (MD5)
LICENSE.txt: 4211 bytes, checksum: 7ab5b80d04d1b44ac42c01eceeaf4630 (MD5)
Previous issue date: 2018-07-10Embargo set by: Seth Robbins for item 107904
Lift date: 2020-09-27T16:47:41Z
Reason: Author requested closed access (OA after 2yrs) in Vireo ETD systemLimited Restriction Lifted for Item 107904 on 2020-09-28T09:15:22Z
Selected Contributions of Sister Mary Berenice Beck, O.S.F. to Nursing in the United States, 1923-1956
No full textby Sister M. Timothy Costello.Typescript.Thesis (M.S.N.)--Catholic University of America.Bibliography: leaves 44-47.Also available in microfilm
ASO Author Reflections: Re-resection of Positive Bile Duct Margin for Hilar Cholangiocarcinoma
No full textAuthor Reflections: Re-resection of Positive Bile Duct Margin for Hilar Cholangiocarcinom
Swartz and Miller_2019_Managing farm ponds as breeding sites for amphibians_Ecological Applications
No full textMetadata for raw data used for analyses in: T. M. Swartz and J. R. Miller. 2019. Managing farm ponds as breeding sites for amphibians: key trade-offs in agricultural function and habitat conservation. Ecological Applications.Files:1.DataS1_unmarkedAnalyses.csv2.DataS2_Chronosequence_Analysis.csvDescriptions:File 1: DataS1_unmarkedAnalyses.csv •contains all data used to perform the single season ocucpancy analyses described in the manuscript: Swartz and Miller (2019) Managing farm ponds •PondID: represents the coded name given to each pond (site)•Amphibian species: names are abbreviated as follows: HYLA: Hyla chrysoscelis/versicolor (Cope's/Eastern gray treefrog) ACBL: Acris blanchardi (Blanchard's cricket frog) LIBL: Lithobates blairi (Plains leopard frog) LICA: Lithobates catesbeianus (American bullfrog) oIn all cases, the year being analyzed is denoted as either "16" or "17", and the number of sites included is denoted with "51" oFor each species, there are 8 columns containing a "1", "0", or "NA", to signify whether the species was present, absent, or no surveys were performed during the 8 sampling occasions (four in each year). oThe sampling occasions are denoted as the 3rd number in the column headings for the amphibian species.•Habitat variables, the following abbreviations are used in the column headings: oFL= Floating vegetation percent cover o EM= Emergent vegetation percent cover oAQ= submerged/aquatic vegetation percent cover oLogArea= log-transformed area of each pond (in meteres^2) ocattle= presence or absence of cattle around the pond oFish= presence or absence of fish in the pond•Detection Covariates: oColumns containing "J", "Temp", or "T", represent Julian date, Mean daily temperature, or sampling occasion number, respectively, followed by the year ("16" or "17", where applicable) and the sampling occasion number.File 2: DataS2_Chronosequence_Analysis.csv•contains all data used to perform the chronosequence analyses described in the manuscript. oPondID: represents the coded name given to each pond (site)•Habitat variables, the following abbreviations are used in the column headings: FL= Floating vegetation percent cover EM= Emergent vegetation percent cover AQ= submerged/aquatic vegetation percent cover LogArea= log-transformed area of each pond (in meteres^2) cattle= presence or absence of cattle around the pond oFor each variable, the year of the measurement was taken is noted as either a "1617" to indicate that measurements from 2016 and 2017 were averaged for this comparison. pH, was only measured in 2017 so no year is listed.</div
t-pollington/developments_tau_statistic: First release
No full textCode release archived on Zenodo from the following paper:
@ARTICLE{Pollington2021, author={Pollington, T.M. and Tildesley, M.J. and Hollingsworth, T.D. and Chapman, L.A.C.},
volume = {42},
pages = {100438},
year = {2021},
note = {Towards Spatial Data Science},
issn = {2211-6753},
title={{Developments in statistical inference when assessing spatiotemporal disease clustering with the tau statistic}},
journal={Spatial Statistics},
doi={10.1016/j.spasta.2020.100438},
url = {https://www.sciencedirect.com/science/article/pii/S2211675320300324},
keywords = {Second order dependence, Pointwise confidence interval, Bias corrected accelerated BCa, Percentile confidence interval, Spatial bootstrap, Graphical hypothesis test} }Please contact Timothy M Pollington as corresponding author on [email protected] for any assistance.
TMP, LACC & TDH gratefully acknowledge funding of the NTD Modelling Consortium by the Bill &
Melinda Gates Foundation (BMGF) (grant number OPP1184344) and LACC acknowledges funding of
the SPEAK India consortium by BMGF (grant number OPP1183986). Views, opinions, assumptions
or any other information set out in this article should not be attributed to BMGF or any person
connected with them. TMP's PhD is supported by the Engineering & Physical Sciences Research
Council, Medical Research Council and University of Warwick (grant number EP/L015374/1). TMP
thanks Big Data Institute for hosting him during this work
Ardisia Swartz 1788
No full textKey to Ardisia subgenus Crispardisia in Peninsular Malaysia 1. Inflorescences strictly terminal on lateral leafy branches..................................................................................................................2 - Inflorescences lateral (axillary) and/or terminal on main stem or lateral branches...........................................................................5 2. Lamina coriaceous, rarely subcoriaceous, relatively small 2.5–6.5(–9) cm long, rarely up to c. 13 cm long................................................................................................................................. Ardisia rosea King & Gamble (1906: 150) - Lamina chartaceous, rarely subcoriaceous, larger (7–)9–16(–18) cm long.......................................................................................3 3. Inflorescences much branched, peduncle longer (1.5–) 5 cm long................................ Ardisia polysticta Miq. (Miquel 1861: 576) - Inflorescences usually unbranched, and if only 1–2 with peduncle(s) then these less than 1.5 cm long...........................................4 4. Leaf apex obtuse, sometimes acute, secondary veins closely spaced....................................................................... Ardisia crenata - Leaf apex long acuminate to acuminate-caudate, secondary veins laxly spaced......... Ardisia ridleyi King & Gamble (1906: 148) 5. Inflorescence strictly lateral (axillary) on main stem.........................................................................................................................6 - Inflorescence lateral (axillary) and/or terminal on main stem or lateral branches.............................................................................7 6. Lamina oblong-lanceolate, subcoriaceous, apex usually shortly acuminate rarely long and slightly caudate, 0.5–1(–2) cm long; pedicels longer and slender................................................................................... Ardisia sphenobasis Scheff. (Scheffer 1867: 65) - Lamina elliptic, coriaceous, apex long acuminate-caudate, 2–2.5 cm long; pedicels shorter and thicker................... Ardisia minor 7. Inflorescence lateral (axillary) and terminal on lateral branches..................................................................... Ardisia lankawiensis - Inflorescence lateral (axillary) on main stem and/or terminal on lateral branches............................................................................8 8. Lamina oblanceolate-elliptic, apex acuminate, densely, villous-pilose hairs on both surfaces; inflorescences terminal on lateral branches; hairs white................................................................................................................................................... Ardisia villosa - Lamina narrowly elliptic to oblong-elliptic, apex acuminate-caudate, lamina soon glabrescent except the midrib; inflorescences lateral (axillary) on main stem and terminal on short lateral branch; hairs rust coloured............................... Ardisia recurvisepalaPublished as part of Julius, Avelinah & Utteridge, Timothy M. A., 2021, Ardisia recurvisepala (Primulaceae-Myrsinoideae), a new species from Peninsular Malaysia, pp. 79-84 in Phytotaxa 480 (1) on page 83, DOI: 10.11646/phytotaxa.480.1.7, http://zenodo.org/record/541483
A web-based screening tool for near-port air quality assessments
No full textAuthor(s): Isakov, Vlad; Barzyk, Timothy M; Smith, Elizabeth R; Arunachalam, Saravanan; Naess, Brian; Venkatram, Akul
Increasing Distributed Generation Penetration using Soft Normally-Open Points
No full textThis paper considers the effects of various voltage control solutions on facilitating an increase in allowable levels of distributed generation installation before voltage violations occur. In particular, the voltage control solution that is focused on is the implementation of `soft' normally-open points (SNOPs), a term which refers to power electronic devices installed in place of a normally-open point in a medium-voltage distribution network which allows for control of real and reactive power flows between each end point of its installation sites. While other benefits of SNOP installation are discussed, the intent of this paper is to determine whether SNOPs are a viable alternative to other voltage control strategies for this particular application. As such, the SNOPs ability to affect the voltage profile along feeders within a distribution system is focused on with other voltage control options used for comparative purposes. Results from studies on multiple network models with varying topologies are presented and a case study which considers economic benefits of increasing feasible DG penetration is also given
Evidence from North Carolina Shows that Immigrant Students with Limited English Have a Very Minor Impact on Native Students' Performance
No full textMuch of the recent concern about undocumented immigration into the U.S. can be linked to the perceived burden that these immigrants may create on the public education system. But is this really the case? Through analyzing detailed information on the performance of students in North Carolina,Timothy M. Diette and Ruth Uwaifo Oyelere find that the presence of students with limited English does have a negative, though small, effect on the math and reading achievement of natives that are male and black. They argue, however, that these effects are so small as not to warrant policy interventions. KEYWORDS: Education, English Language, Immigrants, Impact, Bilingual, Multilingual, and Multicultural Education, Educatio
Evaluating Research Impact through Open Access to Scholarly Communication
No full textScientific research is a competitive business – in order to secure funding, promotion and tenure researchers must demonstrate their work has impact in their field. To maximise impact researchers undertake high priority research, aim to get results first, and publish in the highest impact journals. The Internet now presents a new opportunity to the scholarly author seeking higher impact: s/he can now make their work instantly accessible on the Web through author self-archiving. This growing body of open access literature (coupled with new publishing models that make journals available for-free to the reader) maximises research impact by maximising the number of people who can read it, and making it available sooner. Open access also provides a new opportunity for bibliometric research. This thesis describes the relatively recent phenomenon of open access to research literature, tools that were built to collect and analyse that literature, and the results of analyses of the effect of open access and its effect on author behaviour. It shows that articles self-archived by authors receive between 50-250% more citations, that rapid pre-printing on the Web has dramatically reduced the peak citation rate from over a year to virtually instant and how citation-impact – now widely used for evaluation – can be expanded to include a new web metric of download impact
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