11,295 research outputs found
Mordecai Walker and Andrew Walker Oral History Interview
No full textMordecai Walker was born in Citrus Park, FL and moved to St. Petersburg in 1958. Andrew Walker was born in St. Petersburg and lived in several different places before returning in approximately 2010. They lived in the Gas Plant area at 1224 5th Avenue South until the interstate went in, the property was bought out, and they relocated to the Driftwood area of St. Pete. The interview covered detailed information about the area; nearby families, churches, and businesses, including funeral homes; and the cemeteries and their relocation. They were members of St. Augustine’s Episcopal Church, on the southern end of the cemetery complex, and First Baptist Church, also in the Gas Plant area. Both churches relocated prior to or because of the interstate going in. Neither has, to their knowledge, ancestors buried in the cemetery complex, but M. Walker, a retired school teacher and realtor, remembers remains being relocated. Interview 1 had some technical problems, so a second interview was scheduled to clarify information. In Interview 2, A. Walker discusses his experiences working with McRae Funeral Home as a teenager and M. Walker specifically describes what he saw regarding remains being exhumed
Father Andrew Mullen 1790-1818: a study in early nineteenth century spirituality
No full textThis thesis is laid out in three parts: Part I. The life and death of Andrew Mullen. The life is based, to a large extent, on a long letter to his mother, Catherine Mullen, dated 7 January 1810. The letter gives a definite insight into his spirituality based on his membership of the Archconfraternity of the Blessed Sacrament. There is a hint that he had a premonition of an early death. Part II. The burial of Andrew Mullen and the immediate cult to him This is based on documentary evidence. Part III. Most of this part is a catalogue of testimonies taken from 1993 onwards. Then there is the conclusion on the popular devotion to Andrew Mullen stressing the theological aspect of the subject. In the course of writing the thesis it was decided to separate the documentary evidence from the oral tradition. This was advantageous in developing the thesis, and the documents provided a secure basis for the oral tradition. Two pieces of information were found in March 1997. They are death notices: 2 January 1819, The Leinster Journal and 7 January 1819, The Car low Morning Post. There is a slight discrepancy between the two on the date of his death. Also this discrepancy shows a slight difference from the date of the tombstone
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Cloning and characterization of XiR1, a locus responsible for dagger nematode resistance in grape
No full textHwang, Chin-Feng, Kenong Xu, Rong Hu, Rita Zhou, Summaira Riaz, and M. Andrew Walker. Cloning and characterization of XiR1, a locus responsible for dagger nematode resistance in grape. Theoretical and applied genetics 121, no. 4 (2010): 789-799
Walker, Andrew J. (Death, 1890-02-07)
No full textAddress: Auterbaum St.Age at death: 63119/Pg 19/1890/M W M/Pa./Dr. T.F. Dickinson/W.A. Watkins/Mt. WashingtonOriginal record filed in drawer labeled 'WALKER-_WALTEN'
Methods for Bayesian inversion of seismic data
No full textThe purpose of Bayesian seismic inversion is to combine information derived from
seismic data and prior geological knowledge to determine a posterior probability
distribution over parameters describing the elastic and geological properties of the
subsurface. Typically the subsurface is modelled by a cellular grid model containing
thousands or millions of cells within which these parameters are to be determined.
Thus such inversions are computationally expensive due to the size of the parameter
space (being proportional to the number of grid cells) over which the posterior is to
be determined. Therefore, in practice approximations to Bayesian seismic inversion
must be considered. A particular, existing approximate workflow is described in
this thesis: the so-called two-stage inversion method explicitly splits the inversion
problem into elastic and geological inversion stages. These two stages sequentially
estimate the elastic parameters given the seismic data, and then the geological parameters given the elastic parameter estimates, respectively. In this thesis a number
of methodologies are developed which enhance the accuracy of this approximate
workflow.
To reduce computational cost, existing elastic inversion methods often incorporate only simplified prior information about the elastic parameters. Thus a method
is introduced which transforms such results, obtained using prior information specified using only two-point geostatistics, into new estimates containing sophisticated
multi-point geostatistical prior information. The method uses a so-called deep neural network, trained using only synthetic instances (or `examples') of these two estimates, to apply this transformation. The method is shown to improve the resolution
and accuracy (by comparison to well measurements) of elastic parameter estimates
determined for a real hydrocarbon reservoir.
It has been shown previously that so-called mixture density network (MDN) inversion can be used to solve geological inversion analytically (and thus very rapidly and efficiently) but only under certain assumptions about the geological prior distribution. A so-called prior replacement operation is developed here, which can be
used to relax these requirements. It permits the efficient MDN method to be incorporated into general stochastic geological inversion methods which are free from the
restrictive assumptions. Such methods rely on the use of Markov-chain Monte-Carlo
(MCMC) sampling, which estimate the posterior (over the geological parameters) by
producing a correlated chain of samples from it. It is shown that this approach can
yield biased estimates of the posterior. Thus an alternative method which obtains
a set of non-correlated samples from the posterior is developed, avoiding the possibility of bias in the estimate. The new method was tested on a synthetic geological
inversion problem; its results compared favourably to those of Gibbs sampling (a
MCMC method) on the same problem, which exhibited very significant bias.
The geological prior information used in seismic inversion can be derived from real
images which bear similarity to the geology anticipated within the target region of the
subsurface. Such so-called training images are not always available from which this
information (in the form of geostatistics) may be extracted. In this case appropriate
training images may be generated by geological experts. However, this process can
be costly and difficult. Thus an elicitation method (based on a genetic algorithm)
is developed here which obtains the appropriate geostatistics reliably and directly
from a geological expert, without the need for training images. 12 experts were asked
to use the algorithm (individually) to determine the appropriate geostatistics for a
physical (target) geological image. The majority of the experts were able to obtain
a set of geostatistics which were consistent with the true (measured) statistics of the
target image
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Breeding Salt Tolerant Grapevine Rootstocks
No full textThe accumulation of salts in plant rootzones, known as “salinization,” is often a gradual process that can degrade soil structure and cause permanent plant damage. Salinization caused by ever increasing water demands and an increasingly dry climate is becoming problematic for agriculture in semi-arid to arid regions, including California’s Central Valley, which produces about one-quarter of the United States' food supply and almost half of its nuts and fruits, including grapes, according to the USGS California website (https://ca.water.usgs.gov). While grapevines are considered moderately salt tolerant (Walker et al. 2002), the current rate of salinization in many of California's vineyards is contributing to reduced crop yields and lower fruit quality (Keller 2020). Once symptoms of salt toxicity appear on the leaves, vine growth and crop yield may already be in serious decline (Fort and Walker 2011). To prevent salt toxicity from occurring in grapevines, the Walker Lab at UC Davis is applying traditional plant breeding techniques to some of the native population of wild North American grapevine species to improve the salt tolerance of commercial rootstocks (Fort et al. 2013). In recent years, the Walker Lab discovered a wild grapevine species called Vitis acerifolia 9018, which has consistently proven to be more salt tolerant than the most salt tolerant commercial rootstocks (Chen 2021). These physiological traits could be bred into existing popular commercial rootstocks to improve their salt tolerance. The research for this thesis was performed to observe the stress response and compare the salt tolerance of the recently discovered salt tolerant wild rootstock V. acerifolia 9018, against commercial rootstocks widely planted in California and other salinization-affected places, including Ramsey, 1103 Paulson and 140 Ruggeri
Colors 2007
No full textCONTENTS
Foraging, Sam Ellis 2;
Transmutation, Aaron Delman 3;
Frosted Pines, Christy Marchetti 4;
Deer Encounter, Phil Quinn 5;
Pond, Carolyn Smillie 6;
Dark Dreamscapes, Carolyn Smillie 7;
Lullaby and Goodnight, Bill Lovelady 9;
Faded Leaves, Janna Tomsheck 10;
Sonnet Written After Watching a Man Die, Drew Riley 11;
Swinging, Sara Walker 12;
Black Thunder, Katy Heitstuman 14;
Love, Your Ex, Sara Walker 16;
Infidelity, Loren Graham 17;
Homeopathy, Loren Graham 18;
A Definition, Christy Marchetti 19;
Spotlight, Andrew Stark 20;
Dire Sport, Ryan Pfeiffer 25;
girl, Andrew Stark 26;
Kisses Past, David M. Gerke 27;
The F Word, David M. Gerke 29;
For an anniversary, Bill Lovelady 30;
Macrame, Christy Goll 32;
Right-Hand Girl, Janna Tomsheck 33;
Perfection Resolved, James Buscher 43;
Hard Life, BQ 44;
Driven, Randy Hussey 46;
An Unlikely Hero, Nathan Brehe 47;
Revelation Arizona, Kevin Jam 54;
An Evangelical Wraith, Nathan Brehe 55;
Another optimist, Bill Lovelady 56;
Darkening Sky, Janna Tomsheck 57;
Two Poems Detailing my Idolatry, Drew Riley 58
Soil Seedbank of Rare Plant Communities Associated with Diabase Soils in Durham and Granville Counties, North Carolina
No full textABSTRACT
WALKER, ANDREW SCOTT. Soil Seedbank of Rare Plant Communities Associated with Diabase Soils in Durham and Granville Counties, North Carolina (Under the direction of Dr. Jon M. Stucky).
In Northeastern Durham County and Southwestern Granville County, North Carolina, there are a cluster of unique, species-rich plant communities associated with diabase soils. These communities are characterized by an abundance of shade-intolerant forbs with prairie affinities, including the federally endangered smooth coneflower, Echinacea laevigata. Monitoring reports of E. laevigata indicate that, while most populations declined between 1988 and 2002, the population at Picture Creek Diabase Barren increased dramatically, presumably in response to a prescribed fire and canopy clearing associated with a power line right of way. This suggested the possibility that E. laevigata and other rare plants form a persistent soil seed bank which can contribute to population increases. Presence of a soil seed bank could have conservation value and facilitate restoration of other “prairie remnants†in the area. We tested the soil seed bank at Picture Creek and two other nearby locations which have similar floras and were reported to have had similar numbers of E. laevigata in 1988. We also tested the litter layer at Picture Creek. No rare plants were found in the soil seed bank, but a few were recovered from the leaf litter
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