2,408 research outputs found
Bruce Gates: A Career in Catalysis
No full textOn the occasion of his 80th birthday, we take stock of the remarkable and ongoing career of Professor Bruce C. Gates. This Account highlights his key scientific achievements in three areas of significance: supported metal clusters and atomically dispersed metal complexes, hydroprocessing reaction networks and catalysts, and strong acid catalysis. His contributions in all three areas are noteworthy and have been sustained over 50 years. The work of his group evolved from mainly catalyst synthesis and reaction studies to also incorporate sophisticated characterization techniques based on X-ray absorption spectroscopies and improved scanning transmission electron microscopic examination of catalytic surfaces. In the course of this work, he has addressed, and contributed to the solutions of some of the most significant and challenging problems in catalysis of the last half century
History sketch 157th Engineer (C) Bn.
No full textThis is a historical description of the 157th Engineer (C) Battalion written from memory by author. Notes are not attached as described on last page of document
Robert L. Malan v. Kevin Gates : Brief of Appellant
No full textAPPEAL FROM FINAL JUDGMENT AND ORDER GRANTING
CIVIL STALKING INJUNCTION AGAINST KEVIN GATES, THE
HONORABLE BRUCE C. LUBECK PRESIDING IN THE THIRD
JUDICIAL DISTRICT COURT, SUMMIT COUNTY, STATE OF UTA
Learning Phonological Grammars for Output-Driven Maps
No full textThe challenge of simultaneously learning a lexicon of underlying forms and a constraint ranking has been addressed by several scholars in recent work (Apoussidou 2007, Jarosz 2006, Merchant 2008, Tesar 2006). In particular, the proposal of Merchant, the Contrast Pair and Ranking information algorithm (CPR), avoids having to explicitly enumerate all possible underlying forms for each morpheme (in contrast to Apoussidou and Jarosz), and also avoids having to explicitly enumerate all possible constraint rankings (in contrast to Jarosz).
While CPR avoids those computational traps, there are still some components of CPR (and of the related work by Tesar) that pose computational difficulties. (1) The focus of CPR on lexical hypotheses for only a pair of related words at a time (a contrast pair) is a vast improvement over simultaneous consideration of all possible lexica, but the space of lexical hypotheses for a single contrast pair still grows exponentially in the number of unset underlying features for the morphemes involved in the pair. (2) The technique of initial lexicon construction, setting in advance features that do not alternate, can restrict further the number of lexical hypotheses that need to be considered, but at the cost of requiring that the learner have a complete paradigm of surface form data before learning of underlying forms can begin. (3) The extraction of ranking information performed by CPR is able to obtain ranking information from contrast pairs for which complete underlying forms have not yet been determined, but also faces exponential computational complexity, due in part to the fact that the procedure is separately computing the ranking implications of each lexical hypothesis in the (exponentially growing) set of possible hypotheses for the contrast pair.
The current paper demonstrates that each of these computational concerns can be significantly improved upon by taking the structure of grammars into greater consideration. The key grammatical structure lies in Tesar's proposal of output-driven map (Tesar 2008). Intuitively, an output-driven map is a phonological map in which all disparities introduced between the input and the output are motivated by conditions on the output. This notion is formalized by the requirement that any grammatical input-output mapping A->C entails the grammaticality of B->C whenever B has 'greater similarity' to C than A does (A->C has every input-output disparity that B->C does, but B->C may lack some disparities of A->C). An output-driven map is necessarily a restricted identity map (Prince and Tesar 2004), meaning that every grammatical form maps to itself, a property assumed to hold of grammars in much learnability work, including that of Merchant. Output-driven maps can be viewed as a strengthened version of restricted identity maps.
The structure of output-driven maps can be exploited in learning via the contrapositive: B~->C entails A~->C. Given a grammatical output C, it is a given that C->C (restricted identity map property). Suppose B has one disparity with C (e.g., they differ in the value of one feature on one segment). If the learner possesses sufficient information to determine that B cannot map to C, then the learner need not bother checking to see if A maps to C; because the map is output-driven, any input which has, relative to C, all of the disparities of B plus additional ones cannot be grammatical. All lexical hypotheses which include all of the disparities of B->C may be dismissed without evaluation. Instead of needing to evaluate all combinations of possible values for all unset features of a word (exponential in the number of unset features), the learner can obtain the same information while only evaluating a single unset feature at a time (linear in the number of unset features), having the other unset features match (temporarily) the values of their output correspondents, addressing concern (1). If a word has eight unset binary features, this means evaluating 8 lexical hypotheses instead of 256. Even greater benefit is realized when obtaining ranking information from forms with unset features, addressing concern (3).
The speed-up realized by exploiting the structure of output-driven maps is significant enough that initial lexicon construction is no longer needed. This frees the learner from needing an entire paradigm before learning commences; the learner can begin learning about underlying forms from even a single datum, addressing concern (2). This algorithm has the notable property that features of underlying forms which cannot be shown to require a particular value remain unset; non-contrastive features are never set, without any need for the learner to separately construct an 'inventory of contrastive features'.The definitive version of this paper is published in NELS 39: Proceedings of the 39th Annual Meeting of the North East Linguistic Society (2011
Supporting Information for Mechanism of Methanol Dehydration Catalyzed by Al8O12 Nodes assisted by Linker Amine Groups of the Metal-Organic Framework CAU-1
No full textThe DFT-optimized structures are reported in the XYZ format. The structures optimized using two different functionals, PBE-D3 and M06-L, are presented.This repository contains the XYZ files of the structures optimized using density functional theory for the investigation of methanol dehydration mechanism catalyzed by metal-organic framework CAU-1.This work was supported as part of the Inorganometallic Catalyst Design Center, an Energy Frontier Research Center funded by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES), under Award DE-SC0012702Yang, Dong; Chheda, Saumil; Lyu, Yinghui; Li, Ziang; Xiao, Yu; Siepmann, J Ilja; Gagliardi, Laura; Gates, Bruce C. (2022). Supporting Information for Mechanism of Methanol Dehydration Catalyzed by Al8O12 Nodes assisted by Linker Amine Groups of the Metal-Organic Framework CAU-1. Retrieved from the Data Repository for the University of Minnesota (DRUM), https://doi.org/10.13020/b2hz-1r27
Amynthas loveridgei Gates 1968
No full text6. Amynthas loveridgei (Gates, 1968) (Figure 12) Pheretima loveridgei Gates, 1968: 257; 1982: 57. Amynthas loveridgei — Sims & Easton 1972: 236. Reynolds 1978: 127; 2011: 274. Reynolds & Wetzel 2004: 88; 2008: 180. Blakemore 2014: 129, 130. Data sources. Gates (1968, 1982); Blakemore (2014); this study (USNM 136910 (syntypes), 125052, 125056). Diagnosis. Size 90–113 mm by 4–6 mm. Segment numbers 118–169. Color of live specimens unknown. Male pores paired in XVIII, sitting near the lower edge on a pre-setal genital marking. Post-clitellar genital markings 3– 6 papillae or tubercles on each side on XVIII; typically three, arranged in a triangle (one lateral, one pre-setal, and one post-setal), often the anterior-most marking extends posteriorly to contain the primary male pore. All markings surrounded by deep, concentric furrows. Spermathecal pores two pairs in 5/6/7. Pre-clitellar genital markings present, one in front of and one behind each spermathecal pore, the latter more median to the pore. Female pore single in XIV. First dorsal pore 10/11 or 11/12. Spermathecae two pairs in VI–VII, variable in size, duct slender, as long as ampulla; diverticulum small or degenerated, usually shorter than the respective spermatheca, with a slender stalk and an ellipsoidal to pear-shaped seminal chamber. Prostate glands absent or well developed; when present, large, extending from XVI, XVII to XXIII, XXIV. Intestinal caeca paired in XXVII, simple, variable in size, extending anteriorly as far as XXIII. Remarks. One of the two pheretimoid species originally described from the US, A. loveridgei was first recorded in 1966 (Gates 1968) in Greenville, Madison County, Florida. In the US this species has been reported so far only in Georgia, Florida, and Minnesota. Reproduction of A. loveridgei is parthenogenetic. It can be easily confused with A. morrisi. Gates separated the two species mainly by their pre-clitellar genital markings and segment numbers. In fact, the specimens of A. loveridgei almost always look more slender than those of A. morrisi, and the two species can further be distinguished by the locations of male pores with respect to the adjacent genital markings. The syntypes in the Smithsonian Institution National Museum of Natural History (USNM 136910) and the British Museum of Natural History have the same collection data (27 May, 1966, Honey Lake, 5 miles west of Greenville, Madison County, Florida, USA). The syntypes at USNM have 22 adults and 40 subadults, including individuals with three or four genital markings in the male pore area. The specimens are in formalin and wellpreserved, but the morphology of the male pore area in the syntypes is not as clear as that in USNM 125052 (from Georgia, USA) and USNM 125056 (from Minnesota, USA). From the latter two samples, it is now clear that the primary male pore is on the lower edge of the pre-setal genital marking, on top of the presumed setal line. While the primary male pores are generally not visible in the USNM syntype specimens, in the syntype specimen dissected (Figure 10 C), the primary male pore can barely be seen on the left-hand-side male pore.Published as part of Chang, Chih-Han, Snyder, Bruce A. & Szlavecz, Katalin, 2016, Asian pheretimoid earthworms in North America north of Mexico: An illustrated key to the genera Amynthas, Metaphire, Pithemera, and Polypheretima (Clitellata: Megascolecidae), pp. 495-529 in Zootaxa 4179 (3) on pages 510-511, DOI: 10.11646/zootaxa.4179.3.7, http://zenodo.org/record/27252
Bruce Mayne Stars
No full textPhotograph used for a story in the Daily Oklahoman newspaper. Caption: "Gaslight Dinner Theatre's version of "The Impossible Years" arrives from Raleigh, N. C. Starring is Bruce Mayne, an actor with 125 productions to his credit. In this production coming to OKC, Mayne plays Dr. Kingsley, author of a best-selling book, and busy preparing another volume, based on a study of teenage sexual behavior.
Editorial for progressive education: Antecedents of educating for democracy
No full textJournal Articl
LIQUIDITY AND VALUATION IN EAST AFRICAN SECURITIES MARKETS
No full textThis study estimates liquidity premiums using the recently developed Liu measure within a multifactor capital asset pricing model including size premiums and a time-varying parameter model for the East African emerging markets of Uganda, Tanzania and Kenya together with London and South Africa. The evidence suggests that while size and liquidity effects are significant in the smaller emerging markets of Uganda and Kenya, they are less important in explaining returns in South Africa and London. Costs of equity are highest in Uganda followed by Kenya, with industrial and consumer non-cyclical sectors being lowest, and then South Africa and London. Copyright (c) 2009 The Author. Journal compilation (c) 2009 Economic Society of South Africa.
Minimum entropy restoration using FPGAs and high-level techniques
No full textOne of the greatest perceived barriers to the widespread use of FPGAs in image processing is the difficulty for application specialists of developing algorithms on reconfigurable hardware. Minimum entropy deconvolution (MED) techniques have been shown to be effective in the restoration of star-field images. This paper reports on an attempt to implement a MED algorithm using simulated annealing, first on a microprocessor, then on an FPGA. The FPGA implementation uses DIME-C, a C-to-gates compiler, coupled with a low-level core library to simplify the design task. Analysis of the C code and output from the DIME-C compiler guided the code optimisation. The paper reports on the design effort that this entailed and the resultant performance improvements
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