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15+ MILLION TOP 1% MOST CITED SCIENTIST 12.2% AUTHORS AND EDITORS FROM TOP 500 UNIVERSITIES 15 Diffusion of Radionuclides in Concrete and Soil
No full textCOMMUNITY ENGAGEMENT, HERITAGE, AND REDISCOVERING A SENSE OF PLACE IN NORTHBRIDGE, PERTH, AUSTRALIA
No full textFeature Selection and Classification in Noisy Epistatic Problems using a Hybrid Evolutionary Approach
No full textABSTRACT A hybrid evolutionary approach is proposed for the combined problem of feature selection (using a genetic algorithm with a fitness function based on a counter-propagation artificial neural network) and subsequent classifier construction (using genetic programming), for use in nonlinear association studies with relatively large potential feature sets and noisy class data. We had the dual goals of (a) accurately classifying new individuals based on feature values, and (b) estimating the nonlinear functional relationship of a subset of predictive features and class. The method was tested using synthetically generated mixed-type datasets with various degrees of injected noise, based on a proposed mental health database. Optimal (or nearly optimal) feature sets were accurately identified most of the time, even in the presence of significant amounts of noise in the class data. When presented the selected features, genetic programming consistently outperformed a counter-propagation neural network as a classifier, and reconstructed the correct underlying nonlinear expression associating features with class, even with noisy class data. The results show that the proposed hybrid algorithm has good potential for feature selection, classification, and estimation of the form of even relatively weak nonlinear relationships between features and class
DEVELOPMENT OF SOYBEAN VARIETIES WITH SPECIFIC NUTRITIONAL COMPOSITION OF GRAIN
No full textAbstract The major limitation to use row soybean grain in animal feed is presence of protease inhibitors -Kunitz trypsin inhibitor (KTI) and Bowman -Birk inhibitor (BBI), the main anti-nutritional factors of soybeans. They are responsible for the reduced digestibility of seed proteins and may cause disruption in animal's development. About 80% of tryptic activity inhibition is caused by KTI. Grain of conventional soybean varieties requires heat processing to break down trypsin inhibitor's activity before using as food or animal feed. The excessive heat treatments (uncontrolled temperature; long period of time) may decrease protein solubility and lower amino acid availability. The genetic control of presence of (Ti) has been reported as a co-dominant multiple allelic series at a single locus, while lack of KTI is inherited as a recessive allele designated ti. A section of soybean breeding program in Maize Research Institute Zemun Polje is aimed at reducing trypsin inhibitor activity, by crossing parent donor of desirable character (variety Kunitz-titi line) with adapted high yielding varieties (Ti line). Presence/absence of KTI in progeny was done by protein electrophoresis of mature seed from the individual plants in several segregating generations. After field trials over years and different locations, high-yielding soybean lines lacking KTI were identified. As a result of this breeding program, two varieties lacking KTI -Lana (maturity group II) and Laura (maturity group I), were released. Trypsin inhibitor content ranged from and 15.01 mg g -1 in Laura to 15.35 mg g -1 in Lana, which was about 50% less than in the genotypes of standard grain type. Grain yield of varieties is equal to high yielding varieties from the same maturity groups. Soybean lines with reduced protease inhibitor content could reduce or eliminate the need for expensive heat treatments and lessen the chance of lowering amino acid availability. This type of varieties might be suitable for small farms with direct feed production and animal growing
Elliptical Slice Sampling with Expectation Propagation
No full textAbstract Markov Chain Monte Carlo techniques remain the gold standard for approximate Bayesian inference, but their practical issues -including onerous runtime and sensitivity to tuning parameters -often lead researchers to use faster but typically less accurate deterministic approximations. Here we couple the fast but biased deterministic approximation offered by expectation propagation with elliptical slice sampling, a state-of-the-art MCMC method. We extend our hybrid deterministic-MCMC method to include recycled samples and analytical slices, and we rigorously prove the validity of each enhancement. Taken together, we show that these advances provide an order of magnitude gain in efficiency beyond existing state-of-the-art sampling techniques in Bayesian classification and multivariate gaussian quadrature problems
Carboniferous tholeiitic dikes in the Salada unit, Acatlán Complex 133 Carboniferous tholeiitic dikes in the Salada unit, Acatlán Complex, southern Mexico: a record of extension on the western margin of Pangea
No full textABSTRACT A suite of mafi c dikes intrudes polydeformed, greenschist facies, metapsammites and metapelites of the Salada unit in the easter
Brønsted Basicities of Diamines in the Gas Phase, Acetonitrile, and Tetrahydrofuran
No full textScheme 1. Diamines studied in this work. Scheme 2. Studied monoamines related to the diamines in this work
Case Report Two Cases of Enlarged Zuckerkandl's Tubercle of the Thyroid Displacing the Recurrent Laryngeal Nerve Laterally
No full textThe thyroid has many anatomic variations. Zuckerkandl's tubercle (ZT) is the posterior extension of lateral lobes. ZT has a relation with the recurrent laryngeal nerve (RLN). RLN lateral to ZT is an uncommon occurrence. This paper presents two cases of this uncommon situation. A 60-year-old female patient with large multinodular goiter was treated with total thyroidectomy. A 69-year-old male patient with follicular neoplasm was treated with total lobectomy. The inferior thyroid arteries and the recurrent laryngeal nerves were identified with usual lateral approach. A left ZT was found in case 1 and a right ZT in case 2. Distal parts of the RLNs were displaced laterally by enlarged ZTs in both cases. Grade 3 ZTs composed of thyroid tissue were placed between the trachea and the RLNs. The ZT is a common anatomic feature of the thyroid. Close relation of the tubercle with the RLN is an important surgical entity. The enlarged ZT seldom pushes the nerve laterally. The knowledge of the anatomy of ZT and its relation with the RLN including all variations is mandatory for safe thyroid operations
3745 Resonant Interactions between Solar Activity and Climate
No full textABSTRACT Solar magnetic activity exhibits chaotically modulated cycles with a mean period of 11 yr, which are responsible for slight variations in solar luminosity and modulation of the solar wind, while the earth's atmosphere and oceans support oscillations with many different frequencies. Although there are several mechanisms that might couple solar variability with climate, there is, as yet, no compelling evidence that a direct forcing is sufficiently effective to drive climatic change. In many nonlinear systems resonant coupling allows weak forcing to have a dramatic effect. An idealized model is considered, in which the solar dynamo and the climate are represented by low-order systems, each of which in isolation supports chaotic oscillations. The climate is represented by the Lorenz equations: solutions oscillate about either of two fixed points, representing warm and cold states, flipping sporadically between them. The effect of a weak nonlinear input from the dynamo to the climate that tends to push it toward the warm state is computed. This input has a significant effect when the ''typical frequencies'' of each system are in resonance. The solution is now asymmetric, with the warm state preferred. The degree of asymmetry is less than might be anticipated, because resonant forcing extends the duration of oscillations about either state, and so increases the timescale for flipping. The presence of grand minima in the solar output leads to complicated intermittent behavior in the climate. Consequently, the results of frequency analysis are sensitive to the duration of time series that is used. It is clear that the resonance provides a powerful mechanism for amplifying climate forcing by solar activity