2,147 research outputs found
Procedure to determine direct diversions from Lake Michigan
Illinois diverts water from Lake Michigan to the Chicago River and Canal System in three primary ways: (1) diversions for municipal water supply, (2) storm water diverted away from the lake, and (3) direct diversions primarily for water quality purposes. The U.S. Supreme Court has ruled that the total average diversion must not exceed 3200 cfs. Since the stormwater diversion is uncontrollable, by reducing the amount necessary for direct diversion, the diversion available for municipal use can be increased. An optimization procedure, utilizing an efficient network algorithm, is developed to determine the average monthly flowrates at the three diversion points on Lake Michigan. The algorithm minimizes the total amount diverted that is necessary to maintain the dissolved oxygen standard in the waterway system. The procedure is applied to evaluate direct diversion needs under existing conditions and after installation of ten instream aeration stations. Results show the need for large diversions during the summer months and primarily at one diversion point. The installation of instream aerators reduces the need for direct diversions by approximately 25 percent.U.S. Geological SurveyU.S. Department of the InteriorOpe
Optička svojstva soli polianilina i baze polianilina punjenog s KBr, Co(CH3COO)2 i pikričnom kiselinom
Polyaniline was prepared by chemical methods. The composites were prepared by the hot pressing of polyaniline base with different percentages of KBr, Co(CH3COO)2 and picric acid. The diffused reflectance of polyaniline doped with 10, 15, 25 and 50 wt% of KBr, picric acid and cobalt acetate, was measured at room temperature in the wavelength range from 500 to 1800 nm. The energy gaps of the samples were then deduced as well as the position and number of the indirect transitions which were found to be dependent on the concentration percentage of the doping materials. The energy gaps of all samples decrease by increasing the concentration percentage of the doping materials.Polianilin smo pripremili kemijskim postupkom. Mješavine smo postigli vrućim tiskanjem polianilina s raznim postocima KBr, Co(CH3COO)2 i pikrične kiseline. Mjerili smo difuznu reflektanciju polianilina s 10, 15, 25 and 50 tež% KBr, pikrične kiseline i kobaltnog acetata na sobnoj temperaturi za valne duljine 500 do 1800 nm. Odredili smo energijske procjepe te položaje i broj posrednih prijelaza. Ustanovili smo za sve uzorke pad energijskih procjepa pri povećanju koncentracije dodataka
Changes in Driving Behavior Across Age Cohorts in an Arab Culture: The Case of State of Qatar
In this investigation, we aimed to examine the structure of the Driving Behavior Questionnaire (DBQ) across age cohorts spanning 14 to 55 years in the State of Qatar. In addition, we aimed to examine variations in driving behavior across age cohorts. Participants were divided by age (in years) into five groups: not yet old enough to drive (under age), 18 to 25; 26 to 35; 36 to 45, and 46 to 55. The DBQ was administered to a sample of 1126 drivers, 50.30% of whom were female. Results are contrary to previous studies: factor analysis showed three pure factors rather than the four factors previously identified. Results also indicate that Qatari drivers share in their approach to driving even though there is great cultural diversity as well as varied language skills and educational levels. Significantly fewer driving aberrations were reported by female participants compared to those who were male. Furthermore, young men (<25 years old) with low levels of education and those who use 4-wheel-drive vehicles had the worst driving errors, violations, and lapses. 2018 The Authors. Published by Elsevier B.V.Qatar National Research Fund, Qatar FoundationScopu
Studies on Pseudomonas aeruginosa Infection in Hatcheries and Chicken
ΔΕΝ ΔΙΑΤΙΘΕΤΑΙ ΠΕΡΙΛΗΨΗThe aim of this work was to spot light on the presence of Pseudomonas aeruginosa (P. aeruginosa) strains in hatcheries and dead in shell embryos. A total of 406 samples representing 200 and 206 swabs from hatcheries environment and yolk sacs of dead in shell embryos were collected from Damietta governorate, Egypt. P. aeruginosa was isolated and identified. Some virulent genes (toxA, psIA and fliC) of P. aeruginosa were detected using polymerase chain reaction (PCR). The antimicrobial susceptibility of P. aeruginosa was tested in vitro. Day and 11 days old broiler chicks were challenged with P. aeruginosa to determine the pathogenicity of the isolated strains. The results showed that P. aeruginosa was recovered from 16 (8%) out of 200 hatcheries and from 17 (8.25%) out of 206 chicken embryos samples. Isolated strains of P. aeruginosa showed presence of toxA, psIA and fliC virulent genes. P. aeruginosa strains were sensitive (100%) to ciprofloxacin, levofloxacin and gentamycin but resistant (100%) to amoxycillin/clavulanic acid, doxycycline and erythromycin. The pathogenicity test of day and 11 days old chicks revealed that P. aeruginosa was highly pathogenic induced mortality rates of 72 and 40%, respectively. Septicaemia of internal organs, unabsorbed yolk sacs, pneumonia, greenish exudates in the abdominal cavity, liver necrosis and enteritis were the predominant lesions. Histopathological changes supported the previous lesions. In conclusion, P. aeruginosa is of great importance pathogen of embryos and newly hatched chicks based on presence of virulent genes as well as in vivo pathogenicity study; respectively
Ectopy on a single 12‐lead ECG, incident cardiac myopathy, and death in the community
BackgroundAtrial fibrillation and heart failure are 2 of the most common diseases, yet ready means to identify individuals at risk are lacking. The 12-lead ECG is one of the most accessible tests in medicine. Our objective was to determine whether a premature atrial contraction observed on a standard 12-lead ECG would predict atrial fibrillation and mortality and whether a premature ventricular contraction would predict heart failure and mortality.Methods and resultsWe utilized the CHS (Cardiovascular Health) Study, which followed 5577 participants for a median of 12 years, as the primary cohort. The ARIC (Atherosclerosis Risk in Communities Study), the replication cohort, captured data from 15 792 participants over a median of 22 years. In the CHS, multivariable analyses revealed that a baseline 12-lead ECG premature atrial contraction predicted a 60% increased risk of atrial fibrillation (hazard ratio, 1.6; 95% CI, 1.3-2.0; P<0.001) and a premature ventricular contraction predicted a 30% increased risk of heart failure (hazard ratio, 1.3; 95% CI, 1.0-1.6; P=0.021). In the negative control analyses, neither predicted incident myocardial infarction. A premature atrial contraction was associated with a 30% increased risk of death (hazard ratio, 1.3; 95% CI, 1.1-1.5; P=0.008) and a premature ventricular contraction was associated with a 20% increased risk of death (hazard ratio, 1.2; 95% CI, 1.0-1.3; P=0.044). Similarly statistically significant results for each analysis were also observed in ARIC.ConclusionsBased on a single standard ECG, a premature atrial contraction predicted incident atrial fibrillation and death and a premature ventricular contraction predicted incident heart failure and death, suggesting that this commonly used test may predict future disease
Bayesian estimation of P[Y \u3c X] Based on Record Values from the Lomax Distribution and MCMC Technique
Our interest is in estimating the stress-strength reliability R = P[Y \u3c X], where X and Y follow the Lomax distribution with common scale parameter. We discuss the problem in the situation where the stress measurements and the strength measurements are both in terms of records. Firstly, we obtain the MLE of R in general case (the common scale parameter is unknown). The MLE of the three unknown parameters can be obtained by solving one non-linear equation. We provide a simple fixed point type algorithm to find the MLE. We propose percentile bootstrap confidence intervals of R. A Bayes point estimator of R, and the corresponding credible interval using the MCMC sampling technique have been proposed. Secondly, assuming the common scale parameter is known, the MLE of R is obtained. Using exact distributions of the MLEs of the two unknown parameters, we construct the exact confidence interval of R. In this case, Bayes estimators have been obtained using Lindley\u27s approximations. Analysis of a simulated data set has been presented for illustrative purposes. Finally, the different proposed methods have been compared via Monte Carlo simulation study
Interspecies data mining to predict novel ING-protein interactions in human
YesFunding provided by the Open Access Authors Fund
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