Estimation of specific gravity with penetration and penetration index parameters by artificial neural network

Specific Gravity of the bitumen changes according to the ambient temperature. Different specific gravity values can be calculated at different temperature. Estimating models like Artificial Neural Network – ANN could be very useful to obtain the specific gravity value uniform. Specific gravity values obtained from Long-Term Pavement Performance – LTPP were estimated with artificial neural networks. Penetration and Penetration Index of binder were used for estimating the specific gravity of the bitumen. As a result, ANN get 84% of R2 between obtained and estimated values

Superhydrophobic asphalt pavements: surface improvement

The most adverse weather condition for road safety happens when there is water, snow, or ice on the road surface because their presence highly decreases friction. Therefore, it is essential to drain or repel them quickly. If the water drops are repelled from the surface or the ice/snow formation is avoided with the application of superhydrophobic coatings, roads become safer. In order to functionalize the asphalt mixtures used in road pavements, nano/micromaterials, such as Polytetrafluoroethylene (PTFE), TiO2, and SiO2, among others have been applied by spraying coating. The mixes are usually characterized by the water contact angle, and the surface roughness is typically assessed by optical and electron analysis. This research work aims to present a brief overview of superhydrophobic asphalt mixtures

Estimating inter-deployment training cycle performances

The objective of this thesis is to estimate Inter-Deployment Training Cycle (IDTC) performances of the US Pacific Fleet surface ships, which are evaluated at the end of the Basic Training Phase, by using Command Metrics Tool (COMET) metrics. The basic objective was primarily to decide whether the COMET database can be used to estimate performances of ships, and to build regression models to estimate Final Evaluation Problem (FEP) performances of ships. This study develops multivariate logit regression models to examine and explore the structure of the data sets. Most of the models developed according to statistical criteria include only the intercept, indicating that there is no real relationship between the COMET metrics and IDTC performances. The assessments made at the end of FEP are not good Measure of Performances (MOPs) by which to assess ships' IDTC performances.http://archive.org/details/estimatinginterd109456205Lieutenant Junior Grade, Turkish NavyApproved for public release; distribution is unlimited

hetaryltetrakisazocalix[4]arene derivatives

In this study, a convenient method for the synthesis of thirteen novel tetrakisazo dyes containing 25,27-bis-(4-nitrobenzyloxy)-26,28-dihydroxycalix[4]arene have been described. 5,11,17,23-Tetra-tert-butyl-25.26,27,28tetrahydroxycalix[4]arene, 25,26,27,28-tetrahydroxycalix[4]arene and 25,27-bis-(4-nitrobenzyloxy)-26,28-dihydroxycalix[4]arene were synthesized. 2-arylhydrazone-3-ketiminobutyronitriles 1(a m) were synthesized and reacted with hydrazine hydrate to afford the corresponding 5-amino-4-arylazo-3-methyl-1-Hpyrazoles 2(a m). Thirteen novel hetaryltetrakisazocalix[4]arene derivatives 6(a m) were achieved by diazotisation of 5-amino-4-arylazo-3-methyl-1-H-pyrazoles using nitrosylsulphuric acid, coupling with 25,27-bis-(4-nitrobenzyloxy)-26,28-dihydroxycalixI4]arene. The obtained hetaryltetrakisazocalix[41arene dyes 6(a-m) were characterized based on ET-IR, H-1 NMR and Mass spectroscopic techniques as well as Elemental Analysis. The solvatochromic behaviour of these dyes in various solvents was examined. Acid-base effect on the visible absorption maxima of the dyes were also reported. (C) 2012 Elsevier Ltd. All rights reserved

4-imino-3-arylazo-4H-pyrimido[2,1-b][1,3]benzothiazole-2-oles

4-Imino-3,4-dihydro-2H-pyrimido[2,1-b][1,3]benzothiazole-2-one (3) was synthesized by the reaction of 2-aminobenzothiazole with ethyl cyanoacetate in solvent free conditions at 150 A degrees C. A series of pyrimido benzothiazole-based azo dyes 4(a-m) were obtained by the coupling of carbocyclic amine-based diazonium chloride with compound (3). The synthesized dyes were purified and characterized by elemental analysis, FT-IR, H-1 NMR, and high-resolution mass spectral data. The solvatochromic behaviors of dyes in various solvents were examined. All the azo dyes exhibited pronounced in vitro antibacterial activities against Gram-positive and Gram-negative bacteria, as well as fungi. The results revealed that most of the compounds exhibited good levels of antibacterial activity. Compounds 4d and 4h showed excellent levels of antimicrobial activity with MIC values of 8.25 mu g/mL

from Pyrazolo[1,5-a]pyrimidine

5-Amino-3-methyl-4-phenylazo-1H-pyrazole and ethyl cyanoacetate reacted in solvent-free media at 150 degrees C to produce 7-amino-3-phenylazo-2-methyl-4H-pyrazolo[1,5-a]pyrimidine-5-one (3). A series of aromatic amines was coupled using this compound (3) and nitrous acid to produce new pyrazolo[1,5-a] pyrimidine derivatives with two arylazo groups 4(a-m). The structures of these dyes were determined via UV-vis, Fourier transform infrared, proton nuclear magnetic resonance, high-resolution mass spectral data, and elemental analysis. After synthesis, the solvent and acid-base effects of the dyes were investigated within the UV-vis region. The antimicrobial properties of the dyes were also studied. All dyes exhibited activity against Gram-positive and Gram-negative bacteria, and even against fungi. The results were compared to conventional reference results from the antibiotics ciprofloxacin and ketoconazole. Antioxidant potentials were analyzed using in vitro antioxidant models on the basis of DPPH (1,1-diphenyl-2-picrylhydrazyl) radical scavenging activities. Most of the compounds exhibited excellent antioxidant activities. In particular, compound 4b had a higher activity than Vitamin C

Properties

5,11,17,23-Tetra-tert-butyl-25,26,27,28-tetrahydroxycalix[4] arene and 25,26,27,28-tetrahydroxycalix[4] arene were synthesized based on previous literature. Firstly, several azo dyes were synthesized, and then, these dyestuffs were chlorinated through reaction with thionyl chloride. Secondly, the azo compounds bonded with methylene chloride and reacted with 25,26,27,28-tetrahydroxycalix[4] arene, and then, six novel disazocalix[4] arene derivatives 4(a-f) were achieved. Their structures were characterized as Fourier transform infrared, H-1-NMR, and elemental analysis. In this study, we investigated the solvatochromic properties of the compounds and the acid-base effect on their ultraviolet-visible absorption by using six solvents

Public Health Rep

This study evaluated the risk of travelers to the Russian Far East developing acute gastrointestinal or respiratory symptoms. Passengers and crew on 10 commercial airline flights from the Russian Far East to the United States were asked to complete a health questionnaire that asked age, sex, country of residence, length of stay, foods and beverages consumed, and about gastrointestinal or "flu" symptoms. Questionnaires were returned by 353 of 662 persons (53.3 percent). The most frequently reported symptoms were diarrhea (N = 18; 5.1 percent) and "flu" symptoms (N = 15; 4.2 percent). Among those people who reported symptoms, most were sick for 3 days or less, although 10 (27.0 percent) were still sick at the time that they entered the United States. Age and sex were not associated with symptoms. Persons who drank untreated tap water were more likely to have gastrointestinal symptoms (relative risk = 2.7; 95 percent confidence interval = 1.2, 5.9) while those who drank bottled or canned fruit juice were protected (relative risk = 0.4; 95 percent confidence interval = 0.2, 0.8). The incidence of "flu" symptoms was similar to the rate for the general population of the United States while the incidence of gastrointestinal symptoms was increased and only slightly less than the rate among travelers to developing countries. Travelers may wish to restrict consumption of untreated tap water and increase consumption of fruit juices. Additional work is needed to identify the pathogens responsible for acute illness among travelers to the Russian Far East.8210264PMCnul

Synthesis, Characterization, and Thermokinetic Analysis of New Epoxy Sugar Derivative

WOS: 000344266500001The synthesis of 5,6-O-isopropylidene-1,2-O-(R)-trichloroethylidene-alpha-D-glucofuranose (compound 1) and 5,6-O-isopropylidene-1,2-O-(R)-trichloroethylidene-3-O-(2',3'-epoxypropan-1'-yl)-alpha-D-glucofuranose (compound 2) was carried out. The synthesized compounds 1 and 2were characterized by nuclear magnetic resonance (H-1-NMR), Fourier transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TG). The FTIR and (HNMR)-H-1 spectra showed that the epoxy group in compound 2 was attached by means of a nucleophilic substitution reaction. The activation energies for thermal degradation of compounds 1 and 2 were calculated from their TG data by using the Kissinger-Akahira-Sunose (KAS) and Tang methods

Investigation of Using Waste Welded Tuff Material as Mineral Filler in Asphalt Concrete

In this paper, the welded tuff waste- known as koyke in Isparta region - was used in the hot mix asphalt (HMA) as mineral filler for reduction of the moisture susceptibility of HMA. Optimum binder content was assessed with Marshall Design Method. First of all, welded tuff was substituted as filler with limestone filler in proportion of 50% and 100%. After that Marshall Stability test was performed on specimens. The results showed that the 50% substitution was more effective than the 100% substitution. Therefore, welded tuff was substituted with limestone filler in proportion of 25%, 50%, 65% and 75%. Next, Indirect Tensile Strength test was practiced on the fabricated specimens and the results were assessed. According to the Indirect Tensile Strength results, welded tuff with 65% was given higher strength than the limestone filler. As a result, it has come up that welded tuff can be used as mineral filler in the hot mix asphalt