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Hydraulic conductivity and compressibility characteristics of bentonite enriched soils as a barrier material for landfills

An experimental program was undertaken for the index and engineering properties (compaction, hydraulic conductivity and consolidation) of various mix proportions of sand, silt and coal ash with bentonite as an admixture to act as a barrier material for landfills. Thirty-four mixes were tested in all with different categories of mixes comprising of bentonite–sand, ...

Non-isothermal stability by linear heating: a fast method for preformulation stability screening of drugs at the discovery and development interface

The non-isothermal method for prediction of chemical stability of pharmaceuticals has been discussed in the literature for almost half a century but it has not yet been systematically evaluated. The purpose of this study was to carry out a comprehensive experimental evaluation of the non-isothermal method against the conventional isothermal method for a fast preformulation ...

Compressive strength behavior of concrete by partial replacement of regular brick with over-burnt brick aggregate

Numerous kinds of coarse aggregates are being used around the world, and most of these coarse aggregates are naturally originated. Due to the gradual diminution of natural resources, modern society is facing a challenge in concrete work which demands a huge amount of coarse aggregate. In Bangladesh, handful brick fields around the country made brick aggregate available as well as ...

A Survey of Some Methods for Real Quantifier Elimination, Decision, and Satisfiability and Their Applications

Effective quantifier elimination procedures for first-order theories provide a powerful tool for generically solving a wide range of problems based on logical specifications. In contrast to general first-order provers, quantifier elimination procedures are based on a fixed set of admissible logical symbols with an implicitly fixed semantics. This admits the use of sub-algorithms ...

Outlier edge detection using random graph generation models and applications

Outliers are samples that are generated by different mechanisms from other normal data samples. Graphs, in particular social network graphs, may contain nodes and edges that are made by scammers, malicious programs or mistakenly by normal users. Detecting outlier nodes and edges is important for data mining and graph analytics. However, previous research in the field has merely ...

Polyhedral Omega: a New Algorithm for Solving Linear Diophantine Systems

Polyhedral Omega is a new algorithm for solving linear Diophantine systems (LDS), i.e., for computing a multivariate rational function representation of the set of all non-negative integer solutions to a system of linear equations and inequalities. Polyhedral Omegacombines methods from partition analysis with methods from polyhedral geometry. In particular, we combine MacMahon’s ...

Polygenic study of endurance-associated genetic markers ACE I/D, ACTN3 Arg(R)577Ter(X), CKMM A/G NcoI and eNOS Glu(G)298Asp(T) in male Gorkha soldiers

Background Gorkhas, a sub-mountainous population of the Himalayan region, are known for strength and bravery. In the present study when “Gorkha” is used without brackets, we are mentioning Gorkhas of Tibeto-Burman origin. Physical capability, strength and endurance are important components of fitness associated with genetic traits. The aim of this study was to examine the endurance ...

GIS-based visualization of integrated highway maintenance and construction planning: a case study of Fort Worth, Texas

Background This paper reports on a case study of the use of visualization of geospatial data that is distributed across data sets and requires integration over time and space to aid decision makers. Like many State Highway Agencies (SHAs) in the United States, the Texas Department of Transportation (TxDOT) is organized along the traditional functional lines of planning, design, ...

Defining the execution semantics of stream processing engines

The ability to process large volumes of data on the fly, as soon as they become available, is a fundamental requirement in today’s information systems. Modern distributed stream processing engines (SPEs) address this requirement and provide low-latency and high-throughput data stream processing in cluster platforms, offering high-level programming interfaces that abstract from ...

Understanding Action and Adventure Sports Participation—An Ecological Dynamics Perspective

Previous research has considered action and adventure sports using a variety of associated terms and definitions which has led to confusing discourse and contradictory research findings. Traditional narratives have typically considered participation exclusively as the pastime of young people with abnormal characteristics or personalities having unhealthy and pathological tendencies ...

Mining and Environmental Health Disparities in Native American Communities

Purpose of Review More than a century of hard rock mining has left a legacy of >160,000 abandoned mines in the Western USA that are home to the majority of Native American lands. This article describes how abrogation of treaty rights, ineffective policies, lack of infrastructure, and a lack of research in Native communities converge to create chronic exposure, ill-defined risks, ...

Investigations for obtaining desired strength of Nylon6 and Fe powder-based composite wire for FDM feedstock filament

In the present work, an effort has been made for modelling the peak strength of Nylon6-Fe powder composite-based feedstock filament (wire) for fused deposition modelling (FDM) process. The developed filament has been used to prepare functional prototypes with ferromagnetic characteristics. The methodology involves the use of historical data approach of response surface methodology ...

Effect of Fe3O4 nanoparticles on Sphingobium yanoikuyae XLDN2-5 cells in carbazole biodegradation

This study explored the effect of Fe3O4 nanoparticles on Sphingobium yanoikuyae XLDN2-5, an important environmentally microorganism in carbazole biodegradation process. Microbial cell/Fe3O4 nanoparticles biocomposite was constructed by assembling Fe3O4 nanoparticles onto the surface of Sphingobium yanoikuyae XLDN2-5 cells. With the increase in Fe3O4 nanoparticles concentration, ...

Providing safe motherhood services to underserved and neglected populations in Yemen: the case for vouchers

States of fragility and insecurity often give rise to urgent health needs that need to be met quickly and effectively, particularly for women and adolescents. Vouchers are a demand-side financing mechanism which can be used to address some of the health challenges faced by women under these circumstances. A number of organisations have begun to use vouchers to enable access to ...

Assessment of organic pollution of an industrial river by synchronous fluorescence and UV–vis spectroscopy: the Fensch River (NE France)

To rapidly monitor the surface water quality in terms of organic pollution of an industrial river undergoing restoration, optical methods (UV–visible spectrometry and fluorescence) were applied in parallel to classical physical–chemical analyses. UV–visible spectra were analyzed using the maximum of the second derivative at 225 nm (related to nitrates), specific absorbance at 254 ...

Simple solution to the optimal deployment of cooperative nodes in two-dimensional TOA-based and AOA-based localization system

Cellular-based cooperative communication is a promising technique that allows cooperation among mobile devices not only to increase data throughput but also to improve localization services. For a certain number of cooperative nodes, the geometry plays a significant role in enhancing the accuracy of target. In this paper, a simple solution to the deployment of cooperative nodes ...

Statistical analysis of arsenic contamination in drinking water in a city of Iran and its modeling using GIS

In this research, probable arsenic contamination in drinking water in the city of Ardabil was studied in 163 samples during four seasons. In each season, sampling was carried out randomly in the study area. Results were analyzed statistically applying SPSS 19 software, and the data was also modeled by Arc GIS 10.1 software. The maximum permissible arsenic concentration in drinking ...