This paper describes the migration of four commonly found volatile organic compounds (VOCs) in landfill leachates e.g., benzene, toluene, ethylbenzene, and xylenes through 1.5mm thick high density polyethylene (HDPE) geomembranes. Diffusion and sorption tests were conducted at room temperature (i.e., 22C) on both unaged and 13-month aged geomembrane samples. Ageing of geomembrane was carried ou...

Human beings are facing a global mineral resource crisis. The earth's finite supply of minerals İs being used by a population that is growing faster than at any time in history. To make matters worse, mineral consumption İs growing even faster man the population. Although we need more minerals to supply society, we are becoming increasingly aware that their production and use pollute the planet...

This work studies the impact of the pollution attack in a fully connected live video streaming P2P push based overlay network, as well as the effectiveness of using trusted peers as the only defense mechanism. Determining the best strategies for both: i) trusted peers (TPs) with the aim to detect and expel malicious peers (MPs) and ii) malicious peers in order to pollute without being detected,...

An overview of recent advances in computational aeroacoustics (CAA) is presented. CAA algorithms must not be dispersive and dissipative. It should propagate waves supported by the Euler equations with the correct group velocities. Computation domains are inevitably finite in size. To avoid the reflection of acoustic and other outgoing waves at the boundaries of the computation domain, it is req...

This paper presents evidence on whether multinationals are flocking to developing country "pollution havens". We begin with data from four developing countries, examining the pattern of foreign investment in Mexico, Venezuela, Morocco and Cote d'Ivoire. We find almost no evidence that foreign investors are concentrated in "dirty" sectors. We then examine the behavior of multinationals located i...

Branch prediction accuracies determined using tracedriven simulation do not include the eflects of executing branches along a mispredicted path. However, branches along a mispredicted path will pollute the branch prediction structures i f no recovery mechanisms are provided. Without recovery mechanisms, prediction rates will suger. In this paper, we determine the appropriateness of recovery mec...

Mycoplasma contaminations have a multitude of effects on cultured cell lines that may influence the results of experiments or pollute bioactive substances isolated from the eukaryotic cells. The elimination of mycoplasma contaminations from cell cultures with antibiotics has been proven to be a practical alternative to discarding and re-establishing important or irreplaceable cell lines. Differ...

The design of dynamic, adaptable discrete-event systems calls for adequate modeling formalisms and tools in order to manage possible changes occurring during system’s lifecycle. A common approach is to pollute the design with details not concerning the current system behavior, rather its evolution. That hampers analysis, reuse and maintenance in general. A Petri net-based reflective model (base...

Despite the large and growing literature on microplastics in the ocean, little information exists on microplastics in freshwater systems. This study is the first to evaluate the abundance, distribution, and composition of pelagic microplastic pollution in a large, remote, mountain lake. We quantified pelagic microplastics and shoreline anthropogenic debris in Lake Hovsgol, Mongolia. With an ave...

Urban rivers are vulnerable to different processes and activities that pollute and degrade the water ecosystem. Restoring their health poses a huge challenge to governments and other actors. This paper examines a ‘success’ case of a LGU-initiated river rehabilitation program in the Philippines in two sequential phases; the first phase which targeted physical restoration of the riverbanks and so...