A comparative study of two coagulants, aluminum sulfate (Alum) and aluminum chlorohydrate (ACH), used in parallel in a full scale water treatment plant (WTP) in Ohio from October 2009 to December 2012, was conducted to determine disinfection by-product (DBP) formation potential removal based on both dissolved organic matter (DOM) and fluorescence-derived metrics. Water quality parameters and fl...

BACKGROUND Evidence for a relationship between trihalomethane (THM) or haloacetic acid (HAA) exposure and adverse fetal growth is inconsistent. Disinfection by-products exist as complex mixtures in water supplies, but THMs and HAAs have typically been examined separately. OBJECTIVES We investigated joint exposure at the individual level to THMs and HAAs in relation to birth weight in the mult...

A major challenge for modern steelmaking is the reduction of CO2 emissions. In this regard, blast furnace (BF) process critical due to its high associated This investigation assesses impact tuyere-injected fuels on BF Specifically, CFD results obtained previously at Purdue University Northwest are analyzed obtain emissions when natural gas (NG), syngas, hydrogen or hydrogen/NG injected. compare...

This paper describes a constrained bin-packing •problem (CBPP) and an approximate, anytime algor i thm for solutions. A CBPP is a constrained version of the bin-packing problem, in which a set of items allocated to a bin are ordered in a way to satisfy constraints defined on them and achieve near-optimality. The algor i thm for CBPP uses a heuristic search for labeling edges w i th a binary val...

BACKGROUND Findings on water and total fluid intake and bladder cancer are inconsistent; this may, in part, be due to different levels of carcinogens in drinking water. High levels of arsenic and chlorinated by-products in drinking water have been associated with elevated bladder cancer risk in most studies. A pooled analysis based on six case-control studies observed a positive association bet...

Background: Trihalomethanes (THMs) occurring in public drinking water sources have been investigated in several epidemiological studies of fetal death and results support a modest association. Other classes of disinfection by-products found in drinking water have not been investigated. Aims: To investigate the effects of haloacetic acid (HAA) compounds in drinking water on stillbirth risk. Meth...

BACKGROUND Various studies have shown that non-communicable diseases (NCDs) especially diabetes and hypertension are prevalent among older women living in South African urban areas, placing a heavy burden on the healthcare system. This study aimed to understand the health-seeking behaviour, healthcare practices and prevalence of traditional herbal medicine (THM) use among older women self-repor...

W i tzgal l [ 7 L comment ing on the gradient project ion methods of R . Frlsch and J . B . Rosen , states: "More or less a l l algori thms for solving the l inear programming problem are known to be modificat ions of an algori thm for matrix inversion . Thus the simplex method corresponds to the Gauss-Jordan method . The methods of Frisch and Rosen are based on an interest ing method for inver...

In this paper, we consider a connected undirected graph with n nodes. An asynchronous dist r ibuted algori thm is described which determines a spanning tree of the graph. Moreover, if the edges of the graph are weighted, the same algorithm can compute a minimum-weighted spanning tree. This algori thm can be favourably compared to the one of Gallagher et al. [6] in the following way: identical a...

2014 Some aspects of the thermodynamic state of CdTe crystals grown by different zone passing techniques (sealed ingot zone refining technique and THM in tellurium solvent) are considered with regard to the general objective of getting high resistivity crystals. A vapour growth technique, called sublimation THM, which reduces several drawbacks of classical THM using a tellurium solvent, is deve...