n engl j med 365;25 nejm.org december 22, 2011 2438 lations and the actual day of the week when dialysis was performed in our study population. In the U.S. population overall, the variability in mortality is much smaller than we observed among typical patients receiving hemodialysis. For example, among 2,428,343 deaths in 2007, the proportions occurring on Sunday through Saturday were 14.2%, 14...

OBJECTIVES To examine gender and racial disparities in ischaemic heart disease (IHD) mortality related to metalworking fluid exposures and in the healthy worker survivor effect. METHODS A cohort of white and black men and women autoworkers in the USA was followed from 1941 to 1995 with quantitative exposure to respirable particulate matter from water-based metalworking fluids. Separate analys...

In this article we introduce the main research lines concerning CSCW and groupware, which are forming the core foundation of Collaborative Working Environments (CWE). Furthermore, we introduce the problematic aspects in CWE and the features and recommendations for the integration of CWE in organizations. Through this issue readers will learn new paradigms for the building of CWE as well as dire...

We report on the activities of the ``QCD Tools for heavy flavors and new physics searches'' working group of the Run II Workshop on QCD and Weak Bosons. The contributions cover the topics of improved parton showering and comparisons of Monte Carlo programs and resummation calculations, recent developments in Pythia, the methodology of measuring backgrounds to new physics searches, variable flav...

Shahdad and Yahya which are two important prehistoric sites in the Kerman Province, are of most important forArchaeometallurgical studies. During excavations at these sites a number of metal objects have been discovered.Moreover, evidence of metal working on the surface testify to manifacturing of metal objects. This also shows that thesite might have experienced craft specialization.The follow...

Cellulose-based materials functionalized with fluorescence sensors are highly topical and are employed in many areas of functional materials, including the sensing of heavy-metal ions and anions as well as being widely used as chemical sensors and tools for environmental applications. In this Review, we cover recent progress in the development of cellulose-based fluorescence sensors as parts of...