Multiscale modeling for cement-based materials, such as concrete, is a relatively young subject, but there are already a number of different approaches to study different aspects of these classical materials. In this paper, the parameter-passing multiscale modeling scheme is established and applied to address the multiscale modeling problem for the integrated system of cement paste, mortar, and...

The presence of melt ponds on the surface of Arctic sea ice significantly reduces its albedo, inducing a positive feedback leading to sea ice thinning. While the role of melt ponds in enhancing the summer melt of sea ice is well known, their impact on suppressing winter freezing of sea ice has, hitherto, received less attention. Melt ponds freeze by forming an ice lid at the upper surface, whic...

The publication in 1984 of Richard Freeman and James Medoff’s What Do Unions Do?, which summarized and synthesized results from their broad-based research program, was a landmark in labor economics and industrial relations. What Do Unions Do? quickly changed the subject matter and approach for scholars studying unions. The models (or descriptions) of unions employed by labor economists were ext...

1Vasoactive Peptide Group, Department of Clinical Research, University of Bern, 3004 Bern, Switzerland 2Centre for Rheumatology and Connective Tissues Diseases, Royal Free Hospital, Pond Street, London NW3 2QG, UK 3Vascular Unit, Academic Department of Surgery, Royal Free Hospital, Pond Street, London NW3 2QG, UK 4Division of Surgery & Interventional Science, University College London, Royal Fr...

background: heavy metals have destructive and irreversible effects on the human, plants and animals. some industries in yazd enter industrial wastewater to municipal wastewater collection system. this can lead to high levels of heavy metals in wastewater and in turn in the wastewater treatment plant effluent.   methods: this study was carried out during four months from december 22, 2009 to may...

T. AHMAD • Department of Mathematics, Faculty of Science, University of Technology Malaysia, 81310 Skudai, Johor, Malaysia. • Electronics Research Group, School of Engineering, Sheffield Hallam University, City Campus, Pond Street, Sheffield S1 1WB, UK M. A. HOSSAIN • Department of Computing, University of Bradford, Bradford BD7 1DP, UK. • Electronics Research Group, School of Engineering, Shef...

Erosion and sedimentation are normal geologic processes which are usually accelerated by irrigating agricultural lands. Of the sediment in irrigation runoff, 70% was removed in a sedimentation pond. Removal efficiency correlated well with flow rate and sediment concentration. Pond design should provide maximum velocity reduction early in pending, allow adequate storage space for the larger part...

In recent years, the Lamb wave analysis by the multi-channel analysis of surface waves (MASW) for concrete structures has been an effective nondestructive evaluation, such as the condition assessment and dimension identification by the elastic wave velocities and their reflections from boundaries. This study proposes an effective Lamb wave analysis by the practical application of MASW to concre...

We analyze the concrete security provided by a signature scheme described in a recent Internet Draft by McGrew and Curcio.

Decision support systems (DSS) are potentially valuable tools for assessing the economic and ecological impacts of alternative decisions on aquaculture production. In this paper, we discuss the philosophy of design, functional modules and application areas of POND, a decision tool that has been developed to allow analysis of pond aquaculture facilities by the use of a combination of simulation ...