Dust particles generated in low temperature plasmas as used for microelectronics fabrication are often agglomerates of smaller monodisperse particles. The transport of these agglomerates, and the subsequent contamination of surfaces, depends on the details of ion-momentum transfer ~ion drag! to, and electrostatic forces on, the agglomerate. Given that the charge distribution on the surface of t...

Although scholars have examined antecedents to agglomeration, we understand less than we should about the impact of institutional environments. We theorize that characteristics of a country’s institutional environment encourage firms to agglomerate. To test our hypotheses, we examine the location pattern of 948 plant investments made by 274 firms across 29 countries in the global semiconductor ...

An agglomerative clustering algorithm merges the most similar pair of clusters at every iteration. The function that evaluates similarity is traditionally handdesigned, but there has been recent interest in supervised or semisupervised settings in which ground-truth clustered data is available for training. Here we show how to train a similarity function by regarding it as the action-value func...

There are several characteristics of silver agglomerates that are not incorporated in existing models for agglomerate dynamics. These characteristics include particle alignment in the electric field, necking between particles, polydispersity of the primary particles, and variable primary sphere size. Estimates of these features on the agglomerate dynamics were computed as perturbations to the C...

An experimental study is conducted to determine the effect of different types of nanoparticles on the gas fluidization characteristics of nanoparticle agglomerates. Taking advantage of the extremely high porosity of the bed, optical techniques are used to visualize the flow behavior, as well as to measure the sizes of the fluidized nanoparticle agglomerates at the bed surface. Upon fluidizing 1...

In October 2011 the European Commission published its recommendation on a common definition of the term “nanomaterial” for regulatory purposes. According to this recommendation, a nanomaterial is a natural, incidental or manufactured material containing particles, in an unbound state or as an aggregate or as an agglomerate and where, for 50% or more of the particles in the number size distribut...

Keywords: Powder dispersion Impact angle Agglomerates Computational fluid dynamics Discrete element method a b s t r a c t This paper numerically investigated the mechanisms of powder de-agglomeration on mechanical impaction, aiming to explain the experimental observations in our previous study (Adi et al., 2010). A numerical model based on a coupled computational fluid dynamics (CFD) and discr...