The increase in wage inequality since 1980 in the United States has been more pronounced in larger cities, even after accounting for di¤erences in the composition of the workforce across locations. Using Census of Population and Census of Manufacturers data aggregated to the local labor market level, this paper examines the importance of changes in the factor bias of agglomeration economies, ca...

This paper demonstrates the optical trapping of micron-sized gold nanoparticle aggregates GNAs with a TEM00 mode laser at 532 nm and reports the observation of an unusual light-induced agglomeration phenomenon that occurs besides the trapping of the GNAs. The observed agglomerate has a 60–100 m donut-shaped metal microstructure with the rate of formation dependent on the laser power used. Citra...

Behavioral modification effects for particle-laden turbulent flows are developed and assessed through high-fidelity modeling using an implementation of the mirroring ghost-cell based immersed boundary method in conjunction with direct numerical simulation. The continuous phase uses open-source spectral element method-based solver, Nek5000. A dynamic form is described that also solves interparti...

Entropy Agglomeration (EA) is a hierarchical clustering algorithm introduced in 2013. Here, we generalize it to define Generalized Entropy Agglomeration (GEA) that can work with multiset blocks and blocks with rational occurrence numbers. We also introduce a numerical categorization procedure to apply GEA to numerical datasets. The software REBUS 2.0 is published with these capabilities: http:/...

A rapid and facile signal enhancement method for detecting alpha-fetoprotein (AFP) was developed using the magnetic agglomeration of ferromagnetic nanoparticles and microcantilever sensors. The resonance frequency and deflection of the cantilevers were found to be more than 10-fold greater than that before physical agglomeration of the free nanoparticles around the magnetized nanoparticles.

This paper analyzes the impact of fiscal equalization on asymmetric tax competition when positive agglomeration externalities are present. It shows that equalization of standardized tax revenue improves the spatial allocation of capital provided that agglomeration externalities are sufficiently strong. JEL Classification: R12, H71, H73.

Motivated by potential applications in architecture, we study Darboux cyclides. These algebraic surfaces of order ≤ 4 are a superset of Dupin cyclides and quadrics, and they carry up to six real families of circles. Revisiting the classical approach to these surfaces based on the spherical model of 3D Möbius geometry, we provide computational tools for the identificiation of circle families on ...

This paper develops a model of economic growth and activity locating endogenously on a 3dimensional featureless global geography. The same economic forces influence simultaneously growth, convergence, and spatial agglomeration and clustering. Economic activity is not concentrated on discrete isolated points but instead a dynamically-fluctuating, smooth spatial distribution. Spatial inequality i...

This thesis examines several distinct aspects of agglomeration externalities within an urban economy. In particular, the work focuses on location decisions of agents who face trade-offs between advantages in dense locations versus cheaper land prices available in suburban and exurban regions of the city. Two general equilibrium models of location are presented which study different aspects of l...

In this short note we propose a new method for construction new nice arrangement on the sphere Sd using the spaces of spherical harmonic.