Thanks to policy incentives in a growing number of jurisdictions, wind and photovoltaics have become the two fastest growing energy sources in the world. They are now dominated by global corporations with the resources to support their installations with the reliability demanded by the electric utility industry. To date, most of this growth has been targeted at continent-scale electric grids, w...

This paper is concerned with the recent wave of Hong Kong immigrants into Van couver. The stage is set for this discussion by first explaining some background behind Canadian imm igration policy and then discussing the history of Chinese immigrants in Vancouver. From these discu ssions we are informed that Canadian immigration policy was historically ethnocentric and only began to change in the...

Welfare programs are often implemented in-kind to promote outcomes that might not be realized under cash transfers. I use a randomized controlled trial of the Mexican government’s Food Assistance Program (‘PAL’) to test whether this form of paternalism is necessary, comparing precisely measured consumption and health outcomes under both inkind food and cash transfers. Importantly, I …nd that ho...

We consider the problem of recognition of a printed word belonging to a limited dictionary. The main difficulty comes from the fact that this word can be printed using different fonts, sizes, and positions on the page. Invariant moment methods for word recognition developed by Hu [5] and Li [6] are unreliable when the quality of the word image is degraded by noise. In this paper we investigate ...

Secreted proteins including cytokines, chemokines, and growth factors represent important functional regulators mediating a range of cellular behavior and cell-cell paracrine/autocrine signaling, e.g., in the immunological system (Rothenberg, 2007), tumor microenvironment (Hanahan and Weinberg, 2011), or stem cell niche (Gnecchi etal., 2008). Detection of these proteins is of great value not on...

We study the hydrogen storage properties o f p lanar boron sheets and com pare them to those o f graphene. T he b inding o f m olecular hydrogen to the boron sheet (0.05 eV ) is stronger than that to graphene. W e find that d ispersion o f alkali m etal (A M = Li, Na, and K) atom s onto the boron sheet m arkedly increases hydrogen binding energies and storage capacities. The unique structure o ...

Many set functions F in combinatorial optimization satisfy the diminishing returns property F{A U X) — F(A) > F(A' U X) — F(A') for A C A!. Such functions are called submodular. A result from Nemhauser etal. states that the problem of selecting ^-element subsets maximizing a nondecreasing submodular function can be approximated with a constant factor (1 — 1/e) performance guarantee. Khuller eta...