Across advanced economies, affordable housing shortages are pushing low-income voters out of cities. Left governments frequently exacerbate these by eliminating public housing. Why does the pursue policies that displace its voters? We argue Left’s long-term rebalancing towards middle class and away from an increasingly stigmatized “underclass” has significantly attenuated trade-offs inherent in...

This paper presents a nonlinear mixed-integer programming model to minimize the stoppage cost of mixed-model assembly lines. Nowadays, most manufacturing firms employ this type of line due to the increasing varieties of products in their attempts to quickly respond to diversified customer demands. Advancement of new technologies, competitiveness, diversification of products, and large customer ...

As bike-share systems expand in urban areas, the wealth of publicly available data has drawn researchers to the novel operational challenges these systems face. The key challenge is to meet user demand for available bikes and docks by rebalancing the system. This paper addresses the optimization problems that arise from these efforts. In particular, we provide new models to guide truck routing ...

Abstract The lack of electron donors in oxygen-rich aquatic environments limits the ability natural denitrification to remove excess nitrate, leading eutrophication ecosystems. Herein, we demonstrate that electron-rich substances river or lake sediments could participate long-distance rebalancing reduce nitrate overlying water. A microstructure containing Dechloromonas and consisting an inner l...

This research addresses the mixed-model assembly line (MMAL) by considering various constraints. In MMALs, several types of products which their similarity is so high are made on an assembly line. As a consequence, it is possible to assemble and make several types of products simultaneously without spending any additional time. The proposed multi-objective model considers the balancing and sequ...

Background: Work-related musculoskeletal disorders (WMSDs) may involve all parts of the body, and have been a worldwide problem. Employed women are two to five times more likely to report such problems, and assembly lines suspected to induce more WMSDs because of high rate of repetitive motions. Methods: The aim of this study to determine the prevalence of WMSDs in women workers of an automobi...

Expression of heterologous methionine-rich proteins to increase the overall sulfur amino acid content of soybean seeds has been only marginally successful, presumably due to low accumulation of transgenes in soybeans or due to gene silencing. Proteome rebalancing of seed proteins has been shown to promote the accumulation of foreign proteins. In this study, we have utilized RNAi technology to s...

In this paper we develop methods for maximizing the throughput of a mobility-on-demand urban transportation system. We consider a finite group of shared vehicles, located at a set of stations. Users arrive at the stations, pick-up vehicles, and drive (or are driven) to their destination station where they drop-off the vehicle. When some origins and destinations are more popular than others, the...