We present a decentralized sequencing algorithm applicable to modular high(est)-density conveyor systems that enables items enter the system randomly from multiple input points. They are rearranged within be retrieved at an assigned output point observing predefined sequence. A variety of applications benefits this, such as storing and retrieving, order picking, packing shipping operations well...

Introduction Warehouses are important components of most supply chains. In terms of cost, they represent approximately 20% of total logistics costs (ELA/AT Kearney, 2004 and Establish/Davis, 2005), whilst in terms of service they are critical to the achievement of customer service levels (Frazelle, 2001), particularly as distribution centres are often the final point in the supply chain for ord...

Planning collision-free paths for multiple robots is important real-world multi-robot systems and has been studied as an optimization problem on graphs, called multi-agent path finding (MAPF). This review surveys different categories of classic state-of-the-art MAPF algorithms research attempts to tackle the challenges generalizing techniques scenarios. Solving problems optimally computationall...

The design and control of effective sortation systems has become more complex as both the volume parcels also number time-definite service options offered by parcel carriers have grown. In this article, we describe approaches for planning two-stage sort operations that explicitly consider time deadlines sorting capacities. sorting, are sorted into groups a primary sorter then from these dispatc...

OBJECTIVE Frequent fast-food consumption is a well-known risk factor for obesity. This study sought to determine whether the availability of fast-food restaurants has an influence on body mass index (BMI). METHODS BMI and individual-level confounding variables were obtained from the 2007-08 Canadian Community Health Survey. Neighbourhood socio-demographic variables were acquired from the 2006...

We quantify the distortionary effects of nexus tax laws on Amazon's distribution network investments between 1999 and 2018. highlight role two features expansion network: densification facilities vertical integration into package sortation. Densification results in a reduction cost shipping orders, but comes at expense higher facility operating costs more expensive areas lower scale economies p...

OBJECTIVES West Nile virus (WNv) emerged in North America in 1999, with the first incursion causing an outbreak of meningoencephalitis in the New York City area which resulted in seven deaths. In the face of WNv, public health professionals recommend various personal protective behaviours (PPBs) that either reduce the risk of mosquito bites (e.g., wearing protective clothing and/or insect repel...