Invasive crayfish (family Cambaridae) displace native species and alter aquatic habitat, community structure, ecosystem function. We evaluated whether chemical control can be a reliable agent for to ensure that shipments from fish hatcheries did not result in new infestations of invasive crayfish. A series acute (≤1 h) toxicity tests were conducted evaluate the cypermethrin pyrethrin crayfish, ...

The paper investigates a two-echelon production-delivery supply chain model for products with stochastic demand and backorder-lost sales mixture under trade-credit financing. manufacturer delivers the retailer’s order quantity in number of equal-sized shipments. replenishment lead-time is such that it can be crashed to minimum duration at an additional cost treated as investment. Shortages inve...

material shipments (10–14). Rerouting hazardous materials shipments with the objective of reducing risk is complex because of the many variables that interact to affect risk. Quantitative risk analysis (QRA) of hazardous material transportation dates to the 1970s. Although advances in methodology continue, QRA has matured to the point that it is an effective tool and has been used to inform dec...

In the United States, railways are the major means to trans-continentally move goods from ports to the various inland destinations. Due to mergers and abandonment of rail lines, there has been a reduction in the track capacity, concentrating rail traffic to fewer lines. In addition to this, booming trade with Pacific Rim nations has seen the annual trade in the Ports of Los Angeles and Long Bea...

We use two very large datasets to obtain some of the first systematic micro evidence on how production in vertically integrated firms differs from that of unlinked producers in the same industries. The Economic Census lets us observe virtually every establishment in the private economy, and crucially, the organizational structures of the firms that own them. The Commodity Flow Survey microdata ...

Containers have become one of the most concrete breach for global security, and there is a pressing need of novel methods to target highly risky container shipments. In this paper we present the ongoing research carried out at the European Commission Joint Research Centre for the development of data mining and semantic approaches for route based risk indicators to discover anomalous container t...

We consider a manufacturer that must fill stochastic demand. When shortages occur, the manufacturer may choose to meet the unmet demand with overtime production and/or by premium freight shipments. We derive optimal production policies for regular and overtime production and discuss the tradeoffs involved.

Between 1914 and 2007, a quarantine protected California avocado, Persea americana Mill., groves from pests that might be introduced into the state along with fresh, imported avocados. Soon after Mexican avocados were first allowed entry on 1 February 2007, live specimens of several species of armored scales (Hemiptera: Diaspididae) not believed to be present in California were detected on 'Has...

Tropical leaf vegetables are grown in the tropics and are rich sources of nutrients, particularly minerals, and vitamins (Oomen and Grubben 1978). A number of species and cultivars have been introduced and grown in the continental US on a limited-scale, particularly in the southern region (Lamberts 1993). The US is a major market for tropical and specialty greens and most of the shipments come ...