To evaluate the transmission of Mycoplasma hyopneumoniae and porcine reproductive and respiratory syndrome virus (PRRSV) by aerosol as either a single or mixed infection, 28 pigs were inoculated intratracheally with M hyopneumoniae on day 0 and infected intranasally with PRRSV on day 35; they were housed together in a barn. To assess the aerosol transmission of M hyopneumoniae as a single infec...

s of papers 31 Saturday, PM, ENVIRONMENT AND MANAGEMENT A 132 Temperature heterogeneity and moisture accumulation in trailers transporting broilers under Canadian winter conditions. T.D. Knezacek*1, G.F. Audren1, M.A. Mitchell2, P.J. Kettlewell3, R.R. Hunter2, H.L. Classen1, S. Stephens1, A.A. Olkowski1, E.M. Barber1, and T.G. Crowe1, 1University of Saskatchewan, Saskatoon, SK, Canada, 2Roslin ...

A field study was conducted to record observations of 41,744 market-weight pigs upon arrival at a commercial abattoir to evaluate the relationships between various independent factors and open-mouth breathing, skin discoloration, lameness, unloading time, and mortality during transport. Observations were recorded from 242 trailer loads on 46 separate days over a period of 14 mo. Travel time (<2...

Articulation angle sensing is an essential component of manoeuvrability and stability control systems for articulated heavy goods vehicles, particularly long combination vehicles. Existing solutions to this task are limited by reliance on trailer modifications or information measurement accuracy, both, restricting commercial adoption. In paper we present a purely tractor-based sensor concept co...

A load plan specifies how freight is routed through a linehaul terminal network operated by a less-than-truckload (LTL) motor carrier. Determining the design of the load plan, a problem of service network design, is critical to effective operations of such carriers. Operations research techniques currently support load plan design, and all models in use or proposed today approximate transportat...

The objective of the present work was to study space allowance in cattle during commercial long haul transport (≥400 km; n = 6,152 journeys). Surveys, delivered to livestock transport carriers, gathered information on the number, BW, and distribution of cattle by trailer compartment as well as the characteristics of the transport vehicles used. Space allowance (SA; m(2)/animal), allometric coef...

This paper examines the kinematic model of an autonomous mobile robot system consisting of a chain of steerable cars and passive trailers, l iked together with rigid bars. The state space and kinematic equations of the system are defined, and it is shown how these kinematic equations may be converted into a multiinput chained form. The advantages of the chained form are that many methods are av...

Nacrtak Mechanized felling was introduced in Slovenia at the beginning of this decade, and before that Slovenian forestry relied on motor manual felling and tractor skidding or cable crane yarding. In this research we are dealing with wood forwarding. Model skidding maps were built, using terrain classification and decision support systems for forwarders and tractor trailers. The purpose of thi...

The article presents the experimental strength evaluation of modular car trailers with a maximum permissible total mass up to 3500 kg and its application assess mechanical box-type trailers. Tests were carried out using an original test bench dedicated fatigue testing. They aimed compare trailer made in traditional technology equipped load-carrying structure containing sandwich panel. As result...