In mechanized ground-based forestry, machines operate on rough soils that, ideally, should remain unaffected by the operation. This implies small (that is, light) loads and careful driving are required. However, economical rationality implies large loads and high speeds. Recently, the concept of adding a trailer to a conventional forwarder has been revived, with the objective of addressing both...

The purpose of this study was to develop an effective method for trailer loading horses based on principles of positive reinforcement. Target training and shaping were used to teach trailer-loading behavior to 5 quarter horse mares in a natural setting. All 5 had been trailer loaded before through the use of aversive stimulation. Successive approximations to loading and inappropriate behaviors ...

The directional response and roll stability characteristics of a partly filled tractor semi-trailer vehicle, with cylindrical tank, are investigated in various maneuvers. The dynamic interaction of liquid cargo with the tractor semi-trailer vehicle is also evaluated by integrating a dynamic slosh model of the partly filled tank with five-degrees-of-freedom of a tractor semi-trailer tank mode...

Motivated by a situation faced by infrastructure service providers operating in urban areas with accessibility restrictions, we study the truck and trailer routing problem with time windows (TTRPTW). In this problem the vehicle fleet consists of trucks and trailers which may be decoupled. A set of customers has to be served and some of the customers can only be accessed by the truck without the...

Here we discuss a new integer multicommodity ow problem in which the commodities can not be shipped independently. The problem emerges in the routing of airplane parts from production sites to assembly sites. The parts are of such size that they have to be carried on dedicated trailers. Each type of part has its own type of trailer. A part is loaded on its trailer after it is produced, carried ...

The seemingly overnight emergence of a form of promotion known as ‘book trailers’ shortly after the turn of the millennium suggests a shift in the marketing and promotional strategies employed within the publishing industry. This article follows the historical development of the audio-visual form known as the ‘book trailer’ across its history with a view to understanding the form itself. This a...

Here we discuss a new integer multicommodity ow problem in which the commodities can not be shipped independently. The problem emerges in the routing of airplane parts from production sites to assembly sites. The parts are of such size that they have to be carried on dedicated trailers. Each type of part has its own type of trailer. A part is loaded on its trailer after it is produced, carried ...

Materials and methods: Each model trailer was contaminated with intestinal content from a pig experimentally infected with PCV2, washed, and disinfected with one of four protocols. Between protocol steps, swabs were collected from six different areas of each trailer and tested for PCV2 DNA. Disinfection protocols were quaternary ammonium compound (DISF1), oxidizing agent containing potassium pe...

the vehicle position given by p, , the vehicle orientation This paper reports some results of the research about the a , and the trailer orientation , autonomous guidance of articulated vehicles. Particularly, the design of stable and robust simple fuzzy controllers for It is well known that backing up control of truck-trailer is the backing-up manoeuvres of truck-trailer vehicles is a difficul...