Dairy Cow Thermal Balance Model During Heat Stress: Part 2. Model Assessment

Occupational heat stress assessment by the Predicted Heat Strain model.

The work of the main European research teams in the field of thermal factors was coordinated in order to improve significantly the Required Sweat Rate model published as an international standard. Many significant modifications were brought, in particular concerning the effects of forced convection, body movements and exercise and the prediction of the skin temperature as a function of the rect...

Heat stress related dairy cow mortality during heat waves and control periods in rural Southern Ontario from 2010–2012

BACKGROUND Heat stress is a physiological response to extreme environmental heat such as heat waves. Heat stress can result in mortality in dairy cows when extreme heat is both rapidly changing and has a long duration. As a result of climate change, heat waves, which are defined as 3 days of temperatures of 32 °C or above, are an increasingly frequent extreme weather phenomenon in Southern Onta...

Dynamic model of the lactating dairy cow metabolism.

The whole-animal model described in this paper is intended to be a research model with an intermediary structure between sophisticated and simple cow models. The mechanistic model structure integrates the main metabolic pathways of the lactating dairy cow. Milk yield and related feed intake for varying production potentials were considered to be the driving forces and were empirically defined. ...

Monitoring and Managing Energy Balance in the Transition Dairy Cow

Balance functions from a thermal model a

A calculation of the pion balance functions in a thermal model is presented. The total result consists of resonance and non-resonance parts. A satisfactory agreement with the data on Au+Au collisions at √ s N N =130 GeV is found.