The appearance of new technologies in europe after the 11th century produced a variety of social consequences, both progressive and problematical. For example, the heavy plow made it possible to farm new lands, particularly the rich, alluvial soils on the european plain, and this ability helps account for the northward shift of european agriculture in the middle ages. Then, because the heavy plow and its team of oxen or horses was an expensive tool, beyond the capacities of individual peasant farmers to own, it brought a new type of ownership and patterns of communal agriculture and communal animal husbandry, thus solidifying the medieval village and the manorial system as the bedrock of european society at least through the french revolution. Among the social impacts of the employment of the heavy plow and its traction animals on equipment ownership, one can refer to.

The paced decision model is a tool that can be used in a variety of situationsit should clarify one's alternative and criteriapaced decision-making processused to solve problems in a rational, systematic way- state the problem- list the alternatives- identify criteria- evaluate alternatives- make a decisionstep 1 - problem: the first step is to state the problem. what car should i buy? step 2 - alternatives: list some likely alternativesstep 3 - criteria: the next step is to establish criteria - what is the most important to you. (these criteria need to be state din positive terms, i.e., stated as you what you want.) ex costs less than $4000; gets at least 25 mpg,; seats at least 4; has ac;   step 4 - evaluate each alternative by comparing it to criterion. if an alternative meets a criterion, pus a + in that box - if not put a -. at the end look to see which alternative meets your most important criteria. (some criteria will be more important than others. those may be given greater weight. and, if an alternative costs more than $4000, it probably won't matter if there is a + in all the other boxes.)step 5 - decide: based on the insights gained, make a choice. be sure to explain that it won't always be the one with the most +'s - since some criteria count more than othersthe strength of this tool lies in the ability of each student to determine their own criteria for evaluation