The study demonstrates that this alternative is more effective than the existing conventionally used entropy-based land use mix index for explaining pedestrian volume. For the index, different areas are needed to generate a unit of pedestrian volume, whose measure is m2/person/day. The study investigates an entropy-based weighted land use mix index, which is weighted by different land use types. Pedestrian volume was selected as the dependent variable as it represents the vitality of districts, which many recent urban studies now consider important.
Units of entropy how to#
In future built-environment studies, the utility of the weighted land use mix index is expected to improve if studies include how to find the accurate weighting of the land use in estimating the pedestrian volume.Ībstract = "This study proposes an alternative to the conventional entropy-based land use mix index, which is generally used to measure the diversity of land use. By analysing 9727 surveyed locations of pedestrian volume in Seoul, Korea, the study demonstrates that the weighted land use mix index, rather than the conventionally used entropy-based land use mix index, can improve the explanatory power of the estimation model for the relationship between pedestrian volume and built environments, showing consistent results throughout the empirical analysis. The research confirms that the conventionally used entropy-based land use mix index can have a positive or negative impact depending on the land use characteristics of the survey points because the conventionally used entropy-based land use mix index has a non-linear relationship with pedestrian volume. For the index, different areas are needed to generate a unit of pedestrian volume, whose measure is m 2/person/day. When entropy increases, a certain amount of energy becomes permanently unavailable to do work.This study proposes an alternative to the conventional entropy-based land use mix index, which is generally used to measure the diversity of land use. Entropy is associated with the unavailability of energy to do work. In the second case, entropy is greater and less work is produced. The same heat transfer into two perfect engines produces different work outputs, because the entropy change differs in the two cases. There is 933 J less work from the same heat transfer in the second process. We noted that for a Carnot cycle, and hence for any reversible processes, We can see how entropy is defined by recalling our discussion of the Carnot engine. That unavailable energy is of interest in thermodynamics, because the field of thermodynamics arose from efforts to convert heat to work. Although all forms of energy are interconvertible, and all can be used to do work, it is not always possible, even in principle, to convert the entire available energy into work. Entropy is a measure of how much energy is not available to do work. Recall that the simple definition of energy is the ability to do work. Making Connections: Entropy, Energy, and Work