Prospects of a mathematical theory of human behavior in complex man-machine systems tasks

A hierarchy of human activities is derived by analyzing automobile driving in general terms. A structural description leads to a block diagram and a time-sharing computer analogy. The range of applicability of existing mathematical models is considered with respect to the hierarchy of human activities in actual complex tasks. Other mathematical tools so far not often applied to man machine systems are also discussed. The mathematical descriptions at least briefly considered here include utility, estimation, control, queueing, and fuzzy set theory as well as artificial intelligence techniques. Some thoughts are given as to how these methods might be integrated and how further work might be pursued

Studies of planning behavior of aircraft pilots in normal, abnormal and emergency situations

A methodology for the study of planning is presented and the results of applying the methodology within two experimental investigations of planning behavior of aircraft pilots in normal, abnormal, and emergency situations are discussed. Beyond showing that the methodology yields consistent results, these experiments also lead to concepts in terms of a dichotomy between event driven and time driven planning, subtle effects of automation on planning, and the relationship of planning to workload and flight performance

Mapping land cover from satellite images: A basic, low cost approach

Simple, inexpensive methodologies developed for mapping general land cover and land use categories from LANDSAT images are reported. One methodology, a stepwise, interpretive, direct tracing technique was developed through working with university students from different disciplines with no previous experience in satellite image interpretation. The technique results in maps that are very accurate in relation to actual land cover and relative to the small investment in skill, time, and money needed to produce the products

Regional Patterns of Urban Development and Travel Behaviour: It's a matter of proximity in addition to choice

A study of residential location and transport in three provincial counties in Denmark shows that residential location affects the travel behavior of households, and that this affect is still apparent when various socioeconomic characteristics of the households are taken into consideration. The study also shows, that the spatial distribution or geographical spread as well as the size of the different urban centers in the three counties play a significant role in explaining the travel and transport behavior of individual households. Theoretical and empirical evidence from a recent study into the relationship between the residential location and distance to urban centers the Copenhagen metropolitan area shows that individuals emphasize choice rather than proximity to the urban centers for most travel purposes. Thus, as a result, the travel behaviour of households and individuals is primarily influenced by the location of the residence in relation to downtown Copenhagen, whereas the location of the residence in relation to lower-order centers with lower concentrations of facilities only to lesser degree has a bearing on the travel behaviour of households and individuals. The same influence of the distance to urban centers with the highest concentration of facilities seems to apply to households in three provincial counties of Denmark, but in contrast to the metropolitan area of Copenhagen, no single urban center in each of the three counties asserts enough of an influence on the travel behaviour to stand alone. Although cities like Holstebro in the county of Ringkoebing, and Aalborg in the county of North Jutland have a significant effect on travel behaviour, it seems that the location of the residence in relation to a conglomeration of 1st order urban centers in each of the provincial counties is needed to describe the relationship between residential location and regional patterns of urban development

Kulsyrens Bearbejdelse og Bladenes Bygning i deres Forhold til Lyset. Ved Laboratorieassistent.

Kulsyrens Bearbejdelse og Bladenes Bygning i deres Forhold til Lyset. Ved Laboratorieassistent

Plantefysiologike Meddelelser.

Plantefysiologike Meddelelser

Plantefysiologiske Meddelelser.

Plantefysiologiske Meddelelser