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What are the main types of absolute dating


As can be seen above, there is not a simple answer to this. Depending on how you create your classification, you can find almost any number of different types of information system. However, it is important to remember that different kinds of systems found in organizations exist to deal with the particular problems and tasks that are found in organizations. Consequently, most attempts to classify Information systems into different types rely on the way in which task and responsibilities are divided within an organization. As most organizations are hierarchical, the way in which the different classes of information systems are categorized tends to follow the hierarchy. This is often described as "the pyramid model" because the way in which the systems are arranged mirrors the nature of the tasks found at various different levels in the organization.

Actinic keratoses (AKs) are part of the spectrum of squamous cell carcinomas. They occur as small rough bumps. They are often better felt than seen, and many patients of fair skin have a large number of these lesions. More than 1/100 of these progress into a squamous cell carcinoma. There are many patients who have had a few basal cell carcinomas but 100s of actinic keratoses. The late Dr. Bernard Ackerman, a world-renowned dermatopathologist, referred to AKs as squamous cell carcinomas, superficial type. That is because he felt that one could not draw a line distinctly between the evolution of a squamous cell carcinoma from an AK and that it just evolves, step after step. AKs do not develop into BCCs. When considering AKs to be a prelude to SCC, then they are the most common neoplastic (cancer) growths.

When the categories may be ordered, these are called ordinal variables. Categorical variables that judge size (small, medium, large, etc.) are ordinal variables. Attitudes (strongly disagree, disagree, neutral, agree, strongly agree) are also ordinal variables, however we may not know which value is the best or worst of these issues. Note that the distance between these categories is not something we can measure.


What are the main types of absolute dating

What are the main types of absolute dating



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