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Heterospory is the production of spores of two different sizes and sexes by the sporophytes of land plants. The smaller of these, the microspore , is male and the larger megaspore is female. Heterospory evolved during the Devonian period from isospory independently in several plant groups: the clubmosses , the ferns including the arborescent ...
The US Navy initiated the Military Manpower versus Hardware (HARDMAN) Methodology in 1977 to address problems with manpower, personnel and training in the service. [7] In 1980, The National Academies of Sciences, Engineering, and Medicine established the Committee on Human Factors, which was later renamed the Committee on Human Systems Integration. [8]
Social construction of technology (SCOT) is a theory within the field of science and technology studies. Advocates of SCOT—that is, social constructivists—argue that technology does not determine human action, but that rather, human action shapes technology. They also argue that the ways a technology is used cannot be understood without ...
The importance of stone tools, circa 2.5 million years ago, is considered fundamental in the human development in the hunting hypothesis. [citation needed]Primatologist, Richard Wrangham, theorizes that the control of fire by early humans and the associated development of cooking was the spark that radically changed human evolution. [2]
Spores of two distinct sizes (heterospory or anisospory): larger megaspores and smaller microspores. When the two kinds of spore are produced in different kinds of sporangia, these are called megasporangia and microsporangia. A megaspore often (but not always) develops at the expense of the other three cells resulting from meiosis, which abort.
Interspecies design is characterized by the participation of more than one species in design activities and the use of design outcomes by multiple species. This concept extends to all design practices that could potentially involve multiple species, making it a broad and inclusive field.
Social design is the application of design methodologies in order to tackle complex human issues, placing the social issues as the priority. Historically social design has been mindful of the designer's role and responsibility in society, and of the use of design processes to bring about social change. [ 1 ]
Science, Technology, & Human Values (ST&HV) is a peer-reviewed academic journal that covers research on the relationship of science and technology with society.From the "Newsletters of the Program on the Public Conceptions of Science" that Gerald Holton established in 1972, it became The Newsletter on Science, Technology, & Human Values, in 1976. [1]