Denison University

About: Denison University is a education organization based out in Granville, Ohio, United States. It is known for research contribution in the topics: Population & Politics. The organization has 921 authors who have published 1828 publications receiving 41060 citations. The organization is also known as: Denison & DU.

The evolution and frequency of female color morphs in Holarctic Odonata: why are male-like females typically the minority?

Abstract: We compiled data on the occurrence and frequency of distinct female variants among Holarctic Odonata and interpreted the data in light of harassment-based hypotheses. The major source of male confusion for male mimicry hypotheses is predicted to be signal similarity between andromorphs and male distractors; for the learned mate recognition hypothesis (LMR), it is predicted to be variation in female signals. Mapping morphism state onto molecular phylogenies of Ischnura and Enallagma failed to resolve the general ancestral female condition. However, it appeared that the andromorphic state may be ancestral in one case, and that blue structural colors were ancestral to orange and green pigmentations. Of the polymorphic species surveyed, 13% had more than two morphs, 4% had multiple heteromorphs but no andromorph, and 7% of ‘monomorphic’ congeners were functionally polymorphic because developmental variants mate. Such female signal variation lies beyond the scope of simple male mimicry, but neverthele...

Conspiracy Theories as Ethnosociologies: Explanation and Intention in African American Political Culture:

Abstract: Attributing social maladies to deliberate plots by hostile conspirators is an American political tradition dating back to the 1760s, beginning with rumors of a British plan to remove colonists' rights and continuing through to the John F. Kennedy assassination theories. Most recently, conspiracy theories have been seen as prevalent in the African American community,' as general explanations for the spread of AIDS and crack cocaine and for the lack of occupational and educational opportunities for Blacks, as well as explanations for more specific events, such as the cover-up theory of the Tawana Brawley case or Leonard Jeffries' positing of a Hollywood conspiracy to promulgate denigrating images of Blacks. Although conspiracy theories are not unique to African Americans,2 conspiracy theories held by African Americans that seek to explain ethnic inequality are intrinsically interesting as a subset of conspiracy theories because they may indicate areas of tremendous uncertainty in interethnic relations. In addition, they may shape behavior by providing parameters for political and social action in racial conflicts. In short, conspiracy theories express deep-running ethnic tensions while they influence the directions of interethnic interaction. The rise of conspiracy theories has been met with dismay and alarm from some social commentators. Among the concerns is the

Probing Pre-Protostellar Cores with Formaldehyde

Abstract: We present maps of the 6 cm and 1.3 mm transitions of H2CO toward three cold, dense pre-protostellar cores (PPCs): L1498, L1512, and L1544. The 6 cm transition is a unique probe of high-density gas at low temperature. However, our models unequivocally indicate that H2CO is depleted in the interiors of PPCs, and depletion significantly affects how H2CO probes the earliest stages of star formation. Multistage, self-consistent models, including gas-dust energetics, of both H2CO transitions are presented, and the implications of the results are discussed.

The Social Constitution of Perceiver-Environment Reciprocity

Abstract: Although animal—environment reciprocity is central to ecological psychology, one facet of this viewpoint remains underappreciated: organisms alter environments so as to better function in them In many species this activity of “niche construction” includes coordinated actions by individuals jointly working toward common ends Mounting paleontological and archeological evidence indicates that human evolution should be viewed in the light of such social considerations The environment of our immediate human ancestors was marked by, among other things, group settlements, manufactured stone tools, and extensive migration An emerging species such as ours, whose distinctive psychological qualities offered a selective advantage relative to these conditions, would flourish particularly if it could preserve the gains of prior generations even as its members continued to transform econiche features in functionally significant ways This evolutionary perspective, with its due recognition of sociocultural processes,