Proposes the metatheoretical stance of skeptical pluralism as a means of ordering and integrating knowledge of human communication. Uses a typology of modern philosophies suggested by Richard McKeon to identify four different conceptions of communication and science (phenomenal, operational, nationalistic, and phenomenological). (MM)

Collection of two short descriptions of chemical principles seen in life situations: the autocatalytic reaction seen in the bombardier beetle, and molecular potential energy used for quick roasting of beef. Brief reference is also made to methanol lighters. (PS)

In his remarkable treatise Reflexes of the Brain (1863) Sechenov developed a detailed program which, properly evaluated, laid the foundation for an objective science of psychology not only in Russia but on a world scale. (Author)

The physics of vertical jumping is described as an interesting illustration for motivating students in a general physics course to master the kinematics and dynamics of one dimensional motion. The author suggests that mastery of the physical principles of the jump may promote understanding of certain biological phenomena, aspects of physical…

Presents the history of the discovery of pulsars, observations that have been made on pulsar radiation, and theories that have been presented for its presence and origin. Illustrations using pulsar's properties are presented in mechanics, electromagnetic radiation and thermodynamics. (DS)

Surveys the responses given to a physics problem regarding calculations of the temperature difference between the internal and external surfaces of a pan with boiling water. Presents a numerical answer to the problem. (DS)

Reports a verification that hot water begins to freeze sooner than cooler water. Includes the investigations that lead to the conclusions that convection is a major influence, water content may have some effect, and the melting of the ice under the container makes no difference on the experimental results. (DS)

Presents a general review of current practical applications of the properties of superconducters. The devices are classified into groups according to the property that is of primary importance. The article is inteded as a first introduction for students and professionals. (Author/DS)