The use of alternating currents for submarine marine cable transmission

This paper contains the results of experiments performed by members of the Signal Corps Research Laboratory, Bureau of Standards, in an attempt to develop a method or methods of signal transmission over submarine cables which would permit of a more effective use of existing cable systems.In the method proposed and developed, signals are transmitted by means of alternating currents simultaneously with the normal battery of direct-current operation of the cable. Currents of several different frequencies may be used, reserving a given frequency for each message, and by tuning or equivalent methods at the receiving end these messages may be separated, so that the simultaneous transmission of a number of messages is redered possible.Accurate determination of the fundamental physical properties of a particular cable for different frequencies has been accompalished, and the results are given herewith. From these physical properties accurate calculations for any length of cable can be made, so that the design of proper apparatus becomes purely a laboratory problem.Actual trial of the proposed alternating-current method was made covering distances up to approximately 700 kilometres, with results which were in all cases completely satisfactory, indicating that the method is an entirely feasible one, and one which will render cables of this length, and undoubtedly of several times this length, much more useful.     

Severe acute respiratory syndrome (SARS) and the rhetorical construction of "bad" scientific work

How are secondary accounts of "bad" scientific practice constructed? How do they engage with the primary data produced by "bad" scientists? And what happens to those primary data as generations of secondary accounts purporting to describe them accumulate? This paper addresses such questions via a case study of Dr. Hong, a microbiologist accused of "bad" scientific practice by numerous secondary accounts of the 2003 SARS outbreak. Bringing Hong's own account of his own actions into dialogue with one of the most influential secondary accounts of his actions, the paper highlights the gross disparity between the two. Having argued that the rhetorical structuring of the secondary account is, ultimately, responsible for Hong's characterisation as a "bad" scientist, it then moves to explore how subsequent accounts developed their own characterisations. What becomes clear is that as secondary accounts began feeding off one another, references to Hong's account disappeared. Aided by the concepts of the "vanishing" and the "phantasm", the paper concludes with a consideration of how this process left Hong's work with a very peculiar form of existence.     

New Books: The Reunification of the University

Academic writing is something we all want our students to do well. The ability of our students to use writing in meaningful ways seems to lag far behind what we know they can do. The author introduces a technique to assist in teaching college academic writing. Writing for personal goals is contrasted with student academic writing. The integration of personal writing is used to demonstrate the developmental nature of writing and thinking in the progress of student learning in college so that these learners can understand more clearly and use more effectively their own thinking and writing capabilities.     

IDEALS AND METHODS OF RELIGIOUS EDUCATION FOR THE COMING WORLD ORDER∗

This article brings to bear on our understanding of learning many insights from the field of psychology

     

Externally Contingent and Unstable Self‐Worth as Predictors of Depression in College Women: A 3‐Month Study

Undergraduate women completed measures of externally contingent self‐worth, self‐esteem instability, and depression at the beginning (Time 1) and again 3 months later near the end (Time 2) of an academic semester. Findings indicated that when Time 1 depression scores were controlled for, each Time 1 facet of self‐esteem made significant contributions to Time 2 depression scores. Implications of these findings for the counseling of depressed college students are discussed.