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Biomedical subjects

J Jeffers

Publications and source records attributed to J Jeffers.

11 recordsLinked to original sources

Reversible soliton motion.

We show that spatial solitons on either phase- or amplitude-modulated backgrounds can change their direction of motion according to the modulation frequency. A soliton may, therefore, move up or down phase gradients or remain motionless regardless of where it is in relation to the background modulation. The general theory is in good agreement with numerical results in a variety of nonlinear systems.

Journal Article↗

Master equation for retrodiction of quantum communication signals.

We derive the master equation that governs the evolution of the measured state backwards in time in an open system. This allows us to determine probabilities for a given set of preparation events from the results of subsequent measurements, which has particular relevance to quantum communication.

Journal Article↗

Structure of the galactokinase gene of Escherichia coli, the last (?) gene of the gal operon.

We present the nucleotide sequence of the galactokinase gene (galK) of Escherichia coli including its 5' and 3' flanking regions. This DNA sequence derives from the lambda gal8 transducing phage and is identical to the sequence present in the galK gene fusion vectors, pKO and pKG, commonly used to study transcriptional regulatory elements. We define the precise 3' junction between the bacterial and phage sequences in lambda gal8 and demonstrate that this junction probably results from a homologous recombination event between identical 9 bp sequences common to the gal operon and phage lambda. Moreover, we examine the 300 bp region located immediately beyond galK for transcription termination function and find no gal operon terminator. Lastly, we compare the galK genes of E. coli and the yeast S. cerevisiae and find several regions of strong homology among which is a potential ATP-binding site homology shared by a variety of ATP-binding proteins including protein kinases encoded by mammalian oncogenes.

Adenosine Triphosphate↗

Some necessary assumptions in private psychiatric treatment centers: the functions and dysfunctions of myths.

The functions and dysfunctions of myths in private psychiatric inpatient treatment are examined. Myths are here defined as beliefs given uncritical analysis by members of a group in support of traditional practices and institutions. Myths give inspiration to the ongoing work of the psychiatric center, and without them the work could not successfully proceed. The following myths are examined: the Myth of the Higher Order, the Myth of Uniqueness and Superiority, the Myth of Omnipotence, the Myth of the Psychotic Patient and the Healthy Staff, and the Myth of the Family. Myths provide the comforting language of absolutes, but may become anachronistic and proven false by reality. They will then no longer drive away chaos, and individuals will feel betrayed.

Adolescent↗