A 10 channel transmitter and receiver DWDM photonic integrated circuit pair is demonstrated, that is capable of transmitting and receiving data at 40 Gbit/s per channel for an aggregate data ...communication rate of 400 Gbit/s.
Linus Pauling: Reflections Pauling, Linus; Kauffman, George B.; Kauffman, Laurie M.
American scientist,
11/1994, Letnik:
82, Številka:
6
Journal Article
In an interview, Nobel Prize winner Linus Pauling discusses his research in chemistry. His most significant achievement was the realization that a molecule can be described by an intermediate ...structure that is a resonance combination of other structures.
Neither general education nor special education now offers appropriate and therapeutic treatment to all children and youth with emotional or behavioral disorders. Substantial improvements are needed ...in both general and special education, but the needed changes may not be those suggested by many proponents of school reform. Some suggested reforms are tenuously connected to reality in ways that suggest comedie intent or thought disorder, yet audiences typically respond as if these suggestions were both serious and rational. The disorder of school reform may be as much a problem of inappropriate audience response as it is a matter of nonsensical suggestions. One possible response to serious but highly questionable suggestions for reform is articulation of postulates on which a comprehensive educational service delivery system might be based. I present eight such postulates and correlates.
Both the spleen and thymus of man contain a population of cells which can suppress the mixed lymphocyte reaction. Splenic cells suppress the MLC 58 +/- 4.8 percent, and the thymus is able to suppress ...the MLC 90 +/- 2.6 percent. However, splenic cells require stimulation by vegetable mitogens before suppressor activity can be observed, and the thymus displays spontaneous suppressor activity without prior stimulation. The suppressor effect is linearly related to the log of the cell dose (r = 0.8, p less than 0.01), and at low doses the suppressor cells stimulate rather than inhibit the MLC. The cells are exquisitely sensitive to immunosuppressive drugs, and blood levels encountered in clinical organ transplantation abrogate their suppressive activity. The suppressive activity of the cells is nonspecific, and they are able to inhibit the MLC between individuals totally unrelated to the spleen or thymus donor. Since these cells likely play a role in the development of tolerance, further characterization of their properties is required.
A review of a collection of 146 cartoons spanning 25 years of work. Science teachers will find artifacts that add humor to courses/ handouts/ bulletin boards and the like.
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