Thirst is a subjective sensation, triggered by a lack of water and accompanied by the desire to drink. As a powerful and compelling sensation, it is perhaps only exceeded by the hunger for air and by pain, and is central to any concern with the overall mechanisms of homeostasis. Drinking is essential to the survival of most terrestrial vertebrates, and provides a useful model system with which to analyse the control of a complex type of behaviour. Furthermore, drinking requires integrated behavioural responses to physiological stimuli and environmental demands, and therefore offers a good example for the analysis of the biological mechanisms underlying behaviour. First published in 1982, this book describes the control of thirst and water intake, and the physiology and psychology of drinking. Although this book is intended primarily for students of psychology, physiology and medicine, it should be of interest to all those concerned with the scientific study of thirst and with the physiological and neural bases of behaviour.

Prinzip unserer Therapie bei Mehrfachverletzungen mu - bezogen auf den Wasser-Elektrolyt- Haushalt - sein, den Erhaltungs-und Funktionsstoffwechsel zu sichem bzw. wieder herzustel- len. Die korpereigenen Kompensationsmechanismen konnen vom Organismus nur zeitlich limi- tiert aufrech t erhal ten werden; eine friihzeitige und ausreichende Volumensubsti tu tion en tspre- chend den hiiufig sehr hohen Verlusten ist daher entscheidend. Nur so konnen irreversible Or- ganschiiden, die unabhiingig von der primiiren Verletzung den weiteren Verlauf des Schockge- schehens bestimmen, vermieden werden. Literatur 1. Ahnefeld, F . W., Burri, C., Kilian, J.: Schock und Schockbehandlung. Chimrg 47, 157 (1976) 2. Allgower, M.: Der traumatisch-hamorrhagische Schock. Chimrg 45,103 (1974) 3. Berman, I. R., Iliescu, H., Ranson, J. H. C., Eng, K.: Pulmoaruy capillary permeability - a transfusion lesion. J. Trauma 16,471 (1976) 4. Davis, J . 0.: What signals the kidney to release renin? Circulation Res. 28,3011 (1971) 5. Eigler, J., Held, E.: Mikrozirkulation in der Niere. In: Mikrozirkulation. Ahnefeld, F. W., Burri, C., Dick, W., Halmagyi, M. (Hrsg), p. 102, Schriftenreihe Klin. Anasthesie und Intensivtherapie, Bd. 5, Berlin, Heidelberg, New York: Springer 1974 6. Ganzoni, A. M.: Fortschritte der Transfusionsmedizin. ArztI. Praxis 28, 3115 (1976) 7. Ganzoni, A. M., Reuff, U., Stampe, D., Koerner, K., Kilian, J.: Mikroaggregate im gelagerten Blut. Ver- und buffycoatfreiem Erythrozytenkonzentrat. Anaesthesist gleichende Untersuchungen an Vollblut 27, 115 (1978) 8. Jarhult, J.: Osmotic fluid transfer from tissue to blood during hemorrhagic hypotension. Acta physiol. scand.

A Pulse Detonation Engine (PDE) combusts fuel air mixtures through a form of combustion: detonation. The resulting change in momentum produces thrust. Recent PDE research has focused on designing working subsystems. This investigation continued this trend by examining ignition system alternatives. Existing designs required spark plugs in each separate thrust tube to ignite premixed reactants. A single thrust tube could require the spark plug to fire hundreds of times per second for long durations. The goal was to minimize complexity and increase reliability by limiting the number of ignition sources. This research examined using a continuously propagating detonation wave as both a thrust mechanism and an ignition system requiring only one initial ignition source. This investigation was a proof of concept for such an ignition system. First a systematic look at single tube geometric effects on detonations was made. These results were used to further examine configurations for splitting detonations, physically dividing one detonation wave into two separate detonation waves. With this knowledge a dual thrust tube system was built and tested proving that a single spark could be used to initiate detonation in separate thrust tubes. Finally, a new tripping device for better deflagration to detonation transition (DDT) was examined. Existing devices induced DDT axially. The new device attempted to reflect an incoming detonation to initiate direct DDT in a cross flow.

Invisible Warrior is a memoir. It is a valuable historical account of my growing up in New York. An insider's look into a housing project experiment, which yielded mostly failure. It is also an inspiring narrative that demonstrates success is possible even under harsh conditions. Escaping with two small children, an early pregnancy and thirty-five cents, we proved life's possibilities and its glimmer of an indistinguishable light at the end of a dark tunnel.