The Role of PGE2 and its Corresponding Receptors (Ep1-4) in Oesophageal Carcinogenesis: Novel Therapeutics for Chemoprevention and/or Intervention

Abstract

When a dynamic system is isolated from its environment it may become reverberant and inhibit the effectiveness of the isolation. The transition from a non-reverberant to a reverberant situation introduced by isolation is considered in this paper. An example is cited dealing with the escaping power from a one-dimensional dynamic system to its environment. Consideration is focused on an attempt to reduce the escaping power by isolating the dynamic system from its environment. It is argued that such an isolation may not perform as expected. It is shown that to render the isolation effective, damping may be used. This is true even if prior to isolation the application of damping was futile in reducing the escaping power. Damping and isolation are thus found to be supplemental. A prescription for converting the formalism to a three-dimensional dynamic system (an enclosure) is proposed and developed. The use of coating as a means for providing isolation for an immersed enclosure is discussed. © 1981 Academic Press Inc. (London) Limited.