Journal of Fluids Engineering: Recent submissions

Now showing items 3941-3960 of 9024

    • A Model for the Control of the Rat Estrous Cycle 

      Neena B. Schwartz (The American Society of Mechanical Engineers (ASME), 1969)
      This paper first reviews the basic elements of the reproduction system in female mammals and indicates the adaptive significance of the cyclicity of structure and function always observed in ...

    • Regulation and Control of the Thyroid-Pituitary System 

      K. Brown-Grant (The American Society of Mechanical Engineers (ASME), 1969)
      The thyroid-pituitary system of warm-blooded animals does appear to behave as an effective regulatory system in which the controlled variable is the level of free (unbound) thyroid hormone in ...

    • The Adrenal Glucocorticoid Endocrine System: Simulation of a Biological Controller 

      F. E. Yates (The American Society of Mechanical Engineers (ASME), 1969)
      Communication within biological systems involves either or both of two kinds of channels, each with a different kind of signal. The two types of signals are: (a) nerve impulse, or (b) hormones. ...

    • An Embodiment of Some Vertebrate Command and Control Principles 

      W. K. Kilmer; W. S. McCulloch; J. Blum (The American Society of Mechanical Engineers (ASME), 1969)
      Throughout the life of the vertebrates, the core of the central nervous system, the reticular formation, has retained the power to commit the whole animal to one mode of behavior rather than ...

    • The Organizing Principle of Complex Living Systems 

      A. S. Iberall; W. S. McCulloch (The American Society of Mechanical Engineers (ASME), 1969)
      A scheme is outlined for a useful way to think about the complex biological organism, man. It is based on physiological findings that the regulating and control functions in the system make ...

    • An Implantable Valveless Heart Assist Pump 

      M. C. Turner; W. S. Pierce; H. D. Metz; L. Goodman (The American Society of Mechanical Engineers (ASME), 1969)
      An intracorporeal left ventricular bypass, incorporating an electrically driven roller pump, has operated successfully in unrestrained calves for periods up to 11 days. A pneumatically powered ...

    • An Analytical Model for the Incompressible Flow in Short Vortex Chambers 

      D. N. Wormley (The American Society of Mechanical Engineers (ASME), 1969)
      A momentum integral analysis is presented for the incompressible, steady, axisymmetric flow in a short vortex chamber of the type commonly used in vortex valves. The analysis is developed with ...

    • Switching Analysis for Constrained Bilinear Distributed Parameter System With Applications 

      D. L. Briggs; C. N. Shen (The American Society of Mechanical Engineers (ASME), 1969)
      A distributed parameter thermal and stress model is developed for a nuclear rocket. The resultant equations for the optimal control problem are a pair of coupled, bilinear, partial differential ...

    • The Performance Characteristics of Geometrically Similar Bistable Amplifiers 

      T. Sarpkaya (The American Society of Mechanical Engineers (ASME), 1969)
      The results of a comprehensive study of the comparative performance characteristics of geometrically similar vented and unvented bistable amplifiers, together with their actual dimensions, are ...

    • Optimal State Variable Feedback With Bounded Gains 

      H. F. Millers; Y. Takahashi (The American Society of Mechanical Engineers (ASME), 1969)
      The optimization of bounded feedback gains with respect to an arbitrary integral performance criterion is performed using nonlinear programming. The gradient projection method has been applied to ...

    • Sensitivity in Multivariable Control Systems 

      W. F. Horton; C. T. Leondes (The American Society of Mechanical Engineers (ASME), 1969)
      Definitions of system sensitivity for linear single variable systems have been extended, in the past, to linear multivariable systems in the form of a sensitivity matrix. The role of the ...

    • Identification of Distributed Parameter Systems Using Finite Differences 

      P. L. Collins; H. C. Khatri (The American Society of Mechanical Engineers (ASME), 1969)
      A method is presented to identify partial differential equations and associated boundary conditions of a distributed parameter system. The method is applicable to linear, nonlinear, and time-varying ...

    • Optimization of a Certain Quality of Complete Controllability and Observability for Linear Dynamical Systems 

      C. D. Johnson (The American Society of Mechanical Engineers (ASME), 1969)
      The problem of assigning a physically meaningful measure of the “quality” of controllability and observability to dynamical systems which are completely controllable and/or completely observable ...

    • A Quasi Method of Characteristics With Application to Fluid Lines With Frequency Dependent Wall Shear and Heat Transfer 

      F. T. Brown (The American Society of Mechanical Engineers (ASME), 1969)
      The method of characteristics has been used in a variety of graphical, analytical, and numerical ways as a powerful tool in the solution of hyperbolic partial differential equations. The ...

    • Stochastic Testing Methods for Fluid Amplifiers 

      P. A. Orner (The American Society of Mechanical Engineers (ASME), 1969)

    • The Stability of a Second Order Linear Periodic System 

      E. J. Davison (The American Society of Mechanical Engineers (ASME), 1969)
      Necessary and sufficient conditions are obtained for the stability of the following second order linear system: ẋ = θ(t)x, θ(t) = θt+i=1lTi and θ(t) = A1, 0<t<T1 = A2, T1<t<T1+T2 ...

    • Control With a Multiplicative Mode 

      R. R. Mohler; R. E. Rink (The American Society of Mechanical Engineers (ASME), 1969)
      The merit of a multiplicative control mode is demonstrated by means of an optimal-control synthesis procedure that is applied to a bilinear regulator problem. Not only is the bilinear regulator ...

    • Invariant Imbedding and Sequential Interpolating Filters for Nonlinear Processes 

      H. H. Kagiwada; A. Schumitzky; R. Sridhar; R. E. Kalaba (The American Society of Mechanical Engineers (ASME), 1969)
      Suppose imprecise observations are made on imprecisely defined nonlinear processes, and one wishes to estimate the state of the process at certain fixed instants of time lying within the interval ...

    • An Efficient Computational Procedure for the Optimization of a Class of Distributed Parameter Systems 

      D. A. Wismer (The American Society of Mechanical Engineers (ASME), 1969)
      The optimal control problem for a broad class of distributed parameter systems defined by vector parabolic partial differential equations is considered. The problem is solved by discretizing the ...

    • A Multiplier Rule for a Functional Subject to Certain Integrodifferential Constraints 

      M. Wittler; C. N. Shen (The American Society of Mechanical Engineers (ASME), 1969)
      A problem in the optimal control of a nuclear rocket requires the minimization of a functional subject to an integral equation constraint and an integrodifferential inequality constraint. A ...