A theoretical and experimental study of the ionosphere using radio signals from earth satellites progress report no. 9, 1 jan. - 30 jun. 1964

Morphology of ionosphere using radio signals from earth satellite

Nonlinear Unsteady Motions and NOx Production in Gas Turbine Combustors

Chiefly for improved efficiency, the trend to increasing use of gas turbine engines in stationary powerplants has been firmly established. The requirement for minimum NOx production has motivated operation as close as practically possible near the lean flammability limit, to reduce flame temperatures and consequently reduce formation of nitrogen oxides via the Zeldovich thermal mechanism. However, experience has shown that under these conditions, stability of the chamber is compromised, often leading to the presence of sustained oscillations in the combustor. That possibility raises the problem of the influence of oscillatory motions on the production of nitrogen oxides. Numerically calculating these influences for a complex geometry gas turbine combustor is too computationally expensive at this ?me. Nonlinear analytical methods making use of these influences are a promising direction for simplei ways to design and develop operational gas turbine combustors. However, this analysis needs results on which to base unsteady models of the interaction between nonlinear oscillations and species production within a gas turbine combustor. In this paper, two methods are explored briefly as an initial step. The first is based on a configuration of perfectly stirred and plug flow reactors to approximate the flow in a combustion chamber. A complete representation of the chemical processes is accommodated, but the geometry is simplified. The second is a full numerical simulation for a realistic geometry, but at this stage the chemistry is simplified

Administrative Procedure in the Bureau of Land Management

Sweeping demands for reform in the procedure of federal agencies have characterized recent developments in administrative law. In 1955 it was the Hoover Commission and Task Force Reports on Legal Services and Procedures. This was followed by intensive activity in the American Bar Association, culminating in its proposed Administrative Practice Act, administrative code and other bills now before Congress. If these measures become law, federal administrative law will undergo considerable change. The pressure for general reform has tended to obscure the fact that a number of agencies are constantly reviewing their procedural rules in an effort to comply more fully with the letter and spirit of the Administrative Procedure Act of 1946. This may represent a belated recognition of the fact that the APA is, from their point of view, the lesser of two evils. Or, it may represent an honest effort to meet the criticism which various studies have pointed up. At any rate, reform is in the air. No attempt will be made here to evaluate the new proposals. The purpose of this Article is to direct attention to one agency which has revamped its procedure since 1946 with considerable success: the Bureau of Land Management of the Department of Interior. The discussion of Bureau procedure will be limited to mining claims and grazing applications

Science Notes - Understanding Science and Its Human Impact: A Public Symposium

A public symposium titled \u27\u27Understanding Science and Its Human Impact will be held from 9 a. m. to 4 p. m. on May 5, 1990, at Des Moines Area Community College, Ankeny, Iowa. Designed primarily for the general public and teachers of science and other subjects, especially humanistic disciplines, the symposium is a sequel to the workshop The Nature of Science and Science Teaching held at Grinnell in November 1988. This five-session symposium is sponsored by the Iowa Committee of Correspondence and co-sponsored by the Iowa Academy of Science, Iowa State Education Association, Iowa Department of Education, Central and Waldorf Colleges, Drake University and AEAs 12 and 15

Insights from Industry Leaders: A Maturity Model for Strengthening Communication Measurement and Evaluation

Much scholarship has been devoted to identifying barriers that prevent the advancement of communication measurement and evaluation. This research focuses on the characteristics, objectives, and practices of chief communication officers (CCOs) with successful measurement and evaluation programs. Three key dimensions of practice emerged from in-depth interviews: communication executives’ measurement practices and evaluation programs were used to adjust communication strategies; were aligned with other business units; and were integrated with business priority plans. Interviewees also focused on the ability of communication measurement practices and evaluation programs to provide insights for executives, to align communication with the work of other business units, and to connect the organization with the outside environment and stakeholders. This study extends strategic communication scholarship by discussing how overcoming barriers and advancing measurement and evaluation work relates to roles adopted by organizational leaders. This article also offers a preliminary, scalable maturity model that aids in the development, formalization, and optimization of strategic communication measurement and evaluation. This study demonstrates the capacity for communication evaluation to overcome perceived barriers, realize appropriate stature with organizations, and grow communication functions accordingly

PROFIT CONSISTENCY AND MANAGEMENT CHARACTERISTICS FOR SUCCESSFUL NORTH DAKOTA FARMS, 1995-2000

Farm profitability varies widely among producers, but the reasons for those differences are not clear as it is generally not known if the same farms are in the higher profit categories every year. Characteristics of the individual producer also vary substantially. Farm size, crop yields, cost of production, debt structure, and land ownership are some of the traits which differ among farms. This study analyzed farm finance data from the North Dakota Farm and Ranch Business Management Program over the years 1996-2000 to determine if the characteristics of profitable farms were different from the characteristics of farms which were not as profitable. A secondary objective was to evaluate if farms remained in similar profit quartiles every year.North Dakota Farm and Ranch Business Management Program, farm characteristics, return on assets, costs, land ownership, debt structure, Farm Management,