EVALUATION OF CURRENT SOIL CONSERVATION STRATEGIES

The paper is divided into four broad selections. The first section spells out the major reasons for public action in regard to soil conservation. The second section briefly discusses the current soil conservation investments both public and private. The third section evaluates the current strategies, ranging from cost-sharing to regulation, in terms of economic, political, and administration effectiveness. Finally, the concluding section suggest what we have learned from the evaluation and what needs to be done so that future evaluations will have a firmer analytic basis.Land Economics/Use,

High temperature thrust chamber for spacecraft

A high temperature thrust chamber for spacecraft (20) is provided herein. The high temperature thrust chamber comprises a hollow body member (12) having an outer surface and an internal surface (16) defining the high temperature chamber (10). The body member (12) is made substantially of rhenium. An alloy (18) consisting of iridium and at least alloying metal selected of the group consisting of rhodium, platinum and palladium is deposited on at least a portion of the internal surface (16) of the body member (12). The iridium and the alloying metal are electrodeposited onto the body member (12). A HIP cycle is performed upon the body member (12) to cause the coating of iridium and the alloying metal to form the alloy (18) which protects the body member (12) from oxidation

Proposed Limitation of Inpatient Rehabilitation for Medicare Beneficiaries: Delivery System Implications of the 75% Rule

No abstract available

Proceedings of the 23rd annual Central Plains irrigation conference

Presented at Proceedings of the 23rd annual Central Plains irrigation conference held in Burlington, Colorado on February 22-23, 2011

Proceedings of the 21st annual Central Plains irrigation conference, Colby Kansas, February 24-25, 2009

Presented at the 21st annual Central Plains irrigation conference on February 24-25, 2009 in Colby, Kansas

Reducing the cost of pumping irrigation water

Irrigation accounts for a large portion of the energy used in Nebraska agriculture. The cost to pump irrigation water depends on the type of energy used to power the pumping unit. This document describes a method to estimate the cost of pumping water and to compare the amount of energy used to that for a well maintained and designed pumping plant. The results can help determine the feasibility of repairing the pumping plant

Pumping Plant Performance

Irrigation accounts for a large portion of the energy used in Nebraska agriculture. This paper describes a method to estimate the cost of pumping water and compares the amount of energy used by a properly designed and well-maintained pumping plant, represented by the Nebraska Pumping Plant Performance Criteria (NPPPC). The results can help determine the feasibility of repairing the pumping plant. Methods to compare energy sources are also presented. We recommend that you periodically arrange with a well drilling company to test the efficiency of your pump. Worksheets for pumping plant performance are included in the appendix

Techniques to improve maneuver stability characteristics of a nonlinear wide-body transport airplane in cruise flight

The maneuver control stability characteristics of an aircraft are a flying qualities parameter of critical importance, to ensure structural protection as well as adequate predictability to the pilot. Currently, however, maneuver stability characteristics are not uniquely addressed in the Federal Aviation Regulations (FAR) Part 25, for transport aircraft. In past transport category certification programs, the Federal Aviation Administration (FAA) has used a combination of requirements (longitudinal control, vibration and buffeting, high-speed characteristics, and out-of-trim characteristics) to ensure safe and controllable maneuver stability characteristics over a range of flight conditions and airplane configurations. Controversies exist regarding each of these regulations, however, and considerable expenditures in terms of design studies and testing time have resulted from the requirements. It is also recognized that additional engineering guidance is needed for identifying acceptable nonlinear maneuver stability characteristics, particularly as they relate to relaxed stability, highly augmented transport configurations. The current trend in large aircraft design is toward relaxed, or even negative, static margins for improved fuel efficiency. The advanced flight control systems developed for these aircraft, in many instances, have rendered current aforementioned maneuver stability criteria either too stringent or of little practical use. Current design requirements do not account for these advanced designs. The objective was to evaluate a broad spectrum of linear and nonlinear longitudinal stability characteristics to generate data for defining satisfactory and unacceptable maneuver characteristics, as defined by pilot opinion. Primary emphasis was placed on two techniques of varying column force per normal acceleration. This study was a joint venture with four pilots participating; one from NASA, one from the FAA, and two from industry

Di- and triheteronuclear metal cluster anions containing transition metals

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/24896/1/0000323.pd