The Lower Mississippi River and the Coriolis Force
Weather patterns and large bodies of water respond to the forces generated by the earth's rotation. A large north-south flowing river, such as the Lower Mississippi River,...

Update: Ozark-Webbers Falls Turbines
The Ozark and Webbers Falls powerhouses were designed and constructed under the supervision of the U.S. Army Corps of Engineers. Both are located on the McClellan-Kerr Arkansas River Navigation...

Digital Data Acquisition and Performance Testing of Hydroelectric Equipment
The U.S. Army Corps of Engineers Hydroelectric Design Center has elected to use digital data acquisition methods when conducting performance tests of hydroelectric units. Transducers have...

Early Detection of Rotor Cracks—Monitoring & Methodology
This paper describes a diagnostic method for the early detection of shaft cracks on rotating machines. The method is based on interpretation of the lateral synchronous (1x) and twice per...

Variable Speed Generators in Hydro Applications
This paper discusses the investigation of the doubly-fed variable speed machine as a potential candidate to convert a varying input speed to a constant frequency, constant voltage output....

Sprinkler and Subirrigation Research Park for Multiple Cropping Research
A research park has been developed to enable scientists to evaluate sprinkler and subsurface irrigation management strategies for multiple cropping rotations. Various sprinkler irrigation...

Space Artificial Gravity Facilities: An Approach to Their Construction
In the course of adaptation to a space microgravity environment, humans experience cardiovascular deconditioning, loss of muscle mass, and loss of bone minerals. One possible solution...

Solutions to Space Station Designs
Any space station that is to be designed for extended human use may require gravity. The artificial gravity field required can be produced by rotating the structure. As the Soviets have...

Making Use of Contaminated Soils
Using hot-mix asphalt (HMA) is one answer to contaminated soil. HMA plants can be modified to accept some contaminated soil—a boon not only to the generator of the soil but the asphalt...

Irrigation Water Management with Rotation Scheduling Policies
Rotation schedules are delivery-system oriented and represent relatively low capitol investment in system components and system management, but are not usually responsive enough to crop...

Arranged Delivery Schedules
The method of delivery of irrigation water to farmers from irrigation districts vary considerably from one project to another. Rotation delivery systems usually place too many restrictions...

Moment Rotation Curves for Double Framing Angles
Moment-rotation curves for bolted framed steel connections are derived from force-deflection data obtained from laboratory tension and compression tests of angle segments. These derived...

Elasticity and Plasticity of Concrete under Principal Stress Rotation

Experiment on Stability of an Impulsively Started Rotating Flow

Classification and Behavior of Meander Migration
Meander migrations on the Mississippi River between Cairo, Illinois and Baton Rouge, Louisiana for the time period between the years 1765 and 1930 were classified into six categories based...

Synopsis: Ozark-Webbers Falls Turbine Repairs
The Ozark and Webbers Falls powerhouses were designed and constructed under the supervision of the U. S. Army Corps of Engineers and are located on the McClellan-Kerr Arkansas River Navigation...

A Modified RBC Design: Performance Evaluation
An RBC (rotating biological contactor) system was designed using Pall rings type 40, and tested under high organic surface conditions. Influent soluble BOD averaged at 55 mg/l, equivalent...

Continuum Modeling of Discrete Structures with Geometric Nonlinearities
The modeling of geometrically non-linear discrete structures by an equivalent continuum is presented. The discrete-continuum analogy is developed by first isolating a unit cell of the...

Seismically Induced Fluid Forces on Elevated Tanks
Seismically induced fluid forces on elevated liquid storage tanks and their supporting systems are evaluated. X-braced as well as pedestal towers are analyzed. The interaction between...

Nonlinear Behavior of Ductile Iron Pipeline Joints
Experiments were performed on 4 in. (100 mm), 6 in. (150 mm), 8 in. (200 mm), and 10 in. (250 mm) pipelines with rubber gasket joints to determine their structural and stiffness characteristics...

 

 

 

 

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