Geotechnical and structural behavior of the railroad track in large-scale apparatus

This paper analyses the static and dynamic behavior of the railroad track model in laboratory. Measurements of stresses and strains on a large-scale railroad track apparatus were studied. The model includes: compacted soil, representing the final layers of platform, ballast layer, and ties (steel, wooden, and pre-stressed concrete). The soil and soil ballast interface were instrumented with pneumatic stress gauge. Settlement measurement device were positioned at the same levels as the load cells. Loads were applied by hydraulic actuators, statically and dynamically. After the prescribed number of load cycles, in pre-determined intervals, stresses and strains were measured. Observations indicate that stress and strain distributions, transmitted by wooden or steel ties, behave similarly. A more favorable behavior was observed with pre-stressed concrete mono block ties. Non-linear response was observed after a threshold numbers of cycles were surpassed, showing that the strain modulus increases with the numbers of cycles. © 2009 IOS Press.

The public corporation: an adequate instrument for the supply of electric power

Includes bibliography

Note on Eighth Annual Meeting Board of Governors Caribbean Investment Corporation (CIC)

Nota sobre la Octava Reunion Anual de la Junta de Gobernadores de la Corporacion de Inversiones del Caribe (Caribbean Investment Corporation, CIC) realizada en Sta. Lucia, el 14 de mayo de 1982. Durante la reunion las discusiones se centraron fundamentalmente sobre el futuro de la CIC.

Note on Caribbean Investment Corporation Fourth Annual Meeting of the Board of Governors, Guyana, 28 April 1978

Nota sobre la Cuarta Reunion Anual de la Junta de Gobernadores de la CIC (Caribbean Investment Corporation). En ella se analizan los antecedentes de la CIC, las conclusiones de la reunion anterior, y algunos pormenores de la presente reunion.

Measurement, Simulation, and Analysis of the Mechanical Response of Railroad Track

Increased railroad traffic volumes, speeds, and axle loads have created a need to better measure track quality. Previous research has indicated that the vertical track deflection provides a meaningful indicator of track integrity. The measured deflection can be related to the bending stresses in the rail as well as characterize the mechanical response of the track. This investigation summarizes the simulation, analysis and development of a measurement system at the University of Nebraska (UNL) to measure vertical track deflection in real-time from a car moving at revenue speeds. The UNL system operates continuously over long distances and in revenue service. Using a camera and two line lasers, the system establishes three points of the rail shape beneath the loaded wheels and over a distance of 10 ft. The resulting rail shape can then be related to the actual bending stress in the rail and estimate the track support through beam theory. Finite element simulations are used to characterize the track response as related to the UNL measurement system. The results of field tests using bondable resistance strain gages illustrate the system’s capability of approximating the actual rail bending stresses under load.

RP96-11 The Farm Corporation: What It Is, How It Works, How It Is Taxed

A corporation is an artificial person that is created and operated according to state corporation statutes. It is a separate taxpayer subject to specific and detailed federal, state, and local tax laws. The advice and service of your lawyer are indispensable in organizing and operating a farm corporation. There are three basic forms of farm business organization, the sole proprietorship, the partnership, and the corporation. Variations of these forms have resulted in the limited partnership and the "tax option" corporation. These three basic forms are discussed in this research publication.