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In-situ determination of strength parameters of marine soils

Description: Principles are developed whereby both the sear strength, S, and the effective soil strength angle, phi', can be calculated from the readings of a combined shear/normal-stress gauge mounted on the face of a rough penetrator. The method calculates S and phi' even if interface friction is the mechanism of failure, unless that friction is local to the gauge face. In that case, the method yields only the interface friction angle, delta.
Date: January 1, 1980
Creator: McNeill, R. L. & Green, S. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Numerical modeling of atoll reef harbors

Description: The effect of the shape of a harbor cut through a reef on mitigating waves from the deep ocean was studied using a shallow water, nonlinear, long wave code called SWAN. A significant amount of the wave energy is dissipated over the reef regardless of the design of the harbor. The reef resulted in decreasing the wave height by a factor 3. The wave height at the shore can be further decreased by another factor of 2 by a ''V'' shaped or parabolic bottom design.
Date: January 1, 1986
Creator: Mader, C.L.; Vitousek, M. & Lukas, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Optimized design and predicted performance of a deep ocean 50 m piston coring system

Description: Calculational techniques are described which were developed or adapted for the purpose of analyzing the mechanical response of a proposed piston coring system capable of recovering high quality 50 m long cores. The analysis includes the effects of barrel geometry on the mass required to penetrate 50 m of an assumed sediment, the effects of non-vertical entry and pullout on the stresses within the barrel, and the effects of steel cable or parachute piston restraints on the resulting core sample … more
Date: January 1, 1980
Creator: Karnes, C. H.; Burchett, S. N. & Dzwilewski, P. T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Dysbaric gas bubble disease in dogs. IV. Acclimatization to diving

Description: Acclimatization to diving was documented to occur in dogs. An increase in the number of repetitive dives which could be tolerated, as well as a decrease in the total number of pulmonary artery venous gas emboli resulting from individual dives were observed. The results from the experimental subject ''Jason'' indicate that acclimatization involves a reduction in the number of bubbles, and not an increase in the ability of the body to tolerate bubbles. Acclimatization is principally a physical ra… more
Date: January 1, 1986
Creator: Kunkle, T. D.; Morita, A. & Beckman, E. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Preliminary design for Ocean Thermal Energy Conversion (OTEC) Stationkeeping Subsystem (SKSS). Task IV. Development and testing recommendations

Description: The preliminary designs of Stationkeeping Subsystems (SKSS) for the OTEC Modular Experiment Plant are being prepared for a barge and spar platform. The SKSS selected by NOAA for the barge is a multiple anchor leg mooring with active tensioning (MAL), while that for the spar is a tension anchor leg (TAL) moor. The development and testing program required to provide design data and to validate performance predictions is described. Basic assumptions are made with regard to site characteristics, be… more
Date: November 9, 1979
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Evaluation of physical characteristics and phenomena, sensitivity and interaction effects, performance criteria and output requirements for a station keeping subsystem engineering evaluation tool (SKEET)

Description: The fundamental purpose for SKEET is to provide a means of simulating and evaluating OTEC platform SKSS performance. This evaluation capability may be employed in the process of a design review, comparison of alternative concepts, operational planning, establishing risk and reliability criteria and a host of other applications. However, the central requirement is that SKEET have the capability to predict the excursions on motions of the platform and loads on the SKSS as a result of environmenta… more
Date: December 1, 1979
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Preliminary designs for OTEC Stationkeeping Subsystems (SKSS). Summary report

Description: This summary report presents a condensation of the designs as developed from requirements and concept selection to preliminary design. The study consists of the following six tasks: (1) Design requirements: establish design environmental conditions and criteria. Develop methodology to both assess SKSS reliability and performance, and minimize life cycle costs. (2) Conceptual design: develop at least two SKSS conceptual designs for both barge and spar platform (eight in all). Consider commercial… more
Date: February 15, 1979
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Modular OTEC platforms, SKSS designs. Volume I. Executive summary. Final report

Description: One of the possible options for generating electrical energy from ocean thermal gradients requires the use of a floating offshore platform. The platform would contain all OTEC (Ocean Thermal Energy Conversion) systems and power cycle components and consist of the hull, seawater, station-keeping, platform service, and mission support subsystems. It would be stationed at one of the designated OTEC sites, and would transmit the generated electricity to the shore power networks by means of an elect… more
Date: February 29, 1980
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Conceptual designs for modular OTEC SKSS. Final report

Description: This volume presents the results of the first phase of the Station Keeping Subsystem (SKSS) design study for 40 MW/sub e/ capacity Modular Experiment OTEC Platforms. The objectives of the study were: (1) establishment of basic design requirements; (2) verification of technical feasibility of SKSS designs; (3) identification of merits and demerits; (4) estimates of sizes for major components; (5) estimates of life cycle costs; (6) deployment scenarios and time/cost/risk assessments; (7) maintena… more
Date: February 29, 1980
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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OTEC platform configuration and integration. Executive summary. Final report

Description: A brief but comprehensive summary of a conceptual design for an OTEC platform is presented. In the first phase studies, an evaluation methodology was developed for analyzing the ocean system requirements against site criteria and a final evaluation of integrated OTEC commercial platform candidates was performed. A ranking of candidate platforms was obtained as the end result. For Phase-II studies, M. Rosenblatt and Son, Inc. project team was given the SPAR and SPHERE platforms to perform not on… more
Date: July 26, 1978
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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OTEC SKSS preliminary designs. Volume IV. Appendixes. Final report

Description: This volume contains appendices to the Station Keeping Subsystem design study for the 40 MeW Modular Experiment OTEC platforms. Appendices presented include: detailed drag calculations; sample CALMS computer printouts for SPAR and BARGE static analyses; sample time domain computer printouts (Hydromechanics, Inc.) program; extreme value and fatigue load calculations; anchor design calculations; deployment calculations; bottom slope plots; time domain analysis report by Hydromechanics Inc.; detai… more
Date: February 29, 1980
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Water as a thermoacoustic working fluid

Description: This short report, addressed only to the thermoacoustic cognoscenti, discusses thermodynamic and transport properties of water with emphasis on water's virtues as a thermoacoustic working fluid. Short-stack-approximation calculations are presented, showing that water is a good working fluid. A very rough design for a sound source using water is also presented as a starting point for discussing the merits and difficulties of this technology. 4 figs.
Date: January 1, 1988
Creator: Swift, G.W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Preliminary designs for modular OTEC platform station-keeping subsystems. Final report. MR and S Report No. 6042-6

Description: This volume of the report presents the results of the third through the sixth tasks of the Station Keeping Subsystem (SKSS) design studies for 10/40 MW/sub e/ capacity OTEC Modular Experiment platforms (MEP). Tasks 3 through 6 are: (3) complete preliminary designs for one SKSS for each of the two platforms (SPAR and BARGE); (4) development and testing recommendations for the MEP SKSS; (5) cost-time analysis; and (6) commercial plant recommendations. The overall conclusions and recommendations f… more
Date: February 29, 1980
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Definition of the requirements of a station keeping subsystem (SKSS) engineering evaluation tool (SKEET). Final report

Description: A study of the requirements of an OTEC Station Keeping Subsystem (SKSS) Engineering Evaluation TOOL (SKEET) has been completed by Hoffman Maritime Consultants Inc. SKEET is intended to provide a basis for quantitative comparison and assessment of candidate SKSS performance based on realistic predictions of expected loads, motions and displacements obtained by modeling all significant environmental and operational factors. The objectives of the study are: to define the required elements of a SKE… more
Date: December 1, 1979
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Industrial Market Research Report: Feasibility of commercialization of the advanced antifouling coating of Copperlok, Inc

Description: The Copperlok antifouling process was designed to prevent marine growth on surfaces exposed to sea water. It is a method of bonding thermally sprayed Cu and Cu alloys onto an epoxy material containing microballoons (hollow spheres). After the epoxy cures, the surface is abraded so that the microballoons are fractured, exposing microscopic concave porosity. The sprayed material is directed to the surface, where it impregnates the pores, bridges and then welds across the surface, creating a very … more
Date: October 1, 1990
Creator: Gormley, G.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Hydrodynamic design loads for the OTEC cold water pipe

Description: Ocean current and/or plant motion crossflows induce time dependent hydrodynamic loads on the OTEC cold water pipe due to vortex shedding. Design criteria were established for mean and fluctuating loads based on a review of the literature, analysis of test data acquired by SAI under a previous experimental program and an analytical extension of test results to higher Reynolds number. Baseline loads were specified for rigid cylinders in uniform flows. Modifications to the loads by current shear, … more
Date: September 1, 1978
Creator: Hove, D.; Shih, W. & Albano, E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

OTEC platform configuration and integration study. Final report

Description: Conceptual designs of ship-type and spar-type platforms for Ocean Thermal Energy Conversion (OTEC) commercial plants are presented. Comparative evaluation of six candidate platform types is made. Design guidelines for sea water, cold water pipe and position control systems are developed. Costs are presented for plants with outputs of 400 MWe (Net) for operational sites of New Orleans, Hawaii, and Brazil.
Date: April 1, 1978
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Preliminary designs for ocean thermal energy conversion (OTEC) stationkeeping subsystems (SKSS). Task II. Conceptual design. Final report

Description: The study is presented in five sections: design loads, conceptual designs, trade studies, cost analysis and concept evaluation and ranking. Extensive appendixes provide back up calculations and data to support the results. Environmental forces and yaw moments acting on the barge and spar in the various design sea states are presented including wave, wind and current effects. A parametric analysis illustrates the impact on holding power requirement of varying the return periods for operational a… more
Date: July 27, 1979
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Preliminary design report for OTEC stationkeeping subsystems (SKSS)

Description: Lockheed Ocean Systems with IMODCO prepared these preliminary designs for OTEC Stationkeeping Subsystems (SKSS) under contract to NOAA in support of the Department of Energy OTEC program. The results of Tasks III, V, and VI are presented in this design report. The report consists of five sections: introduction, preliminary designs for the multiple anchor leg (MAL) and tension anchor leg (TAL), costs and schedule, and conclusions. Extensive appendixes provide detailed descriptions of design meth… more
Date: December 12, 1979
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Antifouling marine concrete

Description: Various toxic agents were evaluated as the their capability to prevent or inhibit the attachment of marine fouling organisms to concrete. Creosote and bis-(tri-n-butyltin) oxide (TBTO) were impregnated into porous aggregate which was used in making concrete. Cuprous oxide, triphenyltin hydroxide (TPTH), and 2-2-bis-(p-methoxyphenyl)-1,1,1-trichloroethane (methoxychlor) were used as dry additives. Two proprietary formulations were applied as coatings on untreated concrete. Test specimens were ex… more
Date: July 1, 1980
Creator: Vind, H P & Mathews, C W
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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OTEC platform configuration and integration. Volume III. Project Plan. Final report

Description: The Spar and Sphere offshore platforms are feasible concepts for the demonstration of a near full size OTEC plant to determine its validity and to gather data for use in the construction, design and operation of commercial OTEC plants. A hull size suitable to support a 100 MWe net output plant was chosen. Either 50, 25 or 12.5 MWe power modules could be used. Selection of 50 MWe modules would permit the testing of equipment recommended for the commercial plant. The use of 25 MWe modules would p… more
Date: July 7, 1978
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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OTEC platform configuration and integration. Volume II. Technical concept. Final report

Description: The configuration, integration, and evaluation studies performed in the first phase of this contract resulted in a ranking of the most feasible platform candidates for commercial OTEC applications. On the basis of the results obtained from three individual contractors performing the same study, the Department of Energy made selections of two platform hulls for each contractor for conceptual designs. For Phase-II studies, M. Rosenblatt and Son, Inc. (MR and S) project team was given the SPAR and… more
Date: July 7, 1978
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Design of a high power density, permanent magnet, axial gap dc motor

Description: In the design of drive motors for undersea vehicles, the premium placed on noise suppression suggests the use of a brush-commutated dc motor. The additional constraints of weight and volume, as well as unusual configuration, presents the axial air-gap configuration, with a permanent magnet field, as a viable candidate. In such a configuration the design of the brushes and commutator and the resulting structure becomes critical. The report describes a novel solution to this problem. The basic mo… more
Date: January 1, 1990
Creator: Hawsey, R. A.; Daniel, D. S.; Thomas, R. J. (Oak Ridge National Lab., TN (USA)) & Bailey, J. M. (Tennessee Univ., Knoxville, TN (USA))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Production and properties of perrhenate-doped alkali halide crystals

Description: The growth and selected properties of single crystals of KCl doped with ReO/sub 4//minus// is described. The crystals have been used as saturable absorbers to modulate and control CO/sub 2/ laser radiation. ReO/sub 4//minus// ion concentrations in excess of 10/sup 17/ cm/sup /minus/3/ were achieved in KCl with good optical quality. The room temperature absorption of the ReO/sub 4//minus// ion in KCl was centered at 936.8 cm/sup /minus/1/ with 1.5 cm/sup (minus/1/ linewidth and with absorption c… more
Date: January 1, 1987
Creator: Nestor, O.H. & Figueira, J.F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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