1,247 research outputs found

    Structure and Emplacement of Cretaceous Plutons in Northwest Yosemite National Park, California

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    The ~103-98 Ma Yosemite Valley Intrusive Suite, younger Granodiorite North of Tuolumne Peak, and ~97 Ma Yosemite Creek Granodiorite intrude plutonic and metasedimentary host rocks of the central Sierra Nevada batholith. Precambrian to Cambrian metasedimentary rocks separate the Yosemite Valley Intrusive Suite from the younger (94-85 Ma) Tuolumne Intrusive Suite and are interpreted to represent the original extent of the older suite. The Mt. Hoffman granodiorite and Taft Granite of the Yosemite Valley Intrusive Suite record evidence of the development of magma chambers, whereas the Tuolumne Peak and Yosemite Creek granodiorites were likely constructed via several small increments, and a sizable magma chamber did not form. Accommodation of magma was probably facilitated by a combination of processes, but there is only direct evidence for minor stoping. The dominant northwest-striking magmatic foliation in the Mt. Hoffman granodiorite records regional northeast-southwest shortening strain. Variations in strike of magmatic foliation in the Taft Granite likely results from a combination of regional strain and internal processes within a magma chamber

    Testing Management-Oriented Hypotheses with Simulation Models

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    Author Institution: College of Forestry and Natural ResourcesWe need to manage and to use our renewable resources more wisely and yet more intensively in the future. To do this we need to incorporate more of our experience, our data, and our theory into the decision-making process. We can use simulation models in this synthesis effort to advantage. We can perform management experiments with ecosystem level models, generate meaningful output from those experiments, and condense and interpret this output in a manner useful to the management agency personnel. The result will be better resource management decisions based on scientifically and technically defendable information which will have greater internal consistency and which will produce better results under many conditions

    Alien Registration- Van Dyne, Arthur V. (Sebec, Piscataquis County)

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    https://digitalmaine.com/alien_docs/8501/thumbnail.jp

    Simulation of Locking Space Truss Deployments for a Large Deployable Sparse Aperture Reflector

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    Large deployable space structures require an inordinate amount of effort to fully design and test on Earth. To aid in the determination of the feasibility of the reflector, a method to simulate the structure\u27s deployment was developed using COMSOL. The simulation model is comprised of a locking hinge truss that constitutes the partial reflector structure. To meet computational and temporal restrictions, the structure is simplified to use simple beams with square cross sections and is meshed to a sufficient accuracy with second order elements. The geometry is modeled in the truss\u27s stowed configuration, with the connecting hinges and applied forces created via constraint equations in COMSOL. Many different simulations were run with varied design parameters in order to demonstrate the global motion of the deploying truss under differing conditions and to also showcase the capabilities of COMSOL\u27s implicit solver. It was found through all of the simulation variations that the success of the truss\u27s deployment is largely dependent on the condition of the lower truss members as well as the interaction between the spring-loaded hinges and tension cables. The results demonstrate how COMSOL can be used to aid in the advancement of the Large Deployable Space Aperture Reflector design

    Effects of the Intensity of Grazing on Range Livestock Production, the Native Vegetation, and the Soil Complex

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    Maximum sustained livestock production can be obtained only through proper grazing practices on the range and efficient feeding practices in the feedlot. Adjusting livestock numbers to prevent overuse of the range resource is the principle problem in securing purpose of South Dakota’s rangelands. There is considerable variation in the intensity of grazing on rangelands in the state. It is recognized that if a range is stocked too heavily the native vegetation deteriorates, causing decreased forage and livestock production and often considerable soil erosion. It is equally apparent hat too light grazing fails to make use of forage, and total livestock production per unit of land is decreased. An intensity of grazing study was initiated in 1942 at the Cottonwood Range Field Station to study the effects of heavy moderate, and light grazing on the vegetation and on cow and calf production. Results of the first nine years of this study were reported in South Dakota Agricultural Experiment Station Bulletin 412 in 1951. This thesis reports on the effects of the intensity of grazing on cow and calf production since 1952 and on the cumulative effects of different grazing intensities on the native vegetation and the soil complex, with observations of the effects of grazing treatments on the biota

    Easing the Burden of Program Assessment: Web-based Tool Facilitates Measuring Student Outcomes for ABET Accreditation

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    The rapid pace of technology and social change necessitates a process of continuous program improvement for academic programs. ABET accredits educational programs, ensuring that these programs meet criteria such as continuous program improvement. Continuously collecting data, analysis of that data to determine what is, and is not, working, and updating programs accordingly consumes considerable faculty and administrative time. Software tools can help. This paper describes a tool developed and used by our department. This software tool: 1. Reduced the burden of measuring student outcomes for members of our department for six years, and will continue to do so in the future. 2. Received praise by members of two ABET accreditation teams who suggested marketing the software to help other programs seeking, or maintaining, ABET accreditation. 3. Is undergoing enhancements for other departments in our school. The software was developed by students over multiple offerings of six courses in our curricula. Keywords—ABET accreditatio

    Southwest Missouri's changing farm supply picture

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    March, 1990"This study was partially funded by the Agricultural Cooperative Service, USDA, under cooperative agreement 58-3J321-50018"Includes bibliographical references (page 21)

    Departmental savings and loss characteristics for 12 locally owned farmer cooperatives, 1985

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    New 10/87/550--Cover

    Changes in financial performance, Missouri local form supply cooperatives, 1983-1985

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    Title from JPEG cover page (University of Missouri Digital Library, viewed Mar. 24, 2010)
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