Structural Origins of the Doonerak Anticline, Central Brooks Range, Alaska

The Doonerak anticline in the central Brooks Range, Alaska, exposes a package of Early Paleozoic metavolcanic and metasedimentary rocks overlain by Carboniferous to Triassic sedimentary rocks which have been correlated to the North Slope subsurface. The flanks of the anticline have been interpreted as portions of a single north-vergent nappe system emplaced during the Brookian orogeny. The Doonerak anticline is a key location for understanding the structure of the Brooks Range fold and thrust belt. Field mapping, microstructural analysis, Raman-spectroscopy of carbonaceous material (RSCM) paleothermometry, and detrital zircon geochronology data suggest the structure is not a tectonic window resulting from erosion of a single north-vergent nappe system. Structures in the units to the north of the anticline are south-vergent, while structures in units to the south of the anticline are north-vergent. Detrital zircon geochronology and petrographic data show that Devonian clastic units in the Endicott Mountains allochthon north of the anticline are not correlative to slates and phyllites in the Hammond assemblage south of the anticline. RSCM paleothermometry shows the southern units reached temperatures of 368+/-16°C and were buried ~12 km while the northern units reached 313+/-19°C and were buried ~10 km. A new model is proposed which accounts for observed structural and lithologic relationships and calculated paleotemperatures. In this model, the southern assemblage was emplaced by north-directed thrusting and northern assemblage was emplaced by south-directed motion along a later back-thrust during the predominantly north-vergent Brookian orogeny

Perceived Need for Change: A Test of Individual Emotion and Contextual Influences

By investigating organizational change as a change to the status quo as opposed to an explicit change program, this study explored antecedents of a perceived need for change, defined as an individual attitude to actively support a general change to the status quo within the context of a specific process. This cross-sectional study investigated the individual attitudes of construction service providers (n = 193) as their headquarters announced that a change to an existing process would soon be developed. Utilizing hierarchical regression, employees were found to recognize a perceived need for change when they experienced low levels of perceived organizational support, felt positive emotions towards the change to the status quo, and believed that customers had a poor view of the organization’s service quality. Among the managerial implications, first, it supports previous research regarding the importance of emotion in the internalization of change programs. Second, the negative relationship between perceived organizational support and perceived need for change suggests that employees respond to the organization as a system, not necessarily to the stated desires of management. Lastly, it suggests that employees may be ready to act on feedback from customers if they were given an opportunity to do so

Vapor phase growth technique of III-V compounds utilizing a preheating step

In the vapor phase epitaxy fabrication of semiconductor devices and in particular semiconductor lasers, the deposition body on which a particular layer of the laser is to be grown is preheated to a temperature about 40.degree. to 60.degree. C. lower than the temperature at which deposition occurs. It has been discovered that by preheating at this lower temperature there is reduced thermal decomposition at the deposition surface, especially for semiconductor materials such as indium gallium phosphide and gallium arsenide phosphide. A reduction in thermal decomposition reduces imperfections in the deposition body in the vicinity of the deposition surface, thereby providing a device with higher efficiency and longer lifetime

The instrumentation of a parallel, distributed database operation, retrieve-common, for merging two large sets of records

The Naval Postgraduate School's Laboratory for Database Systems Research is the site of the multi-backend database supercomputer (MBDS). Originally, MBDS supported a prototype primary operation (retrieve-common) which merged two sets of records in a distributed, parallel database environment. This thesis presents the testing, and modification of that prototyped primary operation. First, the design rationale of the MBDS is reviewed. Specifically, this review examines the reasons for a databaseoriented supercomputer, the MBDS primary processes, and the methodology of distributing a database within loosely coupled and highly parallel database stores. Then, this study explains the methodology involved in developing theories on the cause of retrieve-common's defects and bottlenecks. Finally, in validating our theories, this study relates the process of discovering and correcting these discrepancies.http://archive.org/details/instrumentationo00hammLieutenant, United States NavyWu, Thomas C.Approved for public release; distribution is unlimited

The California energy crisis and cogeneration investment opportunities for office landlords

Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Architecture, 2001.Includes bibliographical references (p. 79-89).For the past eight months, California has been beset by an energy crisis. An inadequate supply of electricity has not been able to keep up with the growing demand. Vital transmission lines are operating at or near capacity. The installation of cogeneration systems into office buildings can play an important role in the overall solution. Cogeneration is a form of on-site generation that can provide electricity to office landlords and tenants that is less costly and more reliable than that provided by the utilities. There are several ways that office cogeneration systems can ease the pressure on California's electric generation and transmission infrastructure. First, office buildings consume 26% of all electricity nationwide. They place an equally great demand on California's generating capacity. With widespread application, the siting of cogeneration systems in office buildings can reduce the demand placed on California's centralized power plants (CPPs). Reducing the demand for electricity that is centrally generated and delivered via transmission lines reduces the risk of blackouts and the cost of wholesale and retail electricity. Second, because transmission lines are already operating at or near their capacity, it will be problematic to deliver the new centralized generation capacity that is coming on-line. It will be many years and billions of dollars before the transmission lines are fully upgraded. On-site cogeneration reduces the electrical congestion on these power lines, enabling more of the new centralized generation to get delivered. Third, office cogeneration systems can be deployed in one-fifth of the time it takes to place a large CPP into operation. The quicker more generation can be added, the sooner a healthy supply/demand balance can be struck. Because of their small-scale and relatively simple component parts, office cogeneration systems can be completely permitted, installed and in-operation within 90 to 180 days. By contrast, it takes up to two and one-half years to permit, construct and place a large CPP into operation. When fuel such as natural gas is combusted at a CPP, only 33% of the energy that is released via the combustion process actually reaches the remotely located end-users (e.g., homes and businesses) in the form of electricity. The conversion efficiency of an office cogeneration system is 75%, twice that of the CPP. Consequently, a cogeneration system can produce the electricity needed by a given office building while using only half the amount of fuel that a CPP would require. As these office cogeneration systems are located on-site, not only is the cost of transmitting electricity over long distances eliminated, so are the expenses associated with the maintenance and repair of the power grid. The fuel and transmission cost savings are what primarily enable office cogeneration systems to deliver electricity to office landlords and tenants at a fraction of the cost of power provided by the CPPs. The resultant price differential is what creates the investment opportunity for office landlords.by Gregory L. Hammond.S.M