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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
51

Selective Logging in Subtropical Montane Forests of the Andes: Its Effect on Avian Cavity Nesters

Politi, Natalia January 2008 (has links) (PDF)
No description available.
52

The economic feasibility of modifying six conventional harvesting systems to recover logging residues for fuel and fiber

Porter, Carl Donald January 1979 (has links)
This analysis provides a relative ranking of six Southern harvesting systems in terms of the costs, capitalization, and operational feasibility of incorporating a Trelan Model C-14 portable chipper or a residue baler to recover logging residues for fuel and fiber on three Southern stand types. The six systems were also considered under six cutting regimes to allow for the varying management objectives employed by woods managers in the South. The Harvesting Systems Simulator was used to perform the analyses. Data was collected from members of the American Pulpwood Association and equipment manufacturers in the South to use as input for the simulations. Each combination of system, stand, and regime was considered in terms of eight factors designed to express system performance. Results of the analysis indicated that logging residue recovery was economically feasible in many Southern harvesting systems. As long as conventional products are merchandized and the flow of those products through the harvesting system is not interrupted, residue recovery will be profitable on most southern stand types. Clearcutting fqr energy and thinning for energy were not economical on any stand due to the loss of revenues from conventional products. As woody fuel prices go up, this situation will change. Results· showed that the machine energy required to produce the residue energy was minimal for all systems on all stands and in all regimes. This indicates that residue recovery is not only economically feasible but energy efficient as well. / Master of Science
53

Physical and chemical characteristics of rocks from downhole measurements

Bristow, James F. January 1993 (has links)
No description available.
54

Damage to the residual stand due to skyline yarding /

Burditt, Audrey Lynn. January 1981 (has links)
Thesis (M.F.)--Oregon State University, 1982. / Includes bibliographical references (p. 69-70). Also available on the World Wide Web.
55

Production rates and skidding cost of the FMC model 210 CA high-speed skidder : second draft /

Ohmstede, Robert H. January 1977 (has links)
Thesis (M.F.)--Oregon State University, 1977. / Typescript (photocopy). Includes bibliographical references (p. 48-49). Also available on the World Wide Web.
56

Tilling compacted forest soils following ground-based logging in Oregon /

Andrus, Charles Wesley. January 1982 (has links)
Thesis (M.S.)--Oregon State University, 1982. / Typescript (photocopy). Includes bibliographical references (leaves 142-148). Also available online.
57

Prebunching with a low investment skyline yarder in thinnings /

Keller, Robert Richard. January 1979 (has links)
Thesis (M.S.)--Oregon State University, 1980. / Typescript (photocopy). Includes bibliographical references. Also available on the World Wide Web.
58

Monitoring and loggingsystem for home use. : An 8-bit approach.

Peredera, Dmitri January 2011 (has links)
The thesis discusses the creation and implementation of a monitoring and notificationsystem for home use. The topic may have interest during the warm Swedish summer andlong winter nights, when the weather conditions put home flora to the test. The vividimagination together with a life-long experience of the author predicts a total devastation ofgreen plants inside the apartment. A more general approach will allow tracking e.g. of livinghabits and notification of important events like mail arrival.The paper discusses a power management of devices, wireless and wired communicationand data storage on embedded 8-bit microcontroller manufactured by Microchip. A simpleanalysis of price, performance and memory requirements is done. The practicalimplementation of the prototype suffered somewhat from lack of lab space and otherlimitations of the home environment, where the device was assembled.The achieved results suggest the possibility of such realization. However, the realization hasincluded major changes compared to the originally envisioned device, in order to keepwithin the limits brought on by the home environment.The prototype has some design flaws and is a subject to further revision. Nevertheless, thebasic idea and solution have proved to be feasible: A modern 8-bit MCU has the capacity torun the intended kind of monitoring and logging system. However the performance is slightlyless than hoped for and the experienced memory limitations may suggest a migration to a16-bit architecture.
59

A 3D finite-element modelling investigation into optimal survey parameters and direct imaging for marine controlled-source electromagnetic surveys

Lau, Ryan 17 September 2007 (has links)
Relatively little is known about marine controlled-source electromagnetic surveys (MCSEM) used to detect hydrocarbon reservoirs. Typical MCSEM require the use of inversion to generate a model of the subsurface. We utilize a 3D finite-element forward model to simulate a MCSEM survey. With the results we were able to determine the strengths and weaknesses of each transmitter and receiver configuration that would best detect a shallow hydrocarbon target. Careful selection of the correct configuration is important as we have found that incorrect transmitter orientation, offset and receiver measurement component can yield misleading results. Using the ideal configuration we were able to directly image the hydrocarbon target without the use of inversion modeling. The direct image is able to show the hydrocarbon target's shape and edges without any ambiguity. The direct image of the target can potentially be used to refine 3D inversion modeling, or be used in conjunction with seismic profiles to refine seismic picks.
60

Implementation costs of Kentucky's erosion control best management practices for skid trails

Shouse, Bennett Scott. January 2002 (has links) (PDF)
Thesis (M.S.)--University of Kentucky, 2001. / Title from document title page. Document formatted into pages; contains vi, 75p : ill., maps. Includes abstract. Includes bibliographical references (p. 74).

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