http://hdl.handle.net/1957/88 Search the Channel search http://ir.library.oregonstate.edu/dspace/simple-search http://hdl.handle.net/1957/9242 Title: Geology of the Antone district of Wheeler County, Oregon <br/> <br/>Abstract: The area studied in detail, known as the Antone District, is located in the southeast corner of Wheeler County, Oregon, , between longitude 119 37. and 119°54 east, and latitude 44°23 and 44°3O' north. Surface elevations range from 3050 feet above sea level in the northeast corner of the district, to 6M5 feet on Spanish Peak. The Miocene Columbia Biver lavas outcrop over 48 of the 68 square miles in the district. Older rocks exposed include Pre- Cretaoeous mota-sedimente and metamorphosed intrusives, Cretaceous conglomerates and sandstones, a granite porphyry pluton, and the brilliantly colored rooks of the upper 011goe.ne and lower Miocene John Day. The early Tertiary formation known as the Clarno does not outcrop in this district. Younger formations include the gravels and tuffs of the upper Miocene Mascall formation, extensive outcrops of the Pliocone Rattlesnake, and limited accumulations of undifferentiated Quaternary alluvium. A horublende andesite extrusive, which is probably of Pleistocene age, occurs in the western part of the district. Eaoh of the above stratigraphic units is discussed under the following headings: Distribution and Topographic Expression; Lithology; Thickness; Age and Stratigraphic Relations. A section of the "Dayville Quadrangls, issued by the U. S. aeologioal Survey, was used as a base for a detailed map showing the distribution of the various formations. Special attention was devoted to the study of the Pre-Cretaceous rooks. Approximately 8000 feet of ohloritic schist, argillite, caleareous sohist, phyllie, marble, and quartzite are included in this older series. Basic Intrusives, largely altered to serpentine, cut the meta-sediments. The structure of the Antone District is discussed under the following subheadings: John Day Valley Syncline; Ochoco Escarpment and Highland; Pre-Cretaceous Folding and Faulting; Cretaceous Monocline; and, Fracturing and Slumping of the Rattlesnake Formation. Special sections have been devoted to historical and economic geology. The report is adequately illustrated with photomicrographs of representative rooks and with numerous pertinent detail photographs. Also included is a plate showing the structural details of a north-south section through the middle of the Antone District. <br/> <br/>Description: Graduation date: 1949; Presentation date: 1948-06-11 Thu, 10 Jun 1948 22:58:59 GMT http://hdl.handle.net/1957/9241 Title: The review of PPP toll roads in the US and the simulation of the Chicago Skyway <br/> <br/>Abstract: As the traffic demand increases at a faster rate than the upgrade and maintenance of transportation facilities through the traditional public financing methods in the United States, the Public-Private Partnership (PPP) is becoming an important supplement to the public transportation infrastructure investment. There are already several existing PPP toll road projects in the United States that provide examples of practical experiences and lessons for launching future PPP toll road projects. Additionally, research in the past three decades has made significant progress in relevant research fields about PPP toll roads, for instance, toll regulation, private revenue restriction, and risk allocation. However, it is still difficult to apply these academic models and research results into practical projects. Therefore, one of the objectives of this thesis is to point out the gap between the analytical research results and practical needs, through reviewing systemically the current PPP toll road projects in the United States and the theoretical research. Potential research interests to focus on how to narrow those gaps between the theoretical research and practical projects’ needs by improving the models or releasing the assumptions, to make the analytical research results helpful to those decision-makers when facing a new PPP toll road project. In addition, the paper simulates the Chicago Skyway, which is the first long-term leased toll road in the U.S., in order to predict the future travel and welfare impacts caused by the PPP toll road. Moreover, a “non-compete” clause experiment is designed and the codes of programming is done in this paper. Future studies can use the experiment and programming to test the effects of the “non-compete” clause to PPP toll roads. <br/> <br/>Description: Graduation date: 2009 Sun, 17 Aug 2008 22:58:59 GMT http://hdl.handle.net/1957/9240 Title: Height-related trends in structure and function of Douglas-fir foliage <br/> <br/>Abstract: This dissertation investigated the impacts of tree height upon a range of physiological and structural characteristics of Douglas-fir foliage; relationships between structural and functional trends with height; and compensatory mechanisms that mitigate height-related growth constraints. Height-related trends in foliar physiological and anatomical characteristics were examined both within trees as well as between trees of different heights. Emphasis was placed on discovering the mechanistic nature of the observed growth constraints and adaptive strategies. This research was conducted in the interest of enhancing our knowledge of the causes of age- and size-related decline in forest productivity. The research conducted for this dissertation explored several previously uninvestigated mechanisms for size-related reductions in forest productivity that are associated with tree foliar structure and function. Height-related trends in foliar turgor associated with the gravitational hydrostatic pressure gradient were identified as well as subsequent impacts on leaf and shoot morphology. Osmotic potential declined with height providing evidence of osmotic adjustment to offset the height-related decline in leaf turgor. This osmotic adjustment occurred only seasonally, and not during the spring when turgor maintenance is most important for leaf expansion. Gradients in leaf turgor were reflected in height-related trends in leaf and shoot morphology. Previous work has documented height-related trends in foliar morphological characteristics and earlier studies have examined osmotic adjustment as an adaptation to drought and salinity stress. Height-related trends in foliar morphological characteristics have typically been attributed to light gradients along vertical profiles. The work in this dissertation is the first to evaluate the effects of the gravitational component of water potential on the osmotic, morphological and growth characteristics of foliage along a height gradient in tall trees. Trends in leaf hydraulic efficiency and safety along a height gradient were examined, and correlations between changes in leaf hydraulic conductance (Kleaf) and changes in stomatal conductance (gs) were identified that provided evidence of a control mechanism for gs. A consistent relationship was discovered between changes in Kleaf and gs providing evidence that leaf tracheid embolism is associated with stomatal closure during periods of declining water availability. Hydraulic vulnerability curves of foliage collected at different heights indicated that increased height is correlated with reduced hydraulic efficiency and increased hydraulic safety. These opposing trends suggest the existence of a compensatory mechanism in foliage that functions to reduce hydraulic vulnerability at the expense of transport capacity. The research in this dissertation is the first to examine the dynamic relationships between leaf hydraulics and stomatal behavior in temperate conifers, and the first to examine how these characteristics are affected by tree height. Height-related trends in leaf xylem anatomical characteristics were examined and strong correlations were identified between these anatomical characteristics and the patterns of leaf hydraulic efficiency and safety that were observed in previous work for this dissertation. Theoretical estimates of leaf hydraulic efficiency (Kleaf-theoretical) based upon the Hagen-Pouseille equation and measured leaf tracheid anatomical characteristics were strongly correlated with laboratory measurements of Kleaf, providing further evidence of a causal relationship between height-related trends in both leaf tracheid anatomical properties and leaf hydraulic function. Earlier studies have documented connections between leaf anatomical characteristics and leaf physiological characteristics such as correlations between leaf architecture and gas exchange and leaf architecture and transport efficiency. The research in this dissertation however, is the first to examine the impact of tree height on leaf anatomical characteristics and associated shoot physiological properties. Trends in gas-exchange along a height gradient were identified, independent of the immediate effects of path length and gravitational resistance. Photosynthesis under ambient [CO2] declined with height in a manner that was consistent with height-related trends in mesophyll anatomy and independent of leaf nitrogen content. Analyses of mesophyll resistance from assimilation versus internal CO2 concentration (A-Ci) curves indicated that height-related trends in mesophyll resistance were correlated with trends in both photosynthesis and mesophyll anatomy along a height gradient. Analyses of integrated and instantaneous water use efficiency indicated that height-related trends in integrated water use efficiency are attributable to the effects of path length and gravity on stomatal behavior as opposed to a height-related trend in intrinsic foliar properties. The research in this dissertation is the first to isolate the influence of height-related trends in foliar structure on different gas exchange properties such as assimilation and mesophyll conductance, independent of the direct effects of vertical gradients in xylem tension on stomatal and photosynthetic physiology. <br/> <br/>Description: Graduation date: 2009 Tue, 15 Jul 2008 22:58:59 GMT http://hdl.handle.net/1957/9235 Title: A plan of timber management and of road development for tract A in the Wassen Creek drainage of northwest Douglas County, Oregon <br/> <br/>Description: Graduation date: 1962; Presentation date: 1961-07-15 Fri, 14 Jul 1961 22:58:59 GMT