Street layout and design, once established, are then not easily changed. Urban form affects community development, livability, sustainability, and traffic safety. There has been an assumed relationship between urban form and traffic safety that favors designs with less through streets to improve safety. An empirical study to test this assumed relationship was carried out for crash data for Portland, Oregon. This thesis presents an empirical methodology for analyzing the relationship between urban form and traffic safety utilizing a uniform grid for the spatial unit. Crashes in the Portland, Oregon city limits from 2005-2007 were analyzed and modeled using negative binomial regression to study the effect of urban form and street layout through factors on exposure, connectivity, transit accessibility, demographic factors, and origins and destinations. These relationships were modeled separately by mode: vehicle crashes, pedestrian and bicycle crashes. Models were also developed separately by crash type and by crash injury severity. The models found that urban form factors of street connectivity and intersection density were not significant at 95% confidence for vehicle and pedestrian crash rates, nor for different crash severity levels, indicating that high connectivity grid street layout may have comparable safety to loops and lollipops, in contrast to results in earlier studies. Elasticity for all models was dominated by VMT increases. Business density, population and transit stops were also significant factors in many models, underlining the importance not only of street layout design, but also planning to direct development to influence where businesses, employment, and housing will grow and handle traffic volumes safely.

The purpose of this study is to examine indoctrination in Oregon public schools during the period from 1947 to 1975. More specifically, it seeks to define and analyze the assumed changeable and dynamic aspect of indoctrination. The major hypothesis to be tested is that indoctrination has declined in strength during the test period.

Crypsis can be an important mechanism of predator avoidance for organisms. However, many species exhibit sexual dichromatism, in which the males possess a suite of colorations in order to attract female attention. The resulting differences in crypsis between the males and females can provide insight into the relative strengths of the sexually and naturally selective forces shaping the coloration of the organism, as well as clues regarding potential sensory biases of the selecting sex. In this study, I examine variation in the coloration of four Pacific Northwest populations of the sexually dimorphic and dichromatic polygynous species of jumping spider Habronattus oregonensis and compare the coloration of different body regions of the spiders to their habitats. I also investigate differences in relative size of a male sexual ornament, the enlarged first leg tibia. Field work for this study was conducted in June and July of 2009. The three main foci of this study are 1) to compare the degree of color matching of females and their habitat to the degree of color matching of males and their habitat, evaluating whether sexual selection on males has reduced their degree of crypsis relative to that of females, 2) if there is indeed a difference in crypsis between the sexes, to gauge whether there are similar divergences from crypsis among the populations - both in the quantitative amount of divergences as well as the colorimetric direction of such divergences, and 3) whether there is any variation in sexual ornament size among populations. Male first leg tibia size is a sexual character that is presumably not influenced by habitat coloration; differences in male tibia allometry among populations would provide supporting evidence for the hypothesis that sexual selection is indeed maintaining phenotypic differences among the populations, regardless of habitat location and color. I found a high degree of conformity of hue and chroma between male and female spiders and their habitats, with three notable exceptions. The most extreme difference in coloration between spider and habitat was that of the Gorge and Siskiyou population male anteriors. The anteriors had proportionally less green and more ultraviolet reflectance than their habitat. Second, the Mt. Hood and Tillamook population male abdomens diverged from their habitat in a similar, although less pronounced manner to that of the Gorge and Siskiyou population male anteriors: they had proportionally less green and more UV reflectance. Third, female abdomens of all populations were highly variable in chroma, despite having hues that generally matched their habitat. Tibia area relative to body size of Gorge and Siskiyou population males was significantly smaller than that of Mt. Hood and Tillamook population males. The lower level of background hue matching among males compared to females implies that sexual selection has directly conflicted with natural selection, resulting in impaired crypsis. While the reduced crypsis of the Gorge and Siskiyou population males is centered on their anterior (the primary body region presented to the females during courtship), the deviations from crypsis in the Mt. Hood and Tillamook population males are highest on their abdomen, although the degree of contrast is lower than that of the Gorge and Siskiyou population anteriors. These differences in coloration between the Mt. Hood and Tillamook population male abdomens and their habitats are in the same colorimetric direction as those of the Gorge and Siskiyou population anteriors and their habitat; this may indicate a sensory bias of the females, conserved in all four populations, selecting for male reflectance with a higher UV to green ratio. The fact that Mt. Hood and Tillamook population male abdomens have a more modest reduction in background matching compared to Gorge and Siskiyou population male anteriors may be due to the search methods of flying predators (e.g., spider wasps); the dorsum would presumably be more conspicuous to predators than the anterior, and would thus be subject to more intense selection for crypsis despite sexual selection to the contrary. The variability of abdomen coloration of females of both morphs may indicate that selection for crypsis is less strong among females than among males. One possible reason for this would be if females spent less time in the exposed courtship habitat than males, a conclusion implied by a highly male-skewed sex ratio encountered during field collections. Like the differences in coloration between different males of different populations, the significant differences in male tibia size also imply variability in the intensity of sexual selection. Relative importance of male coloration and tibia size may be weighted differently among populations, operating under similar constraints on reductions in survival accrued by developing these characters. The high degree of variation found among the populations implies that there is a degree of reproductive isolation among the chromatically and morphologically dissimilar populations. However, the similarity of the environments in which the populations existed, the close geographic proximity of some of the dissimilar populations, and the lack of any substantial geographic boundaries between the populations imply that this isolation is not maintained through extrinsic factors. Rather, it would seem that the interpopulational diversity is maintained by sexual selection. However, evidence from morphology and coloration suggest that the generation of this diversity is not evolving exclusively under sexual selection pressure, but rather is constrained to a degree by natural selection.

This study documents and describes efforts by Oregon school districts to network in order to improve schools and provide resources for staff development. There are at least 41 networks linking school districts, institutions of higher education, and Educational Service Districts in both rural and urban areas of the state. These networks, collaboratives, and consortia have the common purpose of improving education, and the belief that they can accomplish more cooperatively than they can individually. These networks are described in terms of purposes, benefits and problems, and desire for assistance. Comparisons showed that large school districts are much more likely to participate in networks than small ones. This is significant because there are many small school districts in Oregon that would benefit from the assistance of a network in providing resources and expertise for school improvement efforts. Descriptions of three active networks in different parts of the state provided additional information regarding organizational structure, membership, and activities. There is a listing of the membership of 41 networks in the state. Statistical comparisons indicate that the greatest benefits responding school districts derived from networking include increased effectiveness of staff development efforts, sharing of information, cost sharing, and psychological support. Problems encountered in networking were: conflicting work priorities, conflicting goals, organizational problems, and funding. Two-thirds of the districts surveyed would like to have assistance for their efforts in the form of funding or incentives for networking, information on school improvement practices, and communications linkage among school districts. The study indicates that networking is widely practiced in the state of Oregon for the purpose of improving school effectiveness and staff development efforts. Implications are that this is an effective way for schools to accomplish their goals. Therefore, it is recommended that school districts not engaged in this practice give consideration to networking as an effective way to increase resources for school improvement efforts and to become more effective. It is hoped that encouragement and incentives for networking will be forthcoming from state and local education agencies. These agencies should exercise caution that their efforts to encourage networking not create unnecessary structures that would destroy the flexibility that makes networks so effective.

Concerned by the increase in the average daily populations at Maclaren School for Boys and Hillcrest School for Girls, Children's Services Division has requested research related to children who have been released from child care centers and private institutions. Child care centers were originally developed as alternatives to the state institutions. As children were diverted to various child care centers, the populations of these two institutions decreased, and plans were made to merge the two schools, thus closing Hillcrest. With the increase in populations at both schools, this is no longer feasible. As much time and effort is spent in placing children outside of the state schools, C.S.D. would like to have some measure of how effectively its workers are diverting children from the correctional system. A speculation exists among many C.S.D. workers that youngsters are not staying in these child care centers long enough to benefit from the varied programs the centers offer. With these factors in mind, a research design was developed which would cover these variables: 1. The child's placement 2. His length of stay (including dates of placement and release) 3. His disposition upon release 4. His living situation one year following his release

Dutch Canyon is located directly west of the City of Scappoose in Columbia County Oregon. This area is proximate to Highway 30, a major access corridor to downtown Portland, and is experiencing a population increase, which is expected to continue and likely accelerate. As a result, there is growing pressure on water resources. Individual and community efforts to utilize groundwater resources have been hampered by generally poor groundwater yields and water quality concerns outside of the Columbia River corridor and a lack of published hydrogeologic information for the region. The intent of this study is to identify the water-bearing units present in Dutch Canyon and to characterize water quality within these units. The physical hydrogeology of Dutch Canyon was assessed mainly through the collation of 196 local well reports that contained lithologic information from which individual hydrostratigraphic units were identified and characterized. Hydraulic parameters for individual units were estimated using pump rates and drawdowns provided in select well reports. Water quality for the units identified was assessed through the collection of 48 samples of well, spring, and stream water from Dutch Canyon. Measurements of pH, specific conductivity, temperature, dissolved oxygen, reduction potential, and alkalinity were recorded in the field and samples were analyzed for major ions, arsenic, and stable isotopes. The major water-bearing units of Dutch Canyon were separated into five physically distinct hydrostratigrapic units: the lower, middle, and upper units of the sedimentary Lower Miocene Scappoose Formation, and the Wapshilla Ridge and Ortley members of the Lower to Middle Miocene Grande Ronde Basalt. Groundwater flow likely occurs in discrete, relatively thin (~2- to 10-m thick) zones within the Grand Ronde Basalt members. These units only occur along the slopes and ridges of Dutch Canyon west of the Portland Hills Fault, which parallels the eastern margin of the study area. The Scappoose Formation units contain clay- and silt-rich layers and lenses that limit the useable aquifer volume and vertical movement of groundwaters. In general, all hydrostratrigraphic units east of the Portland Hills Fault have low transmissivities and water wells completed in each of them are commonly low- yielding wells, though there are some exceptions. Geochemically, the lower and middle units of the Scappoose Formation were similar to one another with many wells yielding groundwater with high total dissolved solids (TDS) contents (mean TDS = 330 mg L-1; n = 27). Nearly 20% of the wells sampled that were screened in these units (5 of 27) yielded groundwater that exceeded the U.S. Environmental Protection Agency's National Secondary (non-enforceable) Drinking Water Regulation standard of 500 mg L-1 TDS. The upper unit of the Scappoose Formation and the overlying Grande Ronde Basalt members generally yield water with lower TDS contents (mean < 200 mg L-1; maximum = 342 mg L-1; n = 20). Groundwater resources in Dutch Canyon are limited and low well yields are common. The primary water quality concern is saline water, which is generally found in the lower and middle units of the Scappoose Formation near the valley floor. Low recharge rates determined from hydrograph analysis of stream discharge measurements are consistent with the geology and steep terrain of the area and further limit the available groundwater and the degree of flushing of what may be connate waters in the deeper units.

The present study was a response to the discovery of two artifacts found in a ditch wall near Harney Lake, Oregon. These were lying on a buried lake floor that appeared to be of late Pleistocene or early Recent age. Other sediments exposed in the ditch seemed to relate to at least some of the phases of the pluvial lake sequence in the Harney Basin. Three problems were considered: (1) the geomorphology and dating of the pluvial lake stillstands, (2) whether the original artifacts were part of a larger early site, and (3) whether there was any relationship between archaeological sites and geomorphic features in the area. These problems were approached in the field by stratigraphic mapping of exposed sediments and by an archaeological survey of a defined study area. Test excavations were made adjacent to the location of the original artifact discovery to search for other cultural material. Beachline records of four stillstands of Pluvial Lake Malheur are preserved in the exposed sediments. The youngest beachline is undated. Three others were 14C dated from associated fossil molluscs at 32,000, 9620 and 8680 B.P. At least in the case of the 8680 B.P. lake, the Harney Basin was filled to overflowing and was a part of the Columbia River system. The Voltage basalt flow, which dammed the outlet of the Basin in Malheur Gap, was in place by 32,000 years ago. There is no evidence for a diversion of the Basin outlet to Crane Gap following this event. Molluscan fossils and diatoms were used, along with soil texture analyses, to help identify and differentiate sedimentary deposits and to draw environmental inferences. Artifacts were found both on and beneath buried beach deposits of the 8680 B.P. lake. Four of the five sites in the study area were either on wave-cut terraces or other lakeshore features associated with this lake. Diagnostic artifacts are Lind Coulee points, crescents, basally ground leaf-shaped points, and what are apparently true blades. The sites seem to have been located to take advantage of shallow water littoral zone resources. Fish may have been an important dietary item of the early Harney Basin dwellers. Large salmonid vertebrae from fish in the 10 kg weight class are found on the playa. By using the relationship between landforms and elevations it may be possible to predict the general age class of other sites on the margin of the playas.

This study attempts to identify the variables associated with an organization's decision to participate in an interorganizational service network. The survev of literature on the subject supported the hypothesis that structural variables of complexity, formalization, and centralization and a psychological variable, the awareness of organizational interdependency, are associated with the decision to participate. Interorganizational participation was operationally defined in terms of various behavioral components: an organization's involvement with the coordinating agency, client referrals to and from other organizations and to and from the coordinating agency, and information exchanged with other organizations and with the coordinating agency. Using this framework, testable hypotheses were formulated regarding the relationship between the selected measures of the independent variables of complexity, formalization, centralization, and awareness of interdependency and the dependent variable of interorganizational participation. Human service agencies which provide services to the elderly in the State of Oregon were surveyed in this study. These agencies, together with the Area Agency on Aging, a coordinating agency established under the Older Americans Act, constituted the interorganizational service network. A main concern of that type of coordinating agency is to facilitate effective working relationships between the organizations in such service networks. This study was designed to explore the factors associated with that process. Findings and Conclusions: The evidence presented suggests that the psychological variable of awareness of interdependency is significantly related to the decision to participate. This finding was generally supported by qualitative data gathered from six organizations examined under the case study method. For the structural variable it was found that: a) complexity was not significantly related to the decision to participate; b) centralization had a significant relationship with only some components of the measures of participation; c) there was some association between formalization and the participation processes. In general, it appears that a key step to building effective networks of service organizations is to increase awareness of interdependency among organizational members.

A nutrition education program for employed women on maintaining a healthy weight was developed and evaluated. Delivery of eight messages (two per week for four weeks) by electronic mail was tested for effectiveness. The subjects were 243 members of the Oregon State University Office and Personnel Association who were randomly assigned to three experimental groups. Group #1 received hard copies of the messages, group #2 received hard copies along with a weekly electronic tip on weight management, and group #3 received the messages by electronic mail (e-mail). An evaluation survey was developed to assess: 1) Participants' stage of change regarding fat in the diet, 2) Participants' social support network for weight maintenance, 3) Reactions to the program, 4) Impact of the program on positive behavior regarding weight control, and 5) Demographics. The survey was sent by campus mail about three weeks after the program. The evaluation was completed by 80.2% of participants. The nine male respondents and the two gender-unidentified respondents were not included in the data analysis to assure a total female population. A total of 181 surveys were analyzed (74.5%). The mean age of female respondents was 47.8 ± 13.3. Although it was hypothesized that electronic delivery of the program and/or supplementing the hard copy/print program with brief electronic tips would be associated with higher order stages of change (Transtheoretical Model), the results from this study did not support the hypotheses. There was no significant difference in stage of change among participants in the three modes of delivery. The messages appeared to have the greatest impact on women in the action and preparation stages. They tended to make more positive changes (i.e. reading food labels) than women in the maintenance, contemplation, and precontemplation stages. Mode of delivery did not appear to make a difference in whether the women looked forward to the messages, reactions to message length, how many were read, or the resulting knowledge or behavior change. Therefore, it may not be critical to program effectiveness. Women in the electronic group, however, were more certain that they received all eight messages and were more apt to ask questions of the researcher. The potential cost savings, convenience, and ease of quick communication make it a more attractive option. Access to the technology and participant preference are equally important factors. / Graduation date: 1997

Nitrate concentration in excess of national drinking-water standards (10 mg/l) are present in the shallow alluvial aquifer and Saddle Mountains Basalt (SMB) aquifer in the Lower Umatilla Basin, Oregon. To determine sources responsible for elevated nitrate concentrations in the SMB aquifer mass-balance and reaction-path models (NETPATH and PHREEQE) were used to understand observed geochemical trends. Nitrate-nitrogen isotopes were used to distinguish potential nitrate sources in the shallow alluvial aquifer. NETPATH-validated simple water/rock reactions in the SMB aquifers in Irrigon (dissolving glass, precipitating smectite, dissolving or precipitating calcite, and cation exchange) using constituents (calcium, magnesium, sodium and carbon). Diversity of composition for the shallow alluvial water and limited number of wells available made obtaining a mass balanced solution for the SMB aquifer near Boardman impossible. Irrigon basalt groundwaters were consistent with the PHREEQE models prediction of natural hydrochemical trends, where Boardman basalt groundwaters plotted consistently with impacted alluvial groundwater. Nitrogen-isotopic values of nitrate (o 15NNo3) were measured in the shallow alluvial groundwater from 17 wells in 4 land-use settings, 3 lysimeter samples and 1 surface water effluent sample. The landuse setting and corresponding average ranges for nitrate concentrations (as N) and 015NNo3 values for wells near: commercial fertilizer-irrigated fields range from 25-87 mg/l, +3.5 to +4.6 per mil; explosive washout lagoons ranged from 10-18 mg/l, +4.6 to +4.9 per mil; potato waste water application ranged from 6.4-17.8 mg/l, +4.4 to +35 per mil; past confined animal feeding operations (CAFO) ranged from 16-56 mg/l, +4.9 to 10.4 per mil; lysimeters 5.4-39.9 mg/l, +9.1 to +21.9 per mil; surface water effluent ranged from 60-61 mg/l, +3.5 to 6.5 per mil; and varying landuse ranged from 9.3-19.5 mg/l, +2.7 to +7.1 per mil. Commercial fertilizer 0 15NNo3 signatures are consistent for this source. Explosive 015NNa3 values are consistent with an atmospheric signature. CAFO o15NNo3 signatures probably result from mixing between currently applied commercial fertilizer and past CAFO's. High 015NNo3 Signatures (+22 to +35 per mil) imply denitrification. Potato waste water and varying land-use 015NNo3 signatures indicate probable mixing of nitratenitrogen sources in the groundwater.