Digital Commons Network^™

Richard Goldschmidt And The Crossing-Over Controversy, Michael Dietrich, Marsha Richmond

Dartmouth Scholarship

This book, Perspectives on Genetics, collects more than 100 of these essays, which cumulatively are a history of modern genetics research and its continuing evolution.

Whatever Happened To Anti-Semitism? How Social Science Theories Identify Discrimination And Promote Coalitions Between "Different" Minorities, Clark Freshman

Faculty Scholarship

No abstract provided.

Tributaries To West Antarctic Ice Streams: Characteristics Deduced From Numerical Modelling Of Ice Flow, Christina L. Hulbe, Ian R. Joughin, David L. Morse, R. A. Bindschadler

Geology Faculty Publications and Presentations

A network of relatively fast-flowing tributaries in the catchment basins of the West Antarctic ice streams transport ice from the inland reservoir to the heads of the ice streams. Branches of the network follow valleys in basal topography, but not all valleys contain tributaries. We investigate the circumstances favoring tributary flow upstream of Ice Streams D and E, using a combination of observation and numerical modelling. No consistent pattern emerges. The transition from tributary to ice-stream flow occurs smoothly along the main tributary feeding into the onset of Ice Stream D, with ice thickness being relatively more important upstream, and …

The Link Between Climate Warming And Break-Up Of Ice Shelves In The Antarctic Peninsula, Ted A. Scambos, Christina L. Hulbe, Mark A. Fahnestock, Jennifer Bohlander

Geology Faculty Publications and Presentations

A review of in situ and remote-sensing data covering the ice shelves of the Antarctic Peninsula provides a series of characteristics closely associated with rapid shelf retreat: deeply embayed ice fronts; calving of myriad small elongate bergs in punctuated events; increasing flow speed; and the presence of melt ponds on the ice-shelf surface in the vicinity of the break-ups. As climate has warmed in the Antarctic Peninsula region, melt-season duration and the extent of ponding have increased. Most break-up events have occurred during longer melt seasons, suggesting that meltwater itself, not just warming, is responsible. Regions that show melting without …

Improved Regression-Based Streamflow Forecasting Considering Large-Scale Climate Variability, Austin R. Fisher

Dissertations and Theses

The Natural Resources Conservation Service (NRCS) produces water supply forecasts for most of the streams in the western United States. The NRCS produces forecasts starting in January, when snow course measurements of snow water equivalent were available. Although the seasonal streamflow volume forecasts made by the NRCS are useful, many water supply managers need information at the beginning of the water year in October and would like to see forecasts in the form of a monthly hydrograph.

An investigation into the effect of decadal scale variability, as reflected by the Pacific Decadal Oscillation (PDO), show important relationships that may be …

The Long-Term Viability Of A Zero-Valent Iron Permeable Reactive Barrier, Stuart Cowburn

Dissertations and Theses

Zero-valent iron permeable reactive barriers (PRB's) hold significant potential as a tool for groundwater remediation. Uncertainties remain, however, as to the effective lifetime of Fe⁰ barrier technology under full-scale operational conditions. Potential limits on barrier lifetime include reductions in permeability due to clogging by precipitates and oxidation of all Fe⁰ prior to the exhaustion of the contaminant source.

A 46 m long, 0.6 m wide, and 7.3 m deep Fe⁰ PRB was installed at the US Coast Guard Support Center, Elizabeth City, NC, in June 1996. The barrier was designed to remediate groundwater principally contaminated with Cr(VI) …

Correlation Analysis Of Sfi Peculiar Velocities, Stefano Borgani, Luiz N. Da Costa, Idit Zehavi, Riccardo Giovanelli, Martha P. Haynes, Wolfram Freudling, Gary Wegner, John J. Salzer

Dartmouth Scholarship

We present results of a statistical analysis of the SFI catalog of peculiar velocities, a recently completed survey of spiral field galaxies with I-band Tully-Fisher distances. The velocity field statistic utilized is the velocity correlation function, ψ₁(r), originally introduced by Górski et al. The analysis is performed in redshift space so as to circumvent potential ambiguities connected with inhomogeneous Malmquist bias corrections. The results from the SFI sample are compared with linear-theory predictions for a class of cosmological models. We generate a large set of mock samples, extracted from N-body simulations, which are used …

Integrated Floorplanning And Buffer Insertion For Bus-Based Microprocessor Designs, Faran Rafiq

Dissertations and Theses

In this thesis, we propose a novel algorithm for the interconnect driven floorplanning problem that integrates bus planning with floorplanning. This integrated floorplanner is intended for bus-based designs in which the layout is considered to be a set of blocks connected through buses. Each bus consists of a large number of wires. Our floorplanner allocates the exact location and shape of the interconnect (both above and between the circuit blocks) and ensures routability as well as optimizes the timing goals. Our experiments with benchmarks clearly show the superiority of integrated floorplanning approach over the classical floorplan-analyze-and-then-refloorplan approach. Our initial results …

Greenhouse Gases And Other Airborne Pollutants From Household Stoves In China: A Database For Emission Factors, J. Zhang, K. R. Smith, Y. Ma, S. Ye, F. Jiang, W. Qi, P. Liu, M. A. K. Khalil, R. A. Rasmussen, S. A. Thorneloe

Physics Faculty Publications and Presentations

Emissions from household stoves, especially those using solid fuels, can contribute significantly to greenhouse gas (GHG) inventories and have adverse health impacts. Few data are available on emissions from the numerous types of cookstoves used in developing countries. We have systematically measured emissions from 56 fuel/stove combinations in India and China, a large fraction of the combinations in use world-wide. A database was generated containing emission factors of direct and indirect GHGs and other airborne pollutants such as CO2, CO, CH4, TNMHC, N2O, SO2, NOx, TSP, etc. In this paper, we report on the 28 fuel/stove combinations tested …

Civic Discourse Amid Cultural Transformation, Calvin R. Massey

Faculty Scholarship

No abstract provided.

Detection Of Co And Dust Emission In Near-Infrared Spectra Of Sn 1998s, Christopher L. Gerardy, Robert A. Fesen, Peter Höflich, J. Craig Wheeler

Dartmouth Scholarship

Near-infrared spectra (0.95 – 2.4 μ m) of the peculiar Type IIn supernova 1998S in NGC 3877 from 95 to 355 days after maximum light are presented. K -band data taken at days 95 and 225 show the presence of the first overtone of CO emission near 2.3 μ m, which is gone by day 355. An apparent extended blue wing on the CO profile in the day 95 spectrum could indicate a large CO expansion velocity (≈ 2000 – 3000 km s − 1). This is the third detection of infrared CO emission in nearly as many Type II …

State-Based Reconstructability Modeling For Decision Analysis, Michael S. Johnson, Martin Zwick

Complex Systems Faculty Publications and Presentations

Reconstructability analysis (RA) is a method for detecting and analyzing the structure of multivariate categorical data. Jones and his colleagues extended the original variable-based formulation of RA to encompass models defined in terms of system states (Jones 1982; Jones 1985; Jones 1985; Jones 1986; Jones 1989). In this paper, we demonstrate that Jones’ previous work comprises two separable ideas: the “g to k” transformation and state-based modeling. We relate the concept of state-based modeling to established variable-based RA methods (Klir 1985; Krippendorff 1986), and demonstrate that statebased modeling, when applied to event and decision tree models, is a valuable adjunct …

N-Player Prisoner's Dilemma In Multiple Groups: A Model Of Multilevel Selection, Jeffrey Fletcher, Martin Zwick

Complex Systems Faculty Publications and Presentations

This presentation discusses simulations of the n-player Prisoner's Dilemma in populations consisting of multiple groups, and how Sampson's paradox can emerge in such game theoretic situations.

Meeting Agenda October 2000 - June 2005, Portland State University Faculty Senate

Faculty Senate Meeting Agenda Compilations (Five Year)

Meeting agendas of the Faculty Senate for October 2000 to June 2005.

Conservation Des Habitats De Roussettes De Livingstone – Les Massifs Forestiers D’Anjouan Et Moheli, Comores: Utilisation D’Indicateurs Sociaux Et Ecologiques, Elise F. Granek

Environmental Science and Management Faculty Publications and Presentations

Le déboisement sur les lles d'Anjouan et Moheli a augmenté a un taux alarmant au cours de ce siecle (PNUD 1998). Ce changement de la couverture des sols et des forets naturelles a des consequences nefastes pour toutes les especes vivant sur les iles, en particulier pour les especes vegetales et animales endemiques, et les communautes humaines locales. Pour diminuer la pression anthropique sur Ie milieu naturel, le Fonds pour l'Environnement Mondial et Ie PNUD ont mis en place un projet de cinq ans qui travaille avec Ie Ministere comorien de l'Environnement pour creer un reseau d'aires protegees dans les …

An Analysis Of Pteropus Livingstonii Roost Habitat: Indicators For Forest Conservation On Anjouan And Moheli, Elise F. Granek

Environmental Science and Management Faculty Publications and Presentations

Livingstone's fruit bat (Pteropus livingstonii) is an endangered and endemic species found only on the islands of Anjouan and Mohéli, Comoros. A study was conducted into the habitats selected by P. livingstonii, as part of a project to assess areas for nature reserves which will be able to protect and conserve forest resources in the islands; the bat is postulated to be a useful indicator of undisturbed forest. Known roost sites (n=9) before the survey were between 500 and 1100 m altitude, on steeply sloping land, with some indigenous forest cover present. Thirteen new potential roost sites were identified, of …

Effects Of The 1997 Oakland Unified School District Black English Resolution, Kimberly Jo Johnson

Undergraduate Theses and Senior Projects

No abstract provided.

Survey Of Aquatic Plants In Corps Of Engineers Reservoirs, Kimberly D. Walker, Mark D. Sytsma

Center for Lakes and Reservoirs Publications and Presentations

A survey of aquatic plants in a selected Corps of Engineers reservoirs in Oregon was conducted. Cottage Grove, Dorena, Fern Ridge, Dexter and Willow Creek Reservoirs contained abundant aquatic plants. Potamogeton pectinatus and Potamogeton epihydrous were the most common native plant species. Myriophyllum aquaticum and Potamogeton crispus were the most widespread nonnative plants. Species richness in the reservoirs was correlated with trophic status and basin morphology. Shallow reservoirs that included extensive areas of nutrient-rich sediments that were historic flood plain soils supported the greatest biomass and number of species. Mesotrophic reservoirs had lower species diversity. Oligotrophic reservoirs with steep basin …

Target Language Avoidance By Thai Teachers Of English: Thai Teachers' Beliefs, Sasithorn Vacharaskunee

Theses: Doctorates and Masters

Interactionist theories of second language acquisition (SLA) claim that both comprehensible input and modified interaction in the target language are necessary for language learning. In the foreign language context, little opportunity exists for such input simply through exposure to the target language outside the classroom. Therefore, the quantity as well as quality of input within classrooms is especially important. However in spite of this fact many non-native teachers of second language, including English as a foreign language (EFL) teachers, tend to avoid using the target language in their classrooms. This has serious pedagogic implications. Thai teachers are typical of many …

M-Garch Hedge Ratios And Hedging Effectiveness In Australian Futures Markets, Wenling Yang

Theses: Doctorates and Masters

This study deals with the estimation of the optimal hedge ratios using various econometric models. Most of the recent papers have demonstrated that the conventional ordinary least squares (OLS) method of estimating constant hedge ratios is inappropriate, other more complicated models however seem to produce no more efficient hedge ratios. Using daily AOIs and SPI futures on the Australian market, optimal hedge ratios are calculated from four different models: the OLS regression model, the bivariate vector autoaggressive model (BVAR), the error-correction model (ECM) and the multivariate diagonal Vcc GARCH Model. The performance of each hedge ratio is then compared. The …

Phantom Classmates : A Case Study Of Talented Mathematics Students Learning Via Telematics, Leanne S. Clarke

Theses: Doctorates and Masters

The main advantages and disadvantages of the Telematics environment for talented mathematics students were investigated through a case study. The case study considered the interaction of, and opinions of 11 Year 9 students and the teacher/researcher. Participants were from nine schools in regional Western Australia, and were withdrawn from face-to-face classes to attend mathematics transmissions. Qualitative data were collected through student interviews, an anonymous questionnaire, tape recording of lessons, and teacher field notes. Students all agreed the main disadvantage occurred if timetabling for Telematics transmissions did not align with their local school class times for the same subject. The teacher …

An Examination Of The Impact Of Moon Phase On Catch Rates Of The Western Rock Lobster, Petra Roberts

Theses : Honours

The western rock lobster is the most valuable single-species fishery in Australia returning a commercial value of around $250 million annually. This fishery is considered fully exploited and requires careful management to ensure a viable and sustainable fishery. Scientists at Marine Research Laboratory, Western Australia have already built detailed computer models of the lobster fishery and further research is required to continuously update and refine these models to provide an accurate picture of the fishery. One area of interest that could improve this model is the impact of the moon phase, if any, on the daily catch rates of the …

Lower Secondary Student Attitudes Towards Social Studies In A Catholic School, Ekaterina Thiveos

Theses : Honours

This case study examined lower secondary student attitudes towards social studies and identified the factors that influenced attitudes in one Catholic secondary school located in the Perth metropolitan area. A total of 4 75 students were enrolled in Years 8 to 10 at the school in 1999. A modified version of Student Attitudes Towards Social Studies (Moroz 1996) questionnaire with 94 items, was utilised to gauge secondary student attitudes towards the learning area. A total of 421 lower secondary students participated in the survey. The data was analysed using the statistical software package SPSS 9. 0 for Windows, where descriptive …

Mapcast : Real-Time Collaboration With Concept Maps, Brett Greay

Theses : Honours

This thesis describes the development of the application mapCAST, a computer-based concept-mapping tool that allows synchronous collaboration via TCP/IP networks, such as the Internet The useability and feasibility of mapCAST as a computer-based tool was examined and analysed in a real world situation. Results indicate that mapCAST is successful as a collaborative tool in a situations involving knowledge organisation, but lacks certain functionality that many Macintosh users are accustomed to.

The Effects Of Conceptual Change On The Transfer Of Established Skills, John Forbes

Theses : Honours

When people practice a task, their performance in terms of speed and accuracy normally improves in a smooth manner that follows a power function. The consistency with which the performance of a wide range of skills conforms to this power function relationship is known as the Power Law of Learning, and has been an important assumption of many of the dominant theories of skill acquisition and transfer. As such, the form of the power function that is derived from the training process has been used to predict performance when task conditions remain constant. However, Speelman and Kirsner (under review) have …

Virtual Reality And The Modern Ideology Of Order And Control, Craig I. Murrihy

Theses : Honours

In this thesis I will examine the construction of the concept of Virtual Reality. I argue that rather than a technology of liberation as it is often perceived, virtual realities' conception has been influenced significantly by a discourse of control and order. I examine books, articles and films concerning Virtual Reality to support this claim. Furthermore this discourse of control and order is born out of a larger ideology of Western culture that values order and control. Throughout modernity this ideology has manifested itself through techniques and technologies of social and environmental control. I provide a brief historical outline highlighting …

An Investigation Of The Relationship Between Organisational Size And Industry Type With The Development And Use Of Executive Information Systems In The Manufacturing Sector, Nigel Warne

Theses: Doctorates and Masters

The purpose of this investigative research is to provide quantitative detail to better understand the development and use of Executive Information Sysytems (EIS) in the Australian Manufacturing sector. This investigation is an extension of previous research done on EIS in Australia (Prevan, 1992; Pervan and Phua, 1997) and looks more closely at the independent variables of organisation size and industry type in their relationaship with the development and use of EIS. A broad literature review provides a descriptive model that gives some insight into the development and use of EIS over more than fifteen years. Over eighty per cent of …

Intelligent Approaches To Vlsi Routing, Maolin Tang

Theses: Doctorates and Masters

Very Large Scale Integrated-circuit (VLSI) routing involves many large-size and complex problems and most of them have been shown to be NP-hard or NP-complete. As a result, conventional approaches, which have been successfully used to handle relatively small-size routing problems, are not suitable to be used in tackling large-size routing problems because they lead to 'combinatorial explosion' in search space. Hence, there is a need for exploring more efficient routing approaches to be incorporated into today's VLSI routing system. This thesis strives to use intelligent approaches, including symbolic intelligence and computational intelligence, to solve three VLSI routing problems: Three-Dimensional (3-D) …

The General Board Of Education In Western Australia 1847-1871: Its Establishment And Performance, Derek Jowle

Theses: Doctorates and Masters

This thesis is a history of the politics of education in nineteenth century Western Australia with a particular focus on educational administration. It traces the activities of the educational pioneers in Western Australia and in particular synthesises research material from a wide variety of sources to demonstrate and explain: •How and why these pioneers established an education system in Western Australia; •The difficulties faced by the pioneers and how they overcame those difficulties; •Why the General Board of Education ("the Board"), which was formed by the early pioneers, was established in 1847; •How and why the Board was terminated in …

The Effects Of The Provision Of An Interactive Teaching Program And Word Processors On The Writing Of Year 9 Students With Learning Disabilities, Cecily Cropley

Theses: Doctorates and Masters

Three male year nine students with learning disabilities were given an intervention program that involved use of a word processor to write science fiction stories. The program was conducted over a five-week period. The effects of the use of the word processor alone were compared to the effects of the provision of an interactive teaching course program in conjunction with a word processor. The treatment program was a single subject treatment design. One participant's writing improved to an equal extent whether or not an interactive teaching program was provided. A second participant's fluency, spelling and the number of unique words …