OJS at Oregondigital.org (Oregon State University / University of Oregon)
Not a member yet
2079 research outputs found
Sort by
Measuring Performance at a Large Metropolitan Area: The Case of the DC (District of Columbia) Metroplex
Get PDFHierarchical linear models improve the measurement of performance when applied to a construct such as a metroplex. It compares the outcomes of a hierarchical linear model with those of a multiple regression model to evaluate whether meteorological conditions at individual airports and overall would explain variations in block delays. The study used the cases of the three largest airports in the DC Metroplex and concluded airborne delays had a significant random effect on block delays in spite of meteorological conditions at each airport. It pointed out that surface operations efficiency played a significant role in explaining variations in block delays
Optimizing Strategic Allocation of Vehicles for One-Way Car-sharing Systems Under Demand Uncertainty
Get PDFCar-sharing offers an environmentally sustainable, socially responsible and economically feasible mobility form in which a fleet of shared-use vehicles in a number of locations can be accessed and used by many people on as-needed basis at an hourly or mileage rate. To ensure its sustainability, car-sharing operators must be able to effectively manage dynamic and uncertain demands, and make the best decisions on strategic vehicle allocation and operational vehicle reallocation both in time and space to improve their profits while keeping costs under control. This paper develops a stochastic optimization method to optimize strategic allocation of vehicles for one-way car-sharing systems under demand uncertainty. A multi-stage stochastic linear programming model is developed and solved for use in the context of car-sharing. A seven-stage experimental network study is conducted. Numerical results and computational insights are discussed
Modeling Through Traffic Speed at Roundabouts Along Urban and Suburban Street Arterials
Get PDFA total of 30 roundabouts with different dimensions and characteristics were selected from three cities in Jordan. The collected data included the approaching road free flow speed (FFS), area type, entry width, circulating roadway width, exit width, roundabout internal and external circle diameters, circulating roadway super elevation, entry deviation angle, and drive curve. The regression analysis showed that the entry width, internal circulating diameter, entry deviation angle, approaching FFS, and drive curve were significant in determining the average and 85th percentile roundabout circulating speed. The developed model was compared with other international models developed in the United States and Italy
Road Supply in Central London: Addition of an Ignored Social Cost
Get PDFStudies examining the social cost of driving usually ignore the opportunity cost of having roads in place: the associated land rents. Especially for geographic regions where land is valuable, including the rent costs may even lead governments to close some roads. By using the London congestion charging zone case, a more general long-run social cost curve is calculated with the addition of the rents. Based on the optimal road usage concept, this study found that including the rents in the cost/benefit analysis significantly affects the results and can increase the social cost by up to 200% and decrease the optimal road usage by 40%
Specifying and Estimating a Regional Agricultural Railroad Demand Model
Get PDFIn recent years there have been few railroad demand studies. Also, no study has investigated the possibility of regional differences in railroad demand. The objective of the paper is to estimate railroad demand functions for wheat, corn, sorghum, and soybeans for the United States as well as the east and west regions. A two-region spatial equilibrium model is employed to specify the empirical model in which railroad tons originated is the dependent variable. The explanatory variables include railroad price per ton, crop production, and barge price per ton. The theoretically expected sign is negative for rail price. Alternatively, the expected sign is positive for crop production and barge rate. Results include estimates of railroad own-price elasticities and cross price elasticities relative to barge transport. The estimates also reveal regional differences in railroad grain demand
Say good-bye, Cy, to the Shores of Representation: Towards an Abstract Romanticism
Get PDFThis essay is concerned with the ways in which the works of Cy Twombly, especially those paintings that refer to and draw their impetus from the poetry of Shelley and Keats, elaborate an impulse towards abstraction already latent in Romanticism itself
From Anti-humanism to Post-humanism: Hermann Hesse's Steppenwolf
Get PDFHermann Hesse’s Steppenwolf (1927) can be regarded as a post-humanist novel for several reasons. It is post-humanist in a temporal sense because it engages with the nineteenth-century humanist legacy from a twentieth-century perspective. The novel’s brazen critique of traditional bourgeois values does not simply reject humanism and its philosophy of individual autonomy. It dislodges idealist concepts of wholeness and self-perfection and replaces them with a multi-perspectival view of a continuously changing human consciousness, an open-ended process toward an ever-elusive self-awareness. The protagonist of Hesse’s novel, Harry Haller, even though still heavily influenced by the humanist tradition, can no longer be viewed as a clearly defined individual personifying the Cartesian dichotomy of body and mind. On the contrary, Hesse’s novel depicts Haller’s gradual disillusionment with this idealist world view by giving a detailed account of the deconstruction of his personality – a personality that, as it turns out, does not consist of a spiritual essence but dissolves into an accumulation of acquired conventions, habits, cultural and philosophical traditions, even specific historical events and constellations. Yet Hesse’s attempt to go beyond a mere negation of humanist values implies transcending the humanist paradigm in many respects, including its form.
This essay will focus on the novel’s subversion of the humanist tradition. It discloses how Hesse’s novel undermines universalist philosophical claims, regardless of whether they belong to the idealist or anti-idealist Nietzschean philosophy that heavily influenced both the protagonist and his author. In light of the novel’s dismantling of binary reasoning, foregrounded in the protagonist’s man-animal division, the essay challenges conventional wisdom among critics who regard Hesse’s literary works as traditionalist