Hybrid electric vehicles (HEV’s) are a very important part of today’s transportation system as they are bridging the gap between fully electric vehicles and conventional internal combustion vehicles (ICV’s). They have much higher efficiencies and lower emissions than ICV’s, while still having the ability to travel long range and refuel...
As more advanced hybrid electric vehicles begin emerging onto the commercial market, design algorithms for their control become increasingly more complicated. One major hurdle for designers is the mitigation and control of the created high frequency harmonics caused from switching the dc voltage into an ac voltage by use of...
A significantly untapped renewable energy source exists in the world's oceans. It is estimated that if 0.2% of the ocean's untapped energy could be harnessed, it could provide power sufficient for the entire world. Ocean energy extraction is an old concept, and it is currently seeing the benefit of advancing...
The Great Recession, which resulted from the burst of housing bubble and officially lasted from December 2007 to June 2009, started as a national recession in the U.S. and then affected countries across the world. Economies reacted differently to this recession and those systems that lost fewer jobs and/or recovered...
This dissertation consists of three essays that collectively address the importance of accounting for spatial heterogeneity and spatial dependence of environmental assets and natural resources in policy making. The first essay examines the value of different wetland ecosystem services using an expanded meta-dataset of valuation studies in North America. The...
Urban gardens are uniquely positioned to support bee conservation. Gardens, when managed for pollinators, can provide food sources (pollen and nectar), nesting sites, and mating sites. Some bees (like sweat bees in the family Halictidae), are known to thrive in urban areas, we wanted to understand what types of bees...
A construction project is considered to be unique due to the process of delivering a customer-designed product, diverse stakeholders involved, the unique location and timeframe of construction, and specific social, economic, and environmental constraints attached to it. The uniqueness of construction projects brought great challenges to the construction industry professionals...
Published October 1939. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Hydraulic dredging is and most certainly will remain a primary
means of maintaining and improving ship channels and for land
reclamation in near-shore water. The study of which this thesis
describes a part is intended to develop a method of predetermining the
immediate disposition of sand spoils from hydraulic dredging...
The effect of primocane removal and training time on yield components and cold hardiness of 'Marion' trailing blackberry was studied. In 1991, primocanes were either not cut, or cut at ground level from plants on a single occasion at one month intervals from late April to late July. Four canes...
Quantitative assessments of post-fire effects are key to improving our understanding of ecosystem resilience. While remote sensing technology has allowed us to assess post-fire landscape effects, we are often limited by the lack of information related to pre-fire forest attributes. As a result, our ability to interpret fire effects in...
As the volume of genetic sequence data increases due to improved sequencing techniques and increased interest, the computational tools available to analyze the data are becoming inadequate. This thesis seeks to improve a few of the computational methods available to access and analyze data in the genetic sequence databases. The...
Analog-to-digital converters (ADCs) are the key building block for sensor applications, such as wireless communications and digital electronics. These applications require ADCs to have medium to high accuracy (normally from 10-14 bits) and relatively low signal bandwidth (ranging from 100Hz-150kHz). Since these applications are often powered by batteries, high power...
Channel maintenance operations in the rivers and harbors of the
United States annually require the disposal of over 320 million cubic
meters of dredge spoils. As the availability of suitable land sites
diminishes, open water disposal presents an attractive yet controversial
alternative method. For open water disposal to be acceptable,...
Most specifications for ready-mix concrete (RMC) limit mixing time to 90 minutes and/or truck drum revolution counts (DRC) to 300 before discharge. These specifications have been in place for many years with the objective of ensuring the quality and performance of the finished concrete product. However, limited research has been...
Oregon State University campus grounds have long been admired for their beauty and the diversity of over 65,000 individual woody plants that grace the 570 acres of campus. The woody plant collection has provided a living learning laboratory for the university and surrounding community for decades. The campus grounds include...
The mountain beaver is a medium-sized rodent of the western Pacific Northwest. Mountain beavers cause damage to forest regeneration by clipping or girdling seedlings or saplings or both, and undermining roots. Methods to control mountain beaver include trapping, toxicants, exclusion, repellents, and habitat modification. This publication describes and recommends a...
We examine the contribution of when-issued trading to price discovery and underpricing in the Indian IPO market. Besides the when-issued trading, there exists IPO grading, analyst recommendation, group affiliation, and the subscription rates in the bookbuilding process. We examine the impact of these activities and find three sequential factors that...