Reverse osmosis (RO) is being increasingly used in treatment of domestic
wastewater secondary effluent for potable and non-potable reuse. Among other
foulants, dissolved biopolymers, i.e., proteins and polysaccharides, can lead to
severe fouling of RO membranes. In this study, the roles of RO membrane surface
properties in membrane fouling by...
The LRFR Manual, within commentary Article C6.4.4.2.3, contains provisions for development of site-specific live load factors. In Oregon, truck Weigh-in-Motion (WIM) data were used to develop live load factors for use on state-owned bridges. The factors were calibrated using the same statistical methods that were used in the original development...
The Forest Homestead Act of 1906 precipitated one of the final rushes for free
land in American history. A nascent land management agency, the USDA Forest
Service, created a systematized process for the review and documentation of purported
forest homestead claims. One hundred years later, the forest-homestead examination
files of...
Between 1927 and 1930 the Nevada Contracting Company of Fallon, Nevada constructed the Zion Tunnel and a portion of the Zion-Mt. Carmel Highway in Zion National Park, Utah. During the construction approximately 200 workers lived at the contractor's camp, known today as the Nevada Camp. This camp, a temporary work...
The purpose of this research study was to test a psychological theory of motivation called the Flow Theory by Csikszentmihalyi as it relates to non-industrial textile production activities. In using the Flow Theory, researchers attempt to explain why individuals continue participation with a specific activity; namely that the activity induces...
The microbial loop plays a crucial role in remineralization of organic matter and fuels recycled production in the aquatic environment. The capability of microbes to utilize particular compounds can be examined through their ectoenzyme (found outside the cell) activities using fluorogenic substrate analogs. These catalysts hydrolyze polymers otherwise too large...
Heavy timber framing relies primarily on bracing to withstand lateral loads due to earthquakes and wind events. Bracing configurations in heavy timber framed buildings vary widely and include cross bracing, knee bracing, and other geometries. Many heavy timber frames constructed during colonial American times are still standing, exceeding the expected...