Comparing Properties of Pennycress and Lesquerella Presscake Biochars

Steve Peterson - Research Chemist at the USDA - ARS, Peoria, IL. Presscake is the term for the solid biomass left behind after the oil has been pressed out and extracted from an oilseed crop. In this study, two different oilseed feedstocks, pennycress and lesquerella, were examined as source material to prepare biochar for horticultural applications via gasification. In addition to comparing the two feedstocks (pennycress and lesquerella), we compared the biochar processing methods by running each feedstock in three slightly different TLUD gasifier designs as well as a retort furnace system with controlled temperature. Lesquerella biochar, produced by retort furnace at 500 and 600 °C, resulted in an unusually monodisperse pore size of approximately 2 nm; future work to potentially take advantage of this result will also be discussed.Ope

Understanding children\u27s thinking at the moment of writing

This action research project describes the thinking of five third grade students of varied writing achievement at the moment of writing. Using a theoretical model of writing (Sharples; 1999), student interviews, work samples, and a teacher journal, this study suggests that young writers\u27 primary concern is getting new ideas for their text, whether while just beginning to draft, or after running out of ideas before the writing is completed. This study offers suggestions about how teachers can address this concern, and how teachers might extend the thinking of young writers in order to help scaffold more complex thinking about writing in their students

Arrow 227: Air transport system design simulation

The Arrow 227 is a student-designed commercial transport for use in a overnight package delivery network. The major goal of the concept was to provide the delivery service with the greatest potential return on investment. The design objectives of the Arrow 227 were based on three parameters; production cost, payload weight, and aerodynamic efficiency. Low production cost helps to reduce initial investment. Increased payload weight allows for a decrease in flight cycles and, therefore, less fuel consumption than an aircraft carrying less payload weight and requiring more flight cycles. In addition, fewer flight cycles will allow a fleet to last longer. Finally, increased aerodynamic efficiency in the form of high L/D will decrease fuel consumption

Assessing the Risk of 100-year Freshwater Floods in the Lamprey River Watershed of New Hampshire Resulting from Changes in Climate and Land Use

What is the coastal resource issue the project sought to address? Both the magnitude and frequency of freshwater flooding is on the rise in seacoast NH and around much of New England. In the Great Bay watershed, this is the result of two primary causes: 1) increases in impervious surface stemming from a three-to-four fold increase in developed land since 1962; and 2) changing rainfall patterns in part exemplified by a doubling in the frequency of extreme weather events that drop more than 4 inches of precipitation in less than 48 hours (Wake et al., 2011) over the same time period. Moreover, the size of the 100-year precipitation event in this region has increased 26% from 6.3 inches to 8.5 inches from the mid 1950’s to 2010 (NRCC and NRCS, 2012). One consequence is the occurrence of three 100-year floods measured on the Lamprey River at Packers Falls since 1987, and a fourth if the three days of flooding in March of 2010 had occurred instead in two days (Figure 1). Flooding events are expected to continue to increase in magnitude and frequency as land in the watershed is further developed and climate continues to change in response to anthropogenic forcing (e.g., Hayhoe et el., 2007; IPCC, 2007; Karl et al., 2009). Land use management strategies, in particular low impact development (LID) zoning requirements, are one strategy that communities can employ for increased resiliency to flooding with the greatest influence in urban environments

Assessing the Risk of 100-year Freshwater Floods in the Lamprey River Watershed of New Hampshire Resulting from Changes in Climate and Land Use

What is the coastal resource issue the project sought to address? Both the magnitude and frequency of freshwater flooding is on the rise in seacoast NH and around much of New England. In the Great Bay watershed, this is the result of two primary causes: 1) increases in impervious surface stemming from a three-to-four fold increase in developed land since 1962; and 2) changing rainfall patterns in part exemplified by a doubling in the frequency of extreme weather events that drop more than 4 inches of precipitation in less than 48 hours (Wake et al., 2011) over the same time period. Moreover, the size of the 100-year precipitation event in this region has increased 26% from 6.3 inches to 8.5 inches from the mid 1950’s to 2010 (NRCC and NRCS, 2012). One consequence is the occurrence of three 100-year floods measured on the Lamprey River at Packers Falls since 1987, and a fourth if the three days of flooding in March of 2010 had occurred instead in two days (Figure 1). Flooding events are expected to continue to increase in magnitude and frequency as land in the watershed is further developed and climate continues to change in response to anthropogenic forcing (e.g., Hayhoe et el., 2007; IPCC, 2007; Karl et al., 2009). Land use management strategies, in particular low impact development (LID) zoning requirements, are one strategy that communities can employ for increased resiliency to flooding with the greatest influence in urban environments

Koinonia

The University as a Place of Spiritual Formation, Eugene Peterson and Steve Moore President\u27s Corner Into the Future: Highlights of the 1994 ACSD National Conference CoCCA: Community Service Finds Its Way into the Freshmen Orientation Program Thanks for the Memories & Much Morehttps://pillars.taylor.edu/acsd_koinonia/1034/thumbnail.jp

Insights from over 10 Years of Cellulosic Biofuel Modeling

We present insights gained from over 10 years of system dynamic modeling of the cellulose to biofuel industry in the United States. We use a publicly-available Biomass Scenario Model to explore the impact of logistics system, economies of scale, and shared industrial learning on the developing cellulose-to-biofuels industry in the United States. One theme from this study as well as from the work performed over the last decade is the importance of the movement of the system toward maturation, both in terms of the supply system and the conversion processes. Mature processes imply lower investment risk, better yields, and better process economics