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Integration Of A Cob Separation System Into A Biomass Harvesting Combine, Jeremiah Kingsley Johnson 2010 Iowa State University

Integration Of A Cob Separation System Into A Biomass Harvesting Combine, Jeremiah Kingsley Johnson

Graduate Theses and Dissertations

Before the invention of a combine harvester, corn was picked on the ear and threshed later. This led to an availability of corn cobs and many uses were found. A renewed interest in the heat/energy value of the cob has increased the focus on harvesting corn cobs. A corn cob separation system was developed and installed on a single pass biomass harvesting combine. The system included a blower and two fans and the combine was capable of harvesting grain only, grain and stover, and grain and cobs. The cob separation system was evaluated using a stationary test with earcorn ...


Integrated Retail And Wholesale Power System Operation With Smart-Grid Functionality, Dionysios C. Aliprantis, Scott Penick, Leigh Tesfatsion 2010 Iowa State University

Integrated Retail And Wholesale Power System Operation With Smart-Grid Functionality, Dionysios C. Aliprantis, Scott Penick, Leigh Tesfatsion

Economics Presentations, Posters and Proceedings

Our research team is developing an agent-based test bed for the integrated study of retail and wholesale power markets operating over transmission and distribution networks with smart-grid functionality. This test bed seams together two existing test beds, the AMES Wholesale Power Market Test Bed and the GridLAB-D distribution platform. As a first step, we have designed an integrated retail/wholesale market module specifically based on the ERCOT (Texas) energy region, and we are using simplified versions of this module to study potential retail consumer response to real-time-pricing contracts supported by advanced metering. This study reports on the latter work.


Drainage Water Quality Impacts Of Agricultural Management Practices, Matthew J. Helmers, Ramesh S. Kanwar, Antonio P. Mallarino 2010 Iowa State University

Drainage Water Quality Impacts Of Agricultural Management Practices, Matthew J. Helmers, Ramesh S. Kanwar, Antonio P. Mallarino

Leopold Center Completed Grant Reports

Investigators analyzed the impacts of liquid swine manure application, tillage, rotation and cover crops on dissolved nutrient loss in subsurface drainage. The project took place at the ISU Northeast Research Farm near Nashua. Tile drainage water samples were collected weekly for nitrate and dissolved-reactive P analysis during 2009 and 2010. Nitrate-N concentrations were highest under continuous corn receiving swine manure every year compared to other treatments. Corn-soybean rotations that received manure only before corn had lower nitrate-N concentrations compared to corn-soybean rotations that received manure before both crops. During these three years, which were not ideal for cover crop growth ...


How Does Dew Affect L–Band Backscatter? Analysis Of Pals Data At The Iowa Validation Site And Implications For Smap, Brian K. Hornbuckle, Tracy L. Rowlandson, Eric S. Russell, Amy L. Kaleita, Sally D. Logsdon, Anton Kruger, Simon Yueh, Roger De Roo 2010 Iowa State University

How Does Dew Affect L–Band Backscatter? Analysis Of Pals Data At The Iowa Validation Site And Implications For Smap, Brian K. Hornbuckle, Tracy L. Rowlandson, Eric S. Russell, Amy L. Kaleita, Sally D. Logsdon, Anton Kruger, Simon Yueh, Roger De Roo

Agronomy Conference Proceedings and Presentations

NASA's Soil Moisture Active Passive satellite mission will use both an L-band radiometer and radar to produce global-scale measurements of soil moisture. L-band backscatter is also sensitive to the water content of vegetation. We found that a moderate dew increased the L-band backscatter of a soybean canopy by 1 dB. Dew thus has the potential to add error to satellite observations of soil moisture.


Corncob Dry Matter Loss In Storage As Affected By Temperature And Moisture Content, Bernardo Gusman Del Campo 2010 Iowa State University

Corncob Dry Matter Loss In Storage As Affected By Temperature And Moisture Content, Bernardo Gusman Del Campo

Graduate Theses and Dissertations

Agricultural residues, like corn cobs, are one of the first promising cellulosic materials to be fermented and thermochemically processed into fuel in the emerging bio-based economy. Few studies have been conducted on the deterioration of cellulosic feedstock in storage. This study measured the loss of corn cob dry matter, as measured by carbon dioxide evolution, under various storage conditions (temperature and moisture content) for 21 days. High moisture content and temperature conditions (35% w.b. and 30yC) resulted in almost 3 % dry matter loss in 21days, as opposed to negligible losses at drier conditions (15% w.b.). There was a ...


Ag Engineering/Agronomy Farm And Central Iowa Farms Summary, Michael W. Fiscus, David Starrett, Richard D. Vandepol, Kent R. Berns 2010 Iowa State University

Ag Engineering/Agronomy Farm And Central Iowa Farms Summary, Michael W. Fiscus, David Starrett, Richard D. Vandepol, Kent R. Berns

Iowa State Research Farm Progress Reports

Contains:

Ag Engineering and Agronomy Farm Farm and Weather Summary

Central Iowa Farms Farm and Weather Summary

Project List


Corn Harvest And Nutrient Management Systems Impacts On Phosphorus Loss With Surface Runoff, Antonio P. Mallarino, Aaron Alan Andrews, Mazhar Ul Haq, Matthew J. Helmers 2010 Iowa State University

Corn Harvest And Nutrient Management Systems Impacts On Phosphorus Loss With Surface Runoff, Antonio P. Mallarino, Aaron Alan Andrews, Mazhar Ul Haq, Matthew J. Helmers

Iowa State Research Farm Progress Reports

Cellulosic biomass is being promoted for use in future bioenergy production systems as a better alternative to current grain-based systems. Cropping systems and partial or total corn biomass removal in addition to grain harvest changes crop P needs, crop residue, and P recycling.Both sediment and water losses may also be altered and these changes could result in increased P loss from fields. Livestock production results in the generation of large quantities of manure that is a valuable nutrient source for producing high biomass yield. Manure can be used to minimize use of inorganic fertilizers and enhance production efficiency. Therefore ...


Spatio-Temporal Patterns Of Field-Scale Soil Moisture And Their Implications For In Situ Soil Moisture Network Design, Lingyuan Yang 2010 Iowa State University

Spatio-Temporal Patterns Of Field-Scale Soil Moisture And Their Implications For In Situ Soil Moisture Network Design, Lingyuan Yang

Graduate Theses and Dissertations

This dissertation describes efforts to overcome the challenges in designing in situ soil moisture observation network. The surface soil moisture data collected at two spatial scales in a working field in Iowa throughout the growing seasons in 2004 to 2008 were used to describe the spatio-temporal characteristics of soil moisture at field scale. The rank stability analysis was used to identify the locations on the ground to represent the mean soil moisture at the field scale across five different growing seasons. Optimal sampling locations (OSLs), giving accurate estimates of field mean soil moisture for each season, were selected using the ...


Measurement Of Soil-Tire Interface Stresses, Jonathan Tate Roth 2010 Iowa State University

Measurement Of Soil-Tire Interface Stresses, Jonathan Tate Roth

Graduate Theses and Dissertations

Agricultural energy usage is an important topic among agricultural industry producers, manufacturers and regulators. Zoz and Grisso (2003) stated that prior research shows between 20 and 55% of tractor energy is lost at the soil-tire interface. This transfer of power between axle and drawbar has been identified as one of the greatest inefficiencies in agricultural field operations. Understanding the stresses at the soil-tire interface would provide insight into the current state of tire traction development, data for soil-tire interface discrete and finite-element models, and information for future tire designs.

This paper presents a measurement system to quantify the shear and ...


Impedance Spectroscopy Of Batio₃ Cubes Suspended In Lossy Liquids As A Physical Model Of Two-Phase System, Piotr Z. Jasinski, Vladimir Petrovsky, Fatih Dogan 2010 Missouri University of Science and Technology

Impedance Spectroscopy Of Batio₃ Cubes Suspended In Lossy Liquids As A Physical Model Of Two-Phase System, Piotr Z. Jasinski, Vladimir Petrovsky, Fatih Dogan

Materials Science and Engineering Faculty Research & Creative Works

Impedance spectroscopy techniques were used for analysis of the physical model in a two-phase system toward determining of dielectric constant of dielectric particles suspended in liquids at various solids loading (volume fraction) levels. Model experimental studies were conducted using BaTiO3 as a dielectric material that was prepared as small cubes of uniform size (2×2×1 mm). Barium titanate (BT) cubes having a dielectric constant of 3850 were immersed in liquids of low dielectric constant and moderate electrical conductivity. Measured impedance spectra consisted of two semicircles, which were fitted for (R∥C)(R∥C) equivalent circuit. The parameters obtained from ...


Automatic Utility Meter Reading, Kaicheng Xie 2010 Cleveland State University

Automatic Utility Meter Reading, Kaicheng Xie

ETD Archive

This thesis discusses research in the automation of reading a utility meter. The hardware required is a wireless camera pointed at the meter to be read. This meter can be a water, electricity or gas meter. After the wireless camera collects the image from the utility meter it transmits the image to a computer through a receiver. The computer analyzes the image with pattern recognition technology to obtain the numbers. We use image processing techniques in this thesis, including image preprocessing, image segmentation (Otsu threshold method), and number recognition. Finally we create a graphical user interface using Visual C#®


Identification Of Unmodeled Dynamics In Rotor Systems Using Mu-Synthesis Approach, Ryan J. Madden 2010 Cleveland State University

Identification Of Unmodeled Dynamics In Rotor Systems Using Mu-Synthesis Approach, Ryan J. Madden

ETD Archive

It is well recognized that analytical models only approximate the true dynamics of analyzed rotating machines, due to the presence of components that are inherently difficult to model. Such models of rotating machines are driven by the best engineering knowledge and experience, and very often are updated based on experimental results. The problem of unmodeled or missing dynamics can be exacerbated in the presence of rotor structural damage such as a transverse crack on a shaft. This thesis will present an effective approach for model updating using advanced tools developed in robust control theory, specifically mu-synthesis. The methodology will be ...


Freeform Reflector Design With Extended Sources, Florian Fournier 2010 University of Central Florida

Freeform Reflector Design With Extended Sources, Florian Fournier

Electronic Theses and Dissertations

Reflector design stemmed from the need to shape the light emitted by candles or lamps. Over 2,000 years ago people realized that a mirror shaped as a parabola can concentrate light, and thus significantly boosts its intensity, to the point where objects can be set afire. Nowadays many applications require an accurate control of light, such as automotive headlights, streetlights, projection displays, and medical illuminators. In all cases light emitted from a light source can be shaped into a desired target distribution with a reflective surface. Design methods for systems with rotational and translational symmetry were devised in the ...


Accelerating Optical Airy Beams, Georgios Siviloglou 2010 University of Central Florida

Accelerating Optical Airy Beams, Georgios Siviloglou

Electronic Theses and Dissertations

Over the years, non-spreading or non-diffracting wave configurations have been systematically investigated in optics. Perhaps the best known example of a diffraction-free optical wave is the so-called Bessel beam, first suggested and observed by Durnin et al. This work sparked considerable theoretical and experimental activity and paved the way toward the discovery of other interesting non-diffracting solutions. In 1979 Berry and Balazs made an important observation within the context of quantum mechanics: they theoretically demonstrated that the Schrodinger equation describing a free particle can exhibit a non-spreading Airy wavepacket solution. This work remained largely unnoticed in the literature-partly because such ...


Computational Complexity Of Signal Processing Functions In Software Radio, Kushal Y. Shah 2010 Cleveland State University

Computational Complexity Of Signal Processing Functions In Software Radio, Kushal Y. Shah

ETD Archive

The increased usage of mobile communication devices has imposed a challenge of achieving efficient communication with minimum power consumption. Moreover, with the advent of software defined radios (SDR), it is highly possible that signal processing functions would be implemented in software in future mobile devices. Hence, the power consumption of these future devices will be directly related to the power consumed by the processor that executes SDR software. This thesis aims at analyzing the computational complexity of different modulation schemes and signal processing communication functions of IEEE WiFi standard. This analysis provides good insight on how the computational load varies ...


Dc-Dc Power Converter Design For Application In Welding Power Source For The Retail Market, Edward J. Oshaben 2010 Cleveland State University

Dc-Dc Power Converter Design For Application In Welding Power Source For The Retail Market, Edward J. Oshaben

ETD Archive

The purpose of this study is to design and analyze a DC-DC power converter for application in a welding power source that is cost-competitive with the more traditional, lower-tech welding power source topologies. This thesis first presents a background study of recent design approaches to DC-DC power converters, as they relate to application in welding power converters. The background study also surveys recent design approaches to welding power source controls. Evaluation of available options in DC-DC converter topologies and switching schemes for application in a welding power source is presented. Design methodology of a low-cost DC-DC converter for application in ...


Implementation And Evaluation Of A Tdma Based Protocol For Wireless Sensor Networks, Robert M. Fiske 2010 Cleveland State University

Implementation And Evaluation Of A Tdma Based Protocol For Wireless Sensor Networks, Robert M. Fiske

ETD Archive

When evaluating MAC layer network protocols for wireless sensor networks performing simulations of a protocol's operation can provide great insight into the performance of the protocol. In order to prove that a protocol will work in a real setting and not just at the theoretical level, however, there is no substitute for evaluation with a physical implementation. This thesis discusses a physical implementation and evaluation of the Many-to-One-Sensor-to-Sink (MOSS) MAC layer protocol for sink based wireless sensor networks using the MAC Layer Architecture for TinyOS. MOSS is a Time Division Multiple Access (TDMA) based protocol first proposed in an ...


Thermal Analysis Of Natural Convectiona And Radiation In Porous Fins, Mehulkumar G. Maheria 2010 Cleveland State University

Thermal Analysis Of Natural Convectiona And Radiation In Porous Fins, Mehulkumar G. Maheria

ETD Archive

No abstract provided.


Analyzing Instructtion Based Cache Replacement Policies, Ping Xiang 2010 University of Central Florida

Analyzing Instructtion Based Cache Replacement Policies, Ping Xiang

Electronic Theses and Dissertations

The increasing speed gap between microprocessors and off-chip DRAM makes last-level caches (LLCs) a critical component for computer performance. Multi core processors aggravate the problem since multiple processor cores compete for the LLC. As a result, LLCs typically consume a significant amount of the die area and effective utilization of LLCs is mandatory for both performance and power efficiency. We present a novel replacement policy for last-level caches (LLCs). The fundamental observation is to view LLCs as a shared resource among multiple address streams with each stream being generated by a static memory access instruction. The management of LLCs in ...


Establishing Degradation Rates And Service Lifetime Of Photovoltaic Systems, Albert Leyte-Vidal 2010 University of Central Florida

Establishing Degradation Rates And Service Lifetime Of Photovoltaic Systems, Albert Leyte-Vidal

Electronic Theses and Dissertations

As fossil fuel sources continue to diminish, oil prices continue to increase, and global warming and CO2 emissions keep impacting the environment, it has been necessary to shift energy consumption and generation to a different path. Solar energy has proven to be one of the most promising sources of renewable energy because it is environmentally friendly, available anywhere in the world, and cost competitive. For photovoltaic (PV) system engineers, designing a PV system is not an easy task. Research demonstrates that different PV technologies behave differently under certain conditions; therefore energy production varies not only with capacity of the system ...


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