You are here
Search results
(21 - 40 of 994)
Pages
- Title
- GEOBIA for post-fire identification of jack pine saplings
- Creator
- Bomber, Michael Jeffrey
- Date
- 2018
- Collection
- Electronic Theses & Dissertations
- Description
-
Wildfire is a natural and necessary process which causes both devastation and regeneration to forested landscapes. One such event, the Duck Lake Fire, occurred in the Upper Peninsula (UP) of Michigan in the United States in 2012. The burn area is overseen by the Michigan Department of Natural Resources (MDNR) and encompasses approximately 8900 ha (21,000 acres) near the mouth of the Two Hearted River on the south shore of Lake Superior. After the fire, replanting by the MDNR and natural...
Show moreWildfire is a natural and necessary process which causes both devastation and regeneration to forested landscapes. One such event, the Duck Lake Fire, occurred in the Upper Peninsula (UP) of Michigan in the United States in 2012. The burn area is overseen by the Michigan Department of Natural Resources (MDNR) and encompasses approximately 8900 ha (21,000 acres) near the mouth of the Two Hearted River on the south shore of Lake Superior. After the fire, replanting by the MDNR and natural regeneration has taken place. Unmanned Aerial Systems (UAS) imagery of ten 1-ha study plots were collected via a MicaSense Red Edge camera simultaneously capturing images in the Red, Green, Blue, Red Edge and NIR bands. Images were collected at 60 meters altitude with platform velocity of 6 m/s. Geographic Object-Based Image Analysis (GEOBIA) in eCognnition Developer was conducted to assess the regrowth of jack pine in the Duck Lake forest and answer three questions: What is the level of accuracy that can be achieved via GEOBIA for detecting young jack pine saplings? How does the use of the Red Edge (RE) spectral band affect image classification accuracy? How does seasonal change affect the accuracy that can is achieved by the UAS and GEOBIA method? GEOBIA classification accuracies ranged from 59.5-97.5% with the NIR-R band combination performing the best overall and RE performing the worst. An overall increase in accuracy was observed as the season progressed with the highest average accuracy in time three (T3) at 78.4% across all bands.
Show less
- Title
- Exploring the role of hydrologic residence time and chemistry in the processing of nitrate at the sediment-water interface
- Creator
- Hampton, Tyler Barbee
- Date
- 2018
- Collection
- Electronic Theses & Dissertations
- Description
-
The concentrations of inorganic nitrogen, including nitrate (NO3-), are fundamental controls on the trophic state of aquatic ecosystems. Excess NO3- degrades drinking water quality, and therefore there is a need to understand processes that remove inorganic nitrogen. Controls on NO3- removal at the sediment-water interface (SWI) of aquatic ecosystems include both biogeochemical and hydrologic conditions, however the relative importance and interactions of these controls are poorly understood....
Show moreThe concentrations of inorganic nitrogen, including nitrate (NO3-), are fundamental controls on the trophic state of aquatic ecosystems. Excess NO3- degrades drinking water quality, and therefore there is a need to understand processes that remove inorganic nitrogen. Controls on NO3- removal at the sediment-water interface (SWI) of aquatic ecosystems include both biogeochemical and hydrologic conditions, however the relative importance and interactions of these controls are poorly understood. This thesis explores these controls on NO3- removal using a series of in-situ experiments involving both biogeochemical and hydrologic manipulations of the SWI in both lake and stream settings. Specifically, manipulative experiments altered dissolved organic carbon (DOC) and NO3- concentrations, as well as physical hydrologic residence times. The fate of NO3- in these manipulation experiments was traced by pairing isotopically labeled 15N-NO3- tracer experiments with controlled variable-head infiltrometer rings to isolate the sediment-water system and control the hydrology of the SWI. With these experiments, I was able to isolate biogeochemical versus hydrologic controls on rates of NO3- removal and denitrification rates. I found that increasing NO3- and DOC concentrations increased NO3- removal and denitrification rates in the SWI, but that increases in physical residence time had a stronger effect on increasing NO3- removal and denitrification rates, especially under conditions where DOC and NO3- availability were not limiting.
Show less
- Title
- Connecting the wrong dots : can thalamo-cortical dysconnectivity explain altered corollary discharge in schizophrenia?
- Creator
- Yao, Beier
- Date
- 2018
- Collection
- Electronic Theses & Dissertations
- Description
-
Corollary discharge (CD) signals are "copies" of motor signals sent to sensory areas to predict the impending input. Because they are used to distinguish actions generated by oneself versus external forces, altered CD has been hypothesized to result in the commonly-observed agency disturbances in schizophrenia patients (SZP). Behavioral evidence for altered CD in SZP has been observed in multiple sensorimotor domains, including the oculomotor system; however, its exact neural underpinning is...
Show moreCorollary discharge (CD) signals are "copies" of motor signals sent to sensory areas to predict the impending input. Because they are used to distinguish actions generated by oneself versus external forces, altered CD has been hypothesized to result in the commonly-observed agency disturbances in schizophrenia patients (SZP). Behavioral evidence for altered CD in SZP has been observed in multiple sensorimotor domains, including the oculomotor system; however, its exact neural underpinning is unknown. One oculomotor CD pathway identified in primates projects from motor neurons in the superior colliculus (SC) to visual neurons in the frontal eye fields (FEF) via the mediodorsal thalamus (MDT). The current study aimed to examine the structural connectivity of MDT-FEF pathway in SZP and whether it relates to oculomotor CD abnormalities. Twenty-four SZP and 22 healthy controls (HC) underwent diffusion tensor imaging (DTI), and a large subset of those individuals also performed the blanking task, an eye movement task that measures the influence of CD on visual perception. Probabilistic tractography was used to identify white matter tracts connecting FEF and MDT. Microstructural integrity of these tracts was compared across groups and correlated with behavioral indices of oculomotor CD from the blanking task and symptom severity. We found that SZP had compromised microstructural integrity in MDT-FEF pathway. This hypoconnectivity was correlated with both impaired oculomotor CD signals and more severe positive symptoms in SZP. These data suggest that the MDT-FEF pathway may serve an important role in transmitting oculomotor CD signals, which in turn may relate to positive symptom manifestation in SZP.
Show less
- Title
- Pot experiments with strawberries
- Creator
- Loree, R. E.
- Date
- 1925
- Collection
- Electronic Theses & Dissertations
- Title
- Studies on the Bermuda lily disease
- Creator
- Swartz, Delbert
- Date
- 1924
- Collection
- Electronic Theses & Dissertations
- Title
- The inheritance of white sheath in maize
- Creator
- Clark, Frank H.
- Date
- 1926
- Collection
- Electronic Theses & Dissertations
- Title
- Affective aesthetics and the social politics of Neoliberalism in New Extremism cinema
- Creator
- Clark, Cameron
- Date
- 2017
- Collection
- Electronic Theses & Dissertations
- Description
-
This thesis investigates the aesthetics of transgression in New Extremism cinema for the ways in which they inform, and are mutually informed by, neoliberal affect and social politics. Although negative affect and spectatorial embodiment are often central to critical discourse on New Extremism, this thesis instead attends to the interlocking aesthetic, narrative, and spatio-temporal expressions of affect as they correlate with neoliberal politics of respectability and reproduction. By...
Show moreThis thesis investigates the aesthetics of transgression in New Extremism cinema for the ways in which they inform, and are mutually informed by, neoliberal affect and social politics. Although negative affect and spectatorial embodiment are often central to critical discourse on New Extremism, this thesis instead attends to the interlocking aesthetic, narrative, and spatio-temporal expressions of affect as they correlate with neoliberal politics of respectability and reproduction. By deploying feminism and queer theory, this thesis locates positive, productive potentials within formal expressions of negative affect that mobilize a political critique of the violences within each film. In so doing, the selected film examples--Fabrice Du Welz's Calvaire (2004), Marina de Van's Dans ma peu (2002), Olivier Assayas's Demonlover (2002), Bruno Dumont's Twentynine Palms (2004), François Ozon's Criminal Lovers (2001), Alain Guiraudie's Stranger by the Lake (2014), to name a few--portray the shifting relations between politics, gender, and sexuality in the neoliberal present and offer critical alternatives for how such developments have impacted and impeded sociality.
Show less
- Title
- The relative value of raw rock phosphate & bone meal as source of calcium & phosphorus for lactating dairy cows
- Creator
- Jones, Wright B.
- Date
- 1925
- Collection
- Electronic Theses & Dissertations
- Title
- Automatic train control
- Creator
- Phippeny, F. I.
- Date
- 1926
- Collection
- Electronic Theses & Dissertations
- Title
- The electrolytic deposition of cadmium
- Creator
- Schmidt, Herbert William
- Date
- 1925
- Collection
- Electronic Theses & Dissertations
- Title
- A model poultry house for fifty hens
- Creator
- Krentel, Christian M.
- Date
- 1899
- Collection
- Electronic Theses & Dissertations
- Title
- Comparative tests on farm lighting plants
- Creator
- Hoffman, Howard V.
- Date
- 1920
- Collection
- Electronic Theses & Dissertations
- Title
- Seedling diseases of sugar beets
- Creator
- Stewart, Dewey
- Date
- 1924
- Collection
- Electronic Theses & Dissertations
- Title
- Some factors to consider in studying the fixation of phosphorous by soils
- Creator
- Weidemann, A. G. (Andrew G.,)
- Date
- 1926
- Collection
- Electronic Theses & Dissertations
- Title
- The centrifugal method of testing the consistency of concrete & comparison with the slump cone test
- Creator
- Williams, Chester I.
- Date
- 1924
- Collection
- Electronic Theses & Dissertations
- Title
- Instrument automation and measurement data curation platform for enhancing research reproducibility and knowledge discovery
- Creator
- Gtat, Yousef
- Date
- 2019
- Collection
- Electronic Theses & Dissertations
- Description
-
"Many applications demand the continued development of sensing systems that employ smart sensors, instrumentation circuits, and signal processing techniques to extract relevant information from real-world environments. In the engineering efforts to develop new sensors, tasks such as instrument automation, measurement process curation, real-time data acquisition, data analysis, and long-term tracking of inter-related datasets generate a significant volume and variety of information that is...
Show more"Many applications demand the continued development of sensing systems that employ smart sensors, instrumentation circuits, and signal processing techniques to extract relevant information from real-world environments. In the engineering efforts to develop new sensors, tasks such as instrument automation, measurement process curation, real-time data acquisition, data analysis, and long-term tracking of inter-related datasets generate a significant volume and variety of information that is challenging to organize, record, and analyze. Sensor development and characterization experiments can be laborious, prone to human error, difficult to repeat precisely, and can produce data that are challenging to interpret. Such issues highlight a need for a structured, automated approach to curate measurement processes and data acquisition. This thesis presents the first software platform for i) digitally designing measurement recipes, ii) remotely scheduling and monitoring experiment execution, iii) automatic data acquisition, iv) analyzing and storing results datasets, and v) linking the datasets with their prospective meta-datasets for deeper analysis and inspection. The proposed platform is flexible and capable of managing a large set of diverse instruments, measurement recipes and sensor datasets. By employing several design abstractions, it allows users to remotely design, schedule, monitor and execute measurement-based experiments while archiving results along with their information-rich metadata therefore preserving the provenance of the datasets. The platform enable precise timing control of instruments and stimulus signals along with long-term tracking of datasets eliminating manual errors and human omissions thus enhancing research reproducibility and promoting knowledge discovery methodologies."--Page ii.
Show less
- Title
- The consequences of authenticity and impression management in the context of taboo conversations
- Creator
- Bryant, Courtney M.
- Date
- 2018
- Collection
- Electronic Theses & Dissertations
- Description
-
"The current study integrates the construct of taboo into the organizational literature by considering its impact on coworker relationships, particularly in the context of authenticity and impression management. To explore how taboo topics may intrude on positive employee relationships, I consider its potential to impact helping behaviors in the workplace. An online between-subjects experiment manipulates motivation to be authentic or impression manage and a topic of discussion with a...
Show more"The current study integrates the construct of taboo into the organizational literature by considering its impact on coworker relationships, particularly in the context of authenticity and impression management. To explore how taboo topics may intrude on positive employee relationships, I consider its potential to impact helping behaviors in the workplace. An online between-subjects experiment manipulates motivation to be authentic or impression manage and a topic of discussion with a coworker to be taboo (e.g. abortion) or neutral (e.g. fitness). I evaluated participants' perceptions of their own motivation, participant's perceptions of their behavior during the interaction as authentic or impression management, and helping behaviors following the interaction. Results showed that motivation, but not taboo topics, influenced perceptions of behavior during the interaction. Further, taboo topics and the behavior during the interaction did not influence subsequent helping behaviors. However, exploratory results showed that taboo topics did impact affect towards the coworker that brought up the taboo topic. Limitations, implications for theory and practice, and future research directions are discussed."--Abstract.
Show less
- Title
- The marketing of butter
- Creator
- Lucas, Paul S.
- Date
- 1926
- Collection
- Electronic Theses & Dissertations
- Title
- Investigation of reinforced concrete dam on the Kalamazoo river at Ceresco, Mich
- Creator
- McDevitt, Justin J.
- Date
- 1909
- Collection
- Electronic Theses & Dissertations
- Title
- Further investigation of a kinetic model to accurately predict evaporation of gasoline
- Creator
- Eklund, Natasha Kimberley
- Date
- 2019
- Collection
- Electronic Theses & Dissertations
- Description
-
In fire debris analysis, analysts compare chromatograms of extracts of fire debris to a database containing chromatograms of ignitable liquid reference standards. Typically, the database will contain chromatograms of experimentally evaporated liquids. Unfortunately, experimentally evaporating ignitable liquids can be a time-consuming process. Previously, a mathematical model was developed with diesel that predicts the evaporation rate constant of compounds as a function of retention index (IT...
Show moreIn fire debris analysis, analysts compare chromatograms of extracts of fire debris to a database containing chromatograms of ignitable liquid reference standards. Typically, the database will contain chromatograms of experimentally evaporated liquids. Unfortunately, experimentally evaporating ignitable liquids can be a time-consuming process. Previously, a mathematical model was developed with diesel that predicts the evaporation rate constant of compounds as a function of retention index (IT). The model can be used to generate predicted chromatograms of evaporated liquids. In comparing predicted to experimental chromatograms, predictive accuracy was high for comparisons using diesel, torch fuel, and marine fuel stabilizer.This research aims to improve the predictive accuracy of the model with respect to gasoline and to test the feasibility of developing correlation coefficient ranges for the classification of an ignitable liquid residue as gasoline. Improvement of the predictive accuracy of the model involved changes to the instrumental parameters and data analysis procedures. The feasibility of development of PPMC coefficient ranges involved comparisons of predicted reference collections of a non-gasoline ignitable liquid to chromatograms of experimentally evaporated gasoline.
Show less