Exhibits

The Finnish American Heritage Center at Finlandia University recently installed three exhibits. They include a photographic exhibit titled “Rural Reflections: Finnish American Buildings and Landscapes in Michigan’s Copper Country”; a historic photography exhibit named “People, Place and Time: Michigan’s Copper Country Through the Lens of J.W. Nara”; and a pair of lithographs acquired by the National Park Service which were on either side of the Italian Hall stage the night of the infamous Christmas Eve tragedy 100 years ago. The “Rural Reflections” exhibit documents the built environment that Finnish immigrants and their descendants created in Michigan's Copper Country from the 1880s through the 1930s. Although much of this heritage has been lost with the passage of time, the district yet holds one of the largest concentrations of rural Finnish buildings and cultural landscapes in North America. The Nara exhibit, funded in part by descendants Robert and Ruth Nara of Bootjack Michigan, works from historical photographs held at the Michigan Tech Archives. Interpretive panels highlight the people, places, and times that J.W. Nara experienced during his lifetime and include material on urban life, farming, and the 1913 Michigan copper miners’ strike. The lithographs are a recent and unique acquisition for the Keweenaw National Historical Park, and will be on protected display at the FAHC. One of the panels shows the Italian royal family and was produced in 1908, while the other, produced in 1905, is of the five founders of the modern Italian state. For more information about the exhibits at the Finnish American Heritage Center, call (906) 487-7302.

Exhibits

The Finnish American Heritage Center at Finlandia University recently installed three exhibits. They include a photographic exhibit titled “Rural Reflections: Finnish American Buildings and Landscapes in Michigan’s Copper Country”; a historic photography exhibit named “People, Place and Time: Michigan’s Copper Country Through the Lens of J.W. Nara”; and a pair of lithographs acquired by the National Park Service which were on either side of the Italian Hall stage the night of the infamous Christmas Eve tragedy 100 years ago. The “Rural Reflections” exhibit documents the built environment that Finnish immigrants and their descendants created in Michigan's Copper Country from the 1880s through the 1930s. Although much of this heritage has been lost with the passage of time, the district yet holds one of the largest concentrations of rural Finnish buildings and cultural landscapes in North America. The Nara exhibit, funded in part by descendants Robert and Ruth Nara of Bootjack Michigan, works from historical photographs held at the Michigan Tech Archives. Interpretive panels highlight the people, places, and times that J.W. Nara experienced during his lifetime and include material on urban life, farming, and the 1913 Michigan copper miners’ strike. The lithographs are a recent and unique acquisition for the Keweenaw National Historical Park, and will be on protected display at the FAHC. One of the panels shows the Italian royal family and was produced in 1908, while the other, produced in 1905, is of the five founders of the modern Italian state. For more information about the exhibits at the Finnish American Heritage Center, call (906) 487-7302.

Exhibits

The Finnish American Heritage Center at Finlandia University recently installed three exhibits. They include a photographic exhibit titled “Rural Reflections: Finnish American Buildings and Landscapes in Michigan’s Copper Country”; a historic photography exhibit named “People, Place and Time: Michigan’s Copper Country Through the Lens of J.W. Nara”; and a pair of lithographs acquired by the National Park Service which were on either side of the Italian Hall stage the night of the infamous Christmas Eve tragedy 100 years ago. The “Rural Reflections” exhibit documents the built environment that Finnish immigrants and their descendants created in Michigan's Copper Country from the 1880s through the 1930s. Although much of this heritage has been lost with the passage of time, the district yet holds one of the largest concentrations of rural Finnish buildings and cultural landscapes in North America. The Nara exhibit, funded in part by descendants Robert and Ruth Nara of Bootjack Michigan, works from historical photographs held at the Michigan Tech Archives. Interpretive panels highlight the people, places, and times that J.W. Nara experienced during his lifetime and include material on urban life, farming, and the 1913 Michigan copper miners’ strike. The lithographs are a recent and unique acquisition for the Keweenaw National Historical Park, and will be on protected display at the FAHC. One of the panels shows the Italian royal family and was produced in 1908, while the other, produced in 1905, is of the five founders of the modern Italian state. For more information about the exhibits at the Finnish American Heritage Center, call (906) 487-7302.

Characterization of legacy organic carbon in a culturally eutrophic lake : the role of the historic carbon deposition in the time course and extent of lake recovery

The time course of lake recovery after a reduction in external loading of nutrients is often controlled by conditions in the sediment. Remediation of eutrophication is hindered by the presence of legacy organic carbon deposits, that exert a demand on the terminal electron acceptors of the lake and contribute to problems such as internal nutrient recycling, absence of sediment macrofauna, and flux of toxic metal species into the water column. Being able to quantify the timing of a lake’s response requires determination of the magnitude and lability, i.e., the susceptibility to biodegradation, of the organic carbon within the legacy deposit. This characterization is problematic for organic carbon in sediments because of the presence of different fractions of carbon, which vary from highly labile to refractory. The lability of carbon under varied conditions was tested with a bioassay approach. It was found that the majority of the organic material found in the sediments is conditionally-labile, where mineralization potential is dependent on prevailing conditions. High labilities were noted under oxygenated conditions and a favorable temperature of 30 °C. Lability decreased when oxygen was removed, and was further reduced when the temperature was dropped to the hypolimnetic average of 8° C . These results indicate that reversible preservation mechanisms exist in the sediment, and are able to protect otherwise labile material from being mineralized under in situ conditions. The concept of an active sediment layer, a region in the sediments in which diagenetic reactions occur (with nothing occurring below it), was examined through three lines of evidence. Initially, porewater profiles of oxygen, nitrate, sulfate/total sulfide, ETSA (Electron Transport System Activity- the activity of oxygen, nitrate, iron/manganese, and sulfate), and methane were considered. It was found through examination of the porewater profiles that the edge of diagenesis occurred around 15-20 cm. Secondly, historical and contemporary TOC profiles were compared to find the point at which the profiles were coincident, indicating the depth at which no change has occurred over the (13 year) interval between core collections. This analysis suggested that no diagenesis has occurred in Onondaga Lake sediment below a depth of 15 cm. Finally, the time to 99% mineralization, the t99, was viewed by using a literature estimate of the kinetic rate constant for diagenesis. A t99 of 34 years, or approximately 30 cm of sediment depth, resulted for the slowly decaying carbon fraction. Based on these three lines of evidence , an active sediment layer of 15-20 cm is proposed for Onondaga Lake, corresponding to a time since deposition of 15-20 years. While a large legacy deposit of conditionally-labile organic material remains in the sediments of Onondaga Lake, it becomes clear that preservation, mechanisms that act to shield labile organic carbon from being degraded, protects this material from being mineralized and exerting a demand on the terminal electron acceptors of the lake. This has major implications for management of the lake, as it defines the time course of lake recovery following a reduction in nutrient loading.

Integrated solar energy and absorption cooling model for HVAC (heating, ventilating, and air conditioning) applications in buildings

The demands in production and associate costs at power generation through non renewable resources are increasing at an alarming rate. Solar energy is one of the renewable resource that has the potential to minimize this increase. Utilization of solar energy have been concentrated mainly on heating application. The use of solar energy in cooling systems in building would benefit greatly achieving the goal of non-renewable energy minimization. The approaches of solar energy heating system research done by initiation such as University of Wisconsin at Madison and building heat flow model research conducted by Oklahoma State University can be used to develop and optimize solar cooling building system. The research uses two approaches to develop a Graphical User Interface (GUI) software for an integrated solar absorption cooling building model, which is capable of simulating and optimizing the absorption cooling system using solar energy as the main energy source to drive the cycle. The software was then put through a number of litmus test to verify its integrity. The litmus test was conducted on various building cooling system data sets of similar applications around the world. The output obtained from the software developed were identical with established experimental results from the data sets used. Software developed by other research are catered for advanced users. The software developed by this research is not only reliable in its code integrity but also through its integrated approach which is catered for new entry users. Hence, this dissertation aims to correctly model a complete building with the absorption cooling system in appropriate climate as a cost effective alternative to conventional vapor compression system.

EXHAUST EMISSIONS OF LOW LEVEL BLEND ALCOHOL FUELS FROM TWO-STROKE AND FOUR-STROKE MARINE ENGINES

The U.S. Renewable Fuel Standard mandates that by 2022, 36 billion gallons of renewable fuels must be produced on a yearly basis. Ethanol production is capped at 15 billion gallons, meaning 21 billion gallons must come from different alternative fuel sources. A viable alternative to reach the remainder of this mandate is iso-butanol. Unlike ethanol, iso-butanol does not phase separate when mixed with water, meaning it can be transported using traditional pipeline methods. Iso-butanol also has a lower oxygen content by mass, meaning it can displace more petroleum while maintaining the same oxygen concentration in the fuel blend. This research focused on studying the effects of low level alcohol fuels on marine engine emissions to assess the possibility of using iso-butanol as a replacement for ethanol. Three marine engines were used in this study, representing a wide range of what is currently in service in the United States. Two four-stroke engine and one two-stroke engine powered boats were tested in the tributaries of the Chesapeake Bay, near Annapolis, Maryland over the course of two rounds of weeklong testing in May and September. The engines were tested using a standard test cycle and emissions were sampled using constant volume sampling techniques. Specific emissions for two-stroke and four-stroke engines were compared to the baseline indolene tests. Because of the nature of the field testing, limited engine parameters were recorded. Therefore, the engine parameters analyzed aside from emissions were the operating relative air-to-fuel ratio and engine speed. Emissions trends from the baseline test to each alcohol fuel for the four-stroke engines were consistent, when analyzing a single round of testing. The same trends were not consistent when comparing separate rounds because of uncontrolled weather conditions and because the four-stroke engines operate without fuel control feedback during full load conditions. Emissions trends from the baseline test to each alcohol fuel for the two-stroke engine were consistent for all rounds of testing. This is due to the fact the engine operates open-loop, and does not provide fueling compensation when fuel composition changes. Changes in emissions with respect to the baseline for iso-butanol were consistent with changes for ethanol. It was determined iso-butanol would make a viable replacement for ethanol.

A STUDY OF THE IMPACTS OF FREEZE-THAW ON CLIFF RECESSION AT THE CALVERT CLIFFS IN CALVERT COUNTY, MARYLAND

The Calvert Cliffs, which form much of the western coastline of the Chesapeake Bay in Calvert County, Maryland, are actively eroding and destabilizing, resulting in a critical situation for many homes in close proximity to the slope's crest. Past studies have identified that where waves directly interact with the toe of the slope, wave action controls cliff recession; however, where waves do not regularly interact with the slope toe, the past work identified that freeze-thaw controls recession. This study investigated the validity of this second claim by analyzing the recession rate and freeze-thaw behavior of six study sites along the Calvert Cliffs that are not directly affected by waves. While waves do remove failed material from the toe, in these regions freeze-thaw is believed to be the dominant factor driving recession at the Calvert Cliffs. Past recession rates were calculated using historical aerial photographs and were analyzed together with a number of other variables selected to represent the freeze-thaw behavior of the Calvert Cliffs. The investigation studied sixteen independent variables and found that over 65% of recession at these study sites can be represented by the following five variables: (1) cliff face direction, (2 and 3) the percent of total cliff height composed of soil with freeze-thaw susceptibility F4 and F2, (4) the number of freeze-thaw cycles, and (5) the weighted shear strength. Future mitigation techniques at these sites should focus on addressing these variables and might include vegetation or addressing the presence of water along the face of the slope. Unmitigated, the Calvert Cliffs will continue to recede until a stable slope angle is reached and maintained.

EXTRACTION OF PICTORIAL ENERGY INFORMATION FROM CAMPUS UNMETERED BUILDINGS USING IMAGE PROCESSING TECHNIQUES

In recent years, advanced metering infrastructure (AMI) has been the main research focus due to the traditional power grid has been restricted to meet development requirements. There has been an ongoing effort to increase the number of AMI devices that provide real-time data readings to improve system observability. Deployed AMI across distribution secondary networks provides load and consumption information for individual households which can improve grid management. Significant upgrade costs associated with retrofitting existing meters with network-capable sensing can be made more economical by using image processing methods to extract usage information from images of the existing meters. This thesis presents a new solution that uses online data exchange of power consumption information to a cloud server without modifying the existing electromechanical analog meters. In this framework, application of a systematic approach to extract energy data from images replaces the manual reading process. One case study illustrates the digital imaging approach is compared to the averages determined by visual readings over a one-month period.