197,224 research outputs found
Fort McHenry, Baltimore, Maryland, circa 1901-1907
No full textFort McHenry, Baltimore, Maryland, circa 1901-1907. Postmark date: June 18, 1906; Postcard number: 14; Message included. View of Fort McHenry across Baltimore harbor
Technical, mitigation, and financial comparisons of 6kWe grid-connected and stand-alone wood gasifiers, versus mineral diesel and biodiesel generation for rural distributed generation
No full textThis research presents a technical simulation and economic model of three small-scale technical alternatives supplying a typical rural homestead electricity load: a 15 kVA wood gasification unit coupled to a 6 kW e modified grid-connected petrol generator; the same system operating as a stand-alone system, and; a 6 kW e diesel generator, all modelled against the electricity network in the southwest (SW) of Western Australia (WA). The three technical alternatives are supplemented by a further four comparative scenarios, including zero woodgas fuel and labour costs, generous capital and feed-in-tariff subsidies, and also the displacement of mineral diesel with biodiesel. The results quantify technical outputs of the systems and also the associated financial and greenhouse gas emissions of each system and scenario. The results indicate that significant mitigation is possible from each regional household using woodgas technologies or biodiesel fuels, yet the associated costs of this mitigation is extremely high when compared to the electricity network. In light of the extremely high cost of electricity and mitigation using small-scale bioenergy systems, governments may consider re-allocation of small-scale grid-connected distributed energy support mechanisms towards larger regional bioenergy projects, or risk increasing the electricity prices for private entities and governments
Aerial view of harbor showing Fort McHenry, Baltimore, Maryland, circa 1930-1941
No full textAerial view of Harbor showing Fort McHenry, Baltimore, Maryland, circa 1930-1941. Caption reads: "FORT McHENRY stands in tribute to those men who fought bravely defending its ramparts during the bombardment of the British Fleet in 1814, and to Francis Scott Key, who at that time was inspired to write the Star Spangled Banner. In 1925 the Government declared Fort McHenry a national park, after having restored it as nearly as possible to its appearance in 1814. Fort McHenry is visited by more than 200,000 persons each year." Postmark date: Aug. 20, 1941; Postcard number: 136, OB-H1383; Message included
Stratigraphy and Extent of the Pearl-Ashmore Aquifer, Mchenry County, IL, USA
No full textQuaternary glacial till, outwash, lake sediments, and loess compose the surficial deposits of McHenry County, Illinois. Much of the landscape of McHenry County were formed by at least three separate advances of the Harvard Sublobe of the Wisconsin Episode Lake Michigan Lobe, which was part of the Laurentide Ice Sheet. This project focuses on the delineation of the stratigraphy and extent of the Pearl-Ashmore Aquifer. The Pearl-Ashmore Aquifer is the combination of the proglacial outwash of the Wisconsin Episode Ashmore Tongue of the Henry Formation and the youngest outwash associated with the Illinois Episode, which is the Pearl Formation. A 3-D geologic model was generated from a number of different subsurface geologic data sets, including geologic borings, and municipal and private water well records. These data were initially visualized and interpreted in the 3-D environment using ESRI’s ArcScene. More than 700 wells were used to construct the model. The stratigraphic picks were imported into Petrel, and horizons were created from the surface data to complete the 3-D geologic model. Isopach maps of each unit were then created. The Pearl-Ashmore Aquifer extends through the eastern two-thirds of McHenry County. The 3-D geologic model predicts that the aquifer has an average thickness ranging from 5 to 15 m and is thickest in the north-central portion of McHenry County where it can reach thicknesses of up to 40 m
Hybrid microalgal biofuel, desalination, and solution mining systems: increased industrial waste energy, carbon, and water use efficiencies
No full textThis work reviews retrofitting new waste energy, carbon and water intensive technologies into existing industrial facilities (including electricity generators) to increase net energy, carbon, and water use efficiencies. The three applications reviewed are microalgal ponds consuming flue gasses and providing thermal power station cooling services, thermally driven membrane distillation desalination, and hydrometallurgical solution mining processes to indirectly remove water contaminants, and additional power station cooling. The aim of this work is to explore the unique challenge of site-specificity of retrofitting any or all of the reviewed technologies within existing facilities for commercial operations. The theoretical basis behind higher aggregated efficiencies is essentially vertical integration of infrastructure, energy, and material flows, reducing total costs, net waste, and associated potential environmental contamination. Whilst solution mining and some thermal desalination technologies are not necessarily new in isolation, new technical developments enable these technologies to use waste heat and waste water by operating in parallel with industrial facilities, and effectively subsidise microalgae biofuel water pumping and dewatering. This research determines three fundamental developments are required to enable wide-scale industrial co-located vertical integration efficiencies: (1) fundamental engineering, (2) monitoring system innovation, and (3) technology/knowledge transfer
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
Indigenous Aeta Magbukún self-identity, social-political structures, and self-determination at the local level in the Philippines
No full textThe Indigenous Aeta Magbukún maintain a primarily nomadic hunter-gatherer lifestyle in their forested ancestral lands. Through the continued encroachment of non-Indigenous populations, the Aeta Magbukún persist at a critical level. Finding it increasingly difficult to sustain their traditional livelihoods, they must engage in informal commerce to procure sufficient food throughout the year. This work explores the basis of self-identity, traditional kinship ties, evolution of sociopolitical organisation, and the developing political options that sustain the small and vulnerable Indigenous population. Despite recent tentative sociopolitical developments, securing cultural protection requires greater effort in developing political communication and representation at a local and national level. In doing so, the Aeta Magbukún can meet their basic needs, secure traditional cultural knowledge, and are able to influence their own development during a time of relatively rapid acculturation within the mainstream Philippine societal complex
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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