197,361 research outputs found
Learning from biophysical heterogeneity: inductive use of case studies for maize cropping systems in Central America
No full textGlobal society has become conscious that efforts towards securing food production will only be successful if agricultural production increases are obtained through mechanisms that ensure active regeneration of the natural resource base. Production options should be targeted in the sense of that their suitability to improve agricultural production and maintain natural resources is evaluated prior to their introduction. Biophysical targeting evaluates production options as a function of the spatial and temporal variability of climate conditions, in interaction with soil, crop characteristics and agronomic management strategies. This thesis contributes to the development of a system-based methodology for biophysical targeting. Cropping system simulation and weather generator tools are interfaced to geographical information systems. Inductive use of two case studies - a green manure cover crop and reduced tillage with residue management - helped to develop the methodology. Insight is gained into the regional potential for and the soil and climate conditions under which successful introduction of these production options may be achieved. The resulting information supports regional stakeholders involved in agriculture in their analysis and discussion, negotiation and decision-making concerning where to implement production systems. This process can improve the supply of appropriate agricultural production practices that enhance production and conserve soil and water resources
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
Modal analysis of violin bodies viewed as three-dimensional structures
No full textModal analyses of violins show several strong modes in the low frequency range. Holographic interferograms suggest that four strong modes can be interpreted as doublets having two and three nodal planes that intersect a cylinder with a roughly elliptical cross section at the bridge [A. Runnemalm, N.-E. Molin, and E. Jansson, J. Acoust. Soc. Am. 107, 3452-3459 (2000); M. Roberts and T. D. Rossing, Catgut Acoust. Soc. J. 3, 9-15 (1998)]. This is especially clear when the instrument is viewed simultaneously from three sides using mirrors, and the holographic system is made sensitive to in-plane motion as well. These doublets are not unlike those observed in cylindrical vibrators such as bells, and they remind us that a violin is a 3-dimensional object.</p
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
Dr. Glendon Swarthout
No full textHosted by Roger M. Busfield, MSU Assistant Professor of Speech and Theater, Meet the Author is designed to introduce a general audience to a contemporary author and their work through in-depth interviews. This episode features a conversation between Dr. Glendon Swarthout, prolific author and English professor at MSU, and assistant professors Sam S. Baskett and Theodore B. Strandness
Van landschapsecologie naar ziektebeheersing : ruimtelijke epidemiologie van Phytophthora infestans
No full textAuteurs en titels van de samenvattingen: 1) J.G.N. Wander, H.G. Spits, G.T.J. Kessel en H.T.A,M. Schepers. BOS [BeslissingsOndersteunendeSystemen] veldbeoordeling gefocust op resistentie verschillen tussen rassen; 2) Wopke van der Werf, Peter Skeksey, Diedert Spijkerboer, Walter A.H. Rossing en Geert J.T. Kessel. Van landschapsecologie naar ziektebeheersing: ruimtelijke epidemiologie van Phytophthora infestans; 3) L.P.N.M. Kroon en W.G. Flier. Waardplant-specificiteit in Phytophthora soorten; verbreding van de waardplantreeks door interspecifieke hybridisatie en adaptatie; 4)M. Hospers. Biologische aardappelteelt in Europa; inventarisatie van Phytophthora management in de praktij
Auditory demonstrations
No full textIn 1978, a set of auditory demonstration tapes was released by the Laboratory of Psychophysics of Harvard University. These demonstrations had been prepared by a team led by Prof. David M. Green and were sponsored by a grant from the National Science Foundation. The tape set, which contained 20 recorded demonstrations on psychoacoustics plus an explanatory booklet, became so popular that all copies were quickly distributed and tape sets were no longer available.
In 1984, the Acoustical Society of America's Committee on Education in Acoustics requested T.D. Rossing and W.D. Ward to look into the feasibility of re-issuing the Harvard tapes . A decision was made to update the demonstration material and to issue it on a high-quality sound reproduction medium. The Institute for Perception Research (!PO) in Eindhoven was engaged to produce the audio material. Both the Eindhoven University of Technology and the Philips Company, the joint sponsors of IPO, made manpower available for the project. Philips Polygram and Philips & Dupont Optical Co. (PDO) agreed to handle the digital tape mastering and the production of a Compact Disc. Northern Illinois University supported the project through a grant for improvement of undergraduate education. The Acoustical Society of America agreed to provide further financial backing for the project.
Many people in the United States and Europe have contributed to the realization of this project. A preliminary scenario by T.D. Rossing was developed through frequent discussions with A.J.M. Houtsma and W.M. Wagenaars, who composed and synthesized the audio material with 16-bit digital techniques. Th. de Jong of IPO provided invaluable techical assistance. The narration by Prof. Ira J. Hirsh was recorded at the Cerntral Institute for the Deaf in Saint Louis. Speech samples in Demonstrations 4 and 35 were provided by, respectively, J. 't Hart and Dr. Sanford Fidel!. The instrumental scales of Demonstration 30 were played by bassoonist B. van den Brink of the Brabant Orchestra.
The text booklet ( libretto ) was written by T .D. Rossing and A.J .M. Houtsma.
A trial version of the demonstrations was field-tested and critically reviewed by D.E. Hall, W.M. Hartmann and W.D. Ward, which led to substantial improvements. Special thanks go to the IPO director H. Bouma, to G. van Hoeyen of Philips Polygram, and to A. Rehnberg and G..J.A. Vogelaar of PDO for their enthusiastic administrative and technical support.
The 39 demonstrations on this compact disc have been put on separate tracks. Each demonstration can easily be found by cueing the CD player to the desired number. On CD players which allow indexing, parts of demonstrations can be reached individually.
Demonstrations in Sections I through VI have been designed for typical classroom use.
The demonstrations of Section VII must be heard through headphones to obtain the desired effects
Simulation of thermal plant optimization and hydraulic aspects of thermal distribution loops for large campuses
No full textFollowing an introduction, the author describes Texas A&M University and its utilities system. After that, the author presents how to construct simulation models for chilled water and heating hot water distribution systems. The simulation model was used in a $2.3 million Ross Street chilled water pipe replacement project at Texas A&M University. A second project conducted at the University of Texas at San Antonio was used as an example to demonstrate how to identify and design an optimal distribution system by using a simulation model. The author found that the minor losses of these closed loop thermal distribution systems are significantly higher than potable water distribution systems. In the second part of the report, the author presents the latest development of software called the Plant Optimization Program, which can simulate cogeneration plant operation, estimate its operation cost and provide optimized operation suggestions. The author also developed detailed simulation models for a gas turbine and heat recovery steam generator and identified significant potential savings. Finally, the author also used a steam turbine as an example to present a multi-regression method on constructing simulation models by using basic statistics and optimization algorithms. This report presents a survey of the author??s working experience at the Energy Systems Laboratory (ESL) at Texas A&M University during the period of January 2002 through March 2004. The purpose of the above work was to allow the author to become familiar with the practice of engineering. The result is that the author knows how to complete a project from start to finish and understands how both technical and nontechnical aspects of a project need to be considered in order to ensure a quality deliverable and bring a project to successful completion. This report concludes that the objectives of the internship were successfully accomplished and that the requirements for the degree of Degree of Engineering have been satisfied
Auditory demonstrations
No full textIn 1978, a set of auditory demonstration tapes was released by the Laboratory of Psychophysics of Harvard University. These demonstrations had been prepared by a team led by Prof. David M. Green and were sponsored by a grant from the National Science Foundation. The tape set, which contained 20 recorded demonstrations on psychoacoustics plus an explanatory booklet, became so popular that all copies were quickly distributed and tape sets were no longer available. In 1984, the Acoustical Society of America's Committee on Education in Acoustics requested T.D. Rossing and W.D. Ward to look into the feasibility of re-issuing the "Harvard tapes". A decision was made to update the demonstration material and to issue it on a high-quality sound reproduction medium. The Institute for Perception Research (!PO) in Eindhoven was engaged to produce the audio material. Both the Eindhoven University of Technology and the Philips Company, the joint sponsors of IPO, made manpower available for the project. Philips Polygram and Philips & Dupont Optical Co. (PDO) agreed to handle the digital tape mastering and the production of a Compact Disc. Northern Illinois University supported the project through a grant for improvement of undergraduate education. The Acoustical Society of America agreed to provide further financial backing for the project. Many people in the United States and Europe have contributed to the realization of this project. A preliminary scenario by T.D. Rossing was developed through frequent discussions with A.J.M. Houtsma and W.M. Wagenaars, who composed and synthesized the audio material with 16-bit digital techniques. Th. de Jong of IPO provided invaluable techical assistance. The narration by Prof. Ira J. Hirsh was recorded at the Cerntral Institute for the Deaf in Saint Louis. Speech samples in Demonstrations 4 and 35 were provided by, respectively, J. 't Hart and Dr. Sanford Fidel!. The instrumental scales of Demonstration 30 were played by bassoonist B. van den Brink of the Brabant Orchestra. The text booklet ("libretto") was written by T .D. Rossing and A.J .M. Houtsma. A trial version of the demonstrations was field-tested and critically reviewed by D.E. Hall, W.M. Hartmann and W.D. Ward, which led to substantial improvements. Special thanks go to the IPO director H. Bouma, to G. van Hoeyen of Philips Polygram, and to A. Rehnberg and G..J.A. Vogelaar of PDO for their enthusiastic administrative and technical support. The 39 demonstrations on this compact disc have been put on separate tracks. Each demonstration can easily be found by cueing the CD player to the desired number. On CD players which allow indexing, parts of demonstrations can be reached individually. Demonstrations in Sections I through VI have been designed for typical classroom use. The demonstrations of Section VII must be heard through headphones to obtain the desired effects
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