Digital Commons Network^™

Agroecosystems, Nitrogen-Use Efficiency, And Nitrogen Management, Kenneth G. Cassman, Achim R. Dobermann, Daniel T. Walters

Department of Agronomy and Horticulture: Faculty Publications

The global challenge of meeting increased food demand and protecting environmental quality will be won or lost in cropping systems that produce maize, rice, and wheat. Achieving synchrony between N supply and crop demand without excess or deficiency is the key to optimizing trade-offs amongst yield, profit, and environmental protection in both large-scale systems in developed countries and small-scale systems in developing countries. Setting the research agenda and developing effective policies to meet this challenge requires quantitative understanding of current levels of N-use efficiency and losses in these systems, the biophysical controls on these factors, and the economic returns from …

Social Entrepreneurship In Singapore (German Version), Wee Liang Tan, Teck Meng Tan

Research Collection Lee Kong Chian School Of Business

No abstract provided.

Amusing Monsters, Anthony Paul Farley

Cardozo Law Review

No abstract provided.

Usd Magazine Spring 2002 17.3, University Of San Diego

University of San Diego Magazine (1992- )

Features; Alcala Almanac; On the Map; Last Minute Spring Fling; The Stress Test; A Lesson in Faith; Alumni Gallery; In Their Own Words; Calendar

Motions 2002 Volume 37 Number 6, University Of San Diego School Of Law Student Bar Association

Newspaper, Motions (1987-2019)

No abstract provided.

Differences In The Functional Neuroanatomy Of Inhibitory Control Across The Adult Life Span, Kristy A. Nielson, Scott Aaron Langenecker, Hugh Garavan

Psychology Faculty Research and Publications

Inhibitory control, the ability to suppress irrelevant stimuli, is a fundamental cognitive function that deteriorates during aging, but little is understood about the bases of decline. Thus, we used event-related functional magnetic resonance imaging (fMRI) to study inhibitory control in healthy adults aged 18 to 78. Activation during "successful inhibition" occurred predominantly in right prefrontal and parietal regions and was more extensive, bilaterally, and prefrontally, in the older groups. Presupplementary motor area was also more active in poorer inhibitory performers. Therefore, older adults activate areas that are comparable to those activated by young adults during inhibition, as well as additional …

The George-Anne, Georgia Southern University

The George-Anne

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Newsletter, Florida Ornithological Society, Volume 28, No. 2, Spring 2002, Katy Nesmith

Florida Ornithological Society - Records - Full Collection

Spring 2002 edition of the Florida Ornithological Society Newsletter, including note from the editor, announcements, requests for assistance, and notes.

Ammonia Sampling Using Ogawa® Passive Samplers, Paul Tate

USF Tampa Graduate Theses and Dissertations

The purposes of this research were to determine the efficacy of using the Ogawa® passive sampling device (PSD) to measure ammonia and to identify significant ammonia sources adjacent to Hillsborough and Tampa Bay. Ninety-four samplers were deployed over a 180-km² area for two weeks in October 2001. Within the area sampled were located suburbs, an urban center, major highways, port activities, fertilizer manufacturing, wastewater treatment, coal-combustion power plants, warehousing and dairy farming. The sampled locations were arranged in a triangular grid pattern spaced 1.5 km apart. The pattern was designed to locate circular hot spots with a minimum radius …

Effect Of Ph And Gas-Phase Ozone Concentration On The Decolorization Of Common Textile Dyes, Craig D. Adams, Steven Gorg

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

This paper presents the results of a laboratory study on the effect of pH (2, 5, and 9) and gas-phase ozone concentration (1, 7, and 11 wt. %) on the decolorization efficiency via ozonation for seven common textile dyes. Higher gas-phase ozone concentrations resulted in higher decolorization rates due to more rapid ozone transfer. Higher gas-phase ozone concentration, however, was also observed to have a positive, neutral, or negative effect on ozone dose requirements for different dyes. In general, greater ozone utilization efficiency was achieved at lower pH levels where direct ozone reactions predominate. It was observed that because ozonation …

Removal Of Antibiotics From Surface And Distilled Water In Conventional Water Treatment Processes, Craig D. Adams, Yang Wang, K. Loftin, M. Meyer

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Conventional drinking water treatment processes were evaluated under typical water treatment plant conditions to determine their effectiveness in the removal of seven common antibiotics: carbadox, sulfachlorpyridazine, sulfadimethoxine, sulfamerazine, sulfamethazine, sulfathiazole, and trimethoprim. Experiments were conducted using synthetic solutions prepared by spiking both distilled/ deionized water and Missouri River water with the studied compounds. Sorption on Calgon WPH powdered activated carbon, reverse osmosis, and oxidation with chlorine and ozone under typical plant conditions were all shown to be effective in removing the studied antibiotics. Conversely, coagulation/flocculation/sedimentation with alum and iron salts, excess lime/soda ash softening, ultraviolet irradiation at disinfection dosages, and …

The Resurrection Of A River: The Umatilla And Its Salmon, Christopher Ward Shelley

Dissertations and Theses

Until the 1990s, salmon had been extinct from the Umatilla River for over 70 years. The struggle to bring salmon back to this river is a compelling story that exemplifies some of the new relationships in Columbia River Basin salmon management.

The Umatilla River and the disappearance of its salmon was a local issue. Irrigation interests had used the river so thoroughly it ceased to flow during the late summer and fall months-precisely when salmon needed it for migration. The Confederated Tribes of the Umatilla Indian Reservation saw decided that they would change that: they would figure out a way …

Chimes: March 1, 2002, Calvin College

Chimes

Lilly gives Calvin $7 million more by Becca Morrison

Breathalyzers are new tool against alcohol on campus by Beth Heinen

Kent County's Millenium Park to open by summer by Kate Medema

Men's basketball surrenders to Hope by Ross Weener

Forum in March to raise awareness of tobacco industry, not smoking by Christian Bell

Construction gets underway in Spoelhof by Maisie Covert

Where service and learning collide: Spring opportunities for service learners by Erin Fields

Calvin swimming teams compete at MIAA conference championships by Andrea Schutter

Haste Makes Waste: Congress And The Common Law In Cyberspace, Suzanna Sherry

Vanderbilt Law Review

Speed is an asset in computer technology, but not necessarily in law. The new technologies of the twentieth and twenty-first centuries have inevitably raised new legal questions; all too often, the response to these new legal challenges is a hastily enacted federal statute. If the Internet allows children access to pornography, we enact the Communications Decency Act ("CDA"). Commercial concerns about cyber-authenticity prompt the Electronic Signatures in Global and National Commerce Act ("E-SIGN"). Are cybersquatters creating domain name problems? We've got a law for that, too. These are just a few of the quick fixes driven by a perceived need …

Introduction To Three Dimensional Composition / Dancing On The Digital Divide, Geoffrey Adams, Karen King

Proceedings of the 18th National Conference on the Beginning Design Student

Students entering the 3.5Y Masters program at UNM, come to embark on a course of study in architectural design. While all student populations are composed of unique individuals from various backgrounds, this particular group is, at least in an academic discipline by definition heterogeneous, possessing skills and knowledge in diverse fields gained through previous studies and/or employment. What they share is a burgeoning interest in architecture and a willingness to explore design in a studio environment, to start down a path toward a new way of perceiving and engaging the world. This peculiar mix of naivety and sophistication coupled with …

Design As A Liberating Practice: Design-Build With First Years, Eduardo Aquino

Proceedings of the 18th National Conference on the Beginning Design Student

The academy is not paradise. But learning is a place where paradise can be created. The classroom [studio], with all its limitations, remains a location of possibilrt.y. In that field of possibility we have the opportunity to labor for freedom, to demand of ourselves and our comrades, an openness of mind and heart that allows us to face realrty even as we collectively imagine ways to move beyond boundaries, to transgress.This is education as the practice of freedom.

In The Beginning -- We [Design For] Humans, An Opening Studio Curriculum For An Architectural Professional Program, Alex Maller

Proceedings of the 18th National Conference on the Beginning Design Student

Two years ago, aft.er long deliberations, the Archrtectural Program at the University of Nebraska-Lincoln formally adopted a significant programmatic change: it restructured its curriculum from a 4+2 curriculum to a 2+4 curriculum. In the same time the status of the program was redefined as a 'professional' program similar to other professional programs, such as Law and Medicine. These changes enable the program to adopt a more autonomous position in the University. As part of the restructuring process a number of essential changes were introduced, two with a significant impact on our current discussion: [a] the two first years were incorporated …

Design As Language, Patrick Louis Carrico

Proceedings of the 18th National Conference on the Beginning Design Student

Good design has many faces; one is articulated well by the principals of Gestalt, while another is formed by tradition and style. When teaching design, it is important to delineate between the two. What makes the Mona Lisa universal and the cover of "Staying Alive" doomed is that the former uses good design grammar; and the latter uses an obsolete design dialect. Understanding their difference is integral in deciding the line between less expressive designs, like commercial design, and the design layer of a cathartic painting. Design is a language.

Educating Emerging Vision, Marcella Eaton, Karen Wilson Baptist

Proceedings of the 18th National Conference on the Beginning Design Student

Learning to see requires practice, risk-taking, and a deliberate awakening of conscious perception. Vision which can be interpreted as an integrated human capacity that emerges from the world of lived experience, is participatory and engaged rather than detached and observatory. Learning to look - vision- is deeply subjective, emerging from experience and critical consciousness. When vision becomes clear, students become aware of what was once hidden, lost, or invisible to them. Awakened vision requires a response. Educators must teach learners to balance their vision with action.channeling 'seeing' as a force against fear, and isolation, (that so often occurs in the …

Determination Of Chlorinated Solvent Contamination In An Upward Flow Constructed Wetland, Bryan C. Opperman

Theses and Dissertations

The purpose of this study is to determine chlorinated solvent contamination levels in an upward flow constructed wetland at Wright-Patterson Air Force Base (WPAFB), Ohio. A stratified grid sampling methodology will be used in sampling the contaminated groundwater. Analysis will be accomplished by means of purge-and-trap gas chromatography. The contaminant concentration levels will be used to enhance the design and construction of man-made wetlands used to remove chlorinated solvents from aquifers. PCE levels declined from an average of 33.97 ppb in the inflow stream to an average of 3.65 ppb in the upper layer, a 91% reduction. High concentrations occurred …

A Novel Electrocardiogram Segmentation Algorithm Using A Multiple Model Adaptive Estimator, Gregory S. Hoffman

Theses and Dissertations

This thesis presents a novel electrocardiogram (ECG) processing algorithm design based on a Multiple Model Adaptive Estimator (MMAE) for a physiological monitoring system. Twenty ECG signals from the MIT ECG database were used to develop system models for the MMAE. The P-wave, QRS complex, and T-wave segments from the characteristic ECG waveform were used to develop hypothesis filter banks. By adding a threshold filter-switching algorithm to the conventional MMAE implementation, the device mimics the way a human analyzer searches the complex ECG signal for a useable temporal landmark and then branches out to find the other key wave components and …

Investigation Of Cooperative Behavior In Autonomous Wide Search Munitions, Robert E. Dunkel Iii

Theses and Dissertations

The purpose of this research is to investigate the effectiveness of wide-area search munitions in various scenarios using different cooperative behavior algorithms. The general scenario involves multiple autonomous munitions searching for an unknown number of targets of different priority in unknown locations. Three cooperative behavior algorithms are used in each scenario: no cooperation, cooperative attack only, and cooperative classification and attack. In the cooperative cases, the munitions allocate tasks on-line as a group, using linear programming techniques to determine the optimum allocation. Each munition provides inputs to the task allocation routine in the form of probabilities of successfully being able …

Groundwater Flow Through A Constructed Treatment Wetland, Andrew C. Entingh

Theses and Dissertations

This study examines the flow of groundwater through one of the treatment cells. A major goal of the study is to determine whether the system design facilitates uniform vertical flows through the subsurface soil sediments or if preferential flows occur. Conceptually, uniform flows will achieve the most efficient degree of contaminant removal possible by evenly dispersing the groundwater contaminants throughout the full volume of the subsurface media. A three-dimensional grid of piezometers is used to generate potentiometric contour maps, and in-situ tests of hydraulic conductivity facilitate construction of a numerical computer model. The contours of hydraulic head, measured conductivities, and …

Less Developed Country Business Cycles, Hing-Man Leung

Research Collection School Of Economics

Less developed countries (LDCs) have experienced considerable business cycles in recent decades. This coincides with significant increases in their external debt to GDP ratios. Recent theoretical credit cycles literature suggests that indebtedness, and the resulting liquidity constraints, could explain LDC business cycles. This paper builds a macroeconomic model to trace the LDC income paths. In this model indebtedness and liquidity constraints reduce aggregate investment. We use the World Data (1995) to calibrate for the convergence parameter. It is found that LDC cycles are convergent and non-oscillatory, and indebtedness delays the return to long-term steady state income.

Marketing Kentucky Hay, Billy Ray Smith

Kentucky Alfalfa and Stored Forage Conference

The production of hay and pasture crops is essential to a profitable future for Kentucky agriculture. The Commonwealth ranked seventh in the nation in hay production in the year 2000 with 6.2 million tons. These forages provide the bulk of the feed supply for our livestock industry. In addition, a significant portion of our hay crop is marketed, both to in-state and out-of-state buyers.

Designing A Grazing System For Alfalfa, Ken Johnson

Kentucky Alfalfa and Stored Forage Conference

As we think about grazing alfalfa, we should decide why we are considering alfalfa and where it fits. I want to address some of these issues from my prospective as a grazer with several years experience and as an agriculture employee working with many grazers over the years. Alfalfa is the most productive, high quality grazing forage we can grow in Kentucky; we need to be using it more.

Grazing Alfalfa At The Western Kentucky University Farm, Byron Sleugh, Raquel Stiles, David K. Stiles, Amanda Canty, Curtis Mitchell

Kentucky Alfalfa and Stored Forage Conference

Alfalfa has been around for centuries. In all this time, it was used in many different ways to provide high quality forage to livestock. In fact, in the area where alfalfa originated, the word actually means "horse power". We have come a long way since then and alfalfa is used for a wide range of animals, from rabbits to rhinos.

In order to maximize the efficiency of utilization of alfalfa, it has become necessary to graze it. Grazing is preferred over harvesting and storage for several reasons: less equipment and thus lower cost, less harvest loss, and greater quality forage …

Observer, Central Washington University

Student Newspaper

Student newspaper for Central Washington University for February 28, 2002

The Cord Weekly (February 28, 2002)

The Cord

No abstract provided.

The Four Hundred Second Report Of The Curricular Affairs Committee: Sections I, Ii And Iii, University Of Rhode Island Faculty Senate

Faculty Senate Bills

No abstract provided.